JP2020146987A - Insert molding, bottomed cylindrical component, and method for manufacturing insert molding - Google Patents

Insert molding, bottomed cylindrical component, and method for manufacturing insert molding Download PDF

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JP2020146987A
JP2020146987A JP2019048412A JP2019048412A JP2020146987A JP 2020146987 A JP2020146987 A JP 2020146987A JP 2019048412 A JP2019048412 A JP 2019048412A JP 2019048412 A JP2019048412 A JP 2019048412A JP 2020146987 A JP2020146987 A JP 2020146987A
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tubular
pressure receiving
mold
outer peripheral
peripheral surface
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JP7157911B2 (en
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耕至 篠田
Koji Shinoda
耕至 篠田
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Sumitomo Wiring Systems Ltd
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Sumitomo Wiring Systems Ltd
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    • 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
    • B29C45/14311—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 using means for bonding the coating to the 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
    • 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
    • B29C45/14336—Coating a portion of the article, e.g. the edge of the article

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

Abstract

To prevent the occurrence of defective products by insert molding.SOLUTION: An insert molding has a bottomed cylindrical component having a cylindrical portion with only one end closed, a cylindrical holding portion in contact with the outer circumferential surface of the cylindrical portion, and a resin molding portion integrated with the bottomed cylindrical component in a form in which an open end of the cylindrical portion is opened. The cylindrical portion has a form protruding from the outer circumferential surface of the cylindrical portion, and has a pressure receiving portion in contact with the tip end surface of the cylindrical holding portion.SELECTED DRAWING: Figure 1

Description

本開示は、インサート成形品、有底筒状部品及びインサート成形品の製造方法に関するものである。 The present disclosure relates to an insert molded product, a bottomed tubular part, and a method for manufacturing an insert molded product.

特許文献１にはインサート成形品の製造方法の発明が記載されている。インサート成形品は、有底筒状の袋状金属部材をインサート部品として射出成形されるものである。インサート成形では、固定側の金型と可動側金型とが用いられる。固定側の金型には突出パイプ部が形成されている。インサート成形品工程では、突出パイプ部に袋状金属部材の有底孔を嵌合し、有底孔の開口端を固定側の金型によって塞ぐ。そして、固定側の金型と可動側金型を型締めして構成されたキャビティ内に、溶融樹脂が射出される。溶融樹脂が固化すると、袋状金属部材と一体化されたインサート成形品が製造される。 Patent Document 1 describes an invention of a method for producing an insert molded product. The insert-molded product is an injection-molded product using a bottomed tubular bag-shaped metal member as an insert component. In insert molding, a fixed-side mold and a movable-side mold are used. A protruding pipe portion is formed on the mold on the fixed side. In the insert molded product process, the bottomed hole of the bag-shaped metal member is fitted to the protruding pipe portion, and the open end of the bottomed hole is closed by the mold on the fixed side. Then, the molten resin is injected into the cavity formed by molding the fixed-side mold and the movable-side mold. When the molten resin solidifies, an insert molded product integrated with the bag-shaped metal member is manufactured.

特開２００６−３２１０６１号公報Japanese Unexamined Patent Publication No. 2006-321061 特開２０１２−２３２４３０号公報Japanese Unexamined Patent Publication No. 2012-232430 特開２００６−１４２５１３号公報Japanese Unexamined Patent Publication No. 2006-142513 特開平１０−１３８２８５号公報Japanese Unexamined Patent Publication No. 10-138285

固定側の金型と可動側金型を型開きしたときに、袋状金属部材を固定側の金型から離脱できるようにするため、有底孔の内周面と突出パイプ部の外周面との間にはクリアランスを確保する必要がある。しかし、クリアランスを確保すると、袋状金属部材の外周面に対して径方向に作用する射出圧により、袋状金属部材が突出パイプ部に対して傾き、有底孔内の開口端と固定側の金型との間に隙間が生じるおそれがある。有底孔内の開口端と固定側の金型との間に隙間が空くと、溶融樹脂が有底孔内に侵入するため、袋状金属部材が本来の機能を発揮できなくなる。そのため、従来の製造方法では不良品を発生させる可能性がある。 In order to allow the bag-shaped metal member to be separated from the fixed-side mold when the fixed-side mold and the movable-side mold are opened, the inner peripheral surface of the bottomed hole and the outer peripheral surface of the protruding pipe portion It is necessary to secure a clearance between them. However, when the clearance is secured, the bag-shaped metal member is tilted with respect to the protruding pipe portion due to the injection pressure acting in the radial direction on the outer peripheral surface of the bag-shaped metal member, and the open end in the bottomed hole and the fixed side There may be a gap between the mold and the mold. If there is a gap between the open end in the bottomed hole and the mold on the fixed side, the molten resin invades into the bottomed hole, and the bag-shaped metal member cannot perform its original function. Therefore, there is a possibility that defective products may be generated by the conventional manufacturing method.

本開示は、上記のような事情に基づいて完成されたものであって、不良品の発生を防止することを目的とする。 The present disclosure has been completed based on the above circumstances, and an object of the present disclosure is to prevent the occurrence of defective products.

第１の開示のインサート成形品は、
一端部のみが閉塞された筒部を有する有底筒状部品と、
前記筒部の外周面に接触する筒状保持部を有し、前記筒部の開口端を開放させた形態で前記有底筒状部品と一体化された樹脂成形部とを備え、
前記筒部は、前記筒部の外周面から突出した形態であり、前記筒状保持部の先端面に接する受圧部を有している。 The insert molded product of the first disclosure is
A bottomed tubular part having a tubular part with only one end closed,
It has a tubular holding portion that contacts the outer peripheral surface of the tubular portion, and includes a resin molded portion that is integrated with the bottomed tubular component in a form in which the open end of the tubular portion is opened.
The tubular portion has a form protruding from the outer peripheral surface of the tubular portion, and has a pressure receiving portion in contact with the tip surface of the tubular holding portion.

第２の開示の有底筒状部品は、
筒状保持部を有する樹脂成形部と一体化されることでインサート成形品を構成するものであって、
一端部のみが閉塞された形態の筒部を有し、
前記筒部の外周面は、前記筒状保持部の内周面と接触可能であり、
前記筒部の開口端は、前記樹脂成形部と一体化された状態で外部に開放されるようになっており、
前記筒部は、前記筒部の外周面から突出した形態であり、前記筒状保持部の先端面と接触可能な受圧部を有している。 The bottomed tubular part of the second disclosure is
An insert molded product is formed by being integrated with a resin molded portion having a tubular holding portion.
It has a tubular part with only one end closed,
The outer peripheral surface of the tubular portion can come into contact with the inner peripheral surface of the tubular holding portion.
The open end of the tubular portion is open to the outside in a state of being integrated with the resin molded portion.
The tubular portion has a form protruding from the outer peripheral surface of the tubular portion, and has a pressure receiving portion that can come into contact with the tip surface of the tubular holding portion.

第３の開示のインサート成形品の製造方法は、
金型に、一端部のみが閉塞された筒部を有する有底筒状部品をセットし、
前記金型内に溶融樹脂を射出することにより、前記筒部の外周面に接触する筒状保持部を有する樹脂成形部を成形するとともに、前記筒部の開口端を開放させた形態で前記樹脂成形部と前記有底筒状部品とが一体化されたインサート成形品を製造する方法であって、
前記筒部の外周面から、前記筒状保持部の先端面を接触させる受圧部を突出させ、
前記金型に、前記筒状保持部の先端面との間で前記受圧部を挟むことが可能な支持部を形成した上で、
前記受圧部が前記支持部に接触する状態で、前記有底筒状部品を前記金型内にセットし、
射出圧を、前記支持部とは反対側から前記受圧部に付与する。 The third disclosed method for producing an insert molded product is
Set a bottomed tubular part having a tubular part with only one end closed in the mold,
By injecting the molten resin into the mold, a resin molded portion having a tubular holding portion that contacts the outer peripheral surface of the tubular portion is molded, and the resin is formed in a form in which the open end of the tubular portion is opened. It is a method of manufacturing an insert molded product in which a molded portion and the bottomed tubular part are integrated.
A pressure receiving portion that contacts the tip surface of the tubular holding portion is projected from the outer peripheral surface of the tubular portion.
After forming a support portion in the mold capable of sandwiching the pressure receiving portion with the tip surface of the tubular holding portion, the mold is formed.
With the pressure receiving portion in contact with the support portion, the bottomed tubular part is set in the mold.
The injection pressure is applied to the pressure receiving portion from the side opposite to the supporting portion.

第１の開示、第２の開示及び第３の開示によれば、有底筒状部品内への溶融樹脂の侵入に起因する不良品の発生を防止できる。 According to the first disclosure, the second disclosure, and the third disclosure, it is possible to prevent the occurrence of defective products due to the intrusion of the molten resin into the bottomed tubular part.

