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Classification of Plastic Molds

Plastic molds can be divided into three types based on the different injection molding system: 

(1) Edge gate mold: The runner and gate are located on the parting line and are released together with the product during mold opening,

(2) Pin-point gate mold: The runner and gate are not on the parting line, usually directly on the product, so it is necessary to design an additional set of water nozzle parting lines, which is more complex and difficult to process. Generally, a fine nozzle system should be selected according to product requirements.

(3) Hot runner mold: This type of mold has a structure similar to that of a fine nozzle, with the biggest difference being that the runner is located in one or more hot runner plates and hot nozzles with constant temperature, without cold material demolding. The runner and sprue are directly on the product, so the runner does not need to be demolded. This system is also known as a no nozzle system, which can save raw materials and is suitable for situations where raw materials are expensive and product requirements are high. Design and processing are difficult, and mold costs are high.

Hot runner system, also known as hot runner system, mainly consists of hot runner sleeve, hot runner plate, and temperature control electrical box. Our common hot runner systems come in two forms: single point hot runner and multi-point hot runner. Single point hot gate is a plastic mold that uses a single hot gate sleeve to directly inject molten plastic into the mold cavity. It is suitable for plastic molds with a single cavity and a single gate; Multi point hot runner is a method of branching molten material into different hot runner sleeves through a hot runner plate before entering the mold cavity. It is suitable for single cavity multi-point feeding or multi cavity molds.