JPH08118456A - Control of temperature of end part of t-die mold - Google Patents
Control of temperature of end part of t-die moldInfo
- Publication number
- JPH08118456A JPH08118456A JP6265370A JP26537094A JPH08118456A JP H08118456 A JPH08118456 A JP H08118456A JP 6265370 A JP6265370 A JP 6265370A JP 26537094 A JP26537094 A JP 26537094A JP H08118456 A JPH08118456 A JP H08118456A
- Authority
- JP
- Japan
- Prior art keywords
- plate
- resin
- mold
- die
- temperature
- 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.)
- Pending
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
- B29C48/03—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
- B29C48/07—Flat, e.g. panels
- B29C48/08—Flat, e.g. panels flexible, e.g. 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
- B29C48/92—Measuring, controlling or regulating
-
- 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
- B29C2948/00—Indexing scheme relating to extrusion moulding
- B29C2948/92—Measuring, controlling or regulating
- B29C2948/92504—Controlled parameter
- B29C2948/92704—Temperature
-
- 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
- B29C2948/00—Indexing scheme relating to extrusion moulding
- B29C2948/92—Measuring, controlling or regulating
- B29C2948/92819—Location or phase of control
- B29C2948/92857—Extrusion unit
- B29C2948/92904—Die; Nozzle zone
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Extrusion Moulding Of Plastics Or The Like (AREA)
Abstract
Description
【０００１】[0001]
【産業上の利用分野】本発明は合成樹脂シ−トを押出成
形によって製造する場合に使用するＴダイ金型端部の温
度制御方法に関するものである。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for controlling the temperature of the end portion of a T-die die used when a synthetic resin sheet is manufactured by extrusion molding.
【０００２】[0002]
【従来の技術】合成樹脂シ−トの押出成形法は、カレン
ダ−加工、プレス加工等に較べ、プロセスが連続的であ
り、製造能率に優れ、加工工程の簡素化を図り得る等の
有利性があり、近来、合成樹脂シ−トの製造方法の主流
となっている。2. Description of the Related Art Extrusion molding methods for synthetic resin sheets are advantageous in that they have a continuous process, are excellent in manufacturing efficiency, and can simplify the processing steps as compared with calendering, pressing, etc. In recent years, it has become the mainstream of synthetic resin sheet manufacturing methods.
【０００３】この押出成形法によって合成樹脂シ−トを
製造するには、押出機のＴダイ金型から押し出されてく
るシ−ト状樹脂をポリシングロ−ルに通して艶出しを行
い、ポリシングロ−ルから出てくるシ−ト状樹脂を走行
ロ−ル群で移送し、この移送中に自然冷却又は強制冷却
等によって冷却固化し、冷却固化したシ−ト状樹脂を引
取りロ−ルで引き取り、この引取り位置の直前または直
後において、シ−ト状樹脂の巾両端部をそれぞれスリッ
タ−でトリミングしている。In order to manufacture a synthetic resin sheet by this extrusion molding method, a sheet-shaped resin extruded from a T-die die of an extruder is passed through a polishing roll to polish and polish. The sheet-like resin that comes out of the roll is transferred by a traveling roll group, and during this transfer, it is cooled and solidified by natural cooling or forced cooling, and the sheet-like resin that has been cooled and solidified is collected and rolled. Just before or immediately after this take-up position, both ends of the width of the sheet-shaped resin are trimmed by slitters.
【０００４】図５の（イ）は上記Ｔダイ金型の縦断面図
を、図５の（ロ）並びに図５の（ハ）は図５の（イ）に
おけるロ−ロ断面図並びにハ−ハ断面図をそれぞれ示し
ている。FIG. 5 (a) is a vertical cross-sectional view of the T-die die, and FIG. 5 (b) and FIG. 5 (c) are roll cross-sectional views and halves in FIG. 5 (a). C cross-sectional views are shown.
