JPH069852B2 - Raw material consumption detection device for synthetic resin extrusion device and method for controlling extrusion amount - Google Patents

Raw material consumption detection device for synthetic resin extrusion device and method for controlling extrusion amount

Info

Publication number
JPH069852B2
JPH069852B2 JP63162671A JP16267188A JPH069852B2 JP H069852 B2 JPH069852 B2 JP H069852B2 JP 63162671 A JP63162671 A JP 63162671A JP 16267188 A JP16267188 A JP 16267188A JP H069852 B2 JPH069852 B2 JP H069852B2
Authority
JP
Japan
Prior art keywords
raw material
amount
hopper
screw
resin
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 - Lifetime
Application number
JP63162671A
Other languages
Japanese (ja)
Other versions
JPH0214118A (en
Inventor
明 清水
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
MODAN MACHINERY
Original Assignee
MODAN MACHINERY
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 MODAN MACHINERY filed Critical MODAN MACHINERY
Priority to JP63162671A priority Critical patent/JPH069852B2/en
Publication of JPH0214118A publication Critical patent/JPH0214118A/en
Publication of JPH069852B2 publication Critical patent/JPH069852B2/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C48/00—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor
    • B29C48/25—Component parts, details or accessories; Auxiliary operations
    • B29C48/92—Measuring, controlling or regulating
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C2948/00—Indexing scheme relating to extrusion moulding
    • B29C2948/92—Measuring, controlling or regulating
    • B29C2948/92009—Measured parameter
    • B29C2948/9218—Weight
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C2948/00—Indexing scheme relating to extrusion moulding
    • B29C2948/92—Measuring, controlling or regulating
    • B29C2948/92323—Location or phase of measurement
    • B29C2948/92361—Extrusion unit
    • B29C2948/9238—Feeding, melting, plasticising or pumping zones, e.g. the melt itself
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C2948/00—Indexing scheme relating to extrusion moulding
    • B29C2948/92—Measuring, controlling or regulating
    • B29C2948/92504—Controlled parameter
    • B29C2948/9258—Velocity
    • B29C2948/9259—Angular velocity
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C2948/00—Indexing scheme relating to extrusion moulding
    • B29C2948/92—Measuring, controlling or regulating
    • B29C2948/92504—Controlled parameter
    • B29C2948/9258—Velocity
    • B29C2948/926—Flow or feed rate
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C2948/00—Indexing scheme relating to extrusion moulding
    • B29C2948/92—Measuring, controlling or regulating
    • B29C2948/92819—Location or phase of control
    • B29C2948/92857—Extrusion unit
    • B29C2948/92876—Feeding, melting, plasticising or pumping zones, e.g. the melt itself
    • B29C2948/92885—Screw or gear
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C48/00—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor
    • B29C48/03—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor characterised by the shape of the extruded material at extrusion
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C48/00—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor
    • B29C48/25—Component parts, details or accessories; Auxiliary operations
    • B29C48/285—Feeding the extrusion material to the extruder
    • B29C48/286—Raw material dosing

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Extrusion Moulding Of Plastics Or The Like (AREA)

Description

【発明の詳細な説明】 〈産業上の利用分野〉 本発明は合成樹脂押出装置の原料消費量検出装置及び押
出量の制御方法に関する。The present invention relates to a raw material consumption detecting device for a synthetic resin extrusion device and a method for controlling the extrusion amount.

〈従来の技術〉 従来の合成樹脂の押出装置では、一定量の樹脂原料を押
出装置に補給して、その消費時間を測定して単位時間当
りの原料消費量を演算する方法などが採られていた。<Prior Art> A conventional synthetic resin extrusion device employs a method in which a constant amount of resin raw material is supplied to the extrusion device, the consumption time is measured, and the raw material consumption amount per unit time is calculated. It was

〈発明が解決しようとする課題〉 従来のように一定量の原料が消費される時間を測定する
ことにより単位時間当りの原料消費量を演算する方法で
は、消費時間の正確な測定が困難で、信頼性が低く、し
かも間欠的な測定であるため誤差や遅れを生じやすかっ
た。<Problems to be Solved by the Invention> In the conventional method of calculating the raw material consumption amount per unit time by measuring the time taken to consume a certain amount of raw material, it is difficult to accurately measure the consumption time, Due to low reliability and intermittent measurement, errors and delays were likely to occur.

