WO2012165181A1 - 中子造型機における中子砂充填装置及び中子砂充填方法 - Google Patents
中子造型機における中子砂充填装置及び中子砂充填方法 Download PDFInfo
- Publication number
- WO2012165181A1 WO2012165181A1 PCT/JP2012/062864 JP2012062864W WO2012165181A1 WO 2012165181 A1 WO2012165181 A1 WO 2012165181A1 JP 2012062864 W JP2012062864 W JP 2012062864W WO 2012165181 A1 WO2012165181 A1 WO 2012165181A1
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- WIPO (PCT)
- Prior art keywords
- sand
- core
- air supply
- supply unit
- chamber
- Prior art date
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Classifications
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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
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22C—FOUNDRY MOULDING
- B22C7/00—Patterns; Manufacture thereof so far as not provided for in other classes
- B22C7/06—Core boxes
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22C—FOUNDRY MOULDING
- B22C13/00—Moulding machines for making moulds or cores of particular shapes
- B22C13/08—Moulding machines for making moulds or cores of particular shapes for shell moulds or shell cores
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22C—FOUNDRY MOULDING
- B22C15/00—Moulding machines characterised by the compacting mechanism; Accessories therefor
- B22C15/23—Compacting by gas pressure or vacuum
- B22C15/24—Compacting by gas pressure or vacuum involving blowing devices in which the mould material is supplied in the form of loose particles
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22C—FOUNDRY MOULDING
- B22C19/00—Components or accessories for moulding machines
- B22C19/04—Controlling devices specially designed for moulding machines
Definitions
- Various aspects and embodiments of the present invention relate to a core sand filling apparatus and a core sand filling method for filling core sand into a core mold in a core molding machine.
- a core sand filling apparatus is a core sand filling apparatus in an under-blow type core molding machine that blows core sand from below a core mold toward an upper core mold.
- the core mold, and a blow head that is disposed below the core mold so as to be movable up and down relative to the core mold and communicated with each other, and is divided into a sand blowing chamber and a sand storage chamber,
- a compressed air supply unit that communicates with the sand storage chamber and supplies compressed air to the sand storage chamber; and aeration air that communicates with the sand blowing chamber and floats and fluidizes core sand in the sand blowing chamber.
- An aeration air supply unit configured to supply the sand blowing chamber; and an exhaust valve communicating with the sand blowing chamber and exhausting compressed air remaining in the sand blowing chamber.
- a second compressed air supply unit that supplies compressed air into the sand storage chamber may be communicated with the sand storage chamber.
- a second aeration air supply unit that supplies aeration air that floats and fluidizes core sand in the sand blowing chamber into the sand blowing chamber may be communicated with the sand blowing chamber.
- a part of the bottom surface of the sand storage chamber may be inclined, and the compressed air supply unit may be attached to the inclined surface.
- the exhaust valve may be communicated with the sand blowing chamber via an air pipe communicated with the aeration air supply unit.
- a pressure sensor for measuring the pressure in the sand blowing chamber may be mounted on the sand blowing chamber, and a pressure sensor for measuring the pressure in the sand storing chamber may be mounted on the sand storage chamber.
- a sand blowing nozzle may be arranged to protrude from the lower end of the plate at the lower end of a sand blowing hole drilled in a plate attached to the upper end of the sand blowing chamber.
- a core sand filling method is a core sand filling method in a core molding machine using the core sand filling device described above, wherein the core mold and the sand blowing chamber are provided.
- a step of closely contacting, a step of operating the aeration air supply unit to float and fluidize the core sand in the sand blowing chamber, a step of operating the compressed air supply unit, and the core sand in the sand storage chamber to the sand A step of feeding into the blowing chamber and blowing the core sand into the core mold, a step of stopping the operation of the aeration air supply unit, and a step of stopping the operation of the compressed air supply unit Operating the exhaust valve to exhaust the compressed air remaining in the sand blowing chamber.
- the working pressure of the aeration air supply unit and the compressed air supply unit may be the same pressure.
- the operating pressure of the compressed air supply unit may be higher than the operating pressure of the aeration air supply unit.
- a core sand filling apparatus is a core sand filling apparatus in an under-blow type core molding machine that blows core sand from below a core mold toward an upper core mold.
- the core mold, and a blow head that is disposed below the core mold so as to be movable up and down relative to the core mold and communicated with each other, and is divided into a sand blowing chamber and a sand storage chamber,
- a compressed air supply unit that communicates with the sand storage chamber and supplies compressed air to the sand storage chamber; and aeration air that communicates with the sand blowing chamber and floats and fluidizes core sand in the sand blowing chamber.
- the apparatus is miniaturized because the apparatus includes an aeration air supply unit that supplies the sand blowing chamber and an exhaust valve that communicates with the sand blowing chamber and exhausts compressed air remaining in the sand blowing chamber. It is equal various effects that it is possible to improve the filling of the core sand it is.
- FIG. 2 is an AA arrow view in FIG. 1.
- FIG. 3 is a view taken along arrow BB in FIG. 1.
- FIG. 2 is a view taken along the line CC in FIG. 1.
- FIG. 7 is a DD arrow view in FIG. 6.
- FIG. 7 is an EE arrow view in FIG. 6.
- FIG. 7 is a view taken along the line FF in FIG. 6.
- FIG. 12 is an AA arrow view in FIG. 11. It is a BB arrow line view in FIG.
- FIG. 12 is a CC arrow view in FIG. 11.
- FIG. 17 is a DD arrow view in FIG. 16.
- 3rd Embodiment it is a fragmentary front sectional view which shows the state in which the air layer was made between the upper surface of the core sand in the sand blowing chamber, and the lower end of a plate.
- 4th Embodiment it is a fragmentary front sectional view which shows the state in which the air layer was made between the upper surface of the core sand in the sand blowing chamber, and the lower end of a plate.
