Today we are going to talk about how to detect the qualification of the molding part, parting surface and exhaust groove of the plastic mold. The molding and parting type can be said to be the most important parts of the plastic mold. After the mold is completed, the inspection of these parts It is also very strict, and our detection can be carried out from these points.

1. The surface of the front and rear molds should not have unevenness, pits, rust and other defects that affect the appearance.

2. The insert should be matched with the mold frame, and there should be a gap of less than 1 mm around the rounded corners.

3. The parting surface is kept clean and tidy, no hand-held grinding wheel is used to avoid air, and there is no depression in the sealing part.

4. The depth of the exhaust groove should be less than the overflow value of the plastic.

5. The research and matching of the inserts should be in place, the placement is smooth, and the positioning is reliable.

6. The inserts, insert cores, etc. should be positioned and fixed reliably.

7. The end face of the ejector pin is consistent with the core.

8. There are no defects such as undercuts and chamfers in the front and rear mold forming parts.

9. The rib ejection should be smooth

10. The product of the multi-cavity mold, the left and right parts are symmetrical, and should be marked with L or R. If the customer has requirements for the position and size, it should meet the customer's requirements. Generally, it should be added where it does not affect the appearance and assembly, and the font size is 1/8. .

11. The locking surface of the mold base should be in place, and more than 75% of the area should be touched.

12. The ejector rod should be arranged near the side wall and beside the ribs and bosses, and a larger ejector rod should be used.

13. For the same parts, number 1, 2, 3, etc. should be marked.

14. The touch-through surface, the penetration surface and the parting surface should be researched and matched in place.

15. The part of the parting surface sealant should meet the design standards. Molds below medium size are 10~20mm, large molds are 30~50mm, and the rest are machined to avoid voids.

16. Skin texture and sandblasting should be uniform to meet customer requirements.

17. For products with required appearance, the screws on the products should have anti-shrinkage measures.

18. For screw columns with a depth of more than 20 mm, jacking pipes should be used.

19. The wall thickness of the product should be uniform, and the deviation should be controlled below ±0.15 mm.

20. The width of the ribs should be less than 60% of the wall thickness of the appearance surface

21. The inserts on the inclined top and the slider should have a reliable fixing method.

22. The front mold is inserted into the rear mold or the rear mold is inserted into the front mold, and there should be inclined surfaces around it to lock and machine to avoid voids.