JPH0576886B2 - - Google Patents
Info
- Publication number
- JPH0576886B2 JPH0576886B2 JP61285955A JP28595586A JPH0576886B2 JP H0576886 B2 JPH0576886 B2 JP H0576886B2 JP 61285955 A JP61285955 A JP 61285955A JP 28595586 A JP28595586 A JP 28595586A JP H0576886 B2 JPH0576886 B2 JP H0576886B2
- Authority
- JP
- Japan
- Prior art keywords
- raw material
- material supply
- resin
- plasticizing
- rotary sealing
- 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
- 239000002994 raw material Substances 0.000 claims description 55
- 239000011347 resin Substances 0.000 claims description 28
- 229920005989 resin Polymers 0.000 claims description 28
- 238000010438 heat treatment Methods 0.000 claims description 27
- 238000007789 sealing Methods 0.000 claims description 17
- 239000007790 solid phase Substances 0.000 claims description 5
- 238000011144 upstream manufacturing Methods 0.000 claims description 2
- 239000002245 particle Substances 0.000 description 7
- 238000000034 method Methods 0.000 description 5
- 239000007791 liquid phase Substances 0.000 description 3
- 239000007787 solid Substances 0.000 description 3
- 230000007547 defect Effects 0.000 description 2
- 238000007872 degassing Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 238000001125 extrusion Methods 0.000 description 2
- 238000001746 injection moulding Methods 0.000 description 2
- 239000007788 liquid Substances 0.000 description 2
- 238000003860 storage Methods 0.000 description 2
- 230000000903 blocking effect Effects 0.000 description 1
- 238000004140 cleaning Methods 0.000 description 1
- 238000007796 conventional method Methods 0.000 description 1
- 239000002826 coolant Substances 0.000 description 1
- 230000002950 deficient Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000005484 gravity Effects 0.000 description 1
- 238000002347 injection Methods 0.000 description 1
- 239000007924 injection Substances 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 239000012071 phase Substances 0.000 description 1
- 238000009987 spinning Methods 0.000 description 1
- 238000009423 ventilation 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
- B29C48/285—Feeding the extrusion material to the extruder
- B29C48/29—Feeding the extrusion material to the extruder in liquid form
-
- 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
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29K—INDEXING SCHEME ASSOCIATED WITH SUBCLASSES B29B, B29C OR B29D, RELATING TO MOULDING MATERIALS OR TO MATERIALS FOR MOULDS, REINFORCEMENTS, FILLERS OR PREFORMED PARTS, e.g. INSERTS
- B29K2105/00—Condition, form or state of moulded material or of the material to be shaped
- B29K2105/0005—Condition, form or state of moulded material or of the material to be shaped containing compounding ingredients
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Processing And Handling Of Plastics And Other Materials For Molding In General (AREA)
- Injection Moulding Of Plastics Or The Like (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、プラスチツク用射出成形機や押出機
の樹脂可塑化装置に関し、特に同装置における原
料供給部での脱気に特徴を有する可塑化装置に関
するものである。Detailed Description of the Invention (Industrial Field of Application) The present invention relates to a resin plasticizing device for a plastic injection molding machine or an extruder, and particularly to a plasticizing device having a degassing feature in the raw material supply section of the device. It is related to the device.
（従来の技術）
一般に、射出成形機や押出機の樹脂可塑化装置
では、原料供給ホツパから供給される原料粒子間
にある気体は、可塑化装置内で樹脂を溶融・加圧
するとき、原料供給ホツパ側へ十分に抜け切れな
いままに溶融樹脂中に含まれた状態で可塑化装置
から吐出されることが多く、そのため例えば紡糸
用押出機では糸切れの原因となつたり、シート又
はフイルム用押出機ではそれ自体が気泡として残
るという欠陥を生じ、また射出機ではフラツシユ
となつて外観不良を生じるという各製品に不良現
象を誘起する。(Prior art) Generally, in a resin plasticizing device for an injection molding machine or an extrusion machine, the gas between the raw material particles supplied from the raw material supply hopper is released when the resin is melted and pressurized in the plasticizing device. In many cases, the molten resin is discharged from the plasticizing device without being fully removed to the hopper side, which may cause yarn breakage in extruders for spinning, or in extrusion for sheets or films. In the machine, it causes a defect in that it remains as bubbles, and in the injection machine, it flashes, causing a defective appearance, which causes defects in each product.
