JPS647860B2 - - Google Patents
Info
- Publication number
- JPS647860B2 JPS647860B2 JP56096281A JP9628181A JPS647860B2 JP S647860 B2 JPS647860 B2 JP S647860B2 JP 56096281 A JP56096281 A JP 56096281A JP 9628181 A JP9628181 A JP 9628181A JP S647860 B2 JPS647860 B2 JP S647860B2
- Authority
- JP
- Japan
- Prior art keywords
- tube
- surface layer
- conduit
- cooling
- thermoplastic resin
- 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
- 239000002344 surface layer Substances 0.000 claims description 15
- 238000000034 method Methods 0.000 claims description 9
- 238000004513 sizing Methods 0.000 claims description 9
- 229920005992 thermoplastic resin Polymers 0.000 claims description 8
- 238000001816 cooling Methods 0.000 claims description 6
- 238000004519 manufacturing process Methods 0.000 claims description 4
- 238000010438 heat treatment Methods 0.000 claims description 2
- 239000000088 plastic resin Substances 0.000 claims 1
- 239000007788 liquid Substances 0.000 description 7
- 238000001125 extrusion Methods 0.000 description 6
- 238000002844 melting Methods 0.000 description 6
- 230000008018 melting Effects 0.000 description 6
- 239000000463 material Substances 0.000 description 4
- 230000032683 aging Effects 0.000 description 3
- 238000009864 tensile test Methods 0.000 description 3
- 230000000052 comparative effect Effects 0.000 description 2
- 238000005520 cutting process Methods 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 2
- 239000004677 Nylon Substances 0.000 description 1
- 239000000498 cooling water Substances 0.000 description 1
- 229920001778 nylon Polymers 0.000 description 1
- 230000002093 peripheral effect Effects 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
- B29C48/88—Thermal treatment of the stream of extruded material, e.g. cooling
- B29C48/90—Thermal treatment of the stream of extruded material, e.g. cooling with calibration or sizing, i.e. combined with fixing or setting of the final dimensions of the extruded article
-
- 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
- B29C48/25—Component parts, details or accessories; Auxiliary operations
- B29C48/88—Thermal treatment of the stream of extruded material, e.g. cooling
- B29C48/885—External treatment, e.g. by using air rings for cooling tubular films
-
- 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
- B29C48/88—Thermal treatment of the stream of extruded material, e.g. cooling
- B29C48/91—Heating, e.g. for cross linking
-
- 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
- B29C48/88—Thermal treatment of the stream of extruded material, e.g. cooling
- B29C48/919—Thermal treatment of the stream of extruded material, e.g. cooling using a bath, e.g. extruding into an open bath to coagulate or cool the material
-
- 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
- B29C48/88—Thermal treatment of the stream of extruded material, e.g. cooling
- B29C48/90—Thermal treatment of the stream of extruded material, e.g. cooling with calibration or sizing, i.e. combined with fixing or setting of the final dimensions of the extruded article
- B29C48/904—Thermal treatment of the stream of extruded material, e.g. cooling with calibration or sizing, i.e. combined with fixing or setting of the final dimensions of the extruded article using dry calibration, i.e. no quenching tank, e.g. with water spray for cooling or lubrication
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Physics & Mathematics (AREA)
- Thermal Sciences (AREA)
- Processing And Handling Of Plastics And Other Materials For Molding In General (AREA)
- Extrusion Moulding Of Plastics Or The Like (AREA)
Description
【発明の詳細な説明】
本発明は熱可塑性樹脂チユーブ、特に耐久性に
すぐれた熱可塑性樹脂チユーブの製造方法に関す
るものである。DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a thermoplastic resin tube, and particularly to a method for producing a thermoplastic resin tube with excellent durability.
