JP2000084975A - Intermediate molded product and injection molding simultaneous decorating method utilizing the same - Google Patents
Intermediate molded product and injection molding simultaneous decorating method utilizing the sameInfo
- Publication number
- JP2000084975A JP2000084975A JP26104998A JP26104998A JP2000084975A JP 2000084975 A JP2000084975 A JP 2000084975A JP 26104998 A JP26104998 A JP 26104998A JP 26104998 A JP26104998 A JP 26104998A JP 2000084975 A JP2000084975 A JP 2000084975A
- Authority
- JP
- Japan
- Prior art keywords
- sheet
- molded product
- surplus
- intermediate molded
- base material
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
Landscapes
- Laminated Bodies (AREA)
- Processing And Handling Of Plastics And Other Materials For Molding In General (AREA)
- Injection Moulding Of Plastics Or The Like (AREA)
Abstract
Description
【0001】[0001]
【発明の属する技術分野】本発明は、シートを樹脂成形
物からなる基材に貼り合わせ一体化した成形品とする際
に、基材の周囲にはみ出したり、基材内部の中空窓部分
に残ったりした、余剰シートを容易に正確にトリミング
できる中間成形品と、この中間成形品を利用して余剰シ
ートの正確なトリミングがされた最終成形品を得る為の
射出成形同時絵付方法に関する。BACKGROUND OF THE INVENTION The present invention relates to a molded article formed by laminating a sheet on a substrate made of a resin molded product, and protruding around the substrate or remaining in a hollow window portion inside the substrate. The present invention relates to an intermediate molded product capable of easily and accurately trimming a surplus sheet, and a simultaneous injection molding painting method for obtaining a final molded product in which the excess sheet is accurately trimmed using the intermediate molded product.
【0002】[0002]
【従来の技術】従来より、射出成形同時絵付方法によっ
て、樹脂成形物からなる基材の表面に、装飾等が施され
たシートを積層して一体化した成形品が、自動車内装部
品等の各種用途で使用されている。この射出成形同時絵
付方法によって、シートを基材に積層する方法として
は、例えば、特公昭50−19132号公報、特公昭4
3−27488号公報等に記載されるように、シートを
射出成形の雌雄両型間に配置した後、溶融樹脂を型内に
射出充填し、樹脂成型物からなる基材の成形と同時にそ
の表面にシートを接着積層する方法である。2. Description of the Related Art Conventionally, a molded product obtained by laminating a sheet provided with a decoration or the like on the surface of a base material made of a resin molded product by an injection molding simultaneous painting method has been used for various types of automobile interior parts and the like. Used in applications. As a method of laminating a sheet on a base material by the simultaneous painting method of injection molding, for example, Japanese Patent Publication No. 50-19132 and Japanese Patent Publication No.
As described in Japanese Patent Application Laid-Open No. 3-27488, a sheet is arranged between both male and female molds of injection molding, and then a molten resin is injected and filled into the mold, and simultaneously with molding of a substrate made of a resin molded product, the surface thereof is formed. This is a method of bonding and laminating a sheet.
【0003】ところで、通常、シートは基材よりも大き
いシートを使用して、基材からはみ出た余剰シートはト
リミングして最終成形品としている。そこで、射出成形
同時絵付方法でも、射出成形後に別工程でトリミングす
る必要が無い方法として、図5に示す如く(特開昭60
−212314号公報等参照)、雌雄両型(型Ma及び
型Mb)の噛合部をトリミング用刃部43として、吸引
孔41による真空成形でシートSを真空成形した後、両
型を型締めする際にシートSを剪断する方法等が行われ
ている。しかし、このトリミング方法は、後工程が不要
の利点はあるものの、雌雄両型の噛み合わせが正確に行
われないと、トリミング用刃部を傷める為に、金型精度
及びその維持が必要であった。[0003] Usually, a sheet larger than the base material is used, and an excess sheet protruding from the base material is trimmed to obtain a final molded product. Therefore, in the simultaneous painting method for injection molding, there is no need to perform trimming in a separate process after injection molding, as shown in FIG.
After the sheet S is vacuum-formed by vacuum forming using the suction hole 41 with the engagement portion of the male and female molds (the mold Ma and the mold Mb) serving as the trimming blade portion 43, the molds are clamped. At this time, a method of shearing the sheet S or the like is performed. However, although this trimming method has the advantage of not requiring a post-process, if the engagement of the male and female molds is not performed accurately, the precision of the mold and its maintenance are required to damage the trimming blade. Was.
【0004】この点で、余剰シートを付けたままの中間
成形品を後工程でトリミングする事にはなるが、(A) カ
ッタ等で手作業で行う方法や、(B) NC(数値制御)ル
ータで行う方法、(C) 或いは打ち抜きプレスの様に押し
切る治具による方法も行われていた。しかし、(A) で
は、複雑な形状のものをトリミングするには時間がかか
り、トリミングコストが高かった。また、(B) では、物
品毎にトリミングすべき形状を装置にティーチングする
事が必要な為に初期設定が煩雑で、しかも装置も高価で
あった。また、(C) では、物品毎にプレス型を作る事が
必要であった。更に(B) や(C) では、(A) に比べ自動化
できる点で優れているが、中間成形品の形状が異なる毎
に、ティーチングやプレス型の変更が必要である。ま
た、この様に中間成形品形状毎に対応させる場合、より
正確にトリミングするには、中間成形品は成形直後では
熱を持ち、完全冷却後とは熱収縮によりサイズが微妙に
異なるので、成形後の経過時間に応じた熱収縮度合いを
考慮してトリミングする必要がある。しかし、中間成形
品のサイズ(トリミング位置及びその形状)は、サイク
ルタイム短縮、シートや成形樹脂の仕様変更による型温
変更、周囲作業環境温度変化等で、熱収縮度合いが変化
して微妙にずれる為、正確にはトリミングできない。At this point, the intermediate molded product with the surplus sheet attached is trimmed in a post-process. (A) A method of manually performing the operation with a cutter or the like, or (B) NC (numerical control) A method using a router, (C) or a method using a jig to cut off like a punching press was also used. However, in (A), it took time to trim a complicated shape, and the trimming cost was high. In (B), it is necessary to teach the shape to be trimmed for each article to the apparatus, so that the initial setting is complicated and the apparatus is expensive. In (C), it was necessary to make a press die for each article. Furthermore, (B) and (C) are superior to (A) in that they can be automated, but each time the shape of the intermediate molded product is different, teaching and press dies need to be changed. Also, in order to match each intermediate molded product shape in this way, in order to trim more accurately, the intermediate molded product has heat immediately after molding, and its size is slightly different from that after complete cooling due to heat shrinkage. It is necessary to perform trimming in consideration of the degree of heat shrinkage according to the elapsed time later. However, the size (trimming position and shape) of the intermediate molded product is slightly shifted due to a change in the degree of heat shrinkage due to a reduction in cycle time, a change in the mold temperature due to a change in the specification of the sheet or the molding resin, a change in the temperature of the surrounding work environment, and the like. Therefore, it cannot be trimmed accurately.
【0005】[0005]
【発明が解決しようとする課題】そこで、本発明者は、
本特許出願時は未だ未公開であるが特願平9−9792
3号として、図6の概念図で示す如く、中間成形品Wに
て、基材Bと該基材Bに積層された積層シート2とから
なる成形品本体4に対して、余剰シート1と成形品本体
4とを相対的に振動させて、余剰シート1と積層シート
2との連結部3に発生する応力集中による疲労破壊を利
用して、余剰シートを連結部3で切断してトリミングす
る方法を提案した。この方法によれば、図6の如く、余
剰シート1は連結部3から離れた部分を支持具11で支
持して振動させる為に、中間成形品形状の制約を受けな
い。従って、中間成形品形状毎に余剰シートをトリミン
グすべき形状が異なっても、毎回正確に且つ容易にトリ
ミングできる方法となる。Therefore, the present inventor has proposed:
At the time of filing this patent application, it has not been disclosed yet, but it is disclosed in Japanese Patent Application No. 9-9792.
