WO2010082331A1 - スプルーブッシュ及びスプルーブッシュの製造方法 - Google Patents
スプルーブッシュ及びスプルーブッシュの製造方法 Download PDFInfo
- Publication number
- WO2010082331A1 WO2010082331A1 PCT/JP2009/050460 JP2009050460W WO2010082331A1 WO 2010082331 A1 WO2010082331 A1 WO 2010082331A1 JP 2009050460 W JP2009050460 W JP 2009050460W WO 2010082331 A1 WO2010082331 A1 WO 2010082331A1
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- WIPO (PCT)
- Prior art keywords
- sprue
- flow hole
- sintered layer
- metal powder
- sprue bush
- Prior art date
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- 238000004519 manufacturing process Methods 0.000 title claims abstract description 60
- 229910052751 metal Inorganic materials 0.000 claims abstract description 99
- 239000002184 metal Substances 0.000 claims abstract description 99
- 239000000843 powder Substances 0.000 claims abstract description 72
- 238000001746 injection moulding Methods 0.000 claims abstract description 40
- 238000005520 cutting process Methods 0.000 claims abstract description 35
- 238000010438 heat treatment Methods 0.000 claims abstract description 6
- 239000000463 material Substances 0.000 claims description 73
- 239000012530 fluid Substances 0.000 claims description 65
- 239000002826 coolant Substances 0.000 claims description 8
- 230000015572 biosynthetic process Effects 0.000 claims description 6
- 239000000110 cooling liquid Substances 0.000 claims description 6
- 230000001678 irradiating effect Effects 0.000 claims description 5
- 238000010030 laminating Methods 0.000 abstract description 5
- 230000002708 enhancing effect Effects 0.000 abstract 1
- 239000000498 cooling water Substances 0.000 description 35
- 238000002347 injection Methods 0.000 description 30
- 239000007924 injection Substances 0.000 description 30
- 238000000034 method Methods 0.000 description 24
- 238000005245 sintering Methods 0.000 description 18
- 238000009751 slip forming Methods 0.000 description 7
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 7
- 238000001816 cooling Methods 0.000 description 6
- 238000007796 conventional method Methods 0.000 description 5
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 4
- CURLTUGMZLYLDI-UHFFFAOYSA-N Carbon dioxide Chemical compound O=C=O CURLTUGMZLYLDI-UHFFFAOYSA-N 0.000 description 2
- 239000000956 alloy Substances 0.000 description 2
- 229910045601 alloy Inorganic materials 0.000 description 2
- JNDMLEXHDPKVFC-UHFFFAOYSA-N aluminum;oxygen(2-);yttrium(3+) Chemical compound [O-2].[O-2].[O-2].[Al+3].[Y+3] JNDMLEXHDPKVFC-UHFFFAOYSA-N 0.000 description 2
- 239000012809 cooling fluid Substances 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 238000007599 discharging Methods 0.000 description 2
- 229910052742 iron Inorganic materials 0.000 description 2
- 230000003287 optical effect Effects 0.000 description 2
- 239000007787 solid Substances 0.000 description 2
- 229910019901 yttrium aluminum garnet Inorganic materials 0.000 description 2
- 238000009412 basement excavation Methods 0.000 description 1
- 239000011230 binding agent Substances 0.000 description 1
- 229910002092 carbon dioxide Inorganic materials 0.000 description 1
- 239000001569 carbon dioxide Substances 0.000 description 1
- 238000005266 casting Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000010304 firing Methods 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 238000002844 melting Methods 0.000 description 1
- 230000008018 melting Effects 0.000 description 1
- 239000007769 metal material Substances 0.000 description 1
- 239000002923 metal particle Substances 0.000 description 1
- 238000012856 packing Methods 0.000 description 1
- 238000007711 solidification Methods 0.000 description 1
- 230000008023 solidification Effects 0.000 description 1
- 238000003860 storage Methods 0.000 description 1
- 229920005992 thermoplastic resin Polymers 0.000 description 1
- 239000010409 thin film Substances 0.000 description 1
Images
Classifications
-
- 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
- B29C33/00—Moulds or cores; Details thereof or accessories therefor
- B29C33/0061—Moulds or cores; Details thereof or accessories therefor characterised by the configuration of the material feeding channel
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22F—WORKING METALLIC POWDER; MANUFACTURE OF ARTICLES FROM METALLIC POWDER; MAKING METALLIC POWDER; APPARATUS OR DEVICES SPECIALLY ADAPTED FOR METALLIC POWDER
- B22F10/00—Additive manufacturing of workpieces or articles from metallic powder
- B22F10/20—Direct sintering or melting
- B22F10/28—Powder bed fusion, e.g. selective laser melting [SLM] or electron beam melting [EBM]
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22F—WORKING METALLIC POWDER; MANUFACTURE OF ARTICLES FROM METALLIC POWDER; MAKING METALLIC POWDER; APPARATUS OR DEVICES SPECIALLY ADAPTED FOR METALLIC POWDER
- B22F10/00—Additive manufacturing of workpieces or articles from metallic powder
- B22F10/30—Process control
- B22F10/36—Process control of energy beam parameters
- B22F10/366—Scanning parameters, e.g. hatch distance or scanning strategy
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22F—WORKING METALLIC POWDER; MANUFACTURE OF ARTICLES FROM METALLIC POWDER; MAKING METALLIC POWDER; APPARATUS OR DEVICES SPECIALLY ADAPTED FOR METALLIC POWDER
- B22F10/00—Additive manufacturing of workpieces or articles from metallic powder
- B22F10/50—Treatment of workpieces or articles during build-up, e.g. treatments applied to fused layers during build-up
-
- 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
- B29C33/00—Moulds or cores; Details thereof or accessories therefor
- B29C33/02—Moulds or cores; Details thereof or accessories therefor with incorporated heating or cooling means
- B29C33/04—Moulds or cores; Details thereof or accessories therefor with incorporated heating or cooling means using liquids, gas or steam
-
- 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
- B29C33/00—Moulds or cores; Details thereof or accessories therefor
- B29C33/38—Moulds or cores; Details thereof or accessories therefor characterised by the material or the manufacturing process
- B29C33/3842—Manufacturing moulds, e.g. shaping the mould surface by machining
-
- 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
- B29C45/17—Component parts, details or accessories; Auxiliary operations
- B29C45/26—Moulds
- B29C45/27—Sprue channels ; Runner channels or runner nozzles
-
- 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
- B29C45/17—Component parts, details or accessories; Auxiliary operations
- B29C45/72—Heating or cooling
- B29C45/73—Heating or cooling of the mould
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P10/00—Technologies related to metal processing
- Y02P10/25—Process efficiency
Definitions
- the present invention relates to a sprue bush provided in an injection mold, and more particularly, a sprue bush capable of allowing cooling water to flow therein to accelerate solidification of a fluid material in the sprue bush, and the sprue bush. It relates to the manufacturing method.
