The design principle of the exhaust slot
The exhaust system of plastic molds is also very important, if the product has air trapping or exhaust system is not suitable will have a big impact on injection molding production and product quality, especially for predeformation mold, the part size will be different if there is air trapping inside mold, which will cause instability during production.
We must follow the following principles when making the mold exhaust slot:
1. The exhaust must be rapid and complete, and the exhaust speed should be compatible with the filling speed;
2. The exhaust slot (hole) should be made in thicker wall thickness of the plastic part;
3. The exhaust slot should be made in parting surface as much as possible, and it is better to make it on the side of the cavity side(according to the shape, characteristics and mold structure of the plastic part, the position of the exhaust slot is allowed to make in core side);
4. The burrs generated by the overflow of the exhaust slot should not hinder the demolding;
5. The exhaust slot should be made as far as possible at the end of the material flow, such as the end of the runner and slug well ;
6. The exhaust direction of the exhaust slot should be toward the reverse operation surface;
7. Refer to the standard data for the depth of the exhaust slot and the depth of the overflow slot, the width and distance, etc.;
8. The exhaust slot should be polished along the exhaust direction;
9. Exhaust slot must be made at the weld mark area;
10. It is better to make the exhaut slot as deep as possible which can not see the flash, but it will be better to see the flash in runner area.
What is Ejection Molding?
Dec 28, 2021The process to get injection molded products is called injection molding, or called injection. Injection molding is an important method in polymer molding processing, it is characterized by a short...viewVenting system of plastic injection mold introduction
Feb 27, 2022Hello everyone, thanks for attention. We’ve discussed about the temperature control system earlier, now we are going to talk about the mold venting information in following 11 articles, from the...viewThe principle of mold temperature balance in plastic mold cooling system design
Feb 21, 2022The principle of mold temperature balance: 1. Due to the complexity of the plastic parts and mold structure, it is difficult to make the temperature of the mold completely consistent, but should be...viewMain application of gas-assisted molding technology
Apr 7, 2022Gas-assisted molding has a particularly obvious effect on the material saving of tubular and rod-shaped plastic parts, such as car handles, seat armrests, window frames, and wood-like furniture, the...viewGas-assisted Injection Molding Equipment
Apr 10, 2022The gas-assisted equipment includes a gas-assisted control part and a nitrogen generator, it is special and seperate system of the injection molding machine, and its only interface with the injection...viewThe design principle of the exhaust slot
Mar 6, 2022The exhaust system of plastic molds is also very important, if the product has air trapping or exhaust system is not suitable will have a big impact on injection molding production and product...view