JP6867920B2

JP6867920B2 - Mold for insert molding and resin molded product obtained by this

Info

Publication number: JP6867920B2
Application number: JP2017177470A
Authority: JP
Inventors: 美敬中西; 義一神川
Original assignee: Tokai Kogyo Co Ltd
Current assignee: Tokai Kogyo Co Ltd
Priority date: 2017-09-15
Filing date: 2017-09-15
Publication date: 2021-05-12
Anticipated expiration: 2037-09-15
Also published as: JP2019051650A

Description

本発明は、ボルト挿入孔の内周面に、中央貫通孔を有する筒形の金属部材がインサート成形により配設される樹脂成形品を射出成形するためのインサート成形用金型と、これにより得られる樹脂成形品に関する。 The present invention provides an insert molding die for injection molding a resin molded product in which a tubular metal member having a central through hole is arranged by insert molding on the inner peripheral surface of the bolt insertion hole. Regarding resin molded products to be manufactured.

このような樹脂成形品としては、例えば自動車用電子部品の筐体（ケース）等が挙げられるが、当該樹脂成形品を成形するためのインサート成形用金型として、例えば下記特許文献１がある。特許文献１には、樹脂成形品に配設する金属部材（カラー）の高さ寸法のバラツキや製造公差を吸収可能な金型が開示されている。具体的には、一対の固定型（下型）及び可動型（上型）と、カラーを挿入載置する入れ子とを備えてなる。入れ子は、固定型からキャビティ内へ出没自在となっており、対向する可動型側へ常時付勢されている。この入れ子は、カラーの中央貫通孔に挿通される柱状の上部と、カラーの載置ベースとなる皿状の底部とからなり、型締めした状態では、カラー上面が可動型と当接するよう、入れ子の高さ寸法が設計されている。このように、カラーを載置する入れ子をキャビティに対して出没自在に設けて、対向する可動型に向けて常時付勢していることで、カラーの高さ寸法のバラツキに対応している。 Examples of such a resin molded product include a housing (case) of an electronic component for an automobile. As an insert molding mold for molding the resin molded product, for example, Patent Document 1 below is provided. Patent Document 1 discloses a mold capable of absorbing variations in height dimensions and manufacturing tolerances of metal members (colors) arranged in a resin molded product. Specifically, it includes a pair of fixed type (lower type) and movable type (upper type), and a nest for inserting and mounting the collar. Nesting is free to move from the fixed mold into the cavity, and is constantly urged to the opposite movable mold side. This nest consists of a columnar upper part that is inserted into the central through hole of the collar and a dish-shaped bottom that serves as a base for placing the collar. In the molded state, the nest is made so that the upper surface of the collar comes into contact with the movable mold. The height dimension of is designed. In this way, by providing a nest on which the collar is placed so as to be able to appear and disappear in the cavity and constantly urging the movable type facing the cavity, it is possible to cope with variations in the height dimension of the collar.

特開２０１２-２５０４１９号公報Japanese Unexamined Patent Publication No. 2012-250419

しかしながら、特許文献１では、型締めした状態においてカラー上面と可動型とが当接している。すなわち、カラー上面と可動型とは面接触しており、接触面積が大きい。このとき、カラー上面と可動型との間への溶融樹脂の流入防止は、入れ子のバネ付勢力のみに依存している。しかし、射出成形ではキャビティ内へ溶融樹脂が比較的高い流入圧力で射出される。したがって、カラー上面と可動型とが面接触している状態では押圧力に限界があり、入れ子のバネ付勢力に抗して溶融樹脂がカラー上面と可動型との間へ流入してしまい、カラー上面が樹脂で覆われてしまう恐れがある。 However, in Patent Document 1, the upper surface of the collar and the movable mold are in contact with each other in the molded state. That is, the upper surface of the collar and the movable type are in surface contact with each other, and the contact area is large. At this time, the prevention of the inflow of the molten resin between the upper surface of the collar and the movable mold depends only on the spring-bearing force of the nest. However, in injection molding, the molten resin is injected into the cavity at a relatively high inflow pressure. Therefore, there is a limit to the pressing force when the upper surface of the collar and the movable mold are in surface contact with each other, and the molten resin flows into the space between the upper surface of the collar and the movable mold against the spring-forced force of the nest. The upper surface may be covered with resin.

また、特許文献１ではカラーの高さ寸法のバラツキには対応可能であるが、形状バラツキには対応不可能である。具体的には、カラー上面と可動型とが完全に平坦で全面的に密着していれば溶融樹脂の流入が防止され得るが、カラー上面又は可動型にも製造バラツキは避けらない。この場合、形状バラツキに起因してカラー上面と可動型との間に少しでも隙間が生じていれば、当該隙間に溶融樹脂が流入し、カラー上面が樹脂によって覆われてしまう。また、カラーの外径寸法が入れ子の底部より大きいと、この入れ子からはみ出した部分に溶融樹脂が流入して樹脂で覆われてしまう。 Further, in Patent Document 1, although it is possible to deal with the variation in the height dimension of the color, it is not possible to deal with the variation in the shape. Specifically, if the upper surface of the collar and the movable mold are completely flat and in close contact with each other, the inflow of the molten resin can be prevented, but the manufacturing variation of the upper surface of the collar or the movable mold is unavoidable. In this case, if there is any gap between the upper surface of the collar and the movable mold due to the shape variation, the molten resin will flow into the gap and the upper surface of the collar will be covered with the resin. Further, if the outer diameter of the collar is larger than the bottom of the nest, the molten resin flows into the portion protruding from the nest and is covered with the resin.

このようにカラー上面が樹脂で覆われてしまうと、カラーの中央貫通孔に挿通するボルトの締結力が樹脂によって阻害されて低下したり、樹脂成形品が破損したりする恐れがある。 If the upper surface of the collar is covered with the resin in this way, the fastening force of the bolt inserted into the central through hole of the collar may be hindered by the resin and lowered, or the resin molded product may be damaged.

また、特許文献１では、得られる樹脂成形品においてカラー上面とこれを囲む樹脂の表面は少なくとも面一、場合によってはカラー上面が樹脂で覆われることによってカラー上面よりも樹脂表面の方が高くなる可能性もある。これでは、ボルト締結力を効果的にカラーで受けることができなくなってしまう。 Further, in Patent Document 1, in the obtained resin molded product, the upper surface of the collar and the surface of the resin surrounding the collar are at least flush with each other, and in some cases, the upper surface of the collar is covered with the resin, so that the upper surface of the resin is higher than the upper surface of the collar. There is a possibility. In this case, the bolt fastening force cannot be effectively received by the collar.

そこで、本発明は上記課題を解決するものであって、樹脂に配設される金属部材の寸法バラツキのみならず、形状バラツキにも対応可能なインサート成形用金型と、これにより得られる樹脂成形品を提供することを目的とする。 Therefore, the present invention solves the above-mentioned problems, and is an insert molding die capable of dealing with not only dimensional variation of metal members arranged in a resin but also shape variation, and resin molding obtained thereby. The purpose is to provide goods.