As No. 3, as shown in the conceptual diagram of FIG. 6, in the intermediate molded product W, a surplus sheet 1 and a surplus sheet 1 are formed with respect to a molded product main body 4 including a base material B and a laminated sheet 2 laminated on the base material B. The surplus sheet is cut and trimmed at the connecting portion 3 by vibrating the molded article main body 4 relatively and utilizing the fatigue failure caused by stress concentration generated at the connecting portion 3 between the surplus sheet 1 and the laminated sheet 2. A method was proposed. According to this method, as shown in FIG. 6, since the surplus sheet 1 is vibrated while supporting the portion away from the connecting portion 3 with the support 11, the shape of the intermediate molded product is not restricted. Therefore, even if the shape of the surplus sheet to be trimmed differs depending on the shape of the intermediate molded product, the trimming method can be performed accurately and easily every time.
【0006】しかし、この振動によるトリミングでも、
具合が悪い事があった。例えば図7(A)の平面図で示
す様な最終成形品Pに対して、同図A−A線で切断した
時の断面図で示すその中間成形品Waが、図7(B)の
如く余剰シート1が、基材B上の積層シート2を真っ直
ぐに伸ばした延長線上に伸びている場合である。この様
な場合、これら両シートの連結部3での応力集中の度合
いが低く、切断までに時間を要す等とトリミングしにく
かった。すなわち、この場合は連結部3に於ける余剰シ
ート1と積層シート2との成す角度θが180度とな
る、余剰シート1と積層シート2とが平行関係にある場
合である。また、図7(C)及び(D)に概念的に示す
如く、振動によらずに、連結部3から少し離れた部分で
余剰シート1を挟持する支持具11で、余剰シートをそ
の張り出した面に垂直方向(図面では下方)に強制的に
変位させることでも、余剰シート1を押し切る様にして
トリミングできるが、この場合、中間成形品に於ける基
材Bの末端E1で切断せずに、支持具11の支持端E2
で切断する等、最終成形品Pに於いて余剰シートが少し
残り正確な位置でトリミングが出来なかった。[0006] However, even with this vibration trimming,
I was sick. For example, with respect to the final molded product P as shown in the plan view of FIG. 7A, an intermediate molded product Wa shown in a cross-sectional view taken along the line AA in FIG. This is a case where the surplus sheet 1 extends on an extension of the laminated sheet 2 on the base material B that is straightened. In such a case, the degree of stress concentration at the connecting portion 3 of these two sheets was low, and it was difficult to perform trimming because it took time to cut the sheet. That is, in this case, the angle θ formed between the surplus sheet 1 and the laminated sheet 2 in the connecting portion 3 is 180 degrees, and the surplus sheet 1 and the laminated sheet 2 are in a parallel relationship. Also, as shown conceptually in FIGS. 7C and 7D, the surplus sheet is extended by the support 11 that sandwiches the surplus sheet 1 at a portion slightly away from the connecting portion 3 without vibration. By forcibly displacing in the direction perpendicular to the surface (downward in the drawing), trimming can be performed by pushing off the surplus sheet 1, but in this case, cutting is performed without cutting at the end E1 of the base material B in the intermediate molded product. The support end E2 of the support 11
In the final molded product P, a surplus sheet was slightly left, and trimming could not be performed at an accurate position.
【0007】そこで、本発明の課題は、余剰シートが未
だ付いている中間成形品において、その元々の形状が異
なったり、或いは熱収縮によりその形状が変化したりし
て、余剰シートをトリミングすべき形状が異なっても、
容易に正確にトリミングできる中間成形品を提供する事
である。また本発明の課題は、この様な中間成形品を利
用して、余剰シートの正確なトリミングがされた最終成
形品が容易に得られる射出成形同時絵付方法を提供する
事である。[0007] Therefore, an object of the present invention is to trim an excess sheet in an intermediate molded product still having an excess sheet, because the original shape is different or the shape is changed by heat shrinkage. Even if the shape is different,
An object of the present invention is to provide an intermediate molded product that can be easily and accurately trimmed. Another object of the present invention is to provide a simultaneous injection molding and painting method in which a final molded product obtained by accurately trimming a surplus sheet using such an intermediate molded product can be easily obtained.
【0008】[0008]
【課題を解決するための手段】そこで上記課題を解決す
べく、本発明の中間成形品では、基材にシートが貼り合
わされ、且つ基材に積層されない部分のシートである余
剰シートが未だトリミングされていない状態の中間成形
品において、該余剰シートが、基材に積層されている部
分のシートである積層シートと、基材の末端で連結して
いる連結部において、余剰シートと積層シートとの成す
角度が180度以外の角度である構成とした。この様
に、余剰シートと積層シートとは連結部で折れた関係と
してあるので、連結部での応力集中がより多くなり、中
間成形品の基材の末端形状に沿って正確な位置で容易に
トリミング出来る事になる。In order to solve the above-mentioned problems, in the intermediate molded article of the present invention, a sheet is bonded to a base material, and a surplus sheet which is a part of the sheet not laminated on the base material is still trimmed. In the intermediate molded article in a state where the surplus sheet is not a surplus sheet, a laminated sheet that is a sheet of a portion laminated on the base material, and a surplus sheet and a lamination sheet at a connection portion connected at the end of the base material. The angle formed is an angle other than 180 degrees. In this way, since the surplus sheet and the laminated sheet are in a broken relationship at the connecting portion, the stress concentration at the connecting portion is increased, and it is easy to accurately position along the end shape of the base material of the intermediate molded product. You can trim it.
【0009】また、本発明の射出成形同時絵付方法は、
シートを一対の型の間に挿入した後、両型を型締めし、
両型で形成されるキャビティ内に流動状態の樹脂を充填
して、成形と同時に樹脂成形物からなる基材の表面にシ
ートを貼り合わせた後、両型を型開きし、上記中間成形
品を得て、次いで、該中間成形品の余剰シートをトリミ
ングして最終成形品とする様にした。この様に、上記中
間成形品を射出成形した後、トリミングするので、余剰
シートが正確な位置でトリミングがされた最終成形品が
容易に得られる。Further, the simultaneous injection molding painting method of the present invention
After inserting the sheet between a pair of molds, both molds are clamped,
After filling the resin in the flow state into the cavity formed by both molds and bonding the sheet to the surface of the substrate made of the resin molded product at the same time as the molding, the molds of both molds are opened, and the intermediate molded product is removed. Then, the surplus sheet of the intermediate molded product was trimmed to obtain a final molded product. As described above, since the intermediate molded product is trimmed after injection molding, a final molded product in which the surplus sheet is trimmed at an accurate position can be easily obtained.
【0010】[0010]
【発明の実施の形態】以下、図面を参照しながら本発明
の中間成形品及びそれを利用する射出成形同時絵付方法
について、実施の形態を説明する。DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, an embodiment of an intermediate molded product of the present invention and a simultaneous painting method for injection molding using the same will be described with reference to the drawings.
【0011】〔中間成形品〕先ず、図1は、本発明の中
間成形品Wを概念的に示す概念図である。図1(A)は
最終成形品Pの一例として内部に中空の窓部を有する成
形品の平面図であり、この様な最終成形品となる中間成
形品WをA−A線で切断した時の断面図が図1(B)で
ある。中間成形品Wは、図1(B)の如く、樹脂成形物
である基材BにシートSが貼り合わされた成形品であ
り、且つ基材に積層されない部分のシートである余剰シ
ート1が未だトリミングされていない状態の成形品であ
る。余剰シート1は基材Bに実際に積層された積層シー
ト2と連結部3で連結している。すなわち、余剰シート
1は積層シート2が基材Bの末端からはみ出した元は同
じシートSからなる部分である。そして、本発明の中間
成形品Wは、図1(B)にて余剰シート1と積層シート
2との連結部3の部分拡大図である図1(C)に示す如
く、この連結部3に於ける余剰シート1と積層シート2
との成す角度θが180度以外の角度となる様にしてあ
る。ちなみに、図1(C)の場合では角度θは約90度
である。[Intermediate Molded Article] FIG. 1 is a conceptual view conceptually showing an intermediate molded article W of the present invention. FIG. 1A is a plan view of a molded article having a hollow window therein as an example of the final molded article P, when the intermediate molded article W to be such a final molded article is cut along the line AA. Is a sectional view of FIG. As shown in FIG. 1B, the intermediate molded product W is a molded product in which the sheet S is bonded to the base material B which is a resin molded product, and the surplus sheet 1 which is a part of the sheet not laminated on the base material is still present. This is a molded product that has not been trimmed. The surplus sheet 1 is connected to the laminated sheet 2 actually laminated on the base material B by the connecting portion 3. That is, the surplus sheet 1 is a portion formed of the same sheet S from which the laminated sheet 2 protrudes from the end of the base material B. Then, as shown in FIG. 1C, which is a partially enlarged view of the connecting portion 3 between the surplus sheet 1 and the laminated sheet 2 in FIG. Sheet 1 and laminated sheet 2 in
Is an angle other than 180 degrees. Incidentally, in the case of FIG. 1C, the angle θ is about 90 degrees.