- FIG. 1 An example in which a shell core molding machine that molds a shell core by blowing and filling resin-coated sand into a heated mold will be described as an example of the core molding machine.
- the embodiment of the present invention shows an example using an underblow type core molding machine that blows core sand from the lower side of the core type toward the upper core type.
- the drawings mainly show a core sand filling device in a core molding machine. For this reason, illustration of components of the core molding machine other than the core sand filling device is omitted.
- FIG. 1 is a front sectional view of the core sand filling device according to the first embodiment
- FIG. 2 is a view taken along arrow AA in FIG. 1
- FIG. 3 is a view taken along arrow BB in FIG.
- FIG. 2 is a view taken along the line CC in FIG.
- a blow head 2 that can be moved up and down relative to the core mold 1 is disposed below the matched core mold 1 (in this embodiment, a mold).
- the blow head 2 is connected to a lift cylinder (not shown). In this embodiment, the blow head 2 is lifted and lowered with respect to the core mold 1 arranged at a predetermined position.
- the blow head 2 is divided into two chambers, an adjacent sand blowing chamber 4 and a sand storage chamber 5, by a partition plate 3 provided at an intermediate position. Thereby, the blowing chamber 4 and the sand storage chamber 5 are arrange
- a plate 4a that comes into close contact with the core mold 1 is attached to the upper end of the sand blowing chamber 4, and the core sand (not shown) in the sand blowing chamber 4 is attached to the plate 4a.
- a sand blowing hole 4b for blowing into the cavity 1a of the core mold 1 is formed.
- the core mold 1 has a vent hole (not shown) communicating with the cavity 1a.
- a sand blowing nozzle 6 is disposed at the lower end of the sand blowing hole 4b drilled in the plate 4a attached to the upper end of the sand blowing chamber 4 so as to protrude from the lower end of the plate 4a.
- the sand blowing hole 4b and the sand blowing nozzle 6 are communicated with each other.
- the plate 4 a attached to the upper end of the sand blowing chamber 4 is configured to be removable from the upper end of the sand blowing chamber 4.
- a fastening part, a clamp part, etc. are mentioned, for example.
- an opening 3a (see FIG. 2) is provided at the lower center of the partition plate 3, and the sand blowing chamber 4 and the sand storage chamber 5 are communicated with each other through the opening 3a.
- the sand storage chamber 5 has a part of the bottom surface which is an inclined surface 5a (see FIG. 1).
- the upper surface of the ceiling plate 5 b of the sand storage chamber 5 is positioned lower than the upper surface of the plate 4 a in the sand blowing chamber 4.
- a compressed air supply unit 7 for supplying compressed air into the sand storage chamber 5 is attached to a lower portion of the inclined surface 5 a in the sand storage chamber 5.
- the compressed air supply unit 7 communicates with the sand storage chamber 5.
- a bronze sintered body 7 a is attached to the tip of the compressed air supply unit 7.
- the base end of the compressed air supply unit 7 is communicated with a compressed air source (not shown) through an on-off valve 8.
- An aeration air supply unit 9 for supplying aeration air that floats and fluidizes core sand in the sand blowing chamber 4 into the sand blowing chamber 4 is mounted on the upper portion of the side wall of the sand blowing chamber 4. Yes.
- a bronze sintered body 9a is attached to the tip of the aeration air supply unit 9, and the aeration air supply unit 9 communicates with the sand blowing chamber 4 through the sintered body 9a. Yes.
- the aeration air supply unit 9 is attached to the plate member 4d, and is attached to the upper portion of the side wall of the sand blowing chamber 4 via the plate member 4d.
- the plate member 4d can be removed from the side wall of the sand blowing chamber 4 by a fastening portion (not shown).
- the plate member 4d can be mounted upside down. For this reason, when the plate member 4d is mounted upside down with respect to the state of FIG. 1, the position of the aeration air supply unit 9 is increased by a predetermined height. In the present embodiment, the height of the aeration air supply unit 9 can be adjusted in this way.
- three aeration air supply units 9 are mounted on the upper portion of the side wall of the sand blowing chamber 4.
- the present invention is not limited to this, and aeration air supply is not limited thereto. There may be at least one part 9.
- an air pipe 10 is communicated with the base end of the aeration air supply unit 9, and an open / close valve 11 is communicated with the base end of the air pipe 10.
- the on-off valve 11 communicates with a compressed air source (not shown).
- a branch air pipe 12 is communicated in the middle of the air pipe 10, and an exhaust valve 13 for exhausting compressed air remaining in the sand blowing chamber 4 communicates with the base end of the branch air pipe 12. Has been.
- a pressure sensor 14 for measuring the pressure in the sand blowing chamber 4 is mounted on the upper portion of the side wall orthogonal to the side wall on which the aeration air supply unit 9 is mounted.
- a pressure sensor 15 that measures the pressure in the sand storage chamber 5 is attached to the upper portion of the side wall of the sand storage chamber 5.
- a plate material 5c is attached to the upper end of the sand storage chamber 5, and a sand storage hole 5d is formed in the ceiling plate 5b and the plate material 5c of the sand storage chamber 5.
- a flange 16 having a through hole 16a is disposed above the plate member 5c, and a sand supply pipe 17 communicating with the through hole 16a is fixed to the upper end of the flange 16. Yes.
- the sand supply pipe 17 communicates with a sand hopper (not shown) through a sand supply hose (not shown).
- An opening / closing gate 18 having a communication hole 18a is disposed between the plate member 5c and the flange 16.
- the opening / closing gate 18 is opened and closed by a cylinder (not shown) (moves left and right). It has become.
- the blow head 2 is lowered by the lifting cylinder (not shown), the plate material 5c, the open / close gate 18, the flange 16 and the sand supply pipe 17 are all lowered.
