Used Metal Working Cz Butt Welding Machine For Plastic Sheets for sale (80,985)

Condition: used, functionality: fully functional, Year of construction: 2014, power: 8 kW (10.88 HP), platform length: 4,100 mm, overall weight: 2,850 kg, transport length: 5,700 mm, transport width: 1,330 mm, transport height: 1,300 mm, construction height: 1,300 mm, Equipment: CE marking, The WORK SP 4000 CNC butt welding machine for plastic sheets is manufactured by the Czech company METAL WORKING CZ, s.r.o. It was produced in 2014, is in excellent condition, and comes with a spare Teflon coating. This is a high-tech industrial machine with CNC control, designed for the precise welding of thermoplastic sheets and panels. The main technical parameters and features of this machine series include: Main technical parameters: Maximum working width (welding length): 4000 mm, allowing for the processing of very large plastic sheets. Iasdpfx Aszdiz Nequeu Thickness of materials to be welded: Typically in the range of 2 mm to 25–30 mm (depending on the specific modification and type of plastic). Compatible materials: Thermoplastic sheets made of PE (polyethylene), PP (polypropylene), PVDF (polyvinylidene fluoride), and PVC (polyvinyl chloride). Welding type: Butt-welding with a heating element, using the heated element / hot plate welding method. Control and CNC functionality: Fully automatic cycle: The CNC control precisely manages all phases of the welding process: preheating, transfer time, welding pressure creation, and cooling time. Material database: A system with pre-set welding parameters according to international standards (e.g., DVS standards for welding plastics). Data logging: Automatic generation and recording of welding protocols for quality control (containing information on pressure, temperature, and cycle duration). Advantages of the design: High mechanical stability: A massive steel frame ensures even distribution of pressure along the entire length of the 4-meter sheet. Hydraulic system: Precise adjustment of the clamping force, guaranteeing a homogeneous weld seam without internal stresses. Teflon coating: The heating element is equipped with a high-quality non-stick coating for easy cleaning and to prevent material burning. Length: 5700 mm Width: 1330 mm Height: 1300 mm Weight: 2850 kg Working length: 4100 mm Working height of the machine: 950 mm Minimum thickness of the plastic sheet: 4 mm Maximum thickness of the plastic sheet: 40 mm Machine power: 8 kW Operating voltage - electrical circuits: 3 PEN 50Hz 400/230V Air consumption: 0.8 m³/h Minimum pneumatic pressure: 0.8 MPa Maximum pneumatic pressure: 1.0 MPa Standard for electrical equipment: EN 60204-1 Applicable basic and technical standards: See Chapter 3.3 of the manual Maximum noise level at the workstation: 70 dB If you have any further questions or need more information, please send us a message or call.

Condition: new, Year of construction: 2024, functionality: fully functional, input voltage: 400 V, type of input current: three-phase, The innovative flash butt welding machine for bandsaw and bimetal blades is developed entirely by our engineering department. It guarantees perfect welds and precise repeatability of the process. User friendly touch screen display from Schneider Electric that allows you to operate the machine effortlessly. The welding process is fully automatic, with the capability to adjust the electric current in 6 stages. The machine also allows for stepless regulation of electric current during annealing and pyrometric control throughout the welding process. The FBM10 is extremely easy to set up and cost-effective to maintain. Power supply voltage 400V Rated transformer capacity at 50% duty cycle 5kVA Frequency of electrical current 50HZ Clamping of the band saw blade Manual or Hydraulic clamping /Optional FBM 10.02/ Iedpfxexhf Dze Aqusau Annealing Manual or Automatic, with pyrometric control /Optional/ Menu language Bg / En / Possibility for welding: - band saw blades for wood mm 6÷60 - Bi-metal band saw blades mm 6÷54 - stainless steel band saw blades mm 6÷40 - band saw blades without teeth mm 6÷50 Weight: 197kg Dimensions: (length х width х height) mm 910 х 640 х 530

Condition: new, material width 1015 mm material thickness 1 mm speed von Hand Iodpfjupxdksx Aquoau weight 240 Kg dimensions 1420 x 600 x 750 m

Year of construction: 2006, condition: used, functionality: fully functional, machine/vehicle number: 12/06, We are offering this used METAL WORKING CZ, s.r.o. SPS2000 CNC hot plate welding machine, manufactured in 2006. If you have any questions or require further information, please do not hesitate to send us a message or contact us by phone. Iaodpfezdfc Dox Aquju

