JPS6119414B2 - - Google Patents

Info

Publication number
JPS6119414B2
JPS6119414B2 JP53032169A JP3216978A JPS6119414B2 JP S6119414 B2 JPS6119414 B2 JP S6119414B2 JP 53032169 A JP53032169 A JP 53032169A JP 3216978 A JP3216978 A JP 3216978A JP S6119414 B2 JPS6119414 B2 JP S6119414B2
Authority
JP
Japan
Prior art keywords
screw
threaded portion
extrusion
extruder
outer screw
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
JP53032169A
Other languages
Japanese (ja)
Other versions
JPS54124068A (en
Inventor
Hiroshi Sakai
Masatoshi Kanbe
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.)
Toyoda Gosei Co Ltd
Original Assignee
Toyoda Gosei 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 Toyoda Gosei Co Ltd filed Critical Toyoda Gosei Co Ltd
Priority to JP3216978A priority Critical patent/JPS54124068A/en
Publication of JPS54124068A publication Critical patent/JPS54124068A/en
Publication of JPS6119414B2 publication Critical patent/JPS6119414B2/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
    • B29C48/36—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
    • B29C48/395—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
    • 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
    • B29C48/445—Coaxially arranged screws, i.e. one within the other
    • 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
    • B29C48/455—Screws arranged to convey material towards each other, e.g. separate screws arranged after each other and feeding in opposite directions
    • 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
    • B29C48/54—Screws with additional forward-feeding elements
    • 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
    • B29C48/55—Screws having reverse-feeding elements
    • 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
    • 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
    • B29C48/36—Means for plasticising or homogenising the moulding material or forcing it through the nozzle or die
    • B29C48/475—Means for plasticising or homogenising the moulding material or forcing it through the nozzle or die using pistons, accumulators or press rams
    • B29C48/48—Two or more rams or pistons

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】 この発明は、ゴム又はプラスチツクを多層押
出、主として２層押出をする際使用する押出機に
関する。DETAILED DESCRIPTION OF THE INVENTION The present invention relates to an extruder used for multilayer extrusion, mainly two-layer extrusion, of rubber or plastic.

従来、押出機は、第１〜６図に示すように、先
端部に押出ヘツド１Ａ，１Ｂ，１Ｃ、元部に材料
供給口２Ａ，２Ｂ，２Ｃをそれぞれもつ筒形バレ
ル３Ａ，３Ｂ，３Ｃに、１本又は２本のスクリユ
ー４Ａ，４Ｂ，４Ｃ，４Ｄが内装されたものであ
つた。第１〜２図に示すものが主として使用さ
れ、材料の混合、吐出能力が要求される場合に、
第３〜４図及び第５〜６図に示すものが使用され
ていた。 Conventionally, an extruder has a cylindrical barrel 3A, 3B, 3C having extrusion heads 1A, 1B, 1C at the tip and material supply ports 2A, 2B, 2C at the base, respectively, as shown in FIGS. 1 to 6. , one or two screws 4A, 4B, 4C, 4D were installed inside. The ones shown in Figures 1 and 2 are mainly used when mixing and discharging capabilities of materials are required.
Those shown in Figures 3-4 and 5-6 were used.

これらの押出機は、いずれも１種類の材料しか
押出すことができない。このため、多層押出する
場合には、２台以上の押出機が必要であり、か
つ、押出ヘツドの構造が複雑かつ大型となつた。 Each of these extruders can extrude only one type of material. Therefore, in the case of multilayer extrusion, two or more extruders are required, and the structure of the extrusion head becomes complicated and large.

このため二層押出の際、一台の押出機で二層押
出が可能な押出機として第７〜８図に示すよう
に、１個の筒形バレル６の中空部に、ねじ部７ａ
を設けた外スクリユー７及びねじ部８ａを設けた
内スクリユー８をそれぞれ同心円状に配設し、そ
れぞれのスクリユー７及び８で異種の材料をヘツ
ド１８の各流路１９，２０に圧入し、押出ダイ部
２２から二層押出しすることが考えられる（実公
昭45−20783号公報参照）。 For this reason, when performing two-layer extrusion, as shown in FIGS.
An outer screw 7 with a threaded portion 8a and an inner screw 8 with a threaded portion 8a are arranged concentrically, and the screws 7 and 8 force different materials into the channels 19 and 20 of the head 18 and extrude them. It is possible to extrude two layers from the die part 22 (see Japanese Utility Model Publication No. 45-20783).

