Standard for inspection of plastic mold hot runner system
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- Time of issue:2022-04-28
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(Summary description)The hot runner is to ensure that the plastic of the runner and gate is kept in a molten state by heating. The hot runner system is generally composed of hot nozzles, manifolds, temperature control boxes and accessories. The hot nozzles generally include two types: open type Hot nozzle and needle valve hot nozzle, because the hot nozzle form directly determines the selection of the hot runner system and the manufacture of the mold, so the hot runner system is often divided into an open hot runner system and a needle valve hot runner system accordingly.
Standard for inspection of plastic mold hot runner system
(Summary description)The hot runner is to ensure that the plastic of the runner and gate is kept in a molten state by heating. The hot runner system is generally composed of hot nozzles, manifolds, temperature control boxes and accessories. The hot nozzles generally include two types: open type Hot nozzle and needle valve hot nozzle, because the hot nozzle form directly determines the selection of the hot runner system and the manufacture of the mold, so the hot runner system is often divided into an open hot runner system and a needle valve hot runner system accordingly.
- Categories:News
- Author:
- Origin:
- Time of issue:2022-04-28
- Views:0
The hot runner is to ensure that the plastic of the runner and gate is kept in a molten state by heating. The hot runner system is generally composed of hot nozzles, manifolds, temperature control boxes and accessories. The hot nozzles generally include two types: open type Hot nozzle and needle valve hot nozzle, because the hot nozzle form directly determines the selection of the hot runner system and the manufacture of the mold, so the hot runner system is often divided into an open hot runner system and a needle valve hot runner system accordingly.
After the plastic mold hot runner system is designed and processed, how to test it? We can test its performance and qualification from the following points:
1. The wiring layout of the hot runner should be reasonable for easy maintenance, and the wiring numbers should be in one-to-one correspondence.
2. The hot runner should be tested for safety, and the insulation resistance to ground should be greater than 2MW.
3. The temperature control cabinet, hot nozzle and hot runner should be standard parts.
4. The main sprue is connected to the hot runner with a thread, and the bottom surface is contacted and sealed.
5. The hot runner is in good contact with the heating plate or heating rod, the heating plate is fixed with screws or studs, and the surface is well fitted.
6. The J-type thermocouple should be used and match with the temperature control meter.
7. Each group of heating elements should be controlled by a thermocouple, and the position of the thermocouple should be reasonably arranged.
8. The nozzle should meet the design requirements.
9. The hot runner should be positioned reliably, at least two positioning pins, or fixed with screws.
10. There should be a thermal pad between the hot runner and the template.
11. The error between the set temperature of the temperature control meter and the actual displayed temperature should be less than ±5°C, and the temperature control should be sensitive.
12. The cavity and the nozzle mounting hole should pass through.
13. Hot runner wiring should be bundled and covered with a pressure plate.
14. There are two sockets of the same size, which should be clearly marked.
15. The control wire should be sheathed and not damaged.
16. The temperature control cabinet has a reliable structure, and the screws are not loose.
17. The socket is installed on the bakelite and cannot exceed the maximum size of the formwork.
18. The wires are not allowed to be exposed outside the mold.
19. All areas where the hot runner or stencil contacts the wires should have rounded transitions.
20. Before the template is assembled, there should be no open circuit or short circuit in all lines.
21. All wiring should be properly connected and have good insulation.
22. After the template is mounted and clamped, all circuits should be rechecked with a multimeter.
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