JPH0244985Y2 - - Google Patents
Info
- Publication number
- JPH0244985Y2 JPH0244985Y2 JP1985128085U JP12808585U JPH0244985Y2 JP H0244985 Y2 JPH0244985 Y2 JP H0244985Y2 JP 1985128085 U JP1985128085 U JP 1985128085U JP 12808585 U JP12808585 U JP 12808585U JP H0244985 Y2 JPH0244985 Y2 JP H0244985Y2
- Authority
- JP
- Japan
- Prior art keywords
- mandrel
- resin
- die
- layer
- intermediate layer
- 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
Links
- 239000011347 resin Substances 0.000 claims description 33
- 229920005989 resin Polymers 0.000 claims description 33
- 241000239290 Araneae Species 0.000 claims description 8
- 239000002131 composite material Substances 0.000 claims description 8
- 239000000057 synthetic resin Substances 0.000 claims description 8
- 229920003002 synthetic resin Polymers 0.000 claims description 8
- 238000004519 manufacturing process Methods 0.000 claims description 5
- -1 polyethylene, propylene Polymers 0.000 description 3
- 239000004793 Polystyrene Substances 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 239000006260 foam Substances 0.000 description 2
- 229920002223 polystyrene Polymers 0.000 description 2
- 229920000915 polyvinyl chloride Polymers 0.000 description 2
- 239000004800 polyvinyl chloride Substances 0.000 description 2
- 239000004698 Polyethylene Substances 0.000 description 1
- 239000004743 Polypropylene Substances 0.000 description 1
- 230000002159 abnormal effect Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000001125 extrusion Methods 0.000 description 1
- 238000005187 foaming Methods 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 229920000573 polyethylene Polymers 0.000 description 1
- 229920001155 polypropylene Polymers 0.000 description 1
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
- B29C48/30—Extrusion nozzles or dies
- B29C48/32—Extrusion nozzles or dies with annular openings, e.g. for forming tubular articles
- B29C48/335—Multiple annular extrusion nozzles in coaxial arrangement, e.g. for making multi-layered tubular articles
-
- 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
- B29C48/09—Articles with cross-sections having partially or fully enclosed cavities, e.g. pipes or channels
Description
【考案の詳細な説明】
〔産業上の利用分野〕
本考案は、樹脂押出機の吐出口に設けられて、
合成樹脂製内外層の間に発泡性樹脂の中間層を有
する複合管の製造用口金に関するものである。[Detailed description of the invention] [Industrial application field] The present invention is provided at the discharge port of a resin extruder,
The present invention relates to a cap for manufacturing a composite pipe having an intermediate layer of foamable resin between inner and outer layers made of synthetic resin.
塩化ポリビニル、ポリエチレン、プロピレン、
ポリスチレン等からなる合成樹脂製内外層間に、
塩化ポリビニル、ポリスチレン、ポリエチレン、
ポリプロピレン等からなる発泡性樹脂の中間層を
有する合成樹脂製複合管を製造するにあたつて
は、特開昭55−152030号公報に示される如く、中
間層を構成する発泡性樹脂と内外層を構成する樹
脂とを内外層の樹脂押出機の吐出口付近で合流さ
せる構造となつている。
polyvinyl chloride, polyethylene, propylene,
Between the inner and outer layers made of synthetic resin such as polystyrene,
polyvinyl chloride, polystyrene, polyethylene,
In manufacturing a synthetic resin composite pipe having an intermediate layer of a foamable resin made of polypropylene or the like, as shown in Japanese Patent Application Laid-Open No. 152030/1984, the foamable resin constituting the intermediate layer and the inner and outer layers are The structure is such that the resin constituting the inner and outer layers are merged near the discharge port of the resin extruder for the inner and outer layers.
