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Detection · Manufacturing & QC

Plastic part defect detection: Datasets & Models

A computer vision workflow that inspects molded plastic parts on the production line and flags surface and structural defects. It uses object detection to localize flaws like scratches, flash, and sink marks on each part.

Plastic part defect detection example
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Plastic part defect detection

This workflow performs plastic defect detection by running object detection on images of molded plastic parts captured from line-side cameras or inspection station setups. It localizes surface and structural flaws such as scratches, cracks, flash, sink marks, and discoloration, returning bounding boxes around each detected defect for quality control review.

Try it out

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Detecting classes:

Why automate plastic part defect detection

Manual visual inspection of plastic parts is slow, inconsistent between operators, and prone to fatigue on high-throughput lines, which lets defective parts reach customers or forces over-rejection of good parts. Automating plastic defect detection with a vision model gives every part the same objective inspection at line speed, catching subtle surface and dimensional flaws that are easy to miss by eye. For manufacturing and QC teams, this means tighter defect capture, traceable inspection records, and the ability to catch process drift before scrap rates climb.

Key benefits

Consistent, round-the-clock inspection reduces escaped defects and unnecessary rework while producing a data trail for root-cause analysis. The workflow runs on cameras you likely already have on the line and scales from a single inspection cell to multiple stations without adding inspectors. Built on RF-DETR, the detection model handles cluttered part geometries and small defects, and can be retrained as new defect types or part designs appear.

How to use it

  1. Upload an image: Drop any photo into the widget above to try plastic part defect detection for free, right on this page.
  2. Preview instant results: The model detects scratch, crack, flash, sink mark, discoloration within seconds and returns an annotated image with structured predictions, so you can immediately see how well it works. Adjust the detection classes and re-run until the results fit your scenario.
  3. Like what you see?: With a free Roboflow account, you can deploy this workflow with the Serverless Cloud API, customize it in your workspace, or train RF-DETR on your own images for production accuracy.
  4. Get started for free: No code or training data required to begin: upload, review the results, and make it part of your stack in a single click.
Recommended model

Recommended model for plastic part defect detection

RF-DETR is state of the art for real-time object detection, instance segmentation, and keypoint detection, with higher accuracy and lower latency than comparable models, and it's Apache 2.0 licensed. When you're ready to build a production model for plastic part defect detection, fine-tune it on your own labeled images, then deploy to a Serverless Cloud API endpoint.

Train your own model
Roboflow Agent

Not sure where to start?

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