JP6929000B2 - Resin panel parts and their manufacturing methods - Google Patents

Resin panel parts and their manufacturing methods Download PDF

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JP6929000B2
JP6929000B2 JP2017187850A JP2017187850A JP6929000B2 JP 6929000 B2 JP6929000 B2 JP 6929000B2 JP 2017187850 A JP2017187850 A JP 2017187850A JP 2017187850 A JP2017187850 A JP 2017187850A JP 6929000 B2 JP6929000 B2 JP 6929000B2
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molded body
panel
resin
mold
primary molded
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JP2019059214A (en
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真 永井
真 永井
拓郎 東
拓郎 東
翼 沖野
翼 沖野
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Daihatsu Motor Co Ltd
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Description

本発明は、樹脂パネル部品に関し、特に、一次成形体と二次成形体とを同一金型内で成形する多色成形法により形成された樹脂パネル部品に関する。 The present invention relates to a resin panel part, and more particularly to a resin panel part formed by a multicolor molding method in which a primary molded body and a secondary molded body are molded in the same mold.

下記の特許文献１には、異なる種類の樹脂からなる一次成形体及び二次成形体を同一金型内で一体的に射出成形する、いわゆる多色成形法で形成した自動車の内装品（例えばインストルメントパネル）が示されている。具体的には、まず、図６に示すように、上型１２０と下型１３０とを型締めすると共に、スライド型１４０を上型１２０に当接させることにより第１キャビティ１５０を形成し、この第１キャビティ１５０に樹脂を射出して一次成形体１０２を形成する。その後、図７に示すようにスライド型１４０を上型１２０から離反させることにより第２キャビティ１６０を形成し、この第２キャビティ１６０に樹脂を射出して二次成形体１０３を形成する。以上により、一次成形体１０２と二次成形体１０３とを一体に有する樹脂パネル部品１０１が形成される。 In Patent Document 1 below, an automobile interior product (for example, an instrument) formed by a so-called multicolor molding method in which a primary molded body and a secondary molded body made of different types of resins are integrally injection-molded in the same mold. The ment panel) is shown. Specifically, first, as shown in FIG. 6, the upper mold 120 and the lower mold 130 are molded, and the slide mold 140 is brought into contact with the upper mold 120 to form the first cavity 150. Resin is injected into the first cavity 150 to form the primary molded body 102. After that, as shown in FIG. 7, the slide mold 140 is separated from the upper mold 120 to form the second cavity 160, and the resin is injected into the second cavity 160 to form the secondary molded body 103. As described above, the resin panel component 101 having the primary molded body 102 and the secondary molded body 103 integrally is formed.

同文献に記載の発明では、第１キャビティ１５０の端部を先細り形状とすることで、第１キャビティ１５０で成形される一次成形体１０２の端部を早期に硬化させている。これにより、図７に示す第２キャビティ１６０に樹脂を射出した際に、この樹脂が一次成形体１０２の意匠面１０２ａと上型１２０との間に入り込む事態を回避し、一次成形体１０２の意匠面１０２ａと二次成形体１０３の意匠面１０３ａとの見切り線１０４の不明瞭化を防止している。 In the invention described in the same document, the end portion of the primary molded body 102 formed in the first cavity 150 is cured at an early stage by forming the end portion of the first cavity 150 into a tapered shape. As a result, when the resin is injected into the second cavity 160 shown in FIG. 7, the situation in which the resin enters between the design surface 102a of the primary molded body 102 and the upper mold 120 is avoided, and the design of the primary molded body 102 is prevented. It prevents the parting line 104 between the surface 102a and the design surface 103a of the secondary molded body 103 from being obscured.

特開２０１５−９４４９号公報Japanese Unexamined Patent Publication No. 2015-9449

上記のように、特許文献１には、一次成形体１０２の端部の肉厚を薄くすることで、樹脂パネル部品１０１の意匠面の見切り線１０４の不明瞭化を防止する技術が示されている。しかし、樹脂パネル部品１０１の裏面（意匠面と反対側の面）では、多少の樹脂漏れが生じたとしても外観には影響しないため、特に問題が無いと考えられていた。 As described above, Patent Document 1 discloses a technique for preventing obscuring the parting line 104 on the design surface of the resin panel component 101 by reducing the wall thickness of the end portion of the primary molded body 102. There is. However, on the back surface of the resin panel component 101 (the surface opposite to the design surface), even if some resin leakage occurs, it does not affect the appearance, so it was considered that there is no particular problem.

しかし、本発明者らの検証により、多色成形により樹脂パネル部品を形成する場合、一次成形体と二次成形体との意匠面側の境界（見切り線）付近における樹脂漏れだけでなく、裏面側の境界付近における樹脂漏れも問題となることが明らかになった。すなわち、図７に示すように第２キャビティ１６０に樹脂を射出した際、一次成形体１０２が完全に固化していないと、一次成形体１０２の裏面と下型１３０との間に溶融樹脂Ｐ（図７に散点で示す）が入り込み、この溶融樹脂Ｐに射出圧が加わることで、一次成形体１０２が意匠面側（図中上方）に押し込まれる。これにより、金型から取り出した樹脂パネル部品１０１の一次成形体１０２の意匠面１０２ａに盛り上がり部Ｑ（図７に点線で示す）が形成されるおそれがある。 However, according to the verification by the present inventors, when the resin panel parts are formed by multicolor molding, not only the resin leakage near the boundary (parting line) on the design surface side between the primary molded body and the secondary molded body, but also the back surface. It has become clear that resin leakage near the side boundary is also a problem. That is, as shown in FIG. 7, when the resin is injected into the second cavity 160, if the primary molded body 102 is not completely solidified, the molten resin P (between the back surface of the primary molded body 102 and the lower mold 130 ( (Indicated by scattered points in FIG. 7) enters, and the injection pressure is applied to the molten resin P, so that the primary molded body 102 is pushed toward the design surface side (upper part in the drawing). As a result, a raised portion Q (shown by a dotted line in FIG. 7) may be formed on the design surface 102a of the primary molded body 102 of the resin panel component 101 taken out from the mold.

