JP2009090472A - Hollow body with burring structure and burring method - Google Patents

Hollow body with burring structure and burring method Download PDF

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JP2009090472A
JP2009090472A JP2007260385A JP2007260385A JP2009090472A JP 2009090472 A JP2009090472 A JP 2009090472A JP 2007260385 A JP2007260385 A JP 2007260385A JP 2007260385 A JP2007260385 A JP 2007260385A JP 2009090472 A JP2009090472 A JP 2009090472A
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burr
hollow body
cutting
duct
burring
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JP5448319B2 (en
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Kohei Tozaki
浩平 戸崎
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Kyoraku Co Ltd
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Kyoraku Co Ltd
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Abstract

<P>PROBLEM TO BE SOLVED: To provide a burring structure and a method for burring which can prevent deformation strain of a cutting blade due to the load applied on a burr cutting portion from spreading to the periphery, and largely improve the dimension accuracy of an opening part. <P>SOLUTION: A duct 1 is a hollow body having the burring structure for cutting the unnecessary burr 2 of the blow molded resin made hollow body after blow molding. A burr cutting portion 4 of the duct 1 is provided with a deflection suppressing structure 5 at least at the burr 2 side or the product part (body part side) along the portion. The deflection suppressing structure 5 at the burr 2 side along the burr cutting portion 4 of the duct 1 is composed of one or many recessed parts 6 composing a reinforcing rib. <P>COPYRIGHT: (C)2009,JPO&INPIT

Description

本発明は、ブロー成形された樹脂製の中空体の不要部分であるバリ（捨て袋と称されることもある）をブロー成形後に切断するためのバリ除去構造を備えた中空体およびそのバリ除去方法に関するものである。   The present invention relates to a hollow body having a burr removing structure for cutting a burr (also referred to as a waste bag), which is an unnecessary part of a blow molded resin hollow body, after blow molding, and its burr removal It is about the method.

車両に装備される空調用その他のダクトは、ブロー成形された樹脂製の中空体で構成されることが多いが、ブロー成形された中空体をダクトとするには、ブロー成形時に生じる閉じた不要部分であるバリを除去する必要がある（特開昭５７−１９９６２７号公報、特公平３−５６８８８号公報、特開昭６３−１２９２４０号公報参照）。
特開昭５７−１９９６２７号公報 特公平３−５６８８８号公報 特開昭６３−１２９２４０号公報 Other air conditioning ducts installed in vehicles are often made of blow-molded resin hollow bodies, but in order to use blow-molded hollow bodies as ducts, it is not necessary to be closed during blow molding. It is necessary to remove the burr which is a part (refer to Japanese Patent Laid-Open Nos. 57-199627, 3-56888, and 63-129240).
JP-A-57-199627 Japanese Patent Publication No. 3-56888 JP-A-63-129240

前掲の特開昭５７−１９９６２７号公報に記載されているように、ブロー成形された中空体のバリを除去するには、中空体のバリ切断部位に切断刃を当てて前進させる工程によりバリ切断部位を剪断するが、中空体のバリ切断部位は中空であるうえその部分には切断刃による荷重が加わるので、中空体のバリ切断部位およびその周辺に変形歪みが生じ、そのままの状態でバリ切断部位が剪断されるので、中空体のバリを除去した開口部が所期の形状に仕上がらないという問題があった。   As described in JP-A-57-199627, in order to remove burrs from a blow-molded hollow body, the burrs are cut by a process of applying a cutting blade to the burr cutting portion of the hollow body and moving it forward. Although the part is sheared, the burr cutting part of the hollow body is hollow and the load by the cutting blade is applied to that part, so deformation deformation occurs in the burr cutting part of the hollow body and its surroundings, and burr cutting is performed as it is. Since the site was sheared, there was a problem that the opening from which the burrs of the hollow body were not finished to the desired shape.

