JP5445729B2 - Control parts for internal combustion engines - Google Patents

Control parts for internal combustion engines Download PDF

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JP5445729B2
JP5445729B2 JP2008072733A JP2008072733A JP5445729B2 JP 5445729 B2 JP5445729 B2 JP 5445729B2 JP 2008072733 A JP2008072733 A JP 2008072733A JP 2008072733 A JP2008072733 A JP 2008072733A JP 5445729 B2 JP5445729 B2 JP 5445729B2
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resin
molding resin
internal combustion
combustion engine
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昌弘 片山
豪乃助 稲村
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Diamond Electric Manufacturing Co Ltd
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Description

この発明は、内燃機関用制御部品に関し、特に多色成形による内燃機関用制御部品の構造に関する。   The present invention relates to a control part for an internal combustion engine, and more particularly to the structure of a control part for an internal combustion engine by multicolor molding.

従来の技術による内燃機関用点火コイルの縦断面図を図6に示し、従来の技術によるイグナイタ外装の図を図7に示し、従来の技術を適用したイグナイタ外装の第1成形段階の図を図8に示す。図6において、従来の技術による内燃機関用点火コイル1は、上部のイグナイタ20と、円筒部のコイル部とで構成される。コイル部は、コア11と、コア11と同軸的に1次コイル12と2次コイル13とが、前記コア11により電磁結合されて円筒状ケース14に収容され、構成する。円筒状ケース14上部には、イグナイタ20として、図示しないスイッチング素子と、前記1次コイル12に電源を供給したり、1次コイル電流をスイッチング制御する図示しないスイッチング素子に点火信号を供給する外部接続用端子22と、を内部に配置し、これらを収容するイグナイタ外装21を備える。イグナイタ外装21には、内部に配置されるスイッチング素子を実装した電子部品等をエポキシ樹脂25によりモールドして、イグナイタ20を構成する。   FIG. 6 is a longitudinal sectional view of an ignition coil for an internal combustion engine according to the prior art, FIG. 7 is a view of an igniter exterior according to the prior art, and a diagram of a first molding stage of the igniter exterior to which the prior art is applied. It is shown in FIG. In FIG. 6, a conventional internal combustion engine ignition coil 1 includes an upper igniter 20 and a cylindrical coil portion. The coil portion is configured by a core 11 and a primary coil 12 and a secondary coil 13 that are coaxially connected to the core 11 and electromagnetically coupled by the core 11 and accommodated in a cylindrical case 14. An igniter 20 is connected to a switching element (not shown) and an external connection for supplying an ignition signal to the switching element (not shown) for controlling the switching of the primary coil current. An igniter exterior 21 that houses the terminal 22 and accommodates them is provided. An igniter 20 is configured by molding an electronic component or the like mounted with a switching element disposed inside the igniter exterior 21 with an epoxy resin 25.

また図7乃至図8において、イグナイタ外装21は、プラスチックの射出成形にて作製され、外部接続用端子22の一部が露出するよう開口したタイバーカット孔24を有しており、外部接続用端子22をインサート成形した後、不要な端子をタイバーカット孔24よりタイバーカットにて切断し、追加の射出成形を行う事で封止している。若しくはイグナイタ外装21は、電子部品等を実装したあとにタイバーカット孔24にエポキシ樹脂25を流し込む事で封止している。   7 to 8, the igniter exterior 21 is manufactured by plastic injection molding, and has a tie bar cut hole 24 opened so that a part of the external connection terminal 22 is exposed. After insert molding 22, unnecessary terminals are cut by tie bar cut from tie bar cut holes 24 and sealed by performing additional injection molding. Alternatively, the igniter exterior 21 is sealed by pouring an epoxy resin 25 into the tie bar cut hole 24 after mounting an electronic component or the like.

また、上記イグナイタ外装の他に、特開平11−077687号公報(特許文献1)では、金属端子が支持体(1次成形物)と、支持体を覆う樹脂と(2次成形物)で支持されている樹脂成形型電子部品が開示されており、特開平11−019937号公報(特許文献2)では、二次成形面よりも内側に一次モールド成形品を配置したモールド成形品が開示されており、特開2001−293744号公報(特許文献3)では、複数のインサート用の部品を1次成形金型内で1次樹脂により一体化した後、分断工程で複数のインサート用の部品を部品材料から分断して、さらに2次成形工程で1次樹脂により一体化されている複数のインサート用の部品を2次成形金型内で2次樹脂により一体化してインサート成形品を製造するインサート成形品の生産方法が開示されている。
特開平11−077687号 特開平11−019937号 特開2001−293744号
In addition to the above igniter exterior, in Japanese Patent Laid-Open No. 11-076687 (Patent Document 1), a metal terminal is supported by a support (primary molded product) and a resin covering the support (secondary molded product). Japanese Unexamined Patent Publication No. 11-019937 (Patent Document 2) discloses a molded product in which a primary molded product is arranged on the inner side of the secondary molding surface. In JP-A-2001-293744 (Patent Document 3), after a plurality of insert parts are integrated with a primary resin in a primary molding die, a plurality of insert parts are separated in a parting process. Insert components that are separated from the material and that are integrated with the secondary resin in the secondary molding process and integrated with the secondary resin in the secondary molding die to produce an insert molded product. Process for the production of goods have been disclosed.
Japanese Patent Laid-Open No. 11-076687 Japanese Patent Application Laid-Open No. 11-019937 JP 2001-293744 A