以上のような事情から、本発明は、多色成形により形成される樹脂パネル部品において、一次成形品の意匠面の変形を防止することを目的とする。 From the above circumstances, it is an object of the present invention to prevent deformation of the design surface of the primary molded product in the resin panel parts formed by multicolor molding.

前記課題を解決するために、本発明は、意匠面を有する一次成形体と、前記一次成形体の意匠面と隣接する意匠面が設けられた本体部、及び、前記一次成形体の裏面に固定された固定部を有する二次成形体とを備え、前記一次成形体及び前記二次成形体が多色成形により一体に形成された樹脂パネル部品であって、前記一次成形体のうち、前記一次成形体の裏面と前記二次成形体の裏面との境界における肉厚が、前記境界よりも前記二次成形体から離反した領域における肉厚よりも薄いパネル部品を提供する。 In order to solve the above problems, the present invention is fixed to a primary molded body having a design surface, a main body portion provided with a design surface adjacent to the design surface of the primary molded body, and the back surface of the primary molded body. A resin panel part comprising a secondary molded body having a fixed portion, and the primary molded body and the secondary molded body are integrally formed by multicolor molding. Among the primary molded bodies, the primary molded body is described. Provided is a panel component in which the wall thickness at the boundary between the back surface of the molded body and the back surface of the secondary molded body is thinner than the wall thickness in the region separated from the secondary molded body than the boundary.

このように、一次成形体のうち、一次成形体の裏面と二次成形体の裏面との境界における肉厚を薄くすることで、一次成形体を射出成形した後、上記境界近傍を早期に硬化させることができる。これにより、二次成形体を成形する第２キャビティに溶融樹脂を射出した際に、溶融樹脂の射出圧による一次成形体の上記境界近傍の変形が抑えられるため、一次成形体の裏面と金型との間に溶融樹脂が入り込む事態を防止できる。 In this way, among the primary molded bodies, by reducing the wall thickness at the boundary between the back surface of the primary molded body and the back surface of the secondary molded body, the primary molded body is injection-molded and then the vicinity of the boundary is cured at an early stage. Can be made to. As a result, when the molten resin is injected into the second cavity for molding the secondary molded body, deformation of the primary molded body near the boundary due to the injection pressure of the molten resin is suppressed, so that the back surface of the primary molded body and the mold are suppressed. It is possible to prevent the molten resin from entering between and.

このことから、本発明は、意匠面を有する一次成形体と、前記一次成形体の意匠面と隣接する意匠面が設けられた本体部、及び、前記一次成形体の裏面に固定された固定部を有する二次成形体とを備えた樹脂パネル部品の製造方法であって、金型本体及びスライド型を有する一方の金型と、前記一方の金型に対して接近・離反可能な他方の金型とを型締めして第１キャビティを形成し、前記第１キャビティに樹脂を射出することにより前記一次成形体を成形する工程と、前記スライド型を前記金型本体に対してスライドさせて前記他方の金型から離反させることにより第２キャビティを形成し、前記第２キャビティに、前記パネル本体の樹脂とは異なる樹脂を射出することにより、前記二次成形体を成形する工程とを有し、前記第１キャビティのうち、前記スライド型の成形面と前記金型本体の成形面との境界におけるパネル厚さ方向寸法が、前記境界よりも前記スライド型から離反した領域におけるパネル厚さ方向寸法よりも小さい樹脂パネル部品の製造方法としても特徴づけられる。 From this, the present invention has a primary molded body having a design surface, a main body portion provided with a design surface adjacent to the design surface of the primary molded body, and a fixing portion fixed to the back surface of the primary molded body. It is a method of manufacturing a resin panel part including a secondary molded body having A step of molding the primary molded body by molding a mold to form a first cavity and injecting a resin into the first cavity, and sliding the slide mold with respect to the mold main body to obtain the above. It has a step of forming a second cavity by separating it from the other mold, and injecting a resin different from the resin of the panel body into the second cavity to form the secondary molded body. In the first cavity, the panel thickness direction dimension at the boundary between the molding surface of the slide mold and the molding surface of the mold body is the panel thickness direction dimension in the region separated from the slide mold from the boundary. It is also characterized as a method for manufacturing smaller resin panel parts.

以上のように、本発明によれば、多色成形により樹脂パネル部品を形成するにあたり、樹脂パネル部品の裏面における樹脂漏れを防止できるため、これに起因する一次成形体の意匠面の変形を防止できる。 As described above, according to the present invention, when the resin panel component is formed by multicolor molding, the resin leakage on the back surface of the resin panel component can be prevented, so that the deformation of the design surface of the primary molded body due to this can be prevented. can.

