Method and apparatus for manufacture of flat fiber-reinforced articles

FIELD: process for manufacture of flat fiber-reinforced composite article which may be used as construction or packaging material.

SUBSTANCE: method involves placing fibers on lower substrate; applying liquid foam hardening binding agent onto fibers so as to completely coat fibers with binding agent; feeding fibers coated with binding agent and positioned between upper and lower substrates into space between upper and lower pressing plates continuously movable on upper side relative to lower side of fibers with binding agent, with fibers coated with binding agent moving at the velocity of pressing plates allowing binding agent to be foamed, expanded and hardened between upper and lower pressing plates; removing substrates from hardened article. Method further involves manufacturing cohesion fibrous mat from fibers. Before applying of binding agent onto mat, thickness of fibers makes from about 0.5 mm to about 0.8 mm, width - from 0.3 mm to 2 mm, and length of at least 80% of fibers makes at least 100 mm, moisture content of fibrous mat before application of binding agent is at least 5%. Method further involves applying binding agent onto mat so as to form mixture of binding agent and fibrous mat. Mixture contains fibers close to upper surface of mat, said surface facing upper pressing plates, and to lower surface of mat facing lower pressing plates. Mixture of mat fibers and binding agent is moved by means of upper and lower substrates between which said mixture is positioned. Before removal of substrates, mixture is exposed to pressure of from at least 0.8 bar but not in the excess of 5 bar to result in hardening of flat article having thickness of from about 10 mm to about 150 mm. Also described are apparatus for manufacture of flat fiber-reinforced composite article and flat fiber-reinforced composite rigid article.

EFFECT: minimized manufacture costs and improved quality of article having stable shape.

19 cl, 6 dwg

 

BACKGROUND of the INVENTION

The present invention relates to a method and apparatus for the manufacture of flat composite fiber reinforced products, which can be used as a building or packaging material. This invention also relates to such a flat equipped with fibre composite product.

More specifically, this invention relates to a method for the manufacture of flat fiber reinforced composite products that can be used as a building or packaging material, the method includes: placing the fibers on the lower substrate, coating the fiber binder foaming bonding agent in liquid form so that the agent is fully enveloped fiber, the movement of these fibers with a bonding agent located between the lower and upper substrate, between the lower and upper press plates due to the speed of the continuously moving conveyor plates, allowing the binding agent to foam, expand and harden between the lower and upper press plates.

This invention also relates to a device for the manufacture of flat fiber reinforced composite products that can be used as a building or packaging material is, the specified device includes: an input end for receiving fibers coated with a binder agent, the output end to output of finished flat fiber reinforced composite products made by this device, the top continuously moving tape, consisting of a set of upper pressing plates, managed at least two elongated control elements installed in the longitudinal direction of the device made with the possibility of continuous motion on top of a closed trajectory, and lower continuously moving tape, consisting of a set of lower pressing plates, managed at least two elongated control elements installed in the longitudinal direction of the device, made with the possibility of continuous movement along the lower closed path, while the upper pressing plate form a first essentially flat surface of the upper closed path, and the lower pressing plate form a second essentially flat surface of the bottom closed path parallel to the first flat surface, these upper and lower pressing plate is made to move in a specified area of fibers impregnated with a binder agent, a feeding means for feeding the upper substrate and the lower substrate specified in the ONU, when the upper substrate is configured to clamp in a specified zone to the upper pressing plates, and the bottom substrate is configured to clamp to the bottom of the pressing plates, and movement at a speed equal to the speed of the lower pressing plates.

The present invention also relates to a flat equipped with fiber composite article containing fibers, impregnated with a binding agent that can be used as a building or packaging material.

Flat fiber-reinforced composite parts used in construction and as a packaging material, is known from the prior art. They can be provided with a protective coating, which in some cases give the product as a more attractive appearance.

A disadvantage of the known flat fibre reinforced composite products is the complexity of their manufacture. They are also susceptible to humidity and temperature fluctuations, which can lead to deformation of the product. In this regard, the known methods of manufacture require significant capital investments and, in addition, a significant production volumes. In addition, the finished product, for example product, the reinforced fiber is exposed to significant fluctuations in humidity. A known example is about a method of manufacturing a fibre reinforced products for example particle boards, is the production with the use of a press with double strap. Press with double strap is a great device that uses high pressure, typically about 30 bar, and high temperature, typically in the range from 150 to 200°C. Capital investment and production costs of such devices is quite significant. In addition, they require significant production areas.

In U.S. patent 5089189 disclosed a method and apparatus for the manufacture of flat composite products. These method and apparatus are complex and do not allow economical to produce composite parts with high thickness, which can be used as a building or packaging material.

BRIEF description of the INVENTION

The aim of the present invention is a method and device which allow to reduce production costs in the manufacture of flat fibre reinforced composite products, thus their production is economically advantageous for both large and small production volumes. Products usually are intended for use in construction and for packaging and competitive with products of the same application. Another purpose of this invention is to provide a product with Usto the Chiva form, what is the advantage in its production.

