CN104292767B - Vacuum casting mold material used for electrical insulation parts, and preparation method of mold - Google Patents
Vacuum casting mold material used for electrical insulation parts, and preparation method of mold Download PDFInfo
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- CN104292767B CN104292767B CN201410015608.1A CN201410015608A CN104292767B CN 104292767 B CN104292767 B CN 104292767B CN 201410015608 A CN201410015608 A CN 201410015608A CN 104292767 B CN104292767 B CN 104292767B
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- 239000000463 material Substances 0.000 title claims abstract description 28
- 238000002360 preparation method Methods 0.000 title abstract description 14
- 238000005266 casting Methods 0.000 title abstract description 4
- 238000010292 electrical insulation Methods 0.000 title abstract 3
- 239000000843 powder Substances 0.000 claims abstract description 37
- 239000003822 epoxy resin Substances 0.000 claims abstract description 25
- 238000000034 method Methods 0.000 claims abstract description 25
- 229920000647 polyepoxide Polymers 0.000 claims abstract description 25
- 229910052782 aluminium Inorganic materials 0.000 claims abstract description 23
- 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 claims abstract description 23
- 239000004411 aluminium Substances 0.000 claims abstract description 19
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 claims abstract description 19
- PNEYBMLMFCGWSK-UHFFFAOYSA-N aluminium oxide Inorganic materials [O-2].[O-2].[O-2].[Al+3].[Al+3] PNEYBMLMFCGWSK-UHFFFAOYSA-N 0.000 claims abstract description 18
- 239000003795 chemical substances by application Substances 0.000 claims abstract description 15
- 229940106691 bisphenol a Drugs 0.000 claims abstract description 11
- 239000002994 raw material Substances 0.000 claims abstract description 9
- 150000008064 anhydrides Chemical class 0.000 claims abstract 2
- 238000009413 insulation Methods 0.000 claims description 24
- 239000002245 particle Substances 0.000 claims description 10
- MWSKJDNQKGCKPA-UHFFFAOYSA-N 6-methyl-3a,4,5,7a-tetrahydro-2-benzofuran-1,3-dione Chemical group C1CC(C)=CC2C(=O)OC(=O)C12 MWSKJDNQKGCKPA-UHFFFAOYSA-N 0.000 claims description 7
- BLRPTPMANUNPDV-UHFFFAOYSA-N Silane Chemical compound [SiH4] BLRPTPMANUNPDV-UHFFFAOYSA-N 0.000 claims description 6
- 229910000077 silane Inorganic materials 0.000 claims description 6
- 150000008065 acid anhydrides Chemical class 0.000 claims description 5
- 230000009477 glass transition Effects 0.000 claims description 5
- 238000003756 stirring Methods 0.000 claims description 5
- VYKXQOYUCMREIS-UHFFFAOYSA-N methylhexahydrophthalic anhydride Chemical compound C1CCCC2C(=O)OC(=O)C21C VYKXQOYUCMREIS-UHFFFAOYSA-N 0.000 claims description 2
- ZYUVGYBAPZYKSA-UHFFFAOYSA-N 5-(3-hydroxybutan-2-yl)-4-methylbenzene-1,3-diol Chemical compound CC(O)C(C)C1=CC(O)=CC(O)=C1C ZYUVGYBAPZYKSA-UHFFFAOYSA-N 0.000 claims 1
- NHADDZMCASKINP-HTRCEHHLSA-N decarboxydihydrocitrinin Natural products C1=C(O)C(C)=C2[C@H](C)[C@@H](C)OCC2=C1O NHADDZMCASKINP-HTRCEHHLSA-N 0.000 claims 1
- 238000010438 heat treatment Methods 0.000 claims 1
- 238000004519 manufacturing process Methods 0.000 abstract description 14
- 238000005516 engineering process Methods 0.000 abstract description 8
- 238000010125 resin casting Methods 0.000 abstract description 3
- 229910052751 metal Inorganic materials 0.000 abstract description 2
- 239000002184 metal Substances 0.000 abstract description 2
- 230000006835 compression Effects 0.000 abstract 1
- 238000007906 compression Methods 0.000 abstract 1
- 238000003672 processing method Methods 0.000 abstract 1
- 239000011248 coating agent Substances 0.000 description 3
- 238000000576 coating method Methods 0.000 description 3
- 238000013036 cure process Methods 0.000 description 3
- 238000007872 degassing Methods 0.000 description 3
- 229910000831 Steel Inorganic materials 0.000 description 2
- 238000000465 moulding Methods 0.000 description 2
- 239000010959 steel Substances 0.000 description 2
