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6 06, 2019

Residual Stress

By |2019-05-31T14:20:21+08:00June 6th, 2019|Categories: China mold supplier, molded plastic parts, molds, Residual Stress|Tags: , , |Comments Off on Residual Stress

A culprit in shrinkage and warpage problems

Residual stress is process-induced stress, frozen in molded plastic parts. It can be either flow-induced or thermal-induced. Residual stresses affect a part similarly to externally applied stresses. If they are strong enough to overcome the structural integrity of the part, the part will warp upon ejection, or later crack, when external service load is applied. Residual stresses are the main cause of part shrinkage and warpage. The process conditions and design elements that reduce shear stress during cavity filling will help to reduce flow-induced residual stress. Likewise, those that promote sufficient packing and uniform mold cooling will reduce thermal-induced residual stress. For fibre-filled materials, those process conditions that […]

1 06, 2019

Plastic mold manufacturers

By |2019-05-31T11:11:59+08:00June 1st, 2019|Categories: molds, Plastic mold manufacturers|Tags: , , , |Comments Off on Plastic mold manufacturers

Make Plastic Mold by Plastic mold manufacturers

Associations representing thousands of tool and die, and industrial plastic mold manufacturers throughout the United States have welcomed the release of a fact-finding study that assesses the increasingly difficult state of America’s tooling industries. The study, Tools, Dies, and Industrial Molds: Competitive Conditions in the United States and Selected Foreign Markets, was conducted by the United States International Trade Commission (ITC) at the request of the US Congress’s House Committee on Ways and Means.

Spokespersons for the National Tooling and Machining Association (NTMA), the American Mold Builders Association, the Tooling and Manufacturing Association (TMA), the Tool and Die Summit from Northwest Pennsylvania, the Coalition for the Advancement of Michigan Tooling Industries, and […]