そこで本発明は、このような問題点を解消しようとするものであって、中空体のバリ切断部位に沿って少なくともバリ側または製品側に撓み抑制構造を備えることにより、中空体のバリ切断部位に切断刃を押し当てて剪断する過程でバリ切断部位に加わる荷重による変形歪みが周辺に波及するのを防止し、開口部の寸法精度を大きく向上させることができるバリ除去構造を備えた中空体およびそのバリ除去方法を提供するものである。   Therefore, the present invention intends to solve such a problem, and includes a burr cutting part of the hollow body by providing a bending suppressing structure on at least the burr side or the product side along the burr cutting part of the hollow body. A hollow body with a burr removal structure that prevents deformation distortion due to the load applied to the burr cutting site during the process of pressing and cutting the cutting blade on the periphery and greatly improving the dimensional accuracy of the opening. And a burr removal method thereof.

上記目的を達成するための本発明の請求項１に係るバリ除去構造を備えた中空体は、ブロー成形された樹脂製の中空体の不要部分であるバリをブロー成形後に切断するためのバリ除去構造を備えた中空体であって、中空体のバリ切断部位には、それに沿って少なくともバリ側または製品側に撓み抑制構造を備えていることを特徴とするものである。   To achieve the above object, a hollow body having a burr removal structure according to claim 1 of the present invention is a burr removal for cutting a burr which is an unnecessary part of a blow molded resin hollow body after blow molding. A hollow body having a structure is characterized in that a burr cutting portion of the hollow body is provided with a warp suppressing structure on at least the burr side or the product side along it.

本発明の請求項２に係るバリ除去構造を備えた中空体は、請求項１の構成において、中空体のバリ切断部位に沿う撓み抑制構造は、補強リブで構成されていることを特徴とするものである。   A hollow body having a burr removing structure according to claim 2 of the present invention is characterized in that, in the configuration of claim 1, the deflection suppressing structure along the burr cutting portion of the hollow body is constituted by a reinforcing rib. Is.

本発明の請求項３に係るバリ除去構造を備えた中空体は、請求項２の構成において、撓み抑制構造を構成する補強リブは、１つまたは２つ以上の凹部で成ることを特徴とするものである。   A hollow body having a burr removing structure according to claim 3 of the present invention is characterized in that, in the configuration of claim 2, the reinforcing ribs constituting the deflection suppressing structure are composed of one or more recesses. Is.

また、本発明の請求項４に係るバリ除去構造を備えた中空体のバリ除去方法は、ブロー成形された樹脂製の中空体の不要部分であるバリをブロー成形後に切断する中空体のバリ除去方法であって、中空体はバリ切断部位に沿って少なくともバリ側または製品側に撓み抑制構造を備えており、中空体のバリ切断部位を固定して切断刃を切断部位に押し当てることによりバリ切断部位を剪断することを特徴とするものである。   Moreover, the deburring method for a hollow body provided with the deburring structure according to claim 4 of the present invention is a deburring process for a hollow body in which a burr that is an unnecessary part of a blow molded resin hollow body is cut after blow molding. The hollow body is provided with a deflection suppressing structure at least on the burr side or on the product side along the burr cutting site, and the burr is fixed by pressing the cutting blade against the cutting site after fixing the burr cutting site of the hollow body. The cutting site is sheared.

本発明によれば、中空体のバリ切断部位に沿って少なくともバリ側または製品側に撓み抑制構造を備えることにより、中空体のバリ切断部位に切断刃を押し当てて剪断する過程でバリ切断部位に加わる荷重による変形歪みが周辺に波及するのを防止し、開口部の寸法精度を大きく向上させることができる効果が得られるものである。   According to the present invention, a burr cutting site is provided in the process of pressing and shearing the cutting blade against the burr cutting site of the hollow body by providing a deflection suppressing structure at least on the burr side or the product side along the burr cutting site of the hollow body. It is possible to prevent the deformation distortion due to the load applied on the periphery from spreading to the periphery and to greatly improve the dimensional accuracy of the opening.

