JPS6143170B2 - - Google Patents
Info
- Publication number
- JPS6143170B2 JPS6143170B2 JP57111796A JP11179682A JPS6143170B2 JP S6143170 B2 JPS6143170 B2 JP S6143170B2 JP 57111796 A JP57111796 A JP 57111796A JP 11179682 A JP11179682 A JP 11179682A JP S6143170 B2 JPS6143170 B2 JP S6143170B2
- Authority
- JP
- Japan
- Prior art keywords
- resin
- outer layer
- layer resin
- supply port
- passage
- 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
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
- B29C48/337—Multiple annular extrusion nozzles in coaxial arrangement, e.g. for making multi-layered tubular articles the components merging at a common location
- B29C48/338—Multiple annular extrusion nozzles in coaxial arrangement, e.g. for making multi-layered tubular articles the components merging at a common location using a die with concentric parts, e.g. rings, cylinders
-
- 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
-
- 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
- B29C48/10—Articles with cross-sections having partially or fully enclosed cavities, e.g. pipes or channels flexible, e.g. blown foils
-
- 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
- B29C48/16—Articles comprising two or more components, e.g. co-extruded layers
- B29C48/18—Articles comprising two or more components, e.g. co-extruded layers the components being layers
- B29C48/21—Articles comprising two or more components, e.g. co-extruded layers the components being layers the layers being joined at their surfaces
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29K—INDEXING SCHEME ASSOCIATED WITH SUBCLASSES B29B, B29C OR B29D, RELATING TO MOULDING MATERIALS OR TO MATERIALS FOR MOULDS, REINFORCEMENTS, FILLERS OR PREFORMED PARTS, e.g. INSERTS
- B29K2105/00—Condition, form or state of moulded material or of the material to be shaped
- B29K2105/04—Condition, form or state of moulded material or of the material to be shaped cellular or porous
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Manufacturing & Machinery (AREA)
- Extrusion Moulding Of Plastics Or The Like (AREA)
- Molding Of Porous Articles (AREA)
Description
【発明の詳細な説明】
本発明は非発泡性樹脂フイルムを内層とし、発
泡性樹脂フイルムを外層とする複層、筒状樹脂フ
イルムを製造する方法に関するもので、その目的
は、ダイス内部において発生する発泡樹脂の滞留
を解消し、均一な発泡性樹脂フイルムを形成する
ことにより内層の非発泡性樹脂フイルムを完全に
被覆し品質の向上を図つたことである。DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a method for producing a multi-layer, cylindrical resin film having a non-foamable resin film as an inner layer and a foamable resin film as an outer layer. By eliminating the stagnation of foamed resin and forming a uniform foamed resin film, the inner non-foamed resin film is completely covered and the quality is improved.
なお該フイルムは第４図に示すように、内層を
非発泡性樹脂フイルム１１ａとし、外層を発泡性
樹脂フイルム１１ｂとなるようにして製袋するこ
とにより各種の包材として使用される。 As shown in FIG. 4, the film is used as various packaging materials by forming a bag so that the inner layer is a non-foamable resin film 11a and the outer layer is a foamable resin film 11b.
この筒状樹脂フイルム１１はダイスによつて押
出成形されるがそのダイスは、ノズル本体の外周
に環状の内層樹脂通路と外層樹脂通路とを区面し
て形成し、ノズル本体の下面に前記内層樹脂通路
に連通する内層樹脂供給口を、また側面に前記外
層樹脂通路に連通する外層樹脂供給口を設け、ノ
ズル本体の上面に前記内層樹脂通路と外層樹脂通
路とが合流するフイルム成形用の環状スリツトを
形成した構造であり、内層の非発泡性樹脂フイル
ム１１ａを外層の発泡性樹脂フイルム１１ｂに環
状的に被覆する。 This cylindrical resin film 11 is extrusion molded using a die, which forms an annular inner layer resin passage and an annular outer layer resin passage on the outer periphery of the nozzle body, and forms an annular inner layer resin passage and an annular outer layer resin passage on the lower surface of the nozzle body. An annular resin supply port for film molding is provided with an inner layer resin supply port communicating with the resin passage, and an outer layer resin supply port communicating with the outer layer resin passage on the side surface, and the inner layer resin passage and the outer layer resin passage merge on the upper surface of the nozzle body. It has a structure in which a slit is formed, and an inner layer of non-foamable resin film 11a is annularly covered with an outer layer of foamable resin film 11b.
