KR101534133B1 - Insert bonding injection method of multi electrolytic method - Google Patents
Insert bonding injection method of multi electrolytic method Download PDFInfo
- Publication number
- KR101534133B1 KR101534133B1 KR1020150063996A KR20150063996A KR101534133B1 KR 101534133 B1 KR101534133 B1 KR 101534133B1 KR 1020150063996 A KR1020150063996 A KR 1020150063996A KR 20150063996 A KR20150063996 A KR 20150063996A KR 101534133 B1 KR101534133 B1 KR 101534133B1
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- South Korea
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- aluminum plate
- anodizing
- injection
- irregularities
- present
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C45/00—Injection moulding, i.e. forcing the required volume of moulding material through a nozzle into a closed mould; Apparatus therefor
- B29C45/14—Injection moulding, i.e. forcing the required volume of moulding material through a nozzle into a closed mould; Apparatus therefor incorporating preformed parts or layers, e.g. injection moulding around inserts or for coating articles
- B29C45/14467—Joining articles or parts of a single article
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- C—CHEMISTRY; METALLURGY
- C23—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
- C23F—NON-MECHANICAL REMOVAL OF METALLIC MATERIAL FROM SURFACE; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL; MULTI-STEP PROCESSES FOR SURFACE TREATMENT OF METALLIC MATERIAL INVOLVING AT LEAST ONE PROCESS PROVIDED FOR IN CLASS C23 AND AT LEAST ONE PROCESS COVERED BY SUBCLASS C21D OR C22F OR CLASS C25
- C23F1/00—Etching metallic material by chemical means
- C23F1/10—Etching compositions
- C23F1/14—Aqueous compositions
- C23F1/16—Acidic compositions
- C23F1/20—Acidic compositions for etching aluminium or alloys thereof
-
- 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
- C25D11/04—Anodisation of aluminium or alloys based thereon
- C25D11/12—Anodising more than once, e.g. in different baths
-
- 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
- C25D11/04—Anodisation of aluminium or alloys based thereon
- C25D11/16—Pretreatment, e.g. desmutting
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29K—INDEXING SCHEME ASSOCIATED WITH SUBCLASSES B29B, B29C OR B29D, RELATING TO MOULDING MATERIALS OR TO MATERIALS FOR MOULDS, REINFORCEMENTS, FILLERS OR PREFORMED PARTS, e.g. INSERTS
- B29K2077/00—Use of PA, i.e. polyamides, e.g. polyesteramides or derivatives thereof, as moulding material
Abstract
The present invention relates to an insert joint injection method using a multi-type electrolytic method, and more particularly, to a method of forming an uneven surface on an aluminum plate through a first anodizing process, a second anodizing process on the aluminum plate on which the unevenness is formed A step of expanding the unevenness to extend the unevenness formed through the anisotropic surface treatment, the step of fixing the aluminum plate having the unevenness to the mold, and the step of forming an injection product using the injection resin on the aluminum plate, The present invention relates to an insert joint injection method using a multi-type electrolytic method capable of enhancing the bonding force between different materials by expanding the size and irregular shape of the generated pores.
Description
More particularly, the present invention relates to a method for improving bonding strength between an aluminum plate and a dissimilar material such as an aluminum plate through anodizing.
A method of integrating a different kind of metal and synthetic resin with an adhesive is required in a wide technical field such as automobiles, electronic products, household appliances, and industrial devices, and many adhesives have been developed in this regard.
Particularly, an adhesive exhibiting a function by room temperature or heating is used in a joining method in which a metal and a synthetic resin are integrated, and this belongs to general technology at present.
Recently, mobile phones such as smart phones use metal metal frames. In most cases, aluminum materials are used for metal frame production. Aluminum materials can achieve beautiful exterior colors or utilize the properties of aluminum, a thermally conductive material.
The method of manufacturing such a metal frame is classified into two types: a first method in which an aluminum sheet is processed by an CNC milling machine to form an all shape, and an outer surface is anodized; a second method in which aluminum is cast and then the second There is a method.
At present, the first method is mainly used to realize a beautiful appearance color and design. However, there are shapes that are difficult to realize by the milling process compared to the second method. In order to overcome this, an additional shape is implemented by plastic injection using insert injection.
