Used Cross-Cut Shear 1.650 X 2 Mm for sale (1,18,006)

Year of construction: 1991, condition: good (used), design: rotary shear strip width: 500 - 1.650 mm strip thickness 0,3 - 2 mm Hsdpfegnyy Tex Akzsn

Condition: good (used), design: Cutmatic strip width: max. 2.150 mm strip thickness: max. 6 mm Hjdpfxowzvlxs Akzjn

Condition: good (used), Year of construction: 1964, Sheet metal shears, tin scissors, sheet metal scissors, hydraulic shears Hsdehr Exiepfx Akzon -Sheet shear: hydraulic -Cutting width: 2580 mm -Maximum cutting thickness: Steel 2 mm / Aluminum 3 mm -Space requirement: 3020/2000/H1320 mm -Transport dimensions: 3020/2000/1320 mm -Weight: 3185 kg

Condition: good (used), Year of construction: 1962, guillotine shears, sheet metal shears, metal sheet shears, crank guillotine shears -mechanical guillotine shears -Cutting width: 2040 mm -max. cutting thickness: 2.0 mm -Equipment: back stop, side stop, 3 supports -Drive: 5.5 kW -Installation dimensions: 2650/1900/H1070 mm Hjdpfx Aodzd Huekzsn -Transport dimensions: 2650/730/H1070 mm -Weight: 1378 kg

Condition: excellent (used), Your contact persons in our company: Mr.: Andre Evering Mr.: Mario Klöver Mr.: Falk Deutsch Mr.: Simon Blank Included in delivery: 01x CS Sigma profile, used material color: sendzimir galvanized profile length: approx. 1.650 mm CS Sigma: approx. 200 x 65 x 18 mm material thickness: approx. 1,50 mm weight / pcs.: approx. 7,500 Kg Remark: The pictured angles are not part of the offer. General information about the item: This item is offered for pickup only. Any additional transport or shipping of this item or a shipment of this article is associated with additional costs, which can be requested separately depending on the delivery location or scope of delivery can be requested from us. Our services at a glance: (prices on request) Assembly, erection our general assembly conditions are to be observed Rack inspection Hedjhwduxspfx Akzon Rack inspection according to DIN EN 15635 executed according to the requirements of BGR 234 visual inspection for all racking systems Delivery with our own fleet (without unloading)

Condition: new, Year of construction: 2025, control type: CNC control, actuation type: hydraulic, working width: 4,000 mm, cutting angle (min.): 0.5 °, cutting angle (max.): 3 °, stroke rate (min.): 12 1/min, sheet thickness (max.): 10 mm, sheet thickness steel (max.): 10 mm, STANDARD FEATURES CNC-controlled, angle-adjustable hydraulic guillotine shear CNC-controlled blade gap adjustment, stroke and cutting angle adjustment Touchscreen CNC control unit (ELGO P40T) Automatic cutting angle adjustment (according to material type and thickness) Automatic stroke reduction feature (increased speed for short cuts) High-precision, stress-relieved steel frame Hardened guides and roller-equipped upper table movement system 1,000 mm CNC-controlled, motorized, and programmable backgauge Backgauge features: - Programmable retraction - Raising function for long sheets - ±0.1 mm positioning accuracy Hsdpfx Asx Nqphskzsn Ball support front table for sheet feeding Upper blade: 2 cutting edges / Lower blade: 4 cutting edges High-alloy steel blades Special joint system requiring minimal maintenance Front squaring arms with scale, T-slot, and adjustable stopper (1,000 mm) Cutting line illumination and shadow wire Front finger guard plate (openable type) Front and side safety covers Foot pedal Movable control lever Emergency stop buttons Safety equipment in compliance with CE standards OPTIONAL FEATURES Rear pneumatic sheet support system – Type 1 Rear pneumatic sheet support system – Type 2 (with sheet return function) Angle-adjustable front gauge (0–180°) Front squaring arms in custom lengths Full-length openable front finger guard cover Front finger safety light curtain Rear safety light barrier (CE-compliant) Special blade options Laser cutting line Oil heater or oil cooler Automatic or manual central lubrication system Electric cabinet cooling system (air-conditioned) CNC-controlled front sheet support and feeding arms Special throat depth (500 mm) Light-duty guarding TECHNICAL SPECIFICATIONS (C 10 / 4000 MODEL) Cutting capacity (450 N/mm²): 10 mm Cutting capacity (700 N/mm²): 6 mm Cutting length: 4,000 mm Cutting angle: 0.5° – 3° (CNC-controlled) Cutting stroke: Automatically adjustable Throat depth: 250 mm Backgauge movement range (X axis): 1,000 mm Cutting speed: 6 – 12 strokes/min Motor power: 22 kW Oil tank capacity: 300 liters Machine weight: ~16 tons Machine dimensions (LxWxH): approx. 5,790 x 3,650 x 2,580 mm

