JP2702550B2 - Parent-child screw feeder - Google Patents

Parent-child screw feeder

Info

Publication number
JP2702550B2
JP2702550B2 JP1118071A JP11807189A JP2702550B2 JP 2702550 B2 JP2702550 B2 JP 2702550B2 JP 1118071 A JP1118071 A JP 1118071A JP 11807189 A JP11807189 A JP 11807189A JP 2702550 B2 JP2702550 B2 JP 2702550B2
Authority
JP
Japan
Prior art keywords
screw feeder
small
diameter screw
diameter
feeder
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Fee Related
Application number
JP1118071A
Other languages
Japanese (ja)
Other versions
JPH02296114A (en
Inventor
勲 寺本
晧 中島
Original Assignee
竹本電機計器株式会社
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by 竹本電機計器株式会社 filed Critical 竹本電機計器株式会社
Priority to JP1118071A priority Critical patent/JP2702550B2/en
Publication of JPH02296114A publication Critical patent/JPH02296114A/en
Application granted granted Critical
Publication of JP2702550B2 publication Critical patent/JP2702550B2/en
Anticipated expiration legal-status Critical
Expired - Fee Related legal-status Critical Current

Links

Classifications

    • BPERFORMING OPERATIONS; TRANSPORTING
    • B29WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29BPREPARATION OR PRETREATMENT OF THE MATERIAL TO BE SHAPED; MAKING GRANULES OR PREFORMS; RECOVERY OF PLASTICS OR OTHER CONSTITUENTS OF WASTE MATERIAL CONTAINING PLASTICS
    • B29B7/00Mixing; Kneading
    • B29B7/30Mixing; Kneading continuous, with mechanical mixing or kneading devices
    • B29B7/58Component parts, details or accessories; Auxiliary operations
    • B29B7/60Component parts, details or accessories; Auxiliary operations for feeding, e.g. end guides for the incoming material
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B29WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29BPREPARATION OR PRETREATMENT OF THE MATERIAL TO BE SHAPED; MAKING GRANULES OR PREFORMS; RECOVERY OF PLASTICS OR OTHER CONSTITUENTS OF WASTE MATERIAL CONTAINING PLASTICS
    • B29B7/00Mixing; Kneading
    • B29B7/30Mixing; Kneading continuous, with mechanical mixing or kneading devices
    • B29B7/58Component parts, details or accessories; Auxiliary operations
    • B29B7/60Component parts, details or accessories; Auxiliary operations for feeding, e.g. end guides for the incoming material
    • B29B7/603Component parts, details or accessories; Auxiliary operations for feeding, e.g. end guides for the incoming material in measured doses, e.g. proportioning of several materials
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B29WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29BPREPARATION OR PRETREATMENT OF THE MATERIAL TO BE SHAPED; MAKING GRANULES OR PREFORMS; RECOVERY OF PLASTICS OR OTHER CONSTITUENTS OF WASTE MATERIAL CONTAINING PLASTICS
    • B29B7/00Mixing; Kneading
    • B29B7/30Mixing; Kneading continuous, with mechanical mixing or kneading devices
    • B29B7/58Component parts, details or accessories; Auxiliary operations
    • B29B7/72Measuring, controlling or regulating
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B29WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29CSHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C48/00Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor
    • B29C48/25Component parts, details or accessories; Auxiliary operations
    • B29C48/285Feeding the extrusion material to the extruder
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B29WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29CSHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C48/00Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor
    • B29C48/25Component parts, details or accessories; Auxiliary operations
    • B29C48/36Means for plasticising or homogenising the moulding material or forcing it through the nozzle or die
    • B29C48/395Means for plasticising or homogenising the moulding material or forcing it through the nozzle or die using screws surrounded by a cooperating barrel, e.g. single screw extruders
    • B29C48/40Means for plasticising or homogenising the moulding material or forcing it through the nozzle or die using screws surrounded by a cooperating barrel, e.g. single screw extruders using two or more parallel screws or at least two parallel non-intermeshing screws, e.g. twin screw extruders

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Weight Measurement For Supplying Or Discharging Of Specified Amounts Of Material (AREA)
  • Screw Conveyors (AREA)
  • Filling Or Emptying Of Bunkers, Hoppers, And Tanks (AREA)

Description

【発明の詳細な説明】 〔産業上の利用分野〕 本発明は粉粒体物質の定量計量用供給機として用いら
れる親子スクリューフィーダに関する。
DETAILED DESCRIPTION OF THE INVENTION [Industrial Application Field] The present invention relates to a parent-child screw feeder used as a feeder for quantitative measurement of a particulate material.

