Used Demag Dsm4 for sale (669)

Condition: excellent (used), Year of construction: 2015, year of last overhaul: 2025, Demag Systec 210-840 (2015) SERVO Manufacturer: Sumitomo SHI DEMAG Type of machine: Systec 210/580-840 Dkjdpfx Alezbg Eze Asu Clamping force [kN]: 2100 Shot volume [cm³]: 358 Clearance between tie bars hor. [mm]: 580 Clearance between tie bars vert. [mm]: 580 Mold height min. [mm]: 340 Mold height max. [mm]: 690 Opening stroke max. [mm]: 575 Daylight max. [mm]: 1365 Year of manufacture: 2015 Machine dimensions L/W/H [mm]: 6022 / 1556 / 2090 Control unit and software version: NC3 Max. weight of entire molding tool [kg]: 3300 Screw diameter [mm]: 45 Screw design: 3 zone Screw relation (length/diameter): 20:1 Screw back flow valve: Yes Ejector system type: Hydraulic Installed heating power [kW]: 39 No. of integrated hot runner circuits: 12 Number of temperature control electrical valves: 28 Number of cascade controls: 2 Connection to central drying system: Yes Unloading robot system available: Yes Number of tempering units: 3 Tempering units max. temperature [°C]: 160 Machine oil capacity [l]: 400 Net power of hydraulic pump engine [kW]: 26

Year of construction: 1985, condition: excellent (used), machine/vehicle number: 20020302 EG, DEMAG KBK crane canopy crane runway with dimensions approx. 16.5x6m (6m bridge) Payload / lifting capacity 500 KG - 0.5to Technical data of the system: Crane runway made of Demag KBK2 rails with internal power supply System is supplied complete: KBK rails, rail joiners, trolleys, end plates, cable carrier, brackets/hangers etc. incl. Demag PK2 500KG chain hoist - lifting height approx. 5m Crane is disassembled and immediately available Dedpfxety S Dyo Al Aeku Used condition, see pictures Item location is 75053 Gondelsheim Shipping by forwarding agent or collection by appointment only Demag KBK1 KBK2 and KBK3 tracks are stock items ! Other KBK installations are also in stock. Payload 125KG - 1600KG Please ask for your crane runway with load capacity and dimensions without obligation.

Year of construction: 1983, condition: excellent (used), machine/vehicle number: 20020233 UG 1 Brücke, DEMAG KBK crane canopy crane runway with dimensions approx. 29 x 6m (6m bridge - double girder crane) Payload / lifting capacity 1000 KG - 1to Technical data of the system: Crane runway made of Demag KBK2 rails with internal current routing System is supplied complete: KBK rails, rail joiners, trolleys, end plates, cable trailing, brackets/hangers etc. incl. Demag PK5 - 1000KG chain hoist - lifting height approx. 4m Crane is disassembled and immediately available Dkedpoty Tdbjfx Al Aou Used condition, see pictures Item location is 75053 Gondelsheim Shipping by forwarding agent or collection by appointment only Demag KBK1 KBK2 and KBK3 tracks are stock items ! Other KBK installations are also in stock. Payload 125KG - 1600KG Please ask for your crane runway with load capacity and dimensions without obligation.

Year of construction: 2001, condition: excellent (used), machine/vehicle number: BO834, DEMAG KBK crane canopy crane runway with dimensions approx. 18x6m (6m bridge) This crane is available several times ! Payload / lifting capacity 800 KG - 0,8to Technical data of the system: Crane runway made of Demag KBK2 rails System is supplied complete: KBK rails, rail connectors, trolleys, end plates, brackets/hangers etc. Crane is with internal power supply incl. 800KG Demag DK chain hoist - lifting height approx. 3m Crane is disassembled and immediately available Dkodpfx Alsupvyis Aou Used condition, see pictures Item location is 75053 Gondelsheim Shipping by forwarding agent or collection by appointment only Demag KBK1 KBK2 and KBK3 tracks are stock items ! Other KBK installations are also in stock. Payload 125KG - 1600KG Please ask for your crane runway with load capacity and dimensions without obligation.

