Screw and cylinder regeneration

Groche Technik carries out the following repair work in screw conveyor regeneration:

  • Screw conveyor cleaning and crack inspection
  • Pre-grinding screw conveyors
  • Screw conveyor PTA welding, application of buffer layer if necessary
  • Alignment
  • Flank grinding
  • Core band grinding and polishing
  • Cylindrical grinding to finished size
  • Nitrating
  • Concentricity check
  • Leak test on screw conveyors with internal cooling
  • Final inspection with measurement record
  • The processing parameters

Screw regeneration in worn areas
See above.
Renewal of the screw drives
1. The drive is completely removed, a
new drive part is screwed on and
welded. The drive contour is smoothly
reproduced.
2. The drive is ablated in diameter
and a sleeve is shrunk on and welded.
The drive contour is smoothly
reproduced.
Cylinder regeneration with partial renewal
The cylinder is separated in the filling
area and a new bimetal pipe is smoothly
screwed on and welded. The bore
hole is honed off from the backside to
produce the cleanest possible drill hole
transition.
Cylinder regeneration by bushing in the metering zone
The cylinder is bored out deeply
with 5x diameter and a pipe with the
original diameter is shrunk in. The
bore hole is honed from the backside
to produce the cleanest possible bore
hole transition.
Not recommended for light coloured
plastics or frequent colour changes.