US20200282516A1 - Powder contact member and method for surface treatment of powder contact member - Google Patents
Powder contact member and method for surface treatment of powder contact member Download PDFInfo
- Publication number
- US20200282516A1 US20200282516A1 US16/723,013 US201916723013A US2020282516A1 US 20200282516 A1 US20200282516 A1 US 20200282516A1 US 201916723013 A US201916723013 A US 201916723013A US 2020282516 A1 US2020282516 A1 US 2020282516A1
- Authority
- US
- United States
- Prior art keywords
- powder
- contacting member
- surface treatment
- abrasive
- member according
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Abandoned
Links
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B24—GRINDING; POLISHING
- B24C—ABRASIVE OR RELATED BLASTING WITH PARTICULATE MATERIAL
- B24C1/00—Methods for use of abrasive blasting for producing particular effects; Use of auxiliary equipment in connection with such methods
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
- B65D—CONTAINERS FOR STORAGE OR TRANSPORT OF ARTICLES OR MATERIALS, e.g. BAGS, BARRELS, BOTTLES, BOXES, CANS, CARTONS, CRATES, DRUMS, JARS, TANKS, HOPPERS, FORWARDING CONTAINERS; ACCESSORIES, CLOSURES, OR FITTINGS THEREFOR; PACKAGING ELEMENTS; PACKAGES
- B65D90/00—Component parts, details or accessories for large containers
- B65D90/02—Wall construction
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
- B23K26/00—Working by laser beam, e.g. welding, cutting or boring
- B23K26/352—Working by laser beam, e.g. welding, cutting or boring for surface treatment
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
- B23K26/00—Working by laser beam, e.g. welding, cutting or boring
- B23K26/36—Removing material
- B23K26/362—Laser etching
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
- B23K26/00—Working by laser beam, e.g. welding, cutting or boring
- B23K26/36—Removing material
- B23K26/38—Removing material by boring or cutting
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B24—GRINDING; POLISHING
- B24B—MACHINES, DEVICES, OR PROCESSES FOR GRINDING OR POLISHING; DRESSING OR CONDITIONING OF ABRADING SURFACES; FEEDING OF GRINDING, POLISHING, OR LAPPING AGENTS
- B24B1/00—Processes of grinding or polishing; Use of auxiliary equipment in connection with such processes
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B24—GRINDING; POLISHING
- B24B—MACHINES, DEVICES, OR PROCESSES FOR GRINDING OR POLISHING; DRESSING OR CONDITIONING OF ABRADING SURFACES; FEEDING OF GRINDING, POLISHING, OR LAPPING AGENTS
- B24B37/00—Lapping machines or devices; Accessories
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B24—GRINDING; POLISHING
- B24C—ABRASIVE OR RELATED BLASTING WITH PARTICULATE MATERIAL
- B24C1/00—Methods for use of abrasive blasting for producing particular effects; Use of auxiliary equipment in connection with such methods
- B24C1/08—Methods for use of abrasive blasting for producing particular effects; Use of auxiliary equipment in connection with such methods for polishing surfaces, e.g. smoothing a surface by making use of liquid-borne abrasives
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B24—GRINDING; POLISHING
- B24C—ABRASIVE OR RELATED BLASTING WITH PARTICULATE MATERIAL
- B24C11/00—Selection of abrasive materials or additives for abrasive blasts
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
- B65D—CONTAINERS FOR STORAGE OR TRANSPORT OF ARTICLES OR MATERIALS, e.g. BAGS, BARRELS, BOTTLES, BOXES, CANS, CARTONS, CRATES, DRUMS, JARS, TANKS, HOPPERS, FORWARDING CONTAINERS; ACCESSORIES, CLOSURES, OR FITTINGS THEREFOR; PACKAGING ELEMENTS; PACKAGES
- B65D88/00—Large containers
- B65D88/26—Hoppers, i.e. containers having funnel-shaped discharge sections
Definitions
- the present invention relates to a powder-contacting member (e.g., a hopper or the like) which is used in a portion with which powder comes into contact in a device or equipment which handles powder in supply, transport, or measure of the powder, and has a surface on which adhesion of the powder is prevented by surface treatment and powder flowability is improved, and a method for surface treatment of a powder-contacting member.
- a powder-contacting member e.g., a hopper or the like
- Powder usually tends to adhere to the surface of a member with which the powder comes into contact and accumulate on the surface, which causes various problems. For example, in the case where a predetermined amount of powder stored in a hopper is supplied repeatedly, when the powder adheres to the surface of the hopper and accumulates, a problem arises in that the flow rate of the powder becomes unstable and the predetermined amount of the powder cannot be supplied repeatedly.
- Japanese Patent No. 4064438 discloses the invention relating to a steel member for a powder handling apparatus which enhances capability to cause powder to peel and slip down from a steel surface by providing predetermined protrusions and recesses on the steel surface with which the powder comes into contact to thereby prevent adhesion of the powder.
- the steel member for a powder handling apparatus having a surface with which the powder including a particle or a particle aggregate having an average particle diameter or an average outer diameter of 20 ⁇ m or less comes into contact. Additionally, on the surface with which the powder comes into contact, the predetermined protrusions and recesses are formed.
- a pitch of the protrusion and the recess is less than the average particle diameter or the average outer diameter of the particle or the particle aggregate constituting the powder, and the pitch of the protrusion and the recess is in a range of 1 ⁇ m or less and a ratio between the height of the protrusion and the recess and the pitch thereof is 0.0005 or more such that the particle or the particle aggregate is in point contact with the protrusion.
- Japanese Patent Application Publication No. 2015-189030 discloses the invention relating to a powder adhesion prevention member which prevents adhesion of powder even when the particle diameter of the powder is small.
- the powder adhesion prevention member having a structure in which at least one surface of a base has a minute protrusion structure which includes a minute protrusion group in which a plurality of minute protrusions each formed of a hardened material having a resin composition are closely disposed, the average of distances between the adjacent minute protrusions is 500 nm or less, the cross-sectional area occupancy of a material portion forming the minute protrusion in a horizontal cross section when it is assumed that the minute protrusion is cut by a horizontal plane orthogonal to a depth direction of the minute protrusion gradually increases continuously with approach to the deepest portion of the minute protrusion from the top portion thereof, and the static contact angle of pure water on a surface on the side of the minute protrusion structure is 60° or less when it is measured by a
- Japanese Patent Application Publication No. 2017-119902 discloses the invention relating to a powder adhesion prevention titanium member capable of preventing adhesion of powder while maintaining the strength of a surface which comes into contact with the powder.
- the powder adhesion prevention titanium member including a surface layer portion which is formed of any of nitride, carbide, and carbonitride, has a hardness higher than that of an internal portion, and has an uneven surface which comes into contact with the powder.
- the arithmetic average roughness Ra of the uneven surface is 0.4 ⁇ m or more and 2.0 ⁇ m or less, and the Vickers hardness of the surface layer portion is 400 or more.
