PCB Technical - Common hidden dangers and preventive measures in the pcb circuit board industry

1). PCB circuit board chemical supply system

Common hidden dangers: leakage, leakage causing environmental pollution or personal injury, chemical burns, etc.

Reasons: equipment and packaging containers are aging, cracked, or impacted to cause drips/leaks; handling violations lead to dumping; personnel operating in violation of regulations without wearing labor insurance products cause burns; unclear labeling and mixed placement; incorrect or excessive addition of drugs; chemical inconsistent Safety technical requirements; pipeline blockage and design flaws; electrical circuit short-circuit causing fire.

Preventive measures:

1. Zoning, classification, and storage in separate warehouses; dedicated field and management by special personnel; adding drugs need to be confirmed and tested; inspecting outer packaging; away from fire sources; good ventilation in the warehouse; controlling the storage of potions in the workshop; high and low liquid level alarm linkage And overflow recovery pipeline;

2. Carry out daily inspections on the integrity of equipment, medicine containers, and pipelines: the safety person in charge of each shift (captain or squad leader) conducts daily team self-inspection before the start of the shift, combined with daily inspections and monthly inspections by the safety management department;

3. Formulate chemical handling and use safety management regulations, and train employees in safe operation and safety awareness;

4. The safety person in charge of the team and the safety officer conduct daily supervision and inspection of the safety behavior of the employees.

2). Circuit board plating

Common hidden dangers: fires, chemical leaks polluting the environment, cranes hitting people, and electric shocks. Toxic by contact with cyanide and inhalation.

Causes of occurrence: slippery ground; ageing of power equipment and short circuits; excessive amounts of chemicals stored on the line; heater catching fire; high temperature of potassium permanganate tank caused by heavy copper wire caused fire, and explosion of other contraindications such as sulfuric acid and hydrogen peroxide by mistake ; Equipment design or installation is not standardized; equipment safety protection facilities are imperfect or have poor safety performance or malfunction; the identification of the hazard sources of the electroplating line is not in place, the lack of preventive measures for the hazards; the safety operation procedures are not perfect, and the employees operate illegally.

Preventive measures:

1. Check and identify the hazard sources of the electroplating line, conduct risk assessment, formulate and implement prevention and control measures;

2. Develop a team safety inspection project list, and each team safety person in charge (captain or squad leader) conducts a team safety inspection before starting work to check the integrity of safety equipment and protective facilities and the effectiveness of safety performance;

3. Install anti-collision and anti-leakage safety devices and facilities for driving, formulate a weekly inspection system, and inspect the effectiveness of safety protection facilities by operators and equipment maintenance personnel during weekly maintenance;

4. Conduct security inspections every month.

5. Special personnel add chemicals to form system control; use air energy or solar energy to replace heating pipes for heating; flame-retardant water-based cleaning agents replace flammable and combustible solvents; electrical equipment is equipped with short-circuit protection, overload protection, and ground fault protection; set flammable Gas concentration leak detection alarm device and fire alarm device.

6. Use automation instead of labor.

3).circuit board etching

Common hidden dangers: liquid medicine leakage, personnel poisoning, chemical burns.

Causes of occurrence: slippery ground, aging equipment, short circuits, excessive amounts of chemicals stored online; aging and short circuits of heating pipes and lines; aging and rupture of pipelines, incorrect or excessive addition of medicines; coil clamp injury of the transmission mechanism and spraying accidents of syrup; Improper protective measures and illegal operations.

Preventive measures:

1. Install temperature and gas concentration alarms; adjust the transmission speed within the safe value range; install ventilation devices; use anti-rust and anti-corrosion materials; store solid and liquid separately; store acid and alkali components; configure electrical circuits as required and check regularly. Replace aging and damaged lines in time.

2. Develop safety operating procedures and implement pre-job training and assessment.

3. Develop a team safety inspection system, and the person in charge of each team safety (the captain or the squad leader) must carry out a team safety inspection before starting work;

4. Develop a periodic maintenance system and implement regular maintenance;

5. Conduct monthly safety inspections.

4). circuit board spray tin

Common hidden dangers: high-power electrical components heat up, sparking and cause fires; heating pipes and wiring are aging and short-circuit; too much carbon slag or flux is brought in, the daily temperature is about 260 degrees, and the temperature is too high; residual oily smoke in the exhaust pipe causes a fire, which is illegal Operation causes burns.

Cause: The quality of electrical components is poor, regular maintenance is not implemented, or the maintenance is not in place, and the operation is illegal.

Preventive measures:

1. Keep the purchase and acceptance of electrical components well. Find problems in time through various methods of inspection;

2. Install fire dampers on the ventilation ducts, and check their integrity and effectiveness on a monthly or quarterly basis;

3. Regularly clean up the residues in the exhaust ducts every quarter;

4. Equipped with high temperature-resistant labor protection products, and wear corresponding high-temperature labor protection equipment specifications during operation and maintenance.

5. Add two temperature sensors to monitor the tin level to prevent dry burning of the side heating plate.

The above part is about common safety hazards and preventive measures in the PCB circuit board industry