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1) Large nozzle mold: the runner and gate are on the mold dividing line, which are released together with the product when the mold is opened. The design is the simplest, easy to process, and the cost is low, so more people use large nozzle system for operation.
(2) Fine nozzle mold: runner and gate are not on the mold dividing line, generally directly on the product. Therefore, it is necessary to design an additional set of nozzle dividing line, which is complicated in design and difficult to process. Generally, fine nozzle system should be selected according to product requirements.
(3) the hot runner mold: this kind of mold is approximately the same structure and fine shuikou, the biggest difference is that flow into one or more of the temperature of heat flow but and heat pumping mouth, no cold feeding demoulding, runner and gate directly on the product, so the port don't need mold release, also known as no runner system, this system can save raw materials, applicable to the raw material is more expensive, high requirement of products, design and processing difficulties, mould cost is higher.
Hot runner system, also known as hot runner system, is mainly composed of hot runner cover, hot runner plate, temperature control electric box. Our common hot runner system has single hot runner and multi hot runner. Single point hot gate is used to shoot molten plastic directly into the mold cavity with a single hot gate sleeve. The multi-point hot gate is used to branch the molten material into each hot gate sleeve through the hot gate plate and then into the mold cavity. It is suitable for single cavity multi-point feeding or multi-cavity mold.