Balanced multi-cavity injection molding of ridged-wall plastic p

Details Balanced multi-cavity injection molding of ridged-wall plastic p Balanced multi-cavity injection molding of ridged-wall plastic p

1996-01-10

1999-01-12

Heitbrink, Jill L.

Plastic and nonmetallic article shaping or treating: processes

With measuring, testing, or inspecting

264 404, 2642972, 2643288, 425140, 425572, 425577, 425588, B29C 4580

Patent

active

058582860

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: 3194468 (1965-07-01), Baron
patent: 3495736 (1970-02-01), Ragettli
patent: 4935188 (1990-06-01), Sorensen
patent: 5015426 (1991-05-01), Maus et al.
patent: 5267685 (1993-12-01), Sorensen
patent: 5336078 (1994-08-01), Catoen
patent: 5549857 (1996-08-01), Kamiguchi et al.

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