しかしながら、発泡性樹脂はできるだけ押出機
内で発泡させ、口金内ではその状態を維持するよ
う低温にするのが望ましいが、内外層を構成する
樹脂は構造層として充分な強度を発揮するため押
出機内は勿論、口金内でも充分な加熱が必要であ
る。ところが特開昭55−152030号公報に示される
口金では、内外層の樹脂押出機の吐出口付近に発
泡性樹脂が投入されるため、内外層の樹脂押出機
の熱影響を受けて、中間層が異常発泡によつて独
立気泡の構成ができず、強度面で問題がある。
However, it is desirable to foam the foamable resin inside the extruder as much as possible, and keep it at a low temperature in the nozzle to maintain that state. Of course, sufficient heating is required within the mouthpiece as well. However, in the die shown in JP-A No. 55-152030, foamable resin is introduced near the discharge ports of the resin extruders for the inner and outer layers, so it is affected by the heat of the resin extruders for the inner and outer layers, and the middle layer However, due to abnormal foaming, a closed cell structure cannot be formed, and there is a problem in terms of strength.
また、三層の肉厚分布は、その強度を一定に保
つ点からできるだけバラツキが少ない方が望まし
いが、特開昭55−152030号公報に示されるもの
は、三層に合流した後に、スパイダによつて分割
され、再び収束区域で溶接されるから、三層の肉
厚にバラツキが生じ易く、肉厚の調整が困難であ
る。 In addition, it is desirable that the thickness distribution of the three layers has as little variation as possible from the point of view of keeping its strength constant, but in the case of the thickness distribution of the three layers, the spider Since it is then divided and welded again in the convergence area, variations in the thickness of the three layers tend to occur, making it difficult to adjust the thickness.
そこで、本考案は、中間層の発泡性樹脂が異常
発泡せず、また内層、外層及び中間層の肉厚調整
が容易な口金を提供するにある。 SUMMARY OF THE INVENTION The object of the present invention is therefore to provide a cap in which the foamable resin of the intermediate layer does not foam abnormally and the thicknesses of the inner layer, outer layer, and intermediate layer can be easily adjusted.
次に本考案を図面に基づいて説明する。 Next, the present invention will be explained based on the drawings.
本考案は上記目的を達成するため、合成樹脂製
内外層の間に発泡性樹脂の中間層を有する複合管
を押出成形するストレート口金において、ダイリ
ング１内の前方に中間層を構成する発泡性樹脂流
を環状に形成する第１マンドレル６をスパイダ７
にてダイリング１に支持するとともに、ダイリン
グ１の後方に外層を構成する樹脂流供給用のクロ
スヘツドダイ１３を設け、かつダイリング１内の
後方に内外層及び中間層の三層を形成する第２マ
ンドレル９をスパイダ１０にて第１マンドレル６
に支持し、内層を構成する樹脂流の供給口１７を
第１マンドレル６の後方に設けたことを特徴とす
る。 In order to achieve the above-mentioned object, the present invention provides a straight die for extrusion molding a composite tube having an intermediate layer of foamable resin between the inner and outer layers made of synthetic resin. The first mandrel 6 that forms the resin flow in an annular shape is connected to the spider 7.
At the same time, a crosshead die 13 for supplying resin flow constituting the outer layer is provided at the rear of the die ring 1, and three layers, an inner and outer layer and an intermediate layer, are formed at the rear of the die ring 1. The second mandrel 9 is connected to the first mandrel 6 by the spider 10.
The first mandrel 6 is supported by the first mandrel 6, and the supply port 17 for the resin flow constituting the inner layer is provided at the rear of the first mandrel 6.
したがつて、内層へは第１マンドレルの後方か
ら、外層へはダイリングから夫々ダイリング後方
へ流入され、この流入部に中間層が流入されて三
層からなる複合管を製造できる。
Therefore, the inner layer is flowed from behind the first mandrel, and the outer layer is flowed from the die ring to the rear of the die ring, and the intermediate layer is flowed into this inflow portion, thereby making it possible to manufacture a three-layer composite tube.
図は本考案の一実施例を示す断面正面図であ
る。
The figure is a sectional front view showing an embodiment of the present invention.
