Abstract:
A feed system for an injection molding machine. The feed system includes a first part with a first channel, and a second part with a second channel. The first channel and the second channel together form a molten plastic feed conduit when they are engaged. The first part and the second part are unbonded to one another.
Abstract:
Injection molding at substantially constant pressure with the use of rapid heating techniques, such as induction heating, at strategic locations within a mold to heat molding surfaces in a manner that mitigates problems typically associated with flow filling challenges.
Abstract:
A feed system for an injection molding method and machine includes a first part including a first channel, and a second part including a second channel, the first channel and the second channel forming a molten plastic feed conduit when the first part is located adjacent to the second part. A joint is formed between the first part and the second part along the first channel and the second channel and the joint is one of a sintered joint, a welded joint, and a brazed joint.
Abstract:
A method for injection molding overmolded articles includes heating thermoplastic material to a predetermined temperature in an injection molding apparatus (10). The injection molding apparatus has a mold (28) including a mold cavity (32). The injection molding apparatus (10) has a useful life of more than about 1 million injection molding cycles and less than about 20 million injection molding cycles. The method further includes positioning a pre-manufactured article (51) in the mold cavity (32), advancing heated thermoplastic material from the melt holder (20) of the injection molding apparatus (10) into the mold cavity (32) maintaining a substantially constant melt pressure in the proximity of the injection element (30) of at least about 400 pounds per square inch (about 2 MPa) and at most about 10,000 pounds per square inch (about 69 MPa).