JPS5838289B2 - 2-screw preheater - Google Patents

2-screw preheater

Info

Publication number
JPS5838289B2
JPS5838289B2 JP55167060A JP16706080A JPS5838289B2 JP S5838289 B2 JPS5838289 B2 JP S5838289B2 JP 55167060 A JP55167060 A JP 55167060A JP 16706080 A JP16706080 A JP 16706080A JP S5838289 B2 JPS5838289 B2 JP S5838289B2
Authority
JP
Japan
Prior art keywords
screw
raw material
receiving area
resin raw
preheating
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
Application number
JP55167060A
Other languages
Japanese (ja)
Other versions
JPS5789939A (en
Inventor
邦昭 遠藤
信行 早房
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Shibaura Machine Co Ltd
Original Assignee
Toshiba Machine Co Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Toshiba Machine Co Ltd filed Critical Toshiba Machine Co Ltd
Priority to JP55167060A priority Critical patent/JPS5838289B2/en
Publication of JPS5789939A publication Critical patent/JPS5789939A/en
Publication of JPS5838289B2 publication Critical patent/JPS5838289B2/en
Expired legal-status Critical Current

Links

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C48/00—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor
    • B29C48/25—Component parts, details or accessories; Auxiliary operations
    • B29C48/78—Thermal treatment of the extrusion moulding material or of preformed parts or layers, e.g. by heating or cooling
    • B29C48/80—Thermal treatment of the extrusion moulding material or of preformed parts or layers, e.g. by heating or cooling at the plasticising zone, e.g. by heating cylinders
    • B29C48/83—Heating or cooling the cylinders
    • B29C48/832—Heating
    • 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
    • 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
    • B29C48/402—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 the screws having intermeshing parts
    • 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
    • B29C48/68—Barrels or cylinders
    • B29C48/685—Barrels or cylinders characterised by their inner surfaces, e.g. having grooves, projections or threads
    • B29C48/687—Barrels or cylinders characterised by their inner surfaces, e.g. having grooves, projections or threads having projections with a short length in the barrel direction, e.g. pins
    • 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
    • B29C48/78—Thermal treatment of the extrusion moulding material or of preformed parts or layers, e.g. by heating or cooling
    • B29C48/793—Thermal treatment of the extrusion moulding material or of preformed parts or layers, e.g. by heating or cooling upstream of the plasticising zone, e.g. heating in the hopper
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C48/00—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor
    • B29C48/03—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor characterised by the shape of the extruded material at extrusion
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C48/00—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor
    • B29C48/25—Component parts, details or accessories; Auxiliary operations
    • B29C48/268—Throttling of the flow, e.g. for cooperating with plasticising elements or for degassing

Landscapes

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

Description

【発明の詳細な説明】 本発明は２軸スクリュ式予熱フイーダに関する。[Detailed description of the invention] The present invention relates to a twin-screw preheating feeder.

従来より押出機内で均一な混合が行われ、成形品が物性
的に優れ、かつ外観も見映がし、押出量が増加する等の
利点があるため、成形機に樹脂原料を定量供給するフイ
ーダに前記原料を予備加熱する装置を設け、成形機内へ
の原料供給にあたり原料を予熱する方法が行われて来た
。Conventionally, the feeder supplies resin raw materials to the molding machine in a fixed amount because it has the advantages of uniform mixing inside the extruder, molded products with excellent physical properties and good appearance, and increased extrusion volume. A method has been used in which a device for preheating the raw material is installed, and the raw material is preheated before being supplied into the molding machine.

この方法は、原料を均一な塊状とし、成形機へ投入され
た時に既に予熱されているため、原料予熱のないま又成
形機に供給された原料と比べ、成形機内でゲル化するま
での時間が短かくて済む。In this method, the raw material is made into a uniform lump and is already preheated when fed into the molding machine, so it takes less time to gel in the molding machine compared to raw materials that are fed to the molding machine without preheating. can be short.

即ち成形機のスクリュおよび加熱シリンダが短かくて済
むので、成形機の価格的、重量的に非常に有利であるば
かりでなく、所要動力も小さくて済み同じ動力を使用す
れば押出能力が向上するという利点がある。In other words, since the screw and heating cylinder of the molding machine can be shortened, the molding machine is not only very advantageous in terms of price and weight, but also requires less power, and the extrusion capacity can be improved using the same power. There is an advantage.

