JPS6030260B2 - Method and device for producing thermoplastic resin plate - Google Patents
Method and device for producing thermoplastic resin plateInfo
- Publication number
- JPS6030260B2 JPS6030260B2 JP55177690A JP17769080A JPS6030260B2 JP S6030260 B2 JPS6030260 B2 JP S6030260B2 JP 55177690 A JP55177690 A JP 55177690A JP 17769080 A JP17769080 A JP 17769080A JP S6030260 B2 JPS6030260 B2 JP S6030260B2
- Authority
- JP
- Japan
- Prior art keywords
- resin
- plate
- passage
- flow
- width direction
- 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
- B29C48/305—Extrusion nozzles or dies having a wide opening, e.g. for forming sheets
-
- 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
-
- 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
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】
この発明は、熱可塑性樹脂板状体の製造方法及び装置に
関するものである。DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a method and apparatus for manufacturing a thermoplastic resin plate.
。熱可塑性樹脂の板状体を押出機を用いて製造すること
は、既に行なわれている。. The production of thermoplastic resin plates using an extruder has already been carried out.
この場合、押出機の先端に口金が付設され、樹脂が口金
を通して押出される。従って、口金は、その中に樹脂を
通過させるための貫通した通路を備えるが、この通路は
、押出機がわでは横断面が円形を呈し、出口がわでは横
断面の所望の板状を持つに至っている。その中間では、
樹脂通路は円形から板状へと徐々に変化するように構成
されている。上述のような口金を用いて樹脂板を製造す
る場合、比較的幅の狭い板を製造することは容易である
。In this case, a die is attached to the tip of the extruder, and the resin is extruded through the die. Therefore, the cap is provided with a passageway through which the resin passes, which has a circular cross-section at the extruder end and a desired plate shape in cross-section at the outlet end. It has reached this point. In the middle,
The resin passage is configured to gradually change from a circular shape to a plate shape. When manufacturing a resin plate using the above-mentioned die, it is easy to manufacture a plate with a relatively narrow width.
ところが、広幅の板状体を製造することは容易でない。
なぜならば、口金内で樹脂を板状に変化させるとき、板
の中央部では樹脂が流れ易く従って早く流れるが、板の
両端では樹脂が流れにくく従っておくれて流れるので、
樹脂を幅方向にわたって一殿に流すことが困難となるか
らである。また、この困難は、幅が広くなればなるほど
、顕著となる。そこで、従来は、口金内で幅方向全体に
わたって樹脂を一様に流すために、通路の間隙を中央程
狭く、両端に近づくほど広くして、樹脂流れの均一をは
かっていた。ところが、広狭の差を実際にどの程度の大
きさとするかが、各場合によって異なるので、現実の樹
脂流路の決定には、困難が伴つうこととなったのである
。従釆の口金は、入口と出口とを結ぶ平面に沿ってのみ
、樹脂通路を形成することが多かった。However, it is not easy to manufacture a wide plate-like body.
This is because when changing the resin into a plate shape in the nozzle, the resin flows easily in the center of the plate and therefore flows quickly, but at both ends of the plate it is difficult to flow and the resin flows slowly.
This is because it becomes difficult to flow the resin all at once across the width direction. Moreover, this difficulty becomes more pronounced as the width becomes wider. Therefore, conventionally, in order to uniformly flow the resin across the entire width within the mouthpiece, the gap between the passages was made narrower toward the center and wider toward both ends to ensure uniform flow of the resin. However, since the actual size of the width difference differs depending on the case, it has been difficult to determine the actual resin flow path. In many cases, the flange of a secondary flange forms a resin passage only along a plane connecting an inlet and an outlet.
