JPH07304067A - Warpage deformation preventing structure of housing - Google Patents
Warpage deformation preventing structure of housingInfo
- Publication number
- JPH07304067A JPH07304067A JP10088494A JP10088494A JPH07304067A JP H07304067 A JPH07304067 A JP H07304067A JP 10088494 A JP10088494 A JP 10088494A JP 10088494 A JP10088494 A JP 10088494A JP H07304067 A JPH07304067 A JP H07304067A
- Authority
- JP
- Japan
- Prior art keywords
- wall
- housing
- thin inner
- thin
- warp
- 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.)
- Granted
Links
Landscapes
- Moulds For Moulding Plastics Or The Like (AREA)
Abstract
Description
【０００１】[0001]
【産業上の利用分野】本発明は、合成樹脂製のハウジン
グの成形時の反り変形を抑えて相手ハウジングの嵌合性
を高めたハウジングの反り変形防止構造に関するもので
ある。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a warp deformation preventing structure for a housing, which suppresses warp deformation at the time of molding a housing made of synthetic resin to improve mating property of a mating housing.
【０００２】[0002]
【従来の技術】図５に示す従来の雌コネクタハウジング
１１は、ＰＢＴ（ポリブチレンテレフタレート）等の合
成樹脂を材料として、相手側の雄コネクタハウジング
（図示せず）に対する嵌合スペース１２を有するフード
部１３と、該フード部１３の後方に縮幅して連続する端
子収容部１４とを形成して成る。2. Description of the Related Art A conventional female connector housing 11 shown in FIG. 5 is made of synthetic resin such as PBT (polybutylene terephthalate) and has a fitting space 12 for a male connector housing (not shown) on the mating side. A portion 13 and a terminal accommodating portion 14 that is narrowed and continuous to the rear of the hood portion 13 are formed.
【０００３】該フード部１３は樹脂成形において外面１
３ａ側と内面１３ｂ側の熱収縮率の違いにより、図６の
如く上壁１５及び下壁１６が内側に反り変形しやすく、
そのため雄コネクタハウジングの嵌合性が悪化するとい
う問題があった。そこで図７の如く予めフード部１３の
反り変形量を見込んで成形用の金型１７，１８を外側に
湾曲した形状に作製する必要があった。図７でコネクタ
ハウジング１１は内型１７と外型１８の間のスペース１
９内で成形される。The hood portion 13 has an outer surface 1 in resin molding.
Due to the difference in thermal shrinkage between the 3a side and the inner surface 13b side, the upper wall 15 and the lower wall 16 are easily warped and deformed inward as shown in FIG.
Therefore, there is a problem that the fitting property of the male connector housing is deteriorated. Therefore, as shown in FIG. 7, it is necessary to preliminarily consider the amount of warp deformation of the hood portion 13 and manufacture the molding dies 17 and 18 into a shape curved outward. In FIG. 7, the connector housing 11 is a space 1 between the inner mold 17 and the outer mold 18.
Molded within 9.
【０００４】[0004]
【発明が解決しようとする課題】しかしながらコネクタ
ハウジング１１の種類に応じて湾曲量を設定して金型１
７，１８を作製するのは、大変コストのかかる作業であ
った。また製品毎に反り変形量のばらつきを生じて、品
質管理が大変であった。However, the bending amount is set according to the type of the connector housing 11, and the mold 1 is used.
Manufacturing 7, 18 was a very expensive operation. In addition, the amount of warp deformation varies from product to product, making quality control difficult.
【０００５】本発明は、上記した点に鑑み、樹脂成形さ
れるコネクタハウジング等の反り変形量を小さく抑えて
相手コネクタハウジング等との嵌合性を向上させると共
に、成形金型１７，１８の作製に要するコストを低減さ
せ得るハウジングの反り変形防止構造を提供するもので
ある。In view of the above points, the present invention suppresses the warp deformation amount of a resin-molded connector housing or the like to improve the fitting property with a mating connector housing or the like, and at the same time, manufactures the molding dies 17 and 18. The present invention provides a structure for preventing warp deformation of a housing that can reduce the cost required for the above.