- 229930185605 Bisphenol Natural products 0.000 description 1
- 238000010923 batch production Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- MUTGBJKUEZFXGO-UHFFFAOYSA-N hexahydrophthalic anhydride Chemical compound C1CCCC2C(=O)OC(=O)C21 MUTGBJKUEZFXGO-UHFFFAOYSA-N 0.000 description 1
- 238000009776 industrial production Methods 0.000 description 1
- 239000007769 metal material Substances 0.000 description 1
- 150000002739 metals Chemical class 0.000 description 1
- 239000004033 plastic Substances 0.000 description 1
- 229920005989 resin Polymers 0.000 description 1
- 239000011347 resin Substances 0.000 description 1
- 238000007493 shaping process Methods 0.000 description 1
- 230000035939 shock Effects 0.000 description 1
- 238000007711 solidification Methods 0.000 description 1
- 230000008023 solidification Effects 0.000 description 1
Abstract
The invention discloses a vacuum casting mold material used for electrical insulation parts, and a preparation method of a mold, and belongs to the technical field of electrical manufacturing and power equipment. The mold material is mainly composed of the following raw materials by weight: 95-110 parts of bisphenol-A type epoxy resin, 25-35 parts of an anhydride curing agent, 110-130 parts of metal aluminium powder and 60-80 parts of alumina powder. According to the invention, an epoxy resin casting material is adopted; a conventional casting technology and a rapid forming technology are combined; the time required by the method is about 1/3 of a conventional mold processing method; and the method has the characteristics of short mold preparation period, low cost, high precision and long service life. Besides, the mold has light weight, can be repaired easily, can meet production and use requirements well, can reduce labor intensity significantly and has significant economic benefits. Thermal conductivity, and mechanical and technological performances of the mold can meet requirements for a manufacturing process of the electrical insulation parts; heat conductivity coefficient of the mold is 2.5-5.4 W.m＜-1＞K＜-1＞; a tensile strength is 75-105 MPa; and a compression strength is 180-220 MPa.
Description
Technical field
Present invention relates particularly to a kind of electric insulation part vacuum pouring mold materials, and the preparation method of this mould,
Belong to Electric Manufacture and electrical equipment technical field.
Background technology
Gradually develop to the direction of multi items, small lot, high-quality, low cost with industrial production, people start requirement
To mould（Manufacture the critical process equipment of various products）Construction cycle Manufacturing cost be controlled.Poured with epoxy resin mould
Tool presses different structures and purpose classification, such as switch cubicle insulated product, because its size is little, batch production when same class product
Number of molds demand many, and required precision is less high, can shorten the moulding cycle using epoxy resin casting mold, repeatability
Mould can with mass production, and epoxy resin casting mold use raw material for traditional moulds material weight
Gently it is easy to repair, and low price, labor strength can be significantly reduced.
At present, epoxide resin vacuum casting mold technology is in auto manufacturing, toy manufacturing industry, household appliances manufacturing, five metals
The industrial system such as industry and plastic products is commonly used.With new material, the development of new technology and epoxy resin application technology
Promote, the combination property of epoxy resin mould and manufacturing technology is widely understood and understanding, epoxide resin material performance in addition
Raising and the simplification of resin die manufacture craft and technique for applying, epoxy resin mould has obtained rapid development, has become new
High efficiency, inexpensive advanced mould.However, in mesolow insulated product industry, the domestic application example still not having such mould.
