JP2010201745A - Method of manufacturing resin molded product, resin molded product, resin molded product unit - Google Patents

Method of manufacturing resin molded product, resin molded product, resin molded product unit Download PDF

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JP2010201745A
JP2010201745A JP2009048793A JP2009048793A JP2010201745A JP 2010201745 A JP2010201745 A JP 2010201745A JP 2009048793 A JP2009048793 A JP 2009048793A JP 2009048793 A JP2009048793 A JP 2009048793A JP 2010201745 A JP2010201745 A JP 2010201745A
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resin
light
layer
resin layer
light shielding
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JP5498034B2 (en
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Tadayori Terauchi
忠頼 寺内
Norio Terauchi
範郎 寺内
Hiroyuki Yamazaki
裕行 山崎
Makiko Sotokawa
麻紀子 外川
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Priority to PCT/JP2010/052333 priority patent/WO2010101021A1/en
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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C45/00—Injection moulding, i.e. forcing the required volume of moulding material through a nozzle into a closed mould; Apparatus therefor
    • B29C45/0053—Injection moulding, i.e. forcing the required volume of moulding material through a nozzle into a closed mould; Apparatus therefor combined with a final operation, e.g. shaping
    • B29C45/0055—Shaping
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C39/00—Shaping by casting, i.e. introducing the moulding material into a mould or between confining surfaces without significant moulding pressure; Apparatus therefor
    • B29C39/02—Shaping by casting, i.e. introducing the moulding material into a mould or between confining surfaces without significant moulding pressure; Apparatus therefor for making articles of definite length, i.e. discrete articles
    • B29C39/021—Shaping by casting, i.e. introducing the moulding material into a mould or between confining surfaces without significant moulding pressure; Apparatus therefor for making articles of definite length, i.e. discrete articles by casting in several steps
    • B29C39/023—Shaping by casting, i.e. introducing the moulding material into a mould or between confining surfaces without significant moulding pressure; Apparatus therefor for making articles of definite length, i.e. discrete articles by casting in several steps for making multicoloured articles
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C39/00—Shaping by casting, i.e. introducing the moulding material into a mould or between confining surfaces without significant moulding pressure; Apparatus therefor
    • B29C39/02—Shaping by casting, i.e. introducing the moulding material into a mould or between confining surfaces without significant moulding pressure; Apparatus therefor for making articles of definite length, i.e. discrete articles
    • B29C39/021—Shaping by casting, i.e. introducing the moulding material into a mould or between confining surfaces without significant moulding pressure; Apparatus therefor for making articles of definite length, i.e. discrete articles by casting in several steps
    • B29C39/025—Shaping by casting, i.e. introducing the moulding material into a mould or between confining surfaces without significant moulding pressure; Apparatus therefor for making articles of definite length, i.e. discrete articles by casting in several steps for making multilayered articles
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C45/00—Injection moulding, i.e. forcing the required volume of moulding material through a nozzle into a closed mould; Apparatus therefor
    • B29C45/14—Injection moulding, i.e. forcing the required volume of moulding material through a nozzle into a closed mould; Apparatus therefor incorporating preformed parts or layers, e.g. injection moulding around inserts or for coating articles
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C45/00—Injection moulding, i.e. forcing the required volume of moulding material through a nozzle into a closed mould; Apparatus therefor
    • B29C45/16—Making multilayered or multicoloured articles
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C45/00—Injection moulding, i.e. forcing the required volume of moulding material through a nozzle into a closed mould; Apparatus therefor
    • B29C45/0053—Injection moulding, i.e. forcing the required volume of moulding material through a nozzle into a closed mould; Apparatus therefor combined with a final operation, e.g. shaping
    • B29C45/0055—Shaping
    • B29C2045/0058—Shaping removing material
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29K—INDEXING SCHEME ASSOCIATED WITH SUBCLASSES B29B, B29C OR B29D, RELATING TO MOULDING MATERIALS OR TO MATERIALS FOR MOULDS, REINFORCEMENTS, FILLERS OR PREFORMED PARTS, e.g. INSERTS
    • B29K2995/00—Properties of moulding materials, reinforcements, fillers, preformed parts or moulds
    • B29K2995/0018—Properties of moulding materials, reinforcements, fillers, preformed parts or moulds having particular optical properties, e.g. fluorescent or phosphorescent
    • B29K2995/0025—Opaque
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29K—INDEXING SCHEME ASSOCIATED WITH SUBCLASSES B29B, B29C OR B29D, RELATING TO MOULDING MATERIALS OR TO MATERIALS FOR MOULDS, REINFORCEMENTS, FILLERS OR PREFORMED PARTS, e.g. INSERTS
    • B29K2995/00—Properties of moulding materials, reinforcements, fillers, preformed parts or moulds
    • B29K2995/0018—Properties of moulding materials, reinforcements, fillers, preformed parts or moulds having particular optical properties, e.g. fluorescent or phosphorescent
    • B29K2995/0026—Transparent
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29L—INDEXING SCHEME ASSOCIATED WITH SUBCLASS B29C, RELATING TO PARTICULAR ARTICLES
    • B29L2031/00—Other particular articles
    • B29L2031/46—Knobs or handles, push-buttons, grips
    • B29L2031/466—Keypads, keytops

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Manufacturing & Machinery (AREA)
  • Injection Moulding Of Plastics Or The Like (AREA)
  • Manufacture Of Switches (AREA)
  • Push-Button Switches (AREA)

Abstract

<P>PROBLEM TO BE SOLVED: To manufacture a resin molded product having exterior display parts regardless of a distance between adjacent exterior display parts and sizes of the exterior display parts. <P>SOLUTION: A light transmissive resin layer 120 having a concave part 121 on its back face is molded by injection molding of light transmissive resin by using a predetermined die. Next, light-shielding resin is poured into the predetermined die so as to fill at least the concave part 121 with the light shielding resin for injection-molding a light-shielding resin layer 160 which is a layer made of the light-shielding resin on the back face of the light transmissive resin layer 120. After injection-molding the light-shielding resin layer 160, the light-shielding resin layer 160 other than a light-shielding resin part 130 or the light transmissive resin layer 120 is cut, which produces the resin molded product having the exterior display parts 110. <P>COPYRIGHT: (C)2010,JPO&INPIT

Description

本発明は、樹脂成型物製造方法、樹脂成型物、樹脂成型物ユニットに関する。   The present invention relates to a resin molded product manufacturing method, a resin molded product, and a resin molded product unit.

従来、図６に示すようなキートップがあった。図６（ａ）に示すキートップ６００は、光透過性樹脂により射出成型された光透過性樹脂部６１０の背面横側に、光遮蔽性樹脂で射出成型して光遮蔽性樹脂部６２０を形成させた構造になっている。そして、さらに光透過性樹脂部６１０の表面全体を塗装して塗装面６３０が形成されている。塗装面６３０の上側からレーザーで印字することにより、キートップ６００はキートップ表面に所望の表示を形成している。   Conventionally, there has been a key top as shown in FIG. The key top 600 shown in FIG. 6A is formed by injection molding with a light shielding resin on the back side of the light transmitting resin portion 610 injection molded with a light transmitting resin to form a light shielding resin portion 620. The structure is Further, the entire surface of the light transmissive resin portion 610 is painted to form a painted surface 630. By printing with a laser from the upper side of the painted surface 630, the key top 600 forms a desired display on the key top surface.

しかしながら、キートップ６００は、塗装面６３０の上側からレーザーで印字しているため、外部に表示すべき文字等を鮮明にすることができるが、表面に細かな凹凸ができるため表面の塗装面６３０が剥がれ易く、その結果外部に表示すべき文字等までなくなってしまう可能性が高いという問題点があった。また、キートップ６００に塗料を用いて塗装面６３０を形成することは、環境問題が重要な現在において好ましくない。   However, since the key top 600 is printed with a laser from the upper side of the painted surface 630, characters and the like to be displayed on the outside can be made clear, but since the surface has fine irregularities, the painted surface 630 on the surface is formed. As a result, there is a high possibility that characters that should be displayed outside are likely to disappear. In addition, it is not preferable to form the painted surface 630 using a paint on the key top 600 at the present time when environmental problems are important.

