CN110722815A - Modularized forming process of light high-strength carbon fiber portable box - Google Patents
Modularized forming process of light high-strength carbon fiber portable box Download PDFInfo
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- CN110722815A CN110722815A CN201911002297.4A CN201911002297A CN110722815A CN 110722815 A CN110722815 A CN 110722815A CN 201911002297 A CN201911002297 A CN 201911002297A CN 110722815 A CN110722815 A CN 110722815A
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- side piece
- box body
- forming process
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Links
- 229920000049 Carbon (fiber) Polymers 0.000 title claims abstract description 34
- 239000004917 carbon fiber Substances 0.000 title claims abstract description 34
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 title claims abstract description 34
- 238000000034 method Methods 0.000 title claims abstract description 34
- 230000008569 process Effects 0.000 title claims abstract description 29
- 238000000748 compression moulding Methods 0.000 claims abstract description 8
- 239000004593 Epoxy Substances 0.000 claims description 16
- 238000001816 cooling Methods 0.000 claims description 9
- 239000000853 adhesive Substances 0.000 claims description 8
- 230000001070 adhesive effect Effects 0.000 claims description 8
- 239000003292 glue Substances 0.000 claims description 7
- 239000004760 aramid Substances 0.000 claims description 6
- 229920003235 aromatic polyamide Polymers 0.000 claims description 6
- 239000003365 glass fiber Substances 0.000 claims description 4
- 239000003795 chemical substances by application Substances 0.000 claims description 3
- 230000002787 reinforcement Effects 0.000 claims description 3
- 230000001105 regulatory effect Effects 0.000 claims description 2
- 230000006835 compression Effects 0.000 claims 1
- 238000007906 compression Methods 0.000 claims 1
- 238000000465 moulding Methods 0.000 abstract description 13
- 230000008439 repair process Effects 0.000 abstract description 2
- 239000004744 fabric Substances 0.000 description 10
- 229920006231 aramid fiber Polymers 0.000 description 6
- 239000011347 resin Substances 0.000 description 6
- 229920005989 resin Polymers 0.000 description 6
- 230000007547 defect Effects 0.000 description 5
- 238000004519 manufacturing process Methods 0.000 description 4
- 238000007789 sealing Methods 0.000 description 4
- 238000003892 spreading Methods 0.000 description 4
- 230000007480 spreading Effects 0.000 description 4
- 238000009434 installation Methods 0.000 description 3
- 239000000463 material Substances 0.000 description 3
- 239000000565 sealant Substances 0.000 description 3
- 238000005034 decoration Methods 0.000 description 2
- 239000000835 fiber Substances 0.000 description 2
- 239000006082 mold release agent Substances 0.000 description 2
- 238000010923 batch production Methods 0.000 description 1
- 239000011248 coating agent Substances 0.000 description 1
- 238000000576 coating method Methods 0.000 description 1
- 238000005056 compaction Methods 0.000 description 1
- -1 flow guide net Substances 0.000 description 1
- 238000002347 injection Methods 0.000 description 1
- 239000007924 injection Substances 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 238000005192 partition Methods 0.000 description 1
- 230000003014 reinforcing effect Effects 0.000 description 1
- 238000007493 shaping process Methods 0.000 description 1
- 238000007711 solidification Methods 0.000 description 1
- 230000008023 solidification Effects 0.000 description 1
- 239000007921 spray Substances 0.000 description 1
Images
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29D—PRODUCING PARTICULAR ARTICLES FROM PLASTICS OR FROM SUBSTANCES IN A PLASTIC STATE
- B29D22/00—Producing hollow articles
- B29D22/003—Containers for packaging, storing or transporting, e.g. bottles, jars, cans, barrels, tanks
-
- 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
- B29C65/00—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor
- B29C65/48—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor using adhesives, i.e. using supplementary joining material; solvent bonding
-
- 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
- B29C70/345—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 using matched moulds
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 modular forming process of a light high-strength carbon fiber portable box, which comprises the following steps: step 1: processing the mould; step 2: layering treatment; and step 3: compression molding; and 4, step 4: adhering and assembling the box body; and 5: assembling the portable box. The product has good surface quality and does not need post-treatment repair by compression molding of double-sided dies of a female die and a male die; the molding process adopts a hot press for pressure molding, the molding pressure can reach 5MPa, and the mechanical strength of the product is high. The method can solve the problems that in the vacuum diversion molding process, a molding die is a single-sided die, the surface quality of a product is poor, and a large amount of post-treatment repairing work is required; through vacuumizing and pressurizing, the vacuum pressure is less than the forming pressure and can only reach 0.1MPa, the mechanical strength of the product is not high, and the problems that the product is scrapped due to the fact that air leakage points are easily generated during vacuumizing and the like are solved.