そこで、従来はこれに解決するために次の様な
各種方式が採用されていた。 Therefore, in order to solve this problem, the following various methods have been adopted in the past.
(1) 原料供給部ホツパを第５図に示す様に原料貯
蔵タンク４と真空ホツパ２１を直列につない
で、真空バルブ２２の操作により前記真空ホツ
パ２１内を真空として原料中の気体を脱気する
真空ホツパ方式。(1) Connect the raw material supply hopper in series with the raw material storage tank 4 and the vacuum hopper 21 as shown in FIG. Vacuum hopper method.
(2) 可塑化装置（通常はスクリユ式がほとんどで
ある。）自体の加圧、加熱効果により、原料粒
子間の空隙をスクリユ先端に行くにつれて減少
させるという方式。このとき原料粒子間の気体
は、スクリユ内を原料供給部へと逃げることと
なる。(2) A method in which the voids between raw material particles are reduced toward the tip of the screw using the pressure and heating effects of the plasticizing device (usually a screw type) itself. At this time, the gas between the raw material particles escapes through the screw to the raw material supply section.
(3) 樹脂のほとんどが溶融した状態にある可塑化
装置の中間部にスクリユ内に樹脂が充満されな
い区間を設け、この部分を真空引する、いわゆ
るベント形可塑化方式。(3) A so-called vent-type plasticizing method in which a section where the screw is not filled with resin is provided in the middle of the plasticizing device where most of the resin is in a molten state, and this section is evacuated.
（発明が解決しようとする問題点）
しかしながら、これらの従来方式には、以下の
様な欠点がある。(Problems to be Solved by the Invention) However, these conventional methods have the following drawbacks.
(1) まず、真空ホツパ方式は、装置自体が大がか
りなものとなり、製作コストが高く、広い設置
空間を必要とし、バルブの保守（バルブの損傷
により、大形の原料貯蔵タンク４までもが負圧
となつて破損したり、真空ホツパの真空度が保
たれないほどの問題が生じる。）あるいは原料
切換時の清掃などその保守・管理上等の問題点
がある。(1) First, the vacuum hopper method requires a large-scale device, high manufacturing costs, and a large installation space. There are problems with maintenance and management, such as cleaning when changing raw materials.
(2) 次の可塑化装置自体による脱気方式では、可
塑化能力を増大させようとする場合には例えば
スクリユ内での樹脂の滞留時間が短くなつて原
料粒子の温度が十分にスクリユ内で上昇されな
くなり、そのため原料粒子間の空隙が減少しに
くくなつて、脱気が不十分となる。(2) In the next degassing method using the plasticizing device itself, when trying to increase the plasticizing ability, for example, the residence time of the resin in the screw is shortened so that the temperature of the raw material particles is sufficiently high inside the screw. As a result, it becomes difficult to reduce the voids between raw material particles, resulting in insufficient deaeration.
(3) 最後に挙げたスクリユの途中に真空部を設け
るベント方式の可塑化装置はコンパクトではあ
るが、スクリユ先端圧が高い場合にはベント部
から樹脂から噴出するいわゆるベントアツプ現
象が発生するため、かかる高先端圧の条件下で
使用する場合、吐出能力を下げて使用せざるを
得ない場合が多い。(3) The vent-type plasticizing equipment mentioned above, which has a vacuum part in the middle of the screw, is compact, but if the pressure at the screw tip is high, a so-called vent-up phenomenon occurs in which the resin ejects from the vent part. When used under conditions of such high tip pressure, it is often necessary to reduce the discharge capacity.
本発明は、以上の各問題点を解決するためにな
されたもので、可塑化装置の原料供給部を真空に
保つための簡易でコンパクトな真空シールを兼ね
た連続原料供給装置を提供しようとするものであ
る。 The present invention has been made to solve the above-mentioned problems, and aims to provide a simple and compact continuous raw material supply device that also serves as a vacuum seal for keeping the raw material supply section of a plasticizing device in a vacuum. It is something.
