Hot runners and non runner What is the difference?

In the injection mold, hot runner systems have been inseparable since hot runner systems can improve product quality, shorten the molding cycle, the most important thing is to save raw materials to reduce costs, but also help greatly improve the life of mold. With the continuous improvement of injection molding technology and the pursuit and the need for high-precision plastic products, traditional cold runner mold has been unable to meet the demand can not meet the precision requirements of modern products. When cold runner will have a sprue slug mold opening, mold spacing is not easy to mold. If you use the hot runner system can be directly on the product molten resin does not always produce sprue slug, thus shortening the distance between the mold, after molding to facilitate the release.

Hot runner systems, also known as hot runner systems, mainly composed of hot sprue bush, hot runner plate, temperature control electrical box. The most common hot runner system with a single-point and multi-point hot runner thermal gate two forms. Single-point thermal gate is directly injected into the cavity with molten plastic single thermal gate sets, it applies to a single gate single cavity plastic mold; multi-point hot runner hot runner through the plate to melt into each branch heat and sprue bush and then into the cavity, it is suitable for single or multi-cavity multi-feed cavity mold.