JP2015128886A - resin molding - Google Patents

resin molding Download PDF

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JP2015128886A
JP2015128886A JP2014002258A JP2014002258A JP2015128886A JP 2015128886 A JP2015128886 A JP 2015128886A JP 2014002258 A JP2014002258 A JP 2014002258A JP 2014002258 A JP2014002258 A JP 2014002258A JP 2015128886 A JP2015128886 A JP 2015128886A
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molded product
straight line
lens
primary molded
inscribed
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JP6090177B2 (en
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昌也 米谷
Masaya Yonetani
昌也 米谷
仁 波多野
Hitoshi Hatano
仁 波多野
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Toyoda Gosei Co Ltd
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Abstract

PROBLEM TO BE SOLVED: To inexpensively provide a resin molding which does not have a recess on its surface due to shrinkage at the time of injection molding, has a smooth surface being a design surface, and is excellent in appearance.SOLUTION: A front lens 20 (resin molding) includes a lens body portion 40 (primary molding) and a seal portion 50 (secondary molding) which are integrated with one another by injection molding with double molding. A mounting portion 52 (salient) is formed on a surface 50a of the seal portion 50. A surface 40a of the lens body portion 40 is smooth. On a rear surface 40b of the lens body portion 40, each of ribs 41 and 42 (projections) are formed in portions corresponding to the mounting portion 52. The seal portion 50 covers a rear surface 40b of the lens body portion 40 including each of the ribs 41 and 42.

Description

本発明は樹脂成形品に係り、詳しくは、ダブルモールドにより射出成形されて一体化された一次成形品と二次成形品とを備えた樹脂成形品に関するものである。   The present invention relates to a resin molded product, and more particularly to a resin molded product including a primary molded product and a secondary molded product which are integrated by injection molding by a double mold.

特許文献1には、レンズ本体部と、レンズ本体部の周囲に形成されてハウジングに装着される装着部が形成されたシール部とに分割形成される前面レンズを備えた車両用灯具について、シール部は黒色の樹脂材料によって成形され、レンズ本体部とシール部とは2色成形などの成形時において一体化されている技術が開示されている。   Patent Document 1 discloses a seal for a vehicular lamp including a front lens that is divided and formed into a lens main body and a seal that is formed around the lens main body and is attached to a housing. A technique is disclosed in which the portion is formed of a black resin material, and the lens main body portion and the seal portion are integrated at the time of molding such as two-color molding.

特許文献2には、前面部から側方へ回り込んだ回り込み部と、回り込み部の外周縁部から後方へ突出したシール脚とを備え、回り込み部におけるシール脚の近傍は2色の樹脂にて多色成形されている車輌用灯具のレンズが開示されている。   Patent Document 2 includes a wraparound portion that wraps around from the front portion to the side, and a seal leg that protrudes rearward from the outer peripheral edge portion of the wraparound portion, and the vicinity of the seal leg in the wraparound portion is made of resin of two colors. A multi-color molded vehicle lamp lens is disclosed.

特開2010−225389号公報JP 2010-225389 A 特許第3796366号公報Japanese Patent No. 3796366

特許文献1の技術では、レンズ本体部とシール部とが接続一体化されている部分は肉厚になるため、その部分におけるレンズ本体部の表面には射出成形時に肉ヒケが発生し、その肉ヒケによりレンズ本体部の表面に凹みが形成されるおそれがあり、レンズ本体部の表面は意匠面であることから、凹みにより美観が損なわれるという問題がある。   In the technique of Patent Document 1, since the portion where the lens body portion and the seal portion are connected and integrated is thick, the surface of the lens body portion in that portion is thinned at the time of injection molding. There is a possibility that a dent may be formed on the surface of the lens main body due to the sink, and the surface of the lens main body is a design surface.

特許文献2の技術では、回り込み部とシール脚とが接続一体化されている部分は肉厚になるため、その部分における回り込み部の表面には射出成形時に肉ヒケが発生し、その肉ヒケにより回り込み部の表面に凹みが形成されるおそれがあり、回り込み部の表面は意匠面であることから、凹みにより美観が損なわれるという問題がある。   In the technique of Patent Document 2, the portion where the wraparound portion and the seal leg are connected and integrated is thick, and therefore, the surface of the wraparound portion in that portion is fluffed during injection molding. There is a possibility that a dent may be formed on the surface of the wraparound portion, and since the surface of the wraparound portion is a design surface, there is a problem that the aesthetics are impaired by the dent.

このような射出成形時の肉ヒケによる意匠面の凹みを目立たなくするには、意匠面にセレーションを形成する方法があるが、セレーションの形成工程の分だけ製造コストが増大するという問題がある。
加えて、周囲にセレーションが形成された単調な意匠しか表現できなくなるという問題もある。
そこで、セレーションを形成することなく、意匠面を平滑にすることにより、美観を向上させることが要求されている。
There is a method of forming serrations on the design surface in order to make the dents on the design surface due to meat sink marks at the time of injection molding, but there is a problem that the manufacturing cost increases by the serration forming step.
In addition, there is a problem that only a monotonous design with serrations around it can be expressed.
Therefore, it is required to improve the aesthetics by smoothing the design surface without forming serrations.

本発明は前記問題を解決するためになされたものであって、その目的は、射出成形時の肉ヒケによる表面の凹みが無く、意匠面である表面が平滑で美観に優れた樹脂成形品を低コストに提供することにある。   The present invention has been made in order to solve the above-mentioned problems, and its purpose is to provide a resin molded product that has no surface dents due to meat sink marks during injection molding, has a smooth surface as a design surface, and is excellent in aesthetics. It is to provide at low cost.

本発明者らは前記課題を解決するために鋭意検討を重ねた結果、下記のように本発明の各局面に想到した。   As a result of intensive studies in order to solve the above-mentioned problems, the present inventors have arrived at each aspect of the present invention as follows.