しかしながら、従来技術による点火コイル及び外部接続用端子22をイグナイタ外装21と一体化で形成し、内部に配置される電子部品等をエポキシ樹脂25によりモールドしたイグナイタでは、前述のようにインサート成形された外部接続用端子22をタイバーカットした後に、タイバーカット孔24を封止する必要があり、電子部品等を実装したあとにタイバーカット孔24にエポキシ樹脂25を流し込む方法ではワークの反転、エポキシ等の樹脂注入、硬化、乾燥工程の導入と、工数が非常に掛かるという課題を抱えていた。   However, in the igniter in which the ignition coil and the external connection terminal 22 according to the prior art are formed integrally with the igniter exterior 21 and the electronic components and the like arranged inside are molded with the epoxy resin 25, the insert molding is performed as described above. It is necessary to seal the tie bar cut hole 24 after the tie bar cut of the external connection terminal 22, and the method of pouring the epoxy resin 25 into the tie bar cut hole 24 after mounting an electronic component or the like causes the work to be reversed, epoxy, etc. The introduction of resin injection, curing, and drying processes, and the problem that man-hours are very expensive.

また、後工程でのタイバーカット孔24の封止を避けるため、追加の射出成形にて予め穴埋めを行う方法があるが、その場合、追加の射出成形にて成形された樹脂と、イグナイタ外装21の成形樹脂23は互いの密着性が悪く、成形界面からの絶縁性低下等の課題を抱えていた。その理由は、穴埋めの前に成形されたイグナイタ外装21は理想とされる成形条件にて作製されるが、その場合、イグナイタ外装21の樹脂表面の結晶化が進行しており、追加される射出成形の樹脂温度にてイグナイタ外装21の樹脂表面を溶かす事で密着性を確保しようとしても、既にイグナイタ外装21の結晶化が進行している事でイグナイタ外装21の樹脂の溶融が阻害され、充分な密着性が確保出来ない要因となっていた。イグナイタ外装21として成形された成形樹脂23と、追加で成形された樹脂との密着性を上げるには、イグナイタ外装21の樹脂表面の結晶化を抑えれば良いが、それは同時にイグナイタ外装21を理想とする成形条件にて成形出来ない事となり、イグナイタ外装21としての機械的・物理的特性を充分に確保出来ない事となる。   Further, in order to avoid sealing of the tie bar cut hole 24 in a later process, there is a method of filling a hole in advance by additional injection molding. In that case, the resin molded by the additional injection molding and the igniter exterior 21 The molding resin 23 had poor adhesion to each other, and had problems such as a decrease in insulation from the molding interface. The reason is that the igniter exterior 21 molded before filling the hole is produced under ideal molding conditions, but in this case, the crystallization of the resin surface of the igniter exterior 21 has progressed, and an additional injection is performed. Even if an attempt is made to secure adhesion by melting the resin surface of the igniter case 21 at the molding resin temperature, the crystallization of the igniter case 21 has already progressed, and the melting of the resin in the igniter case 21 is hindered. It was a factor that could not secure a good adhesion. In order to increase the adhesion between the molded resin 23 molded as the igniter exterior 21 and the additionally molded resin, crystallization of the resin surface of the igniter exterior 21 may be suppressed, but at the same time, the igniter exterior 21 is ideal. Therefore, the mechanical and physical characteristics as the igniter exterior 21 cannot be sufficiently secured.

また先の特許文献1、2、3においては、イグナイタ外装の樹脂表面の結晶化が進行に対する防止策、成形物の材質、成形条件等については、何ら記載されていない。   Further, in Patent Documents 1, 2, and 3 described above, there are no descriptions regarding measures for preventing crystallization of the resin surface of the igniter exterior from progressing, the material of the molded product, molding conditions, and the like.

