PC board processing technology type

1, PC board cutting

Cutting is the basic process of PC board processing, the requirements are low, the current use of manual use of sawtooth blade manual cutting, high efficiency and low cost, cutting accuracy depends on whether the personal experience is rich;

2, PC board engraving

PC board engraving is generally divided into two kinds of laser engraving and drill engraving, but laser engraving will leave black marks, so drill engraving has also become the first choice of engraving process. The engraving process can not only meet the requirements for the shape of PC board products, but also effectively save costs;

3. The PC board is bent

PC plate bending process is divided into cold bending processing and hot bending processing, bending process for the PC plate itself also has requirements, the need for high quality, otherwise it will produce bubbles in the heating process, affecting the appearance. At the same time, in the processing process, the tool must be sharp, the speed also needs to be as fast as possible,

4, PC board polishing

PC board polishing is mainly for the subsequent process steps of the PC board after cutting and engraving, after cutting and engraving, the surface of the PC board will be partially rough and need to be polished. Under normal circumstances, tools such as utility knives and wool pads are used for polishing;

5. PC board bonding

A special adhesive is used for the bonding process of the PC board. During the bonding process of the PC board according to the target product, great attention should be paid to the handling of the glue after the bonding is complete, so that the interface is smooth and smooth.

We OTEM Engineering Plastics Co., Ltd. has more than 20 years of experience in the production of PC products, plastic wire clips, plastic gaskets and other customized production, with a physical processing plant, professional production equipment and professional design team to bring customers satisfactory products and services.

PC Mylar die cutting process advantages

1. High efficiency

Can complete multiple cutting areas at the same time processing, improve production efficiency.

2. Accuracy

Can achieve high precision machining effect, cutting size, shape, position accurate.

3. Flatness

It can ensure the flatness of the cutting edge and reduce burrs and other problems.

PC processing some precautions

1. Pre-processing of materials

PC plastic has a great water absorption, in order to obtain better processing results, the early stage to do a good drying treatment, in the drying process to control the temperature and time, if it is pure PC, the drying time to be more than 4 hours. It is worth noting that the use of recycled materials to control its proportion, generally below 20%, if mixed, to avoid the appearance of different masterbatches, so that the quality of the processed product will have a great impact.

2, the selection of injection molding machine

Regarding PC injection molding, the selection of injection molding machine is also very critical, the plasticizing system of the injection molding machine is generally required to have excellent mixing and corrosion resistance, and there are many rigid requirements for specific parameters, such as the injection speed is fast, the injection pressure can be scheduled to be wide, and it can be flexibly adjusted according to the requirements of the actual production products. The injection molding machine is stronger in terms of functionality, so that there will be more space for the processing of PC plastic products.

3, mold and gate design

The temperature of the mold in the injection molding process is very critical, for different plastic materials, to control the corresponding temperature, PC injection molding itself is better for temperature requirements, to be controlled within a reasonable range. According to the size of the product, the depth of the design of the gate is also different, in general, the gate is better, which can reduce the defects of plastic products, and the flow path should be short and round, so the effect will be better.

4, injection molding processing melt temperature requirements

The injection temperature can be determined by air injection method. General PC processing temperature is 270-320 ¡ã C, some modified or low molecular weight PC is 230-270 ¡ã C.

5, the injection speed of dust-free injection molding

More commonly used faster injection speed molding, such as electrical switch parts. Common for slow ¡ú rapid prototyping.

6. Back pressure

The back pressure of about 10bar can be properly reduced in the case of no gas lines and mixed colors.

7. Retention time

If the residence time is too long at high temperature, the material will degrade, emit CO2, and become yellow. Do not use LDPE, POM, ABS or PA to clean the barrel. Use Photoshop to clean up.

8, dust-free injection molding precautions

Some modified PC, due to too many times of recovery (molecular weight reduction) or uneven mixing of various components, easy to produce dark brown liquid bubbles.

The reason why injection molding transparent PC is not transparent enough

1. Poor quality of raw materials.

The production of transparent PC requires the selection of high-purity raw materials, and strictly control the parameters in its processing, such as temperature, pressure, speed, and so on. If the quality of raw materials is poor or improper control during processing, it will lead to insufficient transparency of the product.

2, injection molding process problems.

Injection molding is a high-precision processing method that needs to be carried out at a certain temperature, pressure and time. If there is deviation or non-standard operation in the injection molding process, it will affect the transparency of the product. When the melt fluidity is too strong or too weak during injection molding, it will lead to bubbles or heat shrink marks on the surface of the product, thus affecting the transparency.

3, mold design and manufacturing problems.

Mold is a crucial part of injection molding, and its design and manufacturing directly affect the molding effect of the product. If the design and manufacturing of the mold is not reasonable, it will lead to problems such as the surface of the product is not smooth, the color difference is large, and the deformation is deformed, thus affecting the transparency.