Plastic Technologies Handbook: Processing of Thermoplastics

Showing posts with label Processing of Thermoplastics. Show all posts

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...

In extrusion operations, a solid thermoplastic material is melted, forced through an orifice (die) of the desired cross section, and cooled....

Processing involves the conversion of the solid polymer into a desirable size and shape. There are a number of methods to shape the polymer,...