As we all know, injection molding is a broadly knowledgeable, technical and practical industry. Plastic raw materials, toners, nozzle materials, molds, injection molding machines, peripheral equipment, fixtures, sprays, various auxiliary materials and packaging materials are used in the injection molding production process, which brings a lot of work to the management of the injection molding workshop The amount and part of the difficulty.

Cooling is an important part of the injection molding process, but sometimes the cooling rate is too slow. So, what are the factors related to the cooling rate of injection molding? Let's talk about Jinhua blow molding processing, Jinhua injection molding processing and Jinhua plastic toy manufacturers.

1. In terms of injection molding processing planning, it is mainly the wall thickness of plastic products. The greater the thickness of the product, the longer the cooling time. Generally speaking, the cooling time is approximately proportional to the square of the thickness of the plastic product, or proportional to the 1.6th power of the diameter of the large runner, that is, the thickness of the plastic product is doubled, and the cooling time is increased by 4 times.

2. Mould material and its cooling method. Mold materials, including mold core, cavity materials and mold base materials have a great influence on the cooling rate. The higher the thermal conductivity of the mold material, the better the effect of transferring heat from the plastic per unit time, and the shorter the cooling time.

3. How to equip cooling water pipes. The closer the cooling water pipe is to the mold cavity, the larger the pipe diameter and the larger the number, the better the cooling effect and the shorter the cooling time.

4. Coolant flow rate. The larger the flow of cooling water (generally the better to reach turbulent flow), the better the effect of cooling water to take away heat by thermal convection.

5. The nature of the coolant. The viscosity and thermal conductivity of the coolant will also affect the thermal conductivity of the mold. The lower the viscosity of the coolant, the higher the thermal conductivity and the lower the temperature, the better the cooling effect.

6. Plastic selection. Plastic refers to the measurement of the speed at which plastic conducts heat from a hot area to a cold area. The higher the thermal conductivity of the plastic, the better the heat conduction effect, or the lower the specific heat of the plastic, the temperature is prone to change, so the heat is easily dissipated, the heat conduction effect is better, and the required cooling time is shorter.

7. Processing parameter setting. The higher the material temperature, the higher the mold temperature, the lower the ejection temperature, and the longer the required cooling time.