JP2007296801A

JP2007296801A - Method for producing molded product having liquid flow path inside and molded product

Info

Publication number: JP2007296801A
Application number: JP2006128318A
Authority: JP
Inventors: Shozo Nishida; 正三西田
Original assignee: Japan Steel Works Ltd
Current assignee: Japan Steel Works Ltd
Priority date: 2006-05-02
Filing date: 2006-05-02
Publication date: 2007-11-15
Anticipated expiration: 2026-05-02
Also published as: JP4140973B2

Abstract

【課題】インク漏れのないインク容器固定部材の製造方法を提供する。
【解決手段】１次成形により、インク容器固定部材の底板の方に２次成形用の溶融樹脂が充填される凹溝を、補助板の方にインク流路が構成される凹溝をそれぞれ成形し、底板と補助板とを整合させて凹溝により構成される樹脂流路（１）に２次成形用の溶融樹脂を充填して底板と補助板とを融着してインク流路を成形するとき、樹脂流路（１）に可動堰（２）を挿入して樹脂流路（１）を一時的に阻止面（５）により閉鎖し、可動堰（２）の阻止面（５）の近傍（１０）から２次成形用の溶融樹脂を射出し、射出する溶融樹脂が可動堰（２）の作用面（６）に達すると、その圧力により可動堰（６）を退避させ、退避した跡にも充填し、連続した閉断面形状の樹脂流路（１）を一方向から実質的に完全に充填してインク流路を形成する。
【選択図】図１
PROBLEM TO BE SOLVED: To provide a method for manufacturing an ink container fixing member free from ink leakage.
SOLUTION: A primary groove is formed with a concave groove filled with molten resin for secondary molding toward the bottom plate of the ink container fixing member, and a concave groove with an ink flow path is formed toward the auxiliary plate. Then, the bottom plate and the auxiliary plate are aligned to fill the resin flow path (1) constituted by the concave groove with a molten resin for secondary molding, and the bottom plate and the auxiliary plate are fused to form the ink flow path. When the movable weir (2) is inserted into the resin flow path (1), the resin flow path (1) is temporarily closed by the blocking surface (5), and the blocking surface (5) of the movable weir (2) is closed. When the molten resin for secondary molding is injected from the vicinity (10) and the injected molten resin reaches the working surface (6) of the movable weir (2), the movable weir (6) is retreated by the pressure and retreated. The ink flow path is also formed by filling the traces and filling the continuous closed cross-section resin flow path (1) substantially completely from one direction.
[Selection] Figure 1

Description

本発明は、所定面積の第１の板体と第２の板体とが接合されると、前記第１の板体と第２の板体との間に液体流路が形成される、内部に液体流路を有する成形品の製造方法および成形品に関するもので、特にプリンタに内蔵されているインク容器が着脱自在に固定されるインク容器固定部材に適用して好適な成形品の製造方法および成形品にを関するものである。 In the present invention, when the first plate and the second plate having a predetermined area are joined, a liquid flow path is formed between the first plate and the second plate. In particular, the present invention relates to a method of manufacturing a molded product having a liquid flow path and a molded product, and particularly to a method of manufacturing a molded product suitable for application to an ink container fixing member to which an ink container built in a printer is detachably fixed, and It relates to molded products.

カラープリンタは、複数色例えば６色のインクがそれぞれ収納されている６個のインク容器を備えている。そして、これらのインク容器は、インク容器固定部材５０に保持されている。このようなインク容器固定部材５０は、特許文献１にも示されているが、概略図４の（イ）に示されているように構成されている。すなわち、底壁５１と、この底壁５１の４辺から立ち上がっている両側壁５２、５２と前後壁５３、５４とから全体として略箱状を呈するように構成され、内部は仕切板５５、５５、…により、上方が開口した６個の容器室５６、５６、…に仕切られている。そして、図４には示されていないが６個のインク容器は、これらの容器室５６、５６、…に上方から着脱自在に装着され、位置決めされるようになっている。 The color printer includes six ink containers each storing a plurality of colors, for example, six colors of ink. These ink containers are held by the ink container fixing member 50. Such an ink container fixing member 50 is also shown in Patent Document 1, but is configured as shown in FIG. That is, the bottom wall 51, the side walls 52, 52 rising from the four sides of the bottom wall 51, and the front and rear walls 53, 54 are configured to have a substantially box shape as a whole, and the inside is a partition plate 55, 55. ,... Are partitioned into six container chambers 56, 56,. Although not shown in FIG. 4, the six ink containers are detachably attached to these container chambers 56, 56,... From above and positioned.

このように構成されているインク容器固定部材５０の容器室５６、５６、…のそれぞれには、それぞれのインク容器中のインクを受けるインク受口５７、５７、…が設けられている。図４の（ロ）は、インク容器固定部材５０を下方から見た底面図であるが、この図に示されているように、インク容器固定部材５０の底壁５１には６個のインクノズル５８、５８、…が外方、すなわち図４の（イ）において下方へ延びるようにして設けられている。そして、前述した６個のインク受口５７、５７、…は、６個のインクノズル５８、５８、…とインク流路６０、６０、…でそれぞれ接続されている。これらのインク流路６０、６０、…は、６個のインク受口５７、５７、…が間隔があるのに対し、６個のインクノズル５８、５８、…は互いに近接して設けられているので、図４の（ロ）に示されているように、屈曲している。 Each of the container chambers 56, 56,... Of the ink container fixing member 50 configured as described above is provided with ink receiving ports 57, 57,. 4B is a bottom view of the ink container fixing member 50 as viewed from below. As shown in FIG. 4, six ink nozzles are provided on the bottom wall 51 of the ink container fixing member 50. As shown in FIG. 58, 58,... Are provided so as to extend outward, that is, downward in FIG. The six ink receiving ports 57, 57,... Are connected to the six ink nozzles 58, 58,. In the ink flow paths 60, 60,..., Six ink receiving ports 57, 57,... Are spaced, but the six ink nozzles 58, 58,. Therefore, it is bent as shown in FIG.

このように屈曲している６個のインク流路６０、６０、…は、底壁５１の内部に形成されている。具体的には、図４の（ハ）は図４の（ロ）において矢視ハ−ハ方向に見た断面図であるが、この断面図に示されているように、インク流路６０、６０が形成される部分の底壁５１は、底板６１とこの底板６１に重ねられている覆板６２とからなる積層構造になっており、覆板６２の方に凹溝６３が形成されている。したがって、底板６１に覆板６２を接合すると、閉断面形状のインク流路６０、６０が形成される。合成樹脂の接合方法には電磁誘導発熱による接合方法、レーザー光による接合方法等が知られているが、上記のような底板６１と覆板６２との接合には超音波プラスチック溶着装置が適用されている。実際には、図５の（イ）に示されているように、覆板６２の方にインク流路用の凹溝６３、６３と、この凹溝６３、６３を挟む形で下方へ突出した一対のリブ６４、６４が成形され、一方底板６１の方には覆板６２のリブ６４、６４に対応した所定大きさの凹溝６５、６５が成形されている。そして、図５の（イ）に示されているように、底板６１に覆板６２を整合させ加圧しながら１５〜７０ｋＨｚの超音波の振動エネルギを加えると、そのエネルギでリブ６４、６４の先端部から溶融が始まり、覆板６２は底板６１に溶着される。これにより、図５の（ロ）に示されているように底壁５１の内部にインク流路６０、６０、…が形成される。 The six ink flow paths 60, 60,... Bent in this way are formed inside the bottom wall 51. Specifically, (c) in FIG. 4 is a cross-sectional view as viewed in the direction of the arrow ha in FIG. 4 (b). As shown in the cross-sectional view, the ink flow path 60, The bottom wall 51 of the portion where 60 is formed has a laminated structure including a bottom plate 61 and a cover plate 62 superimposed on the bottom plate 61, and a concave groove 63 is formed toward the cover plate 62. . Therefore, when the cover plate 62 is joined to the bottom plate 61, the ink channels 60 and 60 having a closed cross-sectional shape are formed. As a synthetic resin joining method, a joining method using electromagnetic induction heat generation, a joining method using laser light, and the like are known. For joining the bottom plate 61 and the cover plate 62 as described above, an ultrasonic plastic welding apparatus is applied. ing. Actually, as shown in FIG. 5 (a), the cover plate 62 protrudes downward in the form of concave grooves 63, 63 for the ink flow path and the concave grooves 63, 63 sandwiched therebetween. A pair of ribs 64, 64 are formed, and a concave groove 65, 65 of a predetermined size corresponding to the ribs 64, 64 of the cover plate 62 is formed on the bottom plate 61. As shown in FIG. 5A, when the vibration energy of ultrasonic waves of 15 to 70 kHz is applied while the cover plate 62 is aligned with the bottom plate 61 and pressed, the tips of the ribs 64 and 64 are applied with the energy. Melting starts from the part, and the cover plate 62 is welded to the bottom plate 61. As a result, ink flow paths 60, 60,... Are formed inside the bottom wall 51 as shown in FIG.

