JPH0114013B2 - - Google Patents

Info

Publication number
JPH0114013B2
JPH0114013B2 JP59101847A JP10184784A JPH0114013B2 JP H0114013 B2 JPH0114013 B2 JP H0114013B2 JP 59101847 A JP59101847 A JP 59101847A JP 10184784 A JP10184784 A JP 10184784A JP H0114013 B2 JPH0114013 B2 JP H0114013B2
Authority
JP
Japan
Prior art keywords
screw
flight
flights
screw element
section
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
JP59101847A
Other languages
Japanese (ja)
Other versions
JPS60245537A (en
Inventor
Kazuyuki Nakamura
Yukihiro Sumihiro
Tadaki Sakai
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.)
Japan Steel Works Ltd
Original Assignee
Japan Steel Works 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 Japan Steel Works Ltd filed Critical Japan Steel Works Ltd
Priority to JP59101847A priority Critical patent/JPS60245537A/en
Publication of JPS60245537A publication Critical patent/JPS60245537A/en
Publication of JPH0114013B2 publication Critical patent/JPH0114013B2/ja
Granted 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
    • B29C48/256—Exchangeable extruder parts
    • B29C48/2564—Screw parts
    • 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
    • B29B7/40—Mixing; Kneading continuous, with mechanical mixing or kneading devices with movable mixing or kneading devices rotary with single shaft
    • B29B7/42—Mixing; Kneading continuous, with mechanical mixing or kneading devices with movable mixing or kneading devices rotary with single shaft with screw or helix
    • B29B7/421—Mixing; Kneading continuous, with mechanical mixing or kneading devices with movable mixing or kneading devices rotary with single shaft with screw or helix with screw and additionally other mixing elements on the same shaft, e.g. paddles, discs, bearings, rotor blades of the Banbury type
    • 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
    • B29C48/62—Screws characterised by the shape of the thread channel, e.g. U-shaped
    • 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
    • B29C48/64—Screws with two or more threads
    • B29C48/66—Barrier threads, i.e. comprising primary and secondary threads whereby the secondary thread provides clearance to the barrel for material movement
    • 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

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Extrusion Moulding Of Plastics Or The Like (AREA)

Description

【発明の詳細な説明】 （産業の利用分野） 本発明は各種の熱可塑性樹脂または熱可塑性樹
脂と充てん剤との複合材料の溶融・混練に適した
押出成形機用単軸スクリユーに関する。DETAILED DESCRIPTION OF THE INVENTION (Field of Industrial Application) The present invention relates to a single screw for an extrusion molding machine suitable for melting and kneading various thermoplastic resins or composite materials of thermoplastic resins and fillers.

（従来技術） 押出成形機としては、極力多種類の熱可塑性樹
脂（以下単に樹脂と称する。）または樹脂と充て
ん剤との複合材料の物性を損なうことなく、均一
に溶融・混練して押出すことができる汎用性があ
り、しかも安価で高能力であることが要求され
る。このためには、スクリユー形状が重要な役目
を有し、従来、各種のスクリユーが実用に供され
ている。(Prior art) An extrusion molding machine is used to uniformly melt, knead, and extrude as many types of thermoplastic resins (hereinafter simply referred to as resins) or composite materials of resin and fillers without impairing their physical properties. It is required to be versatile, inexpensive, and highly capable. For this purpose, the shape of the screw plays an important role, and various types of screws have been put into practical use.

以下に、従来例について説明する。 A conventional example will be explained below.

第４図は、最も一般的なスクリユーを示す。１
条のフルフライト形スクリユー１は、供給部Ａ、
圧縮部Ｂおよび計量部Ｃからなつている、このス
クリユー１は、構造が単純であり、設計、加工上
のコストが安価のために多用されている。しか
し、圧縮部Ｂでの溶融能力に限界があり、押出量
の増大には大径のスクリユー１を採用して所望の
押出量を確保しなければならず、装置全体が大形
となつて装置コストがかさむ欠点がある。 Figure 4 shows the most common screw. 1
The full-flight type screw 1 has a supply section A,
This screw 1, consisting of a compression section B and a metering section C, has a simple structure and is often used because of its low design and processing costs. However, there is a limit to the melting capacity in the compression section B, and in order to increase the extrusion rate, a large-diameter screw 1 must be used to secure the desired extrusion rate, which increases the overall size of the device. The disadvantage is that it is costly.

