Apparatus Used in an Electroplating Process for Holding Workpieces
An apparatus for holding a plurality of workpieces to be electroplated includes at least one container immersed in and rotatable relative to a plating solution. The container includes two end plates, and a surrounding plate cooperating with the end plates to define a receiving space adapted to receive the workpieces, and an opening adapted for entry and exit of the workpieces into and out of the receiving space. The surrounding plate includes a curved sliding section having two opposite first and second ends, a tumbling section that is adapted to allow the workpieces to tumble thereon when the container is rotated and that has a third end connected to the first end, and a fourth end opposite to the third end, and a plurality of through holes formed in the sliding and tumbling sections. The opening is disposed between the second and fourth ends.
1. Field of the Invention
The invention relates to an apparatus, more particularly to an apparatus for holding a plurality of workpieces to be electroplated.
2. Description of the Related Art
Referring to
When electroplating of small workpieces 10, such as screws, is desired, the cover plate 16 is first opened, and the workpieces 10 are put into the barrel 1 via the opening 15. Afterwards, the opening 15 is closed by the cover plate 16. The barrel 1 is then immersed in the plating solution 19 in the plating tank 18. The transmission gears 12 are subsequently activated so as to rotate the barrel 1 about a horizontal axis, thereby plating the workpieces 3.
However, because the workpieces 10 undergo a vigorous tumbling action as they move from one flat surface 17 to another flat surface 17, and since the workpieces 10 are made of metal, when the workpieces 10 bump into each other, the surfaces thereof are easily damaged, thereby adversely affecting the final quality of the electroplated workpieces 10.
SUMMARY OF THE INVENTIONTherefore, the object of the present invention is to provide an apparatus for holding a plurality of workpieces to be electroplated that is capable of overcoming the aforementioned drawbacks of the prior art.
According to this invention, an apparatus for holding a plurality of workpieces to be electroplated comprises a container unit including at least one container immersed in and rotatable relative to a plating solution. The container includes two spaced-apart end plates, and a surrounding plate connected between the end plates and cooperating with the same to define a receiving space adapted to receive the workpieces, and an opening in spatial communication with the receiving space and adapted for entry and exit of the workpieces into and out of the receiving space. The surrounding plate includes a curved sliding section that has two opposite first and second ends, a tumbling section that is adapted to allow the workpieces to tumble thereon when the container is rotated and that has a third end connected to the first end, and a fourth end opposite to the third end, and a plurality of through holes formed in the sliding and tumbling sections and adapted to permit flow of the plating solution therethrough. The opening is disposed between the second end and the fourth end.
Other features and advantages of the present invention will become apparent in the following detailed description of the preferred embodiments with reference to the accompanying drawings, of which:
Before the present invention is described in greater detail, it should be noted that the same reference numerals have been used to denote like elements throughout the specification.
Referring to
The container unit includes a container 3 immersed in a plating solution 22 that is disposed in a plating tank 20. The container 3 is rotatable in this state immersed in the plating solution 22. The container 3 includes two spaced-apart flat end plates 32, a surrounding plate 31 connected between the end plates 32, and two flat rotated plates 33 connected respectively and fixedly to the end plates 32 such that the end plates 32 are disposed between the rotated plates 33.
The surrounding plate 31 and the end plates 32 cooperatively define a receiving space 35 (see
A plurality of through holes 347 are formed in the sliding section 341 and the tumbling section 342, and are adapted to permit flow of the plating solution 22 therethrough.
Each pair of the friction wheels 41 is disposed under and in frictional contact with a respective one of the rotated plates 33, as best shown in
In use, initially, the workpieces 21 are fed into the container 3 via the opening 30, and are immersed in the plating solution 22. Afterwards, the motor is activated so as to drive the friction wheels 41 to rotate the container 3. When the container 3 is rotated from a position shown in
When the container 3 is rotated from the position shown in
From the aforementioned description, it is apparent that through the flat plate portions 3421 of the tumbling section 342, the workpieces 21 can undergo significant tumbling during rotation of the container 3 so that the surface of each workpiece 21 may be in contact with the plating solution 22. As such, the surfaces of the workpieces 21 may be electroplated uniformly. Further, through the curved configuration of the sliding section 341, the work pieces 21 undergo a dampened tumbling action at the sliding section 341, thereby minimizing the bumping forces and frictional impact among the workpieces 21. Hence, the quality of the electroplated workpieces 21 can be enhanced.
Referring to
Since the shafts 37 are used to rotate the container 3′ in this embodiment, the friction wheels 41 used in the first preferred embodiment are dispensed herein, thereby minimizing the overall cost of the present invention. Alternatively, rotation of the container 3′ may be achieved through other means, and is not limited to the present disclosures.
Referring to
While the present invention has been described in connection with what are considered the most practical and preferred embodiments, it is understood that this invention is not limited to the disclosed embodiments but is intended to cover various arrangements included within the spirit and scope of the broadest interpretation so as to encompass all such modifications and equivalent arrangements.
Claims
1. An apparatus for holding a plurality of workpieces to be electroplated, said apparatus comprising a container unit including at least one container immersed in and rotatable relative to a plating solution, said container including two spaced-apart end plates, and a surrounding plate connected between said end plates and cooperating with said end plates to define a receiving space adapted to receive the workpieces, and an opening in spatial communication with said receiving space and adapted for entry and exit of the workpieces into and out of said receiving space, said surrounding plate including a curved sliding section that has two opposite first and second ends, a tumbling section that is adapted to allow the workpieces to tumble thereon when said container is rotated and that has a third end connected to said first end, and a fourth end opposite to said third end, and a plurality of through holes formed in said sliding and tumbling sections and adapted to permit flow of the plating solution therethrough, said opening being disposed between said second end and said fourth end.
2. The apparatus of claim 1, wherein said container further includes two rotated plates connected respectively and fixedly to said end plates such that said end plates are disposed between said rotated plates, said apparatus further comprising two pairs of friction wheels, each pair of said friction wheels being disposed under and in frictional contact with a respective one of said rotated plates and being driven to rotate the respective one of said rotated plates.
3. The apparatus of claim 1, wherein said container further includes two shafts connected respectively and fixedly to said end plates such that said container is rotatable along with said shafts.
4. The apparatus of claim 3, further comprising a rotatable frame adapted to be rotatable relative to the plating solution, said container unit including a plurality of said containers connected pivotally to said rotatable frame and angularly spaced apart from each other.
5. The apparatus of claim 1, wherein said tumbling section includes a plurality of interconnected flat plate portions, each two adjacent ones of which form an angle therebetween, said angle being greater than 90°.
Type: Application
Filed: Aug 22, 2008
Publication Date: Feb 25, 2010
Inventors: Hsiue-Te TU (Taipei City), Hwa-Chung Tu (Albany)
Application Number: 12/196,906
International Classification: C25D 17/00 (20060101);