JP7105124B2 - Method for producing two-color molding and two-color molding - Google Patents

Method for producing two-color molding and two-color molding Download PDF

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JP7105124B2
JP7105124B2 JP2018136458A JP2018136458A JP7105124B2 JP 7105124 B2 JP7105124 B2 JP 7105124B2 JP 2018136458 A JP2018136458 A JP 2018136458A JP 2018136458 A JP2018136458 A JP 2018136458A JP 7105124 B2 JP7105124 B2 JP 7105124B2
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充 田村
正輝 大塚
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Olympus Corp
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Description

本発明は、二色成形物の製造方法および二色成形物に関する。 The present invention relates to a method for producing a two-color molding and a two-color molding.

内視鏡等の光学デバイスにおいて、生産性向上を図るために、一次成形物である光学素子とそれを支える二次成形物であるワク構造を二色射出成形(二色成形)によって製造する技術が知られている。このような二色成形によって製造された光学デバイスは、例えば特許文献1に示すように、光学素子の側方に突出部(タブ)が設けられており、この突出部と、光学デバイスの外観を構成する二次成形物の表面との間に薄肉部が形成されている。 A technology for manufacturing optical elements, which are primary moldings, and a frame structure, which is a secondary molding that supports them, by two-color injection molding (two-color molding) in order to improve productivity in optical devices such as endoscopes. It has been known. An optical device manufactured by such two-color molding is provided with a protrusion (tab) on the side of an optical element, as shown in Patent Document 1, for example. A thin portion is formed between the surface of the forming secondary molding.

国際公開第2011/111242号WO2011/111242

前記した薄肉部では、二色成形工程において二次成形樹脂を充填した際の流動抵抗の増加や、樹脂温度の低下が発生しやすい。また最近では、機能性向上のために、光学デバイスが細径化しており、それに伴い、光学デバイスに形成される孔(他の光学部品を挿入するための孔)の内径が相対的に大きくなっている。そのため、光学デバイスの体積が相対的に小さくなり、樹脂を充填しにくくなっている。 In the thin portion described above, when the secondary molding resin is filled in the two-color molding process, an increase in flow resistance and a decrease in resin temperature are likely to occur. In recent years, optical devices have become thinner in order to improve their functionality, and along with this, the inner diameter of holes formed in the optical devices (holes for inserting other optical components) has become relatively large. ing. Therefore, the volume of the optical device is relatively small, making it difficult to fill the resin.

このような理由から、従来の二色成形物の製造方法では、二次成形工程において、一次成形物で分流した二次成形樹脂の流れが前記した薄肉部の位置で合流し、薄肉部に深いウェルドラインが形成されることにより、二色成形物の外観品質、強度および耐薬品性が低下するという問題があった。 For this reason, in the conventional method for manufacturing two-color molded products, in the secondary molding process, the flows of the secondary molded resins diverted in the primary molded product join at the positions of the thin-walled parts, and the thin-walled parts are deep. There is a problem that the appearance quality, strength and chemical resistance of the two-color molding deteriorate due to the formation of the weld line.

本発明は、上記に鑑みてなされたものであって、外観品質、強度および耐薬品性の低下を抑制することができる二色成形物の製造方法および二色成形物を提供することを目的とする。 The present invention has been made in view of the above, and an object of the present invention is to provide a method for producing a two-color molded product and a two-color molded product that can suppress deterioration in appearance quality, strength and chemical resistance. do.

上述した課題を解決し、目的を達成するために、本発明に係る二色成形物の製造方法は、ゲートから二次成形樹脂を充填することにより、一次成形物を構成する光学素子の側面と、前記光学素子の側方から突出する突出部とを前記二次成形樹脂によって埋め込み、二次成形物を成形し、前記二次成形物の成形は、平面視において、前記突出部の突出方向を前記ゲートに向けて行い、前記一次成形物および前記二次成形物からなる二色成形物は、光学デバイスの一部品を構成し、前記二次成形物は、前記一次成形物が埋め込まれ、前記光学素子とともに前記光学デバイスの外観を構成する外観部と、前記ゲートが設けられ、前記光学デバイスの他部品が接続される接続部と、前記一次成形物と重ならない位置において、前記外観部および前記接続部を貫通して形成される貫通孔と、を有する。 In order to solve the above-described problems and achieve the object, a method for manufacturing a two-color molded product according to the present invention is provided by filling a secondary molding resin from a gate to form a side surface of an optical element that constitutes a primary molded product. , the projecting portion projecting from the side of the optical element is embedded in the secondary molding resin to mold a secondary molded product, and the molding of the secondary molded product is performed so that the projecting direction of the projecting portion is in a plan view. A two-color molded product made of the primary molded product and the secondary molded product facing the gate constitutes one part of an optical device, and the secondary molded product is embedded with the primary molded product, and an exterior portion that forms the exterior of the optical device together with the optical element; a connection portion that is provided with the gate and to which other parts of the optical device are connected; and a through hole formed through the connecting portion.

また、本発明に係る二色成形物の製造方法は、上記発明において、前記二次成形物の成形は、平面視において、前記接続部の外周面と前記貫通孔の内周面とが接近した薄肉部を避けた位置に設けられたゲートから、前記二次成形樹脂を注入してもよい。 Further, in the method for producing a two-color molded product according to the present invention, in the above invention, the secondary molded product is formed such that the outer peripheral surface of the connecting portion and the inner peripheral surface of the through hole are close to each other in plan view. The secondary molding resin may be injected from a gate provided at a position avoiding the thin portion.

また、本発明に係る二色成形物の製造方法は、上記発明において、前記二次成形物の成形の前に、前記突出部に設けられた一次成形用のゲートから一次成形樹脂を充填することにより、前記一次成形物を成形してもよい。 Further, the method for manufacturing a two-color molded product according to the present invention is the above invention, wherein the primary molding resin is filled from a gate for primary molding provided in the projecting portion before molding the secondary molded product. The primary molded product may be molded by

また、本発明に係る二色成形物の製造方法は、上記発明において、前記外観部の直径に対する前記貫通孔の直径の比は、0.3~0.5であってもよい。 Further, in the method for producing a two-color molded product according to the present invention, in the above invention, the ratio of the diameter of the through-hole to the diameter of the outer appearance portion may be 0.3 to 0.5.

