CN1245529C - Open-and-close device made of aluminium alloy plate for recording medium shell - Google Patents
Open-and-close device made of aluminium alloy plate for recording medium shell Download PDFInfo
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- CN1245529C CN1245529C CN 02106723 CN02106723A CN1245529C CN 1245529 C CN1245529 C CN 1245529C CN 02106723 CN02106723 CN 02106723 CN 02106723 A CN02106723 A CN 02106723A CN 1245529 C CN1245529 C CN 1245529C
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Abstract
This invention provides an aluminum alloy sheet for a recording medium case shutter which satisfies all the characteristics.The shutter comprises following materials: aluminum alloy substrate, in which the aluminum alloy contains 2.2-2.8 mass % of Mg, 0.35-0.55 mass % of Mn and 0.1-0.4 mass % of Fe; on a surface which is the shutter outer surface side of an aluminum alloy substrate, a chromate film of 5 to 50 mg/m<2> in terms of chromium coating weight is formed as a first layer, and a acrylate modified polyester urethane based resin coating film is formed as a second layer on the surface of the shutter outer surface side; the synthetic resin coating film contains an acrylate modified polyester urethane based resin, inorganic particles with an average particle size of 10 mum or less, and of 5 to 20 parts by weight based on 100 parts by weight of the acrylate modified polyester urethane based resin, and a polyethylene oxide based lubricant of 0.5 to 3 parts by weight based on 100 parts by weight of the acrylate modified polyester urethane based resin. The synthetic resin coating film is formed with a film thickness of 0.5 to 3 mum.
Description
Technical field
The present invention relates to be arranged on the shutter on the housing that holds disks such as floppy disk and recording mediums such as CD such as MO disk and minidisk.Be particularly related to employing and satisfy the shutter of the aluminium alloy plate of light weight, rigidity, anti-defect, punching processing, bendability, anti-solvent solubility and ultraviolet curable ink printing characteristic fully.
Background technology
In CDs such as floppy disk disks such as (floppy disks), MO disk and minidisk etc., the example of floppy disk as shown in fig. 1 holds the disk or the CD recording mediums 3 such as (record disks) of the information that write down in plastic housing 2.In addition, when writing or read information, make magnetic head or shaven head, above-mentioned disk or disk medium 3 are read and write near the recording medium 3 in this housing 2.Therefore, on this housing 2, peristome (window portion) is set,, also is provided with shutter 1 in order to open and close this peristome as being used for configuration magnetic head or bare headed window near recording medium 3.
Shown in the drawing in side sectional elevation of the oblique drawing of Fig. 2 and Fig. 3, this shutter 1 is that cross-sectional shape is the sheet material of コ font, under state with this opposite clamping housing 2, by by the guide path guided slidable that is arranged on the housing 2, thereby open window in the window portion of housing 2 and the window portion 4 involutory positions of shutter 1, close the window portion of housing 2 usually.
And the desired function of this shutter is to open and close protection magnetic face where necessary.In addition, slide mobilely for guiding on housing, shutter must light weight and the rigidity height.Therefore, in recent years,, use light weight and have the inflexible aluminium alloy plate as the shutter material.
When using aluminium alloy plate in shutter, if expose aluminium alloy plate on the shutter surface, then Biao Mian oilness is low, and surface hardness is low, therefore, and the galling deficiency.For this reason, during manufacturing or when using product, be easy to generate flaw on the surface.And the printshop on the aluminium alloy plate surface that metal covering exposes is low with the adaptation of printing ink.
In order to address the above problem, the various shutters that various surface cure coatings are set have been proposed on the aluminium alloy plate surface.The applicant is in order to prevent to produce flaw, also proposed on the aluminium alloy plate surface to be provided with the shutter (the open communique 11-144425 of Japan's special permission) of the thermosetting resin overlay film of the inorganic particles that contains specific median size and lubricant, in order to improve the adaptation of ultraviolet curable ink, proposed on the aluminium alloy plate surface to be provided with the shutter (the open communique 2000-30400 of Japan's special permission) that to have acrylate-based polyester as functional group be the urethane resin overlay film.
But, even these prior arts of the applicant, certainly have as characteristics such as desired light weight of aluminium alloy plate that is used for shutter and rigidity, but the not talkative all characteristics that has fully satisfied processibility, anti-solvent solubility and ultraviolet curable ink printings such as anti-defect, punching processing and bendability wishes that each characteristic further improves.
Summary of the invention
The present invention proposes in view of the above problems, its purpose be to provide a kind of realize with high level satisfy simultaneously light weight, rigidity, anti-defect, punching processing, bendability, anti-solvent solubility and ultraviolet curable ink printing all characteristics aluminium alloy plate and adopt its shutter.
The present invention who solves above-mentioned problem opens and closes the open-and-close device made of aluminium alloy plate that the record-header that is arranged on the housing that holds recording medium is used window portion, form by following material: aluminium alloy base plate, above-mentioned aluminium alloy contains Mg:2.2 to 2.8 quality %, Mn:0.35 to 0.55 quality % and Fe:0.1 to 0.4 quality %; As the chromic salt overlay film of the 1st layer of setting, it is 5 to 50mg/m that above-mentioned chromic salt overlay film is arranged to be scaled the chromium adhesion amount on the surface of the shutter exterior side that forms above-mentioned recording medium shell at least of above-mentioned aluminium alloy base plate
2Is the overlay film that urethane resin constitutes as the 2nd layer of setting on above-mentioned shutter exterior side by acrylate modified polyester, above-mentioned is that the overlay film thickness that urethane resin constitutes is 0.5 to 3 μ m by acrylate modified polyester, with with respect to aforesaid propylene acid esters modified poly ester be urethane resin 100 weight parts be the ratio of 5 to 20 weight parts to contain median size be inorganic particles below the 10 μ m, being that urethane resin 100 weight parts are that the ratio of 0.5 to 3 weight part contains the oxidic polyethylene base lubricant with respect to aforesaid propylene acid esters modified poly ester.
As above-mentioned inorganic particles, can adopt to be selected from least a in colloidal silica, talcum and the mica.
In addition, the tensile strength of preferred above-mentioned aluminium alloy plate is 300 to 350MPa.
Embodiment
Describe the present invention below in detail.The aluminium alloy plate that is used for the shutter of recording medium shell of the present invention forms the chromic salt overlay film from the teeth outwards as the 1st layer, on this chromic salt overlay film, form the synthetic resins overlay film as the 2nd layer, wherein, described surface is made of the shutter exterior side of the recording medium shell at least of aluminium alloy base plate and this aluminium alloy base plate.
At first, being converted into the chromium adhesion amount as the 1st layer of setting on the surface of aluminium alloy base plate is 5 to 50mg/m
2The chromic salt overlay film, as the 2nd layer of synthetic resins overlay film that following composition is set.It is urethane resin that this synthetic resins overlay film has acrylate modified polyester, is that median size that urethane resin 100 weight parts contain 5 to 20 weight parts is the inorganic particles below the 10 μ m and the oxidic polyethylene base lubricant of 0.5 to 3 weight part with respect to this acrylate modified polyester.In addition, this synthetic resins overlay film is set, can obtains punching processing, bendability, anti-defect, printing and anti-solvent solubility excellent characteristic by thickness with 0.5 to 3 μ m.
