Based on your previous focus on high-temperature sealing and low-volatile pollution control in hot runner systems, interference from the proximity of cooling channels refers to a series of cooling anomalies caused by improper channel layout. Key points are as follows:
1. Core Interference Manifestations
Narrow Channel Spacing: When the distance between two cooling channels is less than 3d, mutual interference between water flows occurs, resulting in turbulent cooling water flow and an inability to form stable turbulence, significantly reducing heat exchange efficiency.
Channels Too Close to the Cavity: A distance of less than 10mm easily leads to uneven temperature distribution on the mold surface, causing localized sudden cooling, resulting in warping and deformation of the plastic part, and may also cause localized stress cracking of the mold core.
Improper Layout of Adjacent Hot Runner Areas: When cooling channels are too close to the heating elements in the hot runner system, excessive heat is carried away, disrupting the temperature uniformity of the hot runner system and causing localized solidification and blockage of the plastic material.
2. Standardized Avoidance Requirements According to the mold water channel design standards, the spacing between cooling channels should be controlled between 3d and 5d, the distance from the edge of the channel to the product should be maintained at 10 to 20 mm, and the spacing between adjacent nozzle water channels should be at least 25 mm to avoid neighboring interference, while ensuring the independent and stable temperature of the hot runner and the cooling system.