上述した課題を解決し、目的を達成するために、本発明に係る二色成形物は、光学デバイスの一部品を構成し、光学素子、および、前記光学素子の光学素子の側方から突出する突出部を有する一次成形物と、前記一次成形物が埋め込まれ、前記光学素子とともに前記光学デバイスの外観を構成する外観部と、二次成形樹脂を充填するゲートが設けられ、前記光学デバイスの他部品が接続される接続部と、前記一次成形物と重ならない位置において、前記外観部および前記接続部を貫通して形成される貫通孔と、を有する二次成形物と、を備え、前記突出部は、突出方向が前記ゲートに向いている。 In order to solve the above-described problems and achieve the object, the two-color molding according to the present invention constitutes one part of an optical device, and projects from an optical element and the side of the optical element of the optical element. A primary molding having a protruding portion, an exterior portion in which the primary molding is embedded and which constitutes the exterior of the optical device together with the optical element, and a gate filled with a secondary molding resin are provided, and the optical device is provided with a gate. a secondary molded product having a connecting portion to which a component is connected, and a through hole formed through the outer appearance portion and the connecting portion at a position not overlapping the primary molded product, the projecting The projecting direction of the portion faces the gate.

本発明によれば、突出部の突出方向をゲートに向けて二次成形を行うことにより、他の部分よりも先に、突出部と二次成形物の表面との間の薄肉部に二次成形樹脂が充填される。これにより、一次成形物で分流した二次成形樹脂の流れが、薄肉部以外の領域で合流し、当該薄肉部を避けてウェルドラインが形成される。従って、外観品質、強度および耐薬品性の低下を抑制することができる。 According to the present invention, secondary molding is performed with the projecting direction of the projecting portion directed toward the gate, so that the thin portion between the projecting portion and the surface of the secondary molding is subjected to secondary molding before other portions. It is filled with molding resin. As a result, the flow of the secondary molding resin split in the primary molding merges in a region other than the thin-walled portion, and a weld line is formed avoiding the thin-walled portion. Therefore, deterioration in appearance quality, strength and chemical resistance can be suppressed.

図1は、本発明の実施の形態1に係る二色成形物の製造方法で製造した一次成形物の一例を示す斜視図である。FIG. 1 is a perspective view showing an example of a primary molded product manufactured by a method for manufacturing a two-color molded product according to Embodiment 1 of the present invention. 図2は、本発明の実施の形態1に係る二色成形物の製造方法で製造した二色成形物の一例を示す斜視図である。FIG. 2 is a perspective view showing an example of a two-color molded product manufactured by the method for manufacturing a two-color molded product according to Embodiment 1 of the present invention. 図3は、本発明の実施の形態1に係る二色成形物の製造方法で製造した二色成形物の一例を示す平面図である。FIG. 3 is a plan view showing an example of a two-color molded product manufactured by the method for manufacturing a two-color molded product according to Embodiment 1 of the present invention. 図4は、本発明の実施の形態1に係る二色成形物の製造方法で製造した二色成形物の一例を示す図であり、図3のA-A線断面図である。FIG. 4 is a diagram showing an example of a two-color molded product manufactured by the method for manufacturing a two-color molded product according to Embodiment 1 of the present invention, and is a cross-sectional view taken along the line AA of FIG. 図5は、本発明の実施の形態2に係る二色成形物の製造方法で製造した二色成形物の一例を示す斜視図である。FIG. 5 is a perspective view showing an example of a two-color molded product manufactured by the method for manufacturing a two-color molded product according to Embodiment 2 of the present invention. 図6は、本発明の実施の形態2に係る二色成形物の製造方法で製造した二色成形物の一例を示す平面図である。FIG. 6 is a plan view showing an example of a two-color molded product manufactured by the method for manufacturing a two-color molded product according to Embodiment 2 of the present invention. 図7は、本発明の実施の形態3に係る二色成形物の製造方法で製造した二色成形物の一例を示す斜視図である。FIG. 7 is a perspective view showing an example of a two-color molded product manufactured by the method for manufacturing a two-color molded product according to Embodiment 3 of the present invention. 図8は、本発明の実施の形態3に係る二色成形物の製造方法で製造した二色成形物の一例を示す平面図である。FIG. 8 is a plan view showing an example of a two-color molded product manufactured by the method for manufacturing a two-color molded product according to Embodiment 3 of the present invention. 図9は、本発明の実施の形態4に係る二色成形物の製造方法で製造した二色成形物の一例を示す斜視図である。FIG. 9 is a perspective view showing an example of a two-color molded product manufactured by the method for manufacturing a two-color molded product according to Embodiment 4 of the present invention. 図10は、本発明の実施の形態4に係る二色成形物の製造方法で製造した二色成形物の一例を示す平面図である。FIG. 10 is a plan view showing an example of a two-color molded product manufactured by the method for manufacturing a two-color molded product according to Embodiment 4 of the present invention.

以下、本発明に係る二色成形物の製造方法および二色成形物の実施の形態について、図面を参照しながら説明する。なお、本発明は以下の実施の形態に限定されるものではなく、以下の実施の形態における構成要素には、当業者が置換可能かつ容易なもの、あるいは実質的に同一のものも含まれる。 Hereinafter, embodiments of the method for producing a two-color molded product and the two-color molded product according to the present invention will be described with reference to the drawings. In addition, the present invention is not limited to the following embodiments, and the constituent elements in the following embodiments include those that can be easily replaced by those skilled in the art, or those that are substantially the same.

