WO2011158543A1 - 粉体塗装方法 - Google Patents
粉体塗装方法 Download PDFInfo
- Publication number
- WO2011158543A1 WO2011158543A1 PCT/JP2011/058408 JP2011058408W WO2011158543A1 WO 2011158543 A1 WO2011158543 A1 WO 2011158543A1 JP 2011058408 W JP2011058408 W JP 2011058408W WO 2011158543 A1 WO2011158543 A1 WO 2011158543A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- powder coating
- coating
- spring member
- curing
- temperature
- Prior art date
Links
- 238000000576 coating method Methods 0.000 title claims abstract description 243
- 239000000843 powder Substances 0.000 title claims abstract description 123
- 239000011248 coating agent Substances 0.000 claims abstract description 205
- 229920001187 thermosetting polymer Polymers 0.000 claims abstract description 50
- 238000010438 heat treatment Methods 0.000 claims abstract description 27
- 239000000463 material Substances 0.000 claims abstract description 26
- 229910019142 PO4 Inorganic materials 0.000 claims description 18
- 239000010452 phosphate Substances 0.000 claims description 18
- NBIIXXVUZAFLBC-UHFFFAOYSA-K phosphate Chemical compound [O-]P([O-])([O-])=O NBIIXXVUZAFLBC-UHFFFAOYSA-K 0.000 claims description 18
- 239000003822 epoxy resin Substances 0.000 claims description 13
- 229920000647 polyepoxide Polymers 0.000 claims description 13
- 238000001816 cooling Methods 0.000 claims description 5
- 238000007598 dipping method Methods 0.000 claims description 3
- 239000000758 substrate Substances 0.000 claims description 3
- 230000006698 induction Effects 0.000 claims description 2
- 239000003595 mist Substances 0.000 claims description 2
- 238000010791 quenching Methods 0.000 claims 2
- 230000000171 quenching effect Effects 0.000 claims 2
- 238000005485 electric heating Methods 0.000 claims 1
- 230000001747 exhibiting effect Effects 0.000 abstract 1
- 229910000831 Steel Inorganic materials 0.000 description 19
- 238000001879 gelation Methods 0.000 description 19
- 238000000034 method Methods 0.000 description 19
- 239000010959 steel Substances 0.000 description 19
- 239000004593 Epoxy Substances 0.000 description 15
- 239000007921 spray Substances 0.000 description 15
- 238000012360 testing method Methods 0.000 description 14
- 230000008569 process Effects 0.000 description 13
- 238000005260 corrosion Methods 0.000 description 11
- 230000007797 corrosion Effects 0.000 description 11
- 239000000049 pigment Substances 0.000 description 11
- 150000003839 salts Chemical class 0.000 description 10
- VTYYLEPIZMXCLO-UHFFFAOYSA-L Calcium carbonate Chemical compound [Ca+2].[O-]C([O-])=O VTYYLEPIZMXCLO-UHFFFAOYSA-L 0.000 description 8
- 230000000052 comparative effect Effects 0.000 description 8
- 239000003973 paint Substances 0.000 description 8
- 239000004606 Fillers/Extenders Substances 0.000 description 7
- 239000013078 crystal Substances 0.000 description 7
- 238000010586 diagram Methods 0.000 description 7
- JEIPFZHSYJVQDO-UHFFFAOYSA-N iron(III) oxide Inorganic materials O=[Fe]O[Fe]=O JEIPFZHSYJVQDO-UHFFFAOYSA-N 0.000 description 7
- 229920001225 polyester resin Polymers 0.000 description 7
- 239000004645 polyester resin Substances 0.000 description 7
- CSCPPACGZOOCGX-UHFFFAOYSA-N Acetone Chemical compound CC(C)=O CSCPPACGZOOCGX-UHFFFAOYSA-N 0.000 description 6
- 230000015572 biosynthetic process Effects 0.000 description 6
- 238000007654 immersion Methods 0.000 description 6
- 229920000728 polyester Polymers 0.000 description 6
- 229920005989 resin Polymers 0.000 description 6
- 239000011347 resin Substances 0.000 description 6
- 239000002904 solvent Substances 0.000 description 6
- LRXTYHSAJDENHV-UHFFFAOYSA-H zinc phosphate Chemical compound [Zn+2].[Zn+2].[Zn+2].[O-]P([O-])([O-])=O.[O-]P([O-])([O-])=O LRXTYHSAJDENHV-UHFFFAOYSA-H 0.000 description 6
- 229910000165 zinc phosphate Inorganic materials 0.000 description 6
- 230000000630 rising effect Effects 0.000 description 5
- 229910000019 calcium carbonate Inorganic materials 0.000 description 4
- 239000003795 chemical substances by application Substances 0.000 description 4
- 238000000113 differential scanning calorimetry Methods 0.000 description 4
- 238000002844 melting Methods 0.000 description 4
- 230000008018 melting Effects 0.000 description 4
- 238000010422 painting Methods 0.000 description 4
- 239000002245 particle Substances 0.000 description 4
- LYCAIKOWRPUZTN-UHFFFAOYSA-N Ethylene glycol Chemical compound OCCO LYCAIKOWRPUZTN-UHFFFAOYSA-N 0.000 description 3
- 230000007423 decrease Effects 0.000 description 3
- MTHSVFCYNBDYFN-UHFFFAOYSA-N diethylene glycol Chemical compound OCCOCCO MTHSVFCYNBDYFN-UHFFFAOYSA-N 0.000 description 3
- 239000007788 liquid Substances 0.000 description 3
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 2
- 229910000639 Spring steel Inorganic materials 0.000 description 2
- KKEYFWRCBNTPAC-UHFFFAOYSA-N Terephthalic acid Chemical compound OC(=O)C1=CC=C(C(O)=O)C=C1 KKEYFWRCBNTPAC-UHFFFAOYSA-N 0.000 description 2
- GWEVSGVZZGPLCZ-UHFFFAOYSA-N Titan oxide Chemical compound O=[Ti]=O GWEVSGVZZGPLCZ-UHFFFAOYSA-N 0.000 description 2
- NIXOWILDQLNWCW-UHFFFAOYSA-N acrylic acid group Chemical group C(C=C)(=O)O NIXOWILDQLNWCW-UHFFFAOYSA-N 0.000 description 2
- 239000000654 additive Substances 0.000 description 2
- WNLRTRBMVRJNCN-UHFFFAOYSA-N adipic acid Chemical compound OC(=O)CCCCC(O)=O WNLRTRBMVRJNCN-UHFFFAOYSA-N 0.000 description 2
- TZCXTZWJZNENPQ-UHFFFAOYSA-L barium sulfate Chemical compound [Ba+2].[O-]S([O-])(=O)=O TZCXTZWJZNENPQ-UHFFFAOYSA-L 0.000 description 2