To achieve this goal, the proposed method differs in that it comprises the following stages: preparation of fibers in the form of three-dimensional cohesive fibrous Mat of belonging together of the fibers, the thickness of which is typically in the range from 0.5 to 0.8 mm, a width of from 0.3 to 2 mm and a length of at least 80% of the fibers is not less than 100 mm before applying a bonding agent to the fibrous Mat, ensuring the fibrous Mat is not more than 5% before applying the bonding agent to the fibrous Mat, applying a bonding agent to the fibrous Mat to obtain a mixture of the fibrous Mat and a bonding agent, while this mixture contains fiber close to its upper surface facing the upper pressing plates, and also close to the lower surface facing the lower pressing plates, the application mixture to a pressure of at least 0.8 bar, but not more than 5 bar, which leads to solidification of the mixture in the form of a flat product of thickness from 10 to 150 mm and containing fibers close to its upper and lower surfaces when moving the mixture between the pressure plates, and then remove the lower and upper substrates with a cured product containing fibers and a binder agent.

The term fibrous Mat in this context refers mainly to the structure formed from the aqueous or more layers of fibers, each of which can take the form of three-dimensional fibrous Mat. If fibrous Mat contains many layers/Mat, which is typical in the production of thicker products (products with a thickness of greater than 60 mm), the layers are placed in such a way that the finished product contains a layer close to both surfaces of the finished product. Layers that are used in thick products (with a thickness of greater than 60 mm), does not necessarily have to be the same density. In addition, the layer of lower density may be placed between the layers located close to the surface of the product facing each other.

The fibrous Mat is preferably made of hygroscopic fibers. The fibers can be natural or synthetic. Preferably the moisture content of the fibers is a maximum of 8%, and after final processing of the Mat prior to its impregnation with the binder agent humidity finished fibrous Mat does not exceed a maximum of 3%. Fibrous Mat should have a relatively low humidity at the time of filling fiber binding agent, such as polyurethane. As a result, the binding reagent is rigidly associated with the fiber, which is important to achieve the desired physical properties of the finished product, such as strength.

The finished product with good physical properties is obtained when the and fibrous Mat made from fibers, which in the mass have a thickness of from 0.5 to 0.8 mm, and a width of from 0.3 to 2 mm and a length of at least 80% of the fibers is not less than 100 mm To obtain a product of sustainable forms with good insulating properties can be used wood fiber, and the binder agent preferably may be polyurethane.

The desired density and strength of the finished product is achieved by exposure of the mixture of fibers and a bonding agent, when a foaming binder agent at a maximum pressure 1 to 2 bar in the process of moving this mixture between the pressure plates.

Preferred variants of embodiment of the proposed method are disclosed in PP-11 of the accompanying claims.

The device according to this invention differs in that it includes means for pressing a pressure on the pressure plates, at least 0.8 bar and means for heating the mixture of fibers and a bonding agent, while the upper pressing plate of the device are held at a distance of from 10 to 150 mm from the bottom of the pressing plates.

The first essentially planar surface and a second essentially planar surface, which are formed respectively the upper and lower clamping elements, should not be exactly parallel, and may form a small angle, for example, from 1 to 5 in the business degrees.

The device may be characterized as dvuhnitochnyj conveyor or laminator. The prior art dvuhetajnyi conveyors/laminators, different from the present device and used for other purposes. Therefore, the present invention is to use dvuhnitochnogo conveyor/laminator for manufacturing flat fibre reinforced composite products.

Therefore, the device according to this invention is a laminator that is different from the known from the prior art laminating machines that are specially designed with the ability to create pressure in the manufacture of flat fibre reinforced composite products. Standard laminators for the production of polyurethane or puff panels are not capable of withstanding pressures greater than approximately 0.7 bar.

Preferably, the feeding and receiving means adapted to move the upper and lower substrates with appropriate continuous tracks. Thus, a continuously operating device capable of producing a few meters of tiles using a small number of substrates, which, depending on the volume of production can do the desired number of revolutions in their respective continuous tracks.

The working area of the device is STV, where the manufacture of the plate, in other words, the area that extends from the input end to the output end, preferably has a length in the range from 5 to 30 m and a width in the range from 1 to 5 PM

Preferably the device includes a number of spray nozzles that are placed in such a way as to ensure rapid and uniform deposition of the desired amount of binding agent to a predetermined area of the lower substrate. These nozzles may be fixed or movable, moving the reciprocating over the fibrous Mat.

Preferably the device comprises means for pressing cylinder. These cylinders allow you to get the finished product before it leaves the device, with a pressure of 0.8 bar provides an acceptable density of the final product when using polyurethane as a binder agent. The finished product is of the required size is obtained by cutting of the products emerging from the device to the desired size. The desired thickness of the finished product is achieved by adjusting the distance between the upper and lower pressing plates, which respectively are configured means for pressing the device. The weight ratio of fibers and a bonding agent in the finished product mainly accounted for the provides from 0.8 to 2, which corresponds to from 45 to 67 wt.% number of fibers in the finished product. A higher value of the weight ratio (i.e. preferably closer to 2 than to 0.8) aimed at reducing the production cost of the product, which may increase while the proportion of binding agent. The weight ratio may be in the range from 0.1 to 4, i.e., the amount of wood fiber in the finished product ranges from 10 to 80 wt.%.