<第1の局面>
第1の局面は、ダブルモールドにより射出成形されて一体化された一次成形品と二次成形品とを備えた樹脂成形品であって、
二次成形品の表面には凸部が形成され、その凸部は樹脂成形品の裏面側へ突出し、
意匠面である一次成形品の表面は平滑であり、一次成形品の裏面にて凸部に対応する箇所には突起部が形成され、
二次成形品は突起部を含めた一次成形品の裏面を被覆する。
<First aspect>
The first aspect is a resin molded product comprising a primary molded product and a secondary molded product which are integrated by injection molding with a double mold,
A convex part is formed on the surface of the secondary molded product, and the convex part projects to the back side of the resin molded product,
The surface of the primary molded product that is the design surface is smooth, and a protrusion is formed at a location corresponding to the convex portion on the back surface of the primary molded product,
The secondary molded product covers the back surface of the primary molded product including the protrusions.

第1の局面において、一次成形品の裏面に突起部を形成しない場合には、二次成形品の凸部の根本部分(一次成形品と二次成形品の凸部とが接続一体化されている部分)が肉厚になるため、その根本部分に対応した一次成形品の表面の箇所には、射出成形時に肉ヒケが発生するおそれがある。   In the first aspect, when the protrusion is not formed on the back surface of the primary molded product, the root portion of the convex portion of the secondary molded product (the primary molded product and the convex portion of the secondary molded product are connected and integrated. Therefore, there is a possibility that a sink mark may be generated at the location of the surface of the primary molded product corresponding to the root portion during injection molding.

それに対して、第1の局面では、一次成形品の裏面に突起部を形成することにより、射出成形時において、二次成形品の凸部の根本部分の肉厚が薄くなるため熱収縮量が小さくなることに加え、突起部を含めた一次成形品の裏面の面剛性が高くなる。
そのため、第1の局面によれば、射出成形時において、二次成形品の凸部の根本部分に対応した一次成形品の表面の箇所に肉ヒケが発生するのを防止可能になり、肉ヒケにより一次成形品の表面に凹みが形成されないことから、一次成形品の表面を平滑に維持できる。
On the other hand, in the first aspect, by forming a protrusion on the back surface of the primary molded product, the thickness of the base portion of the convex portion of the secondary molded product is reduced at the time of injection molding, so the amount of heat shrinkage is reduced. In addition to being reduced, the surface rigidity of the back surface of the primary molded product including the protrusions is increased.
Therefore, according to the first aspect, at the time of injection molding, it becomes possible to prevent the occurrence of meat sink at the surface portion of the primary molded product corresponding to the root of the convex portion of the secondary molded product. As a result, no dent is formed on the surface of the primary molded product, so that the surface of the primary molded product can be kept smooth.

そして、第1の局面では、射出成形時の肉ヒケによる凹みを目立たなくするために一次成形品の表面にセレーションを形成する方法に比べて、製造コストを低減できる。
従って、第1の局面によれば、射出成形時の肉ヒケによる一次成形品の表面の凹みが無く、意匠面である一次成形品の表面が平滑で美観に優れた樹脂成形品を低コストに提供できる。
And in 1st aspect, compared with the method of forming a serration in the surface of a primary molded product in order to make the dent by the meat sink at the time of injection molding inconspicuous, manufacturing cost can be reduced.
Therefore, according to the first aspect, there is no dent on the surface of the primary molded product due to meat sink at the time of injection molding, and the surface of the primary molded product which is the design surface is smooth and excellent in aesthetics at low cost. Can be provided.

<第2の局面>
第2の局面は、第1の局面において、突起部を複数個備えている。
第2の局面では、二次成形品の凸部の根本部分が太く肉厚が大きい場合でも、第1の局面の前記作用・効果が確実に得られる。
<Second aspect>
A second aspect includes a plurality of protrusions in the first aspect.
In the second aspect, even when the root portion of the convex portion of the secondary molded product is thick and the wall thickness is large, the above-mentioned action and effect of the first aspect can be obtained with certainty.

<第3の局面>
第3の局面は、第2の局面において、
突起部として第1突起部と第2突起部とを備え、
第1突起部の底面の中心は第1直線上に配置形成され、
第1直線は、一次成形品の表面に直交すると共に、第1内接円の中心を通る直線であり、
第1内接円は、二次成形品の断面内にて、突起部を設けない場合における一次成形品の裏面と、二次成形品における凸部の表面とに内接する内接円であり、
第2突起部の頂点は第2直線上に配置形成され、
第2直線は、凸部の突出方向に対して直交する方向に凸部を略二分割して、凸部の突出方向に延びる直線であり、
第1直線と第2直線とが交差する。
<Third aspect>
The third aspect is the second aspect,
A first protrusion and a second protrusion as protrusions;
The center of the bottom surface of the first protrusion is disposed on the first straight line,
The first straight line is a straight line that is orthogonal to the surface of the primary molded product and passes through the center of the first inscribed circle,
The first inscribed circle is an inscribed circle inscribed in the back surface of the primary molded product when no protrusion is provided in the cross section of the secondary molded product and the surface of the convex portion in the secondary molded product,
The apex of the second protrusion is formed on the second straight line,
The second straight line is a straight line extending in the protruding direction of the convex portion by roughly dividing the convex portion in a direction orthogonal to the protruding direction of the convex portion,
The first straight line and the second straight line intersect.

第3の局面では、第1直線と第2直線とが交差し、一次成形品の表面に対して二次成形品の凸部が非垂直に突出している。
ここで、第1直線と第2直線とが交差する場合には、第1直線と交差する一次成形品の表面の箇所(第1箇所)と、第2直線と交差する一次成形品の表面の箇所(第2箇所)とに肉ヒケが発生するおそれがある。または、前記第1箇所の肉ヒケと前記第2箇所の肉ヒケとが合体し、その合体した大きな肉ヒケが第1箇所および第2箇所を含む広範囲にわたる箇所に発生するおそれがある。
しかし、第3の局面では、第1突起部および第2突起部の配置箇所が最適化され、第1直線と第2直線とが交差する箇所が、二次成形品の凸部の根本部分になるため、一次成形品の表面の前記箇所に肉ヒケが発生するのを防止可能になり、第1の局面の前記作用・効果が確実に得られる。
In the third aspect, the first straight line and the second straight line intersect each other, and the convex portion of the secondary molded product projects non-perpendicularly with respect to the surface of the primary molded product.
Here, in the case where the first straight line and the second straight line intersect, the location of the surface of the primary molded product (first location) that intersects the first straight line and the surface of the primary molded product that intersects the second straight line. There is a possibility that meat sink marks may occur at the location (second location). Alternatively, the meat sink at the first location and the meat sink at the second location may be combined, and the combined large meat sink may occur in a wide range of locations including the first location and the second location.
However, in the third aspect, the location where the first projection and the second projection are arranged is optimized, and the location where the first straight line and the second straight line intersect is the root of the convex portion of the secondary molded product. Therefore, it is possible to prevent the occurrence of meat sink marks at the location on the surface of the primary molded product, and the operation and effect of the first aspect can be reliably obtained.

