JP2813254B2 - Injection molding machine screw - Google Patents
Injection molding machine screwInfo
- Publication number
- JP2813254B2 JP2813254B2 JP18759691A JP18759691A JP2813254B2 JP 2813254 B2 JP2813254 B2 JP 2813254B2 JP 18759691 A JP18759691 A JP 18759691A JP 18759691 A JP18759691 A JP 18759691A JP 2813254 B2 JP2813254 B2 JP 2813254B2
- Authority
- JP
- Japan
- Prior art keywords
- screw
- section
- molding material
- injection molding
- molding machine
- 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
Landscapes
- Injection Moulding Of Plastics Or The Like (AREA)
Description
【０００１】[0001]
【産業上の利用分野】本発明は、射出成形機のスクリュ
に関するものである。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a screw for an injection molding machine.
【０００２】[0002]
【従来の技術】従来、加熱シリンダ内で加熱され流動化
された成形材料を高圧で金型内に射出し、その中で冷却
し、固化又は硬化させ、次いで金型を開いて成形品を取
り出すようにした射出成形機においては、上記金型内に
成形材料を射出する前に、射出量を計量しておく必要が
ある。2. Description of the Related Art Conventionally, a molding material heated and fluidized in a heating cylinder is injected into a mold at a high pressure, cooled therein, solidified or hardened, and then the mold is opened to take out a molded product. In such an injection molding machine, it is necessary to measure the injection amount before injecting the molding material into the mold.
【０００３】上記射出成形機には、プランジャを前後進
させて射出成形するプランジャ式のものと、スクリュを
前後進させて射出成形するスクリュ式のものなどがある
が、上記計量は、スクリュ又はプランジャを後方に後退
させながら行われる。図２は従来の射出成形機の射出装
置の断面図である。図において、３１は加熱シリンダ、
３２は該加熱シリンダ３１内において回転自在かつ進退
自在に支持されたスクリュである。ホッパ３３から供給
された成形材料３４はスクリュ３２の回転に伴い、溝３
５に案内されて供給部３６、圧縮部３７及び計量部３８
を介して前方に移動し、スクリュ３２の先端に蓄えられ
る。There are two types of injection molding machines: a plunger type in which a plunger is moved forward and backward to perform injection molding, and a screw type in which a screw is moved forward and backward to perform injection molding. Is performed while moving backward. FIG. 2 is a sectional view of an injection device of a conventional injection molding machine. In the figure, 31 is a heating cylinder,
Reference numeral 32 denotes a screw supported rotatably and advancing and retracting in the heating cylinder 31. The molding material 34 supplied from the hopper 33 causes the grooves 3
5, the supply unit 36, the compression unit 37, and the measurement unit 38
, And is stored at the tip of the screw 32.
【０００４】該スクリュ３２は駆動スプライン軸３９、
伝達機構４０を介して射出用モータ４１に連結されてお
り、また、駆動スプライン軸３９に形成されているねじ
４２が固定ナット４３と係合しているため、上記射出用
モータ４１を回転させることによってスクリュ３２を回
転させながら前後に移動させることができる。また、上
記駆動スプライン軸３９にはスプライン３９ａが形成さ
れ、歯車４５を介してスクリュモータ４６に連結されて
いる。The screw 32 has a driving spline shaft 39,
It is connected to the injection motor 41 via the transmission mechanism 40, and the screw 42 formed on the drive spline shaft 39 is engaged with the fixed nut 43, so that the injection motor 41 is rotated. Thus, the screw 32 can be moved back and forth while rotating. A spline 39 a is formed on the driving spline shaft 39, and is connected to a screw motor 46 via a gear 45.
【０００５】ここで、該スクリュモータ４６を駆動して
スクリュ３２を回転させると、上記ホッパ３３から供給
された成形材料３４は供給部３６で発生する摩擦供給力
によって前方へ圧送され、溝３５の体積が減少させられ
た圧縮部３７において更に圧縮されながら加熱シリンダ
３１によって加熱され、溶融して計量部３８に送られ、
該計量部３８において所定量ずつスクリュ３２の先端に
溜められる。When the screw motor 46 is driven to rotate the screw 32, the molding material 34 supplied from the hopper 33 is fed forward by the frictional supply force generated in the supply section 36, Heated by the heating cylinder 31 while being further compressed in the compression section 37 whose volume has been reduced, melted and sent to the measuring section 38,
The measuring unit 38 accumulates a predetermined amount at the tip of the screw 32.
