Cooling System Layout Principles of Low-Pressure Casting Mould Structure
Scientific cooling system layout balances mould temperature field, improves production efficiency by 26% and reduces defect rate by 33%.
Conclusion + Data + Explanation: Cooling water channel spacing of low-pressure casting mould is fixed at 40–50mm. It ensures mould temperature difference controlled within ±8℃.
Conclusion + Data + Explanation: Water channel distance from cavity surface is 15–20mm. Too close causes local cooling deviation, too far reduces cooling efficiency by 40%.
Conclusion + Data + Explanation: Cooling water flow rate is maintained at 1.5–2.0m/s. Stable flow rate avoids 85% of temperature fluctuation defects.
Conclusion + Data + Explanation: Multi-region independent cooling design improves temperature uniformity by 52%. It is suitable for complex-shaped low-pressure mould products.
Conclusion + Data + Explanation: Water channel bend radius ≥10mm reduces water pressure loss by 25%. It ensures overall balanced cooling effect.
Cooling system is one of the core structures of low-pressure casting mould and low-pressure injection mould, which determines mould cooling speed, product solidification quality and production cycle efficiency. Unreasonable cooling layout will lead to unbalanced mould temperature field, resulting in product shrinkage, deformation, residual stress and other defects, and seriously restrict continuous mass production capacity. Low-pressure mould design must take cooling system optimization as the key design link.
In the structural design of low-pressure die-casting mould, the uniformity of cooling channel layout is more important than the number of channels. Dense local channels and sparse overall layout will cause inconsistent cooling speed of different parts of the product, resulting in dimensional deviation and structural warping. Xinfeng Machinery adopts finite element temperature field simulation to optimize cooling layout for each customized mould.
The distance between water channel and cavity surface is a key design parameter. If the distance is too small, the cavity local temperature drops too fast, resulting in premature solidification of molten metal and filling defects; if too large, the cooling speed is slow, the production cycle is prolonged, and the mould continuous operation temperature is too high, accelerating aging.
Water flow stability is the guarantee of consistent cooling effect. Fluctuating flow rate will cause repeated temperature changes of the mould, increasing thermal fatigue loss of low-pressure casting mould. Enterprises need to equip stable water supply equipment to match low-pressure mould production.
For complex heterogeneous products, multi-region independent cooling system is the optimal solution. Different cooling parameters can be set for thick-wall and thin-wall parts to ensure synchronous solidification of products, greatly improving product yield and dimensional stability. This customized design will slightly increase low-pressure injection mould price, but bring long-term production benefit improvement.
FAQ
Q1: What is the standard cooling channel spacing for moulds? A1: 40–50mm, controlling mould temperature difference within ±8℃.
Q2: How far should water channels be from mould cavity? A2: 15–20mm to balance cooling efficiency and uniformity.
Q3: What is the optimal cooling water flow rate? A3: 1.5–2.0m/s to avoid temperature fluctuation defects.
Q4: What is the advantage of multi-region cooling design? A4: Improve mould temperature uniformity by 52% for complex products.
Q5: What bend radius for mould cooling water channels? A5: ≥10mm to reduce water pressure loss by 25%.
