WO2017199488A1 - Method and device for supplying casting sand to sand hopper - Google Patents

Method and device for supplying casting sand to sand hopper Download PDF

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Publication number
WO2017199488A1
WO2017199488A1 PCT/JP2017/004914 JP2017004914W WO2017199488A1 WO 2017199488 A1 WO2017199488 A1 WO 2017199488A1 JP 2017004914 W JP2017004914 W JP 2017004914W WO 2017199488 A1 WO2017199488 A1 WO 2017199488A1
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Prior art keywords
sand
hopper
sand hopper
foundry
molding
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PCT/JP2017/004914
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French (fr)
Japanese (ja)
Inventor
信幸 河合
山口　広
剛大 杉野
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新東工業株式会社
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Priority to JP2018518082A priority Critical patent/JPWO2017199488A1/en
Priority to CN201780002953.3A priority patent/CN107921525A/en
Publication of WO2017199488A1 publication Critical patent/WO2017199488A1/en

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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B22—CASTING; POWDER METALLURGY
    • B22C—FOUNDRY MOULDING
    • B22C5/00—Machines or devices specially designed for dressing or handling the mould material so far as specially adapted for that purpose
    • B22C5/14—Equipment for storing or handling the dressed mould material, forming part of a plant for preparing such material
    • B22C5/16—Equipment for storing or handling the dressed mould material, forming part of a plant for preparing such material with conveyors or other equipment for feeding the material

Definitions

  • the present invention relates to a method and apparatus for supplying foundry sand to a sand hopper for foundry sand supplied to a mold making machine.
  • a sand hopper is used to temporarily store the foundry sand after kneading the foundry sand supplied to the mold making machine with a kneader.
  • the sand hopper is provided with a level switch as means for detecting foundry sand as disclosed in Patent Document 1.
  • This level switch is installed for the purpose of supplying the foundry sand to the sand hopper when the foundry sand amount falls below a predetermined amount, for example.
  • the level switch only knows whether or not there is sand at the place where it was installed, and could not continuously grasp the total amount of sand in the sand hopper. For this reason, when performing control according to the amount of sand in the sand hopper, a plurality of level switches must be used, and there is a problem that the labor for adjusting the mounting position is further increased.
  • the object of the present invention is to easily adjust the sand hopper's foundry sand detecting means, and to detect the total amount of sand in the sand hopper by this detecting means and to control the supply of the foundry sand. It is an object to provide a method and apparatus for supplying foundry sand to a sand hopper, which can eliminate waste.
  • the casting sand supply method to the sand hopper of the present invention made to solve the above problems is provided in the sand hopper in the sand hopper for storing the casting sand adjusted to be supplied to the molding machine.
  • the amount of foundry sand in the sand hopper is detected by a laser sensor, and when the detected result falls below a set lower limit value, the foundry sand is supplied to the sand hopper.
  • the amount of foundry sand in the sand hopper is detected by a laser sensor, and when the detection result falls below a set lower limit value, the molding quantity data up to the end time is obtained.
  • the sand found necessary for the remaining molding quantity is supplied to the sand hopper.
  • the casting sand supply device to the sand hopper of the present invention includes a kneader for adjusting the casting sand supplied to the molding machine, a sand hopper for storing the casting sand, a laser sensor provided in the sand hopper, and a laser sensor.
  • the amount of foundry sand in the sand hopper is detected by a laser sensor, and when the detection result falls below the set lower limit value, the molding quantity data up to the closing time is received from the molding machine, and the molding until the closing time is received.
  • the quantity data is equal to or less than the reference quantity, it further includes an arithmetic unit that calculates the amount of foundry sand required for the remaining molding quantity and controls to supply the required amount of foundry sand to the sand hopper. It is a feature.
  • Such a configuration makes it possible to store only the necessary amount of sand up to the end time in the sand hopper, and the work can be completed without leaving the kneaded cast sand. As a result, there is an advantage that it is not necessary to consume extra energy.
  • the casting sand supply device to the sand hopper is arranged so that a plurality of laser sensors provided in the sand hopper are aligned in the traveling direction of the belt feeder across the casting sand inlet provided in the top plate of the sand hopper. It is provided in the board.
  • the apparatus for supplying the foundry sand to the sand hopper is characterized in that a vibrator is provided in the sand hopper.
  • the shelves can be eliminated by vibrating the sand hopper with a vibrator.
  • the present invention it is possible to easily detect the sand volume of the sand hopper by using the laser sensor. For this reason, the condition for supplying the foundry sand into the sand hopper can be easily performed only by changing the set value, and adjustment of the mounting position of the laser sensor is not necessary. Further, by using the laser sensor, it is possible to control the supply of fine foundry sand and to eliminate waste.