Description
Technical Field
The invention relates to the field of carbon fiber products, in particular to a modular forming process of a light high-strength carbon fiber portable box.
Background
At present, carbon fiber box products with complex structures are integrally formed by adopting a vacuum flow guide process. The vacuum flow guide forming process includes spreading a plurality of layers of carbon fiber fabrics on a single-face forming die, spreading a layer of demolding cloth on the surface of the carbon fiber fabrics, spreading a flow guide net on the demolding cloth, spreading a rubber pipe on the flow guide net, completely wrapping the inner side of the whole die by using a high-strength film, sealing the joint by using a sealing rubber strip, vacuumizing, and guiding resin to enter the die to impregnate the carbon fiber fabrics by virtue of negative pressure formed by vacuumizing. And (4) after the diversion is finished, carrying out curing operation, and finally demoulding and finishing.
The process has the following defects in the production of forming complex carbon fiber box products:
(1) the process flow is complicated, and a large amount of manual operation is needed, so that the molding period of the product is long, and the requirement of batch production cannot be met.
(2) The carbon fiber fabric is difficult to lay, gaps are easy to remain between layers, compaction cannot be achieved, and the strength defect of the product is caused.
(3) The sealing device is prone to produce air leakage points, resulting in insufficient vacuum pressure.
(4) The resin diversion period is long, the resin content of the product is high, and the glue injection quality is not easy to control.
(5) The molding pressure can only reach 0.1MPa, and the mechanical strength of the product is not high.
(6) The forming die is a single-sided die, the surface of a product contacted with the flow guide net has poor surface quality, and a large amount of post-treatment repairing work is required.
(7) The auxiliary materials required in the forming process are more, including demoulding cloth, flow guide net, rubber tube, high-strength film, 3M spray glue and the like, and the production cost is increased.
(8) The vacuum diversion has higher requirements on operators, and the vacuum diversion is in direct contact with carbon fiber fabrics and diversion resin, so that the pollution to personnel and environment is serious.
Disclosure of Invention
The purpose of the invention is as follows: the invention aims to solve the technical problem of providing a modular forming process of a light high-strength carbon fiber portable box aiming at the defects of the prior art.
In order to solve the technical problem, the invention discloses a modular forming process of a light high-strength carbon fiber portable box, which comprises the following steps:
step 1: processing the mould;
step 2: layering treatment;
and step 3: compression molding;
and 4, step 4: adhering and assembling the box body;
and 5: assembling the portable box.
In the invention, a split compression molding process is adopted, an upper side piece, a lower side piece, a left side piece and a right side piece are respectively arranged on a box body, a mold comprises a female mold and a male mold, in the step 1, a mold release agent is coated on the inner cavity of the mold for 3 times, and the interval time of each time is 10 minutes; and then placing the die on a hot press for preheating, and taking out the die when the temperature of the die reaches 60 ℃.
In the invention, in step 2, carbon fiber prepreg, aramid prepreg, glass fiber prepreg, aramid prepreg and carbon fiber prepreg are sequentially laid on the die concave die after each piece is cut, and the aramid prepreg is used for local reinforcement at the edges and edges. The prepreg is used for carrying out paving molding of the box body, the operation is simple, the layers are easy to laminate, the curing speed is high, other auxiliary materials are avoided, the prepreg is not in contact with fibers and resin, the defects that the process flow is complicated in the vacuum diversion molding, the manual operation difficulty is high, carbon fiber fabrics are difficult to lay, gaps are easy to leave between the layers, the molding period is long, the number of required auxiliary materials is large, the prepreg is in direct contact with the fiber fabrics and the diversion resin, and the pollution to personnel and the environment is serious can be solved.
