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Plastic Mold Processing Depends On These Three Factors
May 21, 2018

 1. Since the mold is being developed towards large scale, molds of several tons to several tens of tons are very common. Therefore, the machine table is required to be able to withstand large weights. This requires that the equipment must have large load-bearing capacity and high rigidity, and it must have enough. The large size of the table top and the working stroke are compatible with the high strength and hardness of the mold material. In addition, the mold cavity is often processed with a small-diameter end mill with a large elongation, so the process is prone to chatter. In order to ensure the machining precision and surface quality of the parts, the high-speed universal milling machine for mold manufacturing must have high dynamic and static stiffness to improve the positioning precision, tracking accuracy and vibration resistance of the machine tool.

 

    2. High-speed and high-power high-speed machining is the development direction, and high-speed milling has shown great superiority in mold processing. In order to adapt to the processing of mold cavity surface, the radius of the tool should be smaller than the minimum circle radius of the cavity surface to avoid "interference" between the tool and the workpiece in the machining process. Because the tool diameter is small, the spindle speed is required to be very high, and the spindle speed of foreign high-speed machining tools is required. Has reached 40,000 ~ 100,000 r / min, rapid feed rate of up to 30,000 ~ 60,000 min. Cavity and other parts of the mold parts are often finished in one clamping of the workpiece. Therefore, the spindle power is large. The spindle power of medium-size mold milling machines and machining centers is usually 10-40kw, and some are even higher.

 

    3, can be multi-axis linkage and a good deep cavity cavity comprehensive cutting ability The mold cavity is mostly composed of complex space six curved surfaces and grooves, and many molds have a deep hole cavity. In order to achieve high-precision, high-speed and high-stability machining of 3D surfaces, the machine tool needs multi-axis linkage and has a good deep-cavity cavity comprehensive cutting capability. A five-axis machining center can be used. In addition to the linear motion of three coordinates, there are two feed motions of the rotating coordinates. The milling head or table can be continuously rotated in multi-axis linkage, making it suitable for machining mould parts with complex cavity surfaces. It can be said that composite machining is one of the development directions of mold processing.