第５図は、バリア形スクリユーを示す。１条フ
ルフライト形スクリユーの溶融・混練能力不足を
改善するために、計量部Ｃの一部分にバリア部Ｅ
を設けてあり、米国特許第3486192号に開示され
ている。このバリア形スクリユー２は、バリア部
Ｅにおいて樹脂の固体分と融体分（以下単に固体
分、融体分と称する。）との分離作用を行わせる
とともに局所せん断効果が得られるようにしたも
のである。しかし、スクリユー２の回転数を増大
させて高能力押出しをすると、バリア部Ｅに大量
の固体分が充満して、高能力押出しの効果が十分
には得られず、結局押出量の増大に制限を受け
る。また、成形の対象となる成形材料（樹脂や樹
脂と充てん剤との複合材料）を変更すると、その
材料物性に合つたバリア部Ｅへの変更を要し、個
別にスクリユー２を製作しなければならず、この
ようなフライト部と不連続なバリア部Ｅを有する
スクリユー２の製作費は割高となるなどの欠点が
ある。 FIG. 5 shows a barrier type screw. In order to improve the lack of melting and kneading ability of the single-thread full-flight type screw, a barrier section E is installed in a portion of the measuring section C.
is disclosed in U.S. Pat. No. 3,486,192. This barrier type screw 2 is designed to perform a separation action between the solid content and the molten content (hereinafter simply referred to as the solid content and molten content) of the resin in the barrier portion E, and also to obtain a local shearing effect. It is. However, when the rotational speed of the screw 2 is increased to perform high-capacity extrusion, the barrier section E is filled with a large amount of solids, making it impossible to obtain the full effect of high-capacity extrusion, which ultimately limits the increase in the extrusion amount. receive. Additionally, if the molding material (resin or composite material of resin and filler) used for molding is changed, it is necessary to change the barrier part E to match the physical properties of the material, and the screw 2 must be manufactured separately. However, there is a drawback that the manufacturing cost of the screw 2 having such a barrier portion E that is discontinuous with the flight portion is relatively high.

第６図は、バリアフライト形スクリユー３を示
す。１条フルフライト形スクリユーの圧縮部Ｂに
固体分と融体分とを分離するバリアフライト部Ｆ
を設けてあり、特公昭42−11505号に開示されて
いる。このバリアフライト形スクリユー３は、ス
クリユー３の回転数を増大させて高能力押出しを
するとバリアフライト部Ｆに固体分が充満し、大
量の固体分がバリアフライト部Ｆでせき止められ
て計量部Ｃ側に移送されず、融体分のみが押出さ
れる。すなわち、押出量がバリアフライト部Ｆに
おける溶融能力にて直接的に規制され、バリアフ
ライト部Ｆの溶融能力以上には押出量を増大させ
ることができない。また、前述のバリア形スクリ
ユー２と同様に、成形の対象となる成形材料を変
更するには、バリアフライト部Ｆの変更を伴な
い、個別にスクリユー３を製作することを要す
る。 FIG. 6 shows a barrier flight type screw 3. Barrier flight part F that separates solid content and molten content is in compression part B of the single-thread full-flight type screw.
has been established and is disclosed in Japanese Patent Publication No. 11505/1973. In this barrier flight type screw 3, when the rotation speed of the screw 3 is increased to perform high-capacity extrusion, the barrier flight part F is filled with solids, and a large amount of solids is dammed up in the barrier flight part F and is placed on the measuring part C side. Only the melt is extruded. That is, the extrusion rate is directly regulated by the melting capacity of the barrier flight section F, and the extrusion rate cannot be increased beyond the melting capacity of the barrier flight section F. Further, like the barrier type screw 2 described above, in order to change the molding material to be molded, it is necessary to change the barrier flight part F and manufacture the screw 3 individually.