- IISBACLAFKSPIT-UHFFFAOYSA-N bisphenol A Chemical compound C=1C=C(O)C=CC=1C(C)(C)C1=CC=C(O)C=C1 IISBACLAFKSPIT-UHFFFAOYSA-N 0.000 description 2
- PXKLMJQFEQBVLD-UHFFFAOYSA-N bisphenol F Chemical compound C1=CC(O)=CC=C1CC1=CC=C(O)C=C1 PXKLMJQFEQBVLD-UHFFFAOYSA-N 0.000 description 2
- 238000001938 differential scanning calorimetry curve Methods 0.000 description 2
- 238000011156 evaluation Methods 0.000 description 2
- 239000012530 fluid Substances 0.000 description 2
- 229910000398 iron phosphate Inorganic materials 0.000 description 2
- WBJZTOZJJYAKHQ-UHFFFAOYSA-K iron(3+) phosphate Chemical compound [Fe+3].[O-]P([O-])([O-])=O WBJZTOZJJYAKHQ-UHFFFAOYSA-K 0.000 description 2
- QQVIHTHCMHWDBS-UHFFFAOYSA-N isophthalic acid Chemical compound OC(=O)C1=CC=CC(C(O)=O)=C1 QQVIHTHCMHWDBS-UHFFFAOYSA-N 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 239000000155 melt Substances 0.000 description 2
- 238000005480 shot peening Methods 0.000 description 2
- 239000000725 suspension Substances 0.000 description 2
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 2
- 239000011701 zinc Substances 0.000 description 2
- OSNILPMOSNGHLC-UHFFFAOYSA-N 1-[4-methoxy-3-(piperidin-1-ylmethyl)phenyl]ethanone Chemical compound COC1=CC=C(C(C)=O)C=C1CN1CCCCC1 OSNILPMOSNGHLC-UHFFFAOYSA-N 0.000 description 1
- RNFJDJUURJAICM-UHFFFAOYSA-N 2,2,4,4,6,6-hexaphenoxy-1,3,5-triaza-2$l^{5},4$l^{5},6$l^{5}-triphosphacyclohexa-1,3,5-triene Chemical compound N=1P(OC=2C=CC=CC=2)(OC=2C=CC=CC=2)=NP(OC=2C=CC=CC=2)(OC=2C=CC=CC=2)=NP=1(OC=1C=CC=CC=1)OC1=CC=CC=C1 RNFJDJUURJAICM-UHFFFAOYSA-N 0.000 description 1
- CTQNGGLPUBDAKN-UHFFFAOYSA-N O-Xylene Chemical compound CC1=CC=CC=C1C CTQNGGLPUBDAKN-UHFFFAOYSA-N 0.000 description 1
- OFOBLEOULBTSOW-UHFFFAOYSA-N Propanedioic acid Natural products OC(=O)CC(O)=O OFOBLEOULBTSOW-UHFFFAOYSA-N 0.000 description 1
- NRCMAYZCPIVABH-UHFFFAOYSA-N Quinacridone Chemical compound N1C2=CC=CC=C2C(=O)C2=C1C=C1C(=O)C3=CC=CC=C3NC1=C2 NRCMAYZCPIVABH-UHFFFAOYSA-N 0.000 description 1
- KDYFGRWQOYBRFD-UHFFFAOYSA-N Succinic acid Natural products OC(=O)CCC(O)=O KDYFGRWQOYBRFD-UHFFFAOYSA-N 0.000 description 1
- 239000002253 acid Substances 0.000 description 1
- 150000008065 acid anhydrides Chemical class 0.000 description 1
- 230000000996 additive effect Effects 0.000 description 1
- 239000001361 adipic acid Substances 0.000 description 1
- 235000011037 adipic acid Nutrition 0.000 description 1
- 239000003963 antioxidant agent Substances 0.000 description 1
- 230000003078 antioxidant effect Effects 0.000 description 1
- 150000004982 aromatic amines Chemical class 0.000 description 1
- CDQSJQSWAWPGKG-UHFFFAOYSA-N butane-1,1-diol Chemical compound CCCC(O)O CDQSJQSWAWPGKG-UHFFFAOYSA-N 0.000 description 1
- KDYFGRWQOYBRFD-NUQCWPJISA-N butanedioic acid Chemical compound O[14C](=O)CC[14C](O)=O KDYFGRWQOYBRFD-NUQCWPJISA-N 0.000 description 1
- 239000006229 carbon black Substances 0.000 description 1
- 150000001732 carboxylic acid derivatives Chemical class 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 238000007796 conventional method Methods 0.000 description 1
- XCJYREBRNVKWGJ-UHFFFAOYSA-N copper(II) phthalocyanine Chemical compound [Cu+2].C12=CC=CC=C2C(N=C2[N-]C(C3=CC=CC=C32)=N2)=NC1=NC([C]1C=CC=CC1=1)=NC=1N=C1[C]3C=CC=CC3=C2[N-]1 XCJYREBRNVKWGJ-UHFFFAOYSA-N 0.000 description 1
- 238000001723 curing Methods 0.000 description 1
- QGBSISYHAICWAH-UHFFFAOYSA-N dicyandiamide Chemical class NC(N)=NC#N QGBSISYHAICWAH-UHFFFAOYSA-N 0.000 description 1
- 238000009503 electrostatic coating Methods 0.000 description 1
- 238000003912 environmental pollution Methods 0.000 description 1
- 239000003063 flame retardant Substances 0.000 description 1
- 230000012447 hatching Effects 0.000 description 1
- ACCCMOQWYVYDOT-UHFFFAOYSA-N hexane-1,1-diol Chemical compound CCCCCC(O)O ACCCMOQWYVYDOT-UHFFFAOYSA-N 0.000 description 1
- 239000003112 inhibitor Substances 0.000 description 1
- 239000001023 inorganic pigment Substances 0.000 description 1
- XEEYBQQBJWHFJM-UHFFFAOYSA-N iron Substances [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 1
- 230000001788 irregular Effects 0.000 description 1
- ZLNQQNXFFQJAID-UHFFFAOYSA-L magnesium carbonate Chemical compound [Mg+2].[O-]C([O-])=O ZLNQQNXFFQJAID-UHFFFAOYSA-L 0.000 description 1
- 239000001095 magnesium carbonate Substances 0.000 description 1
- 229910000021 magnesium carbonate Inorganic materials 0.000 description 1
- VZCYOOQTPOCHFL-UPHRSURJSA-N maleic acid Chemical compound OC(=O)\C=C/C(O)=O VZCYOOQTPOCHFL-UPHRSURJSA-N 0.000 description 1
- 239000011976 maleic acid Substances 0.000 description 1
- 229910052751 metal Inorganic materials 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 238000002156 mixing Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 150000007524 organic acids Chemical class 0.000 description 1
- 239000012860 organic pigment Substances 0.000 description 1
- 238000007591 painting process Methods 0.000 description 1
- 230000035515 penetration Effects 0.000 description 1
- UWJJYHHHVWZFEP-UHFFFAOYSA-N pentane-1,1-diol Chemical compound CCCCC(O)O UWJJYHHHVWZFEP-UHFFFAOYSA-N 0.000 description 1
- 239000005011 phenolic resin Substances 0.000 description 1
- 238000006068 polycondensation reaction Methods 0.000 description 1
- ULWHHBHJGPPBCO-UHFFFAOYSA-N propane-1,1-diol Chemical compound CCC(O)O ULWHHBHJGPPBCO-UHFFFAOYSA-N 0.000 description 1
