JP2023049174A - Measuring and feeding device for granular material - Google Patents

Measuring and feeding device for granular material Download PDF

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JP2023049174A
JP2023049174A JP2021158754A JP2021158754A JP2023049174A JP 2023049174 A JP2023049174 A JP 2023049174A JP 2021158754 A JP2021158754 A JP 2021158754A JP 2021158754 A JP2021158754 A JP 2021158754A JP 2023049174 A JP2023049174 A JP 2023049174A
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granular material
weighing
weighing container
bottom wall
suction
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雅博 森田
Masahiro Morita
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Naniwa Seisakusho KK
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Naniwa Seisakusho KK
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  • Weight Measurement For Supplying Or Discharging Of Specified Amounts Of Material (AREA)

Abstract

To provide a measuring and feeding device capable of measuring a weight of a granular material such as sand at high accuracy and smoothly discharging it from a measuring vessel.SOLUTION: A measuring and feeding device includes: an upward openable measuring vessel 1 that is obtained by integrally forming a bottom wall 11 and a surrounding wall 12; a load cell 3 that supports the measuring vessel for measuring a weight of a granular material G fed from upper feeding machines 5A and 5B to the measuring vessel; a suction pipeline 10 that is inserted into the measuring vessel in non-contact state from above and has a suction opening end 15 so as to be close to the bottom wall; and a vacuum suction device 20 that is connected to the other end of the suction pipeline to suction the granular material under vacuum and feeds the granular material to a kneading machine 23.SELECTED DRAWING: Figure 1

Description

本発明は、鋳造に用いられる粉粒体材料の計量・投入装置に関する。 TECHNICAL FIELD The present invention relates to a weighing and charging device for powdered or granular material used for casting.

従来、この種の粉粒体材料の計量・投入装置としては、特許文献１及び図４に示すような構造のものが、知られている。
即ち、図４に於て、矢印52のように開閉自在な揺動扉（シャッター）51を有する計量容器53が、高所の棟54の上に、ロードセル55，55を介して、配設されていた。 2. Description of the Related Art Conventionally, as this type of powdery-granular material weighing/throwing device, devices having structures as shown in Patent Document 1 and FIG. 4 are known.
That is, in FIG. 4, a weighing container 53 having a swing door (shutter) 51 that can be freely opened and closed as indicated by an arrow 52 is arranged on a high ridge 54 via load cells 55,55. was

この計量容器53に対して、上方から種類の異なる砂等の粉粒体材料を投入機56，57が配設されている。
さらに、揺動扉51の矢印52方向の開閉作動のためのエアーシリンダ58が設けられていた。揺動扉51の下方には、混練機59が配設され、揺動扉51がエアーシリンダ58で開放されると、粉粒体材料Ｇは混練機59へ投入されて、混練される。 Into this weighing container 53, feeders 56 and 57 are arranged from above for powdery or granular material such as sand of different types.
Further, an air cylinder 58 is provided for opening and closing the swing door 51 in the arrow 52 direction. A kneader 59 is provided below the swing door 51, and when the swing door 51 is opened by an air cylinder 58, the granular material G is introduced into the kneader 59 and kneaded.

特開２０２１－８１３２２号公報Japanese Unexamined Patent Application Publication No. 2021-81322

しかしながら、上述のような構造の計量・投入装置では、次のような問題（欠点）があった。即ち、ロードセル55，55にて支持される計量容器53には、重量の大きい揺動扉51が付設され、さらに、重いエアーシリンダ58が取付けられているので、ロードセル55としては、大重量用のものを使用する必要がある。また、エアーシリンダ58の上端は、（図４に示す）棟54側にではなく、一般的に、計量容器53側に枢着されている場合も多い。その場合は、エアーシリンダ58の「全重量」がロードセル55に付加されるために、ロードセル55としては、大重量用のものを使用する必要がある。大重量用ロードセル55では、粉粒体材料自体の重量に関して計測精度が「低い」という問題と高価なロードセルを揃えなければならないという問題がある。
さらに、計量容器53と投入機56，57が高所（棟54の上）に配設されるので、修理・点検等のメンテナンスも困難だという問題もある。 However, the weighing and charging device having the structure described above has the following problems (demerits). That is, the weighing container 53 supported by the load cells 55, 55 is provided with a heavy swinging door 51 and further with a heavy air cylinder 58 attached thereto. need to use something. Also, the upper end of the air cylinder 58 is often pivotally attached not to the ridge 54 side (shown in FIG. 4) but to the weighing container 53 side in general. In that case, since the "full weight" of the air cylinder 58 is applied to the load cell 55, it is necessary to use a load cell 55 for heavy weight. The large-weight load cell 55 has the problem that the measurement accuracy of the weight of the granular material itself is "low" and the problem that an expensive load cell must be prepared.
Furthermore, since the weighing container 53 and the dispensers 56, 57 are arranged at a high place (above the building 54), there is also the problem that maintenance such as repair and inspection is difficult.

