CN105818304A - Method for treating surface layer of die set of electric vehicle - Google Patents
Method for treating surface layer of die set of electric vehicle Download PDFInfo
- Publication number
- CN105818304A CN105818304A CN201610301642.4A CN201610301642A CN105818304A CN 105818304 A CN105818304 A CN 105818304A CN 201610301642 A CN201610301642 A CN 201610301642A CN 105818304 A CN105818304 A CN 105818304A
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- Prior art keywords
- resin
- mould
- firming agent
- fiber cloth
- parts
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Classifications
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C33/00—Moulds or cores; Details thereof or accessories therefor
- B29C33/38—Moulds or cores; Details thereof or accessories therefor characterised by the material or the manufacturing process
- B29C33/3842—Manufacturing moulds, e.g. shaping the mould surface by machining
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C33/00—Moulds or cores; Details thereof or accessories therefor
- B29C33/38—Moulds or cores; Details thereof or accessories therefor characterised by the material or the manufacturing process
- B29C33/3807—Resin-bonded materials, e.g. inorganic particles
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C70/00—Shaping composites, i.e. plastics material comprising reinforcements, fillers or preformed parts, e.g. inserts
- B29C70/04—Shaping composites, i.e. plastics material comprising reinforcements, fillers or preformed parts, e.g. inserts comprising reinforcements only, e.g. self-reinforcing plastics
- B29C70/28—Shaping operations therefor
- B29C70/30—Shaping by lay-up, i.e. applying fibres, tape or broadsheet on a mould, former or core; Shaping by spray-up, i.e. spraying of fibres on a mould, former or core
- B29C70/34—Shaping by lay-up, i.e. applying fibres, tape or broadsheet on a mould, former or core; Shaping by spray-up, i.e. spraying of fibres on a mould, former or core and shaping or impregnating by compression, i.e. combined with compressing after the lay-up operation
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29L—INDEXING SCHEME ASSOCIATED WITH SUBCLASS B29C, RELATING TO PARTICULAR ARTICLES
- B29L2031/00—Other particular articles
- B29L2031/757—Moulds, cores, dies
Abstract
The invention provides a method for treating a surface layer of a die set of an electric vehicle, and relates to the technical field of production of electric vehicles. The method comprises the following process steps: waxing, gel coating, 01 fiber cloth coating, putty coating, 04 fiber cloth coating, and 300 # fiber mat coating. Through the method, treatment of the surface layer of the die set of the electric vehicle in the prior art is improved, the problems that treatment of surface layers of dies of an electric vehicle in the prior art is imperfect and relatively rough, so that the surface layer of a vehicle body of the produced electric vehicle is rough and is not smooth enough, after being used repeatedly, the dies cannot be used again, production costs of an enterprise are increased invisibly, and resources are wasted are solved, after the surface layer of the die set of the electric vehicle is treated, the die set of the electric vehicle not only becomes smooth, but also is wear-resistant and corrosion-resistant, and is long in service life, the product quality of the electric vehicle is improved, and the production costs of the enterprise are reduced invisibly.
Description
Technical field:
The present invention relates to electric motor car production technical field, be specifically related to a kind of electric motor car die set method for treating surface layer.
Background technology:
When electric motor car produces, the quality of electric motor car mould, the length in service life, directly influences the number of the quality of the quality of electric motor car finished product and the cost of production, the imperfection of the electric motor car mould treatment of prior art, the most coarse, causing the electric bicycle surface layer produced coarse the most smooth, mould, after being used for multiple times, cannot reuse, virtually cause enterprise's production cost to increase, and cause the waste of resource.
Summary of the invention:
The present invention provides a kind of electric motor car die set method for treating surface layer, the treatment of the electric motor car die set of prior art is improved by the method, electric motor car die set after treatment, not only become more smooth, and it is wear-resistant, corrosion-resistant, service life is longer, improves the product quality of electric motor car, virtually reduces the production cost of enterprise.
