CN1819879A - Aluminum pipe having excellent surface quality, method and apparatus for manufacturing the aluminum pipe, and photosenstive drum base body - Google Patents

Aluminum pipe having excellent surface quality, method and apparatus for manufacturing the aluminum pipe, and photosenstive drum base body Download PDF

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Publication number
CN1819879A
CN1819879A CNA038269813A CN03826981A CN1819879A CN 1819879 A CN1819879 A CN 1819879A CN A038269813 A CNA038269813 A CN A038269813A CN 03826981 A CN03826981 A CN 03826981A CN 1819879 A CN1819879 A CN 1819879A
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China
Prior art keywords
pipe
mentioned
aluminum pipe
extruding
manufacture method
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Granted
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CNA038269813A
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Chinese (zh)
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CN100446882C (en
Inventor
岩永晃治
后长毅
佐川邦广
百百阳一
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Resonac Holdings Corp
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Showa Denko KK
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Publication of CN1819879A publication Critical patent/CN1819879A/en
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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21C—MANUFACTURE OF METAL SHEETS, WIRE, RODS, TUBES OR PROFILES, OTHERWISE THAN BY ROLLING; AUXILIARY OPERATIONS USED IN CONNECTION WITH METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL
    • B21C1/00—Manufacture of metal sheets, metal wire, metal rods, metal tubes by drawing
    • B21C1/16—Metal drawing by machines or apparatus in which the drawing action is effected by other means than drums, e.g. by a longitudinally-moved carriage pulling or pushing the work or stock for making metal sheets, bars, or tubes
    • B21C1/22—Metal drawing by machines or apparatus in which the drawing action is effected by other means than drums, e.g. by a longitudinally-moved carriage pulling or pushing the work or stock for making metal sheets, bars, or tubes specially adapted for making tubular articles
    • B21C1/24—Metal drawing by machines or apparatus in which the drawing action is effected by other means than drums, e.g. by a longitudinally-moved carriage pulling or pushing the work or stock for making metal sheets, bars, or tubes specially adapted for making tubular articles by means of mandrels
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21C—MANUFACTURE OF METAL SHEETS, WIRE, RODS, TUBES OR PROFILES, OTHERWISE THAN BY ROLLING; AUXILIARY OPERATIONS USED IN CONNECTION WITH METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL
    • B21C23/00—Extruding metal; Impact extrusion
    • B21C23/02—Making uncoated products
    • B21C23/04—Making uncoated products by direct extrusion
    • B21C23/08—Making wire, bars, tubes
    • B21C23/085—Making tubes
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21C—MANUFACTURE OF METAL SHEETS, WIRE, RODS, TUBES OR PROFILES, OTHERWISE THAN BY ROLLING; AUXILIARY OPERATIONS USED IN CONNECTION WITH METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL
    • B21C25/00—Profiling tools for metal extruding
    • B21C25/02—Dies
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21C—MANUFACTURE OF METAL SHEETS, WIRE, RODS, TUBES OR PROFILES, OTHERWISE THAN BY ROLLING; AUXILIARY OPERATIONS USED IN CONNECTION WITH METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL
    • B21C3/00—Profiling tools for metal drawing; Combinations of dies and mandrels
    • B21C3/02—Dies; Selection of material therefor; Cleaning thereof
    • B21C3/04—Dies; Selection of material therefor; Cleaning thereof with non-adjustable section
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21C—MANUFACTURE OF METAL SHEETS, WIRE, RODS, TUBES OR PROFILES, OTHERWISE THAN BY ROLLING; AUXILIARY OPERATIONS USED IN CONNECTION WITH METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL
    • B21C3/00—Profiling tools for metal drawing; Combinations of dies and mandrels
    • B21C3/16—Mandrels; Mounting or adjusting same
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21D—WORKING OR PROCESSING OF SHEET METAL OR METAL TUBES, RODS OR PROFILES WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21D3/00—Straightening or restoring form of metal rods, metal tubes, metal profiles, or specific articles made therefrom, whether or not in combination with sheet metal parts
    • B21D3/02—Straightening or restoring form of metal rods, metal tubes, metal profiles, or specific articles made therefrom, whether or not in combination with sheet metal parts by rollers
    • B21D3/04—Straightening or restoring form of metal rods, metal tubes, metal profiles, or specific articles made therefrom, whether or not in combination with sheet metal parts by rollers arranged on axes skew to the path of the work
    • C—CHEMISTRY; METALLURGY
    • C11—ANIMAL OR VEGETABLE OILS, FATS, FATTY SUBSTANCES OR WAXES; FATTY ACIDS THEREFROM; DETERGENTS; CANDLES
    • C11D—DETERGENT COMPOSITIONS; USE OF SINGLE SUBSTANCES AS DETERGENTS; SOAP OR SOAP-MAKING; RESIN SOAPS; RECOVERY OF GLYCEROL
    • C11D7/00—Compositions of detergents based essentially on non-surface-active compounds
    • C11D7/22—Organic compounds
    • C11D7/24—Hydrocarbons
    • C11D2111/20—
    • C11D2111/46—
    • G—PHYSICS
    • G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
    • G03G—ELECTROGRAPHY; ELECTROPHOTOGRAPHY; MAGNETOGRAPHY
    • G03G2215/00—Apparatus for electrophotographic processes
    • G03G2215/00953—Electrographic recording members
    • G03G2215/00957—Compositions

Abstract

In a manufacturing method in which an aluminum bullet is extruded to obtain an extruded raw pipe 4 and then the extruded raw pipe 4 is subjected to a drawn process, the aluminum extruded raw pipe 4 is cut at a position within 10m from a discharge position M of an extruding die to obtain an aluminum extruded raw pipe 4 with a length of 10m or shorter, and the extruded raw pipe 4 is subjected to a drawing process. With this, an aluminum pipe excellent in surface quality having no surface defect such as white peeling can be manufactured at high manufacturing efficiency.

Description

Aluminum pipe that has excellent surface quality and manufacturing method and apparatus thereof and base of photoconductor drum
The application requires the patent application 2003-303334 of Japan number of submitting on August 27th, 2003 and the U.S. Provisional Application of submitting on September 3rd, 2003, and (denomination of invention is: the aluminum pipe that has excellent surface quality and its manufacture method and manufacturing installation and base of photoconductor drum (Aluinum Tube withExcellent Surface Quality, Method and Apparatus for Producing the Sameand Photosensitive Drum Substrate), applicant: Showa Denko K. K (SHOWADENKO K.K), the inventor: rock shakes forever controls (Koji IWANAGA), back long firm (TakeshiGOCHO), assistant river nation wide (Kunihiro SAGAWA), 100 sun one (Youichi MOMO), this provisional application does not obtain application number notice from USPO as yet) priority, its disclosure directly constitutes the part of the present patent application.
The expression of related application
The application according to united states patent law the 119th (e) (l), (denomination of invention is the U.S. Provisional Application that on September 3rd, 2003 was submitted to according to the 111st (b) regulation of united states patent law: the aluminum pipe that has excellent surface quality and its manufacture method and manufacturing installation and base of photoconductor drum (Aluminum Tubewith Excellent Surface Quality, Method and Apparatus for Producing theSame and Photosensitive Drum Substrate), applicant: Showa Denko K. K (SHOWA DENKO K.K), the inventor: rock shakes forever controls (Koji IWANAGA), back long firm (Takeshi GOCHO), assistant river nation wide (Kunihiro SAGAWA), 100 sun one (Youichi MOMO), this provisional application does not obtain the application number notice from USPO as yet), requiring the rights and interests of the applying date, is the application according to the 111st (a) regulation of united states patent law.
Technical field
The present invention relates to a kind of being applicable to well such as the aluminum pipe that has excellent surface quality of the photosensitive drums of electrophotograph apparatus such as duplicator, printer, facsimile machine and its manufacture method and the base of photoconductor drum that has excellent surface quality.
And in this manual, use term " aluminium " to be intended to comprise aluminium and aluminium alloy.
Background technology
As the aluminum pipe that the photosensitive drums of electrophotograph apparatus such as duplicator, printer, facsimile machine is used, wish that it compares the surface state near minute surface in nature.All the time, carry out mirror finish by aluminum pipe is carried out machining, but the adjustment of cutting tool and management are not easy, and, have and produce in enormous quantities disproportionate problem because operation needs skillfully.
So, will carry out the effective base of photoconductor drum of doing of aluminium drawing after the drawing processing, that be called the ED pipe to aluminium extruded ejection pipe just more in the last few years.Adopt following operation to make this ED pipe, at first the aluminum blank is extruded (extruding) to obtain aluminium extruded ejection pipe, after this is extruded the base pipe and be cut to specific length, the drawing processing that enforcement is used to improve surface characteristic to be obtaining the having stipulated aluminum pipe of specified diameter (external dimensions, inside dimension and wall thickness), and then cleans (opening clear 63-188422 communique with reference to the spy).
But in above-mentioned such aluminium drawing pipe of making, roughly along the drawing direction than very small elongated muscle shape blemish (hereinafter referred is " normal society ") such shown in the living Figure 14 optical microscope photograph of acred (among Figure 14, normal society from the central portion of photograph image to the right oblique upper extend).In the last few years, as the photosensitive drums of electrophotograph apparatus such as duplicator, printer, facsimile machine, requirement can realize excellent image quality, but can not adapt to this requirement fully by the aluminum pipe that has blemish such as above-mentioned normal society.In the aluminium drawing pipe that above-mentioned existing manufacture method obtained, the better quality goods pick-up rate that does not have blemish such as normal society just stock utilization is approximately 70%, thereby production efficiency is low.Thereby the exploitation that does not produce the manufacture method of blemish such as this normal society becomes the task of top priority.
