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Polymer Castings take on metals
. Events. View Upcoming Events. Advertisement. Related Content. Materials fit for micromolding. Vacuum-formed plastics replace real items in film and stage sets. Injection-Molding Liquid-Crystal Polymers. High-Strength Adhesives Offer Advantages Over Mechanical Fasteners. Anaerobic Adhesives Seal
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Faster Castings From Better Photochemistry
damage to shell integrity from cooling (particularly for fused-silica shells), and processing time drops by several hours. For the first few hundred castings, Express Pattern, Vernon Hills, Ill., built QuickCast patterns from a low-viscosity liquid photopolymer, 11120 WaterShed from DSM Somos, Elgin
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Designing for investment casting
solidify or "freeze." Ideally, freezing begins at the part's extremities and proceeds backward toward the gate where liquid metal is introduced. Therefore, gates should be placed in the largest sections of parts. As molten metal freezes, it shrinks. How much it shrinks and what this does to part
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Eliminate Aluminum Casting Porosity, Shrinkage via Liquid HIPping. Manufacturing > Primary Metal Manufacturing from AllBusiness.com
Business Planning E-Commerce & Internet Finance & Accounting Home-Based Business Human Resources & Employment Management & Leadership Marketing & Advertising Operations Sales Technology Women in Business > See All. Skip over navigation. Eliminate Aluminum Casting Porosity, Shrinkage via Liquid HIPping
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A better way to cast aluminum
sections. Aluminum alloy phase diagrams are quite complicated, but for illustrative purposes, a simple two-component diagram illustrates the freezing or liquid-tosolid transformation range best suited for castings. An alloy with a composition of 88% Al and 12% silicon (Si), for example, has a short freeze
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FEA for the factory
Designers simulate manufacturing processes to get parts right the first time. A simulation predicts porosity in an aluminum-wheel casting. The black area in the top wheel shows where the metal is more solid than liquid. The gray area in the bottom wheel shows where the metal is 100% solidified
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The right finish
(Phos-E) provides ultrahigh salt-spray protection (minimum 400 hr), with protection against chipping, cracking, and abrasion. And as a black glossy finish its less costly than powder or liquid spray coatings. DESIGN TECHNIQUES. Designers must include a plating allowance in the die-casting cavity
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Magnesium parts with muscle
when AZ-91D touches dissimilar metals to form an electrical contact near an electrolyte or continuous conducting liquid path. But eliminating one of these catalysts neutralizes galvanic corrosion. Zinc is compatible with magnesium, as are some of the aluminum alloys with restricted copper content