JP5852943B2 - Injection molding method - Google Patents
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- JP5852943B2 JP5852943B2 JP2012213391A JP2012213391A JP5852943B2 JP 5852943 B2 JP5852943 B2 JP 5852943B2 JP 2012213391 A JP2012213391 A JP 2012213391A JP 2012213391 A JP2012213391 A JP 2012213391A JP 5852943 B2 JP5852943 B2 JP 5852943B2
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Description
本発明は、特に回転体の射出成形方法に関する。 The present invention particularly relates to a method for injection molding a rotating body.
樹脂部品は主に金型に高温で溶融した樹脂を高圧で射出し、金型内に充填された樹脂を冷却、固化させて成形されるものである。業務用空調機に用いられる送風用のファンは、このように樹脂を成形したものが多く使用されている。図１に送風ファン１とモータ２とを金属単体ボス８により連結した正面図とＡ−Ａ断面図を示す。一般的に送風ファン１の中央部に設けられた段付き形状の金属単体ボス８にモータ２の回転軸４を挿入し、モータが発生したトルクは回転軸４と送風ファンの接合部を介し、送風ファン１を駆動する。 Resin parts are mainly molded by injecting a resin melted at a high temperature into a mold at a high pressure, and cooling and solidifying the resin filled in the mold. As a blower fan used in a commercial air conditioner, a resin molded resin is often used. FIG. 1 shows a front view in which the blower fan 1 and the motor 2 are connected by a single metal boss 8 and an AA cross-sectional view. Generally, the rotating shaft 4 of the motor 2 is inserted into a stepped metal unit boss 8 provided at the center of the blower fan 1, and the torque generated by the motor passes through the joint between the rotary shaft 4 and the blower fan, The blower fan 1 is driven.
送風ファンのような回転体の射出成形方法について、従来たとえば、特許文献１に示すような方法が開示されている。この特許文献１においては「中心に環状金属部材５を備えた回転体１１を形成するためのキャビティ１０を複数の金型によって構成し、このキャビティ１０の軸心部に環状金属部材５が外嵌する軸部４１と、環状のフィルムゲート９を形成するフランジ部４２とを有するボス金型４を配置し、軸部４１によって環状金属部材５を保持するとともに、フランジ部４２と金型との間で環状金属部材５を挟み込んだ状態で、フィルムゲート９からキャビティ１０に溶融樹脂を注入し、キャビティ１０に注入された樹脂を所定圧力下で硬化させる際に、フランジ部４２をランナー側に移動させフィルムゲート９を遮断することによって、回転体１１とランナー８とを分離し、樹脂硬化後に複数の金型を開く。」と記載されている（要約参照）。 Conventionally, for example, a method as disclosed in Patent Document 1 has been disclosed as an injection molding method for a rotating body such as a blower fan. In Patent Document 1, “a cavity 10 for forming a rotating body 11 having an annular metal member 5 at its center is formed by a plurality of molds, and the annular metal member 5 is fitted on the axial center portion of the cavity 10. A boss die 4 having a shaft portion 41 to be formed and a flange portion 42 forming an annular film gate 9 is disposed, and the annular metal member 5 is held by the shaft portion 41, and between the flange portion 42 and the die. In the state where the annular metal member 5 is sandwiched, the molten resin is injected from the film gate 9 into the cavity 10, and when the resin injected into the cavity 10 is cured under a predetermined pressure, the flange portion 42 is moved to the runner side. By shutting off the film gate 9, the rotating body 11 and the runner 8 are separated, and a plurality of molds are opened after the resin is cured "(see summary).
特許文献１のような回転体は、モータ等の回転電機によって駆動されると、運転時にモータに発生する振動が回転体に直接伝達し、回転体が振動する現象が起こる。これにより回転体の静音性、寿命などに影響を及ぼす場合があるが、この点について特許文献１には何ら示されていない。 When a rotating body such as Patent Document 1 is driven by a rotating electrical machine such as a motor, the vibration generated in the motor during operation is directly transmitted to the rotating body, causing a phenomenon in which the rotating body vibrates. This may affect the quietness and life of the rotating body, but this point does not show anything in Patent Document 1.
