CN109177236A - A kind of abnormity composite material battery case molding die and forming method - Google Patents
A kind of abnormity composite material battery case molding die and forming method Download PDFInfo
- Publication number
- CN109177236A CN109177236A CN201811307920.2A CN201811307920A CN109177236A CN 109177236 A CN109177236 A CN 109177236A CN 201811307920 A CN201811307920 A CN 201811307920A CN 109177236 A CN109177236 A CN 109177236A
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- Prior art keywords
- die
- vacuum
- die ontology
- composite material
- battery case
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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
- 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
- B29C70/40—Shaping or impregnating by compression not applied
- B29C70/42—Shaping or impregnating by compression not applied for producing articles of definite length, i.e. discrete articles
- B29C70/46—Shaping or impregnating by compression not applied for producing articles of definite length, i.e. discrete articles using matched moulds, e.g. for deforming sheet moulding compounds [SMC] or prepregs
- B29C70/48—Shaping or impregnating by compression not applied for producing articles of definite length, i.e. discrete articles using matched moulds, e.g. for deforming sheet moulding compounds [SMC] or prepregs and impregnating the reinforcements in the closed mould, e.g. resin transfer moulding [RTM], e.g. by vacuum
-
- 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
- B29C33/10—Moulds or cores; Details thereof or accessories therefor with incorporated venting means
-
- 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
- B29L—INDEXING SCHEME ASSOCIATED WITH SUBCLASS B29C, RELATING TO PARTICULAR ARTICLES
- B29L2031/00—Other particular articles
- B29L2031/712—Containers; Packaging elements or accessories, Packages
- B29L2031/7146—Battery-cases
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Chemical & Material Sciences (AREA)
- Composite Materials (AREA)
- Moulds For Moulding Plastics Or The Like (AREA)
Abstract
The present invention provides a kind of special-shaped composite material battery case molding die and forming method, including die ontology and die cover plate；The one side wall of die ontology is equipped with vacuum pumping hole；Die cover plate is equipped with aeration aperture and pressure gauge.Orderly laying is carried out in die ontology inner surface using continuous fiber prepreg, forms prepreg lamination, the non-covering vacuum aspirating hole of prepreg lamination；Release cloth and vacuum diaphragm are successively laid in prepreg build-up surface；Vacuum diaphragm covering vacuum aspirating hole, and the edge of vacuum diaphragm and die ontology are tightly connected；It is evacuated outward from vacuum pumping hole, the gap between prepreg lamination and vacuum diaphragm is evacuated to vacuum；Cover die cover plate, by aeration aperture to die cavity gas injection to pressure be 0.2-3Mpa；Mold heating is made into formed product.The present invention by product compression moulding, eliminates product stability difference problem caused by each face discontinuity of product during production using both air pressure and die ontology.
Description
Technical field
The invention belongs to technical field of composite material molding, be related to a kind of special-shaped composite material battery case molding die and at
Type method.
Background technique
Composite material battery case having a extensive future on new-energy automobile, existing composite material battery case forming method
Mainly there are RTM technique and mould pressing process, RTM and mould pressing process apply pressure by upper/lower die, make formed product, due to upper
There are machining errors on the surface of lower mold, when processing profiled composite products, due to type face complexity, upper/lower die table
The accumulation of face machine error, not can guarantee the uniform force of each complex profile, so that each face discontinuity of product, causes product
Stability is poor, therefore existing mould pressing process is not suitable for the product of product type face complexity.
Summary of the invention
Aiming at the problems existing in the prior art, the present invention provide a kind of special-shaped composite material battery case molding die and at
Type method solves the problems, such as that product stability caused by each face discontinuity of product is poor during production.
