JP2011148205A - Method and device for measuring tip pressure of extruder - Google Patents

Method and device for measuring tip pressure of extruder Download PDF

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Publication number
JP2011148205A
JP2011148205A JP2010011838A JP2010011838A JP2011148205A JP 2011148205 A JP2011148205 A JP 2011148205A JP 2010011838 A JP2010011838 A JP 2010011838A JP 2010011838 A JP2010011838 A JP 2010011838A JP 2011148205 A JP2011148205 A JP 2011148205A
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reduction gear
screw
gear mechanism
linear motion
load
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Shinya Tokunaga
真也 徳永
Yukio Fukuchi
幸夫 福地
Kazuhiro Kodate
一浩 小舘
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Japan Steel Works Ltd
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Japan Steel Works Ltd
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    • 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
    • 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
    • B29C48/36—Means for plasticising or homogenising the moulding material or forcing it through the nozzle or die
    • B29C48/395—Means 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
    • B29C48/40—Means 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
    • 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
    • B29C2948/92514—Pressure

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Processing And Handling Of Plastics And Other Materials For Molding In General (AREA)
  • Extrusion Moulding Of Plastics Or The Like (AREA)

Abstract

<P>PROBLEM TO BE SOLVED: To provide a method and device for measuring tip pressure of extruder capable of measuring a thrust load value irrespective of the kind of resin material by receiving the thrust load applied to a screw via the thrust bearing of a reduction gear disposed on the rear part of a cylinder internally equipped with the screw, with a load converter. <P>SOLUTION: In the method and device for measuring tip pressure of extruder, a reduction gear mechanism (23) is disposed on the rear part of the cylinder (2A) equipped with the screw (22), the load converter (28) is arranged on a translation shaft (25) disposed on the screw (22) via a reduction gear group (24), via the thrust bearing, and the thrust load (S) applied onto the screw (22) is measured with the load converter (28). <P>COPYRIGHT: (C)2011,JPO&INPIT

Description

本発明は、押出機先端圧力測定方法及び装置に関し、特に、スクリュを内設したシリンダの後部に設けられた減速機のスラストベアリングを介して受けるスクリュのスラスト荷重を荷重変換器で受けることにより、樹脂材料の種類を問わずスラスト荷重値の測定を可能とするための新規な改良に関する。   The present invention relates to an extruder tip pressure measuring method and apparatus, and in particular, by receiving a thrust load of a screw received via a thrust bearing of a reducer provided at a rear portion of a cylinder provided with a screw with a load converter, The present invention relates to a novel improvement for enabling measurement of a thrust load value regardless of the type of resin material.

従来、用いられいたこの種の押出機先端圧力測定方法としては、例えば、特許文献１及び２の構成を挙げることができ、ここでは、特許文献１の構成を図２及び図３と共に説明する。   Conventionally, as this kind of extruder tip pressure measuring method used, for example, configurations of Patent Documents 1 and 2 can be cited, and here, the configuration of Patent Document 1 will be described together with FIGS. 2 and 3.

図３において、符号１で示されるものは押出装置であり、この押出装置１はスクリュ式押出機２、ダイバータバルブ３、連結管４、ギアポンプ５、濾過装置６及び造粒装置７を上流から下流へ順次連結して構成されている。   In FIG. 3, what is indicated by reference numeral 1 is an extrusion device, and this extrusion device 1 includes a screw extruder 2, a diverter valve 3, a connecting pipe 4, a gear pump 5, a filtration device 6 and a granulation device 7 from upstream to downstream. It is configured by sequentially connecting to.