- 239000000377 silicon dioxide Substances 0.000 description 1
- 239000003381 stabilizer Substances 0.000 description 1
- 150000005846 sugar alcohols Polymers 0.000 description 1
- 230000003746 surface roughness Effects 0.000 description 1
- 230000008961 swelling Effects 0.000 description 1
- 239000000454 talc Substances 0.000 description 1
- 229910052623 talc Inorganic materials 0.000 description 1
- 238000010998 test method Methods 0.000 description 1
- 230000036962 time dependent Effects 0.000 description 1
- 239000004408 titanium dioxide Substances 0.000 description 1
- VZCYOOQTPOCHFL-UHFFFAOYSA-N trans-butenedioic acid Natural products OC(=O)C=CC(O)=O VZCYOOQTPOCHFL-UHFFFAOYSA-N 0.000 description 1
- 238000005809 transesterification reaction Methods 0.000 description 1
- 238000012546 transfer Methods 0.000 description 1
- 230000009466 transformation Effects 0.000 description 1
- ZIBGPFATKBEMQZ-UHFFFAOYSA-N triethylene glycol Chemical compound OCCOCCOCCO ZIBGPFATKBEMQZ-UHFFFAOYSA-N 0.000 description 1
- 239000006097 ultraviolet radiation absorber Substances 0.000 description 1
- 239000008096 xylene Substances 0.000 description 1
Images
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16F—SPRINGS; SHOCK-ABSORBERS; MEANS FOR DAMPING VIBRATION
- F16F1/00—Springs
- F16F1/02—Springs made of steel or other material having low internal friction; Wound, torsion, leaf, cup, ring or the like springs, the material of the spring not being relevant
- F16F1/024—Covers or coatings therefor
-
- 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
- B05D5/00—Processes for applying liquids or other fluent materials to surfaces to obtain special surface effects, finishes or structures
-
- 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
- B05D1/02—Processes for applying liquids or other fluent materials performed by spraying
- B05D1/04—Processes for applying liquids or other fluent materials performed by spraying involving the use of an electrostatic field
-
- 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
- B05D2401/00—Form of the coating product, e.g. solution, water dispersion, powders or the like
- B05D2401/30—Form of the coating product, e.g. solution, water dispersion, powders or the like the coating being applied in other forms than involving eliminable solvent, diluent or dispersant
- B05D2401/32—Form of the coating product, e.g. solution, water dispersion, powders or the like the coating being applied in other forms than involving eliminable solvent, diluent or dispersant applied as powders
-
- 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
- B05D3/0209—Multistage baking
-
- 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
-
- 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
- B05D7/51—One specific pretreatment, e.g. phosphatation, chromatation, in combination with one specific coating
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16F—SPRINGS; SHOCK-ABSORBERS; MEANS FOR DAMPING VIBRATION
- F16F2226/00—Manufacturing; Treatments
- F16F2226/02—Surface treatments
Definitions
- the present invention relates to a powder coating method capable of forming a coating film excellent in adhesion and surface properties.
- suspension springs are used in automobiles, railway vehicles, and the like.
- the surface of the suspension spring is usually painted to give corrosion resistance.
- Examples of the coating method include liquid coating using a liquid paint and powder coating using a powder paint.
- powder coating has advantages such as less scattering of paint and easy collection, and no use of solvent, so there is no concern about environmental pollution.
- powder coating usually, a charged powder coating is electrostatically attached to an object to be grounded, and then the powder coating is melted and cured by heating to form a coating film.
- FIG. 4 the schematic diagram of the formation process of the coating film in the conventional powder coating method is shown.
- a powder coating 100a is attached to the object 101 (1).
- the article 101 is not heated.
- the attached powder coating 100a gradually melts as the temperature rises (2).
- the melted powder coating material 100a penetrates into fine irregularities on the surface of the article 101 to be coated.
- the coating-film surface is smoothed (leveling) and the powder coating material 100a hardens
- the coating film 100b is obtained by cooling (4).
- the powder coating is attached to the object to be coated, and then heating is started. For example, when heated in a hot air furnace, heat is applied from the surface side of the powder coating. For this reason, the temperature rise is faster toward the surface side of the powder coating material.
- the temperature rise of the powder paint on the object side is slower than that on the surface side. That is, a temperature difference occurred in the thickness direction of the powder coating during the temperature rising process. This causes a difference in the progress of melting and curing in the thickness direction of the powder coating material. This contributed to a decrease in the adhesion of the coating film. Further, since curing begins in the temperature rising process, leveling becomes insufficient, and unevenness tends to remain on the coating film surface. Thus, according to the conventional powder coating method, it was difficult to obtain a coating film excellent in adhesion and surface properties.
