JP2020020400A - Insert nut and secondary molding method of the same - Google Patents

Insert nut and secondary molding method of the same Download PDF

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JP2020020400A
JP2020020400A JP2018144745A JP2018144745A JP2020020400A JP 2020020400 A JP2020020400 A JP 2020020400A JP 2018144745 A JP2018144745 A JP 2018144745A JP 2018144745 A JP2018144745 A JP 2018144745A JP 2020020400 A JP2020020400 A JP 2020020400A
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nut
resin
screw hole
insert
resin portion
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康弘 笹木
Yasuhiro Sasaki
康弘 笹木
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Yazaki Corp
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Yazaki Corp
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Abstract

To provide an insert nut which can inhibit damage to a mold and a screw part of a nut.SOLUTION: An insert nut 10 formed as a primary molded item includes: a metallic nut 11 which has an opening 15a of a screw hole 15 at the upper surface 12 side and includes a bottomed screw hole which is closed at the lower surface 14 side; and a resin part 20 which exposes the opening 15a of the screw hole 15 of the nut 11 and has a side surface part 21 covering an outer peripheral surface 13 of the nut 11 and a bottom surface part 23 covering the lower surface 14 of the nut 11. A polygonal protruding part 24 is formed at the bottom surface part 23 of the resin part 20. At the upper surface 12 side of the nut 11 of the side surface part 21 of the resin part 20, multiple cutouts 22 are formed at positions facing positions of apexes 24a of the polygonal protruding part 24.SELECTED DRAWING: Figure 4

Description

本発明は、例えば、電子制御ユニット等の締結部材として用いるインサートナット及びその２次成形方法に関する。   The present invention relates to, for example, an insert nut used as a fastening member of an electronic control unit or the like and a secondary molding method thereof.

この種のインサートナットとして、例えば、特許文献１に開示されたものがある。このインサートナット１は、図９及び図１０に示すように、インサート部品として金属製で有底ネジ孔付きの袋ナット２のネジ孔２ａを固定側の金型３の部品設置凹部４に設けられた突出パイプ部５に挿入して、部品設置凹部４に収容し、突出パイプ部５のパイプ孔６を負圧に設定することで、袋ナット２を突出パイプ部５に吸着保持した状態で、可動側の金型８を可動させて両金型３，８を閉じてから、固定側の金型３のゲート７から密閉状のキャビティ９内に溶融樹脂（成形材料）Ｒを注入し、この溶融樹脂Ｒが固化（硬化）することにより、インサート成形されるものである。   As this kind of insert nut, for example, there is one disclosed in Patent Document 1. As shown in FIGS. 9 and 10, the insert nut 1 is provided with a screw hole 2a of a cap nut 2 made of metal and having a screw hole with a bottom as an insert part in a component installation recess 4 of a mold 3 on a fixed side. In the state where the cap nut 2 is sucked and held by the protruding pipe portion 5 by inserting it into the protruding pipe portion 5 and housing it in the component installation recess 4 and setting the pipe hole 6 of the protruding pipe portion 5 to a negative pressure, After the movable mold 8 is moved to close both the molds 3 and 8, a molten resin (molding material) R is injected from the gate 7 of the fixed mold 3 into the closed cavity 9. The solidification (hardening) of the molten resin R results in insert molding.

特開２００６−３２１０６１号公報JP-A-2006-321061 特開２０１３−１９４８１８号公報JP 2013-194818 A

しかしながら、前記従来のインサートナット１では、金属製の袋ナット２のネジ孔２ａを金属製の金型３の突出パイプ部５に挿入して保持しているため、成形を繰り返すなかで金型３の突出パイプ部５が摩耗し易く、この突出パイプ部５に保持される袋ナット２の傾きやガタ付きが大きくなってしまう。即ち、パイプ孔６のエア漏れによる保持力の低下や袋ナット２の傾きが懸念される。   However, in the conventional insert nut 1, the screw hole 2a of the metal cap nut 2 is inserted and held in the protruding pipe portion 5 of the metal mold 3, so that the molding 3 The protruding pipe portion 5 is liable to wear, and the inclination and looseness of the cap nut 2 held by the protruding pipe portion 5 increase. That is, there is a concern that the holding force may decrease due to air leakage from the pipe hole 6 and the cap nut 2 may be inclined.

