The Role Of Pressure Maintaining

DKM

The role of DKM injection molding machine pressure maintaining: after the mold cavity is filled with plastic until the gate is completely cooled and closed for a period of time, the plastic in the mold cavity still needs a quite high pressure support, to supplement the shrinkage of the material due to cooling. Different shrinkage of materials, will produce different problems, such as product depression, deformation warping, abnormal size, batch front, so master the use of pressure, can solve most of the bad injection molding.

Products in cooling in the mould is different: near the gate of the slow cooling, far gate cooling fast, the temperature distribution of the products is nearly gate to the remote, the temperature is gradually reduced, which is the distant part of the curing finalize the design, gate stage of material is still in the flow, so between them at the same time is gradually changing.

Material is in high temperature and high pressure under the condition of high speed from liquid into solid, material is composed of molecules, molecular in the injection stage is tensile state, when the pressure drop, the molecules will shrink, because the temperature distribution of different products, the molecular contraction in every area of the product is different, this will produce different molecules stretch contraction force, namely, internal stress.

Pressure protection for the DKM injection molding machine: when setting pressure protection, if the pressure in the last section is very high, at the end of pressure preservation, the pressure is suddenly removed without buffer transition, which has a great impact on the injection motor. When multi-stage pressure holding is set, the pressure holding pressure of the last stage is small, and the machine can release the pressure to buffer the transition and protect the motor.

The ultimate goal of constant pressure adjustment is to produce a stable product. Master some small skills, or will play the role of switching machine.

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