JP3566827B2 - Hollow product molding method and apparatus therefor - Google Patents

Hollow product molding method and apparatus therefor Download PDF

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Publication number
JP3566827B2
JP3566827B2 JP2827697A JP2827697A JP3566827B2 JP 3566827 B2 JP3566827 B2 JP 3566827B2 JP 2827697 A JP2827697 A JP 2827697A JP 2827697 A JP2827697 A JP 2827697A JP 3566827 B2 JP3566827 B2 JP 3566827B2
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JP
Japan
Prior art keywords
mold
semi
molded product
hollow
joining
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Expired - Fee Related
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JP2827697A
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Japanese (ja)
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JPH10211629A (en
Inventor
託巳 山本
聡 大橋
省吾 井沢
芳郎 服部
正三 西田
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Japan Steel Works Ltd
Aisin Corp
Original Assignee
Aisin Seiki Co Ltd
Japan Steel Works Ltd
Aisin Corp
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Priority to JP2827697A priority Critical patent/JP3566827B2/en
Publication of JPH10211629A publication Critical patent/JPH10211629A/en
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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C45/00—Injection moulding, i.e. forcing the required volume of moulding material through a nozzle into a closed mould; Apparatus therefor
    • B29C45/0053—Injection moulding, i.e. forcing the required volume of moulding material through a nozzle into a closed mould; Apparatus therefor combined with a final operation, e.g. shaping
    • B29C45/006—Joining parts moulded in separate cavities
    • B29C45/0062—Joined by injection moulding
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C45/00—Injection moulding, i.e. forcing the required volume of moulding material through a nozzle into a closed mould; Apparatus therefor
    • B29C45/0053—Injection moulding, i.e. forcing the required volume of moulding material through a nozzle into a closed mould; Apparatus therefor combined with a final operation, e.g. shaping
    • B29C45/006—Joining parts moulded in separate cavities
    • B29C2045/0072—Joining parts moulded in separate cavities the parts to be joined being moulded in a stack mould
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C45/00—Injection moulding, i.e. forcing the required volume of moulding material through a nozzle into a closed mould; Apparatus therefor
    • B29C45/03—Injection moulding apparatus
    • B29C45/04—Injection moulding apparatus using movable moulds or mould halves
    • B29C45/0408—Injection moulding apparatus using movable moulds or mould halves involving at least a linear movement
    • B29C45/0416—Injection moulding apparatus using movable moulds or mould halves involving at least a linear movement co-operating with fixed mould halves