〔従来の技術〕 粉粒体の定量計量は、一般に計量機に載せた計量容器
に、供給機より粉粒体を供給し、計量機の秤量が目標値
に達したとき、供給を停止して所望重量の粉粒体を得て
いる。
[Prior art] Quantitative weighing of powders and granules is generally performed by supplying powders and granules from a feeder to a weighing container placed on a weighing machine, and stopping the supply when the weighing of the weighing machine reaches a target value. A powder having a desired weight is obtained.

従来この計量機は、第9図に示す二軸式スクリューフ
ィーダ(特開昭61−174019)、或いは第10図に示す親子
スクリューフィーダ(特開昭61−23032)等が知られて
いる。
Conventionally, as this weighing machine, a twin-screw screw feeder shown in FIG. 9 (Japanese Patent Application Laid-Open No. 61-174019) or a parent-child screw feeder shown in FIG. 10 (Japanese Patent Application Laid-Open No. 61-23032) is known.

第9図に示す二軸式スクリューフィーダ(1)は、一
つ減速機(2)で2本のスクリュ(3)(3)を駆動で
きるようにして低コスト化を図ったものである。このス
クリューフィーダは、減速機(2)の反対側に軸受兼用
の動力伝達機構(4)を配置し、粉粒体の供給室(5)
に減速機(2)の出力軸と一体的に回転する攪拌翼
(6)を設けている。
The twin-screw feeder (1) shown in FIG. 9 is designed to reduce the cost by driving two screws (3) and (3) with one speed reducer (2). In this screw feeder, a power transmission mechanism (4) also serving as a bearing is arranged on the opposite side of the speed reducer (2), and a supply chamber (5) for powder and granular material is provided.
A stirring blade (6) that rotates integrally with the output shaft of the speed reducer (2).

第10図に示す親子スクリューフィーダ(1)は、大口
径のスクリューフィーダ(8)と小口径のスクリューフ
ィーダ(9)を使用し、計量精度を確保しながら供給時
間の短縮を図ったものである。すなわち、現在の計量値
が目標値よりも大口径のスクリューフィーダの供給最大
誤差分だけ少ない値に達したとき、小口径のスクリュー
フィーダ(9)のみの供給に切り換え、残量を正確に供
給しようとするものである。
The parent-child screw feeder (1) shown in FIG. 10 uses a large-diameter screw feeder (8) and a small-diameter screw feeder (9) to shorten the supply time while ensuring the measurement accuracy. . That is, when the current weighing value reaches a value smaller than the target value by the maximum error of the supply of the screw feeder of a large diameter, the supply is switched to the supply of only the small diameter screw feeder (9) and the remaining amount is accurately supplied. It is assumed that.

〔発明が解決しようとする課題〕[Problems to be solved by the invention]

最近の化学、食品、プラスチック、ファインセラミッ
クス等の分野で使用される粉粒体は、超微粉のため流動
性が小さく付着性が大きいという性質のものが多くなっ
ている。このため第9図及び第10図に示した従来のスク
リューフィーダ(1)(7)では、円滑な供給が困難に
なっている。
2. Description of the Related Art Recently, powders used in the fields of chemistry, foods, plastics, fine ceramics, etc., are ultra-fine powders and have many properties of low fluidity and high adhesion. For this reason, it is difficult for the conventional screw feeders (1) and (7) shown in FIGS. 9 and 10 to supply smoothly.

第9図に示す二軸式スクリューフィーダ(1)は、攪
拌翼(6)で攪拌しても供給室(5)の底部からスクリ
ュ(3)(3)に粉粒体が送られ難く、ここに残留し易
い。また第10図に示す親子スクリューフィーダ(7)
は、攪拌翼がないので、粉粒体が両スクリューに円滑に
送られない。
In the twin-screw screw feeder (1) shown in FIG. 9, even if the stirring is performed by the stirring blade (6), it is difficult for the powdery material to be sent from the bottom of the supply chamber (5) to the screws (3) and (3). Easily remain on the surface. A parent-child screw feeder (7) shown in FIG.
Does not have a stirring blade, so that the granular material is not smoothly fed to both screws.