ところで、ダイスの側面に設けられた外層樹脂
供給口より注入された外層樹脂は、外層樹脂供給
口を起点として環状の外層樹脂通路の周方向に左
右分流し、外層樹脂供給口とは正反対位置で合流
して筒状に押出成形される。従つて、前記合流点
は外層樹脂供給口より最も離れた位置であるた
め、樹脂の流圧が供給口よりも弱くなり、合流点
における樹脂の流れが遅速となつて樹脂の滞留が
常態的に発生する。更にまた、外層樹脂供給口よ
り水平方向に注入された外層樹脂は外層樹脂通路
で漸次垂直方向に立ち上るが、前記合流点におけ
る樹脂流圧が弱いので、この立ち上りの力も弱く
滞留の状態を一層助長するなどの問題点がある。 By the way, the outer layer resin injected from the outer layer resin supply port provided on the side surface of the die flows into left and right branches in the circumferential direction of the annular outer layer resin passage starting from the outer layer resin supply port, and is distributed at a position exactly opposite to the outer layer resin supply port. They are combined and extruded into a cylindrical shape. Therefore, since the confluence point is the farthest position from the outer layer resin supply port, the flow pressure of the resin is weaker than that of the supply port, and the resin flow at the confluence point becomes slow and the resin normally stagnates. Occur. Furthermore, the outer layer resin injected horizontally from the outer layer resin supply port gradually rises in the vertical direction in the outer layer resin passage, but since the resin flow pressure at the confluence point is weak, the rising force is also weak and further promotes the stagnation state. There are problems such as:
このようにして発生した滞留樹脂は正常に流動
する樹脂よりもダイス本体内における滞留時間が
当然長いために、ダイスの形成熱を多く受けるこ
とになり、気泡が不規則に膨大したり熱分解を起
して、気泡が破裂又は焼けるなどして消減し不良
発泡層となる。 The stagnant resin generated in this way naturally has a longer residence time in the die body than normally flowing resin, so it receives more of the die's formation heat, causing irregular bubble expansion and thermal decomposition. Then, the bubbles burst or burn and disappear, resulting in a defective foam layer.
その結果、ダイスより押出成形された複層の筒
状樹脂フイルムは、正常な発泡部分不良発泡部分
の二面を持つた筋目のある外層樹脂フイルムとな
り不良品を製造する欠点があつた。 As a result, a multi-layer cylindrical resin film extruded from a die becomes a serrated outer resin film with two sides, a normal foamed part and a defective foamed part, resulting in the production of defective products.
本発明は上記従来の問題を解決したもので、そ
の要旨とするところは、前記外層樹脂通路におけ
る外層樹脂供給口とは正反対位置の樹脂の周方向
合流点の樹脂の一部を外部に放出し、樹脂の流動
を活発にして滞留を解消させたことである。 The present invention solves the above-mentioned conventional problem, and its gist is to release a portion of the resin at the circumferential confluence of the resins at a position directly opposite to the outer layer resin supply port in the outer layer resin passage to the outside. This is because the flow of the resin is activated and the stagnation is eliminated.
以下本発明の一実施例について図面に基いて説
明する。第１図及び第２図において１はダイスで
ある。このダイス１は、ノズル本体２の外周に嵌
挿された内筒３により環状の内層樹脂通路４を形
成し、さらに、内筒３の外周に嵌挿された外筒７
により環状の外層樹脂通路８が形成される。そし
て、ノズル本体２の下面中央部に内層樹脂供給口
５が設けられ、ノズル本体２の径方向に穿設した
導通穴６を介して内層樹脂通路４に連通してい
る。また、内筒３と一体の側部には外層樹脂供給
口９が水平方向に設けられ、外層樹脂通路と連通
している。 An embodiment of the present invention will be described below with reference to the drawings. In FIGS. 1 and 2, 1 is a die. This die 1 includes an inner cylinder 3 fitted on the outer periphery of a nozzle body 2 to form an annular inner layer resin passage 4, and an outer cylinder 7 fitted on the outer periphery of the inner cylinder 3.