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C45/00—Injection moulding, i.e. forcing the required volume of moulding material through a nozzle into a closed mould; Apparatus therefor
    • B29C45/03—Injection moulding apparatus
    • B29C45/04—Injection moulding apparatus using movable moulds or mould halves
    • B29C45/0441—Injection moulding apparatus using movable moulds or mould halves involving a rotational movement
    • B29C45/045—Injection moulding apparatus using movable moulds or mould halves involving a rotational movement mounted on the circumference of a rotating support having a rotating axis perpendicular to the mould opening, closing or clamping direction
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C45/00—Injection moulding, i.e. forcing the required volume of moulding material through a nozzle into a closed mould; Apparatus therefor
    • B29C45/16—Making multilayered or multicoloured articles
    • B29C45/1615—The materials being injected at different moulding stations
    • B29C45/1628—The materials being injected at different moulding stations using a mould carrier rotatable about an axis perpendicular to the opening and closing axis of the moulding stations
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C66/00—General aspects of processes or apparatus for joining preformed parts
    • B29C66/50—General aspects of joining tubular articles; General aspects of joining long products, i.e. bars or profiled elements; General aspects of joining single elements to tubular articles, hollow articles or bars; General aspects of joining several hollow-preforms to form hollow or tubular articles
    • B29C66/51—Joining tubular articles, profiled elements or bars; Joining single elements to tubular articles, hollow articles or bars; Joining several hollow-preforms to form hollow or tubular articles
    • B29C66/54—Joining several hollow-preforms, e.g. half-shells, to form hollow articles, e.g. for making balls, containers; Joining several hollow-preforms, e.g. half-cylinders, to form tubular articles

Description

【０００１】
【発明の属する技術分野】
本発明は、合成樹脂製の中空製品の成形法およびそのための装置に関し、特に詳述すれば、中型を用いかつ該中型を反転させる成形法とそのための装置に関する。
【０００２】
【従来の技術】
合成樹脂製の中空成形品を製造する方法は、ブロー成形や熱板溶着、振動溶着、超音波溶着、接着剤による接着等の２分割接合法が知られているが、射出成形のみで得る方法としては特開昭６２−８７３１５号公報に開示される。この例を、図７と図８に示すが、従来の中空成形方法は、スプルー２と雄型３と雌型４とを有するスライド金型５と、雄型６と雌型７とを有する可動金型８と、スプルー２に接続される射出シリンダ９とを備える構造である。半成形品の製造に際し、先ず、図７のように、両金型５、８を対向させ、射出シリンダ９を用い溶融樹脂をスプルー２とランナー１０を介して成形空間に注入させ、半成形品を製造する。次いで、可動金型８を左方へ開き、さらにスライド金型５を上方へスライドさせた後、一方の雌型４を他方の雌型７に対向させ、半成形品の開口縁を対向させ、図８に示す状態を得る。同じ射出シリンダ９を用い、他方のスプルー２を介して、対向する半製品の縁まわりに接合用樹脂を注入し、中空最終製品１１を得る。次に、両金型５、８を離し、中空最終製品１１を両金型５、８から取り出す。
【０００３】
【発明が解決しようとする課題】
前述した従来の中空品の成形手法は、半成形品を左右にずらした位置にて同時成形することから大きな型締力を必要とする（型締力は、型締め方向からみた半成形品の投影面積で決まることから、半成形品を左右にずらした配置（並列配置）は同一配置の配置（直列配置）にある場合に比べ、２倍以上の大きさが必要となる。）。
さらに、従来の成形手法は、成形用ノズルと接合用ノズルとを同一とさせているため、半成形品の接合に適した条件（成形樹脂温度、材料、シリンダサイズ等）での溶融樹脂の注入が不可能である欠点を有す。
【０００４】
それ故に、本発明は、前述した従来技術の不具合を解消させることを解決すべき課題とする。
【０００５】
【課題を解決するための手段】
