WO1994001274A1 - Method of molding interior finishing material of cardboard - Google Patents

Method of molding interior finishing material of cardboard Download PDF

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Publication number
WO1994001274A1
WO1994001274A1 PCT/JP1993/000951 JP9300951W WO9401274A1 WO 1994001274 A1 WO1994001274 A1 WO 1994001274A1 JP 9300951 W JP9300951 W JP 9300951W WO 9401274 A1 WO9401274 A1 WO 9401274A1
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WO
WIPO (PCT)
Prior art keywords
substrate
corrugated cardboard
cardboard
molding
cardboard substrate
Prior art date
Application number
PCT/JP1993/000951
Other languages
French (fr)
Japanese (ja)
Inventor
Mitsutoshi Ogata
Kunio Cho
Yutaka Sato
Original Assignee
Tri-Wall K.K.
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Tri-Wall K.K. filed Critical Tri-Wall K.K.
Priority to GB9320497A priority Critical patent/GB2273906B/en
Publication of WO1994001274A1 publication Critical patent/WO1994001274A1/en

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B29/00—Layered products comprising a layer of paper or cardboard
    • B32B29/08—Corrugated paper or cardboard
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C51/00—Shaping by thermoforming, i.e. shaping sheets or sheet like preforms after heating, e.g. shaping sheets in matched moulds or by deep-drawing; Apparatus therefor
    • B29C51/14—Shaping by thermoforming, i.e. shaping sheets or sheet like preforms after heating, e.g. shaping sheets in matched moulds or by deep-drawing; Apparatus therefor using multilayered preforms or sheets
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B31—MAKING ARTICLES OF PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER; WORKING PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER
    • B31F—MECHANICAL WORKING OR DEFORMATION OF PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER
    • B31F1/00—Mechanical deformation without removing material, e.g. in combination with laminating
    • B31F1/0077—Shaping by methods analogous to moulding, e.g. deep drawing techniques
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B31—MAKING ARTICLES OF PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER; WORKING PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER
    • B31F—MECHANICAL WORKING OR DEFORMATION OF PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER
    • B31F1/00—Mechanical deformation without removing material, e.g. in combination with laminating
    • B31F1/20—Corrugating; Corrugating combined with laminating to other layers
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B1/00—Layered products having a non-planar shape
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B27/00—Layered products comprising a layer of synthetic resin
    • B32B27/06—Layered products comprising a layer of synthetic resin as the main or only constituent of a layer, which is next to another layer of the same or of a different material
    • B32B27/10—Layered products comprising a layer of synthetic resin as the main or only constituent of a layer, which is next to another layer of the same or of a different material of paper or cardboard
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B29/00—Layered products comprising a layer of paper or cardboard
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C51/00—Shaping by thermoforming, i.e. shaping sheets or sheet like preforms after heating, e.g. shaping sheets in matched moulds or by deep-drawing; Apparatus therefor
    • B29C51/08—Deep drawing or matched-mould forming, i.e. using mechanical means only
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29K—INDEXING SCHEME ASSOCIATED WITH SUBCLASSES B29B, B29C OR B29D, RELATING TO MOULDING MATERIALS OR TO MATERIALS FOR MOULDS, REINFORCEMENTS, FILLERS OR PREFORMED PARTS, e.g. INSERTS
    • B29K2711/00—Use of natural products or their composites, not provided for in groups B29K2601/00 - B29K2709/00, for preformed parts, e.g. for inserts
    • B29K2711/12—Paper, e.g. cardboard
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B2605/00—Vehicles
    • B32B2605/003—Interior finishings