[二色成形物の製造方法]
まず、本発明の実施形態に係る二色成形物の製造方法の概要について説明する。二色成形物の製造方法では、例えば内視鏡等の光学デバイスの一部品を構成する二色成形物を製造する。二色成形物の製造方法では、一次成形物を成形する一次成形工程と、一次成形物を埋め込みつつ二次成形物を成形する二次成形工程と、を順に行うことにより、一次成形物および二次成形部とからなる二色成形物を製造する。なお、例えば一次成形物を別途調達して用いる場合は、一次成形工程は不要であり、二次成形工程のみを行って二色成形物を製造することもできる。
[Manufacturing method of two-color molding]
First, an outline of a method for manufacturing a two-color molding according to an embodiment of the present invention will be described. In the method for producing a two-color molded product, a two-color molded product that constitutes one part of an optical device such as an endoscope is manufactured. In the method for producing a two-color molded product, the primary molded product and the secondary molded product are produced by sequentially performing a primary molding step of molding the primary molded product and a secondary molding step of molding the secondary molded product while embedding the primary molded product. Next, a two-color molded product is manufactured. For example, when a primary molding is separately procured and used, the primary molding process is unnecessary, and the two-color molding can be manufactured by performing only the secondary molding process.

一次成形工程では、例えばPC(ポリカーボネート)等の透明樹脂からなる一次成形樹脂を、二色成形金型における一次成形物用のキャビティに充填することにより一次成形物を成形する。また、一次成形工程では、例えばPC(ポリカーボネート)等に不透明な着色をした着色樹脂からなる二次成形樹脂を、二色成形金型における二次成形物用のキャビティに充填することにより二次成形物を成形する。なお、以下の説明では、一次成形工程および二次成形工程で用いる二色成形金型の構成についての説明は省略し、成形の結果物である一次成形物、二次成形物および二色成形物の構成に基づいて、各工程の説明を行う。二色成形金型については、後記する一次成形物および二次成形物を成形可能なものを適宜選択して用いればよい。 In the primary molding step, a primary molded article is molded by filling a primary molding resin made of a transparent resin such as PC (polycarbonate) into a primary molded article cavity in a two-color molding die. In the primary molding process, for example, a secondary molded resin made of opaque colored resin such as PC (polycarbonate) is filled into the cavity for the secondary molded product in the two-color molding die, thereby forming the secondary molded product. shape things. In the following description, the description of the configuration of the two-color molding mold used in the primary molding process and the secondary molding process is omitted, and the primary molded product, secondary molded product, and two-color molded product that are the results of molding Each step will be explained based on the configuration of . As for the two-color molding die, a die capable of molding the primary molding and the secondary molding described later may be appropriately selected and used.

(実施の形態1)
本発明の実施の形態1に係る二色成形物の製造方法について、図1~図4を参照しながら説明する。本実施の形態に係る二色成形物の製造方法の一次成形工程では、一次成形用のゲートG1から一次成形樹脂を充填することにより、例えば図1に示すような一次成形物1を成形する。
(Embodiment 1)
A method for manufacturing a two-color molding according to Embodiment 1 of the present invention will be described with reference to FIGS. 1 to 4. FIG. In the primary molding step of the method for manufacturing a two-color molded article according to the present embodiment, a primary molded article 1 as shown in FIG. 1, for example, is molded by filling the primary molding resin from the gate G1 for primary molding.

一次成形物1は、光学素子11と、光学素子11の側方から突出する突出部(タブ)12と、を有している。また、光学素子11および突出部12の内部には、両者を連通する穴部13が形成されている(図4参照)。この穴部13には、二次成形工程の際に二色成形金型(図示省略)のピンが挿入される。これにより、当該ピンによって一次成形物1を支持しながら、二次成形が行われる。 The primary molding 1 has an optical element 11 and a projecting portion (tab) 12 projecting from the side of the optical element 11 . A hole portion 13 is formed inside the optical element 11 and the projecting portion 12 so as to communicate between the two (see FIG. 4). A pin of a two-color molding die (not shown) is inserted into the hole 13 during the secondary molding process. Thereby, the secondary molding is performed while the primary molding 1 is supported by the pins.

光学素子11は、円柱状に形成されている。また、光学素子11は、突出部12の上面に配置されており、突出部12の側面12aと連続しない側面11aと、突出部12の側面12aと連続する側面11bを有している。突出部12は、所定厚さを有する楕円状に形成されている。突出部12の上面には、一次成形用のゲートG1が設けられる。このゲートG1は、一次成形工程で一次成形樹脂を充填する際に設けられ、二次成形工程を行う前に除去(ゲート処理)される。なお、突出部12は、後記するように、その突出方向がゲートG2に向いている(図3参照)。 The optical element 11 is formed in a cylindrical shape. The optical element 11 is arranged on the upper surface of the projecting portion 12 and has a side surface 11 a that is not continuous with the side surface 12 a of the projecting portion 12 and a side surface 11 b that is continuous with the side surface 12 a of the projecting portion 12 . The projecting portion 12 is formed in an elliptical shape with a predetermined thickness. A gate G1 for primary molding is provided on the upper surface of the projecting portion 12 . This gate G1 is provided when the primary molding resin is filled in the primary molding process, and is removed (gate processing) before performing the secondary molding process. As will be described later, the projecting portion 12 faces the gate G2 (see FIG. 3).

本実施の形態に係る二色成形物の製造方法の二次成形工程では、二次成形用のゲートG2から二次成形樹脂を充填することにより、光学素子11の側面11a,11bおよび突出部12を二次成形樹脂によって埋め込み、例えば図2~図4に示すような二次成形物2を成形する。二次成形物2は、外観部21と、接続部22と、貫通孔23a,23b,24,25と、を有している。 In the secondary molding step of the method for manufacturing a two-color molded article according to the present embodiment, by filling the secondary molding resin from the secondary molding gate G2, the side surfaces 11a and 11b and the projecting portion 12 of the optical element 11 are formed. is embedded with a secondary molding resin to form a secondary molding 2 as shown in FIGS. 2 to 4, for example. The secondary molded product 2 has an appearance portion 21, a connection portion 22, and through holes 23a, 23b, 24, and 25. As shown in FIG.

