Injection molding machine with multichannel wave screw

Details Injection molding machine with multichannel wave screw Injection molding machine with multichannel wave screw

B - Operations, Transporting

29

F

18/695

B29F 1/02 (1980.01)

Patent

CA 1143524

ABSTRACT OF THE DISCLOSURE An injection molding apparatus is disclosed which in- cludes a screw having a multichannel wave screw suction. In the wave screw section, a helical passage defined by a radially extending helical screw flight is divided into a pair of flow channels by a radially extending helical barrier. The helical barrier is radially shorter than the helical conveying flight and the effective outer width therof is axially narrower than the helical conveying flight. Each flow channel is provided with an undulating base surface that defines a plurality of wave cycles. The base surface varies in a radial direction between a valley portion and a crest portion for the wave cycle and a wave cycle is defined as extending between consecutive crest portions. The crust portions of one flow channel are helically displaced from the crest portions fot he adjacent flow channel.

342806

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