JPS6147226A - Injection mold for silicone rubber roller - Google Patents
Injection mold for silicone rubber rollerInfo
- Publication number
- JPS6147226A JPS6147226A JP16859984A JP16859984A JPS6147226A JP S6147226 A JPS6147226 A JP S6147226A JP 16859984 A JP16859984 A JP 16859984A JP 16859984 A JP16859984 A JP 16859984A JP S6147226 A JPS6147226 A JP S6147226A
- Authority
- JP
- Japan
- Prior art keywords
- mold
- silicone rubber
- hollow cylindrical
- cylindrical mold
- injection
- 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
- 229920002379 silicone rubber Polymers 0.000 title claims abstract description 36
- 239000004945 silicone rubber Substances 0.000 title claims abstract description 33
- 238000002347 injection Methods 0.000 title claims abstract description 17
- 239000007924 injection Substances 0.000 title claims abstract description 17
- 238000010438 heat treatment Methods 0.000 claims abstract description 21
- 239000002184 metal Substances 0.000 claims abstract description 13
- 230000002093 peripheral effect Effects 0.000 abstract description 10
- 238000001746 injection moulding Methods 0.000 abstract description 7
- 238000007259 addition reaction Methods 0.000 abstract description 5
- 239000007788 liquid Substances 0.000 abstract description 5
- 239000004944 Liquid Silicone Rubber Substances 0.000 abstract description 3
- VYZAMTAEIAYCRO-UHFFFAOYSA-N Chromium Chemical compound [Cr] VYZAMTAEIAYCRO-UHFFFAOYSA-N 0.000 abstract description 2
- 238000000034 method Methods 0.000 abstract description 2
- 238000007747 plating Methods 0.000 abstract description 2
- 238000000465 moulding Methods 0.000 description 5
- 238000004519 manufacturing process Methods 0.000 description 3
- 238000010073 coating (rubber) Methods 0.000 description 2
- 239000011247 coating layer Substances 0.000 description 2
- 230000015572 biosynthetic process Effects 0.000 description 1
- 238000005266 casting Methods 0.000 description 1
- 239000011248 coating agent Substances 0.000 description 1
- 238000000576 coating method Methods 0.000 description 1
- 238000007796 conventional method Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000005304 joining Methods 0.000 description 1
- 239000012763 reinforcing filler 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
-
- 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
- B29C45/261—Moulds having tubular mould cavities
-
- 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
- B29K2083/00—Use of polymers having silicon, with or without sulfur, nitrogen, oxygen, or carbon only, in the main chain, as moulding material
- B29K2083/005—LSR, i.e. liquid silicone rubbers, or derivatives thereof
Landscapes
- Engineering & Computer Science (AREA)
- Manufacturing & Machinery (AREA)
- Mechanical Engineering (AREA)
- Fixing For Electrophotography (AREA)
- Moulds For Moulding Plastics Or The Like (AREA)
Abstract
Description
【発明の詳細な説明】
［発明の技術分野］
本発明はシリコーンゴムで被覆された表面が完全に平滑
な（以下鏡面と示す）ローラを液状のシリ、コ汗ンゴム
の射出成形により製造するための成形７用金型に関する
。[Detailed Description of the Invention] [Technical Field of the Invention] The present invention is for producing a roller coated with silicone rubber with a completely smooth surface (hereinafter referred to as mirror surface) by injection molding of liquid silicone rubber. This invention relates to a mold for molding 7.
［発明の技術的背景とその問題点Ｊ
一般に、電子複写機の熱定着用ローラや熱定着プリンタ
のプラテンローラとしては、シリコーンゴムローラが使
用されている。[Technical Background of the Invention and Problems Therewith J Generally, silicone rubber rollers are used as thermal fixing rollers in electronic copying machines and platen rollers in thermal fixing printers.
