CN100509178C - Chromate-free continuous fluidized-bed tabe-material coating - Google Patents
Chromate-free continuous fluidized-bed tabe-material coating Download PDFInfo
- Publication number
- CN100509178C CN100509178C CNB031328474A CN03132847A CN100509178C CN 100509178 C CN100509178 C CN 100509178C CN B031328474 A CNB031328474 A CN B031328474A CN 03132847 A CN03132847 A CN 03132847A CN 100509178 C CN100509178 C CN 100509178C
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- Prior art keywords
- coating
- tubing
- induction coil
- utilize
- frequency induction
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- Expired - Fee Related
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-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05D—PROCESSES FOR APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05D7/00—Processes, other than flocking, specially adapted for applying liquids or other fluent materials to particular surfaces or for applying particular liquids or other fluent materials
- B05D7/50—Multilayers
- B05D7/52—Two layers
- B05D7/54—No clear coat specified
- B05D7/546—No clear coat specified each layer being cured, at least partially, separately
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05D—PROCESSES FOR APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05D1/00—Processes for applying liquids or other fluent materials
- B05D1/18—Processes for applying liquids or other fluent materials performed by dipping
- B05D1/22—Processes for applying liquids or other fluent materials performed by dipping using fluidised-bed technique
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05D—PROCESSES FOR APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05D1/00—Processes for applying liquids or other fluent materials
- B05D1/18—Processes for applying liquids or other fluent materials performed by dipping
- B05D1/22—Processes for applying liquids or other fluent materials performed by dipping using fluidised-bed technique
- B05D1/24—Applying particulate materials
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05D—PROCESSES FOR APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05D7/00—Processes, other than flocking, specially adapted for applying liquids or other fluent materials to particular surfaces or for applying particular liquids or other fluent materials
- B05D7/14—Processes, other than flocking, specially adapted for applying liquids or other fluent materials to particular surfaces or for applying particular liquids or other fluent materials to metal, e.g. car bodies
- B05D7/146—Processes, other than flocking, specially adapted for applying liquids or other fluent materials to particular surfaces or for applying particular liquids or other fluent materials to metal, e.g. car bodies to metallic pipes or tubes
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05D—PROCESSES FOR APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05D2254/00—Tubes
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05D—PROCESSES FOR APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05D3/00—Pretreatment of surfaces to which liquids or other fluent materials are to be applied; After-treatment of applied coatings, e.g. intermediate treating of an applied coating preparatory to subsequent applications of liquids or other fluent materials
- B05D3/02—Pretreatment of surfaces to which liquids or other fluent materials are to be applied; After-treatment of applied coatings, e.g. intermediate treating of an applied coating preparatory to subsequent applications of liquids or other fluent materials by baking
- B05D3/0218—Pretreatment, e.g. heating the substrate
- B05D3/0245—Pretreatment, e.g. heating the substrate with induction heating
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05D—PROCESSES FOR APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05D3/00—Pretreatment of surfaces to which liquids or other fluent materials are to be applied; After-treatment of applied coatings, e.g. intermediate treating of an applied coating preparatory to subsequent applications of liquids or other fluent materials
- B05D3/02—Pretreatment of surfaces to which liquids or other fluent materials are to be applied; After-treatment of applied coatings, e.g. intermediate treating of an applied coating preparatory to subsequent applications of liquids or other fluent materials by baking
- B05D3/0254—After-treatment
- B05D3/0281—After-treatment with induction heating
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05D—PROCESSES FOR APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05D3/00—Pretreatment of surfaces to which liquids or other fluent materials are to be applied; After-treatment of applied coatings, e.g. intermediate treating of an applied coating preparatory to subsequent applications of liquids or other fluent materials
- B05D3/04—Pretreatment of surfaces to which liquids or other fluent materials are to be applied; After-treatment of applied coatings, e.g. intermediate treating of an applied coating preparatory to subsequent applications of liquids or other fluent materials by exposure to gases
- B05D3/0406—Pretreatment of surfaces to which liquids or other fluent materials are to be applied; After-treatment of applied coatings, e.g. intermediate treating of an applied coating preparatory to subsequent applications of liquids or other fluent materials by exposure to gases the gas being air
- B05D3/0426—Cooling with air
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- Life Sciences & Earth Sciences (AREA)
- Engineering & Computer Science (AREA)
- Wood Science & Technology (AREA)
- Application Of Or Painting With Fluid Materials (AREA)
- Chemical Treatment Of Metals (AREA)
- General Induction Heating (AREA)
Abstract
A process for coating pipes comprises vortex sintering using a powdery, meltable polymer as the coating material. The pipe is first cleaned. A primer is then applied and burnt in using a middle frequency induction spool. Vaporized solvent is removed using a radial ventilation unit, and the pipe is pre-heated using an induction spool. A process for coating pipes comprises vortex sintering using a powdery, meltable polymer as the coating material. The pipe is first cleaned. A primer is then applied and burnt in using a middle frequency induction spool. Vaporized solvent is removed using a radial ventilation unit, and the pipe is pre-heated using an induction spool. Powder is prevented from clumping together by air shower members and guide plates. A further induction spool smooths out incompletely melted areas, and an air shower is used to pre-cool the pipe surface. Final cooling takes place in a water bath.
Description
Technical field and background technology
Auto industry is continued to use chromium (VI) compound (chromate) so far with coated pipe always and is produced. and adopt chromate in order that in the extrusion method that is adopted so far, reach extraordinary adhesion property. for this reason, the tubing that adopts chromate to handle, aluminum pipe also carries out chromate to be handled, steel pipe then at first carries out aluminium to be handled, yet and then carry out chromate and handle., from 2003. auto industry is about to require Chrome-free tubing.
Summary of the invention
The purpose of this invention is to provide a kind of can realize continuous Chrome-free new method. the known multiple continuous coating process that tubing is arranged. for example, magazine " plastics " volume 57, the 1st phase, a kind of method is described in pp.21～24, it adopts fluid bed to be coated with to tubing and is coated with PVC, Gu but the information that provides in the literary composition does not relate to well attached performance and homogeneous layer thickness distribution. this, the document does not provide and meets the means that auto industry essence requires.
The various shortcoming of prior art, particularly adhesion property and layer thickness distribution aspect also are present in shallow layer (120～150 μ m) neck city, and they also all can adopt method claimed in claims of the present invention to be overcome.
This is that the means of fluid bed coating as the outer coating of pipe are preferably operated and adopted to pillow automatically and continuously. it is by forming with the lower part:
1) the Clean-pretreatment system of tubing, the tubing of great majority supply all has grease;
2) priming paint-tackifier storage batea is used for providing tackifier between steel surface and polymeric layer (paint finishing or dip-coating system);
3) the Medium frequency induction coil 1, be used to toast priming paint and, contain solvent priming paint, evaporating solvent if adopt:
4) radial fan is used to the dissipation of the solvent accelerating to evaporate;
5) the Medium frequency induction coil 2, are used for preheating tubing;
6) fluid bed coating storage batea, have integrated Medium frequency induction coil 3, being used to apply coating. the loss factor of coating is too low, so that it is not easy heating, and the steel pipe of preheating is heated to the temperature of requirement rapidly by this system the time. and the solid element of decision of bed thickness is preheat temperature and inundates the time during the coating of control fluid bed. and wearing at tubing is under the situation of resting the head on, this means that what bed thickness can be by generator power and tubing sprouts into that speed changes. these two factors can be controlled independently of one another from console;
7) internals in the fluid bed coating storage batea, it is made up of the metal deflector that the tubing top is used to eliminate the hole that is used to eliminate the powder fault of tubing bottom side below air blowing system that powder gathers and the tubing and is caused.The bed thickness of homogeneous comprises radial and axially, has only by adopting this kind special internal member to guarantee;
8) the Medium frequency induction coil 4, and being used to make not fully, the coating of fusion polishes;
9) melt zone, for thoroughly being melted in the coating deposit of tubing from adhering to after intermediate frequency induction coil 4 comes out, and required for producing smooth melt.Pass during this system, this layer still is heat and soft, therefore damages easily.So in this stage, tubing does not allow to be placed on the deflector roll to send;
10) be used for tentatively cooling off the air blowing system of tube surfaces.So the tube surfaces temperature is controlled in the fusing point that is lower than coating;
11) water base cooling system.Tubing enters in the tank, is subjected to further cooling and sclerosis at layer described in the tank, moves so just might relay on deflector roll this moment.
Decide on desired bed thickness, the induction coil under 5,6 and 8 can be operated under various various combinations, and has the power of variation.Here spendable induction coil is:
5 and 8,
5 and 6,
5,6 and 8,
6，
6 and 8.
In all cases, tubing is all used Frequency Induction Heating.About the application rate and the powder consumption of electric energy requirement, this type system were once reported approximate formula.Adopt the inventive method, might be coupled at and become continuous pipe together having any pipeline section that requires length, and their along continuous straight runs by in the process of this method with their outside of polymer powder coating.Suitable coating is can fluidised melting polymer and their mixture.Polyamide powder is suitable especially, especially based on those of nylon-11 and PA-12.Produce especially the powder of good processing effect here and be according to DE 29 06 647 (
Company) Zhi Bei those, its trade mark are called VESTOSINT (Degussa company), because this kind product has round especially grain shape, because they are to adopt precipitation method preparation.The tackifier of available commercial are the paint tube surfaces at first.Here suitable priming paint is any familiar polymer grade, especially those of polyamide.They can solution, suspended substance or apply with powder type.The tackifier that are particularly suitable for VESTOSINT are special for being fit to that VESTOSINT makes those.If adopt solids content be about 8% contain the solvent tackifier, then gas is done the bed thickness of back priming paint between 5～8 μ m.The inventive method can reach the homogeneous bed thickness of 50～1000 mu m ranges.Preferred bed thickness is between 50～300 μ m, and the inventive method can reach ± 30% tolerance.The tackifier of available commercial (for example, VESTOSINT tackifier WS5) are the paint tube surfaces at first.Gas is done the bed thickness typical case of back priming paint between 5～8 μ m.Contain the solvent tackifier if adopt, then its solids content is generally about 8%.
The tubing that the inventive method is produced is particularly suitable as the hydraulic pressure adapter and brake is taken over, and for example, is used for auto industry.
The specific embodiment
Below the inventive method will be described in more detail.
By the Medium frequency induction preheating
Why select Frequency Induction Heating be because, in the time of in being applied in continuous process, it is simultaneously very fast again that these heating means are easy to control, and bring another advantage, promptly, the induction coil of heating tubing can directly be arranged in the fluidised powder in tubing passes the process of system, does not consequently have heat loss.10,000Hz and tube wall thickness are under the situation of 2mm, 300 ℃ of needs 1s of heating temperature rise.When frequency is low, bigger penetration depth will make heating process faster, at 2000Hz and under the identical situation of other conditions, only there is 0.73s this time.Induction coil is taked solenoidal form, and utilizes water flowing to cool off.It all is cold as powder all the time.Generator system is made up of the machine generator, the switch board that has console, capacitor accumulator and the induction coil that produce high frequency.This system can regard a transformer simply as, and high-frequency electrical energy is fed into its elementary side, constitutes its secondary work package simultaneously and then only is made of the winding of a circle.The very high current density that produces in the secondary loop causes Fast Heating.The work package of passing system must have the section of homogeneous and the wall thickness of homogeneous, and for example rotational symmetric goods are as wire, tubing, bar and so on.
Energy consumes and application rate
The through-rate of tubing (advanced speed) depends on pipe diameter and wall thickness, that is, the weight of unit length tubing also depends on generator power.Nature, principal element also has the degree of heat of frequency generator and tubing requirement.Yet, since these variablees of back can be considered constant at the beginning or change is little at least, so can suppose suitable mean values.The generator power that requires is:
Wherein N is a generator power, and unit is kW, and G is the tubing weight of passing system, and units/h, cp are the specific heat (～0.12kca l/kg ℃) of steel, and Δ t is the tubing temperature rise of requirement, and η is the gross efficiency (between about 0.6～0.75) of generator system.Coefficient 860 is to derive from from the conversion of 1kW=860kca l/h.If equation (1) approximates 240 ℃ situation with regard to η=0.7 and Δ t and finds the solution G, the result be one about very useful empirical equation with the maximum of the heatable steel of a certain specific generator power, be unit (condition of the present invention and conditions of similarity are set up) with kg/h:
G≈20N (2)
So, adopting the 36kW medium-frequency generator, about 720kg/h steel pipe can be heated 240 ℃ of temperature rises.This calculated value is confirmed in an embodiment.
As quick approximate evaluation, the approximate guiding numerical value of the power that requires (under conditioned disjunction conditions of similarity of the present invention) is:
These empirical equations, nature are also incorrect on dimension, because its numerical value is the quantity (for example, specific heat Cp) that is used to have dimension.Yet incorrect equation has proved and can satisfy the operation requirement well on these dimensions.If formula that is used for the tubing weight by system and the formula that is used for desired generator power are combined, consequently one about the density y=7.85kg/dm under the given generator power
3The simple relation of maximum through-rate of steel pipe.If for example, the tubing coating system usually needs to be coated with the tubing of various different-diameters and wall thickness, then following formula can provide the guiding numerical value of maximum through-rate rapidly.For other conditions, this numeric factors must be made certain modification:
Here, must insert transmission rates V
Max, the m/min of unit, generator power N, the kW of unit, tube outer diameter d
e, mm and tube wall thickness s, unit also is mm.
Embodiment:
Tubing coating system (figure 01) is by forming with the lower part:
1) the Clean-pretreatment system of tubing, the tubing of great majority supply all has grease;
2) priming paint-tackifier storage batea is used for providing tackifier between steel surface and polymeric layer (paint finishing or dip-coating system);
3) the Medium frequency induction coil 1, is used to toast priming paint and is used for evaporating solvent;
4) radial fan is used to the dissipation of the solvent accelerating to evaporate;
5) the Medium frequency induction coil 2, are used for preheating tubing;
6) fluid bed coating storage batea has integrated Medium frequency induction coil 3, is used to apply PA-12.The loss factor of PA powder is too low, so that it is not easy to be heated, and the steel pipe of preheating is heated to the temperature of requirement rapidly by this system the time.The decisive factor of bed thickness is preheat temperature and Immersion time during the coating of control fluid bed.Wear system and under the situation excessively, this means that bed thickness can change by the pace of generator power and tubing at tubing.These two factors can be controlled independently of one another from console;
7) internals in the fluid bed coating storage batea, it is made of the metal deflector that the tubing top is used to eliminate the hole that is used to eliminate the powder fault of tubing bottom side below air blowing system that powder gathers and the tubing and is caused.The bed thickness of homogeneous, comprise radial and axial, can be only by adopting this kind special internal member to guarantee;
8) the Medium frequency induction coil 4, and being used to make not fully, the coating of fusion polishes;
9) melt zone, for thoroughly being melted in the coating deposit of tubing from adhering to after intermediate frequency induction coil 4 comes out, and required for producing smooth melt.Pass during this system, this layer still is heat and soft, therefore damages easily.So in this stage, tubing does not allow to be placed on the deflector roll to send;
10) be used for tentatively cooling off the air blowing system of tube surfaces.So the tube surfaces temperature is controlled in the fusing point that is lower than coating;
11) water base cooling system.Tubing enters in the tank, is subjected to further cooling and sclerosis at the tank floating coat, moves so just might relay on deflector roll this moment.
A series of result of experiment of carrying out in described system are stated from table 1.Example 1～7 all adopts VESTOSINT 2157 precipitation method PA-12 powder, and Degussa company provides.In all examples that provide, do not carry out the chromate preliminary treatment here.
Scribble the test of the tubing of priming paint
A) TL 222 anti-corrosion protection coatings (surface protection requirement) the D Zn/PA of brake pipe
Corrosion-resistant: test period 500h, cut is according to DIN 53 167;
Cut creep≤2mm
Corrosion-resistant: test period 500h, according to the rock impact test of PV1213; Lower metal does not corrode
Corrosion-resistant: test period 1000h; The corrosion of no zinc, no lower metal corrodes, and does not have the PA layer and peel off
Chemically-resistant: press TL222, project 5; No polymeric layer bubble or softening the generation,
Gas is done after 24 hours and subsequently around the mandrel coiling (360 °) of size 16mm, is not had visible PA coating be full of cracks or peel off generation
B) in water, store the adhesion test of back, adopt the point of a knife test the tubing that scribbles priming paint:
The tubing no marking
The dry state test is coated with after 1 day: adhere to very goodly
The dry state test was coated with after 1 day, to coil pipe (around the 16mm mandrel);
Adhere to very goodly
In water, stored 3, take out the back straightway testing, adhere to very goodly
Tubing has cut
The dry state test is coated with after 1 day: adhere to very good
In water, stored 3, take out the back straightway testing, adhere to very goodly
Description of drawings
1 cleaning systems
2 drive 1
3 priming paint unit
4 inductions, 1 (coil I-priming paint drying)
5 inductions, 2 (coil V-priming paint dryings)
6 radial fan 1
7 radial fan 2
8 drive 2
9 inductions, 3 (preheatings)
10 are put in deflector roll 1
11 fluid bed sinter dishes comprise induction 4
12 inductions (level and smooth (
))
13 tubing
14 purge nozzles
15 are put in deflector roll 2
16 water-baths
17 are put in deflector roll 3
18 are put in deflector roll 4
19 drive 4
20 drive 5 (take-away belt (conveyor) is pulled out (draw-off))
21 take off
Claims (11)
1. one kind is adopted the method for the chromate-free tubing coating of fluid bed coating with Powdered melting polymer as coating, and it comprises:
1) in pretreatment system, clean tubing,
2) on tubing, apply priming paint,
3) utilize Medium frequency induction coil baking priming paint and, contain solvent priming paint if adopt, evaporate this solvent,
4) utilize radial fan to accelerate the dissipation of the solvent evaporate,
5) utilize Medium frequency induction coil preheating tubing,
6) adopt, if desired, the fluid bed coating storage batea that has integrated Medium frequency induction coil applies coating,
7) use internals in the fluid bed coating storage batea, described internals comprises the metal deflector that the tubing top is used to eliminate the air blowing system that powder gathers and comprises the hole that is used to eliminate the powder fault of tubing bottom side below the tubing and is caused,
8) utilize the Medium frequency induction coil that the coating of incomplete fusion is polished if desired,
9) at melt zone, the coating deposit that thorough fusion adheres to also produces smooth melt,
10) utilize the air blowing system tentatively to cool off tube surfaces,
11) utilize water cooling further cooling and hardening coat.
2. the method for claim 1,
It is characterized in that,
The usage of the induction coil under the project 6 and 8 is as follows, decides on the bed thickness of coating:
Adopt induction coil 8,
Or employing induction coil 6,
Or employing induction coil 6 and 8.
3. one kind is adopted the method for the chromate-free tubing coating of fluid bed coating with Powdered melting polymer as coating, and it comprises:
1) in pretreatment system, clean tubing,
2) on tubing, apply priming paint,
3) utilize Medium frequency induction coil baking priming paint and, contain solvent priming paint if adopt, evaporate this solvent,
4) utilize radial fan to accelerate the dissipation of the solvent evaporate,
5) utilize Medium frequency induction coil preheating tubing if desired,
6) adopt the fluid bed coating storage batea that has integrated Medium frequency induction coil to apply coating,
7) use internals in the fluid bed coating storage batea, described internals comprises the metal deflector that the tubing top is used to eliminate the air blowing system that powder gathers and comprises the hole that is used to eliminate the powder fault of tubing bottom side below the tubing and is caused,
8) utilize the Medium frequency induction coil that the coating of incomplete fusion is polished if desired,
9) at melt zone, the coating deposit that thorough fusion adheres to also produces smooth melt,
10) utilize the air blowing system tentatively to cool off tube surfaces,
11) utilize water cooling further cooling and hardening coat.
4. the method for claim 3,
It is characterized in that,
The usage of the induction coil under the project 5 and 8 is as follows, decides on the bed thickness of coating:
Adopt induction coil 5 and 8,
Or employing induction coil 8,
Or employing induction coil 5.
5. the method for any one in the claim 1 to 4,
It is characterized in that,
Polyamide is used as coating.
6. the method for any one in the claim 1 to 4,
It is characterized in that
Adopt nylon-11 or PA-12 as coating.
7. the method for any one in the claim 1 to 4,
It is characterized in that,
The PA-12 that adopts the powder type that precipitates is as coating.
8. the method for any one in the claim 1 to 4,
It is characterized in that,
Wherein apply the tackifier of available commercial with suspended substance, solution or powder type.
9. the method for any one in the claim 1 to 4,
It is characterized in that,
The thickness of polymeric layer amounts to 50～1000 μ m and its average deviation is no more than 30%.
10. the method for any one in the claim 1 to 4,
It is characterized in that,
The thickness of polymeric layer amounts to 50～300 μ m and its average deviation is no more than 30%.
11. the method for any one in the claim 1 to 4,
It is characterized in that,
The thickness of polymeric layer amounts to 50～300 μ m and its average deviation is no more than 20%.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE10233345A DE10233345A1 (en) | 2002-07-23 | 2002-07-23 | Continuous chromate-free pipe coatings by fluidized bed sintering |
| DE10233345.9 | 2002-07-23 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1488447A CN1488447A (en) | 2004-04-14 |
| CN100509178C true CN100509178C (en) | 2009-07-08 |
Family
ID=29796511
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNB031328474A Expired - Fee Related CN100509178C (en) | 2002-07-23 | 2003-07-22 | Chromate-free continuous fluidized-bed tabe-material coating |
Country Status (10)
| Country | Link |
|---|---|
| EP (1) | EP1384523B1 (en) |
| JP (1) | JP4360856B2 (en) |
| KR (1) | KR20040010311A (en) |
| CN (1) | CN100509178C (en) |
| AT (1) | ATE302069T1 (en) |
| BR (1) | BR0302592A (en) |
| CA (1) | CA2435690A1 (en) |
| DE (2) | DE10233345A1 (en) |
| ES (1) | ES2246443T3 (en) |
| MX (1) | MXPA03006198A (en) |
Families Citing this family (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE102009015533B9 (en) | 2009-04-02 | 2011-01-13 | Babcock Borsig Service Gmbh | Method and apparatus for coating metallic pipes or other long components of limited cross section |
| DE102012101651A1 (en) * | 2012-02-29 | 2013-08-29 | Thyssenkrupp Rothe Erde Gmbh | Method for producing a roller bearing cage for an axial-radial roller bearing and axial-radial roller bearing |
| DE102012101649A1 (en) * | 2012-02-29 | 2013-08-29 | Thyssenkrupp Rothe Erde Gmbh | Method for producing a roller bearing cage, in particular for slewing bearings, and device for carrying out the method |
| IT201700047436A1 (en) * | 2017-05-03 | 2018-11-03 | Ima Spa | Method for coating bulk material |
| CN110076059B (en) * | 2019-03-18 | 2021-11-05 | 北京丰隆汇技术有限公司 | Snap spring hanging point powder supplementing method |
| CN112893061B (en) * | 2021-01-18 | 2022-02-25 | 南京和涛塑胶有限公司 | Production process of N-HAP hot-dip plastic steel pipe |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1288125C (en) * | 2003-01-16 | 2006-12-06 | 张小燕 | Method of preparing calcium propionate using egg shell |
Family Cites Families (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3108022A (en) * | 1960-05-09 | 1963-10-22 | Polymer Processes Inc | Apparatus for coating an elongate body with fluidized coating material |
| BE661657A (en) * | 1964-03-25 |
-
2002
- 2002-07-23 DE DE10233345A patent/DE10233345A1/en not_active Withdrawn
-
2003
- 2003-06-07 AT AT03012962T patent/ATE302069T1/en not_active IP Right Cessation
- 2003-06-07 DE DE50300986T patent/DE50300986D1/en not_active Expired - Lifetime
- 2003-06-07 EP EP03012962A patent/EP1384523B1/en not_active Expired - Lifetime
- 2003-06-07 ES ES03012962T patent/ES2246443T3/en not_active Expired - Lifetime
- 2003-07-10 MX MXPA03006198A patent/MXPA03006198A/en not_active Application Discontinuation
- 2003-07-21 BR BR0302592-6A patent/BR0302592A/en not_active IP Right Cessation
- 2003-07-21 CA CA002435690A patent/CA2435690A1/en not_active Abandoned
- 2003-07-22 CN CNB031328474A patent/CN100509178C/en not_active Expired - Fee Related
- 2003-07-22 KR KR1020030050140A patent/KR20040010311A/en not_active Application Discontinuation
- 2003-07-23 JP JP2003200680A patent/JP4360856B2/en not_active Expired - Fee Related
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1288125C (en) * | 2003-01-16 | 2006-12-06 | 张小燕 | Method of preparing calcium propionate using egg shell |
Also Published As
| Publication number | Publication date |
|---|---|
| ATE302069T1 (en) | 2005-09-15 |
| CA2435690A1 (en) | 2004-01-23 |
| ES2246443T3 (en) | 2006-02-16 |
| EP1384523A1 (en) | 2004-01-28 |
| DE50300986D1 (en) | 2005-09-22 |
| JP2004105949A (en) | 2004-04-08 |
| KR20040010311A (en) | 2004-01-31 |
| EP1384523B1 (en) | 2005-08-17 |
| CN1488447A (en) | 2004-04-14 |
| JP4360856B2 (en) | 2009-11-11 |
| DE10233345A1 (en) | 2004-02-12 |
| MXPA03006198A (en) | 2004-12-03 |
| BR0302592A (en) | 2004-08-24 |
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