- Patent Document 4 discloses a powder coating method in which an epoxy powder coating and an acrylic powder coating are sequentially applied in a state where a steel material to be coated is preheated to 160 to 300 ° C. Further, paragraph [0034] of Patent Document 4 describes that by applying an epoxy powder coating to a preheated steel material, adhesion with an acrylic coating film laminated thereon is improved.
- the temperature difference in the thickness direction of the adhered powder coating is reduced by heating the object to be coated in advance.
- the temperature range of preheating is too wide. For example, when an epoxy-based thermosetting powder coating is attached to an object heated to a high temperature close to 300 ° C., the surface of the coating film becomes rough and the desired surface properties cannot be obtained. That is, when a thermosetting powder coating is used, it is difficult to obtain a coating film that satisfies adhesion and surface properties in the entire preheating temperature range.
- This invention is made
- the powder coating method of the present invention includes a heating step of heating a spring member, and the surface temperature T (° C.) of the spring member is T f ⁇ 20 ⁇ T ⁇ T f +20 (T f : thermosetting powder coating
- T f thermosetting powder coating
- the thermosetting powder coating is applied while the spring member is heated in advance and the surface temperature T (° C.) of the spring member is T f ⁇ 20 ⁇ T ⁇ T f +20.
- Tf is a curing completion point temperature (° C.) of the thermosetting powder coating material.
- the cure completion point temperature can be obtained by differential scanning calorimetry (DSC).
- DSC differential scanning calorimetry
- thermosetting powder coating when the thermosetting powder coating is heated, first, an endothermic peak indicating melting appears. Next, an exothermic peak indicating curing appears. From the start point and end point of the latter exothermic peak, the curing start point temperature (T s ) and the curing completion point temperature (T f ) of the thermosetting powder coating material can be determined.
- FIG. 2 the schematic diagram of the formation process of the coating film in the powder coating method of this invention is shown.
- the spring member 21 is heated.
- T ° C.
- the heating is stopped and coating is started. That is, the thermosetting powder coating 20a is adhered to the surface of the spring member 21 (1).
- the surface temperature of the spring member 21 decreases with time.
- the thermosetting powder coating 20a adhering to the surface of the spring member 21 is melted by the residual heat of the spring member 21 and penetrates into the fine irregularities on the surface of the spring member 21 (2).
- the surface of the coating film is smoothed (leveled), and the thermosetting powder coating material 20a is cured (3).
- the coating film 20b is obtained by completion of hardening (4).
- the surface temperature of the spring member is raised to near the curing completion point temperature (T f ) of the thermosetting powder coating.
- T f curing completion point temperature
- the crystal water contained in the phosphate film can be evaporated.
- production of the micro blow hole in a coating film is suppressed, and the adhesiveness of a coating film improves.
- the surface temperature of the spring member is high in advance, the adhering thermosetting powder coating melts quickly. At this time, a difference in melting and curing hardly occurs in the thickness direction of the thermosetting powder coating.
- the viscosity of the melted thermosetting powder coating is relatively low. For this reason, it is easy to spread on the surface of the spring member, and penetration into fine irregularities on the surface is quick. Therefore, the coating film surface is easily smoothed. Also, the curing time is shortened.
- the powder coating method of the present invention it is possible to form a good-looking coating film having high adhesion and excellent surface properties. Further, since the curing time can be shortened, the production efficiency can be improved.
- thermosetting powder coating 20b coating 21: spring member 100a: powder coating 100b: coating 101: object to be coated
- the powder coating method of the present invention includes a heating process, a coating process, and a curing process. Hereinafter, each process is demonstrated in order.
- This step is a step of heating the spring member.
- the kind of spring member is not particularly limited.
- various spring members such as a coil spring, a leaf spring, a torsion bar, and a stabilizer can be used.
- the material of the spring member is not particularly limited as long as it is a metal.
- Spring steel generally used for springs is suitable. About a spring member, after carrying out hot forming or cold forming of spring steel etc., it is good to give shot peening etc. and to adjust surface roughness, for example.
- the powder coating method of the present invention may be configured to include a pretreatment step of forming a phosphate film in advance on the substrate surface of the spring member before this step.
- a pretreatment step of forming a phosphate film in advance on the substrate surface of the spring member before this step.
- the corrosion resistance and the adhesion of the coating film are improved.
- the phosphate film covers 80% or more of the area of the painted surface of the spring member.
- the corrosion resistance is further improved.
- the formation of the phosphate film may be performed according to a known method. For example, a dipping method in which a spring member is immersed in a phosphate solution bath, a spray method in which a phosphate solution is sprayed onto the spring member with a spray gun or the like may be used.
- the film mass of the formed phosphate film is not particularly limited. In general, a coating mass of about 1.8 to 2.3 g / m 2 is required for imparting corrosion resistance with a phosphate coating. On the other hand, the smaller the coating mass, the higher the adhesion of the coating. Therefore, when the adhesion of the coating film is taken into consideration, the coating mass should be 2.2 g / m 2 or less.
- the film mass can be obtained by measuring the mass of the formed film, or can be obtained by converting from the discharge amount of the spray gun when the film is formed by the spray method.
- the crystals of zinc phosphate in the phosphate film are Zn 3 (PO 4 ) 2 .4H 2 O (orthorhombic), Zn 2 Fe (PO 4 ) 2 .4H 2 O (monoclinic), and Consists of.
- the shape and size of such phosphate crystals also affect the corrosion resistance and coating adhesion.
- the crystal shape of the phosphate is desirably close to a sphere, and the average crystal diameter is preferably 3 ⁇ m or less.
- the average diameter of the crystals may be measured by observing the phosphate film with a scanning electron microscope (SEM) or the like. In this specification, the average value of the major axis diameter in each crystal observed by SEM is adopted as the average diameter.
- the heating method of the spring member is not particularly limited.
- the spring member may be housed in a hot air furnace, a far infrared furnace, or the like and heated.
- the spring member may be energized or induction heated.
- current heating is preferable because it has high thermal efficiency and can be heated regardless of the shape of the spring member.
- the surface temperature of the spring member may be measured using a non-contact thermometer such as a thermograph, for example.
- thermosetting powder coating is attached to the surface of the spring member.
- thermosetting powder coating is adhered to the surface of the spring member.
- the usual methods used for powder coating for example, electrostatic coating, electrostatic fluid immersion, fluid immersion, etc., are used. That's fine.