上記課題を解決するたけ本発明では次のような内燃機関用制御部品の構成とする。即ち、複数の端子から成る外部接続用端子と、前記複数の端子を一体物として固定させる第1成形樹脂と、当該第1成形樹脂の成形段階とは異なる成形段階で射出成形されるものであって且つ前記外部接続用端子及び前記第1成形樹脂の双方を含んで外装の成形物(外装成形物)を形成する第2成形樹脂と、前記外装成形物の内部に搭載された電子部品をモールドさせるモールド樹脂と、を備える内燃機関用制御部品において、In order to solve the above problems, the present invention has the following configuration of a control component for an internal combustion engine. That is, an external connection terminal composed of a plurality of terminals, a first molding resin for fixing the plurality of terminals as an integral object, and injection molding at a molding stage different from the molding stage of the first molding resin. In addition, a second molding resin that forms both an external connection terminal and the first molding resin to form an exterior molding (exterior molding), and an electronic component mounted inside the exterior molding are molded. In a control part for an internal combustion engine comprising a mold resin,
前記第1成形樹脂は、前記第2成形樹脂と比較して結晶化の性質を抑えた樹脂材が選択されており、前記外部接続用端子は、前記複数の端子を接続させる不要部がカットされた部分(カット部)を有するものであって、前記外装成形物は、前記第2成形樹脂によって前記カット部がインサート成形されていることとする。The first molding resin is selected from a resin material that suppresses the crystallization property compared to the second molding resin, and the external connection terminals are cut at unnecessary portions for connecting the plurality of terminals. In the outer molded product, the cut portion is insert-molded by the second molding resin.

好ましくは、前記第1成形樹脂と前記第2成形樹脂とは、各々の線膨張係数が一致していることとする。Preferably, the first molding resin and the second molding resin have the same linear expansion coefficient.

好ましくは、前記第1成形樹脂と前記第2成形樹脂との界面では、凹凸が形成されていることとする。Preferably, unevenness is formed at the interface between the first molding resin and the second molding resin.

好ましくは、上述した発明の何れかに記載の内燃機関用制御部品は、内燃機関用点火装置に設けられるイグナイタであることとする。Preferably, the internal combustion engine control component according to any of the above-described inventions is an igniter provided in the internal combustion engine ignition device.

また、本発明では次のような内燃機関用制御部品の製造方法としても良い。即ち、In the present invention, the following method for manufacturing a control component for an internal combustion engine may be used. That is,
端子の不要部によって接続された複数の端子から成る外部接続用端子へ第1成形樹脂を形成させ、前記不要部及び前記第1成形樹脂によって前記外部接続用端子を一体物とさせる成形段階と、  Forming a first molding resin on an external connection terminal composed of a plurality of terminals connected by an unnecessary portion of the terminal, and forming the external connection terminal as an integral object by the unnecessary portion and the first molding resin; and
前記外部接続用端子から前記不要部をカットすることで、前記第1成形樹脂によって前記外部接続端子を一体物とさせる成形段階と、By cutting the unnecessary portion from the external connection terminal, a molding step of making the external connection terminal an integral object by the first molding resin,
前記第1成形樹脂と比較して結晶化の性質が優る第2成形樹脂を用いて、前記不要部がカットされた後の一体物に対し射出成形させ、前記不要部がカットされた部分を前記第2成形樹脂によってインサート成形させて外装の成形物を形成させる成形段階と、によって成ることとする。Using a second molding resin that has superior crystallization properties compared to the first molding resin, injection molding is performed on the integral after the unnecessary portion is cut, and the portion where the unnecessary portion is cut is And a molding step of forming an exterior molding by insert molding with the second molding resin.

本発明の構成によれば、内燃機関用制御部品の作製工数の増加を招く事無く、理想とする成形条件にて内燃機関用制御部品の外装を作製する事が可能となり、信頼性の高い内燃機関用制御部品を実現する事ができる。
According to the configuration of the present invention , the exterior of the control component for the internal combustion engine can be manufactured under ideal molding conditions without increasing the number of manufacturing steps of the control component for the internal combustion engine, and the highly reliable internal combustion engine. Engine control parts can be realized.

本発明の構成によれば、第2成形段階において、外部接続用端子を固定している少量の第1成形樹脂と、内燃機関用制御部品の外装の大部分を占める部分を成形する第2成形樹脂との密着性が向上し、樹脂同士の成形界面において高い絶縁性を確保出来るようになる。
According to the configuration of the present invention , in the second molding stage, the second molding that molds a small amount of the first molding resin fixing the external connection terminal and the portion that occupies most of the exterior of the control part for the internal combustion engine Adhesion with the resin is improved, and high insulation can be secured at the molding interface between the resins.