特開平６−３２０８３０号公報JP-A-6-320830 特公平２−３８３７７号公報Japanese Examined Patent Publication No. 2-38377 特開平７−１９５４２１号公報JP-A-7-195421 特開平１０−１６０６５号公報JP-A-10-16065

このように超音波プラスチック溶着装置を利用すると、インク容器固定部材５０の底壁５１にインク流路６０、６０、…を形成することができるが、色々な欠点もある。例えば、インク容器固定部材５０と覆板６２は、あらかじめ成形されているので、合成樹脂特有の経時変化による収縮、ソリ等の変形が生じ、微細なインク流路６０、６０、…の成形が困難になることがある。また、変形のため超音波プラスチック溶着時に溶着ムラが生じ、不安定な溶着になることもある。さらには、完全に固化したインク容器固定部材５０と覆板６２に振動エネルギを印加し、その自己発熱により溶着させるので、工場内の湿度・温度等の外乱の影響を受けやすく、厳しい環境管理が要求される欠点もある。また、あらかじめ成形されているので、在庫管理が必要となり、一時保管、溶着加工に必要な箇所への移動等のため外傷を受けやすく、自動成形が困難な状況にもある。さらには、溶着時にインク流路６０、６０、…の内側へ樹脂がハミダシあるいは粉が発生し、不良品が出たり、高精度のインク流路６０、６０、…の成形が困難になる等の問題もある。このような成形不良が生じるので、インク容器固定部材５０のリーク検査および目詰まり検査が必要となり、生産工程以外の検査工程に多額の費用がかかる欠点もある。 When the ultrasonic plastic welding apparatus is used in this way, the ink flow paths 60, 60,... Can be formed in the bottom wall 51 of the ink container fixing member 50, but there are various drawbacks. For example, since the ink container fixing member 50 and the cover plate 62 are preliminarily molded, deformation such as shrinkage and warping due to the time-dependent change of the synthetic resin occurs, and it is difficult to mold the fine ink channels 60, 60,. It may become. Further, due to deformation, uneven welding may occur during ultrasonic plastic welding, resulting in unstable welding. Furthermore, vibration energy is applied to the completely solidified ink container fixing member 50 and the cover plate 62 and welded by its own heat generation, so that it is easily affected by disturbances such as humidity and temperature in the factory, and strict environmental management is possible. There are also required drawbacks. In addition, since it is pre-molded, inventory management is required, and it is easily damaged by automatic storage due to temporary storage, movement to a location necessary for welding, and the like. Further, when the welding is performed, the resin is sprinkled or powdered inside the ink flow paths 60, 60,..., Resulting in defective products, and difficult formation of the high-precision ink flow paths 60, 60,. There is also a problem. Since such a molding defect occurs, the ink container fixing member 50 needs to be inspected for leaks and clogged, and there is a disadvantage that a large amount of cost is required for inspection processes other than the production process.

上記のように、超音波プラスチック溶着装置により接合する方法には問題が多いので、他の接合方法、特に射出成形により接合あるいは溶着法を採用することが考えられる。射出成形による接合方法としてＤＳＩ法すなわちダイ・スライド・インジェクション法が知られている。このＤＳＩ法は、特許文献１、２等により多数提案されているように、固定金型と、この固定金型に対して型締めされると共に第１の位置と第２の位置との間をスライド的に駆動される可動金型とを使用し、一対の半成形品を成形する１次成形と、１次成形で成形された半成形品を接合する２次成形とからなっている。さらに詳しくは、可動金型を第１の位置にして一対の半成形品を、その突き合わせ面に接合用の凹溝を成形する１次成形と、この１次成形後可動金型を開いて一対の半成形品がそれぞれの金型に残った状態で可動金型を一対の半成形品の突き合わせ面が整合する第２の位置へスライド的に駆動して型締めし、そして接合用の凹溝により構成される閉断面形状の樹脂流路に溶融樹脂を射出充填する２次成形とからなっている。 As described above, since there are many problems in the method of joining with an ultrasonic plastic welding apparatus, it is conceivable to employ another joining method, particularly joining or welding by injection molding. A DSI method, that is, a die slide injection method is known as a joining method by injection molding. As many DSI methods are proposed in Patent Documents 1 and 2, etc., the fixed mold is clamped with respect to the fixed mold, and between the first position and the second position. It consists of primary molding for molding a pair of semi-molded products using a movable mold that is driven in a sliding manner, and secondary molding for joining the semi-molded products molded by the primary molding. More specifically, a pair of semi-molded products with the movable mold in the first position, primary molding for forming a concave groove for joining on the abutting surface, and a pair of molds by opening the movable mold after the primary molding. The movable mold is slidably driven to the second position where the butting surfaces of the pair of semi-molded parts are aligned, and the concave groove for joining is left with the half-molded articles remaining in the respective molds. And a secondary molding in which a molten resin is injected and filled in a closed cross-section shaped resin flow path.

このＤＳＩ法によると、一対の半成形品が金型内で接合されるので、各工程が自動化でき量産ができるという利点がある。また、複雑な成形品も高精度に成形できる利点もある。このようなＤＳＩ法のさらに改良された樹脂製多岐管の製造方法が特許文献４により提案されている。この製造方法によると、２次成形用の閉断面形状の樹脂流路は、ゲート部から溶融樹脂の流れ方向において離れるにつれて、通過断面積が大きくなるように設定されている。したがって、ゲート部から離れるにつれて２次成形用の溶融樹脂の充填量が多くなり、温度低下による２次成形用の溶融樹脂の流動性の低下を抑えることができる効果が認められる。 According to this DSI method, since a pair of semi-molded products are joined in a mold, there is an advantage that each process can be automated and mass production can be performed. Further, there is an advantage that even a complicated molded product can be molded with high accuracy. Patent Document 4 proposes a method for manufacturing a resin manifold which is further improved by such a DSI method. According to this manufacturing method, the closed cross-sectional shape resin flow path for secondary molding is set so that the passage cross-sectional area increases as the distance from the gate portion in the molten resin flow direction increases. Accordingly, as the distance from the gate portion increases, the filling amount of the molten resin for secondary molding increases, and an effect of suppressing a decrease in fluidity of the molten resin for secondary molding due to a temperature decrease is recognized.

以上のように、ＤＳＩ法は従来から多数提案され、また改良もされているが、以下に説明するように、このＤＳＩ法をインク流路の成形にそのまま適用しても所望の効果は得られない。すなわち、図５の（ハ）は前述したインク流路の模式的拡大図で、その（ニ）は図５の（ハ）において矢視ニーニ方向に見た断面図で、これらの図はＤＳＩ法により成形する例を示しているが、これらの図に示されているように、インク流路６０を挟んで２個の２次成形用の樹脂流路７０、７０、より正確には循環した２次成形用の樹脂流路７０が設けられているが、ゲート７１から充填される２次成形用の溶融樹脂は、矢印で示されているように、これらの樹脂流路７０、７０に分流する。そして、最終的に合流する。合流する点Ａには空気が溜まり、合流点Ａの近傍では溶着不良が生じる可能性がある。溶着が不完全であると、インク漏れが生じる。このようにインク漏れが生じる可能性もあるが、溶着不良が生じているか否かを知ることができないので、全品のリーク検査を必要とする欠点もある。また、インク流路６０、６０、…は、図４の（ロ）に示されているように６個設けられているので、６個のゲートから充填することになり、金型のゲート構造が複雑になり、実施する上で問題がある。 As described above, many DSI methods have been proposed and improved in the past. However, as described below, even if this DSI method is directly applied to the formation of an ink flow path, a desired effect can be obtained. Absent. That is, (c) in FIG. 5 is a schematic enlarged view of the above-described ink flow path, (d) is a cross-sectional view taken in the arrow Nini direction in (c) in FIG. However, as shown in these drawings, two secondary molding resin flow paths 70 and 70, more precisely 2 circulated with the ink flow path 60 in between. Although the resin channel 70 for the next molding is provided, the molten resin for the secondary molding filled from the gate 71 is divided into these resin channels 70 and 70 as indicated by arrows. . And finally join. Air accumulates at the joining point A, and there is a possibility that poor welding occurs in the vicinity of the joining point A. If the welding is incomplete, ink leakage occurs. Thus, there is a possibility that ink leakage may occur, but since it is impossible to know whether or not welding failure has occurred, there is also a drawback that a leak inspection of all products is required. In addition, since six ink flow paths 60, 60,... Are provided as shown in FIG. 4B, filling is performed from six gates, and the gate structure of the mold is It becomes complicated and has problems in implementation.

