Plastifying and injection unit for injection moulding...

Details Plastifying and injection unit for injection moulding... Plastifying and injection unit for injection moulding...

B - Operations, Transporting

29

C

B29C 45/58 (2006.01) B29C 45/24 (2006.01) B29C 45/53 (2006.01)

Patent

CA 2150595

A plastifying and injection unit for injection moulding machines that are used to manufacture rubber or plastic articles with a plastifying screw (13) that can rotate within a screw cylinder (14) and move axially into a chamber (5) ahead of the screw, which has at its end that is proximate to the chamber (5) ahead of the screw a non-return valve that can move synchronously with it; that ahead of the non-return valve (27), as viewed in the direction of flow of the plastified rubber or plastic, there is a sieve-like filter device (28) that completely covers the unobstructed cross-section for the flow of plastified rubber or plastic, this being so arranged that it can move synchronously with the plastifying screw (13) and the non-return valve (27) into the chamber (5) that is ahead of the screw.

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