WO2017099040A1 - 中子造型方法および中子造型装置 - Google Patents
中子造型方法および中子造型装置 Download PDFInfo
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- WO2017099040A1 WO2017099040A1 PCT/JP2016/086089 JP2016086089W WO2017099040A1 WO 2017099040 A1 WO2017099040 A1 WO 2017099040A1 JP 2016086089 W JP2016086089 W JP 2016086089W WO 2017099040 A1 WO2017099040 A1 WO 2017099040A1
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- core
- frame
- self
- core mold
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22C—FOUNDRY MOULDING
- B22C9/00—Moulds or cores; Moulding processes
- B22C9/10—Cores; Manufacture or installation of cores
Definitions
- the present invention relates to a core molding method for molding a complex-shaped core (sand mold) necessary for casting a product having a twisted shape, such as a male rotor and a female rotor of a screw compressor, using the core mold, and
- the present invention relates to a core molding apparatus.
- Patent Document 1 discloses a core molding method in which a core necessary for casting a near net-shaped casting is molded using a core mold. And in patent document 1, while rotating the core type
- Patent Document 1 has the following problems.
- the core mold when the core mold is placed in the frame along the vertical direction and the self-hardening sand is packed into the frame from the top, it is necessary to lay down the frame filled with the self-hardening sand sideways. Becomes worse.
- mold it is necessary to adjust the position of the fallen frame, and workability
- An object of the present invention is to provide a core molding method and a core molding apparatus capable of improving the workability and molding a core having a good shape.
- the core molding method according to the present invention is a core molding method in which a core having a twisted shape is molded by using the core mold, and after the core mold is arranged in the vertical direction in a frame that opens upward.
- a curing step in which self-hardening sand obtained by kneading sand, resin and curing agent is packed into the frame from above the frame and cured; and the core mold and the frame centering on the core axis And removing the core mold in the vertical direction from the core formed by hardening the self-hardening sand.
- the core molding apparatus is a core molding apparatus for molding a core having a twisted shape using a core mold, wherein the upper part is opened, and the core mold is arranged along the vertical direction inside.
- a self-hardening sand obtained by kneading sand, a resin, and a curing agent and packed inside from above, and the core mold and the frame around the core mold axis.
- a rotation driving device for removing the core mold in the vertical direction from the core formed by hardening the self-hardening sand.
- the core mold is arranged in the vertical direction in the frame, and self-hardening sand is packed into the frame from above the frame and cured. And a core type
- Core molding method In the core molding method according to the first embodiment of the present invention, for example, a complicated core (sand mold) required for casting a product having a twisted shape, such as a male rotor and a female rotor of a screw compressor, is used. This is a method of making using a child mold.
- This core molding method has a curing step and a die-cutting step.
- the curing process consists of placing a twisted wooden or metal core or resin core in the frame, then filling the frame with self-hardening sand, which is a mixture of sand, resin and curing agent, and curing. It is a process to make.
- the core mold is arranged along the vertical direction in a frame that opens upward. Then, the self-hardening sand is filled into the frame from above the frame and cured.
- Sand used for self-hardening sand is new sand or recycled sand having a polygonal shape or a spherical shape and a particle size of AFS 130 or less.
- the resin used for self-hardening sand as a binder is an acid curable furan resin containing furfuryl alcohol, and the amount of addition to the sand is 0.8%.
- curing agent used for self-hardening sand as a hardening catalyst is a hardening
- the addition amount with respect to furan resin is 40%.
- the kneading of the sand, the resin and the curing agent it is preferable to first knead the sand and the curing agent, and then add the resin and further knead.
- a general-purpose household mixer can be suitably used for kneading.
- Self-hardening sand is obtained by kneading the sand and the curing agent for 45 seconds with a home mixer, then adding the resin and kneading for another 45 seconds. This self-hardening sand is packed from above into a wooden or metal or resin frame in which the core mold is arranged in the vertical direction.
- the self-hardening sand is packed in the frame along the axial direction of the core while the self-hardening sand is vibrated.
- the self-hardening sand hardens and shrinks as time passes.
- the punching process is a process of pulling the core mold from the core formed by hardening the self-hardening sand while relatively rotating the core mold and the frame around the core mold axis. After a predetermined curing time has elapsed, the core mold and the frame are rotated relative to each other about the core mold axis, whereby the core mold is removed vertically from the core.