第７図は、更に他の従来例を示す。この多条フ
ライト形スクリユー４は、第１多条フライト部Ｇ
と、この各フライトに接続させて順方向に形成さ
れた第２多条フライト部Ｈと、これと逆方向に形
成されて接続する第３多条フライト部Ｉと、先端
部の１条フライトからなる計量部Ｃとからなつて
おり、高能力押出しが可能なスクリユーとして特
開昭57−169337号に開示されている。しかし、こ
の多条フライト形スクリユー４は、多条フライト
部Ｈ，Ｉが形成する溝形流路の溝深さが比較的浅
いために、スクリユー４の回転数が増大させる
と、溶融・混練能力が過大となつて、特に高粘度
の成形材料を押出す場合には吐出温度が高くなり
すぎる傾向がある。また、前述の従来例と同様に
成形の対象となる成形材料の変更には、第２多条
フライト部Ｈと第３多条フライト部Ｉとの配分比
を適正に設定した個別のスクリユー４を準備する
必要がある。 FIG. 7 shows yet another conventional example. This multi-flight type screw 4 has a first multi-thread flight portion G.
, a second multi-striped flight section H formed in the forward direction and connected to each flight, a third multi-striped flight section I formed in the opposite direction and connected to this, and a single-striped flight at the tip. It is disclosed in JP-A-57-169337 as a screw capable of high-capacity extrusion. However, in this multi-flight type screw 4, since the groove depth of the groove-shaped channel formed by the multi-flight parts H and I is relatively shallow, when the rotational speed of the screw 4 increases, the melting and kneading capacity increases. becomes excessive, and the extrusion temperature tends to become too high, especially when extruding a highly viscous molding material. Further, as in the conventional example described above, to change the molding material to be molded, an individual screw 4 with an appropriate distribution ratio between the second multi-flight part H and the third multi-flight part I is used. You need to prepare.

更に、他の従来スクリユーとして、１条フルフ
ライト形スクリユー１（第４図参照）の供給部Ａ
と計量部Ｃとの中間に多条フライトを有するロー
タ部を設け、該位置に相当するシリンダー（図
外）の内面に円弧状多条ねじ部を設け、断面形状
が多角形に類似したスクリユーとシリンダーとの
組み合せ構造になる押出成形機が特公昭38−
20979号に開示されている。しかし、このスクリ
ユーも先に述べたごとく、各種の成形材料の溶
融・混練には、その対応性を欠き、コスト面にお
いて不利である。このスクリユーは、特定の樹脂
材料専用に設計・製作されたものであつて、一本
のスクリユーで数種類の樹脂や樹脂と充てん剤と
の複合材料の押出しを行うことに本来無理があ
る。 Furthermore, as another conventional screw, the supply section A of the single-thread full-flight screw 1 (see Fig. 4)
A rotor part having a multi-thread flight is provided between the C and the measuring part C, and an arc-shaped multi-thread thread part is provided on the inner surface of a cylinder (not shown) corresponding to this position, and a screw with a cross-sectional shape similar to a polygon is provided. An extrusion molding machine with a combination structure with a cylinder was developed in 1978.
No. 20979. However, as mentioned above, this screw is not suitable for melting and kneading various molding materials, and is disadvantageous in terms of cost. This screw is designed and manufactured exclusively for a specific resin material, and it is inherently impossible to extrude several types of resins or composite materials of resin and filler with one screw.

以上の説明によつて理解されるごとく、従来の
押出成形機用単軸スクリユーには各種の成形材料
への汎用性がなく、一本のスクリユーで各種の成
形材料を溶融・混練できるスクリユーが待望され
ていた。 As can be understood from the above explanation, conventional single-screw screws for extrusion molding machines are not versatile enough to handle various molding materials, and a screw that can melt and knead various molding materials with a single screw is long-awaited. It had been.