Definitions

  • the present invention relates to a method for molding a corrugated cardboard interior material comprising a corrugated cardboard substrate formed into a predetermined shape and a decorative skin material bonded to one surface of the corrugated cardboard substrate.
  • Corrugated cardboard interior materials are used, for example, as ceiling interior materials for automobiles. Conventionally, as a method for forming such corrugated cardboard interior materials, the method disclosed in Japanese Patent Publication No. 57-21003 has been known. I have.
  • the method of forming a corrugated cardboard interior material disclosed in the above-mentioned publication is a method of forming a flat corrugated cardboard substrate in which a liner is bonded to both sides of a corrugated core via a thermoplastic resin film as shown in FIG. Then, using the same mold, a decorative skin material, usually made of a resin sheet, is laminated on the above-formed corrugated cardboard substrate via a heat-soluble adhesive such as a hot melt sheet, and then heated again. The pressure is applied to melt the adhesive so that the skin material and the corrugated cardboard substrate are bonded to each other.
  • the skin material is adhered to the corrugated cardboard substrate after molding by directly using the mold for hot press formed by heating and pressurizing the corrugated cardboard substrate. Until the bonding between the skin material and the corrugated cardboard substrate is completed, the corrugated cardboard substrate is kept in a heated state, and the resin film for bonding the liner and the core is in a molten state. Since it does not completely solidify immediately afterwards, there is a problem that spring backing occurs and often causes deformation of the molded product. .
  • the molding step of the corrugated cardboard substrate and the bonding step of the decorative skin material are performed using the same mold.
  • SUMMARY OF THE INVENTION The present invention has been made in view of the above-mentioned problems of the prior art, and aims at improving quality by preventing deformation due to springback after molding, and improving productivity and manufacturing. It is an object of the present invention to provide a method for forming a corrugated cardboard interior material that can also reduce the manufacturing cost. Disclosure of the invention
  • a flat corrugated cardboard substrate having a liner bonded to both sides of a corrugated core via a thermoplastic resin film is firstly subjected to a hot press device.
  • the temperature is high enough to leave enough heat to melt the heat-soluble adhesive on the corrugated board surface after the molding is completed and the mold is released, but at a temperature such that the paper constituting the corrugated board is not scorched during molding.
  • press and mold are then treated from the mold of the hot press machine and immediately transferred to the mold of the cold press machine, and the decorative skin material is overlaid on the surface thereof via a heat-soluble adhesive.
  • a cold press is performed before the temperature of the corrugated cardboard substrate surface decreases, and the adhesive is melted by using the residual heat of the corrugated cardboard substrate to bond the corrugated cardboard substrate and the skin material.
  • thermoplastic resin interposed between the core of the corrugated base material and the liner and melted during the molding process of the corrugated base material becomes cold during the bonding process of the skin material. It cools and solidifies while it is in the molding die of the press device, and at the time of demolding, it completely solidifies and the potential for springback disappears.
  • the product can surely maintain the formed shape, and the quality is improved, so the commercial value can be increased.
  • the hot press device used in the corrugated board forming process is ready for use in the next forming when the skin material bonding process is performed, while the cold press device that performs the skin material bonding process is a corrugated cardboard base. Since the material forming process is ready for the next use when it is performed, the machine can be used efficiently by alternately operating it.
  • the corrugated base material for the molding cycle was charged during the pressurization time of the cold press process, and the mold cardboard substrate and the skin material for the next molding cycle were charged during the hot pressing process. Since each operation can be performed during the pressurization time, the work efficiency can be improved by eliminating the waiting time of the operator.
  • FIG. 1 is a sectional view of a flat corrugated cardboard substrate used in the present invention.
  • FIG. 2 is an explanatory view showing a hot press molding step of a cardboard substrate.
  • FIG. 3 is an explanatory view showing a step of transferring a molded cardboard substrate to a cold press device.
  • FIG. 4 is an explanatory diagram showing a process of bonding a molded corrugated ball base material and a decorative skin material by cold pressing.
  • FIG. 5 is an explanatory diagram showing a product release process.
