JP4251115B2 - Foam molding method - Google Patents

Foam molding method Download PDF

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JP4251115B2
JP4251115B2 JP2004168765A JP2004168765A JP4251115B2 JP 4251115 B2 JP4251115 B2 JP 4251115B2 JP 2004168765 A JP2004168765 A JP 2004168765A JP 2004168765 A JP2004168765 A JP 2004168765A JP 4251115 B2 JP4251115 B2 JP 4251115B2
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panel
flange portion
foam
lower mold
foam molding
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JP2005343131A (en
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修一 内田
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Toyota Auto Body Co Ltd
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Toyota Auto Body Co Ltd
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Description

本発明は、パネルの一面に発泡成形層を形成する発泡成形方法に関し、特に、パネルの一端を折り曲げたフランジの一面に、パネルの一面に形成した発泡成形層に連続した発泡成形層を形成する発泡成形方法に関する。   The present invention relates to a foam molding method for forming a foam molding layer on one surface of a panel, and in particular, a foam molding layer continuous with a foam molding layer formed on one surface of a panel is formed on one surface of a flange where one end of the panel is bent. The present invention relates to a foam molding method.

自動車の冷凍車、保冷車等のボデー（以下、「保冷庫」という。）は、断熱材を挟んだ壁により、外界との熱の伝導を断つことにより庫内を一定の温度に保つようになっている。
そして、運転席とは独立した保冷庫を有する所謂バン型車は、壁を構成する外板と内板との間に断熱材を一体発泡したり、外板の内側に発泡した板状の断熱材を貼り付けた後、内板を取り付けたりして構成されている。
一方、所謂１ＢＯＸ車のボデーの運転席より後部を密閉して保冷庫に利用するようにした派生車両がある。
この１ＢＯＸ派生車の保冷庫は、外板は１ＢＯＸ車の外板をそのまま利用し、その内側に発泡した板状の断熱材を貼り付けた後、内板を取り付けたり、あるいは、外板と略平行に成形したパネル（内板）の一面に発泡成形層を形成したものを外板の内側に取り付けて構成している。 Body of automobile freezer car, cold car, etc. (hereinafter referred to as “cold box”) keeps the inside of the box at a constant temperature by cutting off the heat conduction with the outside by the wall sandwiching the heat insulating material. It has become.
A so-called van-type vehicle having a cold storage independent of the driver's seat has a plate-like heat insulation in which a heat insulating material is integrally foamed between the outer plate and the inner plate constituting the wall or foamed inside the outer plate. After the material is pasted, an inner plate is attached.
On the other hand, there is a derivative vehicle in which the rear portion is sealed from the driver's seat of a so-called 1BOX vehicle and used for a cold storage.
The cool box of this 1BOX derivative car uses the outer plate of the 1BOX car as it is, attaches a foamed plate-like heat insulating material to the inside, and then attaches the inner plate, or is abbreviated as the outer plate. A panel (inner plate) formed in parallel is formed by forming a foam molding layer on one side and attaching it to the inside of the outer plate.