云いかえると、従来の口金では、樹脂通路を入口と出口
とを結ぶ平面から食み出させるように、屈曲させること
は余りなかった。これは、できるだけ短かし、通路によ
って樹脂を所望の形に成形し、且つ樹脂の流れを円滑に
しようと考えていたからである。従って、このような口
金を使用する関係から、従来の成形方法では、口金の入
口と出口とを結ぶ平面から樹脂が食み出すように、口金
内で樹脂を大きく屈曲させることはなかった。もっとも
、実公昭５０−２５７３６号公報は、フラットダィにお
いて、樹脂通路を入口と出口とを結ぶ平面から僅かに食
み出させた態様を図示している。しかし、その食み出し
‘ま、チョークバーによって樹脂の流れを部分的に阻止
する目的で行われるに過ぎないから、食み出しの葛ごは
樹脂通路の厚み以上であり、しかも食み出し高さは、調
節する筈のものであるから、樹脂幅方向で特別の長さに
予じめ定めておくことを必要としない。また、実公昭５
１−５３２６２号公報も同様にＴダィにチョークバーを
設けることを記載しているが、ここではチョークバ一の
先端面を樹脂幅方向に沿ってき曲させ、中央部と両端と
を***させて中央部の両側に谷を設けることとしている
。しかし、その場合における湾曲面の高さの差は、樹脂
厚みの数分の１という程度の僅かなものである。この発
明は、上記従来の口金内において、樹旨通路を幅方向に
拡げてほぼ板状としたのち、その通路の一部に屈曲部を
設け、屈曲部では横断面形状を平板状の横断面形状にほ
ぼ一致させたまま、樹脂通路を板の平面から食み出す方
向に屈曲させ、屈曲高さを樹脂通路の厚み以上に大きく
し、その屈曲状態を樹脂流れの方向に沿った弧状に湾曲
するようにし、その後に従来の板状通路に連結するよう
にした。In other words, in conventional caps, the resin passage is rarely bent so as to protrude from the plane connecting the inlet and the outlet. This is because we wanted to make the passage as short as possible, mold the resin into a desired shape through the passage, and allow the resin to flow smoothly. Therefore, due to the use of such a die, in conventional molding methods, the resin is not bent significantly within the die so that the resin protrudes from the plane connecting the inlet and outlet of the die. However, Japanese Utility Model Publication No. 50-25736 illustrates a flat die in which the resin passage slightly protrudes from the plane connecting the inlet and the outlet. However, this protrusion is only done for the purpose of partially blocking the flow of resin with the choke bar, so the protrusion is greater than the thickness of the resin passage, and the protrusion is high. Since the length is to be adjusted, it is not necessary to predetermine a particular length in the width direction of the resin. Also, Jiko Sho 5
Publication No. 1-53262 similarly describes providing a choke bar on the T-die, but here the tip surface of the choke bar is bent along the width direction of the resin, and the center and both ends are raised. Valleys are provided on both sides of the center. However, the difference in height of the curved surfaces in that case is small, about a fraction of the resin thickness. In the present invention, in the above-mentioned conventional mouthpiece, the tree stem passage is widened in the width direction to form a substantially plate-like shape, and then a bent part is provided in a part of the passage, and the cross-sectional shape of the bent part is changed to a flat plate-like cross-sectional shape. The resin passage is bent in a direction that protrudes from the plane of the plate while keeping the shape almost the same, the bending height is made larger than the thickness of the resin passage, and the bent state is curved into an arc along the direction of resin flow. After that, it was connected to the conventional plate-shaped passage.
その結果、屈曲部における樹脂の流れの調節が容易とな
ることを知った。従って、また、目的とする板状体の幅
方向にわたって、樹脂流ねと均等化することの容易なこ
とを見出した。この発明は、このような知見に基づいて
なされたものである。この出願における製造方法の発明
は、押出機内で加熱軟化された熱可塑性樹脂を口金内に
導入し、口金の中で樹脂の横断面形状を徐々に板状に変
化させ、樹脂を板状として押出す方法において、口金内
で樹脂を幅方向に広げて板状にしたのち、板状樹脂流れ
の方向に弧状に屈曲させ、屈曲部における屈曲の高さを
幅方向の中央部で樹脂の厚み以上に大きくし両端に近づ
くほど４・さくするとともに、屈曲部における樹脂の厚
みを幅方向の中央部で薄く両端に近づくほど厚くし、そ
の後平板状にして押出すことを特徴とする、熱可塑性樹
脂板状体の製造方法に関するものである。As a result, it has been found that the flow of resin at the bend can be easily adjusted. Therefore, we have also found that it is easy to equalize the flow of the resin over the width direction of the target plate-shaped body. This invention was made based on such knowledge. The invention of the manufacturing method in this application involves introducing a thermoplastic resin heated and softened in an extruder into a die, gradually changing the cross-sectional shape of the resin into a plate shape in the die, and extruding the resin as a plate. In the dispensing method, the resin is spread in the width direction in the mouth to form a plate shape, and then the plate-shaped resin is bent in an arc shape in the direction of flow, so that the height of the bend at the bent part is equal to or greater than the thickness of the resin at the center in the width direction. A thermoplastic resin that is made larger in size and thinner as it approaches both ends, and that the thickness of the resin at the bent part is thinner in the center in the width direction and thicker as it approaches both ends, and then extruded into a flat plate shape. The present invention relates to a method for manufacturing a plate-shaped body.
