Screw head for injection molding machine

Details Screw head for injection molding machine Screw head for injection molding machine

B - Operations, Transporting

29

C

B29C 45/60 (2006.01)

Patent

CA 2143244

A screw head for an injection molding machine is mounted to a distal end portion of a screw, and includes a trunk portion and a screw portion, and an undercut portion formed between the trunk portion and the screw portion, wherein a relationship between a shaft diameter ~ of the undercut portion and a nominal diameter ~ of the screw portion is defined as: 0.74f ~ e ~ 0.85f and a relationship between the nominal diameter ~ of the screw portion and a radius ~ of curvature of the undercut portion is defined as: 0.5f ~ r

Cette invention concerne une tête de vis de machine à mouler par injection montée à l'extrémité distale d'une vis et comprenant une tige, une partie filetée et une partie rétreinte entre la tige et la partie filetée, le rapport entre le diamètre ~ de la partie rétreinte et le diamètre nominal ~ de la partie filetée étant comme suit : 0.74f ~ e ~ 0.85f; et le rapport entre le diamètre nominal ~ de la partie filetée et un rayon de courbure ~ de la partie rétreinte étant 0.5f ~ r.

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