The present invention is to be achieved through the following technical solutions:
A kind of abnormity composite material battery case molding die, including die ontology and die cover plate；
Die ontology inner surface is consistent with the special-shaped composite material battery box face of preprocessing, in the one side wall of die ontology
Equipped with vacuum pumping hole；Die cover plate is equipped with aeration aperture and pressure gauge；
In use, die cover plate is covered at the top of die ontology, the mould of sealing is formed between die ontology and die cover plate
Chamber；Vacuum pumping hole is connect by pump-line with vaccum-pumping equipment；Aeration aperture is connect by gas ducting with gas source, pressure gauge
For detecting the pressure in die cavity.
Preferably, die ontology top side wall is two-staged step structure, from the outside to the core the level-one highly successively to reduce
Ladder and second level ladder, in use, die cover plate contacts sealing with step, second level ladder is for fixing release cloth and vacuum
Film.
Preferably, safety valve is additionally provided on die cover plate.
Preferably, pump-line is equipped with valve.
A kind of abnormity composite material battery case forming method, based on the special-shaped composite material battery case molding die,
Include the following steps:
Step 1, die ontology inner surface smears release agent；
Step 2, orderly laying is carried out in die ontology inner surface using continuous fiber prepreg, forms prepreg lamination,
The non-covering vacuum aspirating hole of prepreg lamination；
Step 3, release cloth and vacuum diaphragm are successively laid in prepreg build-up surface；Vacuum diaphragm covering vacuum aspirating hole, and
The edge and die ontology of vacuum diaphragm are tightly connected；
Step 4, it is evacuated outward from vacuum pumping hole, the gap between prepreg lamination and vacuum diaphragm is evacuated to vacuum；
Step 5, cover die cover plate, by aeration aperture to die cavity gas injection to pressure be 0.2-3Mpa；
Step 6, mold heating is made into formed product；
Step 7, it demoulds and modifies product.
Preferably, in step 1, before smearing release agent, greasy dirt, water stain and dust also is removed to die ontology
Processing.
Preferably, it smears release agent 2~5 times, is dried after smearing every time, time interval 3 on die ontology surface
~5min.
Preferably, the edge with die ontology of vacuum diaphragm are connect by rubber belt sealing.
Preferably, in step 4, vacuum degree 0.2-100Pa.
Preferably, in step 6,140~160 DEG C of 10~150min of heat preservation are heated to.
Compared with prior art, the invention has the following beneficial technical effects:
Mold of the present invention forms sealing die cavity between die ontology and die cover plate, and on die cover plate
Aeration aperture is set, in use, being inflated by aeration aperture into die cavity, is pressed into product using both air pressure and die ontology
Type, since gas can uniformly be contacted with die ontology, be not present mould machine error the problem of, thus by positive/negative pressure it is poor
That is gas pressure guarantees product pressure uniformity, completely eliminates each face discontinuity institute of product during production
The problem for causing product stability difference improves the molding qualification rate of product.Meanwhile relative to the exhaust in existing mould pressing process,
The present invention is evacuated the gas that can more empty in gap by vacuum pumping hole outward, and effect is more preferable.The present invention solves mould simultaneously
Product initial stage mold investment can be greatly reduced in the tool problem that the development cycle is long, development cost are high, shorten product development week
Phase, the product of preparation have the characteristics that performance it is high, it is apparent it is good, thickness is uniform.Improve Special-shaped battery case product molding efficiency, matter
Amount, can be effectively reduced product cost.
Further, the stepped construction design of die ontology top side wall, vacuum diaphragm is connected and fixed when being easy to use.
Further, safety valve is set, and when the blowing pressure transfinites, safety valve automatically opens exhaust, can protect mold
It is not damaged, and guarantees using safe.
Forming method of the present invention, prepreg lamination and vacuum diaphragm can more be emptied by being evacuated outward by vacuum pumping hole
Gas in gap, effect are more preferable.It is inflated by aeration aperture into die cavity, is suppressed product using both air pressure and die ontology
Molding, to guarantee each face uniform force of product by gas pressure, product is each during completely eliminating production
The problem of product stability difference caused by a face discontinuity, improves the molding qualification rate of product.The method can satisfy multiple
The scale of mass production of condensation material battery case.
