Pet Preform Mold Making Details
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    • Last updated September 5, 2018
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Pet Preform Mold Making Details

Posted By preform nicole     September 5, 2018    


In the process of making the whole Pet Preform mold, there are actually many problems encountered. Today, let me talk about some details that need to be paid attention to during the mold making process:


The polishing of the mold is the last step in the manufacture of the mold. Polishing is directly reflected on the plastic parts, so this is the most face-to-face job. Polishing also helps and complements the mold movement, especially for demolding. Often some mold production is not smooth because the lighting is not in place, the resistance is too large, the demoulding is difficult, and even the white, the top crack and so on.

2. Mold assembly

Mold assembly is like assembling a machine. Every component and every screw can't go wrong. Otherwise, the consequences will be quite serious. Lightness will lead to product defects, affecting production, and completely damage the mold and cause scrapping. Therefore, the assembly work must be very detailed. In the assembly process, especially pay attention to the cleaning of the mold, especially the waterway and screw holes. Be sure to blow off the iron filings inside.

3. Hot runner or cold runner

This actually has the least impact on the quality of the mold, because the hot runners are generally branded by customers, especially some big customers. Well-known foreign brands do a good job in quality and after-sales service, so there is generally no problem in quality. However, some domestic hot runners have a very different quality. In order to save costs, individual small enterprises strive for price advantages, and with some unreliable heating and conduction accessories, problems are easy to occur. The main problem with cold runners is how to ensure the balance of injection molding, gate size, injection pressure and so on.

4. Cooling waterway

Anyone with experience in mold knows how important cooling is to a mold. Due to the increase in prices and labor wages, it is unthinkable to reduce the profit from the one-second injection cycle when mass-produced products. However, accelerating the production cycle will lead to an increase in the temperature of the mold. If it is not effectively controlled, the mold will be too hot to be formed, and even the mold deformation will be scrapped. Therefore, excellent waterway design is particularly important, including the arrangement density, diameter, and links between the waterways.

5. Mold maintenance

Mold maintenance is mainly maintenance and maintenance during the production process. The mold is like a car. If it is not used for a long time without maintenance, it may cause the mold to be scrapped. Therefore, every time the mold is used, it must be fully maintained, especially the rust prevention of the molded part and the rust prevention of the main moving parts. Because the mold has to be watered during the production process, water may be supplied to the mold during the installation or disassembly process, so it is necessary to ensure that the mold is dry and then brush a layer of oil protection.

If you want to have a more intimate after-sales service, choose the Chinese pet preform manufacturer, JiLian (  will bring you meticulous after-sales service with a professional.