JPH04163015A - Plasticizing device - Google Patents
Plasticizing deviceInfo
- Publication number
- JPH04163015A JPH04163015A JP2287610A JP28761090A JPH04163015A JP H04163015 A JPH04163015 A JP H04163015A JP 2287610 A JP2287610 A JP 2287610A JP 28761090 A JP28761090 A JP 28761090A JP H04163015 A JPH04163015 A JP H04163015A
- Authority
- JP
- Japan
- Prior art keywords
- screw
- barrel
- function
- inner diameter
- diameter surface
- 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
- 238000010438 heat treatment Methods 0.000 claims abstract description 25
- 239000000463 material Substances 0.000 claims abstract description 22
- 230000007423 decrease Effects 0.000 claims description 10
- 239000012815 thermoplastic material Substances 0.000 claims description 4
- 238000002844 melting Methods 0.000 abstract description 18
- 230000008018 melting Effects 0.000 abstract description 18
- 238000002347 injection Methods 0.000 abstract description 10
- 239000007924 injection Substances 0.000 abstract description 10
- 239000011347 resin Substances 0.000 abstract description 10
- 229920005989 resin Polymers 0.000 abstract description 10
- 239000012768 molten material Substances 0.000 abstract description 5
- 238000010008 shearing Methods 0.000 abstract description 5
- 230000002093 peripheral effect Effects 0.000 abstract 3
- 239000007787 solid Substances 0.000 description 15
- 239000000155 melt Substances 0.000 description 13
- 238000010586 diagram Methods 0.000 description 9
- 230000020169 heat generation Effects 0.000 description 5
- 238000004040 coloring Methods 0.000 description 2
- 230000007547 defect Effects 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 238000000465 moulding Methods 0.000 description 2
- RNFJDJUURJAICM-UHFFFAOYSA-N 2,2,4,4,6,6-hexaphenoxy-1,3,5-triaza-2$l^{5},4$l^{5},6$l^{5}-triphosphacyclohexa-1,3,5-triene Chemical compound N=1P(OC=2C=CC=CC=2)(OC=2C=CC=CC=2)=NP(OC=2C=CC=CC=2)(OC=2C=CC=CC=2)=NP=1(OC=1C=CC=CC=1)OC1=CC=CC=C1 RNFJDJUURJAICM-UHFFFAOYSA-N 0.000 description 1
- 230000006835 compression Effects 0.000 description 1
- 238000007906 compression Methods 0.000 description 1
- 239000004020 conductor Substances 0.000 description 1
- 238000011109 contamination Methods 0.000 description 1
- 238000010924 continuous production Methods 0.000 description 1
- 238000000354 decomposition reaction Methods 0.000 description 1
- 239000003063 flame retardant Substances 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 230000001737 promoting effect Effects 0.000 description 1
- 230000002040 relaxant effect Effects 0.000 description 1
- 230000000630 rising effect Effects 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
- B29C45/00—Injection moulding, i.e. forcing the required volume of moulding material through a nozzle into a closed mould; Apparatus therefor
- B29C45/17—Component parts, details or accessories; Auxiliary operations
- B29C45/46—Means for plasticising or homogenising the moulding material or forcing it into the mould
- B29C45/53—Means for plasticising or homogenising the moulding material or forcing it into the mould using injection ram or piston
- B29C45/54—Means for plasticising or homogenising the moulding material or forcing it into the mould using injection ram or piston and plasticising screw
-
- 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
- B29C48/50—Details of extruders
- B29C48/505—Screws
- B29C48/52—Screws with an outer diameter varying along the longitudinal axis, e.g. for obtaining different thread clearance
-
- 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
- B29C48/475—Means for plasticising or homogenising the moulding material or forcing it through the nozzle or die using pistons, accumulators or press rams
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Manufacturing & Machinery (AREA)
- Injection Moulding Of Plastics Or The Like (AREA)
- Extrusion Moulding Of Plastics Or The Like (AREA)
Abstract
Description
【発明の詳細な説明】 く産業上の利用分野〉 本発明は、熱可塑性材料の可塑化装置に関する。[Detailed description of the invention] Industrial application fields> The present invention relates to an apparatus for plasticizing thermoplastic materials.