外観部21は、一次成形物1の光学素子11とともに、光学デバイスの一部品である二色成形物3の外観を構成する。外観部21は、円柱状に形成されており、図4に示すように、二次成形工程の際に二色成形金型(図示省略)のピンが挿入される穴部27が形成されている。また、外観部21には、同径の貫通孔23a,23bが形成されている。これらの貫通孔23a,23bには、それぞれ一次成形物1が埋め込まれている。 The external appearance part 21 constitutes the external appearance of the two-color molded product 3 which is a part of the optical device together with the optical element 11 of the primary molded product 1 . The appearance part 21 is formed in a cylindrical shape, and as shown in FIG. 4, a hole part 27 is formed into which a pin of a two-color molding die (not shown) is inserted during the secondary molding process. . Further, through holes 23a and 23b having the same diameter are formed in the exterior portion 21. As shown in FIG. The primary molding 1 is embedded in each of these through holes 23a and 23b.

接続部22には、光学デバイスの他部品が接続される。接続部22は、円筒状に形成されており、図4に示すように、内部に穴部26が形成されている。また、接続部22の側面には、二次成形用のゲートG2が設けられる。このゲートG2は、二次成形工程で二次成形樹脂を充填する際に設けられ、二次成形工程の完了後、すなわち二色成形物3の製造後に除去(ゲート処理)される。 Other parts of the optical device are connected to the connecting portion 22 . The connection portion 22 is formed in a cylindrical shape, and as shown in FIG. 4, a hole portion 26 is formed inside. A gate G2 for secondary molding is provided on the side surface of the connecting portion 22 . This gate G2 is provided when the secondary molding resin is filled in the secondary molding process, and is removed (gate processing) after the secondary molding process is completed, that is, after the two-color molding 3 is manufactured.

ゲートG2は、図3に示すような平面視において、接続部22の外周面と貫通孔24,25の内周面とが接近した薄肉部(同図のB部参照)を避けた位置に設けられる。これにより、二次成形の際に、一次成形物1の突出部12と二次成形物2の表面2aとの間の薄肉部(図4のD部参照)の領域に二次成形樹脂を充填しやすくなる。また、ゲートG2は、図4に示すように、薄肉部(同図のD部参照)が、二次成形工程における二次成形樹脂の流れ(同図の矢印C参照)の上流側となる位置に設けられる。 The gate G2 is provided at a position avoiding a thin portion (see section B in FIG. 3) where the outer peripheral surface of the connecting portion 22 and the inner peripheral surfaces of the through holes 24 and 25 are close to each other in plan view as shown in FIG. be done. As a result, during the secondary molding, the secondary molding resin is filled in the area of the thin portion (see part D in FIG. 4) between the projecting portion 12 of the primary molding 1 and the surface 2a of the secondary molding 2. easier to do. Also, as shown in FIG. 4, the gate G2 is positioned such that the thin-walled portion (see section D in the same figure) is on the upstream side of the secondary molding resin flow (see arrow C in the same figure) in the secondary molding process. provided in

貫通孔24,25は、図3および図4に示すように、一次成形物1と重ならない位置において、外観部21および接続部22を貫通して形成されている。これらの貫通孔24,25には、光学デバイスの他部品(例えば鉗子、送気・送水チューブ、映像ケーブル等)が挿入される。 As shown in FIGS. 3 and 4, the through holes 24 and 25 are formed through the appearance portion 21 and the connection portion 22 at positions not overlapping the primary molding 1 . Other parts of the optical device (for example, forceps, air/water supply tubes, image cables, etc.) are inserted into these through holes 24 and 25 .

ここで、図3に示すような平面視において、例えば外観部21の直径は4.9mm、貫通孔23a,23bの直径d1は1.0mm、貫通孔24の直径d2は1.5mm、貫通孔25の直径d3は2.4mm、である。従って、二色成形物3において、外観部21の直径に対する貫通孔24,25の直径d2,d3の比は、0.3~0.5となる。また、図4に示すような断面視において、例えば二次成形物2の高さh1は7.65mm、外観部21の高さh2は2.2mmである。 Here, in a plan view as shown in FIG. 3, for example, the diameter of the appearance portion 21 is 4.9 mm, the diameter d1 of the through holes 23a and 23b is 1.0 mm, the diameter d2 of the through hole 24 is 1.5 mm, and the through hole 25 has a diameter d3 of 2.4 mm. Therefore, in the two-color molding 3, the ratio of the diameters d2 and d3 of the through holes 24 and 25 to the diameter of the outer appearance portion 21 is 0.3 to 0.5. Further, in a cross-sectional view as shown in FIG. 4, for example, the height h1 of the secondary molded product 2 is 7.65 mm, and the height h2 of the exterior portion 21 is 2.2 mm.

本実施の形態に係る二色成形物の製造方法の二次成形工程では、一次成形物1の突出部12の突出方向を二次成形用のゲートG2に向けて二次成形物2の成形を行う。ここで、「突出部12の突出方向を二次成形用のゲートG2に向けて」とは、図3に示すように、ゲートG2が設けられた方向DGに対して垂直、かつ一次成形物1の光学素子11の中心を通る直線Lよりも、ゲートG2の側に突出部12の突出方向を向けた状態のことを示している。本実施の形態に係る二色成形物の製造方法の二次成形工程では、同図に示すように、二つの一次成形物1のそれぞれの突出部12の突出方向を、二次成形用のゲートG2に向けて二次成形を行う。 In the secondary molding step of the method for manufacturing a two-color molded product according to the present embodiment, the secondary molded product 2 is molded with the projecting direction of the projecting portion 12 of the primary molded product 1 facing the gate G2 for secondary molding. conduct. Here, "the projecting direction of the projecting portion 12 is directed toward the secondary molding gate G2" means that, as shown in FIG. 2 shows a state in which the projecting direction of the projecting portion 12 is directed toward the gate G2 from the straight line L passing through the center of the optical element 11 in FIG. In the secondary molding step of the method for manufacturing a two-color molded product according to the present embodiment, as shown in the figure, the projecting directions of the projecting portions 12 of the two primary molded products 1 are aligned with the gate for secondary molding. Secondary molding is performed toward G2.

