JPH0661796B2 - Resin temperature detector for injection molding machine - Google Patents
Resin temperature detector for injection molding machineInfo
- Publication number
- JPH0661796B2 JPH0661796B2 JP61228019A JP22801986A JPH0661796B2 JP H0661796 B2 JPH0661796 B2 JP H0661796B2 JP 61228019 A JP61228019 A JP 61228019A JP 22801986 A JP22801986 A JP 22801986A JP H0661796 B2 JPH0661796 B2 JP H0661796B2
- Authority
- JP
- Japan
- Prior art keywords
- molten resin
- resin
- injection molding
- molding machine
- temperature
- 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
【発明の詳細な説明】 〔産業上の利用分野〕 本発明は射出成形機の樹脂温度検出装置に関する。The present invention relates to a resin temperature detecting device for an injection molding machine.
従来，この種の樹脂温度検出装置としては、次の３つの
ものが知られている。Conventionally, the following three types of resin temperature detecting devices of this type are known.
加熱シリンダ内のスクリュ先端から加熱シリンダの先
端に設けられたノズルに至る溶融樹脂の流路にトーピー
ドを設置し，このトーピードの先端に熱電対等の温度セ
ンサを設けたもの。A torpedo is installed in the molten resin flow path from the screw tip in the heating cylinder to the nozzle provided at the tip of the heating cylinder, and a temperature sensor such as a thermocouple is installed at the tip of this torpedo.
ノズル内に温度センサを溶融樹脂の流路へ突出させて
設けたもの。A temperature sensor is provided inside the nozzle so that it projects into the flow path of the molten resin.
加熱シリンダやノズル等にファイバスコープの先端を
差込んで，このファイバスコープの先端に溶融樹脂から
発生する輻射熱（赤外線）を検知する赤外線センサを設
けたもの。An infrared sensor that inserts the tip of a fiberscope into a heating cylinder or nozzle, and that detects the radiant heat (infrared) generated from molten resin at the tip of this fiberscope.
しかしながら，上述した従来の樹脂温度検出装置は，そ
れぞれ次のような欠点を有する。However, the above-mentioned conventional resin temperature detecting devices have the following drawbacks.
先ず，のものでは，トーピード自体の熱容量が大きい
為，実質的には溶融樹脂の温度ではなくトーピードの表
面温度を測定しているにすぎない。又，トーピードは溶
融樹脂の滞留部を作り，その部分の溶融樹脂は，ヤケ，
黄変等の発生により劣化し易い。従って，成形品の外観
不良や強度の低下を招いたりして好ましくない。First, since the heat capacity of the torpedo itself is large, the surface temperature of the torpedo is not actually measured but the temperature of the molten resin. In addition, the torpedo creates a stagnation part for the molten resin, and the molten resin in that part is discolored,
It easily deteriorates due to yellowing. Therefore, the appearance of the molded product is deteriorated and the strength is lowered, which is not preferable.
又，のものでは，温度センサを溶融樹脂の流路へ突出
して設けているので，ノズル内壁等の周辺部の温度の影
響を受け，正確な樹脂の温度を検出することが困難であ
る。Further, in the case of the above, since the temperature sensor is provided so as to project into the flow path of the molten resin, it is difficult to accurately detect the temperature of the resin due to the influence of the temperature of the peripheral portion such as the inner wall of the nozzle.
更に，のものでは，樹脂の種類や着色に応じて輻射率
が変わり，調整を必要とする。又，赤外線センサに向き
あった壁の温度の影響を受ける。更に，赤外線センサを
埋め込むため，大径の長いノズルを採用する必要があ
る。又，通常の温度センサを用いたものと比較し，価格
が１０〜２０倍と高価になる。In addition, the emissivity of the resin changes depending on the type and color of the resin and requires adjustment. Also, it is affected by the temperature of the wall facing the infrared sensor. Furthermore, since the infrared sensor is embedded, it is necessary to use a long nozzle with a large diameter. In addition, the price is 10 to 20 times more expensive than that using an ordinary temperature sensor.
本発明の目的は，溶融樹脂に悪影響を及ぼすことなく，
正確に溶融樹脂の温度を測定できる，安価で構造が簡単
な樹脂温度検出装置を提供することにある。The object of the present invention is to prevent the molten resin from being adversely affected.
An object of the present invention is to provide an inexpensive and simple resin temperature detecting device that can accurately measure the temperature of molten resin.