また、この出願における製造方法の発明は、貫通する樹
脂通路を持ち、出口がわ通路の横断面が板状となり、入
口から出口に向って横断面形状が徐々に変化している口
金において、板状となった樹脂通路の途中に口金屈曲部
を介在させ、口金屈曲部における樹脂の通路を入口と出
口とを結ぶ平面から食み出すように弧状に屈曲させ、屈
曲の高さを幅方向の中央部において樹脂通路の厚み以上
に大きくし両端に近づくほど４・さくし、且つ樹脂通路
の厚みを幅方向の中央部において小さく両端に近づくほ
ど大きくしたことを特徴とする、熱可塑性樹脂板状体の
製造用装置である。In addition, the invention of the manufacturing method in this application is directed to a base having a penetrating resin passage, the cross section of the outlet passage being plate-shaped, and the cross-sectional shape gradually changing from the inlet to the outlet. A bent part of the mouthpiece is interposed in the middle of the shaped resin passage, and the resin passage in the bent part of the mouthpiece is bent in an arc shape so as to protrude from the plane connecting the inlet and the outlet, and the height of the bend is adjusted in the width direction. A thermoplastic resin plate-like body, characterized in that the thickness of the resin passage is larger than the thickness of the resin passage in the center part and becomes thinner as it approaches both ends, and the thickness of the resin passage is small in the central part in the width direction and increases as it approaches both ends. This is a manufacturing device.
これらの発明を図面について説明すると、つぎのとおり
である。These inventions will be explained below with reference to the drawings.
第１図は、この発明方法の一実施態様を示した水平断面
図であり、第２図は第１図のローロ線断面図である。第
３図は、第２図のｍ−ｍ線造面図である。第４図は、こ
の発明方法で用いられる他の装置の水断面図である。第
５図は、第４図のＶ−Ｖ線断面図である。第６図は、こ
の発明に係る他の口金の一部切欠断面図である。まず、
第１図ないし第３図について、装置の各部分を説明する
。FIG. 1 is a horizontal sectional view showing one embodiment of the method of the present invention, and FIG. 2 is a sectional view taken along the Rolo line of FIG. FIG. 3 is a topography view taken along line m-m in FIG. 2. FIG. 4 is a water sectional view of another apparatus used in the method of this invention. FIG. 5 is a sectional view taken along the line V-V in FIG. 4. FIG. 6 is a partially cutaway sectional view of another base according to the present invention. first,
Each part of the apparatus will be described with reference to FIGS. 1-3.
１は押出機、２はブレーカープレート、３は口金拡大部
、４は口金屈曲部、５は口金板状体である。1 is an extruder, 2 is a breaker plate, 3 is an enlarged die part, 4 is a bent die part, and 5 is a plate-like die plate.
口金屈曲部４は、雄型４１と雌型４２との組み合せから
なり、その間に屈曲遍路４３が形成されている。雌型４
２は、樹脂通路の壁となるところに横断面が弧状の窪み
面を備え、窪み面の両端には側板４５及び４６を備えて
いる。雄型４１は、蒲鉾状の突出部４４を備え、突出部
４４を雄型４２の窪み面と対向させ、雄型４１の両端を
側板４５及び４６と密接させて、雌型４２に固定される
。こうして、雄型４１と雌型４２との間に屈曲通路４３
が形成される。蒲鉾状の突出部４４は、第３図に示すよ
うに、樹脂通路の幅方向の断面が中央部において高く、
両端に近づくに従って次第に低くなっている。The bent part 4 is made up of a combination of a male mold 41 and a female mold 42, and a bent path 43 is formed between them. female type 4
2 is provided with a recessed surface having an arcuate cross section at the portion that becomes the wall of the resin passage, and side plates 45 and 46 are provided at both ends of the recessed surface. The male die 41 is provided with a semicircular protrusion 44, and is fixed to the female die 42 with the protrusion 44 facing the recessed surface of the male die 42 and with both ends of the male die 41 in close contact with the side plates 45 and 46. . In this way, a bending passage 43 is formed between the male die 41 and the female die 42.
is formed. As shown in FIG. 3, the semicylindrical protrusion 44 has a cross section in the width direction of the resin passage that is high at the center.
It gradually becomes lower as it approaches both ends.
その結果、屈曲の高さは樹脂通路の幅方向中央部で最も
大きく、両端に近づくほど小さくなり、幅方向の断面は
ゆるやかな弧状を呈している。また、樹脂の流れ方向断
面では、突出部４４が、第２図に示すように、樹脂通路
の厚み以上に大きく突出し、半円に近いような小円弧状
を呈している。他方、雌型４２の窪み面は、上述のよう
に、横断面形状が弧状に湾曲しているが、長手方向の断
面では殆んど一直線状に延びて、湾曲していない。そこ
で、雌型４２の窪み面に雄型４１の突出部４４を対向さ
せて固定すると、窪み面と突出部４４との間に弧状に湾
曲した屈曲通路４３が形成される。屈曲通路４３は、両
側にある側板４５及び４６に接する部分で間隙が最も大
きく、中央部に近づくに従って間隙が狭くなっている。
口金屈曲部４の先端がわには、口金板状体５が接続され
ている。As a result, the height of the bend is greatest at the center in the width direction of the resin passage, and decreases as it approaches both ends, so that the cross section in the width direction has a gentle arc shape. In addition, in the cross section in the flow direction of the resin, the protruding portion 44 protrudes to a greater extent than the thickness of the resin passage, and has a small arc shape that is close to a semicircle, as shown in FIG. On the other hand, as described above, the recessed surface of the female die 42 has an arcuate cross-sectional shape, but extends almost linearly in a longitudinal cross-section and is not curved. Therefore, when the protruding part 44 of the male mold 41 is fixed to the recessed surface of the female mold 42 so as to face each other, an arcuate curved passage 43 is formed between the recessed surface and the protruding part 44. The bending passage 43 has the largest gap at a portion where it contacts the side plates 45 and 46 on both sides, and the gap becomes narrower as it approaches the center.