【０００６】[0006]
【発明が解決しようとする課題】しかしながら、上記従
来の射出成形機のスクリュにおいては、可塑化時におけ
る容積の減少が少ない成形材料３４や、溶融した状態に
おける粘性が高い成形材料３４を使用する場合に、スク
リュ回転トルクが高くなって安定した計量を行うことが
できず、十分な脱気を行うことができないことがある。However, in the screw of the above-mentioned conventional injection molding machine, when a molding material having a small decrease in volume during plasticization or a molding material having a high viscosity in a molten state is used. In addition, the screw rotation torque is increased, so that stable measurement cannot be performed, and sufficient degassing may not be performed.
【０００７】すなわち、フェノール樹脂、メラミン樹
脂、ジアリルフタレート樹脂等の熱硬化性樹脂を使用す
る場合や、セラミック粉末や金属粉末に有機バインダを
加えた粉末成形材料を使用する場合には、可塑化時に成
形材料３４の容積があまり減少しないため、供給部３６
から圧縮部３７への成形材料３４の流れが円滑にならな
い。That is, when a thermosetting resin such as a phenol resin, a melamine resin, or a diallyl phthalate resin is used, or when a powder molding material in which an organic binder is added to a ceramic powder or a metal powder is used, plasticization is not possible. Since the volume of the molding material 34 does not decrease so much,
The flow of the molding material 34 from the to the compression part 37 is not smooth.
【０００８】また、耐熱グレード樹脂及び超高分子量ポ
リエチレン樹脂を使用する場合や、ポリメタクリル酸メ
チル、ポリカーボネート等のエンプラ樹脂を使用する場
合にも、溶融状態の成形材料３４の粘性が高く、供給部
３６から圧縮部３７への成形材料３４の流れが円滑にな
らない。したがって、スクリュモータ４６を駆動してス
クリュ３２を回転させようとすると、スクリュ回転トル
クが高くなってしまう。Also, when a heat-resistant grade resin and an ultrahigh molecular weight polyethylene resin are used, or when an engineering plastic resin such as polymethyl methacrylate or polycarbonate is used, the viscosity of the molten molding material 34 is high, and The flow of the molding material 34 from 36 to the compression section 37 is not smooth. Therefore, when the screw 32 is rotated by driving the screw motor 46, the screw rotation torque increases.
【０００９】そこで、スクリュ回転トルクを低減させる
ために、スクリュ３２の計量部３８と供給部３６の溝深
さの差を小さくして圧縮比を抑制するようにしている。
ところが、計量部３８の溝深さを一定とし、供給部３６
の溝深さを小さくすると、供給部３６における成形材料
３４の移送量が不安定となり、計量時間がばらつきやす
くなる。また、成形材料３４は圧縮部３７に至る前に溶
融が開始されるため脱気が不十分となる。一方、供給部
３６の溝深さを一定として、計量部３８の溝深さを大き
くする場合、計量部３８における成形材料３４の混練性
が不足し、未溶融成形材料や色むらが発生しやすくなっ
てしまう。Therefore, in order to reduce the screw rotation torque, the difference in groove depth between the metering section 38 and the supply section 36 of the screw 32 is reduced to suppress the compression ratio.
However, when the groove depth of the measuring section 38 is fixed,
When the groove depth is reduced, the transfer amount of the molding material 34 in the supply unit 36 becomes unstable, and the measuring time tends to vary. In addition, the melting of the molding material 34 is started before the molding material 34 reaches the compression section 37, so that degassing becomes insufficient. On the other hand, when the groove depth of the supply unit 36 is kept constant and the groove depth of the measurement unit 38 is increased, the kneading property of the molding material 34 in the measurement unit 38 is insufficient, and unmelted molding material and color unevenness easily occur. turn into.
【００１０】本発明は、上記従来の射出成形機のスクリ
ュの問題点を解決し、可塑化時のスクリュ回転トルクを
低減し、供給部から圧縮部への成形材料の流れを円滑に
し、かつ、十分に脱気を行うことができるとともに、未
溶融成形材料や色むらの発生を防止することができる射
出成形機のスクリュを提供することを目的とする。The present invention solves the above-mentioned problems of the screw of the conventional injection molding machine, reduces the screw rotation torque during plasticization, makes the flow of molding material from the supply section to the compression section smooth, and An object of the present invention is to provide a screw of an injection molding machine that can sufficiently perform degassing and can prevent generation of unmelted molding material and color unevenness.
