JPH08159091A - Turbo fan and its injection molding method - Google Patents
Turbo fan and its injection molding methodInfo
- Publication number
- JPH08159091A JPH08159091A JP33470194A JP33470194A JPH08159091A JP H08159091 A JPH08159091 A JP H08159091A JP 33470194 A JP33470194 A JP 33470194A JP 33470194 A JP33470194 A JP 33470194A JP H08159091 A JPH08159091 A JP H08159091A
- Authority
- JP
- Japan
- Prior art keywords
- blade
- turbofan
- mold
- resin
- molding method
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C45/00—Injection moulding, i.e. forcing the required volume of moulding material through a nozzle into a closed mould; Apparatus therefor
- B29C45/17—Component parts, details or accessories; Auxiliary operations
- B29C45/1703—Introducing an auxiliary fluid into the mould
- B29C45/1704—Introducing an auxiliary fluid into the mould the fluid being introduced into the interior of the injected material which is still in a molten state, e.g. for producing hollow articles
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29K—INDEXING SCHEME ASSOCIATED WITH SUBCLASSES B29B, B29C OR B29D, RELATING TO MOULDING MATERIALS OR TO MATERIALS FOR MOULDS, REINFORCEMENTS, FILLERS OR PREFORMED PARTS, e.g. INSERTS
- B29K2101/00—Use of unspecified macromolecular compounds as moulding material
- B29K2101/10—Thermosetting resins
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29L—INDEXING SCHEME ASSOCIATED WITH SUBCLASS B29C, RELATING TO PARTICULAR ARTICLES
- B29L2031/00—Other particular articles
- B29L2031/08—Blades for rotors, stators, fans, turbines or the like, e.g. screw propellers
- B29L2031/087—Propellers
Landscapes
- Engineering & Computer Science (AREA)
- Manufacturing & Machinery (AREA)
- Mechanical Engineering (AREA)
- Structures Of Non-Positive Displacement Pumps (AREA)
Abstract
Description
【０００１】[0001]
【産業上の利用分野】この発明は、空調機等に使用され
るターボファンの射出成形方法及びそのターボファンに
関するものである。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an injection molding method for a turbo fan used in an air conditioner and the like, and a turbo fan therefor.
【０００２】[0002]
【従来の技術】空調機等に使用されるターボファンで
は、低コスト化あるいは回転駆動の効率化等の観点か
ら、軽量化を図ることが要求されている。そのため、従
来は加熱溶融した熱可塑性樹脂をパイプ状あるいは２枚
のシート状に金型に押出し、ダイスの中央から空気を吹
込んで樹脂を金型に密着させ内部を中空に成形する中空
成形法や、あるいはブタン、ペンタン、ヘキサン等のよ
うな樹脂をほとんど溶かさない揮撥性の強い液体を樹脂
の成形ペレットに混入したものを成形材料とする発泡成
形法等の低圧成形法を利用して、ターボファンの軽量化
が図られてきた。また、通常の成形法によるものとして
は、実開平４−１１６６９８号公報記載のターボファン
のように、ブレードと主板との角隅部にコーナＲを設
け、このコーナＲの肉厚を均一とすることよって一対の
コーナＲの間に凹所を設けて樹脂材料の減少を図るもの
があった。2. Description of the Related Art A turbofan used in an air conditioner or the like is required to be light in weight from the viewpoints of cost reduction and rotational drive efficiency. Therefore, conventionally, a hollow molding method in which a heat-melted thermoplastic resin is extruded into a pipe or two sheets into a mold and air is blown from the center of the die to bring the resin into close contact with the mold to form a hollow inside, Alternatively, by using a low-pressure molding method such as a foaming molding method in which a molding material is a mixture of a highly volatile liquid that hardly dissolves a resin such as butane, pentane, hexane, etc. The weight of the fan has been reduced. Further, as a conventional molding method, like the turbofan described in Japanese Utility Model Laid-Open No. 4-1166698, a corner R is provided at the corner between the blade and the main plate, and the thickness of the corner R is made uniform. Therefore, there has been an attempt to reduce the amount of resin material by providing a recess between the pair of corners R.
