JPH08327644A - Manufacture of rotation sensor - Google Patents

Manufacture of rotation sensor

Info

Publication number
JPH08327644A
JPH08327644A JP13363195A JP13363195A JPH08327644A JP H08327644 A JPH08327644 A JP H08327644A JP 13363195 A JP13363195 A JP 13363195A JP 13363195 A JP13363195 A JP 13363195A JP H08327644 A JPH08327644 A JP H08327644A
Authority
JP
Japan
Prior art keywords
molded product
resin
primary molded
insert
hole
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
Application number
JP13363195A
Other languages
Japanese (ja)
Inventor
Hisao Kodaira
小平久夫
Minoru Kusakabe
稔 日下部
Toshimi Sekiguchi
関口敏美
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Marelli Corp
Original Assignee
Kansei Corp
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 Kansei Corp filed Critical Kansei Corp
Priority to JP13363195A priority Critical patent/JPH08327644A/en
Publication of JPH08327644A publication Critical patent/JPH08327644A/en
Pending legal-status Critical Current

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  • Transmission And Conversion Of Sensor Element Output (AREA)

Abstract

PURPOSE: To fill a hole made by drawing out a clamp pin surely with resin and to close the hole perfectly by filling the hole under the holding pressure of pressure injected resin and then pressing the resin forcibly by inserting a pin. CONSTITUTION: A primary molding A is supported by means of a plurality of clamp pins 10 and positioned in the center of cavity 17 of insert molding dies 11, 12. Thermoplastic resin is then pressure injected into the cavity A and the pins 10 are drawn out before the resin is cured. Resin is then fed into the hole made by drawing out the pin 10 by the pressure inserting force of resin being sustained as it is. Subsequently, the pin 10 is pushed in again thus pressing the resin fed into the hole up to the midway of the hole. Consequently, the hole is surely filled with resin and a sealing layer 14 excellent in watertightness can be obtained.

Description

【発明の詳細な説明】Detailed Description of the Invention

【0001】[0001]

【産業上の利用分野】本発明は、例えば自動車の車輪回
転数を検知するために車体に取付け使用される電磁ピッ
クアップ方式の回転センサであって、特に樹脂封止型回
転センサの製造方法に関するものである。
BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an electromagnetic pickup type rotation sensor mounted on a vehicle body for detecting the number of rotations of an automobile wheel, and more particularly to a method for manufacturing a resin-sealed rotation sensor. Is.

【0002】[0002]

【従来の技術】一般的な車両にあっては、その車輪の回
転数を検出するための回転センサが設備されている。
2. Description of the Related Art A general vehicle is equipped with a rotation sensor for detecting the rotation speed of its wheels.

【0003】通常、車体に取付け使用されるこの種の回
転センサは、電磁ピックアップ方式のセンサであって、
例えば図6で示す如き構造のものである。
A rotation sensor of this type which is usually attached to a vehicle body and used is an electromagnetic pickup type sensor.
For example, it has a structure as shown in FIG.

【0004】すなわち、1は電磁ピックアップ方式の回
転センサであって、この回転センサ1は、自動車の車軸
と一体のナックルハブに取付けられている周面凹凸のセ
ンサロータ2に近設配置されており、その回転センサ1
に内蔵されている磁極端に、センサロータ2の凸部が繰
返し接近することで生じる磁気的変化を、その回転セン
サ1内に内蔵されているピックアップコイル7(磁気変
化検出用コイル)により生じる電流変化で検出する構造
のものである。
That is, 1 is an electromagnetic pickup type rotation sensor, and this rotation sensor 1 is disposed near a sensor rotor 2 having an uneven peripheral surface attached to a knuckle hub integral with an axle of an automobile. , Its rotation sensor 1
The magnetic change caused by the convex portion of the sensor rotor 2 repeatedly approaching the magnetic pole end incorporated in the rotor is caused by the current generated by the pickup coil 7 (magnetic change detection coil) incorporated in the rotation sensor 1. It has a structure that is detected by a change.

