and high-tech

Strip blow-off system for skin rolling mill 1700

In its program, Production and Engineering Company ENCE GmbH highlights the most significant metallurgical equipment; this equipment complies with the highest international quality standards and may be offered to customers at competitive prices.

Skin rolling mill. Strip blow-off system for skin rolling mill 1700

Engineering company ENCE GmbH offers different units, packages and associated rolling mill equipment, steel strip pickling lines, steel coils hot dip galvanizing lines, strip polymer coating lines and sheet bending machines. As an example company ENCE GmbH offers a solution for blowing off the emulsion from the skin rolling mill developed according to the Customer’s technical assignment.

If the mill speed of the existing rolling mill is limited due to the amount of emulsion at the exit of the rolling mill, the use of a strip blow off system to blow off the emulsion from the skin rolling mill is required. The blow-off system has to be efficient, economically sound and up-to-date.

The excessive amount of the emulsion at the exit of the rolling mill reduces the productivity as well as the rolled product quality. The rest emulsion blow-off system will allow achieving:

  • Stable rolling mill operation and high quality of the products,
  • Rolling mill specified productivity,
  • Maintenance costs saving (energy costs and emulsion consumption),
  • Reduction of time and increased safety of the rolling mill maintenance.

The aim of the strip blow off system from the skin rolling mill is to prevent the strip from the penetration of the excessive emulsion, what is more efficient then to remove the excessive emulsion on the strip.

The strip blow off system from the skin rolling mill will keep the strip clean and dry thanks to the following:

  • Back-up roll cleaning system. Such back-up roll defines the amount of the rolling emulsion feed to the exit of the rolling mill. The system operates along with the emulsion splash guard around the cleaning system and the roll necks, thus providing the minimum emulsion amount transfer from the input to the exit of the skin rolling mill.
  • The system controls the required amount of the emulsion feed to the salient recess of the rolls taking part in the process of rolling and deformation which prevents the strip from the emulsion drops to the exit of the rolling mill.
  • The strip drying system using the air blower with special nozzles prevents the upper surface of the strip from the emulsion fog to the maximum of its full width.
  • The system includes the emulsion drainage to the full width of the strip, as well as the pneumatic and hydraulic control devices for the new equipment.

Source data:

Technical data of the rolling mill
Duty: strip skin rolling
Strip parameters:
Strip width: 900 up to 1550 mm
Output strip thickness: 0,4 up to 3,0 mm
Mill speed: 1500 m/min

Scope of supply:

  • Back up roll cleaning system
  • Emulsion splash guard
  • Work roll air nozzles
  • Pneumatic equipment
  • Hydraulic equipment
  • Electric equipment
  • Miscellaneous equipment
Backup roll cleaning system

Technical data

Location: upper and lower back up rolls

Quantity: two sets, i.e. rolling mill manifolds (upper and lower for each device), four cleaning devices in total.

The load is created with the help of the balancing counterweight system.

The backup roll cleaning devices provide the efficient method of removing the rests of the emulsion from the surface of the upper and lower backup rolls.

The cleaning blades will be located in a special detachable cartridge and can be installed and adjusted during the roll change, off-line for easy maintenance. The cleaning system is mounted with bolts. The regulated fixing screw provides no contact of the blades with the roll surface.

Emulsion splash guard

Technical data

Location: work-roll chock

Quantity: two supporting guards for each rolling mill manifold.

Six guards in total.

Operation principle: excessive emulsion absorption by the material mounted on the inner surfaces of the upper roll chock.

The roll chocks guards are designed to reduce the emulsion flow and splashing along the roll full length as well as around the roll neck.

Such guards are mounted on the inner surfaces of the roll chocks and can be easily removed together with the chock during the roll change.

Work roll air nozzles
Technical data
Location: the exit of the rolling mill (skin rolling mill)
Quantity: one unit
Air nozzles of special design: Type: air blower
Material: aluminum
Quantity: one set
Work-roll nozzles of special design: Type: air blower
Material: aluminum
Quantity: one set
Nozzle for a work-roll: low carbon steel
Total design capacity: 80 dm³/s at 3 bars
Off-take movement: by hydraulic cylinder

Air nozzles

The air blower nozzles are mounted centrally and directed to the backup and work-rolls. This system will blow off the center of the strip removing the emulsion accumulated between the upper backup and upper work-rolls.

The nozzles system is mounted midmost the rolls and is directed to the roll edges, thus providing more efficient removing of excessive emulsion by blowing off every zone of the roll surface.

Work-roll nozzles of special design

Other air nozzles are directed to the work-roll capture area above the rolling line. These air nozzles aim to direct the excessive emulsion feed to the roll surface through the gap between the work-rolls to the strip edges. By this way the excessive emulsion feed to the strip lower surface at the exit of the skin rolling mill is prevented. The nozzles are located inside the mill stand at a distance of the minimum strip width.

The nozzles are mounted specially to blow off the roll surface. This allows the air nozzles to remove any amount of the excessive emulsion which is taken off to the strip edges and then efficiently removed to the roll edges from the strip center.

The work-roll nozzles of special design are hidden in the pipe to protect them from the strip edge strokes. The pipe is made of special steel to reduce the wear rate and protect from damages which can be caused by the strip tail end. The pipe will have a splash guard along the back surface to prevent the excessive emulsion feed to the strip surface.

Drain pan for rolling emulsion

The nozzles are mounted on the steel frame with integrated emulsion splash guard. The supporting frame is mounted on the side guides inside the mill stand. The frame can be removed by the hydraulic cylinder to provide enough space for roll change and access for cleaning the drain pan.

The frame, lower and upper emulsion splash guards and nozzles have a rigid construction which prevents the damages due to strip breakage and coil (strip) end out-brake.

The lower part of the new drain pan is designed to prevent the dew point and will be declined from the strip center, so that the emulsion vapors condensation moves naturally to the pan sides which are beyond the maximum strip width. The drain channel is designed to catch the drops formed on the back side of the pan due to condensation and to drain the emulsion to the pan edges, which are beyond the maximum strip width.

The system air is supplied by the pipeline and flexible hoses.

Pneumatic equipment

The control devices are provided for the whole new equipment with pneumatic functions. The control devices for air flow control are provided for.

Hydraulic equipment

The hydraulic control devices are provided for the new take-off cylinder of the emulsion splash guard system.

Electric equipment

The devices mounted in the system (for example proximity switches, etc.).


The painting will be performed according to the standard painting specification which fully complies with the standard international requirements.

System piping

Each system has piping for connection to the relevant points

System piping

Each system has piping for connection to the relevant points

Unit cabling

Each unit has a cable connection through the junction boxes.

Additional information

Engineering company ENCE GmbH can also offer other special equipment for machining, packing of roll products, as well as components and exchange units of rolling mills: