Plastic article or earthenware shaping or treating: apparatus – Control means responsive to or actuated by means sensing or... – Feed control of material en route to shaping area
Patent
1995-04-18
1998-06-30
Heitbrink, Tim
Plastic article or earthenware shaping or treating: apparatus
Control means responsive to or actuated by means sensing or...
Feed control of material en route to shaping area
2642972, 2643288, 26432815, 425549, 425564, 425572, B29C 4522
Patent
active
057730385
ABSTRACT:
An apparatus and method for sequentially molding a plurality of plastic articles within a single mold unit. A first mold section is provided with a runner system and a plurality of gates and a second mold section is provided with a plurality of recesses in operable alignment with the gates of the first mold section. When the second mold section is clamped into mating engagement with the first mold section, a plurality of discrete mold cavities are formed, each having at least one corresponding gate provided on the first mold section. A central processing unit signals an injection assembly as to the proper injection parameters for each discrete mold cavity. The central processing unit opens the gates sequentially, with each discrete mold cavity being filled according to its own set of injection parameters. By the present method, it is possible to mold a plurality of articles having different injection parameters, while using a single mold unit. The present method also makes it possible to mold the small articles without having to overfill the mold cavity, which could result in defective products or damage to the mold unit. Because the present method can be used to mold a plurality of small sets of small articles, more precision can be obtained than with the prior art method of filling one large set of small articles.
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Gilchrist Michael C.
Heitbrink Tim
Herink Kent A.
Laurenzo Brian J.
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