WO2018147030A1

WO2018147030A1 - Molding sand supply device

Info

Publication number: WO2018147030A1
Application number: PCT/JP2018/001391
Authority: WO
Inventors: 信幸河合; 剛大杉野
Original assignee: 新東工業株式会社
Priority date: 2017-02-07
Filing date: 2018-01-18
Publication date: 2018-08-16
Also published as: TW201840375A; CN109641262A; JPWO2018147030A1; CN109641262B

Abstract

Provided is a molding sand supply device for supplying molding sand in stable condition. In the molding sand supply device (12), molding sand (22) stored in a sand hopper (16) is supplied to the outside from an opening portion (28) by a belt conveyor (20). The opening portion is fitted with a cut gate (18), and the belt conveyor is operated for a predetermined time after the cut gate is closed. Accordingly, the molding sand that was left on the belt conveyor after the cut gate is closed is supplied to the outside and does not remain on the belt conveyor (20). Thus, it becomes possible to prevent molding sand left on the belt conveyor from becoming dried and being supplied to the outside during the next operation.

Description

Mold sand feeder

The present invention relates to a mold sand supply apparatus.

The following Patent Document 1 discloses a sand kneading apparatus. In this kneading apparatus, a sand hopper for storing sand and a kneading machine are provided, and the sand stored in the sand hopper is supplied to the kneading machine by a belt feeder.

However, according to the configuration disclosed in Patent Document 1, when the belt feeder is stopped, sand remains on the belt feeder, and when time elapses in that state, the sand on the belt feeder dries and the next operation is started. In this case, dry sand may be supplied to the kneader. That is, since sand having a different moisture content relative to the stored sand is supplied to the kneader, there is room for improvement from the viewpoint of stabilizing the properties of the mold sand.

The present invention has been made in consideration of the above problems, and an object of the present invention is to provide a molding sand supply device that can supply molding sand having stable properties.

JP 11-33671 A

The molding sand supply apparatus according to the first aspect of the present invention stores the molding sand inside, and has a storage section having an opening communicating with the inside and the outside, the opening of the storage section, and the opening. An opening / closing part that opens and closes a part, and a supply means that is operated to supply the molding sand to the outside from the opening part of the storage part, and that operates for a predetermined time after the opening / closing part closes the opening part, have.

According to the first aspect of the present invention, the molding sand stored in the storage portion is supplied from the opening portion to the outside by the supply means. The opening is provided with an opening / closing part, and the supply means operates for a predetermined time when the opening / closing part is closed. Therefore, the molding sand remaining in the supply means after the opening / closing part is closed is supplied to the outside and therefore does not remain in the supply means. As a result, it is possible to prevent the mold sand remaining in the supply means from drying and supplying the mold sand that has been dried in the next operation to the outside.

The molding sand supply apparatus according to a second aspect of the present invention is the molding sand supply apparatus according to the first aspect of the present invention, wherein the supply means supplies the molding sand to the kneader for kneading the molding sand from the opening of the storage section. is doing.

According to the second aspect of the present invention, since the supply means supplies the mold sand to the kneading machine, the kneading machine does not have the mold sand dried by remaining in the supply means, but the storage section. The mold sand of a certain property stored in is supplied. Therefore, the mold sand having stable properties can be kneaded by the kneader.

The molding sand supply apparatus according to a third aspect of the present invention is the molding sand supply apparatus according to the second aspect of the present invention, wherein the opening, the opening / closing part, and the kneading machine are provided in a pair with the storage part interposed therebetween, The supply means supplies the molding sand to the pair of kneaders from the opening.

According to the third aspect of the present invention, since the opening, the opening / closing part, and the kneader are provided in a pair with the storage part interposed therebetween, the supply means is operated to one side to leave the mold sand in the supply means. The mold sand can be supplied to one kneading machine without causing the mold sand to be supplied, and then the supply means can be operated to the other side to supply the mold sand to the other kneading machine without leaving the mold sand in the supply means. That is, the processing capacity for kneading the mold sand can be increased while minimizing the size of the apparatus.

The molding sand supply apparatus according to a fourth aspect of the present invention is the molding sand supply apparatus according to the first aspect of the present invention, wherein the supplying means is configured to mold a mold using the molding sand from the opening of the storage section. The mold sand is supplied.