<第4の局面>
第4の局面は、第2の局面または第3の局面において、二次成形品の断面内にて、一次成形品の裏面と、二次成形品の表面と、突起部とに内接する複数個の内接円について、それら複数個の内接円の直径の差が少なくなるように、突起部の個数と配置箇所と形状とが設定されている。
第4の局面では、突起部の個数と配置箇所と形状とが全て最適化されるため、第1の局面の前記作用・効果が確実に得られる。
<Fourth aspect>
In the second aspect or the third aspect, the fourth aspect includes a plurality of inscribed in the cross section of the secondary molded product, the back surface of the primary molded product, the surface of the secondary molded product, and the protrusion. With respect to the inscribed circle, the number of protrusions, the arrangement location, and the shape are set so that the difference in diameter between the plurality of inscribed circles is reduced.
In the fourth aspect, since the number, the arrangement location, and the shape of the protrusions are all optimized, the operation and effect of the first aspect can be reliably obtained.

<第5の局面>
第5の局面は、第1〜第4の局面において、一次成形品は透明であり、二次成形品は不透明である。
一次成形品が透明であり、二次成形品が不透明である場合には、一次成形品の表面に肉ヒケによる凹みが形成されると、その凹みが凹レンズとして作用し、その凹みや、その凹みの背後の二次成形品が悪目立ちして美観が著しく損なわれる。
しかし、第5の局面では、一次成形品の表面が平滑であるため、美観が損なわれるのを防止できる。
<5th aspect>
According to a fifth aspect, in the first to fourth aspects, the primary molded product is transparent, and the secondary molded product is opaque.
When the primary molded product is transparent and the secondary molded product is opaque, if a dent due to flesh sink marks is formed on the surface of the primary molded product, the dent acts as a concave lens. The secondary molded product behind is conspicuous and the aesthetic appearance is significantly impaired.
However, in the fifth aspect, since the surface of the primary molded product is smooth, the appearance can be prevented from being impaired.

<第6の局面>
第6の局面は、第1〜第5の局面において、凸部はフランジ状であり、突起部は凸部の形状に対応したリブ状である。
第6の局面では、長尺物である樹脂成形品の長手方向にフランジ状の凸部を形成した場合でも、突起部を凸部の形状に対応したリブ状にすることにより、第1の局面の前記作用・効果が確実に得られる。
<Sixth aspect>
In a sixth aspect, in the first to fifth aspects, the convex portion has a flange shape, and the projecting portion has a rib shape corresponding to the shape of the convex portion.
In the sixth aspect, even when the flange-shaped convex portion is formed in the longitudinal direction of the resin molded product that is a long product, the projecting portion is formed into a rib shape corresponding to the shape of the convex portion. The above-mentioned actions and effects can be obtained with certainty.

<第7の局面>
第7の局面は、第1〜第6の局面において、二次成形品の端面は一次成形品によって被覆されている。
第7の局面では、二次成形品の端面にバリが形成されるのを防止できる。
<Seventh aspect>
In a seventh aspect, in the first to sixth aspects, the end surface of the secondary molded product is covered with the primary molded product.
In the seventh aspect, burrs can be prevented from being formed on the end surface of the secondary molded product.

本発明を具体化した一実施形態の前面レンズ20を備えたラジエータグリル10の要部縦断面図。The principal part longitudinal cross-sectional view of the radiator grille 10 provided with the front lens 20 of one Embodiment which actualized this invention. ラジエータグリル10の要部縦断面図。FIG. 2 is a longitudinal sectional view of a main part of the radiator grill 10. 前面レンズ20を前方側(図1および図2に示す矢印α方向)から見た要部正面図。The principal part front view which looked at the front lens 20 from the front side (arrow (alpha) direction shown in FIG. 1 and FIG. 2).

図1〜図3に示すように、ラジエータグリル10は、自動車のラジエータ(図示略)の前方側に取り付けられる長尺物の装飾部材であり、前面レンズ20(レンズ本体部40、レンズ本体部40の表面40a、レンズ本体部40の裏面40b,40c、リブ41,42、リブ41の底面の中心41a、リブ42の頂点42a、レンズ本体部40の上端部43、シール部50、シール部50の表面50a、積層部51、積層部51の上端面51a、積層部51の表面51b、装着部52、装着部52の基端部52a、装着部52の先端部52b、装着部52の底面52c)およびハウジング30(嵌合凹部31)を備える。   As shown in FIGS. 1 to 3, the radiator grille 10 is a long decorative member attached to the front side of a car radiator (not shown), and includes a front lens 20 (a lens main body 40, a lens main body 40). The front surface 40a of the lens body 40, the back surfaces 40b and 40c of the lens body 40, the ribs 41 and 42, the center 41a of the bottom surface of the rib 41, the apex 42a of the rib 42, the upper end 43 of the lens body 40, the seal 50 and the seal 50 Surface 50a, laminated portion 51, upper end surface 51a of laminated portion 51, surface 51b of laminated portion 51, mounting portion 52, base end portion 52a of mounting portion 52, distal end portion 52b of mounting portion 52, bottom surface 52c of mounting portion 52) And a housing 30 (fitting recess 31).

前面レンズ20は、一次成形品である透明なレンズ本体部40と、二次成形品である黒色不透明なシール部(シール脚)50とを備え、各部40,50は同一の合成樹脂材料(例えば、アクリル樹脂、ポリカーボネート樹脂など)のダブルモールド(二色成形)により射出成形されている。   The front lens 20 includes a transparent lens body 40 that is a primary molded product and a black opaque seal portion (seal leg) 50 that is a secondary molded product, and each of the portions 40 and 50 has the same synthetic resin material (for example, , Acrylic resin, polycarbonate resin, etc.) are injection molded by double molding (two-color molding).