- a mold used for injection molding includes a sprue bush in which an injection part of an injection molding machine that injects a fluid material is pressed and fluid material is injected from the injection part, and a cavity that is a space filled with the fluid material.
- a sprue through which a fluid material passes is formed in the sprue bush, and a runner serving as a flow path for the fluid material is formed between the sprue bush of the mold and the cavity.
- the molded product manufactured by injection molding is taken out from the mold after the fluid material in the sprue and runner is sufficiently cooled and solidified to prevent the material from remaining in the sprue and runner.
- the contact area of the fluid material per unit volume is larger in the cavity than in the sprue and runner, so that the fluid material in the sprue and runner is more difficult to cool than the fluid material in the cavity.
- the time required for the fluid material to solidify is longer in the sprue and runner than in the cavity, and the length of time required for the fluid material in the sprue and runner to solidify is the manufacturing time of the molded product. This greatly affects the length of time required. Therefore, in order to reduce the time required for manufacturing the molded product and improve the production efficiency of the molded product, it is necessary to reduce the time required until the fluid material in the sprue and the runner is solidified.
- Patent Document 1 discloses a sprue bush that is formed in a cylindrical shape as a whole and has a cooling water flow hole formed therein.
- the sprue bush disclosed in Patent Document 1 applies metal powder, irradiates the applied metal powder with laser light and sinters it to form a sprue bush, and performs application and sintering of the metal powder. It is manufactured by a method of forming a three-dimensional shape of the sprue bushing by repeatedly stacking one layer further.
- the sprue and cooling water flow holes in the sprue bushing form a cavity by not irradiating the laser light to the part corresponding to the sprue and cooling water flow holes when forming one layer of the sprue bushing, Formed by stacking cavities.
- the sprue bush disclosed in Patent Document 1 forms the entire cylindrical sprue bush by repeating the application and sintering of metal powder, the time and labor required for manufacturing are very large. There is a problem. Moreover, since the whole sprue bushing is formed by sintering metal powder, the part where the injection part of the injection molding machine contacts is also a sintered body. Since the injection part of the injection molding machine is pressed against the sprue bush at a certain pressure, and the sintered body is vulnerable to pressurization, the sprue bush disclosed in Patent Document 1 is damaged at the time of injection molding. There is a problem that it is easy to do.
- the sprue bush disclosed in Patent Document 1 forms sprue and cooling water flow holes by selectively sintering metal powder.
- the metal powder is sintered with laser light, heat propagates around the portion of the metal powder irradiated with the laser light, and sintering is performed in a range that is somewhat wider than the spot diameter of the laser light.
- the sprue and cooling water flow holes cannot be formed with a diameter smaller than a certain size determined by the heat propagation range. Specifically, it is difficult to form the sprue and cooling water flow holes with a diameter smaller than 4 mm.
- the present invention has been made in view of such circumstances.
- the object of the present invention is to reduce the time and labor required for manufacturing by forming a part of the sprue bushing into a metal lump.
- Another object of the present invention is to provide a sprue bushing with improved durability and a method for manufacturing the sprue bushing.
- the sprue bush according to the present invention includes a sprue for allowing a fluid material for injection molding to pass therethrough and a flow hole for allowing a coolant to cool the fluid material filled in the sprue to flow therethrough.
- a part of the sprue including one end is formed, an end part formed of a metal lump and another part of the sprue are formed, and the metal is fired in a direction along the sprue.
- a portion where the layered layers are laminated is formed integrally, and the flow hole is formed by cutting the sintered layer.
- the sprue bush according to the present invention is characterized in that the end portion is provided at an end where fluid material is injected from the injection molding machine into the sprue.
- the sprue bush according to the present invention is characterized in that the flow hole has a curved portion surrounding a part of the periphery of the sprue in a cross section intersecting a direction in which the coolant flows.
- the sprue bush according to the present invention is characterized in that the flow hole has a portion formed so as to surround the sprue in a cross section intersecting with the sprue and to follow the sprue.
- the sprue bush according to the present invention is characterized in that the flow hole has a branching portion.
- a flange portion in which an end portion including the end portion protrudes around the sprue is formed, and an inlet and an outlet for cooling liquid into the flow hole are provided in the flange. It is formed in the part.
- a sprue bushing manufacturing method includes a sprue for allowing a fluid material for injection molding to pass therethrough and a flow hole for allowing a coolant to cool the fluid material filled in the sprue to flow therethrough.
- a metal powder is applied to the end portion, and the applied metal powder is applied.
- the metal powder sinters to form a sintered layer of metal welded to the end, and the energy powder is applied to the formed sintered layer by applying the metal powder.
- a part of the sprue is formed by forming a through hole in the end portion, and the other part of the sprue is formed each time the sintered layer is stacked to a predetermined thickness. It forms by cutting the part corresponding to the said sprue.
- the shape of the through hole in the sintered layer is a curved shape surrounding a part of the periphery of the sprue. It is characterized by forming.
- the sprue bushing manufacturing method according to the present invention is such that when a sintered layer is formed, the energy powder applied to the metal powder is scanned in one scanning direction, and the scanning is repeated while shifting the scanning position. When the next sintered layer is formed on the one sintered layer, the direction of the energy beam is set to the direction intersecting with the scanning direction when the one sintered layer is formed. Scanning is performed.
- the end portion is formed of a metal lump, and the other portions excluding the end portion are made of metal powder using laser. Formed by laminating sintered layers heated and sintered with an energy beam such as light, and cutting the portion corresponding to the through holes every time a sintered layer of a predetermined thickness is laminated Form.
- the sprue bush can be manufactured in a shorter time as compared with the method of manufacturing the whole sprue bush by sintering metal powder.
- the through-hole can be formed in a smaller shape and a more free shape.
