JPS595020A - Method and apparatus for molding thermoplastic synthetic resin sheet classified into two colors or more - Google Patents

Method and apparatus for molding thermoplastic synthetic resin sheet classified into two colors or more

Info

Publication number
JPS595020A
JPS595020A JP11590882A JP11590882A JPS595020A JP S595020 A JPS595020 A JP S595020A JP 11590882 A JP11590882 A JP 11590882A JP 11590882 A JP11590882 A JP 11590882A JP S595020 A JPS595020 A JP S595020A
Authority
JP
Japan
Prior art keywords
sheet
vacuum forming
forming mold
support plate
vacuum
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
JP11590882A
Other languages
Japanese (ja)
Other versions
JPH0155090B2 (en
Inventor
Masaharu Yamada
正治 山田
Kentaro Harada
健太郎 原田
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Inoac Corp
Original Assignee
Inoue MTP KK
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 Inoue MTP KK filed Critical Inoue MTP KK
Priority to JP11590882A priority Critical patent/JPS595020A/en
Publication of JPS595020A publication Critical patent/JPS595020A/en
Publication of JPH0155090B2 publication Critical patent/JPH0155090B2/ja
Granted legal-status Critical Current

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
    • B29C51/26—Component parts, details or accessories; Auxiliary operations
    • 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
    • B29K2995/00—Properties of moulding materials, reinforcements, fillers, preformed parts or moulds
    • B29K2995/0018—Properties of moulding materials, reinforcements, fillers, preformed parts or moulds having particular optical properties, e.g. fluorescent or phosphorescent
    • B29K2995/002—Coloured
    • B29K2995/0021—Multi-coloured
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29L—INDEXING SCHEME ASSOCIATED WITH SUBCLASS B29C, RELATING TO PARTICULAR ARTICLES
    • B29L2031/00—Other particular articles
    • B29L2031/30—Vehicles, e.g. ships or aircraft, or body parts thereof
    • B29L2031/3005—Body finishings
    • B29L2031/3008—Instrument panels
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29L—INDEXING SCHEME ASSOCIATED WITH SUBCLASS B29C, RELATING TO PARTICULAR ARTICLES
    • B29L2031/00—Other particular articles
    • B29L2031/722—Decorative or ornamental articles

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Moulds For Moulding Plastics Or The Like (AREA)
  • Blow-Moulding Or Thermoforming Of Plastics Or The Like (AREA)

Abstract

PURPOSE:To prevent a defective from occurring owing to a displaced color boundary by heating and vacuum-forming a sheet as its color classification boundary portion is held and fixed by a push plate and a support plate. CONSTITUTION:First, a sheet 24 is held by a clamp 26, a support plate 42 is lifted to support the sheet 24 at its boundary portion B, a heating means is moved horizontally to heat and soften the sheet 24. Then, the heating means 28 is withdrawn, a push plate 52 is lowered to fix and hold the boundary portion B together with the support plate 42. Further, a vacuum-forming die 34 is lifted to withdraw the support plate 42 into the cavity 40 of the vacuum-forming die 34 and to take the boundary portion B into the cavity 40. The softened sheet 24 is vacuum-formed in this state and the vacuum-forming die 34 is lowered to take the completed vacuum-formed sheet 24 out of the die.

Description

【発明の詳細な説明】 この発明は、２色以上に色区分された熱可塑性合成樹脂
シートの成形方法及びその実施に使用する装置に関する
ものである。DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a method for molding a thermoplastic synthetic resin sheet divided into two or more colors, and an apparatus used for carrying out the method.

２色以上に色区分された熱可塑性合成樹脂シート（以下
本明細書中ではｒ色区分されたシー１−Ｊと称する）は
、例えば自動車のダツシュボードや運転席計器盤のパッ
ド表皮として、好適に使用されている。例えば、運転席
計器盤は、第１図に示すように、パッド上部（Ａ）の略
水平部分には、運転者の視覚を妨げないようまぶしくな
い色や。A thermoplastic synthetic resin sheet that is divided into two or more colors (hereinafter referred to as r-colored sheet 1-J) is suitable for use, for example, as a pad skin for an automobile's dash board or driver's seat instrument panel. It is used. For example, as shown in Figure 1, on the driver's seat instrument panel, the approximately horizontal part of the upper part of the pad (A) is painted with a non-dazzling color so as not to obstruct the driver's vision.

自動車の外観に調和した色が用いられ、またパッド下部
（Ｂ）の略垂直部分には運転室内の内装に調和する色が
用いられ、このように２色以上に区分されるパッド表皮
として前記色区分されたシートが使用される。このよう
に計器盤等のパッドのシートを２色以上に色区分する方
法としては、■パッド成形後２色に塗装する方法や、■
各色側に成形した後、各セグメントを融着して１体化す
る方法等が種々提案されているが、前者は使用塗料に制
限があったり、品質の安定性に問題がある等の欠点があ
り、また後者の方法ではトリミングロスが多く、特殊な
装置を必要とする等の欠点がある。A color that harmonizes with the exterior of the automobile is used, and a color that harmonizes with the interior of the driver's cabin is used for the substantially vertical portion of the lower part of the pad (B), and the pad skin, which is divided into two or more colors, is colored in the above-mentioned colors. Separated sheets are used. Methods of coloring pad sheets for instrument panels, etc. into two or more colors include: ■Painting in two colors after forming the pad;■
Various methods have been proposed, such as molding each color side and then fusing each segment to form a single body, but the former method has drawbacks such as restrictions on the paint used and problems with quality stability. However, the latter method has drawbacks such as a large amount of trimming loss and the need for special equipment.