以上のような問題を解決するものとして、以下に示す二色成型方法により成型されたキートップがあった（例えば、特許文献１参照。）。その二色成型方法とは、ファ−ストショットで文字以外の部分を光透過性樹脂で射出成形し、セカンドショットで文字部分を光遮蔽性樹脂で射出成形し、光透過性樹脂成形部分によって光遮蔽性樹脂成形部分が包囲されているキートップの二色成形方法であって、ファーストショットにおいて、光透過性樹脂成形部分内に光遮蔽性樹脂成形部分が成形されるべき空間を背面側に開口させて所要高さに形成し、セカンドショットにおいて、一方の金型に収容した光透過性樹脂成形部分の成形用空間に、他方の金型に設けた狭隘な流路を通じて光遮蔽性樹脂を充填し、その流路内の光遮蔽性樹脂の分断用部分を付け根付近で切断することを特徴とするものである。   As a solution to the above problems, there has been a key top molded by the following two-color molding method (see, for example, Patent Document 1). In the two-color molding method, a portion other than characters is injection-molded with a light-transmitting resin in a first shot, a character portion is injection-molded with a light-shielding resin in a second shot, and light is transmitted by the light-transmitting resin molded portion. A key top two-color molding method in which the shielding resin molding part is surrounded, and in the first shot, a space in which the light shielding resin molding part is to be molded is opened in the back side in the light transmitting resin molding part. In the second shot, the light-shielding resin is filled into the molding space of the light-transmitting resin molding part accommodated in one mold through the narrow flow path provided in the other mold. And the part for parting of the light shielding resin in the flow path is cut in the vicinity of the root.

一方、従来からあるキートップのうち図６（ｂ）に示すキートップ６５０は、光透過性樹脂により射出成型された光透過性樹脂部６６０の上側に、光遮蔽性樹脂で射出成型して光遮蔽性樹脂部６７０を形成させた構造になっている。そして、外部に対する表示部分を形成する外部表示形成部６６０ａおよび６６０ｂは、光遮蔽性樹脂部６７０にクサビとして打ち込まれたようなクサビ形状になっている。   On the other hand, a key top 650 shown in FIG. 6 (b) among conventional key tops is formed by injection molding with a light shielding resin on the upper side of a light transmissive resin portion 660 which is injection molded with a light transmissive resin. The shielding resin portion 670 is formed. And the external display formation parts 660a and 660b which form the display part with respect to the outside have a wedge shape that is driven into the light shielding resin part 670 as a wedge.

特開平０６−２２６７７９号公報Japanese Patent Application Laid-Open No. 06-226779

しかしながら、上記二色成型方法には以下に示す問題点がある。上記二色成型方法を示す図である図７を参照してその問題点を説明する。まず、一つ目の問題点は、外部に表示すべき文字等が複数あって隣り合う文字等の間隔が近い場合、上記二色成型方法を用いて外部に表示すべき文字等を成型することが困難であることである。   However, the two-color molding method has the following problems. The problem will be described with reference to FIG. 7 showing the two-color molding method. First, the first problem is that when there are multiple characters to be displayed externally and the distance between adjacent characters is close, the character to be displayed externally is molded using the above two-color molding method. Is difficult.

例えば、図７に示すように光透過性樹脂成形部分７１０の背面に形成された文字空間部７１１および７１２のように隣り合う間隔が近い場合、上記二色成型方法では文字空間部７１１および７１２へ光遮蔽性樹脂を流し込むための金型の流路７２１および７２２が干渉してしまう（図７の楕円領域Ｄを参照）。このため、隣り合う文字等の間隔が近い場合、上記二色成型方法を用いて外部に表示すべき文字等を成型することが困難である。   For example, as shown in FIG. 7, when the adjacent spaces are close like the character space portions 711 and 712 formed on the back surface of the light-transmitting resin molded portion 710, the two-color molding method moves to the character space portions 711 and 712. The mold flow paths 721 and 722 for pouring the light shielding resin interfere with each other (see the elliptical region D in FIG. 7). For this reason, when the distance between adjacent characters or the like is close, it is difficult to form characters or the like to be displayed outside using the two-color molding method.

また、二つ目の問題点は、図７に示すように光透過性樹脂成形部分７１０の背面に形成された文字空間部７１３のように文字そのものが小さい場合、上記二色成型方法では金型の流路７２３から光遮蔽性樹脂を流し込んだ後に金型の流路７２３に伸びる光遮蔽性樹脂を切断しようとすると、文字空間部７１３に流し込んだ光遮蔽性樹脂も一緒に剥がれ落ちてしまう可能性があることである。以上の２つの問題点を解決できれば、キートップの製造の幅が広がる。   The second problem is that when the character itself is small like the character space portion 713 formed on the back surface of the light-transmitting resin molded portion 710 as shown in FIG. If the light shielding resin extending into the mold flow path 723 is cut after flowing the light shielding resin from the flow path 723, the light shielding resin poured into the character space portion 713 may be peeled off together. It is to have sex. If the above two problems can be solved, the range of key top manufacturing will be expanded.

また、図６（ｂ）に示すキートップ６５０は、以下に示す問題点がある。キートップ６５０の背面から光源６８０で照光した場合、外部表示形成部６６０ａおよび６６０ｂがクサビ形状になっているため、例えば外部表示形成部６６０ａおよび６６０ｂの脇の光遮蔽性樹脂部６７０ａ乃至６７０ｄの層の薄い部分から光が漏れて外部表示形成部６６０ａおよび６６０ｂにより形成された文字の輪郭の外側が明るくなり、その結果、外部表示形成部６６０ａおよび６６０ｂの輪郭がぼやける。外部表示形成部６６０ａおよび６６０ｂの輪郭がぼやけると、外部に表示すべき文字等が不鮮明になる。外部に表示すべき文字等が不鮮明なキートップは好ましくない。   Further, the key top 650 shown in FIG. 6B has the following problems. When illuminated by the light source 680 from the back surface of the key top 650, the external display forming portions 660a and 660b have a wedge shape. The light leaks from the thin part of the screen, and the outside of the outline of the character formed by the external display forming portions 660a and 660b becomes bright. As a result, the outline of the external display forming portions 660a and 660b is blurred. When the outlines of the external display forming portions 660a and 660b are blurred, characters to be displayed on the outside become unclear. Key tops with unclear characters or the like to be displayed outside are not preferable.

そこで、本発明は、隣り合う外部表示部分の間隔や外部表示部分の大きさに関係なく、外部表示部分を有する樹脂成型物を製造することができる樹脂成型物製造方法、およびその製造方法により製造された樹脂成型物、並びに樹脂成型物を用いた樹脂成型物ユニットを提供することを目的とする。   Accordingly, the present invention provides a resin molded product manufacturing method capable of manufacturing a resin molded product having an external display portion regardless of the interval between adjacent external display portions and the size of the external display portion, and the manufacturing method thereof. It is an object of the present invention to provide a molded resin product and a resin molded product unit using the molded resin product.

本発明は、上記課題を解決するためになされたものであり、本発明の樹脂成型物製造方法は、背面側に外部に表示させるべき外部表示部分に対応する凹部、および上記外部表示部分以外の部分に対応する凹部の両方、またはいずれか一方を有するよう光透過性樹脂により成型された層である光透過性樹脂層と、それぞれの上記凹部内を光遮蔽性樹脂により充填した光遮蔽性樹脂部とを備えた樹脂成型物を製造する樹脂成型物製造方法であって、上記光透過性樹脂層を成型する光透過性樹脂層成型工程と、少なくとも上記それぞれの凹部内を上記光遮蔽性樹脂で充填させるよう上記光遮蔽性樹脂を流し込んで上記光透過性樹脂層の背面に光遮蔽性樹脂の層である光遮蔽性樹脂層を成型する光遮蔽性樹脂層成型工程と、上記光遮蔽性樹脂部以外の上記光遮蔽性樹脂層、または上記光遮蔽性樹脂部以外の上記光遮蔽性樹脂層および上記光透過性樹脂層を切削する切削工程とを具備することを特徴とするものである。これにより、隣り合う外部表示部分の間隔や外部表示部分の大きさに関係なく、外部表示部分を有する樹脂成型物を製造させるという作用をもたらす。   The present invention has been made to solve the above problems, and the resin molded product manufacturing method of the present invention includes a recess corresponding to an external display portion to be displayed externally on the back side, and a portion other than the external display portion. A light-transmitting resin layer that is a layer formed of a light-transmitting resin so as to have both or one of the recesses corresponding to the portion, and a light-blocking resin in which the respective recesses are filled with the light-blocking resin A resin molded product manufacturing method for manufacturing a resin molded product provided with a portion, wherein the light transmissive resin layer molding step for molding the light transmissive resin layer, and at least the inside of each recess is the light shielding resin. A light shielding resin layer molding step of casting the light shielding resin so as to be filled in and molding a light shielding resin layer as a light shielding resin layer on the back surface of the light transmissive resin layer; and the light shielding property Other than resin part Serial light-shielding resin layer, or is characterized in that it comprises a cutting step of cutting the light-shielding resin layer and the light-transmitting resin layer other than the light-shielding resin portion. Thereby, regardless of the interval between the adjacent external display portions and the size of the external display portion, an effect of producing a resin molded product having the external display portion is brought about.

