Vacuum Degreasers and Aqueous Solutions
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Flash Removal of Plastic Injection Molded Parts

What is a good system for cleaning dirt, debris and parting line flash prior to painting?

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Q. I work in the plastic injection molding field and am looking for the best system to clean dirt, debris, and parting line flash prior to paint. I'm not against using some type of heat to remove excess flash. Any ideas? —J.R.

A. One effective means may be mass finishing, although finding the correct media will be the most important part. If your parts are reasonably sized, a vibratory deburring machine may be suitable to provide the light “deburring” you need to do on your parts. A moderate to small size deburring media such as porcelain or a plastic media (something harder than the plastic you are finishing) may be suitable to remove this flash. Additionally, the water and cleaner added to the deburring media can aid in removal of the other debris you mentioned.

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