JPH0763988B2 - Joint structure of hollow synthetic resin - Google Patents
Joint structure of hollow synthetic resinInfo
- Publication number
- JPH0763988B2 JPH0763988B2 JP1297191A JP1297191A JPH0763988B2 JP H0763988 B2 JPH0763988 B2 JP H0763988B2 JP 1297191 A JP1297191 A JP 1297191A JP 1297191 A JP1297191 A JP 1297191A JP H0763988 B2 JPH0763988 B2 JP H0763988B2
- Authority
- JP
- Japan
- Prior art keywords
- recess
- die
- cutting direction
- joining
- molten resin
- 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.)
- Expired - Lifetime
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
- B29C45/14—Injection moulding, i.e. forcing the required volume of moulding material through a nozzle into a closed mould; Apparatus therefor incorporating preformed parts or layers, e.g. injection moulding around inserts or for coating articles
- B29C45/14467—Joining articles or parts of a single article
-
- 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
- B29C45/14—Injection moulding, i.e. forcing the required volume of moulding material through a nozzle into a closed mould; Apparatus therefor incorporating preformed parts or layers, e.g. injection moulding around inserts or for coating articles
- B29C45/14467—Joining articles or parts of a single article
- B29C2045/14524—Joining articles or parts of a single article making hollow articles
-
- 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)
- Injection Moulding Of Plastics Or The Like (AREA)
- Lining Or Joining Of Plastics Or The Like (AREA)
Description
【０００１】[0001]
【産業上の利用分野】本発明は射出成形された半割体を
衝合接合させて中空体を製造する場合の接合部の接合構
造に関するものである。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a joining structure of a joining portion in the case where a hollow body is manufactured by abutting and joining an injection-molded half body.
【０００２】[0002]
【従来の技術】中空容器を製造する方法としてはブロー
成形が一般的ではあるが、中空体の構造強度または形状
との関係で、分割した半割体を１次射出成形し、その半
割体を衝合してその突き合わせ部に樹脂を２次射出成形
して接合する２段成形方法が提案されている（特公平２
−２０４１０号）。しかしながら、中空体全体が大形と
なり、突き合わせ部に一定以上の接合強度が必要とされ
る場合は突き合わせ部に接合用の溶融樹脂を射出成形す
るだけでは十分でないという問題点がある。Blow molding is generally used as a method for manufacturing a hollow container. However, in consideration of the structural strength or shape of the hollow body, the divided half body is subjected to primary injection molding, and the half body is then injected. A two-step molding method has been proposed in which a resin is abutted against each other and a resin is secondarily injection-molded at the abutting portion (Patent Publication 2).
-20410). However, when the entire hollow body is large and the joints need to have a certain level of joint strength, there is a problem in that it is not sufficient to injection-mold a molten resin for joining the joints.
【０００３】[0003]
【発明が解決しようとする課題】ところで、半割体を衝
合して中空体を製造しようとする場合、中空体の接合部
に一定の接合強度を与えるには接合面の水平な方向（左
右巾方向）と垂直な方向（上下高さ方向）とにおいて両
方の接合面が係合するのが必要がある。そこで、本発明
は、半割体の接合面において上下左右に溶融樹脂を介し
て物理的に結合することのできる接合構造を提供するこ
とを課題とする。By the way, in the case of manufacturing a hollow body by abutting half-split bodies, in order to give a certain joint strength to the joint portion of the hollow bodies, the horizontal direction (left and right) of the joint surface is required. It is necessary that both joint surfaces be engaged in the width direction) and the vertical direction (vertical height direction). Therefore, it is an object of the present invention to provide a joining structure capable of being physically joined in the vertical and horizontal directions on a joining surface of a half-divided body through a molten resin.
