JP2000271956A - Method for molding hollow molded article and hollow molded article - Google Patents

Abstract

PROBLEM TO BE SOLVED: To integrally mold a hollow molded article which has a sealed product and in which an insert product is embedded automatically with high accuracy by injection molding. SOLUTION: A lower mold device 1 (first female mold 4, second male mold 8) and an upper mold device 2 (first male mold 5, second female mold 7) are arranged in a movable manner and a split body 12 is molded by the first female mold 4 and first male mold 5 of a first mold 3 and a split body 17 is molded by the second female mold 7 and second male mold 8 of a second mold (primary molding). The mold device 1, 2 are moved to oppose the first female mold 4 and the second male mold 7 to each other and a small steel sphere 28 is placed within the split body 12 and the leading end of a metal fitting 27 is held to the mating recessed part 10 of the first female mold 7. Injection pressure is regulated to inject the same resin in the injection groove of the split bodies (secondary molding). The small steel sphere 28 is sealed in a hollow part 25 and a lure substrate (hollow molded article) 26 in which the base end of the metal fitting 27 is embedded is molded.

Description

【発明の詳細な説明】DETAILED DESCRIPTION OF THE INVENTION

【０００１】[0001]

【発明の属する技術分野】この発明は、中空成形品及び
この成形品を射出成形により成形する中空成形品の成形
方法に関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a hollow molded article and a method for molding a hollow molded article by molding the molded article by injection molding.

【０００２】[0002]

【従来の技術】一般に、釣り用のルアー等の中空品を樹
脂成形する場合には、各種成形法で分割体を夫々形成し
て、成形金型から分割体を取り出し、手作業で、分割体
内に重りを置き、両分割体を合わせ、周縁部にインサー
ト品を置きながら合わせ目（周縁部）に樹脂系接着剤を
注入して分割体を張り合わせると共に、インサート品の
基端部を埋め込むという、製造工程が取られていた。2. Description of the Related Art In general, when a hollow article such as a fishing lure is molded with a resin, divided bodies are formed by various molding methods, and the divided bodies are taken out from a molding die, and the divided bodies are manually worked. , Put the weights on each other, fit the two divided bodies together, inject the resin adhesive into the joint (peripheral part) while placing the insert on the periphery, attach the divided bodies, and embed the base end of the insert. , The manufacturing process was taken.

【０００３】また、樹脂の中空品を射出成形で製造する
場合に、いわゆるＤＳＩ成形（Ｄｉｅ Ｓｌｉｄｅ Ｉ
ｎｊｅｃｔｉｏｎ）が行われている。ＤＳＩ成形では、
一般に以下のような（１）（２）の手順で成形が行われ
る。[0003] When a hollow resin product is manufactured by injection molding, a so-called DSI molding (Die Slide I) is used.
njection) is being performed. In DSI molding,
In general, molding is performed according to the following procedures (1) and (2).

【０００４】（１）一次成形 成形予定の中空成形品を２つ割にした分割体を夫々成
形する。 一方の分割体４９を成形する第一雌型４４と第一雄型
４５とらなる第一金型４３と、第一金型４３に近接し
て、他方の分割体４９ａを成形する第二雌型４７と第二
雄型４８とらなる第二金型４６とが設けられている。第
一雌型４４と第二雄型４８とを固定した水平移動金型装
置４１と、第一雄型４５と第二雌型とを固定した昇降金
型装置４２と、を配置する。 第一金型４３、第二金型４６を、夫々と合わせて、溶
解樹脂を注入して一次成形をして２つの分割体４９、４
９ａを夫々成形する（図８（ａ））。 水平移動金型装置４１を移動させて、第一金型４３、
第二金型４６を夫々開く。(1) Primary molding Each of the hollow molded articles to be molded is divided into two and each of the divided bodies is molded. A first female mold 43 forming a first female mold 44 and a first male mold 45 for forming one split body 49; and a second female mold for forming the other split body 49a in close proximity to the first mold 43. 47 and a second mold 46 serving as a second male mold 48 are provided. A horizontally moving mold device 41 to which the first female mold 44 and the second male mold 48 are fixed, and an elevating mold device 42 to which the first male mold 45 and the second female mold are fixed are arranged. The first mold 43 and the second mold 46 are respectively combined with each other, injected with a melted resin and subjected to primary molding to form two divided bodies 49 and 4.
9a are each molded (FIG. 8A). By moving the horizontal moving mold device 41, the first mold 43,
The second molds 46 are respectively opened.

【０００５】（２）二次成形 昇降金型装置４２を上昇させて、第一雌型４４と第二
雌型４７とを対向させて、一次成形した両分割体４９、
４９ａを対向させる。 水平移動金型装置４１を移動して、両雌型４４、４７
を閉じて、両分割体４９、４９ａを互いに突き合わせる
（図８（ｂ））。突き合わせ面内又はその周縁に、はち
まき状に溶解樹脂を注入して両分割体４９、４９ａを互
いに溶着成形する。 水平移動金型装置４１を移動して、両雌型４４、４７
を開くと、中空品５０が成形できる（図８（ｃ））。[0005] (2) Secondary molding The raising and lowering mold device 42 is raised, and the first female mold 44 and the second female mold 47 are opposed to each other.
49a are opposed to each other. By moving the horizontally moving mold device 41, both female molds 44 and 47 are moved.
Is closed, and the two divided bodies 49 and 49a are abutted against each other (FIG. 8B). A molten resin is injected into the butting surface or in the periphery thereof in the form of a sprinkle to weld and form the two divided bodies 49 and 49a together. By moving the horizontally moving mold device 41, both female molds 44 and 47 are moved.
Is opened, a hollow article 50 can be formed (FIG. 8C).

