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With the development of automotive industry, plastic parts have become important part of automobiles. In developed countries, the amount of plastic parts used in automobiles has even become an important indicator of the level of automotive design and manufacturing. We can't list all the plastic parts on the car. Just list a few important automotive plastic parts. Maybe you don't know they are plastic parts.
Automobile plastic Parts
The bumper shell should be the most grievous automobile plastic parts. Many consumers mistakenly think that it is the body of the bumper. The main function of the bumper casing is cushioning and energy absorption. Due to the complicated working environment and large volume, it is generally made of polypropylene (PP) with good quality and good corrosion resistance.
Injection mouldWhether the selected custom injection mould factory regards you as an important customer, that is, whether they value you, this is very important. In fact, looking for a supplier is like looking for an object, but also paying attention to the door-to-door. If your own company's financial strength is not strong and the order amount is not big, blindly choose large-scale mould factory cooperation, sometimes the money spent on them, but they don't take you seriously, at present many large custom injection mould factories are not responsible for the small orders, because you can't reach their requirements in terms of order amount, it will give you the feeling of taking a hot face to touch people's cold butt, this metaphor may not be appropriate, but it is also more relevant and realistic.

In this case, most people will choose small and medium-sized custom injection mould factories for low cost. After all, the price of injection moulds and plastic products is more acceptable. But soon you will find that worrying things are coming again. Can the injection mould be completed on time? Can the quality of injection moulds be good? What is the mass production of the injection mould? What is the life of the injection mould?
To meet the needs of demoulding of the plastic part and the condensed material in gating system and the need of inserts installation, the mould cavity can be appropriately divided into two or more parts, these touch surfaces that can be separated is called parting surface. In the case of poor mould making and insufficient clamping force, the molten plastic in the injection mould will be extruded through the parting surface to form rather thick flash. Although modified, there will be still obvious marks. Parting surface has various types, and the common ones are horizontal parting surface, step parting surface, oblique parting surface, and special parting surface. The parting surface is generally flat, but sometimes it is necessary to use curved surface and stepped surface for the purpose of convenient demoulding. Although the parting surface processing is complicated, the processing of cavity will be easy.
Plastic products have been widely used in automobile, mechanical and electrical, instrumentation, aerospace and other national pillar industries and related to people's daily life. Although there are many forming methods for plastic products, injection moulding is the most important method. In the world plastic mould market, about half of plastic mould output is injection mould. In recent years, the injection mould development in China is very rapid, and the proportion of injection mould with high efficiency, automation, large, micro, precision, high service life in the entire injection mould production is larger and larger. From the perspective of injection mould design and manufacturing, the development trend in China of injection mould can be divided into the following aspects.
Mould is the mother of industry. As the precursor of the mother of industry, the importance of mould steel to injection moulds is self-evident. And the injection mould cost is also derived from the mould steel, because the injection mould manufacturer also quotes the price of the mould according to the price of the materials that mould use, such as the material coefficient method: plastic mould = 6 * material fee.
Calculate with experience:
Injection mould price = material fee + design fee + processing fee and profit + value added tax + mould trial fee + packaging transportation fee
How to find a reliable professional injection moulding manufacturer with reasonable price in China has been a concern of many customers. Many customers will worry that the quality of plastic moulded parts doesn't meet the requirements, and the delivery time won't be on time. And there are so many injection moulding companies on the internet, they don't know which is the most formal and reliable, which is most suitable for them. For these questions, ACO Mould will provide you with some ideas.
How to reasonably choose plastic injection mould steel has been complicated system engineering, and also the key link of plastic injection mould making. It is an important work related to mould service life and plastic injection mould cost. In general, the material used to make plastic injection mould is required to have certain hardness and wear resistance at first. Secondly, it should have strength and toughness. The next is easy to machine. ACO Mold is professional injection moulding manufacturer which produce plastic injection mould and plastic parts.
The quality of plastic injection mould is one of the aspects that the customer cares very much. When the mould is produced out, the customer is most concerned about the mould quality. Because the quality of plastic injection mould is closely related to the injection moulded products. How to judge plastic injection mould quality is difficult, especially business on internet. The mould is different from other products, that we can't ship samples to customers to judge the quality. Since it is impossible to look with naked eye and touch to judge the quality of the mould, we can only find some ways to judge the quality of plastic injection mould remotely.
Injection mould is a tool for producing plastic products, it is also the tool that gives plastic products complete structure and precise dimensions. With the rapid development of plastics industry and the promotion and application of plastic products in the industrial sectors such as aviation, aerospace, electronics, machinery, shipbuilding and automobiles, the requirements for moulds are becoming higher and higher, and traditional mould design methods are unable to adapt to today's requirements. Compared with traditional mould design, computer-aided engineering (CAE) technology has great advantages in terms of improving productivity, ensuring product quality, reducing cost and reducing labor intensity. Today, our lives are closely related to plastic products, and plastic moulds are the most important and main tool for producing plastic products. Therefore, the price of plastic injection moulds has become an aspect of increasing concern.
With the rapid development of plastic moulding manufacturing industry, how to reduce the long development cycle and high cost of injection moulds has become a new goal that everyone is pursuing.