本発明による射出成形機の樹脂温度検出装置は，加熱シ
リンダ内の溶融樹脂をスクリュによって加熱シリンダの
先端に設けられたノズルから金型内に射出する射出成形
機における溶融樹脂の温度を検出する装置であって，ス
クリュ先端からノズルに至る溶融樹脂の流路と直角に，
この流路を横切る小径の管を設置し，この小径管内に流
路のほぼ中心に位置するように温度センサを設けている
ことを特徴とする。A resin temperature detecting device for an injection molding machine according to the present invention is a device for detecting the temperature of a molten resin in an injection molding machine in which molten resin in a heating cylinder is injected by a screw into a mold from a nozzle provided at the tip of the heating cylinder. And at a right angle to the molten resin flow path from the screw tip to the nozzle,
A feature is that a small-diameter pipe is installed across the flow passage, and a temperature sensor is provided in the small-diameter pipe so as to be located at the approximate center of the flow passage.
以下，本発明の実施例について図面を参照して詳細に説
明する。Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings.
第１図を参照すると，射出成形機の加熱シリンダ１０の
先端に先端部にノズル穴１２′を有するノズル本体１２
が取付けられている。そして加熱シリンダ１０内の溶融
樹脂は，スクリュ１４によって，可塑化−混練されると
共にノズル本体１２内の中央部を貫通する流路１６を介
し，図示しない金型内に射出される。なお，スクリュ１
４の先端部にはスクリュヘッド１８が設けられ，スクリ
ュヘッド１８の外周には逆流防止リング２０が設けられ
ている。本実施例では，樹脂温度検出装置がノズル本体
１２に埋設されている。Referring to FIG. 1, a nozzle body 12 having a nozzle hole 12 'at the tip of a heating cylinder 10 of an injection molding machine.
Is installed. Then, the molten resin in the heating cylinder 10 is plasticized and kneaded by the screw 14, and is injected into a mold (not shown) through the flow path 16 penetrating the central portion of the nozzle body 12. In addition, screw 1
A screw head 18 is provided at the tip of the screw 4, and a backflow prevention ring 20 is provided on the outer periphery of the screw head 18. In this embodiment, the resin temperature detecting device is embedded in the nozzle body 12.
第２図をも参照して，本実施例の樹脂温度検出装置は，
温度センササポートブッシュ２２を有している。この温
度センササポートブッシュ２２は，略円筒形で，ノズル
本体１２の流路１６に対し直角方向に貫通した円筒形の
開口部内に埋設されている。また，温度センササポート
ブッシュ２２には，ノズル本体１２内の流路１６と対応
した位置に，流路１６と同径の流路１６′が穴加工され
ている。本実施例の温度センササポートブッシュ２２の
外径Ｄ１は１２mm〜１５mmであり，流路１６及び１６′
の径Ｄ２は約８mmである。前記ブッシュ２２の中心軸に
は，径Ｄ３が1.0mm〜1.6mmの細孔が貫通しており、この
細孔内に外径が細孔の径と実質的に等しいシース（管）
２４が挿入されている。このシース２４はブッシュ２２
の細孔に銀ロー付けされており，シース２４の先端は，
ブッシュ２２の細孔の口のところまで達している。シー
ス２４内には熱電対２６が挿入され，該熱電対の接点２
６′は上記流路１６′のほぼ中心に位置している。な
お，２８は，ブッシュ２２をノズル本体１２に固定する
ためのセットボルトである。なお，本実施例のブッシュ
２２は，その上端及び下端の形状がノズル本体１２の外
径と同じになるような曲面をしている。従って，ブッシ
ュ２２をノズル本体１２に埋設し固定したとき，ノズル
本体１２の外周面に凹凸が生じない。Referring also to FIG. 2, the resin temperature detecting device of the present embodiment is
It has a temperature sensor support bush 22. The temperature sensor support bush 22 has a substantially cylindrical shape and is embedded in a cylindrical opening that penetrates the nozzle body 12 in a direction perpendicular to the flow passage 16. Further, the temperature sensor support bush 22 is provided with a flow passage 16 ′ having the same diameter as the flow passage 16 at a position corresponding to the flow passage 16 in the nozzle body 12. Outer diameter D 1 of the temperature sensor support bush 22 of the present embodiment is 12Mm～15mm, passage 16 and 16 '
The diameter D 2 is about 8 mm. A pore having a diameter D 3 of 1.0 mm to 1.6 mm penetrates through the central axis of the bush 22, and a sheath (tube) having an outer diameter substantially equal to the diameter of the pore in the pore.