このようなシリコーンゴムローラは、トナーとの離型性
を確保し紙やフィルムを正しい方向に搬送するために、
表面が平滑で被覆厚が均一であることが要求されており
、従来からローラ芯金上にプレス成形あるいは注型によ
ってシリコーンゴムを被覆した後、表面を研削して仕上
げられていた。These silicone rubber rollers are used to ensure releasability from toner and convey paper or film in the correct direction.
It is required that the surface be smooth and the thickness of the coating be uniform, and conventionally the roller core metal is coated with silicone rubber by press molding or casting, and then the surface is finished by grinding.
しかしながら、このようにして成形され仕上げられるロ
ーラにおいては、ローラ芯金端部のシリコーンゴム除去
を含めた研削仕上げに時間と手間がかかりコストＷにな
るうえに、研削によってシリコーンゴムに配合されてい
る補強充填剤が表面に露出し、しかも表面に細かい凹凸
が形成されて荒れるため、トナーとの離型性が著しく低
下してしまうという欠点があった。However, for rollers that are formed and finished in this way, the grinding process, including the removal of the silicone rubber from the end of the roller core metal, takes time and effort, increasing the cost. Since the reinforcing filler is exposed on the surface and the surface becomes rough due to the formation of fine irregularities, there is a drawback that the releasability from the toner is significantly reduced.
［発明の目的Ｊ
本発明はこのよう欠点を解消するためになされたもので
、液状付加反応型シリコーンゴムを用い、これを射出成
形して無研削で鏡面のシリコーンゴムローラを製造する
ための成形用金型を提供することを目的とする。[Purpose of the Invention J The present invention has been made in order to eliminate the above-mentioned drawbacks, and is a molding method for producing a mirror-finished silicone rubber roller without grinding by injection molding using liquid addition reaction type silicone rubber. The purpose is to provide molds.
［発明の概要］
すなわち本発明は、円筒状のキャビティを有する加熱用
金型の前記キャビティ内に、内周面が鏡面に仕上げられ
かつ内部にローラ芯金が同心的にＩＡ＠された中空円筒
状金型を設置するとともに、前記中空円筒状金型の両端
にそれぞれ前記ローラ芯金を支持するキャップを嵌着し
、かつ前記中空円筒状金型の片端とキャップとの間に内
部に連通するシリコーンゴムの射出注入路を形成してな
ることである。[Summary of the Invention] That is, the present invention provides a heating mold having a cylindrical cavity, and a hollow cylinder whose inner peripheral surface is mirror-finished and a roller core metal is concentrically IA@ inside the cavity. A shaped mold is installed, and a cap that supports the roller core metal is fitted to each end of the hollow cylindrical mold, and one end of the hollow cylindrical mold and the cap communicate with the inside. It is formed by forming an injection injection path for silicone rubber.
［発明の実施例］ 以下本発明の実施例を図面に基づいて説明する。[Embodiments of the invention] Embodiments of the present invention will be described below based on the drawings.
第１図は本発明の一実施例の水平断面図である。FIG. 1 is a horizontal sectional view of one embodiment of the present invention.
この図において符号１は、第２図に示すように、複数の
円筒状のキャビティ２を有し、所定の温度に加熱保温す
ることのできる上下２分割型の加熱用金型を示し、この
加熱用金型１のキャピテイ２にはそれぞれキャビティ２
の内径とほぼ同じ外径を有し内周面が硬質クロムめっき
等により鏡面に仕上げられた中空円筒状金型３が設置さ
れている。In this figure, reference numeral 1 indicates a heating mold that has a plurality of cylindrical cavities 2 and is divided into upper and lower halves, which can be heated and kept at a predetermined temperature, as shown in Figure 2. Each mold 1 has a cavity 2.
A hollow cylindrical mold 3 is installed, which has an outer diameter that is approximately the same as the inner diameter of the mold 3, and whose inner circumferential surface is mirror-finished by hard chrome plating or the like.
