JP2001088169A - Temperature measuring device of inner surface of runner of hot nozzle - Google Patents
Temperature measuring device of inner surface of runner of hot nozzleInfo
- Publication number
- JP2001088169A JP2001088169A JP27065499A JP27065499A JP2001088169A JP 2001088169 A JP2001088169 A JP 2001088169A JP 27065499 A JP27065499 A JP 27065499A JP 27065499 A JP27065499 A JP 27065499A JP 2001088169 A JP2001088169 A JP 2001088169A
- Authority
- JP
- Japan
- Prior art keywords
- hot nozzle
- temperature
- runner
- resin
- measuring device
- 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.)
- Pending
Links
- 239000000463 material Substances 0.000 claims abstract description 10
- 239000011347 resin Substances 0.000 claims description 61
- 229920005989 resin Polymers 0.000 claims description 61
- 238000005259 measurement Methods 0.000 claims description 9
- 238000001746 injection moulding Methods 0.000 claims description 6
- 238000010438 heat treatment Methods 0.000 description 18
- 230000002093 peripheral effect Effects 0.000 description 18
- 238000000465 moulding Methods 0.000 description 8
- 238000009529 body temperature measurement Methods 0.000 description 4
- 238000003780 insertion Methods 0.000 description 3
- 230000037431 insertion Effects 0.000 description 3
- 230000020169 heat generation Effects 0.000 description 2
- 230000008018 melting Effects 0.000 description 2
- 238000002844 melting Methods 0.000 description 2
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 1
- BQCADISMDOOEFD-UHFFFAOYSA-N Silver Chemical compound [Ag] BQCADISMDOOEFD-UHFFFAOYSA-N 0.000 description 1
- 229910052799 carbon Inorganic materials 0.000 description 1
- 238000001816 cooling Methods 0.000 description 1
- 238000002309 gasification Methods 0.000 description 1
- 239000012943 hotmelt Substances 0.000 description 1
- 230000001771 impaired effect Effects 0.000 description 1
- WABPQHHGFIMREM-UHFFFAOYSA-N lead(0) Chemical compound [Pb] WABPQHHGFIMREM-UHFFFAOYSA-N 0.000 description 1
- 229910052709 silver Inorganic materials 0.000 description 1
- 239000004332 silver Substances 0.000 description 1
- 230000008023 solidification Effects 0.000 description 1
- 238000007711 solidification Methods 0.000 description 1
- 229910001220 stainless steel Inorganic materials 0.000 description 1
- 239000010935 stainless steel Substances 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
- B29C45/26—Moulds
- B29C45/27—Sprue channels ; Runner channels or runner nozzles
- B29C45/2737—Heating or cooling means therefor
-
- 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
- B29C45/26—Moulds
- B29C45/27—Sprue channels ; Runner channels or runner nozzles
- B29C45/2737—Heating or cooling means therefor
- B29C2045/274—Thermocouples or heat sensors
Abstract
Description
【０００１】[0001]
【発明の属する技術分野】本発明は、樹脂射出成形装置
に設けられているホットノズルのランナー内面温度を測
定することができる温度測定器であって、特にホットノ
ズルのランナー内面の各要所位置の温度を精度よく測定
することができる構成となしたホットノズルのランナー
内面温度測定器に関するものである。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a temperature measuring device capable of measuring the inner surface temperature of a runner of a hot nozzle provided in a resin injection molding apparatus. The present invention relates to a hot nozzle runner inner surface temperature measuring device having a configuration capable of accurately measuring the temperature of the hot nozzle.
【０００２】[0002]
【従来の技術】樹脂成形品を射出成形するために使用さ
れる樹脂射出成形装置には、成形金型と、その金型内へ
加熱溶融樹脂を射出せしめるためのホットノズルを有し
ており、さらにそのホットノズルの外周面には、該ホッ
トノズルの内部つまりランナーを経て成形金型内へ圧送
される加熱溶融樹脂の冷却固化を防ぐためのホットノズ
ル加熱ヒータが配置されている。2. Description of the Related Art A resin injection molding apparatus used for injection molding of a resin molded product has a molding die and a hot nozzle for injecting a heat-melted resin into the die. Further, on the outer peripheral surface of the hot nozzle, there is arranged a hot nozzle heater for preventing the cooling and solidification of the heated molten resin which is pressure-fed into the molding die through the inside of the hot nozzle, that is, through the runner.