- FIG. 5 is a flowchart showing the operation of the core sand filling device (core sand filling method).
- a step of closely contacting the core mold 1 and the sand blowing chamber 4 is performed (S10).
- the matched core mold 1 is placed at a predetermined position.
- the open / close gate 18 is closed by a cylinder (not shown).
- the blow head 2 is raised by an elevating cylinder (not shown) to obtain the state shown in FIG.
- the sand filling hole 5d is closed by an open / close gate 18, and the blow head 2 is sealed.
- Each of the sand blowing chamber 4 and the sand storage chamber 5 contains a necessary amount of core sand (not shown).
- the on-off valve 11 is opened and the aeration air supply unit 9 is operated (S12). If it does so, compressed air (namely, aeration air) will be ejected from the sintered compact 9a with which the aerating air supply part 9 was mounted
- compressed air namely, aeration air
- the core sand in the sand blowing chamber 4 is blown into the cavity 1a of the core mold 1 through the sand blowing nozzle 6 and the sand blowing hole 4b. At this time, the compressed air blown into the cavity 1a together with the core sand is exhausted from the vent hole (not shown).
- the on-off valve 11 and the on-off valve 8 are closed, and the operations of the aeration air supply unit 9 and the compressed air supply unit 7 are stopped (S18).
- a pressure difference is generated in the sand blowing chamber 4 and the sand storage chamber 5 due to the exhaust from the vent hole (not shown) communicating with the cavity 1 a of the core mold 1. More specifically, the pressure in the sand blowing chamber 4 is lower than the pressure in the sand storage chamber 5.
- the core sand in the sand blowing chamber 4 and the sand storage chamber 5 is subjected to pressure to move into the cavity 1a of the core mold 1, so that the core sand filled in the cavity 1a is filled. Will not fall.
- the exhaust valve 13 is operated (S19: the exhaust valve 13 is opened). Then, the compressed air remaining in the sand blowing chamber 4 is exhausted. More specifically, the compressed air remaining in the sand blowing chamber 4 enters the aeration air supply unit 9 from the sintered body 9 a, and is exhausted from the exhaust valve 13 through the air pipe 10 and the branch air pipe 12. At this time, since the compressed air remaining in the sand blowing chamber 4 and the sand storage chamber 5 flows from the sintered body 9a into the aeration air supply unit 9, the air can be stored along the flow. The core sand in the chamber 5 moves into the sand blowing chamber 4, and the sand blowing chamber 4 is filled with the core sand.
- the blow head 2 is lowered by a lift cylinder (not shown) to separate the core mold 1 and the blow head 2 (S24). Then, the exhaust valve 13 is closed (S25).
- the mold is opened and the core is taken out. Then, the open / close gate 18 is opened by a cylinder (not shown). Thereby, the core sand in the sand hopper is supplied into the sand storage chamber 5 through the sand supply pipe 17, the through hole 16a, the communication hole 18a, and the sand storage hole 5d (S26).
- FIG. 6 is a front sectional view of the core sand filling device according to the second embodiment
- FIG. 7 is a view taken along the line DD in FIG. 6
- FIG. 8 is a view taken along the line EE in FIG.
- FIG. 7 is a view taken along the line FF in FIG. 6.
- a second compressed air supply that supplies compressed air into the sand storage chamber 5 on the side wall extending in the vertical direction from the upper end of the inclined surface 5 a.
- a part 19 is mounted, and the second compressed air supply part 19 communicates with the sand storage chamber 5.
- a bronze sintered body 19 a is attached to the tip of the second compressed air supply unit 19.
- the second compressed air supply unit 19 communicates with the on-off valve 8 through an air pipe 20 together with the compressed air supply unit 7.
- a second aeration air supply unit that supplies aeration air that floats and fluidizes core sand in the sand blowing chamber 4 into the sand blowing chamber 4 on a part of the inclined surface 4 c of the bottom surface. 21 is attached, and the second aeration air supply unit 21 communicates with the sand blowing chamber 4.
- a bronze sintered body 21 a is attached to the tip of the second aeration air supply unit 21.
- two second aeration air supply sections 21 are mounted on a part of the inclined surface 4c of the bottom surface of the sand blowing chamber 4, but the present invention is not limited to this.
- the second aeration air supply unit 21 may be at least one.
- the base end of the second aeration air supply unit 21 is communicated with a compressed air source (not shown) through an on-off valve 22.
- the matched core mold 1 is placed at a predetermined position. Then, the open / close gate 18 is closed by a cylinder (not shown). Thereafter, the blow head 2 is raised by an elevating cylinder (not shown) to obtain the state shown in FIG. In the state shown in FIG. 6, the core mold 1 and the plate 4a are in close contact. The sand filling hole 5d is closed by an open / close gate 18, and the blow head 2 is sealed.
- Each of the sand blowing chamber 4 and the sand storage chamber 5 contains a necessary amount of core sand (not shown).
- the on-off valve 11 and the on-off valve 22 are opened, and the aeration air supply unit 9 and the second aeration air supply unit 21 are operated.
- compressed air that is, aeration air
- the core sand in the sand blowing chamber 4 is floated and fluidized.
- the on-off valve 8 is opened, and the compressed air supply unit 7 and the second compressed air supply unit 19 are operated.
- compressed air is ejected from the sintered body 7 a attached to the tip of the compressed air supply unit 7 and the sintered body 19 a attached to the tip of the second compressed air supply unit 19, and the inside of the sand storage chamber 5.
- Core sand is fed into the sand blowing chamber 4. Accordingly, the core sand in the sand blowing chamber 4 is blown into the cavity 1a of the core mold 1 through the sand blowing nozzle 6 and the sand blowing hole 4b. At this time, the compressed air blown into the cavity 1a together with the core sand is exhausted from the vent hole (not shown).