そして、前者の、外板の内側に発泡材を板状にした断熱材を貼り付けた後、内板を取り付けた構造の保冷庫より、後者の、予めパネルの一面に発泡成形層を形成した内板（断熱パネル）を外板の内側に取り付けて構成した保冷庫の方が断熱性能が優れているが、断熱パネルの角部に発泡成形層を形成しにくいという問題がある。
すなわち、断熱パネルの角部は、図８に示すように、パネル９３０の一般面から折り曲げたフランジ部９３５で、他のパネル９８０と接続するようになっている。そして、従来、パネル９３０の一面に発泡成形層９６１を形成する発泡成形方法は、図９に示すように、下型９２０の全面を離型材９４０で覆い、該離型材９４０とは間隙ｓを設けてキャビティとなし、キャビティｓの全周が密閉するようにパネル９３０を載置して、上型９１０を型合わせし、キャビティｓ内に発泡材料を注入してパネル９３０の一面に発泡成形層９６１を形成して断熱パネルとするものである。 And after pasting the heat insulating material which made the foam material into the plate-like inside of the former outer plate, the foam molding layer was formed in one side of the panel beforehand from the cold storage of the structure where the inner plate was attached Although the cool box configured by attaching the inner plate (heat insulating panel) to the inner side of the outer plate has better heat insulating performance, there is a problem that it is difficult to form a foam molding layer at the corner of the heat insulating panel.
That is, as shown in FIG. 8, the corner portion of the heat insulation panel is connected to another panel 980 by a flange portion 935 bent from the general surface of the panel 930. Conventionally, in the foam molding method for forming the foam molding layer 961 on one surface of the panel 930, as shown in FIG. 9, the entire surface of the lower mold 920 is covered with a release material 940, and a gap s is provided between the release material 940 and the panel 930. The panel 930 is placed so that the entire circumference of the cavity s is hermetically sealed, the upper mold 910 is aligned, the foam material is injected into the cavity s, and a foam molding layer 961 is formed on one surface of the panel 930. To form a heat insulation panel.

キャビティｓの全周を密閉するために、パネル９３０の一般面の全周を下型９２０の段部９２７に載置するようにするため、このフランジ部９３５の外側９６９（図８に点線のハッチングで示す）には、発泡成形層９６１が形成されず、この部分の断熱性能が低下するという問題がある。
このフランジ部９３５を下型９２０に密閉して発泡成形層を形成する方法として、図１０に示すように、フランジ部９３５の先端からパネル９３０の一般面と略平行に、該一般面とは反対方向に延びる延在部９３７を設けて下型９２０と密着させてキャビティｓをフランジ部まで延長する方法がある。
しかしながら、このパネル９３０に延在部９３７を設ける方法では、この方法により成型した断熱パネルを組み立てて保冷庫とした場合、この延在部９３７から内板と外板の間の空間に熱が伝導するため、断熱性能が低下するという問題がある。 In order to seal the entire circumference of the cavity s, the entire circumference of the general surface of the panel 930 is placed on the step 927 of the lower mold 920. ) Has a problem that the foam-molded layer 961 is not formed, and the heat insulation performance of this portion is lowered.
As a method for sealing the flange portion 935 to the lower mold 920 to form a foamed molding layer, as shown in FIG. 10, the front surface of the flange portion 935 is substantially parallel to the general surface of the panel 930 and is opposite to the general surface. There is a method of extending the cavity s to the flange part by providing an extending part 937 extending in the direction and closely contacting the lower mold 920.
However, in the method of providing the extending portion 937 in the panel 930, when the heat insulating panel molded by this method is assembled into a cold storage, heat is conducted from the extending portion 937 to the space between the inner plate and the outer plate. There is a problem that the heat insulation performance is lowered.