Thus, an annular outer layer resin passage 8 is formed. An inner layer resin supply port 5 is provided at the center of the lower surface of the nozzle body 2 and communicates with the inner layer resin passage 4 via a conduction hole 6 formed in the radial direction of the nozzle body 2. Further, an outer layer resin supply port 9 is horizontally provided in a side portion integral with the inner cylinder 3 and communicates with the outer layer resin passage.
ノズル本体２の上部には、リング１２によつて
内層樹脂通路４と外層樹脂通路８とが合流するフ
イルム成形用の環状スリツト１０が設けられてい
る。 An annular slit 10 for film molding is provided in the upper part of the nozzle body 2 in which the inner layer resin passage 4 and the outer layer resin passage 8 join together through a ring 12.
そこで、本発明は、前記外層樹脂供給口９から
注入された外層用樹脂（発泡性樹脂）が、外層樹
脂供給口９を起点にして環状の外層樹脂通路８の
周方向に左右分流し、これが前記外層樹脂供給口
９とは正反対位置で合流する合流点８ａにダイス
１外に連通する樹脂放出細孔１３を設けたもので
ある。尚、この樹脂放出細孔１３の出口に絞り開
閉自在な樹脂抜き栓１４を取付けてもよい。１５
は樹脂抜き栓１４より放出される糸状の放出樹脂
である。 Therefore, in the present invention, the outer layer resin (foamable resin) injected from the outer layer resin supply port 9 flows left and right in the circumferential direction of the annular outer layer resin passage 8 starting from the outer layer resin supply port 9. A resin discharge pore 13 communicating with the outside of the die 1 is provided at a confluence point 8a that merges at a position exactly opposite to the outer layer resin supply port 9. Incidentally, a resin drain plug 14 which can be freely opened and closed may be attached to the outlet of the resin discharge hole 13. 15
is a thread-like discharged resin discharged from the resin drain plug 14.
第３図において１６は内層樹脂押出機であり内
層樹脂供給口５の連結され、非発泡性樹脂を供給
する。１７は外層樹脂押出機であり外層樹脂供給
口９に連結され、発泡性樹脂を供給する。 In FIG. 3, reference numeral 16 denotes an inner layer resin extruder, to which the inner layer resin supply port 5 is connected, and supplies non-foamable resin. Reference numeral 17 denotes an outer layer resin extruder, which is connected to the outer layer resin supply port 9 and supplies foamable resin.
次に上記本発明の作用について説明する。内層
を非発泡性樹脂フイルム１１ａとし、外層を発泡
性樹脂フイルム１１ｂとする複層の筒状樹脂フイ
ルム１１は在来と同様にダイス１のフイルム成形
用の環状スリツトより上方に向つて押出成形され
る。すなわち、内層樹脂供給口５に供給された内
層用樹脂は導通穴６を介して内層樹脂通路４に導
入され環状となつて垂直方向に上昇する。また、
外層樹脂供給口９に供給された外層樹脂は、外層
樹脂通路８を前記外層樹脂供給口９を起点にして
周方向に左右分流し、外層樹脂供給口９とは正反
対位置の合流点８ａに再び合流して環状となり、
垂直方向に上昇する。そして、フイルム成形用の
環状スリツト１０にて上昇する内層樹脂と外層樹
脂とが合流し、外層の発泡性樹脂フイルム１１ｂ
の内周に内層の非発泡性樹脂フイルム１１ａが被
覆され複層の筒状樹脂フイルム１１として押出成
形するものである。 Next, the operation of the present invention will be explained. A multi-layer cylindrical resin film 11 having an inner layer made of a non-foamed resin film 11a and an outer layer made of a foamed resin film 11b is extruded upward from the annular slit for film forming of the die 1 in the same manner as in the conventional method. Ru. That is, the inner layer resin supplied to the inner layer resin supply port 5 is introduced into the inner layer resin passage 4 through the conduction hole 6, forms an annular shape, and rises vertically. Also,
The outer layer resin supplied to the outer layer resin supply port 9 flows through the outer layer resin passage 8 into left and right branches in the circumferential direction starting from the outer layer resin supply port 9, and returns to the confluence point 8a located directly opposite to the outer layer resin supply port 9. merge to form a ring,
Rise vertically. Then, the inner layer resin and the outer layer resin rising in the annular slit 10 for film molding meet, forming the outer layer foamable resin film 11b.