【０００３】即ち加熱溶融機によって、所定の流動性が
生じるように加熱溶融された溶融樹脂をホットノズルの
ランナーを経て成形金型内へ射出させるとき、その溶融
樹脂はホットノズル自体の温度に影響されて溶融樹脂の
流動性（温度）が変化し、これが原因で、樹脂の充填不
良による成形不良や、ガス焼け、銀条痕、フローマー
ク、ウエルドライン等による成形不良を生じることにな
る。例えば溶融樹脂温度が１５０℃以下になるとホット
ノズルランナー内部での流動性が損なわれ、また３００
℃以上になるとガス化が生じて成形不良が生じる。この
ようなことから、樹脂成形に使用される樹脂の材質が例
えばＡＢＳであるときは、その溶融温度は約２３０℃で
あることが望ましく、また樹脂材質がＰＰＥであるとき
は、その溶融温度は約２８０℃であることが望ましい。
ところが、それら樹脂が所定の温度で加熱溶融されて
も、その熱溶融樹脂がホットノズルのランナーを通過す
ときに、そのホットノズルのランナー内面温度に影響さ
れて、成形金型内に射出される樹脂温度が変化されてし
まうことになる。That is, when a molten resin heated and melted by a heating melter so as to have a predetermined fluidity is injected into a molding die through a runner of a hot nozzle, the molten resin affects the temperature of the hot nozzle itself. As a result, the fluidity (temperature) of the molten resin changes, which results in molding failure due to resin filling failure and molding failure due to gas burning, silver streaks, flow marks, weld lines and the like. For example, if the temperature of the molten resin becomes 150 ° C. or less, the fluidity inside the hot nozzle runner is impaired,
If the temperature exceeds ℃, gasification occurs and molding failure occurs. For this reason, when the material of the resin used for resin molding is, for example, ABS, the melting temperature is preferably about 230 ° C., and when the resin material is PPE, the melting temperature is about 230 ° C. Desirably, it is about 280 ° C.
However, even if the resin is heated and melted at a predetermined temperature, when the hot-melt resin passes through the runner of the hot nozzle, it is injected into the molding die due to the inner surface temperature of the runner of the hot nozzle. The resin temperature will be changed.
【０００４】そこでこのホットノズルのランナー内部を
通過する溶融樹脂温度が変化しないようにするための手
段として図３で示すようにホットノズル１の外周面所定
位置に複数個のリングヒータ２と温度センサ３を配設
し、その温度センサによる温度管理でホットノズル１の
全長に亘り、使用樹脂の質に応じて例えば２３０℃ある
いは２８０℃となるようにリングヒータを加熱制御して
いる。As a means for preventing the temperature of the molten resin passing through the runner of the hot nozzle from changing, a plurality of ring heaters 2 and a temperature sensor are provided at predetermined positions on the outer peripheral surface of the hot nozzle 1 as shown in FIG. The ring heater 3 is controlled by heating the ring heater over the entire length of the hot nozzle 1 to a temperature of 230 ° C. or 280 ° C., for example, according to the quality of the resin used by controlling the temperature by the temperature sensor.
【０００５】つまり上記ホットノズル１の全長が略一定
の温度となるように制御する従来の加熱制御手段は、ホ
ットノズル１の外周面に複数個のリングヒータ２と温度
センサ３を配設し、それらの温度センサ３によりホット
ノズルランナー１の外周面温度を測定し、そのホットノ
ズルの外周面温度が例えば２３０℃又は２８０℃となる
ように各リングヒータの加熱温度を個別に制御してホッ
トノズル１の全長が略一定の加熱温度となるように制御
するものであった。That is, the conventional heating control means for controlling the entire length of the hot nozzle 1 to have a substantially constant temperature is provided by disposing a plurality of ring heaters 2 and a temperature sensor 3 on the outer peripheral surface of the hot nozzle 1. The temperature sensor 3 measures the outer peripheral surface temperature of the hot nozzle runner 1 and individually controls the heating temperature of each ring heater so that the outer peripheral surface temperature of the hot nozzle becomes 230 ° C. or 280 ° C. 1 was controlled so that the heating temperature became substantially constant.