【０００６】[0006]

【発明が解決しようとする課題】前記従来のＤＳＩ成形
では、二次成形において、注入する溶解樹脂の流入圧の
調節が良好になされないと、中空成形品の中空部内や周
縁部の表面側に溶解樹脂が溢れる問題点があった。とり
わけ小型製品の場合に生じていた。In the conventional DSI molding, if the inflow pressure of the melted resin to be injected is not properly adjusted in the secondary molding, the DSI molding may not be formed in the hollow portion of the hollow molded product or on the surface side of the peripheral portion. There was a problem that the molten resin overflowed. This is especially true for small products.

【０００７】また、これを防止するためには、一次成形
において、分割体４９、４９ａの内面側に互いに重なる
ように当接する係止凸条５１、５１ａが形成されるよう
に、金型４３、４６を構成することもできるが（図
７）、金型加工が煩雑となると共に、成形品の肉厚（Ｄ
₀ 、図７）が厚くなる問題点があった。In order to prevent this, in the primary molding, the molds 43, 51a are formed so that the locking projections 51, 51a that abut on the inner surfaces of the divided bodies 49, 49a so as to overlap each other are formed. 46 can be configured (FIG. 7), but the mold processing becomes complicated and the thickness (D
₀ , FIG. 7).

【０００８】また、ＤＳＩ成形では、インサート品の埋
め込みや重りなどの封入品を中空品内に封入することは
行われていなかった。[0008] In the DSI molding, it has not been practiced to embed an insert product or enclose an enclosed product such as a weight in a hollow product.

【０００９】[0009]

【課題を解決するための手段】然るにこの発明では、一
次成形後に金型にインサート品を保持し、あるいは一方
の分割体内に封入品を載置した後に、二次成形を行った
ので、あるいはランナー内で溶解樹脂圧を調節したの
で、前記問題点を解決した。According to the present invention, however, the secondary molding is performed after the insert is held in the mold after the primary molding, or after the encapsulated product is placed in one of the divided bodies. The above problem was solved because the pressure of the melted resin was adjusted within.

【００１０】即ちこの発明は、成形予定の中空成形品を
２つ割にした一方の分割体を夫々成形する第一雄型と第
一雌型とからなる第一金型が設けられ、該第一金型に近
接して他方の分割体を夫々成形する第二雄型と第二雌型
とらなる第二金型が設けられ、前記第一金型と第二金型
とに溶解樹脂を注入して一次成形をし、続いて第一金
型、第二金型の一方又は両方を移動して、前記両分割体
が残留する前記両雌型を対向させ、次に両雌型を閉じて
両分割体を互いに突き合わせて、次に、突き合わせ面又
はその周縁に、溶解樹脂を注入して両分割体を互いに溶
着成形する二次成形をして中空成形品を成形する中空成
形方法において、一次成形で、両分割体の内面側に互い
に当接する合わせ凸条を形成し、続いて、分割体の内部
に封入品又は周縁部にインサート品を配置し、続いて、
一方の分割体の合わせ凸条を他方の分割体の合わせ凸条
とを対向当接させ、次に両分割体の当接面間の外周間隙
内に、圧力を調節して溶解樹脂を注入して両分割体を互
いに溶着して、中空部内に封入品が封入され、又はイン
サート品を埋め込んだ中空樹脂を成形することを特徴と
した中空成形品の成形方法である。That is, according to the present invention, there is provided a first mold comprising a first male mold and a first female mold for respectively molding one of the divided halves of a hollow molded product to be molded. A second mold that is a second male mold and a second female mold for molding the other divided body in proximity to one mold is provided, and a molten resin is injected into the first mold and the second mold. And then primary molding, then the first mold, one or both of the second mold is moved, the two female molds where the two divided bodies remain oppose each other, and then both female molds are closed In a hollow molding method of forming a hollow molded product by abutting the two divided bodies with each other and then performing a secondary molding in which a molten resin is injected into the butted surface or the periphery thereof and the two divided bodies are welded and molded with each other. Forming ridges that abut against each other are formed on the inner surface side of both divided bodies by molding, and subsequently, a sealed product or a peripheral portion is formed inside the divided bodies. Place the insert article, followed by,
The mating ridge of one of the divided bodies is brought into contact with the mating ridge of the other of the divided bodies in opposition, and then the molten resin is injected into the outer circumferential gap between the contact surfaces of the two divided bodies by adjusting the pressure. A method of molding a hollow molded article, characterized in that the two divided bodies are welded to each other to mold a hollow resin in which an encapsulated article is sealed in a hollow portion or an insert article is embedded.

【００１１】また、ここで、二次成形において、金型に
連通するランナーに注入圧調整手段を施して、金型内へ
の溶解樹脂の注入の停止を含めて、注入圧を調節するこ
とを特徴とした中空成形品の成形方法である。また、こ
こで、分割体のインサート品の設置位置に対応させて、
雌型の当接面にインサート品の保持手段を設けたことを
特徴とする中空成形品の成形方法である。Here, in the secondary molding, the injection pressure adjusting means is applied to the runner communicating with the mold to adjust the injection pressure including stopping the injection of the molten resin into the mold. This is a method for forming a hollow molded product that is a feature. Also, here, corresponding to the installation position of the insert product of the divided body,
A method for molding a hollow molded product, characterized in that a holding means for an insert product is provided on a contact surface of a female mold.

