Most injection moulds are made from cooling channels

Update:07 Jul 2018

When using plastic injection moulding (PIM), it is impo […]

When using plastic injection moulding (PIM), it is important to control heat. Most injection moulds are made from cooling channels that are drilled or milled from a steel block.

Cold water flows through these channels to cool the core and draw heat away from the plastic. Traditionally, these paths have been made by drilling straight holes. However, since the channel can only follow a straight line of sight path, the effectiveness of the method is limited when forming complex shapes.

The practice of conformal cooling overcomes this limitation. With conformal cooling, the channels can be designed to evenly follow the shape of the part, so they "fit" any shape for optimum efficiency and faster cycle times.

How 3D printing is used for conformal cooling. Determining the best way to evaluate the cooling efficiency of 3D printing, 3D printing technology requires a longer time to create a conformal cooling channel than conventional methods, but it can compensate for costs by reducing cycle time and improving product quality. Mass production costs. The conformal cooling channels are designed to fit snugly against the contour of the part while maintaining proximity to the inner wall of the tool for increased efficiency.

After printing, the part still has a rough surface texture, which is produced when the part is built layer by layer using the 3D printing method. The insert was later CNC machined and polished to achieve high gloss. Although the total amount of coolant required for the new insert is roughly the same as the original insert using a straight channel, the channel of the new 3D print insert more closely follows the taper of the tool and has a larger exposed surface area.