JP6711997B1 - Manufacturing method of mold temperature sensor - Google Patents

Manufacturing method of mold temperature sensor Download PDF

Info

Publication number
JP6711997B1
JP6711997B1 JP2019083985A JP2019083985A JP6711997B1 JP 6711997 B1 JP6711997 B1 JP 6711997B1 JP 2019083985 A JP2019083985 A JP 2019083985A JP 2019083985 A JP2019083985 A JP 2019083985A JP 6711997 B1 JP6711997 B1 JP 6711997B1
Authority
JP
Japan
Prior art keywords
sheath
fixed body
reinforcing member
hole
temperature sensor
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.)
Active
Application number
JP2019083985A
Other languages
Japanese (ja)
Other versions
JP2020180863A (en
Inventor
晃 黒河
晃 黒河
Original Assignee
株式会社八洲測器
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by 株式会社八洲測器 filed Critical 株式会社八洲測器
Priority to JP2019083985A priority Critical patent/JP6711997B1/en
Application granted granted Critical
Publication of JP6711997B1 publication Critical patent/JP6711997B1/en
Publication of JP2020180863A publication Critical patent/JP2020180863A/en
Active legal-status Critical Current
Anticipated expiration legal-status Critical

Links

Images

Landscapes

  • Measuring Temperature Or Quantity Of Heat (AREA)
  • Moulds For Moulding Plastics Or The Like (AREA)

Abstract

【課題】従来に比してコストを削減することが可能であって、また形成される温度センサの小型化を図ることができる金型用温度センサの製造方法を提供する。【解決手段】本発明の金型用温度センサの製造方法は、金属シース６の内部に熱電対素線７、８及び絶縁材９を備えるシース型熱電対２を準備する工程と、シース型熱電対２が挿入される貫通孔１３を有するとともに金型１００の保持孔１０５の内周面に適合する外周面を備える固定体３を準備する工程と、シース型熱電対２を貫通孔１３に挿通した後、シース型熱電対２を固定体３に固着させる工程と、を有する。【選択図】図１PROBLEM TO BE SOLVED: To provide a method of manufacturing a temperature sensor for a mold, which can reduce the cost as compared with a conventional one, and can reduce the size of a formed temperature sensor. A method for manufacturing a mold temperature sensor according to the present invention includes a step of preparing a sheath thermocouple 2 including thermocouple wires 7 and 8 and an insulating material 9 inside a metal sheath 6, and a sheath thermoelectric element. A step of preparing a fixed body 3 having a through hole 13 into which the pair 2 is inserted and having an outer peripheral surface matching the inner peripheral surface of the holding hole 105 of the mold 100; and inserting the sheath type thermocouple 2 into the through hole 13. After that, the step of fixing the sheath type thermocouple 2 to the fixed body 3 is performed. [Selection diagram] Figure 1

Description

本発明は、金型に取り付けて使用される金型用温度センサの製造方法に関するものである。 The present invention relates to a method for manufacturing a temperature sensor for a mold, which is used by being attached to a mold.

従来、様々な製造分野において温度センサが使用されている。温度センサで測定された温度は、製造時に不具合が生じていないか監視したり、製造時における各種制御を行ったりする際に利用されている。 Conventionally, temperature sensors have been used in various manufacturing fields. The temperature measured by the temperature sensor is used for monitoring whether or not a defect has occurred during manufacturing and for performing various controls during manufacturing.

例えば、溶融した樹脂が射出されるキャビティ（空洞）が内部に形成され、キャビティ内で溶融樹脂を冷却硬化させて所定の形状とする射出成形用金型においては、一対の素線からなる熱電対によって構成され、金型に取り付けて温度を測定する金型用温度センサが使用されている。このような金型用温度センサによれば、金型の温度や金型内の樹脂の温度を測定することが可能である。 For example, in an injection molding die in which a cavity into which molten resin is injected is formed, and the molten resin is cooled and hardened in the cavity to have a predetermined shape, a thermocouple consisting of a pair of wires is used. A temperature sensor for a mold is used, which is configured by, and is attached to the mold to measure the temperature. With such a mold temperature sensor, it is possible to measure the temperature of the mold and the temperature of the resin in the mold.

金型用温度センサとして特許文献１には、支持筒の先端部に二つの長孔を形成し、それぞれの孔に熱電対を構成する各素線を挿入して、支持筒の先端部で各素線を溶接したものが示されている。 In Patent Document 1 as a mold temperature sensor, two elongated holes are formed at the tip of a support cylinder, and each wire constituting a thermocouple is inserted into each of the holes, and each of the holes is formed at the tip of the support cylinder. Welded wires are shown.

また特許文献２には、固定筒体に一つの挿入孔を形成するとともに挿入孔の先端部に傾斜面を形成し、一対の素線を挿入孔に挿入するとともに傾斜面で各素線を溶接した金型用温度センサが示されている。 Further, in Patent Document 2, one insertion hole is formed in a fixed cylindrical body and an inclined surface is formed at a tip end portion of the insertion hole, a pair of strands are inserted into the insertion hole, and each strand is welded on the sloped surface. A die temperature sensor is shown.

特許第４１７７３３３号公報Japanese Patent No. 4177333 特許第５５０３７１７号公報Japanese Patent No. 5503717

ところで特許文献１の金型用温度センサは、支持筒の先端部に二つの孔を設けなければならず、またそれぞれの孔に各素線を挿入しなければならないため、加工工数や組み立て工数の増大を招いている。また、工数の増大に伴ってコストも嵩むこととなる。更に、各素線の絶縁材としてチューブを使用しているため、温度センサの小型化を図るにはチューブの細径化を進めなければならない。加えてこの温度センサは、各素線と接続される補償導線も支持筒に挿入されるところ、補償導線は大径であるため、温度センサの小型化を進めるうえで障害となっている。 By the way, in the temperature sensor for a mold of Patent Document 1, two holes must be provided at the tip of the support cylinder, and each wire must be inserted into each hole. Causing an increase. Further, the cost increases as the number of steps increases. Furthermore, since a tube is used as an insulating material for each wire, it is necessary to reduce the diameter of the tube in order to downsize the temperature sensor. In addition, in this temperature sensor, the compensating lead wire connected to each element wire is also inserted into the support tube. However, the compensating lead wire has a large diameter, which is an obstacle to the miniaturization of the temperature sensor.

