JP6066183B2 - Screw shaft support structure - Google Patents

Screw shaft support structure Download PDF

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Publication number
JP6066183B2
JP6066183B2 JP2013010438A JP2013010438A JP6066183B2 JP 6066183 B2 JP6066183 B2 JP 6066183B2 JP 2013010438 A JP2013010438 A JP 2013010438A JP 2013010438 A JP2013010438 A JP 2013010438A JP 6066183 B2 JP6066183 B2 JP 6066183B2
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Prior art keywords
insertion portion
screw shaft
shaft
screw
shaft insertion
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JP2014141011A (en
Inventor
昭人 恋田
昭人 恋田
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Nihon Spindle Manufacturing Co Ltd
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Nihon Spindle Manufacturing Co Ltd
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Priority to JP2013010438A priority Critical patent/JP6066183B2/en
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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
    • B29C48/36—Means for plasticising or homogenising the moulding material or forcing it through the nozzle or die
    • B29C48/50—Details of extruders
    • B29C48/505—Screws
    • B29C48/535—Screws with thread pitch varying along the longitudinal axis
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29B—PREPARATION OR PRETREATMENT OF THE MATERIAL TO BE SHAPED; MAKING GRANULES OR PREFORMS; RECOVERY OF PLASTICS OR OTHER CONSTITUENTS OF WASTE MATERIAL CONTAINING PLASTICS
    • B29B7/00—Mixing; Kneading
    • B29B7/30—Mixing; Kneading continuous, with mechanical mixing or kneading devices
    • B29B7/34—Mixing; Kneading continuous, with mechanical mixing or kneading devices with movable mixing or kneading devices
    • B29B7/38—Mixing; Kneading continuous, with mechanical mixing or kneading devices with movable mixing or kneading devices rotary
    • B29B7/46—Mixing; Kneading continuous, with mechanical mixing or kneading devices with movable mixing or kneading devices rotary with more than one shaft
    • B29B7/48—Mixing; Kneading continuous, with mechanical mixing or kneading devices with movable mixing or kneading devices rotary with more than one shaft with intermeshing devices, e.g. screws
    • B29B7/484—Mixing; Kneading continuous, with mechanical mixing or kneading devices with movable mixing or kneading devices rotary with more than one shaft with intermeshing devices, e.g. screws with two shafts provided with screws, e.g. one screw being shorter than the other
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29B—PREPARATION OR PRETREATMENT OF THE MATERIAL TO BE SHAPED; MAKING GRANULES OR PREFORMS; RECOVERY OF PLASTICS OR OTHER CONSTITUENTS OF WASTE MATERIAL CONTAINING PLASTICS
    • B29B7/00—Mixing; Kneading
    • B29B7/30—Mixing; Kneading continuous, with mechanical mixing or kneading devices
    • B29B7/34—Mixing; Kneading continuous, with mechanical mixing or kneading devices with movable mixing or kneading devices
    • B29B7/38—Mixing; Kneading continuous, with mechanical mixing or kneading devices with movable mixing or kneading devices rotary
    • B29B7/46—Mixing; Kneading continuous, with mechanical mixing or kneading devices with movable mixing or kneading devices rotary with more than one shaft
    • B29B7/48—Mixing; Kneading continuous, with mechanical mixing or kneading devices with movable mixing or kneading devices rotary with more than one shaft with intermeshing devices, e.g. screws
    • B29B7/488—Parts, e.g. casings, sealings; Accessories, e.g. flow controlling or throttling devices
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29B—PREPARATION OR PRETREATMENT OF THE MATERIAL TO BE SHAPED; MAKING GRANULES OR PREFORMS; RECOVERY OF PLASTICS OR OTHER CONSTITUENTS OF WASTE MATERIAL CONTAINING PLASTICS
    • B29B7/00—Mixing; Kneading
    • B29B7/30—Mixing; Kneading continuous, with mechanical mixing or kneading devices
    • B29B7/34—Mixing; Kneading continuous, with mechanical mixing or kneading devices with movable mixing or kneading devices
    • B29B7/38—Mixing; Kneading continuous, with mechanical mixing or kneading devices with movable mixing or kneading devices rotary
    • B29B7/46—Mixing; Kneading continuous, with mechanical mixing or kneading devices with movable mixing or kneading devices rotary with more than one shaft
    • B29B7/48—Mixing; Kneading continuous, with mechanical mixing or kneading devices with movable mixing or kneading devices rotary with more than one shaft with intermeshing devices, e.g. screws
    • B29B7/488—Parts, e.g. casings, sealings; Accessories, e.g. flow controlling or throttling devices
    • B29B7/489—Screws
    • 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
    • B29C48/50—Details of extruders
    • B29C48/505—Screws
    • B29C48/52—Screws with an outer diameter varying along the longitudinal axis, e.g. for obtaining different thread clearance
    • B29C48/525—Conical screws
    • 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
    • B29C48/252—Drive or actuation means; Transmission means; Screw supporting means
    • B29C48/2522—Shaft or screw supports, e.g. bearings