実施例１のインサート成形品の断面図である。It is sectional drawing of the insert molded article of Example 1. FIG. 実施例１の袋ナット（有底筒状部品）を底面側から視た斜視図である。It is a perspective view which looked at the bag nut (bottomed tubular part) of Example 1 from the bottom side. インサート成形品の使用例をあらわした断面図である。It is sectional drawing which showed the use example of the insert molded article. インサート成形品の製造方法をあらわした断面図である。It is sectional drawing which showed the manufacturing method of the insert molded article. 実施例２の袋ナット（有底筒状部品）を底面側から視た斜視図である。It is a perspective view which saw the bag nut (bottomed tubular part) of Example 2 from the bottom side.

［本開示の実施形態の説明］
最初に本開示の実施形態を列記して説明する。
第１の開示のインサート成形品は、
（１）一端部のみが閉塞された筒部を有する有底筒状部品と、
前記筒部の外周面に接触する筒状保持部を有し、前記筒部の開口端を開放させた形態で前記有底筒状部品と一体化された樹脂成形部とを備え、
前記筒部は、前記筒部の外周面から突出した形態であり、前記筒状保持部の先端面に接する受圧部を有している。 [Explanation of Embodiments of the present disclosure]
First, the embodiments of the present disclosure will be listed and described.
The insert molded product of the first disclosure is
(1) A bottomed tubular part having a tubular portion with only one end closed, and
It has a tubular holding portion that contacts the outer peripheral surface of the tubular portion, and includes a resin molded portion that is integrated with the bottomed tubular component in a form in which the open end of the tubular portion is opened.
The tubular portion has a form protruding from the outer peripheral surface of the tubular portion, and has a pressure receiving portion in contact with the tip surface of the tubular holding portion.

第１の開示の構成によれば、インサート成形によって樹脂成形部と有底筒状部品を一体化させる工程では、筒状保持部を成形するための射出圧が受圧部に作用する。受圧部は筒部の外周面から突出した形態なので、射出圧によって有底筒状部品が金型に押し付けられ、金型内における有底筒状部品の姿勢が安定する。有底筒状部品の姿勢が安定すると、有底筒状部品の開口端と金型との間に隙間が生じないので、有底筒状部品内に溶融樹脂が侵入するおそれがない。したがって、第１の開示のインサート成形品によれば、有底筒状部品内への溶融樹脂の侵入に起因する不良品の発生を防止できる。 According to the configuration of the first disclosure, in the step of integrating the resin molded portion and the bottomed tubular part by insert molding, the injection pressure for molding the tubular holding portion acts on the pressure receiving portion. Since the pressure receiving portion protrudes from the outer peripheral surface of the tubular portion, the bottomed tubular component is pressed against the mold by the injection pressure, and the posture of the bottomed tubular component in the mold is stabilized. When the posture of the bottomed tubular part is stable, there is no gap between the open end of the bottomed tubular part and the mold, so that the molten resin does not invade the bottomed tubular part. Therefore, according to the insert molded product of the first disclosure, it is possible to prevent the generation of defective products due to the intrusion of the molten resin into the bottomed tubular part.

（２）前記受圧部は、前記筒部の軸線方向において、前記筒部の前記開口端よりも前記筒状保持部側の位置に配され、前記筒部のうち前記受圧部よりも前記開口端側の部位が、突起状の環状取付部となっていることが好ましい。この構成によれば、有底筒状部品に他部材を取り付ける場合に、他部材を、受圧部には接触させずに環状取付部の先端面に接触させるようにすれば、他部材における受圧部との対向面を有効活用できる。 (2) The pressure receiving portion is arranged at a position closer to the tubular holding portion than the opening end of the tubular portion in the axial direction of the tubular portion, and the open end of the tubular portion is closer to the pressure receiving portion than the pressure receiving portion. It is preferable that the portion on the side is a protruding annular mounting portion. According to this configuration, when the other member is attached to the bottomed tubular part, if the other member is brought into contact with the tip surface of the annular attachment portion without contacting the pressure receiving portion, the pressure receiving portion in the other member The surface facing with can be effectively used.

（３）前記受圧部の外周面が露出した状態であることが好ましい。この構成によれば、インサート成形の工程で、受圧部の外周面を金型に接触させることができるので、有底筒状部品が径方向に位置決めすることができる。これにより、金型内における有底筒状部品の姿勢が安定する。 (3) It is preferable that the outer peripheral surface of the pressure receiving portion is exposed. According to this configuration, since the outer peripheral surface of the pressure receiving portion can be brought into contact with the mold in the insert molding process, the bottomed tubular part can be positioned in the radial direction. As a result, the posture of the bottomed tubular part in the mold is stabilized.

第２の開示の有底筒状部品は、
（４）筒状保持部を有する樹脂成形部と一体化されることでインサート成形品を構成するものであって、
一端部のみが閉塞された形態の筒部を有し、
前記筒部の外周面は、前記筒状保持部の内周面と接触可能であり、
前記筒部の開口端は、前記樹脂成形部と一体化された状態で外部に開放されるようになっており、
前記筒部は、前記筒部の外周面から突出した形態であり、前記筒状保持部の先端面と接触可能な受圧部を有している。 The bottomed tubular part of the second disclosure is
(4) An insert molded product is formed by being integrated with a resin molded portion having a tubular holding portion.
It has a tubular part with only one end closed,
The outer peripheral surface of the tubular portion can come into contact with the inner peripheral surface of the tubular holding portion.
The open end of the tubular portion is open to the outside in a state of being integrated with the resin molded portion.
The tubular portion has a form protruding from the outer peripheral surface of the tubular portion, and has a pressure receiving portion that can come into contact with the tip surface of the tubular holding portion.

第２の開示の構成によれば、インサート成形によって有底筒状部品を樹脂成形部と一体化させる工程では、受圧部は、筒状保持部を成形するための射出圧を受ける。受圧部は筒部の外周面から突出した形態なので、有底筒状部品は射出圧によって金型に押し付けられ、金型内における有底筒状部品の姿勢が安定する。有底筒状部品の姿勢が安定すると、有底筒状部品の開口端と金型との間に隙間が生じないので、有底筒状部品内に溶融樹脂が侵入するおそれがない。したがって、第２の開示の有底筒状部品によれば、有底筒状部品内への溶融樹脂の侵入に起因する不良品の発生を防止できる。 According to the configuration of the second disclosure, in the step of integrating the bottomed tubular part with the resin molding portion by insert molding, the pressure receiving portion receives an injection pressure for molding the tubular holding portion. Since the pressure receiving portion protrudes from the outer peripheral surface of the tubular portion, the bottomed tubular component is pressed against the mold by the injection pressure, and the posture of the bottomed tubular component in the mold is stabilized. When the posture of the bottomed tubular part is stable, there is no gap between the open end of the bottomed tubular part and the mold, so that the molten resin does not invade the bottomed tubular part. Therefore, according to the bottomed tubular part of the second disclosure, it is possible to prevent the occurrence of defective products due to the intrusion of the molten resin into the bottomed tubular part.

（５）前記受圧部は、前記筒部の軸線方向において、前記筒部の前記開口端よりも閉塞端部側の位置に配され、前記筒部のうち前記受圧部よりも前記開口端側の部位が、突起状の環状取付部となっていることが好ましい。この構成によれば、有底筒状部品に他部材を取り付ける場合に、他部材を、受圧部には接触させずに環状取付部の先端面に接触させるようにすれば、他部材における受圧部との対向面を有効活用できる。 (5) The pressure receiving portion is arranged at a position closer to the closed end portion of the tubular portion than the opening end of the tubular portion in the axial direction of the tubular portion, and the pressure receiving portion of the tubular portion is closer to the opening end side of the pressure receiving portion. It is preferable that the portion is a protruding annular mounting portion. According to this configuration, when the other member is attached to the bottomed tubular part, if the other member is brought into contact with the tip surface of the annular attachment portion without contacting the pressure receiving portion, the pressure receiving portion in the other member The surface facing with can be effectively used.

（６）前記受圧部の外周面が、前記樹脂成形部と一体化された状態で露出可能となっていることが好ましい。この構成によれば、インサート成形の工程で、受圧部の外周面を金型に接触させることができるので、有底筒状部品が径方向に位置決めされる。これにより、金型内における有底筒状部品の姿勢が安定する。 (6) It is preferable that the outer peripheral surface of the pressure receiving portion can be exposed in a state of being integrated with the resin molded portion. According to this configuration, the outer peripheral surface of the pressure receiving portion can be brought into contact with the mold in the insert molding process, so that the bottomed tubular part is positioned in the radial direction. As a result, the posture of the bottomed tubular part in the mold is stabilized.