本実施の形態に係る二色成形物の製造方法では、図4に示すように、一次成形物1の突出部12と二次成形物2の表面2aとの間に薄肉部(同図のD部参照)が形成されるものの、突出部12の突出方向を二次成形用のゲートG2に向けて二次成形を行うことにより、同図の矢印Cに示すように、他の部分よりも先に、薄肉部の領域に二次成形樹脂が充填される。そして、薄肉部の領域において、二次成形樹脂が光学素子11の側面11aに衝突し、二次成形樹脂の流れが二つに分割される。 In the method for manufacturing a two-color molded product according to the present embodiment, as shown in FIG. 4, a thin portion (D ) is formed, but by performing secondary molding with the projecting direction of the projecting portion 12 directed toward the gate G2 for secondary molding, as shown by arrow C in the same figure, it is earlier than other portions. Secondly, the area of the thin portion is filled with the secondary molding resin. Then, in the region of the thin portion, the secondary molding resin collides with the side surface 11a of the optical element 11, and the flow of the secondary molding resin is split into two.

一次成形物1(光学素子11の側面11a)で分流した二次成形樹脂の流れは、光学素子11を回り込み、薄肉部以外の領域、すなわち光学素子11の側面11bの側で合流する。これにより、図3に示すように、薄肉部を避けてウェルドラインWLが形成されるため、二色成形物3の外観品質、強度および耐薬品性の低下を抑制することができる。 The flow of the secondary molding resin split at the primary molding 1 (side surface 11 a of the optical element 11 ) wraps around the optical element 11 and merges on the side surface 11 b side of the optical element 11 except for the thin portion. As a result, as shown in FIG. 3, the weld line WL is formed avoiding the thin-walled portion, so that deterioration of the appearance quality, strength and chemical resistance of the two-color molding 3 can be suppressed.

このように、本実施の形態に係る二色成形物の製造方法によれば、予め設定されている貫通孔23a,23b,24,25の直径および位置の制約や、二次性成形用のゲートG2の位置の制約等を満たしつつ、ゲートG2に対する突出部12の向きを最適に調整することにより、二次成形樹脂の流れを制御し、他の部分よりも強度の低い薄肉部以外の領域で二次成形樹脂を合流させることができる。 As described above, according to the method for manufacturing a two-color molded product according to the present embodiment, restrictions on the preset diameters and positions of the through holes 23a, 23b, 24, and 25 and gates for secondary molding By optimally adjusting the orientation of the protruding portion 12 with respect to the gate G2 while satisfying the restrictions on the position of G2, the flow of the secondary molding resin is controlled, and the area other than the thin portion having lower strength than other portions The secondary molding resin can be merged.

(実施の形態2)
本発明の実施の形態2に係る二色成形物の製造方法について、図5および図6を参照しながら説明する。本実施の形態に係る二色成形物の製造方法の一次成形工程では、実施の形態1と同様の方法により、図1に示した一次成形物1を成形する。一方、二次成形工程では、一次成形物1の突出部12の突出方向を実施の形態1とは異なる方向に向け、二次成形用のゲートG2から二次成形樹脂を充填することにより、外観部21A、接続部22および貫通孔23a,23b,24A,25を有する二次成形物2Aを成形する。
(Embodiment 2)
A method for manufacturing a two-color molding according to Embodiment 2 of the present invention will be described with reference to FIGS. 5 and 6. FIG. In the primary molding step of the method for manufacturing a two-color molded article according to the present embodiment, the primary molded article 1 shown in FIG. 1 is molded by the same method as in the first embodiment. On the other hand, in the secondary molding step, the projecting direction of the projecting portion 12 of the primary molded product 1 is directed in a different direction from that of the first embodiment, and the secondary molding resin is filled from the gate G2 for secondary molding, thereby improving the appearance. A secondary molded product 2A having a portion 21A, a connecting portion 22 and through holes 23a, 23b, 24A and 25 is formed.

二次成形物2Aでは、図6に示すように、上側の一次成形物1(貫通孔23a)の近傍に貫通孔24Aが配置されている。貫通孔23a,24Aがこのような位置関係である場合、二次成形工程では、貫通孔23aに配置される一次成形物1の突出部12を、貫通孔24Aと貫通孔25との間に配置し、下側の一次成形物1(貫通孔23b)の近傍に設けた二次成形用のゲートG2から二次成形樹脂を充填することにより、二次成形物2Aの成形を行う。 In the secondary molded product 2A, as shown in FIG. 6, a through hole 24A is arranged in the vicinity of the upper primary molded product 1 (through hole 23a). When the through-holes 23a and 24A have such a positional relationship, in the secondary molding step, the protruding portion 12 of the primary molded product 1 arranged in the through-hole 23a is arranged between the through-hole 24A and the through-hole 25. Then, the secondary molding 2A is molded by filling the secondary molding resin from the secondary molding gate G2 provided near the lower primary molding 1 (through hole 23b).

