WO2022185754A1 - 圧粉体搬送機構および圧粉体成形装置 - Google Patents
圧粉体搬送機構および圧粉体成形装置 Download PDFInfo
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- WO2022185754A1 WO2022185754A1 PCT/JP2022/001548 JP2022001548W WO2022185754A1 WO 2022185754 A1 WO2022185754 A1 WO 2022185754A1 JP 2022001548 W JP2022001548 W JP 2022001548W WO 2022185754 A1 WO2022185754 A1 WO 2022185754A1
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- green compact
- buckling
- conveying
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- conveying path
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Classifications
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- 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
- B22F3/00—Manufacture of workpieces or articles from metallic powder characterised by the manner of compacting or sintering; Apparatus specially adapted therefor ; Presses and furnaces
- B22F3/18—Manufacture of workpieces or articles from metallic powder characterised by the manner of compacting or sintering; Apparatus specially adapted therefor ; Presses and furnaces by using pressure rollers
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B30—PRESSES
- B30B—PRESSES IN GENERAL
- B30B11/00—Presses specially adapted for forming shaped articles from material in particulate or plastic state, e.g. briquetting presses, tabletting presses
- B30B11/18—Presses specially adapted for forming shaped articles from material in particulate or plastic state, e.g. briquetting presses, tabletting presses using profiled rollers
-
- 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
- B22F3/00—Manufacture of workpieces or articles from metallic powder characterised by the manner of compacting or sintering; Apparatus specially adapted therefor ; Presses and furnaces
- B22F3/003—Apparatus, e.g. furnaces
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B30—PRESSES
- B30B—PRESSES IN GENERAL
- B30B11/00—Presses specially adapted for forming shaped articles from material in particulate or plastic state, e.g. briquetting presses, tabletting presses
- B30B11/005—Control arrangements
- B30B11/006—Control arrangements for roller presses
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B30—PRESSES
- B30B—PRESSES IN GENERAL
- B30B15/00—Details of, or accessories for, presses; Auxiliary measures in connection with pressing
- B30B15/30—Feeding material to presses
- B30B15/302—Feeding material in particulate or plastic state to moulding presses
- B30B15/308—Feeding material in particulate or plastic state to moulding presses in a continuous manner, e.g. for roller presses, screw extrusion presses
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B30—PRESSES
- B30B—PRESSES IN GENERAL
- B30B15/00—Details of, or accessories for, presses; Auxiliary measures in connection with pressing
- B30B15/34—Heating or cooling presses or parts thereof
-
- 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
- B22F3/00—Manufacture of workpieces or articles from metallic powder characterised by the manner of compacting or sintering; Apparatus specially adapted therefor ; Presses and furnaces
- B22F3/18—Manufacture of workpieces or articles from metallic powder characterised by the manner of compacting or sintering; Apparatus specially adapted therefor ; Presses and furnaces by using pressure rollers
- B22F2003/185—Manufacture of workpieces or articles from metallic powder characterised by the manner of compacting or sintering; Apparatus specially adapted therefor ; Presses and furnaces by using pressure rollers by hot rolling, below sintering temperature
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B30—PRESSES
- B30B—PRESSES IN GENERAL
- B30B3/00—Presses characterised by the use of rotary pressing members, e.g. rollers, rings, discs
- B30B3/04—Presses characterised by the use of rotary pressing members, e.g. rollers, rings, discs co-operating with one another, e.g. with co-operating cones
Definitions
- the present disclosure relates to a green compact conveying mechanism and a green compact forming apparatus.
- Patent Document 1 raw material powder is passed through a pressure roll to form a plate, and the formed green compact is conveyed to a heating and compression unit by a conveyor, and the green compact is heated and pressed by the heating and compression unit.
- a powder sintering apparatus for producing a sintered body is disclosed.
- Conveyors which are common as an article transport mechanism, are complicated in structure and relatively expensive because the conveyor itself is equipped with a drive system. As a result, the structure of the powder sintering apparatus equipped with the conveyor becomes complicated and the cost increases. On the other hand, if the extrusion force of the pressure roll is used for conveying the green compact, the structure of the conveying mechanism and the apparatus on which the conveying mechanism is mounted can be simplified and the cost can be reduced.
