SU880776A1 - Mechanism for shaping articles from polymer materials - Google Patents

Description

I

The invention relates to a device for molding articles from polymeric materials, for example, table tennis.

A press is known for q / grinding and vulcanization of rubber mites, containing a multi-seat mold with two floors of heated hemispheres, a movable half-form with heated hemispheres; the drive of vertical reciprocating movement of the movable half-form and the air supply {.

This design of the mold does not ensure the smooth molding of articles due to the loose closing of the mold.

Closest to the invention. is a device for molding articles from polymeric materials, containing a multi-mold, including upper and lower mounting plates, in the slots of which half-molds are installed, with the half-shapes of one of the plates mounted axially 2).

This device also does not provide a layerless pressing due to the loose closing of the half-molds.

The purpose of the invention is to provide pressureless pressing due to tight closing of the half-molds.

5 The goal is achieved by the fact that in a device for forming articles of nz polymeric materials containing a multi-mold, including upper and lower mounting plates, in the slots of which half-molds are installed, moreover half-molds

About one of the plates are mounted with the possibility of axial movement, the movable half-forms are equipped with spring-loaded sealing rings mounted on their lateral surface, and the mounting plate in which they are installed is made with a cavity,

 connected to the compressed air system.

The semi-molds have conical surfaces of the closure. In addition, the mobile half-molds are filled with annular grooves for spring sealing rings.

Claims (2)

On fmg. 1 given device, general view; in fig. 2 shows section A-A in FIG. .one. The device for molding articles from polymeric materials consists of a bed I, a multi-mold, including a lower mounting plate 2, an upper mounting plate 3, guides 4, a drive 5 of closing and breaking the upper mounting plate 3 with the lower mounting plate 2. In the sockets the plates 2 are fixed to the half-form 7, in the slots of the plate 3 - the mobile half-forms 8 with spring rings 6 placed on their side surface. In the plate 3 there is a cavity 9 connected to the air supply system. The upper mounting plate 3 and the lower mounting plate 2 have channels 10 for supplying heat transfer fluid. „Half-shapes 7 and 8 have conic closure surfaces. The device works as follows. When raising the plate 3 in the half-form 7 of the plate 2 is placed billet, lower the plate 3, while there is a closure of the upper and lower plates. Compressed air is supplied to the cavity 9, the movable half-molds 8 are closed with the fixed semi-molds 7 along conical surfaces. Hot coolant is fed into the channels 10, products are formed within the required time. At the end of the molding, cold coolant is supplied to the channels 10. After cooling, the pressure in the cavity 9 is relieved and the lift is made 3. The preforms are removed. Then the cycle repeats. This device for molding articles from polymeric materials provides layer-free pressing due to tight closing of the subforms, improves the quality of the products. Claim 1. Device for molding articles from polymeric materials, containing multi-mold, including upper and lower mounting plates, in the slots of which half molds are installed, half-molds of one of the plates are arranged with the possibility of axial movement, characterized in that pressing due to the tight closing of the half-molds, the mobile half-forms are equipped with spring rings installed on their lateral surface, and the mounting plate in which they are installed, made It is provided with a cavity communicated with a compressed air supply system. 2. A device according to claim 1, characterized in that the molds have tapered closing surfaces. 3. The device according to PP. I and 2, characterized in that the moving half-molds are made with annular grooves under the spring sealing rings. Sources of information. Taken into account during the examination 1. USSR author's certificate No. 642207, cl. In 29 N 7/02, 1977. 2. USSR author's certificate number 194296, cl. In 29 C 1/00, 1965 (prototype).