JPH04279318A - Joint structure of synthetic resin hollow body - Google Patents
Joint structure of synthetic resin hollow bodyInfo
- Publication number
- JPH04279318A JPH04279318A JP1297091A JP1297091A JPH04279318A JP H04279318 A JPH04279318 A JP H04279318A JP 1297091 A JP1297091 A JP 1297091A JP 1297091 A JP1297091 A JP 1297091A JP H04279318 A JPH04279318 A JP H04279318A
- Authority
- JP
- Japan
- Prior art keywords
- molten resin
- joint
- flange parts
- perforated holes
- holes
- 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
Links
- 229920003002 synthetic resin Polymers 0.000 title claims description 3
- 239000000057 synthetic resin Substances 0.000 title claims description 3
- 229920005989 resin Polymers 0.000 claims abstract description 18
- 239000011347 resin Substances 0.000 claims abstract description 18
- 238000005304 joining Methods 0.000 claims description 9
- 238000005520 cutting process Methods 0.000 claims description 6
- 239000000463 material Substances 0.000 claims description 3
- 230000000694 effects Effects 0.000 abstract description 5
- 230000002093 peripheral effect Effects 0.000 abstract description 3
- 238000000465 moulding Methods 0.000 description 5
- 238000001746 injection moulding Methods 0.000 description 3
- 238000004519 manufacturing process Methods 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 230000000149 penetrating effect Effects 0.000 description 2
- 238000004873 anchoring Methods 0.000 description 1
- 238000000071 blow moulding Methods 0.000 description 1
- 238000002347 injection Methods 0.000 description 1
- 239000007924 injection Substances 0.000 description 1
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)
Abstract
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 joint structure for a joint when a hollow body is manufactured by butt-joining injection-molded half bodies.
【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。[Prior Art] Blow molding is a common method for manufacturing hollow containers, but due to the structural strength or shape of the hollow body, primary injection molding is performed on the divided halves. A two-stage molding method has been proposed in which the butted parts are joined by secondary injection molding of resin (Patent Publication No. 2).
-20410). However, when the entire hollow body becomes large and the abutting portions require a certain level of bonding strength, there is a problem in that simply injection molding molten resin for bonding to the abutting portions is not sufficient.
【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と垂
直な方向とにおいて両方の接合面が係合するのが望まし
いが、垂直な方向での係合を行わせるためには型にスラ
イド構造を付設して型抜き方向とは直交する係合部を形
成し、型抜き時にスライドコアを退避する構造とする必
要があって、型構造を複雑にする問題点がある。そこで
、本発明はこのようなスライド構造を型に設けることな
く、接合強度大なる接合力を与える接合構造を提供する
ことを課題とする。[Problem to be Solved by the Invention] By the way, when trying to manufacture a hollow body by abutting halves, in order to give a constant joint strength to the joined part of the hollow body, it is necessary to It is desirable that both joint surfaces engage in the vertical direction, but in order to engage in the vertical direction, a sliding structure is attached to the mold to form an engaging part perpendicular to the mold-cutting direction. However, it is necessary to have a structure in which the slide core is retracted during die cutting, which poses the problem of complicating the die structure. Therefore, an object of the present invention is to provide a bonding structure that provides a high bonding force without providing such a slide structure in the mold.
【０００４】0004
【課題を解決するための手段】本発明は接合面に型抜き
方向の貫通穴を有するフランジ部を形成し、該貫通穴を
連結するように注入される溶融樹脂により垂直方向の係
合力を増大させ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、各半割体の衝合端面に
互いに一定の間隔をおいて対向するフランジ部をそれぞ
れ形成し、その両フランジ部には長手方向に断続的に型
抜き方向に貫通穴を形成し、各半割体の端面衝合状態で
両フランジ部の上記貫通穴により形成される蛇行状の空
所に上記溶融樹脂が注入されるように形成したことを要
旨とする合成樹脂製中空体の接合構造にある。[Means for Solving the Problems] The present invention forms a flange portion having a through hole in the die cutting direction on the joint surface, and increases vertical engagement force by molten resin injected to connect the through hole. The injection-molded halves are placed in a mold so that their end faces abut each other, and molten resin material for joining is injected into the abutting areas to join them. In the structure, flange portions facing each other at a constant interval are formed on the abutting end surfaces of each half body, and through holes are formed intermittently in the longitudinal direction in the die cutting direction in both flange portions, Joining of synthetic resin hollow bodies is formed such that the molten resin is injected into the meandering cavity formed by the through holes of both flanges when the end faces of each half body are in contact with each other. It's in the structure.
