Necking-In & Closing Machines

 

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DENN - spun sample parts

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Our DENN CNC spinning and flow forming machines achieve superb surface finishes.

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High performance "Bio-Based" metal spinning/ forming lubricants formulated to achieve maximum productivity at the lowest price.

DENN CNC Tube (Cylinder) Necking-In & Closing Machines

DENN (Industrias Puigjaner, s.a.) - over 130 years of building metal forming machine tools

necking-in technology

  • CNC controlled machines
  • user-friendly and feature-rich interactive graphical CAD-CAM programming system
  • heating system by induction, torches, friction, ... 
  • closing process without welding
  • optimized for pressure vessels: aluminum liners, fire extinguishers, SCBA, CNG, accumulator shells, industrial gas cylinders, gas storage cylinders, transportation cylinders, special cylinders, ...
  • with loading and unloading units; or with robot(s) on request
  • leak tight and no porosity
  • inert gas minimizes oxidation
  • remote site troubleshooting and programming
DENN necking-in / closing machine        DENN - necking in machine
DENN necking-in / closing machine 
  DENN - tube necking in / closing machine           DENN - tube necking in / closing
 
DENN CTA-720 CNC Tube (Cylinder) End Forming Machine
maximum tube (cylinder) diameter: 711 mm (28 inch)
maximum tube (cylinder) length: 13,600 mm (44.6 feet)
up to 40 mm (1.57 inch) tube (cylinder) wall thickness
DENN CTA-660 CNC tube end forming machine 
DENN - CNG liners samples              DENN - tube necking in / closing samples

DENN - tube necking in / closing samples    DENN - tube necking in / closing sample parts

DENN - tube necking in / closing samples    DENN - tube necking in / closing samples

 

 

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Metal Spinning & Shear Forming Machines 

Shown on right: DENN NTR-100/30 CNC (Industry 4.0) metal spinning & shear-forming machine 

Metal Spinning & Shear Forming Machines 

Shown on right: DENN eSPIN-100 CNC metal spinning & shear-forming machine 

Spun Sample parts

Shown on right: sample parts spun on DENN CNC spinning & shear-forming machines

DENN Flow Forming, Shear Forming, Spinning Machines

Shown on right: a heavy duty chipless metal forming machine for operations such as flow forming, shear forming and spinning

DENN CNC flow forming machines

Shown on right: a DENN CNC flow forming machine

DENN wheel forming machines

Shown on right: a DENN CNC spinning / flow forming machine for wheel manufacturing

DENN tube necking / in closing machines

Shown on right: a DENN CNC tube necking-in / closing machine

DENN trimming-beading-flanging-...- machines

Shown on right: a DENN CNC edge forming machine for polygonal workpieces

DENN circle and rings shears

Shown on right: a DENN circle and ring shear

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