THE TAMING OF THE SCREW
- Manufacturing of complex-shaped ceramic components by micropowder injection molding. Piotter, V.; Mueller, T.; Plewa, K.; Prokop, J.; Ritzhaupt-Kleissl, H.-J.; Hausselt, J. // International Journal of Advanced Manufacturing Technology;Apr2010, Vol. 46 Issue 1-4, p131
The micropowder injection molding process (microPIM) offers a large-scale fabrication technology for metal/ceramic microstructures. Current R + D efforts focus on increasing the degree of complexity of the 3D microparts molded rendering it necessary to implement novel tools and demolding...
- New Screw Design for Long-Glass Microcellular Foam Molding. Knights, Mikell // Plastics Technology;Jul2007, Vol. 53 Issue 7, p60
The article provides information on the new screw design developed by Trexel Inc. for long-glass microcellular foam molding. According to the author, a combination of microcellular foam molding and long-glass fibers provides new potential for injection molding to penetrate large structural...
- Designing plastic snap-fits. Crangulescu, Nicolae; Raymond, Martha K. // Machine Design;2/6/97, Vol. 69 Issue 3, p86
Focuses on the facilitation of plastic injection-molded parts assembly by replacing fasteners with integral snap-fits. Considerations in calculating snap-fit stiffness; Use of closed-form equations based on Beam's theory.
- Eliminate Blemishes on Cosmetic Parts. Bozzelli, John // Plastics Technology;Nov2005, Vol. 51 Issue 11, p49
Offers advice on eliminating blemishes on cosmetic injection molded parts. Possible causes of specks; Factors to consider in starting a new resin or restocking an existing material; Disadvantages of general-purpose screws and dispersive-mixing designs.
- Working with Color Concentrates. Sepe, Mike // Plastics Technology;Apr2012, Vol. 58 Issue 4, p25
The article discusses the general-purpose screw commonly used by the injection molding industry. A brief historical overview of improving melt uniformity is presented. The author concludes that the screw, which is still being integrated to most molding machines, does a poor job of creating a...
- TECHNOLOGY SHOWCASE. // Canadian Plastics;Aug2004, Vol. 62 Issue 8, p24
Evaluates several products for the plastics industry, available in the Canadian market in August 2004. Titan injection molding series from Demag Plastics Group; Screw additive feeders from Sterling Material Processing; Twin-lever gate from Diamond America Corp.
- Get a Grip on Screw Slippage. Guyer, Ralph // Plastics Technology;Dec2008, Vol. 54 Issue 12, p38
The article investigates the causes of screw slippages in injection moldings. It explains that screw slippage happens when the screw in the barrel of an injection machine does not function properly or during plastication. It illustrates how to tell if a screw slippage is occurring and how to...
- Getting A Reaction. Roderick, John A. // Product Design & Development;Sep2000, Vol. 55 Issue 9, p24
Deals with reaction-injection molding (RIM) process. Integration of several technologies in a single material in order to combine their desirable properties; Processing benefits of RIM in electrostatic discharge applications; Challenge for manufacturers of automotive fascia.
- ITW Medical purchases Tenn. molder. Esposito, Frank // Plastics News;10/15/2012, Vol. 24 Issue 31, p0001
The article discusses Illinois Tool Works Inc. (ITW) and its ITW Medical Products unit's purchase of disposable medical products injection molding company Coeur Holding Co. (CHC) as of October 2012. It states that CHC will be combined with the custom insert molded filtration division ITW...