SU638248A3 - Device for making polymer material webs by pressure-die casting - Google Patents

Description

rear cushioning plates); on phpg. 11- SECTION I-I FIG. 2, showing the hooks, partially detached from the cavities of the pressing plates; in fig. 12 is a perspective image of the product; in fig. 13 is a perspective view of a modification of the shape of the crE-shaped element and the adjacent part of the base on which this element is fastened; in fig. 14 and 15 are two types of modified hook element.

A device for manufacturing a molded plastic product contains a shaft / (FIG. 3) housed in a support sub-holder 2, the outer cage of which is reinforced in a plate 3 protruding from the housing 4. The device also contains a driven rviexanM3M (not shown) for rotating shaft 1 .

The drum-type mold 5 is fixed on the protruding part of the shaft 1 to the right of the sub-holder 2. The supporting element for the various components of the mold 5 is the disk 6 (Fig. 2 and 3), made as a single unit with the shaft / by welding. In the center of the peripheral part of the disk 5 there is a continuous groove 7, in which several (in this case, eight) groups and are placed; assembled pressing 8 and gasket 9 plastip. In the upper part of FIG. 3 shows a group of pressing plates 8 with spacer plates 9 alternating with pressing plates; another similar group is shown in the lower part of the drawing. There are a total of eight such groups of connected press and gasket plates. They are reinforced around the circumference of form 5 and disk 6. The plastip groups are adjacent to each other tightly in groove 7, and the arcuate surfaces of the pressing and gasket plates form a cylindrical surface that coincides with the central surfaces 10 of disc 6 on each side of the groove.

The side walls of the groove 7 are used for lateral placement of all groups of pressing and gasket plates. The depth of the groove 7 is such that the spacer plates of each group can be shifted in radial panlepia with respect to their adjacent pressing plates. The pressing plates 8 in each of these groups are located in a circular direction, which is achieved with the help of a pin 11, which fits tightly into the corresponding holes 12 in the pressing plates (Fig. 2 and 3). As shown in FIG. 2, the bottom surface of the groove 7 is octagonal in shape, and the groups of all pressing plates 8 are placed in the radial; nanometer, I: And. And the corresponding surfaces 13 of this octagonal bottom.

Form 5 is adjacent to the head M ext Pdera 15 (see fpg. 1). The head 14 is mounted on a bar 16, which is adjustable

by means of screws 17 and element 18. On the beam -16 with the help of brackets 19 rollers 20 are fixed, contacting with surface 10 of disc 6.

Rods 21 are provided to move the head 14. One end of each rod 21 is fixed in plate 3, and the other is freely passed through bar M and provided with a spring 22 and adjusting nuts 23. Springs 22 support rollers 20 in constant engagement with cylindrical surfaces 19 of disc 6 as the shape 5 rotates. With this engagement, the head 14 is at the desired distance relative to the shape 5.

The pressing plates 8 of each of the groups consisting of pressing and gasket plastics have, from opposite CTOipoH, design slots 24 (Fig. 7), these slots are also shown in FIG. 8 and have the shape of hooks — so that the hook-shaped protrusions or growths shown in FIG. 12. The spacer plates 9 (Fig. 7) occupy an external position, so that their arcuate surfaces coincide when moving from one group to another — around the entire disk 6, and also coincide with the arcuate surfaces of pressing ilastin 5 and with the extreme cylindrical parts 10 disk 6 on opposite sides of the groove 7 (Fig. 3).

The head 14 has two passages 25 and 26, and the passage 25 is designed to feed material under high pressure to the pump pump 27, while passage 26 is to feed the material under lower pressure to form the base of the web.

Slave rods 28 and 29 (Fig. 2 and 3) serve to move the plates 9. These rods are flat rectangular elements with rounded corners. They are connected by a toothed (unaccented) coupling with opposite: -: disc surfaces 6. At the inner) n-narrow ends of each pair of rods 28 to 29, shaft 30 is fastened (Fig. 3), on the outer ends of which are rollers 31 and 32 , coupled with the internal cam cam IMK 33 33 34 respectively (Fig. 3). The cam surface 33 is an internal cam formed in the fixed plate 35, while the cam surface 34 is provided in the plate 3. The shaft 30 passes through the hole 36 in the disk 6, and said hole is large enough for the shaft 30 to make rad ;; displacement for the purpose of displacing the spacer plates 9. On the shaft 30 there is a sleeve 37, the ends of which support the internal parts of the driven rods 28 and 29 by a certain distance from each other and create an opportunity for

sliding movement on:) KkhTvym disk drive 6.

The driven rods 28 and 29 at their outer ends are interconnected by means of two shafts 58 (Fig. 2) located at a distance corresponding to the arc length of the pressing 5 and gasket 9 plates of each of the groups. The shafts 58 are tightly coupled with the opposite edges of the rectangular holes 39 in the wedge shim plate 9. Thus, the shim plates 9 are held in a fixed position relative to the driven rods 28 and 29.

