JPH061792Y2 - Extruder screw - Google Patents

Extruder screw

Info

Publication number
JPH061792Y2
JPH061792Y2 JP1988167642U JP16764288U JPH061792Y2 JP H061792 Y2 JPH061792 Y2 JP H061792Y2 JP 1988167642 U JP1988167642 U JP 1988167642U JP 16764288 U JP16764288 U JP 16764288U JP H061792 Y2 JPH061792 Y2 JP H061792Y2
Authority
JP
Japan
Prior art keywords
pin
screw
pins
extruder
tip
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 - Lifetime
Application number
JP1988167642U
Other languages
Japanese (ja)
Other versions
JPH0288726U (en
Inventor
宏文 佐川
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 JP1988167642U priority Critical patent/JPH061792Y2/en
Publication of JPH0288726U publication Critical patent/JPH0288726U/ja
Application granted granted Critical
Publication of JPH061792Y2 publication Critical patent/JPH061792Y2/en
Anticipated expiration legal-status Critical
Expired - Lifetime 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
    • B29C48/50—Details of extruders
    • B29C48/505—Screws
    • B29C48/565—Screws having projections other than the thread, 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
    • B29C48/36—Means for plasticising or homogenising the moulding material or forcing it through the nozzle or die
    • B29C48/50—Details of extruders
    • B29C48/505—Screws
    • B29C48/56—Screws having grooves or cavities other than the thread or the channel

Landscapes

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

Description

【考案の詳細な説明】 (イ)産業上の利用分野 本考案は、押出機用スクリューに関するものである。[Detailed Description of the Invention] (a) Field of Industrial Application The present invention relates to a screw for an extruder.

(ロ)従来の技術 従来の押出機用スクリューとして、特開昭６２−２９０
５１４号公報に示されるものがある。これに示される押
出機用スクリューは、整列して固定された複数の円柱状
のピンを有しており、これらのピンには材料を通すため
の傾斜穴が設けられている。半数のピンの傾斜穴はスク
リューみぞ底側からシリンダ壁面側へ材料を流すように
傾斜しており、残りの半数のピンはシリンダ壁面側から
スクリューみぞ底側へ材料を流すように傾斜している。
材料がスクリューに設けられたピンの列を通過する際、
ピンに設けられた傾斜穴によって、スクリューみぞ底側
の材料はシリンダ壁面側へ移動し、また逆にシリンダ壁
面側の材料はスクリューみぞ底側へ移動する。これによ
り、材料の十分な混合を行なうことができ、樹脂の温度
を均一化することができる。(B) Prior art As a conventional screw for an extruder, as disclosed in JP-A-62-290
There is one disclosed in Japanese Patent No. 514. The extruder screw shown therein has a plurality of cylindrical pins that are aligned and fixed, and these pins are provided with inclined holes for passing the material. Half of the pins have inclined holes so that the material flows from the screw groove bottom side to the cylinder wall surface side, and the other half of the pins are inclined so that the material flows from the cylinder wall surface side to the screw groove bottom side. .
As the material passes through the row of pins on the screw,
Due to the inclined hole provided in the pin, the material on the screw groove bottom side moves to the cylinder wall surface side, and conversely, the material on the cylinder wall surface side moves to the screw groove bottom side. As a result, the materials can be sufficiently mixed and the temperature of the resin can be made uniform.

(ハ)考案が解決しようとする課題 しかしながら、上記のようなピンを、小径のスクリュー
に適用した場合には、所望どおりの混合効果を得ること
ができないという問題点がある。すなわち、スクリュー
軸方向に直交する断面で見た場合、スクリューに固定さ
れたピンはスクリュー中心から放射方向に突出する状態
となるが、ピンとピンの間のすきまは、スクリューみぞ
底側（ピンの根元側）が小さく、ピンの先端に行くほど
大きくなる。この傾向はスクリュー径が小さいほど大き
くなる。このため、ピンの根元側の配置間隔をできるだ
け小さくしても、ピンの先端側では大きい断面積の通路
が形成される。この結果、ピンの傾斜穴を通過する樹脂
がピンの外側を通る樹脂と比較して相対的に少なくな
り、十分な混合効果を得ることができない。本考案は、
このような課題を解決することを目的としている。(C) Problem to be Solved by the Invention However, when the above-mentioned pin is applied to a screw having a small diameter, there is a problem that a desired mixing effect cannot be obtained. That is, when seen in a cross section orthogonal to the screw axial direction, the pin fixed to the screw is in a state of protruding radially from the screw center, but the clearance between the pins is the bottom of the screw groove (the root of the screw). Side) is small and becomes larger toward the tip of the pin. This tendency increases as the screw diameter decreases. For this reason, even if the arrangement interval on the base side of the pin is made as small as possible, a passage having a large cross-sectional area is formed on the tip side of the pin. As a result, the amount of resin passing through the inclined hole of the pin is relatively smaller than that of the resin passing outside the pin, and a sufficient mixing effect cannot be obtained. The invention is
The purpose is to solve such problems.

