Tube End Closing Machines (Tube Sealing / Roll Closing)

What a tube end closing machine does

A tube end closing machine (also called a tube sealing, roll closing, end forming or spinning machine) closes the open end of a metal tube at room temperature with forming rollers, producing a one-piece dome end or a dome with a center hole of specified diameter. No heating, no welding, no plastic plug; the wall thickens at the closure and the surface is smooth enough to plate or coat directly.

Choosing a model

ModelFeaturesBest for
TD-31040 hydraulic 3-stationThree stations cycling in turn, Ø10–40 mm, quick changeoverVolume production of gas springs, shock absorbers, furniture and heat exchanger tubes; the most widely used model
TD-31050 hydraulic 3-stationLarger-diameter version of TD-31040Shock absorbers and larger tubes
TD-382 NC servoServo slide with programmed closing pathTorsion beams, stabilizer bars and parts with demanding or varied end shapes
TD-351 2-stationTwo-station hydraulicMedium-volume gas lift cylinders
TD-311 auto-feed single stationAutomatic feedingSingle-size lines where loading labor must be cut
TD-21025 flat typeFlat closed end instead of domeHeat pipes, strollers and furniture tubing that need a flat end face

Closing machines by industry

IndustryMachine pages
Gas springs, gas lifts and tailgate strutsTD-31040 gas spring, TD-351, TD-311 auto-feed
Shock absorbers and hydraulic cylindersTD-31050, TD-382 large cylinders
Stabilizer bars and torsion beamsTD-382 NC servo
Heat pipes and heat exchangersTD-31040 heat exchanger, TD-21025 flat type
Airbag inflator tubesTD-31040 airbag
Furniture, strollers and outdoor chairsTD-31040 furniture, TD-21025 flat type
Many part numbers in small batchesTD-382 mixed-model

Tube materials

Carbon steel, stainless steel, copper and aluminum with good ductility; welded tube needs a sound seam. OD and wall ranges vary by model; see each model page.

How to check fit

Send tube OD × wall × material × length and the closed-end drawing. TONG DA recommends a model and trial-closes your tubes before you decide between buying a machine and subcontracting. Closing machines built in Taiwan since 1989, CE certified, sold to the USA, Germany, Turkey, the UK, India, China and other countries.

Other names by market

USA / UK / India: tube end closing machine, tube closing machine, pipe end closing machine, tube sealing machine, pipe sealing machine, tube end sealing machine, roll closing machine, roll closure machine, tube spinning machine, spin closing machine. Turkey: boru ucu kapama makinesi, boru kapatma makinesi, boru ağzı kapama makinesi, boru sıvama makinesi. Brazil: máquina de fechamento de tubos, máquina de fechar ponta de tubo, máquina de repuxo de tubos, repuxadeira de tubos. Spain / Mexico: máquina cerradora de tubos, máquina de cierre de tubos, máquina de repulsado de tubos. China: 封口机、管端封口机、旋压封口机、热旋压封口机、旋压机. Taiwan: 封管機、封口機、金屬封管機、管端封口機、管端成型機.

