JPS6287315A - Molding of hollow molded part and mold used therefor - Google Patents

Molding of hollow molded part and mold used therefor

Info

Publication number
JPS6287315A
JPS6287315A JP60227761A JP22776185A JPS6287315A JP S6287315 A JPS6287315 A JP S6287315A JP 60227761 A JP60227761 A JP 60227761A JP 22776185 A JP22776185 A JP 22776185A JP S6287315 A JPS6287315 A JP S6287315A
Authority
JP
Japan
Prior art keywords
mold
female
hollow molded
male
sprue
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
JP60227761A
Other languages
Japanese (ja)
Other versions
JPH0238377B2 (en
Inventor
Shozo Nishida
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
Original Assignee
Japan Steel Works Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Japan Steel Works Ltd filed Critical Japan Steel Works Ltd
Priority to JP60227761A priority Critical patent/JPS6287315A/en
Publication of JPS6287315A publication Critical patent/JPS6287315A/en
Publication of JPH0238377B2 publication Critical patent/JPH0238377B2/ja
Granted legal-status Critical Current

Links

Classifications

    • 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
    • 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

Landscapes

  • Engineering & Computer Science (AREA)
  • Manufacturing & Machinery (AREA)
  • Mechanical Engineering (AREA)
  • Jigs For Machine Tools (AREA)
  • Moulds For Moulding Plastics Or The Like (AREA)
  • Injection Moulding Of Plastics Or The Like (AREA)

Abstract

PURPOSE:To allow to easily mass-produce a hollow molded part by a low-cost system by a method wherein a molding process is performed by shifting molds and injecting molten resins. CONSTITUTION:Firstly, a movable mold 4 is mated with a sliding mold 3, which is positioned at its lower position by extending a cylinder 9 so as to mold two bisected split bodies 31 and 32 of a hollow molded part by injecting molten resin from an injection machine 11. By separating the movable mold 4 from the sliding mold after the cooling and solidification of the molten resin, the respective split bodies 31 and 32 are left on female mold sides 17 and 16 independently. Secondly, by shifting the sliding mold 3 to its upper position with the contraction of the cylinder 9 and, after that, by shifting the movable mold 4 to the sliding mold 3 side, the mating surfaces 31a and 32a of the respective split bodies 31 and 32 are abutted against with each other. When molten resin is injected from the injection machine 11 under the state just mentioned above, the molten resin is filled in the abutted peripheral edge parts of the respective split bodies 31 and 32. By opening the molds after the resin 34 at the peripheral edge part is cooled and solidified, a hollow molded product is obtained, because the respective split bodies 31 and 32 abutted and welded each other.

Description

【発明の詳細な説明】 （産業上の利用分野） 本発明は、合成樹脂製の中空成形品を成形する方法とそ
れに用いられる金型に関するもので、特に、射出成形機
による中空成形品の成形方法及びその金型に関するもの
である。Detailed Description of the Invention (Field of Industrial Application) The present invention relates to a method for molding a hollow molded product made of synthetic resin and a mold used therein. The present invention relates to a method and a mold thereof.

（従来の技術） 合成樹脂製の中空成形品を製造する方法としては、中空
成形機による成形方法と射出成形機による成形方法とが
ある。(Prior Art) Methods for manufacturing synthetic resin hollow molded products include a molding method using a blow molding machine and a molding method using an injection molding machine.

このうち中空成形機による成形方法は、アキュムレータ
ヘッドにＪ：り溶融樹脂を円筒状のパリソンとして押し
出し成形し、そのパリソンを両側から金型によって挟み
付け、その内部に空気を吹き込むようにしたものである
ゆびん等の液体容器は、このような成形方法によって容
易に量産することができる。Among these, the molding method using a blow molding machine involves extruding molten resin into an accumulator head as a cylindrical parison, sandwiching the parison between molds from both sides, and blowing air into the inside. Liquid containers such as certain bottles can be easily mass-produced by such a molding method.

しかしながら、この方法では、パリソンを金型によって
挟み付けるようにするために、製品の上下に比較的太き
なばりが残ることは避けられず、その除去作業に手間が
かかるという問題がある。また、内部に空気を吹き込む
ためのノズル孔が必ず製品に残ることになるので、完全
密封された中空成形品を１ｔすることはできない。However, in this method, because the parison is sandwiched between the molds, it is inevitable that relatively thick burrs remain on the top and bottom of the product, and there is a problem in that removing the burrs is time-consuming. Furthermore, since a nozzle hole for blowing air into the product always remains in the product, it is not possible to produce a completely sealed hollow molded product in 1 ton.

更に、均一な肉厚の成形品を得ることは困難であり、得
られる成形品の肉厚にも限界がある。Furthermore, it is difficult to obtain a molded article with a uniform wall thickness, and there is a limit to the thickness of the molded article that can be obtained.

