Method of blow moulding of plastic article and mould to this end
FIELD: process engineering.
SUBSTANCE: invention relates to production of plastic articles. Proposed method comprises the stages described below: extrusion of hose workpiece; melt flow separation inside extrusion die or cutting of extruded piece to obtain workpiece of approximately C-like shape and deformation of workpiece inside said die for blow moulding with application of pressure difference to hollow body. Proposed method differs from known processes in that, first, workpiece is expanded and pre-deformed in partially closed die. Then, at least one add-in part is arranged between parts of partially close die via workpiece open side inside said partially moulded article to close the die completely. Note here that said article of completely formed to obtain at least partially enveloping flattened seal. Mould closure is made in two steps. Note also that at first step, at least one plunger, preferably, several plungers fitted in die cavities make the front face parts of the die squeeze the workpiece to make at least one hole there between. Invention covers also the method of blow moulding.
EFFECT: lower costs, perfected configuration.
16 cl, 7 dwg
In particular, in the manufacture of large plastic containers by extrusion blow molding is often desirable to place in the manufacturing capacity of embedded items. For example, thermoplastic fuel tanks of vehicles are often equipped with functional embedded items, which either after manufacturing capacity manually placed through one or more inspection openings therein, either during the molding containers by extrusion blow molding surrounded it. For this purpose, it is known that placing embedded items are placed on the mandrel/holder and located between the open halves of the molds for blow molding so that the extruded with it the sleeve blank of thermoplastic extruded on the holder and located on the details. When the sleeve is put on the holder of the functional parts and functional parts. Then the mold halves are closed around the holder and placed on its functional parts. The holder of the functional parts can be welded with the wall for future capacity. On the next operation of the bag blank is dealt within the form. This method is known for example from DE 60218237 T2. Known for blowing capacity around embedded parts on the principle of "ship in a bottle" is used, in particular, and that is Yes, when placed in a container embedded items more under her inspection openings.
In particular, the problem thermoplastic fuel tanks is that the plastics used for them, usually HDPE, are not diffusion-tight for hydrocarbons. Therefore, modern thermoplastic fuel tanks are made of coextruded with barrier layers for hydrocarbons. Thus, it is possible in most largely to ensure the integrity of the system "fuel tank", which, however, the barrier layer is disrupted/interrupted subsequently executed holes in the wall of the tank, so that the area of microsec and/or holes in the wall there potential leaks of volatile hydrocarbons.
In recent years more and aspirations are directed to, if possible, all embedded items to put in the fuel tank is already in the process of manufacture and to maintain a minimum number of holes in its wall.
The so-called blowing around embedded parts eliminates, however, the problem regarding the magnitude of the necessary holes in the wall of the tank, however, follow some of the embedded components, such as valves and the like, requires, under certain circumstances, violation of the integrity of its walls in the sense of penetration, so that the number of mu is necessary holes due to this is not significantly reduced.
In EP 1110697 B1 a method is proposed in which emerging from the extrusion head extrudate of the closed section is cut from two diametrically opposite sides, resulting in two preparations in the form of paintings, which are sent through the sending device and prior to its formation are held at a distance from each other, while between the two is entered accessory designed to accommodate future capacity.
In particular, in relation to the available space for manipulating embedded details of this method relative to the optimum, however, requires a high equipment costs for doing more plastic in the hot condition of the extrudates. In addition, the application of this method is limited to fixed spatial location of the extrusion head relative to the mold for molding blow.
From JP 5605113333 And a method of manufacturing plastic articles in accordance with the restrictive part of claim 1 of the formula. A similar method is known from, for example, JP 11254511 A.
The basis of the invention lies in the task of creating a method in accordance with the restrictive part of claim 1 of the formula that would place the embedded parts in plastic product without increasing hardware costs and which would not be limited spatial not dignim location of the extrusion head relative to the mold for molding blow.
This problem is solved by the characteristics of claim 1 of the formula, and the preferred embodiments of the method are given in dependent clauses.
The form for molding blow in the sense of the invention refers to a form that contains at least two mold halves with each cavity, which in the fully closed state form a socket for the product to be cast. The mold halves can be placed on the clamping plates and can be made integral or composite. They may contain a known manner plungers for demolding of pagnutti etc. In the framework of the invention form may also have more than two moved in relation to each other parts, and for simplicity below, the term "half-mold".