(ニ)課題を解決するための手段 本考案は、ピンの形状を先端側ほど大径の逆円すい台状
とすることにより、上記課題を解決する。すなわち、本
考案は、スクリュー本体（１０）の外周部に複数のピン
（１２）がピンの軸心をスクリュー本体半径方向に向け
て固定されており、これらのピンにはピンの一方の側面
から他方の側面に斜めに貫通する傾斜穴（１６）が設け
られており、傾斜穴はおよそ半数のピンではピン根元側
からピン先端側へ材料を流すように傾斜しており、残り
のおよそ半数のピンではピン先端側からピン根元側へ材
料を流すように傾斜している押出機用スクリューを対象
としたものであり、ピンは、根元側が小径であり先端側
が大径の逆円すい台状の形状をしていることを特徴とし
ている。(D) Means for Solving the Problems The present invention solves the above problems by forming the pin into an inverted truncated cone shape having a larger diameter toward the tip. That is, according to the present invention, a plurality of pins (12) are fixed to the outer peripheral portion of the screw body (10) with the axes of the pins oriented in the radial direction of the screw body. An inclined hole (16) penetrating diagonally is provided on the other side surface. The inclined hole is inclined so that the material flows from the pin root side to the pin tip side in about half of the pins, and about half of the remaining holes. The pin is intended for extruder screws that are inclined so that the material flows from the pin tip side to the pin root side.The pin has an inverted truncated cone shape with a small diameter on the base side and a large diameter on the tip side. It is characterized by having.

(ホ)作用 ピンは先端側に行くほど径が大きくなっている。このた
め、シリンダ壁面側においてもピンとピンとの間のすき
まは狭くなっている。これにより、ピンの外部の材料通
路が減少するので、ピンの傾斜穴を通過する材料が増大
する。これにより、混合効果が向上し、材料の温度を均
一化することができ、また顔料を混合した場合には顔料
の分散も良好なものとなる。(E) Action The pin has a diameter that increases toward the tip. Therefore, the clearance between the pins is also narrowed on the cylinder wall surface side. This reduces the material passage outside the pin and thus increases the material that passes through the beveled hole in the pin. As a result, the mixing effect is improved, the temperature of the material can be made uniform, and when the pigments are mixed, the dispersion of the pigment becomes good.

(ヘ)実施例 第１図にスクリューの先端部を示す。スクリュー本体１
０の外周に７２本のピン１２が固着されている。ピン１
２は３本で軸方向に１列を形成するように配置されてお
り、互いに隣接する列は配置ピツチを１／２ずつずらせ
てある。従って、第３図に示すように、スクリュー本体
１０の軸直交断面では３０度ピツチで１２本のピツチ１
２が配置されることになる。なお、第１図では一部のピ
ン１２のみを図示してあるが、上述のようにピン１２は
スクリュー本体１０の全周にわたって配置されている。
ピン１２はスクリュー本体１０の半径方向穴に圧入する
ことにより固定されている。ピン１２は根元部から先端
側に向けてしだいに径が大きくなっている。すなわち、
ピン１２のスクリュー本体１０外周部から露出する部分
は逆円すい台状の形状をしている。この逆円すい台の斜
面の傾角は、第３図に示すように、隣接するピン１２と
の間に平行なすきま１４が形成されるような値としてあ
る。また、各ピン１２には傾斜穴１６が設けられてい
る。傾斜穴１６は同じ軸方向列のピン１２については同
じ向きとなり、互いに隣接する列同志では逆向きとなる
ように配置してある（第２図参照）。また、傾斜穴１６
は第１図に示すように、スクリュー軸心に対して所定の
ねじれ角θを成す向きに配置してある。(F) Example FIG. 1 shows the tip of the screw. Screw body 1
72 pins 12 are fixed to the outer periphery of 0. Pin 1
Two of the two are arranged so as to form one row in the axial direction, and the rows adjacent to each other are arranged by shifting the arrangement pitch by ½. Therefore, as shown in FIG. 3, in the cross section orthogonal to the axis of the screw body 10, 12 pitches 1 at 30 degree pitch.
2 will be placed. Although only some of the pins 12 are shown in FIG. 1, the pins 12 are arranged over the entire circumference of the screw body 10 as described above.
The pin 12 is fixed by being press-fitted into the radial hole of the screw body 10. The diameter of the pin 12 gradually increases from the root portion toward the tip end side. That is,
A portion of the pin 12 exposed from the outer peripheral portion of the screw body 10 has an inverted truncated cone shape. As shown in FIG. 3, the inclination angle of the slope of the inverted conical base is such that a parallel gap 14 is formed between adjacent pins 12. Further, each pin 12 is provided with an inclined hole 16. The inclined holes 16 are arranged so that the pins 12 in the same axial row have the same orientation, and the rows adjacent to each other have the same orientation (see FIG. 2). Also, the inclined hole 16
As shown in FIG. 1, are arranged so as to form a predetermined twist angle θ with respect to the screw axis.

