1.Making sand molds: molds are divided into steel molds and sand molds. Steel molds are molds made of steel according to design drawings or samples. sand mold. Sand mold making can be done by hand, or it can be produced automatically by equipment (called DISA line). In the past, there were more manual production, but now equipment is gradually used for production.

 

 

 

 

2.Melting molten iron: cast iron pots are generally made of gray cast iron, which is in the shape of a long loaf, also called bread iron. According to the content of carbon and silicon, there are different models and properties. The iron block is heated to above 1250 degree by a heating furnace to be melted into molten iron. Melting molten iron is carried out at the same time or a little earlier than making sand molds.

 

 

 

 

 

 

 

3.Pouring molten iron: The molten iron is transferred to the sand mold through equipment and poured into the sand mold by equipment or workers. This step of pouring molten iron is completed by machines in foreign and domestic companies, while in smaller companies it is done by workers. Workers use something like a ladle to pour the molten iron in the vat into the small ladle, and then pour it into the sand molds one by one from the ladle.

 

 

 

 

4.Cooling and forming: After the molten iron is poured, let it cool naturally for 20 minutes to form. This process continues to melt the molten iron and wait for a new sand mold.

 

 

 

 

 

 

 

 

 

5.Sand removal and grinding: After the molten iron is cooled and shaped, it enters the sand removal equipment through the conveyor belt sand mold, and the sand and excess scrap are removed through vibration and manual treatment, and a rough pot is basically formed. The rough pot needs to go through the steps of rough grinding, fine grinding, and manual grinding by shot blasting machine, so that the sand on the surface can be completely removed and the grinding is relatively smooth, and the burrs on the edge and places that are not easy to be polished are removed by manual grinding.

 

 

6.Spraying and baking: The polished pot enters the spraying and baking process. Workers spray a layer of vegetable oil (vegetable oil for daily consumption) on the surface of the pot, and then enter the oven through the conveyor belt to bake for a few minutes, and a pot is formed. The purpose of spraying vegetable oil on the surface of the cast iron pan for baking is to penetrate the oil into the capillary pores of the iron and form a black anti-rust and non-stick oil film on the surface. The oil film on the surface is not a coating, and it needs maintenance during use. The cast iron pan can be non-stick when used properly.