JPH071554A - Method and apparatus for heating cylinder of extruder - Google Patents
Method and apparatus for heating cylinder of extruderInfo
- Publication number
- JPH071554A JPH071554A JP5146160A JP14616093A JPH071554A JP H071554 A JPH071554 A JP H071554A JP 5146160 A JP5146160 A JP 5146160A JP 14616093 A JP14616093 A JP 14616093A JP H071554 A JPH071554 A JP H071554A
- Authority
- JP
- Japan
- Prior art keywords
- cylinder
- temperature
- heater coil
- heating device
- extruder
- 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.)
- Granted
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
- B29C2948/92209—Temperature
-
- 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
- B29C2948/924—Barrel or housing
-
- 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
- B29C2948/92704—Temperature
-
- 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
- B29C2948/92895—Barrel or housing
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Extrusion Moulding Of Plastics Or The Like (AREA)
Abstract
Description
【0001】[0001]
【産業上の利用分野】本発明は、断面の外縁が角形であ
るシリンダ内で樹脂が溶融、混練、成形押出される押出
機のシリンダを加熱するための加熱方法および加熱装置
に関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a heating method and a heating device for heating a cylinder of an extruder in which a resin is melted, kneaded, and molded and extruded in a cylinder whose outer edge has a rectangular cross section.
【0002】[0002]
【従来の技術】図4は、従来の加熱装置の一実施例の冷
却ファン76を有する場合の概略斜視図である。2. Description of the Related Art FIG. 4 is a schematic perspective view of a conventional heating device having a cooling fan 76.
【0003】従来、スクリュー式押出成形機は、一般
に、図2におけるシリンダ1と、該シリンダ1内で回転
されるスクリューと、シリンダ1に樹脂原料11を供給
するホッパ9と、シリンダ1の先端部に取付けられる成
形用ダイ10と、スクリューを駆動するモータと、シリ
ンダの外周部において内部の樹脂を溶融、ゲル化するた
めのヒータと、シリンダ1の温度制御装置等から構成さ
れている。従来より加熱方式は、種々のものが採用され
てきた。そのなかで、多量の熱量を必要とする場合は、
アルミ鋳込ヒータ、真鍮鋳込ヒータ、バンドヒータ等の
抵抗加熱方式に代わり、誘導加熱方式のものが採用され
ている。誘導加熱方式のなかでシリンダ1の断面が円形
の場合はシリンダ1のまわりにソレノイド状にコイルを
巻いて交流電力を流しシリンダ1に渦電流を発生させ、
この熱を利用している。Conventionally, a screw type extrusion molding machine is generally a cylinder 1 shown in FIG. 2, a screw rotated in the cylinder 1, a hopper 9 for supplying a resin raw material 11 to the cylinder 1, and a tip portion of the cylinder 1. , A motor for driving the screw, a heater for melting and gelating the resin inside the outer peripheral portion of the cylinder, a temperature control device for the cylinder 1, and the like. Conventionally, various heating methods have been adopted. Among them, when a large amount of heat is required,
Instead of resistance heating methods such as aluminum casting heaters, brass casting heaters, and band heaters, induction heating type ones are used. When the cylinder 1 has a circular cross section in the induction heating method, a coil is wound around the cylinder 1 in the form of a solenoid to allow AC power to flow and generate an eddy current in the cylinder 1.
This heat is used.
【0004】そこで、とくに断面の外縁が角形のシリン
ダ1を有する、二軸式の押出機の場合は、交番磁束にア
ンバランスが生ずるのを防ぐために平型のヒータコイル
が用いられている。しかしながらこの方式の場合は、ヒ
ータコイルの温度上昇が起こり易いので許容温度以下に
防ぐ措置が必要であり、そのため冷却流体を流すジャケ
ットを設けたり、冷却ファン76を設けるなどにより、
コイルを冷却する方法が採用されている場合もあった。Therefore, particularly in the case of a twin-screw extruder having a cylinder 1 whose outer edge has a rectangular cross section, a flat heater coil is used to prevent imbalance in the alternating magnetic flux. However, in the case of this method, since the temperature rise of the heater coil is likely to occur, it is necessary to take measures to prevent the temperature from being lower than the allowable temperature. Therefore, by providing a jacket for flowing a cooling fluid or a cooling fan 76,
In some cases, a method of cooling the coil has been adopted.