そこで、予じめ２色以」二に色区分したシートを使用し
、これを真空成形型に被着して所望の形状に成形する方
法が広く採用されるに至っているが、この方法には以下
の問題点が残されている。例えば、第２図に示すように
上部Ａと下部Ｂとが２色に区分された計器盤等のパッド
１０では、当該色区分がなされる境界部（一般に「見切
り線」と称している）に第３図に示す如き空気吹出口１
２を設けて、これで境界のラインを隠すよう工夫がなさ
れている。しかし、このパッド１０を平面的に観察する
と、第４図に示すように大きく弧状に湾曲しており、こ
のため理想的には色区分境界部（Ｂ−Ｂ線）がＡ−Ａ線
で示す見切り線の範囲内に３− 人っていることが要求される（第４図（１））が、現実
には第４図の（２）及び（３）に示すように、境界部（
Ｂ−Ｂ線）は前記見切り線を逸脱して何れかに偏在し、
空気吹出口等による隠蔽が不能な不良品となることが多
い。Therefore, a method has become widely adopted in which a sheet is divided into two or more colors in advance, and the sheet is applied to a vacuum mold to form the desired shape. The following problems remain. For example, in a pad 10 such as an instrument panel in which the upper part A and the lower part B are divided into two colors as shown in FIG. Air outlet 1 as shown in Fig. 3
2 is provided to hide the border line. However, when this pad 10 is observed in a plan view, it is curved in a large arc shape as shown in FIG. It is required that there be 3 people within the range of the parting line (Figure 4 (1)), but in reality, as shown in Figure 4 (2) and (3), there are three people at the boundary (
B-B line) deviates from the parting line and is unevenly distributed somewhere,
This often results in defective products that cannot be hidden using air outlets, etc.

その理由を従来技術に係る色区分されたシートの成形方
法に関連して説明すると、従来の成形方法では、第５図
及び第６図に示すように予じめ２色に色区分されたシー
ト１４の両端を１対のクランプ１６で挾持して水平に保
持し、加熱装置１１８で該シート１４を加熱して軟化さ
せた後、下方に配置した流体圧シリンダ２０で真空成形
型２２を垂直に上昇させて、軟化したシートの真空成形
を行うようになっている。しかるに、前記加熱装置１８
で加熱されて軟化し、第６図に示す如く、弧状に反って
垂下するシート１４の色区分境界部（Ｂ−Ｂ線）は、同
じく第６図に平面的に示すシート１４の状態からも判明
するように、χ１−χ、、Ｌ−尤の範囲内において弓な
りに湾曲し、該色区分境界部をＡ−Ａ線の如く直線化す
ることは困難であ４− リ、従って真空成形後のシートには前述したような不良
品が発生することになる訳である。またパッドの形状如
何によっては真空成形型２２に凹凸部分が存在し、この
ため軟化したシート１４を該真空成形型２２に押当てて
真空成形を行うと、本来直線として形成されるべき色区
分境界部が蛇行状になってあられれることもある。The reason for this will be explained in relation to the conventional method of forming color-sorted sheets. In the conventional forming method, sheets are pre-sorted into two colors as shown in FIGS. 5 and 6. Both ends of the sheet 14 are held horizontally by a pair of clamps 16, and after the sheet 14 is heated and softened by a heating device 118, a vacuum forming mold 22 is vertically moved by a fluid pressure cylinder 20 disposed below. It is then lifted up to perform vacuum forming of the softened sheet. However, the heating device 18
The color division boundary (B-B line) of the sheet 14, which is heated and softened and hangs down in an arc shape as shown in FIG. As is clear, it is curved into an arch within the range of χ1-χ, , L-, and it is difficult to straighten the color division boundary part as shown by line A-A. Therefore, after vacuum forming, This results in the occurrence of defective products as described above. Also, depending on the shape of the pad, there may be uneven parts in the vacuum mold 22. Therefore, when the softened sheet 14 is pressed against the vacuum mold 22 and vacuum formed, the color division boundary, which should originally be formed as a straight line, may be formed. The parts may appear in a meandering shape.

本発明は、このような従来技術に係る色区分されたシー
トの成形方法に内在していた前記欠点を解決し、真空成
形時におけるシート色区分境界部のずれに起因する不良
品の発生を有効に抑制し、併せて生産コストの低減と安
定した量産化とを達成することを目的とする。The present invention solves the above-mentioned drawbacks inherent in the conventional color-coded sheet forming method, and effectively prevents the occurrence of defective products due to misalignment of sheet color-coded boundaries during vacuum forming. The purpose is to reduce the production cost and achieve stable mass production.