Detailed description of the invention
Fig. 1 is schematic diagram when inventive die uses.
Fig. 2 is special-shaped composite material battery case main view prepared by the present invention.
Fig. 3 is special-shaped composite material battery case prepared by the present invention: (a) perspective view, (b) top view.
In figure: 1- mold, 2- prepreg lamination, 3- vacuum pumping hole, 4- vacuum diaphragm, 5- die cover plate, 6- aeration aperture, 7-
Pressure gauge, 8- safety valve.
Specific embodiment
Below with reference to specific embodiment, the present invention is described in further detail, it is described be explanation of the invention and
It is not to limit.
As shown in Figure 1, abnormity composite material battery case molding die of the present invention, including die ontology 1 and mold
Cover board 5；In use, die cover plate 5 is covered on the die cavity for forming sealing at the top of die ontology 1.1 inner surface of die ontology and pre-add
The special-shaped composite material battery box face of work is consistent, and the one side wall of die ontology 1 is equipped with vacuum pumping hole 3.In use, vacuum
Aspirating hole 3 is connect by pump-line with vaccum-pumping equipment, and pump-line is equipped with valve.Die cover plate 5 is equipped with aeration aperture
6, pressure gauge 7 and safety valve 8.Aeration aperture 6 is connect by gas ducting with gas source, and pressure gauge 7 is for detecting die ontology 1 and mould
The pressure in die cavity formed between tool cover board 5.Vaccum-pumping equipment can select vacuum pump.
1 top side wall of die ontology is two-staged step structure, from the outside to the core for the step that highly successively reduces and
Second level ladder, in use, die cover plate 5 contacts sealing with step, second level ladder is for fixing vacuum diaphragm 4.
In one embodiment, prepreg is not laid with when the side wall use of vacuum pumping hole 3 is set.
Forming method of the present invention based on above-mentioned special-shaped composite material battery case molding die, including walk as follows
Suddenly,
Step 1, die treatment: greasy dirt, water stain and dust processing are removed to die ontology 1, in die ontology 1
Surface smear release agent 2~5 times, every time smear after dried, 3~5min of time interval, add up release agent with a thickness of
0.1mm；
Step 2, orderly laying 8-12 layers are carried out on mold using continuous fiber prepreg, forms prepreg lamination 2, in advance
The leaching material non-covering vacuum aspirating hole 3 of lamination 2, special-shaped region is adjusted；
Step 3, it adds auxiliary material: being successively laid with release cloth and vacuum diaphragm 4 on 2 surface of prepreg lamination；Vacuum diaphragm 4 covers very
Empty pump stomata 3, and the edge of vacuum diaphragm 4 is placed on the second level ladder of die ontology 1 and is tightly connected with die ontology 1；
Step 4, it negative pressure system: is evacuated outward with vacuum system from vacuum pumping hole 3, by prepreg lamination 2 and vacuum diaphragm 4
Between gap be evacuated to vacuum 0.2-100Pa；
Step 5, positive pressure system: die cover plate 5 is covered, pours compressed gas to 0.2-3Mpa to die cavity；
Step 6, mould is solid: the mold system having had been prepared for being sent into intermediate temperature setting furnace, is heated to 140~160 DEG C of heat preservations
10~150min；
Step 7, it demoulds and modifies product.
Formed embodiment is as follows.
Embodiment 1
Step 1, it handles mold: carrying out wiping 3 times comprehensively in 1 inner surface of die ontology using release agent, wiped every time
It is dried after, every time wiping interval 5min, release agent cumulative thickness 0.1mm.
Step 2, continuous fiber prepreg overlay: 12 layers of continuous fiber prepreg is selected to be had on 1 surface of die ontology
Sequence laying, cumulative thickness 3mm form prepreg lamination 2.
