WO2013089090A1 - Led電球用放熱部及びその製造方法 - Google Patents
Led電球用放熱部及びその製造方法 Download PDFInfo
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- WO2013089090A1 WO2013089090A1 PCT/JP2012/082044 JP2012082044W WO2013089090A1 WO 2013089090 A1 WO2013089090 A1 WO 2013089090A1 JP 2012082044 W JP2012082044 W JP 2012082044W WO 2013089090 A1 WO2013089090 A1 WO 2013089090A1
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- Prior art keywords
- plate
- aluminum plate
- led
- molded product
- cylindrical
- Prior art date
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Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F21—LIGHTING
- F21V—FUNCTIONAL FEATURES OR DETAILS OF LIGHTING DEVICES OR SYSTEMS THEREOF; STRUCTURAL COMBINATIONS OF LIGHTING DEVICES WITH OTHER ARTICLES, NOT OTHERWISE PROVIDED FOR
- F21V29/00—Protecting lighting devices from thermal damage; Cooling or heating arrangements specially adapted for lighting devices or systems
- F21V29/50—Cooling arrangements
- F21V29/70—Cooling arrangements characterised by passive heat-dissipating elements, e.g. heat-sinks
- F21V29/74—Cooling arrangements characterised by passive heat-dissipating elements, e.g. heat-sinks with fins or blades
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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
- B29C45/14336—Coating a portion of the article, e.g. the edge of the article
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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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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F21—LIGHTING
- F21V—FUNCTIONAL FEATURES OR DETAILS OF LIGHTING DEVICES OR SYSTEMS THEREOF; STRUCTURAL COMBINATIONS OF LIGHTING DEVICES WITH OTHER ARTICLES, NOT OTHERWISE PROVIDED FOR
- F21V29/00—Protecting lighting devices from thermal damage; Cooling or heating arrangements specially adapted for lighting devices or systems
- F21V29/85—Protecting lighting devices from thermal damage; Cooling or heating arrangements specially adapted for lighting devices or systems characterised by the material
- F21V29/89—Metals
-
- 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
- B29C45/14778—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 the article consisting of a material with particular properties, e.g. porous, brittle
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- 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
- B29K2705/00—Use of metals, their alloys or their compounds, for preformed parts, e.g. for inserts
- B29K2705/02—Aluminium
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F21—LIGHTING
- F21K—NON-ELECTRIC LIGHT SOURCES USING LUMINESCENCE; LIGHT SOURCES USING ELECTROCHEMILUMINESCENCE; LIGHT SOURCES USING CHARGES OF COMBUSTIBLE MATERIAL; LIGHT SOURCES USING SEMICONDUCTOR DEVICES AS LIGHT-GENERATING ELEMENTS; LIGHT SOURCES NOT OTHERWISE PROVIDED FOR
- F21K9/00—Light sources using semiconductor devices as light-generating elements, e.g. using light-emitting diodes [LED] or lasers
- F21K9/20—Light sources comprising attachment means
- F21K9/23—Retrofit light sources for lighting devices with a single fitting for each light source, e.g. for substitution of incandescent lamps with bayonet or threaded fittings
- F21K9/232—Retrofit light sources for lighting devices with a single fitting for each light source, e.g. for substitution of incandescent lamps with bayonet or threaded fittings specially adapted for generating an essentially omnidirectional light distribution, e.g. with a glass bulb
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F21—LIGHTING
- F21Y—INDEXING SCHEME ASSOCIATED WITH SUBCLASSES F21K, F21L, F21S and F21V, RELATING TO THE FORM OR THE KIND OF THE LIGHT SOURCES OR OF THE COLOUR OF THE LIGHT EMITTED
- F21Y2101/00—Point-like light sources
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F21—LIGHTING
- F21Y—INDEXING SCHEME ASSOCIATED WITH SUBCLASSES F21K, F21L, F21S and F21V, RELATING TO THE FORM OR THE KIND OF THE LIGHT SOURCES OR OF THE COLOUR OF THE LIGHT EMITTED
- F21Y2115/00—Light-generating elements of semiconductor light sources
- F21Y2115/10—Light-emitting diodes [LED]
Definitions
- the present invention relates to a heat radiating part for an LED bulb using an LED (Light Emitting Diode) as a light emitting element and a method for manufacturing the same.
- LED Light Emitting Diode
- Patent Document 1 discloses an LED bulb heat dissipation part obtained by drawing and knurling an aluminum blank. Not limited to this example, the LED bulb heat radiating section is usually manufactured by drawing, stretching, or die casting.
- the present invention has been made to solve the above-described problems, and achieves the following object.
- the objective of this invention is providing the thermal radiation part for LED bulbs which can be manufactured by a simple and low-cost method.
- the heat radiation part for LED bulbs of the present invention 1 A cylindrical LED bulb heat dissipation part (1, 1b), It is configured by combining a plurality of aluminum plates (plate members 110, 150), Each aluminum plate is joined to another aluminum plate via a resin molded product (30, 30b).
- the heat radiation part for LED bulbs of the present invention 2 A tubular LED bulb heat dissipation part (1a), It is composed of one aluminum plate material (plate-like member 120) that is bent into a cylindrical shape, The both ends (engagement part 123) of the said aluminum plate material are mutually joined via the resin molded product (35).
- the heat radiation part for LED bulbs of the present invention 3 is It is the heat radiation part for LED bulbs of the present invention 1 or 2 (1, 1b),
- the resin molded product is a glove fixing part (40) for fixing a translucent glove (50) covering an LED.
- the heat radiation part for LED bulbs of the present invention 4 is It is the heat radiation part (1b) for LED bulbs of the present invention 1 or 2,
- the resin molded product is a base fixing portion (180) for fixing the base (60).