（発明の目的） 本発明は、従来の押出成形機用単軸スクリユー
における上記のごとき問題点を解決するためにな
されたものであり、スクリユー軸に少なくとも、
供給部、溶融部、混合部、および計量部として作
用するそれぞれ別体のスクリユー要素を外ばめさ
せてスクリユーを一体的に構成し、かつ容易にス
クリユー要素を交換して種々の樹脂や樹脂と充て
ん剤との複合材料、すなわち成形材料に応じて良
好に溶融・混練でき、かつ高能力押出しを可能と
する押出成形機用単軸スクリユーを提供すること
を目的としている。(Object of the Invention) The present invention was made to solve the above-mentioned problems in the conventional single-screw for extrusion molding machines.
Separate screw elements that act as a supply section, a melting section, a mixing section, and a metering section are fitted externally to form an integral screw, and the screw elements can be easily exchanged to handle various resins and resins. The object of the present invention is to provide a single screw for an extrusion molding machine that can be melted and kneaded well depending on a composite material with a filler, that is, a molding material, and enables high-capacity extrusion.

（実施例） 本発明に係る実施例を第１図〜３図に基づいて
説明する。(Example) An example according to the present invention will be described based on FIGS. 1 to 3.

第１図に示す実施例のスクリユー５は、スクリ
ユー軸６とスクリユー軸６にその基端部より順次
に外ばめさせてスクリユーの供給部Ｊを構成する
スクリユー要素７，８、溶融部Ｋを構成するスク
リユー要素９，１０、混合部Ｌを構成するスクリ
ユー要素１１，１２、およびスクリユー軸６の先
端部の小径のねじ部にねじ込んで取り着けて計量
部Ｍを構成するスクリユー要素１３とより構成さ
れている。そして第２図に示すごとく、スクリユ
ー軸６の主幹部の断面形状は八角形であり、各ス
クリユー要素７，８，９，１０，１１，１２の内
孔も適合する八角形に形成してスクリユー軸６の
主幹部に外ばめさせてある。はめ合い面を八角形
とするのは、４条フライトが等間隔配置であるの
で各スクリユー要素７，８，９，１０，１１，１
２を任意の位置としてスクリユー軸６上に設置し
うるためであり、必ずしも八角形に限定するもの
ではなく二面巾を含む多角形であればよい。 The screw 5 of the embodiment shown in FIG. 1 has a screw shaft 6, screw elements 7, 8, and a melting section K that are fitted onto the screw shaft 6 sequentially from the base end to form a supply section J of the screw. Consisting of screw elements 9 and 10, screw elements 11 and 12 that constitute the mixing part L, and screw element 13 that is screwed into the small diameter threaded part at the tip of the screw shaft 6 and constitutes the measuring part M. has been done. As shown in FIG. 2, the cross-sectional shape of the main body of the screw shaft 6 is octagonal, and the inner holes of each screw element 7, 8, 9, 10, 11, and 12 are also formed in an octagonal shape to fit the screw shaft 6. It is externally fitted onto the main body of the shaft 6. The reason why the fitting surface is octagonal is because the four flights are arranged at equal intervals, so each screw element 7, 8, 9, 10, 11, 1
2 can be installed on the screw shaft 6 at any desired position, and is not necessarily limited to an octagonal shape, but may be any polygonal shape including the width across flats.

主として固体分を移送しながら加熱するスクリ
ユーの供給部Ｊを構成するスクリユー要素７，８
には等間隔の４条フライトが形成され、その各溝
形流路の溝深さは一定であり、スクリユー６の外
径の６％〜12％に選定される。 Screw elements 7 and 8 that constitute the supply section J of the screw that mainly heats solids while transferring them
Four flights are formed at equal intervals, and the groove depth of each groove-shaped channel is constant and is selected to be 6% to 12% of the outer diameter of the screw 6.

樹脂の溶融・混練を行う溶融部Ｋを構成するス
クリユー要素９，１０には等間隔の４条フライト
が形成され、その各溝形流路の溝深さは一定では
なく、深溝部分と浅溝部分とが一定の周期で繰返
されており、しかもその周期的な変化の位相は、
一つの溝形流路の位相と隣り合う溝形流路の位相
とでは90゜ずれている。 Four equally spaced flights are formed in the screw elements 9 and 10 constituting the melting zone K that melts and kneads the resin, and the groove depth of each groove-shaped channel is not constant, and there are deep grooves and shallow grooves. part is repeated at a constant period, and the phase of the periodic change is
The phase of one groove-shaped flow path and the phase of an adjacent groove-shaped flow path are shifted by 90 degrees.

