CA2345922A1 - Method for coating a surface with a separating agent - Google Patents
Method for coating a surface with a separating agent Download PDFInfo
- Publication number
- CA2345922A1 CA2345922A1 CA002345922A CA2345922A CA2345922A1 CA 2345922 A1 CA2345922 A1 CA 2345922A1 CA 002345922 A CA002345922 A CA 002345922A CA 2345922 A CA2345922 A CA 2345922A CA 2345922 A1 CA2345922 A1 CA 2345922A1
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- CA
- Canada
- Prior art keywords
- powder
- coating
- less
- extrusion
- bar
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Abandoned
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Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22C—FOUNDRY MOULDING
- B22C3/00—Selection of compositions for coating the surfaces of moulds, cores, or patterns
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Paints Or Removers (AREA)
- Application Of Or Painting With Fluid Materials (AREA)
- Extrusion Of Metal (AREA)
Abstract
The invention relates to a method for coating a surface with a separating agent, characterised in that a BN powder is applied to the surface by means of electrostatic coating.
Description
Process for coating a surface arith a parting agent The invention relates to processes for coating a surface with a parting agent.
The problems which arise when shaping nonferrous metals are explained in the following text on the basis of the example of shaping aluminum. The processing of aluminum blocks to give the profiles takes place at typical processing temperatures of approximately 450°C, by means of extrusion. In this process, a preheated aluminum block (A1 block), which is preferably round in cross section, via a container, is pressed through the shaping extrusion dye by means of an extrusion ram, with the result that it is shaped into a profile, and is then cooled after i_t leaves the dye. The front part of the extrusion ram, which is also known as the extrusion plate, must fulfill the following tasks:
1. It must seal the container in t:he opposite direction to the direction of extrusion;
The problems which arise when shaping nonferrous metals are explained in the following text on the basis of the example of shaping aluminum. The processing of aluminum blocks to give the profiles takes place at typical processing temperatures of approximately 450°C, by means of extrusion. In this process, a preheated aluminum block (A1 block), which is preferably round in cross section, via a container, is pressed through the shaping extrusion dye by means of an extrusion ram, with the result that it is shaped into a profile, and is then cooled after i_t leaves the dye. The front part of the extrusion ram, which is also known as the extrusion plate, must fulfill the following tasks:
1. It must seal the container in t:he opposite direction to the direction of extrusion;
2. When the extrusion ram is withdrawn, it must be easy to part from the aluminum.
The remaining A1 extrusion discard is removed with a shearing blade (extrusion discard cutter) before the next Al block moves in for processing.
Owing to the extremely high level of corrosion exhibited by conventional metallic materials with respect to aluminum and other nonferrous metals at typical processing temperatures, contact points between nonferrous metal and the mold must be treated with so-called parting agents, so that uninterrupted operation is possible.
Soot is used as a conventional parting agent for separating extrusion plate and A1 block; the soot is deposited on an endface of the A1 block by burring an acetylene flame. This operation has to be repeated for each new Al block.
To coat the extrusion discard cutter, it is customary to use oils which evaporate on coming into contact with the hot A1, thus producing a parting effect.
Parting agents are used not only for extrusion but also for all processes used for shapin g nonferrous metals, such as for example gravity dye casting, low-pressure dye casting, pressure dye casting, continuous casting.
Generally, pigment-free formations are used, based on water or mineral oils with additives . In some cases, pigment-containing formations of parting agents are also used (cf. for example, EP (310046) . The pigments used comprise a whole series of solids, such as for example graphite, MoS2, BN or talc.
If the abovementioned in-situ formation of soot ,_5 is disregarded as a special case, a common factor of all parting agents known to date are that they have to be used in the form of liquid suspensions or emulsions.
They are usually applied by being sprayed onto the warm to very hot surfaces. At high temperatures, there is a risk of readily volatile components or any solvents igniting or of the active compound being lost when it suddenly evaporates or. coming into contact with the hot surface. Furthermore, the evaporation products represent a considerable burden on the .ambient air, which is increased further by the formation of decomposition products. Generally, a large proportion of the components pass into the water circuit which is installed in the area of the plants, and have to be eliminated at considerable cost at this point.