また、上記のような延在部を設けて発泡成形する方法として、特開平１０−４４１６８号公報（以下、「特許文献１」という。）の図３に記載のものがあるが、この方法では、芯材４と表皮材３の間に注入された発泡材料が縁部付近で接合部から漏出してバリとなる問題があり、これを対策するものとして、特許文献１に記載された技術がある。
この特許文献１に記載の発泡成形方法は、表皮材（本発明の「離型材」に相当）のセットを容易にし、型設定時間を短縮して成形サイクルの短縮化を促進するとともに、不良率の低減のために（特許文献１の〔０００５〕参照）、型合わせ時、互いに接合する表皮材と芯材（本発明の「パネル」に相当）との接合部における表皮材先端の間隙部芯材面に触媒を塗布し、発泡材料発泡時、該発泡材料の化学反応を促進させ、硬化せしめる（特許文献１の〔請求項１〕参照）とともに、表皮材と芯材との接合部における芯材側接合面に溝形状の凹部を設け、注入された発泡材料の漏れを溜め、外部の表皮材を内外両面より挟持せしめる（特許文献１の〔請求項２〕参照）ものである。
特開平１０−４４１６８号公報 In addition, as a method of foam molding by providing the above-described extending portion, there is a method described in FIG. 3 of JP-A-10-44168 (hereinafter referred to as “Patent Document 1”). There is a problem that the foam material injected between the core material 4 and the skin material 3 leaks from the joint portion near the edge portion and becomes a burr, and the technique described in Patent Document 1 is used as a countermeasure. is there.
The foam molding method described in Patent Document 1 facilitates the setting of a skin material (corresponding to the “release material” of the present invention), shortens the mold setting time and promotes shortening of the molding cycle, and the defect rate. (Refer to [0005] of Patent Document 1), the gap core at the front end of the skin material at the joint between the skin material and the core material (corresponding to the “panel” of the present invention) that are joined to each other at the time of mold matching A catalyst is applied to the surface of the material, and at the time of foaming of the foam material, the chemical reaction of the foam material is promoted and cured (see claim 1 of Patent Document 1), and the core at the joint between the skin material and the core material A groove-shaped recess is provided on the material-side joining surface to collect leakage of the injected foamed material, and the external skin material is sandwiched from both the inner and outer surfaces (see [Claim 2] of Patent Document 1).
Japanese Patent Laid-Open No. 10-44168

ところが、上記特許文献１に記載の技術では、キャビティをフランジ部の側面まで連続させることはできるが、表皮材先端を芯材側（内側）に曲げて固定するため、固定が難しいという問題がある。上記特許文献１に記載の成形品のように、表皮材と芯材とが一体となって完成品となるものには適用できるが、離型材のように、発泡成形後、剥離するものには適用できない。
また、図８の点線のハッチングで示す部分に、この部分と同一形状で硬質スチレン等の断熱材からなる成形物を入れる方法もあるが、コストが高くなるという問題がある。 However, in the technique described in Patent Document 1, although the cavity can be continued to the side surface of the flange portion, the tip of the skin material is bent and fixed to the core material side (inside), so that there is a problem that fixing is difficult. . Although it can be applied to a product in which a skin material and a core material are integrated into a finished product, such as the molded product described in Patent Document 1, it can be applied to a product that peels off after foam molding, such as a mold release material. Not applicable.
In addition, there is a method in which a molded product made of a heat insulating material such as hard styrene having the same shape as this portion is put in the portion indicated by hatching in FIG. 8, but there is a problem that the cost is increased.

そこで、本発明は、かかる課題を解決すべく、パネルの一端を折り曲げたフランジ部の先端まで一体的に発泡成形層を形成できる発泡成形方法を提供することを目的とする。   Accordingly, an object of the present invention is to provide a foam molding method capable of integrally forming a foam molding layer up to the tip of a flange portion where one end of a panel is bent in order to solve such a problem.

本発明に係る請求項１に記載の発泡成形方法は、中央部に掘り込みを設けた下型の上部全面をその面に沿うように離型材で覆い、前記離型材を介して前記下型に前記掘り込みにより間隙が生じるようにパネルを載置し、上型と下型との型締め後、前記間隙内に発泡材料を注入することにより、前記パネルの一面に発泡成形層を形成する発泡成形方法において、前記パネルは少なくともその一端が上方に折り曲げられたフランジ部を有しており、前記下型には、前記パネルを載置したときに、前記フランジ部の一面側に前記掘り込みと連通する凹部が設けられており、前記パネルの前記フランジ部と交差する２辺の周縁が、前記離型材を介して前記下型に接するように前記パネルを載置し、前記離型材の前記凹部側の端部は、発泡材料が発泡して前記離型材が前記発泡材料により上型側に押圧されても、前記フランジ部から離れない程度の余裕を持って前記フランジ部の他面側に固定されていることを特徴とする。 In the foam molding method according to claim 1 of the present invention, the entire upper surface of the lower mold provided with a dug in the center is covered with a release material along the surface thereof, and the lower mold is formed through the release material. Foam forming a foam molding layer on one surface of the panel by placing the panel so that a gap is created by the digging, and clamping the upper mold and the lower mold and then injecting a foam material into the gap In the molding method, the panel has a flange portion at least one end of which is bent upward, and when the panel is placed on the lower mold, the digging is performed on one surface side of the flange portion. The recess is provided, and the panel is placed so that the peripheral edges of two sides intersecting the flange portion of the panel are in contact with the lower mold via the release material, and the recess of the release material The end of the side is foamed with foam material The be pressed against the upper mold side by the release material is said foam material, characterized that you have been fixed with a margin so as not away from the flange portion on the other side of the flange portion.