そこで、完全密封された中空成形品や厚内の中空成形品
、あるいは厚肉の部分と薄肉の部分とを有する複雑な形
状の中空成形品等を製造する場合には、射出成形機によ
る成形方法が用いられている。この方法では、まず、射
出成形機により、中空成形品を二つ割りした分割体をそ
れぞれ成形し、その分割体を金型から外して互いに突き
合わせる。そして、その突き合わせ面を、加熱するなど
により互いに溶着、あるいは接着剤により接着して、中
空成形品を得るようにする。Therefore, when manufacturing completely sealed hollow molded products, thick hollow molded products, or hollow molded products with complex shapes that have thick and thin parts, the molding method using an injection molding machine is recommended. is used. In this method, first, an injection molding machine is used to mold a hollow molded product into two halves, and the halves are removed from the mold and butted against each other. Then, the abutted surfaces are welded to each other by heating or otherwise bonded with an adhesive to obtain a hollow molded product.

（発明が解決しようとする問題点） しかしながら、このような成形方法では、二つ割りの分
割体を互いに溶着あるいは接着する工程が必要となるが
、そのような工程を自動化することは非常に難しい。そ
のために、この射出成形機による中空成形品の成形方法
は、量産化には適さないものとなっている。また、特に
その分割体を互いに接着するようにした場合には、得ら
れる中空成形品は、その接合部分の強度が弱いものとな
るなどの問題もある。(Problems to be Solved by the Invention) However, such a molding method requires a step of welding or gluing the two halves together, but it is very difficult to automate such a step. Therefore, the method of molding a blow molded product using this injection molding machine is not suitable for mass production. In addition, especially when the divided bodies are bonded together, there is a problem that the resulting hollow molded product has a weak strength at the bonded portion.

本発明は、このような問題に鑑みてなされたものであっ
て、その主な［１的は、厚肉で、しかも完全密封の中空
成形品であっても、任意の形状のものが量産できるよう
にすることである。The present invention was made in view of these problems, and the main point is that it is possible to mass-produce thick-walled and completely sealed hollow molded products of any shape. It is to do so.

また、本発明の他の目的は、１台の射出成形機を用いる
だけで、中空成形品が連続的に成形されるようにするこ
とである。Another object of the present invention is to enable continuous molding of hollow molded products using only one injection molding machine.

（問題点を解決するための手段） この目的を達成するために、本発明では、−・方の金型
に中空成形品を二つ割りした分割体をそれぞれ成形する
雄型と雌型とが設けられ、他方の金型にその雄型と雌型
とに対向する雌型と雄型とが設けられた一組の金型を用
い、その金型によって各分割体を同時に射出成形した後
、一方の金型をスライドさせて、各雌型に残された分割
体を互いに対向させ、各金型を型合わせすることにより
その分割体を互いに突き合わせるようにしている。そし
て、その突き合わせ面の周縁に溶融樹脂を射出して、各
分割体を互いに溶着するようにしている。(Means for solving the problem) In order to achieve this object, in the present invention, a male mold and a female mold are provided in the mold on the side of the mold to respectively mold a divided body obtained by dividing a hollow molded product into two. , using a pair of molds in which the other mold is provided with a female mold and a male mold that are opposed to the male mold and the female mold, and after injection molding each divided body simultaneously with the mold, one By sliding the mold, the divided bodies left in each female mold face each other, and by aligning the molds, the divided bodies are brought into contact with each other. Then, molten resin is injected onto the periphery of the abutting surfaces to weld the divided bodies together.

また、その金型は、中−のスプルーを有する固定型と、
その固定型に沿って移動されるスライド型と、そのスラ
イド型に型合わせされる可動型とにより４＃成するよう
にしている。そのスライド型には、二つ割りの分割体の
一方を成形する雄型とその他方を成形する雌型とが設け
られている。また、可動型には、これら雄型及び雌型に
対応する雌型と雄型とが設けられている。スライド型は
、その雄型及び雌型が可動型の雌型及び雄型にそれぞれ
対向する位置と、その雌型が可動型の雌型に対向する位
置との二位置間で移動されるようになっている。そして
、スライド型には、その二位置において固定型のスプル
ーに連続するサブスプルーが設けられている。そのサブ
スプルーは、スライド型及び可動型の各雌型の端縁部に
連通するようにされている。更に、各雄型には、各分割
体の突き合わせ面周縁に溝を成形する突起が設けられて
いる。The mold also includes a fixed mold with a medium sprue,
A slide mold that moves along the fixed mold and a movable mold that is matched to the slide mold form a 4-piece mold. The slide mold is provided with a male mold for molding one of the two halves and a female mold for molding the other. Moreover, the movable mold is provided with a female mold and a male mold corresponding to these male mold and female mold. The slide mold is moved between two positions: a position where the male mold and the female mold are opposite to the female mold and the male mold of the movable mold, and a position where the female mold is opposite to the female mold of the movable mold. It has become. The slide mold is provided with a sub-sprue that is continuous with the fixed sprue at the two positions. The sub-sprue communicates with the end edges of each female mold of the sliding mold and the movable mold. Furthermore, each male die is provided with a protrusion that forms a groove on the periphery of the abutting surface of each divided body.