The technical problem to be solved uses following technical scheme to realize:
A kind of electric motor car die set method for treating surface layer, it is characterised in that following steps:
1) waxing:
1.1) prepare: by mould horizontal on ground or operating board, do not allow mould wantonly rock, clear up mold working surface with cotton towel, it is ensured that its smooth no-sundries, not damaged；
1.2) waxing: spread 8# Cera Flava by crocus cloth, more uniformly embrocate to mold working surface, behind complete surface to be coated every waxing half an hour fully；
1.3) wax is removed: thoroughly removed the Cera Flava of mold working surface by towel so that it is bright and clean exclusion；
2) it is coated with gel coat:
2.1) in former bucket, being sufficiently stirred for gel coat before using, but speed wanting slow in order to avoid being mixed into air, contained by the water ladle of cleaning and take gel coat, the most inwardly add appropriate mill base and firming agent, stir, it is ensured that the most even stability of color；
2.2) full one layer of gel coats is brushed by hairbrush uniformly at die-face, after cured, when gel coating resin finger tap the most viscous hands and non-cohesive on hand time, carry out next step operation, mould is coated with to the difficult part of gel coat, such as deep trouth, the gel coat setting time in this district is longer, and a small amount of ventilation can be used to solidify；
Described coating layer thickness is 1mm, and hardening time is 0.5h, and when being coated with gel coat, indoor temperature is 25 DEG C；
Described gel coat is boiled formed by rubber 15 parts, 10 parts of Colophonium, modified corn starch 10 parts, vegetable oil 10 parts, deionized water 15 parts, 5 parts of mixing of antioxidant；
Described mill base is formed by cement 10 parts, hybrid pigment 15 parts, attapulgite clay 10 parts, Oleum Verniciae fordii 15 parts, Oleum Pini 8 parts, 3 parts of hybrid modulation of surfactant；
Described firming agent is GB firming agent；
Described gel coat: mill base: the ratio of firming agent is 100:6:4；
3) 01 fiber cloth is covered:
3.1) after gel coat solidifies, brush resin, contain again by water ladle and take 123# resin, then add appropriate firming agent and mix thoroughly；
3.2) by the full one layer of resin of scrubbing brush uniform on hairbrush gel coat after hardening, avoid buildup of resin too much, 01 fiber cloth cut out in advance is attached to make it the most drenched on the resin just brushed and with resin rapidly, suction is attached to mould inner surface, some protruding and recess, is cut into suitable size and shape cloth as required；
3.3) going through, the place of omission to be subsidized, and it is fiber cloth reinforced that intermediate location to put two-layer more；
3.4) after 01 fiber cloth solidification, check for bubble, and even out with perching knife；
Described resin is 100:4 with the ratio of smearing of firming agent；
Described hardening time is 0.5h, and when covering 01 fiber cloth, indoor temperature is 25 DEG C,
4) it is coated with putty: connect above-mentioned operation, brushing one layer of putty coating in 01 fiber cloth after hardening uniformly, described putty is made up of resin, firming agent, Pulvis Talci, resin: firming agent: Pulvis Talci ratio is 1:0.08:1.5, coating layer thickness is 2mm, and indoor temperature is 25 DEG C；
5) 04 fiber cloth is covered: be painted with putty, one layer of 04 fiber cloth is covered rapidly above, and make fiber cloth the most drenched by brushing resin and firming agent, absorption is on mould, described resin and firming agent brushing are uniform, it is to avoid buildup of resin is too much, and the ratio between resin and firming agent is 100:4, when covering 04 fiber cloth, indoor temperature is 25 DEG C；
6) 300# fiber felt is covered:
6.1) 300# fiber felt is spread after completing 04# fiber cloth the most thereon, and by brushing resin and firming agent coating again, make fiber cloth the most drenched, surface is the most firmly smoothed by hairbrush, till making it occur without bubble, burr, described coating layer thickness is 4mm, and the ratio between resin and firming agent is 100:4, when covering 300# fiber felt, indoor temperature is 25 DEG C；
6.2) etc. to be solidified, described hardening time is 0.5h；
7) matched moulds:
7.1), after etc. whole set of die is coated with completely and brushes and solidify, edge is repaired neat with cutter；
7.2) pressing mould bonding station splicing matched moulds, junction is fastened by bolts；
7.3) after matched moulds, with covering cloth at mould connecting sewing, by using putty brushing once, then cover bonding by the 04# fiber cloth that two-layer width is 150, make it drench with hairbrush resin pickup zhang brushing, inhale with mould and cover, wait to be solidified；
7.4) after the solidification of 04## fiber cloth, outside it, again cover two-layer 300# fiber felt, make it drenched with hairbrush resin pickup zhang and inhale with mould to cover, wait curing of coatings；
Described putty is made up of resin, firming agent, Pulvis Talci, resin: firming agent: Pulvis Talci ratio is 1:0.08:1.5, and coating layer thickness is 2mm, and indoor temperature is 25 DEG C, and hardening time is 4～6h, and matched moulds position to cover two-layer 300# fiber felt more and reinforce；
8) demoulding:
8.1) after the coating until above-mentioned mould is completely dried solidification, take connecting bolt apart, beat the mould back side and edge by the rubber hammer power of fitting, help it to come off；
8.2), after mould all disassembles, carry out partial trim, as mould for a long time need not, can not demoulding, be bearing in mould by alternate products, prevent die deformation.
A kind of electric motor car die set method for treating surface layer of offer is provided, the treatment of the electric motor car die set of prior art is improved by the method, electric motor car die set after treatment, not only become more smooth, and it is wear-resistant, corrosion-resistant, service life is longer, improves the product quality of electric motor car, virtually reduces the production cost of enterprise.
Detailed description of the invention:
For the technological means making the present invention realize, creation characteristic, reach purpose and be easy to understand with effect, below in conjunction with specific embodiment, the present invention is expanded on further.
A kind of electric motor car die set method for treating surface layer, passes through following steps:
1) waxing:
1.1) prepare: by mould horizontal on ground or operating board, do not allow mould wantonly rock, clear up mold working surface with cotton towel, it is ensured that its smooth no-sundries, not damaged；
1.2) waxing: spread 8# Cera Flava by crocus cloth, more uniformly embrocate to mold working surface, behind complete surface to be coated every waxing half an hour fully；
1.3) wax is removed: thoroughly removed the Cera Flava of mold working surface by towel so that it is bright and clean exclusion；
2) it is coated with gel coat:
2.1) in former bucket, being sufficiently stirred for gel coat before using, but speed wanting slow in order to avoid being mixed into air, contained by the water ladle of cleaning and take gel coat, the most inwardly add appropriate mill base and firming agent, stir, it is ensured that the most even stability of color；
2.2) full one layer of gel coats is brushed by hairbrush uniformly at die-face, after cured, when gel coating resin finger tap the most viscous hands and non-cohesive on hand time, carry out next step operation, mould is coated with to the difficult part of gel coat, such as deep trouth, the gel coat setting time in this district is longer, and a small amount of ventilation can be used to solidify；
Described firming agent is GB firming agent；
Described coating layer thickness is 1mm, and hardening time is 0.5h, and when being coated with gel coat, indoor temperature is 25 DEG C；
Described gel coat is boiled formed by rubber 15 parts, 10 parts of Colophonium, modified corn starch 10 parts, vegetable oil 10 parts, deionized water 15 parts, 5 parts of mixing of antioxidant；
