CN105965916A - Equipment and process for forming composite material - Google Patents
Equipment and process for forming composite material Download PDFInfo
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- CN105965916A CN105965916A CN201610389046.6A CN201610389046A CN105965916A CN 105965916 A CN105965916 A CN 105965916A CN 201610389046 A CN201610389046 A CN 201610389046A CN 105965916 A CN105965916 A CN 105965916A
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- module
- composite material
- control system
- composite
- master control
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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
- B29C70/44—Shaping or impregnating by compression not applied for producing articles of definite length, i.e. discrete articles using isostatic pressure, e.g. pressure difference-moulding, vacuum bag-moulding, autoclave-moulding or expanding rubber-moulding
- B29C70/443—Shaping or impregnating by compression not applied for producing articles of definite length, i.e. discrete articles using isostatic pressure, e.g. pressure difference-moulding, vacuum bag-moulding, autoclave-moulding or expanding rubber-moulding and impregnating by vacuum or injection
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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
- B29C70/54—Component parts, details or accessories; Auxiliary operations, e.g. feeding or storage of prepregs or SMC after impregnation or during ageing
Abstract
The invention discloses equipment for forming a composite material. A master control system is connected with a controller provided for each module via a network, and used for sending running commands to the modules to run the modules; an electromagnetic output module receives the running commands sent by the master control system, and outputs electromagnetically induced current in a pulse mode; an electromagnetic power distribution and heating module distributes the current output by the electromagnetic output module to each heating module, so that the heating module heats a composite material forming mold in a specific combination manner and timing sequence; a pressurizing device is a pressure vessel or a mechanical pressurizing device; the composite material forming mold is placed in the pressurizing device, so that pressure can be exerted on the composite material laid on the composite material forming mold; and a vacuum control module having a vacuuming function is connected with the composite material mold via a pipeline, receives the commands of the master control system, and is used for vacuuming the composite material forming mold. The equipment has the advantages that the curing formation process cycle of the composite material is greatly shortened; and the transportation cost and the energy consumption are reduced.
Description
Technical field
The present invention relates to composites processing technology field, a kind of composite former and the technique for composite wood molding thereof.
Background technology
Along with composite technology application is ripe day by day, composite the most also develops rapidly.In order to meet the demand of composite popularization and application further, large-scale production technology, low cost rapid shaping technique becomes one of focus of current field of compound material.Realize composite low cost rapid shaping, not only to improve from the performance of material own and moulding process, more the equipment preparing composite is researched and developed, transforms, upgraded.
Autoclave, baking oven, forcing press are traditional composite formers, principle is by heating mould ambient heat to mould in thermo-conducting manner, this mode of heating shortcoming is that the heating rate of mould is limited to the heat exchange coefficient of die surface, is limited to again in composite material process planning the heat resistance of the auxiliary material used simultaneously.As a example by classical autoclave, the material weight of equipment inner chamber is far longer than the weight of composite material mould, and therefore plant capacity is very big, and energy consumption is the highest, makes energy consumption cost account for the proportion of composite production cost bigger.It addition, the heating process of autoclave, baking oven, the flowing of the adjoint inner orientation air-flow of needs is to improve heat exchanger effectiveness, but each position resulting in composite material mould is heated uneven, and windward side heat exchange is fast, and lee face is slow, and mould each position temperature difference is big.Owing to being conducted heat by different air-flows between different moulds, the temperature difference between mould is big.Therefore, enter the composite cure process of autoclave, baking oven, need to limit the heating rate upper limit, mould is also had higher requirements, prevents excessive temperature differentials, affect the quality of composite products.Simultaneously; restricted by material interface heat exchange coefficient; and manufacture the restriction of the nonmetal auxiliary material temperature resistant capability of vacuum bag; traditional composite curing molding equipment is difficult to higher heating rate; this makes the composite cure process cycle need a few hours the most tens of hours, and production efficiency is restricted by this, accomplish scale production; equipment investment scale is big, height of splitting the cost.The solidification thermal process of resin is long, the change of performance easily occurs, causes composite products the problems such as defect occur.
