JP5230040B1 - Twist-type sirocco fan injection molding method and molding die - Google Patents
Twist-type sirocco fan injection molding method and molding die Download PDFInfo
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Abstract
【課題】静音性に優れ、コンパクトでありながら送風量も大きくできるツイスト型シロッコファンを射出成形によって一体成形し、金型から成形品の離型が容易で、且つブレード等に変形や残留応力の問題を伴わない成形方法及びこれに用いる金型の技術提供を図る。
【解決手段】
雄型に付いた成形品を離型させる突き出し工程において、可動側金型には、補助リング端面を突き出すための補助リング突き出しプレートと、成形品の閉口側端面内壁と広く面接触させて突き出すための内壁突き出しプレートとを其々設けて、これら双方の突き出しプレートを相対的に成形品に押し付けることにより成形品を突き出すと共に、成形品のブレード部を成形する雄型の傾斜溝をガイドとして成形品を回転させながら離型させる方法を用いるツイスト型シロッコファンの射出成形方法及び金型とした。
【選択図】図1An object of the present invention is to form a twist type sirocco fan that is excellent in silence, compact, and capable of increasing air flow by injection molding, so that the molded product can be easily released from the mold, and deformation and residual stress on the blade etc. To provide a molding method that does not involve a problem and a technique for a mold used therefor.
[Solution]
In the ejecting process for releasing the molded product attached to the male mold, the movable die is ejected in wide surface contact with the auxiliary ring projecting plate for projecting the end surface of the auxiliary ring and the inner wall of the closed end surface of the molded product. The inner wall protruding plate is provided, and both the protruding plates are relatively pressed against the molded product to eject the molded product, and the molded product with the male inclined groove forming the blade part of the molded product as a guide An injection molding method and a mold for a twist type sirocco fan using a method of releasing mold while rotating.
[Selection] Figure 1
Description
本発明は、空調用送風機に用いられるシロッコファンの成形方法とその成形用金型の技術に関し、詳しくは、複数のブレードが軸芯方向に対して傾斜する樹脂製のツイスト型シロッコファンを、射出成形によって一体成形する成形方法と、この成形方法に用いる金型の技術に関する。 The present invention relates to a method for molding a sirocco fan used in an air-conditioning blower and a technology of a mold for molding the sirocco fan. Specifically, a resin twist-type sirocco fan in which a plurality of blades are inclined with respect to the axial direction is injected. The present invention relates to a molding method for integrally molding by molding, and a technique of a mold used for the molding method.
シロッコファンは、比較的風量が多く静圧も高い範囲に用いられる送風機であり、プラントの排気用として利用されている極めて大型のものから、ヘアードライヤー用のように、高い静粛性と小型化が求められるようなものまで、サイズ的にも用途的にも利用範囲が広い送風機である。また、近年の自動車では、車体のコンパクト化や軽量化を図りながらも、空調空間である室内はできるだけ広くする設計がなされるようになってきている。このためエンジンルームはどんどん狭くなり、カーエアコンの小型化を図ることは急務といえる現状にある。しかしながら、従来以上の送風量を可能としながら小型化を図ることは技術的に容易なことではなく、また、高い静音性や高性能、更には、品質の向上といった他にも多くの条件をクリアできるシロッコファン、並びにこれを効率よく低コストに生産できる製造方法技術が待ち望まれているところである。 A sirocco fan is a blower that is used in a relatively large air volume and high static pressure range. From a very large fan used for exhaust of a plant, it has high silence and miniaturization, like a hair dryer. It is a blower with a wide range of use, both in terms of size and application, up to what is required. In recent automobiles, the interior of the air-conditioned space is designed to be as wide as possible while reducing the size and weight of the vehicle body. For this reason, the engine room is getting smaller and it is an urgent task to reduce the size of car air conditioners. However, it is not technically easy to reduce the size while allowing more airflow than before, and it also satisfies many other conditions such as high silence, high performance, and improved quality. There is a long-awaited sirocco fan that can be produced and a manufacturing method technology that can efficiently produce the sirocco fan at low cost.
一般的なシロッコファンは、回転軸芯を中心として円周に配置された複数のブレードが、軸芯と平行に延びるように成形され、素材的には金属製と樹脂製に大別されるが、樹脂製のものであれば、射出成形機により一体成形されるものがほとんどである。他方、シロッコファンとは構成が異なるものの、クロスフローファンも複数のブレードが左右の軸芯方向と平行に延びるように円周に形成される点においてシロッコファンと共通している。係るクロスフローファンの構造においては、この複数のブレードの両端位置を軸芯方向に対してツイスト（「ひねる」「ねじる」）するように傾斜させることで、一枚当たりのブレード面積を増やして送風量を増加させると共に、空気の流れを整流して騒音の低減を図る技術も提案されている。 A general sirocco fan is formed such that a plurality of blades arranged circumferentially around a rotation axis extends in parallel with the axis, and the material is roughly divided into metal and resin. If it is made of a resin, it is almost all integrally molded by an injection molding machine. On the other hand, although the configuration is different from the sirocco fan, the cross flow fan is also common to the sirocco fan in that a plurality of blades are formed in a circumference so as to extend in parallel with the left and right axial directions. In such a cross-flow fan structure, the both blades are inclined so that they are twisted (“twisted” and “twisted”) with respect to the axial direction to increase the blade area per sheet. A technique for reducing the noise by increasing the air volume and rectifying the air flow has also been proposed.
例えば、「サインカーブ形状に射出成形された翼を回転軸の方向に引き延ばして複数の円形支持部材の各外周面に所望のスパイラル角で接合固定したことを特徴とするクロスフローファン。」（特許文献１参照）や、「軸方向に所定間隔に並べた複数の支え円板の外周寄りの周方向に、多数の翼を配列してなる貫流ファンにおいて、前記の個々の翼を、前記複数の支え円板の一端の円板から他端の円板に至る軸方向平行線に対して所定角度で同一方向に傾斜させるとともに、前記多数の翼は、周方向にランダムなピッチで配列したものであることを特徴とする貫流ファン。」（特許文献２参照）などである。 For example, “a cross flow fan characterized in that a wing that is injection-molded in a sine curve shape is stretched in the direction of the rotation axis and bonded and fixed to each outer peripheral surface of a plurality of circular support members at a desired spiral angle.” (Patent In a cross-flow fan in which a plurality of blades are arranged in a circumferential direction near the outer periphery of a plurality of support disks arranged in a predetermined interval in the axial direction, the individual blades are connected to the plurality of blades. The supporting blade is inclined in the same direction at a predetermined angle with respect to an axial parallel line extending from a disk at one end to a disk at the other end, and the plurality of blades are arranged at a random pitch in the circumferential direction. Cross-flow fan characterized by being "(see Patent Document 2).
係る技術を、シロッコファンに取り入れ、クロスフローファンのように複数のブレードをツイスト状に傾斜させることで、騒音の低減や送風量の増加を図ることが可能となる。ところが、大量生産されるシロッコファンに目を向けると、このようなツイスト状のブレード構造を有する樹脂製一体構造のシロッコファンは皆無である。 By incorporating such technology into a sirocco fan and tilting a plurality of blades like a cross flow fan in a twisted manner, it becomes possible to reduce noise and increase the amount of air flow. However, when looking at sirocco fans that are mass-produced, there is no sirocco fan that has such a twisted blade structure and has an integral resin structure.