Condition: good (used), Year of construction: 1980, Sheet metal shears, tin snips, sheet metal sheet metal shears, crank-operated sheet metal shears, auxiliary sheet metal shears -mechanical guillotine shears Hsdpjy Tyqvofx Akzen -Cutting width: 1130 mm -Max. cutting thickness: 4.0 mm -Features: Back fence, side fence, 3 supports -Drive: 2.2 kW -Protrusion: 115 mm -Installation dimensions: 2620/1685/H1365 mm -Transport dimensions: 1215/1685/H1365 mm -Weight: 1250 kg

Year of construction: 2024, condition: new, Everything is configurable on demand, very short production & delivery time. We will be happy to provide you with further information on request. Technical data on request. Standard equipment: welded steel construction DURMA CNC control unit (AURORA) Remote control diagnostics (Ethernet) Lantek Software W / Automatic Nesting Hodpfx Aefirx Njkzjn Position determination of the sheet metal to be cut by laser DURMA Burner height control Double-sided drive system (rack and pinion) AC servo motors for X and Y axis movement CNC control outputs/inputs for the filter unit Consumables Starter-Kit Plasma torch * Ignition console * Burner height regulation with Ball screws on double Linear bearings * Special equipment: Hypertherm Max Pro 200 + hose package + nozzles + Durma THC + torch Hypertherm HPR 130 XD + hose package+ nozzles + Durma THC + ignition console + burner Hypertherm HPR 260 XD + hose package+ nozzles + Durma THC + ignition console + burner Hypertherm + Hypertherm HPR 400 XD + hose package + nozzles + Durma THC + ignition console + burner CE Standard Safety wire Automatic gas console for Hypertherm, Manual gas console for Hypertherm, Autogenous cutting torches Plasma torch protection system manual plasma angle cutting head, CNC angle cutting head (+/- 45). Single drilling head Multiple drilling head Filter for 130A, 260A or 400A Pipe cutting unit Ø50 mm - Ø400 mm Additional support for the pipe cutting unit Warning lamp for error and program end With over 60 years of experience

Condition: new, Year of construction: 2024, Everything is configurable on demand, very short production & delivery time. We will be happy to provide you with further information on request. Technical data on request. Standard equipment: welded steel construction DURMA CNC control unit (AURORA) Remote control diagnostics (Ethernet) Lantek Software W / Automatic Nesting Position determination of the sheet metal to be cut by laser DURMA Burner height control Double-sided drive system (rack and pinion) AC servo motors for X and Y axis movement CNC control outputs/inputs for the filter unit Consumables Starter-Kit Plasma torch * Ignition console * Burner height regulation with Ball screws on double Linear bearings * Special equipment: Hypertherm Max Pro 200 + hose package + nozzles + Durma THC + torch Hypertherm HPR 130 XD + hose package+ nozzles + Durma THC + ignition console + burner Hypertherm HPR 260 XD + hose package+ nozzles + Durma THC + ignition console + burner Hypertherm + Hypertherm HPR 400 XD + hose package + nozzles + Durma THC + ignition console + burner CE Standard Safety wire Automatic gas console for Hypertherm, Manual gas console for Hypertherm, Autogenous cutting torches Plasma torch protection system manual plasma angle cutting head, CNC angle cutting head (+/- 45). Single drilling head Hedjfiqgrepfx Akzen Multiple drilling head Filter for 130A, 260A or 400A Pipe cutting unit Ø50 mm - Ø400 mm Additional support for the pipe cutting unit Warning lamp for error and program end With over 60 years of experience