Landscapes

  • 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)

Description

本発明は、スクリュー軸の支持部構造に関し、特に、２軸押出機等に適用されるスクリュー軸の支持部構造に関するものである。   The present invention relates to a support structure for a screw shaft, and more particularly to a support structure for a screw shaft applied to a twin-screw extruder or the like.

従来、未成形のゴム原料やプラスチック原料等の高粘度物質（以下、「原材料」という。）をスクリュー羽根にて押し出しながら次工程に適した形状に予備成形するために２軸押出機が用いられている。
この２軸押出機は、例えば、図３に示すように、対向して配設した２本のスクリュー羽根２を備えたスクリュー軸１のうち、一方のスクリュー軸１の基端側に駆動装置としての減速機付きのモータＭを取り付け、スクリュー軸１の各々にコニカルギヤ１１を設けることにより、モータＭにて一方のスクリュー軸１を回転駆動させることによって、一対のコニカルギヤ１１の噛み合い係合により他方のスクリュー軸１を連動して回転するようにしている。 Conventionally, a twin-screw extruder has been used to preform a high-viscosity material (hereinafter referred to as “raw material”) such as unmolded rubber material or plastic material into a shape suitable for the next process while extruding with a screw blade. ing.
For example, as shown in FIG. 3, this twin-screw extruder has a screw shaft 1 provided with two screw blades 2 arranged to face each other as a drive device on the base end side of one screw shaft 1. A motor M with a reduction gear is attached, and a conical gear 11 is provided on each of the screw shafts 1 so that one screw shaft 1 is rotationally driven by the motor M. The screw shaft 1 is rotated in conjunction with it.

ところで、上記２軸押出機において、コニカルギヤ１１は、コニカルギヤ１１同士が常時噛み合って摺接するために潤滑油を油浴するギヤボックス４が必要である。
そして、ギヤボックス４からケーシング３へ潤滑油が浸入するのを防止するために適宜のシール機構（図示省略）が設けられるが、シール機構に何らかの不具合があった場合には、ギヤボックス４内の潤滑油が、ギヤボックス４とケーシング３とを区画する隔壁４ａに設けられたスクリュー軸１の軸挿通部６を通ってケーシング３内に浸入し、原材料に混入するという問題があった。
一方、ケーシング３内の原材料は、スクリュー羽根２に噛み込まれてケーシング出口３ａから押し出されるが、このとき、ケーシング３内の原材料の内圧が高まることによって、スクリュー軸１の軸挿通部６、さらには、軸受５に侵入し、シール機構を破損させる等の問題があった。 By the way, in the above-described twin-screw extruder, the conical gear 11 needs a gear box 4 for bathing lubricating oil so that the conical gears 11 are always meshed with each other and are in sliding contact with each other.
An appropriate sealing mechanism (not shown) is provided to prevent the lubricating oil from entering the casing 3 from the gear box 4, but if there is any malfunction in the sealing mechanism, There was a problem that the lubricating oil entered the casing 3 through the shaft insertion portion 6 of the screw shaft 1 provided in the partition wall 4a that partitions the gear box 4 and the casing 3, and mixed into the raw material.
On the other hand, the raw material in the casing 3 is bitten by the screw blades 2 and pushed out from the casing outlet 3a. At this time, the internal pressure of the raw material in the casing 3 increases, so that the shaft insertion portion 6 of the screw shaft 1 and further Has problems such as entering the bearing 5 and damaging the seal mechanism.

