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ID : 3427

Cleaning/Sterilization and Maintenance

Cleaning and Sterilization

Note the following when cleaning and sterilizing the robot protective jacket for food processing:

  • Use a designated chemical when cleaning or sterilizing the robot jacket according to the table below
  • For safety, be sure to turn off the robot controller before cleaning.
  • The robot may be extremely hot right after stopping. Wait for a certain period of time before cleaning.
  • It is recommended that robot jacket should be first taken off of the robot and then soaked and washed to prevent any missing spots.
  • If your environment does not allow the robot jacket to be taken off on a daily basis, clean the jacket with wiping. Cleaning by splashing water over the jacket may cause the water to enter the robot unit.
  • It is recommended that sodium hypochlorite should be used for sterilization.
    Sodium hypochlorite concentration: 200 ppm or less
    Sodium hypochlorite diluted with acetic acid can be used.
  • For sterilization with hot water of 60°C or more, take the robot jacket off of the robot and perform only on the jacket. At that time, make sure that hot water is kept off the robot unit.
  • After washing or sterilization, be sure to wash the chemical off with water and dry the jacket well before use. If the jacket is used with any chemical remaining on, it will deteriorate sooner. Even using it without being dried up causes molds to form and germs to grow. Make sure that the jacket should be dried in the shade.
  • If water or chemical liquid ends up penetrating the fabric, replace the jacket.
Cleaning method Detail
Soaking and washing
(recommended)

It is recommended that the robot jacket should be soaked and washed for cleaning.

Perform the following steps to clean with soaking and washing:

  1. Soaking

    2. Use the following chemical to remove the metal-washable bellows with a full or immersion wash. (*1)(*3)

    • ethanol (*2)

  2. Hand-washing, rinsing

    • Wipe the dirt off with a sponge.
    • Do not use a washing machine.
    • Do not rub the jacket with a scrub brush because it may damage the fabric. Also, do not rub the jacket forcibly.
    • Be sure to wash the chemical off with water.
  3. Drying
    • Hang the jacket in the shade and dry it naturally.
    • Do not use a spin-dryer or dryer.
    • Dry the jacket well to prevent molds from forming.
Wiping

If your environment does not allow the robot jacket to be taken off on a daily basis, perform the following steps to wipe the jacket with a chemical for cleaning. Water may penetrate the seams of the jacket. Be careful when wiping with a chemical or wiping with water. Make sure that there are no missing spots left.

  1. Prepare the following chemical:
    • ethanol (*2)
  2. Wiping with a chemical

    • Wipe the jacket with a sponge or dry cloth soaked in the chemical.

      Alternatively, spray the chemical over the jacket and wipe it off.

    • Do not apply excessive force to the jacket when wiping off.
    • If liquid ends up penetrating the fabric, replace the jacket.
  3. Wiping with water
    • Wipe the chemical off with a wet cloth.
    • Do not rub the jacket with a scrub brush because it may damage the fabric. Do not also apply excessive force to the jacket when wiping off.
  4. Wiping with a dry cloth, drying
    • Wipe off with a dry cloth and dry the jacket.
    • Dry the jacket well to prevent molds from forming.

Sterilization

Periodic sterilization with the following chemical, as well as daily washing, keeps the jacket cleaner.

  • Recommended: Sodium hypochlorite (*2) (diluted with water or acetic acid)
    Dilution concentration: 200 ppm or less

    • * Do not soak the jacket for 15 minutes or more.

(*1) Be careful not to damage the jacket when taking the robot jacket off of the robot.

(*2) If detergent or disinfectant is used, be sure to check its "SDS (Safety Data Sheet)" and "Precautions for Use".

(*3) Do not use strong alkaline detergent (above ph11) to clean the flange.

Before use, examine that if the selected chemical do not deteriorate the jacket property, or select a detergent suitable for the following materials.

  • Jacket material (synthesized fabric material)
    • Nylon
    • PET
    • Polyurethane

For the detergent and disinfectant, contact your "DENSO representative".

  1. When removing the end-effector and wiping it with detergent, be sure to clean it after installing the O-ring or washing protective cover on the robot jacket mounting flange according to "Cleaning and Sterilizing the Robot Protective Jacket When the End-effector Is Removed". Otherwise, the liquid enters the inside, causing damage to the end-effector. The washing protective cover is sold as an option. (Part number: 410389-317*)
  2. Do not wash the jacket in a washing machine. Do not rub the jacket forcibly when washing with hands.
  3. When using an iron, the temperature must be low (up to 100°C).

Maintenance

Daily Inspections

Add the following check items to the daily inspections in the robot manual.

Check: How to check: Criterion What to do:
Robot jacket Visually No scratch, tear, or fraying Repair or replacement
No dirt Cleaning and sterilization

Some repair and replacement jobs, shown in "What to do" column, may involve special work. Contact the DENSO service representative.

ID : 3427

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