そのための手段として、本発明は、ボルト挿入孔の内周面に、中央貫通孔を有する筒形の金属部材がインサート成形により配設される樹脂成形品を射出成形するためのインサート成形用金型であって、固定型と、該固定型に対して進退可能であり、型締めした状態で前記固定型と共にキャビティを形成する可動型と、前記固定型又は前記可動型の少なくとも一方から前記キャビティ内へ出没自在で、前記キャビティ内へ予めセットされた前記金属部材を押える押え部材とを有する。前記押え部材は、前記金属部材を押える方向へ常時付勢されており、型締めした状態において前記金属部材の外周縁全体を覆うように当接する当接面を有する。そのうえで、この当接面が、前記金属部材の外周縁に対して傾斜したテーパー面となっていることを特徴とする。 As a means for that, the present invention is an insert molding die for injection molding a resin molded product in which a tubular metal member having a central through hole is arranged by insert molding on the inner peripheral surface of the bolt insertion hole. A fixed mold, a movable mold that can move forward and backward with respect to the fixed mold and forms a cavity together with the fixed mold in a molded state, and the fixed mold or at least one of the movable molds in the cavity. It has a pressing member that can freely appear and disappear and presses the metal member preset in the cavity. The pressing member is constantly urged in the direction of pressing the metal member, and has a contact surface that contacts the metal member so as to cover the entire outer peripheral edge of the metal member in a molded state. On top of that, the contact surface is a tapered surface that is inclined with respect to the outer peripheral edge of the metal member.

これによれば、金型を型締めした状態において押え部材が金属部材の外周縁全体を覆うように当接するので、キャビティ内へ予めセットされている金属部材の軸方向端面側への溶融樹脂の流入は、押え部材によって塞き止められる。このとき、押え部材は金属部材を押える方向へ常時付勢された状態で、キャビティ内へ出没自在なので、金属部材の高さ寸法にバラツキがあったとしても、これに追従して押え部材のキャビティ内への突出量は自在に変動し、常に一定の押圧力を維持しながら押え部材が金属部材と当接する。而して、金属部材に高さ寸法のバラツキがあったとしても、これを有効に吸収することができる。 According to this, since the pressing member abuts so as to cover the entire outer peripheral edge of the metal member in the state where the mold is clamped, the molten resin on the axial end surface side of the metal member preset in the cavity The inflow is blocked by the holding member. At this time, since the pressing member is constantly urged in the direction of pressing the metal member and can freely appear and disappear in the cavity, even if the height dimension of the metal member varies, the cavity of the pressing member follows this. The amount of protrusion inward fluctuates freely, and the pressing member comes into contact with the metal member while always maintaining a constant pressing force. Therefore, even if there is a variation in height dimension of the metal member, this can be effectively absorbed.

加えて、本発明では押え部材が金属部材の外周縁と当接し、且つ、押え部材における金属部材との当接面は、傾斜したテーパー面となっている。すなわち、押え部材は金属部材の角部と斜めに当接する。したがって、押え部材と金属部材とは線接触となる。仮に金属部材の外周縁が面取り（Ｃ面）されているとしても、軸方向端面と接触する場合と比べて接触面積は十分に小さい。したがって、同じ付勢力でも、本発明では特許文献１のように面接触している場合よりも押圧力が集中するので、押え部材による溶融樹脂の塞き止め作用も大きい。これにより、金属部材の軸方向端面が樹脂で覆われることをより効果的に防止することができる。 In addition, in the present invention, the pressing member is in contact with the outer peripheral edge of the metal member, and the contact surface of the pressing member with the metal member is an inclined tapered surface. That is, the pressing member diagonally contacts the corner portion of the metal member. Therefore, the pressing member and the metal member are in line contact. Even if the outer peripheral edge of the metal member is chamfered (C surface), the contact area is sufficiently smaller than that in the case of contact with the axial end surface. Therefore, even with the same urging force, in the present invention, the pressing force is concentrated as compared with the case where the pressing force is in surface contact as in Patent Document 1, so that the pressing member has a large effect of blocking the molten resin. Thereby, it is possible to more effectively prevent the axial end face of the metal member from being covered with the resin.

そのうえ、押え部材における金属部材との当接面はテーパー面なので、金属部材に製造バラツキによる形状のバラツキや径方向寸法のバラツキがあったとしても、これを吸収することができる。 Moreover, since the contact surface of the pressing member with the metal member is a tapered surface, even if the metal member has a shape variation or a radial dimension variation due to manufacturing variation, it can be absorbed.

本発明のインサート成形用金型には、前記押え部材と直交して該押え部材に対して進退自在に配され、型締めした状態において前記金属部材を押えている前記押え部材の状態を保持するストッパー部材も設けることが好ましい。これによれば、溶融樹脂が押え部材の付勢力に抗して金属部材の軸方向端面側へ流入することを、より効果的に防止することができる。すなわち、金属部材の軸方向端面が樹脂で覆われることを、より効果的に防止することができる。 In the insert molding die of the present invention, the presser member is arranged so as to be movable back and forth with respect to the presser member at right angles to the presser member, and the state of the presser member holding the metal member in the molded state is maintained. It is preferable to also provide a stopper member. According to this, it is possible to more effectively prevent the molten resin from flowing into the axial end surface side of the metal member against the urging force of the pressing member. That is, it is possible to more effectively prevent the axial end face of the metal member from being covered with the resin.

前記押え部材に対向する金型には、前記金属部材をセットする位置決め凹部を形成することが好ましい。これによれば、キャビティ内へ予めセットする金属部材の位置決めが容易となることに加え、射出成形時に金属部材の位置ズレを防ぐことができる。 It is preferable to form a positioning recess for setting the metal member in the mold facing the pressing member. According to this, in addition to facilitating the positioning of the metal member set in advance in the cavity, it is possible to prevent the metal member from being displaced during injection molding.

前記押え部材が設けられた金型には、型締めした状態において前記金属部材の軸方向の一方面に当接する、又は前記金属部材の中央貫通孔に挿入される突出部が形成されることも好ましい。これによれば、射出成形時に金属部材をより安定化させることができる。 The mold provided with the pressing member may have a protruding portion that abuts on one surface of the metal member in the axial direction in the molded state or is inserted into the central through hole of the metal member. preferable. According to this, the metal member can be more stabilized at the time of injection molding.

また、本発明によれば、ボルト挿入孔の内周面に、中央貫通孔を有する筒形の金属部材がインサート成形により配設された樹脂成形品を提供することもできる。この樹脂成形品は、前記金属部材の周面全体が樹脂により覆われているが、前記金属部材の軸方向における少なくとも一方面には樹脂が存在せず、樹脂で覆われていない。そのうえで、前記周面を覆う樹脂の表面が、前記金属部材の軸方向における他方面側に向けて傾斜して前記金属部材の一方面よりも低い位置にあることを特徴とする。 Further, according to the present invention, it is also possible to provide a resin molded product in which a tubular metal member having a central through hole is arranged by insert molding on the inner peripheral surface of the bolt insertion hole. In this resin molded product, the entire peripheral surface of the metal member is covered with the resin, but the resin does not exist on at least one surface of the metal member in the axial direction and is not covered with the resin. On top of that, the surface of the resin covering the peripheral surface is inclined toward the other surface side in the axial direction of the metal member and is located at a position lower than one surface of the metal member.

