JP3120029B2 - Vacuum forming method - Google Patents
Vacuum forming methodInfo
- Publication number
- JP3120029B2 JP3120029B2 JP29311395A JP29311395A JP3120029B2 JP 3120029 B2 JP3120029 B2 JP 3120029B2 JP 29311395 A JP29311395 A JP 29311395A JP 29311395 A JP29311395 A JP 29311395A JP 3120029 B2 JP3120029 B2 JP 3120029B2
- Authority
- JP
- Japan
- Prior art keywords
- laminated sheet
- base material
- vacuum
- cushion layer
- mold
- 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.)
- Expired - Fee Related
Links
Classifications
-
- 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
- B29C51/082—Deep drawing or matched-mould forming, i.e. using mechanical means only by shaping between complementary mould parts
- B29C51/087—Deep drawing or matched-mould forming, i.e. using mechanical means only by shaping between complementary mould parts with at least one of the mould parts comprising independently movable sections
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Blow-Moulding Or Thermoforming Of Plastics Or The Like (AREA)
Description
【０００１】[0001]
【発明の属する技術分野】本発明は自動車等に使用する
内装体を成形する真空成形方法に関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a vacuum forming method for forming an interior body used in an automobile or the like.
【０００２】[0002]
【従来の技術】自動車のインストルメントパネル等を組
込む内装体として、基材に積層シートを圧接したものを
使用し、積層シートは、発泡体からなるクッション層と
表皮層とを積層したものからなる。基材と積層シートを
圧接する圧接装置として、実公昭５９−３８２７６号
公報「合成樹脂シートの成形装置」や実開平３−７４
９２７号公報「樹脂製シート用真空成形型」が知られて
いる。上記は成形型の凸部を角ばった形状に形成し、
この金型で基材と積層シートとを圧接して積層シートの
凸部を角ばった形状に成形するもので、は成形型のエ
ッジ部にヒータを設けて、このヒータで積層シートを軟
化させて積層シートの凸部を角ばった形状に成形するも
のである。2. Description of the Related Art As an interior body in which an instrument panel or the like of an automobile is incorporated, a laminate sheet is pressed against a base material, and the laminate sheet is formed by laminating a cushion layer made of foam and a skin layer. . As a press-contact device for press-contacting a base material and a laminated sheet, Japanese Unexamined Utility Model Publication No. Sho 59-38276, “Synthetic resin sheet molding device” and Japanese Utility Model Application Laid-Open No. 3-74 are known.
No. 927, “Vacuum Mold for Resin Sheet” is known. The above forms the convex part of the mold into a square shape,
In this mold, the base material and the laminated sheet are pressed against each other to form the convex portion of the laminated sheet into a square shape. A heater is provided at the edge of the molding die, and the laminated sheet is softened by the heater. This is to form the convex portion of the laminated sheet into a square shape.
【０００３】[0003]
【発明が解決しようとする課題】図１３は従来の圧接装
置で基材に積層シートを貼着した状態の断面図である。
上記の圧接装置を使用して、発泡体のクッション層１
００ａを備えた積層シート１００を基材１０１に沿って
賦形する場合、賦形中の積層シート１００を点Ｐ1を起
点として引き伸ばし、基材１０１の凸部でクッション層
１００ａを押し潰ぶす。従って、積層シート１００の表
皮層１００ｂは凸部の半径が大きくなり、凸部を角ばっ
た形状に成形することが困難である。FIG. 13 is a cross-sectional view showing a state in which a laminated sheet is adhered to a substrate by a conventional pressure welding apparatus.
Using the above-described pressing device, the foam cushion layer 1
When the laminated sheet 100 provided with 00a is formed along the substrate 101, the laminated sheet 100 being formed is stretched starting from the point P1, and the cushion layer 100a is crushed by the convex portion of the substrate 101. Accordingly, the skin layer 100b of the laminated sheet 100 has a large radius of the convex portion, and it is difficult to form the convex portion into a square shape.
【０００４】また、の圧接装置を使用して、発泡体の
クッション層１００ａを備えた積層シート１００を基材
１０１に沿って賦形する場合、ヒータと積層シートの間
に基材を配置するので、ヒータの熱で積層シートを十分
に軟化することができない。従って、この場合積層ヒー
トの凸部を角ばった形状に成形することができない。Further, when the laminated sheet 100 provided with the foam cushion layer 100a is formed along the substrate 101 by using the pressure contact device, the substrate is disposed between the heater and the laminated sheet. In addition, the laminated sheet cannot be sufficiently softened by the heat of the heater. Therefore, in this case, the convex portion of the lamination heat cannot be formed into a square shape.