By conventional composite materials former ability, limit the development of composite technology.For realizing the solidification of composite low cost rapid shaping, the resin matrix of composite has been carried out substantial amounts of modification, have been achieved for a large amount of achievement, but the research and development of forming technique equipment, curing technology equipment are the most delayed, equipment principle is still set up on the basis of the tradition such as press, baking oven, high energy consumption does not change, and technological process does not has essential change yet.Therefore, with the process costs height of traditional composite former that autoclave represents, power consumption is big, and composite cure cycle is long, and production efficiency is low, and device systems is complicated simultaneously, and construction cost is high.
And forcing press molding, needing negative and positive pairing mould, Making mold is required height, manufacturing cost is high, and mould is thick and heavy, and heat effect district includes the parts of forcing press, and heating material weight is big, and power very greatly, and is difficult in adapt to the manufacture of large scale, relatively complicated shape product.Meanwhile, the equipment such as traditional autoclave, baking oven, forcing press, overall dimensions is far longer than curable composite material parts, is all fixed installation equipment.This results in the curing apparatus of Composites Workshop equipment, it is necessary to regards and can the product size of fertile maximum specification order, and when with big equipment production miscellaneous goods, increases energy consumption further.Meanwhile, complete the composite material shaping mould after molding, need to transport curing apparatus workshop from assembly room, after having solidified, transport go back to assembly room again.If batch production of composite material parts to be realized, transporting substantial amounts of mould, take time and effort, time cost and facility cost are the highest.The most traditional equipment cannot change this production procedure, and therefore in the cost structure of composite material parts, management cost account for bigger proportion.
To sum up.The equipment of traditional heat exchange pattern heating mould, it is difficult to effectively realize composite low cost rapid shaping from efficiency, energy consumption, flow process.
Summary of the invention
The technical problem to be solved is to provide a kind of composite former, effectively realizes composite low cost rapid shaping from efficiency, energy consumption, flow process.
For solving above-mentioned technical problem, the technical scheme is that a kind of composite former, including master control system, temperature measurement module, electromagnetism output module, electromagnetic power distribution heating module, compression module, vacuum control module；
The controller that master control system is each equipped with each module by networking is connected, and each module is sent operating instruction and makes it run；
Temperature measurement module is connected with composite material shaping mould by thermocouple, measures its temperature and is converted into digital quantity to being transferred to master control system；
Electromagnetism output module accepts the operating instruction that master control system sends, output electromagnetic induction electric current in a pulsed fashion；
The electric current that electromagnetism output module exports is assigned to each heating module by electromagnetic power distribution heating module, make each heating module with specific compound mode and time ordered pair composite material shaping mould heat；
Pressue device is pressure vessel or mechanical pressurization device, and composite material shaping mould is placed in pressue device, it is achieved the composite of lay on mould is applied pressure；
Vacuum control module has evacuation function, is connected with composite material mould with pipeline, accepts the instruction of master control system, and mould is carried out evacuation.
As preferably, described pressue device is door-opening pressure vessel, and can be according to the instruction of master control system, pressure vessel is pressurizeed, voltage stabilizing or decompression, electromagnetic power distribution heating module is arranged on inside pressure vessel, and the netting twine of electromagnetic power distribution heating module, power supply all introduce inside pressue device.
As preferably, described vacuum control module is made up of vacuum pump, multi-group vacuum control valve, vacuum control module connects master control system by network, the keying accepting operating control and multi-group vacuum control valve that master control system instruction performs vacuum pump controls, composite material shaping mould is connected with vacuum control module by vacuum hose, it is achieved Pre-Cure Composite is carried out evacuation.
As preferably, described master control system realizes data communication links by Ethernet with temperature measurement module, electromagnetism output module, electromagnetic power distribution heating module, compression module and vacuum control module, and the software of master control system reads the temperature in each region of composite material shaping mould that temperature measurement module records by network.