【0005】[0005]
【発明が解決しようとする課題】しかしながら、上述の
ジャケットや冷却ファンによりコイルを冷却する方法で
は装置が大型化し設備費および運転コストが嵩むので好
ましくない。したがって、本発明の目的は、シリンダか
らヒータコイルへの熱伝達を防ぐために断熱材を備え、
シリンダの温度自動調整機構、ヒータコイルの温度自動
警報機構を設けることにより、シリンダの温度を所定の
範囲内に維持することができ、かつコイルの温度を所定
の温度以下に維持することができる押出機のシリンダの
加熱方法および加熱装置を提供することである。However, the above-described method of cooling the coil by the jacket or the cooling fan is not preferable because the apparatus becomes large and the equipment cost and the operating cost increase. Therefore, an object of the present invention is to provide a heat insulating material to prevent heat transfer from the cylinder to the heater coil,
Extrusion that can maintain the temperature of the cylinder within a specified range and the temperature of the coil below a specified temperature by providing an automatic temperature adjustment mechanism for the cylinder and an automatic alarm mechanism for the heater coil temperature. A method and a device for heating a cylinder of a machine are provided.
【0006】[0006]
【課題を解決するための手段】本発明の押出機のシリン
ダの加熱方法は、シリンダの内部の温度を測定し、その
測定値に基づいてヒータコイルを有する誘導加熱装置へ
の供給電流を制御することにより、シリンダの温度を所
定の範囲内に維持し、加熱されたシリンダからヒータコ
イルへの熱伝達が遮断され、かつヒータコイルの表面の
温度を測定し、その測定値に基づいて誘導加熱装置への
供給電流を制御することによりヒータコイルの温度を所
定の温度以下に維持する方法を含むことを特徴としてい
る。According to the method for heating a cylinder of an extruder of the present invention, the temperature inside the cylinder is measured, and the supply current to an induction heating device having a heater coil is controlled based on the measured value. As a result, the temperature of the cylinder is maintained within a predetermined range, heat transfer from the heated cylinder to the heater coil is cut off, the temperature of the surface of the heater coil is measured, and the induction heating device is based on the measured value. The method is characterized by including a method of maintaining the temperature of the heater coil at a predetermined temperature or lower by controlling the current supplied to the heater coil.
【0007】また、押出機のシリンダの加熱装置は、加
熱されたシリンダからヒータコイルへの熱伝達を防ぐた
めの断熱材と、ヒータコイルを有する誘導加熱装置へ電
流を供給する電磁制御器と、シリンダの内部の温度を測
定する測温体と、その測定値に基づいて誘導加熱装置へ
の供給電流の制御信号を電磁制御器へ送信する温度調節
器と、ヒータコイルの表面の温度を測定する測温体と、
その測定値に基づいて誘導加熱装置への供給電流の制御
信号を電磁制御器へ送信する警報器とが備えられ、これ
らの設備によりシリンダの温度が所定の温度範囲内に維
持され、かつヒータコイルの温度が所定の温度以下に維
持されることができることを特徴としている。Further, the heating device for the cylinder of the extruder includes a heat insulating material for preventing heat transfer from the heated cylinder to the heater coil, and an electromagnetic controller for supplying a current to the induction heating device having the heater coil. A temperature sensing element that measures the temperature inside the cylinder, a temperature controller that sends a control signal of the current supplied to the induction heating device to the electromagnetic controller based on the measured value, and the temperature of the surface of the heater coil A temperature sensor,
An alarm device for transmitting a control signal of a current supplied to the induction heating device to the electromagnetic controller based on the measured value is provided, and the temperature of the cylinder is maintained within a predetermined temperature range by these facilities, and a heater coil is provided. Is characterized in that it can be maintained below a predetermined temperature.