前記スクリュ式押出機２はシリンダ２Ａ内にスクリュ片端支持で構成され、図示しないスクリュが減速機２ａを介して駆動モータ２ｂに連結されている。このシリンダ２Ａの上流側端部には、シリンダ２Ａ内へ合成樹脂原料を供給するホッパ２ｃが設けられている。前記ギアポンプ５には図示しないギアポンプ用駆動装置、前記造粒装置７には図示しない造粒装置用駆動装置がそれぞれ独立して回転駆動可能に設けられ、前記濾過装置６には濾過用スクリーンを交換するための図示しない駆動装置が設けられている。また、スクリュ式押出機２の先端の吐出端１０には第１圧力計測点Ａとして、シリンダ先端内の流路圧力を計測して計測値を図示しない制御装置へ伝送可能な第１圧力伝送器８が設けられ、前記連結管４にはギアポンプ５の吸入端１１すなわちギアポンプ５のギア５Ａの直前の第２圧力計測点Ｂとして、連結管４内の流路圧力を計測して計測値を図示しない制御装置へ伝送可能な第２圧力伝送器９が設けられている。   The screw type extruder 2 is constituted by a screw one end support in a cylinder 2A, and a screw (not shown) is connected to a drive motor 2b via a speed reducer 2a. A hopper 2c for supplying a synthetic resin material into the cylinder 2A is provided at the upstream end of the cylinder 2A. The gear pump 5 is provided with a gear pump driving device (not shown), and the granulating device 7 is provided with a granulating device driving device (not shown) so as to be independently rotatable. The filtration device 6 has a filtration screen exchanged. A driving device (not shown) is provided. Further, a first pressure transmitter capable of measuring a flow path pressure in the cylinder tip and transmitting the measured value to a control device (not shown) as a first pressure measurement point A at the discharge end 10 at the tip of the screw extruder 2. 8 is provided, and the connection pipe 4 measures the flow path pressure in the connection pipe 4 as a second pressure measurement point B immediately before the suction end 11 of the gear pump 5, that is, the gear 5 </ b> A of the gear pump 5. A second pressure transmitter 9 is provided that can transmit to the control device that does not.

以上のように構成された押出装置１において、合成樹脂原料は以下のように加工処理される。すなわち、スクリュ式押出機２のスクリュが減速機２ａを介して駆動モータ２ｂにより回転駆動され、ギアポンプ５が駆動され、造粒装置７がそれぞれ所定条件により運転されている状態で、スクリュ式押出機２において、その上流部のホッパ２ｃからシリンダ２Ａ内へ合成樹脂原料が連続的に供給される。この合成樹脂原料は、スクリュ式押出機２により溶融混練され、ダイバータバルブ３および連結管４を経てギアポンプ５へ押出され、ギアポンプ５により昇圧され、濾過装置６により不純物を除去され、造粒装置７によりペレット状の樹脂材料に加工される。   In the extrusion apparatus 1 configured as described above, the synthetic resin raw material is processed as follows. That is, the screw extruder 2 is driven in a state where the screw of the screw extruder 2 is rotationally driven by the drive motor 2b via the speed reducer 2a, the gear pump 5 is driven, and the granulating device 7 is operated under predetermined conditions. 2, the synthetic resin raw material is continuously supplied from the upstream hopper 2c into the cylinder 2A. This synthetic resin raw material is melted and kneaded by the screw type extruder 2, extruded to the gear pump 5 through the diverter valve 3 and the connecting pipe 4, boosted by the gear pump 5, impurities removed by the filtering device 6, and the granulating device 7 Is processed into a pellet-shaped resin material.

このような押出装置１の連続した工程による加工処理において、第１圧力伝送器８及び第２圧力伝送器９により、それぞれ第１圧力計測点Ａ及び第２圧力計測点Ｂにおける流路内の溶融樹脂圧力Ｐａ及びＰｂが計測され、この計測圧力が図示しない制御装置へ伝送され、図４に示すように、ギアポンプ５の直前の圧力予測点Ｓの圧力が予測され、予測圧力がギア５Ａ直前を溶融樹脂原料で充満させるためのギア直前設定樹脂圧力Ｐｓになるように、ギアポンプ５の運転が制御され、ギアポンプ５の回転数が制御される。また、図４では３つの測定結果が樹脂圧力勾配として示されているが、何れの場合も、ギア直前設定樹脂圧力Ｐｓとなるように前記制御装置によって制御される。   In such processing in the continuous process of the extrusion apparatus 1, the first pressure transmitter 8 and the second pressure transmitter 9 cause melting in the flow path at the first pressure measurement point A and the second pressure measurement point B, respectively. Resin pressures Pa and Pb are measured, and these measured pressures are transmitted to a control device (not shown). As shown in FIG. 4, the pressure at the pressure prediction point S immediately before the gear pump 5 is predicted, and the predicted pressure is immediately before the gear 5A. The operation of the gear pump 5 is controlled so that the resin pressure Ps immediately before the gear for filling with the molten resin material is reached, and the rotation speed of the gear pump 5 is controlled. In FIG. 4, three measurement results are shown as resin pressure gradients. In any case, the control device controls the resin pressure gradient Ps immediately before the gear.