しかし、この方法を行うための装置、例えば予熱フイー
ダによる樹脂原料の余熱過程において、樹脂原判によっ
ては大きな塊となるものも有り、そのような大きな塊が
有る原料がそのまΣ成形機に供給されると、前述のよう
なフイーダによる予熱の効果が十分に発揮されず、原料
の均一な分散、混合は行われず、従って、成形品も品質
むらが出来る。However, during the preheating process of the resin raw material using the equipment used to carry out this method, such as a preheating feeder, some resin base materials may form large lumps, and the raw materials with such large lumps are fed directly to the Σ molding machine. If this happens, the effect of preheating by the feeder as described above will not be sufficiently exerted, and the raw materials will not be uniformly dispersed and mixed, resulting in uneven quality of the molded product.

また、成形機の押出量を増加させたい場合、フイーダか
らの樹脂原料の供給を当然増加させる必要があるが、予
熱する関係上、樹脂原料はヒータ等の容量を上げたり、
スクリュ等の長さを増大しない限り、所定の予熱温度ま
で上昇しないという欠点が有る。In addition, if you want to increase the extrusion amount of the molding machine, it is naturally necessary to increase the supply of resin raw material from the feeder, but in order to preheat the resin raw material, increase the capacity of the heater etc.
There is a drawback that the temperature does not rise to a predetermined preheating temperature unless the length of the screw etc. is increased.

さらにヒータ等の容量アップは樹脂原料に対し局部的な
可塑化を進行させるため均一な塊状化が防げられる。Furthermore, increasing the capacity of a heater or the like promotes local plasticization of the resin raw material, thereby preventing uniform agglomeration.

本発明は前述のような欠点を取除き、予熱フイーダ内に
おける予熱過程で樹脂原料が大きな塊となるのを防ぐと
ともに、樹脂原料が均一に分散され、混合が行われかつ
、ヒータ等の容量を上ることなく、樹脂温度を上昇させ
るような予熱フイーダを提供することである。The present invention eliminates the above-mentioned drawbacks, prevents the resin raw material from forming large lumps during the preheating process in the preheating feeder, and enables the resin raw material to be uniformly dispersed and mixed while reducing the capacity of the heater, etc. To provide a preheating feeder that can raise the temperature of a resin without raising the temperature of the resin.

次に第１図ないし第３図により本発明の１実施例を説明
すると、１は外周面に加熱用ヒータ２を取付たバレルで
、内部に互いに噛合う異方向回転する２軸スクリュ３が
挿嵌されている。Next, one embodiment of the present invention will be described with reference to FIGS. 1 to 3. Reference numeral 1 denotes a barrel with a heater 2 attached to its outer circumferential surface, and a twin screw 3 that meshes with each other and rotates in different directions is inserted inside. It is fitted.

前記スクリュ３は図示してない歯車列等を介して駆動モ
ータ４により回転するようになっており、ホッパ５から
投入された樹脂原料が前記スクリュ３の回転に伴い前方
（図中左向）へ移送され、前記バレル１の外周面に取付
けられた加熱用ヒータ２からの熱を受け、所定温度に熱
められ、排出口６より図示してない成形機へ供給される
。The screw 3 is rotated by a drive motor 4 via a gear train (not shown), and the resin raw material introduced from the hopper 5 moves forward (towards the left in the figure) as the screw 3 rotates. The material is transferred and heated to a predetermined temperature by receiving heat from the heater 2 attached to the outer circumferential surface of the barrel 1, and then supplied from the discharge port 6 to a molding machine (not shown).

前記スクリュ３は前述のように互いに噛合い異方向回転
するので夫々のフライト面に付着した樹脂原料を掻落す
セルフクリーニング作用を行うためフイーダ内に滞留が
起きないばかりでなく原料も均一な混線が行われる。As mentioned above, the screws 3 mesh with each other and rotate in different directions, so that they perform a self-cleaning action to scrape off the resin raw material adhering to the respective flight surfaces, so that not only will no accumulation occur in the feeder, but the raw materials will also be uniformly mixed. It will be done.

また第３図のようにホツパ５の下部附近の樹脂原料受入
域Ａの原料搬送容積より前記受入域Ａより排出口６に至
る区域Ｂにおける原料搬送容積の方が、予熱による樹脂
原料の体積増加分だけ大きくしてある。Furthermore, as shown in Fig. 3, the volume of resin raw material increased due to preheating is greater than the raw material conveyance volume in area B extending from the receiving area A to the discharge port 6 than the raw material conveying volume in the resin raw material receiving area A near the lower part of the hopper 5. I made it bigger by that amount.