24 is inserted. This sheath 24 is a bush 22
Silver brazing is applied to the pores of the
It reaches the mouth of the pores of the bush 22. A thermocouple 26 is inserted in the sheath 24, and contacts 2 of the thermocouple 2 are inserted.
6'is located substantially at the center of the flow path 16 '. Incidentally, 28 is a set bolt for fixing the bush 22 to the nozzle body 12. The bush 22 of this embodiment has a curved surface whose upper and lower ends have the same outer diameter as the nozzle body 12. Therefore, when the bush 22 is embedded and fixed in the nozzle body 12, no unevenness is formed on the outer peripheral surface of the nozzle body 12.
又，本実施例では，ノズル本体１２の外周面にバンドヒ
ータ３０が取付けられている。このバンドヒータ３０に
は，シース２４を外部へ取出すための穴が開けられてい
る。Further, in this embodiment, the band heater 30 is attached to the outer peripheral surface of the nozzle body 12. The band heater 30 has a hole for taking out the sheath 24 to the outside.
なお，上記実施例では樹脂温度検出装置がノズル本体１
２の中央部付近に設けられているが，スクリュ１４の先
端からノズル穴１２′の間であればどこでも良い。特
に，本実施例のブッシュ２２の外径は小さいので，樹脂
温度検出装置をノズル本体１２の先端付近に組み込むこ
ともできる。In the above embodiment, the resin temperature detecting device is the nozzle body 1
Although it is provided in the vicinity of the central portion of No. 2, it may be provided anywhere between the tip of the screw 14 and the nozzle hole 12 '. In particular, since the outer diameter of the bush 22 of this embodiment is small, the resin temperature detecting device can be incorporated near the tip of the nozzle body 12.
シース２４の外径は流路１６及び１６′の径に比べて非
常に小さいので，流路１６及び１６′内を流れる溶融樹
脂の流れを妨げることもなく，溶融樹脂の圧力損失は無
視できるほど小さい。又，流路１６及び１６′内を流れ
る溶融樹脂がシース２４に当たる面積（衝突断面積）も
狭いので，溶融樹脂よりシース２４に働く力も小さい。Since the outer diameter of the sheath 24 is much smaller than the diameters of the channels 16 and 16 ', it does not hinder the flow of the molten resin flowing in the channels 16 and 16', and the pressure loss of the molten resin is negligible. small. Further, since the area where the molten resin flowing in the flow paths 16 and 16 'contacts the sheath 24 (collision cross-sectional area) is small, the force acting on the sheath 24 is smaller than that of the molten resin.
又，シース２４の流路１６′の部分は，その両端をブッ
シュ２２によって支持されているので，撓みが少ない。
更にブッシュ２２は，ノズル本体１２をその軸方向と直
角に貫通し，流路１６及び１６′の中心軸に対し対称に
配置されてい。従って，ブッシュ２２は流路１６及び１
６′内を流れる溶融樹脂の圧力を均等に受けるので，ブ
ッシュ２２の固定は，図示の如くセットボルト３０や単
純なカシメ程度で良い。Further, since both ends of the flow path 16 'of the sheath 24 are supported by the bushes 22, the bending is small.
Further, the bush 22 penetrates the nozzle body 12 at right angles to its axial direction and is arranged symmetrically with respect to the central axes of the flow paths 16 and 16 '. Therefore, the bush 22 is formed by the channels 16 and 1
Since the pressure of the molten resin flowing through 6'is evenly received, the bush 22 may be fixed by a set bolt 30 or a simple caulking as shown in the drawing.
本発明では，温度センサ（熱電対の接点２６′）は，流
路１６′のほぼ中心位置に設けられているので，例えば
流路１６及び１６′の外壁等の周辺部の温度の影響をほ
とんど受けるとことなく，正確な溶融樹脂の温度を測定
できる。In the present invention, since the temperature sensor (the thermocouple contact 26 ') is provided at the substantially central position of the flow passage 16', the influence of the temperature of the peripheral portions such as the outer walls of the flow passages 16 and 16 'is almost eliminated. The temperature of the molten resin can be measured accurately without receiving it.