【００１２】また、この発明は、同一樹脂により一体成
形された中空部を有する成形品であって、該中空部に移
動可能に封入物が封入されたことを特徴とする中空成形
品である。また、ここで、一次成形により、成形予定の
中空成形品を２つ割にした形状の分割体を夫々成形し、
続いて、前記両分割体内に封入物を封入して両分割体を
合わせると共に、該合わせ目にインサート品の基端部を
配置して、該合わせ目に同一樹脂により二次成形して、
前記インサート品の先端部が突出すると共に中空部に移
動可能に封入物が封入された一体成形物としたことを特
徴とする中空成形品である。更に、ここで、樹脂は生分
解性樹脂とし、成形品を釣り用のルアーとした中空成形
品である。Further, the present invention is a molded article having a hollow portion integrally formed of the same resin, wherein an enclosure is movably sealed in the hollow portion. Also, here, by the primary molding, each of the divided bodies having a shape obtained by dividing the hollow molded article to be molded into two, is formed,
Subsequently, while enclosing the enclosure in the two divided bodies and combining the two divided bodies, the base end portion of the insert product is arranged at the joint, and the same resin is secondarily molded at the joint,
A hollow molded product characterized in that the insert product has an integrally molded product in which a tip portion protrudes and is movably enclosed in a hollow portion. Further, here, the resin is a biodegradable resin, and the molded product is a hollow molded product in which a lure for fishing is used.

【００１３】前記におけるインサート品の保持手段と
は、雌型の突き合わせ面にインサート品を嵌合する嵌合
凹部を形成し、あるいは雌型のインサート保持位置に磁
気を帯びさせること等を指す。The means for holding the insert in the above means forming a fitting recess for fitting the insert on the female mating surface or magnetizing the female insert holding position.

【００１４】また、前記における注入圧調節手段は、例
えばライナー内壁に出没する調節駒を設けた注入圧調節
具から構成する。Further, the injection pressure adjusting means in the above is constituted, for example, by an injection pressure adjusting tool provided with an adjusting piece which protrudes and retracts on the inner wall of the liner.

【００１５】また、前記における生分解性樹脂とは、例
えば、合成高分子型、天然−合成高分子複合型など、従
来使用されてきた材料を使用する。Further, as the biodegradable resin in the above, for example, a conventionally used material such as a synthetic polymer type or a natural-synthetic polymer composite type is used.

【００１６】[0016]

【発明の実施の形態】水平移動可能の下金型装置１（第
一雌型４、第二雄型８）と、昇降可能な上金型装置２
（第一雄型５、第二雌型７）とが対向して配置されてい
る。第一雌型４と第一雄型５とで、第一金型３を構成
し、第二雌型７と第二雄型８とで第二金型６を構成する
（図２（ａ））。第一雌型４及び第二雌型７の当接面に
は、二次成形用のインサート保持用の嵌合凹部１０、１
０を夫々形成してある（図３（ａ））。溶解樹脂の注入
量を微調節する為に、ランナー２３に内壁から出没でき
る調節駒３２を取り付けてある。BEST MODE FOR CARRYING OUT THE INVENTION A lower mold apparatus 1 (first female mold 4, second male mold 8) that can be moved horizontally, and an upper mold apparatus 2 that can move up and down.
(The first male mold 5 and the second female mold 7) are arranged facing each other. The first female mold 4 and the first male mold 5 constitute a first mold 3, and the second female mold 7 and the second male mold 8 constitute a second mold 6 (FIG. 2A). ). The abutment surfaces of the first female mold 4 and the second female mold 7 have fitting recesses 10, 1, 2 for holding an insert for secondary molding.
0 are respectively formed (FIG. 3A). In order to finely adjust the injection amount of the melted resin, an adjustment piece 32 that can come and go from the inner wall is attached to the runner 23.

【００１７】第一雌型４を第一雄型５と、第二雌型７と
第二雄型８とで、分割体１２、１７を夫々成形し（一次
成形）（図２（ｂ）、図３（ａ））。上金型装置２を矢
示３５方向に上昇させて、雄型５、８と雌型４、７を分
離させ、次に下金型装置１を矢示３６方向に移動させ
て、第一雌型４と第二雌型７とを対向させる（図２
（ｄ））。The first female mold 4 is formed by the first male mold 5, the second female mold 7 and the second male mold 8, and the divided bodies 12 and 17 are respectively formed (primary molding) (FIG. 2B). FIG. 3 (a). The upper mold device 2 is raised in the direction of arrow 35 to separate the male dies 5 and 8 from the female dies 4 and 7, and then the lower mold device 1 is moved in the direction of arrow 36 to The mold 4 is opposed to the second female mold 7 (FIG. 2).
(D)).

【００１８】第一雌型４の分割体１２内に小鋼球２８を
載置し、金具２７、２７の先端部を第一雌型７の金具保
持用の嵌合凹部１０に夫々嵌合する。上金型装置２を下
降して、第一第二雌型４、７を対応させ、分割体１２、
１７を合わせる。分割体１２、１７は合わせ目に沿って
注入溝２１が形成される（図３（ｂ）、図２（ｅ））。A small steel ball 28 is placed in the divided body 12 of the first female mold 4, and the tips of the metal fittings 27, 27 are respectively fitted into the fitting recesses 10 for holding the metal fittings of the first female mold 7. . The upper mold device 2 is lowered to make the first and second female molds 4 and 7 correspond to each other.
Adjust 17 In the divided bodies 12 and 17, an injection groove 21 is formed along the joint (FIGS. 3B and 2E).

【００１９】調節駒３２で注入圧を調節して、一次成形
と同一の樹脂からなる溶解樹脂を注入すれば、両分割体
１２、１７が互いに接着されると共に、金具２７の基端
部を注入溝２１の樹脂内に埋設され、小鋼球２８が封入
されたルアー基体２６を形成する（二次成形）。金型か
ら取り出したルアー基体２６の表面に模様を施し、金具
２７、２７に釣り針２９、２９を取付けすれば、ルアー
３０ができる（図１（ｄ））。When the injection pressure is adjusted by the adjusting piece 32 and the molten resin made of the same resin as that of the primary molding is injected, the two divided bodies 12 and 17 are adhered to each other and the base end of the metal fitting 27 is injected. A luer base 26 embedded in the resin of the groove 21 and sealed with small steel balls 28 is formed (secondary molding). If a pattern is formed on the surface of the luer base 26 taken out of the mold and the fishing hooks 29, 29 are attached to the metal fittings 27, 27, the lure 30 is completed (FIG. 1D).