また特許文献２の金型用温度センサでは、固定筒体に形成する挿入孔は一つで済むものの、この挿入孔は、固定筒体の基端側と先端側で内径を変えているため、下降に手間を要することになる。また挿入孔の先端部には傾斜面を形成しなければならないため、コスト増大につながっている。更に、熱電対を構成する素線は２本に分かれているため、これらを揃えた状態で挿入孔に挿通させなければならず、組み立て性に難があるうえ、組み立てに要する時間も増えることになる。 Further, in the mold temperature sensor of Patent Document 2, although only one insertion hole is required to be formed in the fixed cylindrical body, this insertion hole has different inner diameters on the proximal end side and the distal end side of the fixed cylindrical body. It will take time to descend. In addition, since the inclined surface must be formed at the tip of the insertion hole, the cost is increased. Furthermore, since the wires that make up the thermocouple are divided into two wires, it is necessary to insert them in the insertion hole in an aligned state, which makes assembly difficult and increases the time required for assembly. Become.

このような従来の問題に鑑み、本発明の金型用温度センサの製造方法では、従来に比してコストを削減することが可能であって、また形成される温度センサの小型化を図ることを課題とする。 In view of such conventional problems, in the method for manufacturing a mold temperature sensor of the present invention, it is possible to reduce the cost as compared with the conventional method, and to reduce the size of the formed temperature sensor. Is an issue.

本発明は、金型に設けた保持孔に取り付けられる金型用温度センサの製造方法であって、金属シースの内部に熱電対素線及び絶縁材を備えるシース型熱電対を準備する工程と、前記シース型熱電対が挿入される貫通孔及び該貫通孔に直列状につながるとともに該貫通孔よりも内周面が大径になる補強部材保持孔を有するとともに前記保持孔の内周面に適合する外周面を備える固定体を準備する工程と、前記補強部材保持孔に挿入することが可能な外径で、且つ前記シース型熱電対を挿入させることが可能な内径となる筒状の補強部材を準備する工程と、前記補強部材を挿通させた前記シース型熱電対を前記貫通孔に挿通した後、該シース型熱電対を前記固定体に固着させ、且つ該補強部材を該補強部材保持孔に挿入するとともに該補強部材を該固定体に固着させる工程と、を有する。 The present invention is a method for manufacturing a temperature sensor for a mold, which is attached to a holding hole provided in a mold, wherein a step of preparing a sheath type thermocouple including a thermocouple wire and an insulating material inside a metal sheath, It has a through hole into which the sheath type thermocouple is inserted and a reinforcing member holding hole which is connected in series to the through hole and has an inner peripheral surface larger in diameter than the through hole, and which is adapted to the inner peripheral surface of the holding hole. And a tubular reinforcing member having an outer diameter that can be inserted into the reinforcing member holding hole and an inner diameter that allows the sheath-type thermocouple to be inserted. And a step of inserting the sheath type thermocouple into which the reinforcing member has been inserted into the through hole , and then fixing the sheath type thermocouple to the fixed body , and the reinforcing member into the reinforcing member holding hole. And fixing the reinforcing member to the fixed body .

また本発明は、金型に設けた保持孔に取り付けられる金型用温度センサの製造方法であって、金属シースの内部に熱電対素線及び絶縁材を備え、一端部で該熱電対素線が露出したシース材を準備する工程と、前記シース材が挿入される貫通孔及び該貫通孔に直列状につながるとともに該貫通孔よりも内周面が大径になる補強部材保持孔を有するとともに前記保持孔の内周面に適合する外周面を備える固定体を準備する工程と、前記補強部材保持孔に挿入することが可能な外径で、且つ前記シース材を挿入させることが可能な内径となる筒状の補強部材を準備する工程と、前記補強部材を挿通させた前記シース材を前記貫通孔に挿通した後、溶接材を用いて前記一端部を前記固定体に溶接し、且つ該補強部材を該補強部材保持孔に挿入するとともに該補強部材を該固定体に固着させる工程と、を有するものでもある。 The present invention is also a method of manufacturing a mold temperature sensor attached to a holding hole provided in a mold, comprising a thermocouple wire and an insulating material inside a metal sheath, the thermocouple wire being provided at one end. A step of preparing a sheath material in which the sheath material is exposed, and a through hole into which the sheath material is inserted, and a reinforcing member holding hole connected to the through hole in series and having an inner peripheral surface larger in diameter than the through hole A step of preparing a fixed body having an outer peripheral surface conforming to the inner peripheral surface of the holding hole; and an inner diameter capable of being inserted into the reinforcing member holding hole and capable of inserting the sheath material. And a step of preparing a tubular reinforcing member, and after inserting the sheath material through which the reinforcing member is inserted into the through hole, weld the one end to the fixed body using a welding material , and A step of inserting a reinforcing member into the reinforcing member holding hole and fixing the reinforcing member to the fixed body .

ここで、溶接後の前記溶接材の先端面と前記固定体の先端面とが同一平面となるように研磨される工程、を更に有することが好ましい。 Here, it is preferable to further include a step of polishing so that the front end surface of the welding material and the front end surface of the fixed body after welding are flush with each other.