A base plate-like body 5 is connected to the tip of the base bent portion 4 .
口金板状体５は、得ようとする板横断面の通路を備えて
いる。その通路は、先に行くほど僅かながら狭くなるよ
うに形成されている。この通路は、口金屈曲部４の通路
と連なる。それら通路の継ぎ副ま、隙間や段差を構成し
ないよう、滑かな面により連結されている。口金屈曲部
４の後端がわには、口金拡大部３が接続される。The base plate body 5 is provided with a passage having the cross section of the plate to be obtained. The passage is formed so that it becomes slightly narrower as it goes further. This passage is continuous with the passage of the base bent portion 4. The joints of these passages are connected by smooth surfaces so that there are no gaps or steps. The base enlarged part 3 is connected to the rear end of the base bent part 4 .
口金拡大部３は、その中に通路３１を備えているが、通
路３１の横断面は、押出機１がわで円形を呈し、屈曲部
４がわで偏平な板状を呈し、その中間では円形から板状
へと徐々に変化している。通路３１は、屈曲部４がわで
屈曲通路４３と連なるが、その通路の継ぎ目は、隙間や
段差を構成しないよう、滑から面により連結されている
。この発明の口金は、口金拡大部３と口金板状部５との
間に、口金屈曲部４を介在させている点に特徴をもって
いる。The enlarged mouth part 3 has a passage 31 therein, and the cross section of the passage 31 has a circular shape at the extruder 1, a flat plate shape at the bent part 4, and a flat plate in the middle. It gradually changes from a circular shape to a plate shape. The passage 31 is connected to the bent passage 43 at the bent part 4, and the joint between the passages is connected by a smooth surface so as not to form a gap or a step. The cap of the present invention is characterized in that a cap bent portion 4 is interposed between the cap enlarged portion 3 and the cap plate-like portion 5.
すなわち、口金拡大部３と口金板状部５とを直接接続し
た構造の口金は、従釆から知られていた。ところが、こ
の口金では口金屈曲部４が介在するため、樹脂通路が口
金拡大部３内で幅方向に広げられ、一旦板状となったの
ち、樹脂通路が、４内で板ろ厚み方向に屈曲され、流れ
る方向に沿って円弧状に屈曲して進行せしめられ、その
後に再び平板状になり、この状態で開□することとなる
。第１図ないし、第３図に示した例では、押出機１内で
加熱軟化された熱可塑性樹脂が、ブレーカープレート２
を経てのち、口金拡大部３内で一日板状に拡大される。That is, a cap having a structure in which the cap enlarged portion 3 and the cap plate-like portion 5 are directly connected has been known from the past. However, in this mouthpiece, since the mouthpiece bending part 4 is interposed, the resin passage is widened in the width direction within the mouthpiece expansion part 3 and once becomes plate-shaped, the resin passageway is bent in the plate thickness direction within the mouthpiece expansion part 3. It is bent in an arc shape along the flow direction, and then it becomes flat again, and in this state it opens. In the examples shown in FIGS. 1 to 3, the thermoplastic resin heated and softened in the extruder 1 is transferred to the breaker plate 2.
After that, it is expanded into a plate shape within the cap expansion section 3 for one day.
このとき、通路３１の中心部を進行する樹脂は流れやす
いが、幅方向の両端を進行する樹脂は流れにくい。そこ
で、通路の中心部の厚みを小さくし、通路の両端ほど厚
みを大きくして、流れの均一化をはかる。この点では従
来行なわれて来た方法をそのまま採用する。しかし、こ
の発明方法では、口金拡大部３の先端で樹脂流れの均一
を完全に果たさなくともよい点が異なつている。一般に
、口金拡大部３の先端で樹脂流れの幅方向における均一
化を完全に果たすことは、実際には非常に困難である。At this time, the resin traveling through the center of the passage 31 flows easily, but the resin traveling along both widthwise ends has difficulty flowing. Therefore, the thickness at the center of the passage is made small, and the thickness is increased toward both ends of the passage in order to make the flow uniform. In this respect, the conventional method is adopted as is. However, the method of this invention is different in that the resin flow does not have to be completely uniform at the tip of the enlarged mouth portion 3. Generally, it is actually very difficult to completely equalize the flow of resin in the width direction at the tip of the enlarged mouth portion 3.
