JPH0785904B2 - Synthetic resin tubular mold molding structure - Google Patents
Synthetic resin tubular mold molding structureInfo
- Publication number
- JPH0785904B2 JPH0785904B2 JP2024751A JP2475190A JPH0785904B2 JP H0785904 B2 JPH0785904 B2 JP H0785904B2 JP 2024751 A JP2024751 A JP 2024751A JP 2475190 A JP2475190 A JP 2475190A JP H0785904 B2 JPH0785904 B2 JP H0785904B2
- Authority
- JP
- Japan
- Prior art keywords
- synthetic resin
- tubular body
- mold
- partial
- tubular bodies
- 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
- B29C45/0053—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
- B29C66/547—Joining several hollow-preforms, e.g. half-cylinders, to form tubular articles, e.g. endless tubes
Landscapes
- Engineering & Computer Science (AREA)
- Manufacturing & Machinery (AREA)
- Mechanical Engineering (AREA)
- Moulds For Moulding Plastics Or The Like (AREA)
- Injection Moulding Of Plastics Or The Like (AREA)
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管状体成形用型構造に関し、より詳
しくはフランジに型合わせ部や接合部が出ないためシー
ル性に優れる合成樹脂製管状体の成形用型構造に関す
る。Description: TECHNICAL FIELD The present invention relates to a synthetic resin tubular body molding die structure, and more specifically, a synthetic resin excellent in sealing property because a flange does not have a mating portion or a joint portion. The present invention relates to a mold structure for molding a tubular body.
[従来技術と課題] 従来、合成樹脂製管状体は熱可塑性合成樹脂を押出し成
形する事によって製造されている。管自体は連続的に押
出す事も出来るが、少なくとも一端にフランジを有する
管を造ろうとすると、割型を用いて成形されるのが普通
であった。特にエルボや分岐管、ましてこれらと変形フ
ランジとの組合せになるとほぼ必ずそうであった。[Prior Art and Problems] Conventionally, a synthetic resin tubular body is manufactured by extruding a thermoplastic synthetic resin. The tube itself can be extruded continuously, but when it was attempted to make a tube having a flange at least at one end, it was usually formed using a split mold. Especially when it comes to elbows and branch pipes, let alone the combination of these with deformation flanges.
そうするとフランジ部にもほぼ必ず型合わせ部もしくは
接合部が現われる事になり、そのため成形管をそのまま
フランジで繋ごうとするとO−リング等のパッキングが
あっても段差を吸収し切れず、洩れの発生を禁じ得なか
った。かといって入念に手作業で仕上げ研摩するのでは
コスト、時間がかかり過ぎてしまうという問題点があっ
た。If so, the mold fitting portion or the joining portion will almost always appear in the flange portion. Therefore, if the molding pipe is directly connected with the flange, the difference in level cannot be absorbed even if there is packing such as an O-ring, and leakage will occur. I couldn't forbid it. However, there is a problem that it takes too much cost and time to carefully finish and polish.
そこで本発明者等は金型スライド法(特開昭62−8731
5)によってこの問題を解決し得る事を見出し、鋭意研
究の結果本発明を完成するに至った。Therefore, the inventors of the present invention have proposed a mold slide method (Japanese Patent Laid-Open No. 62-8731
It was found that this problem could be solved by 5), and as a result of earnest research, the present invention was completed.
[発明の目的] 本発明の目的はフランジに接合部の凹凸が全く現われず
平滑な面が現われ漏れのない管固着の出来る合成樹脂製
管状体成形用型構造を提供する事である。[Object of the Invention] It is an object of the present invention to provide a synthetic resin tubular body molding die structure capable of fixing pipes without any unevenness of a joint portion on a flange and showing a smooth surface without leakage.
