US20140186528A1 - Masking method used in surface treatment process - Google Patents
Masking method used in surface treatment process Download PDFInfo
- Publication number
- US20140186528A1 US20140186528A1 US14/018,778 US201314018778A US2014186528A1 US 20140186528 A1 US20140186528 A1 US 20140186528A1 US 201314018778 A US201314018778 A US 201314018778A US 2014186528 A1 US2014186528 A1 US 2014186528A1
- Authority
- US
- United States
- Prior art keywords
- paint
- treating process
- method used
- masking method
- surface treating
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Abandoned
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Classifications
-
- C—CHEMISTRY; METALLURGY
- C25—ELECTROLYTIC OR ELECTROPHORETIC PROCESSES; APPARATUS THEREFOR
- C25D—PROCESSES FOR THE ELECTROLYTIC OR ELECTROPHORETIC PRODUCTION OF COATINGS; ELECTROFORMING; APPARATUS THEREFOR
- C25D11/00—Electrolytic coating by surface reaction, i.e. forming conversion layers
- C25D11/02—Anodisation
- C25D11/022—Anodisation on selected surface areas
-
- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09D—COATING COMPOSITIONS, e.g. PAINTS, VARNISHES OR LACQUERS; FILLING PASTES; CHEMICAL PAINT OR INK REMOVERS; INKS; CORRECTING FLUIDS; WOODSTAINS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; USE OF MATERIALS THEREFOR
- C09D5/00—Coating compositions, e.g. paints, varnishes or lacquers, characterised by their physical nature or the effects produced; Filling pastes
Definitions
- the present disclosure relates to masking methods, and particularly to a masking method for masking inner surfaces of holes of a workpiece in a surface treatment process.
- holes of the workpiece can be protected from the treatment process by a masking method.
- a masking method protective rubber plugs can be employed to block or plug the holes, such that the holes are protected from being treated.
- the protective rubber plugs cannot tightly adhere to the inner surfaces of the holes so as to completely block the holes. If the holes are too small, insertion of the protection rubber plugs is difficult.
- FIG. 1 shows one embodiment of a protection coating layer protecting a plurality of holes in a workpiece.
- FIG. 2 is a data table presenting the testing results obtained from testing of three test examples of the embodiment and a comparative example.
- FIG. 1 shows a workpiece 10 having a plurality of holes 11 .
- the workpiece 10 is treated by an anodizing method, and inner surfaces of the holes 11 are not treated.
- the holes 11 are protected by a protection coating layer 30 .
- the holes 11 can be in any shape.
- a depth of the holes 11 is in a range from about 0.1 millimeters (mm) to about 15 millimeters (mm), and a width of the holes 11 is in a range from about 0.9 mm to about 10 mm.
- the protection coating layer 30 is formed on inner surfaces of the holes by coating a layer of paint on inner surfaces of the holes 11 .
- the paint includes resin, solvent, and additive agents.
- a surface tension of the surface of the layer of paint is smaller than or equal to about 22 milliNewtons per meter (mN/m).
- a solid content of the paint is smaller than or equal to about 30%.
- the resin is resistant to acid and alkali corrosion, and is selected from one or more of the group consisting of fluororesin, silicon resin, silicon rubber, epoxy resin, acrylic resin, and polyurethane resin.
- the surface tension of the resin is reduced by adding one or more of the following functional groups attached to the resin: fluoro-functional groups, aliphatic hydrocarbons, and organosilicon functional groups.
- the solvent is an organic solvent selected from one or more from the group consisting of isoparaffin solvent, toluene, ethyl acetate, acetone, and butanone, as long as the resin can be dissolved in the solvent.
- the additive agents are selected from one or more of the group consisting of diluents, curing agents, initiators, sensitizers, adhesion promoters, dispersing agents, wetting agents, thickening agents, and antifoaming agents. In other embodiments, the additive agents can be omitted.