【０００５】そこで、本発明の目的は、発泡体のクッシ
ョン層を備えた積層シートを基材に圧接する際に、積層
シートの角部を角ばった形状に成形することができる技
術を提供することにある。It is an object of the present invention to provide a technique capable of forming a corner of a laminated sheet into a square shape when a laminated sheet having a foam cushion layer is pressed against a substrate. It is in.
【０００６】[0006]
【課題を解決するための手段】上記課題を解決するため
に本発明の請求項１は、複数のバキューム穴を有すると
ともに成形時に凸なる箇所に予め突起を一体的に形成す
る基材製造工程と、この基材をバキューム穴を有する雄
型に被せる工程と、この基材上に、表皮層とクッション
層とからなる積層シートを、クッション層が前記突起に
臨む形態で載置し、これら積層シート及び基材とを雌型
で雄型へ抑える工程と、前記バキューム穴を介して基材
に積層シートを密着する真空吸着工程とからなる。In order to solve the above-mentioned problems, a first aspect of the present invention is to provide a base material manufacturing step which has a plurality of vacuum holes and integrally forms projections in advance at convex portions at the time of molding. A step of covering the base material with a male mold having a vacuum hole, and placing a laminated sheet including a skin layer and a cushion layer on the base material so that the cushion layer faces the protrusions. And a step of suppressing the base material from the female mold to the male mold, and a vacuum suction step of bringing the laminated sheet into close contact with the base material through the vacuum hole.
【０００７】基材の凸なる箇所に予め突起を一体的に形
成したので、この突起で積層シートのクッション層を押
圧して、この押圧部分の反対側（即ち、表皮層側）にク
ッション層を***させる。そして、このクッション層の
***と、雌型による積層シートの引延ばしによるクッシ
ョン層の潰れとを相殺することにより、積層シートは突
起の位置を起点として引延ばしが開始することになる。[0007] Since the protrusions are previously formed integrally on the convex portions of the base material, the protrusions press the cushion layer of the laminated sheet, and the cushion layer is formed on the opposite side (ie, the skin layer side) of the pressed portion. Uplift. By offsetting the bump of the cushion layer and the crushing of the cushion layer due to the stretching of the laminated sheet by the female mold, the stretching of the laminated sheet starts from the position of the protrusion.
【０００８】請求項２は、前記突起を、前記成形型の型
開き方向へ突出させたことを特徴とする。基材に形成し
た突起が、基材の凸部を形成する縦壁面から突出しない
ので、基材製造のための金型にアンダーカット部を構成
する必要がない。従って、基材製造用金型の構造を複雑
にしないで積層シートの角部を角ばった形状にすること
ができる。According to a second aspect of the present invention, the projection is projected in a mold opening direction of the molding die. Since the projections formed on the base material do not protrude from the vertical wall surface forming the projections of the base material, it is not necessary to form an undercut portion in a mold for manufacturing the base material. Therefore, the corners of the laminated sheet can be formed into a square shape without complicating the structure of the mold for manufacturing the base material.
【０００９】[0009]
【００１０】[0010]
【発明の実施の形態】本発明の実施の形態を添付図に基
づいて以下に説明する。なお、図面は符号の向きに見る
ものとする。図１は本発明に係る真空成形装置の断面図
であり、真空成形装置１は、基台２にボルト止めすると
共に基材３を配置する雄型４と、雄型４の上方に昇降自
在に支持した昇降台５と、昇降台５にボルト止めすると
共に雄型４に対向して配置した雌型６と、積層シート７
を雌型６及び雄型４の両側に張っぱるシートクランプ８
ａ，８ｂを備える。雌型６は、シリンダ１４と、シリン
ダ１４のロッド１４ａに取付けたプラグ１５を備えてい
る。４ａはバキューム穴、６ａはブロー穴、９は積層シ
ート７と雌型６とで形成する空間である。また、２ａは
排気穴，５ａは給気穴である。Embodiments of the present invention will be described below with reference to the accompanying drawings. The drawings should be viewed in the direction of reference numerals. FIG. 1 is a cross-sectional view of a vacuum forming apparatus according to the present invention. The vacuum forming apparatus 1 is bolted to a base 2 and has a male mold 4 on which a base material 3 is arranged, and is capable of ascending and descending above the male mold 4. A supporting platform 5, a female die 6 bolted to the lifting platform 5 and arranged opposite the male die 4,
Sheet clamps 8 that tension both sides of the female mold 6 and the male mold 4
a, 8b. The female mold 6 includes a cylinder 14 and a plug 15 attached to a rod 14a of the cylinder 14. 4a is a vacuum hole, 6a is a blow hole, and 9 is a space formed by the laminated sheet 7 and the female die 6. 2a is an exhaust hole, and 5a is an air supply hole.