そこで、本発明は、（ｉ）計量容器の重量を著しく軽量化すること、及び、（ii）計量後に粉粒体材料をスムーズに排出することを可能とすること、さらに、(iii）ロードセルとしては、小型で高性能のものを、使用できるようにして、粉粒体材料の重量の計測精度を高めることを、目的とする。 Therefore, the present invention (i) significantly reduces the weight of the weighing container, (ii) enables smooth discharge of the granular material after weighing, and (iii) as a load cell aims to use a compact, high-performance device to improve the accuracy of weighing powdered or granular materials.

本発明は、底壁と周囲壁が一体に形成された上方開口状の計量容器と；該計量容器へ上方の投入機から投入される粉粒体材料の重量を計測するために、上記計量容器を受持するロードセルと；上記計量容器に非接触状態で上方から差込まれて上記底壁に接近状の吸込用開口端を有する吸込配管と；上記吸込配管の他端が連結されて、上記粉粒体材料を真空吸引すると共に、混練機へ、上記粉粒体材料を投入する真空吸引装置とを；具備する。 The present invention provides a weighing container having a bottom wall and a peripheral wall integrally formed with an upward opening; a load cell for supporting; a suction pipe inserted from above in a non-contact state into the weighing container and having a suction opening end close to the bottom wall; the other end of the suction pipe being connected to the a vacuum suction device for vacuum-sucking the powdery or granular material and feeding the powdery or granular material into the kneader;

また、上記粉粒体材料とは、鋳造用の中子，鋳型用の砂、人工砂、カルシウム粉等である。
また、上記計量容器の縦断面形状は、倒立円錐台形状である。
また、上記計量容器の上記底壁の縦断面形状は、弯曲凹状である。
また、上記計量容器をプラスチック製とした。
また、上記計量容器の底壁と、上記吸込配管の吸込用開口端との、間隙寸法を、１０ｍｍ乃至３０ｍｍとした。 Moreover, the above-mentioned powdered or granular materials include cores for casting, sand for molds, artificial sand, calcium powder, and the like.
Moreover, the vertical cross-sectional shape of the weighing container is an inverted truncated cone shape.
Moreover, the vertical cross-sectional shape of the bottom wall of the weighing container is a curved concave shape.
Also, the weighing container is made of plastic.
Also, the size of the gap between the bottom wall of the weighing container and the suction opening end of the suction pipe is set to 10 mm to 30 mm.

計量容器への付属物を省略でき、十分に軽量化を図ることができる。
この軽量化に伴って、ロードセルを小型化して高精度計量も可能となる。さらに、使用するロードセルのコストダウンも図り得ると共に、ロードセル使用の寿命も延びる。また、作業現場の下方の位置に、重量物を設置でき、メンテナンス等の作業も低位置にてやり易くなる。 It is possible to omit attachments to the weighing container, and it is possible to sufficiently reduce the weight.
Along with this weight reduction, the load cell can be made smaller and high-precision weighing becomes possible. Furthermore, the cost of the load cell to be used can be reduced, and the service life of the load cell can be extended. In addition, heavy objects can be installed at the lower position of the work site, and work such as maintenance can be easily performed at the lower position.

本発明の実施の一形態を示す全体構成図である。1 is an overall configuration diagram showing an embodiment of the present invention; FIG. 一実施例の要部断面説明図である。FIG. 3 is a cross-sectional explanatory view of a main part of one embodiment; 他の実施例の要部断面説明図である。FIG. 11 is a cross-sectional explanatory view of a main part of another embodiment; 従来例を示す概略説明図である。It is a schematic explanatory drawing which shows a conventional example.