The preferred embodiment of the device according to the present invention disclosed in PP-17 claims.

The most important advantage of the method and device according to the present invention is the ability to economically produce flat fiber reinforced composite product that retains its shape, both large and small production volumes, while such products can be used as a building or packaging material. This is because the capital cost and operating cost of manufacturing the device are low in comparison, for example, using dvuhnitochnogo pipeline, and the fact that the fibrous Mat is included in the product. At low production volumes do not need to use continuous production.

Flat fiber reinforced composite product according infusion is his invention differs the thickness of the flat product is from 10 to 150 mm, the fibers form a three-dimensional cohesive Mat in which the fibers are impregnated with a binder agent, and the thickness of the fibers is mainly in the range from 0.5 to 0.8 mm, a width in the range from 0.3 to 2 mm and a length of at least 80% of the fibers is not less than 100 mm, and the composite product contains fiber close to the upper and lower surfaces, and the weight ratio of fibers and a bonding agent is in the range from 0.1 to 4. Preferably the fibrous Mat extends from the lower to the upper surface of the product. Therefore, some of the fibers extend from the lower surface to the upper surface. Preferred options for implementation of the proposed flat products disclosed in PP-21 of the accompanying claims.

The most important advantage of the composite parts is that the shape of the product remains stable, which is especially important for building materials used in construction, the product has a good ratio of strength/density, while the cost of its production remains low.

BRIEF DESCRIPTION of DRAWINGS

The invention will be described in more detail below with reference to the attached drawings, where

Figure 1 is a side view schematic representation of the device

Figure 2 is a top view of the device shown is as Fig.1,

Figure 3 - view of the device shown in figure 2 in cross section along III-III

4 is a detail of the device shown in figure 1-3,

Figure 5 - the product according to this invention,

6 is a diagram of the method according to this invention.

DETAILED description of the INVENTION

Figure 1 shows a device for the continuous production of flat fibre reinforced composite products, which include a fibrous component and a binder agent. The binding agent can be called filler. The fibrous component is a fibrous Mat, for example, wood wool, and the binder agent is, for example, polyurethane foams which the device in order to harden to produce a gas cell. The product, including such component parts, has good characteristics when used as a building material, if required insulating properties, special durability and stable sizes under different conditions. The product can also be used for packaging and other purposes. Instead of fibers based on wood and cellulose fibrous component may mainly include fiber, which gives the product the desired increase in strength as compared with the case where the finished product does not contain fibrous component. Thus, the fibrous component may be, for example, fibreglass. You can also use metallic fiber (filament). In addition to polyurethane as a binder agent, you can use the material on the basis of phenol.

Regardless of the type of binding agent, the fiber is immersed in a binder. Thus, the binding agent connects to the fibers so that the fibers provide the desired increase in strength of the finished product.

The device shown in figure 1, includes a continuous upper strap, band or track 1 and lower endless belt, band or track 2. Both sides of the tracks provided with side covers 26 and 29, as shown in Figure 3. Side hoods from 26 to 29 are not shown in figure 1 to better show the internal parts of the device. Side hoods from 26 to 29 are not necessary.

The upper track 1 contains a lot of pressure pads or pressure plates 3, which may be designated as the upper pressing plate. The number of the pressing plates 3 depends on the length of the device; their number may vary, for example, from 20 to 200. Lower the truck 2 contains many of the pressing plate 4, which may be designated as the lower pressing plate. The number of the lower pressing plate 4 corresponds to the number of the upper pressing plates 3, but may be a bit large, as the fibrous Mat and swiatowej the top agent is not required near the input end 10. The pressure plates 3, 4, made of metal, such as steel or aluminum, are rotated around the respective gear wheels 5, 6 and 7, 8, which are driven by the drive motor 39. Cabin control device indicated by the position 40. The area around the gear wheels 5 and 7 represents the input end 10 of the device and the area around the gear wheels 6 and 8 is the output end of the device.

In the zone between the gear wheels 5 and 6, 7 and 8, respectively, between the input end 10 and the output end 11, tracks 1 and 2 essentially flat. The length of this zone is usually from 5 to 30 m, and the length of the zone from 10 to 20 m provides the most production needs. More than this length, the greater the working speed of the device. Typically in such devices use a moving speed between 2 and 15 meters per minute. Lower the truck 2 starts 2 m to the top of the truck 1, when viewed from the side, where served mixture of the fibrous Mat and a bonding agent. However, this part of the track is not shown on the drawing. Promotion of the truck provides a mixture of the fibrous Mat and the binder agent the best support to its hit between the upper and lower tracks.

