JPH0523181B2 - - Google Patents
Info
- Publication number
- JPH0523181B2 JPH0523181B2 JP61159823A JP15982386A JPH0523181B2 JP H0523181 B2 JPH0523181 B2 JP H0523181B2 JP 61159823 A JP61159823 A JP 61159823A JP 15982386 A JP15982386 A JP 15982386A JP H0523181 B2 JPH0523181 B2 JP H0523181B2
- Authority
- JP
- Japan
- Prior art keywords
- additive
- base polymer
- extruder
- stage extruder
- additives
- 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 - Lifetime
Links
- 239000000654 additive Substances 0.000 claims description 40
- 229920005601 base polymer Polymers 0.000 claims description 32
- 238000001125 extrusion Methods 0.000 claims description 32
- 229920000642 polymer Polymers 0.000 claims description 28
- 230000000996 additive effect Effects 0.000 claims description 22
- 238000002347 injection Methods 0.000 claims description 21
- 239000007924 injection Substances 0.000 claims description 21
- 239000004033 plastic Substances 0.000 claims description 3
- 229920003023 plastic Polymers 0.000 claims description 3
- 239000008188 pellet Substances 0.000 description 9
- 238000000034 method Methods 0.000 description 8
- 238000002156 mixing Methods 0.000 description 8
- 239000000047 product Substances 0.000 description 4
- 239000004596 additive masterbatch Substances 0.000 description 3
- 238000010586 diagram Methods 0.000 description 3
- 230000003068 static effect Effects 0.000 description 3
- 239000004594 Masterbatch (MB) Substances 0.000 description 2
- 238000013329 compounding Methods 0.000 description 2
- 239000002994 raw material Substances 0.000 description 2
- 238000011144 upstream manufacturing Methods 0.000 description 2
- 239000003086 colorant Substances 0.000 description 1
- 238000007796 conventional method Methods 0.000 description 1
- 230000003247 decreasing effect Effects 0.000 description 1
- 239000006185 dispersion Substances 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 239000012467 final product Substances 0.000 description 1
- 238000004898 kneading Methods 0.000 description 1
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C48/00—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor
- B29C48/25—Component parts, details or accessories; Auxiliary operations
- B29C48/36—Means for plasticising or homogenising the moulding material or forcing it through the nozzle or die
- B29C48/375—Plasticisers, homogenisers or feeders comprising two or more stages
- B29C48/39—Plasticisers, homogenisers or feeders comprising two or more stages a first extruder feeding the melt into an intermediate location of a second extruder
-
- 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
- B29C48/36—Means for plasticising or homogenising the moulding material or forcing it through the nozzle or die
- B29C48/375—Plasticisers, homogenisers or feeders comprising two or more stages
- B29C48/385—Plasticisers, homogenisers or feeders comprising two or more stages using two or more serially arranged screws in separate barrels
-
- 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
- B29C48/36—Means for plasticising or homogenising the moulding material or forcing it through the nozzle or die
- B29C48/365—Means for plasticising or homogenising the moulding material or forcing it through the nozzle or die using pumps, e.g. piston pumps
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Extrusion Moulding Of Plastics Or The Like (AREA)
Description
【発明の詳細な説明】
（産業上の利用分野）
本発明はプラスチツク押出成形装置に関するも
のである。DETAILED DESCRIPTION OF THE INVENTION (Field of Industrial Application) The present invention relates to a plastic extrusion molding apparatus.
（従来の技術）
プラスチツクの押出成形を行うに際して、種々
の添加剤、例えば着色剤を添加したポリマーを用
いる事は広く行われている。(Prior Art) When carrying out extrusion molding of plastics, it is widely practiced to use polymers to which various additives, such as colorants, are added.