この中空円筒状金型３の内部には予め外周面にブライマ
ー処理が施されたローラ芯金４が収容されている。ロー
ラ芯金４は中空円筒状金型３の両端開口部にそれぞれ嵌
着されたキャップ５により中空円筒状金型３と同心的に
軸支されている。Inside this hollow cylindrical mold 3, a roller core metal 4 whose outer peripheral surface has been subjected to a brimer treatment in advance is housed. The roller core metal 4 is supported concentrically with the hollow cylindrical mold 3 by caps 5 fitted to openings at both ends of the hollow cylindrical mold 3, respectively.
また、一対のキャップ５のうち一方は中空円筒状金型３
．に遊嵌されており、キャップ５と中空円筒状金型３と
の嵌合部にはシリコーンゴムの射出注入路６が形成され
ている。射出注入路６の端部はいずれも加熱用金型１に
設けられたランナー７に連結されている。さらにキャッ
プ５の外径は加熱用金型１のキャピテイ２の内径より僅
かに小さく、キャップ５の外周面と加熱用金型１の内周
面との間には１ ｕ程度の隙間が形成されている。Also, one of the pair of caps 5 is attached to the hollow cylindrical mold 3.
．． A silicone rubber injection passage 6 is formed at the fitting portion between the cap 5 and the hollow cylindrical mold 3. Both ends of the injection injection path 6 are connected to runners 7 provided in the heating mold 1. Furthermore, the outer diameter of the cap 5 is slightly smaller than the inner diameter of the capacitance 2 of the heating mold 1, and a gap of about 1 u is formed between the outer peripheral surface of the cap 5 and the inner peripheral surface of the heating mold 1. ing.
このように構成された成形用金型を用いて液状の付加反
応型シリコーンゴムを射出成形しローラを製造するには
、まず、加熱用金型１を所定の温度に予熱した後、射出
成形機により加熱用金型１のランナー７、射出注入路６
を通して中空円筒状金型３とローラ芯金４との間の空隙
内に液状シリコーンゴムを射出充填する。In order to manufacture a roller by injection molding liquid addition reaction type silicone rubber using the molding mold configured in this way, first, the heating mold 1 is preheated to a predetermined temperature, and then the injection molding machine is The runner 7 of the heating mold 1 and the injection injection path 6
Liquid silicone rubber is injected and filled into the gap between the hollow cylindrical mold 3 and the roller core metal 4 through the injection molding device.
次いで加熱用金型１を所定の温度に保持して注入充填さ
れたシリコーンゴムを硬化させた後、加熱用金型１から
中空円筒状金型３を取り出し、シリコーンゴムと型金底
との熱膨張率の差により内部のシリコーンゴムローラが
中空円筒状金型３から容易に抜脱できるようになるまで
冷却し、しかる俵、成形されたシリコーンゴムローラを
取り出す。Next, after holding the heating mold 1 at a predetermined temperature to cure the injected silicone rubber, the hollow cylindrical mold 3 is taken out from the heating mold 1, and the heat between the silicone rubber and the bottom of the mold is removed. It is cooled until the internal silicone rubber roller can be easily removed from the hollow cylindrical mold 3 due to the difference in expansion coefficient, and the bale and molded silicone rubber roller are taken out.
このようにして無研削でンリコーノゴム被覆層の外周面
が完全に鏡面に仕上げられたシリコーンゴムローラを簡
単に製造することがでとる。In this way, it is possible to easily produce a silicone rubber roller whose outer circumferential surface of the silicone rubber coating layer is completely mirror-finished without any grinding.
また、キャップ５の外径を加熱用金型１のキャビティ２
の内径より小さく構成し、キャップ５の外周面と加熱用
金型１の内周面との間に僅かの隙間を設けることにより
、得られるローラの円筒度、同軸度、振れの誤差を最小
限に抑えることができる。Also, the outer diameter of the cap 5 is adjusted to the cavity 2 of the heating mold 1.