【０００６】[0006]
【課題を解決するための手段】上記目的を達成するため
に、本発明は、成形金型内で樹脂成形されるハウジング
において、該ハウジングの外壁の内側に近接して、該外
壁よりも薄い薄肉内壁を形成し、該外壁と該薄肉内壁と
の間に反り吸収隙間を形成し、該薄肉内壁内に相手ハウ
ジングを嵌合させるハウジングの反り変形防止構造を基
本とする。前記外壁と薄肉内壁とを連続する樹脂材充填
用のリブを前記ハウジングの側壁寄りに設けることも可
能である。In order to achieve the above object, the present invention provides a housing, which is resin-molded in a molding die, in the vicinity of the inside of the outer wall of the housing and is thinner and thinner than the outer wall. It is based on a structure for preventing warp deformation of a housing in which an inner wall is formed, a warp absorbing gap is formed between the outer wall and the thin inner wall, and a mating housing is fitted in the thin inner wall. It is possible to provide a rib for filling the resin material, which is continuous with the outer wall and the thin inner wall, near the side wall of the housing.
【０００７】[0007]
【作用】樹脂成形時に先ず薄肉内壁が固化し、次いで外
壁が固化する。該薄肉内壁は内型とコアとの間に位置
し、外壁の外側に外型が位置するから、薄肉内壁の外面
側と内面側とで温度差が少なく、そのため熱収縮が起こ
りにくく、従って反り変形が抑えられる。外壁は反り吸
収隙間内で反り変形し、薄肉内壁に干渉しない。該外壁
によりハウジングの強度が保たれ、反りの少ない薄肉内
壁内に相手ハウジングがスムーズに嵌合する。樹脂材充
填用のリブは側壁寄りにあるほど外壁固化時に薄肉内壁
へ歪みを伝え難い。When the resin is molded, the thin inner wall first solidifies, and then the outer wall solidifies. Since the thin inner wall is located between the inner mold and the core, and the outer mold is located outside the outer wall, the temperature difference between the outer surface side and the inner surface side of the thin inner wall is small, so that heat shrinkage is less likely to occur, and thus the warp Deformation is suppressed. The outer wall is warped and deformed in the warp absorption gap and does not interfere with the thin inner wall. The strength of the housing is maintained by the outer wall, and the mating housing smoothly fits in the thin inner wall with less warpage. The ribs for filling the resin material are closer to the side wall, and the strain is less likely to be transmitted to the thin inner wall when the outer wall is solidified.
【０００８】[0008]
【実施例】図１は、本発明に係るハウジングの反り変形
防止構造の一実施例を示すものである。この構造は、合
成樹脂製の雌コネクタハウジング１のフード部２の上側
と下側の外壁３（下側の外壁は図示を省略する）の内側
に、該外壁３の肉厚Ｔよりも薄い肉厚Ｔ1 の薄肉内壁４
を近接して形成したことを特徴とする。DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS FIG. 1 shows an embodiment of a warp deformation preventing structure for a housing according to the present invention. This structure has a wall thickness thinner than the wall thickness T of the outer wall 3 inside the upper and lower outer walls 3 (lower outer wall is not shown) of the hood portion 2 of the female connector housing 1 made of synthetic resin. Thin wall 4 with thickness T 1
Are formed close to each other.
【０００９】該薄肉内壁４は外壁３と平行に形成され、
該薄肉内壁４と外壁３との間には間隔Ｓなるスリット状
の反り吸収隙間５が形成される。該反り吸収隙間５には
薄肉内壁４と外壁３とを連続する一対のリブ６，６がそ
れぞれ両側壁７，７寄りに形成される。該リブ６，６は
あくまでも薄肉内壁４を樹脂成形するための樹脂材流入
路にすぎない（薄肉内壁４への樹脂材の充填が旨く行わ
れればリブ６はない方がよい）。The thin inner wall 4 is formed parallel to the outer wall 3,
Between the thin inner wall 4 and the outer wall 3, a slit-shaped warp absorbing gap 5 having a space S is formed. In the warp absorbing gap 5, a pair of ribs 6 and 6 connecting the thin inner wall 4 and the outer wall 3 are formed near both side walls 7 and 7, respectively. The ribs 6, 6 are merely the resin material inflow passages for resin-molding the thin inner wall 4 (the rib 6 is preferably not provided if the thin inner wall 4 is filled with the resin material well).