Condition: new, functionality: fully functional, Year of construction: 2025, travel distance X-axis: 50,000 mm, travel distance Y-axis: 4,000 mm, input voltage: 380 V, input frequency: 50 Hz, warranty duration: 24 months, Equipment: cooling unit, GS-50040LB (Bevel Cutting) Ultra-Large Format Laser Cutting Machine 40kW Bevel Cutting + 60kW Straight Cutting Dual Beam, Dual Head, Dual Ultra Iajdpfov Ng E Tsx Aquju Ultra-Large Cutting Area: 50m × 4m Dual High-Power Cutting Heads – 60kW Straight & 40kW Bevel Cutting Precision Cutting for Ultra-Thick Plates Bevel Cutting Performance: ✔ Y-Bevel: 40kW | 20mm Carbon Steel | 1.4m/min ✔ K-Bevel: 40kW | 30mm Carbon Steel | 0.35m/min ✔ V-Bevel: 40kW | 50mm Carbon Steel | 0.2m/min ✔ Straight Cutting: 60kW | 150mm Carbon Steel | 0.3m/min Applications: Aerospace | Shipbuilding | Bridges | Heavy Machinery

Condition: new, Year of construction: 2026, -TFON Edge Rounding Machine Specifications: Material Compatibility: Steel, Aluminum, Stainless Steel. Process: Edge Rounding. Material Thickness: 0 – 120 mm Maximum Material Width: 1,000 mm Minimum Part Dimensions: 50 × 50 mm Maximum Material Weight: 500 kg. Conveyor Speed: 0.6 – 4.0 m/min Machine Weight: 3.000 kg Iajdpsui Ih Rofx Aqusu

Condition: new, Year of construction: 2026, -Tfon Bevel Wizard® Linear. -Precision Beveling for Linear & Non-Linear Applications. -The TFON Bevel Wizard® Linear is a high-performance beveling solution designed to deliver exceptional accuracy on both straight and contoured sheet edges. Engineered with flexibility at its core, it features an advanced Trace Tracking System that automatically adjusts to variations in material thickness and geometry—ensuring precise and consistent edge processing even for complex parts. -Key Features 🔹 Advanced Trace Tracking System: Intelligently detects and adapts to diverse edge shapes and contours in real time. 🔹 Wide Beveling Range: Adjustable bevel angles from -30° to +80°, ideal for a broad range of applications. Iajdpfert Tpnjx Aqusu - Optimized for Large Workpieces: Capable of processing materials up to 12,000 mm in length and 100 mm in thickness. - Industrial-Grade Durability: Built to last with a solid 10,000 kg frame for long-term reliability. 🔹 Superior Surface Finish: Delivers a high-quality finish with a consistent Emery Band Rotation Speed of 30 m/min and a Ø135 mm contact wheel. -Technical Specifications: Beveling Angle Range: -30° to +80° -Material Thickness: 4 – 100 mm. -Minimum Material Width: 250 mm. Minimum Material Length: 250 mm Maximum Material Length: 12,000 mm Part Feed Speed: 1.5 – 5 m/min Part Completion Speed: 3 meters/day Maximum Part Indentation: Ø400 mm Emery Band Rotation Speed: 30 m/min Contact Wheel Diameter: Ø135 mm. Emery Band Drum Diameter: Ø400 mm. Machine Weight: 10,000 kg Engineered for precision. Built for performance. Designed for industrial excellence Tfon Bevel Wizard® Linear — Where Accuracy Meets Efficiency...