- the Publication 2017-119902 describes, with regard to the powder to be handled, a silver particle having a median diameter of 1.5 ⁇ m, a nickel particle having a median diameter of 2.5 ⁇ m, powder paint having a median diameter of 23 ⁇ m, and alumina having a median diameter of 8 ⁇ m in the example.
- Japanese Patent Application Publication No. 2017-128101 discloses the invention relating to a powder adhesion prevention member capable of preventing adhesion of powder while maintaining the strength of a surface which comes into contact with the powder.
- the powder adhesion prevention member including a film which has nickel as the main ingredient (may further contain at least one of phosphorous, boron, tungsten, molybdenum, and cobalt) and has an uneven surface which comes into contact with the powder.
- the arithmetic average roughness Ra of the uneven surface is 0.2 ⁇ m or more and 1.6 ⁇ m or less, and the Vickers hardness of the film is 400 or more.
- the film may contain an inorganic fine particle which displays abrasion resistance or a fine particle which displays lubricity, and describes, with regard to the powder to be handled, a silver particle having a median diameter of 1.5 ⁇ m, a copper particle having a median diameter of 22.3 ⁇ m, a PTFE particle having a median diameter of 0.3 ⁇ m, and an alumina particle having a median diameter of 8 ⁇ m in the example.
- the invention described in the U.S. Pat. No. 4,064,438 has a problem that the invention cannot be applied to powder having a size of more than 20 ⁇ m.
- the size of edible flour is about 30 to 40 ⁇ m.
- the invention described in the Publication 2015-189030 has a problem that an inorganic particle is not a target particle to be handled.
- the invention described in the Publication 2017-119902 can be applied to a member made of titanium, but the invention has a problem that the invention cannot be applied to a member made of SUS (stainless steel) which is often used as the material of the powder handling apparatus.
- SUS stainless steel
- the invention described in the Publication 2017-128101 has a problem that the film may peel off and become a foreign object.
- the shape of the surface which comes into contact with the powder is determined by using a two-dimensional index (two-dimensional roughness parameter) which represents the state of unevenness of a cross section orthogonal to the surface.
- the surface which comes into contact with powder needs two-dimensional roughness of a certain level or higher, and hence each of the existing techniques described above has the effect of reducing adhesion in the case where the powder is regarded as a single particle.
- the present invention has been made by focusing attention on three-dimensional roughness parameters of a surface (texture, in other words, inherent quality) with which powder comes into contact as the result of elaborate studies and researches described later, and an object thereof is to provide a powder-contacting member which prevents adhesion of powder even when the powder coming into contact with a surface is not only in the form of a single particle but also in the form of a layer (particle layer), and has high flowability, and a method for the surface treatment of a powder-contacting member.
- a powder-contacting member according to the present invention having a surface with which powder comes into contact and on which surface treatment is performed is characterized by that an arithmetic average peak curvature Spc (1/mm) of the surface is 150 to 400, a peak density Spd (piece/mm 2 ) of the surface is 10000 to 180000, a root mean square gradient Sdq of the surface is 0.05 to 0.30, and an arithmetic average height Sa ( ⁇ m) of the surface is 0.02 to 3.00.
- the powder-contacting member may be formed of a steel material or a ceramic material.
- the surface treatment is blasting process, however, it may be any of hand polishing, lapping, buffing, CMP, laser machining, etching, and cutting.
- a method for surface treatment of a powder-contacting member according to the present invention having a surface with which powder comes into contact comprises:
- an arithmetic average peak curvature Spc (1/mm) of the surface is 150 to 400
- a peak density Spd (piece/mm 2 ) of the surface is 10000 to 180000
- a root mean square gradient Sdq of the surface is 0.05 to 0.30
- an arithmetic average height Sa ( ⁇ m) of the surface is 0.02 to 3.00.
- the surface treatment is blasting process.
- an abrasive used in the blasting process is an elastic abrasive obtained by dispersing an abrasive grain into an elastic material or an elastic abrasive obtained by adhering an abrasive grain to a surface of a core formed of an elastic material.
- an abrasive used in the blasting process may be a metal-based abrasive or a ceramic-based abrasive.
- a particle size of the abrasive used in the blasting process is #30 to #20000.
- the abrasive used in the blasting process is ejected with an ejection pressure of 0.01 to 0.5 MPa and an ejection distance of 50 to 150 mm.
- the surface treatment may be any of hand polishing, lapping, buffing, CMP, laser machining, etching, and cutting.
- the powder-contacting member of the present invention described above includes the surface (texture) having the predetermined three-dimensional roughness parameters, whereby the powder-contacting member has an advantage that, not only in the case where the powder on the surface is in the form of the single particle but also in the case where the powder is in the form of the particle layer (layer form), adhesion is effectively prevented, flowability on the surface is improved, and the range of the particle size of the powder to the powder-contacting member can be widely applied.
- the surface treatment for forming the surface (texture) having the three-dimensional roughness parameters defined in the present invention can be carried out by using existing means, and it is possible to treat easily in a short time period.
- the present invention has an advantage that the present invention can be applied to the powder-contacting member regardless of the material or shape of the powder-contacting member, and the present invention can also be applied even to an existing product (powder-contacting member) (it is only required that the surface having the three-dimensional roughness parameters defined in the present invention is formed by the surface treatment).
- the present invention has an advantage that it is not necessary to form a film on the surface, i.e., it is not necessary to newly form a substance which may invite the mixing of a foreign object.
- the present invention forms a surface (texture) having predetermined three-dimensional roughness parameters described later by performing surface treatment on the surface of a powder-contacting member which comes into contact with powder to prevent adhesion of the powder.
- the powder-contacting member of the present invention is not particularly limited as long as the powder-contacting member is used in a portion with which powder comes into contact in a device or equipment which handles powder in supply, transport, or measure of the powder (e.g., a hopper or a chute).
- the powder-contacting member may be formed of, e.g., metal or ceramic.
- Examples of the metal include stainless steel, a titanium alloy, an aluminum alloy, a nickel-based alloy, and various iron alloys
- examples of the ceramic include zirconia, alumina, silicon carbide, quartz, and glass.
- the present inventors have focused attention on three-dimensional roughness parameters on a surface with which the powder comes into contact, and have conducted elaborate studies. Based on knowledge obtained as a result, it has been found that, on the surface (texture) of the powder-contacting member, the number of contact points with powder which is in the form of a particle layer (layer form) is small, and the flow of the particle layer is improved by providing space where an air layer can exist between the particle layer and the surface.
- an arithmetic average peak curvature Spc of the surface is 150 to 400, a peak density Spd thereof is 10000 to 180000, a root mean square gradient Sdq thereof is 0.05 to 0.30, and an arithmetic average height Sa thereof is 0.02 to 3.00.
- the arithmetic average peak curvature Spc (unit: 1/mm) is a parameter indicative of the average of the principal curvatures of peaks on the surface (i.e., the state of microscopic protrusions and recesses on the target surface is evaluated as the average of the curvatures of the peaks), and is defined in ISO25178.
