Some plastic parts are quickly swollen or bubbling on the back of the metal insert or in particularly thick areas after demoulding. This is caused by the expansion of the released gas under the effect of internal pressure when the plastic is not completely cooled and hardened. There are the following solutions:
  1. Effective cooling, reduce injection mould temperature, extend injection mould opening time, reduce material drying and injection mould processing temperature.
  2. Reduce injection mould filling rate, reduce cycle time, and reduce flow resistance.
  3. Improve holding pressure and time.
  4. Improve the condition that the walls of the products are too thick or vary in thickness.
The five elements that injection moulding needs to meet is temperature, speed, pressure, position and time. These five factors determine the quality of injection moulded parts. And the above five factors are the key point of controlling qualified product quality.
Injection Moulding
Mould is the foundation of industrial manufacturing. It is precisely because of the existence of the mould that the product can be reproduced in large quantities. The injection mould has become an increasingly widely used part of the mould field. Injection moulding companies need to be related to a variety of precision equipment in the process of producing the injection mould. Finally, a set of injection mould can be produced out. And then what production equipment does the injection moulding manufacturer have? 
Injection Machine

The injection mould is a tool for producing plastic products. In the process of plastic injection mould processing, the plastic melted by heat is injected into the mould cavity by the injection moulding machine under high pressure, and after cooling and solidification, the injection moulded products are obtained. What are the features of plastic injection moulding processing?
Injection MouldInjection Moulded Parts
Injection mould is an indispensable tool in the plastic injection moulded parts production industry. Injection mould is generally composed of a total of seven systems: casting system, guiding system, forming system, core pulling system, ejector system, cooling system and exhaust system. The injection mould design is a very important step in the manufacturing of injection mould. In the design process, we need to take into account all aspects, so that finally the designed injection mould is able to meet the production needs. And then what are the points need to pay attention in the injection mould design process?
3D Design of Injection Mould
The components of plastic injection mould can be divided into two
categories according to their use. One type is the structuralMould Steel part, including the casting system, the guide part, the fixed (moving) formwork, the ejector component and the support part etc. The plastic injection mould materials are generally medium and low carbon carbon structural steels or alloys. The other type is moulded part, including cavity, core and inserts, etc., that are the key components of making plastic parts moulded directly. The working temperature of plastic injection mould is 200 to 300 °C. The cavity of plastic injection mould is complex, there are high requirements for dimensional accuracy and the surface roughness, and corresponding requirements are put forward for the machining performance of the plastic injection mould steel, the mirror polishing performance, the heat treatment deformation and the dimensional stability etc,. Therefore, When ACO Mould chooses plastic injection mould materials, while ensuring the performance requirements of plastic injection moulds, as much as possible to improve its processing performance.
Plastic products have been widely used in various fields such as automotive, electromechanical, instrumentation, aerospace and other national pillar industries as well as people's daily lives. Although there are many ways to form plastic products, the most important one is injection moulding. About half of the plastic moulds in the world plastic mould market are injection moulds. In 2006, the total output value of China's plastic moulds was more than 300 billion yuan. China's largest injection mould has a weight of more than 50 tons. The precision of the most precise injection mould has reached 2 microns. In China, Guangdong, Shanghai, Zhejiang, Jiangsu and Anhui are the main production centers. Guangdong accounts for 40% of the total mould production in China, and the proportion of injection moulds further increases, and hot runner moulds and gas-assisted mould levels further increase.
With the development of science and technology, plastic injection moulds have become an essential tooling of producing plastic products in plastic products manufacturing industry. In our real life, plastic products have almost captured all fields. Whether it is the parts of aircraft and cars or some of the commonly used toothbrushes and cups in our daily lives. In fact, those plastic products that are commonly used around us are not produced by the manufacturer one by one according to the drawings, but are produced in batches through plastic injection moulds.

Before the plastic injection moulding manufacturer produce plastic products, the injection mould of this product will be made in advance. After the injection mould is completed, the manufacturer can mass-produce through this mould. Is the plastic injection mould manufacturing process complicated?

In fact, the plastic injection mould manufacturing process is very precise and complicated, because in the real life, plastic injection moulds are applied to various plastic injection moulding products, and many plastic moulded products must be manufactured accurately, such as plastic bottle mouths and caps. The production of them needs to be very delicate, because if there is a little inconsistency, it can't be combined. Therefore, when making plastic injection moulds, it is necessary to pay attention to such problems. The injection moulds must be made very precise which is possible to make high-quality plastic injection moulding products. Of course, for those plastic products that are relatively large and inexpensive, there is no high process requirement. For example, the mould of plastic basin doesn't require too strict requirements for the manufacturing process.
Plastic Injection Mould Factory

The following problems should be noted when making plastic injection mould:
  • Don’t just focus on injection moulding products design, ignore injection mould making.
  • Don't just pay attention to prices. Should have overall consideration from injection mould quality, production cycle, and injection moulding company service.
  • Avoid multi-head collaboration, try to make plastic injection mould making and plastic injection moulded parts processing integration.
The ejector system has a variety of forms. It relates to the shape, structure and plastic properties of the product. Generally, there are ejector pins, jacking tubes, push plates, ejector blocks, pneumatic composite ejectors, etc. The design principles of the ejector system are as follows:
  1. When selecting the parting surface, try to keep the product on the side of the mould release mechanism.
  2. Top output and position balance to ensure that the product is not deformed, not broken.
  3. The thimble should be located where it does not affect the appearance and function of the product.
  4. The use of standard parts as far as possible is safe and reliable for manufacturing and replacement.
  5. The ejection position should be set at a large resistance, not too close to the insert or core. For box type and other deep cavity moulds, the side resistance is the largest and the top surface and side surface should be ejected at the same time so as to avoid deformation of the product.
Injection mould is a tool by injection mould factory used to produce plastic products. It refers to the melted plastic injected into the cavity by injection moulding machine, then formed after cooling and curing. In the process of mould manufacturing, it is very important to determine the delivery date of the moulds, so what factors are related to the time of making the injection mould? So let me introduce to you.
Produce a high quality of injection mould, not only need good injection mould processing equipment and skilled injection mould manufacturing workers, another important factor is to have a good injection mould design, especially for complex injection mould, injection mould design quality accounts for more than 80% of the injection mould quality. A good injection mould design is: in the premise that meet guests' requrement, the processing cost is low, the processing difficulty is small, and the processing time is short.
Injection moulds are parts that give plastic shape and size in moulding. Although thestructure of the mould may vary due to the variety of plastics and properties,the shape and structure of the plastic products and the type of injection machine,but the basic structure is consistent.
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Online tour of our plastic injection mould making factory in Shenzhen China.
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