JP2002086550A - Thermoforming method, box-shaped formed body, and forming apparatus - Google Patents
Thermoforming method, box-shaped formed body, and forming apparatusInfo
- Publication number
- JP2002086550A JP2002086550A JP2000276587A JP2000276587A JP2002086550A JP 2002086550 A JP2002086550 A JP 2002086550A JP 2000276587 A JP2000276587 A JP 2000276587A JP 2000276587 A JP2000276587 A JP 2000276587A JP 2002086550 A JP2002086550 A JP 2002086550A
- Authority
- JP
- Japan
- Prior art keywords
- frame
- shaped
- box
- molding
- plug
- 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
Landscapes
- Blow-Moulding Or Thermoforming Of Plastics Or The Like (AREA)
- Sink And Installation For Waste Water (AREA)
- Bathtubs, Showers, And Their Attachments (AREA)
- Moulds For Moulding Plastics Or The Like (AREA)
Abstract
Description
【０００１】[0001]
【発明の属する技術分野】本発明は熱成形法、箱状成形
体および成形装置に関する。さらに詳しくは、浴槽、シ
ンク、洗面ボールなどの合成樹脂製容器を製造するため
の箱状成形体の熱成形法および成形装置に関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a thermoforming method, a box-shaped molded body and a molding apparatus. More specifically, the present invention relates to a thermoforming method and a molding apparatus for a box-shaped molded product for producing a synthetic resin container such as a bathtub, a sink, and a washbasin.
【０００２】[0002]
【従来の技術】従来より、アクリル樹脂製浴槽は、所定
の温度に加熱軟化させたアクリル樹脂シートを、図１２
に示されるように真空成形と型押しによって所望の浴槽
形状（箱状）に成形させた箱状成形体５１に、裏張りの
補強材としてガラス繊維強化プラスチック（ＦＲＰ）ま
たは熱可塑性樹脂発泡体などが設けられている。また前
記箱状成形体５１は、図１３に示されるように開口部の
周辺に折り返し縁付きフランジ５２を有している。2. Description of the Related Art Conventionally, an acrylic resin bathtub is provided with an acrylic resin sheet heated and softened to a predetermined temperature, as shown in FIG.
As shown in the figure, a box-shaped molded body 51 formed into a desired bathtub shape (box-shaped) by vacuum molding and embossing, a glass fiber reinforced plastic (FRP) or a thermoplastic resin foam as a reinforcing material for the backing Is provided. As shown in FIG. 13, the box-shaped molded body 51 has a flange 52 with a folded edge around the opening.
【０００３】[0003]
【発明が解決しようとする課題】このように、折り返し
縁付きフランジを有する箱状成形体は、今まで雌型を用
いて真空成形法によって生産されている。型材としてア
ルミニウムが主として使用されるが、精密、かつ高品質
の成形体を得るためには、良質のアルミニウム材を用い
て、高度な機械加工と熟練工の手仕上げが必要である。
型製作に要する日数は１ヵ月半から２ヵ月を要する。し
たがって、型の製作コストは高価となる。As described above, a box-shaped formed body having a flange with a folded edge has been produced by a vacuum forming method using a female mold. Aluminum is mainly used as a mold material. However, in order to obtain a precise and high-quality molded product, it is necessary to use a high-quality aluminum material and perform advanced machining and manual finishing by skilled workers.
It takes one and a half to two months for mold making. Therefore, the manufacturing cost of the mold is high.
【０００４】またいくらコストをかけて製作した雌型に
も完全に無疵は期し難く、また使用中に発生する疵もあ
る。この型を鋳物で作った場合に鬆が発生しやすく、あ
と加工でこれを除去しようとしても完全には除去するこ
とができない。その上ゴミやホコリが付着した場合、こ
れを挟んで成形すると、それに包まれる空気の膨張によ
り細かいバブルが発生し、とくに透明板を成形したとき
には、これがアバタ状となって内側より透視できる。ま
た雌型を用いて真空成形した成形体は、図１２および図
１４に示されるように、表面側の底部（奥部）、とくに
面と面とが接する稜線のエッジ部５３が交差するコーナ
ー部５４の肉厚が極端に薄くなり、これを防ごうとして
厚い原板を使うとか、複雑な加熱のコントロールなどの
方法をとる必要がある。またフランジ５２に原板の厚さ
に近い厚さが残りやすく、同様に複雑な加熱のコントロ
ールなどの方法をとる必要がある。したがって、いずれ
にしてもコストアップにつながるという問題がある。[0004] In addition, it is difficult to completely eliminate defects in a female mold manufactured at a high cost, and there are some defects generated during use. When this mold is made of a casting, porosity tends to occur, and it cannot be completely removed even if it is removed by post-processing. In addition, if dust or dust adheres, if it is sandwiched and molded, fine bubbles are generated due to the expansion of the air surrounded by the dust. Especially when a transparent plate is molded, it becomes an avatar shape and can be seen through from the inside. Further, as shown in FIGS. 12 and 14, a molded body vacuum-formed using a female mold has a bottom (rear part) on the front side, in particular, a corner where an edge 53 of a ridge line where the surfaces come into contact with each other intersects. The thickness of 54 becomes extremely thin. To prevent this, it is necessary to use a thick original plate or take a method such as complicated heating control. In addition, a thickness close to the thickness of the original plate is likely to remain on the flange 52, and it is necessary to take a similar method of controlling heating. Therefore, there is a problem that the cost is increased in any case.
【０００５】本発明は、叙上の事情に鑑み、従来の成形
法で得られる成形体よりも肉厚が均一で、かつ外観が優
れた、開口部の周辺に折り返し縁付きフランジを有する
箱状成形体を得るための熱成形法および成形装置を提供
することを目的とする。In view of the circumstances described above, the present invention provides a box-shaped molding having a uniform thickness and a better appearance than a molded body obtained by a conventional molding method and having a flange with a folded edge around an opening. An object of the present invention is to provide a thermoforming method and a molding apparatus for obtaining a body.
