0769-8539-0209 / +86-15158220988
UNIQUE SOLUTIONS MOLD LIMITED
UNIQUE SOLUTIONS MOLD LIMITED
Parting surface venting of runner system

Parting surface venting of runner system

There 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 surface, rest of gas will enter the cavity with plastic melt together, but it is better to have less gas inside cavity to reduce the venting cavity.


The gas in therunner system should be mainly discharged through the parting surface, the exhaust slot of the gating system is mainly opened at the end of the runner, as shown in picture 1.


The exhaust slot design of the runner:

The depth of the exhaust slot (h) is as deep as the flash edge at the end of the runner;

1. Plastic with good fluidity, h≈0.075mm;

2. Plastic with poor fluidity, h≈0.125m;

The width of the exhaust slot is the same as that of the runner, and the entrance should be polished;

The injection pressure at the runner is high, and the exhaust slot should not be facing the operator.


图片1.png


Tags: Injection Molding | Mold Supplier | Mold Factory | Injection Molding Factory | Injection Molding Supplier | Injection Mold Factory | Injection Mold Supplier | Injection Mold |
Related News about USM Injection Mold
  • Water assisted injection molding introduction

    Water assisted injection molding introduction

    May 12, 2022Like the gas-assisted injection molding process, water-assisted injection molding injects a piece of plastic into the mold cavity and core firstly, and then injects water to squeeze the melt plastic b...view
  • Plastic injection mold runner system design points

    Plastic injection mold runner system design points

    January 10, 2022When designing the gating system, Firstly, we should consider making the plastic melt fill the cavity with core side quickly to reduce pressure and heat loss; secondly, it should be economically cons...view
  • Gas-assisted Injection Molding Equipment

    Gas-assisted Injection Molding Equipment

    April 11, 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 ...view
  • Banana gate of plastic injection mold runner system design

    Banana gate of plastic injection mold runner system design

    February 8, 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
  • Controling method of plastic injection mold temperature

    Controling method of plastic injection mold temperature

    February 16, 2022Except for heat radiation and heat convection from the mold, most of the heat bring into the mold by the plastic needs to be taken out of the mold by the circulating heat transfer medium by heat condu...view
  • Slider of side core pulling mechanisum assembling

    Slider of side core pulling mechanisum assembling

    July 22, 2022The picture 1 shows a typical guide pin driven slider parting and core-pulling mechanism, we will talk about the composition and function of the lateral core-pulling mechanism.1. Lateral forming parts...view