したがって、本発明は２次成形用の樹脂流路が長くても、実質的に完全に充填することができ、これによって液体の漏れのない、内部に液体流路を有する成形品の製造方法および成形品を提供することを目的としている。また、他の発明は、上記のような目的に加えてリーク検査、液体流路の目詰まり検査等を必要としない、内部に液体流路を有する成形品の製造方法および成形品を提供することを目的としている。さらに他の発明は、２次成形用の樹脂流路が長くても、実質的に完全に充填することができ、これによってインク漏れのないプリンタに内蔵されているインク容器を保持するインク容器固定部材からなる成形品の製造方法および成形品を提供することを目的としている。また、他の発明は、上記のような目的に加えてリーク検査、インク流路の目詰まり検査等を必要としない、底壁部にインク流路を有するインク容器固定部材からなる成形品の製造方法および成形品を提供することを目的としている Accordingly, the present invention provides a method for producing a molded product having a liquid flow path inside, which can be filled substantially completely even when the resin flow path for secondary molding is long, thereby preventing liquid leakage. The purpose is to provide molded products. In addition, in addition to the above-described object, another invention provides a method for manufacturing a molded product having a liquid flow channel therein and a molded product that do not require a leak test, a liquid flow channel clogging test, or the like. It is an object. Still another invention is an ink container fixing for holding an ink container built in a printer that can be substantially completely filled even if the resin flow path for secondary molding is long, thereby preventing ink leakage. It aims at providing the manufacturing method and molded product of the molded product which consists of members. In addition to the above-described object, another invention does not require a leak inspection, an ink flow path clogging inspection, etc., and manufactures a molded article comprising an ink container fixing member having an ink flow path on the bottom wall portion. Aims to provide a method and a molded article

本発明は、上記目的を達成するために、液体流路あるいはインク流路は、第１、２の板体を接合することにより、あるいは底体と補助板とを接合することにより、これらの板間に形成されるが、その接合に前述したＤＳＩ法が適用される。このとき、２次成形用の樹脂流路には可動堰が設けられる。これにより、２次成形用の樹脂流路は全長にわたって実質的に完全に充填され、液体あるいはインク漏れのない、内部に液体流路あるいはインク流路を有する成形品が製造される。また、可動堰の近傍に樹脂流路に開口した確認用の細孔あるいは透孔を設けることにより完全に充填された状態を確認できるように構成される。さらには、補助板を実質的に透明な合成樹脂により成形し、２次成形用の樹脂流路には有色な合成樹脂を射出、充填するように構成される。 In order to achieve the above object, according to the present invention, the liquid flow path or the ink flow path is obtained by joining the first and second plates, or by joining the bottom body and the auxiliary plate. The above-described DSI method is applied to the junction. At this time, a movable weir is provided in the resin flow path for secondary molding. As a result, the resin flow path for secondary molding is substantially completely filled over the entire length, and a molded product having a liquid flow path or an ink flow path inside without liquid or ink leakage is manufactured. Moreover, it is comprised so that the state with which it filled completely can be confirmed by providing the pore or the through-hole for confirmation opened to the resin flow path in the vicinity of the movable dam. Further, the auxiliary plate is formed of a substantially transparent synthetic resin, and a colored synthetic resin is injected and filled in a resin flow path for secondary molding.

かくして、請求項１に記載の発明は、上記目的を達成するために、所定面積の第１の板体と第２の板体とが接合されると前記第１の板体と第２の板体との間に液体流路が形成される成形品を、固定金型と、該固定金型に対して型締めされると共に第１の位置と第２の位置との間をスライド的に駆動される可動金型とを使用して製造する製造方法であって、前記可動金型が第１の位置にあるとき、前記第１、２の板体を、その接合面に液体流路用の凹溝と接合用の循環状の凹溝とを有するように成形する１次成形と、前記第１、２の板体がそれぞれの金型に残った状態で前記可動金型を第２の位置へ駆動して接合面を互いに突き合わせて型締めすることにより、前記接合用の循環状の凹溝により構成される連続した閉断面形状の樹脂流路に溶融樹脂を射出して、前記第１、２の板体を接合する２次成形とから内部に液体流路を有する成形品を得るとき、前記２次成形時に、前記連続した閉断面形状の樹脂流路に可動堰を挿入して前記樹脂流路を一時閉鎖しておき、前記可動堰の一側側の近傍から２次成形用の溶融樹脂を射出し、射出する溶融樹脂が前記可動堰の他側側に達するとその圧力により前記可動堰を退避させ、これにより連続した閉断面形状の樹脂流路を一方向から実質的に完全に充填して液体流路を形成するように構成される。
請求項２に記載の発明は、所定面積の第１の板体と第２の板体とが接合されると前記第１の板体と第２の板体との間に液体流路が形成される成形品を、固定金型と、該固定金型に対して型締めされる可動金型とを使用して製造する製造方法であって、前記第１、２の板体を、その接合面に液体流路用の凹溝と接合用の循環状の凹溝とを有するように成形し、成形された第１、２の板体を前記金型にインサートし、接合面を互いに突き合わせて型締めすることにより、前記接合用の循環状の凹溝により構成される連続した閉断面形状の樹脂流路に溶融樹脂を射出して、内部に液体流路を有する成形品を得るとき、前記連続した閉断面形状の樹脂流路に可動堰を挿入して前記樹脂流路を一時閉鎖しておき、前記可動堰の一側側の近傍から２次成形用の溶融樹脂を射出し、射出する溶融樹脂が前記可動堰の他側側に達するとその圧力により前記可動堰を退避させ、これにより連続した閉断面形状の樹脂流路を一方向から実質的に完全に充填して液体流路を形成するように構成される。そして、請求項３に記載の発明は、請求項１または２に記載の製造方法において、可動堰の近傍に樹脂流路に連通した透孔あるいは細孔を設けておき、前記透孔あるいは細孔から溶融樹脂が漏出するのを確認するように構成される。
請求項４に記載の発明は、プリンタに内蔵されているインク容器を保持するインク容器固定部材の底壁部が底板と、該底板に接合される補助板とからなり、前記補助板が前記底板に接合されると、前記底板と補助板との間にインク流路が形成される成形品を、固定金型と、該固定金型に対して型締めされると共に第１の位置と第２の位置との間をスライド的に駆動される可動金型とを使用して製造する製造方法であって、前記可動金型が第１の位置にあるとき、前記底板と補助板を、その接合面にインク流路用の凹溝と接合用の循環状の凹溝とを有するように成形する１次成形と、前記底板と補助板がそれぞれの金型に残った状態で前記可動金型を第２の位置へ駆動して接合面を互いに突き合わせて型締めすることにより、前記接合用の循環状の凹溝により構成される連続した閉断面形状の樹脂流路に溶融樹脂を射出して、前記底板と補助板を接合する２次成形とから底壁部にインク流路を有する成形品を得るとき、前記２次成形時に、前記連続した閉断面形状の樹脂流路に可動堰を挿入して前記樹脂流路を一時閉鎖しておき、前記可動堰の一側側の近傍から２次成形用の溶融樹脂を射出し、射出する溶融樹脂が前記可動堰の他側側に達するとその圧力により前記可動堰を退避させ、これにより連続した閉断面形状の樹脂流路を一方向から実質的に完全に充填してインク流路を形成するように構成される。
請求項５に記載の発明は、プリンタに内蔵されているインク容器を保持するインク容器固定部材の底壁部が底板と、該底板に接合される補助板とからなり、前記補助板が前記底板に接合されると、前記底板と補助板との間にインク流路が形成される成形品を、固定金型と、該固定金型に対して型締めされる可動金型とを使用して製造する製造方法であって、前記底板と補助板を、その接合面にインク流路用の凹溝と接合用の循環状の凹溝とを有するように成形し、成形された前記底板と補助板を前記金型にインサートし、接合面を互いに突き合わせて型締めすることにより、前記接合用の循環状の凹溝により構成される連続した閉断面形状の樹脂流路に溶融樹脂を射出して、底壁部にインク流路を有する成形品を得るとき、前記連続した閉断面形状の樹脂流路に可動堰を挿入して前記樹脂流路を一時閉鎖しておき、前記可動堰の一側側の近傍から２次成形用の溶融樹脂を射出し、射出する溶融樹脂が前記可動堰の他側側に達するとその圧力により前記可動堰を退避させ、これにより連続した閉断面形状の樹脂流路を一方向から実質的に完全に充填してインク流路を形成するように構成される。請求項６に記載の発明は、請求項４または５に記載の製造方法において、底板と補助板を、その接合面にインク流路用の複数個の独立した凹溝と、これらの凹溝を取り囲むように接合用の複数個の独立した循環状の凹溝とを有するように成形し、成形された前記底板と補助板を接合面を互いに突き合わせて型締めすることにより、前記接合用の複数個の独立した循環状の凹溝により構成される連続した閉断面形状の複数個の樹脂流路に溶融樹脂を射出して、底壁部に独立した複数個のインク流路を有する成形品を得るとき、前記連続した閉断面形状の複数個の樹脂流路の隣り合った２個の樹脂流路の合流点のそれぞれの近傍に可動堰を挿入して前記樹脂流路の一側側への流れを一時閉鎖しておき、前記可動堰の一つの可動堰の閉鎖した側の近傍から２次成形用の溶融樹脂を射出し、射出する溶融樹脂が次々に流れて最後の可動堰に達すると、該可動堰を合流点から退避させ、退避させることにより溶融樹脂が他の可動堰の他側側に達すると、その圧力によりこれらの可動堰を退避させ、これにより連続した閉断面形状の複数個の樹脂流路を一方向から実質的に完全に充填して複数個のインク流路を形成するように、請求項７に記載の発明は、請求項４〜６のいずれかの項に記載の製造方法において、可動堰あるいは最終の可動堰の近傍に樹脂流路に連通した透孔あるいは細孔を設けておき、前記透孔あるいは細孔から溶融樹脂が漏出するのを確認するように、そして請求項８に記載の発明は、請求項４〜７のいずれかの項に記載の製造方法において、補助板を実質的な透明な合成樹脂により成形し、樹脂流路には有色な合成樹脂を射出、充填するように構成される。
請求項９に記載の発明は、請求項４〜８のいずれかの項に記載の製造方法により得られる、プリンタに内蔵されているインク容器を保持するインク容器固定部材からなる底壁部にインク流路を有する成形品のように構成される。 Thus, in order to achieve the above object, according to the first aspect of the present invention, when the first plate and the second plate having a predetermined area are joined, the first plate and the second plate are joined. A molded product in which a liquid flow path is formed between the body and the body is clamped with respect to the stationary mold and slidably driven between the first position and the second position. The movable mold is manufactured using the movable mold, and when the movable mold is in the first position, the first and second plates are connected to the joint surface for the liquid flow path. The primary molding is performed so as to have a concave groove and a circulating concave groove for joining, and the movable mold is moved to the second position with the first and second plate bodies remaining in the respective molds. To the resin flow path having a continuous closed cross section formed by the circular concave grooves for bonding. When a molded product having a liquid flow path is obtained from secondary molding in which oil is injected to join the first and second plate bodies, the continuous closed cross-section resin flow is obtained during the secondary molding. A movable weir is inserted into the path to temporarily close the resin flow path, a molten resin for secondary molding is injected from the vicinity of one side of the movable weir, and the injected molten resin is in addition to the movable weir. When it reaches the side, the movable weir is retreated by the pressure, and thereby, a continuous closed cross-section resin flow path is substantially completely filled from one direction to form a liquid flow path.
According to a second aspect of the present invention, when the first plate and the second plate having a predetermined area are joined, a liquid channel is formed between the first plate and the second plate. Manufacturing a molded product using a fixed mold and a movable mold clamped to the fixed mold, wherein the first and second plates are joined to each other. The surface is molded so as to have a liquid channel concave groove and a joining circular concave groove, and the molded first and second plate bodies are inserted into the mold, and the joint surfaces are brought into contact with each other. By clamping the mold, the molten resin is injected into a continuous closed cross-section shaped resin flow path constituted by the circulation concave grooves for joining, and when a molded product having a liquid flow path inside is obtained, A movable weir is inserted into a continuous closed cross-section resin flow path to temporarily close the resin flow path, and secondary molding is performed from the vicinity of one side of the movable weir. The molten resin is injected, and when the injected molten resin reaches the other side of the movable weir, the movable weir is retracted by the pressure, and thereby the continuous closed cross-sectional shape resin flow path is substantially from one direction. Completely filled to form a liquid flow path. According to a third aspect of the present invention, in the manufacturing method according to the first or second aspect, a through hole or a pore communicating with the resin flow path is provided in the vicinity of the movable weir, and the through hole or the pore is provided. It is configured to confirm that the molten resin leaks from.
According to a fourth aspect of the present invention, a bottom wall portion of an ink container fixing member that holds an ink container built in a printer includes a bottom plate and an auxiliary plate joined to the bottom plate, and the auxiliary plate is the bottom plate. The molded product in which an ink flow path is formed between the bottom plate and the auxiliary plate is clamped to the fixed mold, the fixed mold, and the first position and the second position. Manufacturing method using a movable mold that is slidably driven between the bottom plate and the auxiliary plate when the movable mold is in the first position. Primary molding is performed so as to have a concave groove for an ink flow path and a circular concave groove for bonding on the surface, and the movable mold is placed with the bottom plate and the auxiliary plate remaining in the respective molds. Circulation for the joining by driving to the second position and bringing the joining surfaces into contact with each other and clamping A molten resin is injected into a continuous closed cross-section shaped resin flow path constituted by concave grooves, and a molded product having an ink flow path on the bottom wall portion is obtained from secondary molding for joining the bottom plate and the auxiliary plate. At the time of the secondary molding, the movable weir is inserted into the continuous closed cross-section resin flow path to temporarily close the resin flow path, and the secondary molding is performed from the vicinity of one side of the movable weir. The molten resin is injected, and when the injected molten resin reaches the other side of the movable weir, the movable weir is retracted by the pressure, and thereby the continuous closed cross-sectional shape resin flow path is substantially from one direction. Completely filled to form the ink flow path.
According to a fifth aspect of the present invention, a bottom wall portion of an ink container fixing member that holds an ink container built in a printer includes a bottom plate and an auxiliary plate joined to the bottom plate, and the auxiliary plate is the bottom plate. A molded product in which an ink flow path is formed between the bottom plate and the auxiliary plate, using a fixed mold and a movable mold that is clamped to the fixed mold. A manufacturing method for manufacturing, wherein the bottom plate and the auxiliary plate are formed so as to have a concave groove for ink flow path and a circular concave groove for bonding on the joint surface, and the molded bottom plate and auxiliary plate are formed. By inserting the plate into the mold, butting the joint surfaces together and clamping the mold, the molten resin is injected into the continuous closed cross-sectional resin flow path constituted by the circulation concave grooves for joining. When obtaining a molded product having an ink flow path on the bottom wall, the continuous closing A movable weir is inserted into the resin flow path having a shape to temporarily close the resin flow path, and a molten resin for secondary molding is injected from the vicinity of one side of the movable weir. When the other side of the movable weir is reached, the movable weir is retracted by the pressure, and thereby the ink flow path is formed by substantially completely filling the continuous closed cross-section resin flow path from one direction. Composed. According to a sixth aspect of the present invention, in the manufacturing method according to the fourth or fifth aspect, the bottom plate and the auxiliary plate are provided, a plurality of independent concave grooves for the ink flow path are provided on the joint surface, and the concave grooves are provided. A plurality of jointing grooves are formed by forming a plurality of independent circular grooves for joining so as to surround, and clamping the molded base plate and auxiliary plate with the joining surfaces abutting each other. A molten resin is injected into a plurality of continuous closed-section shaped resin flow paths constituted by individual independent concave grooves, and a molded product having a plurality of independent ink flow paths on the bottom wall portion When obtaining, a movable weir is inserted in the vicinity of the confluence of two resin flow paths adjacent to each other of the plurality of continuous closed cross-section resin flow paths to one side of the resin flow path. The flow is temporarily closed and one of the movable weirs close to the closed side of the movable weir When the molten resin for secondary molding is injected from the flow and the injected molten resin flows one after another and reaches the last movable weir, the movable weir is retreated from the junction, and the molten resin is retreated to another movable weir. When the other side is reached, these movable weirs are evacuated by the pressure, and thereby a plurality of continuous closed cross-sectional resin flow paths are substantially completely filled from one direction, and a plurality of ink flow paths are filled. According to a seventh aspect of the present invention, in the manufacturing method according to any one of the fourth to sixth aspects, the seepage that communicates with the resin flow path in the vicinity of the movable weir or the final movable weir. Holes or pores are provided so that the molten resin leaks from the through-holes or pores, and the invention according to claim 8 is described in any one of claims 4 to 7. In the manufacturing method, the auxiliary plate is made of a substantially transparent synthetic tree. Molded by, the resin flow path emits colored synthetic resin, configured to fill.
According to a ninth aspect of the present invention, there is provided an ink on a bottom wall portion comprising an ink container fixing member for holding an ink container built in a printer, obtained by the manufacturing method according to any one of the fourth to eighth aspects. It is comprised like the molded article which has a flow path.

