PU High Pressure Injection Moulding Machine

The injection pressure is the force exerted by the reciprocating screw to push the molten plastic resin into the mold cavity, which is about 90% of the capacity. It is balanced with the clamping pressure of the machine and calculated according to size and shape of the parts and the size of gate opening. Compared with ordinary injection molding machine , the ZOWEITE®  PU High Pressure Injection Moulding Machine of has secondary mold locking and pressure maintaining. When the first is injected into the mold cavity for a period of time, the moving template of the clamping mechanism should move back slightly to separate a small amount between the moving and fixed mold of the mold, which is the expansion of the mold cavity and the use of plastic in the mold for molding.

What is the difference between PU High Pressure Injection Moulding Machine and low pressure injection?

Low pressure injection molding is a new injection molding process between potting and high pressure injection molding

The biggest difference between low-pressure injection molding and high-pressure injection molding is that the injection pressure is different. The injection pressure range of high-pressure injection molding machine is generally 350-1300bar, and that of low-pressure injection molding machine is generally 1.5-40bar. In addition, the differences between low-pressure injection molding and high-pressure injection molding are as follows:

1. Different injection temperatures: high pressure injection molding at 230-300 ℃, low sub injection molding at 180-240 ℃

2. Different injection molds: PU High Pressure Injection Moulding Machine has large injection clamping force, and the mold adopts steel. Low pressure injection molding does not need large tonnage clamping force, and the mold can be made of aluminum;

3. Different injection materials: poor adhesion between high-pressure molding machine injection rubber and products, good adhesion between low-pressure injection molding rubber and products, and water tightness;

4. Different application fields: PU High Pressure Injection Moulding Machine can not inject glue sensitive components, while low-pressure low-temperature injection molding of low-pressure injection molding is very suitable for the packaging of electronic components.

What are the advantages of PU High Pressure Injection Moulding Machine?

Reduce injection time and shorten molding cycle. KC series machines are high-pressure molding machines, specially designed for lunch boxes. The molding cycle is about 5-6 seconds, which shortens the molding cycle, saves customers' production time and improves the output.

ZOWEITE® PU High Pressure Injection Moulding Machine can improve the surface gloss of products; It can improve the strength of the welding line, make the welding lines not obvious, and prevent cooling deformation.

Advantages of PU High Pressure Injection Moulding Machine

1) Fast production speed and high efficiency. Injection molding can produce an amazing number of parts per hour. The speed depends on the complexity and size of the die, and each cycle time is between 15-120 seconds.

2) Low labor cost. Plastic injection molding is an automatic process, most of which is completed by machines and robots and controlled and managed by a single operator. Automation helps reduce manufacturing costs because overhead costs are significantly reduced.

3) Design flexibility. The mold itself bears extremely high pressure. Therefore, the plastic in the mold is pressed harder, allowing a large number of details to be stamped on the parts, and allowing the manufacture of complex or complex shapes.

4) High yield. Thousands of parts can be produced before maintenance tools are needed.

5) A large selection of materials. There are a large number of polymer resins to choose from. A variety of plastic materials can also be used at the same time; For example, TPE can be overmolded onto PP parts.

6) Low scrap rate. Compared with the traditional manufacturing process, injection molding produces little late waste. Any waste plastic usually comes from gates and runners. However, any unused or discarded plastic can be reground and recycled for future use.

7) Can contain inserts. Metal or plastic inserts can be molded.

8) Good color control. Plastic parts can be made of masterbatch or composite materials in any required color.

9) Product consistency. Injection molding is a repeatable process; In other words, the second part you produce will be exactly the same as the first part, and so on. This is a great advantage in mass production of high tolerance and part reliability.

10) Reduce finishing requirements. Post production work is usually rarely required because parts usually have a good finished appearance when ejected.

11) Increased strength. During plastic injection molding, fillers can be used in molding materials. These fillers reduce the density of the plastic during molding and help to improve the strength of the finished product.

ZOWEITE® have 30 years experience in injection molding machine industry and got SGS/ ISO certificate. We have our own R&D team and rich production, which can enable us to better provide technical guidance to customers. We can provide Turn-key project for customers, including PU High Pressure Injection Moulding Machine, mold, auxiliary equipment and plant design. We will launch different injection molding schemes according to different customers to help customers gain advantages in market competition and meet customers' requirements of high efficiency, precision, energy conservation and environmental protection