CN1109602A - Ferrite ball type carrier for duplicator and its producing technology - Google Patents
Ferrite ball type carrier for duplicator and its producing technology Download PDFInfo
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- CN1109602A CN1109602A CN 94110165 CN94110165A CN1109602A CN 1109602 A CN1109602 A CN 1109602A CN 94110165 CN94110165 CN 94110165 CN 94110165 A CN94110165 A CN 94110165A CN 1109602 A CN1109602 A CN 1109602A
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Abstract
The present invention relates to a ferrite ball carrier for duplicating machine. It is made up by using nickel-zinc ferrite as main raw material. The weight percentage of its ingredients is as follows: 55-75% of Fe2O3, 15-25% of ZnO, 3-10% of NiO, 2-5% of CuO, 2-3% of CoO, 1.5-5% of MnCO3 and 0.1-0.8% of SiO2. The above-mentioned raw materials are mixed by using dry method for 2-35 h., and then the mixed materials are placed in a sintering furnace, and roasted, and its roasting temp. is 1200-1400 deg.C, and its roasting time is 2-8 h.. After having been roasted those materials are pulverized to below 100 micrometers, and then mixed with 0.5-1 wt% of polyvinyl alcohol solution, and uniformly kneaded, and dried in dry box, and after having been dried those materials are pulverized, and screened into the passable material with -150 micrometers to +150 micrometers, and then the passable material is passed through such processes of high-temp. flame treatment at 1500-1950 deg.C, granulat....
Description
The developing technique double component developing that the invention belongs to duplicating machine is with ferrite ball type carrier and manufacturing process.
The used in copy machines carrier material is made in data at home and abroad introduction at present, and what extensively adopt is irregular iron powder and spherical iron powder.There is anisotropy in irregular iron powder carrier, makes the copy contrast bad, and therefore, magnetic roller surface has the duplicating machine in broad space to use this carrier with photosensitive drum surface; On the other hand, in order to improve contrast, obtain autotype preferably, adopted the spherical iron powder carrier, but also not very good, because the iron powder carrier is heavier, density is big (greater than 4.0g/cm
3), powder easily splashes, and escapes in order to prevent powder, needs left magnetic roller and duplicating machine coupling part to adopt a kind of design proposal of special complexity.Heavy iron powder carrier can produce high pressure when mixing with toner, influences the life-span of duplicating machine developer.Japan's publication communique, clear and 64-13157 have been announced technical institute of Kawasaki Steel Corp application " electronigraph agent carrier and method for making thereof " patent, and the ferrite of this technology mainly is a copper zinc-iron oxides body, and its chemical composition is SiO
2Weight ratio is 0.01～1.0%, and the chemical composition of residue is (Cu
1-xEn
xO)
2-y(Fe
2O
3)
y, 0.2≤x≤0.7,0.9≤y≤1.2 wherein.Its manufacturing process be with above-mentioned ferrite in advance after granulation, in 1150～1300 ℃ of temperature, temper the carrier that becomes the electronics developer.The publication number that EUROPEAN PATENT OFFICE announces is 0242712, application number is 87105199.1, name is called the invention of " carrier of electrophotography developing agent ", only introduce the xerox carrier material and comprised a spherical iron oxysome core and one deck resin-coating film, the concrete composition of its carrier does not illustrate, this patented claim has also been introduced manufacturing process and has been spray dried to granule then for disperseing ferrite and magnetic ferrites to blend together water slurry, took exercise 2 hours at 1200 ℃, levigate gently, get desired particle size (20～200 μ m) after the screening, coating becomes the duplicating machine carrier again.The publication number 441127 that EUROPEAN PATENT OFFICE announces, application number is 91100284.8, and denomination of invention is " carrier that coats with polyvinyl alcohol resin has only irregular surface ", and this patent is only being put down in writing the cladding process of carrier.In sum, making duplicating machine carrier material technology at present is: for the material wet mixing be fine lapping become water slurry to reach thoroughly to be mixed → spray drying makes granule → exercise → levigate → screening → coating.
The manufacture method that the present invention seeks to design a kind of novel carriers material prescription and this carrier material is provided.This carrier material is made up of a resin-coating layer a solid nickel-zinc ferrite spheric grain and spheric grain outside surface, and it has better magnetic properties.The manufacture method principal feature of this carrier material is to adopt dry method batch mixing and high temperature spheriodization process thereof.Adopt the carrier material of the electrophotography developing agent of above-mentioned prescription and manufacturing process can satisfy the requirement of bi-component used in copy machines spherical iron oxysome, can produce high-quality copy effectively, duplicate life-span and hard-copy file and reach more than 60000 times, can adapt to the variation of external condition, increase stability.
Ferrite ball type carrier for duplicator material of the present invention is made up of a resin-coating layer by the spheric grain and the spheric grain outside surface of principal ingredient a solid nickel-zinc ferrite.The chemical composition of nickel-zinc ferrite (percentage by weight) is: Fe
2O
3Be 55～75%, ZnO is 15～25%, and NiO is 3～10%, and CuO is 2～5%, and CoO is 2～3%, MnCO
3Be 1.5～5%, SiO
2Be 0.1～0.8%.The manufacturing process of this ferrite ball type carrier for duplicator is that the raw material that said ratio is good is packed into and carried out the dry method batch mixing in the batch mixer that has some steel balls not of uniform size.The weight ratio of material and steel ball is 3: 1, and steel ball size is three kinds of Φ 3, Φ 5 and Φ 10mm, and their ratio is respectively to account for 1/3rd.Mixing time is 2～35 hours, to be mixed to good.With sieve steel ball is cleared out of raw material when expecting the discharging of mixed back, it is 1200～1400 ℃ that the material that mixes is put into that sintering furnace takes exercise, tempers temperature, and exercise time is 2～8 hours, lowers the temperature with stove, comes out of the stove to room temperature.Temper good material thing and will be crushed to below the 100 μ m, the percentage by weight that will prepare in advance is that 0.5～1.0% poly-vinyl alcohol solution mixes with broken back powder to rub and evenly makes the dough shape and put into the drying baker drying again.Baking temperature is 100～120 ℃, take out after dry 8～16 hours, dried feed through sieve after the fragmentation once more-150 μ m to+50 μ m be accept.Accept is adopted high-temperature flame treatment at 1500～1950 ℃, under high temperature dissolves state, because surface tension effects, make the powder particle form spheric grain in moment, criticize through sieving, closing again, the spheric grain of getting-120 μ m to 54 μ m has promptly been made ferrite ball type carrier through coating, drying.Coat with infusion process with solution such as epoxy resin during coating, stir and use the hair-dryer drying with shovel while soaking, treat partial desiccation after, through the screening of 80 mesh sieves, put into the drying box drying again, baking temperature is 120 ℃, is incubated taking-up in 4 hours, has made carrier.
Adopt above-mentioned prescription and explained hereafter to go out the used in copy machines ferrite carrier and reach following effect after tested:
1) body resistivity: 10
9～10
13Ω cm;
2) saturated magnetization rate: 54～76em μ/g;
3) carried charge: 12.5～18.5 μ c/g;
4) duplicate the life-span: copy reaches more than 60000 times.
Adopt the present invention to have two advantages:
1. batch mixing has made dry method into by wet method.Produce the ferrite compounding process at present and generally all adopt wet method, be about to raw material and put into the batch mixing machine that medium is housed, medium is generally water or ethanol etc.The material by wet type mixing advantage is to mix, and shortcoming is to add the wet mixing medium in the batch mixing, and is strict to the batch mixer sealing system, and mixed material need increase the oven dry processing simultaneously, and the medium in the removing material is returned operation and brought trouble.Because the present invention adopts the dry method batch mixing in manufacturing process, cancelled medium, has saved the energy.Because the dry method batch mixing is not strict to the batch mixer seal request, reduce the manufacturing expense of batch mixer simultaneously, therefore used technology of the present invention to greatly reduce cost, simplified running program.