第３の開示のインサート成形品の製造方法は、
（７）金型に、一端部のみが閉塞された筒部を有する有底筒状部品をセットし、
前記金型内に溶融樹脂を射出することにより、前記筒部の外周面に接触する筒状保持部を有する樹脂成形部を成形するとともに、前記筒部の開口端を開放させた形態で前記樹脂成形部と前記有底筒状部品とが一体化されたインサート成形品を製造する方法であって、
前記筒部の外周面から、前記筒状保持部の先端面を接触させる受圧部を突出させ、
前記金型に、前記筒状保持部の先端面との間で前記受圧部を挟むことが可能な支持部を形成した上で、
前記受圧部が前記支持部に接触する状態で、前記有底筒状部品を前記金型内にセットし、
射出圧を、前記支持部とは反対側から前記受圧部に付与する。 The third disclosed method for producing an insert molded product is
(7) Set a bottomed tubular part having a tubular portion with only one end closed in the mold.
By injecting the molten resin into the mold, a resin molded portion having a tubular holding portion that contacts the outer peripheral surface of the tubular portion is molded, and the resin is formed in a form in which the open end of the tubular portion is opened. It is a method of manufacturing an insert molded product in which a molded portion and the bottomed tubular part are integrated.
A pressure receiving portion that contacts the tip surface of the tubular holding portion is projected from the outer peripheral surface of the tubular portion.
After forming a support portion in the mold capable of sandwiching the pressure receiving portion with the tip surface of the tubular holding portion, the mold is formed.
With the pressure receiving portion in contact with the support portion, the bottomed tubular part is set in the mold.
The injection pressure is applied to the pressure receiving portion from the side opposite to the supporting portion.

第３の開示の構成によれば、インサート成形によって樹脂成形部と有底筒状部品を一体化させる工程では、溶融樹脂の射出圧を、支持部とは反対側から受圧部に付与する。受圧部は筒部の外周面から突出した形態なので、射出圧によって有底筒状部品を金型に押し付け、金型内における有底筒状部品の姿勢を安定させることができる。有底筒状部品の姿勢が安定すると、有底筒状部品の開口端と金型との間に隙間が生じないので、有底筒状部品内に溶融樹脂が侵入するおそれがない。したがって、第３の開示のインサート成形品の製造方法によれば、有底筒状部品内への溶融樹脂の侵入に起因する不良品の発生を防止できる。 According to the configuration of the third disclosure, in the step of integrating the resin molded portion and the bottomed tubular part by insert molding, the injection pressure of the molten resin is applied to the pressure receiving portion from the side opposite to the support portion. Since the pressure receiving portion protrudes from the outer peripheral surface of the tubular portion, the bottomed tubular component can be pressed against the mold by the injection pressure to stabilize the posture of the bottomed tubular component in the mold. When the posture of the bottomed tubular part is stable, there is no gap between the open end of the bottomed tubular part and the mold, so that the molten resin does not invade the bottomed tubular part. Therefore, according to the third disclosed method for manufacturing an insert molded product, it is possible to prevent the occurrence of a defective product due to the intrusion of the molten resin into the bottomed tubular part.

（８）前記受圧部の外周面を前記金型に接触させることが好ましい。この構成によれば、受圧部の外周面を金型に接触させることにより、有底筒状部品を径方向に位置決めすることができる。これにより、キャビティ内における有底筒状部品の姿勢を安定させることができる。 (8) It is preferable that the outer peripheral surface of the pressure receiving portion is brought into contact with the mold. According to this configuration, the bottomed tubular component can be positioned in the radial direction by bringing the outer peripheral surface of the pressure receiving portion into contact with the mold. As a result, the posture of the bottomed tubular part in the cavity can be stabilized.

（９）前記金型に形成した位置決め突起を、前記筒部内に進入させることが好ましい。この構成によれば、位置決め突起を筒部内に進入させることにより、金型内における有底筒状部品の姿勢を安定させることができる。 (9) It is preferable that the positioning protrusion formed on the mold is inserted into the cylinder portion. According to this configuration, the posture of the bottomed tubular component in the mold can be stabilized by allowing the positioning protrusion to enter the tubular portion.

（１０）前記樹脂成形部が、板状基部から前記筒状保持部を突出させた形態であるインサート成形品を製造する方法であって、前記金型のゲートを、前記板状基部の外周縁と対応する位置に設けた上で、前記溶融樹脂を、前記ゲートから前記板状基部の板面に沿って射出することが好ましい。この構成によれば、板状基部の寸法が大きくても、溶融樹脂を金型内に円滑に充填することができる。板状基部用のキャビティ内における溶融樹脂の流動方向は、有底筒状部品の筒部の径方向と平行な方向である。そのため、有底筒状部品が射出圧によって傾くことが懸念される。しかし、筒状保持部用のキャビティ内における溶融樹脂の流動方向は、筒部の軸線方向と平行な向きになるので、受圧部には、金型に押し付けられる向きの射出圧が付与される。 (10) A method of manufacturing an insert molded product in which the resin molded portion projects the tubular holding portion from the plate-shaped base portion, and the gate of the mold is formed on the outer peripheral edge of the plate-shaped base portion. It is preferable to inject the molten resin from the gate along the plate surface of the plate-shaped base portion after providing the molten resin at a position corresponding to the above. According to this configuration, the molten resin can be smoothly filled in the mold even if the size of the plate-shaped base is large. The flow direction of the molten resin in the cavity for the plate-shaped base is a direction parallel to the radial direction of the tubular portion of the bottomed tubular component. Therefore, there is a concern that the bottomed tubular part may be tilted by the injection pressure. However, since the flow direction of the molten resin in the cavity for the tubular holding portion is parallel to the axial direction of the tubular portion, the pressure receiving portion is given an injection pressure in a direction of being pressed against the mold.

［本開示の実施形態の詳細］
［実施例１］
以下、本開示のインサート成形品１０、袋ナット１１及び製造方法を具体化した実施例１を図１〜図４を参照して説明する。本実施例１で開示するインサート成形品１０は、図１に示すように、複数の金属製の袋ナット１１と、金型３０を用いて射出成形された樹脂成形部２１とを備えている。インサート成形品１０は、インサート成形により袋ナット１１と樹脂成形部２１を一体化させたものである。袋ナット１１は、請求項に記載の有底筒状部品に相当する。尚、以下の説明において、上下の方向については、図１，３にあらわれる向きを、そのまま上方、下方と定義する。 [Details of Embodiments of the present disclosure]
[Example 1]
Hereinafter, Example 1 embodying the insert molded product 10, the bag nut 11, and the manufacturing method of the present disclosure will be described with reference to FIGS. 1 to 4. As shown in FIG. 1, the insert molded product 10 disclosed in the first embodiment includes a plurality of metal bag nuts 11 and a resin molded portion 21 injection-molded using a mold 30. The insert molded product 10 is a product in which the bag nut 11 and the resin molded portion 21 are integrated by insert molding. The bag nut 11 corresponds to the bottomed tubular part according to the claim. In the following description, with respect to the vertical direction, the directions appearing in FIGS. 1 and 3 are defined as upward and downward as they are.

袋ナット１１は、樹脂成形部２１と一体化されるのに先立ち、予め製造されたものである。図１，２に示すように、袋ナット１１は、筒部１２と閉塞端部１３と受圧部１７と環状取付部２０とを有する単一部品である。筒部１２は、全体として軸線を上下方向に向けた円筒形をなす。図１に示すように、筒部１２の下端部（上下両端部のうち一方の端部）は、その全領域が閉塞端部１３によって閉塞されている。筒部１２の上端部（上下両端部のうち他方の端部）は、開口端１４となっている。筒部１２の内部空間は、開口端１４において外部へ開放されている。筒部１２の内周面には、筒部１２と同軸状の雌ネジ部１５が形成されている。 The bag nut 11 is manufactured in advance prior to being integrated with the resin molding portion 21. As shown in FIGS. 1 and 2, the bag nut 11 is a single component having a tubular portion 12, a closed end portion 13, a pressure receiving portion 17, and an annular mounting portion 20. The tubular portion 12 has a cylindrical shape with the axis directed in the vertical direction as a whole. As shown in FIG. 1, the entire region of the lower end portion (one end portion of the upper and lower end portions) of the tubular portion 12 is closed by the closed end portion 13. The upper end portion (the other end portion of the upper and lower end portions) of the tubular portion 12 is an open end 14. The internal space of the tubular portion 12 is open to the outside at the opening end 14. A female screw portion 15 coaxial with the tubular portion 12 is formed on the inner peripheral surface of the tubular portion 12.