Therefore, the object of the invention is to provide a process for coating a surface with a parting agent which is not subject to the abovementioned problems of the prior art. The coating is to be carried ou~ uniformly, rapidly and at low cost.
The object is achieved by means c>f a process wherein a BN powder is applied to the surface by means of electrostatic coating.
The surface to be coated may, for example, be the surface of the shaping extrusion dye, e.g. of the extrusion plate or the extrusion discard cutter. In principle, however, it is also possible for the surface of the nonferrous metal which comes into contact with the extrusion ram to be treated in this way. Since the parting coating applied by means of the process according to the invention has good surface adhesion, it is preferable for those surfaces of the shaping extrusion dye which come into contact with the nonferrous metal to be treated, since this treatment i0 has to be repeated after three extrusion cycles at the earliest.
It has been found that not all BN powders are equally suitable for coating purposes. Some powders lead, inter alia, to a high level of consumption, irregular coating of the surface, and blockage of the nozzle of the application device.
Irregular coating may lead to uncontrolled bonding or adhesion of the nonferrous metal to the contact point between the nonferrous metal and the metallic material.
It is preferable to use BN powders with a fineness which corresponds to a specific surface area of 10-50 m'/g. Particularly preferably, the BN powders have a specific surface area of 10--30 m2/g, in particular a specific surface area of 10-20 m2/g.
The powder furthermore preferably contains less than 50, particularly preferably less than 0.50, of boric acid and boron oxides, indicated as B203. The level of the various boric acids, such as for example metaboric acid or orthoboric acid and of boron oxides is, as is customary in the prior art., indicated according to their analysis as B203 content.
Preferably, the moisture content of the powder, indicated as H20 content, is less than 1%, particularly preferably less than 0.20.
Particular preference is given to powders with a bulk density of less than 0.5 g/cm3, in particular less than 0.3 g/cm3.
The remaining A1 extrusion discard is removed with a shearing blade (extrusion discard cutter) before the next Al block moves in for processing.
Owing to the extremely high level of corrosion exhibited by conventional metallic materials with respect to aluminum and other nonferrous metals at typical processing temperatures, contact points between nonferrous metal and the mold must be treated with so-called parting agents, so that uninterrupted operation is possible.
Soot is used as a conventional parting agent for separating extrusion plate and A1 block; the soot is deposited on an endface of the A1 block by burring an acetylene flame. This operation has to be repeated for each new Al block.
To coat the extrusion discard cutter, it is customary to use oils which evaporate on coming into contact with the hot A1, thus producing a parting effect.
Parting agents are used not only for extrusion but also for all processes used for shapin g nonferrous metals, such as for example gravity dye casting, low-pressure dye casting, pressure dye casting, continuous casting.
Generally, pigment-free formations are used, based on water or mineral oils with additives . In some cases, pigment-containing formations of parting agents are also used (cf. for example, EP (310046) . The pigments used comprise a whole series of solids, such as for example graphite, MoS2, BN or talc.
If the abovementioned in-situ formation of soot ,_5 is disregarded as a special case, a common factor of all parting agents known to date are that they have to be used in the form of liquid suspensions or emulsions.
They are usually applied by being sprayed onto the warm to very hot surfaces. At high temperatures, there is a risk of readily volatile components or any solvents igniting or of the active compound being lost when it suddenly evaporates or. coming into contact with the hot surface. Furthermore, the evaporation products represent a considerable burden on the .ambient air, which is increased further by the formation of decomposition products. Generally, a large proportion of the components pass into the water circuit which is installed in the area of the plants, and have to be eliminated at considerable cost at this point.
Therefore, the object of the invention is to provide a process for coating a surface with a parting agent which is not subject to the abovementioned problems of the prior art. The coating is to be carried ou~ uniformly, rapidly and at low cost.
The object is achieved by means c>f a process wherein a BN powder is applied to the surface by means of electrostatic coating.
