Sep.2023 18
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What is "Recess" in mold structure

"Mold cavity recess, in essence, refers to clearances or gaps between components. For instance, the clearance between a top pin and a template is considered as mold cavity recess. The determination of mold cavity recess depends on the positional relationship between various components.

The issue of mold cavity recess has long been a source of frustration for colleagues who are new to the field of design. It is common to encounter feedback from toolpath programmers pointing out difficulties in machining due to design issues, such as insufficient cavity recess. However, these are problems related to the manufacturing process. Therefore, design personnel must take opportunities to acquire a better understanding of manufacturing knowledge. This way, the molds they design can be more user-friendly and efficient, saving both labor and time.

In this discussion, we will focus solely on the issue of cavity recess. When considering the areas where cutting tools can reach during machining, special attention must be given to how the toolpath should navigate around corners. In some cases, corners can be designed with a radius that matches the diameter of the cutting tool, typically adding one millimeter for a smooth transition during machining. In other instances, corners may need to be designed with ear-like extensions or semi-circular shapes. This is because some components that interface with these corners can only be manufactured with right angles.

Now, let's delve into the topic of cavity recess in mold design in the hope of providing some assistance in your mold design endeavors.

Nozzle positioning ring recess standards:

Nozzle Positioning Ring This component is installed on the upper fixed plate. Its purpose is to facilitate the rapid alignment of the injection machine's nozzle center with the mold's gate during mold setup. This reduces mold setup time and minimizes damage to the nozzle center of the machine."