その大きな理由の一つに、射出成形における雄型と雌型との型開きの困難性、又は成形品突き出し工程における成形品の離型の困難性がある。従来から、複数のブレードをツイスト状に傾斜させる形状は、ブレード部がアンダーカット形状（軸芯方向の引き抜きだけでは離型できない形状）と考えられ、固定側金型と可動側金型の型開きや成形品を雄型から離型する際に、ブレードの傾斜に沿った動きを与えるための案内機構を設けたり、スライドコアを用いて軸芯方向から垂直方向へ離型させたり、雄型（コア）もしくは雌型（キャビティー）をモーターで回動させながら成形品を離型させたりするなど、多種多様な構成により対応してきたが、いずれも構造が複雑となり、コストや手間がかかるという問題を解決できないでいた。また、各ブレード間に金具を挿入して射出し、固化後にインサート金具を取り外すといった、インサート成形方法を応用することも考えられるが、係る成形方法ではインサート金具の脱着数が多いため作業効率が悪い。従って、生産性が低くコスト的にも量産できないという問題がある。 One of the major reasons is that it is difficult to open the male and female dies in injection molding, or difficult to release the molded product in the molded product ejection process. Conventionally, the shape that inclines a plurality of blades in a twisted shape is thought to be an undercut shape (a shape that cannot be released only by pulling in the axial direction), and the mold opening of the fixed side mold and the movable side mold When a molded product is released from the male mold, a guide mechanism is provided to give movement along the blade inclination, or the mold is released from the axial direction to the vertical direction using a slide core. We have dealt with various configurations such as releasing the molded product while rotating the core) or female die (cavity) with a motor, but the problem is that the structure is complicated and costly and troublesome. Could not be resolved. In addition, it is conceivable to apply an insert molding method in which a metal fitting is inserted between each blade, injected, and the insert metal fitting is removed after solidification. However, in such a molding method, work efficiency is poor due to the large number of insert metal fittings. . Therefore, there is a problem that productivity is low and mass production cannot be performed.
そして、もう一つの大きな理由は品質の問題である。例えば、まだ成形品の温度が高い離型時において、突き出しプレート（ストリッパープレート）によって成形品の底面部を突き出したり、成形品の内面壁を突き出しピンで突き出すといった通常の離型をさせると、いわゆる無理抜きとなり、薄いブレード部にかかる圧縮力や引張力によって変形を生じたり残留応力が残るなどの問題がある。また、高速回転するシロッコファンにおいて、このような変形等があると、振動や騒音の原因となるため品質的な問題が生じ易い。 Another major reason is quality issues. For example, at the time of mold release when the temperature of the molded product is still high, if a normal mold release is performed such that the bottom surface of the molded product is ejected by a projecting plate (stripper plate) or the inner wall of the molded product is ejected by a projecting pin. There are problems such as unreasonable removal, deformation due to compressive force or tensile force applied to the thin blade, and residual stress remaining. In addition, in a sirocco fan that rotates at a high speed, if there is such deformation or the like, it causes vibration and noise, so that quality problems are likely to occur.
そこで、このような問題に鑑みた技術提案として、例えば、「直円錐台状の羽根車は中空で先細りの角筒状に形成された羽根を円周方向に一定の間隔を設けて回転軸に略平行に所要数配置して、角筒状の通気路と回転軸心側から隣接する羽根同士の前記一定の間隔を通り外周部へのスリット状の通気路を形成し、二つの気流が羽根を介して交差する構成とし、羽根は曲面を有するシート状のブレードを複数の吸着用穴により吸引保持したユニットによって工程間を移動し、ハブに融着する方法により気流経路が簡単で本体が小容積で組立の自動化が容易で安定した高換気効率にできるという効果のある給排気同時ファンの羽根車とその製造方法」がある（特許文献３参照）。しかしながら、係る技術では、製品全体を一度の射出成形で成形できず、製造に際しては複数の工程と多くの部材の結合を必要とするため、製造に要する時間やコストがかかるという問題がある。 Therefore, as a technical proposal in view of such a problem, for example, “a frustoconical impeller is a hollow, tapered rectangular tube shaped blade that is provided with a constant interval in the circumferential direction to the rotating shaft. A required number of gas pipes are arranged substantially in parallel to form a slit-like air passage to the outer peripheral portion through the fixed interval between the square tube-like air passage and the blades adjacent from the rotation axis side. The blades are configured to cross each other, and the blades are moved between processes by a unit that sucks and holds a sheet-like blade having a curved surface through a plurality of suction holes, and the airflow path is simple and the main body is small by fusing to the hub. There is an impeller of a simultaneous supply / exhaust fan and a manufacturing method thereof, which is easy to automate assembly by volume and can achieve stable high ventilation efficiency (see Patent Document 3). However, with such a technique, the entire product cannot be molded by a single injection molding, and a plurality of processes and a large number of members need to be combined in the production, and thus there is a problem that it takes time and cost for the production.
また、前述した離型の困難性の問題を解決すべく、「複数のブレードが円周方向に傾斜した遠心式ファンを成形する際に、成形した遠心式ファンの離型を容易に行うことが可能な成形用金型、その成形用金型を用いた成形方法、および成形装置」の提供を目的として「金型からシロッコファンを離型するときには、アンダーカット構造を形成しているシロッコファンのブレード間から、固定型のブレード形成コア部および可動型のブレード形成コア部を螺旋移動させて引き抜き、シロッコファンの金型からの脱離を容易に行うことができる」技術も提案されている（特許文献４参照）。しかしながら、係る技術では、製品の螺旋形状に対応した案内手段や螺旋移動手段、大掛かりな油圧シリンダーを用いた駆動手段等を必要とするなど、構造が複雑でコストもかかり、汎用性にも欠けるといった問題を残しているといえる。 Further, in order to solve the above-described problem of mold release difficulty, “when forming a centrifugal fan having a plurality of blades inclined in the circumferential direction, the molded centrifugal fan can be easily released. For the purpose of providing a possible molding die, a molding method using the molding die, and a molding apparatus, “when the sirocco fan is released from the die, an undercut structure of the sirocco fan is formed. A technique has also been proposed in which the fixed blade forming core part and the movable blade forming core part are spirally moved and pulled out from between the blades, and the sirocco fan can be easily detached from the mold. (See Patent Document 4). However, such a technique requires a guiding means corresponding to the spiral shape of the product, a spiral moving means, a driving means using a large hydraulic cylinder, etc., and the structure is complicated, expensive, and lacks versatility. It can be said that the problem remains.