【0005】このような電磁ピックアップ方式の回転セ
ンサの内部構造は、棒状マグネット3及びヨーク4、さ
らには一対の端子バー5A,5Bをインサートしてなる
ボビン6と、このボビン6の外周面であって、上記マグ
ネット3及びヨーク4の周囲に対応して巻回されかつ両
端が前記端子バー5A,5Bに接続される前記コイル7
を有し、さらに上記コイル及びそのコイル端と端子との
接続部が埋設されるように形成され、さらには前記双方
の端子バー5A,5Bのコイル接続端と反対側の端部
を、不図示の相手コネクタとの接続端子5C,5Dとし
て内装するコネクタハウジング部8を一体成形するセン
サケーシング9とからなっている。
The internal structure of such an electromagnetic pickup type rotation sensor is a bobbin 6 having a bar magnet 3 and a yoke 4, and a pair of terminal bars 5A and 5B inserted therein, and an outer peripheral surface of the bobbin 6. The coil 7 which is wound around the magnet 3 and the yoke 4 and whose both ends are connected to the terminal bars 5A and 5B.
Is formed so that the coil and the connecting portion between the coil and the coil end and the terminal are embedded, and further, the end portions of the both terminal bars 5A and 5B opposite to the coil connecting end are not shown. And a sensor casing 9 integrally formed with a connector housing portion 8 which is internally provided as connection terminals 5C and 5D with the mating connector.

【0006】このように構成される回転センサ1を製造
する工程は、先ず図7で示す如き一次成形品Aを得る。
この一次成形品Aはマグネット3とヨーク4及び一対の
端子バー5A,5Bをインサートしてなる樹脂製のボビ
ン6を成形し、次いでそのボビンの外周面かつマグネッ
ト3、ヨーク4に対応する位置にコイル7を巻回保持せ
しめ、このコイル7の両端を一対の端子バー5A,5B
のターミナル5E,5Fに接続して得られる。
In the process of manufacturing the rotation sensor 1 having the above structure, first, a primary molded product A as shown in FIG. 7 is obtained.
The primary molded product A is formed by molding a resin bobbin 6 into which the magnet 3, the yoke 4 and the pair of terminal bars 5A and 5B are inserted. The coil 7 is wound and held, and both ends of the coil 7 are paired with a pair of terminal bars 5A and 5B.
It can be obtained by connecting to terminals 5E and 5F.

【0007】次にこの一次成形品Aの外側面に熱可塑性
樹脂による封止層とコネクタハウジング部をインサート
成形手段により二次成形するものであるが、この二次成
形を行なうとき、図8で示すように先ずインサート成形
型のキャビテイ空間内において、上記一次成形品Aを浮
上った状態で保持せしめるために、上記一次成形品Aの
ボビン表面をインサート成形型を上下に貫通する複数本
のクランプピン10により上下左右前後方向に変動しな
いように支持せしめる。
Next, a sealing layer made of a thermoplastic resin and a connector housing portion are secondarily molded on the outer surface of the primary molded product A by insert molding means. When this secondary molding is performed, as shown in FIG. As shown in the figure, first, in order to hold the primary molded product A in a floating state in the cavity of the insert molded mold, a plurality of clamps that vertically penetrate the insert mold on the bobbin surface of the primary molded product A are held. It is supported by the pin 10 so that it does not fluctuate in the vertical and horizontal directions.

【0008】次にそれらのクランプピンにより一次成形
品Aを位置決めした状態を維持してその一次成形品Aの
外側に上下一対のインサート成形型11,12を被せ型
閉めする。このとき、一次成形品Aは、インサート成形
型11と12とで形成されるキャビティ空間内の中央部
で浮上った状態で位置される。
Next, while maintaining the state in which the primary molded product A is positioned by these clamp pins, a pair of upper and lower insert molding dies 11 and 12 are put on the outside of the primary molded product A and the mold is closed. At this time, the primary molded product A is positioned so as to float at the central portion in the cavity space formed by the insert molding dies 11 and 12.

【0009】次にそのインサート成形型11,12のキ
ャビティ面と、一次成形品Aの表面との間の狭い空間内
に複数個所に配設されているゲート13から熱可塑性樹
脂を射出させて、一次成形品Aの周囲に一体となって成
形される封止層14及び前記の端子5C,5Dを囲むコ
ネクタハウジング部15及び取付けフランジ部16を一
体成形するものであるが、各ゲート13から上記空間内
に向けて熱可塑性樹脂が送り込まれ、この熱可塑性樹脂
が上記狭いキャビティ空間内に圧入されている途中の流
動時に、その射出圧力を保持したままで前記一次成形品
Aを支持していたそれぞれのクランプピン10を引き抜
き、その射出圧力の保圧によってそのクランプピン10
の引き抜き後に生じる跡穴内へ可塑性樹脂を埋込ませ完
全封止を行なうものである。
Next, a thermoplastic resin is injected from gates 13 arranged at a plurality of places in a narrow space between the cavity surfaces of the insert molding dies 11 and 12 and the surface of the primary molded product A, The sealing layer 14 integrally formed around the primary molded product A, the connector housing portion 15 surrounding the terminals 5C and 5D, and the mounting flange portion 16 are integrally formed. The thermoplastic resin was sent into the space, and when the thermoplastic resin flowed while being pressed into the narrow cavity space, the primary molded product A was supported while maintaining its injection pressure. Each clamp pin 10 is pulled out, and the clamp pin 10 is held by maintaining the injection pressure.
The plastic resin is embedded in the trace hole formed after the drawing of the to completely seal.