（作用） このような方法とすることにより、１台の射出成形機を
用い、一組の金型の型合わせ、溶融樹脂の射出、７Ｆ７
＋川き、及び一方の金型のスライドという一連の工程を
繰り返すだけで、まず、二つ割りの分割体が同時に成形
され、次いでそれらの分割体が突き合わせ溶着されて、
中空成形品が成形されるようになる。したがって、その
成形工程は容易に自動化することができ、に産化が可能
となる。そ１７て、その分割体は金型を用いて射出成形
されるので、任意の形状、任意の肉厚に成形することが
でき、その分割体を突き合わせ溶着することにより、完
全密封された中空成形品をも得ることができるようにな
る。また、その分割体の溶着は、その分割体と同じ材質
の溶融樹脂によってなされるので、１−分な大きさの溶
着強度をイそＩることができる。(Function) By using such a method, one injection molding machine can be used to match a set of molds, inject molten resin, 7F7
By simply repeating the series of steps of + cutting and sliding one of the molds, first, the two divided bodies are molded at the same time, and then those divided bodies are butt welded.
Hollow molded products began to be molded. Therefore, the molding process can be easily automated and commercialization is possible. 17. Since the divided bodies are injection molded using a mold, they can be molded into any shape and thickness, and by butt welding the divided bodies, completely sealed hollow molding can be achieved. You will also be able to obtain items. Furthermore, since the divided bodies are welded using molten resin of the same material as the divided bodies, the welding strength can be increased by one minute.

更に、その金型を（―述のように構成することにより、
一組の金型だけで、各分割体の成形とその溶着とを行わ
せることができるようになる。しかも、スライド型がい
ずれの位置にあるときにも、そのサブスプルーが固定型
に設けられた単一・のスプルーに連続し、そのスプルー
から供給される溶融樹脂な各雌型に導くようにされてい
るので、溶融樹脂を射出する射出機は１台でよいことに
なる。Furthermore, by configuring the mold as described above,
With only one set of molds, it becomes possible to mold and weld each divided body. Furthermore, when the slide mold is in any position, the sub-sprue is continuous with a single sprue provided on the fixed mold, and the molten resin supplied from the sprue is guided to each female mold. Therefore, only one injection machine is required to inject the molten resin.

（実施例） 以下、図面を用いて本発明の詳細な説明する。(Example) Hereinafter, the present invention will be explained in detail using the drawings.

図中、第１図は本発明による中空成形品の成形用金型の
一実施例を示す縦断面図であり、第２〜８図は、その金
型を用いた中空成形品の成形方法を説明するための、各
工程における金型の状態を示す縦断面図である。In the drawings, FIG. 1 is a longitudinal sectional view showing an embodiment of a mold for forming a hollow molded product according to the present invention, and FIGS. 2 to 8 show a method for molding a hollow molded product using the mold. It is a longitudinal cross-sectional view showing the state of the mold in each step for explanation.

第１図から明らかなように、この成形用金型１は、固定
型２、スライド型３、及び可動型４から構成されている
。固定型２は、射出成形機５のベッド６と一体の固定盤
７に固定されている。この固定型２の上面には、水平ア
ーム８ａを有する架台８が立設されている。そして、そ
の水平アーム８ａの下面には、油圧あるいは空気圧等に
よって作動されるスライド用シリンダ９が取り付けられ
ている。このシリンダ９のピストンロッド９ａは、スラ
イド型３の上面に連結されている。こうして、スライド
型３は、固定型２の面に密着した状態を保ちながら、シ
リンダ９が最も伸長した下方位置と、シリンダ９が最も
収縮したｌ三方位置との間で、上下にスライドされるよ
うになっている。As is clear from FIG. 1, this molding die 1 is composed of a fixed die 2, a slide die 3, and a movable die 4. The fixed mold 2 is fixed to a fixed platen 7 that is integrated with a bed 6 of an injection molding machine 5. A pedestal 8 having a horizontal arm 8a is erected on the upper surface of the fixed mold 2. A sliding cylinder 9 operated by hydraulic pressure, pneumatic pressure, or the like is attached to the lower surface of the horizontal arm 8a. A piston rod 9a of this cylinder 9 is connected to the upper surface of the slide mold 3. In this way, the slide mold 3 is slid up and down between the lower position where the cylinder 9 is most extended and the 3-way position where the cylinder 9 is most contracted, while remaining in close contact with the surface of the fixed mold 2. It has become.

可動型４は、射出成形機５のベッド６１−に水平移動自
在に支持された可動ｌ１ｌｌＯに取り付けられている。The movable mold 4 is attached to a movable l1llO supported horizontally movably on the bed 61- of the injection molding machine 5.

この可動＠１０は、図示されていない型開閉装置によっ
て、固定盤７に対して前後移動されるようになっている
。こうして、可動型４は、スライド型３に密着する型合
わせ位置と、スライド型３から離隔した型開き位置との
間で、前後に移動されるようになっている。This movable @10 is moved back and forth with respect to the fixed platen 7 by a mold opening/closing device (not shown). In this way, the movable mold 4 is moved back and forth between the mold matching position where it is in close contact with the slide mold 3 and the mold opening position where it is separated from the slide mold 3.

