Guides

General overview

Guiding system scope is to minimize Fabric oscillation with a controlled movement of a roll called guide roll.

Keeping constant Fabric position means:

  • Avoid Fabric run-out
  • Reduce edge wear
  • Increase Fabric life
  • Optimize machine productivity
Guiding system is designed to keep Fabric running in the center of the roll which it travel. Moving one end of the guide roll in the proper direction corrects the Fabric run, guiding is based upon the principle that the fabric will always leave the guide roll perpendicular to its rotational axis, in this manner the Fabric will always travel toward the end of the roll it encounters first.

Weingrill offers different Guiding system models actuated by air rides or pneumatic cylinders.

PARALLELOGRAM GUIDES, with linear movement. PIVOTING GUIDES, with pivoted movement. LINEAR GUIDES, where guide roll edge has a linear movement. VERTICAL GUIDES, for vertical Fabric run application.


CONTROL AND ALARM

Fabric control and guide activation are done through a palm valve (PRESSURE BALANCE VALVE or PROPORTIONAL BLEED VALVE) where a paddle feels the fabric edge position. The valve controls the air flow to the air rides.

The security of the guiding system is increased using the ALARM PALM, where electric sensors alarm the operator when excessive fabric run-out occurs.


PARALLELOGRAM GUIDE W-GP

  • Compact and reliable assembly.
  • Low and simple maintenance.
  • Cost effective.
  • Roll support linear displacement.
  • Execution in Stainless Steel or painted mild steel.
  • Horizontal or inclined mounting design.
  • Easy maintenance.
  • Options:
    - Models in Stainless Steel and air rides are designed for Wet and aggressive environments.
    - Models in Steel and pneumatic cylinders are designed for high temperature environments.
  • Accessories:
    - System for manual positioning.
    - Roll support bearing housings.
    - Pressure balance palm valve.
    - Proportional bleed palm valve.
    - Alarm palm.

PIVOTING GUIDE W-GO

  • Compact and reliable assembly.
  • Low and simple maintenance.
  • Cost effective.
  • Roll support pivoting displacement.
  • Execution in Stainless Steel.
  • Horizontal, vertical, inclined or reversed mounting design.
  • Stroke limited with mechanical stops.
  • Easy maintenance.
  • Options:
    - Models in Stainless Steel and air rides are designed for Wet and aggressive environments.
    - Models in Steel and pneumatic cylinders are designed for high temperature environments.
  • Accessori:
    - System for manual positioning.
    - Roll support bearing housings.
    - Pressure balance palm valve.
    - Proportional bleed palm valve.
    - Alarm palm.

LINEAR GUID W-GL

  • Compact and reliable assembly.
  • Low maintenance.
  • Roll support linear displacement.
  • Manual positioning device.
  • Stainless Steel or painted cast iron execution.
  • Three sizes for different applications.
  • Base support suitable for doctor installation.
  • Models with or without manual positioning.
  • Air rides can be easily replaced without dismantling guide or roll support.
  • Options:
    - Execution for high temperature applications.
  • Accessori:
    - System for manual positioning.
    - Roll support bearing housings.
    - Pressure balance palm valve.
    - Proportional bleed palm valve.
    - Alarm palm.

VERTICAL GUIDE W-GV

  • Compact and reliable assembly.
  • Low and simple maintenance.
  • Cost effective.
  • Roll support linear displacement.
  • Execution in Stainless Steel or painted mild steel.
  • Press felt application.
  • Two sizes for different applications.
  • Vertical or inclined mounting design.
  • Easy maintenance.
  • Options:
    - Execution for high temperature applications.
  • Accessori:
    - System for manual positioning.
    - Roll support bearing housings.
    - Pressure balance palm valve.
    - Proportional bleed palm valve.
    - Alarm palm.