これによれば、金属部材の軸方向における少なくとも一方面が樹脂で覆われておらず、且つ、樹脂の表面が当該金属部材の軸方向端面よりも低い位置にあるので、この軸方向端面は露出している。したがって、ボルト挿入孔にボルトを挿通して締結する際に、ボルトが金属部材と当接して金属部材によって締結力を的確に受けることができる。これにより、締結力の低下や樹脂成形品の破損を防止することができる。 According to this, at least one surface of the metal member in the axial direction is not covered with the resin, and the surface of the resin is at a position lower than the axial end surface of the metal member, so that the axial end surface is exposed. doing. Therefore, when the bolt is inserted into the bolt insertion hole and fastened, the bolt comes into contact with the metal member and the fastening force can be accurately received by the metal member. As a result, it is possible to prevent a decrease in the fastening force and damage to the resin molded product.

一方、金属部材の外周縁は、軸方向に全部又は一部が樹脂で覆われていても構わない。これにより、金属部材の角部が傷付き難くなる。 On the other hand, the outer peripheral edge of the metal member may be entirely or partially covered with resin in the axial direction. This makes it difficult for the corners of the metal member to be scratched.

本発明のインサート成形用金型によれば、インサート成形により樹脂に配設される金属部材に、製造バラツキに起因する高さ寸法のバラツキのみならず、形状や径方向寸法のバラツキをも吸収しながら、金属部材の軸方向端面が樹脂で覆われることを防止することができる。 According to the insert molding die of the present invention, the metal member disposed on the resin by insert molding absorbs not only the variation in height dimension due to the manufacturing variation but also the variation in shape and radial dimension. However, it is possible to prevent the axial end face of the metal member from being covered with the resin.

また、これにより得られる樹脂成形品は、金属部材の軸方向における少なくとも一方面が樹脂で覆われておらず露呈しており、且つ、樹脂の表面が当該金属部材の軸方向端面よりも低い位置にあるので、ボルト挿入孔にボルトを挿通して締結する際に、ボルトが樹脂に邪魔されることなく金属部材と当接する。これにより、ボルトの締結力を金属部材によって受けることができ、締結力の低下や樹脂成形品の破損を防止することができる。また、金属部材の外周縁、すなわち角部は樹脂によって保護されているので、当該角部が傷付き難くなる。 Further, in the resin molded product obtained thereby, at least one surface of the metal member in the axial direction is not covered with the resin and is exposed, and the surface of the resin is lower than the axial end surface of the metal member. Therefore, when the bolt is inserted into the bolt insertion hole and fastened, the bolt comes into contact with the metal member without being disturbed by the resin. As a result, the fastening force of the bolt can be received by the metal member, and it is possible to prevent a decrease in the fastening force and damage to the resin molded product. Further, since the outer peripheral edge of the metal member, that is, the corner portion is protected by the resin, the corner portion is less likely to be scratched.

樹脂成形品の斜視図である。It is a perspective view of the resin molded product. 図１のＡ−Ａ線断面図である。FIG. 1 is a cross-sectional view taken along the line AA of FIG. 型開き状態の金型における図１のＡ−Ａ線相当断面図である。It is sectional drawing which corresponds to line AA of FIG. 1 in the mold in the mold open state. 図３の状態から型締めした状態の金型の断面図である。It is sectional drawing of the mold in the state which the mold was fastened from the state of FIG. 形状バラツキのある金属部材と押え部材との当接状態を示す金型の要部拡大断面図である。It is an enlarged cross-sectional view of the main part of a mold which shows the contact state between a metal member having a variation in shape and a pressing member. 図５の状態で製造された樹脂成形品の要部拡大断面図である。FIG. 5 is an enlarged cross-sectional view of a main part of a resin molded product manufactured in the state of FIG. 別の形状バラツキのある金属部材と押え部材との当接状態を示す金型の要部拡大断面図である。It is an enlarged cross-sectional view of the main part of a mold which shows the contact state between a metal member with different shape variation and a pressing member. 図７の状態で製造された樹脂成形品の要部拡大断面図である。FIG. 7 is an enlarged cross-sectional view of a main part of a resin molded product manufactured in the state of FIG. 7. 外周縁がＲ形状の金属部材と押え部材との当接状態を示す金型の要部拡大断面図である。FIG. 5 is an enlarged cross-sectional view of a main part of a mold showing a contact state between a metal member having an R-shaped outer peripheral edge and a pressing member. 図９の状態で製造された樹脂成形品の要部拡大断面図である。FIG. 9 is an enlarged cross-sectional view of a main part of a resin molded product manufactured in the state of FIG. 金型の変形例を示す図１のＡ−Ａ線相当断面図である。It is sectional drawing corresponding to line AA of FIG. 1 which shows the modification of the mold.

以下、本発明の代表的な実施形態について説明する。本発明の製造対象である樹脂成形品は、例えば電子部品、センサ部品、小型装置、及び小型機構などの各種部品や物品等を所定箇所にボルト固定により配設するための筐体（ケース）や端子台などである。固定対象は特に限定されず、種々の機械、装置、構造物等に配設することができるが、例としては自動車等の電動ステアリングやパワーコントロールユニット等が挙げられる。 Hereinafter, typical embodiments of the present invention will be described. The resin molded product to be manufactured by the present invention includes, for example, a housing (case) for arranging various parts and articles such as electronic parts, sensor parts, small devices, and small mechanisms by bolting at predetermined positions. Such as a terminal block. The object to be fixed is not particularly limited and can be arranged in various machines, devices, structures and the like, and examples thereof include electric steering and power control units of automobiles and the like.

このような樹脂成形品１は、図１に示すように、筐体本体２と、筐体本体２の外面に設けられた複数のボルト固定部３とを一体的に備える。なお、図１に示す樹脂成形品１の形状はほんの一例であって、最もシンプルな形状を図示している。実際には、収容する各種部品や設置場所等に応じて樹脂成形品１は多種多様な形状に製造される。 As shown in FIG. 1, such a resin molded product 1 integrally includes a housing body 2 and a plurality of bolt fixing portions 3 provided on the outer surface of the housing body 2. The shape of the resin molded product 1 shown in FIG. 1 is only an example, and the simplest shape is shown. Actually, the resin molded product 1 is manufactured in a wide variety of shapes depending on various parts to be accommodated, an installation location, and the like.