【００１０】フード部２の成形時において該ソリ吸収隙
間５には図示しない板状のコア（金型の中子）が挿通さ
れ、該薄肉内壁４の内側には図示しない内型が、外壁３
の外側には外型がそれぞれ配置される。そして該薄肉内
壁４は板状のコアと内型とに密着した状態で早期に（外
壁よりも早く）固形化し、且つコアは外型と内型との間
に挟まれて位置するから、コアと内型の温度差が少な
く、従って薄肉内壁４の外面４ａと内面４ｂの熱収縮差
が極めて小さく、薄肉内壁４は反り変形することなく、
あるいは極めて小さな反り変形を伴ってほぼ真直に成形
される。それにより図示しない相手側の雄コネクタハウ
ジングを該薄肉内壁４の内面４ｂに沿ってスムーズに嵌
合し得る。When the hood portion 2 is molded, a plate-shaped core (mold core) (not shown) is inserted into the sled absorption gap 5, and an inner mold (not shown) is provided inside the thin inner wall 4 and an outer wall 3 is provided.
Outer molds are arranged on the outer sides of, respectively. The thin inner wall 4 is solidified early (faster than the outer wall) in a state of being in close contact with the plate-shaped core and the inner mold, and the core is located between the outer mold and the inner mold. The temperature difference between the inner mold and the inner mold is small, and therefore the difference in heat shrinkage between the outer surface 4a and the inner surface 4b of the thin inner wall 4 is extremely small, and the thin inner wall 4 does not warp
Alternatively, it is formed almost straight with a very small warp deformation. This allows a mating male connector housing (not shown) to be smoothly fitted along the inner surface 4b of the thin inner wall 4.
【００１１】該薄肉内壁４の板厚Ｔ1 は、相手側雄コネ
クタハウジングに対する嵌合強度及び後述する反り変形
量を考慮して０．８mmないしそれ以下に設定される。す
なわち図２に薄肉内壁４の肉厚Ｔ1 と反り変形量の関係
（測定結果）を示す如く、薄肉内壁４の肉厚Ｔ1 が０．
６mmと０．８mmとではソリ変形量に大差はなく、０．８
mmを越えて１．０mmでは反り変形量が急激に大きくなっ
ている。The plate thickness T 1 of the thin inner wall 4 is set to 0.8 mm or less in consideration of the fitting strength with respect to the mating male connector housing and the warp deformation amount described later. That is, as shown in FIG. 2 which shows the relationship between the thickness T 1 of the thin inner wall 4 and the amount of warp deformation (measurement result), the thickness T 1 of the thin inner wall 4 is 0.
There is no big difference in the amount of warp deformation between 6 mm and 0.8 mm.
At 1.0 mm beyond mm, the amount of warp deformation suddenly increases.
【００１２】これは、薄肉内壁４の肉厚Ｔ1 を厚くする
と成形時における薄肉内壁４の内面４ｂと外面４ａの温
度差が大きくなって樹脂材の収縮率が増加するため、結
果として反り変形を起こし易くなるためと考えられる。
従って、肉厚Ｔ1 が薄いほど樹脂材の収縮率が小さく、
反り変形は少ない。なおこの測定は外壁３の板厚Ｔ＝
２．０mm、外壁３の幅Ｌ＝４０mm、反り吸収隙間Ｓ＝１
mm、リブ６の位置Ｌ1 ＝０．２Ｌの条件で行った。This is because when the wall thickness T 1 of the thin inner wall 4 is increased, the temperature difference between the inner surface 4b and the outer surface 4a of the thin inner wall 4 at the time of molding increases and the shrinkage rate of the resin material increases, resulting in warp deformation. This is considered to be because it is easy to cause.
