Jun 16, 2015 #1 ChiefEHank Industrial Joined Jun 16, 2015 Messages 1 Location US 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 Joined Dec 22, 2003 Messages 8,504 Location US 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 Joined Apr 15, 2002 Messages 5,192 Location US Any chance the jar's contents are in the threads and causing problems? Upvote 0 Downvote
Jun 17, 2015 #4 Compositepro Chemical Joined Oct 22, 2003 Messages 7,841 Location US 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.