筐体本体２は上面（図面基準）が開口する箱型であって、これの内部に各種部品等が収納される。必要に応じて、図示していない蓋によって上面開口が塞がれる。ボルト固定部３は、厚み方向に貫通したボルト挿入孔を有し、その内周面に、中央貫通孔４を有する筒型の金属部材５がインサート成形により配設されている。金属部材５の軸方向（中央貫通孔４の開口方向）は、ボルト固定部３の厚み方向と一致している。また、金属部材５の軸方向寸法はボルト固定部３の厚み寸法よりも僅かに大きい。 The housing body 2 has a box shape with an opening on the upper surface (reference to the drawing), and various parts and the like are stored inside the box. If necessary, a lid (not shown) closes the top opening. The bolt fixing portion 3 has a bolt insertion hole penetrating in the thickness direction, and a tubular metal member 5 having a central through hole 4 is arranged on the inner peripheral surface thereof by insert molding. The axial direction of the metal member 5 (opening direction of the central through hole 4) coincides with the thickness direction of the bolt fixing portion 3. Further, the axial dimension of the metal member 5 is slightly larger than the thickness dimension of the bolt fixing portion 3.

そして、図２の想像線で示すように、金属部材５の中央貫通孔４にボルトＢを挿通した状態でボルトＢを締結することで、樹脂成形品１を所定箇所へ固定することができる。このとき、ボルトＢの頭部Ｂｈが金属部材５の上面（以下、ボルト受け面５ａと称す）と当接することで、当該ボルト受け面５ａでボルトの締結力を受けることになる。これにより、ボルト固定部３延いては樹脂成形品１の破損が防止される。 Then, as shown by the imaginary line in FIG. 2, the resin molded product 1 can be fixed at a predetermined position by fastening the bolt B with the bolt B inserted through the central through hole 4 of the metal member 5. At this time, when the head Bh of the bolt B comes into contact with the upper surface of the metal member 5 (hereinafter referred to as the bolt receiving surface 5a), the bolt fastening force is received at the bolt receiving surface 5a. As a result, the bolt fixing portion 3 and the resin molded product 1 are prevented from being damaged.

金属部材５としては、典型的にはカラーが挙げられるが、雌ネジ（ナット）でもよい。金属部材５の外形は円形のほか、三角形や四角形等の多角形でもよく、特に制限はない。一方、金属部材５の内形（中央貫通孔４の径方向断面形状）は、円形である。ボルトＢを挿通するための孔だからである。金属部材５の内径（中央貫通孔４の直径）は、ボルトＢのネジ軸Ｂｓの外径よりも大きく、ボルトＢの頭部Ｂｈの外径よりも小さい。金属部材５の軸方向寸法は、ボルトＢのネジ軸Ｂｓの長さ寸法よりも小さい。 The metal member 5 is typically a collar, but may be a female screw (nut). The outer shape of the metal member 5 may be a polygon such as a triangle or a quadrangle as well as a circle, and there is no particular limitation. On the other hand, the inner shape of the metal member 5 (the radial cross-sectional shape of the central through hole 4) is circular. This is because it is a hole for inserting the bolt B. The inner diameter of the metal member 5 (diameter of the central through hole 4) is larger than the outer diameter of the screw shaft Bs of the bolt B and smaller than the outer diameter of the head Bh of the bolt B. The axial dimension of the metal member 5 is smaller than the length dimension of the screw shaft Bs of the bolt B.

次に、上記樹脂成形品１を製造するためのインサート成形用金型（以下、単に金型と称す）について説明する。この金型は、図３，４に示すように、固定型１０と、固定型１０に対して相対的に進退可能な可動型２０とを備える。図３は型開き状態であり、図４は型締め状態である。可動型２０を固定型１０に突き合わせた型締め状態では、求める樹脂成形品１の形状に応じたキャビティが形成される。なお、各図面にはボルト固定部３に対応するキャビティのみが図示されているが、筐体本体２用のキャビティも、図示しているボルト固定部３用のキャビティと連続して形成されている。これらのキャビティ内には、図外のノズルを介して射出される溶融樹脂がランナを通して供給される。 Next, a mold for insert molding (hereinafter, simply referred to as a mold) for manufacturing the resin molded product 1 will be described. As shown in FIGS. 3 and 4, this mold includes a fixed mold 10 and a movable mold 20 that can move forward and backward relative to the fixed mold 10. FIG. 3 shows a mold opening state, and FIG. 4 shows a mold tightening state. In the mold-fastened state in which the movable mold 20 is abutted against the fixed mold 10, a cavity corresponding to the desired shape of the resin molded product 1 is formed. Although only the cavity corresponding to the bolt fixing portion 3 is shown in each drawing, the cavity for the housing body 2 is also formed continuously with the cavity for the bolt fixing portion 3 shown in the drawing. .. In these cavities, molten resin injected through a nozzle (not shown) is supplied through a runner.

また、可動型２０には、金属製の押え部材３０が設けられている。この押え部材３０は、金型を型締めすると、キャビティ内へ予めセットされている金属部材５に当接する。詳しくは、金属部材５はボルト受け面５ａが可動型２０側となるようにキャビティ内へ予めセットされており、金型を型締めすると、押え部材３０は金属部材５のボルト受け面５ａ側の外周縁と当接する。このとき、押え部材３０における金属部材５との対向面には、径方向中央部に押え凹部３２が形成されており、この押え凹部３２の周壁が金属部材５の外周縁５ｂと当接する当接面３０ａとなる。押え凹部３２は末拡がり状であり、当接面３０ａは外拡がりに傾斜したテーパー面となっている。 Further, the movable type 20 is provided with a metal pressing member 30. When the mold is fastened, the pressing member 30 comes into contact with the metal member 5 preset in the cavity. Specifically, the metal member 5 is preset in the cavity so that the bolt receiving surface 5a is on the movable mold 20 side, and when the mold is clamped, the holding member 30 is on the bolt receiving surface 5a side of the metal member 5. Contact with the outer periphery. At this time, a pressing recess 32 is formed in the central portion in the radial direction on the surface of the pressing member 30 facing the metal member 5, and the peripheral wall of the pressing recess 32 comes into contact with the outer peripheral edge 5b of the metal member 5. It becomes the surface 30a. The pressing recess 32 has a divergent shape, and the contact surface 30a has a tapered surface that is inclined outward.

押え部材３０の外径は、金属部材５の外径よりも大きい。押え凹部３２の最小径（押え凹部３２の底側の直径）は金属部材５の外径よりも小さく、押え凹部３２の最大径（押え凹部３２の開口側の直径）は金属部材５の外径よりも大きい。また、押え部材３０の外形は特に制限ないが、押え凹部３２の周形（当接面３０ａの輪郭）は金属部材５の外径と一致（正確には相似）している。これにより、金型の型締め状態では、押え部材３０の当接面３０ａが、金属部材５のボルト受け面５ａ側の外周縁５ｂ全体を覆うように当接する。 The outer diameter of the pressing member 30 is larger than the outer diameter of the metal member 5. The minimum diameter of the presser recess 32 (diameter on the bottom side of the presser recess 32) is smaller than the outer diameter of the metal member 5, and the maximum diameter of the presser recess 32 (diameter on the opening side of the presser recess 32) is the outer diameter of the metal member 5. Greater than. The outer shape of the pressing member 30 is not particularly limited, but the circumferential shape (contour of the contact surface 30a) of the pressing recess 32 matches (accurately resembles) the outer diameter of the metal member 5. As a result, in the mold-tightened state of the mold, the contact surface 30a of the pressing member 30 comes into contact with the metal member 5 so as to cover the entire outer peripheral edge 5b on the bolt receiving surface 5a side.