Year of construction: 1972, condition: used, machine/vehicle number: WIT, Technical data: 1x Vetter / Demag column-mounted slewing jib crane NL 250KG with Demag chain hoist Payload at full radius 250KG / 0.25to payload Several cranes available (7 pieces) Height: approx. 3.75-4m Outreach: 3+3.9m Weight complete approx. 700KG incl. cable towing, undercarriage etc Swivel range 360°, connection to 400V 16A Optionally also available with 250KG chain hoist Crane is disassembled and immediately available Item location is 75053 Gondelsheim Further cranes are available, lifting capacity 80-5000Kg, please inquire See pictures Shipping by forwarding agent or collection by appointment only Dodpfx Aljrwkbus Ajku

Condition: like new (used), Year of construction: 2016, machine/vehicle number: DN-KR29, DEMAG KBK overhead crane, dimensions approximately 24 x 6 m Load capacity / lifting capacity: 1 x 500 kg - 0.5 tons Technical data of the system: Overhead crane track made of Demag KBK2 / KBKII-H / KBKII-H-R rails Height of steel structure: 4.52 m (bracing) Top of steel structure (purlin): 4.38 m Bottom of steel structure (purlin): 4.24 m Bottom of crane track: 3.84 m Bottom of bridge: 3.6 m Hook height: 3.1 m External dimensions of steel structure (space requirement): 24 x 6 m Support spacing: 8.7 + 7.5 + 8.2 m Dimensions of overhead crane track: approximately 25 x 5.3 m The system is delivered complete: KBK rails, rail connectors Carriages, end plates, cable carriers, supports/hangers, etc. + complete steel structure (HEA140/U140) Djdpfx Alezv E Dko Ajku including Abus GM 500 kg chain hoist The crane is disassembled and packed on a pallet. Item location: 75053 Gondelsheim Very good condition - almost new. See photos. Shipping by freight forwarder or collection only by prior arrangement. Demag KBK1, KBK2, and KBK3 rails are in stock!

Condition: excellent (used), functionality: fully functional, Year of construction: 1986, machine/vehicle number: MIKA400077, Technical data: 1 Zasche / Demag ZHD 500-8/4.5 pillar jib crane, rated load 500 kg Load capacity at full outreach: 500 kg / 0.5 tons Height: approx. 4.9 m, bottom edge of jib: approx. 4.5 m Jib outreach: approx. 8 m, hook height: approx. 4 m Overall weight: approx. 1200 kg Equipped with Demag PK chain hoist 500 kg Connection: 400V 16A, slewing range 360° Crane is dismantled and immediately available Location: 75053 Gondelsheim Only the crane system shown in the pictures is being sold Very good condition, see pictures Dksdpsxvmn Dsfx Al Aou Shipping by freight carrier or collection by appointment

Year of construction: 1985, condition: excellent (used), machine/vehicle number: 20020298 EG, DEMAG KBK crane canopy crane runway with dimensions approx. 10.5x9m (9m bridge - double girder crane) Payload / lifting capacity 500 KG - 0.5 tons Technical data of the system: Crane runway made of Demag KBK2 rails with internal power supply System is supplied complete: KBK rails, rail joiners, trolleys, end plates, cable carrier, brackets/hangers etc. incl. Demag PK2 500KG chain hoist - lifting height approx. 5m Crane is disassembled and immediately available Used condition, see pictures Item location is 75053 Gondelsheim Shipping by forwarding agent or collection by appointment only Demag KBK1 KBK2 and KBK3 tracks are stock items ! Other KBK installations are also in stock. Payload 125KG - 1600KG Please ask for your crane runway with load capacity and dimensions without obligation. Djdpfety S T Uex Al Aeku

Year of construction: 2001, condition: excellent (used), machine/vehicle number: 20020232 EG 1 Brücke, DEMAG KBK crane canopy crane runway with dimensions approx. 31 x 6m (6m bridge - double girder crane) Payload / lifting capacity 1000 KG - 1to Technical data of the system: Crane runway made of Demag KBK2 rails with internal current routing System is supplied complete: KBK rails, rail joiners, trolleys, end plates, cable trailing, brackets/hangers etc. incl. Demag DK5 - 1000KG chain hoist - lifting height approx. 4m Crane is disassembled and immediately available Used condition, see pictures Item location is 75053 Gondelsheim Shipping by forwarding agent or collection by appointment only Demag KBK1 KBK2 and KBK3 tracks are stock items ! Other KBK installations are also in stock. Payload 125KG - 1600KG Dkedpfjty Tcqex Al Aou Please ask for your crane runway with load capacity and dimensions without obligation.