図1および図2に示すように、レンズ本体部40の表面40aは平滑であり、レンズ本体部40における上縁部近傍の裏面(背面)40bには2個のリブ(突条)41,42が前面レンズ20の裏面側へ突出するように形成されている。
レンズ本体部40の上端部43は裏面側に折り曲げられ、上端部43は先端側ほど肉薄に形成されている。
図3に示すように、各リブ41,42は、前面レンズ20の上縁部における長手方向(図3に示す左右方向)に沿って延伸形成された長尺物であり、互いに平行に配置されている。
As shown in FIGS. 1 and 2, the surface 40 a of the lens body 40 is smooth, and two ribs (projections) 41 and 42 are provided on the back surface (back surface) 40 b near the upper edge of the lens body 40. Is formed so as to protrude toward the back side of the front lens 20.
The upper end portion 43 of the lens main body portion 40 is bent to the back side, and the upper end portion 43 is formed thinner toward the front end side.
As shown in FIG. 3, each of the ribs 41 and 42 is a long object extending along the longitudinal direction (the left-right direction shown in FIG. 3) at the upper edge of the front lens 20, and is arranged in parallel to each other. ing.

図1および図2に示すように、シール部50は、積層部51および装着部52を備え、レンズ本体部40の裏面40bに接続一体化(一体形成)されている。
積層部51はレンズ本体部40の上縁部の裏面を被覆し、積層部51は先端側(上端側)ほど肉薄に形成されており、積層部51の上端面51aはレンズ本体部40に向けて傾斜する傾斜面であり、上端面51aはレンズ本体部40の上端部43によって被覆されている。
As shown in FIGS. 1 and 2, the seal portion 50 includes a laminated portion 51 and a mounting portion 52, and is connected and integrated (integrated) with the back surface 40 b of the lens body portion 40.
The laminated portion 51 covers the back surface of the upper edge portion of the lens main body 40, and the laminated portion 51 is formed thinner toward the tip side (upper end side), and the upper end surface 51 a of the laminated portion 51 faces the lens main body portion 40. The upper end surface 51 a is covered with the upper end portion 43 of the lens body portion 40.

図1および図2に示すように、シール部50の装着部52は前面レンズ20の裏面側へ突出し、装着部52は基端部52aから先端部52bへ向かうに連れて肉薄に形成されており、基端部52aは各リブ41,42を含めたレンズ本体部40の裏面40bを被覆している。
図3に示すように、シール部50の積層部51および装着部52は、前面レンズ20の長手方向に沿って延伸形成された長尺物であり、装着部52はフランジ状(庇状)である。
As shown in FIGS. 1 and 2, the mounting portion 52 of the seal portion 50 protrudes toward the back side of the front lens 20, and the mounting portion 52 is formed thinly from the proximal end portion 52 a toward the distal end portion 52 b. The base end portion 52a covers the back surface 40b of the lens main body 40 including the ribs 41 and 42.
As shown in FIG. 3, the laminated portion 51 and the mounting portion 52 of the seal portion 50 are long objects that are formed to extend along the longitudinal direction of the front lens 20, and the mounting portion 52 has a flange shape (saddle shape). is there.

図1および図2に示すように、ハウジング30の前面上縁部には嵌合凹部31が形成され、ハウジング30は不透明な合成樹脂材料(例えば、アクリル樹脂、ポリカーボネート樹脂など)の射出成形により一体形成されている。
嵌合凹部31は、シール部50の装着部52に対応し、ハウジング30の長手方向に沿って延伸形成された長尺物である(図示略)。
As shown in FIGS. 1 and 2, a fitting recess 31 is formed in the upper front edge portion of the housing 30, and the housing 30 is integrally formed by injection molding of an opaque synthetic resin material (for example, acrylic resin, polycarbonate resin, etc.). Is formed.
The fitting recess 31 corresponds to the mounting portion 52 of the seal portion 50 and is a long object (not shown) that is extended along the longitudinal direction of the housing 30.

図1および図2に示すように、ハウジング30の嵌合凹部31には、シール部50の装着部52の先端部52bが嵌合され、嵌合凹部31と装着部52との間隙には熱可塑性の接着剤HMが充填され、接着剤HMにより嵌合凹部31と装着部52とが接着固定されている。
これにより、前面レンズ20とハウジング30とが接着固定され、一体物であるラジエータグリル10が組み立てられる。
尚、ハウジング30は、前面レンズ20の裏面全体を覆うように(図示略)、前面レンズ20の裏面に対して間隙Sを設けて配置されている。
As shown in FIGS. 1 and 2, the fitting recess 31 of the housing 30 is fitted with the tip 52b of the mounting portion 52 of the seal portion 50, and the gap between the fitting recess 31 and the mounting portion 52 is heated. A plastic adhesive HM is filled, and the fitting recess 31 and the mounting portion 52 are bonded and fixed by the adhesive HM.
As a result, the front lens 20 and the housing 30 are bonded and fixed, and the radiator grill 10 that is an integrated object is assembled.
The housing 30 is arranged with a gap S with respect to the back surface of the front lens 20 so as to cover the entire back surface of the front lens 20 (not shown).

図1および図2の矢印αに示すように、ラジエータグリル10を前方側から見ると、前面レンズ20のみが外部に露出され、前面レンズ20のレンズ本体部40の表面40aが意匠面として機能する。
そして、透明なレンズ本体部40と、前面レンズ20の裏面に対して間隙Sを設けて覆う不透明なハウジング30とにより、透明感と奥行き感の両方が視認されるため、ラジエータグリル10の優れた美観を実現できる。
1 and 2, when the radiator grille 10 is viewed from the front side, only the front lens 20 is exposed to the outside, and the surface 40a of the lens body 40 of the front lens 20 functions as a design surface. .
Since the transparent lens body 40 and the opaque housing 30 that covers and covers the back surface of the front lens 20 with a gap S, both the transparency and the depth are visually recognized, the radiator grill 10 is excellent. Aesthetics can be realized.

