JPH05338008A - Extrusion molding method of hard kneading material and molding equipment thereof - Google Patents

Extrusion molding method of hard kneading material and molding equipment thereof

Info

Publication number
JPH05338008A
JPH05338008A JP4145564A JP14556492A JPH05338008A JP H05338008 A JPH05338008 A JP H05338008A JP 4145564 A JP4145564 A JP 4145564A JP 14556492 A JP14556492 A JP 14556492A JP H05338008 A JPH05338008 A JP H05338008A
Authority
JP
Japan
Prior art keywords
molding
kneading
molten material
cylinder
gear pump
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.)
Pending
Application number
JP4145564A
Other languages
Japanese (ja)
Inventor
Toshitaka Fukunaga
年隆 福永
Takeo Takahashi
武夫 高橋
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.)
Sekisui Chemical Co Ltd
Original Assignee
Sekisui Chemical 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 Sekisui Chemical Co Ltd filed Critical Sekisui Chemical Co Ltd
Priority to JP4145564A priority Critical patent/JPH05338008A/en
Publication of JPH05338008A publication Critical patent/JPH05338008A/en
Pending 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
    • B29C48/36—Means for plasticising or homogenising the moulding material or forcing it through the nozzle or die
    • B29C48/465—Means for plasticising or homogenising the moulding material or forcing it through the nozzle or die using rollers
    • 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
    • B29C48/001—Combinations of extrusion moulding with other shaping operations
    • B29C48/0018—Combinations of extrusion moulding with other shaping operations combined with shaping by orienting, stretching or shrinking, e.g. film blowing
    • 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
    • B29C48/07—Flat, e.g. panels
    • B29C48/08—Flat, e.g. panels flexible, e.g. films
    • 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
    • B29C48/365—Means for plasticising or homogenising the moulding material or forcing it through the nozzle or die using pumps, e.g. piston pumps
    • B29C48/37—Gear pumps
    • 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
    • B29C48/42—Non-identical or non-mirrored screws

Abstract

PURPOSE:To provide the extrusion molding method of hard kneading material and its device, with which the simplification of manufacturing processes, the application of a kneader having low pressure resistant performance against material pressuring, the shortening of production time and the continuous manufacturing of product in continuous length having uniform shape, and the like, are embodied. CONSTITUTION:After raw material is kneaded with a kneader 2, then melted and extruded in the form of molten material, the molten material, the molten material is delivered through a gear pump 8 to a mold 10. In this case, by making the suction pressure of the gear pump 8 constant in response to the pressure of material extruded from the kneader 2, the backpressure of the following mold 10 can be maintained higher. Consequently, the uniformalization of the shape is ensured. At the same time, processes for finely cutting, cooling, storing and the like of the molten material can be omitted, resulting in allowing to contribute to the miniaturization of the device, the reduction of the space occupied by the device and the like by the amount corresponding to the omitted processes.

Description

【発明の詳細な説明】Detailed Description of the Invention

【０００１】[0001]

【産業上の利用分野】本発明は、例えば難混練性材料
（例えば高粘度ゴム材料、無機質高充填合成樹脂材料）
を混練、溶融し、これを成形金型に吐出して、例えば長
尺のシート体や管体を製造するのに有用な押出成形方法
及びその成形装置に関するものである。BACKGROUND OF THE INVENTION The present invention is, for example, a difficult-to-knead material (for example, a highly viscous rubber material, an inorganic highly filled synthetic resin material)
TECHNICAL FIELD The present invention relates to an extrusion molding method and a molding apparatus therefor which are useful for, for example, manufacturing a long sheet body or a tubular body by kneading, melting, and discharging the mixture into a molding die.

【０００２】[0002]