【０００５】図５の（イ）乃至図５の（ハ）において、
ａ’は上金型を、ｂ’は下金型を、２６’は断面が円形
の樹脂流入路を、２３'は断面が涙滴形のＴ型マニホ−
ルドを、２４'は平行間隙流路を、２５'はチョ−クバ−
をそれぞれ示し、Ｔ型マニホ−ルド２３'の涙滴形断面
は、分流路末端に至るほど長さ並びに半円形部径が次第
に小とされている。８１’，８１’は金型両側面におい
て、上下金型間の平行間隙流路の巾両端を閉ざすために
取付けられたサイドピ−ス〔図５の（ニ）にも示すよう
に、上下の金型ａ’，ｂ’にボルト８２’，…で取付け
られている）を、７’はサイドピ−ス８１’の長手方向
中空孔に挿入された棒状ヒ−タを、７６’はサイドピ−
ス８１’に取付けられたサ−モカップルをそれぞれ示し
ている。In FIGS. 5 (a) to 5 (c),
a'is an upper mold, b'is a lower mold, 26 'is a resin inflow path having a circular cross section, and 23' is a T-shaped manifold having a teardrop-shaped cross section.
, 24 'is a parallel gap flow path, 25' is a choke bar.
In the teardrop-shaped cross section of the T-shaped manifold 23 ', the length and the diameter of the semicircular portion are gradually reduced toward the end of the branch channel. 81 'and 81' are side pieces attached on both sides of the mold to close both ends of the width of the parallel gap flow path between the upper and lower molds [as shown in (d) of FIG. Are attached to the molds a ', b'with bolts 82', ..., 7'is a rod-shaped heater inserted in the longitudinal hollow hole of the side piece 81 ', and 76' is a side piece.
Each of the thermocouples attached to the space 81 'is shown.
【０００６】図５の（イ）並びに図５の（ロ）におい
て、押出機のバレルより樹脂流入路２６'に送入された
樹脂が、マニホ−ルド２３’により金型の巾両端に向け
流動され、更に、このマニホ−ルド２３’の途中の各位
置ににおいて、その位置での平行間隙流路部分の長さに
比例する流動抵抗に応じその平行間隙流路部分を経て直
線流れ（金型軸方向流れ）で流動されていく。In FIGS. 5A and 5B, the resin fed from the barrel of the extruder into the resin inflow path 26 'flows toward both ends of the width of the mold by the manifold 23'. Further, at each position in the middle of the manifold 23 ', a linear flow (metal mold) is passed through the parallel gap flow passage portion in accordance with the flow resistance proportional to the length of the parallel gap flow passage portion at that position. Axial flow).
【０００７】また、平行間隙流路面に対するチョ−クバ
−２５’の突出量の調節により、チョ−クバ−直下の流
路間隙厚みが調整されて、樹脂流量の微調整が行われ
る。上記において、溶融樹脂をマニホ−ルド２３’によ
り金型の巾両端に向け流動させ、平行間隙流路での樹脂
流量を巾方向に一様とすることが合成樹脂シ−ト厚の均
一化のために不可欠である。Further, by adjusting the protrusion amount of the choke bar 25 'with respect to the parallel gap flow passage surface, the thickness of the flow passage gap immediately below the choke bar is adjusted to finely adjust the resin flow rate. In the above, the molten resin is made to flow toward both ends of the width of the mold by the manifold 23 'to make the resin flow rate in the parallel gap flow path uniform in the width direction. Is essential for.
【０００８】この場合、マニホ−ルド２３’により金型
の巾両端に向け溶融樹脂を流動させる以上、巾中央部に
較べ巾端部の樹脂圧が高くなることは避けられず、この
ために巾端部への溶融樹脂の廻り込み量が不足するよう
なことになれば、上記シ−ト厚の均一化を達成できない
ので、巾端部の樹脂を上記サイドピ−ス内の棒状ヒ−タ
によって加熱し巾端部での樹脂の流動性を調整して、シ
−ト全巾にわたっての厚みの均一化を図っている。In this case, since the molten resin is made to flow toward both ends of the width of the mold by the manifold 23 ', it is unavoidable that the resin pressure at the end of the width becomes higher than that at the center of the width. If the amount of molten resin wrapping around at the end becomes insufficient, the sheet thickness cannot be made uniform, so the resin at the end of the width is removed by a rod-shaped heater in the side piece. By heating and adjusting the fluidity of the resin at the width end, the thickness is made uniform over the entire width of the sheet.