以下、図示の実施の形態に基づき本発明を詳説する。
図１と図２に示す実施の形態に於て、１は計量容器であって、底壁11と周囲壁12が一体に形成された、上方開口状である。金属製の場合は、底壁11と周囲壁12を溶接やリベット等にて一体化し、あるいは、プレス加工にて一体成形する。
図１と図２にあっては、計量容器１は、その縦断面形状が倒立円錐台形状とした場合を例示する。 BEST MODE FOR CARRYING OUT THE INVENTION The present invention will be described in detail below based on the illustrated embodiments.
In the embodiment shown in FIGS. 1 and 2, reference numeral 1 denotes a weighing container, which has a bottom wall 11 and a peripheral wall 12 integrally formed and which is open at the top. When made of metal, the bottom wall 11 and the surrounding wall 12 are integrated by welding, rivets, or the like, or integrally formed by pressing.
1 and 2 illustrate the case where the vertical cross-sectional shape of the measuring container 1 is an inverted truncated cone shape.

また、図３に示す他の実施例では、計量容器１の底壁11の縦断面形状は弯曲凹状である。具体的には、周囲壁12を円筒型とすると共に、その周囲壁12の下端縁に、縦断面形状が弯曲凹状の底壁11を、連設している。言い換えれば、底壁11は丸鉢形状である。 Further, in another embodiment shown in FIG. 3, the vertical cross-sectional shape of the bottom wall 11 of the weighing container 1 is curved concave. Specifically, the peripheral wall 12 is cylindrical, and a bottom wall 11 having a curved concave vertical cross-section is continuously provided at the lower edge of the peripheral wall 12 . In other words, the bottom wall 11 is bowl-shaped.

そして、３は計量容器１を受持するロードセルである。１個の計量容器１に対して、ロードセル３は、２個～４個が設けられる。また、図１では、計量容器１の上方端外面に付設した外フランジ部４を、平面視円周等分配角度で配置した複数個のロードセル３にて、受持している。
この計量容器１とロードセル３等は、作業現場の床に近いところ───低所───に配置される。 3 is a load cell for receiving the weighing container 1 . Two to four load cells 3 are provided for one weighing container 1 . Further, in FIG. 1, the outer flange portion 4 attached to the outer surface of the upper end of the weighing container 1 is supported by a plurality of load cells 3 arranged at an equal distribution angle around the circumference in a plan view.
The weighing container 1, the load cell 3, and the like are placed near the floor of the work site------- at a low place.

５Ａ，５Ｂは、計量容器１に対して、上方から粉粒体材料を投入する投入機を示す。この投入機５Ａ，５Ｂは、図示省略の支持部材によって、計量容器１の上方に配設されると共に、エアーシリンダ等のアクチュエータ６にて開閉作動するスライド扉７を具備している。 5A and 5B denote input machines for inputting powdery or granular materials into the weighing container 1 from above. The loading machines 5A and 5B are arranged above the weighing container 1 by a support member (not shown) and have a slide door 7 which is opened and closed by an actuator 6 such as an air cylinder.

投入機５Ａ，５Ｂから、各々相違する種類・特性等の粉粒体材料Ｇを、計量容器１へ投入する。
投入機５Ａ，５Ｂから投入される粉粒体材料Ｇの重量は、上記ロードセル３によって、計測される。 Granular materials G of different types and characteristics are charged into the weighing container 1 from the charging machines 5A and 5B.
The weight of the granular material G fed from the feeders 5A and 5B is measured by the load cell 3 described above.

そして、計量容器１に非接触状態で上方から差込まれて、（図１，図２又は図３のように、）底壁11に、所定小寸法（間隙寸法）ΔＨをもって接近状となる吸込用開口端15を、有する吸込配管10を、具備している。
上記小寸法（間隙寸法）ΔＨとしては、１０ｍｍ～３０ｍｍが良い。特に、１５ｍｍ～２５ｍｍが望ましい。 Then, it is inserted into the weighing container 1 from above in a non-contact state, and (as shown in FIGS. 1, 2, or 3) approaches the bottom wall 11 with a predetermined small dimension (gap dimension) ΔH. A suction pipe 10 is provided having an open end 15 for air.
The small dimension (gap dimension) ΔH is preferably 10 mm to 30 mm. In particular, 15 mm to 25 mm is desirable.