また第10図に示す親子スクリューフィーダ(7)にお
いて、計量精度を保障する小口径のスクリューフィーダ
(9)はその供給速度によって、計量終了時の絶対誤差
が決まる。このため全計量値に対して何%と決められる
計量精度に対し、計量値が小さいと計量精度が保てない
という事態が生じる。またこれを回避するため供給速度
の小さい小口径のスクリューフィーダを使用すると、大
きな計量値に対して、計量時間が長くなり過ぎるという
問題が生じる。
In the parent-child screw feeder (7) shown in FIG. 10, the absolute error at the end of the measurement is determined by the supply speed of the small-diameter screw feeder (9) that ensures the measurement accuracy. For this reason, with respect to the weighing accuracy determined as a percentage of the total weighed value, if the weighed value is small, the weighing accuracy cannot be maintained. Further, if a small-diameter screw feeder with a small supply speed is used to avoid this, a problem arises in that the measurement time becomes too long for a large measurement value.

さらに、第10図に示す親子スクリューフィーダ(7)
では、小口径のスクリューフィーダ(9)で精度を保証
していても、計量終了間際に、外部振動によって停止し
ている大口径スクリューフィーダ(8)の排出口に残っ
ていた粉粒体の塊が落下して、大きな計量誤差を生じさ
せることがあった。
Further, a parent-child screw feeder (7) shown in FIG.
However, even if the accuracy is guaranteed by the small-diameter screw feeder (9), the lump of the granular material remaining at the outlet of the large-diameter screw feeder (8) stopped by the external vibration immediately before the end of the measurement is obtained. May fall and cause a large weighing error.

そこで本発明は、超微粉体のように流動性が悪く、付
着性が高い粉粒体であっても円滑に供給を行え、計量重
量、必要精度が広範囲にわたる計量を一台の装置で、高
速、高精度に行えるものの提供を目的とする。
Therefore, the present invention has a poor fluidity like ultra-fine powder, can be smoothly supplied even with a powder having high adhesiveness, weighing weight, required accuracy over a wide range of weighing in one device, The purpose is to provide something that can be performed at high speed and with high accuracy.

〔課題を解決するための手段〕[Means for solving the problem]

本発明は大口径のスクリューフィーダと小口径のスク
リューフィーダを上下に平行配置した親子スクリューフ
ィーダにおいて、大口径のスクリューフィーダを駆動す
る定速度電動機と、小口径のスクリューフィーダを駆動
する可変速度電動機を別個に設け、翼端を小口径スクリ
ューフィーダのスクリューに接近させて、大口径スクリ
ューフィーダと同軸に設けられ、小口径スクリューフィ
ーダと逆方向に連動回転する攪拌翼を備えたものを提供
する。
The present invention is a parent-child screw feeder in which a large-diameter screw feeder and a small-diameter screw feeder are vertically arranged in parallel, a constant-speed motor that drives a large-diameter screw feeder, and a variable-speed motor that drives a small-diameter screw feeder. Provided separately is a blade provided with a stirring blade that is provided coaxially with the large-diameter screw feeder, with the blade tip approaching the screw of the small-diameter screw feeder, and that rotates in conjunction with the small-diameter screw feeder in the opposite direction.

またこの基本構成において、 吐出口に、大口径と小口径のスクリューフィーダに共
通の高速カットゲートを設けるとともに、大口径スクリ
ューフィーダの停止時にこのフィーダの排出口下に移動
して同フィーダから落下する粉粒体を受けるカップを設
けたものと、 大口径のスクリューフィーダを停止して、小口径のス
クリューフィーダのみの運転に切り換える小量供給開始
重量と、小量供給時の小口径スクリューフィーダの回転
速度を、計量の目標重量及び計量精度に対応させて記憶
した制御データテーブルを持ち、設定された目標重量及
び計量精度に応じて、定速度電動機と可変速度電動機を
制御する制御装置を備えたものとを提供する。
In this basic configuration, the discharge port is provided with a high-speed cut gate common to the large-diameter screw feeder and the small-diameter screw feeder, and when the large-diameter screw feeder stops, it moves below the discharge port of the feeder and falls from the feeder. With a cup for receiving powder and granules, and a small-diameter screw feeder that stops the large-diameter screw feeder and switches to operation with only the small-diameter screw feeder, and rotation of the small-diameter screw feeder during small-volume feed It has a control data table that stores speeds corresponding to the target weight and weighing accuracy of weighing, and has a control device that controls the constant-speed motor and the variable-speed motor according to the set target weight and weighing accuracy. And provide.