熱可塑性樹脂チユーブを押出成形する場合、チ
ユーブの外観および外径寸法精度を向上させるた
め押出成形ライン中にサイジング装置が設けら
れ、押出しされたチユーブをサイジング装置を通
過させることにより外観や外径寸法精度の向上を
はかつている。サイジング装置は一般に所定の径
の管路を有しており、管路よりもやや外径が大き
く半溶融状態で押出されたチユーブが管路を通過
するように構成されている。 When extrusion molding thermoplastic resin tubes, a sizing device is installed in the extrusion molding line to improve the appearance and outer diameter dimension accuracy of the tube. We aim to improve accuracy. A sizing device generally has a conduit of a predetermined diameter, and is configured so that a tube having a slightly larger outer diameter than the conduit and extruded in a semi-molten state passes through the conduit.
ところで、サイジングを行なつた熱可塑性樹脂
チユーブは、これが高温雰囲気中で使用されると
サイジングがなされていないチユーブに比べて引
張り伸度の劣下が著しく、自動車のエンジンルー
ム内における如き高温雰囲気中での使用に問題が
ある。 By the way, when a thermoplastic resin tube that has undergone sizing is used in a high-temperature atmosphere, its tensile elongation is significantly lower than that of a tube that has not been sized. I have a problem using it.
本発明は、熱老化後の引張り特性を向上せしめ
た熱可塑性樹脂チユーブを得るための製造方法を
提供することを目的とするもので、常法により押
出し、サイジング、冷却を行なつて得られたチユ
ーブを高温液槽に浸漬したり、あるいはバーナー
炎をあてる等で瞬間的に加熱してチユーブの表面
層のみを溶融せしめ、再び冷却固化せしめる工程
を付加することにより上記の目的を達成するもの
である。 The object of the present invention is to provide a manufacturing method for obtaining thermoplastic resin tubes with improved tensile properties after heat aging. The above purpose is achieved by adding a step in which only the surface layer of the tube is melted by immersing the tube in a high-temperature liquid bath or by applying a burner flame, etc., to melt only the surface layer of the tube, and then cooled and solidified again. be.
以下、本発明を実施例により説明する。 The present invention will be explained below with reference to Examples.
第１図に示すように、押出機１で可塑化された
半溶融状態の熱可塑性樹脂が、押出ヘツド２より
チユーブ状に押出され、サイジング装置３を通過
する間に所定の外面寸法形状に成形される。 As shown in FIG. 1, a semi-molten thermoplastic resin that has been plasticized in an extruder 1 is extruded into a tube shape from an extrusion head 2, and is shaped into a predetermined external shape while passing through a sizing device 3. be done.
サイジング装置３は周壁に多数の透孔３１ａを
有するパイプ状の管路３１を具備し、そのまわり
には真空室３１ｂが形成されている。管路３１の
径は目的とするチユーブ２０の径とほぼ同一とし
てある。押出ヘツド２より押出されたチユーブの
径は管路３１の径よりもやや大きく、このチユー
ブが管路３１を通過するときにその外周が真空に
引かれることにより、チユーブは管路３１に密着
した状態で管路３１を通過し、所定外径寸法で、
かつ表面状態のよいチユーブとなる。そしてこの
チユーブは冷却槽４を通過することで冷却固化さ
れ、エアブロー５でチユーブ表面に残存する水滴
が除去される。以上は、従来の工程と同一であ
る。 The sizing device 3 includes a pipe-like conduit 31 having a large number of through holes 31a in its peripheral wall, and a vacuum chamber 31b is formed around it. The diameter of the conduit 31 is approximately the same as the diameter of the target tube 20. The diameter of the tube extruded from the extrusion head 2 is slightly larger than the diameter of the conduit 31, and when the tube passes through the conduit 31, its outer circumference is evacuated, so that the tube comes into close contact with the conduit 31. It passes through the conduit 31 in the state and has a predetermined outer diameter dimension,
The result is a tube with a good surface condition. The tube is cooled and solidified by passing through a cooling tank 4, and water droplets remaining on the tube surface are removed by an air blow 5. The above steps are the same as the conventional process.