かかる添加剤を含んだポリマーを得る方法とし
ては、添加剤をベースポリマー中に練込んで得た
添加剤入りのペレツトを用いるコンパウンド法、
又は添加剤を高濃度に含有したマスターバツチペ
レツトあるいは直接添加剤をベースポリマーペレ
ツトと調合して得られるチツプブレンド法等が知
られている。 Methods for obtaining polymers containing such additives include a compounding method using pellets containing the additives obtained by kneading the additives into a base polymer;
Alternatively, masterbatch pellets containing additives at a high concentration or a chip blending method in which additives are directly blended with base polymer pellets are known.
しかし前者のコンパウンド法によつた場合に
は、原料ペレツト代が高価なため、少量多品種の
成形品を生産するにはコスト高となる。また後の
チツプブレンド法によつた場合には、コストダウ
ンを狙つてはいるものの、更に一段とコストダウ
ンを図る目的で、マスターバツチの混入率を低下
させると斑が生じ易いという欠点を有している。 However, when the former compounding method is used, the raw material pellets are expensive, so the cost is high to produce a wide variety of molded products in small quantities. In addition, when using the later chip blending method, although the aim is to reduce costs, it has the disadvantage that spots tend to occur when the mixing rate of the masterbatch is lowered in order to further reduce costs. .
更に前記いずれの方法にあつても、品種切換時
に大量の原料ロスが出る事も免れず、しかも切換
に多大の労力と時間とを要するのが通常である。
また耐熱性の低い添加剤は使えないという共通の
欠点も有している。 Furthermore, in any of the above-mentioned methods, it is inevitable that a large amount of raw material will be lost when changing the product type, and moreover, switching usually requires a great deal of labor and time.
They also have a common drawback that additives with low heat resistance cannot be used.
従来これらとは別に第２図に示す様な添加剤の
注入方法も知られている。 Apart from these methods, a method of injecting additives as shown in FIG. 2 is also known.
即ち、ベースポリマーペレツトが投入、溶融、
押出しされる主押出機１１１は、ベースポリマー
押出流路１１２及び静止型混合器１１３を介して
ダイ１１４に接続されている。 That is, base polymer pellets are introduced, melted,
A main extruder 111 for extrusion is connected to a die 114 via a base polymer extrusion channel 112 and a static mixer 113.
一方ベースポリマー押出流路１１２には、複数
組（図示の場合は２組である）の添加剤注入路１
６１，１６２が連結されており、これらの添加剤
注入路１６１，１６２には夫々弁１７１，１７２
が設けられており、これらの弁を選択的に開く事
により、適宜なる組の注入路のみがベースポリマ
ー押出流路１１２に流体的に接続される。また添
加剤注入路１６１，１６２は、夫々定量ポンプ１
９１，１９２を介して上流端において添加剤マス
ターバツチペレツトが投入、溶融、押出しされる
副押出機１８１，１８２に接続されている。 On the other hand, the base polymer extrusion channel 112 includes a plurality of sets (two sets in the illustrated case) of additive injection channels 1.
61 and 162 are connected to each other, and valves 171 and 172 are connected to these additive injection paths 161 and 162, respectively.
are provided, and by selectively opening these valves, only the appropriate set of injection channels are fluidly connected to the base polymer extrusion channel 112. Further, the additive injection paths 161 and 162 are connected to the metering pump 1, respectively.
At the upstream end, the additive master batch pellets are connected via pipes 91, 192 to sub-extruders 181, 182 into which the additive master batch pellets are fed, melted and extruded.
（発明が解決しようとする問題点）
前記第２図の従来の方法の場合には、添加剤の
混合状態の均一度は静止型混合器１１３の混合作
用のみに依存し、その精度を向上する時は、静止
した螺旋状ブレードの数を増加させる必要があ
る。その結果ベースポリマー押出流路の圧力上昇
による押出量の低下から、スクリユ回転数の増加
に伴つてポリマー温度が上昇し、耐熱性の低い添
加剤の使用は困難であつた。(Problems to be Solved by the Invention) In the case of the conventional method shown in FIG. 2, the uniformity of the additive mixing state depends only on the mixing action of the static mixer 113, and the accuracy is improved. Sometimes it is necessary to increase the number of stationary helical blades. As a result, the extrusion rate decreased due to the increase in pressure in the base polymer extrusion channel, and as the screw rotation speed increased, the polymer temperature increased, making it difficult to use additives with low heat resistance.