【０００４】[0004]
【課題を解決するための手段】本発明は型抜き方向と直
交する方向においては、型にスライド構造を付設して型
抜き方向と直交する方向に係合部を形成すれば、型抜き
方向の係合部と相俟って上記物理的係合を達成すること
ができることに着目してなされたもので、射出成形され
た半割体をそれぞれ型内にてその端面を互いに衝合して
衝合部に接合用の溶融樹脂材料を注入して接合する構造
において、各半割体の端面に型抜き方向のくぼみとこれ
と直交する方向のくぼみとを設け、これらくぼみで組み
合わされて形成される空間に上記溶融樹脂が注入される
ように形成されたことを要旨とする合成樹脂製中空体の
接合構造にある。本発明において、型抜き方向のくぼみ
は半割体の接合端面全長にわたって形成することが容易
であるから、長手方向に連続的に設け、他方、これと直
交方向のくぼみはスライド構造を付設することが必要で
あるから、断続的に設けるのが型設計上容易である。こ
こで、くぼみとは溶融樹脂が収容されて接合力を発揮す
ることができる凹所をいうが、穴または貫通穴で形成さ
れてもよい。According to the present invention, in the direction orthogonal to the die cutting direction, if a slide structure is attached to the die and an engaging portion is formed in the direction orthogonal to the die cutting direction, the die cutting direction It was made paying attention to the fact that the above-mentioned physical engagement can be achieved in cooperation with the engaging portion, and the injection-molded halves are abutted against each other at their end faces in the mold. In a structure in which a molten resin material for joining is injected into the joining portion and joined, a recess in the die cutting direction and a recess in the direction orthogonal to this are provided on the end surface of each half body, and they are formed by combining these recesses. It is a joint structure of synthetic resin hollow bodies, which is characterized in that it is formed so that the molten resin is injected into the space. In the present invention, since the depression in the die cutting direction can be easily formed over the entire joint end face of the half-split body, it is provided continuously in the longitudinal direction, while the depression in the orthogonal direction is provided with a slide structure. Therefore, it is easy to provide the mold intermittently in terms of mold design. Here, the dent means a recess in which a molten resin is accommodated and can exert a bonding force, but it may be formed as a hole or a through hole.
【０００５】[0005]
【作用】本発明によれば、衝合端面は各半割体の型抜き
方向に形成したくぼみに注入される溶融樹脂により連結
されてその水平方向の物理的係合が図れる一方、各半割
体の型抜き方向に直交するくぼみに注入される溶融樹脂
により連結されて垂直方向の物理的係合が図れることに
なる。According to the present invention, the abutting end faces are connected by the molten resin injected into the recess formed in the die-cutting direction of each half body so as to achieve the physical engagement in the horizontal direction, while the half divisions are made. It is connected by the molten resin injected into the recess orthogonal to the die-cutting direction of the body, and the physical engagement in the vertical direction can be achieved.
【０００６】[0006]
【実施例】以下、本発明を添付図面に示す具体例に基づ
き、詳細に説明することにする。図１は本発明の接合構
造の成形状態を示す断面図で、中空体の各半割体を１次
成形した後の２次成形のための型締め前の状態を示す。
図２はその要部拡大斜視図、図３は２次成形のための型
締め後、本発明の接合構造に溶融樹脂を注入した状態を
示す断面図で、図４はその要部拡大斜視図である。DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be described below in detail with reference to specific examples shown in the accompanying drawings. FIG. 1 is a cross-sectional view showing a molding state of the joint structure of the present invention, showing a state before mold clamping for secondary molding after primary molding of each half body of the hollow body.
2 is an enlarged perspective view of an essential part thereof, FIG. 3 is a sectional view showing a state where molten resin is injected into the joint structure of the present invention after mold clamping for secondary molding, and FIG. 4 is an enlarged perspective view of the essential part. Is.
【０００７】図面において、１は上型、２は下型で、各
々には中空体の半割体３および４が成形されている。そ
の半割体３は衝合端面３０の周縁部にやや上がった位置
から外方にフランジ部３１、３２を突設し、型抜き方向
のくぼみ３３を形成する一方、そのフランジ面に沿って
進退するスライドコア１１、１２を上型１の型合わせ面
に付設して半割体１の射出成形時に、衝合端面３０の外
側から上記くぼみ３３に連続する、即ち型抜き方向に直
交するくぼみ３４を形成する。他方、半割体４も本体部
の衝合端面４０の周縁部にはやや下がった位置で外方に
フランジ部４１、４２を突設し、型抜き方向のくぼみ４
３を形成する一方、そのフランジ面に沿って進退するス
ライドコア２１、２２を下型２の型合わせ面に付設して
半割体２の射出成形時に、衝合端面４０の外側から上記
くぼみ４３に連続する、即ち型抜き方向に直交するくぼ
み４４を形成する。In the drawings, 1 is an upper mold, 2 is a lower mold, and hollow halves 3 and 4 are formed in each. The half-split body 3 has flange portions 31 and 32 projecting outward from a slightly elevated position on the peripheral edge of the abutting end face 30 to form a recess 33 in the die-cutting direction, while advancing and retracting along the flange face. When the slide cores 11 and 12 are attached to the mold matching surface of the upper mold 1 and the half-split body 1 is injection-molded, the recess 34 is continuous from the outer side of the abutting end face 30 with the recess 33, that is, the recess 34 orthogonal to the mold cutting direction. To form. On the other hand, the half-split body 4 also has flange portions 41, 42 projecting outward at a slightly lowered position on the peripheral edge portion of the abutting end surface 40 of the main body portion to form a recess 4 in the die cutting direction.