樹脂パネル部品（インストルメントパネル）の斜視図である。It is a perspective view of a resin panel component (instrument panel). （Ａ）は、図１のＸ−Ｘ断面図であり、（Ｂ）はＡ図のＹ−Ｙ断面図である。(A) is a cross-sectional view taken along the line XX of FIG. 1, and (B) is a cross-sectional view taken along the line YY of FIG. （Ａ）及び（Ｂ）は、樹脂パネル部品のパネル本体及び加飾部材を二色成形で形成する手順を示す断面図である。(A) and (B) are cross-sectional views showing a procedure for forming a panel body and a decorative member of a resin panel component by two-color molding. 他の実施形態に係る樹脂パネル部品の断面図である。It is sectional drawing of the resin panel part which concerns on other embodiment. さらに他の実施形態に係る樹脂パネル部品の断面図である。It is sectional drawing of the resin panel part which concerns on still another Embodiment. 従来の樹脂パネル部品を二色成形で形成する様子を示す断面図であり、一次成形体を成形する工程を示す。It is sectional drawing which shows the state of forming the conventional resin panel part by two-color molding, and shows the process of forming a primary molded body. 従来の樹脂パネル部品を二色成形で形成する様子を示す断面図であり、二次成形体を成形する工程を示す。It is sectional drawing which shows the state of forming the conventional resin panel part by two-color molding, and shows the process of molding a secondary molded body.

以下、本発明の実施形態を図面に基づいて説明する。 Hereinafter, embodiments of the present invention will be described with reference to the drawings.

図１に、本実施形態に係る樹脂パネル部品としての自動車のインストルメントパネル１を示す。インストルメントパネル１は、パネル本体１０と加飾部材２０とを一体に備える。パネル本体１０は意匠面１０ａを有し、加飾部材２０は、パネル本体１０の意匠面１０ａに沿って連続的に延びる線状の意匠面（加飾線２０ａ）を有する。図示例では、加飾線２０ａが車幅方向に沿って略直線状に延びている。パネル本体１０と加飾部材２０とは、異なる樹脂で形成される。尚、「異なる樹脂」とは、色、光沢、質感等の見た目が異なる樹脂であり、ベース樹脂が異なるものの他、ベース樹脂が同じであっても、添加する材料の種類や配合比を異ならせることで色等を異ならせたものを含む。 FIG. 1 shows an automobile instrument panel 1 as a resin panel component according to the present embodiment. The instrument panel 1 integrally includes a panel body 10 and a decorative member 20. The panel main body 10 has a design surface 10a, and the decorative member 20 has a linear design surface (decorative line 20a) extending continuously along the design surface 10a of the panel main body 10. In the illustrated example, the decorative line 20a extends substantially linearly along the vehicle width direction. The panel body 10 and the decorative member 20 are made of different resins. The "different resins" are resins having different appearances such as color, luster, and texture, and have different base resins, and even if the base resins are the same, the types and compounding ratios of the materials to be added are different. Including those with different colors.

パネル本体１０は、計器やオーディオ等を取り付ける貫通孔や凹部等を有する正面部１２と、貫通孔を有さない平滑な上面部１３とを備える。図示例では、正面部１２の上端付近に、車幅方向に延びる加飾線２０ａを備えた加飾部材２０が設けられる。加飾線２０ａを設ける場所これに限らず、例えば上面部１３や、正面部１２と上面部１３との境界に加飾線２０ａを設けてもよい。尚、以下では、説明の便宜上、加飾線２０ａの延在方向｛図２（Ｂ）の左右方向｝を「長手方向」、パネル本体１０の意匠面１０ａと直交する方向（図２の上下方向）を「パネル厚さ方向」、長手方向及びパネル厚さ方向の双方と直交する方向｛図２（Ａ）の左右方向｝を「幅方向」と言う。また、パネル厚さ方向で車内空間側（意匠面１０ａ側）を「表側」、その反対側を「裏側」と言う。 The panel body 10 includes a front portion 12 having through holes, recesses, and the like for attaching an instrument, audio, and the like, and a smooth upper surface portion 13 having no through holes. In the illustrated example, a decoration member 20 having a decoration line 20a extending in the vehicle width direction is provided near the upper end of the front portion 12. Place where the decorative line 20a is provided Not limited to this, for example, the decorative line 20a may be provided at the upper surface portion 13 or at the boundary between the front surface portion 12 and the upper surface portion 13. In the following, for convenience of explanation, the extending direction of the decorative line 20a {the left-right direction of FIG. 2B} is the "longitudinal direction", and the direction orthogonal to the design surface 10a of the panel body 10 (the vertical direction of FIG. 2). ) Is referred to as the "panel thickness direction", and the direction orthogonal to both the longitudinal direction and the panel thickness direction {the left-right direction of FIG. 2 (A)} is referred to as the "width direction". Further, in the panel thickness direction, the vehicle interior space side (design surface 10a side) is referred to as "front side", and the opposite side is referred to as "back side".