According to the fourth aspect of the present invention, since the supplying means supplies the molding sand to the molding machine, the molding machine does not store the molding sand which is dried by remaining in the supplying means, but the storage section. The mold sand of a certain property stored in is supplied. Therefore, it is possible to mold with a molding machine using mold sand having stable properties.

The casting sand supply apparatus according to the present invention has an excellent effect that casting sand having a stable property can be supplied.

This application is based on Japanese Patent Application No. 2017-020490 filed on February 7, 2017 in Japan, the contents of which form part of the present application.
The present invention will also be more fully understood from the following detailed description. However, the detailed description and specific examples are preferred embodiments of the present invention and are described for illustrative purposes only. This is because various changes and modifications will be apparent to those skilled in the art from this detailed description.
The applicant does not intend to contribute any of the described embodiments to the public, and the disclosed modifications and alternatives that may not be included in the scope of the claims are equivalent. It is part of the invention under discussion.
In this specification or in the claims, the use of nouns and similar directives should be interpreted to include both the singular and the plural unless specifically stated otherwise or clearly denied by context. The use of any examples or exemplary terms provided herein (eg, “etc.”) is merely intended to facilitate the description of the invention and is not specifically recited in the claims. As long as it does not limit the scope of the present invention.

(A) is a side view which shows the casting sand supply apparatus which concerns on 1st Embodiment, (B) is a front view of (A). It is an expanded sectional view which shows the principal part of the casting sand supply apparatus which concerns on 1st Embodiment. (A) is sectional drawing which shows the open state in the opening-and-closing part of the casting sand supply apparatus which concerns on 1st Embodiment, (B) is sectional drawing which shows a closed state with respect to (A). (A) is a side view which shows the casting sand supply apparatus which concerns on 2nd Embodiment, (B) is a front view of (A). It is a figure which shows embodiment used for supplying mold sand to a molding machine with a mold sand supply apparatus, (A) is a side view, (B) is a front view of (A).

(First embodiment)
Hereinafter, a first embodiment of a molding sand supply apparatus according to the present invention will be described with reference to FIGS.

As shown in FIG. 1 (A), a continuous kneading device 10 constituting a part of a casting line (not shown) is provided with a mold sand supply device 12 and a kneader hopper 14.

The mold sand supply device 12 includes a sand hopper 16 as a storage part, a cut gate 18 as an opening / closing part, and a belt conveyor 20 as supply means. The sand hopper 16 is supplied with mold sand 22 from the top to the inside, and can store a predetermined amount of the mold sand 22 (see FIG. 2). Further, as shown in FIG. 1 (B), the lower side wall 24 of the sand hopper 16 is inclined so as to be directed toward the center of the width direction of the sand hopper 16 as it goes downward, and the width is narrowed. .

The storage unit is not limited to the sand hopper 16 and may be a tank or other container for storing the mold sand 22. The opening / closing part is not limited to the cut gate 18 and may be other opening / closing means such as a gate and a valve for preventing the molding sand 22 from being carried out of the storage part. Moreover, as a supply means, it is not restricted to the belt conveyor 20, Other conveying apparatuses, such as a screw conveyor and a vibration feeder which convey the casting sand 22, may be sufficient.

3A and 3B, an opening 28 is provided in the lower part of the side wall 26 of the sand hopper 16 on the carry-out side of the mold sand 22 (downstream side of the belt conveyor 20). The opening 28 includes a notch 30 that penetrates the side wall 26 in the thickness direction, a guide plate 32 that is attached to the notch 30, and a flow rate adjustment unit 34 that is provided below the guide plate 32. have. The guide plate 32 includes an inclined wall portion 36 that is inclined so as to go to the outside of the sand hopper 16 from the outer edge portion of the notch portion 30 toward the lower side of the apparatus, and the belt conveyor 20 from the lower end portion of the inclined wall portion 36. And a folded wall portion 38 extending to the outside of the sand hopper 16 along the upper surface.