又、第３図及び第４図に示すようにホッパー４について
重量検出部３を設けて原料消費量を測定しようとする場
合、ホッパー４内の樹脂原料８が原料消費に伴って破線
５から実線６までレベルを低下しても、検出される重量
変化は、出口１０の直上部分７を除く斜線部分のみであ
った。つまり、ホッパー４の出口１０より上方部分の樹
脂７はその重量がホッパー４に作用しないため、その重
量変化が重量検出部３によって検出されず、このため、
ホッパー４内の原料変化量を正確に検出することができ
なかった。Further, as shown in FIG. 3 and FIG. 4, when the weight detection unit 3 is provided for the hopper 4 to measure the raw material consumption, the resin raw material 8 in the hopper 4 is drawn from the broken line 5 to the solid line along with the raw material consumption. Even if the level was lowered to 6, the weight change detected was only in the shaded portion except the portion 7 immediately above the outlet 10. That is, since the weight of the resin 7 in the portion above the outlet 10 of the hopper 4 does not act on the hopper 4, the weight change is not detected by the weight detection unit 3, and therefore,
The amount of change in the raw material in the hopper 4 could not be detected accurately.

本発明はホッパー内に投入された樹脂原料の正確な重量
変化を連続的に検出することのできる原料消費量検出装
置を提供することを目的とするものである。更に、他の
目的は、上記原料消費量検出装置を利用して、設定され
た押出量となるようにスクリューの回転数を制御する方
法を提供することを目的とするものである。It is an object of the present invention to provide a raw material consumption amount detecting device capable of continuously detecting an accurate weight change of a resin raw material charged in a hopper. Still another object of the present invention is to provide a method of controlling the rotation speed of the screw so as to obtain a set extrusion amount by using the above-mentioned raw material consumption amount detecting device.

〈課題を解決するための手段〉 斯かる目的を達成する本発明の合成樹脂押出装置の原料
消費量検出装置にかかる構成はホッパーに投入された樹
脂原料を、スクリューに供給しつつ前記スクリューを回
転させて溶融した樹脂を押し出す合成樹脂押出装置にお
いて、前記ホッパーの出口直上には、該出口の断面形状
より大きく、かつ、前記樹脂原料を連続して落下可能な
形状の原料受け部材を配置し、該原料受け部材を連結棒
にて前記ホッパーに固定し、更に前記ホッパー及び該ホ
ッパーに加わる荷重を検出する重量検出部を設けたこと
を特徴とする。<Means for Solving the Problems> The structure of the raw material consumption detecting device of the synthetic resin extrusion device of the present invention which achieves such an object is to rotate the screw while feeding the resin raw material charged into the hopper to the screw. In the synthetic resin extrusion device for extruding the molten resin, the raw material receiving member having a shape larger than the cross-sectional shape of the outlet and having the shape capable of continuously dropping the resin raw material is arranged immediately above the outlet of the hopper, The raw material receiving member is fixed to the hopper by a connecting rod, and a weight detecting unit for detecting the load applied to the hopper and the hopper is further provided.

また、上記目的を達成する本発明の押出量の制御方法に
かかる構成は前記重量検出部により検出される重量の時
間的変化から前記樹脂原料の単位時間当りの消費量を演
算し、予め前記スクリューにより押し出される量につい
て設定された設定量と前記消費量とを比較し、これらの
差に基づいて前記スクリューの回転数を増減させて、前
記消費量を前記設定量に収束せしめることを特徴とす
る。Further, the configuration according to the method for controlling the extrusion amount of the present invention which achieves the above object is to calculate the consumption amount of the resin raw material per unit time from the time change of the weight detected by the weight detection unit, and to advance the screw. It is characterized in that the set amount set for the amount pushed out by the and the consumption amount are compared, and the rotation speed of the screw is increased or decreased based on the difference between them so that the consumed amount is converged to the set amount. .

〈作 用〉 ホッパーに投入された樹脂原料のうち、出口の上方に位
置するものについても原料受け部材を介してホッパーに
重量が作用するので、ホッパーに投入された樹脂原料の
重量が重量検出部によって正確に検出される。従って、
重量の時間的変化により単位時間当りの原料消費量が連
続的に検出されることになる。<Working> Among the resin raw materials put in the hopper, the weight of the resin raw material put in the hopper is the weight of the resin raw material put in the hopper because the weight acts on the hopper via the raw material receiving member even for the resin raw material located above the outlet. Is accurately detected by. Therefore,
The raw material consumption per unit time is continuously detected by the change in weight over time.

〈実 施 例〉 以下、本発明の一実施例について図面を参照して詳細に
説明する。<Example> Hereinafter, an example of the present invention will be described in detail with reference to the drawings.