このようにして得られたチユーブは更に高温液
槽６を瞬間的に通過せしめられることにより表面
層のみが溶融する。その後エアブロー７で表面に
残存する液が除去され、水槽８を通過することに
より溶融した表面層が冷却固化し、引取り機９で
引き取られ、成形を完了してチユーブ２０は裁断
機１０で所定長さに裁断される。 The tube thus obtained is further instantaneously passed through a high-temperature liquid bath 6, so that only the surface layer is melted. After that, the liquid remaining on the surface is removed by an air blow 7, and the molten surface layer is cooled and solidified by passing through a water tank 8, and is taken up by a take-up machine 9, completing the forming, and the tube 20 is cut into a predetermined shape by a cutting machine 10. cut to length.
上記の工程により得られた本発明による12−ナ
イロン製チユーブ（外径６mm、内径４mm、表面層
を溶融せしめるための処理液としては220℃の東
京応化工業株式会社製トーレツク液を使用し、チ
ユーブの槽内通過時間は１秒とした）と、サイジ
ングと冷却を行なつたのみの比較材チユーブとに
ついて引張り試験を行なつた。 A 12-nylon tube according to the present invention obtained by the above process (outer diameter 6 mm, inner diameter 4 mm, Torek liquid manufactured by Tokyo Ohka Kogyo Co., Ltd. at 220°C was used as the treatment liquid for melting the surface layer). A tensile test was conducted on a comparison material tube that had only undergone sizing and cooling.
試験は、チユーブを120℃に72時間保持せしめ
て熱老化させ、クロスヘツドスピード100mm／
min、支点間距離110mmで引張り試験をした。第
２図に比較材チユーブの、第３図に本発明による
チユーブの、それぞれの結果を示す。 In the test, the tube was kept at 120℃ for 72 hours to heat age it, and the crosshead speed was 100mm/
A tensile test was conducted at a distance between the supports of 110 mm and 110 mm. FIG. 2 shows the results for the comparison material tube, and FIG. 3 shows the results for the tube according to the present invention.
比較材チユーブは、降伏点に達した直後、伸び
がほとんどない状態で破断した。これに対して本
発明によるチユーブは降伏点に達して後も破断す
ることなく、300％以上の伸びが示された。 The comparison material tube broke immediately after reaching the yield point with almost no elongation. On the other hand, the tube according to the present invention did not break even after reaching the yield point, and showed an elongation of over 300%.
このように本発明によるチユーブが比較材チユ
ーブに比べてすぐれた特性を示すのは、サイジン
グ工程でチユーブの表面に配向歪みが現れ、これ
により熱老化後の引張り伸びが低下するが、本発
明では、このチユーブの表面層を再び溶融させる
ことにより表面歪みが除去され、伸びの低下がな
くなることによるものと認められる。 The reason why the tube according to the present invention exhibits superior properties compared to comparative tubes is that orientation distortion appears on the surface of the tube during the sizing process, which reduces the tensile elongation after heat aging. It is recognized that this is because the surface strain is removed by melting the surface layer of the tube again, and the decrease in elongation is eliminated.
なお、上記実施例では、チユーブの表面層を溶
融する手段として高温液を用いたが、バーナ炎で
加熱するなど他の手段を用いてもよく、要はチユ
ーブの表面を瞬間的に加熱して表面層のみを溶融
できる手段であればよい。 In the above example, a high temperature liquid was used as a means to melt the surface layer of the tube, but other means such as heating with a burner flame may also be used.In short, the surface layer of the tube is heated instantaneously. Any means that can melt only the surface layer may be used.
発明者らの実施では表面層を溶融することで、
チユーブの外径寸法精度および外観への影響は認
められなかつた。チユーブ表面層溶融装置は上記
実施例のように押出成形ラインに組込んでもよ
く、またいつたんチユーブを押出成形した後、ラ
イン外の装置で表面層溶融を行なつてもよい。 In the inventors' implementation, by melting the surface layer,
No influence on the outer diameter dimensional accuracy or appearance of the tube was observed. The tube surface layer melting device may be incorporated into the extrusion molding line as in the above embodiments, or the surface layer melting may be carried out in a device outside the line after the tube has been extruded.
