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What should be paid attention to when processing plastic molds

Update:11-06-2020
Summary:

Since the mold is developing in the direction of large- […]

Since the mold is developing in the direction of large-scale, molds of several tons to tens of tons are very common, so the worktable of the machine tool is required to bear a large weight, which requires the equipment to have the characteristics of large load-bearing and high rigidity.

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

Transmission oil guide

2.Since the mold is developing in the direction of large-scale, molds of several tons to tens of tons are very common, so the worktable of the machine tool is required to withstand large weight, which requires the equipment to have the characteristics of large load-bearing and high rigidity, and must also have enough The large table size and working stroke are suitable for it. The strength and hardness of the mold material are very high. In addition, the small diameter end mill with a large elongation is often used to process the mold cavity, so the chattering process is prone to chatter. In order to ensure the machining accuracy 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 accuracy, tracking accuracy and anti-vibration ability of the machine tool.

3. High-speed and high-power high-speed machining is the development direction. High-speed milling has shown great advantages in mold processing. In order to adapt to the processing of the mold cavity surface, the radius of the tool should be smaller than the minimum circumferential radius of the cavity surface, so as to avoid "interference" between the tool and the workpiece during the processing process. Due to the small diameter of the tool, the spindle speed is required to be very high. Has reached 40,000 ~ 100,000 r/min, rapid feed rate can reach 30,000 ~ 60,000 min. The rough and finish machining of the cavity and other parts of the mold parts are often completed in one clamping of the workpiece, so the power of the spindle is large. The power of the spindle of the medium-size mold milling machine and the machining center is often 10-40kw, and some are even higher.

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