- the curing time is an elapsed time from the end of kneading of the sand, the resin and the curing agent.
- the core mold is fixed so as not to rotate, and the frame is rotated in the horizontal direction. Further, the frame is rotated in the horizontal direction while pulling the core mold upward with a tension higher than the load of the core mold.
- the screw-shaped core mold is pulled out from the core along the vertical direction. At this time, the core mold is pulled upward from the core by setting the rotation direction of the frame so that the core mold comes out upward.
- the core molding apparatus performs the above-described core molding method.
- FIG. 1 which is a side view
- the core molding apparatus 1 has a frame 2 made of wood, metal, or resin that is open at the top.
- the frame 2 is placed on the frame base 3.
- a screw-shaped core mold 4 is arranged along the vertical direction.
- the shaft 4 a of the core mold 4 is held by the shaft holder 5 so as not to rotate.
- the frame 2 is filled with self-hardening sand obtained by kneading sand, resin, and a curing agent from above.
- the frame base 3 is provided with a side plate 3 a that can advance and retract in the horizontal direction with respect to the frame 2 for each of the four side surfaces of the frame 2.
- the frame 2 is fixed on the frame 3 by bringing the side plates 3 a into contact with the four side surfaces of the frame 2 placed on the frame 3. At this time, the frame 2 is fixed on the frame base 3 so that the central axis of the frame 2 coincides with the central axis of the motor 7 described later.
- the shaft holder 5 that holds the shaft 4a of the core mold 4 is movable in the vertical direction along the rail 12 laid on the side surface of the gantry 11 along the vertical direction.
- the core molding device 1 has a rotation drive device 6 that relatively rotates the core die 4 and the frame 2 around the axis of the core die 4.
- the rotary drive device 6 includes a motor 7, a power source 8, and an inverter 9.
- the motor 7 is fixed to the gantry 11 via the motor fixture 10.
- the motor 7 is electrically connected to the power source 8 via the inverter 9.
- the rotational speed of the motor 7 is adjusted by the inverter 9.
- the core molding apparatus 1 has a tensioning device 13.
- the pulling device 13 pulls and winds the wire 14 connected to the shaft holder 5.
- the tensioning device 13 pulls the shaft holder 5 and thus the core mold 4 upward with a tension equal to or higher than the load of the core mold 4. More specifically, the tension device 13 pulls the shaft holder 5 upward with a tension equal to or greater than the total load of the core mold 4, the shaft holder 5, and the wire 14.
- the tension device 13 is a balancer.
- the motor 7 rotates the frame 3 in the horizontal direction.
- the frame 2 fixed on the frame base 3 rotates in the horizontal direction.
- the rotation direction of the frame 2 is set so that the core mold 4 comes out of the core 15 upward.
- FIG. 2 which is a side view of the frame 2
- the bottom plate 2a of the frame 2 is provided with a cylindrical recess 2b into which the cylindrical shaft 4a of the core mold 4 is fitted.
- the shaft 4a of the core mold 4 and the recess 2b of the bottom plate 2a constitute an adjustment mechanism that aligns the central axis of the core mold 4 with the central axis of the frame 2.
- the center axis of the core mold 4 and the center axis of the frame 2 are matched by fitting the shaft 4 a of the core mold 4 into the recess 2 b. Therefore, when the frame 2 is rotated in the horizontal direction, the central axis of the core mold 4, the central axis of the frame 2, and the central axis of the motor 7 coincide.
- FIG. 3 which is a side view of the frame 2
- a conical recess 2c is provided on the bottom plate 2a of the frame 2 and fitted. You may make it fit.
- the core mold 4 is disposed in the frame 2 along the vertical direction, and the shaft 4 a of the core mold 4 is held by the shaft holder 5.
- the center axis of the core mold 4 and the center axis of the frame 2 are made to coincide with each other by fitting the shaft 4a of the core mold 4 into the recess 2b.
- the central axis of the core mold 4 and the central axis of the motor 7 coincide with each other. Therefore, when the frame 2 is rotated by the motor 7, the frictional force generated between the core 15 and the core mold 4 is reduced. The coefficient of friction can be minimized. Thereby, since the core 15 can be rotated stably, the core 15 with little internal variation without internal damage can be formed.
- self-hardening sand is poured into the inside of the frame 2 from above the frame 2. Then, the self-hardening sand is packed in the frame 2 along the axial direction of the core mold 4 while vibrating the self-hardening sand by hitting each side surface of the frame 2 with a hammer.
