Aluminum molds continue to be used primarily for R&D, prototypes and lower volume production. However, today there are several high strength, heat treated wrought aluminum grades available with improved durability that actually make it a preferred choice for certain types of high volume production parts.
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High impact polystyrene (HIPS) is an amorphous thermoplastic made up of polystyrene and butadiene copolymer.
Most of the time, the clamp tonnage required to keep the mold closed during plastic injection is the key factor that dictates press size. Traditionally processors have attacked clamp tonnage using higher flow materials, increasing wall thickness, shortening length of flow and specifying larger gate sizes. Now there is another bullet in the holster; iMFLUX constant low pressure molding.
ABS+PC are blends of the amorphous engineering thermoplastics, acrylonitrile-butadiene-styrene (ABS) and polycarbonate (PC). ABS+PC is similar in many ways to its component resins, but combines the mechanical and thermal properties of polycarbonate with the processability and economy of ABS.
Polyethylene is the largest volume thermoplastic used today. Polyethylene is available in a variety of grades that have a wide range of properties and are classified according to density.
Glass fiber reinforced Nylon is a material often used to replace metal due to its higher strength to weight ratio. While Nylon 6 and Nylon 66 offer similar benefits there are distinct differences that should be taken into account when selecting between the two grades.