JPH04107008U - Die structure of sheet rubber extrusion dryer - Google Patents
Die structure of sheet rubber extrusion dryerInfo
- Publication number
- JPH04107008U JPH04107008U JP1991015024U JP1502491U JPH04107008U JP H04107008 U JPH04107008 U JP H04107008U JP 1991015024 U JP1991015024 U JP 1991015024U JP 1502491 U JP1502491 U JP 1502491U JP H04107008 U JPH04107008 U JP H04107008U
- Authority
- JP
- Japan
- Prior art keywords
- die
- outlet
- cross
- extrusion dryer
- rubber
- 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.)
- Granted
Links
- 238000010070 extrusion (rubber) Methods 0.000 title claims description 5
- 229920001971 elastomer Polymers 0.000 claims abstract description 20
- 239000005060 rubber Substances 0.000 claims abstract description 20
- 238000001125 extrusion Methods 0.000 claims abstract description 11
- 238000001035 drying Methods 0.000 description 3
- 230000000694 effects Effects 0.000 description 2
- 238000004806 packaging method and process Methods 0.000 description 2
- 229920003051 synthetic elastomer Polymers 0.000 description 2
- 239000005061 synthetic rubber Substances 0.000 description 2
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 2
- 208000031481 Pathologic Constriction Diseases 0.000 description 1
- 238000004364 calculation method Methods 0.000 description 1
- 238000004140 cleaning Methods 0.000 description 1
- 230000000052 comparative effect Effects 0.000 description 1
- 230000006835 compression Effects 0.000 description 1
- 238000007906 compression Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000006116 polymerization reaction Methods 0.000 description 1
- 208000037804 stenosis Diseases 0.000 description 1
- 230000036262 stenosis Effects 0.000 description 1
- 230000007704 transition Effects 0.000 description 1
Landscapes
- Processing And Handling Of Plastics And Other Materials For Molding In General (AREA)
- Extrusion Moulding Of Plastics Or The Like (AREA)
Abstract
(57)【要約】
【目的】 二軸スクリュー押出乾燥機により、断面がほ
ぼ長方形でスクリューシリンダー部の幅より広い広幅の
乾燥ゴムシートを得る。
【構成】 ダイ出口における溶融ゴムの圧力を４〜２０
kg／cm2に保持するように規定されたダイ出口断面積を
有し、ダイの長円形入口／長方形出口の横幅比を１．５
〜２．５とし、ダイ整流部縦狭窄角度を９〜３０度と
し、かつダイ出口断面形状を長方形両端を外側に円形又
は楕円形膨出形状とする。
(57) [Summary] [Purpose] To obtain a wide dried rubber sheet with a nearly rectangular cross section and a width wider than the screw cylinder part using a twin-screw extrusion dryer. [Configuration] The pressure of molten rubber at the die exit is set to 4 to 20
kg/cm 2 and a die oblong inlet/rectangular outlet width ratio of 1.5.
2.5, the vertical constriction angle of the die rectifier is 9 to 30 degrees, and the cross-sectional shape of the die exit is a rectangle with both ends outwardly bulging into a circular or elliptical shape.
Description
【０００１】0001
本考案は、シート状に合成ゴムを押し出し乾燥する二軸スクリュー型押出乾燥 機のダイの構造に関するものである。 This invention is a twin-screw type extrusion dryer that extrudes synthetic rubber into a sheet and dries it. This relates to the structure of the die of the machine.
【０００２】0002
合成ゴムシートの製造法において、重合液から凝固水洗したゴムをシート状乾 燥品とするのに多品種生産に効率のよい二軸スクリュー型押出乾燥機が多用され ている。この乾燥機は水洗された凝固ゴムをスクリュー前半部で圧縮脱水し、後 半部で加熱混練して溶融し、乾燥後ダイからシート状に押し出すものである。乾 燥ゴムシートは、ダイを出て横幅が収縮し厚みを増大する。現在までのところ、 ダイ出口幅が二軸押出乾燥機スクリューのシリンダーの横幅以上のものは得られ ていない。このため、乾燥シートの幅は押出機の大きさに制限され、包装袋に２ 列にして入れるなど、包装，取扱が面倒であり、広幅の製品が強く要望されてい る。 広幅シートが得られない理由としては、ダイの横幅を広くすると、ダイの流れ 方向，垂直方向にゴムの滞留が生じ易く、またダイ清掃が困難である，さらに製 品断面形状が二軸押出機特有のメガネ状となるなどのためである。 In the manufacturing method of synthetic rubber sheets, rubber that has been solidified and washed with water from a polymerization solution is dried in the form of a sheet. The highly efficient twin-screw extrusion dryer is often used to produce dried products in a wide variety of products. ing. This dryer compresses and dehydrates the coagulated rubber that has been washed with water in the front half of the screw. The half part is heated and kneaded to melt it, and after drying, it is extruded into a sheet form from a die. dry After exiting the die, the dried rubber sheet shrinks in width and increases in thickness. Until now, It is not possible to obtain a die outlet width that is greater than the cylinder width of the twin-screw extrusion dryer screw. Not yet. For this reason, the width of the dryer sheet is limited by the size of the extruder, and the width of the dryer sheet is limited by the size of the extruder. Packaging and handling are cumbersome, such as placing them in rows, and there is a strong demand for wide products. Ru. The reason why wide sheets cannot be obtained is that when the width of the die is widened, the flow of the die is Rubber tends to accumulate in the direction and vertical direction, and cleaning the die is difficult. This is because the cross-sectional shape of the product becomes a spectacle-like shape that is unique to a twin-screw extruder.
【０００３】0003
考案者は、広幅乾燥シートを得るため、上記問題点の解決法について研究し、 ダイにおける溶融ゴム流動性には、そのダイ部における溶融ゴム圧力と滞留時間 が密接な関係があることを見いだし、及び押出製品の断面形状については、乾燥 品形状を補償できるようなダイ断面形状とすればよいことを着想し、試験研究を 重ね本考案を完成するに至った。 The inventor researched ways to solve the above problems in order to obtain a wide drying sheet. The fluidity of molten rubber in a die depends on the molten rubber pressure and residence time in the die. It was found that there is a close relationship between the We came up with the idea of creating a die cross-sectional shape that could compensate for the product shape, and conducted testing and research. This led to the completion of this idea.
【０００４】0004
本考案によれば、ゴムシート用二軸押出乾燥機において、ダイ出口における溶 融ゴムの圧力を４〜２０kg／cm2に保持するように規定されたダイ出口断面積を 有し、ダイの長円形入口／長方形出口の横幅比を１．５〜２．５とし、ダイ整流 部縦狭窄角度を９〜３０度とし、かつダイ出口長方形両端を外側に円形又は楕円 形膨出形状としたことを特徴とするシート状ゴム押出乾燥機のダイ構造が提供さ れる。According to the present invention, a twin-screw extrusion dryer for rubber sheets has a die exit cross-sectional area defined to maintain the pressure of molten rubber at the die exit at 4 to 20 kg/ cm2 , and the die has an oval shape. The width ratio of the inlet/rectangular outlet is 1.5 to 2.5, the vertical constriction angle of the die rectifying part is 9 to 30 degrees, and both ends of the die outlet rectangle are bulged outward in a circular or elliptical shape. A die structure for a sheet rubber extrusion dryer is provided.
【０００５】 即ち、ダイ出口断面積を縮小して、出口部における必要な溶融ゴムの圧力を保 有させ流動性を保持せしめるとともに、二軸押し出しスクリューの先端とダイ出 口までに滞留時間を持つことにより、押出後のシートの断面形状が平たい長方形 状になるようにダイの断面形状を規定したものである。[0005] In other words, the cross-sectional area of the die exit is reduced to maintain the necessary pressure of the molten rubber at the exit. In addition to maintaining fluidity, the tip of the twin screw extrusion screw and the exit of the die are Due to the residence time before the extrusion, the cross-sectional shape of the sheet after extrusion is flat and rectangular. The cross-sectional shape of the die is defined so that it has a shape.
【０００６】 本考案実施例を図面に基いて説明すると、図１はダイの斜視図で、図２はダイ の中心線を含む縦断面図，図３は中心線を含む水平断面図で、図４はダイ出口の 正面図である。溶融ゴムを所期の広幅形状に押し出すためには、ダイ出口部の溶 融ゴムの圧力は４kg／cm2〜２０kg／cm2であることが必要で、４kg／cm2未満で は溶融ゴムの流動性が低く押出シートの両側部が薄く凹凸のある厚みとなる形状 欠損を生じ、２０kg／cm2を超えると圧縮が強すぎ、押出し後のシートが凹凸の ある膨出形状となるとともに押出機の消費動力が増大し好ましくない。 ダイ入口(1)の断面形状は横長の長円形で、ダイ出口(2)の形状は横長の特定形 状の長方形である。長円形断面積は乾燥機内のスクリュー軸の大きさ、二軸スク リューの噛み合わせ等により決められる。この入口の長円形断面積から、ダイ出 口における溶融ゴムの圧力を所定圧力に保持するのに必要な出口断面積が計算に より決定される。 ダイの長円形入口と長方形出口の横幅比は、長円形長径の長さの１．５倍以上 で２．５倍以下である。１．５倍未満では幅広とする効果が充分ではない。２． ５倍以下とすることが良好な押出形状を保持するために必要で、これ以上では焼 き付け等を起こす虞がある。出口長辺の長さを定めることにより、先の断面積か ら短辺の高さが計算で求められる。An embodiment of the present invention will be explained based on the drawings. FIG. 1 is a perspective view of a die, FIG. 2 is a vertical sectional view including the center line of the die, and FIG. 3 is a horizontal sectional view including the center line. 4 is a front view of the die outlet. In order to extrude the molten rubber into the desired wide shape, the pressure of the molten rubber at the exit of the die must be between 4 kg/cm 2 and 20 kg/cm 2 , and if it is less than 4 kg/cm 2 , the fluidity of the molten rubber will decrease. If the pressure exceeds 20 kg/cm 2 , the compression becomes too strong and the extruded sheet becomes uneven and bulged, resulting in consumption of the extruder. The power increases, which is not desirable. The cross-sectional shape of the die inlet (1) is a horizontally long oval, and the shape of the die outlet (2) is a horizontally long, specific-shaped rectangle. The oval cross-sectional area is determined by the size of the screw shaft in the dryer, the meshing of the twin screws, etc. From this oval cross-sectional area of the inlet, the exit cross-sectional area required to maintain the pressure of the molten rubber at a predetermined pressure at the die exit is determined by calculation. The width ratio of the oval inlet and rectangular outlet of the die is 1.5 times or more and 2.5 times or less the length of the oval long diameter. If it is less than 1.5 times, the effect of widening the width is not sufficient. 2. It is necessary to make it 5 times or less in order to maintain a good extruded shape, and if it is more than this, there is a risk of burning etc. By determining the length of the long side of the outlet, the height of the short side can be calculated from the cross-sectional area.
【０００７】 次に、ダイの縦方向狭窄角度（θ）は、９度〜３０度の範囲で用いられ、１１ 度〜１８度の範囲が好ましい。ここに、縦方向狭窄角度（θ）とは、図２のダイ 中心を通る縦断面図における内壁面の傾斜角度を指称するものとする。９度未満 では整流部の長さが必要以上に長過ぎ、取扱い上不適当であり、３０度を超える と絞りが強すぎ溶融ゴムの流れが悪くなり、好ましくない。 ダイは入口側，出口側とそれぞれ、独立して熱媒体管路を設けて加熱できるよ うにし、溶融ゴムのダイ部における温度降下を防止し、必要な流動性を確保して いる。 また、ダイ出口の断面形状は、図４に例示す横長長方形の両端部を側方に膨出 した円状、又は楕円状にすることが必要で、これにより、側端部における厚み不 足を補償し、所定厚みを持ったほぼ均厚の長方形断面形状のシートを確保するこ とができる。膨出形状は長方形部端から外側に厚みの１．８〜２．５倍凸出し、 直径が厚みの２倍程度の円形または短軸長さが厚みの２倍程度の楕円形に滑らか に移行した形状とすることが好ましい。[0007] Next, the vertical constriction angle (θ) of the die is used in the range of 9 degrees to 30 degrees, and 11 A range of 18 degrees to 18 degrees is preferred. Here, the longitudinal constriction angle (θ) is the die shown in Fig. 2. It refers to the inclination angle of the inner wall surface in a longitudinal cross-sectional view passing through the center. less than 9 degrees In this case, the length of the rectifying section is longer than necessary, making it unsuitable for handling, and the length exceeds 30 degrees. If the squeezing is too strong, the flow of the molten rubber will be poor, which is not desirable. The die can be heated by providing separate heat medium pipes on the inlet and outlet sides. This prevents the temperature drop of the molten rubber at the die part and ensures the necessary fluidity. There is. In addition, the cross-sectional shape of the die exit is a horizontally long rectangle with both ends bulging out to the side, as shown in Figure 4. It is necessary to make it into a circular or elliptical shape, which allows for uniform thickness at the side edges. To compensate for the feet and secure a sheet with a rectangular cross-section of approximately uniform thickness and a predetermined thickness. I can do that. The bulging shape protrudes outward from the edge of the rectangular part by 1.8 to 2.5 times the thickness. Smooth circular shape with diameter approximately twice the thickness or oval shape with short axis length approximately twice the thickness It is preferable that the shape transitions to .
【０００８】 本考案に使用した二軸押出乾燥機の実施例について説明すると、押出機はダイ 入口長円長軸径１８７mm，短軸径１０１mmで、出口圧力５kg／cm2とし、シート 幅をダイ入り口の２倍に選定し、整流部の縦狭窄角度（θ）を１５度とした。 このようにダイの各部寸法を規定したダイを用いることにより、所期の乾燥レ ートで幅広の乾燥ゴムシートを得ることができた。得られた乾燥シートのシート 幅は２９０mmで、その断面形状を図５に示す。 比較のため同一押出機を用いて、ダイ出口圧力１kg／cm2、出口断面形状を両 端部を丸めた長方形としたダイによるものの断面形状を図６に示す。図に示す如 く、両端部に行くにつれて薄くなり、複数枚の積み重ねは自動包装は勿論、手作 業による包装も困難であった。[0008]Explaining an example of the twin-screw extrusion dryer used in the present invention, the extruder has a die entrance oval with a long axis diameter of 187 mm, a short axis diameter of 101 mm, an outlet pressure of 5 kg/cm 2 , and a sheet width of It was selected to be twice as large as the entrance, and the vertical constriction angle (θ) of the rectifying part was set to 15 degrees. By using a die with the dimensions of each part of the die defined in this way, a wide dried rubber sheet could be obtained at the desired drying rate. The width of the obtained dry sheet was 290 mm, and its cross-sectional shape is shown in FIG. For comparison, FIG. 6 shows the cross-sectional shape of a die using the same extruder with a die outlet pressure of 1 kg/cm 2 and a rectangular outlet cross-sectional shape with rounded ends. As shown in the figure, it becomes thinner toward both ends, making it difficult to stack a plurality of sheets not only automatically but also manually.
【０００９】[0009]
本考案によれば、従来困難であった二軸押出乾燥機による幅広シートの押し出 しを可能とし、包装、輸送、取扱い等に益するところ大なるものがある。 According to this invention, it is possible to extrude wide sheets using a twin-screw extrusion dryer, which was previously difficult. It has great benefits for packaging, transportation, handling, etc.
【００１０】0010
【図１】本考案に係るシート状ゴム押出乾燥機用ダイの
斜視図である。FIG. 1 is a perspective view of a die for a sheet rubber extrusion dryer according to the present invention.
【図２】ダイの中心線を通る縦断面図である。FIG. 2 is a longitudinal cross-sectional view through the centerline of the die.
【図３】ダイの中心線を通る水平断面図である。FIG. 3 is a horizontal cross-sectional view through the centerline of the die.
【図４】ダイの出口正面図である。FIG. 4 is a front view of the exit of the die.
【図５】実施例による押出シートの断面形状を示す図面
である。FIG. 5 is a drawing showing a cross-sectional shape of an extruded sheet according to an example.
【図６】比較例による押出シートの断面形状を示す図面
である。FIG. 6 is a drawing showing the cross-sectional shape of an extruded sheet according to a comparative example.
１ ダイ入口 ２ ダイ出口 θ 縦狭窄角度 1 Die entrance 2 Die exit θ Vertical stenosis angle
Claims (2)
イ出口における溶融ゴムの圧力を４〜２０kg／cm2に保
持するように規定されたダイ出口断面積を有し、ダイの
長円形入口／長方形出口の横幅比を１．５〜２．５と
し、ダイ整流部縦狭窄角度を９〜３０度とし、かつダイ
出口長方形両端を外側に円形又は楕円形膨出形状とした
ことを特徴とするシート状ゴム押出乾燥機のダイ構造。Claim 1: A twin-screw extrusion dryer for rubber sheets, which has a die outlet cross-sectional area defined to maintain the pressure of molten rubber at the die outlet at 4 to 20 kg/cm 2 , and an oblong inlet of the die. / The width ratio of the rectangular outlet is 1.5 to 2.5, the vertical constriction angle of the die rectification part is 9 to 30 degrees, and both ends of the rectangular die outlet are outwardly bulged in a circular or elliptical shape. Die structure of sheet rubber extrusion dryer.
れ独立して加熱される構造としたことを特徴とする請求
項１記載のシート状ゴム押出乾燥機のダイ構造。2. The die structure for a sheet rubber extrusion dryer according to claim 1, wherein the blocks on the inlet side and the outlet side of the die are each heated independently.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1991015024U JP2520238Y2 (en) | 1991-02-25 | 1991-02-25 | Die structure of sheet rubber extrusion dryer |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1991015024U JP2520238Y2 (en) | 1991-02-25 | 1991-02-25 | Die structure of sheet rubber extrusion dryer |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH04107008U true JPH04107008U (en) | 1992-09-16 |
| JP2520238Y2 JP2520238Y2 (en) | 1996-12-11 |
Family
ID=31902360
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP1991015024U Expired - Lifetime JP2520238Y2 (en) | 1991-02-25 | 1991-02-25 | Die structure of sheet rubber extrusion dryer |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2520238Y2 (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2020055243A (en) * | 2018-10-03 | 2020-04-09 | 住友ゴム工業株式会社 | Die plate and rubber extruder |
| JP2020055242A (en) * | 2018-10-03 | 2020-04-09 | 住友ゴム工業株式会社 | Die plate and rubber extruder |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR101301472B1 (en) * | 2012-03-21 | 2013-08-29 | 명일폼테크주식회사 | T die apparatus and fabricating method thereof |
-
1991
- 1991-02-25 JP JP1991015024U patent/JP2520238Y2/en not_active Expired - Lifetime
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2020055243A (en) * | 2018-10-03 | 2020-04-09 | 住友ゴム工業株式会社 | Die plate and rubber extruder |
| JP2020055242A (en) * | 2018-10-03 | 2020-04-09 | 住友ゴム工業株式会社 | Die plate and rubber extruder |
Also Published As
| Publication number | Publication date |
|---|---|
| JP2520238Y2 (en) | 1996-12-11 |
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| EXPY | Cancellation because of completion of term |