- the green compact when the green compact is conveyed by the extrusion force of the pressure roll, if the conveyance path is clogged, the green compact may bend, eventually leading to buckling.
- buckling occurs in the powder compact, it becomes difficult to evenly transmit the pushing force of the pressure roll to the downstream side from the buckling portion. As a result, the transportation of the green compact is stagnated.
- the present disclosure has been made in view of this situation, and its purpose is to provide a technique for improving the operation rate of the transport mechanism.
- a certain aspect of the present disclosure is a green compact conveying mechanism.
- This mechanism is arranged in a conveying path for a green compact obtained by compressing the powder into a sheet, an extruding unit for sending the green compact to the downstream side of the conveying path by extruding the green compact, and in the conveying path, A buckling inducing part that locally makes the green compact easily bendable and induces buckling at the location is provided.
- Another aspect of the present disclosure is a green compact molding apparatus.
- This apparatus includes a press roll for compression-molding powder into a sheet, and the green compact conveying mechanism of the above aspect, and the press roll also serves as an extrusion section of the green compact conveying mechanism.
- FIG. 1(A) is a perspective view schematically showing a green compact molding apparatus according to an embodiment.
- FIG. 1B is a cross-sectional view of the transport path.
- 2(A) to 2(C) are schematic diagrams showing the state of the green compact in the conveying path.
- 3(A) to 3(D) are schematic diagrams for explaining the restoration work of conveying the green compact.
- FIGS. 4A to 4C are schematic diagrams for explaining the configuration and operation of the green compact transport mechanism.
- FIG. 5A is a schematic diagram for explaining the configuration of the green compact transport mechanism according to Modification 1.
- FIG. FIG. 5B is a schematic diagram for explaining the configuration of the green compact transport mechanism according to Modification 2. As shown in FIG.
- FIG. 1(A) is a perspective view schematically showing a green compact molding apparatus 1 according to an embodiment.
- FIG. 1B is a cross-sectional view of the transport path 18.
- the green compact molding apparatus 1 includes a hopper 2 , a feeder 4 , a press roll 6 , a green compact conveying mechanism 8 , a preheating furnace 10 and hot press rolls 12 .
- the hopper 2 stores the powder 16 that is the raw material of the green compact 14 .
- the material of the powder 16 is, for example, an aggregate of particles with a particle size smaller than 100 ⁇ m, and the particle size distribution is not particularly limited.
- the powder 16 is supplied from the hopper 2 to the feeder 4.
- the feeder 4 can be composed of a known screw feeder or the like.
- Feeder 4 supplies powder 16 to press roll 6 .
- the press roll 6 of the present embodiment is composed of a pair of rolls arranged at a predetermined interval. By passing the powder 16 between the pair of rolls, the powder 16 is compression-molded into a sheet. As a result, a sheet-like green compact 14 is obtained.
- the green compact 14 is imparted with strength that does not substantially collapse even when transported.
- the green compact 14 is continuously fed from the press roll 6 to the conveying path 18 . Therefore, the green compact 14 has a strip shape elongated in the conveying direction A. As shown in FIG.
- the conveying path 18 of the present embodiment has a tunnel shape extending in the conveying direction A of the green compact 14 and guides the progress of the green compact 14 .
- the transport path 18 extends horizontally.
- the transport path 18 has a floor surface 20, a pair of side surfaces 22 and a ceiling surface 24.
- the powder compact 14 slides in the conveying direction A on the floor surface 20 .
- the pair of side surfaces 22 are arranged in the width direction B of the green compact 14 perpendicular to the conveying direction A.
- the ceiling surface 24 faces the floor surface 20 in a vertical direction C orthogonal to the transport direction A and the width direction B.
- a passage for the green compact 14 is formed by the floor surface 20 , the pair of side surfaces 22 and the ceiling surface 24 .
- the interval between the pair of side surfaces 22 is set slightly larger than the dimension in the width direction B of the green compact 14 so that the green compact 14 can smoothly move through the passage.