【0010】しかる後上記インサート成形型を冷却して
樹脂成形体を硬化せしめた後、型開きし成形品、すなわ
ち表面が封止層14によって気密に封止されている回転
センサを得るものである。
Thereafter, the insert molding die is cooled to cure the resin molding, and then the mold is opened to obtain a molded article, that is, a rotation sensor whose surface is hermetically sealed by the sealing layer 14. .

【0011】このような従来の回転センサ製造方法にお
いては、封止層14形成のための熱可塑性樹脂が、イン
サート成形型11,12と、一次成形品との間で生じて
いる狭いキャビティ空間内を圧送移動される流動過程で
クランプピン10を引き抜き、そのクランプピンが位置
されていたことで形成された跡穴内に、上記熱可塑性樹
脂が、その保圧力で充填されて、その跡穴内が水密的に
完全閉塞されることを期待しているものである。
In such a conventional rotation sensor manufacturing method, the thermoplastic resin for forming the sealing layer 14 is generated in the narrow cavity space between the insert molding dies 11 and 12 and the primary molded product. The clamp pin 10 is pulled out in the flow process of being pumped and moved, and the thermoplastic resin is filled in the trace hole formed by the position of the clamp pin with the holding pressure so that the trace hole is watertight. It is expected to be completely blocked.

【0012】ところが、インサート成形型11,12
と、一次成形品との間で生じている狭いキャビティ空間
内を流動する熱可塑性樹脂は、その流動に伴なう時間の
経過によって溶融温度が低下して硬化しはじめ、これに
よってその熱可塑性樹脂がクランプピンの引き抜き跡の
穴部に到達された熱可塑性樹脂の溶融の度合が不十分と
なって穴部を完全に閉塞することができず、これによっ
て一次成形品を水密に封止できる封止層を得ることが困
難であるといった問題点があった。
However, the insert molds 11 and 12
The thermoplastic resin flowing in the narrow cavity space between the primary molded product and the primary molded product begins to harden due to the decrease of the melting temperature with the lapse of time accompanying the flow. Is unable to completely close the hole because the degree of melting of the thermoplastic resin that has reached the hole where the clamp pin has been pulled out is insufficient, and as a result, the primary molded product can be sealed watertight. There is a problem that it is difficult to obtain a stop layer.

【0013】[0013]

【発明が解決しようとする課題】本発明は、かかる従来
の問題点に着目してなされたもので、回転センサの一次
成形品の外表面に封止層を成形するインサート成形工程
時において、上記一次成形品を、インサート成形型内で
保持していたクランプピンの引き抜き後に形成される跡
穴部内を気密かつ確実に埋めて、その跡穴部を完全密閉
した封止層を構成するようにして、気密性(水密性)に
優れた回転センサを得ることにある。
SUMMARY OF THE INVENTION The present invention has been made in view of the above-mentioned problems of the prior art. In the insert molding step of molding the sealing layer on the outer surface of the primary molding of the rotation sensor, The primary molded product is airtightly and surely filled in the trace hole formed after the clamp pin held in the insert molding die is pulled out to form a sealing layer that completely seals the trace hole. , To obtain a rotation sensor having excellent airtightness (watertightness).