【００１１】図２は本発明に係る真空成形方法用の基材
をプリフォームした断面図であり、プリフォームした基
材３の凹部３ａ，３ｂの角部周縁に突起１０，１１を形
成した状態を示す。この基材３は、ＡＢＳ樹脂で成形
し、凹部３ａ，３ｂの内壁部は垂直状態に立上がってい
る。３ｃはバキューム穴であり、バキューム穴３ｃ…は
雄型のバキューム穴４ａ…（図１参照）に連通する。FIG. 2 is a cross-sectional view of a preformed base material for a vacuum forming method according to the present invention, in which protrusions 10 and 11 are formed on corners of concave portions 3a and 3b of the preformed base material 3. Is shown. The base material 3 is formed of ABS resin, and the inner walls of the recesses 3a and 3b stand upright. Reference numeral 3c denotes a vacuum hole, and the vacuum holes 3c communicate with the male vacuum holes 4a (see FIG. 1).
【００１２】図３は本発明に係る積層シートの断面図で
あり、積層シート７を、ポリ塩化ビニル（ＰＶＣ）で形
成した表皮層７ａと、発泡体（ＰＰＦ）で形成したクッ
ション層７ｂとで積層した状態を示す。FIG. 3 is a sectional view of the laminated sheet according to the present invention. The laminated sheet 7 is composed of a skin layer 7a formed of polyvinyl chloride (PVC) and a cushion layer 7b formed of foam (PPF). This shows a state in which the layers are stacked.
【００１３】以上の構成からなる真空成形装置の作用を
図４〜図７に基づいて述べる。図４において、プリフォ
ームした基材３を雄型４に載置した後、積層シート７を
加熱軟化し、加熱軟化した積層シート７を一対のシート
クランプ８ａ，８ｂで張設する。この場合、積層シート
７のクッション層７ｂが下側に位置する。The operation of the vacuum forming apparatus having the above configuration will be described with reference to FIGS. In FIG. 4, after the preformed base material 3 is placed on the male mold 4, the laminated sheet 7 is heated and softened, and the heated and softened laminated sheet 7 is stretched by a pair of sheet clamps 8a and 8b. In this case, the cushion layer 7b of the laminated sheet 7 is located on the lower side.
【００１４】図５において、一対のシートクランプ８
ａ，８ｂを所定位置まで下降する。この場合、積層シー
ト７の中央部が基材３に当接する。In FIG. 5, a pair of sheet clamps 8
a, 8b is lowered to a predetermined position. In this case, the central portion of the laminated sheet 7 contacts the substrate 3.
【００１５】図６において、雌型６を真空成形位置まで
下降して真空成形する。これにより、雄型４の周縁と雌
型６の周縁とで積層シート７を挟持して積層シート７と
雌型６とで空間９を形成する。この場合、雌型６の凸部
６ｂが積層シート７を基材３の凹部３ａ内に押し込む。
次に、雌型６に取り付けたシリンダ１４のロッド１４ａ
を伸長して、雌型６内に格納したプラグ１５を突出す
る。これにより、プラグ１５が基材３の凹部３ｂ内に嵌
入して積層シート７を凹部３ｂ内に押し込む。In FIG. 6, the female mold 6 is lowered to a vacuum forming position and vacuum formed. As a result, the laminated sheet 7 is sandwiched between the peripheral edge of the male mold 4 and the peripheral edge of the female mold 6 to form a space 9 between the laminated sheet 7 and the female mold 6. In this case, the convex portion 6b of the female die 6 pushes the laminated sheet 7 into the concave portion 3a of the base material 3.
Next, the rod 14a of the cylinder 14 attached to the female mold 6
To extend the plug 15 stored in the female mold 6. As a result, the plug 15 fits into the concave portion 3b of the base material 3, and pushes the laminated sheet 7 into the concave portion 3b.
【００１６】次いで、バキューム工程で、基台２の排気
穴２ａ等を介して雄型４の空間１７に連通した真空ポン
プ（図示しない。）を駆動して、バキューム穴４ａ，３
ｃを経て積層シート７と基材３との間のエアを除去す
る。このバキューム工程の開始後、ブロー工程を実施
し、昇降台５の給気穴５ａを介して雌型６の空間１８に
連通した給気ポンプ（図示しない。）を駆動して、ブロ
ー穴６ａ…を経て空間９内にエアを供給する。これによ
り、積層シート７と基材３との間のエアを除去した状態
で積層シート７の表皮層７ａをエア圧で加圧して基材３
と積層シート７とを圧接する。圧接完了後、基材３及び
積層シート７を冷却して、冷却完了後雌型６を上昇して
型開きを行ない、一体に積層した基材３及び積層シート
７を雄型４から払い出す。Next, in a vacuum step, a vacuum pump (not shown) connected to the space 17 of the male mold 4 via the exhaust hole 2a of the base 2 and the like is driven to drive the vacuum holes 4a, 3a.