【０００６】[0006]
【課題を解決するための手段】本発明の熱成形法は、加
熱軟化されたプラスチック板から、開口部の周辺に折り
返し縁付きフランジを有する箱状成形体を成形する熱成
形法であって、前記箱状成形体の表面側の内部形状と寸
法を精密に模すために必要な稜線のエッジ部と底部のコ
ーナー部および折り返し縁付きフランジを賦形するため
の外枠を有し、上下に移動自在な可動体に取り付けられ
た表面成形用フレーム状プラグと、前記箱状成形体の裏
面側の形状と寸法を精密に模すために必要な稜線のエッ
ジ部と開口部のコーナー部を有し、上下に移動自在な可
動体に取り付けられた裏面成形用フレーム状プラグとを
上下に配置し、ついでクランプ枠で周辺部が固定され、
かつ所定の温度に加熱されたプラスチック板を前記表面
成形用フレーム状プラグと裏面成形用フレーム状プラグ
のあいだに配置し、つぎにそれぞれのフレーム状プラグ
を相互にクランプ枠をこえて上下に押し込んで箱状成形
体を成形することを特徴とする。The thermoforming method according to the present invention is a thermoforming method for forming a box-shaped body having a flange with a folded edge around an opening from a heat-softened plastic plate, It has an outer frame for shaping the ridge edge, bottom corner, and folded edge flange required to accurately mimic the internal shape and dimensions on the front side of the box-shaped molded body, and can move up and down freely A frame-shaped plug for surface shaping attached to a movable body, and an edge portion of a ridgeline and a corner portion of an opening necessary to accurately imitate the shape and dimensions of the back surface of the box-shaped formed body, A frame-shaped plug for back-side molding attached to a movable body that can move up and down is arranged up and down, then the peripheral part is fixed with a clamp frame,
And a plastic plate heated to a predetermined temperature is disposed between the front surface forming frame-shaped plug and the rear surface forming frame-shaped plug, and then the respective frame-shaped plugs are vertically pushed over each other over the clamp frame. It is characterized by forming a box-shaped molded body.
【０００７】また本発明の箱状成形体は、請求項１、
２、３または４記載の熱成形法により得られることを特
徴とする。Further, the box-shaped molded article of the present invention is characterized in that
It is obtained by the thermoforming method described in 2, 3, or 4.
【０００８】さらに本発明の成形装置は、加熱軟化され
たプラスチック板から、開口部の周辺に折り返し縁付き
フランジを有する箱状成形体を成形する成形装置であっ
て、前記箱状成形体の表面側の内部形状と寸法を精密に
模すために必要な稜線のエッジ部と底部のコーナー部お
よび折り返し縁付きフランジを賦形するための外枠を有
し、上下に移動自在な可動体に取り付けられた表面成形
用フレーム状プラグと、前記箱状成形体の裏面側の形状
と寸法を精密に模すために必要な稜線のエッジ部と開口
部のコーナー部を有し、上下に移動自在な可動体に取り
付けられた裏面成形用フレーム状プラグと、前記表面成
形用フレーム状プラグと裏面成形用フレーム状プラグの
あいだに所定の温度に加熱されたプラスチック板を配置
するクランプ枠とを備えてなることを特徴とする。Further, the molding apparatus of the present invention is a molding apparatus for molding a box-shaped molded article having a flange with a folded edge around an opening from a heat-softened plastic plate. It has an outer frame for shaping the edge part of the ridge line, the corner part of the bottom part, and the flange with the folded edge necessary for precisely imitating the internal shape and dimensions of the, and was attached to a movable body that can move up and down A movable body that has a surface-shaped frame-shaped plug and a ridge edge portion and an opening corner portion necessary for precisely imitating the shape and dimensions of the back surface side of the box-shaped molded body, and is movable up and down. And a clamp frame for disposing a plastic plate heated to a predetermined temperature between the front surface forming frame-shaped plug and the rear surface forming frame-shaped plug. Comprising characterized by comprising.
【０００９】[0009]
【発明の実施の形態】以下、添付図面に基づいて本発明
の熱成形法、箱状成形体および成形装置を説明する。DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, a thermoforming method, a box-shaped molded body and a molding apparatus according to the present invention will be described with reference to the accompanying drawings.
【００１０】図１は本発明の一実施の形態にかかわる成
形装置を示す部分断面図、図２は図１における表面成形
用フレーム状プラグの部分断面斜視図、図３は図１にお
ける裏面成形用フレーム状プラグの部分断面斜視図、図
４は本発明の熱成形法の一例を説明する図、図５は表面
成形用フレーム状プラグの他の実施の形態を示す斜視
図、図６は裏面成形用フレーム状プラグの他の実施の形
態を示す斜視図、図７は箱状成形体の裏面側の展開図、
図８は図７の長手方向中央の肉厚を測定した肉厚分布、
図９は図７の短手方向中央の肉厚を測定した肉厚分布、
図１０はグリース塗布成形による図７の長手方向中央の
肉厚を測定した肉厚分布、図１１はグリース塗布成形に
よる図７の短手方向中央の肉厚を測定した肉厚分布であ
る。FIG. 1 is a partial sectional view showing a molding apparatus according to an embodiment of the present invention, FIG. 2 is a partial sectional perspective view of a frame-shaped plug for surface molding in FIG. 1, and FIG. FIG. 4 is a view for explaining an example of the thermoforming method of the present invention, FIG. 5 is a perspective view showing another embodiment of a frame-shaped plug for surface shaping, and FIG. FIG. 7 is a perspective view showing another embodiment of the frame-shaped plug for use, FIG.
FIG. 8 is a thickness distribution obtained by measuring the thickness at the center in the longitudinal direction of FIG. 7,
FIG. 9 is a thickness distribution obtained by measuring the thickness at the center in the lateral direction of FIG.
FIG. 10 is a thickness distribution obtained by measuring the thickness at the center in the longitudinal direction of FIG. 7 by grease application molding, and FIG. 11 is a thickness distribution obtained by measuring the thickness at the center in the short direction of FIG. 7 by grease application molding.
【００１１】本発明の一実施の形態にかかわる成形装置
は、加熱軟化されたプラスチック板を成形して開口部の
周辺に折り返し縁付きフランジを有する箱状成形体（図
１２参照）を得る装置であり、図１〜３に示されるよう
に表面成形用フレーム状プラグ１、裏面成形用フレーム
状プラグ２、外枠３およびクランプ枠４を備えている。
またこの成形装置は、表面成形用フレーム状プラグ１お
よび外枠３の下降（押し下げ）速度、下降距離、下降タ
イミング、保持時間などや、裏面成形用フレーム状プラ
グ２の上昇（押し上げ）速度、上昇距離、上昇タイミン
グ、保持時間などを制御するコントローラーを備えてい
る。A molding apparatus according to an embodiment of the present invention is an apparatus for molding a heat-softened plastic plate to obtain a box-shaped molded body having a flange with a folded edge around an opening (see FIG. 12). As shown in FIGS. 1 to 3, a frame-shaped plug 1 for surface molding, a frame-shaped plug 2 for rear surface molding, an outer frame 3 and a clamp frame 4 are provided.
In addition, the molding apparatus includes a lowering (push-down) speed, a lowering distance, a lowering timing, a holding time, etc. of the front-surface forming frame-shaped plug 1 and the outer frame 3, and a rising (push-up) speed, rising, It has a controller that controls the distance, ascent timing, holding time, etc.
