设计指南:塑料Injection Molding

Our basic guidelines for plastic injection molding include important design considerations to help improve part moldability, enhance cosmetic appearance, and reduce overall production time.

Size

Typically, Protolabs can maintain a machining tolerance of +/- 0.003 in. (0.08mm) with an included resin tolerance that can be greater than but no less than +/- 0.002 in./in. (0.002mm/mm).

材料

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Surface Finishes

Custom Color Matching & Secondary Finishing Options

Custom color matchingis offered on customer-supplied Pantone numbers and customer-supplied part samples.

Mold texturingapplies industry standard textures to a mold and you can expect the equivalent of a Mold-Tech finish.

Threaded insertsare possible through secondary heat staking and ultrasonic welding processes

Custom color matching.

Threaded holes.

Pad printingtransfers a two-dimensional image like company logos onto a three-dimensional object.

Laser engravingis applied to the mold or directly to final parts for information such as part numbers.

Basic assemblyincludes fastening molded parts together that we’ve manufactured and/or applying of labels to individually bagged parts.

Pad printing.

Part assembly.

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Draft

Adding draft angles to design, as shown on the right, helps facilitate ejection of a part from a mold, and improves overall moldability.

削弱了

削弱了, such as the one shown on the left, can complicate and, in some cases, prevent part ejection, so eliminate them if possible.

Wall Thickness

The top row represents a part designed with thick features and the resulting sink once molded. The middle row also shows a part designed with thick features, but this time the warp that occurs once molded. The bottom row demonstrates how coring out thick features helps create an optimally molded part.

Radii

Some part corners will have a radius rather than a sharp edge since we use an automated CNC milling process to make the mold for your parts. This typically does not require a change to your model, but resulting radii are identified before the mold is milled.