The flow rate adjusting unit 34 includes a holding plate 40 and a movable plate 42. The holding plate 40 has an upper wall 44 that extends from the guide plate 32 to the outside of the sand hopper 16 and a side wall 46 that extends in the vertical direction of the device. A bolt 48 whose longitudinal direction is the vertical direction of the apparatus is rotatably attached to the outer surface of the side wall 46. The movable plate 42 includes a side wall 50 that comes into contact with the side wall 46 of the holding plate 40, and an upper wall 54 that extends from the upper end of the side wall 50 to the outside of the apparatus and to which a nut 52 that is screwed with a bolt 48 is fixed. The cross section along the vertical direction of the device is formed in an L shape. That is, the movable plate 42 can be moved relative to the holding plate 40 in the vertical direction of the apparatus by rotating the bolt 48. Therefore, by adjusting the position of the movable plate 42, the distance between the lower end of the movable plate 42 and the upper surface of the belt conveyor 20 passing through the inside of the sand hopper 16 is changed, and the amount of the mold sand 22 supplied from the sand hopper 16 is changed. Adjustable. The structure of the flow rate adjusting unit is not limited to the above, and may be a known structure that can adjust the gap with the upper surface of the belt conveyor 20 above the belt conveyor 20.

The cut gate 18 is provided in the opening 28 and includes a cylinder 56, a position detection unit 60, and a shielding plate 62. The cylinder 56 is fixed above the notch 30 in the side wall 26 of the sand hopper 16 with the vertical direction of the device as the longitudinal direction, and the tip portion 66 of the piston rod 64 can be extended to the lower side of the device during operation. The cylinder 56 is connected to a control device (not shown) that constitutes a part of the supply means, and the expansion / contraction operation is controlled by the control device. The movement of the shielding plate 62 in the vertical direction is not limited to the cylinder 56, and may be a mechanical structure such as a screw or an electromagnetic structure such as a solenoid.

The position detection unit 60 is provided on the distal end portion 66 side of the piston rod 64, and a detection body 70 attached to an extension portion 68 that extends from the distal end portion 66 to the lower side of the apparatus, and is separated from the detection body 70. And a proximity switch 74 attached to the outer edge of the cutout portion 30 of the side wall 26 via a bracket 72. A plurality (two in this embodiment) of proximity switches 74 are provided apart from each other in the vertical direction of the device, and each proximity switch 74 is connected to a control device. Each proximity switch 74 sends a signal to the control device when the detection body 70 approaches. Thereby, the position of the detection body 70 and the piston rod 64 can be detected. The position detection unit 60 is not limited to the above configuration, and may be an encoder or the like.

The shield plate 62 has a proximal end 78 side attached to the extending portion 68 of the piston rod 64 by welding, and extends along the vertical direction of the apparatus. As shown in FIG. 3A, when the cylinder 56 is contracted, the tip 80 of the shielding plate 62 is moved to the substantially same position as the folded wall portion 38 of the guide plate 32. Further, as shown in FIG. 3B, when the cylinder 56 is extended, the tip 80 of the shielding plate 62 is brought into contact with the upper surface of the belt conveyor 20, specifically, the upper surface of the belt conveyor 20. Then, the wet mold sand 22 placed on the belt conveyor 20 is moved to a position for damming. In addition, although the shielding board 62 is attached to the extension part 68 of the piston rod 64 by welding, it is good not only as this but a structure attached with fasteners, such as a volt | bolt.

The shielding plate 62 is inserted into the support portion 82. The support part 82 has a pair of board | plate material 84 comprised with the resin material as an example. Between one plate member 84 and the other plate member 84, there is a gap having the same dimension as the thickness of the shielding plate 62, and the shielding plate 62 is inserted through the gap. Thereby, when a load is input in the direction perpendicular to the surface of the shielding plate 62, the transmission of the load to the piston rod 64 and the cylinder 56 is suppressed. In addition, in this embodiment, although the support part 82 is comprised by a pair of board | plate material 84, it may comprise not only this but a pair of roller. Moreover, it is good also as a structure which does not provide the support part 82 by improving the rigidity of piston rod 64 and cylinder 56 itself.