By be converted into the chromium adhesion amount as the 1st layer of setting on the aluminium alloy plate surface is 5 to 50mg/m
2The chromic salt overlay film, have and improve aluminium alloy plate and effect as the interlayer adaptation of the synthetic resins overlay film of the 2nd layer of setting, being difficult for bending adds peeling off that overlay film broke and caused man-hour, and is difficult for producing flaw simultaneously on material surface.
Below, each composition as the synthetic resins overlay film of the 2nd layer of setting is described.
Acrylate modified polyester is a urethane resin
Polyester be urethane resin since in the polyester portion molecule ratio of aliphatics composition many, and ester bond be two dimension, thereby forms the wire high molecular weight resin, so has high stretch characteristics.The overlay film of the bending machining part when suppressing bending machining by this effect breaks and peels off.And, because that urethane bond is compared with other resin key is more intense, and the molecular interaction between the urethane bond, thereby have high strength.By this effect overlay film hardness is improved, be difficult on material surface, producing flaw, in the solvent wash operation, be difficult for the synthetic resins overlay film that stripping applies simultaneously.
In addition, acrylate modified by to the polyester that has high stretch characteristics and intensity like this being that urethane resin carries out, improve the adaptation between material surface and the UV curable ink, improve printing.The mechanism that printing is improved describes below.
Be used on the shutter surface UV curable ink that the printing of the manufacturer name of expression recording medium and kind etc. is used, constitute by acrylate-based oligopolymer, Photoepolymerizationinitiater initiater and pigment such as having urethane acrylate system and epoxy acrylate system.The luminous energy (h ν) that is produced by irradiation ultraviolet radiation (UV) in the printing ink sclerosis is necessary, as follows, if the UV curable ink is applied luminous energy (h ν), the catalyst action by Photoepolymerizationinitiater initiater then, acrylate-based generation radical with acrylate-based oligopolymer is bonded to each other between these radicals and solidifies.
Adopting acrylate modified polyester among the present invention is the synthetic resins overlay film of urethane resin, even apply luminous energy such as ultraviolet ray, also debond each other between the acrylate in overlay film.On overlay film when lamination UV curable ink and irradiation ultraviolet radiation (UV), catalyst action by the Photoepolymerizationinitiater initiater in the UV curable ink, the acrylate-based radical that becomes together in the acrylate-based and overlay film in the UV curable ink, the firm combination of acrylate-based generation in the acrylate-based and overlay film in the UV curable ink of formation radical.Therefore, the adaptation of UV curable ink is good, and printing improves.
Inorganic particles
Can use more than one materials that are selected from colloidal silica, talcum and the mica etc. as inorganic particles, these material relative hardness height, by contain these materials in the synthetic resins overlay film, the surface hardness of material further improves, and is difficult for producing flaw.
The oxidic polyethylene base lubricant
By in the synthetic resins overlay film, adding lubricant, improve the oilness of material surface.The raising of material surface oilness has the effect that is difficult for producing flaw on material surface, when having reduced punching processing simultaneously to the load of parting tool point of a knife, therefore, have the wearing and tearing that suppress the parting tool point of a knife, suppress on the shutter end face of punching processing, to produce the effect of burr owing to the angle of collapsing of point of a knife end after the continuous molding.
As lubricant, be synthetic compound lubricants such as oxidic polyethylene system, crystallite system, tetrafluoroethylene system and fluorine system, and grease base lubricants such as lanolin and carnauba wax etc., be difficult for to produce the viewpoint of flaw from material surface, use since molecular structure to become linear chain structure thereby oilness good and have a high-intensity oxidic polyethylene base lubricant.
Below to describing as the chromic salt overlay film of the 1st layer of setting with as the numerical definiteness reason of the synthetic resins overlay film of the 2nd layer of setting.
The chromium adhesion amount of chromic salt overlay film: 5 to 50mg/m
2
By on the aluminium alloy base plate surface, the chromic salt overlay film being set as the 1st layer, improve aluminium alloy plate and interlayer adaptation as the synthetic resins overlay film of the 2nd layer of setting, what overlay film broke and causes when being difficult for producing by bending machining peels off, have the effect that is difficult on material surface, producing flaw simultaneously, but at the not enough 5mg/m of chromium adhesion amount
2The time, almost can't see this effect.On the other hand, at the chromium adhesion amount greater than 50mg/m
2The time, have following problems: chromic salt overlay film itself produces and to break during bending machining, be that starting point also produces on the synthetic resins overlay film and breaks with it, and then peels off at generation disruptive position.Therefore, making the chromium adhesion amount of chromic salt overlay film is 5 to 50mg/m
2Scope.
The median size of inorganic particles: below the 1O μ m
In the synthetic resins overlay film, add inorganic particles and have the effect that improves the difficult generation of material surface hardness flaw, but its median size is during greater than 10 μ m, inorganic particles fixing insufficient in the synthetic resins overlay film, bending machining part when bending machining, inorganic particles comes off easily.When inorganic particles came off, accumulation caused to add and produce flaw man-hour on material surface in mould.In addition, produce inorganic particles attached on the magnetic face readwrite performance being caused problem such as obstacle.Therefore, making the median size of inorganic particles is below the 10 μ m.
Inorganic particles with respect to the content of acrylate modified polyester based resin 100 weight parts is: 5 to 20
Weight part
In the synthetic resins overlay film, add inorganic particles, have and improve the effect that material surface hardness is difficult for producing flaw, but, inorganic particles with respect to acrylate modified polyester be urethane resin 100 weight parts contain quantity not sufficient 5 weight parts the time, its effect can not be given full play to.On the other hand, more than 20 weight parts the time, superfluous inorganic particles fixing insufficient in the synthetic resins overlay film, the problem that the bending machining part inorganic particles when being created in bending machining comes off.Therefore, making inorganic particles is that the content of urethane resin 100 weight parts is the scope of 5 to 20 weight parts with respect to acrylate modified polyester.
The oxidic polyethylene base lubricant is with respect to the content of acrylate modified polyester based resin 100 weight parts
For: 0.5 to 3 weight part
In the synthetic resins overlay film, add the oxidic polyethylene base lubricant, have the oilness that improves material surface, be difficult for producing flaw at material surface, the shutter end face that suppresses punching processing produces the effect of burr, when it contained quantity not sufficient 0.5 weight part, this effect can not be given full play to.On the other hand, the content of oxidic polyethylene base lubricant is during greater than 3 weight parts, superfluous oxidic polyethylene base lubricant is at synthetic resins overlay film surface segregation, hindered that acrylate-based and acrylate modified polyester is combination acrylate-based in the urethane resin in the UV curable ink, therefore, produce the problem of the adaptation that reduces the UV curable ink.Therefore, making the oxidic polyethylene base lubricant is the scope of the content of urethane resin 100 weight parts at 0.5 to 3 weight part with respect to acrylate sex change polyester.