Condition: new, Year of construction: 2026, -TFON Edge Rounding & Surface Processing System: Designed for superior versatility and precision, this system is engineered to process mild steel, aluminum, and stainless steel materials with thicknesses from 0 to 120 mm. It offers advanced edge rounding and surface cleaning capabilities tailored to demanding industrial applications. -Material Compatibility: Isdpfx Aqsi E Tkajueau -Mild Steel, Aluminum, Stainless Steel. -Working Thickness Range: -0 – 120 mm Edge Rounding: Radius 2 edge rounding for smooth, safe edges that enhance both aesthetics and functionality Precision Control: Integrated Siemens automation system delivers accurate, consistent control throughout processing. Independent Processing Stations: Multiple stations allow simultaneous or sequential processing, offering flexible workflow configurations. Table Size Options: Available with 650 mm, 1000 mm, or 1300 mm working widths to suit diverse production requirements Table Types: Magnetic, vacuum, or magnetic-vacuum tables provide secure, adaptable support for various materials and part sizes. Plasma & Oxygen Technology: Advanced plasma and oxygen systems efficiently remove heavy burrs and dross after cutting, ensuring cleaner surfaces. Surface Purification: Effectively eliminates dirt, rust, oxide, and scale, preparing parts for subsequent processing such as welding or coating Edge Rounding for Coating: Produces uniform, defect-free edges ideal for painting and coating applications. Industry Applications: Steel Service Centers, Energy, Mining, Construction, Automotive — engineered for heavy-duty, high-performance use. Uniform Edge Results: 8 flap wheels work together to deliver consistent radius edges on every part. Pneumatic Oscillation System: Extends abrasive band life and maintains consistent performance by reducing wear through pneumatic oscillation. Engineered for industrial precision. Built for durability. Designed for versatile applications. TFON – Excellence in Edge Processing and Surface Preparation.

Condition: refurbished (used), Year of construction: 2022, -Pre-owned Surfacer Series TFON RB-2510 (M) -This TFON RB-2510 is a reliable, well-maintained pre-owned machine, ready for immediate use. Ijdpoiih Aasfx Aqusau --Previously utilized exclusively in our inhouse production for deburring and edge rounding applications, this unit remains in excellent working condition and is fully operational. It has proven its reliability and durability, making it a strong choice for long-term use in your production line..

Condition: new, Year of construction: 2026, Custom-Made Machines Tailored to Your Production Needs. Our custom-made machines are meticulously designed and engineered to meet the unique demands of your production processes. Whether your focus is finishing, oxide removal, or radius edge rounding, these machines deliver outstanding precision and performance. -Finishing: Achieve smooth, high-quality finishes on a wide range of materials, ensuring a consistently professional, polished appearance. Isdpfx Aqohq Dbxeuoau -Oxide Removal: Effectively eliminate surface oxides to provide a clean, contaminant-free surface—essential for further processing or coating applications. -Radius Edge Rounding: Precisely round edges to your specified radius, enhancing both safety and the overall quality of your finished products. -Customization Options Each machine is tailored specifically to your requirements, offering flexibility in: Processing Speeds: Adjustable to match your varying production demands. Special Features: Options include dust and fume extraction systems, adjustable pressure settings, and programmable configurations designed to optimize your workflow. Built for Durability.. Constructed with longevity in mind, our custom machines are built to perform reliably through extended production cycles. Whether for small-scale projects or high-volume industrial applications, these machines provide exceptional results, year after year.

Condition: new, Year of construction: 2026, -TFON Edge Rounding & Surface Purification System -Material Compatibility. Mild Steel, Aluminum, and Stainless Steel -Working Thickness Range: Accommodates material thicknesses from 0 to 120 mm. -Edge Rounding Provides Radius 2 edge rounding for smooth, safe edges that enhance both the appearance and functionality of the workpiece. -Precision Control: Equipped with a Siemens automation system for accurate and consistent control throughout the entire process. Independent Stations: Multiple processing stations enable versatile operations, allowing different tasks to be performed simultaneously or sequentially. Table Options: Available working table sizes of 650 mm, 1000 mm, or 1300 mm to meet specific production requirements. Table Types: Flexible configurations including magnetic, vacuum, or magnetic-vacuum tables ensure secure support for various materials and part sizes. Plasma and Oxygen Technology: Utilizes advanced plasma and oxygen technology to effectively remove heavy burrs and dross after cutting, delivering cleaner and smoother surfaces. Surface Purification: Efficiently removes surface contaminants such as rust, oxide, and scale, preparing parts for further processing. Edge Rounding for Coating: Prepares parts perfectly for painting and coating by ensuring a uniform, imperfection-free surface. Industry Applications: Ideal for Steel Service Centers, Energy, Mining, Construction, and Automotive sectors, offering tailored solutions for heavy-duty applications. Uniform Results: Six flap wheels operate in unison to provide consistent, equal radius edges on every part. Iaodpfx Aqohq A T Ueusu Pneumatic Oscillation System: Extends the lifespan of emery bands by minimizing wear and maintaining consistent performance over time.