  • Fig. 6 is a cross-sectional view of a product corrugated cardboard interior material.
  • A is a corrugated cardboard substrate used in the method of the present invention.
  • the corrugated cardboard substrate A is a corrugated core 1, and a thermoplastic resin film 2 such as a polyethylene film on both sides of the core, respectively.
  • the liner 4 is bonded to the core 1 via a liner 3, and one of the liners 4 is completely bonded to the core 1, while the other liner 5 is pressed during press forming. Only five sides are temporarily fixed so as to allow relative sliding between the core 5 and the core 1.
  • This corrugated cardboard substrate usually has a flat plate shape.
  • the flat plate-shaped corrugated cardboard substrate A is heated and pressed by a hot press device B to form a predetermined shape.
  • the hot press device B has a conventionally known structure and form including a fixed lower die B1 composed of a female die and a movable upper die B2 composed of a male die.
  • the molding surface portion 2 is heated to a required molding temperature by a suitable heating means.
  • the corrugated cardboard substrate A is placed on the fixed lower die B1 of the hot press device B with the liner 5 temporarily fixed to the core 1 facing upward, and the movable upper die B2 is lowered to form both die B Press and heat between 1 and B 2 to form.
  • the heating temperature is preferably about 220 ° C.
  • thermoplastic resin films 2 and 3 such as a polyethylene film interposed between the core 1 and the liners 4 and 5.
  • the temperature is set at about 130 ° C, which is sufficient to melt the resin films 2 and 3.However, as described above, by molding at a heating temperature significantly higher than that, the melting of the films 2 and 3 becomes faster, and the pressing time is reduced. It can be shortened.
  • the movable upper die B2 is raised, and the molded cardboard base material A 'is released from the fixed lower die B1.
  • the resin films 2 and 3 interposed between the core 1 and the liners 1 and 4 are in a molten state and have not yet been solidified. Forces are in a possible state.
  • the corrugated cardboard substrate A ′ which has been removed from the mold after the above-mentioned molding, is immediately transferred to a cold press machine, and a decorative skin material 7 is overlaid on the surface thereof with a heat-soluble adhesive 6 and pressed.
  • a hot press device B after removing the molded corrugated cardboard substrate A' The cardboard substrate A for the next molding cycle is charged.
  • the decorative skin material 7 is usually made of a resin sheet when the cardboard interior material D to be manufactured is, for example, a ceiling interior material of an automobile, and the heat-soluble adhesive 6 is made of, for example, a polyolefin-based or polyamide-based hot melt film.
  • This hot melt film may be preliminarily laminated on the back surface of the skin material 7 as shown in the illustrated example, or may be formed into a film sheet and transferred to a cold press machine C. It may be placed on the cardboard substrate A '.
  • the cold press C is the same as the hot press B, and the female fixed lower die It differs from a hot press device in that it does not have a heating device, which consists of C1 and a male movable upper die C2.It must have a cooling device to cool the molding surface if necessary. There is also.
  • the clearance is formed larger than that of the upper and lower molds B 1 and B 2 of the hot press machine B by an amount corresponding to the thickness of the decorative skin material 7. Except for the above, it is formed in exactly the same shape as the molded portions of the upper and lower dies B1, B2 of the hot press device B.
  • a residual heat of about 130 ° C sufficient to melt the hot melt film 6 still remains on the corrugated cardboard substrate A, which has been removed from the hot press apparatus B and introduced into the cold press apparatus C.
  • the hot-melt film 6 is melted by the residual heat of the molded cardboard substrate A, and adheres the cardboard substrate A 'and the decorative skin material 7 by pressing.
  • the molds C1 and C2 are opened and demolded to obtain the interior material D made of corrugated cardboard, which is a product.
  • the temperature of the thermoplastic resin 2, 3 between the core 1 of the base material A, 1 and the liners 4, 5 decreases.
  • thermoplastic resins 2 and 3 proceeds, and the shape of the product D is reliably maintained.
  • the removal of the cold press device C and the charging of the molded cardboard substrate A 'and the skin material 7 for the next molding cycle can be performed during the heating and pressurizing time in the hot pressing process.
  • the method for forming an interior material made of corrugated cardboard according to the present invention is useful as a method for manufacturing interior materials for automobiles, ships, houses, etc. using a corrugated cardboard substrate. Suitable for wood production.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Laminated Bodies (AREA)
  • Making Paper Articles (AREA)
  • Vehicle Interior And Exterior Ornaments, Soundproofing, And Insulation (AREA)