〔作用〕[Action]

上記親子スクリューフィーダは、大口径のスクリュー
フィーダで、計量値の大部分を高速供給する。そして、
小口径のスクリューフィーダで残量を高精度に供給す
る。この供給の際に攪拌翼は大口径と小口径のスクリュ
ーフィーダの周辺にある粉粒体を攪拌して、その供給を
円滑にする。特に小口径のスクリューフィーダのみを低
速で運転するときは、攪拌翼はこれと逆方向に速動回転
して粉粒体をスクリューに安定に供給する。
The parent-child screw feeder is a large-diameter screw feeder that supplies most of the measured values at high speed. And
The remaining amount is supplied with high precision using a small-diameter screw feeder. At the time of this supply, the stirring blade stirs the powder and granules around the large-diameter and small-diameter screw feeders, thereby facilitating the supply. In particular, when only a small-diameter screw feeder is operated at a low speed, the stirring blades rotate at a high speed in the opposite direction to supply the powder to the screw stably.

また大口径のスクリューフィーダに設けたカップは、
小口径のスクリューフィーダのみによる高精度供給の際
に、停止している大口径のスクリューフィーダから粉粒
体の塊が落下するのを防止する。
The cup provided on the large-diameter screw feeder is
In the case of high-precision feeding using only a small-diameter screw feeder, it is possible to prevent a lump of granular material from dropping from a stopped large-diameter screw feeder.

制御装置は、制御データテーブルを参照して目標計量
値、必要精度に応じて、大口径及び小口径のスクリュー
フィーダの停止時期と、小口径のスクリューフィーダの
運転速度を最適制御する。そして大量から小量までの広
範囲な計量に対して高速化、高精度化を達成する。
The control device refers to the control data table and optimally controls the stop timing of the large-diameter and small-diameter screw feeders and the operation speed of the small-diameter screw feeders according to the target measured value and the required accuracy. And it achieves high speed and high accuracy for a wide range of weighing from large to small.

〔実施例〕〔Example〕

本発明の一実施例の親子スクリューフィーダ(10)の
全体構成を第1〜第3図、その主要部品を第4図〜第7
図に示し以下説明する。
1 to 3 show the overall configuration of a parent-child screw feeder (10) according to an embodiment of the present invention, and its main parts are shown in FIGS.
This is shown in the figure and will be described below.

第1図〜第3図において、(11)は基台で、その下部
に可変速度電動機(12)、その天面にホッパー下部の供
給室(13)、及びギヤボックス(14)を載置固定してい
る。
In FIGS. 1 to 3, reference numeral (11) denotes a base, on which a variable speed motor (12) is mounted, and a supply chamber (13) below the hopper and a gear box (14) are mounted and fixed on a top surface thereof. doing.

(15)は供給室(13)に粉粒体を供給するホッパー
で、粉粒体の流動性を高めるエアノッカ(16)を備えて
いる。
A hopper (15) for supplying the granular material to the supply chamber (13) is provided with an air knocker (16) for improving the fluidity of the granular material.

(17)は大口径のスクリューフィーダ、(18)は小口
径のスクリューフィーダで、供給室(13)の一側に上下
に二本の円筒シリンダ(17a)(18a)を平行に取り付
け、大小のスクリュー(17b)(18b)を供給室内から各
円筒シリンダ(17a)(18a)に通すことにより構成され
る。各スクリュー(17b)(18b)の形状は、第4図
(a)(b)及び第6図に拡大して示すようなもので、
ギヤボックス(14)に軸支された各駆動軸(17c)(18
c)に固定されている。
(17) is a large-diameter screw feeder, (18) is a small-diameter screw feeder. Two cylindrical cylinders (17a) and (18a) are mounted in parallel on one side of the supply chamber (13). It is constituted by passing the screws (17b) (18b) from the supply chamber to the respective cylindrical cylinders (17a) (18a). The shape of each screw (17b) (18b) is as shown in FIG. 4 (a) (b) and FIG.
Each drive shaft (17c) (18) supported by the gearbox (14)
c) is fixed.

なお供給室(13)の底部は、小口径のスクリュー(18
b)の外周の回転軌跡に沿う円筒形状となっている。
The bottom of the supply chamber (13) is a small-diameter screw (18
It has a cylindrical shape along the rotation trajectory of the outer circumference of b).