Condition: excellent (used), Year of construction: 2006, clamping force: 500 kN, screw diameter: 22 mm, clearance between the columns: 355 mm, overall weight: 2,700 kg, Clamping force: 50 t Year of manufacture: 2006 Injection unit .../200 Screw diameter: 22 mm Specific injection pressure: 2800 bar Dkedpfx Aljzt Ih Ts Asu Injection volume: 41.8 ccm Mould clamping system 50/... Clamping force: 50 t Mould plate dimensions: 520 x 520 mm Tie bar clearance: 355 x 355 mm Mould height: 210 mm Opening stroke: 400 mm Maximum platen distance: 610 mm Weight: 2700 kg Dimensions (m) L x W x H: 3.8 x 1.1 x 2.1 m Control: NC4

Condition: excellent (used), Year of construction: 2005, functionality: fully functional, clamping force: 6,500 kN, screw diameter: 80 mm, clearance between the columns: 1,000 mm, displacement volume: 1,779 cm³, injection pressure: 1,855 bar, injection weight: 1,600 g, mold height (min.): 450 mm, ejector force: 96,000 N, ejector stroke: 300 mm, plate length: 1,450 mm, plate width: 1,350 mm, Clamping force: 650t Year of manufacture: 2005 Injection weight: 1600g Injection unit 3300 Screw diameter: 80 mm Screw L/D ratio: 20 Specific injection pressure: 1855 bar Injection volume: 1779 ccm Injection weight: 1600 g Mold closing system Clamping force: 650 t Mold plate dimensions: 1450 x 1350 mm Distance between columns: 1000 x 900 mm Mold height: 450 - 950 mm Opening stroke: 930 mm Maximum plate distance: 1880 mm Ejector force: 96 kN Ejector stroke: 300 mm Control system: NC4 Dkedpfx Aoz E Iq Ael Aju Equipment: - Hydraulic core pulls: 4 - Hydraulic cascades: 8 - Hot runner adjustment points (zones): 16 - Wittmann W 843 Pro robot, year 2021 (Z 3000 / Y 2000 / X 1200 mm, C-axis servo 180°, B-axis servo 270°) included

Condition: excellent (used), Year of construction: 1995, Demag Ergotech Compact 250-80 Year of manufacture: 1995 Injection unit: Screw diameter: 18 mm Injection weight: 20 g injection pressure: 2400 bar Dosing volume: 22.8 ccm Clamping unit: clamping force: 25 t tie bar distance: 280x280 mm size of clamping platens: 410x410 mm ejector: hydraulic clamping unit: hydraulic Control system: NC4 Additional equipment: Air valve x 2 Hydraulic core pull x 1 Dsdez Iqlbspfx Al Asku Injection unit hardened - bimetal Original Demag mold crane: chain, electrically controlled, 2 lifting speeds Dimensions: Weight: 2600 kg Length/width/height: 3.20x1.30x1.80 m Drive: Pumps/motor: 7,5 kW Heating power: 3,7 kW Total power: 11,2 kW All offered machines are started by our service technicians before sale. It is possible to get a video of technical tests of the selected machine or participate in live technical tests in our company in Łódź. Price: Upon request

Condition: used, functionality: fully functional, Year of construction: 1989, machine/vehicle number: ROD396, DEMAG KBK Crane Ceiling Crane Runway with dimensions approx. 19.5x7m (2x 7m bridge) Payload / Lifting Capacity: 2x 250 kg - 0.25 t Technical Data of the System: Runway made from Demag KBK2 rails, one side with KBKII-R rails featuring integrated power feed System is supplied complete: KBK rails, rail connectors, trolleys, end plates, brackets/hangers etc. Dkjdpfxexdvn Ao Al Aeu including 2 bridges, each 250 kg including 2x 250 kg Demag DC chain hoists Crane is dismantled and immediately available Used condition, see pictures Item location: 75053 Gondelsheim Shipping by freight carrier or collection only by appointment Demag KBK1, KBK2 and KBK3 rails are in stock! Other KBK systems available. Load capacities from 125 kg to 1600 kg Please inquire about your crane runway with required capacity and dimensions, non-binding.