また、本発明の樹脂成型物製造方法において、上記光透過性樹脂層成型工程において上記光透過性樹脂層を透明樹脂により成型し、上記切削工程後に、上記光透過性樹脂層の背面側に色を有する層である有色層を少なくとも１つ形成する有色層形成工程をさらに具備することを特徴とする。これにより、樹脂成型物の外部表示部分をカラフルにさせるという作用をもたらす。   Further, in the resin molded product manufacturing method of the present invention, the light transmissive resin layer is molded with a transparent resin in the light transmissive resin layer molding step, and a color is formed on the back side of the light transmissive resin layer after the cutting step. It further comprises a colored layer forming step of forming at least one colored layer that is a layer having a color. Thereby, the effect | action of making the external display part of a resin molding colorful is brought about.

また、本発明の樹脂成型物製造方法は、背面側に外部に表示させるべき外部表示部分に対応する凹部、および上記外部表示部分以外の部分に対応する凹部の両方、またはいずれか一方を有するよう光透過性樹脂により成型された層である光透過性樹脂層と、それぞれの上記凹部内を光遮蔽性樹脂により充填した光遮蔽性樹脂部とを備えた樹脂成型物を製造する樹脂成型物製造方法であって、それぞれの上記凹部に対応する凸部を表面に有するように光遮蔽性樹脂により成型された層である光遮蔽性樹脂層を成型する光遮蔽性樹脂層成型工程と、上記光透過性樹脂を流し込んで上記光遮蔽性樹脂層の表面に光透過性樹脂の層である光透過性樹脂層を成型する光透過性樹脂層成型工程と、上記光遮蔽性樹脂部以外の上記光遮蔽性樹脂層、または上記光遮蔽性樹脂部以外の上記光遮蔽性樹脂層および上記光透過性樹脂層を切削する切削工程とを具備することを特徴とするものである。これにより、隣り合う外部表示部分の間隔や外部表示部分の大きさに関係なく、外部表示部分を有する樹脂成型物を製造させるという作用をもたらす。   Moreover, the resin molded product manufacturing method of the present invention has both or either one of a concave portion corresponding to an external display portion to be externally displayed on the back side and a concave portion corresponding to a portion other than the external display portion. Resin molded product manufacturing for manufacturing a resin molded product comprising a light transmissive resin layer, which is a layer molded from a light transmissive resin, and a light shielding resin portion in which each of the recesses is filled with a light shielding resin A light shielding resin layer molding step of molding a light shielding resin layer, which is a layer molded with a light shielding resin so as to have convex portions corresponding to the respective concave portions on the surface, and the light A light-transmitting resin layer molding step of casting a light-transmitting resin to mold a light-transmitting resin layer, which is a light-transmitting resin layer, on the surface of the light-blocking resin layer, and the light other than the light-blocking resin portion Shielding resin layer or above It is characterized in that it comprises a cutting step the light-shielding resin layer other than the light-shielding resin portion and for cutting the light-transmitting resin layer. Thereby, regardless of the interval between the adjacent external display portions and the size of the external display portion, an effect of producing a resin molded product having the external display portion is brought about.

また、本発明の樹脂成型物は、背面側に外部に表示させるべき外部表示部分以外の部分に対応する凹部を有するよう光透過性樹脂により成型された層である光透過性樹脂層と、上記凹部内を光遮蔽性樹脂により充填した光遮蔽性樹脂部とを備え、上記凹部は、上記光透過性樹脂層に対して略直角方向に等幅で設けられたことを特徴とするものである。これにより、樹脂成型物の外部表示部分を鮮明にさせ、かつ樹脂成型物の外部表示部分を十分に保護させるという作用をもたらす。   In addition, the resin molded product of the present invention includes a light transmissive resin layer, which is a layer formed of a light transmissive resin so as to have a recess corresponding to a portion other than an external display portion to be displayed on the back side, and the above A light-shielding resin portion filled with a light-shielding resin, and the recess is provided with a uniform width in a direction substantially perpendicular to the light-transmitting resin layer. . This brings about the effect that the external display part of the resin molding is made clear and the external display part of the resin molding is sufficiently protected.

また、本発明の樹脂成型物において、上記光透過性樹脂層の背面側に色を有する層である有色層を少なくとも１つさらに備えたことを特徴とする。これにより、樹脂成型物の外部表示部分をカラフルにさせるという作用をもたらす。   In the resin molded product of the present invention, at least one colored layer which is a color layer is further provided on the back side of the light transmissive resin layer. Thereby, the effect | action of making the external display part of a resin molding colorful is brought about.

また、本発明の樹脂成型物ユニットは、背面側に外部に表示させるべき外部表示部分以外の部分に対応する凹部を有するよう光透過性樹脂により成型された層である光透過性樹脂層と、上記凹部内を光遮蔽性樹脂により充填した光遮蔽性樹脂部と、上記光透過性樹脂層の背面側に位置し、上記外部表示部分を背面側から照光する光源とを備え、上記凹部は、上記光透過性樹脂層に対して略直角方向に等幅で設けられたことを特徴とするものである。これにより、樹脂成型物の外部表示部分を鮮明にさせ、かつ樹脂成型物の外部表示部分を十分に保護させるという作用をもたらす。   In addition, the resin molded product unit of the present invention is a light transmissive resin layer that is a layer formed of a light transmissive resin so as to have a recess corresponding to a portion other than an external display portion to be displayed on the back side, A light shielding resin portion filled with a light shielding resin in the recess, and a light source that is located on the back side of the light transmissive resin layer and illuminates the external display portion from the back side. The light-transmitting resin layer is provided with a uniform width in a direction substantially perpendicular to the light-transmitting resin layer. This brings about the effect that the external display part of the resin molding is made clear and the external display part of the resin molding is sufficiently protected.

本発明によれば、隣り合う外部表示部分の間隔や外部表示部分の大きさに関係なく外部表示部分を有する樹脂成型物を製造することができるという優れた効果を奏する。また、本発明によれば、樹脂成型物に塗料を用いないため、環境問題に資するという優れた効果を奏する。   According to the present invention, there is an excellent effect that a resin molded product having an external display portion can be manufactured regardless of the interval between adjacent external display portions and the size of the external display portion. Moreover, according to this invention, since a coating material is not used for a resin molding, there exists the outstanding effect of contributing to an environmental problem.

本発明の実施の形態における樹脂成型物１００の一構成例を示す図である。It is a figure which shows one structural example of the resin molding 100 in embodiment of this invention. 本発明の実施の形態における樹脂成型物１００を用いた樹脂成型物ユニット２００の一構成例を示す図である。It is a figure which shows one structural example of the resin molded product unit 200 using the resin molded product 100 in embodiment of this invention. 本発明の実施の形態における樹脂成型物１００の製造方法を示す図である。It is a figure which shows the manufacturing method of the resin molding 100 in embodiment of this invention. 本発明の別の実施の形態における樹脂成型物１００の製造方法を示す図である。It is a figure which shows the manufacturing method of the resin molding 100 in another embodiment of this invention. 外部表示部分が光透過性樹脂層で表された部分（樹脂成型物１００に相当するもの）、および外部表示部分が光遮蔽性樹脂部で表された部分の両方が含まれた樹脂成型物５００の製造方法を示す図である。Resin molded product 500 including both a portion in which the external display portion is represented by a light-transmitting resin layer (corresponding to resin molded product 100) and a portion in which the external display portion is represented by a light shielding resin portion. It is a figure which shows this manufacturing method. 従来のキートップを示す図である。It is a figure which shows the conventional key top. 従来の二色成型方法を示す図である。It is a figure which shows the conventional two-color molding method.

次に本発明の実施の形態について図面を参照して詳細に説明する。   Next, embodiments of the present invention will be described in detail with reference to the drawings.

図１は、本発明の実施の形態における樹脂成型物１００の一構成例を示す図である。本発明の樹脂成型物１００は、外部に表示させる表示部分である外部表示部分（以下、外部表示部分と呼ぶこととする。）を有する樹脂成型物であり、外側表面には、光透過性樹脂により成型された光透過性樹脂層があり、その光透過性樹脂層の背面側には、光遮蔽性樹脂により成型された光遮蔽性樹脂部がある。光透過性樹脂層の背面側に適切に光遮蔽性樹脂部を配することにより上記外部表示部分を形成している。   FIG. 1 is a diagram illustrating a configuration example of a resin molded product 100 according to an embodiment of the present invention. The resin molded product 100 of the present invention is a resin molded product having an external display portion (hereinafter referred to as an external display portion) that is a display portion to be displayed on the outside, and a light-transmitting resin is provided on the outer surface. There is a light-transmitting resin layer molded by the method, and a light-blocking resin portion molded by a light-blocking resin is provided on the back side of the light-transmitting resin layer. The external display part is formed by appropriately arranging a light shielding resin part on the back side of the light transmissive resin layer.