  • FIG. 3 is a cross-sectional view taken along the line AA shown in FIG. 2, where (A) shows a case where there are two laser sensors, and (B) shows a case where there are four laser sensors. It is a fragmentary sectional front view which shows typically the modification of the foundry sand supply apparatus to the sand hopper in this invention.
  • a sand hopper 11 is provided as a temporary place for storing foundry sand.
  • the foundry sand is adjusted by the kneader 16 and then fed into the sand hopper 11 by the belt conveyor 13.
  • the foundry sand 17 stored in the sand hopper 11 is discharged from the sand hopper 11 by the belt feeder 14 in accordance with the molding timing of the molding machine 15 and is put into the molding machine 15.
  • the shape of the sand hopper 11 is not particularly limited, but it is preferable that the horizontal cross-sectional shape is circular or rectangular.
  • the sand hopper 11 has a top plate 19 at an upper portion, and a casting sand inlet 18 is formed at the center (see FIG. 3).
  • the foundry sand thrown in from the foundry sand inlet 18 is generally deposited in the sand hopper 11 in a shape having a high central portion and a low periphery (see FIG. 2).
  • a laser sensor 12 is provided on the top of the sand hopper 11, and the linear distance from the position of the laser sensor 12 to the position of the surface of the foundry sand 17 stored in the sand hopper 11 is measured. can do. Since the amount of foundry sand can be estimated from this measured value, a signal is transmitted to the kneader 16 when the laser sensor 12 falls below a predetermined value set in advance, and the sand from the kneader 16 via the belt conveyor 13 is transmitted. Foundry sand is supplied to the hopper 11.
  • the laser sensor 12 may include a control system.
  • FIG. 3 shows the mounting position of the laser sensor 12 of this apparatus.
  • the mounting position of the laser sensor 12 is on the downstream side (12a) and the upstream side (12b) of the belt feeder 14 in the traveling direction across the casting sand inlet 18 provided at the center of the top plate 19 of the sand hopper 11.
  • Each one (FIG. 3A) or two each (FIG. 3B) is arranged so as to be parallel to the traveling direction of the belt feeder 14. Since the laser sensor 12 is disposed on the downstream side and the upstream side in the traveling direction of the belt feeder 14 with the foundry sand inlet 18 interposed therebetween, the height of the foundry sand 17 on both sides sandwiching the apex of the accumulated foundry sand 17. Can be measured.
  • the height may be different between the downstream side and the upstream side in the carrying-out direction. Even in that case, the accuracy of estimation of the amount of foundry sand 17 can be improved by measuring on both sides.
  • the laser sensor 12 is not necessarily parallel to the traveling direction of the belt feeder 14, but may be arranged side by side in the traveling direction.
  • a signal is transmitted to the kneader 16, and the belt conveyor 13 is moved from the kneader 16. It is preferable to control the foundry sand to be supplied to the sand hopper 11 via the route.
  • a signal may be transmitted when only one of the laser sensors 12 falls below a predetermined value, or a signal may be transmitted when the sum of measured values of all the laser sensors 12 falls below a predetermined value.
  • the laser sensor 12 when the amount of foundry sand in the sand hopper 11 reaches the reference upper limit amount, or even when the upper limit amount is abnormal or the abnormal lower limit amount, the device is not increased like a level switch. It becomes possible to respond. For this reason, the cost concerning an apparatus and the effort of attachment adjustment can be saved.
  • the mounting position in that case is preferably a position close to the foundry sand inlet 18.
  • FIG. 4 shows a modification of the present invention.
  • the laser sensor 12 provided on the top plate of the sand hopper 11 measures the linear distance from the position of the laser sensor 12 to the position of the surface of the foundry sand 17 stored in the sand hopper 11, and calculates these measured values.
  • the computing device 21 computes the average value of measured values, for example, and estimates the amount of foundry sand.
  • the molding quantity data transmitted from the molding machine 15 to the computing device 21 up to the end time is received from the molding machine 15.
  • the foundry sand is supplied to the sand hopper 11.
  • the molding sand necessary for the remaining molding up to the closing time is calculated, and the casting is sent to the sand hopper 11.
  • a predetermined amount of foundry sand is supplied to the sand hopper 11.
  • the predetermined amount is, for example, an amount of foundry sand for filling the sand hopper 11.
  • the arithmetic device 21 may be included in a control device (not shown) such as a molding sand supply device, a molding machine, or a molding unit combining these.
  • the present invention it is possible to easily detect the sand volume of the sand hopper by using the laser sensor. For this reason, the condition for supplying the foundry sand into the sand hopper can be easily performed only by changing the set value, and adjustment of the mounting position of the laser sensor is not necessary. Further, by using the laser sensor, it is possible to control the supply of fine foundry sand and to eliminate waste.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Casting Devices For Molds (AREA)

Abstract

Provided are a method and device for supplying casting sand to a sand hopper (11), whereby attachment of a means for sensing casting sand (17) to the sand hopper (11) can easily be adjusted, and waste can be reduced by controlling the supplying of casting sand through use of the sensing means. This method and device for supplying casting sand to a sand hopper (11) comprises sensing the amount of casting sand (17) in the sand hopper through use of a laser sensor (12) provided to the sand hopper (11), and supplying casting sand to the sand hopper (11) when the sensing result is below a set lower-limit value.

