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WO2019039395A1 - Insert molded article - Google Patents

Insert molded article Download PDF

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Publication number
WO2019039395A1
WO2019039395A1 PCT/JP2018/030485 JP2018030485W WO2019039395A1 WO 2019039395 A1 WO2019039395 A1 WO 2019039395A1 JP 2018030485 W JP2018030485 W JP 2018030485W WO 2019039395 A1 WO2019039395 A1 WO 2019039395A1
Authority
WO
WIPO (PCT)
Prior art keywords
nut
positioning pin
bus bar
mold
fastening member
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.)
Ceased
Application number
PCT/JP2018/030485
Other languages
French (fr)
Japanese (ja)
Inventor
佑次 伊藤
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.)
Sumitomo Wiring Systems Ltd
Original Assignee
Sumitomo Wiring Systems Ltd
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 Sumitomo Wiring Systems Ltd filed Critical Sumitomo Wiring Systems Ltd
Priority to CN201880053686.7A priority Critical patent/CN110997271B/en
Priority to JP2019537599A priority patent/JP6819914B2/en
Publication of WO2019039395A1 publication Critical patent/WO2019039395A1/en
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C33/00—Moulds or cores; Details thereof or accessories therefor
    • B29C33/12—Moulds or cores; Details thereof or accessories therefor with incorporated means for positioning inserts, e.g. labels
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C39/00—Shaping by casting, i.e. introducing the moulding material into a mould or between confining surfaces without significant moulding pressure; Apparatus therefor
    • B29C39/02—Shaping by casting, i.e. introducing the moulding material into a mould or between confining surfaces without significant moulding pressure; Apparatus therefor for making articles of definite length, i.e. discrete articles
    • B29C39/10—Shaping by casting, i.e. introducing the moulding material into a mould or between confining surfaces without significant moulding pressure; Apparatus therefor for making articles of definite length, i.e. discrete articles incorporating preformed parts or layers, e.g. casting around inserts or for coating articles
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C39/00—Shaping by casting, i.e. introducing the moulding material into a mould or between confining surfaces without significant moulding pressure; Apparatus therefor
    • B29C39/22—Component parts, details or accessories; Auxiliary operations
    • B29C39/24—Feeding the material into the mould
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C45/00—Injection moulding, i.e. forcing the required volume of moulding material through a nozzle into a closed mould; Apparatus therefor
    • B29C45/14—Injection moulding, i.e. forcing the required volume of moulding material through a nozzle into a closed mould; Apparatus therefor incorporating preformed parts or layers, e.g. injection moulding around inserts or for coating articles