- the heat radiation part for LED bulbs of the present invention 5 It is the heat radiation part for LED bulbs (1, 1a, 1b) of the present invention 1 or 2,
- the surface of the aluminum plate (plate members 110, 120, 150) is covered with ultra fine irregularities with a period of 20 to 80 nm, or ultra fine concaves or convexes with a diameter of 20 to 80 nm
- the said resin molded product is comprised by the resin composition containing 1 or more types selected from polybutylene terephthalate, polyphenylene sulfide, and a polyamide resin, It is characterized by the above-mentioned.
- the manufacturing method of the heat radiation part for LED bulbs of this invention 6 is as follows. A plurality of aluminum plate materials are immersed in a water-soluble amine compound aqueous solution, and the surface is covered with ultrafine irregularities having a period of 20 to 80 nm, or ultrafine concaves or convexes having a diameter of 20 to 80 nm, and the amine is formed on the surface.
- An etching process for adsorbing a chemical compound Combining a plurality of aluminum plates that have undergone the etching process, inserting them into a mold for injection molding as a cylinder, and at least one selected from polybutylene terephthalate, polyphenylene sulfide, and polyamide resin on the surface of the plurality of aluminum plates
- the manufacturing method of the heat radiation part for LED bulbs of this invention 7 is One aluminum plate material that has been bent into a cylindrical shape is immersed in an aqueous solution of a water-soluble amine compound, and the surface thereof is ultrafine irregularities with a period of 20 to 80 nm, or ultrafine recesses or ultrafine protrusions with a diameter of 20 to 80 nm.
- FIG. 1 is a diagram showing a processing step of an aluminum blank.
- FIG. 2 is a diagram showing a processing step of an aluminum blank.
- Drawing 3 is a figure showing the process of manufacturing the heat sink for LED bulbs using a plurality of aluminum board materials.
- FIG. 4 is a cross-sectional view showing a process of joining a plurality of aluminum plate members by injection joining.
- FIG. 5 is a view showing the LED bulb heat dissipation portion according to the first embodiment.
- FIG. 6 is a cross-sectional view of the LED bulb heat dissipation portion according to the first embodiment.
- FIG. 7 is a diagram showing a process of fixing a translucent glove to the LED bulb heat dissipation part.
- FIG. 8 is a diagram showing a process of manufacturing a heat radiating part for an LED bulb using one aluminum plate material.
- FIG. 9 is a diagram illustrating a process of joining both end portions of one aluminum plate member with a resin molded product.
- FIG. 10 is a diagram illustrating an LED bulb heat dissipation portion according to the second embodiment.
- FIG. 11 is a diagram showing a processing step of an aluminum blank.
- FIG. 12 is a diagram illustrating a process of manufacturing a heat radiating part for an LED bulb using a plurality of aluminum plate materials.
- FIG. 13 is a cross-sectional view showing a process of joining a plurality of aluminum plate members by injection joining.
- FIG. 14 is a diagram illustrating a process of fixing the base to the LED bulb heat dissipation portion.
- FIG. 1A shows a flat aluminum blank material (hereinafter referred to as “blank material”) 100.
- the blank material 100 for example, a commercially available aluminum plate made of A1050 or A5052 can be used.
- the blank material 100 is subjected to die press molding to form a fan portion 112 having a concavo-convex shape including a convex portion 112a and a concave portion 112b as shown in FIG.
- the mold press molding performed here is not drawing or stretch molding using punches and dies, but, as shown in FIG. 2, a lower mold 3 and an upper mold 4 obtained by processing a hard metal such as steel.
- the blank material 100 is sandwiched between the upper mold 4 and the upper mold 4 is pushed to the deepest position of the lower mold 3 to be plastically deformed into a desired shape.
- the lower mold has a recess 3b that is recessed downward from the upper surface 3a
- the upper mold 4 has a protrusion 4b that protrudes downward from the lower surface 4a. Yes.
- FIG. 2A the lower mold has a recess 3b that is recessed downward from the upper surface 3a
- the upper mold 4 has a protrusion 4b that protrudes downward from the lower surface 4a. Yes.
- the blank material 100 is sandwiched between the convex portions 4b and the concave portions 3b, and the convex portions 4b are pushed to the deepest position of the concave portions 3b, as shown in FIG. 2 (c).
- the fan 112 having the concave portions 112b and the convex portions 112a alternately arranged in a fan shape is formed.
- the concavo-convex shape is formed by die press molding.
- the concavo-convex shape may be formed by knurling.
- a knurling process may be performed by a cutting knurling tool, or a knurling process by stamping and rolling may be performed.
- the outer peripheral surface A knurled process may be applied to form a concavo-convex shape.
- corrugated shape in the range used as the outer peripheral surface of the cylindrical body shown above is not an essential process.
- the blank member 100 is trimmed by a trim die without performing die press molding or the like, and a plate-like member having no uneven shape (for example, a rectangular shape)
- a plate-like member made up of the portion 111 and a fan portion that does not have a concavo-convex shape may be used to create a heat sink for an LED bulb.
- the plate material formed with the fan part 112 by the above-described die press molding is trimmed with a trim die (not shown) to obtain the plate-like member 110 composed of the fan part 112 and the flat rectangular part 111 connected to the fan part 112. .
- the rectangular part 111 is located in the center part of a fan, and is a part which comprises the cylindrical part 10 in the thermal radiation part 1 for LED bulbs.
- the fan part 112 is a part which comprises the taper part 20 in the thermal radiation part 1 for LED bulbs.
- V-bending is performed to incline the rectangular portion 111 by a predetermined angle from the root (boundary portion with the fan portion 112) to the convex portion 112a side of the fan portion 112. 2) Further, an R-bending process is performed so that the rectangular portion 111 subjected to the V-bending process has a semicylindrical shape.