Description

サンドホッパーへの鋳物砂供給方法およびその装置Method and apparatus for supplying foundry sand to sand hopper
　本発明は、鋳型造型機に供給する鋳物砂用サンドホッパーへの鋳物砂供給方法およびその装置に関するものである。 The present invention relates to a method and apparatus for supplying foundry sand to a sand hopper for foundry sand supplied to a mold making machine.
　鋳型造型機に供給する鋳物砂を混練機で混練した後にその鋳物砂を一時的に貯留しておくためにサンドホッパーが用いられる。 A sand hopper is used to temporarily store the foundry sand after kneading the foundry sand supplied to the mold making machine with a kneader.
　このサンドホッパーには、特許文献１に示すように鋳物砂の検知手段としてレベルスイッチが設けられている。このレベルスイッチは、例えば、鋳物砂量が所定量を下回った場合に、鋳物砂をサンドホッパーへ供給することを目的に設置されている。しかしながら、レベルスイッチは、客先ごとの砂性状等により取り付け位置を調整する必要があり、非常に手間のかかる作業であった。また、レベルスイッチは、その設置した場所に砂があるかどうかがわかるだけであり、サンドホッパー内の砂量の全体量を連続的に把握することはできなかった。このため、サンドホッパー内の砂量に応じて制御を行う場合には複数のレベルスイッチを用いなければならず、取り付け位置を調整する手間がさらに増えてしまう問題点があった。 The sand hopper is provided with a level switch as means for detecting foundry sand as disclosed in Patent Document 1. This level switch is installed for the purpose of supplying the foundry sand to the sand hopper when the foundry sand amount falls below a predetermined amount, for example. However, it is necessary to adjust the mounting position of the level switch depending on the sand property or the like for each customer. Further, the level switch only knows whether or not there is sand at the place where it was installed, and could not continuously grasp the total amount of sand in the sand hopper. For this reason, when performing control according to the amount of sand in the sand hopper, a plurality of level switches must be used, and there is a problem that the labor for adjusting the mounting position is further increased.
　本発明の目的は、サンドホッパーの鋳物砂の検知手段の取り付け調整を容易に行うことができ、この検知手段によりサンドホッパー内の砂量の全体量を把握し、鋳物砂の供給制御を行うことにより無駄を省くことができる、サンドホッパーへの鋳物砂供給方法およびその装置を提供することである。 The object of the present invention is to easily adjust the sand hopper's foundry sand detecting means, and to detect the total amount of sand in the sand hopper by this detecting means and to control the supply of the foundry sand. It is an object to provide a method and apparatus for supplying foundry sand to a sand hopper, which can eliminate waste.
特開昭５７－１９５５５７号公報JP-A-57-195557
　上記の課題を解決するためになされた本発明のサンドホッパーへの鋳物砂供給方法は、造型機に供給されるために調整された鋳物砂を貯留するためのサンドホッパーにおいて、サンドホッパーに設けられたレーザーセンサーにより、サンドホッパー内の鋳物砂の量を検知し、その検知結果が設定された下限値を下回った時に、鋳物砂をサンドホッパーへ供給することを特徴とするものである。 The casting sand supply method to the sand hopper of the present invention made to solve the above problems is provided in the sand hopper in the sand hopper for storing the casting sand adjusted to be supplied to the molding machine. The amount of foundry sand in the sand hopper is detected by a laser sensor, and when the detected result falls below a set lower limit value, the foundry sand is supplied to the sand hopper.
　サンドホッパーの鋳物砂の検知手段としてレーザーセンサーを用いることで、サンドホッパー内の鋳物砂量を連続的に検知することが可能となる。そのため、その検知結果の比較対象となる下限値を変更するだけで、サンドホッパー内への鋳物砂の供給条件を変更でき、レーザーセンサーの取付位置の調整は不要となる。 It is possible to continuously detect the amount of foundry sand in the sand hopper by using a laser sensor as a means for detecting foundry sand in the sand hopper. Therefore, the supply condition of the foundry sand into the sand hopper can be changed only by changing the lower limit value to be compared with the detection result, and adjustment of the mounting position of the laser sensor becomes unnecessary.
　好ましくは、サンドホッパーへの鋳物砂供給方法は、レーザーセンサーによりサンドホッパー内の鋳物砂の量を検知し、その検知結果が設定された下限値を下回った時に、終業時間までの造型数量データを造型機から受取り、終業時間までの造型数量データが基準数量以下の場合には、前記サンドホッパーへ残りの造型数量に必要な鋳物砂を供給することを特徴とするものである。 Preferably, in the method for supplying the foundry sand to the sand hopper, the amount of foundry sand in the sand hopper is detected by a laser sensor, and when the detection result falls below a set lower limit value, the molding quantity data up to the end time is obtained. When molding data received from the molding machine and the molding quantity data up to the end of work time is below the reference quantity, the sand found necessary for the remaining molding quantity is supplied to the sand hopper.
