JPH0566848B2 - - Google Patents
Info
- Publication number
- JPH0566848B2 JPH0566848B2 JP28070087A JP28070087A JPH0566848B2 JP H0566848 B2 JPH0566848 B2 JP H0566848B2 JP 28070087 A JP28070087 A JP 28070087A JP 28070087 A JP28070087 A JP 28070087A JP H0566848 B2 JPH0566848 B2 JP H0566848B2
- Authority
- JP
- Japan
- Prior art keywords
- rubber
- mold
- gasket
- spool runner
- molding
- 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 - Fee Related
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
- B29C45/14336—Coating a portion of the article, e.g. the edge of the article
- B29C45/14344—Moulding in or through a hole in the article, e.g. outsert moulding
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C45/00—Injection moulding, i.e. forcing the required volume of moulding material through a nozzle into a closed mould; Apparatus therefor
- B29C45/17—Component parts, details or accessories; Auxiliary operations
- B29C45/26—Moulds
- B29C45/27—Sprue channels ; Runner channels or runner nozzles
- B29C45/2756—Cold runner channels
-
- 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
- B29C45/14336—Coating a portion of the article, e.g. the edge of the article
- B29C2045/14459—Coating a portion of the article, e.g. the edge of the article injecting seal elements
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29K—INDEXING SCHEME ASSOCIATED WITH SUBCLASSES B29B, B29C OR B29D, RELATING TO MOULDING MATERIALS OR TO MATERIALS FOR MOULDS, REINFORCEMENTS, FILLERS OR PREFORMED PARTS, e.g. INSERTS
- B29K2021/00—Use of unspecified rubbers as moulding material
- B29K2021/006—Thermosetting elastomers
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、内燃機関のフランジ間を密封するに
用いられるガスケツトに関し、具体的には該ガス
ケツトの開口部に形成されるラバーグロメツトの
製造方法に関する。DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a gasket used for sealing between flanges of an internal combustion engine, and specifically to manufacturing a rubber grommet formed at an opening of the gasket. Regarding the method.
従来、内燃機関用ガスケツトは通気穴、油穴、
水穴等の開口部に金属製あるいはラバー製のグロ
メツトを装着して重点密封をなさしめており、こ
の内のラバーグロメツトを形成するには、予め所
望する形状に造形したラバーグロメツトをガスケ
ツト材の開口部に接着・または嵌着などするか、
あるいは成形型をもつて該開口部に直接加硫接着
などして一体化せしめていた。
Conventionally, gaskets for internal combustion engines have ventilation holes, oil holes,
Metal or rubber grommets are attached to the openings of water holes, etc. to provide a tight seal.To form the rubber grommet, the rubber grommet, which has been shaped in advance into the desired shape, is used as a gasket material. Glue or fit into the opening of
Alternatively, it was directly integrated into the opening by vulcanization and adhesion using a mold.
しかしながら、ラバーグロメツトを予め成形し
た後に一体化させる方法は、大きな作業手間を必
要として製造コストを上昇させ、それにもまして
組付精度が低いという重大な欠点を持つており高
温・高圧に耐えうる構造でない。
However, the method of pre-forming rubber grommets and then integrating them requires a large amount of work and labor, which increases manufacturing costs, and has the serious drawback of low assembly accuracy, and cannot withstand high temperatures and pressures. Not a structure.
また、成形型を持つてガスケツト材にラバーグ
ロメツトを加硫接着させる製造方法では、キヤビ
テイ内にガスケツト材とゴム材料とを投入して型
閉めする構造であるから該ゴム材料を流動させる
圧力が上・下の二方向からしか得られず、従つて
キヤビテイ内の角々までゴム材料を行渡らせるた
めには多くの食出し捨て材料を見込まなければな
らない。そして、圧縮初期には型閉めが完了して
いない状態にあるから材料移動し易いもので成形
安定性に劣り製品価格も高価にならざるを得なか
つた。 In addition, in the manufacturing method in which a rubber grommet is vulcanized and bonded to a gasket material by holding a mold, the gasket material and the rubber material are put into the cavity and the mold is closed, so the pressure that causes the rubber material to flow is high. Rubber material can only be obtained from two directions, top and bottom, and therefore a large amount of disposable material must be used in order to distribute the rubber material to every corner within the cavity. Furthermore, since the mold has not yet been closed at the initial stage of compression, the material is likely to move, resulting in poor molding stability and a high product price.
この成形性を改善するには材料注入成形方法も
有効であるが、成形物の質量に対してスプール部
及びライナー部等で加硫される質量を多く必要と
し価格的不利益を残つてしまう。 Although material injection molding is effective in improving the moldability, it requires a large amount of mass to be vulcanized in the spool portion, liner portion, etc. relative to the mass of the molded product, resulting in a cost disadvantage.