〈従来装置〉
この種可塑化装置の従来例を第５図および第６図により
説明すると、ホンパ１からノ（レル２の基部に設けた材
料供給口３よシ同バレル２内へ供給される熱可塑性材料
４は、前記・くシル２内で回転可能に挿着されたスクリ
ュ５により先端開口部６へ移送されながら、バレル２の
外側部に設けた加熱ヒータ７かもの熱を受け、溶解され
て、前記先端の開口部６から溶融材料として注出される
ようになっている。<Conventional Device> A conventional example of this type of plasticizing device will be explained with reference to FIGS. The thermoplastic material 4 is transferred to the tip opening 6 by the screw 5 rotatably inserted in the barrel 2, and is melted by receiving heat from the heater 7 provided on the outside of the barrel 2. The molten material is then poured out as a molten material from the opening 6 at the tip.
そして、スクリュ５は多くは基部から先端にかけてスク
リー溝が深く一定の供給ゾーンａ、次いで溝が漸次浅く
なっていく圧縮ゾーンｂ１続いて溝深さが浅く一定の計
量ゾーンＣで構成されていて通常第６図（ａ）および（
ｂ）に示すように溶融形態として周知である。The screw 5 usually consists of a supply zone a with a deep and constant scree groove from the base to the tip, a compression zone b where the groove gradually becomes shallower, and a metering zone C with a shallower groove depth. Figure 6(a) and (
It is well known as the molten form as shown in b).
即ち、第６図（ａ）ではスクリュ溝内で未溶鼾固体（ソ
リッドベツド）８と溶融体（メルト）９とが分離共存す
る形態を示し、溶融が進行するにつれて、スクリュ溝内
で形成されたソリッドペッド８はバレル２内壁との接触
面において、スクリュ溝内圧によりバレル内壁に押圧さ
れ、バレル内壁から受熱するとともに、スクリュ回転に
よるバレル内壁とソリッドベツドとの間の剪断作用によ
る材料樹脂の発熱により溶融し、メルトフィルム１０を
形成し、矢印ｄのように移動し、スクリュ溝の後部分に
メルト９として溜る（メルトプール）ようになっている
。従って、溶融はソリッドベツド８がバレル内壁との接
触面から順次行われる形態であシスフリユ溝の幅Ｗに対
するスクリュ溝中のソリ、ドベッド８の幅Ｘの割合とし
て示される未溶融比率Ｘ／Ｗが溶融の進行につれて次第
に小さくなっていく。この未溶融比率Ｘ／Ｗが小さくな
ることはソリッドベッド８自体の昇温に伴う剛性の変化
、メルト９の剪断接触等によシ前述の溶融形態はくずれ
、第５図（ｂ）に示すように、メルト９中に未溶融固体
片１１が浮遊した形態を示す。この形態はスクリュ５の
回転を大きくした高速可塑化の場合に顕著にあられれ、
成形品への未溶融物の混入に伴い成形品の強度のムラ、
色調の変化、カラーリング成形の色ムラ、流動性の変化
、気泡の混入等、多くの良くない結果を起す。That is, FIG. 6(a) shows a form in which an unmolten solid (solid bed) 8 and a melt (melt) 9 coexist separately in the screw groove, and as melting progresses, the solid bed forms in the screw groove. At the contact surface with the inner wall of the barrel 2, the solid ped 8 is pressed against the inner wall of the barrel by the internal pressure of the screw groove, and receives heat from the inner wall of the barrel, as well as heat generation of the material resin due to the shearing action between the inner wall of the barrel and the solid bed caused by the rotation of the screw. The melt is melted to form a melt film 10, which moves in the direction of arrow d and accumulates as melt 9 in the rear part of the screw groove (melt pool). Therefore, melting is performed sequentially from the contact surface of the solid bed 8 with the inner wall of the barrel. It gradually becomes smaller as melting progresses. This decrease in the unmelted ratio X/W is due to changes in the rigidity of the solid bed 8 itself due to temperature rise, shear contact of the melt 9, etc. The above-mentioned melting form is disrupted, as shown in FIG. 5(b). 2 shows a state in which unmelted solid pieces 11 are suspended in the melt 9. This form is noticeable in the case of high-speed plasticization where the rotation of the screw 5 is increased,
Unevenness in the strength of the molded product due to the contamination of unmelted materials into the molded product,
This causes many negative results such as changes in color tone, uneven coloring in coloring molding, changes in fluidity, and inclusion of air bubbles.