In the invention, in step 3, all the layered split molds are closed; pressurizing to 2.5MPa by using a hot press and maintaining the pressure; and (3) regulating the temperature of the hot press to 125 ℃, pressurizing to 5MPa, standing for 15 seconds, then releasing pressure, repeating the operation for 3-5 times, pressurizing to 5MPa, maintaining the pressure for 1.5 hours, cooling the die to 60 ℃, and demolding to obtain each partition of the box body and the box cover respectively. The product has good surface quality and does not need post-treatment repair by compression molding of double-sided dies of a female die and a male die; the forming process does not need to be vacuumized; the molding pressure can reach 5MPa, and the mechanical strength of the product is high. The problem that a large amount of post-treatment repairing work is needed because the forming die in the vacuum diversion forming is a single-sided die can be solved; through vacuumizing and pressurizing, the forming pressure can only reach 0.1MPa, the mechanical strength of the product is not high, and the vacuumizing easily generates air leakage points to cause the defects of product scrapping and the like.
In the invention, in step 4, a layer of epoxy structural adhesive is uniformly coated on the split pieces, and quick and accurate positioning and assembly are realized through the embedded screws on the left and right side pieces of the box body and the openings on the upper and lower side pieces of the box body; and (3) curing the adhesive glue at the temperature of 60 ℃ for 0.5 hour, and cooling to room temperature to obtain the assembled portable box body.
In the invention, in step 5, the box cover is connected to the box body through the twist lock, and the handle is arranged on the box body through the embedded screw in the handle.
Drawings
The foregoing and/or other advantages of the invention will become further apparent from the following detailed description of the invention when taken in conjunction with the accompanying drawings.
FIG. 1 is a schematic view of a box structure;
FIG. 2 is a schematic view of a modular mold;
FIG. 3 is a schematic view of the left side panel being connected to the upper side panel;
FIG. 4 is a schematic view of a twist lock connection;
fig. 5 is a flow chart of a box forming process.
Detailed Description
Example (b):
the invention provides a modular forming process of a light high-strength carbon fiber portable box, which is designed according to the following design thought:
and (3) forming design of the box body:
as shown in fig. 1 and 3, in fig. 1, a left side piece 1, a right side piece 2, an upper side piece 3, a lower side piece 4, an L-shaped flanging structure 5, a box cover 6, a twist lock 7 and a handle 8, in fig. 3, a screw 9 and an adhesive 10 are embedded, in order to realize the modular forming of the box body, the box body is divided into 4 parts, namely the left side piece, the right side piece, the upper side piece and the lower side piece, the size of the box body is 573 × 397 mm, the size of the left side piece and the right side piece is 573 × 249 × 19mm, the size of the upper side piece and the lower side piece is 573 × 570 × 83mm, and the dividing position is selected at a side step of the box body to ensure that the appearance quality is good when the sub-pieces are spliced and formed; the left and right side pieces are provided with L-shaped flanging structures at the splitting positions, so that the L-shaped flanging structures can be firmly clamped with the upper side piece and the lower side piece, the bonding area is increased, and the bonding strength is improved.
As shown in fig. 3, the upper portion of the upper side plate 3 is an L-shaped flanging structure 5, a gap is reserved, so that the left side plate 1 can be tightly attached to keep the thickness consistent, and the embedded screw 9 on the left side plate 1 penetrates through the L-shaped flanging structure 5 to be fixedly connected, so that the left side plate 1 and the upper side plate 3 can be fixedly connected.
Designing a combined splicing mold:
as shown in fig. 2, in order to realize the series production of the box body, the forming dies of the left side piece and the right side piece are designed into a combined splicing die, namely, the center of the die is fixed in size, and the two sides of the center die are symmetrically spliced, so that the series production of the box bodies with different height sizes is realized.
In the design of the forming laying layer:
in practical application, the carbon fiber portable box is easily influenced by impact and vibration mechanics, so that the rigidity and toughness of the box body need to be enhanced through layer laying design. The specific ply design is as follows: the laying design is that 0.6mm thick T700 type 3K twill woven carbon fiber/epoxy prepreg, 0.3mm thick aramid fiber/epoxy woven prepreg, 0.3mm thick glass fiber/epoxy woven prepreg, 0.3mm thick aramid fiber/epoxy woven prepreg, 0.6mm thick T700 type 3K twill woven carbon fiber/epoxy prepreg are laid on a female die in sequence, and aramid fiber/epoxy woven prepreg with good toughness is used for local reinforcement at edges and corners.
