Blog

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...
Read more

What is Cast Polyurethane?

Cast polyurethanes are a versatile and diverse materials that have chemical resistance, ease of processing, relative low cost, abrasion resistance and chemical resistivity. Cast urethanes are inexpensive and can be made from a variety of products in a variety of industries. Cast polyurethanes are elastomers and are created by the reaction of a prepolymer which contains...
Read more

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...
Read more

Harkness February News Update

We hope your February is off to a great start. We have a few exciting updates to bring you this month, so let's get to it! First, we would like to welcome Tim Emerson to the team as our Controller. Tim brings with him experience in strategic planning, operations management, as well as financial analysis and...
Read more

The Capabilities of Custom Urethane

Urethane's unique physical properties allow it to be molded into thousands of custom parts. Because of it's abrasion resistance, high load capability, and superior dynamic properties, Urethane is the perfect material for creating custom parts. When creating sometimes intricately designed custom shapes, urethane will begin as a rod, tube, sheet or bar. This shape is...
Read more

Endless Application Opportunities

Frank & Bob at the 2014 International Association of Plastic Distribution Expo in Chicago explaining the diverse uses of polyurethane and the wide range of hardnesses available to suit a variety of environments and applications. If you would like to request a quote please contact us or use our Request...
Read more

Three Advancements That Have Driven Injection Molding Technology

Injection molding technology has made major advances in the last 25 years, from largely a world of shoot-and-ship to doing as much as possible at the press — using automation to remove parts and assemble them, two-shot molding, even assembling parts inside the mold. Now instead of a big inspection department, constantly pulling parts off the...
Read more

The Pros and Cons of Cold vs. Hot Runner Molds

Every plastic part starts in a mold.   Molds are classified into two main types, cold runner and hot runner.  Each has its advantages and disadvantages.   Your plastic injection molder will be able to give you the costs and benefits of using these different systems.  However, by understanding the key differences of these technologies, you...
Read more

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...
Read more