- the peak density Spd is a parameter indicative of the number of peaks per unit area, and is defined in ISO25178.
- Spd unit: piece/mm 2
- the root mean square gradient Sdq is a parameter calculated from the root mean square of gradients at all points in a defined area (i.e., corresponds to a parameter obtained by applying a root mean square gradient Rdq on a roughness curve to the surface), and is defined in ISO25178.
- the arithmetic average height Sa (unit: ⁇ m) is a parameter indicative of the average of absolute values of height differences between the individual points and the average surface of the surface (i.e., corresponds to a parameter obtained by applying an arithmetic average height Ra of the roughness curve to the surface), and is defined in ISO25178.
- an example of the surface treatment used in the present invention includes blasting process.
- the surface (texture) having the predetermined three-dimensional roughness parameters of the present invention described above is formed by using one or more of abrasives described below.
- abrasives as the abrasive used in the blasting process and, for example, a metal-based abrasive, a ceramic-based abrasive, and an elastic abrasive are suitably used.
- examples of the material of the metal-based abrasive include steel, high-speed steel, stainless steel, and iron chromium boron
- examples of the material of the ceramic-based abrasive include alumina, zirconia, zircon, silicon carbide, and glass.
- the elastic abrasive includes an elastic abrasive obtained by dispersing abrasive grains into an elastic body (base material) such as rubber or elastomer [“SIRIUS” (registered trademark) manufactured by Fuji Manufacturing Co., Ltd.] or an elastic abrasive obtained by causing the surface of the elastic body to carry abrasive grains [“SIRIUS Z” (registered trademark) manufactured by Fuji Manufacturing Co., Ltd.].
- the elastic abrasive obtained by causing the surface of the elastic body to carry abrasive grains may also be an elastic abrasive obtained by adhering and fixing abrasive grains to the surface of the elastic body having self-adhesion.
- an elastic abrasive obtained by adhering and fixing abrasive grains to the surface of the elastic body after an adhesive is applied to the surface of the elastic body.
- an elastic abrasive obtained by dispersing abrasive grains into the elastic body there may be used, e.g., an elastic abrasive obtained by blending and dispersing 10 to 90 wt % of abrasive grains into 90 to 10 wt % of a base material serving as the elastic body, an elastic abrasive obtained by blending 70 wt % or more of the abrasive grains into the base material, and an elastic abrasive obtained by further adding and blending a coloring material such as dye or pigment to each elastic abrasive described above, or by adding and blending a fluorescent coloring agent and/or an aromatic and an antimicrobial agent to each elastic abrasive described above in addition to the coloring material.
- a coloring material such as dye or pigment
- an elastic abrasive which includes a core having a rubber hardness of 30 or less and a predetermined particle diameter and made from a crosslinked polyrotaxane compound having self-adhesion, and an abrasive grain layer formed on the surface of the core, and in which the abrasive grain layer has a masonry structure of a plurality of abrasive grains which have an average particle diameter of 0.1 ⁇ m to 12 ⁇ m and are bonded to each other in a thickness direction by the crosslinked polyrotaxane compound, an elastic abrasive in which the compression set of the core is 5% or less, and the vibration absorption property of 1 Hz to 100 kHz (tan ⁇ ) is 0.3 or more, an elastic abrasive in which the thickness of the abrasive grain layer is less than 1
- the shape of the abrasive described above is not particularly limited, and it is possible to use a spherical abrasive or an abrasive having no regular shape.
- an abrasive having a size which falls within a range of #30 (500 ⁇ m to 600 ⁇ m JIS R 6000-1 2017 sieve analysis test sieve three stages+fourth stage) to #20000 [0.5 ⁇ m (median diameter D50): measurement by a laser diffraction scattering method (measurement apparatus: Microtrac X100 manufactured by MicrotracBEL Corp.)] is suitably used.
- a compressed-gas-type sandblasting apparatus is suitably used.
- the compressed-gas-type sandblasting apparatus ejects an abrasive (medium) toward a workpiece by using energy of compressed gas (air, argon, or nitrogen) with a nozzle to perform treatment.
- compressed gas air, argon, or nitrogen
- Examples of the compressed-gas-type sandblasting apparatus include a suction-type blasting apparatus which sucks the abrasive with negative pressure generated by compressed gas ejection and ejects the abrasive together with compressed air (example: SFK-2 manufactured by Fuji Manufacturing Co., Ltd.), a gravity-type blasting apparatus which ejects the abrasive falling from a tank with compressed air which carries the abrasive (example: SGF-4 manufactured by Fuji Manufacturing Co., Ltd.), a direct-pressure-type blasting apparatus in which compressed gas is supplied into a tank into which the abrasive is charged, the abrasive transported from the compressed gas in the tank is carried by flow of additionally provided compressed air, and the abrasive is ejected from a blast gun (example: FDQ-2 manufactured by Fuji Manufacturing Co., Ltd.), and a blower-type blasting apparatus in which the direct-pressure-type compressed gas is generated by a blower unit and is
- an ejection pressure is preferably 0.04 MPa to 0.6 MPa, and an ejection distance is preferably 50 to 150 mm.
- the surface treatment of the present invention surface treatment methods other than the above-described blasting process may also be used, and the surface shape (texture) having the three-dimensional roughness parameters defined in the present invention may be formed by using, e.g., various polishing processes (hand polishing, lapping, buffing, and CMP), laser machining, etching, and cutting.
- various polishing processes hand polishing, lapping, buffing, and CMP
- laser machining etching, and cutting.
- a surface having the three-dimensional roughness parameters defined in the present invention was actually formed by performing the surface treatment on the surface with which powder came into contact, and a determination test of the effect of preventing powder adhesion to the surface was performed. The result of the determination test is shown below.
- the surface treatment was performed on each of workpieces (Examples 1 to 4) serving as test targets and the surface having the predetermined three-dimensional roughness parameters of the present invention was thereby formed, and the effect of preventing the adhesion of the powder to the surface was then observed.
- a method for measuring the surface roughness after the surface treatment in the present examples, the measurement was performed with a measurement magnification of 1000 times by using a shape analysis laser microscope (VK-X250 manufactured by KEYENCE CORPORATION.). Subsequently, roughness analysis was performed on measured data by using the supplied analysis software of the laser microscope “multifile analysis application VK-H1XM”.
- VK-X250 manufactured by KEYENCE CORPORATION.
- VK-H1XM multifile analysis application
- Workpiece Screw for powder transport material: SUS304
- Workpiece size ⁇ 25 mm ⁇ L 400 mm
- Workpiece Hopper for powder transport material: SUS304
- Workpiece size Inner diameter ⁇ 300 mm, Height 270 mm Powder Powder for pill Particle diameter 29 ⁇ m
- Sdq 0.151 parameters Effect Adhesion to a wall surface of the hopper was reduced. Occurrence of a rathole was also reduced.
