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preformbottle
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Oprettet 5. December 2019 kl. 06:19
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The reason is that when the melt viscosity is too large and the mold

Constant alternating causes the stream to form a surface grain in the forward direction. Reduce the filling speed, reduce the forming cycle and reduce the flow resistance. (4) The mold exhaust should be good, and a large enough cold well should be set. This is because the plastic that is not completely cooled and hardened is caused by the expansion of the gas under the action of the internal pressure. Analysis of the causes of swelling and bubbling of injection molded parts Some plastic parts are swollen or bubbling on the back side of the metal insert or in a particularly thick part after the mold is released. 3. Reduce the mold temperature, extend the mold opening time, and reduce the drying and processing temperature of the material. Effective cooling. Increase pressure and time. (5) Do not design the parts too thin. Solution: (1) Increase the temperature of the barrel, especially the nozzle temperature, and increase the mold temperature. (3) Improve the size of the runners and gates to prevent excessive resistance. 2. 4. Improve the condition that the wall of the workpiece is too thick or the thickness changes greatly.. (2) Increase the injection pressure and speed to make it quickly fill the model cavity. Analysis of the Causes of the Injection Mold Manufacturers of Injection Molding Products Rigid plastic parts such as PS form a dense corrugation on the surface near the gate, centered on the gate, sometimes called a shock pattern. The reason is that when the melt viscosity is too large and the mold is filled in a stagnant form, the front end material quickly condenses and shrinks as soon as it contacts the surface of the cavity, and the subsequent melt expands the contracted cold material to continue the process. Solution: 1 https://www.tzhengmei.com/


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