So that in this zone the tracks 1, 2 are not bent and have not purchased a shape significantly different from the flat shape, for example, due to pressure in nikawewa when the foaming binder agent, the device comprises a number of cylinders 9, which together with the control elements 32 maintain the flat shape of the pressing plates 3, 4 in this zone, as shown in figures 1 and 4. In figure 1 the purpose of clarity, shows only two cylinders 9, although along the device can be placed a few cylinders. The cylinders 9 allow to keep the distance between the upper and lower tracks depending on trebuemoi thickness of the produced products. Instead of the cylinder 9 can be used for other elements of resistance/regulation to implement the same functions. Both track 1, 2 contain three control element 32, while one is located in the center, and the other two are located on the sides with each side between the two respective ends of the control plates in the Central control element, and the pressure plates 3, 4 can be relatively small and light, but do not cave in under the pressure value from 1 to 2 bar. Control elements 32, placed in the longitudinal direction of the device can be designated as the rails. The pressure plates 3, 4 have the hooks 38, which communicate with the holes in the respective parts 35 of the conveyor so that the grips are holes to move using the links of the conveyor. The links of the conveyor 35 is made so that they are supported by driving the mi elements 32, as shown in Figure 4.

The distance between the upper belt 1 and the lower tape 2 in the area where the binding reagent foams, usually from 10 to 30 mm, but may be up to 150 mm when manufactured finished products of great thickness. If the thickness of the final product is equal to from 30 to 50 mm, this product mainly contains fibrous Mat, close to the bottom surface of the finished product and to the upper surface of the finished product. If the thickness of the finished product exceeds 60 mm, this product mainly contains fibrous Mat consisting of three mats so that the two Mat higher density are close respectively to the upper and lower surfaces of the finished product, and more lightweight (thin) Mat placed between two thicker mats.

The upper substrate 12 is continuously moved relative to the upper continuous track 1. The substrate 12 is supported by four rollers or cylinders 13 through 16, with one cylinder 13 is located close to the input end 10 of the device, and the second cylinder 14 is located close to the output end 11 of the device. The underside of the device provided with a correspondingly lower substrate 17, which is supported by the cylinders 18 through 21 and continuously moves relative to the lower continuous track 2. The drawing shows that the cylinder 18 is located farther from the input end is 10, than the cylinder 13. This is because the bonding agent must be applied to the fibrous Mat before the fibrous Mat and the binder agent will go to the input end 10.

The upper and lower substrates, respectively, 12 and 17, preferably made of polyethylene film. You can also use a film of a different material, but in this case, the material of the film should be selected so that it did not stick binding agent (such as polyurethane). As an example of such a material may be polytetrafluoroethylene (PTFE), commonly known as Teflon.

Figure 1 shows a conveyor 22 through which the fibrous Mat 23 is fed to the lower substrate 17 in the direction of the input end 10 of the device. In the zone, which is designated as area of application, between the cylinders 18 and 13 has a number of nozzles or spray nozzles 24 through which the binder 25 is applied on the lower substrate 17. The number of spray nozzles 24 can be changed: the more products and higher the speed, the more usually you want the spray nozzles. For example, the number of spray nozzles 24 can vary from 3 to 100. Preferably the spray nozzle 24 is made with the possibility of reciprocating motion in the transverse direction relative to the longitudinal direction of the device, when this quantity is STV spray nozzles may be small; it is also possible that the device has only one spray nozzle. The cylinder 13 of the upper polozka 12 occurs with a mixture of fibrous Mat 23 and a bonding agent 25. We can say that the upper and lower substrates, respectively, 12 and 17, to create a kind of form to the mixture. In the area between the input end 10 and the output end 11 a mixture of the fibrous Mat and the binder agent foams and hardens, thus hardened flat product exits from the output end of the coated substrates 12, 17 on both sides. Substrate 12, 17 are removed in the area of the cylinder 14 and 19. Substrate 12, 17 are moved to the respective endless tracks through friction forces operating in the area between the input end 10 and the output end 11. As a variant, it is possible that the substrate 12, 17 forces to move the actuator cylinder, the actuator is the one of the cylinders 13 through 16 and 18 through 21.

Figure 2 shows a top view of the device. In figure 2 is not shown, the upper substrate 12 and the cylinders 14 and 16 is shown in dashed lines. The width of the pressing plates 3, 4 is 3 m, but can be longer - up to 5 m if the manufactured products of large width. The pressure plates 3, 4 can also be much already 3 m, but the width is less than 1 m are not recommended.

Figure 3 shows a longitudinal view of the device shown in figure 2 in cross section along III-III. Naati figure shows what tracks 1, 2 on both sides provided with side covers 26 to 29.

Figure 5 shows the flat fiber reinforced composite product according to the present invention. The drawing shows that the fibers extend from the lower surface to its upper surface so that the fibers are placed throughout the volume of the product. Some fibers permeate the entire product through and through.

Figure 6 shows a detailed diagram of a method of manufacturing a flat fiber reinforced composite parts using the device shown in figure 1-3.

In accordance with the proposed method produces wood fiber thickness of 0.5 to 0.8 mm and a width of from 0.3 to 2 mm, Then the fiber is dried so that the moisture content was very low. Humidity should not exceed 8%. The length of the fibers can vary from 8 to 250 mm From the fiber is made of a three-dimensional Mat 23, while it is preferable that 80% of the fibers had a length of at least 100 mm

The moisture content of the fibrous Mat 23 is 3 to 4%. The desired degree of humidity is achieved by using appropriate drying/humidifiers. If the humidity is outside the specified range, the quality of the finished product turns out to be low. Therefore, the humidity value should exceed 0.5%. Because it is technically easy to achieve the above-mentioned range, the humidity, the person skilled in the art it is clear what type dryers/humidifiers should be used, so the design of this dryer/humidifier detail is not described here.