【００１１】[0011]
【課題を解決するための手段】そのために、本発明の射
出成形機のスクリュにおいては、長さ方向の全体にフラ
イトを形成しており、後端から先端にかけて供給部、圧
縮部及び計量部を形成している。そして、該計量部の溝
径を供給部の溝径より大きくし、該供給部のリード長さ
とスクリュ径の比を ０．８〜１．０ の範囲として、上記計量部のリード長さとスクリュ径の
比より小さく設定する。For this purpose, in the screw of the injection molding machine according to the present invention, a flight is formed in the entire lengthwise direction, and a supply section, a compression section and a metering section are formed from the rear end to the front end. Has formed. The groove diameter of the measuring section is made larger than the groove diameter of the supply section, and the ratio of the lead length of the supply section to the screw diameter is set in the range of 0.8 to 1.0, and the lead length of the measuring section and the screw diameter are set. Set smaller than the ratio of.
【００１２】あるいは、上記計量部のリード長さとスク
リュ径の比を １．０〜１．３ の範囲として、上記供給部のリード長さとスクリュ径の
比より大きく設定する。Alternatively, the ratio between the lead length of the metering section and the screw diameter is set in the range of 1.0 to 1.3, and is set to be larger than the ratio of the lead length of the supply section to the screw diameter.
【００１３】[0013]
【作用】本発明によれば、上記のように加熱シリンダ内
を回転自在かつ前後進自在に配設されるスクリュの長さ
方向の全体にフライトが形成されており、後端から先端
にかけて供給部、圧縮部及び計量部を形成している。そ
して、該計量部の溝径を供給部の溝径より大きくし、ホ
ッパから落下した成形材料は供給部から圧縮部に移動
し、該圧縮部において圧縮され、加熱されて容積を減少
して計量部に至り、該計量部から所定量ずつスクリュの
先端に溜められる。According to the present invention, a flight is formed in the entire lengthwise direction of the screw, which is rotatably and forwardly and backwardly movable in the heating cylinder as described above, and the supply section extends from the rear end to the front end. , A compression section and a measuring section. Then, the groove diameter of the measuring section is made larger than the groove diameter of the supply section, and the molding material dropped from the hopper moves from the supply section to the compression section, is compressed in the compression section, heated and reduced in volume to measure. And a predetermined amount is stored at the tip of the screw from the measuring section.
【００１４】ここで、上記供給部のリード長さとスクリ
ュ径の比を ０．８〜１．０ の範囲として、上記計量部のリード長さとスクリュ径の
比より小さく設定するか、上記計量部のリード長さとス
クリュ径の比を １．０〜１．３ の範囲として、上記供給部のリード長さとスクリュ径の
比より大きく設定する。Here, the ratio of the lead length of the supply section to the screw diameter is set in the range of 0.8 to 1.0, and is set to be smaller than the ratio of the lead length of the measurement section to the screw diameter, or The ratio between the lead length and the screw diameter is set to be in the range of 1.0 to 1.3, and is set to be larger than the ratio between the lead length and the screw diameter of the supply section.
【００１５】したがって、供給部に比較して計量部のリ
ード長さが長くなるので、可塑化時における容積の減少
が少ない成形材料や、溶融した状態における粘性が高い
成形材料を使用する場合においても、比較的円滑に計量
部に移動させることができる。Therefore, since the lead length of the measuring section is longer than that of the supply section, even when a molding material having a small decrease in volume during plasticization or a molding material having a high viscosity in a molten state is used. , Can be relatively smoothly moved to the measuring section.
【００１６】[0016]
【実施例】以下、本発明の実施例について図面を参照し
ながら詳細に説明する。図１は本発明の射出成形機のス
クリュの概略図である。図において、１１はスクリュ、
１２は該スクリュ１１の長手方向の全体にわたって形成
されたフライト、１３は該フライト１２の各ターン間に
形成された溝である。Embodiments of the present invention will be described below in detail with reference to the drawings. FIG. 1 is a schematic view of a screw of an injection molding machine according to the present invention. In the figure, 11 is a screw,
Reference numeral 12 denotes a flight formed over the entire length of the screw 11, and reference numeral 13 denotes a groove formed between turns of the flight 12.
