CN1690879A - Charge roller forming device - Google Patents
Charge roller forming device Download PDFInfo
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- CN1690879A CN1690879A CN 200410027078 CN200410027078A CN1690879A CN 1690879 A CN1690879 A CN 1690879A CN 200410027078 CN200410027078 CN 200410027078 CN 200410027078 A CN200410027078 A CN 200410027078A CN 1690879 A CN1690879 A CN 1690879A
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- charging roller
- main body
- rubber
- shaped device
- charge roller
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Abstract
The charge roller shaper concerns special set to parts of electrophotography development device. Use main body of pipe-shaped with two ends opened, whose diameter of inner cavity is larger than outside diameter of charge roller; set double end shields detachable on two ends, the center of end shield has axis hole shared axis line with main body; the main body is a seamless metal pipe, its inner cavity be coated with high temperature-resistant nonmetals material layer with low surface free energy, diameter of inner cavity with coated layer is same to outside diameter of charge roller. This device can increase product efficiency of charge roller and rate of products meeting standards.
Description
Technical field
The present invention relates to the shaped device of the special tooling of electrophotographic image forming parts, particularly charging roller.
Background technology
Such as the equipment of employing electrophotographic image forming principles such as laser printer, facsimile recorder, duplicating machine, the process that images in medium is all finished by the steps such as electricity, development, transfer printing, photographic fixing of charging, expose, disappear.Usually in equipment, adopt the developing apparatus that to roll over dress, image forming course is as follows, at first photosensitive drum surface is charged, form the electric charge that one deck is even and current potential is suitable, afterwards exposure at photosensitive drum surface by a charging roller, photosensitive drum surface exposure position electric charge disappears, form an electrostatic latent image, provide carbon dust by the developer roll that closes on it again, electrostatic latent image is transformed into a visual picture, through transfer printing, photographic fixing, visual picture is fixed up on recording mediums such as printer paper afterwards.
The parts that relate in image quality and the said process are all relevant, and the quality quality of charging roller also is the key factor that guarantees image quality, and its technical indicator to photosensitive drum charging then depends on its structure.Charging roller has such structure usually, and the centre is an electric conductivity good metal plug, coats one deck conduction or semiconductive rubber elastic layer in the metal mandrel outside.If rubber elastic layer is a solid construction, it is better to be used for the low speed imaging device, and for high speed imaging equipment, then can in imaging process, produce very big noise, in addition, its wearing and tearing to photosensitive drum surface are very big, and rubber elastic layer adopts the charging roller of foaming structure can solve above-mentioned noise and wear problem.
The charging roller that has foaming structure for rubber elastic layer, moulding can be adopted extrusion molding, at first that materials such as rubber is mixing evenly, it is extruded by tubulose mouth mould by Rubber Extruder, carry out sulfur foam then, form the rubber tube of a foaming, rubber tube with foaming cuts into designated length again, metal mandrel is fixed in the bipeltate pipe, also must just can make charging roller afterwards, need the expensive time owing to the bipeltate pipe is polished, simultaneously by operations such as polishings, in bruting process, the rubber tube of foaming is yielding, and the charging roller size is difficult to control, and the bipeltate pipe after the process polishing is an open-celled structure, also need to apply external coating at bipeltate pipe overcoat one plastics or rubber tube.Thereby adopting this method for processing forming quite complicated, production efficiency is very low.
Also can adopt compression molding method to come processing and forming, be coated on the metal mandrel after compounding rubber is even, it is in the shaping mold cavity of two valve structures that the metal mandrel that will coat rubber layer again is placed into, sulfur foam is carried out in heating, the rubber rollers that foaming is good is taken out from shaping mold cavity, need the rubber rollers of this foaming be polished equally, and the rubber elastic layer after the polishing is an open-celled structure, need to apply external coating at bipeltate pipe overcoat one plastics or rubber tube.Adopt this method for processing forming, efficient is higher slightly than extrusion molding.