また、図1および図2の矢印αに示すように、ラジエータグリル10を前方側から見たとき、ハウジング30の嵌合凹部31および接着剤HMが、前面レンズ20のシール部50の裏面側に位置すると共に、黒色不透明なシール部50が透視防止機能を有するため、嵌合凹部31および接着剤HMがシール部50により隠蔽されて外部から見えないことから、ラジエータグリル10の美観が損なわれるのを防止できる。
そして、前面レンズ20のシール部50が可視光を吸収する黒色不透明であることで、シール部50に被覆された各リブ41,42が外部から見え難くなる。
加えて、ハウジング30を前面レンズ20のシール部50と同系色にすれば、シール部50も外部から見え難くなる。
尚、ハウジング30との接着により、前面レンズ20のシール部50には外気温による収縮・膨張に伴う外力が加わることから、その外力によりシール部50に割れが生じるおそれがある。
そのため、シール部50の形成用の合成樹脂材料には、割れを防止するために、ゴム材料が添加されている。
1 and 2, when the radiator grille 10 is viewed from the front side, the fitting recess 31 of the housing 30 and the adhesive HM are formed on the back side of the seal portion 50 of the front lens 20. In addition, since the black opaque seal portion 50 has a function of preventing see-through, the fitting recess 31 and the adhesive HM are concealed by the seal portion 50 and cannot be seen from the outside, so that the aesthetic appearance of the radiator grill 10 is impaired. Can be prevented.
And since the seal part 50 of the front lens 20 is black opaque which absorbs visible light, each rib 41 and 42 coat | covered with the seal part 50 becomes difficult to see from the outside.
In addition, if the housing 30 has the same color as the seal portion 50 of the front lens 20, the seal portion 50 is also difficult to see from the outside.
In addition, since the external force accompanying shrinkage | contraction and expansion | swelling by external temperature is added to the seal part 50 of the front lens 20 by adhesion | attachment with the housing 30, there exists a possibility that the seal part 50 may be cracked by the external force.
Therefore, a rubber material is added to the synthetic resin material for forming the seal portion 50 in order to prevent cracking.

図1に示すように、内接円Raは、前面レンズ20の縦断面内にて、各リブ41,42を設けない場合におけるレンズ本体部40の裏面40cと、シール部50における積層部51と装着部52の接続部分の表面50aと、装着部52の底面52cとに内接する。
直線Laは、レンズ本体部40の表面40aに直交すると共に、内接円Raの中心Oを通る。
リブ41の底面の中心41aは、直線La上に配置形成されている。
直線Lbは、シール部50の装着部52の突出方向に対して直交する方向に装着部52を略二分割して、装着部52の突出方向(延伸方向、延出方向)に延びる。
リブ42の頂点42aは、直線Lb上に配置形成されている。
尚、リブ42の頂点42aは、幾何学的に厳密な意味の頂点である必要はない。
As shown in FIG. 1, the inscribed circle Ra includes a back surface 40 c of the lens main body portion 40 when the ribs 41 and 42 are not provided in the longitudinal section of the front lens 20, and a laminated portion 51 in the seal portion 50. It is inscribed in the surface 50a of the connection part of the mounting part 52, and the bottom face 52c of the mounting part 52.
The straight line La is orthogonal to the surface 40a of the lens body 40 and passes through the center O of the inscribed circle Ra.
The center 41a of the bottom surface of the rib 41 is disposed on the straight line La.
The straight line Lb substantially divides the mounting portion 52 in a direction orthogonal to the protruding direction of the mounting portion 52 of the seal portion 50 and extends in the protruding direction (extending direction, extending direction) of the mounting portion 52.
The apex 42a of the rib 42 is disposed and formed on the straight line Lb.
It should be noted that the apex 42a of the rib 42 does not have to be a geometrically strict apex.

図2に示すように、内接円Rbは、前面レンズ20の縦断面内にて、レンズ本体部40の裏面40bと、シール部50の積層部51の表面51bと、リブ41の表面とに内接する。
内接円Rcは、前面レンズ20の縦断面内にて、シール部50における積層部51と装着部52の接続部分の表面50aと、装着部52の底面52cと、リブ41の表面とに内接する。
内接円Rdは、前面レンズ20の縦断面内にて、装着部52の底面52cと、各リブ41,42の表面とに内接する。
前面レンズ20のレンズ本体部40における各リブ41,42の配置箇所、および、各リブ41,42の縦断面形状は、各内接円Ra〜Rcの直径の差ができるだけ小さくなるように設定されている。
As shown in FIG. 2, the inscribed circle Rb is formed on the back surface 40 b of the lens body 40, the surface 51 b of the laminated portion 51 of the seal portion 50, and the surface of the rib 41 in the longitudinal section of the front lens 20. Inscribed.
The inscribed circle Rc is formed in the longitudinal section of the front lens 20 on the surface 50a of the connecting portion of the sealing portion 50 and the mounting portion 52, the bottom surface 52c of the mounting portion 52, and the surface of the rib 41. Touch.
The inscribed circle Rd is inscribed in the longitudinal section of the front lens 20 with the bottom surface 52c of the mounting portion 52 and the surfaces of the ribs 41 and 42.
The locations of the ribs 41 and 42 in the lens body 40 of the front lens 20 and the longitudinal cross-sectional shape of the ribs 41 and 42 are set so that the difference in diameter between the inscribed circles Ra to Rc is as small as possible. ing.

[実施形態の作用・効果]
本実施形態によれば、以下の作用・効果を得ることができる。
[Operations and effects of the embodiment]
According to this embodiment, the following actions and effects can be obtained.

[1]前面レンズ20(樹脂成形品)は、ダブルモールドにより射出成形されて一体化されたレンズ本体部40(一次成形品)とシール部50(二次成形品)とを備える。
シール部50の表面50aには装着部52(凸部)が形成され、装着部52は前面レンズ20の裏面側へ突出している。
意匠面であるレンズ本体部40の表面40aは平滑であり、レンズ本体部40の裏面40bにて装着部52に対応する箇所には各リブ41,42(突起部)が形成されている。
シール部50は各リブ41,42を含めたレンズ本体部40の裏面40bを被覆する。
[1] The front lens 20 (resin molded product) includes a lens body 40 (primary molded product) and a seal portion 50 (secondary molded product) which are integrated by injection molding using a double mold.
A mounting portion 52 (convex portion) is formed on the surface 50 a of the seal portion 50, and the mounting portion 52 protrudes toward the back side of the front lens 20.
The front surface 40a of the lens body 40, which is a design surface, is smooth, and ribs 41 and 42 (projections) are formed at locations corresponding to the mounting portion 52 on the back surface 40b of the lens body 40.
The seal portion 50 covers the back surface 40 b of the lens body portion 40 including the ribs 41 and 42.