図１に示すように、計量容器１の平面視中央に上方から差込まれた吸込配管10の下部及び中間部は、鉛直管部16を形成し、その上端を９０°弯曲させて、水平管部17として、真空吸引装置20に連通連結する。 As shown in FIG. 1, the bottom and middle portions of the suction pipe 10 inserted from above into the center of the weighing container 1 in plan view form a vertical pipe portion 16, the upper end of which is bent 90° to form a horizontal pipe. As part 17, it communicates with a vacuum suction device 20. As shown in FIG.

つまり、吸込配管10の一端21は、計量容器１の底壁11の接近状であり、他端22は、真空吸引装置20に連結される。
この真空吸引装置20から下方の混練機23へ、粉粒体材料Ｇが投入され、次に、この混練機23から、（木型等の内部へエアーによって、粉粒体材料Ｇを吹込むための）吹込機24に粉粒体材料Ｇを投入する。 That is, one end 21 of the suction pipe 10 is close to the bottom wall 11 of the weighing container 1 and the other end 22 is connected to the vacuum suction device 20 .
From this vacuum suction device 20, the granular material G is introduced into a kneader 23 below, and then from this kneader 23 (for blowing the granular material G into the inside of a wooden mold or the like by air). The granular material G is put into the blower 24 .

ところで、粉粒体材料Ｇとは、鋳造用の中子や鋳型に使用する（天然の）砂、人工砂、カルシウム粉等である。
また、計量容器１としては、従来例（図４）のような扉51やシリンダ58が付設されず、また、シリンダ58による大きな外力も作動しないので、薄肉の鋼板でも良く、さらに、軽量のためにアルミニウム等でも良く、場合によっては、プラスチック製とすることも望ましい。 By the way, the granular materials G are (natural) sand, artificial sand, calcium powder, etc. used for casting cores and molds.
Further, the weighing container 1 is not provided with a door 51 and a cylinder 58 as in the conventional example (FIG. 4), and a large external force by the cylinder 58 does not operate. Alternatively, it may be made of aluminum or the like, and in some cases, it is also desirable to use plastic.

ところで、上記真空吸引装置20は、サイクロン（渦巻気流）を発生させて負圧（バキューム）として、下方位置の計量容器１の吸込配管10から粉粒体材料Ｇを、図１の矢印Ｆ10のように吸上げる。なお、矢印Ｆ10のように吸上げることによって、複数種類の材料から構成された粉粒体材料Ｇが相互に混合が進むという利点もある。 By the way, the vacuum suction device 20 generates a cyclone (whirlpool air current) to create a negative pressure (vacuum), and moves the powdery material G from the suction pipe 10 of the weighing container 1 at the lower position to the arrow F10 in FIG. suck it up. It should be noted that there is also the advantage that the powdery granular materials G composed of a plurality of types of materials are mixed with each other by sucking up as indicated by the arrow F10 .

なお、吸込用開口端15の高さ位置で、（Ｚ－Ｚ）線に沿って水平に切断した状態を示した図２（Ｂ），図３（Ｂ）に於て、吸込配管10の孔部面積をＳ10とする。さらに、吸込用開口端15の高さ位置で、吸込配管10の外面と、吸込周囲壁12の内面とによって形成された水平面状円環部30の面積をＳ12とすると、以下の数式１が成立するのが望ましい。
３・Ｓ10≦Ｓ12≦１０・Ｓ10……（数式１）
上記数式１に於て、Ｓ12＜３・Ｓ10では、円環部30にて粉粒体材料Ｇの詰まりを生じ易くなる。逆に、Ｓ12＞１０・Ｓ10では、吸込用開口端15から離れた底壁11の部位に（最終にて）粉粒体材料Ｇが残留してしまう。 2(B) and 3(B) showing the state of horizontal cutting along the (ZZ) line at the height of the suction opening end 15, the hole in the suction pipe 10 Let the area of the part be S10 . Furthermore, if the area of the horizontal annular portion 30 formed by the outer surface of the suction pipe 10 and the inner surface of the surrounding suction wall 12 at the height position of the suction opening end 15 is S12 , the following formula 1 is obtained. Establishment is desirable.
3·S 10 ≦S 12 ≦10·S 10 (Equation 1)
In Equation 1, when S 12 <3·S 10 , clogging of the granular material G tends to occur at the annular portion 30 . Conversely, when S 12 >10·S 10 , the granular material G remains (at the end) on the bottom wall 11 away from the suction opening end 15 .