- the on-off valve 11, the on-off valve 22 and the on-off valve 8 are closed, and the aeration air supply unit 9 and the second aeration air supply unit 21, the operation of the compressed air supply unit 7 and the second compressed air supply unit 19 is stopped.
- a pressure difference is generated in the sand blowing chamber 4 and the sand storage chamber 5 due to the exhaust from the vent hole (not shown) communicating with the cavity 1 a of the core mold 1. More specifically, the pressure in the sand blowing chamber 4 is lower than the pressure in the sand storage chamber 5.
- the core sand in the sand blowing chamber 4 and the sand storage chamber 5 is subjected to pressure to move into the cavity 1a of the core mold 1, so that the core sand filled in the cavity 1a is filled. Will not fall.
- the exhaust valve 13 is operated (the exhaust valve 13 is opened). Then, the compressed air remaining in the sand blowing chamber 4 is exhausted. More specifically, the compressed air remaining in the sand blowing chamber 4 enters the aeration air supply unit 9 from the sintered body 9 a, and is exhausted from the exhaust valve 13 through the air pipe 10 and the branch air pipe 12. At this time, since the compressed air remaining in the sand blowing chamber 4 and the sand storage chamber 5 flows from the sintered body 9a into the aeration air supply unit 9, the air can be stored along the flow. The core sand in the chamber 5 moves into the sand blowing chamber 4, and the sand blowing chamber 4 is filled with the core sand.
- the blow head 2 When the pressure sensors 14 and 15 measure that the pressure in the blow head 2 is zero, the blow head 2 is lowered by a lift cylinder (not shown), and the core mold 1 and the blow head 2 are separated. Then, the exhaust valve 13 is closed.
- the mold is opened and the core is taken out.
- the open / close gate 18 is opened by a cylinder (not shown).
- the core sand in the sand hopper is supplied into the sand storage chamber 5 through the sand supply pipe 17, the through hole 16a, the communication hole 18a, and the sand storage hole 5d.
- the operating pressures of the aeration air supply unit 9 and the compressed air supply unit 7 are the same pressure.
- the pressure is the same, there is an advantage that the amount of air consumption can be reduced.
- the operating pressure of the aeration air supply unit 9 and the compressed air supply unit 7 is set to the same pressure as described above.
- the operation pressure of the compressed air supply unit 7 is not limited to this.
- the pressure may be higher than the operating pressure of the aeration air supply unit 9.
- the pressure in the sand storage chamber 5 becomes higher than the pressure in the sand blowing chamber 4, thereby generating a large pressure difference. For this reason, there exists an advantage that the movement of the core sand from the sand storage chamber 5 to the sand blowing chamber 4 is performed easily.
- the blow head 2 partitioned into the sand blowing chamber 4 and the sand storage chamber 5 communicating with each other can be moved up and down relatively with respect to the core mold 1. It is the structure arrange
- the compressed air supply unit 7 that communicates with the sand storage chamber 5 and supplies compressed air into the sand storage chamber 5 and the sand blowing chamber 4 and communicates with the sand blowing chamber 5.
- the aeration air supply unit 9 for supplying aeration air for floating and fluidizing core sand in the chamber 4 into the sand blowing chamber 4 and two air supply units, and compressed air from each of the air supply units Since the core sand is blown and filled in combination, even underflow type core molding machines have an effect of improving the core sand filling ability.
- a part of bottom face of the sand storage chamber 5 is made into the inclined surface 5a, and it has the structure by which the compressed air supply part 7 was mounted
- the effect by this structure is demonstrated.
- the core sand supplied into the sand storage chamber 5 becomes conical in the sand storage chamber 5 due to the angle of repose of the sand.
- the exhaust valve 13 is configured to communicate with the sand blowing chamber 4 through an air pipe communicated with the aeration air supply unit 9.
- the aeration air supply unit 9 since the exhausted air enters the aeration air supply unit 9 from the sintered body 9a, the aeration air supply unit 9 also serves as an exhaust unit. For this reason, even if the sintered body 9a may be clogged with sand during exhaust, the compressed air is next ejected from the sintered body 9a, and at that time, the clogging of the sintered body 9a is eliminated. There is an advantage that you can.
- a second compressed air supply unit 19 may be provided in addition to the compressed air supply unit 7.
- the cone-shaped pile of core sand is destroyed and the action which agitates core sand is accelerated
- the movement of the core sand from the sand storage chamber 5 to the sand blowing chamber 4 becomes smoother.
- a second aeration air supply unit 21 may be provided in addition to the aeration air supply unit 9. According to this structure, there exists an advantage that the effect
- the pressure sensor 14 which measures the pressure in this sand blowing chamber 4 is equipped in the sand blowing chamber 4, and the pressure in this sand storage chamber 5 is measured in the sand storage chamber 5.
- the pressure sensor 15 is mounted. According to this structure, there exists an advantage that the pressure difference in the sand blowing chamber 4 and the sand storage chamber 5 can be measured easily.
- the sand blowing nozzle 6 is arranged to protrude from the lower end of the plate 4a at the lower end of the sand blowing hole 4b drilled in the plate 4a attached to the upper end of the sand blowing chamber 4. It has been configured. Here, the effect by this structure is demonstrated in detail.
- the first embodiment of the present invention as described above, after the core sand in the sand blowing chamber 4 is blown into the cavity 1a of the core mold 1, the aeration air supply unit 9 and the compressed air supply unit 7 are operated. Is stopped.
- FIG. 10 shows a state where the air layer K is formed (reference S is core sand).
- reference S is core sand.
- core sand is blown into the cavity 1a of the core mold 1 next time.
- the tip of the sand blowing nozzle 6 is buried in the core sand, the air in the air layer K is not caught in the core sand, and the core sand is sufficiently filled into the cavity 1a.