Condition: new, Year of construction: 2026, -TFON Precision Edge Rounding & Finishing System. Designed for superior surface finishing and edge rounding across a wide range of materials and industries, the TFON system combines advanced automation with versatile configurations to meet your exact production needs. -Material Compatibility: Suitable for aluminium, stainless steel, and mild steel applications. -Wide Thickness Range: Efficiently processes materials from 0 to 120 mm thick -Finishing Excellence: Engineered to deliver high-quality surface finishes that enhance product aesthetics and functionality. Industrial Versatility: Ideal for medical devices, commercial kitchen equipment, automotive parts, and metal accessories industries. Edge Rounding Precision: Provides precise Radius 2 edge rounding, improving safety and enhancing the final product appearance Advanced Automation: Integrated Siemens control system ensures enhanced precision and operational reliability Independent Processing Stations: Enable flexible, efficient multi-stage processing tailored to complex workflows. Multiple Table Width Options: Available with table widths of 650 mm, 1000 mm, or 1300 mm to accommodate diverse production requirements. Customisable Conveyor Options: Choose from vacuum, semi-magnetic, or semi-vacuum conveyor systems for safe and secure part handling. Surface Cleaning: Effectively removes rust, oxides, and surface contaminants to prepare parts for downstream processing. Improved Operator Safety: Edge rounding station minimizes risks of cuts and injuries from sharp edges. High-Performance Finishing: Equipped with Scotch abrasive technology to deliver smooth, even finishes. Extended Abrasive Life: Pneumatic oscillation system maximizes abrasive band and Scotch abrasive longevity, reducing downtime. Ijdpfxohq Dbmo Aqusau Consistent Radius Output: Six flap wheels ensure uniform edge radii on every part for consistent quality. Engineered for performance. Designed for safety. Built for industrial versatility. TFON – Surface perfection, every time

Condition: new, Year of construction: 2026, -TFON Precision Edge Rounding & Finishing System. -Designed for superior surface finishing and edge rounding across a wide range of materials and industries, the TFON system combines advanced automation with versatile configurations to meet your exact production needs. -Material Compatibility: Suitable for aluminium, stainless steel, and mild steel applications. -Wide Thickness Range: Efficiently processes materials from 0 to 120 mm thick. -Finishing Excellence: Engineered to deliver high-quality surface finishes that enhance product aesthetics and functionality. Industrial Versatility: Ideal for medical devices, commercial kitchen equipment, automotive parts, and metal accessories industries. Iasdpfx Ajhq A Txoquou Edge Rounding Precision: Provides precise Radius 2 edge rounding, improving safety and enhancing the final product appearance. Advanced Automation: Integrated Siemens control system ensures enhanced precision and operational reliability. Independent Processing Stations: Enable flexible, efficient multi-stage processing tailored to complex workflows. Multiple Table Width Options: Available with table widths of 650 mm, 1000 mm, or 1300 mm to accommodate diverse production requirements. Customisable Conveyor Options: Choose from vacuum, semi-magnetic, or semi-vacuum conveyor systems for safe and secure part handling. Surface Cleaning: Effectively removes rust, oxides, and surface contaminants to prepare parts for downstream processing. Improved Operator Safety: Edge rounding station minimizes risks of cuts and injuries from sharp edges. High-Performance Finishing: Equipped with Scotch abrasive technology to deliver smooth, even finishes. Extended Abrasive Life: Pneumatic oscillation system maximizes abrasive band and Scotch abrasive longevity, reducing downtime. Consistent Radius Output : Six flap wheels ensure uniform edge radii on every part for consistent quality. Engineered for performance. Designed for safety. Built for industrial versatility. TFON – Surface perfection, every time.