そこで、本願発明者は、軸芯方向に対してツイスト状に傾斜する複数のブレードを有するシロッコファンの射出成形において、回転駆動や案内機構といった複雑な金型構造等ではなく、固定側の金型から可動側の金型を真っ直ぐに引き離せる型開き工程と、その後に成形品を金型から容易に離型できる突き出し工程において、離型の際の変形や残留応力の問題を伴わない成形方法はないものかとの着想の下、ツイスト状の複数のブレードを、外側又は内側への突起という従来の固定的な考え方を捨て、ツイストしたブレード部がアンダーカット形状とならないシロッコファン形状を見出し、複数のブレードの両端部に其々形される支持プレート及び補助リングを相対的に押し出すことで、変形や残留応力の問題を回避できる成形方法及びこれに用いられる金型を発明するに至ったものである。 Therefore, the inventor of the present application, in injection molding of a sirocco fan having a plurality of blades inclined in a twist shape with respect to the axial direction, is not a complicated mold structure such as a rotational drive or a guide mechanism, but a fixed mold Molding method that does not cause deformation and residual stress problems during mold release in the mold opening process that allows the mold on the movable side to be pulled straight away from the mold and the extrusion process that allows the molded product to be easily released from the mold. Based on the idea that there is no such thing, abandoning the conventional fixed idea of twisting multiple blades outward or inward, and finding a sirocco fan shape where the twisted blade part does not become an undercut shape, multiple Molding method capable of avoiding problems of deformation and residual stress by relatively pushing out the support plate and auxiliary ring respectively formed at both ends of the blade And it has reached to invent a mold used.
本発明は、上記問題点に鑑み、静粛性に優れ、コンパクトでありながら送風量も大きくできるツイスト型シロッコファンを射出成形によって一体成形し、成形後は固定側の金型から可動側の金型を真っ直ぐ引き離すことができ、金型から成形品の離型が容易で、離型の際の割れや変形の問題、さらには残留応力の問題を伴わない成形方法、及びこれに用いる金型の技術提供を図る。 In view of the above problems, the present invention integrally forms a twist type sirocco fan that is excellent in quietness, compact, and capable of increasing air flow by injection molding, and after molding, from a fixed mold to a movable mold. Can be pulled straight, the mold can be easily released from the mold, and there are no problems of cracking or deformation at the time of mold release, and there is no problem of residual stress, and the technology of the mold used therefor Offer.
本発明は、上記目的を達成するために、複数のブレードが軸芯方向に対してツイスト状に傾斜し、開口側の端部外周に補助リングを有する樹脂製のツイスト型シロッコファンを射出成形によって一体成形する成形方法であって、型締め工程、ノズルタッチ工程、射出工程、型開き工程などの一連の射出成形工程を経た後、キャビティー内で固化し、雄型に付いた成形品を離型させる突き出し工程において、可動側金型には、前記補助リング端面を突き出すための補助リング突き出しプレートと、成形品の閉口側端面内壁と広く面接触させて突き出すための内壁突き出しプレートとを其々設けて、これら双方の突き出しプレートを相対的に成形品に押し付けることにより成形品を突き出すと共に、成形品のブレード部を成形する雄型の傾斜溝をガイドとして成形品を回転させながら離型させる方法を用いることを特徴とするツイスト型シロッコファンの射出成形方法とした。 In order to achieve the above object, the present invention provides a resin twist type sirocco fan having a plurality of blades inclined in a twisted manner with respect to the axial direction and having an auxiliary ring on the outer periphery of the opening side by injection molding. It is a molding method that forms a single piece. After a series of injection molding processes such as a mold clamping process, nozzle touch process, injection process, mold opening process, etc., it is solidified in the cavity and the molded product attached to the male mold is separated. In the projecting step to mold, the movable side mold is provided with an auxiliary ring ejecting plate for projecting the end surface of the auxiliary ring and an inner wall ejecting plate for projecting in wide contact with the inner wall of the closed side end surface of the molded product. A male inclined groove that molds the blade part of the molded product as well as ejects the molded product by pressing both of the protruding plates against the molded product relatively. And an injection molding method of the twist type sirocco fan, which comprises using a method of release while rotating the molded article as id.
また、本発明は、前記突き出し工程において、前記補助リング突き出しプレートと前記内壁突き出しプレートによる突き出しの他に、可動側金型には、更に成形品のボス部近傍を突き出すための複数の突き出した突き出しピンを設け、これを前記補助リング突き出プレート及び前記内壁突き出しプレートと相対的に成形品に押し付けることにより、成形品を突き出す方法を用いる前記に記載のツイスト型シロッコファンの射出成形方法とすることもできる。
Further, according to the present invention, in the projecting step, in addition to the projecting by the auxiliary ring projecting plate and the inner wall projecting plate, the movable side mold further includes a plurality of projecting projects for projecting the vicinity of the boss portion of the molded product. A twist type sirocco fan injection molding method as described above, which uses a method of ejecting a molded product by providing a pin and pressing it against the molded product relative to the auxiliary ring ejecting plate and the inner wall ejecting plate. it can.
また、本発明は、前記補助リング突き出しプレートが雄型に対して回動自在となる構成を採用した前記固定用金型を利用する前記に記載のツイスト型シロッコファンの射出成形方法とすることもできる。 Further, the present invention may also be the twist-type sirocco fan injection molding method described above that uses the fixing mold adopting a configuration in which the auxiliary ring protruding plate is rotatable with respect to the male mold. it can.
また、本発明は、複数のブレードが軸芯方向に対してツイスト状に傾斜し、開口側の端部外周に補助リングを有する樹脂製のツイスト型シロッコファンを射出成形によって一体成形する特許請求の範囲の請求項１のツイスト型シロッコファンの射出成形方法に用いられる金型であって、雄型と突き出し機構が配置される可動側金型と、雌型が配置される固定側金型とから成り、前記雌型の形状は、成形品の外縁を成すアンダーカット形状を有しない略円柱穴形状であり、前記雄型の形状は、略円柱形状であり、その外周には成形品となるシロッコファンのブレード部を成形するための溝がツイスト状に掘られており、前記突き出し機構は、成形品となるツイスト型シロッコファンのブレード端部に形成される補助リングの端面を突き出すための補助リング突き出しプレートと、成形品の閉口側端面内壁と広く面接触させて突き出すための内壁突き出しプレートとの双方を相対的に成形品に押し付ける機構を採用したことを特徴とするツイスト型シロッコファンの射出成形用金型とすることもできる。
Further, the present invention provides a method of integrally molding a resin twist type sirocco fan having a plurality of blades inclined in a twist shape with respect to the axial direction and having an auxiliary ring on the outer periphery of the opening side end. A mold used in the method of injection molding of a twist type sirocco fan according to claim 1, comprising: a movable mold in which a male mold and a protruding mechanism are disposed; and a fixed mold in which a female mold is disposed. The shape of the female die is a substantially cylindrical hole shape that does not have an undercut shape that forms the outer edge of the molded product, and the shape of the male die is a substantially cylindrical shape, and a sirocco that is a molded product on the outer periphery thereof. A groove for forming the blade portion of the fan is dug in a twist shape, and the protrusion mechanism protrudes the end face of the auxiliary ring formed at the blade end portion of the twist type sirocco fan to be a molded product. A twist type sirocco fan characterized by adopting a mechanism that relatively presses both the auxiliary ring protruding plate and the inner wall protruding plate for protruding in close contact with the inner wall of the closed end surface of the molded product against the molded product. It can also be set as an injection mold.