The air between the laminated sheet 7 and the base material 3 is removed via c. After the start of the vacuum process, a blow process is performed, and an air supply pump (not shown) connected to the space 18 of the female die 6 via the air supply hole 5a of the lift 5 is driven to drive the blow holes 6a. The air is supplied into the space 9 through. As a result, the skin layer 7a of the laminated sheet 7 is pressurized with air pressure while the air between the laminated sheet 7 and the
And the laminated sheet 7 are pressed. After the completion of the pressing, the substrate 3 and the laminated sheet 7 are cooled, and after the cooling is completed, the female mold 6 is lifted to open the mold, and the integrally laminated substrate 3 and the laminated sheet 7 are discharged from the male mold 4.
【００１７】図７において、雌型６の凸部６ｂで積層シ
ート７を基材３の凹部３ａ内に押し込む。前工程で説明
したように、雌型６の凸部６ｂで積層シート７を基材３
の凹部３ａ内に押し込むことにより、積層シート７のク
ッション層７ｂを基材３の角部で押し潰しながら表皮層
７ａを引き延ばす。In FIG. 7, the laminated sheet 7 is pushed into the concave portion 3a of the substrate 3 by the convex portion 6b of the female die 6. As explained in the previous step, the laminated sheet 7 is
, The skin layer 7a is stretched while crushing the cushion layer 7b of the laminated sheet 7 at the corner of the base material 3.
【００１８】この場合、基材３の凹部３ａの角部周縁に
突起１０を備えたので、突起１０でクッション層７ｂを
押圧して、この押圧部分の反対側（即ち、表皮層７ａ
側）にクッション層７ｂを***させる。従って、突起１
０によるクッション層７ｂの***と、前述した雌型６の
凸部６ｂの押込みによるクッション層７ｂの潰れとが相
殺されて、積層シート７は突起１０の上方位置Ｐ2まで
平坦に保たれ、上方位置Ｐ2を起点として引延ばしが開
始する。この上方位置Ｐ2は、凹部３ａの壁部上方に位
置して、図１３に示す従来技術の位置Ｐ1の内側に位置
するので、積層シート７の角部が角ばった形状になる。In this case, since the projections 10 are provided on the corners of the concave portion 3a of the base material 3, the cushion layer 7b is pressed by the projections 10 and the opposite side of the pressed portion (ie, the skin layer 7a).
Side), the cushion layer 7b is raised. Therefore, protrusion 1
0, and the crushing of the cushion layer 7b due to the depression of the convex portion 6b of the female mold 6 described above is offset, and the laminated sheet 7 is kept flat up to the upper position P2 of the protrusion 10, and Stretching starts from P2. Since the upper position P2 is located above the wall of the recess 3a and inside the conventional position P1 shown in FIG. 13 , the corners of the laminated sheet 7 have a square shape.
【００１９】この効果は、基材３の凹部３ａの段差を深
くして積層シート７の延びが大きくなる程顕著になり、
また、クッション層が厚い程顕著になる。そして、引延
ばした後の積層シート７の厚みを、成形前の積層シート
７の厚みの半分以下にすることにより、積層シート７の
角部の半径が成形前の積層シート７の厚みより小さくな
ることがわかった。This effect becomes more remarkable as the depth of the concave portion 3a of the base material 3 is increased and the extension of the laminated sheet 7 is increased.
Further, it becomes more remarkable as the cushion layer is thicker. Then, by making the thickness of the laminated sheet 7 after stretching less than half the thickness of the laminated sheet 7 before molding, the radius of the corner of the laminated sheet 7 becomes smaller than the thickness of the laminated sheet 7 before molding. I understand.
【００２０】第１実施の形態の場合、基材３に形成した
突起１０を、成形型の型開き方向へ突出させたので、突
起１０が、基材３の凹部３ａの縦壁面から突出しない。
従って、アンダーカット部を構成する必要がないので、
金型の構造を複雑にしないで積層シートの角部を角ばっ
た形状にすることができる。In the case of the first embodiment, since the projections 10 formed on the base 3 are projected in the mold opening direction of the molding die, the projections 10 do not protrude from the vertical wall surface of the concave portion 3a of the base 3.
Therefore, there is no need to configure the undercut part,
The corners of the laminated sheet can be squared without complicating the structure of the mold.