Summary of the invention
In view of the foregoing, propose the present invention, the purpose of this invention is to provide a kind of manufacture method and manufacturing installation and aluminum pipe that has excellent surface quality and base of photoconductor drum of the aluminum pipe of can production efficiency making blemish such as not producing normal society well, having excellent surface quality.
By embodiments of the invention hereinafter described, other purpose of the present invention becomes clear.
To achieve these goals, the inventor studies the reason that normal society (blemish) produces.At first the inventor thinks that following factor may be the reason of normal society generation or the generation that influences normal society.
(i) influence (influence of impurity concentration etc.) of the composition of raw material blank variation
The (ii) deterioration of extrusion die or drawing die
The influence of the cooling means of the base pipe after (iii) extruding (air cooling, mist cold etc.)
(iv) deterioration, the foreign matter that transports the roller of extruding the base pipe paid
(dirt, the foreign matter of v) extruding the supporting acceptance division of base pipe are being paid
(the vi) influence of the change of drawing speed (instability)
(vii) the drawing deterioration, the foreign matter that add the lubricating oil that uses man-hour sneaked into
Be high above-mentioned each factor of normal society occurrence cause possibility for being interpreted as, whether to being that the reason that normal society takes place has been carried out meticulous investigation and research, above-mentioned (i)～(any factor is all irrelevant with the generation of normal society vii).So the inventor has carried out analyzing in more detail, having carried out various researchs for the reason that normal society takes place.As a result, according to from the extrusion die side towards extrude direction front order by light microscope to extrude extrude base pipe (about 50 meters of length) and observe after, conclude that the frequency that normal society takes place increases towards extruding the direction front.Just conclude in extrusion die side normal society incidence low.And can learn the reason that takes place as normal society, exist be positioned at the lip-deep felt mat of roller that the base pipe of just having extruded is transported fiber attached to the possibility on the base tube-surface.In order to confirm, deliberately the formation fiber with felt mat carries out drawing attached to extruding on the base pipe, observes the normal society defective identical with Figure 14, and thus, to adhere to be the reason that normal society produces to fiber as can be known.When felt mat time of contact of the base pipe of the condition of high temperature of just having extruded and roller was elongated, then fiber was hot sticky on the base tube-surface, if carry out drawing under this state, can estimate to produce the normal society that extends along the drawing direction as shown in figure 14 on tube-surface.According to above-mentioned a series of research and analysis result to a variety of causes, draw following conclusion, promptly in order to prevent the generation of normal society, should be in spue 10 meters of positions or the aluminium extruded ejection pipe of extruding is cut off of distance extrusion die with interior position, obtain length smaller or equal to 10 meters aluminium extruded ejection pipe.
That is, to achieve these goals, the invention provides following proposal.
(1) a kind of manufacture method of the aluminum pipe that has excellent surface quality, this method is after the aluminum blank being extruded acquisition aluminium extruded ejection pipe, carry out drawing processing and make aluminum pipe by this being extruded the base pipe, it is characterized in that:, this is extruded the base pipe for above-mentioned drawing processing apart from 10 meters of the positions or the above-mentioned aluminium extruded ejection pipe of extruding is cut off to obtain length smaller or equal to 10 meters aluminium extruded ejection pipe of spuing of squeezing extrusion die with interior position.
(2) a kind of manufacture method of the aluminum pipe that has excellent surface quality is characterized in that, comprising: the aluminum blank is extruded to obtain the operation of extruding of aluminium extruded ejection pipe; 10 meters of the positions or the above-mentioned aluminium extruded ejection pipe of extruding is cut off with interior position of spuing at the distance extrusion die obtain the cut-out operation of length smaller or equal to 10 meters aluminium extruded ejection pipe; With the aluminium extruded ejection pipe after the above-mentioned cut-out is carried out drawing processing to obtain the drawing procedure of aluminum pipe.
(3) as the manufacture method of the aluminum pipes that have excellent surface quality of preceding paragraph 1 or 2 records, the above-mentioned aluminium extruded ejection pipe of extruding is cut off with interior position in 10 meters of the positions of spuing of distance extrusion die, obtain length and be 1～6 meter aluminium extruded ejection pipe.
(4) as the manufacture method of the aluminum pipes that have excellent surface quality of preceding paragraph 1 or 2 records, the above-mentioned aluminium extruded ejection pipe of extruding is cut off with interior position in 7 meters of the positions of spuing of distance extrusion die, obtain length and be 2～5 meters aluminium extruded ejection pipe.
(5) as the manufacture method of the aluminum pipe that has excellent surface quality of each record in the preceding paragraph 1～4, when the backing roll that constitutes around the outer peripheral face that is bonded on roller core portion by the felt pan by the synthetic fibers manufacturing supports the above-mentioned aluminium extruded ejection pipe of extruding with it towards extruding the direction transportation.
(6) as the manufacture method of the aluminum pipe that has excellent surface quality of preceding paragraph 5 record, the main body that constitutes the fiber of above-mentioned felt pan is an aramid fibre.
(7) as the manufacture method of the aluminum pipe that has excellent surface quality of each record in the preceding paragraph 1～6, as above-mentioned aluminum blank, use comprises Mn:1.1～1.6% quality, Si: smaller or equal to 0.7% quality, Fe: smaller or equal to 0.8% quality, Cu:0.04～0.21% quality, Zn: smaller or equal to 0.11% quality, other composition is the blank that aluminium and inevitable impurity are formed.
(8) as the manufacture method of the aluminum pipe that has excellent surface quality of each record in the preceding paragraph 1～7, use following extrusion die to extrude, smaller or equal to 5 meters, and the circumferential center line average roughness Ra (Y) of this calibrating strap portion and the relation of extruding the center line average roughness Ra (X) of direction are set at Ra (Y)＜Ra (X) in the length L of extruding direction in the die bearing portion of the outside of the formation aluminium extruded ejection pipe in the described extrusion die.
(9) as the manufacture method of the aluminum pipe that has excellent surface quality of each record in the preceding paragraph 1～7, to adjust to Ry (maximum height) be that 5～30 microns extrusion die is extruded to the surface roughness of this calibrating strap portion when using calibrating strap portion to be formed by superhard material.
(10) as the manufacture method of the aluminum pipe that has excellent surface quality of each record in the preceding paragraph 1～9, the surface roughness Ry (maximum height) that is made progress by the aluminium extruded ejection Guan Zaizhou that above-mentioned cut-out obtained is 0.5～10 micron.
(11) as the manufacture method of the aluminum pipe that has excellent surface quality of each record in the preceding paragraph 1～10, aluminium extruded ejection pipe after making above-mentioned cut-out carries out drawing and adds man-hour the above-mentioned base pipe of extruding by carrying out drawing between drawing die and the drawing plug, to above-mentioned drawing die and the above-mentioned supplied viscosity of extruding between the base pipe smaller or equal to the lubricating oil of 200cst, and carry out drawing processing, make from above-mentioned extrude the base pipe to the reduced diameter rate of aluminum pipe smaller or equal to 30%, the basal area minification is more than or equal to 5%.
(12) as the manufacture method of the aluminum pipe that has excellent surface quality of each record in the preceding paragraph 1～11, aluminium extruded ejection pipe after making above-mentioned cut-out carries out drawing and adds man-hour the above-mentioned base pipe of extruding by carrying out drawing between drawing die and the drawing plug, as the bar that above-mentioned drawing plug is supported, use one or more cores that touch with the above-mentioned inner peripheral surface of extruding the base pipe to install and the bar of formation along this whole length of extruding the base pipe.
(13) as the manufacture method of the aluminum pipe that has excellent surface quality of preceding paragraph 12 record, on the outer peripheral face of above-mentioned core, form the groove parallel with axis.
(14) as the manufacture method of the aluminum pipe that has excellent surface quality of each record in the preceding paragraph 1～13, aluminium extruded ejection pipe after making above-mentioned cut-out carries out drawing and adds man-hour the above-mentioned base pipe of extruding by carrying out drawing between drawing die and the drawing plug, as above-mentioned drawing die, use the distortion cone angle to be set in 10～40 °, the length setting of calibrating strap portion mould 8～25 millimeters scopes, as above-mentioned drawing plug, use the distortion cone angle to be set in 6～10 °, the length setting of calibrating strap portion plug 1.5～3 millimeters scopes.
(15) as the manufacture method of the aluminum pipe that has excellent surface quality of each record in the preceding paragraph 1～14, by the surface microstructure of the aluminium extruded ejection pipe that above-mentioned cut-out obtained the average length of drawing direction for more than or equal to 60 microns, by carrying out drawing processing so that this crystal grain becomes more than or equal to 1.3 times mode in the average length of drawing direction, obtain surface microstructure surpasses 300 microns in the average length of drawing direction aluminum pipe.
(16), after by the punching press process of chopping oral area by above-mentioned drawing processing institute acquisition aluminum pipe being excised, use roller straightener that this aluminum pipe is carried out the warpage aligning as the manufacture method of the aluminum pipe that has excellent surface quality of each record in the preceding paragraph 1～15.