【0014】[0014]

【課題を解決するための手段】上記目的を達成するため
に本発明では、マグネット、ヨーク、端子バー等をイン
サート成形した円形ボビンの外側に、前記ヨークに対応
して磁気変化検出用コイルを巻回保持せしめてなる一次
成形品Aを得、次いでこの一次成形品を、該一次成形品
の表面に封止層を一体成形するためのインサート成形型
内に収納し、さらにその一次成形品の適宜個所を、上記
インサート成形型にて、挿入及び引き抜き可能に貫通す
るクランプピンによって、一次成形品がインサート成形
型内のキャビティ面と隔設保持するように支持し、さら
にインサート成形型の長手方向両端部から該インサート
成形型内に熱可塑性樹脂を圧入して一次成形品の表面と
一体の封止層を成形する回転センサの製造方法におい
て、前記インサート成形型内にセットされた一次成形品
表面と、インサート成形型によって生じるキャビティ空
間内へ熱可塑性樹脂を圧入した後、その圧入圧力を保っ
た状態で上記の各クランプピンを一旦引き抜き、上記保
圧力でクランプピン引き抜き後に生じる跡穴内へ熱可塑
性樹脂が流込んだ後に、上記それぞれのクランプピン先
端を跡穴内の半ばまで挿入して、跡穴内樹脂を強制的に
加圧して跡穴内を強制閉塞する回転センサの製造方法を
特徴としている。
In order to achieve the above object, according to the present invention, a magnetic change detecting coil is wound on the outside of a circular bobbin in which a magnet, a yoke, a terminal bar and the like are insert-molded so as to correspond to the yoke. A primary molded product A that is held once is obtained, and then this primary molded product is housed in an insert molding die for integrally molding a sealing layer on the surface of the primary molded product, and the primary molded product is appropriately The insert molding die supports the part so that the primary molded product is separated from the cavity surface in the insert molding die and held by the clamp pin penetrating through the insert molding die, and further, both ends in the longitudinal direction of the insert molding die. Part of the insert molding die, a thermoplastic resin is press-fitted into the insert molding die to form a sealing layer integral with the surface of the primary molded article. After pressing the thermoplastic resin into the surface of the primary molded product set in the mold and the cavity created by the insert mold, temporarily pull out each clamp pin while maintaining the press fitting pressure, After the thermoplastic resin has flowed into the trace hole generated after pulling out the clamp pin with, the tip of each of the above clamp pins is inserted halfway into the trace hole, and the resin inside the trace hole is forcibly pressed to forcibly close the inside of the trace hole. It features a method of manufacturing a rotation sensor.

【0015】[0015]

【作用】この発明によれば、クランプピンを引き抜いた
後に生じる跡穴内へ、圧入樹脂の保圧力で樹脂が埋込ま
れた後、その埋込め樹脂がクランプピンの強制挿入力で
加圧される。これによって跡穴内への樹脂の充填が確実
となって、該跡穴内が完全閉塞される。
According to the present invention, after the resin is embedded in the hole formed after the clamp pin is pulled out by the holding pressure of the press-fit resin, the embedded resin is pressed by the forced insertion force of the clamp pin. . As a result, the filling of the resin into the pit is ensured and the inside of the pit is completely closed.

【0016】[0016]

【実施例】以下に本発明を図面に示す実施例に基いて詳
細に説明する。
DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be described in detail below with reference to embodiments shown in the drawings.

【0017】図1は本実施例の回転センサ製造時におけ
る特に封止層の成形時の説明図であって、この実施例に
おいても、従来例で述べたと同等の一次成形品Aを、複
数本のクランプピン10を用いて支持し、その一次成形
品Aを上下一対のインサート成形型のキャビティ空間中
央部に浮上った状態で位置決めしておき(図2参照)、
この状態で上記インサート成形型のキャビティ面と前記
一次成形品A表面との間で形成される狭いキャビティ空
間17内に熱可塑性樹脂を、複数個所に配設されている
ゲート13から圧入して、一次成形品Aの表面全体に一
体形成される封止層14及びコネクタハウジング部15
及び取付け用フランジ部16等を射出成形させることは
従来例と変りないことである。
FIG. 1 is an explanatory view during manufacturing of the rotation sensor of this embodiment, particularly during molding of the sealing layer. Also in this embodiment, a plurality of primary molded products A equivalent to those described in the conventional example are prepared. The clamp pin 10 is used to position the primary molded product A in a state of floating in the center of the cavity space of a pair of upper and lower insert molding dies (see FIG. 2).
In this state, the thermoplastic resin is press-fitted into the narrow cavity space 17 formed between the cavity surface of the insert molding die and the surface of the primary molded product A from the gates 13 arranged at a plurality of locations, Sealing layer 14 and connector housing portion 15 which are integrally formed on the entire surface of the primary molded product A
The injection molding of the mounting flange portion 16 and the like is no different from the conventional example.