これにより、他の部分よりも先に、一次成形物1の突出部12と二次成形物2Aの表面2aとの間の薄肉部に二次成形樹脂が充填され、一次成形物1によって分流した二次成形樹脂の流れが、薄肉部以外の領域で合流し、当該薄肉部を避けてウェルドラインWLが形成される。すなわち図6に示すように、一次成形物1の突出部12の突出方向をそれぞれ異なる方向に向けた場合であっても、薄肉部を避けてウェルドラインWLが形成されることになる。従って、二色成形物3Aの外観品質、強度および耐薬品性の低下を抑制することができる。 As a result, the secondary molding resin is filled in the thin portion between the projecting portion 12 of the primary molding 1 and the surface 2a of the secondary molding 2A prior to other portions, and is divided by the primary molding 1. The flow of the secondary molding resin merges in areas other than the thin-walled portion, and the weld line WL is formed avoiding the thin-walled portion. That is, as shown in FIG. 6, even if the projecting directions of the projecting portions 12 of the primary molded product 1 are directed in different directions, the weld line WL is formed avoiding the thin portion. Therefore, deterioration of appearance quality, strength and chemical resistance of the two-color molding 3A can be suppressed.

(実施の形態3)
本発明の実施の形態3に係る二色成形物の製造方法について、図7および図8を参照しながら説明する。本実施の形態に係る二色成形物の製造方法の一次成形工程では、実施の形態1と同様の方法により、図1に示した一次成形物1を成形する。一方、二次成形工程では、一次成形物1の突出部12の突出方向を実施の形態1,2とは異なる方向に向け、かつ二か所に設けた二次成形用のゲートG21,G22から二次成形樹脂を充填することにより、外観部21B、接続部22および貫通孔23a,23b,24B,25Bを有する二次成形物2Bを成形する。
(Embodiment 3)
A method for manufacturing a two-color molding according to Embodiment 3 of the present invention will be described with reference to FIGS. 7 and 8. FIG. In the primary molding step of the method for manufacturing a two-color molded article according to the present embodiment, the primary molded article 1 shown in FIG. 1 is molded by the same method as in the first embodiment. On the other hand, in the secondary molding step, the projecting direction of the projecting portion 12 of the primary molded product 1 is directed in a direction different from that of the first and second embodiments, and from the gates G21 and G22 for secondary molding provided at two locations. By filling the secondary molded resin, the secondary molded product 2B having the appearance portion 21B, the connection portion 22 and the through holes 23a, 23b, 24B, 25B is molded.

二次成形物2Bでは、図8に示すように、実施の形態1(図3参照)と比較して、貫通孔24B,25Bの径が拡大している。この場合、二次成形樹脂の充填性が悪化するため、接続部22の位置に二つの二次成形用のゲートG21,G22を設け、二か所から二次成形樹脂を充填する。 In the secondary molded product 2B, as shown in FIG. 8, the diameters of the through holes 24B and 25B are enlarged as compared with the first embodiment (see FIG. 3). In this case, since the filling property of the secondary molding resin deteriorates, two gates G21 and G22 for secondary molding are provided at the position of the connection portion 22, and the secondary molding resin is filled from two places.

また、貫通孔24B,25Bの径が大きい場合、二次成形工程では、貫通孔23a,23bにそれぞれ配置される一次成形物1の突出部12の突出方向を、外側に向ける。これは、図8に示すように、外観部21Aの面積に対する貫通孔24B,25Bの割合が大きく、突出部12を配置できる領域が限られているためである。また、二次成形工程では、貫通孔23aに配置された上側の一次成形物1の突出部12の突出方向を、ゲートG21に向け、貫通孔23bに配置された下側の一次成形物1の突出部12の突出方向を、ゲートG22に向ける。そして、二つの二次成形用のゲートG21,G22から二次成形樹脂を充填することにより、二次成形物2Bの成形を行う。 Further, when the diameters of the through holes 24B and 25B are large, in the secondary molding step, the projecting direction of the projecting portions 12 of the primary molded product 1 respectively arranged in the through holes 23a and 23b is directed outward. This is because, as shown in FIG. 8, the ratio of the through holes 24B and 25B to the area of the exterior portion 21A is large, and the area in which the projecting portion 12 can be arranged is limited. Further, in the secondary molding step, the protruding direction of the protruding portion 12 of the upper primary molded product 1 disposed in the through hole 23a is directed toward the gate G21, and the lower primary molded product 1 disposed in the through hole 23b is oriented toward the gate G21. The projecting direction of the projecting portion 12 is directed toward the gate G22. Then, the secondary molding 2B is molded by filling the secondary molding resin from the two secondary molding gates G21 and G22.

これにより、他の部分よりも先に、一次成形物1の突出部12と二次成形物2Bの表面2aとの間の薄肉部に二次成形樹脂が充填され、一次成形物1によって分流した二次成形樹脂の流れが、薄肉部以外の領域で合流し、当該薄肉部を避けてウェルドラインWLが形成される。すなわち図8に示すように、二次成形樹脂の充填性を確保するために二つの二次成形用のゲートG21,G22を設けた場合であっても、薄肉部を避けてウェルドラインWLが形成されることになる。従って、二色成形物3Bの外観品質、強度および耐薬品性の低下を抑制することができる。 As a result, the secondary molding resin is filled in the thin portion between the projecting portion 12 of the primary molding 1 and the surface 2a of the secondary molding 2B prior to other portions, and is divided by the primary molding 1. The flow of the secondary molding resin merges in areas other than the thin-walled portion, and the weld line WL is formed avoiding the thin-walled portion. That is, as shown in FIG. 8, even when two secondary molding gates G21 and G22 are provided to ensure the filling property of the secondary molding resin, the weld line WL is formed avoiding the thin portion. will be Therefore, deterioration of appearance quality, strength and chemical resistance of the two-color molding 3B can be suppressed.