固定型２には、その中心に、固定盤７に取り付けられた
射出機１１から射Ｉｌｌされる溶融樹脂を導くスプルー
１２が設けられている。そして、スライド型３には、そ
れが下方位置にあるときにそのスプルー１２と連続する
中央のサブスプルー１３と、上方位置に移動したときに
そのスプルー１２と連続する下方のサブスプルー１４と
が設けられている。The fixed mold 2 is provided at its center with a sprue 12 that guides molten resin injected from an injection machine 11 attached to a fixed platen 7. The slide mold 3 is provided with a central sub-sprue 13 that is continuous with the sprue 12 when it is in the downward position, and a lower sub-sprue 14 that is continuous with the sprue 12 when it is moved to the upward position. There is.

また、スライド型３の型合わせ面には、中央のサブスプ
ルー１３のｈ下の対称位置に、雄型１５と雌型１６とが
設けられている。この雄型１５は、目標とする中空成形
品を二つ割りした分割体の一方の内面側を成形するもの
であり、雌型１６は、その他方の分割体の外面側を成形
するものである。一方、可動型４の型合わせ面には、ス
ライド型３が下方位置にあるときにその雄型１５及び雌
型１６にそれぞれ対向する雌型１７及び雄型１８が設け
られている。この雌型１７は一方の分割体の外面側を成
形するものであり１ＭＷ型１８は他方の分割体の内面側
を成形するものである。そして、この可動型４側の雌型
１７は、スライド型３が−Ｌ方位置にあるときには、ス
ライド型３側の雌型１６に対向するようにされている。Further, on the mold matching surface of the slide mold 3, a male mold 15 and a female mold 16 are provided at symmetrical positions below h of the central sub-sprue 13. The male mold 15 is for molding the inner surface of one of the two divided bodies of the target hollow molded product, and the female mold 16 is for molding the outer surface of the other divided body. On the other hand, on the mold matching surface of the movable mold 4, a female mold 17 and a male mold 18 are provided which respectively oppose the male mold 15 and female mold 16 when the slide mold 3 is in the lower position. The female mold 17 is for molding the outer surface of one of the divided bodies, and the 1MW mold 18 is for molding the inner surface of the other divided body. The female die 17 on the movable die 4 side faces the female die 16 on the slide die 3 side when the slide die 3 is in the -L direction position.

こうして、スライド型３が下方位置にあり、可動型４が
これに型合わせされているときには、そのスライド型３
とｉ■動型４との間に、老雄型１５，１８と各雌型１７
，１６とによってそれぞれ囲まれる　一対のキャビティ
１９．２０が形成されるようになっている。このとき、
各雌型１７，１６の端縁部には、すなわちこれらキャビ
ティ１９．２０には、可動型４に形成されたランチ２１
及びゲート２２．２３を通して、スライド４Ｉ！３の中
央のサブスプルー１３が連通ずるようになっている。ま
た、スライド型３が−１一方位置にあり、可動型４がこ
れに型合わせされているときには、そのスライド型３及
び可動型４の各雌型１６，１７が！ｆいに突き合わされ
、その雌型１６，１７の端縁部に、ｉｉ（動型４のラン
ナ２１及びゲート２２を通して、下方のサブスプルー１
４が連通ずるようにされている。In this way, when the slide mold 3 is in the lower position and the movable mold 4 is aligned with it, the slide mold 3
and i ■ dynamic type 4, old male type 15, 18 and each female type 17
, 16, respectively, are formed. At this time,
At the edge of each female mold 17, 16, i.e. in these cavities 19, 20, there is a launch 21 formed in the movable mold 4.
and through gate 22.23, slide 4I! The sub-sprue 13 at the center of 3 is in communication with each other. Further, when the slide mold 3 is in the -1 position and the movable mold 4 is matched with it, the female molds 16 and 17 of the slide mold 3 and the movable mold 4 are ! ii (through the runner 21 and gate 22 of the moving die 4, and the lower sub-sprue 1
4 are connected.

各雄型１５．１８の周縁部には、各雌型１７゜１６の周
端縁部にはめ合わされる小さな突起２４．２５が設けら
れている。The periphery of each male mold 15.18 is provided with a small projection 24.25 which fits into the peripheral edge of each female mold 17.16.

