​Cooling Line Positioning

Location of the cooling lines is critical to achieving efficient cooling of the part and improving part productivity. Fig. 5. 16 illustrates guidelines for an optimum layout of cooling channels. One point to keep in mind is that the cooling channel diameter should be large enough to have reasonably low pressure drop but not so large that excessive flow rate is needed to obtain maximum cooling efficiency

via turbulent flow. The guidelines to follow for determining a proper cooling line layout are：

(1) Keep the cooling lines at a uniform distance from the workpiece walls. Otherwise, cooling will not be consistent across the object.

( 2）Distribute cooling to match the amount of heat in various sections of a workpiece. For example, a nonuniform thick area needs more intensive cooling than a thin area.

( 3）Avoid a metal-to-metal interface between cooling channels and the mold surface. Install channels directly in cores and cavities, not into the back plates alone.

(4) Limit hoses for cooling lines and fitting restrictions. The inside diameter should be at least the size of the cooling channel inside diameters.

(5）To avoid losing heat to ambient temperature surroundings, insulation should be used on all pipes and lines.

（6）Avoid more than 10 bends in any cooling line circuit, to minimize the pressure drop.