A plug is used in {TAIL ~ the thermoforming process} to contact the sheet and position the sheet within {HEAD ~ a die} 
A plug is used in { TAIL ~ the thermoforming process } to contact the sheet and position the sheet within { HEAD ~ a die }
OTH OTH OTH OTH OTH TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD