JP2008087439A - Molding tool and manufacturing method of roller - Google Patents
Molding tool and manufacturing method of roller Download PDFInfo
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- JP2008087439A JP2008087439A JP2006274046A JP2006274046A JP2008087439A JP 2008087439 A JP2008087439 A JP 2008087439A JP 2006274046 A JP2006274046 A JP 2006274046A JP 2006274046 A JP2006274046 A JP 2006274046A JP 2008087439 A JP2008087439 A JP 2008087439A
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Abstract
Description
本発明は発泡ローラー成型時に使用する成型冶具、及びローラー製造方法に関する。詳しくは、複写機、レーザープリンタ、ファクシミリ等の電子写真装置や静電記録装置に使用される円筒状のスポンジ材と芯材からなる発泡ローラー成型時に使用する成型冶具、及びローラー製造方法に関する。 The present invention relates to a molding jig used at the time of molding a foaming roller, and a roller manufacturing method. More specifically, the present invention relates to a molding jig used in molding a foaming roller made of a cylindrical sponge material and a core material used in an electrophotographic apparatus such as a copying machine, a laser printer, a facsimile machine, or an electrostatic recording apparatus, and a roller manufacturing method.
従来、発泡ローラーの成型は、パイプ金型を使用し、円筒形状の穴を有する熱板もしくは加熱された成型冶具に該パイプ金型を挿入する、又は半円でくり抜かれた金属片を対に配置し該パイプ金型を挟みこんで加熱し成型する方法を用いていた。 Conventionally, foaming rollers are molded by using a pipe mold, and the pipe mold is inserted into a hot plate having a cylindrical hole or a heated molding jig, or a pair of semi-circular metal pieces is paired. A method of placing, heating and molding the pipe mold is used.
従来の方法において用いられたローラー成型冶具を、図２を参照して説明する。図２（ａ）で示されているのは、パイプ金型２’の外径より大きい穴加工を施した成型冶具本体１にパイプ金型２’を挿入するタイプの成型冶具である。図２（ｂ）で示されているのは、成型冶具本体１を掘り込み加工し、可動部１１を設置することでパイプ金型２’を挟み込むタイプの成型冶具である。 The roller molding jig used in the conventional method will be described with reference to FIG. FIG. 2A shows a molding jig of a type in which a pipe mold 2 'is inserted into a molding jig main body 1 having a hole machining larger than the outer diameter of the pipe mold 2'. FIG. 2B shows a molding jig of a type in which the molding jig body 1 is dug and a movable part 11 is installed to sandwich the pipe mold 2 ′.
しかしながら上述した方法では、パイプ金型を熱盤もしくは成型冶具に出し入れする観点から、金型や成型冶具の剛性を強くすることが求められる。そのために金型や成型冶具が大きくなり、従ってそれらを搬送する装置も巨大化する傾向があった。また、温度分布の安定性や昇温時間が長い等の課題もあった。 However, in the above-described method, it is required to increase the rigidity of the mold and the molding jig from the viewpoint of taking the pipe mold into and out of the hot platen or the molding jig. For this reason, molds and molding jigs have increased in size, and therefore there has been a tendency to enlarge the apparatus for conveying them. In addition, there are problems such as stability of temperature distribution and long heating time.
具体的に説明すると、図２（ａ）では、パイプ金型２’を出し入れする時の成型冶具本体１との磨耗対策から、成型冶具本体１のパイプ金型２’挿入用の穴径をパイプ金型２’外径よりも大きくしてある。これにより成型冶具１とパイプ金型２’の接触面積が減るため、効率的に加熱を行うことが困難であった。図２（ｂ）では、パイプ金型２’を成型冶具可動部１１により挟み込むため、効率的に加熱出来る反面、可動部１１の可動スペースを確保することが求められる。そのために、成型冶具１が大きくなってしまう欠点があった。また、図２（ａ）又は（ｂ）のどちらにしても、パイプ金型２’を出し入れするために強度を上げることが求められ、それによってパイプ金型２’の肉厚が厚くなり、更には成型冶具本体１が大きくなった。 Specifically, in FIG. 2 (a), the diameter of the hole for inserting the pipe mold 2 'of the molding jig body 1 is determined from the wear countermeasure with the molding jig body 1 when the pipe mold 2' is inserted and removed. The mold 2 'is larger than the outer diameter. As a result, the contact area between the forming jig 1 and the pipe mold 2 ′ is reduced, and it is difficult to efficiently perform heating. In FIG. 2B, the pipe mold 2 ′ is sandwiched between the molding jig movable parts 11, so that it can be efficiently heated, but it is required to secure a movable space of the movable part 11. For this reason, there is a drawback that the molding jig 1 becomes large. Further, in either case of FIG. 2 (a) or (b), it is required to increase the strength in order to insert and remove the pipe mold 2 ′, thereby increasing the thickness of the pipe mold 2 ′. The molding jig body 1 has become larger.
本発明は、上述の課題を解決し、小型・軽量の成型冶具を提供することによって、安定した発泡ローラー成型の実現を目的とする。 An object of the present invention is to achieve stable foam roller molding by solving the above-described problems and providing a compact and lightweight molding jig.
本発明は、ローラー形状をしたキャビティを有し、且つ芯材を支持する少なくとも２つの駒が両端に取り付けられたパイプ金型と、該パイプ金型の断面形状を有する少なくとも１つの穴を備え、且つ該穴に該パイプ金型が挿入される成型冶具本体と、を有し、該パイプ金型が該成型冶具本体に少なくとも２つ組み込まれていることで、ローラーを多数個取り出すことが出来る、芯材とゴム材で構成され加熱硬化して成型されるローラーの成型冶具であって、該パイプ金型は、該ローラ成型冶具本体の該穴に嵌め合い挿入して固定されることを特徴とする。 The present invention comprises a pipe mold having a roller-shaped cavity and at least two pieces attached to both ends for supporting the core material, and at least one hole having a cross-sectional shape of the pipe mold, And a molding jig body into which the pipe mold is inserted into the hole, and by incorporating at least two pipe molds into the molding jig body, a large number of rollers can be taken out. A roller molding jig composed of a core material and a rubber material and molded by heating and curing, wherein the pipe mold is fitted and inserted into the hole of the roller molding jig body and fixed. To do.
また、本発明は、ローラーの成型冶具内に挿入されたパイプ金型内部に芯材を設置し、駒によって該芯材を固定する第１工程と、該芯材が固定された該成型冶具を予熱する第２工程と、該パイプ金型内に発泡材料を注入する第３工程と、該パイプ金型内で発泡した該発泡材料を加熱硬化し、該パイプ金型より脱型する第４工程と、を有するローラーの製造方法であって、該成型冶具には、該パイプ金型が嵌め合い挿入で取り付けられていることを特徴とする。 Further, the present invention provides a first step of installing a core material inside a pipe mold inserted into a molding jig of a roller and fixing the core material with a piece, and the molding jig to which the core material is fixed. A second step of preheating, a third step of injecting a foam material into the pipe mold, and a fourth step of heat-curing the foamed material foamed in the pipe mold and demolding from the pipe mold A method of manufacturing a roller having the above-described method, wherein the pipe mold is fitted and attached to the molding jig.
本発明に従うことで、成型冶具が小型・軽量化し、それによって装置全体を小型化することが出来る。また、成型冶具の温度分布を良くすることで、昇温時間の短縮をすることが出来る。更には、成型冶具の温度が安定しているため、成型されるローラーの物性を安定させることが出来る。 By following the present invention, the molding jig can be reduced in size and weight, thereby reducing the size of the entire apparatus. Moreover, the temperature raising time can be shortened by improving the temperature distribution of the forming jig. Furthermore, since the temperature of the molding jig is stable, the physical properties of the molded roller can be stabilized.
以下、本発明に係るローラー成型冶具及び発泡ローラーの実施の形態を、図面を参照しながら詳細に説明する。 Hereinafter, embodiments of a roller molding jig and a foaming roller according to the present invention will be described in detail with reference to the drawings.
図１は本発明のローラー成型冶具の概略図である。図１（ａ）は成型冶具の本体に穴加工をして、パイプ金型を挿入・固定した場合の、図１（ｂ）は成型冶具の本体に直接ローラーキャビティとなる穴を加工した場合の成型冶具断面の概略図である。 FIG. 1 is a schematic view of a roller molding jig of the present invention. FIG. 1A shows a case where a hole is drilled in the main body of the molding jig, and a pipe mold is inserted and fixed. FIG. 1B shows a case where a hole serving as a roller cavity is directly machined in the main body of the molding jig. It is the schematic of a forming jig cross section.