- the entire plate-like member 110 including the fan part 112 is made into a semi-cylindrical part.
- the order of the V bending process and the R bending process may be reversed.
- two semi-cylindrical plate-like members 110 are used, A cylindrical body is formed by bringing both end portions of the two members into close contact with each other.
- a thermoplastic resin for injection molding is injected into a region including the joint portion (boundary line between the plate-like members 110 and 110) on the inner peripheral surface of the cylindrical body configured as described above, and is shown in FIG. As described above, the plate-like members 110 and 110 are joined and integrated by the resin molded products 30 and 30.
- the present inventors firmly joined the surfaces of the resin molded product 30 and the plate-like member 110 by NMT (Nano molding technology) described later.
- NMT Nemo molding technology
- the globe fixing portion 40 is also molded on the outer peripheral surface of the cylindrical body.
- the globe fixing portion 40 is also firmly joined to the surface of the plate-like member 110 by NMT.
- the globe fixing part 40 is a ring-shaped resin molded product surrounding the outer peripheral surface of the cylindrical body. Since the inner peripheral surface of the ring is formed of a body that is in close contact with the outer peripheral surfaces of both plate-like members 110, the two plate-like members 110 are integrated with each other through the globe fixing portion 40.
- NMT is a technology developed by the present inventors, and is a known technology as shown in Patent Documents 2 and 3.
- NMT is a joining technique between aluminum and a resin composition. After a predetermined surface treatment is applied to aluminum, it is inserted into an injection mold, and a molten engineering resin is injected into the mold. Thus, the resin part is molded and at the same time, the molded product and aluminum are joined (hereinafter abbreviated as “injection joining”).
- the aluminum surface is covered with ultra fine irregularities having a period of 20 to 80 nm (preferably 20 to 50 nm), or ultra fine recesses or ultra fine protrusions having a diameter of 20 to 80 nm (preferably a diameter of 20 to 50 nm). thing.
- ultra fine irregularities having an RSm of 20 nm to 80 nm.
- RSm is the average length of contour curve elements defined in Japanese Industrial Standards (JIS B 0601: 2001, ISO 4287: 1997)
- Rz is Japanese Industrial Standards (JIS B 0601: 2001, ISO 4287: 1997) Is the maximum height specified.
- the surface layer of aluminum is a thin layer of aluminum oxide, and the thickness is preferably 3 nm or more.
- Ammonia, hydrazine, or a water-soluble amine compound is chemically adsorbed on the aluminum surface before injection joining.
- the main component is a hard crystalline thermoplastic resin that can react with a broadly defined amine compound such as ammonia, hydrazine, or water-soluble amines at 150 to 200 ° C.
- a resin composition containing polybutylene terephthalate (PBT), polyphenylene sulfide (PPS), polyamide resin or the like as a main component is a resin composition containing polybutylene terephthalate (PBT), polyphenylene sulfide (PPS), polyamide resin or the like as a main component.
- PBT polybutylene terephthalate
- PPS polyphenylene sulfide
- polyamide resin polyamide resin
- a shaped aluminum part (for example, the plate-like member 110 having a semi-cylindrical shape in the present embodiment) is put into a degreasing tank to perform a degreasing operation.
- the surface layer is dissolved by immersing in a caustic soda aqueous solution having a concentration of several percent, and the dirt that cannot be removed by the degreasing operation is removed together with the aluminum surface layer.
- it is immersed in an aqueous nitric acid solution having a concentration of several percent to neutralize and remove sodium ions and the like adhering to the surface in the previous operation.
- the operation up to this point is an operation for making the surface of the aluminum part a clean surface that is structurally and chemically stable. If the aluminum parts are clean and free from dirt and corrosion, these pretreatment operations can be omitted.
- NMT The important processes in NMT are as follows.
- an aluminum part is immersed in an aqueous solution of a water-soluble amine compound under suitable conditions, and the surface of the part is etched to form ultrafine irregularities with a period of 20 to 80 nm, and the amine compound is chemisorbed simultaneously.
- ultra-fine etching in which an aluminum part is immersed in an aqueous hydrazine solution with a concentration of 1 to several percent at 45 to 65 ° C. for 1 to several minutes, ultra fine irregularities with a period of 20 to 40 nm are formed on the aluminum surface. It is formed.
- the aluminum parts are thoroughly washed with ion-exchanged water and dried at 50 to 70 ° C., so that they are suitable for injection joining in which chemical adsorption of hydrazine is observed.
- the following surface treatment was performed on the plate-like member 110 made of A5052 having a semi-cylindrical shape.
- an aqueous solution containing 7.5% of an aluminum degreasing agent “NE-6” liquid temperature 60 ° C.
- NE-6 liquid temperature 60 ° C.
- a degreasing tank containing this degreasing solution was prepared. It was immersed and washed with water.
- an aqueous solution (40 ° C.) containing hydrochloric acid 1% was prepared in another tank, and this tank was used as a preliminary pickling tank. The plate member 110 was immersed in this preliminary pickling tank for 1 minute and washed with ion-exchanged water.
- an aqueous solution containing 1.5% of caustic soda (liquid temperature 40 ° C.) was prepared in another tank, and the soot was used as an etching tank.
- the plate member 110 was immersed in this etching tank for 1 minute and washed with ion exchange water.
- a 3% concentration aqueous nitric acid solution (40 ° C.) was prepared in another tank, and this soot was used as a neutralization tank.
- the plate member 110 was immersed in this neutralization tank for 1 minute and washed with ion exchange water.
- an aqueous solution (60 ° C.) containing 3.5% of hydrated hydrazine was prepared in another bowl, and this was used as an NMT treatment tank.