本発明における金型用温度センサの製造方法によれば、金属シースの内部に熱電対素線及び絶縁材を備えるシース材で形成されるシース型熱電対を使用する、又はシース材そのものを準備して、固定体との組み立てを行う際にこれを熱電対として機能させているため、従来のように各素線の絶縁材となるチューブや各素線と接続される補償導線が不要になり、温度センサの小型化を図ることができる。また固定体に設ける貫通孔は一つで済むうえ、従来の温度センサのように貫通孔の先端部に傾斜面を設ける必要もない。加えて、従来の温度センサでは２本の素線を揃えた状態で挿入孔に通す必要があったが、本発明の熱電対素線は金属シースに取り囲まれていて一体的に取り扱えるため、組み立てに要する時間も減らすことができる。よって加工工数や組み立て工数が抑えられ、コスト削減を図ることができる。 According to the method for manufacturing a mold temperature sensor of the present invention, a sheath type thermocouple formed of a sheath material having a thermocouple element wire and an insulating material inside a metal sheath is used, or the sheath material itself is prepared. As it is made to function as a thermocouple when assembling with the fixed body, it becomes unnecessary to use a tube that becomes an insulating material of each element wire or a compensating lead wire connected to each element wire as in the past. It is possible to reduce the size of the temperature sensor. Further, only one through hole is provided in the fixed body, and it is not necessary to provide an inclined surface at the tip of the through hole unlike the conventional temperature sensor. In addition, in the conventional temperature sensor, it was necessary to pass the two wires in the insertion hole while aligning them, but since the thermocouple wire of the present invention is surrounded by the metal sheath and can be handled integrally, it is assembled. The time required for can be reduced. Therefore, the processing man-hours and the assembly man-hours can be suppressed, and the cost can be reduced.

本発明に従う金型用温度センサの一実施形態を示した図である。It is a figure showing one embodiment of a temperature sensor for molds according to the present invention. 図１に示す金型用温度センサを構成する部材を示す、（ａ）はシース型熱電対の平面図と断面図であり、（ｂ）は固定体の平面図と断面図である。The member which comprises the temperature sensor for metal molds shown in FIG. 1 is shown, (a) is a top view and sectional drawing of a sheath type thermocouple, (b) is a top view and sectional drawing of a fixed body. 図１の金型用温度センサを金型に取り付けた状態で模式的に示した断面図である。It is sectional drawing which showed typically the state which attached the temperature sensor for metal molds of FIG. 1 to the metal mold|die.

以下、添付した図面を参照しながら本発明に従う金型用温度センサの製造方法に関し、その一実施形態を説明する。 An embodiment of a method for manufacturing a temperature sensor for a mold according to the present invention will be described below with reference to the accompanying drawings.

まず、本実施形態の製造方法で形成される金型用温度センサ１について説明する。図１に示すように金型用温度センサ１は、シース型熱電対２と固定体３と補強部材４と、コネクタ５とを備えるものである。 First, the mold temperature sensor 1 formed by the manufacturing method of the present embodiment will be described. As shown in FIG. 1, the mold temperature sensor 1 includes a sheath thermocouple 2, a fixed body 3, a reinforcing member 4, and a connector 5.

シース型熱電対２は、図２（ａ）に示すように、円筒状に形成された金属シース６の内部に、熱電対を構成する二本の熱電対素線７、８と絶縁材９を備えるシース材１０を使用して熱電対としたものである。 As shown in FIG. 2( a ), the sheath type thermocouple 2 has a cylindrical metal sheath 6 in which two thermocouple wires 7 and 8 and an insulating material 9 constituting a thermocouple are arranged. The sheath material 10 provided is used as a thermocouple.

シース材１０は、金属シース６の母材である金属パイプの内部に熱電対素線７、８となる二種類の金属線母材を収納し、更に金属パイプと金属線母材との間に絶縁材９を充填した後、金属パイプとともに金属線母材を延伸させることによって形成される。なお、金属シース６と二本の熱電対素線７、８は互いに離隔した位置にあり、これらの間に絶縁材９が介在して相互に絶縁した状態となっている。金属シース６としては、例えばステンレスの使用が一般的であるが、銅やチタン等、他の金属を使用してもよい。また熱電対素線７、８は、使用温度範囲や特性に応じて様々な素材が使用できるが、例えば一方はアルメル、他方はクロメルの組み合わせで使用される。また絶縁材９としては、酸化マグネシウムの他、酸化アルミニウムや酸化ケイ素が使用される。 The sheath material 10 accommodates two types of metal wire base materials, which are the thermocouple wires 7 and 8, inside a metal pipe that is the base material of the metal sheath 6, and further between the metal pipe and the metal wire base material. It is formed by filling the insulating material 9 and then stretching the metal wire base material together with the metal pipe. The metal sheath 6 and the two thermocouple wires 7 and 8 are separated from each other, and an insulating material 9 is interposed between them to be insulated from each other. As the metal sheath 6, for example, stainless steel is generally used, but other metals such as copper and titanium may be used. Further, various materials can be used for the thermocouple wires 7 and 8 depending on the operating temperature range and characteristics. For example, one is used as a combination of alumel and the other is used as a combination of chromel. As the insulating material 9, aluminum oxide or silicon oxide is used in addition to magnesium oxide.

そして、シース材１０の一端部で熱電対素線７、８を電気的に接続することによって、シース型熱電対２として機能させる。図２（ａ）に示すように本実施形態においては、一端部において熱電対素線７、８の端面が露出したシース材１０を準備し、シース材１０の一端部が溶接材で覆われるようにして溶接を行い、これにより熱電対素線７、８を電気的に接続してシース型熱電対２として機能させている。なお本実施形態においては、仮想線で示すように余盛りが形成されるように溶接を行ったのち、溶接した部位が平坦になるように研磨を行ってシース型熱電対２を形成している。シース材１０をシース型熱電対２として機能させるにあたっては、例えば金属シース６の一端部における絶縁材９を除去して熱電対素線７、８の先端部をやや長めに露出させ、次いでこれらの先端部同士を溶接等で接合した後、再び絶縁材９を金属シース６に充填して接合部を絶縁状態とし、更に必要に応じて金属シース６の一端部を溶接等によって封止する等、他の方法を採用してもよい。なおシース型熱電対２は、後述するように金型内に射出された溶融した樹脂の温度を計測するのに最適な仕様で形成されている。 Then, the thermocouple wires 7 and 8 are electrically connected at one end of the sheath material 10 to function as the sheath thermocouple 2. As shown in FIG. 2A, in the present embodiment, a sheath material 10 in which the end surfaces of the thermocouple wires 7 and 8 are exposed at one end is prepared, and one end of the sheath material 10 is covered with a welding material. Are welded, and thereby the thermocouple wires 7 and 8 are electrically connected to function as the sheath type thermocouple 2. In the present embodiment, the sheath thermocouple 2 is formed by performing welding so that a surplus is formed as shown by an imaginary line and then polishing so that the welded portion becomes flat. .. When the sheath material 10 is made to function as the sheath type thermocouple 2, for example, the insulating material 9 at one end of the metal sheath 6 is removed to expose the tips of the thermocouple wires 7 and 8 a little longer, and then these After joining the tip portions to each other by welding or the like, the metal sheath 6 is filled with the insulating material 9 again to bring the joined portion into an insulating state, and if necessary, one end portion of the metal sheath 6 is sealed by welding or the like. Other methods may be adopted. The sheath type thermocouple 2 is formed with the optimum specifications for measuring the temperature of the molten resin injected into the mold as described later.