Condition: new, Year of construction: 2024, Everything is configurable on demand, very short production & delivery time. We will be happy to provide you with further information on request. Technical data on request. Standard equipment: welded steel construction DURMA CNC control unit (AURORA) Remote control diagnostics (Ethernet) Lantek Software W / Automatic Nesting Position determination of the sheet metal to be cut by laser DURMA Burner height control Double-sided drive system (rack and pinion) AC servo motors for X and Y axis movement CNC control outputs/inputs for the filter unit Consumables Starter-Kit Plasma torch * Ignition console * Burner height regulation with Ball screws on double Linear bearings * Special equipment: Hypertherm Max Pro 200 + hose package + nozzles + Durma THC + torch Hypertherm HPR 130 XD + hose package+ nozzles + Durma THC + ignition console + burner Hypertherm HPR 260 XD + hose package+ nozzles + Durma THC + ignition console + burner Hypertherm + Hypertherm HPR 400 XD + hose package + nozzles + Durma THC + ignition console + burner CE Standard Safety wire Automatic gas console for Hypertherm, Manual gas console for Hypertherm, Autogenous cutting torches Plasma torch protection system manual plasma angle cutting head, CNC angle cutting head (+/- 45). Single drilling head Multiple drilling head Filter for 130A, 260A or 400A Pipe cutting unit Ø50 mm - Ø400 mm Additional support for the pipe cutting unit Hsdjfirx Tjpfx Akzsn Warning lamp for error and program end D9hnyc97o With over 60 Yes

Year of construction: 2024, condition: new, Machine dimensions: - (L x W x H) 5,240 mm x 3,600 mm x 2,400 mm, - Width with console: 7,700 mm. - Length with filter: 11,000 mm Technical details: - Max. sheet size: 4.000 x 2.000 mm - cutting speed: 12 m/min. - positioning accuracy: ± 0,1 mm - Repeat accuracy: ± 0.1 mm - Power (Hypertherm XPR 170 XD Optimix): 170 A - Cutting area: - Unalloyed steel, piercing, argon: 40 mm - Unalloyed steel, piercing, air: 35 mm - Unalloyed steel, separation cut: 60 mm - Alloy steel, hole piercing: 22 mm - Alloy steel, cut-off: 38 mm - aluminium, hole piercing: 25 mm - aluminium, separation cut: 38 mm Basic equipment: - Control: Durma Aurora CNC controller - Truehole Standard - Sheet metal measurement by laser - Burner height control Hedpfedyfwkox Akzsn - AC servo motors for X and Y axis - Software: Lantek, or Metalix Cad/Cam software with Autonesting - 50 pre-programmed part geometries for easy and quick modification. - consumption kit (burner nozzles, etc.) - Plasma torch - ignition console - Remote - Control: Remote maintenance options are included: - Hypertherm XPR 170 XD + Optimix + automatic gas control - Filter for HPR 170 XD - Safety system with circumferential safety wire - Oxyfuel torch with sensor - Plasma torch - demolition system - Air dryer

Condition: good (used), Iijima’s excellent, high-speed JF-1030, manufactured in 1991, modified for Bobst die-cutting tools. Machine number 8061 Year of manufacture: 1991 Die-cutting unit adapted to be compatible with/for Bobst die-cutting blades and mounting strips. Sector segment driven by a dual set of bevel gears instead of the previous triple system. Smoother and vibration-free, improved operation of the gripper carriages. Chains renewed in May 2023. Gripper carriages have been repaired where necessary, but not replaced; current tolerance on front registration for rigid cardboard types < 0.15 mm. Engagement clutch (electric 24 VDC, Warner) replaced in May 2023, as well as all rolling bearings on this shaft, including those in the oil casing just before and after the worm gear. Hodpfxsx Ndu Ds Akzen Oil seals replaced. Oil casings flushed and thoroughly cleaned in preparation for conversion from mineral oil to full synthetic oil. Absolutely no foaming, quieter operation. Decommissioned on 23/12/2025; available for sale ex-warehouse Van Rooij from that date. For the end user: can be supplied including installation, transport, and warranty. Other specifications as per the factory brochure. Technical Specifications – Flatbed Die Cutting Machine Materials • Paper from 80 g/m² • Solid fibre board / cardboard up to 2000 g/m² • Corrugated board up to 4 mm, depending on material quality and cutting layout ⸻ Sheet Sizes & Formats • Maximum sheet size: 750 × 1050 mm • Minimum sheet size: 350 × 400 mm • Maximum cutting form size: 745 × 1070 mm • Maximum cutting surface: 730 × 1030 mm • Inside chase dimension: 750 × 1050 mm ⸻ Performance • Maximum cutting pressure: when running max. sheet size • Maximum speed: up to 8,500 sheets/hour • Gripper margin: adjustable • Normal cutting rule height: 8 – 12 mm ⸻ Pile Data Feeder pile • Height (incl. pallet): 1,200 mm • Weight (incl. pallet): 1,000 kg Delivery pile • Height (incl. pallet): 1,080 mm • Weight (incl. pallet): 1,000 kg Auxiliary piles • Feeder auxiliary pile height: 450 mm • Feeder auxiliary pile weight: 450 kg • Delivery auxiliary pile height: 800 mm • Delivery auxiliary pile weight: 800 kg ⸻ Machine Dimensions & Weight • Length without feeder: 4,540 mm • Length with feeder: 5,810 mm • Width: 2,350 mm • Height: 2,100 mm • Weight of machine: 15,000 kg • Weight of feeder: 1,000 kg ⸻ Electrical & Air Requirements • Power supply: 3-phase AC • Main motor output: 15 kW • Connected load of machine: 32.4 kVA • Compressed air required: 6 bar • Air intake volume requirement: approx. 30–50 l/min ⸻ Additional Information • Heavy-duty industrial construction • Designed for continuous professional die-cutting production • Specifications subject to alteration