The proposed method has in particular the advantage that it is already almost full (partial) forming the blank occurs in the first stage, when not fully closed form. Due to the fact that the sleeve on the one hand is open (cut), not between a fully closed half-form by means of the manipulator inside the manufactured containers are placed one or more deposited or embedded parts and are fastened there, for example, by welding with more plastic in the hot condition the container wall.
In the proposed method provided by the deformation and shaping of the extrudate for the first W is R", i.e. without further heating, and it is possible partial heating placing embedded items and/or the vessel wall in the welding zone embedded items with the container wall to improve the welded connection.
Using plungers/front face of the workpiece, forming a prechamber, is clamped between the first front face parts. Then the workpiece is applied to the cavity shape, and the outline at this stage of the method is not yet final form of the product.
In one expedient embodiment of the method provides that the movement of the circuit form occurs in two stages, with the first stage of movement of the circuit, at least one Adigey and retractable plunger, preferably two covering the mold cavity of the plunger front face of the clamp between a workpiece with the formation of at least one hole.
It is advisable the billet in half-form, as well as the location of embedded items occur between the first and second stages of the circuit.
Although below we are talking about one embedded items, the invention should be understood to mean that the product can be, of course, several embedded details.
Also through the side hole of the tubular workpiece and through the opening between the half-form can be carried out the change and other manipulations inside of the manufactured product.
The method may concern the manufacture of the fuel tank, however, the invention should be understood to mean that the proposed method can be made of any plastic hollow product.
In one embodiment, the method provides that the procurement is dealt by air blowing, and formed in the front face portions form a hole is placed at least one inflatable Dorn.
Instead of one hole may be provided with several holes, each of which may serve to accommodate one inflatable mandrel.
It is advisable embedded item is placed formed through the front face portions of the hole.
In one preferred variant of the method, the workpiece through the grip is removed from the extrusion head and is placed between the open half-form.
In this case, the billet, for example, before or during the space between the open half-form can be distributed towards the periphery or partially stretched. Provided for this purpose, the grippers are described, for example, in the publication DE 10205524 legal predecessor of the applicant, to which reference is given here in full, with the purpose of the disclosure. It is expedient may be provided workholding for remote apart ends, as well as its distribution in the direction of the periphery or growth is used.
The billet occurs only in such degree as is required to match a tubular workpiece with the front face parts and/or press the edges of the form.
Especially useful when embedded item through a preferably multi-axis manipulator is placed in the partially formed blank.
In one expedient embodiment of the method provides that after placing embedded items or parts in a partially formed blank formed in the front face portions of the hole is again placed inflatable mandrel and the workpiece is fed back to the air blown to remove any formed folds, in particular, in the area between the press-edge shape and the front face parts.
Thereafter, the mold halves may be closed, and the plastic product can be permanently swollen.
Underlying the invention the problem is solved further by means of molds for blow molding plastic articles, in particular, to implement the above method, the form includes at least two forming forming the socket of the mold halves, performing in relation to each other, the movement of opening and closure, at least one proforma, preferably both, is provided with at least one covering the corresponding cavity of the plunger in which the quality of the front face, which is provided with at least one recess for the formation of holes to accommodate the inflatable mandrel and/or to input pointing device.
In one suitable embodiment, the shape provided that it includes at least one inflatable mandrel, with the envelope of the sealing band, which, if the billet is sealed adjacent to moving to another front facial parts.
Suitable front of the front to do with the possibility of lowering and pull-out from the plane of the connector half-form, for example, hydraulically.
To avoid the formation of too many overflow appropriate, if the front of the front follows the profile of the cavities. The front of the front does not have to consist of each of the individual segments of the plungers, and they, on the contrary, can consist of a large number of segments of plungers located next to each other in the plane of the connector half-form.
Preferably, at least one front face part is made with the possibility of tempering, in particular heating, so that the material blanks remained plastic formed inside the front outer parts of the frame.
In another preferred embodiment, the form may be provided that at least one front face portion provided with a loaded RA is a warning suction holes for fixing the workpiece. In this zone, the workpiece can remain on the front bezel by the attached vacuum. Suitable suction or vacuum holes are made at a distance from each other along the periphery of the front face parts on their faces the cavity inner side.