Fibrous Mat 23 with humidity not more than 4%, and in some cases 5% becomes sustainable by linking together of the fibers. This link provides hold these fibers together in the fibrous material, and the fibers do not disintegrate unwanted manner when applying a bonding agent (polyurethane).

Fibrous Mat 23 move with a speed of 7 meters per minute on the lower substrate 17, and polyurethane in liquid form is applied on the fibrous Mat through the spray nozzle 24. Fibrous Mat 23, which has been impregnated with polyurethane in liquid form, move in the direction of the cylinder 13, where the mixture with the upper side of the cover with the top substrate. The mixture of the fibrous Mat and polyurethane entered into between the upper and lower substrates. In addition to him, may, if desired, be added to the sidewalls of additional valves, which do not allow the polyurethane to flow from these sides. Usually this is not necessary, because the polyurethane flows relatively slowly and hardens rapidly moving in this device.

The mixture of the fibrous Mat 23 and polyurethane moves between continuous tapes 1, 2 and between proishodit foaming and solidification. To the mixture of the fibrous Mat and polyurethane applied pressure is not less than 0.8 and not more than 2 bar within the zone between the belts 1, 2. On the input end 10 does not require special application pressure, but in the second half of the device, i.e. in the portion of the device between the output end 11 and the middle part of the unit should be pressure 1 to 2 bar. Large values of the pressure are not required and can even be unfavorable. When polyurethane foams and hardens between the belts 1, 2, maintain a temperature of not less than 30°C. because the polyurethane is exothermic reaction, in other words when the foaming produces heat, to avoid thermal shock, the pressure plate is heated by radiant heat of the infrared lamps 30, 31, which is schematically shown by the dotted line in figure 1. As for heating, the temperature of the pressing plates not much different from the temperature of foamed polyurethane, which is in the range from 30 to 90°C. the Large temperature differences can cause thermal shock and result in low quality products. Typically, heating of the pressing plates is required only at the beginning of the operation of the device; after the operation of the device for some time the pressure plate reaches the desired temperature, which is supported temperatureincreases polyurethane and which is transmitted to the plates. Instead of heating lamps installed between the gear wheels 5, 6, can be used with other types of heating means. Between the tapes invalid temperature exceeding 100°because high temperatures are undesirable and lead to increased production costs. Substrate 12, 17 is removed from the cured product after it is output from the output end 11. In the future, the sides of the line, and cut the product to the desired length. The weight ratio of fibers and a bonding agent of the finished product is in the range from 0.8 to 2, usually from 1 to 1.3. The density of the foamed polyurethane is from 25 to 100 kg/m3.

As source material for parts with a thickness of 10 mm using a fibrous Mat of a thickness of from 15 to 30 mm For products with a maximum thickness of about 50 mm use fibrous Mat of a thickness of from 70 to 150 mm If the thickness of the final product is 150 mm, use three fibrous Mat of a thickness of from 70 to 150 mm each. In applications where fibrous Mat composed of several layers of fibrous mats), in the manufacturing process to achieve the necessary adhesion between the layers can be applied bonding agent between the layers.

The present invention, described above, is a variation of the embodiment, and from this it follows that the details of this invention may b shall be performed in various ways within the scope of claims described in the claims. Therefore, it can be used as raw materials of other hygroscopic fibers and not of wood fiber. However, the advantage of using wood fiber is to obtain a finished product with good physical and mechanical properties, while production costs remain very low. Instead of polyurethane, you can use the material on the basis of phenol. The speed of drawing in the device may vary, and typically this rate is in the range from 2 to 15 meters per minute. The dimensions of the finished product may also change. May also change the number of spray nozzles: you can use one or more nozzles, which can be both stationary and moving in the direction transverse to the direction of movement of the fibrous Mat 23. Can be used and other options transverse movement of the spray nozzles 24. Instead of using spray nozzles 24 of the binder agent can be fibrous Mat through tubes or one or more grooves. Feeding device for feeding and removing of the substrate 12, 17 may differ in details, such as using different number of cylinders 13 through 16 and 18 through 21. The conveying device need not be mounted on a continuous track, although it can be recomendo the but. The substrate, therefore, can be set in other ways.