本発明の技術を適用した実施例1を表す第2成形物の図を図1に示し、本発明の技術を適用した実施例を表す第1アッセンの図を図2に示し、第2アッセンの図を図3に示し、本発明の技術を適用した実施例2を表す第2成形物の図を図4に示し、本発明の技術を適用した実施例2を表す第3アッセンの図を図5に示す。以下に説明するイグナイタは、従来技術に定義したものと同等として定義する。以下に実施例を用いて説明する。   FIG. 1 shows a diagram of a second molded product representing Example 1 to which the technology of the present invention is applied. FIG. 2 shows a diagram of the first assembly representing the example to which the technology of the present invention is applied. The figure is shown in FIG. 3, the figure of the 2nd molded product showing Example 2 to which the technique of the present invention is applied is shown in FIG. 4, and the figure of the third assembly representing Example 2 to which the technique of the present invention is applied is shown. As shown in FIG. The igniter described below is defined as equivalent to that defined in the prior art. This will be described below with reference to examples.

図1乃至図3において、本発明の実施例1を表すイグナイタ外装121は、プラスチックの射出成形にて作製され、第1成形段階として、先ずインサートされる外部接続用端子122を少量の第1成形樹脂123にて成形する事で外部接続用端子122が成形樹脂にて固定される。これを第1アッセン131とする。その後、第1アッセン131の外部接続用端子122の不要部分をタイバーカットし、これを第2アッセン132とする。第2アッセン132は、既に第1成形樹脂123にて固定されている事よりタイバーカット後も外部接続用端子122が個別に外れる事はない。   1 to 3, the igniter exterior 121 representing the first embodiment of the present invention is manufactured by plastic injection molding. As a first molding stage, first, the external connection terminal 122 to be inserted is first molded in a small amount. By molding with the resin 123, the external connection terminal 122 is fixed with the molding resin. This is referred to as a first assembly 131. Thereafter, an unnecessary portion of the external connection terminal 122 of the first assembly 131 is tie-bar cut, and this is used as a second assembly 132. Since the second assembly 132 is already fixed with the first molding resin 123, the external connection terminals 122 are not individually detached even after the tie bar cut.

この後、第2成形段階として、前記第2アッセン132をインサートした後、イグナイタ外装121の大部分の形状を占める部分が第2成形樹脂125で射出成形にて作製される。これを第2成形物140とする。   Thereafter, as a second molding step, after the second assembly 132 is inserted, a portion occupying most of the shape of the igniter exterior 121 is produced by injection molding with the second molding resin 125. This is designated as a second molded product 140.

このように本発明の実施例1を示すイグナイタにおいては、前記第2アッセン132をインサートする事で、従来技術のような後工程でのタイバーカット孔24の封止が不要となり、ワークの反転、エポキシ等の樹脂注入、硬化、乾燥工程の導入等の工数を削減する事が可能となる。   Thus, in the igniter showing Example 1 of the present invention, by inserting the second assembly 132, it is not necessary to seal the tie bar cut hole 24 in the post-process as in the prior art, the work is reversed, It becomes possible to reduce man-hours such as introduction of resin such as epoxy, curing, and introduction of a drying process.

また、第1成形樹脂123を、成形後の寸法変化が少なく表面の結晶化を抑えた低結晶化タイプのものを使用し成形すれば、第2成形段階において、第1成形樹脂123の表面を溶かして、イグナイタ外装121の大部分を占める部分を成形する第2成形樹脂125との密着性が向上し、樹脂同士の成形界面において高い絶縁性を確保出来るようになる。   In addition, if the first molding resin 123 is molded using a low crystallization type that has a small dimensional change after molding and suppresses crystallization of the surface, the surface of the first molding resin 123 is formed in the second molding stage. By melting, the adhesiveness with the second molding resin 125 that molds the portion of the igniter exterior 121 is improved, and high insulation can be secured at the molding interface between the resins.

またさらに、第2成形樹脂125は、第1成形樹脂123と線膨張係数が近似したものを選定するとよい。この場合、第1成形樹脂123は低結晶化タイプのものを使用する事を前提とするならば、イグナイタ外装121としての機械的・物理的特性が確保され、熱膨張の差による成形界面の剥離を防止する事ができる。たとえば、第1成形樹脂123としてSABICイノベーティブプラスチックス社製の商品名「Valox507」(線膨張係数:30ppm/℃)、第2成形樹脂125としてSABICイノベーティブプラスチックス社製の商品名「ValoxVIC4311」(線膨張係数:30ppm/℃)を使用する事で達成される。   Furthermore, the second molding resin 125 may be selected from those having a linear expansion coefficient approximate to that of the first molding resin 123. In this case, if it is assumed that the first molding resin 123 is a low crystallization type, the mechanical and physical characteristics as the igniter exterior 121 are ensured, and the molding interface is peeled off due to the difference in thermal expansion. Can be prevented. For example, the product name “Valox507” (linear expansion coefficient: 30 ppm / ° C.) manufactured by SABIC Innovative Plastics as the first molding resin 123, and the product name “ValoxVIC4311” manufactured by SABIC Innovative Plastics as the second molding resin 125 (line) This is achieved by using an expansion coefficient of 30 ppm / ° C.