この際、外スクリユー７への材料供給は、供給
口９から容易にできるが、内スクリユー８への供
給は、内スクリユー８の外筒となる外スクリユー
７が回転しているため、即ち、外スクリユー７に
形成された複数個の連通孔１３Ａを介して内スク
リユー８に材料を供給することは困難である。特
に、ゴムのように帯状の材料を供給する場合は、
図例のようにラム２３で圧入しなければ実施不能
となる。尚、図例中、２５は連続して内スクリユ
ー８に材料を圧送するための逆止弁、２４は外ス
クリユー７の外側に形成された環状溝である。 At this time, the material can be easily supplied to the outer screw 7 from the supply port 9, but the material cannot be supplied to the inner screw 8 because the outer screw 7, which is the outer cylinder of the inner screw 8, is rotating. It is difficult to supply material to the inner screw 8 through the plurality of communication holes 13A formed in the screw 7. Especially when supplying strip-shaped materials such as rubber,
It cannot be carried out unless it is press-fitted with the ram 23 as shown in the figure. In the illustrated example, 25 is a check valve for continuously pumping the material to the inner screw 8, and 24 is an annular groove formed on the outside of the outer screw 7.

この発明は、上記問題点を解消することができ
る押出機を提供することを目的とする。 An object of the present invention is to provide an extruder that can solve the above problems.

この発明の押出機は、１個の筒形バレル内に、
同心円状に外スクリユー及び内スクリユーが配設
され、それぞれのスクリユーのねじ部に連通する
材料流路がヘツド内に形成され、外スクリユーの
外周に隔壁部が形成されるとともに、該隔壁部を
挟んで筒形バレルに各材料供給口が形成され、ま
た、該隔壁部から後方には前方のねじ部とは逆方
向のねじ部が形成され、該ねじ部の後端部に内側
のスクリユーのねじ部の元部に連通する連通孔が
設けられていることを要旨とする。 In the extruder of this invention, in one cylindrical barrel,
An outer screw and an inner screw are arranged concentrically, a material flow path communicating with the threaded portion of each screw is formed in the head, a partition is formed on the outer periphery of the outer screw, and a partition is formed on both sides of the partition. Each material supply port is formed in the cylindrical barrel, and a threaded part in the opposite direction to the front threaded part is formed rearward from the partition wall, and the thread of the inner screw is formed at the rear end of the threaded part. The gist is that a communication hole communicating with the base of the part is provided.

以下、この発明の実施例を図例に基づいて説明
する。 Embodiments of the present invention will be described below based on illustrated examples.

第９〜１０図はこの発明の一実施例を示し、第
９図は押出機の概略断面図、第１０図は外スクリ
ユーの一部の切欠き正面図である。 9 and 10 show an embodiment of the present invention, with FIG. 9 being a schematic sectional view of an extruder, and FIG. 10 being a partially cutaway front view of the outer screw.

筒形バレル６の中空部に、外スクリユー７及び
内スクリユー８が同心円状に配設されている。こ
のとき、外スクリユーの外径は筒形バレル６の中
空部径より、内スクリユー８の外径は外スクリユ
ーの中空部径より、それぞれわずかに小さく形成
されている。 In the hollow part of the cylindrical barrel 6, an outer screw 7 and an inner screw 8 are arranged concentrically. At this time, the outer diameter of the outer screw is slightly smaller than the diameter of the hollow part of the cylindrical barrel 6, and the outer diameter of the inner screw 8 is slightly smaller than the diameter of the hollow part of the outer screw.

筒形バレル６の中間部後方には外層材料供給口
９が設けられ、その後方には内層材料供給口１０
が設けられている。これらの供給口９，１０に
は、それぞれ異種の材料を供給可能なようにホツ
パ（図示せず）が連結される。 An outer layer material supply port 9 is provided at the rear of the intermediate portion of the cylindrical barrel 6, and an inner layer material supply port 10 is provided at the rear thereof.
is provided. Hoppers (not shown) are connected to these supply ports 9 and 10 so that different materials can be supplied, respectively.