前面レンズ20において、レンズ本体部40の裏面40bに各リブ41,42を形成しない場合には、シール部50の装着部52の根本部分(レンズ本体部40とシール部50の装着部52とが接続一体化されている部分)が肉厚になるため、その根本部分に対応したレンズ本体部40の表面40aの箇所には、射出成形時に肉ヒケが発生するおそれがある。   In the front lens 20, when the ribs 41 and 42 are not formed on the back surface 40 b of the lens main body portion 40, the root portion of the mounting portion 52 of the seal portion 50 (the lens main body portion 40 and the mounting portion 52 of the seal portion 50 are connected to each other). Since the connection-integrated part) is thick, there is a risk that sink marks may occur at the location of the surface 40a of the lens body 40 corresponding to the root part during injection molding.

それに対して、本実施形態では、レンズ本体部40の裏面40bに各リブ41,42を形成することにより、射出成形時において、シール部50の装着部52の根本部分の肉厚が薄くなるため熱収縮量が小さくなることに加え、各リブ41,42を含めたレンズ本体部40の裏面40bの面剛性が高くなる。
そのため、本実施形態によれば、射出成形時において、シール部50の装着部52の根本部分に対応したレンズ本体部40の表面40aの箇所に肉ヒケが発生するのを防止可能になり、肉ヒケによりレンズ本体部40の表面40aに凹みが形成されないことから、レンズ本体部40の表面40aを平滑に維持できる。
On the other hand, in the present embodiment, by forming the ribs 41 and 42 on the back surface 40b of the lens body 40, the thickness of the base portion of the mounting portion 52 of the seal portion 50 is reduced during injection molding. In addition to a small amount of heat shrinkage, the surface rigidity of the back surface 40b of the lens body 40 including the ribs 41 and 42 is increased.
Therefore, according to the present embodiment, it is possible to prevent the occurrence of flesh sinking at the location of the surface 40a of the lens main body portion 40 corresponding to the root portion of the mounting portion 52 of the seal portion 50 during injection molding. Since the depression does not form on the surface 40a of the lens body 40 due to the sink, the surface 40a of the lens body 40 can be kept smooth.

そして、本実施形態では、射出成形時の肉ヒケによる凹みを目立たなくするためにレンズ本体部40の表面40aにセレーションを形成する方法に比べて、製造コストを低減できる。
従って、本実施形態によれば、射出成形時の肉ヒケによるレンズ本体部40の表面40aの凹みが無く、意匠面である表面40aが平滑で美観に優れた前面レンズ20を低コストに提供できる。
And in this embodiment, compared with the method of forming a serration in the surface 40a of the lens main-body part 40 in order to make the hollow by the sink mark at the time of injection molding inconspicuous, manufacturing cost can be reduced.
Therefore, according to the present embodiment, the front lens 20 can be provided at a low cost without the dent of the surface 40a of the lens body 40 due to flesh sink marks at the time of injection molding, and the surface 40a as the design surface is smooth and excellent in appearance. .

[2]本実施形態では、2個のリブ41,42を備えているため、シール部50の装着部52の根本部分が太く肉厚が大きい場合でも、前記[1]の作用・効果が確実に得られる。   [2] In the present embodiment, since the two ribs 41 and 42 are provided, even when the root portion of the mounting portion 52 of the seal portion 50 is thick and thick, the function and effect of [1] are ensured. Is obtained.

[3]本実施形態において、第1リブ41の底面の中心41aは第1直線La上に配置形成される。第1直線Laは、レンズ本体部40の表面40aに直交すると共に、第1内接円Raの中心Oを通る直線である。第1内接円Raは、シール部50の縦断面内にて、各リブ41,42を設けない場合におけるレンズ本体部40の裏面40cと、シール部50における装着部52の表面(シール部50における積層部51と装着部52の接続部分の表面50a、装着部52の底面52c)とに内接する内接円である。第2リブ42の頂点42aは第2直線Lb上に配置形成される。第2直線Lbは、装着部52の突出方向に対して直交する方向に装着部52を略二分割して、装着部52の突出方向に延びる直線である。第1直線Laと第2直線Lbとは交差し、レンズ本体部40の表面40aに対してシール部50の装着部52が非垂直に突出している。   [3] In the present embodiment, the center 41a of the bottom surface of the first rib 41 is formed on the first straight line La. The first straight line La is a straight line that is orthogonal to the surface 40a of the lens body 40 and passes through the center O of the first inscribed circle Ra. The first inscribed circle Ra includes the back surface 40c of the lens body 40 when the ribs 41 and 42 are not provided in the longitudinal section of the seal portion 50, and the surface of the mounting portion 52 (the seal portion 50). Inscribed circles inscribed in the surface 50a of the connecting portion between the laminated portion 51 and the mounting portion 52 and the bottom surface 52c) of the mounting portion 52. The apex 42a of the second rib 42 is formed on the second straight line Lb. The second straight line Lb is a straight line that extends in the projecting direction of the mounting part 52 by roughly dividing the mounting part 52 in a direction orthogonal to the projecting direction of the mounting part 52. The first straight line La and the second straight line Lb intersect each other, and the mounting portion 52 of the seal portion 50 protrudes non-perpendicularly with respect to the surface 40a of the lens body portion 40.

ここで、第1直線Laと第2直線Lbとが交差する場合には、第1直線Laと交差するレンズ本体部40の表面40aの箇所(第1箇所)と、第2直線Lbと交差するレンズ本体部40の表面40aの箇所(第2箇所)とに肉ヒケが発生するおそれがある。または、前記第1箇所の肉ヒケと前記第2箇所の肉ヒケとが合体し、その合体した大きな肉ヒケが第1箇所および第2箇所を含む広範囲にわたる箇所に発生するおそれがある。
しかし、本実施形態では、各リブ41,42の配置箇所が最適化され、第1直線Laと第2直線Lbとが交差する箇所が、シール部50の装着部52の根本部分になるため、レンズ本体部40の表面40aの前記箇所に肉ヒケが発生するのを防止可能になり、前記[1]の作用・効果が確実に得られる。
Here, when the first straight line La and the second straight line Lb intersect, the position (first position) of the surface 40a of the lens body 40 that intersects the first straight line La intersects the second straight line Lb. There is a possibility that meat sink marks may occur at the location (second location) of the surface 40a of the lens body 40. Alternatively, the meat sink at the first location and the meat sink at the second location may be combined, and the combined large meat sink may occur in a wide range of locations including the first location and the second location.
However, in this embodiment, the location of the ribs 41 and 42 is optimized, and the location where the first straight line La and the second straight line Lb intersect becomes the root portion of the mounting portion 52 of the seal portion 50. It is possible to prevent the occurrence of sink marks at the location on the surface 40a of the lens body 40, and the function / effect [1] can be obtained with certainty.