The thickness of synthetic resins overlay film: 0.5 to 3 μ m
By above-mentioned synthetic resins overlay film is set on aluminium alloy plate, can obtain on material surface, to be difficult for producing the effect of flaw, still, during the thickness less than 0.5 μ m of synthetic resins overlay film, this effect is difficult to performance.On the other hand, the thickness of synthetic resins overlay film is during greater than 3 μ m, and the internal stress of the overlay film of formation is too high, and the adaptation of overlay film reduces.In addition, if the adaptation of this overlay film reduces, be created in the problem that bending machining part overlay film is peeled off easily.Therefore, make the scope of the thickness of synthetic resins overlay film at 0.5 to 3 μ m.
Become the pencil hardness on surface of the shutter exterior side of recording medium shell: more than the 5H
In addition, become the pencil hardness on surface of shutter exterior side of recording medium shell of the aluminium alloy plate of such formation, from being difficult for producing the viewpoint of flaw, more than 5H.
The tensile strength of aluminium alloy plate: 300 to 350MPa
And the tensile strength of the aluminium alloy plate integral body of Xing Chenging preferably arrives in the scope of 350MPa 300 like this.If tensile strength is less than 300MPa, the rigidity of shutter becomes insufficient, and shutter is shaped and adds man-hour, may be created in the recording medium shell assembling procedure and shutter is out of shape when using as recording medium shell problem.On the other hand, tensile strength is during greater than 350MPa, because intensity is too high, and when the punching processing when shutter is shaped is arranged, the tendency that the point of a knife end of aggravation machining tool (cutting knife) weares and teares.Therefore, the scope of the tensile strength of aluminium alloy plate preferred 300 to 350MPa.
In addition, aluminium alloy base plate itself can use various substrates, but by using the aluminium alloy base plate of following composition, effect of the present invention is better.The composition that the following describes this aluminium alloy base plate adds reason and forms the qualification reason.
Aluminium alloy base plateMg
Content: 2.2 to 2.8 quality %
Mg promotes work hardening when cold rolling aluminium alloy base plate, have the effect that improves the strength of materials, therefore, is necessary composition in the present invention.But, Mg contain quantity not sufficient 2.2 quality % the time, can't obtain full intensity and improve effect, the rigidity of shutter becomes insufficient, for example, when recording medium shell falls, produces the rough sledding that shutter deforms and comes off easily.On the other hand, if add Mg too much, intensity is too high, thereby during the punching processing when the shaping shutter, aggravated the point of a knife end wearing and tearing of machining tool (cutting knife), after continuous molding, the wearing and tearing of point of a knife end cause and produce the angle (R increase) of collapsing, therefore, there is the problem that is easy to generate burr on the shutter end face of punching processing.Therefore, the add-on of Mg is preferably in the scope of 2.2 to 2.8 quality %.
Aluminium alloy base plateMn
Content: 0.35 to 0.55 quality %
Mn be added on generation can improve punching processing the time Al-Fe-Mn of cuttability be that crystallisate and the strength of materials aspect that improves aluminium alloy base plate have effect, therefore, in the present invention, Mn contains as necessary composition.By generating Al-Fe-Mn is crystallisate, the cuttability of aluminium alloy plate improves, to the burden of parting tool point of a knife, thereby suppressed the wearing and tearing of parting tool point of a knife when reducing punching processing, suppressed because the angle of collapsing of the point of a knife end after the continuous molding produces burr on the shutter end face of punching processing.In order to show the effect that this cuttability improves, must add at least more than the Mn0.35 quality %.But, if the Mn that adds more than 0.55 quality %, the quantity that the generation of huge crystallisate and crystallisate generate increases, plasticity reduces, and when the shutter bending machining is become the コ font, appears at bending machining sometimes and partly produces the disruptive problem.Therefore, the addition of Mn is preferably in the scope of 0.35 to 0.55 quality %.
Aluminium alloy base plateFe
Content: 0.1 to 0.4 quality %
Add Fe and aspect generating the crystal grain miniaturization that the Al-Fe-Mn of cuttability can improve punching processing the time is crystallisate and the plasticity that makes aluminium alloy base plate raising, have very big effect.The addition of Fe is many more, and crystal grain is got over miniaturization.But the addition of Fe can not be seen this effect during less than 0.1 quality %, in addition, surpasses 0.4 quality % if add, and the generation quantity of the generation of huge crystallisate and crystallisate increases, and causes plasticity to reduce sometimes.Therefore, the addition of Fe is preferably in the scope of 0.1 to 0.4 quality %.
Below the manufacture method of aluminium alloy plate is as constituted above described.At first, for example, will have above-mentioned composition (contain Mg:2.2 to 2.8 quality %, Mn:0.35 to 0.55 quality %, Fe:0.1 is to 0.4 quality %, remainder is made up of aluminium and unavoidable impurities) the aluminium alloy dissolving, ingot bar is made in continuous casting.Then, for example carrying out 4 hours the processing that homogenizes under 500 ℃ the temperature.Then, the ingot bar of handling that carried out homogenizing is implemented hot rolling or hot rolling and cold rolling, be rolled into given thickness of slab.Then, process annealing is carried out in this milled sheet under the temperature more than 350 ℃, carried out cold rollingly, making final rolling rate is 20 to 90%.
Then, in case of necessity, carry out stabilization treatment and straightening etc.Then, as applying pre-treatment,, remove the oil content and the oxidation overlay film on aluminium alloy plate surface by alkali degreasing and acid treatment etc.
As aluminium alloy base plate of the present invention, on the surface of this aluminium alloy base plate, is 5 to 50mg/m to be converted into the chromium adhesion amount with the aluminium alloy plate that obtains
2Amount the chromic salt overlay film is set as the 1st layer.Then, as the 2nd layer, apply on the aluminium alloy plate surface by for example cylinder cladding process that to contain acrylate modified polyester be urethane resin, median size is the following inorganic particles (is that urethane resin 100 weight parts are 5 to 20 weight parts with respect to acrylate modified polyester) of 10 μ m and the coating of oxidic polyethylene base lubricant (is that urethane resin 100 weight parts are 0.5 to 3 weight part with respect to acrylate modified polyester), making dried thickness is 0.5 to 3 μ m, by heat drying below 250 ℃ for example 5 to 30 seconds, on the chromic salt overlay film, form the synthetic resins overlay film.
Description of drawings
Fig. 1 is the front view of expression as the floppy disk of recording medium.
Fig. 2 is the skeleton view that expression is used for the shutter on this floppy disk housing.
Fig. 3 is the sectional view of this shutter.
Fig. 4 is the figure of the test conditions of the explanation embodiment of the invention.
Embodiment 1
Below compare with comparative example outside the scope of the invention, the characteristic of the embodiment of the invention 1 is described.
Adopt aluminium alloy (alloy 1) that ordinary method will be made of Mg:2.75 quality %, Mn:0.4 quality %, Fe:0.19 quality %, Si:0.11 quality %, Cu:0.02 quality %, Cr:0.04 quality %, Ti:0.02 quality %, remainder Al and, make ingot bar by continuous casting by aluminium alloy (alloy 2) dissolving that Mg:4.85 quality %, Mn:0.45 quality %, Fe:0.23 quality %, Si:0.16 quality %, Cu:0.09 quality %, Cr:0.03 quality %, Ti:0.02 quality %, remainder Al constitute.Then, this ingot bar is carried out 4 hours the processing that homogenizes under 510 ℃ temperature, carry out hot rolling then, make the sheet material that thickness of slab is 2.8mm.Then, be 1mm by cold rolling to thickness of slab after, under 420 ℃ temperature, carry out process annealing.Then, carry out finally cold rolling, to thickness of slab be 0.18mm.
