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| Key Word: Taili Plastic Machinery; Taili Plastic Machinery-Capacity Improving Expert; Efficient; Stable; Ice Cream Cup A few days ago, Mr. Wang from Guangzhou told Taili Plastic Machinery that he set the injection pressure according to the injection manual, but the feedback pressure was as high as 200 bar and a loud noise was made when the machine is working. He almost broke the machine. Mr. Wang's products are ice cream cups made of high strength HDPE, whose fluidity is very poor. The wall thickness of ice cream cup is usually about 0.5, so it is not advisable to choose the size of injection molding machine and set parameters according to general injection experience. For this kind of product, the theoretical injection time should be controlled within 1s according to the production experience of thin-walled products, the wall thickness of the product and the maximum injection speed of the injection molding machine, and the mold size calculated according to the projection area should be less than the maximum volumetric modulus of the injection molding machine.
Generally, according to the empirical formula, the feedback injection pressure of injection molding can not exceed 80% of the designed injection pressure. If it exceeds, there will be no surge of injection pressure like Mr. Wang's. This surge is often not linear, which is caused by the unsmooth injection and large mold internal pressure. In fact, for Mr. Wang's product, we can choose the "TLE fast machine" series of injection molding machine, which not only ensures the injection speed, but also improves the design injection pressure, so that the feedback injection pressure will be as low as 100bar, which can play a great role in the maintenance and service life extension of the injection molding machine. Taili Plastic Machinery always keeps in mind that what a good injection molding machine factory should do is to help improving the capacity and boosting the profits, rather than offer the similar products the customers need. This is also what Taili Plastic Machinery keeps doing. Follow Taili Plastic Machinery and we will share more with you. |
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