このような金型ｌを用いて中空成形品を成形するときに
は、まず、シリンダ９を伸長させてスライド型３を下方
位置に位置させる。そして、射出成形機５の可動盤ＩＯ
を固定盤７側に移動させて、スライド型３に可動型４を
型合わせする。この状態では、第１図に示されているよ
うに、スライド型３の中央のサブスプルーイド型３と可
動型４との間には一対のキャビティ１９．２０が形成さ
れ６゜ そこで、固定ａ１７に取り付けられた射出機１１から溶
融樹脂を射出する。すると、この溶融樹脂は、固定型２
のスプルー１２及びスライド型３の中央のサブスプルー
１３を通って、ランナ２１及びゲー）２２，２３から両
方のキャビティ１９．２０に導かれ、第２図に示されて
いるようにそのキャビティ１９．２０内に充填される。When molding a hollow molded product using such a mold l, first, the cylinder 9 is extended and the slide mold 3 is positioned at a lower position. Then, the movable platen IO of the injection molding machine 5
is moved to the fixed platen 7 side, and the movable mold 4 is aligned with the slide mold 3. In this state, as shown in FIG. 1, a pair of cavities 19 and 20 are formed between the sub-spruid mold 3 at the center of the slide mold 3 and the movable mold 4, and the fixed a17 Molten resin is injected from an injection machine 11 attached to the. Then, this molten resin is transferred to the fixed mold 2.
through the sprue 12 and the central sub-sprue 13 of the slide mold 3 from the runner 21 and the gates 22, 23 into both cavities 19.20 as shown in FIG. filled inside.

こうして、各キャビティ１９．２０において、中空成形
品の二つ割り分割体３１゜３２がそれぞれ成形される。In this way, two halves 31 and 32 of the hollow molded product are molded in each cavity 19, 20, respectively.

分割体３１．３２の冷却固化後、型開閉装置によって、
第３図に示されているように可動型４をスライド型！３
から離隔させる。すると、各雄型１５，１８がその分割
体３１．３２から離脱し、各分割体３１．３２はそれぞ
れ雌型！７゜１６側に残る。この型開き時、金型ｌのス
プルー１２、サブスプルー１３及びランチ２１内等で固
化した樹脂スプルーランナ部３３は、金型ｌから突き出
され、そのゲー）２２．２３に対応する部分で分離され
て落ドする。このようにして得られた分割体３１．３２
は、・その各端面が、互いに突き合わＸれる突き合わせ
面３１ａ、３２ａとなる。そして、その突き合わせ面３
１ａ、３２ａの周縁には、雄型１５゜１８の突起２４．
２５によって溝３１ｂ、３２ｂが成形されている。After cooling and solidifying the divided bodies 31 and 32, the mold opening/closing device
As shown in Figure 3, move the movable mold 4 to the sliding mold! 3
separate from Then, each male type 15, 18 separates from its divided body 31.32, and each divided body 31.32 becomes a female type! It remains on the 7°16 side. When the mold is opened, the resin sprue runner portion 33 that has solidified inside the sprue 12, sub-sprue 13, and launch 21 of the mold l is projected from the mold l and separated at the portion corresponding to the game) 22 and 23. fall. Divided bodies 31.32 obtained in this way
The respective end faces become abutting surfaces 31a and 32a that abut each other. And the butting surface 3
1a, 32a have male 15°18 protrusions 24.
25 to form grooves 31b and 32b.

次いで、第４図に示されているように、シリンダ９を収
縮させ、スライド型３を−１一方位置に移動させる。す
ると、スライド型３の雌型１６と可動型４の雌型１７と
が対向し、その雌型１６．１７に残ｙれた各分割体３２
．３１が互いに対向する状態となる。そして、このとき
には、スライド型３の下方のサブスプルー１４が固定型
２のスプルー１２に連続するようになる。Next, as shown in FIG. 4, the cylinder 9 is contracted and the slide die 3 is moved to the -1 position. Then, the female mold 16 of the slide mold 3 and the female mold 17 of the movable mold 4 face each other, and each of the divided bodies 32 remaining in the female mold 16 and 17
．． 31 are in a state where they face each other. At this time, the sub-sprue 14 below the slide mold 3 comes to be continuous with the sprue 12 of the fixed mold 2.

そこで、この状態で可動型４をスライド型３側に移動さ
せ、第５図に示されているようにこれらを型合わせする
。すると、各分割体３１゜３２の突き合わせ面３１ａ、
３２ａが互いに突き合わされる。そして、その突き合わ
せ部の周囲には、溝３１ｂ、３２ｂによる空間が形成さ
れる。この空間は、ゲート２２及びランナ２１を介して
サブスプルー１４に連通している。Therefore, in this state, the movable mold 4 is moved to the slide mold 3 side, and the molds are aligned as shown in FIG. Then, the abutting surfaces 31a of each divided body 31°32,
32a are butted against each other. A space is formed around the abutting portion by the grooves 31b and 32b. This space communicates with the sub-sprue 14 via the gate 22 and runner 21.

したがって、この状態で射出機１１から溶融樹脂を射出
すると、その溶融樹脂は、固定型２のスプルー１２．　
スライド型３の下方のサブスプルー１４、ランナ２１及
びゲート２２を通して、第６図に示されているように、
各分割体３１．３２の突き合わせ周縁部に充填される。Therefore, when molten resin is injected from the injection machine 11 in this state, the molten resin is transferred to the sprue 12 of the fixed mold 2.
Through the sub-sprue 14, runner 21 and gate 22 below the slide mold 3, as shown in FIG.
The abutted peripheral edges of each segment 31, 32 are filled.

そして、その周縁部樹脂３４によって、各分割体３１，
３２がＩ！−いに溶着される。Then, each divided body 31,
32 is I! - It is welded to the surface.

