Plastic molding
From Plastics Wiki, free encyclopedia
Molding The forming of a resin/fiber material into a solid mass of prescribed shape and size. Molding or casting is the process of manufacturing by shaping pliable raw material using a rigid frame or model called a mold.
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Types of plastic molding processes
Injection molding
IM A repetitive process in which plastic is melted and injected into a mold cavity where the article is cooled down. After cooling, the mould opens and the article is ejected.
- Reaction Injection Molding RIM
- Liquid injection molding LIM
- Gas assist injection molding
- Co-injection molding
- 2-Shot Injection Molding
- Micro Injection Molding (micromolding)
Blow molding
BM Process of inflating a hot, hollow, thermoplastic preform or parison inside a closed mold so its shape conforms to that of the mold cavity. A wide variety of hollow parts, including plastic bottles, can be produced from many different plastics using this process.
- Stretch blow molding SBM
- Extrusion blow molding EBM
- Injection blow molding IBM
- Reheat blow molding RBM
Other
- Rotational molding RM
- Laminating LM
- Expandable bead molding EBM
- Foam molding FM
- Vacuum plug assist molding VPAM
- Pressure plug assist molding PPAM
- Matched mold
- Contact molding
- Compression molding CM
- Transfer molding TM
- Vacuum-assisted resin transfer molding VARTM
- Extrusion molding EX
- Dip molding
The Mold
A mold or mould is a hollowed-out block that is filled with a liquid like plastic, glass or metal. The liquid hardens or sets inside the mold, adopting its shape. A mold is the opposite of a cast (see casting). The manufacturer who makes the molds is called moldmaker or mouldmaker.