The invention is illustrated below by the example of implementation shown in the drawings, which represent:
- Fig. 1: perspective view of the parts of the extrusion head with leaving it blank;
- Fig. 2: a section along the line II-II of Fig. 1;
- Fig. 3: perspective view of the molds for blow molding plastic products, illustrating the process of the way;
- Fig. 4A: cut the shape of Fig. 3 and placed between the half-form of the workpiece;
- Fig. 4B: top view of the arrow of Fig. 4A;
- Fig. 5A: partial cut shape with closed before half-form billet;
- Fig. 5B: cross-section on the line-In of Fig. 5A;
- Fig. 5C: a section along the line C-C of Fig. 5A;
- Fig. 5D: the corresponding Fig. 5C view from prisoners inflatable mandrel;
- Fig. 5E: corresponding to Fig. 5D is a view illustrating the location stevieboy parts in a partially molded product;
- Fig. 6A: an open form with a laid back front front parts;
- Fig. 6B: a partial section of the form shown in Fig. 6A state;
- Fig. 7A: cross-section shape in the replacement the chickpea condition;
- Fig. 7B: cross-section of forms and products, while removing.
In Fig. 1 shows an extrusion approximately tubular workpiece 2. The bag blank of thermoplastic is extruded from the extrusion head 1 in the molten-hot condition, namely, in a known manner via an annular slit nozzle. Extrusion can be carried out continuously or periodically. In this example, the sleeve blank 2 is cut on one side by the length by the cutting device 3, causing it along its entire length takes the form of the cross section of Fig. 2, i.e. provided with a longitudinal slot 4. As the cutting device is used, for example, a hot knife, a movable blade, a laser, etc.
Tubular workpiece 2 may be cut, as in this example, out of the extrusion head during or after its exit from it or from the annular gap nozzle (not shown). Alternatively, the sleeve blank 2 may be cut within the extrusion head 1 by means provided therein divider current.
Finally, as an alternative of the bag blank 2 may first be squeezed out along its entire length and then cut by means of gripping and cutting device.
In this example, the tubular workpiece 2 is removed from the extrusion head 1 by means of the grip 5 and is supplied to fo the IU 6 for forming blown, as is schematically shown in Fig. 3.
Capture 5 shows highly schematically. He does not have to contain the gripping element in the form of a circular segment, on the contrary it may contain are located approximately in the shape of an arc of a circle or polygon gripping elements designed to capture tubular workpiece 2 suction cups. Such described above capture is described, for example, in DE 1025524. The removal of the tubular workpiece 2 can contribute additional cutting device for her. Alternatively, it is possible by narrowing the slit nozzle of the extrusion head to form a thin place in the bag the workpiece 2, which provides her a break through seizure 5.
During manipulation of the tubular workpiece 2 using capture 5 it can distributed towards the periphery or radially, in order to achieve an appropriate match cavities 7 form 6. Additionally revealing elements 22 grab bag of the workpiece 2 on the bottom in the direction of gravity the end of the adjacent slot 4 areas and keep holding them. Revealing elements 22 can be performed, for example, in the form of pneumonia that for distribution to the tubular workpiece 2 can move relative to each other.
This example shows a one-sheet form, i.e. related to each other lanes and 7 half-form 8A, 8b form a single slot. Form 6 can be performed also in the form of mnogoplodnoy (this concept).
While grabbing 5 moves the tubular workpiece 2 between the open half-form 8A, 8b of form 6, is the alignment of the longitudinal section 4 of the tubular workpiece 2 so that it coincided with the plane of the connector 10 forms 6, namely in the example of Fig. 3 in the direction facing toward the observer side.
Each proforma 8A, 8b provided with plungers 9a, b, c, d, which are preferably hydraulically ejected from the plane of the connector forms 6 and slide in it. While driving circuit of the half-form 8A, 8b plungers 9a, b, c, d serve as the front face and lower parts are called.
As can be seen in particular in Fig. 3, the front face portion 9a, b, c, d cover, respectively, the cavity 7 of the half-form 8A, 8b, and, for clarity, shows the location does not match the contour of the cavities 7. In fact, the front face side (ungary) consist of several segments 9a, b, c, d, each of which corresponds to the contour of the cavity 7, so that, thus, has emerged as a possible overflow. The front of the front can be performed as a whole.
After bringing tubular workpiece 2 in the position shown in Fig. 3 and its corresponding alignment of the mold halves 8A, 8b of form 6 is extended from the plane 10 of the connector front face what authorities 9a, b, c, d converge so that the latter occupies the position shown in Fig. 5A, 5B. They clamp to the tubular workpiece 2 on the periphery, forming between the fin 11. In this position of the mold halves 8A, 8b is not fully closed and kept at a distance from each other, the front face portions 9a, b, c, d.