【０００５】[0005]
【作用】本発明によれば、衝合端面は長手方向に断続的
に型抜き方向の貫通穴を形成したフランジ部を設けるの
で、型にスライド構造を付設せずとも成形可能である。
しかもその対向するフランジ部の貫通穴は蛇行状の連続
する空所を形成するので、その空所に注入される溶融樹
脂は接合端面との接触面積が大きくなるだけでなく、貫
通穴から裏面にまわり、アンカー効果を発揮して強い接
合強度を持つことができることになる。（図７参照）。According to the present invention, since the abutting end faces are provided with flange portions in which through-holes in the mold removal direction are formed intermittently in the longitudinal direction, molding can be performed without attaching a slide structure to the mold. Moreover, since the through holes in the opposing flanges form a meandering continuous cavity, the molten resin injected into the cavity not only has a large contact area with the joint end surface, but also flows from the through hole to the back surface. This means that the anchor effect can be exerted and strong bonding strength can be achieved. (See Figure 7).
【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。DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be explained in detail below based on specific examples shown in the accompanying drawings. FIG. 1 is a cross-sectional view showing the molded state of the joining structure of the present invention, showing the state before mold clamping for secondary molding after primary molding of each half of the hollow body. FIG. 2 is an enlarged perspective view of the main parts thereof, FIG. 3 is a sectional view showing a state in which 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 main parts. It 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は本体部３０の衝合端面周縁部にやや上がっ
た位置から外方に突出したフランジ部３１、３２を有し
、そのフランジ面には長手方向に沿って断続的に型抜き
方向の貫通穴３３が複数形成されている。他方、半割体
４も本体部４０の衝合端面周縁部にはやや下がった位置
で外方に突出したフランジ部４１、４２を有し、そのフ
ランジ面には上記貫通穴３３と対応しない位置に貫通穴
４３が断続的に長手方向に形成されている。In the drawings, 1 is an upper mold, 2 is a lower mold, and hollow halves 3 and 4 are molded in each mold. The half body 3 has flanges 31 and 32 that protrude outward from a slightly elevated position on the periphery of the abutting end surface of the main body 30, and the flange surfaces are intermittently cut out along the longitudinal direction. A plurality of through holes 33 are formed in different directions. On the other hand, the half body 4 also has flanges 41 and 42 protruding outward at a slightly lowered position on the periphery of the abutting end surface of the main body 40, and a position on the flange surface that does not correspond to the through hole 33 is provided. Through holes 43 are formed intermittently in the longitudinal direction.
【０００８】上記貫通穴３３、４３は半割体の周縁部全
長わたって形成されるのがよい（第２図参照）。上記フ
ランジ面に形成された貫通穴３３および４３は半割体３
および４の衝合状態では、図４および図６に示すように
長手方向に連続し、上下に屈曲した空所路Ｒ１を形成す
るので、スプールを介して上記屈曲した空所路Ｒ１に溶
融樹脂Ｂを注入すると上記フランジ部３１、３２および
４１、４２は貫通穴３３および４３によって拡大された
接合面積にわたって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。しかも貫通穴３
３、４３を介してフランジ部の外側面にまわった溶融樹
脂Ｂは図７に示すようにフランジ部３１、３２および４
１、４２を捕らえるので、アンカー効果を発揮し、両半
割体３および４を垂直方向に係合させることになる。The through holes 33, 43 are preferably formed over the entire length of the peripheral edge of the half body (see FIG. 2). The through holes 33 and 43 formed in the flange surface are formed in the half body 3.
In the abutting state of FIGS. 4 and 4, a cavity path R1 that is continuous in the longitudinal direction and bent vertically is formed as shown in FIGS. When B is injected, the bonding force of the molten resin acts on the peripheral bonding end surfaces of the half bodies 3 and 4 over the bonding area enlarged by the through holes 33 and 43 in the flange portions 31, 32 and 41, 42. Moreover, through hole 3
As shown in FIG.
1 and 42, it exerts an anchoring effect and engages both halves 3 and 4 in the vertical direction.
【０００９】上記屈曲した空所路Ｒ１は互いに対向しな
い位置で上下に貫通した穴によって形成したが、図８に
示すように、上側のフランジ部３１、３２の貫通穴３４
と下側のフランジ部４１、４２の貫通穴４４とが斜め方
向に対向して連通するようにして同時に上下のフランジ
部にアンカー効果を発揮させるようにしてもよい。さら
に、図９に示すように、互いに対向しない内側の貫通穴
３５、４５と互いに対向し合う貫通穴３６、４６とを形
成してアンカー効果を発揮させるようにしてもよい。The bent cavity path R1 is formed by vertically penetrating holes at positions that do not face each other, but as shown in FIG.
The through holes 44 of the lower flange parts 41 and 42 may face each other diagonally and communicate with each other, so that the upper and lower flange parts simultaneously exhibit an anchor effect. Furthermore, as shown in FIG. 9, inner through holes 35 and 45 that do not face each other and through holes 36 and 46 that face each other may be formed to exhibit an anchor effect.