[発明の構成] 本発明により、 少なくとも一端にフランジ部を有する合成樹脂製管状体
成形用型構造において、該フランジ部を除いてほぼ全長
に亘り該管状体を管軸方向に直角に断面で見てラジアル
方向に二分割した形をなす二つの部分管状体を夫々一次
射出により成形する一対の金型と、型開き後前記一対の
金型の内いずれか一方を型開き方向とほぼ直角方向に移
動させて二つの部分管状体を接当し、該二つの部分管状
体と融着組成の合成樹脂を二つの部分管状体が接当する
開先付接合ラインに二次射出する事により両者を接合な
し得る機構とでなる事を特徴とするフランジ部のシール
性に優れた合成樹脂製管状体成形用型構造 が提供される。[Structure of the Invention] According to the present invention, in a synthetic resin tubular body molding die structure having a flange portion on at least one end, the tubular body is seen in a cross section perpendicular to the pipe axis direction over substantially the entire length excluding the flange portion. And a pair of molds for respectively molding two partial tubular bodies that are divided into two in the radial direction by primary injection, and after opening the mold, either one of the pair of molds is formed in a direction substantially perpendicular to the mold opening direction. The two partial tubular bodies are moved and brought into contact with each other, and the two partial tubular bodies and the synthetic resin having a fusion composition are secondarily injected to a joint line with a groove where the two partial tubular bodies are brought into contact with each other. Provided is a synthetic resin tubular body molding die structure excellent in sealing property of a flange portion, which is characterized by a mechanism capable of joining.
以下に実施例を用いて本発明を詳細に説明する。The present invention will be described in detail below with reference to examples.
[実施例] 第4図は製品管状体(オイルストレーナ部品)1の斜視
図、第5図は第4図のV−V′断面図である。第4図,
第5図上40は(分割)接合ラインである。[Embodiment] FIG. 4 is a perspective view of a product tubular body (oil strainer component) 1, and FIG. 5 is a sectional view taken along line VV ′ of FIG. Figure 4,
The upper part 40 in FIG. 5 is a (divided) joining line.
第6,7図は夫々部分管状体(半割体)A,Bの斜視図であ
る。FIGS. 6 and 7 are perspective views of partial tubular bodies (half-split bodies) A and B, respectively.
第4,5,6,7図において、部分管状体A,Bは夫々完全なフラ
ンジ部2,3を有している。In FIGS. 4, 5, 6 and 7, the partial tubular bodies A and B have complete flange portions 2 and 3, respectively.
本実施例では第4,5図の如く管の直径方向(180゜)に二
分割する。In this embodiment, the pipe is divided into two in the diameter direction (180 °) as shown in FIGS.
なお第5図でθ1=θ2でもよいし、θ1≠θ2でもよ
い。In FIG. 5, θ 1 = θ 2 may be satisfied, or θ 1 ≠ θ 2 may be satisfied.
但し90゜≦θ1,θ2<180゜特に望ましくは100゜≦θ1,
θ2≦170゜である事が必要である。However, 90 ° ≦ θ 1 , θ 2 <180 °, particularly preferably 100 ° ≦ θ 1 ,
It is necessary that θ 2 ≦ 170 °.
この角度下限は90゜未満であると部分管状体A,Bがその
接合ラインで接当困難になるからであり、上限は180゜
に達すると全接合ラインが水平となり、本発明効果を生
まないからである。This is because if the lower limit of the angle is less than 90 °, it becomes difficult for the partial tubular bodies A and B to contact each other at the joining line, and if the upper limit reaches 180 °, the entire joining line becomes horizontal and the effect of the present invention is not produced. Because.
第1図は、割型と部分管状体(半割体)A,Bとを重ねて
示した概念図である。FIG. 1 is a conceptual diagram showing a split mold and partial tubular bodies (half-split bodies) A and B in an overlapping manner.
第2図は第1図のII−II′断面図である。但し、見易い
様に部分管状体(半割体)A,B間の平面上の距離は縮め
て描かれている。2 is a sectional view taken along the line II-II 'of FIG. However, in order to make it easy to see, the distance on the plane between the partial tubular bodies (half-divided bodies) A and B is reduced.