- the frame 2 is rotated in the horizontal direction by rotating the frame base 3 in the horizontal direction with the motor 7.
- the frame 2 is rotated while pulling the shaft holder 5 upward with a tension higher than the load of the core mold 4 by the tension device 13.
- the screw-shaped core mold 4 comes out of the core 15 along the vertical direction.
- the rotation direction of the frame 2 is set so that the core mold 4 comes out upward. Therefore, the core mold 4 is pulled upward from the core 15.
- the shaft holder 5 moves upward along the rail 12, and the wire 14 is wound around the tension device 13.
- the core mold 4 stops above the core 15 while being suspended by the shaft holder 5.
- the core mold 4 is arranged in the frame 2 along the vertical direction, and self-hardening sand is packed into the frame 2 from above the frame 2 and cured. And the core type
- mold 4 is punched up and down from the core 15 formed by hardening self-hardening sand. Since the core mold 4 arranged along the vertical direction is removed in the vertical direction, there is no need to change the posture of the frame 2. Therefore, the axis of the motor 7 can be aligned with the core mold 4 in advance. Thereby, workability
- the self-hardening sand since self-hardening sand is packed in the frame 2 from the top of the frame 2, the self-hardening sand can be sufficiently filled in the valley portion of the core mold 4 having a twisted shape. Thereby, the core 15 having a good shape can be formed.
- the core mold 4 is removed from the core 15 in the vertical direction.
- the core mold 4 is rotated in the horizontal direction, since the core mold 4 moves in the vertical direction with respect to the core 15, it is necessary to move the motor that rotates the core mold 4 in the vertical direction.
- a moving mechanism and a space for retracting the motor are required, which complicates and enlarges the apparatus. Therefore, by rotating the frame 2 in the horizontal direction, the core mold 4 can be removed from the core 15 without moving the frame 2 in the vertical direction. This eliminates the need for a mechanism for moving the motor 7 and a space for retracting the motor 7, thereby simplifying and downsizing the apparatus.
- the core mold 4 is pulled upward from the core 15 while pulling the core mold 4 upward with a tension higher than the load of the core mold 4. As a result, the core mold 4 does not move downward during or after the core mold 4 is pulled out, so that the load of the core mold 4 acts on the core 15 and the core 15 is deformed in the axial direction. Can be prevented.
- the center axis of the core mold 4 is aligned with the center axis of the frame 2, so that the core mold 4 and the frame 2 are relatively rotated.
- the central axis of the core mold 4, the central axis of the frame 2, and the central axis of the motor 7 can be matched.
- the core molding device 201 has a weight 21 connected to the shaft 4a of the core mold 4 by a wire 22, and the tension by the weight 21 is the shaft 4a of the core mold 4.
- the structure which supports the wire 22 with the pulleys 23 and 24 so that it may act may be sufficient.
- the tension of the weight 21 is equal to or greater than the total load of the core mold 4 and the wire 22. Even with such a configuration, it is possible to prevent the core mold 4 from moving downward during or after the core mold 4 is pulled out.
- the core mold 4 is arranged in the vertical direction in the frame 2, and the frame 2 from above the frame 2. Fill with self-hardening sand and let it harden. And the core type
- mold 4 is punched up and down from the core 15 formed by hardening self-hardening sand. Since the core mold 4 arranged along the vertical direction is removed in the vertical direction, there is no need to change the posture of the frame 2. Therefore, the axis of the motor 7 can be aligned with the core mold 4 in advance. Thereby, workability
- the self-hardening sand since self-hardening sand is packed in the frame 2 from the top of the frame 2, the self-hardening sand can be sufficiently filled in the valley portion of the core mold 4 having a twisted shape. Thereby, the core 15 having a good shape can be formed.
- the core mold 4 is removed from the core 15 in the vertical direction.
- the core mold 4 is rotated in the horizontal direction, since the core mold 4 moves in the vertical direction with respect to the core 15, it is necessary to move the motor that rotates the core mold 4 in the vertical direction.
- a moving mechanism and a space for retracting the motor are required, which complicates and enlarges the apparatus. Therefore, by rotating the frame 2 in the horizontal direction, the core mold 4 can be removed from the core 15 without moving the frame 2 in the vertical direction. This eliminates the need for a mechanism for moving the motor 7 and a space for retracting the motor 7, thereby simplifying and downsizing the apparatus.