図１（ａ）の場合、成型冶具の本体１に穴加工し、ローラーキャビティを有した、肉厚が内径の７．５から４５％のパイプ金型２を隙間嵌めにて該成型冶具本体１に挿入し固定する。パイプ金型２の長手方向と垂直な平面上におけるパイプ金型２の肉厚が、パイプ内径の７．５％より小さいの場合では必要強度を維持することが困難であり、４５％より大きい場合では該パイプ金型及び該成型冶具本体が巨大化してしまう。そのため、パイプ金型２の肉厚はパイプ内径の７．５から４５％の範囲にあることが好ましい。また、パイプ金型２を成型冶具本体１に挿入及び固定するときの嵌め合い公差は、ＪＩＳ規格でＨ７ｇ７等級以上とする。嵌め合い公差のＪＩＳ規格の定義は「ＪＩＳＢ０４０１」による。嵌め合い公差がＪＩＳ規格でＨ７ｇ７等級より小さい場合、該成型冶具本体1と該パイプ金型２の隙間が大きくなるため、該パイプ金型２の加熱が十分に出来ず、温度ムラが生じやすい。Ｈ７ｇ７等級以上とすることで、該パイプ金型２と該成型冶具本体１の隙間を減らし、効率よく加熱することが出来る。また、成型冶具本体１が補強の役割を果たし、パイプ金型２に関して薄肉でありながら十分な必要強度を確保出来る。 In the case of FIG. 1 (a), a hole is formed in the main body 1 of the molding jig, and a pipe mold 2 having a roller cavity and having a wall thickness of 7.5 to 45% of the inner diameter is fitted into the molding jig main body 1 by clearance fitting. Insert into and fix. When the thickness of the pipe mold 2 on a plane perpendicular to the longitudinal direction of the pipe mold 2 is less than 7.5% of the inner diameter of the pipe, it is difficult to maintain the required strength, and when the thickness is greater than 45% Then, the pipe mold and the molding jig main body become enormous. Therefore, the thickness of the pipe mold 2 is preferably in the range of 7.5 to 45% of the pipe inner diameter. Further, the fitting tolerance when the pipe mold 2 is inserted and fixed to the molding jig main body 1 is H7g7 grade or more in JIS standard. The definition of the JIS standard for fit tolerance is based on “JISB0401”. When the fitting tolerance is smaller than the H7g7 grade according to the JIS standard, the gap between the molding jig main body 1 and the pipe mold 2 becomes large, so that the pipe mold 2 cannot be heated sufficiently, and temperature unevenness is likely to occur. By setting it as H7g7 grade or more, the clearance gap between this pipe metal mold | die 2 and this shaping | molding jig main body 1 can be reduced, and it can heat efficiently. Moreover, the molding jig main body 1 plays a role of reinforcement, and a sufficient necessary strength can be ensured while being thin with respect to the pipe mold 2.
図１（ｂ）の場合、少なくともパイプ金型の肉厚分、成型冶具本体１の幅寸法を小さく出来る。成型冶具本体１の長手方向と垂直な平面上における成型冶具本体１の肉厚は、材質及び大きさ、該成型冶具の使い方にもよるが、強度を考慮して選定する必要があり、一般的には２ｍｍ以上とすることが好ましい。 In the case of FIG. 1B, at least the thickness of the pipe mold and the width dimension of the forming jig body 1 can be reduced. The thickness of the molding jig body 1 on a plane perpendicular to the longitudinal direction of the molding jig body 1 depends on the material and size, and how to use the molding jig, but it is necessary to select it in consideration of strength. Is preferably 2 mm or more.
図１（ａ）又は（ｂ）のどちらにしても、成型冶具１が小型・軽量化出来ることから昇温時間の短縮や温度分布の安定を得ることが出来る。また、成型冶具１の搬送装置も小型化出来る。更には、温度分布が安定していることから、成型される発泡ローラーを常に安定して成型することが出来る。 In either case of FIG. 1 (a) or (b), the molding jig 1 can be reduced in size and weight, so that the heating time can be shortened and the temperature distribution can be stabilized. Moreover, the conveyance apparatus of the shaping jig 1 can also be reduced in size. Furthermore, since the temperature distribution is stable, the foaming roller to be molded can always be stably molded.
以下、本発明による実施例を説明するが、本発明はこれら実施例のみに限定されるものではない。 Examples of the present invention will be described below, but the present invention is not limited to these examples.
