CN107718594A - A kind of production technology of automobile top cover assembly - Google Patents
A kind of production technology of automobile top cover assembly Download PDFInfo
- Publication number
- CN107718594A CN107718594A CN201710706443.6A CN201710706443A CN107718594A CN 107718594 A CN107718594 A CN 107718594A CN 201710706443 A CN201710706443 A CN 201710706443A CN 107718594 A CN107718594 A CN 107718594A
- Authority
- CN
- China
- Prior art keywords
- mould
- top cover
- production technology
- automobile top
- cover assembly
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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Classifications
-
- 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
- B29C70/36—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 impregnating by casting, e.g. vacuum casting
-
- 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
- B29C33/70—Maintenance
- B29C33/72—Cleaning
-
- 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
- B29C70/54—Component parts, details or accessories; Auxiliary operations, e.g. feeding or storage of prepregs or SMC after impregnation or during ageing
-
- 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
- B29C70/54—Component parts, details or accessories; Auxiliary operations, e.g. feeding or storage of prepregs or SMC after impregnation or during ageing
- B29C70/545—Perforating, cutting or machining during or after moulding
-
- 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
- B29L2031/30—Vehicles, e.g. ships or aircraft, or body parts thereof
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Chemical & Material Sciences (AREA)
- Composite Materials (AREA)
- Moulding By Coating Moulds (AREA)
Abstract
The invention discloses a kind of production technology of automobile top cover assembly, it is related to auto parts and components production technology field, comprises the following steps：1) early-stage preparations, with resin material；2) early-stage preparations, mould heating；3) mold；4) shifting formwork pressurizes to press；5) vacuum tube is connect, is vacuumized；6) injecting glue；7) mount point in insertion；8) product solidifies；9) shifting formwork molds pickup to upset；10) employee's self-test and quality inspection；11) sizing is placed；12) High Speed Milling Operation is cut；13) quality inspection is carried out to product；14) library storage is entered, invention adopts the composite of Foamex combined fiberglass, is internally embedded installation point mode, and high speed passenger car composite material automobile top cover assembly is made using rational production technology, with good rigidity and intensity, to reach automobile top cover requirement.
Description
Technical field
The present invention relates to auto parts and components production technology field, and in particular to a kind of production technology of automobile top cover assembly.
Background technology
Automobile top cover covering for roofs is the cover plate of car body top.For the global stiffness of coachbuilt body, top cover is not very
Important part, this is also to allow skylight is opened up on covering for roofs the reasons why.
A kind of automobile production equipment is disclosed under Chinese application number 103962451.A kind of automobile top cover die, including it is upper
Die holder and skylight piercer, the switching gas that the upper bolster is additionally provided with movable push and drives movable push to move in the horizontal direction
Cylinder, the skylight piercer are liftably located at the upper bolster with the lower section for being connected to the upper bolster, the movable push
Between skylight piercer, the lower surface of the movable push is provided with the first jacking projection, the upper surface of the skylight piercer
Provided with the second jacking projection coordinated with the described first jacking projection.The invention provides one kind can meet having skylight top simultaneously
Lid and the automobile top cover die for producing needs without skylight top cover, solve existing same vehicle has skylight top cover and without day
Window top cover needs two molds to carry out producing caused deficiency.
A kind of automobile production equipment is disclosed in China Patent No. 103962451.A kind of automobile top cover die, including upper mould
Seat and skylight piercer, the switching gas that the upper bolster is additionally provided with movable push and drives movable push to move in the horizontal direction
Cylinder, the skylight piercer are liftably located at the upper bolster with the lower section for being connected to the upper bolster, the movable push
Between skylight piercer, the lower surface of the movable push is provided with the first jacking projection, the upper surface of the skylight piercer
Provided with the second jacking projection coordinated with the described first jacking projection.The invention provides one kind can meet having skylight top simultaneously
Lid and the automobile top cover die for producing needs without skylight top cover, solve existing same vehicle has skylight top cover and without day
Window top cover needs two molds to carry out producing caused deficiency.
Existing automobile top cover production and processing technology also imperfection, causes the rigidity of automobile top cover and intensity occurs and asked
Topic.