またさらに、第1成形樹脂123は低結晶化タイプのものを使用する事を前提とするならば、第1成形樹脂123の外周面には、凹凸が形成されているほうがよい。たとえば第1成形樹脂123の金型は、表面が粗い凹凸が施されている事で第1成形樹脂123と第2成形樹脂125の密着性が向上し、樹脂同士の成形界面において高い絶縁性を確保出来るようになる。   Furthermore, if it is assumed that the first molding resin 123 is a low crystallization type, it is preferable that the first molding resin 123 has irregularities on the outer peripheral surface thereof. For example, the mold of the first molding resin 123 has a rough surface, so that the adhesion between the first molding resin 123 and the second molding resin 125 is improved, and high insulation is provided at the molding interface between the resins. It can be secured.

またさらに、イグナイタ外装121の大部分の形状を占める部分(第2成形物140)を成形する際は、第2成形段階にて成形される部分の表面積が、第1成形段階で成形された部分の表面積を上回るように、成形するとよい。これより、第1成形樹脂123は、ほぼ第2成形樹脂125に覆われ、第2成形段階にて成形された樹脂のみを、イグナイタ外装121としての機械的・物理的特性が確保されるように調整された条件の成形が可能となる。   Furthermore, when the portion (second molded product 140) occupying most of the shape of the igniter exterior 121 is molded, the surface area of the portion molded in the second molding stage is the portion molded in the first molding stage. It is good to shape | mold so that the surface area of this may be exceeded. Thus, the first molding resin 123 is almost covered with the second molding resin 125, and only the resin molded in the second molding stage is ensured to have mechanical and physical characteristics as the igniter exterior 121. Molding under adjusted conditions is possible.

本実施例1は、第1成形段階と第2成形段階の2色成形にて、射出成形する内燃機関用点火装置のイグナイタ外装121を説明したが、多色成形など多段階の成形段階においても、初回成形段階から、最終成形段階まで順次回を追うごとに、前回成形段階から次回成形段階までの各成形段階において、本発明を適用できるものである。   In the first embodiment, the igniter exterior 121 of the ignition device for the internal combustion engine that is injection-molded by the two-color molding of the first molding stage and the second molding stage has been described, but also in a multi-stage molding stage such as multi-color molding. The present invention can be applied to each molding stage from the previous molding stage to the next molding stage every time the first molding stage to the final molding stage are sequentially followed.

上述した樹脂特性、樹脂外周面形状、樹脂の線膨張係数、樹脂の溶融エネルギー、成形する金型温度と樹脂温度、各段階で成形された部分の表面積と最終成形段階にて成形される部分の表面積の関係は、第1成形段階と第2成形段階の2色成形におけるそれと、同様にして考慮される事ができる。最終成形段階におけるイグナイタ外装が、機械的・物理的特性が確保されるように調整された成形であるなら、多色成形など多段階の成形段階として、N回(N≧2)に分けた成形段階において、nはn∈Nであり任意の自然数である、前回成形段階の第n−1成形段階における樹脂と、次回成形段階の第n成形段階における樹脂の特性や関係に、適用できる。これより前回成形段階から次回成形段階までの各成形段階においても同等の効果を奏する事ができるものである。したがって、第1成形段階と第2成形段階の2色成形だけでなく、多色成形など多段階の成形段階の前回成形段階から次回成形段階までの各成形段階において、本発明を適用できる。   Resin characteristics, resin outer peripheral surface shape, resin linear expansion coefficient, resin melting energy, mold temperature and resin temperature to be molded, surface area of the molded part at each stage and the part to be molded at the final molding stage The relationship between the surface areas can be considered in the same way as that in the two-color molding of the first molding stage and the second molding stage. If the igniter exterior in the final molding stage is molded so as to ensure mechanical and physical properties, the molding is divided into N times (N ≧ 2) as a multi-stage molding stage such as multicolor molding. In the stage, n is nεN and is an arbitrary natural number, and can be applied to the characteristics and relationship of the resin in the (n−1) -th molding stage of the previous molding stage and the resin in the n-th molding stage of the next molding stage. As a result, the same effect can be obtained in each molding stage from the previous molding stage to the next molding stage. Therefore, the present invention can be applied not only in the two-color molding of the first molding stage and the second molding stage but also in each molding stage from the previous molding stage to the next molding stage of a multi-stage molding stage such as multi-color molding.