周縁部樹脂３４の冷却固化後、第７図に示されているよ
うに、再び型開閉装置によってスライド型３と可動型４
との型開きをする。そして、各分割体３１．３２が突き
合わせ溶着され、一つの完全蜜月成形品として完成され
た中空成形品３０を金型１から舛して取り出す。このと
き、金型ｌのスプルー１２、サブスプルー１４及びラン
チ２１内等で固化した樹脂スプルーランナ部３５は、そ
のゲー）２２．２３に対応する部分から分離される。After the peripheral resin 34 is cooled and solidified, as shown in FIG.
Open the mold with. Then, the divided bodies 31 and 32 are butt-welded and the hollow molded product 30, which is completed as one complete honeymoon molded product, is unrolled and taken out from the mold 1. At this time, the resin sprue runner portion 35 solidified within the sprue 12, sub-sprue 14, launch 21, etc. of the mold l is separated from the portion corresponding to the game 22, 23.

このようにして、中空成形品３０を取り外した後、第８
図に４（されているように、再びシリンダ９を伸長さけ
、スライド型３を下方位置に位置させる。そして、＋１
ｒｖＪ型４をスライド型３に型合わせする。すると、再
び第１図の状態に戻る。こうして、次の成形品の成形工
程へと移行する。In this way, after removing the hollow molded product 30, the eighth
4 (as shown in the figure), extend the cylinder 9 again and position the slide mold 3 in the lower position. Then, +1
Align rvJ mold 4 with slide mold 3. Then, the state returns to the state shown in FIG. 1 again. In this way, the process moves on to the next molding process.

このような−１ｄｉの成形工程を繰り返すことにより、
中空成形品３０は連続的に成形されるようになる。しか
も、その成形工程は、スライド型３の上下スライド、可
動型４の前後移動による型合わせ及び型開き、溶融樹脂
の射出、という単純な工程によって構成されるので、そ
の余工程の自動化も容易に行うことができる。したがっ
て、中空成形品３０の献産化が可能となる。By repeating this -1di molding process,
The hollow molded product 30 is continuously molded. Moreover, since the molding process consists of the simple steps of sliding the slide mold 3 up and down, moving the movable mold 4 back and forth to align and open the mold, and injecting the molten resin, the remaining steps can be easily automated. It can be carried out. Therefore, the hollow molded product 30 can be made into a gift.

そして、二つ割りの分割体３１．３２をそれぞれ射出成
形し、それを突き合わせ溶着するようにするものである
ので、成形品３０の肉厚や形状の自由度は大きく、完全
密封されたものであっても成形することができる。また
、ばりの除去作業もほとんど不要となる。しかも、その
分割体３１．３２の溶着は、その成形用の金型ｌ及び射
出機１１を用いて行われるので、その工程が簡素化され
るとともに、十分な溶着強度を得ることができる。Since the two divided bodies 31 and 32 are injection molded and butt welded together, the molded product 30 has a large degree of freedom in thickness and shape, and is completely sealed. can also be molded. Furthermore, burr removal work is almost unnecessary. Moreover, since the welding of the divided bodies 31 and 32 is performed using the mold l and the injection machine 11, the process is simplified and sufficient welding strength can be obtained.

なお、−ｈ記実施例においては、スライド型３と可動型
４とによって一対のキャビティ１９゜２０が形成され、
それによって１（ｌｌの中空成形品３０が？！）られる
ものとしているが、このキャビティ１９．２０が多数対
形成され、それによって同時に多数の中空成形品３０が
得られるようにすることもできる。In the embodiment -h, a pair of cavities 19 and 20 are formed by the slide mold 3 and the movable mold 4,
Although it is assumed that one (ll of hollow molded products 30!) is thereby obtained, it is also possible to form a large number of pairs of cavities 19, 20 so that a large number of hollow molded products 30 can be obtained at the same time.

また、上記実施例においては、スライド型３が固定型２
に沿って上下にスライドされるものとしているが、各雄
型１５，１Ｂを分離あるいは後退させ得るようにしてお
けば、そのスライド型３を、中央のサブスプルー１３を
中心として固定型２に沿って回転スライドするものとす
ることも可能となる。そのようにすれば、スライド型３
に設けられるサブスプルーは、その中央のもののみでよ
いことになる。Further, in the above embodiment, the sliding mold 3 is the fixed mold 2.
However, if each male mold 15, 1B can be separated or moved back, the sliding mold 3 can be slid along the fixed mold 2 around the central sub-sprue 13. It is also possible to make it rotate and slide. If you do that, slide type 3
The only sub-sprue to be provided is the one in the center.