図２に示すように、筒部１２の軸線方向（上下方向）における中央部には、ローレット加工等により回り止め部１６が形成されている。回り止め部１６を含む筒部１２の外周面には、樹脂成形部２１の筒状保持部２４が密着状態で一体化される。回り止め部１６が筒状保持部２４の内周に食い込んでアンカー効果を発揮することにより、筒部１２（袋ナット１１）と筒状保持部２４（樹脂成形部２１）が離脱規制状態で一体化されている。 As shown in FIG. 2, a detent portion 16 is formed in the central portion of the tubular portion 12 in the axial direction (vertical direction) by knurling or the like. The tubular holding portion 24 of the resin molding portion 21 is integrated in close contact with the outer peripheral surface of the tubular portion 12 including the detent portion 16. The detent portion 16 bites into the inner circumference of the tubular holding portion 24 to exert an anchor effect, so that the tubular portion 12 (bag nut 11) and the tubular holding portion 24 (resin molding portion 21) are integrated in a detachment restricted state. Has been made.

筒部１２の外周面には受圧部１７が一体に形成されている。上下方向（筒部１２の軸線方向）において、受圧部１７は、開口端１４よりも下方であり、且つ回り止め部１６より上方の位置に配されている。受圧部１７は、筒部１２の外径より大径であり、且つ筒部１２と同心状の円板形（フランジ状）をなす。受圧部１７の外面のうち閉塞端部１３側に臨む領域（図１，３における下面及び図４における上面）は、受圧面１８となっている。受圧面１８は、樹脂成形部２１の筒状保持部２４の先端面（図１，３における上端面）が密着状態で一体化されている。 A pressure receiving portion 17 is integrally formed on the outer peripheral surface of the tubular portion 12. In the vertical direction (the axial direction of the tubular portion 12), the pressure receiving portion 17 is arranged at a position below the opening end 14 and above the detent portion 16. The pressure receiving portion 17 has a larger diameter than the outer diameter of the tubular portion 12 and has a disk shape (flange shape) concentric with the tubular portion 12. Of the outer surface of the pressure receiving portion 17, the region facing the closed end portion 13 (the lower surface in FIGS. 1 and 3 and the upper surface in FIG. 4) is the pressure receiving surface 18. The pressure receiving surface 18 is integrated with the tip surface (upper end surface in FIGS. 1 and 3) of the tubular holding portion 24 of the resin molding portion 21 in close contact with each other.

受圧面１８の外面のうち開口端１４側に臨む領域（図１，３における上面及び図４における下面）は、突当面１９となっている。突当面１９は、筒部１２の軸線と直角な平面で構成されている。突当面１９は、インサート成形工程において、金型３０の支持部３８と対向して接触する。筒部１２のうち開口端１４側の端部は、受圧部１７の突当面１９よりも上方（開口端１４側）へ突出した形態の環状取付部２０が形成されている。環状取付部２０は開口端１４を構成している。 Of the outer surface of the pressure receiving surface 18, the region facing the opening end 14 side (upper surface in FIGS. 1 and 3 and lower surface in FIG. 4) is the abutting surface 19. The abutting surface 19 is formed of a plane perpendicular to the axis of the tubular portion 12. The abutting surface 19 faces and contacts the support portion 38 of the mold 30 in the insert molding process. An annular mounting portion 20 is formed at the end of the tubular portion 12 on the opening end 14 side so as to project upward (open end 14 side) from the abutting surface 19 of the pressure receiving portion 17. The annular mounting portion 20 constitutes the open end 14.

図１，３に示すように、樹脂成形部２１は、水平な平板状をなす板状基部２２と、板状基部２２の外周縁から立ち上がった周壁部２３と、複数の筒状保持部２４とを有する単一部材である。筒状保持部２４は、板状基部２２の上面から上方へ突出した形態である。筒状保持部２４は、袋ナット１１（筒部１２）と同軸状の円筒形をなす。筒状保持部２４と袋ナット１１の軸線は、板状基部２２の板面と直角をなす。筒状保持部２４の下端部は板状基部２２によって閉塞された形態である。 As shown in FIGS. 1 and 3, the resin molding portion 21 includes a plate-shaped base portion 22 having a horizontal flat plate shape, a peripheral wall portion 23 rising from the outer peripheral edge of the plate-shaped base portion 22, and a plurality of tubular holding portions 24. It is a single member having. The tubular holding portion 24 has a form protruding upward from the upper surface of the plate-shaped base portion 22. The tubular holding portion 24 has a cylindrical shape coaxial with the bag nut 11 (cylindrical portion 12). The axes of the tubular holding portion 24 and the bag nut 11 form a right angle to the plate surface of the plate-shaped base 22. The lower end of the tubular holding portion 24 is closed by the plate-shaped base portion 22.

筒状保持部２４は、筒状保持部２４の外周面と閉塞端部１３の外面（下面）に接触している。筒状保持部２４の上端面は、受圧部１７の受圧面１８に接触している。筒状保持部２４の外径は受圧部１７の外径と同じ寸法である。したがって、筒状保持部２４の外周面と受圧部１７の外周面は、面一状をなして上下に隣接するように連続している。受圧部１７の外周面と突当面１９と環状取付部２０は、インサート成形品１０の外面に露出した状態である。筒状保持部２４は、受圧部１７よりも下方に位置するので、袋ナット１１の上端の開口端１４はインサート成形品１０の外面に露出している。したがって、樹脂成形部２１を構成する樹脂部位は、筒部１２の内部（雌ネジ孔内）には存在していない。 The tubular holding portion 24 is in contact with the outer peripheral surface of the tubular holding portion 24 and the outer surface (lower surface) of the closed end portion 13. The upper end surface of the tubular holding portion 24 is in contact with the pressure receiving surface 18 of the pressure receiving portion 17. The outer diameter of the tubular holding portion 24 is the same as the outer diameter of the pressure receiving portion 17. Therefore, the outer peripheral surface of the tubular holding portion 24 and the outer peripheral surface of the pressure receiving portion 17 are flush with each other and are continuous so as to be vertically adjacent to each other. The outer peripheral surface, the abutting surface 19, and the annular mounting portion 20 of the pressure receiving portion 17 are exposed to the outer surface of the insert molded product 10. Since the tubular holding portion 24 is located below the pressure receiving portion 17, the open end 14 at the upper end of the bag nut 11 is exposed on the outer surface of the insert molded product 10. Therefore, the resin portion constituting the resin molding portion 21 does not exist inside the tubular portion 12 (inside the female screw hole).

図３に示すように、インサート成形品１０は、回路基板２５及びカバー２６と一体化されることで、車載電子機器２７を構成する。回路基板２５は、インサート成形品１０に対し環状取付部２０の上端面に載置した状態で組み付けられる。回路基板２５に貫通させたビス２８を雌ネジ部１５にねじ込むと、回路基板２５とインサート成形品１０が組み付けられた状態に固定される。回路基板２５とインサート成形品１０を組み付けた後、周壁部２３の上端縁部にはカバー２６が組み付けられる。カバー２６とインサート成形品１０とで構成されたハウジング２９内に、回路基板２５が収容される。 As shown in FIG. 3, the insert molded product 10 is integrated with the circuit board 25 and the cover 26 to form an in-vehicle electronic device 27. The circuit board 25 is assembled to the insert molded product 10 in a state of being placed on the upper end surface of the annular mounting portion 20. When the screw 28 penetrated through the circuit board 25 is screwed into the female screw portion 15, the circuit board 25 and the insert molded product 10 are fixed in an assembled state. After assembling the circuit board 25 and the insert molded product 10, the cover 26 is assembled to the upper end edge of the peripheral wall portion 23. The circuit board 25 is housed in the housing 29 composed of the cover 26 and the insert molded product 10.

図４に示すように、金型３０は、固定側の下型３１と、可動側の上型３２とを備えて構成されている。下型３１の上面は、板状基部２２の内面（図１，３における上面であり、図５における下面）を成形するための第１成形面３３となっている。下型３１の外周面は、周壁部２３の内周面を成形するための第２成形面３４となっている。上型３２の下面には、板状基部２２の外面（図１，３における下面であり、図５における上面）と、周壁部２３の外周面を成形するための第３成形面３５が形成されている。 As shown in FIG. 4, the mold 30 is configured to include a lower mold 31 on the fixed side and an upper mold 32 on the movable side. The upper surface of the lower mold 31 is a first forming surface 33 for forming the inner surface of the plate-shaped base portion 22 (the upper surface in FIGS. 1 and 3 and the lower surface in FIG. 5). The outer peripheral surface of the lower mold 31 is a second forming surface 34 for forming the inner peripheral surface of the peripheral wall portion 23. On the lower surface of the upper mold 32, an outer surface of the plate-shaped base portion 22 (the lower surface in FIGS. 1 and 3 and the upper surface in FIG. 5) and a third forming surface 35 for forming the outer peripheral surface of the peripheral wall portion 23 are formed. ing.