固定体３は、図２（ｂ）に示すように全体として段付き円筒状に形成されるものであって、金型用温度センサ１として仕上げた際にその先端側に位置する固定体先端部１１と、固定体先端部１１に直列状に連結するとともに固定体先端部１１よりも外周面が大径になる固定体基端部１２とを備えている。また固定体先端部１１と固定体基端部１２の内部には、固定体先端部１１から固定体基端部１２の中間部まで延在する貫通孔１３と、貫通孔１３に直列状につながるとともに貫通孔１３よりも内周面が大径になる補強部材保持孔１４とが設けられている。固定体先端部１１は、後述するように金型に設けた保持孔に挿入される部位であって、固定体先端部１１の外周面は、保持孔の内周面に対して隙間なく収まるように、高い寸法精度で仕上げられている。 The fixed body 3 is formed in a stepped cylindrical shape as a whole as shown in FIG. 2(b), and is located on the tip side of the fixed body 3 when it is finished as the mold temperature sensor 1. 11 and a fixed body base end portion 12 which is connected to the fixed body front end portion 11 in series and whose outer peripheral surface has a larger diameter than the fixed body front end portion 11. Further, inside the fixed body tip portion 11 and the fixed body base end portion 12, a through hole 13 extending from the fixed body tip portion 11 to an intermediate portion of the fixed body base portion 12 and a through hole 13 are connected in series. At the same time, a reinforcing member holding hole 14 whose inner peripheral surface has a diameter larger than that of the through hole 13 is provided. The fixed body tip portion 11 is a portion to be inserted into a holding hole provided in the mold as described later, and the outer peripheral surface of the fixed body tip portion 11 is fit into the inner peripheral surface of the holding hole without a gap. It is finished with high dimensional accuracy.

補強部材４は、本実施形態では円筒状をなしていて、ステンレス等の金属で形成されるものである。補強部材４は、補強部材保持孔１４に挿入することが可能な外径で、且つシース型熱電対２を挿入させることが可能な内径で形成されている。 The reinforcing member 4 has a cylindrical shape in the present embodiment, and is made of metal such as stainless steel. The reinforcing member 4 is formed to have an outer diameter that can be inserted into the reinforcing member holding hole 14 and an inner diameter that allows the sheath thermocouple 2 to be inserted.

コネクタ５は、シース型熱電対２の他端部に取り付けられ、不図示の熱電対用温度計にシース型熱電対２を接続するために使用される。コネクタ５を熱電対用温度計に接続することによって、シース型熱電対２で生じる起電力に基づいて温度を計測することができる。 The connector 5 is attached to the other end of the sheath thermocouple 2 and is used for connecting the sheath thermocouple 2 to a thermocouple thermometer (not shown). By connecting the connector 5 to the thermocouple thermometer, the temperature can be measured based on the electromotive force generated in the sheath thermocouple 2.

次に、本実施形態における金型用温度センサ１の製造方法について説明する。まず、上述したシース型熱電対２と固定体３とを準備する。 Next, a method of manufacturing the mold temperature sensor 1 according to this embodiment will be described. First, the sheath thermocouple 2 and the fixed body 3 described above are prepared.

次いで、固定体３の貫通孔１３にシース型熱電対２を挿入する。なお本実施形態においては、予めシース型熱電対２の先端側から補強部材４を挿入させておき、その後、シース型熱電対２を貫通孔１３に挿入する。シース型熱電対２は金属シース６を使用していて比較的コシがあるため、貫通孔１３にスムーズに挿入することができる。また、シース型熱電対２に使用されている熱電対素線７、８は金属シース６に取り囲まれているため、これらを一体的に取り扱うことができ、各素線を揃えた状態にして孔に通さなければならなかった従来の温度センサに比して、容易に組み立てることができる。なお、貫通孔１３に挿入したシース型熱電対２の先端部は、固定体先端部１１の先端部よりも内側に位置するようにしておく。 Then, the sheath thermocouple 2 is inserted into the through hole 13 of the fixed body 3. In this embodiment, the reinforcing member 4 is inserted from the tip side of the sheath thermocouple 2 in advance, and then the sheath thermocouple 2 is inserted into the through hole 13. Since the sheath type thermocouple 2 uses the metal sheath 6 and is relatively elastic, it can be smoothly inserted into the through hole 13. Further, since the thermocouple wires 7 and 8 used in the sheath-type thermocouple 2 are surrounded by the metal sheath 6, they can be handled integrally, and the wires are arranged in the aligned state. It is easier to assemble than the conventional temperature sensor that had to be passed through. The tip of the sheath type thermocouple 2 inserted into the through hole 13 is located inside the tip of the fixed body tip 11.