とくに、両端の樹脂は、中央の樹脂に比べて斜めに進行
するため、進行距離が長くなるから、進行がおくれるこ
とになり、全体を一様に進めることができない。従って
、口金拡大部３を出た樹脂を口金板状部５に直ちに導い
たのでは、上述の進行のおくれをそのまま存続させるこ
とになる。口金屈曲部４では、屈曲通路４３が樹脂通路
の幅方向の両端ほど間隙を大きくしているから、樹脂は
両端ほど進行しやすくなっている。In particular, since the resin at both ends advances obliquely compared to the resin at the center, the traveling distance is longer, so the progress is delayed, and the entire resin cannot advance uniformly. Therefore, if the resin exiting the enlarged mouth part 3 were immediately guided to the plate-like part 5 of the mouthpiece, the above-described delay in progress would continue. In the bent portion 4 of the mouthpiece, the gap between the bent passage 43 is made larger toward both ends of the resin passage in the width direction, so that the resin progresses more easily toward both ends.
このため、口金拡大部３において両端ほど進行し‘こく
かつたことや屈曲通路４３内で補正され、樹脂は幅方向
に一様に進行することとなる。さらに、屈曲通路４・３
では、突出部４４が両端において低く中央部において高
くなっているので、樹脂の進行方向に沿って通路の長さ
が、平均して両端ほど短かく、中央ほど長くなる。その
ため、両端の樹脂が屈曲通路４３を短時間に通過し、中
央の樹脂が屈曲通路を長時間要して通過することとなる
。従って、拡大部３の通路３１を通過することにより、
進行がお〈れてし、た両端の樹脂は、屈曲通路４３の通
過により進行のお〈れが取戻され、押出機１を同時に出
た樹脂が、中央部を両端も一様に並んで口金板状部５内
へ進行することとなる。かくして、樹脂の流れが均等化
されて、口金板状部５内へ進行することとなる。このた
め、口金板状部５から幅方向に一様な板として押出され
る。この発明方法によれば、口金内で広幅に拡大された
樹脂が、幅方向の両端で流れにくくなるとともにおくれ
て進んでいたところ、口金屈曲部４の通路４３内におい
て屈曲され、屈曲高が幅方向の中央部で樹脂の厚み以上
に大きくされているから、広い幅にわたって樹脂の流れ
を容易に調節することができる。For this reason, the fact that the resin progresses toward both ends in the enlarged mouth portion 3 is corrected in the bending passage 43, and the resin progresses uniformly in the width direction. Furthermore, bending passages 4 and 3
In this case, since the protrusion 44 is low at both ends and high at the center, the length of the passage along the resin traveling direction is on average shorter at both ends and longer at the center. Therefore, the resin at both ends passes through the bending passage 43 in a short time, and the resin at the center takes a long time to pass through the bending passage. Therefore, by passing through the passage 31 of the enlarged part 3,
The resin at both ends, whose progress has slowed, is regained its progress by passing through the bending passage 43, and the resin that has exited the extruder 1 at the same time is uniformly lined up in the center at both ends. It will proceed into the base plate-like portion 5. In this way, the flow of the resin is equalized and advances into the base plate portion 5. Therefore, it is extruded from the base plate-like portion 5 as a uniform plate in the width direction. According to the method of this invention, the resin expanded to a wide width within the mouthpiece becomes difficult to flow at both ends in the width direction and advances slowly, but it is bent in the passage 43 of the bent part 4 of the mouthpiece, and the height of the bending is reduced to the width. Since the thickness of the resin is greater than the thickness of the resin at the center of the direction, the flow of the resin can be easily adjusted over a wide width.
また、屈曲高を幅方向の中央部で大きくし両端に近づく
ほど小さくするとともに、屈曲部における樹脂の厚みを
幅方向の中央部で薄く両端に近づくほど厚くしたから、
樹脂は中央部を通過するに長時間を要するとともに流れ
にくくなり、両端を通過するに短時間で足りるとともに
流れやすくなり、従って両端が流れにくくお〈れて進ん
でいたのが回復され、中央部と均斉化される。従って、
口金板状部５から樹脂を一様な平板状のものとして押出
すことが容易となる。しかも、流れ抵抗は、突出部４４
の突出によって与えられるから、その突出部４４の突出
度合を変えるだけで抵抗を変化させることができるので
、流れの均等化が容易である。また、通路は屈曲してい
るので、必然的にそれだけ通路が長くなり、従って口金
の全体の長さを延長しないで流れの均一化をはかりやす
い利点がある。また、この発明の口金によれば、板状と
なった樹脂通路の途中に口金屈曲部を介在させることと
したので、口金屈曲部を外して樹脂通路の調整を容易に
することができる。In addition, the bending height is increased at the center in the width direction and becomes smaller toward both ends, and the thickness of the resin at the bend is thinner at the center in the width direction and thicker toward both ends.