Definitions

  • the technology disclosed by the present specification relates to an insert-molded article.
  • Patent Document 1 a positioning structure described in Japanese Utility Model Laid-Open Publication No. 2-82506 (the following Patent Document 1) has been known as a tool for performing insert molding in a state where an insert nut is fitted to a positioning pin.
  • a positioning pin is placed in a recess carved in the lower mold, and an insert nut can be fitted to the positioning pin.
  • An internal thread is provided inside the insert nut.
  • the internal thread when the insert nut is fitted to the positioning pin, the internal thread may interfere with the positioning pin, and the internal thread may be damaged.
  • the insert molded article disclosed by the present specification is an insert molded article formed by a mold provided with a positioning pin projecting from the lower mold toward the upper mold, and a counterbore in which the positioning pin is inserted.
  • a metal fastening member provided with a portion opened downward, and a resin housing integrally formed on the outer surface of the fastening member, the fastening member continuing upward from the upper end of the counterbore
  • the positioning pin has a vertical dimension equal to or less than the vertical dimension of the counterbore.
  • the positioning pin when the fastening member is set in the lower mold, although the positioning pin enters the counterbore from below, the positioning pin does not enter the female screw, so the inside of the female screw is configured. Interference of the peripheral wall with the positioning pin can be avoided. Therefore, it is possible to prevent the inner peripheral wall constituting the female screw portion from being damaged by the positioning pin while positioning the fastening member by the positioning pin.
  • the insert molded article disclosed by the present specification may have the following configuration.
  • the fastening member includes a nut provided with the female screw portion and a bus bar on which the lower end portion of the nut is placed, and the counterbore includes a lower opening of the nut and the bus bar It is good also as composition which consists of a penetration hole which penetrated and was provided in the up-and-down direction. According to such a configuration, since the counterbore is provided by the nut and the bus bar, the positioning pin can simultaneously position the nut and the bus bar.
  • the nut may be a bag-like nut whose upper end opposite to the bus bar is closed, and the upper end of the nut may be exposed to the outside from the housing. According to such a configuration, by setting the bus bar and the nut in the lower die and applying the upper die to the upper end portion of the nut from above, the nut and the bus bar can be held between the upper die and the lower die. Therefore, it is possible to reliably prevent resin from infiltrating between the lower end portion of the nut and the upper surface of the bus bar.
  • the insert molded article disclosed by the present specification it is possible to prevent the inner peripheral wall constituting the female screw portion from being damaged by the positioning pin while positioning the fastening member by the positioning pin.
  • the insert molded article 10 of the present embodiment is configured to include a plurality of bus bars 20 and a resin housing 40 integrally molded with the bus bars 20.
  • the insert molded article 10 is formed by insert molding with a mold 50.
  • the mold 50 is composed of an upper mold 51 and a lower mold 52, and the housing 40 is formed by injecting molten resin into a molding cavity 53 formed between the upper mold 51 and the lower mold 52 in the mold closed state.
  • positioning pins 54 are provided on the bottom surface of the lower mold 52 so as to project upward toward the upper mold 51.
  • the positioning pin 54 has a cylindrical shape.
  • the bus bar 20 is made of a conductive metal material, has a plate-like shape as a whole, and is provided with a horizontal portion 21 set along the bottom surface of the lower mold 52.
  • a through hole 23 through which the positioning pin 54 of the lower die 52 is inserted from below is provided in a substantially central portion of the horizontal portion 21 so as to penetrate in the thickness direction (vertical direction).
  • the inner diameter of the through hole 23 is approximately the same as or slightly larger than the diameter of the positioning pin 54.
  • a positioning recess 55 recessed downward according to the outer shape of the horizontal portion 21 of the bus bar 20 is provided on the bottom surface of the lower mold 52.
  • the horizontal portion 21 of the bus bar 20 is positioned by being fitted into the positioning recess 55 while inserting the positioning pin 54 into the through hole 23.
  • the nut 30 is made of a conductive metal material, and has a bag-like shape as a whole, and has a cylindrical portion 31 opening downward, and a cylindrical portion 31 located on the opposite side of the lower opening 33 in the cylindrical portion 31 And an upper end portion 32 closing the upper end opening of the portion 31.
  • An internal thread portion 34 is formed above the lower opening 33 in the internal space of the cylindrical portion 31.
  • the diameter of the lower opening 33 is approximately the same as or slightly larger than the diameter of the positioning pin 54. Further, the inner diameter of the female screw portion 34 is smaller than the diameter of the positioning pin 54.
  • the lower opening 33 and the female screw 34 both have a circular hole shape and extend in the vertical direction, and the female screw 34 is continuously provided above the lower opening 33.
  • the upper and lower dimensions of the female screw portion 34 are larger than the upper and lower dimensions of the lower opening 33.
  • the female screw 34 is disposed coaxially with the lower opening 33, and the inner diameter of the female screw 34 is smaller than the inner diameter of the lower opening 33. While an internal thread is formed on the inner peripheral wall constituting the internal thread portion 34, an internal thread is not formed on the inner peripheral wall constituting the lower opening 33.
  • the inner peripheral wall forming the lower opening 33 and the inner peripheral wall forming the female screw portion 34 are connected by a conical taper portion 35, and the upper end of the positioning pin 54 is located at the lower end of the taper portion 35 There is.
  • the bus bar 20 is mounted on the bottom surface of the lower mold 52 as shown in FIG. Position 21 at a predetermined position. Specifically, the positioning pin 54 is fitted in the through hole 23 and the horizontal portion 21 is fitted in the positioning recess 55, whereby the horizontal positioning of the bus bar 20 is performed. Next, the lower end portion of the nut 30 is placed on the upper surface of the bus bar 20. In this state, the positioning pin 54 is engaged with the lower opening 33 to position the nut 30 in the horizontal direction.
  • the positioning pin 54 is inserted into a counterbore formed by the through hole 23 of the bus bar 20 and the lower opening 33 of the nut 30, but is positioned below the female screw 34. That is, since the vertical dimension of positioning pin 54 is equal to or smaller than the vertical dimension of the counterbore (the space formed by through hole 23 and lower opening 33), the thread of female screw portion 34 is damaged by positioning pin 54. There is nothing to do. At this time, the through hole portion 23 and the lower opening portion 33 are coaxially arranged, and the inner peripheral wall forming the through hole portion 23 and the inner peripheral wall forming the lower opening portion 33 are flush with each other in the vertical direction Will be placed.
  • the ceiling surface of the upper mold 51 abuts on the upper end 32 of the nut 30 from above, and the bus bar 20 and the nut 30 are vertically moved by the upper mold 51 and the lower mold 52 It is in the state of being pinched from.
  • a molding cavity 53 is formed between the ceiling surface of the upper mold 51 and the bottom surface of the lower mold 52.
  • the molten resin is injected into the molding cavity 53, and the molten resin cools and hardens to form the housing 40.
  • the upper mold 51 and the lower mold 52 are opened and the insert molded product 10 is taken out.
  • the housing 40 is integrally formed on the bus bar 20 and the outer surface of the nut 30, and is disposed so as to cover the boundary between the bus bar 20 and the nut 30. For this reason, there is a concern that the molten resin may infiltrate from the boundary between the bus bar 20 and the nut 30 during insert molding. However, since the upper surface of the bus bar 20 and the lower end portion of the nut 30 are in firm contact with each other by the upper mold 51 and the lower mold 52, the molten resin does not enter into the boundary portion between the bus bar 20 and the nut 30. It can be performed.
  • the positioning pin 54 is in the counterbore (the through hole 23 and the lower opening 33) from below. Since the positioning pin 54 does not enter the internal thread portion 34 although it enters the state, interference of the inner peripheral wall constituting the internal thread portion 34 with the positioning pin 54 can be avoided. Therefore, while positioning of the fastening member is performed by the positioning pin 54, the inner circumferential wall constituting the female screw portion 34 can be prevented from being damaged by the positioning pin 54.
  • the fastening member includes a nut 30 provided with a female screw 34 and a bus bar 20 on which the lower end of the nut 30 is placed.
  • the counterbore includes a lower opening 33 of the nut 30, a bus bar 20 may be configured to include a through hole 23 vertically penetrated. According to such a configuration, since the counterbore portion is provided by the nut 30 and the bus bar 20, the positioning pin 54 can simultaneously position the nut 30 and the bus bar 20.
  • the nut 30 may be a bag-like nut in which the upper end 32 opposite to the bus bar 20 is closed, and the upper end 32 of the nut 30 may be exposed from the housing 40 to the outside. According to such a configuration, by setting the bus bar 20 and the nut 30 in the lower mold 52 and applying the upper mold 51 to the upper end portion 32 of the nut 30 from above, the nut 30 and the bus bar 20 can be made into the upper mold 51 and the lower mold. It can be held between 52. Therefore, it is possible to reliably prevent resin from entering between the lower end portion of nut 30 and the upper surface of bus bar 20.
  • the fastening member is constituted by the bus bar 20 and the nut 30 in the above embodiment, it may be a fastening member provided with only the nut 30. Also, the nut 30 need not be a bag-like nut, but may be a nut having a penetrating shape.
  • the bus bar 20 may be positioned only by the positioning recess 55.
  • the diameter of the through hole of the bus bar 20 may be set larger than the diameter of the lower opening 33 of the nut 30.
  • the upper end 32 of the nut 30 is exposed to the outside from the housing 40 in the above embodiment, the upper end of the nut may be embedded in the housing 40.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Manufacturing & Machinery (AREA)
  • Moulds For Moulding Plastics Or The Like (AREA)
  • Injection Moulding Of Plastics Or The Like (AREA)