Year of construction: 2026, condition: new, Flexible cut to length lines for standard and mid-range production needs with customized capacity and width options. Bosporas Machinery is a manufacturer of coil processing lines, delivering high-performance and customized industrial solutions worldwide. Our standard and mid-range cut to length lines are designed for precise sheet production from coil with reliable performance, stable operation and flexible configurations. These systems are ideal for manufacturers looking for efficient solutions for medium gauge sheet processing. Available in different capacities and working ranges, the lines can be customized according to customer production targets, material specifications and factory layout requirements. Whether for new investments or production upgrades, Bosporas provides complete turnkey cut to length solutions with international project experience. Hedpfx Akoy Dug Hjzen ⚙️ AVAILABLE CONFIGURATIONS 2 mm | 1300 mm | 4 Ton Cut to Length Line 3 mm | 1500 mm | 15 Ton Cut to Length Line Custom capacities, widths and thickness ranges are available upon request. 📊 TECHNICAL RANGE Material Thickness: 2 – 3 mm Coil Width: 1300 - 1500 mm Coil Weight: 4 Ton – 15 Ton High precision sheet length cutting Stable continuous production performance 🔧 MAIN LINE COMPONENTS Depending on project requirements, the line may include: Hydraulic or Mechanical Decoiler Straightener / Leveler Unit Servo Feeding System Guillotine / Rotary / Hydraulic / Eccentric Mechanical Shear Conveyor Systems Automatic Stacking System Exit Table PLC & HMI Control System ⚙️ ENGINEERING FEATURES High cutting accuracy and repeatability Stable sheet flatness performance Heavy-duty machine construction Servo controlled feeding systems User-friendly automation interface Modular design for future upgrades Designed for industrial continuous operation ⚡ OPERATIONAL ADVANTAGES Flexible production for different sheet sizes Consistent cut quality Reduced labor and handling time Efficient material processing Turnkey project solutions Short lead time compared to European manufacturers 🏭 APPLICATION AREAS Steel service centers Sheet metal distributors Construction materials production HVAC manufacturers White goods industry General metal processing companies 📸 REFERENCE PROJECTS Images included in this listing show reference installations of similar cut to length lines successfully manufactured and commissioned in different countries. These references demonstrate our proven engineering capability and international project experience. Additional references, layout drawings and technical details can be provided upon request.