(17), after drawing, more than or equal to 20 solvent the aluminum pipe that is obtained by above-mentioned drawing processing was cleaned with KB (kauri gum butanols) value with interior in 3 days as the manufacture method of the aluminum pipe that has excellent surface quality of each record in the preceding paragraph 1～16.
(18) as the manufacture method of the aluminum pipe that has excellent surface quality of each record in the preceding paragraph 1～17, with ultrasonic frequency f (kHz) in the ultrasonic oscillator and ultrasonic wave scavenging period T (minute) relation be set at f * T≤120 (kHz minute), come that the aluminum pipe that is obtained by above-mentioned drawing processing is carried out ultrasonic wave and clean.
(19) as the manufacture method of the aluminum pipe that has excellent surface quality of each record in the preceding paragraph 1～18, with the power output P (W) and the supersonic oscillations area S (cm of ultrasonic oscillator 2) relation be set at: 0.1≤P/S≤1.0 (W/cm 2) carry out ultrasonic wave and clean.
(20) as the manufacture method of each record in the preceding paragraph 1～19, wherein, above-mentioned aluminum pipe is the photosensitive drums aluminum pipe.
(21) aluminum pipe of making by the manufacture method of each record in the preceding paragraph 1～19.
(22) comprise the base of photoconductor drum of the aluminum pipe that the manufacture method by each record in the preceding paragraph 1～19 is made.
(23) a kind of manufacturing installation of aluminum pipe is characterized in that: comprising: extruder; Be arranged on this extruder extrude the direction anterior position, the cutting machine that synchronously moves and cut off with the translational speed of the aluminium extruded ejection pipe of from extruder, extruding; Wherein, in 10 meters of the positions or of spuing, carry out cut-out to aluminium extruded ejection pipe by cutting machine with interior position apart from the extrusion die of above-mentioned extruder.
(24) as the manufacturing installation of the aluminum pipe of preceding paragraph 23 record, wherein, be provided with backing roll between above-mentioned extruder and above-mentioned cutting machine, this backing roll constitutes around the felt pan that engages the synthetic fibers manufacturing on the outer peripheral face of roller core portion.
(25) as the manufacturing installation of the aluminum pipe of preceding paragraph 24 record, wherein, the main body that constitutes the fiber of above-mentioned felt pan is an aramid fibre.
(26), also comprise based on information the control device that the implementation of the rupturing operation of above-mentioned cutting machine is controlled from the translational speed of the aluminium extruded ejection pipe that velocity sensor obtained as the manufacturing installation of the aluminum pipe of each record in the preceding paragraph 23～25.
(27) as the manufacturing installation of the aluminum pipe of each record in the preceding paragraph 23～26, in 7 meters of the positions or by cutting machine aluminium extruded ejection pipe is cut off of spuing with interior position apart from the extrusion die of above-mentioned extruder.
(28) a kind of aluminium drawing pipe is characterized in that: do not have the small muscle shape blemish of roughly extending along the drawing direction from the teeth outwards in fact.
(29) a kind of base of photoconductor drum that constitutes by the aluminium drawing pipe that does not have roughly the small muscle shape blemish of extending along the drawing direction from the teeth outwards in fact.
(30) a kind of photosensitive drums is characterized in that: coating is formed with photosensitive layer on the outer peripheral face of preceding paragraph 22 or 29 described base of photoconductor drum.
(31) electrophotograph apparatus that uses preceding paragraph 30 described photosensitive drums to constitute.
In the invention of (1), because 10 meters of the positions or the aluminium extruded ejection pipe of extruding is cut off of spuing with interior position at the distance extrusion die, obtain length smaller or equal to 10 meters aluminium extruded ejection pipe, this is extruded the base pipe carry out drawing processing, can make the aluminum pipe that does not have blemish such as normal society, and then can production efficiency make the aluminum pipe that has excellent surface quality well.Can infer the generation that can prevent blemish such as normal society why like this, be because can shorten the time of contact of the felt mat of just having extruded of extruding base pipe and roll surface that is in the condition of high temperature, thereby the fiber that prevents felt mat effectively is hot sticky on the base tube-surface.
In the invention of (2), because 10 meters of the positions or the aluminium extruded ejection pipe of extruding is cut off of spuing with interior position at the distance extrusion die, after acquisition length is smaller or equal to 10 meters aluminium extruded ejection pipe, this is extruded the base pipe and carry out drawing processing, thereby can make the aluminum pipe that does not have blemish such as normal society, and then can production efficiency make the aluminum pipe that has excellent surface quality well.Can infer the generation that can prevent blemish such as normal society why like this, be because can shorten the time of contact of the felt mat of just having extruded of extruding base pipe and roll surface that is in the condition of high temperature, thereby the fiber that prevents felt mat effectively is hot sticky on the base tube-surface.
In the invention of (3), can fully prevent the generation of blemish such as normal society.
In the invention of (4), can prevent the generation of blemish such as normal society reliably.
In the invention of (5), owing to it is being transported towards extruding direction when the base pipe is extruded in the backing roll support that constitutes around engaging by felt pan by the synthetic fibers manufacturing, thereby, can do not damage extrude the base pipe keep the surface of good state outwardly in transport.
In the invention of (6), be aramid fibre owing to constitute the fibrous body of above-mentioned felt pan, can further prevent hot sticky the extruding on the base tube-surface (condition of high temperature) of fiber of felt mat fully.
In the invention of (7),, can make the aluminum pipe that is applicable to photosensitive drums well because the constituent of blank is defined in the above-mentioned particular range.
In the invention of (8), on the aluminium extruded ejection tube-surface of extruding, adhere to and shift owing to can prevent the aluminium slag, thereby can make the surface smoothing raising, can make the more excellent aluminum pipe of surface quality.
In the invention of (9), on the surface of the calibrating strap portion of extrusion die, be easy to generate the film of thin extruded material, thereby improved the compatibility of calibrating strap portion and extruded material, can relax hot sticky when extruding, can make the more excellent aluminum pipe of surface smoothing.
In the invention of (10), because the circumferential Ry that will extrude the base pipe is defined in the particular range, thereby, can prevent in the aluminum pipe that is obtained corrugation defective fully or the generation of the poroid defective that causes because of the oil hole.Thereby, when on aluminum tube surfaces, carrying out thin film cladding, can control coating and be detained, and then the even image of photosensitive drums becomes possibility.
In the invention of (11), adopt and the identical operation quantity of existing drawing processing, can contain to result from the generation of concavity defect in oil hole, and can repair and be present in the mould eyelet of extruding on the base tube-surface (ダ イ ス order), can make the high drawing pipe of surface smoothing.
In the invention of (12), because one or more cores that touch with the inner peripheral surface of extruding the base pipe are extruded the whole length of base pipe along this and are installed on the bar, can not cause deflection, can irrespectively begin to the axis and the consistent state of mold shaft line that keep the base pipe between drawing tailend with the base pipe range is short from drawing by the deadweight of extruding the base pipe.Thereby the position relation of can make mould (former), plug in the drawing all the time, extruding base pipe three is stable, reliably the aluminum pipe that manufacture deviation is few (drawing pipe).
In the invention of (13),,, can especially successfully carry out drawing so lubricating oil is rearward discharged easily when drawing owing on the outer peripheral face of core, be formed with the groove parallel with axis.
In the invention of (14), can make pulsation-free aluminum pipes (drawing pipe) such as surface smoothing excellence and circularity, wall thickness reliably.
In the invention of (15), can make the aluminum pipe that surface smoothing further improves.
In the invention of (16), owing to by roller straightener the warpage of aluminum pipe is aligned after excision becomes the oral area that foreign matter produces the source, foreign matter can not brought in the roller straightener, thereby can not can produce and result from the warpage that the scar ground of foreign matter carries out aluminum pipe and align.And owing to carry out the excision of oral area with the punching press process of chopping, when excision, do not produce and cut powder, thereby, can, powder mutually deeply concerned not carry out the warpage aligning of aluminum pipe because of causing scar ground
In the invention of (17), owing to cleaned more than or equal to 20 solvent by KB value with interior in 3 days after drawing, the oily lubricant that remains on the aluminum tube surfaces almost disappears totally, and the coating that has significantly reduced emulsion is caved in.Thereby because the uniform photosensitive layer coating that can be speckless can make image quality further improve.
In the invention of (18), can be contained on the aluminum tube surfaces convex defective and erect (generations), and then can prevent to result from the convex defective of standing shape effectively and the leakage of the photosensitive drums that produces and photosensitive layer generation of defects when applying.
In the invention of (19), can guarantee sufficient cleaning force, and prevent the generation of aluminum tube surfaces burr reliably.
In the invention of (20), can make the aluminum pipe of the photosensitive drums of electrophotograph apparatus such as being applicable to duplicator, printer, facsimile machine.
In the invention of (21), can provide a kind of aluminum pipe that has excellent surface quality.
In the invention of (22), can provide a kind of photosensitive drums of electrophotograph apparatus such as duplicator, printer, facsimile machine and base of photoconductor drum that has excellent surface quality of being applicable to.
According to the invention (manufacturing installation) of (23), can make the aluminum pipe that does not have blemish such as normal society, and then can production efficiency produce the aluminum pipe that has excellent surface quality well.
In the invention of (24), can when not damaging the surface of extruding the base pipe and keeping the surface of good state, transport.
In the invention of (25), be aramid fibre owing to constitute the fibrous body of felt pan, can further prevent hot sticky the extruding on the base tube-surface (condition of high temperature) of fiber of felt mat fully.