よって、下型の掘り込みと凹部により生じる間隙が連通しているため、パネルの一般面と連続してフランジ部の一面側に発泡成形層を一体で成形することができる。   Therefore, since the gap formed by the digging of the lower mold and the recess communicates with each other, the foam molding layer can be integrally formed on one surface side of the flange portion continuously with the general surface of the panel.

また、発泡材料がフランジ部と凹部との間に流入し発泡したときに、離型材が前記フランジ部から離れない程度の余裕を持ってフランジ部の他面側に固定されているので、発泡材料がその発泡による押圧力により離型材を上型に押し付け、また、フランジ部も上型に押し付けられるので発泡材料を漏出することなく、また、発泡材料が上型に直接接触して張り付くことなくフランジ部先端まで発泡成形層を一体に成形することができる。 Further, when the foamed material is flowed and foamed between the flange portion and the recess, the release material is fixed to the other surface side of the flange portion with a margin so as not away from the flange portion, foamed The material presses the release material against the upper mold by the pressing force of the foam, and the flange part is also pressed against the upper mold, so that the foam material does not leak out, and the foam material does not directly contact and stick to the upper mold The foam molding layer can be integrally formed up to the flange end.

本発明の発泡成形方法によれば、パネルを折り曲げたフランジ部の先端まで、パネルの一般面に成形する発泡成形層に連続した発泡成形層を一体で同時に、かつ、発泡材料を漏出させずにまた、上型に直接接触させずに成形することができる。   According to the foam molding method of the present invention, the foam molding layer continuous with the foam molding layer to be molded on the general surface of the panel is integrated at the same time up to the tip of the flange portion where the panel is bent, and without leaking the foam material. Moreover, it can shape | mold without making an upper mold | die contact directly.

次に、本発明に係る発泡成形方法の一の実施の形態について図面を参照して説明する。
ここで、図１は、本発明に係る発泡成形方法を実施するために、成形型を型締めした状態を示す断面図であり、図２から図５は、各工程を示す断面図である。 Next, an embodiment of a foam molding method according to the present invention will be described with reference to the drawings.
Here, FIG. 1 is a cross-sectional view showing a state in which a forming die is clamped in order to carry out the foam molding method according to the present invention, and FIGS. 2 to 5 are cross-sectional views showing respective steps.

本発明に係る発泡成形方法を実施するための成形型等の構成について説明する。成形型等は、図１、図４に示すように、上型１０と下型２０と、下型２０の上部全面をその面に沿うように覆う離型材４０と、該離型材４０を介して下型２０に載置されるパネル３０とからなる。
下型２０に載置されるパネル３０は、広い平面の一般面３１の少なくとも一端に上方に折り曲げられたフランジ部３５が形成されたものである。
したがって、上型１０の下面には、型締めしたときに、パネル３０の一般面３１を押圧する一般面当接面１１と、フランジ部３５に当接するフランジ部当接面１３と、下型２０の上面２５に当接する下型当接面１５とが形成されている。 The structure of a mold for carrying out the foam molding method according to the present invention will be described. As shown in FIGS. 1 and 4, the mold or the like includes an upper mold 10, a lower mold 20, a release material 40 that covers the entire upper surface of the lower mold 20 along the surface thereof, and the mold release material 40. The panel 30 is placed on the lower mold 20.
The panel 30 placed on the lower mold 20 has a flange portion 35 that is bent upward at at least one end of a general surface 31 having a wide plane.
Therefore, on the lower surface of the upper mold 10, the general surface contact surface 11 that presses the general surface 31 of the panel 30 when the mold is clamped, the flange contact surface 13 that contacts the flange portion 35, and the lower mold 20. A lower mold contact surface 15 that contacts the upper surface 25 is formed.