そして、上下方向の間隙寸法ΔＨを、１０ｍｍ≦ΔＨ≦３０ｍｍに設定したことと合わせることで、計量容器１内の粉粒体材料Ｇを、（底壁11にも残さずに）全て吸引配管10により吸出すことができる。
なお、本発明に於て、投入機５Ａ，５Ｂは、２個の場合を図示したが、これを１個としたり、逆に３個以上とすることも、設計変更自由である。 By setting the vertical gap dimension ΔH to 10 mm ≤ ΔH ≤ 30 mm, all of the powdery material G in the weighing container 1 (without leaving it even on the bottom wall 11) is can be aspirated by
In the present invention, although the case of two loading machines 5A and 5B is illustrated, the number of loading machines may be one, or conversely three or more may be freely changed.

本発明は、以上詳述したように、底壁11と周囲壁12が一体に形成された上方開口状の計量容器１と；該計量容器１へ上方の投入機５Ａ，５Ｂから投入される粉粒体材料Ｇの重量を計測するために、上記計量容器１を受持するロードセル３と；上記計量容器１に非接触状態で上方から差込まれて上記底壁11に接近状の吸込用開口端15を有する吸込配管10と；上記吸込配管10の他端22が連結されて、上記粉粒体材料Ｇを真空吸引すると共に、混練機23へ、上記粉粒体材料Ｇを投入する真空吸引装置20とを；具備する構成であるので、従来の扉51やシリンダ58（図４参照）を省略しても、スムーズに粉粒体材料Ｇを上方へ排出でき、これによって、ロードセル３として小型の高性能かつ高精度のものを、使用可能となり、粉粒体材料Ｇの重量を高精度に計測できる。かつ、ロードセル３について、コストダウンを図り得る。また、計量容器１としては、薄肉鋼板としたり、アルミニウム等の軽金属としたり、プラスチックとすることも可能であり、軽量化とコストダウンを図り得る利点がある。さらに、計量容器１とロードセル３、及び、投入機５Ａ，５Ｂを、工場の低所に設置可能となり、機械の修理・点検も容易である。また、吸込配管10を真空吸引中に、粉粒体材料Ｇの混合作用も期待できる。 As described in detail above, the present invention comprises a weighing container 1 having a bottom wall 11 and a peripheral wall 12 integrally formed and having an upward opening; a load cell 3 for receiving the weighing container 1 for measuring the weight of the granular material G; A suction pipe 10 having an end 15; and the other end 22 of the suction pipe 10 are connected to vacuum-suck the powdery or granular material G and feed the powdery or granular material G into a kneader 23. Since the device 20 is provided, even if the conventional door 51 and cylinder 58 (see FIG. 4) are omitted, the powdery material G can be discharged upward smoothly. can be used, and the weight of the granular material G can be measured with high accuracy. Moreover, the cost of the load cell 3 can be reduced. The weighing container 1 may be made of a thin steel plate, a light metal such as aluminum, or plastic, which has the advantage of reducing weight and cost. Furthermore, the weighing container 1, the load cell 3, and the input machines 5A and 5B can be installed in a low place in the factory, making it easy to repair and inspect the machine. Further, a mixing action of the powdery material G can be expected while the suction pipe 10 is being vacuum-sucked.

また、本発明によって計量されるところの上記粉粒体材料Ｇとは、鋳造用の中子，鋳型用の砂、人工砂、カルシウム粉等であるので、鋳造用の中子及び鋳型等の製造の高能率化に大きく貢献できる。 In addition, since the powdery material G to be weighed by the present invention includes casting cores, mold sands, artificial sands, calcium powders, etc., manufacturing of casting cores, molds, etc. It can greatly contribute to the high efficiency of

また、上記計量容器１の縦断面形状は、倒立円錐台形状であるので、底壁11に近づくに従って、その横断（水平）面積が減少し、計量容器１内を下方へ移動してくる粉粒体材料Ｇは、吸込用開口端15に、自ら、集められて、残りなく、スムーズに、吸込配管10から吸込まれて、排出される。 Further, since the vertical cross-sectional shape of the weighing container 1 is an inverted truncated cone shape, the cross-sectional (horizontal) area decreases as it approaches the bottom wall 11, and the powder particles moving downward inside the weighing container 1 The body material G is collected by itself at the suction opening 15 and is smoothly sucked through the suction pipe 10 and discharged.