以上のように、本発明によると、第１の板体と第２の板体とが接合されると前記第１の板体と第２の板体との間に液体流路が形成される成形品を、あるいはプリンタに内蔵されているインク容器を保持するインク容器固定部材の底壁部が底板と、該底板に接合される補助板とからなり、前記補助板が前記底板に接合されると、前記底板と補助板との間にインク流路が形成される成形品は、射出成形により金型内で成形されるので、合成樹脂特有の経時変化による収縮、ソリ等の変形がなく、液体流路あるいは微細なインク流路を成形できる。また、溶着ムラが生じるようなこともない。さらには、金型内で溶着あるいは接合されるので、工場内の湿度・温度等の外乱の影響を受けることはない。また、在庫管理、一時保管等の管理が不要で安価に成形品を製造できる。さらには、溶着時に液体流路あるいはインク流路の内側への樹脂のハミダシがないので、リーク検査、目詰まり検査等の検査費用が不要で安価に製造できる効果も得られる。
上記のような効果が得られると共に、本発明によると、接合用の循環状の凹溝により構成される連続した閉断面形状の樹脂流路に溶融樹脂を射出、充填するときには、前記樹脂流路に可動堰を挿入して前記樹脂流路を一時閉鎖しておき、前記可動堰の一側側の近傍から２次成形用の溶融樹脂を射出し、射出する溶融樹脂が前記可動堰の他側側に達すると、その圧力により前記可動堰を退避させるので、連続した閉断面形状の樹脂流路を一方向から実質的に完全に充填することができる。すなわち、本発明によると、２次成形用の樹脂流路が長くても、一方から１個の射出ノズルにより充填するので、空気たまり等による成形不良は生じない。したがって、本発明によると、液体漏れあるいはインク漏れのない、内部に液体流路あるいはインク流路を有する成形品を安価に製造することができるという、本発明に特有の効果が得られる。 As described above, according to the present invention, when the first plate body and the second plate body are joined, a liquid flow path is formed between the first plate body and the second plate body. A bottom wall portion of an ink container fixing member that holds a molded product or an ink container built in the printer includes a bottom plate and an auxiliary plate joined to the bottom plate, and the auxiliary plate is joined to the bottom plate. And, since the molded product in which the ink flow path is formed between the bottom plate and the auxiliary plate is molded in the mold by injection molding, there is no shrinkage due to aging characteristic of synthetic resin, deformation such as warpage, A liquid channel or a fine ink channel can be formed. Further, there is no occurrence of welding unevenness. Furthermore, since it is welded or joined in the mold, it is not affected by disturbances such as humidity and temperature in the factory. In addition, the management of inventory management, temporary storage, etc. is unnecessary, and the molded product can be manufactured at low cost. Furthermore, since there is no resin burrs inside the liquid flow path or the ink flow path at the time of welding, there is no need for inspection costs such as leak inspection, clogging inspection, and the like, and an effect that can be manufactured at low cost can be obtained.
In addition to the effects as described above, according to the present invention, when the molten resin is injected and filled into a continuous closed cross-section shaped resin flow path constituted by a circular groove for joining, the resin flow path A movable weir is inserted to temporarily close the resin flow path, a molten resin for secondary molding is injected from the vicinity of one side of the movable weir, and the injected molten resin is on the other side of the movable weir. When reaching the side, the movable weir is retracted by the pressure, so that the continuous closed cross-section resin flow path can be substantially completely filled from one direction. That is, according to the present invention, even if the resin flow path for secondary molding is long, it is filled with one injection nozzle from one side, so that molding defects due to air accumulation and the like do not occur. Therefore, according to the present invention, an effect peculiar to the present invention can be obtained that a molded product having a liquid flow path or an ink flow path inside without causing liquid leakage or ink leakage can be manufactured at low cost.