図２（Ａ）に示すように、加飾部材２０は、パネル本体１０の裏面１０ｂに固定された固定部２１と、加飾線２０ａを有する本体部２２とを有する。図示例では、本体部２２の幅方向両側に固定部２１が設けられる。具体的に、本体部２２が、表側に凸を成した曲面状を成し、本体部２２のパネル厚さ方向裏側の端部から幅方向外側に向けて、平板状の固定部２１が延びている。このように、加飾部材２０に設けた固定部２１をパネル本体１０に固着することで、加飾線２０ａの形状や大きさ等に関わらず、加飾部材２０とパネル本体１０との固定面積を確保することができるため、両者を強固に固定することができる。 As shown in FIG. 2A, the decorative member 20 has a fixing portion 21 fixed to the back surface 10b of the panel main body 10 and a main body portion 22 having a decorative line 20a. In the illustrated example, fixing portions 21 are provided on both sides of the main body portion 22 in the width direction. Specifically, the main body portion 22 has a curved surface shape that is convex on the front side, and the flat plate-shaped fixing portion 21 extends from the end portion on the back side in the panel thickness direction of the main body portion 22 toward the outside in the width direction. There is. By fixing the fixing portion 21 provided on the decorative member 20 to the panel body 10 in this way, the fixed area between the decorative member 20 and the panel body 10 is fixed regardless of the shape and size of the decorative line 20a. Can be secured, so that both can be firmly fixed.

パネル本体１０は、意匠面１０ａの大部分を構成する主要部１０ｃと、加飾線２０ａの近傍に設けられた薄肉部１０ｄとを有する。図示例では、主要部１０ｃの加飾線２０ａ側（幅方向内側）に連続して薄肉部１０ｄが設けられる。主要部１０ｃは、パネル厚さ方向の肉厚が略均一な板状を成している。薄肉部１０ｄは、主要部１０ｃよりもパネル厚さ方向の肉厚が薄い。具体的には、パネル本体１０と加飾部材２０との表面側（意匠面側）の境界Ｂ１におけるパネル本体１０の肉厚Ｔ１、及び、パネル本体１０と加飾部材２０との裏面側（意匠面と反対側）の境界Ｂ２におけるパネル本体１０の肉厚Ｔ２が、何れも主要部１０ｃの肉厚Ｔ３よりも薄くなっている。図示例では、パネル本体１０の薄肉部１０ｄのパネル厚さ方向の肉厚が、加飾線２０ａ側（幅方向内側）に行くにつれて徐々に薄くなっている（Ｔ１＜Ｔ２＜Ｔ３）。尚、主要部１０ｃには、補強や他部材への取り付けを目的とした突起や凹部等が設けられる場合があるが、主要部１０ｃの肉厚Ｔ３は、このような突起や凹部等を除く、厚さが均一な領域における肉厚を言うものとする。 The panel body 10 has a main portion 10c that constitutes most of the design surface 10a, and a thin portion 10d provided in the vicinity of the decorative line 20a. In the illustrated example, the thin portion 10d is continuously provided on the decorative line 20a side (inside in the width direction) of the main portion 10c. The main portion 10c has a plate shape having a substantially uniform wall thickness in the panel thickness direction. The thin portion 10d is thinner in the panel thickness direction than the main portion 10c. Specifically, the wall thickness T1 of the panel main body 10 at the boundary B1 on the front surface side (design surface side) of the panel main body 10 and the decorative member 20, and the back surface side (design) of the panel main body 10 and the decorative member 20. The wall thickness T2 of the panel body 10 at the boundary B2 on the side opposite to the surface) is thinner than the wall thickness T3 of the main portion 10c. In the illustrated example, the wall thickness of the thin portion 10d of the panel body 10 in the panel thickness direction gradually becomes thinner toward the decorative line 20a side (inside in the width direction) (T1 <T2 <T3). The main portion 10c may be provided with protrusions, recesses, etc. for the purpose of reinforcement or attachment to other members, but the wall thickness T3 of the main portion 10c excludes such protrusions, recesses, etc. It shall refer to the wall thickness in the region where the thickness is uniform.

本実施形態では、パネル本体１０に、長手方向に延びるスリット１１が設けられ、このスリット１１の内周に加飾部材２０の本体部２２が入り込んでいる。パネル本体１０のスリット１１の内面と加飾部材２０の本体部２２の幅方向両側の側面とは密着しており、図示例では、これらの面が、パネル厚さ方向で表側に行くにつれて加飾線２０ａの幅方向中央側（互いに接近する側）に傾斜している。加飾部材２０の本体部２２の表側の面のうち、スリット１１から露出した領域が加飾線２０ａとなる。図示例の加飾線２０ａは、表側に凸を成した曲面で構成され、その幅方向両側に意匠面１０ａが隙間なく隣接している。本実施形態では、図２（Ｂ）に示すように、加飾線２０ａが、長手方向（車幅方向）に沿って略直線状に連続して延びる。加飾線２０ａの頂部（表側の端部）は、長手方向全域で、幅方向両側に隣接する意匠面１０ａよりも表側に突出している。 In the present embodiment, the panel main body 10 is provided with a slit 11 extending in the longitudinal direction, and the main body portion 22 of the decorative member 20 is inserted into the inner circumference of the slit 11. The inner surface of the slit 11 of the panel main body 10 and the side surfaces of the main body portion 22 of the decorative member 20 on both sides in the width direction are in close contact with each other. The line 20a is inclined toward the center side in the width direction (the side approaching each other). Of the front surface of the main body 22 of the decorative member 20, the region exposed from the slit 11 is the decorative line 20a. The decorative line 20a in the illustrated example is formed of a curved surface having a convex shape on the front side, and the design surfaces 10a are adjacent to each other on both sides in the width direction without a gap. In the present embodiment, as shown in FIG. 2B, the decorative line 20a extends continuously in a substantially straight line along the longitudinal direction (vehicle width direction). The top portion (front end) of the decorative line 20a projects to the front side from the design surface 10a adjacent to both sides in the width direction over the entire length direction.