図１（ａ）は、樹脂成型物１００の斜視図である。樹脂成型物１００は、図１（ａ）に示すように箱型形状をしており、その中央部に外部表示部分１１０として、文字「Ｈ」を有している。なお、樹脂成型物１００の形状は箱型形状に限るものではなく、その他の形状であってもよい。また、外部表示部分１１０は、文字「Ｈ」のように１文字ではなく、複数の文字であってもよいし、記号その他の表示であってもよい。すなわち、外部表示部分１１０は、どのような表示であってもよい。   FIG. 1A is a perspective view of a resin molded product 100. The resin molded product 100 has a box shape as shown in FIG. 1A, and has a letter “H” as an external display portion 110 at the center thereof. The shape of the resin molded product 100 is not limited to the box shape, but may be other shapes. Further, the external display portion 110 may be a plurality of characters instead of a single character such as the character “H”, or may be a symbol or other display. That is, the external display portion 110 may be any display.

上記説明した光透過性樹脂層や光遮蔽性樹脂部を図１（ａ）において図示することは、困難であるため、光透過性樹脂層や光遮蔽性樹脂部を図１（ａ）における樹脂成型物１００のＢ−Ｂ断面図で以下説明する。   Since it is difficult to illustrate the light transmissive resin layer and the light shielding resin portion described above in FIG. 1A, the light transmissive resin layer and the light shielding resin portion are the resin in FIG. This will be described below with reference to a cross-sectional view of the molded product 100 taken along the line BB.

図１（ｂ）は、図１（ａ）における樹脂成型物１００のＢ−Ｂ断面図である。樹脂成型物１００は、光透過性樹脂層１２０と、光遮蔽性樹脂部１３０と、有色層１４０とを備える。   FIG.1 (b) is BB sectional drawing of the resin molding 100 in Fig.1 (a). The resin molded product 100 includes a light transmissive resin layer 120, a light shielding resin portion 130, and a colored layer 140.

光透過性樹脂層１２０は、背面側に外部表示部分１１０以外の部分に対応する凹部１２１を有するよう光透過性樹脂により成型された層である。光透過性樹脂として、例えばポリカーボネートが想定されるが、これに限るものではない。また、光透過性樹脂層１２０の色は、透明とすることが想定されるが、これに限るものではない。   The light transmissive resin layer 120 is a layer formed of a light transmissive resin so as to have a recess 121 corresponding to a portion other than the external display portion 110 on the back side. For example, polycarbonate is assumed as the light-transmitting resin, but is not limited thereto. Moreover, although the color of the light transmissive resin layer 120 is assumed to be transparent, it is not limited to this.

樹脂成型物１００の形状を箱型形状とした場合、光透過性樹脂層１２０は、上面部１２２と四方の側面部１２３乃至１２６とから構成される。そして、上面部１２２の背面側および側面部１２３乃至１２６の背面側に凹部１２１が形成されている。   When the shape of the resin molding 100 is a box shape, the light transmissive resin layer 120 includes an upper surface portion 122 and four side surface portions 123 to 126. And the recessed part 121 is formed in the back side of the upper surface part 122, and the back side of the side parts 123 thru | or 126.

凹部１２１は、外部表示部分１１０以外の部分に対応する部分である。図１（ｂ）において凹部１２１は、文字「Ｈ」を構成する部分以外の部分に対応する。そして、図１（ｂ）において凹部１２１は、５つの凹部から成り立っていると見ることができる。すなわち、図１（ｂ）において凹部１２１は、凹部１２１ａ乃至凹部１２１ｅの５つの凹部から成り立っていると見ることができる。   The recess 121 is a part corresponding to a part other than the external display part 110. In FIG. 1B, the recess 121 corresponds to a portion other than the portion constituting the character “H”. And in FIG.1 (b), it can be seen that the recessed part 121 consists of five recessed parts. That is, in FIG. 1B, it can be seen that the recess 121 is composed of five recesses 121a to 121e.

凹部１２１ａ乃至凹部１２１ｃは、上面部１２２の背面側に設けられた凹部であり、外部表示部分１１０としてどのような表示を形成させるかによって決定される凹部である。なお、図１（ｂ）に示した断面図は、図１（ａ）における文字「Ｈ」の下の方の位置における断面図であるため、上面部１２２の背面側に凹部が３つある。凹部の数や位置は、断面図として見る限り断面の位置により変わってくる。   The recesses 121 a to 121 c are recesses provided on the back side of the upper surface part 122, and are determined by what kind of display is formed as the external display part 110. 1B is a cross-sectional view at a position below the letter “H” in FIG. 1A, and thus there are three concave portions on the back side of the upper surface portion 122. The number and position of the recesses vary depending on the position of the cross section as viewed as a cross-sectional view.

また、凹部１２１ａ乃至凹部１２１ｃは、光透過性樹脂層１２０の上面部１２２に対して直角方向Ｆへ等幅で伸びている。すなわち、凹部１２１ａは、図１（ｂ）に示すように光透過性樹脂層１２０の上面部１２２に対して直角方向Ｆへ等幅Ｄ１で伸びている。また、凹部１２１ｂは、図１（ｂ）に示すように光透過性樹脂層１２０の上面部１２２に対して直角方向Ｆへ等幅Ｄ２で伸びている。凹部１２１ｃは、図１（ｂ）に示すように光透過性樹脂層１２０の上面部１２２に対して直角方向Ｆへ等幅Ｄ３で伸びている。   Further, the recesses 121 a to 121 c extend with a uniform width in the direction F perpendicular to the upper surface portion 122 of the light transmissive resin layer 120. That is, the recess 121a extends with a uniform width D1 in the direction F perpendicular to the upper surface portion 122 of the light-transmitting resin layer 120 as shown in FIG. Moreover, the recessed part 121b is extended with the equal width D2 to the orthogonal | vertical direction F with respect to the upper surface part 122 of the light transmissive resin layer 120, as shown in FIG.1 (b). As shown in FIG. 1B, the recess 121c extends with a uniform width D3 in the direction F perpendicular to the upper surface portion 122 of the light-transmitting resin layer 120.

凹部１２１ａ乃至凹部１２１ｃを光透過性樹脂層１２０の上面部１２２に対して直角方向Ｆへ等幅で伸びさせたのは、光透過性樹脂層１２０の背面からＬＥＤ等を用いて照光した場合、外部表示部分１１０を鮮明に表示させるためである。すなわち、本発明の樹脂成型物１００は、図６（ｂ）に示したキートップ６５０の外部表示部分に相当する部分がクサビ形状になっているために光漏れ等により起こる文字輪郭のぼやけの問題点を、光透過性樹脂層１２０の上面部１２２に対して直角方向Ｆへ等幅で凹部１２１ａ乃至凹部１２１ｃを伸びさせて外部表示部分の輪郭の外側からの光漏れ等を十分に低減させることにより解決している。   The reason why the concave portions 121a to 121c are extended with a uniform width in the direction F perpendicular to the upper surface portion 122 of the light transmissive resin layer 120 is that when illuminated from the back surface of the light transmissive resin layer 120 using an LED or the like, This is to display the external display portion 110 clearly. That is, the resin molded product 100 of the present invention has a problem of blurring of the character outline caused by light leakage because the portion corresponding to the external display portion of the key top 650 shown in FIG. By extending the recesses 121a to 121c with the same width in the direction F perpendicular to the upper surface portion 122 of the light-transmitting resin layer 120, the light leakage from the outside of the outline of the external display portion is sufficiently reduced. It is solved by.

なお、凹部１２１ａ乃至凹部１２１ｃは、上記説明したような光透過性樹脂層１２０の上面部１２２に対して直角方向へ等幅で伸びる構成が好適であるが、これに限るものではなく、それ以外の構成であってもよい。   The recesses 121a to 121c are preferably configured to extend at an equal width in the direction perpendicular to the upper surface portion 122 of the light-transmitting resin layer 120 as described above, but the present invention is not limited to this. It may be configured as follows.

