Publish Time: 2022-11-15 Origin: Site
The unique design of the PET preform moulds eliminates the need to cool and reheat the hot runner during part changes, thus significantly reducing system downtime. It also reduces costs by minimizing the number of components to replace, while easily adapting to any preform length. Replacement time can be reduced to one-third of the time required to replace conventional molds.
What are the technological characteristics of PET preform mould?
What is the feature of the PET Preform mold?
What are the production characteristics of PET preform mould?
1.PET preform mould is generally used for blow moulding. If it is used for injection molding, injection molding grade plastics are used, because injection molding grades are better in fluidity.
2. The temperature of PET preform mould is generally between 280-290. If the temperature is too low, the transparency of the product is not good, and if it is too high, it is easy to change color.
3. Since PET preform mould is a crystalline material, it cools quickly. Therefore, rapid injection is generally required during injection molding.
4. Due to the fast cooling, the cold material is prone to dislocation at the water inlet. Therefore, the mold is preferably a hot runner.
Precision temperature controlling and even heating area for hot manifold
Improved valve gate system with interchangeable and durable melt PET material sealing
Germany heating elements high quality for longest mould lifetime
1. Special screw and injection molding machine with separate temperature control nozzle should be used;
2. The injection temperature should be higher if the plastic resin does not decompose;
3. Injection pressure: generally higher to overcome the defect of high melt viscosity, but too high pressure will cause internal stress to cause demolding difficulties and deformation;
4. Injection speed: in the case of satisfying the mold filling, it should generally be low, and it is best to use slow-fast-slow multi-stage injection;
5. Pressure holding time and molding cycle: In the case of satisfying the product filling and no dents and bubbles; it should be as short as possible to minimize the residence time of the melt in the barrel;
6. Screw speed and back pressure: under the premise of satisfying the plasticization quality, it should be as low as possible to prevent the possibility of degradation;
7. PET preform mould temperature: The cooling quality of the product has a great impact on the quality, so the mould temperature must be able to precisely control the process. If possible, the PET preform mould temperature should be higher.
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