Plastics Engineering Company

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/in2) Of Projected Part Area

Additional Technical Information

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