【００２０】[0020]

【実施例１】図１乃至図６に基づきこの発明の成形方法
を釣り用ルアーに適応した実施例を説明する。Embodiment 1 An embodiment in which the molding method of the present invention is applied to a fishing lure will be described with reference to FIGS.

【００２１】下金型装置１と上金型装置２とが対向して
配置され、前記下金型装置１は水平方向に移動可能であ
り、前記上金型装置２は昇降可能（垂直方向に移動可
能）に設置されている。下金型装置１の一側に、成形す
べき分割体に対応する第一雌型４が、他側には成形すべ
き分割体に対応した第二雄型８が夫々形成されている。
上金型装置２の一側には前記第一雌型４に対応する第一
雄型５が形成され、他側には前記第二雄型８に対応した
第二雌型７が形成されている。第一雌型４と第一雄型５
とで、第一金型３を構成し、第二雌型７と第二雄型８と
で第二金型６を構成する（図２（ａ））。前記第一第二
金型３、６は夫々上下方向（縦方向）に開閉する縦型成
形機となっている。A lower mold apparatus 1 and an upper mold apparatus 2 are arranged facing each other, the lower mold apparatus 1 is movable in a horizontal direction, and the upper mold apparatus 2 is movable up and down (in a vertical direction). (Movable). On one side of the lower mold apparatus 1, a first female mold 4 corresponding to the divided body to be molded is formed, and on the other side, a second male mold 8 corresponding to the divided body to be molded is formed.
A first male mold 5 corresponding to the first female mold 4 is formed on one side of the upper mold apparatus 2, and a second female mold 7 corresponding to the second male mold 8 is formed on the other side. I have. First female type 4 and first male type 5
Thus, the first mold 3 is constituted, and the second female mold 7 and the second male mold 8 constitute the second mold 6 (FIG. 2A). The first and second dies 3 and 6 are vertical molding machines that open and close in the vertical direction (vertical direction).

【００２２】前記第一雌型４及び第二雌型７の当接面に
は、二次成形用のインサート保持用の嵌合凹部１０、１
０を夫々形成してある（図３（ａ））。また、図中２
２、２３は、溶解樹脂を射出成形機から金型内に送るラ
ンナーで、２２は一次成形用、２３は二次成形用である
（図２（ａ））。ランナー２３には枝管２３ａ、２３ａ
を介して金型内への吐出側に注入口２４が形成されてい
る（図４）。Abutment surfaces of the first female mold 4 and the second female mold 7 have fitting recesses 10, 1, 2 for holding inserts for secondary molding.
0 are respectively formed (FIG. 3A). In the figure, 2
Reference numerals 2 and 23 denote runners for feeding the molten resin from the injection molding machine into the mold. Reference numeral 22 denotes a primary molding and reference numeral 23 denotes a secondary molding (FIG. 2A). The runner 23 has branch pipes 23a, 23a.
An injection port 24 is formed on the discharge side into the mold through the hole (FIG. 4).

【００２３】また、注入量を微調節する為に、ランナー
２３の注入口２４側の枝管２３ａの内壁３４に凹入部３
１を形成され、該凹入部３１の底に螺穴３１ａを形成す
る。前記凹入部内に、内壁３４から出没できる調節駒３
２を嵌挿する。前記調節駒３２の基端側には螺杆２が突
設され、前記螺穴３１ａに螺合されている。前記調節駒
３２の先端側には、回動用の六角（又は四角）の凹部３
２ｂが形成されている（図５（ｂ））。In order to finely adjust the injection amount, a concave portion 3 is formed in the inner wall 34 of the branch pipe 23a on the injection port 24 side of the runner 23.
1 is formed, and a screw hole 31 a is formed at the bottom of the recess 31. An adjusting piece 3 that can be protruded and retracted from the inner wall 34 in the recess.
2 is inserted. A screw rod 2 is protruded from the base end side of the adjusting piece 32 and is screwed into the screw hole 31a. A hexagonal (or square) concave portion 3 for rotation is provided at the tip end side of the adjusting piece 32.
2b is formed (FIG. 5B).

【００２４】また、第一雌型４、第一雄型５では、中空
部の中仕切１６が形成できるような形状となっている。The first female mold 4 and the first male mold 5 have such a shape that a partition 16 in the hollow portion can be formed.

【００２５】次に、上記金型を使用した成形方法につい
て説明する。Next, a molding method using the above mold will be described.

【００２６】（１） 上金型装置２を下降して、下金型
装置１に近づけ、第一雌型４を第一雄型５と、第二雌型
７と第二雄型８とを夫々合わせて、両金型３、４内に夫
々溶解樹脂を注入して、第一金型３で分割体１２を、第
二金型６で分割体１７を夫々成形する（一次成形）（図
２（ｂ）、図３（ａ））。(1) The upper mold device 2 is lowered to approach the lower mold device 1, and the first female mold 4 is divided into the first male mold 5, the second female mold 7 and the second male mold 8, The molten resin is injected into the two dies 3 and 4 respectively, and the divided body 12 is formed by the first mold 3 and the divided body 17 is formed by the second mold 6 (primary molding) (FIG. 2 (b), FIG. 3 (a)).

【００２７】前記分割体１２は、表面１２ａ側の外周縁
に沿った注入凹条１４が形成され、内面１２ｂ側（中空
部側）に合わせ凸条１３が形成され、また内面１２ｂに
中仕切１６が立設されている。インサート取付位置の注
入凹条１５は深く形成されている。The divided body 12 has an injection recess 14 formed along the outer peripheral edge on the surface 12a side, a projection 13 formed on the inner surface 12b side (hollow portion side), and a middle partition 16 formed on the inner surface 12b. Is erected. The injection recess 15 at the insert mounting position is formed deep.

