Method for making mats from material and device for implementing method

FIELD: construction.

SUBSTANCE: in device for implementing method of making mats from material, containing lignocellulose, mat is designed for making at least, one plate. Ground material containing lignocellulose is put into a feeding device, and from this device, the stream of material flows into a mould, which has at least, one moulding belt. The feeding device is put at a level higher than the mould. At least one guide surface is installed, which passes from the feeding device to the mould, and material is transported from the feeding device to the mould by supplying the material down along this guide surface.

EFFECT: invention allows controlling flow of material from feeding device to mould.

24 cl, 6 dwg

 

The technical field to which the invention relates

The present invention relates to a method of forming a Mat of the material containing lignocellulose, and the Mat is intended for manufacturing of him at least one plate, where the crushed material containing lignocellulose, serves to nourish skin, and from it - in the form of a flow material in a forming tool, containing at least one forming the tape, and the supply means is located at a higher level than the forming tool, and device for implementing this method.

Prerequisites to the creation of inventions

In the manufacture of slabs of material containing lignocellulose, such as chipboard and fiberboard using a dry method (MDF medium density, HDF high density, LDF low density and so on), the first material containing lignocellulose, crushed into particles or bundles of fibers. They are then dried and covered with glue, and form from them a continuous Mat on one or more stations of the formation. Mat pre-press, and then finally pressed into the plate under pressure and by heating in a continuous or periodically operating the press.

The material containing lignocellulose can be blended with other materials such as plastic and, the waste paper, glass, crushed minerals and so on, until the formation process or during the process of formation. In the manufacture of plates it is important that they have homogeneous properties over the entire surface of the plate. These properties include, in particular, thickness, tensile strength in the transverse direction, bending strength and fracture, the ability to staining. Since these properties depend on the density of the plate, it is important that formation occurred with high accuracy, so that the density of the plate was the same across the surface of the plate. To achieve this, during the process of formation of particles or fiber bundles should be distributed as much as possible homogeneous both in longitudinal and in the transverse direction across the surface of the formation.

Conventional forming equipment for forming slabs of material containing lignocellulose, is often mechanical. This equipment includes at least one supply means comprising a metering hopper or dosing container in which the material is stored at an intermediate stage, and then dosed drop down, providing free drop on the forming tool, where the material is deposited to form the tape, i.e. on a conveyor belt. Then, in the manufacture of drevesnovoloknistoyj the plates often after their formation using the rough shaft whereby preservat all the irregularities on the surface of the Mat to increase the accuracy of the formation.

A disadvantage of conventional forming equipment is that the material during its free fall between the supply means and forming means can be easily subjected to the harmful effects of the surrounding air flows in both longitudinal and transverse directions, the result of which can disrupt the accuracy of the formation. Free drop in those cases where this problem occurs is, as mentioned above, during the fall between the supply means and the forming means with the shaft forming means for forming the canvas, and it also depends on the machine type.

During the free fall of material flow in the air there are two unusual phenomena. First, as was previously known, the stream of material falling freely in the air, has a tendency to compound and the formation of multiple jets of material. This tendency increases with increasing drop height. Secondly, there is the impact ejected together airflow and a slowdown or disruption of the air flow. These air flows are pulling an elongated material, as well as do mine, surrounding the flow of material opaque because of the material floating around.

Previously known is the fair way to reduce the influence of free fall from the trees, set about forming the tape, forming the so-called shaft down to form the tape was installing these forming rolls can be moved in the vertical direction, so that these form the shafts were always located near the formed Mat. In the Swedish patent SE511259 described, for example, the way in which these shafts are close to the Mat, and the problem with the free fall with these shafts, set about forming the tape down onto the shaping ribbon, were excluded. However, the problem associated with the free fall of the feeding means on the forming tool, remains unresolved.

The purpose of the invention

The aim of the present invention is the elimination or at least minimize the impact of problems associated with the lack of homogeneity of the formed Mat arising due to the influence of uncontrolled air flows freely slow fall of material from the supply means to the forming means as described above, and as a result of other influences on the free falling stream of material from the supply means to the forming means. In addition, the present invention is to solve additional problems mentioned above.

Brief description of the invention

The solution of this and the finding is to provide a method and device, providing, when it is used, the radical improvement of the process of formation, as defined in the preamble p. 1 formula of the invention in carrying out special measures consisting in the provision of at least one guide surface, available from the supply means to the forming means, and that the transportation of the material from the supply means to the forming means is accomplished by the flow of material down along the guide surface. By filing down the flow of material along the guide surface, essentially along the entire distance between these means, air flow and material flow are separated from each other, resulting ensure a controlled flow of material from one tool to another. Controlled material flow, in turn, allows for increased homogeneity of the formed Mat and, thus, improved homogeneity of the finished plate.