Abstract

An insert molded article 10 disclosed in the present description is molded by means of a mold 50 which includes a positioning pin 54 protruding from a lower mold 52 toward an upper mold 51. The insert molded article 10 is provided with: a metal fastening member (a nut 30 and a busbar 20) which includes a counterbore part (a lower opening part 33 and a penetration hole part 23) with a bottom opening for inserting the positioning pin 54; and a resin housing 40 integrally molded on an outer surface of the fastening member. The fastening member has a female screw part 34 extending upward from an upper end of the counterbore part. A vertical dimension of the positioning pin 54 is less than or equal to a vertical dimension of the counterbore part.

Description

インサート成形品Insert molding

　本明細書によって開示される技術は、インサート成形品に関する。 The technology disclosed by the present specification relates to an insert-molded article.

　従来、インサートナットを位置決めピンに嵌合させた状態でインサート成形を行うものとして、実開平２－８２５０６号公報（下記特許文献１）に記載の位置決め構造が知られている。下型に彫り込んだ凹部に位置決めピンが設置されており、この位置決めピンにインサートナットが嵌合可能とされている。インサートナットの内部には雌ねじが設けられている。 Conventionally, a positioning structure described in Japanese Utility Model Laid-Open Publication No. 2-82506 (the following Patent Document 1) has been known as a tool for performing insert molding in a state where an insert nut is fitted to a positioning pin. A positioning pin is placed in a recess carved in the lower mold, and an insert nut can be fitted to the positioning pin. An internal thread is provided inside the insert nut.