- the surface temperature of the spring member is less than T f ⁇ 20 (° C.), it is difficult to sufficiently advance the curing due to the residual heat of the spring member. Further, since the melted thermosetting powder coating has a high viscosity, it is difficult to spread on the surface of the spring member, and there is a risk that irregularities remain on the surface of the coating film. On the other hand, when the surface temperature of the spring member is T f +20 (° C.) or higher, the surface of the coating film becomes rough, and a desired surface property cannot be obtained.
- the thermosetting powder coating used is composed mainly of a base resin, a curing agent, and a pigment, which are the bases for coating film formation.
- the base resin include an epoxy resin and a polyester resin. From the viewpoint of further improving the corrosion resistance, it is desirable to include an epoxy resin.
- the aspect containing an epoxy resin and a polyester resin is suitable.
- the polyester resin and the epoxy resin react to cure. That is, the polyester resin serves as a base resin, and the epoxy resin serves as a curing agent.
- the blending ratio of the epoxy resin and the polyester resin is not particularly limited, but for example, the equivalent ratio is preferably 1: 1.
- polyester resins include polyhydric alcohols such as ethylene glycol, diethylene glycol, triethylene glycol, propanediol, butanediol, pentanediol, hexanediol, terephthalic acid, maleic acid, isophthalic acid, succinic acid, adipic acid, and sebatin.
- resins obtained by transesterification or polycondensation reaction with a carboxylic acid such as an acid One kind of these resins may be used alone, or two or more kinds may be mixed and used.
- curing agent examples include aromatic amines, acid anhydrides, dicyandiamide derivatives, organic acid dihydrazide derivatives, phenol resins, and the like.
- the pigment examples include, for example, inorganic pigments such as carbon black, titanium dioxide, bengara, and ocher, and organic pigments such as quinacridone red, phthalocyanine blue, and benzidine yellow.
- extender pigments include calcium carbonate, magnesium carbonate, talc, silica, and barium sulfate.
- extender pigments are important because they affect the mechanical properties of the coating. For example, if the particle size of the particles constituting the extender pigment is small, the flexibility of the coating film is improved. Therefore, for example, when calcium carbonate is used as the extender pigment, the average particle diameter is preferably about 0.5 ⁇ m.
- the impact resistance of the coating film also changes depending on the particle shape such as scale shape, indefinite shape, or needle shape. From the viewpoint of improving the impact resistance of the coating film, it is desirable to use an extender pigment having an acicular or irregular shape.
- the content ratio of the pigment in the thermosetting powder coating is not particularly limited. For example, from the viewpoint of concealability, it may be 2% by mass or more when the total mass of the coating is 100% by mass. desirable. On the other hand, in consideration of the dispersibility of the pigment, it is desirable to set it to 60% by mass or less when the total mass of the paint is 100% by mass.
- thermosetting powder coating material may contain various additives as required in addition to the above.
- additives include a surface conditioner, an ultraviolet absorber, an antioxidant, a charge inhibitor, and a flame retardant.
- thermosetting powder coating in this step may be performed once or twice or more. That is, after the thermosetting powder coating is adhered to the surface of the spring member, the thermosetting powder coating may be repeatedly adhered by being laminated on the coating. For example, a two-layer coating film can be formed by performing coating twice. When coating is performed a plurality of times, it is desirable to perform the coating continuously.
- the kind of thermosetting powder coating to be used may be the same or different. For example, when the same kind of resin is contained in the laminated coating film, the adhesion between the coating films becomes high. For this reason, even if the big distortion peculiar to a spring member arises, coating films are hard to exfoliate. Moreover, the followability with respect to a deformation
- thermosetting powder coating may be cured in a cooled state. That is, the thermosetting powder coating may be cured by the residual heat of the spring member.
- T (° C.) of the spring member at the completion of the curing is T s + 30 ⁇ T (T s : the curing starting point temperature (° C.) of the thermosetting powder coating material. ) Is desirable. This is because when the surface temperature of the spring member is less than T s + 30 ° C., curing is difficult to proceed.
- the surface temperature of the spring member becomes less than T s + 30 ° C. before the curing is completed, it is desirable to perform heating again to increase the surface temperature of the spring member. That is, in this step, it is desirable to cure the thermosetting powder coating material by further heating.
- the curing start point temperature T s can be obtained by DSC as shown in FIG.
- FIG. 3 schematically shows changes over time in the surface temperature of the spring member in the powder coating method of the present invention.
- the spring member is heated, and coating is started while the surface temperature T (° C.) of the spring member is in the range of T f ⁇ 20 ⁇ T ⁇ T f +20.
- the surface temperature of the spring member decreases with time due to cooling. It is desirable that the curing be performed within a curable region indicated by hatching. In other words, it is desirable that the curing is completed while the surface temperature of the spring member is T s + 30 ° C. or higher.
- the surface temperature of the spring member at the start of painting is T s + 30 ° C. or more, it will cure sufficiently Can be made.
- the degree of curing can be confirmed by measuring the gelation rate of the coating film.
- the coating temperature is rapidly cooled below the melting temperature of the thermosetting powder coating in order to facilitate handling while maintaining the quality of the coating surface. It is desirable. That is, what is necessary is just to comprise the powder coating method of this invention including the rapid cooling process of rapidly cooling a coating film after this process.
- the coating film may be rapidly cooled by blast, mist, shower, dipping, or the like.
- the appearance of the obtained coating film was visually observed to evaluate the state of the coating film surface. Moreover, the gelation rate of the coating film was measured. That is, first, a part of the coating film was scraped to obtain a sample, and the mass of the sample was measured. Next, the sample was immersed in acetone for 3 hours. And the sample after immersion was dried and the mass was measured. From the mass before and after immersion in acetone, the gelation rate was calculated by the above formula (I). The coating film was evaluated by the surface state of the coating film and the gelation rate. The results are shown in Table 1. In Table 1, in the column for evaluation, those having a gelation rate of 90% or more and having a good surface condition are indicated by ⁇ , and the others are indicated by X.
- the gelation rate was 90% or more, and the surface condition was also good. That is, curing was sufficiently advanced, the coating film surface was smooth and undulation was small.
- Sample 1-1 which started coating when the surface temperature of the steel pipe was less than 175.0 ° C., had a good surface state, but had a low gelation rate and did not sufficiently cure. This is considered to be because the surface temperature of the steel pipe became less than 141.7 ° C.
