The hot runner is to keep the plastic in the runner and gate in a molten state by heating. Since there are heating rods and heating rings near or in the center of the runner, the entire runner from the nozzle outlet of the injection molding machine to the gate is in a high temperature state, so that the plastic in the runner keeps melting. Generally, it is not necessary to open the runner to take out the condensation When starting the machine again, it only needs to heat the runner to the required temperature. For this reason, the hot runner process is sometimes referred to as a hot manifold system, or as runnerless molding.

Advantage:

1. Save raw materials and reduce costs.
2. Shorten molding cycle and improve machine efficiency
3. Point gates can be used without using three-plate molds.
4. It can make the internal molecular structure of the product more stable and improve the mechanical properties.
5. Increase the degree of automation.
6. The number of products that can be injection molded at the same time (that is, the number of products per mold) is more, and the output is higher.
7. The quality of the injection molded parts of the multi-cavity mold is consistent.
8. Improve the surface aesthetics of injection molded products.
9. Smaller injection pressure can be used, which can effectively reduce the post-deformation of thin-walled products.

Disadvantage:
1. The mold structure is complex, the cost is high, and the maintenance cost is high.
2. It takes longer time for the process to be stable after starting up, resulting in more waste products at the beginning.

Niuli Electric uses newly automatic hot runner injection molding system, specializing in the production of nylon cable ties, welcome to inquire and cooperate.