実開平２－８２５０６号公報Japanese Utility Model Application Publication No. 2-82506

　しかしながら、上記の構造では、インサートナットを位置決めピンに嵌合させた際に、雌ねじが位置決めピンに干渉し、雌ねじが損傷するおそれがある。 However, in the above-mentioned structure, when the insert nut is fitted to the positioning pin, the internal thread may interfere with the positioning pin, and the internal thread may be damaged.

　本明細書によって開示されるインサート成形品は、下型から上型に向けて位置決めピンが突出して設けられた金型によって成形されるインサート成形品であって、前記位置決めピンが挿入される座ぐり部が下方に開口して設けられた金属製の締結部材と、前記締結部材の外面に一体に成形された樹脂製のハウジングとを備え、前記締結部材は前記座ぐり部の上端から上方に連なって設けられた雌ねじ部を備えており、前記位置決めピンの上下寸法は前記座ぐり部の上下寸法以下である構成とした。 The insert molded article disclosed by the present specification is an insert molded article formed by a mold provided with a positioning pin projecting from the lower mold toward the upper mold, and a counterbore in which the positioning pin is inserted. A metal fastening member provided with a portion opened downward, and a resin housing integrally formed on the outer surface of the fastening member, the fastening member continuing upward from the upper end of the counterbore The positioning pin has a vertical dimension equal to or less than the vertical dimension of the counterbore.

　このような構成によると、締結部材を下型にセットした際に、位置決めピンが座ぐり部に下方から進入した状態となるものの、位置決めピンが雌ねじ部に進入しないため、雌ねじ部を構成する内周壁が位置決めピンと干渉することを回避できる。したがって、位置決めピンによって締結部材の位置決めを行いつつ、雌ねじ部を構成する内周壁が位置決めピンによって損傷することを防止できる。 According to such a configuration, when the fastening member is set in the lower mold, although the positioning pin enters the counterbore from below, the positioning pin does not enter the female screw, so the inside of the female screw is configured. Interference of the peripheral wall with the positioning pin can be avoided. Therefore, it is possible to prevent the inner peripheral wall constituting the female screw portion from being damaged by the positioning pin while positioning the fastening member by the positioning pin.

　本明細書によって開示されるインサート成形品は、以下の構成としてもよい。
　前記締結部材は、前記雌ねじ部が設けられたナットと、前記ナットの下端部が載置されたバスバーとを備えて構成され、前記座ぐり部は、前記ナットの下側開口部と、前記バスバーに上下方向に貫通して設けられた貫通孔部とからなる構成としてもよい。
　このような構成によると、ナットとバスバーによって座ぐり部が設けられているから、位置決めピンによってナットとバスバーを同時に位置決めすることができる。 The insert molded article disclosed by the present specification may have the following configuration.
The fastening member includes a nut provided with the female screw portion and a bus bar on which the lower end portion of the nut is placed, and the counterbore includes a lower opening of the nut and the bus bar It is good also as composition which consists of a penetration hole which penetrated and was provided in the up-and-down direction.
According to such a configuration, since the counterbore is provided by the nut and the bus bar, the positioning pin can simultaneously position the nut and the bus bar.

　前記ナットは、前記バスバーと反対側の上端部が閉じた袋状のナットとされ、前記ナットの上端部は、前記ハウジングから外部に露出している構成としてもよい。
　このような構成によると、下型にバスバーとナットをセットして、ナットの上端部に上方から上型を当てることで、ナットとバスバーを上型と下型の間に挟持することができる。したがって、ナットの下端部とバスバーの上面との間に樹脂が浸入することを確実に防ぐことができる。 The nut may be a bag-like nut whose upper end opposite to the bus bar is closed, and the upper end of the nut may be exposed to the outside from the housing.
According to such a configuration, by setting the bus bar and the nut in the lower die and applying the upper die to the upper end portion of the nut from above, the nut and the bus bar can be held between the upper die and the lower die. Therefore, it is possible to reliably prevent resin from infiltrating between the lower end portion of the nut and the upper surface of the bus bar.

　本明細書によって開示されるインサート成形品によれば、位置決めピンによって締結部材の位置決めを行いつつ、雌ねじ部を構成する内周壁が位置決めピンによって損傷することを防止できる。 According to the insert molded article disclosed by the present specification, it is possible to prevent the inner peripheral wall constituting the female screw portion from being damaged by the positioning pin while positioning the fastening member by the positioning pin.