　このような制御により、終業時間までの必要な砂量のみをサンドホッパー内に貯留しておくことが可能となり、混練した鋳物砂を余らせることなく作業を終了させることができる。これにより、余分なエネルギーを消費しなくて済むメリットがある。 Such control makes it possible to store only the necessary amount of sand up to the end of work hours in the sand hopper, and the work can be completed without leaving excessive kneaded foundry sand. As a result, there is an advantage that it is not necessary to consume extra energy.
　本発明のサンドホッパーへの鋳物砂供給装置は、造型機に供給する鋳物砂を調整する混練機と、鋳物砂を貯留するためのサンドホッパーと、サンドホッパーに設けられたレーザーセンサーと、レーザーセンサーからの信号に基づきサンドホッパーに鋳物砂を供給するベルトコンベヤと、サンドホッパーから造型機に鋳物砂を供給するベルトフィーダ、とを備えることを特徴とするものである。 The casting sand supply device to the sand hopper of the present invention includes a kneader for adjusting the casting sand supplied to the molding machine, a sand hopper for storing the casting sand, a laser sensor provided in the sand hopper, and a laser sensor. A belt conveyor for supplying foundry sand to the sand hopper based on a signal from the sand hopper, and a belt feeder for supplying foundry sand to the molding machine from the sand hopper.
　検知手段としてレーザーセンサーを用いることで、随時サンドホッパーの鋳物砂量を把握することができる。このため、レベルスイッチのように取付位置の調整は不要となる。 By using a laser sensor as the detection means, it is possible to grasp the sand volume of the sand hopper as needed. For this reason, adjustment of an attachment position becomes unnecessary like a level switch.
　好ましくは、レーザーセンサーによりサンドホッパー内の鋳物砂の量を検知し、その検知結果が設定された下限値を下回った時に、終業時間までの造型数量データを造型機から受取り、終業時間までの造型数量データが基準数量以下の場合には、残りの造型数量に必要な鋳物砂の量を計算し、前記サンドホッパーへ必要な量の鋳物砂を供給するように制御する演算装置をさらに備えることを特徴とするものである。 Preferably, the amount of foundry sand in the sand hopper is detected by a laser sensor, and when the detection result falls below the set lower limit value, the molding quantity data up to the closing time is received from the molding machine, and the molding until the closing time is received. When the quantity data is equal to or less than the reference quantity, it further includes an arithmetic unit that calculates the amount of foundry sand required for the remaining molding quantity and controls to supply the required amount of foundry sand to the sand hopper. It is a feature.
　このような構成により、終業時間までの必要な砂量のみをサンドホッパー内に貯留しておくことが可能となり、混練した鋳物砂を余らせることなく作業を終了させることができる。これにより、余分なエネルギーを消費しなくて済むメリットがある。 Such a configuration makes it possible to store only the necessary amount of sand up to the end time in the sand hopper, and the work can be completed without leaving the kneaded cast sand. As a result, there is an advantage that it is not necessary to consume extra energy.
　好ましくは、サンドホッパーへの鋳物砂供給装置は、サンドホッパーに設けられた複数のレーザーセンサーが、サンドホッパーの天板に設けられた鋳物砂投入口を挟んでベルトフィーダの進行方向に並ぶよう天板に設けられていることを特徴とするものである。 Preferably, the casting sand supply device to the sand hopper is arranged so that a plurality of laser sensors provided in the sand hopper are aligned in the traveling direction of the belt feeder across the casting sand inlet provided in the top plate of the sand hopper. It is provided in the board.
　ベルトフィーダの動きにより発生するサンドホッパー内の鋳物砂の状態の変化を、鋳物砂の投入口を挟んでベルトフィーダの進行方向に並んで設けられているレーザーセンサーで検知することにより、サンドホッパー内の鋳物砂の量をより正確に検知することができる。 By detecting the change in the state of the foundry sand in the sand hopper caused by the movement of the belt feeder with the laser sensor arranged in the direction of the belt feeder across the casting sand inlet, The amount of foundry sand can be detected more accurately.
　また、好ましくは、サンドホッパーへの鋳物砂供給装置は、サンドホッパーにバイブレータが設けられたことを特徴とするものである。 Also preferably, the apparatus for supplying the foundry sand to the sand hopper is characterized in that a vibrator is provided in the sand hopper.
　サンドホッパーに棚吊りが発生した場合には、バイブレータによりサンドホッパーを振動させて棚吊りを解消できる。 When shelves occur in the sand hopper, the shelves can be eliminated by vibrating the sand hopper with a vibrator.