【００２８】また、前記分割体１７は、表面１７ａ側の
外周縁に沿った注入凹条１９が形成、され、内面１７ｂ
側（中空部側）に合わせ凸条１８が形成されている。同
様にインサート取付位置の注入凹条２０は深く形成され
ている。The divided body 17 has an injection recess 19 formed along the outer peripheral edge on the surface 17a side, and the inner surface 17b is formed.
A ridge 18 is formed on the side (hollow portion side). Similarly, the injection recess 20 at the insert mounting position is formed deep.

【００２９】（２） 上金型装置２を矢示３５方向に上
昇させて、雄型５、８と雌型４、７を分離させると共
に、不要なバリなどを削り（図２（ｃ））、下金型装置
１を矢示３６方向に移動させて、第一雌型４と第二雌型
７とを対向させる（図２（ｄ））。(2) The upper mold unit 2 is raised in the direction of arrow 35 to separate the male dies 5 and 8 from the female dies 4 and 7 and to cut off unnecessary burrs and the like (FIG. 2C). Then, the lower mold apparatus 1 is moved in the direction indicated by the arrow 36 so that the first female mold 4 and the second female mold 7 face each other (FIG. 2D).

【００３０】（３） 第一雌型４の分割体１２内に小鋼
球（重り）２８を載置し、注入凹条１５内に金具２７、
２７の基端部を臨ませ、金具２７、２７の先端部を第一
雌型７の金具保持用の嵌合凹部１０に夫々嵌合する。(3) A small steel ball (weight) 28 is placed in the divided body 12 of the first female mold 4, and a metal fitting 27 is placed in the injection groove 15.
With the base end of 27 facing, the distal ends of the fittings 27 and 27 are fitted into fitting recesses 10 for holding the fittings of the first female mold 7, respectively.

【００３１】（４） 上金型装置２を下降して、第一第
二雌型４、７を対応させ、分割体１２、１７の合わせ凸
条１３、１８を当接させる。分割体１２、１７は、合わ
せ凸条１３の先端１３ａと合わせ凸条１８の先端１８ａ
とが互いに当接し（図６）、両注入凹条１４、１９、注
入凹条１５、２０が互いに対向して、注入溝（外周間
隙）２１を構成する（図３（ｂ）、図２（ｅ））。(4) The upper mold apparatus 2 is lowered to make the first and second female dies 4 and 7 correspond to each other, and to bring the mating ridges 13 and 18 of the divided bodies 12 and 17 into contact. The divided bodies 12 and 17 are composed of a leading end 13a of the fitting ridge 13 and a leading end 18a of
Abut each other (FIG. 6), and the two injection grooves 14, 19 and the injection grooves 15, 20 face each other to form an injection groove (outer peripheral gap) 21 (FIG. 3B, FIG. e)).

【００３２】（５） 注入圧を調節して（一般に一次成
形より圧力を小さくして）、第一第二雌型４、７内の注
入溝２１に、一次成形と同一の樹脂からなる溶解樹脂を
注入する。溶解樹脂は注入溝２１内に充填され、両分割
体１２、１７は互いに接着され、金具２７の基端部は注
入溝２１の樹脂内に埋設され、中空部２５内に小鋼球２
８が封入されたルアー基体２６を形成する（二次成
形）。(5) The injection pressure is adjusted (generally, the pressure is smaller than that of the primary molding), and the molten resin made of the same resin as that of the primary molding is filled in the injection groove 21 in the first and second female molds 4 and 7. Inject. The molten resin is filled in the injection groove 21, the two divided bodies 12 and 17 are adhered to each other, the base end of the metal fitting 27 is embedded in the resin of the injection groove 21, and the small steel ball 2 is inserted in the hollow part 25.
8 is formed to form a luer substrate 26 (secondary molding).

【００３３】この際、注入溝２１に臨むランナー２３か
らの注入口２４、２４は、６ヶ所設けて、１つの注入口
２４に圧力が集中せず、かつ注入溝２１の全体に溶解樹
脂が充填されるようになっている（図１（ｂ）、図
４）。At this time, the injection ports 24, 24 from the runner 23 facing the injection groove 21 are provided at six places so that the pressure is not concentrated on one injection port 24 and the entire injection groove 21 is filled with the molten resin. (FIGS. 1B and 4).

【００３４】注入圧を削減する際には、調節駒３２を回
動して内壁３４から突出させて、枝管２３ａ内の溶解樹
脂の流入量を削減すれば、注入口２４、２４から注入溝
２１内に放出される溶解樹脂の量と圧力を調節できる
（図５（ａ））。When the injection pressure is reduced, the adjusting piece 32 is rotated to protrude from the inner wall 34 to reduce the inflow of the molten resin in the branch pipe 23a. The amount and pressure of the dissolved resin released into the inside 21 can be adjusted (FIG. 5A).

【００３５】また、調節駒３２を更に突出させて他側の
内壁に密着させれば、枝管２３ａが封鎖され、当該注入
口２４からの溶解樹脂の放出を停止することもできる
（図５（ａ）鎖線図示３２）。Further, if the adjusting piece 32 is further protruded and brought into close contact with the inner wall on the other side, the branch pipe 23a is closed, and the discharge of the molten resin from the injection port 24 can be stopped (FIG. 5 ( a) Chain line illustration 32).