【従来の技術】従来、この種の材料の押出成形の手法と
しては、難混練性材料を混練する（混練工程）ための混
練機たるニーダーと、該混練された溶融材料を供給する
（給送工程）ための押出スクリュー機構（２軸テーパス
クリューを中核とする機構）有する押出機たるフィーダ
ールーダと、該フィーダールーダから押し出された溶融
材料をペレット状に細断する（造粒工程）ためのペレタ
イザーと、該細断されたペレット状材料を冷却し、該冷
却されたペレット状材料を一旦貯溜する（貯溜工程）た
めのタンク装置と、該タンク装置に貯溜された材料を適
宜に抽出し、これを再溶融して押し出す（押出工程）た
めの単軸押出機と、該単軸押出機から押出された再溶融
材料を成形金型により長尺の成形体（シート体、管体）
を成形する（成形工程）ための押出成形機とを備えた構
成の技術（第１の従来技術）が知られている。2. Description of the Related Art Conventionally, as a method of extrusion molding of this kind of material, a kneader as a kneading machine for kneading a difficultly kneading material (kneading step) and supplying (feeding) the kneaded molten material. Extruder) having an extrusion screw mechanism (a mechanism having a twin taper screw as a core) for the process), and a pelletizer for chopping the molten material extruded from the feeder ruder into pellets (granulation step) And a tank device for cooling the shredded pellet-shaped material and temporarily storing the cooled pellet-shaped material (storing step), and appropriately extracting the material stored in the tank device. A single-screw extruder for remelting and extruding (extruding step), and a re-melted material extruded from the single-screw extruder into a long molded body (sheet body, tubular body)
There is known a technology (first conventional technology) having a configuration including an extruder for molding (molding step).

【０００３】また、前記難混練性材料を混練するための
混練機（連続捏和機）として、特開昭５８ー９８１２８
号公報に記載されるように、難混練性材料が投入される
シリンダと、該シリンダ内に軸回り方向に回転自在に配
設されるスクリュー軸と、該スクリュー軸の先端側に形
成される適数の回転円板と、前記シリンダに固定され前
記回転円板の間に配設される適数の固定円板とを有し、
前記難混練性材料を混練・溶融して前記スクリュー軸の
基端側から先端側に向けて押し出すように構成されたも
のが開示されている。そして、該混練機を用いて以下の
各工程、すなわち前記給送工程から前記成形工程に至る
手順に従う第２の従来技術が知られている。Further, as a kneading machine (continuous kneading machine) for kneading the above-mentioned difficult-to-mix material, there is disclosed in Japanese Patent Laid-Open No. 98-128128.
As described in Japanese Patent Laid-Open Publication No. 2004-242242, a cylinder into which a hardly kneading material is put, a screw shaft rotatably arranged in the cylinder in the axial direction, and an appropriate screw formed on the tip side of the screw shaft. A number of rotating discs, and a fixed number of fixed discs fixed to the cylinder and arranged between the rotating discs,
It is disclosed that the hardly kneading material is kneaded and melted and is extruded from the base end side of the screw shaft toward the tip end side. A second conventional technique is known in which the following steps are performed using the kneading machine, that is, the procedure from the feeding step to the molding step is performed.

【０００４】[0004]

【発明が解決しようとする課題】しかしながら、上記第
１の従来技術の手法では、混練機たるニーダーの直後に
設けられる押出機（フィーダールーダー）は混練機から
供給された溶融材料を後続の工程に向けて単に押し出す
機能を有するに過ぎないので、材料供給の定量性が欠如
し、そのため最終製品（シート体、管体）の厚み、シー
ト幅、管径等の形状の均一性を確保することができず、
品質管理の点で問題がある。However, in the method of the first prior art described above, the extruder (feeder ruder) provided immediately after the kneader, which is a kneading machine, uses the molten material supplied from the kneading machine in the subsequent step. Since it only has the function of pushing out toward the end, it lacks the quantitativeness of material supply, so that it is possible to ensure the uniformity of the shape such as the thickness, sheet width, pipe diameter of the final product (sheet body, pipe body). I can't
There is a problem in quality control.

【０００５】他方、上記第２の従来技術の手法では、混
練機（連続捏和機）が回転円板や固定円板を用いて材料
の混練流路の構造を複雑にしているので、その分材料の
吐出圧を上げることが困難であり、その結果、該混練機
から吐出された溶融材料をそのまま押出成形機に導入し
ようとすると成形金型内での材料の圧力損失が生じても
これを補うための材料の圧力を混練機側で生成させるこ
とができない。従って、押出成形機の上流側では材料の
圧力を高めるため増圧手段を設ける必要がある他、本従
来技術の場合も混練機は混練・溶融機能を有するに過ぎ
ないので吐出量の定量性を確保することはできない。On the other hand, in the method of the second prior art, the kneading machine (continuous kneading machine) uses a rotating disk or a fixed disk to complicate the structure of the material kneading flow path. It is difficult to increase the discharge pressure of the material. As a result, even if the molten material discharged from the kneading machine is directly introduced into the extrusion molding machine, even if pressure loss of the material occurs in the molding die, The pressure of the compensating material cannot be generated on the kneader side. Therefore, on the upstream side of the extruder, it is necessary to provide a pressure increasing means in order to increase the pressure of the material, and in the case of this conventional technique, the kneading machine has only the kneading / melting function, so that the discharge amount can be quantitatively determined. It cannot be secured.

