Custom Urethane Molding

Urethane Production Capability

Ro-Lab can bond  urethane part to a wide variety of metal sub-surfaces such as aluminum, brass, and steel. Urethane is ideal for making a block mold. Block molds have the advantage that they are quick to make and usually do not require a rigid mother mold like latex does.

Ro-Lab has the press capacity for small, high-volume production as well as production of large-scale parts:

  • 23 presses

  • 5-250 ton capacity

  • Platen sizes up to 24-inch by 24-inch

  • Oven capacities to 2,880 cubic feet (20-ft. by 12-ft. by 12-ft.)

  • Part sizes: less than 1 oz. to 500+ lbs.

  • Metered Mixing: up to 40 lbs./min.


Urethane Molding Processes

  • Urethane Compression Molding: Liquid polyurethane is poured into a mold and cured in a compression press with capacities up to 250 tons. This technique is most suitable for components that must maintain dimensional accuracy and repeatability.

    • Dimensional precision and repeatability
    • Capable of being very flexible or very rigid
    • Very durable and wear-resistant


  • Urethane Low Pressure Injection Molding: Injection of liquid polyurethane into a closed mold under low pressure, in a process ideal for projects in which a component size, component shape or tooling configuration would make compression molding impractical.

    • Ideal for unusual sizes or shapes
    • High precision and intricate parts
    • Finish is minimized


  • Open Cast Urethane Molding: The pouring of liquid polyurethane into an open mold, which is then cured in an oven or on a heated table. Usable on part sizes from less than an ounce to more than 500 lbs. Excellent for projects where conventional tooling would be expensive or impractical.

    • An economical alternative to conventional tooling
    • Low cost tooling: a mold capable of handling high pressure is not required, soft tooling may be made out of urethane or silicone
    • Suitable for smaller production runs
    • High performance product


  • RIM (Reaction Injection Molding): Reaction Injection Molding is the injection of polyols and isocyanates into a closed mold, triggering a chemical reaction that causes the material to expand and form the finished product.

    • Effective in forming extremely large products with very light weights
    • Able to improve or eliminate secondary operations
    • Eliminates sink marks
    • Workable for flexible or rigid products in foams or solids
    • Delivers reliable control of components with varying wall thicknesses



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