CN102634833A - Method for composite surface treatment of aluminum alloy tire mold - Google Patents
Method for composite surface treatment of aluminum alloy tire mold Download PDFInfo
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- CN102634833A CN102634833A CN2012101322910A CN201210132291A CN102634833A CN 102634833 A CN102634833 A CN 102634833A CN 2012101322910 A CN2012101322910 A CN 2012101322910A CN 201210132291 A CN201210132291 A CN 201210132291A CN 102634833 A CN102634833 A CN 102634833A
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Abstract
The invention provides a method for composite surface treatment of an aluminum tire mold, which is characterized in that the method adopts the following steps: 1) alkaline electrolyte preparation, 2) micro-arc oxidation of the tire mold, and 3) hole sealing. Compared with the prior art, the method provided by the invention adopts micro-arc oxidation technology for oxidation treatment of the working cavity surface of the aluminum tire mold to form an aluminum oxide film layer with a double-layer ceramic structure. The hardness of the film layer can be up to 1100HV to 1800HV, even up to 3000HV, with a strong binding force with a matrix; a non-sticky coating cured at room temperature is adopted for hole sealing of the tire mold after micro-arc oxidation by dip-coating method. Under the premise of ensuring that the performance of the micro-arc oxidized film layer is not be affected, a thin non-sticky coating is formed on the mold surface through hole sealing, which can improve the smooth finish and antisticking property of the mold surface, and is helpful for releasing of the tire mold during use.
Description
Technical field
The present invention provides a kind of composite surface treatment method of duraluminum tire-mold, belongs to field of surface engineering technique.
Background technology
In recent years, along with the rapid emergence of automobile manufacture industry, the tire-mold production is faced with unprecedented opportunity to develop, and the aluminum tire-mold has also obtained using widely.But the surface property of single aluminum tire-mold does not reach the requirement of application such as hardness, wear resistance, antioxidant property.Therefore, often adopt process for modifying surface to improve the mechanical property and the work-ing life of aluminum tire-mold.
At present, aluminum tire-mold process for treating surface mainly contains other application rete of anodic oxidation, hard anodizing and some.Anodic oxidation for the aluminum tire-mold; Though form layer oxide film on the surface; This sull has improved the mechanical property of aluminum tire-mold to a certain extent, but prepared oxidation film layer is thinner, and is less with the bonding force of matrix; Surface hardness generally about 300HV, can only shield to the aluminum tire-mold in a short period of time; And the oxidation film layer of hard anodizing preparation has had certain raising than the hardness of common anode oxidation film layer, can reach 450HV, but its processing requirement is comparatively strict, and the temperature of general electrolytic solution must be controlled at below 5 ℃.No matter common anode oxidation or hard anodizing, used electrolytic solution is acid electrolyte, and environment is all had certain pollution hazard; Application coating to the aluminum tire-mold is generally the organic resin coating, and it needs higher solidification value, may cause the distortion of tire-mold, and this method is seldom used.
Summary of the invention
The object of the present invention is to provide a kind of defective that can overcome above-mentioned process method, when strengthening mould surface strength and resistance to corrosion, can reduce the sticking stickiness on surface, so that the composite surface treatment method of the duraluminum tire-mold that is convenient in demoulding.Its technical scheme is:
A kind of composite surface treatment method of duraluminum tire-mold is characterized in that adopting following steps: 1) preparation alkaline electrolyte, 2) tire-mold is carried out differential arc oxidation, 3) sealing of hole.
The composite surface treatment method of described duraluminum tire-mold, in the step 1), the pH value of alkaline electrolyte is 8～12; The concentration of electrolytic solution mesosilicic acid sodium is 6g/L～10g/L, and the concentration of Sodium hexametaphosphate 99 is 25g/L～35g/L, and concentration sodium hydroxide is 0.8g/L～1.5g/L; The concentration of sodium wolframate is 6g/L～10g/L; The concentration of Lanthanum trinitrate is 0.5g/L～0.6g/L, and the concentration of hydrogen peroxide is 0.4g/L～1g/L, and all the other are deionized water.