【００１２】前記表面成形用フレーム状プラグ１は、リ
ング状を呈しており、箱状成形体の表面側の内部形状と
寸法を精密に模すために必要な稜線のエッジ部５と底部
のコーナー部６を有し、上下に移動自在な可動体７に、
たとえば周辺板と基板とからなる支持具または複数の棒
状の支持具８などを介して取り付けられている。また該
可動体７には、前記箱状成形体のフランジの折り返し部
を成形するための外枠３が前記表面成形用フレーム状プ
ラグ１の周辺に、たとえば周辺板と基板とからなる支持
具９または複数の棒状の支持具などを介して設けられて
いる。The surface-shaped frame-shaped plug 1 has a ring shape, and has a ridge edge 5 and a bottom corner required to accurately simulate the internal shape and dimensions on the front side of the box-shaped molded body. A movable body 7 having a portion 6 and movable up and down,
For example, it is attached via a support consisting of a peripheral plate and a substrate or a plurality of rod-like supports 8. The movable body 7 is provided with an outer frame 3 for forming a folded portion of the flange of the box-shaped formed body around the frame-shaped plug 1 for surface forming, for example, a support 9 comprising a peripheral plate and a substrate. Or it is provided via a plurality of rod-shaped supports.
【００１３】前記裏面成形用フレーム状プラグ２は、箱
状成形体の裏面側の形状と寸法を精密に模すために必要
な稜線のエッジ部１０と開口部のコーナー部１１および
外周部のコーナー部１４を有し、上下に移動自在な可動
体１２に、たとえば周辺板と基板とからなる支持具１３
または複数の棒状の支持具などを介して取り付けられて
いる。The frame-shaped plug 2 for forming a back surface is provided with an edge portion 10 of a ridge line, a corner portion 11 of an opening portion, and a corner of an outer peripheral portion, which are necessary for accurately imitating the shape and size of the back surface side of the box-shaped formed body. A movable member 12 having a portion 14 and movable up and down, a support 13 comprising, for example, a peripheral plate and a substrate.
Alternatively, it is attached via a plurality of rod-like supports.
【００１４】前記表面成形用フレーム状プラグ１および
裏面成形用フレーム状プラグ２は、木材、樹脂または金
属から作製されており、これらのフレーム状プラグ１、
２は継ぎ目なく全部一体に作られたものが好ましいが、
ばらばらに作製した複数の部材を組立てて作ることもで
きる。この場合、継ぎ目が成形体の品質を低下させぬよ
うに、たとえば凹凸嵌合などにより密着させる必要があ
る。試作品などの生産個数が少ない成形の場合は、木片
を使って簡単に作れるが、生産個数が多い場合には、硬
質の木、ガラス繊維または炭素繊維で補強したポリエス
テルやエポキシなどの熱硬化性樹脂またはアルミニウム
などの金属で作製するのが好ましい。The front surface forming frame-shaped plug 1 and the rear surface forming frame-shaped plug 2 are made of wood, resin or metal.
It is preferable that 2 is made integrally and seamlessly,
It is also possible to assemble and produce a plurality of members made separately. In this case, it is necessary that the joints be closely adhered to each other by, for example, fitting of unevenness so that the quality of the molded body is not deteriorated. In the case of molding with a small number of prototypes, it can be easily made using wood chips, but in the case of large numbers of products, thermosetting materials such as hard wood, polyester or epoxy reinforced with glass fiber or carbon fiber It is preferably made of resin or metal such as aluminum.
【００１５】さらにこれらのフレーム状プラグ１、２
が、成形時に加熱軟化したプラスチック板Ｐに最初に接
触する際に、その部分のプラスチック板Ｐの熱を吸収し
て局部的にプラスチック板Ｐの有する延伸（エロンゲー
ション(elongation)）を抑制して、ドラッグマークを発
生させることがあるので、これらのフレーム状プラグ
１、２を作製する素材は熱伝導の低いものを選ぶ必要が
あり、金属を使用するときは、電熱線を内蔵させてこれ
を適温にまで加熱して用いるのが好ましい。Further, these frame-like plugs 1, 2
However, when the plastic plate P first contacts the heat-softened plastic plate at the time of molding, the heat of the plastic plate P in that portion is absorbed to locally suppress the elongation of the plastic plate P (elongation). Since a drag mark may be generated, it is necessary to select a material having low heat conductivity for producing these frame-shaped plugs 1 and 2. When using a metal, a heating wire is built in and used. It is preferable to use it by heating it to an appropriate temperature.
【００１６】前記可動体７、１２は、ボールねじ、歯車
群またはカム機構などを用いた昇降機構と、成形時の圧
力を支えるための前記支持具８、９、１３を含むケース
構造体から構成することができる。このケース構造体の
骨組みは、金属のアングル状、チャンネル状またはパイ
プ状の鋼材を用いて作製することができる。The movable bodies 7 and 12 are composed of a lifting / lowering mechanism using a ball screw, a gear group or a cam mechanism, and a case structure including the supports 8, 9 and 13 for supporting pressure during molding. can do. The frame of the case structure can be manufactured using a metal material in the form of a metal angle, channel, or pipe.
【００１７】前記クランプ枠４は、前記表面成形用フレ
ーム状プラグ１と裏面成形用フレーム状プラグ２のあい
だに所定の温度に加熱されたプラスチック板Ｐを配置
し、固定するものである。The clamp frame 4 arranges and fixes a plastic plate P heated to a predetermined temperature between the front surface forming frame-shaped plug 1 and the rear surface forming frame-shaped plug 2.
【００１８】本発明の熱成形法は、開口部に折り返し縁
付きフランジを有する多面体の箱状成形体を、一枚のプ
ラスチック板で一体に成形する方法であり、雄型および
雌型も使用せず、また真空・圧空などの空気圧をも使用
しない熱成形法である。すなわち図４に示されるように
前記箱状成形体の内側と同形状の稜線のエッジ部とコー
ナー部を模して作製された前記表面成形用フレーム状プ
ラグ１および外枠３で、成形温度まで加熱軟化したプラ
スチック板Ｐを押し下げるとともに、前記箱状成形体の
外側と同形状の稜線のエッジ部とコーナー部を模して作
製された前記裏面成形用フレーム状プラグ２でプラスチ
ック板Ｐを押し上げる。このときのフレーム状プラグ２
の押し上げのタイミングとしては、フレーム状プラグ１
および外枠３が下がりきった後が好ましい。The thermoforming method of the present invention is a method of integrally molding a polyhedral box-shaped molded body having a flange with a folded edge at an opening with a single plastic plate, without using a male mold and a female mold. It is a thermoforming method that does not use air pressure such as vacuum or compressed air. That is, as shown in FIG. 4, the surface-forming frame-shaped plug 1 and the outer frame 3 which are manufactured by imitating the edges and corners of the ridge line having the same shape as the inside of the box-shaped molded body, up to the molding temperature. The plastic plate P which has been softened by heating is pushed down, and the plastic plate P is pushed up by the frame-shaped plug 2 for back-side molding, which is produced by imitating the edges and corners of the ridges having the same shape as the outside of the box-shaped molded body. Frame-shaped plug 2 at this time
The push-up timing of the frame-shaped plug 1
And after the outer frame 3 is completely lowered.