Step 3, it adds auxiliary material: being successively laid with release cloth and vacuum diaphragm 4, the edge of vacuum diaphragm 4 on 2 surface of prepreg lamination
It is placed on the second level ladder of die ontology 1 and is connect with die ontology 1 by rubber belt sealing.
Step 4, negative pressure system: gap between prepreg lamination 2 and vacuum diaphragm 4 is vacuum-treated, vacuum is evacuated to
0.2pa。
Step 5, positive pressure system: die cover plate 5 is covered, is filled with compressed gas to 1MPa to die cavity.
Step 6, mould is solid: the mold having had been prepared for being sent into intermediate temperature setting furnace, is heated to 140 DEG C of heat preservation 150min.
Step 7, it demoulds and modifies product.
Embodiment 2
Step 1, it handles mold: carrying out wiping 2 times comprehensively in 1 inner surface of die ontology using release agent, wiped every time
It is dried after, every time wiping interval 3min, release agent cumulative thickness 0.1mm.
Step 2, continuous fiber prepreg overlay: 8 layers of continuous fiber prepreg are selected to carry out on 1 surface of die ontology orderly
Laying, cumulative thickness 2mm form prepreg lamination 2.
Step 3, it adds auxiliary material: being successively laid with release cloth and vacuum diaphragm 4, the edge of vacuum diaphragm 4 on 2 surface of prepreg lamination
It is placed on the second level ladder of die ontology 1 and is connect with die ontology 1 by rubber belt sealing.
Step 4, negative pressure system: gap between prepreg lamination 2 and vacuum diaphragm 4 is vacuum-treated, vacuum is evacuated to
50pa。
Step 5, positive pressure system: die cover plate 5 is covered, is filled with compressed gas to 0.7MPa to die cavity.
Step 6, mould is solid: the mold having had been prepared for being sent into intermediate temperature setting furnace, is heated to 150 DEG C of heat preservation 100min.
Step 7, it demoulds and modifies product.
Embodiment 3
Step 1, it handles mold: carrying out wiping 5 times comprehensively in 1 inner surface of die ontology using release agent, wiped every time
It is dried after, every time wiping interval 4min, release agent cumulative thickness 0.1mm.
Step 2, continuous fiber fast curing prepreg laying: select 10 layers of continuous fiber prepreg in 1 table of die ontology
Face carries out orderly laying, and cumulative thickness 2.5mm forms prepreg lamination 2.
Step 3, it adds auxiliary material: being successively laid with release cloth and vacuum diaphragm 4, the edge of vacuum diaphragm 4 on 2 surface of prepreg lamination
It is placed on the second level ladder of die ontology 1 and is connect with die ontology 1 by rubber belt sealing.
Step 4, negative pressure system: gap between prepreg lamination 2 and vacuum diaphragm 4 is vacuum-treated, vacuum is evacuated to
100pa。
Step 5, positive pressure system: die cover plate 5 is covered, is filled with compressed gas to 0.2MPa to die cavity.
Step 6, mould is solid: the mold having had been prepared for being sent into intermediate temperature setting furnace, is heated to 160 DEG C of heat preservation 10min.
Step 7, it demoulds and modifies product.
Embodiment 4
Step 1, it handles mold: carrying out wiping 5 times comprehensively in 1 inner surface of die ontology using release agent, wiped every time
It is dried after, every time wiping interval 4min, release agent cumulative thickness 0.1mm.
Step 2, continuous fiber fast curing prepreg laying: select 10 layers of continuous fiber prepreg in 1 table of die ontology
Face carries out orderly laying, and cumulative thickness 2.5mm forms prepreg lamination 2.
Step 3, it adds auxiliary material: being successively laid with release cloth and vacuum diaphragm 4, the edge of vacuum diaphragm 4 on 2 surface of prepreg lamination
It is placed on the second level ladder of die ontology 1 and is connect with die ontology 1 by rubber belt sealing.