As preferably, described electromagnetism output module is made up of intermediate frequency power supply and PLC, intermediate frequency power supply operating frequency range 1 ~ 30KHz, PLC is connected with master control system by Ethernet, accept master control system instruction, by the PLC program set, control intermediate frequency power supply is in the specific time, and output sets the electromagnetic pulse of duration.
As preferably, described electromagnetic power distribution heating module, formed by by output switch parameter device and the relay of Ethernet with master control system communication, relay is machinery attracting electric relay or electronic relay, output switch parameter crust of the device is by pneumatic shell, thermal insulation layer and cooler composition, the instruction of master control system is received by the output switch parameter device of Ethernet Yu master control system communication, at the time point required, make corresponding relay adhesive, the electromagnetic pulse making electromagnetism output module export is switched to corresponding heating module, make to be placed in the heating module heating of composite material shaping mould zones of different, realize the mold materials heating in corresponding region, complete the heating to composite material mould.
As preferably, the heating part of described electromagnetic power distribution heating module is electromagnetic induction heating coil, form is one or more in loop coil, planar coil, curved surface coil, the size of coil and the normalized process of sensibility reciprocal, and the coil of the dimensional configurations respective numbers according to composite material mould.
Above-mentioned composite Rapid Thermal press forming device, for the technique of composite wood molding, comprises the following steps:
Step one, on composite material shaping mould, uncured composite is coated with, and at described composite outer cladding vacuum bag；
Step 2, composite material shaping mould is entered pressue device, the heating module on composite material shaping mould is connected with the interface on pressue device；
Step 3, connect vacuum bag on composite material shaping mould with vacuum hose, described vacuum bag is carried out evacuation；
Netting twine on step 4, the composite material shaping mould being coated with by described vacuum bag is connected with network interface on pressue device, and electromagnetism input interface is connected with electromagnetism output module on pressue device；
Step 5, in master control system set solidification temperature, pressure parameter, Electromagnetic Heating parameter, composite material shaping mould is heated by starting device, start solidification；
Step 6, the temperature fed back according to temperature measurement module, to internal inflating pressure, continue solidification process；
After step 7, solidification terminate, product is taken out in pressure release cooling.
Beneficial effects of the present invention:
1, using the mode of electromagnetic induction coil direct action metals mould self-heating, only heating composite material shaping mould itself, other structure of equipment does not produce energy consumption, and therefore energy consumption can be greatly lowered.Quick heating (1 ~ 10 DEG C/min), significantly shortens the composite cure process cycle, has possessed the condition of low cost rapid shaping, adapts to large-scale production.
2, this equipment uses the modular combination set up on the basis of network service, by the adjustment of module on-position, is adapted to the requirement of kinds of processes, it is achieved the multifunction of equipment.Utilize this ability of this equipment, can make the work flow of composite workshop that the biggest change occurs.Traditional work flow, the thermal process of mould will go back to assembly room through logistics transportation after completing in logistics enters the equipment such as autoclave, baking oven again.Utilize this equipment, non-autoclave vacuum bag technique, can not moving mold, complete at molding scene.For large scale product, cost of transportation can be greatly reduced, improve shaping efficiency, ultimately facilitate high efficiency, low cost and produce.
3, the conventional composite materials forming and hardening equipment such as this equipment relatively autoclave, baking oven, press, significantly energy efficient.Composite workshop distribution scale can be made to be substantially reduced, reducing the construction costs, make composite manufacturing process more " green ".
Accompanying drawing explanation
Fig. 1 be electromagnetic power distribution device of the present invention with solenoid be one overall time structural representation.
Fig. 2 is the structural representation of electromagnetic power distribution heating module of the present invention.
Fig. 3 is the electromagnetic power distribution device of the present invention structural representation when being fixedly mounted on internal pressure vessel walls.
Fig. 4 is electromagnetic power distribution device of the present invention and solenoid is an entirety, and two groups be all located at pressue device outside time structural representation.