The resin takes a long time to pass through the center and becomes difficult to flow, but it takes a short time to pass through both ends and becomes easy to flow. and equalized. Therefore,
It becomes easy to extrude the resin from the cap plate-shaped portion 5 in the form of a uniform flat plate. Moreover, the flow resistance is reduced by the protrusion 44
Since the resistance is given by the protrusion of the protrusion 44, the resistance can be changed simply by changing the degree of protrusion of the protrusion 44, so it is easy to equalize the flow. Further, since the passage is curved, the passage is inevitably longer, and therefore there is an advantage that it is easier to equalize the flow without increasing the overall length of the cap. Further, according to the base of the present invention, since the base bent portion is interposed in the middle of the plate-shaped resin passage, the resin passage can be easily adjusted by removing the base bent portion.
また、口金屈曲部では、樹脂通路を入口と出口とを結ぶ
平面から食み出すように弧状に屈曲させ、屈曲を高さを
幅方向の中央部において樹脂通路の厚み以上に大きくし
たから、樹脂の流れる方向における口金の長さをかほど
延長しないで、広い幅にわたって樹脂の流れを容易に調
節するこをができる。さらに、屈曲高を幅方向の中央部
において大きく両端に近づすほど小さくし、且つ樹脂通
路の厚みを幅方向の中央部において小さく両端に近づく
ほど大きくしたので、樹脂は中央部を長時間を要して流
れるとともに流れにくくなり、両端を通過するに短時間
で足りるとともに流れやすくなり、従って両端が流れに
くくておくれて進んでいたのが回復され、中央部と均斉
化される。とくに口金屈曲部は、雄型と雌型とで構成し
、雄型は蒲鉾状の突出部４４によって樹脂通路を規制す
るようにすれば、蒲鉾状突出部４４の突出度合にを調節
することによって、容易に樹脂流れに与える抵抗を加減
することができる。従って、この発明の口金は樹脂の流
れの均斉化を自在に調節できる点で有利なものである。
この発明方法及び口金は、第１図及び第３図に示したよ
うに、一つの口金屈曲部４を含むものに限らない。In addition, in the bending part of the cap, the resin passage is bent in an arc shape so as to protrude from the plane connecting the inlet and outlet, and the height of the bend is made larger than the thickness of the resin passage at the center in the width direction. The flow of resin can be easily adjusted over a wide width without significantly increasing the length of the mouthpiece in the flow direction. Furthermore, the bending height is large at the center in the width direction and becomes smaller as it approaches both ends, and the thickness of the resin passage is made smaller at the center in the width direction and becomes larger as it approaches both ends, so the resin lasts for a long time in the center. In short, as it flows, it becomes difficult to flow, and it only takes a short time to pass through both ends, and it becomes easy to flow, so that the flow that had been kept at both ends with difficulty is recovered, and it becomes equalized with the center. In particular, if the bending part of the cap is made up of a male mold and a female mold, and the male mold restricts the resin passage by a semicylindrical protrusion 44, the degree of protrusion of the semicylindrical protrusion 44 can be adjusted. , the resistance to resin flow can be easily adjusted. Therefore, the base of the present invention is advantageous in that the uniformity of the resin flow can be adjusted freely.
The method and the mouthpiece of the present invention are not limited to the one including one bent part 4 of the mouthpiece as shown in FIGS. 1 and 3.
第４図及び第５図に示したように、口金屈曲部４にさら
にもう一つの口金屈曲部６を蓮設したものであってもよ
い。２つの口金屈曲部４及び６を含む場合には、それぞ
れの屈曲通路４３及び６３は、板状の樹脂通路に対して
互いに反対がわに突出するようにすることが望ましい。
このようにすると、樹脂流れの均一化効果が一層顕著と
なる。第４図及び第５図では、２つの口金屈曲部４及び
６をべつべつに作成したが、これは一体に作全してもよ
い。As shown in FIGS. 4 and 5, the base bent part 4 may be further provided with another base bent part 6. When two bent portions 4 and 6 are included, it is desirable that the respective bent passages 43 and 63 protrude on opposite sides of the plate-shaped resin passage.
In this way, the effect of uniformizing the resin flow becomes even more remarkable. In FIGS. 4 and 5, the two base bent portions 4 and 6 are made separately, but they may be made entirely in one piece.