Condition: good (used), Year of construction: 1992, Sheet metal shears, tin scissors, sheet metal scissors, hydraulic shears -Sheet shear: hydraulic -Cutting width: 2000 mm Hjdpfxjywzbds Akzon -Max. cutting thickness: steel 6 mm -Features: Back gauge, cutting gap adjustment -Space requirement: 3280/2700/H2060 mm -Transport dimensions: 2280/2700/H2060 mm -Weight: 5980 kg

Condition: excellent (used), Year of construction: 2018, LARA CDCH-1400 SHEAR (year 2018) With discharge table. Hydraulic shear designed for cross-cutting strip material and managing scrap in coil feed lines. Supplied together with a discharge table, allowing for convenient and safe evacuation of cut material while maintaining a clean and continuous production process. Robust equipment with heavy-duty industrial construction, especially suited as an auxiliary component for cutting, stamping, or coil-feeding lines. Main Features • Hydraulic cross-cut shear • Hydraulic drive • Robust design for continuous operation • Clean and precise cutting of metal strip • Integrated discharge table • Facilitates evacuation of scrap and off-cuts • Improves ergonomics and orderliness on the line • Keeps the work area clear Hodsy Edlhepfx Akzon • Heavy-duty industrial construction • Rigid and stable frame • Designed to be integrated at the same height as the LARA feeder/straightener • Easy integration into existing lines • Safety system • Integrated into the line control system • Designed in compliance with CE standards Work Materials • Carbon steel • Stainless steel • Aluminum and light alloys Main Technical Data • Maximum working width: up to 1,400 mm • Type of drive: hydraulic • Working pressure: 4–6 bar (pneumatic control system) • Power supply: 400 V / 50 Hz

Condition: good (used), Double bench grinder, double grinding machine, pedestal grinder, bench grinder, belt grinder, belt sander, edge grinder, edge grinding machine -Belt sander: Manufacturer Grit, sanding belt 75 x 2000 mm -Motor: Teknodan 3 kW 2850 rpm -Grinding bench: Manufacturer Flott, double grinding bench type 702 1 /2/200 x 32 x 51 Hodpfxeydi A Ie Akzon -Grinding discs: Ø 200 mm -Motor: AEG 0.6 kW 2800 rpm -Submission/Price: complete -Overall dimensions: 1000/900/H1685 mm -Total weight: 228 kg

Condition: new, Year of construction: 2025, Delivery ex works TR Cutting length: 3030 mm Hedpfx Akegu Nu Eozjn Sheet thickness (42kgf / mm): 8 mm Sheet thickness (70kgf / mm): 4 mm Cybelec Cybtouch 8 touchscreen CNC control All-steel welded construction Automatic cutting angle adjustment Automatic cutting gap adjustment Working table with roller balls Hold-down-system Hardened and grounded upper and lower blades with 4 cutting edges Foldable front finger guard (CE compliant) Adjustable cutting stroke length 1 meter angle stop on the left with scaling 1 meter front sheet metal supports (2 pieces) CE light curtain on the rear of the machine (900 mm) Cutting line lighting Bosch Rexroth or Hoerbiger / HAWE hydraulic system Bosch Rexroth or ECKERLE hydraulic pump SIEMENS / Schneider / ABB / Omron Electronic Components Documentation in German or English CE conformity

Condition: excellent (used), functionality: fully functional, 2 x aluminium silos with extended support ring + filter housing, ø 3,000 mm, designed for a specific gravity of 0.6 kg/dm³ Manufacturer: Zeppelin Capacity: approx. 80,000 litres Diameter: approx. 3,000 mm Total height: approx. 16,000 mm Weight: approx. 2,000 kg Design density: 0.6 kg/dm³ Connections and fittings: On top: 1 x crane eye Hedpfxjgh Dgbj Akzjn In filter housing: 1 x filter frame, approx. 900 x 1,000 mm, with aeration nozzle 1 x manhole DN 600 3 x connections for control/measurement technology (incl. silo pilot, min-max indicator, and additional measuring probe) On silo shell: 1 x access door with lock to filter housing 1 x access door (cone) 1 x signal light Various openings for filling pipes Silo ends in a 60° cone. The 2 silos are equipped with a dual-lane ladder system with rear safety cage.

Condition: used, Hydraulic Guillotine Shear STEINER Type HTS 30/20 R Machine No. 315 Year of manufacture: 1982 Cutting length: 3050 mm Cutting thickness: 20 mm Hsdpfx Aksd Hxx Ajzon Backgauge: 800 mm, motorized Motor power: approx. 30 kW Power supply: 400 Volts, 50 Hz - Backgauge with ELGO positioning control - Backgauge adjustment via ball screws - SICK safety light curtain at the front as reach-in protection - 3 material support arms with ball transfers - Electric foot switch - Spare blade - Oil cooler with air heat exchanger - Very robust machine with extremely solid construction Machine footprint (L x W x H): 4650 x 2610 x 3200 mm Machine weight: 27,000 kg Transport dimensions (base machine) (L x W x H): 4650 x 2610 x 3200 mm Transport dimensions (additional) (L x W x H): 3500 x 2450 x 1400 mm Total weight: 27,000 kg Good condition Machine can be inspected at our warehouse in 37235 Hessisch Lichtenau, test cuts possible. Currently, the hold-down devices are being resealed; the resulting price adjustment will be made in the coming days.

