Balanced multi-cavity injection molding of like plastic products

Details Balanced multi-cavity injection molding of like plastic products Balanced multi-cavity injection molding of like plastic products

1997-09-17

1999-03-09

Heitbrink, Jill L.

Plastic and nonmetallic article shaping or treating: processes

Mechanical shaping or molding to form or reform shaped article

Forming plural articles

2643288, 26432812, 425572, 425575, 425588, B29C 4537

Patent

active

058796134

ABSTRACT:
Balanced injection molding in a multi-cavity mold of a plurality of ridged-wall products having is accomplished by providing mold parts defining therebetween at least two cavities for forming the ridged-wall plastic products, wherein each of at least two cavities defines a plurality of flow channels in which injected plastic material flows within the cavity and in which flow channels the first side strips are formed; wherein the relative disposition of the mold parts is adjustable for adjusting the dimensions of the flow channels in at least two mold cavities separately so that when plastic material is injected approximately simultaneously into the at least two mold cavities the injected plastic material flows within the at least two cavities at respective flow rates that cause the at least two mold cavities to be completely filled approximately simultaneously with the injected plastic material.

REFERENCES:
patent: 5518389 (1996-05-01), Nonomura et al.
patent: 5792409 (1998-08-01), Sorensen et al.
Pye, R.G.W. "Injection Mould Design" 1968, ILIFFE Books ltd. London XP-00207646 p. 148.

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