【0008】[0008]
【作用】シリンダブロックの内部の温度を測温体で測定
し、もしその測定温度が所定の範囲をはずれたら、温度
調節器から電磁制御器に制御信号が送信され、誘導加熱
装置のヒータコイルの電流を調節することにより加熱量
が調節される。その結果シリンダブロックの操業温度
は、迅速に所定範囲内に復帰する。Function: The temperature inside the cylinder block is measured by the temperature sensing element, and if the measured temperature deviates from the predetermined range, a control signal is sent from the temperature controller to the electromagnetic controller, and the heater coil of the induction heating device is The amount of heating is adjusted by adjusting the electric current. As a result, the operating temperature of the cylinder block quickly returns to the predetermined range.
【0009】また、誘電により発熱するシリンダブロッ
クの熱は、断熱材によりその外側に配置された誘導加熱
装置のヒータコイルには伝達されない。しかし、ヒータ
コイルの自己発熱に対しヒータコイル表面の温度を測温
体で測定し、その測定温度が設定点に達すると、警報器
から電磁制御器に減量、カットオフ等の制御信号が送信
され、誘導加熱装置への供給電流が制御される。Further, the heat of the cylinder block, which is generated by the dielectric, is not transmitted to the heater coil of the induction heating device arranged outside by the heat insulating material. However, the temperature of the heater coil surface is measured by the temperature sensing element in response to the self-heating of the heater coil, and when the measured temperature reaches the set point, the alarm sends a control signal such as reduction or cutoff to the electromagnetic controller. , The current supplied to the induction heating device is controlled.
【0010】これらによりシリンダの作業温度が所定の
範囲内に維持され、かつ、ヒータコイルの温度も所定値
以下に維持される。As a result, the working temperature of the cylinder is maintained within a predetermined range, and the temperature of the heater coil is maintained below a predetermined value.
【0011】[0011]
【実施例】次に、本発明の実施例について図面を参照し
て説明する。Embodiments of the present invention will now be described with reference to the drawings.
【0012】図1(a)は、本発明の押出機のシリンダ
の加熱装置の一実施例のシリンダブロックBとその誘導
加熱装置Hの概略斜視図、(b)は、その作動原理を模
式的に示す斜視図、図2は、本実施例の加熱制御方式を
示す概略図、図3は本実施例のシリンダおよびコイルの
温度の推移を示すグラフである。FIG. 1 (a) is a schematic perspective view of a cylinder block B and its induction heating device H of an embodiment of a heating device for a cylinder of an extruder according to the present invention, and FIG. 1 (b) is a schematic view of its operating principle. 2 is a schematic view showing the heating control system of this embodiment, and FIG. 3 is a graph showing the temperature changes of the cylinder and coil of this embodiment.
【0013】本発明の押出機のシリンダの加熱装置は、
断面の外縁が角形をなしているシリンダ1内に供給され
た樹脂原料11が加熱、加圧を受けて溶融、混練され成
形用ダイ10から押出される構造を有するシリンダ1に
渦電流を誘導するため、シリンダ1の外面近くに設けら
れて高周波電流が印加される平型のヒータコイル3を有
している。The heating device for the cylinder of the extruder of the present invention comprises:
An eddy current is induced in the cylinder 1 having a structure in which the resin raw material 11 supplied into the cylinder 1 having an outer edge of a cross section is heated, pressurized, melted, kneaded, and extruded from the molding die 10. Therefore, it has a flat heater coil 3 provided near the outer surface of the cylinder 1 and to which a high-frequency current is applied.
【0014】シリンダ1は、図1(a),(b)または
図2から明らかなように二軸式であって水平に配置され
ている。シリンダ1の左端に樹脂原料11を受け入れる
ホッパ9が設けられ右端にプラスチック成形品を押出す
成形用ダイ10が設けられている。シリンダ1は、ほぼ
同じ長さの8つのシリンダブロックB1 〜B8 からな
り、成形用ダイ10とともにそのおのおのに誘導加熱装
置H1 〜H9 が設けられている。The cylinder 1 is of a biaxial type and is horizontally arranged, as is apparent from FIGS. 1 (a), 1 (b) or 2. A hopper 9 for receiving the resin raw material 11 is provided at the left end of the cylinder 1, and a molding die 10 for extruding a plastic molded product is provided at the right end. The cylinder 1 is composed of eight cylinder blocks B 1 to B 8 having substantially the same length, and induction heating devices H 1 to H 9 are provided on each of them together with the molding die 10.