【０００９】[0009]
【発明が解決しようとする課題】しかしながら、上記の
棒状ヒ−タと平行間隙流路側面との間は、かなりの距離
で隔てられており〔図５の（ハ）を参照〕、棒状ヒ−タ
発生熱の樹脂への熱伝達にそれだけ長い時間遅れが生
じ、金型側面全体を均一に加熱し難いために、樹脂流路
での巾方向の流れ調整が困難になり、上記巾端部の樹脂
の肉厚調整に時間がかかる（従って、肉厚調整されない
ままで押出しが進めら、不良部分の長さが長くなる）、
また、端部樹脂を高速で加熱するためにヒ−タ発熱温度
を高くすれば、端部樹脂の炭化・劣化が生じ易い、等の
不利がある。However, the rod-shaped heater and the side surface of the parallel gap flow path are separated by a considerable distance [see (c) in FIG. 5], and the rod-shaped heater is formed. The heat transfer to the resin by the generated heat is delayed by that much, and it is difficult to uniformly heat the entire side surface of the mold, making it difficult to adjust the flow in the width direction in the resin flow path. It takes time to adjust the resin thickness (thus, if extrusion proceeds without adjusting the thickness, the length of the defective part will increase),
Further, if the heater heat generation temperature is raised in order to heat the end resin at high speed, there is a disadvantage that carbonization and deterioration of the end resin easily occur.
【００１０】また、棒状ヒ−タにおいては、熱流束が熱
源を中心とする放射状流束であって距離に反比例し、２
点間の距離が僅かであってもその２点間の温度差が大き
く異なるために、上記端部樹脂の温度とサ−モカップル
温度との差が大きく、精密な樹脂温度制御も困難であ
る。In the rod-shaped heater, the heat flux is a radial flux centered on the heat source and is inversely proportional to the distance.
Even if the distance between the points is small, the temperature difference between the two points is greatly different, so that the difference between the temperature of the end resin and the thermocouple temperature is large, and precise resin temperature control is also difficult.
【００１１】従って、上記の巾端部樹脂の高精度の温度
制御が困難であり、巾端部樹脂の無炭化・劣化を保証し
難い。上記したように、合成樹脂シ−トの押出製造にお
いては、シ−ト状樹脂の巾両端部を最終の製造段階でト
リミングしているが、巾端部樹脂の無炭化を保証し難い
以上、トリミング片を樹脂材原料として再使用するには
問題がある。Therefore, it is difficult to control the temperature of the width end resin with high accuracy, and it is difficult to guarantee the non-carbonization and deterioration of the width end resin. As described above, in the extrusion manufacturing of the synthetic resin sheet, the width ends of the sheet-shaped resin are trimmed in the final manufacturing stage, but it is difficult to guarantee the non-carbonization of the width end resin, There is a problem in reusing a trimming piece as a resin material raw material.
【００１２】本発明の目的は、Ｔダイ金型で樹脂をシ−
ト状に押出し、該シ−ト状樹脂をポリシングロ−ル、移
送ロ−ルを経て引取りロ−ルで引き取ると共に引取りロ
−ルの直前又は直後の位置にてシ−ト状樹脂の両縁端部
をトリミングする場合、シ−ト巾端部に対する金型内で
の樹脂の温度制御を高精度で行い、そのシ−ト巾端部の
無炭化を保証し、トリミング片を樹脂材原料として安全
に再使用することを可能にするＴダイ金型端部の温度制
御方法を提供することにある。An object of the present invention is to seal resin with a T-die mold.
The sheet-shaped resin is extruded into a sheet-like shape, and the sheet-shaped resin is taken up by a take-up roll through a polishing roll and a transfer roll, and at the position immediately before or after the take-up roll. When trimming the edges of both edges, the temperature of the resin in the mold with respect to the edge of the sheet width is controlled with high accuracy to ensure that the edge of the sheet width is not carbonized and the trimming piece is made of resin material. An object of the present invention is to provide a temperature control method for the end portion of a T-die mold that enables safe reuse as a raw material.
