According to the process combination of blow molding machine, it can be divided into three categories: extrusion blow molding machine, injection blow molding machine and special structure blow molding machine.The stretch blow molding machine can be classified into each of the above categories.
(1) Extrusion blow molding machine
Extrusion blow molding machine is a combination of extrusion machine, blow molding machine and clamping system with the extruder, the parison die head, blowing device, clamping mechanism, parison thickness control system and drive mechanism.The mold head is one of the important parts to determine the quality of blow molding products, usually with side feed mold head and intermediate feed mould head.
(2) Injection blow molding machine
Injection molding machine is a combination of injection molding machine and blow molding mechanism, including plasticizing mechanism, hydraulic system, control electrical apparatus and other mechanical parts.The common types are three - station injection blow molding machine and four - station injection blow molding machine.The plastic container produced by injection moulding machine is accurate and requires no secondary processing, but the mould cost is higher.
(3)Stretch blow molding machine
Stretch blow molding machine is used to produce PET bottles and so on.The stretch blow molding machine is composed of heating components, transmission components and blow molding components, and has up to 16 mold stations.