　以上のように本発明によれば、レーザーセンサーを用いることでサンドホッパーの鋳物砂量の検知を容易に行うことができる。このため、サンドホッパー内への鋳物砂の供給条件は設定値を変更するだけで容易に行うことができ、レーザーセンサーの取付位置の調整は不要となる。また、レーザーセンサーを用いることで、きめ細かい鋳物砂の供給制御を行うことができ、無駄を省くことができる。 As described above, according to the present invention, it is possible to easily detect the sand volume of the sand hopper by using the laser sensor. For this reason, the condition for supplying the foundry sand into the sand hopper can be easily performed only by changing the set value, and adjustment of the mounting position of the laser sensor is not necessary. Further, by using the laser sensor, it is possible to control the supply of fine foundry sand and to eliminate waste.
　この出願は、日本国で２０１６年５月１９日に出願された特願２０１６－１００４７１号に基づいており、その内容は本出願の内容として、その一部を形成する。
　また、本発明は以下の詳細な説明により更に完全に理解できるであろう。しかしながら、詳細な説明および特定の実施例は、本発明の望ましい実施の形態であり、説明の目的のためにのみ記載されているものである。この詳細な説明から、種々の変更、改変が、当業者にとって明らかだからである。
　出願人は、記載された実施の形態のいずれをも公衆に献上する意図はなく、開示された改変、代替案のうち、特許請求の範囲内に文言上含まれないかもしれないものも、均等論下での発明の一部とする。
　本明細書あるいは請求の範囲の記載において、名詞及び同様な指示語の使用は、特に指示されない限り、または文脈によって明瞭に否定されない限り、単数および複数の両方を含むものと解釈すべきである。本明細書中で提供されたいずれの例示または例示的な用語（例えば、「等」）の使用も、単に本発明を説明し易くするという意図であるに過ぎず、特に請求の範囲に記載しない限り本発明の範囲に制限を加えるものではない。 This application is based on Japanese Patent Application No. 2016-100471 filed on May 19, 2016 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.
本発明におけるサンドホッパーへの鋳物砂供給装置および造型機の配置状態を示す正面図である。It is a front view which shows the arrangement | positioning state of the molding sand supply apparatus to the sand hopper in this invention, and a molding machine. 本発明におけるサンドホッパーへの鋳物砂供給装置を模式的に示す部分断面正面図である。It is a partial section front view showing typically a foundry sand supply device to a sand hopper in the present invention. 図２に示すＡ－Ａ断面図であり、（Ａ）はレーザーセンサーが２個の場合を、（Ｂ）はレーザーセンサーが４個の場合を示す。FIG. 3 is a cross-sectional view taken along the line AA shown in FIG. 2, where (A) shows a case where there are two laser sensors, and (B) shows a case where there are four laser sensors. 本発明におけるサンドホッパーへの鋳物砂供給装置の変形例を模式的に示す部分断面正面図である。It is a fragmentary sectional front view which shows typically the modification of the foundry sand supply apparatus to the sand hopper in this invention.
　以下に図面を参照しつつ、本発明の実施形態を説明する。
　図１及び２に示すように、造型機１５へ鋳物砂を供給するために、一時的な鋳物砂の貯留場所としてサンドホッパー１１が設けられている。鋳物砂は、混練機１６により調整を行った後、ベルトコンベア１３によりサンドホッパー１１内に投入される。サンドホッパー１１内に貯留された鋳物砂１７は、ベルトフィーダ１４により、造型機１５による造型のタイミングに合わせてサンドホッパー１１より排出され、造型機１５に投入される。サンドホッパー１１の形状は、特に限定されないが、水平断面形状が円形または矩形出ることが好ましい。サンドホッパー１１は、上部に天板１９を有し、中央に鋳物砂投入口１８が形成される（図３参照）。鋳物砂投入口１８から投入された鋳物砂は、サンドホッパー１１内で、中央部が高く周囲が低くなった形状で堆積するのが一般的である（図２参照）。 Embodiments of the present invention will be described below with reference to the drawings.
As shown in FIGS. 1 and 2, in order to supply foundry sand to the molding machine 15, a sand hopper 11 is provided as a temporary place for storing foundry sand. The foundry sand is adjusted by the kneader 16 and then fed into the sand hopper 11 by the belt conveyor 13. The foundry sand 17 stored in the sand hopper 11 is discharged from the sand hopper 11 by the belt feeder 14 in accordance with the molding timing of the molding machine 15 and is put into the molding machine 15. The shape of the sand hopper 11 is not particularly limited, but it is preferable that the horizontal cross-sectional shape is circular or rectangular. The sand hopper 11 has a top plate 19 at an upper portion, and a casting sand inlet 18 is formed at the center (see FIG. 3). The foundry sand thrown in from the foundry sand inlet 18 is generally deposited in the sand hopper 11 in a shape having a high central portion and a low periphery (see FIG. 2).