【０００６】[0006]
【発明が解決しようとする課題】ところが上記従来のホ
ットノズルランナー１の加熱制御は、そのホットノズル
１の外周面に配置している温度センサ３により、ホット
ノズル１の外周面温度を測定し、このホットノズル１の
外周面温度が上記所定温度となるように制御している。
従ってホットノズル１の外周面温度は、所定温度となる
よう制御されても、そのホットノズルの１の内周面温度
とホットノズルのランナー内部、即ち樹脂通路の壁面と
の間では温度の差が生じ、ホットノズル１の外周面の温
度を基にしてホットノズルのランナー内面温度が例えば
２３０℃、又は２８０℃の設定温度となるように温度制
御（温度管理）することは技術的困難があった。However, in the conventional heating control of the hot nozzle runner 1, the temperature of the outer peripheral surface of the hot nozzle 1 is measured by a temperature sensor 3 arranged on the outer peripheral surface of the hot nozzle 1. The temperature of the outer peripheral surface of the hot nozzle 1 is controlled to be the predetermined temperature.
Therefore, even if the outer peripheral surface temperature of the hot nozzle 1 is controlled to be a predetermined temperature, there is a difference in temperature between the inner peripheral surface temperature of the hot nozzle 1 and the inside of the hot nozzle runner, that is, the wall surface of the resin passage. It is technically difficult to perform temperature control (temperature control) such that the inner surface temperature of the runner of the hot nozzle is set to, for example, 230 ° C. or 280 ° C. based on the temperature of the outer peripheral surface of the hot nozzle 1. .
【０００７】また上記ホットノズルのランナーの全長が
６００ｍｍに及ぶ長尺形状である場合は、そのホットノ
ズルのランナー両端部の内部温度と、その中央部の内部
温度との間に温度差が生じやすく、特にそのホットノズ
ルのランナー中央部温度は高めとなり、その両端部温度
は低めとなりがちで溶融樹脂が通過されるホットノズル
のランナー内面温度を、その全長に亘って均一化させる
ことも困難であった。When the length of the runner of the hot nozzle is a long shape having a length of up to 600 mm, a temperature difference easily occurs between the internal temperature at both ends of the runner of the hot nozzle and the internal temperature at the center thereof. In particular, the temperature at the center of the runner of the hot nozzle tends to be high, and the temperature at both ends tends to be low. It is also difficult to equalize the inner surface temperature of the runner of the hot nozzle through which the molten resin passes over the entire length. Was.
【０００８】本発明はかかる従来の事実に着目してなさ
れたもので、ホットノズルの外周面に、そのホットノズ
ルの加熱温度を調整せしめるための複数の加熱ヒータを
その軸方向へ配設する加熱ヒータを取付け、その加熱ヒ
ータの発熱でホットノズルを設定温度に加熱させる加熱
テスト作業時において、それらの加熱ヒータにより加熱
されたホットノズルのランナー内面温度即ち溶融樹脂が
圧送されるランナー内面の軸方向各点の加熱温度を直接
測定することができて、そのランナーの全長に亘って、
そのランナー内壁面の加熱温度が略一定（均一）となる
ように上記複数の加熱ヒータの発熱温度を精度よく調整
するために使用できるホットノズルのランナー内面温度
測定器の提供を目的とする。The present invention has been made in view of such a conventional fact. A plurality of heaters for adjusting the heating temperature of the hot nozzle are provided on the outer peripheral surface of the hot nozzle in the axial direction thereof. At the time of a heating test operation in which a heater is attached and the hot nozzle is heated to the set temperature by the heat generated by the heater, the inner surface temperature of the runner of the hot nozzle heated by the heater, that is, the axial direction of the inner surface of the runner to which the molten resin is fed. The heating temperature at each point can be measured directly, and over the entire length of the runner,
It is an object of the present invention to provide a hot nozzle runner inner surface temperature measuring device that can be used to accurately adjust the heat generation temperatures of the plurality of heaters so that the heating temperature of the inner wall surface of the runner becomes substantially constant (uniform).