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Physics & Mathematics (AREA)
- Optics & Photonics (AREA)
- Plasma & Fusion (AREA)
- Other Surface Treatments For Metallic Materials (AREA)
- Powder Metallurgy (AREA)
- Application Of Or Painting With Fluid Materials (AREA)
Abstract
Description
- The present invention relates to a powder-contacting member (e.g., a hopper or the like) which is used in a portion with which powder comes into contact in a device or equipment which handles powder in supply, transport, or measure of the powder, and has a surface on which adhesion of the powder is prevented by surface treatment and powder flowability is improved, and a method for surface treatment of a powder-contacting member.
- Powder usually tends to adhere to the surface of a member with which the powder comes into contact and accumulate on the surface, which causes various problems. For example, in the case where a predetermined amount of powder stored in a hopper is supplied repeatedly, when the powder adheres to the surface of the hopper and accumulates, a problem arises in that the flow rate of the powder becomes unstable and the predetermined amount of the powder cannot be supplied repeatedly.
- To cope with this, various inventions for solving the problems caused by the adhesion and the accumulation of the powder described above are proposed.
- For example, Japanese Patent No. 4064438 discloses the invention relating to a steel member for a powder handling apparatus which enhances capability to cause powder to peel and slip down from a steel surface by providing predetermined protrusions and recesses on the steel surface with which the powder comes into contact to thereby prevent adhesion of the powder. Specifically, there is disclosed the steel member for a powder handling apparatus having a surface with which the powder including a particle or a particle aggregate having an average particle diameter or an average outer diameter of 20 μm or less comes into contact. Additionally, on the surface with which the powder comes into contact, the predetermined protrusions and recesses are formed. A pitch of the protrusion and the recess is less than the average particle diameter or the average outer diameter of the particle or the particle aggregate constituting the powder, and the pitch of the protrusion and the recess is in a range of 1 μm or less and a ratio between the height of the protrusion and the recess and the pitch thereof is 0.0005 or more such that the particle or the particle aggregate is in point contact with the protrusion.
- In addition, Japanese Patent Application Publication No. 2015-189030 discloses the invention relating to a powder adhesion prevention member which prevents adhesion of powder even when the particle diameter of the powder is small. Specifically, there is described the powder adhesion prevention member having a structure in which at least one surface of a base has a minute protrusion structure which includes a minute protrusion group in which a plurality of minute protrusions each formed of a hardened material having a resin composition are closely disposed, the average of distances between the adjacent minute protrusions is 500 nm or less, the cross-sectional area occupancy of a material portion forming the minute protrusion in a horizontal cross section when it is assumed that the minute protrusion is cut by a horizontal plane orthogonal to a depth direction of the minute protrusion gradually increases continuously with approach to the deepest portion of the minute protrusion from the top portion thereof, and the static contact angle of pure water on a surface on the side of the minute protrusion structure is 60° or less when it is measured by a half-angle method. Further, the Publication 2015-189030 describes that, with regard to the particle diameter of the powder to be handled, the powder adhesion prevention member can be suitably used for the powder having a particle diameter of 0.1 to 30 μm.
- In addition, Japanese Patent Application Publication No. 2017-119902 discloses the invention relating to a powder adhesion prevention titanium member capable of preventing adhesion of powder while maintaining the strength of a surface which comes into contact with the powder. Specifically, there is described the powder adhesion prevention titanium member including a surface layer portion which is formed of any of nitride, carbide, and carbonitride, has a hardness higher than that of an internal portion, and has an uneven surface which comes into contact with the powder. The arithmetic average roughness Ra of the uneven surface is 0.4 μm or more and 2.0 μm or less, and the Vickers hardness of the surface layer portion is 400 or more. Further, the Publication 2017-119902 describes, with regard to the powder to be handled, a silver particle having a median diameter of 1.5 μm, a nickel particle having a median diameter of 2.5 μm, powder paint having a median diameter of 23 μm, and alumina having a median diameter of 8 μm in the example.
- Japanese Patent Application Publication No. 2017-128101 discloses the invention relating to a powder adhesion prevention member capable of preventing adhesion of powder while maintaining the strength of a surface which comes into contact with the powder. Specifically, there is described the powder adhesion prevention member including a film which has nickel as the main ingredient (may further contain at least one of phosphorous, boron, tungsten, molybdenum, and cobalt) and has an uneven surface which comes into contact with the powder. The arithmetic average roughness Ra of the uneven surface is 0.2 μm or more and 1.6 μm or less, and the Vickers hardness of the film is 400 or more. Note that the Publication 2017-128101 describes that the film may contain an inorganic fine particle which displays abrasion resistance or a fine particle which displays lubricity, and describes, with regard to the powder to be handled, a silver particle having a median diameter of 1.5 μm, a copper particle having a median diameter of 22.3 μm, a PTFE particle having a median diameter of 0.3 μm, and an alumina particle having a median diameter of 8 μm in the example.
- However, the inventions described in the Related Arts described above have the following problems.
- First, the invention described in the U.S. Pat. No. 4,064,438 has a problem that the invention cannot be applied to powder having a size of more than 20 μm. For example, the size of edible flour is about 30 to 40 μm.
- In addition, the invention described in the Publication 2015-189030 has a problem that an inorganic particle is not a target particle to be handled.
- The invention described in the Publication 2017-119902 can be applied to a member made of titanium, but the invention has a problem that the invention cannot be applied to a member made of SUS (stainless steel) which is often used as the material of the powder handling apparatus.
- The invention described in the Publication 2017-128101 has a problem that the film may peel off and become a foreign object.
- Further, in each of the inventions described in the U.S. Pat. No. 4,064,438, the Publication 2015-189030, the Publication 2017-119902, and the Publication 2017-128101, the shape of the surface which comes into contact with the powder is determined by using a two-dimensional index (two-dimensional roughness parameter) which represents the state of unevenness of a cross section orthogonal to the surface.
- When Kotaro Iida et al. “Measurement of the Adhesive Force between Particles and a Substrate by Means of the Impact Separation Method. Effect of the Surface Roughness and Type of Material of the Substrate” (Chem. Pharm. Bull. 41 (9) 1621-1625 (1993) haps://www.jstage.jst.go.jp/article/cpb1958/41/9/41_9_1621/_pdf/-char/en) is taken as an example, it is reported that the adhesive force between a flat surface having a certain level of roughness and a single particle sharply decreases when the arithmetic average roughness Ra (two-dimensional roughness parameter) increases, and the adhesive force gradually decreases as the Ra increases from a specific numerical value.
- In the present invention as well, the surface which comes into contact with powder needs two-dimensional roughness of a certain level or higher, and hence each of the existing techniques described above has the effect of reducing adhesion in the case where the powder is regarded as a single particle.
- However, as the result of elaborate studies conducted by the inventors, it has been found that, at a site where powder is actually handled, powder flows on a hopper or a chute in a state in which the powder is not in the form of a single particle but in the form of a layer (particle layer), and hence it is necessary to consider surface contact between the particle layer and a contact surface (flat surface), and, in the case where consideration is given to the surface contact, a two-dimensional index (two-dimensional roughness parameter) such as a line roughness parameter (JIS B 0601) which is often used in existing theses and the above Related Arts is not adequate.