The composite surface treatment method of described duraluminum tire-mold; Step 2) in; Earlier do not need the treating part to cover with high pressure resistant adhesive tape the duraluminum tire-mold, be immersed in then in the alkaline electrolyte of step 1) preparation, electrolyte temperature is controlled at 30～45 ℃ scope; Mould is made anode, and stainless steel is made negative electrode, applies voltage, and voltage peak is up to 500～600V, and current density is 5A/dm
2～15A/dm
2, pulse-repetition is 500HZ～1000HZ, dutycycle 8%～20%, and the treatment time is 45～60min, promptly generates the ceramic membrane that a layer thickness is 20～30 μ m on duraluminum tire-mold surface.
The composite surface treatment method of described duraluminum tire-mold, in the step 3), the components by weight percent of the used coating of sealing of hole is: 100 parts of urethane resins; 22～49 parts of the compounds of polyethylene wax and tetrafluoroethylene; 132～175 parts in acetone, 60～90 parts of YLENE, 35～48 parts of ring ethyl ketones; 5～20 parts of auxiliary agents, wherein any composition of one or both in auxiliary agent employing Antimony Trioxide: 99.5Min, trimeric cyanamide, the trimeric cyanamide ester complex compound; Sealing of hole adopts dipping-pulling method, and the tire-mold behind the differential arc oxidation is immersed in the above-mentioned coating, evenly lifts taking-up behind dipping 30s～75s, dries.
The present invention compared with prior art, its advantage is:
1, adopt differential arc oxidization technique that aluminum tire-mold work cavity surface is carried out oxide treatment; Form the alchlor rete that one deck has double-deck type ceramic structure: outer is tectorium; Have more hole and tiny crack, internal layer is a tight zone, and this film hardness can be up to 1100HV～1800HV; Even reach 3000HV, simultaneously big with basal body binding force;
2, the used coating of sealing of hole adopts the ambient cure non-viscous paint; Carry out sealing of hole through the tire-mold of dipping-pulling method after to differential arc oxidation; Guaranteeing under the impregnable prerequisite of differential arc oxidation film layer performance; Form the very thin not viscous coating of one deck on the surface through sealing of hole, improved the smooth finish and the anti-adhesion performance of die surface, help tire-mold and carry out the demoulding in use.
Description of drawings
Fig. 1 is the surface topography map behind the embodiment of the invention differential arc oxidation;
Fig. 2 is the surface topography map behind the embodiment of the invention sealing of hole.
The practical implementation method
Below in conjunction with embodiment to further explain of the present invention.
Embodiment 1:
The preparation alkaline electrolyte: the pH value of alkaline electrolyte is 8; The concentration of electrolytic solution mesosilicic acid sodium is 6g/L, and the concentration of Sodium hexametaphosphate 99 is 25g/L, and concentration sodium hydroxide is 0.8g/L; The concentration of sodium wolframate is 6g/L; The concentration of Lanthanum trinitrate is 0.5g/L, and the concentration of hydrogen peroxide is 0.4g/L, and all the other are deionized water.
Tire-mold is carried out differential arc oxidation: do not need the treating part to cover with high pressure resistant adhesive tape the duraluminum tire-mold earlier, be immersed in then in the above-mentioned alkaline electrolyte, electrolyte temperature is controlled at 30 ℃; Mould is made anode, and stainless steel is made negative electrode, applies voltage, and voltage peak is up to 500～600V, and current density is 5A/dm
2, pulse-repetition is 500HZ, dutycycle 8%, and the treatment time is 45min, promptly generates a layer thickness uniform ceramic on duraluminum tire-mold surface.The one-tenth-value thickness 1/10 that gets five different positionss with TT260 coating thickness detector side is respectively 20.4 μ m, 21.2 μ m, 21.5 μ m, 20.7 μ m, 20.3 μ m, and mean thickness is 20.82 μ m.Record hardness between 750～1000HV with microhardness tester, average hardness is 850HV.
Sealing of hole: the components by weight percent of the used coating of sealing of hole is 100 parts of urethane resins, 22 parts of the compounds of polyethylene wax and tetrafluoroethylene, 132 parts in acetone, 60 parts of YLENE, 35 parts of ring ethyl ketones, 5 parts of Antimony Trioxide: 99.5Mins; Sealing of hole adopts dipping-pulling method, and the tire-mold behind the differential arc oxidation is immersed in the above-mentioned coating, evenly lifts taking-up behind the dipping 30s, dries.The cohesive force that adopts adhesive tape stretching method side to get five different positionss is respectively: 3.75N/cm
2, 4N/cm
2, 4N/cm
2, 4.25N/cm
2, 3.75N/cm
2, average out to 3.85N/cm
2, the 5%NaCl salt-fog test did not have corrosion phenomenon more than 500 hours.