図面は本発明に係る中空体として車両に備える空調用のダクトについて例示している。図１はダクトの要部を示す側面図、図２は同上平面図、図３は図２のＡ−Ａ断面図、図４はダクトのブロー成形態様を示す断面図、図５はブロー成形後のダクトのバリ除去態様示す要部の断面図、図６はダクトの連結態様を一部破断して示す平面図である。   The drawings illustrate air conditioning ducts provided in a vehicle as a hollow body according to the present invention. 1 is a side view showing the main part of the duct, FIG. 2 is a plan view of the same, FIG. 3 is a sectional view taken on line AA of FIG. 2, FIG. 4 is a sectional view showing a blow molding aspect of the duct, and FIG. Sectional drawing of the principal part which shows the burr | flash removal aspect of the duct of FIG. 6, FIG.

図１ないし図３に示すように、ブロー成形されたダクト１は、ダクトの本体部分に対して一端側が屈曲していて、その一端側はバリ２により閉じられている。このバリ２はダクト１を構成するうえで不要部分であるから、ブロー成形後に切断して除去する。３はパーティングラインであってブロー金型の合わせ面に形成される。図示のダクト１はその一端側が屈曲しているものであるから、ブロー成形の中心軸が屈曲している。このため、バリ２の正確な除去が難しいものである。   As shown in FIGS. 1 to 3, the blow-molded duct 1 is bent at one end side with respect to the main body portion of the duct, and the one end side is closed by a burr 2. Since this burr 2 is an unnecessary part for constituting the duct 1, it is cut and removed after blow molding. A parting line 3 is formed on the mating surface of the blow mold. Since the illustrated duct 1 has one end bent, the blow-molded central axis is bent. For this reason, it is difficult to accurately remove the burrs 2.

ブロー成形されたダクト１において、４は周囲を取り巻くバリ切断部位であり、このバリ切断部位４に沿ってバリ２側には撓み抑制構造５を備えている。この撓み抑制構造５は、バリ切断部位４に対してバリ２側に形成した補強リブで構成されており、撓み抑制構造５を構成する補強リブは、２つの正方形状の浅い凹部６から成るものである。補強リブの凹部６は２つに限らず１つであっても、また３つ以上であってもよく、必ずしも正方形状に限らず適宜の形状とすることができる。補強リブを構成する凹部６は、図１に示すようにパーティングライン３と略直交する方向に形成されている。補強リブ５を構成する凹部６は、バリ切断部位４に対してバリ２側にかえて製品側（ダクト本体部分側）に形成してもよく、またバリ２側および製品側の両方に形成してもよい。   In the blow-molded duct 1, reference numeral 4 denotes a burr cutting portion that surrounds the periphery, and a deflection suppressing structure 5 is provided on the burr 2 side along the burr cutting portion 4. This bending suppression structure 5 is composed of a reinforcing rib formed on the burr 2 side with respect to the burr cutting portion 4, and the reinforcing rib constituting the bending suppression structure 5 is composed of two square-shaped shallow recesses 6. It is. The number of the recesses 6 of the reinforcing rib is not limited to two, but may be one or three or more, and is not necessarily limited to a square shape, and may have an appropriate shape. The recess 6 constituting the reinforcing rib is formed in a direction substantially orthogonal to the parting line 3 as shown in FIG. The recess 6 constituting the reinforcing rib 5 may be formed on the product side (duct body portion side) instead of the burr cutting portion 4 on the burr 2 side, and may be formed on both the burr 2 side and the product side. May be.

本発明に係るダクト１は、高密度ポリエチレン、ポリプロピレン又はそれらの樹脂に低密度ポリエチレン、エチレン−プロピレンランダム重合体を配合したポリオレフィン樹脂などブロー成形可能な樹脂で構成される。   The duct 1 according to the present invention is made of a resin that can be blow-molded, such as high-density polyethylene, polypropylene, or polyolefin resin in which low-density polyethylene or ethylene-propylene random polymer is blended with those resins.