In general, additional processing is required to bond dissimilar materials between aluminum and plastic at the time of insert injection. Common methods for joining dissimilar materials include joining through a mechanical structure, bonding through a bonding material, and joining through an aluminum surface treatment.
In the case of joining through mechanical structure, it is closer to structural joining than joining. In the case of joining through bonding material, bonding strength may be lowered or it may be difficult to apply according to product shape.
FIG. 1 is a schematic view showing a cross section of an anodized aluminum specimen. An anodic coating is formed on the surface of the
However, with the above-mentioned method alone, the bonding force is low, so that there is a problem that the quality of the product bonded by the aluminum specimen and the injection product is unreliable.
An object of the present invention to solve the above problems is to provide a multi-kind electrolytic method capable of improving the bonding force between different materials by enlarging the size and irregular shape of pores generated through the anodizing surface treatment by using the multi- To provide an insert joint injection method.
According to another aspect of the present invention, there is provided an insert joint injection method using a multi-type electrolytic method. The insert joint injection method includes forming a concavity and convexity on a surface of an aluminum plate through a first anodizing process, An uneven expansion step of expanding the unevenness formed through the anodizing process, a step of fixing the expanded aluminum plate to the mold, and a step of forming the aluminum plate using the injection resin to form an injection molding .
Further, the first anodizing step according to the present invention is to form irregularities using a DC voltage, and the second anodizing step is characterized in that the irregularities are extended by using an AC voltage.
In addition, the insert joint injection method using the multi-type electrolytic method according to the present invention is characterized in that an aluminum plate is prepared as an insert material prior to the first anodizing step, a step of degreasing the aluminum plate, Further comprising the steps of:
The first anodizing step according to the present invention is characterized by using a sulfuric acid method using a sulfuric acid solution.
The sulfuric acid method according to the present invention is characterized in that a sulfuric acid solution of 120 to 170 g / l is used as an electrolytic solution and a direct current voltage of 10 to 20 V is applied at a temperature of 15 to 25 degrees for 40 to 50 minutes.
The irregularities formed by the first anodizing process according to the present invention are characterized by having a diameter of 3 to 5 μm and a depth of 10 to 15 μm.
The first anodizing step according to the present invention is characterized by using a phosphoric acid method using a phosphoric acid solution.
The phosphoric acid method according to the present invention is characterized in that a phosphoric acid solution of 250 to 300 g / l is used as an electrolytic solution and a direct current voltage of 20 to 30 V is applied at a temperature of 25 to 35 degrees for 20 to 25 minutes.
The irregularities formed by the first anodizing process according to the present invention are characterized by having a diameter of 6 to 7 μm and a depth of 15 to 17 μm.
Further, the injection resin according to the present invention is characterized in that it comprises a polyamide-based or polyarylamide-based thermoplastic resin.
In the second anodizing process according to the present invention, an alternating current of 1 to 3 A is applied per dm.
The irregularities extended by the second anodizing process according to the present invention are characterized by having a diameter of 8 to 12 μm and a depth of 30 to 33 μm.
According to the present invention, a product can be produced by directly injecting a resin into an aluminum plate, and mechanical properties such as bonding strength can be greatly improved.
Further, after the surface treatment based on the multi-anodic oxidation process of the present invention, even when exposed to the air for a long time, there is an effect that the bonding force is not greatly affected.
1 is a schematic view showing a cross section of an anodized aluminum specimen
2 is a representative block diagram illustrating an insert joint injection method using a multi-type electrolytic method according to an embodiment of the present invention.
FIG. 3A is a view showing a horizontal type bonded injection molding, and FIG. 3B is a view showing a vertical type bonded injection molding.
FIG. 4A is a view showing a tensile direction of the horizontal joint projections, and FIG. 4B is a view showing a tensile direction of the vertical joint projections.
Figs. 5A and 5B are diagrams showing a sample standard of the horizontal bonded extrudate. Fig.
Figs. 6A and 6B are diagrams showing a sample size of the vertical joint projections. Fig.
7A to 7D are photographs showing results of aluminum surface treatment according to Comparative Example 2. Fig.
8A to 8D are photographs showing the results of aluminum surface treatment according to Example 1. Fig.
9 is a graph showing the results of testing tensile strength of the horizontal joint injection according to Comparative Example 1, Comparative Example 2 and Example 1. Fig.