加飾部材２０の表側の面と裏側の面とは同一形状を成している。具体的に、本体部２２の表側の面と裏側の面は、同一形状の曲面で構成される。その結果、本体部２２の裏側の面に、長手方向に延びる溝２３が設けられる。固定部２１の表側の面と裏側の面は、パネル厚さ方向と直交する平坦面で構成される。 The front surface and the back surface of the decorative member 20 have the same shape. Specifically, the front surface and the back surface of the main body 22 are formed of curved surfaces having the same shape. As a result, a groove 23 extending in the longitudinal direction is provided on the back surface of the main body 22. The front side surface and the back side surface of the fixing portion 21 are composed of flat surfaces orthogonal to the panel thickness direction.

上記のインストルメントパネル１は、パネル本体１０を一次成形体、加飾部材２０を二次成形体とする多色成形（二色成形）により形成される。以下、上記のインストルメントパネル１の製造方法を説明する。 The instrument panel 1 is formed by multicolor molding (two-color molding) in which the panel body 10 is a primary molded body and the decorative member 20 is a secondary molded body. Hereinafter, a method for manufacturing the above instrument panel 1 will be described.

インストルメントパネル１は、図３に示す金型を用いて形成される。この金型は、可動型３０と、固定型４０とを備える。可動型３０は、可動型本体３１と、スライド型３２とを備える。スライド型３２は、可動型本体３１に対してスライド可能であり、図示例では、パネル厚さ方向にスライド可能とされる。 The instrument panel 1 is formed by using the mold shown in FIG. This mold includes a movable mold 30 and a fixed mold 40. The movable type 30 includes a movable type main body 31 and a slide type 32. The slide type 32 is slidable with respect to the movable main body 31, and in the illustrated example, the slide type 32 is slidable in the panel thickness direction.

固定型４０には、長手方向に延びる凹曲面状の第１成形面４０ａと、第１成形面４０ａの全周を囲み、パネル本体１０の意匠面１０ａを成形する第２成形面４０ｂとが設けられる。第２成形面４０ｂは、パネル本体１０の主要部１０ｃの意匠面を成形する略平坦部４０ｂ１と、パネル本体１０の薄肉部１０ｄの意匠面を成形する傾斜部４０ｂ２とを有する。可動型本体３１は、スライド型３２の全周を囲み、パネル本体１０の裏面１０ｂを成形する成形面３１ａを有する。スライド型３２には、長手方向に延びる凸曲面状の第１成形面３２ａと、第１成形面３２ａの幅方向両側に設けられ、パネル本体１０のスリット１１の内面を成形する第２成形面３２ｂと、第２成形面３２ｂの幅方向外側に設けられ、パネル本体１０の裏面１０ｂを成形する第３成形面３２ｃとが設けられる。図示例では、スライド型３２の一対の第２成形面３２ｂが、パネル厚さ方向表側（図中上方）に行くにつれて幅方向内側に傾斜し、第１成形面３２ａと滑らかに連続している。 The fixed mold 40 is provided with a concave curved first forming surface 40a extending in the longitudinal direction and a second forming surface 40b that surrounds the entire circumference of the first forming surface 40a and forms the design surface 10a of the panel body 10. Be done. The second molded surface 40b has a substantially flat portion 40b1 for forming the design surface of the main portion 10c of the panel main body 10 and an inclined portion 40b2 for forming the design surface of the thin portion 10d of the panel main body 10. The movable main body 31 has a molding surface 31a that surrounds the entire circumference of the slide mold 32 and forms the back surface 10b of the panel main body 10. The slide mold 32 is provided with a convex curved first forming surface 32a extending in the longitudinal direction and both sides of the first forming surface 32a in the width direction to form the inner surface of the slit 11 of the panel body 10. And a third molding surface 32c that is provided on the outer side of the second molding surface 32b in the width direction and that forms the back surface 10b of the panel body 10. In the illustrated example, the pair of second forming surfaces 32b of the slide type 32 are inclined inward in the width direction toward the front side (upper side in the drawing) in the panel thickness direction, and are smoothly continuous with the first forming surface 32a.