- In view of the problems described above, the present invention has been made by focusing attention on three-dimensional roughness parameters of a surface (texture, in other words, inherent quality) with which powder comes into contact as the result of elaborate studies and researches described later, and an object thereof is to provide a powder-contacting member which prevents adhesion of powder even when the powder coming into contact with a surface is not only in the form of a single particle but also in the form of a layer (particle layer), and has high flowability, and a method for the surface treatment of a powder-contacting member.
- In order to achieve the above object, a powder-contacting member according to the present invention having a surface with which powder comes into contact and on which surface treatment is performed, is characterized by that an arithmetic average peak curvature Spc (1/mm) of the surface is 150 to 400, a peak density Spd (piece/mm2) of the surface is 10000 to 180000, a root mean square gradient Sdq of the surface is 0.05 to 0.30, and an arithmetic average height Sa (μm) of the surface is 0.02 to 3.00.
- The powder-contacting member may be formed of a steel material or a ceramic material.
- Preferably, the surface treatment is blasting process, however, it may be any of hand polishing, lapping, buffing, CMP, laser machining, etching, and cutting.
- A method for surface treatment of a powder-contacting member according to the present invention having a surface with which powder comes into contact comprises:
- performing surface treatment on the surface such that an arithmetic average peak curvature Spc (1/mm) of the surface is 150 to 400, a peak density Spd (piece/mm2) of the surface is 10000 to 180000, a root mean square gradient Sdq of the surface is 0.05 to 0.30, and an arithmetic average height Sa (μm) of the surface is 0.02 to 3.00.
- In the method of the present invention, it is preferable that the surface treatment is blasting process.
- Preferably, an abrasive used in the blasting process is an elastic abrasive obtained by dispersing an abrasive grain into an elastic material or an elastic abrasive obtained by adhering an abrasive grain to a surface of a core formed of an elastic material.
- Alternatively, an abrasive used in the blasting process may be a metal-based abrasive or a ceramic-based abrasive.
- It is preferable that a particle size of the abrasive used in the blasting process is #30 to #20000.
- Preferably, the abrasive used in the blasting process is ejected with an ejection pressure of 0.01 to 0.5 MPa and an ejection distance of 50 to 150 mm.
- Other than the blasting process, the surface treatment may be any of hand polishing, lapping, buffing, CMP, laser machining, etching, and cutting.
- The powder-contacting member of the present invention described above includes the surface (texture) having the predetermined three-dimensional roughness parameters, whereby the powder-contacting member has an advantage that, not only in the case where the powder on the surface is in the form of the single particle but also in the case where the powder is in the form of the particle layer (layer form), adhesion is effectively prevented, flowability on the surface is improved, and the range of the particle size of the powder to the powder-contacting member can be widely applied.
- In addition, the surface treatment for forming the surface (texture) having the three-dimensional roughness parameters defined in the present invention can be carried out by using existing means, and it is possible to treat easily in a short time period.
- Further, the present invention has an advantage that the present invention can be applied to the powder-contacting member regardless of the material or shape of the powder-contacting member, and the present invention can also be applied even to an existing product (powder-contacting member) (it is only required that the surface having the three-dimensional roughness parameters defined in the present invention is formed by the surface treatment).
- Furthermore, the present invention has an advantage that it is not necessary to form a film on the surface, i.e., it is not necessary to newly form a substance which may invite the mixing of a foreign object.
- Hereinbelow, an embodiment of the present invention will be described.
- The present invention forms a surface (texture) having predetermined three-dimensional roughness parameters described later by performing surface treatment on the surface of a powder-contacting member which comes into contact with powder to prevent adhesion of the powder.
- The powder-contacting member of the present invention is not particularly limited as long as the powder-contacting member is used in a portion with which powder comes into contact in a device or equipment which handles powder in supply, transport, or measure of the powder (e.g., a hopper or a chute). In addition, the powder-contacting member may be formed of, e.g., metal or ceramic.
- Examples of the metal include stainless steel, a titanium alloy, an aluminum alloy, a nickel-based alloy, and various iron alloys, and examples of the ceramic include zirconia, alumina, silicon carbide, quartz, and glass.
- In addition, as described above, in order to improve the effect of preventing adhesion of powder in the powder-contacting member, the present inventors have focused attention on three-dimensional roughness parameters on a surface with which the powder comes into contact, and have conducted elaborate studies. Based on knowledge obtained as a result, it has been found that, on the surface (texture) of the powder-contacting member, the number of contact points with powder which is in the form of a particle layer (layer form) is small, and the flow of the particle layer is improved by providing space where an air layer can exist between the particle layer and the surface.
- In addition, it has been found that, however, when the curvature of a point where the particle layer and the flat surface come into contact with each other is high or sharp, the particle layer is easily snagged on the tip of the point, and hence a certain level of roundness (curvature) is necessary. Further, it has been found that, when the gradient of a peak on the surface (texture) is steep, frictional resistance tends to increase, and hence the gradient needs to have a certain level of gentleness. Furthermore, it has been found that, however, when the gradient is extremely or too moderate, the air layer cannot exist between the particle layer and the surface (texture surface), and hence the gradient needs to have a value in a specific range.
- As the result of elaborate studies based on the above knowledge, it has been found that the surface (texture) with which the powder comes into contact has predetermined three-dimensional roughness parameters, i.e., from the viewpoint of powder adhesion prevention, it is preferable that an arithmetic average peak curvature Spc of the surface is 150 to 400, a peak density Spd thereof is 10000 to 180000, a root mean square gradient Sdq thereof is 0.05 to 0.30, and an arithmetic average height Sa thereof is 0.02 to 3.00.
- Note that the arithmetic average peak curvature Spc (unit: 1/mm) is a parameter indicative of the average of the principal curvatures of peaks on the surface (i.e., the state of microscopic protrusions and recesses on the target surface is evaluated as the average of the curvatures of the peaks), and is defined in ISO25178.
- The peak density Spd is a parameter indicative of the number of peaks per unit area, and is defined in ISO25178. When the value of Spd (unit: piece/mm2) is large, it is usually suggested that the number of contact points with another object is large.
- The root mean square gradient Sdq is a parameter calculated from the root mean square of gradients at all points in a defined area (i.e., corresponds to a parameter obtained by applying a root mean square gradient Rdq on a roughness curve to the surface), and is defined in ISO25178.
- The arithmetic average height Sa (unit: μm) is a parameter indicative of the average of absolute values of height differences between the individual points and the average surface of the surface (i.e., corresponds to a parameter obtained by applying an arithmetic average height Ra of the roughness curve to the surface), and is defined in ISO25178.
- The units described above are identical to the units of the three-dimensional roughness parameters described in the present specification.
- Next, a method for surface treatment for forming the surface (texture) of the present invention described above will be followed. Note that, in the present invention, it is possible to use various surface treatment methods.
- First, an example of the surface treatment used in the present invention includes blasting process.