PRESSURE BALANCE PALM VALVE W-PALM

  • Pneumatic valve.
  • Double or single inlet.
  • Reduced and adjustable contact pressure.
  • Reduced hysteresis to compensate uneven edges.
  • Low air consumption.
  • Easy to operate.
  • Low maintenance.
  • Valve alternatively add or bleed air to and from the Fabric guide.
  • Four ways control device.
  • With stable Fabric the valve is Normally Closed (NC), consequence is no air consumption.
  • Interchangeable sliding insert in ceramic.
  • Max operating temperature: 140 °C.
  • Max air pressure: 0.5 MPa.
  • When unbalance conditions occours the double inlet allows different actions on the air rides of wire/felt guide.
  • 3/2 and 5/2 ways control valve

PROPORTIONAL BLEED VALVE

  • Pneumatic valve.
  • Reduced and adjustable contact pressure.
  • High sensibility.
  • Easy to operate.
  • Low maintenance.
  • Valve proportionally bleeds air from Fabric guide input line.
  • Cone control device.
  • Standard valve is Normally Closed (NC), on request can be Normally Open (NO).
  • Palm action can be reversed by reversing cone device (NC to NO or vice versa)
  • Sliding surface in ceramic or tungsten carbide.
  • Max operating temperature: 120 °C.
  • Max air pressure: 0.4 MPa.
  • Valve proportionally bleeds air from Fabric guide input line.
  • Cone control device.
  • Standard valve is Normally Closed (NC), on request can be Normally Open (NO).
  • Palm action can be reversed by reversing cone device (NC to NO or vice versa)
  • Sliding surface in ceramic or tungsten carbide.
  • Max operating temperature: 120 °C.
  • Max air pressure: 0.4 MPa.

PRESSURE BALANCE PALM VALVE W-25600

  • Pneumatic valve.
  • Reduced hysteresis to compensate uneven edges.
  • Low air consumption.
  • Easy to operate.
  • Low maintenance.
  • Valve alternatively adds or bleeds air to and from the Fabric guide.
  • Four ways control device.
  • With stable Fabric the valve is Normally Closed (NC), consequence is no air consumption.
  • Sliding surface in ceramic or tungsten carbide.
  • Max operating temperature: 120 °C.
  • Max air pressure: 0.4 MPa.

PROPORTIONAL BLEED VALVE W-17800

  • Pneumatic valve.
  • High sensibility.
  • Easy to operate.
  • Low maintenance.
  • Valve proportionally bleeds air from Fabric guide input line.
  • Cone control device.
  • Standard valve is Normally Closed (NC), on request can be Normally Open (NO).
  • Palm action can be reversed by reversing cone device (NC to NO or vice versa)
  • Sliding surface in ceramic or tungsten carbide.
  • Max operating temperature: 120 °C.
  • Max air pressure: 0.4 MPa.

ALARM PALM

  • Protects Fabric from excessive run out.
  • Alarm palms detect when Fabric tends to run off.
  • Increase Fabric safety operations.
  • Easy to operate.
  • Low maintenance.
  • Two limit switches detect Fabric run off levels.
    - 1st level  signal wired to ALARM.
    - 2nd level  signal wired to MACHINE STOP.
  • Alarm palms have to be installed not contacting the Fabric, at Front and Back side of the machine.
  • Sliding surface in Stainless Steel.
  • Suitable for wet or high temperature applications.
  • Max operating temperature: 90° C or 120 °C.
  • Accessories: Electric connection box.

ACCESSORIES - BEARING SEATS W-S

  • Simple and reliable system.
  • Easy roll removal.
  • Stainless Steel or painted nodular cast iron execution.
  • Model W-S-110 (W.20027):
    - cylindrical seat: diameter from 80 to 110 mm
    - spherical seat: diameter from 90 to 110 mm
  • Model W-S-155 (W.24445):
    - cylindrical seat: diameter from 110 to 160 mm
    - spherical seat: diameter from 120 to 160 mm
  • Model W-S-190 (W.20028):
    - cylindrical seat: diameter from 170 to 200 mm
    - spherical seat: diameter from 180 to 200 mm
  • Other sizes and dimensions on request