SOP on Cleaning of Dies and Punches


on Cleaning of Dies and Punches



Objective : To describe cleaning procedure for Dies
and Punches.



To ensure that the Dies and Punches are clean and free from any starting
materials of  previous batch or product


Responsibility : 1.It 
is the responsibility of operating staff to clean the dies &

2. Production
Chemist to ensure that procedure is followed.


& Equipment :

Cleaning agent: Isopropyl Alcohol / Methylene
Chloride / Edible Oil

Brush / lint free cloth

Plastic / SS tub




Switch Off the mains of compression machine.

Dismantle all dies and punches.

Keep all dies, lower punches and upper punches
separately in plastic tub.

Remove any visible material from surfaces of all
dies and punches with dry lint free cloth, nylon brush.

Clean inside surfaces of all dies with nylon brush.

Clean and wipe surfaces of all dies and punches with
a lint free cloth & spray / pour Isopropyl alcohol / Methylene chloride.

Let all dies and punches dry in air or dry with a clean
lint free cloth.

Send all dies and punches for buffing and polishing.

Apply edible oil on inner / outer surfaces of dies
and punches to protect from possible rusting during storage.

Keep all punches in individual plastic tubes and
store in appropriate plastic box under lock and key.

Before next use, clean with a dry lint free cloth to
remove any oily material from the surface of all dies and punches.