JP2723331B2 - Plastic molding machine - Google Patents
Plastic molding machineInfo
- Publication number
- JP2723331B2 JP2723331B2 JP2090969A JP9096990A JP2723331B2 JP 2723331 B2 JP2723331 B2 JP 2723331B2 JP 2090969 A JP2090969 A JP 2090969A JP 9096990 A JP9096990 A JP 9096990A JP 2723331 B2 JP2723331 B2 JP 2723331B2
- Authority
- JP
- Japan
- Prior art keywords
- medium
- drive shaft
- screw
- molding machine
- temperature
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Fee Related
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
- B29C48/36—Means for plasticising or homogenising the moulding material or forcing it through the nozzle or die
- B29C48/50—Details of extruders
- B29C48/505—Screws
- B29C48/51—Screws with internal flow passages, e.g. for molten material
- B29C48/515—Screws with internal flow passages, e.g. for molten material for auxiliary fluids, e.g. foaming agents
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Processing And Handling Of Plastics And Other Materials For Molding In General (AREA)
- Injection Moulding Of Plastics Or The Like (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、プラスチック材料及び添加剤等の複合材料
を溶融混練し、押出成形・射出成形等を行なうプラスチ
ック成形機に関するものである。Description: TECHNICAL FIELD The present invention relates to a plastic molding machine that melt-kneads a plastic material and a composite material such as an additive and performs extrusion molding, injection molding, and the like.
（従来の技術） 従来、押出成形機、射出成形機、混練機等のプラスチ
ック成形機として、シリンダバレル内にスクリューが回
転自在に嵌装され、該スクリューに駆動軸が直結される
と共に、スクリュー及び駆動軸（油圧モータの出力軸）
の中心部に温度制御媒体給排路が連通状に配設され、押
出される溶融樹脂温度を制御できるようにしたものがあ
る。そして、前記温度制御媒体として、60℃以下の水等
の低温媒体が用いられ、主にスクリューの冷却を目的と
した温度制御が行なわれている。しかし、アクリルニト
リル樹脂等の高粘度の材料の場合は、低温媒体を使用す
ると、冷却による浅溝効果が生じ、溶融樹脂押出量の低
下、スクリュー駆動トルクの増大が起る。そこで、高温
媒体を用いて温度制御することが行なわれている。(Prior Art) Conventionally, as a plastic molding machine such as an extrusion molding machine, an injection molding machine, and a kneading machine, a screw is rotatably fitted in a cylinder barrel, and a drive shaft is directly connected to the screw. Drive shaft (output shaft of hydraulic motor)
In some cases, a temperature control medium supply / discharge passage is provided at the center portion of the container so as to communicate with it, so that the temperature of the molten resin to be extruded can be controlled. As the temperature control medium, a low-temperature medium such as water at 60 ° C. or lower is used, and temperature control is mainly performed for cooling the screw. However, in the case of a high-viscosity material such as an acrylonitrile resin, when a low-temperature medium is used, a shallow groove effect occurs due to cooling, and the molten resin extrusion amount decreases and the screw driving torque increases. Therefore, temperature control is performed using a high-temperature medium.
（発明が解決しようとする課題） ところで、従来技術において、温度制御媒体として高
温媒体を使用する場合、駆動軸とその軸受のクリアラン
スが大きくして駆動軸の熱膨張を吸収する必要がある
が、高温時においては問題がないとしても、低温時に或
いは媒体を供給しない時には、前記クリアランスが大き
過ぎてガタが生じ軸受の寿命を低下させるという問題が
ある。また、駆動軸と油圧モータを分離して油圧モータ
への熱影響を避けることが行なわれているが、非常に高
価になるなどん問題があった。(Problems to be Solved by the Invention) In the prior art, when a high-temperature medium is used as a temperature control medium, it is necessary to increase the clearance between the drive shaft and its bearing to absorb the thermal expansion of the drive shaft. Even if there is no problem at a high temperature, there is a problem that at a low temperature or when the medium is not supplied, the clearance is too large to cause backlash and shorten the life of the bearing. Although the drive shaft and the hydraulic motor are separated to avoid heat influence on the hydraulic motor, there is a problem that it becomes very expensive.