【００１３】[0013]
【課題を解決するための手段】本発明に係るＴダイ金型
端部の温度制御方法は、上下金型間にマニホ−ルドを有
するＴダイ金型の側面に、上下金型に跨って通電加熱式
の板状ヒ−タを添設し、これらの板状ヒ−タにより上記
Ｔダイ金型内樹脂の巾端部の温度制御を行うことを特徴
とする構成であり、上下金型の各側面に押え枠を取着
し、ボルトを螺挿した外板、押え板並びに板状ヒ−タを
上記上下金型の押え枠内に収め、上記ボルトによって外
板と押え板との間隔を拡げ外板を押え枠に押し付けると
共に押え板で板状ヒ−タを押え付けることにより、板状
ヒ−タの添設を行うことが好ましい。According to the method of controlling the temperature of an end portion of a T-die mold according to the present invention, a side surface of the T-die mold having a manifold between the upper and lower molds is energized across the upper and lower molds. A heating type plate-shaped heater is additionally provided, and the temperature of the width end of the resin in the T-die mold is controlled by these plate-shaped heaters. The press frame is attached to each side, and the outer plate with the bolts inserted, the press plate and the plate-shaped heater are housed in the press frame of the upper and lower molds, and the bolt separates the space between the outer plate and the press plate. It is preferable to attach the plate-shaped heater by pressing the spreading outer plate against the pressing frame and pressing the plate-shaped heater with the pressing plate.
【００１４】[0014]
【作用】Ｔダイ金型の各側面に板状ヒ−タを添設してい
るから、従来の棒状ヒ−タ使用の場合に較べて、ヒ−タ
を樹脂に熱的に充分に近接させ得、板状ヒ−タの発生熱
を平行間隙流路の巾端部の樹脂に迅速に伝達させること
ができ、巾端部樹脂の板状ヒ−タによる温度制御を迅速
に行うことができる。Since a plate-shaped heater is attached to each side of the T-die mold, the heater is placed sufficiently close to the resin thermally compared to the case where a conventional rod-shaped heater is used. As a result, the heat generated by the plate-shaped heater can be quickly transferred to the resin at the width end of the parallel gap flow path, and the temperature of the resin at the width end can be quickly controlled by the plate-shaped heater. .
【００１５】また、板状ヒ−タから金型側面に向かう熱
流束が平行流束であり、板状ヒ−タから距離が多少異な
っても、その距離の範囲内における箇所の温度の差を充
分に小さくでき、巾端部樹脂が板状ヒ−タからある範囲
内（L0〜L0＋ΔL）にあり、サ−モカップルの先端位置
がこの範囲内（L0〜L0＋ΔL）の何れかの点位置にある
とすると、巾端部樹脂の温度とサ−モカップル先端温度
とを充分に等しくできるから、サ−モカップル先端温度
による温度制御で端部樹脂温度を充分に正確に制御でき
る。Further, the heat flux from the plate-shaped heater to the side surface of the mold is a parallel flux, and even if the distance from the plate-shaped heater is slightly different, the temperature difference at the location within the range of the distance is It can be made sufficiently small, and the resin at the width end is within a certain range (L 0 to L 0 + ΔL) from the plate heater, and the tip position of the thermocouple is within this range (L 0 to L 0 + ΔL). At that point, since the temperature of the width end resin and the thermocouple tip temperature can be made sufficiently equal, the temperature control by the thermocouple tip temperature can control the edge resin temperature sufficiently accurately.
【００１６】[0016]
【実施例】以下、図面により本発明の実施例を説明す
る。図１の（イ）は合成樹脂シ−トの押出製造ラインの
一例を示す上面説明図、図１の（ロ）は同じく側面説明
図である。Embodiments of the present invention will be described below with reference to the drawings. FIG. 1A is a top explanatory view showing an example of a synthetic resin sheet extrusion production line, and FIG. 1B is a side explanatory view of the same.
【００１７】図１の（イ）並びに図１の（ロ）におい
て、１は合成樹脂押出機であり、Ｔダイ金型２を備えて
いる。３はポリシングロ−ルであり、Ｔダイ金型の直後
に配設されている。４，…は移送ロ−ル群、５は引取り
ロ−ルであり、引取りロ−ル５とポリシングロ−ル３と
の間隔は、ポリシングロ−ル３からのシ−ト状樹脂を、
この間で冷却・固化し得るように設定されている。In FIG. 1A and FIG. 1B, 1 is a synthetic resin extruder equipped with a T-die die 2. 3 is a polishing roll, which is arranged immediately after the T-die mold. 4, ... Is a transfer roll group, 5 is a take-up roll, and the distance between the take-up roll 5 and the polishing roll 3 is the sheet-like resin from the polishing roll 3. ,
It is set so that it can be cooled and solidified during this period.