インサート成形品の底面図Bottom view of insert molding 図１におけるＡ－Ａ線断面図AA line sectional view in FIG. 1 下型を示す断面図Cross section showing lower mold 下型にバスバーをセットした状態を示す断面図Sectional view showing a state in which the bus bar is set to the lower mold 下型にナットをセットした状態を示す断面図Sectional view showing a state in which the nut is set to the lower mold ナットとバスバーを上型と下型の間に挟持した後、成形用キャビティに樹脂を注入した状態を示す断面図Sectional drawing which shows the state which inject | poured resin in the cavity for shaping | molding, after pinching a nut and a bus-bar between an upper mold | type and a lower mold | type

　＜実施形態＞
　実施形態を図１から図６の図面を参照しながら説明する。本実施形態のインサート成形品１０は、図１に示すように、複数のバスバー２０と、これらのバスバー２０と一体に成形された樹脂製のハウジング４０とを備えて構成されている。図６に示すように、インサート成形品１０は金型５０によってインサート成形することで形成されている。金型５０は上型５１と下型５２からなり、型閉じ状態における上型５１と下型５２の間に形成される成形用キャビティ５３に溶融樹脂を注入することでハウジング４０が形成されている。また、下型５２の底面には位置決めピン５４が上型５１に向けて上方に突出して設けられている。位置決めピン５４は円柱状をなしている。 Embodiment
Embodiments will be described with reference to the drawings of FIGS. 1 to 6. As shown in FIG. 1, the insert molded article 10 of the present embodiment is configured to include a plurality of bus bars 20 and a resin housing 40 integrally molded with the bus bars 20. As shown in FIG. 6, the insert molded article 10 is formed by insert molding with a mold 50. The mold 50 is composed of an upper mold 51 and a lower mold 52, and the housing 40 is formed by injecting molten resin into a molding cavity 53 formed between the upper mold 51 and the lower mold 52 in the mold closed state. . Further, positioning pins 54 are provided on the bottom surface of the lower mold 52 so as to project upward toward the upper mold 51. The positioning pin 54 has a cylindrical shape.

　バスバー２０は導電性の金属材からなり、全体として板状をなし、下型５２の底面に沿ってセットされる水平部２１を備えている。水平部２１の略中央部には、下型５２の位置決めピン５４が下方から挿通される貫通孔部２３が板厚方向（上下方向）に貫通して設けられている。貫通孔部２３の内径は、位置決めピン５４の直径とほぼ同じかこれよりやや大きめとされている。また、下型５２の底面には、バスバー２０の水平部２１の外形に合わせて下方に凹んだ位置決め凹部５５が設けられている。バスバー２０の水平部２１は、位置決めピン５４を貫通孔部２３に挿通させつつ、位置決め凹部５５に嵌まり込むことによって位置決めされる。 The bus bar 20 is made of a conductive metal material, has a plate-like shape as a whole, and is provided with a horizontal portion 21 set along the bottom surface of the lower mold 52. A through hole 23 through which the positioning pin 54 of the lower die 52 is inserted from below is provided in a substantially central portion of the horizontal portion 21 so as to penetrate in the thickness direction (vertical direction). The inner diameter of the through hole 23 is approximately the same as or slightly larger than the diameter of the positioning pin 54. Further, on the bottom surface of the lower mold 52, a positioning recess 55 recessed downward according to the outer shape of the horizontal portion 21 of the bus bar 20 is provided. The horizontal portion 21 of the bus bar 20 is positioned by being fitted into the positioning recess 55 while inserting the positioning pin 54 into the through hole 23.

　ナット３０は導電性の金属材からなり、全体として袋状をなし、円筒状をなして下方に開口する円筒部３１と、円筒部３１における下側開口部３３とは反対側に位置して円筒部３１の上端開口部を閉じた上端部３２とを備えている。円筒部３１の内部空間のうち下側開口部３３よりも上方には雌ねじ部３４が形成されている。下側開口部３３の直径は、位置決めピン５４の直径とほぼ同じかこれよりやや大きめとされている。また、雌ねじ部３４の内径は、位置決めピン５４の直径よりも小さめとされている。 The nut 30 is made of a conductive metal material, and has a bag-like shape as a whole, and has a cylindrical portion 31 opening downward, and a cylindrical portion 31 located on the opposite side of the lower opening 33 in the cylindrical portion 31 And an upper end portion 32 closing the upper end opening of the portion 31. An internal thread portion 34 is formed above the lower opening 33 in the internal space of the cylindrical portion 31. The diameter of the lower opening 33 is approximately the same as or slightly larger than the diameter of the positioning pin 54. Further, the inner diameter of the female screw portion 34 is smaller than the diameter of the positioning pin 54.