すなわち、第2図のようにして部分管状体A,Bは夫々固
定型100及び可動型200を雌型として一次射出成形され、
ついで一次射出された半割体A,Bを夫々の雌型に残した
まま可動型200は矢印Eの方向に型開きし、矢印Fの方
向にスライドし、ついで矢印Gの方向に型合わせされ
て、第3図の如く接当する。That is, as shown in FIG. 2, the partial tubular bodies A and B are subjected to primary injection molding using the fixed mold 100 and the movable mold 200 as female molds, respectively.
Then, the movable mold 200 is opened in the direction of arrow E while the halves A and B that have been primarily ejected are left in the respective female molds, slide in the direction of arrow F, and then are aligned in the direction of arrow G. And contact as shown in FIG.
なお予め部分管状体(半割体)A,Bの接合ラインには部
分開先A1,B1が設けられているので、第3図の如く接合
ラインが互いに接当した時点で開先50,50が溝状に接合
ライン上に形成される。この開先は実施例ではU字溝で
あるが、Vノッチ等である事が出来る。In addition, since the partial grooves A1 and B1 are provided in advance on the joining lines of the partial tubular bodies (half-split bodies) A and B, the grooves 50 and 50 are formed when the joining lines come into contact with each other as shown in FIG. Are formed in a groove shape on the joining line. This groove is a U-shaped groove in the embodiment, but can be a V notch or the like.
そこで両開先50,50に図示しない射出口より溶融樹脂が
二次射出され、部分管状体A,Bは接合ライン40が融着接
合される。Then, the molten resin is secondarily injected into the both grooves 50, 50 from an injection port (not shown), and the joining lines 40 are fusion-bonded to the partial tubular bodies A, B.
第8図は一次射出後固定型を取り去り、半割体A,Bを可
動型の雌型に残したとした時の可動型面の正面概念図で
ある。FIG. 8 is a conceptual front view of the movable mold surface when the fixed mold is removed after the primary injection and the half-split bodies A and B are left in the movable female mold.
第8図において取付フランジ部2及び網付フランジ部3
をつくるための各スライドコア,は一次射出の段階
では夫々作動位置にあるが、その前後は退避位置にあ
る。In FIG. 8, the mounting flange portion 2 and the meshed flange portion 3
The respective slide cores for producing the respective are in the operating position at the stage of the primary injection, but before and after that are in the retracted positions.
また部分管状体の各一端には相手型を逃げるための凹部
が設けられておりダイスライドして再び型合わせする時
に邪魔にならないようにしている。In addition, a recess is provided at each end of the partial tubular body to allow the mating mold to escape, so that it does not get in the way when the die is slid to perform mold matching again.
第9図,第10図は夫々第8図のIX−IX′断面図及びX−
X′断面図(一次射出時)である。9 and 10 are sectional views taken along the line IX-IX 'and X- in FIG. 8, respectively.
It is a X'sectional view (at the time of primary injection).
第11図,第12図は第9図,第10図の可動型200が第3図
で説明したようにスライドし再び型合わせされた状態の
夫々の断面図(二次射出時)である。11 and 12 are cross-sectional views (during secondary injection) of the movable die 200 of FIGS. 9 and 10 in a state where the movable die 200 is slid and remolded as described in FIG.
第9図において、最初の固定型100と可動型200の型合わ
せにより部分管状体Bの網付フランジ部3周辺の部分が
固定型に設けられているスライドコアを用いて形成さ
れたキャビティにおいて一次射出され成形される様子が
明らかである。第10図において、同時に部分管状体Aの
部分が同様にスライドコアの作動により一次射出で成
形される様子が明らかである。In FIG. 9, a portion of the partial tubular body B around the meshed flange portion 3 is formed in the cavity formed by using the slide core provided in the fixed die by the first die fitting of the fixed die 100 and the movable die 200. It is clear how they are injected and molded. In FIG. 10, it is clear that at the same time, the part of the partial tubular body A is similarly molded by the primary injection by the operation of the slide core.
そして前記した如く固定型100には部分管状体Bが、可
動型200には部分管状体Aが残った状態で可動型200が第
8図矢印の方向にスライドし、IX−IX′断面、X−X′
断面は夫々第11図,第12図の如く再び型合わせされる。As described above, the movable die 200 slides in the direction of the arrow in FIG. 8 with the partial tubular body B remaining in the fixed die 100 and the partial tubular body A in the movable die 200, and taken along the line IX-IX ′, -X '
The cross sections are remolded as shown in Figs. 11 and 12, respectively.