- the end formed by the metal lump is at the end on the side where the fluid material is injected from the injection molding machine to the sprue, so at the time of injection molding, the injection part of the injection molding machine is formed by the metal lump. Will be pressed against the edge.
- the cross-sectional shape of the flow hole can be formed into a curved shape surrounding a part of the periphery of the sprue, and between the fluid material in the sprue and the coolant in the flow hole. Heat exchange can be performed over a large area, and the fluid material in the sprue can be efficiently cooled.
- the cross-sectional shape of the flow hole can be formed in an annular shape surrounding the periphery of the sprue, and heat exchange between the fluid material in the sprue and the coolant in the flow hole can be performed over a wide area.
- the fluid material in the sprue can be efficiently cooled.
- the shape of the flow hole can be formed into a shape including a branching portion where the cooling liquid branches, and heat between the fluid material in the sprue and the cooling liquid in the flow hole. Exchanges can be made at multiple locations to efficiently cool the fluid material in the sprue.
- the sprue bush is formed with a flange portion including an end portion, and an inflow port and an outflow port of the flow hole are formed in the flange portion.
- the sprue in the sprue bushing is also formed by cutting the sintered layer.
- the sprue can be formed with a smaller diameter, and the wall between the sprue and the flow hole can be formed thinner.
- the energy beam is scanned in a planar shape, and the laser beam scanning direction is made to intersect with each other between the overlapping sintered layers.
- the directions which are easily broken in the sintered layer intersect with each other between the sintered layers.
- the sprue bush can be manufactured in a shorter time than in the prior art, it is possible to reduce the time and labor required for manufacturing the sprue bush.
- the through holes can be formed in a smaller shape than in the prior art, the sprue bush can be further downsized.
- the flow hole having a more free shape than the conventional one can be formed in the sprue bush, it is possible to form a flow hole having a shape for cooling the fluid material in the sprue more efficiently. Become.
- the end portion formed of the metal lump has higher durability against pressurization than the other portion formed of the sintered body, so even if the injection portion of the injection molding machine is pressed.
- the end portion is not easily damaged, and the durability of the sprue bushing is improved.
- the fluid material in the sprue can be efficiently cooled, the time required for the fluid material in the sprue to solidify is shortened, and the time required for manufacturing an injection molded product. And the production efficiency of the molded product can be improved.
- the inlet and outlet of the flow hole formed in the flange portion are pressed against the mold, so that the cooling is performed from the inlet or outlet. It becomes difficult for the liquid to leak out and injection molding can be performed without any trouble.
- the sprue bush can be further reduced in size. Furthermore, since the wall between the sprue and the flow hole can be formed thinner than in the prior art, the fluid material in the sprue can be cooled more efficiently.
- the directions in which the individual sintered layers constituting the sprue bushing are easily broken intersect each other between the sintered layers that overlap each other. Even if it becomes, it becomes difficult to break, and this invention has the outstanding effect, such as the durability of a sprue bush improving.
- FIG. 4 is a cross-sectional view of the sprue bush cut along IV-IV in FIG. 3.
- FIG. 5 is a cross-sectional view of the sprue bush cut along VV in FIG. 3.
- FIG. 3 is typical sectional drawing which shows the usage pattern of the sprue bush at the time of injection molding.
- It is a typical fragmentary sectional view which shows the structure of the manufacturing apparatus which manufactures a sprue bush.
- FIG. 1 is a perspective view showing an appearance of a sprue bush 1 of the present invention.
- the sprue bush 1 is a disc having an outer diameter larger than the outer diameter of the cylindrical portion 12 at one end of a cylindrical portion 12 formed in a cylindrical shape with a sprue for passing a fluid material for injection molding as an inner hole.
- the flange part 11 formed in the shape is connected.
- the sprue penetrates the flange portion 11 and the cylindrical portion 12, and the sprue bush 1 is formed in a cylindrical shape having the flange portion 11 formed at one end as a whole.
- the flange portion 11 side of the sprue bush 1 is a side into which a fluid material is injected from an injection molding machine, and the distal end side of the cylindrical portion 12 is a side from which the fluid material is discharged into the mold for injection molding.
- a discharge port 21 for discharging the fluid material from the sprue is formed in the cylindrical end surface 13 which is an end surface at the tip of the cylindrical portion 12.
- the surface located on the cylindrical portion 12 side is a contact surface 14 that comes into contact with the mold when the sprue bush 1 is attached to the mold.
- the sprue bush 1 is formed with a through hole for allowing cooling water, which is a cooling liquid for cooling the fluid material in the sprue, to be embedded therein, so that the cooling water can flow into the through hole.
- An inflow port 31 and an outflow port 32 for allowing cooling water to flow out from the through holes are formed on the contact surface 14 of the flange portion 11.
- FIG. 2 is a schematic perspective view showing the internal configuration of the sprue bush 1.
- the outer shape of the sprue bush 1 is indicated by a two-dot chain line
- the sprue 2 formed in the sprue bush 1 is indicated by a broken line
- the flow hole 3 formed in the sprue bush 1 is indicated by a solid line.
- the sprue 2 is formed through the cylindrical portion 12 and the flange portion 11 at a position including the rotational symmetry axis of the cylindrical portion 12 and the flange portion 11.
- An end opposite to the discharge port 21 of the sprue 2 is an injection port 22 into which a fluid material is injected from an injection molding machine.
- the injection port 22 is formed in a shape whose diameter is wider than the other part of the sprue 2 in accordance with the shape of the injection part so that the injection part of the injection molding machine can be pressed.
- the sprue 2 is formed in a shape in which the diameter gradually increases from the fluid material injection side to the discharge side except for the injection port 22. This is for facilitating taking out the material solidified in the sprue 2 from the discharge side. In order to simplify the drawing, the form in which the diameter of the sprue 2 gradually increases is not necessarily reflected on the drawing.
- the through-hole 3 is a cavity formed inside the sprue bush 1 by being connected from the inlet 31 to the outlet 32 so that the cooling water can flow from the inlet 31 to the outlet 32.
- the flow hole 3 connected to the inflow port 31 is formed in the flange portion 11 toward the sprue 2, and is branched into two at a branch portion 33 formed closer to the sprue 2 than the outer periphery of the cylindrical portion 12. ing.
- Each branched flow hole 3 is formed along the periphery of the sprue 2 toward the cylindrical end surface 13 substantially parallel to the rotational symmetry axis.