This sheet material is carried out alkali degreasing, then, as table 1 to being provided with the 1st layer shown in the table 4, then, as the 2nd layer, adopt the cylinder cladding process to apply the coating of table 1 to composition shown in the table 4, making dried thickness is given thickness, heat drying under 200 ℃ temperature, thus obtained applying the test materials of synthetic resins overlay film.In addition, the embodiment 1 to 13 shown in following table 1 and the table 2 uses alloy 1, and reference example 14 uses alloy 2.In addition, for relatively, replace the synthetic resins overlay film also to prepare the material that the anodic oxidation overlay film is set.
Table 1
| The 1st layer | The 2nd layer | |||||||||
| Kind | Adhesion amount (mg/m 2) (Cr conversion) | Synthetic resins | Inorganic particles | Lubricant | Thickness (μ m) | |||||
| Kind | Weight part | Kind | Median size (μ m) | Weight portion | Kind | Weight part | ||||
| Embodiment 1 | The Plessy's green hydrochlorate | 20 | Acrylate modified polyester is a urethane resin | 100 | Talcum | 1 | 10 | Oxidic polyethylene system | 1.5 | 1 |
| Embodiment 2 | The application type chromic salt | 20 | Acrylate modified polyester is a urethane resin | 100 | Talcum | 1 | 10 | Oxidic polyethylene system | 1.5 | 1 |
| Embodiment 3 | The application type | 5 | Acrylate modified polyester is a urethane resin | 100 | Talcum | 1 | 10 | Oxidic polyethylene system | 1.5 | 1 |
| Embodiment 4 | The application type chromic salt | 50 | Acrylate modified polyester is a urethane resin | 100 | Talcum | 1 | 10 | Oxidic polyethylene system | 1.5 | 1 |
| | The application type chromic salt | 20 | Acrylate modified polyester is a urethane resin | 100 | Talcum | 10 | 10 | Oxidic polyethylene system | 1.5 | 1 |
| Embodiment 6 | The application type chromic salt | 20 | Acrylate modified polyester is a urethane resin | 100 | Colloidal silica | 0.1 | 10 | Oxidic polyethylene system | 1.5 | 1 |
| Embodiment 7 | The application type chromic salt | 20 | Acrylate modified polyester is a urethane resin | 100 | Mica | 1 | 10 | Oxidic polyethylene system | 1.5 | 1 |
| Embodiment 8 | The application type chromic salt | 20 | Acrylate modified polyester is a urethane resin | 100 | Talcum | 1 | 5 | Oxidic polyethylene system | 1.5 | 1 |
| Embodiment 9 | The application type chromic salt | 20 | Acrylate modified polyester is a urethane resin | 100 | Talcum | 1 | 20 | Oxidic polyethylene system | 1.5 | 1 |
Table 2
| The 1st layer | The 2nd layer | |||||||||
| Kind | Adhesion amount (mg/m 2) (Cr conversion) | Synthetic resins | Inorganic particles | Lubricant | Thickness (μ m) | |||||
| Kind | Weight part | Kind | Median size (μ m) | Weight part | Kind | Weight part | ||||
| Embodiment 10 | The application type chromic salt | 20 | Acrylate modified polyester is a urethane resin | 100 | Talcum | 1 | 10 | Oxidic polyethylene system | 0.5 | 1 |
| Embodiment 11 | The application type chromic salt | 20 | Acrylate modified polyester is a urethane resin | 100 | Talcum | 1 | 10 | Oxidic polyethylene system | 3.0 | 1 |
| Embodiment 12 | The application type chromic salt | 20 | Acrylate modified polyester is a urethane resin | 100 | Talcum | 1 | 10 | Oxidic polyethylene system | 1.5 | 0.5 |
| Embodiment 13 | The application type chromic salt | 20 | Acrylate modified polyester is a urethane resin | 100 | Talcum | 1 | 10 | Oxidic polyethylene system | 1.5 | 3 |
| Reference example 14 | The Plessy's green hydrochlorate | 20 | Acrylate modified polyester is a urethane resin | 100 | Talcum | 1 | 10 | Oxidic polyethylene system | 1.5 | 1 |
| Comparative example 7 | Do not have | - | Do not have | - | Do not have | - | - | Do not have | - | 0 |
| Comparative example 8 | Do not have | - | Acrylate modified polyester is a urethane resin | 100 | Talcum | 1 | 10 | Oxidic polyethylene system | 1.5 | 1 |
| Comparative example 9 | The application type chromic salt | 1 | Acrylate modified polyester is a urethane resin | 100 | Talcum | 1 | 10 | Oxidic polyethylene system | 1.5 | 1 |
| Comparative example 10 | The application type chromic salt | 100 | Acrylate modified polyester is a urethane resin | 100 | Talcum | 1 | 10 | Oxidic polyethylene system | 1.5 | 1 |
| Comparative example 11 | The application type chromic salt | 20 | Polyester is a urethane resin | 100 | Talcum | 1 | 10 | Oxidic polyethylene system | 1.5 | 1 |
Table 3
| The 1st layer | The 2nd layer | |||||||||
| Kind | Adhesion amount (mg/m 2) (Cr conversion) | Synthetic resins | Inorganic particles | Lubricant | Thickness (μ m) | |||||
| Kind | Weight part | Kind | Median size (μ m) | Weight part | Kind | Weight part | ||||
| Comparative example 12 | The application type chromic salt | 20 | Acrylic resin | 100 | Talcum | 1 | 10 | Oxidic polyethylene system | 1.5 | 1 |
| Comparative example 13 | The application type chromic salt | 20 | Acrylic acid epoxy is a resin | 100 | Talcum | 1 | 10 | Oxidic polyethylene system | 1.5 | 1 |
| Comparative example 14 | The application type chromic salt | 20 | The polymer vinylite | 100 | Talcum | 1 | 10 | Oxidic polyethylene system | 1.5 | 1 |
| Comparative example 15 | The application type chromic salt | 20 | Acrylate modified polyester is a urethane resin | 100 | Do not have | - | - | Oxidic polyethylene system | 1.5 | 1 |
| Comparative example 16 | The application type chromic salt | 20 | Acrylate modified polyester is a urethane resin | 100 | Talcum | 20 | 10 | Oxidic polyethylene system | 1.5 | 1 |
| Comparative example 17 | The application type chromic salt | 20 | Acrylate modified polyester is a urethane resin | 100 | Talcum | 1 | 1 | Oxidic polyethylene system | 1.5 | 1 |
| Comparative example 18 | The application type chromic salt | 20 | Acrylate modified polyester is a urethane resin | 100 | Talcum | 1 | 50 | Oxidic polyethylene system | 1.5 | 1 |
| Comparative example 19 | The application type chromic salt | 20 | Acrylate modified polyester is a urethane resin | 100 | Talcum | 1 | 10 | Do not have | - | 1 |
| Comparative example 20 | The application type chromic salt | 20 | Acrylate modified polyester is a urethane resin | 100 | Talcum | 1 | 10 | Oxidic polyethylene system | 0.1 | 1 |
Table 4
| The 1st layer | The 2nd layer | |||||||||
| Kind | Adhesion amount (mg/m 2) (Cr conversion) | Synthetic resins | Inorganic particles | Lubricant | Thickness (μ m) | |||||
| Kind | Weight part | Kind | Median size (μ m) | Weight part | Kind | Weight part | ||||
| Comparative example 21 | The application type chromic salt | 20 | Acrylate modified polyester is a urethane resin | 100 | Talcum | 1 | 10 | Oxidic polyethylene system | 10 | 1 |
| Comparative example 22 | The application type chromic salt | 20 | Acrylate modified polyester is a urethane resin | 100 | Talcum | 1 | 10 | Crystallite system | 1.5 | 1 |
| Comparative example 23 | The application type chromic salt | 20 | Acrylate modified polyester is a urethane resin | 100 | Talcum | 1 | 10 | Fluorine system | 1.5 | 1 |
| Comparative example 24 | The application type chromic salt | 20 | Acrylate modified polyester is a urethane resin | 100 | Talcum | 1 | 10 | Lanolin | 1.5 | 1 |
| Comparative example 25 | The application type chromic salt | 20 | Acrylate modified polyester is a urethane resin | 100 | Talcum | 1 | 10 | Oxidic polyethylene system | 1.5 | 0.1 |
| Comparative example 26 | The application type chromic salt | 20 | Acrylate modified polyester is a urethane resin | 100 | Talcum | 1 | 10 | Oxidic polyethylene system | 1.5 | 10 |
| Comparative example 27 | Do not have | - | The anodic oxidation treatment overlay film | 3 | ||||||
To the test materials that obtains,, carry out following mensuration for the evaluating material characteristic.Its measurement result and evaluation result arrive shown in the table 8 as following table 5.
