Considerations related to the rebuild of the forming
section and clothing application include:
Consequently, for those who make parts with sheet metal, the Forming
, Fineblanking and Stamping (FFS) technology developed by Feintool System Parts ought to be of particular interest.
Before we leave "older" forming
techniques, it's worth noting that there is still development work continuing in cylinder forming
Features: Servo-driven with digital indexing; capable of 100 psi pressure forming
; PC-controlled oven zones.
Plant Location: Selestat, France (Forming
Fabrics & Engineered Fabrics)
The platen maintains constant pressure, resulting in consistent forming
shot-to shot and run-to run, says Schrieffer.
While vacuum forming
used only atmospheric pressure (14.7 psi) to force molten sheet into the contours of the mold, pressure forming
used compressed air (20 to 50 psi) to do the same.
Corrugator vacuum forming
of discrete parts is known to be practiced by only a few dozen processors globally.
Applications: Heavy-gauge forming
, including Class-A and TPO parts
Among other thin-gauge packaging exhibits to appear at NPE, Canada's GN Plastics plans to demonstrate what it calls "dual-mold forming
." This patented system employs two molds that alternately swing back and forth between forming
and parts-removal stations, creating a system that gets the productivity benefits of two molds while requiring just one trim station.
the 40% scrap rate typical for roll-fed sheet forming
. The process bears some similarities to a "scrapless" forming
method developed decades ago by Dow Plastics, in which barrier sheet is punched into squares that are impact-formed and then drawn into molds.
Features: Very high-speed (40+ cycles/min) pressure forming