本発明は、上述のような実状に鑑みてなされたもの
で、その目的とするところは、高温媒体を使用する場合
においても、駆動軸等の軸受部及びその駆動部（例えば
油圧モータ）への熱影響を避けることができるプラスチ
ック成形機を提供するにある。SUMMARY OF THE INVENTION The present invention has been made in view of the above situation, and has as its object the purpose of providing a bearing for a drive shaft or the like and a drive unit (for example, a hydraulic motor) even when a high-temperature medium is used. An object of the present invention is to provide a plastic molding machine capable of avoiding heat effects.
（課題を解決するため手段） 本発明では、上記目的を達成するために、次の技術的
手段を講じた。(Means for Solving the Problems) In the present invention, the following technical means have been taken in order to achieve the above object.
すなわち、本発明は、シリンダバレル１内にスクリュ
ー７が回転自在に嵌装され、スクリュー７に駆動軸８が
直結されると共に、スクリュー７及び駆動軸８に温度制
御媒体給排路12,13,22が連通状に配設されているプラス
チック成形機において、前記駆動軸８の温度制御媒体給
排路12,22の外周に、冷却層24が設けられていることを
特徴としている。That is, according to the present invention, the screw 7 is rotatably fitted in the cylinder barrel 1, the drive shaft 8 is directly connected to the screw 7, and the temperature control medium supply / discharge paths 12, 13, In a plastic molding machine in which 22 are arranged in communication, a cooling layer 24 is provided on the outer periphery of the temperature control medium supply / discharge passages 12 and 22 of the drive shaft 8.
なお、駆動多軸８の温度制御媒体給排路12,22と冷却
層24の間に断熱間23を設けるのが好ましい。It is preferable to provide an adiabatic space 23 between the temperature control medium supply / discharge passages 12 and 22 of the driving multi-shaft 8 and the cooling layer 24.
（作 用） 本発明によれば、スクリュー７及び駆動軸８の温度制
御媒体給排路12,13,22に、高温媒体（例えば200〜250℃
の溶融樹脂送出温度と同程度の流体）を供給し流通させ
ると共に、駆動軸８の外周の冷却層24に冷却媒体を流通
させることにより、浅溝効果を生起することなく所要量
の溶融樹脂を確実に送出でき、スクリュー駆動トルクが
増大することなく円滑に運転される。そして、駆動軸８
から軸受部及び駆動部への伝導熱の一部は、冷却層24を
流通する冷却媒体により外部へ搬出され、軸受部及び駆
動部を異常に昇温させることがなく、適正な温度に保持
される。(Operation) According to the present invention, the high-temperature medium (for example, 200 to 250 ° C.) is supplied to the temperature control medium supply / discharge paths 12, 13, and 22 of the screw 7 and the drive shaft 8.
The same amount of fluid as the molten resin delivery temperature is supplied and circulated, and a cooling medium is circulated through the cooling layer 24 on the outer periphery of the drive shaft 8 so that a required amount of molten resin can be produced without causing a shallow groove effect. It can be reliably delivered and can be operated smoothly without increasing the screw driving torque. And the drive shaft 8
Some of the heat transferred from the heat transfer member to the bearing portion and the drive portion is carried out to the outside by the cooling medium flowing through the cooling layer 24, and is maintained at an appropriate temperature without abnormally increasing the temperature of the bearing portion and the drive portion. You.
（実施例） 以下、本発明の実施例を図面に基づき説明する。(Example) Hereinafter, an example of the present invention will be described with reference to the drawings.