すなわち、第３図に示すごとく、４条フライト
間に形成される４個の溝形流路９1又は１０1，９
２又は１０2，９3又は１０3，９4又は１０4は、そ
れぞれ深溝部分d0と浅溝部分d1が１ピツチごとに
繰返して形成され、かつ各深溝部分d0と各浅溝部
分d1とは相互に位相が90゜相違している。 That is, as shown in FIG. 3, four groove-shaped channels 9 1 or 10 1 , 9 formed between the four flights
2 or 10 2 , 9 3 or 10 3 , 9 4 or 10 4 is formed by repeatedly forming a deep groove portion d 0 and a shallow groove portion d 1 for each pitch, and each deep groove portion d 0 and each shallow groove portion The phase is different from d 1 by 90°.

融体分の混合・均質化を行う混合部Ｌを構成す
るスクリユー要素１１，１２には等間隔の４条フ
ライトが形成され、その各溝形流路の溝深さは一
定であるが、スクリユー要素１１の４条フライト
の始端は、スクリユー要素１０の４条フライトが
形成する溝形流路の中心の延長線上に位置し、ま
たその終端は、スクリユー要素１２の４条フライ
トが形成する溝形流路の中心の延長線上に位置し
ている。 Four equally spaced flights are formed in the screw elements 11 and 12 constituting the mixing section L that mixes and homogenizes the melt, and the groove depth of each groove-shaped flow path is constant. The starting end of the four-flight flight of the screw element 11 is located on an extension of the center of the groove-shaped channel formed by the four-flight flight of the screw element 10, and the end thereof is located on the central extension of the groove-shaped flow path formed by the four-flight flight of the screw element 12. It is located on an extension of the center of the channel.

従つて、上流から移送されてくる融体分をそれ
ぞれ二分割して別個の溝形流路へと送り込む。か
かる構成は、スクリユー１１，１２をそれぞれス
クリユー軸６の円周方向に45゜ずらせて外ばめす
ればよい。 Therefore, the molten material transferred from upstream is divided into two parts and sent to separate groove-shaped channels. Such a configuration can be achieved by fitting the screws 11 and 12 outwardly by shifting the screws 11 and 12 by 45 degrees in the circumferential direction of the screw shaft 6, respectively.

融体分を最終的に均質化させて一定の押出量で
押出す計量部Ｍを構成するスクリユー要素１３に
は１条フライトが形成されている。 A single flight is formed in the screw element 13 constituting the measuring section M that ultimately homogenizes the melt and extrudes it at a constant extrusion rate.