外スクリユーは、供給口９，１０間の部位の外
周部に隔壁部１１が形成され、該部より前方が左
ねじ部７ａ、後方途中迄が右ねじ部７ｂとなつて
いる。左ねじ部７ａの先端部内側には段付接合部
１２が形成され、この段付接合部１２には複数個
の環状溝１２ａが設けられている。右ねじ部７ｂ
の後端部には複数個の連通孔１３が設けられてい
る。右ねじ部７ｂよりさらに後方元部は、筒形バ
レル６に回転可能に軸支され、さらに、歯車１
４，１５等を介してモータ等の駆動源（図示せ
ず）と伝動するように連結されている。 The outer screw has a partition wall part 11 formed on the outer periphery of the region between the supply ports 9 and 10, and the part in front of the partition wall part 11 is a left-hand thread part 7a, and the part halfway behind the partition wall part 11 is a right-hand thread part 7b. A stepped joint 12 is formed inside the tip of the left-hand threaded portion 7a, and the stepped joint 12 is provided with a plurality of annular grooves 12a. Right thread part 7b
A plurality of communication holes 13 are provided at the rear end of the holder. The base further back than the right-hand threaded portion 7b is rotatably supported by the cylindrical barrel 6, and is further supported by the gear 1.
4, 15, etc., and is connected to a drive source (not shown) such as a motor so as to transmit power.

内スクリユー８は、外スクリユー７の連通孔１
３の部位から前方は右ねじ部８ａに形成され、後
方元部は外スクリユーに回転可能に軸支され、さ
らに歯車１６，１７等を介してモータ等の駆動源
（図示せず）と伝動するように連結されている。 The inner screw 8 connects to the communication hole 1 of the outer screw 7.
The front part from part 3 is formed with a right-handed threaded part 8a, and the rear part is rotatably supported by an outer screw, and is further transmitted to a drive source (not shown) such as a motor through gears 16, 17, etc. are connected like this.

筒形バレル６の前方先端には、押出ヘツド１８
が取り付けられている。押出ヘツド１８には、外
スクリユーの左ねじ部７ａと連通する外流路１９
と、内スクリユー８の右ねじ部８ａと連通する内
流路２０とが形成され、外流路１９と内流路２０
が先端で合流して押出コア２１と共に押出ダイ部
２２が形成されている。なお、外スクリユー７の
段付接合部１２は、外流路１９と内流路２０との
隔壁１８ａの元部と前記環状溝１２ａでラビリン
ス的なシール効果をもたせて接合されている。 At the front end of the cylindrical barrel 6 is an extrusion head 18.
is installed. The extrusion head 18 has an outer flow path 19 that communicates with the left-hand threaded portion 7a of the outer screw.
, an inner flow path 20 communicating with the right-hand threaded portion 8a of the inner screw 8 is formed, and an outer flow path 19 and an inner flow path 20 are formed.
are joined at the tip to form an extrusion die portion 22 together with an extrusion core 21. The stepped joint portion 12 of the outer screw 7 is joined to the base of the partition wall 18a between the outer flow path 19 and the inner flow path 20 by the annular groove 12a with a labyrinth-like sealing effect.

次に、上記実施例の押出機の使用態様を説明す
る。 Next, how the extruder of the above embodiment is used will be explained.

まず、駆動側から見た回転方向で、外スクリユ
ー７は右回転、内スクリユー８は左回転させる。 First, in the direction of rotation seen from the drive side, the outer screw 7 is rotated clockwise and the inner screw 8 is rotated counterclockwise.

外スクリユーは右回転なので、供給口９から供
給される外層材料は、外スクリユーの左ねじ部７
ａで前方へ移送され押出ヘツド１８の外流路１９
へ圧入される。一方、供給口１０から供給される
内層材料は、外スクリユーの右ねじ部７ｂで後方
（駆動側）へ移送され、複数個の連通孔１３から
内スクリユー８の右ねじ部８ａの元部へ送入され
る。このとき、外スクリユーは右回転で、内スク
リユー８は左回転なので、送入された材料は外ス
クリユー７の中空部内面と内スクリユー８の右ね
じ部８ａで前方へ移送され押出ヘツド１８の内流
路２０へ圧入される。 Since the outer screw rotates clockwise, the outer layer material supplied from the supply port 9 is transferred to the left-hand threaded portion 7 of the outer screw.
a to the outer flow path 19 of the extrusion head 18.
is press-fitted into the On the other hand, the inner layer material supplied from the supply port 10 is transferred to the rear (drive side) by the right-hand threaded portion 7b of the outer screw, and is sent to the base of the right-hand threaded portion 8a of the inner screw 8 through the plurality of communication holes 13. entered. At this time, since the outer screw rotates clockwise and the inner screw 8 rotates counterclockwise, the fed material is transferred forward by the inner surface of the hollow portion of the outer screw 7 and the right-hand threaded portion 8a of the inner screw 8, and is transferred to the inside of the extrusion head 18. It is press-fitted into the flow path 20.