- the core mold 4 is pulled upward from the core 15 while pulling the core mold 4 upward with a tension higher than the load of the core mold 4. As a result, the core mold 4 does not move downward during or after the core mold 4 is pulled out, so that the load of the core mold 4 acts on the core 15 and the core 15 is deformed in the axial direction. Can be prevented.
- the center axis of the core mold 4 is aligned with the center axis of the frame 2, so that the core mold 4 and the frame 2 are relatively rotated.
- the central axis of the core mold 4, the central axis of the frame 2, and the central axis of the motor 7 can be matched.
- the core molding method of the present embodiment is different from the core molding method of the first embodiment in that, in the curing step, an amount of self-hardening sand overflowing from the frame is introduced into the frame and then the self-hardening sand overflowing from the frame. It is a point which flattens the upper end surface of self-hardening sand in a frame by removing.
- the upper end surface of the self-hardening sand in a frame is planarized by removing the self-hardening sand overflowing from the frame. Thereby, the upper end surface of the core can be formed with high accuracy.
- the removal of unnecessary self-hardening sand may be performed during the hardening of the self-hardening sand or after the hardening of the self-hardening sand as long as it is before the die-cutting process. If the upper end surface of the core is to be cured after the core mold has been removed, the locally thinned portion, such as around the hole after the core mold has been removed, is likely to be damaged. Therefore, the upper end surface of the self-hardening sand in the frame is flattened before removing the core mold. Further, it is preferable to flatten the upper end surface of the self-hardening sand in the frame after the self-hardening sand exhibits a certain strength so as not to be damaged by a slight external force.
- ⁇ Unnecessary self-hardening sand is removed with a removal device in which the lower end is in contact with the upper end surface of the core type arranged in the frame.
- the core molding apparatus performs the core molding method described above.
- the core molding device 301 has a removal device 31 as shown in FIG. 5 which is a side view. An amount of self-hardening sand overflowing from the frame 2 is introduced into the frame 2.
- the removal device 31 is attached to the shaft 4 a of the core mold 4.
- the removing device 31 can rotate around the shaft 4 a of the core mold 4.
- the removing device 31 is a cylindrical tube through which the shaft 4a of the core mold 4 is inserted. It has the member 31a and the spatula-shaped removal member 31b attached to the outer peripheral surface of the cylinder member 31a.
- the inner diameter of the cylindrical member 31 a is made larger than the outer diameter of the shaft 4 a of the core mold 4.
- the removing member 31b scrapes off the self-hardening sand overflowing from the frame 2 when the removing device 31 is rotated.
- Two removal members 31b are provided at intervals of 180 degrees in the circumferential direction of the cylindrical member 31a. The length of the removing member 31b is set such that the end of the removing member 31b is located inside the frame 2.
- the number of removing members 31b may be one.
- the number of removing members 31b may be provided in the circumferential direction of the cylindrical member 31a, for example, at intervals of 120 degrees. Of course, four or more may be provided.
- FIG. 9A which is a side view of FIG. 6A viewed from the direction A
- the thickness of the removal member 31b is uniform from the upper end to the lower end.
- the thickness of the removal member 31b may be reduced gradually from an upper end to a lower end.
- the removal member 31b may be inclined or curved at the lower end portion opposite to the rotation direction (arrow direction). May be. By doing in this way, the ability to scrape self-hardening sand can be improved.
- the removal device 31 is retracted above the frame 2 so as not to interfere with the charging when the self-hardening sand is charged. After the self-hardening sand is charged, the removal device 31 is disposed so that the lower end of the removal device 31 is in contact with the upper end surface of the core mold 4 as shown by a broken line in FIG. And when the removal apparatus 31 is rotated manually, the self-hardening sand overflowing from the frame 2 is scraped off by the removal member 31b.
- the removal device 31 may be configured to be detached from the shaft 4a of the core mold 4 when the self-hardening sand is charged and attached to the shaft 4a of the core mold 4 after the self-hardening sand is charged.
- the self-hardening sand in the frame 2 may be deficient due to a change in the bulk density of the self-hardening sand. Therefore, in this embodiment, an amount of self-hardening sand overflowing from the frame 2 is introduced into the frame 2.