【0015】誘導加熱装置Hは、図1(a)における
右,上,左,下の四方にそれぞれ平型のヒータコイル3
1 ,32 ,33 ,34 が配置され、この4個のヒータコ
イル3 1 〜34 は、2個づつ接続され2組31 ,32 と
33 ,34 になっている。これら2組の各ヒータコイル
31 ,32 ,及び33 ,34 は、2個のL字形のコイル
支持板41 ,42 のそれぞれの内側に支持されている。
そしてコイル支持板41を内側へ通過する4本のコイル
引出線22,23,24,25により、ヒータコイル3
1 と32 間の接続およびヒータコイル31 ,32 と電磁
制御器2間の接続がなされている。ヒータコイル33 ,
34 と対応する電磁制御器2’の関係については上述と
全く同様であるので図示および説明を省略する。The induction heating device H is shown in FIG.
Flat heater coils 3 on the right, top, left, and bottom
1 , 32 , 33 , 3Four Are placed, and these four heater
IL 3 1 ~ 3Four Are connected 2 by 2 and 3 by 31 , 32 When
Three3 , 3Four It has become. These two sets of heater coils
Three1 , 32 , And 33 , 3Four Is two L-shaped coils
Support plate 41 , 42 Is supported inside each of.
And the coil support plate 41Coils passing inward
The heater coil 3 is formed by the lead wires 22, 23, 24, 25.
1 And 32 Connection between and heater coil 31 , 32 And electromagnetic
The connections between the controllers 2 are made. Heater coil 33 ,
ThreeFour The relationship between the corresponding electromagnetic controller 2'and
Since it is exactly the same, illustration and description thereof are omitted.
【0016】シリンダ1は、シリンダブロックBと、誘
導加熱装置Hと、シリンダブロックBからヒータコイル
31 〜34 への熱が伝達されるのを防ぐためその周囲を
囲む断熱材7と、シリンダブロックBの内部のシリンダ
内部温度検出点1aの温度を測定する熱電対50 と、そ
の測定値を受けて電磁制御器2からヒータコイル31〜
34 への供給電流を制御する温度調節器6と、ヒータコ
イル31 〜34 のコイル表面温度検出点3aの温度を測
定する熱電対51 〜54 と、その測定値を受けて電磁制
御器2からコイル31 〜34 への供給電流を制御する警
報器8とが備えられており、これらの働きによりシリン
ダ1のシリンダ内部温度検出点1aの温度が所定の範囲
例えば220℃〜250℃の範囲内に維持され、かつ、
ヒータコイル31 〜34 の温度が所定の温度例えば17
0℃以下に維持されることができるように設定されてい
る。The cylinder 1 includes a cylinder block B, and the induction heating device H, a heat insulating material 7 surrounding the periphery since heat from the cylinder block B to the heater coil 3 1 to 3 4 is prevented from being transmitted, the cylinder thermocouple 5 0 for measuring the temperature inside the cylinder internal temperature detection point 1a of the block B, the heater coil 3 1 to the solenoid control unit 2 receives the measured value
3 and temperature controller 6 for controlling the current supplied to the 4, receives the thermocouple 5 1 to 5 4 for measuring the temperature of the heater coil 3 1 to 3 4 coil surface temperature detecting points 3a, the measurement electromagnetic An alarm device 8 for controlling the current supplied from the controller 2 to the coils 3 1 to 3 4 is provided, and by these functions, the temperature of the cylinder internal temperature detection point 1a of the cylinder 1 falls within a predetermined range, for example, 220 ° C. Maintained within the range of 250 ° C, and
The temperature of the heater coils 3 1 to 3 4 is a predetermined temperature, for example, 17
It is set so that it can be maintained below 0 ° C.