　図２に示すように、サンドホッパー１１の上部にはレーザーセンサー１２が設けられており、レーザーセンサー１２の位置からサンドホッパー１１内に貯留された鋳物砂１７の表面の位置までの直線距離を測定することができる。この測定値により鋳物砂量を推定することができるため、レーザーセンサー１２に予め設定した所定値を下回った時に、混練機１６へ信号を発信し、混練機１６からベルトコンベア１３を経由してサンドホッパー１１へ鋳物砂が供給される。なお、レーザーセンサー１２には、制御系を含めてもよい。 As shown in FIG. 2, a laser sensor 12 is provided on the top of the sand hopper 11, and the linear distance from the position of the laser sensor 12 to the position of the surface of the foundry sand 17 stored in the sand hopper 11 is measured. can do. Since the amount of foundry sand can be estimated from this measured value, a signal is transmitted to the kneader 16 when the laser sensor 12 falls below a predetermined value set in advance, and the sand from the kneader 16 via the belt conveyor 13 is transmitted. Foundry sand is supplied to the hopper 11. The laser sensor 12 may include a control system.
　図３は、この装置のレーザーセンサー１２の取付位置を示したものである。レーザーセンサー１２の取付位置は、サンドホッパー１１の天板１９の中央に設けられた鋳物砂投入口１８を挟んで、ベルトフィーダ１４の進行方向の下流側（１２ａ）と、上流側（１２ｂ）に、各１個ずつ（図３の（Ａ））、もしくは各２個ずつ（図３の（Ｂ））、ベルトフィーダ１４の進行方向と平行になるように配置されている。レーザーセンサー１２が鋳物砂投入口１８を挟んで、ベルトフィーダ１４の進行方向の下流側と上流側に配置されることにより、堆積した鋳物砂１７の頂点を挟んだ両側で鋳物砂１７の高さを測定することができる。鋳物砂１７はベルトフィーダ１４により搬出されるので、搬出方向の下流側と上流側で高さが異なることがある。その場合にも、両側で測定することにより、鋳物砂１７の量の推定の精度を上げることができる。なお、レーザーセンサー１２は、必ずしもベルトフィーダ１４の進行方向と平行でなくても、進行方向に並んで配置されるのがよい。 FIG. 3 shows the mounting position of the laser sensor 12 of this apparatus. The mounting position of the laser sensor 12 is on the downstream side (12a) and the upstream side (12b) of the belt feeder 14 in the traveling direction across the casting sand inlet 18 provided at the center of the top plate 19 of the sand hopper 11. Each one (FIG. 3A) or two each (FIG. 3B) is arranged so as to be parallel to the traveling direction of the belt feeder 14. Since the laser sensor 12 is disposed on the downstream side and the upstream side in the traveling direction of the belt feeder 14 with the foundry sand inlet 18 interposed therebetween, the height of the foundry sand 17 on both sides sandwiching the apex of the accumulated foundry sand 17. Can be measured. Since the foundry sand 17 is carried out by the belt feeder 14, the height may be different between the downstream side and the upstream side in the carrying-out direction. Even in that case, the accuracy of estimation of the amount of foundry sand 17 can be improved by measuring on both sides. Note that the laser sensor 12 is not necessarily parallel to the traveling direction of the belt feeder 14, but may be arranged side by side in the traveling direction.
　レーザーセンサー１２が２個の場合、及び、４個の場合とも、全てのレーザーセンサー１２が予め設定した所定値を下回った時に、混練機１６へ信号を発信し、混練機１６からベルトコンベア１３を経由してサンドホッパー１１へ鋳物砂が供給される制御をするのがよい。なお、片方だけが所定値を下回った時に信号を発信しても、全てのレーザーセンサー１２での測定値の和が所定値を下回った時に信号を発信してもよい。 When the number of laser sensors 12 is two or four, when all the laser sensors 12 are below a predetermined value set in advance, a signal is transmitted to the kneader 16, and the belt conveyor 13 is moved from the kneader 16. It is preferable to control the foundry sand to be supplied to the sand hopper 11 via the route. A signal may be transmitted when only one of the laser sensors 12 falls below a predetermined value, or a signal may be transmitted when the sum of measured values of all the laser sensors 12 falls below a predetermined value.
　なお、レーザーセンサー１２を用いることで、サンドホッパー１１内の鋳物砂量が基準の上限量に達した場合や異常な上限量や異常な下限量にも、レベルスイッチのように装置を増やすことなく対応することが可能となる。このため、装置にかかるコストや取付け調整の手間を省くことができる。 In addition, by using the laser sensor 12, when the amount of foundry sand in the sand hopper 11 reaches the reference upper limit amount, or even when the upper limit amount is abnormal or the abnormal lower limit amount, the device is not increased like a level switch. It becomes possible to respond. For this reason, the cost concerning an apparatus and the effort of attachment adjustment can be saved.