- the said plate-shaped member 110 was immersed in the NMT processing tank for 1 minute, and was washed with ion-exchange water. Next, it was placed in a hot air dryer at 67 ° C. for 15 minutes and dried. The obtained plate-like member 110 was tightly wrapped with aluminum foil, further sealed in a plastic bag, and stored.
- the surface of the plate-like member 110 subjected to the above treatment was observed with an electron microscope, the surface was covered with innumerable ultrafine recesses, and the diameter of the recesses was 20 to 40 nm. In addition, the presence of nitrogen could be confirmed by XPS observation.
- the plate-like members 110 subjected to such surface treatment are paired to form a cylindrical body, and the cylindrical body is inserted into the injection mold 5 as shown in FIG. 4 to perform injection joining.
- the injection mold 5 in this embodiment is composed of a first lower mold 6a, a second lower mold 6b, and an upper mold 7 having a convex portion 7a as shown in FIG. 4 (a).
- the two semi-cylindrical plate-like members 110 subjected to the surface treatment are inserted into recesses formed by combining the first lower mold 6a and the second lower mold 6b. .
- two semi-cylindrical plate-like members 110 are paired to constitute a cylindrical body.
- the convex portion 7a is inserted into the concave portion, and the upper mold 7 is placed on the top surfaces of the first lower mold 6a and the second lower mold 6b. Accordingly, as shown in FIG. 4A, the first lower mold 6a and the second lower mold 6b, the upper mold 7, and the two plate-like members inserted into the injection mold 5 110 forms a cavity 6c. As shown in FIG. 4A, the formed cavity 6c has an elongated columnar shape along the boundary line of the inner peripheral surface of the plate-like member 110 that is a cylindrical body, and a portion that becomes the maximum diameter of the cylindrical body.
- the ring shape surrounding the outer peripheral surface of the plate-like members 110 and 110 shown in the drawing has a combined shape.
- the first lower mold 6a, the second lower mold 6b, and the upper mold 7 are separated from each other in the vertical direction, and the first lower mold 6a and the second lower mold 6b are separated from each other in the left and right directions.
- a cylindrical LED bulb heat radiation portion 1 having both ends opened is obtained.
- the LED bulb heat dissipation portion 1 covers two plate-like members 110 that have been bent into a semi-cylindrical shape and a joining line on the inner peripheral surface side of both the plate-like members 110. It consists of a resin molded product 30 joined to the peripheral surface and a ring-shaped glove fixing part 40 surrounding the outer peripheral surface of both plate-like members 110 and joined to the outer peripheral surface of both plate-like members 110.
- the resin composition constituting the resin molded product 30 is cured in a state where the resin composition penetrates into the ultrafine recesses having a diameter of 20 nm to 40 nm formed on the inner peripheral surfaces of the two plate-like members 110, thereby It is joined.
- the resin composition constituting the globe fixing portion 40 is cured in a state where the resin composition penetrates into an ultrafine concave portion having a diameter of 20 nm to 40 nm formed on the outer peripheral surface of the both plate-like members 110, whereby the both plate-like members 110.
- the two plate-like members 110 are joined by the resin molded product 30 and the globe fixing portion 40, but the two plate-like members 110 are only attached by either one of the resin molded product 30 or the globe fixing portion 40. You may make it join.
- FIG. 5 (a) is a plan view of the heat radiating part 1 for LED bulbs obtained by injection joining
- FIG. 5 (b) is a front view
- FIG. 5 (c) is a bottom view.
- the LED bulb heat dissipating part 1 is a cylindrical body having openings at both ends, and the diameter (hereinafter referred to as “large opening”) of one end (the lower end in FIG. 5B) where the globe fixing part 40 is provided. Is larger than the diameter of the opening (hereinafter referred to as “small opening”) at the other end (the upper end in FIG. 5B).
- the cylindrical body is a taper in which a cylindrical portion 10 in which two rectangular portions 111 that are R-bent processed in a semi-cylindrical shape are paired and two fan portions 112 that are R-shaped in a semi-cylindrical shape are paired.
- the taper portion 20 has a predetermined taper angle that decreases in diameter from one end to the other end.
- FIG. 6 is a cross-sectional view of the LED bulb heat radiating section 1 along AA.
- a resin molded product 30 is molded along the joining line from one end of the inner peripheral surface to the other end.
- the resin molded product 30 is bent along the taper angle formed by the tapered portion 20 and the cylindrical portion 10, covers the end of the plate-like member 110 that forms an opening at one end, and is integrated with the globe fixing portion 40.
- the resin molded product 30 and the globe fixing portion 40 are integrally molded injection-molded products, and are obtained by one injection molding.
- the resin molded product 30 and the globe fixing part 40 may be separated injection molded products.
- the LED is fixed to the large opening side of the heat radiating part 1 for the LED bulb thus created through a mounting member (not shown).
- the LED is covered with a globe 50 fixed to the large opening side.
- the globe 50 has translucency, and is formed in a substantially hemispherical shape having an opening at the end 50a, for example, by a material such as transparent glass or synthetic resin.
- FIG. 7 shows an end view including the top of the globe 50.
- a thread 50 b is formed along the inner peripheral surface of the end 50 a of the globe 50.
- the globe 50 When the globe 50 is fixed to the large opening side, the globe 50 is rotated in the circumferential direction, and the thread 50b formed on the inner peripheral surface of the end portion 50a and the outer peripheral surface of the LED bulb heat radiating portion 1 are formed.
- the thread groove 40a is screwed together.
- the LED is positioned at the opening of the globe 50 and is covered by the globe 50.
- the glove fixing part 40 is injection-molded together, so that a mechanism and an adhesive for fixing the glove 40 become unnecessary, and the manufacturing cost is reduced. Can be reduced.