ダイリング１は、その前方に発泡性樹脂押出機
（図示せず）の吐出口より中間層２を構成する発
泡性樹脂流３を供給する供給口４が形成され、ダ
イリング１内にはトーピード５を供給口４に向け
て発泡性樹脂流３を環状に形成する第１マンドレ
ル６がスパイダ７にて支持されるとともに第１マ
ンドレルの後方にトーピード８を第１マンドレル
に向けて第２マンドレル９がスパイダ１０にて第
１マンドレル６の後部に支持されている。また、
ダイリング１内の第２マンドレル９の前方部に対
応する位置には外層１１を構成する樹脂流１２を
供給するクロスヘツドダイ１３が設けられてい
る。第１マンドレル６には内層１４を構成する樹
脂流１５の供給路１６が形成され、第１マンドレ
ル６の後部にその供給口１７が形成されている。
ダイリング１の胴部には内外層構成用樹脂押出機
（図示せず）のゲート１８が配置され、このゲー
ト１８は二分されて夫々流量調整バルブ１９，２
０を介してクロスヘツドダイ１３及び供給路１６
に連通している。 The die ring 1 has a supply port 4 formed in front thereof for supplying a foamable resin flow 3 forming the intermediate layer 2 from a discharge port of a foamable resin extruder (not shown), and a torpedo in the die ring 1. A first mandrel 6 is supported by a spider 7 and a second mandrel 9 is mounted behind the first mandrel to form a foamable resin flow 3 in an annular shape with the torpedo 8 directed toward the supply port 4. is supported by a spider 10 at the rear of the first mandrel 6. Also,
A crosshead die 13 for supplying a resin flow 12 constituting the outer layer 11 is provided in the die ring 1 at a position corresponding to the front part of the second mandrel 9. A supply passage 16 for a resin flow 15 constituting the inner layer 14 is formed in the first mandrel 6 , and a supply port 17 is formed at the rear of the first mandrel 6 .
A gate 18 of a resin extruder (not shown) for forming the inner and outer layers is arranged in the body of the die ring 1, and this gate 18 is divided into two parts with flow rate adjustment valves 19 and 2, respectively.
0 to the crosshead die 13 and the supply path 16
is connected to.
したがつて発泡性樹脂押出機より供給口４に供
給された樹脂流３は第１マンドレル６にて環状に
形成されながら後方に移動し、一方内外層構成用
樹脂押出機より供給された樹脂流は、ゲート１８
を経て二分され、外層１１の樹脂流にはクロスヘ
ツドダイ１３より供給され、内層１４の樹脂流は
第１マンドレル６の供給路１６を介して供給口１
７より供給され、ダイリング１と第２マンドレル
９とによつて三層に形成され後方のフオーマ（図
示せず）に送られる。 Therefore, the resin flow 3 supplied from the foamable resin extruder to the supply port 4 moves backward while being formed into an annular shape by the first mandrel 6, while the resin flow supplied from the resin extruder for forming the inner and outer layers is gate 18
The resin flow of the outer layer 11 is supplied from the crosshead die 13, and the resin flow of the inner layer 14 is supplied to the supply port 1 through the supply path 16 of the first mandrel 6.
7, formed into three layers by the die ring 1 and the second mandrel 9, and sent to the rear former (not shown).
本考案は以上のように、ダイリング内に第１及
び第２マンドレルを直列に配し、中間層を構成す
る発泡性樹脂を口金前方から流入するとともに、
外層を構成する合成樹脂をダイリング後方から、
内層を構成する合成樹脂を第１マンドレルに後方
から流入し、口金後方にて三層を形成して複合管
を製造するようにしたから、発泡性樹脂が低温に
維持された状態で口金内を移動でき、独立気泡が
形成され易く、複合管の強度が保たれ、また、後
方にて三層を形成するため、三層の肉厚を一定に
保つことができる。
As described above, the present invention arranges the first and second mandrels in series within the die ring, allows the foamable resin constituting the intermediate layer to flow from the front of the die, and
Die-ring the synthetic resin that makes up the outer layer from behind.