この目的を達成するため、本発明に係る２色以上に色区
分された熱可塑性合成樹脂シートの成形方法は、２色以
上に色区分された熱可塑性合成樹脂シートをクランプで
挾持することにより水平に保持し、前記シートの下方に
昇降自在に配置した真空成形型に形成した陥凹溝から出
入自在に昇降する支持板を上昇させて該シートの色区分
境界を前記クランプの挾持レベルにおいて支持し、前記
シート上方に加熱手段を到来させて該シートの加熱軟化
を行い、前記加熱手段を退去させた後前記シートの上方
にあって自在に昇降する押え板を下降させて該シートの
色区分境界部を前記支持板と共に挾持し、次いで前記真
空成形型の上昇を開始して前記支持台を相対的に真空成
形型に向けて後退させつつ前記軟化したシートに真空成
形型を接触させ、前記押え板と支持板とにより挾持され
たシートの色区分境界部を真空成形型の前記陥凹溝中に
取り込むと共に該真空成形型の上昇を続行して前記クラ
ンプの挾持レベル通過後は前記押え板を真空成形型と同
期的に上昇後退させ、更にこの間に真空成形型を真空吸
引して前記シートの真空成形を行うことを特徴とする。In order to achieve this objective, the method of molding a thermoplastic synthetic resin sheet divided into two or more colors according to the present invention is such that a thermoplastic synthetic resin sheet divided into two or more colors is held horizontally by clamps. A support plate that can be moved up and down from a recessed groove formed in a vacuum forming mold that is movably disposed below the sheet is raised to support the color classification boundary of the sheet at the clamping level of the clamp. , a heating means is brought above the sheet to heat and soften the sheet, and after the heating means is removed, a presser plate that is located above the sheet and can be freely raised and lowered is lowered to set the color classification boundary of the sheet. Then, the vacuum forming die is started to rise and the support base is relatively retreated toward the vacuum forming die, and the vacuum forming die is brought into contact with the softened sheet, and the vacuum forming die is brought into contact with the softened sheet. The color division boundary portion of the sheet held between the plate and the support plate is taken into the recessed groove of the vacuum forming mold, and the vacuum forming mold continues to rise, and after passing the clamping level of the clamp, the holding plate is removed. It is characterized in that it is raised and retreated synchronously with the vacuum forming mold, and further, during this period, the vacuum forming mold is vacuum-suctioned to perform vacuum forming of the sheet.

また、本発明に係る成形装置は、２色以上に色区分され
た熱可塑性合成樹脂シートを着脱自在に水平に挾持する
クランプと、前記クランプによるシート挾持レベルの上
方に進退自在に水平に到来する加熱手段と、前記クラン
プによるシート挾持レベルを越えて垂直に昇降し得るよ
う下方に配置した真空成形型と、前記真空成形型に形成
した陥凹溝から出入自在に昇降して前記シートの色区分
境界部をシート下面から支持する支持板と、前記シート
挾持レベルより上方において垂直昇降自在に配設され前
記シートの色区分境界部を前記支持板と共に該シート上
面から挾持する押え板とからなることを特徴とする。Further, the molding apparatus according to the present invention includes a clamp that horizontally clamps thermoplastic synthetic resin sheets divided into two or more colors in a removable manner; a heating means, a vacuum forming mold disposed below so as to be vertically movable beyond the level at which the sheet is held by the clamp, and a vacuum molding mold disposed vertically so as to be vertically movable above the level of holding the sheet by the clamp; consisting of a support plate that supports the boundary portion from the bottom surface of the sheet, and a presser plate that is vertically movable up and down above the sheet clamping level and that clamps the color classification boundary portion of the sheet together with the support plate from the top surface of the sheet. It is characterized by

次に、本発明に係る成形方法及びその装置につき、先ず
成形装置の好適な１実施例を添付図面を参照して説明し
、併せて該装置の作用及び効果に関連して本願発明に係
る成形方法の説明に及ぶこととする。Next, regarding the molding method and apparatus according to the present invention, first a preferred embodiment of the molding apparatus will be explained with reference to the attached drawings, and the operation and effects of the apparatus will also be explained. This will include an explanation of the method.

第７図は、本発明に係る色区分されたシートの成形装置
の概略構造を示す斜視図であって、参照符号２４は２色
に色区分された熱可塑性合成樹脂シートを示し、このシ
ート２４は所定の高さ位置に固定された１対のクランプ
２６．２６により両端部を着脱自在に挾持されて、水平
に保持されている。前記シート２４の材質としては、ポ
リエチ７− レン、ポリプロピレン、ポリスチレン、ポリカーボネー
ト、ＡＢＳ樹脂、ナイロン等の熱可塑性合成樹脂が、成
形目的に応じて適宜選択使用され、また必要に応じて可
塑剤、充填剤、安定剤等が添加されている。本実施例で
は該シート２４は２色に色区分されており、これは異な
る顔料で別々に着色された２枚のシートを加熱融着した
り、両シートを接着剤で接着したり、１枚のシートを色
分は塗装したりすることによって得られるが、このうち
２枚のシートを加熱融着することにより製造するのが好
ましい。FIG. 7 is a perspective view showing a schematic structure of a color-coded sheet molding apparatus according to the present invention, and reference numeral 24 indicates a thermoplastic synthetic resin sheet that is color-coded into two colors. is held horizontally by a pair of clamps 26, 26 fixed at a predetermined height, with both ends removably clamped. As the material of the sheet 24, thermoplastic synthetic resins such as polyethylene 7-lene, polypropylene, polystyrene, polycarbonate, ABS resin, and nylon are appropriately selected and used depending on the purpose of molding, and plasticizers and fillers are added as necessary. agents, stabilizers, etc. are added. In this embodiment, the sheet 24 is divided into two colors, and this can be done by heating and fusing two sheets colored separately with different pigments, by bonding both sheets with an adhesive, or by bonding them together with an adhesive. It can be obtained by painting the sheets in different colors, but it is preferable to manufacture them by heat-sealing two sheets.