2. the present invention makes ferrite ball type carrier and has adopted high-temperature flame treatment.Produce at present ferrite and all adopt spray drying process or atomization, be about to raw material and make water slurry, ferrite is made spherical powder, make carrier material through technologies such as fine powder are broken then with spray dryer.But spray drying process or spray-on process are owing to carry out the broken operation of fine powder, and spheric grain changes sphericity easily through grinding again.And adopt the broken operation of thermal-flame spheroidising cancellation fine powder, and kept the original sphericity of particle, make good sphericity, the nodularization rate can reach 99%.
Be two embodiment of the present invention below:
1. with industrial balance raw material is weighed by prescription, the raw material proportioning of carrier is: Fe
2O
3: 68%, ZnO:19.1%, NiO:7%, CuO:2.0%, CoO:2%, SiO
2: 0.4%, MnCO
3: 1.5%.Above-mentioned confected materials is put into the batch mixer that steel ball is housed.Steel ball weight accounts for weight of material 1/3rd, and Φ 3, Φ 5, Φ 10mm steel ball weight respectively account for 1/3rd.Mixing time is 4 hours.Mixed material is removed steel ball through 40 mesh sieves, will expect then that thing is delivered in the stove to take exercise, and the exercise temperature is 1200 ℃, is incubated 2 hours, and furnace cooling to room temperature is taken out.The material that takes out carries out the fragmentation back and sieves with 150 mesh sieves, screen overflow return continue to be crushed to qualified till, the poly-vinyl alcohol solution that contains 0.5Wt% for preparing in advance and accept mixed to rub evenly become the dough shape to put into drying baker, oven dry is 10 hours under 120 ℃ of temperature, again the broken sieve of siccative being got-150 μ m～+ 50 μ m is accept, is under 1900 ℃ the high-temperature fusion, with irregular powder particle disposal globulate particle in temperature, spheric grain is handled screening, and coating, oven dry become carrier.Carrier is detected, and technical indicator is as follows:
1) saturation magnetization: 76em μ/g;
2) pine ratio: 2.6g/cm
3;
3) body resistivity: 3 * 10
13Ω cm
4) carried charge: 18.5 μ c/g
5) duplicate the life-span: 61818/kg developer.
2. with industrial balance raw material is weighed by prescription, the raw material proportioning of carrier is: Fe
2O
3: 74%, ZnO:15%, NiO:3%, CuO:3.5%, CoO:1.6%, MnCO
3: 2.7%, SiO
2: 0.2%.Above-mentioned confected materials is put into the batch mixer that steel ball is housed.Steel ball weight accounts for weight of material 1/3rd, and Φ 3, Φ 5, Φ 10mm steel ball weight respectively account for 1/3rd.Mixing time is 5 hours.Mixed material is removed steel ball through 40 mesh sieves, will expect then that thing is delivered in the stove to take exercise, and the exercise temperature is 1245 ℃, is incubated 3 hours, and furnace cooling to room temperature is taken out.The material that takes out carries out the fragmentation back and sieves with 150 mesh sieves, screen overflow return continue to be crushed to qualified till, the poly-vinyl alcohol solution that contains 0.5Wt% for preparing in advance and accept mixed to rub evenly become the dough shape to put into drying baker, oven dry is 12 hours under 110 ℃ of temperature, again the broken sieve of siccative being got-150 μ m～+ 50 μ m is accept, under 1850 ℃ of high-temperature fusion,, spheric grain screening, coating, oven dry are become carrier with irregular powder particle disposal globulate particle.Carrier is detected, and technical indicator is as follows:
1) saturation magnetization: 77.8em μ/g;
2) pine ratio: 2.59g/cm
3;
3) body resistivity: 3.5 * 10
11Ω cm
4) carried charge: 14.5 μ c/g
5) duplicate the life-span: 60327/kg developer.
Claims (2)
1, a kind of ferrite ball type carrier for duplicator, it is made up of by a solid ferrite ball type particle and spheric grain outside surface one resin-coating layer the center, a solid ferrite that it is characterized in that this carrier center is to be principal ingredient with the nickel-zinc ferrite, and its composition percentage by weight is: Fe
2O
3: 55～75%; ZnO:15～25%; NiO:3～10%; CuO:2～5%; C
oO:2～3%; MnCO
3: 1.5～5%; SiO
2: 0.1～0.8%.