一方、凹部１２１ｄおよび凹部１２１ｅは、それぞれ側面部１２３および側面部１２４の背面側に設けられた凹部である。図１（ｂ）に示した点線１２８より左側の部分のＬ型部分を側面部１２３と見て、図１（ｂ）に示した点線１２９より右側の部分のＬ型部分を側面部１２４と見れば、凹部１２１ｄおよび凹部１２１ｅを側面部１２３および側面部１２４の凹部と見ることができる。   On the other hand, the recessed portion 121d and the recessed portion 121e are recessed portions provided on the back side of the side surface portion 123 and the side surface portion 124, respectively. The L-shaped portion on the left side of the dotted line 128 shown in FIG. 1B can be seen as the side surface portion 123, and the L-shaped portion on the right side of the dotted line 129 shown in FIG. For example, the concave portion 121d and the concave portion 121e can be regarded as the concave portions of the side surface portion 123 and the side surface portion 124.

光遮蔽性樹脂部１３０は、凹部１２１を光遮蔽性樹脂で充填した部分である。図１（ｂ）において凹部１２１ａを光遮蔽性樹脂で充填した部分が光遮蔽性樹脂部１３０ａであり、凹部１２１ｂを光遮蔽性樹脂で充填した部分が光遮蔽性樹脂部１３０ｂであり、凹部１２１ｃを光遮蔽性樹脂で充填した部分が光遮蔽性樹脂部１３０ｃであり、凹部１２１ｄを光遮蔽性樹脂で充填した部分が光遮蔽性樹脂部１３０ｄであり、凹部１２１ｅを光遮蔽性樹脂で充填した部分が光遮蔽性樹脂部１３０ｅである。なお、凹部１２１をどの程度の深さ光遮蔽性樹脂で充填させるかは、任意である。すなわち、図１（ｂ）では隣接する凸部と同じ高さまで凹部１２１を光遮蔽性樹脂で充填しているが、これに限るものではない。また、光遮蔽性樹脂として、例えばＡＢＳ樹脂が想定されるが、これに限るものではない。   The light shielding resin portion 130 is a portion in which the concave portion 121 is filled with a light shielding resin. In FIG. 1B, the portion where the concave portion 121a is filled with the light shielding resin is the light shielding resin portion 130a, the portion where the concave portion 121b is filled with the light shielding resin is the light shielding resin portion 130b, and the concave portion 121c. The portion filled with the light shielding resin is the light shielding resin portion 130c, the portion filled with the recess 121d with the light shielding resin is the light shielding resin portion 130d, and the recess 121e is filled with the light shielding resin. The portion is the light shielding resin portion 130e. In addition, it is arbitrary how much the recessed part 121 is filled with light shielding resin. That is, in FIG. 1B, the concave portion 121 is filled with the light shielding resin to the same height as the adjacent convex portion, but is not limited thereto. Further, as the light shielding resin, for example, ABS resin is assumed, but it is not limited to this.

有色層１４０は、光透過性樹脂層１２０の背面側に設けられた色を有する層である。有色層１４０として、例えば有色の紙シートや樹脂フィルム等が想定されるが、これに限るものではない。また、図１（ｂ）において有色層は１つしか設けられていないが、後述の図２で説明するように複数あってもよい。   The colored layer 140 is a layer having a color provided on the back side of the light transmissive resin layer 120. As the colored layer 140, for example, a colored paper sheet or a resin film is assumed, but it is not limited thereto. In addition, although only one colored layer is provided in FIG. 1B, there may be a plurality as described in FIG.

有色層１４０を光透過性樹脂層１２０の背面側に設けると、有色層１４０の背面から照光して外部から樹脂成型物１００を見ると、図１においては、文字「Ｈ」の所定の部分に有色層１４０の色に対応する色が付いたように見える。   When the colored layer 140 is provided on the back side of the light-transmitting resin layer 120, when the resin molded product 100 is viewed from the outside by illuminating from the back side of the colored layer 140, a predetermined portion of the letter “H” is shown in FIG. It seems that the color corresponding to the color of the colored layer 140 is attached.

以上のように樹脂成型物１００を構成すれば、樹脂成型物１００の背面側から照光した際、外部表示部分を鮮明に表示させることができる。また、以上のように樹脂成型物１００を構成すれば、レーザー印字で外部表示部分を構成したキートップのように塗装面が剥がれて外部表示部分がなくなってしまうということが起こらない。   If the resin molded product 100 is configured as described above, the external display portion can be displayed clearly when illuminated from the back side of the resin molded product 100. Further, if the resin molded product 100 is configured as described above, it does not occur that the painted surface is peeled off and the external display portion is lost like a key top in which the external display portion is configured by laser printing.

図２は、本発明の実施の形態における樹脂成型物１００を用いた樹脂成型物ユニット２００の一構成例を示す図である。樹脂成型物ユニット２００は、樹脂成型物１００の背面側から照光する光源２１０を樹脂成型物１００の内部に設けたものである。光源２１０として、例えばＬＥＤが想定されるが、これに限るものではない。   FIG. 2 is a diagram showing a configuration example of a resin molded product unit 200 using the resin molded product 100 in the embodiment of the present invention. The resin molded product unit 200 is provided with a light source 210 that illuminates from the back side of the resin molded product 100 inside the resin molded product 100. For example, an LED is assumed as the light source 210, but the light source 210 is not limited thereto.

なお、樹脂成型物１００には、図１の場合と違って樹脂成型物１００に複数の有色層（例えば、有色層１４０ａおよび有色層１４０ｂ）を設けるようにしてもよい。すなわち、光透過性樹脂層１２０の背面の任意の位置に任意の色の有色層を複数設けるようにしてもよい。このように樹脂成型物１００を構成すれば、光源２１０により樹脂成型物１００を照光した場合、カラフルな表示を実現することができる。また、上記カラフルな複数色表示を１つの光源２１０で実現することができるメリットもある。   In addition, unlike the case of FIG. 1, the resin molding 100 may be provided with a plurality of colored layers (for example, the colored layer 140a and the colored layer 140b). That is, a plurality of colored layers of any color may be provided at any position on the back surface of the light transmissive resin layer 120. If the resin molded product 100 is configured in this way, a colorful display can be realized when the resin molded product 100 is illuminated by the light source 210. Further, there is an advantage that the above-described colorful multi-color display can be realized by one light source 210.

図３は、本発明の実施の形態における樹脂成型物１００の製造方法を示す図である。まず、所定の金型を用いて光透過性樹脂で射出成型して、図３（ａ）に示す光透過性樹脂層１２０を成型する（光透過性樹脂層成型工程）。この際、光透過性樹脂層１２０の背面側の凹部１２１の位置や大きさ、形状等は、外部表示部分１１０として、どのような表示をさせるかにより変わってくる。   FIG. 3 is a diagram showing a method for manufacturing the resin molded product 100 in the embodiment of the present invention. First, the light transmissive resin layer 120 shown in FIG. 3A is molded by injection molding with a light transmissive resin using a predetermined mold (light transmissive resin layer molding step). At this time, the position, size, shape, and the like of the concave portion 121 on the back side of the light transmissive resin layer 120 vary depending on what kind of display is performed as the external display portion 110.

次に、少なくとも凹部１２１内を光遮蔽性樹脂で充填させるよう光遮蔽性樹脂を所定の金型に流し込み、光透過性樹脂層１２０の背面に光遮蔽性樹脂の層である図３（ｂ）に示す光遮蔽性樹脂層１６０を射出成型する（光遮蔽性樹脂層成型工程）。   Next, the light shielding resin is poured into a predetermined mold so that at least the recess 121 is filled with the light shielding resin, and a light shielding resin layer is formed on the back surface of the light transmitting resin layer 120 (FIG. 3B). The light shielding resin layer 160 shown in FIG. 2 is injection molded (light shielding resin layer molding step).

光遮蔽性樹脂層１６０を射出成型した後に、例えば図３（ｂ）に示す切削ライン１７０に沿って光遮蔽性樹脂部１３０以外の光遮蔽性樹脂層１６０を切削する（切削工程）。これにより、図３（ｃ）に示すように樹脂成型物１００が出来上がる。さらに、必要に応じて、図３（ｄ）に示すように光透過性樹脂層１２０の背面側に有色の紙シートや樹脂フィルム等を貼ることにより有色層１４０を設けるようにしてもよい（有色層形成工程）。   After the light shielding resin layer 160 is injection molded, for example, the light shielding resin layer 160 other than the light shielding resin portion 130 is cut along a cutting line 170 shown in FIG. 3B (cutting process). Thereby, as shown in FIG.3 (c), the resin molding 100 is completed. Further, if necessary, a colored layer 140 may be provided by sticking a colored paper sheet or resin film on the back side of the light-transmitting resin layer 120 as shown in FIG. Layer forming step).