また局所滞留部が増加して劣化ポリマーが発生
し、品種切換時間が長くなつてロスとして廃業す
るポリマーも増える。更に静止型混合器特有の混
合作用による各ポリマー分割層間の混合割合の差
も解決され得なかつた。その上ベースポリマー押
出流路に定量ポンプを欠いているため、最終製品
における添加剤濃度のバラツキを低くおさえるこ
とがむつかしかつた。 In addition, the number of local stagnation areas increases, resulting in degraded polymers, which lengthens the time required to change product types, and increases the number of polymers that go out of business as losses. Furthermore, the difference in mixing ratio between the polymer divided layers due to the mixing action peculiar to the static mixer could not be solved. Moreover, the lack of a metering pump in the base polymer extrusion channel made it difficult to keep the variation in additive concentration low in the final product.
本発明は前記従来の問題点を解決するために提
案されたものである。 The present invention has been proposed to solve the above-mentioned conventional problems.
（問題点を解決するための手段）
このため本発明は、一段目押出機の吐出口と、
二段目押出機の供給口とを連結管により連結した
二段型押出機において、前記連結管はベースポリ
マー押出流路と、１組以上の添加剤入ポリマー注
入路を連結したベースポリマー押出流路との２流
路で構成され、前記添加剤入ポリマー注入路は添
加剤入ポリマー注入用押出機に連結されると共
に、前記二段目押出機の吐出側に定量ポンプを設
けてなるもので、これを問題点解決のための手段
とするものである。(Means for solving the problem) Therefore, the present invention provides a discharge port of a first stage extruder,
In a two-stage extruder in which the supply port of the second-stage extruder is connected by a connecting pipe, the connecting pipe is a base polymer extrusion flow path that connects a base polymer extrusion flow path and one or more sets of additive-containing polymer injection paths. The additive-containing polymer injection channel is connected to an extruder for injection of additive-containing polymer, and a metering pump is provided on the discharge side of the second-stage extruder. , this is a means to solve problems.
（作 用）
二段型押出機の連結管、即ちベースポリマー押
出流路に対し、１個以上の添加剤入ポリマー注入
路を夫々定量ポンプを介して接続可能に用意し、
この内１組以上の添加剤入ポリマー注入路を選択
し、ベースポリマー押出流路に接続して所望の１
種以上の添加剤をベースポリマー中に注入し、次
いでこれを二段目押出機を経て定量ポンプを介し
て押出成形する。(Function) One or more additive-containing polymer injection channels are prepared so as to be connectable to the connecting pipe of the two-stage extruder, that is, the base polymer extrusion flow channel via a metering pump, respectively.
Select one or more of these additive-containing polymer injection channels and connect them to the base polymer extrusion channel to form the desired one.
One or more additives are injected into the base polymer, which is then extruded through a second stage extruder via a metering pump.
（実施例）
以下本発明を図面の実施例について説明する
と、第１図は本発明の押出成形装置の１実施例を
示すものである。図においてベースポリマーペレ
ツトが投入、溶融、押出される第一段目押出機１
と第二段目押出機５からなる二段型押出機は、ベ
ースポリマー押出流路３，３ａ，６、切換バルブ
２，４を介して接続されると共に、二段目押出機
５の吐出側には、ベースポリマー押出流路６、定
量ポンプ７、フイルタ８を介してダイ９が接続さ
れている。(Example) The present invention will be described below with reference to the drawings. FIG. 1 shows one example of the extrusion molding apparatus of the present invention. In the figure, the first stage extruder 1 is where base polymer pellets are charged, melted, and extruded.
A two-stage extruder consisting of a second-stage extruder 5 and a second-stage extruder 5 is connected via base polymer extrusion channels 3, 3a, and 6, and switching valves 2 and 4, and is connected to the discharge side of the second-stage extruder 5. A die 9 is connected to the base polymer extrusion channel 6, a metering pump 7, and a filter 8.