（発明の効果） 以上の説明から明らかなように、本発明によれば、一組
の金型により、中空成形品を二つ割りした分割体を同時
に射出成形した後、その一方の金型をスライドさせて各
分割体をＩＩ″いに対向させ、次いで、型合わせしてそ
の分割体を突き合わせ、その突き合わせ面周縁に溶融樹
脂を射出することにより各分割体を溶着するようにして
いるので、金型の移動と溶融樹脂の射出とによって一連
の成形工程がすべて行われるようになり、その工程が容
易に自動化されるようになる。したがって、中空成形品
が容易に、しかも安価なシステムによって量産されるよ
うになる。また、各分割体が射出成形によって成形され
るので、複雑な形状の中空成形品や完全密封された中空
成形品、あるいは厚肉の中空成形品や部分的に肉厚の異
なる中空成形品等、種々の中空成形品を得ることができ
る。(Effects of the Invention) As is clear from the above description, according to the present invention, after simultaneously injection molding two halves of a hollow molded product using a set of molds, one of the molds is slid. The two divided bodies are made to face each other in a two-dimensional manner, and then the two divided bodies are butted against each other by matching the molds, and each divided body is welded by injecting molten resin onto the periphery of the abutted surfaces. The entire series of molding processes is now performed by moving the mold and injecting the molten resin, and the process can be easily automated.Thus, hollow molded products can be easily mass-produced using a low-cost system. In addition, since each segment is molded by injection molding, it is possible to create hollow molded products with complex shapes, completely sealed hollow molded products, thick-walled hollow molded products, or hollow molded products with partially different wall thicknesses. Various hollow molded products such as molded products can be obtained.

そして、その金型を、単一のスプルーを有する固定型と
、その固定型に沿って二位置間で移動されるスライド型
と、そのスライド型に型合わせされる可動型とにより構
成し、そのスライド型に、その二位置において固定型の
スプルーに連続するサブスプルーを設けるようにしてい
るので、各分割体の成形時及びその分割体の溶着時の溶
融樹脂の射出は、１台の射出機によって行うことができ
るようになる。また、スライド型及び可動型に設けられ
る雄型に、各分割体の突き合わせ面周縁に溝を成形する
突起を設けるようにしているので、各分割体を突き合わ
せたとき、その周縁部に、溶着用の樹脂が充填ｙれる空
間が形成されるようになり、その溶着が確実になされる
ようになるとともに、ばりが形成されることも少なくな
る。The mold is composed of a fixed mold having a single sprue, a sliding mold that is moved between two positions along the fixed mold, and a movable mold that is matched to the sliding mold. Since the slide mold is provided with sub-sprues that are continuous with the fixed sprue at two positions, the injection of molten resin during molding of each divided body and welding of the divided bodies is performed by one injection machine. be able to do it. In addition, the male die provided on the slide mold and the movable mold is provided with a protrusion that forms a groove on the periphery of the abutting surfaces of each divided body, so when the divided bodies are butted together, there is a welding area on the periphery. This creates a space in which the resin can be filled, ensuring reliable welding and reducing the occurrence of burrs.

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

第１図は、本発明による中空成形品の成形用金型の一実
施例を、射出成形機の要部とともに示す縦断側面図、 第２〜８図は、本発明による中空成形品の成形方法を説
明するためのもので、その各成形工程における金型及び
樹脂の状態を示す縦断側面図である。　　。 ！・・・金型　　　　　　　　２・・・固定型３・・・
スライド型　　　　　４・・・可動型５・・・射出成形
機 ９・・・スライド用シリンダ １１・・・射出機　　　　　　１２・・・スプルー１３
．１４・・・サブスプルー １５・・・雄型　　　　　　　１６，１７・・・雌型１
８・・・雄型 １９．２０・・・キャビティ ２４．２５・・・突起　　　　３０・・・中空成形品３
１．３２・・・分割体 ３１ａ、３２ａ・・・突き合わせ面 ３１ｂ、３２ｂ・・・溝 ３４・・・周縁部樹脂 特許出願人　株式会社日本製鋼所 代　理　人　　弁理士　森　下　端　侑第１図 第２図 第７図 第８図FIG. 1 is a longitudinal sectional side view showing an embodiment of a mold for forming a blow molded product according to the present invention together with the main parts of an injection molding machine. FIGS. 2 to 8 are a method for molding a blow molded product according to the present invention. FIG. 2 is a vertical cross-sectional side view showing the state of the mold and resin in each molding process. . ! ...Mold 2...Fixed mold 3...
Slide mold 4... Movable mold 5... Injection molding machine 9... Slide cylinder 11... Injection machine 12... Sprue 13
．． 14...Sub sprue 15...Male type 16,17...Female type 1
8... Male mold 19.20... Cavity 24.25... Protrusion 30... Hollow molded product 3
1.32...Divided bodies 31a, 32a...Abutting surfaces 31b, 32b...Groove 34...Peripheral resin Patent applicant Japan Steel Works Co., Ltd. Representative Patent attorney Yu Mori Shimohagi Figure 1 Figure 2 Figure 7 Figure 8

Claims (2)

