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Urethane Casting

A reliable source for Molded Urethane information and leading Mold Urethane Companies & Suppliers.

From a molten liquid state, polyurethane may be fabricated or molded into low-density flexible foam, low-density rigid foam, soft solid elastomers (gel) and hard solid plastics. Valued primarily for its uses in rigid and flexible memory foams, polyurethane is extremely useful in solid plastic form as well. Read More…

Urethane Casting Urethane casting, technically referred to as polyurethane casting (or PU), is an elastic polymer, or elastomer, containing urethane carbamate links.
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Leading Manufacturers

Odenton, MD  |  800-394-7883

A manufacturer of custom polyurethane molding, American Urethane serves a variety of industries, including chain conveyor equipment, material-handling, power tools, computers and medical.

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American Urethane, Inc. $$$

Reno, NV  |  800-325-5463

FallLine has been a manufacturer of custom polyurethane molding products for various industries since 1981. We offer a wide range of proven materials ranging from 40A - 80D, as well as the capability to formulate materials to meet specific needs.

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FallLine Corporation $$$

Denver, PA  |  717-336-7507

From concept, to production, to delivery, we have over 40 years experience with made-to-order cast urethane & cast polyurethane elastomer products. Weaver Industries offers urethane wheels, polyurethane molding, molded urethane, urethane sheets, & urethane/polyurethane manufacturing. Skilled at custom casting, discover the advantages of our urethane sheet and Action Mallet heads.

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Weaver Industries, Inc. $$$

Marshall, MI  |  269-781-7026

Comcast Urethane is a urethane molding manufacturer of integral skin urethane foam components for use when comfort, durability and excellent aesthetics matter. Integral skin foam molded urethane is ideal for exercise equipment, fork truck pads and medical equipment.

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Comcast Urethane $$$
placeholder image American Urethane, Inc. FallLine Corporation Weaver Industries, Inc. Comcast Urethane

Although all elastomers maintain strength and versatility in many industrial applications, polyurethane elastomers possess several advantages over other elastomers and materials.

For instance, urethane casting combines many of the desirable qualities of plastic, rubber and metal with longer service life than plastics, higher impact resistance than rubber, elastic memory, noise reduction, heat and chemical resistance, and many other properties.

Polyurethane Bumpers Urethane Casting - FallLine Corporation

Additional benefits of cast urethane include: higher abrasion, cut, tear, oil, ozone and radiation resistance, lightweight, easily moldable, non-conductive, non-sparking, greater load bearing ability, broader hardness range and better colorability than rubber.

Cast urethane products include wide variety of pneumatic seals, press tool blocks, conveyor bushings, bumpers, bowling balls and parts for a broad spectrum of industries such as construction, automotive, food processing and athletic equipment.

The raw materials of polyurethane exist in a liquid state, which allows for easy mixing and measuring in preparation for molding, which may be open casting or closed casting.

Raw materials react with one another to form a pre-polymer, then during the urethane molding process, a curative is introduced to the pre-polymer in order to complete the polymeric transition. Accelerated by heat and/or pressure, the mixture is poured into a mold cavity and cured to form the final polymer.

During open urethane casting, the pre-polymer and curative are heated and mixed together, poured into an open cavity and cured without the application of pressure. During closed urethane casting processes such as injection molding, the pre-polymer and curative are heated and mixed together, then injected into the closed cavity through small holes.

An example of a type of urethane casting would be compression urethane casting, which is commonly used to make small polyurethane parts such as gears. Additionally, cast urethane serves better than regular plastic in many applications, as it has higher impact, low temperature, cold flow, radiation and abrasion resistance, better elastic memory and noise reduction capabilities, greater resilience and provides lower cost tooling.

The cost of urethane casting is on par with the cost of rubber and typical polymer molding, giving urethane an economic advantage as well.

Urethane Casting Informational Video