What are the advantages of plastic mold used hot runner?

Said into the plastic mold hot runner while using less, but everyone should also not strange, gives the impression of is the mould price is high. Why will have this kind of hot runner system technology appear? What is hot runner technology advantages, whether in the plastic mould manufacturing process out reflects what kind of role? Under the general process, what problems? 一个。 Molding difficult to B. The deformation of thin walled big C. D sprue raw material waste. Multimode cavity mould have different quality of injection molded parts, such as the emergence of hot runner technology, gives these problems provides a comparatively perfect solution, generally speaking, the hot runner has the following advantages: 1. Good small pressure loss in the runner, plastic flow, temperature uniformity, the internal stress of products, the deformation will be reduced, the product surface quality and mechanical properties can be greatly improved; （ Common shrink, underfill, welding scar, uneven color, flash, warping phenomenon can also reduce) ； 2. Eliminate all or most of the flow channel waste, high effective utilization rate of material, don't need to recycle the old material; 3. Shorten the molding cycle, open mold, improve the production efficiency; 4. Hot runner is to cut off the gate automatically, can improve the degree of automation; 5. Reduce the injection pressure, which is beneficial to protect the mold, prolong service life. 6. Multimode cavity mold to ensure the quality of filling uniform and consistent; Every technology has its own disadvantages exist, hot runner technology is no exception, it besides the mould cost is high, the mould structure also is more complicated than, need to strictly control the temperature, need more professional maintenance. General use small batch production mold hot runner price is lower, is not recommended; If the product quantity, unit price, the use of hot runner can not only improve the product quality of injection molding, can save material floolwing head again, and can prolong the service life of mould.