When molding is being carried out using a mold, sometimes accidents occur in which a part gets damaged or broken due to some reason. Since a mold is a machine, the parts constituting a machine can get damaged due to some reason. The important thing is to find out the cause of such damage, and to take technical measures to prevent such an accident from occurring again.
If repairs are done while the reason for the damage is still vague and no fundamental technical measures have been taken, the same accident may occur again, or can even have the danger of causing harm to the workers.
Analysis of an accident of mold damage starts with detailed investigative analysis.

Types of damages

• Damage
• Wear
• Corrosion
• Fatigue
• Impact (shock)
• Excessive stress
• Fracture
• Breakage, rupture

Items to be investigated in the event of a mold damage accident

(1) Investigation of materials

• Investigation of manufacturing history
• Composition analysis (chemical analysis, impurity analysis, etc.)
• Investigation of mechanical properties (tensile test, compression test, buckling test, impact test, hardness test, etc.)
• Fatigue
• Surface observation and evaluation (macro, micro)
• Investigation of surface conditions, investigation of residual stress
• Investigation by observation of fracture surface

(2) Investigation of design standards

• Verification of the design presumptions

(3) Investigation of usage environment

• Investigation of external operating forces (size, repetition, impact, creep, etc.)
• Investigation of external environment (temperature, humidity, chemical atmosphere)
• Investigation of status of repairs

(4) Simulation

• Investigations of material mechanics
• Verification using simulation software
• Reproduction experiment

(5) Overall investigation

* Note 1)
Reference: "Causes and Countermeasures of Damage to Machines and Equipment" (Shin-ichi Nishida, Nikkan Kogyo Shimbun, Ltd. (in Japanese))