Table 5
| Pencil hardness | Oilness (frictional coefficient) | Anti-defect | Punching processing | Bendability | Anti-solvent solubility (mg/dm 2) | Printing | ||||
| Cutting knife pointed shape R(μ m) | Change amount (μ m) | |||||||||
| Initial stage | After 200,000 impacts | Initial stage | After 200,000 impacts | |||||||
| Embodiment 1 | 6H | 0.07 | ◎ | 4.0 | 5.3 | 3.1 | 4.0 | ◎ | 0 | 100/100 |
| Embodiment 2 | 6H | 0.07 | ◎ | 4.0 | 5.3 | 3.1 | 4.0 | ◎ | 0 | 100/100 |
| Embodiment 3 | 6H | 0.07 | ◎ | 4.0 | 5.3 | 3.1 | 4.0 | ◎ | 0 | 100/100 |
| Embodiment 4 | 6H | 0.07 | ◎ | 4.0 | 5.3 | 3.1 | 4.0 | ◎ | 0 | 100/100 |
| | 6H | 0.07 | ◎ | 4.0 | 5.5 | 3.1 | 4.5 | ◎ | 0 | 100/100 |
| Embodiment 6 | 5H | 0.07 | ○ | 4.0 | 5.7 | 3.1 | 4.9 | ◎ | 0 | 100/100 |
| Embodiment 7 | 5H | 0.07 | ○ | 4.0 | 5.4 | 3.1 | 4.4 | ◎ | 0 | 100/100 |
| Embodiment 8 | 5H | 0.07 | ○ | 4.0 | 5.1 | 3.1 | 3.9 | ◎ | 0 | 100/100 |
| Embodiment 9 | 7H | 0.07 | ◎ | 4.0 | 5.4 | 3.1 | 4.4 | ◎ | 0 | 100/100 |
Table 6
| Pencil hardness | Oilness (frictional coefficient) | Anti-defect | Punching processing | Bendability | Anti-solvent solubility (mg/dm 2) | Printing | ||||
| Cutting knife pointed shape R (μ m) | Change amount (μ m) | |||||||||
| Initial stage | After 200,000 impacts | Initial stage | After 200,000 impacts | |||||||
| Embodiment 10 | 6H | 0.09 | ○ | 4.0 | 5.5 | 3.1 | 4.5 | ◎ | 0 | 100/100 |
| Embodiment 11 | 6H | 0.05 | ◎ | 4.0 | 5.2 | 3.1 | 3.8 | ◎ | 0 | 100/100 |
| Embodiment 12 | 5H | 0.07 | ○ | 4.0 | 5.4 | 3.1 | 4.3 | ◎ | 0 | 100/100 |
| Embodiment 13 | 6H | 0.07 | ◎ | 4.0 | 5.2 | 3.1 | 3.9 | ◎ | 0 | 100/100 |
| Reference example 14 | 6H | 0.07 | ◎ | 4.0 | 5.4 | 3.1 | 5.5 | ◎ | 0 | 100/100 |
| Comparative example 7 | 2H | 0.50 | × | 4.0 | 8.0 | 3.1 | 11.2 | ◎ | 0 | 0/100 |
| Comparative example 8 | 5H | 0.07 | ○ | 4.0 | 5.5 | 3.1 | 4.6 | × | 0 | 100/100 |
| Comparative example 9 | 5H | 0.07 | ○ | 4.0 | 5.4 | 3.1 | 4.4 | △ | 0 | 100/100 |
| Comparative example 10 | 6H | 0.07 | ◎ | 4.0 | 5.3 | 3.1 | 4.0 | △ | 0 | 100/100 |
| Comparative example 11 | 6H | 0.07 | ◎ | 4.0 | 5.3 | 3.1 | 4.0 | ◎ | 0 | 10/100 |
Table 7
| Pencil hardness | Oilness (frictional coefficient) | Anti-defect | Punching processing | Bendability | Anti-solvent solubility (mg/dm 2) | Printing | ||||
| Cutting knife pointed shape R (μ m) | Change amount (μ m) | |||||||||
| Initial stage | After 200,000 impacts | Initial stage | After 200,000 impacts | |||||||
| Comparative example 12 | 4H | 0.07 | △ | 4.0 | 5.3 | 3.1 | 4.0 | ○ | 2 | 50/100 |
| Comparative example 13 | 4H | 0.07 | △ | 4.0 | 5.3 | 3.1 | 4.0 | ○ | 4 | 10/100 |
| Comparative example 14 | 4H | 0.07 | △ | 4.0 | 5.3 | 3.1 | 4.0 | ◎ | 0 | 80/100 |
| Comparative example 15 | 4H | 0.07 | △ | 4.0 | 5.1 | 3.1 | 3.8 | ◎ | 0 | 100/100 |
| Comparative example 16 | 6H | 0.07 | ◎ | 4.0 | 5.5 | 3.1 | 4.2 | △ | 0 | 100/100 |
| Comparative example 17 | 4H | 0.07 | △ | 4.0 | 5.2 | 3.1 | 3.9 | ◎ | 0 | 100/100 |
| Comparative example 18 | 7H | 0.07 | ◎ | 4.0 | 5.6 | 3.1 | 4.9 | △ | 0 | 100/100 |
| Comparative example 19 | 5H | 0.15 | △ | 4.0 | 7.5 | 3.1 | 9.8 | ◎ | 0 | 100/100 |
| Comparative example 20 | 5H | 0.13 | △ | 4.0 | 7.2 | 3.1 | 9.5 | ◎ | 0 | 100/100 |
Table 8
| Pencil hardness | Oilness (frictional coefficient) | Anti-defect | Punching processing | Bendability | Anti-solvent solubility (mg/dm 2) | Printing | ||||
| Cutting knife pointed shape R (μ m) | Change amount (μ m) | |||||||||
| Initial stage | After 200,000 impacts | Initial stage | After 200,000 impacts | |||||||
| Comparative example 21 | 6H | 0.05 | ◎ | 4.0 | 5.1 | 3.1 | 3.9 | ◎ | 0 | 50/100 |
| Comparative example 22 | 5H | 0.09 | △ | 4.0 | 5.4 | 3.1 | 4.2 | ◎ | 0 | 90/100 |
| Comparative example 23 | 5H | 0.11 | △ | 4.0 | 5.5 | 3.1 | 4.5 | ◎ | 0 | 20/100 |
| Comparative example 24 | 5H | 0.12 | △ | 4.0 | 5.6 | 3.1 | 4.7 | ◎ | 0 | 50/100 |
| Comparative example 25 | 4H | 0.07 | △ | 4.0 | 5.5 | 3.1 | 4.5 | ◎ | 0 | 100/100 |
| Comparative example 26 | 5H | 0.07 | ○ | 4.0 | 5.4 | 3.1 | 4.2 | △ | 0 | 100/100 |
| Comparative example 27 | 7H | 0.20 | ○ | 4.0 | 5.8 | 3.1 | 5.2 | △ | 0 | 100/100 |
Pencil hardness to material surface is measured by the pencil scratch-hardness test of JISK5400.
