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6 Design Tips for You to Get the Desired Injection Molded Parts

Views: 50     Author: Site Editor     Publish Time: 2024-09-06      Origin: Site

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Have you thought about refining your part design to enhance quality while reducing both production costs and lead times? You can explore design strategies related to ribs and undercuts for guidance.


Ribs are essential elements in plastic injection molded parts. They serve to reinforce the structure, aid in the flow of molten plastic by acting as flow channels, and offer guidance, positioning, and support for other components within the product.



1. Ribs design should abide by the principle of uniform wall thickness.


As illustrated, the bearing cap requires manufacturing. In the initial design, clamping at point A is problematic due to the claw's insufficient length, and clamping at point B is challenging. In the optimized design, the original circular conical surface at point B is replaced with a cylindrical surface at point C for easier clamping. Alternatively, a cylindrical surface can be added at point D to facilitate clamping.

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2. Adding the bevel to the top of ribs in order to avoid trapping air.

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3. The direction of the ribs is consistent with the flow of the plastic melt.

The ribs should be aligned with the plastic melt flow direction to ensure a smooth flow, enhance injection efficiency, and prevent defects like air trapping.

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In molding, undercuts can be achieved using Parting Lines and Side-Actions, which involve more complex injection-molded geometries and significantly impact mold cost. To minimize mold expenses, it is effective to avoid undercut designs.



4. Several outside undercut can be avoided by redesign the Parting Lines.

For example, this part can be successfully demolded by redesigning the Parting Lines.

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5. Redesign part features to avoid part undercut.

Optimizing part feature design can eliminate many undercuts and avoid the need for side-actions, which helps further reduce mold costs.

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6. Redesign part features.

The part contains an undercut that would typically require side-actions for demolding. However, by redesigning the part features, side-actions can be avoided, as demonstrated by four optimized design approaches.

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