The basic points of designing gas-assisted injection molding


图片2.png


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;


图片3.png


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.


Tags: Injection Mold | Injection Mold Supplier | Injection Mold Factory | Mold Factory | Mold Supplier | Injection Molding |
Related News about USM Injection Mold
  • Main application of gas-assisted molding technology

    Main 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...view
  • Plastic injection mold heating

    Plastic injection mold heating

    Feb 16, 2022When the plastic injection molding process requires the mold temperature to be above 80°C, a temperature adjustment system with heating function must be provided in the mold. In addition,...view
  • Plastic molding shrinkage rate

    Plastic molding shrinkage rate

    Dec 30, 2021Plastic parts getting smaller by shrink, due to the temperature decrease during the molding process, and the shrinkage is expressed by the shrinkage rate, it is common plastic shrinkage rates are...view
  • Slider spring hength and strength calculation

    Slider spring hength and strength calculation

    Apr 22, 2024Processing size: 1. ØD2=ØD+2 2. Ll = total spring length (L) - preload value of spring (N) - slider core pulling distance (L2) Spring length calculation: (refer to picture 1 for length calculation)...view
  • Well-ventilated steel of venting design for molded parts

    Well-ventilated steel of venting design for molded parts

    Mar 14, 2022Well-ventilated steel is a sintered alloy, iIt is a porous material sintered with spherical particle alloys, the pore size is 7-10μm and the strength is poor, but the texture is loose which allow the...view
  • Parting surface venting of runner system

    Parting surface venting of runner system

    Mar 10, 2022There are a large amount of gas in the main and sub channel, these gas are discharged through the pull rod (push rod) during injection processing, a part of gas come out from exhaust slot on parting...view