　図２や図３の例に限らず、例えばレーザーセンサー１２が１個の場合においても、測定精度は落ちるが、用いることができる。その場合の取付位置は鋳物砂投入口１８に近い位置が好ましい。 2 and 3 are not limited to the example of FIG. 2 and FIG. 3, for example, even when the number of laser sensors 12 is one, the measurement accuracy is lowered, but it can be used. The mounting position in that case is preferably a position close to the foundry sand inlet 18.
　図４は、本発明における変形例を示したものである。サンドホッパー１１の天板に設けられたレーザーセンサー１２により、レーザーセンサー１２の位置からサンドホッパー１１内に貯留された鋳物砂１７の表面の位置までの直線距離を測定し、これら測定値を演算装置２１へ送信する。演算装置２１は、例えば測定値の平均値を演算して、鋳物砂量を推定する。また、別途、造型機１５から演算装置２１に送信される、終業時間までの造型数量データを造型機１５より受取る。そして、推定した鋳物砂量が演算装置２１に予め設定された所定値を下回ったと判断された場合には、サンドホッパー１１に鋳物砂を供給する。この際に、終業時間までの造型数量データが予め演算装置２１に設定された基準数量以下の場合には、終業時間までの残りの造型に必要な鋳物砂を計算し、サンドホッパー１１にその鋳物砂量を供給する。終業時間までの造型数量データが予め演算装置２１に設定された基準数量より多い場合には、所定量の鋳物砂をサンドホッパー１１に供給する。ここで、所定量とは、例えばサンドホッパー１１を満杯にするための鋳物砂量である。なお、演算装置２１は、鋳物砂供給装置、造型機、これらを合わせた造型ユニット等の制御装置（不図示）に含まれていてもよい。 FIG. 4 shows a modification of the present invention. The laser sensor 12 provided on the top plate of the sand hopper 11 measures the linear distance from the position of the laser sensor 12 to the position of the surface of the foundry sand 17 stored in the sand hopper 11, and calculates these measured values. To 21. The computing device 21 computes the average value of measured values, for example, and estimates the amount of foundry sand. Separately, the molding quantity data transmitted from the molding machine 15 to the computing device 21 up to the end time is received from the molding machine 15. When it is determined that the estimated amount of foundry sand has fallen below a predetermined value preset in the computing device 21, the foundry sand is supplied to the sand hopper 11. At this time, if the molding quantity data up to the closing time is equal to or less than the reference quantity set in the arithmetic unit 21 in advance, the molding sand necessary for the remaining molding up to the closing time is calculated, and the casting is sent to the sand hopper 11. Supply the amount of sand. When the molding quantity data up to the end time is larger than the reference quantity set in advance in the arithmetic unit 21, a predetermined amount of foundry sand is supplied to the sand hopper 11. Here, the predetermined amount is, for example, an amount of foundry sand for filling the sand hopper 11. Note that the arithmetic device 21 may be included in a control device (not shown) such as a molding sand supply device, a molding machine, or a molding unit combining these.
　なお、図２や図４のように、サンドホッパー１１の側面にバイブレータ３１を設けることにより、サンドホッパー１１内で棚吊りが発生した場合には、バイブレータ３１でサンドホッパー１１内の鋳物砂１７に振動を与えることにより棚吊りを解消できる。 As shown in FIG. 2 and FIG. 4, when the vibrator 31 is provided on the side surface of the sand hopper 11, when shelf hanging occurs in the sand hopper 11, the vibrator 31 forms the casting sand 17 in the sand hopper 11. Shelf suspension can be eliminated by applying vibration.
　このように本発明によれば、レーザーセンサーを用いることでサンドホッパーの鋳物砂量の検知を容易に行うことができる。このため、サンドホッパー内への鋳物砂の供給条件は設定値を変更するだけで容易に行うことができ、レーザーセンサーの取付位置の調整は不要となる。また、レーザーセンサーを用いることで、きめ細かい鋳物砂の供給制御を行うことができ、無駄を省くことができる。 As described above, according to the present invention, it is possible to easily detect the sand volume of the sand hopper by using the laser sensor. For this reason, the condition for supplying the foundry sand into the sand hopper can be easily performed only by changing the set value, and adjustment of the mounting position of the laser sensor is not necessary. Further, by using the laser sensor, it is possible to control the supply of fine foundry sand and to eliminate waste.
　以下、本明細書及び図面で用いた主な符号をまとめて示す。
　１１　サンドホッパー
　１２、１２ａ、１２ｂ　レーザーセンサー
　１３　ベルトコンベア
　１４　ベルトフィーダ
　１５　造型機
　１６　混練機
　１７　サンドホッパー内の鋳物砂
　１８　鋳物砂投入口
　１９　天板
　２１　演算装置
　３１　バイブレータ Hereinafter, main symbols used in the present specification and drawings are collectively shown.