The driven rods 28 and 29 of each pair have a hydraulic cylinder 40 fixed in a rectangular bore 41. The inner end of each cylinder 40 is open to receive hydraulic fluid and hermetically connected to the feed channel 42 with a screw 43 at the outer end of the cylinder, the screw 43 is cut and screwed into the hole in the outer suit to switch its element.

Eight pairs of switching elements of the spacer plates are held in the outer radial position in any suitable way. As shown in FIG. 1, for operation of hydraulic cylinders 40, an accumulator 44 is provided in the device.

The shape or contour of the two inner cams 33 and 34 is the same, and one of them is shown in FIG. 2. The purpose of the hydraulic cylinders 40 is to move a pair of driven rods 28 and 29 for each group to the outer side of the cylinder so that and during the groups of pressing and cushioning plates pass by the head 14 of the extruder 15. The cushioning 8 plates are supported during external position using hydraulic pressure acting in cylinders 40 for a sufficiently long time after completion of the extrusion of the material and pressing, so that the plastic material of the substrate plate and cone different growths or keys hardened. Accordingly, the inner surfaces of the cams 33 and 34 have two semi-circular sections 45 and 46 connected by two displacing surfaces 47 of a smaller radius, which are diametrically opposite in relation to each other (Fig. 2).

The shear rods 28 and 29 of the gasket plate are guided by the ends of the gasket plates during the shear movement of the plates in the inner and outer radial direction. In order to have the possibility of radial movement of the shaft. In 38 behind the gasket 9 plates of each group, large round holes 48 are provided in the pressing 5 plates.

In the place of removal of the fabric is installed roller 49 (Fig. 1 and 2).

In order to retract the head 14 from the mold 5 1m, the carriage 50. is moved along the rail 51 from the actuator 52 and connected to the bar / 5.

In order to maintain a constant temperature of the nodes, the device is equipped with a cover 5 and a form 55 with a door 55.

FIG. 12 digital 54 marked a short piece of the substrate in the form of a continuous tape of extruded material, obtained using the proposed device. On one surface of this ribbon, numerous hairy protrusions of hooks or hooks 55 appear. These hooks are integral with the base, protrude from the surface of 54 pp; epine by 1.56 lg. And have rounded surfaces.

FIG. Figures 13-15 show modified forms, in which the hook loops have an inclined angle 56 and its end acts when the hooks are drawn from the design nests as cam surfaces.

The barrel 57 of the hook has two flat, one-sided sides 55 and a somewhat larger third side 59. But the cross-section of CT-OL1..OUT the part is larger in size .. :: к1 than at the top of the hook to facilitate filling the form. Three flat lateral parts of the trunk form continuous smooth curves on the reselt hook. The stem part of the third side lies in the same projection that the corresponding part of the third side of the barrel; the front part of Fig. 15. In addition, the shoes are covered with 1111HL ;;: C; Pz at a smaller angle with respect to; the barrel part than in the case when the CR eyeglasses were formalized in the design of the YCNH sockets, as shown in the pa fng. S.

It is obvious that the invention is suitable for making various forms of pre-cusps formed as BOvs and completely attached to the tape serving as the base. Also, the protrusions may, for example, include a plurality of loops, such as hook type loops. Ethn protrusions also include (M), 1, hook-shaped elements, which are in the form indicated in the oppsunny.

The device works as follows.

The polymer melt from the extruder head 14/5 passes through the aisle 25 into the forming nests 24 of the mold 5, centered relative to the head 14, to form hook-shaped projections. The melt from the head 14, acting on the passage 26, closes the gap between the head 14 and the form 5 and forms, connected to the base of the hook-shaped projections, the base of the polo. With further rotation of the form with the help of hydraulic cylinders 40, a group of 9 laying plates moves to the center of the form, forming a gap between the pressing 8 plates. As a consequence, the protrusions are easily removed from the plastic nests, and the resulting web through the roller 49 is sent to roll into roll. Then the cycle repeats.

Claims (2)

1. A device for producing a casting with needle-shaped protrusions under pressure from polymeric materials, containing an extruder with a two-channel head and a drum-like form that is movable relative to the head, along which forming cavities for protrusions are located on the outside, characterized in that ensuring the manufacture of canvases : - / , ™ -TP / doom fop; lifisi || j№f  . ffc a hook-shaped mold-forming cavity is formed by a set of plates with decorating sockets placed in the plane of rotation of the mold and kinematically connected with the mechanism of their radial movement relative to each other. 2. The device according to claim 1, wherein the mechanism for the radial movement of the plates relative to each other is made in the form of fixed plates mounted along the axis of the mold with copier grooves interacting with the rollers on which they are mounted gi interconnected by rods passing through the apertures of the plates interconnected by brackets. The source of information taken into account in the examination: 1. Patent of the USSR X 372786, cl. In 29 F 1/00, published. 1968. SS - hz :  , /, V, - I j) /% e ® @ / il