[4]本実施形態では、シール部50の縦断面内にて、レンズ本体部40の裏面40bと、シール部50の表面50aと、リブ41,42とに内接する複数個の内接円Rb,Rc,Rdについて、各内接円Rb,Rc,Rdの直径の差が少なくなるように、リブ41,42の個数と配置箇所と形状とが設定されている。
このようにすれば、リブ41,42の個数と配置箇所と形状とが全て最適化されるため、前記[1]の作用・効果が確実に得られる。
[4] In the present embodiment, a plurality of inscribed circles Rb inscribed in the back surface 40 b of the lens body 40, the surface 50 a of the seal portion 50, and the ribs 41 and 42 in the longitudinal section of the seal portion 50. , Rc, Rd, the number of ribs 41, 42, the arrangement location, and the shape are set so that the difference in diameter between the inscribed circles Rb, Rc, Rd is reduced.
In this way, since the number of ribs 41 and 42, the arrangement location, and the shape are all optimized, the operation and effect of [1] can be obtained with certainty.

[5]レンズ本体部40が透明であり、シール部50が黒色不透明である場合には、レンズ本体部40の表面40aに肉ヒケによる凹みが形成されると、その凹みが凹レンズとして作用し、その凹みや、その凹みの背後のシール部50が悪目立ちして美観が著しく損なわれる。
しかし、本実施形態では、レンズ本体部40の表面40aが平滑であるため、美観が損なわれるのを防止できる。
そして、前面レンズ20のシール部50が可視光を吸収する黒色不透明であることで、シール部50に被覆された各リブ41,42が外部から見え難くなる。
加えて、ハウジング30を前面レンズ20のシール部50と同系色にすれば、シール部50も外部から見え難くなる。
[5] When the lens body 40 is transparent and the seal part 50 is black and opaque, when a depression due to flesh sink marks is formed on the surface 40a of the lens body 40, the depression acts as a concave lens. The dent and the seal portion 50 behind the dent are conspicuous and the aesthetic appearance is significantly impaired.
However, in this embodiment, since the surface 40a of the lens body 40 is smooth, it is possible to prevent the appearance from being impaired.
And since the seal part 50 of the front lens 20 is black opaque which absorbs visible light, each rib 41 and 42 coat | covered with the seal part 50 becomes difficult to see from the outside.
In addition, if the housing 30 has the same color as the seal portion 50 of the front lens 20, the seal portion 50 is also difficult to see from the outside.

[6]装着部52はフランジ状であり、各リブ41,42は装着部52の形状に対応したリブ状であるため、長尺物である前面レンズ20の長手方向にフランジ状の装着部52を形成した場合でも、前記[1]の作用・効果が確実に得られる。   [6] The mounting portion 52 has a flange shape, and the ribs 41 and 42 have a rib shape corresponding to the shape of the mounting portion 52. Therefore, the mounting portion 52 has a flange shape in the longitudinal direction of the front lens 20 which is a long object. Even when formed, the operation and effect of [1] can be obtained with certainty.

[7]シール部50の積層部51の上端面51aは、レンズ本体部40の上端部43によって被覆されているため、射出成形時にて上端面51aにバリが形成されるのを防止できる。   [7] Since the upper end surface 51a of the laminated portion 51 of the seal portion 50 is covered with the upper end portion 43 of the lens body 40, it is possible to prevent burrs from being formed on the upper end surface 51a during injection molding.

<別の実施形態>
本発明は前記実施形態に限定されるものではなく、以下のように具体化してもよく、その場合でも、前記実施形態と同等もしくはそれ以上の作用・効果を得ることができる。
<Another embodiment>
The present invention is not limited to the above-described embodiment, and may be embodied as follows, and even in that case, operations and effects equivalent to or more than those of the above-described embodiment can be obtained.

[A]前記実施形態ではシール部50を黒色不透明にしているが、不透明であれば黒色に限らず、どのような色にしてもよい。   [A] In the above-described embodiment, the seal portion 50 is black and opaque. However, as long as it is opaque, the seal portion 50 is not limited to black and may have any color.

[B]前記実施形態ではレンズ本体部40とシール部50を同一の合成樹脂材料によって形成しているが、異なる合成樹脂材料によって形成してもよい。   [B] In the above embodiment, the lens body 40 and the seal 50 are formed of the same synthetic resin material, but may be formed of different synthetic resin materials.

[C]前記実施形態では、前面レンズ20のシール部50の装着部52をフランジ状に形成し、各リブ41,42を装着部52の形状に対応したリブ状に形成している。
しかし、装着部52を適宜な形状(例えば、棒状など)の凸部に置き換えると共に、各リブ41,42を装着部52の形状に対応した適宜な形状の突起部に置き換えてもよい。
[C] In the embodiment, the mounting portion 52 of the seal portion 50 of the front lens 20 is formed in a flange shape, and the ribs 41 and 42 are formed in a rib shape corresponding to the shape of the mounting portion 52.
However, the mounting portion 52 may be replaced with a convex portion having an appropriate shape (for example, a rod shape), and the ribs 41 and 42 may be replaced with protrusions having an appropriate shape corresponding to the shape of the mounting portion 52.

[D]前記実施形態では、リブ42の頂点42aが直線Lb上に配置形成されている。
しかし、リブ42の底面の中心が直線Lb上に配置形成されるようにしてもよい。
[D] In the above embodiment, the apex 42a of the rib 42 is formed on the straight line Lb.
However, the center of the bottom surface of the rib 42 may be arranged and formed on the straight line Lb.