【００２１】図８（ａ）〜（ｃ）は本発明に係る第２〜
第４実施の形態の断面図である。（ａ）は本発明に係る
第２実施の形態であり、基材２０の角部からその角部の
頂点方向より延在して先細状に突出した３角形の突起２
０ａを示したものである。このように、突起２０ａを基
材２０の角部からその角部の頂点方向より延在して突出
させることにより、突起２０ａの先端部が積層シート７
の角部（以下、凸角と呼ぶ。）７ｃの近傍に位置するの
で、積層シート７を第１実施の形態より好適な凸角に形
成することができる。すなわち、積層シート７の凸角の
半径（以下、凸角半径と呼ぶ。）を小さくすることがで
きる。FIGS. 8A to 8C show second to second embodiments according to the present invention.
It is sectional drawing of 4th Embodiment. (A) is a second embodiment according to the present invention, and is a triangular projection 2 that extends from a corner of the base material 20 in a vertex direction of the corner and protrudes in a tapered shape.
0a. In this manner, by projecting the projection 20a from the corner of the base material 20 so as to extend from the vertex direction of the corner, the tip of the projection 20a is placed on the laminated sheet 7.
(Hereinafter, referred to as a convex angle) 7c, the laminated sheet 7 can be formed with a more suitable convex angle than the first embodiment. That is, the radius of the convex angle of the laminated sheet 7 (hereinafter, referred to as the convex angle radius) can be reduced.
【００２２】（ｂ）は本発明に係る第３実施の形態であ
り、基材２１を成形する際に、基材２１の角部２１ａの
厚みを他の部分より厚くした状態で成形し、成形後の凝
固に伴う成形収縮（ひけ）を利用して、基材２１の角部
からその角部の頂点方向より延在して先細状に突出させ
た突起２１ｂを示したものである。(B) is a third embodiment according to the present invention, in which when forming the base member 21, the corner portion 21a of the base member 21 is formed with a greater thickness than the other portions. The projections 21b extend from the corners of the base material 21 to the apexes of the corners and project in a tapered shape by utilizing molding shrinkage (sinking) accompanying solidification later.
【００２３】（ｃ）は本発明に係る第４実施の形態であ
り、基材２２と同一材（ＡＢＳ樹脂）の突起部材２３を
基材２２の角部に接着又は溶着して、基材２２の角部か
らその角部の頂点方向より延在して突出させた突起を示
したものである。突起部材２３はＡＢＳ樹脂に限らず他
の樹脂材や針金等を使用してもよい。(C) is a fourth embodiment according to the present invention, in which a projection member 23 made of the same material (ABS resin) as the base member 22 is adhered or welded to a corner of the base member 22, and 3 shows a projection extending from the corner of the above-mentioned corner and projecting from the vertex direction of the corner. The protruding member 23 is not limited to the ABS resin, but may be another resin material, wire, or the like.
【００２４】[0024]
【００２５】[0025]
【００２６】[0026]
【００２７】[0027]
【発明の実施例】本発明に係る第１実施の形態の実施例
を説明する。図９は本発明に係る第１実施の形態で積層
したインストルメントパネルの正面図である。インスト
ルメントパネル２８は、本発明に係る真空成形方法で基
材３と積層シート７とを一体に積層したものであり、中
央にセンターコンソール用開口部２８ａと、その右側に
メーターパネル用開口部２８ｂと、左側部に助手席側の
アウトレット用開口部２８ｃと、右側部に運転席側のア
ウトレット用開口部２８ｄを備える。DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the first embodiment according to the present invention will be described. FIG. 9 is a front view of the instrument panels stacked in the first embodiment according to the present invention. The instrument panel 28 is obtained by integrally laminating the base material 3 and the laminated sheet 7 by the vacuum forming method according to the present invention, and has a center console opening 28a in the center and a meter panel opening 28b on the right side thereof. An outlet opening 28c on the passenger seat side is provided on the left side, and an outlet opening 28d on the driver side is provided on the right side.
【００２８】図１０は本発明に係る突起付きの真空成形
方法と、突起なしの従来方法とで成形したインストルメ
ントパネル２８を比較したグラフである。このグラフ
は、縦軸に積層シート７の角部の半径（以下、凸角半径
と呼ぶ。）を示し、横軸に凸角半径の測定位置を示す。
●は本発明の真空成形方法で成形した実施例を示し、○
は従来の真空成形方法で成形した比較例を示す。また、
左側のグラフは助手席側のアウトレット用開口部２８ｃ
の位置Ａ、位置Ｂ、位置Ｃの凸角半径を示し、右側のグ
ラフは運転席側のアウトレット用開口部２８ｄの位置
Ａ、位置Ｂ、位置Ｃの凸角半径を示す。このグラフから
明らかなように、実施例の方が比較例の場合より凸角半
径が小さくなり、角部を角ばった形状に成形することが
できることがわかる。FIG. 10 is a graph comparing the instrument panel 28 formed by the vacuum forming method with protrusions according to the present invention with the conventional method without protrusions. In this graph, the vertical axis indicates the radius of the corner of the laminated sheet 7 (hereinafter, referred to as a convex angle radius), and the horizontal axis indicates the measurement position of the convex angle radius.