特開２００６−３５４５７号公報JP 2006-35457 A

従来の押出機先端圧力測定方法及び装置は、以上のように構成されていたため、次のような課題が存在していた。
すなわち、通常の硬度を有する樹脂材料を混練して押出した場合には、圧力伝送器の測定部は樹脂圧力を正常に測定することができるが、非常に硬度の高い材料を押出機により混練した場合、圧力伝送器の測定部が直接材料に接触するため、摩耗してしまい、測定が不可能となってしまうことがあった。 Since the conventional extruder tip pressure measuring method and apparatus are configured as described above, the following problems exist.
That is, when a resin material having a normal hardness is kneaded and extruded, the measurement unit of the pressure transmitter can measure the resin pressure normally, but a very hard material is kneaded by an extruder. In this case, since the measurement part of the pressure transmitter is in direct contact with the material, it may be worn out and measurement may be impossible.

本発明による押出機先端圧力測定方法は、シリンダ内に回転自在に設けられたスクリュと、前記シリンダの後端に設けられ前記スクリュを回転駆動するための減速ギア機構と、前記減速ギア機構に接続され前記減速ギア機構を駆動するためのモータと、前記減速ギア機構の後部に設けられると共に前記スクリュに直接又は間接的に接して軸方向に直動する直動軸と、前記減速ギア機構の後部に設けられ前記直動軸を直動自在に支持するためのスラストベアリングと、前記スラストベアリングの後部に配設され前記直動軸の端部と接する荷重変換器と、を用い、前記スクリュに付加されるスラスト荷重を前記直動軸を介して前記荷重変換器により測定する方法であり、また、前記減速ギア機構の減速ギア機構ケーシングと一体に形成されて突出する筒状又はカップ状のケース体内に、前記スラストベアリング及び荷重変換器が設けられている方法であり、また、本発明による押出機先端圧力測定装置は、シリンダ内に回転自在に設けられたスクリュと、前記シリンダの後端に設けられ前記スクリュを回転駆動するための減速ギア機構と、前記減速ギア機構に接続され前記減速ギア機構を駆動するためのモータと、前記減速ギア機構の後部に設けられると共に前記スクリュに直接又は間接的に接して軸方向に直動する直動軸と、前記減速ギア機構の後部に設けられ前記直動軸を直動自在に支持するためのスラストベアリングと、前記スラストベアリングの後部に配設され前記直動軸の端部と接する荷重変換器と、よりなり、
前記スクリュに付加されるスラスト荷重を前記直動軸を介して前記荷重変換器により測定する構成であり、また、前記減速ギア機構の減速ギア機構ケーシングと一体に形成されて突出する筒状又はカップ状のケース体内に、前記スラストベアリング及び荷重変換器が設けられている構成である。 An extruder tip pressure measuring method according to the present invention includes a screw rotatably provided in a cylinder, a reduction gear mechanism provided at a rear end of the cylinder for rotationally driving the screw, and connected to the reduction gear mechanism. A motor for driving the reduction gear mechanism; a linear motion shaft provided at a rear portion of the reduction gear mechanism and directly or indirectly in contact with the screw; and a rear portion of the reduction gear mechanism And a load bearing disposed at a rear portion of the thrust bearing and in contact with an end portion of the linear motion shaft, and added to the screw. A thrust load that is measured by the load converter via the linear motion shaft, and is formed integrally with a reduction gear mechanism casing of the reduction gear mechanism and protrudes The thrust bearing and the load converter are provided in a cylindrical or cup-shaped case, and the extruder tip pressure measuring device according to the present invention is a screw provided rotatably in the cylinder. A reduction gear mechanism provided at the rear end of the cylinder for driving the screw to rotate, a motor connected to the reduction gear mechanism for driving the reduction gear mechanism, and a rear part of the reduction gear mechanism. A linear motion shaft that is directly or indirectly in contact with the screw and linearly moves in an axial direction, a thrust bearing that is provided at a rear portion of the reduction gear mechanism and that supports the linear motion shaft in a freely movable manner, A load transducer disposed at the rear of the thrust bearing and in contact with the end of the linear motion shaft;
A cylindrical or cup that is configured to measure a thrust load applied to the screw by the load converter via the linear motion shaft, and that is integrally formed with a reduction gear mechanism casing of the reduction gear mechanism and protrudes The thrust bearing and the load converter are provided in a cylindrical case body.