According to a preferred embodiment of the method in accordance with the present invention, the material flow is slowed and deflected in the direction to the horizontal surface of the forming fabric when approaching the forming tool.

According to an additional preferred embodiment of the method in accordance with h is a worthwhile invention the width of the material flow control to the forming means. This way you can provide a flexible and simple adjustment of the width of the formed Mat.

According to another preferred embodiment of the method in accordance with the present invention, the material flow regulating in the transverse direction by moving the adjustable transverse adjusting means in the flow of material, and these tools come in the flow of material and turn mentioned means relative to the direction of flow of the material. Thanks to this improved homogeneous properties of the formed Mat.

According to another preferred embodiment of the method in accordance with the present invention control the distribution of material in the direction transverse to the direction of material flow. The purpose of this regulation is also increasing the homogeneity properties of the formed Mat.

According to a preferred embodiment of the method in accordance with the present invention, the material serves to supply means, having a second guide surface, by applying the above-mentioned material down along the second guide surface of the feeding means, therefore here also provide a controlled flow of material. This variant of the method according to the present invention can is about to carry out independently and separately from the method according to the present invention, including supply of material from the supply means to the forming means, and it additionally contains one or more special measures carried out according to the method in accordance with the present invention for conveying material from the supply means to the forming means.

In addition, according to the present invention a device for forming a Mat of the material containing lignocellulose, and the Mat is intended for the manufacture of at least one plate, the device comprises a feeding means and forming means at least one forming fabric, and the crushed material containing lignocellulose, served in the supply means, and then to the forming means in the form of material flow, and the supply means include at a higher level than the forming tool, and the device comprises at least one guide surface extending from the supply means to the forming means, and guide surface adapted for transportation of material from the supply means to the forming tool by submitting material down along the guide surface, whereby to provide a controlled flow of material from one tool to another.

According to alternatives of the execution direction of the Commissioner, the surface of the device in accordance with the present invention this guide surface includes a conveyor belt, roller or plate slip. In the case of plates sliding force of gravity causes a downward movement of the material flow, whereas in the case of using the roller bed or conveyor belt, their operating speed provides a downward flow of material. The sliding plate may contain several installed next to each other of the plates.

According to a preferred embodiment of a device made in accordance with the present invention forming tool comprises at least one means for podregulirovan speed, through which pass the material prior to its installation onto the shaping ribbon is designed in such a way as to bring the speed of the material to the forming speed of the tape. Device for podregulirovan speed contains, for example, scattering the shaft, preferably installed with the ability to regulate its location in the vertical direction.

According to an additional preferred embodiment of a device made in accordance with the present invention, means are provided to regulate the width adapted to the width control, flow of material to the forming means and located along at least one of the longitudinal edges of the guide n the surface.

According to another preferred embodiment of the device made in accordance with the present invention, is provided by adjustable side regulating means adapted to regulate the sides of the stream of material to be installed in the material flow, and lateral adjustment means is installed with the possibility of moving in the material flow and rotation relative to the direction of material flow.

According to another preferred embodiment of the device made in accordance with the present invention, means are provided for distribution of the material adapted to regulate the distribution of material in the direction transverse to the direction of flow of the material located around the guide surface.

According to a preferred embodiment of a device made in accordance with the present invention, there is a second guide surface for feeding material to the feeding means through the submission of the above material down along the second guide surface of the feeding means, therefore here also provide a controlled flow of material. This embodiment may optionally contain one or more special funds, according to the us is oasea the invention, to supply material from the supply means to the forming means.

In addition, according to the present invention results from the method of manufacture of plates of material containing lignocellulose, and the method comprises a stage of forming a Mat of crushed material mentioned in any one of claims 1 to 8 claims.

According to the present invention also created an installation for the production of plates made of the material containing lignocellulose, and the installation includes a device for forming a Mat mentioned in any of PP-22 claims.

In this way we perform a method of formation of the Mat, and, accordingly, the design of the installation for the production of plates provide the aforementioned advantages.

As mentioned above, when considering the background to the creation of the invention, the material should not be attributed only to the material containing lignocellulose, because there is also the ability to add any materials, such as plastics, paper, glass, crushed minerals, etc. Material may be of various sizes and shapes and, for example, may include fiber and/or fiber bundles.

