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Advantages and Disadvantages of Hot Runner

Posted by: Mu Ju 2021-11-24 Comments Off on Advantages and Disadvantages of Hot Runner

Why use hot runner?

  1. The quality of Multi-cavity plastic mold is not the same.


  1. Thin Wall of plastic products have large deformation.


  1. Use rate of runneris low.


  1. It is very difficult tofill the plastic mold.

The advent of hot runner technology has provided a more comprehensive solution to these problems. Generally speaking, hot runner has the following advantages:

  1. In the runner, the pressure loss is small, the plastic fluidity is good, the temperature is uniform, the internal stress of the product will be reduced, the surface quality and mechanical properties of the product will be greatly improved.


  1. 2. Shorten the molding cycle, open the mold stroke and improve the production efficiency.


  1. The hot runner automatically cuts off the gate to improve automation.


  1. Reduce injection pressure, protect mold and prolong service life.


  1. Multi-cavity plastic mold ensures uniform packing and consistent quality.


  1. Eliminate all or most of the waste from the runner, and the effective utilization rate is high.


Defect of hot runner

The cost of plastic mold is too high, which is not suitable for small plastic mold, and also has high requirements for plastic mold design. Sometimes it’s not economical and pratical.

PTJMould Industrial Company Limited, established in 2010, is a leading injection moulding manufacturer in China. PTJMould specializes in plastic mould production for household appliances, medical equipments, electronic equipments, safety equipments as well as monitoring system.

The company has over 15000 square metres factory. With plastic injection tooling divisions possessing different machinery and expertise, PTJMould offers tools from small and precise mobile phone parts to as big as automotive parts. Our tools are mainly exported to U.S.A., Europe, Japan and UK. PTJMould’s diversification strategy and full service has won compliment from customers all over the world.

Our mission is to provide our customers high quality moulding products and services. We aim to exceed our customers’ expectations of pricing, quality and on-time delivery. To achieve our mission, PTJMould:

  • Commits to continually improve employee skills and efficiency,
  • Provides our employees a clean and safe working environment,
  • Upgrades machine technology and support equipment through a strict maintenance program, and
  • Maintains customers’ tooling to its highest peak of performance



For more about custom manufacturer of plastic molding products,please visit https://www.plastics-moulding.com/


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