本発明はこの様な欠点に鑑み、優れた成形性を
少量の材料でなし得ることのできるラバーグロメ
ツトの製造方法を提供することを目的としてい
る。
In view of these drawbacks, it is an object of the present invention to provide a method of manufacturing a rubber grommet that can achieve excellent moldability with a small amount of material.
以下、図面を参照しつつつ詳述する。 A detailed description will be given below with reference to the drawings.
〔問題点を解決するための手段〕
本発明は、第２図に示す如く内燃機関用ガスケ
ツトＤが備えたラバーグロメツト１の製造方法で
あつて；前記ラバーグロメツト１をトランスフア
ー成形あるいはインゼクシヨン成形等の材料を型
内に注入する成形方法によつて造形するとき、第
１図に示す様に所望形状のキヤビテイ２を持ち高
温状態におかれる成形型Ａと、各々のキヤビテイ
２に材料供給するスプールランナー型Ｂとの間に
断熱材Ｃを挿着し、該スプールランナー型Ｂには
冷却穴３をめぐらせて冷却媒体によつてこれを冷
却せしめ、ガスケツト材４を投入し型閉めされた
キヤビテイ２内に前記スプールランナー型Ｂのゲ
ート６からゴム材料５を加熱された成型型Ａに適
量注入して加硫硬化させガスケツト材４と一体化
したラバーグロメツト１を成型せしめることを特
徴としている。[Means for Solving the Problems] The present invention is a method for manufacturing a rubber grommet 1 included in a gasket D for an internal combustion engine as shown in FIG. 2; When molding is performed by a molding method in which material is injected into the mold, as shown in FIG. A heat insulating material C is inserted between the spool runner mold B and the spool runner mold B, cooling holes 3 are arranged around the spool runner mold B to cool it with a cooling medium, and a gasket material 4 is put in and the mold is closed. An appropriate amount of rubber material 5 is injected into the heated mold A from the gate 6 of the spool runner type B into the cavity 2 which has been vulcanized and hardened to form a rubber grommet 1 integrated with the gasket material 4. It is said that
ここで用いた材料注入成形方法とは、熱硬化す
る材料の一つの成形方法であつて、該材料を移送
室内から高圧下で適切なスプール・ランナー・ゲ
ートを通して閉じた成型型Ａ内へ送り込み熱硬化
させるものである。
The material injection molding method used here is a method for molding thermosetting materials, in which the material is fed from a transfer chamber under high pressure through an appropriate spool, runner, and gate into a closed mold A. It hardens.
この成形方法による本発明は、第１図に示す様
に、前記成形型Ａとスプールランナー型Ｂとの間
に断熱材Ｃを介在させて成形型Ａの熱をスプール
ランナー型に伝えない様に遮断せしめ、さらにス
プールランナー型Ｂに冷却穴３を設けこれを積極
的に冷却しており、従つて該スプールランナー型
Ｂは少なくともゴム材料５の加硫温度以下に保つ
ことができこの内にあるゴム材料５の加硫硬化を
防止する。この状況下でスプールランナー型Ｂか
ら成形型Ａのキヤビテイ２内に成形状態に合わせ
て適量のゴム材料５を供給し、成形型Ａ内では他
部の熱に左右されることなく所定の熱によつて成
形加硫工程をこなすから、成形型Ａとスプールラ
ンナー部Ｂのそれぞれが独立した効率の良い働き
をなす。 As shown in FIG. 1, the present invention based on this molding method is such that a heat insulating material C is interposed between the mold A and the spool runner mold B so that the heat of the mold A is not transmitted to the spool runner mold. In addition, cooling holes 3 are provided in the spool runner type B to actively cool the spool runner type B, so that the spool runner type B can be kept at least below the vulcanization temperature of the rubber material 5. Prevents vulcanization and hardening of the rubber material 5. Under this situation, an appropriate amount of rubber material 5 is supplied from the spool runner mold B into the cavity 2 of the mold A according to the molding state, and the mold A is heated to a predetermined level without being affected by heat from other parts. Therefore, since the forming and vulcanizing process is carried out, the forming mold A and the spool runner section B each function independently and efficiently.
この構成でのさらなる特徴は、前述の様にスプ
ール及びランナーによつて各々のキヤビテイ２に
配給されるゴム材料５はいつまでも加硫されない
ので該キヤビテイ２の最も近い箇所に注入用のゲ
ート６を配設することができ、従つて該ゲート６
からキヤビテイ２間の小寸法部分だけしか余剰捨
て材料を必要としない極めて材料歩留りに優れる
ものとなる。 A further feature of this configuration is that, as mentioned above, the rubber material 5 delivered to each cavity 2 by the spool and runner is not vulcanized forever, so the injection gate 6 is arranged at the point closest to the cavity 2. Therefore, the gate 6
Therefore, surplus waste material is required only in the small-sized portion between the cavities 2, resulting in an extremely excellent material yield.