本発明は、上記従来の２軸押出機の有する問題点に鑑み、ギヤボックス内の潤滑油が軸挿通部を通ってケーシング内に浸入したり、ケーシング内の原材料が軸挿通部、さらには、軸受に侵入することを防止することができるスクリュー軸の支持部構造を提供することを目的とする。   In view of the problems of the conventional twin-screw extruder, the present invention allows the lubricating oil in the gear box to enter the casing through the shaft insertion portion, the raw material in the casing is the shaft insertion portion, It aims at providing the support part structure of the screw shaft which can prevent entering a bearing.

上記目的を達成するため、本発明のスクリュー軸の支持部構造は、ギヤボックス内と原材料が導入されるケーシング内とを区画する隔壁に設けられた軸挿通部を貫通するスクリュー軸の支持部構造において、前記隔壁に、軸挿通部と機外とを連通する排出孔を、軸挿通部の下部の内周面に周方向を長手方向としたスリット状にスクリュー軸に面して開口するように形成したことを特徴とする。 To achieve the above object, the support structure of the screw shaft of the present invention, the support part structure of the screw shaft passing through the shaft insertion portion provided in the partition wall for partitioning the inside casing gearbox and raw materials are introduced In the above structure, a discharge hole that communicates the shaft insertion portion with the outside of the machine is opened in the slit in the slit shape with the circumferential direction as the longitudinal direction on the inner peripheral surface of the lower portion of the shaft insertion portion. It is formed.

本発明のスクリュー軸の支持部構造によれば、ギヤボックス内と原材料が導入されるケーシング内とを区画する隔壁に、軸挿通部と機外とを連通する排出孔を形成するようにすることにより、ギヤボックス内から軸挿通部を通ってケーシング内に浸入しようとする潤滑油や、ケーシング内から軸挿通部、さらには、軸受に侵入しようとする原材料を、排出孔から機外に排出することができ、潤滑油が軸挿通部を通ってケーシング内に浸入したり、ケーシング内の原材料が軸挿通部、さらには、軸受に侵入することを防止することができる。
また、軸受に侵入しようとする原材料が排出孔から機外に排出されるため、軸挿通部に配設したシール機構を構成するシール部材は、軸挿通部に侵入した原材料の圧力を受けることがなく、シール部材によるシール状態を安定して維持することができる。 According to the support part structure of the screw shaft of the present invention, the partition wall for partitioning the inside casing gearbox and raw materials are introduced, it is adapted to form a discharge hole communicating with the shaft insertion portion and outside By this, the lubricating oil that is about to enter the casing through the shaft insertion part from the inside of the gear box, and the raw material that is about to enter the shaft insertion part and further to the bearing from the casing are discharged out of the machine from the discharge hole. It is possible to prevent the lubricating oil from entering the casing through the shaft insertion portion, and to prevent the raw material in the casing from entering the shaft insertion portion and further the bearing.
In addition, since the raw material entering the bearing is discharged from the discharge hole to the outside of the machine, the seal member constituting the seal mechanism disposed in the shaft insertion portion can receive the pressure of the raw material that has entered the shaft insertion portion. In addition, the sealing state by the sealing member can be stably maintained.

