It’s not just about speed

Jan 20, 2015 | Page: HPW | 0 comments

Most hot-plate welder manufacturers incorporate an obsolete method of platen travel control which incorporate “stops” in the welder tooling. Melt and seal stops have been utilized for decades and curiously, continue in use today on the majority of the major plastics-joining equipment suppliers welders. It’s understandable to a degree, pneumatic or hydraulic powered platens simply can’t provide controlled and programmable feed rates with accurate melt and seal final positions without the use of stops. So, the accepted practice was…and still is with most welders, to slam parts into the heated platen tooling until the melt stops are ‘made’ – which by the way may be impossible to truly detect, retract parts from the heated tooling, remove the heated platen and then drive the parts together until the seal stops are ‘made’…you guessed it, who knows when they are truly ‘made’ or are in complete contact? We feel that this very dated approach simply has no place in a technology driven industry. The major benefits offered by servo-controlled platen motion are true process control and speed…and the elimination of those archaic and clumsy stops! With the Extol Rapid Conductor series welders the user has control comparable to other true state-of the-art plastics joining processes with programmable:

  • Platen speed and feed rates…actual velocity control
  • Force control – independent control for both press platens
  • Total dimensional control of platens
  • Hi/Low alarm limits…that really matter
“Melt and seal stops have been utilized for decades and curiously, continue in use today on the majority of the major plastics-joining equipment suppliers welders.”
Mechanical tool stop
Servo-controlled hot-plate welders eliminate the need for tool stops and provide true process control and speed.

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