1. A method of manufacturing a flat fiber-reinforced composite parts that can be used as a building or packaging material in which fibers are placed on the bottom substrate, causing the fiber foam solidified bonding agent in liquid form so that the fibers were completely covered with a binder agent, serves fibers coated with a binder agent and placed between the upper and lower substrates between the upper and lower pressing plates are continuously moving along the upper side relative to the bottom side of the fibers with a bonding agent, so that the fibers with a bonding agent move with the speed of movement of the pressure plate, allowing the binding agent to foam, expand and harden between the upper and lower pressing plates, and removing the substrate with the hardened product, characterized in that it comprises the following stages: from fibers produced three-dimensional cohesive fibrous Mat by applying a bonding agent on the Mat thickness fibers mainly ranges from 0.5 to 0.8 mm, a width of from 0.3 to 2 mm and a length of at least 80% of the fibers is equal to at least 100 mm, the moisture content of the fibrous Mat before applying a bonding agent is maximally 5%, put masoudi agent on the Mat so to form a mixture of a bonding agent and a fibrous Mat, the mixture contains the fiber close to the upper surface of the Mat, facing to the upper pressing plate and the bottom surface of the Mat, facing to the lower pressing plates, a continuous movement of the mixture of fibers of the Mat with a binder agent is carried out using the upper and lower substrates, between which it is placed, and before removing the substrate mixture is subjected to a pressure of at least 0.8 bar, but not more than, 5 bar, which leads to hardening flat products of thickness from 10 to 150 mm, containing fibers close to the upper surface and the lower surface of the product when moving the mixture between the pressure plates.

2. The method according to claim 1, characterized in that the thickness of the fibrous Mat before applying a bonding agent is approximately 1.5-3 times greater than the thickness of the final product.

3. The method according to claim 1, characterized in that the fibers of the Mat are hygroscopic.

4. The method according to claims 1, 2 or 3, characterized in that the foaming binder is applied on the fibrous Mat, the humidity of which is a maximum of 3%.

5. The method according to claim 1, characterized in that the mixture of fibers and a bonding agent is subjected to pressure from 1 to 2 bar maximum.

6. The method according to claim 1, characterized in that the binder agent used is a material with good adhesive properties.

7. The method according to claim 6, characterized in that the binder agent used polyurethane.

8. The method according to claim 6, characterized in that the binder agent used material based on phenol.

9. The method according to claim 1 or 7, characterized in that the fibers contain wood fibers.

10. The method according to claim 7, characterized in that the fibrous Mat comprising polyurethane, move between the pressure plates at a temperature in the range from 30 to 90°C.

11. The method according to claim 1, characterized in that the binding agent is applied on the fibrous Mat by means of spraying nozzles.

12. Device for the manufacture of flat fiber-reinforced composite parts that can be used as a building or packaging material containing the input end (10) for receiving fibers impregnated with a binder agent, the output end (11) to yield a flat fiber-reinforced composite products made in the device, the top continuously moving tape (1)that contains the number of the upper pressure plate (3)that are managed by at least two longitudinal elements (32)installed in the longitudinal direction relative to the device to allow movement of the upper continuous belt and lower continuously moving band (2), which contains several of the lower pressing plate (4), to the which are controlled, at least two longitudinal elements (32)installed in the longitudinal direction relative to the device to allow movement of the lower continuous belt, with the pressure plate of the upper continuous belt of the working zone of the conveyor to form a first essentially flat surface, and the pressure plate bottom continuous belt of the working zone of the conveyor to form a second essentially flat surface parallel to the first flat surface, these upper and lower pressing plate is made to move between fibers, impregnated with a bonding agent applying means (13, 16, 18 and 21) for filing the top of the substrate (12) and lower substrate (17) into the specified area at the top of the substrate (12) in this zone is pressed against the upper pressure plate (3) and moves with the speed of movement of the upper pressing plate and the bottom surface (17) in this zone is pressed against the lower pressing plates (4) and moves with the speed of movement of the lower pressing plates, and a discharge means (14, 15, 19 and 20) to remove the upper and lower substrates (17) from the flat composite products made in the device, the receiving means (24) from an input end for receiving fibers comprising a binder agent in liquid form on the lower substrate (17), and the heating means (30, 31) for heating the mixture in the window with a bonding agent, characterized in that the length of the specified working area is from 5 to 30 m, and the width is from 1 to 5 m, the device includes a pressing means (9) for a pressure of at least 0.8 bar on the pressure plate (3, 4), the upper pressure plate (3) mounted at a distance of from 10 to 150 mm from the bottom of the pressing plate (4), and specified feed means continuously moving the upper substrate (12) and lower substrate (17) in a closed path.

13. The device according to item 12, wherein the pressure plate (3, 4) form a flat surface facing the substrate (16, 17), and include exciting elements (38), interacting with elements of continuous motion (35) of the feeding means, which are operated controls (32).

14. The device according to item 12, wherein the upper and lower substrates are made of polyurethane film.

15. The device according to item 12, wherein the means include receiving at least one spray nozzle (24)is made with the possibility of reciprocating movement in a transverse direction with respect to the longitudinal direction of the device.

16. The device according to item 12, characterized in that the heating means (30, 31) contain heaters for heating the upper and lower pressing plates (3, 4) to a temperature in the pre is Elah from 30 to 100° C.

17. Flat reinforced fiber composite hard product containing fibers, surrounded by a linking agent that can be used as a building or a packing material in which the fibers are close to the top and bottom surfaces of the product, characterized in that the fibers form a cohesive three-dimensional Mat, the thickness of the fibers in generally ranges from 0.5 to 0.8 mm, a width of from 0.3 to 2 mm and a length of at least 80% of the fibers is equal to at least 100 mm, the weight ratio of fiber to binder agent is from 0.8 to 2, and the thickness of flat products is from 10 to 150 mm

18. Flat reinforced fibre composite product according to 17, characterized in that the binding agent is polyurethane.

19. Flat reinforced fibre composite product according p, characterized in that the product is made without coverage.



 

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The invention relates to the field of process equipment, particularly to presses of General purpose and can be used in lines for the manufacture of plastic edging, used in furniture manufacturing

FIELD: electrical communication components; cables whose conductors are covered with polymeric insulation extruded about conductor.

SUBSTANCE: proposed cable has its conductors covered with insulation that has at least one component incorporating maximum 20, and best of all 15, mass percent of polymer characterized in high degree of extrudate swelling. This polymer is defined as that characterized in extrudate swelling degree over 55% and higher, best of all that having extrudate swelling degree over 65%. Best insulation has at least second component of high degree of cracking resistance under stress; therefore, minimal combination of these polymers will provide for insulation layer possessing unique combination of physical properties, including high degree of foaming, fine uniform cellular structure, reduced attenuation, and cracking resistance under stress which is capable of sustaining temperature of 100 °C over 100 h without cracking in spirally coiled state at stress level one-fold higher than outer diameter of insulation.

EFFECT: improved electrical characteristics and mechanical strength of insulation.

23 cl, 6 dwg, 3 tbl

FIELD: electrical communication components; cables whose conductors are covered with polymeric insulation extruded about conductor.

SUBSTANCE: proposed cable has its conductors covered with insulation that has at least one component incorporating maximum 20, and best of all 15, mass percent of polymer characterized in high degree of extrudate swelling. This polymer is defined as that characterized in extrudate swelling degree over 55% and higher, best of all that having extrudate swelling degree over 65%. Best insulation has at least second component of high degree of cracking resistance under stress; therefore, minimal combination of these polymers will provide for insulation layer possessing unique combination of physical properties, including high degree of foaming, fine uniform cellular structure, reduced attenuation, and cracking resistance under stress which is capable of sustaining temperature of 100 °C over 100 h without cracking in spirally coiled state at stress level one-fold higher than outer diameter of insulation.

EFFECT: improved electrical characteristics and mechanical strength of insulation.

23 cl, 6 dwg, 3 tbl

FIELD: process for manufacture of flat fiber-reinforced composite article which may be used as construction or packaging material.

SUBSTANCE: method involves placing fibers on lower substrate; applying liquid foam hardening binding agent onto fibers so as to completely coat fibers with binding agent; feeding fibers coated with binding agent and positioned between upper and lower substrates into space between upper and lower pressing plates continuously movable on upper side relative to lower side of fibers with binding agent, with fibers coated with binding agent moving at the velocity of pressing plates allowing binding agent to be foamed, expanded and hardened between upper and lower pressing plates; removing substrates from hardened article. Method further involves manufacturing cohesion fibrous mat from fibers. Before applying of binding agent onto mat, thickness of fibers makes from about 0.5 mm to about 0.8 mm, width - from 0.3 mm to 2 mm, and length of at least 80% of fibers makes at least 100 mm, moisture content of fibrous mat before application of binding agent is at least 5%. Method further involves applying binding agent onto mat so as to form mixture of binding agent and fibrous mat. Mixture contains fibers close to upper surface of mat, said surface facing upper pressing plates, and to lower surface of mat facing lower pressing plates. Mixture of mat fibers and binding agent is moved by means of upper and lower substrates between which said mixture is positioned. Before removal of substrates, mixture is exposed to pressure of from at least 0.8 bar but not in the excess of 5 bar to result in hardening of flat article having thickness of from about 10 mm to about 150 mm. Also described are apparatus for manufacture of flat fiber-reinforced composite article and flat fiber-reinforced composite rigid article.

EFFECT: minimized manufacture costs and improved quality of article having stable shape.

19 cl, 6 dwg

FIELD: manufacturing heat-insulated pipes.

SUBSTANCE: method comprises manufacturing pipe that is composed of one or several inner pipes, outer pipe that is mounted concentrically and with a spaced relation to the inner pipe, and insulation that is mounted within the space between the inner and outer pipes and is made on the basis of polyurethane or polyisocyanurate foams.

EFFECT: reduced cost and improved heat insulation.

5 cl, 2 dwg

FIELD: chemistry.

SUBSTANCE: foamed material consists of a single-component, moisture-curable composition containing at least one polymer P, having isocyanate groups and/or alkoxy silane groups, 10-60 vol. % of at least one gas and 10-30 wt % soot per total weight of the single-component foamed material which is curable in a moist medium. Application of the obtained foamed material is carried out primarily at temperature in the range of 10-40C. The degree of foaming of the composition and, consequently, gas content of the single-component, moisture-curable foamed material varies during its application.

EFFECT: obtaining single-component, moisture-curable foamed material which can be used as an adhesive or a sealant/packing material for producing coatings or filling hollow structures with foamed material, particularly vehicles.