【0012】そして、この様な本発明の中間成形品に対
して、その余剰シートをトリミングするには、例えば既
に述べた振動を利用したり、或いは押し切る等の方法に
よれば良い。図1(C)の如く、連結部3から離れた余
剰シート1部分を支持具11で表裏から支持して、振動
或いは押し切る様にして、余剰シートに変位を与えれ
ば、連結部3は、角度θが180度の場合に比べて応力
集中の度合いが大きくなり、図1(D)の如く余剰シー
ト1は連結部3で切断する。支持具11による支持から
開放直後の余剰シート1の部分である支持端E2では、
余剰シートは折れ曲がっていないので、支持端E2での
応力集中の程度はより少なく、支持端E2では切断しな
い。そして、末端E1で正確に余剰シートがトリミング
され、基材Bの表面に積層シート2が積層し一体化した
最終成形品Pが得られる。In order to trim the surplus sheet of the intermediate molded product of the present invention as described above, for example, the vibration may be used or the method described above may be used. As shown in FIG. 1 (C), when the surplus sheet 1 that is separated from the connecting portion 3 is supported from the front and back by the support tool 11 and vibrated or pushed off to give a displacement to the surplus sheet, the connecting portion 3 becomes an angle. The degree of stress concentration is greater than when θ is 180 degrees, and the surplus sheet 1 is cut at the connecting portion 3 as shown in FIG. At the support end E2 which is a portion of the surplus sheet 1 immediately after being released from the support by the support tool 11,
Since the surplus sheet is not bent, the degree of stress concentration at the support end E2 is smaller, and the excess sheet is not cut at the support end E2. Then, the surplus sheet is accurately trimmed at the end E1, and the final molded product P in which the laminated sheet 2 is laminated on the surface of the base material B and integrated is obtained.
【0013】次に、図2を参照して、本発明の中間成形
品に於ける余剰シート1と積層シート2の連結部3での
角度関係を更に説明する。連結部での余剰シートと積層
シートとが成す角度θが180度以外である点に本発明
の特徴があるが、その角度θの取り得る角度を幾つか例
示する。図2(A)は、90°<角度θ<180°の一
例であり、図2(B)は、角度θ<90°の一例であ
り、図2(C)は角度θ=90°の例であり、図2
(D)は、角度θ>180°の一例である。これらは、
いずれも良好(OK)な結果が得られる場合である。こ
れらに対して図2(E)に、本発明の対象外の角度、つ
まり角度θ=180°で不良(NG)の場合を例示す
る。これらからも分かる様に、本発明では余剰シートは
積層シートとの連結部で折れ曲がった形状にしてある。
折れ曲がり無しが角度θ=180°であり、折れ曲がり
具合により角度θは各種値を取り得る。但し、折れ曲が
ると言っても、角度θが例えば170°等の様に180
°に近いと、効果が少ない。効果が大きく、より好まし
いのは例えば、図2(C)の如く角度θが90°、或い
は90°に近い角度の場合である。なお、これら角度θ
を所望の角度とするには、通常は余剰シートを挟み込む
雌雄両型のパーティング面の角度や形状を調整した型を
用いれば良い。基材末端からの伸びるパーティング面形
状が、そのまま余剰シート形状となる。Next, with reference to FIG. 2, the angular relationship at the connecting portion 3 between the surplus sheet 1 and the laminated sheet 2 in the intermediate molded product of the present invention will be further described. The feature of the present invention resides in that the angle θ formed between the surplus sheet and the laminated sheet at the connecting portion is other than 180 degrees, but some possible angles θ are exemplified. 2A is an example of 90 ° <angle θ <180 °, FIG. 2B is an example of angle θ <90 °, and FIG. 2C is an example of angle θ = 90 °. And FIG.
(D) is an example of the angle θ> 180 °. They are,
In each case, good (OK) results are obtained. On the other hand, FIG. 2E illustrates a case where the angle is out of the scope of the present invention, that is, the case where the angle θ = 180 ° is defective (NG). As can be seen from these figures, in the present invention, the surplus sheet is bent at the connection portion with the laminated sheet.
The angle θ = 180 ° when there is no bending, and the angle θ can take various values depending on the degree of bending. However, even if it is bent, the angle θ is 180 °, for example, 170 °.
When it is close to °, the effect is small. The effect is large and more preferable, for example, when the angle θ is 90 ° or an angle close to 90 ° as shown in FIG. Note that these angles θ
In order to obtain a desired angle, a mold in which the angles and shapes of the parting surfaces of the male and female molds that sandwich the surplus sheet are usually used may be used. The parting surface shape extending from the end of the base material becomes the surplus sheet shape as it is.
【0014】〔射出成形同時絵付方法〕そして、本発明
の射出成形同時絵付方法に於いては、成形工程にて上記
の様な中間成形品を成形して、次いでトリミング工程
で、その余剰シートをトリミングする方法であるが、余
剰シートをトリミングする方法としては、基本的には特
に限定は無い。但し、既に述べた、振動を利用する方法
は好ましい方法である。もちろん、既に述べた連結部か
ら少し離れた部分の余剰シートを支持して押し切る様に
する方法でも良い。次に、所謂射出成形同時絵付方法に
よる成形工程の説明の前に、トリミング工程に於けるト
リミング方法を説明する。[Injection Simultaneous Painting Method] In the simultaneous injection molding simultaneous painting method of the present invention, the above-mentioned intermediate molded article is molded in a molding step, and the surplus sheet is then trimmed in a trimming step. Although the trimming method is used, the method of trimming the surplus sheet is basically not particularly limited. However, the above-described method using vibration is a preferable method. Of course, a method may be used in which the surplus sheet slightly away from the connecting portion described above is supported and pushed off. Next, a trimming method in the trimming step will be described before describing a molding step by a so-called simultaneous injection molding painting method.
【0015】既に図6で概説した振動利用のトリミング
方法について更に説明する。この方法は、本発明者が特
願平9−97923号にて提案した方法である。すなわ
ち、図6(A)及び(B)は、そのトリミング方法の1
態様を示す概念図である。中間成形品Wに於いて、基材
Bの表面に積層シート2が積層された部分である成形品
本体4の周囲に、積層シートから延長した形で余剰シー
ト1がはみ出している。トリミングで切断すべき切断部
分は、基材Bから余剰シート1がはみ出す付け根の部分
であり、それは基材の末端部で積層シート2と余剰シー
ト1とが連結している連結部3(E1)である。そし
て、同図では、余剰シート1の先端近傍は、シートクラ
ンプ等の支持手段11で支持して、余剰シート1と成形
品本体4とを相対的に振動させる。図1の態様では振動
により、余剰シート1は該余剰シート1と直交する方向
に変位し、交互に図6(A)の状態や、図6(B)の状
態となる。図6(A)は余剰シート1に対して成形品本
体4が、図面下向き矢印方向に動いた状態である。一
方、図1(B)は余剰シート1に対して成形品本体4
が、図面上向き矢印方向に動いた状態である。振動は、
この様に切断部分とする連結部3の部分を、繰り返し折
れ曲がる様な方向の振動、即ち横波振動モードが好まし
い。その結果、連結部3には、繰り返し応力及び変形が
集中的に発生し、疲労破壊により、切断部分で成形品本
体4から余剰シート1を破断し、トリミングする事がで
きる。[0015] The trimming method using vibration already outlined in FIG. 6 will be further described. This method is a method proposed by the present inventors in Japanese Patent Application No. 9-97923. That is, FIGS. 6A and 6B show one of the trimming methods.