By creating a small gap between the outer peripheral surface of the cap 5 and the inner peripheral surface of the heating mold 1, errors in cylindricity, coaxiality, and runout of the resulting roller can be minimized. can be suppressed to
具体的には、１５０℃の温度に予熱された内径４０ ｕ
の円筒状のキャビティを有する加熱用金型を用い、この
キャビティ内に内部に直径２５＋ｍのローラ芯金が同心
的に保持され、両端にそれぞれ最大外径３９ ｘｍのキ
ャップが嵌着された内径３１゜６寵の中空円筒状金型を
設置し、中空円筒状金型とローラ芯金との間の空隙内に
常法により液状の付加反応型シリコーンゴムを射出充填
し、１５０℃の温度で加熱硬化させたところ、外径が３
１゜１ ｕのシリコーンゴムローラが得られ、さらにこ
れを熱処理したところ外径３１．Ｏｎのシリコーンゴム
ローラが得られた。このローラの円筒度、 ′同軸度
、振れはいずれも±０．０３ｎの誤差内にあり、最大外
径が４０１１のキャップを用い同様にして射出成形して
得られたシリコーンゴムローラの誤差範囲（±０．１３
寵以上）比べてはるかに精度が高かった。Specifically, an inner diameter of 40 u preheated to a temperature of 150 °C
A heating mold having a cylindrical cavity is used, and a roller core metal with a diameter of 25+m is held concentrically inside this cavity, and caps with a maximum outer diameter of 39 x m are fitted at both ends.゜A hollow cylindrical mold of 6 cm was installed, and liquid addition reaction type silicone rubber was injected and filled into the gap between the hollow cylindrical mold and the roller core metal using a conventional method, and heated at a temperature of 150°C. After hardening, the outer diameter was 3
A silicone rubber roller with a diameter of 1.1 mm was obtained, and when it was further heat-treated, it had an outer diameter of 31 mm. A silicone rubber roller was obtained. The cylindricity, coaxiality, and runout of this roller are all within an error of ±0.03n, and the error range (± 0.13
The accuracy was much higher than that of
なお、第３因に示すように、下側の加熱用金型８のラン
ナー９と反対側の型接合面１０をキャビティ１１の径と
ほぼ同径の半円柱状に盛り上げて椙成することにより、
ゴム被覆層にエアボイドがなく特性の良好なシリコーン
ゴムローラを射出成形することができる。As shown in the third factor, by raising the mold joint surface 10 of the lower heating mold 8 opposite to the runner 9 into a semi-cylindrical shape with approximately the same diameter as the cavity 11. ,
A silicone rubber roller with good characteristics without air voids in the rubber coating layer can be injection molded.
すなわち、このような構造の加熱用金型８を用いた場合
には、シリコーンゴム注入口１２と反対側のキャピテイ
１１上部に残留し易い空気が半円柱状の上下の型接合面
１０から外側に流出するシリコーンゴムとともに外部に
排出されるのでボイドの発生が抑えられる。That is, when the heating mold 8 having such a structure is used, air that tends to remain in the upper part of the cavity 11 on the opposite side from the silicone rubber injection port 12 is released from the semi-cylindrical upper and lower mold joining surfaces 10 to the outside. Since it is discharged to the outside together with the silicone rubber that flows out, the generation of voids can be suppressed.
［発明の効果］
以上の記載から明らかなように、本発明の成形用金型を
用いて液状の付加反応型シリコーンゴムを射出成形する
ことにより、表面研削処理を施す必要がなく、外周面が
鏡面で溝底されトナーとの離型性に優れたシリコーンゴ
ムローラを製造することができる。[Effects of the Invention] As is clear from the above description, by injection molding liquid addition reaction type silicone rubber using the molding mold of the present invention, there is no need to perform surface grinding treatment, and the outer peripheral surface can be improved. It is possible to manufacture a silicone rubber roller that has a mirror surface and a grooved bottom and has excellent releasability from toner.
