VENJAKOB MASCHINENBAU GMBH & CO KG

Prior to coating plastic workpieces, they can be flame heated using a gas burner to improve adherence. This is not a heat treatment but rather a selective utilisation of the chemical effect of the gas flame. Naturally, we also offer further pretreatment equipment, such as the plasma treatment for example. During flame heating, the surface is briefly subjected to the direct effect of a gas flame fed with extra oxygen. This causes the breaking of molecular bonds in the surface of the substrate to be treated, and the binding of active ions, mainly OH and COOH groups existing in the flame. In this manner, polar groups, enabling the secure bonding of printing inks, lacquers/paints, adhesives, etc. are created in the originally nonpolar material. Due to the formation of polar groups, the surface energy of the treated substrate increases to a measurable amount.

Dust removal devices remove adhering dust particles from the workpieces by means of rotating blowing nozzles. The use of ionisation units enables the removal of electro-static charges from the plastic surface, which promote the adhesion of dust. In order to improve operation, the ionisation unit is combined with a dust removal/blow-off device. In the wood sector, this is generally integrated in the line without ionisation unit or installed directly downstream of a brush sanding/denibbing machine. We offer various dust removal/ionisation systems, according to the requirements of your production process. The COMFORT and PERFECT versions are additionally equipped with a rotating genuine hair brush to remove soiling from the surface. We would be please to provide more detailed information concerning the equipment features upon request.

Pipe cleaning systems are designed according to the processing requirements. Here the machine line length changes equivalent to the throughfeed speed. An alkaline cleaning station that adjusts to the individual degree of soiling of the pipe surface to ensure optimum results can be optionally installed together with a drying unit upstream of the pipe coating line.

The application of CO 2 ice jet spraying is convincing. Ranging between CO 2 cleaning and high-performance dust removal with regard to quality, optimum pretreatment can be accomplished with this system variant, only requiring simple workpiece fixing and little noise protection measures. DUST FREE can be flexibly integrated in existing equipment. A cleaning jet consisting of a mix of compressed air, CO2 and CO2 ice particles causes the soiling on the surface to become brittle. The thermal tension loosens cohesion and detaches the soiling from the workpiece surface. The cleaning jet guarantees the removal of soiling without residue. The DUST FREE and PERFECT applications optimally meet the requirements of the subsequent downstream surface quality, offering maximum thoroughness from dust removal through to cleaning. This process allows gentle cleaning of virtually all components, therefore, it is an alternative to aqueous power washing. Patented detail solutions form the basis for this mature system technology. Small workpieces are reliably held in place by the special hold-down system. The Venjakob pump station developed for this task guarantees the process reliable supply of liquid CO 2 from a low pressure tank system to the cleaning module. A clear advantage of the CO2 cleaning system over the conventional aqueous cleaning process is its relatively small space requirement. Additional decisive advantages of this system are:

Efficiency and quality of this innovative cleaning system are impressive, from the three-dimensional small parts to large format workpieces in large batch sizes. The performance of the CO2 ice jet is especially convincing when cleaning plastic workpieces. The shown surface plant offers optimum noise emission values of approx. 80dB(A) due to the patented noise protection system comprising follower-type bulkhead partitions. A cleaning jet consisting of a mix of compressed air, CO 2 and CO 2 ice particles causes the soiling on the surface to become brittle. The thermal tension loosens cohesion and detaches the soiling from the workpiece surface. The cleaning jet guarantees the removal of soiling without residue. The DUST FREE and PERFECT applications optimally meet the requirements of the subsequent downstream surface quality, offering maximum thoroughness from dust removal through to cleaning. This process allows gentle cleaning of virtually all components, therefore, it is an alternative to aqueous power washing. Patented detail solutions form the basis for this mature system technology. Small workpieces are reliably held in place by the special hold-down system. The Venjakob pump station developed for this task guarantees the process reliable supply of liquid CO 2 from a low pressure tank system to the cleaning module. A clear advantage of the CO 2 cleaning system over the conventional aqueous cleaning process is its relatively small space requirement.