Oilness to material surface, use Bauden (バ ウ デ Application) to adhere to the sliding test machine, making diameter is the steel ball contact test material surface of 4.23mm, change the position by increasing the weight of 200g, slide repeatedly for 3 times back and forth with the speed of 4mm/ second simultaneously, the average slip by at this moment increases the weight of to obtain frictional coefficient.
In addition, to the anti-defect of material surface, use Bauden to adhere to the sliding test machine, making diameter is the steel ball contact test material surface of 4.23mm, slip over same position by increasing the weight of 200g repeatedly with the speed of 4mm/ second, be determined at the slip number of times that produces flaw on the test materials surface.This slip number of times surpasses 20 times, and anti-defect is very good, is evaluated as ◎, and the slip number of times surpasses 10 times, and anti-defect is good, is evaluated as zero, and the slip number of times is 2 to 10 times the △ that is evaluated as, the slip number of times be being evaluated as below 1 time *.
To the punching processibility, under the condition shown in the following table 13, carry out the continuous cutting-off processing experiment, measure the variation and the change amount of cutting knife pointed shape (R).In the continuous cutting-off processing experiment, use low viscous volatility pressure machine oil AF-2A (the emerging product of bright dipping (strain) system) as pressure machine oil, being coated with oil mass is 1g/m
2In addition, use SKD11 (JIS) as the material of parting tool (cutting knife), the gap of cutting knife is set at 20 μ m.And, be 300cm/ minute as process velocity, running length is 3mm, cutting length is 30mm.Cutting knife pointed shape (R) adopts the little slope institute system of shape measuring apparatus (SED36D:(strain); Contact pilotage R=2 μ m) measures.In addition, change the size of flow measurement from the protuberance shown in the cut-out portion section shape synoptic diagram of Fig. 4 to the burr point.In addition, it is 200,000 impacts (シ ョ Star ト) that continuous cutting-off adds number, cutting knife pointed shape (R) and change amount after the mensuration initial stage and 200,000 impacts.
For bendability, carrying out with the thickness of slab of test materials is the 90 °-0R pliability test of bending radius, adopts 50 to 200 times entity microscope observing curved part, by the state of rupture evaluation of curved part.As evaluation, on overlay film, do not break and overlay film and inorganic particles are not peeled off is evaluated as ◎, though have on the overlay film slightly break overlay film and inorganic particles do not peel off be evaluated as zero, some overlay films and inorganic particles are peeled off is evaluated as △, and the extent of exfoliation of overlay film and inorganic particles is serious is evaluated as *.
For anti-solvent solubility, by test materials being immersed in ebullient 1,1, in the 1-trieline, being determined at and applying hyperacoustic overlay film weight reduction of flooding simultaneously after 6 minutes and carry out.
For printing, the UV printing is carried out on the test materials surface below under the condition shown in the table 9, at room temperature place 24 hours after, estimate the UV print surface by grid band stripping test (JISH4001).
Table 9
| The UV curable ink | Urethane acrylate is UV printing ink (Seicoradobans (strain) system) | |
| Sieve aperture No. | 350 | |
| The UV illuminate condition | The UV exposure intensity | 120W/cm |
| The UV irradiation time | 3 seconds | |
By this table 5 to table 8 as can be known, because embodiment 1 to embodiment 13 within the scope of the invention, therefore, pencil hardness is more than 5H, and anti-defect aspect has good characteristic.In addition,, almost can't see the increase of cutting knife pointed shape (R) and change amount, have good characteristic as for punching processing.In addition, bendability, anti-solvent solubility and printing aspect also have excellent characteristic.
Comparative example 7 is owing to be the non-processor material that layers 1 and 2 is not set, thereby anti-defect and printing are insufficient.In addition, punching processing is also insufficient, is thinking the increase that has burr aspect the continuous cutting-off processing.Comparative example 8 is not owing to be provided as the 1st layer chromic salt overlay film, thereby the adaptation of synthetic resins overlay film is insufficient, can see peeling off of overlay film in the bending machining part.Comparative example 9 is because the chromium adhesion amount of chromic salt overlay film is 1mg/m
2, insufficient, thereby the adaptation of synthetic resins overlay film is insufficient, can see peeling off of overlay film in the bending machining part.Comparative example 10 is because the chromium adhesion amount of chromic salt overlay film is 100mg/m
2, too much, thereby during bending machining, originally produce on one's body at the chromic salt overlay film and to break, on the synthetic resins overlay film, also produce with this as the starting point and break, and can see at generation disruptive position and to peel off.Comparative example 11 is not because the polyester urethane resin carries out acrylate modifiedly, thereby printing is insufficient.Comparative example 12 is owing to adopt acrylic resin as synthetic resins, thereby anti-defect, anti-solvent solubility and printing deficiency.Comparative example 13 since adopt acrylic acid epoxy be resin as synthetic resins, thereby anti-defect, anti-solvent solubility and printing deficiency.Comparative example 14 is owing to adopt the polymer vinylite as synthetic resins, thereby anti-defect and printing deficiency.Comparative example 15 is not owing to contain inorganic particles in the synthetic resins overlay film, thereby anti-defect deficiency.The median size of comparative example 16 inorganic particles is 20 μ m, the hypopexy of inorganic particles in the synthetic resins overlay film, and the bending machining part inorganic particles when bending machining comes off easily.Comparative example 17 is because the content of inorganic particles is very few, thereby anti-defect deficiency.Comparative example 18 is because the content of inorganic particles is too much, thereby the superfluous hypopexy of inorganic particles in the synthetic resins overlay film, the problem that the bending machining when bending machining partly exists inorganic particles to come off.Comparative example 19 is not owing to contain the oxidic polyethylene base lubricant in the synthetic resins overlay film, thereby anti-defect deficiency, and punching processing reduction simultaneously can be seen the increase of burr in continuous cutting-off processing.Comparative example 20 is owing to the content of oxidic polyethylene base lubricant in the synthetic resins overlay film is few, thereby anti-defect deficiency, and punching processing reduction simultaneously can be seen the increase of burr in continuous cutting-off processing.Comparative example 21 is owing to the content of oxidic polyethylene base lubricant in the synthetic resins overlay film is too much, thereby the printing deficiency.Comparative example 22,23 and 24 is owing to use lubricant outside the oxidic polyethylene base lubricant as the lubricant in the synthetic resins overlay film, thereby anti-defect deficiency, and in addition, printing is also not enough.Comparative example 25 is because the thickness of synthetic resins overlay film is thin, thereby anti-defect deficiency.Comparative example 26 is because the thickness of synthetic resins overlay film is excessive, thereby the internal stress of the overlay film that forms becomes too high, and the adaptation of overlay film reduces, and peels off easily at bending machining part overlay film.Comparative example 27 is owing to be provided with the anodic oxidation overlay film, thus bending machining part overlay film break and also the part peeled off harmful to the magnetic face.