Abstract

A method of molding an interior finishing material of cardboard which consists of a substrate of cardboard molded to a predetermined shape, and a decorative outer surface material pasted on one surface of the substrate, and which is used as an interior finishing material for the ceiling of an automobile. A flat cardboard substrate obtained by pasting liners on both sides of a corrugated core via films of a thermoplastic resin is first thermally pressure-molded by a hot press at such a high temperature that permits heat, the temperature of which is high enough to melt a heat-fusable bonding agent, to remain on the surface of the cardboard substrate after the cardboard substrate has finished being molded and taken out of the hot press, and that does not cause the cardboard constituting the substrate to be burnt during the molding thereof. This molded cardboard substrate is then taken out of the hot press and transferred to a mold in a cold press, and a decorative surface material is superposed thereon via a heat-fusable bonding agent, the substrate and surface material being brought into close contact with each other by the cold press. The bonding agent is melted by utilizing the remaining heat of the cardboard substrate to bond the substrate and surface material to each other. During this decorative surface material bonding step, the thermoplastic resin between the core of the cardboard substrate and liners is solidified to fix the shape thereof so that springing back does not occur.

Description

明細書 段ボール製内装材の成形方法 技術分野  Description Method for forming corrugated cardboard interior materials
本発明は所定形状に成形された段ボール基材と、該段ボール基材の一面に貼合 された化粧表皮材とからなる段ボール製内装材の成形方法に関する。 背景技術  The present invention relates to a method for molding a corrugated cardboard interior material comprising a corrugated cardboard substrate formed into a predetermined shape and a decorative skin material bonded to one surface of the corrugated cardboard substrate. Background art
段ボール製内装材は例えば自動車の天井内装材等に用いられているが、 従来、 このような段ボール製内装材の成形方法として日本特公昭 5 7 - 2 1 0 3号公報 の方法が知られている。  Corrugated cardboard interior materials are used, for example, as ceiling interior materials for automobiles. Conventionally, as a method for forming such corrugated cardboard interior materials, the method disclosed in Japanese Patent Publication No. 57-21003 has been known. I have.
上記公報に示される段ボール製内装材の成形方法は、 図 1に示すような波形中 芯の両側に熱可塑性樹脂フィルムを介してライナ一を貼合した平板状段ボール基 材を所定の熱プレス装置によって加熱、加圧成形し、 引き続き同一の型を用いて 上記成形された段ボール基材に通常樹脂シートからなる化粧表皮材をホットメル トシ一ト等の熱可溶性接着剤を介して重ね， 再び加熱、加圧して接着剤を溶融さ せ、表皮材と段ボール基材とを接着するようにするものである。  The method of forming a corrugated cardboard interior material disclosed in the above-mentioned publication is a method of forming a flat corrugated cardboard substrate in which a liner is bonded to both sides of a corrugated core via a thermoplastic resin film as shown in FIG. Then, using the same mold, a decorative skin material, usually made of a resin sheet, is laminated on the above-formed corrugated cardboard substrate via a heat-soluble adhesive such as a hot melt sheet, and then heated again. The pressure is applied to melt the adhesive so that the skin material and the corrugated cardboard substrate are bonded to each other.
以上のように従来の方法は、 段ボール基材を加熱、加圧して成形した熱プレス 用の成形型をそのまま使って、 成形後の段ボール基材への表皮材の接着を行なつ ているので、表皮材と段ボール基材との接着が終了するまで段ボール基材は加熱 された状態に保持されてライナ一と中芯を接着する樹脂フィルムも溶融状態にあ り、接着力終了して脱型した後も直ぐには完全に固化しないため、 スプリングバ ックカ生じ、 しばしば成形品の変形を引き起こすという問題があった。 。  As described above, in the conventional method, the skin material is adhered to the corrugated cardboard substrate after molding by directly using the mold for hot press formed by heating and pressurizing the corrugated cardboard substrate. Until the bonding between the skin material and the corrugated cardboard substrate is completed, the corrugated cardboard substrate is kept in a heated state, and the resin film for bonding the liner and the core is in a molten state. Since it does not completely solidify immediately afterwards, there is a problem that spring backing occurs and often causes deformation of the molded product. .
