What are the key points of mold design?
There are many types of molds, which can be divided according to the processing objects and processing techniques: ① Molds for processing metal. ②Processing non-metal and powder metallurgy molds. According to the different materials being formed, molds can be divided into hardware molds, plastic molds, and special molds. According to structural characteristics, molds can be divided into flat punching molds and cavity molds with space. So what are the key points of mold design? Let me tell you about this.
1. Generally, it is not advisable to put glue in the middle of finished flat products to prevent bending and deformation.
2. Generally, STP is directly below RP.
3. When the mold base is larger, the STP interval is 150--200mm.
4. The distance between the screws to lock the upper and lower ejection plates is 150--200mm.
5. When there is an ejector pin under the slider or the inclined tip is broken, the upper and lower ejection plates must be equipped with a forced return mechanism.
6. The draft angle of the finished product is based on glue reduction.
7. When designing the waterway, try not to use water pipes to directly connect to the mold core. Instead, use the mold water inlet pipe to connect the mold core with "O" RING.
8.SP try to make its diameter as large as possible and arrange it under the orthographic projection area of ??the finished product.
9. Three principles for cooling water channels: A. Rapid cooling, B. Uniform mold temperature, C. Convenient processing.
10. The distance between the slant tip and the center of the mold should be rounded up.
11. The KO hole is eccentric with the eccentricity of the injection port bushing, and the maximum inclination angle of the injection port bushing shall not be greater than 15°.
12. For two-piece half molds, the parting stroke between the upper fixed plate and the female template must be controlled by a mechanism. LP must have a guide bushing on the male template, and generally also needs a guide bushing. LK switch.
13. Generally, the method of dealing with the inner barbs can be the inclined tip, the inner slider, and the peeling plate (eject the middle plate). The ejection tip should be avoided under the slider to avoid collision or interference.
14. Generally, the mold core exceeds the outline of the finished product by 20-30mm, and the distance from the center of the mold should be rounded up. The distance between the template and the mold core frame is 20-30mm. If there is a slider, the template should be enlarged, especially Be careful to avoid interference with the return pin.
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