- the space between the floor surface 20 and the ceiling surface 24 is set slightly larger than the vertical dimension C of the green compact 14 . Therefore, a gap is formed between the powder compact 14 and the ceiling surface 24 .
- the conveying path 18 constitutes the green compact conveying mechanism 8 .
- the green compact transport mechanism 8 includes an extrusion section 26 in addition to the transport path 18 .
- the pushing section 26 pushes the green compact 14 in the conveying direction A, thereby sending the green compact 14 to the downstream side of the conveying path 18 .
- the press roll 6 also serves as the extrusion section 26 of the green compact conveying mechanism 8 .
- the extrusion part 26 may be provided separately from the press roll 6 .
- the structure of the green compact transport mechanism 8 will be described later in detail.
- the green compact 14 reaches the preheating furnace 10 through the conveying path 18 .
- the preheating furnace 10 heats the green compact 14 to a predetermined temperature, for example, about 400° C. or higher and 800° C. or lower, before the hot press roll 12 heats and compresses the green compact 14 .
- the preheating furnace 10 can be configured with a known heater or the like.
- the green compact 14 heated in the preheating furnace 10 is supplied to the hot press rolls 12 .
- the hot press roll 12 as an example is composed of a pair of rolls arranged with a predetermined interval in the vertical direction C. As shown in FIG. Each roll incorporates a heater, and the surface is heated to a predetermined temperature, for example, about 400° C. or higher and 800° C. or lower.
- the powder compact 14 is heated and pressurized by passing between a pair of rolls to become a sintered compact.
- FIG. 1 is schematic diagrams showing the state of the green compact 14 in the conveying path 18.
- FIG. When the green compact 14 is disturbed in its transportation, as shown in FIG. A reaction force F2 in the opposite direction to F1 is applied. An example of a transport failure is clogging of the transport path 18 caused by accumulation of part of the powder 16 dropped from the green compact 14 .
- the hot press roll 12 is stopped. Another factor is the difference in rotation speed between the press roll 6 and the hot press roll 12, in other words, the difference in the conveying speed of the green compact 14.
- FIG. Further, when the green compact 14 is spread by the hot press rolls 12, a part of the green compact 14 extends toward the upstream side.
- the green compact 14 When the green compact 14 is subjected to the extrusion force F1 and the reaction force F2, a portion of the green compact 14 is deformed so as to escape into the gap with the ceiling surface 24, forming a bent portion 28.
- the green compact 14 tends to be deformed starting from a portion having a lower density or a thinner thickness than its surroundings, and a bent portion 28 is formed.
- the pushing force F1 is transmitted to the downstream side of the flexible portion 28 substantially evenly. Therefore, at the stage where the bending portion 28 is formed, the green compact 14 can be continued to be conveyed. Therefore, when the transport obstacle is resolved and the reaction force F2 disappears, or when the reaction force F2 is small relative to the rigidity of the green compact 14, as shown in FIG. Conveyance of the green compact 14 can be continued without doing so.
- the flexible portion 28 grows and buckles as shown in FIG. 2(C).
- the green compact 14 breaks and collapses at the flexed portion. If a plurality of flexures 28 are formed, typically the flexure 28 with the greatest amount of deflection will buckle.
- the buckling portion 30 is formed in the powder compact 14 , it becomes difficult for the pushing force F ⁇ b>1 to be evenly transmitted to the downstream side of the buckling portion 30 . As a result, the transportation of the green compact 14 is stagnated. Therefore, it is necessary to remove the buckling portion 30 to restore the conveyance of the green compact 14 .
- FIGS. 3(A) to 3(D) are schematic diagrams for explaining the restoration work of conveying the green compact 14.
- FIG. 3A When the buckling portion 30 is formed in the green compact 14 as shown in FIG. 3A, the buckling portion 30 is cut off as shown in FIG. be done. At this time, a portion on the upstream side of the buckling portion and a portion on the downstream side of the buckling portion are also removed as the buckling portion 30 .
- An end face 32a of the upstream portion 32 located upstream from the buckling portion 30 and an end face 34a of the downstream portion 34 located downstream from the buckling portion 30 are arranged to be parallel to each other. Preferably, the end face 32a and the end face 34a are arranged so as to be perpendicular to the conveying direction A.