【００１７】１４は上記スクリュ１１の後端側に形成さ
れた供給部、１５は圧縮部である。図示しないホッパか
ら落下した固形の成形材料は、上記供給部１４に供給さ
れ、上記溝１３内を前方に進みながら加熱シリンダによ
って加熱され、圧縮部１５に進む。該圧縮部１５におい
ては、上記フライト１２の溝深さが次第に浅くなり、上
記成形材料は圧縮状態で溶融して容積を減少し、前方に
移動する。また、１６は上記圧縮部１５に隣接して形成
される計量部である。該計量部１６においては、圧縮部
１５において溶融された成形材料が更に溶融させられ、
所定量ずつスクリュ１１の先端に送られるようになって
いる。Reference numeral 14 denotes a supply section formed on the rear end side of the screw 11, and 15 denotes a compression section. The solid molding material dropped from a hopper (not shown) is supplied to the supply unit 14, heated by the heating cylinder while traveling forward in the groove 13, and proceeds to the compression unit 15. In the compression section 15, the groove depth of the flight 12 gradually becomes shallower, and the molding material melts in a compressed state to reduce the volume, and moves forward. Reference numeral 16 denotes a measuring section formed adjacent to the compression section 15. In the measuring section 16, the molding material melted in the compression section 15 is further melted,
A predetermined amount is sent to the tip of the screw 11.
【００１８】ところで、上記構成のスクリュ１１におけ
るスクリュ圧縮比ＣＲは以下の式で示される。 ＣＲ＝ｈf （Ｄ−ｈf ）・ｌf ／ｈm （Ｄ−ｈm ）・ｌm … （１） Ｄ ：スクリュ径 ｈf ：供給部１４の溝深さ ｄf ：供給部１４の溝径 ｌf ：供給部１４のリード長さ ｈm ：計量部１６の溝深さ ｄm ：計量部１６の溝径 ｌm ：計量部１６のリード長さ ここで、スクリュ回転トルクを低減する目的でスクリュ
圧縮比ＣＲを小さくする場合、従来は供給部１４の溝深
さｈf と計量部１６の溝深さｈmの格差を小さくする方
法がとられてきたが、上述したように供給部１４での成
形材料の移送量が不安定となり、計量時間がばらつきや
すくなったり、脱気が不十分となったり、計量部１６で
の成形材料の混練性が不足し、未溶融成形材料や色むら
が発生しやすい。By the way, the screw compression ratio CR of the screw 11 having the above structure is expressed by the following equation. CR = h f (D-h f) · l f / h m (D-h m) · l m ... (1) D: screw diameter h f: groove depth of the supply portion 14 d f: feed section 14 groove diameter l f: lead length of the supply unit 14 h m: groove depth d m of the weighing unit 16: groove diameter l m of the weighing unit 16: where the lead length of the metering section 16, to reduce the screw torque when reducing the screw compression ratio CR purpose, conventionally, a method of reducing the disparity in the groove depth h m of the weighing unit 16 and the groove depth h f of the supply unit 14 have been taken, supplied as described above The transfer amount of the molding material in the section 14 becomes unstable, the measuring time tends to vary, the degassing becomes insufficient, the kneading property of the molding material in the measuring section 16 becomes insufficient, and the unmelted molding material or Color unevenness is likely to occur.
【００１９】そこで、上述したような問題点を引き起こ
さずにスクリュ圧縮比ＣＲを小さくしてスクリュ回転ト
ルクを低減するために、供給部１４のリード長さｌf を
小さくするか、計量部１６のリード長さｌm を大きくし
てある。すなわち、 ｌf ／Ｄ＝０．８〜１．０ … （２） として、通常より小さく設定するか、 ｌm ／Ｄ＝１．０〜１．３ … （３） として、通常より大きく設定する。[0019] Therefore, in order to reduce the screw torque by reducing the screw compression ratio CR without causing problems as described above, or to reduce the lead length l f of the supply unit 14, the metering section 16 The lead length l m is increased. That, l f /D=0.8~1.0 ... as (2), or the normal set smaller than, a l m /D=1.0~1.3 ... (3), usually set larger than .
【００２０】この場合、ｌf ／Ｄの値とｌm ／Ｄの値の
間及びｌf ／Ｄの値と可塑化能力の間には所定の関係が
あり、上記ｌf ／Ｄの値及びｌm ／Ｄの値はその関係を
満足し、上記式（２），（３）の範囲に収まるように設
定される。図３は供給部及び計量部のリード長さの関係
図、図４は供給部のリード長さと可塑化能力の関係図で
ある。[0020] In this case, between the values and plasticizing capacity between and l f / D of the values of l f / D and l m / D has a predetermined relationship, the value of the l f / D and The value of lm / D satisfies the relationship and is set to fall within the range of the above equations (2) and (3). FIG. 3 is a diagram showing the relationship between the lead length of the supply unit and the measuring unit, and FIG. 4 is a diagram showing the relationship between the lead length of the supply unit and the plasticizing ability.