したがって、本発明のイグナイタ外装121を多色成形など多段階の成形段階の射出成形にて作製する際、少量の成形樹脂にて固定され、予めタイバーカットを施された第2アッセン132をインサートし、その後、イグナイタ外装121の大部分の形状を占める部分(第2成形物140)を成形する際に、各段階で最適な成形樹脂を選定する事で、従来の従来のタイバーカット孔24の封止工程が不要となり、かつイグナイタ外装121としての機械的・物理的特性を保ったまま、樹脂同士の成形界面の密着強度の向上が可能となり、高い生産性と信頼性を有するイグナイタを安価で提供する事が出来る。   Therefore, when the igniter exterior 121 of the present invention is produced by injection molding in a multi-stage molding stage such as multi-color molding, the second assembly 132 fixed with a small amount of molding resin and pre-cut with a tie bar is inserted. Then, when molding a portion (second molded product 140) occupying most of the shape of the igniter exterior 121, an optimal molding resin is selected at each stage, so that the conventional conventional tie bar cut hole 24 can be sealed. It is possible to improve the adhesion strength at the molding interface between resins while maintaining the mechanical and physical characteristics of the igniter exterior 121 without the need for a stopping process, and provide an igniter with high productivity and reliability at a low cost. I can do it.

また、図4乃至図5において、本発明の実施例2を表すイグナイタ外装121は、プラスチックの射出成形にて作製され、第1成形段階として、端子122a、122bを有した外部接続用端子122を第1成形樹脂123にて拘束して成形する。これは第1アッセン131である。その後、第1アッセン131の外部接続用端子122の不要部分がタイバーカットし、これを第2アッセン132とする。さらにその後、この第2アッセン132の端子122a、122b間にイグナイタ制御をするチップ抵抗やドライバICや、またイグナイタの付加価値を上げるイオン電流制御ICなどの電子部品126を接続し搭載して第3アッセン133を生成する。さらに第2成形段階で、前記第3アッセン133をインサートし、第2成形樹脂125にて射出成形する事で、イグナイタ外装121の大部分の形状を占める部分(第2成形物140)が作製される。   4 to 5, the igniter exterior 121 representing the second embodiment of the present invention is manufactured by plastic injection molding. As a first molding stage, external connection terminals 122 having terminals 122a and 122b are provided. Restrained with the first molding resin 123 and molded. This is the first assembly 131. Thereafter, an unnecessary portion of the external connection terminal 122 of the first assembly 131 is cut by a tie bar, and this is used as the second assembly 132. Thereafter, an electronic component 126 such as a chip resistor or driver IC for controlling the igniter or an ion current control IC for increasing the added value of the igniter is connected and mounted between the terminals 122a and 122b of the second assembly 132. Assen 133 is generated. Further, in the second molding stage, the third assembly 133 is inserted, and injection molding is performed with the second molding resin 125, whereby a portion (second molded product 140) occupying most of the shape of the igniter exterior 121 is produced. The

本実施例2では、電子部品126を搭載した第3アッセン133を第2成形樹脂125にて覆う事で、電子部品126を保護する事ができる。また図示しないが、第2成形段階で作製されたイグナイタ外装121の大部分の形状を占める部分(第2成形物140)に、さらに電子部品126や電子部品等を搭載し、その後の追加の射出成形を行う事で封止して、イグナイタを構成してもよい。本実施例2でも第1成形段階、第2成形段階は、先述した実施例1と同様の成形段階で、構成される事により、イグナイタ外装121としての機械的・物理的特性を保ったまま、樹脂同士の成形界面の密着強度の向上が可能となり、高い生産性と信頼性を有するイグナイタを安価で提供する事が出来る。   In Embodiment 2, the electronic component 126 can be protected by covering the third assembly 133 on which the electronic component 126 is mounted with the second molding resin 125. Although not shown, an electronic component 126, an electronic component, and the like are further mounted on a portion (second molded product 140) that occupies most of the shape of the igniter exterior 121 manufactured in the second molding stage, and then additional injection is performed. The igniter may be configured by sealing by molding. Even in the second embodiment, the first molding stage and the second molding stage are the same molding stage as in the first embodiment described above, so that the mechanical and physical characteristics as the igniter exterior 121 are maintained, The adhesion strength of the molding interface between the resins can be improved, and an igniter having high productivity and reliability can be provided at a low cost.