(19)は大口径及び小口径のスクリューフィーダ(1
7)(18)の共用の吐出管で、上記円筒シリンダ(17a)
(18a)と連結されている。この吐出管(19)の下部の
吐出口には高速カットゲート(20)が取付けられ、大口
径のスクリュー(17b)と対向する位置には、第7図に
示すような半円筒状のカップ(21)が取付けられてい
る。このカップ(21)はアクチュエータ(22)によっ
て、大口径のスクリュー(17a)と軸中心を一致させて1
80゜ピッチで回転して、上方又は下方位置を取る。
(19) Large and small diameter screw feeders (1
7) With the common discharge pipe of (18), the cylindrical cylinder (17a)
(18a). A high-speed cut gate (20) is attached to a lower discharge port of the discharge pipe (19), and a semi-cylindrical cup (see FIG. 7) is provided at a position facing the large-diameter screw (17b). 21) is installed. The cup (21) is moved by the actuator (22) so that the center of the shaft is aligned with the large-diameter screw (17a).
Rotate at an 80 ° pitch to take up or down position.

(23)は供給室(13)内で大口径のスクリュ(17a)
と回転中心と一致させて取付けた攪拌翼で、これを第5
図(a)(b)に拡大して示す。この攪拌翼(23)は、
大口径のスクリュ(17b)の出力軸(17c)の外側に図示
しないベアリングを介して嵌めた筒状シャフト(23a)
に取付けられている。
(23) Large-diameter screw (17a) in the supply chamber (13)
And a stirring blade mounted so as to match the center of rotation.
FIGS. 7A and 7B are enlarged views. This stirring blade (23)
A cylindrical shaft (23a) fitted to the outside of the output shaft (17c) of a large-diameter screw (17b) via a bearing (not shown)
Mounted on

(24)はギヤボックス(14)にブラケット(25)を介
して固定した定速度電動機で、大口径のスクリュ(17
b)の出力軸(17c)と継手(24a)で結合されている。
(24) is a constant speed motor fixed to the gear box (14) via a bracket (25).
It is connected to the output shaft (17c) of b) by the joint (24a).

(26)は、上記可変速度電動機(12)の出力軸に取付
けたスプロケットホイール、(27)はチェーンベルト、
(28)は小口径のスクリューフィーダ(18)の駆動軸
(18c)の取付けたスプロケットホイールで、可変速度
電動機(12)の回転を小口径のスクリュー(18c)に伝
達する。(29)(30)は夫々小口径スクリューフィーダ
の駆動軸(18c)と攪拌翼(23)の駆動軸(23a)に固定
されたギアで、相互に噛み合う。
(26) is a sprocket wheel attached to the output shaft of the variable speed motor (12), (27) is a chain belt,
(28) is a sprocket wheel to which the drive shaft (18c) of the small diameter screw feeder (18) is attached, and transmits the rotation of the variable speed motor (12) to the small diameter screw (18c). (29) and (30) are gears fixed to the drive shaft (18c) of the small-diameter screw feeder and the drive shaft (23a) of the stirring blade (23), respectively, and mesh with each other.

(31)は制御装置で、目標計量値及び計量精度の設定
部(32)、制御データテーブルの記憶部(33)、図示し
ない計量機から出力される粉粒体の吐出重量に基づき、
制御データテーブルを参照しながら定速度電動機(24)
及び可変速度電動機(12)を制御する制御回路(34)か
ら構成されている。
(31) is a control device, based on a target weighing value and a weighing accuracy setting unit (32), a storage unit of a control data table (33), and a discharge weight of a granular material output from a weighing machine (not shown).
Constant speed motor (24) while referring to the control data table
And a control circuit (34) for controlling the variable speed motor (12).

上記制御データテーブルは、目標計量値と計量精度に
対して、計量精度を確保しながら高速計量を可能にする
小量供給開始重量と小量供給時の小口径スクリューフィ
ーダの回転速度を定めたもので、例えば第一表に示すよ
うな値を持つ。
The above-mentioned control data table defines the small-quantity supply start weight and the rotation speed of the small-diameter screw feeder at the time of small-quantity supply that enable high-speed weighing while ensuring weighing accuracy, against the target weighing value and weighing accuracy. And has a value as shown in Table 1 for example.

この表は代表的な値を示したもので、実際には目標計
量値のさらに小さな段階についデータが作成されてい
る。
This table shows typical values, and data is actually created for even smaller steps of the target weighing value.

上記親子スクリューフィーダ(10)の動作を第8図に
示すフローチャートについて、以下説明する。
The operation of the parent-child screw feeder (10) will be described below with reference to the flowchart shown in FIG.