In the invention of (26), can make the aluminium extruded ejection pipe of the desired length of regulation correctly.
In the invention of (27), can prevent the generation of blemish such as normal society reliably.
In the invention of (28), can provide a kind of aluminum pipe that has excellent surface quality.
In the invention of (29), can provide a kind of photosensitive drums of electrophotograph apparatus such as duplicator, printer, facsimile machine and base of photoconductor drum that has excellent surface quality of being applicable to.
In the invention of (30), can provide a kind of photosensitive drums that is suitable for electrophotograph apparatus such as duplicator, printer, facsimile machine and can forms excellent image.
According to the invention of (31), can provide a kind of electrophotograph apparatus that can realize the excellent image quality.
Description of drawings
Figure 1A is the partial enlarged view of die bearing (the ダ イ ス ベ ア リ Application グ) portion of extrusion die, and Figure 1B is the section zoomed-in view of Ib-Ib line among Figure 1A, and Fig. 1 C is the section zoomed-in view of Ic-Ic line among Figure 1A;
Fig. 2 illustrates the sectional view that is used for an example extruding the porous shunting extrusion die (Port one ト ホ one Le ダ イ ス) that the base pipe extrudes;
Fig. 3 is the simple plan view of the manufacturing installation of this invention;
Fig. 4 is the sectional view of IV-IV line among Fig. 3;
Fig. 5 is the sectional view of backing roll;
Fig. 6 is the sectional view that an example of drawing processing unit (plant) is shown;
Fig. 7 A, 7B, 7C are respectively the perspective views of core;
Fig. 8 is the sectional view that other example of drawing processing unit (plant) is shown;
Fig. 9 is the key diagram that the definition to external diameter minification and basal area minification describes;
Figure 10 A is the amplification longitudinal section that the major part of drawing plug is shown, and Figure 10 B is the amplification longitudinal section that the major part of this drawing die is shown;
Figure 11 is the longitudinal section with the drawing processing mold after drawing plug shown in Figure 10 and the drawing die combination;
Figure 12 A is the side view that the local section of oral area (mouthful pair け portion) excision operation is shown, and Figure 12 B is the side view that the aligning operation is shown;
Figure 13 A is the sectional view that an example of sono-cleaner is shown, and Figure 13 B is the sectional view that other example is shown, and Figure 13 C is the perspective view that the partly cut-away of other example is shown;
Figure 14 is that Figure 14 A is the photo of 37.5 times of amplifications by the surface optical microphotograph of the aluminium drawing pipe of existing method manufacturing, and Figure 14 B is the photo of 100 times of amplifications.
The specific embodiment
Hereinafter the manufacture method according to the aluminum pipe that has excellent surface quality of the present invention is described according to operation (step) order.
At first the aluminum blank is extruded, obtained aluminium extruded ejection pipe 4 (extruding operation).
When extruding, preferably use extrusion die to extrude with following structure.The die bearing portion that just preferably use to form aluminium extruded ejection tube outside in the length of extruding direction smaller or equal to 5 millimeters and extrude at the extrusion die that the relation that makes progress center line average roughness Ra (Y) week of this calibrating strap portion and extrude the center line average roughness Ra (X) of direction is set at Ra (Y)＜Ra (X).
Do not have particular determination to extrusion way this moment, both can be to use the extrusion way of porous shunting extrusion die, can be the plug extrusion way yet, and Fig. 2 shows an example of the porous shunting extrusion die that uses in the porous divergent die is extruded.In Fig. 2,1 expression former, 2 expression pressing molds.Former 1 form to connect the extrusion cavities 11 of shape at central portion, and the side face of extrusion cavities entrance side constitutes circular calibrating strap portion 12.13 express oral area.On the other hand, pressing mold 2 has section at central portion and is circular shaping protuberance 21, is formed with circular calibrating strap portion 22 simultaneously on the front end side face of shaping protuberance 21.23 expressions make the hole of passing through that the aluminium base passes through.With above-mentioned former 1 and pressing mold 2 assemblings, shaping protuberance 21 front end faces of pressing mold 2 are to the extrusion cavities 11 of former 1, and the calibrating strap portion 12,22 of former, pressing mold is arranged to by ring-type shaping gap 3 relatively.
In this mould, the calibrating strap minister degree length that just former calibrating strap portion 12 is extruding direction (direction shown in the arrow X among Fig. 1) in mould shown in Figure 2 that forms aluminium extruded ejection tube outside is smaller or equal to 5 millimeters, and this calibrating strap portion circumferentially the center line average roughness Ra (Y) of (among Fig. 1 shown in the arrow Y) and the relation of extruding the center line average roughness Ra (X) of direction are set at Ra (Y)＜Ra (X).In case calibrating strap portion 12 is extruding length on the direction greater than 5 millimeters, then extrude the resistance that adds man-hour and become big, if do not increase the power of extruding, then can not be shaped.Calibrating strap portion 12 is smaller or equal to 3 millimeters in the length preferable range of extruding on the direction.On the other hand, if calibrating strap portion 12 is too short in the length of extruding on the direction, then because calibrating strap portion intensity reduces, damage easily, calibrating strap portion deflection and be easy to generate shortcoming such as shape instability is so the length of preferably guaranteeing calibrating strap portion is more than or equal to 1 millimeter.
Owing to be set at Ra (Y)＜Ra (X), the aluminium slag that adheres to, is deposited in the calibrating strap portion is easy to be captured in the groove on calibrating strap portion surface, thereby containment aluminium impurity is to extruding adhering to, shifting of base tube-surface.The method that is used to be set at Ra (Y)＜Ra (X) does not have particular determination, for example can be ground along circumferentially (Y direction) shown in Figure 1 by diamond file.
And, preferably use the extrusion die that satisfies following condition as extrusion die.Just the calibrating strap portion 12 of extrusion die is formed by superhard material, and the surface roughness Ry of this calibrating strap portion 12 (maximum height) preferably adjusts to 5～30 microns.By surface roughness being limited in the above-mentioned particular range, on the surface of calibrating strap portion 12, be easy to produce thin extruded material film, calibrating strap portion 12 is covered equably by the film with the extruded material same composition, so improved the compatibility of calibrating strap portion 12 and extruded material, hot sticky when extruding can be relaxed, the surface smoothing raising of extruding the base pipe can be made.If because Ry is less than 5 microns, the effect that then forms film is bad, so Ry had better not be less than 5 microns.In case Ry is greater than 30 microns, then surface smoothing decline, thereby Ry had better not be greater than 30 microns.And the surface roughness Ry (maximum height) of above-mentioned calibrating strap portion 12 preferably adjusts to 10～20 microns.For example by particle diameter, the injecting time of ball in the shot-peening processing method are controlled, can obtain the regulation surface roughness of this calibrating strap portion easily.And, can use various superhard alloys, pottery etc. to can be used as common mold materials and the material that uses as the superhard material that forms above-mentioned calibrating strap portion 12, this is not had particular determination.And above-mentioned Ry (maximum height) is stipulated by JIS B0601.
Then, in 10 meters of the positions or the above-mentioned aluminium extruded ejection pipe of extruding is cut off of spuing of distance extrusion die, obtain length smaller or equal to 10 meters aluminium extruded ejection pipe 4 (cut-out operation) with interior position.Just will from the extrusion die of extruder 24 spue position M to the off-position N of cutting machine 25 apart from Q be set in 10 meters or in, and so that the length R of the aluminium extruded ejection pipe 4 that is obtained by the cut-out of cutting machine 25 cuts off (with reference to figure 3) smaller or equal to 10 meters mode.
Fig. 3 shows and the above-mentioned simple plane of extruding operation and cutting off the relevant device of operation.In Fig. 3,24 expression extruders, 25 expression cutting machines, 26 expression backing rolls, 27 expression control device, 28 expression velocity sensors.
Above-mentioned extruder 24 is extruded aluminium extruded ejection pipe 4 from the extrusion die outlet of right-hand member after from left end the aluminum blank being imported.Above-mentioned cutting machine 25 is arranged on the anterior position of extruding direction of above-mentioned extruder 24, while simultaneously synchronously move the cut-out of carrying out base pipe 4 with the translational speed of the aluminium extruded ejection pipe of extruding from above-mentioned extruder 24 4.At this moment, the position M that spues apart from the extrusion die of above-mentioned extruder 24 be 10 meters with interior position, cut off by 25 pairs of aluminium extruded ejection of above-mentioned cutting machine pipe 4.Between above-mentioned extruder 24 and cutting machine 25, be provided with several to backing roll 26,26.A pair of backing roll 26,26 pictures are as shown in Figure 4 with the orthogonal state setting of axis, and are the setting of V word shape opening-wide state with the top.The aluminium extruded ejection pipe of extruding 4 is supported on the bottom position of this v-shaped openings, with this support form towards extruding direction the place ahead transportation aluminium extruded ejection pipe 4.Shown in the sectional view of Fig. 5, around attached on the tube roll core 26a outer peripheral face and constitute above-mentioned backing roll 26, the felt pan 26b of this outer surface contacts with the above-mentioned base pipe 4 of extruding, and supports with the felt pan 26b of synthetic fibers manufacturing.In the present embodiment, as the main fibre of the fiber that constitutes above-mentioned felt pan 26b, use aramid fibre.