本発明を実施するに、内燃機関用ガスケツトＤ
は通常高温高圧下で使用されるものであるからラ
バーグロメツト１を形成するゴム材料５も耐熱性
及び耐圧性を有する素材料を用いる必要があり、
一般的には高価なフツ素ゴム・シリコンゴムある
いはアクリルゴム等が用いられている。
To carry out the present invention, a gasket D for an internal combustion engine is used.
Since the rubber grommet 1 is usually used under high temperature and high pressure, the rubber material 5 forming the rubber grommet 1 must also be a material having heat resistance and pressure resistance.
Generally, expensive fluorine rubber, silicone rubber, acrylic rubber, etc. are used.
これらのゴム材料５を高圧下で移送するとき、
移送室とかスプールランナー部に加硫しない程度
の適度の温度を持たしめる構造が該ゴム材料５の
軟化を促し移送注入を容易とするので好ましい構
造となる。 When these rubber materials 5 are transferred under high pressure,
A structure in which the transfer chamber or spool runner section is kept at an appropriate temperature to prevent vulcanization is a preferable structure because it promotes softening of the rubber material 5 and facilitates transfer and injection.
以上の説明の様に、本発明は部分的に成形型を
冷却せしめて優れた成形性及び良好な材料歩留り
を得たもので、低価格で高い精度を持つて強い密
封をなす理想的なラバーグロメツトの製造方法で
ある。
As explained above, the present invention achieves excellent moldability and good material yield by partially cooling the molding die, and is an ideal rubber that has high precision and strong sealing at a low cost. This is a method for manufacturing grommets.
第１図は本発明の製造方法の一実施例を表わす
断面図である。第２図は内燃機関用ガスケツトの
平面図である。
Ａ……成形型、Ｂ……スプールランナー型、Ｃ
……断熱材、Ｄ……内燃機関用ガスケツト、１…
…ラバーグロメツト、２……キヤビテイ、３……
冷却穴、４……ガスケツト材、５……ゴム材料、
６……ゲート。
FIG. 1 is a sectional view showing an embodiment of the manufacturing method of the present invention. FIG. 2 is a plan view of a gasket for an internal combustion engine. A...Molding mold, B...Spool runner mold, C
...Insulation material, D...Gasket for internal combustion engine, 1...
...Rubber grommet, 2...Cavity, 3...
Cooling hole, 4... Gasket material, 5... Rubber material,
6...Gate.
Claims (1)
メツト１を造形する製造方法において；前記ラバ
ーグロメツト１を材料注入成形方法によつて造形
するとき、所望形状のキヤビテイ２を持ち高温度
に加温される成形型Ａと、スプールランナー型Ｂ
とと間に断熱材Ｃを介在させ、該スプールランナ
ー型Ｂに冷却穴３をめぐらせて水または他の冷却
媒体で冷却せしめ、このスプールランナー型Ｂの
ゲート６からガスケツト材４を予め挿入したキヤ
ビテイ２内にゴム材料５を適量注入してガスケツ
ト材４と加硫一体化させることを特徴としたラバ
ーグロメツトの製造方法。1 In a manufacturing method for molding a rubber grommet 1 included in a gasket D for an internal combustion engine; when molding the rubber grommet 1 by a material injection molding method, the rubber grommet 1 has a cavity 2 of a desired shape and is heated to a high temperature. mold A and spool runner mold B
A heat insulating material C is interposed between the spool runner type B, cooling holes 3 are arranged around the spool runner type B, and the gasket material 4 is inserted in advance through the gate 6 of the spool runner type B. A method for manufacturing a rubber grommet characterized by injecting an appropriate amount of rubber material 5 into a cavity 2 and vulcanizing and integrating it with a gasket material 4.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP28070087A JPH01122420A (en) | 1987-11-05 | 1987-11-05 | Manufacture of rubber grommet |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP28070087A JPH01122420A (en) | 1987-11-05 | 1987-11-05 | Manufacture of rubber grommet |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH01122420A JPH01122420A (en) | 1989-05-15 |
| JPH0566848B2 true JPH0566848B2 (en) | 1993-09-22 |
Family
ID=17628731
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP28070087A Granted JPH01122420A (en) | 1987-11-05 | 1987-11-05 | Manufacture of rubber grommet |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH01122420A (en) |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0752177A (en) * | 1993-08-19 | 1995-02-28 | San Mold:Kk | Rubber forming apparatus |
| CN100336652C (en) * | 2004-12-29 | 2007-09-12 | 蒋迎峰 | Rubber injecting device with cold runner |
| JP4868457B2 (en) * | 2007-06-28 | 2012-02-01 | シグマ紙業株式会社 | Packaging container |
-
1987
- 1987-11-05 JP JP28070087A patent/JPH01122420A/en active Granted
Also Published As
| Publication number | Publication date |
|---|---|
| JPH01122420A (en) | 1989-05-15 |
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