The content of the invention
It is caused in the prior art to solve it is an object of the invention to provide a kind of production technology of automobile top cover assembly
Above-mentioned multinomial defect.
A kind of production technology of automobile top cover assembly, comprises the following steps：
1) early-stage preparations, with resin material：By resin uniform stirring 25 minutes, glass fibre is added in resin and stirred again
Mix, wherein the proportioning of resin and glass fibre is 100:1-1.5；
2) early-stage preparations, mould heating：Mould is heated, when mold temperature is more than or equal to 25 DEG C, stopping is heated；
3) mold, matched moulds；
4) shifting formwork pressurizes to press：Press pressing time was controlled in 15-25 minutes；
5) vacuum tube is connect, is vacuumized：Check that evacuated pressure up on -0.08MP, is then transferred to -0.08MP in -0.1MP
Upper injecting glue, vacuum pressure is transferred on -0.06 to -0.075MP after having noted；
6) injecting glue：Whether injecting glue pipeline is unimpeded, confirm injecting glue temperature between 25-32 DEG C；Whether check curing agent numerical value
Correctly；Curing agent proportioning is the 2.5-3.5% of mixture in step 1)；
7) mount point in insertion：Under product also its uncured state platform, the mount point in insertion at the product corner；
8) product solidifies：Wait minute hardening time 15-25；Verification step 6) in mixture be fully cured, by injected rubber hose
Cull bending, if disconnect vestige, then can determine whether to have been cured；
9) shifting formwork molds pickup to upset；
10) employee's self-test and quality inspection；
11) sizing is placed；
12) High Speed Milling Operation is cut：In cutting process, check whether cutting process is correct, if cutting is in place；
13) quality inspection is carried out to product：Load to examine and product quality detection is carried out in frock and filters out substandard products；
14) library storage is entered：Qualified product is put in storage by number, categories subarea domain examine.
Preferably, the proportioning of resin and glass fibre is 100 in the step 1):1.25.
Preferably, the step 3) die sinking specifically comprises the following steps：
31) mold：Carried out during upset die sinking spacing；
32) mould cleaning and coating release agent on：The spot that is remained in cleaning on mould simultaneously ensures that upper cavity is intact；Existed using cotton
Followed on upper cavity on coating release agent, during coating among after first four weeks, the principle of straight line coating, wherein new mould is, it is necessary to apply
Five demoulding water are covered, adjacent intermediate demand twice will be coated with after the demoulding water wiped clean of last time, and each interval 8.5 is divided
Clock；
33) mould shifting formwork glue spraying clothing on：Spraying is uniform, is not allow for sagging trace, show-through, corrugation, seminess, gel coat thickness
Reach requirement, gel coat thickness presses design requirement, tolerance+0.05；
34) mould cured gel coat on：Cure cycle is 10-18 minutes；
35) mould is cleared up under：Clear up on lower mould the spot remained and ensure that lower mode cavity is intact；
36) mould trachea under：Ensure that tracheae connects and seal air tight；
37) mould matches somebody with somebody gel coat under：Wherein descend mould gel coat：Additive：The proportioning of curing agent is 100：35：3；
38) mould, upper mould once spread glass felt under：Check whether fabric direction is correct in lower mould, and glass fibre lays smooth, nothing
Fold；Whether mould fabric direction is correct in inspection, and glass fibre lays smooth, corrugationless；
39) upper mould is moved to turnover mould-matching：Checked before matched moulds on mould, the glass felt and inserts state laid on lower mode cavity are just
Really.Matched moulds is completed, and is checked on mould, lower mode cavity matched moulds is complete, and die edge is neat；Upper mould lifting is limited during turnover mould-matching
Position.
In the present embodiment, curing agent proportioning is 3% of mixture in step 1) in the step 6).
In the present embodiment, the step 8) the medium time to be solidified is 25 minutes.
In the present embodiment, mold sticking is run into the step 9) in the knockout course of die sinking pickup to be sure not firmly
Suddenly, prevent from tearing gel coat face to shreds.
The advantage of the invention is that：The present invention adopts the composite of Foamex combined fiberglass, is internally embedded peace
Mode is decorateeed, high speed passenger car composite material automobile top cover assembly is made using rational production technology, there is good rigidity
And intensity, to reach automobile top cover requirement.