- In the blasting process, the surface (texture) having the predetermined three-dimensional roughness parameters of the present invention described above is formed by using one or more of abrasives described below.
- It is possible to use various abrasives as the abrasive used in the blasting process and, for example, a metal-based abrasive, a ceramic-based abrasive, and an elastic abrasive are suitably used.
- Specifically, examples of the material of the metal-based abrasive include steel, high-speed steel, stainless steel, and iron chromium boron, and examples of the material of the ceramic-based abrasive include alumina, zirconia, zircon, silicon carbide, and glass.
- The elastic abrasive includes an elastic abrasive obtained by dispersing abrasive grains into an elastic body (base material) such as rubber or elastomer [“SIRIUS” (registered trademark) manufactured by Fuji Manufacturing Co., Ltd.] or an elastic abrasive obtained by causing the surface of the elastic body to carry abrasive grains [“SIRIUS Z” (registered trademark) manufactured by Fuji Manufacturing Co., Ltd.]. Note that the elastic abrasive obtained by causing the surface of the elastic body to carry abrasive grains may also be an elastic abrasive obtained by adhering and fixing abrasive grains to the surface of the elastic body having self-adhesion. Alternatively, an elastic abrasive obtained by adhering and fixing abrasive grains to the surface of the elastic body after an adhesive is applied to the surface of the elastic body.
- In addition, as the above-described elastic abrasive obtained by dispersing abrasive grains into the elastic body (base material), there may be used, e.g., an elastic abrasive obtained by blending and dispersing 10 to 90 wt % of abrasive grains into 90 to 10 wt % of a base material serving as the elastic body, an elastic abrasive obtained by blending 70 wt % or more of the abrasive grains into the base material, and an elastic abrasive obtained by further adding and blending a coloring material such as dye or pigment to each elastic abrasive described above, or by adding and blending a fluorescent coloring agent and/or an aromatic and an antimicrobial agent to each elastic abrasive described above in addition to the coloring material.
- In addition, as the above-described elastic abrasive obtained by causing the surface of the elastic body to carry abrasive grains, there may be used, e.g., an elastic abrasive which includes a core having a rubber hardness of 30 or less and a predetermined particle diameter and made from a crosslinked polyrotaxane compound having self-adhesion, and an abrasive grain layer formed on the surface of the core, and in which the abrasive grain layer has a masonry structure of a plurality of abrasive grains which have an average particle diameter of 0.1 μm to 12 μm and are bonded to each other in a thickness direction by the crosslinked polyrotaxane compound, an elastic abrasive in which the compression set of the core is 5% or less, and the vibration absorption property of 1 Hz to 100 kHz (tan δ) is 0.3 or more, an elastic abrasive in which the thickness of the abrasive grain layer is less than ¼ of the minor axis of the elastic abrasive, an elastic abrasive in which the rubber hardness of the core is 10 or less, an elastic abrasive in which the compression set of the core is 1% or less, an elastic abrasive in which the crosslinked polyrotaxane compound is obtained by crosslinking one compound selected from among polycarbonate diol and acrylate copolymers, and polyrotaxane, an elastic abrasive in which the crosslinked polyrotaxane compound is crosslinked by using a crosslinker including an isocyanate compound, an elastic abrasive in which the polyrotaxane is obtained by causing polyethylene glycol to pass through the opening of a α-cyclodextrin molecule and coupling an adamantane group to each end of the polyethylene glycol, an elastic abrasive in which part of a hydroxyl group of the α-cyclodextrin molecule is substituted by a polycaprolactone group, and an elastic abrasive in which a silane coupling agent is blended into the crosslinked polyrotaxane compound.
- The shape of the abrasive described above is not particularly limited, and it is possible to use a spherical abrasive or an abrasive having no regular shape. With regard to the size of the abrasive, an abrasive having a size which falls within a range of #30 (500 μm to 600 μm JIS R 6000-1 2017 sieve analysis test sieve three stages+fourth stage) to #20000 [0.5 μm (median diameter D50): measurement by a laser diffraction scattering method (measurement apparatus: Microtrac X100 manufactured by MicrotracBEL Corp.)] is suitably used.
- In addition, in the blasting process used as the surface treatment of the present invention, a compressed-gas-type sandblasting apparatus is suitably used.
- The compressed-gas-type sandblasting apparatus ejects an abrasive (medium) toward a workpiece by using energy of compressed gas (air, argon, or nitrogen) with a nozzle to perform treatment.
- Examples of the compressed-gas-type sandblasting apparatus include a suction-type blasting apparatus which sucks the abrasive with negative pressure generated by compressed gas ejection and ejects the abrasive together with compressed air (example: SFK-2 manufactured by Fuji Manufacturing Co., Ltd.), a gravity-type blasting apparatus which ejects the abrasive falling from a tank with compressed air which carries the abrasive (example: SGF-4 manufactured by Fuji Manufacturing Co., Ltd.), a direct-pressure-type blasting apparatus in which compressed gas is supplied into a tank into which the abrasive is charged, the abrasive transported from the compressed gas in the tank is carried by flow of additionally provided compressed air, and the abrasive is ejected from a blast gun (example: FDQ-2 manufactured by Fuji Manufacturing Co., Ltd.), and a blower-type blasting apparatus in which the direct-pressure-type compressed gas is generated by a blower unit and is ejected (example: LDQ-2 manufactured by Fuji Manufacturing Co., Ltd.).
- With regard to blasting ejection conditions in the case where the above-described blasting apparatus is used, as an example, an ejection pressure is preferably 0.04 MPa to 0.6 MPa, and an ejection distance is preferably 50 to 150 mm.
- In addition, as the surface treatment of the present invention, surface treatment methods other than the above-described blasting process may also be used, and the surface shape (texture) having the three-dimensional roughness parameters defined in the present invention may be formed by using, e.g., various polishing processes (hand polishing, lapping, buffing, and CMP), laser machining, etching, and cutting.
- A surface having the three-dimensional roughness parameters defined in the present invention was actually formed by performing the surface treatment on the surface with which powder came into contact, and a determination test of the effect of preventing powder adhesion to the surface was performed. The result of the determination test is shown below.
- With regard to a test method, the surface treatment was performed on each of workpieces (Examples 1 to 4) serving as test targets and the surface having the predetermined three-dimensional roughness parameters of the present invention was thereby formed, and the effect of preventing the adhesion of the powder to the surface was then observed.
- Note that, with regard to a method for measuring the surface roughness after the surface treatment, in the present examples, the measurement was performed with a measurement magnification of 1000 times by using a shape analysis laser microscope (VK-X250 manufactured by KEYENCE CORPORATION.). Subsequently, roughness analysis was performed on measured data by using the supplied analysis software of the laser microscope “multifile analysis application VK-H1XM”. With regard to the analysis, first, a reference surface setting (the reference surface setting creates a surface on which a reference surface height is zero from height data with the least squares method) was performed by using an “image processing” function, and the three-dimensional roughness parameters were then calculated in a surface roughness mode.
