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December 21, 2022
2:18 am

Advantages and disadvantages of two-shot mold and overmold

1. Two-shot mold

2K MOLD-DOUBLE SHOT INJECTION MOLDS

(1) Advantages: It can be molded and processed by ordinary injection molding machines, and the investment in equipment is relatively small;

(2) Disadvantages: It is not suitable for precision double material and multi material injection molding products; The molding processing cycle is relatively long, and the production efficiency is lower than that of the two-color mold.

2. Overmold

(1) Advantages: – The molding process is fast, the processed products have a more beautiful appearance, and can process precise two-color or even multi-color (multi-color or multi material injection molding, and corresponding barrel and screw plasticizing device need to be added) products; For products that are difficult to be bonded, such as hard glue PA and soft glue TPE, the two-color mold is used for injection molding, which is better than the plastic wrapping mold;

overmold

(2) Disadvantages: The Two-shot mold requires a special two-color injection molding machine, but the cost of the two-color injection molding machine is much more expensive than the ordinary injection molding machine.

Selection of hard glue and soft glue commonly used in Two-shot mold or overmold:

The two-color mold or overmold is usually the composite molding of hard glue and soft glue. In theory, almost any kind of plastic can be used as the choice of hard glue, but in fact, considering the adhesion between soft glue and hard glue, the selection of hard glue varieties should be considered. Common hard adhesives include ABS, AS (SAN), PC, PC/ABS, PE, PP, PS (HIPS, GPPS), MBS (transparent ABS), etc; Hard adhesives such as PA (PA66 and PA6), PBT and POM are difficult to match with soft adhesives with good adhesion; The commonly used soft adhesives are TPE, TPR, silica gel, PVC, TPU, TPV and TPEE. Different types of hard glue need to be matched with corresponding types of soft glue and formula models, so as to achieve the best injection bonding performance.

Eight Common Injection Mold Structure Classification

14/01/2023 No Comments

Eight common injection mold structure classification One. Single parting surface injection mold When the mold is opened, the movable mold and the fixed mold are separated, so as to take out the plastic parts, which is called single parting surface mold, also called double-plate mold. It is the simplest and most basic form of injection mold, which can be designed as single-cavity injection mold or multi-cavity injection mold according to the need, and is the

Injection Mold Manufacturing Process And The Basic Processing Process Analysis

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Injection mold manufacturing process and the basic processing process analysis The injection mold manufacturing process mainly includes. Acceptance of the task. Mold design. Mold manufacturing. Mold inspection and mold trial. Mold modification and repair. Mold maintenance. I. Acceptance of tasks Plastic mold making, first of all, the customer engineers provide product drawings to the mold manufacturer, the manufacturer through the molding plastic production task requirements, the process of collecting, analyzing, digesting product data, this is

The Difference Between Injection Moulds And Plastic Moulds

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The difference between injection moulds and plastic moulds Many people can’t tell the difference between injection molds and plastic molds, and many people even think that they are the same kind of molds, just called different. Although injection molds and plastic molds are both molds, but there is a difference between them. Want to figure out the difference between the two, first and Xiaobian together to understand what is injection mold, what is plastic mold.