- the two flow holes 3 make a U-turn in the vicinity of the cylindrical end surface 13 and are formed along the periphery of the sprue 2 in a direction opposite to the cylindrical end surface 13 substantially parallel to the rotational symmetry axis.
- the two flow holes 3 join at a joining part 34 formed in the flange part 11.
- the flow hole 3 is formed from the merging portion 34 toward the outer periphery of the flange portion 11, and is connected to the outlet 32.
- the flow holes 3 formed in the cylindrical portion 12 are disposed in a band shape around the sprue 2 as a whole.
- FIG. 3 is a cross-sectional view showing the internal structure of the sprue bush 1.
- the cross section shown in FIG. 3 is a cross section that includes the rotational symmetry axis of the sprue bush 1 and cuts the inflow port 31 and the outflow port 32.
- the flange end surface 15 is an end surface opposite to the cylindrical end surface 13 in the sprue bush 1, has an injection port 22, and is a surface against which an injection part of an injection molding machine is pressed.
- the flange end surface 15 corresponds to one end in the present invention, and the cylindrical end surface 13 corresponds to the other end in the present invention.
- the through holes 3 not included in the cross section are indicated by broken lines, and the direction in which the cooling water flows is indicated by black arrows.
- the cooling water flows from the inlet 31 into the flow hole 3, flows through the flow hole 3, branches at the branch portion 33, and then flows around the sprue 2 toward the cylindrical end surface 13.
- a U-turn is made along the shape of 3 flows around the sprue 2 toward the flange end surface 15, merges at the merge portion 34, and flows out of the flow hole 3 from the outlet 32.
- the flow direction of the fluid material for injection molding is indicated by white arrows.
- the fluid material is injected into the sprue 2 from the inlet 22, passes through the sprue 2, and is discharged from the outlet 21.
- the end 16 including the flange end face 15 constitutes a part of the flange 11, and a part of the flow hole 3, a part of the sprue 2, and an inlet 22 are formed.
- the end portion 16 is formed from a metal lump, and the portion other than the end portion 16 of the flange portion 11 and the cylindrical portion 12 are formed by laminating a large number of sintered layers obtained by sintering metal powder.
- the metal material is, for example, an alloy containing iron as a main component.
- the portion formed by laminating the sintered layers is joined to the end portion 16 formed of a metal lump, and the sprue bush 1 is integrally formed as a whole.
- FIG. 4 is a cross-sectional view of the sprue bush 1 cut along IV-IV in FIG.
- the cross section shown in FIG. 4 is a cross section that intersects the direction in which the fluid material passes through the sprue 2.
- the fluid material in 2 can be cooled from a plurality of directions. As shown in FIG.
- the cross-sectional shape of the flow hole 3 is a curved wide shape surrounding a part of the periphery of the sprue 2, and a curved portion having such a shape is formed along the sprue 2.
- the area for performing heat exchange between the fluid material in the sprue 2 and the cooling water flowing through the flow hole 3 is widened.
- heat exchange is performed in a much wider area than when the cross-sectional shape of the flow hole 3 is circular. Therefore, in the sprue bush 1 of the present invention, the fluid material in the sprue 2 can be efficiently cooled.
- FIG. 5 is a cross-sectional view of the sprue bush 1 cut along VV in FIG.
- the flow hole 3 shown in FIG. 5 is a part that connects the flow hole 3 through which the cooling water flows forward and the flow hole 3 through which the cooling water flows backward, with respect to the cross section.
- the shape is also a curved wide shape surrounding a part of the periphery of the sprue 2.
- FIG. 6 is a schematic cross-sectional view showing how the sprue bushing 1 is used during injection molding.
- the sprue bush 1 is assembled to a mold including an upper mold 42, a middle mold 43 and a lower mold 44 with the cylindrical end surface 13 facing down.
- the cylindrical end surface 13 is pressed against the lower mold 44, the contact surface 14 is pressed against the upper mold 42, and the injection part 41 of the injection molding machine is pressed against the flange end surface 15 for assembly. .
- a cavity 46 and a runner 45 connected to the cavity 46 are formed between the middle mold 43 and the lower mold 44.
- the discharge port 21 formed in the cylindrical end surface 13 is connected to the runner 45.
- the fluid material injected into the sprue 2 from the injection part 41 of the injection molding machine passes through the sprue 2, is discharged from the discharge port 21 to the runner 45, and is filled into the cavity 46 via the runner 45.
- the fluid material filled in the cavity 46 is cooled and solidified, and then taken out as a molded product. When the molded product is taken out, the material solidified in the runner 45 and the sprue 2 is also taken out.
- the reason why the sprue 2 is formed in a shape in which the diameter gradually increases from the fluid material injection side to the discharge side is that the solidified material is taken out from the discharge side as shown in FIG. This is because it is easy to take out so that no material remains.
- the upper mold 42 includes a water supply path 421 for supplying cooling water to the through hole 3 of the sprue bush 1 and a drain path 422 for discharging cooling water from the through hole 3.
- a water supply path 421 for supplying cooling water to the through hole 3 of the sprue bush 1
- a drain path 422 for discharging cooling water from the through hole 3.
- the cooling water flows into the through hole 3 from the water supply path 421 through the inlet 31, flows through the through hole 3 formed in the sprue bush 1, and flows out from the outlet 32 to the drain path 422.
- the cooling water flowing through the flow holes 3 cools the fluid material in the sprue 2.
- the inflow port 31 and the outflow port 32 are formed on the contact surface 14 of the flange portion 11, and the contact surface 14 is pressed against the upper mold 42 during assembly, so that the contact surface 14 and the upper mold 42 are in close contact with each other, Cooling water is unlikely to leak.
- the injection part 41 of the injection molding machine is pressed against the end part 16 formed of a metal lump. Since the end portion 16 formed of a metal lump has higher durability against pressure than the portion formed of a sintered body, the end portion 16 is not easily damaged even when the injection portion 41 of the injection molding machine is pressed. . Therefore, the durability of the sprue bush 1 is improved as compared with the conventional technique in which the injection part 41 of the injection molding machine is pressed against the sintered body.
- FIG. 7 is a schematic partial cross-sectional view showing the configuration of the manufacturing apparatus 5 that manufactures the sprue bushing 1.
- the manufacturing apparatus 5 is an apparatus that forms a solid shape by heating and sintering a metal powder with a laser beam (energy beam), and performs a metal stereolithography combined process of cutting during the formation of the solid shape.
