Vacuum dip coating apparatus

1. A dip coating apparatus, comprising:

a sealed case assembly for containing at least one workpiece to be coated;

an air pump communicated with the sealed case assembly, for pumping air from the sealed case assembly and injecting air into the sealed case assembly;

a fresh coating solution container containing a coating solution and communicated with the sealed case assembly through a first liquid pipeline, for injecting the coating solution to the sealed case assembly;

a recycle coating solution container communicated with the sealed case assembly through a second liquid pipeline, for retrieving the coating solution from the sealed case assembly;

a controller for controlling the air pump to pump air from the sealed case assembly and inject air into the sealed case assembly, controlling the flow of the coating solution from the fresh coating solution container to the sealed case assembly and controlling the flow of the coating solution from the sealed case assembly to the recycle coating solution container; and

a workpiece supporting element for supporting the at least one workpiece and arranged in the sealed case assembly;

wherein the sealed case assembly comprises: a first case element comprising a case without cover and a push-and-pull device for moving the case, and a second case element for assembling with the case to become the sealed case assembly, said second case element comprising a cover, an extending board arranged on one side of the cover, and a slider mounted on a bottom of the cover and the extending board for sliding the workpiece supporting element from the extending board to the cover, wherein the controller further controls the push-and-pull device to move the case to assemble and disassemble the sealed case assembly.

2. The dip coating apparatus of claim 1 , wherein the cover or the case is made of transparent or translucent material.

3. The dip coating apparatus of claim 1 , wherein at least one side of the cover is hinged to at least one side of the case.

4. The dip coating apparatus of claim 1 , wherein the cover is vertically arranged on a platform, or is arranged on the platform with a slant angle, or is flatly arranged on the platform.

5. The dip coating apparatus of claim 1 , wherein the first case element and the second case element are assembled together through hinged configurations.

6. The dip coating apparatus of claim 1 , further comprising an inert gases container communicated with the sealed case assembly, wherein the controller controls the inert gases container to inject inert gases into the sealed case assembly.

7. The dip coating apparatus of claim 1 , wherein a vacuum degree in the sealed case assembly is controlled higher than 0.1 Mpa.

8. A dip coating apparatus, comprising:

a sealed case assembly for containing at least one workpiece to be coated;

an air pump communicated with the sealed case assembly, for pumping air from the sealed case assembly and injecting air into the sealed case assembly;

a fresh coating solution container containing a coating solution and communicated with the sealed case assembly through a first liquid pipeline, for injecting the coating solution to the sealed case assembly;

a recycle coating solution container communicated with the sealed case assembly through a second liquid pipeline, for retrieving the coating solution from the sealed case assembly;

a controller for controlling the air pump to pump air from the sealed case assembly and inject air into the sealed case assembly, controlling the flow of the coating solution from the fresh coating solution container to the sealed case assembly and controlling the flow of the coating solution from the sealed case assembly to the recycle coating solution container; and

a workpiece supporting element for supporting the at least one workpiece and arranged in the sealed case assembly;

wherein the sealed case assembly comprises: a first case element comprising a case without cover and a push-and-pull device for moving the case, and a second case element for assembling with the case to become the sealed case assembly, said second case element comprising a cover, a plurality of extending boards arranged on two sides of the cover, and a slider mounted on a bottom of the cover and the plurality of extending boards for sliding the workpiece supporting element from a former extending boards to the cover, and sliding the workpiece supporting element from the cover to a later extending boards, wherein the controller further controls the push-and-pull device to move the case to assemble and disassemble the sealed case assembly.

9. The dip coating apparatus of claim 8 , wherein the cover or the case is made of transparent or translucent material.

10. The dip coating apparatus of claim 8 , wherein at least one side of the cover is hinged to at least one side of the case.

11. The dip coating apparatus of claim 8 , wherein the cover is vertically arranged on a platform, is arranged on the platform with a slant angle, or is flatly arranged on the platform.

12. The dip coating apparatus of claim 8 , wherein the first case element and the second case element are assembled together through hinged configurations.

13. The dip coating apparatus of claim 8 , further comprising an inert gases container communicated with the sealed case assembly, wherein the controller controls the inert gases container to inject inert gases into the sealed case assembly.

14. The dip coating apparatus of claim 8 , wherein a vacuum degree in the sealed case assembly is controlled higher than 0.1 Mpa.