押え部材３０は、バネ３１によって金属部材５を押える方向へ常時付勢されており、可動型２０からキャビティ内へ出没自在となっている。この型締め状態でも押え部材３０はキャビティ内に突出しており、射出された溶融樹脂を堰き止める機能も備えている。 The pressing member 30 is constantly urged in the direction of pressing the metal member 5 by the spring 31, and can freely move in and out of the cavity from the movable mold 20. Even in this molding state, the pressing member 30 protrudes into the cavity and also has a function of blocking the injected molten resin.

また、可動型２０には、押え部材３０と直交するようにストッパー部材３５が配されている。ストッパー部材３５は、キャビティとは独立した空間に存在する。このストッパー部材３５は、押え部材３０の周面に凹み形成された受入空間３３に対して、図外の進退手段により進退自在となっている。ストッパー部材３５を押え部材３０に対して進退操作する進退手段としては、金型の開閉に伴ってストッパー部材３５を進退させるカム機構のほか、サーボモーターや油圧シリンダ等を使用することができる。押え部材３０の受入空間３３における固定型１０側の面３３ａと、ストッパー部材３５における固定型１０側の面３５ａは、それぞれ同じ角度で傾斜した傾斜面となっている。 Further, in the movable type 20, a stopper member 35 is arranged so as to be orthogonal to the pressing member 30. The stopper member 35 exists in a space independent of the cavity. The stopper member 35 is free to advance and retreat by means of advancing and retreating (not shown) with respect to the receiving space 33 formed in a recess on the peripheral surface of the pressing member 30. As the advancing / retreating means for advancing / retreating the stopper member 35 with respect to the pressing member 30, a cam mechanism for advancing / retreating the stopper member 35 as the mold is opened / closed, a servomotor, a hydraulic cylinder, or the like can be used. The surface 33a on the fixed mold 10 side in the receiving space 33 of the pressing member 30 and the surface 35a on the fixed mold 10 side in the stopper member 35 are inclined surfaces inclined at the same angle, respectively.

一方、固定型１０には、金属部材５の外径に対応した位置決め凹部１１が形成されており、金属部材５はこの位置決め凹部１１にセットされる。これにより、金属部材５の位置決めが容易となると共に、射出成形時に金属部材５の位置ズレが防がれて安定化する。 On the other hand, the fixed mold 10 is formed with a positioning recess 11 corresponding to the outer diameter of the metal member 5, and the metal member 5 is set in the positioning recess 11. This facilitates the positioning of the metal member 5 and prevents the metal member 5 from being displaced during injection molding to stabilize the metal member 5.

続いて、インサート成形する際の作用効果について説明する。先ず、図３に示す型開き状態において、金属部材５をボルト受け面５ａが押え部材３０と対向するように固定型１０の位置決め凹部１１へセットする。このとき、押え部材３０のキャビティ内への突出量は最大である。また、ストッパー部材３５は押え部材３０の受入空間３３に進入していない後退位置にある。その後、可動型２０を移動させて型締めすると、図４に示すように固定型１０と可動型２０との間に所定形状のキャビティが形成される。また、型締めに伴い、押え部材３０の当接面３０ａが、金属部材５のボルト受け面５ａ側の外周縁５ｂと当接する。このとき、当接面３０ａの輪郭と金属部材５の外形とは同じなので、金属部材５は、ボルト受け面５ａ側の外周縁５ｂ全体が押え部材３０によって覆われるように当接面３０ａと当接する。また、金属部材５が押え部材３０の角と当接すると金属部材５が削られてしまうおそれがあるが、金属部材５のボルト受け面５ａ側の外周縁５ｂが押え部材３０の当接面３０ａと当接しているため、金属部材５が削られることがない。 Next, the action and effect of insert molding will be described. First, in the mold open state shown in FIG. 3, the metal member 5 is set in the positioning recess 11 of the fixed mold 10 so that the bolt receiving surface 5a faces the pressing member 30. At this time, the amount of protrusion of the pressing member 30 into the cavity is maximum. Further, the stopper member 35 is in a retracted position where the pressing member 30 does not enter the receiving space 33. After that, when the movable mold 20 is moved and molded, a cavity having a predetermined shape is formed between the fixed mold 10 and the movable mold 20 as shown in FIG. Further, with the mold clamping, the contact surface 30a of the pressing member 30 comes into contact with the outer peripheral edge 5b on the bolt receiving surface 5a side of the metal member 5. At this time, since the contour of the contact surface 30a and the outer shape of the metal member 5 are the same, the metal member 5 hits the contact surface 30a so that the entire outer peripheral edge 5b on the bolt receiving surface 5a side is covered by the pressing member 30. Get in touch. Further, if the metal member 5 comes into contact with the corner of the pressing member 30, the metal member 5 may be scraped, but the outer peripheral edge 5b on the bolt receiving surface 5a side of the metal member 5 is the contact surface 30a of the pressing member 30. The metal member 5 is not scraped because it is in contact with the metal member 5.

押え部材３０は、金属部材５に当接すると、型締め力によってバネ３１の付勢力に抗して可動型２０内へ僅かに没入する。この状態で、押え部材３０にはバネ３１からの付勢力が作用しているので、金属部材５は押え部材３０によって押えられている。また、金型の型締めに伴い、ストッパー部材３５が押え部材３０の受入空間３３に進入する。これにより、金属部材５を押えている押え部材３０の状態が保持される。つまり、押え部材３０が溶融樹脂の充填圧力によって不必要に可動型２０内へ没入することが防止される。このとき、ストッパー部材３５の傾斜面３５ａと受入空間３３の傾斜面３３ａとが当接している。このように、ストッパー部材３５と受入空間３３との当接面が傾斜しているので、金属部材５の高さバラツキの吸収に伴う押え部材３０の高さ位置のバラツキも吸収でき、ストッパー部材３５と受入空間３３との当接状態が保持される。 When the pressing member 30 comes into contact with the metal member 5, the pressing member 30 slightly immerses itself in the movable mold 20 against the urging force of the spring 31 due to the mold clamping force. In this state, since the pressing force from the spring 31 acts on the pressing member 30, the metal member 5 is pressed by the pressing member 30. Further, as the mold is tightened, the stopper member 35 enters the receiving space 33 of the pressing member 30. As a result, the state of the pressing member 30 holding the metal member 5 is maintained. That is, the pressing member 30 is prevented from being unnecessarily immersed in the movable mold 20 due to the filling pressure of the molten resin. At this time, the inclined surface 35a of the stopper member 35 and the inclined surface 33a of the receiving space 33 are in contact with each other. Since the contact surface between the stopper member 35 and the receiving space 33 is inclined in this way, it is possible to absorb the variation in the height position of the pressing member 30 due to the absorption of the height variation in the metal member 5, and the stopper member 35. The contact state between the metal and the receiving space 33 is maintained.