The surface to be coated may, for example, be the surface of the shaping extrusion dye, e.g. of the extrusion plate or the extrusion discard cutter. In principle, however, it is also possible for the surface of the nonferrous metal which comes into contact with the extrusion ram to be treated in this way. Since the parting coating applied by means of the process according to the invention has good surface adhesion, it is preferable for those surfaces of the shaping extrusion dye which come into contact with the nonferrous metal to be treated, since this treatment i0 has to be repeated after three extrusion cycles at the earliest.
It has been found that not all BN powders are equally suitable for coating purposes. Some powders lead, inter alia, to a high level of consumption, irregular coating of the surface, and blockage of the nozzle of the application device.
Irregular coating may lead to uncontrolled bonding or adhesion of the nonferrous metal to the contact point between the nonferrous metal and the metallic material.
It is preferable to use BN powders with a fineness which corresponds to a specific surface area of 10-50 m'/g. Particularly preferably, the BN powders have a specific surface area of 10--30 m2/g, in particular a specific surface area of 10-20 m2/g.
The powder furthermore preferably contains less than 50, particularly preferably less than 0.50, of boric acid and boron oxides, indicated as B203. The level of the various boric acids, such as for example metaboric acid or orthoboric acid and of boron oxides is, as is customary in the prior art., indicated according to their analysis as B203 content.
Preferably, the moisture content of the powder, indicated as H20 content, is less than 1%, particularly preferably less than 0.20.
Particular preference is given to powders with a bulk density of less than 0.5 g/cm3, in particular less than 0.3 g/cm3.
Particular preference is given to BN powders which fulfill all the abovementioned parameters.
To carry out the process according to the invention, the BN powder is fluidized in a storage container by means of a fluidizing gas. The fluidizing gas is usually compressed air. Other inert gases, such as for example N2, noble gases or gas mixtures may also be used.
The fluidized BN powder is electrostatically charged. This is carried out, for example, as is customary for powder coatings, in a commercially available spray-coating device for powder coatings. A
voltage of 75-80 kV is preferably used to charge the BN
particles.
The fluidized BN powder is sprayed onto the surface in the charged state and coats the desired parts uniformly. This is carried out in a similar way to a conventional powder coating.
Preferably, the BN powder throughput is adjusted to levels which are suitable for the particular coating operation by means of the delivery-gas pressure and the nozzle geometry (primarily the nozzle diameter). The delivery air is therefore preferably used at 0.5-1.5 bar, the fluidizing air at 0.3-0.8 bar. The total volume of air is approximately 5-8 m3/h.
The operation may either be carried out manually, or else it is entirely possible for the process to be carried out fully automatically. The amount applied and the adhesion can be regulated by varying the voltage and the pressure.
Surprisingly, it has emerged that the BN
powders which are applied by means of the process according to the invention exhibit sufficiently high adhesion to the medium to be coated (e. g. an extrusion plate) without there being any need to add binders.
The invention therefore also relates to the use of BN powders as a parting agent when shaping nonferrous metals and to a parting agent consisting of BN powder. Preferably, these powders are the BN powders referred to as being preferred.
The coating carried out by means of the process according to the invention lasts longer than the conventional parting-agent coating. It allows the extrusion cycle to be repeated several times before a further application is required.
It has been found that the coating also succeeds at corners and edges and, furthermore, runs ,~0 around these areas.
The coating process according to the invention has proven to be extremely simple, quick and easy to carry out.
Powders which are suitable for use in the process according to the invention are commercially available with a wide range of properties.
A BN powder which is preferably suitable for use in the process according to the invention. may also be produced from commercially available hexagonal BN
powder.
If the level of boric acids and B203 in the conventi onal powders is too high, the B203 level in the powder is set to the desired value by washing, for example with water or alcohols.
Excessive moisture contents are reduced by means of drying, for example in conventional drying cabinets, under certain circumstances with protective gas or vacuum drying, in order to achieve the levels required for the powder according to the invention.
If necessary, the bulk density which is required according to the invention for the BN powder is set by grinding the BN powders, which may have been pretreated. In doing so, it must preferably be ensured that there is no excessive moisture uptake during grinding.