本発明は、前記各局面および前記実施形態の説明に何ら限定されるものではない。特許請求の範囲の記載を逸脱せず、当業者が容易に想到できる範囲で種々の変形態様も本発明に含まれる。本明細書の中で明示した公報などの内容は、その全ての内容を援用によって引用することとする。   The present invention is not limited to the description of each aspect and the embodiment. Various modifications are also included in the present invention as long as those skilled in the art can easily conceive without departing from the scope of the claims. The contents of publications and the like specified in the present specification are all incorporated by reference.

20…前面レンズ(樹脂成形品)
40…レンズ本体部(一次成形品)
50…シール部(二次成形品)
50a…シール部50の表面
40a…レンズ本体部40の表面
40b…レンズ本体部40の裏面
40c…リブ41,42を設けない場合におけるレンズ本体部40の裏面
41,42…リブ(突起部)
41…第1突起部
42…第2突起部
41a…リブ41の底面の中心
42a…リブ42の頂点
52…装着部(凸部)
La…第1直線
Lb…第2直線
Ra…第1内接円
Rb,Rc,Rd…内接円(複数個の内接円)
20 ... Front lens (resin molded product)
40 ... Lens body (primary molded product)
50 ... Seal part (secondary molded product)
50a ... Front surface 40a of the seal portion 50 ... Front surface 40b of the lens body portion 40 ... Back surface 40c of the lens body portion 40 ... Back surfaces 41, 42 of the lens body portion 40 when the ribs 41, 42 are not provided ... Ribs (projections)
41 ... 1st projection part 42 ... 2nd projection part 41a ... Center 42a of the bottom face of the rib 41 ... Vertex 52 of the rib 42 ... Mounting part (convex part)
La ... 1st straight line Lb ... 2nd straight line Ra ... 1st inscribed circle Rb, Rc, Rd ... Inscribed circle (a plurality of inscribed circles)

Claims (7)

ダブルモールドにより射出成形されて一体化された一次成形品と二次成形品とを備えた樹脂成形品であって、
前記二次成形品の表面には凸部が形成され、その凸部は前記樹脂成形品の裏面側へ突出し、
意匠面である前記一次成形品の表面は平滑であり、前記一次成形品の裏面にて前記凸部に対応する箇所には突起部が形成され、
前記二次成形品は前記突起部を含めた前記一次成形品の裏面を被覆する樹脂成形品。
A resin molded product comprising a primary molded product and a secondary molded product, which are integrated by injection molding with a double mold,
A convex portion is formed on the surface of the secondary molded product, and the convex portion projects to the back side of the resin molded product,
The surface of the primary molded product that is a design surface is smooth, and a protrusion is formed at a position corresponding to the convex portion on the back surface of the primary molded product,
The secondary molded product is a resin molded product that covers the back surface of the primary molded product including the protrusions.
前記突起部を複数個備えた、請求項1に記載の樹脂成形品。   The resin molded product according to claim 1, comprising a plurality of the protrusions. 前記突起部として第1突起部と第2突起部とを備え、
前記第1突起部の底面の中心は第1直線上に配置形成され、
前記第1直線は、前記一次成形品の表面に直交すると共に、第1内接円の中心を通る直線であり、
前記第1内接円は、前記二次成形品の断面内にて、前記突起部を設けない場合における前記一次成形品の裏面と、前記二次成形品における前記凸部の表面とに内接する内接円であり、
前記第2突起部の頂点は第2直線上に配置形成され、
前記第2直線は、前記凸部の突出方向に対して直交する方向に前記凸部を略二分割して、前記凸部の突出方向に延びる直線であり、
前記第1直線と前記第2直線とが交差する、
請求項2に記載の樹脂成形品。
A first protrusion and a second protrusion as the protrusion;
The center of the bottom surface of the first protrusion is disposed on the first straight line,
The first straight line is a straight line that is orthogonal to the surface of the primary molded product and passes through the center of the first inscribed circle,
The first inscribed circle is inscribed in the cross-section of the secondary molded product, on the back surface of the primary molded product when the projection is not provided, and on the surface of the convex portion in the secondary molded product. An inscribed circle,
The apex of the second protrusion is arranged on the second straight line,
The second straight line is a straight line extending in the projecting direction of the convex part by roughly dividing the convex part in a direction orthogonal to the projecting direction of the convex part,
The first straight line and the second straight line intersect.
The resin molded product according to claim 2.
前記二次成形品の断面内にて、前記一次成形品の裏面と、前記二次成形品の表面と、前記突起部とに内接する複数個の内接円について、それら複数個の内接円の直径の差が少なくなるように、前記突起部の個数と配置箇所と形状とが設定されている、
請求項2または請求項3に記載の樹脂成形品。
In the cross section of the secondary molded product, a plurality of inscribed circles inscribed in the back surface of the primary molded product, the surface of the secondary molded product, and the protrusions, the plurality of inscribed circles The number of the protrusions, the arrangement location and the shape are set so that the difference in diameter of the
The resin molded product according to claim 2 or claim 3.
前記一次成形品は透明であり、前記二次成形品は不透明である、
請求項1〜4のいずれか一項に記載の樹脂成形品。
The primary molded article is transparent and the secondary molded article is opaque;
The resin molded product according to any one of claims 1 to 4.
前記凸部はフランジ状であり、前記突起部は前記凸部の形状に対応したリブ状である、
請求項1〜5のいずれか一項に記載の樹脂成形品。
The convex portion has a flange shape, and the protruding portion has a rib shape corresponding to the shape of the convex portion.
The resin molded product according to any one of claims 1 to 5.
前記二次成形品の端面は前記一次成形品によって被覆されている、
請求項1〜6のいずれか一項に記載の樹脂成形品。
The end surface of the secondary molded product is covered with the primary molded product,
The resin molded product according to any one of claims 1 to 6.
JP2014002258A 2014-01-09 2014-01-09 Resin molded product Expired - Fee Related JP6090177B2 (en)

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2018066706A (en) * 2016-10-21 2018-04-26 豊田合成株式会社 Decorative component for vehicle and method for manufacturing the same

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH1177740A (en) * 1997-09-17 1999-03-23 Toyota Autom Loom Works Ltd Resin molded article, manufacture thereof, and molding tool therefor

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH1177740A (en) * 1997-09-17 1999-03-23 Toyota Autom Loom Works Ltd Resin molded article, manufacture thereof, and molding tool therefor

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2018066706A (en) * 2016-10-21 2018-04-26 豊田合成株式会社 Decorative component for vehicle and method for manufacturing the same

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