まず、図３（Ａ）に示すように、可動型３０と固定型４０とを型締めする。具体的には、可動型本体３１を固定型４０に当接させると共に、スライド型３２の第１成形面３２ａを固定型４０の第１成形面４０ａに嵌合させる。これにより、固定型４０の第２成形面４０ｂと、可動型本体３１の成形面３１ａと、スライド型３２の第２成形面３２ｂ及び第３成形面３２ｃとで、第１キャビティ５１が形成される。第１キャビティ５１は、パネル本体１０の主要部１０ｃを成形する主要領域５１ａと、パネル本体１０の薄肉部１０ｄを成形する薄肉領域５１ｂとを有する。第１キャビティ５１の主要領域５１ａは、固定型４０の第２成形面４０ｂの略平坦部４０ｂ１と、可動型本体３１の成形面３１ｂとの間に設けられる。第１キャビティ５１の薄肉領域５１ｂは、固定型４０の第２成形面４０ｂの傾斜部４０ｂ２と、可動型本体３１の成形面３１ｂ及びスライド型３２の第３成形面３２ｃとの間に設けられる。この第１キャビティ５１に樹脂を射出し、樹脂が固化することにより、パネル本体１０が成形される。このとき、第１キャビティ５１の薄肉領域５１ｂ内の樹脂（パネル本体１０の薄肉部１０ｄ）は、主要領域５１ａ内の樹脂（パネル本体１０の主要部１０ｃ）よりも早期に固化する。 First, as shown in FIG. 3A, the movable mold 30 and the fixed mold 40 are molded. Specifically, the movable main body 31 is brought into contact with the fixed mold 40, and the first molding surface 32a of the slide mold 32 is fitted to the first molding surface 40a of the fixed mold 40. As a result, the first cavity 51 is formed by the second molding surface 40b of the fixed mold 40, the molding surface 31a of the movable main body 31, and the second molding surface 32b and the third molding surface 32c of the slide mold 32. .. The first cavity 51 has a main region 51a for forming the main portion 10c of the panel main body 10 and a thin-walled region 51b for forming the thin-walled portion 10d of the panel main body 10. The main region 51a of the first cavity 51 is provided between the substantially flat portion 40b1 of the second molding surface 40b of the fixed mold 40 and the molding surface 31b of the movable main body 31. The thin-walled region 51b of the first cavity 51 is provided between the inclined portion 40b2 of the second molding surface 40b of the fixed mold 40, the molding surface 31b of the movable main body 31, and the third molding surface 32c of the slide mold 32. The panel body 10 is formed by injecting the resin into the first cavity 51 and solidifying the resin. At this time, the resin in the thin-walled region 51b of the first cavity 51 (thin-walled portion 10d of the panel main body 10) solidifies earlier than the resin in the main region 51a (main portion 10c of the panel main body 10).

その後、可動型本体３１と固定型４０とを当接させた状態で、図３（Ｂ）に示すように、スライド型３２を固定型４０から離反する側（図中下方）に後退させる。これにより、固定型４０の第１成形面４０ａと、パネル本体１０のスリット１１の内面及び裏面１０ｂと、スライド型３２の第１〜第３成形面３２ａ〜３２ｃとで第２キャビティ５２が形成される。この第２キャビティ５２に、パネル本体１０の樹脂とは異なる樹脂を射出することにより、加飾部材２０が成形される。 After that, with the movable main body 31 and the fixed mold 40 in contact with each other, as shown in FIG. 3 (B), the slide mold 32 is retracted to the side (lower in the figure) away from the fixed mold 40. As a result, the second cavity 52 is formed by the first molding surface 40a of the fixed mold 40, the inner and back surfaces 10b of the slit 11 of the panel body 10, and the first to third molding surfaces 32a to 32c of the slide mold 32. NS. The decorative member 20 is formed by injecting a resin different from the resin of the panel body 10 into the second cavity 52.

このとき、先に成形されたパネル本体１０に、第２キャビティ５２に射出された溶融樹脂の射出圧が加わるが、パネル本体１０に設けられた薄肉部１０ｄが早期に固化することで薄肉部１０ｄの変形が抑えられるため、パネル本体１０と金型との間に溶融樹脂が入り込むことを防止できる。 At this time, the injection pressure of the molten resin injected into the second cavity 52 is applied to the previously molded panel main body 10, but the thin-walled portion 10d provided in the panel main body 10 solidifies at an early stage, so that the thin-walled portion 10d Since the deformation of the resin is suppressed, it is possible to prevent the molten resin from entering between the panel body 10 and the mold.

具体的に、本実施形態では、図３（Ａ）に示す状態で、第１キャビティ５１のうち、スライド型３２と固定型４０との境界Ｂ１’におけるパネル厚さ方向寸法Ｔ１’が、第１キャビティ５１の主要領域５１ａにおけるパネル厚さ方向寸法Ｔ３’よりも小さいため、第１キャビティ５１の幅方向内側端部（境界Ｂ１’）付近の樹脂が、主要領域５１ａの樹脂よりも早期に硬化する。これにより、第１キャビティ５１で成形されたパネル本体１０の薄肉部１０ｄの幅方向内側端部（スリット１１側端部）が完全に固化し、第２キャビティ５２に射出された樹脂の圧力により変形しにくくなるため、この樹脂がパネル本体１０の薄肉部１０ｄの意匠面と固定型４０の第２成形面４０ｂの傾斜部４０ｂ２との間に入り込むことを防止できる。これにより、パネル本体１０の意匠面１０ａに加飾部材２０の樹脂が漏れ出してこれらの境界（見切り線）が不明りょうとなる事態を防止できる。 Specifically, in the present embodiment, in the state shown in FIG. 3A, the panel thickness direction dimension T1'at the boundary B1'between the slide type 32 and the fixed type 40 of the first cavity 51 is the first. Since it is smaller than the panel thickness direction dimension T3'in the main region 51a of the cavity 51, the resin near the inner end in the width direction (boundary B1') of the first cavity 51 cures earlier than the resin in the main region 51a. .. As a result, the inner end in the width direction (end on the slit 11 side) of the thin portion 10d of the panel body 10 formed in the first cavity 51 is completely solidified and deformed by the pressure of the resin injected into the second cavity 52. This resin can be prevented from entering between the design surface of the thin portion 10d of the panel body 10 and the inclined portion 40b2 of the second molding surface 40b of the fixed mold 40. As a result, it is possible to prevent the resin of the decorative member 20 from leaking to the design surface 10a of the panel body 10 and the boundary (parting line) between them becoming unclear.