Therefore, the smaller the wall thickness T 1 , the smaller the shrinkage rate of the resin material,
Little warpage deformation. In this measurement, the thickness T of the outer wall 3 is T =
2.0 mm, outer wall 3 width L = 40 mm, warp absorbing gap S = 1
mm, the position of the rib 6 was L 1 = 0.2 L.
【００１３】また、外壁３の板厚Ｔは、フード部２の強
度と図３の外壁３の板厚Ｔと薄肉内壁４の反り変形量の
関係（測定結果）に基づいて、２．０mm程度が最適と判
断される。すなわち図３の測定結果によれば、薄肉内壁
４の反り変形量は外壁３の板厚Ｔが１．０mmから２．０
mmに増すに伴って反比例的に減少し、２．０mmから２．
５mmにかけては緩やかに減少している。The plate thickness T of the outer wall 3 is about 2.0 mm based on the relationship between the strength of the hood portion 2 and the plate thickness T of the outer wall 3 in FIG. 3 and the warp deformation amount of the thin inner wall 4 (measurement result). Is judged to be optimal. That is, according to the measurement result of FIG. 3, the warp deformation amount of the thin inner wall 4 is 2.0 mm when the plate thickness T of the outer wall 3 is 1.0 mm.
It decreases in inverse proportion to increasing to 2.0 mm from 2.0 mm to 2.
It gradually decreases to 5 mm.
【００１４】これは外壁３の肉厚Ｔを増すほどフード部
２の強度が高まり、薄肉内壁４の反り変形が抑えられる
ものと考えられる。外壁３の肉厚Ｔが２．０mm以上にな
ると薄肉内壁４の変形にほとんど影響を及ぼさない（薄
肉内壁４を変形させない）ものと思われる。あるいは外
壁３の肉厚Ｔが１．０〜１．５mm程度と薄い場合は薄肉
内壁４と外壁３がほぼ同時期に固形化し、薄肉内壁４が
外壁３の反りの影響を受け、外壁３の肉厚Ｔが２．０〜
２．５mm程度と厚い場合には、薄肉内壁４が固形化した
後に外壁３が固形化し、薄肉内壁４が外壁３の影響を受
けないと考えられる。It is considered that as the wall thickness T of the outer wall 3 increases, the strength of the hood portion 2 increases and the warp deformation of the thin inner wall 4 is suppressed. When the wall thickness T of the outer wall 3 is 2.0 mm or more, it is considered that the deformation of the thin inner wall 4 is hardly affected (the thin inner wall 4 is not deformed). Alternatively, when the wall thickness T of the outer wall 3 is as thin as about 1.0 to 1.5 mm, the thin inner wall 4 and the outer wall 3 solidify at substantially the same time, and the thin inner wall 4 is affected by the warp of the outer wall 3 and Wall thickness T is from 2.0
When the thickness is about 2.5 mm, it is considered that the outer wall 3 is solidified after the thin inner wall 4 is solidified, and the thin inner wall 4 is not affected by the outer wall 3.
【００１５】従って外壁３の肉厚Ｔは強度面を考慮して
も１．５mm以上は必要であり、また２．５mmでは過剰で
あり、１．５〜２．０mmが妥当である。なおこの測定条
件はＴ1 ＝０．８mm、Ｌ、Ｌ1 、Ｓは図２の場合と同様
の値で行った。Therefore, the wall thickness T of the outer wall 3 needs to be 1.5 mm or more in consideration of the strength, and 2.5 mm is excessive, and 1.5 to 2.0 mm is appropriate. The measurement conditions were T 1 = 0.8 mm, and L, L 1 , and S were the same values as in FIG.