また、本発明は、前記請求項２に係るツイスト型シロッコファンの射出成形方法に用いられる金型であって、
前記請求項４に係る前記突き出し機構において、
前記補助リング突き出しプレートと前記内壁突き出しプレートによる突き出し機構の他に、更に成形品のボス部近傍を突き出すための複数の突き出した突き出しピンによる突き出し機構も相対的に成形品に押し付ける突き出し機構であることを特徴とする請求項４に記載のツイスト型シロッコファンの射出成形用金型とすることもできる。
Further, the present invention is a mold used in the injection molding method of the twist type sirocco fan according to claim 2,
In the protrusion mechanism according to claim 4 ,
In addition to the protrusion mechanism by the auxiliary ring protrusion plate and the inner wall protrusion plate, the protrusion mechanism by a plurality of protruding protrusion pins for protruding the vicinity of the boss portion of the molded product is also a thrust mechanism that relatively presses the molded product. The twist-type sirocco fan injection mold according to claim 4, wherein the mold is for injection molding.
また、本発明は、前記請求項３に係るツイスト型シロッコファンの射出成形方法に用いられる金型であって、
前記請求項４又は請求項５に係る前記突き出し機構において、
前記補助リング突き出しプレートが、雄型に対して回動自在となる構成を採用した突き出し機構であることを特徴とする請求項４又は請求項５に記載のツイスト型シロッコファンの射出成形用金型とすることもできる。
Further, the present invention is a mold used in the injection molding method of the twist type sirocco fan according to claim 3,
In the protrusion mechanism according to claim 4 or claim 5 ,
6. The mold for injection molding of a twist type sirocco fan according to claim 4 or 5, wherein the auxiliary ring protruding plate is a protruding mechanism adopting a structure that is rotatable with respect to the male mold. It can also be.
本発明に係るツイスト型シロッコファンの射出成形方法及び金型によれば、成形されるシロッコファンのブレードがツイスト状に傾斜するため、ブレード面積を大きくすることができ、送風量の増加を図ることが可能となると共に、整流効果に優れることから騒音の低減も図れるシロッコファンを、容易かつ低コストに大量生産を可能にする優れた効果を奏する。 According to the injection molding method and the mold of the twist type sirocco fan according to the present invention, the blade of the sirocco fan to be molded is inclined in a twist shape, so that the blade area can be increased and the amount of blown air is increased. In addition, the sirocco fan, which is excellent in the rectifying effect and can reduce noise, has an excellent effect of enabling mass production easily and at low cost.
また、本発明に係るツイスト型シロッコファンの射出成形方法及び金型によれば、突き出し工程において、補助リング突き出しプレートと、内壁突き出しプレートとの双方を相対的に突き出す構成を採用するため、成形品のブレード部には大きな圧縮力や引張力がほとんど働かず、いわゆる無理抜きとならない。このため、薄いブレード部の断裂や変形、或いは残留応力の残存といった従来の問題は生じないという優れた効果を奏する。 In addition, according to the injection molding method and the mold of the twist type sirocco fan according to the present invention, in the projecting process, a configuration in which both the auxiliary ring projecting plate and the inner wall projecting plate are relatively ejected is adopted. A large compressive force or tensile force hardly acts on the blade portion of the blade, so that the so-called excessive force is not eliminated. For this reason, there is an excellent effect that conventional problems such as tearing and deformation of the thin blade portion or remaining residual stress do not occur.
また、本発明に係るツイスト型シロッコファンの射出成形方法及び金型によれば、ブレードがツイスト状に傾斜したシロッコファンを射出成形によって一体成形できるため、組み立て式のように製造工程が多くならず、低コストに生産が可能となる。また、従来のような、コア部を螺旋移動させて引き抜くために、モーターや油圧シリンダーなどを用いる方法では構造が複雑となり、金型代が高くなるという問題が生じてしまう。しかしながら本発明ではシロッコファンのブレード部をアンダーカット構造と捉えずに、型開き工程では何ら回動せずに可動側の金型をまっすぐ引き抜くことができ、成形品を雄型から離型させるのにも特殊な機構を要せずに済むため、単純な２プレート式又は３プレート式でよく、金型代を抑えることが可能となる優れた効果を奏する。 In addition, according to the injection molding method and the mold of the twist type sirocco fan according to the present invention, since the sirocco fan whose blade is inclined in a twist shape can be integrally formed by injection molding, the manufacturing process does not increase as in the assembly type. Production at low cost becomes possible. In addition, the conventional method of using a motor, a hydraulic cylinder, or the like to pull out the core portion by spiral movement causes a problem that the structure becomes complicated and the mold cost becomes high. However, in the present invention, the blade part of the sirocco fan is not regarded as an undercut structure, and the mold on the movable side can be pulled straight without any rotation in the mold opening process, and the molded product is released from the male mold. In addition, since a special mechanism is not required, a simple two-plate type or three-plate type may be used, and an excellent effect can be obtained that can reduce the cost of the mold.
また、従来の突き出しピン式のみの突き出しによる離型では、ピンの先端面に突き出し力が集中するため、樹脂の種類によっては、割れや変形、或いはピン跡が残るなどの問題があり、射出圧力を低くしたり、シリンダ温度を高くしなければならないなど離型性に問題があった。しかし、本発明では広い面積に突き出し力が分散されるため、このような問題は極めて生じ難くできるという優れた効果を奏する。 Also, in the conventional mold release with only the protruding pin type, the protruding force concentrates on the tip surface of the pin, so depending on the type of resin, there are problems such as cracking, deformation, or pin marks remaining, and injection pressure There was a problem in releasability such as lowering the temperature or increasing the cylinder temperature. However, in the present invention, since the protruding force is distributed over a wide area, there is an excellent effect that such a problem can be hardly caused.
また、本発明に係るツイスト型シロッコファンの射出成形方法及び金型において、補助リング突き出しプレートが雄型に対して回動自在となる構成を採用した場合は、該補助リング突き出しプレートが成形品の離型の際の回転に応じて回動するため、型傷や擦り傷の問題が生じないという優れた効果を奏する。 In addition, in the injection molding method and mold of the twist type sirocco fan according to the present invention, when the auxiliary ring protruding plate is configured to be rotatable with respect to the male mold, the auxiliary ring protruding plate is a molded product. Since it rotates according to the rotation at the time of mold release, there is an excellent effect that the problem of mold scratches and scratches does not occur.
本発明は、複数のブレード６３が軸芯方向に対してツイスト状に傾斜する樹脂製のツイスト型シロッコファンを射出成形によって一体成形する射出成形方法並びに、該成形方法に用いられる金型に関し、可動側金型１０に成形品６０の補助リング６２の端面を突き出すための補助リング突き出しプレート３４と、成形品６０の閉口側端面内壁６１と広く面接触して突き出すための内壁突き出しプレート３７とを其々設けて、これら双方の突き出しプレートを相対的に成形品６０に突き出し、雄型２０の傾斜溝をガイドとして成形品６０を回転させながら離型させる方法を用いたことを最大の特徴とするものである。以下、実施例を図面に基づいて説明する。 The present invention relates to an injection molding method in which a resin twist sirocco fan in which a plurality of blades 63 are inclined in a twist shape with respect to the axial direction is integrally formed by injection molding, and a mold used in the molding method. An auxiliary ring protruding plate 34 for protruding the end surface of the auxiliary ring 62 of the molded product 60 to the side mold 10 and an inner wall protruding plate 37 for protruding in wide surface contact with the closed-side end surface inner wall 61 of the molded product 60 are provided. The most characteristic feature is that a method is used in which both of the protruding plates are relatively protruded to the molded product 60 and the molded product 60 is released while rotating with the inclined groove of the male mold 20 as a guide. It is. Embodiments will be described below with reference to the drawings.