また、上記計量容器１の上記底壁11の縦断面形状は、弯曲凹状であるので、計量容器１内を下方へ移動してくる粉粒体材料Ｇは、弯曲凹状の底壁11の中心の方向に集まりつつ、吸込用開口端15からスムーズに吸込まれて、吸込配管10によって排出できる。 Further, since the bottom wall 11 of the weighing container 1 has a curved concave vertical cross-sectional shape, the granular material G moving downward in the weighing container 1 is positioned at the center of the bottom wall 11 of the curved concave shape. While gathering in the direction, it can be smoothly sucked from the suction opening end 15 and discharged through the suction pipe 10. - 特許庁

また、上記計量容器１をプラスチック製としたので、十分な軽量化を図ることができ、ロードセル３を、さらに一層、小型で高精度なものとすることも可能である。 In addition, since the weighing container 1 is made of plastic, the weight can be sufficiently reduced, and the load cell 3 can be made even more compact and highly accurate.

また、上記計量容器１の底壁11と、上記吸込配管10の吸込用開口端15との、間隙寸法ΔＨを、１０ｍｍ乃至３０ｍｍとしたので、計量容器１内の計量後の粉粒体材料Ｇを、残りなく、スムーズに全てを吸込むことができる。なお、ΔＨが１０ｍｍ未満であると底壁11と吸込用開口端15の隙間に、粉粒体材料Ｇが詰まってしまう虞れが高い。逆に、３０ｍｍを越せば、最後の吸引力が弱く、全量を吸込みできないで、残留する。このように１０ｍｍ≦ΔＨ≦３０ｍｍとすることにより、粉粒体材料Ｇは、スムーズに、残りなく、全てを吸込んで排出できる。 Further, since the gap dimension ΔH between the bottom wall 11 of the weighing container 1 and the suction opening end 15 of the suction pipe 10 is set to 10 mm to 30 mm, the powdered or granular material G in the weighing container 1 after weighing You can inhale everything smoothly without leaving any residue. If ΔH is less than 10 mm, there is a high possibility that the gap between the bottom wall 11 and the suction opening end 15 will be clogged with the granular material G. Conversely, if it exceeds 30 mm, the final suction force is weak and the entire amount cannot be sucked and remains. By satisfying 10 mm≦ΔH≦30 mm in this way, the granular material G can be sucked and discharged smoothly without leaving any residue.

１ 計量容器
３ ロードセル
５Ａ 投入機
５Ｂ 投入機
10 吸込配管
11 底壁
12 周囲壁
15 吸込用開口端
20 真空吸引装置
22 他端
23 混練機
Ｇ 粉粒体材料
ΔＨ 間隙寸法 1 weighing container 3 load cell 5A input machine 5B input machine
10 Suction pipe
11 bottom wall
12 Surrounding wall
15 Suction open end
20 Vacuum suction device
22 other end
23 Kneader G Granular material ΔH Gap size

Claims (6)