Embodiment 2
Below with the scope of the invention outside comparative example compare, the characteristic of the embodiment of the invention 2 is described.
Have the aluminium alloy of forming shown in the following table 10 by the ordinary method dissolving, make ingot bar by continuous casting.Then, under 510 ℃ temperature, this ingot bar is carried out the processing that homogenized in 4 hours, carry out hot rolling then, make the sheet material that thickness of slab is 2.8mm.Then, be 1mm by cold rolling to thickness of slab after, under 420 ℃ temperature, carry out process annealing.Then, finally be cold-rolled to thickness of slab 0.18mm, according to circumstances,, carry out stabilization treatment at final cold rolling after annealing.In addition, the composition of embodiment 1 to 4 is in the scope of the present invention's regulation, and the composition of comparative example 1 to 6 is outside scope of the present invention.Comparative example 7 and 8 is a composition similarly to Example 1.
Following table 11 is illustrated in chromic salt overlay film and the resin that forms on the aluminium alloy plate surface that obtains.The sheet material that obtains is as mentioned above carried out alkali degreasing, and afterwards, embodiment 1 to 4 and comparative example 1 to 6 are by the chromic salt overlay film of phosphoric acid chromate treating formation as the 1st layer, and making and being converted into the chromium adhesion amount is 20mg/m
2, then, apply the coating formed shown in the following table 2 as the 2nd layer by the cylinder cladding process, making dried thickness is 1 μ m, carries out heat drying under 200 ℃ temperature, thereby has obtained applying the test materials of synthetic resins overlay film.In addition, the adhesion amount of the chromic salt overlay film of comparative example 7 and 8, the 1 layers is different with other embodiment and comparative example, implements the formation method by applying simultaneously, and the 2nd layer formation condition is identical with other.In addition, coated conditions is also identical with other embodiment and comparative example.
Table 10
| Chemical constitution (quality %) | Stabilization treatment | |||
| Fe | Mn | Mg | ||
| Embodiment 1 | 0.19 | 0.47 | 2.75 | Do not have |
| Embodiment 2 | 0.19 | 0.45 | 2.30 | Do not have |
| Embodiment 3 | 0.19 | 0.37 | 2.75 | Do not have |
| Embodiment 4 | 0.35 | 0.47 | 2.75 | Do not have |
| Comparative example 1 | 0.19 | 0.47 | 2.75 | 300℃ |
| Comparative example 2 | 0.23 | 0.45 | 4.85 | 240℃ |
| Comparative example 3 | 0.22 | 0.08 | 2.25 | Do not have |
| Comparative example 4 | 0.61 | 0.01 below | 0.01 below | Do not have |
| Comparative example 5 | 0.19 | 0.80 | 2.75 | Do not have |
| Comparative example 6 | 0.65 | 0.47 | 2.75 | Do not have |
| Comparative example 7 | 0.19 | 0.47 | 2.75 | Do not have |
| Comparative example 8 | 0.19 | 0.47 | 2.75 | Do not have |
Table 11
| The 1st layer | The 2nd layer | |||||||||
| Kind | Adhesion amount (mg/m 2) (Cr conversion) | Synthetic resins | Inorganic particles | Lubricant | Thickness (μ m) | |||||
| Kind | Weight part | Kind | Median size (μ m) | Weight part | Kind | Weight part | ||||
| Embodiment 1～4 | The Plessy's green hydrochlorate | 20 | Acrylate modified polyester is a urethane resin | 100 | Talcum | 1 | 10 | Oxidic polyethylene system | 1.5 | 1 |
| Comparative example 1～6 | The Plessy's green hydrochlorate | 20 | Acrylate modified polyester is a urethane resin | 100 | Talcum | 1 | 10 | Oxidic polyethylene system | 1.5 | 1 |
| Comparative example 7 | The application type chromic salt | 1 | Acrylate modified polyester is a urethane resin | 100 | Talcum | 1 | 10 | Oxidic polyethylene system | 1.5 | 1 |
| Comparative example 8 | The application type chromic salt | 100 | Acrylate modified polyester is a urethane resin | 100 | Talcum | 1 | 10 | Oxidic polyethylene system | 1.5 | 1 |
In order to estimate integrally stretching intensity, punching processing and bendability, the test materials that obtains is carried out following mensuration respectively.Its measurement result and evaluation are shown in following table 12.
Table 12
| Integrally stretching intensity (MPa) | Punching processing | Product rigidity | Bendability | ||||
| Cutting knife pointed shape (R) (μ m) | Change amount (μ m) | Whereabouts shock test (individual/10) | 90 °-0R bending | ||||
| Initial stage | After 200,000 impacts | Initial stage | After 200,000 impacts | ||||
| Embodiment 1 | 320 | 4.0 | 5.3 | 3.1 | 4.0 | 0/10 | ○ |
| Embodiment 2 | 305 | 4.0 | 5.2 | 3.1 | 3.9 | 0/10 | ○ |
| Embodiment 3 | 315 | 4.0 | 5.3 | 3.0 | 3.9 | 0/10 | ○ |
| Embodiment 4 | 322 | 4.0 | 5.4 | 3.2 | 4.2 | 0/10 | ○ |
| Comparative example 1 | 200 | 4.0 | 5.1 | 3.4 | 4.1 | 5/10 | ○ |
| Comparative example 2 | 380 | 4.0 | 10.0 | 3.0 | 14.2 | 0/10 | ○ |
| Comparative example 3 | 290 | 4.0 | 7.8 | 3.2 | 10.8 | 2/10 | ○ |
| Comparative example 4 | 170 | 4.0 | 5.0 | 3.5 | 4.3 | 8/10 | ○ |
| Comparative example 5 | 335 | 4.0 | 5.4 | 3.3 | 4.2 | 0/10 | △ |
| Comparative example 6 | 325 | 4.0 | 5.5 | 3.4 | 4.4 | 0/10 | △ |
| Comparative example 7 | 320 | 4.0 | 5.4 | 3.1 | 4.4 | 0/10 | △ |
| Comparative example 8 | 320 | 4.0 | 5.3 | 3.1 | 4.0 | 0/10 | △ |
To integrally stretching intensity, carry out tension test by making JIS5 test film and try to achieve.