The inner periphery of the cylindrical resin film 11 is coated with an inner non-foamable resin film 11a, and is extruded to form a multilayer cylindrical resin film 11.
そこで、本発明においては、外層樹脂通路８の
外層樹脂供給口９とは正反対位置の合流点８ａか
ら樹脂放出細孔１３を介して滞留しがちな樹脂を
常時ダイス外に放出するために樹脂の流動が活発
となり、滞留を解消すると共に、樹脂の流圧を外
層樹脂供給口９の部位と均等化し、環状スリツト
１０方向への上昇力又は樹脂流が滞留分解の影響
を受けて、部分的な乱れを起すことなく正常に得
られ、不良発泡の発生を防止するのである。尚、
若し何らかの理由で、合流点８ａで樹脂の滞留が
起り、不良発泡性樹脂が生成しても、その不良発
泡性樹脂は樹脂放出細孔１３よりダイス１の外部
に絶えず放出されるので、成形される複層の筒状
樹脂フイルム１１の製品に悪影響を及ぼすことは
ない。 Therefore, in the present invention, in order to constantly discharge the resin that tends to stagnate out of the die from the confluence point 8a of the outer layer resin passage 8, which is located directly opposite to the outer layer resin supply port 9, through the resin discharge pores 13, The flow becomes active, eliminating the stagnation, equalizing the flow pressure of the resin with the part of the outer layer resin supply port 9, and causing the upward force or resin flow in the direction of the annular slit 10 to be partially affected by the stagnation and decomposition. It is possible to obtain the foam normally without causing any disturbance, thereby preventing the occurrence of defective foaming. still,
Even if resin stagnation occurs at the confluence point 8a for some reason and a defective foamable resin is produced, the defective foamable resin is constantly discharged to the outside of the die 1 through the resin release pores 13, so that molding is possible. This will not adversely affect the product of the multi-layer cylindrical resin film 11.
このように本発明は外層樹脂通路の特定位置に
滞留樹脂を外部に放出するようにしたものである
から、外層となる発泡樹脂は不良発泡することな
く常に正常な発泡樹脂フイルムとなり、内層の非
発泡樹脂フイルムと合流して品質良好な複層の筒
状樹脂フイルムを製造することができる効果を有
している。 In this way, the present invention is designed to release the residual resin to the outside at a specific position in the outer layer resin passage, so that the foamed resin that becomes the outer layer always becomes a normal foamed resin film without causing defective foaming, and the non-foamed resin of the inner layer is prevented. It has the effect of being able to merge with the foamed resin film to produce a multilayer cylindrical resin film of good quality.
図面は本発明方法の一実施例を示すもので、第
１図はダイスの縦断面図、第２図は第１図−
線断面図、第３図はダイスを各押出機と連結した
状態の側面図、第４図は複層の筒状樹脂フイルム
の断面図である。
１……ダイス、２……ノズル本体、３……内
筒、４……内層樹脂通路、５……内層樹脂供給
口、６……導通穴、７……外筒、８……外層樹脂
通路、８ａ……合流点、９……外層樹脂供給口、
１０……環状スリツト、１１……筒状樹脂フイル
ム、１３……樹脂放出細孔、１４……樹脂抜き
栓。
The drawings show an embodiment of the method of the present invention, in which FIG. 1 is a vertical cross-sectional view of a die, and FIG. 2 is a cross-sectional view of a die.
