Electronic production tooling, plastic injection mould/tool/die

Electronic production tooling, plastic injection mould/tool/die

Service Details:

  • Brand:Kayou
  • Serial Number: M-0170
  • Country of Origin:Shenzhen, China
  • Certificate:ISO9001

Payment & Shipping Terms:

  • Price Quote:Negotiable
  • Minimum Order: 1
  • Average Delivery Time:25 days
  • Payment Method:T/T
  • Package Details:Wooden Case
  • Ability to Supply:5 Set/per month
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Electronic production tooling, plastic injection mould/tool/die

Description

Electronic production tooling, plastic injection mould/tool/die

For products requiring different quality requirements, different mould temperatures should be used. For example, in the production of high crystallinity PET products (suitable for electrical fittings), the mould temperature is required to reach about 80 C. At this time, the cooling system of the mould is not required, while in the production of transparent PET products, the mould temperature should be controlled between 25 and 40 C, and the mould temperature should be adjusted by cold water.

In order to ensure the uniformity of cooling and the quality of large plastic parts, especially when the wall thickness is uneven and the shape and geometry are irregular, temperature control devices, such as local heating, are set in the mould when necessary. Temperature control system installed in the mould will bring some problems to injection moulding, which need to be overcome. For example, when cold water is used to cool the mould, moisture in the atmosphere is easy to adhere to the surface wall of the cavity, thus affecting the surface quality of the product. Therefore, under the change of temperature, the requirement of matching dimension of each matching part is increased, and heating and cooling will have a negative impact.

Design Principle of Medium Cooling Circuit

Water cooling is the most common way of cooling injection moulds. In the die, the circular loop form of the outlet and the inlet is made, and the heat exchange occurs with the die through the inflow and outflow of the medium. Here are some principles of cooling water channel arrangement in die.

The temperature of the surface wall of the cavity is related to the number of cooling channels and the temperature of the cooling water. Generally, the larger the cross-section size of the channel, the larger the flow rate of heat exchanged with the die, the better the cooling effect. Generally, more cooling water channels are added to increase the flow rate to promote heat transfer.

The cooling water channel should be close to the surface wall of the die cavity, and according to the cooling effect, the closer the balance is to the surface wall of the die cavity, the better the cooling effect of the water flow on the surface wall of the die cavity and the lower the temperature of the surface wall of the die cavity. However, it is necessary to ensure that the die cavity has sufficient strength for the balance of the cooling effect. For the parts with uniform wall thickness, the cooling water channel should be with the die cavity. The distance between the surface wall is equal. There is a gap in wall thickness. In order to accelerate the cooling of the thick wall part, the distance between the cooling channel and the surface wall of the cavity can be appropriately close.

When the inlet of cooling water channel is close to the gate, the temperature near the gate is the highest and the temperature far from the gate is lower. Therefore, the cooling of the mould should be strengthened near the gate. The specific method is to set the entrance of the cooling water path near the gate, so that the mould part near the gate can be cooled at a lower water temperature, while the mould part far from the gate is cooled by warm water after a certain degree of heat exchange. At this time, the cooling of the whole pair of moulds is more balanced.

 

 

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Electronic production tooling, plastic injection mould/tool/die

 

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