- a masking method for protecting the holes 11 of the workpiece 10 is illustrated as follows. First, a paint having a surface tension smaller than or equal to about 22 mN/m is prepared. Next, a layer of the paint is uniformly coated on the inner surfaces of the holes 11 . Finally, the layer of the paint is cured to form a protection coating layer 30 on the inner surfaces of the holes 11 . A thermal curing method or a photocuring method can be employed to cure the layer of the paint, depending on the type of paint used. In the embodiment, a thickness of the protection coating layer 30 is in a range from about 0.1 micrometer ( ⁇ m) to about 5.0 micrometer ( ⁇ m), such as, for example, 1 ⁇ m, 2 ⁇ m, and 3 ⁇ m.
- the thickness of the protection coating layer 30 is adjusted by the percentage of solid content.
- FIG. 2 presents the testing results obtained from three test examples of the embodiment (serving as the experimental group) and alongside the testing results obtained from a comparative example (serving as the control group), to show or demonstrate that the protection coating layer 30 formed in and in accordance with the embodiment is better (in performance) than a protection coating formed by conventional methods.
- the paint can be coated or applied on by brush coating, spray coating, curtain coating, or the like.
- the surface tension of the paint is smaller than or equal to 22 mN/m, such that a layer of the paint is easily coated on the inner surfaces of the holes 11 , thereby forming a protection coating layer 30 completely adhered to the inner surfaces of the holes 11 . Even though the holes 11 are irregularly-shaped or hard to access, the protection coating layer 30 cannot be easily broken. Even though the holes 11 are relatively small, the protection coating layer 30 cannot be detached from the inner surface of the holes 11 . In addition, because the thickness of the protection coating layer 30 is small enough, after the surface treating process is performed, the protection coating layer 30 does not need to be removed. Thus, a production process is simplified, reducing a production cost by adopting the masking method for protecting the holes 11 of the workpiece 10 in accordance with the embodiment.
- the resin when the workpiece 10 is treated by other surface treatments that are not acidic or alkaline, the resin is made to be resistant to the corresponding surface treatment. For example, if the workpieces 10 are to be treated by plating, then the resin is resistant to a plating solution.
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- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Materials Engineering (AREA)
- Organic Chemistry (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Electrochemistry (AREA)
- Metallurgy (AREA)
- Life Sciences & Earth Sciences (AREA)
- Wood Science & Technology (AREA)
- Application Of Or Painting With Fluid Materials (AREA)
- Details Or Accessories Of Spraying Plant Or Apparatus (AREA)
Abstract
A masking method used in a surface treating process is disclosed. The masking method includes the following steps: preparing paint, coating the paint on inner surfaces of a hole in a workpiece, and curing the paint, thereby forming a protection coating layer on the inner surfaces of the hole to protect the inner surfaces of the hole during a surface treatment process. The paint is resistant to the surface treatment process, and includes resin and solvent. A surface tension of the paint is smaller than or equal to 22 mN/m.
Description
- 1. Technical Field
- The present disclosure relates to masking methods, and particularly to a masking method for masking inner surfaces of holes of a workpiece in a surface treatment process.
- 2. Description of the Related Art
- During a surface treatment process, such as anodizing, of a workpiece, holes of the workpiece can be protected from the treatment process by a masking method. In a masking method, protective rubber plugs can be employed to block or plug the holes, such that the holes are protected from being treated. However, if the holes are irregular or have a complicated shape, the protective rubber plugs cannot tightly adhere to the inner surfaces of the holes so as to completely block the holes. If the holes are too small, insertion of the protection rubber plugs is difficult.
- Therefore, there is room for improvement within the art.
- The components in the drawings are not necessarily drawn to scale, the emphasis instead being placed upon clearly illustrating the principles of the present disclosure. Moreover, in the drawings, like reference numerals designate corresponding parts throughout several views.