3 is formed, the slide cores 21 and 22 that move forward and backward along the flange surface are attached to the mold matching surface of the lower mold 2 and, at the time of injection molding of the half-split body 2, from the outside of the abutting end surface 40, the recess 43 is formed. To form a recess 44 that is continuous with, i.e., orthogonal to, the die cutting direction.
【０００８】上記型抜き方向のくぼみ３３、４３は半割
体の周縁部に突設されるフランジ部３１（３２）、４１
（４２）の全長わたって形成されるのが溶融樹脂の二次
成形を容易にし、接合強度を向上させるには好ましい。
他方、この長手方向に延びるくぼみ３３、４３に直交す
るくぼみ３４、４４は適宜間隔で長手方向に沿って断続
的に形成されるのが接合強度を向上させるためには好ま
しい（第２図参照）。上記フランジ面上のくぼみ３３お
よび４３は半割体３および４の衝合状態では、図４に示
すように長手方向に連続し、他方型抜き方向に直交した
複数のくぼみ３４、４４は上記くぼみ３３および４３の
形成する空間から断続的に側方に突出する形態をとる。
したがって、その空所路Ｒ１に、スプールを介して溶融
樹脂Ｂを注入すると上記フランジ部３１、３２および４
１、４２はくぼみ３３および４３からくぼみ３４および
４４に至る溶融樹脂によって上下に物理的に連結され、
その上で溶融樹脂の接合力が半割体３および４の周縁部
接合端面に働くことになる。なお、上記実施例では型抜
き方向のくぼみ３３、４３が平坦であるが、さらにフラ
ンジ部３１、３２、４１、４２を貫通する穴を形成して
巾方向の物理的係合力を増強させてもよい。The recesses 33, 43 in the die-cutting direction are flange portions 31 (32), 41 projecting from the peripheral edge of the half body.
It is preferable that it is formed over the entire length of (42) to facilitate the secondary molding of the molten resin and improve the bonding strength.
On the other hand, the recesses 34 and 44 orthogonal to the recesses 33 and 43 extending in the longitudinal direction are preferably formed intermittently along the longitudinal direction at appropriate intervals in order to improve the bonding strength (see FIG. 2). . In the abutting state of the halves 3 and 4, the recesses 33 and 43 on the flange surface are continuous in the longitudinal direction as shown in FIG. 4, while the recesses 34 and 44 orthogonal to the die cutting direction are the recesses. It is in the form of protruding laterally intermittently from the space formed by 33 and 43.
Therefore, when the molten resin B is injected into the void R1 via the spool, the flange portions 31, 32 and 4 are
1, 42 are physically connected up and down by molten resin from the depressions 33 and 43 to the depressions 34 and 44,
Then, the joining force of the molten resin acts on the joining end faces of the peripheral portions of the half-split bodies 3 and 4. Although the depressions 33, 43 in the die-cutting direction are flat in the above-mentioned embodiment, holes that penetrate the flange portions 31, 32, 41, 42 may be further formed to enhance the physical engagement force in the width direction. Good.