Step 4, negative pressure system: gap between prepreg lamination 2 and vacuum diaphragm 4 is vacuum-treated, vacuum is evacuated to
100pa。
Step 5, positive pressure system: die cover plate 5 is covered, is filled with compressed gas to 2MPa to die cavity.
Step 6, mould is solid: the mold having had been prepared for being sent into intermediate temperature setting furnace, is heated to 160 DEG C of heat preservation 10min.
Step 7, it demoulds and modifies product.
Embodiment 5
Step 1, it handles mold: carrying out wiping 5 times comprehensively in 1 inner surface of die ontology using release agent, wiped every time
It is dried after, every time wiping interval 4min, release agent cumulative thickness 0.1mm.
Step 2, continuous fiber fast curing prepreg laying: select 10 layers of continuous fiber prepreg in 1 table of die ontology
Face carries out orderly laying, and cumulative thickness 2.5mm forms prepreg lamination 2.
Step 3, it adds auxiliary material: being successively laid with release cloth and vacuum diaphragm 4, the edge of vacuum diaphragm 4 on 2 surface of prepreg lamination
It is placed on the second level ladder of die ontology 1 and is connect with die ontology 1 by rubber belt sealing.
Step 4, negative pressure system: gap between prepreg lamination 2 and vacuum diaphragm 4 is vacuum-treated, vacuum is evacuated to
100pa。
Step 5, positive pressure system: die cover plate 5 is covered, is filled with compressed gas to 3MPa to die cavity.
Step 6, mould is solid: the mold having had been prepared for being sent into intermediate temperature setting furnace, is heated to 160 DEG C of heat preservation 10min.
Step 7, it demoulds and modifies product.
Main view, perspective view and the top view for the battery case that the present invention is prepared are respectively such as Fig. 2, Fig. 3 (a) and Fig. 3 (b)
Shown, this is an example of the present invention, can also prepare the battery case of other shapes.
Case the above is only the implementation of the present invention is not intended to limit the scope of the invention, all to utilize this
Equivalent structure described in description of the invention is applied directly or indirectly in other relevant technical fields, and is similarly included in this
In the scope of patent protection of invention.
Claims (10)
1. a kind of abnormity composite material battery case molding die, which is characterized in that including die ontology (1) and die cover plate (5)；
Die ontology (1) inner surface is consistent with the special-shaped composite material battery box face of preprocessing, the one side wall of die ontology (1)
It is equipped with vacuum pumping hole (3)；Die cover plate (5) is equipped with aeration aperture (6) and pressure gauge (7)；
In use, die cover plate (5) is covered at the top of die ontology (1), formed between die ontology (1) and die cover plate (5)
The die cavity of sealing；Vacuum pumping hole (3) is connect by pump-line with vaccum-pumping equipment；Aeration aperture (6) by gas ducting with
Gas source connection, pressure gauge (7) are used to detect the pressure in die cavity.
2. abnormity composite material battery case molding die according to claim 1, which is characterized in that die ontology (1) side
It is two-staged step structure at the top of wall, is from the outside to the core the step and second level ladder that highly successively reduce, in use, mold
Cover board (5) contacts sealing with step, and second level ladder is for fixing release cloth and vacuum diaphragm (4).
3. abnormity composite material battery case molding die according to claim 1, which is characterized in that on die cover plate (5)
It is additionally provided with safety valve (8).
4. abnormity composite material battery case molding die according to claim 1, which is characterized in that pump-line is equipped with
Valve.
