초록 ▼

An injection molding process for making a multiple layer, plastic structure. A plastic sleeve is placed and then enclosed in a mold cavity. A flowing heated plastic is conducted into the mold cavity, radially inside the sleeve, and forced radially outward against the sleeve. The flowing plastic forc

An injection molding process for making a multiple layer, plastic structure. A plastic sleeve is placed and then enclosed in a mold cavity. A flowing heated plastic is conducted into the mold cavity, radially inside the sleeve, and forced radially outward against the sleeve. The flowing plastic forces the sleeve outward and forms, with the sleeve, an integrally bonded laminated structure. The mold is opened and the plastic structure is removed, and this structure may then be reformed to form a container particularly suitable for containing beverages, foods, cosmetics, pharmaceuticals and chemicals.

대표청구항 ▼

An injection molding process for making a multiple layer, plastic structure, and for use with a mold forming a mold cavity and including an axially extending cavity surface forming at least a portion of the mold cavity, said cavity surface having a substantially cylindrical shape tapering axially up

An injection molding process for making a multiple layer, plastic structure, and for use with a mold forming a mold cavity and including an axially extending cavity surface forming at least a portion of the mold cavity, said cavity surface having a substantially cylindrical shape tapering axially upwardly outwardly, the method comprising the steps of: providing a plastic tube; cutting off a portion of the plastic tube to form a hollow, plastic sleeve having an initial, generally hollow cylindrical shape and including first and second opposite, open axial ends; placing the plastic sleeve in the mold; closing the mold to enclose the sleeve in the mold cavity; conducting a flowing, heated plastic into the mold cavity and through the first open axial end of the sleeve and into the interior thereof; forcing the flowing plastic radially outward against the sleeve to force the sleeve outward from said initial shape and into a shape conforming with the shape of said cavity surface, and to form, with the sleeve, an integrally bonded laminated structure; opening the mold; and removing the structure from the mold.