Designing a molding process:
firstly, coating a release agent on the surface of a mould, placing the mould on a hot press, laying layers when the mould is preheated to 60 ℃, and pressurizing to 2.5MPa by using the hot press after laying layers; and (3) after the temperature is raised to 125 ℃, pressurizing to 5MPa, standing for 15 seconds, then decompressing, repeatedly operating for 3-5 times, pressurizing to 5MPa, maintaining the pressure for 0.5 hour, then cooling the die, cooling to 60 ℃, and demolding to obtain the product.
And (3) bonding and assembling of the box body:
after each lateral plate of box is the shaping respectively, evenly coat one deck epoxy structure on the L shape flange structure of left and right lateral plate and glue, the quick accurate positioning assembly is realized through the pre-buried screw of left and right lateral plate of box and the trompil of lateral plate about the box to pressurize the bonding face through the nut fastening, saved one set of bonding and glued solidification centre gripping frock when guaranteeing bonding strength. And curing the adhesive glue at 60 ℃ for 0.5 hour or curing at room temperature for 6 hours, and cooling to room temperature to obtain the assembled portable box body.
Assembling and forming the portable box:
the rotary lock of the case cover is installed as shown in fig. 4, the rotary lock 7 is located outside the installation hole and fixed with the case cover 6 by using a fastening nut 11, and the bolt 12 is installed inside the case cover 6 and fixed by using a fastening nut 13.
After the box cover is formed, the box cover is connected with the box body through a twist lock; the handle and the box body are formed by installing embedded screws and the box body, and finally the carbon fiber portable box is obtained.
Specifically, a flow chart of a molding process of the light high-strength carbon fiber portable box is shown in fig. 5:
the method comprises the following steps:
step 1: processing the mould;
step 2: layering treatment;
and step 3: compression molding;
and 4, step 4: adhering and assembling the box body;
and 5: assembling the portable box.
The method comprises the following specific steps:
1. processing the forming die:
the mold used in the present invention was a metal upper and lower mold, and the mold release agent was applied 3 times with an interval of 10 minutes before use. And (3) placing the mold coated with the release agent on a hot press for preheating, and taking out the mold when the temperature of the mold reaches 60 ℃.
2. A layering process:
and sequentially laying T700 type 3K twill woven carbon fiber/epoxy prepreg, aramid fiber/epoxy woven prepreg, glass fiber/epoxy woven prepreg, aramid fiber/epoxy woven prepreg and T700 type 3K twill woven carbon fiber/epoxy prepreg on the die cavity die after each piece is formed, and locally reinforcing the edges and edges by using the aramid fiber/epoxy woven prepreg.
3. Compression molding:
closing the split dies after layering is finished, pressurizing to 2.5MPa by using a hot press, and maintaining the pressure; and adjusting the hot press, increasing the temperature to 125 ℃, increasing the pressure to 5MPa, staying for 15 seconds, then releasing the pressure, repeatedly operating for 3-5 times, increasing the pressure to 5MPa, maintaining the pressure for 1.5 hours, then cooling the die, reducing the temperature to 60 ℃, demolding, and respectively obtaining each piece of the box body and the box cover.
4. And (3) bonding and assembling of the box body:
after each lateral plate of the box body is formed respectively, a layer of epoxy structural adhesive is uniformly coated on the L-shaped flanging structures of the left and right lateral plates, and quick and accurate positioning assembly is realized through the embedded screws of the left and right lateral plates of the box body and the holes of the upper and lower lateral plates of the box body. And then, curing the adhesive glue for 0.5 hour or 6 hours at the room temperature at the temperature of 60 ℃, and cooling to the room temperature to obtain the assembled portable box body.
5. Assembling and forming the portable box:
after the box cover is formed, the box cover is connected with the box body through the twist lock, and when the twist lock is installed, the fastening piece is provided with sealant so as to guarantee the sealing performance of the box body.
When the handle is installed, the embedded screws in the handle penetrate through the box body installation holes, so that the handle is installed in place quickly and accurately, the nut cap is used for fastening the inside of the box body, the handle and the contact surface of the box body are coated with sealant, and the excessive sealant is cleaned after installation.
The invention provides a thought and a method for a modular forming process of a light-weight high-strength carbon fiber portable box, and a method and a way for realizing the technical scheme are many, the above description is only a preferred embodiment of the invention, and it should be noted that, for a person skilled in the art, a plurality of improvements and decorations can be made without departing from the principle of the invention, and the improvements and decorations should also be regarded as the protection scope of the invention. All the components not specified in the present embodiment can be realized by the prior art.