【0017】これは、成形運転温度が220〜250℃
であり、またヒータコイルとなるリッツ線の許容温度が
180℃であって、望ましい使用温度が170℃とされ
ているからである。This is because the molding operation temperature is 220 to 250 ° C.
This is because the litz wire serving as the heater coil has an allowable temperature of 180 ° C. and a desired operating temperature of 170 ° C.
【0018】なお、シリンダ表面温度検出点1bの温度
も不図示の熱電対により測定し、上述のシリンダ1のシ
リンダ内部温度検出点1aの温度およびヒータコイル表
面温度検出点3aの温度の測定値と関連させて管理上の
参考データとしている。この測定データも電磁制御器2
に組み合せるように配設することも可能である。The temperature at the cylinder surface temperature detection point 1b is also measured by a thermocouple (not shown), and the measured values of the temperature at the cylinder internal temperature detection point 1a of the cylinder 1 and the temperature at the heater coil surface temperature detection point 3a are measured. Related data is used as reference data for management. This measurement data is also electromagnetic controller 2
It is also possible to arrange so as to be combined with.
【0019】以上各シリンダブロックB1 〜B8 及び成
形用ダイ10について、同様の構成を代表的に説明して
いる。The same structure is representatively described for each of the cylinder blocks B 1 to B 8 and the molding die 10.
【0020】次に、本実施例の動作については、以上の
設備の構成により、ほぼ明らかであると考えられるので
簡単に述べることとする。Next, the operation of this embodiment will be briefly described because it is considered to be almost clear from the above-mentioned equipment configuration.
【0021】ホッパー9から供給された樹脂原料11は
押出機のシリンダ1に挿入され上流のシリンダブロック
B1 から下流のシリンダブロックB8 に至る間に溶融、
混練され、成形用ダイ10から成形されて押出される
が、この各シリンダブロックB 1 〜B8 および成形用ダ
イ10の温度を所定範囲内に保つための動作は次のとお
りである。The resin raw material 11 supplied from the hopper 9 is
An upstream cylinder block inserted into cylinder 1 of the extruder
B1 Cylinder block B downstream from8 Melts in between,
Kneaded, molded from the molding die 10 and extruded
However, each cylinder block B 1 ~ B8 And molding machine
The operation to keep the temperature of b within the specified range is as follows.
It is Ri.
【0022】温度調節器6により、シリンダブロックB
の作業温度調節範囲を例えば180〜220℃に設定す
る。シリンダブロックBの内部1aの温度を熱電対50
で測定し、もしその温度が設定範囲をはずれたら温度調
節器6から電磁制御器2へ制御信号が送信され、そこ
で、誘導加熱装置Hのヒータコイル31 〜34 の電流を
調節することにより加熱量が調節される。その結果シリ
ンダブロックBの作業温度は、迅速に所定の範囲内に復
帰する。したがって、所定の温度範囲内に維持される。The cylinder block B is controlled by the temperature controller 6.
The working temperature control range is set to, for example, 180 to 220 ° C. Thermocouple temperature inside 1a of the cylinder block B 5 0
If the temperature is out of the set range, a control signal is transmitted from the temperature controller 6 to the electromagnetic controller 2, and by adjusting the current of the heater coils 3 1 to 3 4 of the induction heating device H, The heating amount is adjusted. As a result, the working temperature of the cylinder block B quickly returns to the predetermined range. Therefore, it is maintained within a predetermined temperature range.