Described mill base is formed by cement 10 parts, hybrid pigment 15 parts, attapulgite clay 10 parts, Oleum Verniciae fordii 15 parts, Oleum Pini 8 parts, 3 parts of hybrid modulation of surfactant；
Described firming agent is GB firming agent；
Described gel coat: mill base: the ratio of firming agent is 100:6:4；
3) 01 fiber cloth is covered:
3.1) after gel coat solidifies, brush resin, contain again by water ladle and take 123# resin, then add appropriate firming agent and mix thoroughly；
3.2) by the full one layer of resin of scrubbing brush uniform on hairbrush gel coat after hardening, avoid buildup of resin too much, 01 fiber cloth cut out in advance is attached to make it the most drenched on the resin just brushed and with resin rapidly, suction is attached to mould inner surface, some protruding and recess, is cut into suitable size and shape cloth as required；
3.3) going through, the place of omission to be subsidized, and it is fiber cloth reinforced that intermediate location to put two-layer more；
3.4) after 01 fiber cloth solidification, check for bubble, and even out with perching knife；
Described resin is 100:4 with the ratio of smearing of firming agent；
Described hardening time is 0.5h, and when covering 01 fiber cloth, indoor temperature is 25 DEG C,
6) it is coated with putty: connect above-mentioned operation, brushing one layer of putty coating in 01 fiber cloth after hardening uniformly, described putty is made up of resin, firming agent, Pulvis Talci, resin: firming agent: Pulvis Talci ratio is 1:0.08:1.5, coating layer thickness is 2mm, and indoor temperature is 25 DEG C；
7) 04 fiber cloth is covered: be painted with putty, one layer of 04 fiber cloth is covered rapidly above, and make fiber cloth the most drenched by brushing resin and firming agent, absorption is on mould, described resin and firming agent brushing are uniform, it is to avoid buildup of resin is too much, and the ratio between resin and firming agent is 100:4, when covering 04 fiber cloth, indoor temperature is 25 DEG C；
6) 300# fiber felt is covered:
6.1) 300# fiber felt is spread after completing 04# fiber cloth the most thereon, and by brushing resin and firming agent coating again, make fiber cloth the most drenched, surface is the most firmly smoothed by hairbrush, till making it occur without bubble, burr, described coating layer thickness is 4mm, and the ratio between resin and firming agent is 100:4, when covering 300# fiber felt, indoor temperature is 25 DEG C；
6.2) etc. to be solidified, described hardening time is 0.5h；
7) matched moulds:
7.1), after etc. whole set of die is coated with completely and brushes and solidify, edge is repaired neat with cutter；
7.2) pressing mould bonding station splicing matched moulds, junction is fastened by bolts；
7.3) after matched moulds, with covering cloth at mould connecting sewing, by using putty brushing once, then cover bonding by the 04# fiber cloth that two-layer width is 150, make it drench with hairbrush resin pickup zhang brushing, inhale with mould and cover, wait to be solidified；
7.4) after the solidification of 04## fiber cloth, outside it, again cover two-layer 300# fiber felt, make it drenched with hairbrush resin pickup zhang and inhale with mould to cover, wait curing of coatings；
Described putty is made up of resin, firming agent, Pulvis Talci, resin: firming agent: Pulvis Talci ratio is 1:0.08:1.5, and coating layer thickness is 2mm, and indoor temperature is 25 DEG C, and hardening time is 4～6h, and matched moulds position to cover two-layer 300# fiber felt more and reinforce；
8) demoulding:
8.1) after the coating until above-mentioned mould is completely dried solidification, take connecting bolt apart, beat the mould back side and edge by the rubber hammer power of fitting, help it to come off；
8.2), after mould all disassembles, carry out partial trim, as mould for a long time need not, can not demoulding, be bearing in mould by alternate products, prevent die deformation.