また、屈曲部における突出部は、これを取り外しに便利
なようにすることが望ましい。例えば、第６図に示すよ
うに、蒲鉾状突出部４４を半円状機材４７と一体にし、
この一体物を雄型４１の一部として交換自在にすること
が望まし‐し、。この発明方法は、発泡剤を含まない熱
可塑性樹脂の押出にも使用できるが、とくに発泡剤を含
んだ熱可塑性樹脂の押出において、効果が顕著である。It is also desirable that the protrusion at the bend be convenient for removal. For example, as shown in FIG.
It is desirable that this integrated body be made replaceable as part of the male mold 41. Although the method of this invention can be used for extruding thermoplastic resins that do not contain blowing agents, it is particularly effective in extruding thermoplastic resins that contain blowing agents.
なぜならば、非発泡の樹脂では内部と表皮部との不均一
が余り目立たないが、発泡体では局部的不均一が気泡の
大小粗密となって現れるからであり、この発明の口金を
用い、この発明方法によって発泡体とすると、内部も表
皮部も一様に発泡したものが容易に得られるからである
。This is because, with non-foamed resin, non-uniformity between the interior and the skin is not so noticeable, but with foam, local non-uniformity appears as the size and density of the bubbles. This is because when a foam is made by the method of the invention, it is easy to obtain a foam that is uniformly foamed both inside and on the skin.
第１図は、この発明方法の一実施態様を示した水平断面
図である。
第２図は、第１図のローロ線断面図である。第３図は、
第２図のｍ−ｍ線断面図である。第４図は、この発明方
法に用いられる他の装置の水平断面図である。第５図は
、第４図のＶ−Ｖ線断面図である。第６図は、この発明
に係る他の口金の一部切欠断面図である。第１図
第２図
第３図
第４図
第５図
第６図FIG. 1 is a horizontal sectional view showing one embodiment of the method of the present invention. FIG. 2 is a sectional view taken along the Rolo line in FIG. 1. Figure 3 shows
FIG. 3 is a sectional view taken along line mm in FIG. 2; FIG. 4 is a horizontal sectional view of another apparatus used in the method of this invention. FIG. 5 is a sectional view taken along the line V-V in FIG. 4. FIG. 6 is a partially cutaway sectional view of another base according to the present invention. Figure 1 Figure 2 Figure 3 Figure 4 Figure 5 Figure 6
Claims (1)
入し、口金の中で樹脂の横断面形状を徐々に板状に変化
させ、樹脂を板状として押出す方法において、口金内で
樹脂を幅方向に広げて板状にしたのち、板状樹脂流を流
れの方向に弧状に屈曲の高さを幅方向の中央部で樹脂の
厚み以上に大きくし両端に近づくほど小さくするととも
に、屈曲部における樹脂の厚みを幅方向の中央部で薄く
両端に近づくほど厚くし、その後平板状にして押出すこ
とを特徴とする、熱可塑性樹脂板状体の製造方法。 ２ 屈曲部における樹脂の流れ方向に沿つた通路の長さ
を幅方向の中央部で大きく両端に近づくほど小さくした
、特許請求の範囲第１項に記載する熱可塑性樹脂板状体
の製造方法。 ３ 板状樹脂流の屈曲を板状体平面の一方の側で行つた
のち、引続き板状体平面の他方の側で対称的に樹脂流の
屈曲を行い、その後に平板状として押出す、特許請求の
範囲第１項に記載する熱可塑性樹脂板状体の製造方法。 ４ 貫通する樹脂通路を持ち、出口がわ通路の横断面が
板状となり、入口から出口に向つて横断面形状が徐々に
変化している口金において、板状となよた樹脂通路の途
中に口金屈曲部を介在させ、口金屈曲部における樹脂の
通路を入口と出口とを結ぶ平面から食み出すように弧状
に屈曲させ、屈曲の高さを樹脂通路の幅方向中央部にお
いて樹脂通路の厚み以上に大きくし両端に近づくほど小
さくし、且つ樹脂通路の厚みを幅方向の中央部において
小さく両端に近づくほど大きくしたことを特徴とする、
熱可塑性樹脂板状体の製造装置。５ 口金屈曲部が雄型
と雌型とで構成され、雌型には樹脂流れの方向に弧状に
弯曲する窪み面を形成し、雄型には蒲鉾状の突出部を設
け、窪み面内に突出面を対向させて雄型と雌型とを固定
し、雌型の窪み面と蒲鉾状の突出部との間に弧状に弯曲
する樹脂通路を設けた、特徴請求の範囲第４項に記載す
る装置。 ６ 蒲鉾状の突出部が樹脂流れと垂直な方向の中央部で
高く、両端に近づくに従つて次第に低くなり、雌型の窪
み面の樹脂流れ方向の断面が樹脂流れに垂直な方向にわ
たつてほぼ同様になつている、特徴請求の範囲第５項に
記載する装置。[Claims] 1. A method in which a thermoplastic resin heated and softened in an extruder is introduced into a die, the cross-sectional shape of the resin is gradually changed into a plate shape in the die, and the resin is extruded as a plate. , After the resin is spread in the width direction in the mouthpiece to form a plate shape, the plate-shaped resin flow is bent in an arc shape in the flow direction so that the height of the bend is greater than the thickness of the resin at the center of the width direction, and the closer it gets to both ends. A method for manufacturing a thermoplastic resin plate, which comprises reducing the thickness of the resin at the bent portion, making the resin thinner at the center in the width direction and thickening toward both ends, and then extruding the resin into a flat plate. 2. The method for manufacturing a thermoplastic resin plate according to claim 1, wherein the length of the passage along the flow direction of the resin in the bent portion is large at the center in the width direction and becomes smaller as it approaches both ends. 3 Patent for bending a plate-shaped resin flow on one side of the plane of the plate-shaped body, then bending the resin flow symmetrically on the other side of the plane of the plate-shaped body, and then extruding it as a flat plate. A method for manufacturing a thermoplastic resin plate according to claim 1. 