SU1680545A1 - Casting mould for manufacturing polymeric articles - Google Patents

Abstract

The invention relates to molds for the manufacture of polymer products. The purpose of the invention is to enable the manufacture of flat products with a central opening of small diameter. For this, the decorating element is made with a flat end face, in the plane of which the end of the gate ejector is located, with the openings of the tunnel sprue channels located in the plane of the output section of the central sprue channel. The outlets of the gating channels are located on the forming surface of the decorating element. During the mold closure, the product together with the sprue is removed from the mold, with the tunnel sprues being separated from the product. 5 il.

Description

The invention relates to a tooling for the production of injection molded polymer articles.

The purpose of the invention is to enable the manufacture of flat products with a central hole of small diameter.

Figure 1 shows the casting form in the closed position, a longitudinal section; figure 2 - the same, in the open position; Fig. 3 shows a node I in Fig. 1 (tunnel gating channels; Fig. 4 is view A in Fig. 3; Fig. 5 is a decorating element and bushing with a central sprue channel;

The form contains a stationary half-form with a sleeve 1 with a central sprue channel 2 and a semi-matrix 3 and a movable half-form with a decorating element 4 arranged coaxially with the central gating channel 2, in which tunnel gating channels are made and the ejector 5 of the sprue is located, with the inlet aperture and six gates made on the end surface

and the output 7 is on the forming surface.

The decorating element 4 is made with a flat end face, in the plane of which the end of the ejector 5 of the sprue is located, while the inlets 6 of the sprues channels are located in the plane of the exit section of the central sprue channel 2.

The ejector system includes ejection plates 8 with ejectors 9 and 5, respectively, of the product and the sprue.

This design solution allows the manufacture of flat products with a central hole of small diameter, since the possibility of detachment of the tunnel sprues from the central one is excluded. The use of inserts with tunnel channels in a known form does not allow a reduction in the size of the design element.

The form works as follows.

After polymer injection and processing time, the mold is opened. After

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Claims (1)

the stopping of the pushing plates by the pushers 9 and 5 removes the product and the sprue, thus separating the tunnel sprues from the product, which remain associated with the central sprue. Formula of the Injection Molding mold for the manufacture of polymer products, comprising a fixed mold with a sleeve with a central sprue channel and a semi-matrix and a movable half mold with a decorating element located in an axial central sprue channel, in which tunnel gates and there is an ejector of the sprue, while the inlet apertures of the gating channels are made on the end surface of the design element and the output on the Forming surface, which is designed so that, in order to make it possible to manufacture flat products with a central hole of small diameter a flat end face, in the plane of which the end face of the gate ejector is located, while the inlets of the gate channels are located in the plane of the exit section of the central gate channel. t 5s 04 t s Cfc fc: "