【0023】また、ヒータコイル31 〜34 のコイル線
をなすリッツ線の許容温度は180℃であるので、使用
温度を170℃以下に維持することとしている。誘電に
より発熱するシリンダブロックBの熱は、周囲の断熱材
7があるのでヒータコイル3 1 〜34 へは伝達されな
い。しかし、ヒータコイル31 〜34 は自己発熱により
温度上昇するので、コイル表面温度検出点3aの温度を
熱電対51 〜54 により測定し、もし170℃に達した
ら、警報器8から電磁制御器2へ制御信号が送信され、
ヒータコイル31 〜34 への電流を減少させるあるいは
遮断する。これでコイルの温度は170℃以下に維持さ
れる。Further, the heater coil 31 ~ 3Four Coil wire
Since the allowable temperature of the litz wire is 180 ° C, use
The temperature is to be maintained below 170 ° C. Dielectrically
The heat of the cylinder block B that generates more heat is due to the surrounding heat insulating material.
Heater coil 3 because there is 7 1 ~ 3Four Is not transmitted to
Yes. However, the heater coil 31 ~ 3Four Is due to self-heating
Since the temperature rises, the temperature of the coil surface temperature detection point 3a
Thermocouple 51 ~ 5Four Measured by, if reached 170 ℃
, A control signal is transmitted from the alarm device 8 to the electromagnetic controller 2,
Heater coil 31 ~ 3Four Reduce the current to or
Cut off. This keeps the coil temperature below 170 ° C.
Be done.
【0024】以上の動作は、必要に応じて各シリンダブ
ロックB1 〜B8 及び成形用ダイ10ならびに各誘導加
熱装置H1 〜H9 において、個別に行なうことが可能で
ある。The above operations can be individually performed in each of the cylinder blocks B 1 to B 8 and the molding die 10 and each of the induction heating devices H 1 to H 9 as required.
【0025】図3には、起動加熱時を主体としてこれら
の温度が制御された状態がグラフで示されている。この
ように適正、安定操作が得られる。FIG. 3 is a graph showing a state in which these temperatures are controlled mainly at the time of start-up heating. In this way, proper and stable operation can be obtained.
【0026】[0026]
【発明の効果】以上説明したように本発明は、押出機の
シリンダの外面に断熱材を設け、シリンダ内部の温度が
所定範囲をはずれたときヒータコイルへ供給される電流
を制御する信号を電磁制御器へ送信する温度調節器、ヒ
ータコイルの温度が所定温度以上になったときヒータコ
イルへ供給される電流を制御する信号を電磁制御器へ送
信する警報器を設けることにより、シリンダ内部温度が
所定の温度範囲内に維持され、かつヒータコイルの温度
が所定の温度以下に維持されることができ、かつ、他の
冷却方法のための大きな設備の設置が不要である押出機
のシリンダの加熱装置を提供できる効果がある。As described above, according to the present invention, a heat insulating material is provided on the outer surface of the cylinder of an extruder, and a signal for controlling the current supplied to the heater coil when the temperature inside the cylinder deviates from a predetermined range is electromagnetic. By providing a temperature controller that sends to the controller and an alarm that sends a signal that controls the current supplied to the heater coil to the electromagnetic controller when the temperature of the heater coil exceeds a predetermined temperature, the cylinder internal temperature is Heating of the cylinder of an extruder, which can be maintained within a predetermined temperature range, the temperature of the heater coil can be maintained below a predetermined temperature, and there is no need to install large equipment for other cooling methods. There is an effect that the device can be provided.
【図1】(a)は、本発明の押出機のシリンダの加熱装
置の一実施例のシリンダブロックBとその誘導加熱装置
Hの概略斜視図であり、(b)は、その作動原理を模式
的に示す斜視図である。FIG. 1 (a) is a schematic perspective view of a cylinder block B and its induction heating device H of an embodiment of a heating device for a cylinder of an extruder of the present invention, and FIG. It is a perspective view which shows typically.
【図2】本実施例の加熱制御方式を示す概略図である。FIG. 2 is a schematic diagram showing a heating control system of the present embodiment.
【図3】本実施例のシリンダおよびコイルの温度の推移
を示すグラフである。FIG. 3 is a graph showing changes in temperature of a cylinder and a coil according to this embodiment.
【図4】従来の加熱装置の一実施例の冷却ファンを有す
る場合の概略斜視図である。FIG. 4 is a schematic perspective view of a conventional heating device including a cooling fan.