It is a conceptual diagram showing an aspect. In the intermediate molded product W, the surplus sheet 1 protrudes around the molded product main body 4 which is a portion where the laminated sheet 2 is laminated on the surface of the base material B in a form extended from the laminated sheet. The cut portion to be cut by trimming is a base portion where the surplus sheet 1 protrudes from the base material B, and is a connecting portion 3 (E1) where the laminated sheet 2 and the surplus sheet 1 are connected at the end of the base material. It is. In FIG. 1, the vicinity of the leading end of the surplus sheet 1 is supported by a support means 11 such as a sheet clamp, and the surplus sheet 1 and the molded article main body 4 are relatively vibrated. In the mode of FIG. 1, the surplus sheet 1 is displaced in a direction orthogonal to the surplus sheet 1 due to the vibration, and alternately becomes the state of FIG. 6A or the state of FIG. 6B. FIG. 6A shows a state in which the molded article main body 4 has moved in the direction of the downward arrow in the drawing with respect to the surplus sheet 1. On the other hand, FIG.
Is a state moved in the upward arrow direction in the drawing. The vibration is
The vibration in the direction in which the portion of the connecting portion 3 serving as the cut portion is repeatedly bent, that is, the shear wave vibration mode is preferable. As a result, repeated stress and deformation are intensively generated in the connecting portion 3, and the surplus sheet 1 can be broken and trimmed from the molded article main body 4 at the cut portion due to fatigue failure.
【0016】振動の与え方は、成形品本体は位置固定さ
れていても良く、位置固定されていなくても良い。要
は、余剰シートと成形品本体とが相対的に位置変化する
振動で有ればよい。従って、図6で言えば、例えば成
形品本体4は固定で余剰シートの支持手段11は上下振
動、成形品本体4は上下振動させ、余剰シートの支持
手段11は固定、成形品本体4と余剰シートの支持手
段11の両方は上下方向に逆位相で同時振動等である。
なお、振動モードとしては、図6の如く変位ベクトルが
余剰シートと直交する横波振動モードの他に、変位ベク
トルが余剰シート方向で成形品本体に向かって接近・離
脱する方向を向く縦波振動モード、或いは変位ベクトル
が基材/積層シートの積層界面に平行方向を向く捩振動
モードでも良い。振動数は、早い方が余剰シートを切断
し易いが特に制限はない。通常は、50回/s〜0.5
回/sの範囲で行う。Regarding the way of applying vibration, the molded article main body may be fixed in position, or may not be fixed in position. The point is that the vibration should be such that the surplus sheet and the molded article main body relatively change in position. Therefore, in FIG. 6, for example, the molded article main body 4 is fixed, the surplus sheet support means 11 vibrates up and down, and the molded article main body 4 vibrates up and down. Both of the sheet support means 11 are simultaneously vibrated in opposite phases in the vertical direction.
As the vibration mode, in addition to the transverse wave vibration mode in which the displacement vector is orthogonal to the surplus sheet as shown in FIG. 6, the longitudinal wave vibration mode in which the displacement vector is directed toward or away from the molded article body in the direction of the surplus sheet. Alternatively, a torsional vibration mode in which the displacement vector points in a direction parallel to the lamination interface between the base material and the lamination sheet may be used. The faster the frequency, the easier it is to cut the excess sheet, but there is no particular limitation. Usually, 50 times / s to 0.5
It is performed within the range of times / s.
【0017】また、余剰シート1を摘んで変位させる位
置は、切断部分とする連結部3から2〜50mm程度離
して挟持するのが望ましい。距離が近すぎても離れすぎ
ても、振動による応力集中及び変形を切断部分に集中発
生させにくい。成形品本体の周囲に突き出す余剰シート
は、その先端部分を長方形で額縁状のクランプ等の支持
手段で余剰シートを表裏から囲繞する様に挟持する。最
終成形品として中空窓部があり、その中間成形品に於い
て該窓部を覆う様に余剰シートが有る場合では、その余
剰シートは窓部の中央部分で支持手段で表裏から挟持す
る。そして、例えば、成形品本体の方を、固定した支持
手段に対して振動させれば、トリミングしたい部分に繰
り返し応力及び変形が集中発生し、中空窓部も含めてト
リミングできる。Further, it is desirable that the position where the surplus sheet 1 is pinched and displaced is separated by about 2 to 50 mm from the connecting portion 3 serving as a cutting portion and sandwiched. If the distance is too short or too far, stress concentration and deformation due to vibration hardly occur at the cut portion. The surplus sheet protruding around the molded article main body is clamped at its leading end by a rectangular frame-like supporting means such as a frame-shaped clamp so as to surround the surplus sheet from the front and back. In the case where there is a hollow window portion as the final molded product and there is an excess sheet to cover the window portion in the intermediate molded product, the excess sheet is sandwiched from the front and back by support means at the central portion of the window portion. Then, for example, if the molded article main body is vibrated with respect to the fixed support means, stress and deformation are repeatedly generated in a portion to be trimmed, and trimming can be performed including the hollow window portion.
【0018】図3は、上記振動を利用した或るトリミン
グ装置の一例の概念図(断面図)であり、この図を用い
て更に説明する。同図の中間成形品Wは、窓付きの成形
品である。そして、直方体の箱の上部開口面の全周に、
中間成形品Wの成形品本体4から周囲に突き出した余剰
シート1の全周囲を載せてクランプで挟んだ様な状態を
示す。そして、成形品本体4の周囲に突き出す余剰シー
ト1は、その先端部分を長方形で額縁状のクランプ等の
支持手段11で余剰シートを表裏から挟持して位置固定
する。また、中空窓部に該当する余剰シート1aは、そ
の余剰シート1aの中央部分で支持手段11aによって
表裏から挟持して支持して位置固定する。余剰シートの
クランプは磁力なども使える。一方、成形品本体4は表
側の積層シート2が傷付かない様に裏側から挟持する。
すなわち、スプリングの反発力よって押圧力が作用し、
対向して対を成す固定チャック12で、成形品本体裏面
凹部の両側面を図面左右方向に押圧して成形品本体を支
持する。この固定チャック12と該固定チャック12に
連結したアーム13とから成形品本体支持具14が構成
される。なお、同図で余剰シート1aの左側の部分の成
形品本体4の部分も同様にアーム13の先端に連結した
固定チャックで支持されるが、この部分の成形品本体は
紙面に対して垂直方向に長く、固定チャックの押圧方向
も紙面に対して垂直方向にしてある。成形品本体支持具
14のアーム13は、前記した箱の底面の孔を通じて、
励振装置15に連結している。励振装置15の振動源と
しては、ピエゾ(圧電)振動子、電歪振動子、流体圧シ
リンダー、或いは電動機の回転運動をカムやクランク・
ピストン機構等で往復運動に変換等したものを用いるこ
とができる。そして、成形品本体支持具14を励振装置
15で図面矢印方向に上下に振動させれば、成形品本体
4は上下に横波振動モードで振動する。その結果、トリ
ミングしたい部分に繰り返し応力及び変形が集中発生
し、中空窓部も含めてトリミングできる。なお、図示は
省略するが、励振装置15による励振を図3で左右方向
に行えば、成形品本体4の末端の連結部のうち、紙面に
平行な連結部部は捩振動で、また紙面に垂直な連結部は
縦波振動モードで振動させることが出来る。FIG. 3 is a conceptual diagram (cross-sectional view) of an example of a certain trimming device utilizing the above-mentioned vibration, and further explanation will be given with reference to this diagram. The intermediate molded product W in the figure is a molded product with a window. Then, on the entire circumference of the upper opening surface of the rectangular box,
This shows a state in which the entire periphery of the surplus sheet 1 protruding from the molded article main body 4 of the intermediate molded article W to the periphery is placed and clamped by a clamp. Then, the surplus sheet 1 protruding around the molded article body 4 is fixed in position by clamping the surplus sheet from the front and back with support means 11 such as a frame-shaped clamp at the leading end. Further, the surplus sheet 1a corresponding to the hollow window portion is supported and fixed at a central portion of the surplus sheet 1a from the front and back by the support means 11a. Magnetic force can be used to clamp the excess sheet. On the other hand, the molded article body 4 is sandwiched from the back side so that the laminated sheet 2 on the front side is not damaged.