4. In a cap that has a resin passage that penetrates, the cross section of the passage near the outlet is plate-shaped, and the cross-sectional shape gradually changes from the inlet to the outlet. A bent part of the mouthpiece is interposed, and the resin passage in the bent part of the mouthpiece is bent in an arc so as to protrude from the plane connecting the inlet and the outlet, and the height of the bend is equal to the thickness of the resin passageway at the center in the width direction of the resin passageway. The thickness of the resin passage is larger at the central part in the width direction and becomes larger as it approaches both ends.
Manufacturing equipment for thermoplastic resin plate bodies. 5 The bending part of the mouthpiece is composed of a male die and a female die, the female die has a concave surface curved in an arc in the direction of resin flow, the male die is provided with a semicircular protrusion, and the concave surface has a concave surface. The male mold and the female mold are fixed with their protruding surfaces facing each other, and an arcuate resin passage is provided between the recessed surface of the female mold and the semicylindrical protrusion, according to claim 4. device to do. 6 The semicylindrical protrusion is high at the center in the direction perpendicular to the resin flow, and gradually becomes lower as it approaches both ends, so that the cross section of the female recessed surface in the resin flow direction extends in the direction perpendicular to the resin flow. Apparatus according to claim 5, characterized in that it is substantially similar.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP55177690A JPS6030260B2 (en) | 1980-12-15 | 1980-12-15 | Method and device for producing thermoplastic resin plate |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP55177690A JPS6030260B2 (en) | 1980-12-15 | 1980-12-15 | Method and device for producing thermoplastic resin plate |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS57100032A JPS57100032A (en) | 1982-06-22 |
| JPS6030260B2 true JPS6030260B2 (en) | 1985-07-15 |
Family
ID=16035396
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP55177690A Expired JPS6030260B2 (en) | 1980-12-15 | 1980-12-15 | Method and device for producing thermoplastic resin plate |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS6030260B2 (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS60153165U (en) * | 1984-03-21 | 1985-10-12 | 柴田 英伸 | Golf equipment wooden putter manufacturing method |
| US11799119B2 (en) | 2018-09-07 | 2023-10-24 | Ngk Insulators, Ltd. | Manifold, cell stack device, and electrochemical cell |
Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FR2697774B1 (en) * | 1992-11-10 | 1994-12-23 | Albert Plastiques | Flat die for the extrusion of plastic film, sheet or plate. |
| US5516273A (en) * | 1994-09-06 | 1996-05-14 | Minnesota Mining And Manufacturing Company | Die for extruding a fluid stream |
| US5750159A (en) * | 1996-06-24 | 1998-05-12 | Minnesota Mining & Manufacturing Company | Die for extruding one or more fluid streams |
| ITUB20152878A1 (en) * | 2015-08-05 | 2017-02-05 | Cannon Spa | Method, device and apparatus for dispensing polyurethane mixtures |
-
1980
- 1980-12-15 JP JP55177690A patent/JPS6030260B2/en not_active Expired
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS60153165U (en) * | 1984-03-21 | 1985-10-12 | 柴田 英伸 | Golf equipment wooden putter manufacturing method |
| US11799119B2 (en) | 2018-09-07 | 2023-10-24 | Ngk Insulators, Ltd. | Manifold, cell stack device, and electrochemical cell |
Also Published As
| Publication number | Publication date |
|---|---|
| JPS57100032A (en) | 1982-06-22 |
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