PLASTICS ENGINEERING COMPANY SHEBOYGAN, WISCONSIN 53082-0758 U.S.A.

3518 LAKESHORE ROAD POST OFFICE BOX 758 PHONE 920-458-2121 FAX 920-458-1923

Transfer Molding Guidelines
PLENCO Granular Polyester Molding Compound

Parameter	Suggested Press Settings
Mold Temperatures	163° - 182°C (325° - 360°F)
Preheated Material Temperature	93° - 100°C (200° - 212°F)
Transfer Time	3 - 6 Seconds
Transfer Pressure	5.5 - 6.9 MPa (800 - 1000 psi)
Clamp Tonnage	27.6 - 41.4 MPa (2 - 3 Tons/in^2) Of Projected Part Area

Additional Technical Information

• To transfer mold PLENCO granular polyester materials, we suggest using a screw preplasticizer for preheating rather than preforms because this material is difficult to preform.
• A clean, highly polished, chrome plated mold is recommended. Use a mold release such as Carnauba Wax, being careful to coat the entire the surface including the transfer pot. After several shots wipe off the excessive mold release, using a clean, soft cloth.

Common Molding Problems	Potential Solutions
Blistering	Increase mold temperature Increase material temperature Increase cure time
Gas Burns	Slow transfer time Check for blocked vent(s) Lower material temperature
Short Parts	Increase preform weight Lower mold temperature Lower material temperature
Sticking Parts	Increase mold temperature Increase cure time

The listed parameters are suggested for use as a guide when setting up a transfer molding machine for molding Plenco Thermoset materials. These parameters are for your evaluation and may or may not be compatible for all mold designs, runner systems, press configurations, and material rheology. Please feel free to call Plenco and a Plenco Technical Service Representative will be happy to assist you.
Revised 10-9-01