SU793793A1 - Mould for making foamed articles - Google Patents

Description

one

The invention relates to the non-processing of plastics and can be used in various industries and for the production of soft furniture elements.

The known form for the manufacture of polymer products, containing the lower and upper half-form with an inclined surface and a lock made in the form of a lever fixed on the lower half-form with a grip in the form of a shoe pivotally mounted on the lever, with the angle of inclination interacting with it less than the angle friction materials of the inclined surface and the shoe. The disadvantages of the form include the impossibility of mechanically opening parts of the form IJ.

Also known is the form for the manufacture of polymer products, containing, and the split upper and lower half-forms, connected by a wedge clamp, made in the form of a rod mounted on one of the half-forms with a rotatable wedge sector fixedly fixed on it, interacting with a support bar mounted on the other half-form . The disadvantages of this form include the impossibility of ensuring the mechanical opening of a part of the form and their tight closure 2.

The purpose of the invention is to increase the reliability of the mold and improve the quality of molding products.

This goal is achieved by the fact that it is shaped for the manufacture of polymer products, and the detachable upper and lower halves are connected by a wedge clamp made in the form of a rod mounted on one of the half-molds with a fixed clamping sector, which interacts with the support bar mounted on Another zero shape according to the invention is provided with an additional zalisim performed in

the form of a screw mounted on a bracket pivotally connected to the lower half-form and fixed on the upper half-form with a flange with a groove for screw placement, and also equipped with a double-arm sharpened to the lower half-form, one end of which is rigidly connected to the upper half-form and the other is spring-loaded relative to bottom half-form.

The described invention is illustrated by drawings, where in FIG. 1 shows a general view of the form; in fig. 2 - the same, top view; in fig. 3 - section A-A of FIG. 2; FIG. 4 - section bb FIG. 2; in fig. five -

open form.

The form includes the bottom 1 and top 2 detachable parts and the forming cavity 3.

A sleeve 4 (of fluoroplastic) with an opening for the exit of gases, made in the form of an inverse cone, excluding adhesion with polyurethane foam, intended for 1. Of preventing the mass from leaving the form, is mounted on the upper part of the mold. The detachable parts of the form through tides 5 and 6 are pivotally connected by a screw 7 with nuts 8 and washers 9. The lower part of the screw is made in the form of a two-armed lever 10 connected to the lower tide by means of an axis 11.

In the lower part of the lever 10, a yoke 12 is fixed to it, to which a spring 13 is attached with one end. The spring is connected to the other end with a screw 14 mounted in a brace 15.

The sector wedge clamp (Fig. 4) is intended for instant locking of the mold after insertion of the forming mass into the mold. It is made as follows. The rod 16 is rigidly mounted in the inflow of the lower part of the form and is fixed by a nut 17 with a washer 18. On the plane of the annular protrusion of the rod 16 there is a rotary wedge sector 19 provided with a handle 20 and adjacent to the support bar 21 fixed on the flange of the upper part of the form.

To fix the neutral position of the wedge sector 19 on the rod 16, a ring 22 is installed with a torsion spring

23, fixed at one end on the washer

24, and another in the wedge sector 19. The additional clamp (FIG. 3) is made in the form of a screw 25 connected to the bracket 26. The bracket is connected to the oil jet 27 located on the lower part of the form by means of an axis 28. The lower part of the bracket 26 ends with a tilt limiter 29. The screw 25 in the upper part has an annular recess for mounting the brass ring 30 with the locking screw 31. The screw 31 in the assembly is installed in the bar 32 with a groove for its placement. On the screw 25, the handle 33 is rigidly fixed with a rotary knob 34.

The form is mounted on the paws 35. The upper part of the form is provided with a handle 36 for lifting it.

The molding of soft furniture elements is carried out as follows.

First you need to open the wedge clamps, which are designed for instant locking the form and installed in its lateral part.

The handle 20 is turned until it moves to the position indicated in FIG. 2 with a dashed line, i.e., until the wedge sector 19 contacts the wedge support strip 21: a gap is formed between the side surface of the mold and the wedge clamp, which makes it possible to open the upper part of the mold. The torsion spring 23 locks the wedge clamps in a neutral position.

For the gradual release of gases from the mold for safety purposes, after molding the articles and reducing the applied force of the starting torque to the handle, additional ones serve. Brass ring 30 perceives itself axial

pressure and reduces the coefficient of friction slip slats in the plane of the annular undercut.

Rotate the arms 33 and unscrew the 25 clips from the brackets .26 to

forming a gap between the plane of the annular undercut and the rings 30. However, a gap is formed between the bar 32 on the upper part of the form and the lower plane of the screw head 25. The screws are free from close contact with the nlan 32 of the upper part of the form, which makes it possible to insert the screws 25 installed in the brackets 26, into the groove of the bar 32. The screws with the brackets are rotated

around the axes 28 until the tilt limiter 29 touches the bottom of the form. Then the upper part of the form 2 is lifted, while the springs 13 fixed on the cross-arms 12 are compressed and the cover is lifted

until it is fully opened (Fig. 5). A dosage portion of polyurethane foam is poured into the mold.

The closing of the form of the spring 13 is stretched to complete closing of the upper and

bottom of the form. At the same time, turning the handles of the 20 wedge clamps locks the side parts of the mold. Then the front part of the form is locked with additional screw rooms;

25 screws into the slot of the upper part of the form.

The invention should improve the quality of molding products from polyurethane foam, mechanize the opening of the upper part.

forms, thereby improving the working conditions and reducing the metal intensity of the form.

Claims (2)

1. A form for the manufacture of foamed products, containing detachable upper and lower half-shapes, connected by a wedge clamp made in the form of a rod mounted on one of the half-molds with a rotatable wedge sector fixedly fixed on it and interacting with a support bar mounted on the other half-form, differing in , what, in order to increase the reliability of the form and improve the quality of the molding of the products, the form is provided with an additional clamp, made in the form of a screw mounted on a bracket pivotally connected to bottom half-form, and fixed on upper half-form with groove for screw placement. 2. The mold according to claim 1, characterized in that it is provided with a two-arm lever hinged on the lower half-form, one end of which is rigidly connected to the upper half-form and the other is spring-loaded relative to the lower half-form. 6 Sources of information taken into account in the examination 1. USSR author's certificate No. 666086, cl. B 29C 1/16, B 29C 1/00, B 29D 27/00, 1977. 2. The patent of France No. 2005964, cl. In 29C 1/00, published. 1969 (prototype). Connector line -2S FIG. FIG. g / f