As shown in FIG. 2, the belt conveyor 20 is provided in the conveyance table 86, and the driving roller 90 provided at one end 88 in the longitudinal direction of the conveyance table 86 and the other in the longitudinal direction of the conveyance table 86. And a driven roller 94 provided at the end 92 of the roller. The conveying table 86 supports the belt conveyor 20 of the mold sand supply device 12 at a predetermined height, that is, an appropriate height for carrying out the casting sand 22 at the bottom of the sand hopper 16 and supplying it to the kneader hopper 14. It is a support structure for. The driving roller 90 is rotated via a power belt 98 from a power generation unit 96 that is connected to the control device and whose operation is controlled by the control device. As a result, the belt conveyor 20 also rotates. The drive roller 90, the driven roller 94, the power belt 98 and the power generation unit 96 are covered with a cover 100. In the present embodiment, the belt conveyor 20 has its upper surface rotated from the driven roller 94 to the driving roller 90. The belt conveyor 20 is also stretched over an idler 102 provided in the vicinity of the driving roller 90 and the driven roller 94, whereby the tension of the belt conveyor 20 is kept substantially constant.

The conveyance table 86 is provided with a sand detection device 104, a moisture measurement device 106, and a sand temperature measurement device 108. The sand detection device 104 is provided in the vicinity of the opening 28, and a plurality of measuring elements 110 spaced apart from the upper surface of the belt conveyor 20 are arranged in the width direction of the transport table 86 (see FIG. 1B). The presence or absence of the molding sand 22 on the belt conveyor 20 is detected when the molding sand 22 contacts the measuring element 110. The moisture measuring device 106 and the sand temperature measuring device 108 are provided in the vicinity of the drive roller 90 and measure the moisture content and temperature of the mold sand 22 on the belt conveyor 20. The sand detection device 104, the moisture measurement device 106, and the sand temperature measurement device 108 are connected to the control device, and the detection result and the measurement result are sent to the control device. Based on the detection result and the measurement result, the amount of water injected for the molding sand 22 to have the target property in the kneader hopper 14 is determined by the control device.

As shown in FIG. 1, a kneader hopper 14 is provided on the lower side of the driving roller 90. The kneader hopper 14 is provided with an opening (not shown) in the upper part, and the mold sand 22 on the belt conveyor 20 moved to the driving roller 90 is supplied into the kneader hopper 14 through this opening. A predetermined amount of mold sand is stored in the kneader hopper 14. The prescribed amount of mold sand is, for example, mold sand for several batches from an amount equivalent to a kneading capacity in a kneader (not shown) connected to the kneader hopper 14. Upon receiving a signal from the kneader, the kneader hopper 14 opens a shielding means (not shown) provided between the kneader and supplies a predetermined amount (for example, one batch) of molding sand to the kneader. . When the supply to the kneading machine is completed, the kneading machine hopper 14 closes the shielding means, and then reaches the specified amount in the kneading machine hopper 14 from the sand hopper 16 via the belt conveyor 20 until the timing when the mold sand is supplied to the kneading machine. Mold sand is supplied until it reaches. On the other hand, the kneader is connected to a control device, and is injected with a water injection amount determined from the measurement results of the moisture measuring device 106 and the sand temperature measuring device 108, and the molding sand 22 has a target property. Thus, the molding sand 22 is kneaded appropriately. The kneaded mold sand 22 is supplied to a mold making machine (not shown), and a mold is manufactured.

Next, the operation of the above-described continuous kneading apparatus 10 will be described.

When the belt conveyor 20 of the continuous kneading apparatus 10 is operated, as shown in FIG. 2, the mold sand 22 put into the sand hopper 16 is placed on the upper surface of the belt conveyor 20 from the opening 28 to the outside of the sand hopper 16. And is supplied to the kneader hopper 14. When a predetermined amount of the mold sand 22 is supplied to the kneader hopper 14 (a certain ratio with respect to the prescribed amount of the kneader hopper 14 described above), the control device extends the cylinder 56 of the cut gate 18. Thereby, as shown in FIG. 3B, the tip 80 of the shielding plate 62 moves to a position close to the upper surface of the belt conveyor 20. Thereby, since the molding sand 22 in the sand hopper 16 is blocked by the shielding plate 62, the movement of the molding sand 22 on the sand hopper 16 side from the shielding plate 62 is restricted, and the molding sand 22 is further supplied from the sand hopper 16. Absent.