【０００９】上記空所路Ｒ１は第５図に示すように、断
面円形中空体の半割体５および６のように端面が肉厚で
ある場合は第６図に示すように、直接その端面に型抜き
方向の凹部５１および６１を設けると同時にそれに直交
する方向に連続する凹部５２および６２を形成してもよ
い。この場合、接合端面５０、６０の一部は直接当接さ
せる部分を最も内側に形成する。また、第７図に示すよ
うに、型抜き方向のくぼみ５３ａとその両端において直
交する方向の一対のくぼみ５３ｂとからなる断面逆コ字
形のくぼみ５３をそれに相応する形状のスライドコアに
より半割体５、６にまたがるように形成してもよい。さ
らにまた、第８図に示すように、半割体５の接合端面５
０には型抜き方向に外側切り欠き凹部５４を形成する一
方、半割体６の接合端面６０には型抜き方向に内側切り
欠き凹部６４を形成し、両者の衝合状態で断面逆Ｌ字形
の空所Ｒ２を形成し、更に該空所Ｒ２を直交し、両者の
衝合端面５０、６０にまたがる貫通したくぼみ６５およ
び５５をスライドコアにより形成するようにしてもよ
い。また、第９図に示すように、半割体５の接合端面５
０の中央部には型抜き方向に凹部５６を形成する一方、
半割体６の接合端面６０の中央部には型抜き方向に凹部
６６を形成し、両者の衝合状態で連続する空所Ｒ３を形
成し、該空所Ｒ３を直交するくぼみ５７および６７をそ
れぞれ半割体５、６に対しスライドコアにより形成する
ようにしてもよい。要するに、型抜き方向のくぼみ又は
凹部あるいは穴とにより少なくとも型抜き方向において
物理的に係合する構造が溶融樹脂の注入により行われる
ようにするのが肝要である。As shown in FIG. 5, when the end face is thick like the half halves 5 and 6 having a circular hollow body as shown in FIG. 5, the vacant space R1 is directly connected to the end face as shown in FIG. It is also possible to provide the recesses 51 and 61 in the die-cutting direction and simultaneously form the recesses 52 and 62 which are continuous in the direction orthogonal thereto. In this case, a part of the joint end surfaces 50 and 60 is directly in contact with the innermost portion. Further, as shown in FIG. 7, a recess 53 having an inverted U-shaped cross section, which is composed of a recess 53a in the die-cutting direction and a pair of recesses 53b in the directions orthogonal to each other at both ends thereof, is formed by a slide core having a shape corresponding thereto. You may form so that it may straddle 5 and 6. Furthermore, as shown in FIG.
0 has an outer cutout recess 54 formed in the die-cutting direction, while an intermediate cutout recess 64 is formed in the joint end face 60 of the half-divided body 6 in the die-cutting direction. The hollow R2 may be formed, and the hollow R2 may be orthogonal to each other, and the recesses 65 and 55 penetrating both abutting end surfaces 50 and 60 may be formed by the slide core. Further, as shown in FIG. 9, the joint end surface 5 of the half-split body 5 is
While a recess 56 is formed in the center of 0 in the die cutting direction,
A recess 66 is formed in the center of the joining end surface 60 of the half-split body 6 in the die-cutting direction, and a continuous space R3 is formed in the abutting state of the two, and recesses 57 and 67 orthogonal to the space R3 are formed. Alternatively, the halves 5 and 6 may be formed of slide cores. In short, it is important that the structure that is physically engaged at least in the die-cutting direction by the recess or the recess or the hole in the die-cutting direction is formed by injecting the molten resin.
【００１０】[0010]
【発明の効果】以上の説明で明らかなように、本発明に
よれば、射出成形された半割体をそれぞれ型内にてその
端面を互いに衝合して衝合部に接合用の溶融樹脂材料を
注入して接合する構造において、各半割体の接合端面に
は型抜き方向だけでなく、それに直交する方向にくぼみ
を設けて型抜き方向に半割体を物理的に係合するように
したので、接合強度は溶融樹脂の接合力だけの場合より
飛躍的に向上させることができ、大型中空体を製造する
半割体の接合に適するものである。As is apparent from the above description, according to the present invention, a molten resin for joining injection-molded halves to their abutting portions by abutting their end faces against each other in a mold. In the structure in which the material is injected and joined, not only the die cutting direction but also the depression is provided in the joining end face of each half body so that the half body is physically engaged in the die cutting direction. Therefore, the joining strength can be dramatically improved as compared with the case where only the joining force of the molten resin is used, and the joining strength is suitable for joining the half-split bodies for producing a large hollow body.
【図１】 本発明の接合構造の成形状態を示す断面図、FIG. 1 is a cross-sectional view showing a molded state of a joint structure of the present invention,
【図２】 図１の要部拡大斜視図、FIG. 2 is an enlarged perspective view of a main part of FIG.
【図３】 本発明の接合構造に溶融樹脂を注入した状態
を示す断面図、FIG. 3 is a cross-sectional view showing a state where molten resin is injected into the joint structure of the present invention,
【図４】 図３の要部拡大斜視図、FIG. 4 is an enlarged perspective view of an essential part of FIG.