本発明に係る射出成形方法は、型締め工程、ノズルタッチ工程、射出工程などの一連の射出成形工程を経て射出された樹脂が、キャビティ４６内で固化したのちの型開き工程において、雌型５０の形状を成形品６０の外縁を成すアンダーカット形状を有しない略円柱穴形状とすることで、固定側金型４０と可動側金型１０を真っ直ぐ引き離して成形品６０を雌型５０から離型する。そして、雄型２０に付いた成形品６０を離型させる突き出し工程において、成形品６０の閉口側端面内壁６１と開口側端面となる補助リング６２の端面の双方に広く面接触する突き出しプレートを用いて突き出す方法である。また、係る突き出しにより、成形品６０のブレード６３を成形するために雄型２０に設けられた傾斜溝をガイドとして突き出しを案内させ、成形品６０を回転させながら離型する方法を用いている。係る方法を採用したことで、ブレード６３に圧縮力や引張力を作用させないようにして、薄いブレード部の断裂や変形、或いは残留応力の残存といった従来の問題を解決している。 The injection molding method according to the present invention includes the female mold 50 in the mold opening process after the resin injected through a series of injection molding processes such as a mold clamping process, a nozzle touch process, and an injection process is solidified in the cavity 46. By making the shape into a substantially cylindrical hole shape that does not have an undercut shape that forms the outer edge of the molded product 60, the fixed-side mold 40 and the movable-side mold 10 are pulled straight away to release the molded product 60 from the female mold 50. To do. In the projecting step of releasing the molded product 60 attached to the male mold 20, a projecting plate that is in wide surface contact with both the closed-side end surface inner wall 61 of the molded product 60 and the end surface of the auxiliary ring 62 serving as the opening-side end surface is used. It is a method to stick out. Further, in order to form the blade 63 of the molded product 60 by such projection, a method is used in which the projection is guided using an inclined groove provided in the male mold 20 as a guide, and the molded product 60 is released while rotating. By adopting such a method, the conventional problems such as tearing or deformation of the thin blade part or residual residual stress are solved by preventing the compression force or tensile force from acting on the blade 63.
図１は、本発明に係る射出成形方法に用いられるツイスト型シロッコファンの射出成形用金型１の全体構成説明図である。上が固定側金型４０、下が可動側金型１０である。図１に示したのは３プレート金型であるが、これに限定されるものではなく、２プレート金型等でもよい。また、本願発明では、アンギュラピンやサイドコア等を用いないため、構造は至ってシンプルである。なお、図１は、請求項２及び請求項５に係る突き出し機構３０を示したものであり、突き出しピン３５も備えた態様のものである。該突き出しピン３５を設けない構成では、内壁突き出しプレート３７をボス６４の近傍にできるだけ近づけ、可能な限り該内壁突き出しプレート３７と成形品６０の閉口側端面内壁６１と広く面接触させることが望ましい。 FIG. 1 is an explanatory view of the entire configuration of a mold 1 for injection molding of a twist type sirocco fan used in an injection molding method according to the present invention. The upper side is the fixed mold 40 and the lower is the movable mold 10. Although a three-plate mold is shown in FIG. 1, the present invention is not limited to this, and a two-plate mold or the like may be used. In the present invention, since the angular pin, the side core or the like is not used, the structure is very simple. FIG. 1 shows an ejecting mechanism 30 according to claims 2 and 5, and is an embodiment provided with an ejecting pin 35. In the configuration in which the protrusion pin 35 is not provided, it is desirable that the inner wall protrusion plate 37 is as close as possible to the vicinity of the boss 64 and the inner wall protrusion plate 37 and the closed-side end surface inner wall 61 of the molded product 60 are in wide surface contact as much as possible.
図１の上部に示す固定側金型４０は、固定側金型取付板４１、固定側型板４２、ロケートリング４３、スプルランナー４４、スプルブッシュ４５、キャビティ４６、ガイドブッシュ４７などの一般的な構成部材から成り、前記キャビティ４６を形成する雌型５０が配設させる。該雌型５０の形状は、成形品６０の外縁を成すアンダーカット形状を有しない略円柱穴形状であり、最小必要限度の抜き勾配等を考慮する。 The fixed mold 40 shown in the upper part of FIG. 1 is a general mold such as a fixed mold mounting plate 41, a fixed mold 42, a locating ring 43, a sprue runner 44, a sprue bush 45, a cavity 46, a guide bush 47, and the like. A female die 50, which is composed of constituent members and forms the cavity 46, is disposed. The shape of the female die 50 is a substantially cylindrical hole shape that does not have an undercut shape that forms the outer edge of the molded product 60, and takes into consideration the draft of the minimum necessary limit.
図１の下部に示す可動側金型１０は、可動側取付板１１、スペーサブロック１２、受け板１３、可動側型板１４、ガイドピン１５等の一般的な部材から構成されるが、これらに雄型２０と突き出し機構３０が配設される。該雄型２０の形状は略円柱形状であって、その外周には成形品６０となるシロッコファンのブレード６３を成形するための溝がツイスト状に掘られており、その傾斜角αは、ファンの直径と両端面間の距離との比率、ブレード６３の枚数、及び幅といった様々な要素によって左右されることから、其々の寸法において、風量や騒音等を調べ、最も良好な値を求める。但し、傾斜角αをあまり大きくし過ぎると離型の際にブレード６３に引張力や圧縮力が作用し、雄型２０の溝部をガイドとしてブレード６３を案内させて螺旋状に回転させる回動性が悪くなる。以下、一つの実施例を用いて説明すると、ファンの直径が８０ｍｍ、両端面間の距離が４０ｍｍ、ブレード６３の幅が６ｍｍ、ブレード６３の枚数が２８枚としたシロッコファンの場合では、傾斜角αが３５度を超えた辺りから、成形品６０の回動性が低下し始めるので、係る条件の下であれば、傾斜角αは３５度までとするのが良い。なお、軸芯方向に向けて傾斜角αを有しない場合（０度）と比して、傾斜角αを１５度とした場合ではブレード６３の翼面積は約３％拡張でき、傾斜角αを３５度とした場合では約１１％拡張できる。係る実施例の場合では、離型性、送風量、静音性などの各要素を総合的に判断すると、１５度が最も好ましい結果であった。 The movable mold 10 shown in the lower part of FIG. 1 is composed of general members such as a movable mounting plate 11, a spacer block 12, a receiving plate 13, a movable mold 14 and a guide pin 15. A male mold 20 and a protrusion mechanism 30 are provided. The male mold 20 has a substantially columnar shape, and a groove for forming a blade 63 of a sirocco fan to be a molded product 60 is dug in the outer periphery thereof, and the inclination angle α is determined by the fan angle. Since it depends on various factors such as the ratio of the diameter and the distance between both end faces, the number of blades 63, and the width, the air volume, noise, etc. are examined for each dimension to obtain the best value. However, if the inclination angle α is too large, a tensile force or a compressive force acts on the blade 63 at the time of mold release, and the blade 63 is guided using the groove portion of the male mold 20 as a guide to rotate in a spiral manner. Becomes worse. Hereinafter, a description will be given using one embodiment. In the case of a sirocco fan in which the fan diameter is 80 mm, the distance between both end faces is 40 mm, the width of the blade 63 is 6 mm, and the number of blades 63 is 28, the inclination angle Since the pivotability of the molded product 60 starts to decrease when α exceeds 35 degrees, the inclination angle α should be up to 35 degrees under such conditions. The blade area of the blade 63 can be expanded by about 3% when the inclination angle α is 15 degrees as compared with the case where the inclination angle α does not have an inclination angle α toward the axial direction (0 degree). In the case of 35 degrees, it can be expanded by about 11%. In the case of such an example, 15 degrees was the most preferable result when comprehensively judging each element such as releasability, air flow rate, and quietness.