また、 上記従来の方法では、 段ボール基材の成形工程と、 化粧表皮材の接着工 程を同一の型を用いて行なうため、 表皮材の接着が完了して成形型が空くまで、 次の成形サイクルに移ることがでず、生産性が悪いという欠点もあった。。 本発明は、 従来技術が有する上記問題点に鑑みてなされたもので、 成形後のス プリングバックによる変形を防止して品質の向上を図り、且つ生産性の向上と製 造コストの低減をも実現することができる段ボール製内装材の成形方法を提供す ることを目的としている。 発明の開示 Also, in the above-mentioned conventional method, the molding step of the corrugated cardboard substrate and the bonding step of the decorative skin material are performed using the same mold. There was also a drawback that it was not possible to shift to a cycle and productivity was poor. . SUMMARY OF THE INVENTION The present invention has been made in view of the above-mentioned problems of the prior art, and aims at improving quality by preventing deformation due to springback after molding, and improving productivity and manufacturing. It is an object of the present invention to provide a method for forming a corrugated cardboard interior material that can also reduce the manufacturing cost. Disclosure of the invention
上記目的を達成するために本発明の段ボール製内装材の成形方法では、 波形中 芯の両側に熱可塑性樹脂フィルムを介してライナ一を貼合した平板状段ボール基 材を、 先ずホッ トプレス装置によって、 成形が終了して脱型した後に段ボール基 材表面に熱可溶性接着剤を溶融させるに足る余熱が残り得る程度に高温で、 しか も成形時に段ボール基材を構成する紙が焦げない程度の温度で加熱、 加圧成形す る。 続いてこの成形された段ボール基材をホッ トプレス装置の成形型から脱型し て直ちにコールドプレス装置の成形型に移し、 その表面に熱可溶性接着剤を介し て化粧表皮材を重ねる。 そして段ボール基材表面の温度が低下しないうちにコー ルドプレスし、 上記段ボール基材の余熱を利用して接着剤を溶融し、 段ボール基 材と表皮材とを接着する。  In order to achieve the above object, in the method for molding a corrugated cardboard interior material of the present invention, a flat corrugated cardboard substrate having a liner bonded to both sides of a corrugated core via a thermoplastic resin film is firstly subjected to a hot press device. However, the temperature is high enough to leave enough heat to melt the heat-soluble adhesive on the corrugated board surface after the molding is completed and the mold is released, but at a temperature such that the paper constituting the corrugated board is not scorched during molding. And press and mold. Subsequently, the formed corrugated cardboard substrate is released from the mold of the hot press machine and immediately transferred to the mold of the cold press machine, and the decorative skin material is overlaid on the surface thereof via a heat-soluble adhesive. Then, a cold press is performed before the temperature of the corrugated cardboard substrate surface decreases, and the adhesive is melted by using the residual heat of the corrugated cardboard substrate to bond the corrugated cardboard substrate and the skin material.
このことにより、 段ボーノレ基材の中芯とラィナ一の間に介在されていて段ボー ル基材の成形工程で溶融した熱可塑性樹脂が、 表皮材の接着工程の過程において 段ボール基材がコールドプレス装置の成形型内にある間に冷却固化することにな り、 脱型時には完全に固化力《進んでスプリングバックの恐れがなくなる。  As a result, the thermoplastic resin interposed between the core of the corrugated base material and the liner and melted during the molding process of the corrugated base material becomes cold during the bonding process of the skin material. It cools and solidifies while it is in the molding die of the press device, and at the time of demolding, it completely solidifies and the potential for springback disappears.
従って製品は成形された形状を確実に保持することができ、 品質が向上するの で商品価値を高めることができる。  Therefore, the product can surely maintain the formed shape, and the quality is improved, so the commercial value can be increased.
また、 段ボール基材の成形工程で使用するホッ トプレス装置は、 表皮材の接着 工程が行われるときには次の成形に使用できる状態になり、 一方表皮材の接着工 程を行うコールドプレス装置は段ボール基材の成形工程力《行われるときには次の 使用に供せられる状態になるので、 これを交互に動作させることにより装置を効 率よく使用することができ、 しかもホットプレス装置の脱型と次の成形サイクル 用の段ボーノレ基材の投入はコールドプレス工程の加圧時間中に、 コールドプレス 装置の脱型及び次の成形サイクル用の成形段ボール基材と表皮材の投入はホット プレス工程における加熱、 加圧時間中に夫々行うことができるので、 作業者の待 ち時間を無くして作業の効率を上げることができる。 図面の簡単な説明 In addition, the hot press device used in the corrugated board forming process is ready for use in the next forming when the skin material bonding process is performed, while the cold press device that performs the skin material bonding process is a corrugated cardboard base. Since the material forming process is ready for the next use when it is performed, the machine can be used efficiently by alternately operating it. During the pressing time of the cold press process, the corrugated base material for the molding cycle was charged during the pressurization time of the cold press process, and the mold cardboard substrate and the skin material for the next molding cycle were charged during the hot pressing process. Since each operation can be performed during the pressurization time, the work efficiency can be improved by eliminating the waiting time of the operator. BRIEF DESCRIPTION OF THE FIGURES
第 1図は本発明で使用する平板状の段ボール基材の断面図である。  FIG. 1 is a sectional view of a flat corrugated cardboard substrate used in the present invention.
第 2図は段ボール基材のホットプレス成形工程を示す説明図である。  FIG. 2 is an explanatory view showing a hot press molding step of a cardboard substrate.
第 3図は成形された段ボール基材をコールドプレス装置に移す工程を示す説明 図である。  FIG. 3 is an explanatory view showing a step of transferring a molded cardboard substrate to a cold press device.