Claims (3)
1. an electric motor car die set method for treating surface layer, it is characterised in that following steps:
1) waxing:
1.1) prepare: by mould horizontal on ground or operating board, do not allow mould wantonly rock, clear up mold working surface with cotton towel, it is ensured that its smooth no-sundries, not damaged；
1.2) waxing: spread 8# Cera Flava by crocus cloth, more uniformly embrocate to mold working surface, behind complete surface to be coated every waxing half an hour fully；
1.3) wax is removed: thoroughly removed the Cera Flava of mold working surface by towel so that it is bright and clean exclusion；
2) it is coated with gel coat:
2.1) in former bucket, being sufficiently stirred for gel coat before using, but speed wanting slow in order to avoid being mixed into air, contained by the water ladle of cleaning and take gel coat, the most inwardly add appropriate mill base and firming agent, stir, it is ensured that the most even stability of color；
2.2) full one layer of gel coats is brushed by hairbrush uniformly at die-face, after cured, when gel coating resin finger tap the most viscous hands and non-cohesive on hand time, carry out next step operation, mould is coated with to the difficult part of gel coat, such as deep trouth, the gel coat setting time in this district is longer, and a small amount of ventilation can be used to solidify；
Described coating layer thickness is 1mm, and hardening time is 0.5h, and when being coated with gel coat, indoor temperature is 25 DEG C；
Described firming agent is GB firming agent；
Described gel coat: mill base: the ratio of firming agent is 100:6:4；
3) 01 fiber cloth is covered:
3.1) after gel coat solidifies, brush resin, contain again by water ladle and take 123# resin, then add appropriate firming agent and mix thoroughly；
3.2) by the full one layer of resin of scrubbing brush uniform on hairbrush gel coat after hardening, avoid buildup of resin too much, 01 fiber cloth cut out in advance is attached to make it the most drenched on the resin just brushed and with resin rapidly, suction is attached to mould inner surface, some protruding and recess, is cut into suitable size and shape cloth as required；
3.3) going through, the place of omission to be subsidized, and it is fiber cloth reinforced that intermediate location to put two-layer more；
3.4) after 01 fiber cloth solidification, check for bubble, and even out with perching knife；
Described resin is 100:4 with the ratio of smearing of firming agent；
Described hardening time is 0.5h, and when covering 01 fiber cloth, indoor temperature is 25 DEG C,
4) it is coated with putty: connect above-mentioned operation, brushing one layer of putty coating in 01 fiber cloth after hardening uniformly, described putty is made up of resin, firming agent, Pulvis Talci, resin: firming agent: Pulvis Talci ratio is 1:0.08:1.5, coating layer thickness is 2mm, and indoor temperature is 25 DEG C；
5) 04 fiber cloth is covered: be painted with putty, one layer of 04 fiber cloth is covered rapidly above, and make fiber cloth the most drenched by brushing resin and firming agent, absorption is on mould, described resin and firming agent brushing are uniform, it is to avoid buildup of resin is too much, and the ratio between resin and firming agent is 100:4, when covering 04 fiber cloth, indoor temperature is 25 DEG C；
6) cloth 300# fiber felt is covered:
6.1) 300# fiber felt is spread after completing 04# fiber cloth the most thereon, and by brushing resin and firming agent coating again, make fiber cloth the most drenched, surface is the most firmly smoothed by hairbrush, till making it occur without bubble, burr, described coating layer thickness is 4mm, and the ratio between resin and firming agent is 100:4, when covering 300# fiber felt, indoor temperature is 25 DEG C；
6.2) etc. to be solidified, described hardening time is 0.5h；
7) matched moulds:
7.1), after etc. whole set of die is coated with completely and brushes and solidify, edge is repaired neat with cutter；
7.2) pressing mould bonding station splicing matched moulds, junction is fastened by bolts；
7.3) after matched moulds, with covering cloth at mould connecting sewing, by using putty brushing once, then cover bonding by the 04# fiber cloth that two-layer width is 150, make it drench with hairbrush resin pickup zhang brushing, inhale with mould and cover, wait to be solidified；
7.4) after the solidification of 04## fiber cloth, outside it, again cover two-layer 300# fiber felt, make it drenched with hairbrush resin pickup zhang and inhale with mould to cover, wait curing of coatings；
Described putty is made up of resin, firming agent, Pulvis Talci, resin: firming agent: Pulvis Talci ratio is 1:0.08:1.5, and coating layer thickness is 2mm, and indoor temperature is 25 DEG C, and hardening time is 4～6h, and matched moulds position to cover two-layer 300# fiber felt more and reinforce；
8) demoulding:
8.1) after the coating until above-mentioned mould is completely dried solidification, take connecting bolt apart, beat the mould back side and edge by the rubber hammer power of fitting, help it to come off；
8.2), after mould all disassembles, carry out partial trim, as mould for a long time need not, can not demoulding, be bearing in mould by alternate products, prevent die deformation.