【０００６】さらには、上記いずれの従来技術の構成に
よっても、成形材料は、材料供給、混練、溶融、押し出
し、冷却、ストック、抽出、材料増圧、再溶融、押出、
成形等という一連の長い工程を必要とするので、装置全
体が大型化し装置据え付けスペースが広大となり、装置
建設費用、装置維持費用が高くなり、消費電力が高騰
し、全製造ラインの所要時間が長くなる等の問題があ
る。Further, in any of the above-mentioned conventional configurations, the molding material is supplied, kneaded, melted, extruded, cooled, stocked, extracted, pressurized, remelted, extruded,
Since a series of long processes such as molding are required, the entire device becomes large and the installation space of the device becomes vast, the device construction cost and the device maintenance cost increase, the power consumption rises, and the time required for the entire manufacturing line is long. There is a problem such as becoming.

【０００７】本発明は、上記従来技術の課題を解決する
べくなされたものであり、製造工程の簡略化を実現さ
せ、従前の材料圧の耐圧性能の低い混練機を流用するこ
とができ、製造時間の短縮等を可能とし、しかも均一な
形状の長尺製品を連続して得ることができる等とした難
混練性材料の押出成形方法及びその装置を提供すること
を目的とする。The present invention has been made to solve the above-mentioned problems of the prior art, realizes simplification of the manufacturing process, and can use a conventional kneader having a low pressure resistance of material pressure. An object of the present invention is to provide a method and apparatus for extrusion-molding a difficult-to-knead material, which can shorten the time, etc. and can continuously obtain a long product having a uniform shape.

【０００８】[0008]

【課題を解決するための手段】上記目的を達成するべ
く、請求項１の発明は、難混練性材料が投入されるシリ
ンダと、該シリンダ内に軸回り方向に回転自在に配設さ
れるスクリュー軸と、該スクリュー軸の先端側に形成さ
れる適数の回転円板と、前記シリンダに固定され前記回
転円板の間に配設される適数の固定円板とを有し、前記
難混練性材料を混練・溶融して前記スクリュー軸の基端
側から先端側に向けて押し出すように構成された混練機
を備えることにより、該混練機に後続する成形金型から
長尺成形体を連続して成形させる押出成形方法におい
て、該混練機から吐出された溶融材料を一旦ギアポンプ
に吸入させ、しかる後、該ギアポンプから吐出した溶融
材料を成形金型に注入するようにしたことを特徴とす
る。In order to achieve the above object, the invention of claim 1 is a cylinder into which a hardly kneading material is charged, and a screw disposed in the cylinder so as to be rotatable in the axial direction. A shaft, an appropriate number of rotating discs formed on the tip side of the screw shaft, and an appropriate number of fixed discs fixed to the cylinder and arranged between the rotating discs. By providing a kneading machine configured to knead and melt the material and extrude from the base end side to the tip side of the screw shaft, a long molding can be continuously formed from a molding die following the kneading machine. In the extrusion molding method in which the molding is performed, the molten material discharged from the kneader is sucked into the gear pump once, and then the molten material discharged from the gear pump is injected into the molding die.

【０００９】また、請求項２の発明は、難混練性材料が
投入されるシリンダと、該シリンダ内に軸回り方向に回
転自在に配設されるスクリュー軸と、該スクリュー軸の
先端側に形成される適数の回転円板と、前記シリンダに
固定され前記回転円板の間に配設される適数の固定円板
とを有し、前記難混練性材料を混練・溶融して前記スク
リュー軸の基端側から先端側に向けて押し出すように構
成された混練機と、該混練機により得られた溶融材料を
吸入して所定のスラスト方向に向けて吐出するギアポン
プと、該ギアポンプから吐出された溶融材料を注入して
所定形状の長尺成形体を前記スラスト方向に押し出す成
形金型と、を備えたことを特徴とする。Further, the invention according to claim 2 is such that a cylinder into which a hardly kneading material is charged, a screw shaft rotatably arranged in the cylinder in a direction around an axis, and a tip end side of the screw shaft are formed. A suitable number of rotating discs and a fixed number of fixed discs fixed to the cylinder and arranged between the rotating discs, and kneading / melting the hardly kneadable material to form the screw shaft. A kneading machine configured to extrude from the base end side toward the tip end side, a gear pump that sucks the molten material obtained by the kneading machine and discharges it toward a predetermined thrust direction, and a kneading machine that discharges from the gear pump A molding die for injecting a molten material and extruding a long molded body having a predetermined shape in the thrust direction.

