Automatic10-20L square can production line

The layout of the production line

10-20 Liter square can making machinery

Main Features

1. More than 20 years experience and reputation both at home and abroad;
2. Quality Assurance, excellent after service and reasonable price;
3. Reliable and safe to control, easy to operate and maintain;
4. Equipped with human-computer interface and PLC; adopt digital control technology;
5. Full automatic, semi-automatic, and multi mould, suitable for different cans shape and size.

Big square can automatic production line operating process

First, place the cut can body materials into the automatic resistance welding machine's feeding table,Suck by the vacuum suckers,send the tin blanks to the feeding roller one by one.through the feeding roller,the single tin blank is fed to the rounding roller to conduct rounding process,then it will be fed to the rounding forming mechanism to make rounding.

The body is fed into the resistance welding machine and make welding after the accurate positioning.After welding,the can body is automatically fed into the rotary magnetic conveyor of the coating machine for outer coating,inner coating or inner powder coating, Which depends on customer's various need.It is mainly used to prevent the side welding seam line from being exposed in air and rusting.The can body should be placed in induction drying oven to dry if it's inner coating or inner powder coating.Afer drying, It will be fed to cooling device to make natural cooling.

The cooled can body is then fed to the big square can combination machine,and the can body is in an upright state going through the uprighting conveyor.It is fed to the first automatic side welding seam indexing station by the clamps.The second station is square expanding.When the can body is in position,on the can body lifting tray which is controlled by a servo motor,and the can body is sent by this lifting tray to the square expanding mold to make square expanding.The third station is to make panel and corner embossing.

When the can body is in position, on the can body lifting tray which is controlled by a servo motor,and the can body is sent by this lifting tray to the make panle and corner embossing at a time.The fourth station is top flanging,the fifth station is bottom flanging.The bottom flanging:the can will be sent to the bottom flanging mold lying on the upper part of the machine by lifting tray to make it.The top flanging:the upper cylinder will press the can body to the position of top flanging mold to make it.

Both the top and bottom can body flanging are each driven by four cylinders.The sixth station is automatic lid detecting and feeding and seaming.After the above six procedures,the can will be reversed up and down by reversing device,and then make top seaming,this process is the same as the bottom seaming process.Lastly.the finished can is fed by conveyor to automatic leak tester station.After accurate air source inspection,unqualified products are detected and pushed to a fixed area,and qualified products will come to the packaging workbench for the final packaging process.

Constituent parts of this metal can making line

Metal slitter machine

First cut/min width 150mm Second cut/min width 60mm
Speed /pcs/min 32 Thickness of the sheet 0.12-0.5mm
Power 22KW Voltage 220v  380v  440v
Weight 21100kg Machine Dimension 2530X1850X3990mm

In a typical canbody production line, the slitter is the first stage in the manufacturing process. It cuts printed and lacquered metal sheets into body blanks of the required size. The addition of a blank stack transfer unit further increases the slitter’s efficiency.

Our slitters are custom-made. They are extremely robust, facilitate simple, swift adjustment to different blank formats and ensure exceptionally high precision.When it comes to versatility, precision, reliability and production speed, our slitters are so suitable for tin canbody producing.

Powder system

Model of the machine CTPC-2 Voltage&Frequency 380V 3L+1N+PE
Speed 5-60m/min Powder consumption 8-10mm&10-20mm
Air consumption 0.6Mpa Can diameter range D50-200mm   D80-400mm
Air requirement 100-200L/min Power consumption 2.8KW
Dimensions 1090*730*1830mm Weight 310kg

Powder coating system is one of the powder coating products launched by Changtai Company. This machine is dedicated to the spray coating technology of tank welds of can manufacturers. Our company adopts advanced powder coating technology, which makes the machine novel structure, high system reliability, easy operation, wide applicability and high performance-price ratio. And the use of reliable control components, and touch control terminal and other components, making the system more stable and reliable.

Automatic can body welding machine

Frequency range 100-280HZ Welding speed 8-15m/min
Production capability 25-35Cans/min Applicable can diameter Φ220-Φ300mm
Applicable can height 220-500mm Applicable material Tinplate,steel-based,Chrome plate
Applicable material thickness 0.2~0.4mm Applicable copper wire diameter

Φ1.8mm ,Φ1.5mm

Cooling water

Temperature: 12-20℃   Pressure:>0.4Mpa    Flow:40L/min

Total power 125KVA Dimension


Weight 2500Kg Powder 380V±5%  50Hz

The canbody welder is at the heart of any three-piece can production line. It forms the body blanks into their basic shape and welds the seam overlap. Our Superwima welding principle requires only a minimal overlap of a few tenths of a millimeter. Optimum control of the welding current combined with precision-matched pressure on the overlap. Since the launch of the new generation of welders, customers all over the world have confirmed today their considerable satisfaction on an outstanding and a high machine reliability combined with an economical and an efficient production. New industrial standards have been set in the manufacture of canbodies worldwide.

Coating machine

Applicable Can height 50-600mm Applicable  Can diameter 52-400mm
Roller speed 5-30m/min Coating type Roller coating
Lacquer width 8-15mm    10-20mm Main supply and Current load 220V     0.5 KW
Air consumption  0.6Mpa 20L/min Machine dimension& 2100*720*1520MM300kg

Powder coating machine is an important part of the three-piece can production line, which is highly praised by customers at home and abroad in the market and is an excellent can making equipment. Chengdu Changtai is committed to providing customers with the best quality can making equipment and developing the best solution.

High frequency electromagnetic dryer

Conveyor speed 5-30m/min Can diameter range 52-180mm
 Conveyor type  Flat chain drive Cooling diduct. coil Not require water/air
Effictive heating 800mm*6(30cpm) Main supply 380V+N>10KVA
Heating type Induction Sensing distance 5-20MM
Higher Heating 1KW*6(temperature set) Induction point 40MM
Frequency setting 80KHz+-10 KHz Induction time 25Sec(410mmH,40CPM)
Electro.Radiation protective Covered with safety guards Rise time(MAX) Distance 5mm  6sec&280℃
Demension 6300*700*1420mm Net Weight 850KG

Changtai has a modular range of curing systems designed to harden the seam protection layer effectively. Immediately after the application of the lacquer or powder seam protection layer, the canbody goes heat treatment. We have developed advanced gas or induction-operated modular heating systems with automatic temperature regulation and speed-adjustable conveyor belts. Both heating systems are available in linear or U-shape layout.

Automatic can body combination machine

6、combination machine
Production capacity 30-35cpm Range of can Dia 110-190mm
Range of can height 110-350mm Thickness ≤0.4
Total power 26.14kw Pneumatic system pressure: 0.3-0.5Mpa
Body uprighting conveyor size 2350*240*930mm Infeed conveyor size 1580*260*920mm
Combination machine size 2110*1510*2350mm Weight 4T
Electric carbinet size


A can production line usually ends with a palletizer. The pail assembly line ca be customized, which will ensure stacks that can be palletized in a next steps.

Tin can making artcraft


10-20L square can flowing chart

Automatic round can production line

The can making production line is suitable for the automatic production of 10-20L square can, which is composed of three metal plates: can body, can cover and can bottom. The can is square shaped.
Technical flow:cutting the tin sheet to blank-rounding-welding-inner and outer coating
(inner powder coating and outer coating)-drying-cooling conveying-square expanding-panel,
corner embossing-upper flanging-lower flanging-bottom lid feeding-seaming-turning over-
top lid feeding-seaming-leak testing-packaging