図面において、１はシリンダバレルで、一端部に材料
供給口２を有すると共に、他端に押出口３を有し、外周
に熱盤４を備えており、材料供給口２側が支持台５を介
して台盤６上に載設されている。７はスクリューで、前
記シリンダバレル１内に回転自在に嵌装され、先端7aが
コーン状とされ、後端が前記シリンダバレル１から延出
されて、駆動軸８端に嵌入されキー９により連結されて
いる。そして、該スクリュー７の中心部には、後端から
先端近傍にまで延びる媒体流通孔10が設けられ、温度制
御媒体流通管11が所定の間隔を保持して嵌装されてお
り、該流通管11内が媒体供給路12とされ、該流通管11と
前記孔10の間が媒体排出路13とされている。また、スク
リュー７の後端部には、冷却媒体排出孔14が設けられて
いる。In the drawings, reference numeral 1 denotes a cylinder barrel having a material supply port 2 at one end, an extrusion port 3 at the other end, and a hot platen 4 on the outer periphery. It is mounted on the base plate 6. Reference numeral 7 denotes a screw, which is rotatably fitted into the cylinder barrel 1, has a conical tip 7 a, a rear end extending from the cylinder barrel 1, fitted into the end of a drive shaft 8, and connected by a key 9. Have been. At the center of the screw 7, a medium flow hole 10 extending from the rear end to the vicinity of the front end is provided, and a temperature control medium flow tube 11 is fitted with a predetermined interval therebetween. Inside 11 is a medium supply path 12, and between the flow pipe 11 and the hole 10 is a medium discharge path 13. Further, a cooling medium discharge hole 14 is provided at the rear end of the screw 7.
前記駆動軸８は中空孔で、油圧モータ15の出力軸15a
と一体化されて、台盤６上に設けた軸受台16に、軸受1
7,18、推力軸受19を介して回転自在に軸支さている。な
お、前記油圧モータ15は、軸受台16の後端に取付けら
れ、該油圧モータ15により駆動軸８を回転駆動するよう
になっている。そして、駆動軸８及び出力軸15aは、前
述のように一体物からなる中空軸で、中空部内には前記
媒体流通管11が出力軸15a端から外方に突出するように
挿通され、前記媒体流通管11の外周には、外側媒体流通
管20が同心的にかつ前記媒体流通管11及び中空部内周壁
面との間にそれぞれ間隔を保持して嵌装されている。な
お、外側媒体流通管20は、前端がスクリュー７の媒体流
通孔10後端に螺着され、後端部がリング状カバー21を介
して出力軸15a端中空部に気密状に保持されており、外
側媒体流通管20内に媒体排出路13と連通する媒体排出路
22とされている。また、前記外側媒体流通管20の外周面
には、略全長にわたってグラスウール等からなる断熱層
23が外嵌被着され、該断熱層33の外周が冷却層24を形成
する冷却媒体流通路とされ、前記スクリュー７の冷却媒
体排出孔14が連通している。そして、前記出力軸15aの
外端周面には、冷却層24への冷却媒体供給孔25が設けら
れ、冷却媒体供給周溝26及び供給口27を備えたリング状
のシールキャップ28が相対回転可能に被嵌され、該シー
ルキャップ28は油圧モータ15に固着されている。The drive shaft 8 is a hollow hole, and the output shaft 15a of the hydraulic motor 15
The bearing 1 is integrated with the bearing base 16 provided on the base 6.
7, 18 and are rotatably supported via thrust bearings 19. The hydraulic motor 15 is attached to the rear end of the bearing base 16 and drives the drive shaft 8 to rotate by the hydraulic motor 15. The drive shaft 8 and the output shaft 15a are hollow shafts made of an integral body as described above, and the medium flow pipe 11 is inserted into the hollow portion so as to protrude outward from the end of the output shaft 15a. On the outer circumference of the flow pipe 11, an outer medium flow pipe 20 is fitted concentrically and with a space between the medium flow pipe 11 and the inner peripheral wall surface of the hollow portion. The outer medium flow pipe 20 has a front end screwed to a rear end of the medium flow hole 10 of the screw 7, and a rear end of the outer medium flow pipe 20 is hermetically held in a hollow portion of the output shaft 15 a end via a ring-shaped cover 21. , A medium discharge path communicating with the medium discharge path 13 in the outer medium flow pipe 20
It is 22. Further, a heat insulating layer made of glass wool or the like is provided on the outer peripheral surface of the outer medium flow pipe 20 over substantially the entire length.
The outer periphery of the heat insulating layer 33 serves as a cooling medium flow passage forming the cooling layer 24, and the cooling medium discharge hole 14 of the screw 7 communicates therewith. A cooling medium supply hole 25 to the cooling layer 24 is provided on the outer peripheral surface of the output shaft 15a, and a ring-shaped seal cap 28 having a cooling medium supply peripheral groove 26 and a supply port 27 is relatively rotated. The seal cap 28 is fixed to the hydraulic motor 15 as possible.