次に作用について説明する。図外の所定のシリ
ンダー内にスクリユー５を組み込んで回転駆動さ
せ、樹脂または樹脂と充てん剤との複合材料等の
成形材料をシリンダー内に供給すると、成形材料
はスクリユー要素７によりスクリユー先端側に移
送される。スクリユー要素８内では、樹脂はシリ
ンダーからの伝熱によつて加熱されるとともに、
スクリユー５の回転に伴なつて多条フライトによ
る強いせん断力が樹脂に作用して樹脂を加熱し、
固形の樹脂は速やかに互に密着して樹脂間の境界
が消滅したうず巻き状に融体分と半溶融の固体分
や充てん剤が混練された固体相を形成する。この
ように溶融を開始した樹脂を含む成形材料は、次
の溶融部Ｋに進み、多条フライトが形成する溝形
流路の深溝部分d0と浅溝部分d1とが周期的に変化
するスクリユー要素９内において、圧縮・開放作
用を周期的に受けて更に溶融・混練される。特に
浅溝部分d1を樹脂が通過する際には、一時的に強
いせん断作用を受けるので粘性発熱による溶融化
と強いせん断作用により混練される。そして、次
の深溝部分d0では、温度上昇した融体分と比較的
温度の低い固体分（樹脂及び充てん剤）とが混
練、混合されるので融体分は過度に温度上昇する
ことはなく、融体分からの伝熱により固体分（樹
脂）は効率良く加熱されて溶融化していく。かか
るパターンはスクリユー要素９内にて周期的に何
回も繰り返されるので各溝形流路中の樹脂は効率
良く温度上昇を抑制されつつ溶融化し、かつ充て
ん剤と混練される。スクリユー要素９を通過する
間に溶融を完了しない樹脂は、更に付加された同
様のスクリユー要素１０により溶融・混練され
る。このように成形材料の種類に応じて、スクリ
ユー要素１０を追加、若しくは除去して溶融部Ｋ
の長さを調節して樹脂の溶融・混練度合を調整で
きる。また溶融部Ｋを構成するスクリユー要素９
の溝形流路の溝深さの変化の位相は、隣り合う溝
形流路間では90゜ずれた周期性を有しているので、
スクリユー要素９の軸に直角な断面における溝形
流路の面積はほぼ同一である。従つて、溶融部Ｋ
におけるスクリユー９の一回転当りの成形材料の
移送量は常にほぼ同一となり、供給部Ｊにおける
成形材料の移送量に合せて平均溝深さを設定すれ
ば過度に樹脂を圧縮させたり、過度に温度上昇を
させることなく、樹脂をほぼ完全に溶融・混練で
きる。 Next, the effect will be explained. When a screw 5 is installed in a predetermined cylinder (not shown) and driven to rotate, and a molding material such as a resin or a composite material of resin and filler is supplied into the cylinder, the molding material is transferred to the screw tip side by the screw element 7. be done. In the screw element 8, the resin is heated by heat transfer from the cylinder and
As the screw 5 rotates, a strong shearing force from the multi-flight acts on the resin, heating it.
The solid resins quickly adhere to each other to form a solid phase in which the molten component, semi-molten solid component, and filler are kneaded in a spiral shape in which the boundaries between the resins disappear. The molding material containing the resin that has started melting in this way advances to the next melting zone K, and the deep groove portion d 0 and shallow groove portion d 1 of the groove-shaped channel formed by the multi-flights change periodically. Inside the screw element 9, the material is periodically compressed and released to further melt and knead. In particular, when the resin passes through the shallow groove portion d1 , it is temporarily subjected to a strong shearing action, so that it is melted by viscous heat generation and kneaded by the strong shearing action. Then, in the next deep groove part d 0 , the molten material whose temperature has increased and the solid components (resin and filler) whose temperature is relatively low are kneaded and mixed, so the temperature of the molten material does not rise excessively. The solid component (resin) is efficiently heated and melted by heat transfer from the molten component. Since such a pattern is periodically repeated many times within the screw element 9, the resin in each groove-shaped channel is efficiently melted while suppressing the temperature rise, and is kneaded with the filler. The resin that does not complete melting while passing through the screw element 9 is further melted and kneaded by a similar screw element 10 added. In this way, depending on the type of molding material, the screw element 10 may be added or removed to form the molten zone K.
By adjusting the length of the resin, the degree of melting and kneading of the resin can be adjusted. Also, the screw element 9 constituting the melting part K
Since the phase of the change in the groove depth of the groove-shaped channels has a periodicity that is shifted by 90° between adjacent groove-shaped channels,
The areas of the channels in the section perpendicular to the axis of the screw element 9 are approximately the same. Therefore, the melting zone K
The amount of molding material transferred per revolution of the screw 9 is always almost the same, and if the average groove depth is set according to the amount of molding material transferred in the supply section J, it will not be possible to excessively compress the resin or cause excessive temperature rise. The resin can be melted and kneaded almost completely without raising the temperature.

溶融部Ｋにおいて、ほぼ完全に溶融・混練され
た成形材料は混合部Ｌを形成するスクリユー要素
１１の多条フライトにより二分割され、スクリユ
ー要素１０の他の溝形流路を通過してきた成形材
料と混合される。更に成形材料はスクリユー要素
１２により再度二分割されて混合作用を受ける。
このように成形材料は、スクリユー要素１１，１
２によつて二分割されながら均質に混合される。
この混合度合は、スクリユー要素１１，１２の数
に比例するので樹脂の種類や充てん剤の種類や割
合によつて二分割し得るスクリユー要素の個数を
増減させて容易に制御できる。またスクリユー要
素１１，１２のフライト数を多くすれば更に混合
作用を高めることができる。 In the melting zone K, the molding material that has been almost completely melted and kneaded is divided into two by the multiple flights of the screw element 11 forming the mixing zone L, and the molding material that has passed through the other groove-shaped flow path of the screw element 10 mixed with. Furthermore, the molding material is again divided into two parts by the screw element 12 and subjected to a mixing action.
In this way, the molding material is applied to the screw elements 11,1
The mixture is divided into two by 2 and mixed homogeneously.
The degree of mixing is proportional to the number of screw elements 11 and 12, and therefore can be easily controlled by increasing or decreasing the number of screw elements that can be divided into two parts depending on the type and proportion of the resin and filler. Further, by increasing the number of flights of the screw elements 11 and 12, the mixing effect can be further enhanced.