このように本発明によれば、押出しされサイジ
ングされたチユーブに、更にチユーブ表面層を溶
融し冷却固化する工程を付加することにより、チ
ユーブの熱老化後の引張り伸度を著しく向上せし
めることができる。従つて本発明によれば寸法精
度も良好で、かつ高温雰囲気で長時間使用しても
すぐれた耐久性を示す熱可塑性樹脂チユーブを得
ることができる。 As described above, according to the present invention, by adding a step of melting the surface layer of the tube and cooling and solidifying it to the extruded and sized tube, the tensile elongation of the tube after heat aging can be significantly improved. . Therefore, according to the present invention, it is possible to obtain a thermoplastic resin tube that has good dimensional accuracy and exhibits excellent durability even when used for a long time in a high-temperature atmosphere.
第１図は本発明によるチユーブ製造工程説明
図、第２図および第３図はそれぞれ比較材チユー
ブおよび本発明により得られたチユーブについて
の引張り試験の結果を示す図である。
１……押出機、２……押出ヘツド、３……サイ
ジング装置、４……冷却槽、５，７……エアブロ
ー、６……高温液槽、８……冷却水槽、９……引
取り機、１０……裁断機、２０……チユーブ。
FIG. 1 is an explanatory diagram of the tube manufacturing process according to the present invention, and FIGS. 2 and 3 are diagrams showing the results of a tensile test on a comparative material tube and a tube obtained according to the present invention, respectively. 1... Extruder, 2... Extrusion head, 3... Sizing device, 4... Cooling tank, 5, 7... Air blow, 6... High temperature liquid tank, 8... Cooling water tank, 9... Taking machine , 10...cutting machine, 20...tube.
Claims (1)
程、押出しされた半溶融状態のチユーブを所定の
径の管路を通過せしめてサイジングをする工程、
サイジングされたチユーブを冷却して固化する工
程、固化されたチユーブの表面を加熱して表面層
のみを溶融させる工程、表面層のみが溶融された
チユーブを再び冷却して固化させる工程とよりな
る熱可塑性樹脂チユーブの製造方法。1. A process of extruding a thermoplastic resin into a tube shape, a process of sizing the extruded semi-molten tube by passing it through a pipe line of a predetermined diameter,
A process of cooling and solidifying the sized tube, a process of heating the surface of the solidified tube to melt only the surface layer, and a process of cooling and solidifying the tube with only the surface layer melted again. Method for manufacturing plastic resin tube.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP56096281A JPS57210831A (en) | 1981-06-22 | 1981-06-22 | Manufacture for thermoplastic resin tube |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP56096281A JPS57210831A (en) | 1981-06-22 | 1981-06-22 | Manufacture for thermoplastic resin tube |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS57210831A JPS57210831A (en) | 1982-12-24 |
| JPS647860B2 true JPS647860B2 (en) | 1989-02-10 |
Family
ID=14160729
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP56096281A Granted JPS57210831A (en) | 1981-06-22 | 1981-06-22 | Manufacture for thermoplastic resin tube |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS57210831A (en) |
Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5089204A (en) * | 1990-03-16 | 1992-02-18 | Nkk Corporation | Method of extruding thermoplastic resin pipe |
| KR100442726B1 (en) * | 2002-03-06 | 2004-08-02 | 고재권 | A products method for electric wire protect mold of stronged surface and the mold thereof |
| JP2006007754A (en) * | 2004-05-27 | 2006-01-12 | Seiko Epson Corp | Liquid transfer tube and liquid transfer tube manufacturing method |
| CN116728742B (en) * | 2023-08-09 | 2024-02-23 | 江苏乾锦塑业科技有限公司 | CPVC cable pipe inner and outer wall except that water cooling device |
-
1981
- 1981-06-22 JP JP56096281A patent/JPS57210831A/en active Granted
Also Published As
| Publication number | Publication date |
|---|---|
| JPS57210831A (en) | 1982-12-24 |
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