Classification Of The Plastic Molds

- Dec 21, 2018-

As we all know that there are many kinds of plastic molds. How do we know which one we need for our new product? Check this article out, you will see.


Classification of plastic molds

A. Injection molding die--TV casing, keyboard buttons, electronic products, computer peripheral plastic products, toys, household goods (the most common application)


B. Blowing mold--beverage bottle


C. Compression molding die--bakelite switch, scientific porcelain dishes


D. Transfer molding die--integrated circuit products


E. Extrusion molding die--, plastic bag


F. Thermoforming mold--transparent molded packaging shell


G. Rotary molding die--soft plastic doll toy


Molds can be divided into three categories depending on the type of gating system:

(1) Large nozzle die : The runner and gate are on the parting line, and the product is demolded together when the mold is opened. The design is the simplest, easy to process, and the cost is low, so many people use the large nozzle system.
(2) Fine nozzle die: The runner and gate are not on the parting line, generally directly on the product, so it is necessary to design a set of nozzle parting lines. The design is more complicated and difficult to process. Generally, it depends on the product requirements. Sluice system.
(3) Hot runner mold: This type of mold structure is basically the same as the fine water nozzle. The biggest difference is that the flow channel is in one or more constant temperature hot runner plates and hot nozzles, no cold material release, flow channel and pouring. The mouth is directly on the product, so the flow channel does not need to be demoulded. This system is also called the waterless mouth system, which can save raw materials, is suitable for the case where the raw materials are expensive and the product requirements are high, the design and processing are difficult, and the mold cost is high.
The hot runner system, also known as the hot runner system, is mainly composed of a hot sprue bush, a hot runner plate, and a temperature-controlled electric box. Our common hot runner systems are available in single-point hot gates and multi-point hot gates. The single-point hot gate uses a single hot sprue sleeve to directly inject the molten plastic into the cavity. It is suitable for a single-cavity single-gate plastic mold. The multi-point hot gate branches the molten material to each through a hot runner plate. The hot runner is re-entered into the cavity, which is suitable for single-cavity multi-point feeding or multi-cavity molds.



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