【０００３】[0003]
【発明が解決しようとする課題】ところで主板１２とブ
レード１１とが一体成形されたターボファン（図２参
照）においては、その成形時にブレード１１が成形品の
厚肉部となる。そのため金型内での樹脂の流動性が均一
とならず、上記従来の低圧成形法では樹脂流入時にブレ
ード１１に樹脂が先に流れ込み、従ってショートショッ
ト法での軽量化は困難で、成形に時間がかかるという問
題があった。By the way, in a turbofan (see FIG. 2) in which the main plate 12 and the blade 11 are integrally molded, the blade 11 becomes a thick portion of the molded product at the time of molding. Therefore, the fluidity of the resin in the mold is not uniform, and in the above-mentioned conventional low-pressure molding method, the resin first flows into the blade 11 at the time of resin inflow, and therefore it is difficult to reduce the weight by the short shot method, and the molding time is long. There was a problem that it took.
【０００４】また、通常の射出成形法において、成形品
の厚肉部であるブレード１１に肉ヌスミを設けてその軽
量化を図ろうとすれば、上記実開平４−１１６６９８号
公報記載のターボファンのように、金型強度上の問題か
らブレード１１の根元部に凹所を設ける程度が限界とな
り、軽量化が十分に図れないという問題があった。Further, in an ordinary injection molding method, if the blade 11 which is a thick portion of a molded product is provided with a slim body to reduce its weight, the turbofan of the above-mentioned Japanese Utility Model Laid-Open No. 4-1166698 is disclosed. As described above, due to the problem of mold strength, the extent to which a recess is provided at the base of the blade 11 is limited, and there is a problem that weight reduction cannot be achieved sufficiently.
【０００５】この発明は、上記従来の欠点を解決するた
めになされたものであって、その目的は、成形時間を短
縮して生産性を向上することが可能であると共に、成形
品の軽量化を図ることが可能なターボファンの射出成形
方法及びターボファンを提供することにある。The present invention has been made to solve the above-mentioned conventional drawbacks, and an object thereof is to shorten the molding time to improve the productivity and to reduce the weight of the molded product. An object of the present invention is to provide a turbofan injection molding method and a turbofan capable of achieving the above.
【０００６】そこで請求項１のターボファンの射出成形
方法及びターボファンは、主板１２とブレード１１とが
熱可塑性樹脂で一体成形されるターボファンの射出成形
方法において、ブレード１１に肉ヌスミ７を設けるため
に金型１に突出部３を設け、ブレード１１の上記肉ヌス
ミ７より先端側は圧入ガス６により中空成形することを
特徴としている。Therefore, in the turbofan injection molding method and the turbofan according to claim 1, in the turbofan injection molding method in which the main plate 12 and the blade 11 are integrally molded of a thermoplastic resin, the blade 11 is provided with the meat slime 7. For this purpose, a protrusion 3 is provided on the die 1, and the blade 11 is hollow-molded with a press-fitting gas 6 on the tip side of the meat slack 7.
【０００７】また請求項２のターボファンの射出成形方
法及びターボファンは、上記肉ヌスミ７の深さは、ブレ
ード１１の高さの約１／２〜約２／３としたことを特徴
としている。The turbofan injection molding method and the turbofan according to the second aspect are characterized in that the depth of the meat slime 7 is about 1/2 to about 2/3 of the height of the blade 11. .
【０００８】さらに請求項３のターボファンの射出成形
方法及びターボファンは、主板１２とブレード１１とが
熱可塑性樹脂で一体成形されたターボファンにおいて、
ブレード１１に肉ヌスミ７を設け、ブレード１１の上記
肉ヌスミ７より先端側に、中空成形により形成された中
空部８を設けたことを特徴としている。Further, the turbofan injection molding method and the turbofan according to claim 3 are the turbofan in which the main plate 12 and the blade 11 are integrally molded with a thermoplastic resin,
It is characterized in that the blade 11 is provided with meat slack 7 and a hollow portion 8 formed by hollow molding is provided on the tip side of the blade 11 for the meat slack 7.