The grinding units used are a series of conventional "dry" methods, such as for example by means of pinned disc mills, rotary mills, ball mills, ~Il Var10ll5 fOrmS.
Tests have confirmed the ease of application of the BN powder and the excellent parting action of BN
with respect to A1. The use of the powders is not limited to A7_; the application according to the invention of BN powder by means of f~lectrostatic coating without any binders and free of other substances such as solvents is also suitable for processing a whole series of other nonferrous metals, such as for example Cu, Zn, Mg, Pb, Sn or alloys thereof.
The invention therefore also relates to the use of the process according to the invention for coating surfaces when extruding nonferrous metals.
The nonferrous metals are preferably Cu, Zn, Mg, Pb, Sn and alloys thereof.
The following examples serve to describe the invention further:
Example 1:
A BN powder which is com~-nercially available from Elektroschmelzwerk Kempten GmbH, Munich under the designation Sl, with a fineness which corresponds to a BET specific surface area of 19.5 m2/g, a B203 content of 0.120, a moisture of 0.250 H20 and a bulk density of 0.55 g/cm3 (powder I) was ground in a pinned disc mill with a throughput of 20 kg/h. The resultant powder (powder II) had a BET specific surface area of 14.5 mz/g, a B203 content of 0.2o, a moisture of 0.3%
and a bulk density of 0.2 g/cm3.
Powder II was applied to an extrusion plate with a diameter of 20 cm by means of electrostatic coating (Gema Company), (80 kV; 0.8 bar delivery air on inlet side, 0.4 bar fluidizing air, 5 m3/h air volume for delivery). The powder was instantaneously and uniformly deposited on the extrusion plate. Approx.
0.5 g of BN powder is consumed. The coating only had to be renewed after a further three extrusion cyc7_es.
Example 2:
A hexagonal BN powder with a fineness which corresponds to a speci fic surface area of 6 m2/g and a 8203 content of 90 (powder III) with a bu:Lk density at 0.6 g/cm3 was ground in ball mill untia specific surface area of 15 m2/g was reached. The resultant powder IV was dispersed and washed a number of times with water, until the B203 content had been reduced to 0.1%. Then, the powder was dried in vacuo at 60°C, to give a residual moisture of 0.2s, and was ground in a rotary mill in order to break up the agglomerates . The resultant powder V (bulk density 0.19 g/cm3, other parameters as mentioned) was used to electrostatically coat an A1 block, as described in Example 1. The consumption was the same as that in Example 1. The coating was uniform and allowed extrusion plates which came into contact with the layer to be used three times for shaping A1 before the coating had to be renewed.
To carry out the process according to the invention, the BN powder is fluidized in a storage container by means of a fluidizing gas. The fluidizing gas is usually compressed air. Other inert gases, such as for example N2, noble gases or gas mixtures may also be used.
The fluidized BN powder is electrostatically charged. This is carried out, for example, as is customary for powder coatings, in a commercially available spray-coating device for powder coatings. A
voltage of 75-80 kV is preferably used to charge the BN
particles.
The fluidized BN powder is sprayed onto the surface in the charged state and coats the desired parts uniformly. This is carried out in a similar way to a conventional powder coating.
Preferably, the BN powder throughput is adjusted to levels which are suitable for the particular coating operation by means of the delivery-gas pressure and the nozzle geometry (primarily the nozzle diameter). The delivery air is therefore preferably used at 0.5-1.5 bar, the fluidizing air at 0.3-0.8 bar. The total volume of air is approximately 5-8 m3/h.
The operation may either be carried out manually, or else it is entirely possible for the process to be carried out fully automatically. The amount applied and the adhesion can be regulated by varying the voltage and the pressure.
Surprisingly, it has emerged that the BN
powders which are applied by means of the process according to the invention exhibit sufficiently high adhesion to the medium to be coated (e. g. an extrusion plate) without there being any need to add binders.
The invention therefore also relates to the use of BN powders as a parting agent when shaping nonferrous metals and to a parting agent consisting of BN powder. Preferably, these powders are the BN powders referred to as being preferred.