ここで接合ライン40は正確に接当されるので開先部50の
夫々溶融樹脂が二次射出され、接合ライン40に沿って強
固に接合される。しかる後型開きして製品が取り出され
る。Here, since the joining line 40 is accurately abutted, the molten resin in each of the groove portions 50 is secondarily injected and firmly joined along the joining line 40. Then, the mold is opened and the product is taken out.
ここに一次射出樹脂と二次射出樹脂は同一組成、同系樹
脂でもよいが、互いに融着する親和性を持っていればど
のようなものでもよい。Here, the primary injection resin and the secondary injection resin may have the same composition and the same type of resin, but any resin may be used as long as it has an affinity to be fused with each other.
[発明の効果] 本発明を実施する事により前記目的がすべて達成され
る。[Effects of the Invention] By carrying out the present invention, all the above objects can be achieved.
すなわち、取付フランジ部等の端面に型合わせ部や接合
部が出ないためバリ等の段差が生じる事がなく、従来の
ような滑面化処理をしないでもシール性に優れた合成樹
脂製管状体を能率よく製造出来る型構造が提供される。That is, since there is no mold matching portion or joint portion on the end surface of the mounting flange portion, a step such as a burr does not occur, and a synthetic resin tubular body excellent in sealing property without the conventional smoothing treatment. Provided is a mold structure capable of efficiently manufacturing
第1図は一次射出時の分割型平面概念図、第2図は第1
図のII−II′断面図、第3図はダイスライドして再型合
わせした時(二次射出時)の断面図、第4図は実施例で
ある製品管状体(オイルストレーナ部品)の斜視図、第
5図は第4図のV−V′断面図、 第6図,第7図は夫々部分管状体A,Bの斜視図である。 第8図は第1図の詳細図(概念図)であり、第9図、第
10図は夫々第8図のIX−IX′,X−X′断面図(一次射出
時)であり、第11図,第12図は夫々二次射出時のIX−I
X′,X−X′断面図である。 1……製品管状体、 A,B……部分管状体、 2,3……フランジ部、 40……接合ライン、 50……開先、 100……固定型、 200……可動型。FIG. 1 is a conceptual diagram of a split type plane at the time of primary injection, and FIG.
II-II 'sectional view of the figure, FIG. 3 is a sectional view when die-sliding and remolding (secondary injection), and FIG. 4 is a perspective view of a product tubular body (oil strainer component) which is an embodiment. 5 and 5 are sectional views taken along line VV 'of FIG. 4, and FIGS. 6 and 7 are perspective views of the partial tubular bodies A and B, respectively. FIG. 8 is a detailed view (conceptual view) of FIG. 1, and FIG.
Fig. 10 is a cross-sectional view of IX-IX ', XX' of Fig. 8 (at the time of primary injection), and Figs. 11 and 12 are IX-I at the time of secondary injection, respectively.
It is a X ', XX' sectional drawing. 1 …… Product tubular body, A, B …… Partial tubular body, 2,3 …… Flange part, 40 …… Joining line, 50 …… Groove, 100 …… Fixed type, 200 …… Movable type.