Chinese patent CN1298124A discloses a kind of shaped device of charging roller, it adopts some very low macromolecular materials of temperature conductivity to make the mould of charging roller, these high molecular polymers comprise teflon, polyimide, polyamide and polypropylene sulfide etc., mould adopts two lobe mode configurations, and the sealing moulding die cavity is come with stopper in two ends.The metal mandrel that has coated rubber layer is put in the die cavity of this mould, adopt hot air to carry out sulfur foam, can make the top layer and be the solid rubber layer and internal layer is the charging roller of foaming rubber layer, this charging roller need not apply external coating, promptly obtains the finished product of charging roller.Adopt this method to produce charging roller, highly efficient in productivity.But because this method is for ease of the demoulding, mould structure is the structure of two lobe moulds, and there is suture line in the die cavity that two lobe moulds are constituted during matched moulds, not high as machining precision, then be easy on the surface of the solid rubber layer of charging roller, produce burr, therefore, also need deburring is carried out on the surface of charging roller.In addition, it adopts macromolecular material making moulds such as polytetrafluoroethylplastic plastic, because the easy creeps of macromolecular material such as polytetrafluoroethylplastic plastics, the size of mould cavity changes easily, cause the size instability of the charging roller of moulding, the product qualified rate of charging roller is lower.In addition, when charging roller carries out sulfur foam in heating, the mould of being made by macromolecular materials such as polytetrafluoroethylplastic plastics must stand the high temperature of long period in the dry type heating furnace, also cause the mould distortion easily, reduce the serviceable life of mould, this also easily makes the qualification rate of charging roller of institute's moulding very low.
Summary of the invention
The purpose of this invention is to provide a kind of shaped device new, that can improve efficiency of charge roller and product percent of pass.
For this reason, the shaped device that the present invention provides adopts the pipe shape main body of a both ends open, it has the inner chamber of a diameter greater than the charging roller external diameter, the a pair of end cap that removably is fixed in the main body both ends open, the end cap center has the axis hole with the main body coaxial line, main body is a seamless metal pipe, and inner chamber is covered with the low high temperature resistant non-metallic material bed of material of surface free energy, and the main body intracavity diameter that is added with coating is identical with the charging roller external diameter.
By above scheme as seen, it is to have adopted whole mould that shaped device main body that the present invention provides and prior art do not exist together, main body adopts metal tube, be difficult in the baking process, deformation taking place, charging roller surface after moulding also never has bad mold joint and produces, therefore, have compared with the prior art higher generation efficient, higher product percent of pass is also arranged simultaneously.In addition, for ease of the demoulding, apply liner at the metal tube inner chamber by high temperature resistant nonmetallic materials, make the inner lining surface free energy very low, the rubber elastic layer of charging roller is in the sulfur foam process, rubber elastic layer can not stick on the liner of shaping mold cavity, and charging roller can separate with shaping mold cavity easily after the sulfuration.Simultaneously, respectively dispose an end cap, be used for supporting the two ends of the metal mandrel that is coated with rubber elastic layer at the two ends of shaping mold cavity.
Description of drawings
Fig. 1 is an embodiment of the invention structural drawing;
Fig. 2 is the structural drawing before the embodiment rubber elastic layer sulfur foam;
Fig. 3 is the structural drawing behind the embodiment rubber elastic layer sulfur foam;
Fig. 4 is the A partial enlarged drawing of Fig. 2;
Fig. 5 is the B partial enlarged drawing of Fig. 3.
The invention will be further described below in conjunction with embodiment and accompanying drawing thereof.
Embodiment
Referring to Fig. 1, main body 1 is made of a stainless-steel tube 11 and the joint flange 13 and the inner chamber coating 12 thereof that are welded on two ends, and stainless-steel tube 11 intracavity diameters are greater than the charging roller external diameter, like this, add the thickness of coating 12 after, intracavity diameter is identical with the charging roller external diameter.Coating 12 adopts the low high temperature resistant nonmetallic materials manufacturing of surface free energy, and available these class plastics, elastomeric material and resin material have fluoroplastic, silicon rubber, fluororubber or fluorosioloxane rubber, organic siliconresin, fluororesin, fluorocarbon resin, silicones, modified organic silicone resin, modified fluorin resin etc.The two ends of main body are end caps 2,3, every end, and 2,3 have the flange 21,31 corresponding with flange 13, and the unthreaded hole 23,33 that cooperates with screw 14 is used to install fastening bolt in addition.Also have axis hole 22,32 on the end cap 2,3, axis hole 22,32 has one section d-axis identical with charging roller metal mandrel diameter, and with main body 1 inner chamber coaxial line, thereby assurance caoutchouc elasticity layer thickness is even.