【００３６】（６） 上金型装置２を矢示３５方向に上
昇させて、連結された分割体１２、１７を取り出し（図
１（ｃ）、図２（ｆ））、不要なバリなどを削ればルア
ー基体２６を形成する。ルアー基体２６は、従来のよう
に分割体を接着により製造する場合には、接着面に沿っ
て周回する筋が形成されるが、この発明のルアー基体２
６では、二次成形を一次成形と同一樹脂で成形している
ので、筋は、注入溝２１の縁に沿って極めて細かい微小
筋３７、３７が二条形成される（図３（ｃ））。(6) The upper mold device 2 is raised in the direction of arrow 35 to take out the connected divided bodies 12 and 17 (FIGS. 1 (c) and 2 (f)) and remove unnecessary burrs and the like. The shaving forms the lure base 26. In the case where the divided body is manufactured by bonding as in the related art, the luer base 26 has a streak circling along the bonding surface.
In the case of No. 6, since the secondary molding is made of the same resin as the primary molding, extremely fine micro-streaks 37 are formed along the edge of the injection groove 21 (FIG. 3C).

【００３７】また、ルアー基体２６は、分割体１３、１
８の合わせ凸条１３、１８に重ね代が不要であるので、
肉厚Ｄは従来に比して薄く形成できる（図６）。The luer base 26 is made of the divided bodies 13 and 1
Since no overlapping margin is required for the matching ridges 13 and 18 of 8,
The thickness D can be formed thinner than before (FIG. 6).

【００３８】続いて、ルアー基体２６の表面に模様を施
し、金具２７、２７に釣り針２９、２９を取付けすれ
ば、ルアー３０を構成する（図１（ｄ））。Subsequently, a pattern is formed on the surface of the lure base 26, and the fishing hooks 29, 29 are attached to the metal fittings 27, 27, thereby forming the lure 30 (FIG. 1 (d)).

【００３９】また、前記実施例において、ランナー２３
内の調節駒３２は凹部３２ｂで回動させたが、螺穴３１
ａを貫通して、調節駒３２の螺杆３１ａを金型から外方
へ突出させて、先端に六角（又は四角）の頭部３２ｃを
有するボルト状として、該頭部３２ｃを回動させること
もできる。この場合には凹部３２ｂは不要である（図５
（ｂ））。In the above embodiment, the runner 23
The inner adjustment piece 32 is rotated by the concave portion 32b,
a, the screw 31a of the adjustment piece 32 may be projected outward from the mold to form a bolt having a hexagonal (or square) head 32c at the tip, and the head 32c may be rotated. it can. In this case, the concave portion 32b is unnecessary (see FIG. 5).
(B)).

【００４０】また、前記実施例における注入口２４の数
を５としたが、注入口２４の数は、注入溝２１の厚さ
（Ｔ）（図６）、注入溝２１の全周長さ（Ｌ）により適
宜選択して設ける。Although the number of the injection ports 24 in the above embodiment is set to 5, the number of the injection ports 24 depends on the thickness (T) of the injection groove 21 (FIG. 6) and the total circumferential length of the injection groove 21 (FIG. 6). L) to be appropriately selected and provided.

【００４１】また、前記実施例において、第一第二雌型
４、７に嵌合凹部１０、１０を設けて、該部に金具２７
を嵌合して保持したが、嵌合凹部１０に代えて、あるい
は嵌合凹部１０に加えて、該部に磁気を付与して（磁石
を埋め込み）金具２７を第一第二雌型４、７に保持する
こともできる（図示していない）。In the above embodiment, the fitting recesses 10 and 10 are provided in the first and second female dies 4 and 7 and the fittings 27 are provided in the fitting recesses 10 and 10.
Is fitted and held, but instead of or in addition to the fitting recess 10, magnetism is applied to the portion (the magnet is embedded) to attach the metal fitting 27 to the first second female mold 4. 7 (not shown).

【００４２】また、前記実施例において、前記第一第二
金型３、６は夫々上下方向に開閉する縦型成形機とする
ことが望ましいが、左右方向（横方向）に開く横型成形
機とすることもできる。この場合には、二次成形前に小
鋼球２８を保持するため、必要ならば、小鋼球２８の一
部に接着剤を付け、分割体１２、１７のいずれか一方の
中空部側１２ｂ、１７ｂに仮止めすることもできる（図
示していない）。In the above embodiment, the first and second molds 3 and 6 are preferably vertical molding machines that can be opened and closed in the vertical direction, respectively. You can also. In this case, to hold the small steel ball 28 before the secondary forming, if necessary, an adhesive is applied to a part of the small steel ball 28, and the hollow portion side 12b of one of the divided bodies 12, 17 is provided. , 17b (not shown).

【００４３】また、前記実施例において、成形に使用す
る樹脂材は、通常の射出成形に使用できる樹脂であれ
ば、全ての樹脂材について適用できるが、生分解性の樹
脂を使用することもできる。生分解性の樹脂を使用すれ
ば、釣り中にルアーが紛失した場合でも、自然分解され
るので周囲の環境に与える影響が少ない。この場合、生
分解樹脂として、例えば、合成高分子型（ポリエステル
−ナイロン共重合体等）、天然−合成高分子複合型（ア
ミロース−ポリエステル共重合体等）が考えられる。In the above embodiment, the resin material used for molding can be applied to any resin material as long as it can be used for ordinary injection molding, but a biodegradable resin can also be used. . If a biodegradable resin is used, even if the lure is lost during fishing, the lure is naturally degraded, so that the influence on the surrounding environment is small. In this case, as the biodegradable resin, for example, a synthetic polymer type (polyester-nylon copolymer or the like) or a natural-synthetic polymer composite type (amylose-polyester copolymer or the like) can be considered.

【００４４】また、前記実施例において、ルアーの成形
について説明したが、他の中空品のＤＳＩ成形について
も適用できる。この場合、封入品やインサート品を有す
る中空品（とりわけ封入品を有する中空品）について適
用すれば顕著な効果が期待できる。Further, in the above-described embodiment, the description has been given of the molding of the lure. However, the present invention is also applicable to the DSI molding of other hollow articles. In this case, a remarkable effect can be expected if applied to a hollow product having an enclosed product or an insert product (particularly, a hollow product having an enclosed product).