下型２０は、図４に示すように、前記パネル３０のフランジ部３５と交差する２辺の周縁３３が載置される一般面載置面２１１、２１１と、この一般面載置面２１１、２１１によって囲まれる掘り込み２１と、一般面載置面２１１、２１１から連続してパネル３０のフランジ部３５の二つの周縁が載置されるフランジ部載置面２３１、２３１と、このフランジ部載置面２３１、２３１によって囲まれ、前記掘り込み２１と連続する凹部２３と、この凹部２３の上端である上面２５とからなる。   As shown in FIG. 4, the lower mold 20 includes general surface mounting surfaces 211 and 211 on which two peripheral edges 33 intersecting the flange portion 35 of the panel 30 are mounted, and the general surface mounting surface 211, 211, the flange portion placement surfaces 231 and 231 on which the two peripheral edges of the flange portion 35 of the panel 30 are placed continuously from the general surface placement surfaces 211 and 211, and the flange portion placement. The recess 23 is surrounded by the placement surfaces 231 and 231 and is continuous with the digging 21, and the upper surface 25 is the upper end of the recess 23.

離型材４０は、板厚が０．３ｍｍ程度の比較的厚い透明なビニールシートで、平面状に下型２０を覆うことが可能な大きさに裁断されたものである。   The release material 40 is a relatively thick transparent vinyl sheet having a plate thickness of about 0.3 mm, and is cut into a size that can cover the lower mold 20 in a planar shape.

以上のように構成された成形型等を用いてパネル３０の一面に発泡成形層を形成する手順を説明する。
まず、下型２０の、前記掘り込み２１、凹部２３、一般面載置面２１１、フランジ部載置面２３１および上面２５等からなる上部全面を、図２および図４に示すように、該下型２０の凹凸の面に沿うように、そして、その端部が下型２０よりはみ出るように離型材４０で覆う。
離型材４０で覆われた下型２０の一般面載置面２１１、フランジ部載置面２３１上に、パネル３０のフランジ部３５と交差する２辺の周縁３３を、パネル３０の下面３１３と、フランジ部３５の一面側３５３とが下側になるように前記離型材４０を挟んでパネル３０を載置する。このとき、一般面載置面２１１、２１１の間隔が大きくてパネル３０の一般面３１が垂れ下がるような場合には、前記下型２０の掘り込み２１とパネル３０の下面３１３との間に発泡スチロール製等の複数の支持部材７０をあてがっておくのがよい。 A procedure for forming a foam molding layer on one surface of the panel 30 using the molding die configured as described above will be described.
First, as shown in FIG. 2 and FIG. 4, the lower entire surface of the lower mold 20 including the digging 21, the recess 23, the general surface mounting surface 211, the flange portion mounting surface 231 and the upper surface 25 is The mold 20 is covered with a release material 40 so as to follow the uneven surface of the mold 20 and so that its end protrudes from the lower mold 20.
On the general surface mounting surface 211 and the flange portion mounting surface 231 of the lower mold 20 covered with the release material 40, the two peripheral edges 33 intersecting the flange portion 35 of the panel 30, the lower surface 313 of the panel 30, The panel 30 is placed with the release material 40 sandwiched so that the one surface side 353 of the flange portion 35 is on the lower side. At this time, when the interval between the general surface mounting surfaces 211 and 211 is large and the general surface 31 of the panel 30 hangs down, it is made of foamed polystyrene between the digging 21 of the lower mold 20 and the lower surface 313 of the panel 30. It is preferable to attach a plurality of support members 70 such as the above.