5. a kind of abnormity composite material battery case forming method, which is characterized in that based on special-shaped composite wood described in claim 1
Expect battery case molding die, includes the following steps:
Step 1, die ontology (1) inner surface smears release agent；
Step 2, orderly laying is carried out in die ontology (1) inner surface using continuous fiber prepreg, forms prepreg lamination
(2), the non-covering vacuum aspirating hole (3) of prepreg lamination (2)；
Step 3, release cloth and vacuum diaphragm (4) are successively laid on prepreg lamination (2) surface；The pumping of vacuum diaphragm (4) covering vacuum
Hole (3), and the edge of vacuum diaphragm (4) and die ontology (1) are tightly connected；
Step 4, it is evacuated outward from vacuum pumping hole (3), the gap between prepreg lamination (2) and vacuum diaphragm (4) is evacuated to very
It is empty；
Step 5, cover die cover plate (5), by aeration aperture (6) to die cavity gas injection to pressure be 0.2-3Mpa；
Step 6, mold heating is made into formed product；
Step 7, it demoulds and modifies product.
6. abnormity composite material battery case forming method according to claim 5, which is characterized in that in step 1, smearing
Before release agent, greasy dirt, water stain and dust processing also are removed to die ontology (1).
7. abnormity composite material battery case forming method according to claim 5, which is characterized in that in die ontology (1)
Surface is smeared release agent 2~5 times, is dried after smearing every time, 3~5min of time interval.
8. abnormity composite material battery case forming method according to claim 5, which is characterized in that the side of vacuum diaphragm (4)
Edge is connect with die ontology (1) by rubber belt sealing.
9. abnormity composite material battery case forming method according to claim 5, which is characterized in that in step 4, vacuum degree
For 0.2-100Pa.
10. abnormity composite material battery case forming method according to claim 5, which is characterized in that in step 6, heating
To 140~160 DEG C of 10~150min of heat preservation.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811307920.2A CN109177236A (en) | 2018-11-05 | 2018-11-05 | A kind of abnormity composite material battery case molding die and forming method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811307920.2A CN109177236A (en) | 2018-11-05 | 2018-11-05 | A kind of abnormity composite material battery case molding die and forming method |
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| Publication Number | Publication Date |
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| CN109177236A true CN109177236A (en) | 2019-01-11 |
Family
ID=64941857
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
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| CN201811307920.2A Pending CN109177236A (en) | 2018-11-05 | 2018-11-05 | A kind of abnormity composite material battery case molding die and forming method |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110385864A (en) * | 2019-08-27 | 2019-10-29 | 大连理工大学 | A kind of new-energy automobile polymer matrix composites battery case laying forming mold |
| CN116100711A (en) * | 2023-01-19 | 2023-05-12 | 陕西远拓飞航科技有限公司 | Carbon fiber forming die based on silica gel internal die and process thereof |
| CN116945636A (en) * | 2023-09-21 | 2023-10-27 | 山东中恒景新碳纤维科技发展有限公司 | Vacuum suction type prepreg laying method |
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| CN104441689A (en) * | 2014-12-05 | 2015-03-25 | 广州市凯思勒新材料科技有限公司 | RTM molding process suitable for fiber composite material |
| CN104742382A (en) * | 2015-04-10 | 2015-07-01 | 东华大学 | Pressure-assisted VARI (vacuum assisted resin infusion) forming device and method |
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| CN102416700A (en) * | 2011-08-31 | 2012-04-18 | 乔治富 | Production technology of vane used for vertical shaft wind driven generator |
| CN103660317A (en) * | 2013-12-23 | 2014-03-26 | 北京恒吉星科技有限责任公司 | Forming method of quickly formed pipe |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110385864A (en) * | 2019-08-27 | 2019-10-29 | 大连理工大学 | A kind of new-energy automobile polymer matrix composites battery case laying forming mold |
| CN116100711A (en) * | 2023-01-19 | 2023-05-12 | 陕西远拓飞航科技有限公司 | Carbon fiber forming die based on silica gel internal die and process thereof |
| CN116945636A (en) * | 2023-09-21 | 2023-10-27 | 山东中恒景新碳纤维科技发展有限公司 | Vacuum suction type prepreg laying method |
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Application publication date: 20190111 |
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| RJ01 | Rejection of invention patent application after publication |