【００１９】前記プラスチック板Ｐを押し上げ（押し下
げ）の際、プラスチック板Ｐの有する抗張力を保持した
状態で延伸して、プラスチック板Ｐを表面成形用フレー
ム状プラグ１の外側を滑らせ、その摩擦抵抗で底部のコ
ーナー部の薄肉化を抑制するとともに、プラスチック板
Ｐを裏面成形用フレーム状プラグ２の外側を滑らせ、フ
ランジの折り返し部の厚肉化を抑制して、箱状成形体全
体の厚さの配分を行なっている。When the plastic plate P is pushed up (pressed down), it is stretched while maintaining the tensile strength of the plastic plate P, and the plastic plate P is slid on the outside of the frame-shaped plug 1 for surface molding, and its frictional resistance is increased. In addition to suppressing the thinning of the bottom corners, the plastic plate P is slid on the outside of the frame-shaped plug 2 for forming the back surface, and the thickness of the folded portion of the flange is suppressed, and the thickness of the entire box-shaped molded body is reduced. We are doing the distribution of the.
【００２０】本実施の形態におけるフレーム状プラグ
１、２および外枠３は、いわばシート成形の場合の型の
役目を果たすわけであるが、真空または圧空などの空気
圧を全く使用しないため、逆にこのことがプラスチック
板Ｐの有する抗張力を保持した状態で延伸して、フレ−
ム状プラグの有する表面の疵や微細な凹凸をコピーせ
ず、美しい平面を原板のまま保持させることができる。The frame-shaped plugs 1, 2 and the outer frame 3 in this embodiment play a role of a mold in the case of sheet molding, but do not use any air pressure such as vacuum or compressed air. This stretches while maintaining the tensile strength of the plastic plate P, and
A beautiful flat surface can be held as it is without copying the surface flaws or fine irregularities of the rubber plug.
【００２１】また本実施の形態における熱成形法におい
て、図４に示される箱状成形体の内部側Ａを密閉系と
し、プラスチック板Ｐのスプリングバック力に見合った
空気圧で加圧することにより箱状成形体の稜線のエッジ
部と底部のコーナー部を除いた部分、すなわち表面成形
用フレーム状プラグ１の形状の無い部分が、プラスチッ
ク板Ｐのスプリングバック力により内側へ湾曲すること
を防ぐことができる。In the thermoforming method according to the present embodiment, the inner side A of the box-shaped molded body shown in FIG. 4 is made a closed system, and the box-shaped body is pressurized with air pressure corresponding to the springback force of the plastic plate P. It is possible to prevent the portion excluding the edge portion of the ridgeline and the corner portion of the bottom of the molded body, that is, the portion having no shape of the surface-forming frame-shaped plug 1 from being bent inward due to the springback force of the plastic plate P. .
【００２２】箱状成形体の内部側Ａを密閉系とする方法
の一例としては、外枠３の支持具９を複数の棒状ではな
く、一つの箱状にすることが考えられる。As an example of a method of making the inner side A of the box-shaped molded body a closed system, it is conceivable that the support 9 of the outer frame 3 is not a plurality of rods but a single box.
【００２３】また本実施の形態における熱成形法におい
て、特定の面だけを曲線にしたいときは、その面のフレ
ーム状プラグの形状を設計通りの曲面とし、同じような
工程でフレーム状プラグを作動し、真空を全く使用せず
に成形後の冷却を行なえば、この面はフレーム状プラグ
の形状通りの曲線に成形され、その上空圧が全くかかっ
ていないので、フレーム状プラグの有する微細な凹凸は
シートにかかる抗張力によりコピーされず、美しい曲面
が得られる。In the thermoforming method according to the present embodiment, when it is desired to curve only a specific surface, the shape of the frame-shaped plug on that surface is set as a designed curved surface, and the frame-shaped plug is operated in the same process. However, if cooling after forming is performed without using any vacuum, this surface is formed into a curve according to the shape of the frame-shaped plug, and there is no air pressure on it, so the fine irregularities of the frame-shaped plug Is not copied due to tensile strength applied to the sheet, and a beautiful curved surface is obtained.
【００２４】また本実施の形態における熱成形法におい
て、プラスチック板Ｐとして、マスキングフィルム付き
シートを使用する場合、前記フレーム状プラグ１、２お
よび外枠３の表面にシリコーンオイルやパラフィンワッ
クスなどのグリースを塗布して成形することもできる。
そして成形後、成形体からマスキングフィルムを剥離し
て、箱状成形体を得る。このグリースを塗布することに
より、フレーム状プラグ１、２および外枠３とマスキン
グフィルムとのあいだの滑りがよくなるため、箱状成形
体にフレーム状プラグ１、２および外枠３の跡がなくな
り外観がさらに良好になる。In the thermoforming method according to the present embodiment, when a sheet with a masking film is used as the plastic plate P, a grease such as silicone oil or paraffin wax is formed on the surfaces of the frame-shaped plugs 1 and 2 and the outer frame 3. Can be applied and molded.
Then, after molding, the masking film is peeled from the molded body to obtain a box-shaped molded body. By applying this grease, the sliding between the frame-shaped plugs 1 and 2 and the outer frame 3 and the masking film is improved, so that the box-shaped molded body has no trace of the frame-shaped plugs 1 and 2 and the outer frame 3 and has an appearance. Is further improved.
【００２５】本発明の熱成形法は、成形体の内側の形状
と寸法を常に一定に正確に保持した品質を得ることがで
きることにある。それは、この箱状成形体を補強する工
程で極めて重要な要素となるからである。すなわち本発
明では、プラスチック板の有する抗張力を保持した状態
で延伸して、プラスチック板を表面成形用フレーム状プ
ラグの外側を滑らせ、その摩擦抵抗で底部のコーナー部
の薄肉化を抑制することにより、厚さを均一にすること
ができる。[0025] The thermoforming method of the present invention is to obtain a quality in which the shape and dimensions of the inside of a formed body are always kept exactly constant. This is because it becomes a very important element in the step of reinforcing this box-shaped molded body. That is, in the present invention, the plastic plate is stretched while retaining the tensile strength, and the plastic plate is slid on the outside of the frame-shaped plug for surface forming, and the frictional resistance of the plastic plate suppresses the thinning of the bottom corner portion. , The thickness can be made uniform.
