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Plastic Pet Mold - How to Make a Valve Gate, Crystalline, Or Hot Runner Mold

When it comes to plastic pet mold, you have a few  This mold is designed with a hot runner and a valve gate system. The hot runner heats the resin and dispenses it into the cavity as the gate opens and closes. The valve gate system helps prevent melt from escaping through  t hot runner mould Manufacturers he narrowing gap, preventing splay in molded parts.

The sequential valve gate method is a proven method of filling molds and has a host of benefits. It's a proven technique for improving dimensional stability and preventing gas bubbles, while allowing for higher flexibility. It also results in a shorter cycle time and lower costs, which increases production. But what makes it such a great choice for pet products? Here are three advantages of this method:
Crystalline PET mold

The process to make a crystalline PET mold involves preparing the plastic powder in advance. This powder, called T1, was pre-dried in an oven at 130 degrees C for three hours before it was put in the laboratory machine. This pre-drying step ensures that the powder is free of air bubbles and contaminates. During the molding process, the mold must be kept at the right temperature to maintain its structure and resolution.

When creating a crystalline PET mold, it is important to manage the temperature gradient inside the mold. The gradient should range from 270 to 280 degC to between 5 and 15 degrees C. While the molding material should be properly dried before using it, there may be a need to modify the temperature management to avoid deformation. This can be a challenge when the mold is made of an incompatible material. Once the plastic has begun solidifying, the temperature must be carefully monitored.
Injection pressure of PET

When it comes to injection molding PET, the temperature gradient in the plastic mold is a critical consideration. The temperature gradient for PET plastic must be controlled between 270 and 280 degC, with no more than a five-to-ten-degree difference. Nevertheless, the temperature gradient in the PET mold needs to be controlled at all times, as the material is extremely fragile when it starts solidifying. In order to prevent the material from solidifying too early, it must be pre-dried thoroughly.

The injection pressure is also called the primary injection pressure and is used to inject up to 95 percent of molten plastic into a closed mould. While a high injection pressure helps the process proceed quickly, it also increases moulded-in stress. This is why a minimum injection pressure is required to fill the mold. The hold pressure, on the other hand, is used to finish filling the mould. If a mold's pressure can't meet the requirements of the process, a lower pressure is used.