The safety hazards of printing machines mainly fall into four categories: mechanical transmission, electrical, chemical materials, and working environment. Targeted preventive measures should match the corresponding risks and comply with current national safety standards for printing machinery.
I. Common Safety Hazards
1. Mechanical transmission and operating unit hazards
Exposed gears, sprockets, belt pulleys, conveyor rollers, and other transmission parts can cause entanglement or crushing injuries.
High-speed moving nip rollers in the feeding and delivery areas can cause entanglement if hands are reached in while the machine is running. Unsecured delivery stacks may collapse and injure personnel.
Cutting, die-cutting, and hot stamping units with blades can cause cuts or puncture injuries if hands are inserted for adjustment without locking out the machine.
2. Electrical safety hazards
If the metal frame is not reliably grounded or grounding fails, personnel may suffer electric shock when touching the machine.
Aging or damaged wiring in humid workshops can cause short circuits, fires, or electric shock.
Emergency stop buttons that are blocked, ineffective, or poorly positioned cannot cut off power quickly.
High-voltage static discharge from digital printing equipment may ignite volatilized ink solvents.
3. Chemical and material hazards
VOCs volatilized from flammable and explosive materials such as inks and thinners can cause fire or explosion when triggered by high temperature, open flames, or electrical sparks. Long-term inhalation may also cause chronic poisoning.
When installing printing plates, blankets, and other consumables, failure to use dedicated tools can result in cuts from sharp edges.
Waste ink and solvent containers that are not sealed can allow vapors to accumulate, increasing the risk of fire or explosion.
4. Working environment hazards
Poor workshop ventilation allows VOC accumulation, creating poisoning or explosion risks.
Ink or water spills on the floor that are not cleaned promptly can cause slips and falls.
Working at height to adjust printing units without protective equipment may lead to fall accidents.
II. Targeted Preventive Measures
1. Mechanical safety protection measures
All transmission parts must be equipped with fixed or interlocked protective devices that comply with relevant safety standards, and unauthorized removal is strictly prohibited.
Infrared sensing or photoelectric protection devices should be installed in feeding and delivery areas so the machine stops automatically when personnel enter dangerous zones. Cutting units must be equipped with dual-button start devices that require both hands to trigger simultaneously, preventing one hand from entering the danger area.
All units with blades should be physically isolated. Lockout and tagout procedures must be performed before debugging or maintenance.
For non-standard protective guards, interlock mounting brackets, or safety device components, Hansheng Automation can provide custom machining based on customer drawings or sample parts.
2. Electrical safety protection measures
The metal frame of the printing machine must be reliably grounded, and grounding resistance should be tested regularly to ensure it remains at or below 4Ω.
Electrical wiring in humid workshops should be fitted with moisture-proof insulation sheathing, and residual current operated protective devices should be installed and tested periodically.
The emergency stop button on each machine must be placed in a visible and easily accessible location, marked in red, and kept unobstructed. Its function should be checked before every shift, and machines with ineffective emergency stops must not be operated.
Digital printing equipment should be equipped with static elimination devices to prevent high-voltage static discharge from igniting solvent vapors.
3. Chemical and material safety measures
Inks, thinners, and other chemicals should be sealed and stored in dedicated explosion-proof cabinets. The workshop should have a forced ventilation system to ensure VOC concentrations meet occupational exposure limits.
Operators must wear solvent-resistant gloves and protective goggles. Emergency eyewash stations, fire extinguishers, and emergency rescue supplies should be available in the workshop.
Waste ink and solvent containers must be sealed with lids and regularly collected by qualified disposal units.
4. Working environment and management measures
Keep the workshop floor dry and clean. Clean up ink or water spills promptly to prevent slips.
For work at height, safety harnesses must be worn, and fixed work platforms with protective rails should be installed.
Establish a pre-shift inspection system. All safety devices must be confirmed functional before startup, and machines with hidden hazards must not be operated.
Operators must receive pre-job safety training and pass assessment before starting work. Working under the influence of alcohol or while fatigued is strictly prohibited.
