10 Other Design Guidelines For Injection Molding

When designing for injection molding, there are even more guidelines to consider. The easier it is for toolmakers to create your mold, the faster your turnaround time, which will increase the speed with which your product will be available to consumers. Here are 10 other design guidelines to follow when designing for manufacturing:

  1. Consult your manufacturer about solid mounting characteristics or device location. Experience counts in this area and you want to be a tough man. Threaded components can often be replaced by simple male-female connectors. Simplicity, like everything else, is the key here.
  2. Avoid small holes. Small holes may be too complex to mold well. This will also increase the risk of breakage of the tool. Both will increase your costs.
  • If you make a hole in your injection mold, the through-holes are preferable. This will allow the mold to separate more efficiently and ensure a uniform hole diameter.
  • If there is a difference in angle or surface consistency. It will depend on the material used. Whether or not, the variance is not perceptible to the human eye. However, if your design requires an exact surface or angle, specify a material that will hold its shape, such as low carbon hot rolled steel.
  • Flatness must be applied both per unit and with a reasonable overall shape tolerance. This will avoid sudden surface variations or the characters in a relatively small area.
Injection mold
Injection mold
  • Dimensional tolerance. Shift the machining tool to allow dimensional tolerance. The “milling compensation” takes into account the size of the tool itself in the tooling of the mold.
  • Consider stack tolerance for related parts. When creating connection parts, consider the separate tolerances on the male and female connectors. If the tolerances are considered unrelated to one of them, the parts may not mate, resulting in costly changes.
  • When a design requires a particular orientation, provide a design element to make it clear. If you are unable to design your room with clear instructions and incorporated into its design, you must consider a new design.
  • Use uniform screw sizes if possible. Think of the end-user in your design process. The use of uniform screw sizes and “standard” components will make your design much more accessible to more people.
  1. Keep your coins. Each additional component of your design multiplies the risk of error. In addition to keeping the design or your piece simple, it’s important to keep the design as a whole as simple as possible. The solution is to create a design that optimizes the injection molding process.

Plastic injection molding is an effective tool for creating consistent and well-designed parts for your design. However, you must make it work for you. The easier you do for toolmakers, the sooner you will see a return of your design.