第１図及び第２図に本発明の一実施例を示す。両図に示
すようにホッパー４内において、出口１０の上方には出
口１０を覆うように原料受け部材９が配設され連結棒１
２を介してホッパー４に固定されている。この原料受け
部材９は第２図に示すように出口１０の断面形状よりも
大きな形状であり、また、その上面は樹脂原料８が連続
して落下可能なように傾斜面となっている。従って、ホ
ッパー４内に投入された樹脂原料８のうち、出口１０の
上方に位置する部分の重量までもが原料受け部材９を介
してホッパー４に作用する。このためホッパー４につい
て設けられた重量検出部３により、、ホッパー４に投入
された樹脂原料８の正確な重量が検出される。そして、
樹脂原料８がスクリュー２に供給されて消費されると、
ホッパー４内の樹脂原料８が減少し、重量検出部３によ
りその変化量を検出すれば、単位時間当りの原料消費量
が図示しないコンピユータにより連続的に演算すること
ができる。このように連続的に求めた原料消費量Ａと、
予めスクリュー２により押し出すべき量として設定され
た設定値Ｂとを比較し、Ａ＞Ｂであればスクリュー２の
回転数を低下させ、逆にＡ＜Ｂであればスクリュー２の
回転数を増加させれば、消費量Ａを設定値Ｂに収束させ
ることができる。スクリュー２の回転数の増加減少は消
費量Ａと設定値Ｂの差に基づいて制御すると、効果的で
ある。上記設定値Ｂとしては時間的に一定のものとして
も良いが、時間的に連続してあるいは段階的に変化する
ものとしても良い。また、押出装置のダイに設けられる
スクリーンに目詰りが生じて押し出しの効率が低下して
も、本発明によればスクリュー２の回転数を増大させる
ことにより、一定の押出量とすることができる。1 and 2 show an embodiment of the present invention. As shown in both figures, in the hopper 4, a raw material receiving member 9 is arranged above the outlet 10 so as to cover the outlet 10, and the connecting rod 1
It is fixed to the hopper 4 via 2. As shown in FIG. 2, the raw material receiving member 9 has a shape larger than the cross-sectional shape of the outlet 10, and the upper surface thereof is an inclined surface so that the resin raw material 8 can be continuously dropped. Therefore, even the weight of the portion of the resin raw material 8 placed in the hopper 4 located above the outlet 10 acts on the hopper 4 via the raw material receiving member 9. Therefore, the weight detection unit 3 provided for the hopper 4 detects the accurate weight of the resin raw material 8 charged into the hopper 4. And
When the resin raw material 8 is supplied to the screw 2 and consumed,
If the amount of the resin raw material 8 in the hopper 4 is reduced and the amount of change is detected by the weight detection unit 3, the amount of raw material consumed per unit time can be continuously calculated by a computer (not shown). In this way, the raw material consumption A continuously obtained,
Compare with a set value B set as the amount to be extruded by the screw 2 in advance, if A> B, decrease the rotation speed of the screw 2, and conversely, if A <B, increase the rotation speed of the screw 2. Then, the consumption amount A can be converged to the set value B. It is effective to control the increase and decrease of the rotation speed of the screw 2 based on the difference between the consumption amount A and the set value B. The set value B may be constant with time, or may be continuously or stepwise changed in time. Further, even if the screen provided on the die of the extrusion device is clogged and the extrusion efficiency is reduced, according to the present invention, a constant extrusion amount can be obtained by increasing the rotation speed of the screw 2. .

〈発明の効果〉 以上、実施例に基づいて具体的に説明したように本発明
はホッパーに投入されしだいに消費されてゆく樹脂原料
の消費量を連続的に正確に検出することができる。従っ
て、樹脂原料の消費量に基づいてスクリューの回転数を
制御することにより、押出量の変動が及ぼす製品寸法の
変動を回避できる。<Effects of the Invention> As specifically described above based on the embodiments, the present invention can continuously and accurately detect the consumption amount of the resin raw material that is consumed as soon as it is charged into the hopper. Therefore, by controlling the number of rotations of the screw based on the consumption amount of the resin raw material, it is possible to avoid the variation in the product size caused by the variation in the extrusion amount.

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

第１図、第２図はそれぞれ本発明の一実施例を示す断面
図，平面図，第３図，第４図はそれぞれ従来の合成樹脂
押出装置の断面図，平面図である。 図面中、 １はシリンダ、 ２はスクリュー、 ３は重量検出部、 ４はホッパー、 ８は樹脂原料、 ９は原料受け部材、 １０は出口である。1 and 2 are a sectional view and a plan view, respectively, showing an embodiment of the present invention, and FIGS. 3 and 4 are a sectional view and a plan view of a conventional synthetic resin extruder, respectively. In the drawings, 1 is a cylinder, 2 is a screw, 3 is a weight detection unit, 4 is a hopper, 8 is a resin raw material, 9 is a raw material receiving member, and 10 is an outlet.