前記媒体流通管11、20の後端には、媒体供給口29の媒
体排出口30を備えたロータリジョイント31が接続され、
両流通管11、20が出力軸15aと共に回転可能となってい
る。At the rear end of the medium flow pipes 11, 20, a rotary joint 31 having a medium discharge port 30 of a medium supply port 29 is connected,
Both flow pipes 11, 20 are rotatable together with the output shaft 15a.
上記実施例においては、アクリルニトリル樹脂の溶融
送出の場合、温度制御媒体として、200〜250℃に昇温さ
れた加熱油が使用され、冷却媒体としては空気が使用さ
れる。そして、スクリュー７の先端部の温度を、溶融樹
脂の送出温度と同程度に制御し、溶融樹脂送出温度が一
定に保持されるように温度調節される。また、前記冷却
層24においては、駆動軸８及び出力軸15aの外周部の温
度が約60℃以下になるように制御される。In the above embodiment, in the case of melting and sending out the acrylonitrile resin, a heating oil heated to 200 to 250 ° C. is used as a temperature control medium, and air is used as a cooling medium. Then, the temperature of the distal end portion of the screw 7 is controlled to be substantially the same as the molten resin delivery temperature, and the temperature is adjusted so that the molten resin delivery temperature is kept constant. Further, in the cooling layer 24, the temperature of the outer peripheral portions of the drive shaft 8 and the output shaft 15a is controlled to be about 60 ° C. or less.
なお、前記スクリュー７の冷却媒体排出孔14の出口部
には、リング状の交流カバー32が固着されている。A ring-shaped AC cover 32 is fixed to the outlet of the cooling medium discharge hole 14 of the screw 7.
上記実施例では、温度制御媒体流通管11内を媒体供給
路12とし、該管11外側を媒体は排出路13としたが、これ
を逆にして該管11内を媒体排出路とし該管11外側を媒体
供給路とすることができる。In the above-described embodiment, the inside of the temperature control medium distribution pipe 11 is used as the medium supply path 12, and the outside of the pipe 11 is used as the medium discharge path 13. The outside can be a medium supply path.
また、温度制御媒体としては、高温媒体に限らず、中
音、低温媒体をも使用することができ、プラスチック材
料の性質に応じて、適宜選択使用することができる。The temperature control medium is not limited to a high temperature medium, but may be a medium or low temperature medium, and may be appropriately selected and used according to the properties of the plastic material.
本発明は、上記実施例に限定されるものではなく、例
えば、駆動軸８と油圧モータ15等の駆動部が分離された
ものにも採用しうること当然である。The present invention is not limited to the above-described embodiment, and it is obvious that the present invention can also be applied to, for example, one in which the drive units such as the drive shaft 8 and the hydraulic motor 15 are separated.
（発明の効果） 本発明は、上述のように、シリンダバレル１内にスク
リュー７が回転自在に嵌装され、スクリュー７に駆動軸
８が直結されると共に、スクリュー７及び駆動軸８に温
度制御媒体給排路21,13,22が連通状に配設されているプ
ラスチック成形機において、前記駆動軸８の温度制御媒
体給排路12,22の外周に、冷却層24が設けられているこ
とを特徴とするものであるから、プラスチック材料の諸
性質に対応して、スクリュー７の温度すなわち送出溶融
樹脂温度を、冷却媒体或いは加熱媒体等を用いて広範囲
にかつ適正に制御でき、浅溝効果、送出量低下、スクリ
ュー駆動トルク増大等を防止することができ、駆動軸８
の軸受部及び駆動部（例えば直結油圧モータ15）の寿命
の増大、シール材等の劣化防止を図り、円滑な運転を行
なうことが可能である。(Effect of the Invention) As described above, according to the present invention, the screw 7 is rotatably fitted in the cylinder barrel 1, the drive shaft 8 is directly connected to the screw 7, and the screw 7 and the drive shaft 8 are temperature-controlled. In a plastic molding machine in which the medium supply / discharge paths 21, 13, 22 are communicated, a cooling layer 24 is provided on the outer periphery of the temperature control medium supply / discharge paths 12, 22 of the drive shaft 8. Therefore, the temperature of the screw 7, that is, the temperature of the molten resin to be sent out can be controlled over a wide range and appropriately using a cooling medium or a heating medium in accordance with various properties of the plastic material. , A decrease in the delivery amount, an increase in the screw drive torque, and the like can be prevented.