【００２６】これに対し、従来の雌形でプラスチック板
に真空成形法を用いて成形する場合には、成形体の外側
の形状と寸法は雌型の内側に直接軟化したプラスチック
板が密着し冷却されるので、完全に雌型内面の壁面をコ
ピーしたものになるが、これに用いられる材料シートの
厚さの誤差、成形条件の誤差による局部的延伸ムラに起
因する厚さの配分ムラなどにより、成形品内側の形状や
寸法は、完全に安定した状態のものを常時生産すること
は難しい。On the other hand, when a conventional female mold is formed on a plastic plate by a vacuum molding method, the outer shape and dimensions of the molded product are such that the softened plastic plate adheres directly to the inside of the female mold and is cooled. Therefore, the wall of the inner surface of the female mold is completely copied.However, due to errors in the thickness of the material sheet used for this, uneven thickness distribution due to local stretching unevenness due to errors in molding conditions, etc. In addition, it is difficult to always produce a completely stable shape and dimension inside the molded product.
【００２７】つぎに本発明におけるフレーム状プラグの
他の実施の形態を説明する。図５に示されるように表面
成形用フレーム状プラグ２１は、箱状成形体の表面側の
内部形状と寸法を精密に模すために必要な稜線のエッジ
部２２と底部のコーナー部２３を有し、上下に移動自在
な可動体に周辺板２４ａおよび基板２４ｂからなる支持
具２４を介して取り付けられる。また該支持具２４の基
板２４ｂには、前記箱状成形体のフランジの折り返し部
を成形するための外枠２５が前記表面成形用フレーム状
プラグ２１の周辺における前記基板２４ｂに設けられて
いる。前記表面成形用フレーム状プラグ２１は、フレー
ム状プラグ底部の一部に矩形の開口部２６がくりぬかれ
ており、開口部２６以外のフレーム状プラグ底部に空気
孔２７が形成されている。また支持具２４の周辺板２４
ａの側面にも、矩形の開口部２８がくりぬかれている。Next, another embodiment of the frame plug according to the present invention will be described. As shown in FIG. 5, the surface forming frame-shaped plug 21 has a ridge edge portion 22 and a bottom corner portion 23 necessary for accurately imitating the internal shape and dimensions on the front side of the box-shaped formed body. Then, it is attached to a movable body that can move up and down via a support 24 composed of a peripheral plate 24a and a substrate 24b. An outer frame 25 for forming a folded portion of the flange of the box-shaped molded body is provided on the substrate 24b of the support 24 on the substrate 24b around the surface-shaped frame plug 21. The surface-forming frame-shaped plug 21 has a rectangular opening 26 formed in a part of the frame-shaped plug bottom, and an air hole 27 formed in the frame-shaped plug bottom other than the opening 26. The peripheral plate 24 of the support 24
A rectangular opening 28 is also cut out on the side surface a.
【００２８】また図６に示されるように裏面成形用フレ
ーム状プラグ３０は、箱状成形体の裏面側の形状と寸法
を精密に模すために必要な稜線のエッジ部３１と開口部
のコーナー部３２を有し、上下に移動自在な可動体に基
板の支持具３３を介して取り付けられる。前記裏面成形
用フレーム状プラグ３０は、内周面がわずかに内側に傾
斜されており、その周辺部の四隅に空気孔３４が形成さ
れている。As shown in FIG. 6, the frame-shaped plug 30 for forming the back surface has a ridge edge 31 and a corner of an opening necessary for accurately imitating the shape and dimensions of the back surface of the box-shaped body. It has a portion 32 and is attached to a movable body that can move up and down via a substrate support 33. The frame-shaped plug 30 for forming the back surface has an inner peripheral surface slightly inclined inward, and air holes 34 are formed at four corners of the peripheral portion.
【００２９】なお、本実施の形態における裏面成形用フ
レーム状プラグでは、底部が開口する形状に形成されて
いるが、本発明においては、底部が形成された裏面成形
用フレーム状プラグとすることもできる。Although the back-side molding frame-shaped plug in the present embodiment is formed to have a shape in which the bottom is opened, the present invention may use a back-side molding frame-shaped plug in which the bottom is formed. it can.
【００３０】[0030]
【実施例】つぎに本発明の実施例を説明するが、本発明
はかかる実施例のみに限定されるものではない。EXAMPLES Next, examples of the present invention will be described, but the present invention is not limited to only these examples.
【００３１】実施例１〜３ まずつぎの表１に示すような表面成形用フレーム状プラ
グおよび外枠の上型ならびに裏面成形用フレーム状プラ
グの下型を作製した。ついでこれらの上型および下型を
配置する成形装置を用意した。Examples 1 to 3 First, a frame-shaped plug for surface molding, an upper mold for the outer frame, and a lower mold for the frame-shaped plug for molding the back as shown in Table 1 below were prepared. Next, a molding device for disposing the upper mold and the lower mold was prepared.
【００３２】[0032]
【表１】 [Table 1]
【００３３】そして成形条件として、表面成形用フレー
ム状プラグを下降速度１５０〜３００ｍｍ／ｓｅｃで、
１８０〜２００度の温度に加熱された、部分架橋のＰＭ
ＭＡ（ポリメタクリル酸メチル）樹脂を連続成形した厚
さ３ｍｍのキャスト板（ＰＭＭＡ樹脂シート）を押し下
げるとともに、表面成形用フレーム状プラグが下がりき
った後に、裏面成形用フレーム状プラグを上昇速度１５
０〜３００ｍｍ／ｓｅｃで前記ＰＭＭＡ樹脂シートを押
し上げて、外枠および裏面成形用フレーム状プラグによ
り開口部の周辺に折り返し縁付きフランジを有する箱状
成形体を成形した。また、比較用として従来の真空成形
を行ない箱状成形体を得た（比較例）。As the molding conditions, the frame-shaped plug for surface molding is lowered at a speed of 150 to 300 mm / sec.
Partially crosslinked PM heated to a temperature of 180-200 degrees
A 3 mm thick cast plate (PMMA resin sheet) formed by continuously molding MA (polymethyl methacrylate) resin is pushed down, and after the front surface forming frame-shaped plug is completely lowered, the rear surface forming frame-shaped plug is raised at a rising speed of 15 mm.
The PMMA resin sheet was pushed up at 0 to 300 mm / sec, and a box-shaped formed body having a flange with a folded edge around the opening was formed by the outer frame and the frame-shaped plug for forming the back surface. For comparison, conventional vacuum forming was performed to obtain a box-shaped formed body (Comparative Example).