また、他の発明によると、プリンタに内蔵されているインク容器を保持するインク容器固定部材の底壁部が底板と該底板に接合される補助板とからなり、前記補助板が前記底板に接合されると、前記底板と補助板との間に複数個のインク流路が形成される成形品を成形するとき、前記底板と補助板を、その接合面にインク流路用の凹溝と接合用の循環状の凹溝とを複数個有するように成形し、そして前記底板と補助板を互いに突き合わせて型締めすることにより、前記接合用の循環状の凹溝により構成される連続した閉断面形状の複数個の樹脂流路に、２次成形用の溶融樹脂を射出して、前記底板と補助板を接合するとき、前記連続した閉断面形状の複数個の樹脂流路の隣り合った２個の樹脂流路の合流点のそれぞれの近傍に可動堰を挿入して前記樹脂流路の一側側への流れを一時閉鎖しておき、前記可動堰の一つの可動堰の閉鎖した側の近傍から２次成形用の溶融樹脂を射出し、射出する溶融樹脂が次々に流れて最後の可動堰に達すると、該可動堰を合流点から退避させ、退避させることにより溶融樹脂が他の可動堰の他側側に達すると、その圧力によりこれらの可動堰を退避させ、これにより連続した閉断面形状の複数個の樹脂流路を一方向から実質的に完全に充填して複数個のインク流路を形成するので、１個のゲートから複数個のインク流路を有するインク容器固定部材を射出成形により安価に製造することができる効果がさらに得られる。 According to another aspect of the invention, the bottom wall portion of the ink container fixing member that holds the ink container built in the printer includes the bottom plate and the auxiliary plate joined to the bottom plate, and the auxiliary plate is joined to the bottom plate. Then, when molding a molded product in which a plurality of ink flow paths are formed between the bottom plate and the auxiliary plate, the bottom plate and the auxiliary plate are joined to the groove for ink flow passage on the joining surface. A continuous closed cross section constituted by the circular grooves for joining by forming a plurality of circular grooves for circulation and then clamping the bottom plate and the auxiliary plate against each other When the molten resin for secondary molding is injected into the plurality of resin flow paths in the shape and the bottom plate and the auxiliary plate are joined, the adjacent two of the plurality of resin flow paths having the continuous closed cross-sectional shape are adjacent to each other. Insert a movable weir near each confluence of the individual resin flow paths. The flow to one side of the resin flow path is temporarily closed, and the molten resin for secondary molding is injected from the vicinity of the movable weir on the closed side of the movable weir. If the molten resin reaches the other side of the other movable weir by retracting the movable weir from the junction, the movable weir is retracted by the pressure. By this, a plurality of resin flow paths having a continuous closed cross-sectional shape are substantially completely filled from one direction to form a plurality of ink flow paths, so that a plurality of ink flow paths can be formed from one gate. The effect that the ink container fixing member can be manufactured at low cost by injection molding is further obtained.

さらに他の発明によると、最終の可動堰の近傍に樹脂流路に連通した透孔あるいは細孔を設けておき、前記透孔あるいは細孔から溶融樹脂が漏出するのを確認するようにされているので、あるいは補助板を実質的な透明な合成樹脂により成形し、樹脂流路には有色な合成樹脂を射出、充填するので、前述したような効果に加えて、インク流路の成形状態を目視できる効果がさらに得られる。 According to still another invention, a through hole or a pore communicating with the resin flow path is provided in the vicinity of the final movable weir, and it is confirmed that the molten resin leaks from the through hole or the pore. In addition, the auxiliary plate is molded from a substantially transparent synthetic resin, and colored synthetic resin is injected and filled in the resin flow path. A visual effect is further obtained.

以下、本発明の実施の形態を、インク容器を保持するインク容器保持部材を成形する例について、図１〜３により説明する。図１は、２次成形用の樹脂流路を模式的に示す平面図であるが、この図１に示されているように樹脂流路１は、循環状につながっている。さらに詳しくは、図５の（ハ）、（ニ）に示されているように、１次成形により、底板６１と覆板６２が固定金型とスライド金型とにより、底板６１の方に２次成形用の凹溝６５、６５が、そして覆板６２の方にインク流路６０用の凹溝６３がそれぞれ成形され、そして２次成形のためにスライド金型をスライド的に駆動して底板６１と覆板６２とを整合させ、次いで型締めすることにより、２次成形用の樹脂流路１が構成されている状態が、図１に模式的に示されている。したがって、樹脂流路１に２次成形用の溶融樹脂を射出、充填すると、底板６１と覆板６２とが接合されて、循環状の樹脂流路１の内側にインク流路６０が形成されることになる。 Hereinafter, an embodiment of the present invention will be described with reference to FIGS. 1 to 3 with respect to an example of forming an ink container holding member for holding an ink container. FIG. 1 is a plan view schematically showing a resin flow path for secondary molding. As shown in FIG. 1, the resin flow path 1 is connected in a circulating manner. More specifically, as shown in FIGS. 5C and 5D, the bottom plate 61 and the cover plate 62 are moved toward the bottom plate 61 by a primary mold and a fixed mold and a slide mold. Concave grooves 65 and 65 for the next molding are formed, and a concave groove 63 for the ink flow path 60 is formed toward the cover plate 62, and the bottom plate is driven by sliding the slide mold for the secondary molding. A state in which the resin flow path 1 for secondary molding is configured by aligning 61 and the cover plate 62 and then clamping the mold is schematically shown in FIG. Therefore, when the molten resin for secondary molding is injected and filled into the resin flow path 1, the bottom plate 61 and the cover plate 62 are joined, and the ink flow path 60 is formed inside the circulating resin flow path 1. It will be.

本実施の形態によると、上記のようにして構成される樹脂流路１には、可動堰２が設けられている。可動堰２は、コイルスプリングのような弾性体３により樹脂流路１内に略直角に臨むようにバネ付勢されている棒状のバルブ体４を備えている。このバルブ体４の一方側は、樹脂流路１に対して略直角な阻止面５となっているが、他方側は先端部が狭くなるように略４５度に切り落とされた作用面６となっている。したがって、作用面２に２次成形用の溶融樹脂の圧力が作用すると、バルブ体４には該バルブ体４を樹脂流路１から退避させる方向の力が作用することになる。バルブ体４の先端部に対応した位置には、樹脂流路１内に連通した確認孔あるいは確認用の細孔７が設けられている。このように構成されている可動堰２のバルブ体４の阻止面５の近傍に２次成形用の溶融樹脂が射出されるゲート１０が設けられている。 According to the present embodiment, the movable weir 2 is provided in the resin flow path 1 configured as described above. The movable weir 2 includes a rod-shaped valve body 4 that is spring-biased by an elastic body 3 such as a coil spring so as to face the resin flow path 1 at a substantially right angle. One side of the valve body 4 is a blocking surface 5 that is substantially perpendicular to the resin flow path 1, while the other side is a working surface 6 that is cut off at approximately 45 degrees so that the tip is narrowed. ing. Therefore, when the pressure of the molten resin for secondary molding acts on the working surface 2, a force in a direction for retracting the valve body 4 from the resin flow path 1 acts on the valve body 4. At a position corresponding to the tip of the valve body 4, a confirmation hole communicating with the resin flow path 1 or a confirmation pore 7 is provided. A gate 10 through which molten resin for secondary molding is injected is provided in the vicinity of the blocking surface 5 of the valve body 4 of the movable weir 2 configured as described above.

したがって、ゲート１０から２次成形用の溶融樹脂を射出すると、溶融樹脂はバルブ体４の阻止面５によりバルブ体４の方への流れが阻止され、図１の（イ）において矢印で示されているように時計針の方向に流れる。そして、図１の（ロ）に示されているバルブ体４の作用面６に達する。そうすると、溶融樹脂の圧力が作用面６に作用し、バルブ体４は弾性体３を圧縮して樹脂流路１から退避する。２次成形用の溶融樹脂は、退避したバルブ体４の跡を埋めるように充填される。そうして、確認用の細孔７から余分の溶融樹脂が流れ出る。これにより、樹脂流路１は実質的に完全に充填され、前述したようなインク流路６０が形成される。確認用の細孔７から出る溶融樹脂を確認して、実質的に完全に充填されたことを知ることができる。 Therefore, when molten resin for secondary molding is injected from the gate 10, the molten resin is prevented from flowing toward the valve body 4 by the blocking surface 5 of the valve body 4, and is indicated by an arrow in FIG. It flows in the direction of the clock hand. And it reaches the action surface 6 of the valve body 4 shown in FIG. Then, the pressure of the molten resin acts on the working surface 6, and the valve body 4 compresses the elastic body 3 and retreats from the resin flow path 1. The molten resin for secondary molding is filled so as to fill the trace of the retracted valve body 4. Then, excess molten resin flows out from the confirmation pores 7. Thereby, the resin flow path 1 is substantially completely filled, and the ink flow path 60 as described above is formed. By confirming the molten resin coming out of the confirmation pores 7, it can be known that the resin is substantially completely filled.

