JPS6155448B2 - - Google Patents
Info
- Publication number
- JPS6155448B2 JPS6155448B2 JP522180A JP522180A JPS6155448B2 JP S6155448 B2 JPS6155448 B2 JP S6155448B2 JP 522180 A JP522180 A JP 522180A JP 522180 A JP522180 A JP 522180A JP S6155448 B2 JPS6155448 B2 JP S6155448B2
- Authority
- JP
- Japan
- Prior art keywords
- synthetic resin
- chips
- trough
- screw feeder
- vacuum container
- 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
- 229920003002 synthetic resin Polymers 0.000 claims description 15
- 239000000057 synthetic resin Substances 0.000 claims description 15
- 238000010438 heat treatment Methods 0.000 claims description 7
- 238000000034 method Methods 0.000 claims description 7
- 238000003672 processing method Methods 0.000 claims description 4
- 239000007790 solid phase Substances 0.000 description 6
- 238000006116 polymerization reaction Methods 0.000 description 4
- 238000010586 diagram Methods 0.000 description 2
- 239000004952 Polyamide Substances 0.000 description 1
- 238000003889 chemical engineering Methods 0.000 description 1
- 230000000593 degrading effect Effects 0.000 description 1
- 238000001035 drying Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 229920002647 polyamide Polymers 0.000 description 1
- 229920006149 polyester-amide block copolymer Polymers 0.000 description 1
- 230000002123 temporal effect Effects 0.000 description 1
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29B—PREPARATION OR PRETREATMENT OF THE MATERIAL TO BE SHAPED; MAKING GRANULES OR PREFORMS; RECOVERY OF PLASTICS OR OTHER CONSTITUENTS OF WASTE MATERIAL CONTAINING PLASTICS
- B29B13/00—Conditioning or physical treatment of the material to be shaped
- B29B13/02—Conditioning or physical treatment of the material to be shaped by heating
- B29B13/021—Heat treatment of powders
Landscapes
- Physics & Mathematics (AREA)
- Thermal Sciences (AREA)
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Processing And Handling Of Plastics And Other Materials For Molding In General (AREA)
- Polyesters Or Polycarbonates (AREA)
- Other Resins Obtained By Reactions Not Involving Carbon-To-Carbon Unsaturated Bonds (AREA)
Description
【発明の詳細な説明】
本発明は合成樹脂チツプを真空下において連続
的に乾燥又は固相重合する場合において、合成樹
脂チツプを連続的に加熱しながら定量供給する処
理方法を提供するものである。DETAILED DESCRIPTION OF THE INVENTION The present invention provides a processing method for continuously heating synthetic resin chips and supplying the same in a fixed amount when the synthetic resin chips are continuously dried or solid-phase polymerized under vacuum. .
合成樹脂チツプを真空下において連続的に乾燥
又は固相重合する場合、精度よく定量供給する処
理方法が必要である。常圧下であればロータリー
バルブやテーブルフイーダの如き供給装置が適用
可能であるが、品質ムラを極力おさえなければな
らない製品プロセスにあつては供給方法に極めて
高い精度が要求される。 When synthetic resin chips are continuously dried under vacuum or subjected to solid phase polymerization, a treatment method is required that allows precise quantitative feeding. Feeding devices such as rotary valves and table feeders can be used under normal pressure, but extremely high precision is required in the feeding method in product processes where quality unevenness must be suppressed as much as possible.
上記事情より、より高い精度を必要とする場合
はスクリユーフイーダが使用されるが、真空下特
に1トール前後の高真空下ではスクリユーフイー
ダの供給と吐出側の真空度差が存在すると、精度
よく定量供給することが困難である。 Due to the above circumstances, a screw feeder is used when higher precision is required, but under vacuum, especially under a high vacuum of around 1 Torr, there is a difference in the degree of vacuum between the supply and discharge sides of the screw feeder. , it is difficult to supply accurately and quantitatively.
即ち、吐出側の真空度が供給側よりも低いと
き、設定吐出量より多く吐出され、吐出側の系例
えば乾燥機或は固相重合機とのバランスがくず
れ、吐出側の系が安定せず満足すべき製品を得る
ことが不能となつたり、閉塞等のトラブルを起す
結果となる。又閉塞を生じると設備損傷の原因と
なり工程ロス、修理費等の面で無駄な出費を必要
とする。 In other words, when the degree of vacuum on the discharge side is lower than that on the supply side, more than the set discharge amount is discharged, and the balance with the discharge side system, such as a dryer or solid phase polymerization machine, is lost, and the discharge side system becomes unstable. As a result, it becomes impossible to obtain a satisfactory product or troubles such as blockage occur. In addition, if blockage occurs, it causes damage to the equipment, resulting in unnecessary expense in terms of process loss and repair costs.
更には乾燥機等の如く加熱の必要な系に供給す
る場合、スクリユーフイーダに電熱又は熱媒ジヤ
ケツトを設けて予熱するのが好ましいが、このよ
うに加熱しながら供給する際、従来の装置ではバ
レルとスクリユー羽根(フライト部)の間隙にチ
ツプを噛み込易すく、このためチツプが融着して
変形したり、又噛み込が激しくモータがオーバロ
ードし運転不能となる欠点があつた。特にバレル
が円形のときはバレル内壁全周にわたつてフライ
ト部との間にチツプを噛み込むため上記傾向が強
く安定した運転が行なえない問題があつた。 Furthermore, when feeding to a system that requires heating, such as a dryer, it is preferable to preheat the screw feeder by installing an electric heat or heating medium jacket. In this case, the chips tend to get caught in the gap between the barrel and the screw blade (flight part), which causes the chips to fuse and become deformed, and the chips get so caught that the motor overloads and becomes inoperable. In particular, when the barrel is circular, the above-mentioned tendency is strong and there is a problem in that stable operation cannot be performed because the chips are caught between the barrel and the flight part over the entire circumference of the inner wall of the barrel.
本発明者はかかる状況に鑑み、合成樹脂チツプ
を真空かつ加熱下で連続的に乾燥又は固相重合す
る際、その供給手段として合成樹脂チツプを連続
的に加熱しながら定量性よく移送しかつ融着チツ
プの発生しない定量供給する処理方法を完成し
た。 In view of this situation, the inventors of the present invention have determined that when synthetic resin chips are continuously dried or solid-phase polymerized under vacuum and heat, the synthetic resin chips are continuously heated, transferred with good quantity, and melted as a supply means. We have completed a processing method that can supply a fixed amount of chips without causing any stuck chips.
すなわち、本発明は合成樹脂チツプを横型の一
軸式スクリユーフイーダを介してホツパーから真
空容器に連続的に加熱しながら定量供給する処理
方法において、ホツパーと真空容器間を導通管で
連結して両者の内圧を均一に保持するとともに、
上記スクリユーフイーダのバレルをU字型のとい
状体とし、該とい状体の下部半円状内壁とスクリ
ユー羽根との隙間を合成樹脂チツプの厚さ以下に
して前記とい状体の外側に形成した加熱用のジヤ
ケツトにより合成樹脂チツプを加熱しながら真空
容器に供給することを特徴とする合成樹脂チツプ
の処理方法である。 That is, the present invention provides a processing method for continuously heating and quantitatively feeding synthetic resin chips from a hopper to a vacuum container via a horizontal uniaxial screw feeder, in which the hopper and the vacuum container are connected by a conduit tube. In addition to maintaining the internal pressure of both,
The barrel of the screw feeder is a U-shaped trough body, and the gap between the lower semicircular inner wall of the trough body and the screw blade is set to be less than the thickness of the synthetic resin chip, and the outer side of the trough body is This method of processing synthetic resin chips is characterized in that the synthetic resin chips are supplied to a vacuum container while being heated by a formed heating jacket.
以下、本発明を図面に基づいて説明する。第1
図は本発明の実施例を示す配置図、第2図は第1
図のスクリユーフイーダの概略断面図、第3図は
第2図のA―A断面矢視図である。図において、
1はポリエステル、ポリアミドの如き合成樹脂チ
ツプのホツパーで、その下方位置に乾燥又は固相
重合するための加熱された真空容器2が配設され
ている。3はホツパー1と真空容器2の間に設け
られたスクリユーフイーダで、その供給口3aと
ホツパー1の排出口1aおよび排出口3bと真空
容器2の供給口2aとが相互に連結され、ホツパ
ー1のチツプはこのスクリユーフイーダ3を介し
て真空容器2に連続的に供給される。スクリユー
フイーダ3は下半部が円形のU字状断面のとい状
体(以下トラフ4と称する。トラフについては昭
和43年5月10日発行、丸善株式会社発行、化学工
学便覧改訂三版第844頁参照)とこのトラフ4内
に挿入されたスクリユー羽根5を有する回転軸6
を含んで構成され、更にトラフ4の外面にはスチ
ーム等によつて加熱を行うジヤケツト7が設けら
れている。又トラフ4の下半部半円状内壁と羽根
5の先(外)端面との間隙Bは使用するチツプの
厚さ以下、例えば長さ4×幅2×厚さ2m/mの
板状、長径4×短径3×厚さ2m/mの楕円状等
では2m/m以下、径3m/mの球状のものでは3
m/m以下にされるが、この隙間は出来るだけ小
さくするのが定量性から好ましく、使用するチツ
プの厚さより大きくなると定量性が悪化すると同
時に、チツプの噛み込が生じ易すく種々のトラブ
ルを誘発することになる。8は駆動用のモータで
ある。9はホツパー1と真空容器2とを結ぶ導通
管で、該導通管9によりホツパー1と真空容器2
はほぼ真空度が等しくなりスクリユーフイーダ3
の供給側と排出側の真空度の差がなくなる。10
はチツプの供給管、11はスチームエゼクタ等の
真空発生装置12に連なる吸引管である。尚、2
bは真空容器2で処理されたチツプの排出口であ
る。しかして、ホツパー1には2つの弁或は容器
等によつて真空置換された状態でチツプが間欠的
に供給され所定のレベル間にある如くされている
が、ホツパー1から真空容器2への供給はスクリ
ユーフイーダ3によつて連続的に加熱されながら
行なわれる。すなわち、供給口3aからトラフ4
に入つたチツプは回転するスクリユー羽根5によ
り排出口3bに送られ真空容器2に供給される。
この場合、導通管9によつてスクリユーフイーダ
3の供給および排出側の真空度がほぼ同じに保持
されているから、真空吸引力によりずるずると能
力以上に排出されることがなく、従つて時間的な
変動は殆ど生じなくなる。又トラフ4の下半部内
壁とスクリユー羽根5の外径端との間隙Bはチツ
プの厚さ以下にされているため、この隙間にチツ
プの噛込むことがなく、従つて送り量が一定とな
り定量性が非常によくなると共に(通常±1%の
精度)融着した変形チツプの発生もなく品質の劣
つたチツプを送出してトラブルを起すこともなく
なる。 Hereinafter, the present invention will be explained based on the drawings. 1st
The figure is a layout diagram showing an embodiment of the present invention, and FIG.
FIG. 3 is a schematic cross-sectional view of the screw feeder shown in the figure, and FIG. 3 is a cross-sectional view taken along line AA in FIG. In the figure,
Reference numeral 1 denotes a hopper for synthetic resin chips such as polyester or polyamide, and a heated vacuum container 2 for drying or solid phase polymerization is disposed below the hopper. 3 is a screw feeder provided between the hopper 1 and the vacuum container 2, the supply port 3a and the discharge port 1a of the hopper 1 and the discharge port 3b and the supply port 2a of the vacuum container 2 are interconnected, Chips in the hopper 1 are continuously supplied to the vacuum container 2 via the screw feeder 3. Screw feeder 3 is a trough-shaped body (hereinafter referred to as trough 4) with a U-shaped cross section and a circular lower half (hereinafter referred to as trough 4).The trough is published on May 10, 1960, published by Maruzen Co., Ltd., Chemical Engineering Handbook Revised Third Edition (see page 844) and a rotating shaft 6 having a screw blade 5 inserted into this trough 4.
Further, the outer surface of the trough 4 is provided with a jacket 7 for heating with steam or the like. Also, the gap B between the semicircular inner wall of the lower half of the trough 4 and the tip (outer) end surface of the blade 5 is equal to or less than the thickness of the chip used, for example, a plate-shaped chip with a length of 4 x width of 2 x thickness of 2 m/m, 2m/m or less for an elliptical shape with 4 major axis x 3 minor axis x 2 m/m thickness, and 3 m/m for a spherical shape with a diameter of 3 m/m.
m/m or less, but it is preferable to make this gap as small as possible from the viewpoint of quantitative performance.If it becomes larger than the thickness of the chip used, quantitative performance will deteriorate, and at the same time, the chip is likely to get caught, which can cause various problems. It will provoke. 8 is a driving motor. Reference numeral 9 denotes a conduction pipe that connects the hopper 1 and the vacuum vessel 2;
The degree of vacuum is almost equal, and the screw feeder 3
The difference in the degree of vacuum between the supply side and the discharge side disappears. 10
11 is a chip supply pipe, and 11 is a suction pipe connected to a vacuum generator 12 such as a steam ejector. In addition, 2
b is a discharge port for chips processed in the vacuum container 2; Chips are intermittently supplied to the hopper 1 in a vacuum-displaced state using two valves or containers, etc., so that the chips are between predetermined levels. The feed is carried out while being continuously heated by the screw feeder 3. That is, from the supply port 3a to the trough 4
The chips that have entered are sent to the discharge port 3b by the rotating screw blade 5 and supplied to the vacuum container 2.
In this case, since the degree of vacuum on the supply and discharge sides of the screw feeder 3 is kept almost the same by the conduit 9, the vacuum suction force will not cause the discharge to exceed its capacity. Almost no temporal variation occurs. Also, since the gap B between the inner wall of the lower half of the trough 4 and the outer diameter end of the screw blade 5 is set to be less than the thickness of the chip, the chip will not get caught in this gap, and therefore the feed rate will be constant. Quantitative performance becomes very good (accuracy usually ±1%), and there is no occurrence of fused and deformed chips, and there is no longer any trouble caused by sending out chips of inferior quality.
このようにして真空容器2にチツプは予熱され
かつ品質を損うことなく極めて定量性よく供給さ
れるから真空容器2における処理が安定し均一か
つ優れた品質の製品を得ることが可能となる。 In this way, the chips are preheated and supplied to the vacuum container 2 with extremely high quantitative accuracy without degrading the quality, so that the processing in the vacuum container 2 is stable and it is possible to obtain a uniform and excellent quality product.
以上に説明の如く、本発明によれば真空容器へ
の合成樹脂チツプの連続的加熱供給が極めて精度
よくしかも品質を損なつたり運転不能と言つたト
ラブルを生じることなく安定して行え、乾燥或は
固相重合工程における工程安定化と共に製品の品
質斑をなくすることが可能となりその効果は非常
に大である。 As explained above, according to the present invention, it is possible to continuously heat and supply synthetic resin chips to a vacuum container with extremely high accuracy and stably without causing problems such as loss of quality or inability to operate. It is possible to stabilize the process in the solid phase polymerization process and eliminate unevenness in the quality of the product, and its effects are very large.
第1図は本発明の実施例を示す配置図、第2図
は第1図のスクリユーフイーダの概略断面図、第
3図は第2図のA―A断面矢視図である。
1…ホツパー、2…真空容器、3…スクリユー
フイーダ、4…トラフ、5…スクリユー羽根、7
…ジヤケツト、9…導通管。
1 is a layout diagram showing an embodiment of the present invention, FIG. 2 is a schematic sectional view of the screw feeder in FIG. 1, and FIG. 3 is a sectional view taken along the line AA in FIG. 2. 1...Hopper, 2...Vacuum container, 3...Screw feeder, 4...Trough, 5...Screw blade, 7
...jacket, 9...conducting pipe.
Claims (1)
イーダを介してホツパーから真空容器に連続的に
加熱しながら定量供給する処理方法において、ホ
ツパーと真空容器間を導通管で連結して両者の内
圧を均一に保持するとともに、上記スクリユーフ
イーダのバレルをU字型のとい状体とし、該とい
状体の下部半円状内壁とスクリユー羽根との隙間
を合成樹脂チツプの厚さ以下にして前記とい状体
の外側に形成した加熱用のジヤケツトにより合成
樹脂チツプを加熱しながら真空容器に供給するこ
とを特徴とする合成樹脂チツプの処理方法。1 In a processing method in which synthetic resin chips are continuously heated and quantitatively fed from a hopper to a vacuum container via a horizontal uniaxial screw feeder, the hopper and the vacuum container are connected with a conductive tube to reduce the internal pressure between the two. In addition to holding the screw feeder uniformly, the barrel of the screw feeder is made into a U-shaped trough-like body, and the gap between the lower semicircular inner wall of the trough-like body and the screw blade is set to be less than the thickness of the synthetic resin chip. A method for processing synthetic resin chips, characterized in that the synthetic resin chips are heated by a heating jacket formed on the outside of a trough-shaped body and fed into a vacuum container.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP522180A JPS56104013A (en) | 1980-01-22 | 1980-01-22 | Supplying device for proportioned quantity of synthetic resin chip |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP522180A JPS56104013A (en) | 1980-01-22 | 1980-01-22 | Supplying device for proportioned quantity of synthetic resin chip |
Publications (2)
Publication Number | Publication Date |
---|---|
JPS56104013A JPS56104013A (en) | 1981-08-19 |
JPS6155448B2 true JPS6155448B2 (en) | 1986-11-27 |
Family
ID=11605134
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP522180A Granted JPS56104013A (en) | 1980-01-22 | 1980-01-22 | Supplying device for proportioned quantity of synthetic resin chip |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS56104013A (en) |
Families Citing this family (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2006056188A (en) * | 2004-08-23 | 2006-03-02 | Star Seiki Co Ltd | Device and method for drying resin pellet |
JP4996556B2 (en) * | 2008-07-09 | 2012-08-08 | 株式会社日本製鋼所 | Vacuum extrusion equipment |
JP5273006B2 (en) * | 2009-10-06 | 2013-08-28 | 三菱化学株式会社 | Method for producing polycarbonate resin |
AT516968B1 (en) * | 2015-03-23 | 2018-01-15 | Next Generation Recyclingmaschinen Gmbh | Plant and method for treating a plastic melt |
-
1980
- 1980-01-22 JP JP522180A patent/JPS56104013A/en active Granted
Also Published As
Publication number | Publication date |
---|---|
JPS56104013A (en) | 1981-08-19 |
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