(実施の形態4)
本発明の実施の形態4に係る二色成形物の製造方法について、図9および図10を参照しながら説明する。本実施の形態に係る二色成形物の製造方法の一次成形工程では、実施の形態1と同様の方法により、図1に示した一次成形物1を成形する。一方、二次成形工程では、一次成形物1の突出部12の突出方向を、実施の形態1~3とは異なる方向に向け、かつ二か所に設けた二次成形用のゲートG21,G22から二次成形樹脂を充填することにより、外観部21C、接続部22Cおよび貫通孔23a,23b,24B,25Bを有する二次成形物2Bを成形する。
(Embodiment 4)
A method for manufacturing a two-color molding according to Embodiment 4 of the present invention will be described with reference to FIGS. 9 and 10. FIG. In the primary molding step of the method for manufacturing a two-color molded article according to the present embodiment, the primary molded article 1 shown in FIG. 1 is molded by the same method as in the first embodiment. On the other hand, in the secondary molding step, the projecting direction of the projecting portion 12 of the primary molded product 1 is directed to a direction different from that of the first to third embodiments, and the gates G21 and G22 for secondary molding provided at two locations are A secondary molded product 2B having an exterior portion 21C, a connecting portion 22C, and through holes 23a, 23b, 24B, and 25B is formed by filling the secondary molding resin from the inside.

二次成形物2Cでは、図8に示すように、実施の形態1(図3参照)と比較して、貫通孔24B,25Bの径が拡大している。また、二次成形物2Cでは、接続部22Cの側面に組立用形状28が設けられており、ゲートG21,G22を配置する位置が制限されている。 In the secondary molded product 2C, as shown in FIG. 8, the diameters of the through holes 24B and 25B are enlarged as compared with the first embodiment (see FIG. 3). Further, in the secondary molded product 2C, an assembly shape 28 is provided on the side surface of the connecting portion 22C, and the positions where the gates G21 and G22 are arranged are restricted.

このように貫通孔24B,25Bの径が大きく、かつ組立用形状28によりゲートG21,G22を配置する位置が制限されている場合、二次成形工程では、組立用形状28を避けてゲートG21,G22を配置し、かつ貫通孔23aに配置された上側の一次成形物1の突出部12の突出方向をゲートG21に向け、貫通孔23bに配置された下側の一次成形物1の突出部12の突出方向をゲートG22に向ける。そして、二つの二次成形用のゲートG21,G22から二次成形樹脂を充填することにより、二次成形物2Bの成形を行う。 When the diameters of the through holes 24B and 25B are large and the positions where the gates G21 and G22 are arranged are restricted by the shape for assembly 28, the gates G21 and G21, G21 and G22 are formed by avoiding the shape for assembly 28 in the secondary molding process. G22 is arranged, and the projecting direction of the projecting portion 12 of the upper primary molded product 1 located in the through hole 23a is directed toward the gate G21, and the projecting portion 12 of the lower primary molded product 1 located in the through hole 23b toward the gate G22. Then, the secondary molding 2B is molded by filling the secondary molding resin from the two secondary molding gates G21 and G22.

これにより、他の部分よりも先に、一次成形物1の突出部12と二次成形物2Cの表面2aとの間の薄肉部に二次成形樹脂が充填され、一次成形物1によって分流した二次成形樹脂の流れが、薄肉部以外の領域で合流し、当該薄肉部を避けてウェルドラインWLが形成される。すなわち図10に示すように、ゲートG21,G22を配置する位置が制限されている場合であっても、薄肉部を避けてウェルドラインWLが形成されることになる。従って、二色成形物3Cの外観品質、強度および耐薬品性の低下を抑制することができる。 As a result, the secondary molding resin is filled in the thin portion between the projecting portion 12 of the primary molding 1 and the surface 2a of the secondary molding 2C prior to other portions, and is divided by the primary molding 1. The flow of the secondary molding resin merges in areas other than the thin-walled portion, and the weld line WL is formed avoiding the thin-walled portion. That is, as shown in FIG. 10, even if the positions where the gates G21 and G22 are arranged are restricted, the weld lines WL are formed avoiding the thin portions. Therefore, deterioration of appearance quality, strength and chemical resistance of the two-color molding 3C can be suppressed.

以上、本発明に係る二色成形物の製造方法および二色成形物について、発明を実施するための形態により具体的に説明したが、本発明の趣旨はこれらの記載に限定されるものではなく、特許請求の範囲の記載に基づいて広く解釈されなければならない。また、これらの記載に基づいて種々変更、改変等したものも本発明の趣旨に含まれることはいうまでもない。 As described above, the method for producing a two-color molded product and the two-color molded product according to the present invention have been specifically described by the mode for carrying out the invention, but the gist of the present invention is not limited to these descriptions. , should be interpreted broadly based on the claims. Further, it goes without saying that various changes and alterations based on these descriptions are also included in the gist of the present invention.

1 一次成形物
11 光学素子
11a,11b 側面
12 突出部
12a 側面
13 穴部
2,2A,2B,2C 二次成形物
2a 表面
21,21A,21B,21C 外観部
22,22C 接続部
23a,23b,24,24A,24B,25,25B 貫通孔
26,27 穴部
28 組立用形状
3,3A,3B,3C 二色成形物
d1,d2,d3 直径
G1,G2,G21,G22 ゲート
h1,h2 高さ
WL ウェルドライン
REFERENCE SIGNS LIST 1 primary molding 11 optical element 11a, 11b side surface 12 protrusion 12a side surface 13 hole 2, 2A, 2B, 2C secondary molding 2a surface 21, 21A, 21B, 21C appearance portion 22, 22C connecting portion 23a, 23b, 24, 24A, 24B, 25, 25B Through hole 26, 27 Hole 28 Assembly shape 3, 3A, 3B, 3C Two-color molding d1, d2, d3 Diameter G1, G2, G21, G22 Gate h1, h2 Height WL Weld line

Claims (6)