Detailed description of the invention
Below the technical scheme in the invention embodiment is clearly and completely described, it is clear that described embodiment is only the invention section Example rather than whole embodiments.Based on the embodiment in the invention, the every other embodiment that those of ordinary skill in the art are obtained under not making creative work premise, broadly fall into the scope of the invention protection.
As Figure 1-4, a kind of composite former, including master control system 1, temperature measurement module 2, electromagnetism output module 3, electromagnetic power distribution heating module 4, compression module 5, vacuum control module 6；
The controller that master control system 1 is each equipped with each module by networking is connected, each module is sent operating instruction makes it run, master control system 1 realizes data communication links by Ethernet 7 with temperature measurement module 2, electromagnetism output module 4, electromagnetic power distribution heating module 5, compression module 6 and vacuum control module 6, and the software of master control system 1 reads the temperature in each region of composite material shaping mould 8 that temperature measurement module 2 records by network；
Temperature measurement module 2 is connected with composite material shaping mould 8 by thermocouple, measures its temperature and is converted into digital quantity to being transferred to master control system 1；
Electromagnetism output module 3 accepts the operating instruction that master control system 1 sends, output electromagnetic induction electric current in a pulsed fashion, electromagnetism output module 3 is made up of intermediate frequency power supply and PLC, intermediate frequency power supply operating frequency range 1 ~ 30KHz, PLC is connected with master control system 1 by Ethernet 7, accepts master control system 1 and instructs, by the PLC program set, control intermediate frequency power supply is in the specific time, and output sets the electromagnetic pulse of duration；
Electromagnetic power distribution heating module 4, it is made up of output switch parameter device 401 and the relay 402 communicated with master control system 1 by Ethernet 7, relay 402 is machinery attracting electric relay or electronic relay, output switch parameter device 401 shell is by pneumatic shell 403, thermal insulation layer 404 and cooler 405 form, the output switch parameter device 401 communicated with master control system 1 by Ethernet 7 receives the instruction of master control system 1, at the time point required, make the adhesive of corresponding relay 402, the electromagnetic pulse making electromagnetism output module 3 export is switched to corresponding heating module, make to be placed in the heating module heating of composite material shaping mould 8 zones of different, realize the mold materials heating in corresponding region, complete the heating to composite material mould 8；The heating part of electromagnetic power distribution heating module 4 is electromagnetic induction heating coil 9, form is one or more in loop coil, planar coil, curved surface coil, the size of coil and the normalized process of sensibility reciprocal, and the coil of the dimensional configurations respective numbers according to composite material mould 8；
Pressue device 5 is door-opening pressure vessel, and can be according to the instruction of master control system 1, pressure vessel 5 is pressurizeed, voltage stabilizing or decompression, electromagnetic power distribution heating module 4 is arranged on inside pressure vessel, and the netting twine of electromagnetic power distribution heating module 4, power supply all introduce pressue device 5 inside, composite material shaping mould is placed in pressue device 5, it is achieved the composite of lay on mould is applied pressure；
Vacuum control module 6 is made up of vacuum pump, multi-group vacuum control valve, vacuum control module 6 connects master control system 1 by network, the keying accepting operating control and multi-group vacuum control valve that master control system 1 instruction performs vacuum pump controls, composite material shaping mould 8 is connected with vacuum control module by vacuum hose, it is achieved Pre-Cure Composite is carried out evacuation.
Above-mentioned composite Rapid Thermal press forming device, for the technique of composite wood molding, comprises the following steps:
Step one, on composite material shaping mould, uncured composite is coated with, and at described composite outer cladding vacuum bag；
Step 2, composite material shaping mould is entered pressue device, the heating module on composite material shaping mould is connected with the interface on pressue device；
Step 3, connect vacuum bag on composite material shaping mould with vacuum hose, described vacuum bag is carried out evacuation；
Netting twine on step 4, the composite material shaping mould being coated with by described vacuum bag is connected with network interface on pressue device, and electromagnetism input interface is connected with electromagnetism output module on pressue device；
Step 5, in master control system set solidification temperature, pressure parameter, Electromagnetic Heating parameter, composite material shaping mould is heated by starting device, start solidification；
Step 6, the temperature fed back according to temperature measurement module, to internal inflating pressure, continue solidification process；
After step 7, solidification terminate, product is taken out in pressure release cooling.