TD-382 NC Closing Machine for Large Shock Absorber Cylinders and Hydraulic Cylinder Tubes
TD-382 NC Closing Machine for Large Shock Absorber Cylinders and Hydraulic Cylinder Tubes
Large shock absorber cylinders and hydraulic or pneumatic cylinder tubes need heavy-wall, pressure-tight closed ends, often with a center hole for the rod or a flat face for mounting. The TD-382 NC servo closing machine cold roll-forms large-diameter heavy-wall tube in programmed stages into a one-piece closed end; hole diameter, flat size and dome radius are program parameters set freely by the servo X/Y axes, so one machine runs different bores and different end shapes.
Heat Pipe & Heat Exchanger Tube End Closing Machines | Copper, Stainless, Header and Coil Tubes – Flat, Dome or Holed Ends
Heat Pipe & Heat Exchanger Tube End Closing Machines | Copper, Stainless, Header and Coil Tubes – Flat, Dome or Holed Ends
End closing machines for heat pipes, heat exchanger tubes, headers and manifolds, condenser and coil tubes and heater tubes: TD-21025 flat ends, TD-31040 / TD-31050 dome ends, TD-382 for thick wall and programmable shapes. Cold spin closing in one piece, no weld, no plug, no oxide scale. Samples on your tube first.
TD-31040 Outdoor & Aluminium Furniture Tube Closing Machine | Rattan, Garden and Patio Furniture Tube Ends
TD-31040 Outdoor & Aluminium Furniture Tube Closing Machine | Rattan, Garden and Patio Furniture Tube Ends
Tube end closing for garden chairs, loungers, parasol frames and rattan sofas: the aluminium or steel tube end is cold-spun into a one-piece dome with no welding and no heat. No plug to fall out, no water inside the tube; a center hole can be left for drainage or feet. OD 10–40 mm.
TD-382 NC Servo Closing Machine for Hollow Stabilizer Bars | Also Closes Large Shock Absorber Cylinders
TD-382 NC Servo Closing Machine for Hollow Stabilizer Bars | Also Closes Large Shock Absorber Cylinders
TD-382 NC servo closing machine for the tube ends of hollow automotive stabilizer bars (anti-roll bars). The forming roller is driven by servo X and Y axes and the dome radius is set freely in the program, so large-diameter, heavy-wall tube is cold spin-closed with no heating and no weld seam. It is used for stabilizer bar production in a Japanese automotive parts supply chain, and the same machine also closes large shock absorber cylinders.
TD-21025 Furniture & Chair Tube Flat-End Closing Machine | Replaces Plastic End Plugs
TD-21025 Furniture & Chair Tube Flat-End Closing Machine | Replaces Plastic End Plugs
TD-21025 hydraulic flat-end closing machine for furniture, chair, stroller and outdoor chair tubes. Tube OD Ø10–25 mm; the end is cold spin-closed flat, replacing plastic plugs and welding, with a smooth end that does not scratch.
TD-21025 Heat Pipe & Copper Tube Flat-End Closing Machine
TD-21025 Heat Pipe & Copper Tube Flat-End Closing Machine
TD-21025 hydraulic flat-end closing machine for heat pipes, copper tubes and heat exchanger tubes. Tube OD Ø10–25 mm; the end is cold spin-closed flat or with a hole, with no heating, welding or plug.
TD-31050 Heat Exchanger & Header Tube Closing Machine | Large-Diameter Steel, Stainless & Copper Tube Ends
TD-31050 Heat Exchanger & Header Tube Closing Machine | Large-Diameter Steel, Stainless & Copper Tube Ends
TD-31050 hydraulic dome-type closing machine for heat exchanger, header, condenser and coil tubes. Tube OD Ø15–50 mm; the end is cold spin-closed in one piece, with no welded cap or plug, no heating and no oxide scale.
TD-31050 Stabilizer Bar & Torsion Bar Tube Closing Machine | Hollow Tube End Spin Closing
TD-31050 Stabilizer Bar & Torsion Bar Tube Closing Machine | Hollow Tube End Spin Closing
TD-31050 hydraulic dome-type closing machine for hollow stabilizer bars, torsion bars and torsion beam tubes. Tube OD Ø15–50 mm; the tube end is cold spin-closed in one piece, with no heating, welding or plug, and no weld seam at the closure.
TD-31040 Airbag Tube Closing Machine | Inflator Housing Tube End Closing
TD-31040 Airbag Tube Closing Machine | Inflator Housing Tube End Closing
TD-31040 closes the tube ends of automotive airbag components such as inflator housings and gas storage tubes. The tube end is spin-formed cold into a one-piece closed end, with no weld and no plug, and the wall thickens naturally at the closure. Range Ø10–40 mm, wall 0.8–2.0 mm; other sizes evaluated by sample.
TD-382 NC Closing Machine for Mixed-Model Tube Shops | Many End Shapes on One Machine
TD-382 NC Closing Machine for Mixed-Model Tube Shops | Many End Shapes on One Machine
Tube shops and contract processors face a different closed-end shape on every order: another radius, another flat, a hole or no hole. A hydraulic closing machine can adjust the dome radius too and is best for fixed parts in high volume; when shapes keep changing, an NC servo machine is easier. The TD-382 NC servo closing machine keeps the end shape in a program: recall a program to change customer, change the jaw set and guide tube only when the OD changes, and take on many more parts with one machine.
TD-351 (TD-31050) Two-Station Hydraulic Tube Sealing Machine | Gas Spring & Gas Lift Tube End Closing
TD-351 (TD-31050) Two-Station Hydraulic Tube Sealing Machine | Gas Spring & Gas Lift Tube End Closing