On the front side of the half-form 8A, 8b, i.e. on the sides perpendicular to the plane of the connector 10 forms 6, in front of the front parts 9a, b, c, d are made corresponding to each other of the notches 12, which, after convergence of the front face portions 9a, b, c, d form a hole 13 (Fig. 5A)through which passes the plane of the connector 10 of the closed half-form 8A, 8b. These holes are located symmetrically with respect to the (imaginary) plane 10 of the connector. A longitudinal slot 4 of the tubular workpiece 2 is held is also an ideal way in the plane 10 of the connector.
After a (forced) toe front front parts 9a, b, c, d, caused for example by movement of the closure of the half-form 8A, 8b, the sleeve blank with the formation of the fin 11 is flattened only out of the holes 13. In the area of the holes 13 of the longitudinal slot 4 of the tubular workpiece 2 remains open.
In the next step, depicted in Fig. 5B, 5C, each hole 13 is entered mounted on proforma 8b inflatable mandrel 14. In accordance with apertures 13 inflatable mandrels 14 are approximately round checheniastrategies should be understood as follows, the circuit and the number of holes 13, and the number of inflatable mandrels 14 are not critical.
In this example, the inflatable mandrels 14 are mounted on proforma 8b can be rotated, however, the invention should be understood that the inflatable mandrels 14 can also be installed on a separate device.
As can be seen in particular in Fig. 5C, 5D, each inflatable mandrel 14 is provided with a sealing band 15, which seals in the area of the hole 13 of the front face portion 9a.
In the next step, depicted in Fig. 5D, 5E, sleeve blank 2 is pressed against the cavity 7 with the air supply for blowing sounds. After the distribution and partial forming a tubular workpiece 2 in the semi-finished product 16 inflatable mandrels 14 can be tilted out of the holes 13. Inflatable mandrels 14 are fully open holes 13, as a result, as shown in Fig. 5E, in the semi-finished product 16 may be a pointing device 17 with embedded item 18.
After joining the recessed parts 18 to the wall of the semi-finished product 16 holes 13 is again closed inflatable mandrels 14.
Then in tubular workpiece is fed back to the air blown to prevent the formation of folds therein adjacent to the front face portions 9a, b, c, d area or to smooth possible, formed there folds.
Here it should again be mentioned is the fact that the number and position of the embedded parts, as well as their views are not critical for the invention. In this case, the product may be, for example, a fuel tank, in which is embedded items placed protivoatomnoi glass.
In the example of Fig. 3 manipulator 17, made in the form of three-coordinate of the robot arm, and also three-dimensional capture 5 are located on opposite sides of the form 6. Alternatively, they can also be located on one side of the line.
After placing embedded items 18 in the semi-finished product 16, if necessary, re-enter the inflatable mandrels 14 into the holes 13 and additional blown tubular workpiece 2 front front part 9a, b, c, d are drawn (Fig. 6A), and the mold halves 8A, 8b do the movement circuit, during which the passing width of the gap 19 between the material of the wall of the semi-finished product 16 is flattened into additional overflow 20. For clarity, the gap 19 is depicted exaggeratedly large. The finished product takes the form of Fig. 7A, 7B. The mold halves 8A, 8b disclosed or diverge by the arrows in Fig. 7B, and the finished product 21 can be extracted through the extracting device. Of course, the fin 20 is removed.
The reference list of items
1 - die
2 - hose stocking
3 - cutting device
4 is longitudinal Rorty
5 - capture
6 - form for molding.
7 - cavity
8A, b - semiform
9a, b, c, d - plungers (front face side)
10 - plane connector
11 - Burr
12 - seizure
13 - hole
14 - inflatable mandrels
15 - o band
16 semi - finished
17 - manipulator
18 - recessed detail
19 - backlash
20 - overflow
21 is a finished product
22 - revealing
1. A method of manufacturing a plastic product, comprising the following steps:
the extrusion approximately tubular workpiece;
the division of flow of the melt inside the extrusion head or cutting out or already released extrudate so that you receive the workpiece approximately C-shaped section, and
strain inside of a form for molding blow with the application of differential pressure to a hollow body,
wherein said first carry out the distribution and partial pre-molding the preform in a partially closed form,
in the next step between the parts is not completely closed forms and through the open side of the workpiece inside a partially pre-molded product is placed, at least one recessed part, and
in the next step, the form is fully complete, and the product is completely othermovies education, at measures which, partially enveloping the tapered seam
the movement of the circuit forms do in two stages, with
at the first stage of movement of the closure with the help of at least one, preferably several, covering the mold cavity of the plungers as the front face of the clamp the workpiece with the formation of at least one hole between them.