10 is a graph showing the results of testing tensile strength of the horizontal joint injection according to Comparative Example 1, Comparative Example 2 and Example 1. Fig.
DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings in order to facilitate a person skilled in the art to easily carry out the technical idea of the present invention. . In the drawings, the same reference numerals are used to designate the same or similar components throughout the drawings. In the following description of the present invention, a detailed description of known functions and configurations incorporated herein will be omitted when it may make the subject matter of the present invention rather unclear.
Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings.
2 is a representative block diagram illustrating an insert joint injection method using a multi-type electrolytic method according to an embodiment of the present invention.
First, an aluminum (Al) case or an aluminum (Al) plate is manufactured as an insert material. The aluminum plate can be made of pure aluminum material as well as aluminum alloy, and other metal materials can be used. In order to apply it to real products, it is made thin by using press or die casting.
Next, the aluminum plate is degreased to remove oil and foreign matter on the surface of the aluminum plate. It is preferably degreased with a sulfuric acid (H 2 SO 4 ) solution.
The degreased aluminum plate is subjected to an etching process. The etching process is largely divided into an alkali etching and an acid etching. The alkali etching has a small size and smoothness of the generated irregularities, and the acid etching produces rough irregularities of large size and roughness. Acid etching is used when strong unevenness effect is needed and excellent adhesion between different materials.
Unevenness can be formed on the surface of the aluminum plate through the first anodizing process on the pre-treated aluminum plate.
Anodizing means that a corrosion-resistant oxide film is formed on the surface of a metal through electrolysis of an electrolyte aqueous solution using a metal as an anode, and general anodizing methods include a sulfuric acid method, a phosphoric acid method, an aqueous acid method, and a chromic acid method.
In the present invention, the first anodizing step is a step of forming irregularities on the surface of the aluminum plate and means a general anodizing step of forming irregularities using a DC voltage. In the first anodizing step of the present invention, a sulfuric acid method using a sulfuric acid solution or a phosphoric acid method using a phosphoric acid solution may be used.
The sulfuric acid method preferably uses a sulfuric acid solution of 120 to 170 g / L as an electrolytic solution and applies a direct current voltage of 10 to 20 V for 40 to 50 minutes at a temperature of 15 to 25 degrees.
The phosphoric acid method preferably uses a phosphoric acid solution of 250 to 300 g / L as an electrolytic solution and applies a direct current voltage of 20 to 30 V for 20 to 25 minutes at a temperature of 25 to 35 degrees.
A second anodizing step, that is, various anodizing is performed on the aluminum plate having the unevenness. The second anodizing step in the present invention is characterized by using an alternating voltage for expanding pre-formed irregularities.
It is not possible to form fine irregularities by only the AC voltage, and it is possible to increase the bonding force between the different materials by forming irregularities of fine size with the DC voltage and then expanding the irregularities formed by using the AC voltage.
It is possible to preheat the aluminum plate and the mold by fixing the expanded aluminum plate to the mold. The mold consists of a general fixed side and a moving side, and can be injected after inserting an aluminum plate into the mold. An insert injection process using an aluminum specimen as an insert is used so that the inserted insert can be inserted either on the fixed side or on the moving side.
The injection molding resin is used for the aluminum plate to form the injection molding resin. The injection molding resin is a polyamide-based or polyarylamide-based thermoplastic resin and a glass fiber-containing resin. It is preferable to proceed the injection after drying.
After the injection is completed, the aluminum plate bonded to the mold in the mold may be taken out together with the molded product, and the exposed surface of the aluminum plate may be subjected to a surface treatment (coating) for each external specification.
Hereinafter, an injection method of resin for an aluminum plate using anodizing according to the present invention will be described in more detail with reference to embodiments of the present invention. However, these examples are for illustrative purposes only, and the scope of the present invention is not limited to these examples.
1. Comparative Example 1
An aluminum specimen (Al 5052) was prepared from the insert material.
Then, degreasing was performed to remove oil and debris from the surface of the specimen. The degreasing was carried out with 5% sulfuric acid (H 2 SO 4 ). Surfactants were added to prevent additives and oil from recontamination.
The etching was performed by alkali etching or acid etching.