図１ないし図３に示すダクト１は、図５に示すようにブロー成形される。図５において７はブロー成形金型、８は吹き込みノズルである。ブロー成形金型７によりブロー成形されたダクト１は、その一端側がバリ２により閉じられている。このバリ２はダクト１を構成するうえで不要部分であるから、ブロー成形後に切断して除去する。バリ２の切断には図５に示すようにバリ取り治具９を用いるが、バリ取り治具９は、ダクト１のバリ２の部分を固定するバリ固定部１０、切断刃１１およびその移動案内溝１２を備えている。   The duct 1 shown in FIGS. 1 to 3 is blow-molded as shown in FIG. In FIG. 5, 7 is a blow mold and 8 is a blow nozzle. The duct 1 blow-molded by the blow molding die 7 is closed at one end by a burr 2. Since this burr 2 is an unnecessary part for constituting the duct 1, it is cut and removed after blow molding. As shown in FIG. 5, a deburring jig 9 is used for cutting the burr 2. The deburring jig 9 uses a burr fixing portion 10 for fixing the burr 2 portion of the duct 1, a cutting blade 11 and its movement guide. A groove 12 is provided.

ダクト１の不要分であるバリ２を除去するにあたっては、バリ取り治具のバリ固定部１０に、ダクト１のバリ２の部分を、バリ切断部位４が切断刃１１の移動案内溝１２に対応するように装着して固定状態とする。次いでダクト１のバリ切断部位３およびその周辺部分をバリ取り治具９に固定して、切断刃１１をバリ切断部位３に押し当てるべく移動させ、バリ切断部位３を切断刃１１により剪断してダクト１からバリ２を除去する。   When removing the burr 2 which is an unnecessary part of the duct 1, the burr 2 of the duct 1 corresponds to the burr fixing part 10 of the deburring jig, and the burr cutting part 4 corresponds to the movement guide groove 12 of the cutting blade 11. Install it in a fixed state. Next, the burr cutting part 3 of the duct 1 and its peripheral part are fixed to the deburring jig 9, the cutting blade 11 is moved to press against the burr cutting part 3, and the burr cutting part 3 is sheared by the cutting blade 11. The burr 2 is removed from the duct 1.

バリ２を除去したダクト１はその一端が開口するので、ダクト１の一端には、例えば図６に示すように延長ダクト１３を嵌合接続して一連のダクトを構成する。   Since one end of the duct 1 from which the burr 2 is removed is opened, an extension duct 13 is fitted and connected to one end of the duct 1 as shown in FIG. 6, for example, to form a series of ducts.

本発明の一実施の形態によれば、ダクト１のバリ切断部位４に沿ってそのバリ２側に撓み抑制構造５を有しているので、ダクト１のバリ切断部位４に切断刃１１を押し当てて剪断する過程でバリ切断部位４に加わる荷重による変形歪みが周辺に波及するのが防止され、バリ切断部位４は切断刃１１により整然とした態様で剪断される。特にバリ２の正確な除去が難しいブロー成形の中心軸が屈曲しているダクト１であってもバリ切断部位４を切断刃１１により整然と切断することができる。このためダクト１の開口部は所期の形状に仕上がり、その寸法精度が大きく向上することになる。   According to the embodiment of the present invention, the burr cutting portion 4 of the duct 1 is provided with the bending restraining structure 5 on the burr 2 side, so that the cutting blade 11 is pushed against the burr cutting portion 4 of the duct 1. The deformation strain due to the load applied to the burr cutting part 4 in the process of applying and shearing is prevented from spreading to the periphery, and the burr cutting part 4 is sheared by the cutting blade 11 in an orderly manner. In particular, the burr cutting portion 4 can be cut in an orderly manner by the cutting blade 11 even in the duct 1 in which the center axis of blow molding is difficult to accurately remove the burr 2. For this reason, the opening part of the duct 1 is finished in an expected shape, and its dimensional accuracy is greatly improved.