前記クランプ２６．２６は夫々１対の上下に配設したバ
ーで構成され、例えば図示しない空気圧シリンダを動力
源とするトグル機構により開閉動作するようになってい
る。このクランプ２６．２６への色区分されたシート２
４の供給は、適宜の機構により自動的に行われるように
なっているが、゛手作業により１枚ずつ供給して挾持動
作させるようにしてもよい。なお、このクランプ２６．
２６によりシート２４を挾持して水平に保持したとき８
− のレベルを第８図に参照符号りで示す。The clamps 26, 26 each consist of a pair of upper and lower bars, and are opened and closed by a toggle mechanism powered by a pneumatic cylinder (not shown), for example. Color-coded sheet 2 to this clamp 26.26
Although the feeding of the sheets 4 is automatically performed by an appropriate mechanism, it is also possible to manually feed the sheets one by one and perform the clamping operation. Note that this clamp 26.
8 when the sheet 24 is held horizontally by the 26
- levels are shown with reference symbols in Figure 8.

前記のクランプ２６．２６によるシート挾持レベルＬの
上方には、シート２４を加熱して軟化させるための加熱
手段２８が水平走行自在に配設されている。この加熱手
段２８は、例えば第９図に示すように反射板３０とその
反射面内側に整列配置したシーズ線ヒータ３２とからな
り、図示しない水平なレール上を車軸を介して水平に走
行するよう構成されており、後述するように水平に保持
されたシート２４の上方に到来して、このシート２４を
所定温度にまで加熱軟化させた後、側方へ退出するよう
になっている。A heating means 28 for heating and softening the sheet 24 is disposed above the sheet clamping level L by the clamps 26, 26 so as to be horizontally movable. For example, as shown in FIG. 9, this heating means 28 is composed of a reflecting plate 30 and sheathed wire heaters 32 arranged in a line inside the reflecting surface, and is configured to run horizontally on a horizontal rail (not shown) via an axle. As will be described later, it arrives above a sheet 24 held horizontally, heats and softens the sheet 24 to a predetermined temperature, and then exits to the side.

次に、参照符号３４はクランプ２６．２６によるシート
２４の挾持レベルＬより下方に位置し、このシート挾持
レベルＬを越えて垂直昇降し得るよう配設した真空成形
型を示し、この真空成形型３４は、固定面に垂直に立設
した流体圧（殊に油圧）シリンダ３６のピストンロッド
３８先端に固定支持されて緩徐に昇降駆動される。真空
成形型３４の外部軸郭形状は、被成形物体の形状に応じ
て適宜設計されるが、後述するように色区分されたシー
ト２４ノ色区分境界線を外観的に目立たないよう見切る
ために、直線状の陥凹溝４ｏが凹設されていることが必
要である。この陥凹溝４ｏ中には、該陥凹溝の長手方向
幅一杯に延在する長形の支持板４２が出入自在に収納さ
れ、該支持板４２は、真空成形型３４内に垂直に配設し
た２本の流体圧（殊に油圧）シリンダ４４．４４のピス
トンロッド４６．４６先端に固定されて、自在に昇降し
得るなっている。なお、支持板４２の上昇限界は、少く
とも前記シート挾持レベル上以上に設定されており、後
述するように支持板４２はシート挾持レベルＬまで上昇
した後停止して、水平保持されたシート２４の色区分境
界部を支持するべく機能する。Next, reference numeral 34 designates a vacuum forming mold which is located below the clamping level L of the sheet 24 by the clamps 26 and 26 and is arranged to be able to move up and down vertically beyond this sheet clamping level L. 34 is fixedly supported at the tip of a piston rod 38 of a fluid pressure (particularly hydraulic) cylinder 36 vertically disposed on a fixed surface, and is slowly driven up and down. The external axial shape of the vacuum forming mold 34 is appropriately designed depending on the shape of the object to be molded, but as will be described later, in order to make the color division boundaries of the color-coded sheets 24 inconspicuous in appearance, , it is necessary that a linear recessed groove 4o is provided. An elongated support plate 42 extending over the entire width in the longitudinal direction of the recess groove 4o is housed in the recess groove 4o so as to be able to move in and out. It is fixed to the tips of piston rods 46, 46 of two fluid pressure (particularly hydraulic) cylinders 44, 44 provided, and can be moved up and down freely. The lifting limit of the support plate 42 is set at least above the sheet clamping level, and as will be described later, the support plate 42 stops after rising to the sheet clamping level L and lifts the sheet 24 held horizontally. Functions to support color segment boundaries.

更に、前記シート挾持レベルＬの上方でかつ前記支持板
４２の真上には、流体圧（殊に油圧）シリンダ４８のピ
ストンロッド５０に固定されて自在に垂直昇降する押え
板５２が配設されている。この押え板５２の下降限界は
、前記シート挾持レベルＬまでとなるよう設定され、後
述するように前記支持板４２により下方から支持された
シート２４を、該シート上面から色区分境界部において
押圧挾持するべく機能する。Further, above the sheet clamping level L and directly above the support plate 42, a presser plate 52 is provided which is fixed to a piston rod 50 of a fluid pressure (particularly hydraulic) cylinder 48 and is vertically movable. ing. The lowering limit of the presser plate 52 is set to the sheet clamping level L, and as will be described later, the sheet 24 supported from below by the support plate 42 is pressed and clamped from the upper surface of the sheet at the color division boundary. It functions as it should.