The VEN BRUSH system technology is based on high pressure at low speed. Special hold-down brushes with wide support brushes or narrow support brushes for processing profiled workpieces, ensure the required pressure. For the pretreatment of workpieces of varying shapes or extremely fluctuating sizes, maximum perfection and flexibility are provided by the motor-driven height adjustment of each individual unit as well as by the infinite rotational speed setting. The high-performance vacuum transport belt ensures reliable transport and holds both small as well as large format workpieces in place. A Molton roller is built in to ensure constant cleaning of the conveyor belt. Unit diversity results in a wide performance spectrum and generates a high economic effect. The basis version of VEN BRUSH allows a selection of 2 unit positions to up to 5 unit positions. To be prepared for possibly changing requirements in your production process, you can also select the next larger variant and equip the free unit position as required at a later date. System examples for possible operating widths from 600 to 3,500 and operating lengths from 2,000 to 5,500 mm. Depending on your production requirements, you can individually select from: Short change times and high operating comfort are possible thanks to the quick-exchange brush system using a push-in system together with a coupling. The optional infinite angle setting of the round brushes permits impeccable edge processing. The use of the structured brush unit is intended for special surface processing. This brush is used to structurise furniture parts, hardwood and softwood, flooring boards or to provide an antique look of up to 1 mm deep at a throughfeed speed of 10 m/min. Where required, the VEN BRUSH can be extended by a dust removal system with rotating blow nozzles and ionisation system. Following a brushing or sanding/grinding effect, this complementary function ensures optimum workpiece cleanliness to meet high requirements. As an individual solution, VEN BRUSH convinces as a station in a Venjakob machine line or when integrated in an existing machine line. As such, control system configuration takes all interfaces into account, through to higher ranking control and monitoring. The high-performance system technology can be easily operated directly using a control panel or a touch panel.

By way of additionally integrated longitudinal and cross sanding belt units, the VEN BRUSH HYBRID leads to especially perfect surface finishing results. Cross sanding unit Surface quality is optimised by the cross belt with its sanding cushions. Subsequent finish sanding with the wide sanding belt removes short fibres. Even finish sanding of painted/lacquered surfaces is possible with these uniform results. The uniform sanding pressure on edges and surfaces is possible by the use of pressure pieces, which are permanently attached to the sanding lamella. A cross running pressure lamella belt can be used to prevent oscillation marks. The unit positions can be freely equipped according to the requirements of the production process. Configuration examples:

Since 1994, the 100% Venjakob affiliated company Nutro, USA has designed and installed turnkey robotic paint lines with robots from the most well- recognized and trusted robot suppliers such as ABB, Fanuc, Kuka, Motoman, and Staubli. Robotic paint lines provide the ultimate in precision and repeatability in painting performance. Due to the reduction in downtimes, training and personnel costs, a robotic paint system is ideally suited for paint application lines where uniform coating of complex 3-dimensional parts is needed. In addition to the solid construction, these robotic paint lines offer the safety needed for robots with the latest PLC and PC interfaces. This makes programming and operating simple and error-free for paint line personnel. Robot painters by Nutro are used for the following parts: Venjakob can provide your company with a complete new line or integrate a robot painter into an existing finishing line.

This machine technology developed for coating round steel tubes with a temporary corrosion protection convinces with its high performance. The surface quality of the solvent free coating with 100 % UV lacquer, the fast curing time of ≤ 1 second as well as an overspray recovery rate of more than 95 % are impressive features which, by their very nature, offer high economic efficiency. Additional modules individually perform either the cleaning work, dust removal or marking of tubes. This machine technology ensures perfect transport of the tubes without damage to the lacquer coat, while flexibly taking tube properties into account, such as sleeves or caps, diameters from 20-200 or from 200 to 500 mm, required throughfeed speeds of 30 - 100 m/min as well as surface temperatures from +1°C to +40°C. Whether operated as an individual machine or integrated in an adjustment line, the output parameters are characterised by minimum space requirement and low operating and maintenance costs. An alkaline cleaning station that adjusts to the individual degree of soiling of the tube surface to ensure optimum results can be optionally installed together with a drying unit upstream of the pipe coating line. Venjakob offers individual system solutions for coating tube sleeves. This includes the application of a base coat and coloured rings, as well as marking. Customised solutions for tube marking are available as an option.

With its VEN SPRAY PERFECT Venjakob has the innovative answer to all requirements encountered on the market. Based on decades of know-how in the realisation of high-performance spray painting plants, it is the flexibility of this new generation that convinces. In the long term, the modular system takes into account all production requirements. At the time of machine purchase, its concept realises all variants, from "one off batch size" through to large series production in the high-end range. The modular concept permits implementation of changing framework conditions at any point in time by retrofitting new modules, thereby making your investment future-proof. Working width: 1,300 / 1,600 / 2,200 mm Working height: 940 mm Feed speed: 3-8 m/min Exhaust air volume: 7,000 - 10,000 m³/h Connection value: 20 KW Machine dimensions: 2,280 / 2,800 mm (length of booth) The sophisticated spray gun control minimizes the rate of overspray. With the patented V-belt design up to 98 % of the liquid overspray can be reclaimed. The paint retrieved in this way is recycled into the paint process. Over and above, the innovative ventilation system improves the ecological energy balance. The short setup times, long service life of the filter elements, fast changing times for spray systems and automated paint-change procedures offer a very high degree of efficiency. The twin cleaning units allow the use of solvent-based paints as primer and the direct switchover in split seconds to the second cleaner operating with water-based paints. Maintenance and cleaning operations take place completely separate from the production process.