一方ベースポリマー押出流路３には、１組以上
（図示は２組）の添加剤入ポリマー注入路１０，
１１が連結されており、これらの添加剤入ポリマ
ー注入路１０，１１には各々別１２，１３が設け
られており、これらの弁を選択的に開くことによ
り、適宜な１組以上の注入路のみがベースポリマ
ー押出流路３に流体的に接続される。また添加剤
入ポリマー注入路１０，１１は夫々定量ポンプ１
６，１７を介して、上流端において添加剤マスタ
ーバツチペレツト等が投入、溶融押出される副押
出機１４，１５に接続されている。 On the other hand, the base polymer extrusion channel 3 includes one or more sets (two sets shown) of additive-containing polymer injection channels 10,
These additive-containing polymer injection channels 10 and 11 are provided with separate injection channels 12 and 13, respectively, and by selectively opening these valves, one or more appropriate sets of injection channels can be opened. only is fluidly connected to the base polymer extrusion channel 3. Further, the additive-containing polymer injection channels 10 and 11 are each connected to a metering pump 1.
At the upstream end, the extruders 6 and 17 are connected to sub-extruders 14 and 15 into which additive master batch pellets and the like are fed and melted and extruded.
次に作用を説明すると、前記構造を有する装置
において、ベースポリマーは第一段目押出機１に
て溶融され、切換バルブ２を介してベースポリマ
ー押出流路３へ送られて来る。一方添加剤入ポリ
マーは副押出機１４にて溶融され、定量ポンプ１
６、添加剤注入路１０、弁１２を介してベースポ
リマー流路３へ送られ、前記ベースポリマーと合
流して切換バルブ４を通り、第二段目押出機５へ
送られる。 Next, the operation will be explained. In the apparatus having the above structure, the base polymer is melted in the first stage extruder 1 and sent to the base polymer extrusion channel 3 via the switching valve 2. On the other hand, the additive-containing polymer is melted in the sub-extruder 14, and the metering pump 1
6. It is sent to the base polymer flow path 3 via the additive injection path 10 and the valve 12, merges with the base polymer, passes through the switching valve 4, and is sent to the second stage extruder 5.
第二段目押出機５内にて、ベースポリマーと添
加剤入ポリマーは、スクリユの回転により混合あ
るいは混練され、均質なポリマーとなつてベース
ポリマー押出流路６、定量ポンプ７、フイルタ８
を介してダイ９より押出成形される。副押出機１
５、定量ポンプ１７、添加剤入ポリマー注入路１
１、弁１３は、更に異種の添加剤を注入する場合
に使用される。またベースポリマー押出流路３ａ
は、ベースポリマーの押出成形時に使用される。 In the second stage extruder 5, the base polymer and the additive-containing polymer are mixed or kneaded by the rotation of the screw to become a homogeneous polymer, which is passed through the base polymer extrusion channel 6, the metering pump 7, and the filter 8.
It is extruded from a die 9 through a die 9. Sub-extruder 1
5, metering pump 17, additive-containing polymer injection path 1
1. Valve 13 is used to further inject different types of additives. Also, the base polymer extrusion channel 3a
is used during extrusion molding of the base polymer.
（発明の効果）
以上詳細に説明した如く本発明は構成されてい
るので、添加剤の混合を第二段目押出機内で行な
うことができ、混合分散精度の良い、均質な押出
成形が可能となり、また二段型押出機は低温押出
しが可能である。従つて耐熱性の低い添加剤の使
用が出来る。更に本発明によると、局所滞留部が
ないので、劣化ポリマーの発生がなくなり、かつ
品種切換時間が減少する。また本発明は、一段
目、二段目押出機間を、ベースポリマー押出流路
と、添加剤入ポリマー注入路を連結したベースポ
リマー押出流路との２流路で連結しているので、
ベースポリマーの押出成形と、添加剤入ポリマー
の押出成形の兼用が可能であり、また添加剤入ポ
リマーは添加剤入ポリマー注入用押出機と定量ポ
ンプにより、添加剤とポリマーの量を正確にコン
トロールできる。(Effects of the Invention) Since the present invention is configured as explained in detail above, additives can be mixed in the second stage extruder, and homogeneous extrusion molding with good mixing and dispersion accuracy is possible. Also, the two-stage extruder is capable of low-temperature extrusion. Therefore, additives with low heat resistance can be used. Further, according to the present invention, since there is no local stagnation part, generation of degraded polymer is eliminated, and time required for product changeover is reduced. Furthermore, in the present invention, the first and second stage extruders are connected by two channels: a base polymer extrusion channel and a base polymer extrusion channel connected to an additive-containing polymer injection channel.