【００１８】６，６はトリミング用のスリッタ−であ
り、引取りロ−ル５の直前位置のシ−ト状樹脂の両縁端
に設けられている。このトリミング用のスリッタ−は、
引取りロ−ル５の直後の位置に設けることもできる。Numerals 6 and 6 are trimming slitters, which are provided at both edges of the sheet-shaped resin immediately before the take-up roll 5. This slitter for trimming is
It can also be provided immediately after the take-up roll 5.
【００１９】図２は上記のＴダイ金型２を示している。
図２において、２１ａは上金型本体、２２ａは上リップ
であり、上金型本体２１ａにボルト（図示されていな
い）により連結されている。２１ｂは下金型本体、２２
ｂは下リップであり、下金型本体２１ｂにボルト（図示
されていない）により連結されている。２３は上下金型
間に設けられたＴ型マニホ−ルド溝、２４は平行間隙流
路、２５はチヨ−クバ−、２６はＴ型マニホ−ルド２３
への樹脂供給流路である。FIG. 2 shows the T-die mold 2 described above.
In FIG. 2, 21a is an upper mold body and 22a is an upper lip, which are connected to the upper mold body 21a by bolts (not shown). 21b is a lower mold body, 22
Reference numeral b denotes a lower lip, which is connected to the lower mold body 21b by a bolt (not shown). 23 is a T-shaped manifold groove provided between the upper and lower molds, 24 is a parallel gap flow path, 25 is a chuck bar, and 26 is a T-shaped manifold 23
It is a resin supply flow path to.
【００２０】上記において、上下金型は樹脂供給流路２
６の両側のパ−ティング面で接し、この接触部でボルト
（図示されていない）により相互に締結されている。上
記において、Ｔダイ金型２における平行間隙流路２４の
巾両端は、金型側面に開放されており、この側面での上
下金型間のギャップを閉成するように板状ヒ−タ７が取
付けられている。In the above, the upper and lower molds are the resin supply channel 2
6 are in contact with each other at their surface to be joined, and at this contact portion, they are fastened to each other by bolts (not shown). In the above, both ends of the width of the parallel gap flow path 24 in the T die mold 2 are open to the side surface of the mold, and the plate-shaped heater 7 is formed so as to close the gap between the upper and lower molds on this side surface. Is installed.
【００２１】図３の（イ）は本発明において使用する板
状ヒ−タの取付け構造の一例を示している。図３の
（イ）において、ａは上金型（上金型本体２１ａと上リ
ップ２２ａとから成る）、ｂは下金型（下金型本体２１
ｂと下リップ２２ｂとから成る）、７１は各上下金型に
溶接等により取着された押え枠である。７２は熱良伝導
性の平滑内板（例えば、アルミニウム板）、７は板状ヒ
−タ、７３は押え板、７４は外板、７５は外板７４に螺
挿されたボルトであり、これらの部材が押え枠７１，７
１内に収容され、ボルト７５の回転で押え板７３と外板
７４との間隔が広げられ、外板７４が押え枠７１，７１
に押し付けられると共に板状ヒ−タ７並びに内板７２が
押え板７３で金型側面に押付けられている。７６は板状
ヒ−タ近傍の金型部位に取付けられたサ−モカップルで
ある。FIG. 3A shows an example of a plate-shaped heater mounting structure used in the present invention. In (a) of FIG. 3, a is an upper die (consisting of an upper die body 21a and an upper lip 22a), and b is a lower die (lower die body 21).
b) and the lower lip 22b), and 71 are holding frames attached to the upper and lower molds by welding or the like. 72 is a smooth inner plate having good thermal conductivity (for example, an aluminum plate), 7 is a plate-shaped heater, 73 is a holding plate, 74 is an outer plate, and 75 is a bolt screwed into the outer plate 74. The members of the holding frame 71, 7
It is accommodated in the first housing 1, and the space between the holding plate 73 and the outer plate 74 is widened by the rotation of the bolt 75, so that the outer plate 74 is held by the holding frames 71, 71.