Velocity sensor 28,28 is arranged on the sidepiece of the aluminium extruded ejection pipe of extruding from above-mentioned extruder 24 4, according to the translational speed information of the aluminium extruded ejection pipe 4 that is obtained by described velocity sensor 28,28, the enforcement of the rupturing operation of 27 pairs of above-mentioned cutting machines 25 of above-mentioned control device is controlled.Just smaller or equal to 10 meters mode aluminium extruded ejection pipe 4 is cut off with length R by the aluminium extruded ejection pipe 4 that cut-out was obtained of cutting machine 25.
Thereby, be 10 meters or the above-mentioned aluminium extruded ejection pipe of extruding 4 cut off by the position M that spues at the distance extrusion die with interior position, obtain length R smaller or equal to 10 meters aluminium extruded ejection pipe 4, and it is fed to follow-up drawing procedure, can make does not have the aluminium of blemish such as normal society drawing pipe 5, and then can production efficiency make the aluminum pipe 5 that has excellent surface quality excellently.The generation that can prevent blemish such as this normal society is to be inferred by following effect to obtain, the surperficial felt mat 26b of the aluminium extruded ejection pipe 4 of the condition of high temperature that promptly just has been extruded and backing roll 26 shortens time of contact, can prevent effectively that the fiber of felt mat 26b is hot sticky on the surface of base pipe 4.Wherein, preferably being 10 meters and with interior position the above-mentioned aluminium extruded ejection pipe of extruding 4 being cut off at the distance extrusion die position M that spues, is 1～6 meter aluminium extruded ejection pipe 4 to obtain length.And be preferably in apart from the extrusion die position M that spues and be 7 meters and with interior position the above-mentioned aluminium extruded ejection pipe of extruding 4 cut off, be 2～5 meters aluminium extruded ejection pipe 4 to obtain length.
And as the aluminum blank that will be imported in the above-mentioned extruder 24, though there is not particular determination, but preferably use the blank that constitutes by following constituent, promptly comprise Mn:1.1～1.6% quality, Si: smaller or equal to 0.7% quality, Fe: smaller or equal to 0.8% quality, Cu:0.04～0.21% quality, Zn: smaller or equal to 0.11 quality %, other composition is aluminium and unavoidable impurities.At this moment, have and to make the advantage that is particularly suitable for the aluminum pipe used as photosensitive drums.
Circumferential upper surface roughness Ry (maximum height) by the aluminium extruded ejection pipe 4 that above-mentioned cut-out obtained preferably is in 0.5～10 micron scope.As surface roughness Ry (maximum height) during greater than 10 microns, then on the aluminum tube surfaces that drawing processing is obtained, there is scabriculous shape defective easily, when carrying out the thin film cladding of photosensitive layer, become the reason of coating retention thus easily as photosensitive drums.On the other hand, as surface roughness Ry during less than 0.5 micron, it is too level and smooth then to extrude the base pipe, add man-hour in drawing, lubricating oil is pressed between drawing die and the base pipe, on the aluminum tube surfaces that is obtained, form easily the poroid defective that causes by oil hole (オ イ Le ピ Star ト), because of rather than institute preferably.The lower limit Ry that extrudes base pipe 4 circumferential upper surface roughness is preferably 1 micron, and higher limit Ry is preferably 7 microns.
And, the method that is used for the surface roughness that 4 weeks of aluminium extruded ejection pipe make progress is limited to the scope of Ry0.5～10 micron does not have particular determination, for example can adopt the die bearing portion of extrusion die is limited extruding direction length, or control extruded velocity smaller or equal to methods such as certain values.
To carry out drawing processing by the aluminium extruded ejection pipe 4 that above-mentioned cut-out obtained, obtain aluminum pipe (aluminium drawing pipe) 5 (drawing procedure) then.
In this drawing procedure, make aluminium extruded ejection pipe 4 after the above-mentioned cut-out by between drawing die 31 and the drawing plug 33, on one side between above-mentioned drawing die 31 and above-mentioned aluminium extruded ejection pipe 4 supplied viscosity smaller or equal to the lubricating oil of 200cst, on one side above-mentioned aluminium extruded ejection pipe 4 is carried out drawing, preferably with the reduced diameter rate from above-mentioned aluminium extruded ejection pipe 4 to aluminum pipe 5 smaller or equal to 30%, the basal area minification carries out drawing processing more than or equal to 5% mode.
As lubricating oil, if use full-bodied lubricating oil, in case lubricating oil is pressed between drawing die 31 and the aluminium extruded ejection pipe 4, then form the oil hole easily, form concavity defect easily, if but use the lubricating oil of viscosity smaller or equal to 200cst, then can contain the formation in oil hole, fully suppress the generation of concavity defect on aluminum pipe (the aluminium drawing pipe) 5.Particularly preferably, lubricating oil viscosity is smaller or equal to 100cst.As the lubricating oil of viscosity, for example can use the lubricating oil of mineral oils and grease class smaller or equal to 200cst.
Above-mentioned reduced diameter rate and above-mentioned basal area minification are respectively by following various definition (with reference to figure 9).
Reduced diameter rate (%)=(D 0-D)/D 0* 100
Basal area minification (%)=(S 0-S)/S 0* 100
If the reduced diameter rate surpasses 30%, mould eyelet (the ダ イ ス order) fragmentation of then extruding base pipe 4, expose in the bight, produces overlap shape and eaves shape defective easily on the surface of drawing pipe 5, because of rather than institute preferably.If the basal area minification is less than 5%, though since the mould eyelet can fully not stop up by drawing yet, thereby remaining have a concavity defect, because of rather than institute preferably.Particularly preferred reduced diameter rate is smaller or equal to 10%, and particularly preferred basal area minification is more than or equal to 20%.
And in above-mentioned drawing procedure, just make aluminium extruded ejection pipe 4 after the above-mentioned cut-out by carrying out drawing between drawing die 31 and the drawing plug 33, the above-mentioned base pipe 4 of extruding being carried out drawing and adds man-hour, as the bar 32 that above-mentioned drawing plug 33 is supported, preferably use along this whole length of extruding base pipe 4 and one or more cores 6 that touch with the above-mentioned inner peripheral surface of extruding base pipe 4 are installed and the bar 32 (with reference to figure 6～8) that constitutes.
Touch by the inner peripheral surface that is installed in core 6 and above-mentioned aluminium extruded ejection pipe 4 on the above-mentioned bar 32, can prevent to cause the deflection of base pipe 4 because of deadweight, by this core 6 is installed in the whole length range of this base pipe 4, until finishing drawing, can keep making the axis state consistent of base pipe 4 from the beginning drawing with the axis of above-mentioned mould 31.Owing to the position relationship change that can prevent mould 31, plug 33, base pipe 4 threes in drawing by the maintenance of this base pipe 4, can contain the deviation of aluminium drawing pipe 5 fully.
Above-mentioned core 6 so long as can prevent to extrude 4 deflections of base pipe and keep drawing die 31 and the shape of the axiality of base pipe 4 just.For example can be core 6a, 6b, the 6c of substantial cylindrical shown in Figure 7.Core 6a, the 6b of this shape, 6c install by making bar 32 run through central part ground, connect in the whole peripheral surface of 6a, 6b, 6c and base pipe 4, thereby can obtain stable confining force.And the core 6a that outer peripheral face is level and smooth shown in Fig. 7 A and the contact area of base pipe 4 are big, can obtain big confining force, but, because drawing lubrication oil is difficult to rearward discharge (spilling), therefore preferably shown in Fig. 7 B and Fig. 7 C, on outer peripheral face, form the groove 7 parallel with axis.Core 6b shown in Fig. 7 B is provided with groove 7 on the whole continuously at outer peripheral face, and the discharge efficient of lubricating oil is good, but the circumferential width of the contact-making surface 8 that contacts with the inner peripheral surface of base pipe 4 narrows down, and the confining force of base pipe 4 is little.On the other hand, core 6c shown in Fig. 7 C is provided with groove 7 with keeping being fit to spacing on outer peripheral face, and it is big that the circumferential width of the contact-making surface 8 that contacts with the inner peripheral surface of base pipe 4 becomes, and the confining force of base pipe 4 is also big, and the discharge of lubricating oil can successfully be carried out.Thereby, preferably adopt the shape of Fig. 7 C when on core 6, groove 7 being set.And, in Fig. 7 A, 7B and 7C,, on the long core 6e of size, can adopt identical section configuration though show size short core 6a, 6b, 6c.
The material of above-mentioned core 6 is not so long as not to extruding soft material that base pipe 4 causes damage just, have special restriction, preferably by resin manufacture such as nylon, polyvinyl chloride, polyethylene, polypropylene.
Because above-mentioned core 6 is guaranteed drawing die 31, the drawing plug 33 in the drawing, base pipe 4 threes' stable position relation, preferably the whole length along base pipe 4 is installed in above-mentioned core 6 on the bar 32.When whole length is installed, as shown in Figure 6, also can keep being fit to spacing ground the core 6d of a plurality of weak points is installed, and can use 1 long core 6e as shown in Figure 8.Under any situation, can both prevent to extrude the deflection of base pipe 4, can contain the deviation of aluminum pipe (drawing pipe) 5 fully.
In this external above-mentioned drawing procedure, just the aluminium extruded ejection pipe 4 after making above-mentioned cut-out is by carrying out drawing, the above-mentioned base pipe 4 of extruding being carried out drawing and adds man-hour between drawing die 31 and the drawing plug 33, as above-mentioned drawing die 31, preferably use the mould that is set in 10～40 ° of distortion cone angles (ア プ ロ one チ angle), 8～25 millimeters scopes of calibrating strap length, as above-mentioned drawing plug 33, preferably use the plug (with reference to Figure 10,11) that is set in 6～10 ° of cone angles of distortion, 1.5～3 millimeters scopes of calibrating strap length.