The coating carried out by means of the process according to the invention lasts longer than the conventional parting-agent coating. It allows the extrusion cycle to be repeated several times before a further application is required.
It has been found that the coating also succeeds at corners and edges and, furthermore, runs ,~0 around these areas.
The coating process according to the invention has proven to be extremely simple, quick and easy to carry out.
Powders which are suitable for use in the process according to the invention are commercially available with a wide range of properties.
A BN powder which is preferably suitable for use in the process according to the invention. may also be produced from commercially available hexagonal BN
powder.
If the level of boric acids and B203 in the conventi onal powders is too high, the B203 level in the powder is set to the desired value by washing, for example with water or alcohols.
Excessive moisture contents are reduced by means of drying, for example in conventional drying cabinets, under certain circumstances with protective gas or vacuum drying, in order to achieve the levels required for the powder according to the invention.
If necessary, the bulk density which is required according to the invention for the BN powder is set by grinding the BN powders, which may have been pretreated. In doing so, it must preferably be ensured that there is no excessive moisture uptake during grinding.
The grinding units used are a series of conventional "dry" methods, such as for example by means of pinned disc mills, rotary mills, ball mills, ~Il Var10ll5 fOrmS.
Tests have confirmed the ease of application of the BN powder and the excellent parting action of BN
with respect to A1. The use of the powders is not limited to A7_; the application according to the invention of BN powder by means of f~lectrostatic coating without any binders and free of other substances such as solvents is also suitable for processing a whole series of other nonferrous metals, such as for example Cu, Zn, Mg, Pb, Sn or alloys thereof.
The invention therefore also relates to the use of the process according to the invention for coating surfaces when extruding nonferrous metals.
The nonferrous metals are preferably Cu, Zn, Mg, Pb, Sn and alloys thereof.
The following examples serve to describe the invention further:
Example 1:
A BN powder which is com~-nercially available from Elektroschmelzwerk Kempten GmbH, Munich under the designation Sl, with a fineness which corresponds to a BET specific surface area of 19.5 m2/g, a B203 content of 0.120, a moisture of 0.250 H20 and a bulk density of 0.55 g/cm3 (powder I) was ground in a pinned disc mill with a throughput of 20 kg/h. The resultant powder (powder II) had a BET specific surface area of 14.5 mz/g, a B203 content of 0.2o, a moisture of 0.3%
and a bulk density of 0.2 g/cm3.
Powder II was applied to an extrusion plate with a diameter of 20 cm by means of electrostatic coating (Gema Company), (80 kV; 0.8 bar delivery air on inlet side, 0.4 bar fluidizing air, 5 m3/h air volume for delivery). The powder was instantaneously and uniformly deposited on the extrusion plate. Approx.
0.5 g of BN powder is consumed. The coating only had to be renewed after a further three extrusion cyc7_es.
Example 2:
A hexagonal BN powder with a fineness which corresponds to a speci fic surface area of 6 m2/g and a 8203 content of 90 (powder III) with a bu:Lk density at 0.6 g/cm3 was ground in ball mill untia specific surface area of 15 m2/g was reached. The resultant powder IV was dispersed and washed a number of times with water, until the B203 content had been reduced to 0.1%. Then, the powder was dried in vacuo at 60°C, to give a residual moisture of 0.2s, and was ground in a rotary mill in order to break up the agglomerates . The resultant powder V (bulk density 0.19 g/cm3, other parameters as mentioned) was used to electrostatically coat an A1 block, as described in Example 1. The consumption was the same as that in Example 1. The coating was uniform and allowed extrusion plates which came into contact with the layer to be used three times for shaping A1 before the coating had to be renewed.
Claims (10)
1. A process for coating a surface of a ferrous metal during extrusion with a parting agent, characterized in that a BN powder, which has a fineness which corresponds to a specific surface area of 10-50 m2/g and contains less than 50 of boric acid or boron oxides, specified as B2O3, and has a moisture content, specified as H20 content, of less than 1%, and has a bulk density of less than 0.5 g/cm3, is fluidized in a storage container by means of a fluidizing gas, the fluidized BN powder is electrostatically charged, and the fluidized BN powder is sprayed onto the surface to be coated in the charged state.