Content of the invention
It is an object of the invention to provide a kind of electric insulation part vacuum pouring mold materials.
Meanwhile, the present invention also provides a kind of preparation method of electric insulation part vacuum pouring mould.
In order to realize object above, the technical solution adopted in the present invention is：
A kind of electric insulation part vacuum pouring mold materials, are mainly made up of the raw material of following parts by weight：Bisphenol A-type
95～110 parts of epoxy resin, 25～35 parts of acid anhydride type curing agent, 110～130 parts of metallic aluminium powder, 60～80 parts of alumina powder.
Specifically, a kind of electric insulation part vacuum pouring mold materials, can also include the raw material of following parts by weight：
1～2 part of mill base.
Viscosity at 25 DEG C for the described bisphenol A type epoxy resin is 4000～7000mPas, and glass transition temperature is
130～140 DEG C.
Viscosity at 25 DEG C for the described acid anhydride type curing agent is 1000～3000mPas；Preferably methyl tetrahydro phthalic anhydride or first
Base HHPA.
Described metallic aluminium powder through silane treatment, its particle diameter be 1.5～5 microns, purchased from ocean Aluminum Co., Ltd, be through
Aluminium powder finished product after silane treatment.
The particle diameter of described alumina powder is 300～350 mesh.
Described mill base be commercial goods, can according to color it needs to be determined that.
A kind of electric insulation part preparation method of vacuum pouring mould, comprises the following steps：
（1）First alumina powder is preheated 4～6h at 90～120 DEG C, be cooled to 30～50 DEG C standby；
（2）Take bisphenol A type epoxy resin, metallic aluminium powder, acid anhydride type curing agent and alumina powder, stir at 55～70 DEG C
Be evacuated to vacuum be down to below 150Pa castable；
（3）The mold cavity surface of vacuum pouring mould coat releasing agent, and be preheated to 70～90 DEG C standby；
（4）To step（3）Mould carry out vacuumizing process, be down to below 150Pa to vacuum, take step（2）Pour
Material feeding is noted to the 1/2～3/4 of mold cavity volume, and poring rate is 8～10kg/min, stops material feeding 5～10min, followed by
Continue and fill, be poured, keep vacuumizing state 10～15min；
（5）To step（4）Vacuum pouring mould carry out solidify afterwards process, successively at 80～90 DEG C heat 2h, 90～
Heat 2h at 110 DEG C, at 110～120 DEG C, heat 2h, heat 12h at 120～135 DEG C, then be cooled to room temperature with furnace temperature.
Described step（3）In except mould preheating outer, the vacuum pouring tank of splendid attire mould also needs to be preheated to 70～80 DEG C.
Beneficial effects of the present invention：
In the present invention, electric insulation part adopts poured with epoxy resin material with vacuum pouring mould, by traditional mold making technology
Combine with rapid shaping technique, substitute traditional metal material（45# steel or Q235 steel）, required time is traditional moulds processing
The 1/3 about of method, have that the moulding cycle is short, low cost, high precision, life-span length the features such as, and mold weight is light, be easy to repair
Mend, can preferably meet production and application requirement（I.e. vacuum pouring method manufacture requirements）, labor strength can be significantly reduced, comprehensive warp
Ji remarkable benefit.
In the present invention, the heat conductivility of vacuum pouring mould, mechanical performance, processing performance all can meet electric insulation part system
Make the requirement to mould for the process, its thermal conductivity factor is 2.5～5.4W m-1K-1, tensile strength is 75～105MPa, compressive strength
For 180～220MPa.The heat conduction of material after adding metallic aluminium powder in poured with epoxy resin material to significantly improve solidification
Performance and shock resistance, the thermal conductivity factor of its epoxy resin is only 0.2W m-1K-1, can be by mould by adding metallic aluminium powder
The thermal conductivity factor of tool improves to 2.5～5.4W m-1K-1.