- the tip of the sand blowing nozzle 6 is always buried in the core sand, so that core sand that has not been solidified in the cavity 1a is located at the air layer K. There is no falling. For this reason, there exists an advantage that the filling defect of the core sand in the cavity 1a can be prevented.
- a female screw is formed on the inner surface of the sand blowing hole 4b, and a male screw is formed on the outer surface of the sand blowing nozzle 6, and these are screwed together. Projecting from the lower end of the plate 4a.
- the present invention is not limited to this, and a sand blowing nozzle 6 is disposed at the lower end of the sand blowing hole 4b, and the sand blowing nozzle 6 is fixed to the plate 4a by welding or the like. You may make it protrude from the lower end of the plate 4a.
- a cylindrical pipe is used as the sand blowing nozzle 6, but the shape of the sand blowing nozzle 6 is not limited to this, and for example, an elliptical shape may be used. Good.
- the aeration air supply unit 9 is operated, and the compressed air supply unit 7 is operated after a predetermined time has passed.
- the present invention is not limited to this, and the aeration air supply unit After operating 9, the compressed air supply unit 7 may be operated when the pressure sensor 14 measures a predetermined pressure value in the sand blowing chamber 4.
- the predetermined pressure value in the sand blowing chamber 4 may be a pressure value lower than the operating pressure of the compressed air supply unit 7, but may be a pressure value within a range of 0.01 to 0.2 MPa. More preferable.
- the aeration air supply unit 9 and the second aeration air supply unit 21 may be activated or stopped at the same time or not at the same time. Further, the operation or stop timing of the compressed air supply unit 7 and the second compressed air supply unit 19 may be either simultaneous or not simultaneously. If it is desired to shift the operation or stop timing of the compressed air supply unit 7 and the second compressed air supply unit 19, a dedicated on-off valve is connected to each of the compressed air supply unit 7 and the second compressed air supply unit 19. You can make it.
- the blow head 2 raises / lowers with respect to the core type
- the core mold 1 may be moved up and down with respect to the blow head 2.
- the core molding machine an example in which a shell core molding machine that molds a shell core by blowing and filling resin-coated sand into a heated mold is shown.
- the present invention can be applied to core sand filling of a core molding machine by a cold box method which is a room temperature gas curing method.
- the open / close gate 18 is opened and closed by a cylinder (not shown).
- the present invention is not limited to this, and the open / close gate 18 may be opened and closed by a cam mechanism.
- the operation of the aeration air supply unit 9 and the compressed air supply unit 7 is stopped simultaneously.
- the present invention is not limited to this, and the aeration air supply unit 9 is supplied with compressed air. You may make it stop earlier than the part 7. FIG.
- the operating pressures of the aeration air supply unit 9, the second aeration air supply unit 21, the compressed air supply unit 7, and the second compressed air supply unit 19 are limited to specific pressure values.
- the aeration air supply unit 9 is 0.1 to 0.5 MPa
- the second aeration air supply unit 21 is 0.1 to 0.5 MPa
- the compressed air supply unit 7 is 0.1 to 0.5 MPa
- the 2-compressed air supply unit 19 preferably has an operating pressure of 0.1 to 0.5 MPa.
- the core sand filling apparatus according to the third embodiment will be described.
- a shell core molding machine that blows and fills resin-coated sand into a heated mold and molds a shell core
- this embodiment shows the example using the underblow type core molding machine which blows core sand toward the upper core type from the lower side of the core type.
- the drawings mainly show a core sand filling device in a core molding machine. For this reason, illustration of components of the core molding machine other than the core sand filling device is omitted.
- a blow head 32 that is movable up and down relative to the core mold 30 is disposed below the matched core mold 30 (a mold in the present embodiment). .
- the blow head 32 is connected to a lift cylinder (not shown). In this embodiment, the blow head 32 is lifted and lowered with respect to the core mold 30 disposed at a predetermined position.
- the blow head 32 is divided into two chambers, an adjacent sand blowing chamber 34 and a sand storage chamber 35, by a partition plate 33 provided at an intermediate position. Thereby, the sand blowing chamber 34 and the sand storage chamber 35 are arranged in a substantially horizontal direction.
- a plate 34a that is in close contact with the core mold 30 is attached to the upper end of the sand blowing chamber 34, and the core sand (not shown) in the sand blowing chamber 34 is attached to the plate 34a.
- a sand blowing hole 34b for blowing into the cavity 31a of the core mold 30 is formed.
- the core mold 30 has a vent hole (not shown) communicating with the cavity 31a.
- openings 33a are provided at both lower ends of the partition plate 33, and the sand blowing chamber 34 and the sand storage chamber 35 are communicated with each other via the opening 33a.
- the sand storage chamber 35 has a bifurcated shape and is divided into a left chamber 35a and a right chamber 35b.
- the left chamber 35a and the right chamber 35b communicate with each other at the upper portion.
- the left chamber 35a and the right chamber 35b are partly inclined surfaces (see FIG. 11).
- the upper surface of the ceiling plate 35 d of the sand storage chamber 35 is set at a position lower than the upper surface of the plate 34 a in the sand blowing chamber 34.
- An opening 33b is provided at the lower center of the partition plate 33. Compressed air for blowing the core sand in the sand blowing chamber 34 into the core mold 30 outside the opening 33b.
- a compressed air supply unit 36 is connected to supply the air into the sand blowing chamber 34.
- the compressed air introduction pipe 36b in the compressed air supply unit 36 is communicated with the sand blowing chamber 34 through the opening 33b.
- a bronze sintered body 36a is attached to the tip of the compressed air introduction pipe 36b.
- the compressed air introduction pipe 36b is disposed between the left chamber 35a and the right chamber 35b in the sand storage chamber 35, that is, between the two chambers (see FIGS. 13 and 14).