第 4図はコールドプレスによる成形段ボ一ル基材と化粧表皮材の接着工程を示 す説明図である。  FIG. 4 is an explanatory diagram showing a process of bonding a molded corrugated ball base material and a decorative skin material by cold pressing.
第 5図は製品の脱型工程を示す説明図である。  FIG. 5 is an explanatory diagram showing a product release process.
第 6図は製品段ボール製内装材の断面図である。 発明を実施するための最良の形態  Fig. 6 is a cross-sectional view of a product corrugated cardboard interior material. BEST MODE FOR CARRYING OUT THE INVENTION
本発明をより詳細に説述するために、 添付の図面に従つてこれを説明する。 図において、 Aは本発明の方法に使用する段ボール基材で、該段ボール基材 A は波形に成形された中芯 1と、該中芯の両側に夫々ポリエチレンフィルム等の熱 可塑性樹脂フィルム 2、 3を介して貼台されたライナ一 4、 5とからなっており 、一方のライナー 4が中芯 1と完全に接着しているのに対して他方のライナ一 5 はプレス成形時、該ライナ一 5と中芯 1との相対滑りを許容するようにその両辺 部のみにおいて仮止め状に止められている。  The present invention will be described in more detail with reference to the accompanying drawings. In the figure, A is a corrugated cardboard substrate used in the method of the present invention. The corrugated cardboard substrate A is a corrugated core 1, and a thermoplastic resin film 2 such as a polyethylene film on both sides of the core, respectively. The liner 4 is bonded to the core 1 via a liner 3, and one of the liners 4 is completely bonded to the core 1, while the other liner 5 is pressed during press forming. Only five sides are temporarily fixed so as to allow relative sliding between the core 5 and the core 1.
この段ボール基材は通常、 平板状を呈している。  This corrugated cardboard substrate usually has a flat plate shape.
そして、 本発明方法では先ず、上記平板状の段ボール基材 Aをホットプレス装 置 Bで加熱、加圧して所定の形状に成形する。  Then, in the method of the present invention, first, the flat plate-shaped corrugated cardboard substrate A is heated and pressed by a hot press device B to form a predetermined shape.
ホットプレス装置 Bは雌型からなる固定下型 B 1と雄型からなる可動上型 B 2 からなる従来周知の構造、形態を有し、 図示してはいないが、 これら両型 B l、 B 2の成形面部は適当な加熱手段により所要の成形温度に加熱するようにしてあ る。  The hot press device B has a conventionally known structure and form including a fixed lower die B1 composed of a female die and a movable upper die B2 composed of a male die. The molding surface portion 2 is heated to a required molding temperature by a suitable heating means.
上記段ボール基材 Aは、 中芯 1に仮止めしたライナ一 5を上面にして、 ホット プレス装置 Bの固定下型 B 1上に載置し、可動上型 B 2を下降させて両型 B 1、 B 2間で加圧、加熱して成形する。  The corrugated cardboard substrate A is placed on the fixed lower die B1 of the hot press device B with the liner 5 temporarily fixed to the core 1 facing upward, and the movable upper die B2 is lowered to form both die B Press and heat between 1 and B 2 to form.
_ Q _ このホットプレス工程では、成形が終了して脱型した後に、 成形後の段ボール 基材 A， （以後、 成形段ボール基材という） 表面に後述の熱可溶性接着剤 6を溶 融させるに足る余熱力残り得る程度に高温ではあるが、 成形時に段ボール基材 A の紙を焦がさない程度の温度で加熱する。 _ Q _ In this hot pressing process, after the molding is completed and the mold is released, the residual heat power sufficient to melt the below-mentioned heat-soluble adhesive 6 on the surface of the molded cardboard substrate A (hereinafter referred to as molded cardboard substrate) Although it is hot enough to remain, it is heated at a temperature that does not burn the cardboard substrate A paper during molding.
この加熱温度は、 例えば、 熱可溶性接着剤が 130 °Cで溶融するホットメノレトフ イルムである場合、 加熱温度は 220 °C程度とするのが望ましい。  For example, when the heat-soluble adhesive is a hot menoleto film that melts at 130 ° C., the heating temperature is preferably about 220 ° C.
一般に段ボールの成形では、 中芯 1とライナー 4、 5との間に介在させるポリ エチレンフィルム等の熱可塑性樹脂フィルム 2、 3を溶融させるためにホットプ レス成形を用いるので、 加熱温度をこの熱可塑性樹脂フィルム 2、 3を溶融させ るに足る 130 °C程度としているが、上記のようにそれより大幅に高温の加熱温度 で成形することにより、 フィルム 2、 3の溶融が早くなり、 プレス時間を短縮す ることが可能となる。  In general, in cardboard molding, hot press molding is used to melt thermoplastic resin films 2 and 3 such as a polyethylene film interposed between the core 1 and the liners 4 and 5. The temperature is set at about 130 ° C, which is sufficient to melt the resin films 2 and 3.However, as described above, by molding at a heating temperature significantly higher than that, the melting of the films 2 and 3 becomes faster, and the pressing time is reduced. It can be shortened.
而して、 ホットプレス装置 Bでの成形終了後、可動上型 B 2を上昇させて成形 された段ボール基材 A' を固定下型 B 1から脱型する。  After completion of the molding by the hot press device B, the movable upper die B2 is raised, and the molded cardboard base material A 'is released from the fixed lower die B1.
この状態において中芯 1とライナ一 4、 5との間に介在されている樹脂フィル ム 2、 3は溶融状態にあり、未だ固化していないので、成形された段ボール基材 A， はスプリングバック力起こり得る状態にある。  In this state, the resin films 2 and 3 interposed between the core 1 and the liners 1 and 4 are in a molten state and have not yet been solidified. Forces are in a possible state.