このように構成した本発明に係る色区分されたシートの
成形装置の作動順序及びこれに伴う作用、効果を、本発
明に係るシート成形方法との関係において、次に説明す
る。The operation sequence of the color-sorted sheet forming apparatus according to the present invention configured as described above, and the effects and effects thereof will be explained below in relation to the sheet forming method according to the present invention.

先ず、２色以上に色区分されかつ定寸法に裁断された熱
可塑性合成樹脂シート２４を、クランプ２６．２６で挾
持して水平に保持する（これによって前述したシート挾
持レベルＬが設定される）。このとき、真空成形型３４
及び押え板５２は夫々下降及び上昇限界位置にあり、ま
た支持板４２は真空成形型３４の陥凹溝４０中に後退し
ている。First, the thermoplastic synthetic resin sheet 24, which has been divided into two or more colors and cut into fixed sizes, is clamped and held horizontally by the clamps 26 and 26 (this sets the sheet clamping level L described above). . At this time, the vacuum forming mold 34
The holding plates 52 and 52 are at their lower and upper limit positions, respectively, and the support plate 42 is retracted into the recessed groove 40 of the vacuum mold 34.

そこで、第８図に示すようにシリンダ４４を付勢して支
持板４２を前記シート挾持レベルＬまで上昇させて該レ
ベルで停止させ、シート２４をその色区分境界部におい
て下方から支持する。なお、前記シリンダ４４はそのま
ま圧力付勢状態におか　１１− れ、従って前記支持板４２は重力により自然降下するこ
とはない。Therefore, as shown in FIG. 8, the cylinder 44 is energized to raise the support plate 42 to the sheet clamping level L and stop there, thereby supporting the sheet 24 from below at the color division boundary. Note that the cylinder 44 remains in the pressure-energized state, so the support plate 42 does not naturally descend due to gravity.

この状態において、前記加熱手段２８が水平に到来して
色区分されたシート２４の上方に位置し、該シート２４
の加熱を行ってこれを軟化させる（第９図参照）。この
ときシート、２４は色区分境界部Ｂにおいて支持板４２
によりシート挾持レベルＬに保持されているから、各ク
ランプ２６と支持板４２とにより支えられているシート
の中間部分は、図示のように弧状に湾曲垂下するが、色
区分境界部Ｂは平面的には直線状態で支持板４２に支持
されている。この場合の加熱手段２８によるシート熱可
塑化温度　は該シート２４の材質によっても異なるが、
一般に１２０乃至２００℃程度である。In this state, the heating means 28 comes horizontally and is located above the color-sorted sheet 24,
It is heated to soften it (see Figure 9). At this time, the sheet 24 is attached to the support plate 42 at the color division boundary B.
Since the sheet is held at the sheet clamping level L by the clamps 26 and the support plate 42, the intermediate portion of the sheet, which is supported by each clamp 26 and the support plate 42, hangs down in an arc shape as shown in the figure, but the color division boundary portion B is flat. is supported by a support plate 42 in a straight line. The temperature at which the sheet is thermoplasticized by the heating means 28 in this case varies depending on the material of the sheet 24;
Generally, the temperature is about 120 to 200°C.

このようにシート２４を加熱して熱可塑成形に適する程
度まで軟化させると、加熱手段２８は前記シート加熱位
置から退去する。次いで、前記シート挾持レベルＬの上
方でかつ支持板４２の真上に配設されているシリンダ４
８が付勢され、そのピストンロッド５０先端に固定した
押え板５２は１２− 下降限界であるシート挾持レベルＬまで下降して、シー
ト２４の下面に当接している支持板４２と共に該シート
の色区分境界部Ｂは、シート挾持レベルＬ上に確実に固
定保持されたことになる。Once the sheet 24 has been heated in this way to soften it to a degree suitable for thermoplastic molding, the heating means 28 is removed from the sheet heating position. Next, a cylinder 4 disposed above the sheet holding level L and directly above the support plate 42
8 is energized, and the presser plate 52 fixed to the tip of the piston rod 50 descends to the sheet clamping level L, which is the lowering limit, and the color of the sheet is lowered together with the support plate 42 that is in contact with the lower surface of the sheet 24. This means that the section boundary portion B is securely held fixed on the sheet clamping level L.