　下側開口部３３と雌ねじ部３４はいずれも円孔形状をなして上下方向に延びる空間であって、雌ねじ部３４は、下側開口部３３の上方に連なって設けられている。雌ねじ部３４の上下寸法は下側開口部３３の上下寸法よりも大きいものとされている。雌ねじ部３４は下側開口部３３と同軸に配置され、雌ねじ部３４の内径は下側開口部３３の内径よりも小さいものとされている。雌ねじ部３４を構成する内周壁には雌ねじが形成されている一方、下側開口部３３を構成する内周壁には雌ねじが形成されていない。なお、下側開口部３３を構成する内周壁と雌ねじ部３４を構成する内周壁とはすり鉢状のテーパ部３５によって連結されており、位置決めピン５４の上端はテーパ部３５の下端に位置している。 The lower opening 33 and the female screw 34 both have a circular hole shape and extend in the vertical direction, and the female screw 34 is continuously provided above the lower opening 33. The upper and lower dimensions of the female screw portion 34 are larger than the upper and lower dimensions of the lower opening 33. The female screw 34 is disposed coaxially with the lower opening 33, and the inner diameter of the female screw 34 is smaller than the inner diameter of the lower opening 33. While an internal thread is formed on the inner peripheral wall constituting the internal thread portion 34, an internal thread is not formed on the inner peripheral wall constituting the lower opening 33. The inner peripheral wall forming the lower opening 33 and the inner peripheral wall forming the female screw portion 34 are connected by a conical taper portion 35, and the upper end of the positioning pin 54 is located at the lower end of the taper portion 35 There is.

　下型５２にバスバー２０とナット３０をセットするには、図５に示すように、まず、バスバー２０を下型５２の底面に載置し、位置決めピン５４と位置決め凹部５５によってバスバー２０の水平部２１を所定の位置に位置決めする。詳細に説明すると、位置決めピン５４が貫通孔部２３に嵌合するとともに、水平部２１が位置決め凹部５５に嵌合することでバスバー２０の水平方向の位置決めが行われる。次に、ナット３０の下端部をバスバー２０の上面に載置する。この状態では、位置決めピン５４が下側開口部３３に嵌合することでナット３０の水平方向の位置決めが行われる。 In order to set the bus bar 20 and the nut 30 in the lower mold 52, first, the bus bar 20 is mounted on the bottom surface of the lower mold 52 as shown in FIG. Position 21 at a predetermined position. Specifically, the positioning pin 54 is fitted in the through hole 23 and the horizontal portion 21 is fitted in the positioning recess 55, whereby the horizontal positioning of the bus bar 20 is performed. Next, the lower end portion of the nut 30 is placed on the upper surface of the bus bar 20. In this state, the positioning pin 54 is engaged with the lower opening 33 to position the nut 30 in the horizontal direction.

　位置決めピン５４は、バスバー２０の貫通孔部２３とナット３０の下側開口部３３とからなる座ぐり部に挿通されているものの、雌ねじ部３４の下方に位置している。すなわち、位置決めピン５４の上下寸法は、座ぐり部（貫通孔部２３と下側開口部３３からなる空間）の上下寸法以下となっているため、雌ねじ部３４のねじ山が位置決めピン５４によって損傷することはない。このとき、貫通孔部２３と下側開口部３３は同軸に配置され、貫通孔部２３を構成する内周壁と下側開口部３３を構成する内周壁とは面一をなして上下方向に連なって配置される。 The positioning pin 54 is inserted into a counterbore formed by the through hole 23 of the bus bar 20 and the lower opening 33 of the nut 30, but is positioned below the female screw 34. That is, since the vertical dimension of positioning pin 54 is equal to or smaller than the vertical dimension of the counterbore (the space formed by through hole 23 and lower opening 33), the thread of female screw portion 34 is damaged by positioning pin 54. There is nothing to do. At this time, the through hole portion 23 and the lower opening portion 33 are coaxially arranged, and the inner peripheral wall forming the through hole portion 23 and the inner peripheral wall forming the lower opening portion 33 are flush with each other in the vertical direction Will be placed.

