I. Equipment Composition
Unwinding device
The unwinding device consists of a film roll rack, film roll brake, swing roller, EPC device, and triangular plate stacking roller. It unwinds and folds the film at constant tension so the film feeds continuously and stably.
For tension control, a circumferential encoder detects film speed, a position sensor detects the swing roller position, and a magnetic powder brake controls the swing roller position through torque. Film tension is provided by the swing roller cylinder. The tension range is set by adjusting the pressure valve (10 to 40 N). The swing roller switches between intermittent feed and continuous unwinding. The rubber roller rotates in one direction to prevent rollback when the machine stops.
If non-standard parts such as the film roll rack, swing roller, or triangular plate stacking roller need to be machined to site dimensions, we can custom machine them according to customer drawings. Hansheng Automation supports single-piece and small-batch delivery.
Fuse-seal cutter device
The fuse-seal cutter device includes upper and lower mechanism pressure adjustment, height adjustment, a reversing device, and a fuse-seal cutter (with crank connecting rod mechanism and servo motor). It cuts and seals the film by hot melting.
Pressure is adjusted through a pressure reducing valve. The gap adjustment hand roller can adjust pressure in real time. For temperature control, the fuse-seal cutter operates from 300 to 400°C. Keep it clean to avoid impurities affecting the seal.
Bag accumulation device
The bag accumulation device includes a speed adjustment module, pressure adjustment rollers, deceleration rollers, and a bag conveyor (on some machines). It pulls and stacks finished bags.
During operation, the pressure adjustment rollers control the pulling force. The deceleration rollers reduce bag passing speed to ensure neat stacking. The bag conveyor can automatically transfer finished bags and improve production efficiency.
II. Operating Procedures
Preparation
Clean the equipment and remove foreign matter from the surface of each guide roller to prevent interference with film travel. Confirm that the air compressor pressure meets requirements and connect the equipment power supply. Set the fuse-seal cutter temperature (300 to 400°C) and bag making specifications such as length and width.
Film roll installation and threading
Turn on the EPC device power. Install the film roll on the rack. Guide the film through the pulling rollers, swing roller, triangular plate stacking roller, and other parts in sequence.
Manual feed test
Manually control film feed. Check whether each guide roller rotates smoothly. Confirm that the film does not run off track or jam.
Heat sealing parameter setting
After the fuse-seal cutter temperature reaches the set value, further adjust heat sealing time, pressure, and other parameters to ensure seal strength meets requirements.
Film position and size adjustment
Adjust the center position of the folded film so it runs along the machine centerline. Set the film folding size through the triangular plate stacking roller. Use the EPC device to correct lateral deviation.
Auxiliary device debugging
Check whether the ultrasonic welding module, insert device, tape pasting mechanism, and other auxiliary parts are in place. Adjust them to working condition.
Trial run
Start the equipment at low speed. Observe whether all parts move in coordination. Correct position deviation or parameter abnormalities in time.
Heat seal strength verification
Sample the heat seal strength of finished bags. If it does not meet the standard, adjust the fuse-seal temperature or bag making speed until it meets quality requirements.
Formal production
After all parameters are stable, switch to automatic mode for continuous production. Inspect equipment operation regularly.
III. Precautions
Safe operation: do not touch the fuse-seal cutter, transmission parts, or other high-temperature or moving areas while the equipment is running.
Maintenance: clean residue from the fuse-seal cutter surface daily. Regularly check the cylinders, pressure valves, and other parts of the tension control system.
Parameter optimization: adjust temperature and pressure according to film material, such as PE and PP, to avoid over-melting or weak sealing.
Our custom precision parts machining capability is not limited to fuse-seal bag making machines. In addition to parts for plastic packaging machinery and flexible packaging equipment, Hansheng Automation can machine yacht precision parts, RC car precision parts, tobacco packaging machinery parts, and filling machinery parts according to drawings. We also machine non-standard parts for printing machinery, food machinery, and medical devices, supporting drawing-based customization and small-batch delivery.