Embodiment 2:
The preparation alkaline electrolyte: the pH value of alkaline electrolyte is 10; The concentration of electrolytic solution mesosilicic acid sodium is 8g/L, and the concentration of Sodium hexametaphosphate 99 is 30g/L, and concentration sodium hydroxide is 1.2g/L; The concentration of sodium wolframate is 8g/L; The concentration of Lanthanum trinitrate is 0.5g/L, and the concentration of hydrogen peroxide is 0.7g/L, and all the other are deionized water.
Tire-mold is carried out differential arc oxidation: do not need the treating part to cover with high pressure resistant adhesive tape the duraluminum tire-mold earlier, be immersed in then in the above-mentioned alkaline electrolyte, electrolyte temperature is controlled at 40 ℃; Mould is made anode, and stainless steel is made negative electrode, applies voltage, and voltage peak is up to 500～600V, and current density is 10A/dm
2, pulse-repetition is 750HZ, dutycycle 12%, and the treatment time is 50min, promptly generates a layer thickness uniform ceramic on duraluminum tire-mold surface.The one-tenth-value thickness 1/10 that gets five different positionss with TT260 coating thickness detector side is respectively 24 μ m, 27 μ m, 25 μ m, 23.9 μ m, 25.6 μ m, and mean thickness is 25.1 μ m.Record hardness between 980～1200HV with microhardness tester, average hardness is 1072HV.
Sealing of hole: the components by weight percent of the used coating of sealing of hole is 100 parts of urethane resins, 35 parts of the compounds of polyethylene wax and tetrafluoroethylene, 155 parts in acetone, 75 parts of YLENE, 42 parts of ring ethyl ketones, 15 parts of trimeric cyanamides; Sealing of hole adopts dipping-pulling method, and the tire-mold behind the differential arc oxidation is immersed in the above-mentioned coating, evenly lifts taking-up behind the dipping 50s, dries.The cohesive force that adopts adhesive tape stretching method side to get five different positionss is respectively: 4.25N/cm
2, 4N/cm
2, 4.5N/cm
2, 4.25N/cm
2, 4.5N/cm
2, average out to 4.3N/cm
2, the 5%NaCl salt-fog test did not have corrosion phenomenon more than 500 hours.
Embodiment 3:
The preparation alkaline electrolyte: the pH value of alkaline electrolyte is 12; The concentration of electrolytic solution mesosilicic acid sodium is 10g/L, and the concentration of Sodium hexametaphosphate 99 is 35g/L, and concentration sodium hydroxide is 1.5g/L; The concentration of sodium wolframate is 10g/L; The concentration of Lanthanum trinitrate is 0.6g/L, and the concentration of hydrogen peroxide is 1g/L, and all the other are deionized water.
Tire-mold is carried out differential arc oxidation: do not need the treating part to cover with high pressure resistant adhesive tape the duraluminum tire-mold earlier, be immersed in then in the above-mentioned alkaline electrolyte, electrolyte temperature is controlled at 45 ℃; Mould is made anode, and stainless steel is made negative electrode, applies voltage, and voltage peak is up to 500～600V, and current density is 15A/dm
2, pulse-repetition is 1000HZ, dutycycle 20%, and the treatment time is 60min, promptly generates a layer thickness uniform ceramic on duraluminum tire-mold surface.The one-tenth-value thickness 1/10 that gets five different positionss with TT260 coating thickness detector side is respectively 30 μ m, 32 μ m, 33 μ m, 29 μ m, 32 μ m, and mean thickness is 31.2 μ m.Record hardness between 860～1300HV with microhardness tester, average hardness is 1125HV.