-
FIG. 1 shows one embodiment of a protection coating layer protecting a plurality of holes in a workpiece. -
FIG. 2 is a data table presenting the testing results obtained from testing of three test examples of the embodiment and a comparative example. -
FIG. 1 shows aworkpiece 10 having a plurality ofholes 11. Theworkpiece 10 is treated by an anodizing method, and inner surfaces of theholes 11 are not treated. In one embodiment, theholes 11 are protected by aprotection coating layer 30. Theholes 11 can be in any shape. A depth of theholes 11 is in a range from about 0.1 millimeters (mm) to about 15 millimeters (mm), and a width of theholes 11 is in a range from about 0.9 mm to about 10 mm. - The
protection coating layer 30 is formed on inner surfaces of the holes by coating a layer of paint on inner surfaces of theholes 11. The paint includes resin, solvent, and additive agents. A surface tension of the surface of the layer of paint is smaller than or equal to about 22 milliNewtons per meter (mN/m). A solid content of the paint is smaller than or equal to about 30%. The resin is resistant to acid and alkali corrosion, and is selected from one or more of the group consisting of fluororesin, silicon resin, silicon rubber, epoxy resin, acrylic resin, and polyurethane resin. The surface tension of the resin is reduced by adding one or more of the following functional groups attached to the resin: fluoro-functional groups, aliphatic hydrocarbons, and organosilicon functional groups. The solvent is an organic solvent selected from one or more from the group consisting of isoparaffin solvent, toluene, ethyl acetate, acetone, and butanone, as long as the resin can be dissolved in the solvent. The additive agents are selected from one or more of the group consisting of diluents, curing agents, initiators, sensitizers, adhesion promoters, dispersing agents, wetting agents, thickening agents, and antifoaming agents. In other embodiments, the additive agents can be omitted. - One embodiment of a masking method for protecting the
holes 11 of theworkpiece 10 is illustrated as follows. First, a paint having a surface tension smaller than or equal to about 22 mN/m is prepared. Next, a layer of the paint is uniformly coated on the inner surfaces of theholes 11. Finally, the layer of the paint is cured to form aprotection coating layer 30 on the inner surfaces of theholes 11. A thermal curing method or a photocuring method can be employed to cure the layer of the paint, depending on the type of paint used. In the embodiment, a thickness of theprotection coating layer 30 is in a range from about 0.1 micrometer (μm) to about 5.0 micrometer (μm), such as, for example, 1 μm, 2 μm, and 3 μm. The thickness of theprotection coating layer 30 is adjusted by the percentage of solid content.FIG. 2 presents the testing results obtained from three test examples of the embodiment (serving as the experimental group) and alongside the testing results obtained from a comparative example (serving as the control group), to show or demonstrate that theprotection coating layer 30 formed in and in accordance with the embodiment is better (in performance) than a protection coating formed by conventional methods. The paint can be coated or applied on by brush coating, spray coating, curtain coating, or the like. - The surface tension of the paint is smaller than or equal to 22 mN/m, such that a layer of the paint is easily coated on the inner surfaces of the
holes 11, thereby forming aprotection coating layer 30 completely adhered to the inner surfaces of theholes 11. Even though theholes 11 are irregularly-shaped or hard to access, theprotection coating layer 30 cannot be easily broken. Even though theholes 11 are relatively small, theprotection coating layer 30 cannot be detached from the inner surface of theholes 11. In addition, because the thickness of theprotection coating layer 30 is small enough, after the surface treating process is performed, theprotection coating layer 30 does not need to be removed. Thus, a production process is simplified, reducing a production cost by adopting the masking method for protecting theholes 11 of theworkpiece 10 in accordance with the embodiment. - In other embodiments, when the
workpiece 10 is treated by other surface treatments that are not acidic or alkaline, the resin is made to be resistant to the corresponding surface treatment. For example, if theworkpieces 10 are to be treated by plating, then the resin is resistant to a plating solution. - Depending on the embodiment, some of the steps described above can be eliminated, while other additional steps can be added, and the sequence of steps can be changed. It is also to be understood that the description and the claims drawn to a method can include some indication in reference to certain steps. However, the indication used is only to be viewed for identification purposes and is not a suggestion as to an order for the steps.
- It is to be understood, however, that even though numerous characteristics and advantages of the disclosure have been set forth in the foregoing description, together with details of the structure and function of the embodiments, the disclosure is illustrative only, and changes may be made in detail, especially in the matters of shape, size, and arrangement of parts within the principles of the embodiments to the full extent indicated by the broad general meaning of the terms in which the appended claims are expressed.
