Jun 16, 2015 #1 ChiefEHank Industrial Jun 16, 2015 1 Does anyone have any knowledge or insight why threads on HDPE jars would gall when PP lids are being torqued down? http://files.engineering.com/getfile.aspx?folder=50a8078d-23d5-4d56-8e99-a760bbf69e2b&file=20150615_161657.jpg
Does anyone have any knowledge or insight why threads on HDPE jars would gall when PP lids are being torqued down?
Jun 16, 2015 #2 MacGyverS2000 Electrical Dec 22, 2003 8,504 Maybe a dumb question, but are you sure the threads match? If the two materials shrink at different rates when cooled after molding, the thread mating could be off from the design... Dan - Owner http://www.Hi-TecDesigns.com Upvote 0 Downvote
Maybe a dumb question, but are you sure the threads match? If the two materials shrink at different rates when cooled after molding, the thread mating could be off from the design... Dan - Owner http://www.Hi-TecDesigns.com
Jun 16, 2015 #3 CoryPad Materials Apr 15, 2002 5,192 Any chance the jar's contents are in the threads and causing problems? Upvote 0 Downvote
Jun 17, 2015 #4 Compositepro Chemical Oct 22, 2003 7,822 If the powder in the jars contains large particles with sharp edges, these particles will embed into one surface and then scrape the other surface. Upvote 0 Downvote
If the powder in the jars contains large particles with sharp edges, these particles will embed into one surface and then scrape the other surface.