TD-351 (also called TD-31050) is a two-station (OD Ø15–50 mm) hydraulic tube sealing machine for gas lift and gas spring cylinders: it cold roll-spins the tube end closed or with a center hole, two stations in turn, one operator, no heat, weld or plug.
TD-31040 Gas Spring Production Line Machine | Tailgate Strut & Shock Absorber Cylinder Closing
TD-31040 Gas Spring Production Line Machine | Tailgate Strut & Shock Absorber Cylinder Closing
TD-31040 closes the bottom end of gas spring, gas lift, tailgate strut and shock absorber cylinders by cold roll spinning: a fully sealed dome, or a dome with a center hole for the rod or end fitting. No welding, no plug. Typical cylinders are Ø12–28 mm cold-drawn precision steel tube; the machine covers Ø10–40 mm. TONG DA also supplies the inner grooving machine (TD-627 / TD-61530), component pressing and edge folding machine (TD-AT155), lock nut machine (TD-91528) and edge folding/punching machine (TD-738), so a complete gas spring cylinder line can come from one supplier.
TD-31040 Pipe End Closing Machine | Tube Spinning & Roll Closing, Hydraulic 3-Station
TD-31040 Pipe End Closing Machine | Tube Spinning & Roll Closing, Hydraulic 3-Station
Pipe end closing machine / tube spinning machine for gas spring, tailgate strut and shock absorber manufacturers. TD-31040 is TONG DA’s patented hydraulic 3-station tube end closing machine. It cold-forms the open end of a metal tube into a fully closed dome, or a dome with a center hole of specified diameter, by roll spinning. No heating, no welding, no plastic plugs. Tube OD 10–40 mm, wall 0.8–2.0 mm, in carbon steel, stainless steel, copper and aluminum. Three stations cycle in turn, so one operator runs the machine without special skill. Typical products: gas spring and tailgate strut cylinders, shock absorber tubes, heat exchanger tubes, furniture and stroller frames.
TD-382 Stabilizer Bar Closing Machine | NC Servo Pipe End Closing for Torsion Beam & Heavy-Wall Tube
TD-382 Stabilizer Bar Closing Machine | NC Servo Pipe End Closing for Torsion Beam & Heavy-Wall Tube
Stabilizer bar and torsion beam tube closing machine. TD-382 is TONG DA’s NC servo tube end closing machine. The forming rollers are driven by servo X and Y axes and follow a programmed path, so the dome radius can be set freely and flat area and center hole are program settings too; a product change is a program recall. Built for large-diameter, heavy-wall tube and for parts with demanding or varied end shapes: automotive stabilizer bars and torsion beams, large shock absorber cylinders, hydraulic cylinder tubes, industrial gas springs. Used in a Japanese automotive supply chain, running in plants in Japan, Thailand and China.
TD-311 / TD-332 Automatic Tube Sealing Machine | Auto-Feeding Single-Station Pipe End Closing
TD-311 / TD-332 Automatic Tube Sealing Machine | Auto-Feeding Single-Station Pipe End Closing
TD-311 (also called TD-332) is a single-station auto-feeding tube closing machine for gas spring and gas lift cylinders Ø15–28 mm, wall 1.0–2.0 mm, length 100–500 mm. Tubes are fed from a hopper, closed and unloaded automatically; the end is cold roll-spun into a dome with adjustable arc and hole – no weld or plug. Hydraulic clamping and PLC touch control for high-volume production.
TD-31040 Heat Pipe & Heat Exchanger Tube End Closing Machine | Stainless & Copper Tube Sealing
TD-31040 Heat Pipe & Heat Exchanger Tube End Closing Machine | Stainless & Copper Tube Sealing
TD-31040 closes the ends of heat pipes, heat exchanger tubes and shell-and-tube bundles. Stainless steel and copper tubes are cold roll-spun into a one-piece closed end with no weld seam and no plug; the wall thickens naturally at the closure. Machine range Ø10–40 mm, wall 0.8–2.0 mm; heavy-wall or special tubes can be evaluated on sample.
TD-31050 Shock Absorber Tube Closing Machine | Two-Station Pipe End Closing, Ø15–50 mm
TD-31050 Shock Absorber Tube Closing Machine | Two-Station Pipe End Closing, Ø15–50 mm
TD-31050 is a patented hydraulic two-station arc-top closing machine for tube OD Ø15–50 mm and wall 0.8–3.0 mm. It cold roll-spins the tube end fully closed or with a center hole – no heating, welding or plastic plug. PLC touch control, inverter spindle speed and a strengthened forming unit make it suited to shock absorber cylinders and larger tubes.
TD-31040 Tube End Closing Machine for Furniture, Strollers & Outdoor Chairs | Replaces Plastic Plugs
TD-31040 Tube End Closing Machine for Furniture, Strollers & Outdoor Chairs | Replaces Plastic Plugs
TD-31040 closes tube ends on furniture, chairs, strollers, cribs, outdoor loungers, wheelchairs, crutches, telescopic poles and lighting. The open end of a steel or aluminum tube is cold roll-spun into a smooth dome, replacing plastic end plugs and welded caps: nothing to fall out, no sharp edge, no grinding before plating or coating. Machine range Ø10–40 mm, wall 0.8–2.0 mm; heavy-wall or special tubes can be evaluated on sample.
TD-21025 Flat-End Tube Closing Machine | Flat Sealing for Furniture, Heat Pipes & Strollers
TD-21025 Flat-End Tube Closing Machine | Flat Sealing for Furniture, Heat Pipes & Strollers
TD-21025 is a patented hydraulic flat-end tube closing machine. It cold roll-spins a metal tube end into a flat closed bottom or one with a center hole – no heating, welding or plastic plug, with a smooth, safe finish. For furniture, baby chairs and strollers, heat pipes and heat exchanger tubes; PLC touch control.
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