本発明による押出機先端圧力測定方法及び装置は、以上のように構成されているため、次のような効果を得ることができる。
すなわち、シリンダ内に回転自在に設けられたスクリュと、前記シリンダの後端に設けられ前記スクリュを回転駆動するための減速ギア機構と、前記減速ギア機構に接続され前記減速ギア機構を駆動するためのモータと、前記減速ギア機構の後部に設けられると共に前記スクリュに直接又は間接的に接して軸方向に直動する直動軸と、前記減速ギア機構の後部に設けられ前記直動軸を直動自在に支持するためのスラストベアリングと、前記スラストベアリングの後部に配設され前記直動軸の端部と接する荷重変換器と、を用い、前記スクリュに付加されるスラスト荷重を前記直動軸を介して前記荷重変換器により測定することにより、従来用いていたシリンダの先端内の圧力測定装置をなくすことができると共に、減速装置に設けた荷重変換器によってスクリュのスラスト荷重を測定し、得られた測定荷重値により樹脂圧力を換算することができ、従来は不可能となっていた硬度の高い樹脂材料についても、荷重変換器が直接樹脂材料に接することがないため、樹脂の硬軟及び種類に関係なく樹脂圧力を正確に測定することができる。
さらに、減速ギア機構の減速ギア機構ケーシングと一体に形成されて突出する筒状又はカップ状のケース体内に、前記スラストベアリング及び荷重変換器が設けられていることにより、荷重変換器は外部との接触を極めて少なくすることができ、耐久性を高めることができる。 Since the extruder tip pressure measuring method and apparatus according to the present invention are configured as described above, the following effects can be obtained.
That is, a screw rotatably provided in the cylinder, a reduction gear mechanism provided at the rear end of the cylinder for rotationally driving the screw, and a drive connected to the reduction gear mechanism for driving the reduction gear mechanism Motor, a linear motion shaft that is directly or indirectly in contact with the screw and linearly moves in the axial direction, and a linear motion shaft that is provided at the rear portion of the reduction gear mechanism. A thrust bearing that is movably supported; and a load converter that is disposed at a rear portion of the thrust bearing and is in contact with an end of the linear motion shaft. By using the load transducer to measure the pressure, the pressure measuring device in the tip of the cylinder used in the past can be eliminated, and the load conversion provided in the speed reducer By measuring the thrust load of the screw, the resin pressure can be converted from the measured load value, and the load transducer is in direct contact with the resin material even for resin materials with high hardness, which has been impossible in the past. Therefore, the resin pressure can be accurately measured regardless of the hardness and type of the resin.
Further, the thrust bearing and the load converter are provided in a cylindrical or cup-shaped case body that is integrally formed with the reduction gear mechanism casing of the reduction gear mechanism, and thus the load converter is connected to the outside. Contact can be extremely reduced, and durability can be enhanced.

本発明による押出機先端圧力測定方法及び装置を示す概略平面構成図である。It is a schematic plane block diagram which shows the extruder tip pressure measuring method and apparatus by this invention. 図１の下面から見た場合の概略拡大断面図である。It is a general | schematic expanded sectional view at the time of seeing from the lower surface of FIG. 従来の押出機先端圧力測定方法及び装置を示す構成図である。It is a block diagram which shows the conventional extruder tip pressure measuring method and apparatus. 図３における溶融合成樹脂原料圧力線図である。It is a fusion | melting synthetic resin raw material pressure diagram in FIG.

