Category Archives: Uncategorized

Custom Project? Go Urethane!

Ready to get started on you next project? Urethane is an amazing choice for your next custom mold project.

What exactly makes Urethane such a great choice? It's physical properties allow it to be the ultimate "tough guy" when it comes to molding materials. Urethane possesses:

  • Outstanding Abrasion Resistance
  • Excellent Cut...
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The Injection Molding Process

INJ Whether your an existing customer or just a curious George, you might be wondering "what exactly does the process of injection molding entail?" We have broken it down for you step by step so that you can understand exactly what happens during this process. An injection molding machine...
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What is the Process of Plastic Extrusion?

EXTRUSION plays a prominent part on the plastics industry. Extrusion, unlike moulding, is a continuous process, and can be adapted to produce a wide variety of finished or semi-finished products, including profile, sheet, film, covered wire and pipe. The process of plastic extrusion begins with the placement of raw resin into the extruder’s hopper. If the...
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What is Profile Extrusion?

  Harkness Industries produces several resins suitable for profile extrusion. The extrusion process for profiles is similar to sheet extrusion. The resin is fed into an extruder which melts the material and forces it through a die that gives it the desired shape. Additional processing is necessary to give the extruded profile its final contours. Profiles may...
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The Harkness Standard For Urethane Shapes

Harkness Industries’ cast urethane shapes (sheet, tube, rod and bar) are well known for their extraordinary toughness, durability, and consistent quality. Our MP Series product line will improve service life by 10 to 20 times versus that of conventional rubbers and plastics. In the toughest abrasion environments, urethanes will outlast hardened steel by...
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A Guide To Machining Polyeurethane

Cast polyurethane can be readily turned, sawed, drilled, ground or milled. These and other secondary operations present many similarities to the machining of metal, but there are also some important differences. This following information is intended to provide some general guidelines for machining urethanes. See Also: The advantages of injection molding It is important to note that the material...
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