【０００９】[0009]
【作用】上記請求項１のターボファンの射出成形方法で
は、金型１に設けた突出部３によってブレード１１に肉
ヌスミ７を設け、この肉ヌスミ７より先端側は圧入ガス
６によって中空成形するようにしている。そのため、成
形品の厚肉部が減少して樹脂流入時の流動性が均一化
し、さらに圧入ガス６によってブレード１１の先端側の
樹脂が金型に確実に密着するので、保圧の必要性が低減
する。従って、成形時間を短縮して生産性の向上を図る
ことが可能となる。また、厚肉部の減少に伴って樹脂量
が減少するので、成形されたターボファンの軽量化を図
ることが可能となる。In the injection molding method of the turbofan according to the above-mentioned claim 1, the protrusion 3 provided on the die 1 is provided with the meat slack 7 on the blade 11, and the tip side of the meat slack 7 is hollow-molded by the press-fitting gas 6. I am trying. Therefore, the thick part of the molded product is reduced, the fluidity at the time of resin inflow is made uniform, and the resin on the tip side of the blade 11 is surely brought into close contact with the mold by the press-fitting gas 6. Reduce. Therefore, it becomes possible to shorten the molding time and improve the productivity. Moreover, since the amount of resin decreases as the number of thick portions decreases, it is possible to reduce the weight of the molded turbo fan.
【００１０】また請求項２のターボファンの射出成形方
法では、上記肉ヌスミ７の深さをブレード１１の高さの
約１／２〜約２／３としている。従って、中空成形され
るのはブレード１１の先端部のみとなるので、これに伴
うバラス効果やたれ下り現象による偏肉を低減でき、成
形されたターボファンの動バランスを安定なものとして
騒音特性等の基本性能を良好に維持することが可能とな
る。In the turbofan injection molding method according to the second aspect of the present invention, the depth of the meat slack 7 is set to about 1/2 to about 2/3 of the height of the blade 11. Therefore, since only the tip portion of the blade 11 is hollow-molded, it is possible to reduce unevenness due to the loosening effect and the sagging phenomenon that accompany this, and to stabilize the dynamic balance of the molded turbo fan so that noise characteristics, etc. It is possible to maintain good basic performance of.
【００１１】さらに請求項３のターボファンでは、ブレ
ード１１に肉ヌスミ７を設けると共に、これより先端側
には中空成形による中空部８を設けている。従って、樹
脂量を減少させて軽量化を図ることが可能であると共
に、動バランスが安定なため、騒音特性等の基本特性を
良好に維持することが可能となる。Further, in the turbofan according to the third aspect, the blade 11 is provided with the meat slack 7 and the hollow portion 8 formed by hollow molding is provided on the tip end side thereof. Therefore, it is possible to reduce the amount of resin and reduce the weight, and since the dynamic balance is stable, it is possible to maintain good basic characteristics such as noise characteristics.
【００１２】[0012]
【実施例】次に、この発明のターボファンの射出成形方
法及びターボファンの具体的な実施例について、図面を
参照しつつ詳細に説明する。DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Next, a concrete embodiment of a turbofan injection molding method and a turbofan according to the present invention will be described in detail with reference to the drawings.