本発明は、スクリュを内設したシリンダの後部に設けられた減速機のスラストベアリングを介して受けるスクリュのスラスト荷重をロードセルで受けることにより、樹脂材料の種類を問わずスラスト荷重値の測定を可能とする押出機先端圧力測定方法及び装置を提供することを目的とする。   The present invention can measure the thrust load value regardless of the type of resin material by receiving the thrust load of the screw received through the thrust bearing of the reducer provided at the rear of the cylinder with the screw in the load cell. It is an object of the present invention to provide an extruder tip pressure measuring method and apparatus.

以下、図面と共に本発明による押出機先端圧力測定方法及び装置の好適な実施の形態について説明する。
尚、従来例と同一又は同等部分については、同一符号を用いて説明する。
図１及び図２において、符号１で示されるものは、押出機１を構成するためのシリンダ２Ａであり、このシリンダ２Ａには樹脂原料を供給するためのホッパー２０が設けられている。 DESCRIPTION OF EMBODIMENTS Hereinafter, preferred embodiments of an extruder tip pressure measuring method and apparatus according to the present invention will be described with reference to the drawings.
Note that the same or equivalent parts as in the conventional example will be described using the same reference numerals.
1 and 2, what is indicated by reference numeral 1 is a cylinder 2A for constituting the extruder 1, and a hopper 20 for supplying a resin material is provided in the cylinder 2A.

前記シリンダ２Ａ内の内腔２１内には、一対のスクリュ２２が互いに噛み合い又は非噛み合い状態で内設され、前述の二軸の構成のみに限らず、図示しない一軸構成も適用することができる。
前記シリンダ２Ａの後端２Ｂ側には、周知の減速ギア機構２３を有する減速装置２ａが設けられ、この減速ギア機構２３の減速ギア機構ケーシング２３Ａが前記後端２Ｂに接続されている。 A pair of screws 22 are provided in the inner cavity 21 in the cylinder 2A so as to engage or disengage with each other, and not only the above-described two-axis configuration but also a single-axis configuration (not shown) can be applied.
A reduction gear 2a having a known reduction gear mechanism 23 is provided on the rear end 2B side of the cylinder 2A, and a reduction gear mechanism casing 23A of the reduction gear mechanism 23 is connected to the rear end 2B.

前記減速ギア機構２３内には前記モータ２ｂの回転を減速してスクリュ２２を回転するための減速歯車群２４が設けられており、この減速ギア機構２３の後部２３Ａから後方へ突出する直動軸２５が直動自在に設けられている。   A reduction gear group 24 for reducing the rotation of the motor 2b and rotating the screw 22 is provided in the reduction gear mechanism 23, and a linear motion shaft that protrudes rearward from a rear portion 23A of the reduction gear mechanism 23. 25 is provided so as to be freely movable.

前記スクリュ２２の後端は、前記減速歯車群２４を介して回転されると共に、図示しない周知の接続部材（例えば、回転を伝達せずにストロークのみを伝えるジョイント等からなる）を介して前記直動軸２５に接し、スクリュ２２が溶融樹脂によるスラスト荷重を受けた場合に前記直動軸２５をスクリュ２２が付勢して直動させるように構成されている。尚、この場合、スクリュ２２の直動を許容できるように、減速歯車群２４の歯車は、周知のように、軸方向に長い歯を用いる必要がある。
従って、前記スクリュ２２の後端と直動軸２５とは、前記接続部材を用いた間接的な構成と、この接続部材を用いないでグリス等によりスクリュ２２の端面と直動軸２５の端面とを直接接触させることも可能である。
尚、前述の直動軸２５は、図示した一対の二軸スクリュ構成に限らず、一軸の単軸スクリュ構成として一軸の直動軸２５を用いる構成とすることもできる。 The rear end of the screw 22 is rotated through the speed reduction gear group 24 and is connected to the straight line through a well-known connecting member (not shown) (for example, a joint that transmits only the stroke without transmitting the rotation). When the screw 22 is in contact with the moving shaft 25 and receives a thrust load from the molten resin, the screw 22 urges the linear moving shaft 25 to move linearly. In this case, it is necessary to use long teeth in the axial direction for the gears of the reduction gear group 24 so that the linear movement of the screw 22 can be allowed.
Therefore, the rear end of the screw 22 and the linear motion shaft 25 are an indirect configuration using the connection member, and an end surface of the screw 22 and an end surface of the linear motion shaft 25 by grease or the like without using the connection member. Can also be brought into direct contact.
The above-described linear motion shaft 25 is not limited to the pair of twin-screw configurations shown in the figure, and a single-axis linear motion shaft 25 may be used as a single-axis single-screw configuration.