In other words, the pressing force acts due to the repulsive force of the spring,
The opposite sides of the pair of fixed chucks 12 press both sides of the concave portion on the rear surface of the molded product main body in the left-right direction in the drawing to support the molded product main body. The fixed chuck 12 and the arm 13 connected to the fixed chuck 12 constitute a molded article main body support 14. In the same figure, the part of the molded article main body 4 on the left side of the surplus sheet 1a is also supported by the fixed chuck connected to the tip of the arm 13, but the molded article main body in this part is perpendicular to the paper surface. And the pressing direction of the fixed chuck is also perpendicular to the paper surface. The arm 13 of the molded article main body supporter 14 passes through a hole in the bottom surface of the box,
It is connected to the excitation device 15. The vibration source of the excitation device 15 is a piezo (piezoelectric) vibrator, an electrostrictive vibrator, a fluid pressure cylinder, or a cam, a crank, or the like.
What converted into reciprocating motion by a piston mechanism etc. can be used. Then, when the molded article main body supporter 14 is vibrated up and down by the excitation device 15 in the direction of the arrow in the drawing, the molded article main body 4 vibrates up and down in the transverse vibration mode. As a result, stress and deformation are repeatedly concentrated on the portion to be trimmed, and trimming can be performed including the hollow window portion. Although not shown, if the excitation by the excitation device 15 is performed in the left-right direction in FIG. 3, of the connection portions at the end of the molded article main body 4, the connection portion parallel to the paper surface is torsional vibration, and The vertical connection can be vibrated in a longitudinal vibration mode.
【0019】以上の説明からも分かる様に、振動利用の
トリミング方法によれば、たとえ成形品本体が熱収縮し
てトリミングサイズが変化したとしても(余剰シートの
支持手段11は切断部分とする連結部3からある程度離
れた位置を挟持することになるので)、何の変更も無く
(支持手段の位置変更の必要はない)そのままで対応す
ることができる上、連結部で正確にトリミングできる事
になる。As can be seen from the above description, according to the trimming method using vibration, even if the trimming size changes due to the thermal contraction of the molded article main body (the surplus sheet supporting means 11 is connected to the cut portion as a cut portion). (Because a position distant to some extent from the part 3 will be clamped), it is possible to respond without any change (no need to change the position of the support means), and it is possible to accurately trim at the connecting part. Become.
【0020】そして、本発明の射出成形同時絵付方法に
於ける成形工程では、以上の様な本発明の中間成形品
は、次の様にして成形すれば良い。すなわち、中間成形
品の成形は、従来公知の所謂射出成形同時絵付方法によ
れば良い。但し、この際、余剰シートと積層シートとが
その連結部で成す角度は180度以外の角度となる様
な、成形品形状、金型パーティング面形状としておく。
所謂射出成形同時絵付方法とは、特公昭50−1913
2号公報、特公昭43−27488号公報等に記載され
るように、シートを射出成形の雌雄両型間に配置した
後、型を真空成形型として真空成形した後、流動状態の
樹脂を型内に射出充填し、樹脂成型物からなる基材の成
形と同時に、基材の表面にシートを積層する方法であ
る。なお、シートの絞りが浅い場合は、シートの真空成
形は省略しても良く、またシートの予熱を省略する形態
も有る。そこで、次に図4の概念図によって、中間成形
品の成形工程部分を、その或る一形態で説明しておく。In the molding step in the simultaneous painting method for injection molding of the present invention, the intermediate molded product of the present invention as described above may be molded as follows. That is, the molding of the intermediate molded article may be performed by a conventionally known so-called simultaneous injection molding painting method. However, at this time, the shape of the molded product and the shape of the mold parting surface are such that the angle formed by the connection portion between the surplus sheet and the laminated sheet is an angle other than 180 degrees.
The so-called simultaneous injection molding painting method is described in Japanese Patent Publication No. 50-1913.
No. 2, JP-B-43-27488, etc., after the sheet is placed between the male and female molds for injection molding, the mold is vacuum-molded as a vacuum mold, and the resin in a fluid state is molded. This is a method in which a sheet is laminated on the surface of the base material at the same time as the base material made of a resin molded product is molded by injection filling the inside. In the case where the drawing of the sheet is shallow, the vacuum forming of the sheet may be omitted, and there is also a form in which the preheating of the sheet is omitted. Therefore, the molding process of the intermediate molded product will be described in a certain form with reference to the conceptual diagram of FIG.
【0021】先ず、図4(A)の如く、射出成形型とし
ては、射出ノズルと連通する湯道(ランナー)及び湯口
(ゲート)を有する型Maと、型面に吸引孔41を有し
シートの予備成形型を兼用する型Mbの一対の成形型を
用いる。これらの型は鉄等の金属、或いはセラミックス
からなる。型開き状態に於いて両型Ma、Mb間にシー
トSを供給し、型MbにシートSを枠状のシートクラン
プ42で押圧する等して固定する。この際、シートSの
裏側となる側は、図面右側の射出樹脂側となる様にする
事はもちろんである。次いで、適宜、両型間に挿入した
ヒータでシートSを加熱軟化させる。加熱は例えば非接
触の輻射加熱とするが、接触加熱でも良い。そして、吸
引孔から吸引して真空成形して、シートSを型Mbのキ
ャビティ面に沿わせ予備成形する。なお、真空成形は圧
空も併用する真空圧空成形でも良く、これも包含する。
次いで、ヒータを両型間から退避させ、図4(B)の如
く両型を型締めし、両型で形成さるキャビティに加熱熔
融状態等の流動状態の樹脂を充填する。そして、樹脂が
冷却等によって固化後、型開きして、中間成形品を取り
出すというものである。First, as shown in FIG. 4A, as an injection mold, a mold Ma having a runner (runner) and a gate (gate) communicating with the injection nozzle, and a sheet having a suction hole 41 on the mold surface. And a pair of molds of the mold Mb also serving as the preliminary mold. These molds are made of metal such as iron or ceramics. In the mold open state, the sheet S is supplied between the two molds Ma and Mb, and the sheet S is fixed to the mold Mb by pressing with a frame-shaped sheet clamp 42 or the like. At this time, the back side of the sheet S is, of course, the injection resin side on the right side of the drawing. Next, the sheet S is appropriately heated and softened by a heater inserted between the two dies. The heating is, for example, non-contact radiation heating, but may be contact heating. Then, the sheet S is sucked from the suction hole and vacuum formed, and the sheet S is preformed along the cavity surface of the mold Mb. In addition, vacuum forming may be vacuum press forming using both pressure and air, and this is also included.
Next, the heater is retracted from between the two dies, the two dies are clamped as shown in FIG. 4B, and a cavity formed by the two dies is filled with a resin in a flowing state such as a heated and molten state. Then, after the resin is solidified by cooling or the like, the mold is opened and the intermediate molded product is taken out.