【００１０】[0010]

【作用】難混練性材料たる原料が混練機によって混練・
溶融され、該溶融材料は直ちにギアポンプを介して押出
成形機の成形金型に向けて吐出される。この場合、ギア
ポンプに吸入された溶融材料はギアポンプの回転数を適
宜制御することにより所定の材料圧力をを得ることがで
きるようになる。従って、材料の成形時の吐出圧力上昇
を可能にして成形体の形状の均一化を実現できる一方、
全体として、ペレット化のための細断工程、その後の材
料の冷却、貯溜等の工程を省略できるので、その分装置
の小型化、装置スペースの縮小化等に貢献できる。[Function] Kneading and mixing of raw materials that are difficult to knead materials
After being melted, the molten material is immediately discharged through a gear pump to a molding die of an extruder. In this case, the molten material sucked into the gear pump can obtain a predetermined material pressure by appropriately controlling the rotation speed of the gear pump. Therefore, it is possible to increase the discharge pressure at the time of molding the material and realize the uniformity of the shape of the molded body.
As a whole, the step of shredding for pelletization, the subsequent steps of cooling the material, storing, etc. can be omitted, which contributes to the miniaturization of the apparatus and the reduction of the apparatus space.

【００１１】[0011]

【実施例】図１は、本発明に係る方法を実施するための
装置の一例を示すものである。原料投入用ホッパー１の
下流端側には混練機２が設けられており、該混練機２は
前記原料が投入されるシリンダ３と、該シリンダ３内に
軸回り方向に回転自在に配設される２本のスクリュー軸
４Ａ、４Ｂと、該スクリュー軸４Ａの先端側に形成され
る適数の回転円板５と、前記シリンダ３に固定され前記
回転円板５の間に配設される適数の固定円板６とを有
し、両円板５、６を通過した溶融材料は吐出口７を介し
て押し出されるように構成されている。1 shows an example of an apparatus for carrying out the method according to the invention. A kneading machine 2 is provided on the downstream end side of the raw material charging hopper 1. The kneading machine 2 is provided with a cylinder 3 into which the raw material is charged, and is rotatably arranged in the cylinder 3 in an axial direction. Two screw shafts 4A and 4B, an appropriate number of rotating discs 5 formed on the tip side of the screw shaft 4A, and an appropriate rotating disc 5 fixed to the cylinder 3 and arranged between the rotating discs 5. And a fixed number of fixed circular plates 6, and the molten material that has passed through both circular plates 5, 6 is configured to be extruded through a discharge port 7.

【００１２】なお、前記原料は、例えば密度が０．９３
ｇ／ｃｍ3以下の低密度ポリエチレン樹脂を主成分と
し、無機充填剤を混合して成るものである一方、前記ス
クリュー軸４Ａ、Ｂはホッパー１の近傍ではその外径
が、例えば１３０ｍｍであり、吐出口７の近傍ではその
外径が６５ｍｍである。The raw material has a density of 0.93, for example.
On the other hand, the screw shafts 4A and 4B have an outer diameter of, for example, 130 mm in the vicinity of the hopper 1, while the main component is a low-density polyethylene resin of g / cm 3 or less and an inorganic filler is mixed. The outer diameter is 65 mm in the vicinity of the discharge port 7.

【００１３】前記吐出口７の下流側にはギアポンプ８が
設けられており、該ギアポンプ８の下流側には押出成形
機９の成形金型（Ｔ型ダイス）１０が設けられている。A gear pump 8 is provided on the downstream side of the discharge port 7, and a molding die (T die) 10 of an extrusion molding machine 9 is provided on the downstream side of the gear pump 8.

