一、 Advantages of a hot runner system:

1. Saving plastic raw materials: In pure hot runner molds, there is no production waste due to the absence of a cold runner. This is particularly significant for expensive plastic application projects. In fact, the major international hot runner manufacturers have achieved rapid development in the era of high prices for petroleum and plastic raw materials in the world. Because hot runner technology is an effective way to reduce material costs and reduce material costs.

二、 Characteristics of the hot runner system:

(1) Plasticization: i.e. glass state, high elasticity state (rubber state), viscous flow state (plasticizable state), decomposition state.

Glass state: 0-T1, molecules are in a frozen state, hard and brittle, and are prone to cracking under pressure.

Viscous flow state (plasticizable state): T2~T3, can be processed and formed at will.

Decomposition state: T3, plastic begins to crack, gas decomposition products appear, and even reach a burnt state.

(2) Forming conditions: The finished product is formed by a hot runner mold, without the need for trimming gates or recycling cold runners. Beneficial for production automation. Many foreign product manufacturers combine hot runner with automation to significantly improve production efficiency.

Forming cycle: Due to the lack of cooling time limitations in the runner system, the parts can be ejected in a timely manner after forming and curing. Many thin-walled parts produced using hot runner molds can have a forming cycle of less than 5 seconds.

Expanding application scope: Many advanced plastic forming processes have been developed based on hot runner technology. For example, PET pre molding production, multi color co injection in molds, multi material co injection process, STACK MOLD, etc.