- the upper end surface of the self-hardening sand in the frame 2 is flattened by removing the self-hardening sand overflowing from the frame 2 before removing the core mold 4. Thereby, the upper end surface of the core 15 can be accurately formed.
- the removal device 31 by rotating the removal device 31 around the shaft 4a of the core mold 4, the self-hardening sand overflowing from the frame 2 is scraped off by the removal member 31b of the removal device 31. Thereby, the upper end surface of the self-hardening sand in the frame 2 can be suitably flattened.
- the removal device 31 may have a brush 31c instead of the spatula-shaped removal member 31b.
- the brush 31c By scraping off the self-hardening sand overflowing from the frame 2 with a plurality of bristles of the brush 31c, the upper end surface of the self-hardening sand in the frame 2 can be suitably flattened. Moreover, if it is the brush 31c, the load to the self-hardening sand in the frame 2 can be reduced.
- the removing device 31 includes a disk-shaped plate member 31d, and a plurality of plate members 31d are provided.
- the notch part may be formed.
- the notch is bent from the plate member 31d so that the tip is positioned downward. Therefore, a hole is opened in the plate member 31d where the notch is formed.
- the self-hardening sand shaved off at the notch moves to the upper surface of the plate member 31d through the hole, and is manually removed from above the plate member 31d. Even if it is such a structure, the upper end surface of self-hardening sand in the frame 2 can be planarized suitably.
- the plate member 31d is not limited to a disk shape, and may be a fan shape.
- the amount of self-hardening sand overflowing from the frame 2 is poured into the frame 2 and then disposed in the frame 2.
- the upper end surface of the self-hardening sand in the frame 2 is flattened by removing the self-hardening sand overflowing from the frame 2 with the removing device 31 whose lower end is in contact with the upper end surface of the child mold 4.
- the self-hardening sand in the frame 2 may be deficient due to a change in the bulk density of the self-hardening sand.
- the self-hardening sand will not be insufficient, but when the self-hardening sand overflowing from the frame 2 is hardened as it is, the upper end surface of the core 15 does not become flat, and the core 15 is placed in the main mold. Shape error may occur. Therefore, the upper end surface of the self-hardening sand in the frame 2 is flattened by removing the self-hardening sand overflowing from the frame 2 before removing the core mold 4. Thereby, the upper end surface of the core 15 can be accurately formed.