突き出し機構３０は、突き出し板（下）３１、突き出し板（上）３２、エジェクタロッド（Ａ）３３、補助リング突き出しプレート３４、エジェクタロッド（Ｂ）３６、内壁突き出しプレート３７から構成され、成形品６０となるツイスト型シロッコファンのブレード６３の端部に形成される補助リング６２の端面を突き出すための前記補助リング突き出しプレート３４と、成形品６０の閉口側端面内壁６１と広く面接触させて突き出すための内壁突き出しプレート３７との双方を相対的に成形品６０に押し付ける機構を備える。 The ejection mechanism 30 includes an ejection plate (lower) 31, an ejection plate (upper) 32, an ejector rod (A) 33, an auxiliary ring ejection plate 34, an ejector rod (B) 36, and an inner wall ejection plate 37, and a molded product 60. In order to project the auxiliary ring projecting plate 34 for projecting the end surface of the auxiliary ring 62 formed at the end of the blade 63 of the twist type sirocco fan, and the inner wall 61 on the closing side end surface of the molded product 60 in wide contact with each other. A mechanism for pressing both of the inner wall protruding plate 37 and the molded product 60 relatively is provided.
また、図１から図３においては、請求項２と請求項５及びこれらを従属する請求項の突き出し機構３０を示し、前記補助リング突き出しプレート３４と前記内壁突き出しプレート３７による突き出しの他に、更に成形品６０のボス６４部近傍を突き出すための複数の突き出した突き出しピン３５も設け、該突き出しピン３５も相対的に成形品６０に押し付ける突き出し機構３０としている。例えば、ボス６４に補強のためのリブ等が設けられているような場合には、前記内壁突き出しプレート３７がリング状であると、ボス６４の近傍を押すことができず変形の原因となるため、該リブ部を避けてボス６４部近傍を突き出すための複数の突き出した突き出しピン３５を備えた構成とする。なお、突き出しの駆動に関しては図示していないが、突き出し機構３０は油圧シリンダー又はモーターにより制御する。油圧シリンダーを用いる場合であれば、圧力や吐き出し量の制御弁を手動で操作してもよいが、傾斜角αの大きさや寸法等により離型の際の成形品６０への負荷や回動状態に応じて突き出し速度を自動調整できるように、電磁弁を電気的に制御する構成が好ましい。そして更に望ましくは、離型の際の成形品６０の回動状態において、ブレード６０に生じる応力分布状態を均等化するために、負荷感応可変ポンプと電磁比例制御弁との組合などにより、突き出し圧、及び突き出し速度を電子制御により正確にコントロールして品質向上を図ることも有効である。他方、モーターを用いる場合であれば、ＰＷＭ制御やインバータ制御など、モーターの仕様に応じて回転速度等を電子制御する。これらの制御手段は特に限定されるものではないが、突き出しの際の圧力や速度等の諸条件を調整可能な仕様にしておくことが望ましい。そして、係る突き出し機構３０のモーター駆動用ドライバー等への指令は、シーケンス制御やプロセス制御等の一般的な制御手段によるプログラミングにより指令すればよい。 1 to 3 show the projecting mechanism 30 of claims 2 and 5 and claims dependent thereon, in addition to the projecting by the auxiliary ring projecting plate 34 and the inner wall projecting plate 37, A plurality of projecting pins 35 for projecting the vicinity of the boss 64 portion of the molded product 60 are also provided, and the projecting mechanism 30 that presses the projecting pins 35 relatively against the molded product 60 is also provided. For example, when the boss 64 is provided with a reinforcing rib or the like, if the inner wall protruding plate 37 is ring-shaped, the vicinity of the boss 64 cannot be pushed, causing deformation. Further, a plurality of protruding protrusion pins 35 for protruding the vicinity of the boss 64 while avoiding the rib portion are provided. Although not shown in the figure regarding the drive of the protrusion, the protrusion mechanism 30 is controlled by a hydraulic cylinder or a motor. If a hydraulic cylinder is used, the control valve for pressure and discharge amount may be manually operated, but the load on the molded product 60 and the rotation state at the time of release depending on the size and dimension of the inclination angle α. It is preferable that the solenoid valve be electrically controlled so that the ejection speed can be automatically adjusted according to the above. More preferably, in order to equalize the stress distribution state generated in the blade 60 in the rotational state of the molded product 60 at the time of mold release, an ejection pressure is obtained by a combination of a load sensitive variable pump and an electromagnetic proportional control valve. It is also effective to improve the quality by accurately controlling the ejection speed by electronic control. On the other hand, if a motor is used, the rotational speed and the like are electronically controlled according to the motor specifications such as PWM control and inverter control. These control means are not particularly limited, but it is desirable to have specifications that allow adjustment of conditions such as pressure and speed during ejection. And the instruction | command to the motor drive driver etc. of the protrusion mechanism 30 should just be instruct | indicated by programming by general control means, such as sequence control and process control.
さらに、請求項３と請求項６に係る突き出し機構３０は、図示していないが、前記補助リング突き出しプレート３４が、雄型２０に対して回動自在となる構成を採用している。具体的には、前記補助リング突き出しプレート３４の上面にスラスト玉軸受等を介し、雄型２０に対して回動自在となる構成のプレートを設け、該プレートが補助リング６２の回転に対応して回動しながら成形品６０を軸芯方向へ突き出す構成の突き出し機構３０である。なお、前記内壁突き出しプレート３７についても同様の構成として、閉口側端面内壁６１の回転に対応して回動しながら成形品６０を軸芯方向へ突き出す構成の突き出し機構３０とすれば更に有効である。 Furthermore, although not shown, the protrusion mechanism 30 according to claims 3 and 6 employs a configuration in which the auxiliary ring protrusion plate 34 is rotatable with respect to the male mold 20. Specifically, a plate configured to be rotatable with respect to the male mold 20 is provided on the upper surface of the auxiliary ring protruding plate 34 via a thrust ball bearing or the like, and the plate corresponds to the rotation of the auxiliary ring 62. It is the protrusion mechanism 30 of the structure which protrudes the molded article 60 to an axial center direction, rotating. In addition, it is more effective if the inner wall ejecting plate 37 has the same configuration as the ejecting mechanism 30 configured to project the molded product 60 in the axial direction while rotating corresponding to the rotation of the inner wall 61 of the closing side end surface. .
