Cooling Loop – Your Secret Weapon to Create Cooling Channels

If you are a mold designer working on the injection mold, you must understand the importance of designing a reasonable cooling system, which greatly affects production efficiency since cooling takes most of the mold cycle time. Download and try ZW3D

However, cooling system design can be difficult because it’s at the end of the mold design process, before which, designers need to design the cavities, slides, etc. So when it comes to cooling system design, there will be many “obstacles” in the plate.

What makes it even harder is that the design of cooling loops (also called a cooling channel) is tedious.

Usually, you need to go through at least 4 steps.

Mold tool cooling loop shown as a cut

Step 1: Create a sketch or a 3D sketch for the cooling route

Mold tool cooling loop shown as a schematic

Figure 1. The sketch of the cooling route

Step 2: Along the route, use Swept Rod to create the basic shape of the loops.

Mold tool cooling loop shown as a solid model

Figure 2. Create the shape of cooling loops by Swept Rod

Step 3: Use Cut command to hollow out the cooling loops on the plate of the core/cavity based on the shape of the rods.

Cutting Mold tool cooling loops

Figure 3. Hollow out the cooling loops with Cut command

Steps 4: Finally, add other cooling components, for example, joints.

Creation of joints in Mold tool cooling loop

Figure 4. Add joints to the end of the cooling loops

So, to finish cooling loops design, you may use commands such as 3D Sketch, Swept Rod, Cut, General (to insert general standard parts), etc. Quite tedious, right? But, the headaches haven’t ended yet. Design changes are inevitable during design process. If you need to change the route or diameters of the loop, it brings more troubles to you.

Row of icons showing design steps

Figure 5. The tools used to create a cooling loop in the traditional way

In ZW3D 2020, cooling loops can be created with one command

Cooling Loop. You can easily create two types of cooling loop — Single object or Two objects. Unlike the traditional method, you can directly generate the channels by continuously picking points at the locations you want, so you skip the steps like drawing sketches and creating pockets on the plate.

Automatic creation of cooling loops in Mold tools

Figure 6. Cooling loop types: Single object and Two objects

What’s more, you can preview the position of the cooling loops dynamically during the creation process, to prevent intersecting with other components in the plates.

Mold tool dynamic preview of assembly

Figure 7. Create cooling channels with dynamic preview

After creating the loops, you can insert other cooling components like joints, plugs and oil rings by Cooling Parts. It allows you to choose the supplier and the type of parts, and to input or adjust parameters like diameter, thread size and safe distance under dynamic preview.

Mold tool cooling loops with additional parts

Figure 8. Insert cooling components based your needs by using Cooling Parts

Just by several clicks, the cooling system design is done. The tricky task becomes an easy job.

How about modifying the cooling loop? First, select “Cooling” in Part menu, then right-click the relevant step in the history tree, and you can easily redefine the position and the size of the cooling loops, and also adjust the parameters of other components as introduced just now.

Mold tool cooling loops being redefined

Figure 8. Insert cooling components based your needs by using Cooling Parts

So far, I have shared all the tricks about cooling loop design in ZW3D 2020, which can greatly simplify your workflow. Instead of taking so much time to calculate the route or the position of the cooling loop, you can create one in a more flexible way.

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