【００３４】この箱状成形体を裏面側から見たときの展
開図を図７に示す。図７において、Ａ〜Ｋは長手方向中
央部の測定位置であり、ＦおよびＬ〜Ｕは短手方向中央
部の測定位置である。FIG. 7 is a development view of the box-shaped molded body when viewed from the back side. In FIG. 7, A to K are measurement positions at the center in the longitudinal direction, and F and L to U are measurement positions at the center in the short direction.
【００３５】ついで各測定位置の肉厚（ｍｍ）を測定し
た結果を図８〜９に示す。実施例１〜３は、従来技術の
比較例と比較して肉厚変動が少ないのがわかる。比較例
は最小肉厚０．２５ｍｍ、最大肉厚２．６２ｍｍ、その
差（範囲）は２．３７ｍｍであった。これに対し、実施
例２は最小肉厚０．５６ｍｍ、最大肉厚２．１９ｍｍ、
その差（範囲）は１．６３ｍｍであり、肉厚のばらつき
は６９％（１．６３／２．３７×１００）に減少してい
る。FIGS. 8 and 9 show the results of measuring the thickness (mm) of each measurement position. It can be seen that Examples 1 to 3 have a smaller variation in wall thickness than the comparative example of the prior art. In the comparative example, the minimum thickness was 0.25 mm and the maximum thickness was 2.62 mm, and the difference (range) was 2.37 mm. In contrast, Example 2 had a minimum thickness of 0.56 mm, a maximum thickness of 2.19 mm,
The difference (range) is 1.63 mm, and the thickness variation is reduced to 69% (1.63 / 2.37 × 100).
【００３６】したがって、肉厚が均一で、かつ外観が優
れた箱状成形体を得ることができる。Therefore, a box-shaped molded article having a uniform thickness and excellent appearance can be obtained.
【００３７】実施例４ つぎに前記ＰＭＭＡ樹脂シートにマスキングフィルムを
付着させたシートを用いて、前記実施例２の表面成形用
フレーム状プラグ、外枠および裏面成形用フレーム状プ
ラグの表面にグリースを塗布して成形した。そして成形
後、マスキングフィルムを剥離して、箱状成形品を得
た。そして長手方向および短手方向の中央部の肉厚を測
定した。その結果と前記実施例２とをあわせて図１０〜
１１に示す。本実施例４は前記実施例２よりもさらに肉
厚変動が少なくなっているのがわかる。実施例２の最小
肉厚と最大肉厚の差（範囲）が１．６３ｍｍであるのに
対し、実施例４はそれが１．５０ｍｍとなっている。ま
た、グリースを塗布することにより、フレーム状プラグ
とマスキングフィルムとのあいだの滑りがよくなるた
め、箱状成形体にフレーム状プラグの跡がなくなり外観
がさらに良好になる。ＰＭＭＡ樹脂シートとフレーム状
プラグのあいだにマスキングフィルムがあることも外観
を良好にすることの助けとなっている。Example 4 Next, using a sheet in which a masking film was adhered to the PMMA resin sheet, grease was applied to the surface of the frame-shaped plug for forming a surface, the outer frame, and the frame-shaped plug for forming a back surface of Example 2 above. It was applied and molded. Then, after molding, the masking film was peeled off to obtain a box-shaped molded product. Then, the thickness of the central part in the longitudinal direction and the lateral direction was measured. 10 together with the results and Example 2 above.
11 is shown. It can be seen that the fourth embodiment has a smaller variation in thickness than the second embodiment. The difference (range) between the minimum thickness and the maximum thickness in Example 2 is 1.63 mm, whereas that in Example 4 is 1.50 mm. In addition, since the slip between the frame-shaped plug and the masking film is improved by applying grease, the box-shaped molded body has no trace of the frame-shaped plug, and the appearance is further improved. The presence of a masking film between the PMMA resin sheet and the frame plug also helps to improve appearance.
【００３８】なお、本実施の形態では、表面成形用フレ
ーム状プラグと裏面成形用フレーム状プラグを上下に配
置しているが、成形設備の相違により、表面成形用フレ
ーム状プラグと裏面成形用フレーム状プラグを上下逆に
する場合もあり、または加熱方法の違いにより、表面成
形用フレーム状プラグと裏面成形用フレーム状プラグを
左右方向に配置して作動させることもできる。In this embodiment, the front surface forming frame-shaped plug and the rear surface forming frame-shaped plug are arranged vertically, but the front surface forming frame-shaped plug and the rear surface forming frame are different depending on the molding equipment. The shape plug may be turned upside down, or depending on the heating method, the front surface forming frame-shaped plug and the rear surface forming frame-shaped plug may be arranged and operated in the left-right direction.
【００３９】またこれらの箱状成形体は、バスタブ、冷
蔵庫の内箱、鏡付き化粧棚または洗面器などに利用され
るが、いずれの場合でもプラスチック板より成形した箱
状成形体は、そのままでは剛性がなくて使用に耐えない
ので、これを凹凸の型で挟み凹サイドの型よりウレタン
やポリエステルなどの熱硬化性樹脂を注入するか、高圧
で熱可塑性樹脂を射出するなどして補強される。[0039] These box-shaped molded articles are used for bathtubs, inner boxes of refrigerators, decorative cabinets with mirrors, or washbasins. In any case, box-shaped molded articles formed of plastic plates are used as they are. Since it is not rigid and can not be used, it is reinforced by sandwiching it with an uneven mold, injecting a thermosetting resin such as urethane or polyester from the concave side mold, or injecting a thermoplastic resin at high pressure .
【００４０】この場合、雌型で得た箱状成形体を外側よ
り補強する従来では、補強型の雄型に該箱状成形体をか
ぶせる際に問題を生じていた。すなわち少し寸法が小さ
くて入らない、大きすぎて隙間を残すか、または形状が
一致しないかという問題が生じ、もし不一致のまま補強
型を閉じ、外側より（補強型の雌型側より）補強材を注
入（または射出）すれば、箱状成形体を破断するか、ま
たはしわを生ずるなどの問題が発生していた。その際ガ
ラスファイバーを混入して補強するが、とくに射出成形
でバックアップする際は、冷却時の収縮を正確に計算
し、これを見込んだ正確な内側の形状と寸法が要求され
ていた。これに対して、本実施の形態におけるフレーム
状プラグを使用すると正確な寸法の成形品が得易く、ま
た一部不具合が生じた場合でも、フレーム状プラグの一
部を調整して容易に修正が可能である。In this case, in the related art in which the box-shaped molded body obtained from the female mold is reinforced from the outside, there has been a problem when the box-shaped molded body is covered on the reinforcing male mold. In other words, there is a problem that the dimensions are slightly small and cannot be inserted, the dimensions are too large to leave a gap, or the shapes do not match. If the shapes are not matched, the reinforcing mold is closed, and the reinforcing material from the outside (from the female mold side of the reinforcing mold) Injecting (or injecting) the powder, the box-shaped molded body is broken or wrinkles are caused. At that time, glass fiber is mixed to reinforce, but when backing up by injection molding, the shrinkage at the time of cooling is accurately calculated, and an accurate inner shape and dimensions taking this into account have been required. On the other hand, when the frame-shaped plug according to the present embodiment is used, it is easy to obtain a molded product with accurate dimensions. It is possible.