また、本実施形態では、図３（Ａ）に示す状態で、第１キャビティ５１のうち、スライド型３２と可動型本体３１との境界Ｂ２’におけるパネル厚さ方向寸法Ｔ２’が、境界Ｂ２’よりもスライド型３２から離反した領域（第１キャビティ５１の主要領域５１ａ）におけるパネル厚さ方向寸法Ｔ３’よりも小さいため、第１キャビティの上記境界Ｂ２’付近の樹脂が早期に硬化する。これにより、第１キャビティ５１で成形されたパネル本体１０の薄肉部１０ｄの幅方向中間部（パネル本体１０と加飾部材２０との裏面側の境界Ｂ２付近）が完全に固化し、第２キャビティ５２に射出された樹脂の圧力により変形しにくくなるため、この樹脂がパネル本体１０の薄肉部１０ｄの裏面と可動型本体３１の成形面３１ａとの間に入り込むことを防止できる。これにより、パネル本体１０と可動型本体３１との間に入り込んだ溶融樹脂（図７のＰ部参照）の圧力でパネル本体１０が固定型４０側に押し付けられる事態が回避され、パネル本体１０の意匠面１０ａの変形を防止できる。 Further, in the present embodiment, in the state shown in FIG. 3A, the panel thickness direction dimension T2'at the boundary B2'between the slide type 32 and the movable type main body 31 of the first cavity 51 is the boundary B2'. Since it is smaller than the panel thickness direction dimension T3'in the region separated from the slide mold 32 (main region 51a of the first cavity 51), the resin near the boundary B2'of the first cavity is cured at an early stage. As a result, the intermediate portion in the width direction of the thin portion 10d of the panel body 10 formed in the first cavity 51 (near the boundary B2 on the back surface side between the panel body 10 and the decorative member 20) is completely solidified, and the second cavity is completely solidified. Since it is difficult to be deformed by the pressure of the resin injected into 52, it is possible to prevent this resin from entering between the back surface of the thin portion 10d of the panel main body 10 and the molding surface 31a of the movable main body 31. As a result, the situation where the panel body 10 is pressed against the fixed mold 40 side by the pressure of the molten resin (see the P part in FIG. 7) that has entered between the panel body 10 and the movable body 31 is avoided, and the panel body 10 Deformation of the design surface 10a can be prevented.

本発明は上記の実施形態に限られない。以下、本発明の他の実施形態を説明するが、上記の実施形態と同様の点については、説明を省略する。 The present invention is not limited to the above embodiments. Hereinafter, other embodiments of the present invention will be described, but the same points as those of the above-described embodiments will be omitted.

上記の実施形態では、パネル本体１０の薄肉部１０ｄの肉厚が加飾線２０ａ側へ向けて徐々に薄くなった場合を示したが、これに限られない。例えば、図４に示すように、パネル本体１０の薄肉部１０ｄの肉厚を均一にしてもよい。この場合、パネル本体１０と加飾部材２０との表面側（意匠面側）の境界Ｂ１におけるパネル本体１０の肉厚Ｔ１と、パネル本体１０と加飾部材２０との裏面側（意匠面と反対側）の境界Ｂ２におけるパネル本体１０の肉厚Ｔ２とが等しく、これらが主要部１０ｃの肉厚Ｔ３よりも薄くなっている。 In the above embodiment, the case where the wall thickness of the thin portion 10d of the panel main body 10 gradually becomes thinner toward the decorative line 20a is shown, but the present invention is not limited to this. For example, as shown in FIG. 4, the wall thickness of the thin portion 10d of the panel body 10 may be made uniform. In this case, the wall thickness T1 of the panel main body 10 at the boundary B1 on the front surface side (design surface side) between the panel main body 10 and the decorative member 20 and the back surface side (opposite to the design surface side) of the panel main body 10 and the decorative member 20. The wall thickness T2 of the panel body 10 at the boundary B2 on the side) is equal to that of the wall thickness T3 of the main portion 10c.

図５に示す実施形態では、加飾部材２０が略平板状を成している点で、上記の実施形態と異なる。加飾部材２０のうち、パネル本体１０の裏面１０ｂに固定された部分が固定部２１となり、パネル本体１０のスリット１１を裏側から覆う領域が本体部２２となる。図示例では、本体部２２の幅方向両側に固定部２１が設けられ、本体部２２の表側の面がスリット１１から露出して加飾線２０ａを構成する。このように、加飾部材２０を略平板状とすることで、加飾部材２０を成形する第２キャビティも略平板状となるため、第２キャビティに樹脂が充填されやすくなり、加飾部材２０の成形性、ひいては加飾線２０ａの寸法精度が高められる。 The embodiment shown in FIG. 5 is different from the above embodiment in that the decorative member 20 has a substantially flat plate shape. Of the decorative member 20, the portion fixed to the back surface 10b of the panel main body 10 is the fixing portion 21, and the region covering the slit 11 of the panel main body 10 from the back side is the main body portion 22. In the illustrated example, fixing portions 21 are provided on both sides of the main body portion 22 in the width direction, and the front surface of the main body portion 22 is exposed from the slit 11 to form the decorative line 20a. By forming the decorative member 20 into a substantially flat plate shape in this way, the second cavity for molding the decorative member 20 also has a substantially flat plate shape, so that the second cavity can be easily filled with resin, and the decorative member 20 can be easily filled. The moldability of the decorative wire 20a and the dimensional accuracy of the decorative wire 20a are improved.