図２は、この振動を考慮して、金属部５と、回転軸４を接合する金属部７と、これらの金属部の間にインサートされたゴム部６とにより樹脂部と接合するボス部として一体成形されたゴム付きボス９を構成したものである。このゴム部６により、モータに発生した振動をボスのゴム部６により吸収し、たとえば送風ファン等の回転体の振動を抑制する効果がある。 In view of this vibration, FIG. 2 shows a boss part joined to the resin part by the metal part 5, the metal part 7 that joins the rotating shaft 4, and the rubber part 6 inserted between these metal parts. The integrally formed rubber boss 9 is configured. The rubber portion 6 absorbs vibration generated in the motor by the rubber portion 6 of the boss, and has an effect of suppressing vibration of a rotating body such as a blower fan.
しかし、回転体の射出成形をする際に高温・高圧の樹脂がゴム付きボス９のランナー側の面１８を通過する際に、ゴム付きボス９のゴム部６と接触してしまうとゴム部６の変形及び劣化を招く虞がある。 However, if the high temperature and high pressure resin passes through the runner side surface 18 of the rubber boss 9 during the injection molding of the rotating body, the rubber portion 6 will come into contact with the rubber portion 6 of the rubber boss 9. There is a risk of causing deformation and deterioration.
そこで本発明は、回転体中央部に設けたボス部（固定部)を金属部とゴム部（弾性部)とにより構成すること、上記した回転体の振動を抑制しつつ、さらに、回転体の射出成形をする際に高温・高圧の樹脂を流す場合において、樹脂とゴム部（弾性部)とが接触することによる変形及び劣化を抑制することを目的とする。 Therefore, the present invention is configured such that the boss portion (fixed portion) provided in the central portion of the rotating body is constituted by a metal portion and a rubber portion (elastic portion), and further, while suppressing the vibration of the rotating body, An object of the present invention is to suppress deformation and deterioration due to contact between a resin and a rubber part (elastic part) when flowing high temperature and high pressure resin during injection molding.
上記課題を解決するために、例えば特許請求の範囲に記載の構成を採用する。
本願は上記課題を解決する手段を複数含んでいるが、その一例を挙げるならば、「ランナー部を介して樹脂を金型に流すことにより、回転軸により回転する回転体の射出成形を行う射出成形方法において、前記回転体は、該回転体の回転軸方向断面の中央部に設けられ、前記回転軸を内部に通すことにより、前記回転軸を前記回転体に固定するための固定部が設けられ、該固定部は、金属部と弾性部とから構成され、該固定部の前記回転軸を通すための孔部に隔離部が挿入されることで、該隔離部は前記ランナー部と前記弾性部とが接触しないように隔離し、前記隔離部は、前記固定部の前記孔部の内径検査ゲージ機能を有することにより、専用内径検査ゲージによる検査工程を不要とした」を特徴とするものである。
In order to solve the above problems, for example, the configuration described in the claims is adopted.
The present application includes a plurality of means for solving the above-mentioned problems. For example, “injection that performs injection molding of a rotating body that rotates around a rotating shaft by flowing resin through a runner portion into a mold. In the molding method, the rotating body is provided at a central portion of the rotating shaft direction cross section of the rotating body, and a fixing portion is provided for fixing the rotating shaft to the rotating body by passing the rotating shaft through the inside. The fixing part is composed of a metal part and an elastic part, and the isolating part is inserted into a hole part through which the rotating shaft of the fixing part is passed, so that the isolating part is provided with the runner part and the elastic part. It is isolated so that it does not come into contact with the portion, and the separation portion has an inner diameter inspection gauge function of the hole portion of the fixed portion, thereby eliminating the need for an inspection process using a dedicated inner diameter inspection gauge. '' is there.