- Samples 1-4 and 1-5 which started coating when the surface temperature of the steel pipe was 215.0 ° C. or higher, had a high gelation rate but a poor surface condition. That is, since the coating start temperature was too high, the coating surface was roughened.
- the epoxy-based powder coating contains an epoxy resin, a curing agent, and an extender pigment (calcium carbonate) as main components.
- the curing start point temperature (T s ) and the curing completion point temperature (T f ) of the epoxy powder coating material were determined by DSC (temperature rising condition: 10 ° C./min).
- T s 105.0 ° C.
- T f 174.9 ° C.
- T s + 30 135.0 ° C.
- T f ⁇ 20 ° C. 154.9 ° C.
- T f + 20 194.9 ° C.
- the appearance of the obtained coating film was visually observed to evaluate the state of the coating film surface. Moreover, the gelation rate of the coating film was measured like said (1).
- the coating film was evaluated by the surface state of the coating film and the gelation rate. The results are shown in Table 2. In Table 2, in the column for evaluation, those having a gelation rate of 90% or more and having a good surface state are indicated by ⁇ , and the others are indicated by X.
- samples 2-2, 2-2 which started coating when the surface temperature of the steel pipe was 154.9 ° C. or higher and lower than 194.9 ° C. within the range of T f ⁇ 20 ⁇ T ⁇ T f +20.
- the gelation rate was 90% or more, and the surface condition was also good. That is, curing was sufficiently advanced, the coating film surface was smooth and undulation was small.
- Sample 2-1 which started coating when the surface temperature of the steel pipe was less than 154.9 ° C. had a good surface state, but the gelation rate was low and the curing did not proceed sufficiently. This is thought to be because the surface temperature of the steel pipe was less than 135.0 ° C.
- thermosetting powder coating and forming a coating with a steel pipe surface temperature T in the range of T f ⁇ 20 ⁇ T ⁇ T f +20, a coating film with a smooth and good-looking coating film is formed. Confirmed that you can.
- coating film of example The coating film formed from an epoxy / polyester powder coating (sample 1-3 above, hereinafter referred to as “coating film of example”) was subjected to a corrosion resistance test to evaluate adhesion.
- the corrosion resistance test was performed according to 4.6 “corrosion resistance test method” of JIS D 0202 (1988).
- the test time for the salt spray test was 720 hours.
- a coating film (hereinafter referred to as “coating film of comparative example”) formed by a conventional powder coating method (coating after coating and heating and curing) using the same powder coating is also used.
- the corrosion resistance test was conducted to evaluate the adhesion.
- FIG. 5 the photograph of the coating film of the Example before a salt spray test is shown.
- FIG. 5 the photograph of the coating film of the Example before a salt spray test is shown.
- FIG. 6 the enlarged photograph of the rust part in the coating-film surface of the Example after the salt spray test 720 hours is shown.
- FIG. 7 the photograph of the coating film of the comparative example before a salt spray test is shown.
- FIG. 8 the enlarged photograph of the rust part in the coating-film surface of the comparative example after 720 hours of the salt spray test is shown.
Landscapes
- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Application Of Or Painting With Fluid Materials (AREA)
Abstract
Description
100a:粉体塗料 100b:塗膜 101:被塗装物
本工程は、ばね部材を加熱する工程である。ばね部材の種類は、特に限定されない。例えば、コイルスプリング、リーフスプリング、トーションバー、スタビライザ等の種々のばね部材を用いることができる。ばね部材の材質も、金属であれば特に限定されない。一般にばね用として用いられるばね鋼等が好適である。ばね部材については、例えば、ばね鋼等を熱間または冷間成形した後、ショットピーニング等を施して、表面粗さを調整しておくとよい。
本工程は、加熱したばね部材の表面温度T(℃)がTf-20≦T<Tf+20(Tf:熱硬化性粉体塗料の硬化完了点温度(℃))に達した状態で、熱硬化性粉体塗料をばね部材の表面に付着させる工程である。
本工程は、ばね部材の表面に付着した熱硬化性粉体塗料を硬化させる工程である。熱硬化性粉体塗料の硬化は、原則、放冷した状態で行えばよい。すなわち、ばね部材の余熱により、熱硬化性粉体塗料を硬化させればよい。ここで、硬化を充分に行うためには、硬化完了時のばね部材の表面温度T(℃)は、Ts+30≦T(Ts:熱硬化性粉体塗料の硬化開始点温度(℃))であることが望ましい。ばね部材の表面温度が、Ts+30℃未満になると、硬化が進行しにくくなるからである。したがって、硬化が完了する以前に、ばね部材の表面温度がTs+30℃未満になる場合には、再度加熱を行い、ばね部材の表面温度を上昇させることが望ましい。すなわち、本工程において、さらに加熱することにより、熱硬化性粉体塗料を硬化させることが望ましい。なお、硬化開始点温度Tsは、前出図1に示したように、DSCにより得ることができる。
ゲル化率(%)=溶剤浸漬後の試料の乾燥質量/溶剤浸漬前の試料の質量×100・・・(I)