なお、金属部材５の高さ寸法にバラツキがあったとしても、押え部材３０の可動型２０への没入量が変化するだけで、押え部材３０と金属部材５との接触状態は変わらない。すなわち、押え部材３０の可動型２０への没入量によって、金属部材５の高さ寸法のバラツキが吸収される。また、金属部材５の外周縁５ｂに形状バラツキがあったり、径方向寸法にバラツキがあったとしても、押え部材３０の当接面３０ａは金属部材５に対して傾斜しているので、当接位置が変わるだけである。これにより、金属部材５の形状バラツキや径方向寸法バラツキも吸収される。 Even if the height dimension of the metal member 5 varies, the contact state between the presser member 30 and the metal member 5 does not change, only the amount of immersion of the presser member 30 into the movable mold 20 changes. That is, the variation in the height dimension of the metal member 5 is absorbed by the amount of immersion of the pressing member 30 into the movable mold 20. Further, even if the outer peripheral edge 5b of the metal member 5 has a shape variation or a radial dimension variation, the contact surface 30a of the pressing member 30 is inclined with respect to the metal member 5, so that the contact surface 30a is in contact with the metal member 5. It only changes its position. As a result, the shape variation and the radial dimensional variation of the metal member 5 are also absorbed.

そのうえで、キャビティ内へ溶融樹脂を射出充填する。このとき、押え部材３０の当接面３０ａが金属部材５の外周縁５ｂ全体を囲っているので、溶融樹脂は押え部材３０によって堰き止められ、金属部材５のボルト受け面５ａ上に流入することは無い。しかも、溶融樹脂は比較的高い圧力で充填されるが、押え部材３０がバネ３１の付勢力とストッパー部材３５によって押えられていると共に、傾斜面３０ａと外周縁５ｂとの接触面積は小さいので、溶融樹脂が金属部材５のボルト受け面５ａ上に流入することが効果的に防止される。 Then, the molten resin is injected and filled into the cavity. At this time, since the contact surface 30a of the pressing member 30 surrounds the entire outer peripheral edge 5b of the metal member 5, the molten resin is blocked by the pressing member 30 and flows into the bolt receiving surface 5a of the metal member 5. There is no. Moreover, although the molten resin is filled with a relatively high pressure, the pressing member 30 is pressed by the urging force of the spring 31 and the stopper member 35, and the contact area between the inclined surface 30a and the outer peripheral edge 5b is small. The molten resin is effectively prevented from flowing into the bolt receiving surface 5a of the metal member 5.

溶融樹脂が冷却固化したら、再度型開きすれば、金属部材５が配設された状態で、図２に示す樹脂成形品１が得られる。この樹脂成形品１では、金属部材５の周面全体が樹脂によって覆われているが、ボルト受け面５ａには樹脂が存在せず、樹脂で覆われていない。しかも、金属部材５の周面を覆う樹脂の表面は、ボルト受け面５ａとは反対側に向けて傾斜してボルト受け面５ａよりも低い位置にある。これにより、ボルト受け面５ａは外部に露呈している。したがって、中央貫通孔４にボルトＢを挿通して締結する際に、ボルトＢの頭部Ｂｈが樹脂に邪魔されることなく金属部材５のボルト受け面５ａに当接し、ボルトＢによる締結力が金属部材５によって受け止められる。これにより、ボルト締結力の低下や樹脂成形品１の破損が防止される。 When the molten resin is cooled and solidified, the mold is reopened to obtain the resin molded product 1 shown in FIG. 2 with the metal member 5 disposed. In this resin molded product 1, the entire peripheral surface of the metal member 5 is covered with the resin, but the bolt receiving surface 5a does not have the resin and is not covered with the resin. Moreover, the surface of the resin covering the peripheral surface of the metal member 5 is inclined toward the side opposite to the bolt receiving surface 5a and is at a position lower than the bolt receiving surface 5a. As a result, the bolt receiving surface 5a is exposed to the outside. Therefore, when the bolt B is inserted into the central through hole 4 and fastened, the head Bh of the bolt B comes into contact with the bolt receiving surface 5a of the metal member 5 without being disturbed by the resin, and the fastening force by the bolt B is applied. It is received by the metal member 5. This prevents a decrease in the bolt fastening force and damage to the resin molded product 1.

一方、ボルト受け面５ａ側の外周縁５ｂが面取りされたテーパー面となっている場合、押え部材３０の当接面３０ａと、ボルト受け面５ａ側の外周縁５ｂの傾斜角度が一致していれば、外周縁５ｂも樹脂によって覆われることはない。しかし、前述のように、外周縁５ｂには製造バラツキにより形状のバラツキがある。 On the other hand, when the outer peripheral edge 5b on the bolt receiving surface 5a side is a chamfered tapered surface, the inclination angle of the contact surface 30a of the pressing member 30 and the outer peripheral edge 5b on the bolt receiving surface 5a side should be the same. For example, the outer peripheral edge 5b is not covered with the resin. However, as described above, the outer peripheral edge 5b has a shape variation due to manufacturing variation.

例えば、図５に示すように、金属部材５のボルト受け面５ａ側の外周縁５ｂの傾斜角度が、押え部材３０の当接面３０ａの傾斜角度よりも小さい場合は、外周縁５ｂの最外縁が当接面３０ａと当接することになる。この場合も、図６に示すように、得られる樹脂成形品１において、金属部材５の外周縁５ｂは樹脂によって覆われていない。 For example, as shown in FIG. 5, when the inclination angle of the outer peripheral edge 5b on the bolt receiving surface 5a side of the metal member 5 is smaller than the inclination angle of the contact surface 30a of the pressing member 30, the outermost edge of the outer peripheral edge 5b Will come into contact with the contact surface 30a. Also in this case, as shown in FIG. 6, in the obtained resin molded product 1, the outer peripheral edge 5b of the metal member 5 is not covered with the resin.

これに対し、図７に示すように、金属部材５のボルト受け面５ａ側の外周縁５ｂの傾斜角度が、押え部材３０の当接面３０ａの傾斜角度よりも大きい場合は、外周縁５ｂの最内縁が当接面３０ａと当接することになる。この場合は、図８に示すように、得られる樹脂成形品１において、金属部材５の外周縁５ｂが軸方向全体に亘って樹脂によって覆われる。なお、ボルト受け面５ａが樹脂によって覆われていない限り、外周縁５ｂが樹脂によって覆われていても問題はない。逆に、外周縁５ｂが樹脂によって覆われていれば、当該外周縁５ｂが樹脂によって保護され、傷付き難いというメリットが得られる。 On the other hand, as shown in FIG. 7, when the inclination angle of the outer peripheral edge 5b on the bolt receiving surface 5a side of the metal member 5 is larger than the inclination angle of the contact surface 30a of the pressing member 30, the outer peripheral edge 5b The innermost edge comes into contact with the contact surface 30a. In this case, as shown in FIG. 8, in the obtained resin molded product 1, the outer peripheral edge 5b of the metal member 5 is covered with the resin over the entire axial direction. As long as the bolt receiving surface 5a is not covered with the resin, there is no problem even if the outer peripheral edge 5b is covered with the resin. On the contrary, if the outer peripheral edge 5b is covered with the resin, the outer peripheral edge 5b is protected by the resin, and there is an advantage that the outer peripheral edge 5b is not easily scratched.