底壁（11）と周囲壁（12）が一体に形成された上方開口状の計量容器（１）と、
該計量容器（１）へ上方の投入機（５Ａ）（５Ｂ）から投入される粉粒体材料（Ｇ）の重量を計測するために、上記計量容器（１）を受持するロードセル（３）と、
上記計量容器（１）に非接触状態で上方から差込まれて上記底壁（11）に接近状の吸込用開口端（15）を有する吸込配管（10）と、
上記吸込配管（10）の他端（22）が連結されて、上記粉粒体材料（Ｇ）を真空吸引すると共に、混練機（23）へ、上記粉粒体材料（Ｇ）を投入する真空吸引装置（20）とを、
具備することを特徴とする粉粒体材料の計量・投入装置。 a weighing container (1) with an upward opening in which a bottom wall (11) and a peripheral wall (12) are integrally formed;
A load cell (3) for supporting the weighing container (1) in order to measure the weight of the granular material (G) charged into the weighing container (1) from the upper injectors (5A) and (5B). and,
a suction pipe (10) which is inserted into the weighing container (1) from above in a non-contact state and which has a suction opening end (15) close to the bottom wall (11);
A vacuum to which the other end (22) of the suction pipe (10) is connected to vacuum-suck the powdery or granular material (G) and feed the powdery or granular material (G) into the kneader (23) a suction device (20);
A weighing/throwing device for powdered or granular material, characterized by comprising: 上記粉粒体材料（Ｇ）とは、鋳造用の中子，鋳型用の砂、人工砂、カルシウム粉等である請求項１記載の粉粒体材料の計量・投入装置。 2. The weighing/throwing apparatus for powdery or granular material according to claim 1, wherein said powdery or granular material (G) is a core for casting, sand for mold, artificial sand, calcium powder or the like. 上記計量容器（１）の縦断面形状は、倒立円錐台形状である請求項１又は２記載の粉粒体材料の計量・投入装置。 3. The weighing/throwing-in apparatus for powdered or granular material according to claim 1, wherein the vertical cross-sectional shape of the weighing container (1) is an inverted truncated cone. 上記計量容器（１）の上記底壁（11）の縦断面形状は、弯曲凹状である請求項１又は２記載の粉粒体材料の計量・投入装置。 3. A weighing/throwing-in apparatus for powdered or granular material according to claim 1 or 2, wherein said bottom wall (11) of said weighing container (1) has a curved concave longitudinal cross-sectional shape. 上記計量容器（１）をプラスチック製とした請求項１，２，３又は４記載の粉粒体材料の計量・投入装置。 5. A weighing and charging apparatus for powdered or granular material according to claim 1, wherein said weighing container (1) is made of plastic. 上記計量容器（１）の底壁（11）と、上記吸込配管（10）の吸込用開口端（15）との、間隙寸法（ΔＨ）を、１０ｍｍ乃至３０ｍｍとした請求項１，２，３，４又は５記載の粉粒体材料の計量・投入装置。 Claims 1, 2 and 3, wherein the gap dimension (ΔH) between the bottom wall (11) of the weighing container (1) and the suction opening end (15) of the suction pipe (10) is 10 mm to 30 mm. , 4 or 5.
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JPS6120824A (en) * 1984-07-10 1986-01-29 Ishida Scales Mfg Co Ltd Measuring instrument
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JPH0223114A (en) * 1988-07-11 1990-01-25 Hitachi Plant Eng & Constr Co Ltd Powder weighing and transfer equipment
JPH05203480A (en) * 1991-09-06 1993-08-10 Pfister Gmbh Weight measuring apparatus for injectable material
JPH09101194A (en) * 1995-10-06 1997-04-15 Matsui Mfg Co Device for measuring and transporting powder/granular material
JP2007327962A (en) * 1996-09-18 2007-12-20 Takeda Chem Ind Ltd Weight management device and method of solid
JP2016085090A (en) * 2014-10-24 2016-05-19 株式会社カワタ Weighing device, and powder and granular material transporting device
JP2017044544A (en) * 2015-08-26 2017-03-02 株式会社カワタ Measurement instrument and powder and granular material transport device

Patent Citations (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5184088U (en) * 1974-12-26 1976-07-06
JPS6120824A (en) * 1984-07-10 1986-01-29 Ishida Scales Mfg Co Ltd Measuring instrument
JPS61128126A (en) * 1984-11-26 1986-06-16 Takeda Chem Ind Ltd Tablet weight measuring device
JPH0223114A (en) * 1988-07-11 1990-01-25 Hitachi Plant Eng & Constr Co Ltd Powder weighing and transfer equipment
JPH05203480A (en) * 1991-09-06 1993-08-10 Pfister Gmbh Weight measuring apparatus for injectable material
JPH09101194A (en) * 1995-10-06 1997-04-15 Matsui Mfg Co Device for measuring and transporting powder/granular material
JP2007327962A (en) * 1996-09-18 2007-12-20 Takeda Chem Ind Ltd Weight management device and method of solid
JP2016085090A (en) * 2014-10-24 2016-05-19 株式会社カワタ Weighing device, and powder and granular material transporting device
JP2017044544A (en) * 2015-08-26 2017-03-02 株式会社カワタ Measurement instrument and powder and granular material transport device

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