● indicates an example formed by the vacuum forming method of the present invention,
Shows a comparative example formed by a conventional vacuum forming method. Also,
The graph on the left is the outlet opening 28c on the passenger side.
The graph on the right side shows the convex corner radii at the positions A, B, and C of the outlet opening 28d on the driver's seat side. As is clear from this graph, the radius of the convex angle is smaller in the example than in the comparative example, and it can be seen that the corner can be formed into a square shape.
【００２９】図１１（ａ）〜（ｃ）は第１実施の形態の
突起の形状を示す。 （ａ）は高さ２．０ｍｍ、幅２．０ｍｍの断面矩形の突
起１０ａを示す。 （ｂ）は高さ１．０ｍｍ、幅２．０ｍｍの断面矩形の突
起１０ｂを示す。 （ｃ）は高さ０．５ｍｍ、幅０．５ｍｍの断面矩形の突
起１０ｃを示す。FIGS. 11A to 11C show the shapes of the projections according to the first embodiment. (A) shows a protrusion 10a having a rectangular cross section having a height of 2.0 mm and a width of 2.0 mm. (B) shows a projection 10b having a rectangular cross section with a height of 1.0 mm and a width of 2.0 mm. (C) shows a projection 10c having a rectangular cross section with a height of 0.5 mm and a width of 0.5 mm.
【００３０】図１２（ａ）〜（ｃ）は突起形状と積層シ
ートの角部形状との関係の説明図である。積層シート７
は表皮層７ａの厚みが０．６ｍｍ、クッション層７ｂの
厚みが２．０ｍｍのものを使用する。 （ａ）は、図１１（ａ）の突起１０ａを使用して積層シ
ート７の角部を角ばった状態に形成する場合の説明図で
ある。図から明らかなように、突起１０ａによるクッシ
ョン層７ｂの***が、雌型６の凸部６ｂ（図７参照）の
押込みによるクッション層７ｂの潰れより大きくなるの
で、積層シート７は突起１０ａの上方位置Ｐ2が***し
て、積層シート７は突起１０ａの上方で***して好適な
凸角部を得にくいことが判明した。 （ｂ）は、図１１（ｂ）の突起１０ｂを使用して積層シ
ート７の角部を角ばった状態に形成する場合の説明図で
ある。図から明らかなように、突起１０ｂによるクッシ
ョン層７ｂの***が、雌型６の凸部６ｂ（図７参照）の
押込みによるクッション層７ｂの潰れより大きくなるの
で、積層シート７は突起１０ｂの上方位置Ｐ2が***し
て、積層シート７は突起１０ｂの上方で***して好適な
凸角部を得にくいことが判明した。 （ｃ）は、図１１（ｃ）の突起１０ｃを使用して積層シ
ート７の角部を角ばった状態に形成する場合の説明図で
ある。図から明らかなように、突起１０ｃによるクッシ
ョン層７ｂの***と、雌型６の凸部６ｂ（図７参照）の
押込みによるクッション層７ｂの潰れとが相殺されて、
積層シート７は突起１０ｃの上方位置Ｐ2まで平坦に保
たれ、積層シート７の角部が角ばった状態に形成するこ
とができることが判明した。FIG. 12 (a) ~ (c) is an explanatory view of the relationship between the projection-shaped and the corner shape of the laminated sheet. Laminated sheet 7
The thickness of the skin layer 7a is 0.6 mm, and the thickness of the cushion layer 7b is 2.0 mm. (A) is an explanatory view of a case where the corners of the laminated sheet 7 are formed to be square using the protrusions 10a of FIG. 11 (a). As is apparent from the figure, the protrusion of the cushion layer 7b due to the protrusion 10a is larger than the collapse of the cushion layer 7b due to the depression of the convex portion 6b (see FIG. 7) of the female die 6, so that the laminated sheet 7 is located above the protrusion 10a. It was found that the position P2 was raised, and the laminated sheet 7 was raised above the projections 10a, so that it was difficult to obtain a suitable convex corner. (B) is an explanatory view of a case where the corners of the laminated sheet 7 are formed in a square state using the protrusions 10b of FIG. 11 (b). As is apparent from the figure, the protrusion of the cushion layer 7b due to the protrusion 10b is larger than the collapse of the cushion layer 7b due to the depression of the protrusion 6b (see FIG. 7) of the female die 6, so that the laminated sheet 7 is located above the protrusion 10b. It was found that the position P2 was raised, and the laminated sheet 7 was raised above the projection 10b, so that it was difficult to obtain a suitable convex corner. (C) is an explanatory diagram in the case of forming the state of angular corners of the laminated sheet 7 using the projection 10c of FIG. 11 (c). As is apparent from the figure, the protrusion of the cushion layer 7b due to the projection 10c and the collapse of the cushion layer 7b due to the depression of the convex portion 6b (see FIG. 7) of the female die 6 cancel each other,
It has been found that the laminated sheet 7 is kept flat up to the position P2 above the projection 10c, and the corners of the laminated sheet 7 can be formed in a square state.