2. The method according to claim 1, characterized in that the separating seam of the workpiece verify on the plane of the connector form so that it passes around an imaginary plane of its socket.
3. The method according to claim 1, characterized in that between the first and second stages of the circuit are billet in half-form, and the next step of the method is placed embedded item.
4. The method according to claim 1, characterized in that the workpiece distribute by means of air blowing, and formed in front of the front parts of the hole is injected, at least one inflatable Dorn.
5. The method according to claim 1 or 3, characterized in that the recessed part is placed formed through the front face portions of the hole.
6. The method according to claim 1, characterized in that the workpiece through at least one gripper is removed from the extrusion head and is placed between the open half-form.
7. The method according to claim 1 or 3, characterized in that prior to placement in travenol items or during harvesting distribute between the half-form in the direction of the periphery and/or partially extend.
8. The method according to claim 5, characterized in that prior to placing embedded items or during harvesting distribute between the half-form in the direction of the periphery and/or partially extend.
9. The method according to claim 7, characterized in that a recessed part is placed in the partially formed workpiece by means preferably of the multi-dimensional pointing device.
10. The method according to one of claims 1, 3, 6, 8 or 9, characterized in that, after a recessed part formed in the front face portions of the hole again enter the inflatable mandrel and the workpiece again served in the air for blowing.
11. The method according to claim 5, characterized in that, after a recessed part formed in the front face portions of the hole again enter the inflatable mandrel and the workpiece again served in the air for blowing.
12. The form (6) for blow molding for the manufacture of plastic products (21) the method according to one of claims 1 to 11, containing at least two forming the socket of the mold halves (8a, b)made with the possibility of making relative to each other, the movement of opening and closure, and at least one proforma, preferably both, is provided with at least one covering the corresponding cavity of the plunger (9a, b, C, d) as the front face of the form, which is provided with at least one recess for education the holes (13) to enter the inflatable mandrel (14) and to conduct through it manipulator (17).
13. The form indicated in paragraph 12, characterized in that the front face portion (9a, b, C, d) forms made with the possibility of lowering and pull-out of plane (10) of the connector half-form.
14. The form indicated in paragraph 12 or 13, characterized in that the front face portion (9a, b, C, d) on the form correspond to the contour of the cavities (7).
15. The form indicated in paragraph 12 or 13, characterized in that at least one front face portion (9a, b, C, d) forms made with the possibility of tempering, in particular heat.
16. The form indicated in paragraph 12 or 13, characterized in that at least one front face portion (9a, b, C, d) the form has loaded the vacuum suction holes for fixing the workpiece.
FIELD: machine building.
SUBSTANCE: proposed method comprises preparing binder directly before impregnation of fibrous filler. Epoxy-novolac binder with number-average molecular weight of 300 a.u. and weight fraction of epoxy groups of 8-11 are produced by loading 10-28 wt % of product into reactor, said product being obtained by epoxidation of hydroxyphenyl oligomer from alkyl resorcinol, 47-80 wt % of diane epoxy resin and 10-25 wt % of modifier, and by boiling at 60-250°C for 30-180 minutes. Article is shaped by drawing fibrous filler impregnated with binder and hardener via replacement die and helical winding on reinforcing bundle core.
EFFECT: higher physical and mechanical properties.
FIELD: process engineering.
SUBSTANCE: invention relates to machine building, particularly, to production of wear-resistant equipment with the use of polyurethane elastomers. In compliance with this method, structural elastomer parts are hardened by combining the elastic cold uniaxial deformation to 1-3% of initial size and mechanical fixture of geometrical sizes of elastically strained part. Hardening of said parts is ensured by their compression and highly elastic strain to 3-10% of initial sizes and retaining said part as-compressed. Fixture of the parts thus strained is ensured by the use of extra components, say, shells, cells, screw rods, stop plates of rigid polymers that prevent recovery of the part initial sizes.
EFFECT: hardening increased some 1,5-2,0 times.
3 cl, 7 dwg
FIELD: process engineering.
SUBSTANCE: flexible film sleeve 10 is cut in helix to flat strip by unwinding the film by rotary unwinder 1 on feeding flat film to sleeve expansion zone. Flat sleeve expands in said zone to round cylindrical sleeve to be passed axially above hollow mandrel 14 that feature OD slightly smaller than expanded sleeve diameter. Cutting is performed by knife 18 arranged at mandrel to flat strip moving off toward mandrel axis at an angle. Flat sleeve is stretched in lengthwise direction by tensioning tolls 107-112 revolving jointly with aforesaid unwinder. Besides, proposed device comprises stabilising means to stabilise orientation created by said tensioning rolls as applied to strip cut in helix after withdrawal from the mandrel.