Brief description of the drawings
Fig. 1 is the structural representation of product of the present invention.
Wherein, 1- mount points.
Embodiment
To be easy to understand the technical means, the inventive features, the objects and the advantages of the present invention, lower mode cavity knot
Embodiment is closed, the present invention is expanded on further.
As shown in figure 1, a kind of production technology of automobile top cover assembly, comprises the following steps：
1) early-stage preparations, with resin material：By resin uniform stirring 25 minutes, glass fibre is added in resin and stirred again
Mix, wherein the proportioning of resin and glass fibre is 100:1-1.5；
2) early-stage preparations, mould heating：Mould is heated, when mold temperature is more than or equal to 25 DEG C, stopping is heated；
3) mold, matched moulds；
4) shifting formwork pressurizes to press：Press pressing time was controlled in 15-25 minutes；
5) vacuum tube is connect, is vacuumized：Check that evacuated pressure up on -0.08MP, is then transferred to -0.08MP in -0.1MP
Upper injecting glue, vacuum pressure is transferred on -0.06 to -0.075MP after having noted；
6) injecting glue：Whether injecting glue pipeline is unimpeded, confirm injecting glue temperature between 25-32 DEG C；Whether check curing agent numerical value
Correctly；Curing agent proportioning is the 2.5-3.5% of mixture in step 1)；
7) mount point in insertion：Under product also its uncured state platform, the mount point 1 in insertion at the product corner；
8) product solidifies：Wait minute hardening time 15-25；Verification step 6) in mixture be fully cured, by injected rubber hose
Cull bending, if disconnect vestige, then can determine whether to have been cured；
9) shifting formwork molds pickup to upset；
10) employee's self-test and quality inspection；
11) sizing is placed；
12) High Speed Milling Operation is cut：In cutting process, check whether cutting process is correct, if cutting is in place；
13) quality inspection is carried out to product：Load to examine and product quality detection is carried out in frock and filters out substandard products；
14) library storage is entered：Qualified product is put in storage by number, categories subarea domain examine.
In the present embodiment, the proportioning of resin and glass fibre is 100 in the step 1):1.25.
In the present embodiment, the step 3) die sinking specifically comprises the following steps：
31) mold：Carried out during upset die sinking spacing；
32) mould cleaning and coating release agent on：The spot that is remained in cleaning on mould simultaneously ensures that upper cavity is intact；Existed using cotton
Followed on upper cavity on coating release agent, during coating among after first four weeks, the principle of straight line coating, wherein new mould is, it is necessary to apply
Five demoulding water are covered, adjacent intermediate demand twice will be coated with after the demoulding water wiped clean of last time, and each interval 8.5 is divided
Clock；
33) mould shifting formwork glue spraying clothing on：Spraying is uniform, is not allow for sagging trace, show-through, corrugation, seminess, gel coat thickness
Reach requirement, gel coat thickness presses design requirement, tolerance+0.05；
34) mould cured gel coat on：Cure cycle is 10-18 minutes；
35) mould is cleared up under：Clear up on lower mould the spot remained and ensure that lower mode cavity is intact；
36) mould trachea under：Ensure that tracheae connects and seal air tight；
37) mould matches somebody with somebody gel coat under：Wherein descend mould gel coat：Additive：The proportioning of curing agent is 100：35：3；
38) mould, upper mould once spread glass felt under：Check whether fabric direction is correct in lower mould, and glass fibre lays smooth, nothing
Fold；Whether mould fabric direction is correct in inspection, and glass fibre lays smooth, corrugationless；
39) upper mould is moved to turnover mould-matching：Checked before matched moulds on mould, the glass felt and inserts state laid on lower mode cavity are just
Really.Matched moulds is completed, and is checked on mould, lower mode cavity matched moulds is complete, and die edge is neat；Upper mould lifting is limited during turnover mould-matching
Position.
In the present embodiment, curing agent proportioning is 3% of mixture in step 1) in the step 6).
In the present embodiment, the step 8) the medium time to be solidified is 25 minutes.
In the present embodiment, mold sticking is run into the step 9) in the knockout course of die sinking pickup to be sure not firmly
Suddenly, prevent from tearing gel coat face to shreds.
