The blow moulding machine is used to manufacture hollow bodies like bottles or other containers made out of plastic. The drink industry mainly uses PET bottles. Coupled with a blow moulding machine, these are manufactured using a bottling line. Three different processes are necessary for the industry: injection blow moulding; extrusion blow moulding; and stretch blow moulding. Using these processes, a variety of plastic hollow bodies with thermoplastic properties can be produced.
- Manufacturing of hollow bodies
- Injection blow moulding, extrusion blow moulding and stretch blow moulding are common processes
- Most common use is for the packaging industry for liquids
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A pre-formed mould is used to blow the workpiece into a specific form. Through the cooling of the plastic, the workpiece maintains its form. The blow moulding machine is made out of a frame and a corresponding mechanism used to transport the moulds. The finished bottles or thermoplastic containers are led out of the machine via conveyors. The bottling line is then used to fill up and label the finished bottles. Modern machines have an automatic steering system used for all the steps of the process, and the corresponding sensors are used to control the process. Bottles are normally produced using injection blow moulding. Extrusion blow moulding is used for the manufacturing of canisters, casks, oil tanks or similar parts. This process uses a tubular pre-formed mould that is used during the extrusion. The workpiece gains the shape of the pre-formed mould through the blow moulding process.