- The content of the surface treatment performed on the workpiece, the roughness parameters of the surface, the type of powder for determining whether powder adhesion was prevented, and the result of observation (effect) were summarized for each workpiece in Tables 1 to 4 shown below.
-
-
Workpiece Hopper for food production line (material: SUS304) Workpiece size Inner diameter 470 mm, Height 410 mm Powder Flour Particle diameter 37 μm Treatment method Blasting process Roughness Sa = 1.5 Spc = 180 Spd = 27678 Sdq = 0.147 parameters Effect Adhesion to the hopper was reduced. -
-
Workpiece Chute for powder transport (material: SUS304) Workpiece size L 400 mm, Height 40 mm, V shape Powder Aluminum hydroxide Average particle 70 μm diameter Treatment method Blasting process Roughness Sa = 3.0 Spc = 209 Spd = 16483 Sdq = 0.264 parameters Effect An improvement in the flow of the powder solved the problem that the powder was partially adhered and the flow was stopped. -
-
Workpiece Screw for powder transport (material: SUS304) Workpiece size ϕ25 mm × L 400 mm Powder Barium titanate Particle diameter 3 μm Treatment method Blasting process Roughness Sa = 0.025 Spc = 370 Spd = 159240 Sdq = 0.072 parameters Effect The problem that adhesion to the screw was progressively increased and the supply amount was not maintained was solved. -
-
Workpiece Hopper for powder transport (material: SUS304) Workpiece size Inner diameter ϕ300 mm, Height 270 mm Powder Powder for pill Particle diameter 29 μm Treatment method Blasting process Roughness Sa = 0.5 Spc = 193 Spd = 22675 Sdq = 0.151 parameters Effect Adhesion to a wall surface of the hopper was reduced. Occurrence of a rathole was also reduced. - As shown in Tables 1 to 4, in the workpiece (powder-contacting member) in which the surface having the predetermined three-dimensional roughness parameters of the present invention was formed by the surface treatment, the effect of preventing powder adhesion was observed.
- Thus the broadest claims that follow are not directed to a machine that is configure in a specific way. Instead, said broadest claims are intended to protect the heart or essence of this breakthrough invention. This invention is clearly new and useful. Moreover, it was not obvious to those of ordinary skill in the art at the time it was made, in view of the related art when considered as a whole.
- Moreover, in view of the revolutionary nature of this invention, it is clearly a pioneering invention. As such, the claims that follow are entitled to very broad interpretation so as to protect the heart of this invention, as a matter of law.
- It will thus be seen that the objects set forth above, and those made apparent from the foregoing description, are efficiently attained and since certain changes may be made in the above construction without departing from the scope of the invention, it is intended that all matters contained in the foregoing description or shown in the accompanying drawings shall be interpreted as illustrative and not in a limiting sense.
- It is also to be understood that the following claims are intended to cover all of the generic and specific features of the invention herein described, and all statements of the scope of the invention which, as a matter of language, might be said to fall therebetween.
- Now that the invention has been described;
Claims (19)
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US18/097,791 US12017326B2 (en) | 2019-03-06 | 2023-01-17 | Powder contact member and method for surface treatment of powder contact member |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP2019-040412 | 2019-03-06 | ||
JP2019040412A JP7303535B2 (en) | 2019-03-06 | 2019-03-06 | POWDER CONTACT MEMBER AND POWDER CONTACT MEMBER SURFACE TREATMENT METHOD |
Related Child Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
US18/097,791 Division US12017326B2 (en) | 2019-03-06 | 2023-01-17 | Powder contact member and method for surface treatment of powder contact member |
Publications (1)
Publication Number | Publication Date |
---|---|
US20200282516A1 true US20200282516A1 (en) | 2020-09-10 |
Family
ID=72336067
Family Applications (2)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
US16/723,013 Abandoned US20200282516A1 (en) | 2019-03-06 | 2019-12-20 | Powder contact member and method for surface treatment of powder contact member |
US18/097,791 Active US12017326B2 (en) | 2019-03-06 | 2023-01-17 | Powder contact member and method for surface treatment of powder contact member |
Family Applications After (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
US18/097,791 Active US12017326B2 (en) | 2019-03-06 | 2023-01-17 | Powder contact member and method for surface treatment of powder contact member |
Country Status (4)
Country | Link |
---|---|
US (2) | US20200282516A1 (en) |
JP (1) | JP7303535B2 (en) |
KR (1) | KR20200107870A (en) |
CN (1) | CN111660207B (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN114211005A (en) * | 2021-12-20 | 2022-03-22 | 四川省有色冶金研究院有限公司 | SLM forming metal piece surface treatment method |
Families Citing this family (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP7011140B1 (en) | 2021-05-20 | 2022-01-26 | 株式会社オカノブラスト | Roughening method of member, roughening method of transport surface of transport path forming member, transport path forming member of roughened member and article |
CN113652172B (en) * | 2021-09-17 | 2022-10-21 | 河南工业大学 | Elastic abrasive and preparation method thereof |
WO2023190845A1 (en) * | 2022-03-30 | 2023-10-05 | 古河電気工業株式会社 | Copper foil and light-shielding material |
JP7409542B1 (en) * | 2023-03-24 | 2024-01-09 | 住友ベークライト株式会社 | Cover tape for electronic component packaging and electronic component packaging |
JP7409543B1 (en) * | 2023-03-24 | 2024-01-09 | 住友ベークライト株式会社 | Cover tape for electronic component packaging and electronic component packaging |
Citations (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US6869334B1 (en) * | 1999-05-28 | 2005-03-22 | Cemecon-Ceramic Metal Coatings-Dr. Ing. Antonius Leyendecker Gmbh | Process for producing a hard-material-coated component |
US20080233838A1 (en) * | 2007-03-23 | 2008-09-25 | Fuji Manufacturing Co., Ltd. | Substrate treatment method for portion to be coated |
US20120043044A1 (en) * | 2010-08-18 | 2012-02-23 | Fuji Manufacturing Co., Ltd. | Method of treating surface of mold and mold having surface treated by said method |
US20120144890A1 (en) * | 2010-12-08 | 2012-06-14 | Fuji Kihan Co., Ltd. | Instantaneous heat treatment method for metal product |
US9108295B2 (en) * | 2011-12-22 | 2015-08-18 | Dentsply International Inc. | Blasting metallic implants with titanium oxide |
US20200299811A1 (en) * | 2017-08-29 | 2020-09-24 | Nippon Light Metal Company, Ltd. | Aluminum member and method for producing same |