Condition: new, functionality: limited functionality, Year of construction: 2025, control type: manual, Equipment: CE marking, documentation/manual, OMEC 4-Roller Mechanical Symmetric Plate Rolling Machine with Double Pinch 1530×2.5 mm Brand new, CE certified. Made in Italy. Double pinch. Top and bottom rollers powered with equal torque. Side rollers motorized for upward/downward movement. Front-opening top roller. Special bearings for side rollers. External lever to control roller inclination. Sheet clamping with bearing-actuated device. Two-pedal foot control. Electrical panel compliant with CE standards. Millimeter indicator for sheet clamping position. Standard equipment included with the plate rolling machine: - Frontal conical device on top roller. Iaodpfx Aqsy E Schjueu - No. 2 digital displays for the side roller positions. - No. 1 digital display for the motorized sheet clamping. - Grinding/Turning of rollers after hardening treatment. - Roller hardening. - Side sheet loading table with sheet centering stops, marked in mm. Working length: 1530 mm. Top and bottom roller diameter: 90 mm. Side roller diameter: 95 mm. Plate thickness: 1.5 – 2 – 2.5 mm. (1.5 x D / 3 x D / 5 x D). Roller hardness: 55/60 HRC, 2 mm case depth. Installed power: 1.8 kW. Dimensions: 2290 x 750 x h 1150 mm. Weight: 690 kg.

Condition: used, Year of construction: 2024, operating hours: 76 h, machine/vehicle number: SN073545, Options: - Conveyor belt cleaning Iasdpfezdcxisx Aqusu - Interior lighting

Condition: used, Year of construction: 2024, operating hours: 26 h, machine/vehicle number: SN064871, Options: - RFID chips LiServ 4.0 - Energy measurement package Balluf Smartlight ME 5000 Iajdszdcxcspfx Aquou - Barcode scanner

Condition: new, Year of construction: 2026, -TFON Lite SURFACER® Series The TFON Lite SURFACER® Series enables simultaneous processing of multiple parts, offering unmatched versatility through a range of consumable options and an efficient vacuum table system. Designed for ease of use, it features quick brush changes and the capability to mount two different brushes tailored to your specific applications. Iasdpfx Asqzxhysquou -With brushes mounted parallel to the table, the system guarantees flawless grinding performance with every use. Ergonomically engineered, the motor weight is supported by the machine frame itself, significantly reducing operator fatigue and improving workplace safety. -Backed by TFON’s trusted guarantee, the SURFACER® Series strikes the perfect balance between minimizing operational costs and maximizing finish quality. Key Specifications: -Minimum Material Size: 80 × 80 mm. Material Thickness: 3 – 200 mm. Maximum Material Width: 800 mm. Maximum Material Length: 500 mm

Condition: good (used), functionality: fully functional, input voltage: 400 V, input frequency: 50 Hz, DGUV certified until: 07/2027, type of input current: three-phase, Sheet metal cleaning machine Jeros 5015/828 for 2-edge sheet metal short side raised Iodpfx Ajyaklcsqujau stainless steel design with oiling function DGUV V3 certified – available only from us Connection: 400V, 16A-CEE plug Used machine Come and visit us!

Condition: used, Swivel bending machine HM, type KSM-5 / 2500 Manufacturer's No. 2004 / 3262, Year of manufacture 2004 Iajdpfx Aqszbhuwjueu Useful length 2520 mm Maximum sheet thickness 5 mm at 400 N/mm² Stroke of the upper ram 200 mm Adjustability of the bending ram 60 mm Motor power, upper ram 2.2 kW Motor power, bending ram 4 kW Mains connection 400 volts, 50 Hz - One-piece top beam 135° (installed) - Segmented gooseneck tool with mounting rail - Round tool for rounding up to 180° - Various bending tools for the bending ram - Adjustable bending angle via handwheel with clamping mechanism - Electric foot switches - Operating manual with electrical diagram available - Without rear stop Space requirement L x W x H 3900 x 1150 x 1560 mm Weight (machine) 4700 kg Weight (tools) 250 kg In good condition

Condition: new, Year of construction: 2024, functionality: fully functional, total length: 3,100 mm, total width: 1,400 mm, total height: 1,800 mm, overall weight: 2,300 kg, nominal power: 23.5 kW (31.95 HP), 12 months warranty, 1800 operating hours Iajdpfxsyw Hhvo Aqusu

Condition: used, Year of construction: 2025, operating hours: 630 h, functionality: fully functional, - 12-month warranty Equipment: - Powergrip - 2 x 400 mm magnetic track - Interior lighting - Belt drive control for the R-unit Iodpfx Ajy Ar Dgsqusau

Condition: excellent (used), Year of construction: 2016, functionality: fully functional, input voltage: 400 V, total length: 1,100 mm, total width: 1,320 mm, total height: 1,050 mm, input frequency: 50 Hz, Sheet metal cleaning machine KD-Putz Tubur Premium Iaodpfxoyv U Nfs Aquju Sheet metal cleaning machine for baking trays / perforated sheets short side raised stainless steel version with oiling system & sheet metal trolley connection 400V, 16A CEE plug dimensions: 1320 x 1100 x 1050 mm, WxDxH used machine, available from a bakery.