前記減速ギア機構２３の減速ギア機構ケーシング２３Ａの後部２３Ａａには、この減速ギア機構ケーシング２３Ａと一体でかつ筒状又はカップ状に突出して形成されたケース体２６が形成され、このケース体２６内には、スラストベアリング２７及びロードセンサである荷重変換器２８が直列状に内設されており、前記直動軸２５の径小軸２５ａがスラストベアリング２７を貫通して前記荷重変換器２８に当接して軸方向に付勢するように構成されている。   The rear portion 23Aa of the speed reduction gear mechanism casing 23A of the speed reduction gear mechanism 23 is formed with a case body 26 that is formed integrally with the speed reduction gear mechanism casing 23A and protrudes in a cylindrical or cup shape. A thrust bearing 27 and a load converter 28 which is a load sensor are provided in series, and a small-diameter shaft 25a of the linear motion shaft 25 passes through the thrust bearing 27 and contacts the load converter 28. It is configured to contact and urge in the axial direction.

次に、動作について述べる。前述の構成において、前記シリンダ２Ａを図示しないヒータによって予め加熱し、所定の温度に到達した段階で前記ホッパー２０からシリンダ２Ａ内に樹脂原料を供給すると、すでに、モータ２ｂ及び減速装置２ａを介してスクリュ２２が回転状態であるため、シリンダ２Ａ内の樹脂原料は溶融攪拌されつつ、シリンダ２Ａの先端に設けられたダイス（図示せず）側に搬送されて、このダイスから造粒機（図示せず）側へストランドとして吐出されるが、この際、スクリュ２２は混練しシリンダ２Ａ内に滞留している溶融樹脂によって圧力すなわちスラスト荷重Ｓを受け、同時に減速装置２ａすなわち減速ギア機構にこのスラスト荷重Ｓが加わる。   Next, the operation will be described. In the above-described configuration, when the cylinder 2A is preheated by a heater (not shown) and the resin raw material is supplied from the hopper 20 into the cylinder 2A when the temperature reaches a predetermined temperature, the cylinder 2A is already passed through the motor 2b and the speed reducer 2a. Since the screw 22 is in a rotating state, the resin raw material in the cylinder 2A is conveyed to a die (not shown) provided at the tip of the cylinder 2A while being melted and stirred, and from this die, a granulator (not shown). In this case, the screw 22 is kneaded and receives pressure, that is, thrust load S by the molten resin staying in the cylinder 2A, and at the same time, the thrust load is applied to the reduction gear 2a, that is, the reduction gear mechanism. S is added.