Even after the cut gate 18 is actuated so as to close the opening 28, the power conveyor 96 is actuated for a predetermined time by the control device, whereby the belt conveyor 20 is actuated for a predetermined time. The predetermined time is a portion on the belt conveyor 20 corresponding to the front end 80 of the shielding plate 62 when the cut gate 18 is activated and the front end 80 of the shielding plate 62 moves to a position close to the upper surface of the belt conveyor 20. Is set to be longer than the time required to pass through the driving roller 90. Therefore, almost no mold sand 22 on the belt conveyor 20 is supplied to the kneader hopper 14. In addition, after predetermined time progress, the belt conveyor 20 stops by the action | operation of the power generation part 96 being stopped by a control apparatus. Thereafter, when receiving a signal from the kneader, the kneader hopper 14 opens a shielding means provided between the kneader and supplies a certain amount of mold sand to the kneader. When the supply of the mold sand to the kneading machine is finished, the kneader hopper 14 closes the shielding means, and then the kneader hopper 14 again from the sand hopper 16 via the belt conveyor 20 until the timing of supplying the mold sand to the kneader. Mold sand is supplied until the specified amount is reached. On the other hand, the kneader receives the mold sand supplied from the kneader hopper 14 and starts operation when the amount of water determined from the measurement result of the moisture content and temperature of the mold sand 22 is poured. Sand 22 is kneaded.

When the kneading is finished and the mold sand 22 is supplied from the inside of the kneader to the mold making machine, the belt conveyor 20 is operated again, and the cut gate 18 is operated so that the tip 80 of the shielding plate 62 is moved to the guide plate 32. Move to the folded wall 38. Thereby, the molding sand 22 stored in the sand hopper 16 is supplied again from the opening 28 to the kneader.

(Operation and effect of the first embodiment)
Next, the operation and effect of this embodiment will be described.

In the present embodiment, as shown in FIG. 2, the mold sand 22 stored in the sand hopper 16 is supplied from the opening 28 to the outside by the belt conveyor 20. A cut gate 18 is provided in the opening 28, and the belt conveyor 20 operates for a predetermined time when the cut gate 18 is closed. Therefore, the molding sand 22 remaining on the belt conveyor 20 after the cut gate 18 is closed is not supplied to the belt conveyor 20 because it is supplied to the outside as the kneader hopper 14. As a result, it is possible to prevent the molding sand 22 remaining on the belt conveyor 20 from drying and supplying the dried molding sand 22 to the outside during the next operation. Thereby, the property of the mold sand 22 can be stabilized.

In addition, the belt conveyor 20 supplies the mold sand 22 to the kneader hopper 14. In other words, the mold sand 22 immediately before being put into the kneader hopper 14 exists on the belt conveyor 20. Therefore, there is almost no change in the moisture content of the molding sand 22 after the moisture content of the molding sand 22 on the belt conveyor 20 is measured by the moisture measuring device 106 until it is supplied to the kneader hopper 14. Thereby, the divergence between the measurement result of the moisture measuring device 106 and the moisture content of the mold sand 22 actually put into the kneader hopper 14 can be suppressed. That is, the measurement result of the moisture measuring device 106 can be grasped as an accurate moisture amount of the mold sand 22 put into the kneader, and kneading can be performed while adjusting the amount of water injected by the kneader based on the measurement result. Therefore, the molding sand 22 having stable properties can be obtained.

(Second Embodiment)
Next, the continuous kneading apparatus 118 according to the second embodiment of the present invention will be described with reference to FIG. In addition, about the same component as 1st Embodiment mentioned above, the same code | symbol is attached | subjected and the description is abbreviate | omitted.

As shown in FIGS. 4 (A) and 4 (B), the molding sand supply device 120 according to the second embodiment has the same basic configuration as that of the first embodiment. A feature is that a pair of 28 and the cut gate 18 are provided with the sand hopper 16 in between.

That is, an opening 124 is provided in the side wall 122 opposite to the side wall 26 of the sand hopper 16. The opening 124 has the same configuration as the opening 28 provided in the side wall 26 and is symmetrical with respect to the opening 28 about the sand hopper 16. Similarly, the cut gate 126 provided in the opening 124 has the same configuration as the cut gate 18 provided in the opening 28 and is symmetrical with respect to the cut gate 18 around the sand hopper 16. Yes. In addition, in the vicinity of the opening 124, the sand detection device 104, the moisture measurement device 106, and the sand temperature measurement device 108 have the same configuration, and the sand detection device 104, the moisture measurement device 106, and the sand temperature measurement device 108 have the same configuration. On the other hand, a sand detecting device 128, a moisture measuring device 130, and a sand temperature measuring device 140 which are symmetrical with respect to the sand hopper 16 are provided.

