Method of coating workpieces

Patent metadata

Field	Value
Publication number	US-9364856-B2
Application number	US-201414529990-A
Country	US
Kind code	B2
Filing date	Oct 31, 2014
Priority date	Apr 23, 2014
Publication date	Jun 14, 2016
Grant date	Jun 14, 2016

Abstract

A method of coating a workpiece is provided. In the method, a coating device is provided. The coating device includes a transparent covering plate and an ultraviolet light source device. The workpiece is placed in the coating device. Coating material is injected into the coating device to coat the workpiece. The coating material is ultraviolet light curable material. The ultraviolet light source device emits ultraviolet light and the ultraviolet light passes through the transparent covering plate to cure the coating material on the workpiece. The workpiece is taken out of the coating device.

First claim

What is claimed is:

1. A method of coating a workpiece, comprising:
providing a coating device, the coating device comprising a transparent covering plate and an ultraviolet light source device;
placing the workpiece in the coating device;
injecting coating material into the coating device to coat the workpiece, the coating material being ultraviolet light curable material;
emitting ultraviolet light by using the ultraviolet light source device, the ultraviolet light passing through the transparent covering plate to cure the coating material on the workpiece; and
taking the workpiece out of the coating device;
wherein the coating device comprises a support holding the workpiece, the covering plate and the workpiece cooperatively define a coating cavity, the covering plate defines an injection passage communicated with the coating cavity, the coating material is injected into the coating cavity to coat the workpiece through the injection passage;
the coating device comprises a vacuum device, the support defines a through hole communicated with the coating cavity and the vacuum device, and the vacuum device exhausts the air in the through hole to suck the workpiece on the support;
the support comprises a base and a support bracket, the through hole runs all the way through the base and the support bracket, the base comprises a top wall and four sidewalls all connected to the top wall, the base defines a receiving room in the top wall, the receiving room is in communication with the through hole, the support bracket is partially received in the receiving room, and the support bracket holds the workpiece.

2. The method of claim 1 , wherein the base defines a recess in the top wall, the recess surrounds and is communicated with the receiving room, the base defines a first suction channel in a bottom surface of the recess, the first suction channel surrounds the receiving room, the base defines a ventilation opening communicated with the vacuum device and the first suction channel, the base comprises a seal sheet positioned on the bottom surface of the recess and covering the first suction channel, and the vacuum device sucks the seal sheet on the bottom surface of the recess through the ventilation opening and the first suction channel.

3. The method of claim 2 , wherein the seal sheet defines an opening, the support bracket is substantially “T” shaped, the support bracket comprises a reduced bottom portion, a suction portion, and an extension portion connected between the reduced bottom portion and the suction portion, the reduced bottom portion is received in the receiving room, the suction portion and the extension portion are positioned outside the receiving room and pass through the opening, and the suction portion holds the workpiece.

4. The method of claim 3 , wherein the workpiece comprises an inner surface, an outer surface and an end surface connected between the inner surface and the outer surface, the suction portion touches a bottom portion of the inner surface, the extension portion touches a side portion of the inner surface, a gap between the extension portion and the side portion of the inner surface is sealed to prevent the coating material from flowing into the inner surface, and the extension portion is positioned on the seal sheet.

5. The method of claim 3 , wherein the suction portion defines a plurality of second annular suction channels and a third suction channel, the second annular suction channels have the same center, the third suction channel runs through the center of the second annular suction channels, the second annular suction channels and the third suction channel are in communication with the through hole, and the workpiece is sucked on the suction portion by the vacuum device through the through hole, the second annular suction channels, and the third suction channel.

6. The method of claim 3 , wherein the base comprises four positioning poles and four adjustment poles, the four positioning poles are positioned at four corners of the top wall, each adjustment pole is received in a respective one of the positioning poles and is capable of sliding in or out of the respective positioning pole, the covering plate defines four positioning holes at four corners thereof, the four adjustment poles are received in the four positioning holes correspondingly, the four adjustment poles are capable of being driven to move the covering plate to cover the support or move the covering plate away from the support.

7. The method of claim 1 , wherein the covering plate defines an air channel communicated with the coating cavity, the vacuum device is in communication with the air channel, the coating device comprises an injection device, the injection device is in communication with the injection passage, and the coating material is injected into the coating cavity by the injection device through the injection passage.

8. The method of claim 7 , wherein the injection passage and the air channel are each “L” shaped.

9. The method of claim 1 , wherein the workpiece is placed in the coating device or taken out of the coating device by using a workpiece placing device, the workpiece placing device comprises a vertical support unit, a horizontal pole, and a suction nozzle, the horizontal pole is perpendicularly connected to the vertical support unit and is capable of moving along the vertical support unit, and the suction nozzle is positioned on the horizontal pole and configured to hold the workpiece with vacuum.

10. The method of claim 9 , wherein the horizontal pole comprises a first straight pole and a second straight pipe, the first straight pole holds the suction nozzle, the first straight pole is capable of sliding in or out of the second straight pipe in a horizontal direction, so as to place the workpiece in the coating device or move the workpiece out of the coating device.

11. The method of claim 1 , wherein the workpiece is cleaned up by a plasma cleaner before placed in the coating device.

Assignees

• Scienbizip Consulting Shenzhen Co Ltd
• Scienbizip Consulting Shenzhen Co Ltd

Inventors

• Dai Feng-Yuen
• Liu Jih-Chen
• Yeh Hung-Lien
• Lee Han-Lung
• Tseng Shun-Chi
• Ma Hung-Chun

Classifications

• B29C35/0888

  using transparant moulds · CPC title

• B05C9/02 Primary

  for applying liquid or other fluent material to surfaces by single means not covered by groups B05C1/00 - B05C7/00, whether or not also using other means · CPC title

• B29C45/14

  incorporating preformed parts or layers, e.g. injection moulding around inserts or for coating articles {(B29C45/1671 takes precedence)} · CPC title

• B05C9/14

  the auxiliary operation involving heating {or cooling} · CPC title

• B29C45/1701

  using a particular environment during moulding, e.g. moisture-free or dust-free · CPC title