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

Compression Molding Guidelines for Preheat Molding of

PLENCO Single Stage & Two Stage Phenolic Molding Compounds

Parameter

Suggested Press Settings

Mold Temperatures

165° - 182°C (330° - 360°F)

Preheated Material Temperature

104° - 115°C (220° - 240°F)

Mold Close Time

3 - 8 Seconds

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 mold close time
Check for blocked vent(s)
Lower material temperature

Short Parts

Increase preform weight
Lower mold temperature

Sticking Parts

Increase mold temperature
Increase cure time

The listed parameters are suggested for use as a guide when setting up a compression molding machine for molding Plenco Thermoset materials. These parameters are for your evaluation and may or may not be compatible for all mold designs, 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