The foregoing is only the schematic detailed description of the invention of the present invention, be not limited to the scope of the present invention.Any those skilled in the art, equivalent variations done on the premise of without departing from the design of the present invention and principle and amendment, the scope of protection of the invention all should be belonged to.
Claims (8)
1. a composite former, it is characterised in that: include master control system, temperature measurement module, electromagnetism output module, electromagnetic power distribution heating module, compression module, vacuum control module；
The controller that master control system is each equipped with each module by networking is connected, and each module is sent operating instruction and makes it run；
Temperature measurement module is connected with composite material shaping mould by thermocouple, measures its temperature and is converted into digital quantity to being transferred to master control system；
Electromagnetism output module accepts the operating instruction that master control system sends, output electromagnetic induction electric current in a pulsed fashion；
The electric current that electromagnetism output module exports is assigned to each heating module by electromagnetic power distribution heating module, make each heating module with specific compound mode and time ordered pair composite material shaping mould heat；
Pressue device is pressure vessel or mechanical pressurization device, and composite material shaping mould is placed in pressue device, it is achieved the composite of lay on mould is applied pressure；
Vacuum control module has evacuation function, is connected with composite material mould with pipeline, accepts the instruction of master control system, and mould is carried out evacuation.
A kind of composite former the most according to claim 1, it is characterized in that: described pressue device is door-opening pressure vessel, and can be according to the instruction of master control system, pressure vessel is pressurizeed, voltage stabilizing or decompression, electromagnetic power distribution heating module is arranged on inside pressure vessel, and the netting twine of electromagnetic power distribution heating module, power supply all introduce inside pressue device.
A kind of composite former the most according to claim 1, it is characterized in that: described vacuum control module is made up of vacuum pump, multi-group vacuum control valve, vacuum control module connects master control system by network, the keying accepting operating control and multi-group vacuum control valve that master control system instruction performs vacuum pump controls, composite material shaping mould is connected with vacuum control module by vacuum hose, it is achieved Pre-Cure Composite is carried out evacuation.
A kind of composite former the most according to claim 1, it is characterized in that: described master control system realizes data communication links by Ethernet with temperature measurement module, electromagnetism output module, electromagnetic power distribution heating module, compression module and vacuum control module, the software of master control system reads the temperature in each region of composite material shaping mould that temperature measurement module records by network.
A kind of composite former the most according to claim 1, it is characterized in that: described electromagnetism output module is made up of intermediate frequency power supply and PLC, intermediate frequency power supply operating frequency range 1 ~ 30KHz, PLC is connected with master control system by Ethernet, accept master control system instruction, by the PLC program set, control intermediate frequency power supply is in the specific time, and output sets the electromagnetic pulse of duration.
A kind of composite former the most according to claim 1, it is characterized in that: described electromagnetic power distribution heating module, formed by by output switch parameter device and the relay of Ethernet with master control system communication, relay is machinery attracting electric relay or electronic relay, output switch parameter crust of the device is by pneumatic shell, thermal insulation layer and cooler composition, the instruction of master control system is received by the output switch parameter device of Ethernet Yu master control system communication, at the time point required, make corresponding relay adhesive, the electromagnetic pulse making electromagnetism output module export is switched to corresponding heating module, make to be placed in the heating module heating of composite material shaping mould zones of different, realize the mold materials heating in corresponding region, complete the heating to composite material mould.
A kind of composite former the most according to claim 1, it is characterized in that: the heating part of described electromagnetic power distribution heating module is electromagnetic induction heating coil, form is one or more in loop coil, planar coil, curved surface coil, the size of coil and the normalized process of sensibility reciprocal, and the coil of the dimensional configurations respective numbers according to composite material mould.