次いで、第１１図に示すようにシリンダ３６の付勢を開
始して真空成形型３４を緩徐に上昇させ、併せて該シリ
ンダ３６の付勢開始と同時に、支持板４２に接続してい
るシリンダ４４の流体圧付勢を解除すれば、真空成形型
３４の上昇に伴い支持板４２のピストンロッド４６は相
対的にシリンダ４４に後退する。このようにピストンロ
ッド４６は、真空成形型３４の上昇距離だけ相対的に後
退するものであるので、シート２４の色区分境界Ｂは、
押え板５２と前記支持板４２とにより依然シート挾持レ
ベルＬ上に保持されている。このように真空成形型３４
が垂直に上昇することによって、軟化したシート２４に
真空成形型３４は接触しく第１１図）、遂には真空成形
型３４がシート挾持レベルＬにまで到達すると、第１２
図に示すように支持板４２は真空成形型３４の陥凹溝４
０中に後退し、シート２４の色区分境界部Ｂは完全に前
記陥凹溝４０中に取り込まれてしまう。Next, as shown in FIG. 11, the cylinder 36 is started to be energized to slowly raise the vacuum mold 34, and at the same time as the cylinder 36 is started to be energized, the cylinder 44 connected to the support plate 42 is moved up. When the fluid pressure is released, the piston rod 46 of the support plate 42 retreats relatively to the cylinder 44 as the vacuum mold 34 rises. In this way, the piston rod 46 is relatively retracted by the lifting distance of the vacuum forming mold 34, so the color classification boundary B of the sheet 24 is
The sheet is still held on the sheet clamping level L by the press plate 52 and the support plate 42. In this way, the vacuum forming mold 34
As the vacuum forming die 34 rises vertically, the vacuum forming die 34 comes into contact with the softened sheet 24 (Fig. 11), and when the vacuum forming die 34 finally reaches the sheet clamping level L, the vacuum forming die 34 comes into contact with the softened sheet 24.
As shown in the figure, the support plate 42 is connected to the recessed groove 4 of the vacuum forming mold 34.
0, and the color division boundary portion B of the sheet 24 is completely taken into the recessed groove 40.

このように真空成形型３４（の陥凹溝４０）がシート挾
持レベルＬに到達し、このレベルを通過した後、押え板
５２に接続するシリンダ４８の流体圧第１３図に示すよ
うに押え板５２のピストンロッド５０はシリンダ４８中
に相対的に上昇後退する。すなわち、シート２４の色区
分境界部Ｂは、支持板４２及び押え板５２により挾持さ
れたまま、真空成形型３４と共に上昇し、従ってこの色
区分境界部Ｂは真空成形型３４の上昇につれて陥凹溝４
０中で湾曲したり、更には該陥凹溝４０からずれて逸脱
する如き不都合は完全に回避される。また真空成形型３
４は、例えば第１１図から第１３図に示す」二昇行程中
において真空吸引がなされ。In this way, after the vacuum forming mold 34 (the recessed groove 40 of the mold 34) reaches the sheet clamping level L and passes this level, the fluid pressure of the cylinder 48 connected to the presser plate 52 increases as shown in FIG. The piston rod 50 at 52 is relatively raised and retracted into the cylinder 48 . That is, the color division boundary B of the sheet 24 rises together with the vacuum mold 34 while being held by the support plate 42 and the presser plate 52, and therefore, the color division boundary B becomes depressed as the vacuum mold 34 rises. Groove 4
Inconveniences such as bending in the groove or even deviation from the recessed groove 40 are completely avoided. Also, vacuum molding mold 3
4, vacuum suction is performed during the second ascending stroke as shown in FIGS. 11 to 13, for example.

これによって真空成形型３４に当接する軟化シート２４
は好適に真空成形が行われる。そして、第１３図に示す
位置、すなわち真空成形型３４の下面が略シー１−挾持
レベルＬに整列したところで真空成形型３４の上昇及び
真空吸引を停止し、次いで真空成形型３４を降下させて
成形完了したシー１−２４を脱型する。なお、真空成形
完了時におけるシート２４の色区分境界部Ｂの見切り状
態を、第１３図におけるＰ部分の拡大図として第１４図
に示す。This causes the softened sheet 24 to come into contact with the vacuum mold 34.
Vacuum forming is preferably performed. Then, at the position shown in FIG. 13, that is, when the lower surface of the vacuum forming mold 34 is aligned with approximately Sea 1 - clamping level L, the lifting of the vacuum forming mold 34 and the vacuum suction are stopped, and then the vacuum forming mold 34 is lowered. The molded sea 1-24 is removed from the mold. The state of separation of the color division boundary portion B of the sheet 24 upon completion of vacuum forming is shown in FIG. 14 as an enlarged view of the P portion in FIG. 13.

このように、本発明に係る成形方法及びその装置によれ
ば、シートの色区分境界部は、シート挾持レベルに保持
された状態で加熱された後直ちに該レベルに固定保持さ
れ、そのまま真空成形が進行すると共に、最終的に押え
板と支持板とにより挾持された前記色区分境界部は真空
成形型の陥凹部中に取り込まれて成形が完了する。従っ
て、先に述べたように色区分境界部が弧状に湾曲、蛇行
等することがなく、常に直線状態を呈するよう成形され
るので、成形不良が発生することがなく、生産コストの
低減及び安定した量産を図ることができる等、多くの有
益な効果を奏する。As described above, according to the molding method and apparatus according to the present invention, the color division boundary portion of the sheet is heated while being held at the sheet clamping level, and then immediately fixed and held at that level, and vacuum forming is performed as it is. As the molding progresses, the color division boundary portion held between the presser plate and the support plate is finally taken into the recessed portion of the vacuum molding die, and the molding is completed. Therefore, as mentioned above, the color division boundaries are not curved or meandered in an arc shape, but are always straight, so molding defects do not occur, and production costs are reduced and stability is maintained. This has many beneficial effects, such as making it possible to achieve high-volume mass production.