ゲートから二次成形樹脂を充填することにより、一次成形物を構成する光学素子の側面と、前記光学素子の側方から一つの方向に突出する突出部とを前記二次成形樹脂によって埋め込み、二次成形物を成形し、
前記二次成形物の成形は、前記光学素子の光軸方向から見た平面視において、前記突出部の突出方向を前記ゲートに向けて行い、
前記一次成形物および前記二次成形物からなる二色成形物は、光学デバイスの一部品を構成し、
前記二次成形物は、
前記一次成形物が埋め込まれ、前記光学素子とともに前記光学デバイスの外観を構成する外観部と、
前記ゲートが設けられ、前記光学デバイスの他部品が接続される接続部と、
前記一次成形物と重ならない位置において、前記外観部および前記接続部を貫通して形成される貫通孔と、
を有する、
二色成形物の製造方法。
By filling the secondary molding resin from the gate, the side surface of the optical element constituting the primary molding and the projecting portion projecting in one direction from the side of the optical element are embedded with the secondary molding resin. molding the next molding,
The secondary molded product is molded so that the projecting direction of the projecting portion faces the gate in a plan view viewed from the optical axis direction of the optical element,
A two-color molded product composed of the primary molded product and the secondary molded product constitutes a part of an optical device,
The secondary molded product is
an exterior portion in which the primary molding is embedded and which forms an exterior of the optical device together with the optical element;
a connecting portion provided with the gate and connected to other components of the optical device;
a through hole formed through the exterior portion and the connection portion at a position not overlapping the primary molded product;
having
A method for producing a two-color molding.
前記二次成形物の成形は、平面視において、前記接続部の外周面と前記貫通孔の内周面とが接近した薄肉部を避けた位置に設けられたゲートから、前記二次成形樹脂を注入する請求項1に記載の二色成形物の製造方法。 In the molding of the secondary molded product, the secondary molded resin is passed through a gate provided at a position avoiding a thin portion where the outer peripheral surface of the connecting portion and the inner peripheral surface of the through hole are close to each other in plan view. The method for producing a two-color molding according to claim 1, wherein the injection is performed. 前記二次成形物の成形の前に、前記突出部に設けられた一次成形用のゲートから一次成形樹脂を充填することにより、前記一次成形物を成形する請求項1または請求項2に記載の二色成形物の製造方法。 3. The primary molding according to claim 1 or 2, wherein the primary molding is molded by filling the primary molding resin through a gate for primary molding provided in the projecting portion before molding the secondary molding. A method for producing a two-color molding. 前記外観部の直径に対する前記貫通孔の直径の比は、0.3~0.5である請求項1から請求項3のいずれか一項に記載の二色成形物の製造方法。 The method for producing a two-color molded product according to any one of claims 1 to 3, wherein the ratio of the diameter of the through-holes to the diameter of the appearance portion is 0.3 to 0.5. 光学素子と、前記光学素子を保持するように前記光学素子と一体に成形され、前記光学素子に隣接する位置に貫通孔を有する二次成形物と、からなる二色成形物の製造方法において、
前記光学素子と前記光学素子の光軸に直交する一つの方向に突出する突出部とを有する一次成形物を成形する第一の工程と、
前記一次成形物の周囲に二次成形金型のゲートから二次成形樹脂を充填して前記一次成形物と前記二次成形樹脂とが一体となった二色成形物を形成する第二の工程と、
を有し、
前記二次成形樹脂が前記二次成形金型に充填される過程として流動する際に、前記一次成形物においては前記突出部が、最初に流動する前記二次成形樹脂に接触するように、前記突出部の突出方向と前記二次成形金型のゲートとが配置されている、
二色成形物の製造方法。
A method for producing a two-color molded article, comprising: an optical element; and a secondary molded article integrally molded with the optical element so as to hold the optical element and having a through hole at a position adjacent to the optical element,
a first step of molding a primary molded product having the optical element and a projecting portion projecting in one direction perpendicular to the optical axis of the optical element;
A second step of filling the secondary molding resin around the primary molding from the gate of the secondary molding die to form a two-color molding in which the primary molding and the secondary molding resin are integrated. When,
has
When the secondary molding resin flows in the process of filling the secondary molding die, the protrusions in the primary molded product first come into contact with the secondary molding resin that flows. The projecting direction of the projecting portion and the gate of the secondary molding die are arranged,
A method for producing a two-color molding.
光学デバイスの一部品を構成し、
光学素子、および、前記光学素子の側方から前記光学素子の光軸方向に直交する一つの方向に突出する突出部を有する一次成形物と、
前記一次成形物が埋め込まれ、前記光学素子とともに前記光学デバイスの外観を構成する外観部、
二次成形樹脂を充填するゲートが設けられ、前記光学デバイスの他部品が接続される接続部、
前記一次成形物と重ならない位置において、前記外観部および前記接続部を貫通して形成される貫通孔、
を有する二次成形物と、
を備え、
前記突出部は、突出方向が、前記光学素子の光軸方向から見た平面視において、前記ゲートが設けられた方向に向いている、
二色成形物。
constitutes a part of an optical device,
a primary molded product having an optical element and a projecting portion projecting from the side of the optical element in one direction orthogonal to the optical axis direction of the optical element;
an exterior portion in which the primary molding is embedded and which forms an exterior of the optical device together with the optical element;
a connecting portion provided with a gate filled with secondary molding resin and connected to other parts of the optical device;
A through hole formed through the exterior portion and the connecting portion at a position not overlapping the primary molded product;
a secondary molding having
with
The projecting portion has a projecting direction that faces the direction in which the gate is provided in a plan view seen from the optical axis direction of the optical element.
Two-color molding.
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Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2011111242A1 (en) 2010-03-09 2011-09-15 オリンパス株式会社 Method for producing resin molded article, resin molded article, resin molded article for endoscope, endoscope using resin molded article, and apparatus for producing the resin molded article
JP2012218331A (en) 2011-04-11 2012-11-12 Olympus Corp Molding die for multicolour molding, method for molding multicoloured molded article, and multicoloured molded article

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP3764512B2 (en) * 1995-10-17 2006-04-12 オリンパス株式会社 Endoscopic optical components

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2011111242A1 (en) 2010-03-09 2011-09-15 オリンパス株式会社 Method for producing resin molded article, resin molded article, resin molded article for endoscope, endoscope using resin molded article, and apparatus for producing the resin molded article
JP2012218331A (en) 2011-04-11 2012-11-12 Olympus Corp Molding die for multicolour molding, method for molding multicoloured molded article, and multicoloured molded article

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