【００１３】図２は、この発明のターボファンの一実施
例の構成を示し、同図（ｂ）はその上面図であり、同図
（ａ）はその側面およひ中央縦断面を示す図である。両
図において１２はブレード１１と熱可塑性樹脂で一体成
形された主板であり、その上面１２ａには７枚のブレー
ド１１が約５０°前後の間隔で設けられている。そして
これら各ブレード１１は、先端部１１ａが上記主板１２
の内周側に、後端部１１ｂが外周側にそれぞれ位置する
よう傾斜して配置されている。また、上記主板１２の中
心部にはコーン状の凸部１８が形成され、この凸部１８
を覆うように、上記一方の側面１２ａの上方からハブカ
バー１５がタッピング２１によって、上記主板１２に取
付けられている。さらに上記ハブカバー１５の中心部に
はボス１４が形成され、このボス１４には図示しないモ
ータのシャフトが固定されるようになっている。また、
図２において１３は側板であって、図における上方から
各ブレード１１に固定されている。なお、２２は主板１
２の周縁に設けられたバランスウェイトであり、主板１
２の下面１２ｂには主板１２を補強するための図示しな
いリブ等が設けられている。FIG. 2 shows the structure of an embodiment of the turbofan of the present invention. FIG. 2 (b) is a top view thereof, and FIG. 2 (a) is a side view and a central longitudinal section thereof. Is. In both figures, 12 is a main plate integrally formed with the blade 11 and thermoplastic resin, and seven blades 11 are provided on the upper surface 12a thereof at intervals of about 50 °. And, in each of these blades 11, the tip portion 11a has the above-mentioned main plate 12
The rear end portion 11b is arranged so as to be inclined on the inner peripheral side so as to be located on the outer peripheral side. Further, a cone-shaped convex portion 18 is formed at the center of the main plate 12, and the convex portion 18
The hub cover 15 is attached to the main plate 12 by tapping 21 from above the one side surface 12a so as to cover the main plate 12. Further, a boss 14 is formed at the center of the hub cover 15, and a motor shaft (not shown) is fixed to the boss 14. Also,
In FIG. 2, 13 is a side plate, which is fixed to each blade 11 from above in the figure. In addition, 22 is the main plate 1
2 is a balance weight provided on the periphery of the main plate 1
On the lower surface 12b of No. 2, ribs (not shown) for reinforcing the main plate 12 are provided.
【００１４】上記のように構成されたターボファンは、
図示しないモータによって図２（ｂ）に示す矢印Ｒの方
向に回転駆動される。この回転によって空気が吸込口１
６から軸方向に沿って吸込まれ、そしてブレード１１に
よって吹出口１７から遠心方向に吹出される。また、こ
のとき、上記ハブカバー１５は吸入空気の通路を形成
し、側板１３はブレード１１の剛性を高めてその変形を
防止している。The turbofan configured as described above is
It is rotationally driven in the direction of arrow R shown in FIG. 2B by a motor (not shown). By this rotation, the air is sucked in 1
6 is sucked in along the axial direction, and is blown out in the centrifugal direction from the air outlet 17 by the blade 11. At this time, the hub cover 15 forms a passage for intake air, and the side plate 13 enhances the rigidity of the blade 11 to prevent its deformation.
【００１５】図３は、ブレード１１と熱可塑性樹脂で一
体成形された上記主板１２の部分上面図である。そし
て、この図に示すＡ−Ａ′における軸方向断面を示す図
１を用いて、次にこのターボファンの射出成形方法につ
いて説明する。FIG. 3 is a partial top view of the main plate 12 integrally formed with the blade 11 and the thermoplastic resin. Then, the injection molding method of this turbofan will be described next with reference to FIG. 1 showing an axial cross section taken along line AA ′ in this figure.
【００１６】図１（ａ）は、上記射出成形に用いる金型
の部分断面図である。図において１は下面側金型（主板
１２の下面側を成形するための金型）であり、２はブレ
ード１１を形成するためのブレード凹所９を設けた上面
側金型（主板１２の上面側を成形するための金型）であ
る。そして上記下面側金型１には、成形されたブレード
１１に肉ヌスミ７（同図（ｃ）参照）を設けるための突
出部３が設けられ、さらにこの突出部３には圧入ガス６
（同図（ｂ）参照）を金型に圧入するためのガス管４が
設けられている。また、図において５は、成形されたブ
レード１１を図の下方から押して離型させるための突出
ピンである。FIG. 1A is a partial sectional view of a mold used for the above injection molding. In the figure, 1 is a lower surface mold (mold for molding the lower surface side of the main plate 12), 2 is an upper surface mold having a blade recess 9 for forming a blade 11 (upper surface of the main plate 12) It is a mold for molding the side). Further, the lower surface side mold 1 is provided with a protruding portion 3 for providing the molded blade 11 with the meat slack 7 (see FIG. 1C), and the protruding portion 3 is further provided with a press-fitted gas 6
A gas pipe 4 for press-fitting (see (b) in the figure) into the mold is provided. Further, in the figure, reference numeral 5 is a projecting pin for pushing the molded blade 11 from the lower side of the figure to release it.