【００３１】[0031]
【発明の効果】本発明は上記構成により次の効果を発揮
する。請求項１は、基材の凸なる箇所に予め突起を一体
的に形成したので、この突起で積層シートのクッション
層を押圧して、この押圧部分の反対側（即ち、表皮層
側）にクッション層を***させる。そして、このクッシ
ョン層の***と、雌型による積層シートの引延ばすこと
によるクッション層の潰れとを相殺することにより、積
層シートは突起の位置を起点として引延ばしが開始する
ことになる。これにより、積層シートの引延し起点位置
を基材に凸部近傍に設定できるので、積層シートの角部
が角ばった形状になる。According to the present invention, the following effects are exhibited by the above configuration. According to the first aspect of the present invention, since the projection is formed integrally on the convex portion of the base material in advance, the cushion layer of the laminated sheet is pressed by the projection, and the cushion layer is provided on the opposite side (ie, the skin layer side) of the pressed portion. Raise the layer. By offsetting the bump of the cushion layer and the crushing of the cushion layer due to the stretching of the laminated sheet by the female mold, the stretching of the laminated sheet starts from the position of the protrusion. Thereby, the starting position of the stretching of the laminated sheet can be set in the vicinity of the convex portion of the base material, so that the corner of the laminated sheet becomes square.
【００３２】請求項２は、突起を成形型の型開き方向へ
突出させたので、突起が基材の凸部を形成する縦壁面か
ら突出しない。従って、アンダーカット部を構成する必
要がないので、金型の構造を複雑にしないで積層シート
の角部を角ばった形状にすることができる。According to the second aspect of the present invention, since the projection is made to protrude in the mold opening direction of the mold, the projection does not protrude from the vertical wall surface forming the projection of the substrate. Therefore, since it is not necessary to form an undercut portion, the corners of the laminated sheet can be made square without complicating the structure of the mold.
【００３３】[0033]
【図１】本発明に係る真空成形装置の断面図FIG. 1 is a sectional view of a vacuum forming apparatus according to the present invention.
【図２】本発明に係る基材をプリフォームした断面図FIG. 2 is a cross-sectional view of a preformed base material according to the present invention.
【図３】本発明に係る積層シートの断面図FIG. 3 is a sectional view of a laminated sheet according to the present invention.
【図４】本発明に係る真空成形装置の作用図FIG. 4 is an operation diagram of a vacuum forming apparatus according to the present invention.
【図５】本発明に係る真空成形装置の作用図FIG. 5 is an operation diagram of the vacuum forming apparatus according to the present invention.
【図６】本発明に係る真空成形装置の作用図FIG. 6 is an operation diagram of a vacuum forming apparatus according to the present invention.
【図７】本発明に係る真空成形装置の作用図FIG. 7 is an operation diagram of a vacuum forming apparatus according to the present invention.
【図８】本発明に係る第２〜第４実施の形態の断面図FIG. 8 is a sectional view of the second to fourth embodiments according to the present invention.
【図９】本発明に係る第１実施の形態で積層したインス
トルメントパネルの正面図FIG. 9 is a front view of the instrument panels stacked in the first embodiment according to the present invention.
【図１０】本発明に係る真空成形方法と従来方法とを比
較したグラフFIG. 10 is a graph comparing a vacuum forming method according to the present invention with a conventional method.
【図１１】本発明の第１実施の形態の突起の形状を示すFIG. 11 shows a shape of a protrusion according to the first embodiment of the present invention.
【図１２】本発明の突起形状と積層シートの角部形状と
の関係の説明図FIG. 12 is an explanatory diagram of a relationship between a projection shape according to the present invention and a corner shape of a laminated sheet.
【図１３】従来の圧接装置で基材に積層シートを貼着し
た状態の断面図FIG. 13 is a cross-sectional view of a state in which a laminated sheet is adhered to a base material by a conventional pressure welding device.