- the removing device 31 by rotating the removing device 31 around the shaft 4a of the core mold 4, the self-hardening sand overflowing from the frame 2 is scraped off by the spatula-shaped removing member 31b of the removing device 31. Thereby, the upper end surface of the self-hardening sand in the frame 2 can be suitably flattened.
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Abstract
Description
(中子造型方法)
本発明の第1実施形態による中子造型方法は、例えば、スクリュ圧縮機の雄ロータや雌ロータのような、ねじれ形状を有する製品の鋳造に必要な複雑形状の中子(砂型)を、中子型を用いて造型する方法である。この中子造型方法は、硬化工程と、抜型工程と、を有している。
硬化工程は、ねじれ形状を有する木製または金属製、あるいは樹脂製の中子型を枠内に配置した後に、砂と樹脂と硬化剤とを混練してなる自硬性砂を枠内に詰めて硬化させる工程である。
抜型工程は、中子型の軸を中心に中子型と枠とを相対回転させながら、自硬性砂が硬化してなる中子から中子型を抜型する工程である。所定の硬化時間が経過した後に、中子型の軸を中心に中子型と枠とを相対回転させることで、中子から中子型を上下方向に抜型する。ここで、硬化時間は、砂と樹脂と硬化剤との混練終了からの経過時間である。
本発明の第1実施形態による中子造型装置は、上述した中子造型方法を行うものである。中子造型装置1は、側面図である図1に示すように、上方が開放した木製または金属製、あるいは樹脂製の枠2を有している。枠2は、枠台3上に載置される。枠2の内部には、スクリュ形状の中子型4が上下方向に沿って配置される。中子型4の軸4aは、軸保持具5により回転不能に保持される。枠2の内部には、砂と樹脂と硬化剤とを混練してなる自硬性砂が上から詰められる。
なお、引張装置13により、中子型4の荷重以上の張力で中子型4を上方向に引っ張る構成に限定されない。側面図である図4に示すように、中子造型装置201は、中子型4の軸4aにワイヤ22で接続された錘21を有し、錘21による張力が中子型4の軸4aに作用するように、滑車23,24でワイヤ22を支持する構成であってもよい。錘21の張力は、中子型4とワイヤ22との合計荷重と同等または同等以上である。このような構成であっても、中子型4の抜型中や抜型後に中子型4が下方向に移動しないようにすることができる。
以上に述べたように、本実施形態に係る中子造型方法および中子造型装置によると、枠2内に中子型4を上下方向に沿って配置しておき、枠2の上から枠2内に自硬性砂を詰めて硬化させる。そして、自硬性砂が硬化してなる中子15から中子型4を上下方向に抜型する。上下方向に沿って配置した中子型4を上下方向に抜型するので、枠2の姿勢を変える必要がない。よって、予め中子型4に対してモータ7の軸合わせをしておくことができる。これにより、作業性を向上させることができる。また、枠2の上から枠2内に自硬性砂を詰めるので、ねじれ形状を有する中子型4の谷部に自硬性砂を十分に充填することができる。これにより、形状の良好な中子15を造型することができる。
(中子造型方法)
次に、本発明の第2実施形態に係る中子造型方法について説明する。なお、上述した構成要素と同じ構成要素については、同じ参照番号を付してその説明を省略する。本実施形態の中子造型方法が第1実施形態の中子造型方法と異なる点は、硬化工程において、枠から溢れる量の自硬性砂を枠内に投入した後に、枠から溢れた自硬性砂を除去することで、枠内の自硬性砂の上端面を平坦化する点である。
自硬性砂を枠の上から枠内に詰めた場合、自硬性砂のかさ密度などの変化により、枠内の自硬性砂に不足が生じる場合がある。そこで、硬化工程では、枠から溢れる量の自硬性砂を枠内に投入する。これにより、自硬性砂が不足することはなくなるが、枠から溢れた自硬性砂がそのまま硬化すると、中子の上端面が平坦にならず、中子を主型に設置するときに形状誤差が生じる恐れがある。そこで、抜型工程を行う前に、枠から溢れた自硬性砂を除去することで、枠内の自硬性砂の上端面を平坦化する。これにより、中子の上端面を精度よく形成することができる。
第2実施形態による中子造型装置は、上述した中子造型方法を行うものである。中子造型装置301は、側面図である図5に示すように、除去装置31を有している。枠2内には、枠2から溢れる量の自硬性砂が投入される。
以上に述べたように、本実施形態に係る中子造型方法および中子造型装置によると、枠2から溢れる量の自硬性砂を枠2内に投入した後に、枠2内に配置された中子型4の上端面に下端が接する除去装置31で枠2から溢れた自硬性砂を除去することで、枠2内の自硬性砂の上端面を平坦化する。自硬性砂を枠2の上から枠2内に詰めた場合、自硬性砂のかさ密度などの変化により、枠2内の自硬性砂に不足が生じる場合がある。そこで、枠2から溢れる量の自硬性砂を枠2内に投入する。これにより、自硬性砂が不足することはなくなるが、枠2から溢れた自硬性砂がそのまま硬化すると、中子15の上端面が平坦にならず、中子15を主型に設置するときに形状誤差が生じる恐れがある。そこで、中子型4を抜型する前に、枠2から溢れた自硬性砂を除去することで、枠2内の自硬性砂の上端面を平坦化する。これにより、中子15の上端面を精度よく形成することができる。
2 枠
2a 底板
2b,2c 凹部
3 枠台