【００１４】前記成形金型１０の下流側には製品（シー
ト体）１１を引き取るための繰り出しロール１２が設け
られており、該繰り出しロール１２により引き取られた
製品１１は、巻取機１３に巻き取られるようになってい
る。On the downstream side of the molding die 10, there is provided a payout roll 12 for drawing a product (sheet body) 11, and the product 11 taken up by the payout roll 12 is wound on a winder 13. It is supposed to be taken.

【００１５】上記のように構成された本実施例の作動に
つき、製品たるシート体１１（例えば厚みが２ｍｍでシ
ート幅が４００ｍｍであるもの）を成形例とする実験例
を挙げて説明する。The operation of the present embodiment configured as described above will be described with reference to an experimental example using a sheet body 11 (for example, a product having a thickness of 2 mm and a sheet width of 400 mm) as a molding example.

【００１６】ホッパー１に投入された原料は、混練機２
により十分な混練が行われた後、溶融材料（材料圧を、
例えば７０ｋｇ／ｃｍ2に設定）となってギアポンプ８
に吸入され、該溶融材料は成形金型１０に導入される。
該成形金型１０における成形温度を、例えば１３０℃と
し、押出量を５０ｋｇ／ｃｍ2に設定すると、このとき
の金型背圧は１４３ｋｇ／ｃｍ2となる。The raw materials put in the hopper 1 are mixed in the kneading machine 2
After sufficient kneading has been carried out by the
For example, set to 70 kg / cm 2 ) and the gear pump 8
And the molten material is introduced into the molding die 10.
When the molding temperature of the molding die 10 is set to 130 ° C. and the extrusion rate is set to 50 kg / cm 2 , the die back pressure at this time is 143 kg / cm 2 .

【００１７】かかる成形条件に基づくシート体１１は、
シート厚みが２．０ｍｍ±０．０５ｍｍの精度で成形さ
れる。シート体１１の製造の全体の工程としては、混練
機２による混練、ギアポンプ８による吐出、成形金型１
０による成形という極めて短縮されたものとなる。The sheet body 11 based on such molding conditions is
The sheet is molded with an accuracy of 2.0 mm ± 0.05 mm. The overall steps of manufacturing the sheet body 11 include kneading by the kneading machine 2, discharging by the gear pump 8, and the molding die 1.
The molding by 0 is extremely shortened.

【００１８】なお、成形条件として、同一の原料を用
い、成形温度を同一とし、押出量を１００ｋｇ／ｃｍ2
に設定すると、溶融材料の材料圧は８０ｋｇ／ｃｍ2と
なり、このときの金型背圧は１７０ｋｇ／ｃｍ2とな
る。本条件でのシート体１１は、シート厚みが２．０ｍ
ｍ±０．０７ｍｍの精度で成形される。As the molding conditions, the same raw material was used, the molding temperature was the same, and the extrusion rate was 100 kg / cm 2.
When set to, the material pressure of the molten material is 80 kg / cm 2 , and the die back pressure at this time is 170 kg / cm 2 . The sheet body 11 under these conditions has a sheet thickness of 2.0 m.
It is molded with an accuracy of m ± 0.07 mm.

【００１９】因みに、本実施例の構成のようなギアポン
プ８を用いない場合、成形金型１０における成形温度
を、例えば１３０℃とし、押出量を５０ｋｇ／ｃｍ2に
設定すると、スクリュー軸４Ａの先端側での溶融樹脂の
圧力を１４５ｋｇ／ｃｍ2としても、押出量を上げるこ
とができないばかりか、シート厚みは２．０ｍｍ±０．
３ｍｍの精度でしか製造することができない。すなわ
ち、本発明の構成では従前に比べて製品の寸法精度を１
０倍程度高めることができる。Incidentally, when the gear pump 8 as in this embodiment is not used, if the molding temperature in the molding die 10 is set to 130 ° C. and the extrusion rate is set to 50 kg / cm 2 , the tip of the screw shaft 4A is set. Even if the pressure of the molten resin on the side is 145 kg / cm 2 , the extrusion amount cannot be increased, and the sheet thickness is 2.0 mm ± 0.
It can only be manufactured with an accuracy of 3 mm. That is, in the configuration of the present invention, the dimensional accuracy of the product is 1
It can be increased about 0 times.

