Method for exerting stress tensor to molding material

Plastic and nonmetallic article shaping or treating: processes – With measuring – testing – or inspecting

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264 406, 264 69, 2643288, 26432814, 26432819, B29C 4576, B29C 4518

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055430929

ABSTRACT:
A method is disclosed for exerting a stress tensor on moldable material in a mold cavity. The method involves the steps of feeding a moldable material from a feeder to an accumulator. The material is preferably melted prior to accumulation within the accumulator so as to form a material flow. After at least a portion of the accumulator is filled, an oscillatory force is applied on the molten material in accordance with a predetermined program. A predetermined amount of material is then fed from the accumulator to a mold cavity through a mold inlet. The temperature of the mold is controlled in accordance with a predetermined program while an oscillatory force is applied to the material. The solidified article is then removed from the mold.

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