Other preferred variants of the present invention will become apparent when reading the accompanying claims.

Brief description of drawings

<> The present invention is described below in more detail based on examples of embodiments and with reference to the accompanying drawings, on which:

Figure 1 depicts a schematic view of a conventional mechanical forming equipment for the production of plates;

Figure 2 is a side view of the version of the guide surface according to the present invention;

Figure 3 is a side view of the version of the guide surface with means for regulating the width according to the present invention;

4 is a side view of the version of the guide surface with means for lateral control according to the present invention;

5 is a side view of the version of the guide surface with means for distributing material according to the present invention;

6 is a schematic view of a mechanical forming station for the production of plates with the second guide surface, set by the supply means.

Description of the preferred options

Figure 1 shows a conventional forming equipment for the production of plates. Material fed through the inlet 1 to the feeding means 4, which is here made in the form of a metering hopper. The supply means 4 includes an upper adipose back the equipment 2 through which the material submitted earlier in the bunker, occiput the right in the supply means; the discharge rollers 3 and the lower conveyor belt 5, which feed the material to the left to release the feeding means 4. After passage of the material through the outlet shafts 3 and he falls down into the region of the shaft 6, and may then fall directly down onto the shaping belt 7 or the roller 9 located at the forming station 8, and forming station 8 form a Mat. The weight of the Mat constantly check with by using weights 10, and the data from the scale 10 is used to regulate the speed of the lower conveyor belt 5. The side edges of the Mat support side walls 11 to the entrance Mat in pre-press 12.

Figure 2 shows the area of the shaft 206, where the guide surface 14 made according to the present invention and passing from the supply means to the forming means 200. The term "forming tool" here used as a generic term for all the various parts and tools that can be used for the formation of the Mat, for example, forming the tape, shafts forming station, scales, etc. of the lower conveyor belt 205 feeding device is driven by a drive shaft 13. The upper edge of the guide surface 14, which here contains a sliding plate, but may also include a conveyor belt or roller conveyor, is located near and just below the horizontal plane passing chere is C the center of rotation of the drive shaft 13. In these cases, the supply means includes a so-called split shafts containing two shafts rotate in opposite directions with different speeds, usually located directly under the drive shaft 13, and the edge of the upper part of the guide surface 14 have under split shaft with a higher speed. In those cases, when the feeding means is located so as feeding means 4 to 1, a split shaft having higher speed, have the most close to the lower conveyor belt 205 feeding means in comparison with other split shaft. In those cases, when the supply device is mounted in reverse order relative to the position of the feeding means 4 in figure 1 and is located above the forming station 8 in figure 1 and its output to the forming tool 200 is turned to the right in figure 1, the split shaft with a higher speed feature in the forward position from the lower conveyor belt 205 feeding means in comparison with the other split shaft. The material supplied from the supply means to the upper portion of the sliding plate 14, which is inclined and forms an angle with the vertical, component of 15-35°, preferably 20-30°in order to catch and slow the movement of material from the supply means, the best way. When mA is Arial collides with the sliding plate 14, he is separated from accompanying the ejected air, and the flow of material in the form of a relatively thin layer slides down along the sliding plate 14, which further down and closer to the forming tool 200 is provided with a rounded surface, the surface preferably contains a fillet having a radius average of 500-800 (mm). Due to this rounding is further slowing the flow of material and the deviation of the flow of material toward the horizontal plane. The stream of material comes off the sliding plate 14 and passes through the means for podregulirovan speed, located in the forming tool 200 and is made in the form of the scattering of the shaft 15, which additionally will readjust the flow rate of material to the speed of the forming belt 207. Scattering shaft 15 is installed with the ability to regulate its position in the vertical direction and rotate clockwise (as shown in figure 2 position) with angular velocity adapted to form the ribbon 207 thus, in order to match the thickness of the Mat to form the ribbon 207 after the scattering of the shaft 15. Forming tape 207 in this figure is shown moving to the left for further transportation of the Mat to the following nodes forming means 200, where the Mat giving it a final shape. spymania showed what if they do not use the scattering shaft 15 is formed wave-like pattern in the longitudinal direction of the Mat, resulting in oscillations of the density of the Mat. Preferably, the distance in the horizontal direction between the lower edge of the sliding plate 14 and the outer surface of the scattering of the shaft 15 was as short as possible and was 10-150 mm, and more preferably 20-100 mm Scattering shaft 15 has a hole in cross-section, whereby to provide a passage through the material at an appropriate speed. Together the ejected air is deflected upwards and backwards and he reported recycling movement. The position of the lower edge of the sliding plate 14, and the position of the scattering of the shaft 15, can be adjusted in the vertical direction. This is achieved, for example, by dividing the sliding plate 14 into two parts, with the lower part move relative to the upper part and slightly turn.