本発明によれば、ランナーをボスに内臓されたゴムとの直接接触を回避できる。ランナーを成形品中央に配置することが可能となり、成形品のバランスを維持とランナーの最小化を実現できる。ボスをインサートする際に内径検査ができるため、検査ゲージ及び検査工数を削減することができる。 According to the present invention, it is possible to avoid direct contact of the runner with the rubber built in the boss. The runner can be placed in the center of the molded product, and the balance of the molded product can be maintained and the runner can be minimized. Since the inner diameter can be inspected when the boss is inserted, the inspection gauge and the inspection man-hour can be reduced.
上記した以外の課題、構成及び効果は、以下の実施形態の説明により明らかにされる。 Problems, configurations, and effects other than those described above will be clarified by the following description of embodiments.
以下、本発明の実施例について図面を用いて説明する。 Embodiments of the present invention will be described below with reference to the drawings.
図１は送風ファン１とモータ２の回転軸４とを金属単体ボス８により連結した正面図とＡ−Ａ断面図を示す。本図のように、モータ２の回転軸４を送風ファン１の中央にある金属単体ボス８に挿入し、連結するような構造となる。この金属単体ボス８というインサート部品を使用することで強度アップを図るものである。また、金属単体であることにより高温・高圧の樹脂が射出成形の際に金属単体ボス８と接触しても変形することがないというメリットもある。送風ファン１は段付き形状の金属単体ボス８が射出成形時に金型にインサートされ、次に樹脂を射出する方法で金属単体ボス８と送風ファンの樹脂部分を一体したものである。 FIG. 1 shows a front view in which the blower fan 1 and the rotating shaft 4 of the motor 2 are connected by a single metal boss 8 and a cross-sectional view taken along line AA. As shown in this figure, the rotating shaft 4 of the motor 2 is inserted into the metal single boss 8 at the center of the blower fan 1 and connected. The strength is increased by using an insert part called the metal simple boss 8. Further, since it is a single metal, there is a merit that high temperature and high pressure resin does not deform even when it comes into contact with the single metal boss 8 during injection molding. The blower fan 1 is obtained by integrating a single metal boss 8 and a resin part of the blower fan by a method in which a stepped metal single piece boss 8 is inserted into a mold during injection molding, and then a resin is injected.
しかし、このような場合には上記したように、回転軸４と送風ファン１の接合部に大きなトルクが発生するため、樹脂である送風ファン１の接合部は強度と耐久性が劣ることから、磨耗や変形が生じる場合がある。つまり、送風ファン１とモータ２は機械的に接合されているため、運転時にモータ２に発生する振動は送風ファン１に直接伝達し、送風ファン１が振動する現象が起こる。すると送風ファン１の送風効率や静音性及び寿命などに影響を及ぼす場合がある。 However, in such a case, as described above, since a large torque is generated at the joint between the rotating shaft 4 and the blower fan 1, the joint of the blower fan 1 that is resin is inferior in strength and durability. Wear and deformation may occur. That is, since the blower fan 1 and the motor 2 are mechanically joined, vibration generated in the motor 2 during operation is directly transmitted to the blower fan 1, and a phenomenon that the blower fan 1 vibrates occurs. Then, the blowing efficiency, silence and life of the blower fan 1 may be affected.
図２は、段付き形状のゴムと金属一体成形されたゴム付きボス９の正面図とＢ−Ｂ断面図を示す。図２に示すゴム付きボス９は、送風ファン１の樹脂部と接合する金属部５と回転軸４と接合する金属部７と、これらの金属部の間にインサートされたゴム部６とが一体となって構成され、段付き形状となっている。このゴム部６により、モータ２に発生した振動がボスのゴム部６に吸収され、送風ファン１の振動を抑制することができる。 FIG. 2 shows a front view and a B-B cross-sectional view of a rubber boss 9 integrally molded with a stepped rubber and metal. The boss 9 with rubber shown in FIG. 2 has a metal part 5 joined to the resin part of the blower fan 1, a metal part 7 joined to the rotating shaft 4, and a rubber part 6 inserted between these metal parts. It becomes and becomes a stepped shape. By the rubber part 6, vibration generated in the motor 2 is absorbed by the rubber part 6 of the boss, and vibration of the blower fan 1 can be suppressed.