上記のようにして、１個のインク流路６０を形成することができるが、３個のインク流路を形成する原理が図２に示されている。図２の（イ）において、２次成形用の、３個の循環状の第１、２および３の樹脂流路１ａ、１ｂ、１ｃが模式的に示されている。したがって、これらの第１〜３の樹脂流路１ａ、１ｂ、１ｃにより、図５の（ハ）、（ニ）により説明したように３個のインク流路６０、６０、…が形成されることになる。図１に示されている構成要素と同じような要素には同じ参照数字にアルフアベットの小文字を添えて重複説明はしないが、第１、２の樹脂流路１ａ、１ｂの合流点近傍には共通の第２の可動堰２ｂが設けられている。同様に、第２、３の樹脂流路１ｂ、１ｃの合流点の近傍には共通の第３の可動堰２ｃが設けられ、そして第３、１の樹脂流路１ｃ、１ａの合流点近傍には共通の第１の可動堰２ａがそれぞれ設けられている。これらの可動堰２ａ〜２ｃは、図１に示されているように構成され、そして第１〜３の可動堰２ａ〜２ｃは、図２に示されているように三角形の頂点に背中合わせ状態に配置されている。さらに詳しくは、これらの可動堰２ａ〜２ｃのバルブ体は、背中合わせ面側が「作用面」、他方側が「阻止面」となるように配置されている。したがって、溶融樹脂は、後述するように第１〜３の樹脂流路１ａ、１ｂ、１ｃを順に流れることになる。なお、第１の可動堰２ａのバルブ体は、油圧あるいは電磁的に強制的に退避可能となっている。 Although one ink flow path 60 can be formed as described above, the principle of forming three ink flow paths is shown in FIG. In FIG. 2A, three circular first, second and third resin flow paths 1a, 1b and 1c for secondary molding are schematically shown. Therefore, these first to third resin flow paths 1a, 1b, and 1c form three ink flow paths 60, 60,... As described with reference to (c) and (d) of FIG. become. Elements similar to those shown in FIG. 1 will not be redundantly described with the same reference numerals appended with lower case letters of the alphabet, but near the confluence of the first and second resin flow paths 1a and 1b. A common second movable weir 2b is provided. Similarly, a common third movable weir 2c is provided in the vicinity of the confluence of the second and third resin flow paths 1b and 1c, and in the vicinity of the confluence of the third and first resin flow paths 1c and 1a. Are provided with a common first movable weir 2a. These movable weirs 2a to 2c are configured as shown in FIG. 1, and the first to third movable weirs 2a to 2c are back-to-back at the apex of the triangle as shown in FIG. Is arranged. More specifically, the valve bodies of these movable weirs 2a to 2c are arranged so that the back-to-back surface side is an “action surface” and the other side is a “blocking surface”. Therefore, the molten resin flows through the first to third resin flow paths 1a, 1b, and 1c in order as will be described later. The valve body of the first movable weir 2a can be forcibly retracted hydraulically or electromagnetically.

今、図２の（イ）に示されているように、阻止面側に設けられている１個のゲート１０ａから２次成形用の溶融樹脂を射出、充填すると、第１の可動堰２ａにより反時計針方向の流れが阻止され、時計針の方向に流れる。この状態が図２の（ロ）に示されている。溶融樹脂は、第２の可動堰２ｂの阻止面に達する。第２の可動堰２ｂを開くことなく、図２の（ハ）に示されているように、第２の樹脂流路１ｂへと流れる。次いで、図２の（ニ）に示されているように、同様にして第３の樹脂流路１ｃへと流れる。ここで、溶融樹脂が第１の可動堰２ａに達すると、これを検知してバルブ体を開く。そうすると、溶融樹脂は第２、３の可動堰２ｂ、２ｃの作用面に達する。溶融樹脂の圧力がバルブ体の作用面に作用し、バルブ体は第１、２の樹脂流路１ａ、１ｂおよび第２、３の樹脂流路１ｂ、１ｃから退避する。これにより、バルブ体が退避した跡にも充填される。このように１個のゲート１０ａから３個の第１〜３の樹脂流路１ａ〜１ｃに実質的に完全に充填された状態が図２の（ヘ）に示されている。 Now, as shown in FIG. 2A, when the molten resin for secondary molding is injected and filled from one gate 10a provided on the blocking surface side, the first movable weir 2a Flow in the counterclockwise direction is blocked and flows in the direction of the clock hand. This state is shown in FIG. The molten resin reaches the blocking surface of the second movable weir 2b. Without opening the second movable weir 2b, it flows to the second resin flow path 1b as shown in FIG. Next, as shown in FIG. 2D, the flow similarly proceeds to the third resin flow path 1c. Here, when the molten resin reaches the first movable weir 2a, this is detected and the valve body is opened. Then, the molten resin reaches the working surfaces of the second and third movable weirs 2b and 2c. The pressure of the molten resin acts on the working surface of the valve body, and the valve body is retracted from the first and second resin flow paths 1a and 1b and the second and third resin flow paths 1b and 1c. Thereby, it fills also with the trace which the valve body evacuated. A state in which the three first to third resin flow paths 1a to 1c are substantially completely filled from one gate 10a in this way is shown in FIG.

第２、３の可動堰２ｂ、２ｃの近傍すなわち図１に示されているようにバルブ体４の近傍に確認用の細孔を設けておき、充填状態を知ることができることは明らかである。また、２次成形用の樹脂流路の数を増やしても、同様に充填して複数個のインク流路を形成できることも明らかである。 It is obvious that the filling state can be known by providing confirmation pores in the vicinity of the second and third movable weirs 2b and 2c, that is, in the vicinity of the valve body 4 as shown in FIG. It is also clear that even if the number of secondary molding resin channels is increased, a plurality of ink channels can be formed by filling in the same manner.

図３により、固定金型と、スライド金型とを使用した、プリンタに内蔵されているインク容器保持部材のインク流路の成形例について説明する。図３の（イ）は、１次成形のためにスライド金型を第１の位置にして型締めして充填した状態で、その（ハ）は２次成形のためにスライド金型を第２の位置へ駆動して型締めした状態の金型をそれぞれ示す断面図であるが、これらの図に示されているように、固定金型２０のパーティングラインＰ側の図において上方には、図５に関して説明した覆板６２を成形するための凹部２１が形成されている。この凹部２１の底部にはゲートが開口し、このゲートは１次成形用の第２のスプール２２、ランナ２３および第１のスプール２４を介して射出ノズル２５に連通している。ランナ２４は第１のスプール２４を越えて下方にも延びている。そして、この延びたランナ２３には１次成形用の第３のスプール２６が連通し、そのゲートはパーティングラインＰ側に開口している。 An example of forming an ink flow path of an ink container holding member built in a printer using a fixed mold and a slide mold will be described with reference to FIG. FIG. 3 (a) shows a state in which the slide mold is clamped and filled in the first position for primary molding, and (c) shows that the slide mold is second for secondary molding. FIG. 3 is a cross-sectional view showing the molds that are driven to the position of the mold and clamped, but as shown in these figures, in the drawings on the parting line P side of the fixed mold 20, A recess 21 for forming the cover plate 62 described with reference to FIG. 5 is formed. A gate is opened at the bottom of the recess 21, and the gate communicates with the injection nozzle 25 via a second spool 22, a runner 23, and a first spool 24 for primary molding. The runner 24 extends downward beyond the first spool 24. The extended runner 23 communicates with the third spool 26 for primary molding, and the gate thereof opens to the parting line P side.

固定金型２０には２次成形用のスプール２７も設けられている。この２次成形用のスプール２７はゲート２８を介して、樹脂流路に開口しているが、ゲート２８は図１に関して説明したように、可動堰２のバルブ体の阻止面に近接して設けられている。このような、１次成形用の第２、３のスプール２２、２６と、２次成形用のスプール２７は、特許第３５１５２４９号明細書（特開平９−７６２８９号公報）、特許第３０４７２１３号明細書（特開平９−１５５９２１号公報）等に記載されているようなスプール切換装置あるいはランナ切換装置により、作用の項で説明するように適宜切り換えられるようになっている。 The fixed mold 20 is also provided with a secondary forming spool 27. The secondary molding spool 27 is opened to the resin flow path through the gate 28. The gate 28 is provided close to the blocking surface of the valve body of the movable weir 2 as described with reference to FIG. It has been. The second and third spools 22 and 26 for primary molding and the spool 27 for secondary molding are disclosed in Japanese Patent No. 3515249 (Japanese Patent Laid-Open No. 9-76289) and Japanese Patent No. 3047213. As described in the section of operation, the spool switching device or the runner switching device as described in Japanese Patent Application Laid-Open No. 9-155921 can be appropriately switched.

固定金型２０のパーティングラインＰ側の下方位置には、コア２９が形成されている。このコア２９は、図３の（ロ）に示されているように環状になっている。したがって、このコア２９で成形される２次成形用の樹脂流路、より正確には凹溝の間に、前述したインク流路６０が成形されることになる。 A core 29 is formed at a lower position of the fixed mold 20 on the parting line P side. The core 29 has an annular shape as shown in FIG. Therefore, the above-described ink flow path 60 is formed between the resin flow path for secondary molding formed by the core 29, more precisely, between the concave grooves.