【００２１】図３に示すように、ｌf ／Ｄの値とｌm ／
Ｄの値は比例関係にあり、また、図４に示すように、可
塑化能力すなわちスクリュ１１が成形材料を溶融しなが
ら前方に単位時間に送る移送量（ｋｇ／ｈ）とｌf ／Ｄ
の値においてはｌf ／Ｄの値が増加するのに伴い可塑化
能力は増大する傾向にある。したがって、スクリュ回転
トルクを低減しながら可塑化能力を大きくする場合に
は、ｌm ／Ｄの値を大きく設定し、スクリュ回転トルク
を低減しながら混練性を向上させる場合には、ｌf ／Ｄ
の値を小さく設定するとよい。As shown in FIG. 3, the value of l f / D and l m /
The value of D is in a proportional relationship, and as shown in FIG. 4, the plasticizing ability, that is, the transfer amount (kg / h) that the screw 11 sends forward in a unit time while melting the molding material, and l f / D
, The plasticizing ability tends to increase as the value of l f / D increases. Therefore, when increasing the plasticizing ability while reducing the screw rotation torque, the value of l m / D is set to a large value, and when improving the kneading property while reducing the screw rotation torque, l f / D
Should be set small.
【００２２】そして、圧縮部１５において、リード長さ
の値を上記供給部１４のリード長さｌf から計量部１６
のリード長さｌm へ滑らかに変化させるようにしてい
る。なお、本発明は上記実施例に限定されるものではな
く、本発明の趣旨に基づいて種々変形することが可能で
あり、それらを本発明の範囲から排除するものではな
い。[0022] Then, in the compression unit 15, the read length measuring unit 16 from l f of the supply unit 14 to the value of the read length
Of the lead length 1 m . It should be noted that the present invention is not limited to the above-described embodiment, but can be variously modified based on the gist of the present invention, and they are not excluded from the scope of the present invention.
【００２３】[0023]
【発明の効果】以上、詳細に説明したように、本発明に
よれば、加熱シリンダ内を回転自在かつ前後進自在に配
設されるスクリュの長さ方向の全体にフライトが形成さ
れており、後端から先端にかけて供給部、圧縮部及び計
量部を形成している。そして、該計量部の溝径を供給部
の溝径より大きくし、該供給部から圧縮部に移動した成
形材料が圧縮部において圧縮され、加熱されて容積を減
少する。As described above in detail, according to the present invention, a flight is formed in the entire lengthwise direction of a screw which is rotatably and forwardly and backwardly movable in a heating cylinder. A supply section, a compression section, and a measurement section are formed from the rear end to the front end. Then, the groove diameter of the measuring section is made larger than the groove diameter of the supply section, and the molding material moved from the supply section to the compression section is compressed in the compression section, heated and reduced in volume.
【００２４】ここで、上記供給部のリード長さとスクリ
ュ径の比を ０．８〜１．０ の範囲として、上記計量部のリード長さとスクリュ径の
比より小さく設定するか、上記計量部のリード長さとス
クリュ径の比を １．０〜１．３ の範囲として、上記供給部のリード長さとスクリュ径の
比より大きく設定する。Here, the ratio of the lead length of the supply section to the screw diameter is set in the range of 0.8 to 1.0, and is set to be smaller than the ratio of the lead length of the measuring section to the screw diameter, or The ratio between the lead length and the screw diameter is set to be in the range of 1.0 to 1.3, and is set to be larger than the ratio between the lead length and the screw diameter of the supply section.
【００２５】したがって、供給部に比較して計量部のリ
ード長さが長くなるので、可塑化時における容積の減少
が少ない成形材料や、溶融した状態における粘性が高い
成形材料を使用する場合においても、比較的円滑に計量
部に移動させることができ、可塑化時のスクリュ回転ト
ルクを低減し、成形材料の流れを円滑にし、かつ、十分
に脱気を行うことができるとともに、未溶融成形材料や
色むらの発生を防止することができる。Therefore, since the lead length of the measuring section is longer than that of the supply section, even when a molding material having a small decrease in volume during plasticization or a molding material having a high viscosity in a molten state is used. , Can be relatively smoothly moved to the measuring section, reduces the screw rotation torque during plasticization, smoothes the flow of the molding material, and can sufficiently perform degassing, and can also perform unmelted molding material And the occurrence of uneven color can be prevented.