フロントページの続き (56)参考文献 特開 昭62−87315(JP,A) 特開 昭62−181125(JP,A)Continuation of the front page (56) References JP-A-62-87315 (JP, A) JP-A-62-181125 (JP, A)
Claims (1)
樹脂製管状体成形用型構造において、該フランジ部を除
いてほぼ全長に亘り該管状体を管軸方向に直角な断面で
見てラジアル方向に二分割した形をなす二つの部分管状
体を夫々一次射出により成形する一対の金型と、型開き
後前記一対の金型の内いずれか一方を型開き方向とほぼ
直角方向に移動させて二つの部分管状体を接当し、該二
つの部分管状体と融着組成の合成樹脂を二つの部分管状
体が接当する開先付接合ラインに二次射出する事により
両者を接合なし得る機構となる事を特徴とするフランジ
部のシール性に優れた合成樹脂製管状体成形用型構造。1. A synthetic resin tubular body molding die structure having a flange portion at least at one end thereof, in the radial direction when the tubular body is seen in a cross section perpendicular to the pipe axis direction over substantially the entire length excluding the flange portion. A pair of molds for respectively molding two partial tubular bodies each having a two-divided shape by primary injection, and after mold opening, one of the pair of molds is moved in a direction substantially perpendicular to the mold opening direction, and A mechanism for joining two partial tubular bodies to each other by secondary injection of a synthetic resin having a fusion composition with the two partial tubular bodies to a joint line with a groove where the two partial tubular bodies abut. A mold structure for molding a tubular body made of synthetic resin with excellent sealing properties at the flange, which is characterized by:
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP2024751A JPH0785904B2 (en) | 1990-02-03 | 1990-02-03 | Synthetic resin tubular mold molding structure |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP2024751A JPH0785904B2 (en) | 1990-02-03 | 1990-02-03 | Synthetic resin tubular mold molding structure |
Publications (2)
Publication Number | Publication Date |
---|---|
JPH03230924A JPH03230924A (en) | 1991-10-14 |
JPH0785904B2 true JPH0785904B2 (en) | 1995-09-20 |
Family
ID=12146851
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP2024751A Expired - Lifetime JPH0785904B2 (en) | 1990-02-03 | 1990-02-03 | Synthetic resin tubular mold molding structure |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPH0785904B2 (en) |
Families Citing this family (12)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2920150B2 (en) * | 1993-06-30 | 1999-07-19 | 株式会社日本製鋼所 | Method for forming hollow body product and mold device used for carrying out the method |
JP2656723B2 (en) * | 1994-01-11 | 1997-09-24 | 株式会社日本製鋼所 | Bent tubular body made of resin |
JP3202920B2 (en) * | 1996-07-03 | 2001-08-27 | ダイハツ工業株式会社 | Method and apparatus for producing synthetic resin tubular body and synthetic resin intake manifold |
JPH10266912A (en) * | 1997-03-27 | 1998-10-06 | Denso Corp | Intake system for internal combustion engine and its manufacture |
JP3916729B2 (en) * | 1997-07-04 | 2007-05-23 | シンコハンガー株式会社 | Plastic hanger and manufacturing method thereof |
JP3846534B2 (en) * | 1999-11-09 | 2006-11-15 | 日産自動車株式会社 | Injection welding molding method for resin products having bowl-shaped flange |
JP2002079541A (en) * | 2000-09-07 | 2002-03-19 | Kojima Press Co Ltd | Oil strainer and its production method |
US6386856B1 (en) * | 2000-09-21 | 2002-05-14 | Ming-Dong Chern | Mold assembly |
ITNA20040040A1 (en) * | 2004-07-16 | 2004-10-16 | Acroplastica S R L | MANUFACTURING PROCEDURE FOR OBTAINING DISTRIBUTOR ASSEMBLIES SUITABLE FOR LOADING WATER IN THE DETERGENT COMPARTMENTS OF HOUSEHOLD APPLIANCES USED FOR WASHING. |
JP5797096B2 (en) * | 2011-11-17 | 2015-10-21 | タイガースポリマー株式会社 | Plastic tube |
JP5697586B2 (en) * | 2011-12-01 | 2015-04-08 | 株式会社日豊製作所 | Manufacturing method of hollow tube made of synthetic resin |
JP6804754B2 (en) * | 2016-09-30 | 2020-12-23 | 内山工業株式会社 | Tubular body |
Family Cites Families (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS6287315A (en) * | 1985-10-15 | 1987-04-21 | Japan Steel Works Ltd:The | Molding of hollow molded part and mold used therefor |
-
1990
- 1990-02-03 JP JP2024751A patent/JPH0785904B2/en not_active Expired - Lifetime
Also Published As
Publication number | Publication date |
---|---|
JPH03230924A (en) | 1991-10-14 |
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