Year of construction: 2014, condition: used, Clamping force: 100kN, tie-bar spacing: 470mm, mains connection: 400V/50Hz/64A, control: CDIAS, weight: 5.7t, an on-site inspection is possible. Dksdpfx Alsz Dkh Io Aeu

Year of construction: 1987, condition: excellent (used), machine/vehicle number: 20020231 EG 1 Brücke, DEMAG KBK crane canopy crane runway with dimensions approx. 35 x 6m (6m bridge - double girder crane) Payload / lifting capacity 1000 KG - 1to Djdpfx Aoty Tcwel Aeku Technical data of the system: Crane runway made of Demag KBK2 rails with internal current routing System is supplied complete: KBK rails, rail joiners, trolleys, end plates, cable trailing, brackets/hangers etc. incl. Demag PK5 - 1000KG chain hoist - lifting height approx. 4m Crane is disassembled and immediately available Used condition, see pictures Item location is 75053 Gondelsheim Shipping by forwarding agent or collection by appointment only Demag KBK1 KBK2 and KBK3 tracks are stock items ! Other KBK installations are also in stock. Payload 125KG - 1600KG Please ask for your crane runway with load capacity and dimensions without obligation.

Condition: excellent (used), functionality: fully functional, Year of construction: 2011, machine/vehicle number: CR-Lack, Demag Tandem Chain Hoist Crane Lifting Unit 2x 2500kg DC-Pro 16-2500 H6 V6/1.5 Load capacity 2x 2500kg / 2.5t load capacity / lifting capacity - 2-strand - total lifting capacity 5000kg - 5t 7x DC double chain hoists available!!! 5x DK double chain hoists available!!! with articulated trolley drive, chassis prepared for mounting on approx. HEA/HEB/HEM beams (flange width 300mm) with 2 lifting speeds, lifting height 6m!!! incl. HBC radio remote control Dkedpjzh U Nysfx Al Aju Length of the lifting unit approx. 2.5m Total weight approx. 600 kg, connection to 400V 50Hz Very good condition, fully functional Item location is 75053 Gondelsheim See pictures

Condition: excellent (used), functionality: fully functional, Year of construction: 1986, machine/vehicle number: MIKA195, Technical specifications: 1x Demag KBK 1 slewing pillar crane, NL 125KG Load capacity at full outreach: 125KG Height: approx. 3.5m Upper carriage outreach: approx. 3.05m Outreach: 2.5m Hook height: approx. 2.65m Total weight: approx. 350Kg with Demag PK chain hoist, 125Kg incl. bolts, cable carrier, trolley, end cap, etc. Slewing range: 300°, connection to 400V, 16A The crane is disassembled and immediately available. The item is located in 75053 Gondelsheim. Other cranes are available, with load capacities from 80-5000Kg. Please inquire. See images. Dodpfozv H U Rjx Al Ajku Shipping via freight forwarder or collection only by prior arrangement.

Condition: excellent (used), functionality: fully functional, Year of construction: 1989, machine/vehicle number: WB-Res, DEMAG KBK overhead crane system, span approximately 11x7m – extension possible! Load capacity / lifting capacity 1000 KG - 1 ton Technical data of the system: Crane track made of Demag KBK2 rails The system is delivered complete: Dksdpfx Aezxa Rwsl Asu KBK rails, rail connectors, running gears, end plates, cable carriers, supports/hangers, etc. including power supply in the bridge! including Demag PK5 1000KG chain hoist Crane is disassembled and immediately available Several bridges with spans from 5-8m are available, please inquire about the required dimensions (length and width)! Available load capacities: 500, 700, 800, 1000 KG Very good condition, see pictures Item location is 75053 Gondelsheim Shipping by freight forwarder or collection by appointment only Demag KBK1, KBK2 and KBK3 rails are in stock! Other KBK systems are also in stock. Load capacity 125KG - 1600KG Please inquire about your overhead crane system with the required load capacity and dimensions.

