ZGTEK offers fully-automatic ring forming and welding machines. the company also supplies simple machines which only form the rings, the welding needs to be done on a separate butt welder.

Automatic snap band making machine for filter bags, or snap band riveting machine, this machine is the fully automatic solution for the production of snap bands.

Based on different mesh sizes, wire thicknesses and aperture sizes, ZGTEK offers different solutions.

> Products > Oval Cage Welding Machine
Product Picture


  • Model: DLN-16B
  • Wire Qty: 10/12/14/16/20
  • Ring space: can be any value, set in program
  • Cage OD: standard size 64mm*148mm, other sizes optional
  • Input voltage: 380V(2 phase) or customized
  • Power frequency: 50/60Hz
  • Cooling method: natural cooling
  • Air pressure: 0.6-0.8 Mpa
  • Insulation grade: F
  • Designed max capacity of tranformers: 80KVA
  • Tranformer quantity: 2pcs
  • Instant power in sync mode: 36 KVA
  • Instant power in async(time-sharing) mode: 18 KVA
  • Air flow: 300 L/min
  • Weight: about 1300KG


  • Very high welding speed, e.g. For a 16-wire oval cage, one ring takes only 0.24s
  • Rings are locked while welding, ensures good perpendicularity between ring plane and cage axis
  • Gear rack transmission achieves high precision of ring space, ring space can be set in the program through the user-friendly interface
  • The cage is pulled by servo motor, no accumulated locating tolerance, ring space precision is 0.1mm, pulling speed is 0.4m/s
  • Function of bad weld detection and auto re-welding
  • Material selection, different welding parameters for mild steel, galvanized steel and stainless steel
  • Auto compensation gives enough space to insert the ring when the ring distance is short
  • Rails (standard 7500mm, up to 9000mm) and material shelf equipped and connected to the welding unit. The front end of the rail is adjustment-free. Good linearity can be achieved for wire cages
  • Positioning mould manufactured with wire-cutting process, it features high accuracy, good insulation and long life
  • Four air tanks, short air route inside the machine ensures quick response of the cylinder
  • 25mm front plate resulted from one-time machining, firmly secure that the welding cylinders are on the same plane and perpendicular to the axes, thus the linearity of the cage can be ensured
  • Equipped with powerful micro-computing unit
  • Time-sharing power-on transformer reduces the burden on local electricity grid