スライド金型３０は、固定金型２０に対して型締めされると共に、図３には示されていないが、駆動装置により図３の（イ）に示されている第１の位置と、図３の（ハ）に示されている第２の位置とを採るようにスライド的に駆動されるようになっている。このように駆動されるスライド金型３０のパーティングラインＰ側には、固定金型２０の凹部２１に対応して所定高さのコア３１が設けられている。このコア３１によりインク流路６０が成形されることになる。また、固定金型２０の凹部２１に対応して、該凹部２１の深さと同じ高さのコア３２が設けられている。このコア３２により覆板６２に２次成形用の溶融樹脂が流れる流路が成形される。スライド金型３０の下方部分には、インク容器固定部材を成形するための凹部３３が形成されている。この凹部３３は固定金型２０のコア２９に対応している。スライド金型３０には、可動堰２が設けられている。この可動堰２は、図１に示されているように構成されているので、重複説明はしないが、スライド金型３０が第１の位置にあるときは、そのバルブ体の先端部は固定金型２０のコア２９と整合している。したがって、図３の（イ）に示されている第１の位置で型締めすると、バルブ体はコア２９に押されて退避する。 The slide mold 30 is clamped with respect to the fixed mold 20 and is not shown in FIG. 3, but the first position shown in FIG. It is slidably driven so as to adopt the second position shown in 3 (c). On the parting line P side of the slide mold 30 driven in this way, a core 31 having a predetermined height is provided corresponding to the concave portion 21 of the fixed mold 20. The ink flow path 60 is formed by the core 31. Further, a core 32 having the same height as the depth of the recess 21 is provided corresponding to the recess 21 of the fixed mold 20. The core 32 forms a flow path in the cover plate 62 through which the molten resin for secondary molding flows. A concave portion 33 for forming the ink container fixing member is formed in the lower portion of the slide mold 30. The recess 33 corresponds to the core 29 of the fixed mold 20. The slide mold 30 is provided with a movable weir 2. Since the movable weir 2 is configured as shown in FIG. 1, it will not be redundantly described. However, when the slide mold 30 is in the first position, the tip of the valve body is fixed. Aligned with the core 29 of the mold 20. Therefore, when the mold is clamped at the first position shown in FIG. 3A, the valve body is pushed by the core 29 and retracts.

次に、上記金型を使用した成形例について説明する。スライド金型３０を、図３の（イ）に示されている第１の位置にして型締めする。そうすると、固定金型２０の凹部２１とスライド金型３０のコア３１、３２およびパーティングライン面Ｐとにより覆板６２を１次成形するためのキャビテイＣＣが構成される。また、固定金型２０のコア２９とスライド金型３０の凹部３３とによりインク容器固定部材６２を１次成形するためのキャビテイＨＣが構成される。スプールあるいはランナを切り換えて１次成形用の溶融樹脂を射出ノズル２５から射出する。溶融樹脂は、第１のスプール２４、ランナ２３および第２のスプール２２からキャビテイＣＣに射出充填される。これにより、覆板６２がインク流路６０を形成するための凹溝６３と２次成形用の透孔とを有するように成形される。一方、溶融樹脂は第１のスプール２４、ランナ２３および第３のスプール２６からキャビテイＨＣに射出充填され、底板６１を有する本体が成形される。本体の底板６１には、コア２９により２次成形用の溶融樹脂が充填される凹溝６５、６５が成形される。 Next, a molding example using the mold will be described. The slide mold 30 is clamped at the first position shown in FIG. Then, a cavity CC for primary molding of the cover plate 62 is constituted by the concave portion 21 of the fixed mold 20, the cores 31 and 32 of the slide mold 30, and the parting line surface P. Further, the core 29 of the fixed mold 20 and the recess 33 of the slide mold 30 constitute a cavity HC for primarily forming the ink container fixing member 62. The spool or runner is switched to inject molten resin for primary molding from the injection nozzle 25. The molten resin is injected and filled into the cavity CC from the first spool 24, the runner 23, and the second spool 22. Thus, the cover plate 62 is molded so as to have the concave groove 63 for forming the ink flow path 60 and the through hole for secondary molding. On the other hand, the molten resin is injected and filled into the cavity HC from the first spool 24, the runner 23, and the third spool 26, and the main body having the bottom plate 61 is formed. The bottom plate 61 of the main body is formed with concave grooves 65 and 65 filled with molten resin for secondary molding by the core 29.

ある程度の冷却固化を待って、覆板６２は可動金型２０の方に、本体はスライド金型３０の方に残った状態で、スライド金型３０を開く。そうして、スライド金型３０を第２の位置へスライドさせる。この第２の位置では、覆板６２と本体の底板６１は整合する。スライド金型３０を型締めする。型締めすると、底板６１の凹溝６５、６５と、覆板６２とにより閉断面形状の樹脂流路７０、７０が構成される。このようにして型締めされた状態が図３の（ハ）に示されている。スプールあるいはランナを切り換えて２次成形用の溶融樹脂を射出ノズル２５から射出する。２次成形用の溶融樹脂は、第１のスプール２４、ランナ２３、第３のスプール２７およびゲート２８を介して２次成形用の樹脂流路７０に充填される。このとき、樹脂流路７０内には、図１に関して説明したように可動堰２のバルブ体が臨んでいるので、溶融樹脂は図３の（ニ）に示されているように、時計針の回転方向に充填されていく。そして、可動堰２の作用面に達すると、バルブ体を弾性体に抗して押し戻す。これにより、バルブ体の跡も充填される。そして、確認用の細孔７から出る。 Waiting for a certain amount of cooling and solidification, the slide mold 30 is opened with the cover plate 62 remaining on the movable mold 20 and the main body remaining on the slide mold 30. Then, the slide mold 30 is slid to the second position. In this second position, the cover plate 62 and the bottom plate 61 of the main body are aligned. The slide mold 30 is clamped. When the mold is clamped, the resin grooves 70 and 70 having a closed cross section are formed by the concave grooves 65 and 65 of the bottom plate 61 and the cover plate 62. A state in which the mold is clamped in this manner is shown in FIG. The spool or runner is switched to inject molten resin for secondary molding from the injection nozzle 25. The molten resin for secondary molding is filled into the resin channel 70 for secondary molding via the first spool 24, the runner 23, the third spool 27, and the gate 28. At this time, since the valve body of the movable weir 2 faces the resin flow path 70 as described with reference to FIG. 1, the molten resin has a clockwise hand as shown in FIG. Fill in the direction of rotation. Then, when the working surface of the movable weir 2 is reached, the valve body is pushed back against the elastic body. Thereby, the mark of the valve body is also filled. And it comes out from the pore 7 for confirmation.

上記金型の実施の形態では１個のインク流路６０を成形する例について説明されているが、図２に示されているように、複数個のインク流路を有するインク容器固定部材を同様にして成形できることは明らかである。また、インク容器固定部材について説明したが、１次成形した２部材間に同様にして１個あるいは複数個の液体流路を成形できることも明らかである。また、上記実施の形態では、スライド金型が使用されているが、他の金型で成形した本体と覆板を一対の金型にインサートして前述したようにして成形することもできる。このようにインサートして成形しても、射出成形により成形するので、発明の効果の項で説明されているような効果が得られることは明らかである。 In the above embodiment of the mold, an example in which one ink flow path 60 is formed has been described. However, as shown in FIG. 2, an ink container fixing member having a plurality of ink flow paths is similarly used. Obviously, it can be molded. Further, although the ink container fixing member has been described, it is apparent that one or a plurality of liquid flow paths can be formed in the same manner between the two primary molded members. In the above embodiment, a slide mold is used. However, it is also possible to insert a main body and a cover plate molded with another mold into a pair of molds and perform molding as described above. Even if the molding is performed by inserting in this manner, it is apparent that the effects described in the section of the effect of the invention can be obtained because the molding is performed by injection molding.

本発明の基本動作を模式的に示す図で、その（イ）は可動堰が樹脂流路内に臨んだ状態を、その（ロ）は可動堰に２次成形用の溶融樹脂が作用している状態を、そして（ハ）は可動堰が２次成形用の溶融樹脂の作用により退避している状態をそれぞれ示す平面図である。FIG. 2 is a diagram schematically showing the basic operation of the present invention, in which (a) shows a state where the movable weir faces the resin flow path, and (b) shows that the molten resin for secondary molding acts on the movable weir. (C) is a plan view showing the state where the movable weir is retracted by the action of the molten resin for secondary molding. 本発明の第２の基本動作を模式的に示す図で、その（イ）〜（ヘ）は第１〜３の樹脂流路が２次成形用の溶融樹脂により順次充填されている段階を示す平面図である。FIGS. 4A and 4B are diagrams schematically showing a second basic operation of the present invention, wherein FIGS. 1A to 1F show stages in which the first to third resin flow paths are sequentially filled with molten resin for secondary molding. FIGS. It is a top view. 本発明の方法の実施に使用される金型を模式的に示す図で、その（イ）は、１次成形のためにスライド金型を第１の位置にして型締めし充填した状態を示す断面図で、その（ロ）は１次成形時の樹脂流路を示す平面図、その（ハ）はスライド金型を第２の位置へ駆動して型締めした状態で示す断面図、そしてその（ニ）は２次成形用の樹脂流路を示す平面図である。BRIEF DESCRIPTION OF THE DRAWINGS It is a figure which shows typically the metal mold | die used for implementation of the method of this invention, and the (a) shows the state which clamped and filled the slide metal mold | die in the 1st position for the primary molding. (B) is a plan view showing a resin flow path during primary molding, (C) is a cross-sectional view showing a state in which a slide mold is driven to a second position and clamped, and (D) is a top view which shows the resin flow path for secondary shaping | molding. インク容器固定部材を模式的に示す図で、その（イ）は全体を示す斜視図、その（ロ）はその裏面図、その（ハ）は（ロ）において矢視ハーハ方向に見た断面図である。It is a figure which shows an ink container fixing member typically, The (a) is the perspective view which shows the whole, The (b) is the back view, The (c) is sectional drawing seen in the arrow haha direction in (b) It is. インク容器固定部材に覆板を接合する例を示す図で、その（イ）は図４の（ロ）において矢視ハーハ方向に見た図に相当した接合前の断面図、その（ロ）は超音波により接合した断面図、その（ハ）は射出成形により接合する例を示す模式的平面図、その（ニ）は（ハ）において矢視ニーニ方向に見た断面図である。FIG. 5 is a diagram illustrating an example in which a cover plate is joined to an ink container fixing member. FIG. 4A is a cross-sectional view before joining corresponding to the view seen in the direction of the arrow in FIG. Sectional drawing joined by ultrasonic waves, (c) is a schematic plan view showing an example of joining by injection molding, (d) is a sectional view seen in the arrow Nini direction in (c).

