The principle of mold temperature balance in plastic mold cooling system design

The principle of mold temperature balance:

1. Due to the complexity of the plastic parts and mold structure, it is difficult to make the temperature of the mold completely consistent, but should be make the mold temperature as balanced as possible, and there should be no local overheating or overcooling.

2. The high temperature areas in the mold including: near the sprue bushing, near the gate, and near the thick wall of the plastic part, these areas should be cooled.

3. Heating is sometimes required at thin-walled areas.

4. During the cooling process of the mold, due to the phenomenon of thermal expansion and contraction, the plastic part will slightly detach from the fixed mold cavity when the solid shrinks, while the tightening force on the core is getting bigger and biggger, and the plastic part is detaching, the more heat before demolding is transferred to the core, so the core must be focused on cooling.

5. To control the temperature difference of the cooling water at the inlet and outlet of the cooling channel, the temperature difference should be less than or equal to 2°C during precision injection molding, and in general, the temperature difference should be less than or equal to 5°C. the total length of the cooling gate (series length) should not be too long, preferably less than 1.5m, and the length of the dead zone should be as short as possible.

6. The cooling channel must be designed for the stripper in the three-plate mold, t, so that the mold temperature can be stabilized during the production process and the molding cycle can be shortened.

图片1_(3).png

Tags: Injection Mold | Injection Mold Supplier | Injection Mold Factory | Mold Factory | Mold Supplier | Injection Molding |
Related News about USM Injection Mold
  • Side gate of plastic injection mold runner system design

    Side gate of plastic injection mold runner system design

    Jan 23, 2022In order to get the best injection quality, the gate type must be selected carefully, the coommon gate tyeps are: direct gate, side gate, pin-point gate, sub gate,valve gate of hot runner etc. Among...view
  • The air trapping position in cavity and exhaust method

    The air trapping position in cavity and exhaust method

    Mar 2, 2022The air trapping in cavity is usually in the following places: 1. Thin-wall structure cavity, the end of melt flow; 2. The junction of two or more melts; 3. The last area where the melt in the cavity...view
  • Factors affecting the cooling rate of parts by injection molding

    Factors affecting the cooling rate of parts by injection molding

    Feb 9, 2022It should be shaped by cooling to get stable plastic part after plastic filling the cavity and core side, so most injection molds need to be equipped with cooling devices to make the mold temperature...view
  • Design principle of plastic injection mold cooling system

    Design principle of plastic injection mold cooling system

    Feb 13, 2022Design principle of cooling system In order to improve the efficiency of the cooling system and make the cavity surface temperature distribution even, the following principles should be followed in...view
  • Slider designing tips 2

    Slider designing tips 2

    Nov 22, 20239. The molding parting surface of the slider molding should be made as a shut-off surface as possible, and the width of the shut-off part should be at least 8mm, and do not make a shut-off surface;...view
  • Slider angle designing tips

    Slider angle designing tips

    Dec 4, 20231. Normally, all the insertion slopes of the slider are not allowed to be less than 3° to prevent excessive self-locking force and scratched; 2. The angle of the locking surface must be bigger than...view