その後は、図１に示すように溶接材１５を使用して、シース型熱電対２の先端部と固定体先端部１１とを溶接し、シース型熱電対２を固定体３に固着させる。本実施形態においては、図中に仮想線で示したように、固定体先端部１１から溶接材１５が盛り上がるように溶接を行い、シース型熱電対２が貫通孔１３の内側で確実に溶接されるようにしておく。 After that, as shown in FIG. 1, the welding material 15 is used to weld the tip of the sheath thermocouple 2 and the tip 11 of the fixed body to fix the sheath thermocouple 2 to the fixed body 3. In the present embodiment, as shown by the phantom line in the figure, welding is performed so that the welding material 15 rises from the fixed body tip portion 11, and the sheath thermocouple 2 is reliably welded inside the through hole 13. So that

しかる後は、主に余盛りとなった溶接材１５が取り除かれるように研磨して、研磨後の溶接材１５の先端面と固定体先端部１１の先端面が同一平面となるように仕上げる。なお、研磨後に同一平面となった溶接材１５の先端面と固定体先端部１１の先端面が、金型用温度センサ１の測定面として機能する。また研磨後の溶接材１５と固定体先端部１１の先端面は、固定体基端部１２の端面１２ａからの長さが所定の寸法に収まるように高い寸法精度で仕上げられている。 After that, polishing is performed so that the welding material 15 which becomes an excess is mainly removed, and finishing is performed so that the tip surface of the welding material 15 and the tip surface of the fixed body tip portion 11 after polishing are flush with each other. The tip surface of the welding material 15 and the tip surface of the fixed body tip portion 11 which have become flush with each other after polishing function as the measurement surface of the mold temperature sensor 1. Further, the welded material 15 and the tip end surface of the fixed body tip portion 11 after polishing are finished with high dimensional accuracy so that the length from the end surface 12a of the fixed body base end portion 12 falls within a predetermined dimension.

そして、補強部材４を補強部材保持孔１４に挿入した後、補強部材保持孔１４の開口部において溶接を行い、補強部材４を固定体３に固着させる。なお、シース型熱電対２は金属シース６を使用していて高温にも耐えうるため、上述したように金型用温度センサ１の測定面を形成した後に補強部材４と固定体３とを溶接しても、測定面に影響が及ぶことはない。 Then, after inserting the reinforcing member 4 into the reinforcing member holding hole 14, welding is performed at the opening of the reinforcing member holding hole 14 to fix the reinforcing member 4 to the fixed body 3. Since the sheath thermocouple 2 uses the metal sheath 6 and can withstand high temperatures, the reinforcing member 4 and the fixed body 3 are welded together after the measurement surface of the mold temperature sensor 1 is formed as described above. However, it does not affect the measurement surface.

このようにして製造された金型用温度センサ１は、例えば図３に示すような金型１００に取り付けて使用することができる。図示した金型１００は、キャビティ型１０１とコア型１０２を備えていて、キャビティ型１０１とコア型１０２の合わせ目にはキャビティ（空洞）１０３が設けられている。またキャビティ型１０１には、溶融した樹脂をキャビティ１０３に射出するためのゲート１０４が設けられていて、コア型１０２には、金型用温度センサ１の固定体先端部１１が挿入される保持孔１０５が設けられている。上述したように固定体先端部１１の外周面は、保持孔１０５の内周面に対して隙間なく収まるように高い寸法精度で仕上げられている。また、上述したように研磨後の溶接材１５と固定体先端部１１の先端面は、固定体基端部１２の端面１２ａからの長さが所定の寸法に収まるように高い寸法精度で仕上げられている。ここで、固定体先端部１１を保持孔１０５に挿入した際、固定体基端部１２は保持孔１０５の端面１０６に当接するようにしていて、上述した固定体先端部１１の先端面から固定体基端部１２の端面１２ａまでの所定の寸法は、端面１０６を起点とする保持孔１０５の深さ（端面１０６からキャビティ１０３までの深さ）と同一である。従って、固定体先端部１１を保持孔１０５に最後まで挿入することによって、固定体先端部１１の先端面を、キャビティ１０３の内面に揃える（同一面にする）ことができる。 The mold temperature sensor 1 manufactured in this manner can be attached to a mold 100 as shown in FIG. 3 for use. The illustrated mold 100 includes a cavity mold 101 and a core mold 102, and a cavity (cavity) 103 is provided at a joint between the cavity mold 101 and the core mold 102. Further, the cavity mold 101 is provided with a gate 104 for injecting the molten resin into the cavity 103, and the core mold 102 is a holding hole into which the fixed body tip portion 11 of the mold temperature sensor 1 is inserted. 105 is provided. As described above, the outer peripheral surface of the fixed body tip portion 11 is finished with high dimensional accuracy so as to fit into the inner peripheral surface of the holding hole 105 without a gap. As described above, the welded material 15 and the tip end surface of the fixed body tip portion 11 after polishing are finished with high dimensional accuracy so that the length from the end surface 12a of the fixed body base end portion 12 falls within a predetermined dimension. ing. Here, when the fixed body tip portion 11 is inserted into the holding hole 105, the fixed body base end portion 12 is made to contact the end surface 106 of the holding hole 105, and is fixed from the tip surface of the fixed body tip portion 11 described above. The predetermined dimension up to the end surface 12a of the body proximal end portion 12 is the same as the depth of the holding hole 105 starting from the end surface 106 (the depth from the end surface 106 to the cavity 103). Therefore, by inserting the fixed body tip portion 11 into the holding hole 105 to the end, the tip surface of the fixed body tip portion 11 can be aligned with the inner surface of the cavity 103 (same surface).