【００１６】さらに、前記リブ６の位置Ｌ1 は、薄肉内
壁４への樹脂材の充填性と図４のリブ６の位置と薄肉内
壁４の反り変形量の関係に基づいて０．２Ｌ程度が最適
と言える。すなわち薄肉内壁４の反り変形量はリブ６な
しの時が一番小さく、リブ６の位置がハウジングフード
部２の中央に向かうに従ってほぼ比例的に増大する。こ
れは外壁３の反りの影響がリブ６を通じて薄肉内壁４に
及ぶからであり、外壁３の影響を極力なくし、且つ樹脂
材の充填性を良くするリブ位置（Ｌ1 ＝０．２Ｌ）が選
択される。Further, the position L 1 of the rib 6 is about 0.2 L based on the filling property of the resin material into the thin inner wall 4 and the relationship between the position of the rib 6 and the warp deformation amount of the thin inner wall 4 in FIG. It can be said to be optimal. That is, the warp deformation amount of the thin inner wall 4 is the smallest when the rib 6 is not provided, and increases substantially proportionally as the position of the rib 6 moves toward the center of the housing hood portion 2. This is because the influence of the warp of the outer wall 3 reaches the thin inner wall 4 through the ribs 6, and the rib position (L 1 = 0.2L) that minimizes the influence of the outer wall 3 and improves the filling property of the resin material is selected. To be done.
【００１７】また、前記反り吸収隙間５の間隔Ｓはフー
ド部２の肥大化を抑えて且つ外壁３の反りを充分吸収で
きる寸法として０．５mm以上ないし１mm程度に設定され
る。The interval S between the warp absorbing gaps 5 is set to 0.5 mm or more to about 1 mm as a dimension capable of suppressing the enlargement of the hood portion 2 and sufficiently absorbing the warp of the outer wall 3.
【００１８】表１は、本発明の効果として従来のフード
部外壁と本発明に係る薄肉内壁４の反り変形量を比較し
たものであり、薄肉内壁４の反り変形量は従来の外壁の
反り変形量に較べて４０％程度減少する。なお測定条件
はＬ＝４０mm、Ｔ1 ＝０．８mm、Ｌ1 ＝０．２Ｌで行っ
た。Table 1 compares the amount of warp deformation of the conventional outer wall of the hood and the thin inner wall 4 of the present invention as an effect of the present invention. The amount of warp deformation of the thin inner wall 4 is the warp deformation of the conventional outer wall. It is reduced by about 40% compared to the amount. The measurement conditions were L = 40 mm, T 1 = 0.8 mm, and L 1 = 0.2 L.
【表１】 [Table 1]
【００１９】上記実施例はコネクタハウジング１につい
てのものであるが、本願発明はコネクタハウジング以外
にも例えば電子ユニットのケースハウジングやヒューズ
ボックスのハウジングあるいは電気接続箱のハウジング
等にも適用可能である。Although the above embodiment relates to the connector housing 1, the present invention can be applied to a case housing of an electronic unit, a housing of a fuse box, a housing of an electric junction box, etc., in addition to the connector housing.
【００２０】[0020]
【発明の効果】以上の如くに、本発明によれば、ハウジ
ングの薄肉内壁が熱収縮を受けずに大きな反り変形を生
じないから、薄肉内壁内に相手ハウジングをスムーズに
嵌合でき、且つ従来のような成形金型の湾曲形状を設定
する必要がなく、金型コストが低減される。さらに、製
品毎の反り変形量のばらつきが小さく抑えられるから、
歩留りが良く、品質も向上する。As described above, according to the present invention, the thin inner wall of the housing does not undergo thermal contraction and does not undergo a large warp deformation, so that the mating housing can be smoothly fitted into the thin inner wall, and It is not necessary to set the curved shape of the molding die as described above, and the die cost is reduced. Furthermore, since the variation in the amount of warp deformation for each product can be suppressed to a small level,
The yield is good and the quality is improved.
【図面の簡単な説明】[Brief description of drawings]
【図１】本発明に係るハウジングの反り変形防止構造の
一実施例を示す正面図である。FIG. 1 is a front view showing an embodiment of a warp deformation preventing structure for a housing according to the present invention.
【図２】薄肉内壁の肉厚と反り変形量の関係を示すグラ
フである。FIG. 2 is a graph showing the relationship between the thickness of the thin inner wall and the amount of warp deformation.
【図３】外壁の肉厚と薄肉内壁の反り変形量の関係を示
すグラフである。FIG. 3 is a graph showing the relationship between the thickness of the outer wall and the amount of warp deformation of the thin inner wall.