【００４１】また従来では雌型によらず、雄型をアルミ
ニウムなどの金属から機械加工で製作して真空成形で該
箱状成形体を成形する方法もあるが、この場合箱状成形
体の内側の形状と寸法は雌型に比し正確なものを得られ
るが、空気による予張工程や真空作動のコントロールな
どの極めて微妙なコントロールを要し、厚さの制御が困
難であるため、普通雄型成形法は採用されていない。ま
た雄型が前記の利点はあるが、同じく真空でシートが金
型に密着するので、成形品には疵やゴミがそのままコピ
ーされやすい。これに対して、本実施の形態では、フレ
ーム状プラグで成形されるため、美麗なる成形体が得ら
れやすい。また型製作コストも低下し、製作期間も短く
なる。Conventionally, there is also a method in which a male mold is manufactured from a metal such as aluminum without using a female mold, and the box-shaped molded body is formed by vacuum forming. Although the shape and size of the mold can be obtained more accurately than the female mold, it requires extremely delicate control such as pre-stretching process with air and control of vacuum operation, and it is difficult to control the thickness. No molding method has been adopted. Although the male mold has the above-mentioned advantage, the sheet is closely adhered to the mold by the vacuum, so that the flaws and dust are easily copied to the molded product as it is. On the other hand, in the present embodiment, since it is molded with the frame-shaped plug, a beautiful molded body is easily obtained. Also, the mold manufacturing cost is reduced and the manufacturing period is shortened.
【００４２】[0042]
【発明の効果】以上説明したとおり、本発明によれば、
従来の成形法で得られる成形体よりも肉厚が均一で、か
つ外観が優れた、開口部の周辺に折り返し縁付きフラン
ジを有する成形体を得ることができる。As described above, according to the present invention,
It is possible to obtain a molded article having a uniform thickness and a better appearance than the molded article obtained by the conventional molding method and having a flange with a folded edge around the opening.
【００４３】また、本発明によれば、従来の欠陥を除去
して、型具費を大幅に引き下げることが可能となるとと
もに、型具製作に要する日数を短縮できる。Further, according to the present invention, it is possible to greatly reduce the cost of the tool by removing the conventional defect, and to shorten the number of days required for manufacturing the tool.
【図１】本発明の一実施の形態にかかわる成形装置を示
す部分断面図である。FIG. 1 is a partial sectional view showing a molding apparatus according to an embodiment of the present invention.
【図２】図１における表面成形用フレーム状プラグの部
分断面斜視図である。FIG. 2 is a partial cross-sectional perspective view of the surface-shaped frame-shaped plug in FIG.
【図３】図１における裏面成形用フレーム状プラグの部
分断面斜視図である。FIG. 3 is a partial sectional perspective view of the frame-shaped plug for molding a back surface in FIG. 1;
【図４】本発明の熱成形法の一例を説明する図である。FIG. 4 is a diagram illustrating an example of the thermoforming method of the present invention.
【図５】表面成形用フレーム状プラグの他の実施の形態
を示す斜視図である。FIG. 5 is a perspective view showing another embodiment of a frame-shaped plug for surface shaping.
【図６】裏面成形用フレーム状プラグの他の実施の形態
を示す斜視図である。FIG. 6 is a perspective view showing another embodiment of a frame-shaped plug for molding a back surface.
【図７】箱状成形体の裏面側の展開図である。FIG. 7 is a developed view of the back surface side of the box-shaped molded body.
【図８】図７の長手方向中央の肉厚を測定した肉厚分布
である。FIG. 8 is a thickness distribution obtained by measuring the thickness at the center in the longitudinal direction of FIG. 7;
【図９】図７の短手方向中央の肉厚を測定した肉厚分布
である。9 is a wall thickness distribution obtained by measuring the wall thickness at the center in the lateral direction of FIG. 7;
【図１０】グリース塗布成形による図７の長手方向中央
の肉厚を測定した肉厚分布である。10 is a wall thickness distribution obtained by measuring the wall thickness at the center in the longitudinal direction of FIG. 7 by grease application molding.
【図１１】グリース塗布成形による図７の短手方向中央
の肉厚を測定した肉厚分布である。11 is a wall thickness distribution obtained by measuring the wall thickness at the center in the lateral direction of FIG. 7 by grease application molding.
【図１２】従来の箱状成形体を示す斜視図である。FIG. 12 is a perspective view showing a conventional box-shaped molded body.
【図１３】図１２における箱状成形体の要部断面図であ
る。FIG. 13 is a sectional view of a main part of the box-shaped molded body in FIG.
【図１４】従来の成形法による肉厚変動を示す図であ
る。FIG. 14 is a view showing a thickness variation by a conventional molding method.