Claims (6)
1. The modular forming process of the light high-strength carbon fiber portable box is characterized by comprising the following steps of:
step 1: processing the mould;
step 2: layering treatment;
and step 3: compression molding;
and 4, step 4: adhering and assembling the box body;
and 5: assembling the portable box.
2. The modular forming process of the light high-strength carbon fiber portable box as claimed in claim 1, characterized in that a split-piece compression forming process is adopted, the box body is respectively provided with an upper side piece, a lower side piece, a left side piece and a right side piece, the die comprises a female die and a male die, in the step 1, a release agent is coated on the inner cavity of the die for 3 times, and the interval time of each time is 10 minutes; and then placing the die on a hot press for preheating, and taking out the die when the temperature of the die reaches 60 ℃.
3. The modular forming process of the light-weight high-strength carbon fiber portable box according to claim 1, characterized in that in the step 2, carbon fiber prepreg, aramid prepreg, glass fiber prepreg, aramid prepreg and carbon fiber prepreg are sequentially laid on a die cavity, and the aramid prepreg is used for local toughening and reinforcement.
4. The modular forming process of the light-weight high-strength carbon fiber portable box according to claim 1, wherein in the step 3, all split molds after being layered are closed; pressurizing to 2.5MPa by using a hot press and maintaining the pressure; and (3) regulating the temperature of the hot press to 125 ℃, pressurizing to 5MPa, stopping for 15 seconds, then releasing pressure, repeating the operation for 3-5 times, pressurizing to 5MPa, maintaining the pressure for 1.5 hours, cooling the die to 60 ℃, and demolding to obtain an upper side plate, a lower side plate, a left side plate, a right side plate and a box cover of the box body respectively.
5. The modular forming process of the light high-strength carbon fiber portable box is characterized in that in the step 4, a layer of epoxy structural adhesive is uniformly coated on the upper side piece, the lower side piece, the left side piece and the right side piece, and rapid and accurate positioning and assembly are realized through embedded screws of the left side piece and the right side piece of the box body and openings of the upper side piece and the lower side piece of the box body; and (3) curing the adhesive glue at the temperature of 60 ℃ for 0.5 hour, and cooling to room temperature to obtain the assembled portable box body.
6. The modular forming process of the light-weight high-strength carbon fiber portable box is characterized in that in the step 5, the box cover is connected to the box body through the twist lock, and the handle is installed on the box body through the embedded screws in the handle.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911002297.4A CN110722815A (en) | 2019-10-21 | 2019-10-21 | Modularized forming process of light high-strength carbon fiber portable box |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911002297.4A CN110722815A (en) | 2019-10-21 | 2019-10-21 | Modularized forming process of light high-strength carbon fiber portable box |
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| Publication Number | Publication Date |
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| CN110722815A true CN110722815A (en) | 2020-01-24 |
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| CN201911002297.4A Pending CN110722815A (en) | 2019-10-21 | 2019-10-21 | Modularized forming process of light high-strength carbon fiber portable box |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106273553A (en) * | 2015-06-10 | 2017-01-04 | 天津工业大学 | A kind of linen prepreg and composite material and preparation method thereof |
| CN107283875A (en) * | 2017-06-27 | 2017-10-24 | 东莞市海旭新材料技术有限公司 | It is a kind of based on can thermoplastic fibre composite case and bag and preparation method thereof |
| CN108990333A (en) * | 2018-06-25 | 2018-12-11 | 山西平阳重工机械有限责任公司 | Composite material cabinet and its moulding technique |
| CN110181833A (en) * | 2019-05-29 | 2019-08-30 | 郝鹏翔 | A kind of lightweight prepreg battery case and preparation method thereof |
-
2019
- 2019-10-21 CN CN201911002297.4A patent/CN110722815A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106273553A (en) * | 2015-06-10 | 2017-01-04 | 天津工业大学 | A kind of linen prepreg and composite material and preparation method thereof |
| CN107283875A (en) * | 2017-06-27 | 2017-10-24 | 东莞市海旭新材料技术有限公司 | It is a kind of based on can thermoplastic fibre composite case and bag and preparation method thereof |
| CN108990333A (en) * | 2018-06-25 | 2018-12-11 | 山西平阳重工机械有限责任公司 | Composite material cabinet and its moulding technique |
| CN110181833A (en) * | 2019-05-29 | 2019-08-30 | 郝鹏翔 | A kind of lightweight prepreg battery case and preparation method thereof |
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