即ち前記区域Ｂのフライト３ｂが形成するスクリュ溝７
の容積は前記受入域Ａのフライト３ａが形成するスクリ
ュ溝８より、樹脂原料の予熱による体積増加分だけ大き
くなっている。That is, the screw groove 7 formed by the flights 3b in the area B
The volume is larger than that of the screw groove 8 formed by the flights 3a in the receiving area A by the volume increase due to preheating of the resin raw material.

そのため全長に亘って搬送容積の同一な従来スクリュと
比べ予熱による原料の膨張の結果、スクリュ溝内に強制
的に樹脂原料が詰め込まれることがなく、均一分散、混
合作用が良好に行われるようになっている。Therefore, compared to conventional screws that have the same conveyance volume over the entire length, as a result of the expansion of the raw material due to preheating, the resin raw material is not forcibly packed into the screw groove, and uniform dispersion and mixing action can be performed well. It has become.

さらに前記スクリュ３は区域Ｂにおけるフライト３ｂを
スクリュ軸方向に所定範囲Ｃだけ底部が谷径ｄと一致す
る外周に沿った切欠き９が設けてある。Furthermore, the screw 3 is provided with a notch 9 along the outer periphery of the flight 3b in the area B by a predetermined range C in the direction of the screw axis, the bottom of which coincides with the root diameter d.

前記切欠き９部分には第１図および第２図に示すように
バレル１よりブロックパー１０が放射状に複数個突出さ
れており、その先端は前記スクリュ谷径ｄと所定間隙を
保つようになっている。As shown in FIGS. 1 and 2, a plurality of block pars 10 protrude radially from the barrel 1 in the notch 9 portion, and the tip thereof maintains a predetermined gap with the screw root diameter d. ing.

そのため、もし予熱により樹脂原料が大きな塊となった
場合でも、前記ブロックパー１０の先端とスクリュ谷径
ｄとの間に形成された間隙を前記樹脂原料が通過する際
大きな塊は小さな塊に壊わされ、当初に掲げた欠点は取
除かれる。Therefore, even if the resin raw material becomes a large lump due to preheating, the large lump will be broken into small lumps when the resin raw material passes through the gap formed between the tip of the block parr 10 and the screw root diameter d. and the deficiencies listed at the beginning are removed.

また、前記間隙を通過する際の剪断作用により樹脂原料
は昇温するため、成形機への原料供給量が増加した場合
でも、ヒータ容量を上げることなく所定の予熱温度にす
ることが出来る。Further, since the temperature of the resin raw material rises due to the shearing action when passing through the gap, even if the amount of raw material supplied to the molding machine increases, it is possible to reach a predetermined preheating temperature without increasing the heater capacity.

もちろん、この際、温度検知装置により、温度調節を行
うことは当然である。Of course, at this time, it is natural to adjust the temperature using a temperature detection device.

また前記実施例では樹脂原料予熱用にバレルに設けたヒ
ータを使用したが、これに限らず、樹脂原料に熱を与え
る手段なら何でも良く、例えば、バレル内のスクリュ軸
内部にカートリッジヒータを設けたり、スクリュ軸内部
に熱媒体を導入することも出来る。Further, in the above embodiment, a heater installed in the barrel was used to preheat the resin raw material, but this is not limited to this, and any means for applying heat to the resin raw material may be used. For example, a cartridge heater may be installed inside the screw shaft in the barrel. , it is also possible to introduce a heat medium inside the screw shaft.

次に、本発明による実施例と、フロックバーを設けない
従来例とを、原料搬送量（Ｒ，ＰＶＣパウダー）と排出
される原料の温度を比較した結果を示すと、第４図のグ
ラフのようになり、例えば搬送量４５０ｋｇ／Ｈの場合
、本発明による実施例と従来例とでは６゜Ｃ程の違があ
り、明らかに本発明によるブロックバーによる効果が表
われているのが解される。Next, the results of comparing the raw material conveyance amount (R, PVC powder) and the temperature of the discharged raw material between the embodiment according to the present invention and the conventional example without a flock bar are shown in the graph of Fig. 4. For example, in the case of a conveyance rate of 450 kg/H, there is a difference of about 6°C between the embodiment according to the present invention and the conventional example, and it can be seen that the effect of the block bar according to the present invention is clearly exhibited. Ru.

