Prevent Electrostatic Hazards During Rubber Production

For the solutions and security measures, the following points will be discussed.

Static field

1. Where there are processes and equipment with electrostatic hazards, corresponding electrostatic safety measures must be adopted. I can summarize the electrostatic field in several points

2. In areas where explosive gas may appear in the surrounding environment, ventilation measures must be strengthened to control the concentration below the lower explosion limit.

3. After taking electrostatic safety measures, the electrostatic potential of the insulator should be controlled below the recommended allowable value.

4. In areas with danger of explosion and fire, operators must wear anti-static shoes or conductive shoes, and anti-static overalls. The operating area should be laid with the conductive ground, and the resistance of the conductive ground to the ground should be lower than 10 Ω and must be kept regularly. Due to its electrical conductivity, it is strictly forbidden for operators to wear synthetic fiber clothes (except clothes that have been regularly treated with anti-static solution) to enter the above areas, and it is strictly forbidden to take off clothes in the above areas.

5. In any place where it is necessary to prevent the human body from being charged, the operator should wear anti-static shoes, the ground in the operation area should be laid with the conductive ground, and its conductive properties should be maintained frequently.

Anti-static production process

The electrostatic safety precautions for the main processes and places in the production process of rubber products are as follows:

1. Rubber mixing: An ion current static eliminator should be installed when an open rubber mixing machine is used for raw rubber plasticization, sheeting of insulating rubber materials, and re-melting of gasoline glue film.

2. Hot refining: When using an open rubber mixing machine for insulating hot rubber, an induction static eliminator should be installed at the place where the film is taken out.

3. Manufacture of glue: When using flammable solvents to make glue, the following measures must be taken:

(1) The glue manufacturing machinery should use gear transmission as much as possible. When using V-belt transmission, the transmission V-belt must use an anti-static V-belt. If ordinary V-belt transmission is used, measures must be taken to improve its surface conductivity, and It should be checked regularly and dealt with in time according to the use situation so that the resistance value to the ground at any point on the surface is not greater than 10 Ω in any case;

(2) The peeling of the adhesive film on the wall of the glue barrel must leave the area with the danger of explosion and fire, and the action must be light and slow;

(3) It is strictly forbidden to use the pump to spray the solvent directly into the mortar mixing tank, and the self-flow method must be adopted. When the pipeline for conveying the mortar and gasoline and other solvents is rubber or plastic pipe, conductive rubber, conductive plastic hose, or metal pipe must be used. Braided conductive hose and must be grounded reliably;

(4) When manually putting glue strips, transporting glue, and opening glue bucket lids or coverings, the action must be light and slow. It is strictly forbidden to use insulating materials for coverings.

4. Gluing: When applying flammable solvent glue, the following measures must be taken:

(1) When designing a gluing machine, its rubber roller must be a conductive rubber roller;

(2) Install inductive static eliminators at appropriate locations;

(3) Increase the relative humidity of the surrounding environment of the charged body, and set up local steam spray facilities at the front of the drying cabinet at the outlet of the rubber coating roller and the rubber cloth to keep the relative humidity of the air around the charged body above 70 percent . The equipment must be turned on before starting. Steam spray pipe valve;

(4) All operating tools that come into contact with the glue and live insulators should be made of materials with a resistivity of 10 to 10 Ω·cm;

5. Calendering and cutting: During the rolling and cutting process of cords and canvases, static eliminators should be installed where operators often touch live insulators;

6. Tire cord lamination: During the lamination operation of the lamination machine, an induction static eliminator or an ion current static eliminator must be installed in an appropriate position;

7. Molding: For molding processes using gasoline and solvent cement, the following measures must be taken according to different processes:

(1) Turning tire forming: When using a metal folding machine head to form a turning tire, it must be operated according to the "parallel capacitor method";

(2) Conveyor belt molding: ion current static eliminator and induction static eliminator must be installed in appropriate positions, and the work surface must be a conductive surface and be reliably grounded;

(3) Rubber shoe molding: When using the brushing process, the brushing table must be a conductive table and be grounded reliably. It is strictly forbidden to sit on a chair with an insulating surface such as artificial; Ungrounded metal plates are laid on the panels. When the normal ventilation system stops running for some reason, production must be stopped;

(4) Forming of tape products: When workers operate, especially when doing peeling action, the action must be light and slow. The workbench must be a conductive table and must be reliably grounded.

8. Upper cloth and cloth: in the process of shoe upper cloth and cloth, an induction static eliminator should be installed in the appropriate position of the cloth combination machine;

9. Cloth drying: During the drying process of the cloth drying room, an induction static eliminator must be installed in the appropriate position of the cloth drying machine;

10. Gasoline and another solvent (barrel) storage: conductive rubber floor must be used, and plastic barrels and cans (except conductive plastic barrels and cans) are strictly prohibited for storing gasoline and other flammable solvents.