- the base end of the compressed air introduction pipe 36b is communicated with a compressed air source (not shown) through an open / close valve (not shown).
- An aeration air supply unit 37 for supplying aeration air that floats and fluidizes core sand in the sand blowing chamber 34 into the sand blowing chamber 34 is mounted on the side wall of the sand blowing chamber 34.
- a bronze sintered body (not shown) is attached to the tip of the aeration air supply unit 37, and the aeration air supply unit 37 enters the sand blowing chamber 34 through the sintered body. It is communicated.
- the proximal end of the aeration air supply unit 37 is communicated with a compressed air source (not shown) through an open / close valve (not shown).
- An exhaust unit 38 for exhausting compressed air remaining in the sand blowing chamber 34 is mounted on the side wall of the sand blowing chamber 34 above the aeration air supply unit 37.
- a bronze sintered body (not shown) is attached to the tip of the exhaust part 38, and the exhaust part 38 communicates with the sand blowing chamber 34 through the sintered body. .
- the base end of the exhaust part 38 is communicated with an open / close valve (not shown).
- a pressure sensor 39 for measuring the pressure in the blow head 32 is mounted on the side wall of the sand blowing chamber 34 below the aeration air supply unit 37.
- compressed air for sending core sand in the sand storage chamber 35 to the sand blowing chamber 34 is stored in the upper part of the side walls of the left chamber 35a and the right chamber 35b in the sand storage chamber 35.
- a sand feed air supply unit 40 for supplying the inside of the chamber 35 is mounted.
- a bronze sintered body (not shown) is attached to the tip of the sand feed air supply unit 40, and the sand feed air supply unit 40 is connected to the sand storage chamber via the sintered body. 35 is communicated.
- the base end of the sand feed air supply unit 40 is communicated with a compressed air source (not shown) through an open / close valve (not shown).
- a plate material 35c is attached to the upper end of the sand storage chamber 35, and a sand storage hole 35e is formed in the ceiling plate 35d and the plate material 35c of the sand storage chamber 35.
- a flange 41 having a through hole 41a is disposed above the plate member 35c, and a sand supply pipe 42 communicating with the through hole 41a is fixed to the upper end of the flange 41. Yes.
- the sand supply pipe 42 communicates with a sand hopper (not shown) through a sand supply hose (not shown).
- An opening / closing gate 43 having a communication hole 43a is disposed between the plate member 35c and the flange 41, and the opening / closing gate 43 is opened and closed by a cylinder (not shown) (moves left and right). It has become.
- a cylinder (not shown) (moves left and right). It has become.
- FIG. 15 is a flowchart showing an operation (core sand filling method) of the core sand filling apparatus.
- a step of closely contacting the core mold 30 and the sand blowing chamber 34 is performed (S10).
- the matched core mold 30 is placed at a predetermined position.
- the open / close gate 43 is closed by a cylinder (not shown).
- the blow head 32 is raised by an elevating cylinder (not shown) to obtain the state shown in FIG.
- the sand filling hole 35e is closed by an open / close gate 43, and the blow head 32 is sealed.
- Each of the sand blowing chamber 34 and the sand storage chamber 35 contains a necessary amount of core sand (not shown).
- an on-off valve (not shown) is opened, and the aeration air supply unit 37 is operated (S12). Then, compressed air (that is, aeration air) is ejected from the sintered body attached to the tip of the aeration air supply unit 37, and the core sand in the sand blowing chamber 34 is floated and fluidized. And after predetermined time progress, the on-off valve which is not illustrated is opened and the compressed air supply part 36 is operated (S14).
- an on-off valve (not shown) is opened, and the sand feed air supply unit 40 is operated (S16). Then, compressed air (that is, sand feed air) is ejected from the sintered body attached to the tip of the sand feed air supply unit 40, and the core sand in the sand storage chamber 35 is sent into the sand blowing chamber 34. Then, after a lapse of a predetermined time from the start of the operation of the sand feed air supply unit 40, an unillustrated on-off valve is closed and the operations of the aeration air supply unit 37 and the compressed air supply unit 36 are stopped (S18). At this time, the core sand in the sand blowing chamber 34 and the sand storage chamber 35 is subjected to pressure to move into the cavity 31a of the core mold 30, so the core sand filled in the cavity 31a. Will not fall.
- the on-off valve (not shown) is closed and the operation of the sand feed air supply unit 40 is stopped (S22). Thereafter, when the pressure sensor 39 measures that the pressure in the blow head 32 is zero, the blow head 32 is lowered by a lift cylinder (not shown) to separate the core mold 30 and the blow head 32 (S24). Then, an on-off valve (not shown) communicating with the exhaust unit 38 is closed.
- the mold is opened and the core is taken out.
- the open / close gate 43 is opened by a cylinder (not shown).
- the core sand in the sand hopper is supplied into the sand storage chamber 35 through the sand supply pipe 42, the through hole 41a, the communication hole 43a, and the sand storage hole 35e (S26).
- the operating pressures of the aeration air supply unit 37, the compressed air supply unit 36, and the sand feed air supply unit 40 are the same pressure.
- the pressure is the same, there is an advantage that the amount of air consumption can be reduced.
- the aeration air supply unit 37, the compressed air supply unit 36, and the sand feed air supply unit 40 have the same operating pressure as described above.
- the operating pressure of the unit 40 may be higher than the operating pressure of the aeration air supply unit 37 and the compressed air supply unit 36.
- the core sand in the sand storage chamber 35 is smoothly and continuously sanded by the pressure difference between the operating pressure of the sand feed air supply unit 40 and the operating pressure of the aeration air supply unit 37 and the compressed air supply unit 36.
- the operating pressure of the aeration air supply unit 37 and the compressed air supply unit 36 may be higher than the operating pressure of the aeration air supply unit 37 and the compressed air supply unit 36. Either the same pressure or the same pressure may be used.