雄型２０は、その形状が略円柱形状で、その外周には成形品６０となるシロッコファンのブレード６３を成形するための溝が所定の傾斜角αをもってツイスト状に掘られている。また、雄型２０において、成形品６０の閉口側端面内壁６１を成形するのは内部に組み込まれた前記内壁突き出しプレート３７である。なお、最小必要限度の抜き勾配等を考慮する。 The male mold 20 has a substantially cylindrical shape, and a groove for molding a sirocco fan blade 63 to be a molded product 60 is dug in a twist shape with a predetermined inclination angle α on the outer periphery thereof. Further, in the male mold 20, it is the inner wall protruding plate 37 incorporated inside that forms the closed side end surface inner wall 61 of the molded product 60. Consider the minimum required draft angle.
図２は、本発明に係る可動側金型１０の構成説明図である。図２（Ａ）は、離型工程において、突き出し機構３０により、補助リング突き出しプレート３４と、内壁突き出しプレート３７と、更に突き出しピン３５とを相対的に成形品６０に押し付けて突き出し、成形品６０が雄型２０から離型させる状態を示しており、図２（Ｂ）は、係る突き出し前の射出工程や冷却工程等における状態を示している。 FIG. 2 is an explanatory diagram of the configuration of the movable mold 10 according to the present invention. In FIG. 2A, in the mold release process, the protruding mechanism 30 pushes the auxiliary ring protruding plate 34, the inner wall protruding plate 37, and the protruding pin 35 relatively against the molded product 60 to eject the molded product 60. Shows a state of releasing from the male mold 20, and FIG. 2B shows a state in an injection process, a cooling process, and the like before the protrusion.
図３は、本発明に係る突き出し機構３０の稼働状態説明図であり、図３（Ａ）は突き出し前、図３（Ｂ）は突き出し中、図３（Ｃ）は突き出し後の其々の状態を示している。また、図３（Ａ）〜図３（Ｃ）は、可動側金型１０に固定された雄型２０に対し、内壁突き出しプレート３７と補助リング突き出しプレート３４と突き出しピン３５とが、相対的に突き出てくる状態を示している。なお、図３（Ｃ）において、補助リング突き出しプレート３４と内壁突き出しプレート３７の下部に見えるのが、エジェクタロッド（Ａ）３３とエジェクタロッド（Ｂ）３６である。 FIG. 3 is an explanatory view of the operating state of the ejecting mechanism 30 according to the present invention, FIG. 3 (A) is before ejecting, FIG. 3 (B) is during ejecting, and FIG. 3 (C) is the state after ejecting. Is shown. 3A to 3C show that the inner wall protruding plate 37, the auxiliary ring protruding plate 34, and the protruding pin 35 are relatively located with respect to the male mold 20 fixed to the movable mold 10. The state which protrudes is shown. In FIG. 3C, the ejector rod (A) 33 and the ejector rod (B) 36 are visible below the auxiliary ring ejecting plate 34 and the inner wall projecting plate 37.
図４は、本発明に係る射出成形方法及び金型によって成形される成形品６０のツイスト型シロッコファンの構成説明図であり、回転軸芯を中心として円周に配置された複数のブレード６３は、軸芯方向から所定の傾斜角αをもって、閉口側端面から開口側端部の補助リング６２を結ぶように配置され、該ブレード６３と補助リングの結合部には、剛性向上等のためのリブが設けられている。寸法については前記の通り、用途やスペースに対応した直径やブレードの長さ等、必要に応じた値とし、傾斜角αについても、流体力学等に基づく設計に始まり、コンピュータ解析によるシュミレーション、更には風洞実験などを行い、適切な値を求めて最終的に決定する。素材はコスト、成形性、或いは品質等を考慮すれば、熱可塑性樹脂を用いるのが一般的であるといえ、例えば、ポリプロピレン（Polypropylene）、ＡＢＳ樹脂（Acrylonitrile Butadiene
Styrene）、ポリカーボネート樹脂 (Polycarbonate)、ＡＳ樹脂（Acrylonitrile Styrene）、ＰＡ樹脂（Polyamide）、ＰＢＴ樹脂（Poly Buthylene Terephthalete）、ＰＰＳ樹脂（Poly Phenylene Sulfide）などを用いることが考え得る。ただし、本発明に係る成形品６０のシロッコファンは一体成形され、組立のための接着等は必要としないため、熱硬化性樹脂でも製作は可能である。
FIG. 4 is an explanatory view of the structure of a twist type sirocco fan of a molded product 60 molded by the injection molding method and the mold according to the present invention, and a plurality of blades 63 arranged around the rotation shaft center. The auxiliary ring 62 is connected to the opening side end portion from the closing side end surface with a predetermined inclination angle α from the axial direction, and a rib for improving rigidity or the like is provided at the connecting portion of the blade 63 and the auxiliary ring. Is provided. As described above, the dimensions and the blade length corresponding to the application and space are as required, and the inclination angle α starts from the design based on fluid dynamics, simulation by computer analysis, Conduct wind tunnel experiments, etc., and finally determine the appropriate value. In consideration of cost, moldability, quality, etc., it is common to use a thermoplastic resin. For example, polypropylene (Polypropylene), ABS resin (Acrylonitrile Butadiene)
Styrene), polycarbonate resin (Polycarbonate), AS resin (Acrylonitrile Styrene), PA resin (Polyamide), PBT resin (Poly Buthylene Terephthalete), PPS resin (Poly Phenylene Sulfide), etc. can be considered. However, since the sirocco fan of the molded product 60 according to the present invention is integrally molded and does not require adhesion for assembly, it can be manufactured using a thermosetting resin.