以上の説明で明らかな如く，本発明によれば，溶融樹脂
の流路と直角にこの流路を横切る小径の管（シース）を
設置し，この管内に流路のほぼ中心に位置するように温
度センサ（熱電対の接点）を設けているので，溶融樹脂
の温度を正確に測定できると共に，構造が簡単で安価な
射出成形機の樹脂温度検出装置を提供できる。従って，
本発明の樹脂温度検出装置を使用することにより，射出
成形中の樹脂温度を検出して成形状況をモニタすること
ができる。更に，１ショット分の樹脂温度の変化もモニ
タできるので，スクリュストロークに応じた樹脂温度分
布のバラツキを小さくするように，最適可塑化プログラ
ムを設定することも可能である。As is apparent from the above description, according to the present invention, a small-diameter pipe (sheath) that crosses the flow path of the molten resin at right angles to the flow path of the molten resin is installed, and the pipe is positioned substantially at the center of the flow path. Since the temperature sensor (the contact point of the thermocouple) is provided, the temperature of the molten resin can be accurately measured, and the resin temperature detecting device of the injection molding machine having a simple structure and inexpensive can be provided. Therefore,
By using the resin temperature detecting device of the present invention, the resin temperature during injection molding can be detected to monitor the molding condition. Further, since the change in the resin temperature for one shot can be monitored, it is possible to set the optimum plasticizing program so as to reduce the variation in the resin temperature distribution according to the screw stroke.
第１図は本発明の一実施例による射出成形機の樹脂温度
検出装置の構成を示す第２図Ｉ−Ｉ′の断面図，第２図
は第１図II−II′の断面図である。 １０……加熱シリンダ，１２……ノズル本体，１２′…
…ノズル穴，１４……スクリュ，２２……温度センササ
ポートブッシュ，２４……シース（管），２６……熱電
対，２６′……熱電対の接点（温度センサ）。FIG. 1 is a sectional view of I-I 'of FIG. 2 showing the construction of a resin temperature detecting device of an injection molding machine according to an embodiment of the present invention, and FIG. 2 is a sectional view of II-II' of FIG. . 10 ... Heating cylinder, 12 ... Nozzle body, 12 '...
... Nozzle hole, 14 ... Screw, 22 ... Temperature sensor support bush, 24 ... Sheath (tube), 26 ... Thermocouple, 26 '... Thermocouple contact (temperature sensor).
Claims (1)
って加熱シリンダの先端に設けられたノズルから金型内
に射出する射出成形機における溶融樹脂の温度を検出す
る装置において，前記スクリュ先端からノズルに至る溶
融樹脂の流路と直角に，該流路を横切る小径の管を設置
し，該小径管内に流路のほぼ中心に位置するように温度
センサを設けてなる射出成形機の樹脂温度検出装置。1. An apparatus for detecting the temperature of molten resin in an injection molding machine, wherein a molten resin in a heating cylinder is injected into a mold from a nozzle provided at the tip of the heating cylinder by a screw. A resin temperature detection device for an injection molding machine, in which a small-diameter pipe that crosses the flow path of the molten resin that reaches the flow path is installed, and a temperature sensor is provided in the small-diameter pipe so as to be located approximately at the center of the flow path. .
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP61228019A JPH0661796B2 (en) | 1986-09-29 | 1986-09-29 | Resin temperature detector for injection molding machine |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP61228019A JPH0661796B2 (en) | 1986-09-29 | 1986-09-29 | Resin temperature detector for injection molding machine |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS6382726A JPS6382726A (en) | 1988-04-13 |
| JPH0661796B2 true JPH0661796B2 (en) | 1994-08-17 |
Family
ID=16869917
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP61228019A Expired - Lifetime JPH0661796B2 (en) | 1986-09-29 | 1986-09-29 | Resin temperature detector for injection molding machine |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0661796B2 (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2009233892A (en) * | 2008-03-26 | 2009-10-15 | Sekisui Chem Co Ltd | Resin temperature detecting device and injection molding machine |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2669706B2 (en) * | 1990-03-01 | 1997-10-29 | 株式会社名機製作所 | Injection molding machine |
| GB201112530D0 (en) * | 2011-07-21 | 2011-08-31 | Res Ltd | Injection moulding nozzle |
| CN109968607A (en) * | 2019-03-28 | 2019-07-05 | 英格斯模具制造（中国）有限公司 | Fluid inspection type nozzle |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS6271621A (en) * | 1985-09-26 | 1987-04-02 | Tokai Rubber Ind Ltd | Temperature detector in path of material to be extruded |
-
1986
- 1986-09-29 JP JP61228019A patent/JPH0661796B2/en not_active Expired - Lifetime
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS6271621A (en) * | 1985-09-26 | 1987-04-02 | Tokai Rubber Ind Ltd | Temperature detector in path of material to be extruded |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2009233892A (en) * | 2008-03-26 | 2009-10-15 | Sekisui Chem Co Ltd | Resin temperature detecting device and injection molding machine |
Also Published As
| Publication number | Publication date |
|---|---|
| JPS6382726A (en) | 1988-04-13 |
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