- the user manually performed the recovery work described above. That is, the user stops the pushing portion 26, disassembles the conveying path 18 to expose the inside, specifies the position of the buckling portion 30, cuts off the buckling portion 30 manually, and drives the pushing portion 26. was restarted. For this reason, the restoration work is very complicated, has a large work load, and takes a long time.
- FIGS. 4A to 4C are schematic diagrams for explaining the configuration and operation of the green compact transport mechanism 8.
- FIG. 4A the green compact transport mechanism 8 according to the present embodiment includes a buckling induction portion 36. As shown in FIG. 4A, the green compact transport mechanism 8 according to the present embodiment includes a buckling induction portion 36. As shown in FIG. 4A, the green compact transport mechanism 8 according to the present embodiment includes a buckling induction portion 36. As shown in FIG.
- the buckling-inducing part 36 is arranged in the conveying path 18 and locally makes the green compact 14 easier to bend to induce buckling in the relevant part.
- the buckling induction portion 36 can be provided at any position downstream of the extrusion portion 26 (see FIG. 1).
- the buckling-inducing portion 36 of the present embodiment is configured by a locally raised portion of the ceiling surface 24 of the tunnel of the transport path 18 . That is, the concave portion provided in the ceiling surface 24 constitutes the buckling induction portion 36 .
- the pressing force F1 and the reaction force F2 are input to the green compact 14, deformation leading to the bending portion 28 may start to occur at multiple locations of the green compact 14.
- the deformation of these green compacts 14 is at least temporarily suppressed by the ceiling surface 24 .
- the ceiling surface 24 is locally elevated at the buckling-inducing portion 36 . Therefore, the powder compact 14 continues to deform at the locations where the buckling-inducing portions 36 are installed, even while the deformation is suppressed by the ceiling surface 24 at locations other than the locations where the buckling-inducing portions 36 are installed.
- the bent portion 28 can be intentionally formed at the installation location of the buckling inducing portion 36 .
- the flexible portion 28 grows further and ends in buckling. That is, buckling is induced by the buckling inducing portion 36 .
- the difference in flexibility caused by whether or not the ceiling surface 24 is pressed is much larger than the difference in flexibility caused by the physical properties (density and thickness) of the green compact 14 . Therefore, by raising a portion of the ceiling surface 24 and using it as the buckling inducing portion 36, the buckling inducing portion 36 can induce buckling at a high frequency. As a result, it is possible to limit the locations where the buckling portions 30 are to be formed, thereby reducing the burden and shortening the time required for the restoration work.
- the buckling inducing portion 36 of the present embodiment has a tapered portion 38 whose height decreases toward the downstream side of the conveying path 18 .
- the tapered portion 38 is provided at the boundary between the buckling inducing portion 36 and the downstream portion thereof, and is inclined so that the height becomes lower toward the downstream side. If the bending portion 28 does not buckle due to the disappearance of the reaction force F2 or the like, the bending portion 28 is transported downstream of the buckling induction portion 36 . At this time, the bent portion 28 abuts against the tapered portion 38, and the top portion thereof is gradually pressed down as it advances toward the downstream side. As a result, it is possible to prevent the powder 16 from dropping off due to the bending portion 28 being scraped by the steps of the ceiling surface 24 .
- the green compact transport mechanism 8 of the present embodiment includes a sensor 40 and a removing section 42 .
- a sensor 40 detects the occurrence of buckling in the buckling inducing portion 36 .
- the sensor 40 is not particularly limited as long as it can detect the formation of the buckling portion 30.
- it can be composed of a known pressure sensor such as a piezoelectric sensor or a strain sensor.
- the sensor 40 is installed in a region corresponding to the buckling induction portion 36 on the outer surface of the transport path 18 . Then, the pressure when the buckling portion 30 presses the buckling inducing portion 36 is detected.
- the sensor 40 may be installed inside the transport path 18 . In this case, for example, the pressure when the buckling portion 30 directly presses the sensor 40 is detected.
- the sensor 40 sends a signal indicating the detection result to the remover 42 .