なお、切削工程において、切削ライン１７０に沿った切削のように光透過性樹脂層１２０を全く切削せずに、光遮蔽性樹脂層１６０のみを切削して樹脂成型物１００を作ることが困難な場合は、例えば図３（ｂ）に示す切削ライン１８０に沿って光遮蔽性樹脂層１６０および光透過性樹脂層１２０を切削してもよい。すなわち、切削工程には、「光遮蔽性樹脂部１３０以外の光遮蔽性樹脂層１６０を切削する」ことのみならず、「光遮蔽性樹脂部１３０以外の光遮蔽性樹脂層１６０および光透過性樹脂層１２０を切削する」ことも含まれる。さらに、切削ラインは、切削ライン１７０および１８０のような直線的なコの字型の切削ラインに限るものではなく、その他の形状の切削ラインであってもよい。   In the cutting process, it is difficult to make the resin molding 100 by cutting only the light-shielding resin layer 160 without cutting the light-transmitting resin layer 120 as in the case of cutting along the cutting line 170. In that case, for example, the light shielding resin layer 160 and the light transmissive resin layer 120 may be cut along the cutting line 180 shown in FIG. That is, in the cutting process, not only “cutting the light shielding resin layer 160 other than the light shielding resin portion 130” but also “light shielding resin layer 160 other than the light shielding resin portion 130 and the light transmitting property”. “Cutting the resin layer 120” is also included. Further, the cutting line is not limited to a straight U-shaped cutting line such as the cutting lines 170 and 180, and may be a cutting line having another shape.

なお、以上の樹脂成型物１００の製造方法は、樹脂成型物１００のように外部表示部分１１０を光透過性樹脂層１２０ａおよび１２０ｂによって表し、外部表示部分１１０以外を光遮蔽性樹脂部１３０で表した樹脂成型物のみならず、上記とは逆に外部表示部分１１０を、例えば図３（ｃ）に示した光遮蔽性樹脂部１３０ａ乃至１３０ｃで表し、外部表示部分１１０以外を、例えば図３（ｃ）に示した光透過性樹脂層１２０ａおよび１２０ｂによって表した樹脂成型物にも適用することができる。この樹脂成型物は、光透過性樹脂層１２０の背面側に形成された凹部が外部表示部分に対応しており、その外部表示部分に対応した凹部に光遮蔽性樹脂を充填させたものである。   In the method for manufacturing the resin molded product 100 described above, the external display portion 110 is represented by the light-transmitting resin layers 120a and 120b as in the resin molded product 100, and the portions other than the external display portion 110 are represented by the light shielding resin portion 130. Contrary to the above resin molded product, the external display portion 110 is represented by, for example, the light shielding resin portions 130a to 130c shown in FIG. 3C, and the portions other than the external display portion 110 are shown in FIG. The present invention can also be applied to resin molded products represented by the light transmissive resin layers 120a and 120b shown in c). In this resin molded product, the concave portion formed on the back side of the light transmissive resin layer 120 corresponds to the external display portion, and the concave portion corresponding to the external display portion is filled with a light shielding resin. .

以上のような樹脂成型物１００の製造方法によれば、隣り合う外部表示部分の間隔や外部表示部分の大きさに関係なく外部表示部分を有する樹脂成型物を製造することができる。また、以上のような樹脂成型物１００の製造方法によれば、塗料を用いずとも様々な表示（例えば、隣り合う外部表示部分の間隔が小さい表示、小さい文字等）を樹脂成型物に形成させることができるため、環境にもよい。   According to the manufacturing method of the resin molding 100 as described above, a resin molding having an external display portion can be manufactured regardless of the interval between adjacent external display portions and the size of the external display portion. Further, according to the method of manufacturing the resin molded product 100 as described above, various displays (for example, a display with a small interval between adjacent external display parts, small characters, etc.) are formed on the resin molded product without using paint. It is good for the environment.

図４は、本発明の別の実施の形態における樹脂成型物１００の製造方法を示す図である。図４における樹脂成型物１００の製造方法は、図３における樹脂成型物１００の製造方法の光透過性樹脂層成型工程と光遮蔽性樹脂層成型工程との順番を逆にしたものであり、以下説明する。   FIG. 4 is a diagram showing a method for manufacturing a resin molded product 100 according to another embodiment of the present invention. The manufacturing method of the resin molded product 100 in FIG. 4 is obtained by reversing the order of the light-transmitting resin layer molding step and the light shielding resin layer molding step in the manufacturing method of the resin molded product 100 in FIG. explain.

まず、所定の金型を用いて光遮蔽性樹脂で射出成型して、図４（ａ）に示す光遮蔽性樹脂層１６０を成型する（光遮蔽性樹脂層成型工程）。この際、光遮蔽性樹脂層１６０の表面側の凹部１６１の位置や大きさ、形状等は、外部表示部分１１０として、どのような表示をさせるかにより変わってくる。   First, the light shielding resin layer 160 shown in FIG. 4A is molded by injection molding with a light shielding resin using a predetermined mold (light shielding resin layer molding step). At this time, the position, size, shape, and the like of the concave portion 161 on the surface side of the light shielding resin layer 160 vary depending on what kind of display is performed as the external display portion 110.

次に、光透過性樹脂を所定の金型に流し込み、光遮蔽性樹脂層１６０の上側に光透過性樹脂の層である図４（ｂ）に示す光透過性樹脂層１２０を射出成型する（光透過性樹脂層成型工程）。光透過性樹脂層１２０を射出成型した後に、例えば図４（ｂ）に示す切削ライン１７０に沿って光遮蔽性樹脂部１３０以外の光遮蔽性樹脂層１６０を切削する（切削工程）。これにより、図４（ｃ）に示すように樹脂成型物１００が出来上がる。さらに、必要に応じて、図４（ｄ）に示すように光透過性樹脂層１２０の背面側に有色の紙シートや樹脂フィルム等を貼ることにより有色層１４０を設けるようにしてもよい（有色層形成工程）。   Next, the light-transmitting resin is poured into a predetermined mold, and the light-transmitting resin layer 120 shown in FIG. 4B, which is a layer of the light-transmitting resin, is injection-molded above the light-blocking resin layer 160 ( Light transmissive resin layer molding process). After the light transmissive resin layer 120 is injection molded, for example, the light shielding resin layer 160 other than the light shielding resin portion 130 is cut along a cutting line 170 shown in FIG. 4B (cutting process). Thereby, as shown in FIG.4 (c), the resin molding 100 is completed. Further, if necessary, a colored layer 140 may be provided by sticking a colored paper sheet or resin film on the back side of the light-transmitting resin layer 120 as shown in FIG. Layer forming step).

なお、切削工程において、切削ライン１７０に沿った切削のように光透過性樹脂層１２０を全く切削せずに、光遮蔽性樹脂層１６０のみを切削して樹脂成型物１００を作ることが困難な場合は、例えば図４（ｂ）に示す切削ライン１８０に沿って光遮蔽性樹脂層１６０および光透過性樹脂層１２０を切削してもよい。すなわち、切削工程には、「光遮蔽性樹脂部１３０以外の光遮蔽性樹脂層１６０を切削する」ことのみならず、「光遮蔽性樹脂部１３０以外の光遮蔽性樹脂層１６０および光透過性樹脂層１２０を切削する」ことも含まれる。さらに、切削ラインは、切削ライン１７０および１８０のような直線的なコの字型の切削ラインに限るものではなく、その他の形状の切削ラインであってもよい。   In the cutting process, it is difficult to make the resin molding 100 by cutting only the light-shielding resin layer 160 without cutting the light-transmitting resin layer 120 as in the case of cutting along the cutting line 170. In this case, for example, the light shielding resin layer 160 and the light transmissive resin layer 120 may be cut along the cutting line 180 shown in FIG. That is, in the cutting process, not only “cutting the light shielding resin layer 160 other than the light shielding resin portion 130” but also “light shielding resin layer 160 other than the light shielding resin portion 130 and the light transmitting property”. “Cutting the resin layer 120” is also included. Further, the cutting line is not limited to a straight U-shaped cutting line such as the cutting lines 170 and 180, and may be a cutting line having another shape.