また、この形態が可塑化工程で発生しないように可塑化
能力を制約すること、即ち、サイクルや連続生産量を制
約することの原因になる。In addition, this form restricts the plasticizing ability so that it does not occur in the plasticizing process, that is, it becomes a cause of restricting the cycle and continuous production amount.
このような溶融形態の改善したものに、スクリュ溝底を
半径方向に変位させて通路断面積を変化させたものがあ
る。このように通路断面積を変化させることによシ、溶
融初期の第５図（ａ）の形態のソリッドペッド８を圧縮
、弛緩を繰シ返すことによシ、ソリッドベツド８に強い
抑圧作用を与えて変形させたシ、メルト９のみを優先的
に前方へ移送し溶融の効率をはかろうとするものである
。この溶融形態は溶融の初期では溶融促進の効果があシ
、溶融の後期の未溶融固体片１１が浮遊する段階ではス
クリュ溝をより浅くして未溶融固体片１１を選別的に溶
融するという効果がある。An example of such an improved melting pattern is one in which the bottom of the screw groove is displaced in the radial direction to change the cross-sectional area of the passage. By changing the cross-sectional area of the passage in this way, and by repeatedly compressing and relaxing the solid bed 8 in the form shown in FIG. This is intended to improve the efficiency of melting by preferentially transporting only the melt 9 that has been given and deformed to the front. This melting form has the effect of promoting melting in the early stage of melting, but in the latter stage of melting when unmelted solid pieces 11 float, the screw groove is made shallower to selectively melt the unmelted solid pieces 11. There is.
〈発明が解決しようとする課題〉
しかしながら、前述のようにソリッドベツドはソリッド
ベツドの外周から熱伝導による昇温か期待できるのみで
、しかも、材料樹脂は熱の不良導体であり、多くは期待
出来ないという溶融メカニズムの欠点がある。そして、
従来のスクリュは周速が一定のため周速を上げるとスク
リュ内剪断発熱は大きくなるが、外部加熱が少くなり、
溶融不良による成形不良およびスクリュのカジリの原因
となる。また供給ゾーンａの硬い材料とスクリュ回転と
の摩擦発熱が犬きくなシ、スクリュ表面温度が高く、材
料樹脂が付着し、材料樹脂のバレル内への噴込が不安定
になりやすい。逆に周速を下げると外部加熱は受は易く
なるが、スクリュの溶融開始位置における内部剪断作用
が少く、十分な可塑化が得られないし、可塑化時間が長
く、サイクルの短縮が出来ない。また高粘度樹脂では計
量ゾーンＣにおけるフリクションヒートが犬きくなシ樹
脂温度が高くなるし、難燃材等、熱安定の悪イ樹脂では
分解ヤケの原因となる。さらに、スクリュ溝底面が常に
バレル内径面と平行な形状となっているので、供給ゾー
ンではメルトフィルムがメルトプールへ送り出された後
、メルトフイルムの下部のソリンドベソドが積極的にバ
レル内面に押し上げる力が小さく、熱伝導の悪いメルト
フィルムの厚さが増すことになり、溶融不良となる欠点
がある。<Problems to be Solved by the Invention> However, as mentioned above, with solid beds, we can only expect a rise in temperature due to heat conduction from the outer periphery of the solid bed, and moreover, the material resin is a poor conductor of heat, so much cannot be expected. There is a drawback to the melting mechanism. and,
Conventional screws have a constant circumferential speed, so increasing the circumferential speed increases shear heat generation within the screw, but reduces external heating.