Figure 10 and 11 illustrates the drawing die 31 that steel pipe sizing drawing mode uses and the view of drawing plug 33.Above-mentioned drawing die 31 is entrenched in the die sleeve 41 by die sleeve 41, one and the mould body of being made up of materials such as mould steel, superhard alloy, potteries 42 constitutes, has drawing pass 43 in central authorities, around drawing pass 43, has drawing-die compression with 44 and coupled calibrating strap portion 45 and export department 46.And above-mentioned drawing-die is compressed the distortion taper angle theta with 44 1Preferably be set in 10～40 ° the scope.When distortion cone angle during less than 10 °, the drawing machining angle is little, and the shape particularly circularity of aluminum pipe 5 is difficult to occur, because of rather than institute preferably.On the other hand,, then be difficult to realize the surface smoothing of aluminum pipe 5 when distortion cone angle during greater than 40 °, because of rather than institute preferably.In addition, the length l of the calibrating strap portion 45 that the external diameter of aluminum pipe 5 is limited 1Preferably be set in 8～25 millimeters scopes.When the length of calibrating strap portion 45 during less than 8 millimeters, deviation appears in the circularity of aluminum pipe 5, wall thickness etc., and therefore the size instability is not that institute is preferred.On the other hand, if the length of calibrating strap portion 45, then produces hot sticky (sintering) greater than 25 millimeters, worrying to damage the surface smoothing of aluminum pipe 5, therefore is not that institute is preferred.
Above-mentioned drawing plug 33 also has drawing-die compression with 51 and coupled calibrating strap portion 52 and export department 53.The drawing-die of above-mentioned plug 33 is compressed the distortion taper angle theta with 51 2Preferably be set in 6～10 ° of scopes.If the distortion cone angle is less than 6 °, then the circularity of aluminum pipe 5 is difficult to occur, because of rather than institute preferably.On the other hand, when distortion cone angle during greater than 10 °, deviation appears in the circularity of aluminum pipe 5, wall thickness etc., the size instability, because of rather than institute preferably.In addition, the length l of the calibrating strap portion 52 of plug 33 2Preferably be set in 1.5～3 millimeters scopes.When the length of calibrating strap portion 52 during less than 1.5 millimeters, then the circularity of aluminum pipe 5 is difficult to occur, and therefore is not that institute is preferred.On the other hand, hot sticky if the length of calibrating strap portion 52 greater than 3 millimeters, then produces, worry to damage the surface smoothing of aluminum pipe 5, so be not that institute is preferred.And the internal diameter size of the outside dimension of the calibrating strap portion 52 of plug 33 and the calibrating strap portion 45 of mould 31 determines it is self-evident by the interior external diameter and the wall thickness relation of the aluminum pipe 5 that will make.
Above-mentioned drawing die 31 and drawing plug 33 add man-hour being used for drawing, as shown in figure 11, the mode that becomes the subtend shape with the substantial middle portion side face that is equivalent to the length direction of calibrating strap portion 45 in the space part of expectation wall thickness of aluminum pipe 5 and the mould 31 in sandwich by calibrating strap portion 52 side faces of drawing plug 33 makes up, and constitutes drawing die for processing 54 thus.After will extruding by extruder extrude base pipe 4 by in these mould 54 image patterns 11 shown in the chain-dotted line like that by drawing and necking down.Can only carry out a drawing and obtain aluminum pipe 5, also can back and forth carry out the several drawing, carry out necking down in order,, wherein preferably carry out 2 drawings and necking down and obtain aluminum pipe 5 to obtain aluminum pipe 5.
And in the above description,, be not confined to this especially though carry out drawing by steel pipe sizing drawing mode, also can adopt not stationary core rod but carry out drawing by floating core rod draw mode.
In above-mentioned drawing procedure, preferably implement drawing etc. in the mode that satisfies following condition.Just, preferably, by the crystal grain on the surface of the aluminium extruded ejection pipe 4 that above-mentioned cut-out obtained on the drawing direction average length more than or equal to 60 microns, by carrying out drawing processing so that this crystal grain average length on the drawing direction becomes more than or equal to 1.3 times mode, the crystal grain average length on the drawing direction that obtains the surface surpasses 300 microns aluminum pipe 5.The crystal grain that why uses the surface on the drawing direction average length more than or equal to 60 microns aluminium extruded ejection pipe 4, be because during less than 60 microns, in follow-up drawing processing, the crystal grain on surface average length on the drawing direction surpasses 300 microns and will be very difficult to realize.Crystal grain length is long more in the aluminium extruded ejection pipe 4, and in follow-up drawing processing, extension ratio is used to just realize that the degree of finish of the average length of crystal grain on the drawing direction above 300 microns just can be more little.But the extension ratio of the drawing processing preferably average length of surface microstructure on the drawing direction becomes more than or equal to 1.3 times.When extension ratio during less than 1.3 times, no matter crystal grain is much in the aluminium extruded ejection pipe 4, removes the small concavo-convex difficulties that will become such as vertical cut that produce by drawing processing on base pipe 4 surfaces, and worry can not obtain the tube-surface of mirror-like, because of rather than institute preferably.Extension ratio particularly preferably adopts 1.5～2.5 times.And, carry out on recrystallization temperature, annealing after the cold-drawn to extruding base pipe 4, by cold-drawn degree of finish and the annealing temperature of this moment are adjusted, can carry out the average length adjustment of the crystal grain on aluminium extruded ejection pipe 4 surfaces well.
Then, to carry out the warpage aligning through the aluminum pipe 5 that above-mentioned drawing procedure obtained.Align as following this warpage of carrying out.After just the oral area 57 of being processed institute's acquisition aluminum pipe by above-mentioned drawing being excised, use 61 pairs of these aluminum pipes of roller straightener to align by the punching press process of chopping.At first, make the oral area 57 of extruding base pipe 4 from the rear of drawing die 31 by drawing pass 43, by the chuck portion of load bearing component 58 oral area 57 is carried out the interlock clamping, make load bearing component 58 forwards carry out drawing (with reference to figure 6,8) movably.Dirt concentrates on the oral area 57 after the drawing, and, produce by the caused impression of the interlock of chuck portion.So, before carrying out the warpage aligning, oral area 57 is excised.Just shown in Figure 12 A, the end of oral area 57 sides of this aluminium drawing pipe 5 is inserted in the mould 59,59, cut off plug-in strip 60 and descend this oral area 57 is excised by making.So cut off not produce and cut powder by cutting off plug-in strip 60.In then this aluminium drawing pipe 5 being dropped into roller straightener 61 from the one end,, align so that its straight (with reference to figure 12B) by the effect of smoothing roll 62 grades of inside.Since do not produce cut powder ground with oral area 57 excision after, aluminium drawing pipe 5 is dropped in the roller straighteners 61, thereby dirt, aluminium are considered, are cut foreign matter such as powder to be worth doing and do not bring in the roller straightener 61.Thereby, in aligning, on aluminium drawing pipe 5, can not produce scar.
Then, the aluminum pipe 5 that has carried out above-mentioned warpage aligning is cleaned, remove above-mentioned lubricating oil by described cleaning.Described cleaning is preferably carried out as follows.Just be preferably in after the drawing in 3 days by KB (kauri gum butanols) value and aluminum pipe 5 cleaned more than or equal to 20 solvent.Why after drawing, clean by solvent in 3 days, in case be because drawing after through certain hour, then vapor away to cause solidifying and be difficult to remove owing to being included in the drawing processing volatile ingredient in the employed oily lubricant, in case above 3 days, even use the high solvent of degreasing power, also be difficult to remove.Scavenging period is preferably more early good more after drawing, and scavenging period more early even then use the low solvent of degreasing power, also can be removed lubricating oil fully.
The KB of above-mentioned solvent (kauri gum butanols) value is the solvability numerical value of degreasing power just that solvent is shown, by under 25 ℃, test solvent being splashed into by in the 20 gram solution that obtained behind 500 gram butanols dissolvings, the 100 gram natural seashell pine tree glue, being used in the mL numerical table that produces the test solvent that is applied before white opacity or the precipitation shows, the KB value is high more, and then solvability is big more.In this matting, preferably use the KB value to clean more than or equal to 20 solvent.This is because adopt the KB value less than the little solvent of 20 solvability, even oiliness lubricating oil can not be fully removed in cleaning in early days in 3 days after drawing., for example can adopt lam-oil (30), cyclohexane (60), toluene (100), aromatic series naphtha (volatile oil) (50～80), take off aromatic series mineral oil (20～30) etc. more than or equal to 20 solvent as the KB value.Wherein, preferably use the KB value to clean more than or equal to 25 solvent.Do not limit for the concrete grammar that cleans, for example can adopt infusion process, spray-on process etc.