【図面の簡単な説明】[Brief explanation of drawings]

第１図は２色以上に色区分されたシートを表皮とする自
動車の計器盤パッドを示す斜視図、第２＝１５− 図は２色に色区分されたパッドの斜視図、第３図は第２
図の■−■線断面図、第４図は第２図に示すパッドの平
面図であって、シートの色区分境界部の見切状態を夫々
（１）乃至（３）に示し、第５図は従来技術に係るシー
ト成形装置の概略説明図、第６図は第５図に示す装置に
よりシートを加熱した場合に、色区分境界部が湾曲変形
する状態を示す説明図であって、シートの側面及び平面
を合成したもの、第７図は本発明に係るシート成形装置
の概略構成を示す斜視図、第８図乃至第１３図は第７図
に示す成形装置の作動順序及び本発明に係る成形方法の
各工程を概略的に示す説明図、第１４図は第１３図に参
照符号Ｐで示す部分の拡大図である。 ｌＯ−ｍ−パッド　　　　　１２−ｍ−空気吹出口１４
−一一シ−ト　　　　　１６−−−クランプ１８−−−
加熱装置　　　　２０−−−シリンダ２２−ｍ−真空成
形型　　　２４−ｍ−シート２６−−−クランプ　　　
　２８−ｍ−加熱手段１６− ３０−ｍ−反射板　　　　　３２−−−シーズ線ヒータ
３４−ｍ−真空成形型　　　３６−−−シリンダ３８−
−−ピストンロッド ４０−−一陥凹溝　　　　　４２−ｍ−支持板４４−−
−シリンダ　　　　４６−−−ピストンロンド４８−−
−シリンダ　　　　５０−ｍ−ピストンロッド５２−−
−押え板 特許出願人　　　　井上エムチーピー株式会社ＦＩＧ、
１ 巳 ＦＩＧ、２ ＦＩＧ、３ ＦＩＧ、４ （１） （２） （３） ＦＩＧ、５ ＦＩＧ、６ ８ ＦＩＧ、８ ＦＩＧ、９ ＦＩＧ、１０ ＦＩＧ、１１Figure 1 is a perspective view showing an automobile instrument panel pad whose surface is a sheet that is divided into two or more colors, the second = 15- figure is a perspective view of a pad that is divided into two colors, and Figure 3 is a perspective view of a pad that is divided into two or more colors. Second
FIG. 4 is a plan view of the pad shown in FIG. 2, and (1) to (3) show the state of separation of the color division boundaries of the sheet, and FIG. 6 is a schematic explanatory diagram of a sheet forming apparatus according to the prior art, and FIG. 6 is an explanatory diagram showing a state in which the color division boundary portion is curved and deformed when the sheet is heated by the apparatus shown in FIG. 7 is a perspective view showing the schematic configuration of the sheet forming apparatus according to the present invention, and FIGS. 8 to 13 are a composite view of the side and plane surfaces, and FIGS. 8 to 13 are the operation order of the forming apparatus shown in FIG. FIG. 14 is an explanatory diagram schematically showing each step of the molding method, and FIG. 14 is an enlarged view of the portion indicated by reference numeral P in FIG. 13. lO-m-pad 12-m-air outlet 14
-11 Sheet 16---Clamp 18---
Heating device 20--Cylinder 22-m-Vacuum forming mold 24-m-Seat 26--Clamp
28-m-Heating means 16- 30-m-Reflector plate 32--Sheathed wire heater 34-m-Vacuum forming mold 36--Cylinder 38-
--Piston rod 40--Recessed groove 42-m-Support plate 44--
-Cylinder 46---Piston Rond 48---
-Cylinder 50-m-Piston rod 52--
- Presser plate patent applicant Inoue MCHIP Co., Ltd. FIG.
1 Snake FIG, 2 FIG, 3 FIG, 4 (1) (2) (3) FIG, 5 FIG, 6 8 FIG, 8 FIG, 9 FIG, 10 FIG, 11

Claims (2)