【図５】 本発明の接合構造をフランジのない円筒形中
空体の接合端面に適用した場合の全体を表す断面図、FIG. 5 is a cross-sectional view showing the entire case where the joining structure of the present invention is applied to the joining end surface of a cylindrical hollow body without a flange,
【図６】 図５の要部拡大断面図、FIG. 6 is an enlarged cross-sectional view of the main part of FIG.
【図７】 図５の中空体に適用した本発明の他の実施例
を示す図６相当の断面図、7 is a sectional view corresponding to FIG. 6, showing another embodiment of the present invention applied to the hollow body of FIG.
【図８】 本発明の接合構造の第２変形例の図６相当の
断面図、FIG. 8 is a sectional view of a second modified example of the joining structure according to the present invention, which corresponds to FIG.
【図９】 本発明の接合構造の第３変形例の図６相当の
断面図。FIG. 9 is a sectional view of a third modified example of the bonding structure of the present invention, which corresponds to FIG. 6.
１は上型、２は下型、３および４は中空体の半割体、 １１、１２、２１、２２はスライドコア、 ３０および４０は本体部、３１、３２はフランジ部、 ３３は貫通穴、４１、４２はフランジ部、４３は貫通
穴、 Ｒ１、Ｒ２およびＲ３は溶融樹脂が注入される空所路。1 is an upper mold, 2 is a lower mold, 3 and 4 are hollow halves, 11, 12, 21, 22 are slide cores, 30 and 40 are main parts, 31 and 32 are flange parts, and 33 is a through hole. , 41 and 42 are flanges, 43 is a through hole, and R1, R2 and R3 are voids into which molten resin is injected.
───────────────────────────────────────────────────── フロントページの続き (72)発明者 木山 尚志 広島県東広島市八本松町大字原175番地の １ 大協株式会社内 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Naoshi Kiyama 1 175, Ojiwara, Hachihonmatsucho, Higashihiroshima City, Hiroshima Prefecture Daikyo Corporation
Claims (2)
てその端面を互いに衝合して衝合部に接合用の溶融樹脂
材料を注入して接合する構造において、 各半割体の端面に型抜き方向のくぼみとこれと直交する
方向のくぼみとを設け、これらくぼみで組み合わされて
形成される空間に上記溶融樹脂が注入されるように形成
されたことを特徴とする合成樹脂製中空体の接合構造。1. A structure in which injection-molded halves are abutted against each other in their respective molds and a molten resin material for joining is injected into the abutting portions to join the halves. The end face is provided with a recess in the die cutting direction and a recess in a direction orthogonal thereto, and the molten resin is formed so as to be injected into the space formed by combining these recesses. Hollow body joint structure.
であり、これと直交方向のくぼみが断続的である請求項
１記載の合成樹脂製中空体の接合構造。2. The joint structure for synthetic resin hollow bodies according to claim 1, wherein the depressions in the die-cutting direction are continuous in the longitudinal direction, and the depressions in the direction orthogonal thereto are intermittent.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1297191A JPH0763988B2 (en) | 1991-01-09 | 1991-01-09 | Joint structure of hollow synthetic resin |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1297191A JPH0763988B2 (en) | 1991-01-09 | 1991-01-09 | Joint structure of hollow synthetic resin |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH04270613A JPH04270613A (en) | 1992-09-28 |
| JPH0763988B2 true JPH0763988B2 (en) | 1995-07-12 |
Family
ID=11820118
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP1297191A Expired - Lifetime JPH0763988B2 (en) | 1991-01-09 | 1991-01-09 | Joint structure of hollow synthetic resin |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0763988B2 (en) |
Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP3748506B2 (en) * | 1999-05-20 | 2006-02-22 | キヤノン株式会社 | Process cartridge and process cartridge assembly method |
| JP4437600B2 (en) * | 2000-07-31 | 2010-03-24 | 株式会社大嶋電機製作所 | Hollow molded body and method for producing the same |
| JP4136299B2 (en) * | 2000-09-12 | 2008-08-20 | キヤノン株式会社 | Parts assembly made of synthetic resin |
| KR102286567B1 (en) * | 2020-03-31 | 2021-08-06 | 엔피씨(주) | Eco-friendly buoy having stucture of double injection molding |
-
1991
- 1991-01-09 JP JP1297191A patent/JPH0763988B2/en not_active Expired - Lifetime
Also Published As
| Publication number | Publication date |
|---|---|
| JPH04270613A (en) | 1992-09-28 |
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