1 シリンダ 1a,1a1 〜1a9 シリンダ内部温度検出点 1b,1b1 〜1b9 シリンダ表面温度検出点 2,2’,21 〜29 電磁制御器 3,31 ,32 ,33 ,34 ,53 ヒータコイル 3a,3a1 〜3a9 コイル表面温度検出点 41 ,42 コイル支持板 50 ,51 ,52 ,53 ,54 ,55 測温体(熱電
対) 6 温度調節器 7,57 断熱材 8,81 〜89 警報器 9 ホッパ 10 成形用ダイ 11 樹脂原料 22〜25,72,75 コイル引出線 76 冷却ファン 77 空気通路 78 空気 B,B1 〜B8 ,B51 シリンダブロック H,H1 〜H9 ,H51 誘導加熱装置 S 電源1 cylinder 1a, 1a 1 to 1A 9 cylinder internal temperature detecting points 1b, 1b 1 ~1b 9 cylinder surface temperature detecting points 2,2 ', 2 1 to 2 9 solenoid controller 3, 3 1, 3 2, 3 3, 3 4, 53 heater coil 3a, 3a 1 to 3 A 9 coil surface temperature detection point 4 1, 4 2 coil supporting plate 5 0, 5 1, 5 2, 5 3, 5 4, 55 temperature sensing element (thermocouple) 6 temperature controller 7 and 57 thermal insulator 8,8 1-8 9 alarm 9 hopper 10 molding die 11 resin material 22~25,72,75 coil lead wire 76 cooling fan 77 air passage 78 air B, B 1 ~B 8 , B 51 Cylinder block H, H 1 ~ H 9 , H 51 Induction heating device S power supply
Claims (2)
内に供給された樹脂が加熱、加圧され、溶融、混練され
て成形用ダイ(10)から押出される構造を有する押出
機の前記シリンダ(1)に渦電流を誘導するため、前記
シリンダ(1)の外面近くに設けられて高周波電流が印
加される平型のヒータコイル(3)を有する誘導加熱装
置(H)による押出機のシリンダの加熱方法において、 シリンダブロック(B)のシリンダ内部温度検出点(1
a)の温度を測定し、その測定値に基づいて前記誘導加
熱装置(H)への供給電流を制御することにより、前記
シリンダブロック(B)の温度を所定の範囲内に維持
し、 加熱された前記シリンダブロック(B)から前記ヒータ
コイル(3)への熱伝達が遮断され、かつ前記ヒータコ
イル(3)のコイル表面温度検出点(3a)の温度を測
定し、その測定値に基づいて前記誘導加熱装置(H)へ
の供給電流を制御することにより前記ヒータコイル
(3)の温度を所定の温度以下に維持する方法を含むこ
とを特徴とする、押出機のシリンダの加熱方法。1. A cylinder (1) having a rectangular outer edge in cross section.
In order to induce an eddy current in the cylinder (1) of the extruder having a structure in which the resin supplied therein is heated, pressurized, melted, kneaded, and extruded from the molding die (10), the cylinder ( In the method of heating a cylinder of an extruder by an induction heating device (H) having a flat heater coil (3) provided near the outer surface of 1) to which a high-frequency current is applied, the temperature inside the cylinder of the cylinder block (B) Detection point (1
By measuring the temperature of a) and controlling the supply current to the induction heating device (H) based on the measured value, the temperature of the cylinder block (B) is maintained within a predetermined range and heated. The heat transfer from the cylinder block (B) to the heater coil (3) is cut off, and the temperature at the coil surface temperature detection point (3a) of the heater coil (3) is measured, and based on the measured value. A method for heating a cylinder of an extruder, comprising a method of maintaining a temperature of the heater coil (3) at a predetermined temperature or lower by controlling a current supplied to the induction heating device (H).