Year of construction: 1989, condition: good (used), machine/vehicle number: TH2000/9953, DEMAG KBK crane canopy crane runway with dimensions approx. 9x4m (4m bridge) There are multiple copies of this crane! Payload / lifting capacity 500 KG - 0.5 tonnes Technical data of the system: Crane runway made of Demag KBK2 rails Dodpfsv Iakaox Al Aoku System is delivered complete: KBK rails, rail connectors, chassis, end plates, brackets/hangers etc. Incl. 500Kg steel chain hoist - lifting height approx. 3.5m Crane is dismantled and immediately available Used condition, see pictures Item location is 75053 Gondelsheim Shipping by freight forwarder or collection only by appointment Demag KBK1 KBK2 and KBK3 rails are in stock! Other KBK systems are also in stock. Payload 125KG - 1600KG Please enquire about your crane runway with load capacity and dimensions without obligation.

Condition: ready for operation (used), Year of construction: 2015, operating hours: 41,610 h, clamping force: 4,118 kN, screw diameter: 70 mm, Hydraulic injection moulding machine manufactured in 2015. This DEMAG D 420 features a clamping force of 420 t and an injection weight of 1100 g. It includes a handling system with impressive working strokes of Z=2500 mm, Y=1600 mm, and X=900 mm. If you are looking to get high-quality injection moulding capabilities, consider the DEMAG D 420 machine we have for sale. Contact us for further details regarding this machine. Dkedez E Hhyjpfx Al Aju - Control Unit: NC 5- Injection Weight: 1,100 g- Core Pulls (Hydraulic): 4- Hydraulic Cascades: 4- Hot Runner Zones: 40- Handling System / Robot: Wittmann DR 832 0989 (YOM 2015)- Robot Linear Axes: Z=2500 mm (Horizontal), Y=1600 mm (Vertical), X=900 mm (Demolding)- Robot Servo Wrist Axes: C-Axis servo 180°, B-Axis servo 270°

Condition: excellent (used), Year of construction: 2014, Clamping force: 650 t Screw diameter: 60 mm Injection volume: 891 cm3 Shot weight: 810 g Distance between tie bars V: 1020 mm Distance between tie bars H: 1020 mm Platten dimensions H x V: 1450 x 1470 mm Max. oppening stroke: 930 mm Min Mould installation height: 450 mm Type: Horizontal Drive: Hydraulic \+ Cooling water flow controller (2x 6 circuits) \+ Robot Sepro SR SDR5X35 HL S5 TRANS (2014) Hot Runners 1. 24-zone integrated hot runner controller (ZE 273) 2. 32-zone integrated hot runner controller on fixed platen (ZE 274), extended to 36 zones (SO 10) 3. Pneumatic needle valve nozzle control, 1× 5/2-way valve (ZE 276) 4. Hot runner connector upgrade for 24 zones (SO 01) 5. Total: 60 zones across two controllers Dsdpoyzylvofx Al Aoku Equipment Highlights Injection 1. Electric screw drive, frequency-controlled (WA 313) 2. High-speed injection with central accumulator, servo-valve controlled (WA 361 + SO 12) 3. 4-fold pneumatic cascade injection + Gammaflux cascade interface (SO 05 + SO 08) Quality & Process Monitoring 1. Priamus cavity pressure measurement + BlueLine integration (SO 02 + SO 04) 2. Holding pressure switchover with peak value capture and recording (ZE 350) 3. 100% process data recording (PDE) with statistics and graphics (ZE 420) Mold & Core Pulls 1. 4 core pull circuits via proportional valves, flow-independent (ZE 234 + ZE 237) 2. Electric pressure relief for core pulls (SO 27) 3. Separate pneumatic hot runner needle (SO 04x) Quick Mold Clamping 1. Full quick-clamp system — interface, power supply, installation & testing (SO 23a–d) Connectivity & Automation 1. OPC/UA interface for host systems (SO 5631) 2. WC5 World Connect — remote access and service (ZE 571) 3. Integrated BDE/PDE production data management (ZE 471 + ZE 420) 4. Demag robot interface via CAN bus (ZE 752) Energy & Infrastructure 1. Integrated energy monitoring with per-part cost calculation (ZE 4921) 2. Elastic machine mounting / vibration isolation (WA 180) \+ 2x Magnetic platten

