Plastic Technologies Handbook: 2011-03-20

Sunday, March 20, 2011

Rotational molding, also known as rotomolding or centrifugal casting, involves filling a mold cavity, generally with powder, and rotating th...

Blow molding is a technique for forming nearly hollow articles and is very commonly practiced in the formation of PET soft-drink bottles. It...

Thermoforming is the heating of a thermoplastic sheet until it is soft and stretchable and then forcing the hot sheet against the contours o...

Two-shot or overmolding refers to a process whereby either different colors or different materials are molded into one part. In this process...

Coinjection molding refers to a process whereby two materials are injected into the same cavity. The first material is injected into the cav...

In gas-assisted injection molding the mold is partially filled with polymer, followed by a gas, which presses the polymer out to the surface...

Products that are hollow or contain complex undercuts can be fabricated using the lost-core process as illustrated in Fig. 1.24. Core materi...

Injection/compression molding refers to the process wherein the cavity is not completely filled during injection of the resin. In this proce...

Injection molding is a widely used process to produce parts with variable dimensions. An injection molding machine consists of the following...