This may cause molding defects and screw galling due to insufficient melting. In addition, frictional heat generation between the hard material in the supply zone a and the rotation of the screw increases, the surface temperature of the screw is high, the material resin adheres, and the injection of the material resin into the barrel tends to become unstable. On the other hand, if the circumferential speed is lowered, it becomes easier to receive external heating, but the internal shearing action at the melting start position of the screw is small, so sufficient plasticization cannot be obtained, the plasticization time is long, and the cycle cannot be shortened. Furthermore, in the case of a high viscosity resin, the friction heat in the metering zone C will increase the temperature of the resin, and in the case of a resin with poor thermal stability, such as a flame retardant material, decomposition and burning may occur. Furthermore, since the bottom of the screw groove is always parallel to the inner surface of the barrel, in the supply zone, after the melt film is fed into the melt pool, the solindobeso at the bottom of the melt film actively pushes it up against the inner surface of the barrel. This increases the thickness of the melt film, which is small and has poor thermal conductivity, resulting in poor melting.
本発明の目的は、前述の欠点を取除き溶融メカニズムが
改善出来るスクリュ溝を有するスクリュを備えた可塑化
装置を提供することである。The object of the present invention is to provide a plasticizing device equipped with a screw having a screw groove, which eliminates the above-mentioned drawbacks and improves the melting mechanism.
〈課題を解決するための手段〉 ゛
前述の目的を達成するため、本発明は軸線に対し、内径
面が任意の関数の回転体面のバレルと、外形面が前記バ
レルの内径面と僅かな隙間を保ちつつ軸線を中心に回転
する回転体であり、園外形而上に軸方向の断面で軸線と
平行な底部でバレル内径面との間に所定の空隙部が形成
される螺旋状の溝を設けたスクリュと、前記バレルに設
けられ、バレル内に熱可塑性材料を供給するためのホッ
パと、バレルの外側面に設けられ、バレル内に供給され
る材料を加熱するための加熱装置と、前記スクリュの回
転駆動用の駆動装置を有することを特徴とする可塑化装
置とした。また前記スクリュの螺旋状の溝に代えて、軸
に対して平行な螺旋状の連続面としたこ・とを特徴とす
る請求
の可塑化装置とし、さらに前記バレルの内径面の任意の
関数は前半が直径が増加する関数、後半が直径が減少す
る関数であることを特徴とする前記請求項１）および２
）記載の可塑化装置とし、さらに前記バレル内径面の任
意の関数は円の一部であることを特徴とする前記請求項
１）ないし３）記載の可塑化装置とした。また前記バレ
ルの内径面の任意の関数は長円の一部であることを特徴
とする請求項υないし３）記載の可塑化装置とし、さら
に前記バレルの内径面の任意の関数は直径が増加する関
数と直径が減少する関数との間に直径が一定となる関数
を設けたことを特徴とする請求項１）ないしの記載の可
塑化装置とした。<Means for Solving the Problems> In order to achieve the above-mentioned object, the present invention provides a barrel whose inner diameter surface is a rotating body surface having an arbitrary function with respect to the axis, and whose outer diameter surface has a slight clearance from the inner diameter surface of the barrel. It is a rotating body that rotates around the axis while maintaining the same, and is provided with a spiral groove on the outside that forms a predetermined gap between the bottom part parallel to the axis line and the inner diameter surface of the barrel in the axial cross section. a hopper provided on the barrel for supplying thermoplastic material into the barrel; a heating device provided on the outer surface of the barrel for heating the material supplied into the barrel; The plasticizing apparatus is characterized in that it has a drive device for rotational driving. The plasticizing device according to the present invention is characterized in that the spiral groove of the screw is replaced with a continuous spiral surface parallel to the axis, and further, an arbitrary function of the inner diameter surface of the barrel is Claims 1) and 2 above, wherein the first half is a function in which the diameter increases, and the second half is a function in which the diameter decreases.
The plasticizing apparatus according to any one of claims 1) to 3) is further characterized in that the arbitrary function of the inner diameter surface of the barrel is a part of a circle. The plasticizing device according to claim 3), wherein the arbitrary function of the inner diameter surface of the barrel is a part of an ellipse, and further, the arbitrary function of the inner diameter surface of the barrel increases in diameter. The plasticizing device according to any one of claims 1 to 7, characterized in that a function in which the diameter becomes constant is provided between the function in which the diameter decreases and the function in which the diameter decreases.
