SU1211066A1 - Apparatus for injection moulding of rubber articles - Google Patents

Description

The invention relates to the manufacture of rubber products and can be used, in particular, for the manufacture of reinforced products.

The aim of the invention is to increase the productivity of the device by providing the possibility of vulcanization and molding products on one press

The drawing shows the proposed injection molding apparatus for rubber products.

The device comprises molds 1 with loading chambers 2, mounted on the bottom plate 3, and plungers 4 centered with them, mounted on the top plate 5, the molds are fixed on the bottom plate by means of guides 6-8 and clamps 9 The plungers 4 are provided with annular elastic gaskets 10, for example rubber, located on the lateral surface of the plungers at the ends in contact with the material. The outer diameter of the annular gaskets exceeds the inner diameter (i.e., the cavity diameter) of the loading chambers by an amount that eliminates the gap between the walls of the chambers 2 and the plungers when the molds are closed.

The device works in the following way.

On the plate 3, the presses of the form 1 are installed and along the guides 6, 7 and 8 are pushed up to the latches 9. In the loading chambers 2 fixedly mounted on the molds 1, V. Composer V. Baturov Editor L. Povkhan Tekhred J. Kastelevi G. Corrector T. Kolb

Order 589/20 Tirazk 640Subscription

VNIIPI USSR State Committee

for inventions and discoveries 113035, Moscow, Zh-35, Raushsk nab., 4/5

Filial PSh1 Patent, g, Uzhgorod, st. Project, 4

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a rubber mixture is put in an amount equal in volume to the manufactured products m. The upper press plate (not shown), on which the plate 5 is fixed with the plungers 4 mounted on it, is lowered. When the press plates are closed, the plungers 4 enter the loading chambers -1 to 2 and squeeze the entire rubber mixture through the gating channels from the loading chambers 2 into the forming cavities of the mold 1, and the gaskets 10 on the plungers 4 provide sealing between the loading chambers 2 and plunger 4, which contributes to obtaining high-quality products that do not require further machining. After the completion of the molding cycle, the process of vulcanization of the products is carried out without opening the press plates. Upon its completion, the mold 1 is pushed out of the press along the guides, opened and the products are removed. The molds then slide back into the press and the process repeats. During operation, the restoration and sub-scouring of abrasive pads occurs, allowing them to be used for a long time without replacement, as well. also be made of the material of which the products are made. The presence of gaskets on the side surface of the plungers permits precise dosing of the volume of material in the forming cavities of the molds and, as a result, combines the operations of forming and vulcanizing products.

Claims (1)

A device for injection molding rubber products containing a mold, a loading chamber, a plunger and an elastic gasket located on the plunger, characterized in that, in order to increase the productivity of the device due to the possibility of vulcanization and molding of products on one press, an elastic gasket is installed on the lateral surface of the plunger and made in the form of a ring with an outer diameter greater than the diameter of the boot cavity <o 1-21 1066