EFFECT: higher film stabilisation, particularly, that thin laminar plastics.
22 cl, 3 dwg
SUBSTANCE: method consists in extrusion of lower, middle and upper films from according granules; thermal moulding of middle film having honeycomb structure; calibration and partial cooling of lower and upper films for their connection to middle film and further joining of these films. Device for production of web contains three extrusion heads, which produce extrusion unit. Then there is unit of middle film thermal moulding, units of upper and lower films calibration and cooling and cylinders of further heating of upper and lower films. Cylinders are installed upstream connection unit, where films are supplied from units of thermal moulding and units of calibration and cooling. Blister web is produced in a single production stage.
EFFECT: web has good physical and mechanical properties with no flaking and is used as element of protection or element of package.
19 cl, 3 dwg
FIELD: technological processes.
SUBSTANCE: invention is related to the field of plastic masses technology and method for making of art object from plastic mass. Hollow stock is pressure-moulded from transparent plastic masses on the basis of thermoplastic polymers. Twisted textile fibres coated with a layer of ceramic slurry and dried till moisture of not more than 5%, are attached to its internal walls, stock is heated till softening temperature, walls are applied one over another, then rolled and cooled.
EFFECT: simplified making of item from plastic mass with strictly fixed art composition.
FIELD: technological processes.
SUBSTANCE: invention is related to the field of plastic mixture technology and is related to method for production of art object from plastic mixture. Method includes pressure moulding of hollow blank from transparent plastic mixtures on the basis of thermoplastic polymers, its heating to softening temperature, rolling and cooling. Blank is heated to temperature that is less than its softening temperature by 10-30°C, afterwards internal surface of heated blank wall or its sections are metallised.
EFFECT: method provides for production of flat art object from plastic mixture with art composition of different colours.
FIELD: technological processes; textiles.
SUBSTANCE: hollow stock is molded under pressure from transparent plastic masses on the basis of thermoplastic polymers. In hollow stock pieces of woven and/or nonwoven, and/or knitted material are attached to its walls, on the basis of synthetic and/or wool fibers, stock is heated to softening temperature, at that walls are applied one onto another, then rolled and cooled. Prior to their fixing to wall of hollow stock pieces of woven and/or nonwoven, and/or knitted material are fixed to each other.
EFFECT: simplification of object production process from plastic mass with clearly fixed art composition.
2 cl, 1 ex
FIELD: technological processes.
SUBSTANCE: method includes pressurised molding of hollow billet from transparent plastic masses on the basis of thermoplastic polymers and installation in the billet and fixation to its walls of decorative elements made of coloured plastic masses on the basis of thermoplastic polymers. Then stock heating is done up to softening temperature with walls superposition one above another with further rolling and cooling.
EFFECT: prevention of decorative elements displacement.
FIELD: technological processes.
SUBSTANCE: in method of plastic fuel tanks thermoshaping, gripping of peripheral borders of heated sheet, while it is being transported along corresponding production line, is done with pneumatic devices. Vacuum support of sheet in flat condition is made. When the sheet is positioned above corresponding forming half-mould, it is pneumatically retained in flat condition. For turning the half-mould over, one of the half-moulds is turned down with its top side. Cooling of half-moulds and thermoshaped tanks may be performed aside of production lines.
EFFECT: simplifies fuel tanks manufacturing cycle of high degree of structural homogeneity.
21 cl, 10 dwg
FIELD: medical technique.
SUBSTANCE: method and device can be used for making non-implanted prosthetic appliances of mammary gland intended for replacement of tissue deficit during post-operational period. Method of making of prosthetic appliance is based upon formation of front part of exo-prosthetic appliance due to vacuumization of first polymer film envelope in matrix followed by supply of filler into matrix; formation of back part of prosthetic appliance due to placement of second part of polymer film envelope onto matrix followed by air removal and by creation of pressure directed onto second part of polymer film envelope along circuit of matrix; vulcanization of filler and connection of back part of exo-prosthetic appliance with front part of it. Device has matrix provided with vacuum duct for connection with gas-discharge device, cap, tightening screws, air outlet valve, punch disposed between cap and matrix, and pressure controller which has rod fixed in punch. Cap is made in form of two plates. Plates are connected together by tightening screws. There is damper between plates. Vacuum duct is provided with stop valve. Pressure controller is made in form of spring-loaded holder mounted at end of rod. Holder is provided with screw and it has minimal size of cross-section of working end being equal to ½ width of plank minimum.