A kind of electric motor car die set method for treating surface layer the most according to claim 1, it is characterized in that, described gel coat is boiled formed by rubber 15 parts, 10 parts of Colophonium, modified corn starch 10 parts, vegetable oil 10 parts, deionized water 15 parts, 5 parts of mixing of antioxidant.
A kind of electric motor car die set method for treating surface layer the most according to claim 1, it is characterised in that described mill base is formed by cement 10 parts, hybrid pigment 15 parts, attapulgite clay 10 parts, Oleum Verniciae fordii 15 parts, Oleum Pini 8 parts, 3 parts of hybrid modulation of surfactant.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610301642.4A CN105818304B (en) | 2016-05-05 | 2016-05-05 | A kind of electric car die set method for treating surface layer |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610301642.4A CN105818304B (en) | 2016-05-05 | 2016-05-05 | A kind of electric car die set method for treating surface layer |
Publications (2)
| Publication Number | Publication Date |
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| CN105818304A true CN105818304A (en) | 2016-08-03 |
| CN105818304B CN105818304B (en) | 2018-04-20 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201610301642.4A Active CN105818304B (en) | 2016-05-05 | 2016-05-05 | A kind of electric car die set method for treating surface layer |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107379597A (en) * | 2017-09-08 | 2017-11-24 | 上海伊瑟卫浴有限公司 | A kind of production method of step-in type bathtub |
| CN108943519A (en) * | 2017-05-18 | 2018-12-07 | 湖北创意模具股份有限公司 | The preparation method of new material resin die |
| CN110815680A (en) * | 2019-11-07 | 2020-02-21 | 上海金标文化创意股份有限公司 | Method for reinforcing and repairing density board die |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1429725A (en) * | 2001-12-30 | 2003-07-16 | 聂保廷 | Repairing method of automobile non-metal parts |
| CN101077627A (en) * | 2006-05-23 | 2007-11-28 | 广州好达实业有限公司 | Method for processing electric motor vehicle appearance piece surface with color fiberglass |
| CN104070001A (en) * | 2014-06-13 | 2014-10-01 | 安徽省宏宝莱机车科技有限公司 | Plastic part coating process of electric vehicle |
| CN104260370A (en) * | 2014-07-28 | 2015-01-07 | 厦门纵横通电动车有限公司 | Method for manufacturing paint-spraying-free electric sightseeing vehicle covering part |
-
2016
- 2016-05-05 CN CN201610301642.4A patent/CN105818304B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1429725A (en) * | 2001-12-30 | 2003-07-16 | 聂保廷 | Repairing method of automobile non-metal parts |
| CN101077627A (en) * | 2006-05-23 | 2007-11-28 | 广州好达实业有限公司 | Method for processing electric motor vehicle appearance piece surface with color fiberglass |
| CN104070001A (en) * | 2014-06-13 | 2014-10-01 | 安徽省宏宝莱机车科技有限公司 | Plastic part coating process of electric vehicle |
| CN104260370A (en) * | 2014-07-28 | 2015-01-07 | 厦门纵横通电动车有限公司 | Method for manufacturing paint-spraying-free electric sightseeing vehicle covering part |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108943519A (en) * | 2017-05-18 | 2018-12-07 | 湖北创意模具股份有限公司 | The preparation method of new material resin die |
| CN107379597A (en) * | 2017-09-08 | 2017-11-24 | 上海伊瑟卫浴有限公司 | A kind of production method of step-in type bathtub |
| CN110815680A (en) * | 2019-11-07 | 2020-02-21 | 上海金标文化创意股份有限公司 | Method for reinforcing and repairing density board die |
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| Publication number | Publication date |
|---|---|
| CN105818304B (en) | 2018-04-20 |
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