〈作 用〉
本発明においてはスクリュの各部における周速が異なる
、即ちスクリュの材料供給側およびスクリュ先端側は周
速が低く、スクリュ中央部は周速が早いため、ホッパの
材料供給口近傍では低周速のため外部加熱を受は易く、
無理な剪断発熱が生れず、スクリュ表面温度は上らずに
安定し、材料のバレル内への噴込が安定する。またスク
リュ中央部においては周速が高く、前述の材料供給口附
近で予熱作用を十分に受けているので、スクリュ内の剪
断作用によシ材料は徐々に軟化、溶融がスムーズに効率
よく行われ、スクリュ先端になると再び周速が低くなる
ので、内部発熱が抑えられる。<Function> In the present invention, the circumferential speed at each part of the screw is different, that is, the circumferential speed is low on the material supply side and the screw tip side, and the circumferential speed is high in the center of the screw. Due to the low circumferential speed, it is easily susceptible to external heating.
Undue shear heat generation is not generated, the screw surface temperature remains stable without rising, and material is stably injected into the barrel. In addition, the circumferential speed in the center of the screw is high and the material is sufficiently preheated near the material supply port mentioned above, so the material gradually softens and melts smoothly and efficiently due to the shearing action within the screw. At the tip of the screw, the circumferential speed decreases again, so internal heat generation is suppressed.
材料の均温化に効果的である。Effective for equalizing the temperature of materials.
く実施例〉
次に第１図により本発明の１実施例をバレルの内径面が
球面である場合を例に採シ説明する。Embodiment> Next, an embodiment of the present invention will be described with reference to FIG. 1, taking as an example the case where the inner diameter surface of the barrel is a spherical surface.
ホッパ２０に投入された材料樹脂２１は材料供給口２２
から、球面状の内径面を有する加熱バレル２３内へ供給
され外形面が前記加熱バレル２３の内径面と僅かな隙間
を保ちつつ、油圧モータ２４により軸線Ａを中心に回転
し、前記外形面上に軸方向の断面で軸線と平行な底部で
加熱バレル内径面との間に所定の空隙部が形成される螺
旋状の溝２５を設けたスクリュ２６により加熱バレル２
３の外側面に設けたヒータ２７からの熱と、スクリュ２
６による剪断作用により溶融されながら図中下方へ移動
され、射出シリンダ２８のプランジャ２９の前方の空間
部３０へ所定量だけ計量蓄積されるようになっている。The material resin 21 put into the hopper 20 is fed to the material supply port 22
is supplied into the heating barrel 23 having a spherical inner diameter surface, and is rotated around the axis A by the hydraulic motor 24 while maintaining a slight gap between the outer diameter surface and the inner diameter surface of the heating barrel 23, and the outer diameter surface is rotated around the axis A. The heating barrel 2 is attached to the heating barrel 2 by a screw 26 provided with a spiral groove 25 that forms a predetermined gap between the bottom parallel to the axis and the inner diameter surface of the heating barrel in an axial cross section.
The heat from the heater 27 provided on the outer surface of the screw 2
It is moved downward in the drawing while being melted by the shearing action of the injection cylinder 28, and a predetermined amount is stored in the space 30 in front of the plunger 29 of the injection cylinder 28.
そして空間部３０へ計量蓄積された溶融材料は、射出シ
リンダ２８の先端に取付たノズル３１から、射出シリン
ダ２８に作用する油だによりプランジャ２９が前進し（
図中左行する）て、図示してない金型キャビティ等に射
出されるようになっている。なお、３２はチエツク弁で
溶融材料が加熱バレル２３側からは流れるが、射出シリ
ンダ２８側からは加熱バレル２３側ヘ流れないようにし
ている。 ゛
前記実施例において、加熱バレルの内径面は球状面、即
ち、軸線に対し円を回転させた回転体面としたが、これ
に限らず、バレル内径面を第２図のように軸線に対して
楕円を回転させた楕円面としそれに挿入されたスクリュ
４０、第３図のように加熱バレル内径面を軸線に対して
回転させる関数を曲線ばかシでなく前半が直径が増加す
る直線、後半が直径が減少する直線とすることも出来、
それ用のスクリー４２とすることも出来る。また、直径
が増加する関数と直径が減少する関数の間に直径が一定
な関数を組合せ、軸線に対して回転させた加熱バレル内
径面であっても良い。The molten material measured and accumulated in the space 30 is transferred from the nozzle 31 attached to the tip of the injection cylinder 28, and the plunger 29 is moved forward by the oil drip acting on the injection cylinder 28 (
(on the left in the figure) and is injected into a mold cavity, etc. (not shown). Note that 32 is a check valve that allows the molten material to flow from the heating barrel 23 side, but prevents it from flowing from the injection cylinder 28 side to the heating barrel 23 side.゛In the above embodiments, the inner diameter surface of the heating barrel was a spherical surface, that is, a rotating body surface rotated in a circle with respect to the axis, but the invention is not limited to this. The screw 40 inserted into the ellipsoid is a rotated ellipse, and as shown in Figure 3, the function that rotates the inner diameter surface of the heating barrel with respect to the axis is not a curved line, but a straight line in which the diameter increases in the first half, and the diameter in the second half. It can also be a straight line that decreases,
It is also possible to use a screen 42 for this purpose. Alternatively, the inner diameter surface of the heating barrel may be formed by combining a function in which the diameter is constant between a function in which the diameter increases and a function in which the diameter decreases.