- the manufacturing apparatus 5 includes a work stage 54 that can move up and down while holding a work, a powder stage 56 that can move up and down to hold the metal powder 60, and a metal on the work stage 54 from the metal powder 60 held by the powder stage 56. And a blade 55 for applying the powder 61.
- the manufacturing apparatus 5 includes a laser light source 52 for irradiating the metal powder 61 on the work stage 54 with laser light, and a cutting machine 53 for cutting the work.
- the laser light source 52 uses a laser that can effectively heat an irradiation target, such as a YAG (yttrium aluminum garnet) laser or a carbon dioxide laser.
- the cutting machine 53 has a cutting tool for performing a cutting process such as a drill.
- the cutting tool that the cutting machine 53 has is a small-sized cutting tool that can cut a hole having a size smaller than 4 mm, such as a 1 mm diameter drill.
- the manufacturing apparatus 5 includes a control unit 51 that controls the operation of the entire manufacturing apparatus 5.
- the control unit 51 includes a calculation unit that performs a calculation for controlling the operation, a memory that stores information associated with the calculation, a storage unit that stores a control program, and the like.
- the control part 51 controls the operation timing of each part which comprises the manufacturing apparatus 5, and the irradiation position of the laser beam irradiated to the metal powder 61 from the laser light source 52, and the cutting position of the workpiece
- the manufacturing apparatus 5 may be configured to change the irradiation position of the laser light by changing the position of the laser light source 52, and the laser light is operated by operating an optical system (not shown) that changes the optical path of the laser light. The irradiation position may be changed.
- the end 16 is formed from a metal lump.
- the material of the metal block is an alloy mainly composed of iron.
- FIG. 8 is a front view showing an end portion 16 formed from a metal lump
- FIG. 9 is a cross-sectional view showing the end portion 16 formed from a metal lump.
- the end portion 16 is formed in a disk shape having two substantially parallel surfaces, and one surface is a surface corresponding to the flange end surface 15.
- FIG. 8 shows a front view with the surface opposite to the flange end surface 15 as the front
- FIG. 9 shows a cross section with the flange end surface 15 on the lower side.
- a metal plate is formed into a disk shape having the same diameter as the flange portion 11 by cutting the metal plate, and a part of the sprue 2 is formed by forming a through-hole at the center of the disk.
- the end portion 16 is formed from a metal lump by forming the inlet 22 and forming a part of the flow hole 3 on the surface opposite to the flange end surface 15. Note that the end portion 16 may be formed from a metal lump by other methods such as casting.
- FIG. 10 is a flowchart showing a procedure for manufacturing the sprue bushing 1 with the manufacturing apparatus 5.
- the manufacturer who manufactures the sprue bush 1 places the end portion 16 formed of a metal block on the work stage 54 with the flange end surface 15 facing down.
- the blade 55 is placed on the end portion 16 placed on the work stage 54.
- Metal powder 61 is applied (S1).
- FIG. 11 is a schematic cross-sectional view showing a state in which the metal powder 61 is applied to the end portion 16.
- the metal powder 61 is applied to the surface of the end portion 16 opposite to the flange end surface 15.
- the blade 55 applies the metal powder 61 to a predetermined thickness such as 0.05 mm.
- FIG. 12 is a schematic cross-sectional view showing the sintered layer 62 formed on the end portion 16.
- the laser light source 52 irradiates the laser light in a shape corresponding to the outer shape of the sprue bush 1 while changing the irradiation position of the laser light, and lasers the region surrounded by the portion irradiated with the laser light into a planar shape. Scan with light.
- the spot diameter of the laser beam is about 0.5 mm, and the metal powder 61 irradiated with the laser beam is heated to about 1500 ° C.
- the metal powder 61 is sintered by heating, and is welded to the end portion 16 during sintering. As a result, a sintered layer 62 welded to the end portion 16 formed of a metal lump is formed.
- the sintered layer 62 has a circular thin film shape in which the outer diameter of the end portion 16 is extended upward, and the thickness is a value such as about 0.05 mm corresponding to the thickness to which the metal powder 61 is applied.
- FIG. 13 is a schematic cross-sectional view showing a state in which the metal powder 61 is applied to the sintered layer 62.
- the blade 55 applies the metal powder 61 to a predetermined thickness similar to that in step S1.
- the metal powder 61 applied to the sintered layer 62 is irradiated with laser light from the laser light source 52, whereby the metal powder 61 is heated and sintered to sinter the sintered layer.
- a new sintered layer stacked on 62 is formed (S4).
- step S5 the control unit 51 of the manufacturing apparatus 5 determines whether or not a predetermined number of predetermined sintered layers have been continuously formed.
- step S5 the control unit 51 determines whether, for example, 10 sintered layers have been continuously formed. Since one layer of sintered layer 62 is formed with a predetermined thickness, it is determined in step S5 whether a predetermined number of sintered layers have been continuously formed. It can be determined whether or not a predetermined thickness has been reached.
- the manufacturing apparatus 5 returns the process to step S3.
- the manufacturing apparatus 5 repeats the processes in steps S3 to S4 until it can be determined in step S5 that a predetermined number of sintered layers have been continuously formed, so that the metal powder 61 is superimposed on the sintered layer 62 sintered.
- the process for forming the binder layer 62 is repeated.
- step S5 the number of the continuously formed sintered layers 62 is not counted, but the thickness of the laminated sintered layers 62 is measured, and whether or not the sintered layers 62 are laminated to a predetermined thickness. You may use the method of determining.
- FIG. 14 is a view of the locus of the spot irradiated with the laser light from the metal powder 61 when the sintered layer 62 is formed, and the scanning direction of the laser light is indicated by an arrow.
- the manufacturing apparatus 5 scans the laser beam in a circle that matches the outer diameter of the sprue bush 1 and repeatedly scans the laser beam in one scanning direction while shifting the scanning position within the area surrounded by the scanned circle. A circular region is scanned in a planar shape with a laser beam.
- FIG. 14 is a view of the locus of the spot irradiated with the laser light from the metal powder 61 when the sintered layer 62 is formed, and the scanning direction of the laser light is indicated by an arrow.