また、金属部材５によっては、外周縁５ｂがＲ形状（曲面）のものもある。この場合、図９に示すように、外周縁５ｂの軸方向中央部が当接面３０ａと当接することになる。したがって、これにより得られる樹脂成形品１では、図１０に示すように、外周縁５ｂの軸方向一部が樹脂によって覆われることになる。この場合でも、外周縁５ｂの一部が樹脂によって保護され傷付き難くなるというメリットが得られる。 Further, depending on the metal member 5, the outer peripheral edge 5b may have an R shape (curved surface). In this case, as shown in FIG. 9, the central portion of the outer peripheral edge 5b in the axial direction comes into contact with the contact surface 30a. Therefore, in the resin molded product 1 obtained thereby, as shown in FIG. 10, a part of the outer peripheral edge 5b in the axial direction is covered with the resin. Even in this case, there is an advantage that a part of the outer peripheral edge 5b is protected by the resin and is not easily scratched.

以上、本発明の代表的な実施形態について説明したが、これに限られることはなく、本発明の要旨を逸脱しない範囲で、種々の変更が可能である。 Although the typical embodiments of the present invention have been described above, the present invention is not limited to this, and various modifications can be made without departing from the gist of the present invention.

例えば、図１１に示すように、可動型２０に、型締め状態において金属部材５のボルト受け面５ａに当接する突出部２０ａを形成することもできる。この突出部２０ａは、直径が金属部材５の中央貫通孔４の直径より大きく、ぱね２０ｂによって金属部材５を押える方向に常時付勢されている。これにより、突出部２０ａによっても金属部材５の高さ寸法のバラツキを吸収して金属部材５を押さえ、さらに金属部材５を押える押圧力が増大することで、金属部材５の径方向の位置ズレ防止にも有効である。この場合、押え部材３０の径方向中央部に貫通孔を設け、この貫通孔に突出部２０ａが挿通された状態で配せばよい。また、バネ３１も、突出部２０ａの周囲に配される。なお、押え部材３０が出没自在なことで金属部材５の高さ寸法のバラツキを吸収できることに変わりはない。 For example, as shown in FIG. 11, the movable mold 20 may be formed with a protruding portion 20a that abuts on the bolt receiving surface 5a of the metal member 5 in the mold-tightened state. The protrusion 20a has a diameter larger than the diameter of the central through hole 4 of the metal member 5, and is constantly urged in the direction of pressing the metal member 5 by the pan 20b. As a result, the protrusion 20a also absorbs the variation in the height dimension of the metal member 5 to press the metal member 5, and further increases the pressing force for pressing the metal member 5, so that the metal member 5 is displaced in the radial direction. It is also effective in prevention. In this case, a through hole may be provided in the radial center portion of the pressing member 30, and the pressing member 30 may be arranged in a state where the protruding portion 20a is inserted through the through hole. The spring 31 is also arranged around the protrusion 20a. Since the pressing member 30 can freely appear and disappear, it is still possible to absorb the variation in the height dimension of the metal member 5.

または、突出部２０ａの長さをより長くし、且つ突出部２０ａの直径を金属部材５の中央貫通孔４の直径よりも小さくして、型締め状態において突出部２０ａが金属部材５の中央貫通孔４内に挿入されるように設計することもできる。この場合は、金属部材５の径方向への位置ズレが防止される。 Alternatively, the length of the protruding portion 20a is made longer, and the diameter of the protruding portion 20a is made smaller than the diameter of the central through hole 4 of the metal member 5, so that the protruding portion 20a penetrates the center of the metal member 5 in the molded state. It can also be designed to be inserted into the hole 4. In this case, the positional deviation of the metal member 5 in the radial direction is prevented.

各図面には、可動型２０が上下方向に移動する状態で示したが、固定型１０及び可動型２０を横向きにして、可動型２０が左右方向に移動するものでも構わない。また、押え部材３０及びストッパー部材３５を固定型１０に設けて、押え部材３０が固定型１０からキャビティ内へ出没自在に設けることもできる。この場合、可動型２０が上下方向に移動するなら、金属部材５は押え部材３０の押え凹部３２にセットすることになる。したがって、金属部材５のボルト受け面５ａ側の外周縁５ｂと押え部材３０の当接面３０ａとは、型開き状態から当接していることになる。但し、型締めにより押え部材３０がキャビティ内に出没することに変わりは無いので、本発明と同じ上述の作用効果は得られる。または、押え部材３０を、固定型１０と可動型２０の双方に設けることもできる。この場合、金属部材５のボルト受け面５ａとは反対側の軸方向端面も、樹脂で覆われることを効果的に防ぐことができる。 In each drawing, the movable mold 20 is shown in a state of moving in the vertical direction, but the fixed mold 10 and the movable mold 20 may be turned sideways and the movable mold 20 may move in the horizontal direction. Further, the pressing member 30 and the stopper member 35 may be provided on the fixed mold 10 so that the pressing member 30 can freely appear and disappear in the cavity from the fixed mold 10. In this case, if the movable mold 20 moves in the vertical direction, the metal member 5 is set in the pressing recess 32 of the pressing member 30. Therefore, the outer peripheral edge 5b on the bolt receiving surface 5a side of the metal member 5 and the contact surface 30a of the pressing member 30 are in contact with each other from the mold-opened state. However, since the pressing member 30 still appears and disappears in the cavity due to the mold clamping, the same above-mentioned action and effect as in the present invention can be obtained. Alternatively, the pressing member 30 can be provided on both the fixed mold 10 and the movable mold 20. In this case, the axial end surface of the metal member 5 opposite to the bolt receiving surface 5a can also be effectively prevented from being covered with the resin.

押え部材３０は、バネ３１によって付勢するほか、押え部材３０を設ける側の金型と押え部材３０との間に弾性力の高いゴム材等を介在させたり、エアシリンダや油圧シリンダ等によって寸法バラツキを吸収しながら機械的に付勢することもできる。 In addition to being urged by a spring 31, the presser member 30 is dimensioned by an air cylinder, a hydraulic cylinder, or the like, or by interposing a rubber material or the like having a high elastic force between the mold on which the presser member 30 is provided and the presser member 30. It can also be mechanically urged while absorbing variations.