【００４５】[0045]

【発明の効果】この発明は、一次成形後に、分割体に封
入品を載置し、あるいはインサート品の基端部金型の保
持手段で保持したので、封入品を封入したあるいはイン
サート品を埋め込んだ中空成形品を連続して成形でき
る。従って、一次成形、インサート品の載置、二次成形
と自動成形できるので、インサート品付き中空成形品、
特に釣り用ルアーの全自動成形を可能とする効果があ
る。According to the present invention, the encapsulated product is placed on the divided body after the primary molding or is held by the holding means of the die at the base end of the insert product, so that the encapsulated product is encapsulated or the insert product is embedded. A hollow molded product can be continuously formed. Therefore, primary molding, mounting of insert products, and secondary molding can be performed automatically, so hollow molded products with insert products,
In particular, there is an effect that the fishing lure can be fully automatically formed.

【００４６】また、分割体のずれがなく、成形される中
空成形品の精度を高め、バランスの良い中空成形品を得
ることができる。Further, there is no displacement of the divided body, the precision of the hollow molded article to be molded is improved, and a well-balanced hollow molded article can be obtained.

【００４７】また、ランナー内で溶解樹脂の注入圧力を
調節できるので、分割体は合わせ凸条を成形するのみで
溶解樹脂の漏れを防止できるので、一次成形の金型加工
を簡略化して、肉厚の薄い中空成形品を容易に成形でき
る効果がある。Further, since the injection pressure of the molten resin can be adjusted in the runner, the divided body can prevent the leakage of the molten resin only by forming the ridge, so that the mold processing of the primary molding can be simplified and the wall thickness can be reduced. There is an effect that a thin hollow molded article can be easily molded.

【図面の簡単な説明】[Brief description of the drawings]

【図１】この発明の実施例で成形される中空成形品の成
形過程を表す断面図であり、（ａ）は一次成形後の一方
の分割体、（ｂ）は分割体に金具を配置した状態、
（ｃ）は二次成形後の中空成形品（ルアー基体）、
（ｄ）は中空成形品（ルアー）の正面図である。1A and 1B are cross-sectional views illustrating a molding process of a hollow molded article molded in an embodiment of the present invention, wherein FIG. 1A illustrates one divided body after primary molding, and FIG. Status,
(C) is a hollow molded article (luer substrate) after the secondary molding,
(D) is a front view of the hollow molded article (luer).

【図２】（ａ）乃至（ｆ）は、この発明の形成方法を説
明する概略した断面図である。FIGS. 2A to 2F are schematic cross-sectional views illustrating a forming method of the present invention.

【図３】この発明の実施例の製造方法説明をする分割体
の断面図で、（ａ）は一次成形後、（ｂ）は二次成形
前、（ｃ）は二次成形後を夫々表す。3A and 3B are cross-sectional views of a divided body for explaining a manufacturing method according to an embodiment of the present invention, wherein FIG. 3A shows a state after primary molding, FIG. 3B shows a state before secondary molding, and FIG. .

【図４】二次成形用のランナー及び注入口の配置を示し
た平面図である。FIG. 4 is a plan view showing an arrangement of a runner for secondary molding and an injection port.

【図５】（ａ）（ｂ）は、この発明のランナー内の調節
ねじの縦断面図である。5 (a) and 5 (b) are longitudinal sectional views of an adjusting screw in a runner of the present invention.

【図６】この発明の実施例で、分割体の当接部を表す拡
大断面図である。FIG. 6 is an enlarged sectional view showing an abutting portion of a divided body in the embodiment of the present invention.

【図７】従来例の、分割体の当接部を表す拡大断面図で
ある。FIG. 7 is an enlarged sectional view showing a contact portion of a divided body according to a conventional example.

【図８】（ａ）乃至（ｃ）は従来例の成形方法を説明す
る概略した断面図である。FIGS. 8A to 8C are schematic cross-sectional views illustrating a conventional molding method.

【符号の説明】[Explanation of symbols]

１ 下金型装置 ２ 上金型装置 ３ 第一金型 ４ 第一雌型 ５ 第一雄型 ６ 第二金型 ７ 第二雌型 ８ 第二雄型 １０ 嵌合凹部 １２ 分割体 １３ 合わせ凸条（分割体１２） １４ 注入凹条（分割体１２） １５ 注入凹条（分割体１２） １６ 中仕切（分割体１２） １７ 分割体 １８ 合わせ凸条（分割体１７） １９ 注入凹条（分割体１７） ２０ 注入凹条（分割体１７） ２１ 注入溝（外周間隙） ２２ ランナー（一次成形） ２３ ランナー（二次成形） ２４ 注入口 ２６ ルアー基体（中空成形品） ２７ 金具（インサート品） ２８ 小鋼球 ３０ ルアー（中空成形品） ３１ 凹入部 ３１ａ 螺穴 ３２ 調節駒 ３３ 注入圧調節具（注入圧調節手段） ４１ 水平移動金型装置（従来例） ４２ 昇降金型装置（従来例） ４３ 第一金型（従来例） ４４ 第一雌型（従来例） ４５ 第一雄型（従来例） ４６ 第二金型（従来例） ４７ 第二雌型（従来例） ４８ 第二雄型（従来例） ４９、４９ａ 分割体（従来例） ５０ 中空品 REFERENCE SIGNS LIST 1 Lower mold apparatus 2 Upper mold apparatus 3 First mold 4 First female mold 5 First male mold 6 Second mold 7 Second female mold 8 Second male mold 10 Fitting concave part 12 Divided body 13 Matching convex Strip (divided body 12) 14 Injected recessed strip (divided body 12) 15 Injected recessed strip (divided body 12) 16 Middle partition (divided body 12) 17 Split body 18 Aligned convex strip (divided body 17) 19 Injected recessed strip (divided Body 17) 20 Injection concave strip (divided body 17) 21 Injection groove (outer peripheral gap) 22 Runner (primary molding) 23 Runner (secondary molding) 24 Injection port 26 Luer base (hollow molded article) 27 Metal fitting (insert product) 28 Small steel ball 30 Luer (hollow molded product) 31 Depressed portion 31a Screw hole 32 Adjustment piece 33 Injection pressure adjusting tool (Injection pressure adjusting means) 41 Horizontal moving mold device (Conventional example) 42 Elevating mold device (Conventional example) 43 First mold (conventional example) 44 First female mold ( Conventional example) 45 First male mold (Conventional example) 46 Second mold (Conventional example) 47 Second female mold (Conventional example) 48 Second male mold (Conventional example) 49, 49a Split body (Conventional example) 50 Hollow Goods