また、袋ナット２の金型３へのセット時に、ネジ孔２ａのめっき削れや、ネジ孔２ａのネジ部を傷付けてしまう恐れがある。   Further, when the cap nut 2 is set in the mold 3, there is a possibility that the plating of the screw hole 2a may be scraped or the screw portion of the screw hole 2a may be damaged.

そこで、本発明は、前記した課題を解決すべくなされたものであり、金型及びナットのネジ部へのダメージを抑制することができるインサートナット及びその２次成形方法を提供することを目的とする。   Then, this invention was made in order to solve the said subject, and it aims at providing the insert nut which can suppress the damage to the thread part of a metal mold | die and a nut, and its secondary molding method. I do.

本発明は、上面側にネジ孔の開口を有し、かつ下面側が閉塞された有底ネジ孔付きで金属製のナットと、前記ナットのネジ孔の開口を露出させ、該ナットの外周面を覆う側面部及び該ナットの下面を覆う底面部を有する樹脂部と、を備えた１次成形品としてのインサートナットであって、前記樹脂部の底面部には、多角形状の突出部が形成され、前記樹脂部の側面部の前記ナットの上面側には、前記多角形状の突出部の各頂点の位置に対向する位置に複数の切り欠きが形成されていることを特徴とする。   The present invention has an opening of a screw hole on the upper surface side, and a metal nut with a bottomed screw hole closed on the lower surface side, and exposes the opening of the screw hole of the nut, and exposes the outer peripheral surface of the nut. An insert nut as a primary molded product including a covering side portion and a resin portion having a bottom portion covering a lower surface of the nut, wherein a polygonal protrusion is formed on the bottom portion of the resin portion. A plurality of cutouts are formed on the side surface of the resin portion on the upper surface side of the nut at positions opposed to the vertices of the polygonal protrusion.

また、本発明は、前記１次成形品としてのインサートナットの２次成形方法であって、前記ナットの上面が配置される底面と前記各切り欠きに嵌め込まれる位置決め部を有する収容凹部を備えた下金型と、前記樹脂部の突出部と一体成形される成形樹脂部を形成するために前記下金型と共に充填空間を形成する上金型と、を用い、前記位置決め部に前記各切り欠きを挿入しながら、前記ナットの上面を前記収容凹部の底面に配置させ、前記充填空間に前記樹脂部の突出部を位置させるセット工程と、前記充填空間に溶融樹脂を充填して前記樹脂部の突出部を覆うように前記成形樹脂部を成形する成形工程と、を備えることを特徴とする。   Further, the present invention is a secondary molding method of an insert nut as the primary molded product, comprising a receiving recess having a bottom surface on which an upper surface of the nut is arranged and a positioning portion fitted into each of the notches. Using a lower mold and an upper mold that forms a filling space together with the lower mold to form a molded resin part that is integrally molded with the protrusion of the resin part; While inserting, the setting step of arranging the upper surface of the nut on the bottom surface of the housing recess, and positioning the protruding portion of the resin portion in the filling space; And a molding step of molding the molding resin portion so as to cover the protruding portion.

本発明によれば、金型の収容凹部内でのインサート部品の位置規制及び保持を樹脂部分にて行うため、金型及びナットのネジ部へのダメージを抑制することができる。   ADVANTAGE OF THE INVENTION According to this invention, since the position control and holding | maintenance of an insert component in the accommodation recessed part of a metal mold | die are performed in a resin part, damage to the screw part of a metal mold and a nut can be suppressed.

本発明の一実施形態のインサート成形前の袋状のナット（インサート部品）を示す斜視図である。It is a perspective view showing a bag-like nut (insert part) before insert molding of one embodiment of the present invention. 上記袋状のナットをインサート成形したインサートナット（１次成形品）の斜視図である。It is a perspective view of the insert nut (primary molded article) which insert-molded the said bag-shaped nut. 上記インサートナットの上面図である。It is a top view of the said insert nut. 上記インサートナットを下金型の収容凹部内にセットする際の斜視図である。It is a perspective view at the time of setting the said insert nut in the accommodation recessed part of a lower metal mold | die. 上記インサートナットを上下金型内で２次成形（最終成形）する状態を示す断面図である。It is sectional drawing which shows the state which performs the secondary molding (final molding) of the said insert nut in an upper and lower metal mold. 上記２次成形されたインサートナット（２次成形品）を上下金型内から離型する際の斜視図である。It is a perspective view at the time of releasing the above-mentioned secondary molded insert nut (secondarily molded product) from the upper and lower molds. 上記離型されたインサートナットの斜視図である。It is a perspective view of the insert nut released. 上記２次成形されたインサートナットを上面側から見た斜視図である。It is the perspective view which looked at the insert nut which carried out the above-mentioned secondary molding from the upper surface side. 従来のインサート部品としての金属製の袋ナットをインサート成形する途中の状態を示す金型の断面図である。It is sectional drawing of the metal mold | die which shows the state in the middle of insert molding the metal cap nut as a conventional insert part. 上記従来のインサート成形の完了直後の状態を示す金型の断面図である。It is sectional drawing of the metal mold | die which shows the state just after completion of the said conventional insert molding.