本発明は、前述した課題を解決するために、基本的には、固定型と可動型との間に中型を配し、固定型と中型との間で一方の半成形品、中型と可動型との間で他方の半成形品を成形し、中型を反転させて両成形品を合せ、その合せ面に接合用溶融樹脂を提供させる手段を採用する。
第１成形で半成形品を成形するのに必要なロア型は、第２成形において、移動しなければならない。従来技術では、成形機タイバーと干渉しないように設備を大きくする必要があるが、この手段の採用は、半成形品を中型に保持したまゝ反転させることによって、半成形品同志を対向させるので装置をコンパクトにさせ得る。加えて、中型の両面で半成形品を同時成形するので型締力は従来に比し半減できる。
【０００６】
具体的には、本発明は、固定型の凹形面に中型の凸形面を対向させ半成形品用キャビティを作ること、中型の凹形面を可動型の凸形面に対向させ半成形品用キャビティを作ること、固定型、中型および可動型を型締めすること、各キャビティに溶融樹脂を射出させ半成形品を作ること、各型を離反させかつ中型を反転させ半成形品を対向させること、対向させた後に各型を型締めすること、接合用シリンダを用い半成形品の合せ面に接合用樹脂を供給し中空成形品を得ること、型から中空成形品を抜き取ることよりなる中空製品の成形法を提供する。
【０００７】
さらに、本発明は、凹又は凸形面を有する固定型、一面に凸形面および他面に凹形面を有しかつ反転自在な中型、凸又は凹形面を有する可動型と、固定型と中型との間および中型と可動型との間の半成形品用キャビティに溶融樹脂を射出させる成形用シリンダと、中型を反転させ半成形品を合せたときその合せ面に接合用樹脂を供給する接合用シリンダとを有する中空製品の成形装置を提供する。
【０００８】
【発明の実施の形態】
中空製品の成形装置２１は、固定型２２、中型２３、可動型２４を含み、固定型２２はその一面に凹形面２５を、又その他面に成形用樹脂シリンダ２６と接合用樹脂シリンダ２７を有す。成形用シリンダ２６は、凹形面２５の中央部に通じるホットランナー２８へ接続され、又、接合用シリンダ２７は凹形面２５の側面に通じる整合用ランナー２９に接続される。固定型２２の凹形面２５を作る側壁の外側に押え面３０を作る。
【０００９】
中型２３の一面を凸形面３１とさせ、他面を凹形面３２とさせる。中型２３はその中央部にホットランナー２８に通じるランナー３３を有し、凸形面３１の両側に押えブロック３４を設ける。
中型２３は中心３５まわりに反転（角度にして１８０度）自在であり、固定型２２の凹形面２５に、中型２３の凸形面３１又は凹形面３２を選択的に対向可能とさせる。
【００１０】
可動型２１は固定型２２に接近又は離反するよう移動可能であり、その一面に凸形面３６を有し、側部に押えブロック３７を有す。
【００１１】
固定型２２に対し、中型２３と可動型２４を合せ型締めする。固定型２２と中型２３との間に半成形品用キャビティを、又、中型２３と可動型２４との間に残りの半成形品のためのキャビティを作り、これらキャビティへ、ホットランナー２８とランナー３３を介して、成形用シリンダ２６を用い溶融樹脂を射出させる。
かくして、各キャビティに最終中空製品を半割した形の対の半成形品３８、３９が得られる（図２参照）。
次いで、中型２３と可動型２４とを互いに離反させる（図３参照）。
【００１２】
中型２３を反転させ、半成形品３９を、固定型２２の半成形品３８に対向させ、さらに、中型２３の押えブロック３４を可動型２４の押えブロック３７に対向させる（図４参照）。
【００１３】
中型２３を反転させた後、図５に示すように、固定型２２と中型２３と可動型２４とを合せ型締めする。向い合う半成形品３８、３９の開口縁側面に、ランナー２９を介して、接合用ノズル２７より接合用樹脂を供給する。かくして、中空製品が成形される。中空製品の成形完了後、中型２３と可動型２４を移動させ、中空製品を取り出す。
型締めは直圧式のものとするが、キャビティを向い合せて半成形品を作るので、金型の型締力は従来に比し、小さな値のもので良い。また、設備のサイズも、金型をスライドする事なしで、成形品を対向させる事ができるため、成形品が長いものでも小型の設備で良い。
【００１４】
図６に成形装置４０を示す。そのベース４１上に、成形用シリンダ２６、接合用シリンダ２７および固定型２２を保持する固定型用フレーム４２を固定させる。固定型用フレーム４２に離間対向させて直圧式型締めシリンダ４３をベース４１に固定させる。直圧式型締めシリンダ４３と固定型用フレーム４２とは複数個のタイバー４４にて連結され、これらタイバー４４に沿って移動自在な中型用フレーム４５と可動型用フレーム４６を配す。両フレーム４５、４６の動きはタイバー４４とベース４１上のレール４７により案内される。
中型２３は中型用フレーム４５に対して回転中心３５まわりに反回転自在に支持される。中型２３の半回転はシリンダ４８にて行い、中型用フレーム４５の前後動はシリンダ４９を用いて行う。可動型用フレーム４６の前後動は直圧式型締めシリンダ４３にて行う。５０は中型２３の位置決めストッパー用のシリンダである。
【００１５】
シリンダ４９を操作して中型用フレーム４５を固定型用フレーム４２に対して前後進させ、又、シリンダ４８を操作して中型２３を中型用フレーム４５内で回転中心３５を中心に反転させる。シリンダ４３の作動は型締めを可能にする。
尚、各型２２、２３、２４の動きは図１〜図５に従って説明した通りである。
【図面の簡単な説明】
【図１】固定型、中型、可動型を示す図である。
【図２】半成形品の成形を示す図である。
【図３】中型を他の型から離反させた状態を示す図である。
【図４】中型を反転させ半成形品を対向させた状態を示す図である。
【図５】半成形品を接合している状態を示す図である。
【図６】中空製品の成形装置の全体を示す斜視図である。
【図７】従来の成形手段を示す図である。
【図８】従来の半成形品の接合状態を示す図である。
【符号の説明】
２２ 固定型
２３ 中型
２４ 可動型
２５、３２ 凹形面
２６ 成形用シリンダ
２７ 接合用シリンダ
２８ ホットランナー
２９ 接合用ランナー
３１、３６ 凸形面
３５ 回転中心
３、３４、３７ 押えブロック
３８、３９ 半成形品[0001]
TECHNICAL FIELD OF THE INVENTION
The present invention relates to a method of molding a hollow product made of synthetic resin and an apparatus therefor, and more particularly, to a molding method using a middle mold and inverting the middle mold, and an apparatus therefor.