ここで、回転軸４を確実に段付き形状のゴム付きボス９に挿入できるようにするため、ゴム付きボス９の金属部７の内径aは一定の公差となるように定められている。この公差となるようにするために、一般的にはゴム付きボス９を金型にインサートする前に、図３に示しているような専用のゲージによりゴム付きボス９の内径検査を行う必要があり、検査工数の増加を招いている。 Here, in order to ensure that the rotating shaft 4 can be inserted into the stepped rubber boss 9, the inner diameter a of the metal portion 7 of the rubber boss 9 is determined to have a certain tolerance. In order to achieve this tolerance, it is generally necessary to inspect the inner diameter of the rubber boss 9 with a dedicated gauge as shown in FIG. 3 before inserting the rubber boss 9 into the mold. There is an increase in inspection man-hours.
ここで、金属製ボス８を使用した送風ファンにおける射出成形について説明する。
図４に示すように、射出成形機から送られる樹脂は送風ファン１の樹脂部までのルートであるランナー１０により金型に送られる。このランナー１０は図４に示すように送風ファン１の中央部に配置される。この場合は、射出成形機からの樹脂が金属製ボス８のランナー側の面１８に経由し、送風ファン１の樹脂部３に到達する構造である。この構造のメリットはランナー部分が小さく、また、樹脂が送風ファン１０の中央部から均等に流れるため、送風ファン１のアンバランス量が小さくなる。
Here, the injection molding in the blower fan using the metal boss 8 will be described.
As shown in FIG. 4, the resin sent from the injection molding machine is sent to the mold by a runner 10 that is a route to the resin portion of the blower fan 1. As shown in FIG. 4, the runner 10 is disposed at the center of the blower fan 1. In this case, the resin from the injection molding machine reaches the resin portion 3 of the blower fan 1 via the runner side surface 18 of the metal boss 8. The merit of this structure is that the runner portion is small and the resin flows evenly from the central portion of the blower fan 10, so that the unbalance amount of the blower fan 1 is small.
一方、図２で示したゴムと金属一体成形されたゴム付きボス９を使用する場合、図４で示したような送風ファン１の樹脂部３とランナー１０との配置とすると、図５に示しているように、送風ファン１の中央部に配置するランナー１０は射出成形時に高温・高圧となっており、この高温・高圧の樹脂がゴム付きボス９のランナー側の面１８を通過する際、ゴム付きボス９のゴム部６と接触してしまうため、これによりゴム部６の変形及び劣化を招く虞がある。 On the other hand, when using the rubber boss 9 integrally molded with the rubber shown in FIG. 2, the arrangement of the resin part 3 and the runner 10 of the blower fan 1 as shown in FIG. As shown, the runner 10 disposed in the central portion of the blower fan 1 has a high temperature and a high pressure at the time of injection molding, and when this high temperature and high pressure resin passes through the runner side surface 18 of the rubberized boss 9, Since it will contact with the rubber part 6 of the boss 9 with rubber, this may cause deformation and deterioration of the rubber part 6.
図６にゴム付きボス９から外れた位置に１本だけランナー１１を配置した送風ファンの正面図とＦ−Ｆ断面図を示す。この場合は送風ファン１の中央から外れた位置に、一本のランナー１１が配置されているため、ランナー１１とゴム付きボス９のゴム部６との接触は回避できるが、樹脂が送風ファン１に不均等的に流れることにより、送風ファン１のアンバランス量が大きくなる傾向が高く、品質を安定させることが難しい。 FIG. 6 shows a front view and an F-F cross-sectional view of a blower fan in which only one runner 11 is disposed at a position removed from the rubber-equipped boss 9. In this case, since one runner 11 is arranged at a position off the center of the blower fan 1, contact between the runner 11 and the rubber part 6 of the rubber-equipped boss 9 can be avoided, but the resin is blown fan 1. If the flow is uneven, the unbalance amount of the blower fan 1 tends to increase, and it is difficult to stabilize the quality.