下型３１には、その上面を凹ませた形態の複数の成形凹部３６が形成されている。成形凹部３６は、筒状保持部２４を成形するとともに、筒状保持部２４と袋ナット１１を一体化させるための成形空間として機能する。成形凹部３６の平面視形状は、筒状保持部２４の外径と同じ寸法の円形である。成形凹部３６内には、成形凹部３６の底面から上方へ突出した形態の位置決め突起３７が設けられている。位置決め突起３７は、成形凹部３６と同軸状の円柱形をなす。位置決め突起３７の外径は、雌ネジ部１５の内径と同じ寸法か、それよりも少し小さい寸法である。 The lower mold 31 is formed with a plurality of molding recesses 36 having a concave upper surface thereof. The molding recess 36 functions as a molding space for molding the tubular holding portion 24 and integrating the tubular holding portion 24 and the bag nut 11. The plan-view shape of the molded recess 36 is a circle having the same dimensions as the outer diameter of the tubular holding portion 24. In the molding recess 36, a positioning protrusion 37 is provided so as to project upward from the bottom surface of the molding recess 36. The positioning protrusion 37 has a cylindrical shape coaxial with the molding recess 36. The outer diameter of the positioning protrusion 37 is the same as or slightly smaller than the inner diameter of the female screw portion 15.

成形凹部３６の底面には、成形凹部３６と同心の円形をなす支持部３８が形成されている。支持部３８は、成形凹部３６の底面における外周縁部を、底面の中心部よりも段差状に高くした形態である。支持部３８の上面は、支持面３９となっている。支持面３９は、成形凹部３６及び位置決め突起３７の軸線と直交する平面で構成されている。支持部３８（支持面３９）の外周縁は、成形凹部３６の内周面に対し直角に繋がっている。支持部３８（支持面３９）の内径は、環状取付部２０の外径と同じ寸法である。成形奥部の底面のうち位置決め突起３７と支持部３８との間の領域は、支持面３９より低くなった円環形の位置決め凹部４０となっている。 On the bottom surface of the molding recess 36, a support portion 38 forming a circle concentric with the molding recess 36 is formed. The support portion 38 has a form in which the outer peripheral edge portion on the bottom surface of the molding recess 36 is raised in a stepped shape from the central portion on the bottom surface. The upper surface of the support portion 38 is a support surface 39. The support surface 39 is formed of a plane orthogonal to the axis of the molding recess 36 and the positioning protrusion 37. The outer peripheral edge of the support portion 38 (support surface 39) is connected at a right angle to the inner peripheral surface of the molding recess 36. The inner diameter of the support portion 38 (support surface 39) is the same as the outer diameter of the annular mounting portion 20. The region between the positioning protrusion 37 and the support portion 38 on the bottom surface of the molding back portion is an annular positioning recess 40 that is lower than the support surface 39.

上型３２には、型締め状態の金型３０内に溶融樹脂Ｒを充填するためのゲート４１が設けられている。ゲート４１は、上下方向（成形凹部３６の軸線方向）においては、板状基部２２と対応する高さに配されている。ゲート４１は、水平面上においては、板状基部２２の外周縁に隣接する位置に配されている。ゲート４１は、板状基部２２の板面に沿って水平方向に溶融樹脂Ｒを射出する。ゲート４１からの射出方向は、袋ナット１１の筒部１２の軸線と直角な方向である。 The upper mold 32 is provided with a gate 41 for filling the molten resin R in the mold 30 in the mold-tightened state. The gate 41 is arranged at a height corresponding to the plate-shaped base portion 22 in the vertical direction (the axial direction of the molding recess 36). The gate 41 is arranged at a position adjacent to the outer peripheral edge of the plate-shaped base 22 on the horizontal plane. The gate 41 injects the molten resin R in the horizontal direction along the plate surface of the plate-shaped base 22. The injection direction from the gate 41 is a direction perpendicular to the axis of the tubular portion 12 of the bag nut 11.

次に、インサート成形の製造方法を説明する。まず、袋ナット１１を、図１，３とは上下反転した姿勢で下型３１り成形凹部３６内にセットする。セットした状態では、筒部１２が位置決め突起３７に外嵌され、雌ネジ部１５の内周が位置決め突起３７の外周に接触し、受圧部１７の外周面の全領域が成形凹部３６の内周面に接触する。これらの接触により、袋ナット１１が下型３１に対し水平方向（袋ナット１１の軸線と直角な方向）に位置決めされる。突当面１９が、その全周にわたり、支持面３９に対して筒部１２の軸線方向に突き当たる。環状取付部２０は位置決め凹部４０に嵌入する。 Next, a manufacturing method of insert molding will be described. First, the bag nut 11 is set in the lower mold 31 molding recess 36 in a posture that is upside down from FIGS. 1 and 3. In the set state, the tubular portion 12 is fitted onto the positioning protrusion 37, the inner circumference of the female screw portion 15 contacts the outer circumference of the positioning protrusion 37, and the entire area of the outer peripheral surface of the pressure receiving portion 17 is the inner circumference of the molding recess 36. Contact the surface. By these contacts, the bag nut 11 is positioned in the horizontal direction (direction perpendicular to the axis of the bag nut 11) with respect to the lower mold 31. The abutting surface 19 abuts on the support surface 39 in the axial direction of the tubular portion 12 over the entire circumference thereof. The annular mounting portion 20 fits into the positioning recess 40.

成形凹部３６に袋ナット１１をセットした状態では、成形凹部３６の内周面と袋ナット１１の筒部１２の外周面との間に、筒状保持部２４用のキャビティ４２が形成される。このキャビティ４２は、筒部１２の軸線方向と同軸状の円筒形である。したがって、このキャビティ４２内に流入した溶融樹脂Ｒも、受圧部１７（受圧面１８）に向かって筒部１２の軸線方向と平行に流れる。 When the bag nut 11 is set in the molding recess 36, the cavity 42 for the tubular holding portion 24 is formed between the inner peripheral surface of the molding recess 36 and the outer peripheral surface of the tubular portion 12 of the bag nut 11. The cavity 42 has a cylindrical shape coaxial with the axial direction of the tubular portion 12. Therefore, the molten resin R that has flowed into the cavity 42 also flows toward the pressure receiving portion 17 (pressure receiving surface 18) in parallel with the axial direction of the tubular portion 12.

袋ナット１１を下型３１にセットした後、下型３１の上に上型３２を被せることにより、金型３０を型締めする。型締め状態では、第１成形面３３と第３成形面３５との間に板状基部２２用のキャビティ４３が形成され、第２成形面３４と第３成形面３５との間に周壁部２３を成形するためのキャビティ４４が形成される。筒状保持部２４を成形するためのキャビティ４２は、板状基部２２を成形するためのキャビティ４３と連通する。 After setting the bag nut 11 on the lower mold 31, the upper mold 32 is put on the lower mold 31 to fasten the mold 30. In the mold-fastened state, a cavity 43 for the plate-shaped base 22 is formed between the first molding surface 33 and the third molding surface 35, and the peripheral wall portion 23 is formed between the second molding surface 34 and the third molding surface 35. Cavity 44 for molding is formed. The cavity 42 for forming the tubular holding portion 24 communicates with the cavity 43 for forming the plate-shaped base portion 22.

型締めした後、ゲート４１から上記キャビティ４２，４３，４４内に溶融樹脂Ｒが射出される。筒状保持部２４用のキャビティ４２内では、溶融樹脂Ｒの射出圧が、筒部１２（袋ナット１１）の軸線方向と平行に受圧面１８に付与される。受圧面１８に対する射出圧は、受圧面１８に対し全周にわたって均一に付与されるので、袋ナット１１の突当面１９は、金型３０の支持面３９に対し全周にわたって均一に押し付けられる。この全周にわたる均一な押圧力により、袋ナット１１は金型３０に対し傾くことなく適正な姿勢に保持される。また、筒部１２が位置決め突起３７に外嵌されることによっても、金型３０に対する袋ナット１１の姿勢の傾きが規制されている。 After molding, the molten resin R is injected into the cavities 42, 43, 44 from the gate 41. In the cavity 42 for the tubular holding portion 24, the injection pressure of the molten resin R is applied to the pressure receiving surface 18 parallel to the axial direction of the tubular portion 12 (bag nut 11). Since the injection pressure with respect to the pressure receiving surface 18 is uniformly applied to the pressure receiving surface 18 over the entire circumference, the abutting surface 19 of the bag nut 11 is uniformly pressed against the support surface 39 of the mold 30 over the entire circumference. Due to the uniform pressing force over the entire circumference, the bag nut 11 is held in an appropriate posture without tilting with respect to the mold 30. Further, the inclination of the posture of the bag nut 11 with respect to the mold 30 is also regulated by the tubular portion 12 being fitted onto the positioning protrusion 37.