【0022】〔使用するシート〕余剰シート及び積層シ
ートとして使用されるシートとしては、基材の表面保護
用のシート単層のみ、或いはシートに装飾処理が施され
た装飾シートを挙げることができる。シートとしては、
代表的には樹脂シートが挙げられる。樹脂シートの樹脂
としては、例えば、ポリ塩化ビニル、ポリ塩化ビニリデ
ン、酢酸ビニル−塩化ビニル共重合体、ポリビニルブチ
ラール等のビニル重合体、ポリスチレン、アクリル−ス
チレン共重合体、ABS(アクリロニトリル−ブタジエ
ン−スチレン共重合体)樹脂等のスチレン系樹脂、PM
MA(ポリメタクリル酸メチル)、ポリメタクリル酸エ
チル、ポリアクリロニトリル等のアクリル系樹脂、ナイ
ロン6、ナイロン66等のポリアミド樹脂、ポリエチレ
ン、ポリプロピレン、ポリメチルペンテン、オレフィン
系熱可塑性エラストマー等のポリオレフィン系樹脂、酢
酸セルロース、ニトロセルロース等のセルロース系樹
脂、ポリエチレンテレフタレート、ポリブチレンテレフ
タレート、エチレンテレフタレート−イソフタレート共
重合体、ポリアリレート等のポリエステル系樹脂、ブタ
ジエンゴム、クロロプレンゴム、シリコーンゴム等のゴ
ム系樹脂、ポリフッ化ビニリデン、ポリフッ化ビニル等
のフッ素樹脂、ウレタン系熱可塑性エラストマー、オレ
フィン系熱可塑性エラストマー等の熱可塑性エラストマ
ー、ポリカーボネート等である。基材シートはこれら樹
脂の単層体又は複層からなる成形品本体である。これら
樹脂のなかでも、特に振動利用のトリミングによる場合
は、ゴム系樹脂や熱可塑性エラストマーはその物性上、
切断しにくい。また、PMMA等のアクリル系樹脂、ポ
リカーボネート、ポリスチレン等はその物性上、切断し
易い。なお、シートとしては、樹脂シートの他に、紙、
織布、不織布、金属シート等でも良く、これらと樹脂シ
ートの成形品本体でも良い。[Sheet to be used] Examples of the surplus sheet and the sheet used as the laminated sheet include a single layer of a sheet for protecting the surface of the base material or a decorative sheet in which the sheet is subjected to a decoration treatment. As a sheet,
A typical example is a resin sheet. Examples of the resin for the resin sheet include polyvinyl chloride, polyvinylidene chloride, vinyl acetate-vinyl chloride copolymer, vinyl polymers such as polyvinyl butyral, polystyrene, acryl-styrene copolymer, ABS (acrylonitrile-butadiene-styrene). Styrene resin such as copolymer) resin, PM
Acrylic resins such as MA (polymethyl methacrylate), polyethyl methacrylate, and polyacrylonitrile; polyamide resins such as nylon 6 and nylon 66; polyolefin resins such as polyethylene, polypropylene, polymethylpentene, and olefin thermoplastic elastomers; Cellulose resins such as cellulose acetate and nitrocellulose, polyester resins such as polyethylene terephthalate, polybutylene terephthalate, ethylene terephthalate-isophthalate copolymer, polyarylate, rubber resins such as butadiene rubber, chloroprene rubber, silicone rubber, and polyolefin. Fluororesins such as vinylidene fluoride and polyvinyl fluoride, thermoplastic elastomers such as urethane-based thermoplastic elastomers and olefin-based thermoplastic elastomers, and polycarbonate And the like. The base sheet is a molded article body composed of a single layer or a plurality of layers of these resins. Among these resins, especially when trimming using vibration, rubber-based resins and thermoplastic elastomers are
Hard to cut. Further, acrylic resins such as PMMA, polycarbonate, polystyrene and the like are easily cut due to their physical properties. In addition to the resin sheet, paper, paper,
It may be a woven fabric, a nonwoven fabric, a metal sheet, or the like, or a molded body of these and a resin sheet.
【0023】そして、シートは、通常は上記シートに従
来公知の装飾処理等が適宜施されたものであるが、上記
シート単体のこともある。次に、樹脂からなる上記シー
トに施される装飾処理としては、着色剤の練込みによ
るシート自身の着色、或いは絵柄や金属薄膜層からな
る装飾層の形成、凹凸模様形成等がある。The sheet is usually the above-mentioned sheet which is appropriately subjected to a conventionally known decoration treatment or the like, but may be the above-mentioned sheet alone. Next, as the decoration treatment applied to the resin sheet, there is coloring of the sheet itself by kneading a coloring agent, formation of a decoration layer composed of a pattern or a metal thin film layer, formation of an uneven pattern, and the like.
【0024】着色剤の練込みによるシート自身の着色
では、シートを着色透明又は着色不透明、或いは無色不
透明又は着色不透明等とする装飾処理が施される。着色
剤としては、チタン白、カーボンブラック、群青、弁
柄、黄鉛等の無機顔料、キナクリドン、イソインドリノ
ン、フタロシアニンブルー、アニリンブラック等の有機
顔料乃至は染料等が用いられる。In the coloring of the sheet itself by kneading the coloring agent, the sheet is subjected to a decoration treatment for making the sheet transparent or colored or opaque, or colorless or opaque. Examples of the coloring agent include inorganic pigments such as titanium white, carbon black, ultramarine, red iron oxide, and graphite; and organic pigments or dyes such as quinacridone, isoindolinone, phthalocyanine blue, and aniline black.
【0025】装飾層の形成では、通常は、バインダー
に着色剤等を添加した印刷インキを用いて、グラビア印
刷等の公知の印刷法で装飾層を形成する。なお、装飾層
が全面ベタ柄の場合には、塗液を用いたロールコート等
の公知の塗工法でも良い。印刷インキ(或いは塗料)の
バインダーの樹脂としては、アクリル樹脂、塩化ビニル
−酢酸ビニル共重合体、ポリエステル樹脂、ウレタン樹
脂、塩素化ポリオレフィン等を単体、或いは2種以上混
合使用する。着色剤は前記シート自体の着色で列記の着
色剤等を用いる。装飾層の絵柄は、木目、石目、布目、
砂目、幾何学模様、文字、全面ベタ等である。なお、装
飾層が金属薄膜層の場合は、アルミニウム、クロム等の
真空蒸着法、スパッタリング法等で形成する。金属薄膜
層は全面又は部分的(絵柄状等)な層とする。In the formation of the decorative layer, usually, the decorative layer is formed by a known printing method such as gravure printing using a printing ink obtained by adding a coloring agent or the like to a binder. When the decorative layer has a solid pattern on the entire surface, a known coating method such as roll coating using a coating liquid may be used. Acrylic resin, vinyl chloride-vinyl acetate copolymer, polyester resin, urethane resin, chlorinated polyolefin, or the like may be used alone or as a mixture of two or more as the binder resin of the printing ink (or paint). As the coloring agent, the coloring agents listed in the sheet coloration are used. The pattern of the decoration layer is wood grain, stone grain, cloth grain,
Grains, geometric patterns, letters, solid colors, etc. When the decorative layer is a metal thin film layer, it is formed by a vacuum evaporation method of aluminum, chromium, or the like, a sputtering method, or the like. The metal thin film layer is an entire surface or a partial (pattern or the like) layer.
【0026】凹凸模様形成は、ヘアライン加工、サン
ドブラスト加工、エンボス加工等により、樹脂製のシー
ト等の表面に凹凸模様を形成する。凹凸模様は、ヘアラ
イン、砂目、梨地、木目導管溝等である。In forming the concavo-convex pattern, a concavo-convex pattern is formed on the surface of a resin sheet or the like by hairline processing, sandblasting, embossing, or the like. The concavo-convex pattern is a hairline, a grain of sand, a satin finish, a wood grain conduit groove, or the like.