前述の場合、このスラスト荷重Ｓは、前記直動軸２５を経てスラストベアリング２７に伝わり、このスラストベアリング２７の直動側に結合している前記径小軸２５ａが荷重変換器２８を付勢するため、この荷重変換器２８からスラスト荷重Ｓに応じた荷重値２８ａが出力される。
前記荷重値２８ａを圧力に変換することにより、シリンダ２Ａ内の溶融樹脂の樹脂圧力の値を得ることができ、この圧力の値を用いてモータ２ｂの回転を制御し、溶融混練の状態を制御することができる。
従って、本発明による押出機先端圧力測定方法においては、溶融混練するための樹脂の種類に関係なくスラスト荷重Ｓに基づく圧力測定を確実に行うことができる。 In the above case, the thrust load S is transmitted to the thrust bearing 27 via the linear motion shaft 25, and the small diameter shaft 25a coupled to the linear motion side of the thrust bearing 27 urges the load converter 28. Therefore, the load value 28a corresponding to the thrust load S is output from the load converter 28.
By converting the load value 28a into a pressure, the value of the resin pressure of the molten resin in the cylinder 2A can be obtained, and the rotation of the motor 2b is controlled using the value of the pressure to control the melt kneading state. can do.
Therefore, in the extruder tip pressure measuring method according to the present invention, pressure measurement based on the thrust load S can be reliably performed regardless of the type of resin for melt kneading.

本発明による押出機先端圧力測定方法及び装置は、単軸、二軸押出機の他に、射出及び中空成形機のシリンダにも適用が可能である。   The extruder tip pressure measuring method and apparatus according to the present invention can be applied not only to single-screw and twin-screw extruders but also to cylinders of injection and hollow molding machines.

１ 押出機
Ｓ スラスト荷重
２Ａ シリンダ
２Ｂ 後端
２ａ 減速装置
２ｂ モータ
２０ ホッパー
２１ 内腔
２２ スクリュ
２３ 減速ギア機構
２３Ａ 減速ギア機構ケーシング
２３Ａａ 後部
２４ 減速歯車群
２５ 直動軸
２５ａ 径小軸
２６ ケース体
２７ スラストベアリング
２８ 荷重変換器
２８ａ 荷重値 DESCRIPTION OF SYMBOLS 1 Extruder S Thrust load 2A Cylinder 2B Rear end 2a Reduction gear 2b Motor 20 Hopper 21 Lumen 22 Screw 23 Reduction gear mechanism 23A Reduction gear mechanism casing 23Aa Rear part 24 Reduction gear group 25 Linear motion shaft 25a Small diameter shaft 26 Case body 27 Thrust bearing 28 Load transducer 28a Load value

Claims (4)