　次に、上型５１と下型５２を型閉じすると、上型５１の天井面がナット３０の上端部３２に上方から当接し、バスバー２０とナット３０が上型５１と下型５２によって上下方向から挟持された状態となる。これにより、上型５１の天井面と下型５２の底面との間には成形用キャビティ５３が形成される。そして、図６に示すように、成形用キャビティ５３に溶融樹脂を注入し、この溶融樹脂が冷え固まることでハウジング４０が形成される。この後、上型５１と下型５２を型開きしてインサート成形品１０を取り出す。 Next, when the upper mold 51 and the lower mold 52 are closed, the ceiling surface of the upper mold 51 abuts on the upper end 32 of the nut 30 from above, and the bus bar 20 and the nut 30 are vertically moved by the upper mold 51 and the lower mold 52 It is in the state of being pinched from. Thus, a molding cavity 53 is formed between the ceiling surface of the upper mold 51 and the bottom surface of the lower mold 52. Then, as shown in FIG. 6, the molten resin is injected into the molding cavity 53, and the molten resin cools and hardens to form the housing 40. Thereafter, the upper mold 51 and the lower mold 52 are opened and the insert molded product 10 is taken out.

　ところで、ハウジング４０は、バスバー２０とナット３０の外面に一体に成形されており、バスバー２０とナット３０の境界部分を覆うようにして配されている。このため、インサート成形する際にバスバー２０とナット３０の境界部分から溶融樹脂が浸入することが懸念される。しかしながら、上型５１と下型５２によってバスバー２０の上面とナット３０の下端部とが強固に当接しているため、バスバー２０とナット３０の境界部分に溶融樹脂が入り込むことはなく、確実に食い切りを行うことができる。 The housing 40 is integrally formed on the bus bar 20 and the outer surface of the nut 30, and is disposed so as to cover the boundary between the bus bar 20 and the nut 30. For this reason, there is a concern that the molten resin may infiltrate from the boundary between the bus bar 20 and the nut 30 during insert molding. However, since the upper surface of the bus bar 20 and the lower end portion of the nut 30 are in firm contact with each other by the upper mold 51 and the lower mold 52, the molten resin does not enter into the boundary portion between the bus bar 20 and the nut 30. It can be performed.

　以上のように本実施形態では、締結部材（バスバー２０、ナット３０）を下型５２にセットした際に、位置決めピン５４が座ぐり部（貫通孔部２３、下側開口部３３）に下方から進入した状態となるものの、位置決めピン５４が雌ねじ部３４に進入しないため、雌ねじ部３４を構成する内周壁が位置決めピン５４と干渉することを回避できる。したがって、位置決めピン５４によって締結部材の位置決めを行いつつ、雌ねじ部３４を構成する内周壁が位置決めピン５４によって損傷することを防止できる。 As described above, in the present embodiment, when the fastening members (the bus bar 20 and the nut 30) are set in the lower die 52, the positioning pin 54 is in the counterbore (the through hole 23 and the lower opening 33) from below. Since the positioning pin 54 does not enter the internal thread portion 34 although it enters the state, interference of the inner peripheral wall constituting the internal thread portion 34 with the positioning pin 54 can be avoided. Therefore, while positioning of the fastening member is performed by the positioning pin 54, the inner circumferential wall constituting the female screw portion 34 can be prevented from being damaged by the positioning pin 54.

　締結部材は、雌ねじ部３４が設けられたナット３０と、ナット３０の下端部が載置されたバスバー２０とを備えて構成され、座ぐり部は、ナット３０の下側開口部３３と、バスバー２０に上下方向に貫通して設けられた貫通孔部２３とからなる構成としてもよい。
　このような構成によると、ナット３０とバスバー２０によって座ぐり部が設けられているから、位置決めピン５４によってナット３０とバスバー２０を同時に位置決めすることができる。 The fastening member includes a nut 30 provided with a female screw 34 and a bus bar 20 on which the lower end of the nut 30 is placed. The counterbore includes a lower opening 33 of the nut 30, a bus bar 20 may be configured to include a through hole 23 vertically penetrated.
According to such a configuration, since the counterbore portion is provided by the nut 30 and the bus bar 20, the positioning pin 54 can simultaneously position the nut 30 and the bus bar 20.

　ナット３０は、バスバー２０と反対側の上端部３２が閉じた袋状のナットとされ、ナット３０の上端部３２は、ハウジング４０から外部に露出している構成としてもよい。
　このような構成によると、下型５２にバスバー２０とナット３０をセットして、ナット３０の上端部３２に上方から上型５１を当てることで、ナット３０とバスバー２０を上型５１と下型５２の間に挟持することができる。したがって、ナット３０の下端部とバスバー２０の上面との間に樹脂が浸入することを確実に防ぐことができる。 The nut 30 may be a bag-like nut in which the upper end 32 opposite to the bus bar 20 is closed, and the upper end 32 of the nut 30 may be exposed from the housing 40 to the outside.
According to such a configuration, by setting the bus bar 20 and the nut 30 in the lower mold 52 and applying the upper mold 51 to the upper end portion 32 of the nut 30 from above, the nut 30 and the bus bar 20 can be made into the upper mold 51 and the lower mold. It can be held between 52. Therefore, it is possible to reliably prevent resin from entering between the lower end portion of nut 30 and the upper surface of bus bar 20.