【0018】そこで本実施例では、上記キャビティ空間
内へ熱可塑性樹脂18をゲート13から圧入した直後
(図3参照)の熱可塑性樹脂が固まらないうちに、それ
らのクランプピン10を一旦引き抜き、さらにはその熱
可塑性樹脂の圧入力を保った状態で、その保圧力で、ク
ランプピン10を引き抜いた後の跡穴内へ熱可塑性樹脂
を流動せしめる(図4参照)。
Therefore, in this embodiment, the clamp pins 10 are once pulled out before the thermoplastic resin 18 is pressed into the cavity space from the gate 13 (see FIG. 3) immediately before the thermoplastic resin is solidified, and While keeping the pressure input of the thermoplastic resin, the holding pressure causes the thermoplastic resin to flow into the trace hole after the clamp pin 10 is pulled out (see FIG. 4).

【0019】次にその跡穴内へ熱可塑性樹脂が流動(移
行)されたタイミングの経過後、一旦引き抜いたクラン
プピン10を再度一次成形品方向へ押し込み、そのクラ
ンプピン10の先端で跡穴内へ流入されている熱可塑性
樹脂を強制的に、その跡穴の半ばまで加圧する(図5参
照)。
Next, after the timing at which the thermoplastic resin flows (migrates) into the trace hole, the once pulled-out clamp pin 10 is pushed again toward the primary molded product, and the tip of the clamp pin 10 flows into the trace hole. Forcibly press the thermoplastic resin to the middle of the pit (see FIG. 5).

【0020】これによってクランプピン引き抜き後に生
じた跡穴内へ保圧力で移行した熱可塑性樹脂が、クラン
プピンによる強制的押圧力を受けるため、その跡穴内へ
の熱可塑性樹脂の充填が確実となり、その跡穴が完成密
閉されて水密性に優れた封止層が得られるものである。
As a result, the thermoplastic resin that has moved into the trace hole after pulling out the clamp pin with a holding force is subjected to the forced pressing force by the clamp pin, so that the filling of the thermoplastic resin into the trace hole is ensured. The trace hole is completed and hermetically sealed to obtain a sealing layer having excellent watertightness.

【0021】[0021]

【発明の効果】本発明は、インサート成形型内にセット
された一次成形品表面と、インサート成形型によって生
じるキャビティ空間内へ熱可塑性樹脂を圧入した後、そ
の圧入圧力を保った状態で上記の各クランプピンを一旦
引き抜き、上記保圧力でクランプピン引き抜き後に生じ
る跡穴内へ熱可塑性樹脂が流込んだ後に、上記それぞれ
のクランプピン先端を跡穴内の半ばまで挿入して、跡穴
内樹脂を強制的に加圧して跡穴内を強制閉塞する回転セ
ンサの製造方法であるから、これによれば、封止層の成
形時において生じるクランプピンの引き抜き後の跡穴内
へ樹脂を加圧状態で強制的に埋め込むことができ、これ
によって上記跡穴が完全に密閉され、水密性に優れた封
止層が形成できるという効果が得られる。
Industrial Applicability According to the present invention, the thermoplastic resin is press-fitted into the surface of the primary molded product set in the insert mold and into the cavity space generated by the insert mold, and then the press-fitting pressure is maintained. Pull out each clamp pin once, and after the thermoplastic resin flows into the trace hole created after pulling out the clamp pin with the above holding pressure, insert the tip of each clamp pin halfway into the trace hole to force the resin in the trace hole. Since this is a method of manufacturing a rotation sensor that pressurizes the inside of the trace hole to forcibly close the inside of the trace hole, according to this method, the resin is forcibly forced into the trace hole after pulling out the clamp pin that occurs during molding of the sealing layer under pressure. It is possible to embed, so that the above-mentioned trace holes are completely sealed, and an effect that a sealing layer excellent in watertightness can be formed can be obtained.

【図面の簡単な説明】[Brief description of drawings]

【図1】本発明実施例の回転センサ製造方法の説明図。FIG. 1 is an explanatory diagram of a rotation sensor manufacturing method according to an embodiment of the present invention.

【図2】本発明実施例の封止層成形工程を示す説明図。FIG. 2 is an explanatory view showing a sealing layer forming step of an example of the present invention.

【図3】本発明実施例の封止層成形工程を示す説明図。FIG. 3 is an explanatory view showing a sealing layer forming step of an example of the present invention.

【図4】本発明実施例の封止層成形工程を示す説明図。FIG. 4 is an explanatory view showing a sealing layer forming step of an example of the present invention.

【図5】本発明実施例の封止層成形工程を示す説明図。FIG. 5 is an explanatory view showing a sealing layer forming step of the embodiment of the present invention.