2. The process as claimed in claim 1, characterized in that the BN particles are charged with a voltage of 75-80 kV.
3. The process as claimed in claim 1, characterized in that the fluidizing gas is compressed air or an inert gas.
4. The process as claimed in claim 1, characterized in that the coating is carried out with a delivery-air pressure of 0.5-1.5 bar, a fluidizing air of 0.3-0.8 bar and a total air volume of approximately 5-8 m3/h.
claims
claims
5. The process as claimed in claim 1, characterized is that the coating is carried out with a delivery air pressure of 0.5-1.5 bar, a fluidizing air of 0.3-0.8 bar and a total air volume of approximately 5-8 m3/h.
6.The process as claimed in one of claims 1 to 5.
characterized in that a BN powder with a fineness which corresponds to a specific surface area of 10-50 m2/g is used.
characterized in that a BN powder with a fineness which corresponds to a specific surface area of 10-50 m2/g is used.
7.The process as claimed in one of claims 1 to 6, characterised in that a BN powder which contains less the 5% of boric acid or boron oxides, indicated as B2O3, is used.
8 . The process as claimed in one or claims 1 to 7, characterized in that a BN powder which has a moisture content, indicated as H2O content, of less than 1% is used.
9. The process as claimed in one of claims 1 to 8.
characterized in that a BN powder with a bulk density of less than 0.5 g/cm3 is used.
characterized in that a BN powder with a bulk density of less than 0.5 g/cm3 is used.
10. The use of the process as claimed in one of claims 1 to 9 for coating surfaces during the extrusion of nonferrous metals.
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE19842660.7 | 1998-09-17 | ||
| DE19842660A DE19842660A1 (en) | 1998-09-17 | 1998-09-17 | Process for coating a surface with a release agent |
| PCT/EP1999/006850 WO2000016931A1 (en) | 1998-09-17 | 1999-09-16 | Method for coating a surface with a separating agent |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CA2345922A1 true CA2345922A1 (en) | 2000-03-30 |
Family
ID=7881318
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CA002345922A Abandoned CA2345922A1 (en) | 1998-09-17 | 1999-09-16 | Method for coating a surface with a separating agent |
Country Status (10)
| Country | Link |
|---|---|
| EP (1) | EP1115520B1 (en) |
| JP (1) | JP2002526265A (en) |
| CN (1) | CN1318000A (en) |
| BR (1) | BR9913865A (en) |
| CA (1) | CA2345922A1 (en) |
| DE (2) | DE19842660A1 (en) |
| ES (1) | ES2179700T3 (en) |
| PL (1) | PL347358A1 (en) |
| TW (1) | TW475909B (en) |
| WO (1) | WO2000016931A1 (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2015155678A1 (en) | 2014-04-08 | 2015-10-15 | Asesorias Y Servicios Innovaxxion Spa | Process of forming copper anodes |
Families Citing this family (13)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE19945461A1 (en) * | 1999-09-22 | 2001-04-19 | Linde Gas Ag | Process for improving the magnesium die casting process |
| DE10326769B3 (en) * | 2003-06-13 | 2004-11-11 | Esk Ceramics Gmbh & Co. Kg | Slip for producing long-lasting mold release layer, useful on mold for casting nonferrous metal under pressure, comprises boron nitride suspension in silanized silica in organic solvent or aqueous colloidal zirconia, alumina or boehmite |
| DE102005021688A1 (en) * | 2005-05-11 | 2006-11-16 | Volkswagen Ag | Application of separating material in gravity ingot pouring involves vapor depositing separating material on inner region of mold or suspension can be used as separating material |