（問題点を解決するための手段）
このため、本発明は可塑化装置の原料供給口よ
り原料の流れに対して上流側に、原料の流動開始
点以上の温度に温調された原料供給回転体とそれ
を取り囲むケーシングを設けて加熱回転シール装
置を構成し、同加熱回転シール装置と可塑化装置
の固相樹脂原料供給部間の所望部位に気体吸引口
を設ける構造とし、これを上記問題点の解決手段
とするものである。(Means for Solving the Problems) For this reason, the present invention provides a raw material supply rotation whose temperature is controlled to a temperature equal to or higher than the flow start point of the raw material, on the upstream side of the raw material flow from the raw material supply port of the plasticizing device. A heating rotary sealing device is constructed by providing a body and a casing surrounding it, and a gas suction port is provided at a desired location between the heating rotary sealing device and the solid phase resin raw material supply section of the plasticizing device, which solves the above problem. This is a means of resolving this issue.
（作用）
原料供給回転体とケーシングからなる加熱回転
シール装置を樹脂が液相となる温度以上に高める
と、前記回転体とケーシングに接触した固相樹脂
の一部が液相になり、この液相樹脂により、回転
体とケーシング間の間隙をシールする結果、ホツ
パと可塑化装置原料供給部の通気を遮断する。こ
の間も原料樹脂の大半は固相のままで可塑化装置
原料供給部に円滑に供給される。このとき、樹脂
と共に入つてきた気体は可塑化装置原料供給部に
設けられた気体吸引口から真空吸引される。(Function) When the heating rotary sealing device consisting of the raw material supply rotor and the casing is heated to a temperature higher than the temperature at which the resin becomes liquid, a portion of the solid phase resin in contact with the rotor and the casing becomes a liquid phase, and this liquid The phase resin seals the gap between the rotating body and the casing, thereby blocking ventilation between the hopper and the raw material supply section of the plasticizing device. During this time, most of the raw material resin remains in the solid phase and is smoothly supplied to the raw material supply section of the plasticizing apparatus. At this time, the gas that has entered together with the resin is vacuum-suctioned from a gas suction port provided in the raw material supply section of the plasticizing device.
（実施例）
以下、本発明の実施例を図面について詳述す
る。第１図は本発明の一実施例を示し、図中１は
図示しない外部に装着されたヒータにより加熱さ
れるシリンダで、このシリンダ１の内部に樹脂移
送用のスクリユ２が装着されている。加熱された
シリンダ１のスクリユ駆動側すなわちスクリユ基
端側には、このスクリユ２内に原料を供給するた
めの原料供給口３が設けられている。４は原料５
は貯蔵するためのホツパで、このホツパ５と原料
供給口３の間には互いに噛み合つて回転可能でか
つ加熱可能な２個の原料供給回転体６，６′とそ
の回転体を取り囲む加熱ケーシング７とで構成さ
れる加熱回転シール装置１００が設けられてい
る。原料供給回路６，６′およびケーシング７に
は加熱媒体が通る孔８，８′，９が設けられてい
る。また、前記原料供給口３と加熱回転シール装
置１００の間の原料が重力落下する原料供給スロ
ート部にはシリンダ１と前記加熱回転シール装置
１００とを切り離すようにして筒状のスロート１
０が設けられており、スロート１０には内部に冷
却媒体を流すための孔１１が設けられている。(Example) Hereinafter, an example of the present invention will be described in detail with reference to the drawings. FIG. 1 shows an embodiment of the present invention. In the figure, reference numeral 1 denotes a cylinder heated by an externally mounted heater (not shown), and a screw 2 for transferring resin is mounted inside this cylinder 1. A raw material supply port 3 for supplying raw material into the screw 2 is provided on the screw drive side of the heated cylinder 1, that is, on the screw base end side. 4 is raw material 5
is a hopper for storage, and between this hopper 5 and the raw material supply port 3 are two raw material supply rotors 6 and 6' that are engaged with each other and can be rotated and heated, and a heating casing that surrounds the rotors. A heating rotary sealing device 100 is provided. The raw material supply circuits 6, 6' and the casing 7 are provided with holes 8, 8', 9 through which the heating medium passes. Further, a cylindrical throat 1 is provided at a raw material supply throat portion between the raw material supply port 3 and the heating rotary sealing device 100 where the raw material falls by gravity, so as to separate the cylinder 1 and the heating rotary sealing device 100.
0 is provided, and the throat 10 is provided with holes 11 for allowing a cooling medium to flow therein.