【図6】従来の回転センサの構造説明図。FIG. 6 is a structural explanatory view of a conventional rotation sensor.

【図7】回転センサ構成過程で得られる一次成形品の説
明図。
FIG. 7 is an explanatory diagram of a primary molded product obtained in a rotation sensor configuration process.

【図8】従来の回転センサ製造時の説明図。FIG. 8 is an explanatory view of manufacturing a conventional rotation sensor.

【符号の説明】 A…一次成形品 10…クランプピ
ン 11…インサート成形上型 12…インサート
成形下型 13…ゲート 14…封止層 15…コネクタハウジング 16…取付用フラ
ンジ部 17…空間 18…熱可塑性樹
脂 19…穴部
[Explanation of Codes] A ... Primary molded product 10 ... Clamp pin 11 ... Insert molding upper mold 12 ... Insert molding lower mold 13 ... Gate 14 ... Sealing layer 15 ... Connector housing 16 ... Mounting flange 17 ... Space 18 ... Heat Plastic resin 19 ... Hole

Claims (1)

【特許請求の範囲】[Claims] 【請求項1】 マグネット、ヨーク、端子バー等をイン
サート成形した円形ボビンの外側に、前記ヨークに対応
して磁気変化検出用コイルを巻回保持せしめてなる一次
成形品Aを得、次いでこの一次成形品を、該一次成形品
の表面に封止層を一体成形するためのインサート成形型
内に収納し、さらにその一次成形品の適宜個所を、上記
インサート成形型にて、挿入及び引き抜き可能に貫通す
るクランプピンによって、一次成形品がインサート成形
型内のキャビティ面と隔設保持するように支持し、さら
にインサート成形型の長手方向両端部から該インサート
成形型内に熱可塑性樹脂を圧入して一次成形品の表面と
一体の封止層を成形する回転センサの製造方法におい
て、前記インサート成形型内にセットされた一次成形品
表面と、インサート成形型によって生じるキャビティ空
間内へ熱可塑性樹脂を圧入した後、その圧入圧力を保っ
た状態で上記の各クランプピンを一旦引き抜き、上記保
圧力でクランプピン引き抜き後に生じる跡穴内へ熱可塑
性樹脂が流込んだ後に、上記それぞれのクランプピン先
端を跡穴内の半ばまで挿入して、跡穴内樹脂を強制的に
加圧して跡穴内を強制閉塞することを特徴とする回転セ
ンサの製造方法。
1. A primary molded product A is obtained by winding and holding a magnetic change detection coil corresponding to the yoke on the outside of a circular bobbin in which a magnet, a yoke, a terminal bar and the like are insert-molded, and then the primary molded product A is obtained. The molded product is housed in an insert molding die for integrally molding a sealing layer on the surface of the primary molded product, and further, appropriate parts of the primary molded product can be inserted and pulled out by the insert molding die. Through the clamp pin that penetrates, the primary molded product is supported so as to be spaced apart from the cavity surface in the insert mold, and the thermoplastic resin is press-fitted into the insert mold from both longitudinal ends of the insert mold. In a method of manufacturing a rotation sensor for molding a sealing layer integral with the surface of a primary molded product, the surface of the primary molded product set in the insert molding die and an insert molding After press-fitting the thermoplastic resin into the cavity created by the mold, pull out each clamp pin while maintaining the press-fitting pressure, and flow the thermoplastic resin into the trace hole created after pulling out the clamp pin with the above holding pressure. A method for manufacturing a rotation sensor, characterized in that, after being inserted, the tips of the respective clamp pins are inserted to the middle of the inside of the trace hole and the resin inside the trace hole is forcibly pressed to forcibly close the inside of the trace hole.
JP13363195A 1995-05-31 1995-05-31 Manufacture of rotation sensor Pending JPH08327644A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP13363195A JPH08327644A (en) 1995-05-31 1995-05-31 Manufacture of rotation sensor

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP13363195A JPH08327644A (en) 1995-05-31 1995-05-31 Manufacture of rotation sensor

Publications (1)

Publication Number Publication Date
JPH08327644A true JPH08327644A (en) 1996-12-13

Family

ID=15109342

Family Applications (1)

Application Number Title Priority Date Filing Date
JP13363195A Pending JPH08327644A (en) 1995-05-31 1995-05-31 Manufacture of rotation sensor

Country Status (1)

Country Link
JP (1) JPH08327644A (en)

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