金型１００で樹脂製品を形成するに当たっては、溶融した樹脂をゲート１０４から射出してキャビティ１０３に溶融樹脂を充填する。ここで、溶融樹脂の射出量が適正量よりも多いと、キャビティ１０３の内圧が過剰に高くなり、キャビティ型１０１とコア型１０２の合わせ目から溶融樹脂が漏れて樹脂製品にバリが形成されることがある。また射出量が適正量よりも少ないと、キャビティ１０３が溶融樹脂で満たされず、ショートの不具合を引き起こすことになる。ところで上述した金型用温度センサ１は、キャビティ１０３に射出された樹脂の温度を計測することが可能である。このため、キャビティ１０３に溶融樹脂が充填されていって、金型用温度センサ１の測定面で溶融樹脂の温度が計測されると、その時点において、金型用温度センサ１で温度が計測できる程度の量が充填されていると検知できるため、溶融樹脂の射出量を適正化することができる。 In forming a resin product with the mold 100, molten resin is injected from the gate 104 to fill the cavity 103 with the molten resin. Here, if the injection amount of the molten resin is larger than the appropriate amount, the internal pressure of the cavity 103 becomes excessively high, the molten resin leaks from the joint between the cavity mold 101 and the core mold 102, and burrs are formed on the resin product. Sometimes. If the injection amount is smaller than the proper amount, the cavity 103 is not filled with the molten resin, which causes a short circuit problem. By the way, the mold temperature sensor 1 described above can measure the temperature of the resin injected into the cavity 103. Therefore, when the cavity 103 is filled with the molten resin and the temperature of the molten resin is measured on the measurement surface of the mold temperature sensor 1, the temperature can be measured by the mold temperature sensor 1 at that time. Since it is possible to detect that a certain amount is filled, it is possible to optimize the injection amount of the molten resin.

また、上述したように金型用温度センサ１の固定体先端部１１は、保持孔１０５に対して隙間なく収まっていて、また固定体先端部１１の先端面は、キャビティ１０３の内面と揃って同一面となっているため、保持孔１０５から樹脂が流出してバリが形成されることはなく、また形成される樹脂製品に保持孔１０５や金型用温度センサ１の痕が目立って残ることはない。 Further, as described above, the fixed body tip portion 11 of the mold temperature sensor 1 is fitted into the holding hole 105 without any gap, and the tip surface of the fixed body tip portion 11 is aligned with the inner surface of the cavity 103. Since they are on the same surface, the resin does not flow out from the holding hole 105 to form a burr, and the resin product to be formed has the marks of the holding hole 105 and the mold temperature sensor 1 conspicuously left. There is no.

また、固定体先端部１１は小径であって、その先端面の面積も狭いため、キャビティ１０３に充填された溶融樹脂から受ける力が小さくなり、金型用温度センサ１に加わる負荷を減らすことができる。また金型１００に設ける保持孔１０５も小さくなるため、金型１００の強度が大きく損なわれることもない。更に、このような温度センサにおいては一般に、小型化を図ることで応答性や計測精度が高まるため、金型用温度センサ１においてもこの点で利点がある。 Further, since the fixed body tip portion 11 has a small diameter and the area of the tip surface is small, the force received from the molten resin filled in the cavity 103 becomes small and the load applied to the mold temperature sensor 1 can be reduced. it can. Further, since the holding hole 105 provided in the mold 100 is also small, the strength of the mold 100 is not significantly impaired. Further, in such a temperature sensor, in general, responsiveness and measurement accuracy are improved by downsizing, so that the mold temperature sensor 1 also has an advantage in this respect.

なお、従来の温度センサを金型から取り外す場合、一般には特別な工具を要していたが、金型用温度センサ１は、固定体３に固着させた補強部材４を備えているため、補強部材４掴んで金型１００から引き抜くことができる。 In addition, when removing the conventional temperature sensor from the mold, a special tool is generally required, but since the mold temperature sensor 1 includes the reinforcing member 4 fixed to the fixed body 3, it is reinforced. The member 4 can be grasped and pulled out from the mold 100.

上述した実施形態では、シース材１０からシース型熱電対２を形成しておき、それを固定体３に取り付けるようにしたが、シース材１０のままで固定体３に取り付けるようにしても金型用温度センサ１を製造することができる。 In the above-described embodiment, the sheath thermocouple 2 is formed from the sheath material 10 and is attached to the fixed body 3. However, even if the sheath material 10 is attached to the fixed body 3 as it is, a mold is used. The temperature sensor 1 for use can be manufactured.

シース材１０のまま固定体３に取り付ける製造方法においては、一端部において熱電対素線７、８の端面が露出したシース材１０を準備しておく。また固定体３は、上述したものを準備しておく。更に、上述した実施形態と同様に、シース材１０の一端部から補強部材４を挿入しておく。 In the manufacturing method of attaching the sheath material 10 to the fixed body 3 as it is, the sheath material 10 in which the end faces of the thermocouple wires 7 and 8 are exposed at one end is prepared. The fixed body 3 is prepared as described above. Furthermore, as in the above-described embodiment, the reinforcing member 4 is inserted from one end of the sheath material 10.

そして、固定体３の貫通孔１３に、熱電対素線７、８の端面が露出したシース材１０を挿入する。なお、貫通孔１３に挿入したシース材１０の先端部は、固定体先端部１１の先端部よりも内部に位置するようにしておく。 Then, the sheath material 10 in which the end faces of the thermocouple wires 7 and 8 are exposed is inserted into the through hole 13 of the fixed body 3. The distal end portion of the sheath material 10 inserted into the through hole 13 is located inside the distal end portion of the fixed body distal end portion 11.

その後は、上述した実施形態と同様に溶接材１５を使用して、シース材１０の先端部と固定体先端部１１とを溶接し、シース材１０を固定体３に固着させる。このとき、溶接材１５によって熱電対素線７、８が電気的に接続されるため、シース材１０を熱電対として機能させることができる。なお溶接材１５で溶接を行う場合は、上述した実施形態と同様に固定体先端部１１から溶接材１５が盛り上がるように溶接を行い、その後、溶接材１５の先端面と固定体先端部１１の先端面が同一平面となるように研磨することが好ましい。 After that, the welding material 15 is used as in the above-described embodiment to weld the distal end portion of the sheath material 10 and the fixed body distal end portion 11 to fix the sheath material 10 to the fixed body 3. At this time, since the thermocouple wires 7 and 8 are electrically connected by the welding material 15, the sheath material 10 can function as a thermocouple. When welding is performed with the welding material 15, the welding is performed so that the welding material 15 rises from the fixed body tip portion 11 as in the above-described embodiment, and then the tip surface of the welding material 15 and the fixed body tip portion 11 are separated. It is preferable to polish the tip surfaces so that they are flush with each other.