Table 13
| Pressure machine oil | AF-2A (the emerging product of bright dipping (strain) system) |
| Be coated with oil mass | 1g/m 2 |
| The parting tool material | SKD11(JIS) |
| Process velocity | The 300cm/ branch |
| Running length | 3mm |
| Cutting length | 30mm |
To the punching processibility, under the condition shown in the above-mentioned table 13, implement the continuous cutting-off processing experiment, measure the variation and the change amount of cutting knife pointed shape (R).In the continuous cutting-off processing experiment, use low viscous volatility pressure machine oil AF-2A (the emerging product of bright dipping (strain) system) as pressure machine oil, being coated with oil mass is 1g/m
2In addition, use SKD11 (JIS) as the material of parting tool (cutting knife), the gap of cutting knife is set at 20 μ m.And process velocity is 300cm/ minute, and running length is 3mm, and cutting length is 30mm.Cutting knife pointed shape (R) adopts the little slope institute system of shape measuring apparatus (SED36D:(strain); Contact pilotage R=2 μ m) measures.In addition, change the size of flow measurement from the protuberance shown in the cut-out portion section shape synoptic diagram of Fig. 4 to the burr point.In addition, it is 200,000 impacts that continuous cutting-off adds number, measures cutting knife pointed shape (R) and change amount after A-stage and 200,000 is impacted.
For product rigidity, the test materials that makes is processed into shape shown in Figure 2, make shutter after, this shutter is assembled on the floppy disk housing shown in Figure 1, from the height of distance floor 1m it is fallen, make the bump floor, bight of floppy disk housing shown in Figure 1, estimate thus.Evaluation is by each carries out n=10 and calculates the shutter distortion and carry out from the number that housing comes off to each test materials.
For bendability, carrying out with the thickness of slab of test materials is the 90 °-0R pliability test of bending radius, with 50 to 200 times entity microscope observing curved part, is estimated by the state of rupture of curved part.As evaluation, do not have disruptive to be evaluated as zero, have small disruptive to be evaluated as △, have big disruptive be evaluated as *.
As shown in table 3, embodiment 1 within the scope of the present invention, integrally stretching intensity is 300 to the scope of 350MPa, so punching processing is good, continuous cutting-off processing back cutting knife pointed shape (R) changes hardly, also can't see the increase of burr.In addition, even in the impact test of whereabouts, shutter is also indeformable to come off from housing, has sufficient product rigidity.Though the composition of comparative example 1 within the scope of the invention, because the Heating temperature height of stabilization treatment, integrally stretching intensity is 200MPa, be lower than scope of the present invention, though punching processing is good, the shutter distortion comes off the product rigidity deficiency in the impact test of whereabouts.Comparative example 2 is because integrally stretching intensity is 380MPa, and is too high, thereby product rigidity is good, but punching processing is poor, can see that in continuous cutting-off processing cutting knife pointed shape (R) increases, and in addition, also can see the increase of burr thereupon.The integrally stretching intensity of comparative example 3 is low to moderate 290MPa, the product rigidity deficiency, simultaneously, aspect composition, the Al-Fe-Mn that does not also have abundant generation can improve cuttability is a crystallisate, so cuttability is poor, in continuous cutting-off processing, can see the increase of cutting knife pointed shape (R), in addition, also can see the increase of burr thereupon.The integrally stretching intensity of comparative example 4 is 170MPa, and outside scope of the present invention, though punching processing is good, in the impact test of whereabouts, the shutter distortion comes off the product rigidity deficiency.Comparative example 5 is because the addition of Mn is too much, thereby the generation quantity of the generation of huge crystallisate and crystallisate increases, and plasticity reduces, and therefore aspect bendability, produces small breaking, bendability deficiency at curved part.Comparative example 6 is because the addition of Fe is too much, thereby the generation quantity of the generation of huge crystallisate and crystallisate increases, and plasticity reduces, and therefore, aspect bendability, produces small breaking, bendability deficiency at curved part.Comparative example 7 is very few owing to the chromic salt overlay film, thereby aspect bendability, produces small breaking, bendability deficiency at curved part.Comparative example 8 is too much owing to the chromic salt overlay film, thereby aspect bendability, produces small breaking, bendability deficiency at curved part.
Claims (3)
1, a kind of switching is arranged at the open-and-close device made of aluminium alloy plate of the record-header usefulness window portion on the housing that holds recording medium, form by following material: aluminium alloy base plate, above-mentioned aluminium alloy contains Mg:2.2 to 2.8 quality %, Mn:0.35 to 0.55 quality % and Fe:0.1 to 0.4 quality %; As the chromic salt overlay film of the 1st layer of setting, it is 5 to 50mg/m that above-mentioned chromic salt overlay film is arranged to be scaled the chromium adhesion amount on the surface of the shutter exterior side that forms above-mentioned recording medium shell at least of above-mentioned aluminium alloy base plate
2And on above-mentioned shutter exterior side, be the overlay film that urethane resin constitutes by acrylate modified polyester as the 2nd layer of setting, above-mentioned is that the overlay film thickness that urethane resin constitutes is 0.5 to 3 μ m by acrylate modified polyester, with with respect to aforesaid propylene acid esters modified poly ester be urethane resin 100 weight parts be the ratio of 5 to 20 weight parts to contain median size be inorganic particles below the 10 μ m, being that urethane resin 100 weight parts are that the ratio of 0.5 to 3 weight part contains the oxidic polyethylene base lubricant with respect to aforesaid propylene acid esters modified poly ester.
2, open-and-close device made of aluminium alloy plate as claimed in claim 1, wherein, above-mentioned inorganic particles is to be selected from least a in colloidal silica, talcum and the mica.
3, open-and-close device made of aluminium alloy plate as claimed in claim 1, wherein, the tensile strength of above-mentioned aluminium alloy plate is 300 to 350MPa.
Applications Claiming Priority (4)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2001058943A JP2002260361A (en) | 2001-03-02 | 2001-03-02 | Aluminum alloy sheet for recording medium case shutter |
| JP2001058943 | 2001-03-02 | ||
| JP2001076850A JP4108284B2 (en) | 2001-03-16 | 2001-03-16 | Aluminum alloy plate for shutter of recording medium case |
| JP2001076850 | 2001-03-16 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1386880A CN1386880A (en) | 2002-12-25 |
| CN1245529C true CN1245529C (en) | 2006-03-15 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 02106723 Expired - Fee Related CN1245529C (en) | 2001-03-02 | 2002-03-04 | Open-and-close device made of aluminium alloy plate for recording medium shell |
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| Country | Link |
|---|---|
| CN (1) | CN1245529C (en) |
| TW (1) | TW554048B (en) |
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- 2002-03-01 TW TW91103834A patent/TW554048B/en active
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