The plate-shaped heater 7 and the inner plate 72 are pressed against the side surface of the mold by the pressing plate 73. Reference numeral 76 is a thermocouple attached to a mold part near the plate-shaped heater.
【００２２】上記板状ヒ−タの取付け構造において、上
記ボルト７５は、図３の（ロ）に示されているように、
外板７４の長手方向に間隔を隔てた少なくとも２ヵ所に
螺挿されている。In the plate-shaped heater mounting structure, the bolts 75 are, as shown in FIG.
The outer plate 74 is screwed into at least two places spaced apart in the longitudinal direction.
【００２３】図３の（イ）に示すように、平行間隙流路
２４内の樹脂圧に対する内板７２や板状ヒ−タ７等の固
定安定性を高めるために、ボルト７５のセット位置は平
行間隙流路２４の位置に一致させることが好ましい。As shown in FIG. 3A, in order to enhance the fixing stability of the inner plate 72, the plate-shaped heater 7 and the like against the resin pressure in the parallel gap flow path 24, the setting position of the bolt 75 is set. It is preferable to match the position of the parallel gap channel 24.
【００２４】上記板状ヒ−タには、通電により加熱面が
一様温度で発熱される面状発熱体が使用され、例えば、
セラミックス板の片面に膜抵抗を形成し、この膜抵抗面
上にガラスコ−ト等の絶縁層を被覆したもの、ニッケル
−クロム系合金等の高抵抗金属板にガラスコ−ト等の絶
縁層を被覆したもの等が使用される。For the plate-shaped heater, there is used a sheet heating element whose heating surface generates heat at a uniform temperature when energized.
A ceramic plate with a film resistance formed on one side and a glass coat or other insulating layer coated on the film resistance surface, or a nickel-chromium alloy or other high resistance metal plate coated with a glass coat or other insulating layer. Those that have been used are used.
【００２５】上記押え板７３には、熱絶縁性のものを使
用することが好ましい。本発明によりＴダイ金型端部の
温度を制御しつつ、合成樹脂シ−トを押出製造するに
は、図１の（イ）並びに（ロ）において、Ｔダイ金型２
で樹脂をシ−ト状に押出し、このシ−ト状樹脂をポリシ
ングロ−ル３、移送ロ−ル４，…を経て引取りロ−ル５
で引き取ると共に引取りロ−ル５の直前又は直後の位置
にてスリッタ−６，６でシ−ト状樹脂の巾両端部をトリ
ミングしていく。It is preferable to use a heat insulating material for the pressing plate 73. According to the present invention, in order to extrude and manufacture a synthetic resin sheet while controlling the temperature of the end portion of the T-die mold, the T-die mold 2 is used in (a) and (b) of FIG.
The resin is extruded into a sheet by means of the sheet-like resin, and the sheet-like resin is taken through the polishing roll 3, the transfer rolls 4 ,.
At the same time as the take-up roll 5, the both ends of the width of the sheet-like resin are trimmed by the slitters 6 and 6 immediately before or after the take-up roll 5.
【００２６】この場合、Ｔダイ金型２から押出されてく
るシ−ト状樹脂の端部に偏肉が発生すると、Ｔダイ金型
内の平行間隙流路の巾端部の樹脂温度を樹脂に応じて予
め定めた所定の温度（Ｔ0）に調節し、その樹脂の流動
性を調整して偏肉調整を行わなければならない。In this case, when the sheet-shaped resin extruded from the T-die die 2 has an uneven thickness at the end portion, the resin temperature at the width end portion of the parallel gap flow path in the T-die die is set to the resin temperature. Therefore, it is necessary to adjust the temperature to a predetermined temperature (T 0 ) determined in advance and adjust the fluidity of the resin to adjust the uneven thickness.
