Tag - china plastic injection molding

Why does plastic injection mold burst during operation?

In recent years, The development of domestic plastic injection mold is very fast, and the technology has also been greatly improved. However, there is still a certain gap between the domestic and foreign plastic injection mold manufacturing level. In the process of plastic injection mold operation, there will still be some failures. For example, during the operation of plastic injection mold, the mold will burst, which is a very serious mold table defect What are the causes of the […]

Selection of gate position in precision injection mold design

The gate design of precision injection mold can make the flow velocity of molten plastic transported by sub channel produce acceleration, form ideal flow pattern and sequence, and quickly fill the mold cavity. At the same time, it also plays the role of closing the mold cavity to prevent the molten material backflow, and it is convenient to separate the gate from the plastic part after molding. Since the gate plays such an important role in the design of […]

How to do quality inspection for plastic mould?

Plastic products to do well, all rely on the plastic mold “support.”. With the development trend of industrialization, the application of plastic mold has been everywhere. In the production process of plastic products, the quality of plastic molds determines the quality of finished products. Therefore, the practical significance of plastic molds for plastic products is of course obvious. Generally, the cost of plastic mold customization is high, and the quality of plastic mold is related to whether the mass […]

Common problems in spray processing of plastic products

Seven common problems in spraying plastic products: appearance: cause of granulation: the working site is not clean, dust mixed into the paint; paint and curing agent have occurred copolymer particles after the paint has been distributed for a long time; the amount of oil from the spray gun is too small and the air pressure is too high, so that the paint atomization is not good or the spray gun is too close to the object surface.
Clean the spray […]

How to solve the matte surface of plastic injection parts?

Low gloss means that the surface is dark and dull, and the transparency of transparent products is low. There are many reasons for poor gloss. The surface gloss defects of general products can be divided into the following three types: plastic mold failure, improper molding conditions, improper use of raw materials.
 
Injection mold failure
Because the surface of the plastic part is the reproduction of the surface of the mold cavity of the plastic mold, if the surface of the plastic […]

Is brittle fracture of plastic products the reason?

Brittle fracture often occurs in the production of plastic products. What is the cause? JasonMould with 15 years of mold manufacturing experience summed up the following causes of brittle fracture?
1. Insufficient injection and packing pressure of injection molding machine;
2. The back pressure is too small and the raw materials are not solid enough;
3. If the back pressure is too high, the heat of shearing and friction will increase;
4. The rate of fire is too slow to crystallize sufficiently;
5. The […]

How to prevent the repeated test of injection mold?

Most people are particularly concerned about “how much is the cost of the injection mold?” In general, the cost accounting of injection mold is mostly traceable. But there are also some cases where the cost of the injection mold will be increased. One of them is repeated trial. The repeated trial mold not only increases the cost of injection mold, but also delays the time of product putting into the market, which is very disadvantageous for customers to seize […]

Raw material purchasing process of plastic mould

In order to maintain stable quality and high production life of plastic mold, the importance of the quality of steel used is self-evident. The quality of steel directly affects the life of plastic mold quality. Therefore, in the selection of plastic mold steel, we need to consider the mold steel material suitable for customer demand.
In general, if the customer requires a high output, the steel with higher hardness must be selected, otherwise it is easy to wear and tear, […]

What causes short shot of plastic mold in injection molding?

Short shot refers to the phenomenon that the cavity of plastic mold is not completely filled due to the insufficient fluidity of plastic, resulting in incomplete plastic products. The main reason is improper injection pressure and speed (including excessive pressure loss caused by resistance), which is mainly affected by the following aspects:
 
1、 Injection molding machine
(1) Insufficient injection molding capacity – this is caused by the high capacity of the injection molding machine, which may also be caused by insufficient […]

How to ensure the precision of injection parts in high precision injection mold factory?

The characteristics of high precision injection molding are as follows:
The specification of injection molded parts has high precision and small dimensional tolerance.
To ensure the requirements of high precision injection molding, the necessary standards are as follows:
1. Good die material, enough stiffness, die specification accuracy, smoothness and precision positioning between the templates should be high.
2. High precision injection molding machine should be selected.
3. High precision injection molding process should be selected.
4. Plastic materials suitable for high precision injection molding process […]