Referring to Fig. 2, Fig. 4, with rubber, vulcanizing agent, gas-development agent and filler etc. mixing evenly after, evenly be coated on the metal mandrel 51, again metal mandrel 51 is put in the main body 1 of shaped device, two ends cover with end cap 2,3 and by the two ends of aforementioned axis hole 22,32 support metal plugs 51, end cap 2,3 and main body 1 usefulness bolt 4 are fastenedly connected.The foaming as yet of rubber elastic layer 52 this moment, therefore, itself and 12 of coatings maintain certain foaming space 6, again this shaped device are put into heating furnace and heat, the time that vulcanizing agent of selecting for use according to rubber layer and gas-development agent are determined heating-up temperature and heating.
Referring to Fig. 3, Fig. 5, in heating process, rubber elastic layer 52 carries out sulfur foam, foaming back rubber is full of main body 1 inner chamber, occupies aforementioned foaming space 6, because main body 1 inner chamber coating 12 is made of materials such as fluoroplastic, silicon rubber, fluororubber, fluorosioloxane rubber, organic siliconresin, fluororesin, fluorocarbon resin, silicones, modified organic silicone resin, modified fluorin resins, surface energy is low, can form hole-closing structure after rubber elastic layer 52 foaming, closed pore foaming layer smooth surface, and can the good demoulding.
Technical conceive of the present invention also be can't help the foregoing description and is limited, and for example can also make the fast-connection fixing mechanism that adopts other between end cap and main body, further to enhance productivity.
Claims (5)
1, the charging roller shaped device comprises
The pipe shape main body of one both ends open, it has the inner chamber of a diameter greater than the charging roller external diameter;
The a pair of end cap that removably is fixed in the main body both ends open, the end cap center has the axis hole with the main body coaxial line;
It is characterized in that:
Main body is a seamless metal pipe, and inner chamber is covered with the low high temperature resistant non-metallic material bed of material of surface free energy;
The main body intracavity diameter that is added with behind the coating is identical with the charging roller external diameter.
2, charging roller shaped device according to claim 1 is characterized in that:
Described high temperature resistant nonmetallic materials are high-temperature resistance plastice or high-temperature resistant rubber or fire resistant resin.
3, charging roller shaped device according to claim 2 is characterized in that:
Described high-temperature resistance plastice is fluoroplastic.
4, charging roller shaped device according to claim 2 is characterized in that:
Described high-temperature resistant rubber is silicon rubber or fluororubber or fluorosioloxane rubber.
5, charging roller shaped device according to claim 2 is characterized in that:
Described fire resistant resin is organic siliconresin or fluororesin or fluorocarbon resin or silicones or modified organic silicone resin or modified fluorin resin.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200410027078 CN1690879A (en) | 2004-04-29 | 2004-04-29 | Charge roller forming device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200410027078 CN1690879A (en) | 2004-04-29 | 2004-04-29 | Charge roller forming device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN1690879A true CN1690879A (en) | 2005-11-02 |
Family
ID=35346375
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 200410027078 Pending CN1690879A (en) | 2004-04-29 | 2004-04-29 | Charge roller forming device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN1690879A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102580905A (en) * | 2012-02-15 | 2012-07-18 | 德州华源生态科技有限公司 | Method for processing conductive coatings of drawing and roving rubber rollers |
| CN109624180A (en) * | 2018-12-26 | 2019-04-16 | 平田橡塑五金制品（深圳）有限公司 | A kind of preparation method of composite foamed gum cover and the intake roller of printer |
| CN113334474A (en) * | 2021-07-30 | 2021-09-03 | 四川凯力威科技股份有限公司 | Roller barrel |
-
2004
- 2004-04-29 CN CN 200410027078 patent/CN1690879A/en active Pending
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102580905A (en) * | 2012-02-15 | 2012-07-18 | 德州华源生态科技有限公司 | Method for processing conductive coatings of drawing and roving rubber rollers |
| CN109624180A (en) * | 2018-12-26 | 2019-04-16 | 平田橡塑五金制品（深圳）有限公司 | A kind of preparation method of composite foamed gum cover and the intake roller of printer |
| CN113334474A (en) * | 2021-07-30 | 2021-09-03 | 四川凯力威科技股份有限公司 | Roller barrel |
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