Repair the demoulding slope. In principle, the size of the cavity should be within the tolerance range of the workpiece size, and the size of the core should be within the tolerance range of the workpiece size; the fillet radius, cavity and core should be smaller and smaller; When there is a horizontal parting surface and a vertical parting surface, there should be a slight gap when the horizontal parting surface is in contact with the vertical parting surface during calibration. The small molds only need to be painted red and touch each other. The gap between the large molds is about 0.02mm; 4) For molds closed with an inclined surface, after the inclined surface is closed, there should be a gap of 0.02-0.03 mm on the parting surface; the repair surface is round The connection between the arc and the straight line should be smooth, the surface should not have dents, and the file pattern should be consistent with the opening direction.
Injection molding of plastic molds is a processing method for mass production of parts with complex shapes. Specifically, a material melted by heating is injected into a mold cavity by high pressure, and a molded product is obtained after cooling and solidification. Plastic molds are important process equipment for the production of various industrial products. With the rapid development of the plastic industry and the popularization and application of plastic products in aviation, aerospace, electronics, machinery, ships, automobiles and other fields, products have higher and higher requirements for molds, and traditional mold design methods can no longer meet today's requirements. Compared with traditional mold design, computer-aided engineering (CAE) technology can not only increase productivity and ensure product quality, but also reduce costs and labor. In the processing of injection molds, various CNC machining is used, and the most widely used are CNC milling and machining centers. The application of CNC wire cutting and CNC EDM in the CNC machining of molds is also very common. Wire cutting is mainly used for processing various straight-wall molds, such as concave and convex molds in stamping, inserts and sliders in injection molds, and electrodes for EDM. For high-hardness mold parts, machining cannot be performed, and EDM is often used. In addition, EDM is also used for sharp corners, deep cavities and narrow grooves of mold cavities.