Innovations of sanding technology

For more than 80 years Heesemann produces sanding machines for industry and handicraft. During this time some essential and trend-setting innovations were made, which still endure. Heesemann has consistently provided new impulses and expedited sanding technology. Until today we have got the pretension to fulfill this role being the innovation leader in sanding technology and are doing everything to meet this claim.

The CSD® system

Our CSD® magntic pressure beam system has been proven and tested for more than two decades as the solution for adaptable processing. The sanding result of a sanding unit with the CSD® system is unreached by other systems till this day.

 

 

Functional Principle

The precise control of the sanding pressure is decisive for a high-grade, uniform surface sanding quality. The computer-controlled selective pressure regulation of the CSD® magnetic beam system can smoothly adjust the sanding pressure to every individual element in the pressure beam within milliseconds. It is particularly important with asymmetrical and round workpieces that the unique CSD® system allows fine adjustment of the contact pressure force in the edge area.

 

A highly sensitive sensing system at the infeed supplies the data for exact calculation of pressure. The elastic pressure beam compensates for workpiece thickness differences of 2 mm and more, whether the variation occurs within a single workpiece or from one workpiece to another. If the edges are designed differently, e. g. through the unilateral use of solid edge banding, the contact pressure can also be asymmetrically controlled in order to increase the sanding force on one side.

 

The contact pressure is generated by maintenance-free electrically controlled electromagnets. Contamination of the system by oil and water, such as those that may occur with pneumatic elements, is impossible.

CSD® plus

CSD® plus is the further development of our established CSD® system. CSD® plus provides two seperatly adjustable pressure beams in one sanding unit and produces an even finer sanding quality.

EnergyManagement-System

The EnergyManagement-System is a system to save energy, from which our environment and the machine-user benefit to the same degree. A diminished energy consumption unburdens the environment and reduces the cost.

The unit drive motors are designed to fulfil the requirements for the highest energy efficiency class. If no workpieces are being fed into the machine, they are run down to a low speed and a flap is closed at the suction tension blower to extremely reduce the air throughput. Depending on its acual load, this reduces the energy consumption of the machine quite considerably. When new workpieces are fed into the machine, all motors are rapidly started up again.

 

If the customer-supplied extraction system provides this option the machine can prevent the airflow through units that are not in operation by controlling closure flaps attached to the individual extraction hoods and thus make the extraction system save energy.

Machinery base: Low-vibration and torsion-resistant

The integral design has brought forth a machine stand with even higher rigidity. Vibrations have been reduced even more, just like the noise emissions. Apart from that, this design allows us to place the vacuum fan inside the machine stand in a space-saving manner.

Special Highlights

  • The channels for the workpiece suction device are integrated inside the machine body.
  • A constant vacuum is created over the entire surface of the transport table.
  • The lifting gears are connected by Cardan shafts.
  • The sanding units are adjusted in their height while the position of the machinery housing remains unchanged.
  • This results in a constant working and terminal height.

Compact design

The Heesemann compact design has the advantage that the sanding machines are delivered completely wired and in one piece. This way time is saved on loading and the risk of a wrong wiring on installation is excluded.

The compact design concerns all Heesemann surface sanding machines. Delivering the machines in one piece allows an extremely fast integration of the machines in existing lines. The result are momentary interruptions in your production. By a clear closed body of the machines with no overlapping drives or units the danger of collisions with internal transport vehicles is minimized significantly. The compact design also boosts the tidiness around the machine.

Industrial PC with web diagnosis

All Heesemann machines are equipped with a powerful and highly flexible industrial PC. All frequently repeated adjustment values are graphically displayed clearly on one screen page.

In addition, this industrial pc provides diversified applications for diagnosis and the ability to use peripheral equipment at standard interfaces. Furthermore it can be connected to internal and external networks using ethernet TCP/IP or modem. The industrial PC acts like a web server and is diagnosable at standard browsers.

 

The industrial PC is available in 10.4" and 15" screen size. The 15" model provides an additional module to record operating data and is moveable to the operators' eye-height by a pivot mounted arm.

Sanding belt cleaning

For a first-class sanding result and long lifetime of the sanding belts an effective sanding belt cleaning system is an essential condition.

Sanding belt cleaning

For a first-class sanding result and long lifetime of the sanding belts an effective sanding belt cleaning system is an essential condition.

The intermitting Heesemann blasting system cleans directly behind the sanding area at the height of the return roller. At this place the pores of the sanding belt are opened optimally. Due to the combination of blasting and extraction a maximum cleaning effect is ensured. Another positive effect of this favourable configuration is the low extraction volume and a low compressed air consumption.

Sanding belt cleaning

Workpiece cleaning

Particularly for the thin lacquer coatings which become more and more common a perfect workpiece cleaning is getting more essential.

The Heesemann range of sanding machines include various systems for cleaning the surfaces and edges. Cleaning brushes are a standard feature of our machines. In addition a compressed air rotating unit including an extraction duct can be offered. For an extensive cleaning a separate dust removing machine EA 10 with an integrated compressed air ventilator is available. This unit can also be supplied as a seperate cleaning machine EA 10-C with an own industrial PC for installation in front of lacquer lines. For neutralizing the electrostatic charge ionization bars are available.

Servo drives with water cooling system

Due to the use of new and extremely thin lacquer systems it can become necessary to reduce the sanding belt speeds to lower speeds than generally achievable with frequency inverters.