製作したローラー成型冶具は、幅１５０ｍｍ×縦４００ｍｍ×高さ３４ｍｍの直方体（一部凹凸形状あり）の成型冶具本体にパイプ金型挿入用のφ２０Ｈ７（ＪＩＳ）穴を４箇所加工したものである（４個取り冶具仕様である）。そして、パイプ金型（外径φ２０ｇ６（ＪＩＳ）ｍｍ、内径φ１３ｍｍ、長さ２５０ｍｍ）の両端に芯材を支持する駒を設置するためにテーパー加工を施し、該成型冶具に挿入し、止めネジにより固定した。該パイプ金型の肉厚最小部は１ｍｍである。成型冶具本体のパイプ金型挿入用穴とパイプ金型との嵌め合い公差はＨ７ｇ６（ＪＩＳ）とした。成型冶具本体の材質はアルミニウムＡ２０１７（一部異材質）を使用した。パイプ金型の材質はＳＵＳを使用した。 The produced roller molding jig is obtained by processing four φ20H7 (JIS) holes for pipe mold insertion into a molding jig main body of 150 mm width × 400 mm length × 34 mm height (partially uneven shape) ( It is a four-piece jig specification). Then, in order to place a piece to support the core material on both ends of the pipe mold (outer diameter φ20g6 (JIS) mm, inner diameter φ13 mm, length 250 mm), it is tapered and inserted into the molding jig, Fixed. The minimum thickness portion of the pipe mold is 1 mm. The fitting tolerance between the pipe mold insertion hole of the molding jig body and the pipe mold was H7g6 (JIS). Aluminum A2017 (partly different material) was used as the material of the forming jig body. The material of the pipe mold was SUS.
従来のパイプ金型と比べると、肉厚が約２５％減であり、質量では５５％減となった。成型冶具本体では従来と比べ質量で６５％減となり、大幅な小型・軽量化を実現した。また、該成型冶具の搬送機構に至っても成型冶具の小型・軽量に伴い、小型化することが出来るため、装置全体としての小型・低コスト化を実現した。 Compared to the conventional pipe mold, the wall thickness was reduced by about 25%, and the mass was reduced by 55%. The molding jig body has a mass reduction of 65% compared to the conventional one, realizing a significant reduction in size and weight. In addition, since the molding jig can be reduced in size and weight even when it reaches the conveyance mechanism of the molding jig, the entire apparatus can be reduced in size and cost.
温度特性については、パイプ金型を成型冶具本体と嵌め合い嵌合にしているため、効率良く熱を伝えることが出来、従来タイプ（図２ｂ）と比べて昇温時間を６０％短縮することが出来た（常温２５℃から６０℃までの昇温時間にて比較）。これにより装置立上げ時間が大幅に短縮出来るとともに、成型冶具の加熱（予熱）時間を短縮することが出来るため、装置の加熱ユニットを減らすことができた。 As for the temperature characteristics, the pipe mold is fitted and fitted to the main body of the molding jig, so that heat can be transferred efficiently and the heating time can be shortened by 60% compared to the conventional type (Fig. 2b). It was completed (comparison with the temperature rising time from room temperature 25 degreeC to 60 degreeC). As a result, the apparatus start-up time can be greatly shortened, and the heating (preheating) time of the forming jig can be shortened, so that the heating unit of the apparatus can be reduced.
次に、成型する発泡ローラーの材料と成形条件、製造の手順を示す。 Next, the material of the foaming roller to be molded, molding conditions, and the production procedure will be shown.
図３に示す形状をした発泡ローラーを成型した。成型した発泡ローラーの芯材部はφ５ｍｍ、全長２６０ｍｍであり、発泡ゴム部はφ１３ｍｍ、全長２２０ｍｍである。 A foaming roller having the shape shown in FIG. 3 was molded. The core part of the molded foam roller has a diameter of 5 mm and a total length of 260 mm, and the foamed rubber part has a diameter of 13 mm and a total length of 220 mm.
発泡ゴム部の材料であるが、材料混合ポリオールとして、ＦＡ−９０８を１００重量部、ジエタノールアミンを０．５重量部、Ｌ５３６６を１重量部、ＴｏｙｏＣａｔ−ＥＴを０．１重量部、ＴＥＤＡ−Ｌ３３を０．５重量部、水（発泡剤）２重量部を混合した。前記ＦＡ−９０８は、三洋化成株式会社製ポリエーテルポリオールである。前記Ｌ５３６６は、日本ユニカー株式会社製シリコーン系整泡剤である。前記ＴｏｙｏＣａｔ−ＥＴは、東ソー株式会社製第３級アミン触媒である。前記ＴＥＤＡ−Ｌ３３は、東ソー株式会社製第３級アミン触媒である。その後、Ｔ８０（三井武田ケミカル株式会社製イソシアネート、ＮＣＯ％＝４８）２９．５重量部、Ｍ２００（三井武田ケミカル株式会社製イソシアネート、ＮＣＯ％＝３１）７．４部とをＮＣＯインデックス１００となるように混合攪拌したものを発泡材料とした。 Although it is a material of the foamed rubber part, as a mixed polyol, 100 parts by weight of FA-908, 0.5 parts by weight of diethanolamine, 1 part by weight of L5366, 0.1 part by weight of ToyoCat-ET, and TEDA-L33 0.5 parts by weight and 2 parts by weight of water (foaming agent) were mixed. The FA-908 is a polyether polyol manufactured by Sanyo Chemical Co., Ltd. The L5366 is a silicone-based foam stabilizer manufactured by Nippon Unicar Co., Ltd. The ToyoCat-ET is a tertiary amine catalyst manufactured by Tosoh Corporation. The TEDA-L33 is a tertiary amine catalyst manufactured by Tosoh Corporation. Then, TCO (Mitsui Takeda Chemical Co., Ltd. isocyanate, NCO% = 48) 29.5 parts by weight, M200 (Mitsui Takeda Chemical Co., Ltd. isocyanate, NCO% = 31) 7.4 parts and NCO index 100 A foamed material was prepared by mixing and stirring.