[0002]
[Prior art]
As a method of manufacturing a hollow molded article made of a synthetic resin, a two-piece joining method such as blow molding, hot plate welding, vibration welding, ultrasonic welding, and bonding with an adhesive is known, but a method obtained by injection molding alone. Are disclosed in JP-A-62-87315. This example is shown in FIG. 7 and FIG. 8. In the conventional hollow molding method, a movable mold having a slide mold 5 having a sprue 2, a male mold 3 and a female mold 4, and a male mold 6 and a female mold 7 is shown. This is a structure including a mold 8 and an injection cylinder 9 connected to the sprue 2. In manufacturing a semi-molded product, first, as shown in FIG. 7, the two dies 5 and 8 are opposed to each other, and a molten resin is injected into a molding space via the sprue 2 and the runner 10 by using an injection cylinder 9. To manufacture. Next, the movable mold 8 is opened to the left, and the slide mold 5 is further slid upward. Then, one female mold 4 is opposed to the other female mold 7 and the opening edge of the semi-molded article is opposed. The state shown in FIG. 8 is obtained. Using the same injection cylinder 9, the joining resin is injected around the edge of the facing semi-finished product through the other sprue 2 to obtain a hollow final product 11. Next, the two molds 5 and 8 are separated, and the hollow final product 11 is taken out from both molds 5 and 8.
[0003]
[Problems to be solved by the invention]
The above-described conventional molding method of a hollow product requires a large mold clamping force because the semi-molded product is simultaneously molded at a position shifted to the left and right (the mold clamping force is a force of the semi-molded product viewed from the mold clamping direction). Since it is determined by the projection area, the arrangement in which the semi-molded products are shifted to the left and right (parallel arrangement) requires twice or more the size as compared with the case of the same arrangement (serial arrangement).)
Furthermore, in the conventional molding method, since the molding nozzle and the joining nozzle are the same, the injection of the molten resin under conditions (molding resin temperature, material, cylinder size, etc.) suitable for joining the semi-molded product. Has the disadvantage that it is not possible.
[0004]
Therefore, an object of the present invention is to solve the above-described disadvantages of the related art.
[0005]
[Means for Solving the Problems]
In order to solve the above-mentioned problems, the present invention basically arranges a middle mold between a fixed mold and a movable mold, and forms one half-molded product between the fixed mold and the middle mold, the middle mold and the movable mold. The other half-molded product is molded between the two, and the middle mold is turned over to combine the two molded products, and a means for providing a joining molten resin to the mating surface is adopted.
The lower mold required to mold the semi-molded article in the first molding must move in the second molding. In the prior art, it is necessary to enlarge the equipment so as not to interfere with the tie bar of the molding machine.However, adoption of this means causes the semi-molded products to face each other by inverting while holding the semi-molded product in the middle mold. The device can be made compact. In addition, since the semi-molded product is simultaneously molded on both sides of the middle mold, the mold clamping force can be reduced by half compared to the conventional case.
[0006]
Specifically, the present invention provides a cavity for a semi-molded article by making the convex surface of the middle mold face the concave surface of the fixed mold, and forming the semi-molded product by making the concave surface of the middle mold face the convex surface of the movable mold. Making cavities for products, clamping fixed dies, middle dies and movable dies, injecting molten resin into each cavity to make semi-molded products, separating each mold and inverting the middle dies to face semi-molded products Making the molds clamp each other after facing each other, supplying a joining resin to the mating surface of the semi-molded product using a joining cylinder to obtain a hollow molded product, and extracting the hollow molded product from the mold. A method for forming a hollow product is provided.
[0007]
Further, the present invention provides a fixed mold having a concave or convex surface, a movable mold having a convex surface on one surface and a concave surface on the other surface and a reversible medium, a movable mold having a convex or concave surface, and a fixed mold. A molding cylinder that injects molten resin into the cavity for the semi-molded product between the mold and the middle mold and between the middle mold and the movable mold, and a joining resin is supplied to the mating surface when the semi-molded product is assembled by inverting the middle mold. The present invention provides an apparatus for forming a hollow product having a joining cylinder to be formed.