- the end portions of the two plate-like members 110 are joined by injection joining.
- the end portions of the two plate-like members 110 are subjected to bending processing or the like. Both ends may be fixed using a resin molded product prepared in advance.
- the globe 50 is fixed by the thread groove 40a.
- an insertion hole may be provided to fix the globe 50.
- injection joining is performed so that the entire outer peripheral surface of the cylindrical portion 10 or the tapered portion 20 is covered with the resin composition, and a resin molded product that covers the entire outer peripheral surface of the cylindrical portion 10 or the tapered portion 20 is formed.
- the resin composition for injection joining can be used as the coating material for the cylindrical portion 10 and the tapered portion 20.
- FIG.10 (a) is a top view of the thermal radiation part 1a for LED bulbs concerning 2nd Embodiment
- FIG.10 (b) is a front view
- FIG.10 (c) is a bottom view.
- the LED bulb heat dissipating part 1a according to the second embodiment is composed of one plate-like member 120 as shown in FIG.
- a blank material 100 similar to that of the first embodiment is trimmed by a trim mold (not shown) to obtain a plate member 120 including a flat fan part 122 and a flat rectangular part 121 connected to the fan part 122.
- corrugated shape is not provided in the fan part 122, but the whole surface of the plate-shaped member 120 is flat.
- a U-shaped bending process is performed on both ends of the flat plate-shaped member 120 (the end where no opening is formed in a state where the O-bending process is performed) to provide a hook-shaped engagement portion 123.
- the rectangular portion 121 is moved from the root (boundary portion with the fan portion 122) to the outer peripheral surface side of the fan portion 122 (when the LED bulb heat radiating portion 1a is completed, the tapered portion 21 is formed.
- O-bending is performed so that the rectangular portion 121 subjected to the V-bending becomes a cylindrical shape.
- the plate member 120 is formed into a cylindrical body having openings at both ends by such O bending.
- the bottom surfaces 123a of the engaging portions 123 and 123 at both ends of the plate-like member 120 are brought into close contact with each other to form a T shape.
- the resin molded product 35 having a T-shaped groove that has been created in advance by injection molding or the like and the plate-like member 120 that is a cylindrical body are assembled to complete the LED bulb heat dissipation portion 1 a. .
- the LED bulb heat dissipating part 1a is a cylindrical body having openings at both ends, and the diameter of one end (the lower end in FIG. 10B) (hereinafter referred to as “large opening”) is the other end (FIG. 10). It is larger than the diameter of the opening (hereinafter referred to as “small opening”) in (b).
- the said cylindrical body consists of the cylindrical part 11 in which the rectangular part 121 was O-bent processed cylindrically, and the taper part 21 in which the fan part 122 was O-bent processed cylindrically.
- the taper portion 21 has a predetermined taper angle that decreases in diameter from one end to the other end.
- the LED bulb heat dissipating part 1a among the end parts of one plate-like member 120 that is bent into a cylindrical shape 0, end parts that form openings at both ends The other ends are joined together to form a cylindrical body.
- An engaging portion 125 that becomes a joint portion of the inner peripheral surface from the cylindrical portion 11 to the tapered portion 21 is fixed by an elongated columnar resin molded product 35.
- the resin molded product 35 is bent along the taper angle formed by the tapered portion 21 and the cylindrical portion 11.
- the resin molded product 35 is not limited to an injection molded product, and may be obtained by extrusion molding or pultrusion molding.
- the resin composition constituting the resin molded product 35 includes a predetermined ratio of elastomer so as to be bent along the taper angle.
- the end parts may be joined by injection joining as in the first embodiment, or an injection molded ring. You may make it make it join by a glove
- FIGS. 11 to 13 are diagrams showing a manufacturing process of the LED bulb heat dissipating part 1b according to the third embodiment of the present invention.
- the LED bulb heat dissipating part 1b according to the third embodiment includes a plurality of plate-like members 150, as in the first embodiment.
- the plate-like member 150 is not formed with an uneven shape, and the entire surface of the plate-like member 150 is flat.
- the LED bulb heat dissipation portion 1b according to the third embodiment is different from the LED bulb heat dissipation portions 1 and 1a according to the first embodiment and the second embodiment in order to fix the base 60 as shown in FIG.
- the base fixing part 180 is provided.
- the blank material 100 is trimmed by a trim mold (not shown), and is formed of a flat fan portion 113 and a flat rectangular portion 111 connected to the fan portion 113.
- a shaped member 150 is obtained.
- the rectangular part 111 is located in the center part of a fan, and is a part which comprises the cylindrical part 10 in the thermal radiation part 1b for LED bulbs.
- the fan part 113 is a part which comprises the taper part 25 in the thermal radiation part 1b for LED bulbs.
- the rectangular portion 111 is moved from the root (boundary portion with the fan portion 113) to the outer peripheral surface side of the fan portion 113 (when the LED bulb heat radiating portion 1b is completed, the tapered portion 25 is formed.
- an R-bending process is performed so that the rectangular part 111 subjected to the V-bending process becomes a semi-cylindrical shape.
- the order of the V bending process and the R bending process may be reversed.
- the entire plate-like member 150 including the fan portion 113 is made a semi-cylindrical component.
- FIG. 12B two semi-cylindrical plate-like members 150 are used, A cylindrical body is formed by bringing both end portions of the two members into close contact with each other.
- thermoplastic resin for injection molding is injected into a region including a joint portion (boundary line between the plate-like members 150 and 150) on the inner peripheral surface of the cylindrical body configured as described above, and as in the first embodiment, As shown in FIG. 12C, the plate-like members 150 and 150 are joined and integrated by the resin molded products 30b and 30b. Furthermore, in 3rd Embodiment, in the case of injection joining, in addition to the glove
- an injection mold 5 ′ includes a first lower mold 6a ′, a second lower mold 6b ′, and an upper mold 7 ′ having a convex portion 7a ′.