１ ツイスト型シロッコファンの射出成形用金型
１０ 可動側金型
１１ 可動側取付板
１２ スペーサブロック
１３ 受け板
１４ 可動側型板
１５ ガイドピン
２０ 雄型
３０ 突き出し機構
３１ 突き出し板（下）
３２ 突き出し板（上）
３３ エジェクタロッド（Ａ）
３４ 補助リング突き出しプレート
３５ 突き出しピン
３６ エジェクタロッド（Ｂ）
３７ 内壁突き出しプレート
４０ 固定側金型
４１ 固定側金型取付板
４２ 固定側型板
４３ ロケートリング
４４ スプルランナー
４５ スプルブッシュ
４６ キャビティ
４７ ガイドブッシュ
５０ 雌型
６０ 成形品
６１ 閉口側端面内壁
６２ 補助リング
６３ ブレード
６４ ボス
α 傾斜角
DESCRIPTION OF SYMBOLS 1 Twist type sirocco fan injection molding die 10 Movable side die 11 Movable side mounting plate 12 Spacer block 13 Receiving plate 14 Movable side die plate 15 Guide pin 20 Male die 30 Ejecting mechanism 31 Ejecting plate (lower)
32 Extrusion board (top)
33 Ejector rod (A)
34 Auxiliary ring ejection plate 35 Ejection pin 36 Ejector rod (B)
37 Inner wall protruding plate 40 Fixed side mold 41 Fixed side mold mounting plate 42 Fixed side mold plate 43 Locating ring 44 Spru runner 45 Sprue bush 46 Cavity 47 Guide bush 50 Female mold 60 Molded product 61 Closure side end face inner wall 62 Auxiliary ring 63 Blade 64 Boss α Tilt angle
Claims (6)
型締め工程、ノズルタッチ工程、射出工程、型開き工程などの一連の射出成形工程を経た後、キャビティー内で固化し、雄型に付いた成形品を離型させる突き出し工程において、
可動側金型には、前記補助リング端面を突き出すための補助リング突き出しプレートと、成形品の閉口側端面内壁と広く面接触させて突き出すための内壁突き出しプレートとを其々設けて、これら双方の突き出しプレートを相対的に成形品に押し付けることにより成形品を突き出すと共に、成形品のブレード部を成形する雄型の傾斜溝をガイドとして成形品を回転させながら離型させる方法を用いることを特徴とするツイスト型シロッコファンの射出成形方法。 A molding method in which a plurality of blades are inclined in a twisted manner with respect to the axial direction, and a resin twist type sirocco fan having an auxiliary ring on the outer periphery of the opening side is integrally formed by injection molding,
After a series of injection molding processes such as mold clamping process, nozzle touch process, injection process, mold opening process, etc., in the extrusion process that solidifies in the cavity and releases the molded product attached to the male mold,
The movable side mold is provided with an auxiliary ring protruding plate for protruding the auxiliary ring end surface, and an inner wall protruding plate for protruding in close contact with the inner wall of the closed side end surface of the molded product. The method uses a method in which the molded product is ejected by pressing the ejection plate relatively against the molded product, and the mold is released while rotating the molded product using the male inclined groove for molding the blade portion of the molded product as a guide. A method for injection molding of twisted sirocco fans.
雄型と突き出し機構が配置される可動側金型と、
雌型が配置される固定側金型とから成り、
前記雌型の形状は、成形品の外縁を成すアンダーカット形状を有しない略円柱穴形状であり、
前記雄型の形状は、略円柱形状であり、その外周には成形品となるシロッコファンのブレード部を成形するための溝がツイスト状に掘られており、
前記突き出し機構は、
成形品となるツイスト型シロッコファンのブレード端部に形成される補助リングの端面を突き出すための補助リング突き出しプレートと、成形品の閉口側端面内壁と広く面接触させて突き出すための内壁突き出しプレートとの双方を相対的に成形品に押し付ける機構を採用したことを特徴とするツイスト型シロッコファンの射出成形用金型。
The twist type sirocco according to claim 1, wherein a plurality of blades are inclined in a twisted manner with respect to the axial direction, and a resin twist type sirocco fan having an auxiliary ring on the outer periphery of the opening end is integrally formed by injection molding. A mold used in a fan injection molding method,
A movable mold in which a male mold and a protruding mechanism are arranged ;
It consists of a fixed mold on which a female mold is placed,
The shape of the female mold is a substantially cylindrical hole shape that does not have an undercut shape that forms the outer edge of the molded product,
The shape of the male mold is a substantially cylindrical shape, and a groove for forming a blade part of a sirocco fan that is a molded product is dug in a twist shape on the outer periphery thereof,
The protruding mechanism is
An auxiliary ring protruding plate for protruding the end surface of the auxiliary ring formed at the blade end of the twist type sirocco fan to be a molded product, and an inner wall protruding plate for protruding in close contact with the inner wall of the closed side end surface of the molded product A mold for injection molding of a twist type sirocco fan characterized by adopting a mechanism that relatively presses both of them against the molded product.
前記請求項４に係る前記突き出し機構において、
前記補助リング突き出しプレートと前記内壁突き出しプレートによる突き出し機構の他に、更に成形品のボス部近傍を突き出すための複数の突き出した突き出しピンによる突き出し機構も相対的に成形品に押し付ける突き出し機構であることを特徴とする請求項４に記載のツイスト型シロッコファンの射出成形用金型。
A mold used in an injection molding method of a twist type sirocco fan according to claim 2,
In the protrusion mechanism according to claim 4 ,
In addition to the protrusion mechanism by the auxiliary ring protrusion plate and the inner wall protrusion plate, the protrusion mechanism by a plurality of protruding protrusion pins for protruding the vicinity of the boss portion of the molded product is also a thrust mechanism that relatively presses the molded product. The mold for injection molding of the twist type sirocco fan according to claim 4.
前記請求項４又は請求項５に係る前記突き出し機構において、
前記補助リング突き出しプレートが、雄型に対して回動自在となる構成を採用した突き出し機構であることを特徴とする請求項４又は請求項５に記載のツイスト型シロッコファンの射出成形用金型。
A mold used in an injection molding method of a twist type sirocco fan according to claim 3,
In the protrusion mechanism according to claim 4 or claim 5 ,
6. The mold for injection molding of a twist type sirocco fan according to claim 4 or 5, wherein the auxiliary ring protruding plate is a protruding mechanism adopting a structure that is rotatable with respect to the male mold. .
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| JP2012158753A JP5230040B1 (en) | 2012-07-17 | 2012-07-17 | Twist-type sirocco fan injection molding method and molding die |
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| JP2012158753A JP5230040B1 (en) | 2012-07-17 | 2012-07-17 | Twist-type sirocco fan injection molding method and molding die |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104552785B (en) * | 2014-09-19 | 2016-10-05 | 重庆开确科技有限公司 | Electric heating wire type band for fan leaf cools down injection upper mold |
Citations (4)
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|---|---|---|---|---|
| JPH05277694A (en) * | 1992-03-30 | 1993-10-26 | Nissan Motor Co Ltd | Mold for rotary body with inclined blade |
| JPH10138255A (en) * | 1996-11-12 | 1998-05-26 | Sumitomo Bakelite Co Ltd | Molding method |
| JPH11138589A (en) * | 1997-11-07 | 1999-05-25 | Aisin Chem Co Ltd | Molding die device for overlapping fan |
| JP2001099092A (en) * | 1999-10-04 | 2001-04-10 | Sanwa Plastic:Kk | Multi-blades blowing fan |
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2012
- 2012-07-17 JP JP2012158753A patent/JP5230040B1/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH05277694A (en) * | 1992-03-30 | 1993-10-26 | Nissan Motor Co Ltd | Mold for rotary body with inclined blade |
| JPH10138255A (en) * | 1996-11-12 | 1998-05-26 | Sumitomo Bakelite Co Ltd | Molding method |
| JPH11138589A (en) * | 1997-11-07 | 1999-05-25 | Aisin Chem Co Ltd | Molding die device for overlapping fan |
| JP2001099092A (en) * | 1999-10-04 | 2001-04-10 | Sanwa Plastic:Kk | Multi-blades blowing fan |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104552785B (en) * | 2014-09-19 | 2016-10-05 | 重庆开确科技有限公司 | Electric heating wire type band for fan leaf cools down injection upper mold |
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| JP2014019022A (en) | 2014-02-03 |
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