Off-Line Profilometer

An automated, non-contact measurement system to displace checking with
hand tools.

Off-Line Profilometer

Tread and sidewall extrusions can be no more precise than the dies used to make them. When a new die is cut it should be well-centered, so the Operator has the flexibility to optimize the extruder set-up. After some time in service, die wear can be uneven so that certain areas along the profile get excessive rubber flow. This is a very costly waste of raw materials. Unbalanced flow can also disrupt the symmetry of the tread - a factor that influences cured tire uniformity and balance.

The Starrett-Bytewise Profilometer was developed as an automated, non-contact measurement system to displace checking with hand tools. The Profilometer is used to verify the accuracy of newly-cut dies. Its accuracy
and speed helps reduce the number of die trials needed to approve a new die for production. Once in production, the Profilometer is used to check each run for overall quality, and to monitor for die wear.

Features and Specifications

  • The visual display overlays the measurement onto the specified design.
  • The point and gage analysis measures the thickness and width of each breakpoint.
  • The conicity analysis compares the right and left extrusion halves.
  • The regional analysis reports the area and center of gravity for each region.
  • The statistical analysis allows export of data for analysis in spreadsheet applications.
  • Experienced users report that fewer die trials are needed, conserving time and raw materials.
  • Dies can be designed to increasingly tighter tolerances for materials that are more difficult to extrude uniformly.

Resource Documents

Measurement Systems for the Tire Industry (Bulletin 2511)

PDF
1.14 MB

Starrett-Bytewise - Tire Industry Contact Info

PDF
129 KB
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