【特許請求の範囲】[Claims] （１）一方の金型３に、中空成形品３０を二つ割りした
分割体３１、３２をそれぞれ成形する雄型１５と雌型１
６とが設けられ、他方の金型４に、それら雄型１５及び
雌型１６にそれぞれ対向する雌型１７と雄型１８とが設
けられた、一組の金型１を用い、 それら互いに対向する雄型１５、１８と雌型１７、１６
との間に形成される一対のキャビティ１９、２０内に溶
融樹脂を注入して、各分割体３１、３２を成形し、 次いで、一方の金型３をスライドさせて、各雌型１７、
１６に残された各分割体３１、３２を互いに対向させ、 各金型３、４を型合わせすることにより、これら各分割
体３１、３２を互いに突き合わせた後、 その突き合わせ面３１ａ、３２ａの周縁に溶融樹脂を射
出して、各分割体３１、３２を互いに溶着するようにし
た、 中空成形品の成形方法。(1) A male mold 15 and a female mold 1 for molding divided bodies 31 and 32, which are obtained by dividing a hollow molded product 30 into two, into one mold 3, respectively.
A set of molds 1 is used, in which the other mold 4 is provided with a female mold 17 and a male mold 18, which are opposite to the male mold 15 and female mold 16, respectively. Male types 15, 18 and female types 17, 16
Molten resin is injected into the pair of cavities 19, 20 formed between the two to form each divided body 31, 32, and then one of the molds 3 is slid to form each female mold 17,
After the divided bodies 31 and 32 left in 16 are made to face each other and the molds 3 and 4 are matched, the divided bodies 31 and 32 are abutted against each other, and then the peripheral edges of the abutted surfaces 31a and 32a are A method for forming a hollow molded product, in which each divided body 31, 32 is welded to each other by injecting molten resin. （２）単一のスプルー１２を有する固定型２と、その固
定型２に沿って二位置間で移動されるスライド型３と、 そのスライド型３に型合わせされる可動型４と、 からなり、 前記スライド型３には、中空成形品３０を二つ割りした
分割体３１、３２をそれぞれ成形する雄型１５と雌型１
６とが設けられているとともに、前記二位置において前
記固定型２のスプルー１２に連続するサブスプルー１３
、１４が設けられており、 前記可動型４には、前記スライド型３が一方の位置にあ
るときにその雄型１５及び雌型１６にそれぞれ対向する
雌型１７と雄型１８とが設けられ、その雌型１７が、前
記スライド型３が他方の位置に移動したときにそのスラ
イド型３の雌型１６に対向するようにされており、 前記サブスプルー１３、１４が、前記固定型２のスプル
ー１２に連続した状態にあるときに、これら雌型１６、
１７の端縁部に連通するようにされているとともに、 前記各雄型１５、１８に、前記分割体３１、３２の各突
き合わせ面３１ａ、３２ａ周縁に溝３１ｂ、３２ｂを成
形する突起２４、２５が設けられている、 中空成形品の成形用金型。(2) Consisting of a fixed mold 2 having a single sprue 12, a sliding mold 3 that is moved between two positions along the fixed mold 2, and a movable mold 4 that is matched to the sliding mold 3. , The slide mold 3 includes a male mold 15 and a female mold 1 for respectively molding divided bodies 31 and 32 which are obtained by dividing the hollow molded product 30 into two.
6, and a sub-sprue 13 continuous to the sprue 12 of the fixed mold 2 at the two positions.
, 14 are provided, and the movable mold 4 is provided with a female mold 17 and a male mold 18 that respectively oppose the male mold 15 and female mold 16 when the slide mold 3 is in one position. , the female mold 17 is arranged to face the female mold 16 of the slide mold 3 when the slide mold 3 moves to the other position, and the sub sprues 13 and 14 are arranged to face the sprue of the fixed mold 2. 12, these female molds 16,
Protrusions 24 and 25 are configured to communicate with the end edges of the respective male molds 15 and 18, and form grooves 31b and 32b on the peripheries of the abutting surfaces 31a and 32a of the divided bodies 31 and 32, respectively. A mold for forming hollow molded products.
JP60227761A 1985-10-15 1985-10-15 Molding of hollow molded part and mold used therefor Granted JPS6287315A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP60227761A JPS6287315A (en) 1985-10-15 1985-10-15 Molding of hollow molded part and mold used therefor

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP60227761A JPS6287315A (en) 1985-10-15 1985-10-15 Molding of hollow molded part and mold used therefor

Publications (2)

Publication Number Publication Date
JPS6287315A true JPS6287315A (en) 1987-04-21
JPH0238377B2 JPH0238377B2 (en) 1990-08-30

Family

ID=16865960

Family Applications (1)

Application Number Title Priority Date Filing Date
JP60227761A Granted JPS6287315A (en) 1985-10-15 1985-10-15 Molding of hollow molded part and mold used therefor

Country Status (1)

Country Link
JP (1) JPS6287315A (en)

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JPH05278139A (en) * 1992-02-05 1993-10-26 Idemitsu Petrochem Co Ltd Container and production thereof
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JPH07217755A (en) * 1990-12-28 1995-08-15 Japan Steel Works Ltd:The Method of manufacturing hollow assembly
EP0683031A3 (en) * 1994-05-21 1996-09-11 Siegfried Hofmann Gmbh Werkzeu Method for manufacturing multi-part injection moulded objects and device for carrying out the method.
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