Based on above-mentioned, the present invention adopts the composite of Foamex combined fiberglass, is internally embedded the side of mount point 1
Formula, high speed passenger car composite material automobile top cover assembly is made using rational production technology, there is good rigidity and intensity,
To reach automobile top cover requirement.
As known by the technical knowledge, the present invention can pass through the embodiment party of other essence without departing from its spirit or essential feature
Case is realized.Therefore, embodiment disclosed above, for each side, all it is merely illustrative, is not only.Institute
Have within the scope of the present invention or be included in the invention in the change being equal in the scope of the present invention.
Claims (6)
1. a kind of production technology of automobile top cover assembly, it is characterised in that comprise the following steps：
1) early-stage preparations, with resin material：By resin uniform stirring 25 minutes, glass fibre is added in resin and is again stirring for, its
The proportioning of middle resin and glass fibre is 100:1-1.5；
2) early-stage preparations, mould heating：Mould is heated, when mold temperature is more than or equal to 25 DEG C, stopping is heated；
3) mold, matched moulds；
4) shifting formwork pressurizes to press：Press pressing time was controlled in 15-25 minutes；
5) vacuum tube is connect, is vacuumized：Check that evacuated pressure up on -0.08MP, is then transferred on -0.08MP and noted in -0.1MP
Glue, vacuum pressure is transferred on -0.06 to -0.075MP after having noted；
6) injecting glue：Whether injecting glue pipeline is unimpeded, confirm injecting glue temperature between 25-32 DEG C；Check whether curing agent numerical value is correct；
Curing agent proportioning is the 2.5-3.5% of mixture in step 1)；
7) mount point in insertion：Under product also its uncured state platform, the mount point (1) in insertion at the product corner；
8) product solidifies：Wait minute hardening time 15-25；Verification step 6) in mixture be fully cured, by the residual of injected rubber hose
Resin is stayed to bend, if the vestige disconnected, then can determine whether to have been cured；
9) shifting formwork molds pickup to upset；
10) employee's self-test and quality inspection；
11) sizing is placed；
12) High Speed Milling Operation is cut：In cutting process, check whether cutting process is correct, if cutting is in place；
13) quality inspection is carried out to product：Load to examine and product quality detection is carried out in frock and filters out substandard products；
14) library storage is entered：Qualified product is put in storage by number, categories subarea domain examine.
A kind of 2. production technology of automobile top cover assembly according to claim 1, it is characterised in that：Set in the step 1)
The proportioning of fat and glass fibre is 100:1.25.
A kind of 3. production technology of automobile top cover assembly according to claim 1, it is characterised in that：Step 3) the die sinking
Specifically include following steps：
31) mold：Carried out during upset die sinking spacing；
32) mould cleaning and coating release agent on：The spot that is remained in cleaning on mould simultaneously ensures that upper cavity is intact；Using cotton in upper mould
Followed on chamber on coating release agent, during coating among after first four weeks, the principle of straight line coating, wherein new mould is, it is necessary to coat five
Secondary releasing agent, adjacent intermediate demand twice will be coated with after the releasing agent wiped clean of last time, each interval 8.5 minutes；
33) mould shifting formwork glue spraying clothing on：Spraying is uniform, is not allow for sagging trace, show-through, corrugation, seminess, gel coat thickness reaches
It is required that gel coat thickness presses design requirement, tolerance+0.05cm；
34) mould cured gel coat on：Cure cycle is 10-18 minutes；
35) mould is cleared up under：Clear up on the lower mode cavity of lower mould the spot remained and ensure that lower mode cavity is intact；
36) mould trachea under：Ensure that tracheae connects and confirms to seal air tight；
37) mould matches somebody with somebody gel coat under：Wherein descend mould gel coat：Additive：The proportioning of curing agent is 100：35：3；
38) mould, upper mould once spread glass felt under：Check whether fabric direction is correct in lower mould, and glass fibre lays smooth, aptychus
Wrinkle；Whether mould fabric direction is correct in inspection, and glass fibre lays smooth, corrugationless；
39) upper mould is moved to turnover mould-matching：Being checked before matched moulds on mould, the glass felt and inserts state laid on lower mode cavity are correct,
Matched moulds is completed, and is checked on mould, lower mode cavity matched moulds is complete, and die edge is neat；Upper mould lifting is carried out spacing during turnover mould-matching.