【００１７】図１（ｂ）は、上記金型１、２を用いたタ
ーボファンの射出成形途中の状態を示す部分断面図であ
る。同図（ａ）に示すようにセットされた金型に、図示
しない射出ノズル等から射出された熱可塑性樹脂１０
を、矢印ＢあるいはＢ′に示す方向から流入させる。こ
のとき、下面側金型１には上記突出部３が設けられてい
るため、成形品の厚肉部となる部分は従来よりも減少
し、そのため熱可塑性樹脂１０の流動性は均一化して金
型全体にわたる均一な樹脂流入を行なうことができる。
そしてこの樹脂流入が終了すれば、次に上記ガス管４よ
り圧入ガス６を図に示す矢印Ｃの方向から圧入する。こ
の圧入によって、上側金型２のブレード凹所９の先端部
分にまで熱可塑性樹脂１０を確実に密着させることがで
きるので、保圧工程を省いて成形時間を短縮し、生産性
の向上を図ることができる。FIG. 1B is a partial cross-sectional view showing a state in which a turbofan using the molds 1 and 2 is being injection-molded. The thermoplastic resin 10 injected from an injection nozzle or the like (not shown) into the mold set as shown in FIG.
In the direction indicated by arrow B or B '. At this time, since the lower surface mold 1 is provided with the above-mentioned protruding portion 3, the portion that becomes the thick portion of the molded product is reduced as compared with the conventional one, so that the fluidity of the thermoplastic resin 10 is made uniform, and A uniform resin inflow can be performed over the entire mold.
Then, when this resin inflow ends, the press-in gas 6 is then press-in from the gas pipe 4 in the direction of arrow C shown in the figure. By this press-fitting, the thermoplastic resin 10 can be surely brought into close contact with the tip portion of the blade recess 9 of the upper mold 2, so that the pressure-holding step is omitted, the molding time is shortened, and the productivity is improved. be able to.
【００１８】また、従来は金型強度の問題から上記突出
部３の高さは高くできず、従って、肉ヌスミ７はブレー
ド１１の根元部にのみ設けていたが、上記のように保圧
工程を省くことによってこの問題は軽減されるため、こ
の金型における上記突出部３はブレード凹所９の深さの
約２／３にまで設けている。そして、これによってブレ
ード１１の高さの約２／３の深さにまで肉ヌスミ７を設
けることがてき、樹脂量の減少による軽量化を図ること
ができる。また、中空成形法を用いた成形においては、
溶融した樹脂が金型から押出された時、バラス効果によ
って金型ダイスの直径より太くなったり、その後自重に
よってたれ下り現象を起こして細くなったりするのが一
般的であり、所定の肉厚寸法を正確に有する成形品を得
るのは困難となっている。そのため、中空成形法を用い
て軽量化を図った従来のターボファンでは、回転時の動
バランスが不安定なため騒音特性等の基本性能が劣化す
るという問題があった。しかし、このターボファンにお
いては、上記のようにブレード１１の高さの約２／３の
深さを有する肉ヌスミ７を設け、これより先端部のみを
中空成形するようにしているので、従来の中空成形によ
るターボファンと同様の軽量化を図りながらも、動バラ
ンスが良好で騒音等の基本性能を良好に維持したターボ
ファンを得ることができる。Further, conventionally, the height of the protrusion 3 cannot be increased due to the problem of die strength, and thus the meat slack 7 is provided only at the root of the blade 11, but as described above, the pressure holding step is performed. Since this problem is alleviated by omitting the above, the protrusion 3 in this mold is provided up to about 2/3 of the depth of the blade recess 9. As a result, the meat slack 7 can be provided to a depth of about ⅔ of the height of the blade 11, and the weight can be reduced by reducing the amount of resin. Further, in the molding using the hollow molding method,
When the molten resin is extruded from the mold, it is generally thicker than the diameter of the mold die due to the ballast effect, and then it becomes sluggish due to its own weight and becomes thinner. It is difficult to obtain a molded product having exactly Therefore, the conventional turbofan whose weight is reduced by using the hollow molding method has a problem that basic performance such as noise characteristics is deteriorated because the dynamic balance during rotation is unstable. However, in this turbofan, as described above, since the meat slime 7 having a depth of about ⅔ of the height of the blade 11 is provided, and only the tip portion is hollow-molded from this, the conventional structure is used. It is possible to obtain a turbofan that has good dynamic balance and maintains good basic performance such as noise, while achieving the same weight reduction as a turbofan by hollow molding.
