Manufacturer of Custom Rubber Molded Products

Custom Molding of a Three Ring Bonded Nitrile Bumper for the Aerospace Industry

When Pierce-Roberts Rubber Company was contracted by a client in the automotive industry to custom manufacture this Nitrile bumper for a Twin Otter aircraft application, we rose to the challenge. Adhering to specifications laid out in a client-supplied 3D Solidworks drawing, we designed and manufactured the necessary mold. We then manufactured three metal rings, an inner, outer, and middle ring, which were then transfer molded into the rubber. We worked with Nitrile and 4130 aircraft-quality steel, conducting several in-process and destructive tests, to ensure the middle ring was properly suspended inside the rubber. The entire process was designed to be constantly repeated while achieving the same high level of quality.

We ensured the metal was MAG particle inspected per ASTM E1444 and phosphate coated per MIL-DTL-16232, TYP 2, CL2, in accordance with our client's requirements. The final bumper measured 3.175 inches in outside diameter, 2.250 inches in inside diameter, and 1.125 inches in thickness. We held tolerances down to +/- .003 of an inch to guarantee all standards were met. Once the bumper was completed and all client expectations had been surpassed, we delivered the order to our client in Jacksonville, Florida. The project ran 7 weeks. For more information, please contact Pierce-Roberts.

Custom Molded Three Ring Bonded Nitrile Bumper
Custom Molded Three Ring Bonded Nitrile Bumper

Specifications

Product Description
  • This custom manufactured Nitrile Bumper is used within a Twin Otter Aircraft Application.
Capabilities Applied/Processes
  • Product was designed by Engineers at Pierce-Roberts
    • Mold Design
    • Insert Molding
Equipment Used to Manufacture Part
  • Transfer molding of three different inserts in one part
Overall Part Dimensions
  • 3.175" OD, 2.250" ID, 1.125" Thick
Tightest Tolerances
  • ±.003"
Material Used

  • Nitrile
  • 4130 Aircraft quality steel

In process testing performed
  • We conducted several destructive tests to ensure the middle ring was properly suspended inside the rubber.
Characteristics
  • Three Rings (Inner, Outer, Middle) Molded within
  • The Middle Ring Must be Suspended between the Inner and Outer
  • Constant Repeatability
Industry for Use
  • Aerospace
Delivery Locations
  • Jacksonville, FL
Turn Around Time
  • 7 Weeks
Standards Met

  • Customer supplied print, 3D Solidworks Drawing
  • Metal was MAG particle inspected per ASTM E1444 & phosphate coated per MIL-DTL-16232, TYP 2, CL2

Product Name
  • Molded Three Ring Bonded Nitrile Bumper