TZM hot runner nozzle makes injection molding easier

                     Transfer from China Molybdenum Industry News Net

Hot runner injection molding is a method of injecting the molten plastic material in the hot runner into the mold cavity at high pressure, and then cooling and solidifying to obtain various plastic products. It has the advantages of fast production speed, high efficiency, diverse product shapes, and accurate dimensions. It is widely used It is used to prepare plastic products with complex shapes and is involved in the fields of electronic connectors, auto parts, precision parts, bottle cap packaging and so on.

As a common component of the hot runner system, the nozzle can be heated to ensure that the plastic in the runner and gate remains molten. Many plastic products require very precise processing temperatures. If the temperature is too high, the material may be damaged; if the problem is too low, the product will harden and can no longer flow optimally into the mold. Therefore, the heat transfer in the hot runner nozzle is very important.

When using hot runner molds for injection molding, general plastic materials generally have no problems in the production process. However, many types of plastics contain very hard additives, such as glass fibers or pigments, and the nozzle tip is very easy to wear. Once the tip of the nozzle is worn, the gate will first become larger, and eventually the heat will not be conducted to the front section, leading to cold glue. At this time, the nozzle must be replaced for normal production, and frequent replacement of nozzle pairs will cause a lot of trouble in production.

The wear resistance and good thermal conductivity of the nozzle material are particularly important for hot runner systems.

In conventional metals such as steel, thermal conductivity is generally insufficient. Although copper has a high thermal conductivity, it cannot withstand the abrasion of plastics. TZM has an extremely high thermal conductivity of 140W/mK, and has excellent high temperature performance, corrosion resistance and processing mechanical properties, which can meet the requirements of hot runners for long-term use at high temperatures, and can be made into nozzles of different shapes for use in hot runner systems .

TZM hot runner nozzle has the following advantages:

1. Uniform temperature management

2. Optimal thermal separation

3. Easy to install and leak proof

4. The nozzle tip area has a good insulation layer

5. The highest operating temperature is 450℃

6. Up to 50% energy saving

7. Higher mechanical stress

8. Excellent wear resistance