Year of construction: 2026, condition: new, functionality: fully functional, machine/vehicle number: 2026, NEW +++ NEW 3 & 4-Edge Sheet Metal Cleaning Machine NEW +++ NEW Operated by 1 person Stainless steel version, mobile Maximum sheet metal size: up to 600 x 800 mm Removable collection tray at the bottom Dimensions: 2234 x 630 x 1372 mm, L x W x H The versatility of the tray/sheet metal cleaner is also evident in its ability to process 4-edge trays with an edge height of up to 24 mm. Contaminants collect under the cleaner on a pull-out, easy-to-empty shelf. The unit is fully mobile and can be easily moved to the desired location after work is completed. The entire structure is shot-blasted, ensuring that the surfaces are as smooth and hygienic as possible. Connection: 400V, 16A-CEE plug New unit Isdsw S Slnepfx Aqueau With warranty + spare parts service Quality from a specialist company! Benefit from over 35 years of experience! Options: Sheet metal cleaning up to 600 x 1000 mm Greasing/oiling for sheet metal Service package Delivery service Instruction and commissioning Visit us!

Condition: like new (used), Year of construction: 2024, functionality: fully functional, working width: 200 mm, sheet thickness (max.): 100 mm, total length: 1,850 mm, total width: 670 mm, total height: 2,145 mm, overall weight: 1,090 kg, input voltage: 400 V, input frequency: 50 Hz, power: 8 kW (10.88 HP), workpiece width (max.): 1,200 mm, input current: 16 A, This machine has only been used as a test model and is therefore in excellent condition. Iasdpfxjyt I U Uo Aqusu You are always welcome to visit our showroom in Bergeijk to take a look. 2024 Deburring and Finishing Machine F200 XL with vacuum support. Suitable for deburring, rounding, and/or grinding steel cut parts up to 200 mm wide. Discover the advanced F200 XL finishing machine. All products, from a euro coin to 200 mm wide, can be processed on this small but powerful machine. At the input side, burrs and irregularities are removed by a grinding unit, resulting in a smooth and burr-free surface. This is followed by two oscillating cup brushes that apply light pressure. The brushes ensure a uniform rounding of all edges and holes, both around and within the flat-ground product, leading to the most optimal finish. The F200 XL offers options for automatic brush calibration, which ensures constant consistency and precision, as well as full ERP control and seamless integration into automated production environments. In short, it is a finishing machine that is fully prepared for the future! We can now offer you this F200 XL - VAC showroom machine, manufactured in 2024, which can optionally be combined with a WES3000 wet-dust extraction unit and associated piping. Available only until it is sold. The machine is supplied with a 1-year warranty, excluding wear parts. Delivery is ex works Bergeijk. If desired, we can also offer the machine including transport, installation, and training of your operators on-site. We also have a lightly used F200 XL machine with magnetic product fixation available, manufactured in 2023. This machine can be viewed in the showroom in the Netherlands. Contact us, and we will send you an interesting offer.

Condition: used, Year of construction: 2005, total length: 3,940 mm, total width: 1,980 mm, total height: 2,010 mm, Empty weight: 7.000 kg Working width: 950mm Working height: 0,5-120mm Ijdpfx Aqjxwnbueuoau - Year: 2005 - Documentation available: No - CE marking present: Yes - CE certificate present: No - Serial number: - Drive system: CNC - Number of stations [pcs]: 3 - Power [kW]: 39 - Min. sheet thickness [mm]: 0.5 - Max. sheet thickness [mm]: 120 - Max. working width [mm]: 950 - Transport dimensions: 3940mm x 1980mm x 2010mm (l x w x h) - Transport weight [kg]: 7000kg - Transport packages [pcs.]: 4 Financial information VAT: The price shown is exclusive of VAT VAT/margin: VAT deductible for entrepreneurs Delivery and trade-in always possible for everything in the industrial sectors Lukas van Rossum