Alkali etching was carried out under the conditions of caustic soda (NaOH, 200 g / L),
When the temperature exceeds 30 DEG C, the irregularities generated are too large to break the irregularities themselves, and the depth of the irregularities is measured to be about 3 to 5 mu m. When the temperature was less than 30 ° C, the etching reaction was so small that the irregularities were not suitable for the joint injection, and the depth of the irregularities was measured to be about 1 to 3 μm.
Acid etching was verified by an anodizing thickness meter and optical microscope, and there was no significant change compared to alkali etching. The depth of the irregularities was measured to be about 2 to 5 μm.
The surface was washed with water and then dried in a temperature range of 50 to 60 DEG C for about 10 minutes.
An insert injection process was performed using an aluminum plate as an insert. An aluminum plate was inserted into a mold having a general stationary side and a moving side, and then injection was performed using an injection resin.
A resin containing a thermoplastic resin of polyamide or polyarylamide type and a glass fiber (G / F) component is used as an injection resin. It is sufficiently dried according to the drying temperature and time specified by the manufacturer before injection into an injection machine, . In this embodiment, PBT G / F proceeds to 30%, and detailed injection conditions are as follows.
- injection conditions
(1) Injection molding machine SPEC: 100TON, horizontal injection molding machine
(2) Injection pressure: 245 to 280 MPa
(3) Injector nozzle temperature: 260 to 300 ° C
(4) Mold and aluminum specimen temperature at injection: 130 ~ 135 ℃ for mold, 120 ~ 130 ℃ for specimen
After the completion of the injection, the bonded aluminum plate and the molded product were taken out together with the mold, and then the exposed surface of the aluminum plate was subjected to surface treatment for coating according to external specifications.
2. Comparative Example 2
An aluminum specimen (Al 5052) was prepared from the insert material.
Then, degreasing was performed to remove oil and debris from the surface of the specimen. The detailed conditions are the same as in Comparative Example 1.
The etching was carried out by alkali etching, and the detailed conditions were the same as those of Comparative Example 1.
Then, unevenness was formed on the surface of the aluminum plate through the first anodizing process using the sulfuric acid method or the phosphoric acid method.
In the case of the sulfuric acid method, a 150 g / L sulfuric acid solution was applied at a temperature of about 20 ° C. for 40 to 50 minutes under a condition of 17 V (DC voltage), and the results were verified through an anodizing thickness meter, an optical microscope and an electron microscope. The irregularities formed in the oxide film through the sulfuric acid method were measured to have a diameter of about 3 to 5 mu m and a depth of about 10 to 15 mu m.
For the phosphoric acid method, 250-300 g / L of phosphoric acid solution was applied at 25 ℃ (DC voltage) for 20 ~ 25 minutes at 30 ℃ and the results were verified by an anodizing thickness meter, optical microscope and electron microscope. The irregularities formed in the oxide film through the phosphoric acid method were measured to have a diameter of about 6 to 7 mu m and a depth of about 15 to 17 mu m.
The surface was washed with water and then dried in a temperature range of 50 to 60 DEG C for about 10 minutes.
An insert injection process was performed using an aluminum plate as an insert, and the detailed conditions were the same as in Comparative Example 1. [
After the completion of the injection, the bonded aluminum plate and the molded product were taken out together with the mold, and then the exposed surface of the aluminum plate was subjected to surface treatment for coating according to external specifications.
3. Example 1
An aluminum specimen (Al 5052) was prepared from the insert material.
Thereafter, degreasing was performed to remove oil and foreign matter from the surface of the specimen. The detailed conditions are the same as in Comparative Example 1.
The etching was carried out by alkali etching, and the detailed conditions were the same as those of Comparative Example 1.
Subsequently, unevenness was formed on the surface of the aluminum plate through the first anodizing process using the sulfuric acid method or the phosphoric acid method, and the detailed conditions were the same as in Comparative Example 2. [
The unevenness formed by the second anodizing process was extended to the unevenness formed aluminum plate.
Specifically, a second anodizing process was performed by applying an alternating current of 1 to 3 A / dm to the aluminum plate subjected to the first anodizing process for about 1 to 10 minutes, and the result was verified through an anodizing thickness meter, an optical microscope, and an electron microscope (Dm = 100 mm x 100 mm size). The unevenness extended by the second anodizing process was measured to have a diameter of about 8-12 μm and a depth of about 30-33 μm.