It is possible to increase the life of the bearing unit and the drive unit (for example, the direct-coupled hydraulic motor 15), prevent deterioration of the seal material and the like, and perform a smooth operation.
図面は本発明の実施例を示すもので、第１図は要部の拡
大断面図、第２図は成形機全体の中央縦断面図である。 １……シリンダバレル、７……スクリュー、８……駆動
軸、12……温度制御媒体供給路、13,22……温度制御媒
体排出路、23……断熱層、24……冷却層。The drawings show an embodiment of the present invention. FIG. 1 is an enlarged sectional view of a main part, and FIG. 2 is a central longitudinal sectional view of the entire molding machine. 1 ... Cylinder barrel, 7 ... Screw, 8 ... Drive shaft, 12 ... Temperature control medium supply path, 13,22 ... Temperature control medium discharge path, 23 ... Heat insulation layer, 24 ... Cooling layer.
Claims (2)
（７）が回転自在に嵌装され、スリュー（７）に駆動軸
（８）が直結されると共に、スクリュー（７）及び駆動
軸（８）に温度制御媒体給排路（12）（13）（22）が連
通状に配設されているプラスチック成形機において、 前記駆動軸（８）の温度制御媒体給排路（12）（22）の
外周に、冷却層（24）が設けられていることを特徴とす
るプラスチック成形機。A screw (7) is rotatably fitted in a cylinder barrel (1), a drive shaft (8) is directly connected to a screw (7), and a screw (7) and a drive shaft (8) are provided. In a plastic molding machine in which the temperature control medium supply / discharge passages (12), (13), (22) are disposed in communication with each other, the temperature control medium supply / discharge passage (12), (22) of the drive shaft (8) is provided. A plastic molding machine characterized in that a cooling layer (24) is provided on the outer periphery.
（12）（22）と、前記冷却層（24）の間に断熱層（23）
が設けられている請求項１記載のプラスチック成形機。2. A heat insulating layer (23) between a temperature control medium supply / discharge passage (12) (22) of the drive shaft (8) and the cooling layer (24).
The plastic molding machine according to claim 1, further comprising:
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2090969A JP2723331B2 (en) | 1990-04-05 | 1990-04-05 | Plastic molding machine |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2090969A JP2723331B2 (en) | 1990-04-05 | 1990-04-05 | Plastic molding machine |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH03288612A JPH03288612A (en) | 1991-12-18 |
| JP2723331B2 true JP2723331B2 (en) | 1998-03-09 |
Family
ID=14013330
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP2090969A Expired - Fee Related JP2723331B2 (en) | 1990-04-05 | 1990-04-05 | Plastic molding machine |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2723331B2 (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR20160141947A (en) * | 2015-06-02 | 2016-12-12 | 주식회사 씨맥 | Temperature regulating system of extruder screw |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP4785062B2 (en) * | 2007-03-20 | 2011-10-05 | 日精樹脂工業株式会社 | Injection device with screw heating circuit |
| DE102019208475A1 (en) | 2019-06-11 | 2020-12-17 | Henkel Ag & Co. Kgaa | Device for producing and processing a multicomponent mixture and method for operating such a device |
| DE102019208473A1 (en) | 2019-06-11 | 2020-12-17 | Henkel Ag & Co. Kgaa | Device for producing a multicomponent mixture and method for operating such a device |
-
1990
- 1990-04-05 JP JP2090969A patent/JP2723331B2/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR20160141947A (en) * | 2015-06-02 | 2016-12-12 | 주식회사 씨맥 | Temperature regulating system of extruder screw |
| KR101713214B1 (en) * | 2015-06-02 | 2017-03-07 | 주식회사 씨맥 | Temperature regulating system of extruder screw |
Also Published As
| Publication number | Publication date |
|---|---|
| JPH03288612A (en) | 1991-12-18 |
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