上記成形が終り脱型した段ボール基材 A' は、 直ちにコールドプレス装置じに 移し、 その表面に熱可溶性接着剤 6を介して化粧表皮材 7を重ねて加圧する。 そしてこの間、詳しくはコ一ルドプレス装置 Cで段ボール基材 A' と化粧表皮 材 7を加圧している間に、前記成形した段ボール基材 A' を脱型した後のホット プレス装置 Bには、次の成形サイクルのための段ボール基材 Aが投入される。 上記化粧表皮材 7は、 製造する段ボール製内装材 Dが例えば自動車の天井内装 材の場合、通常樹脂シートからなり、 また熱可溶性接着剤 6は例えばポリオレフ イン系またはポリアミ ド系のホットメルトフィルムからなっており、 このホット メルトフィルムは図示例のように化桩表皮材 7の裏面に予めラミネートしておい てもよいし、 フィルムシ一ト状に形成したものをコールドプレス装置 Cに移した 成形段ボール基材 A' 上に載置するようにしてもよい。  The corrugated cardboard substrate A ′, which has been removed from the mold after the above-mentioned molding, is immediately transferred to a cold press machine, and a decorative skin material 7 is overlaid on the surface thereof with a heat-soluble adhesive 6 and pressed. During this time, in detail, while the corrugated cardboard substrate A 'and the decorative skin material 7 are being pressed by the cold press device C, the hot press device B after removing the molded corrugated cardboard substrate A' The cardboard substrate A for the next molding cycle is charged. The decorative skin material 7 is usually made of a resin sheet when the cardboard interior material D to be manufactured is, for example, a ceiling interior material of an automobile, and the heat-soluble adhesive 6 is made of, for example, a polyolefin-based or polyamide-based hot melt film. This hot melt film may be preliminarily laminated on the back surface of the skin material 7 as shown in the illustrated example, or may be formed into a film sheet and transferred to a cold press machine C. It may be placed on the cardboard substrate A '.
一方、上記コールドプレス装置 Cはホットプレス装置 B同様、 雌型の固定下型 C 1と雄型の可動上型 C 2からなるものである力 加熱装置を備えていない点で ホットプレス装置とは異なっており、 必要によっては成形面を冷却するための冷 却装置を備えることもある。 On the other hand, the cold press C is the same as the hot press B, and the female fixed lower die It differs from a hot press device in that it does not have a heating device, which consists of C1 and a male movable upper die C2.It must have a cooling device to cool the molding surface if necessary. There is also.
このコールドプレス装置 Cの上下両型 C 1、 C 2の成形部は上記ホットプレス 装置 Bの上下両型 B 1、 B 2よりクリァランスが化粧表皮材 7の厚さ相当分大き く形成されている以外はホッ トプレス装置 Bの上下両型 B 1、 B 2の成形部と全 く同じ形状に形成されている。  In the forming part of the upper and lower molds C 1 and C 2 of the cold press machine C, the clearance is formed larger than that of the upper and lower molds B 1 and B 2 of the hot press machine B by an amount corresponding to the thickness of the decorative skin material 7. Except for the above, it is formed in exactly the same shape as the molded portions of the upper and lower dies B1, B2 of the hot press device B.
このコールドプレス工程においては、 前記ホットプレス装置 Bから脱型されて コールドプレス装置 Cに投入された段ボール基材 A， に未だホットメルトフィル ム 6を溶融させるに足る 130 °C程度の余熱が残っており、 ホットメルトフィルム 6がこの成形段ボール基材 A， の余熱により溶融し、 加圧により段ボール基材 A' と化粧表皮材 7を接着する。  In this cold pressing step, a residual heat of about 130 ° C sufficient to melt the hot melt film 6 still remains on the corrugated cardboard substrate A, which has been removed from the hot press apparatus B and introduced into the cold press apparatus C. The hot-melt film 6 is melted by the residual heat of the molded cardboard substrate A, and adheres the cardboard substrate A 'and the decorative skin material 7 by pressing.
而して、 化粧表皮材 7の接着が終了後、 型 C l、 C 2を開いて脱型し、 製品で ある段ボール製内装材 Dを得る力 上記化粧表皮材接着工程の過程において、 段 ボ一ル基材 A， の中芯 1とライナー 4、 5との間の熱可塑性樹脂 2、 3は温度が 低下する。  Thus, after the decorative skin material 7 has been bonded, the molds C1 and C2 are opened and demolded to obtain the interior material D made of corrugated cardboard, which is a product. The temperature of the thermoplastic resin 2, 3 between the core 1 of the base material A, 1 and the liners 4, 5 decreases.
従って、 脱型時には熱可塑性樹脂 2、 3の固化が進み、 製品 Dの形状が確実に 保持される。  Therefore, during demolding, the solidification of the thermoplastic resins 2 and 3 proceeds, and the shape of the product D is reliably maintained.
尚、 このコールドプレス装置 Cの脱型及び次の成形サイクル用の成形段ボール 基材 A' と表皮材 7の投入はホッ トプレス工程における加熱、 加圧時間中に行う ことができる。 産業上の利用可能性  The removal of the cold press device C and the charging of the molded cardboard substrate A 'and the skin material 7 for the next molding cycle can be performed during the heating and pressurizing time in the hot pressing process. Industrial applicability
以上のように本発明にかかる段ボール製内装材の成形方法は、 段ボール基材を 用いて自動車、 船舶、 家屋等の内装材を製造する方法として有用であり、 特に局 面や屈曲部を持つ内装材の製造に適している。  INDUSTRIAL APPLICABILITY As described above, the method for forming an interior material made of corrugated cardboard according to the present invention is useful as a method for manufacturing interior materials for automobiles, ships, houses, etc. using a corrugated cardboard substrate. Suitable for wood production.