このように、シース材１０を固定体３に取り付ける製造方法では、予めシース材１０からシース型熱電対２を形成する工程が不要になるため、組み立て工数が減るうえ、組み立てに要する時間も減らすことができ、コストをより削減することが可能となる。 As described above, in the manufacturing method of attaching the sheath material 10 to the fixed body 3, the step of forming the sheath type thermocouple 2 from the sheath material 10 in advance is unnecessary, so that the number of assembling steps is reduced and the time required for assembling is also reduced. Therefore, the cost can be further reduced.

以上、本発明に従う金型用温度センサの製造方法について具体的な実施形態を示しながら説明したが、本発明は上述した実施形態に限られるものではなく、特許請求の範囲に従う範疇で種々の変更を加えたものも含まれる。例えば補強部材４を挿入する補強部材保持孔１４を廃止して、固定体３の基端側に直接溶接してもよい。また補強部材４の形状は円筒状に限られず、例えば横断面形状がＣ字状になるものでもよい。また補強部材４を固定体に固着する手段は溶接に限られず、例えばカシメなど他の手段を採用してもよい。なお、補強部材４は必ずしも設けなくてもよい。 The method for manufacturing the mold temperature sensor according to the present invention has been described above with reference to specific embodiments, but the present invention is not limited to the above-described embodiments, and various modifications are made within the scope of the claims. It also includes those with. For example, the reinforcing member holding hole 14 into which the reinforcing member 4 is inserted may be eliminated, and welding may be performed directly on the base end side of the fixed body 3. Further, the shape of the reinforcing member 4 is not limited to the cylindrical shape, and may have, for example, a C-shaped cross section. The means for fixing the reinforcing member 4 to the fixed body is not limited to welding, and other means such as caulking may be adopted. The reinforcing member 4 does not necessarily have to be provided.

１：金型用温度センサ
２：シース型熱電対
３：固定体
４：補強部材
５：コネクタ
６：金属シース
７：熱電対素線
８：熱電対素線
９：絶縁材
１０：シース材
１１：固定体先端部
１２：固定体基端部
１２ａ：固定体基端部の端面
１３：貫通孔
１４：補強部材保持孔
１５：溶接材
１００：金型
１０１：キャビティ型
１０２：コア型
１０３：キャビティ
１０４：ゲート
１０５：保持孔
１０６：端面 1: Temperature sensor for mold 2: Sheath type thermocouple 3: Fixed body 4: Reinforcing member 5: Connector 6: Metal sheath 7: Thermocouple wire 8: Thermocouple wire 9: Insulating material 10: Sheath material 11: Fixed body tip part 12: Fixed body base end part 12a: End face of fixed body base end part 13: Through hole 14: Reinforcing member holding hole 15: Welding material 100: Mold 101: Cavity mold 102: Core mold 103: Cavity 104 : Gate 105: Holding hole 106: End face

Claims (3)

金型に設けた保持孔に取り付けられる金型用温度センサの製造方法であって、
金属シースの内部に熱電対素線及び絶縁材を備えるシース型熱電対を準備する工程と、
前記シース型熱電対が挿入される貫通孔及び該貫通孔に直列状につながるとともに該貫通孔よりも内周面が大径になる補強部材保持孔を有するとともに前記保持孔の内周面に適合する外周面を備える固定体を準備する工程と、
前記補強部材保持孔に挿入することが可能な外径で、且つ前記シース型熱電対を挿入させることが可能な内径となる筒状の補強部材を準備する工程と、
前記補強部材を挿通させた前記シース型熱電対を前記貫通孔に挿通した後、該シース型熱電対を前記固定体に固着させ、且つ該補強部材を該補強部材保持孔に挿入するとともに該補強部材を該固定体に固着させる工程と、を有する金型用温度センサの製造方法。 A method for manufacturing a mold temperature sensor attached to a holding hole provided in a mold, comprising:
A step of preparing a sheath type thermocouple including a thermocouple wire and an insulating material inside the metal sheath;
It has a through hole into which the sheath type thermocouple is inserted and a reinforcing member holding hole which is connected in series to the through hole and has an inner peripheral surface larger in diameter than the through hole, and which is adapted to the inner peripheral surface of the holding hole. A step of preparing a fixed body having an outer peripheral surface to
A step of preparing a tubular reinforcing member having an outer diameter that can be inserted into the reinforcing member holding hole and an inner diameter that allows the sheath type thermocouple to be inserted;
After inserting the sheath type thermocouple into which the reinforcing member is inserted into the through hole, the sheath type thermocouple is fixed to the fixed body , and the reinforcing member is inserted into the reinforcing member holding hole and the reinforcement is performed. And a step of fixing a member to the fixed body . 金型に設けた保持孔に取り付けられる金型用温度センサの製造方法であって、
金属シースの内部に熱電対素線及び絶縁材を備え、一端部で該熱電対素線が露出したシース材を準備する工程と、
前記シース材が挿入される貫通孔及び該貫通孔に直列状につながるとともに該貫通孔よりも内周面が大径になる補強部材保持孔を有するとともに前記保持孔の内周面に適合する外周面を備える固定体を準備する工程と、
前記補強部材保持孔に挿入することが可能な外径で、且つ前記シース材を挿入させることが可能な内径となる筒状の補強部材を準備する工程と、
前記補強部材を挿通させた前記シース材を前記貫通孔に挿通した後、溶接材を用いて前記一端部を前記固定体に溶接し、且つ該補強部材を該補強部材保持孔に挿入するとともに該補強部材を該固定体に固着させる工程と、を有する金型用温度センサの製造方法。 A method for manufacturing a mold temperature sensor attached to a holding hole provided in a mold, comprising:
A step of preparing a sheath material having a thermocouple wire and an insulating material inside the metal sheath and exposing the thermocouple wire at one end;
A through hole into which the sheath material is inserted, and a reinforcing member holding hole which is connected to the through hole in series and has an inner peripheral surface having a larger diameter than the through hole, and which has an outer circumference adapted to the inner peripheral surface of the holding hole. Preparing a fixed body having a surface,
Preparing a tubular reinforcing member having an outer diameter that can be inserted into the reinforcing member holding hole and an inner diameter that allows the sheath material to be inserted;
After inserting the sheath material through which the reinforcing member is inserted into the through hole, weld the one end to the fixed body using a welding material , and insert the reinforcing member into the reinforcing member holding hole. And a step of fixing a reinforcing member to the fixed body . 溶接後の前記溶接材の先端面と前記固定体の先端面とが同一平面となるように研磨される工程、を更に有する請求項２に記載の金型用温度センサの製造方法。 The method for manufacturing a mold temperature sensor according to claim 2, further comprising a step of polishing so that a front end surface of the welding material after welding and a front end surface of the fixed body are flush with each other.
JP2019083985A 2019-04-25 2019-04-25 Manufacturing method of mold temperature sensor Active JP6711997B1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP2019083985A JP6711997B1 (en) 2019-04-25 2019-04-25 Manufacturing method of mold temperature sensor