In the present invention, electric insulation part mould adopts vacuum pouring method to prepare, and its method is simple, simple operation, is suitable to advise
Modelling produces and applies.Shrinkage factor using the electric insulation part vacuum pouring mould of the method preparation is only 0.05%, wear-resisting
Performance is good, and dimensional stability is high.
Specific embodiment
Following embodiments are only described in further detail to the present invention, but do not constitute any limitation of the invention.
Embodiment 1
In the present embodiment, electric insulation part vacuum pouring mold materials, are made up of the raw material of following parts by weight：Bisphenol-A
100 parts of type epoxy resin, the viscosity at 25 DEG C is 6500mPas, and glass transition temperature is 135 DEG C；Methyl tetrahydro phthalic anhydride 30
Part, the viscosity at 25 DEG C is 2900mPas；120 parts of metallic aluminium powder, its particle diameter is 4 microns, purchased from ocean Aluminum Co., Ltd, is
Aluminium powder finished product after silane treatment；80 parts of alumina powder, particle diameter is 320 mesh；2 parts of black color paste.
In the present embodiment, the electric insulation part preparation method of vacuum pouring mould, comprises the following steps：
（1）Preparation castable：
First alumina powder is preheated 5h at 110 DEG C, then with furnace temperature be cooled to 45 DEG C standby；Take bisphenol A type epoxy resin,
Metallic aluminium powder, methyl tetrahydro phthalic anhydride, alumina powder and mill base, stirring at 60 DEG C is evacuated to vacuum and is down to below 150Pa
Obtain castable（Castable degassing is critically important, can not reduce the vacuum outgas time for pursuing speed）, viscosity is 8500mPas, body
Be temperature be 72 DEG C；
（2）Pouring can and mould prepare：
Electric insulation part vacuum pouring mould is made up of six pieces of templates, is fastened by stay bolt, one group six sets of its mould, first
Coat releasing agent, uniform application 3 times on mold cavity surface, once and secondary terminals FX not coating release agent, and preheat
Standby to 70 DEG C, pouring can be preheated to 75 DEG C standby；
（3）Vacuum pouring process：
To step（2）Pouring can and mould carry out vacuumizing process, be down to below 150Pa to vacuum, take step（1）
Castable note to the 2/3 of first set mold cavity volume, poring rate is 8kg/min, stops material feeding, then pours into a mould remaining
Five molds, after cast one wheel（About 8min）, it is further continued for filling the first mold, in order to be vented, six molds are poured,
Keep vacuumizing state 12min；
（4）Post cure processes：
To step（3）Vacuum pouring mould carry out solidify afterwards process, successively at 85 DEG C heat 2h, at 110 DEG C heat
2h, heats 2h at 115 DEG C, heats 12h, then be cooled to room temperature with furnace temperature at 130 DEG C；
（5）Six sets of part assemblings：
Six pieces of moulds of vacuum pouring mould are taken out in die sinking, are assembled into a set of vacuum pouring mould with stay bolt.
Vacuum pouring mould manufactured in the present embodiment, its thermal conductivity factor is 2.883W m after tested-1K-1, tensile strength is
81.6MPa, compressive strength is 190.3MPa.
Embodiment 2
In the present embodiment, electric insulation part vacuum pouring mold materials, are made up of the raw material of following parts by weight：Bisphenol-A
95 parts of type epoxy resin, the viscosity at 25 DEG C is 5800mPas, and glass transition temperature is 132 DEG C；25 parts of methyl tetrahydro phthalic anhydride,
Viscosity at 25 DEG C is 2700mPas；110 parts of metallic aluminium powder, its particle diameter be 4 microns, purchased from ocean Aluminum Co., Ltd, be through
Aluminium powder finished product after silane treatment；60 parts of alumina powder, particle diameter is 320 mesh；2 parts of black color paste.
