Can You Make a Mold in SolidWorks?

Can You Make a Mold in SolidWorks?

If you are a designer or engineer working with SolidWorks, you may be wondering if it is possible to create molds directly within the software. The good news is that SolidWorks offers powerful tools and features that enable you to design and create molds for various applications. In this article, we will explore the process of making a mold in SolidWorks and discuss the steps involved.

The Basics of Mold Design

Before diving into the specifics of using SolidWorks for mold design, let’s first understand what molds are and their importance in manufacturing processes. Simply put, a mold is a hollow container used to shape molten material such as plastic or metal into a desired form. Molds play a crucial role in mass production by allowing manufacturers to replicate complex shapes with precision and efficiency.

Mold design involves several considerations, including the part geometry, material properties, draft angles, cooling channels, and ejection mechanisms. With SolidWorks, you can easily address these aspects while designing your mold.

Creating the Mold Cavity

One of the primary steps in mold design is creating the mold cavity, which is essentially the negative space that defines the shape of the final product. To do this in SolidWorks:

  1. Create a new part: Start by creating a new part file in SolidWorks.
  2. Create base geometry: Use sketching tools like lines, arcs, and splines to create the base geometry of your mold cavity. Ensure that your sketch fully defines the desired shape.
  3. Add thickness: Extrude your sketch to add material thickness to your mold cavity.

    The thickness will depend on factors such as material shrinkage and structural requirements.

  4. Add draft angles: Apply draft angles to the walls of your mold cavity to facilitate easy ejection of the final product. Draft angles ensure that the part can be smoothly removed from the mold without getting stuck.

Designing Mold Components

In addition to the mold cavity, a complete mold assembly consists of several other components, including the core, inserts, cooling channels, and ejector pins. SolidWorks provides a range of tools to design these components efficiently.

The Core and Inserts

The core is responsible for creating internal features in your molded part. Similarly, inserts are used to add specific features or details that cannot be achieved through the base cavity alone. To create the core and inserts:

  1. Create sketches: Use sketches and appropriate sketching tools to define the shape of your core and inserts.
  2. Create features: Extrude or revolve your sketches to create solid bodies representing the core and inserts.
  3. Add draft angles: Apply draft angles to the core and inserts as necessary for easy ejection.

Cooling Channels

Cooling channels are essential for controlling and maintaining uniform temperature during the molding process. SolidWorks enables you to design cooling channels within your mold assembly using specialized features such as helixes or swept cuts.

Ejector Pins

Ejector pins are used to push or eject the molded part out of the mold once it has solidified. SolidWorks allows you to add ejector pin holes or cutouts in appropriate locations within your mold design.

Validating Your Mold Design

Designing a mold in SolidWorks is not just about creating the geometry; it is also crucial to ensure that the design will function as intended. SolidWorks offers powerful simulation capabilities that allow you to validate your mold design before moving on to manufacturing.

Using SolidWorks Simulation, you can perform analyses such as mold filling simulations, cooling analysis, and part warpage prediction. These simulations help you identify potential issues and optimize your design for better performance and manufacturability.


SolidWorks provides a comprehensive set of tools and features that enable designers and engineers to create molds with precision and efficiency. By following the steps outlined in this article, you can confidently design molds for a variety of applications and ensure successful manufacturing processes.

Remember to leverage SolidWorks’ simulation capabilities to validate your design and make necessary improvements. Happy molding!