Carry out more smart cleaning then.Wash as this seminal plasma, preferably adopt following ultrasonic wave to clean.Just preferably will be in ultrasonic oscillator ultrasonic frequency f (kHz) and ultrasonic wave scavenging period T (minute) relation be set at: f * T≤120 (kHz minute), by this ultrasonic wave to cleaning by above-mentioned aluminum pipe 5.By under this condition, cleaning, can prevent that the convex defective erects (generation) on the surface of aluminum pipe 5.Its reason is inferred as follows, that is, ultrasonic frequency f (kHz) and ultrasonic wave scavenging period T (minute) product with to clean energy relevant, when f * T＞120, energy is excessive, makes the convex defective occur erecting on the direction.Wherein, particularly preferably be and be set at f * T≤100 (kHz minute).On the other hand, if fT is too small, because cleaning performance is poor, thereby lower limit preferably is set at f * T 〉=2 (kHz minute).
And further wish, preferably with the power output P (W) of ultrasonic oscillator and the supersonic oscillations area area S (cm of vibrator just 2) relation be set at: 0.1≤P/S≤1.0 (W/cm 2), clean by this ultrasonic wave.As 0.1＞P/S (W/cm 2) time, worry what numerical value no matter fT adopt, and cleaning performance is all poor, from rather than institute preferred.On the other hand, as P/S＞1.0 (W/cm 2) time, the rough surface of aluminum pipe 5, thereby worry to leak increase, from rather than institute preferred.
Above-mentioned ultrasonic wave cleans by ultrasonic wave is transported in the cleaning fluid, to be cleaned thing just aluminum pipe clean, but hyperacoustic radiation modality does not have particular determination in rinse bath.For example also can use vibration shown in maqting type, Figure 13 C shown in immersion type cleaning machine shown in Figure 13 A, Figure 13 B to transmit type and other various cleaning machines.And in Figure 13,71 expression rinse baths, 72 expressions are cleaned the just a plurality of aluminum pipes of thing, 73 expression vibrators, 74 expression vibration converyers, 75 expression cleaning fluids.As above-mentioned cleaning fluid 75, though generally can use white lam-oil, light oil, alkali, interfacial agent or trichloro-ethylene etc., be not limited thereto, also can use water system, nytron system, chlorine-based organic solvent etc.
In addition, though there is no particular limitation for the distance of vibrator or vibration converyer and aluminum pipe, preferably be set to 2～50cm.
Through above-mentionedly extrude operation, cut off operation, drawing procedure, warpage aligning operation, matting, seminal plasma are washed operation and small muscle shape blemish (normal society) that the aluminum pipe 5 that obtains does not roughly extend along the drawing direction from the teeth outwards, are the aluminum pipes that has excellent surface quality.Thereby, be applicable to the base of photoconductor drum of electrophotograph apparatus such as duplicator, printer, facsimile machine.
Hereinafter specific embodiments of the invention are described.
Embodiment 1
Under following extrusion condition, to comprising Mn:1.12% quality, Si:0.11% quality, Fe:0.39% quality, Cu:0.16% quality, Zn:0.01 quality %, Mg:0.02 quality %, other composition is that the blank that aluminium and inevitable impurity are formed is extruded, obtain aluminium extruded ejection pipe (32 millimeters of external diameters, 1.5 millimeters of wall thickness).This aluminium extruded ejection pipe is 2.5 microns at circumferential upper surface roughness Ry.And the surface microstructure of this aluminium extruded ejection pipe average length on the drawing direction is 200 microns.
(extrusion condition)
Extrusion temperature: 520 ℃
Extruded velocity: 0.5 meter/minute
Extrusion die: use porous shunting extrusion die illustrated in figures 1 and 2.Die bearing portion is 3 millimeters in the length L of extruding direction.Center line average roughness Ra (Y) that calibrating strap portion is circumferential and the relation of extruding the center line average roughness Ra (X) of direction are set at Ra (Y)＜Ra (X).Calibrating strap portion is formed by superhard material, and the surface roughness Ry of calibrating strap portion is 5.5 microns.
Use device shown in Figure 3 then, cut off, obtain length and be 4 meters aluminium extruded ejection pipe 4 at the distance extrusion die aluminium extruded ejection pipe that the position of 7 meters of positions (M) extruded from extruder 24 by 25 pairs of cutting machines that spues.Just in Fig. 3, be set at Q=7 rice, R=4 rice.The fiber formation that constitutes the felt pan 26b on backing roll 26 surfaces is the fiber of anti-burning the 35 quality %, p-aromatic polyamides 65 quality %.
Be that 2.2 meters aluminium extruded ejection pipe 4 carries out drawing processing under following drawing condition to cutting off back length then, obtain external diameter and be 24 millimeters, wall thickness and be 0.8 millimeter aluminum pipe 5.
(drawing condition)
Draw-off gear: the draw-off gear of structure shown in Figure 6 (the core shape adopts shape shown in Figure 7)
Drawing mould: Figure 10 and structure shown in Figure 11
Drawing die: 15 ° of cone angles of distortion, 15 millimeters of calibrating strap length
Drawing plug: 7 ° of cone angles of distortion, 2 millimeters of calibrating strap length
Drawing speed: 15 meters/minute
Drawing number of times: 2 times
The reduced diameter rate of 1 drawing: 16%
The basal area minification of 1 drawing: 32%
Lubricating oil viscosity: 140cst
Other drawing condition: carry out drawing processing to make crystal grain become 1.8 times mode by drawing, obtain the average length of surface microstructure on the drawing direction and be 360 microns aluminum pipe in the average length of drawing direction.
After by the punching press process of chopping oral area 57 of processing the aluminum pipe 5 that is obtained by above-mentioned drawing being cut off then, use 61 pairs of these aluminum pipes 5 of roller straightener to carry out warpage aligning (with reference to Figure 12).
Then, by toluene (KB value: 100) aluminum pipe behind the aligning was cleaned with interior at 1 day, carry out ultrasonic wave with following condition afterwards and clean, obtain photosensitive drums aluminum pipe 5 thus.
(ultrasonic wave cleaning condition)
Ultrasonic frequency f:37kHz
Ultrasonic wave scavenging period T:1 minute
F * T=37kHz minute
The power output P:2400W of ultrasonic oscillator
Supersonic oscillations area S:4.760cm 2
P/S＝0.5W/cm 2
Embodiment 2～7
Except the position M that will spue from the extrusion die of extruder 24 to being set at shown in the table 1 numerical value of cutting machine 25 off-position N apart from Q and by cutting off the length R that extrudes base pipe 4 obtained, identical with embodiment 1, obtain the photosensitive drums aluminum pipe.
Comparative example 1
Obtain the photosensitive drums aluminum pipe by existing manufacture method.Just above-mentioned Q is set at 50 meters, R is set at 50 meters, obtains the photosensitive drums aluminum pipe.
Table 1
From extrusion die spue the position to off-position apart from Q (rice) The length of extruding the base pipe (rice) after the cut-out Estimate
Produce the disqualification rate (%) that causes by normal society The goods effective rate of utilization (%) of overall merit
Embodiment
1 7 4 8 87
Embodiment 2 6 5 6 90
Embodiment 3 5 3 4 92
Embodiment 4 4 2 3 93
Embodiment 5 3 1 2 94
Embodiment 6 9 9 8 87
Embodiment 7 8 5 7 89
Comparative example 1 50 50 30 60
In the foregoing description and comparative example, 1000 photosensitive drums aluminum pipes have been made respectively.By each embodiment 1000 aluminum tube surfaces have been carried out observation by light microscope, whether investigation has produced normal society (small muscle shape blemish) on the surface, calculates the quantity of the pipe of better quality, thus, asks for the disqualification rate (%) that is caused by normal society.And to these 1000 aluminum pipes, except whether producing the normal society, also estimate and whether have other blemish (whether having scar etc.), glacing flatness, thick partially, circularity, investigate them and whether satisfy desired specifications respectively, ask for the qualification rate in whole 5 evaluations, the effective rate of utilization (%) made with aluminum pipe of photosensitive drums just, the result is as shown in table 1.
As shown in table 1, normal society (small muscle shape blemish) occurrence frequency is very little in its surface by the aluminum pipe of the embodiment 1～7 of manufacture method manufacturing of the present invention, and the disqualification rate that is caused by this normal society significantly descends.This is external to comprise in the overall merit of the having or not of other blemish, glacing flatness, thick partially, circularity, and goods effective rate of utilization (yield rate) also significantly improves.Relative therewith, by the aluminum pipe of the comparative example 1 of existing manufacture method manufacturing normal society (small muscle shape blemish) occurrence frequency height in its surface, thereby the disqualification rate height that causes by normal society.And because this normal society occurrence frequency height, in above-mentioned overall merit, the goods effective rate of utilization is also low.
Employed term of the application and explanation are used for explanation according to embodiments of the invention, and the present invention is not limited thereto.In the scope of claims,, can carry out various design alterations to the present invention without departing from the spirit thereof.
Utilize possibility on the industry
According to aluminum pipe of the present invention and by the aluminum pipe of manufacture method manufacturing of the present invention owing to have excellent surface quality, can be applicable to the photosensitive drums of electrophotograph apparatus such as duplicator, printer, facsimile machine.

Claims (31)

1. the manufacture method of an aluminum pipe that has excellent surface quality, this method is after the aluminum blank being extruded acquisition aluminium extruded ejection pipe, carry out drawing processing and make aluminum pipe by this being extruded the base pipe, it is characterized in that:, this is extruded the base pipe for above-mentioned drawing processing in 10 meters of the positions or the above-mentioned aluminium extruded ejection pipe of extruding is cut off to obtain length smaller or equal to 10 meters aluminium extruded ejection pipe of spuing of distance extrusion die with interior position.