図７にピンポイントゲートを配置した送風ファン１の正面図とＦ−Ｆ断面図を示す。この場合は樹脂が送風ファン１の中央を基準とした複数のピンポイントゲートのランナー１２から送風ファン１に均等に流すことができるため、送風ファン１のアンバランス量は小さくすることができる。しかし、この場合のランナー１２はランナー１０とランナー１１より大きいため、成形に必要な樹脂材料が多くなり、またランナー１２は成形後に成形品（送風ファン）と分離し、廃棄する必要があるため、送風ファンの中央を基準として複数配置したピンポイントゲートのランナー１２を採用する場合の生産コストが高くなる。 FIG. 7 shows a front view and an F-F cross-sectional view of the blower fan 1 in which a pinpoint gate is arranged. In this case, since the resin can flow evenly from the plurality of pinpoint gate runners 12 with respect to the center of the blower fan 1 to the blower fan 1, the unbalance amount of the blower fan 1 can be reduced. However, since the runner 12 in this case is larger than the runner 10 and the runner 11, more resin material is required for molding, and the runner 12 needs to be separated from the molded product (fan) after molding and discarded. The production cost in the case of employing a plurality of pinpoint gate runners 12 arranged with respect to the center of the blower fan becomes high.
このため、ゴム付きボス９を使用する送風ファン１のランナーを中央部に配置してコスト高を抑えながら、さらにゴム付きボス９のゴム部６の変形及び劣化を防止させることが重要となる。 For this reason, it becomes important to prevent the deformation | transformation and deterioration of the rubber part 6 of the boss | hub 9 with rubber | gum, arrange | positioning the runner of the ventilation fan 1 which uses the boss | hub 9 with rubber | gum by suppressing a cost increase.
図８にランナー１３を中央に配置したゴム付きボス９を使用した送風ファン１とＨ−Ｈ断面図を示す。
また、図９にゴム付きボス９と樹脂とを隔離する隔離部材１４の正面図とＨ−Ｈ断面図を示す。ゴム付きボス９を樹脂から隔離する隔離部材１４は太い円周部１５と細い円周部１６に構成される。隔離部材１４はゴム付きボス９に組付けて金型にインサートされる。ゴム付きボス９の面１８に隔離部材１４の太い円周部１５が被せられ、隔離部材１４の太い円周部１５の外径ｇがゴム付きボス９のゴム部６の径ｃより大きいため、ランナー１３及びランナー１３から流れる高温・高圧の樹脂がゴム部６に流れるのを防止し、ゴムと樹脂の接触を防ぐことができる。
FIG. 8 shows a blower fan 1 using a rubber-equipped boss 9 with a runner 13 disposed in the center and a cross-sectional view of HH.
FIG. 9 shows a front view and a HH cross-sectional view of the separating member 14 that separates the rubber boss 9 from the resin. The separating member 14 for isolating the rubber-equipped boss 9 from the resin is composed of a thick circumferential portion 15 and a thin circumferential portion 16. The isolation member 14 is assembled to the rubber boss 9 and inserted into the mold. The surface 18 of the rubber boss 9 is covered with the thick circumferential portion 15 of the separating member 14, and the outer diameter g of the thick circumferential portion 15 of the separating member 14 is larger than the diameter c of the rubber portion 6 of the rubber boss 9. It is possible to prevent the runner 13 and the high-temperature / high-pressure resin flowing from the runner 13 from flowing into the rubber portion 6, thereby preventing contact between the rubber and the resin.
