The characteristics of injection mold is determined by the characteristics of raw materials, mainly has two points: one is plastic melt injection molding flow characteristics, the second is inside the cavity when plastic cooling solidification contraction line, both of which determine the particularity of injection mold and injection mold design difficulty.Because plastic melt are sticky projectile, the melt flow when the viscosity with the shear stress, shear rate, the flow in the process of production along the flow direction orientation, the cavity is filled, the melt was part of the compression, cooling and solidification process of the plastic shrinkage is very complex, each part of the mold cavity, the direction of plastic shrinkage rate is different, different species, there were significant differences in brand of plastic shrinkage rate, the same brand of resin or plastic in the processing, on the basis of different formula, the molding of liquidity and shrinkage rate is different.Based on the characteristics of injection mold design to fully understand the characteristics of the processing of plastic raw materials, make a design of injection mold reasonable use, and effective use in the process of design characteristics of the plastic.Therefore, in the process of injection mold design issue to consider is as follows:
1, The thorough analysis of plastic parts structure and technology requirements.
2, Be familiar with the technical specifications of injection molding machine.
3, Understand plastic processing performance and process performance.
4, Consider injection mold design and manufacturing, mainly to solve the following problems.
4.1, The choice of the injection mold structure should be reasonable.
4.2, The size of injection mold shaping parts should be calculated correctly.
4.3, Easy to design of injection mould should be made.
4.4, The injection mold of the design should be of high efficiency, safe and reliable.
4.5, The injection mold parts should be wear-resisting durable.
4.6, The injection mold structure to adapt to the plastic molding characteristics.
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