SU654428A1 - Mould for making polymeric articles with undercut portions - Google Patents

Description

stop 14. In the movable plate 3, the pin 15 is installed, which interacts with the sleeve 8. The insert, which forms the undercut, is made in the form of a forming part 16 located in the plate of the punch, a gland 17 fixed in the pushing plate 6 located between the forming part and the thrust and pivotally connected at one end to the thrust and the other end to the forming part. The position of the forming part is fixed by plate springs 19, which return the forming part after pushing the product B into a working position, which prevents it from being hit when the pushing plates with ejectors return to their original position. Column 20 serves to center the shape plates. Casting form works as follows. Polymeric material is injected into the closed form through the sprue bushing. After exposure form reveal. The movable part of it departs from the fixed plate, and the product remains on the punch. When moving the movable part of the form to the left, the stop 14 comes into contact

with an emphasis on the machine, the product is removed from the punch 5 with rod pushers 12, t 17, central pusher 9, after which the ball latch is activated. The balls 10, adjacent to the pin 15 and the sleeve 11 of the plate 7, come out of contact with the finger 15 and fully enter the cavity of the central sleeve 8. The product is held on the forming part 16, pivotally connected through the insert with the end 17. Thus, The first step is pushing. Slab 6 with rth 17 stops its movement. Upon further movement of the movable part of the form to the left, due to the second stage of collision (Fig. 2), the pushers 12 release the product from the forming parts 16 by rotating them in a hinge joint, after which the product falls into the maschine receiving device.

When the mold is opened, the hinged joint of the forming part 16 and the insert 18 extend beyond the plane of the mold plug (Fig. 2

This includes a forming part located in the punch plate and secured in a pushing plate, characterized in that, in order to increase productivity by reducing the time for replacing the forming part of the insert, it is provided with an insert between the thrust and forming part that is pivotally connected by one end with a pull, and the other end with a forming part.

2. Casting mold according to claim 1, characterized in that the ha is rigidly fixed on the pushing plate.

Sources of information taken into account in the examination

1. USSR author's certificate number 426849, cl. B 29 C 1/14, 1972.

2.N.N. Leikin. Designing of molds for plastics products. M.-L., “Mechanical Engineering, 1966, p. 221 - 222, p. 92. and 3), which makes it possible to quickly and easily disassemble the forming part of the insert in the place of its swivel joint with the insert. When the cycle is repeated, the mold mold closes, the ejector system returns to its original position. Then the cycle is repeated. The cooling of the mold B during the operation is carried out by the water circulating through the channels present in the die and the die. When the mold is opened, the hinge joint of the forming part and the insert extends beyond the plane of the mold's connector, which makes it possible to quickly and easily disassemble the liner without removing the mold from the maschine. fixed plates placed between them the punch plate and the pushing plate, and the undercut, which is movable along the axis of the shape of the insert (Рig.1

/ plane of the connector

n / iacxBcmi connector