Batch coating apparatus and batch coating method

A batch coating apparatus, comprising a fixing mechanism, a liquid holding mechanism, a liquid injection mechanism and a control device, wherein:

• the fixing mechanism comprises a plurality of fixing portions for fixing work-pieces to be coated;
• the liquid holding mechanism comprises a plurality of liquid tanks arranged side by side, wherein,
• the plurality of liquid tanks have a same shape for holding a coating liquid,
• the plurality of liquid tanks comprise a tank body portion having an accommodating space and an opening portion connected to the tank body portion,
• a cross-sectional area of the opening portion is greater than that of the tank body portion, and
• the liquid holding mechanism and the fixing mechanism are relatively movable;
• the liquid injection mechanism comprises a liquid storage portion and an infusion portion, wherein,
• the liquid storage portion is configured to accommodate the coating liquid,
• the infusion portion is connected with the liquid storage portion,
• the infusion portion is configured to supply the coating liquid, and
• the liquid injection mechanism and the liquid holding mechanism are relatively movable;
• the control device is configured to control at least one of a relative movement between the fixing mechanism and the liquid holding mechanism and a relative movement between the liquid holding mechanism and the liquid injection mechanism;
• the control device is configured to control the liquid injection mechanism to supply the coating liquid via the infusion portion;
• when coating the work-pieces to be coated fixed to the fixing mechanism,
• the control device controls a relative movement between the liquid injection mechanism and the liquid holding mechanism so that the infusion portion aligns with the plurality of liquid tanks, and
• the control device controls the infusion portion to supply a predetermined volume of coating liquid into the plurality of liquid tanks;
• and
• the control device controls the liquid holding mechanism and the fixing mechanism to relatively move so that the work-pieces to be coated fixed to the fixing mechanism are immersed into the coating liquid in the plurality of liquid tanks and left from the coating liquid in the plurality of liquid tanks, thereby forming a coating film of a predetermined thickness on the work-pieces to be coated.