Injection mold manufacturer What are the requirements for electric mold processing

Injection mold factory What are the requirements of home appliance mold processing? Because the processing time is too long, the influence of ambient temperature must also be considered. For example, when machining a large mold on an ordinary machine tool, a change of 10 ° C in the ambient temperature will cause a change of 6 ° C in the column temperature of the machine tool, thus changing the parallelism of the spindle angle plate by 0.07 mm. Therefore, the influence of ambient temperature must be considered in the design of machine tools to avoid the influence of ambient temperature on the accuracy of machined parts.

The mold drawing should include two plans and a vertical cross section, especially cut as many shapes as possible from the products with large differences in the horizontal height of the pillow, and draw the pillow line of the product in the plan. The precision of the mold, that is, to avoid jamming, guide posts, pins, etc., depends on the appearance quality of the product, the quality and life of the mold. According to the die structure, various methods are selected. These methods mainly depend on the control of machining accuracy. The internal model is mainly used for design. This method has been fully considered by the teacher, and the design is reasonable and easy to adjust.

(2) Warm up. According to the materials and requirements of die parts, preheating processes such as annealing, normalizing or quenching and tempering are used to improve the structure, eliminate the structural defects of forging blanks, and improve the processing technology. High carbon alloy cast steel can be preheated properly to remove network secondary cementite or chain carbide, spherical and refined carbide, and even to make carbide distributed evenly. This will help ensure the quality of quenching and tempering and improve the life of the die.

The important parameter that determines the product size at a constant forming temperature is the holding pressure, and the important variables that affect the product size tolerance are the holding pressure and temperature. For example, after the filling is completed, the holding pressure decreases immediately. When the surface layer forms a certain thickness, the holding pressure increases again. In this way, large products with a low clamping force can form a large wall, and the flash can be deleted.

Injection pressure control is generally divided into one injection pressure, two injection pressures (holding pressure) or three or more injection pressure control. Correct pressure conversion time is very important to prevent excessive pressure on the die and to prevent overflow or insufficient material. The specific volume of the molded part depends on the melt pressure and temperature when the gate is closed in the holding step. When switching from holding pressure to product cooling stage, if the pressure and temperature are the same, the same pressure will not change.

Because the treatment time is too long, the influence of ambient temperature must also be considered. For example, when machining a large mold on an ordinary machine tool, a change of 10 ° C in the ambient temperature will cause a change of 6 ° C in the column temperature of the machine tool, thus changing the parallelism of the spindle angle plate by 0.07 mm. Therefore, the influence of ambient temperature must be considered in the design of machine tools to avoid the influence of ambient temperature on the accuracy of machined parts.