すなわち、本実施例では、ランナー部（ランナー１３）を介して樹脂を金型に流すことにより、回転軸４により回転する回転体（送風ファン１）の射出成形を行う射出成形方法において、回転体（送風ファン１）は、該回転体（送風ファン１）の回転軸４方向断面の中央部に設けられ、回転軸４を内部に通すことにより、回転軸４を回転体（送風ファン１）に固定するための固定部（ゴム付きボス９）が設けられる。そして、固定部（ゴム付きボス９）は、金属部（５、７）と弾性部（ゴム部６)とから構成され、該固定部（ゴム付きボス９）の回転軸４を通すための孔部に隔離部（隔離部材１４）が挿入されることで、該隔離部（隔離部材１４）はランナー部（ランナー１３）と弾性部（ゴム部６)とが接触しないように隔離するものである。また固定部（ゴム付きボス９）は、金属部７により回転軸４を固定するとともに金属部７を外周側から覆うように弾性体（ゴム部６)が配置される。 That is, in this embodiment, in the injection molding method for performing the injection molding of the rotating body (blower fan 1) rotated by the rotating shaft 4 by flowing resin through the runner part (runner 13), the rotating body. (Blower fan 1) is provided at the center of the cross section in the direction of the rotating shaft 4 of the rotating body (air blowing fan 1), and passes the rotating shaft 4 into the rotating body 4 to the rotating body (air blowing fan 1). A fixing portion (rubber boss 9) for fixing is provided. The fixed part (rubber boss 9) is composed of metal parts (5, 7) and an elastic part (rubber part 6), and a hole for passing the rotating shaft 4 of the fixed part (rubber boss 9). By inserting the isolation part (isolation member 14) into the part, the isolation part (isolation member 14) isolates the runner part (runner 13) and the elastic part (rubber part 6) from contacting each other. . The fixing portion (rubber boss 9) has an elastic body (rubber portion 6) disposed so as to fix the rotating shaft 4 by the metal portion 7 and to cover the metal portion 7 from the outer peripheral side.
本実施例のこの構造によれば、樹脂が図４に示した構造と同じように流れるため、アンバランス量が小さい送風ファン１を成形できる。且つ、ランナーが小さいため、成形に必要な樹脂材料が少なく、生産コストの削減が実現できる。 According to this structure of the present embodiment, since the resin flows in the same manner as the structure shown in FIG. 4, the blower fan 1 with a small unbalance amount can be formed. And since a runner is small, there are few resin materials required for shaping | molding, and reduction of production cost is realizable.
なお隔離部（隔離部材１４）は、固定部（ゴム付きボス９）の孔部の内径検査ゲージ機能を有することにより、専用内径検査ゲージによる検査工程を不要とすることができる。つまり、細い円周部１６の直径はボス内径検査ゲージに必要な寸法に指定されており、ゴム付きボス９に挿入する際にゴム付きボス９の内径を検査することができる。このため、内径検査ゲージの製作と検査工数の削減ができ、生産コストと生産工数の削減が実現できる。また、ボス内径検査において、専用ケージによる検査を不要とすることが可能となる。 The isolation part (isolation member 14) has an inner diameter inspection gauge function of the hole of the fixed part (rubber boss 9), thereby eliminating the need for an inspection process using a dedicated inner diameter inspection gauge. That is, the diameter of the thin circumferential portion 16 is specified as a necessary dimension for the boss inner diameter inspection gauge, and the inner diameter of the rubber-equipped boss 9 can be inspected when inserted into the rubber-equipped boss 9. For this reason, it is possible to manufacture the inner diameter inspection gauge and reduce the inspection man-hour, and it is possible to reduce the production cost and the man-hour. In addition, in the boss inner diameter inspection, it is possible to eliminate the need for an inspection with a dedicated cage.
次に、本発明の実施例２に係る多種類ボスのインサート成形方法や金型構造について説明する。なお、上記実施例１と同様の機能の構成要素には同符号を付してその説明は省略する。送風ファンの翼形状が同じ場合は、段付き形状の金属単体ボス８と段付き形状のゴムと金属一体成形されたボス９の２種類或いはその他の形状及び材質のボスを使用する場合がある。図１０に段付きの形状ないボスの正面図とＩ−Ｉ断面図を示す。この段付き形状のないボス１７は段付き形状の金属単体ボス８と段付き形状のゴムと金属一体成形されたボス９とともに、ボスの１例である。一般的に、送風ファンの翼形状が同じにしても、ボスの形状や材質が異なるため、それぞれのボスに応じて、専用の金型が必要である。しかし、この場合は金型の製作費用が多く必要となる。また、複数の金型を使用した場合には金型の取替えが必要となるため、生産工数が多くなる。このため、１つ金型で多種類のボスを対応できることが課題となる。そこで、１つ金型で多種類のボスを対応できる方法について以下説明する。 Next, a multi-type boss insert molding method and mold structure according to Embodiment 2 of the present invention will be described. In addition, the same code | symbol is attached | subjected to the component of the function similar to the said Example 1, and the description is abbreviate | omitted. When the blade shape of the blower fan is the same, there may be used bosses of two kinds or other shapes and materials, that is, a single metal boss 8 with a stepped shape, a rubber with a stepped shape and a boss 9 integrally formed with metal. FIG. 10 shows a front view and a II sectional view of a boss having no stepped shape. The boss 17 having no stepped shape is an example of a boss together with a stepped metal single body boss 8 and a stepped shape rubber and a metal boss 9 integrally formed with metal. In general, even if the blade shape of the blower fan is the same, the shape and material of the boss are different, and therefore a dedicated mold is required for each boss. However, in this case, a lot of mold production costs are required. In addition, when a plurality of dies are used, it is necessary to replace the dies, which increases the number of production steps. For this reason, it becomes a subject to be able to cope with many kinds of bosses with one die. Therefore, a method capable of handling various types of bosses with one mold will be described below.
