Plastic injection mold runner system design

The gate is the connecting part between the runner and the cavity, and is also the end part of the injection mold gating system, the molten plastic enters the cavity and core side through the gate directly. The function of the gate is make the molten plastic coming from the runner enter and fill the cavity with core by fast speed, after the cavity with core are filled with plastic, the gate can be cooled quickly and sealed to prevent the hot material in the cavity from flowing material.

The gate design is related to factors such as the part shape, the cross-sectional size of the part, the plastic performance, the mold structure and the injection process parameters. The gate cross-sectio should be small and the length should be short, so as to increase the material flow speed, fast cooling and sealing to separate the plastic parts, and the gate marks are not obvious.

The gate is a key part of the gating system, the gate location, type and size have a big influence on the plastic parts quality, the quality defects of plastic parts, such as air trapping, shrinkage, water trapping, decomposition, washout, deformation, etc., are often caused by unreasonable gate design. The gate is the smallest part of the entire gating system (except for the direct gate of the sprue type) in many cases.


The design content of the gate includes the following 3 points:

①Select the gate location

②Determine the gate type

③Determine the gate size


We will talk about how to determine the location of the gate in following article.


图片1.png

Tags: Injection Mold | Injection Mold Supplier | Injection Mold Factory | Mold Factory | Mold Supplier | Injection Molding |
Related News about USM Injection Mold
  • USM Blogo Opening

    USM Blogo Opening

    Oct 27, 2021Hello everyone! Our blog is open today, it is very glad to have the opportunity to meet you here, welcome to visit us whenever you need. USM is a professional plastic injection mold and molding...view
  • Several common process of water-assisted injection molding introduction

    Several common process of water-assisted injection molding introduction

    May 24, 2022According to the design of the injection molding machine and the casting system, the corresponding melt-returning process of water-assisted injection molding can be roughly divided into two types: the...view
  • Vacuum venting mold design for plastic molded parts

    Vacuum venting mold design for plastic molded parts

    Mar 23, 2022There are some regular venting way which are parting surface venting, insert venting, insert pin venting and well-ventilated steel, but there is a special way is vacumm venting, it will need vacumm...view
  • Classification of side parting and core pulling mechanism

    Classification of side parting and core pulling mechanism

    Jul 17, 2022According to the structural characteristics of plastic moulding, the side core-pulling mechanisms are divided into the following six categories: 1. The side core-pulling mechanism of "slider + guide...view
  • Plastic injection mold runner system design

    Plastic injection mold runner system design

    Jan 16, 2022The gate is the connecting part between the runner and the cavity, and is also the end part of the injection mold gating system, the molten plastic enters the cavity and core side through the gate...view
  • The design principle of the exhaust slot

    The 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