Can the moulds still be used if they are rusty?
Rusting is a normal phenomenon and is caused by specific reasons, not by the quality of the steel. Now we share the main reasons for mould rusting and the countermeasures to solve it.
I. Reasons for mould rust
(1)The gas produced by the decomposition of the melt
Some raw materials will produce volatile gas after heating, these gases are more corrosive, they will produce corrosion on the mold. Therefore, when the equipment stops working, a soft cloth should be used to wipe the mould and close it. If it is not used for a long time, the mould cavity should be sprayed with anti-rusting agent, and butter should be applied when the mould is closed and the gate should be blocked.
(2) Cooling water in the mould
Most of the moulds use cooling water for cooling, so there is a lot of moisture around the moulding equipment. If the mould is cooled to below the dew point, the moisture in the air will form water droplets on the surface of the mould, which will be easy to rust if not wiped away in time. Especially after the mould has stopped working, condensation will be produced very quickly. Therefore, when the moulding is stopped, the cooling water should also be turned off and the mould should be wiped dry.
(3) Carbide generated during moulding
After a long period of work, carbide is generated by the precipitation and decomposition of the moulding material, which often makes the mould wear, corrosion or rust.
In this regard, if carbide is found to be generated, it should be removed immediately. Therefore, if the mould is rusted, it should be cleaned quickly and it will not affect the use.