こうして、外流路１９及び内流路２０にそれぞ
れ圧入された異種材料は、押出ダイ部２２で最終
断面形に形成されながら２層押出される。 In this way, the different materials press-fitted into the outer channel 19 and the inner channel 20 are extruded in two layers while being formed into a final cross-sectional shape by the extrusion die section 22.

このとき、外層材料の押出量は外スクリユー７
の回転数で、又、内層材料の押出量は外スクリユ
ー７の中空部内面と、内スクリユー８の外面との
周速の差で、それぞれ制御できる。例えば、外ス
クリユー７と内スクリユー８を同一方向、同一回
転数とすれば内層材料は内スクリユー８の右ねじ
部８ａで前方へ移送されない。従つて、外層材料
と内層材料の押出量の比を自由に選択できる。 At this time, the amount of extrusion of the outer layer material is determined by the outer screw 7.
The amount of extrusion of the inner layer material can be controlled by the difference in circumferential speed between the inner surface of the hollow part of the outer screw 7 and the outer surface of the inner screw 8. For example, if the outer screw 7 and the inner screw 8 are set in the same direction and at the same rotation speed, the inner layer material will not be transferred forward by the right-hand threaded portion 8a of the inner screw 8. Therefore, the ratio of the extrusion amounts of the outer layer material and the inner layer material can be freely selected.

なお、内層材料の押出量を外層材料のものより
多くしたい場合には、少なくとも外スクリユー７
の右ねじ部７ｂの送り能力を左ねじ部７ａのもの
より大きくしておく必要がある。なぜなら、内ス
クリユー８の右ねじ部８ａの送り能力をいくら大
きくしても、連通孔１３から送入される量で内層
材料の最大押出量が決定されるからである。な
お、外スクリユー７の右ねじ部と左ねじ部とを逆
に配置した場合は、内スクリユー８には左ねじ部
を形成する。 In addition, if you want to make the extrusion amount of the inner layer material larger than that of the outer layer material, at least the outer screw 7
It is necessary to make the feeding capacity of the right-hand threaded portion 7b larger than that of the left-hand threaded portion 7a. This is because, no matter how large the feeding capacity of the right-handed threaded portion 8a of the inner screw 8 is, the maximum extrusion amount of the inner layer material is determined by the amount fed through the communication hole 13. Note that when the right-hand threaded portion and the left-hand threaded portion of the outer screw 7 are arranged oppositely, the inner screw 8 is formed with a left-hand threaded portion.

上記実施例においては内層及び外層の二層とし
たものを例に採つたが、ウエザストリツプのよう
にトリム部とリツプ部の二層とすることもダイ形
状を工夫すれば可能である。 In the above-mentioned embodiment, a two-layered material, an inner layer and an outer layer, was used, but it is also possible to create a two-layered material, such as a weather strip, with a trim portion and a lip portion, by modifying the die shape.

この発明の押出機は、上記のような構成なの
で、１個の筒形バレル内に、同心円状に外スクリ
ユー及び内スクリユーが配設され、二層押出可能
とされた押出機において、内スクリユーへの材料
の供給が容易となる。特に、ゴム材料のような、
帯状の材料の内スクリユーへの供給に際して、ラ
ム等の材料圧入機構を必要とせず。押出機が全体
として低コストとなり効果的である。 Since the extruder of the present invention has the above-mentioned configuration, an outer screw and an inner screw are arranged concentrically within one cylindrical barrel, and in an extruder capable of two-layer extrusion, the inner screw is Materials can be easily supplied. Especially, like rubber materials,
There is no need for a material press-in mechanism such as a ram when feeding a strip of material to the inner screw. The extruder as a whole is low cost and effective.