Family Cites Families (15)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2002346929A (en) * | 2001-05-21 | 2002-12-04 | Ishizuka Glass Co Ltd | Powder/grain supplying method and device |
JP4901184B2 (en) * | 2004-11-11 | 2012-03-21 | 株式会社不二製作所 | Abrasive material, method for producing the abrasive material, and blasting method using the abrasive material |
KR100709587B1 (en) * | 2004-11-11 | 2007-04-20 | 가부시끼가이샤 후지세이사쿠쇼 | Abrasive, a method for manufacturing the abrasive, and a method for blast processing with the use of the abrasive |
JP4064438B1 (en) * | 2007-03-22 | 2008-03-19 | 国立大学法人徳島大学 | Steel member for powder handling equipment and powder handling equipment |
JP5148183B2 (en) * | 2007-07-04 | 2013-02-20 | 株式会社不二製作所 | Blasting abrasive and blasting method using the abrasive |
JP2009087468A (en) * | 2007-09-28 | 2009-04-23 | Fujifilm Corp | Magnetic recording medium, magnetic signal reproduction method and magnetic signal reproduction system |
US8518501B2 (en) * | 2010-03-10 | 2013-08-27 | Restaurant Technology, Inc. | Food holding device, method of making, and method of storing cooked food |
BR112015010578A2 (en) * | 2012-11-09 | 2017-07-11 | Armigliato Antonio | apparatus and method for granting selected topographies for aluminum foil and their applications |
JP2015189030A (en) | 2014-03-27 | 2015-11-02 | 大日本印刷株式会社 | Powder adhesion-inhibiting member |
JP6886239B2 (en) | 2015-12-28 | 2021-06-16 | 株式会社Nbcメッシュテック | Titanium member that suppresses powder adhesion |
JP6616696B2 (en) * | 2016-01-22 | 2019-12-04 | 株式会社Nbcメッシュテック | Powder adhesion suppressing member and method of manufacturing powder adhesion suppressing member |
JP6864517B2 (en) * | 2016-03-31 | 2021-04-28 | 株式会社Nbcメッシュテック | Powder supply member and powder supply device using the member |
JP6494683B2 (en) * | 2016-05-17 | 2019-04-03 | キヤノン株式会社 | Resin molded product, camera interchangeable lens, and resin molded product manufacturing method |
MY190084A (en) * | 2016-08-25 | 2022-03-25 | Shinetsu Chemical Co | Rectangular glass substrate and method for preparing the same |
US10101149B1 (en) * | 2017-04-12 | 2018-10-16 | Ford Global Technologies, Llc | Methods to control adhesiveness using topography |
-
2019
- 2019-03-06 JP JP2019040412A patent/JP7303535B2/en active Active
- 2019-12-20 US US16/723,013 patent/US20200282516A1/en not_active Abandoned
-
2020
- 2020-02-27 CN CN202010122426.XA patent/CN111660207B/en active Active
- 2020-03-06 KR KR1020200028658A patent/KR20200107870A/en not_active Application Discontinuation
-
2023
- 2023-01-17 US US18/097,791 patent/US12017326B2/en active Active
Patent Citations (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US6869334B1 (en) * | 1999-05-28 | 2005-03-22 | Cemecon-Ceramic Metal Coatings-Dr. Ing. Antonius Leyendecker Gmbh | Process for producing a hard-material-coated component |
US20080233838A1 (en) * | 2007-03-23 | 2008-09-25 | Fuji Manufacturing Co., Ltd. | Substrate treatment method for portion to be coated |
US20120043044A1 (en) * | 2010-08-18 | 2012-02-23 | Fuji Manufacturing Co., Ltd. | Method of treating surface of mold and mold having surface treated by said method |
US20120144890A1 (en) * | 2010-12-08 | 2012-06-14 | Fuji Kihan Co., Ltd. | Instantaneous heat treatment method for metal product |
US9108295B2 (en) * | 2011-12-22 | 2015-08-18 | Dentsply International Inc. | Blasting metallic implants with titanium oxide |
US20200299811A1 (en) * | 2017-08-29 | 2020-09-24 | Nippon Light Metal Company, Ltd. | Aluminum member and method for producing same |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN114211005A (en) * | 2021-12-20 | 2022-03-22 | 四川省有色冶金研究院有限公司 | SLM forming metal piece surface treatment method |
Also Published As
Publication number | Publication date |
---|---|
US20230150088A1 (en) | 2023-05-18 |
JP7303535B2 (en) | 2023-07-05 |
US12017326B2 (en) | 2024-06-25 |
JP2020142831A (en) | 2020-09-10 |
CN111660207A (en) | 2020-09-15 |
CN111660207B (en) | 2023-08-04 |
KR20200107870A (en) | 2020-09-16 |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
US12017326B2 (en) | Powder contact member and method for surface treatment of powder contact member | |
CN109070289B (en) | Cutting edge structure of machining tool and surface treatment method thereof | |
US9156131B2 (en) | Method of treating surface of mold | |
JP5148183B2 (en) | Blasting abrasive and blasting method using the abrasive | |
US20080233838A1 (en) | Substrate treatment method for portion to be coated | |
JP2005001088A (en) | Member coated with hard coating film and its manufacturing method | |
Chen et al. | Influence of agglomerated diamond abrasive wear on sapphire material removal behavior | |
CN110387213B (en) | Method for manufacturing soft elastic abrasive, cutting tool and method for processing die | |
WO2017026057A1 (en) | Surface treatment method for transparent resin forming mold, transparent resin forming mold, and transparent resin formed article | |
CN109154057B (en) | Surface treatment method for metal product and metal product | |
JP6496103B2 (en) | Polishing body for barrel polishing | |
US11618127B2 (en) | Method for surface treatment of DLC coated member | |
KR20160146489A (en) | Apparatus and method for imparting selected topographies to aluminum sheet metal and applications there for | |
EP3520964B1 (en) | Surface treatment method for metallic three-dimensional products | |
JP6784379B1 (en) | Evaluation method of surface shape of powder contact member | |
JP6783500B2 (en) | Surface treatment method for sliding members and sliding members | |
Meijer et al. | Preparation of asymmetrical cutting edge geometries on micro end mills using pressurized wet abrasive jet machining for hard micromachining of AISI M3: 2 |
Legal Events
Date | Code | Title | Description |
---|---|---|---|
AS | Assignment |
Owner name: FUJI MANUFACTURING CO., LTD., JAPAN Free format text: ASSIGNMENT OF ASSIGNORS INTEREST;ASSIGNORS:MASE, KEIJI;ISHIBASHI, SHOZO;KONDO, YUSUKE;REEL/FRAME:051346/0408 Effective date: 20191209 |
|
STPP | Information on status: patent application and granting procedure in general |
Free format text: APPLICATION DISPATCHED FROM PREEXAM, NOT YET DOCKETED |
|
STPP | Information on status: patent application and granting procedure in general |
Free format text: DOCKETED NEW CASE - READY FOR EXAMINATION |
|
STPP | Information on status: patent application and granting procedure in general |
Free format text: NON FINAL ACTION MAILED |
|
STPP | Information on status: patent application and granting procedure in general |
Free format text: RESPONSE TO NON-FINAL OFFICE ACTION ENTERED AND FORWARDED TO EXAMINER |
|
STPP | Information on status: patent application and granting procedure in general |
Free format text: NON FINAL ACTION MAILED |
|
STCB | Information on status: application discontinuation |
Free format text: ABANDONED -- FAILURE TO RESPOND TO AN OFFICE ACTION |