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Category Archive for: 'injection molding'

The problem of sink marks of plastic injection parts (surface shrinkage and internal shrinkage) is due to the insufficient melt replenishment when the thick part is cooled. We often encounter these sink mark problems, no matter how to increase the pressure, increase the water lines numbers,and extend the time of the injection, the shrinkage problem …

The plastic mold can be viewed as an exchanger that carries the heat of the hot melt away from the plastic mold by the circulating refrigerant. The role of the cooling system  1. Improve productivity 2. Ensure the effective of a mold In the whole cycle of thermoplastic injection molding, the mold cooling time accounts …

If the plastic parts are unevenly shrinked, the internal stress distribution will be uneven. If the stress exceeds the rigidity of the plastic part, the warpage and deformation of the plastic part will be found, which will affect the dimensional stability of the plastic part. But what is warpage? When internal stress (due to uneven …

The temperature of the injection mold has a great influence on the filling, solidification , production efficiency, and the shape and dimensional accuracy of the plastic parts. Each kind of plastic material has a reasonable mold temperature arrange, which makes the melt flow easily fill the cavity. If the mold temperature is reasonable, the shrinkage …

PET chemical name is polyethylene terephthalate, also known as polyester. At present, GF-PET is the most used among customers, mainly for preform injection. The rheology of PET in molten state is better, and the effect of pressure on viscosity is greater than temperature. Therefore, the fluidity of the melt is mainly affected by pressure. Plastic …

In a sense, the injection mold is also a displacement device where the hot plastic melt enters into the mold cavity while displaces the air in the mold cavity. In fact, the air in the mold is not limited to the cavity, especially the three-plate injection mold, and the air existing in the flow path …

Transparent parts have their special characteristics and functionality. The poly-carbonate injection molding will inevitably be used for auto part. When injection molding, we often encounter some thick-walled transparent  injection molded parts. For performance reasons, these plastic parts are made of PC. When the average wall thickness exceeds 6mm and the MAX wall thickness is more …

Polycarbonate injection molding Topworks is a professional manufacturer of poly-carbonates injection molding. We have more than 10 years of production experience in poly-carbonates injection molding We have rich experience in the production of extra wall thickness poly-carbonates and ABS/PC injection molding part. Our PC injection molding covers the following industries: Automobile parts Medical instruments Aerospace …

How to Present Your Product Idea to a Design Firm   You have a product idea you want to take to market. Now what? Aspiring entrepreneur, tinker, engineer…Your mind runs 1,000 miles per hour thinking of the many different ways you can improve your environment. Just recently you have come up with a product idea that you …

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