In the present embodiment, the electric insulation part preparation method of vacuum pouring mould, comprises the following steps：
（1）Preparation castable：
First alumina powder is preheated 5h at 100 DEG C, then with furnace temperature be cooled to 40 DEG C standby；Take bisphenol A type epoxy resin,
Metallic aluminium powder, methyl tetrahydro phthalic anhydride, alumina powder and mill base, stirring at 55 DEG C is evacuated to vacuum and is down to below 150Pa
Obtain castable（Castable degassing is critically important, can not reduce the vacuum outgas time for pursuing speed）, viscosity is 8200mPas, body
Be temperature be 69 DEG C；
（2）Pouring can and mould prepare：
Electric insulation part vacuum pouring mould is made up of six pieces of templates, is fastened by stay bolt, one group six sets of its mould, first
Coat releasing agent, uniform application 3 times on mold cavity surface, once and secondary terminals FX not coating release agent, and preheat
Standby to 75 DEG C, pouring can be preheated to 80 DEG C standby；
（3）Vacuum pouring process：
To step（2）Pouring can and mould carry out vacuumizing process, be down to below 150Pa to vacuum, take step（1）
Castable note to the 2/3 of first set mold cavity volume, poring rate is 9kg/min, stops material feeding, then pours into a mould remaining
Five molds, after cast one wheel（About 7min）, it is further continued for filling the first mold, in order to be vented, six molds are poured,
Keep vacuumizing state 10min；
（4）Post cure processes：
To step（3）Vacuum pouring mould carry out solidify afterwards process, successively at 85 DEG C heat 2h, at 100 DEG C heat
2h, heats 2h at 110 DEG C, heats 12h, then be cooled to room temperature with furnace temperature at 125 DEG C；
（5）Six sets of part assemblings：
Six pieces of moulds of vacuum pouring mould are taken out in die sinking, are assembled into a set of vacuum pouring mould with stay bolt.
Vacuum pouring mould manufactured in the present embodiment, its thermal conductivity factor is 2.703W m after tested-1K-1, tensile strength is
87.3MPa, compressive strength is 210.7MPa.
Embodiment 3
In the present embodiment, electric insulation part vacuum pouring mold materials, are made up of the raw material of following parts by weight：Bisphenol-A
110 parts of type epoxy resin, the viscosity at 25 DEG C is 6800mPas, and glass transition temperature is 136 DEG C；Methyl hexahydrophthalic anhydride 35
Part, the viscosity at 25 DEG C is 2500mPas；130 parts of metallic aluminium powder, its particle diameter is 4 microns, purchased from ocean Aluminum Co., Ltd, is
Aluminium powder finished product after silane treatment；80 parts of alumina powder, particle diameter is 320 mesh；2 parts of black color paste.
In the present embodiment, the electric insulation part preparation method of vacuum pouring mould, comprises the following steps：
（1）Preparation castable：
First alumina powder is preheated 5h at 120 DEG C, then with furnace temperature be cooled to 50 DEG C standby；Take bisphenol A type epoxy resin,
Metallic aluminium powder, methyl tetrahydro phthalic anhydride, alumina powder and mill base, stirring at 65 DEG C is evacuated to vacuum and is down to below 150Pa
Obtain castable（Castable degassing is critically important, can not reduce the vacuum outgas time for pursuing speed）, viscosity is 8500mPas, body
Be temperature be 72 DEG C；
（2）Pouring can and mould prepare：
Electric insulation part vacuum pouring mould is made up of six pieces of templates, is fastened by stay bolt, one group six sets of its mould, first
Coat releasing agent, uniform application 3 times on mold cavity surface, once and secondary terminals FX not coating release agent, and preheat
Standby to 80 DEG C, pouring can be preheated to 85 DEG C standby；
（3）Vacuum pouring process：
To step（2）Pouring can and mould carry out vacuumizing process, be down to below 150Pa to vacuum, take step（1）
Castable note to the 2/3 of first set mold cavity volume, poring rate is 10kg/min, stops material feeding, then pours into a mould surplus
Remaining five molds, after cast one wheel（About 6min）, it is further continued for filling the first mold, in order to be vented, six molds pour
Finish, keep vacuumizing state 15min；
（4）Post cure processes：
To step（3）Vacuum pouring mould carry out solidify afterwards process, successively at 90 DEG C heat 2h, at 120 DEG C heat
4h, heats 12h at 135 DEG C, then is cooled to room temperature with furnace temperature；
（5）Six sets of part assemblings：
Six pieces of moulds of vacuum pouring mould are taken out in die sinking, are assembled into a set of vacuum pouring mould with stay bolt.