まず、段付き形状の金属単体ボスとボス８と段付き形状のゴムと金属一体成形されたボス９の場合について、２種類のボスは相似形状であり、且つ、外径寸法が同寸法である。その違いは発明が解決しようとする課題に述べたように、段付き形状の金属単体ボス８は金属の一体ものであり、段付き形状のゴムと金属一体成形されたボス９は金属とゴムを一体化したものである。この場合は、図８に示している構造を使用すれば、ランナーは送風ファンの中央に配置しても、樹脂とボスのゴム部６との接触がなく、１つ金型で２種類のボスを対応することができる。 First, in the case of a stepped metal single piece boss and a boss 8 and a stepped shape rubber and metal integrally formed boss 9, the two types of bosses are similar in shape and have the same outer diameter. . As described in the problem to be solved by the invention, the difference is that the stepped-shaped single metal boss 8 is an integral piece of metal, and the stepped-shaped rubber and the metal-integrated boss 9 are made of metal and rubber. It is an integrated one. In this case, if the structure shown in FIG. 8 is used, even if the runner is arranged in the center of the blower fan, there is no contact between the resin and the rubber part 6 of the boss, and two types of bosses are formed with one mold. Can respond.
また、段付き形状ないボス１７は段付き形状の金属単体ボスとボス８と段付き形状のゴムと金属一体成形されたボス９の形状が異なる場合、段付き形状ないボス１７の外径と段付き形状の金属単体ボスとボス８と段付き形状のゴムと金属一体成形されたボス９の樹脂部と接合する金属部の外径bは同じ寸法であれば、図１１に示しているような構造を採用することで、成形ができる。 Further, when the stepped shape boss 17 is different from the shape of the stepped shape metal single boss, the boss 8, the stepped shape rubber and the metal integrally formed boss 9, the outer diameter and step size of the stepped shape boss 17 are different. If the outer diameter b of the metal part to be joined to the resin part of the boss 9 formed integrally with the metal boss, the boss 8, the rubber having the stepped shape, and the metal integrally formed is as shown in FIG. By adopting the structure, it can be molded.
実施例１に述べたように、ランナーが中央に配置することができるとともに、多種類のボスを対応することもできる。また、ボスフタをボス内径検査ゲージ機能を持たせることで、多種類のボスにしても、内径検査することができる。 As described in the first embodiment, the runner can be arranged in the center, and various types of bosses can be handled. Also, by providing the boss cover with a boss inner diameter inspection gauge function, it is possible to inspect the inner diameter even for various types of bosses.
以上、射出成形において、送風ファンのボスをインサート成形を対象とした成形方法と金型構造を説明するが、本発明はこれに限定されず、他のインサート成形に対しても同様に適用可能である。 As described above, in the injection molding, the molding method and mold structure for the boss of the blower fan for insert molding will be described, but the present invention is not limited to this, and can be similarly applied to other insert molding. is there.