硬化が進行している程、ゲル化率は高くなる。例えば、ゲル化率が90%以上であれば、硬化が充分に進行していると判断することができる。
(1)エポキシ/ポリエステル系粉体塗料による塗装
まず、鋼管(材質STKM13A、外径φ23mm、肉厚6mm、長さ200mm)の表面をショットピーニング処理した。続いて、該表面にスプレー法にてリン酸亜鉛皮膜を形成した。次に、鋼管を熱風炉内で加熱した後、取り出した。そして、鋼管の表面温度を熱電対で測定し、所定の温度になったところで、コロナ帯電塗装ガンを用いてエポキシ/ポリエステル系粉体塗料を鋼管の表面に付着させた。この際、塗膜厚さが60~100μmとなるように調整した。その後は、加熱することなく、エポキシ/ポリエステル系粉体塗料を硬化させた。
上記(1)と同様の鋼管(ショットピーニング処理後、リン酸亜鉛皮膜形成)に、エポキシ系粉体塗料による塗装を行った。まず、鋼管を熱風炉内で加熱した後、取り出した。次に、鋼管の表面温度を熱電対で測定し、所定の温度になったところで、コロナ帯電塗装ガンを用いてエポキシ系粉体塗料を鋼管の表面に付着させた。この際、塗膜厚さが60~100μmとなるように調整した。その後は、加熱することなく、エポキシ系粉体塗料を硬化させた。
エポキシ/ポリエステル系粉体塗料から形成された塗膜(上記試料1-3、以下「実施例の塗膜」と称す)について、耐食性試験を行い、密着性を評価した。耐食性試験は、JIS D 0202(1988)の4.6「耐食性試験方法」に準じて行った。塩水噴霧試験の試験時間は720時間とした。また、比較のため、同じ粉体塗料を用いて、従来の粉体塗装方法(塗料付着後、加熱して硬化)により形成された塗膜(以下「比較例の塗膜」と称す)についても、耐食性試験を行い、密着性を評価した。図5に、塩水噴霧試験前の実施例の塗膜の写真を示す。図6に、塩水噴霧試験720時間後の実施例の塗膜表面における錆部の拡大写真を示す。図7に、塩水噴霧試験前の比較例の塗膜の写真を示す。図8に、塩水噴霧試験720時間後の比較例の塗膜表面における錆部の拡大写真を示す。
Claims (9)
- ばね部材を加熱する加熱工程と、
該ばね部材の表面温度T(℃)がTf-20≦T<Tf+20(Tf:熱硬化性粉体塗料の硬化完了点温度(℃))に達した状態で、該熱硬化性粉体塗料を該ばね部材の表面に付着させる塗装工程と、
付着した該熱硬化性粉体塗料を硬化させる硬化工程と、
を有することを特徴とする粉体塗装方法。 - 前記硬化工程において、硬化完了時の前記ばね部材の表面温度T(℃)は、Ts+30≦T(Ts:前記熱硬化性粉体塗料の硬化開始点温度(℃))である請求項1に記載の粉体塗装方法。
- 前記硬化工程は、前記ばね部材の余熱により前記熱硬化性粉体塗料を硬化させる請求項1または請求項2に記載の粉体塗装方法。
- 前記硬化工程は、さらに加熱することにより前記熱硬化性粉体塗料を硬化させる請求項1または請求項2に記載の粉体塗装方法。
- 前記硬化工程の後に、塗膜を急冷する急冷工程を有する請求項1ないし請求項4のいずれかに記載の粉体塗装方法。
- 前記塗膜の急冷は、衝風、ミスト、シャワー、およびディッピングのうちのいずれかの方法で行う請求項5に記載の粉体塗装方法。
- 前記熱硬化性粉体塗料は、エポキシ樹脂を含む請求項1ないし請求項6のいずれかに記載の粉体塗装方法。
- 前記加熱工程における前記ばね部材の加熱は、熱風炉、通電加熱、および誘導加熱のうちのいずれかで行う請求項1ないし請求項7のいずれかに記載の粉体塗装方法。
- 前記加熱工程の前に、前記ばね部材の素地表面に予めリン酸塩皮膜を形成する前処理工程を有する請求項1ないし請求項8のいずれかに記載の粉体塗装方法。
Priority Applications (4)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
CN2011800287716A CN102947012A (zh) | 2010-06-14 | 2011-04-01 | 粉体涂装方法 |
DE112011101987T DE112011101987T8 (de) | 2010-06-14 | 2011-04-01 | Pulverbeschichtungsverfahren |
BR112012031819A BR112012031819A2 (pt) | 2010-06-14 | 2011-04-01 | método de revestimento em pó |
US13/701,949 US20130108785A1 (en) | 2010-06-14 | 2011-04-01 | Powder coating method |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP2010134915A JP5606807B2 (ja) | 2010-06-14 | 2010-06-14 | 粉体塗装方法 |
JP2010-134915 | 2010-06-14 |
Publications (1)
Publication Number | Publication Date |
---|---|
WO2011158543A1 true WO2011158543A1 (ja) | 2011-12-22 |
Family
ID=45347955
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/JP2011/058408 WO2011158543A1 (ja) | 2010-06-14 | 2011-04-01 | 粉体塗装方法 |
Country Status (6)
Country | Link |
---|---|
US (1) | US20130108785A1 (ja) |
JP (1) | JP5606807B2 (ja) |
CN (1) | CN102947012A (ja) |
BR (1) | BR112012031819A2 (ja) |
DE (1) | DE112011101987T8 (ja) |
WO (1) | WO2011158543A1 (ja) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO2017069018A1 (ja) * | 2015-10-23 | 2017-04-27 | 日本発條株式会社 | スタビライザのための塗料吹付装置と塗装設備および塗装方法 |
Families Citing this family (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2014018727A (ja) * | 2012-07-17 | 2014-02-03 | Chuo Spring Co Ltd | ばね部材 |
JP6405083B2 (ja) * | 2012-08-10 | 2018-10-17 | Ntn株式会社 | 金属製自動車部品の塗膜の形成方法 |
JP6408933B2 (ja) | 2014-08-28 | 2018-10-17 | 日本発條株式会社 | 車両用サスペンション部材 |
CN106040550A (zh) * | 2016-07-25 | 2016-10-26 | 铜陵海源超微粉体有限公司 | 粉体上料方法 |
JP6868198B2 (ja) * | 2017-11-09 | 2021-05-12 | 日立金属株式会社 | 絶縁バスバーの製造方法及び積層絶縁バスバーの製造方法 |
US20200062969A1 (en) * | 2018-08-27 | 2020-02-27 | Ppg Industries Ohio, Inc. | Coated substrates and methods of preparing the same |
Citations (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS6012111B2 (ja) * | 1981-04-17 | 1985-03-29 | 新日本製鐵株式会社 | 被覆ばねの製造法 |
JPS613548B2 (ja) * | 1981-02-18 | 1986-02-03 | Nhk Spring Co Ltd | |
JP2007198490A (ja) * | 2006-01-26 | 2007-08-09 | Chuo Spring Co Ltd | 高耐久性ばねおよびその塗装方法 |
JP2009125629A (ja) * | 2007-11-20 | 2009-06-11 | Showa Corp | コイルばねの被覆部形成方法 |
Family Cites Families (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS61234974A (ja) * | 1985-04-08 | 1986-10-20 | Supirurina Kenkyusho:Kk | 鉄筋コンクリ−ト用の鉄筋の防蝕被覆法及びその被覆装置 |
FR2638466B1 (fr) * | 1988-11-03 | 1993-05-07 | Atochem | Procede pour revetir des substrats metalliques a l'aide d'un primaire en poudre et d'un revetement superficiel applique par trempage, compositions de primaire en poudre utilisees et materiaux composites obtenus |
JPH04180867A (ja) * | 1990-11-13 | 1992-06-29 | Kawasaki Steel Corp | 鋼管のエポキシ樹脂粉体塗装方法 |
