Case Study 4
Part name: Phenolic insulator
Material: Grade CE garolyte natural phenolic
To produce a small part with a relatively large thickness (for its length
and width), with holes with depth-to-diameter ratios of more than one,
in a very brittle plastic material.
To prevent cracking, the strips were heated to approximately 150 degrees F just prior to entering the die. In-process QC measurements had to allow for thermal expansion of the phenolic material. The temperature was closely monitored to avoid damage to the matrix of the material, which could have resulted in embrittlement.