Explanation of symbols

１、７０２次成形用の樹脂流路２可動堰
３弾性体４バルブ体
５阻止面６作用面
７確認用の細孔２０固定金型
２１凹部（覆板成形用）２９コア（樹脂流路成形用）
３０スライド金型３１コア（インク流路成形用）
３３凹部（インク容器本体成形用
５０インク容器固定部材６０インク流路
６１底板（インク容器固定部材の底板）
６２覆板（底板に接合される板） DESCRIPTION OF SYMBOLS 1,70 Resin flow path for secondary molding 2 Movable weir 3 Elastic body 4 Valve body 5 Blocking surface 6 Working surface 7 Fine pore for confirmation 20 Fixed mold
21 Recess (for cover plate molding) 29 Core (for resin flow path molding)
30 Slide mold 31 Core (for ink flow path molding)
33 Concave portion (for forming ink container body 50 ink container fixing member 60 ink channel
61 Bottom plate (bottom plate of ink container fixing member)
62 Cover plate (plate joined to bottom plate)

Claims

When a first plate body and a second plate body having a predetermined area are joined, a molded product in which a liquid flow path is formed between the first plate body and the second plate body is formed as a fixed mold. And a manufacturing method that uses a movable mold that is clamped to the fixed mold and is slidably driven between a first position and a second position,
When the movable mold is in the first position, the first and second plate bodies are molded so as to have a concave groove for a liquid flow path and a circular concave groove for bonding on the joint surface. The primary molding and the first and second plates remain in the respective molds, the movable mold is driven to the second position, the joining surfaces are brought into contact with each other, and the molds are clamped. The molten resin is injected into a continuous closed cross-section shaped resin flow path constituted by circular concave grooves for use in the second molding for joining the first and second plate bodies, and a liquid flow path is provided inside. When obtaining a molded product having
At the time of the secondary molding, a movable weir is inserted into the continuous closed cross-section resin flow path to temporarily close the resin flow path, and then melt for secondary molding from the vicinity of one side of the movable weir. Resin is injected, and when the injected molten resin reaches the other side of the movable weir, the movable weir is retracted by the pressure, and thereby a continuous closed cross-sectional shape resin flow path is substantially completely formed from one direction. A method for producing a molded product having a liquid flow path therein, wherein the liquid flow path is formed by filling.

When a first plate body and a second plate body having a predetermined area are joined, a molded product in which a liquid flow path is formed between the first plate body and the second plate body is formed as a fixed mold. And a manufacturing method for manufacturing using a movable mold that is clamped to the fixed mold,
The first and second plate bodies are formed to have a concave groove for a liquid flow path and a circular concave groove for bonding on the joint surface, and the first and second plate bodies are formed as described above. By inserting the mold into the mold, butting the joint surfaces together and clamping the mold, the molten resin is injected into the continuous closed cross-sectional resin flow path constituted by the circulation concave grooves for joining, and the inside When obtaining a molded product having a liquid flow path,
A movable weir is inserted into the continuous closed cross-sectional shape resin flow path to temporarily close the resin flow path, and a molten resin for secondary molding is injected from the vicinity of one side of the movable weir. When the molten resin reaches the other side of the movable weir, the movable weir is retracted by the pressure, thereby filling the continuous closed cross-sectional shape resin channel substantially completely from one direction to the liquid channel A method for producing a molded article having a liquid flow path therein, characterized in that

The manufacturing method according to claim 1 or 2, wherein a through hole or a pore communicating with the resin flow path is provided in the vicinity of the movable dam, and the inside for confirming that the molten resin leaks from the through hole or the pore. A method for producing a molded product having a liquid flow path in the container.

A bottom wall portion of an ink container fixing member that holds an ink container built in a printer is composed of a bottom plate and an auxiliary plate joined to the bottom plate. When the auxiliary plate is joined to the bottom plate, the bottom plate The molded product in which the ink flow path is formed between the auxiliary plate and the fixed mold is clamped with respect to the fixed mold and is slid between the first position and the second position. A manufacturing method for manufacturing using a movable mold that is driven,
When the movable mold is in the first position, the bottom plate and the auxiliary plate are molded so as to have a concave groove for ink flow path and a circular concave groove for bonding on the joint surface. Then, the movable concave mold is driven to the second position with the bottom plate and the auxiliary plate remaining in the respective molds, the joining surfaces are brought into contact with each other, and the mold is clamped. When a molten resin is injected into a continuous closed cross-section shaped resin flow path constituted by grooves to obtain a molded product having an ink flow path in the bottom wall portion from the secondary molding for joining the bottom plate and the auxiliary plate,
At the time of the secondary molding, a movable weir is inserted into the continuous closed cross-section resin flow path to temporarily close the resin flow path, and then melt for secondary molding from the vicinity of one side of the movable weir. Resin is injected, and when the injected molten resin reaches the other side of the movable weir, the movable weir is retracted by the pressure, and thereby a continuous closed cross-sectional shape resin flow path is substantially completely formed from one direction. A method for producing a molded article having an ink flow path in a bottom wall portion, wherein the ink flow path is formed by filling.

A bottom wall portion of an ink container fixing member that holds an ink container built in a printer is composed of a bottom plate and an auxiliary plate joined to the bottom plate. When the auxiliary plate is joined to the bottom plate, the bottom plate A manufacturing method for manufacturing a molded product in which an ink flow path is formed between an auxiliary plate using a fixed mold and a movable mold that is clamped to the fixed mold,
The bottom plate and the auxiliary plate are formed to have a concave groove for ink flow path and a circular concave groove for bonding on the joint surface, and the molded bottom plate and auxiliary plate are inserted into the mold. The joint surfaces are brought into contact with each other and clamped to inject the molten resin into a continuous closed cross-sectional shape resin flow path constituted by the circular grooves for joining, and the ink flow path is formed in the bottom wall portion. When obtaining a molded article having
A movable weir is inserted into the continuous closed cross-sectional shape resin flow path to temporarily close the resin flow path, and a molten resin for secondary molding is injected from the vicinity of one side of the movable weir. When the molten resin to reach the other side of the movable weir, the movable weir is retracted by the pressure, thereby filling the continuous closed cross-sectional shape resin flow path substantially completely from one direction to the ink flow path A method for producing a molded article having an ink flow path in the bottom wall portion.

6. The manufacturing method according to claim 4, wherein the bottom plate and the auxiliary plate have a plurality of independent concave grooves for ink flow passages on the joint surface and a plurality of joint grooves so as to surround the concave grooves. A plurality of independent circular grooves for joining are formed by molding the bottom plate and the auxiliary plate so that the joint surfaces are brought into contact with each other and clamped. When a molten resin is injected into a plurality of continuous closed-section shaped resin flow paths constituted by the following, to obtain a molded product having a plurality of independent ink flow paths on the bottom wall portion,
A movable weir is inserted in the vicinity of the junction of two adjacent resin flow paths of the plurality of resin flow paths having a continuous closed cross-sectional shape to temporarily flow the resin flow path to one side. When the molten resin for secondary molding is injected from the vicinity of the closed side of one movable weir of the movable weir, the molten resin to be injected flows one after another and reaches the last movable weir. When the molten resin reaches the other side of the other movable weir by retracting the weir from the confluence, the movable weir is retracted by the pressure, and thereby a plurality of continuous closed cross-section shaped resins A method of manufacturing a molded article having an ink channel on a bottom wall portion, wherein a plurality of ink channels are formed by substantially completely filling a channel from one direction.

In the manufacturing method according to any one of claims 4 to 6, a through-hole or a pore communicating with the resin flow path is provided in the vicinity of the movable weir or the final movable weir, and from the through-hole or the pore, A method for manufacturing a molded article having an ink flow path in a bottom wall portion for confirming leakage of molten resin.

The manufacturing method according to any one of claims 4 to 7, wherein the auxiliary plate is formed of a substantially transparent synthetic resin, and a colored synthetic resin is injected and filled in the resin flow path. A method for producing a molded article having an ink flow path.

A molded product having an ink flow path in the bottom wall portion, which is obtained by the manufacturing method according to any one of claims 4 to 8 and includes an ink container fixing member that holds an ink container built in a printer.