【００１９】図１（ｃ）は、上記の成形法によって成形
されたターボファンの部分断面図である。ブレード１１
には、その高さの約２／３の深さを有する肉ヌスミ７
と、圧入ガス６によって生じた中空部８とが設けられて
いる。そしてこれらによって樹脂量が減少してターボフ
ァンが軽量化されている。FIG. 1C is a partial cross-sectional view of a turbofan molded by the above molding method. Blade 11
The meat has a depth of about 2/3 of its height
And a hollow portion 8 generated by the press-fitted gas 6. The amount of resin is reduced by these and the weight of the turbofan is reduced.
【００２０】以上にこの発明の具体的な実施例について
説明したが、この発明は上記実施例に限定されるもので
はなく、この発明の範囲内で種々変更して実施すること
ができる。例えば樹脂流入後の保圧工程を省略するとし
たが、突出部３がその金型強度によって十分耐え得る程
度の保圧を行なうようにしてもよい。また、圧入ガス６
は突出部３から圧入するとしたが、これは例えば、突出
ピン５等から圧入してブレード１１の先端部について中
空成形を行なうようにしてもよい。The specific embodiments of the present invention have been described above, but the present invention is not limited to the above embodiments, and various modifications can be carried out within the scope of the present invention. For example, although the pressure-holding step after the resin has flown in is omitted, the protrusion 3 may be pressure-held enough to withstand the mold strength. In addition, pressurizing gas 6
Although the press-fitting is performed from the projecting portion 3, the press-fitting may be performed, for example, from the projecting pin 5 or the like to hollow-form the tip portion of the blade 11.
【００２１】[0021]
【発明の効果】上記請求項１のターボファンの射出成形
方法では、金型に設けた突出部によってブレードに肉ヌ
スミを設け、この肉ヌスミより先端側は圧入ガスによっ
て中空成形するようにしている。そのため、成形品の厚
肉部が減少して樹脂流入時の流動性が均一化し、さらに
圧入ガスによってブレードの先端側の樹脂が金型に確実
に密着するので、保圧の必要性が低減する。従って、成
形時間を短縮して生産性の向上を図ることが可能とな
る。また、厚肉部の減少に伴って樹脂量が減少するの
で、成形されたターボファンの軽量化を図ることが可能
となる。In the turbofan injection molding method according to the first aspect of the invention, the blade is provided with meat slacks by the protrusion provided on the mold, and the tip end side of the slacks is hollow-molded by the press-fitting gas. . Therefore, the thick part of the molded product is reduced and the fluidity at the time of resin inflow is made uniform, and the resin on the tip side of the blade is surely brought into close contact with the mold by the press-fitting gas, reducing the need for holding pressure. . Therefore, it becomes possible to shorten the molding time and improve the productivity. Moreover, since the amount of resin decreases as the number of thick portions decreases, it is possible to reduce the weight of the molded turbo fan.