Figure 3 shows the lower conveyor belt 305 made in the feeding means, which drives a drive shaft 313, and the left upper slide pads 314. Means are provided for regulating the width, containing the lifting plate 17, the upper edge of which is tightly pressed against the sliding plate 314 so that it has captured material is of material flow, served down along the longitudinal sides of the sliding plate 314. Lifting plate 17 forms in the appropriate place greater angle with the vertical plane than the sliding plate 314, and thus provide a lifting material captured from the stream of material. In addition, means are provided for controlling the width of the containing guide plate 18, and the captured material with a lifting plate 17 hits the guide plate 18, through which diffuse material towards the middle of the stream of material and the dispersion material is produced on top of a regular flow of material when the guide plate 18 installed at a distance from the sliding plate 314. Preferably, the guide plate 18 has formed an angle of approximately 45°but this angle may be changed to achieve the required distance transfers of material. Guide plate 18 can be provided with an alignment profiles to improve the supply of captured material in the direction of the middle of the material flow. The position of the lifting plate 17 and the guide plate 18 is continuously adjust to provide constant control of the width of the material flow.

Figure 4 shows a conveyor belt 405, installed in the supply device, which drive the t in the movement of the drive shaft 413, and the upper part of the sliding plate 414. On the front wall 21 of the mine installed with adjustable lateral control devices, which contain the guide beam 20 that is supported by the rod 19. The rod 19 can be moved in the longitudinal direction of the rod so that the guide beam 20 were linked at different depths with the flow of material along the sliding plate 414, and can be rotated so as to rotate the guide beam 20 relative to the direction of material flow. If you have multiple guide bars 20, they are preferably placed in the transverse direction at a certain position relative to each other, across the width of the sliding plate 414.

Figure 5 shows the fall of material from the supply means containing the lower conveyor belt 505 driven drive shaft 513, the sliding plate 514, which produce a relatively thin stream of material 22. Above the sliding plate 514 is installed in the transverse direction of the sliding plate 514 funds for distribution of material containing the alignment shaft 24, and the distance from the alignment shaft 24 to slide pads 514 preferably make adjustable to provide the required distance 23 between the alignment shaft 24 and the sliding plate 514. Tests have shown that the use of the alignment shaft 24 can improve and equalize the distribution of material in the transverse direction of the sliding plate 514. The alignment shaft 24 can be performed in a known manner, for example, with pins, blades, plates, etc. in order to achieve distributive effect. The alignment shaft 24 rotate with a higher angular velocity than the flow rate of material, and it can be rotated in both directions, but preferably the alignment shaft 24 rotates in the direction of material flow. The position of the alignment shaft 24 relative to the sliding plate 514, which determine the distance of 23, can be adjusted by moving it parallel to the sliding plate 514, or each end of the alignment shaft 24 can be moved relative to the sliding plate 514 to achieve the desired effect alignment.

Figure 6 shows a portion of the forming equipment for the production of plates. Material fed through the inlet 601 of the supply means 604, and the inlet 601 includes means 25 for dispensing width, for example, in the form of a pendulum nozzle through which the metered material, which serves to feed the tool along its width. Supply means 604 contains the upper adipose back the equipment 602, exhaust shafts 603 and the lower conveyor belt 605. In the inlet 601 under the means 25 for dispensing width is the second guide surface 26 that contains a sliding plate, but it can soda is to press the conveyor belt or roller conveyor, the second guide surface 26 is made to present the material to the feeding means 604 by filing down the mentioned material along the second guide surface 26 in the supply means 604, whereby here also provide a controlled flow of material. The second guide surface 26 may contain one or a few special tools typical of the guide surface made according to the present invention, inserted between the supply means and forming means, and can be used without and independently of this surface. It is preferable that the inlet feed means other variants contained means 25 for dispensing width, but you don't have to use this second guide surface 26.

1. The method of forming a Mat of the material containing lignocellulose in which the Mat is designed to generate at least one plate and in which the crushed material containing lignocellulose, serves to supply the means, and this feeding means is served in the form of a flow material in a forming tool, containing at least one forming the tape, and the supply means include at a higher level than the forming tool, wherein the set m is Nisha least one guide surface, which passes from the supply means to the forming means, and the fact that the transportation of the material from the supply means to the forming means is accomplished by the flow of material down along the guide surface, whereby to provide a controlled flow of material from the supply means to the forming means.

