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Thermoforming Process

Thermoforming is the process of heating a plastic material in a sheet form to it's particular processing temperature and forming the hot flexible material against the contours of a mold by mechanical means or pneumatic means. When held to the shape of the mold and allowed to cool, the plastic retains the shape and detail of the mold. Because softening by heat and curing by removal of heat are involved, the technique is applicable only to thermoplastic materials and not thermosets.

Thermoforming Steps:

  1. Sheets are ready to be molded
  2. Zone control heating elements control plastic softness during heating
  3. Plastic Sheet is lowered over a precision designed mold
  4. Pin holes use vacuum pressure to pull the part firmly against the mold
  5. Sheets are trimed to specifications

Plastics Machine Description

2' x 2' AAA Vacuum Machine
Duel CalRod Heat Relay Control
Duel Plattens 16" Travel
1 1/2 hp Dayton Speedaire
Vacuum Pump
30 Gallon Vacuum Tank

AutoVac Vacuum Machine
35" x 53" Sheet Size
Top CalRod Heat Relay Control
3 hp Leiman Vacuum Pump
100 Gallon Tank
Custom Built Vacuum Machine
35" x 53" Sheet Size
Top and Bottom CalRod Heat Relay
2 hp Dayton SpeedAire
Vacuum Pump
75 Gallon Tank		 Custom Built Vacuum Machine
4' x 8' Sheet Size
Top and Bottom CalRod Heat
(25 zones each)
Relay Control
Duel Plattens 36" Travel
Bush 5 hp Vacuum Pump
350 Gallon Tank
Thermoforming Process

Thermoforming Process

Thermoforming Process