第１図は本発明の一実施例の要部拡大水平断面図、第２
図は本実施例の加熱用金型の水平断面図、第３図は別の
一例を示す斜視図である。
１・・・・・・・・・・・・加熱用金型３・・・・・・
・・・・・・中空円筒状金型４・・・・・・・・・・・
・ローラ芯金５・・・・・・・・・・・・キャップ
６・・・・・・・・・・・・射出注入路７・・・・・・
・・・・・・ランナー
第 ７ 図
第２図
第３図FIG. 1 is an enlarged horizontal cross-sectional view of the main part of one embodiment of the present invention, and FIG.
The figure is a horizontal sectional view of the heating mold of this embodiment, and FIG. 3 is a perspective view showing another example. 1...Heating mold 3...
・・・・・・Hollow cylindrical mold 4・・・・・・・・・・・・
・Roller core metal 5... Cap 6... Injection injection path 7...
...Runner Figure 7 Figure 2 Figure 3
Claims (1)
ヤビテイ内に、内周面が鏡面に仕上げられかつ内部にロ
ーラ芯金が同心的に装着された中空円筒状金型を設置す
るとともに、前記中空円筒状金型の両端にそれぞれ前記
ローラ芯金を支持するキヤツプを嵌着し、かつ前記中空
円筒状金型の片端とキヤツプとの間に内部に連通するシ
リコーンゴムの射出注入路を形成してなることを特徴と
するシリコーンゴムローラの射出成形用金型。(1) A hollow cylindrical mold having a mirror-finished inner circumferential surface and a roller core metal installed concentrically inside the heating mold is installed in the heating mold having a cylindrical cavity, and A cap that supports the roller core metal is fitted to each end of the hollow cylindrical mold, and an injection injection path for silicone rubber that communicates with the inside is formed between one end of the hollow cylindrical mold and the cap. An injection mold for silicone rubber rollers.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP59168599A JPH069836B2 (en) | 1984-08-11 | 1984-08-11 | Mold for injection molding of silicone rubber roller |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP59168599A JPH069836B2 (en) | 1984-08-11 | 1984-08-11 | Mold for injection molding of silicone rubber roller |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS6147226A true JPS6147226A (en) | 1986-03-07 |
| JPH069836B2 JPH069836B2 (en) | 1994-02-09 |
Family
ID=15871038
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP59168599A Expired - Lifetime JPH069836B2 (en) | 1984-08-11 | 1984-08-11 | Mold for injection molding of silicone rubber roller |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH069836B2 (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS63208889A (en) * | 1987-02-25 | 1988-08-30 | Toshiba Silicone Co Ltd | Fixing roll |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS58193135A (en) * | 1982-05-07 | 1983-11-10 | Fuji Xerox Co Ltd | Manufacture of elastomer roll |
| JPS5949956A (en) * | 1982-09-15 | 1984-03-22 | Tokai Kogyo Kk | Manufacture of rubber roll having nylon film on surface |
| JPS6053133A (en) * | 1983-09-02 | 1985-03-26 | 油田 信一 | Ultrasonic diagnostic apparatus |
-
1984
- 1984-08-11 JP JP59168599A patent/JPH069836B2/en not_active Expired - Lifetime
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS58193135A (en) * | 1982-05-07 | 1983-11-10 | Fuji Xerox Co Ltd | Manufacture of elastomer roll |
| JPS5949956A (en) * | 1982-09-15 | 1984-03-22 | Tokai Kogyo Kk | Manufacture of rubber roll having nylon film on surface |
| JPS6053133A (en) * | 1983-09-02 | 1985-03-26 | 油田 信一 | Ultrasonic diagnostic apparatus |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS63208889A (en) * | 1987-02-25 | 1988-08-30 | Toshiba Silicone Co Ltd | Fixing roll |
Also Published As
| Publication number | Publication date |
|---|---|
| JPH069836B2 (en) | 1994-02-09 |
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