上記の成型冶具内のパイプ金型内面部にシリコンオイル離型剤を塗布し、該パイプ金型内に該芯材を設置し、該パイプ金型両端部にて該芯材を把持する駒により該芯材を固定した。この状態の該成型冶具を６５℃に温度制御された熱盤にて挟み込み予熱した。その後、混合攪拌した該発泡材料を６５℃に予熱した液受けカップに吐出し、該成型冶具と組付けた。その際、液受けカップに吐出した上記成型材料が発泡材料であることから、充填口を介して自然発泡によりパイプ金型内は上記材料で充填される。その後、１０分間、６５℃に温度制御された熱盤において硬化させ、脱型し、発泡ローラーを得た。 Applying a silicone oil release agent to the inner surface of the pipe mold in the molding jig, installing the core material in the pipe mold, and using a piece that holds the core material at both ends of the pipe mold The core material was fixed. The molding jig in this state was sandwiched by a hot plate controlled to 65 ° C. and preheated. Thereafter, the foamed material mixed and stirred was discharged into a liquid receiving cup preheated to 65 ° C., and assembled with the molding jig. At that time, since the molding material discharged to the liquid receiving cup is a foam material, the inside of the pipe mold is filled with the material by natural foaming through the filling port. Then, it was cured on a hot plate controlled at 65 ° C. for 10 minutes, and demolded to obtain a foaming roller.
本実施例の成型冶具を使用することで、熱が均一にパイプ金型に伝わるため、発泡ゴム部の硬化が均一及び良好となり、セルが均一で発泡ゴム部の歪みが少ない発泡ローラーを得ることができた。 By using the molding jig of this embodiment, heat is uniformly transmitted to the pipe mold, so that the foamed rubber part is uniformly and well cured, and the foamed roller is uniform and the foamed rubber part is less distorted. I was able to.
１ 本発明のローラー成型冶具本体
２ 本発明のパイプ金型
２’ 従来のパイプ金型
１１ 従来のローラー成型冶具（可動部）
２０ 発泡ゴム
２１ 芯材
DESCRIPTION OF SYMBOLS 1 Roller molding jig body 2 of the present invention Pipe mold 2 ′ of the present invention Conventional pipe mold 11 Conventional roller molding jig (movable part)
20 Foam rubber 21 Core material
Claims (9)
該パイプ金型は、該ローラ成型冶具本体の該穴に嵌め合い挿入して固定されることを特徴とするローラー成型冶具。 A pipe mold having a roller-shaped cavity and having at least two pieces attached to both ends supporting the core material, and at least one hole having a cross-sectional shape of the pipe mold, and in the hole A molding jig body into which the pipe mold is inserted, and a core material and rubber from which a large number of rollers can be taken out by incorporating at least two pipe molds into the molding jig body. A roller forming jig that is made of a material and heat-cured and molded.
The pipe mold is fitted and inserted into the hole of the roller molding jig main body, and is fixed.
該成型冶具には、該パイプ金型が嵌め合い挿入で取り付けられていることを特徴とするローラーの製造方法。 A first step of installing a core material inside a pipe mold inserted in a molding jig of a roller and fixing the core material with a piece; a second step of preheating the molding jig to which the core material is fixed; , A third step of injecting a foam material into the pipe mold, and a fourth step of heat-curing the foam material foamed in the pipe mold and demolding from the pipe mold. A manufacturing method comprising:
A method for producing a roller, characterized in that the pipe mold is fitted and fitted to the molding jig.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2006274046A JP2008087439A (en) | 2006-10-05 | 2006-10-05 | Molding tool and manufacturing method of roller |
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| JP2006274046A JP2008087439A (en) | 2006-10-05 | 2006-10-05 | Molding tool and manufacturing method of roller |
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| JP2008087439A true JP2008087439A (en) | 2008-04-17 |
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