上記のようにパネル３０を下型２０上に載置したときに、フランジ部３５と下型２０の凹部２３との間には掘り込み２１から連続する間隙Ｓが生じているので、図３に示すように、発泡材料６０が発泡して離型材４０が発泡材料６０により上型１０側に押圧されても、前記フランジ部３５から離れない程度に余裕部４３を持って、下型２０の上面２５を覆っている離型材４０の先端部をフランジ部３５の他面側３５１に接着テープ５０等で固定しておく。   When the panel 30 is placed on the lower mold 20 as described above, a gap S continuous from the digging 21 is generated between the flange portion 35 and the recess 23 of the lower mold 20. As shown, even when the foam material 60 is foamed and the release material 40 is pressed against the upper mold 10 by the foam material 60, the upper surface of the lower mold 20 has a margin 43 so as not to be separated from the flange portion 35. 25 is fixed to the other surface side 351 of the flange portion 35 with an adhesive tape 50 or the like.

上記のように下型２０側の準備ができたならば、図５に示すように、上型１０を徐々に下降させて、上型１０の一般当接面１１がパネル３０の上面３１１に、フランジ部当接面１３がフランジ部３５の他面側３５１に貼り付けた離型材４０の先端部およびこれを固定している接着テープ５０等に、そして、下型当接面１５が下型２０の上面２５にそれぞれ当接するように型締めを行う。なお、このとき、離型材４０の余裕部４３は弛みをもったままである。   When the lower mold 20 side is ready as described above, the upper mold 10 is gradually lowered so that the general abutment surface 11 of the upper mold 10 is placed on the upper surface 311 of the panel 30 as shown in FIG. The flange portion contact surface 13 is attached to the tip of the release material 40 attached to the other surface 351 of the flange portion 35, the adhesive tape 50 fixing the same, and the lower mold contact surface 15 is the lower mold 20. The molds are clamped so as to come into contact with the upper surface 25 respectively. At this time, the margin 43 of the release material 40 remains slack.

つぎに、型締めされた状態の掘り込み２１と凹部２３との連続した間隙Ｓに、図略の押出機から溶融された発泡性樹脂からなる発泡材料６０を射出する。すると、発泡材料６０は、図１に示すように、間隙Ｓに充満し、離型材４０の弛んでいた余裕部４３を上方に押圧して、下型２０の凹部２３とパネル３０のフランジ部３５とで囲まれる間隙Ｓの上端で離型材４０の余裕部４３を上型１０の下型当接面１５に押し付ける。
したがって、凹部２３とフランジ部３５とで囲まれる間隙Ｓの上端が離型材４０で覆われるため、発泡材料６０が外部に漏れ出すことなく、また、発泡材料６０が直接上型１０に接触することなく成形できる。また、発泡材料６０は前記間隙Ｓを囲むその他の全ての面も、その発泡力によって離型材４０を外側に向かって押圧して、間隙Ｓ内に充満する。 Next, a foam material 60 made of a foamable resin melted from an unillustrated extruder is injected into a continuous gap S between the dug 21 and the recess 23 in a clamped state. Then, as shown in FIG. 1, the foam material 60 fills the gap S, presses the slack margin 43 of the release material 40 upward, and the concave portion 23 of the lower mold 20 and the flange portion 35 of the panel 30. The margin part 43 of the release material 40 is pressed against the lower mold contact surface 15 of the upper mold 10 at the upper end of the gap S surrounded by.
Therefore, since the upper end of the gap S surrounded by the recess 23 and the flange portion 35 is covered with the release material 40, the foam material 60 does not leak to the outside, and the foam material 60 directly contacts the upper mold 10. Can be molded without any problems. In addition, the foam material 60 also fills the gap S by pressing the release material 40 outward by the foaming force on all other surfaces surrounding the gap S.