最初に制御装置(31)の設定部(32)に、目標計量値
の設定と必要な計量精度の設定を行う。これにより制御
装置(31)は記録部(33)から設定値に対応した制御デ
ータを読み取る。例えば目標計量値が2000gであり、計
量精度が0.5%又は±10gのときは、小量供給開始重量は
100g、(計量機出力基準では2000−100=1900g)であ
り、インバータ周波数(回転速度)は45Hzである。これ
で、運転待機状態に入り、図示しない計量スタートスイ
ッチが押されると、吐出管(19)に設けた高速カットゲ
ート(20)が開けられカップ(21)がアクチュエータ
(22)によって下側に開口する上方姿勢を取らされた
後、制御回路(34によって定速度電動機(24)及び可変
速度電動機(12)が運転を開始する。この場合可変速度
電動機(12)は最高速で運転される。これらの電動機の
運転開始によって、大口径及び小口径のスクリュー(17
b)(18b)は回転し、ホッパー(15)から供給室(13)
に降下した粉粒体は吐出管(19)を通って計量機の上に
載置された計量容器に投入される。この小口径のスクリ
ューの回転時に、小口径のスクリューフィーダ(18)の
駆動軸(18c)の回転はギヤ(29)(30)によって、攪
拌翼(23)の駆動軸(23a)に伝達され、攪拌翼も逆方
向に連動回転する。この攪拌翼(23)の回転によって粉
粒体は大口径及び小口径のスクリュー(17b)(18b)に
円滑に供給される。特に、攪拌翼(23)は供給室(13)
の底部に配置された小口径のスクリュー(18b)に近接
するように動くので、どのような粒状の粉粒体であって
も、このスクリューに確実に供給される。
First, the setting of the target weighing value and the setting of the required weighing accuracy are performed in the setting unit (32) of the control device (31). Thereby, the control device (31) reads control data corresponding to the set value from the recording unit (33). For example, if the target weighing value is 2000 g and the weighing accuracy is 0.5% or ± 10 g, the small supply start weight is
100 g, (2000-100 = 1900 g based on weighing machine output), and the inverter frequency (rotation speed) is 45 Hz. When the operation enters the standby state and the metering start switch (not shown) is pressed, the high-speed cut gate (20) provided in the discharge pipe (19) is opened, and the cup (21) is opened downward by the actuator (22). Then, the control circuit (34) starts the operation of the constant speed motor (24) and the variable speed motor (12). In this case, the variable speed motor (12) is operated at the highest speed. By starting operation of the motor, large and small diameter screws (17
b) (18b) rotates and feeds from the hopper (15) to the supply chamber (13)
The powder and granules which have fallen into the container are put into a measuring container placed on a measuring machine through a discharge pipe (19). When the small-diameter screw rotates, the rotation of the drive shaft (18c) of the small-diameter screw feeder (18) is transmitted to the drive shaft (23a) of the stirring blade (23) by the gears (29) and (30). The stirring blade also rotates in the opposite direction. By the rotation of the stirring blade (23), the granular material is smoothly supplied to the large-diameter and small-diameter screws (17b) (18b). In particular, the stirring blade (23) is provided in the supply chamber (13).
Since it moves so as to approach the small-diameter screw (18b) arranged at the bottom of the screw, any granular material can be reliably supplied to this screw.

このような大口径と小口径のスクリューフィーダ(1
7)(18)の運転によって、粉粒体の供給を続け、計量
機から入力された信号が小量供給開始重量の基準、例え
ば(2000−100=1900g)に達すると、大口径のスクリュ
ーフィーダ(17)の運転のみを停止し、同時にカップ
(21)をそのアクチュエータ(22)により180゜回転さ
せて下側姿勢を取らせる。これにより、外部振動が加わ
っても大口径スクリューフィーダ(18)の出口付近から
粉粒体が落下することはなくなる。また可変速度電動機
(12)は、最初に記憶部(33)から読み込まれた回転速
度、例えばインバータ周波数45Hzの低速運転に切り換わ
る。
Such large and small diameter screw feeders (1
7) By the operation of (18), the supply of the granular material is continued, and when the signal input from the weighing machine reaches the standard of the small amount supply start weight, for example, (2000-100 = 1900g), the large-diameter screw feeder is used. Only the operation of (17) is stopped, and at the same time, the cup (21) is rotated 180 ° by the actuator (22) to take the lower position. As a result, even when external vibration is applied, the granular material does not drop from near the outlet of the large-diameter screw feeder (18). Further, the variable speed motor (12) switches to a low speed operation in which the rotation speed initially read from the storage unit (33), for example, the inverter frequency is 45 Hz.

これによって小口径のスクリューフィーダ(18)と攪
拌翼(23)のみが回転して、粉粒体を小量づつ計量容器
に排出する。
As a result, only the small-diameter screw feeder (18) and the stirring blade (23) are rotated, and the powder is discharged into the measuring container in small quantities.