Sealing of hole: the components by weight percent of the used coating of sealing of hole is 100 parts of urethane resins, 49 parts of the compounds of polyethylene wax and tetrafluoroethylene, 175 parts in acetone, 90 parts of YLENE, 48 parts of ring ethyl ketones, 5 parts of trimeric cyanamides, 15 parts of trimeric cyanamide ester complex compounds; Sealing of hole adopts dipping-pulling method, and the tire-mold behind the differential arc oxidation is immersed in the above-mentioned coating, evenly lifts taking-up behind the dipping 75s, dries.The cohesive force that adopts adhesive tape stretching method side to get five different positionss is respectively: 4.5N/cm
2, 4.75N/cm
2, 4.5N/cm
2, 4.75N/cm
2, 5N/cm
2, average out to 4.7N/cm
2, the 5%NaCl salt-fog test did not have corrosion phenomenon more than 500 hours.
Claims (4)
1. the composite surface treatment method of a duraluminum tire-mold is characterized in that adopting following steps: 1) preparation alkaline electrolyte, 2) tire-mold is carried out differential arc oxidation, 3) sealing of hole.
2. the composite surface treatment method of duraluminum tire-mold as claimed in claim 1 is characterized in that: in the step 1), the pH value of alkaline electrolyte is 8～12; The concentration of electrolytic solution mesosilicic acid sodium is 6g/L～10g/L, and the concentration of Sodium hexametaphosphate 99 is 25g/L～35g/L, and concentration sodium hydroxide is 0.8g/L～1.5g/L; The concentration of sodium wolframate is 6g/L～10g/L; The concentration of Lanthanum trinitrate is 0.5g/L～0.6g/L, and the concentration of hydrogen peroxide is 0.4g/L～1g/L, and all the other are deionized water.
3. the composite surface treatment method of duraluminum tire-mold as claimed in claim 1; It is characterized in that: step 2) in; Earlier do not need the treating part to cover the duraluminum tire-mold with high pressure resistant adhesive tape; Be immersed in then in the alkaline electrolyte of step 1) preparation, electrolyte temperature is controlled at 30～45 ℃ scope; Mould is made anode, and stainless steel is made negative electrode, applies voltage, and voltage peak is up to 500～600V, and current density is 5A/dm
2～15A/dm
2, pulse-repetition is 500HZ～1000HZ, dutycycle 8%～20%, and the treatment time is 45～60min, promptly generates the ceramic membrane that a layer thickness is 20～30 μ m on duraluminum tire-mold surface.
4. the composite surface treatment method of duraluminum tire-mold as claimed in claim 1 is characterized in that: in the step 3), the components by weight percent of the used coating of sealing of hole is: 100 parts of urethane resins; 22～49 parts of the compounds of polyethylene wax and tetrafluoroethylene; 132～175 parts in acetone, 60～90 parts of YLENE, 35～48 parts of ring ethyl ketones; 5～20 parts of auxiliary agents, wherein any composition of one or both in auxiliary agent employing Antimony Trioxide: 99.5Min, trimeric cyanamide, the trimeric cyanamide ester complex compound; Sealing of hole adopts dipping-pulling method, and the tire-mold behind the differential arc oxidation is immersed in the above-mentioned coating, evenly lifts taking-up behind dipping 30s～75s, dries.
