Hot runner systems are classified as fully hot runner and semi hot runner. The design of adiabatic runners is complex, but effective and very low maintenance. The structure of semi hot runner is simple, stable and easy to use, low failure rate, low maintenance cost due to the simple structure, and a greater guarantee of stable production.
Hot runner classification: open hot runner (for miniature semi-hot runner), needle valve hot runner (for adiabatic hot runner).
1.Open type hot runner
Open type hot runner structure is simple, suitable for miniature semi-hot runner, not suitable for adiabatic runner, adiabatic runner on the material limitations are high, and direct contact with the product surface, easy to draw and leakage, poor surface quality; miniature semi-hot runner does not contact the product but contact with the tiny runner, so you can use the open hot nozzle, in foreign high precision mold applications more.
2. Needle valve type hot runner saves material and the surface of plastic parts is beautiful, while the internal quality is tight and high strength. There are two major types of needle valve hot runners in the world (based on the injection principle): cylinder type and spring type. Cylinder type according to * controller and timing controller to control the cylinder to push the needle valve to close, the structure is more complex, but the design itself is simple. There are mainly DME (USA), INCOE (USA), MOLD-MASTER (Canada), HUSKY (Canada), AKOMA (China), etc. Among them, Japanese Century has not entered the Chinese market. Cylinder type because of the characteristics of its structure to determine the mold accuracy to be high, while debugging and maintenance are more complex, of which MOLD-MASTER can be called the Rolls-Royce in the hot runner ---- heating part in the nozzle. They are a great cost in debugging and maintenance, customers basically can not maintain their own. Spring type on a - FISA (Japan), the biggest feature, relying on the balance of spring and injection pressure control needle valve switch, assembly debugging and maintenance is simple, mold accuracy is not high, Japan's domestic customers basically have their own maintenance capabilities, widely used in home appliances, automotive trim, precision multi-cavity mold. The difference between the spring type and the cylinder is that it can't be controlled in time sequence and can't solve the problem of fusion marks very well. Plastic beauty technical personnel in the successful summary of thousands of sets of hot runner system experience based on the successful development of: small diameter wear-resistant nozzle; spring needle valve and internal heating nozzle. Plastic beauty hot runner developed a kind of inlay heater, heater directly set to the copper sleeve inside, because the copper thermal conductivity is very good, inlay copper heater set to the hot nozzle above greatly reduces the hot runner hot nozzle maintenance costs positioning or close to (China market price), MOLD-MASTER, INCOE, DME, AKOMA, HUSKY, FISA, SM (plastic beauty - China) . The popular foreign stack mold is not hot runner, in fact, hot runner mold reduces many requirements on the design and provides great convenience for designers to develop more mold structures. Plastic America has not only inherited the leading technology of Canadian hot runner, but also integrated the related injection molding; electric heating and precision machining technology on this basis. 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.
