SU939230A1 - Injection mould - Google Patents

Description

(54) PRESS FORM

one

The invention relates to the processing of plastics and can be used for the manufacture of long hollow articles with a complex configuration of the internal cavity, for example, holders of turbine water meters.

A mold is known that comprises a fixed plate with a decorating cavity, a movable plate with a decorating sign and a removable plate connected by means of a fixed plate 1.

In said mold, the product is collided with a plate of removal with the help of tg mounted on a fixed plate. However, in a known form, when making long lengths of hollow articles with a complex configuration of the internal cavity during collision with a sign, it is possible to warp, tear, and chipped weak points of the product.

The closest in technical essence to the present invention is a mold comprising a fixed plate with a decorating cavity, a movable plate with a decorating sign, a detachable plate connected to the base plate, and a pusher plate with pushers. In this mold

at the initial moment, the product is simultaneously pushed by the removal plate and the pushers, then the removal plate is stopped and only the pushers carry out the product. As a result, the LIA product is removed from the mold without warping and damage 2.

However, in a known mold is impossible. to make lengthy products, since it uses a two-stage ejection system from the shank, the plates of which and the course of ejection of these plates occupy a large part of the closed height of the form, therefore, in this mold, it is possible to produce products 15 of a length not more than one third of the closed height forms.

The purpose of the invention is to provide an ejection of long products.

Claims (2)

The goal is achieved by the fact that a mold containing a fixed mold with a cavity, a movable plate with a sign, a plate of removal connected to the base plate, a plate of pushers with pushers are fitted with sliders mounted on the plates and spring-loaded relative to each other. with tapered shanks, sleeve with a tapered inner surface placed in the base plate and interacting with the tapered shanks of the sliders, and springs installed between the sign and the plate are pushed trees, and the slab is connected with a sliding plate with gables with the possibility of limited movement relative to it and is equipped with grippers interacting with sliders. FIG. 1 shows a mold in a closed position, a longitudinal section; in fig. 2 shows section A-A in FIG. one; in fig. 3 the same at the beginning of the product collision; in fig. 4 is the same at the end of the collision of the product. The mold contains a fixed plate 1 with a decorating cavity 2, a movable plate 3 with decorating sign 4, a removable plate 5 connected by means of a fixed plate 1, a plate of 7 pushers with pushers 8, a supporting plate 9 placed in it a sleeve 10 with a tapered inner surface 11, sliders 12 installed in one of the plates 7 of the pushers 8 and spring-loaded with respect to each other by the spring 13. The tapered shanks 14 of the sliders 12 match with the internal tapered surface 11 of the sleeve 10. In the plate 5 of the pickup, the clamps 15 are fixed, interacting with the slider 12. The springs 16 are installed between the plate 7 of the pushers 8 and the movable plate 3 with the designating sign 4. The product is indicated with the position 17. The form works as follows. When opening the shape, the product 17 remains on the movable plate 3. The shoulders of the grating 6 stop the removal plate 5, and it begins to push the product 17. Simultaneously with the removal plate 5, the pushers 8 stop as they are kinematically connected to the removal plate 5 through the plate 7 of the pushers 8, sliders 12 and grippers 15. The pushers 8 are located in the zone of weak points of the product 17. Simultaneous action on the product 17 of the removal plate 5 and the pushers 8 allows the product 17 to be removed from the mold without warping and tearing out of the weak points. The pushers 8 act on the product 17 only until its weakened places leave the forming parts of the mold. Further extension of the pushers 8 of the plate 3 and the formative mark 4 is impractical, since they place the fall of the products 17 into the lumen of the form. In this connection, the tappets 8 return to their original position. This is done as follows. When the ejection system is moving relative to the movable plate 3, the tapered shanks 14 of the sliders 12 interact with the tapered surface 11 of the sleeve 10 and, overcoming the resistance of the spring 13, slide the sliders 12 out of engagement with the grippers 15. At the time of uncoupling the spring 16, they return the plate 7 with the sliders 12, the plate 7 with pushers 8 to their original position. The disclosure of the form continues until the products 17 are pushed together by the 5 removal plate. The proposed mold design provides the initial pushing of products in the zone of weak spots and the subsequent removal of the product from the forming surfaces, thereby overcoming the adhesion forces of the adhesion of the material to the casting with the forming surfaces. This prevents damage to products such as holes, chips and warping, and improves the quality of products. The return of the pusher to its original position after the initial pushing allows you to cast in the proposed molds a product of the type "cage longer than 1/3 stroke" to open the mold and with a complex configuration of the internal cavity and weakened elements. Claims of the Invention Mold containing a fixed plate with a decorating cavity, a movable plate with a decorating sign, a removal plate connected to the base plate, a pusher plate with pushers, characterized in that, in order to push long products, it is equipped with pushers in the plates and spring-loaded relative to each other sliders with tapered shanks, a sleeve with a tapered inner surface placed in the base plate and interacting with the tapered tails of the sliders, and springs installed between the sign plate and the cover plate and the removal plate is connected to a fixed plate limited movement with respect to it and provided with grips interacting with the sliders. Sources of information taken into account in the examination 1. Demin E. N. Handbook of molds. Lenizdat, 1967, p. No. 2. Technological equipment for cold stamping, pressing plastics and injection molding. Directory reference, Part-2. 1967, p. 125, fig. 99 (prototype). .