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP2019083985A JP6711997B1 (en) 2019-04-25 2019-04-25 Manufacturing method of mold temperature sensor

Publications (2)

Publication Number Publication Date
JP6711997B1 true JP6711997B1 (en) 2020-06-17
JP2020180863A JP2020180863A (en) 2020-11-05

Family

ID=71079400

Family Applications (1)

Application Number Title Priority Date Filing Date
JP2019083985A Active JP6711997B1 (en) 2019-04-25 2019-04-25 Manufacturing method of mold temperature sensor

Country Status (1)

Country Link
JP (1) JP6711997B1 (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN115027070A (en) * 2022-06-07 2022-09-09 北京金诺美科技股份有限公司 Auxiliary device for manufacturing temperature calibration probe and manufacturing process

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP7424763B2 (en) * 2019-06-26 2024-01-30 ミネベアミツミ株式会社 Temperature sensors and temperature measurement systems

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN115027070A (en) * 2022-06-07 2022-09-09 北京金诺美科技股份有限公司 Auxiliary device for manufacturing temperature calibration probe and manufacturing process

Also Published As

Publication number Publication date
JP2020180863A (en) 2020-11-05

Similar Documents

Publication Publication Date Title
JP6711997B1 (en) Manufacturing method of mold temperature sensor
WO2017221464A1 (en) Temperature detection device
US20030146819A1 (en) Sensor and manufacturing method thereof
JP5503717B1 (en) Temperature detector, temperature sensor, and method of manufacturing temperature detector
JP5045454B2 (en) Thermocouple mounting structure to tube wall and thermocouple mounting method
KR20090117658A (en) Temperature sensor
US4277886A (en) Method for manufacturing an encapsulated probe on sheathed thermocouples
CN102265128A (en) Temperature sensor, manufacturing process and corresponding method of assembly
US9370887B2 (en) Sensing device for detecting a physical quantity and method for producing said sensor
JP5302183B2 (en) Glow plug and manufacturing method thereof
JP3124998B2 (en) Thermocouple device for tube wall temperature measurement and method of manufacturing the same
JP2006029967A (en) Sensor and its manufacturing method
JPH078739U (en) Temperature sensor
JP2010161041A (en) Manufacturing method of terminal fitting integrated resin connector
JP6075398B2 (en) Temperature sensor and method of manufacturing temperature sensor
JP4843430B2 (en) Glow plug manufacturing method
JP4059222B2 (en) Temperature sensor and method of manufacturing temperature sensor
EP3992597A1 (en) Temperature sensor and temperature measurement system
JP5776886B2 (en) Mold deformation measurement system
JP2013149807A (en) Temperature sensor and manufacturing method of the same
CN217935257U (en) Clamp for positioning temperature detection element
JPS59202038A (en) Manufacture of temperature sensor
JP4807201B2 (en) Sheath thermocouple and manufacturing method thereof
US20240032424A1 (en) Method for manufacturing measuring device and measuring device
JP5576350B2 (en) Temperature sensor

Legal Events

Date Code Title Description
A621 Written request for application examination

Free format text: JAPANESE INTERMEDIATE CODE: A621

Effective date: 20200207

A871 Explanation of circumstances concerning accelerated examination

Free format text: JAPANESE INTERMEDIATE CODE: A871

Effective date: 20200207

A975 Report on accelerated examination

Free format text: JAPANESE INTERMEDIATE CODE: A971005

Effective date: 20200220

A131 Notification of reasons for refusal

Free format text: JAPANESE INTERMEDIATE CODE: A131

Effective date: 20200303

A521 Request for written amendment filed

Free format text: JAPANESE INTERMEDIATE CODE: A523

Effective date: 20200325

TRDD Decision of grant or rejection written
A01 Written decision to grant a patent or to grant a registration (utility model)

Free format text: JAPANESE INTERMEDIATE CODE: A01

Effective date: 20200407

A61 First payment of annual fees (during grant procedure)

Free format text: JAPANESE INTERMEDIATE CODE: A61

Effective date: 20200413

R150 Certificate of patent or registration of utility model

Ref document number: 6711997

Country of ref document: JP

Free format text: JAPANESE INTERMEDIATE CODE: R150

S531 Written request for registration of change of domicile

Free format text: JAPANESE INTERMEDIATE CODE: R313532

R350 Written notification of registration of transfer

Free format text: JAPANESE INTERMEDIATE CODE: R350

R250 Receipt of annual fees

Free format text: JAPANESE INTERMEDIATE CODE: R250

R250 Receipt of annual fees

Free format text: JAPANESE INTERMEDIATE CODE: R250