- the manufacturing apparatus 5 scans the laser beam in a circle that matches the outer diameter of the sprue bush 1 and repeatedly scans the laser beam in one scanning direction while shifting the scanning position within the area surrounded by the scanned circle. A circular region is scanned in a planar shape with a laser
- FIG. 15 is a view of the locus of the spot irradiated with the laser light from the metal powder 61 when the next sintered layer 62 is formed on the sintered layer 62 formed by the scanning method shown in FIG. is there.
- the direction intersecting with the scanning direction when forming the base sintered layer 62 is set as the laser light scanning direction.
- the direction in which the metal particles are weakly bonded in the sintered layer 62 and are easily cracked intersects with each other between the sintered layers 62, and the sprue bushing 1 is damaged no matter which direction the impact is applied. It becomes difficult to do.
- FIG. 16 is a schematic cross-sectional view showing a state in which a predetermined number of sintered layers 62 are formed on the end portion 16.
- a sintered body 63 in which a plurality of sintered layers 62 are stacked is formed on the end portion 16, and the sintered body 63 is cut by the cutting machine 53.
- the sintered layer 62 Since the sintered layer 62 is very thin, it is difficult to perform cutting with high accuracy each time each sintered layer 62 is formed, and it takes a lot of work. In the present invention, the sintered layers 62 are stacked to some extent.
- the sintered body 63 having a thickness of is cut. When the thickness of the sintered layer 62 is about 0.05 mm and the predetermined number is 10 layers, the thickness of the sintered body 63 cut by the cutting machine 53 is 0.5 mm.
- FIG. 17 is a schematic cross-sectional view showing a state where the sintered body 63 is cut.
- the cutting machine 53 excavates a portion corresponding to the sprue 2 and the through-hole 3 in the same shape as the sprue 2 and the through-hole 3 shown in FIG.
- the position where the cutting machine 53 cuts the sintered body 63 is controlled by the control unit 51.
- step S6 the part of the sprue 2 and the through-hole 3 included in the sintered body 63 in which the predetermined number of sintered layers 62 are stacked is formed.
- step 6 the control unit 51 forms the sintered layer 62 up to the portion corresponding to the cylindrical end surface 13 based on the total number of the formed sintered layers 62 or the height of the workpiece, and the sprue bush 1. Whether or not is completed is determined (S7).
- the control unit 51 determines that the sprue bushing 1 is not yet completed (S7: NO)
- the manufacturing apparatus 5 returns the process to step S3, and performs the processes of steps S3 to S7 until the sprue bushing 1 is completed. repeat. By repeating the processes of steps S3 to S7, the formation of the sintered layer 62 and the cutting of the portions corresponding to the sprue 2 and the flow holes 3 are repeated.
- FIG. 18 is a schematic cross-sectional view showing a cross section of the sprue bush 1 completed halfway through the flange portion 11
- FIG. 19 is a plan view showing the top surface of the sprue bush 1 completed halfway through the flange portion 11.
- a portion corresponding to the sprue 2 is cut at a position including the rotationally symmetric axis by the cutting machine 53. Further, the cutting machine 53 cuts a portion corresponding to a portion formed around the sprue 2 and a portion communicating with the inflow port 31 and the outflow port 32 in the flow hole 3.
- FIG. 20 is a schematic cross-sectional view showing a cross section of the sprue bushing 1 completed to the middle of the cylindrical portion 12.
- the upper surface of the sprue bush 1 completed to the middle of the cylindrical portion 12 is formed in the same shape as the cross section shown in FIG. That is, the outer shape is formed in a shape matching the outer shape of the cylindrical portion 12, and the portion corresponding to the sprue 2 is cut by the cutting machine 53 at a position including the rotationally symmetric axis, and the portion corresponding to the four flow holes 3. Is excavated in a curved shape surrounding a part of the periphery of the sprue 2.
- FIG. 21 is a schematic cross-sectional view showing a cross section of the sprue bush 1 completed up to the vicinity of the cylindrical end face 13.
- the upper surface of the sprue bush 1 completed to the vicinity of the cylindrical end surface 13 is formed in the same shape as the cross section shown in FIG. That is, the portion corresponding to the sprue 3 is cut by the cutting machine 53 at a position including the rotationally symmetric axis, and the portion corresponding to the portion where the flow hole 3 makes a U-turn is excavated.
- FIG. 22 is a schematic cross-sectional view showing a cross section of the completed sprue bushing 1.
- the sintered layer 62 is stacked up to the cylindrical end face 13, and the discharge port 21 of the sprue 2 is formed by excavation.
- the sprue bush 1 is completed by removing the sprue bush 1 from the work stage 54 and removing the metal powder 61 clogged in the sprue 2 and the flow hole 3.
- the sprue bush 1 is composed of the end portion 16 formed of a metal lump and a portion where a large number of metal sintered layers 62 are laminated, and in the course of laminating the sintered layers 62. Each time the sintered layer 62 is laminated to a predetermined thickness, the sprue 2 and the through-hole 3 are formed by excavating portions corresponding to the sprue 2 and the through-hole 3.
- the sprue bush 1 is manufactured by stacking the sintered layer 62 with the end portion 16 formed of a metal lump as a base, compared to the prior art in which the entire sprue bush is formed from metal powder in the absence of a base, The sprue bushing 1 can be easily manufactured, and the labor and time required for manufacturing the sprue bushing 1 can be reduced. Further, since the number of forming the sintered layers 62 is reduced by the amount of the end portion 16 formed of a metal lump, the time required for manufacturing the sprue bush 1 can be further shortened.
- the sprue 2 and the through-hole 3 are formed by excavating the sintered layer, compared with the conventional method of forming the sprue and the through-hole by selective sintering of metal powder.
- the sprue 2 and the through holes 3 can be formed in a smaller shape.
- the sprue and the through-hole 3 can be formed with a smaller diameter compared to the conventional method in which the diameter of the sprue and the through-hole formed cannot be reduced any more, such as 4 mm. Is possible. For this reason, the sprue bush 1 can be further downsized.
- the distance between the sprue 2 and the flow hole 3 can be made smaller as compared with the prior art in which there is a limit that cannot be further reduced, such as 4 mm. Therefore, the fluid material in the sprue 2 can be more efficiently cooled by the cooling water flowing through the flow holes 3.
- the sprue 2 and the through-hole 3 can be formed in a more free shape as compared with the conventional method of forming the sprue and the through-hole by selective sintering of the metal powder.
- the flow hole 3 is formed in a band shape that is curved so as to surround a part of the periphery of the sprue 2, and thus has a shape that is thin and close to the sprue 2.