Claims (2)

【特許請求の範囲】[Claims] 【請求項１】ホッパーに投入された樹脂原料を、スクリ
ューに供給しつつ前記スクリューを回転させて溶融した
樹脂を押し出す合成樹脂押出装置において、前記ホッパ
ーの出口直上には、該出口の断面形状より大きく、か
つ、前記樹脂原料を連続して落下可能な形状の原料受け
部材を配置し、該原料受け部材を連結棒にて前記ホッパ
ーに固定し、更に前記ホッパー及び該ホッパーに加わる
荷重を検出する重量検出部を設けたことを特徴とする合
成樹脂押出装置の原料消費量検出装置。1. A synthetic resin extruding apparatus for extruding a molten resin by rotating a screw while feeding a resin raw material charged into a hopper into a screw, and immediately above the outlet of the hopper, a cross-sectional shape of the outlet is provided. A raw material receiving member having a large size and capable of continuously dropping the resin raw material is arranged, the raw material receiving member is fixed to the hopper with a connecting rod, and the hopper and a load applied to the hopper are detected. A raw material consumption detecting device for a synthetic resin extruding device, characterized in that a weight detecting portion is provided. 【請求項２】特許請求の範囲第１項において、前記重量
検出部より検出される重量の時間的変化から前記樹脂原
料の単位時間当たりの消費量を演算し、予め前記スクリ
ューにより押し出される量について設定された設定量と
前記消費量とを比較し、これらの差に基づいて前記スク
リューの回転数を増減させて、前記消費量を前記設定量
に収束せしめることを特徴とする押出量の制御方法。2. The amount of the resin raw material consumed per unit time is calculated from the temporal change in the weight detected by the weight detection unit according to claim 1, and the amount extruded by the screw is calculated in advance. A method of controlling the extrusion amount, characterized in that the set amount set and the consumption amount are compared, and the rotation speed of the screw is increased or decreased based on the difference between them to converge the consumption amount to the set amount. .
JP63162671A 1988-07-01 1988-07-01 Raw material consumption detection device for synthetic resin extrusion device and method for controlling extrusion amount Expired - Lifetime JPH069852B2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP63162671A JPH069852B2 (en) 1988-07-01 1988-07-01 Raw material consumption detection device for synthetic resin extrusion device and method for controlling extrusion amount

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP63162671A JPH069852B2 (en) 1988-07-01 1988-07-01 Raw material consumption detection device for synthetic resin extrusion device and method for controlling extrusion amount

Publications (2)

Publication Number Publication Date
JPH0214118A JPH0214118A (en) 1990-01-18
JPH069852B2 true JPH069852B2 (en) 1994-02-09

Family

ID=15759073

Family Applications (1)

Application Number Title Priority Date Filing Date
JP63162671A Expired - Lifetime JPH069852B2 (en) 1988-07-01 1988-07-01 Raw material consumption detection device for synthetic resin extrusion device and method for controlling extrusion amount

Country Status (1)

Country Link
JP (1) JPH069852B2 (en)

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH0818365B2 (en) * 1990-03-09 1996-02-28 東洋電機株式会社 Intake control device for inflation film making machine
JPH07102613B2 (en) * 1990-03-09 1995-11-08 東洋電機株式会社 Extrusion amount control device for inflation film manufacturing machine
JPH04126219A (en) * 1990-09-17 1992-04-27 Shikoku Maruyasu Kk Method and apparatus for monitoring ratio of extrusion rate of extrusion molder
JPH089194B2 (en) * 1991-02-15 1996-01-31 株式会社マルヤス Inflation molding method and apparatus therefor
CN114433844B (en) * 2020-11-06 2024-06-11 广东伊之密精密机械股份有限公司 Method and device for controlling temperature of charging barrel of injection molding machine and injection molding machine

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS52140364A (en) * 1976-05-18 1977-11-22 Yoshinori Kamihoriuchi Feeder for measuring instrument

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS6216661Y2 (en) * 1979-06-05 1987-04-27

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS52140364A (en) * 1976-05-18 1977-11-22 Yoshinori Kamihoriuchi Feeder for measuring instrument

Also Published As

Publication number Publication date
JPH0214118A (en) 1990-01-18

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