Technical Help

Rubber used in packing has begun to vulcanise

Use new rubber

Mould under packed

Use sufficient rubber. Close platens down so they are in contact with the mould frame

Mould over packed

Tighten vulcaniser ½ turn past first resistance. Repeat every two minutes until platens are in contact with frame and handle cannot be turned without resistance. Allow 15 minutes at 155°C

Model not filled in with rubber

Pack rubber piece into and around model

Mould not cured for recommend time

Tighten vulcaniser ½ turn past first resistance. Repeat every two minutes until platens are in contact with frame and handle cannot be turned without resistance. Allow 15 minutes at 155°C for every 6 mm. For intricate mould all 20 minutes at 145°C for every 6 mm.

Platen not at curing temperature

Preheat vulcaniser to 155°C for 10-15 minutes

Surface of strips not clean

Use new strips. Do not contaminate surface with hands and protect from eatraneous dirt or dust

Rubber is old

Use new rubber

Mould not cured long enough

Use correct times and temperatures