PET film slitting machine safety operation procedures and protection points

1. Preamble

PET film (polyester film) is widely used in packaging, electronics, optics, new energy and other fields due to its excellent mechanical properties, heat resistance, and insulation. As a key equipment for film processing, slitting machines have high operating speed, sharp knives, and high tension, which poses risks such as mechanical injury, electrical safety, and fire hazards. In order to ensure the personal safety of operators, ensure the stable operation of equipment and product quality, it is crucial to formulate and strictly implement safety operating procedures and protection points.

2. Preparation before taking office

1. Personnel qualifications

• Operators must undergo professional training, be familiar with equipment structure, performance, operating procedures and emergency treatment methods, and can only take up their posts after passing the assessment.

• It is strictly forbidden to work after drinking, fatigue or taking drugs that affect mental state.

2. Personal Protective Equipment (PPE)

• Work clothes: wear tight, anti-static work clothes with tight cuffs, and it is strictly forbidden to wear ties, scarves and other easy-to-wrap items.

• Protective gloves: wear cut-resistant gloves when touching blades or carrying films; When loading and unloading, you can wear non-slip gloves as needed.

• Safety shoes: wear anti-smashing and non-slip safety shoes to prevent heavy objects from falling and injuring.

• Safety Goggles: When cleaning the blade and observing high-speed operating areas, it is recommended to wear safety goggles to prevent debris from flying.

• Earplugs: Earplugs must be worn in environments where the device is noisy and exceeds 85 decibels.

3. Equipment inspection

• Before starting the machine, check whether the safety devices such as emergency stop buttons, safety light curtains, and protective covers are intact and effective.

• Confirm that the slitting blades (round knives, flat knives) are firmly installed without cracks and defects.

• Check whether there are leaks in the air circuit and hydraulic system, and whether the air pressure gauge indicates normal.

• Clean the surface and surrounding debris of the equipment to ensure that the operating area is tidy, free of oil stains and obstacles.

3. Safety specifications during operation

1. Power-up and trial operation

• Before turning off the power supply, loudly warn the surrounding personnel to "prepare to turn on".

• After starting the equipment, idle at low speed for 1-2 minutes to observe whether there is any abnormal sound or vibration of the equipment, and confirm that the transmission parts are running normally.

• Check whether the guiding system and tension control system are working properly.

2. Feeding and film threading

• Use a special spreader or hydraulic lifting vehicle when feeding to ensure that the female reel and the chuck are accurately aligned to prevent the coil from slipping and injuring.

• During the film threading process, the equipment must be in a stopped or jogging state. It is strictly forbidden to guide the film through the tool group or pressure roller by hand during the operation of the equipment.

• Hands should not be close to dangerous areas such as blades, meshing rollers, and flattening rollers. Use film introduction tools (such as film introduction tapes, film introduction sticks) to assist film penetration.

3. Parameter setting and operation

• According to the thickness, width and slitting process requirements of the film, the speed, tension, winding pressure and other parameters are correctly set on the control panel, and overspeed and overload operation are strictly prohibited.

• When starting the equipment, gradually accelerate from low speed to set speed to avoid sudden high-speed start-up that can cause film breakage or splashing.

• When the equipment is running, it is strictly forbidden to open the protective cover, remove the safety light curtain or reach over the protective fence to touch the film, blade and roller.

• The operator should stick to his post, observe the operating status of the film, the neatness of the winding and the sound of the equipment at all times, and press the emergency stop button immediately if he finds any abnormalities.

4. Tool change and adjustment

• When replacing or adjusting the slitting blade, the power supply and air supply of the equipment must be cut off, and the emergency stop switch must be pressed, and the warning sign of "Someone is working, no closing" must be hung.

• Use special tools to change knives, the blade is sharp, and should be handled gently when picking and placing to avoid injury or damage to the blade.

• When adjusting the gap between the tool shaft and the pressing roller, it should be done in a completely stationary state.

4. Blanking and finishing work

• After the slitting is completed, the equipment can be completely stopped before the discharge operation can be carried out.

• Use the discharge trolley or cart to pick up the finished coil core, and handle it gently to prevent rolling and falling.

• Clean up the waste edge material in time, and the entanglement of the waste edge material may cause equipment jamming or personnel tripping. It is strictly forbidden to pull the waste edge during the operation of the equipment.

• Use a special air gun to clean the dust and debris on the surface of the equipment, and be careful to avoid electrical components.

5. Protection points and risk control

1. Mechanical injury protection

• Rotating part protection: All exposed rotating shafts, gears, and couplings must be fitted with a strong protective cover.

• Blade protection: Blades that are not in working condition should be covered with protective covers; After the equipment is shut down, the tool set should be in a safe position (e.g., disengaged).

• Safety interlock device: ensure that the safety light curtain, safety door switch, cable switch and other interlocking devices are sensitive and reliable, and it is strictly forbidden to artificially shield or short connect.

2. Electrical safety

• Keep the door of the electronic control cabinet closed and locked, and not open it by non-professionals.

• The operating environment should be kept dry, and there should be no standing water or conductive dust on the ground.

• If the cable is damaged, leakage, or the motor is abnormally heated, stop the machine immediately and report for repair.

3. Fire safety

• Although PET film is not flammable, it can still be burned under high temperature, frictional static or open flame conditions. Smoking and open flame operations are strictly prohibited around the equipment.

• Regularly clean the inside of the equipment from dust and film debris to prevent static electricity buildup.

• Sufficient dry powder fire extinguishers or carbon dioxide fire extinguishers must be equipped on site and ensure that operators will use them correctly.

• If the film winding friction overheats and smokes, the machine should be stopped immediately, the power supply should be cut off, and a fire extinguisher should be used to deal with it, and it is strictly forbidden to extinguish the electrical fire with water.

4. Electrostatic protection

• PET film is prone to static electricity during the production slitting process, which may lead to electric shock, dust adsorption and even fire.

• Ensure that the equipment is well grounded and regularly check that the static eliminator (such as the electrostatic rod) is working properly.

• In the dry season of autumn and winter, the operator can release body static electricity by touching the grounding metal plate.

6. Emergency treatment of abnormal situations

7. Maintain safety

• When repairing, maintaining and cleaning equipment, the system of "power off, gas cut, listing, and locking" must be implemented.

• Maintenance personnel need to be certified to work, and if equipment needs to be tested during the maintenance process, they must ensure that all personnel are evacuated from the dangerous area and operated by the maintenance personnel themselves.

• Regularly check the wear of the tool, the lubrication status of the bearing, the tightness of the belt and the effectiveness of the safety device, and make records.

8. Summary

The efficient operation of PET film slitting machine is inseparable from the guarantee of safety. Every operator should firmly establish the idea of "safety first, prevention first", strictly abide by the operating procedures, use protective facilities correctly, and be proficient in emergency response skills. Managers should strengthen daily supervision and training, regularly investigate hidden dangers, and ensure the intrinsic safety of equipment. Only by implementing safety responsibilities to every detail can we truly achieve the goal of safe production, high quality and high yield.

Note: This article is a general guidance document, and each enterprise should formulate more detailed and targeted safety operation procedures according to the specific equipment model, production process and site environment, and post it in a conspicuous position of the equipment.