【0027】また、シートの裏面には、基材との接着性
向上のため、コロナ放電処理、公知の各種プライマー塗
工等の易接着処理、接着剤層が適宜施されたものが使用
される。接着剤層には、熱可塑性樹脂、或いは熱硬化性
樹脂等が用いられる。例えば、熱可塑性樹脂では、ポリ
スチレン、ポリα−メチルスチレン等のスチレン樹脂又
はスチレン共重合体、ポリ(メタ)アクリル酸メチル、
ポリ(メタ)アクリル酸エチル、ポリ(メタ)アクリル
酸ブチル等のアクリル樹脂、塩素化ポリプロピレン等の
オレフィン塩素化ポリオレフィン樹脂、塩化ビニル樹
脂、酢酸ビニル樹脂、塩化ビニル−酢酸ビニル共重合
体、ポリビニルブチラール等のビニル重合体、ポリイソ
プレンゴム、ポリイソブチルゴム、スチレンブタジエン
ゴム、ブタジエンアクリロニトリルゴム等のゴム系樹
脂、ポリアミド樹脂等の熱可塑性樹脂等の1種又は2種
以上の混合物が用いられる。Further, on the back surface of the sheet, a material which has been appropriately subjected to a corona discharge treatment, an easy adhesion treatment such as various known primer coatings, and an adhesive layer in order to improve the adhesion to the substrate is used. . For the adhesive layer, a thermoplastic resin or a thermosetting resin is used. For example, in a thermoplastic resin, polystyrene, a styrene resin such as poly α-methylstyrene or a styrene copolymer, poly (meth) acrylate,
Acrylic resins such as poly (ethyl meth) acrylate and poly (butyl methacrylate), olefin chlorinated polyolefin resins such as chlorinated polypropylene, vinyl chloride resin, vinyl acetate resin, vinyl chloride-vinyl acetate copolymer, polyvinyl butyral One or a mixture of two or more kinds of vinyl polymers such as polyisoprene rubber, polyisobutyl rubber, rubber resins such as styrene butadiene rubber, butadiene acrylonitrile rubber, and thermoplastic resins such as polyamide resin are used.
【0028】〔基材〕基材となる射出樹脂は特に制限は
無く、射出成形同時加飾方法に於ける従来公知のものが
使用できる。例えば、熱可塑性樹脂であれば、ABS
(アクリロニトリル−ブタジエン−スチレン共重合体)
樹脂、スチレン樹脂、塩化ビニル樹脂、アクリル樹脂、
ポリカーボネート樹脂、或いはポリエチレン、ポリプロ
ピレン、ポリブテン、ポリメチルペンテン、エチレン−
プロピレン共重合体、エチレン−プロピレン−ブテン共
重合体、オレフィン系熱可塑性エラストマー等のポリオ
レフィン系樹脂等である。また、硬化性樹脂であれば、
2液硬化型の樹脂、例えば、ウレタン樹脂、不飽和ポリ
エステル樹脂、エポキシ樹脂等の未硬化樹脂液等の射出
成形同時加飾用として従来より知られている材料を使用
できる。熱可塑性樹脂は加熱熔融して流動状態で射出
し、また硬化性樹脂は室温又は適宜加熱して流動状態で
射出する。[Substrate] The injection resin serving as the substrate is not particularly limited, and those conventionally known in the simultaneous injection molding and decorating method can be used. For example, if it is a thermoplastic resin, ABS
(Acrylonitrile-butadiene-styrene copolymer)
Resin, styrene resin, vinyl chloride resin, acrylic resin,
Polycarbonate resin, or polyethylene, polypropylene, polybutene, polymethylpentene, ethylene-
Polyolefin resins such as propylene copolymers, ethylene-propylene-butene copolymers, and olefin-based thermoplastic elastomers. Also, if it is a curable resin,
A conventionally known material for simultaneous injection molding and decoration of an uncured resin liquid such as a two-liquid curable resin, for example, a urethane resin, an unsaturated polyester resin, or an epoxy resin can be used. The thermoplastic resin is melted by heating and injected in a fluid state, and the curable resin is injected at room temperature or appropriately heated and flowed.
【0029】[0029]
【実施例】以下、実施例及び比較例により本発明を更に
詳述する。The present invention will be described in more detail with reference to the following Examples and Comparative Examples.
【0030】〔実施例〕シートとしては、PMMA系の
厚さ125μmのアクリル樹脂シートの裏側となる面
に、絵柄を表す装飾層と、接着剤層とをグラビア印刷で
形成した装飾シートを用意した。そして、射出成形型と
しては、中間成形品に於いて余剰シートと積層シートと
がその連結部で成す角度が略90度となる様に、最終成
形品では積層シートが基材の全周囲の側面にまで若干回
り込む様な形状の型を用意した。この最終成形品は、自
動車内装用のパネルで、幅180mm、天地250mm
の略長方形の略箱型形状である。また、余剰シートは、
雌雄両型の平面のパーティング面で、連結部から直線状
に基材末端の外周囲に伸びた形状とした。[Example] As a sheet, a decorative sheet having a decorative layer representing a picture and an adhesive layer formed by gravure printing on the surface on the back side of a PMMA-based acrylic resin sheet having a thickness of 125 μm was prepared. . In the injection molding die, in the final molded product, the laminated sheet is formed so that the angle between the surplus sheet and the laminated sheet in the intermediate molded product is approximately 90 degrees at the connecting portion thereof. A mold with a shape that slightly wraps around was prepared. This final molded product is a panel for automobile interior, width 180mm, top and bottom 250mm
Of a substantially rectangular shape. The surplus sheet is
Both male and female flat parting surfaces were formed to extend linearly from the connecting portion to the outer periphery of the base material end.
【0031】そして、上記シートを用いた通常の射出成
形同時絵付方法によって、中間成形品を作製した。その
方法は、図4で示した如く、シートSを雌雄両型間に挿
入し、型間に進入させた熱盤でシートを加熱軟化して真
空成形型(雌型)で真空成形により予備成形して、次い
熱盤を型外部に退避させて両型を型締めして、キャビテ
ィ内に加熱で熔融し流動状態となった樹脂を射出充填
し、成形と同時に樹脂成形物からなる基材の表面にシー
トを積層して、中間成形品とした。なお、射出樹脂はA
S樹脂(アクリロニトリル−スチレン共重合体)を用
い、キャビティへの樹脂注入は、コールドスラッグの防
止の為、サブマリンゲートによった。Then, an intermediate molded product was produced by the usual simultaneous injection molding and painting method using the above sheet. In this method, as shown in FIG. 4, the sheet S is inserted between the male and female molds, the sheet is heated and softened with a hot plate inserted between the molds, and preformed by vacuum forming with a vacuum forming mold (female mold). Then, the hot platen is retracted to the outside of the mold, both molds are clamped, and the cavity is filled with resin that has been heated and melted by heating. The sheet was laminated on the surface of to obtain an intermediate molded product. The injection resin is A
S resin (acrylonitrile-styrene copolymer) was used, and the resin was injected into the cavity by a submarine gate to prevent cold slug.
【0032】そして、トリミング装置で余剰シートをト
リミングした。トリミングは、張り出した余剰シート
を、基材の末端から少し離れた位置(約10mm)で表
裏から挟んだ上で、基材と余剰シートとをシート面に垂
直方向にずらして、図1(D)の様に押し切る方法によ
った。その結果、図1(D)の如く、基材Bの末端E1
である積層シートと余剰シートとの連結部で、余剰シー
ト1を切断でき、望み通りの場所で正確にトリミングで
きた。Then, the surplus sheet was trimmed by a trimming device. Trimming is performed by sandwiching the overhanging surplus sheet from the front and back at a position (about 10 mm) slightly away from the end of the base material, and shifting the base material and the surplus sheet in a direction perpendicular to the sheet surface. ). As a result, as shown in FIG.
The surplus sheet 1 could be cut at the connection between the laminated sheet and the surplus sheet, and the trimming could be accurately performed at a desired place.
【0033】〔比較例〕実施例に対して、射出成形型
を、中間成形品に於いて余剰シートと積層シートとがそ
の連結部の成す角度が略180度となる様な、基材表面
上の積層シートが基材の全周囲で側面に回り込まない最
終成形品が得られる型に変更した〔図7(C)参照〕。
この他は、実施例同様に中間成形品を成形し、実施例同
様にトリミングした。その結果、図7(D)の如く、基
材Bの末端である積層シートと余剰シートとの連結部で
は、余剰シート1を切断できず、支持具11の支持端E
2で切断され、望み通りの場所で正確にトリミングでき
なかった。[Comparative Example] In contrast to the embodiment, the injection molding die was used on the surface of the base material such that the angle formed by the connection between the surplus sheet and the laminated sheet in the intermediate molded product was approximately 180 degrees. Was changed to a mold capable of obtaining a final molded product in which the laminated sheet did not wrap around the entire periphery of the base material (see FIG. 7C).