- the blow head 32 divided into the sand blowing chamber 34 and the sand storage chamber 35 communicating with each other is disposed below the core mold 30 so as to be movable up and down relative to the core mold 30. It has been configured. Thereby, compared with a top blow type core molding machine, since the apparatus width of a perpendicular direction can be shortened, there exists an effect that an apparatus can be reduced in size. Further, by arranging the sand blowing chamber 34 and the sand storage chamber 35 in the substantially horizontal direction, the compressed air supply unit 36 is attached in the horizontal direction, and the sand supply pipe 42 is attached to the upper end side of the sand storage chamber 35. The vertical apparatus width can be further reduced.
- the compressed air supply unit communicates with the sand blowing chamber 34 and supplies compressed air for blowing the core sand in the sand blowing chamber 34 into the core mold 30.
- 36 an aeration air supply unit 37 that communicates with the sand blowing chamber 34 and that floats and fluidizes core sand in the sand blowing chamber 34, and a sand storage chamber 35.
- a sand feed air supply unit 40 for supplying compressed air for feeding core sand in the sand storage chamber 35 into the sand blowing chamber 34 and three air supply units. Since the core sand is blown and filled by combining compressed air jets from each air supply unit, the filling property of the core sand is good even with an underblow type core molding machine. There is an effect that can be.
- the aeration air supply unit 37 is activated and the compressed air supply unit 36 is activated after a predetermined time has passed.
- the present invention is not limited to this, and the aeration air supply unit 37 is activated.
- the compressed air supply unit 36 may be operated.
- the predetermined pressure value in the blow head 32 may be a pressure value lower than the operating pressure of the compressed air supply unit 36.
- the pressure value may be in the range of 0.01 to 0.2 MPa.
- the blow head 32 moves up and down with respect to the core mold 30 arranged at a predetermined position, but the present invention is not limited to this, and the blow head 32 arranged at a predetermined position is not limited thereto.
- the core mold 30 may be raised and lowered.
- the present invention is not limited thereto.
- the present invention can also be applied to core sand filling of a core molding machine by a cold box method which is a room temperature gas curing method.
- the operating pressures of the aeration air supply unit 37, the compressed air supply unit 36, and the sand feed air supply unit 40 are not limited to specific pressure values.
- the aeration air supply unit 37 has an operating pressure of 0.1 to 0.5 MPa
- the compressed air supply unit 36 has an operating pressure of 0.1 to 0.5 MPa
- the sand feed air supply unit 40 has an operating pressure of 0.1 to 0.5 MPa. Also good.
- the open / close gate 43 is opened and closed by a cylinder (not shown).
- the present invention is not limited to this, and the open / close gate 43 may be opened and closed by a cam mechanism.
- the sand storage chamber 35 is bifurcated and divided into a left chamber 35a and a right chamber 35b.
- the present invention is not limited to this, and the sand storage chamber 35 is a single room (one room). ).
- the compressed air supply unit 36 may pass through the sand storage chamber 35.
- a sand blowing nozzle 44 is placed at the lower end of a sand blowing hole 34b drilled in a plate 34a attached to the upper end of the sand blowing chamber 34. It is made to protrude from. The sand blowing hole 34b and the sand blowing nozzle 44 are communicated with each other. This is the difference in configuration from the third embodiment. Other than this, the configuration is the same as that of the third embodiment.
- the core sand in the sand blowing chamber 34 is the sand blowing nozzle 44 and the sand. It blows into the cavity 31a of the core mold 30 through the blow hole 34b. Only this point is different from the third embodiment.
- the core sand in the sand blowing chamber 34 sinks due to gravity drop, and an air layer (gap) K is formed between the upper surface of the core sand in the sand blowing chamber 34 and the lower end (lower surface) of the plate 34a ( (Refer FIG. 18, FIG. 19).
- FIG. 18 shows a state where the air layer K is formed in the third embodiment (reference S is core sand).
- reference S is core sand.
- core sand is blown into the cavity 31a of the core core 30 for the next time in this state.
- the core sand may not be sufficiently filled into the cavity 31a.
- the core sand that has not been solidified in the cavity 31a may fall to the air layer K, which may cause a filling failure of the core sand into the cavity 31a. May cause.
- FIG. 19 shows a state in which the air layer K is formed in the fourth embodiment (reference S is core sand).
- reference S is core sand.
- core sand is blown into the cavity 31a of the core core 30 for the next time in this state.
- the tip of the sand blowing nozzle 44 is buried in the core sand, the air in the air layer K is not caught in the core sand, and the core sand is sufficiently filled into the cavity 31a.
- the tip of the sand blowing nozzle 44 is always buried in the core sand, so that the core sand not solidified in the cavity 31a is located at the air layer K. There is no falling.
- a female screw is formed on the inner surface of the sand blowing hole 34b, and a male screw is formed on the outer surface of the sand blowing nozzle 44. It protrudes from the lower end of 34a.
- the present invention is not limited to this, and a sand blowing nozzle 44 is disposed at the lower end of the sand blowing hole 34b, and the sand blowing nozzle 44 is fixed to the plate 34a by welding or the like. You may make it protrude from the lower end of the plate 34a.
- a cylindrical pipe is used as the sand blowing nozzle 44, but the shape of the sand blowing nozzle 44 is not limited to this, and may be, for example, an elliptical shape.
- the plate 34 a attached to the upper end of the sand blowing chamber 34 is configured to be removable from the upper end of the sand blowing chamber 34.
- a fastening part, a clamp part, etc. are mentioned, for example.