The synthetic resin that makes up the inner layer flows into the first mandrel from the rear, forming three layers at the rear of the mouthpiece to manufacture a composite tube, so the inside of the mouthpiece is kept in a state where the foamable resin is maintained at a low temperature. It is movable, easy to form closed cells, the strength of the composite tube is maintained, and since three layers are formed at the rear, the thickness of the three layers can be kept constant.
図は本考案の一実施例を示す断面正面図であ
る。
１……ダイリング、２……中間層、５，８……
トーピード、６……第１マンドレル、７，１０…
…スパイダ、９……第２マンドレル、１１……外
層、１３……クロスヘツドダイ、１４……肉厚、
１６……供給路、１７……供給口。
The figure is a sectional front view showing an embodiment of the present invention. 1... Dairing, 2... Middle class, 5, 8...
Torpedo, 6...1st mandrel, 7, 10...
... Spider, 9 ... Second mandrel, 11 ... Outer layer, 13 ... Crosshead die, 14 ... Thickness,
16... Supply path, 17... Supply port.
Claims (1)
有する複合管を押出成形するストレート口金にお
いて、ダイリング１内の前方に中間層を構成する
発泡性樹脂流を環状に形成する第１マンドレル６
をスパイダ７にてダイリング１に支持するととも
に、ダイリング１の後方に外層を構成する樹脂流
供給用のクロスヘツドダイ１３を設け、かつダイ
リング１内の後方に内外層及び中間層の三層を形
成する第２マンドレル９をスパイダ１０にて第１
マンドレル６に支持し、内層を構成する樹脂流の
供給口１７を第１マンドレル６の後方に設けたこ
とを特徴とする合成樹脂製複合管製造用ストレー
ト口金。 In a straight die for extruding a composite pipe having an intermediate layer of foamable resin between inner and outer layers made of synthetic resin, a first mandrel forms a flow of foamable resin in an annular shape at the front of the die ring 1 to form the intermediate layer. 6
is supported on the die ring 1 by the spider 7, and a crosshead die 13 for supplying the resin flow constituting the outer layer is provided at the rear of the die ring 1. The second mandrel 9 for forming the layer is moved to the first by the spider 10.
A straight pipe for manufacturing a synthetic resin composite pipe supported by a mandrel 6, characterized in that a supply port 17 for a resin flow constituting an inner layer is provided at the rear of the first mandrel 6.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1985128085U JPH0244985Y2 (en) | 1985-08-22 | 1985-08-22 |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1985128085U JPH0244985Y2 (en) | 1985-08-22 | 1985-08-22 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS6235814U JPS6235814U (en) | 1987-03-03 |
| JPH0244985Y2 true JPH0244985Y2 (en) | 1990-11-29 |
Family
ID=31023434
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP1985128085U Expired JPH0244985Y2 (en) | 1985-08-22 | 1985-08-22 |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0244985Y2 (en) |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4944972A (en) * | 1987-12-31 | 1990-07-31 | American National Can Company | Coextrusion apparatus, methods, and related films and packages |
| JP2731799B2 (en) * | 1989-06-06 | 1998-03-25 | 株式会社フジクラ | Extrusion coating method of resin |
| JPH0795591B2 (en) * | 1990-02-21 | 1995-10-11 | 松下電器産業株式会社 | Solid-state imaging device and manufacturing method thereof |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS55152030A (en) * | 1979-05-10 | 1980-11-27 | Sogecan | Method and device for manufacturing compound plastic pipe by extrusion |
-
1985
- 1985-08-22 JP JP1985128085U patent/JPH0244985Y2/ja not_active Expired
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS55152030A (en) * | 1979-05-10 | 1980-11-27 | Sogecan | Method and device for manufacturing compound plastic pipe by extrusion |
Also Published As
| Publication number | Publication date |
|---|---|
| JPS6235814U (en) | 1987-03-03 |
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