その後、上型１０、下型２０を冷却して、上型１０を上昇させて型開きをし、パネル３０と、該パネル３０の下面３１３に接着され発泡材料６０が硬化して形成された発泡成形層６１と、該発泡成形層６１に接着された離型材４０とが一体となったものを下型２０から取り外す。
そして、離型材４０を発泡成形層６１から引き剥がすことにより、図６に示すように、パネル３０の下面およびフランジ部３５の一面側３５３に発泡形成層６１が形成された断熱パネルが得られる。 Thereafter, the upper mold 10 and the lower mold 20 are cooled, the upper mold 10 is raised and the mold is opened, and the foam formed by the panel 30 and the lower surface 313 of the panel 30 being bonded and the foam material 60 is cured. A structure in which the molding layer 61 and the release material 40 bonded to the foam molding layer 61 are integrated is removed from the lower mold 20.
Then, by separating the release material 40 from the foam molding layer 61, a heat insulating panel in which the foam forming layer 61 is formed on the lower surface of the panel 30 and the one surface 353 of the flange portion 35 is obtained as shown in FIG.

上記のようにして得られた断熱パネル３を、図７に示すように、保冷庫の天井壁として用い、側壁８０の上端と前記フランジ部３５とをリベット等により接続すると、断熱パネル３の角部に発泡成形層６１が形成された保冷庫が完成する。   As shown in FIG. 7, when the heat insulation panel 3 obtained as described above is used as a ceiling wall of a cool box, and the upper end of the side wall 80 and the flange portion 35 are connected by a rivet or the like, the corner of the heat insulation panel 3 is obtained. The cold storage in which the foamed molding layer 61 is formed at the part is completed.

なお、本発明は前記実施の形態のものに限定されるものではなく、その趣旨を逸脱しない範囲で様々な変更が可能である。
例えば、前記実施の形態では、フランジ部を１または２辺に設けたもので説明したが、これに限られず、４辺に設けたパネルでも実施が可能である。 In addition, this invention is not limited to the thing of the said embodiment, A various change is possible in the range which does not deviate from the meaning.
For example, in the above embodiment, the flange portion is provided on one or two sides. However, the present invention is not limited to this, and a panel provided on four sides can also be implemented.

本発明は、パネルの一面に発泡成形層を形成する発泡成形方法において、パネルは少なくともその一端が上方に折り曲げられたフランジ部を有しており、下型には、パネルを載置したときに、フランジ部の一面側に掘り込みと連通する凹部が設けられており、パネルのフランジ部と交差する２辺の周縁が、離型材を介して下型に接するようにパネルを載置して発泡成形するようにしたので、パネルの一般面と連続してフランジ部の一面側に発泡成形層を一体的に形成した断熱パネルを、安価に製造することが可能となった。   The present invention relates to a foam molding method in which a foam molding layer is formed on one surface of a panel. The panel has a flange portion that is bent upward at least at one end thereof. A recess is provided on one surface side of the flange portion to communicate with the digging, and the panel is placed and foamed so that the peripheral edges of the two sides intersecting the flange portion of the panel are in contact with the lower mold through the release material. Since it was formed, a heat insulating panel in which a foam molding layer was integrally formed on one surface side of the flange portion continuously with the general surface of the panel could be manufactured at low cost.

