Plastic and nonmetallic article shaping or treating: processes – Mechanical shaping or molding to form or reform shaped article – To produce composite – plural part or multilayered article
Patent
1989-08-14
1991-07-09
Heitbrink, Jill L.
Plastic and nonmetallic article shaping or treating: processes
Mechanical shaping or molding to form or reform shaped article
To produce composite, plural part or multilayered article
2642972, 2643288, 26432811, 4251291, 425130, 425134, B29C 4510, B29C 4512, B29C 4516
Patent
active
050304062
ABSTRACT:
A method of cyclic injection molding enables production of four or more products in each production cycle while the filling of each mold cavity may be separate and therefore may be fully controlled. Multicomponent products are molded in an injection molding system that includes a mold positioning system, a first injection system and a second injection system, and a left molding block, a right molding block and an intermediate molding block located between the left and the right molding blocks, with the blocks being disposed along a common axis for axial movement in respect to each other. The left molding block defines a first left general mold cavity part and the intermediate molding block defines a first left gated mold cavity part and a second left gated mold cavity part. The right molding block defines a first right general mold cavity part and the intermediate molding block defines a first right gated mold cavity part and a second right gated mold cavity part. The mold positioning system combines the molding blocks so that the first left general mold cavity part is connected with the first left gated mold cavity part to form a first left mold cavity, the first right general mold cavity part is connected with the first right gated mold cavity part to form a first right mold cavity, the first left general mold cavity part is connected with the second left gated and mold cavity part to form a second left mold cavity, which encompasses the first left plastic component, and the first right general mold cavity part is connected with the second right gated mold cavity part to form a second right mold cavity, which encompasses the first right plastic component.
REFERENCES:
patent: 4400341 (1983-08-01), Sorensen
patent: 4744741 (1988-05-01), Glover et al.
patent: 4885121 (1989-12-01), Patel
patent: 4935184 (1990-06-01), Sorensen
Callan Edward W.
Heitbrink Jill L.
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