Plastic Injection Molding Articles by Bob Hatch

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The Troubleshooter, Part 100!: If he's told you once, he's told you 100 times	Pin Gate Frustration
Living Hinges Can Be Molded Out of Polystyrene	Thin-Wall Warpage
Flattening the Warp	The Many Causes of Sink
Eliminating Cracking and Crazing	Sizing For a Heated Sprue
Softer Materials Like Polyethylene Terephthalate Can be Harder to Mold	A Poor Way To Fill 32 Cavities
Watch the Subgates & the Venting in Nylon 6, Polyethylene & Polypropylene	Get The Gate Design Right
Making Yellow Windows Appear Clear in Polyurethane	Big Parts Are Not Difficult To Mold
A Poor Flow Path: Crystalline and Amorphous Plastic Materials	Gates and Amorphous Materials
Common Processing Problems (mp3 audio download)	Gate Defects Are Almost Always Design Related
Nylon Polyamide 6: nylon problems	Gate-Related Defects
Weak Plastic Coat Racks	Hot Runners and Living Hinges
Testy Plastic Tubes	Ejector Pin Gates are Sometimes Misunderstood
Smaller Parts and Runners Have the Same Needs as Large Ones	Gate Location Does Make a Difference
Basics of Tab Gates	Flow marks tell on moldmaker
What Causes Parts To Warp?	What caused the blush?
What made the part crack	Does acetal cycle slower?
A restricted flow mystery	A Troublesome family mold
	Source: Injection Molding Magazine

Bob Hatch is one of the leading on-the-spot problem solvers in the molding industry. Mr. Hatch spent time as the technical programs manager at Channel Prime Alliance and managed a molding operation for more than 25 years and writes columns on injection molding troubleshooting for Injection Molding Magazine.

Bob Hatch
1803 Hull Avenue
Des Moines, Iowa 50313-4738
Phone: 515-326-2598
Email: bob.hatchthetroubleshooter@gmail.com
Website: www.bobhatchonline.com