发布时间:2018-11-21 10:01:57

Standard model of lathe and grinder thimble: the standard of fixed thimble is GB/ t9204.1-1988, and the standard of rotating thimble is JB/ t3580-1998. [1]

Design standard of thimble and matching plastic mould

1. The plunger is less than 3 ㎜ with two thimbles.

2. With the peak of the roof, for 8 ㎜ rod inserted into the top piece. The top block must have guide sleeve and guide sleeve should be fixed

3. If the small top piece cannot be fixed by screw, please design and position it with pin

4. The R Angle of the top sheet must be designed

5. Give priority to the ejector when the die can be removed with either the top or the thimble.

6. Through knife left 20-25 ㎜ thimble.

7. The plunger plate clearance through knife around 0.5 ㎜.

8. The thimble plate must have lower guide posts and garbage nails.

9. Top pin plate reset gives priority to the ejection accessories as far as possible (except the spring required by the customer)

10. Try to use a larger thimble (force and life).

11. Avoid using gas cap as much as possible under the premise that the product can be taken off automatically with inclined top.

12. Design concentric core and cavity valve (especially transparent product).

13. Carefully calculate the ejection distance in mold design to avoid insufficient ejection travel.

14. The product without original sample should carefully consider the ejection position and ejection method.

15. The mold of the oil cylinder shall put the oil cylinder on the thimble plate.

16. The valve mounting shall be removed from the bottom up.

17. Try not to screw the core in the push tube, and it must be fixed with the pressure plate.

18. The thimble on the inclined plane and the thimble step are designed to grow into a bar shape to avoid the inconvenience of D shape processing.