【００２０】[0020]

【発明の効果】以上のように、請求項１の発明によれ
ば、難混練性材料が投入されるシリンダと、該シリンダ
内に軸回り方向に回転自在に配設されるスクリュー軸
と、該スクリュー軸の先端側に形成される適数の回転円
板と、前記シリンダに固定され前記回転円板の間に配設
される適数の固定円板とを有し、前記難混練性材料を混
練・溶融して前記スクリュー軸の基端側から先端側に向
けて押し出すように構成された混練機を備えることによ
り、該混練機に後続する成形金型から長尺成形体を連続
して成形させる押出成形方法において、該混練機から吐
出された溶融材料を一旦ギアポンプに吸入させ、しかる
後、該ギアポンプから吐出した溶融材料を成形金型に注
入するようにしたことを特徴とするので、材料の耐圧性
能が劣る混練機を使用しても成形金型における十分な金
型背圧を確保でき、長尺製品の寸法精度の向上を図るこ
とができる。また、溶融材料の細断、冷却、ストック、
抽出等の工程が省略されるので、装置全体の小型化、装
置の据え付けスペースの縮小化を実現でき、装置建設費
用、装置維持費用の低廉化が可能となり、消費電力の削
減、全製造ラインの所要時間の短縮、ひいては製品のコ
ストダウンを図れる。As described above, according to the invention of claim 1, the cylinder into which the hardly kneading material is charged, the screw shaft rotatably arranged in the cylinder in the axial direction, An appropriate number of rotating discs formed on the tip side of the screw shaft, and an appropriate number of fixed discs fixed to the cylinder and arranged between the rotating discs, and kneading the hardly kneading material. Extrusion for continuously molding a long molded body from a molding die following the kneading machine by providing a kneading machine configured to melt and extrude from the base end side of the screw shaft toward the tip end side. In the molding method, the molten material discharged from the kneading machine is once sucked into the gear pump, and then the molten material discharged from the gear pump is injected into the molding die. Use a kneader with poor performance Can also ensure sufficient mold back pressure at the molding die, it is possible to improve the dimensional accuracy of long products. Also, shredded, cooled, stock of molten material,
Since steps such as extraction are omitted, the overall size of the device can be reduced, the installation space for the device can be reduced, and the device construction cost and device maintenance cost can be reduced. The required time can be shortened and the cost of the product can be reduced.

【００２１】また、請求項２の発明は、難混練性材料が
投入されるシリンダと、該シリンダ内に軸回り方向に回
転自在に配設されるスクリュー軸と、該スクリュー軸の
先端側に形成される適数の回転円板と、前記シリンダに
固定され前記回転円板の間に配設される適数の固定円板
とを有し、前記難混練性材料を混練・溶融して前記スク
リュー軸の基端側から先端側に向けて押し出すように構
成された混練機と、該混練機により得られた溶融材料を
吸入して所定のスラスト方向に向けて吐出するギアポン
プと、該ギアポンプから吐出された溶融材料を注入して
所定形状の長尺体を前記スラスト方向に押し出す成形金
型と、を備えたことを特徴とするので、請求項１の発明
を容易かつ具体的に実施することができる。Further, in the invention of claim 2, the cylinder into which the hardly kneading material is charged, the screw shaft rotatably arranged in the cylinder in the axial direction, and the screw shaft are formed at the tip end side of the screw shaft. A suitable number of rotating discs and a fixed number of fixed discs fixed to the cylinder and arranged between the rotating discs, and kneading / melting the hardly kneadable material to form the screw shaft. A kneading machine configured to extrude from the base end side toward the tip side, a gear pump that sucks the molten material obtained by the kneading machine and discharges the molten material in a predetermined thrust direction, and a kneader that is discharged from the gear pump A molding die for injecting a molten material and extruding a long body having a predetermined shape in the thrust direction is provided. Therefore, the invention of claim 1 can be implemented easily and concretely.

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

【図１】本発明の一実施例を示す概略構成図である。FIG. 1 is a schematic configuration diagram showing an embodiment of the present invention.

【符号の説明】[Explanation of symbols]

２ 混練機、 ３ シリンダ、 ４Ａ スクリュー軸、 ５ 回転円板、 ６ 固定円板、 ８ ギアポンプ、 １０ 成形金型。 2 kneaders, 3 cylinders, 4A screw shaft, 5 rotating discs, 6 fixed discs, 8 gear pumps, 10 molding dies.