【特許請求の範囲】[Claims] （１）２色以上に色区分された熱可塑性合成樹脂シート
をクランプで挾持することにより水平に保持し、前記シ
ートの下方に昇降自在に配置した真空成形型に形成した
陥凹溝から出入自在に昇降する支持板を上昇させて該シ
ートの色区分境界を前記クランプの挾持レベルにおいて
支持し、前記シート上方に加熱手段を到来させて該シー
トの加熱軟化を行い、前記加熱手段を退去させた後前記
シートの上方にあって自在に昇降する押え板を下降させ
て該シートの色区分境界部を前記支持板と共に挾持し、
次いで前記真空成形型の上昇を開始して前記支持台を相
対的に真空成形型に向けて後退させつつ前記軟化したシ
ートに真空成形型を接触させ、前記押え板と支持板とに
より挾持されたシートの色区分境界部を真空成形型の前
記陥凹溝中に取り込むと共に該真空成形型の上昇を続行
して前記クランプの挾持レベル通過後は前記押え板を真
空成形型と同期的に上昇後退させ、更にこの間真空成形
型を真空吸引して前記シートの真空成形を行うことを特
徴とする、２色以上に色区分された熱可塑性合成樹脂シ
ートの成形方法。(1) A thermoplastic synthetic resin sheet divided into two or more colors is held horizontally by clamping it, and the sheet can be moved in and out through a recessed groove formed in a vacuum forming mold that is movable up and down below the sheet. A support plate that goes up and down is raised to support the color classification boundary of the sheet at the clamping level of the clamp, a heating means is brought above the sheet to heat and soften the sheet, and the heating means is removed. and then lowering a presser plate that is located above the sheet and that can be freely raised and lowered to clamp the color division boundary portion of the sheet together with the support plate;
Next, the vacuum forming mold starts to rise, and while the support base is relatively retreated toward the vacuum forming mold, the vacuum forming mold is brought into contact with the softened sheet, and the sheet is held between the presser plate and the support plate. The color division boundary part of the sheet is taken into the recessed groove of the vacuum forming mold, and the vacuum forming mold continues to rise, and after passing the clamping level of the clamp, the presser plate is raised and retreated synchronously with the vacuum forming mold. A method for molding a thermoplastic synthetic resin sheet divided into two or more colors, the method comprising: vacuum forming the sheet by applying vacuum suction to a vacuum forming mold during this period. （２）２色以上に色区分された熱可塑性合成樹脂シート
を着脱自在に水平に挾持するクランプと、前記クランプ
によるシート挾持レベルの上方に進退自在に水平に到来
する加熱手段と、前記クランプによるシート挾持レベル
を越えて垂直に昇降し得るよう下方に配置した真空成形
型と、前記真空成形型に形成した陥凹溝から出入自在に
昇降して前記シートの色区分境界部を下面から支持する
支持板と、前記シー１−挾持レベルより上方において垂
直昇降自在に配設され前記シートの色区分境界部を前記
支持板と共に該シー１〜上面から挾持する押え板とから
なる、２色以上の色区分された熱可塑性合成樹脂シート
の成形装置。(2) a clamp that horizontally clamps thermoplastic synthetic resin sheets divided into two or more colors; a heating means that horizontally extends above the level at which the sheet is clamped by the clamp; A vacuum forming mold is placed below so as to be vertically movable beyond the sheet clamping level, and the vacuum forming mold is movable up and down through a recessed groove formed in the vacuum forming mold to support the color division boundary portion of the sheet from the bottom surface. A support plate of two or more colors, comprising a support plate, and a holding plate that is vertically movable up and down above the sheet 1 clamping level and clamps the color classification boundary of the sheet together with the support plate from the top surface of the sheet 1. Molding equipment for color-coded thermoplastic synthetic resin sheets.
JP11590882A 1982-07-02 1982-07-02 Method and apparatus for molding thermoplastic synthetic resin sheet classified into two colors or more Granted JPS595020A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP11590882A JPS595020A (en) 1982-07-02 1982-07-02 Method and apparatus for molding thermoplastic synthetic resin sheet classified into two colors or more

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP11590882A JPS595020A (en) 1982-07-02 1982-07-02 Method and apparatus for molding thermoplastic synthetic resin sheet classified into two colors or more

Publications (2)

Publication Number Publication Date
JPS595020A true JPS595020A (en) 1984-01-11
JPH0155090B2 JPH0155090B2 (en) 1989-11-22

Family

ID=14674180

Family Applications (1)

Application Number Title Priority Date Filing Date
JP11590882A Granted JPS595020A (en) 1982-07-02 1982-07-02 Method and apparatus for molding thermoplastic synthetic resin sheet classified into two colors or more

Country Status (1)

Country Link
JP (1) JPS595020A (en)

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS60157827A (en) * 1983-12-16 1985-08-19 プラスティフォル・ゲーエムベーハー　ウント　カンパニー・カーゲー． Method and device for manufacturing lining article
JPS6260317U (en) * 1985-10-03 1987-04-14
EP0348357A2 (en) * 1988-06-24 1989-12-27 Polistock N.V. Method and apparatus for producing laminated panels
EP0384270A2 (en) * 1989-02-22 1990-08-29 Commer S.P.A. A die for the manufacture of lined panels, particulary for motor vehicle interiors
JPH02137230U (en) * 1989-04-19 1990-11-15
FR2904946A1 (en) * 2006-08-18 2008-02-22 Paraphe Sarl Multi-imprint thermoforming device, for forming decorative surface features on plastics plate, includes multi-imprint mold and plate retaining lower frame with additional supporting spars

Cited By (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS60157827A (en) * 1983-12-16 1985-08-19 プラスティフォル・ゲーエムベーハー　ウント　カンパニー・カーゲー． Method and device for manufacturing lining article
JPH0527533B2 (en) * 1983-12-16 1993-04-21 Purasuteifuoru Gmbh Unto Co Kg
JPS6260317U (en) * 1985-10-03 1987-04-14
JPH053300Y2 (en) * 1985-10-03 1993-01-27
EP0348357A2 (en) * 1988-06-24 1989-12-27 Polistock N.V. Method and apparatus for producing laminated panels
EP0348357A3 (en) * 1988-06-24 1992-04-22 Polistock N.V. Method and apparatus for producing laminated panels
EP0384270A2 (en) * 1989-02-22 1990-08-29 Commer S.P.A. A die for the manufacture of lined panels, particulary for motor vehicle interiors
JPH02137230U (en) * 1989-04-19 1990-11-15
FR2904946A1 (en) * 2006-08-18 2008-02-22 Paraphe Sarl Multi-imprint thermoforming device, for forming decorative surface features on plastics plate, includes multi-imprint mold and plate retaining lower frame with additional supporting spars

Also Published As

Publication number Publication date
JPH0155090B2 (en) 1989-11-22

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