22/10/09
Briefly describe the types of hollow blow molding
The blow molding process can be divided into the following four types according to the working principle of the blow molding machine:
The blow molding process can be divided into the following four types according to the working principle of the blow molding machine:
1: Extrusion blow molding process:
Three-quarters of blow molded products are currently extrusion blow molded. Manufactured with plastic process. Extrusion blow molding is divided into continuous extrusion blow molding and intermittent extrusion blow molding. Continuous extrusion blow molding is suitable for the rapid production of small products, as well as for the continuous manufacture of parisons and molds using extruders. The blanks enter the split mold one by one on the turntable, and then perform operations such as mold clamping, inflation, cooling, and ejection. Polyethylene large container.
2: Injection blow molding process:
Injection blow molding is obtained by parison injection molding. The advantages of injection blow molding are uniform wall thickness, tight weight tolerances, and less post-processing. ,reduce waste. However, injection blow molding has a high cost, so it is suitable for mass production of small refined products, such as medicine bottles, cosmetic bottles, etc.
3: Stretch blow molding process: China plus blow molding machine.
Stretch blow molding is divided into injection stretch blow molding and extrusion stretch blow molding. Injection stretch blow molding is the stretch blow molding of the parison obtained by injection molding;
4: Multi-layer blow molding process: plastic hollow machine.
Multi-layer blow molding is to use several plastics to make multi-layer composite parisons in an appropriate way, and then shape them by a general blow molding process. Layer blow molding is the introduction of one or more layers of low permeability polymers to improve the solvent resistance or breathability of the article.
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The future of blow molding machines will be brighter
The sales volume of blow molding machines in recent years has been better than before. At present, my country's blow molding machine manufacturers have developed their own core systems for blow molding machines, while the high-end market is just the opposite. one part.
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