本実施例１のインサート成形品１０は、一端部のみが閉塞された筒部１２を有する袋ナット１１（有底筒状部品）と、樹脂成形部２１とをインサート成形により一体化したものである。つまり、袋ナット１１は、樹脂成形部２１と一体化されることでインサート成形品１０を構成するものである。樹脂成形部２１は、筒部１２の外周面に接触する筒状保持部２４を有する。樹脂成形部２１と袋ナット１１が一体化された状態では、筒部１２の開口端１４と筒部１２内の雌ネジ部１５が、インサート成形品１０の外部へ開放された形態となる。筒部１２は、筒部１２の外周面から突出した形態の受圧部１７を有する。受圧部１７の受圧面１８は、筒状保持部２４の先端面に接している。 In the insert molded product 10 of the first embodiment, a bag nut 11 (bottomed tubular part) having a tubular portion 12 in which only one end is closed and a resin molded portion 21 are integrated by insert molding. .. That is, the bag nut 11 constitutes the insert molded product 10 by being integrated with the resin molded portion 21. The resin molding portion 21 has a tubular holding portion 24 that contacts the outer peripheral surface of the tubular portion 12. In the state where the resin molded portion 21 and the bag nut 11 are integrated, the open end 14 of the tubular portion 12 and the female screw portion 15 in the tubular portion 12 are opened to the outside of the insert molded product 10. The tubular portion 12 has a pressure receiving portion 17 protruding from the outer peripheral surface of the tubular portion 12. The pressure receiving surface 18 of the pressure receiving portion 17 is in contact with the tip surface of the tubular holding portion 24.

インサート成形によって樹脂成形部２１と袋ナット１１を一体化させる工程では、筒状保持部２４を成形するための溶融樹脂Ｒの射出圧が、受圧部１７に対し袋ナット１１（筒部１２）の軸線方向と平行に作用する。受圧部１７は筒部１２の外周面から突出した形態なので、射出圧によって袋ナット１１が金型３０に押し付けられ、金型３０内における袋ナット１１の姿勢が安定する。袋ナット１１の姿勢が安定すると、袋ナット１１の開口端１４（環状取付部２０の先端面）と金型３０の位置決め凹部４０の底面との間に隙間が生じないので、袋ナット１１内に溶融樹脂Ｒが侵入するおそれがない。したがって、本実施例１のインサート成形品１０によれば、袋ナット１１内への溶融樹脂Ｒの侵入に起因する不良品の発生を防止できる。 In the step of integrating the resin molding portion 21 and the bag nut 11 by insert molding, the injection pressure of the molten resin R for molding the tubular holding portion 24 is applied to the pressure receiving portion 17 of the bag nut 11 (cylinder portion 12). It acts parallel to the axial direction. Since the pressure receiving portion 17 protrudes from the outer peripheral surface of the tubular portion 12, the bag nut 11 is pressed against the mold 30 by the injection pressure, and the posture of the bag nut 11 in the mold 30 is stabilized. When the posture of the bag nut 11 is stable, there is no gap between the open end 14 of the bag nut 11 (the tip surface of the annular mounting portion 20) and the bottom surface of the positioning recess 40 of the mold 30, so that the bag nut 11 is inside the bag nut 11. There is no risk of the molten resin R invading. Therefore, according to the insert molded product 10 of the first embodiment, it is possible to prevent the generation of defective products due to the intrusion of the molten resin R into the bag nut 11.

受圧部１７は、筒部１２の軸線方向において、筒部１２の開口端１４よりも筒状保持部２４側（閉塞端部１３側）の位置に配されている。筒部１２のうち受圧部１７よりも開口端１４側の部位が、突起状の環状取付部２０となっている。袋ナット１１に回路基板２５（他部材）を取り付ける場合に、回路基板２５を、受圧部１７には接触させず、環状取付部２０の先端面に接触させている。これにより、回路基板２５のうち受圧部１７との対向面（図３における下面）を、プリント回路を配置したりするために有効活用できる。 The pressure receiving portion 17 is arranged at a position closer to the tubular holding portion 24 (closed end portion 13 side) than the opening end 14 of the tubular portion 12 in the axial direction of the tubular portion 12. The portion of the tubular portion 12 on the opening end 14 side of the pressure receiving portion 17 is a protruding annular mounting portion 20. When the circuit board 25 (other member) is attached to the bag nut 11, the circuit board 25 is not brought into contact with the pressure receiving portion 17, but is brought into contact with the tip surface of the annular mounting portion 20. As a result, the surface of the circuit board 25 facing the pressure receiving portion 17 (lower surface in FIG. 3) can be effectively used for arranging the printed circuit.

受圧部１７の外周面は、インサート成形品１０の外面に露出した状態となっている。インサート成形の工程では、受圧部１７の外周面を金型３０に接触させることができるので、袋ナット１１を径方向に位置決めすることができる。これにより、金型３０内における袋ナット１１の姿勢が安定する。 The outer peripheral surface of the pressure receiving portion 17 is exposed to the outer surface of the insert molded product 10. In the insert molding process, the outer peripheral surface of the pressure receiving portion 17 can be brought into contact with the mold 30, so that the bag nut 11 can be positioned in the radial direction. As a result, the posture of the bag nut 11 in the mold 30 is stabilized.

インサート成形品１０の製造は、金型３０に、一端部のみが閉塞された筒部１２を有する袋ナット１１をセットし、金型３０内に溶融樹脂Ｒを射出する。溶融樹脂Ｒの射出により、筒部１２の外周面に接触する筒状保持部２４を有する樹脂成形部２１を成形するとともに、筒部１２の開口端１４を開放させた形態で樹脂成形部２１と袋ナット１１とを一体化させる。本実施例１の製造方法においては、筒部１２の外周面から、筒状保持部２４の先端面を接触させる受圧部１７を突出させている。金型３０には、筒状保持部２４の先端面との間で受圧部１７を挟むことが可能な支持部３８を形成している。その上で、受圧部１７が支持部３８に接触する状態で、袋ナット１１を金型３０内にセットし、筒状保持部２４を成型するための溶融樹脂Ｒの射出圧を、支持部３８とは反対側から受圧部１７に付与するようにしている。 In the production of the insert molded product 10, a bag nut 11 having a tubular portion 12 having only one end closed is set in the mold 30, and the molten resin R is injected into the mold 30. By injecting the molten resin R, the resin molded portion 21 having the tubular holding portion 24 in contact with the outer peripheral surface of the tubular portion 12 is molded, and the open end 14 of the tubular portion 12 is opened to form the resin molded portion 21. Integrate with the bag nut 11. In the manufacturing method of the first embodiment, the pressure receiving portion 17 that contacts the tip surface of the tubular holding portion 24 is projected from the outer peripheral surface of the tubular portion 12. The mold 30 is formed with a support portion 38 capable of sandwiching the pressure receiving portion 17 with the tip surface of the tubular holding portion 24. Then, with the pressure receiving portion 17 in contact with the supporting portion 38, the bag nut 11 is set in the mold 30, and the injection pressure of the molten resin R for molding the tubular holding portion 24 is applied to the supporting portion 38. It is applied to the pressure receiving portion 17 from the opposite side.

この製造方法によれば、受圧部１７が筒部１２の外周面から突出した形態なので、支持部３８とは反対側から受圧部１７に付与する射出圧により、袋ナット１１を金型３０に押し付けることができる。これにより、金型３０内における袋ナット１１の姿勢を安定させることができる。さらに、金型３０の位置決め突起３７を筒部１２内に進入させることによっても、金型３０内における袋ナット１１の姿勢を安定させることができる。袋ナット１１の姿勢が安定すると、袋ナット１１の開口端１４と金型３０との間に隙間が生じないので、袋ナット１１の内部（雌ネジ部１５内）に溶融樹脂Ｒが侵入するおそれがない。したがって、本実施例１の製造方法によれば、袋ナット１１内への溶融樹脂Ｒの侵入に起因する不良品の発生を防止できる。 According to this manufacturing method, since the pressure receiving portion 17 protrudes from the outer peripheral surface of the tubular portion 12, the bag nut 11 is pressed against the mold 30 by the injection pressure applied to the pressure receiving portion 17 from the side opposite to the support portion 38. be able to. As a result, the posture of the bag nut 11 in the mold 30 can be stabilized. Further, the posture of the bag nut 11 in the mold 30 can be stabilized by inserting the positioning protrusion 37 of the mold 30 into the cylinder portion 12. When the posture of the bag nut 11 is stable, there is no gap between the open end 14 of the bag nut 11 and the mold 30, so that the molten resin R may invade the inside of the bag nut 11 (inside the female screw portion 15). There is no. Therefore, according to the manufacturing method of the first embodiment, it is possible to prevent the generation of defective products due to the intrusion of the molten resin R into the bag nut 11.