【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
は型抜き方向に貫通する貫通穴をフランジ部の長手方向
に沿って複数断続的に形成して屈曲した空所を形成する
ので、スライド構造を付設せずとも成形可能である。ま
た、衝合状態でその屈曲した空所に溶融樹脂を注入する
と、空所によって、接合するフランジ部との接触面積は
拡大され、しかも貫通穴を介してフランジ部の外側にま
わる溶融樹脂が垂直方向の係合力を発揮することになり
、強い接合強度を持つことができる。As is clear from the above description, according to the present invention, injection molded half bodies are abutted against each other in their end faces in a mold, and molten resin for joining is applied to the abutting portions. In a structure in which material is injected and joined, a plurality of through holes penetrating in the die cutting direction are formed intermittently along the longitudinal direction of the flange part on the joining end surface of each half body to form a bent cavity. Therefore, it can be molded without adding a slide structure. In addition, when molten resin is injected into the bent cavity in the abutting state, the contact area with the flange part to be joined is expanded by the cavity, and the molten resin flowing to the outside of the flange part through the through hole is perpendicular. This results in directional engagement force being exerted, and strong bonding strength can be achieved.
【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 sectional view showing the molded state of the joint structure of the present invention;
【図２】 図１の要部拡大斜視図、[Figure 2] An enlarged perspective view of the main parts of Figure 1,
【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] A cross-sectional view showing a state in which molten resin is injected into the joint structure of the present invention,
【図４】 図３の要部拡大斜視図、[Figure 4] An enlarged perspective view of the main parts of Figure 3,
【図５】 図４のＶ−Ｖ線断面図、[Figure 5] Cross-sectional view along the line V-V in Figure 4,
【図６】 図５のＶＩ−ＶＩ線断面図、[Figure 6] Cross-sectional view along the line VI-VI in Figure 5,
【図７】
図６の要部拡大図、[Figure 7]
An enlarged view of the main part of Figure 6,
【図８】 本発明の接合構造の第２変形例の図５相当
の断面図、FIG. 8 is a sectional view corresponding to FIG. 5 of a second modification of the joining structure of the present invention;
【図９】 本発明の接合構造の第２変形例の図５相当
の断面図。FIG. 9 is a sectional view corresponding to FIG. 5 of a second modification of the joining structure of the present invention.
１は上型、２は下型、３および４は中空体の半割体、３
０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、Ｒ
１は屈曲した空所路。1 is an upper mold, 2 is a lower mold, 3 and 4 are hollow halves, 3
0 and 40 are main body parts, 31 and 32 are flange parts, 33
is a through hole, 41 and 42 are flange parts, 43 is a through hole, R
1 is a curved empty road.
Claims (1)
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、各半割体の衝
合端面に互いに一定の間隔をおいて対向するフランジ部
をそれぞれ形成し、その両フランジ部には長手方向に断
続的に型抜き方向に貫通穴を形成し、各半割体の端面衝
合状態で両フランジ部の上記貫通穴により形成される蛇
行状の空所に上記溶融樹脂が注入されるように形成した
ことを特徴とする合成樹脂製中空体の接合構造。Claim 1: In a structure in which injection-molded half bodies are joined by abutting their end faces against each other in a mold and a molten resin material for joining is injected into the abutting portions, each half body is Flange parts facing each other at a constant interval are formed on the abutting end faces, and through holes are formed intermittently in the longitudinal direction in the die cutting direction in both flanges, so that the end faces of each half are abutted. 1. A joint structure for synthetic resin hollow bodies, characterized in that the molten resin is injected into the meandering cavity formed by the through holes of both flanges.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1297091A JPH0739144B2 (en) | 1991-01-09 | 1991-01-09 | Joint structure of hollow synthetic resin |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1297091A JPH0739144B2 (en) | 1991-01-09 | 1991-01-09 | Joint structure of hollow synthetic resin |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH04279318A true JPH04279318A (en) | 1992-10-05 |
| JPH0739144B2 JPH0739144B2 (en) | 1995-05-01 |
Family
ID=11820091
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP1297091A Expired - Fee Related JPH0739144B2 (en) | 1991-01-09 | 1991-01-09 | Joint structure of hollow synthetic resin |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0739144B2 (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2002086573A (en) * | 2000-09-12 | 2002-03-26 | Canon Inc | Part-bonded body, process cartridge, and apparatus for forming electrophotographic image |
| JP2010030101A (en) * | 2008-07-28 | 2010-02-12 | Asahi Electric Works Ltd | Hollow molding and method for manufacturing the same |
-
1991
- 1991-01-09 JP JP1297091A patent/JPH0739144B2/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2002086573A (en) * | 2000-09-12 | 2002-03-26 | Canon Inc | Part-bonded body, process cartridge, and apparatus for forming electrophotographic image |
| JP2010030101A (en) * | 2008-07-28 | 2010-02-12 | Asahi Electric Works Ltd | Hollow molding and method for manufacturing the same |
Also Published As
| Publication number | Publication date |
|---|---|
| JPH0739144B2 (en) | 1995-05-01 |
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