- the removal section 42 removes the buckling section 30 according to the detection result of the sensor 40 .
- the removing section 42 of the present embodiment has a cutting section 44 , a recovering section 46 and a control section 48 .
- Cuts 44 separate buckling portion 30 from other adjacent portions (ie, upstream portion 32 and downstream portion 34).
- the cutting portion 44 as an example is composed of a pair of cutting blades that can move forward and backward with respect to the buckling inducing portion 36 .
- the pair of cutting blades are arranged side by side in the conveying direction A so as to sandwich the buckling-inducing portion 36 .
- the recovering part 46 recovers the buckling part 30 separated by the cutting part 44 .
- the recovery section 46 as an example has a structure in which the floor surface 20 facing the buckling induction section 36 slides. That is, the floor surface 20 facing the buckling inducing portion 36 is an openable floor. By sliding the floor surface 20, a recovery hole 46a connecting the inside and outside of the transport path 18 is formed. Then, the buckling portion 30 is recovered by dropping the buckling portion 30 from the recovery hole 46a.
- the floor surface 20 may open and close the recovery hole 46a by rotating about a hinge as a fulcrum. That is, the recovery hole 46a may be provided with a slide door or a hinge door.
- the driving of the cutting section 44 and the recovery section 46 is controlled by the control section 48 .
- the controller 48 controls the advancing and retreating of the cutting blade and the sliding of the floor surface 20 .
- the control unit 48 is realized by elements and circuits such as a CPU and a memory of a computer as a hardware configuration, and is realized by a computer program etc. as a software configuration. Those skilled in the art will of course understand that the control unit 48 can be implemented in various forms using a combination of hardware and software.
- the control section 48 can receive a signal from the sensor 40 and grasp the occurrence of the buckling portion 30 .
- the recovery section 46 is slid to make the recovery hole 46a appear as shown in FIG. 4(B).
- the cut portion 44 is advanced toward the buckling induction portion 36 from the recovery hole 46a.
- the boundary between the buckling portion 30 and the upstream portion 32 and the boundary between the buckling portion 30 and the downstream portion 34 are cut, and the buckling portion 30 is separated.
- the separated buckling portion 30 drops from the recovery hole 46a and is recovered.
- the control section 48 retracts the cutting section 44 from the buckling inducing section 36 and slides the recovery section 46 to close the recovery hole 46a.
- the transportation of the green compact 14 can be restarted.
- the extruded portion 26 is stopped when the buckling portion 30 is formed, and is restarted when the removal of the buckling portion 30 is completed.
- the control of the pushing section 26 may be performed by the control section 48 or may be performed by another control section.
- the recovery section 46 may include a mechanism for sucking the separated buckling section 30 together with the opening/closing door or instead of the opening/closing door.
- a plurality of buckling induction portions 36 may be provided.
- the green compact conveying mechanism 8 includes a conveying path 18 for the green compact 14 in which the powder 16 is compression-molded into a sheet shape, and a compacting mechanism for extruding the green compact 14 .
- a pushing section 26 that sends the powder 14 to the downstream side of the conveying path 18, and a buckling inducing section 36 that is arranged in the conveying path 18 and locally makes the green compact 14 easier to bend to induce buckling at the relevant location.
- the buckling induction portion 36 By providing the buckling induction portion 36 in this way, the reaction force F2 is input to the green compact 14 during transportation, and when the reaction force F2 exceeds the rigidity of the green compact 14, the green compact 14 A buckling portion 30 can be formed at a fixed location.
- the operating rate of the green compact transport mechanism 8 can be improved.
- the throughput of the green compact molding apparatus 1 equipped with the green compact transport mechanism 8 can be improved.
- the conveying path 18 of the present embodiment has a tunnel shape extending in the conveying direction A of the green compact 14 . This makes it easier to maintain the shape of the green compact 14 while it is being transported.
- the buckling-inducing portion 36 is configured by a portion where the ceiling surface 24 of the transport path 18 is locally raised. This makes it possible to induce buckling with a simple structure.
- the buckling-inducing portion 36 has a tapered portion 38 whose height decreases toward the downstream side of the conveying path 18 .