- the through holes 3 are difficult to form by a method other than the present invention that can directly form the cross-sectional shape of the through holes 3 by cutting.
- the shape of the flow hole 3 is formed into a shape including the branching portion 33 where the cooling water branches. Since the branch portion 33 is formed in the flow hole 3, a plurality of cooling water flow paths exist in the flow hole 3, and the fluid material in the sprue 2 and the cooling in the flow hole 3 are cooled. Heat exchange with water is performed at a plurality of positions, and the fluid material in the sprue 2 can be efficiently cooled. As described above, in the sprue bush 1 of the present invention, the fluid material in the sprue 2 can be efficiently cooled.
- the sprue 2 It is possible to shorten the time required for the fluid material to solidify, shorten the time required for manufacturing an injection molded product, and improve the production efficiency of the molded product.
- FIG. 23 is a schematic perspective view showing an internal configuration of the sprue bushing 1 having the through holes 3 formed in other shapes.
- the through holes 3 formed in the sprue bush 1 are indicated by solid lines.
- the through-hole 3 formed in the cylindrical portion 12 is formed along the sprue 2 at a portion surrounding the sprue 2 in an annular shape in a cross section intersecting the sprue 2.
- the width of the ring of the flow hole 3 and the thickness of the wall between the flow hole 3 and the sprue 2 can be made smaller than the limit in the prior art.
- heat exchange is performed around the entire periphery of the sprue 2, so that the fluid material in the sprue 2 can be cooled more efficiently.
- the shape of the flow hole 3 is a spiral shape around the sprue 2, a shape branched into three or more in the sprue bush 1, or a plurality of inlets 31 and outlets 32. It is also possible to form in other shapes, such as a shape having. Even in the sprue bush 1 in which the flow holes 3 are formed in these shapes, the fluid material in the sprue 2 can be cooled more efficiently than in the conventional technique.
- the tip of the cylindrical portion 12 is tapered.
- the shape of the sprue bush 1 of the present invention is the outer diameter of the cylindrical portion 12. The shape may not change up to the tip.
- the outer shape of the sprue bushing 1 is circular.
- the outer shape of the sprue bushing 1 of the present invention may be other shapes that match the shape of the mold, such as a polygon. .
- the sprue bushing 1 has the flange portion 11.
- the sprue bushing 1 of the present invention is formed in a cylindrical shape having no flange, and has the inlet 31 and the side surface or one end surface.
- the form in which the outflow port 32 was formed may be sufficient.
- the form which sinters metal powder using a laser beam was shown, However, You may use energy beams other than a laser beam in this invention.
- the form which uses cooling water as a cooling fluid was shown, in this invention, it is also possible to use cooling fluids other than water.
- the present invention it is possible to efficiently cool the fluid material in the sprue during injection molding, and a durable sprue bushing is realized.
- the sprue bushing manufacturing method can be realized in which the time and labor required for manufacturing the sprue bushing are reduced.
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Abstract
Description
11 フランジ部
12 円筒部
13 円筒端面(他端)
15 フランジ端面
16 端部
2 スプルー
3 通流孔
31 流入口
32 流出口
33 分岐部
34 合流部
41 射出成形機の射出部
5 製造装置
60、61 金属粉末
62 焼結層
(スプルーブッシュの構造)
図1は、本発明のスプルーブッシュ1の外観を示す斜視図である。スプルーブッシュ1は、射出成形用の流体材料を通過させるためのスプルーを内孔とした円筒状に形成された円筒部12の一端に、円筒部12の外径よりも大きい外径を有する円板状に形成されたフランジ部11が連結してなる。スプルーはフランジ部11及び円筒部12を貫通しており、スプルーブッシュ1は、全体として一端にフランジ部11が形成された筒状に形成されている。スプルーブッシュ1のフランジ部11側は、射出成形機から流体材料が注入される側であり、円筒部12の先端側は、射出成形用の金型の内部へ流体材料を排出する側である。円筒部12の先端の端面である円筒端面13には、スプルーから流体材料を排出する排出口21が形成されている。また円板状のフランジ部11の両面の内、円筒部12の側に位置する面は、スプルーブッシュ1が金型に取り付けられる場合に金型に接触する接触面14である。スプルーブッシュ1の内部には、スプルー内の流体材料を冷却する冷却液である冷却水を通流させるための通流孔が埋設して形成されており、通流孔に冷却水を流入させるための流入口31と通流孔から冷却水を流出させるための流出口32とがフランジ部11の接触面14に形成されている。
次に、スプルーブッシュ1の使用形態を説明する。図6は、射出成形時のスプルーブッシュ1の使用形態を示す模式的断面図である。スプルーブッシュ1は、円筒端面13を下側にして、上金型42、中金型43及び下金型44からなる金型に組みつけられる。組みつけの際には、円筒端面13が下金型44に押し付けられ、接触面14が上金型42に押し付けられ、更に射出成形機の射出部41がフランジ端面15に押し付けられて組みつけられる。射出成形機の射出部41がフランジ端面15に押し付けられた状態では、フランジ端面15に形成されている注入口22に射出部41の射出口が連結し、射出部41から注入口22を介してスプルー2に流体材料が注入される。