2. the manufacture method of an aluminum pipe that has excellent surface quality is characterized in that, comprising:
The aluminum blank is extruded to obtain the operation of extruding of aluminium extruded ejection pipe;
10 meters of the positions or the above-mentioned aluminium extruded ejection pipe of extruding is cut off with interior position of spuing at the distance extrusion die obtain the cut-out operation of length smaller or equal to 10 meters aluminium extruded ejection pipe; With
Aluminium extruded ejection pipe after the above-mentioned cut-out is carried out drawing processing to obtain the drawing procedure of aluminum pipe.
3. the manufacture method of the aluminum pipe that has excellent surface quality as claimed in claim 1 or 2 is characterized in that: 10 meters of the positions of spuing at the distance extrusion die cut off the above-mentioned aluminium extruded ejection pipe of extruding with interior position, obtain length and be 1～6 meter aluminium extruded ejection pipe.
4. the manufacture method of the aluminum pipe that has excellent surface quality as claimed in claim 1 or 2 is characterized in that: 7 meters of the positions of spuing at the distance extrusion die cut off the above-mentioned aluminium extruded ejection pipe of extruding with interior position, obtain length and be 2～5 meters aluminium extruded ejection pipe.
5. as the manufacture method of each described aluminum pipe that has excellent surface quality in the claim 1～4, it is characterized in that: when the backing roll that constitutes around the outer peripheral face that is bonded on roller core portion by the felt pan by the synthetic fibers manufacturing supports the above-mentioned aluminium extruded ejection pipe of extruding, it is transported towards extruding direction.
6. the manufacture method of the aluminum pipe that has excellent surface quality as claimed in claim 5 is characterized in that: the main body that constitutes the fiber of above-mentioned felt pan is an aramid fibre.
7. the manufacture method of the aluminum pipe that has excellent surface quality as claimed in claim 1 or 2, it is characterized in that: as above-mentioned aluminum blank, use comprises Mn:1.1～1.6% quality, Si: smaller or equal to 0.7% quality, Fe: smaller or equal to 0.8% quality, Cu:0.04～0.21% quality, Zn: smaller or equal to 0.11 quality %, other composition is the blank that aluminium and inevitable impurity are formed.
8. the manufacture method of the aluminum pipe that has excellent surface quality as claimed in claim 1 or 2, it is characterized in that: use following extrusion die to extrude, smaller or equal to 5 meters, and the circumferential center line average roughness Ra (Y) of this calibrating strap portion and the relation of extruding the center line average roughness Ra (X) of direction are set at Ra (Y)＜Ra (X) in the length L of extruding direction in the die bearing portion of the outside of the formation aluminium extruded ejection pipe in the described extrusion die.
9. the manufacture method of the aluminum pipe that has excellent surface quality as claimed in claim 1 or 2 is characterized in that: to adjust to Ry (maximum height) be that 5～30 microns extrusion die is extruded to the surface roughness of this calibrating strap portion when using calibrating strap portion to be formed by superhard material.
10. the manufacture method of the aluminum pipe that has excellent surface quality as claimed in claim 1 or 2 is characterized in that: the surface roughness Ry (maximum height) that is made progress by the aluminium extruded ejection Guan Zaizhou that above-mentioned cut-out obtained is 0.5～10 micron.
11. the manufacture method of the aluminum pipe that has excellent surface quality as claimed in claim 1 or 2, it is characterized in that: the aluminium extruded ejection pipe after making above-mentioned cut-out carries out drawing and adds man-hour the above-mentioned base pipe of extruding by carrying out drawing between drawing die and the drawing plug, to above-mentioned drawing die and the above-mentioned supplied viscosity of extruding between the base pipe smaller or equal to the lubricating oil of 200cst, and carry out drawing processing, make from above-mentioned extrude the base pipe to the reduced diameter rate of aluminum pipe smaller or equal to 30%, the basal area minification is more than or equal to 5%.
12. the manufacture method of the aluminum pipe that has excellent surface quality as claimed in claim 1 or 2, it is characterized in that: the aluminium extruded ejection pipe after making above-mentioned cut-out carries out drawing and adds man-hour the above-mentioned base pipe of extruding by carrying out drawing between drawing die and the drawing plug, as the bar that above-mentioned drawing plug is supported, use one or more cores that touch with the above-mentioned inner peripheral surface of extruding the base pipe to install and the bar of formation along this whole length of extruding the base pipe.
13. the manufacture method of the aluminum pipe that has excellent surface quality as claimed in claim 12 is characterized in that: on the outer peripheral face of above-mentioned core, form the groove parallel with axis.
14. the manufacture method of the aluminum pipe that has excellent surface quality as claimed in claim 1 or 2, it is characterized in that: the aluminium extruded ejection pipe after making above-mentioned cut-out carries out drawing and adds man-hour the above-mentioned base pipe of extruding by carrying out drawing between drawing die and the drawing plug, as above-mentioned drawing die, use the distortion cone angle to be set in 10～40 °, the length setting of calibrating strap portion mould 8～25 millimeters scopes, as above-mentioned drawing plug, use the distortion cone angle to be set in 6～10 °, the length setting of calibrating strap portion plug 1.5～3 millimeters scopes.
15. the manufacture method of the aluminum pipe that has excellent surface quality as claimed in claim 1 or 2, it is characterized in that: by the surface microstructure of the aluminium extruded ejection pipe that above-mentioned cut-out obtained the average length of drawing direction for more than or equal to 60 microns, by carrying out drawing processing so that this crystal grain becomes more than or equal to 1.3 times mode in the average length of drawing direction, obtain surface microstructure surpasses 300 microns in the average length of drawing direction aluminum pipe.
16. the manufacture method of the aluminum pipe that has excellent surface quality as claimed in claim 1 or 2 is characterized in that: after by the punching press process of chopping oral area by above-mentioned drawing processing institute acquisition aluminum pipe being excised, use roller straightener that this aluminum pipe is carried out the warpage aligning.
17. the manufacture method of the aluminum pipe that has excellent surface quality as claimed in claim 1 or 2 is characterized in that: after drawing, more than or equal to 20 solvent the aluminum pipe that is obtained by above-mentioned drawing processing was cleaned with KB (kauri gum butanols) value with interior in 3 days.
18. the manufacture method of the aluminum pipe that has excellent surface quality as claimed in claim 1 or 2, it is characterized in that: with ultrasonic frequency f (kHz) in the ultrasonic oscillator and ultrasonic wave scavenging period T (minute) relation be set at f * T≤120 (kHz minute), come that the aluminum pipe that is obtained by above-mentioned drawing processing is carried out ultrasonic wave and clean.
19. the manufacture method of the aluminum pipe that has excellent surface quality as claimed in claim 18 is characterized in that: with the power output P (W) and the supersonic oscillations area S (cm of ultrasonic oscillator 2) relation be set at 0.1≤P/S≤1.0 (W/cm 2) carry out ultrasonic wave and clean.
20. the manufacture method of the aluminum pipe that has excellent surface quality as claimed in claim 1 or 2 is characterized in that: above-mentioned aluminum pipe is the photosensitive drums aluminum pipe.
21. aluminum pipe by each described manufacture method manufacturing in the claim 1～19.
22. comprise the base of photoconductor drum of the aluminum pipe of making by each described manufacture method in the claim 1～19.
23. the manufacturing installation of an aluminum pipe is characterized in that:
Comprise: extruder; Be arranged on this extruder extrude the direction anterior position, the cutting machine that synchronously moves and cut off with the translational speed of the aluminium extruded ejection pipe of from extruder, extruding;
Wherein, in 10 meters of the positions or of spuing, carry out cut-out to aluminium extruded ejection pipe by cutting machine with interior position apart from the extrusion die of above-mentioned extruder.
24. the manufacturing installation of aluminum pipe as claimed in claim 23 is characterized in that: be provided with backing roll between above-mentioned extruder and above-mentioned cutting machine, this backing roll constitutes around the felt pan that engages the synthetic fibers manufacturing on the outer peripheral face of roller core portion.
25. the manufacturing installation of aluminum pipe as claimed in claim 24 is characterized in that: the main body that constitutes the fiber of above-mentioned felt pan is an aramid fibre.
26. manufacturing installation as each described aluminum pipe in the claim 23～25, it is characterized in that also comprising based on information the control device that the implementation of the rupturing operation of above-mentioned cutting machine is controlled from the translational speed of the aluminium extruded ejection pipe that velocity sensor obtained.
27. the manufacturing installation as each described aluminum pipe in the claim 23～25 is characterized in that: in 7 meters of the positions or by cutting machine aluminium extruded ejection pipe is cut off of spuing with interior position apart from the extrusion die of above-mentioned extruder.
28. an aluminium drawing pipe is characterized in that: do not have the small muscle shape blemish of roughly extending from the teeth outwards in fact along the drawing direction.
29. base of photoconductor drum that constitutes by the aluminium drawing pipe that does not have roughly the small muscle shape blemish of extending along the drawing direction from the teeth outwards in fact.
30. a photosensitive drums is characterized in that: coating is formed with photosensitive layer on the outer peripheral face of claim 22 or 29 described base of photoconductor drum.
31. the electrophotograph apparatus that uses the described photosensitive drums of claim 30 to constitute.
CNB038269813A 2003-08-27 2003-09-10 Aluminum pipe having excellent surface quality, method and apparatus for manufacturing the aluminum pipe, and photosenstive drum base body Expired - Fee Related CN100446882C (en)

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