- the above-described NMT surface treatment was performed in the recess formed by combining the first lower mold 6a ′ and the second lower mold 6b ′.
- One half cylindrical plate-like member 150 is inserted.
- two semi-cylindrical plate members 150 are paired to form a cylindrical body.
- the convex portion 7a ' is inserted into the concave portion, and the upper mold 7' is placed on the top surfaces of the first lower mold 6a 'and the second lower mold 6b'.
- a cavity 6 c ′ is formed by the two plate-like members 150.
- the difference from the injection mold 5 in the first embodiment is that a ring-shaped cavity (a part of the cavity 6c ′) is formed along the inner peripheral surface of the portion (111, 111 in the figure) constituting the cylindrical portion 10. Is formed, and the cavity extends below a portion constituting the cylindrical portion 10.
- a base fixing portion 180 is formed by the resin flowing into the ring-shaped cavity.
- the cavity 6c ′ formed in the third embodiment is an outer peripheral surface of a portion (the upper ends of the plate-like members 150 and 150 shown in the figure) that becomes the maximum diameter of the cylindrical body.
- a resin composition for example, the aforementioned PPS resin “SGX120”
- the resin composition has a spool 8 a provided in the upper mold 7 ′. Via, it flows into the runner 8b formed by the top surfaces of the first lower mold 6a ′ and the second lower mold 6b ′ and the upper mold 7 ′, and reaches the gate 8c.
- the resin composition supplied from the gate 8c is molded in the cavity.
- a resin molded product 30b made of the above resin composition is obtained, and a glove fixing part 40 made of the same resin composition as in the first embodiment is obtained.
- a base made of the same resin composition is obtained.
- the fixing part 180 is obtained. As shown in FIG. 14, a thread groove 40 a is formed in the globe fixing portion 40. Further, as shown in FIG. 14, a screw groove 180 a is also formed in the base fixing portion 180.
- the first lower mold 6a ′, the second lower mold 6b ′, and the upper mold 7 ′ are separated vertically, and the first lower mold 6a ′ and the second lower mold 6b ′ are separated left and right.
- the cylindrical LED bulb thermal radiation part 1b which the both ends opened is obtained.
- the LED bulb heat-radiating part 1b covers the two plate-like members 150 that have been bent into a semi-cylindrical shape and the joining line on the inner peripheral surface side of the tapered part 25, and is joined to the inner peripheral surface of the tapered part 25.
- the resin molded product 30b, the ring-shaped glove fixing part 40 that surrounds the outer peripheral surfaces of both plate-like members 150 and is joined to the outer peripheral surfaces of both plate-like members 150, and the entire inner peripheral surface of the cylindrical portion 110 It comprises a ring-shaped base fixing part 180 that covers (including the joining line) and extends from the cylindrical part 110 to the outside (upward in FIG. 14).
- a screw groove 180a is formed on the outer periphery of the portion extending from the cylindrical portion 110 of the base fixing portion 180 by injection molding.
- the resin composition constituting the resin molded product 30b is bonded to the two plate-like members 150 by curing in a state where the resin composition 30b penetrates into an ultrafine recess having a diameter of 20 nm to 40 nm formed on the inner peripheral surface of the tapered portion 25. ing.
- the resin composition constituting the globe fixing portion 40 is cured in a state where the resin composition penetrates into the ultrafine recesses having a diameter of 20 nm to 40 nm formed on the outer peripheral surfaces of the both plate-like members 150, whereby the both plate-like members 150. Are joined.
- the resin composition constituting the base fixing part 180 is cured in a state in which it enters into an ultrafine concave part having a diameter of 20 nm to 40 nm formed on the inner peripheral surface of the cylindrical part 10, so that both plate-like members 150 are formed. It is joined.
- the resin molded product 30b, the globe fixing part 40, and the base fixing part 180 are integrally formed injection-molded articles, and are obtained by one injection molding.
- the resin molded product 30b, the globe fixing portion 40, and the base fixing portion 180 may be injection molded products separated from each other.
- the structure of the LED bulb heat dissipation part 1b according to the third embodiment obtained in this manner is the same as that of the first embodiment except that the fan 113 is not provided with irregularities and the base fixing part 180 is provided. It is the same as that of the heat sink 1 for LED bulbs.
- the two plate-like members 150 are joined by the resin molded product 30b, the globe fixing portion 40, and the base fixing portion 180, but the two plate-like members 150 are joined by any of these. You may do it.
- the base 60 is fixed to the ring-shaped base fixing part 180 forming the small opening of the LED bulb heat radiation part 1b.
- the base 60 is rotated in the circumferential direction, and a screw thread formed on the inner peripheral surface of the base 60 and a screw groove 180a formed on the outer peripheral surface of the base fixing portion 180 Screw together.
- the globe 40 and the base 60 are fixed by injection molding the globe fixing part 40 and the base fixing part 180 together. This eliminates the need for a mechanism and an adhesive, and reduces the manufacturing cost.
- injection joining is performed so that the entire outer peripheral surface of the cylindrical portion 10 or the tapered portion 25 is covered with the resin composition, and a resin molded product that covers the entire outer peripheral surface of the cylindrical portion 10 or the tapered portion 25 is formed.
- the resin composition for injection joining can be used as the coating material for the cylindrical portion 10 and the tapered portion 25.