3a 側板
4 中子型
4a 軸
5 軸保持具
6 回転駆動装置
7 モータ
8 電源
9 インバータ
10 モータ固定具
11 架台
12 レール
13 引張装置
14 ワイヤ
15 中子
21 錘
22 ワイヤ
23,24 滑車
Claims (16)
- ねじれ形状を有する中子を中子型を用いて造型する中子造型方法において、
上方が開放する枠内に前記中子型を上下方向に沿って配置した後に、砂と樹脂と硬化剤とを混練してなる自硬性砂を前記枠の上から前記枠内に詰めて硬化させる硬化工程と、
前記中子型の軸を中心に前記中子型と前記枠とを相対回転させながら、前記自硬性砂が硬化してなる前記中子から前記中子型を前記上下方向に抜型する抜型工程と、
を有することを特徴とする中子造型方法。 - 前記抜型工程において、前記枠を水平方向に回転させることで、前記中子から前記中子型を前記上下方向に抜型することを特徴とする請求項1に記載の中子造型方法。
- 前記抜型工程において、前記中子型の荷重以上の張力で前記中子型を上方向に引っ張りながら、前記枠を水平方向に回転させることで、前記中子から前記中子型を前記上方向に抜型することを特徴とする請求項2に記載の中子造型方法。
- 前記硬化工程において、前記枠内に前記中子型を配置する際に、前記中子型の中心軸と前記枠の中心軸とを一致させることを特徴とする請求項1に記載の中子造型方法。
- 前記硬化工程において、前記枠内に前記中子型を配置する際に、前記中子型の中心軸と前記枠の中心軸とを一致させることを特徴とする請求項2に記載の中子造型方法。
- 前記硬化工程において、前記枠内に前記中子型を配置する際に、前記中子型の中心軸と前記枠の中心軸とを一致させることを特徴とする請求項3に記載の中子造型方法。
- 前記硬化工程において、前記枠から溢れる量の前記自硬性砂を前記枠内に投入した後に、前記枠内に配置された前記中子型の上端面に下端が接する除去装置で前記枠から溢れた前記自硬性砂を除去することで、前記枠内の前記自硬性砂の上端面を平坦化することを特徴とする請求項1~6のいずれか1項に記載の中子造型方法。
- 前記中子型の軸を中心に前記除去装置を回転させることで、前記除去装置が有するへら状の部材で前記枠から溢れた前記自硬性砂を削り取ることを特徴とする請求項7に記載の中子造型方法。
- ねじれ形状を有する中子を中子型を用いて造型する中子造型装置において、
上方が開放し、内部に前記中子型が上下方向に沿って配置されるとともに、砂と樹脂と硬化剤とを混練してなる自硬性砂が上から内部に詰められて硬化される枠と、
前記中子型の軸を中心に前記中子型と前記枠とを相対回転させることで、前記自硬性砂が硬化してなる前記中子から前記中子型を前記上下方向に抜型させる回転駆動装置と、
を有することを特徴とする中子造型装置。 - 前記回転駆動装置は、前記枠を水平方向に回転させることで、前記中子から前記中子型を前記上下方向に抜型させることを特徴とする請求項9に記載の中子造型装置。
- 前記中子型の荷重以上の張力で前記中子型を上方向に引っ張る引張装置をさらに有し、
前記回転駆動装置は、前記枠を水平方向に回転させることで、前記中子から前記中子型を前記上方向に抜型することを特徴とする請求項10に記載の中子造型装置。 - 前記中子型の中心軸と前記枠の中心軸とを一致させる調整機構をさらに有することを特徴とする請求項9に記載の中子造型装置。
- 前記中子型の中心軸と前記枠の中心軸とを一致させる調整機構をさらに有することを特徴とする請求項10に記載の中子造型装置。
- 前記中子型の中心軸と前記枠の中心軸とを一致させる調整機構をさらに有することを特徴とする請求項11に記載の中子造型装置。
- 前記枠内には、前記枠から溢れる量の前記自硬性砂が投入され、
前記枠内に配置された前記中子型の上端面に下端が接し、前記枠から溢れた前記自硬性砂を除去することで、前記枠内の前記自硬性砂の上端面を平坦化する除去装置をさらに有することを特徴とする請求項9~14のいずれか1項に記載の中子造型装置。 - 前記除去装置は、前記中子型の軸を中心に回転可能であり、
前記除去装置は、前記枠から溢れた前記自硬性砂を削り取るへら状の部材を有することを特徴とする請求項15に記載の中子造型装置。
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WO2008128451A1 (fr) * | 2007-04-19 | 2008-10-30 | Csr Meishan Rolling Stock Co. Ltd | Procédé de fabrication de noyau en une seule pièce pour traverse danseuse et châssis latéral de chariot |
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JPS52147518A (en) * | 1976-06-04 | 1977-12-08 | Ishikawajima Harima Heavy Ind | Production method of metal cylinder with spiral blades |
JP2008150872A (ja) * | 2006-12-18 | 2008-07-03 | Kokudo Sogo Kensetsu Kk | 深層混合処理装置および深層混合処理工法 |
WO2008128451A1 (fr) * | 2007-04-19 | 2008-10-30 | Csr Meishan Rolling Stock Co. Ltd | Procédé de fabrication de noyau en une seule pièce pour traverse danseuse et châssis latéral de chariot |
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