樹脂成形部２１は、板状基部２２から筒状保持部２４を突出させた形態である。金型３０のゲート４１は、板状基部２２の外周縁と対応する位置に設けられ、溶融樹脂Ｒを、ゲート４１から板状基部２２の板面に沿って(板面と平行に）射出するようになっている。この構成によれば、板状基部２２の寸法が大きくても、溶融樹脂Ｒを金型３０内に円滑に充填することができる。板状基部２２用のキャビティ４３内における溶融樹脂Ｒの流動方向は、袋ナット１１の筒部１２の径方向と平行な方向である。そのため、袋ナット１１が射出圧によって傾くことが懸念される。しかし、筒状保持部２４用のキャビティ４２内における溶融樹脂Ｒの流動方向は、筒部１２の軸線方向と平行な向きになるので、受圧部１７には、金型３０に押し付けられる向きの射出圧が付与される。 The resin molding portion 21 has a form in which the tubular holding portion 24 is projected from the plate-shaped base portion 22. The gate 41 of the mold 30 is provided at a position corresponding to the outer peripheral edge of the plate-shaped base portion 22, and the molten resin R is injected from the gate 41 along the plate surface of the plate-shaped base portion 22 (parallel to the plate surface). It has become like. According to this configuration, the molten resin R can be smoothly filled in the mold 30 even if the size of the plate-shaped base 22 is large. The flow direction of the molten resin R in the cavity 43 for the plate-shaped base portion 22 is a direction parallel to the radial direction of the tubular portion 12 of the bag nut 11. Therefore, there is a concern that the bag nut 11 may be tilted due to the injection pressure. However, since the flow direction of the molten resin R in the cavity 42 for the tubular holding portion 24 is parallel to the axial direction of the tubular portion 12, the pressure receiving portion 17 is injected in the direction of being pressed against the mold 30. Pressure is applied.

［実施例２］
本開示を具体化した実施例２を、図５を参照して説明する。本実施例２は、袋ナット５０（有底筒状部品）を上記実施例１とは異なる構成としたものである。その他の構成については上記実施例１と同じであるため、同じ構成については、同一符号を付し、構造、作用及び効果の説明は省略する。 [Example 2]
Example 2 embodying the present disclosure will be described with reference to FIG. In the second embodiment, the bag nut 50 (bottomed tubular part) has a configuration different from that of the first embodiment. Since other configurations are the same as those in the first embodiment, the same configurations are designated by the same reference numerals, and the description of the structure, action, and effect will be omitted.

上記実施例１の袋ナット１１は、１つの受圧部１７が筒部１２の外周から全周にわたって張り出した形態であるのに対し、本実施例２の袋ナット５０は、複数（例えば、４つ）の受圧部５２が、筒部５１の外周面のうち周方向に間隔を空けた複数位置から突出した形態である。筒部５１の外周には回り止め部５３が形成されている。受圧部５２の受圧面５４には、樹脂成形部（図示省略）の筒状保持部（図示省略）の先端面が密着する。また、実施例２の袋ナット５０を用いたインサート成形（図示省略）を成形するための金型（図示省略）は、実施例１のものと同じ構造である。周方向に隣り合う受圧部５２の間に筒状保持部の先端部が入り込む。 The bag nut 11 of the first embodiment has a form in which one pressure receiving portion 17 projects from the outer circumference of the tubular portion 12 over the entire circumference, whereas the bag nut 50 of the second embodiment has a plurality (for example, four). ), The pressure receiving portion 52 protrudes from a plurality of positions on the outer peripheral surface of the tubular portion 51 at intervals in the circumferential direction. A detent portion 53 is formed on the outer circumference of the tubular portion 51. The tip surface of the tubular holding portion (not shown) of the resin molding portion (not shown) is in close contact with the pressure receiving surface 54 of the pressure receiving portion 52. Further, the mold (not shown) for molding the insert molding (not shown) using the bag nut 50 of the second embodiment has the same structure as that of the first embodiment. The tip of the tubular holding portion is inserted between the pressure receiving portions 52 adjacent to each other in the circumferential direction.

実施例２においても、実施例１と同様、インサート成形によって樹脂成形部と袋ナット５０を一体化させる工程では、筒状保持部を成形するための溶融樹脂Ｒの射出圧が、複数の受圧部５２に対し袋ナット５０（筒部５１）の軸線方向と平行に作用する。複数の受圧部５２は、筒部５１の外周面のうち周方向に間隔を空けた複数箇所から突出した形態なので、射出圧によって袋ナット５０が金型に押し付けられ、金型内における袋ナット５０の姿勢が安定する。 In the second embodiment as well, in the step of integrating the resin molding portion and the bag nut 50 by insert molding, the injection pressure of the molten resin R for molding the tubular holding portion is a plurality of pressure receiving portions as in the first embodiment. It acts parallel to the axial direction of the bag nut 50 (cylinder portion 51) with respect to 52. Since the plurality of pressure receiving portions 52 project from a plurality of locations on the outer peripheral surface of the tubular portion 51 at intervals in the circumferential direction, the bag nut 50 is pressed against the mold by the injection pressure, and the bag nut 50 in the mold The posture is stable.

［他の実施例］
本発明は、上記記述及び図面によって説明した実施例に限定されるものではなく、特許請求の範囲によって示される。本発明には、特許請求の範囲と均等の意味及び特許請求の範囲内でのすべての変更が含まれ、下記のような実施形態も含まれることが意図される。
上記実施例１，２では、受圧部の受圧面が、筒部の軸線と直角な平面で構成されているが、受圧面は、筒部の軸線に対して傾斜した平面や、曲面で構成してもよい。受圧面に、筒状保持部に食い込む突起を形成してもよい。
上記実施例１，２では、受圧部の突当面が、筒部の軸線と直角な平面で構成されているが、突当面は、筒部の軸線に対して傾斜した平面や、曲面で構成してもよい。
上記実施例１，２では、受圧部を、筒部の開口端よりも筒状保持部側（閉塞端部側）の位置に配し、筒部の開口端側の端部に突起状取付部を形成したが、受圧部を筒部の開口端に配し、受圧部の端面と筒部の開口端面とが面一状に連続するようにしてもよい。
上記実施例１，２では、金型に位置決め突起を設けたが、金型は位置決め突起を有しない形態であってもよい。
上記実施例１，２では、有底筒状部品と樹脂成形部を一体化させた状態において、受圧部の外周面の全領域が露出するようにしたが、受圧部の外周面の一部又は全領域が樹脂成形部で覆われるようにしてもよい。
上記実施例１，２では、金型のゲートを、板状基部の外周縁と対応する位置に設け、溶融樹脂がゲートから板状基部の板面に沿って射出されるようにしたが、ゲートを筒部の閉塞端部と対向するように配置し、溶融樹脂がゲートから閉塞端部の外面に向かって射出するようにしてもよい。
上記実施例１，２では、有底筒状部品が、内周に雌ネジ部が形成された袋ナットであるが、有底筒状部品は袋ナット以外の部品であってもよい。
上記実施例１，２では、有底筒状部品に回路基板が取り付けられるようになっているが、有底筒状部品の取付け対象は回路基板以外の部品でもよい。 [Other Examples]
The present invention is not limited to the examples described in the above description and drawings, but is shown by the scope of claims. The present invention includes the meaning equivalent to the scope of claims and all modifications within the scope of claims, and is intended to include the following embodiments.
In the first and second embodiments, the pressure receiving surface of the pressure receiving portion is formed of a plane perpendicular to the axis of the cylinder portion, but the pressure receiving surface is formed of a plane inclined with respect to the axis of the cylinder portion or a curved surface. You may. A protrusion that bites into the tubular holding portion may be formed on the pressure receiving surface.
In the first and second embodiments, the abutting surface of the pressure receiving portion is formed of a plane perpendicular to the axis of the cylinder portion, but the abutting surface is formed of a plane inclined with respect to the axis of the cylinder portion or a curved surface. You may.
In the first and second embodiments, the pressure receiving portion is arranged at a position closer to the tubular holding portion side (closed end portion side) than the opening end of the tubular portion, and a protruding mounting portion is provided at the end of the tubular portion on the open end side. However, the pressure receiving portion may be arranged at the open end of the tubular portion so that the end surface of the pressure receiving portion and the open end surface of the tubular portion are flush with each other.
In the first and second embodiments, the mold is provided with the positioning protrusion, but the mold may not have the positioning protrusion.
In Examples 1 and 2 above, in a state where the bottomed tubular part and the resin molded portion are integrated, the entire region of the outer peripheral surface of the pressure receiving portion is exposed, but a part of the outer peripheral surface of the pressure receiving portion or The entire region may be covered with the resin molded portion.
In Examples 1 and 2 above, the gate of the mold is provided at a position corresponding to the outer peripheral edge of the plate-shaped base so that the molten resin is injected from the gate along the plate surface of the plate-shaped base. May be arranged so as to face the closed end portion of the tubular portion so that the molten resin is ejected from the gate toward the outer surface of the closed end portion.
In Examples 1 and 2 above, the bottomed tubular part is a bag nut having a female threaded portion formed on the inner circumference, but the bottomed tubular part may be a part other than the bag nut.
In the first and second embodiments, the circuit board is attached to the bottomed tubular component, but the bottomed tubular component may be attached to a component other than the circuit board.