【００２２】また請求項２のターボファンの射出成形方
法では、上記肉ヌスミの深さをブレードの高さの約１／
２〜約２／３としている。従って、中空成形されるのは
ブレードの先端部のみとなるので、これに伴うバラス効
果やたれ下り現象による偏肉を低減でき、成形されたタ
ーボファンの動バランスを安定なものとして騒音特性等
の基本性能を良好に維持することが可能となる。Further, in the injection molding method for the turbofan according to the second aspect, the depth of the meat slime is about 1 / the height of the blade.
It is set to 2 to about 2/3. Therefore, since only the tip of the blade is hollow-molded, it is possible to reduce unevenness due to the loosening effect and the sagging phenomenon that accompany this, and to stabilize the dynamic balance of the molded turbo fan to reduce noise characteristics and the like. It is possible to maintain good basic performance.
【００２３】さらに請求項３のターボファンでは、ブレ
ードに肉ヌスミを設けると共に、これより先端側には中
空成形による中空部を設けている。従って、樹脂量を減
少させて軽量化を図ることが可能であると共に、動バラ
ンスが安定なため、騒音特性等の基本特性を良好に維持
することが可能となる。Further, in the turbofan according to the third aspect, the blade is provided with a meat slack and a hollow portion formed by hollow molding is provided on the tip end side thereof. Therefore, it is possible to reduce the amount of resin and reduce the weight, and since the dynamic balance is stable, it is possible to maintain good basic characteristics such as noise characteristics.
【図１】この発明の一実施例におけるターボファンの射
出成形を示す図で、（ａ）は金型の部分断面図、（ｂ）
は成形時の状態を示す部分断面図、（ｃ）は成形された
ターボファンの部分断面図である。1A and 1B are views showing injection molding of a turbofan according to an embodiment of the present invention, in which FIG. 1A is a partial sectional view of a mold, and FIG.
Is a partial cross-sectional view showing a state at the time of molding, and (c) is a partial cross-sectional view of the molded turbo fan.
【図２】上記ターボファンの構成を示す図で、（ａ）は
その側面及び縦断面を示す図であり、（ｂ）は上面図で
ある。2A and 2B are diagrams showing a configuration of the turbofan, in which FIG. 2A is a side view and a vertical sectional view thereof, and FIG. 2B is a top view.
【図３】上記ターボファンの主板を示す部分上面図であ
る。FIG. 3 is a partial top view showing a main plate of the turbofan.
１ 下面側金型 ３ 突出部 ６ 圧入ガス ７ 肉ヌスミ ８ 中空部 １１ ブレード １２ 主板 1 Lower surface mold 3 Projection part 6 Press-fit gas 7 Meat slime 8 Hollow part 11 Blade 12 Main plate
Claims (3)
可塑性樹脂で一体成形されるターボファンの射出成形方
法において、ブレード（１１）に肉ヌスミ（７）を設け
るために金型（１）に突出部（３）を設け、ブレード
（１１）の上記肉ヌスミ（７）より先端側は圧入ガス
（６）により中空成形することを特徴とするターボファ
ンの射出成形方法。1. An injection molding method for a turbofan in which a main plate (12) and a blade (11) are integrally molded of a thermoplastic resin, and a mold (1) is provided for providing a meat slime (7) on the blade (11). ) Is provided with a protrusion (3), and the tip side of the blade (11) with respect to the meat slack (7) is hollow-molded by a press-fit gas (6).
（１１）の高さの約１／２〜約２／３としたことを特徴
とする請求項１のターボファンの射出成形方法。2. The method of injection molding a turbofan according to claim 1, wherein the depth of the meat slime (7) is about 1/2 to about 2/3 of the height of the blade (11). .
可塑性樹脂で一体成形されたターボファンにおいて、ブ
レード（１１）に肉ヌスミ（７）を設け、ブレード（１
１）の上記肉ヌスミ（７）より先端側に、中空成形によ
り形成された中空部（８）を設けたことを特徴とするタ
ーボファン。3. A turbofan in which a main plate (12) and a blade (11) are integrally formed of a thermoplastic resin, wherein a blade (11) is provided with meat slacks (7) to form a blade (1).