次に、混合部Ｌで均質化された成形材料は、計
量部Ｍを構成する１条フライトから成るスクリユ
ー要素１３により、最終的に一定量で押出され
る。 Next, the molding material homogenized in the mixing section L is finally extruded in a constant amount by a screw element 13 consisting of a single flight forming a measuring section M.

（発明の構成） 本願発明になる押出成形機用単軸スクリユー
は、押出成形機用単軸スクリユーにおいて、先端
部にねじ部が形成され、多角形断面の主幹部を有
するスクリユー軸に、順方向に形成された多条フ
ライトを有する複数個のスクリユー要素を外ばめ
させ、かつ各スクリユー要素が、スクリユー軸の
基端部より順次に、フライトが一定深さの溝流路
を形成するスクリユー要素、フライトが浅溝流路
と深溝流路とを周期的に変化して形成し、その周
期の位相が隣り合う溝流路間で90゜ずれたスクリ
ユー要素、フライトの始端と終端が前後のスクリ
ユー要素のフライトと非連続のスクリユー要素お
よびスクリユー軸のねじ部にねじ込んで取り着け
るスクリユー要素とからなつている。(Structure of the Invention) A single screw for an extrusion molding machine according to the present invention is a single screw for an extrusion molding machine, in which a threaded portion is formed at the tip, and a screw shaft having a main body with a polygonal cross section is attached in a forward direction. A screw element in which a plurality of screw elements each having a multi-threaded flight are fitted outwardly, and the flights of each screw element sequentially form a groove channel of a constant depth from the base end of the screw shaft. , a screw element in which flights are formed by periodically changing shallow groove channels and deep groove channels, and the phase of the period is shifted by 90 degrees between adjacent groove channels; It consists of a flight of elements, a discontinuous screw element, and a screw element that is screwed into the threaded part of the screw shaft.

（発明の効果） 本発明になる押出成形機用単軸スクリユーは上
記のように構成されているので、スクリユー軸に
外ばめする多条フライトを有する複数個のスクリ
ユー要素の組合せを、種々の樹脂または樹脂と充
てん剤との複合材料の物性に応じて最良の溶融・
混練状態にて高能力押出しがなされるように容易
に選定することができ、多数のスクリユー軸を準
備することなく、比較的形状の簡単なスクリユー
要素を準備することによつて一本のスクリユー軸
にスクリユー要素を交換して使用できるので、安
価にして汎用性の高い押出成形機用単軸スクリユ
ーを提供できた。(Effects of the Invention) Since the single screw for an extrusion molding machine according to the present invention is constructed as described above, various combinations of a plurality of screw elements having multi-flights that are externally fitted onto the screw shaft can be used. Depending on the physical properties of the resin or composite material of resin and filler,
It can be easily selected so that high-capacity extrusion can be performed in the kneaded state, and a single screw shaft can be used by preparing a screw element with a relatively simple shape without preparing a large number of screw shafts. Since the screw element can be replaced and used, it is possible to provide an inexpensive and highly versatile single-screw screw for extrusion molding machines.