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Cited By (13)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102925948A (en) * | 2012-10-15 | 2013-02-13 | 祁阳宏泰铝业有限公司 | Imitated stainless steel aluminum surface treatment technology |
| CN103014805A (en) * | 2012-12-21 | 2013-04-03 | 哈尔滨工业大学 | Preparation method of tough alumina ceramic membrane |
| CN104630864A (en) * | 2014-11-21 | 2015-05-20 | 沈阳工业大学 | Hole-sealing method for magnesium alloy micro-arc oxidation coating |
| CN105369317A (en) * | 2015-12-10 | 2016-03-02 | 苏州市嘉明机械制造有限公司 | Preparation technology of insulating thrust runner collar with long service life |
| CN105839163A (en) * | 2016-05-24 | 2016-08-10 | 江苏理工学院 | Electrolyte applied to laser coupling microplasma arc oxidation of 7075 aluminum alloys |
| CN105908237A (en) * | 2016-04-20 | 2016-08-31 | 深圳市龙岗区骨科医院 | Medical implant and preparation method of same |
| CN106119926A (en) * | 2016-09-06 | 2016-11-16 | 嘉瑞科技（惠州）有限公司 | A kind of ceramic coating formed by micro-arc oxidation and preparation method thereof |
| CN106567116A (en) * | 2016-11-10 | 2017-04-19 | 长沙淮石新材料科技有限公司 | Heat-resisting moisture-preserving aluminum alloy and preparation method and application thereof |
| CN106637345A (en) * | 2016-12-30 | 2017-05-10 | 华东理工大学 | Preparation method of polymer hole-sealing agent for aluminum alloy anodic oxidation |
| CN106995931A (en) * | 2017-04-13 | 2017-08-01 | 大连海事大学 | The preparation method of aluminum alloy differential arc oxidation composite ceramic layer |
| CN107313096A (en) * | 2017-08-15 | 2017-11-03 | 肥西县通力机械有限公司 | A kind of drawing mould process of surface treatment |
| CN108360035A (en) * | 2018-02-07 | 2018-08-03 | 永发（河南）模塑科技发展有限公司 | A kind of aluminum alloy material paper pulp formation mould Anodic oxidation treatment technology for surface |
| CN109208052A (en) * | 2018-09-25 | 2019-01-15 | 山东理工大学 | A kind of process of surface treatment of differential arc oxidation aluminum alloy gear |
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Cited By (16)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102925948B (en) * | 2012-10-15 | 2014-12-17 | 祁阳宏泰铝业有限公司 | Imitated stainless steel aluminum surface treatment technology |
| CN102925948A (en) * | 2012-10-15 | 2013-02-13 | 祁阳宏泰铝业有限公司 | Imitated stainless steel aluminum surface treatment technology |
| CN103014805A (en) * | 2012-12-21 | 2013-04-03 | 哈尔滨工业大学 | Preparation method of tough alumina ceramic membrane |
| CN104630864A (en) * | 2014-11-21 | 2015-05-20 | 沈阳工业大学 | Hole-sealing method for magnesium alloy micro-arc oxidation coating |
| CN105369317A (en) * | 2015-12-10 | 2016-03-02 | 苏州市嘉明机械制造有限公司 | Preparation technology of insulating thrust runner collar with long service life |
| CN105908237A (en) * | 2016-04-20 | 2016-08-31 | 深圳市龙岗区骨科医院 | Medical implant and preparation method of same |
| CN105839163B (en) * | 2016-05-24 | 2018-06-08 | 江苏理工学院 | For the electrolyte of 7075 aluminium alloy laser coupled microplasma arcs oxidation |
| CN105839163A (en) * | 2016-05-24 | 2016-08-10 | 江苏理工学院 | Electrolyte applied to laser coupling microplasma arc oxidation of 7075 aluminum alloys |
| CN106119926A (en) * | 2016-09-06 | 2016-11-16 | 嘉瑞科技（惠州）有限公司 | A kind of ceramic coating formed by micro-arc oxidation and preparation method thereof |
| CN106567116A (en) * | 2016-11-10 | 2017-04-19 | 长沙淮石新材料科技有限公司 | Heat-resisting moisture-preserving aluminum alloy and preparation method and application thereof |
| CN106567116B (en) * | 2016-11-10 | 2018-10-09 | 长沙淮石新材料科技有限公司 | A kind of heat-resisting moisturizing aluminium alloy and its preparation method and application |
| CN106637345A (en) * | 2016-12-30 | 2017-05-10 | 华东理工大学 | Preparation method of polymer hole-sealing agent for aluminum alloy anodic oxidation |
| CN106995931A (en) * | 2017-04-13 | 2017-08-01 | 大连海事大学 | The preparation method of aluminum alloy differential arc oxidation composite ceramic layer |
| CN107313096A (en) * | 2017-08-15 | 2017-11-03 | 肥西县通力机械有限公司 | A kind of drawing mould process of surface treatment |
| CN108360035A (en) * | 2018-02-07 | 2018-08-03 | 永发（河南）模塑科技发展有限公司 | A kind of aluminum alloy material paper pulp formation mould Anodic oxidation treatment technology for surface |
| CN109208052A (en) * | 2018-09-25 | 2019-01-15 | 山东理工大学 | A kind of process of surface treatment of differential arc oxidation aluminum alloy gear |
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Application publication date: 20120815 |