B - Operations – Transporting – 29 – C
Patent
B - Operations, Transporting
29
C
18/682
B29C 45/16 (2006.01) B29C 45/06 (2006.01) B29C 45/18 (2006.01) B29C 45/53 (2006.01) B29C 45/54 (2006.01)
Patent
CA 2029236
HIGH CAPACITY INJECTION MOLDING ABSTRACT OF THE DISCLOSURE An injection molding machine has a high volume cylinder with a piston slidably disposed in the cylinder. The piston is formed with channels and check valves for selective communication from the back of the cylinder to the front of the cylinder. A vertically disposed screw plasticizer provides molten thermoplastic material to the back of the cylinder, which material flows to the front of the cylinder with rearward movement of the piston. When the front of the cylinder is filled with thermoplastic material, the piston is moved forewardly to inject the thermoplastic material into a mold. A reciprocating screw plasticizer first assists in filling the front of the cylinder, and then in completing the injection molding under a high pressure. Novel composite thermoplastic products may be produced.
Bm Corp.
Farrell John J.
Johnson Douglas S. Q.c.
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