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

第１図は、本発明に係る押出成形機用単軸スク
リユーの側面図、第２図は、第１図の−線断
面図、第３図は、本発明に係る押出成形機用単軸
スクリユーの溶融部の溝形流路の配列及び位相の
ずれを示す断面図、第４図は、１条フルフライト
形スクリユーの側面図、第５図は、バリア形スク
リユーの側面図、第６図はバリアフライト形スク
リユーの側面図、第７図は多条フライト形スクリ
ユーの側面図である。 ５：スクリユー、６：スクリユー軸、７，８：
供給部のスクリユー要素、９，１０：溶融部のス
クリユー要素、１１，１２：混合部のスクリユー
要素、１３：計量部のスクリユー要素、Ｊ：供給
部、Ｋ：溶融部、Ｌ：混合部、Ｍ：計量部、d0：
深溝部、d1：浅溝部。 FIG. 1 is a side view of a single screw for an extrusion molding machine according to the present invention, FIG. 2 is a sectional view taken along the line -- in FIG. 1, and FIG. 4 is a side view of a single full-flight screw, FIG. 5 is a side view of a barrier type screw, and FIG. 6 is a side view of a barrier type screw. FIG. 7 is a side view of the barrier flight type screw. FIG. 7 is a side view of the multi-flight type screw. 5: Screw, 6: Screw axis, 7, 8:
Screw element of supply section, 9, 10: Screw element of melting section, 11, 12: Screw element of mixing section, 13: Screw element of measuring section, J: Supply section, K: Melting section, L: Mixing section, M : Measuring part, d 0 :
Deep groove part, d1 : Shallow groove part.

Claims (1)

【特許請求の範囲】[Claims] １ 押出成形機用単軸スクリユーにおいて、先端
部にねじ部が形成され、多角形断面の主幹部を有
するスクリユー軸に、順方向に形成された多条フ
ライトを有する複数個のスクリユー要素を外ばめ
させ、かつ各スクリユー要素が、スクリユー軸の
基端部より順次に、フライトが一定深さの溝流路
を形成するスクリユー要素、フライトが浅溝流路
と深溝流路とを周期的に変化して形成し、その周
期の位相が隣り合う溝流路間で90゜ずれたスクリ
ユー要素、フライトの始端と終端が前後のスクリ
ユー要素のフライトと非連続のスクリユー要素お
よびスクリユー軸のねじ部にねじ込んで取り着け
るスクリユー要素とからなることを特徴とする押
出成形機用単軸スクリユー。1. In a single screw for an extrusion molding machine, a plurality of screw elements having multiple flights formed in the forward direction are attached to a screw shaft having a threaded portion formed at the tip and a main body having a polygonal cross section. A screw element in which the flights form a groove channel with a constant depth, and the flights periodically change between a shallow groove channel and a deep groove channel. A screw element whose periodic phase is shifted by 90° between adjacent groove channels, a screw element whose flight start and end are discontinuous with the flights of the front and rear screw elements, and a screw element screwed into the threaded part of the screw shaft. A single screw for an extrusion molding machine, characterized in that it consists of a screw element that can be attached with.
JP59101847A 1984-05-22 1984-05-22 Single shaft screw for extrusion molding machine Granted JPS60245537A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP59101847A JPS60245537A (en) 1984-05-22 1984-05-22 Single shaft screw for extrusion molding machine

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP59101847A JPS60245537A (en) 1984-05-22 1984-05-22 Single shaft screw for extrusion molding machine

Publications (2)

Publication Number Publication Date
JPS60245537A JPS60245537A (en) 1985-12-05
JPH0114013B2 true JPH0114013B2 (en) 1989-03-09

Family

ID=14311442

Family Applications (1)

Application Number Title Priority Date Filing Date
JP59101847A Granted JPS60245537A (en) 1984-05-22 1984-05-22 Single shaft screw for extrusion molding machine

Country Status (1)

Country Link
JP (1) JPS60245537A (en)

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS6440506U (en) * 1987-09-01 1989-03-10
JP2591893Y2 (en) * 1990-11-19 1999-03-10 三菱重工業株式会社 Pressure adjusting device for twin screw extruder
DE102015005790A1 (en) * 2015-05-10 2016-11-10 Reifenhäuser GmbH & Co. KG Maschinenfabrik Screw for use in an extruder, method for converting a screw and extruder
CN110901016B (en) * 2019-11-04 2021-09-03 大维塑料技术(南京)有限公司 Screw rod of plastic extruding machine

Also Published As

Publication number Publication date
JPS60245537A (en) 1985-12-05

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