The surface was washed with water and then dried in a temperature range of 50 to 60 DEG C for about 10 minutes.
An insert injection process was performed using an aluminum plate as an insert, and the detailed conditions were the same as in Comparative Example 1. [
After the completion of the injection, the bonded aluminum plate and the molded product were taken out together with the mold, and then the exposed surface of the aluminum plate was subjected to surface treatment for coating according to external specifications.
4. Test
(1) Purpose of examination
The tensile test was conducted to verify the functional properties of the present invention.
(2) Test method
An injection mold having an aluminum specimen as an insert was manufactured according to Comparative Example 1, Comparative Example 2 and Example 1 described above, and tensile force was tested after insert injection injection (preparation of five samples according to each of Comparative Examples and Examples).
- Aluminum Specimen Size: 40mm X 16mm X 3mm
- Injection size: 42mm X 12mm X 3mm
- Joint area: (horizontal) 12mm X 3mm, (vertical) 12mm X 10mm
- joint surface 130: (horizontal) see FIG. 3a, (vertical) see FIG. 3b
(3) Tensile test conditions
- Test equipment: Tensile tester UTM-EZ20
- Speed: 50.000 mm / min
- Tension direction: (horizontal) See FIG. 4A, (vertical) See FIG. 4B
- Sample Specification: (Horizontal) See Figs. 5A and 5B, (Vertical) See Figs. 6A and 6B
7A to 7D are photographs showing results of aluminum surface treatment according to Comparative Example 2, and Figs. 8A to 8D are photographs showing results of aluminum surface treatment according to Example 1. Fig.
7B and 8B are photographs showing a surface shape enlarged by a digital magnifying glass (x200), and Figs. 7C and 8C are photographs showing a surface profile enlarged by an electron microscope (X200), and Figs. 7D and 8D are photographs (x5000) showing the bonded surfaces enlarged by an electron microscope.
As can be seen from the comparison of the photographs, when the first anodizing treatment, that is, the general anodizing treatment and the multiple anodizing treatment according to the present invention, that is, the extended anodizing treatment, are compared, the multiple anodizing treatment according to the present invention It can be seen that the shape and roughness of an aluminum surface are large and coarse, and as a result, the bonding area is increased and the bonding force is improved.
(Velocity: 50.000 mm / min, sample width: 12.000 mm, sample thickness: 3.000 mm, sample area: 36.00 mm 2 )
Table 1 shows the results of testing the tensile strength of the horizontal joint injection according to Comparative Example 1, Comparative Example 2 and Example 1. Table 9 shows the tensile strength of the horizontal joint injection according to Comparative Example 1, Comparative Example 2, (E-1 to E-5 are Comparative Example 1, A-1 to A-5 are Comparative Example 2, and EA-1 to EA-5 are Embodiment 1) .
In the case of Comparative Example 1, although the bonding state was maintained immediately after the injection, it was impossible to measure the tensile force easily.
It was confirmed that the bonded injection molding according to Example 1 of the present invention had a larger horizontal tensile force and a higher load at the time of fracture as compared with Comparative Example 2. [
This is because the bonding strength between the different materials was improved by expanding the size and irregular shape of the pores generated through the anodizing surface treatment by using the multi-anodizing process of Example 1.
(Velocity: 50.000 mm / min, sample width: 12.000 mm, sample thickness: 10.000 mm, sample area: 120.00 mm 2 )
Table 2 is a table showing the results of testing the tensile force of the vertical joint injection according to Comparative Example 1, Comparative Example 2 and Example 1, and Table 10 is a table showing the tensile strength of the horizontal joint injection according to Comparative Example 1, Comparative Example 2, (E-1 to E-5 are Comparative Example 1, A-1 to A-5 are Comparative Example 2, and EA-1 to EA-5 are Embodiment 1) .
In the case of Comparative Example 1, although the bonding state was maintained immediately after the injection, it was impossible to measure the tensile force easily.
It was confirmed that the bonded extrudate according to Example 1 of the present invention had higher vertical tensile force and higher load at the time of fracture than Comparative Example 2. [
This is because the bonding strength between the different materials was improved by expanding the size and irregular shape of the pores generated through the anodizing surface treatment by using the multi-anodizing process of Example 1.
