Injection mold classification: two-plate mold, three-plate mold, hot runner.
Features and application occasions:
Two-plate mold: the most commonly used, three-plate mold: needle point into the finished product or eccentric into the rubber pad, hot runner: no runner, can reduce waste and increase injection pressure.
Mold processing methods mainly include forging, milling, drilling, grinding, EDM, wire cutting, etc.
EDM:
EDM is a special processing method that uses electrical erosion generated by impulse discharge between two electrodes immersed in the working fluid to etch conductive materials. It is also known as electrical discharge machining or electrical erosion machining. As shown below:
Cutting processing:
The basic principle of wire cutting is to use a moving thin metal wire (copper wire or molybdenum wire) as an electrode to perform pulse spark discharge on the workpiece and feed the control system through the computer. With a certain concentration of water-based emulsion for cooling and chip removal, the workpiece can be graphically processed.
1. CNC milling machines are generally used for rough machining of molds and surfaces with low appearance requirements, such as the back of the product-the male mold surface.
2. EDM is generally used to process curved surfaces and reinforcement ribs that are difficult to be processed by CNC milling machines.
3. Wire cutting is generally used to process oblique pins forming hooks, through holes with irregular shapes and narrow slits.
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