Except for this, an intermediate molded product was formed in the same manner as in the example, and trimmed as in the example. As a result, as shown in FIG. 7 (D), the surplus sheet 1 cannot be cut at the connecting portion between the laminated sheet and the surplus sheet, which is the end of the base material B, and the supporting end E of the support 11 is not cut.
2 and could not be trimmed exactly where desired.
【0034】[0034]
【発明の効果】本発明の中間成形品によれば、中間成
形品(最終成形品)の元々の形状が異なったり、或いは
熱収縮によって中間成形品の形状が変化したりして、余
剰シートをトリミングすべき形状が異なっても、トリミ
ング装置側ではトリミング形状に正確に一致させる対応
無しに、余剰シートの根元(製品末端)の正確な位置で
容易にトリミングできる。 また、本発明の射出成形同時絵付方法によれば、上記
中間成形品を利用することで、余剰シートが正確な位置
でトリミングされた最終成形品が容易に得られる。According to the intermediate molded product of the present invention, the original shape of the intermediate molded product (final molded product) is different, or the shape of the intermediate molded product is changed by heat shrinkage, so that the surplus sheet is reduced. Even if the shapes to be trimmed are different, the trimming device can easily trim at the correct position at the root (end of the product) of the surplus sheet without corresponding to the trimming shape exactly. Further, according to the simultaneous painting method for injection molding of the present invention, by using the intermediate molded product, a final molded product in which the surplus sheet is trimmed at an accurate position can be easily obtained.
【図1】本発明の中間成形品における余剰シートの状態
とトリミングによる切断部分を説明する概念図。FIG. 1 is a conceptual diagram illustrating a state of a surplus sheet and a cut portion by trimming in an intermediate molded product of the present invention.
【図2】中間成形品に於ける余剰シートと積層シートの
連結部での角度を例示する断面図。FIG. 2 is a cross-sectional view illustrating an angle at a connecting portion between a surplus sheet and a laminated sheet in an intermediate molded product.
【図3】本発明の射出成形同時絵付方法に於けるトリミ
ング工程として、振動利用のトリミング方法及とその装
置を或る一例で説明する概念図。FIG. 3 is a conceptual diagram illustrating, as an example, a method and apparatus for trimming using vibration as a trimming step in the simultaneous painting method for injection molding of the present invention.
【図4】本発明の射出成形同時絵付方法に於ける中間成
形品の成形工程をその一形態で説明する概念図。FIG. 4 is a conceptual diagram illustrating, in one form, a molding step of an intermediate molded product in the simultaneous injection molding painting method of the present invention.
【図5】従来の射出成形同時絵付方法に於いて、型に設
けた刃部で余剰シートを剪断してトリミングする一例を
示す概念図。FIG. 5 is a conceptual diagram showing an example in which a surplus sheet is sheared and trimmed by a blade provided in a mold in a conventional simultaneous injection molding painting method.
【図6】振動利用のトリミング方法を或る一例で説明す
る概念図。FIG. 6 is a conceptual diagram illustrating a trimming method using vibration using an example.
【図7】従来の中間成形品における余剰シートの状態を
説明する概念図。FIG. 7 is a conceptual diagram illustrating a state of a surplus sheet in a conventional intermediate molded product.
1 余剰シート 2 積層シート 3 連結部 4 成形品本体 11 支持具(支持手段) 12 固定チャック 13 アーム 14 中間成形品支持具 15 励振装置 41 吸引孔 42 シートクランプ 43 トリミング用刃部 B 基材 E1 基材の末端 E2 支持端 Ma 射出成形型(雄型) Mb 射出成形型(雌型) P 最終成形品 W、Wa 中間成形品 θ 余剰シートと積層シートとがそれら連結部で成す
角度DESCRIPTION OF SYMBOLS 1 Excess sheet 2 Laminated sheet 3 Connection part 4 Molded product main body 11 Supporter (supporting means) 12 Fixed chuck 13 Arm 14 Intermediate molded product supporter 15 Exciter 41 Suction hole 42 Sheet clamp 43 Trimming blade B Base E1 base End of material E2 Supporting end Ma Injection mold (male type) Mb Injection mold (female type) P Final molded product W, Wa Intermediate molded product θ Angle formed between the excess sheet and the laminated sheet at their joints
───────────────────────────────────────────────────── フロントページの続き Fターム(参考) 4F100 AK12B AK12G AK12J AK25A AK25G AK27B AK27J AL01B BA02 BA10A BA10B BA15 CB00 EH312 EH362 EJ201 EJ241 EJ303 EJ421 GB33 HB00 HB31 JL02 4F206 AA13 AD05 AD09 AF10 AG03 AH26 JA07 JB13 JB19 JL02 JM06 JN41 ──────────────────────────────────────────────────続 き Continued on the front page F term (reference) 4F100 AK12B AK12G AK12J AK25A AK25G AK27B AK27J AL01B BA02 BA10A BA10B BA15 CB00 EH312 EH362 EJ201 EJ241 EJ303 EJ421 GB33 HB00 HB31 JL02 JF04 AJ13 JF05
Claims (2)
に積層されない部分のシートである余剰シートが未だト
リミングされていない状態の中間成形品において、 該余剰シートが、基材に積層されている部分のシートで
ある積層シートと、基材の末端で連結している連結部に
おいて、余剰シートと積層シートとの成す角度が180
度以外の角度である中間成形品。1. An intermediate molded product in which a sheet is bonded to a base material and a surplus sheet, which is a part of the sheet not laminated to the base material, has not been trimmed yet. The angle between the surplus sheet and the laminated sheet is 180 degrees at the connecting portion which is connected at the end of the base material to the laminated sheet which is the portion of the sheet.
Intermediate molded products with angles other than degrees.
型を型締めし、両型で形成されるキャビティ内に流動状
態の樹脂を充填して、成形と同時に樹脂成形物からなる
基材の表面にシートを貼り合わせた後、両型を型開き
し、請求項1記載の中間成形品を得て、 次いで、該中間成形品の余剰シートをトリミングして最
終成形品とする射出成形同時絵付方法。2. After the sheet is inserted between a pair of molds, both molds are clamped, and a cavity formed by both molds is filled with a resin in a flowing state, and is formed of a resin molded product at the same time as molding. After laminating the sheet on the surface of the base material, both molds are opened to obtain the intermediate molded product according to claim 1, and then the surplus sheet of the intermediate molded product is trimmed to obtain the final molded product. Simultaneous painting method.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP26104998A JP4450878B2 (en) | 1998-09-16 | 1998-09-16 | Trimming method |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP26104998A JP4450878B2 (en) | 1998-09-16 | 1998-09-16 | Trimming method |
Publications (2)
Publication Number | Publication Date |
---|---|
JP2000084975A true JP2000084975A (en) | 2000-03-28 |
JP4450878B2 JP4450878B2 (en) | 2010-04-14 |
Family
ID=17356363
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JP26104998A Expired - Fee Related JP4450878B2 (en) | 1998-09-16 | 1998-09-16 | Trimming method |
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JP (1) | JP4450878B2 (en) |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2002292679A (en) * | 2001-03-29 | 2002-10-09 | Nissha Printing Co Ltd | Decorative film which can be drawn deeply |
US7655163B2 (en) | 2007-05-09 | 2010-02-02 | Sanwa Screen Co., Ltd. | Manufacturing method of film insert molded article |
Families Citing this family (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
KR101765701B1 (en) | 2016-09-27 | 2017-08-08 | 영진하이테크 주식회사 | System for trimming carbon fiber |
-
1998
- 1998-09-16 JP JP26104998A patent/JP4450878B2/en not_active Expired - Fee Related
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2002292679A (en) * | 2001-03-29 | 2002-10-09 | Nissha Printing Co Ltd | Decorative film which can be drawn deeply |
US7655163B2 (en) | 2007-05-09 | 2010-02-02 | Sanwa Screen Co., Ltd. | Manufacturing method of film insert molded article |
Also Published As
Publication number | Publication date |
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JP4450878B2 (en) | 2010-04-14 |
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