1. The influence of cooling water channel layout on heat transfer efficiency
The layout of the cooling water channel is directly related to the heat transfer efficiency of the mold. Proper layout ensures that heat is transferred evenly and quickly from the plastic melt. For example, using a spiral cooling water channel design, the cooling water spirals up or down in the pipe, which increases the contact area and contact time with the mold wall, making the heat exchange more complete. In contrast, a simple linear water channel may lead to uneven local cooling. Areas close to the water channel are cooled quickly, while areas far away from the water channel are cooled slowly, affecting the forming quality and efficiency of the pipe. In addition, designing the cooling water channel into a contour that matches the shape of the pipe, such as a circular water channel surrounding the circular pipe mold cavity, can further improve the uniformity of heat transfer and reduce stress concentration and deformation caused by temperature differences. Thereby speeding up the molding cycle.
2. The relationship between cooling water channel layout and molding cycle
The optimized cooling water channel layout can significantly shorten the pipe forming cycle. When the cooling water channel can efficiently remove heat, the plastic melt can be cooled and solidified from the molten state to a demoulding temperature more quickly. For example, in a large plastic pipe mold, if the cooling water channels are properly laid out so that the temperature of each part of the mold drops evenly, the cooling time that originally takes 10 minutes may be shortened to 6-7 minutes. This not only improves production efficiency, but also reduces production costs. By analyzing different cooling water channel layouts through simulation software, the cooling time and temperature distribution under various layouts can be predicted to select the best solution. At the same time, a reasonable water channel layout can also reduce the adjustment time required due to over-cooling or insufficient cooling, making the entire production process smoother and more efficient.
3. The effect of cooling water channel layout on pipe quality
The layout of cooling water channels has a vital impact on the quality of pipes. Uniform cooling ensures pipe wall thickness uniformity and dimensional stability. If the cooling is uneven, the pipe will have shrinkage differences during the cooling process, resulting in inconsistent wall thickness. In severe cases, problems such as excessive ovality may even occur. For example, in a multi-cavity plastic pipe mold, if the cooling water channel design of a certain cavity is unreasonable, the wall thickness of the pipe produced by this cavity may be larger than that of other cavities. In addition, appropriate cooling water channel layout can help reduce the internal stress of the pipe and improve its mechanical properties. Because rapid and uniform cooling can make the plastic molecules more orderly in the solidification process, avoiding cracks or reducing the strength and toughness of the pipe due to local stress concentration.
4. Innovative cooling water channel layout and technological development
With the continuous advancement of science and technology, innovative cooling water channel layouts and related technologies continue to emerge. For example, conformal cooling water channel technology is used, and advanced manufacturing methods such as 3D printing are used to create cooling water channels that completely fit the shape of the mold cavity, greatly improving cooling efficiency and uniformity. Some molds also adopt zone cooling control technology, which can independently adjust the water flow rate and temperature of the cooling water channel according to the cooling needs of different parts of the pipe to achieve precise cooling. The application of these innovative technologies provides broad development space for further improving the cooling effect of plastic pipe mold, improving pipe forming efficiency and quality, and promotes the technological upgrading of the plastic pipe manufacturing industry.