A line sectional view, FIG. 3 is a side view of the die connected to each extruder, and FIG. 4 is a sectional view of a multilayer cylindrical resin film. 1...Dice, 2...Nozzle body, 3...Inner tube, 4...Inner layer resin passage, 5...Inner layer resin supply port, 6...Conducting hole, 7...Outer cylinder, 8...Outer layer resin passage , 8a... Confluence point, 9... Outer layer resin supply port,
10... Annular slit, 11... Cylindrical resin film, 13... Resin release pore, 14... Resin drain plug.
Claims (1)
脂フイルムを外層とする複層の筒状樹脂フイルム
を製造する方法であつて、ノズル本体の外周に嵌
挿された内筒により環状の内層樹脂通路を形成
し、前記内筒の外周に嵌挿された外筒により環状
の外層樹脂通路を形成し、ノズル本体の下面の略
中央部に前記内層樹脂通路に連通する内層樹脂供
給口を、また外層樹脂通路の側方に外層樹脂供給
口を設け、ノズル本体の上部で前記内層樹脂通路
と外層樹脂通路とが合流するフイルム成形用の環
状スリツトより前記複層の筒状樹脂フイルムを押
出成形する工程において、前記外層樹脂供給口か
ら注入された外層用樹脂が外層樹脂供給口を起点
にして環状の外層樹脂通路の周方向に左右分流
し、これが前記外層樹脂供給口とは正反対位置で
合流する合流点に外層樹脂通路外部に連通する樹
脂放出細孔を設け、この樹脂放出細孔より前記合
流点における滞留樹脂を外部に放出することを特
徴とする筒状樹脂フイルムの製造方法。1. A method for manufacturing a multi-layer cylindrical resin film having a non-foamable resin film as an inner layer and a foamable resin film as an outer layer, in which an annular inner layer resin passage is formed by an inner cylinder fitted around the outer periphery of a nozzle body. an annular outer layer resin passage is formed by an outer cylinder fitted on the outer periphery of the inner cylinder, an inner layer resin supply port communicating with the inner layer resin passage is formed approximately at the center of the lower surface of the nozzle body; A step of providing an outer layer resin supply port on the side of the resin passage, and extruding the multilayer cylindrical resin film through an annular slit for film molding where the inner layer resin passage and the outer layer resin passage merge at the upper part of the nozzle body. In the outer layer resin injected from the outer layer resin supply port, the outer layer resin flows into left and right branches in the circumferential direction of the annular outer layer resin passage starting from the outer layer resin supply port, and these flow into a confluence at a position directly opposite to the outer layer resin supply port. A method for manufacturing a cylindrical resin film, characterized in that resin discharge pores communicating with the outside of the outer layer resin passage are provided at points, and the resin remaining at the confluence point is discharged to the outside from the resin discharge pores.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP57111796A JPS592817A (en) | 1982-06-30 | 1982-06-30 | Manufacture of tubular resin film |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP57111796A JPS592817A (en) | 1982-06-30 | 1982-06-30 | Manufacture of tubular resin film |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS592817A JPS592817A (en) | 1984-01-09 |
| JPS6143170B2 true JPS6143170B2 (en) | 1986-09-26 |
Family
ID=14570366
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP57111796A Granted JPS592817A (en) | 1982-06-30 | 1982-06-30 | Manufacture of tubular resin film |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS592817A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS6326581U (en) * | 1986-08-01 | 1988-02-22 |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE10356354A1 (en) * | 2003-11-28 | 2005-06-30 | Eta Kunstofftechnologie Gmbh | Method and device for producing endless extrudates, in particular extruded or hollow profiles |
-
1982
- 1982-06-30 JP JP57111796A patent/JPS592817A/en active Granted
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS6326581U (en) * | 1986-08-01 | 1988-02-22 |
Also Published As
| Publication number | Publication date |
|---|---|
| JPS592817A (en) | 1984-01-09 |
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