A kind of 4. production technology of automobile top cover assembly according to claim 1, it is characterised in that：It is solid in the step 6)
Agent proportioning is 3% of mixture in step 1).
A kind of 5. production technology of automobile top cover assembly according to claim 1, it is characterised in that：The step 8) is medium
Time to be solidified is 25 minutes.
A kind of 6. production technology of automobile top cover assembly according to claim 1, it is characterised in that：Opened in the step 9)
Mold sticking is run into the knockout course of mould pickup to be sure not to overexert, and prevents from tearing gel coat face to shreds.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710706443.6A CN107718594A (en) | 2017-08-17 | 2017-08-17 | A kind of production technology of automobile top cover assembly |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710706443.6A CN107718594A (en) | 2017-08-17 | 2017-08-17 | A kind of production technology of automobile top cover assembly |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN107718594A true CN107718594A (en) | 2018-02-23 |
Family
ID=61205118
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201710706443.6A Withdrawn CN107718594A (en) | 2017-08-17 | 2017-08-17 | A kind of production technology of automobile top cover assembly |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN107718594A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110014670A (en) * | 2019-03-20 | 2019-07-16 | 武汉格罗夫氢能汽车有限公司 | A kind of small angle R Carbon fibe vehicle body production method |
| CN110576623A (en) * | 2019-09-17 | 2019-12-17 | 成都市冠宇复合材料制品有限公司 | Production process of high-precision large glass fiber reinforced plastic projection screen shell substrate and shell manufactured by production process |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0976266A (en) * | 1995-09-12 | 1997-03-25 | Honda Motor Co Ltd | Preparation of laminated body |
| CN1792619A (en) * | 2005-12-31 | 2006-06-28 | 北京玻钢院复合材料有限公司 | Method for mfg. covering unit of composite material for vehicle |
| US20080073943A1 (en) * | 2006-09-07 | 2008-03-27 | Martin Pollak | Roof frame for a motor vehicle |
| CN102514207A (en) * | 2011-12-14 | 2012-06-27 | 奇瑞汽车股份有限公司 | Production method of composite material automobile parts |
| CN102922621A (en) * | 2012-11-23 | 2013-02-13 | 中国科学院宁波材料技术与工程研究所 | Production method for automobile roof made of fiber reinforced composite material |
| CN103692884A (en) * | 2014-01-02 | 2014-04-02 | 德州北辰复合材料有限公司 | Mold pressing production technology for SMC (surface mounting component) coach air conditioner shell |
-
2017
- 2017-08-17 CN CN201710706443.6A patent/CN107718594A/en not_active Withdrawn
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0976266A (en) * | 1995-09-12 | 1997-03-25 | Honda Motor Co Ltd | Preparation of laminated body |
| CN1792619A (en) * | 2005-12-31 | 2006-06-28 | 北京玻钢院复合材料有限公司 | Method for mfg. covering unit of composite material for vehicle |
| US20080073943A1 (en) * | 2006-09-07 | 2008-03-27 | Martin Pollak | Roof frame for a motor vehicle |
| CN102514207A (en) * | 2011-12-14 | 2012-06-27 | 奇瑞汽车股份有限公司 | Production method of composite material automobile parts |
| CN102922621A (en) * | 2012-11-23 | 2013-02-13 | 中国科学院宁波材料技术与工程研究所 | Production method for automobile roof made of fiber reinforced composite material |
| CN103692884A (en) * | 2014-01-02 | 2014-04-02 | 德州北辰复合材料有限公司 | Mold pressing production technology for SMC (surface mounting component) coach air conditioner shell |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110014670A (en) * | 2019-03-20 | 2019-07-16 | 武汉格罗夫氢能汽车有限公司 | A kind of small angle R Carbon fibe vehicle body production method |
| CN110576623A (en) * | 2019-09-17 | 2019-12-17 | 成都市冠宇复合材料制品有限公司 | Production process of high-precision large glass fiber reinforced plastic projection screen shell substrate and shell manufactured by production process |
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| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
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| WW01 | Invention patent application withdrawn after publication | ||
| WW01 | Invention patent application withdrawn after publication |
Application publication date: 20180223 |