SU797884A1 - Mould for making polymeric articles - Google Patents

Description

(54) CASTING FORM FOR MANUFACTURING POLYMERIC PRODUCTS

one

The invention relates to the manufacture of products. Thermoplastic materials and can be used to make large-sized hollow articles by injection molding on injection molding machines.

A casting mold for the manufacture of polymer products is known, containing movable and non-directional plates, the removal unit and the liner submarine.

The known form contains an additional plate associated with a plate for removing pushers. The presence of an additional plate reduces the amount of movement of the plate plate, which eliminates the removal of products having a greater height.

The purpose of the invention is the expansion of technological capabilities by ensuring the removal of high products.

The goal is achieved by the fact that the casting mold for the manufacture of polymer products, containing a movable and fixed plates, a stripping plate and a shank, is provided with

MOBILE plate central hydraulic cylinder, a piston which is fixed on the shank, and installed on the plate. Those are removed by additional hydrocylands, the piston rods of which are fixed on the movable plate, and their piston cavities are in communication with the cavity of the central hydraulic cylinder.

Piston cavities centrals-ego and additional hydraulic cylinders reported

0, a longitudinal channel formed in the movable plate communicating with an axial channel formed in the piston rod of each additional hydraulic cylinder.

The drawing shows the form in the closed position.

Claims (2)

The casting mold comprises a fixed plate 1 with a plate 2 fixed on it 2, a movable plate 3 rigidly connected with the plate of the punch 4, a plate 5 removed. On the movable plate 3 there is a central hydraulic cylinder 6, the piston 7 of which is fixed on the shank 8, and 37 additional hydraulic cylinders 9 are installed on the removal plate, the piston rods 10 of which 11 are mounted on the mobile plate and are each made with an axial channel C3 (which communicate through the channel B movable plate piston cavities C and (additional and central hydraulic cylinders. The nut 12 serves to limit the stroke of the shank 8, and the nut 13 of the additional hydraulic cylinder for guiding and limiting the VIE stroke of the piston rod 1O of the piston 11. Cavity The mold is filled as follows: After pressing the polymer into the molding cavity and the appropriate exposure, the mold is opened. Moving plate 3 with plate of punch 4 moves away from stationary plate 1. At the same time, tail 8 comes up against a stationary support of injection molding the machine, and the plate 3 continues to move, and the shank enters the central hydraulic cylinder 6, creating in its cavity a pressure of fluid that flows through the channels B and Cf into the piston cavity 0 of the additional hydraulic fluid. As a result of the fluid pressure, the hydraulic cylinders 9 move the plate 5 off. Thus, products are removed from the punch 4. The volume of the fluid displaced from the cavity d is equal to the total volume of the fluid entering the cavity G Y .. n-Y. ts c 7 where Vij is the volume of fluid displaced from the cavity (7 VP is the volume of fluid that entered the cavity C P is the number of lateral hydraulic cylinders. / V cT W C 4 W S rde is the diameter of the central hydraulic cylinder stem (3 is the diameter of the additional rod the first hydraulic cylinder Qj. —the stroke of the central cylinder guide of the plate removal and a.s.S.PI) The dependence expressed by equation (1) allows determining the ratio of the values of D, 3 ii for a given movement of the removal plate S б P b of these values, so that the rate of removal of the product from the mark was less, equal or more the mold speed of the mold. When the mold is closed, the 2 matrix plate returns: in the opposite direction from the cavities Q to the cavity d. The shank 8 is set to its original position. The mold is ready for the next lithium cycle. height, since it is possible to change the course of the removal plate by selecting the diameters of the hydraulic cylinders. 1. Injection molding form for the manufacture of polymer products, containing movable and fixed plates, removal and a shank, characterized so that, in order to expand technological capabilities by ensuring the removal of high products, it is equipped with a central hydraulic cylinder, which the piston is mounted on the shank, and additional hydraulic cylinders mounted on the removal plate, the piston rods of which are mounted on the mobile plate, their cavities are communicated with the cavity of the central hydraulic cylinder. 2. A form according to claim 1, characterized in that the piston cavities of the additional and central hydraulic cylinders are communicated by a longitudinal channel formed in the movable plate that communicates with an axial channel formed in the piston rod of each additional hydraulic cylinder. Sources of information taken into account in the examination 1. Technological equipment for cold forming, pressing plastics and casting under pressure. Directory reference. NIIMASH, 1967, Part 4, G 123, sketch (prototype).