Complete and easy-to-operate LPG cylinder production line

3. Automatic trimming machine

This machine is reliable in performance and easy to operate.
Motor power: 5.5KW
Air pressure: 0.6Mpa
Processing time: 20s
Machine weight: 1.5 tons

4. End disc neck cleaning machine

Motor power: 7KW
Air pressure: 0.6Mpa
Processing time: 15s
Machine weight: 1.5 tons

5. Hole punching machine

Drill holes in the cylinder head
Electric power: 5.5KW
Punching speed: 180pcs/hour
Machine weight: 1.5 tons

6. Valve seat welding machine

Complete welding of valve seat ring joints.

7. Handle welding machine

Complete the automatic welding of the ring seam of the cylinder bottom. Ensure concentricity, uniform molding, good appearance, weld penetration and weld width meet the process requirements, and easy clamping. CO2 gas shielded welding process, one welding is completed.

8. Base welding machine

Motor power: 0.55KW
Air pressure: 0.5-0.7Mpa
Voltage: 380V
Welding speed: 15s/pcs
Machine weight: 1.5 tons
Steel plate thickness: 2-4mm

9. Assembly machine

Assemble the two halves of the cylinder together and prepare it for welding
Motor power: 0.25KW
Air pressure: 0.5-0.7Mpa
Voltage: 220V
Machine weight: 1.5 tons

16. Powder coating line

Working voltage: 380V, 50Hz
Air pressure: 0.4~0.6Mpa
Tower power: 15KW
Work efficiency: 180pcs/hour

17. Printing press

Printing size (length*width): 700*600mm
Production efficiency: 2pcs/min
Ink consumption: ≤2g/pc
Weight: 0.5T

The submerged arc welding technology is applied to the welding of the half of the valve body on the seam welding machine, usually used for the welding of the valve seat and the upper half of the cylinder. Welding automation units with reliable welding power packs and control units are used to achieve the degree of automation required for uncompromising welding quality and the production capacity required by each customer. MIG/MAG welding techniques are used to weld the foot ring and guard ring to the body halves. Welding is the most critical link in the production line, which ensures the best performance and good quality of the cylinder. Our welding machinery is the best gas cylinder and pressure vessel welding equipment in China, and also ranks first in the world.

The fully automatic welding machine includes socket welding, handle/neck welding, bottom ring welding, and circumference welding, all machines work automatically, half cylinders are conveyed by mechanical arms and chains, this system really saves a lot of labor costs and improves work efficiency obviously. In order to re-relive all the stresses caused by the forming and welding operations, the cylinders pass through a heat treatment furnace where they are exposed to a temperature of 930 º C for a certain period of time before being gradually cooled.

The surface of the LPG cylinder is shot blasted by a shot blasting machine to remove the scale generated by the heat treatment operation, and prepare the painted and/or galvanized surface for customers who require galvanizing before painting. The double layer overcured spraying of the cylinders is achieved automatically by a robotic paint application system in the coating line as the cylinders pass primary and final coats on an overhead conveyor system separated by a flash channel before curing in the canopy Modern paint curing oven in the spray cabinet type.

After the cylinders are weighed and marked, the valves are installed by an automatic torque control tightening machine and tested for leaks in the valve area by a pneumatic leak testing machine on the finishing line. One of the international standards called batch quality control equipment is the burst expansion test device, which can measure the volume expansion ratio and the burst pressure, which fully meets even the most stringent requirements.