以下、本発明の一実施形態を図面に基づいて説明する。   Hereinafter, an embodiment of the present invention will be described with reference to the drawings.

図１は本発明の一実施形態のインサート成形前の袋状のナット（インサート部品）を示す斜視図、図２は同袋状のナットをインサート成形したインサートナット（１次成形品）の斜視図、図３はインサートナットの上面図、図４はインサートナットを下金型の収容凹部内にセットする際の斜視図、図５はインサートナットを上下金型内で２次成形（最終成形）する状態を示す断面図、図６は２次成形されたインサートナット（２次成形品）を上下金型内から離型する際の斜視図、図７は離型されたインサートナットの斜視図、図８は同インサートナットを上面側から見た斜視図である。   FIG. 1 is a perspective view showing a bag-shaped nut (insert part) before insert molding according to an embodiment of the present invention, and FIG. 2 is a perspective view of an insert nut (primary molded product) obtained by insert-molding the bag-shaped nut. , FIG. 3 is a top view of the insert nut, FIG. 4 is a perspective view when the insert nut is set in the accommodation recess of the lower mold, and FIG. 5 is subjected to secondary molding (final molding) of the insert nut in the upper and lower molds. FIG. 6 is a cross-sectional view showing the state, FIG. 6 is a perspective view of the secondary molded insert nut (secondarily molded product) when it is released from the upper and lower molds, and FIG. 7 is a perspective view of the released insert nut. 8 is a perspective view of the insert nut as viewed from above.

図２、図３に示すように、インサートナット１０は、上面１２側に雌ネジ孔（ネジ孔）１５の開口１５ａを有し、かつ、下面１４側が閉塞された有底ネジ孔付きで金属製の図１に示すナット１１と、この袋状のナット１１の雌ネジ孔１５の開口１５ａを露出させ、ナット１１の外周面１３を覆う円筒状の側面部２１及びナット１１の下面１４を覆う底面部２３を有する樹脂部２０と、を備えた１次成形品（中間製品）であり、その２次成形品（最終成形品）である図７に示すインサートナット１０′は、例えば、電子制御ユニット等の締結部材として用いられるものである。   As shown in FIGS. 2 and 3, the insert nut 10 has an opening 15 a of a female screw hole (screw hole) 15 on the upper surface 12, and has a bottomed screw hole whose lower surface 14 is closed and made of metal. 1 and a cylindrical side surface 21 that covers the outer peripheral surface 13 of the nut 11 and a bottom surface that covers the lower surface 14 of the nut 11 by exposing the opening 15 a of the female screw hole 15 of the nut 11 shown in FIG. The insert nut 10 ′ shown in FIG. 7, which is a primary molded product (intermediate product) including the resin portion 20 having the portion 23 and a secondary molded product (final molded product), is, for example, an electronic control unit. Etc. are used as fastening members.

図２〜図４に示すように、樹脂部２０の底面部２３には、六角形状の突出部２４が一体形成されている。また、樹脂部２０の側面部２１の袋状のナット１１の上面１２側には、六角形状の突出部２４の各頂点２４ａの位置に対向する位置に複数の切り欠き２２が形成されている。即ち、樹脂部２０の六角形状の突出部２４の各頂点２４ａと側面部２１の複数の切り欠き２２の位置が同じ位置関係（中心からの角度が同位相の位置）となっている。さらに、複数の切り欠き２２は、Ｖ字凹溝状で等間隔に形成されている。   As shown in FIGS. 2 to 4, a hexagonal protruding portion 24 is integrally formed on the bottom portion 23 of the resin portion 20. A plurality of notches 22 are formed on the side surface 21 of the resin portion 20 on the upper surface 12 side of the bag-shaped nut 11 at positions facing the apexes 24a of the hexagonal protrusions 24. That is, the positions of the vertices 24a of the hexagonal projecting portion 24 of the resin portion 20 and the positions of the plurality of notches 22 of the side surface portion 21 have the same positional relationship (positions whose angles from the center are in the same phase). Further, the plurality of notches 22 are formed at equal intervals in a V-shaped concave groove shape.