【図１】本発明の射出成形機のスクリュの概略図であ
る。FIG. 1 is a schematic view of a screw of an injection molding machine according to the present invention.
【図２】従来の射出成形機の射出装置の断面図である。FIG. 2 is a sectional view of an injection device of a conventional injection molding machine.
【図３】供給部及び計量部のリード長さの関係図であ
る。FIG. 3 is a diagram illustrating a relationship between lead lengths of a supply unit and a measuring unit.
【図４】供給部のリード長さと可塑化能力の関係図であ
る。FIG. 4 is a diagram illustrating a relationship between a lead length of a supply unit and a plasticizing ability.
１１ スクリュ １２ フライト １３ 溝 １４ 供給部 １５ 圧縮部 １６ 計量部 DESCRIPTION OF SYMBOLS 11 Screw 12 Flight 13 Groove 14 Supply part 15 Compression part 16 Measuring part
───────────────────────────────────────────────────── フロントページの続き (58)調査した分野(Int.Cl.6，ＤＢ名) B29C 45/46 - 45/50 B29C 45/58 - 45/60──────────────────────────────────────────────────続 き Continued on the front page (58) Field surveyed (Int.Cl. 6 , DB name) B29C 45/46-45/50 B29C 45/58-45/60
Claims (2)
出成形機のスクリュにおいて、 （ａ）後端から先端にかけて供給部、圧縮部及び計量部
を形成し、 （ｂ）該計量部の溝径を供給部の溝径より大きくし、 （ｃ）該供給部のリード長さとスクリュ径の比を ０．８〜１．０ の範囲として、上記計量部のリード長さとスクリュ径の
比より小さく設定したことを特徴とする射出成形機のス
クリュ。1. A screw of an injection molding machine in which a flight is formed in the entire length direction, (a) a supply section, a compression section, and a measurement section are formed from a rear end to a front end, and (b) a groove of the measurement section. (C) The ratio of the lead length of the supply section to the screw diameter is in the range of 0.8 to 1.0, and is smaller than the ratio of the lead length of the measuring section to the screw diameter. A screw for an injection molding machine characterized by the setting.
出成形機のスクリュにおいて、 （ａ）後端から先端にかけて供給部、圧縮部及び計量部
を形成し、 （ｂ）該計量部の溝径を供給部の溝径より大きくし、 （ｃ）上記計量部のリード長さとスクリュ径の比を １．０〜１．３ の範囲として、上記供給部のリード長さとスクリュ径の
比より大きく設定したことを特徴とする射出成形機のス
クリュ。2. A screw of an injection molding machine in which a flight is formed in the entire length direction. (A) A supply section, a compression section, and a measurement section are formed from a rear end to a front end, and (b) a groove of the measurement section. (C) The ratio of the lead length of the measuring section to the screw diameter is in the range of 1.0 to 1.3, and is larger than the ratio of the lead length of the supplying section to the screw diameter. A screw for an injection molding machine characterized by the setting.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP18759691A JP2813254B2 (en) | 1991-07-26 | 1991-07-26 | Injection molding machine screw |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP18759691A JP2813254B2 (en) | 1991-07-26 | 1991-07-26 | Injection molding machine screw |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH0531775A JPH0531775A (en) | 1993-02-09 |
| JP2813254B2 true JP2813254B2 (en) | 1998-10-22 |
Family
ID=16208879
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP18759691A Expired - Lifetime JP2813254B2 (en) | 1991-07-26 | 1991-07-26 | Injection molding machine screw |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2813254B2 (en) |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP3755293B2 (en) * | 1997-05-22 | 2006-03-15 | 日立金属株式会社 | Screw for plasticizing apparatus of fiber reinforced thermoplastic resin and plasticizing apparatus |
| US8057726B2 (en) | 2008-06-19 | 2011-11-15 | Grupo Petrotemex, S.A. De C.V. | Screw designs having improved performance with low melting PET resins |
| CN104827636A (en) * | 2015-04-24 | 2015-08-12 | 芜湖米斯机械科技有限公司 | Water draining type material canister for exhaust injection molding machine |
-
1991
- 1991-07-26 JP JP18759691A patent/JP2813254B2/en not_active Expired - Lifetime
Also Published As
| Publication number | Publication date |
|---|---|
| JPH0531775A (en) | 1993-02-09 |
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