【００２７】而して、本発明に係るＴダイ金型端部の温
度制御方法においては、図３の（イ）に示すように上記
板状ヒ−タ７近傍の金型部位に取付けたサ−モカップ７
６の温度を上記所定温度（Ｔ0）にするように、サ−モ
カップの電気出力を検出信号として制御する。このサ−
モカップ温度とＴダイ金型内の平行間隙流路の巾端部の
樹脂温度との差は、前記した通り僅小にできるから、同
巾端部の樹脂温度を正確に制御でき、かつ、前記した通
り、迅速に制御できる。Thus, in the temperature control method for the end portion of the T-die mold according to the present invention, as shown in FIG. -Mocup 7
The electric output of the thermocup is controlled as a detection signal so that the temperature of 6 becomes the above-mentioned predetermined temperature (T 0 ). This server
Since the difference between the mocup temperature and the resin temperature at the width end of the parallel gap flow path in the T-die mold can be made small as described above, the resin temperature at the width end can be accurately controlled, and As you did, you can control it quickly.
【００２８】本発明において、金型側面への板状ヒ−タ
の取付けは、樹脂の粘着・滞留を防止して板状ヒ−タを
金型側面に熱的に近接させ得る構成であれば、適宜の構
成を使用できる。例えば、図４に示すように、熱良伝導
性の平滑内板７２と板状ヒ−タ７とをサイドピ−ス８１
とボルト８２とにより金型側面に取付けることもでき
る。この場合、サイドピ−ス８１と板状ヒ−タ７との間
に断熱シ−ト（フッ素樹脂シ−ト）を介在させることが
好ましい。In the present invention, the plate-shaped heater is attached to the side surface of the mold as long as the plate-shaped heater can be thermally brought close to the side surface of the mold by preventing adhesion and retention of the resin. , An appropriate configuration can be used. For example, as shown in FIG. 4, a smooth inner plate 72 having good thermal conductivity and a plate-shaped heater 7 are connected to a side piece 81.
It can also be attached to the side surface of the mold by means of and bolts 82. In this case, it is preferable to interpose a heat insulating sheet (fluorine resin sheet) between the side piece 81 and the plate-shaped heater 7.
【００２９】[0029]
【発明の効果】本発明に係るＴダイ金型端部の温度制御
方法によれば、Ｔダイ金型で樹脂をシ−ト状に押出し、
該シ−ト状樹脂をポリシングロ−ル、移送ロ−ルを経て
引取りロ−ルで引き取ると共に引取りロ−ルの直前又は
直後の位置にてシ−ト状樹脂の両縁端部をトリミングす
る場合、金型側面のヒ−タによる樹脂の温度制御を高精
度で行うことができ、従って、トリミング前のシ−ト状
樹脂の両端部の無炭化を保証でき、炭化の無いトリミン
グ片を発生させ得るから、このトリミング片を樹脂材原
料として好適に再利用できる。According to the method of controlling the temperature of the end portion of the T-die mold according to the present invention, the resin is extruded into a sheet by the T-die mold,
The sheet-like resin is taken up by a take-up roll after passing through a polishing roll and a transfer roll, and both edge portions of the sheet-like resin are removed at positions immediately before or after the take-up roll. When trimming, it is possible to control the temperature of the resin with a heater on the side of the mold with high accuracy, and thus it is possible to guarantee that both ends of the sheet-shaped resin before trimming are not carbonized, and there is no carbonization. Therefore, the trimming piece can be suitably reused as a resin material raw material.
【００３０】特に、図３に示す板状ヒ−タの取付構造を
使用する場合は、ボルトの操作で、板状ヒ−タの金型へ
の着脱を極めて簡単に行うことができる。In particular, when the plate-shaped heater mounting structure shown in FIG. 3 is used, the plate-shaped heater can be attached to and detached from the mold very easily by operating the bolt.
【図１】図１の（イ）は本発明によりＴダイ金型端部の
温度制御を行う合成樹脂シ−トの押出製造ラインを示す
平面図、図１の（ロ）は同じく側面図である。FIG. 1A is a plan view showing an extrusion production line of a synthetic resin sheet for controlling the temperature of a T-die die end according to the present invention, and FIG. 1B is a side view of the same. is there.
【図２】図１の押出製造装置におけるＴダイ金型を示す
説明図である。FIG. 2 is an explanatory view showing a T-die mold in the extrusion manufacturing apparatus of FIG.