この運転を継続して、計量機の出力が目標計量値に達
する。高速カットゲート(20)を閉じると同時に可変速
度電動機(12)を停止させる。これによって計量が完了
する。
By continuing this operation, the output of the weighing machine reaches the target weighing value. At the same time as closing the high-speed cut gate (20), the variable speed motor (12) is stopped. This completes the weighing.

上記説明では、粉粒体の目標計量値が2000gと比較的
大きい場合を例に上げたので、運転開始時に大口径と小
口径のスクリューフィーダ(17)(18)を共に運転させ
ていた。しかし、目標計量値が20gというように小さい
場合は、第一表に示すように、小量投入開始重量が20g
であるので、大口径のスクリューフィーダ(17)は回転
させないで、小口径のスクリューフィーダ(18)のみに
よって供給を行うことになる。
In the above description, the case where the target weighing value of the granular material is relatively large as 2000 g is taken as an example, so that the large-diameter and small-diameter screw feeders (17) and (18) are operated at the start of operation. However, when the target weighing value is as small as 20 g, as shown in the first table, the small amount starting weight is 20 g.
Therefore, the supply is performed only by the small-diameter screw feeder (18) without rotating the large-diameter screw feeder (17).

また、可変速度電動機(12)はインバータモータの他
に、速度制御可能なDCモータを使用することもできる。
The variable speed motor (12) can use a DC motor whose speed can be controlled, in addition to the inverter motor.

〔発明の効果〕〔The invention's effect〕

本発明によれば、超微粉のように供給特性が悪い粉粒
体を、特有の取付構造を有する攪拌翼の作用によって大
口径を小口径のスクリュによって円滑に供給できる。
ADVANTAGE OF THE INVENTION According to this invention, a large diameter can be smoothly supplied by the small diameter screw by the effect | action of the stirring blade which has a specific mounting structure, such as an ultrafine powder, which has poor supply characteristics.

また、大口径のスクリューフィーダの排出口に設けた
カップにより、小量供給中に粉粒体が大量落下すること
による誤差を防止し、高精度計量を保証する。
Further, the cup provided at the outlet of the large-diameter screw feeder prevents an error caused by a large amount of powder particles falling during small-quantity supply, and ensures high-precision weighing.

本発明の制御装置は、制御データテーブルを参照し
て、大口径のスクリューフィーダの動作・停止の制御及
び小口径のスクリューフィーダの可変速制御を行い、計
量値、必要精度が広範囲にわたる計量を、一台の供給機
で高速・高精度に行うことを可能にする。
The control device of the present invention refers to the control data table, controls the operation / stop of the large-diameter screw feeder and performs variable speed control of the small-diameter screw feeder, and performs measurement with a wide range of measurement values and required accuracy. Enables high-speed, high-precision operation with a single feeder.

【図面の簡単な説明】[Brief description of the drawings]

第1図〜第3図は本発明の一実施例の親子スクリューフ
ィーダの全体構成を示し、第1図は正面図、第2図は平
面図、第3図は左側面図である。第4図〜第7図は本発
明の親子スクリューフィーダに用いられる主要部品を示
し、第4図(a)(b)は大口径のスクリューフィーダ
の正面図及び側面図、第5図(a)(b)は攪拌翼の側
面図及び正面図、第6図は小口径のスクリューフィーダ
の正面図、第7図はカップの斜視図である。第8図は本
発明の親子スクリューフィーダの一実施例における動作
手順を示すフローチャートである。 第9図及び第10図は従来例を示し、第9図は2軸式スク
リューフィーダの断面図、第10図は親子スクリューフィ
ーダの断面図である。 (10)……親子スクリューフィーダ、 (12)……可変速度電動機、 (13)……供給室、 (17)……大口径のスクリューフィーダ、 (18)……小口径のスクリューフィーダ、 (20)……高速カットゲート、 (21)……カップ、(23)……攪拌翼、 (24)……定速度電動機、(31)……制御装置、 (33)……記憶部。
1 to 3 show the overall configuration of a parent-child screw feeder according to an embodiment of the present invention. FIG. 1 is a front view, FIG. 2 is a plan view, and FIG. 3 is a left side view. 4 to 7 show main parts used in the parent-child screw feeder of the present invention. FIGS. 4 (a) and (b) are a front view and a side view of a large-diameter screw feeder, and FIG. 5 (a). (B) is a side view and a front view of the stirring blade, FIG. 6 is a front view of a small-diameter screw feeder, and FIG. 7 is a perspective view of a cup. FIG. 8 is a flowchart showing an operation procedure in one embodiment of the parent-child screw feeder of the present invention. 9 and 10 show a conventional example, FIG. 9 is a sectional view of a biaxial screw feeder, and FIG. 10 is a sectional view of a parent-child screw feeder. (10) Parent-child screw feeder (12) Variable speed motor (13) Supply chamber (17) Large screw feeder (18) Small screw feeder (20) ) High-speed cut gate, (21) cup, (23) stirring blade, (24) constant-speed electric motor, (31) control device, (33) storage unit.