As described above, an optimal embodiment has been disclosed in the drawings and specification. Although specific terms have been employed herein, they are used for purposes of illustration only and are not intended to limit the scope of the invention as defined in the claims or the claims. Therefore, those skilled in the art will appreciate that various modifications and equivalent embodiments are possible without departing from the scope of the present invention. Accordingly, the true scope of the present invention should be determined by the technical idea of the appended claims.
100: Aluminum specimen 110: concave and convex
120: Resin 130:
Claims (13)
An irregularity expansion step of expanding the irregularities formed through the second anodizing process on the aluminum plate on which the irregularities are formed;
Fixing the expanded aluminum plate to the mold; And
And forming an injection mold on the aluminum plate using an injection resin,
In the first anodizing step, irregularities are formed by using a DC voltage,
Wherein the second anodizing process extends the unevenness by using an alternating voltage. ≪ RTI ID = 0.0 > 18. < / RTI >
Preparing an aluminum plate as an insert material prior to the first anodizing step;
Degreasing the aluminum plate; And
Further comprising the step of etching the degreased aluminum plate. ≪ RTI ID = 0.0 > 18. < / RTI >
Wherein the first anodizing step uses a sulfuric acid method using a sulfuric acid solution.
The sulfuric acid method is characterized in that a sulfuric acid solution of 120 to 170 g / L is used as an electrolyte and a direct current voltage of 10 to 20 V is applied at a temperature of 15 to 25 degrees for 40 to 50 minutes. Method
Wherein the irregularities formed by the first anodizing process have a diameter of 3 to 5 mu m and a depth of 10 to 15 mu m.
Wherein the first anodizing step uses a phosphoric acid method using a phosphoric acid solution.
The phosphoric acid method is characterized in that a phosphoric acid solution of 250 to 300 g / L is used as an electrolytic solution and a direct current voltage of 20 to 30 V is applied at a temperature of 25 to 35 degrees for 20 to 25 minutes. Method
Wherein the irregularities formed by the first anodizing process have a diameter of 6 to 7 mu m and a depth of 15 to 17 mu m.
Wherein the injection resin comprises a polyamide-based or polyarylamide-based thermoplastic resin.
Wherein the second anodizing step is performed by applying an alternating current of 1 to 3 A per dm to an insert joint injection method
Wherein the concavities and convexities extended by the second anodizing process have a diameter of 8 to 12 탆 and a depth of 30 to 33 탆.
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112721352A (en) * | 2020-12-30 | 2021-04-30 | 中南大学 | Preparation method of metal-plastic mixed structural part based on secondary anodic oxidation method |
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| JPH06272082A (en) * | 1993-03-18 | 1994-09-27 | Nippon Light Metal Co Ltd | Colored film formed on surface of aluminum material and electrolytic coloring method |
| JP2002302795A (en) * | 2001-04-06 | 2002-10-18 | Mitsubishi Alum Co Ltd | Surface treated aluminium material and producing method thereof |
| JP4527196B2 (en) * | 2009-12-24 | 2010-08-18 | 東ソー株式会社 | Composite and production method thereof |
| JP4541153B2 (en) * | 2002-12-16 | 2010-09-08 | コロナインターナショナル株式会社 | Manufacturing method of composite material of aluminum material and synthetic resin molding and composite product thereof |
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2015
- 2015-05-07 KR KR1020150063996A patent/KR101534133B1/en active IP Right Grant
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH06272082A (en) * | 1993-03-18 | 1994-09-27 | Nippon Light Metal Co Ltd | Colored film formed on surface of aluminum material and electrolytic coloring method |
| JP2002302795A (en) * | 2001-04-06 | 2002-10-18 | Mitsubishi Alum Co Ltd | Surface treated aluminium material and producing method thereof |
| JP4541153B2 (en) * | 2002-12-16 | 2010-09-08 | コロナインターナショナル株式会社 | Manufacturing method of composite material of aluminum material and synthetic resin molding and composite product thereof |
| JP4527196B2 (en) * | 2009-12-24 | 2010-08-18 | 東ソー株式会社 | Composite and production method thereof |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN112721352A (en) * | 2020-12-30 | 2021-04-30 | 中南大学 | Preparation method of metal-plastic mixed structural part based on secondary anodic oxidation method |
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