１…真空成形装置、３…基材、３ｃ…バキューム穴、４
…雄型、４ａ…バキューム穴、３…基材、３ｃ…バキュ
ーム穴、６…雌型、７…積層シート、７ａ…表皮層、７
ｂ…クッション層、１０、１１…突起。DESCRIPTION OF SYMBOLS 1 ... Vacuum forming device, 3 ... Base material, 3c ... Vacuum hole, 4
... male type, 4a ... vacuum hole, 3 ... substrate, 3c ... vacuum hole, 6 ... female type, 7 ... laminated sheet, 7a ... skin layer, 7
b: cushion layer, 10, 11: protrusion.
───────────────────────────────────────────────────── フロントページの続き (72)発明者 佐藤 隆晶 埼玉県狭山市新狭山１丁目10番１ ホン ダエンジニアリング株式会社内 (72)発明者 亀島 彰宏 埼玉県狭山市新狭山１丁目10番１ ホン ダエンジニアリング株式会社内 (72)発明者 木川 圭一 埼玉県狭山市新狭山１丁目10番１ ホン ダエンジニアリング株式会社内 (56)参考文献 特開 平６−55626（ＪＰ，Ａ) 特開 平５−169524（ＪＰ，Ａ) (58)調査した分野(Int.Cl.7，ＤＢ名) B29C 51/00 - 51/46 ──────────────────────────────────────────────────続 き Continuing on the front page (72) Inventor Takaaki Sato 1-10-1 Shinsayama, Sayama City, Saitama Prefecture Inside Honda Engineering Co., Ltd. (72) Inventor Akihiro Kameshima 1-10-1 Shinsayama, Sayama City, Saitama Prefecture Inside Honda Engineering Co., Ltd. (72) Keiichi Kikawa, Inventor 1-10-1 Shinsayama, Sayama City, Saitama Prefecture Inside Honda Engineering Co., Ltd. (56) References JP-A-6-55626 (JP, A) JP-A-5 -169524 (JP, A) (58) Fields investigated (Int. Cl. 7 , DB name) B29C 51/00-51/46
Claims (2)
形時に凸になる箇所に予め突起を一体的に形成する基材
製造工程と、この基材をバキューム穴を有する成形型に
被せる工程と、この基材上に、表皮層とクッション層と
からなる積層シートを、クッション層が前記突起に臨む
形態で載置し、前記バキューム穴を介して基材に積層シ
ートを密着する真空吸着工程とからなる真空成形方法。1. A base material manufacturing step in which a plurality of vacuum holes are formed and projections are integrally formed in advance at a portion which becomes convex during molding, a step of covering the base material with a mold having a vacuum hole, A vacuum suction step of placing a laminated sheet composed of a skin layer and a cushion layer on a material in such a manner that the cushion layer faces the projection, and closely adhering the laminated sheet to the base material through the vacuum hole. Molding method.
突出させたことを特徴とする請求項１記載の真空成形方
法。2. The vacuum forming method according to claim 1, wherein the protrusion is made to protrude in a mold opening direction of the forming die.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP29311395A JP3120029B2 (en) | 1995-11-10 | 1995-11-10 | Vacuum forming method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP29311395A JP3120029B2 (en) | 1995-11-10 | 1995-11-10 | Vacuum forming method |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH09131785A JPH09131785A (en) | 1997-05-20 |
| JP3120029B2 true JP3120029B2 (en) | 2000-12-25 |
Family
ID=17790600
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP29311395A Expired - Fee Related JP3120029B2 (en) | 1995-11-10 | 1995-11-10 | Vacuum forming method |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP3120029B2 (en) |
Families Citing this family (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP4575746B2 (en) * | 2004-10-19 | 2010-11-04 | 株式会社イノアックコーポレーション | Airbag door and molding method thereof |
| JP4523955B2 (en) * | 2007-07-14 | 2010-08-11 | 関東自動車工業株式会社 | Vacuum forming machine for interior products |
| WO2009016725A1 (en) * | 2007-07-31 | 2009-02-05 | Toyota Shatai Kabushiki Kaisha | Automobile instrument panel and process for manufacturing the same |
| JP4973411B2 (en) * | 2007-09-14 | 2012-07-11 | トヨタ車体株式会社 | Instrument panel manufacturing method |
| FR3022176B1 (en) * | 2014-06-12 | 2017-01-20 | Visteon Global Tech Inc | THERMOFORMING MOLD DEVICE AND METHOD FOR MANUFACTURING THE SAME |
-
1995
- 1995-11-10 JP JP29311395A patent/JP3120029B2/en not_active Expired - Fee Related
Also Published As
| Publication number | Publication date |
|---|---|
| JPH09131785A (en) | 1997-05-20 |
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