【０００９】[0009]
【課題を解決するための手段】上記目的を達成するため
に、本発明の請求項１では、樹脂射出成形装置に設けら
れるホットノズルのランナー（樹脂通路）内部に挿入し
得る外径と、そのホットノズルのランナー奥部に形成さ
れているチップ位置に到達させることがきる長さの測定
管を、耐熱性に優れかつ熱伝導率の低い材料で形成し、
該測定管の先端を二股形状となして双方の可撓弾性片を
形成し、その一方の可撓弾性片の先端に、他方の可撓弾
性片先端部に対し、上記測定管の外径面よりも外側へ離
間するように弾性付勢される弾性板を介して温度センサ
を取付け、さらに上記測定管の外面にその軸方向に沿う
目盛を施してなるホットノズルのランナー内面の温度測
定器であることを特徴としている。In order to achieve the above object, according to the first aspect of the present invention, an outer diameter which can be inserted into a runner (resin passage) of a hot nozzle provided in a resin injection molding apparatus, A measuring tube long enough to reach the tip position formed at the back of the hot nozzle runner is made of a material with excellent heat resistance and low thermal conductivity,
The distal end of the measuring tube is formed into a bifurcated shape to form both flexible elastic pieces, and the outer diameter surface of the measuring tube is provided at the distal end of one flexible elastic piece and the distal end of the other flexible elastic piece. A temperature sensor is attached via an elastic plate that is elastically biased so as to be more outwardly spaced apart from the outside, and a thermometer on the inner surface of the runner of the hot nozzle, which is further provided with a scale along the axial direction on the outer surface of the measurement tube. It is characterized by having.
【００１０】[0010]
【発明の実施の形態】以下に本発明を図面に示す実施の
形態に基いて詳細に説明する。DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, the present invention will be described in detail based on an embodiment shown in the drawings.
【００１１】図１において１１は温度測定器であって、
この温度測定器は、樹脂射出成形装置に取付け使用され
るホットノズルランナー１２のノズル内部つまり溶融軟
化樹脂を圧送する樹脂通路１３の内部に挿入し得る測定
管１４を有している。この測定管１４の外径は樹脂通路
１３の内径よりも小さくして、その樹脂通路１３内へ円
滑に挿入し得る外径に設定されている。In FIG. 1, reference numeral 11 denotes a temperature measuring device,
This temperature measuring device has a measuring tube 14 which can be inserted into a nozzle of a hot nozzle runner 12 attached to and used in a resin injection molding apparatus, that is, into a resin passage 13 for feeding a molten softened resin under pressure. The outer diameter of the measuring tube 14 is set smaller than the inner diameter of the resin passage 13 so that the measuring tube 14 can be smoothly inserted into the resin passage 13.
【００１２】この測定管１４の長さは、この測定管１４
をホットノズル１２の内部に形成されている樹脂通路１
３（ランナー）内部へ挿入したとき、その測定管１４の
先端が、樹脂通路１３の奥端に形成されているチップ部
１５に到達し得る長さに設定されている。またかかる形
状の測定管１４の材質は、ホットノズルを加熱するに要
する加熱温度例えば６００℃以上の高熱に耐え得る耐熱
性を有し、さらには熱伝導率の小さい材質で形成されて
おり、例えばカーボン製パイプ等が有効である。The length of the measuring tube 14 is
The resin passage 1 formed inside the hot nozzle 12
The length of the measuring tube 14 is set such that the tip of the measuring tube 14 can reach the tip portion 15 formed at the far end of the resin passage 13 when the measuring tube 14 is inserted into the inside of the 3 (runner). In addition, the material of the measurement tube 14 having such a shape has heat resistance enough to withstand a high temperature required for heating the hot nozzle, for example, 600 ° C. or higher, and is formed of a material having a small thermal conductivity. A carbon pipe or the like is effective.
【００１３】この測定管１４の先端部は軸方向のスリッ
ト１６により、二股形状となして一対の可撓弾性片１７
Ａ，１７Ｂを形成している。即ちスリット１６により形
成されたこれらの可撓弾性片１７Ａ，１７Ｂはその板厚
方向に可撓弾性が生起されている。そしてその一方の可
撓弾性片１７Ａの先端には、例えばステンレス板等によ
り、測定管の外方向へ湾曲形成されている弾性板１８の
一端部がねじ、リベット等による固定手段１９により固
定されており、この弾性板１８の延長端に温度センサ２
０を固定している。The distal end of the measuring tube 14 is bifurcated by an axial slit 16 to form a pair of flexible elastic pieces 17.
A, 17B are formed. That is, the flexible elastic pieces 17A and 17B formed by the slits 16 have a flexible elasticity in the thickness direction. One end of an elastic plate 18 which is curved outwardly of the measuring tube is fixed to the end of one of the flexible elastic pieces 17A by, for example, a stainless steel plate or the like by a fixing means 19 such as a screw or a rivet. The temperature sensor 2 is connected to the extension end of the elastic plate 18.