Claims (2)

【特許請求の範囲】[Claims] 【請求項１】 難混練性材料が投入されるシリンダと、
該シリンダ内に軸回り方向に回転自在に配設されるスク
リュー軸と、該スクリュー軸の先端側に形成される適数
の回転円板と、前記シリンダに固定され前記回転円板の
間に配設される適数の固定円板とを有し、前記難混練性
材料を混練・溶融して前記スクリュー軸の基端側から先
端側に向けて押し出すように構成された混練機を備える
ことにより、該混練機に後続する成形金型から長尺成形
体を連続して成形させる押出成形方法において、該混練
機から吐出された溶融材料を一旦ギアポンプに吸入さ
せ、しかる後、該ギアポンプから吐出した溶融材料を成
形金型に注入するようにしたことを特徴とする難混練性
材料の押出成形方法。1. A cylinder into which a hardly kneading material is charged,
A screw shaft rotatably disposed in the cylinder in the axial direction, an appropriate number of rotating discs formed on the tip side of the screw shaft, and fixed to the cylinder and disposed between the rotating discs. By having a kneading machine configured to knead and melt the difficult-to-knead material and push it toward the tip side from the base end side of the screw shaft, In an extrusion molding method for continuously molding a long molded body from a molding die following a kneading machine, the molten material discharged from the kneading machine is once sucked into a gear pump, and then the molten material discharged from the gear pump. A method for extrusion-molding a difficult-to-knead material, characterized in that is injected into a molding die. 【請求項２】 難混練性材料が投入されるシリンダと、
該シリンダ内に軸回り方向に回転自在に配設されるスク
リュー軸と、該スクリュー軸の先端側に形成される適数
の回転円板と、前記シリンダに固定され前記回転円板の
間に配設される適数の固定円板とを有し、前記難混練性
材料を混練・溶融して前記スクリュー軸の基端側から先
端側に向けて押し出すように構成された混練機と、該混
練機により得られた溶融材料を吸入して所定のスラスト
方向に向けて吐出するギアポンプと、該ギアポンプから
吐出された溶融材料を注入して所定形状の長尺成形体を
前記スラスト方向に押し出す成形金型と、を備えたこと
を特徴とする難混練性材料の押出成形装置。2. A cylinder into which a hardly kneading material is charged,
A screw shaft rotatably disposed in the cylinder in the axial direction, an appropriate number of rotating discs formed on the tip side of the screw shaft, and fixed to the cylinder and disposed between the rotating discs. And a kneading machine configured to knead and melt the hardly kneading material and push it out from the base end side to the tip side of the screw shaft, and A gear pump that sucks the obtained molten material and discharges the molten material in a predetermined thrust direction, and a molding die that injects the molten material discharged from the gear pump and pushes a long molded body of a predetermined shape in the thrust direction. An apparatus for extrusion-molding a hardly kneading material, which comprises:
JP4145564A 1992-06-05 1992-06-05 Extrusion molding method of hard kneading material and molding equipment thereof Pending JPH05338008A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP4145564A JPH05338008A (en) 1992-06-05 1992-06-05 Extrusion molding method of hard kneading material and molding equipment thereof

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP4145564A JPH05338008A (en) 1992-06-05 1992-06-05 Extrusion molding method of hard kneading material and molding equipment thereof

Publications (1)

Publication Number Publication Date
JPH05338008A true JPH05338008A (en) 1993-12-21

Family

ID=15388054

Family Applications (1)

Application Number Title Priority Date Filing Date
JP4145564A Pending JPH05338008A (en) 1992-06-05 1992-06-05 Extrusion molding method of hard kneading material and molding equipment thereof

Country Status (1)

Country Link
JP (1) JPH05338008A (en)

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JP2015182372A (en) * 2014-03-25 2015-10-22 積水化学工業株式会社 Method for producing film, and film
US9670351B2 (en) 2009-12-29 2017-06-06 Saint-Gobain Performance Plastics Corporation Flexible tubing material and method of forming the material

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Publication number Priority date Publication date Assignee Title
US9670351B2 (en) 2009-12-29 2017-06-06 Saint-Gobain Performance Plastics Corporation Flexible tubing material and method of forming the material
JP2015520264A (en) * 2012-06-06 2015-07-16 サン−ゴバン パフォーマンス プラスティックス コーポレイション Thermoplastic elastomer tube material and methods of making and using the same
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