Condition: excellent (used), functionality: fully functional, Year of construction: 2016, machine/vehicle number: CR-16/994882, Demag EPKE-O bridge crane, hall crane, crane, crane gantry, crane runway Load capacity / lifting capacity 3.2 - 3200 kg Gauge approx. 17000 mm, overall dimension approx. 17200 mm Demag DR-COM wire rope hoist 3200 kg (EKDMR 3) Lifting height 10 m with floor control and fine positioning Overall height from top of crane to hook approx. 1100 mm Head beam length with buffer approx. 2.8 m Crane is dismantled and available immediately Djdszh Uylspfx Al Asku Very good, used condition Column-mounted swivel cranes and wall-mounted swivel cranes are also available Demag KBK and Abus HB systems, as well as Errikla, Hadef, Stahl KT 2000, etc. Shipping via freight forwarder is possible, please inquire with your postal code Collection is preferred

Condition: used, Year of construction: 1998, CLAMPING UNIT Clamping force: 2000 kN Locking force: 2200 kN Max. opening stroke: 575 mm Min. mould height: 310 mm Max. mould height: 660 mm (760 mm with WA) Max. distance between platens: 1235 mm (1335 mm with WA) Platen size (H x V): 830 x 830 mm Distance between tie bars (H x V): 560 x 560 mm Max. mould weight: 2500 kg Max. mould weight on moving platen: 1700 kg HYDRAULIC EJECTOR Ejector stroke: 180 mm Ejector force: 80 kN Ejector retraction force: 35 kN INJECTION UNIT (840) Screw diameter: 50 mm Dsdpoz D U Rmofx Al Asku L/D ratio: 20 Injection pressure: 1946 bar Stroke volume: 442 cm³ Shot weight (PS): 400 g Max. dosing stroke: 225 mm Max. nozzle stroke: 400 mm Nozzle penetration depth: 40 mm (30 mm with SPI) Nozzle contact force: 80 kN Barrel heating power: 14.8 kW Electric screw drive (WA): 20.5 kW Hopper capacity: 70 l

Condition: not inspected (used), functionality: unexamined, Year of construction: 2007, total length: 18,000 mm, total width: 6,000 mm, load capacity: 500 kg, main lifting speed: 8 mm/min, working height: 4 mm, For sale is a used DEMAG KBK lightweight crane system, including an electric chain hoist, electric traveling unit, control panel, and extensive original accessories. The system was professionally disassembled and stored in a dry environment. It is ideally suited for workshops, assembly areas, production facilities, maintenance, or logistics. Technical data Dodpozwt Tcefx Al Aeku Manufacturer: DEMAG System: KBK lightweight crane system Load capacity: 500 kg Crane span: approx. 18.9 m Span: approx. 6 m Lifting height: 4 m Lifting speed: 8 / 2 m/min Electric chain hoist with electric traveling unit Voltage: 400 V Protection class: IP55 Year of manufacture of chain hoist: approx. 2007 Scope of delivery DEMAG electric chain hoist 500 kg Electric traveling unit Pendant control DEMAG KBK crane rail approx. 18 m x 6 m Trolley Rail connectors Suspensions Connecting elements Original mounting material Additional accessories as shown in the photos Condition Used Disassembled and stored Visually in good overall condition Sold as is Advantages ✅ Original DEMAG quality ✅ Extensive accessory package included ✅ Compact lightweight crane system ✅ Quick assembly possible ✅ Ideal for production and assembly areas Inspection Inspection is possible by appointment in Waiblingen. Please note that the sale of the lightweight crane system is only possible under the following conditions: • Sale exclusively to end users/manufacturing companies (no resale to dealers) – corresponding company profile required • Sale only within Germany Sales / Transfer conditions: • Disassembly, removal and transport are the responsibility of the buyer and at his own risk. • The buyer is responsible for providing personnel, tools and transport equipment. The personnel may only work with appropriate personal protective equipment, and only trained personnel may be used.

Year of construction: 1992, condition: like new (used), machine/vehicle number: Div1, Technical data: 1x Demag KBK 1 pillar slewing crane NL 125KG with chain hoist Payload at full radius 125KG / 0.125to payload Height: about 3.5m UK outrigger: approx. 3m Outreach: approx. 4m Hook height: approx. 2.55m Weight complete approx. 450 kg with steel or Demag chain hoist 125 kg depending on stock incl. bolts, drag cable, chassis, end cap etc. Various cranes are available Swivel range 300°, connection to 400V 16A Crane is dismantled and available immediately Dkjdpsng H T Uofx Al Aju Item location is 75053 Gondelsheim There are other cranes available, load capacity 80-5000 kg, please inquire See pictures Dispatch by forwarding agent or pick-up only by appointment