0 is fixed.
【００１４】この温度センサ２０に接続されるリード線
２１は上記測定管１４の内部を通してその測定管１４の
尾端部から支出させ、不図示である所定の温度測定制御
器に接続している。またその測定管１４の外側面には、
その測定管１４の樹脂通路１３内挿入位置を指示せしめ
るための目盛２２がその軸方向に沿って付されている。
２３は測定管１４の尾端部に取付けられているグリップ
であって、熱伝導率が低くかつ耐熱性を有する材料で形
成されていることが望ましい。The lead wire 21 connected to the temperature sensor 20 is expelled from the tail end of the measuring tube 14 through the inside of the measuring tube 14 and is connected to a predetermined temperature measuring controller (not shown). Also, on the outer surface of the measuring tube 14,
A scale 22 for indicating the insertion position of the measuring tube 14 in the resin passage 13 is provided along the axial direction.
Reference numeral 23 denotes a grip attached to the tail end of the measuring tube 14, which is desirably formed of a material having low heat conductivity and heat resistance.
【００１５】以上が温度測定器１１の構成であるが、次
にその作用について述べると、予め形成されているホッ
トノズル１２を、溶融樹脂の射出用ノズルとして使用す
るに当たり、そのホットノズルの樹脂通路１３内部を通
過する溶融樹脂が冷却固化されないようにするために、
そのホットノズル１２の外側周面に、従来例で述べたと
同様に複数個のリングヒータ２４を配置して、ホットノ
ズル１２内部に形成されている樹脂通路１３の壁面温度
が射出すべき溶融樹脂温度と略等しくなるように加熱す
る必要がある。The operation of the temperature measuring device 11 has been described above. The operation of the temperature measuring device 11 will now be described. When the hot nozzle 12 formed in advance is used as a nozzle for injecting molten resin, the resin passage of the hot nozzle is used. In order to prevent the molten resin passing through 13 from being cooled and solidified,
A plurality of ring heaters 24 are arranged on the outer peripheral surface of the hot nozzle 12 in the same manner as described in the conventional example, and the wall temperature of the resin passage 13 formed inside the hot nozzle 12 is the temperature of the molten resin to be injected. It is necessary to heat so that it is approximately equal to
【００１６】そこでそのホットノズル１２の外側周面に
配置したそれぞれのリングヒータ２４を発熱させ、この
リングヒータ２４の発熱によりホットノズル１２を加熱
するが、このホットノズル１２は長尺形状であることか
ら、そのホットノズル１２の端部、中央部等で温度分布
が異なりやすく、またホットノズル１２の外側周面と樹
脂通路の内側周面との間に温度差が生じやすい等のこと
でそのホットノズル１２における樹脂通路１３の壁面温
度が所定の温度でしかも樹脂通路１３の全長に亘って均
一温度となるように加熱することが困難である。Therefore, each of the ring heaters 24 disposed on the outer peripheral surface of the hot nozzle 12 is caused to generate heat, and the hot nozzle 12 is heated by the heat generated by the ring heater 24. The hot nozzle 12 must have a long shape. Therefore, the temperature distribution tends to be different at the end portion, the center portion, and the like of the hot nozzle 12, and a temperature difference is easily generated between the outer peripheral surface of the hot nozzle 12 and the inner peripheral surface of the resin passage. It is difficult to heat so that the wall temperature of the resin passage 13 in the nozzle 12 is a predetermined temperature and is uniform over the entire length of the resin passage 13.
【００１７】そこで上記の各リングヒータ２４を発熱さ
せてホットノズル１２を加熱させた時点で、上記温度測
定器１１の温度センサ２０を、ホットノズル１２の樹脂
通路１３内に挿入し、その樹脂通路１３の全長に亘りそ
の樹脂通路壁面要所の温度を測定する。そしてその要所
における樹脂通路壁面が所望の加熱温度（例えばＡＢＳ
樹脂使用の場合は約２３０℃となるように、またＰＰＥ
樹脂使用の場合は約２８０℃）となるようにリングヒー
タの発熱量を制御するものである。When the ring heater 24 generates heat to heat the hot nozzle 12, the temperature sensor 20 of the temperature measuring device 11 is inserted into the resin passage 13 of the hot nozzle 12, and the resin passage is inserted. The temperature of the resin passage wall is measured over the entire length of the resin passage 13. Then, the resin passage wall surface at the key point is heated to a desired heating temperature (for example, ABS
In the case of using resin, the temperature should be about 230 ° C.