また本発明の実施例1、2は、イグナイタ外装121が、プラスチックの射出成形にて作製されたものであったが、成形方法は射出成形に限定されない。内燃機関用点火プラグの真上に配置された点火コイルを駆動させるイグナイタであって、点火コイル及び外部接続用端子122をイグナイタ外装121と一体化で形成し、内部に配置される電子部品等をモールド樹脂にてモールドした内燃機機関用点火装置のイグナイタにおいて、イグナイタ外装121として樹脂を形成できる成形方法なら、どのような方法でも適用できる。またイグナイタ外装121は、プラスチックに限定されず、イグナイタ外装121としての機械的・物理的特性を保ったまま、樹脂同士の成形界面の密着強度の向上が可能となり、高い生産性と信頼性を有するイグナイタを安価で提供する事が出来るものであれば、その他の熱可塑性樹脂も適用できる。   In Examples 1 and 2 of the present invention, the igniter exterior 121 is produced by plastic injection molding, but the molding method is not limited to injection molding. An igniter for driving an ignition coil disposed directly above an ignition plug for an internal combustion engine, wherein the ignition coil and the external connection terminal 122 are formed integrally with the igniter exterior 121, and an electronic component or the like disposed inside is formed. In the igniter of the internal combustion engine ignition device molded with the mold resin, any method can be applied as long as the molding method can form the resin as the igniter exterior 121. Further, the igniter exterior 121 is not limited to plastic, and it is possible to improve the adhesion strength of the molding interface between resins while maintaining the mechanical and physical characteristics as the igniter exterior 121, and has high productivity and reliability. Other thermoplastic resins can be applied as long as the igniter can be provided at low cost.

また実施例1、2は、内燃機関用点火コイルのイグナイタについて説明したが、本発明はこれに限定されない。イオン電流制御や点火制御を行うハイブリッドICに代表されるICチップや抵抗、コンデンサなどの電子部品を同一枚基板上にまとめて組み込んだ内燃機関用点火装置や、点火装置でなくても、エンジンなどの内燃機関の始動と停止によって生じる冷熱ストレスに曝される環境で使用され、エンジン制御や、駆動する車両の制御や、その他の信号情報を処理などする内燃機関用制御部品であれば適用できることは言うまでもない。本発明の技術を内燃機関用制御部品に適用することにより、多色成形で形成された外装と内部に配置される部品は、充分な密着性の確保、機械的・物理的特性が確保、また熱膨張の差による成形界面の剥離を防止でき、高い生産性と信頼性を有する内燃機関用制御部品を提供することができる。   Moreover, although Example 1, 2 demonstrated the igniter of the ignition coil for internal combustion engines, this invention is not limited to this. Ignition system for internal combustion engines that integrates electronic components such as IC chips, resistors, and capacitors typified by hybrid ICs that perform ion current control and ignition control on the same substrate, and engines that do not require ignition systems It can be applied to any control component for an internal combustion engine that is used in an environment that is exposed to thermal stress caused by starting and stopping of the internal combustion engine and that processes engine control, driving vehicle control, and other signal information. Needless to say. By applying the technology of the present invention to a control part for an internal combustion engine, the exterior formed by multicolor molding and the parts arranged inside are ensured sufficient adhesion, mechanical and physical characteristics, and It is possible to provide a control part for an internal combustion engine that can prevent peeling of the molding interface due to a difference in thermal expansion and has high productivity and reliability.

以上、本発明について実施例に基づいて説明したが、本発明の実施の形態は上記形態に限定されるものではなく、本発明の精神に基づき、本発明の請求項の文言内容に同一な当業者が行いうる種々の変形的形態、改良的形態で実施する事も可能である。   The present invention has been described above based on the embodiments. However, the embodiment of the present invention is not limited to the above-described embodiments, and is based on the spirit of the present invention and is the same as the wording of the claims of the present invention. It is also possible to carry out various modifications and improvements that can be made by a trader.

本発明の技術を適用した実施例1を表す第2成形物の図である。It is a figure of the 2nd molded product showing Example 1 to which the technique of the present invention is applied. 本発明の技術を適用した実施例を表す第1アッセンの図である。It is a figure of the 1st assembly showing the example to which the art of the present invention is applied. 第2アッセンの図である。It is a figure of the 2nd Assen. 本発明の技術を適用した実施例2を表す第2成形物の図である。It is a figure of the 2nd molded product showing Example 2 to which the technique of the present invention is applied. 本発明の技術を適用した実施例2を表す第3アッセンの図である。It is a figure of the 3rd assembly showing Example 2 to which technology of the present invention is applied. 従来の技術による内燃機関用点火コイルの縦断面図である。It is a longitudinal cross-sectional view of the ignition coil for internal combustion engines by a prior art. 従来の技術によるイグナイタ外装の図である。It is a figure of the igniter exterior by a prior art. 従来の技術を適用したイグナイタ外装の第1成形段階の図である。It is a figure of the 1st shaping | molding step of the igniter exterior to which the conventional technique is applied.