JP2544692B2 (ja) | 1992-04-21 | 1996-10-16 | ソマール株式会社 | 粉体塗装方法 |
JPH10314658A (ja) | 1997-05-22 | 1998-12-02 | Sankyo Seiki Mfg Co Ltd | 粉体塗装方法、および電機子コアの製造方法 |
JP2002233819A (ja) | 2001-02-08 | 2002-08-20 | Nippon Paint Co Ltd | 鋼材の粉体塗装方法および粉体塗装鋼材 |
JP4907054B2 (ja) * | 2003-12-09 | 2012-03-28 | 中央発條株式会社 | 高耐久性ばねおよびその塗装方法 |
-
2010
- 2010-06-14 JP JP2010134915A patent/JP5606807B2/ja active Active
-
2011
- 2011-04-01 DE DE112011101987T patent/DE112011101987T8/de not_active Ceased
- 2011-04-01 WO PCT/JP2011/058408 patent/WO2011158543A1/ja active Application Filing
- 2011-04-01 BR BR112012031819A patent/BR112012031819A2/pt not_active IP Right Cessation
- 2011-04-01 US US13/701,949 patent/US20130108785A1/en not_active Abandoned
- 2011-04-01 CN CN2011800287716A patent/CN102947012A/zh active Pending
Patent Citations (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS613548B2 (ja) * | 1981-02-18 | 1986-02-03 | Nhk Spring Co Ltd | |
JPS6012111B2 (ja) * | 1981-04-17 | 1985-03-29 | 新日本製鐵株式会社 | 被覆ばねの製造法 |
JP2007198490A (ja) * | 2006-01-26 | 2007-08-09 | Chuo Spring Co Ltd | 高耐久性ばねおよびその塗装方法 |
JP2009125629A (ja) * | 2007-11-20 | 2009-06-11 | Showa Corp | コイルばねの被覆部形成方法 |
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO2017069018A1 (ja) * | 2015-10-23 | 2017-04-27 | 日本発條株式会社 | スタビライザのための塗料吹付装置と塗装設備および塗装方法 |
JPWO2017069018A1 (ja) * | 2015-10-23 | 2018-04-05 | 日本発條株式会社 | スタビライザのための塗料吹付装置と塗装設備および塗装方法 |
US10792683B2 (en) | 2015-10-23 | 2020-10-06 | Nhk Spring Co., Ltd. | Paint spraying apparatus for stabilizer, coating installation, and coating method |
Also Published As
Publication number | Publication date |
---|---|
DE112011101987T8 (de) | 2013-09-05 |
JP5606807B2 (ja) | 2014-10-15 |
DE112011101987T5 (de) | 2013-06-27 |
BR112012031819A2 (pt) | 2016-11-01 |
JP2012000530A (ja) | 2012-01-05 |
US20130108785A1 (en) | 2013-05-02 |
CN102947012A (zh) | 2013-02-27 |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
JP5606807B2 (ja) | 粉体塗装方法 | |
JP4723390B2 (ja) | 高耐久性ばねおよびその塗装方法 | |
JP5570502B2 (ja) | 金属ストリップのコーティング方法 | |
JP4907054B2 (ja) | 高耐久性ばねおよびその塗装方法 | |
TW200840884A (en) | Conductive, organic coatings with reduced wall thickness and good formability | |
JP5948164B2 (ja) | 複層塗膜形成方法 | |
JP6817289B2 (ja) | 高耐久性ばねおよびその塗装方法 | |
JP2009078263A (ja) | 防錆処理された金属部材およびコート塗料 | |
WO2014013827A1 (ja) | ばね部材 | |
JP6435183B2 (ja) | ばね部材 | |
JP2003083376A (ja) | 板ばね及びその製造方法 | |
JP2002543998A (ja) | 溶接可能な、コーティングされた金属基材、ならびにその調製および腐食抑制方法 | |
WO2017082170A1 (ja) | 植毛粉体塗装方法 | |
US20050181139A1 (en) | Process for applying a multi-layer coating to ferrous substrates | |
JP6289222B2 (ja) | 耐食性マグネシウム合金鍛造ホイール及びその製造方法 | |
JP2017087129A (ja) | 植毛粉体塗装方法 | |
JP2005238222A (ja) | 複層塗膜形成方法 | |
WO2013099513A1 (ja) | ばね部材の塗装方法 | |
JP4581742B2 (ja) | 耐震性及び防食性に優れた樹脂被覆鋼管及びその製造方法 | |
JP4817506B2 (ja) | 複層塗膜形成方法および複層塗膜 | |
JPS6055156A (ja) | 樹脂被覆防食鉄筋とその製造方法 | |
JP2009102543A (ja) | 硝化綿樹脂系塗料、その塗装方法および塗装物 | |
TWI722939B (zh) | 自黏型塗膜組成物、自黏型塗膜及其製造方法 | |
JP2007314633A (ja) | 常温硬化型塗料、その塗装方法および塗装物 | |
JP2005118621A (ja) | 屋外設置箱体の塗装処理方法 |
Legal Events
Date | Code | Title | Description |
---|---|---|---|
WWE | Wipo information: entry into national phase |
Ref document number: 201180028771.6 Country of ref document: CN |
|
121 | Ep: the epo has been informed by wipo that ep was designated in this application |
Ref document number: 11795451 Country of ref document: EP Kind code of ref document: A1 |
|
WWE | Wipo information: entry into national phase |
Ref document number: 13701949 Country of ref document: US |
|
WWE | Wipo information: entry into national phase |
Ref document number: 1201006524 Country of ref document: TH Ref document number: 1120111019874 Country of ref document: DE Ref document number: 112011101987 Country of ref document: DE |
|
WWE | Wipo information: entry into national phase |
Ref document number: 4044/KOLNP/2012 Country of ref document: IN |
|
122 | Ep: pct application non-entry in european phase |
Ref document number: 11795451 Country of ref document: EP Kind code of ref document: A1 |
|
REG | Reference to national code |
Ref country code: BR Ref legal event code: B01A Ref document number: 112012031819 Country of ref document: BR |
|
ENP | Entry into the national phase |
Ref document number: 112012031819 Country of ref document: BR Kind code of ref document: A2 Effective date: 20121213 |