【図４】リブの位置と薄肉内壁の反り変形量の関係を示
すグラフである。FIG. 4 is a graph showing the relationship between the position of ribs and the amount of warp deformation of the thin inner wall.
【図５】従来のコネクタハウジングを示す斜視図であ
る。FIG. 5 is a perspective view showing a conventional connector housing.
【図６】同じく反り変形したフード部を示す正面図であ
る。FIG. 6 is a front view showing the hood portion which is also warped and deformed.
【図７】同じく成形金型を示す縦断面図である。FIG. 7 is a vertical cross-sectional view showing the same molding die.
【符号の説明】 １ コネクタハウジング ３ 外壁 ４ 薄肉内壁 ５ 反り吸収隙間 ６ リブ ７ 側壁[Explanation of reference numerals] 1 connector housing 3 outer wall 4 thin inner wall 5 warp absorption gap 6 rib 7 side wall
Claims (3)
において、該ハウジングの外壁の内側に近接して、該外
壁よりも薄い薄肉内壁を形成し、該外壁と該薄肉内壁と
の間に反り吸収隙間を形成し、該薄肉内壁内に相手ハウ
ジングを嵌合させることを特徴とするハウジングの反り
変形防止構造。1. A housing formed by resin molding in a molding die, wherein a thin inner wall that is thinner than the outer wall is formed in the vicinity of the outer wall of the housing, and a warp is formed between the outer wall and the thin inner wall. A structure for preventing warp deformation of a housing, characterized in that an absorbing gap is formed and a mating housing is fitted in the thin inner wall.
充填用のリブを前記ハウジングの側壁寄りに設けたこと
を特徴とする請求項１記載のハウジングの反り変形防止
構造。2. The structure for preventing warpage and deformation of a housing according to claim 1, wherein a rib for filling the resin material, which is continuous with the outer wall and the thin inner wall, is provided near the side wall of the housing.
れ以下に設定し、前記外壁の肉厚を２．０mmないしそれ
以下に設定し、前記反り吸収隙間を０．５mmないしそれ
以上に設定し、前記リブを前記側壁からハウジングの全
幅の１／５以下の位置に設定したことを特徴とする請求
項１，２記載のハウジングの反り変形防止構造。3. The thickness of the thin inner wall is set to 0.8 mm or less, the thickness of the outer wall is set to 2.0 mm or less, and the warp absorbing gap is set to 0.5 mm or more. 3. The structure for preventing warpage and deformation of a housing according to claim 1, wherein the rib is set at a position of 1/5 or less of the entire width of the housing from the side wall.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP10088494A JP2967906B2 (en) | 1994-05-16 | 1994-05-16 | Structure to prevent warpage of housing |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP10088494A JP2967906B2 (en) | 1994-05-16 | 1994-05-16 | Structure to prevent warpage of housing |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH07304067A true JPH07304067A (en) | 1995-11-21 |
| JP2967906B2 JP2967906B2 (en) | 1999-10-25 |
Family
ID=14285760
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP10088494A Expired - Fee Related JP2967906B2 (en) | 1994-05-16 | 1994-05-16 | Structure to prevent warpage of housing |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2967906B2 (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6589455B2 (en) * | 2000-03-14 | 2003-07-08 | Yazaki Corporation | Method of manufacturing a connector positioning structure |
| JP2018089900A (en) * | 2016-12-06 | 2018-06-14 | コニカミノルタ株式会社 | Optical writing device and image forming device |
-
1994
- 1994-05-16 JP JP10088494A patent/JP2967906B2/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6589455B2 (en) * | 2000-03-14 | 2003-07-08 | Yazaki Corporation | Method of manufacturing a connector positioning structure |
| JP2018089900A (en) * | 2016-12-06 | 2018-06-14 | コニカミノルタ株式会社 | Optical writing device and image forming device |
Also Published As
| Publication number | Publication date |
|---|---|
| JP2967906B2 (en) | 1999-10-25 |
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|---|---|---|---|
| A01 | Written decision to grant a patent or to grant a registration (utility model) |
Free format text: JAPANESE INTERMEDIATE CODE: A01 Effective date: 19990713 |
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| LAPS | Cancellation because of no payment of annual fees |