Now China has a low level of casting and it is difficult to achieve mixed casting. For the flanged moulds, high hardness and wear-resistant materials such as GM series, MoGr alloys, and air-cooled steels are generally used in the working part materials. By adopting a mosaic structure and satisfying the high life requirements of injection mould, an integral insert or an integral insert can be selected according to the size of the parts required in the working part.
Precheck of injection mould
Before the mould is installed in the injection moulding machine, inspection should be conducted so that quality problems can be found in a timely manner. And then modify the injection mould to avoid removing after installed. When the injection mould fixing plate and the moving platen are separately inspected, attention should be paid to the direction mark so as to avoid wrong when mould clamping.

Oblique guided mould installation
When installing the mould, the two should closely cooperate with safety. If there is a mould for the lateral parting mechanism, the slider should be installed in a horizontal position, that is, the movable block is moved left and right.
Injection MouldInjection Moulded Parts
Injection mould fastening
After the mould positioning ring is installed in the positioning ring seat of fixing mould plate of injection moulding machine, the mould is closed at an extremely slow speed, so that the movable platen presses the mould gently, and then the pressed plate is used. The pressed plate must be loaded with a pad and must be installed up and down four. When the pressed plate is used, we must pay attention to adjust the height of the screw to the same with the mould foot, that is, the pressed plate should be flat. If the pressed plate is inclined, the die foot can't be pressed tightly. The side of the pressed plate won't be close to the mould to avoid damage to the mould by friction.

Correct the eject distance of eject-rod
After the injection mould is fastened, slowly start the mould until the movable platen stops receding, at this time, the position of eject-rod should be adjusted to the position of between the ejector plate and the movable mould platen on the mould, and there is a gap that not less than 5mm, which is to prevent damage to the injection mould, and can ejecting the injection moulded part.

Ajustment of closed-mould tightness
In order to prevent overflow, but also ensure that the cavity is properly vented, when adjusting the clamping mechanism of hydraulic injection, mainly based on visual observation and experience, that is, when closing the mould, the elbow firstly fast and then slow, that is not very natural and also it is not too reluctant to straighten out, and the closeness of the mould is just right. For the moulds with mould temperature requirements, mould tightness should be corrected after the mould temperature is improved.

Access to cooling water
After connecting the cooling water, check whether it is unblocked or leaking.

After the plastic injection mould factory installs the plastic injection mould into the injection moulding machine, it needs to adjust the installed mould to ensure that the injection moulding produces a high-quality product. What steps must be taken? Let me explain in detail.
After completely positioning the plastic injection mould positioning ring into the positioning ring of the injection machine, the plastic injection mould is just started to close at a very slow speed, the press mould of the injection moulding machine presses it gently, and then the upper press plate of the plastic injection mould is pressed tightly. Then the pressure plate can have 4 - 8 pieces depending on the size of the plastic injection mould. The height of the adjusting screw of the pressure plate must be the same as the height of the die foot to ensure that the pressure plate is flat and the die foot can be pressed. Check the parallelism and verticality of the plastic injection mould, the firmness of the bracket and adjust the concentricity of the barrel and the center hole of the plastic injection mould.
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Online tour of our plastic injection mould making factory in Shenzhen China.
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