更に、本実施例では加熱回転シール装置１００
からスクリユ基部に至る間の原料が充満していな
い部分の空間に存在する気体を除去するために、
スクリユ基部に気体吸引口１２が設けられてい
る。 Furthermore, in this embodiment, the heating rotary sealing device 100
In order to remove the gas present in the space between the screw and the screw base that is not filled with raw materials,
A gas suction port 12 is provided at the base of the screw.
第２図は第１図に示した原料供給回転体６，
６′の一構造例を示すものでねじれ歯車形状をな
している。第３図および第４図は加熱回転シール
装置の他の実施例を示す断面図である。なお、こ
れらの図において、第１図に示した部分と同等の
機能を有する部分については、同一の符号を付し
ている。第３図は１軸の原料供給回転体６を有す
る加熱回転シール装置１００ａ、第４図は２つの
ギヤが噛みあつたギヤポンプの形を有する加熱回
転シール装置１００ｂを示し、いずれも回転体
６，６′とケーシング７には加熱媒体の通る孔８，
８′，９が設けられている。 FIG. 2 shows the raw material supply rotary body 6 shown in FIG.
6', which has a twisted gear shape. FIGS. 3 and 4 are cross-sectional views showing other embodiments of the heating rotary sealing device. In these figures, parts having the same functions as those shown in FIG. 1 are designated by the same reference numerals. FIG. 3 shows a heated rotary sealing device 100a having a uniaxial raw material supply rotary body 6, and FIG. 6' and the casing 7 have holes 8 through which the heating medium passes,
8' and 9 are provided.
なお、加熱回転シール装置からスクリユ基部に
至る間の原料が充満していない部分の空間に存在
する気体を除去するために設けられる前記気体吸
引口１２は、第１図に示すようにスクリユ基部に
近いシリンダ部イ、あるいはスクリユ基部である
ロ部、さらにはスロート１０のハ部に設けるよう
にしても良い。 The gas suction port 12, which is provided in order to remove the gas existing in the space between the heating rotary sealing device and the screw base that is not filled with raw materials, is located at the screw base as shown in FIG. It may be provided in a nearby cylinder part A, or in a part B which is the base of the screw, or further in a part C of the throat 10.
また、原料供給回転体６，６′およびケーシン
グ７の加熱には上記の如く加熱媒体を孔内に通す
ようなことをせずに、電熱ヒータなど他の加熱手
段を採用することもできる。 Further, for heating the raw material supply rotors 6, 6' and the casing 7, other heating means such as an electric heater may be used instead of passing a heating medium through the holes as described above.
以上の構成において、いま固形樹脂の原料５が
ホツパ４から加熱回転シール装置に達すると、原
料供給回転体６，６′と加熱シリンダ７が加熱さ
れているため、供給原料樹脂の一部が溶融して回
転体６，６′や加熱ケーシング７の表面に液相樹
脂層を形成し、原料供給回転体６，６′同志の噛
合隙間や同回転体６，６′と加熱ケーシング７間
の隙間をシールして気密性を保つ。しかし、この
様な状態にあつても殆んどの樹脂は固相樹脂粒の
ままで加熱回転シール装置１００を通過するの
で、可塑化装置の固相樹脂送り能力を阻害する要
因がなく、固相樹脂部での圧力発生は大きくなつ
て、吐出先端圧力を高くとることが出来るように
なる。また、脱気にあつても加熱回転シール装置
以後の原料供給部内の気密性が保たれるため、原
料供給部における気体の吸引をスムーズになしう
る。 In the above configuration, when the solid resin raw material 5 reaches the heating rotary sealing device from the hopper 4, a part of the raw material resin is melted because the raw material supply rotors 6, 6' and the heating cylinder 7 are heated. Then, a liquid phase resin layer is formed on the surfaces of the rotating bodies 6, 6' and the heating casing 7, and the meshing gap between the raw material supplying rotating bodies 6, 6' and the gap between the rotating bodies 6, 6' and the heating casing 7 are reduced. Seal to maintain airtightness. However, even in such a state, most of the resin passes through the heating rotary sealing device 100 as solid resin particles, so there is no factor that inhibits the solid resin feeding ability of the plasticizing device, and the solid phase resin particles remain as they are. The pressure generated in the resin portion increases, and the pressure at the discharge tip can be increased. Furthermore, even during deaeration, the airtightness within the raw material supply section after the heating rotary sealing device is maintained, so that gas can be smoothly sucked into the raw material supply section.