- the buckling-inducing portion 36 moves downstream without buckling, the height of the flexible portion 28 can be gradually lowered to enter the downstream side. Therefore, it is possible to prevent the powder 16 from falling off due to the tip of the flexible portion 28 being scraped off. As a result, clogging of the transport path 18 can be suppressed.
- the green compact transport mechanism 8 of the present embodiment includes a sensor 40 that detects the occurrence of buckling in the buckling induction portion 36 and a removal portion 42 that removes the buckling portion 30 according to the detection result of the sensor 40. and Further, the removing portion 42 has a cutting portion 44 for separating the buckling portion 30 from other portions, and a recovering portion 46 for recovering the separated buckling portion 30 .
- the work of removing the buckling portion 30 can be automated. Therefore, it is possible to further reduce the burden on the restoration work of conveying the green compact 14 and shorten the work time. As a result, the operating rate of the green compact transport mechanism 8 can be further improved.
- FIG. 5A is a schematic diagram for explaining the configuration of the green compact transport mechanism 8 according to Modification 1.
- the green compact conveying mechanism 8 of this modified example has a buckling inducing portion 36 formed by a locally opened portion of the ceiling surface 24 of the conveying path 18 . That is, the through-holes provided in the ceiling surface 24 constitute the buckling-inducing portion 36 .
- This modification can also induce buckling at a fixed position. Therefore, the same effects as those of the embodiment can be obtained.
- the tapered portion 38 can also be provided in this modified example.
- FIG. 5B is a schematic diagram for explaining the configuration of the green compact transport mechanism 8 according to Modification 2.
- the green compact conveying mechanism 8 of this modified example has a buckling inducing portion 36 that is configured by a portion of the ceiling surface 24 of the conveying path 18 where the flexibility is locally increased. That is, the ceiling surface 24 has the low flexibility portion 50 and the high flexibility portion 52 having higher flexibility than the low flexibility portion 50 .
- the highly flexible portion 52 constitutes the buckling inducing portion 36 .
- the low flexibility portion 50 can be made of, for example, metal such as stainless steel or aluminum alloy, or ceramic material such as silicon nitride, alumina, or zirconia.
- the highly flexible portion 52 can be made of, for example, general-purpose plastics such as polyethylene (PE) or acrylonitrile-butadiene-styrene copolymer (ABS), or engineering plastics such as polyacetal (POM) or polycarbonate (PC). .
- PE polyethylene
- ABS acrylonitrile-butadiene-styrene copolymer
- PC polycarbonate
- This modification can also induce buckling at a fixed position. Therefore, the same effects as those of the embodiment can be obtained.
- the tapered portion 38 can also be provided in this modified example.
- Embodiments may be specified by items described below.
- a green compact transport mechanism (8) a conveying path (18) for a green compact (14) in which the powder (16) is compression-molded into a sheet
- an extrusion section (26) for sending the green compact (14) to the downstream side of the conveying path (18) by pushing the green compact (14)
- a buckling inducing part (36) arranged in the conveying path (18) and locally flexing the powder compact (14) to induce buckling at the relevant location
- a green compact transport mechanism (8) a green compact transport mechanism
- the conveying path (18) has a tunnel shape extending in the conveying direction (A) of the green compact (14),
- the buckling-inducing portion (36) is composed of a locally raised portion of the ceiling surface (24) of the conveying path (18), 2.
- the buckling-inducing portion (36) has a tapered portion (38) whose height decreases toward the downstream side of the conveying path (18), 2.
- the conveying path (18) has a tunnel shape extending in the conveying direction (A) of the green compact (14),
- the buckling-inducing portion (36) is composed of a locally opened portion of the ceiling surface (24) of the conveying path (18), 2.
- the conveying path (18) has a tunnel shape extending in the conveying direction (A) of the green compact (14),
- the buckling-inducing part (36) is composed of a locally increased flexibility of the ceiling surface (24) of the transport path (18), 2.
- the removing part (42) has a cutting part (44) that separates the buckling part (30) from other parts, and a recovering part (46) that recovers the separated buckling part (30), 7.
- the present disclosure can be used for a green compact conveying mechanism and a green compact forming apparatus.