[0008]
BEST MODE FOR CARRYING OUT THE INVENTION
The hollow product molding apparatus 21 includes a fixed mold 22, a middle mold 23, and a movable mold 24. The fixed mold 22 has a concave surface 25 on one surface, and a molding resin cylinder 26 and a joining resin cylinder 27 on the other surface. Have The molding cylinder 26 is connected to a hot runner 28 leading to the center of the concave surface 25, and the joining cylinder 27 is connected to an alignment runner 29 leading to the side surface of the concave surface 25. A holding surface 30 is formed on the outside of the side wall on which the concave surface 25 of the fixed mold 22 is formed.
[0009]
One surface of the middle mold 23 is a convex surface 31 and the other surface is a concave surface 32. The middle mold 23 has a runner 33 communicating with the hot runner 28 at the center thereof, and holding blocks 34 on both sides of the convex surface 31.
The middle mold 23 can be inverted (180 degrees in angle) around the center 35 so that the convex surface 31 or the concave surface 32 of the middle mold 23 can selectively face the concave surface 25 of the fixed mold 22.
[0010]
The movable mold 21 is movable so as to approach or separate from the fixed mold 22, has a convex surface 36 on one surface thereof, and has a holding block 37 on a side portion.
[0011]
The middle mold 23 and the movable mold 24 are joined and clamped to the fixed mold 22. A cavity for the semi-molded article is formed between the fixed mold 22 and the middle mold 23, and a cavity for the remaining semi-molded article is formed between the middle mold 23 and the movable mold 24. The hot runner 28 and the runner The molten resin is injected using the molding cylinder 26 through 33.
Thus, a pair of semi-molded products 38, 39 in which the final hollow product is divided in half in each cavity is obtained (see FIG. 2).
Next, the middle mold 23 and the movable mold 24 are separated from each other (see FIG. 3).
[0012]
The half mold 23 is turned over so that the semi-molded product 39 faces the semi-molded product 38 of the fixed mold 22, and the holding block 34 of the middle mold 23 faces the holding block 37 of the movable mold 24 (see FIG. 4).
[0013]
After inverting the middle mold 23, as shown in FIG. 5, the fixed mold 22, the middle mold 23 and the movable mold 24 are combined and clamped. The joining resin is supplied from the joining nozzle 27 to the side surfaces of the opening edges of the facing semi-molded products 38 and 39 via the runner 29. Thus, a hollow product is formed. After the molding of the hollow product is completed, the middle mold 23 and the movable mold 24 are moved to take out the hollow product.
Although the mold clamping is of a direct pressure type, since a semi-molded product is made with the cavities facing each other, the mold clamping force of the mold may be smaller than in the past. In addition, since the molded products can be opposed to each other without sliding the mold, even if the molded products are long, a small facility may be used.
[0014]
FIG. 6 shows a molding device 40. On the base 41, a fixed mold frame 42 holding the molding cylinder 26, the joining cylinder 27, and the fixed mold 22 is fixed. The direct pressure type mold clamping cylinder 43 is fixed to the base 41 so as to be separated from and opposed to the fixed frame 42. The direct pressure type clamping cylinder 43 and the fixed type frame 42 are connected by a plurality of tie bars 44, and a middle type frame 45 and a movable type frame 46 which are movable along these tie bars 44 are arranged. The movement of both frames 45, 46 is guided by tie bars 44 and rails 47 on base 41.
The middle mold 23 is supported on the middle frame 45 so as to be rotatable around the rotation center 35. Half rotation of the middle mold 23 is performed by the cylinder 48, and forward and backward movement of the middle frame 45 is performed by the cylinder 49. The movable mold frame 46 is moved back and forth by the direct pressure mold clamping cylinder 43. Reference numeral 50 denotes a cylinder for a positioning stopper of the middle die 23.
[0015]
The cylinder 49 is operated to move the medium frame 45 back and forth with respect to the fixed frame 42, and the cylinder 48 is operated to reverse the medium 23 around the rotation center 35 in the medium frame 45. Actuation of the cylinder 43 allows for mold clamping.