そして、前記排出孔を、軸挿通部の下部の周方向に開口するようにすることにより、潤滑油や原材料の排出を確実、かつ円滑に行うことができる。 And by making the said discharge hole open in the circumferential direction of the lower part of a shaft insertion part, discharge | emission of lubricating oil or a raw material can be performed reliably and smoothly.

本発明のスクリュー軸の支持部構造を適用した２軸押出機の一実施例を示す平面図である。It is a top view which shows one Example of the twin-screw extruder to which the support part structure of the screw shaft of this invention is applied. 図１のＡ−Ａ断面図である。It is AA sectional drawing of FIG. 従来の２軸押出機の説明図である。It is explanatory drawing of the conventional twin-screw extruder.

以下、本発明のスクリュー軸の支持部構造の実施の形態を、同スクリュー軸の支持部構造を適用した２軸押出機を例に説明する。   Hereinafter, an embodiment of the support structure of the screw shaft of the present invention will be described by taking a twin-screw extruder to which the support structure of the screw shaft is applied as an example.

図１〜図２に、２軸押出機の一実施例を示す。   1 to 2 show an embodiment of a twin screw extruder.

この２軸押出機は、原材料をスクリュー羽根にて押し出しながら次工程に適した形状に予備成形するためのもので、その基本構造は、図３に示した従来の２軸押出機と同様である。   This twin-screw extruder is for preforming raw materials into shapes suitable for the next process while extruding them with screw blades, and its basic structure is the same as the conventional twin-screw extruder shown in FIG. .

そして、２軸押出機は、ギヤボックス４と原材料が導入されるケーシング３とを区画する隔壁４ａに設けられた軸挿通部６を貫通するスクリュー軸１の支持部構造として、隔壁４ａに、軸挿通部６と機外とを連通する排出孔７を形成するようにしている。   The twin-screw extruder includes a shaft 4 as a support structure of the screw shaft 1 passing through the shaft insertion portion 6 provided in the partition 4 a that partitions the gear box 4 and the casing 3 into which the raw material is introduced. A discharge hole 7 for communicating the insertion portion 6 with the outside of the machine is formed.

これにより、この２軸押出機は、ギヤボックス４内から軸挿通部６を通ってケーシング３内に浸入しようとする潤滑油や、ケーシング３内から軸挿通部６、さらには、軸受５に侵入しようとする原材料を、排出孔７から機外に排出することができ、潤滑油が軸挿通部６を通ってケーシング３内に浸入したり、ケーシング３内の原材料が軸挿通部６、さらには、軸受５に侵入することを防止することができる。
ここで、ケーシング３内からスクリュー軸１と軸挿通部６との隙間に侵入した原材料は、この隙間でスクリュー軸１の外周面と軸挿通部６の内周面とに摺接し、揉まれて紙縒になって排出孔７から機外に排出される。 As a result, this twin-screw extruder enters the casing 3 from the gear box 4 through the shaft insertion portion 6, and enters the shaft insertion portion 6 and also the bearing 5 from the casing 3. The raw material to be tried can be discharged out of the machine through the discharge hole 7, and the lubricating oil can enter the casing 3 through the shaft insertion portion 6, or the raw material in the casing 3 can be removed from the shaft insertion portion 6. Intrusion into the bearing 5 can be prevented.
Here, the raw material that has entered the gap between the screw shaft 1 and the shaft insertion portion 6 from the inside of the casing 3 is in sliding contact with the outer peripheral surface of the screw shaft 1 and the inner peripheral surface of the shaft insertion portion 6 through this gap. A paper bottle is discharged from the discharge hole 7 to the outside of the machine.

この場合、排出孔７は、軸挿通部６の下部の周方向にスリット状に開口するようにすることが好ましい。
これにより、潤滑油や原材料の排出を確実、かつ円滑に行うことができる。 In this case, the discharge hole 7 is preferably opened in a slit shape in the circumferential direction below the shaft insertion portion 6.
Thereby, discharge of lubricating oil and raw materials can be performed reliably and smoothly.

