June 16, 2020

The harm of small injection molding machine with large mold for injection production

Small injection molding machines are used for injection production with large molds. Even if the molds can be installed, the ejection force of the injection molding machine is insufficient, and the injection parts are difficult to eject. Therefore, the operator often has to adjust the ejection speed of the ejector rod. To form an impact force to eject the product.

However, the consequences of using the above methods are serious. First, the jack is easily broken by repeated impacts; second, it causes many defects in the product. For example, due to the limited power of the machine, the injection pressure, clamping pressure and injection speed are insufficient. Products are more prone to shrinkage, overflow, insufficient filling, color mixing, insufficient plasticization and other problems, and it is more difficult to fill when molding PC materials, and it is more difficult to eliminate shock marks and air lines; third, in order to solve thick plastic parts during injection molding When the injection speed needs to be very slow, the screw is very difficult to push, and it must be adjusted to a larger injection molding machine to make it possible. In addition, small injection molding machines are often used to inject large molds, and the life of the injection molding machine will be greatly shortened.

Therefore, as a last resort, try not to use a small injection molding machine to produce large molds.

Generally, when the melt amount during molding is too large, such as more than 2/3 of the maximum melt volume of the injection molding machine, and the mold is too large to be placed in the injection molding machine, the above problems are more likely to occur.

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Injection Molding, Plastic Mold Case, Plastic Molding Design, Plastic Parts
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