EFFECT: production of clamping surface having spring contact wit tissues.
9 cl, 4 dwg
FIELD: technological processes.
SUBSTANCE: in a conventional preform the spherical form of gate part creates an alternating angle of infrared beams refraction, which results in uneven heating of the preform during repeated heating. According to the versions of the inventions realisation, a preform (300, 400, 900) is used, as well as a composite die mould (600, 1000) to make a preform (300, 400, 900). The preform (300, 400, 900) is designed for further blow molding and comprises a neck part (302, 402, 902), a gate part (306, 406, 906), and also a body part (304, 404, 904) arranged between the neck part (302, 402, 902) and the gate part (306, 406, 906). The gate part (306, 406, 906) is coupled with a substantially cone-shaped form. In a version of inventions realisation, a substantially cone-shaped form is selected so that it substantially straightens the angle of beams refraction (206), used at the stage of blow moulding process.
EFFECT: preform made in a composite die mould according to inventions, provides for straightening of refraction angle, at least a part of multiple infrared beams around the gate part at the stage of the repeated heating in process of exhaust and blow moulding.
25 cl, 11 dwg
FIELD: technological processes.
SUBSTANCE: invention is related to making blow die with heating for thermostabilising treatment and to realisation of thermosetting process. Die holder consists of two mirror-reflected halves of shell and heating system. Each of shells comprises half of die with specific die for making container. Heating system consists of a set of the first electric heating elements and set of additional electric heating elements, which are electrically connected to each other and are installed between die holder and die. The first heating elements are parallel to each other and source of container energy. Additional heating elements are substantially transverse versus specified first heating elements and are installed in sections, to which increased number of heat should be sent. Besides additional heating elements are located near upper and lower end sections of container. On external surface of die holder there is layer of material arranged for heat insulation.
EFFECT: prevention of damages near container neck in process of moulding and efficient use of energy.
4 cl, 3 dwg
SUBSTANCE: compound mould-complete set for usage on standard machines for blown die casting with drawing consists of halves of compound mould, which are agreeably installed on each plate of die-casting machine. Each half of mould allows system of slots of mould for die casting and system of slots of blown mould for blow melting with drawing of performs into blown products. Corresponding different slots are located so that they are open in the same direction of mould separation. Mould-complete set is provided for usage in method of moulding of plastic products, according to which in slot of mould for die casting it is casted perform under pressure, which is then blown out in form in slot of blown mould. Mould contains system of slots of mould for die casting and system in essence of elongated slots of blown mould, allowing each neck area. Each slot of each system is formed at least by two parts of mould, implemented with ability of separation in corresponding direction of its separation. Separation direction of slots of mould for die casting and slots of blown mould it is formed common direction of separation of mould, so at operation mould can be opened for release as die casted preforms, as and blown products. Longitudinal axis of slots of blown mould pass essentially perpendicularly to common direction of separation of mould, and its neck areas join to its external boundary, so that access to it is possible on the outside transversal to axis of opening and closing travel. Device for blown die casting or with drawing, of plastic products contains mould-complete set by invention. Method of blown moulding of plastic products, in which it is used mould-complete set, is formed by die casting of preform with usage of slots of mould for die casting; drawn and/or blown out in form of previously die casted preforms in slots of blown mould; it is opened mould-complete set for release of die casted preforms and blown products and there are traveled die casted preforms into slots of blown mould.
EFFECT: single-phase process, using low power consumption and ability to work with awkward shapes or products with width neck, not requiring expensive equipment.
26 cl, 65 dwg
SUBSTANCE: invention relates to conveying system for plastic containers, particularly to means for setting container angular position. Proposed system comprises conveyor belt running around drive wheel to make a closed conveying line. Container loading wheel is arranged at said closed line, nearby said drive wheel. Multiple grippers at the section of interaction with loading wheel to make combined pairs gripper-container are arranged conveyor belt. Conveyor has intermediate section whereat said combined pairs can run free about their axis. Conveyance system comprises first means of setting container angular position at loading wheel, second means of setting container angular position at drive wheel and third means of setting angular position of aforesaid pairs.
EFFECT: higher efficiency, expanded conveying performances.