A kind of composite former the most according to claim 1, for the technique of composite wood molding, comprises the following steps:
Step one, on composite material shaping mould, uncured composite is coated with, and at described composite outer cladding vacuum bag；
Step 2, composite material shaping mould is entered pressue device, the heating module on composite material shaping mould is connected with the interface on pressue device；
Step 3, connect vacuum bag on composite material shaping mould with vacuum hose, described vacuum bag is carried out evacuation；
Netting twine on step 4, the composite material shaping mould being coated with by described vacuum bag is connected with network interface on pressue device, and electromagnetism input interface is connected with electromagnetism output module on pressue device；
Step 5, in master control system set solidification temperature, pressure parameter, Electromagnetic Heating parameter, composite material shaping mould is heated by starting device, start solidification；
Step 6, the temperature fed back according to temperature measurement module, to internal inflating pressure, continue solidification process；
After step 7, solidification terminate, product is taken out in pressure release cooling.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN201610389046.6A CN105965916A (en) | 2016-06-02 | 2016-06-02 | Equipment and process for forming composite material |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201610389046.6A CN105965916A (en) | 2016-06-02 | 2016-06-02 | Equipment and process for forming composite material |
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| CN105965916A true CN105965916A (en) | 2016-09-28 |
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| CN201610389046.6A Pending CN105965916A (en) | 2016-06-02 | 2016-06-02 | Equipment and process for forming composite material |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106273533A (en) * | 2016-10-10 | 2017-01-04 | 东北林业大学 | A kind of filament wound composite body in-situ solidifying device and method |
| CN107160713A (en) * | 2017-06-27 | 2017-09-15 | 南京航空航天大学 | A kind of autoclave frame-type composite material shaping mould |
| CN114454514A (en) * | 2022-01-28 | 2022-05-10 | 株洲博雅科技股份有限公司 | Busbar hot-pressing process and hot-pressing equipment |
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| US4828472A (en) * | 1983-12-16 | 1989-05-09 | Kawasaki Jukogyo Kabushiki Kaisha | Apparatus for molding and solidifying a resinous composite structure |
| CN103587128A (en) * | 2013-10-15 | 2014-02-19 | 南京航空航天大学 | Method and device for forming high-performance composite material structural member through microwave-pressure tank |
| CN203876246U (en) * | 2014-04-22 | 2014-10-15 | 湖南大学 | High-temperature-resistant composite material production system capable of uniformly heating |
| CN104827613A (en) * | 2015-05-13 | 2015-08-12 | 航天材料及工艺研究所 | Low-cost quick solidifying method for composite material |
| CN104908338A (en) * | 2015-05-22 | 2015-09-16 | 胡春雷 | Electromagnetic induction heating fast-molding equipment for composite material |
| CN205836038U (en) * | 2016-06-02 | 2016-12-28 | 山东中航泰达复合材料股份有限公司 | A kind of composite Rapid Thermal press forming device |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| US4828472A (en) * | 1983-12-16 | 1989-05-09 | Kawasaki Jukogyo Kabushiki Kaisha | Apparatus for molding and solidifying a resinous composite structure |
| CN103587128A (en) * | 2013-10-15 | 2014-02-19 | 南京航空航天大学 | Method and device for forming high-performance composite material structural member through microwave-pressure tank |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN106273533A (en) * | 2016-10-10 | 2017-01-04 | 东北林业大学 | A kind of filament wound composite body in-situ solidifying device and method |
| CN107160713A (en) * | 2017-06-27 | 2017-09-15 | 南京航空航天大学 | A kind of autoclave frame-type composite material shaping mould |
| CN107160713B (en) * | 2017-06-27 | 2019-04-23 | 南京航空航天大学 | A kind of autoclave frame-type composite material shaping mould |
| CN114454514A (en) * | 2022-01-28 | 2022-05-10 | 株洲博雅科技股份有限公司 | Busbar hot-pressing process and hot-pressing equipment |
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Application publication date: 20160928 |
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