Vacuum pouring mould manufactured in the present embodiment, its thermal conductivity factor is 3.230W m after tested-1K-1, tensile strength is
94.9MPa, compressive strength is 180.2MPa.
Claims (4)
1. a kind of electric insulation part with vacuum pouring mold materials it is characterised in that：It is made up of the raw material of following parts by weight：Double
95～110 parts of phenol A type epoxy resin, 25～35 parts of acid anhydride type curing agent, 110～130 parts of metallic aluminium powder, alumina powder 60
～80 parts；Also include the raw material of following parts by weight：1～2 part of mill base；Described metallic aluminium powder through silane treatment, its particle diameter
For 1.5～5 microns；The particle diameter of described alumina powder is 300～350 mesh.
2. electric insulation part according to claim 1 with vacuum pouring mold materials it is characterised in that：Described bisphenol-A
Viscosity at 25 DEG C for the type epoxy resin is 4000～7000mPa s, and glass transition temperature is 130～140 DEG C.
3. electric insulation part according to claim 1 with vacuum pouring mold materials it is characterised in that：Described anhydrides
Curing agent is methyl tetrahydro phthalic anhydride or methyl hexahydrophthalic anhydride.
4. a kind of method preparing electric insulation part vacuum pouring mould using mold materials as claimed in claim 1, its
It is characterised by：Comprise the following steps：
（1）First alumina powder is preheated 4～6h at 90～120 DEG C, be cooled to 30～50 DEG C standby；
（2）Take bisphenol-A type epoxy resin, metallic aluminium powder, acid anhydride type curing agent, alumina powder and mill base, stir at 55～70 DEG C
Mix be evacuated to vacuum be down to below 150Pa castable；
（3）The mold cavity surface of vacuum pouring mould coat releasing agent, and be preheated to 70～90 DEG C standby；
（4）To step（3）Mould carry out vacuumizing process, be down to below 150Pa to vacuum, take step（2）Castable
Note to the 1/2～3/4 of mold cavity volume, poring rate is 8～10kg/min, stops material feeding 5～10min,
It is further continued for filling, is poured, keep vacuumizing state 10～15min；
（5）To step（4）Vacuum pouring mould carry out solidify afterwards process, successively at 80～90 DEG C heat 2h, 90～110 DEG C
Lower heating 2h, heats 2h at 110～120 DEG C, heats 12h, then be cooled to room temperature with furnace temperature at 120～135 DEG C.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201410015608.1A CN104292767B (en) | 2014-01-13 | 2014-01-13 | Vacuum casting mold material used for electrical insulation parts, and preparation method of mold |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410015608.1A CN104292767B (en) | 2014-01-13 | 2014-01-13 | Vacuum casting mold material used for electrical insulation parts, and preparation method of mold |
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| CN104292767B true CN104292767B (en) | 2017-02-15 |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105838033A (en) * | 2016-05-05 | 2016-08-10 | 太仓小小精密模具有限公司 | Compression resisting die material |
| TWI660690B (en) * | 2017-02-10 | 2019-06-01 | 寶成工業股份有限公司 | Manufacturing method of combination of mold for a sole |
| CN107746530A (en) * | 2017-11-18 | 2018-03-02 | 五河县黄淮粮油机械有限公司 | A kind of manufacture method of insulated product mould |
| CN110542843B (en) * | 2019-09-29 | 2024-01-23 | 广东电网有限责任公司 | Casting type bubble discharge model and manufacturing method thereof |
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| CN104292767A (en) | 2015-01-21 |
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