As a trend-setting innovation for this purpose Heesemann offers equipment with most modern drive technology. Even at minimum belt speeds of 0.1 m/s the water-cooled servo drives allow a constant and safe belt running at full sanding power without any fluctuations in speed. Machines equipped with these servomotors can be used for water lacquer systems for example. The water-cooled servo drives are comparable to efficiency class IE 4.

Poly-V belt drive:
high-quality and powerful

Smooth-running sanding units

The employment of ripped belts provide a high running smoothness of Heesemann sanding machines. Contrary to multiple single v-belts these ripped belts run with considerably lower vibration. The velocity-synchronous drive of both guide rollers at the unit allow a high power transmission at low sanding belt tension. This permits a high pressure beam tolerance compensation and a high sanding belt adaptability on distorted workpieces and workpieces with certain amounts of tolerance. In addition, the sanding units' running smoothness is optimized through fine-balanced rolls.

Heesemann sanding units

Heesemann sanding machines offer a wide reportory of units mountable on the machinery base. The machine is arranged according to the customers needs. These units are available:

Contact roller unit

Contact roller unit

The Heesemann contact roller units are offered with steel rollers as well as with rubber-coated rollers in different Shore hardnesses. Both models are deliverable with different roller diameters.

The contact roller unit with a 250 mm steel roller for example allows the exact calibration of materials like solid wood, flake boards, MDF or plastics. The surface of the roller is grooved in a spiral shape. This allows a better cooling of the roller and makes it easier to extract the generated abrasive dust.

 

Contact roller units with rubber-coated rollers can be delivered as well. Depending on their Shore hardness they can be used for varying sanding tasks.

 

The contact roller unit can be equipped with different kinds of press-on lips depending on the requirements.

Cross sanding unit

For wooden surfaces the cross sanding method achieves the worldwide accepted best sanding result. The workpiece are sanded crosswise to the grain direction first and are afterwards sanded in direction of the grain with one or more sanding units.

This way the higher standing harder areas of the annual rings are leveled and loosened fibres are sheared off whereby a wash out effect is avoided and the fibres can not straighten up again after lacquering.

 

The Heesemann cross sanding units are equipped with the Heesemann CSD® magnetic pressure beam system and a pressure segment belt. They are available as three-point and four-point units as well as with commonly or separately driven pressure segment belt.

Cross sanding unit
Longitudinal sanding unit

Longitudinal sanding unit

The longitudinal sanding units of the Heesemann surface sanding machines are equipped with the well-proven CSD® magnetic pressure beam system. Optionally they can be equipped with an eccentric bearing of the first bend pulley for slight calibration processes, with a pressure segment belt running inside and with the even finer CSD® plus system.

The longitudinal sanding units are available with sanding belt lengths of 2,150 mm (MFA Impression), 2,620 mm and 3,250 mm (MFA 10 and above). An optional pneumatical support makes it easier to exchange the sanding belts fastly.

 

The internally running pressure segment belt is an addition that makes sense for many applications. The pressure segment belt interrupts the sanding traces of the grit and achieves a even more harmonious sanding result. If a very fine grit is used for lacquer sanding the pressure segment belt may significantly increase the lifetime of the abrasive material.

 

The front bend pulley can be equipped with an eccentric bearing for slight calibration processes that can be activated using the command terminal.

Orbital sanding unit

On sanding frames and other workpieces with different grain directions sanding crosswise to the grain direction can not be avoided. The generated sanding traces are strongly in evidence especially if dark stains are used. The Heesemann orbital sanding unit removes these traces.

The unit works based on a frequency controlled eccentric vibration with big hub. An additional segment belt press-on system moves between the pressure beam and a vibrating sanding belt crosswise to the feed direction.

 

Hereby the sanding traces of the vibrating sanding belt are interrupted and a harmonious sanding result without any disturbing sanding traces is achieved.

Orbital sanding unit
RUT disk brush unit

RUT disk brush unit

The RUT disk brush unit consists of 19 disk brushes. Their arrangement allows the sanding of contours in an up to now unreached quality. All areas are evenly sanded in different directions.

The frequency controlled drive system permits a continuous regulation of the disk brushes rotation speed their orbital velocity transversally to the feed direction.

 

The disk brushes can be equipped with two different abrasives at the same time. Thus the RUT unit can sand in different granulations running in and against feed direction.

 

Due to the quick changing device replacing the disk brushes with fittings for sanding for example by structuring brushes can be done with a few handles.

Brush units

For Heesemann sanding machines a wide variety of brush units with different trimmings for sanding and structuring are available. The brush units can be mounted inclined to the feed direction or can be equipped with an oscillation.

Heesemann offers brushes with horsehair, fibre, sisal cord and mixed trimmings to clean the workpieces, fleece brushes to satin lacquered surfaces, brushes with Flextrim abrasive trimmings to sand 3-dimensional workpieces and brushes with Anderlon or stranded wire trimmings as well as twisted knot brushes to structure the workpieces.

Brush units

Address

Karl Heesemann
Maschinenfabrik GmbH & Co. KG
Reuterstraße 15

32547 Bad Oeynhausen / Germany

Phone: +49 5731 188 0
Fax: +49 5731 3571
Karl Heesemann
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Contact

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© Karl Heesemann Maschinenfabrik GmbH & Co.KG