It is possible to extrude base polymers and extrude polymers with additives, and for polymers with additives, the amounts of additives and polymers can be precisely controlled using an extruder for injecting polymers with additives and a metering pump. can.
第１図は本発明の実施例を示す押出成形装置の
系統図、第２図は従来の押出成形装置の系統図で
ある。
図の主要部分の説明 １…第一段目押出機、
２，４…切換バルブ、３，３ａ，６…ベースポリ
マー押出流路、５…第二段目押出機、７，１６，
１７…定量ポンプ、１０，１１…添加剤入ポリマ
ー注入路、１４，１５…副押出機（添加剤用）。
FIG. 1 is a system diagram of an extrusion molding apparatus showing an embodiment of the present invention, and FIG. 2 is a system diagram of a conventional extrusion molding apparatus. Explanation of main parts of the diagram 1...First stage extruder,
2, 4... Switching valve, 3, 3a, 6... Base polymer extrusion channel, 5... Second stage extruder, 7, 16,
17... Metering pump, 10, 11... Additive-containing polymer injection path, 14, 15... Sub-extruder (for additives).
Claims (1)
給口とを連結管により連結した二段型押出機にお
いて、前記連結管はベースポリマー押出流路と、
１組以上の添加剤入ポリマー注入路を連結したベ
ースポリマー押出流路との２流路で構成され、前
記添加剤入ポリマー注入路は添加剤入ポリマー注
入用押出機に連結されると共に、前記二段目押出
機の吐出側に定量ポンプを設けたことを特徴とす
るプラスチツク押出成形装置。1. In a two-stage extruder in which the discharge port of the first-stage extruder and the supply port of the second-stage extruder are connected by a connecting pipe, the connecting pipe is connected to a base polymer extrusion flow path,
It is composed of two channels, a base polymer extrusion channel connected to one or more sets of additive-containing polymer injection channels, and the additive-containing polymer injection channel is connected to an extruder for injection of additive-containing polymer, and A plastic extrusion molding apparatus characterized in that a metering pump is provided on the discharge side of a second stage extruder.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP61159823A JPS6317025A (en) | 1986-07-09 | 1986-07-09 | Plastic extrusion molding equipment |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP61159823A JPS6317025A (en) | 1986-07-09 | 1986-07-09 | Plastic extrusion molding equipment |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS6317025A JPS6317025A (en) | 1988-01-25 |
| JPH0523181B2 true JPH0523181B2 (en) | 1993-03-31 |
Family
ID=15702029
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP61159823A Granted JPS6317025A (en) | 1986-07-09 | 1986-07-09 | Plastic extrusion molding equipment |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS6317025A (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5725814A (en) * | 1995-06-07 | 1998-03-10 | Harrel, Inc. | Extrusion of an article of varying content |
| US5695789A (en) * | 1995-06-07 | 1997-12-09 | Harrel, Inc. | Apparatus for extrusion of an article of varying content |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS4825059A (en) * | 1971-08-02 | 1973-04-02 |
-
1986
- 1986-07-09 JP JP61159823A patent/JPS6317025A/en active Granted
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS4825059A (en) * | 1971-08-02 | 1973-04-02 |
Also Published As
| Publication number | Publication date |
|---|---|
| JPS6317025A (en) | 1988-01-25 |
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