Condition: good (used), functionality: fully functional, Year of construction: 1998, sheet thickness (max.): 13 mm, sheet thickness steel (max.): 13 mm, back gauge: 1,000 mm, back gauge travel distance Z-axis: 1,000 mm, overall weight: 18,400 kg, total length: 4,400 mm, total width: 2,350 mm, total height: 2,250 mm, cutting length (max.): 4,100 mm, Equipment: finger protection, safety light barrier, Cuttinglength: 4.100 mm Cutting thickness: 13 mm Back gauge: 1.000 mm Control: Darley Delem Featured with: - Sheetsupporters frontside 4000 mm - Footpedal - Material conveyor - Extra sets knives - Documentation Hodjwc Sahopfx Akzen Country of origin: The Netherlands Motor power: 30 kW Machine LxWxH: 440 x 235 x 225 cm Machine weight: 18.400 kg

Condition: like new (used), Year of construction: 2025, operating hours: 32 h, functionality: fully functional, type of input current: three-phase, working range: 4,000 mm, sheet thickness steel (max.): 50 mm, overall weight: 3,000 kg, total width: 2,700 mm, total length: 5,000 mm, workpiece weight (max.): 5,000 kg, Equipment: documentation/manual, Demonstration machine with large spare wear parts package for sale. Cutting table 4x2m and 300A XPR High Definition water-cooled Hypertherm power source. Core Plus mixed-gas console. True Hole function bolt guarantee —> Hole diameter equals material thickness (e.g. 20mm hole in 20mm plate). Top cutting results thanks to HD cutting technology. Very reliable and extremely user-friendly machine. Remote access and operation via office PC or smartphone possible, CAM software on board. - only 26 cutting hours - Includes approx. €3,000 (net) worth of wear parts - Includes 3 quick-change heads, HD water-cooled, price per piece approx. €1,500 (net) - Piercing up to 50mm with Argon Assist - Cuts up to 80mm in mild steel - Includes comprehensive training at our premises - Dismantling and loading included - 4-year manufacturer’s warranty - New price: €135,000 (net) Hjdpfx Aeygczpokzsn Freight and installation available as separate offer.

Condition: good (used), Drying oven, drying cabinet, electrode oven, chamber dryer oven, preheating oven, electrode re-drying, electrode cabinet, electrode heat container -Manufacturer: Norweld, drying oven with isolation transformer -Type: ES 2 -Usable space: Ø 100 x 430 mm -Number: 2x drying ovens available -Price: per piece -Transport dimensions: 520/230/H560 mm Hsdpsyuvp Asfx Akzen -Weight: 14 kg/pc.

Condition: good (used), Drying oven, drying cabinet, electrode oven, chamber dryer oven, preheating oven, electrode re-drying, electrode cabinet, electrode heat container -Drying oven: with isolation transformer Hodpfx Akeyuut Hezen -Type: ES 2 -Technical data: unfortunately no longer legible -Usable space: Ø 100 x 430 mm -Transport dimensions: 520/230/H560 mm -Weight: 14 kg

Year of construction: 2003, condition: excellent (used), functionality: fully functional, strip width: max. 1.500 mm Hsdpfxorazyqe Akzsn strip thickness: 0,5 - 2 mm coil weight: max. 7 t mandrel Ø: 508 mm

Condition: used, Year of construction: 1979, Roundo plate/pipe roller. In recent years, it has primarily been used for rolling smoke pipes with a diameter of 150–160 mm. Four pallets with rollers are included; they are used to determine the pipe diameter. Using a pneumatic cylinder, the end is opened to remove the rolled pipe. I have tested the machine, but the rollers do not run. There is probably a simple solution for this. Machine and rollers weigh approximately 3–4 tons. Hodpfxjyvqc Us Akzon