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

第１図は本発明による１実施例を示す図。 第２図は第１図における断面Ｉ−Ｉ図。 第３図は説明図で、スクリュの詳細図。 第４図は樹脂原料の搬送量と排出される原料の樹脂温度
の関係を示したグラフ。 １・・・・・・バレル、２・・・・・・ヒータ、３・・
・・・・スクリュ５・・・・・・ホッパ、６・・・・・
・排出口、９・・・・・・切欠き、１０・・・・・・フ
ロックバー。FIG. 1 is a diagram showing one embodiment according to the present invention. FIG. 2 is a cross-sectional view taken along line II in FIG. FIG. 3 is an explanatory diagram and shows a detailed diagram of the screw. FIG. 4 is a graph showing the relationship between the conveyed amount of resin raw material and the resin temperature of the discharged raw material. 1... Barrel, 2... Heater, 3...
... Screw 5 ... Hopper, 6 ...
- Discharge port, 9...notch, 10...flock bar.

Claims (1)

【特許請求の範囲】[Claims] １ バレル内に２軸スクリュを有し、ホッパ等から投入
される樹脂原料を押出或形機等に供給する前に予熱する
フィーダにおいて、前記スクリュのホッパ下部附近の原
料受入域における原料搬送容積より同受入域以後で原料
排出口に至る区域における原料搬送容積を余熱ｋよる樹
脂原料の体積増加を見込んだ分だけ大きくしたスクリュ
を有し、前記原料受入域以後の区域のスクリュフライト
にスクリュ軸方向に所定範囲だけ底部が谷径と一致する
外周に沿った切欠き部を設け、同切欠き部にスクリュ谷
径に対し所定の小間隙を保つようなブロックバーを複数
個前記バレルから放射状に設けたことを特徴とする２軸
スクリュ式予熱フイーダ。1 In a feeder that has a twin screw in the barrel and preheats the resin raw material input from a hopper etc. before supplying it to an extrusion or shaping machine, etc., the raw material conveying volume in the raw material receiving area near the bottom of the hopper of the screw The screw has a screw whose raw material conveying volume in the area leading to the raw material discharge port after the receiving area is increased by an amount that takes into account the volume increase of the resin raw material due to residual heat k, and the screw flight in the area after the raw material receiving area is arranged in the screw axial direction. A notch is provided along the outer periphery of the screw whose bottom portion coincides with the root diameter within a predetermined range, and a plurality of block bars are provided radially from the barrel to maintain a predetermined small gap with respect to the screw root diameter in the notch. A twin-screw preheating feeder characterized by the following features:
JP55167060A 1980-11-27 1980-11-27 2-screw preheater Expired JPS5838289B2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP55167060A JPS5838289B2 (en) 1980-11-27 1980-11-27 2-screw preheater

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP55167060A JPS5838289B2 (en) 1980-11-27 1980-11-27 2-screw preheater

Publications (2)

Publication Number Publication Date
JPS5789939A JPS5789939A (en) 1982-06-04
JPS5838289B2 true JPS5838289B2 (en) 1983-08-22

Family

ID=15842648

Family Applications (1)

Application Number Title Priority Date Filing Date
JP55167060A Expired JPS5838289B2 (en) 1980-11-27 1980-11-27 2-screw preheater

Country Status (1)

Country Link
JP (1) JPS5838289B2 (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS59173222U (en) * 1983-05-04 1984-11-19 大精電子株式会社 switchgear
JPS60103444U (en) * 1983-12-20 1985-07-15 株式会社　大倉カコ−キ Iimori machine

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE4421117C2 (en) * 1994-06-16 1996-08-14 Krauss Maffei Ag Device for loading injection molding and extruder units with viscous materials
CN113580533A (en) * 2021-08-17 2021-11-02 安徽泓泽新材料科技有限公司 Multifunctional adjustable double-screw extruder unit and processing technology thereof

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS59173222U (en) * 1983-05-04 1984-11-19 大精電子株式会社 switchgear
JPS60103444U (en) * 1983-12-20 1985-07-15 株式会社　大倉カコ−キ Iimori machine

Also Published As

Publication number Publication date
JPS5789939A (en) 1982-06-04

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