そして、スクリュも外形面に螺旋状溝を設けた例ばかり
でなく、第４図のように軸に対して平行な螺旋状の連続
面４３としたスクリュ４２でも良い。The screw is not limited to a screw having a spiral groove on its outer surface, but may also be a screw 42 having a continuous spiral surface 43 parallel to the axis as shown in FIG.
〈発明の効果〉
スクリュの各部の周速を変えることにより、当初に掲げ
た溶融メカニズムの欠点を改善することが出来る。<Effects of the Invention> By changing the circumferential speed of each part of the screw, the defects of the melting mechanism mentioned at the beginning can be improved.
第１図は本発明の１実施例を示す図で、加熱バレルの内
径面を球面とした例を示す可塑化装置の図。第２図は他
の実施例を示す図で、加熱バレルの内径面が楕円面で、
それに挿入されたスクリュ４０を示す図。第３図はさら
に他の実施例を示す図で加熱バレルの内径面が前半は直
径が増加する直線、後半が直径が減少する直線を回転さ
せた回転体面であり、それに挿入されるスクリュ４１を
示す図。第４図はスクリュの外形面に幡旋溝の代りに軸
に対して平行な螺旋状の連続面を設けた本発明の他の実
施例であるスクリュ４２を示した図。第５図は従来の可
塑化装置の図。笛６図は従来のスクリュの溶融メカニズ
ムを説明した図で、第６図（ａ）はスクリュ溝内におけ
るソリッドベツドとメルトが共存する形態を示す図。第
６図（ｂ）はスクリュ溝内の溶融形態がくづれメルトに
未溶融固体片が浮遊した形態を説明した図。
２３・・・加熱バレル、２６．４０．４１．４２・・・
スクリュ、２８・・・射出シリンダ、３１・・・ノズル
。FIG. 1 is a diagram showing one embodiment of the present invention, and is a diagram of a plasticizing device in which the inner diameter surface of the heating barrel is spherical. FIG. 2 is a diagram showing another embodiment, in which the inner diameter surface of the heating barrel is an elliptical surface,
The figure which shows the screw 40 inserted into it. FIG. 3 is a diagram showing still another embodiment, in which the inner diameter surface of the heating barrel is a rotating body surface in which the first half is a straight line in which the diameter increases and the second half is a rotating straight line in which the diameter decreases. Figure shown. FIG. 4 is a diagram showing a screw 42 according to another embodiment of the present invention, in which a spiral continuous surface parallel to the axis is provided on the outer surface of the screw instead of a convoluted groove. FIG. 5 is a diagram of a conventional plasticizing device. Figure 6 is a diagram explaining the melting mechanism of a conventional screw, and Figure 6(a) is a diagram showing a form in which solid bed and melt coexist in the screw groove. FIG. 6(b) is a diagram illustrating a state in which the melt in the screw groove collapses and unmelted solid pieces float in the melt. 23...Heating barrel, 26.40.41.42...
Screw, 28... Injection cylinder, 31... Nozzle.