A turbofan characterized in that a hollow portion (8) formed by hollow molding is provided on the tip side of the meat slime (7) of 1).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP06334701A JP3131624B2 (en) | 1994-12-06 | 1994-12-06 | Injection molding method for turbofan and turbofan |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP06334701A JP3131624B2 (en) | 1994-12-06 | 1994-12-06 | Injection molding method for turbofan and turbofan |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH08159091A true JPH08159091A (en) | 1996-06-18 |
| JP3131624B2 JP3131624B2 (en) | 2001-02-05 |
Family
ID=18280253
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP06334701A Expired - Fee Related JP3131624B2 (en) | 1994-12-06 | 1994-12-06 | Injection molding method for turbofan and turbofan |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP3131624B2 (en) |
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2007120445A (en) * | 2005-10-31 | 2007-05-17 | Mitsubishi Electric Corp | Turbo fan |
| EP1878923A2 (en) | 2003-11-27 | 2008-01-16 | Daikin Industries, Ltd. | Impeller of centrifugal fan and centrifugal fan disposed with the impeller |
| JP2012052439A (en) * | 2010-08-31 | 2012-03-15 | Mitsubishi Heavy Ind Ltd | Impeller |
| JP2014169705A (en) * | 2014-06-23 | 2014-09-18 | Mitsubishi Heavy Ind Ltd | Impeller |
| JP2015086827A (en) * | 2013-11-01 | 2015-05-07 | 日清紡メカトロニクス株式会社 | Turbo fan |
| JP2017020409A (en) * | 2015-07-10 | 2017-01-26 | 株式会社日本自動車部品総合研究所 | Centrifugal fan and its manufacturing method |
| JP2019167939A (en) * | 2018-03-26 | 2019-10-03 | 東芝キヤリア株式会社 | Air blower and indoor unit of air conditioner |
| CN116277758A (en) * | 2023-03-22 | 2023-06-23 | 连云港创诚塑胶科技有限公司 | Production device and preparation method of high-toughness wear-resistant automobile hub guard ring |
-
1994
- 1994-12-06 JP JP06334701A patent/JP3131624B2/en not_active Expired - Fee Related
Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP1878923A2 (en) | 2003-11-27 | 2008-01-16 | Daikin Industries, Ltd. | Impeller of centrifugal fan and centrifugal fan disposed with the impeller |
| US8007240B2 (en) | 2003-11-27 | 2011-08-30 | Daikin Industries, Ltd. | Impeller of centrifugal fan and centrifugal fan disposed with the impeller |
| JP2007120445A (en) * | 2005-10-31 | 2007-05-17 | Mitsubishi Electric Corp | Turbo fan |
| JP2012052439A (en) * | 2010-08-31 | 2012-03-15 | Mitsubishi Heavy Ind Ltd | Impeller |
| JP2015086827A (en) * | 2013-11-01 | 2015-05-07 | 日清紡メカトロニクス株式会社 | Turbo fan |
| JP2014169705A (en) * | 2014-06-23 | 2014-09-18 | Mitsubishi Heavy Ind Ltd | Impeller |
| JP2017020409A (en) * | 2015-07-10 | 2017-01-26 | 株式会社日本自動車部品総合研究所 | Centrifugal fan and its manufacturing method |
| JP2019167939A (en) * | 2018-03-26 | 2019-10-03 | 東芝キヤリア株式会社 | Air blower and indoor unit of air conditioner |
| CN116277758A (en) * | 2023-03-22 | 2023-06-23 | 连云港创诚塑胶科技有限公司 | Production device and preparation method of high-toughness wear-resistant automobile hub guard ring |
| CN116277758B (en) * | 2023-03-22 | 2024-01-05 | 连云港创诚塑胶科技有限公司 | Production device and preparation method of high-toughness wear-resistant automobile hub guard ring |
Also Published As
| Publication number | Publication date |
|---|---|
| JP3131624B2 (en) | 2001-02-05 |
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