Claims

請求の範囲 The scope of the claims
1. 波形中芯の両側に熱可塑性樹脂フィルムを介してライナーを貼合した平板状 段ボール基材をホットプレス装置によって、 成形が終了して脱型した後に段ボー ル基材表面に熱可溶性接着剤を溶融させるに足る余熱が残り得る程度に高温で、 しかも成形時に段ボール基材を構成する紙力焦げない程度の温度で加熱、加圧成 形する工程、 この成形された段ボール基材を脱型して直ちにコールドプレス装置 の成形型に移し、 その表面に熱可溶性接着剤を介して化粧表皮材を重ねる工程、 コールドプレスにより上記成形段ボール基材と化粧表皮材とを加圧密着させ、段 ボール基材と化粧表皮材との間の熱可溶性接着剤を段ボール基材の余熱を利用し て溶融させ両者を接着する工程を備えることを特徴とする段ボール製内装材の成 形方法。  1. Using a hot press machine, a flat corrugated cardboard substrate with a liner bonded on both sides of the corrugated core via a thermoplastic resin film is finished after molding and then released from the mold. Heating and press forming at a temperature high enough to leave residual heat sufficient to melt the agent, and at a temperature that does not scorch the paper forming the corrugated cardboard substrate during molding. The mold is immediately transferred to a molding die of a cold press machine, and a decorative skin material is laminated on the surface of the molding corrugated material via a heat-soluble adhesive. A method for forming a corrugated cardboard interior material, comprising a step of melting a heat-soluble adhesive between a ball base material and a decorative skin material by utilizing residual heat of the corrugated cardboard substrate and bonding the two.
2. 段ボール基材の中芯とラィナ一との間に介在し段ボール基材の成形工程にお いて溶融した熱可塑性樹脂が、 段ボール基材と化粧表皮材とを接着させる工程中 に固化されることを特徵とする請求の範囲第 1項記載の段ボール製内装材の成形 方法。  2. The thermoplastic resin interposed between the core of the corrugated cardboard substrate and the liner and melted in the corrugated cardboard molding process is solidified during the bonding process between the corrugated cardboard substrate and the decorative skin material. 2. The method for forming a corrugated cardboard interior material according to claim 1, characterized in that:
PCT/JP1993/000951 1992-07-10 1993-07-09 Method of molding interior finishing material of cardboard WO1994001274A1 (en)

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GB9320497A GB2273906B (en) 1992-07-10 1993-07-09 Forming method for interior trim material made of corrugated cardboard

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JP4/183688 1992-07-10
JP4183688A JP2609032B2 (en) 1992-07-10 1992-07-10 Molding method for cardboard interior materials

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JP5916066B2 (en) * 2011-10-25 2016-05-11 富士ダンボール工業株式会社 Method and apparatus for manufacturing curved corrugated cardboard sheet
JP5930755B2 (en) * 2012-02-14 2016-06-08 丸一興業株式会社 Method for forming curved corrugated cardboard
KR101486365B1 (en) * 2014-08-08 2015-01-26 (주)아주프라텍 Apparatus and method of manufacturing Plastic corrugated carboard

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GB9320497D0 (en) 1994-04-27

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