なお、本発明に係るバリ除去構造を備えた中空体は、一端に成形後は不要となる捨て袋などのバリを備えた筒状部を有するものであれば、ダクトのほかタンク、チューブ、トレイ、カバーブーツ、ドレンパン等のブロー成形品に適用できる。そして、本発明に係るバリ除去構造を備えた中空体は、軟質のものから硬質のものまで種々のものがある。   The hollow body provided with the burr removing structure according to the present invention has a duct, a tank, a tube, and a tray in addition to a duct as long as it has a cylindrical part provided with a burr such as a discarded bag that is unnecessary after molding. It can be applied to blow molded products such as cover boots and drain pans. And the hollow body provided with the burr | flash removal structure which concerns on this invention has various things from a soft thing to a hard thing.

ダクトの要部を示す側面図である。It is a side view which shows the principal part of a duct. 同上平面図である。It is a top view same as the above. 図２のＡ−Ａ断面図である。It is AA sectional drawing of FIG. ダクトのブロー成形態様を示す断面図である。It is sectional drawing which shows the blow molding aspect of a duct. ブロー成形後のダクトのバリ除去態様示す要部の断面図である。It is sectional drawing of the principal part which shows the burr | flash removal aspect of the duct after blow molding. ダクトの連結態様を一部破断して示す平面図である。It is a top view which fractures | ruptures and shows the connection aspect of a duct.

符号の説明Explanation of symbols

１ ダクト
２ バリ
３ パーティングライン
４ バリ切断部位
５ 撓み抑制構造
６ 補強リブを構成する凹部
７ ブロー成形金型
８ 吹き込みノズル
９ バリ取り治具
１０ バリ固定部
１１ 切断刃
１２ 移動案内溝
１３ 延長ダクト DESCRIPTION OF SYMBOLS 1 Duct 2 Burr 3 Parting line 4 Burr cutting part 5 Deflection structure 6 Recessed rib forming part 7 Blow molding die 8 Blowing nozzle 9 Deburring jig 10 Burr fixing part 11 Cutting blade 12 Moving guide groove 13 Extension duct

Claims (4)

ブロー成形された樹脂製の中空体の不要部分であるバリをブロー成形後に切断するためのバリ除去構造を備えた中空体であって、
中空体のバリ切断部位には、それに沿って少なくともバリ側または製品側に撓み抑制構造を備えていること
を特徴とするバリ除去構造を備えた中空体。 A hollow body having a burr removing structure for cutting a burr that is an unnecessary part of a blown resin hollow body after blow molding,
A hollow body provided with a burr removing structure characterized in that a burr cutting portion of the hollow body is provided with a warp suppressing structure on at least a burr side or a product side along the burr cutting portion. 中空体のバリ切断部位に沿う撓み抑制構造は、補強リブで構成されていることを特徴とする請求項１記載のバリ除去構造を備えた中空体。   The hollow body provided with the burr removing structure according to claim 1, wherein the deflection suppressing structure along the burr cutting portion of the hollow body is constituted by a reinforcing rib. 撓み抑制構造を構成する補強リブは、１つまたは２つ以上の凹部で成ることを特徴とする請求項２記載のバリ除去構造を備えた中空体。   The hollow body provided with the burr removing structure according to claim 2, wherein the reinforcing rib constituting the deflection suppressing structure is composed of one or more concave portions. ブロー成形された樹脂製の中空体の不要部分であるバリをブロー成形後に切断する中空体のバリ除去方法であって、
中空体はバリ切断部位に沿って少なくともバリ側または製品側に補強構造を備えており、
中空体のバリ切断部位を固定して切断刃を切断部位に押し当てることによりバリ切断部位を剪断すること
を特徴とする中空体のバリ除去方法。 A method for removing burrs from a hollow body, which is a process of cutting a burr that is an unnecessary part of a blow molded resin hollow body after blow molding,
The hollow body has a reinforcement structure on at least the burr side or the product side along the burr cutting site,
A method for removing a burr from a hollow body, comprising fixing the burr cutting site of the hollow body and shearing the burr cutting site by pressing a cutting blade against the cutting site.
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JP2018179357A (en) * 2017-04-07 2018-11-15 キョーラク株式会社 Formed part and method of manufacturing the same

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