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- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Manufacturing & Machinery (AREA)
- Mechanical Engineering (AREA)
- Injection Moulding Of Plastics Or The Like (AREA)
- Non-Portable Lighting Devices Or Systems Thereof (AREA)
- Securing Globes, Refractors, Reflectors Or The Like (AREA)
- Arrangement Of Elements, Cooling, Sealing, Or The Like Of Lighting Devices (AREA)
- Moulds For Moulding Plastics Or The Like (AREA)
Abstract
Description
筒状のLED電球用放熱部(1,1b)であって、
複数のアルミニウム板材(板状部材110,150)を組み合わせることにより構成され、
各アルミニウム板材が、樹脂成形品(30,30b)を介して他のアルミニウム板材と接合されていることを特徴とする。
筒状のLED電球用放熱部(1a)であって、
筒状に曲げ加工が施された1のアルミニウム板材(板状部材120)により構成され、
当該アルミニウム板材の両端部(係合部123)が、樹脂成形品(35)を介して相互に接合されていることを特徴とする。
本発明1又は2のLED電球用放熱部(1,1b)であって、
前記樹脂成形品は、LEDを覆う透光性のグローブ(50)を固定するためのグローブ固定部(40)であることを特徴とする。
本発明1又は2のLED電球用放熱部(1b)であって、
前記樹脂成形品は、口金(60)を固定するための口金固定部(180)であることを特徴とする。
本発明1又は2のLED電球用放熱部(1,1a,1b)であって、
前記アルミニウム板材(板状部材110,120,150)の表面は、20~80nm周期の超微細凹凸、又は直径20~80nmの超微細凹部若しくは超微細凸部で覆われており、
前記樹脂成形品は、ポリブチレンテレフタレート、ポリフェニレンサルファイド、及びポリアミド樹脂から選択される1種以上を含む樹脂組成物により構成されていることを特徴とする。
複数のアルミニウム板材を水溶性アミン系化合物水溶液に浸漬し、その表面を20~80nm周期の超微細凹凸、又は直径20~80nmの超微細凹部若しくは超微細凸部で覆い、且つその表面に前記アミン系化合物を吸着させるエッチング工程と、
前記エッチング工程を経た複数のアルミニウム板材を組み合わせ、筒状として射出形成用金型にインサートし、これら複数のアルミニウム板材の表面にポリブチレンテレフタレート、ポリフェニレンサルファイド、及びポリアミド樹脂から選択される1種以上を含む樹脂組成物を射出して、射出成形を行うと共に、当該樹脂組成物を介して前記複数のアルミニウム板材を接合させる射出接合工程と、
を含むことを特徴とする。
筒状に曲げ加工が施された1のアルミニウム板材を水溶性アミン系化合物水溶液に浸漬し、その表面を20~80nm周期の超微細凹凸、又は直径20~80nmの超微細凹部若しくは超微細凸部で覆い、且つその表面に前記アミン系化合物を吸着させるエッチング工程と、
前記エッチング工程を経たアルミニウム板材を射出形成用金型にインサートし、そのアルミニウム板材の表面にポリブチレンテレフタレート、ポリフェニレンサルファイド、及びポリアミド樹脂から選択される1種以上を含む樹脂組成物を射出して、射出成形を行うと共に、当該樹脂組成物を介して前記アルミニウム板材の両端部を相互に接合させる射出接合工程と、
を含むことを特徴とする。
図1から図3は、本発明の第1実施形態に係るLED電球用放熱部1の製造工程を示す図である。図1(a)には、平板状のアルミニウム製ブランク材(以下「ブランク材」と称す)100を示す。ブランク材100として、例えばA1050やA5052製の市販のアルミニウム板材を使用することができる。このブランク材100に対して、金型プレス成形を施して図1(b)に示すような凸部112a及び凹部112bからなる凹凸形状を有する扇部112を成形する。
NMTは本発明者らが開発した技術であり、特許文献2及び3に示すように公知の技術である。NMTとは、アルミニウムと樹脂組成物との接合技術であり、アルミニウムに対して所定の表面処理を施した後、射出成形用金型内にインサートし、当該金型内に溶融したエンジニアリング樹脂を射出して樹脂部分を成形すると同時に、その成形品とアルミニウムとを接合する方法(以下、略称して「射出接合」という。)である。
(1)アルミニウム表面が20~80nm周期(好ましくは20~50nm周期)の超微細凹凸、又は直径20~80nm(好ましくは直径20~50nm)の超微細凹部又は超微細凸部で覆われていること。指標としては、RSmが20nm~80nmである超微細凹凸で覆われていると良い。また、Rzが20~80nmの超微細凹部又は超微細凸部で覆われていても良い。さらに、RSmが20nm~80nmであり、且つRzが20~80nmの超微細凹凸で覆われていても良い。RSmは、日本工業規格(JIS B 0601:2001, ISO 4287:1997)に規定される輪郭曲線要素の平均長さであり、Rzは、日本工業規格(JIS B 0601:2001, ISO 4287:1997)に規定される最大高さである。ここで、アルミニウムの表層は酸化アルミニウムの薄層であり、その厚さは3nm以上であると良い。
(2)射出接合前のアルミニウム表面に、アンモニア、ヒドラジン、又は水溶性アミン化合物が化学吸着していること。
(3)硬質の結晶性熱可塑性樹脂であって、150~200℃でアンモニア、ヒドラジン、又は水溶性アミン類等の広義のアミン系化合物と反応し得る樹脂を主成分とすること。具体的には、ポリブチレンテレフタレート(PBT)、ポリフェニレンサルファイド(PPS)、又はポリアミド樹脂等が主成分として含まれている樹脂組成物であること。例えば、市販のPPS樹脂「SGX120」(株式会社 東ソー製)を好適に使用できる。