| DE102005042475A1 (en) | 2005-09-07 | 2007-03-08 | Ks Aluminium-Technologie Ag | Mold release layer for casting non-ferrous metals |
| DE102006010876A1 (en) | 2006-03-07 | 2007-09-13 | Ks Aluminium-Technologie Ag | Mold release layer for casting non-ferrous metals |
| PL2087953T3 (en) * | 2007-03-28 | 2020-06-01 | Aoki Science Institute Co., Ltd. | Oil-based mold release agent for die casting and use thereof by electrostatic spraying |
| JP4452310B2 (en) * | 2008-06-13 | 2010-04-21 | 新日本製鐵株式会社 | Casting method and casting mold of iron-based alloy in semi-molten or semi-solid state |
| JP5563947B2 (en) * | 2010-10-04 | 2014-07-30 | 昭和電工株式会社 | Extrusion processing method and extrusion processing apparatus |
| TWI505881B (en) * | 2012-07-18 | 2015-11-01 | Min Chi University Of Technology | Method for improving the mold release effect of a metal casting mold |
| DE102014218449A1 (en) * | 2014-09-15 | 2016-03-17 | Schunk Kohlenstofftechnik Gmbh | Mold and method of manufacture |
| CN109465163A (en) * | 2018-12-28 | 2019-03-15 | 深圳市银宝山新科技股份有限公司 | High solid phase semisolid workpiece surface spraying method |
| CN110614291A (en) * | 2019-10-24 | 2019-12-27 | 亚太轻合金(南通)科技有限公司 | Method and device for separating hot-extruded aluminum bar from extrusion rod conveniently |
| KR102639387B1 (en) * | 2021-07-20 | 2024-02-23 | 동국제강 주식회사 | Releasing agent for separating titanium alloy thin plates after hot rolling of pack slab stacked with multiple titanium slabs, releasing agent application apparatus for slab and method for applying releasing agent for slab using the same |
Family Cites Families (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CH629845A5 (en) * | 1977-10-26 | 1982-05-14 | Bbc Brown Boveri & Cie | High-temperature lubricant |
| JPH0688119B2 (en) * | 1988-05-25 | 1994-11-09 | 株式会社アーレスティ | Die casting |
| DE4017603C1 (en) * | 1990-05-31 | 1991-07-18 | Wagner International Ag, Altstaetten, Ch | |
| US5437326A (en) * | 1992-08-18 | 1995-08-01 | Hazelett Strip-Casting Corporation | Method and apparatus for continuous casting of metal |
-
1998
- 1998-09-17 DE DE19842660A patent/DE19842660A1/en not_active Ceased
-
1999
- 1999-09-14 TW TW088115877A patent/TW475909B/en not_active IP Right Cessation
- 1999-09-16 ES ES99969361T patent/ES2179700T3/en not_active Expired - Lifetime
- 1999-09-16 JP JP2000573878A patent/JP2002526265A/en active Pending
- 1999-09-16 EP EP99969361A patent/EP1115520B1/en not_active Expired - Lifetime
- 1999-09-16 PL PL99347358A patent/PL347358A1/en unknown
- 1999-09-16 WO PCT/EP1999/006850 patent/WO2000016931A1/en active IP Right Grant
- 1999-09-16 CA CA002345922A patent/CA2345922A1/en not_active Abandoned
- 1999-09-16 DE DE59901823T patent/DE59901823D1/en not_active Expired - Fee Related
- 1999-09-16 BR BR9913865-4A patent/BR9913865A/en not_active Application Discontinuation
- 1999-09-16 CN CN99811074A patent/CN1318000A/en active Pending
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2015155678A1 (en) | 2014-04-08 | 2015-10-15 | Asesorias Y Servicios Innovaxxion Spa | Process of forming copper anodes |
Also Published As
| Publication number | Publication date |
|---|---|
| TW475909B (en) | 2002-02-11 |
| WO2000016931A1 (en) | 2000-03-30 |
| PL347358A1 (en) | 2002-04-08 |
| DE59901823D1 (en) | 2002-07-25 |
| BR9913865A (en) | 2001-06-05 |
| DE19842660A1 (en) | 2000-03-30 |
| JP2002526265A (en) | 2002-08-20 |
| CN1318000A (en) | 2001-10-17 |
| EP1115520A1 (en) | 2001-07-18 |
| EP1115520B1 (en) | 2002-06-19 |
| ES2179700T3 (en) | 2003-01-16 |
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