2. The method according to claim 1, characterized in that the material flow slows down, and turned to the horizontal plane forming the tape when approaching it to the forming tool.

3. The method according to claim 1 or 2, characterized in that regulate the width of the stream of material to the forming tools.

4. The method according to claim 3, characterized in that regulate the width of the material flow by raising the material to a higher level relative to the guide surface of at least one of the longitudinal sides of the guide surface, and the subsequent direction and distribution of the material to the middle of the stream of material by means of adjustable width controls.

5. The method of claim 1, characterized in that provided by the regulation in the transverse direction of the material flow by moving the adjustable managed cross tools in the flow of material, and these tools come in the flow of material and turn mentioned means relative who entrusted the direction of material flow.

6. The method according to claim 1, characterized in that control the distribution of material in the direction transverse to the direction of material flow.

7. The method according to claim 6, characterized in that regulate the distribution of material in the direction transverse to the direction of flow of material through the alignment of the shaft located in the transverse direction of the guide surface mating with the thread of the material and is preferably driven at a higher angular velocity than the flow rate of the material.

8. The method according to claim 1, characterized in that the material serves to supply means of the second guide surface by feeding the above-mentioned material down along the second guide surface of the feeding means, whereby here also provide a controlled flow of material.

9. Apparatus for forming a Mat of the material containing lignocellulose, and the Mat is designed to generate at least one plate containing the supply means and forming means with at least one forming the tape, while the crushed material containing lignocellulose, served in the supply means, and then to the forming tool in the form of a stream of material, and the feeding device is located at a higher level than forming device, otlichayas the same time, it contains at least one guide surface extending from the supply means to the forming means, and a guide surface adapted for the transportation of material from the supply means to the forming tool by submitting material down along the guide surface, whereby also provide a controlled flow of material from the supply means to the forming means.

10. The device according to claim 9, characterized in that the guide surface includes a plate sliding along which material serves down to the forming tool.

11. The device according to claim 9, characterized in that the guide surface includes a roller conveyor on which the material serves down to the forming tool.

12. The device according to claim 9, characterized in that the guide surface includes a conveyor belt on which the material serves down to the forming tool.

13. Device according to any one of p-12, characterized in that the upper part of the guide surface forms an angle with a vertical plane, comprising 15-35°and preferably 20-30°.

14. The device according to claim 9, characterized in that the lower part of the guide surface forms a rounded surface, and this surface preferably contains a fillet having a radius of 500-800 mm

15. Device is istwo according to claim 9, wherein the forming tool comprises at least one means for podregulirovan speed, through which the material passes before it is placed on a forming belt to adjust the speed of the material to the forming speed of the tape.

16. The device according to item 15, wherein the means for podregulirovan speed contains scattering shaft, which is preferably installed with the ability to regulate its position in the vertical direction.

17. The device according to claim 9, characterized in that means are provided to regulate the width adapted to the width control, flow of material to the forming device along at least one longitudinal side of the guide surface.

18. The device according to 17, characterized in that the means for regulating the width contain at least one lifting plate, which is adapted to lift the material at least near one longitudinal side of the guide surface to a higher level relative to the guide surface and at least one guide plate, adapted to the future direction and distribution of the material to the middle of the stream of material.

19. The device according to claim 9, characterized in that is provided by adjustable on arachnae adjusting means for adjustment in the transverse direction, adapted to regulate the flow of material in the transverse direction, located in the material flow, and adjustable transverse adjusting means is installed with the possibility of moving in the material flow and rotation relative to the direction of material flow.

20. The device according to claim 9, characterized in that the means for distribution of the material, adapted to control distribution of the material in the direction transverse to the direction of flow of the material is installed around the guide surface.

21. The device according to claim 20, characterized in that the means for distribution of material contain a leveling shaft, mounted in a transverse direction relative to the guide surface, and the distance between the alignment shaft and the guide surface preferably make adjustable.

22. The device according to claim 9, characterized in that there is a second guide surface for feeding material to the feeding device by feeding the above-mentioned material down along the second guide surface of the feeding means, whereby here also provide a controlled flow of material.

23. The method of manufacture of plates of material containing lignocellulose, including the formation of a Mat of crushed material, featuring the the action scene, the formation of the Mat is carried out in accordance with the method according to any one of claims 1 to 8.

24. Installation for the production of plates made of the material containing lignocellulose containing apparatus for forming a Mat, wherein said device is a device according to any one of p-22.



 

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