また、図３に示すように、樹脂部２０の底面部２３に一体形成された突出部２４は、袋状のナット１１の雌ネジ孔１５の径寸法よりも大きい内接円となる六角形状に形成されている。   As shown in FIG. 3, the protruding portion 24 integrally formed on the bottom portion 23 of the resin portion 20 has a hexagonal shape that forms an inscribed circle larger than the diameter of the female screw hole 15 of the bag-shaped nut 11. Is formed.

次に、前記実施形態のインサートナット１０の２次成形の手順を図４〜図６に沿って説明する。   Next, a procedure of secondary molding of the insert nut 10 of the embodiment will be described with reference to FIGS.

まず、インサートナット１０を２次成形する際に、袋状のナット１１の上面１２が配置される底面４２と各切り欠き２２に嵌め込まれる位置決め部４３を円筒状の内周面に有する収容凹部４１を備えた固定側で金属製の下金型４０と、樹脂部２０の突出部２４と一体成形される成形樹脂部３０を形成するために下金型４０の成形面４４と共に密閉状のキャビティ（密閉状の充填空間）Ｋを形成する成形面５４を有した可動側で金属製の上金型５０と、を用いる。この下金型４０の複数の位置決め部４３は、１次成形品であるインサートナット１０を位置決めするものであり、逆Ｖ字凸状で等間隔に形成されていると共に、インサート成形時の溶融樹脂（成形材料）Ｒの流動方向に対応した位置となっている。   First, when the insert nut 10 is secondarily formed, a housing recess 41 having a bottom surface 42 on which the upper surface 12 of the bag-shaped nut 11 is arranged and a positioning portion 43 fitted on each notch 22 on a cylindrical inner peripheral surface. In order to form the lower mold 40 made of metal on the fixed side and the molded resin part 30 integrally molded with the protruding part 24 of the resin part 20, a hermetically closed cavity (with the molding surface 44 of the lower mold 40) is formed. The upper mold 50 made of metal on the movable side having the molding surface 54 forming the closed filling space K is used. The plurality of positioning portions 43 of the lower mold 40 are for positioning the insert nut 10 as a primary molded product, are formed in an inverted V-shaped convex shape at equal intervals, and have a molten resin at the time of insert molding. (Molding material) The position corresponds to the flow direction of R.

そして、図４に示すように、下金型４０の各位置決め部４３にインサートナット１０の樹脂部２０の各切り欠き２２を挿入しながら、インサートナット１０の袋状のナット１１の上面１２を下金型４０の収容凹部４１の底面４２に配置させ、キャビティＫに樹脂部２０の六角形状の突出部２４を位置させる（セット工程）。   Then, as shown in FIG. 4, while inserting the notches 22 of the resin portion 20 of the insert nut 10 into the respective positioning portions 43 of the lower mold 40, the upper surface 12 of the bag-shaped nut 11 of the insert nut 10 is lowered. The hexagonal protrusion 24 of the resin portion 20 is located in the cavity K at the bottom surface 42 of the recess 41 of the mold 40 (setting step).

次に、図５に示すように、密閉状のキャビティＫに溶融樹脂Ｒを充填して樹脂部２０の突出部２４を覆うように成形樹脂部３０を射出成形する（成形工程）。   Next, as shown in FIG. 5, the molding resin part 30 is injection-molded so as to cover the protruding part 24 of the resin part 20 by filling the closed cavity K with the molten resin R (molding step).

次に、溶融樹脂Ｒが固化（硬化）した後で、図６に示すように、固定側の下金型４０から可動側の上金型５０を離型して２次成形（最終成形）されたインサートナット１０′を取り出す。   Next, after the molten resin R is solidified (hardened), as shown in FIG. 6, the movable upper mold 50 is released from the fixed lower mold 40 and subjected to secondary molding (final molding). Take out the inserted nut 10 '.