Claims (1)
ルと、外形面が前記バレルの内径面と僅かな隙間を保ち
つつ軸線を中心に回転する回転体であり、同外形面上に
軸方向の断面で軸線と平行な底部でバレル内径面との間
に所定の空隙部が形成される螺旋状の溝を設けたスクリ
ュと、前記バレルに設けられ、バレル内に熱可塑性材料
を供給するためのホッパと、バレルの外側面に設けられ
、バレル内に供給される材料を加熱するための加熱装置
と、前記スクリュの回転駆動用の駆動装置を有すること
を特徴とする可塑化装置。 ２）前記スクリュの螺旋状の溝に代えて、軸に対して平
行な螺旋状の連続面としたことを特徴とする前記請求項
１）記載の可塑化装置。 ３）前記バレルの内径面の任意の関数は前半が直径が増
加する関数、後半が直径が減少する関数であることを特
徴とする前記請求項１）および２）記載の可塑化装置。 ４）前記バレル内径面の任意の関数は円の一部であるこ
とを特徴とする前記請求項１）ないし３）記載の可塑化
装置。 ５）前記バレルの内径面の任意の関数は楕円の一部であ
ることを特徴とする請求項１）ないし３）記載の可塑化
装置。 ６）前記バレルの内径面の任意の関数は直径が増加する
関数と直径が減少する関数との間に直径が一定となる関
数を設けたことを特徴とする前記請求項１）ないし５）
記載の可塑化装置。[Scope of Claims] 1) A barrel whose inner diameter surface is a rotating body surface having an arbitrary function with respect to the axis, and a rotating body whose outer diameter surface rotates around the axis while maintaining a slight clearance from the inner diameter surface of the barrel. , a screw provided with a spiral groove on the same outer surface, the bottom of which is parallel to the axis in the axial cross section, and a predetermined gap is formed between the inner diameter surface of the barrel; a hopper for supplying thermoplastic material to the barrel; a heating device provided on the outer surface of the barrel for heating the material supplied into the barrel; and a drive device for rotationally driving the screw. plasticizing equipment. 2) The plasticizing device according to claim 1, wherein the screw has a continuous spiral surface parallel to the axis in place of the spiral groove. 3) The plasticizing device according to claims 1) and 2), wherein the arbitrary function of the inner diameter surface of the barrel is a function in which the diameter increases in the first half and a function in which the diameter decreases in the latter half. 4) The plasticizing device according to any one of claims 1) to 3), wherein the arbitrary function of the inner diameter surface of the barrel is a part of a circle. 5) The plasticizing device according to claim 1, wherein the arbitrary function of the inner diameter surface of the barrel is a part of an ellipse. 6) Any function of the inner diameter surface of the barrel is characterized in that a function in which the diameter is constant is provided between a function in which the diameter increases and a function in which the diameter decreases.
The plasticizing device described.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2287610A JP2646154B2 (en) | 1990-10-25 | 1990-10-25 | Plasticizer |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2287610A JP2646154B2 (en) | 1990-10-25 | 1990-10-25 | Plasticizer |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH04163015A true JPH04163015A (en) | 1992-06-08 |
| JP2646154B2 JP2646154B2 (en) | 1997-08-25 |
Family
ID=17719502
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP2287610A Expired - Fee Related JP2646154B2 (en) | 1990-10-25 | 1990-10-25 | Plasticizer |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2646154B2 (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0861716A2 (en) * | 1997-02-27 | 1998-09-02 | Mitsubishi Heavy Industries, Ltd. | Injection unit for injection molding machine |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH01127725U (en) * | 1988-02-22 | 1989-08-31 |
-
1990
- 1990-10-25 JP JP2287610A patent/JP2646154B2/en not_active Expired - Fee Related
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH01127725U (en) * | 1988-02-22 | 1989-08-31 |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0861716A2 (en) * | 1997-02-27 | 1998-09-02 | Mitsubishi Heavy Industries, Ltd. | Injection unit for injection molding machine |
| US6030203A (en) * | 1997-02-27 | 2000-02-29 | Mitsubishi Heavy Industries, Ltd. | Injection unit for injection molding machine |
| EP0861716A3 (en) * | 1997-02-27 | 2000-12-20 | Mitsubishi Heavy Industries, Ltd. | Injection unit for injection molding machine |
Also Published As
| Publication number | Publication date |
|---|---|
| JP2646154B2 (en) | 1997-08-25 |
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