What should be paid attention to when processing plastic molds

Update:28-12-2019
Summary:

As the mold is developing in a large-scale direction, m […]

As the mold is developing in a large-scale direction, molds of several tons to tens of tons are very common. Therefore, it is required that the machine tool table can bear a large weight. This requires that the equipment must have the characteristics of large load-bearing and high rigidity, and it must be large enough. The table size and working stroke are compatible with it. The strength and hardness of the mold material are very high. In addition, small diameter end mills with large elongation are often used to process the mold cavity, so the process is prone to chatter.

Because the mold is developing in a large-scale direction, molds of several tons to tens of tons are very common. Therefore, it is required that the machine tool table can bear a large weight. This requires that the equipment must have the characteristics of large load-bearing and high rigidity. The large table size and working stroke are compatible with it, and the strength and hardness of the mold material are very high. In addition, small diameter end mills with large elongations are often used to process the mold cavity, so the process is prone to chatter. In order to ensure the machining accuracy and surface quality of the parts, the high-speed universal milling machine manufactured by the mold must have high dynamic and static stiffness to improve the positioning accuracy, tracking accuracy and vibration resistance of the machine tool.
 
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 to avoid "interference" between the tool and the workpiece during processing. Due to the small diameter of the tool, the spindle speed is required to be very high. It has reached 40,000 to 100,000 r / min, and the rapid feed rate can reach 30,000 to 60,000 min. The rough and fine machining of the cavity and other parts of the mold parts are often completed in a single clamping of the workpiece, so the spindle power is large. The spindle power of medium-sized mold milling machines and machining centers is often 10-40kw, and some are even higher.

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