シリンダ(2A)内に回転自在に設けられたスクリュ(22)と、前記シリンダ(2A)の後端(2B)に設けられ前記スクリュ(22)を回転駆動するための減速ギア機構(23)と、前記減速ギア機構(23)に接続され前記減速ギア機構(23)を駆動するためのモータ(2b)と、前記減速ギア機構(23)の後部(23Aa)に設けられると共に前記スクリュ(22)に直接又は間接的に接して軸方向に直動する直動軸(25)と、前記減速ギア機構(23)の後部(23Aa)に設けられ前記直動軸(25)を直動自在に支持するためのスラストベアリング(27)と、前記スラストベアリング(27)の後部に配設され前記直動軸(25)の端部と接する荷重変換器(28)と、を用い、
前記スクリュ(22)に付加されるスラスト荷重(S)を前記直動軸(25)を介して前記荷重変換器(28)により測定することを特徴とする押出機先端圧力測定方法。 A screw (22) rotatably provided in the cylinder (2A), and a reduction gear mechanism (23) provided at the rear end (2B) of the cylinder (2A) for rotationally driving the screw (22); A motor (2b) connected to the reduction gear mechanism (23) for driving the reduction gear mechanism (23), and a rear portion (23Aa) of the reduction gear mechanism (23) and the screw (22) A linear motion shaft (25) that is directly or indirectly in contact with the linear motion shaft, and a rear portion (23Aa) of the reduction gear mechanism (23) that supports the linear motion shaft (25) so as to be linearly movable. A thrust bearing (27) for performing, and a load converter (28) disposed at a rear portion of the thrust bearing (27) and in contact with an end of the linear motion shaft (25),
A method for measuring the pressure at the end of an extruder, characterized in that a thrust load (S) applied to the screw (22) is measured by the load converter (28) via the linear motion shaft (25). 前記減速ギア機構(23)の減速器ギア機構ケーシング(23A)と一体に形成されて突出する筒状又はカップ状のケース体(26)内に、前記スラストベアリング(27)及び荷重変換器(28)が設けられていることを特徴とする請求項１記載の押出機先端圧力測定方法。   The thrust bearing (27) and the load converter (28) are formed in a cylindrical or cup-shaped case body (26) that is formed integrally with the speed reducer gear mechanism casing (23A) of the speed reduction gear mechanism (23) and protrudes. The method for measuring the pressure at the end of the extruder according to claim 1, wherein: シリンダ(2A)内に回転自在に設けられたスクリュ(22)と、前記シリンダ(2A)の後端(2B)に設けられ前記スクリュ(22)を回転駆動するための減速ギア機構(23)と、前記減速ギア機構(23)に接続され前記減速ギア機構(23)を駆動するためのモータ(2b)と、前記減速ギア機構(23)の後部(23Aa)に設けられると共に前記スクリュ(22)に直接又は間接的に接して軸方向に直動する直動軸(25)と、前記減速ギア機構(23)の後部(23Aa)に設けられ前記直動軸(25)を直動自在に支持するためのスラストベアリング(27)と、前記スラストベアリング(27)の後部に配設され前記直動軸(25)の端部と接する荷重変換器(28)と、よりなり、
前記スクリュ(22)に付加されるスラスト荷重(S)を前記直動軸(25)を介して前記荷重変換器(28)により測定することを特徴とする押出機先端圧力測定装置。 A screw (22) rotatably provided in the cylinder (2A), and a reduction gear mechanism (23) provided at the rear end (2B) of the cylinder (2A) for rotationally driving the screw (22); A motor (2b) connected to the reduction gear mechanism (23) for driving the reduction gear mechanism (23), and a rear portion (23Aa) of the reduction gear mechanism (23) and the screw (22) A linear motion shaft (25) that is directly or indirectly in contact with the linear motion shaft, and a rear portion (23Aa) of the reduction gear mechanism (23) that supports the linear motion shaft (25) so as to be linearly movable. A thrust bearing (27), and a load converter (28) disposed at a rear portion of the thrust bearing (27) and in contact with an end of the linear motion shaft (25),
An extruder tip pressure measuring device, wherein a thrust load (S) applied to the screw (22) is measured by the load converter (28) through the linear motion shaft (25). 前記減速ギア機構(23)の減速器ギア機構ケーシング(23A)と一体に形成されて突出する筒状又はカップ状のケース体(26)内に、前記スラストベアリング(27)及び荷重変換器(28)が設けられていることを特徴とする請求項３記載の押出機先端圧力測定装置。   The thrust bearing (27) and the load converter (28) are formed in a cylindrical or cup-shaped case body (26) that is formed integrally with the speed reducer gear mechanism casing (23A) of the speed reduction gear mechanism (23) and protrudes. 4) The extruder tip pressure measuring device according to claim 3, wherein
JP2010011838A 2010-01-22 2010-01-22 Method and device for measuring tip pressure of extruder Pending JP2011148205A (en)

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2020049691A1 (en) * 2018-09-06 2020-03-12 日本たばこ産業株式会社 Extruder control method and method for producing flavor source using same, and extruder and extrusion molding system using same

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH06143390A (en) * 1992-11-04 1994-05-24 Kobe Steel Ltd Extruder
JP2002113769A (en) * 2000-10-12 2002-04-16 Hitachi Zosen Corp Method for stopping extruder and safety device

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH06143390A (en) * 1992-11-04 1994-05-24 Kobe Steel Ltd Extruder
JP2002113769A (en) * 2000-10-12 2002-04-16 Hitachi Zosen Corp Method for stopping extruder and safety device

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2020049691A1 (en) * 2018-09-06 2020-03-12 日本たばこ産業株式会社 Extruder control method and method for producing flavor source using same, and extruder and extrusion molding system using same
CN112638617A (en) * 2018-09-06 2021-04-09 日本烟草产业株式会社 Method for controlling extruder, method for producing flavor source using same, extruder, and extrusion molding system using same
CN112638617B (en) * 2018-09-06 2023-03-21 日本烟草产业株式会社 Method for controlling extruder, method for producing flavor source using same, extruder, and extrusion molding system using same

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