そして、この２軸押出機によれば、軸受５に侵入しようとする原材料が排出孔７から機外に排出されるため、軸挿通部６に配設したシール機構を構成するシール部材８は、軸挿通部６に侵入した原材料の圧力を受けることがなく、シール部材８によるシール状態を安定して維持することができる。   And according to this biaxial extruder, since the raw material which is going to penetrate into the bearing 5 is discharged out of the machine from the discharge hole 7, the seal member 8 constituting the seal mechanism disposed in the shaft insertion portion 6 is The pressure of the raw material that has entered the shaft insertion portion 6 is not received, and the sealed state by the seal member 8 can be stably maintained.

以上、本発明のスクリュー軸の支持部構造について、同スクリュー軸の支持部構造を適用した２軸押出機を例に説明したが、本発明は上記実施例に記載した構成に限定されるものではなく、スクリュー軸を使用する各種機械装置におけるスクリュー軸の支持部構造として適用する等、その趣旨を逸脱しない範囲において適宜その構成を変更することができるものである。   The screw shaft support portion structure of the present invention has been described above by taking the twin-screw extruder to which the screw shaft support portion structure is applied as an example. However, the present invention is not limited to the configuration described in the above embodiment. The configuration can be changed as appropriate without departing from the spirit of the invention, for example, as a structure for supporting the screw shaft in various mechanical devices using the screw shaft.

本発明のスクリュー軸の支持部構造は、ギヤボックス内の潤滑油が軸挿通部を通ってケーシング内に浸入したり、ケーシング内の原材料が軸挿通部、さらには、軸受に侵入することを防止することができることから、２軸押出機を始めとするスクリュー軸を使用する各種機械装置におけるスクリュー軸の支持部構造の用途に好適に用いることができる。   The screw shaft support portion structure of the present invention prevents the lubricating oil in the gear box from entering the casing through the shaft insertion portion, and prevents raw materials in the casing from entering the shaft insertion portion and further the bearing. Therefore, it can be suitably used for the application of the screw shaft support portion structure in various mechanical devices using a screw shaft such as a twin-screw extruder.

１ スクリュー軸
１１ コニカルギヤ
２ スクリュー羽根
３ ケーシング
４ ギヤボックス
４ａ 隔壁
５ 軸受
６ 軸挿通部
７ 排出孔
８ シール部材
Ｍ モータ DESCRIPTION OF SYMBOLS 1 Screw shaft 11 Conical gear 2 Screw blade 3 Casing 4 Gear box 4a Partition 5 Bearing 6 Shaft insertion part 7 Discharge hole 8 Seal member M Motor

Claims (1)

ギヤボックス内と原材料が導入されるケーシング内とを区画する隔壁に設けられた軸挿通部を貫通するスクリュー軸の支持部構造において、前記隔壁に、軸挿通部と機外とを連通する排出孔を、軸挿通部の下部の内周面に周方向を長手方向としたスリット状にスクリュー軸に面して開口するように形成したことを特徴とするスクリュー軸の支持部構造。 In support part structure of the screw shaft passing through the shaft insertion portion provided in the partition wall for partitioning the inside casing gearbox and raw materials are introduced, the partition wall, the discharge hole communicating with the shaft insertion portion and outside The screw shaft support portion structure is formed so as to open on the inner peripheral surface of the lower portion of the shaft insertion portion in a slit shape with the circumferential direction as the longitudinal direction so as to face the screw shaft.
JP2013010438A 2013-01-23 2013-01-23 Screw shaft support structure Active JP6066183B2 (en)

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JP6066183B2 true JP6066183B2 (en) 2017-01-25

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Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5251176Y2 (en) * 1973-10-15 1977-11-19
JPS5513072U (en) * 1978-07-14 1980-01-28
JP5027717B2 (en) * 2008-04-08 2012-09-19 株式会社モリヤマ Twin screw extruder

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