Wrapping Material

· Stretch wrapping film

· Core size: 3"

· Film width: 500mm

· Film diameter: max. 260mm

· Film thickness: 14-35μm

· One roll of stretch film to be supplied along with the machine for trial running

2.2.3 Utility

· Compressed air

? · Pressure: 0.5-0.7 MPa

? · Dew point: +2-+10℃ (at 7 bar)

? · Filter: 40 μm

? · Air quality: oil-free and water-free air

? · Air consumption: 1000ml/min

· Power supply

? · 380V (+/- 10%) / 3 phase / 50Hz (+/- 1Hz)

? · Power installed: ≈2.5kW

2.2.4 Supply Scope

Machine Main Frame – 1 set

· Gantry type frame made of square steel tube (Material: Q235 steel)

· Driving motor base installed on the frame

· Rotary arm fixed on the frame and connected with a slew bearing

· Frame size: to be confirmed by drawing

Driving Device for Rotary Arm – 1 set

· Frequency control motor with brake

· Power rating: 1.1kW

· Rotary arm speed: n=15rpm (frequency motor with brake)

· Two position limits equipped on both ends of the rotary arm

Film Carriage – 1 set

· Open-door type pre-stretch film carriage, stretch ratio 250% (1m to 3.5m)

· Film carriage lifting drive: chain driving, good stability and high reliability

· Driving reducer: worm gear reducer

· Motor power: 0.37kW

Film Carriage Delivery Device – 1 set

· Photoelectric switch installed on the film carriage for automatic pallet height detection

· Driving motor: AC motor, speed adjustable

· Power rating of film delivery driving motor: 0.37kW

· Film delivery following up mechanism

? · The film delivery follows the rotary arm rotation. The proximity switch controls the start/stop of the film delivery motor to follow the rotary arm

Film Auto Feeding and Cutting Device – 1 set

· When stretch wrapping is finished, the film will be cut and clamped automatically

· When the film tail is released from the clamp, the air shooter blows the film tail up. The film tail is then wrapped by stretch film and kept tightly against the pallet to ensure no film tail is produced

· Film hot melt cutting adopts an electrical heating wire to cut the film

· After the film is cut, the hot sealer automatically seals the film tail to ensure no loose tail remains

· Pneumatic components: FESTO brand

Pneumatic Control System – 1 set

· Air source requirement: compressed air shall be supplied by the end user to the inlet of the stop valve

· Pneumatic cylinder controlled by control box

Electrical Control System – 1 set

· Sinolion standard control cabinet

· PLC control system: wrapping layers, wrapping cycles, and top wrapping time can be set on HMI

· Safety command can be added to the control program via a PLC extension module to ensure machine safety

· Photo eye automatically detects pallet height and length

· Air resource equipped with a single-direction valve to stop air release when pressure is unstable

· Driving speeds of the rotary arm, chain conveyor, and film carriage lifting are individually adjustable. Film delivery speed is also adjustable. The wrapper alarms when film break occurs

· Equipped with pause/manual/automatic wrapping switch function for better operation

Safety Guard Fence with Light Curtain – Optional

· The frame is equipped with a safety guarding device and safety fence. The lock of the safety fence is interlocked with the main machine

· When the safety door opens, the machine stops automatically

· Light curtain brand: Schmersal

Maintenance Platform – Optional

· Used for the operator to climb to the top for maintenance

· The safety guard fence effectively protects personal safety

· The maintainer can stand on the maintenance platform to perform their work