１０：インサート成形品
１１、５０：袋ナット（有底筒状部品）
１２、５１：筒部
１３：閉塞端部
１４：開口端
１５：雌ネジ部
１６、５３：回り止め部
１７、５２：受圧部
１８、５４：受圧面
１９：突当面
２０：環状取付部
２１：樹脂成形部
２２：板状基部
２３：周壁部
２４：筒状保持部
２５：回路基板
２６：カバー
２７：車載電子機器
２８：ビス
２９：ハウジング
３０：金型
３１：下型
３２：上型
３３：第１成形面
３４：第２成形面
３５：第３成形面
３６：成形凹部
３７：位置決め突起
３８：支持部
３９：支持面
４０：位置決め凹部
４１：ゲート
４２：キャビティ
４３：キャビティ
４４：キャビティ
Ｒ：溶融樹脂 10: Insert molded products 11, 50: Bag nuts (bottomed tubular parts)
12, 51: Cylinder part 13: Closed end part 14: Opening end 15: Female screw part 16, 53: Anti-rotation part 17, 52: Pressure receiving part 18, 54: Pressure receiving surface 19: Lump surface 20: Circular mounting part 21: Resin molding part 22: Plate-shaped base part 23: Peripheral wall part 24: Cylindrical holding part 25: Circuit board 26: Cover 27: In-vehicle electronic device 28: Screw 29: Housing 30: Mold 31: Lower mold 32: Upper mold 33: 1st molding surface 34: 2nd molding surface 35: 3rd molding surface 36: Molding recess 37: Positioning protrusion 38: Support portion 39: Support surface 40: Positioning recess 41: Gate 42: Cavity 43: Cavity 44: Cavity R: Molten resin

Claims (10)

一端部のみが閉塞された筒部を有する有底筒状部品と、
前記筒部の外周面に接触する筒状保持部を有し、前記筒部の開口端を開放させた形態で前記有底筒状部品と一体化された樹脂成形部とを備え、
前記筒部は、前記筒部の外周面から突出した形態であり、前記筒状保持部の先端面に接する受圧部を有しているインサート成形品。 A bottomed tubular part having a tubular part with only one end closed,
It has a tubular holding portion that contacts the outer peripheral surface of the tubular portion, and includes a resin molded portion that is integrated with the bottomed tubular component in a form in which the open end of the tubular portion is opened.
The tubular portion is an insert molded product having a shape protruding from the outer peripheral surface of the tubular portion and having a pressure receiving portion in contact with the tip surface of the tubular holding portion. 前記受圧部は、前記筒部の軸線方向において、前記筒部の前記開口端よりも前記筒状保持部側の位置に配され、
前記筒部のうち前記受圧部よりも前記開口端側の部位が、突起状の環状取付部となっている請求項１に記載のインサート成形品。 The pressure receiving portion is arranged at a position closer to the tubular holding portion than the opening end of the tubular portion in the axial direction of the tubular portion.
The insert molded product according to claim 1, wherein a portion of the tubular portion on the opening end side of the pressure receiving portion is a protruding annular mounting portion. 前記受圧部の外周面が露出した状態である請求項１又は請求項２に記載のインサート成形品。 The insert molded product according to claim 1 or 2, wherein the outer peripheral surface of the pressure receiving portion is exposed. 筒状保持部を有する樹脂成形部と一体化されることでインサート成形品を構成するものであって、
一端部のみが閉塞された形態の筒部を有し、
前記筒部の外周面は、前記筒状保持部の内周面と接触可能であり、
前記筒部の開口端は、前記樹脂成形部と一体化された状態で外部に開放されるようになっており、
前記筒部は、前記筒部の外周面から突出した形態であり、前記筒状保持部の先端面と接触可能な受圧部を有している有底筒状部品。 An insert molded product is formed by being integrated with a resin molded portion having a tubular holding portion.
It has a tubular part with only one end closed,
The outer peripheral surface of the tubular portion can come into contact with the inner peripheral surface of the tubular holding portion.
The open end of the tubular portion is open to the outside in a state of being integrated with the resin molded portion.
The tubular portion is a bottomed tubular component having a shape protruding from the outer peripheral surface of the tubular portion and having a pressure receiving portion that can come into contact with the tip surface of the tubular holding portion. 前記受圧部は、前記筒部の軸線方向において、前記筒部の前記開口端よりも閉塞端部側の位置に配され、
前記筒部のうち前記受圧部よりも前記開口端側の部位が、突起状の環状取付部となっている請求項４に記載の有底筒状部品。 The pressure receiving portion is arranged at a position closer to the closed end portion than the opening end of the tubular portion in the axial direction of the tubular portion.
The bottomed tubular component according to claim 4, wherein a portion of the tubular portion on the opening end side of the pressure receiving portion is a protruding annular mounting portion. 前記受圧部の外周面が、前記樹脂成形部と一体化された状態で露出可能となっている請求項４又は請求項５に記載の有底筒状部品。 The bottomed tubular component according to claim 4 or 5, wherein the outer peripheral surface of the pressure receiving portion can be exposed in a state of being integrated with the resin molded portion. 金型に、一端部のみが閉塞された筒部を有する有底筒状部品をセットし、
前記金型内に溶融樹脂を射出することにより、前記筒部の外周面に接触する筒状保持部を有する樹脂成形部を成形するとともに、前記筒部の開口端を開放させた形態で前記樹脂成形部と前記有底筒状部品とが一体化されたインサート成形品を製造する方法であって、
前記筒部の外周面から、前記筒状保持部の先端面を接触させる受圧部を突出させ、
前記金型に、前記筒状保持部の先端面との間で前記受圧部を挟むことが可能な支持部を形成した上で、
前記受圧部が前記支持部に接触する状態で、前記有底筒状部品を前記金型内にセットし、
射出圧を、前記支持部とは反対側から前記受圧部に付与するインサート成形品の製造方法。 Set a bottomed tubular part having a tubular part with only one end closed in the mold,
By injecting the molten resin into the mold, a resin molded portion having a tubular holding portion that comes into contact with the outer peripheral surface of the tubular portion is molded, and the resin is formed by opening the open end of the tubular portion. It is a method of manufacturing an insert molded product in which a molded portion and the bottomed tubular part are integrated.
A pressure receiving portion that contacts the tip surface of the tubular holding portion is projected from the outer peripheral surface of the tubular portion.
After forming a support portion in the mold capable of sandwiching the pressure receiving portion with the tip surface of the tubular holding portion, the mold is formed.
With the pressure receiving portion in contact with the supporting portion, the bottomed tubular part is set in the mold.
A method for manufacturing an insert molded product, in which an injection pressure is applied to the pressure receiving portion from a side opposite to the supporting portion. 前記受圧部の外周面を前記金型に接触させる請求項７に記載のインサート成形品の製造方法。 The method for manufacturing an insert molded product according to claim 7, wherein the outer peripheral surface of the pressure receiving portion is brought into contact with the mold. 前記金型に形成した位置決め突起を、前記筒部内に進入させる請求項７又は請求項８に記載のインサート成形品の製造方法。 The method for manufacturing an insert molded product according to claim 7 or 8, wherein the positioning protrusion formed on the mold is made to enter the tubular portion. 前記樹脂成形部が、板状基部から前記筒状保持部を突出させた形態であるインサート成形品を製造する方法であって、
前記金型のゲートを、前記板状基部の外周縁と対応する位置に設けた上で、前記溶融樹脂を、前記ゲートから前記板状基部の板面に沿って射出する請求項７から請求項９のいずれか１項に記載のインサート成形品の製造方法。 A method for producing an insert-molded product in which the resin-molded portion protrudes from the plate-shaped base portion.
Claims 7 to 7, wherein the gate of the mold is provided at a position corresponding to the outer peripheral edge of the plate-shaped base portion, and then the molten resin is injected from the gate along the plate surface of the plate-shaped base portion. 9. The method for manufacturing an insert molded product according to any one of 9.
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