The heating value of the ring heater is controlled so that the temperature becomes about 280 ° C. when a resin is used.
【００１８】このようにしてホットノズル１２の樹脂通
路１３内壁面温度を測定するために使用される温度測定
器１１は、そのホットノズル１２の樹脂通路１３内に挿
入し得る測定管１４の尖端部に、弾性板１８を介して温
度センサ２０を取付けている構成であるから、その温度
センサ２０を、樹脂通路１３壁面の所望位置に位置させ
ることができ、しかもその温度センサ２０を二股に形成
されている可撓弾性片１７Ａ，１７Ｂと弾性板１８とに
よる弾圧力で樹脂通路１３の内壁面へ確実に圧接させる
ことができるので、樹脂通路１３内壁面の所要個所の加
熱温度を測定することができる。The temperature measuring device 11 used for measuring the temperature of the inner wall surface of the resin passage 13 of the hot nozzle 12 in this manner is a sharp end of a measuring tube 14 that can be inserted into the resin passage 13 of the hot nozzle 12. In addition, since the temperature sensor 20 is attached via the elastic plate 18, the temperature sensor 20 can be located at a desired position on the wall surface of the resin passage 13, and the temperature sensor 20 is formed in two branches. The elastic pressure of the flexible elastic pieces 17A, 17B and the elastic plate 18 allows the pressure to be reliably brought into pressure contact with the inner wall surface of the resin passage 13. Therefore, it is possible to measure the heating temperature of a required portion of the inner wall surface of the resin passage 13. it can.
【００１９】また上記測定管１４の外周面軸方向には、
その測定管１４の挿入位置を表示する目盛２２が施され
ていることから、この目盛２２により樹脂通路１３内に
位置されている温度センサ２０の位置、つまり温度セン
サ２０による温度測定位置が明確となり、これによって
温度測定位置に対応するリングヒータ２４の発熱制御を
適正かつ容易に行なうことができる。In the axial direction of the outer peripheral surface of the measuring tube 14,
Since the scale 22 indicating the insertion position of the measuring tube 14 is provided, the position of the temperature sensor 20 located in the resin passage 13, that is, the temperature measurement position by the temperature sensor 20 becomes clear by the scale 22. Thus, heat generation of the ring heater 24 corresponding to the temperature measurement position can be appropriately and easily controlled.
【００２０】また上記測定管１４は熱伝導率の小さい材
質で形成されていて、その熱伝導率の小さい測定管１４
の先端部に温度センサ２０を保持させていることから、
その温度センサ２０により受けた加熱が測定管１４を伝
って外部放熱されることがなく、このために温度センサ
２０による樹脂通路１３内壁面の加熱温度を精度良く測
定することができる。The measuring tube 14 is formed of a material having a low thermal conductivity, and has a small thermal conductivity.
Since the temperature sensor 20 is held at the tip of the
The heat received by the temperature sensor 20 is not radiated to the outside through the measuring tube 14, and therefore, the heating temperature of the inner wall surface of the resin passage 13 by the temperature sensor 20 can be measured with high accuracy.
【００２１】[0021]
【発明の効果】以上の説明で明らかなように、本発明の
温度測定器によれば、ホットノズルの樹脂通路内壁面の
所要位置温度を測定することができるので、その溶融樹
脂が通過する樹脂通路内壁面の加熱温度をその溶融樹脂
温度と略等しい加熱温度となるように加熱制御すること
が容易に行なえる。また測定管の外側周面に測定管の樹
脂通路内挿入位置を表示する目盛を施しているので、樹
脂通路内部の温度測定位置を正確に把握することができ
る。また温度センサは熱伝導率の小さい材料である測定
管に支持されているので、温度センサが受けた測定熱が
放熱されることがなく、これによって精度の高い加熱温
度測定が可能となる。As is apparent from the above description, according to the temperature measuring device of the present invention, it is possible to measure the required temperature of the inner wall surface of the resin passage of the hot nozzle, so that the resin through which the molten resin passes can be measured. Heating can be easily controlled so that the heating temperature of the inner wall surface of the passage is substantially equal to the temperature of the molten resin. Also, since a scale indicating the insertion position of the measurement tube in the resin passage is provided on the outer peripheral surface of the measurement tube, the temperature measurement position in the resin passage can be accurately grasped. Further, since the temperature sensor is supported by the measurement tube made of a material having a low thermal conductivity, the measurement heat received by the temperature sensor is not dissipated, thereby enabling highly accurate heating temperature measurement.