ストッパー部材３５は、必ずしも必要ない。ストッパー部材３５は、押え部材３０と直交するように配される限り、押え部材３０の受入空間３３内に進入させるのみならず、押え部材３０の上面と摺接するよう設けることもできる。この場合、傾斜面３３ａは押え部材３０の上面周縁部に形成する。また、ストッパー部材３５は、１ヶ所に設けるのみならず、複数個所に設けることも好ましい。押え部材３０が円柱形であれば、少なくとも対向状に２カ所、好ましくは周方向に等間隔で３ヵ所設ける。これにより、押え部材３０の保持力が高まることに加え、安定して保持することができる。ストッパー部材３５を設ける数は、４ヵ所以下が好ましい。あまり多くても、構造が複雑になり過ぎるからである。押え部材３０が角柱形であれば、角柱の側面と同じ数のストッパー部材３５を設けることもできる。 The stopper member 35 is not always necessary. As long as the stopper member 35 is arranged so as to be orthogonal to the pressing member 30, it can be provided not only to enter the receiving space 33 of the pressing member 30 but also to be in sliding contact with the upper surface of the pressing member 30. In this case, the inclined surface 33a is formed on the upper peripheral edge of the pressing member 30. Further, it is preferable that the stopper member 35 is provided not only at one place but also at a plurality of places. If the pressing member 30 has a cylindrical shape, it is provided at least at two locations facing each other, preferably at three locations at equal intervals in the circumferential direction. As a result, in addition to increasing the holding force of the pressing member 30, it is possible to hold the pressing member 30 in a stable manner. The number of stopper members 35 provided is preferably 4 or less. This is because, if there are too many, the structure becomes too complicated. If the pressing member 30 has a prismatic shape, the same number of stopper members 35 as the side surfaces of the prism can be provided.

押え部材３０が設けられていない側の金型には、必ずしも金属部材５セット用の位置決め凹部１１は必要ない。また、押え部材３０が溶融樹脂の充填圧力等によって不必要に可動型２０内へ没入することを防止できる限り、押え部材３０とストッパー部材３５との相対関係（形状）に制限はない。例えば、押え部材３０に受入空間３３を設けず、ストッパー部材３５を押え部材３０の側面又は上面に当接させることもできる。 The mold on the side where the pressing member 30 is not provided does not necessarily need the positioning recess 11 for 5 sets of metal members. Further, as long as the pressing member 30 can be prevented from being unnecessarily immersed in the movable mold 20 due to the filling pressure of the molten resin or the like, the relative relationship (shape) between the pressing member 30 and the stopper member 35 is not limited. For example, the holding space 33 may not be provided with the receiving space 33, and the stopper member 35 may be brought into contact with the side surface or the upper surface of the holding member 30.

１樹脂成形品
３ボルト固定部
４中央貫通孔
５金属部材
５ａボルト受け面
５ｂ外周縁
１０固定型
１１位置決め凹部
２０可動型
２０ａ突出部
３０押え部材
３０ａ当接面
３２押え凹部
３５ストッパー部材
Ｂボルト
Ｂｈ頭部
Ｂｓネジ軸

1 Resin molded product 3 Bolt fixing part 4 Central through hole 5 Metal member 5a Bolt receiving surface 5b Outer peripheral edge 10 Fixed type 11 Positioning recess 20 Movable type 20a Protruding part 30 Pressing member 30a Contact surface 32 Pressing recess 35 Stopper member B Bolt Bh Head Bs screw shaft

Claims

ボルト挿入孔の内周面に、中央貫通孔を有する筒形の金属部材がインサート成形により配設される樹脂成形品を射出成形するためのインサート成形用金型であって、
固定型と、
該固定型に対して進退可能であり、型締めした状態で前記固定型と共にキャビティを形成する可動型と、
前記固定型又は前記可動型の少なくとも一方から前記キャビティ内へ出没自在で、前記キャビティ内へ予めセットされた前記金属部材を押える押え部材と、
前記押え部材と直交して該押え部材に対して進退自在に配され、型締めした状態において前記金属部材を押えている前記押え部材の状態を保持するストッパー部材とを有し、
前記押え部材は、前記金属部材を押える方向へ常時付勢されており、型締めした状態において前記金属部材の外周縁全体を覆うように当接する当接面を有し、
前記当接面が、前記金属部材の外周縁に対して傾斜したテーパー面となっている、インサート成形用金型。 An insert molding die for injection molding a resin molded product in which a tubular metal member having a central through hole is arranged by insert molding on the inner peripheral surface of the bolt insertion hole.
Fixed type and
A movable type that can move forward and backward with respect to the fixed type and forms a cavity together with the fixed type in a molded state.
A pressing member that can freely appear and disappear in the cavity from at least one of the fixed type or the movable type and presses the metal member preset in the cavity.
It has a stopper member that is orthogonal to the pressing member and is arranged so as to be able to advance and retreat with respect to the pressing member and holds the state of the pressing member holding the metal member in a molded state .
The pressing member is constantly urged in the direction of pressing the metal member, and has a contact surface that contacts the metal member so as to cover the entire outer peripheral edge of the metal member in a molded state.
An insert molding die in which the contact surface is a tapered surface inclined with respect to the outer peripheral edge of the metal member.

前記押え部材に対向する金型には、前記金属部材をセットする位置決め凹部が形成されている、請求項１に記載のインサート成形用金型。 The mold for insert molding according to claim 1, wherein a positioning recess for setting the metal member is formed in the mold facing the pressing member.

前記押え部材が設けられた金型には、型締めした状態において前記金属部材の軸方向の一方面に当接する、又は前記金属部材の中央貫通孔に挿入される突出部が形成されている、請求項１または請求項２に記載のインサート成形用金型。 The mold provided with the pressing member is formed with a protruding portion that abuts on one surface of the metal member in the axial direction in the molded state or is inserted into the central through hole of the metal member. The insert molding die according to claim 1 or 2.

ボルト挿入孔の内周面に、中央貫通孔を有する筒形の金属部材がインサート成形により配設された樹脂成形品であって、
前記金属部材の周面全体が樹脂により覆われ、
前記金属部材の軸方向における少なくとも一方面には樹脂が存在せず、
前記周面を覆う樹脂の表面が、前記金属部材の軸方向における他方面側に向けて傾斜して前記金属部材の一方面よりも低い位置にある、樹脂成形品。 A resin molded product in which a tubular metal member having a central through hole is arranged by insert molding on the inner peripheral surface of the bolt insertion hole.
The entire peripheral surface of the metal member is covered with resin,
There is no resin on at least one surface of the metal member in the axial direction,
A resin molded product in which the surface of the resin covering the peripheral surface is inclined toward the other surface side in the axial direction of the metal member and is located at a position lower than one surface of the metal member.

前記金属部材の一方面側の外周縁は、軸方向に全部又は一部が樹脂で覆われている、請求項４に記載の樹脂成形品。
The resin molded product according to claim 4, wherein the outer peripheral edge on one side of the metal member is entirely or partially covered with a resin in the axial direction.