DESCRIPTION OF SYMBOLS 11 Sand hopper 12, 12a, 12b Laser sensor 13 Belt conveyor 14 Belt feeder 15 Molding machine 16 Kneading machine 17 Foundry sand in sand hopper 18 Foundry sand inlet 19 Top plate 21 Arithmetic unit 31 Vibrator

Claims (6)

  1. 　造型機に供給されるために調整された鋳物砂を貯留するためのサンドホッパーにおいて、
    　前記サンドホッパーに設けられたレーザーセンサーにより、該サンドホッパー内の鋳物砂の量を検知し、
    　その検知結果が設定された下限値を下回った時に、鋳物砂を該サンドホッパーへ供給することを特徴とする、
    　サンドホッパーへの鋳物砂供給方法。     In a sand hopper for storing casting sand adjusted to be supplied to a molding machine,
    A laser sensor provided in the sand hopper detects the amount of foundry sand in the sand hopper,
    When the detection result falls below a set lower limit value, the foundry sand is supplied to the sand hopper,
    Casting sand supply method to sand hopper.
  2. 　前記レーザーセンサーにより前記サンドホッパー内の鋳物砂の量を検知し、
    　その検知結果が設定された下限値を下回った時に、終業時間までの造型数量データを前記造型機から受取り、終業時間までの造型数量データが基準数量以下の場合には、前記サンドホッパーへ残りの造型数量に必要な鋳物砂を供給することを特徴とする、
    　請求項１に記載のサンドホッパーへの鋳物砂供給方法。     The amount of foundry sand in the sand hopper is detected by the laser sensor,
    When the detection result falls below the set lower limit value, the molding quantity data up to the end time is received from the molding machine, and if the molding quantity data up to the end time is less than the reference quantity, the remaining data is sent to the sand hopper. It is characterized by supplying the foundry sand necessary for molding quantity,
    The casting sand supply method to the sand hopper according to claim 1.
  3. 　造型機に供給する鋳物砂を調整する混練機と、
    　前記鋳物砂を貯留するためのサンドホッパーと、
    　前記サンドホッパーに設けられたレーザーセンサーと、
    　前記レーザーセンサーからの信号に基づき該サンドホッパーに鋳物砂を供給するベルトコンベヤと、
    　前記サンドホッパーから前記造型機に前記鋳物砂を供給するベルトフィーダと、を備えることを特徴とする、
    　サンドホッパーへの鋳物砂供給装置。     A kneader for adjusting foundry sand to be supplied to the molding machine;
    A sand hopper for storing the foundry sand;
    A laser sensor provided in the sand hopper;
    A belt conveyor for supplying foundry sand to the sand hopper based on a signal from the laser sensor;
    A belt feeder for supplying the foundry sand from the sand hopper to the molding machine,
    Casting sand feeder for sand hopper.
  4. 　前記レーザーセンサーにより前記サンドホッパー内の鋳物砂の量を検知し、その検知結果が設定された下限値を下回った時に、終業時間までの造型数量データを前記造型機から受取り、終業時間までの造型数量データが基準数量以下の場合には、残りの造型数量に必要な鋳物砂の量を計算し、前記サンドホッパーへ必要な量の鋳物砂を供給するように制御する演算装置をさらに備える、
    　請求項３に記載のサンドホッパーへの鋳物砂供給装置。     The amount of foundry sand in the sand hopper is detected by the laser sensor, and when the detection result falls below a set lower limit value, the molding quantity data up to the closing time is received from the molding machine, and the molding up to the closing time is received. When the quantity data is equal to or less than the reference quantity, it further includes an arithmetic unit that calculates the amount of foundry sand required for the remaining molding quantity and controls to supply the required amount of foundry sand to the sand hopper.
    The casting sand supply apparatus to the sand hopper according to claim 3.
  5. 　前記サンドホッパーに設けられた複数の前記レーザーセンサーが、該サンドホッパーの天板に設けられた鋳物砂投入口を挟んで、前記ベルトフィーダの進行方向に並ぶよう前記天板に設けられていることを特徴とする、
    　請求項３または４に記載のサンドホッパーへの鋳物砂供給装置。     A plurality of the laser sensors provided on the sand hopper are provided on the top plate so as to be aligned in the traveling direction of the belt feeder across a casting sand input port provided on the top plate of the sand hopper. Characterized by the
    The casting sand supply apparatus to the sand hopper according to claim 3 or 4.
  6. 　前記サンドホッパーにバイブレータが設けられたことを特徴とする、
    請求項３または４に記載のサンドホッパーへの鋳物砂供給装置。     The sand hopper is provided with a vibrator,
    The casting sand supply apparatus to the sand hopper according to claim 3 or 4.
PCT/JP2017/004914 2016-05-19 2017-02-10 Method and device for supplying casting sand to sand hopper WO2017199488A1 (en)

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