【図１】本発明よりなる温度測定器の実施の形態を示し
た側面図。FIG. 1 is a side view showing an embodiment of a temperature measuring device according to the present invention.
【図２】本発明よりなる温度測定器の実施の形態を示し
た要部拡大図。FIG. 2 is an enlarged view of a main part showing an embodiment of a temperature measuring device according to the present invention.
【図３】従来のホットノズルランナーの外側面に、リン
グヒータと温度センサーを配置した状態の説明図。FIG. 3 is an explanatory view showing a state in which a ring heater and a temperature sensor are arranged on an outer surface of a conventional hot nozzle runner.
１１…温度測定器 １２…ホットノズル １３…樹脂通路（ランナー） １４…測定管 １５…チップ部 １６…スリット １７Ａ，１７Ｂ…可撓弾性片 １８…弾性板 １９…固定手段 ２０…温度センサ ２１…リード線 ２２…目盛 ２３…グリップ ２４…リングヒータ DESCRIPTION OF SYMBOLS 11 ... Temperature measuring device 12 ... Hot nozzle 13 ... Resin passage (runner) 14 ... Measurement tube 15 ... Tip part 16 ... Slit 17A, 17B ... Flexible elastic piece 18 ... Elastic plate 19 ... Fixing means 20 ... Temperature sensor 21 ... Lead Line 22: Scale 23: Grip 24: Ring heater
Claims (1)
ズルのランナー内部に挿入し得る外径と、そのホットノ
ズルのランナー奥部に形成されているチップ位置に到達
させることができる長さの測定管を、耐熱性に優れかつ
熱伝導率の低い材料で形成し、該測定管の先端を二股形
状となして双方の可撓弾性片を形成し、その一方の可撓
弾性片の先端に、他方の可撓弾性片先端部に対し、上記
測定管の外径面よりも外側へ離間するように弾性付勢さ
れる弾性板を介して温度センサを取付け、さらに上記測
定管の外面にその軸方向に沿う目盛を施してなることを
特徴とするホットノズルのランナー内面の温度測定器。1. A measuring tube having an outer diameter that can be inserted into a runner of a hot nozzle provided in a resin injection molding apparatus, and a length that can reach a chip position formed in the inner part of the runner of the hot nozzle. Is formed of a material having excellent heat resistance and low thermal conductivity, and the tip of the measurement tube is formed into a forked shape to form both flexible elastic pieces. A temperature sensor is attached to the distal end of the flexible elastic piece via an elastic plate which is elastically biased so as to be spaced apart from the outer diameter surface of the measurement tube. A temperature measuring device for the inner surface of a runner of a hot nozzle, which is provided with a scale according to the following.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP27065499A JP2001088169A (en) | 1999-09-24 | 1999-09-24 | Temperature measuring device of inner surface of runner of hot nozzle |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP27065499A JP2001088169A (en) | 1999-09-24 | 1999-09-24 | Temperature measuring device of inner surface of runner of hot nozzle |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JP2001088169A true JP2001088169A (en) | 2001-04-03 |
Family
ID=17489109
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP27065499A Pending JP2001088169A (en) | 1999-09-24 | 1999-09-24 | Temperature measuring device of inner surface of runner of hot nozzle |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2001088169A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6739863B2 (en) | 2001-10-12 | 2004-05-25 | George Olaru | Valve pin with thermocouple |
| US7182893B2 (en) | 2002-10-11 | 2007-02-27 | Mold-Masters Limited | Valve gated nozzle having a valve pin with a sensor |
-
1999
- 1999-09-24 JP JP27065499A patent/JP2001088169A/en active Pending
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6739863B2 (en) | 2001-10-12 | 2004-05-25 | George Olaru | Valve pin with thermocouple |
| US7410354B2 (en) | 2001-10-12 | 2008-08-12 | Mold-Masters (2007) Limited | Valve gated nozzle having a valve pin with a sensor |
| USRE40478E1 (en) | 2001-10-12 | 2008-09-02 | Mold-Masters (2007) Limited | Valve pin with thermocouple |
| US7182893B2 (en) | 2002-10-11 | 2007-02-27 | Mold-Masters Limited | Valve gated nozzle having a valve pin with a sensor |
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