【図３】本発明において使用するＴダイ金型における板
状ヒ−タ取付構造の一例を示す説明図、図３の（ロ）は
同じく板状ヒ−タ等の部材を示す説明図である。FIG. 3 is an explanatory view showing an example of a plate-shaped heater mounting structure in a T-die mold used in the present invention, and FIG. 3B is an explanatory view showing members such as the plate-shaped heater. .
【図４】本発明において使用するＴダイ金型における板
状ヒ−タ取付構造の別例を示す説明図である。FIG. 4 is an explanatory view showing another example of the plate-shaped heater mounting structure in the T-die mold used in the present invention.
【図５】図５の（イ）は、合成樹脂シ−トの押出製造に
使用されている従来のヒ−タ付Ｔダイ金型を示す説明
図、図５の（ロ）は図５の（イ）におけるロ−ロ断面
図、図５の（ハ）は図５の（イ）におけるハ−ハ断面
図、図５の（ニ）は同Ｔダイ金型の側面を示す説明図で
ある。5 (a) is an explanatory view showing a conventional T-die die with a heater used for extrusion production of synthetic resin sheets, and FIG. 5 (b) is FIG. 5 is a sectional view taken along the line (a), FIG. 5 (c) is a sectional view taken along the line of FIG. 5 (a), and FIG. 5 (d) is an explanatory view showing a side surface of the T-die mold. .
２ Ｔダイ金型 ３ ポリシングロ−ル ４ 移送ロ−ル ５ 引取りロ−ル ６ トリミングスリッタ− ７ 板状ヒ−タ ７１ 押え枠 ７２ 押え板 ７４ 外板 2 T-die mold 3 Polishing roll 4 Transfer roll 5 Take-up roll 6 Trimming slitter 7 Plate-shaped heater 71 Holding frame 72 Holding plate 74 Outer plate
Claims (2)
金型の側面に、上下金型に跨って通電加熱式の板状ヒ−
タを添設し、該板状ヒ−タにより上記Ｔダイ金型内樹脂
の巾端部の温度制御を行うことを特徴とするＴダイ金型
端部の温度制御方法。1. A T-die mold having a manifold between the upper and lower molds, on the side surface of a T-die mold, a plate-shaped heater of an electric heating type extending over the upper and lower molds.
A method for controlling the temperature of the end portion of the T-die die by controlling the temperature of the width end portion of the resin in the T-die die by using the plate-shaped heater.
トを螺挿した外板、押え板並びに板状ヒ−タを上記上下
金型の押え枠内に収め、上記ボルトで外板と押え板との
間隔を拡げて外板を押え枠に押し付けると共に押え板で
板状ヒ−タを押え付けることにより、板状ヒ−タの添設
を行う請求項１記載のＴダイ金型端部の温度制御方法。2. A press frame is attached to each side of the upper and lower molds, and an outer plate, a press plate and a plate-shaped heater, into which bolts are screwed, are housed in the press frames of the upper and lower molds, and the The T-die according to claim 1, wherein the plate-shaped heater is attached by expanding the distance between the outer plate and the pressing plate, pressing the outer plate against the pressing frame, and pressing the plate-shaped heater with the pressing plate. Method for controlling the temperature of the mold edge.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP6265370A JPH08118456A (en) | 1994-10-28 | 1994-10-28 | Control of temperature of end part of t-die mold |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP6265370A JPH08118456A (en) | 1994-10-28 | 1994-10-28 | Control of temperature of end part of t-die mold |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH08118456A true JPH08118456A (en) | 1996-05-14 |
Family
ID=17416244
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP6265370A Pending JPH08118456A (en) | 1994-10-28 | 1994-10-28 | Control of temperature of end part of t-die mold |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH08118456A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2006341510A (en) * | 2005-06-09 | 2006-12-21 | Fujifilm Holdings Corp | Thermoplastic film and its manufacturing method |
-
1994
- 1994-10-28 JP JP6265370A patent/JPH08118456A/en active Pending
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2006341510A (en) * | 2005-06-09 | 2006-12-21 | Fujifilm Holdings Corp | Thermoplastic film and its manufacturing method |
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