なお、以上の樹脂成型物１００の製造方法は、樹脂成型物１００のように外部表示部分１１０を光透過性樹脂層１２０ａおよび１２０ｂによって表し、外部表示部分１１０以外を光遮蔽性樹脂部１３０で表した樹脂成型物のみならず、上記とは逆に外部表示部分１１０を、例えば図４（ｃ）に示した光遮蔽性樹脂部１３０ａ乃至１３０ｃで表し、外部表示部分１１０以外を、例えば図４（ｃ）に示した光透過性樹脂層１２０ａおよび１２０ｂによって表した樹脂成型物にも適用することができる。この樹脂成型物は、光透過性樹脂層１２０の背面側に形成された凹部が外部表示部分に対応しており、その外部表示部分に対応した凹部に光遮蔽性樹脂を充填させたものである。   In the method for manufacturing the resin molded product 100 described above, the external display portion 110 is represented by the light-transmitting resin layers 120a and 120b as in the resin molded product 100, and the portions other than the external display portion 110 are represented by the light shielding resin portion 130. In addition to the resin molded product, the external display portion 110 is represented by, for example, the light shielding resin portions 130a to 130c shown in FIG. 4C, and the portions other than the external display portion 110 are shown in FIG. The present invention can also be applied to resin molded products represented by the light transmissive resin layers 120a and 120b shown in c). In this resin molded product, the concave portion formed on the back side of the light transmissive resin layer 120 corresponds to the external display portion, and the concave portion corresponding to the external display portion is filled with a light shielding resin. .

以上のような樹脂成型物１００の製造方法によれば、隣り合う外部表示部分の間隔や外部表示部分の大きさに関係なく外部表示部分を有する樹脂成型物を製造することができる。また、以上のような樹脂成型物１００の製造方法によれば、塗料を用いずとも様々な表示（例えば、隣り合う外部表示部分の間隔が小さい表示、小さい文字等）を樹脂成型物に形成させることができるため、環境にもよい。   According to the manufacturing method of the resin molding 100 as described above, a resin molding having an external display portion can be manufactured regardless of the interval between adjacent external display portions and the size of the external display portion. Further, according to the method of manufacturing the resin molded product 100 as described above, various displays (for example, a display with a small interval between adjacent external display parts, small characters, etc.) are formed on the resin molded product without using paint. It is good for the environment.

図５は、外部表示部分が光透過性樹脂層で表された部分（樹脂成型物１００に相当するもの）、および外部表示部分が光遮蔽性樹脂部で表された部分の両方が含まれた樹脂成型物５００の製造方法を示す図である。   FIG. 5 includes both a part where the external display part is represented by a light-transmitting resin layer (corresponding to the resin molding 100) and a part where the external display part is represented by a light-shielding resin part. It is a figure which shows the manufacturing method of the resin molding 500.

図５（ａ）は、樹脂成型物５００の平面図である。樹脂成型物５００の右側は、外部表示部分５１１が「Ｈ」で、その「Ｈ」が光透過性樹脂層（透明部分）で表され、その「Ｈ」の周囲が光遮蔽性樹脂部（色付き部分）で表されたものであり、樹脂成型物１００に相当する部分である。一方、樹脂成型物５００の左側は、外部表示部分５１２が「Ｈ」で、その「Ｈ」が光遮蔽性樹脂部（色付き部分）で表され、その「Ｈ」の周囲が光透過性樹脂層（透明部分）で表されたものである。   FIG. 5A is a plan view of the resin molded product 500. On the right side of the resin molded product 500, the external display portion 511 is “H”, the “H” is represented by a light transmissive resin layer (transparent portion), and the periphery of the “H” is a light shielding resin portion (colored) Part), which corresponds to the resin molded product 100. On the other hand, on the left side of the resin molding 500, the external display portion 512 is “H”, the “H” is represented by a light shielding resin portion (colored portion), and the periphery of the “H” is a light-transmitting resin layer. (Transparent part).

次に、樹脂成型物５００の製造方法を図５（ｂ）乃至図５（ｄ）を用いて説明する。なお、樹脂成型物５００のＢ−Ｂ断面から見た樹脂成型物５００の製造過程が図５（ｂ）乃至図５（ｄ）において示されている。   Next, a method for manufacturing the resin molded product 500 will be described with reference to FIGS. 5 (b) to 5 (d). In addition, the manufacturing process of the resin molding 500 seen from the BB cross section of the resin molding 500 is shown in FIG. 5B to FIG.

樹脂成型物５００における製造方法も図３および図４で説明した製造方法と同様の製造方法で製造することができる。なお、以下においては、図３における製造方法に習って樹脂成型物５００を製造する方法について説明することとする。まず、所定の金型を用いて光透過性樹脂で射出成型して、図５（ｂ）に示す光透過性樹脂層５２０を成型する（光透過性樹脂層成型工程）。光透過性樹脂層５２０の背面側の凹部５２１ａおよび５２１ｂは、それぞれ図５（ａ）における左側の外部表示部分５１１の「Ｈ」における表示５１１ａおよび５１１ｂに相当する部分である。また、光透過性樹脂層５２０の背面側の凸部５２２ａおよび５２２ｂは、それぞれ図５（ａ）における右側の外部表示部分５１２の「Ｈ」における表示５１２ａおよび５１２ｂに相当する部分である。   The manufacturing method in the resin molded product 500 can also be manufactured by the same manufacturing method as the manufacturing method demonstrated in FIG. 3 and FIG. In the following, a method for manufacturing the resin molded product 500 according to the manufacturing method in FIG. 3 will be described. First, the light transmissive resin layer 520 shown in FIG. 5B is molded by injection molding with a light transmissive resin using a predetermined mold (light transmissive resin layer molding step). The concave portions 521a and 521b on the back side of the light transmissive resin layer 520 are portions corresponding to the displays 511a and 511b in “H” of the left external display portion 511 in FIG. Further, the convex portions 522a and 522b on the back side of the light transmissive resin layer 520 are portions corresponding to the displays 512a and 512b in “H” of the right external display portion 512 in FIG. 5A, respectively.

次に、少なくとも凹部５２１ａ乃至５２１ｅ内を光遮蔽性樹脂で充填させるよう光遮蔽性樹脂を所定の金型に流し込み、光透過性樹脂層５２０の背面側に光遮蔽性樹脂の層である図５（ｃ）に示す光遮蔽性樹脂層５６０を射出成型する（光遮蔽性樹脂層成型工程）。なお、上記光透過性樹脂層成型工程と光遮蔽性樹脂層成型工程との順番を逆にすれば、図４における製造方法と同様になる。   Next, a light shielding resin is poured into a predetermined mold so that at least the recesses 521a to 521e are filled with the light shielding resin, and a light shielding resin layer is formed on the back side of the light transmitting resin layer 520. FIG. The light shielding resin layer 560 shown in (c) is injection molded (light shielding resin layer molding step). If the order of the light transmissive resin layer molding step and the light shielding resin layer molding step is reversed, the manufacturing method in FIG. 4 is the same.

光遮蔽性樹脂層５６０を射出成型した後に、図５（ｃ）の切削ライン５７０に沿って光遮蔽性樹脂部５３０以外の光透過性樹脂層５２０および光遮蔽性樹脂層５６０を切削する（切削工程）。なお、切削工程において光透過性樹脂層５２０を切削しない切削ライン５８０に沿って光遮蔽性樹脂層５６０のみを切削してもよい。これにより、図５（ｄ）に示すように樹脂成型物５００が出来上がる。なお、光遮蔽性樹脂部５３０ａおよび５３０ｂは、外部表示部分５１１の「Ｈ」における表示５１１ａおよび５１１ｂに相当する部分であり、光遮蔽性樹脂部５３０ｃ乃至５３０ｅは、外部表示部分５１２の「Ｈ」における表示５１２ａおよび５１２ｂの周囲に相当する部分である。さらに、図示していないが、必要に応じて図３および図４で説明した場合と同様に有色層を設けるようにしてもよい（有色層形成工程）。   After the light shielding resin layer 560 is injection molded, the light transmitting resin layer 520 and the light shielding resin layer 560 other than the light shielding resin portion 530 are cut along the cutting line 570 in FIG. Process). Note that only the light shielding resin layer 560 may be cut along a cutting line 580 that does not cut the light transmissive resin layer 520 in the cutting step. Thereby, as shown in FIG.5 (d), the resin molding 500 is completed. The light shielding resin portions 530 a and 530 b are portions corresponding to the displays 511 a and 511 b in “H” of the external display portion 511, and the light shielding resin portions 530 c to 530 e are “H” of the external display portion 512. This is a portion corresponding to the periphery of the displays 512a and 512b. Further, although not shown, a colored layer may be provided if necessary as in the case described with reference to FIGS. 3 and 4 (colored layer forming step).