また、上記の実施形態では、加飾線２０ａの全周が意匠面１０ａで囲まれているが、加飾線２０ａをパネル本体１０の端部に設けてもよく、例えば、パネル本体１０のうち、オーディオ等を取り付けるための貫通孔の縁に沿って加飾線２０ａを設けてもよい。また、二次成形体の意匠面は、加飾線２０ａに限らず、矩形等の任意の形状とすることができる。 Further, in the above embodiment, the entire circumference of the decorative line 20a is surrounded by the design surface 10a, but the decorative line 20a may be provided at the end of the panel main body 10, for example, of the panel main body 10. , The decorative line 20a may be provided along the edge of the through hole for attaching audio or the like. Further, the design surface of the secondary molded body is not limited to the decorative line 20a, and may have an arbitrary shape such as a rectangle.

また、本発明は、インストルメントパネルに限らず、意匠面を有する一次成形体及び二次成形体が多色成形により一体に形成された樹脂パネル部品であれば、用途や形状を問わずに適用可能である。 Further, the present invention is not limited to the instrument panel, and is applicable regardless of the application or shape as long as the primary molded body and the secondary molded body having a design surface are integrally formed by multicolor molding. It is possible.

１ インストルメントパネル
１０ パネル本体（一次成形体）
１０ａ 意匠面
１０ｂ 裏面
１０ｃ 主要部
１０ｄ 薄肉部
２０ 加飾部材（二次成形体）
２０ａ 加飾線（意匠面）
２１ 固定部
２２ 本体部
３０ 可動型
３１ 可動型本体
３２ スライド型
４０ 固定型
５１ 第１キャビティ
５１ａ 主要領域
５１ｂ 薄肉領域
５２ 第２キャビティ 1 Instrument panel 10 Panel body (primary molded body)
10a Design surface 10b Back surface 10c Main part 10d Thin wall part 20 Decorative member (secondary molded body)
20a Decorative line (design side)
21 Fixed part 22 Main body part 30 Movable type 31 Movable type main body 32 Slide type 40 Fixed type 51 First cavity 51a Main area 51b Thin-walled area 52 Second cavity

Claims (2)

意匠面を有する一次成形体と、前記一次成形体の意匠面と隣接する意匠面が設けられた本体部、及び、前記一次成形体の裏面に固定された固定部を有する二次成形体とを備え、前記一次成形体及び前記二次成形体が多色成形により一体に形成された樹脂パネル部品であって、
前記一次成形体が、前記二次成形体側の端部に設けられた薄肉部と、前記薄肉部に隣接し、前記薄肉部よりも肉厚が厚い主要部とを有し、
前記二次成形体の固定部が、前記一次成形体の薄肉部の裏面に固定され、且つ、前記主要部と離間している樹脂パネル部品。 A primary molded body having a design surface, a main body portion provided with a design surface adjacent to the design surface of the primary molded body, and a secondary molded body having a fixed portion fixed to the back surface of the primary molded body. A resin panel component in which the primary molded body and the secondary molded body are integrally formed by multicolor molding.
The primary molded body has a thin-walled portion provided at an end portion on the secondary molded body side, and a main portion adjacent to the thin-walled portion and thicker than the thin-walled portion.
A resin panel component in which a fixed portion of the secondary molded body is fixed to the back surface of a thin-walled portion of the primary molded body and is separated from the main portion. 意匠面を有する一次成形体と、前記一次成形体の意匠面と隣接する意匠面が設けられた本体部、及び、前記一次成形体の裏面に固定された固定部を有する二次成形体とを備え、前記一次成形体が、前記二次成形体側の端部に設けられた薄肉部と、前記薄肉部に隣接し、前記薄肉部よりも肉厚が厚い主要部とを有する樹脂パネル部品の製造方法であって、
金型本体及びスライド型を有する一方の金型と、前記一方の金型に対して接近・離反可能な他方の金型とを型締めして第１キャビティを形成し、前記第１キャビティに樹脂を射出することにより前記一次成形体を成形する工程と、
前記スライド型を前記金型本体に対してスライドさせて前記他方の金型から離反させることにより第２キャビティを形成し、前記第２キャビティに、前記一次成形体の樹脂とは異なる樹脂を射出することにより、前記二次成形体を成形する工程とを有し、
前記第２キャビティが、前記一次成形体の薄肉部の裏面と接触し、且つ、前記主要部と離間している樹脂パネル部品の製造方法。 A primary molded body having a design surface, a main body portion provided with a design surface adjacent to the design surface of the primary molded body, and a secondary molded body having a fixed portion fixed to the back surface of the primary molded body. Manufacture of a resin panel part in which the primary molded body has a thin-walled portion provided at an end portion on the secondary molded body side and a main portion adjacent to the thin-walled portion and thicker than the thin-walled portion. It ’s a method,
One mold having a mold body and a slide mold and the other mold that can approach and separate from the one mold are molded to form a first cavity, and a resin is formed in the first cavity. And the process of molding the primary molded body by injecting
A second cavity is formed by sliding the slide mold with respect to the mold body and separating it from the other mold, and a resin different from the resin of the primary molded product is injected into the second cavity. This includes a step of molding the secondary molded body.
A method for manufacturing a resin panel component in which the second cavity is in contact with the back surface of a thin-walled portion of the primary molded body and is separated from the main portion.
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