Claims (6)

【特許請求の範囲】[Claims] 【請求項１】 成形予定の中空成形品を２つ割にした一
方の分割体を夫々成形する第一雄型と第一雌型とからな
る第一金型が設けられ、該第一金型に近接して他方の分
割体を夫々成形する第二雄型と第二雌型とらなる第二金
型が設けられ、前記第一金型と第二金型とに溶解樹脂を
注入して一次成形をし、続いて第一金型、第二金型の一
方又は両方を移動して、前記両分割体が残留する前記両
雌型を対向させ、次に両雌型を閉じて両分割体を互いに
突き合わせて、次に、突き合わせ面又はその周縁に、溶
解樹脂を注入して両分割体を互いに溶着成形する二次成
形をして中空成形品を成形する中空成形方法において、
一次成形で、両分割体の内面側に互いに当接する合わせ
凸条を形成し、続いて、分割体の内部に封入品又は周縁
部にインサート品を配置し、続いて、一方の分割体の合
わせ凸条を他方の分割体の合わせ凸条とを対向当接さ
せ、次に両分割体の当接面間の外周間隙内に、圧力を調
節して溶解樹脂を注入して両分割体を互いに溶着して、
中空部内に封入品が封入され、又はインサート品を埋め
込んだ中空樹脂を成形することを特徴とした中空成形品
の成形方法。1. A first mold comprising a first male mold and a first female mold for molding one of the two divided halves of a hollow molded article to be molded, wherein the first mold is provided. A second mold that is a second male mold and a second female mold for molding the other divided body in proximity to each other is provided, and a molten resin is injected into the first mold and the second mold to form a primary mold. After molding, subsequently, one or both of the first mold and the second mold are moved so that the two female molds in which the two divided bodies remain are opposed to each other, and then the two female molds are closed to close the two divided bodies. Abutting each other, then, on the butting surface or the periphery thereof, in a hollow molding method of forming a hollow molded product by performing a secondary molding of injecting a molten resin and welding and molding the two divided bodies to each other,
In the primary molding, a mating ridge that abuts each other is formed on the inner surface side of both divided bodies, then, an enclosed product or an insert product is arranged inside the divided body, and then, the mating of one of the divided bodies is performed. The ridge is brought into contact with the mating ridge of the other divided body, and then the molten resin is injected into the outer circumferential gap between the contact surfaces of the two divided bodies by adjusting the pressure to bring the two divided bodies together. Welding
A method for molding a hollow molded article, characterized by molding a hollow resin in which an encapsulated article is enclosed in a hollow portion or an insert article is embedded. 【請求項２】 二次成形において、金型に連通するラン
ナーに注入圧調整手段を施して、金型内への溶解樹脂の
注入の停止を含めて、注入圧を調節することを特徴とし
た請求項１記載の中空成形品の成形方法。2. The secondary molding is characterized in that an injection pressure adjusting means is applied to a runner communicating with the mold to adjust the injection pressure including stopping the injection of the molten resin into the mold. A method for molding a hollow molded article according to claim 1. 【請求項３】 分割体のインサート品の設置位置に対応
させて、雌型の当接面にインサート品の保持手段を設け
たことを特徴とする請求項１記載の中空成形品の成形方
法。3. The method for molding a hollow molded product according to claim 1, wherein a holding means for the insert product is provided on the contact surface of the female mold corresponding to the installation position of the insert product of the divided body. 【請求項４】 同一樹脂により一体成形された中空部を
有する成形品であって、該中空部に移動可能に封入物が
封入されたことを特徴とする中空成形品。4. A hollow molded article having a hollow portion integrally formed of the same resin, wherein an enclosure is movably sealed in the hollow portion. 【請求項５】 一次成形により、成形予定の中空成形品
を２つ割にした形状の分割体を夫々成形し、続いて、前
記両分割体内に封入物を封入して両分割体を合わせると
共に、該合わせ目にインサート品の基端部を配置して、
該合わせ目に同一樹脂により二次成形して、前記インサ
ート品の先端部が突出すると共に中空部に移動可能に封
入物が封入された一体成形物としたことを特徴とする請
求項４記載の中空成形品。5. Each of the divided bodies having a shape obtained by dividing a hollow molded product to be molded into two by primary molding is formed, and subsequently, an enclosure is sealed in the two divided bodies to join the two divided bodies together. , Placing the base end of the insert at the joint,
5. The molded article according to claim 4, wherein the joint is secondarily molded with the same resin, and the tip of the insert product is protruded and the molded article is encapsulated so as to be movable in a hollow portion. Hollow molded products. 【請求項６】 樹脂は生分解性樹脂とし、成形品を釣り
用のルアーとした請求項４又は５記載の中空成形品。6. The hollow molded article according to claim 4, wherein the resin is a biodegradable resin, and the molded article is a fishing lure.