Claims (10)
1. A masking method used in a surface treating process, comprising steps as follows:
preparing a paint, the paint being resistant to the surface treating process, the paint comprising a resin and a solvent, and having a surface tension smaller than or equal to about 22 mN/m;
coating a layer of the paint on an inner surface of a hole in a workpiece; and
curing the paint, thereby forming a protection coating layer on the inner surface of the hole to protect the inner surface of the hole being treated in the surface treating process.
2. The masking method used in the surface treating process of claim 1 , wherein the surface treating process comprises an anodizing process, the resin is resistant to acid and alkali corrosion, the resin is selected from one or more from the group consisting of fluororesin, silicon resin, silicon rubber, epoxy resin, acrylic resin, and polyurethane resin.
3. The masking method used in the surface treating process of claim 1 , wherein a thickness of the protection coating layer is in a range from about 0.1 μm to about 5 μm.
4. The masking method used in the surface treating process of claim 1 , wherein the paint further comprises an additive agent, the additive agent is selected from one or more from the group consisting of diluents, curing agent, initiator, sensitizer, adhesion promoter, dispersing agent, wetting agent, thickening agent, and antifoaming agent.
5. The masking method used in the surface treating process of claim 1 , wherein the solvent is selected from one or more from the group consisting of isoparaffin, toluene, ethyl acetate, acetone, and butanone.
6. The masking method used in the surface treating process of claim 1 , wherein the resin is added by fluoro functional group, hydrocarbon aliphatic functional group, or organosilicon functional group.
7. The masking method used in the surface treating process of claim 1 , wherein a solid content of the paint is smaller than or equal to about 30%.
8. The masking method used in the surface treating process of claim 1 , wherein the paint is coated on the inner surface of the hole in the workpiece by a brush coating.
9. The masking method used in the surface treating process of claim 1 , wherein the paint is coated on the inner surface of the hole in the workpiece by a spray coating.
10. The masking method used in the surface treating process of claim 1 , wherein the paint is coated on the inner surface of the hole in the workpiece by a curtain coating.
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
TW101150747A TWI550137B (en) | 2012-12-28 | 2012-12-28 | Masking method for surface treating process |
TW101150747 | 2012-12-28 |
Publications (1)
Publication Number | Publication Date |
---|---|
US20140186528A1 true US20140186528A1 (en) | 2014-07-03 |
Family
ID=51017483
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
US14/018,778 Abandoned US20140186528A1 (en) | 2012-12-28 | 2013-09-05 | Masking method used in surface treatment process |
Country Status (2)
Country | Link |
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US (1) | US20140186528A1 (en) |
TW (1) | TWI550137B (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN105088304A (en) * | 2015-08-10 | 2015-11-25 | 华南师范大学 | Method for preparing an ordered nanodot array by one-step template method |
Families Citing this family (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN104480504A (en) * | 2014-11-20 | 2015-04-01 | 浙江西田机械有限公司 | Vortex wall oxidation device |
Family Cites Families (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US7156945B2 (en) * | 2002-04-24 | 2007-01-02 | Sipix Imaging, Inc. | Process for forming a patterned thin film structure for in-mold decoration |
-
2012
- 2012-12-28 TW TW101150747A patent/TWI550137B/en not_active IP Right Cessation
-
2013
- 2013-09-05 US US14/018,778 patent/US20140186528A1/en not_active Abandoned
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN105088304A (en) * | 2015-08-10 | 2015-11-25 | 华南师范大学 | Method for preparing an ordered nanodot array by one-step template method |
Also Published As
Publication number | Publication date |
---|---|
TW201425653A (en) | 2014-07-01 |
TWI550137B (en) | 2016-09-21 |
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Date | Code | Title | Description |
---|---|---|---|
AS | Assignment |
Owner name: HON HAI PRECISION INDUSTRY CO., LTD., TAIWAN Free format text: ASSIGNMENT OF ASSIGNORS INTEREST;ASSIGNORS:SHIEH, PEI-RONG;WU, CHANG-CHIN;REEL/FRAME:031145/0117 Effective date: 20130904 |
|
STCB | Information on status: application discontinuation |
Free format text: ABANDONED -- FAILURE TO RESPOND TO AN OFFICE ACTION |