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A finished PET drink bottle compared to the preform from which it is made. There are two basic molding methods for PET bottles, one-step and two-step. In two-step molding, two separate machines are used. The first machine injection molds the preform, which resembles a test tube, with the bottle-cap threads already molded into place.
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The blow molding process. Blow molding (or moulding) is a manufacturing process for forming hollow plastic parts. It is also used for forming glass bottles or other hollow shapes. In general, there are three main types of blow molding: extrusion blow molding, injection blow molding, and injection stretch blow molding.
This ranges from bottle design and production, including mould making, to fully automatic packaging machines. ALPLA was a pioneer in the switch from PVC to PET in the form of the first two-stage PET bottle. The company is also involved in the research, development and production of alternative, bio-based and biodegradable packaging materials.
Manufacture of PET-pellets or flakes for bottles (bottle to bottle) and A-PET [ edit ] This process is, in principle, similar to the one described above; however, the pellets produced are directly (continuously or discontinuously) crystallized and then subjected to a solid-state polycondensation (SSP) in a tumbling drier or a vertical tube reactor.
Simplified diagram of the process Injection moulding (U.S. spelling: injection molding ) is a manufacturing process for producing parts by injecting molten material into a mould, or mold . Injection moulding can be performed with a host of materials mainly including metals (for which the process is called die-casting ), glasses , elastomers ...
It specialises in manufacturing blow-moulding for production of PET bottles, plus fillers, labellers, pasteurisers, bottle and crate washer, packers, craters, and palletizers machines. The company has 50 offices and 5,487 employees, nine research centres and over 40,000 machines installed in more than 190 countries (2018).
Compression molding is a method of molding in which the molding material, generally preheated, is first placed in an open, heated mold cavity. The mold is closed with a top force or plug member, pressure is applied to force the material into contact with all mold areas, while heat and pressure are maintained until the molding material has cured; this process is known as compression molding ...