2, a kind of ferrite ball type carrier for duplicator, the carrier manufacturing process that it is characterized in that it is to carry out the dry method batch mixing in the batch mixer that has steel ball of packing into according to the good nickel-zinc ferrite raw material of design mix proportioning, mixing time is 2～35 hours, to be mixed to good, with sieve steel ball is cleared out of raw material when expecting the discharging of mixed back, then mixed material is put into the sintering furnace calcination, calcination temperature is 1200～1400 ℃, the calcination time is 2～8 hours, and material is reduced to room temperature with stove and come out of the stove; The material that calcination is good will be crushed to below the 100 μ m, the percentage by weight that will prepare in advance is that 0.5～1% poly-vinyl alcohol solution mixes with broken back powder to rub and evenly makes the dough shape and put into the drying baker drying again, baking temperature is 100～120 ℃, take out after dry 8～16 hours, dried feed is through broken and to sieve-150 μ m～+ 50 μ m be accept once more, again accept is adopted high-temperature flame treatment at 1500～1950 ℃, under high temperature fused state, because surface tension effects, make the powder particle form spheric grain in moment, again through screening, close and criticize, the spheric grain of getting-120 μ m～+ 54 μ m is through coating, ferrite ball type carrier has promptly been made in oven dry.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 94110165 CN1109602A (en) | 1994-03-30 | 1994-03-30 | Ferrite ball type carrier for duplicator and its producing technology |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 94110165 CN1109602A (en) | 1994-03-30 | 1994-03-30 | Ferrite ball type carrier for duplicator and its producing technology |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN1109602A true CN1109602A (en) | 1995-10-04 |
Family
ID=5034153
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 94110165 Pending CN1109602A (en) | 1994-03-30 | 1994-03-30 | Ferrite ball type carrier for duplicator and its producing technology |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102093043A (en) * | 2010-12-24 | 2011-06-15 | 嘉兴龙晴照明科技有限公司 | Nickel-zinc ferrite material for high-frequency electrodeless lamp power couplers and preparation method thereof |
| CN102167572A (en) * | 2010-12-24 | 2011-08-31 | 嘉兴龙晴照明科技有限公司 | Nickel zinc ferrite material with initial permeability of 10+/-20 percent and preparation method thereof |
| CN104193314A (en) * | 2014-08-14 | 2014-12-10 | 蕲春县蕊源电子有限公司 | High-permeability soft magnetic ferrite material and preparation method thereof |
| CN106753280A (en) * | 2016-12-30 | 2017-05-31 | 天津泽希矿产加工有限公司 | A kind of spherical alumina iron and spherical alumina iron are the VHD drilling fluid of heavy weight additive |
| CN109923954A (en) * | 2016-10-31 | 2019-06-21 | 3M创新有限公司 | The horizontal compound of high load for electromagnetic interference (EMI) application |
-
1994
- 1994-03-30 CN CN 94110165 patent/CN1109602A/en active Pending
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102093043A (en) * | 2010-12-24 | 2011-06-15 | 嘉兴龙晴照明科技有限公司 | Nickel-zinc ferrite material for high-frequency electrodeless lamp power couplers and preparation method thereof |
| CN102167572A (en) * | 2010-12-24 | 2011-08-31 | 嘉兴龙晴照明科技有限公司 | Nickel zinc ferrite material with initial permeability of 10+/-20 percent and preparation method thereof |
| CN104193314A (en) * | 2014-08-14 | 2014-12-10 | 蕲春县蕊源电子有限公司 | High-permeability soft magnetic ferrite material and preparation method thereof |
| CN109923954A (en) * | 2016-10-31 | 2019-06-21 | 3M创新有限公司 | The horizontal compound of high load for electromagnetic interference (EMI) application |
| CN106753280A (en) * | 2016-12-30 | 2017-05-31 | 天津泽希矿产加工有限公司 | A kind of spherical alumina iron and spherical alumina iron are the VHD drilling fluid of heavy weight additive |
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| C01 | Deemed withdrawal of patent application (patent law 1993) | ||
| WD01 | Invention patent application deemed withdrawn after publication |