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

第１図は従来の押出機の一実施例を示す概略断
面、第２図は第１図の−線断面図、第３図は
従来の押出機の他の実施例を示す概略断面図、第
４図は第３図の−線断面図、第５図は従来の
押出機のさらに他の実施例を示す概略断面図、第
６図は第５図の−線断面図、第７図は従来の
押出機のさらに他の実施例を示す概略断面図、第
８図は第７図の−線断面図、第９図はこの発
明の押出機の一実施例を示す概略断面図、第１０
図は第９図における外スクリユーの一部切欠正面
図である。 ６…筒形バレル、７…外スクリユー、７ａ…左
ねじ部、７ｂ…右ねじ部、８…内スクリユー、８
ａ…右ねじ部、１１…隔壁部、１３，１３Ａ…連
通孔、１７…押出ヘツド、１９…外流路、２０…
内流路、２２…押出ダイ部、２３…ラム。 FIG. 1 is a schematic cross-sectional view showing one embodiment of a conventional extruder, FIG. 2 is a cross-sectional view taken along the line -- in FIG. 1, and FIG. 4 is a cross-sectional view taken along the - line in FIG. 3, FIG. 5 is a schematic sectional view showing still another embodiment of the conventional extruder, FIG. 6 is a cross-sectional view taken along the line - in FIG. 5, and FIG. FIG. 8 is a schematic cross-sectional view showing still another embodiment of the extruder of the present invention, FIG. 8 is a cross-sectional view taken along the line - - of FIG. 7, FIG.
The figure is a partially cutaway front view of the outer screw in FIG. 9. 6... Cylindrical barrel, 7... Outer screw, 7a... Left threaded part, 7b... Right threaded part, 8... Inner screw, 8
a... Right-hand threaded part, 11... Partition wall part, 13, 13A... Communication hole, 17... Extrusion head, 19... Outer channel, 20...
Inner channel, 22...extrusion die section, 23...ram.

Claims (1)

【特許請求の範囲】 １ １個の筒形バレル内に、同心円状に外スクリ
ユー及び内スクリユーが配設され、それぞれのス
クリユーのねじ部に連通する材料流路がヘツド内
に形成され、さらにヘツド先端に二層押出のダイ
部が形成されている押出機において、 前記外スクリユーの外周に隔壁部が形成される
とともに、該隔壁部を挟んで筒形バレルに前記各
材料供給口が形成され、また該隔壁部から後方に
は前方のねじ部とは逆方向のねじ部が形成され、
該ねじ部の後端部に前記内スクリユーのねじ部の
元部に連通する連通孔が設けられていることを特
徴とする押出機。[Scope of Claims] 1. An outer screw and an inner screw are arranged concentrically within one cylindrical barrel, and a material flow path communicating with the threaded portion of each screw is formed in the head. In an extruder in which a die part for two-layer extrusion is formed at the tip, a partition part is formed on the outer periphery of the outer screw, and each of the material supply ports is formed in a cylindrical barrel with the partition part in between, Further, a threaded portion in the opposite direction to the threaded portion in the front is formed rearward from the partition wall,
An extruder characterized in that the rear end of the threaded portion is provided with a communication hole that communicates with the base of the threaded portion of the internal screw.
JP3216978A 1978-03-20 1978-03-20 Extruder Granted JPS54124068A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP3216978A JPS54124068A (en) 1978-03-20 1978-03-20 Extruder

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP3216978A JPS54124068A (en) 1978-03-20 1978-03-20 Extruder

Publications (2)

Publication Number Publication Date
JPS54124068A JPS54124068A (en) 1979-09-26
JPS6119414B2 true JPS6119414B2 (en) 1986-05-17

Family

ID=12351426

Family Applications (1)

Application Number Title Priority Date Filing Date
JP3216978A Granted JPS54124068A (en) 1978-03-20 1978-03-20 Extruder

Country Status (1)

Country Link
JP (1) JPS54124068A (en)

Families Citing this family (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH0541865Y2 (en) * 1986-06-30 1993-10-22
US5614227A (en) * 1995-02-08 1997-03-25 Illinois Tool Works, Inc. Extrusion apparatus
US6627134B2 (en) * 2000-09-05 2003-09-30 Community Enterprises, Llc Apparatus for molding multilayered articles
JP4853491B2 (en) * 2008-04-30 2012-01-11 日立電線株式会社 Extrusion method and apparatus
CN105109013B (en) * 2015-08-28 2017-04-19 顺德职业技术学院 Extruding machine with multilevel material extrusion molding channels
CN105082510B (en) * 2015-08-28 2017-04-19 顺德职业技术学院 Multi-segment series connection coaxial wheel type mixing extrusion device

Also Published As

Publication number Publication date
JPS54124068A (en) 1979-09-26

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