Precision injection molds can be divided into three categories according to the type of casting system.
Hot runner mold, hot runner system, also known as hot runner system, mainly consists of hot runner sleeve, hot runner plate, temperature control electrical box. Our common hot runner system has single hot gate and multi hot gate. Single-point hot sprue is to use a single hot sprue sleeve to directly shoot molten plastic into the mold cavity. Multipoint hot runner by hot water but the molten material branch to various points in the hot runner set into the cavity, it is suitable for single cavity more into the material or multi-cavity mold. This mold is approximately the same structure and fine shuikou, its quite big district is port in one or more heat flow but and constant temperature 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.
Large nozzle mold: runner and sprue are on the parting line, and the product is demoulding together when the mold is opened. The design is quite simple, easy to process and low cost, so more people use the large nozzle system.
Fine nozzle mold: runner and gate are not on the parting line, generally directly on the product, so we need to design more than a set of parting line, the design is more complex, processing is more difficult, generally depending on the product requirements and choose the system of fine nozzle.