このように、固定側の下金型４０の収容凹部４１内でのインサート２次部品であるインサートナット１０の位置規制及び保持をインサートナット１０の樹脂部分である樹脂部２０の側面部２１の各切り欠き２２及び下金型４０の収容凹部４１の位置決め部４３にて行うため、下金型４０及び袋状のナット１１の雌ネジ孔１５のネジ部へのダメージを抑制することができる。   As described above, the position regulation and the holding of the insert nut 10 which is the secondary insert part in the accommodation recess 41 of the lower mold 40 on the fixed side are performed by the side portions 21 of the resin portion 20 which is the resin portion of the insert nut 10. Since the positioning is performed at the notch 22 and the positioning portion 43 of the accommodation concave portion 41 of the lower mold 40, damage to the screw portion of the female screw hole 15 of the lower mold 40 and the bag-shaped nut 11 can be suppressed.

また、図５に示すように、下金型４０の収容凹部４１内にインサートナット１０を挿入してセットする際に、下金型４０の収容凹部４１の円筒状の内周面４１ａに樹脂部２０の側面部２１の外周面２１ａが摺接して規制されるため、インサートナット１０を下金型４０の収容凹部４１内に傾くことなくセットすることがきる。   As shown in FIG. 5, when the insert nut 10 is inserted and set in the housing recess 41 of the lower mold 40, a resin portion is formed on the cylindrical inner peripheral surface 41 a of the housing recess 41 of the lower mold 40. Since the outer peripheral surface 21 a of the side surface portion 21 of the 20 is slidably contacted and regulated, the insert nut 10 can be set in the receiving recess 41 of the lower mold 40 without tilting.

さらに、樹脂部２０の突出部２４を六角形状とすることで、図示しない相手側のボルトに締め付ける際の締付トルクによって回ってしまうことを防止することができる。   Further, by forming the protruding portion 24 of the resin portion 20 into a hexagonal shape, it is possible to prevent the resin portion 20 from being turned by a tightening torque when tightening the bolt to a counterpart bolt (not shown).

さらに、成形樹脂部３０を射出成形する際に、樹脂部２０の突出部２４の各頂点２４ａが溶融樹脂Ｒの流動方向に平行に向いていることにより、溶融樹脂Ｒの流れを受け流して、射出圧による影響を抑えることができ、密閉状のキャビティＫに溶融樹脂Ｒを安定した状態で確実に注入することができる。これにより、高品質の２次成形品であるインサートナット１０′を製造することができる。   Further, when the molding resin portion 30 is injection-molded, the apexes 24a of the protruding portions 24 of the resin portion 20 are oriented parallel to the flow direction of the molten resin R, so that the flow of the molten resin R is received and injected. The influence of the pressure can be suppressed, and the molten resin R can be reliably injected into the closed cavity K in a stable state. Thereby, the insert nut 10 'which is a high quality secondary molded product can be manufactured.

尚、前記実施形態によれば、樹脂部の突出部を六角形状に形成したが、四角形状等の他の多角形状に形成しても良い。   In addition, according to the above embodiment, the protruding portion of the resin portion is formed in a hexagonal shape, but may be formed in another polygonal shape such as a square shape.

１０ インサートナット（１次成形品）
１０′ インサートナット（２次成形品：最終成形品）
１１ 袋状のナット
１２ 上面
１３ 外周面
１４ 下面
１５ 雌ネジ孔（ネジ孔）
１５ａ 開口
２０ 樹脂部
２１ 側面部
２２ 切り欠き
２３ 底面部
２４ 六角形状の突出部（多角形状の突出部）
２４ａ 頂点
３０ 成形樹脂部
４０ 下金型
４１ 収容凹部
４２ 底面
４３ 位置決め部
５０ 上金型
Ｋ キャビティ（充填空間）
Ｒ 溶融樹脂（成形材料） 10 Insert nut (primary molded product)
10 'insert nut (secondary molded product: final molded product)
11 Bag-shaped nut 12 Upper surface 13 Outer peripheral surface 14 Lower surface 15 Female screw hole (screw hole)
15a Opening 20 Resin part 21 Side part 22 Notch 23 Bottom part 24 Hexagonal projection (polygonal projection)
24a Apex 30 Molding resin part 40 Lower mold 41 Housing concave part 42 Bottom surface 43 Positioning part 50 Upper mold K cavity (filling space)
R molten resin (molding material)

Claims (4)

