Tag - china custom injection molding

Analysis of possible factors of discoloration of black spots on injection molded parts

1. Machine
As the heating control system is out of control, the barrel is overheated and decomposed into black
Due to the defects of screw or barrel, the molten materials are stuck in and accumulated, and the decomposition is caused by long-time fixed heating. Check whether the rubber head kit is worn or whether there are metal foreign matters in it
Some plastics, such as ABS, are cross-linked and coked by high heat in the barrel. They are difficult to melt under […]

Suggestions on the installation of injection mold

1. Preparation before installation
Confirm the cooling water channel, and the screw depth into the machine plate is 1.5-1.8 times of the screw diameter. If the screw is not enough, it is easy to slide the teeth, and there is a risk of mold falling. Confirm whether the operators, materials, tools, documents, equipment and auxiliary equipment required for production are complete.
2. Method of lifting formwork
When the hanging die is not horizontal, there will be segment difference between the front and […]

What are the differences between plastic injection mold and silicone mold?

1) Differences in materials used:
Silica gel mold is a special mold shellfish glue for making artworks. Generally, silica gel and epoxy curing agent are mixed according to a certain proportion, and then dried and formed under indoor temperature or heating standard. It has the characteristics of heat resistance, corrosion resistance, strong tear resistance and high simulation precision. Silica gel belongs to thermosetting plastic raw materials, generally all die-casting. Silica gel has good liquidity, so silica gel mold does not […]

What points should be paid attention to in the process of precision injection mold processing?

As a production tool of plastic products, precision injection mold determines the shape, specification and appearance of plastic products. Precision injection mold processing, the general production material for steel, by moving mold and fixed mold composition.
As the precision injection mold has the characteristics of easy wear, the maintenance in the process of precision injection mold processing is very important, which basically includes the following aspects:
1) Prevent rusting: prevent water leakage and condensation of water in precision injection mold.
2) Anti […]

Plastic injection molding in medical device industry

Medical device products have various shapes, sizes and cost ranges. Some of the lower cost products can be plastic instruments, syringes, disposable gloves, etc., as well as other disposable products used in the hospital environment. You may find that plastic products have replaced many glass products of the past because the plastics available are cheaper and easier to recycle after use.
High performance resins and polymers are used in pharmaceutical grade plastics under high cost planning. These specialized plastics are […]

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 […]