The belt conveyor 20 is driven by driving

rollers

90 and 95 at both ends 88 and 92. That is, the driving roller 95 driven by the power generation unit 96 is provided at the position where the driven roller 94 is used in the first embodiment. A kneader hopper 142 is provided below the drive roller 95. The kneader hopper 142 has the same configuration as the kneader hopper 14 provided on the lower side of the drive roller 90 and is symmetrical with respect to the kneader hopper 14 around the sand hopper 16.

Next, the operation of the mold sand supply device 120 will be described.

As with the mold sand supply device 12 of the first embodiment, when a predetermined amount of the mold sand 22 is supplied to the kneader hopper 14, the belt conveyor 20 is moved to a predetermined state after the cut gate 18 is activated so as to close the opening 28. The mold sand 22 is not substantially left on the belt conveyor 20 by operating for a time. After the predetermined time has elapsed, the operation of the belt conveyor 20 changes according to the capacity of the molding sand in the kneader hopper 142. Specifically, the operation of the belt conveyor 20 is stopped when there is already a sufficient amount of mold sand in the kneader hopper 142 that does not require further supply of mold sand (for example, “full state”). . On the other hand, in a state where the mold sand needs to be fed into the kneader hopper 142 (for example, “other than full state”), the belt conveyor 20 rotates in the reverse direction, and the cut gate 126 that previously closed the opening 124 opens. Actuate to open 124. Thus, the mold sand 22 put into the sand hopper 16 moves from the opening 124 to the outside of the sand hopper 16 while being placed on the upper surface of the belt conveyor 20, and is supplied to the kneader hopper 142. When a predetermined amount of the mold sand 22 is supplied to the kneader hopper 142, the control device extends the cylinder 146 of the cut gate 126. Therefore, the tip 150 of the shielding plate 148 moves to a position close to the upper surface of the belt conveyor 20. Thereby, since the molding sand 22 in the sand hopper 16 is blocked by the shielding plate 148, the movement of the molding sand 22 on the sand hopper 16 side from the shielding plate 148 is restricted.

Even after the cut gate 126 is operated so as to close the opening 124, the belt conveyor 20 is operated for a predetermined time. The predetermined time is that when the cut gate 126 is activated and the front end 150 of the shielding plate 148 moves to the upper surface of the belt conveyor 20, the portion on the belt conveyor 20 corresponding to the front end 150 of the shielding plate 148 is the driving roller 95. It is set to be more than the time to pass through. Therefore, since the molding sand 22 on the belt conveyor 20 is all supplied to the kneader hopper 142, the molding sand is not substantially left on the belt conveyor 20. Then, after the water injection amount determined by the control device from the measurement result of the water content and temperature of the mold sand 22 is poured into the kneader, the operation of the kneader is started and the mold sand 22 is kneaded. The belt conveyor 20 is stopped when the molding sand in the kneader hopper 14 is full after a predetermined time has elapsed, and is again activated when the molding sand in the kneader hopper 14 is not full. By forward rotation, supply of the molding sand 22 to the kneader hopper 14 is started.

(Operation and effect of the second embodiment)
Next, the operation and effect of this embodiment will be described.

Also with the above configuration, the

kneader hoppers

14 and 142, the

openings

28 and 124, and the

cut gates

18 and 126 are provided in a pair with the sand hopper 16 interposed therebetween, similarly to the mold sand supply device 12 of the first embodiment. Since it is comprised, the effect similar to 1st Embodiment is acquired.

Further, since the

openings

28 and 124, the

cut gates

18 and 126, and the

kneader hoppers

14 and 142 are provided in a pair with the sand hopper 16 in between, the belt conveyor 20 is operated to one side and the mold is applied to the belt conveyor 20. The mold sand 22 is supplied to one kneader hopper 14 without leaving the sand 22, and then the belt conveyor 20 is operated to the other side so that the mold sand 22 does not remain on the belt conveyor 20. The sand mold 22 can be supplied to 142. That is, the processing capacity for kneading the mold sand 22 can be increased while minimizing the size of the apparatus.