本発明の一の実施の形態に係る発泡成形方法を実施するために、成形型を型締めし、発泡材料が発泡した状態の断面図である。BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a cross-sectional view of a state where a mold is clamped and a foam material is foamed in order to implement a foam molding method according to an embodiment of the present invention. 本発明の一の実施の形態に係る発泡成形方法を実施するために、下型を離型材で覆った状態の断面図である。It is sectional drawing of the state which covered the lower mold | type with the mold release material in order to implement the foam molding method which concerns on one embodiment of this invention. 本発明の一の実施の形態に係る発泡成形方法を実施するために、離型材で覆った下型にパネルを載置し、離型材の先端をフランジ部の他面側に固定した状態の断面図である。In order to carry out the foam molding method according to one embodiment of the present invention, a panel is placed on a lower mold covered with a release material, and the tip of the release material is fixed to the other surface side of the flange portion FIG. 本発明の一の実施の形態に係る発泡成形方法を実施するために、離型材で覆い、パネルを載置した下型の斜視図である。It is a perspective view of the lower mold | type which covered with the mold release material and mounted the panel in order to implement the foam molding method which concerns on one embodiment of this invention. 本発明の一の実施の形態に係る発泡成形方法を実施するために、離型材で覆い、パネルを載置した下型を上型で押圧し、発泡材料を注入する前の状態の断面図である。In order to carry out the foam molding method according to one embodiment of the present invention, a sectional view of the state before covering with a release material, pressing the lower mold on which the panel is placed with the upper mold, and injecting the foam material is there. 本発明の一の実施の形態に係る発泡成形方法を実施した後、離型したパネルの断面図である。It is sectional drawing of the panel released after implementing the foam molding method which concerns on one embodiment of this invention. 本発明の一の実施の形態に係る発泡成形方法により成形したパネルを保冷庫に組み付けた部分断面図である。It is a fragmentary sectional view which assembled | attached the panel shape | molded by the foam molding method which concerns on one embodiment of this invention to the cool box. 従来の保冷庫の部分断面図である。It is a fragmentary sectional view of the conventional cool box. 従来の発泡成形方法を実施するための成形型の断面図である。It is sectional drawing of the shaping | molding die for enforcing the conventional foam molding method. 従来の発泡成形方法を改良した発泡成形方法を実施するための成形型の断面図である。It is sectional drawing of the shaping | molding die for implementing the foam molding method which improved the conventional foam molding method.

符号の説明Explanation of symbols

１０ 上型
１５ 下型当接面
２０ 下型
２１ 掘り込み
２３ 凹部
２５ 上面
３０ パネル
３１ 一般面
３３ 周縁
３５ フランジ部
４０ 離型材
４１ 端部
４３ 余裕部
５０ 接着テープ
６０ 発泡材料
６１ 発泡成形層
Ｓ 間隙 10 upper mold 15 lower mold contact surface 20 lower mold 21 digging 23 recess 25 upper surface 30 panel 31 general surface 33 peripheral edge 35 flange part 40 release material 41 end part 43 margin part 50 adhesive tape 60 foam material 61 foam molding layer S gap

Claims (1)

中央部に掘り込みを設けた下型の上部全面をその面に沿うように離型材で覆い、前記離型材を介して前記下型に前記掘り込みにより間隙が生じるようにパネルを載置し、上型と下型との型締め後、前記間隙内に発泡材料を注入することにより、前記パネルの一面に発泡成形層を形成する発泡成形方法において、
前記パネルは少なくともその一端が上方に折り曲げられたフランジ部を有しており、
前記下型には、前記パネルを載置したときに、前記フランジ部の一面側に前記掘り込みと連通する凹部が設けられており、
前記パネルの前記フランジ部と交差する２辺の周縁が、前記離型材を介して前記下型に接するように前記パネルを載置し、
前記離型材の前記凹部側の端部は、発泡材料が発泡して前記離型材が前記発泡材料により上型側に押圧されても、前記フランジ部から離れない程度の余裕を持って前記フランジ部の他面側に固定されていることを特徴とする発泡成形方法。 Cover the entire upper surface of the lower mold with a digging in the center with a release material along the surface, and place the panel so that a gap is generated by the digging in the lower mold through the mold release material, In the foam molding method of forming a foam molding layer on one surface of the panel by injecting a foam material into the gap after clamping the upper mold and the lower mold,
The panel has a flange portion at least one end of which is bent upward,
When the panel is placed on the lower mold, a concave portion communicating with the digging is provided on one surface side of the flange portion,
The panel is placed so that the peripheral edges of two sides intersecting the flange portion of the panel are in contact with the lower mold via the release material ,
The end of the release material on the recess side has a margin enough to prevent the release material from separating from the flange portion even if the foam material is foamed and the release material is pressed to the upper mold side by the foam material. foam molding wherein that you have been fixed on the other side.
JP2004168765A 2004-06-07 2004-06-07 Foam molding method Expired - Lifetime JP4251115B2 (en)

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