上面側にネジ孔の開口を有し、かつ下面側が閉塞された有底ネジ孔付きで金属製のナットと、
前記ナットのネジ孔の開口を露出させ、該ナットの外周面を覆う側面部及び該ナットの下面を覆う底面部を有する樹脂部と、
を備えた１次成形品としてのインサートナットであって、
前記樹脂部の底面部には、多角形状の突出部が形成され、
前記樹脂部の側面部の前記ナットの上面側には、前記多角形状の突出部の各頂点の位置に対向する位置に複数の切り欠きが形成されていることを特徴とするインサートナット。 A metal nut having an opening for a screw hole on the upper surface side and a bottomed screw hole with a closed lower surface side,
A resin portion having a side portion that covers an outer peripheral surface of the nut and a bottom portion that covers a lower surface of the nut, exposing an opening of a screw hole of the nut,
An insert nut as a primary molded product having
A polygonal protrusion is formed on the bottom surface of the resin portion,
An insert nut, wherein a plurality of cutouts are formed on the upper surface side of the nut on the side surface of the resin portion at positions opposite to the positions of the vertices of the polygonal protrusion. 請求項１記載のインサートナットであって、
前記複数の切り欠きは、Ｖ字凹溝状で等間隔に形成されていることを特徴とするインサートナット。 The insert nut according to claim 1, wherein
The plurality of cutouts are formed in a V-shaped concave groove at equal intervals. 上面側にネジ孔の開口を有し、かつ下面側が閉塞された有底ネジ孔付きで金属製のナットと、
前記ナットのネジ孔の開口を露出させ、該ナットの外周面を覆う側面部及び該ナットの下面を覆う底面部を有する樹脂部と、
を備え、
前記樹脂部の底面部には、多角形状の突出部が形成され、
前記樹脂部の側面部の前記ナットの上面側には、前記多角形状の突出部の各頂点の位置に対向する位置に複数の切り欠きが形成されている１次成形品としてのインサートナットの２次成形方法であって、
前記ナットの上面が配置される底面と前記各切り欠きに嵌め込まれる位置決め部を有する収容凹部を備えた下金型と、
前記樹脂部の突出部と一体成形される成形樹脂部を形成するために前記下金型と共に充填空間を形成する上金型と、を用い、
前記位置決め部に前記各切り欠きを挿入しながら、前記ナットの上面を前記収容凹部の底面に配置させ、前記充填空間に前記樹脂部の突出部を位置させるセット工程と、
前記充填空間に溶融樹脂を充填して前記樹脂部の突出部を覆うように前記成形樹脂部を成形する成形工程と、
を備えることを特徴とするインサートナットの２次成形方法。 A metal nut having an opening for a screw hole on the upper surface side and a bottomed screw hole with a closed lower surface side,
A resin portion having a side portion that covers an outer peripheral surface of the nut and a bottom portion that covers a lower surface of the nut, exposing an opening of a screw hole of the nut,
With
A polygonal protrusion is formed on the bottom surface of the resin portion,
A plurality of cutouts are formed on the upper surface side of the nut on the side surface of the resin portion at positions corresponding to the vertices of the polygonal protrusions. The following molding method,
A lower mold including a bottom surface on which the upper surface of the nut is arranged and a housing recess having a positioning portion fitted into each of the notches;
An upper mold that forms a filling space together with the lower mold to form a molded resin part that is integrally formed with the protrusion of the resin part,
While inserting the respective notches into the positioning portion, the upper surface of the nut is arranged on the bottom surface of the housing recess, a setting step of positioning the protrusion of the resin portion in the filling space,
A molding step of molding the molding resin portion so as to cover the projecting portion of the resin portion by filling the filling space with a molten resin,
A secondary molding method for an insert nut, comprising: 請求項３記載のインサートナットの２次成形方法であって、
前記複数の切り欠きは、Ｖ字凹溝状で等間隔に形成され、
前記位置決め部は、逆Ｖ字凸状で等間隔に形成されていることを特徴とするインサートナットの２次成形方法。 A secondary molding method for an insert nut according to claim 3,
The plurality of notches are formed at regular intervals in a V-shaped concave groove shape,
The positioning method according to claim 2, wherein the positioning portion is formed in an inverted V-shape and formed at equal intervals.
JP2018144745A 2018-08-01 2018-08-01 Insert nut and secondary molding method of the same Pending JP2020020400A (en)

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