次に、この実施例の動作について説明する。材料は第１
図中左から右へ向って流れる。その際、材料の相当量の
部分がピン１２の傾斜穴１６を通過する。これは、ピン
１２の間には比較的狭いすきま１４しか形成されていな
いため、ピン１２の外側部分に形成される通路が狭くな
っているからである。材料が傾斜穴１６を通過する際、
スクリュー本体１０の表面に近い材料は遠い側に移動さ
れ、逆に遠い側の材料がスクリュー本体１０の表面側に
移送されるため、十分な混合作用を受ける。これによ
り、材料の温度は均一化され、材料に必要以上の熱履歴
を与えることが防止される。また、顔料を使用する場合
には色分散効果が向上する。Next, the operation of this embodiment will be described. Material is first
Flows from left to right in the figure. In doing so, a considerable portion of the material passes through the inclined hole 16 of the pin 12. This is because only a relatively narrow gap 14 is formed between the pins 12, so that the passage formed in the outer portion of the pin 12 is narrow. When the material passes through the inclined hole 16,
The material closer to the surface of the screw body 10 is moved to the far side, and the material on the far side is transferred to the surface side of the screw body 10 on the contrary, so that the material is sufficiently mixed. This makes the temperature of the material uniform and prevents the material from being given an excessive thermal history. Further, when a pigment is used, the color dispersion effect is improved.

(ト)考案の効果 以上説明してきたように、本考案によると、傾斜穴を有
する逆円すい台状のピンをスクリューに整列させて配置
するようにしたので、ピンの傾斜穴以外の部分の通路が
狭くなり、ピンの傾斜穴を通過する材料が増大して混合
効果が増大し、材料の温度をより均一にすることがで
き、また顔料を使用する場合には色分散効果が向上す
る。(G) Effect of the Invention As described above, according to the present invention, the inverted conical trapezoidal pin having the inclined hole is arranged so as to be aligned with the screw. Is narrowed, the material passing through the inclined hole of the pin is increased, the mixing effect is increased, the temperature of the material can be made more uniform, and the color dispersion effect is improved when a pigment is used.

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

第１図は本考案の実施例を示す図、第２図は第１図のII
−II線に沿う断面図、第３図は第１図のIII−III線に沿
う断面図である。 １０…スクリュー本体、１２…ピン、１４…すきま、１
６…傾斜穴。FIG. 1 shows an embodiment of the present invention, and FIG. 2 shows II of FIG.
-II is a sectional view taken along the line, and FIG. 3 is a sectional view taken along the line III-III in FIG. 10 ... Screw body, 12 ... Pin, 14 ... Clearance, 1
6 ... Sloped hole.

Claims (2)

【実用新案登録請求の範囲】[Scope of utility model registration request] 【請求項１】スクリュー本体の外周部に複数のピンがピ
ンの軸心をスクリュー本体半径方向に向けて固定されて
おり、これらのピンにはピンの一方の側面から他方の側
面に斜めに貫通する傾斜穴が設けられており、傾斜穴は
およそ半数のピンではピンの根元側からピンの先端側へ
材料を流すように傾斜しており、残りのおよそ半数のピ
ンではピンの先端側からピンの根元側へ材料を流すよう
に傾斜している押出機用スクリューにおいて、 ピンは、根元側が小径であり先端側が大径である逆円す
い台状の形状をしていることを特徴とする押出機用スク
リュー。1. A plurality of pins are fixed to an outer peripheral portion of a screw main body with the shaft center of the pin directed in a radial direction of the screw main body, and these pins are obliquely penetrated from one side surface of the pin to the other side surface. There is a sloping hole that allows the material to flow from the root side of the pin to the tip side of the pin for approximately half of the pins, and from the tip side of the pin for the remaining approximately half of the pins. In the extruder screw that is inclined so that the material flows to the root side of the extruder, the pin has an inverted truncated cone shape with a small diameter on the root side and a large diameter on the tip side. Screw for. 【請求項２】ピンは、スクリューのフライトが設けられ
ていない部分の全周にわたって配列されている請求項１
記載の押出機用スクリュー。2. The pins are arranged along the entire circumference of a portion of the screw where the flight is not provided.
The extruder screw described.
JP1988167642U 1988-12-27 1988-12-27 Extruder screw Expired - Lifetime JPH061792Y2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP1988167642U JPH061792Y2 (en) 1988-12-27 1988-12-27 Extruder screw

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP1988167642U JPH061792Y2 (en) 1988-12-27 1988-12-27 Extruder screw

Publications (2)

Publication Number Publication Date
JPH0288726U JPH0288726U (en) 1990-07-13
JPH061792Y2 true JPH061792Y2 (en) 1994-01-19

Family

ID=31456122

Family Applications (1)

Application Number Title Priority Date Filing Date
JP1988167642U Expired - Lifetime JPH061792Y2 (en) 1988-12-27 1988-12-27 Extruder screw

Country Status (1)

Country Link
JP (1) JPH061792Y2 (en)

Also Published As

Publication number Publication date
JPH0288726U (en) 1990-07-13

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