20 cl, 4 dwg, 1 ex

FIELD: process engineering.

SUBSTANCE: invention may be used for production of long sheet reinforced fluoroplastic billets for friction assembly operated without lubrication. Polydisposed polymer film is produced from fluoroplastic-4 or from compositions based thereon. Strip mesh power are filled by said film by rolling said film on both sides. Produced sheets are wound on rolls to be fitted in limiting mandrels with no clearance. Billets are sintered at 643-653 K and pressure developed by expansion of fluoroplastic-4 and cooled down thereafter. Billets are withdrawn from mandrels and passed through rolls.

EFFECT: simplified procedure, expanded range of products.

2 ex

FIELD: process engineering.

SUBSTANCE: invention relates to production of crimped heat-insulated pipeline. Pipeline comprises at least one inner pipe, crimped outer pipe spaced therefrom and made of synthetic material and a ply of foamed synthetic material to fill the spacing between both pipes. First, ply of foam is applied to inner pipe to extrude outer pipe thereat. After extrusion of outer pipe, forming tools are used to make crimps on foam ply.

EFFECT: higher flexibility of pipe.

15 cl, 3 dwg

FIELD: process for manufacture of flat fiber-reinforced composite article which may be used as construction or packaging material.

SUBSTANCE: method involves placing fibers on lower substrate; applying liquid foam hardening binding agent onto fibers so as to completely coat fibers with binding agent; feeding fibers coated with binding agent and positioned between upper and lower substrates into space between upper and lower pressing plates continuously movable on upper side relative to lower side of fibers with binding agent, with fibers coated with binding agent moving at the velocity of pressing plates allowing binding agent to be foamed, expanded and hardened between upper and lower pressing plates; removing substrates from hardened article. Method further involves manufacturing cohesion fibrous mat from fibers. Before applying of binding agent onto mat, thickness of fibers makes from about 0.5 mm to about 0.8 mm, width - from 0.3 mm to 2 mm, and length of at least 80% of fibers makes at least 100 mm, moisture content of fibrous mat before application of binding agent is at least 5%. Method further involves applying binding agent onto mat so as to form mixture of binding agent and fibrous mat. Mixture contains fibers close to upper surface of mat, said surface facing upper pressing plates, and to lower surface of mat facing lower pressing plates. Mixture of mat fibers and binding agent is moved by means of upper and lower substrates between which said mixture is positioned. Before removal of substrates, mixture is exposed to pressure of from at least 0.8 bar but not in the excess of 5 bar to result in hardening of flat article having thickness of from about 10 mm to about 150 mm. Also described are apparatus for manufacture of flat fiber-reinforced composite article and flat fiber-reinforced composite rigid article.

EFFECT: minimized manufacture costs and improved quality of article having stable shape.

19 cl, 6 dwg

Press // 2319613

FIELD: press engineering.

SUBSTANCE: press comprises at least one circulating pressing belt and means for control of trajectory of the pressing belt. The control means have rollers and members for positioning the rollers with an inclination to the direction of movement of the pressing belt. The rollers are mounted to the circulating chains at the side. The press is provided with members for control of position of the rollers depending on the length of the individual links of the circulating chains.

EFFECT: improved design.

7 cl, 5 dwg

FIELD: construction.

SUBSTANCE: invention is related to construction branch of industry, in particular to manufacture of panels of "sandwich" type used as external envelopes of buildings and structures. Method includes turn of bar from previously cut mineral wool plate with width equal to panel thickness around its longitudinal axis by 90°. Bar is placed on delivery table. Additionally prior to cladding layer of mineral wool heat insulation material is treated by single-component glue along its whole width. Process of glue polymerisation is intensified by means of water supply into area of glue supply. Then carpet of mineral wool heat insulation material treated with glue is covered with foam polystyrene and passed through pressing rollers. After that combined carpet is sent to milling unit, where disk cutter is used to give required width to the carpet with strictly vertical longitudinal end perpendicular to panel plane. Then one bar with thickness equal to panel thickness is placed on both sides of carpet. Produced carpet is clad with galvanised metal on both sides.

EFFECT: creation of method for manufacture of "sandwich" type panels with combined heat insulation material, with higher heat insulation and strength characteristics.

2 dwg, 1 tbl

FIELD: ceramic industry.

SUBSTANCE: invention relates to powder material compaction and can be used during ceramic tiles moulding. Powder material layer pressing device comprises transfer surface, located below it pressing surface and flexible pressing surface. Latter is installed with transfer surface overlapping. Device includes pressing facilities, made with possibility to press pressing surface against transfer surface, as well as flexible and resilient pliable facility to hold powder material layer in transverse direction. Layer expansion compensation is provided by facilities, located after pressing facilities in powder material layer movement direction. Said compensation facilities are separated from pressing facilities and comprise lower and upper plates. Upper plate has at least three pistons, each of which is located in direct contact with upper pressing surface and connected with control unit. Latter performs independent control over each piston, acting with differential pressure.

EFFECT: result is provision of compensation pressure constant value applied to layer along entire width of powder material layer.

14 cl, 5 dwg

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