内に供給された樹脂が加熱、加圧され、溶融、混練され
て成形用ダイ(10)から押出される構造を有する押出
機の前記シリンダ(1)に渦電流を誘導するため、前記
シリンダ(1)の外面近くに設けられて高周波電流が印
加される平型のヒータコイル(3)を有する誘導加熱装
置(H)による押出機のシリンダの加熱装置において、 加熱されたシリンダブロック(B)から前記ヒータコイ
ル(3)への熱伝達を防ぐための断熱材(7)と、前記
誘導加熱装置(H)へ電流を供給する電磁制御器(2)
と、前記シリンダブロック(B)のシリンダ内部温度検
出点(1a)の温度を測定する測温体(50 )と、その
測定値に基づいて前記誘導加熱装値(H)への供給電流
の制御信号を電磁制御器(2)へ送信する温度調節器
(6)と、前記ヒータコイル(3)のコイル表面温度検
出点(3a)の温度を測定する測温体(51 〜54 )
と、その測定値に基づいて前記誘導加熱装置(H)への
供給電流の制御信号を前記電磁制御器(2)へ送信する
警報器(8)とが備えられ、これらの設備により前記シ
リンダ(1)の温度が所定の温度範囲内に維持され、か
つ前記ヒータコイル(3)の温度が所定の温度以下に維
持されることができることを特徴とする、押出機のシリ
ンダの加熱装置。2. A cylinder (1) having a rectangular outer edge in cross section.
In order to induce an eddy current in the cylinder (1) of the extruder having a structure in which the resin supplied therein is heated, pressurized, melted, kneaded, and extruded from the molding die (10), the cylinder ( In a heating device for a cylinder of an extruder by an induction heating device (H) having a flat heater coil (3) provided near the outer surface of 1) and to which a high-frequency current is applied, from a heated cylinder block (B) A heat insulating material (7) for preventing heat transfer to the heater coil (3) and an electromagnetic controller (2) for supplying a current to the induction heating device (H).
If, temperature element for measuring the temperature of the cylinder internal temperature detection points of the cylinder block (B) (1a) and (5 0), the supply current of the to the induction heating-up Reel (H) based on the measurement value temperature controller for transmitting a control signal electromagnetic controller to (2) and (6), said temperature sensing element to measure the temperature of the coil surface temperature detection points of the heater coil (3) (3a) (5 1 ~5 4)
And an alarm device (8) for transmitting a control signal of a current supplied to the induction heating device (H) to the electromagnetic controller (2) based on the measured value, and the cylinder ( A heating device for a cylinder of an extruder, wherein the temperature of 1) can be maintained within a predetermined temperature range, and the temperature of the heater coil (3) can be maintained below a predetermined temperature.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP5146160A JP2661861B2 (en) | 1993-06-17 | 1993-06-17 | Extruder cylinder heating method and apparatus |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP5146160A JP2661861B2 (en) | 1993-06-17 | 1993-06-17 | Extruder cylinder heating method and apparatus |
Publications (2)
Publication Number | Publication Date |
---|---|
JPH071554A true JPH071554A (en) | 1995-01-06 |
JP2661861B2 JP2661861B2 (en) | 1997-10-08 |
Family
ID=15401493
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP5146160A Expired - Fee Related JP2661861B2 (en) | 1993-06-17 | 1993-06-17 | Extruder cylinder heating method and apparatus |
Country Status (1)
Country | Link |
---|---|
JP (1) | JP2661861B2 (en) |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US6606018B2 (en) | 2001-03-26 | 2003-08-12 | Takamisawa Electric Co., Ltd. | Electromagnetic relay |
JP2012236349A (en) * | 2011-05-12 | 2012-12-06 | Japan Steel Works Ltd:The | Method of controlling temperature of heater and temperature control device using the same |
-
1993
- 1993-06-17 JP JP5146160A patent/JP2661861B2/en not_active Expired - Fee Related
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US6606018B2 (en) | 2001-03-26 | 2003-08-12 | Takamisawa Electric Co., Ltd. | Electromagnetic relay |
JP2012236349A (en) * | 2011-05-12 | 2012-12-06 | Japan Steel Works Ltd:The | Method of controlling temperature of heater and temperature control device using the same |
Also Published As
Publication number | Publication date |
---|---|
JP2661861B2 (en) | 1997-10-08 |
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