Claims (3)

(57)【特許請求の範囲】(57) [Claims] 【請求項1】大口径のスクリューフィーダと小口径のス
クリューフィーダを上下に平行配置した親子スクリュー
フィーダにおいて、 大口径のスクリューフィーダを駆動する定速度電動機
と、小口径のスクリューフィーダを駆動する可変速度電
動機を別個に設け、 翼端を小口径スクリューフィーダのスクリューに接近さ
せて、大口径スクリューフィーダと同軸に設けられ、小
口径スクリューフィーダと逆方向に連動回転する攪拌翼
を備えたことを特徴とする親子スクリューフィーダ。
1. A constant-speed motor for driving a large-diameter screw feeder, and a variable-speed motor for driving a small-diameter screw feeder in a parent-child screw feeder in which a large-diameter screw feeder and a small-diameter screw feeder are vertically arranged in parallel. A motor is provided separately, the blade tip is brought close to the screw of the small-diameter screw feeder, and the stirring blade is provided coaxially with the large-diameter screw feeder and rotates in conjunction with the small-diameter screw feeder in the opposite direction. Parent and child screw feeder.
【請求項2】吐出口に、大口径と小口径のスクリューフ
ィーダに共通の高速カットゲートを設けるとともに、大
口径スクリューフィーダの停止時にこのフィーダの排出
口下に移動して同フィーダから落下する粉粒体を受ける
カップを設けたことを特徴とする請求項1記載の親子ス
クリューフィーダ。
2. A discharge port having a high-speed cut gate common to a large-diameter screw feeder and a small-diameter screw feeder. When the large-diameter screw feeder is stopped, the powder that moves below the discharge port of the feeder and drops from the feeder. The parent-child screw feeder according to claim 1, further comprising a cup for receiving the granules.
【請求項3】大口径のスクリューフィーダを停止して、
小口径のスクリューフィーダのみの運転に切り換える小
量供給開始重量と、小量供給時の小口径スクリューフィ
ーダの回転速度を、計量の目標重量及び計量精度に対応
させて記憶した制御データテーブルを持ち、設定された
目標重量及び計量精度に応じて、定速度電動機と可変速
度電動機を制御する制御装置を備えた請求項1又は2に
記載の親子スクリューフィーダ。
3. Stopping the large diameter screw feeder,
It has a control data table that stores the small-amount feed start weight to switch to the operation of only the small-diameter screw feeder, and the rotation speed of the small-diameter screw feeder at the time of the small-amount supply in accordance with the target weight and the measurement accuracy of the measurement. The parent-child screw feeder according to claim 1 or 2, further comprising a control device that controls the constant speed motor and the variable speed motor according to the set target weight and weighing accuracy.
JP1118071A 1989-05-10 1989-05-10 Parent-child screw feeder Expired - Fee Related JP2702550B2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP1118071A JP2702550B2 (en) 1989-05-10 1989-05-10 Parent-child screw feeder

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP1118071A JP2702550B2 (en) 1989-05-10 1989-05-10 Parent-child screw feeder

Publications (2)

Publication Number Publication Date
JPH02296114A JPH02296114A (en) 1990-12-06
JP2702550B2 true JP2702550B2 (en) 1998-01-21

Family

ID=14727284

Family Applications (1)

Application Number Title Priority Date Filing Date
JP1118071A Expired - Fee Related JP2702550B2 (en) 1989-05-10 1989-05-10 Parent-child screw feeder

Country Status (1)

Country Link
JP (1) JP2702550B2 (en)

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102249074B (en) * 2011-04-13 2013-06-05 北京中诺德瑞工业科技有限公司 Rotary feeder
PL3094463T3 (en) * 2014-01-16 2021-12-13 Ampacet Corporation Weighing and mixing system for the preparation of a mixture of granular components, and related method
CN108545417B (en) * 2018-05-23 2024-02-23 佛山市南海天富科技有限公司 Feed opening subassembly

Also Published As

Publication number Publication date
JPH02296114A (en) 1990-12-06

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