18 cl, 18 dwg
SUBSTANCE: proposed gripper is design to fasten blanks in production of plastic containers. This gripper comprises case 11 attached to conveying chain link and assy 12, 13, 14, defining the lengthwise axis and fitted in the case lengthwise through hole. Said assy can slide axially and/or turn about axis and includes container neck grip 17. Said case comprises retainers 16', 16", 27 to hold the assy in preset angular position while assy is provided with element 20 to set preset angular position.
EFFECT: fast and reliable fastening of container blanks.
10 cl, 18 dwg
FIELD: process engineering.
SUBSTANCE: mould 1 is made from plastic billet 3. Proposed mould 1 comprises: two half-moulds 4, means to drive the latter between closed position whereat said half-moulds make cavity 6 to accommodate billet 3 or moulded container 2 and open position whereat half-moulds are spaced apart to allow extraction of moulded container 2 from cavity 6 or feeding another billet 3 in cavity 6. It has two jaws 7 arranged to displace between the position of engagement with billet or container and disengagement therefrom. Half-moulds 4 form inner section 9 of mould 1 to make jaws surrounded, at least partially, by half-moulds relative to external contour of said jaws. Invention covers also the method of making container from plastic billet 3 using above described mould.
EFFECT: simplified handling of billets and containers.
11 cl, 12 dwg
FIELD: machine building.
SUBSTANCE: gripper mechanism comprises clamped tubular part, drilled tubular part and, at least, one grooved tubular part. Clamped tubular part is required for concentric coverage of tube billet. Drilled tubular part is arranged concentrically relative to clamped tubular part relative said clamped part and provided with tapered radial holes. Said holes house first line of hard balls to displace radially. At least, one grooved tubular part may displace axially relative to drilled part and is furnished with lengthwise grooves. Balls fit partially in said grooves. Lengthwise grooves are somewhat wider than ball diameter and feature variable depth. Grooved part axial displacement in one direction provided for radial displacement of balls in tube direction, tube gripping and its deformation, or, in opposite direction, for its release.
EFFECT: proper tube orientation, protection of tube against chip formation.
8 cl, 7 dwg
FIELD: transport, package.
SUBSTANCE: invention relates to production of plastic containers. Proposed device fabricates plastic vessels from poly(ethylene) glycol terephthalate. It comprises injection-blow-moulding machine and conveying device that comprise take-up and delivery sprockets or injection-blow-moulding machine wheel. Note here that injection-blow-moulding machine has radiator arranged therein or thereon, and/or said radiator is directed toward machine moulding zone, and/or on vessel blower case inner surfaces. Note here that injection-blow-moulding machine represents rotary machine while radiator is mounted in or on rotary elements to rotate therewith.
EFFECT: better aseptic conditions.
15 cl, 2 dwg
SUBSTANCE: rotary head is intended to shape bottle collar, blow crude blank and transfer blank from blank mould to final blow mould in glass-forming machines. Device comprises body 6, holders of neck rings, cartridge 2, piston-holder of plunger 3, lever-cam 4, compression spring 5, right leash 7, left leash, limiting gear, race 10, filter 11, insert 12, spring 13, tension spring 14, movable insert and guide 16. Rotary head comprises body 6, which represents shaft, and its middle part is arranged in the form of parallelepiped with cylindrical hole in the centre. Rotary head is arranged so that it may be rotated in a controlled manner around horizontal axis. Neck shape holders controlled by closing and opening mechanism fixed on body 6 are introduced into rotary head. Besides the right (7) and left leashes are joined by bolts to holders of neck shape and are installed with the possibility of motion. Limiting gear is installed on the left splined journal of shaft and is equipped with controlled thrust screws intended for setting of neck shape position in holders of neck shape in blank and final blow moulds. Shaft bearing installed in race 10, being part of vacuum and compressed air pipeline and intended for location of filter 11 and sealing element between according movable and fixed parts of body. Cartridge 2 is inserted into cylindrical hole and is attached to body by two screws. Piston-holder of plunger 3 is installed in cartridge 2 under holders of neck rings. Movable insert is installed in lower part of piston-holder of plunger 3. Compression spring 5 is installed in piston-holder of plunger 3 over movable insert. Lever-cam 4 is installed hingedly in eye of cartridge 2. Tension spring 14, one end of which is connected to lever-cam 4 and the other one - to finger installed on guide 16. Sealing element consists of spring 13 and insert 12.
EFFECT: expansion of functional capabilities.