The basic points of designing gas-assisted injection molding

1. Firstly, considering the suitable wall thickness areas needs to be injected and hollowed out, and then decide how to connect them with the gas channel;
2. The gas channel should be arranged in balanced and cannot return back;
3. The layout of the gas channel should be consistent with the main material flow direction, and a larger fillet radius should be used at the corners;
4. The gas nozzle should be placed at the farthest place from the last filling place of the plastic, and placed at the wall thickness area, keeping a distance of more than 20mm from the gate;
5. When the gas is injected, it must be a clear flow direction and it can go to the end of the gas channel;

6. The size of the gas channel is very important, generally 2~4 times than the wall thickness, if the gas channel is too big will cause welding line and air trapping, and if gas channel is too small will cause the gas flow out of control;
7. The cooling should be as even as possible, and the temperature difference between the inner and outer part should be as small as possible, then make a block in half diameter gate area to control the gas flow speed in different directions.

Plastic injection mold cooling system design notice
Feb 14, 2022Design notice of designing the cooling system: 1. Normal molds can be quickly cooled to obtain a shorter molding cycle, and precision molds can be slowly cooled with a mold temperature thermometer; 2....view
Plastic injection mold common cooling gate
Feb 17, 20221. Straight-through cooling water gate: the straight-through cooling gate is the most commonly used gate for plastic injection mold, and it is also the most convenient type of cooling for processing....view
Direct gate of plastic injection mold runner system design
Jan 19, 2022In order to get the best injection quality, the gate type must be selected carefully, the coommon gate tyeps are: direct gate, side gate, pin-point gate, sub gate,valve gate of hot runner etc. Among...view
Key points of gas-assisted injection molding process
Apr 20, 2022Gas injection parameters The gas-assisted control part is a device that controls the gas pressure in each stage, the gas-assisted parameters have only two values: gas injection time (seconds) and gas...view
What is Plastic Injection Mold?
Dec 27, 2021The plastic mold is used for injection molding, it is assembled with cavity, core and side slider together, with ejection system and adjustments to produce plastic products by different shapes and...view
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...view
English
русский

_20250310164515A048.webp)

