plastic mold processing three factors that determine the quality
In recent years, with the rapid development of the plastics industry and the continuous improvement of the strength and precision of general and engineering plastics, the application range of plastic products is also expanding, such as: household appliances, instrumentation, construction equipment, automobile industry, day In many fields, such as hardware, the proportion of plastic products is increasing rapidly. A well-designed plastic part can often replace multiple traditional metal parts. The trend of plasticization of industrial products and daily-use products is on the rise.
so plastic mold processing three factors that determine the quality
1. Since the mold is developing in the direction of large-scale, molds of several tons to several tens of tons are very common, so the machine table needs to bear a large weight, which requires the equipment to have large load-bearing and high rigidity characteristics, and must have enough The large table size and working stroke are compatible with each other. The strength and hardness of the other mold materials are very high, and the mold cavity is often processed by a small-diameter end mill with a large elongation, so that the process is prone to chattering. In order to ensure the machining accuracy and surface quality of the parts, the high-speed milling machine for mold manufacturing must have high dynamic and static stiffness to improve the positioning accuracy, tracking accuracy and vibration resistance of the machine.
2. High-speed and high-power high-speed machining is the development direction, and high-speed milling has shown great advantages in mold processing. In order to adapt to the machining of the cavity surface of the mold, the radius of the tool should be smaller than the radius of the cavity surface* to avoid "interference" between the tool and the workpiece during the machining process. Due to the small diameter of the tool, the spindle speed is required to be very high. The speed has reached 40,000 to 100,000 r/min, and the rapid feed rate can reach 30,000 to 60,000 min. The cavities and other parts of the mold parts are often finished in the workpiece one-time clamping, so the spindle power is large, and the spindle power of the medium-sized mold milling machine and machining center is often 10-40kw, and some even higher.
3, multi-axis linkage and good deep cavity comprehensive cutting ability Mold cavity is composed of complex space six curved surface and groove, and many molds have deep cavity. In order to achieve high precision, high speed and high stability processing of 3d curved surfaces, the machine tool needs multi-axis linkage and has a good deep hole cavity comprehensive cutting capability. A five-axis linkage machining center can be used, in addition to the linear motion of three coordinates, there are two feed motions of the rotation coordinates. The milling head or table can be continuously rotated with multi-axis linkage, making it suitable for machining mold parts with complex cavity surfaces. It can be said that composite processing is one of the development directions of mold processing.
These are plastic mold processing three factors that determine the quality .