　＜他の実施形態＞
　本明細書によって開示される技術は上記記述及び図面によって説明した実施形態に限定されるものではなく、例えば次のような種々の態様も含まれる。
　（１）上記実施形態ではバスバー２０とナット３０によって締結部材が構成されているものの、ナット３０のみを備える締結部材としてもよい。また、ナット３０は袋状のナットである必要はなく、貫通した形状のナットであってもよい。 Other Embodiments
The art disclosed by the present specification is not limited to the embodiments described above with reference to the drawings and the drawings, and includes, for example, various aspects as follows.
(1) Although the fastening member is constituted by the bus bar 20 and the nut 30 in the above embodiment, it may be a fastening member provided with only the nut 30. Also, the nut 30 need not be a bag-like nut, but may be a nut having a penetrating shape.

　（２）上記実施形態では位置決めピン５４と位置決め凹部５５の双方でバスバー２０の位置決めを行っているものの、位置決め凹部５５のみでバスバー２０の位置決めを行ってもよい。この場合、バスバー２０の貫通孔部の直径をナット３０の下側開口部３３の直径よりも大きめに設定してもよい。 (2) Although the bus bar 20 is positioned by both the positioning pin 54 and the positioning recess 55 in the above embodiment, the bus bar 20 may be positioned only by the positioning recess 55. In this case, the diameter of the through hole of the bus bar 20 may be set larger than the diameter of the lower opening 33 of the nut 30.

　（３）上記実施形態ではナット３０の上端部３２がハウジング４０から外部に露出しているものの、ナットの上端部がハウジング４０の内部に埋設されている形態としてもよい。 (3) Although the upper end 32 of the nut 30 is exposed to the outside from the housing 40 in the above embodiment, the upper end of the nut may be embedded in the housing 40.

　１０…インサート成形品
　２０…バスバー
　２３…貫通孔部
　３０…ナット
　３３…下側開口部
　３４…雌ねじ部
　４０…ハウジング
　５０…金型
　５１…上型
　５２…下型
　５４…位置決めピン DESCRIPTION OF SYMBOLS 10 ... Insert molded product 20 ... Bus-bar 23 ... Through-hole part 30 ... Nut 33 ... Lower side opening part 34 ... Female screw part 40 ... Housing 50 ... Mold 51 ... Upper mold 52 ... Lower mold 54 ... Positioning pin

Claims (3)

　下型から上型に向けて位置決めピンが突出して設けられた金型によって成形されるインサート成形品であって、
　前記位置決めピンが挿入される座ぐり部が下方に開口して設けられた金属製の締結部材と、
　前記締結部材の外面に一体に成形された樹脂製のハウジングとを備え、
　前記締結部材は前記座ぐり部の上端から上方に連なって設けられた雌ねじ部を備えており、前記位置決めピンの上下寸法は前記座ぐり部の上下寸法以下であるインサート成形品。 An insert-molded article formed by a mold provided with a positioning pin projecting from a lower mold to an upper mold,
A metal fastening member provided with a counterbore into which the positioning pin is inserted and which opens downward;
And a resin housing integrally formed on an outer surface of the fastening member;
The insert-formed article according to claim 1, wherein the fastening member includes a female screw portion provided continuously from the upper end of the counterbore, and the upper and lower dimensions of the positioning pin are equal to or smaller than the upper and lower dimensions of the counterbore. 　前記締結部材は、前記雌ねじ部が設けられたナットと、前記ナットの下端部が載置されたバスバーとを備えて構成され、
　前記座ぐり部は、前記ナットの下側開口部と、前記バスバーに上下方向に貫通して設けられた貫通孔部とからなる請求項１に記載のインサート成形品。 The fastening member includes a nut provided with the female screw portion, and a bus bar on which the lower end portion of the nut is mounted.
The insert-molded article according to claim 1, wherein the counterbore portion includes a lower opening portion of the nut and a through-hole portion provided in the bus bar in the vertical direction. 　前記ナットは、前記バスバーと反対側の上端部が閉じた袋状のナットとされ、前記ナットの上端部は、前記ハウジングから外部に露出している請求項２に記載のインサート成形品。 The insert-molded article according to claim 2, wherein the nut is a bag-like nut whose upper end opposite to the bus bar is closed, and the upper end of the nut is exposed to the outside from the housing.
PCT/JP2018/030485 2017-08-22 2018-08-17 Insert molded article Ceased WO2019039395A1 (en)

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