次に、本発明のスプルーブッシュ1の製造方法を説明する。図7は、スプルーブッシュ1を製造する製造装置5の構成を示す模式的部分断面図である。製造装置5は、金属粉末をレーザー光(エネルギービーム)で加熱して焼結させることにより立体形状を形成し、また立体形状の形成途中に切削加工を加える金属光造形複合加工を行う装置である。製造装置5は、ワークを保持しながら昇降が可能なワークステージ54と、金属粉末60を保持する昇降可能な粉末ステージ56と、粉末ステージ56に保持された金属粉末60からワークステージ54上に金属粉末61を塗布するブレード55とを備える。ワークステージ54と粉末ステージ56とは、壁57を挟んで配置されている。また製造装置5は、ワークステージ54上の金属粉末61へレーザー光を照射するためのレーザー光源52と、ワークに対して切削加工を行う切削機53とを備えている。レーザー光源52は、YAG(イットリウムアルミニウムガーネット)レーザー又は炭酸ガスレーザー等の照射対象を効果的に加熱することができるレーザーを使用している。切削機53は、ドリル等の切削加工を行うための切削具を有している。切削機53が有している切削具は、1mm径のドリル等、4mmよりも小さいサイズの孔を切削することができる小サイズの切削具である。
Claims (10)
- 射出成形用の流体材料を通過させるためのスプルーと、該スプルー内に充填された流体材料を冷却する冷却液を通流させるための通流孔とを形成してあるスプルーブッシュにおいて、
一端を含む前記スプルーの一部分を形成してあり、金属塊で形成された端部と、前記スプルーの他の部分を形成してあり、前記スプルーに沿った方向に金属の焼結層を積層した部分とが一体に成形されてあり、
前記通流孔は、前記焼結層を切削することにより形成してあること
を特徴とするスプルーブッシュ。 - 前記端部は、射出成形機から前記スプルーへ流体材料が注入される側の端に設けてあることを特徴とする請求項1に記載のスプルーブッシュ。
- 前記通流孔は、冷却液が通流する方向に交差する断面内で前記スプルーの周囲の一部を囲む湾曲部分を有すること
を特徴とする請求項1又は2に記載のスプルーブッシュ。 - 前記通流孔は、前記スプルーに交差する断面内で前記スプルーを環状に囲み、前記スプルーに沿うように形成した部分を有すること
を特徴とする請求項1又は2に記載のスプルーブッシュ。 - 前記通流孔は分岐部を有することを特徴とする請求項1乃至4のいずれか一つに記載のスプルーブッシュ。
- 前記端部を含む端の部分が前記スプルーの周囲に張り出したフランジ部を形成してあり、
前記通流孔内への冷却液の注入口及び排出口を前記フランジ部に形成してあることを特徴とする請求項1乃至5のいずれか一つに記載のスプルーブッシュ。 - 射出成形用の流体材料を通過させるためのスプルーと、該スプルー内に充填された流体材料を冷却する冷却液を通流させるための通流孔とを形成してあるスプルーブッシュの製造方法において、
前記スプルーブッシュの一端に対応する部分を含む形状に金属塊を形成した端部を作成し、
前記端部に金属粉末を塗布し、塗布した金属粉末にエネルギービームを照射して金属粉末を加熱することにより、金属粉末が焼結して前記端部に溶着した金属の焼結層を形成し、
形成した焼結層に金属粉末を塗布してエネルギービームで加熱することにより、焼結層に積み重ねて焼結層を形成することを繰り返し、
積層した焼結層が所定の厚みになる都度、前記通流孔に対応する部分を切削することにより、前記通流孔を形成し、
前記スプルーブッシュの他端に対応する部分まで焼結層の形成及び前記通流孔の形成を繰り返すことにより前記スプルーブッシュを製造すること
を特徴とするスプルーブッシュの製造方法。 - 前記スプルーの一部分は、前記端部に貫通孔を形成することにより形成し、
前記スプルーの他の部分は、焼結層が所定の厚みに積み重なる都度、前記スプルーに対応する部分を切削することにより、形成すること
を特徴とする請求項7に記載のスプルーブッシュの製造方法。 - 切削により前記通流孔を形成する際に、焼結層内での前記通流孔の形状を、前記スプルーの周囲の一部を囲む湾曲した形状に形成すること
を特徴とする請求項7又は8に記載のスプルーブッシュの製造方法。 - 焼結層を形成する際には、金属粉末に照射するエネルギービームの走査を一の走査方向に行い、走査位置をずらしながら走査を繰り返すことによって金属粉末を焼結させ、
一の焼結層に重ねて次の焼結層を形成する際には、前記一の焼結層を形成する際の走査方向とは交差する方向を走査方向としてエネルギービームの走査を行うこと
を特徴とする請求項7乃至9のいずれか一つに記載のスプルーブッシュの製造方法。
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JP2012020485A (ja) * | 2010-07-15 | 2012-02-02 | Ngk Insulators Ltd | スプルーブッシュとその製造方法 |
JP2017030224A (ja) * | 2015-07-31 | 2017-02-09 | パナソニックIpマネジメント株式会社 | 三次元形状造形物の製造方法および三次元形状造形物 |
EP3205425A1 (en) * | 2016-02-11 | 2017-08-16 | General Electric Company | Methods and leading edge supports for additive manufacturing |
KR20180086467A (ko) | 2015-12-25 | 2018-07-31 | 파나소닉 아이피 매니지먼트 가부시키가이샤 | 금형 및 금형의 제조 방법 |
US11117329B2 (en) | 2018-06-26 | 2021-09-14 | General Electric Company | Additively manufactured build assemblies having reduced distortion and residual stress |
US11220032B2 (en) | 2016-06-29 | 2022-01-11 | Panasonic Intellectual Property Management Co., Ltd. | Sprue-bush and method for manufacturing sprue-bush |
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JP7421663B2 (ja) | 2020-06-17 | 2024-01-24 | デーエムゲー モリ ウルトラソニック レーザーテック ゲーエムベーハー | 冷却管システムを有する部品を製造するための方法 |
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KR20180086467A (ko) | 2015-12-25 | 2018-07-31 | 파나소닉 아이피 매니지먼트 가부시키가이샤 | 금형 및 금형의 제조 방법 |
US11173641B2 (en) | 2015-12-25 | 2021-11-16 | Panasonic Intellectual Property Management Co., Ltd. | Mold and method for manufacturing mold |
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US10357828B2 (en) | 2016-02-11 | 2019-07-23 | General Electric Company | Methods and leading edge supports for additive manufacturing |
US11220032B2 (en) | 2016-06-29 | 2022-01-11 | Panasonic Intellectual Property Management Co., Ltd. | Sprue-bush and method for manufacturing sprue-bush |
US11117329B2 (en) | 2018-06-26 | 2021-09-14 | General Electric Company | Additively manufactured build assemblies having reduced distortion and residual stress |
US11440097B2 (en) | 2019-02-12 | 2022-09-13 | General Electric Company | Methods for additively manufacturing components using lattice support structures |
JP7421663B2 (ja) | 2020-06-17 | 2024-01-24 | デーエムゲー モリ ウルトラソニック レーザーテック ゲーエムベーハー | 冷却管システムを有する部品を製造するための方法 |
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CN102282002B (zh) | 2014-07-02 |
CN102282002A (zh) | 2011-12-14 |
JPWO2010082331A1 (ja) | 2012-06-28 |
JP5421294B2 (ja) | 2014-02-19 |
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