図3(d)に示すように半筒状としたA5052製の板状部材110に対して、以下の表面処理を施した。まず、アルミ用脱脂剤「NE-6」を7.5%含む水溶液(液温60℃)を脱脂液とし、この脱脂液を入れた脱脂槽を用意し、これに板状部材110を5分浸漬し、水洗した。次いで別の槽に塩酸1%を含む水溶液(40℃)を用意し、この槽を予備酸洗槽とした。この予備酸洗槽に前記板状部材110を1分浸漬しイオン交換水で水洗した。
図8及び図9は、本発明の第2実施形態に係るLED電球用放熱部1aの製造工程を示す図である。また、図10(a)は、第2実施形態に係るLED電球用放熱部1aの平面図であり、図10(b)は正面図であり、図10(c)は底面図である。第2実施形態に係るLED電球用放熱部1aは、図8(a)に示すように、1の板状部材120により構成される。第1実施形態と同様のブランク材100をトリム型(図示せず)によってトリミングして、平坦な扇部122及び扇部122と連なる平坦な長方形部121からなる板状部材120を得る。第2実施形態では扇部122に凹凸形状を設けておらず、板状部材120の全面がフラットである。なお、扇部122に第1実施形態と同様の凹凸形状を設けるようにしても良い。
図11~図13は、本発明の第3実施形態に係るLED電球用放熱部1bの製造工程を示す図である。第3実施形態に係るLED電球用放熱部1bは、第1実施形態と同様に、複数の板状部材150によって構成される。ただし、第1実施形態と異なり板状部材150には凹凸形状が形成されておらず、板状部材150の全面がフラットである。また、第3実施形態に係るLED電球用放熱部1bは、第1実施形態及び第2実施形態に係るLED電球用放熱部1,1aと異なり、図14に示すように口金60を固定するための口金固定部180を備える。
10…円筒部
20…テーパ部
30…樹脂成形品
40…グローブ固定部
50…グローブ
110…板状部材
111…長方形部
112…扇部
Claims (7)
- 筒状のLED電球用放熱部であって、
複数のアルミニウム板材を組み合わせることにより構成され、
各アルミニウム板材が、樹脂成形品を介して他のアルミニウム板材と接合されていることを特徴とするLED電球用放熱部。 - 筒状のLED電球用放熱部であって、
筒状に曲げ加工が施された1のアルミニウム板材により構成され、
当該アルミニウム板材の両端部が、樹脂成形品を介して相互に接合されていることを特徴とするLED電球用放熱部。 - 請求項1又は2に記載したLED電球用放熱部であって、
前記樹脂成形品は、LEDを覆う透光性のグローブを固定するためのグローブ固定部であることを特徴とするLED電球用放熱部。 - 請求項1又は2に記載したLED電球用放熱部であって、
前記樹脂成形品は、口金を固定するための口金固定部であることを特徴とするLED電球用放熱部。 - 請求項1又は2に記載したLED電球用放熱部であって、
前記アルミニウム板材の表面は、20~80nm周期の超微細凹凸、又は直径20~80nmの超微細凹部若しくは超微細凸部で覆われており、
前記樹脂成形品は、ポリブチレンテレフタレート、ポリフェニレンサルファイド、及びポリアミド樹脂から選択される1種以上を含む樹脂組成物により構成されていることを特徴とするLED電球用放熱部。 - 複数のアルミニウム板材を水溶性アミン系化合物水溶液に浸漬し、その表面を20~80nm周期の超微細凹凸、又は直径20~80nmの超微細凹部若しくは超微細凸部で覆い、且つその表面に前記アミン系化合物を吸着させるエッチング工程と、
前記エッチング工程を経た複数のアルミニウム板材を組み合わせ、筒状として射出形成用金型にインサートし、これら複数のアルミニウム板材の表面にポリブチレンテレフタレート、ポリフェニレンサルファイド、及びポリアミド樹脂から選択される1種以上を含む樹脂組成物を射出して、射出成形を行うと共に、当該樹脂組成物を介して前記複数のアルミニウム板材を接合させる射出接合工程と、
を含むことを特徴とするLED電球用放熱部の製造方法。 - 筒状に曲げ加工が施された1のアルミニウム板材を水溶性アミン系化合物水溶液に浸漬し、その表面を20~80nm周期の超微細凹凸、又は直径20~80nmの超微細凹部若しくは超微細凸部で覆い、且つその表面に前記アミン系化合物を吸着させるエッチング工程と、
前記エッチング工程を経たアルミニウム板材を射出形成用金型にインサートし、そのアルミニウム板材の表面にポリブチレンテレフタレート、ポリフェニレンサルファイド、及びポリアミド樹脂から選択される1種以上を含む樹脂組成物を射出して、射出成形を行うと共に、当該樹脂組成物を介して前記アルミニウム板材の両端部を相互に接合させる射出接合工程と、
を含むことを特徴とするLED電球用放熱部の製造方法。
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WO2014041470A3 (en) * | 2012-09-11 | 2014-05-22 | Koninklijke Philips N.V. | Heat sink structure and method of manufacturing the same |
CN111685716A (zh) * | 2020-07-24 | 2020-09-22 | 湖南省华芯医疗器械有限公司 | 一种内窥镜前端组件、内窥镜及生产模具 |
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WO2004041532A1 (ja) * | 2002-11-08 | 2004-05-21 | Taisei Plas Co., Ltd. | アルミニウム合金と樹脂の複合体とその製造方法 |
JP2009241952A (ja) * | 2008-03-31 | 2009-10-22 | Dainippon Printing Co Ltd | 容器及びその製造方法 |
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WO2014041470A3 (en) * | 2012-09-11 | 2014-05-22 | Koninklijke Philips N.V. | Heat sink structure and method of manufacturing the same |
CN111685716A (zh) * | 2020-07-24 | 2020-09-22 | 湖南省华芯医疗器械有限公司 | 一种内窥镜前端组件、内窥镜及生产模具 |
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