- compaction molding device 6 press roll, 8 compaction conveying mechanism, 14 compact, 16 powder, 18 conveying path, 24 ceiling surface, 26 extruding section, 30 buckling section, 36 buckling inducing section, 38 taper portion, 40 sensor, 42 removal portion, 44 cutting portion, 46 recovery portion.
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Abstract
Description
図5(A)は、変形例1に係る圧粉体搬送機構8の構成を説明するための模式図である。本変形例の圧粉体搬送機構8は、搬送路18の天井面24が局所的に開放された部分で構成される座屈誘発部36を有する。つまり、天井面24に設けられた貫通孔が座屈誘発部36を構成している。本変形例によっても、決まった位置に座屈を誘発することができる。よって、実施の形態と同様の効果を奏することができる。なお、本変形例でもテーパ部38を設けることができる。
図5(B)は、変形例2に係る圧粉体搬送機構8の構成を説明するための模式図である。本変形例の圧粉体搬送機構8は、搬送路18の天井面24の可撓性が局所的に高くなった部分で構成される座屈誘発部36を有する。つまり、天井面24は、低可撓性部50と、低可撓性部50よりも可撓性の高い高可撓性部52とを有する。そして、高可撓性部52が座屈誘発部36を構成している。低可撓性部50は、例えばステンレス鋼やアルミニウム合金といった金属、または窒化ケイ素、アルミナ、ジルコニア等のセラミックス材料等で構成することができる。高可撓性部52は、例えば汎用プラスチックであるポリエチレン(PE)やアクリロニトリルブタジエンスチレン共重合体(ABS)、エンジニアリングプラスチックであるポリアセタール(POM)やポリカーボネート(PC)といった樹脂等で構成することができる。本変形例によっても、決まった位置に座屈を誘発することができる。よって、実施の形態と同様の効果を奏することができる。なお、本変形例でもテーパ部38を設けることができる。
[項目1]
粉体(16)がシート状に圧縮成形された圧粉体(14)の搬送路(18)と、
圧粉体(14)を押し出すことで圧粉体(14)を搬送路(18)の下流側に送る押出部(26)と、
搬送路(18)に配置され、圧粉体(14)を局所的に撓みやすくして当該箇所に座屈を誘発する座屈誘発部(36)と、を備える、
圧粉体搬送機構(8)。
[項目2]
搬送路(18)は、圧粉体(14)の搬送方向(A)に延びるトンネル状であり、
座屈誘発部(36)は、搬送路(18)の天井面(24)が局所的に高くなった部分で構成される、
項目1に記載の圧粉体搬送機構(8)。
[項目3]
座屈誘発部(36)は、搬送路(18)の下流側に向かうほど高さが低くなるテーパ部(38)を有する、
項目2に記載の圧粉体搬送機構(8)。
[項目4]
搬送路(18)は、圧粉体(14)の搬送方向(A)に延びるトンネル状であり、
座屈誘発部(36)は、搬送路(18)の天井面(24)が局所的に開放された部分で構成される、
項目1に記載の圧粉体搬送機構(8)。
[項目5]
搬送路(18)は、圧粉体(14)の搬送方向(A)に延びるトンネル状であり、
座屈誘発部(36)は、搬送路(18)の天井面(24)の可撓性が局所的に高くなった部分で構成される、
項目1に記載の圧粉体搬送機構(8)。
[項目6]
座屈誘発部(36)における座屈の発生を検知するセンサ(40)と、
センサ(40)の検知結果に応じて座屈部(30)を除去する除去部(42)と、
を備える、
項目1乃至5のいずれかに記載の圧粉体搬送機構(8)。
[項目7]
除去部(42)は、座屈部(30)を他の部分から切り離す切断部(44)と、切り離された座屈部(30)を回収する回収部(46)と、を有する、
項目6に記載の圧粉体搬送機構(8)。
[項目8]
粉体(16)をシート状に圧縮成形するプレスロール(6)と、
項目1乃至8のいずれかに記載の圧粉体搬送機構(8)と、を備え、
プレスロール(6)が圧粉体搬送機構(8)の押出部(26)を兼ねる、
圧粉体成形装置(1)。
Claims (8)
- 粉体がシート状に圧縮成形された圧粉体の搬送路と、
前記圧粉体を押し出すことで前記圧粉体を前記搬送路の下流側に送る押出部と、