符号の説明Explanation of symbols

1 点火コイル
11 コア
12 1次コイル
13 2次コイル
14 円筒状ケース
20 イグナイタ
21、121 イグナイタ外装
22、122 外部接続用端子
23 成形樹脂
24 タイバーカット孔
25 エポキシ樹脂
122a、122b 端子
123 第1成形樹脂
125 第2成形樹脂
126 電子部品
130 第1成形物
131 第1アッセン
132 第2アッセン
132 第3アッセン
140 第2成形物
DESCRIPTION OF SYMBOLS 1 Ignition coil 11 Core 12 Primary coil 13 Secondary coil 14 Cylindrical case 20 Igniter 21, 121 Igniter exterior 22, 122 External connection terminal 23 Molding resin 24 Tie bar cut hole 25 Epoxy resin 122a, 122b Terminal 123 First molding resin 125 Second molded resin 126 Electronic component 130 First molded product 131 First assembly 132 Second assembly 132 Third assembly 140 Second molded product

Claims (5)

複数の端子から成る外部接続用端子と、前記複数の端子を一体物として固定させる第1成形樹脂と、当該第1成形樹脂の成形段階とは異なる成形段階で射出成形されるものであって且つ前記外部接続用端子及び前記第1成形樹脂の双方を含んで外装の成形物(外装成形物)を形成する第2成形樹脂と、前記外装成形物の内部に搭載された電子部品をモールドさせるモールド樹脂と、を備える内燃機関用制御部品において、
前記第1成形樹脂は、前記第2成形樹脂と比較して、結晶化の性質を抑えた樹脂材が選択されており、
前記外部接続用端子は、前記複数の端子を接続させる不要部がカットされた部分(カット部)を有するものであって、
前記外装成形物は、前記第2成形樹脂によって前記カット部がインサート成形されている、ことを特徴とする内燃機関用制御部品。
An external connection terminal composed of a plurality of terminals, a first molding resin for fixing the plurality of terminals as an integrated object, and a molding step different from the molding step of the first molding resin; and A second molding resin that forms both an external connection terminal and the first molding resin to form an exterior molded product (exterior molded product), and a mold that molds an electronic component mounted inside the exterior molded product A control part for an internal combustion engine comprising a resin,
As the first molding resin, a resin material that suppresses the crystallization property as compared with the second molding resin is selected.
The external connection terminal has a portion where an unnecessary portion for connecting the plurality of terminals is cut (cut portion),
The control part for an internal combustion engine , wherein the outer molded product is insert-molded with the second molding resin .
前記第1成形樹脂と前記第2成形樹脂とは、各々の線膨張係数が一致していることを特徴とする請求項1に記載の内燃機関用制御部品。2. The control component for an internal combustion engine according to claim 1, wherein the first molding resin and the second molding resin have the same linear expansion coefficient. 前記第1成形樹脂と前記第2成形樹脂との界面では、凹凸が形成されていることを特徴とする請求項1又は請求項2に記載の内燃機関用制御部品。The control part for an internal combustion engine according to claim 1 or 2, wherein irregularities are formed at an interface between the first molding resin and the second molding resin. 請求項1乃至請求項3の何れか一項に記載の内燃機関用制御部品は、内燃機関用点火装置に設けられるイグナイタであることを特徴とする内燃機関用制御部品。The internal combustion engine control component according to any one of claims 1 to 3, wherein the internal combustion engine control component is an igniter provided in an internal combustion engine ignition device. 端子の不要部によって接続された複数の端子から成る外部接続用端子へ第1成形樹脂を形成させ、前記不要部及び前記第1成形樹脂によって前記外部接続用端子を一体物とさせる成形段階と、Forming a first molding resin on an external connection terminal composed of a plurality of terminals connected by an unnecessary portion of the terminal, and forming the external connection terminal as an integral object by the unnecessary portion and the first molding resin; and
前記外部接続用端子から前記不要部をカットすることで、前記第1成形樹脂によって前記外部接続端子を一体物とさせる成形段階と、By cutting the unnecessary portion from the external connection terminal, a molding step of making the external connection terminal an integral object by the first molding resin,
前記第1成形樹脂と比較して結晶化の性質が優る第2成形樹脂を用いて、前記不要部がカットされた後の一体物に対し射出成形させ、前記不要部がカットされた部分を前記第2成形樹脂によってインサート成形させて外装の成形物を形成させる成形段階と、Using a second molding resin that has superior crystallization properties compared to the first molding resin, injection molding is performed on the integral after the unnecessary portion is cut, and the portion where the unnecessary portion is cut is A molding step of forming an exterior molding by insert molding with the second molding resin;
によって成る内燃機関用制御部品の製造方法。A method for manufacturing a control part for an internal combustion engine comprising:
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