以上のような樹脂成型物５００の製造方法によれば、隣り合う外部表示部分の間隔や外部表示部分の大きさに関係なく様々な態様の外部表示部分を有する樹脂成型物を製造することができる。また、以上のような樹脂成型物５００の製造方法によれば、塗料を用いずとも様々な表示（例えば、隣り合う外部表示部分の間隔が小さい表示、小さい文字等）を樹脂成型物に形成させることができるため、環境にもよい。   According to the method of manufacturing the resin molded product 500 as described above, it is possible to manufacture a resin molded product having external display portions of various modes regardless of the interval between adjacent external display portions and the size of the external display portions. . Further, according to the method of manufacturing the resin molded product 500 as described above, various displays (for example, a display with a small interval between adjacent external display portions, small characters, etc.) are formed on the resin molded product without using paint. It is good for the environment.

なお、以上説明した本発明の実施の形態は本発明を具現化するための一例を示したものであり、これに限定されるものではなく本発明の要旨を逸脱しない範囲において種々の変形を施すことができる。   The embodiment of the present invention described above is an example for embodying the present invention, and the present invention is not limited to this, and various modifications are made without departing from the gist of the present invention. be able to.

本発明は、例えばキーボードのキートップや自動車のエアコンのボタン等の外部表示部分を有する樹脂成型物を製造する際に活用することができる。   The present invention can be utilized when manufacturing a resin molding having an external display portion such as a key top of a keyboard or a button of an air conditioner of an automobile.

１００、５００ 樹脂成型物
１１０ 外部表示部分
１２０、５２０ 光透過性樹脂層
１２１、１２１ａ、１２１ｂ、１２１ｃ、１２１ｄ、１２１ｅ、１６１、５２１ａ、５２１ｂ、５２１ｃ、５２１ｄ、５２１ｅ 凹部
１２２ 上面部
１２３、１２４、１２５、１２６ 側面部
１３０、１３０ａ、１３０ｂ、１３０ｃ、１３０ｄ、１３０ｅ 光遮蔽性樹脂部
１４０、１４０ａ、１４０ｂ 有色層
１６０、５６０ 光遮蔽性樹脂層
２００ 樹脂成型物ユニット
２１０ 光源
５２２ａ、５２２ｂ 凸部 100, 500 Resin molding 110 External display portion 120, 520 Light transmissive resin layer 121, 121a, 121b, 121c, 121d, 121e, 161, 521a, 521b, 521c, 521d, 521e Recessed portion 122 Upper surface portion 123, 124, 125 , 126 Side surface portion 130, 130a, 130b, 130c, 130d, 130e Light shielding resin portion 140, 140a, 140b Colored layer 160, 560 Light shielding resin layer 200 Resin molded product unit 210 Light source 522a, 522b Convex portion

Claims (6)

背面側に外部に表示させるべき外部表示部分に対応する凹部、および前記外部表示部分以外の部分に対応する凹部の両方、またはいずれか一方を有するよう光透過性樹脂により成型された層である光透過性樹脂層と、それぞれの前記凹部内を光遮蔽性樹脂により充填した光遮蔽性樹脂部とを備えた樹脂成型物を製造する樹脂成型物製造方法であって、
前記光透過性樹脂層を成型する光透過性樹脂層成型工程と、
少なくとも前記それぞれの凹部内を前記光遮蔽性樹脂で充填させるよう前記光遮蔽性樹脂を流し込んで前記光透過性樹脂層の背面に光遮蔽性樹脂の層である光遮蔽性樹脂層を成型する光遮蔽性樹脂層成型工程と、
前記光遮蔽性樹脂部以外の前記光遮蔽性樹脂層、または前記光遮蔽性樹脂部以外の前記光遮蔽性樹脂層および前記光透過性樹脂層を切削する切削工程と
を具備することを特徴とする樹脂成型物製造方法。 Light that is a layer molded from a light-transmitting resin so as to have either or both of a recess corresponding to an external display portion to be displayed on the back side and a recess corresponding to a portion other than the external display portion A resin molded product production method for producing a resin molded product comprising a transparent resin layer and a light shielding resin portion filled with a light shielding resin in each of the recesses,
A light transmissive resin layer molding step for molding the light transmissive resin layer;
Light for casting a light shielding resin layer, which is a layer of a light shielding resin, on the back surface of the light transmissive resin layer by pouring the light shielding resin so that at least the respective recesses are filled with the light shielding resin. A shielding resin layer molding step;
A cutting step of cutting the light shielding resin layer other than the light shielding resin portion, or the light shielding resin layer other than the light shielding resin portion and the light transmissive resin layer. Resin molded product manufacturing method. 前記光透過性樹脂層成型工程において前記光透過性樹脂層を透明樹脂により成型し、
前記切削工程後に、前記光透過性樹脂層の背面側に色を有する層である有色層を少なくとも１つ形成する有色層形成工程をさらに具備することを特徴とする請求項１記載の樹脂成型物製造方法。 In the light transmissive resin layer molding step, the light transmissive resin layer is molded with a transparent resin,
2. The molded resin product according to claim 1, further comprising a colored layer forming step of forming at least one colored layer, which is a layer having a color, on the back side of the light transmissive resin layer after the cutting step. Production method. 背面側に外部に表示させるべき外部表示部分に対応する凹部、および前記外部表示部分以外の部分に対応する凹部の両方、またはいずれか一方を有するよう光透過性樹脂により成型された層である光透過性樹脂層と、それぞれの前記凹部内を光遮蔽性樹脂により充填した光遮蔽性樹脂部とを備えた樹脂成型物を製造する樹脂成型物製造方法であって、
それぞれの前記凹部に対応する凸部を表面に有するように光遮蔽性樹脂により成型された層である光遮蔽性樹脂層を成型する光遮蔽性樹脂層成型工程と、
前記光透過性樹脂を流し込んで前記光遮蔽性樹脂層の表面に光透過性樹脂の層である光透過性樹脂層を成型する光透過性樹脂層成型工程と、
前記光遮蔽性樹脂部以外の前記光遮蔽性樹脂層、または前記光遮蔽性樹脂部以外の前記光遮蔽性樹脂層および前記光透過性樹脂層を切削する切削工程と
を具備することを特徴とする樹脂成型物製造方法。 Light that is a layer molded from a light-transmitting resin so as to have either or both of a recess corresponding to an external display portion to be displayed on the back side and a recess corresponding to a portion other than the external display portion A resin molded product production method for producing a resin molded product comprising a transparent resin layer and a light shielding resin portion filled with a light shielding resin in each of the recesses,
A light shielding resin layer molding step of molding a light shielding resin layer, which is a layer molded with a light shielding resin so as to have a convex portion corresponding to each of the concave portions on the surface;
A light-transmitting resin layer molding step of casting the light-transmitting resin and molding a light-transmitting resin layer that is a light-transmitting resin layer on the surface of the light-shielding resin layer;
A cutting step of cutting the light shielding resin layer other than the light shielding resin portion, or the light shielding resin layer other than the light shielding resin portion and the light transmissive resin layer. Resin molded product manufacturing method. 背面側に外部に表示させるべき外部表示部分以外の部分に対応する凹部を有するよう光透過性樹脂により成型された層である光透過性樹脂層と、
前記凹部内を光遮蔽性樹脂により充填した光遮蔽性樹脂部と
を備え、
前記凹部は、前記光透過性樹脂層に対して略直角方向に等幅で設けられたことを特徴とする樹脂成型物。 A light-transmitting resin layer, which is a layer formed of a light-transmitting resin so as to have a recess corresponding to a portion other than an external display portion to be externally displayed on the back side;
A light shielding resin portion filled with a light shielding resin in the recess,
The resin molding is characterized in that the recess is provided with a uniform width in a direction substantially perpendicular to the light transmissive resin layer. 前記光透過性樹脂層の背面側に色を有する層である有色層を少なくとも１つさらに備えたことを特徴とする請求項４記載の樹脂成型物。   The resin molded product according to claim 4, further comprising at least one colored layer which is a layer having a color on the back side of the light transmissive resin layer. 背面側に外部に表示させるべき外部表示部分以外の部分に対応する凹部を有するよう光透過性樹脂により成型された層である光透過性樹脂層と、
前記凹部内を光遮蔽性樹脂により充填した光遮蔽性樹脂部と、
前記光透過性樹脂層の背面側に位置し、前記外部表示部分を背面側から照光する光源と
を備え、
前記凹部は、前記光透過性樹脂層に対して略直角方向に等幅で設けられたことを特徴とする樹脂成型物ユニット。 A light-transmitting resin layer, which is a layer formed of a light-transmitting resin so as to have a recess corresponding to a portion other than an external display portion to be externally displayed on the back side;
A light shielding resin portion filled with a light shielding resin in the recess;
A light source located on the back side of the light-transmitting resin layer and illuminating the external display portion from the back side;
The resin molding unit, wherein the recess is provided with a uniform width in a direction substantially perpendicular to the light transmissive resin layer.
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