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Casting Devices For Molds (AREA)
- Molds, Cores, And Manufacturing Methods Thereof (AREA)
- Devices For Post-Treatments, Processing, Supply, Discharge, And Other Processes (AREA)
Abstract
Description
Claims (10)
- 中子型の下方から上方の中子型に向かって中子砂を吹き込むアンダーブロー式の中子造型機における中子砂充填装置であって、
前記中子型と、
該中子型に対して相対的に昇降可能に該中子型の下方に配設されると共に互いに連通する砂吹き込み室と砂貯留室に区切られたブローヘッドと、
前記砂貯留室に連通されると共に圧縮エアーを該砂貯留室内に供給する圧縮エアー供給部と、
前記砂吹き込み室に連通されると共に該砂吹き込み室内の中子砂を浮遊流動化させるエアレーションエアーを該砂吹き込み室内に供給するエアレーションエアー供給部と、
前記砂吹き込み室に連通されると共に該砂吹き込み室内に残存する圧縮エアーを排気する排気弁と、
を具備する中子造型機における中子砂充填装置。 - 圧縮エアーを前記砂貯留室内に供給する第2圧縮エアー供給部が前記砂貯留室に連通されていることを特徴とする請求項1記載の中子造型機における中子砂充填装置。
- 前記砂吹き込み室内の中子砂を浮遊流動化させるエアレーションエアーを前記砂吹き込み室内に供給する第2エアレーションエアー供給部が前記砂吹き込み室に連通されていることを特徴とする請求項1又は2のいずれかに記載の中子造型機における中子砂充填装置。
- 前記砂貯留室の底面の一部が傾斜面にされており、該傾斜面に前記圧縮エアー供給部が装着されていることを特徴とする請求項1又は2に記載の中子造型機における中子砂充填装置。
- 前記排気弁が、前記エアレーションエアー供給部に連通されたエアー配管を介して前記砂吹き込み室に連通されていることを特徴とする請求項1又は2に記載の中子造型機における中子砂充填装置。
- 前記砂吹き込み室に該砂吹き込み室内の圧力を測定する圧力センサを装着し、且つ、前記砂貯留室に該砂貯留室内の圧力を測定する圧力センサを装着したことを特徴とする請求項1又は2に記載の中子造型機における中子砂充填装置。
- 前記砂吹き込み室の上端に付属されたプレートに穿設された砂吹き込み孔の下端に砂吹き込みノズルを前記プレートの下端から突出させて配設したことを特徴とする請求項1又は2に記載の中子造型機における中子砂充填装置。
- 請求項1記載の中子造型機における中子砂充填装置を用いた中子造型機における中子砂充填方法であって、
前記中子型と前記砂吹き込み室を密着させる工程と、
前記エアレーションエアー供給部を作動させ、前記砂吹き込み室内の中子砂を浮遊流動化させる工程と、
前記圧縮エアー供給部を作動させ、前記砂貯留室内の中子砂を前記砂吹き込み室に送り込み、且つ、前記砂吹き込み室内の中子砂を前記中子型に吹き込む工程と、
前記エアレーションエアー供給部の作動を停止させる工程と、
前記圧縮エアー供給部の作動を停止させる工程と、
前記排気弁を作動させ、前記砂吹き込み室内に残存する圧縮エアーを排気する工程と、
を有する中子造型機における中子砂充填方法。 - 前記エアレーションエアー供給部及び前記圧縮エアー供給部の作動圧力が同一圧力であることを特徴とする請求項8記載の中子造型機における中子砂充填方法。
- 前記圧縮エアー供給部の作動圧力が、前記エアレーションエアー供給部の作動圧力より高くされていることを特徴とする請求項8記載の中子造型機における中子砂充填方法。
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BR112013031051A BR112013031051B8 (pt) | 2011-06-03 | 2012-05-18 | dispositivo de preenchimento com areia de macho e método de preenchimento com areia macho na máquina de fabricação de macho |
JP2013517965A JP5983605B2 (ja) | 2011-06-03 | 2012-05-18 | 中子造型機における中子砂充填装置及び中子砂充填方法 |
EP12793868.6A EP2712690B1 (en) | 2011-06-03 | 2012-05-18 | Core sand filling device and core sand filling method in core making machine |
CN201280019904.8A CN103492104B (zh) | 2011-06-03 | 2012-05-18 | 型芯造型机的型芯砂填充装置以及型芯砂填充方法 |
ES12793868.6T ES2592221T3 (es) | 2011-06-03 | 2012-05-18 | Dispositivo de llenado de arena para machos y procedimiento de llenado de arena para machos en máquina de fabricación de machos |
MX2013013990A MX2013013990A (es) | 2011-06-03 | 2012-05-18 | Dispositivo de relleno de arena para machos y metodo de relleno de arena para machos en maquina de fabricacion de machos. |
DK12793868.6T DK2712690T3 (en) | 2011-06-03 | 2012-05-18 | Core Sand Filling Accommodation and core sand filling method in core making machine |
US14/123,329 US8997835B2 (en) | 2011-06-03 | 2012-05-18 | Core sand filling device and core sand filling method in core making machine |
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BR112013031051B8 (pt) | 2019-10-15 |
US20140116636A1 (en) | 2014-05-01 |
JP5983605B2 (ja) | 2016-08-31 |
EP2712690B1 (en) | 2016-06-29 |
CN103492104B (zh) | 2015-10-07 |
ES2592221T3 (es) | 2016-11-28 |
BR112013031051B1 (pt) | 2019-03-26 |
MX2013013990A (es) | 2014-05-27 |
US8997835B2 (en) | 2015-04-07 |
CN103492104A (zh) | 2014-01-01 |
BR112013031051A2 (pt) | 2016-11-29 |
EP2712690A4 (en) | 2015-06-03 |
EP2712690A1 (en) | 2014-04-02 |
JPWO2012165181A1 (ja) | 2015-02-23 |
DK2712690T3 (en) | 2016-08-22 |
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