前記搬送路に配置され、前記圧粉体を局所的に撓みやすくして当該箇所に座屈を誘発する座屈誘発部と、を備える、
圧粉体搬送機構。 - 前記搬送路は、前記圧粉体の搬送方向に延びるトンネル状であり、
前記座屈誘発部は、前記搬送路の天井面が局所的に高くなった部分で構成される、
請求項1に記載の圧粉体搬送機構。 - 前記座屈誘発部は、前記搬送路の下流側に向かうほど高さが低くなるテーパ部を有する、
請求項2に記載の圧粉体搬送機構。 - 前記搬送路は、前記圧粉体の搬送方向に延びるトンネル状であり、
前記座屈誘発部は、前記搬送路の天井面が局所的に開放された部分で構成される、
請求項1に記載の圧粉体搬送機構。 - 前記搬送路は、前記圧粉体の搬送方向に延びるトンネル状であり、
前記座屈誘発部は、前記搬送路の天井面の可撓性が局所的に高くなった部分で構成される、
請求項1に記載の圧粉体搬送機構。 - 前記座屈誘発部における前記座屈の発生を検知するセンサと、
前記センサの検知結果に応じて座屈部を除去する除去部と、
を備える、
請求項1乃至5のいずれか1項に記載の圧粉体搬送機構。 - 前記除去部は、前記座屈部を他の部分から切り離す切断部と、切り離された前記座屈部を回収する回収部と、を有する、
請求項6に記載の圧粉体搬送機構。 - 粉体をシート状に圧縮成形するプレスロールと、
請求項1乃至7のいずれか1項に記載の圧粉体搬送機構と、を備え、
前記プレスロールが前記圧粉体搬送機構の前記押出部を兼ねる、
圧粉体成形装置。
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Citations (6)
Publication number | Priority date | Publication date | Assignee | Title |
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JPS62142099A (ja) * | 1985-12-16 | 1987-06-25 | Kobe Steel Ltd | 圧縮ロ−ル型造粒機のミスロ−ル検出装置 |
JP2018094586A (ja) * | 2016-12-12 | 2018-06-21 | パナソニックIpマネジメント株式会社 | ロールプレス装置 |
JP2019157227A (ja) | 2018-03-15 | 2019-09-19 | パナソニックIpマネジメント株式会社 | 粉体焼結方法と粉体焼結装置 |
JP2019181499A (ja) * | 2018-04-05 | 2019-10-24 | パナソニックIpマネジメント株式会社 | ロールプレス装置及び粉体成形体の製造方法 |
JP2020099928A (ja) * | 2018-12-21 | 2020-07-02 | パナソニックIpマネジメント株式会社 | ロールプレス装置 |
JP2022036617A (ja) * | 2020-08-24 | 2022-03-08 | パナソニックIpマネジメント株式会社 | 焼結体の製造装置 |
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Patent Citations (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS62142099A (ja) * | 1985-12-16 | 1987-06-25 | Kobe Steel Ltd | 圧縮ロ−ル型造粒機のミスロ−ル検出装置 |
JP2018094586A (ja) * | 2016-12-12 | 2018-06-21 | パナソニックIpマネジメント株式会社 | ロールプレス装置 |
JP2019157227A (ja) | 2018-03-15 | 2019-09-19 | パナソニックIpマネジメント株式会社 | 粉体焼結方法と粉体焼結装置 |
JP2019181499A (ja) * | 2018-04-05 | 2019-10-24 | パナソニックIpマネジメント株式会社 | ロールプレス装置及び粉体成形体の製造方法 |
JP2020099928A (ja) * | 2018-12-21 | 2020-07-02 | パナソニックIpマネジメント株式会社 | ロールプレス装置 |
JP2022036617A (ja) * | 2020-08-24 | 2022-03-08 | パナソニックIpマネジメント株式会社 | 焼結体の製造装置 |
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