In the description so far, the mold

sand supply devices

12 and 120 have been described as supplying the mold sand 22 to the kneader, specifically, to the

kneader hoppers

14 and 142. For example, as shown in FIG. Mold sand 22 may be supplied to the molding machine. *

As shown in FIG. 5 (A), a molding sand supply device 12 and a molding machine sand tank 200 are provided in a molding machine that constitutes a part of a casting line (not shown). The configuration of the molding sand supply device 12 is the same as the configuration of the molding sand supply device 12 shown in FIG.

When the mold sand supply device 12 is used for a molding machine, the compaction value (CB value) measuring device 112 is provided on the transport table 86 in addition to the sand detecting device 104, the moisture measuring device 106, and the sand temperature measuring device 108. It is preferable. The compactability value (CB value) measuring device 112 is provided in the vicinity of the driving roller 90, similarly to the moisture measuring device 106 and the sand temperature measuring device 108, and the CB value and moisture content of the mold sand 22 on the belt conveyor 20. The quantity and temperature are measured. The sand detection device 104, the compactability value (CB value) measurement device 112, the moisture measurement device 106, and the sand temperature measurement device 108 are connected to the control device, and the detection result and the measurement result are sent to the control device of the molding machine. . Based on the detection result and the measurement result, the molding machine controls molding so that the molding sand 22 supplied from the molding machine sand tank 200 is molded into a mold having a target property.

The sand detection device 104, the compactability value (CB value) measurement device 112, the moisture measurement device 106, and the sand temperature measurement device 108 are connected to the control device, and the detection result and the measurement result are upstream of the mold sand supply device 12. May be sent to a controller of a kneader (not shown) provided in Based on the detection result and the measurement result, the kneader is supplied to the sand tank 200 for the molding machine, that is, the kneading is controlled in the kneader so that the mold sand supplied to the sand hopper 16 has a target property. .

As shown in FIG. 5, a molding machine sand tank 200 is provided on the lower side of the drive roller 90. As shown in FIG. The molding machine sand tank 200 is provided with an opening (not shown) at the top, and the molding sand 22 on the belt conveyor 20 that has moved to the driving roller 90 is supplied into the molding machine sand tank 200 through this opening. The A predetermined amount of mold sand is stored in the sand tank 200 for a molding machine. The predetermined amount is, for example, an amount equivalent to the amount of mold sand for one frame of the molding machine to an amount for several frames. When receiving a signal from the molding machine, the molding machine sand tank 200 opens a shielding means (not shown) provided between the molding machine and the molding machine so that a certain amount (for example, one frame) of molding sand is placed on the molding machine. Supply. When the supply to the molding machine is completed, the molding machine sand tank 200 closes the shielding means, and then the molding machine sand tank 200 from the sand hopper 16 via the belt conveyor 20 until the timing when the molding sand is supplied to the molding machine. Mold sand is supplied until the specified amount is reached.

Even if the continuous kneading apparatus 10 provided with the mold sand supply apparatus 12 is used in a molding machine, the actions and effects described for the kneading machine can be obtained.

The embodiment of the present invention has been described above, but the present invention is not limited to the above, and various modifications other than those described above can be implemented without departing from the spirit of the present invention. Of course.

Hereinafter, main symbols used in this specification and the drawings will be collectively shown.
12 Mold sand supply device 14 Kneader hopper 16 Sand hopper (storage part)
18 Cut gate (opening / closing part)
20 Belt conveyor (supply means)
22 Mold sand 28 Opening 124 Opening 126 Cut gate (opening / closing part)
142 Kneading machine hopper 200 Sand tank for molding machine

Claims

While storing mold sand inside, the storage part which has an opening which connects inside and outside,
An opening / closing part that is provided in the opening of the storage part and opens and closes the opening;
A supply means that is operated to supply the molding sand to the outside from the opening of the storage unit, and that operates for a predetermined time after the opening and closing unit closes the opening;
Mold sand feeding device having.
The supply means is supplying the mold sand to a kneader for kneading the mold sand from the opening of the reservoir.
The molding sand supply apparatus according to claim 1.
The opening, the opening / closing part, and the kneader are provided as a pair across the storage part,
The supply means supplies mold sand to the pair of kneaders from the opening,
The molding sand supply apparatus according to claim 2.
The supply means supplies the molding sand to a molding machine that molds a mold using the molding sand from the opening of the storage unit.
The molding sand supply apparatus according to claim 1.