The movements of the dies 22, 23, and 24 are as described with reference to FIGS.
[Brief description of the drawings]
FIG. 1 is a view showing a fixed type, a medium type, and a movable type.
FIG. 2 is a view showing molding of a semi-molded product.
FIG. 3 is a diagram showing a state where a middle mold is separated from another mold.
FIG. 4 is a diagram showing a state in which a middle mold is turned upside down and a semi-molded product is opposed to the half-mold.
FIG. 5 is a view showing a state in which semi-molded articles are joined.
FIG. 6 is a perspective view showing the entire molding apparatus for hollow products.
FIG. 7 is a view showing a conventional molding means.
FIG. 8 is a view showing a joining state of a conventional semi-molded product.
[Explanation of symbols]
22 Fixed die 23 Medium die 24 Movable die 25, 32 Concave surface 26 Molding cylinder 27 Joining cylinder 28 Hot runner 29 Joining runner 31, 36 Convex surface 35 Center of rotation 3, 34, 37 Holding block 38, 39 Semi-molding Goods

Claims (5)

固定型の凹形面に中型の凸形面を対向させ半成形品用キャビティを作ること、中型の凹形面を可動型の凸形面に対向させ半成形品用キャビティを作ること、固定型、中型および可動型を型締めすること、各キャビティに溶融樹脂を射出させ半成形品を作ること、各型を離反させかつ中型を反転させ半成形品を対向させること、対向させた後に各型を型締めすること、接合用シリンダを用い半成形品の合せ面に接合用樹脂を供給し中空成形品を得ること、型から中空成形品を抜き取ることよりなる中空製品の成形法。Making the cavity for the semi-molded product with the convex surface of the middle mold facing the concave surface of the fixed mold, making the cavity for the semi-molded product with the concave surface of the middle mold facing the convex surface of the movable mold, Clamping the middle and movable molds, injecting the molten resin into each cavity to make a semi-molded product, separating each mold and inverting the middle mold to face the semi-molded product, and after facing each mold A hollow molding product by supplying a joining resin to a mating surface of a semi-molded product using a joining cylinder to obtain a hollow molded product, and extracting the hollow molded product from the mold. 凹又は凸形面を有する固定型、一面に凸形面および他面に凹形面を有しかつ反転自在な中型、凸又は凹形面を有する可動型と、固定型と中型との間および中型と可動型との間の半成形品用キャビティに溶融樹脂を射出させる成形用シリンダと、中型を反転させ半成形品を合せたときその合せ面に接合用樹脂を供給する接合用シリンダとを有する中空製品の成形装置。A fixed mold having a concave or convex surface, a medium mold having a convex surface on one side and a concave surface on the other side and a reversible medium, a movable mold having a convex or concave surface, between a fixed mold and a medium mold, and A molding cylinder that injects the molten resin into the cavity for the semi-molded product between the middle mold and the movable mold, and a joining cylinder that supplies the joining resin to the mating surface when the semi-molded product is assembled by inverting the middle mold. Equipment for forming hollow products. 中型と可動型とが押えブロックを有し、中型を反転させたとき該ブロックが対向する請求項２記載の中空製品の成形装置。The hollow product forming apparatus according to claim 2, wherein the middle mold and the movable mold have a holding block, and the blocks face each other when the middle mold is inverted. 固定型が成形用のホットランナーと接合用の接合ランナーを有し、該ホットランナーが中型のランナーに接続する請求項３記載の中空製品の成形装置。4. The apparatus for molding a hollow product according to claim 3, wherein the fixed mold has a hot runner for molding and a joining runner for joining, and the hot runner is connected to a middle-sized runner. 中型と可動型とが同一軌道上を移動する請求項４記載の中空製品の成形装置。5. The apparatus for forming a hollow product according to claim 4, wherein the middle mold and the movable mold move on the same track.
JP2827697A 1997-01-29 1997-01-29 Hollow product molding method and apparatus therefor Expired - Fee Related JP3566827B2 (en)

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US20020185777A1 (en) * 2001-06-08 2002-12-12 Boath John R. Modular lay-up mold for a composite article and method of manufacture therefor
EP1993804B1 (en) * 2006-02-23 2013-03-27 Foboha Gmbh Formenbau Multi-component injection molding device
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