Knowledge

Home > Knowledge > Content
Hot runner classification
Apr 27, 2018

Hot runner classification


The hot runner system is divided into a fully hot runner and a semi hot runner. The design of adiabatic runners is complex, but the effect is good and maintenance costs are very low. The miniature semi-hot runner is simple in structure, stable and easy to use, and has a low failure rate. Because the structure is simple, the maintenance cost is low, and the production stability is more assured.

Hot runner classification: open type (for micro-hot runners), needle valve type (for thermal insulation runners).


Open style

The open structure is simple, suitable for micro-hot runner, is not suitable for thermal insulation runners, thermal insulation runners have high limitations on the material, and direct contact with the product surface, easy to appear drawing and leaking, the surface quality is poor; miniature semi-hot runner It does not come in contact with the product but comes in contact with a micro-channel. Therefore, an open thermal nozzle can be used, and it is widely used in foreign high-precision molds.


Needle valve type

Needle valve hot runner saves material, the surface of plastic parts is beautiful, and the internal quality is tight and the strength is high. There are two major types of needle-type hot runners (according to the injection principle) in the world: cylinder type and spring type. The cylinder-type* controller and timing controller control the closing of the cylinder by pushing the needle valve. The structure is relatively complicated, but the design itself is simple. There are DME (United States), INCOE (United States), MOLD-MASTER (Canada), HUSKY (Canada), AKOMA (China) and so on. The Japanese century did not enter the Chinese market. Due to the structural characteristics of the cylinder, the accuracy of the mold is determined to be high. At the same time, the debugging and maintenance are more complicated. Among them, the MOLD-MASTER is called Rolls-Royce in the hot runner. The heating part is on the nozzle. Because of the large cost involved in their commissioning and maintenance, customers cannot basically maintain themselves. The spring type is one of the biggest features of FISA (Japan). It relies on balance control of spring and injection pressure to control the needle valve switch. It is easy to assemble, debug and maintain, and the precision of the mold is not high. Japanese domestic customers basically have their own maintenance ability and are widely used in home appliances. , automotive trim, precision multi-cavity mold. The difference between the spring type and the cylinder is that the timing control cannot be performed and the problem of weld marks cannot be solved well. Based on the successful summarization of thousands of hot runner system experiences, Plastic Beauty technicians have successfully developed: small-diameter wear-resistant nozzles; spring needle valves and internal heating nozzles. Plastic-type hot runners have developed a type of inlaid heater. The heater is directly embedded in the copper sleeve. Because the thermal conductivity of copper is very good, the inlaid copper heater sleeve on the hot nozzle greatly reduces the maintenance cost of the hot runner nozzle. Price positioning or close to (Chinese market price), MOLD-MASTER, INCOE, DME, AKOMA, HUSKY, FISA, SM (Plastic Beauty - China). The foreign popular non-thermal runner is superfluous. In fact, the hot runner mold reduces many requirements on the design, which provides great convenience for designers to develop more mold structures. Plastic Beauty not only inherited the leading technology of Canada's hot runner, but also integrated the related injection molding, electric heating and precision machining technology. The company makes full use of human resources and introduces the most advanced system of on-site production and customer service to create a management system that fully satisfies customers.


Previous: No Information

Next: Hot runner basic summary