（発明の効果）
以上、詳細に説明した如く本発明によれば、ホ
ツパとシリンダの原料供給部間に原料樹脂の液相
体によるシール部を形成する簡易な構造の加熱回
転シール装置を介装するようにしたので、連続的
に原料供給が可能となり、加えて前記原料供給部
内の脱気も効率的に行なえるようになつて、溶融
樹脂中に気泡を含まない高圧吐出が可能な可塑化
装置が得られる。(Effects of the Invention) As described above in detail, according to the present invention, a heating rotary sealing device of a simple structure is interposed between the hopper and the raw material supply portion of the cylinder to form a seal portion using a liquid phase of raw material resin. As a result, raw materials can be continuously supplied, and in addition, the inside of the raw material supply section can be efficiently degassed, allowing plasticization to be performed at high pressure without bubbles in the molten resin. A device is obtained.
第１図は本発明の一実施例を示す樹脂可塑化装
置の側断面図、第２図は第１図で示した原料供給
回転体の斜視図、第３図及び第４図は本発明の他
の実施例を示す加熱回転シール装置の側断面図、
第５図は従来の多段真空ホツパ式可塑化装置の一
部を切開して示す概略側面図である。
図の主要部分の説明１……シリンダ、２……ス
クリユ、５……原料、６……原料供給回転体、７
……（加熱）ケーシング、１２……気体吸引口。
FIG. 1 is a side sectional view of a resin plasticizing apparatus showing an embodiment of the present invention, FIG. 2 is a perspective view of the raw material supply rotary body shown in FIG. 1, and FIGS. 3 and 4 are A side sectional view of a heating rotary sealing device showing another embodiment,
FIG. 5 is a schematic side view, partially cut away, of a conventional multi-stage vacuum hopper type plasticizing apparatus. Explanation of main parts of the diagram 1... Cylinder, 2... Screw, 5... Raw material, 6... Raw material supply rotating body, 7
... (heating) casing, 12 ... gas suction port.
Claims (1)
して上流側に、原料の流動開始点以上の温度に温
調された原料供給回転体と、それを取り囲むケー
シングを設けて加熱回転シール装置を構成し、同
加熱回転シール装置と可塑化装置の固相樹脂原料
供給部間の所望部位に気体吸引口を設けることを
特徴とする樹脂可塑化装置。1. A heating rotary sealing device is provided by providing a raw material supply rotor whose temperature is controlled to a temperature higher than the flow start point of the raw material and a casing surrounding it on the upstream side of the raw material flow from the raw material supply port of the plasticizing device. What is claimed is: 1. A resin plasticizing device comprising: a gas suction port provided at a desired location between the heating rotary sealing device and a solid-phase resin raw material supply section of the plasticizing device.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP61285955A JPS63139706A (en) | 1986-12-02 | 1986-12-02 | Resin plasticator |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP61285955A JPS63139706A (en) | 1986-12-02 | 1986-12-02 | Resin plasticator |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS63139706A JPS63139706A (en) | 1988-06-11 |
| JPH0576886B2 true JPH0576886B2 (en) | 1993-10-25 |
Family
ID=17698119
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP61285955A Granted JPS63139706A (en) | 1986-12-02 | 1986-12-02 | Resin plasticator |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS63139706A (en) |
Families Citing this family (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH07118987B2 (en) * | 1987-12-26 | 1995-12-20 | 東芝機械株式会社 | Raw material preheating device in plastic molding machine |
| CZ199997A3 (en) * | 1996-07-05 | 1998-02-18 | Paul Troester Maschinenfabrik | Two-stage extruding apparatus and extrusion process of rubber compounds and plastics |
| WO1999003660A1 (en) | 1997-07-18 | 1999-01-28 | Hiroshi Morohashi | Method and apparatus for molding plastic material and the like |
| JPH1148241A (en) * | 1997-08-06 | 1999-02-23 | Sumitomo Heavy Ind Ltd | Resin material feeding apparatus for molding machine |
| JP2007100224A (en) * | 2005-09-30 | 2007-04-19 | Toray Ind Inc | Apparatus and method for melting and extruding resin material |
-
1986
- 1986-12-02 JP JP61285955A patent/JPS63139706A/en active Granted
Also Published As
| Publication number | Publication date |
|---|---|
| JPS63139706A (en) | 1988-06-11 |
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