１ 送風ファン
２ モータ
３ 送風ファンの樹脂部
４ 回転軸
５ 送風ファンの樹脂部と接合するゴム付きボスの金属部
６ ゴム付きボスのゴム部
７ 回転軸４と接合するゴム付きボスの金属部
８ 金属単体ボス
９ ゴム付きボス
１０ 送風ファンの中央部に配置するランナー
１１ 送風ファンの中央ら外れた位置に配置する一本ランナー
１２ 送風ファンの中央に基準した複数ピンポイントゲートのランナー
１３ 送風ファンの中央部にボスと樹脂の隔離部材に経由するランナー
１４ ボスと樹脂を隔離する部材
１５ １４の太い円周部
１６ １４の細い円周部
１７ 段付き形状ないボス
１８ ボスのランナー側の面
１９ ９の内径a
２０ ９の樹脂部と接合する金属部の外径b
２１ ９のゴム部の外径ｃ
２２ ９のモータ回転軸を接合する金属部の外径ｄ
２３ ボス内径検査ゲージの外径e
２４ １６の外径f
２５ １５の外径g
２６ １７の内径ｈ
２７ １７の内径i
DESCRIPTION OF SYMBOLS 1 Blower fan 2 Motor 3 Blast fan resin part 4 Rotating shaft 5 Rubber part of rubber boss metal part joined to resin part of blower fan 6 Rubber part of rubber boss part 7 Metal part of rubber boss part joined to rotary axis 4 Metal boss 9 Rubber boss 10 Runner placed at the center of the blower fan 11 Single runner placed at a position off the center of the blower fan 12 Multiple pinpoint gate runners based on the center of the blower fan 13 Runner via the boss and resin separating member in the central portion 14 Member separating the boss and resin 15 14 Thick circumferential portion 16 14 Thin circumferential portion 17 Stepped boss 18 Boss runner side surface 19 9 Inner diameter a
The outer diameter b of the metal part joined to the resin part of 209
219 rubber outer diameter c
The outer diameter d of the metal part joining the motor rotation shaft of 229
23 Outer diameter of boss inner diameter inspection gauge
24 16 outer diameter f
25 15 outer diameter g
26 17 Inner diameter h
27 17 Inner diameter i
Claims (3)
前記回転体は、該回転体の回転軸方向断面の中央部に設けられ、前記回転軸を内部に通すことにより、前記回転軸を前記回転体に固定するための固定部が設けられ、
該固定部は、金属部と弾性部とから構成され、
該固定部の前記回転軸を通すための孔部に隔離部が挿入されることで、該隔離部は前記ランナー部と前記弾性部とが接触しないように隔離し、
前記隔離部は、前記固定部の前記孔部の内径検査ゲージ機能を有することにより、専用内径検査ゲージによる検査工程を不要としたことを特徴とする射出成形方法。 In an injection molding method of performing injection molding of a rotating body that rotates by a rotating shaft by flowing resin through a runner part into a mold,
The rotating body is provided at a central portion of the rotating shaft direction cross section of the rotating body, and a fixing portion is provided for fixing the rotating shaft to the rotating body by passing the rotating shaft inside.
The fixed part is composed of a metal part and an elastic part,
By inserting the isolation part into the hole for passing the rotating shaft of the fixed part, the isolation part is isolated so that the runner part and the elastic part do not contact ,
The said isolation | separation part has the internal diameter inspection gauge function of the said hole of the said fixing | fixed part, The inspection process by a dedicated internal diameter inspection gauge becomes unnecessary, The injection molding method characterized by the above-mentioned.
前記回転体は送風ファンであることを特徴とする射出成形方法。 The injection molding method according to claim 1,
An injection molding method, wherein the rotating body is a blower fan.
前記固定部は、前記金属部により前記回転軸を固定するとともに前記金属部を外周側から覆うように前記弾性体が配置されることを特徴とする射出成形方法。 The injection molding method according to claim 1,
The said fixing | fixed part fixes the said rotating shaft with the said metal part, and the said elastic body is arrange | positioned so that the said metal part may be covered from an outer peripheral side, The injection molding method characterized by the above-mentioned.
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| JPH09228993A (en) * | 1996-02-26 | 1997-09-02 | Mitsubishi Heavy Ind Ltd | Propeller fan |
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