１ 表面成形用フレーム状プラグ ２ 裏面成形用フレーム状プラグ ３ 外枠 ４ クランプ枠 ５、１０ エッジ部 ６、１１、１４ コーナー部 ７、１２ 可動体 ８、９、１３ 支持具 Ｐ プラスチック板 DESCRIPTION OF SYMBOLS 1 Frame plug for surface shaping 2 Frame plug for back shaping 3 Outer frame 4 Clamp frame 5, 10 Edge part 6, 11, 14 Corner part 7, 12 Movable body 8, 9, 13 Support P Plastic plate
───────────────────────────────────────────────────── フロントページの続き (51)Int.Cl.7 識別記号 ＦＩ テーマコート゛(参考） Ｅ０３Ｃ 1/18 Ｅ０３Ｃ 1/18 // Ｂ２９Ｌ 22:00 Ｂ２９Ｌ 22:00 Ｆターム(参考） 2D032 AB02 2D061 BA01 BA04 BC09 4F202 AA21 AC03 AD08 AH49 AJ03 CA17 CB01 CB12 CK41 CM72 CM82 4F208 AA21 AC03 AD08 AH49 AJ03 MA06 MB01 MC03 MC04 MG04 MH06 MK02 MK15 ──────────────────────────────────────────────────の Continued on the front page (51) Int.Cl. 7 Identification symbol FI Theme coat ゛ (Reference) E03C 1/18 E03C 1/18 // B29L 22:00 B29L 22:00 F-term (Reference) 2D032 AB02 2D061 BA01 BA04 BC09 4F202 AA21 AC03 AD08 AH49 AJ03 CA17 CB01 CB12 CK41 CM72 CM82 4F208 AA21 AC03 AD08 AH49 AJ03 MA06 MB01 MC03 MC04 MG04 MH06 MK02 MK15
Claims (6)
口部の周辺に折り返し縁付きフランジを有する箱状成形
体を成形する熱成形法であって、前記箱状成形体の表面
側の内部形状と寸法を精密に模すために必要な稜線のエ
ッジ部と底部のコーナー部および折り返し縁付きフラン
ジを賦形するための外枠を有し、上下に移動自在な可動
体に取り付けられた表面成形用フレーム状プラグと、前
記箱状成形体の裏面側の形状と寸法を精密に模すために
必要な稜線のエッジ部と開口部のコーナー部を有し、上
下に移動自在な可動体に取り付けられた裏面成形用フレ
ーム状プラグとを上下に配置し、ついでクランプ枠で周
辺部が固定され、かつ所定の温度に加熱されたプラスチ
ック板を前記表面成形用フレーム状プラグと裏面成形用
フレーム状プラグのあいだに配置し、つぎにそれぞれの
フレーム状プラグを相互にクランプ枠をこえて上下に押
し込んで箱状成形体を成形することを特徴とする熱成形
法。1. A thermoforming method for forming a box-shaped molded body having a flange with a folded edge around an opening from a heat-softened plastic plate, wherein the inner shape and dimensions of the front side of the box-shaped molded body are formed. A frame for surface shaping attached to a movable body that can move up and down, has an outer frame for shaping the edge part of the ridge line, the corner part of the bottom part, and the flange with the folded edge necessary to accurately imitate A back surface attached to a vertically movable movable body having a plug and a ridge edge and a corner of an opening necessary for precisely imitating the shape and dimensions of the back surface side of the box-shaped molded body. The molding frame-shaped plugs are arranged up and down, and then the peripheral part is fixed by a clamp frame, and the plastic plate heated to a predetermined temperature is separated from the surface molding frame-shaped plug and the back surface molding frame-shaped plug. A thermoforming method in which a box-shaped molded body is formed by arranging the frame-shaped plugs therebetween and then pushing the frame-shaped plugs up and down over the clamp frame with respect to each other.
側を密閉系とし、プラスチック板のスプリングバック力
に見合った空気圧で加圧することにより、前記箱状成形
体を成形することを特徴とする請求項１記載の熱成形
法。2. The box-shaped molded body is formed by pressurizing the inside of the surface-shaped frame-shaped plug with a closed system and applying air pressure corresponding to the springback force of the plastic plate. Item 6. The thermoforming method according to Item 1.
または一部が前記箱状成形体の形状を精密に模すために
必要な型状であることを特徴とする請求項１または２記
載の熱成形法。3. The surface-shaped frame-shaped plug according to claim 1, wherein all or a part of the surface-shaped frame-shaped plug has a shape necessary for accurately imitating the shape of the box-shaped body. Thermoforming method.
フィルム付きシートを使用し、かつ前記それぞれのフレ
ーム状プラグにグリースを塗布したのち、成形し、つい
でマスキングフィルムを剥離する請求項１、２または３
記載の熱成形法。4. A sheet with a masking film is used as the plastic plate, and after applying grease to the respective frame-like plugs, molding is performed, and then the masking film is peeled off.
The thermoforming method as described.
法により得られる箱状成形体。5. A box-shaped molded article obtained by the thermoforming method according to claim 1, 2, 3 or 4.
口部の周辺に折り返し縁付きフランジを有する箱状成形
体を成形する成形装置であって、前記箱状成形体の表面
側の内部形状と寸法を精密に模すために必要な稜線のエ
ッジ部と底部のコーナー部および折り返し縁付きフラン
ジを賦形するための外枠を有し、上下に移動自在な可動
体に取り付けられた表面成形用フレーム状プラグと、前
記箱状成形体の裏面側の形状と寸法を精密に模すために
必要な稜線のエッジ部と開口部のコーナー部を有し、上
下に移動自在な可動体に取り付けられた裏面成形用フレ
ーム状プラグと、前記表面成形用フレーム状プラグと裏
面成形用フレーム状プラグのあいだに所定の温度に加熱
されたプラスチック板を配置するクランプ枠とを備えて
なることを特徴とする成形装置。6. A molding apparatus for molding a box-shaped molded product having a flange with a folded edge around an opening from a heat-softened plastic plate, wherein the inner shape and dimensions of the front surface side of the box-shaped molded product are determined. A frame-shaped plug for surface shaping that has an outer frame for shaping the ridge edge, bottom corner, and folded-edge flange required to accurately imitate, and is attached to a movable body that can move up and down. And a backside molding attached to a vertically movable movable body having a ridge edge and a corner of an opening necessary for accurately imitating the shape and dimensions of the backside of the box-shaped molded body. And a clamp frame for disposing a plastic plate heated to a predetermined temperature between the front surface forming frame-shaped plug and the rear surface forming frame-shaped plug. Molding equipment.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2000276587A JP3914380B2 (en) | 2000-09-12 | 2000-09-12 | Thermoforming method, box-shaped molded body and molding apparatus |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2000276587A JP3914380B2 (en) | 2000-09-12 | 2000-09-12 | Thermoforming method, box-shaped molded body and molding apparatus |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JP2002086550A true JP2002086550A (en) | 2002-03-26 |
| JP3914380B2 JP3914380B2 (en) | 2007-05-16 |
Family
ID=18762022
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP2000276587A Expired - Fee Related JP3914380B2 (en) | 2000-09-12 | 2000-09-12 | Thermoforming method, box-shaped molded body and molding apparatus |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP3914380B2 (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103549899A (en) * | 2013-11-11 | 2014-02-05 | 佛山市浪鲸洁具有限公司 | Forming method for acrylic bathtub with skirt edge |
-
2000
- 2000-09-12 JP JP2000276587A patent/JP3914380B2/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103549899A (en) * | 2013-11-11 | 2014-02-05 | 佛山市浪鲸洁具有限公司 | Forming method for acrylic bathtub with skirt edge |
| CN103549899B (en) * | 2013-11-11 | 2015-10-07 | 佛山市浪鲸洁具有限公司 | A kind of acrylic bathtub forming method with shirt rim |
Also Published As
| Publication number | Publication date |
|---|---|
| JP3914380B2 (en) | 2007-05-16 |
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