CN110815869A - Forming system and forming method of carbon fiber prepreg product - Google Patents

Forming system and forming method of carbon fiber prepreg product Download PDF

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Publication number
CN110815869A
CN110815869A CN201911212503.4A CN201911212503A CN110815869A CN 110815869 A CN110815869 A CN 110815869A CN 201911212503 A CN201911212503 A CN 201911212503A CN 110815869 A CN110815869 A CN 110815869A
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CN
China
Prior art keywords
carbon fiber
cooling water
die
heat exchange
mold
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CN201911212503.4A
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Chinese (zh)
Inventor
栾润明
郑昌军
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Changzhou Manqiwei Rail Transit Equipment Co Ltd
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Changzhou Manqiwei Rail Transit Equipment Co Ltd
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Priority to CN201911212503.4A priority Critical patent/CN110815869A/en
Publication of CN110815869A publication Critical patent/CN110815869A/en
Pending legal-status Critical Current

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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
    • 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
    • B29C33/02—Moulds or cores; Details thereof or accessories therefor with incorporated heating or cooling means
    • B29C33/04—Moulds or cores; Details thereof or accessories therefor with incorporated heating or cooling means using liquids, gas or steam
    • 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
    • B29C33/02—Moulds or cores; Details thereof or accessories therefor with incorporated heating or cooling means
    • B29C33/04—Moulds or cores; Details thereof or accessories therefor with incorporated heating or cooling means using liquids, gas or steam
    • B29C33/048—Moulds or cores; Details thereof or accessories therefor with incorporated heating or cooling means using liquids, gas or steam using steam
    • 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
    • B29C33/20—Opening, closing or clamping
    • B29C33/22—Opening, closing or clamping by rectilinear movement
    • B29C33/24—Opening, closing or clamping by rectilinear movement using hydraulic or pneumatic 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
    • B29C33/00—Moulds or cores; Details thereof or accessories therefor
    • B29C33/44—Moulds or cores; Details thereof or accessories therefor with means for, or specially constructed to facilitate, the removal of articles, e.g. of undercut articles
    • 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
    • B29C2791/00—Shaping characteristics in general
    • B29C2791/004—Shaping under special conditions
    • B29C2791/006—Using vacuum
    • 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
    • B29L2031/3064—Trains
    • 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
    • B29L2031/3076—Aircrafts

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Chemical & Material Sciences (AREA)
  • Composite Materials (AREA)
  • Moulding By Coating Moulds (AREA)
  • Reinforced Plastic Materials (AREA)

Abstract

The invention relates to a forming system and a forming method of a carbon fiber prepreg product, the forming system of the carbon fiber prepreg product comprises a die assembly oil cylinder, a die, a pull rod arranged in parallel, and a fixed turning plate fixedly arranged at the front end of the pull rod, wherein a movable turning plate in sliding fit with the pull rod is arranged on the pull rod, the die assembly oil cylinder is in transmission fit with the movable turning plate through a crank connecting rod, the die comprises a movable die and a fixed die which are matched, the fixed die is fixedly arranged on the fixed turning plate, the movable die is fixedly arranged on the movable turning plate so that the movable die can be close to or far away from the fixed die when the movable turning plate moves, an ejection oil cylinder is arranged on the movable turning plate, and a piston rod of the ejection oil cylinder extends into the movable die so that.

Description

Forming system and forming method of carbon fiber prepreg product
Technical Field
The invention relates to preparation of carbon fiber products, in particular to a forming system and a forming method of a carbon fiber prepreg product.
Background
In recent years, urban public transport in China develops rapidly, and vehicles such as subways, light rails and high-speed rails are used as important components of urban transport, and have the advantages of large passenger capacity, high speed, safety, punctuality, energy conservation, environmental protection and the like. With the continuous improvement of living standard of people, people have new requirements on the comfort and the safety of the rail transit vehicles.
The carbon fiber reinforced advanced composite material has the advantages of high specific strength, high specific rigidity, designability of material performance and the like. Due to the advantages, the composite material has been widely applied in the field of aviation. The use of advanced composite materials in aircraft structures, whether military or civilian aircraft, is increasing to improve aircraft performance and efficiency.
The composite material is 'golden decade' developed in the high-speed railway industry of China in recent 10 years, and in order to be matched with the high-speed railway, light rails, urban rails, subways and other industries, the light-weight high-strength carbon fiber reinforced advanced composite material technology and products are completely matched from a blank to a complete set, and the raw material selection, the structural design, the process forming and other aspects are comprehensively improved. The preparation application and the preparation method of the thermoplastic prepreg products reinforced by the continuous carbon fiber filaments, the carbon fiber two-dimensional fabrics and the three-dimensional fabrics are in a relatively lagging level, the prior art can only form products of plate type or products without complex curved surface deformation, but has no good solution for the carbon fiber reinforced thermoplastic products with highlight and highlight requirements and the carbon fiber reinforced thermoplastic products with complex curved surface deformation, the surfaces of the formed products are rough, other modes such as spray painting and finishing are needed to change the surface effect, and only the plate type products can be formed but the products with complex shape change can not be formed.
Disclosure of Invention
The invention aims to provide a system and a method for molding a carbon fiber prepreg product, which have the advantages of simple structure, high automation degree and slip prevention.
In order to solve the technical problem, the forming system of the carbon fiber prepreg product comprises a die assembly oil cylinder, a die, a pull rod arranged in parallel and a fixed turning plate fixedly arranged at the front end of the pull rod, wherein a moving turning plate in sliding fit with the pull rod is arranged on the pull rod, the die assembly oil cylinder is in transmission fit with the moving turning plate through a bent elbow connecting rod, the die comprises a movable die and a fixed die which are matched, the fixed die is fixedly arranged on the fixed turning plate, the movable die is fixedly arranged on the moving turning plate so that the movable die can be close to or far away from the fixed die when the moving turning plate moves, an ejection oil cylinder is arranged on the moving turning plate, and a piston rod of the ejection oil cylinder extends into the movable die so that a product in the die is pushed away from the movable die when.
Further, the molding system of carbon fiber prepreg product still includes quick heat-cycle system, set up the heat transfer pipeline in cover half, the movable mould, quick heat-cycle system includes electric heat steam generator, and electric heat steam generator communicates with each other through the heat transfer pipeline that steam conduit with, sets up steam inlet valve on the steam conduit to make in the steam that electric heat steam generator produced can get into the heat transfer pipeline, carry out rapid heat transfer.
Furthermore, the forming system of the carbon fiber prepreg product also comprises a cooling water recovery device, the outlet end of the heat exchange pipeline is communicated with the cooling water recovery device through a water outlet pipeline, and a cooling water outlet valve is arranged on the water outlet pipeline, so that water vapor after heat exchange in the heat exchange pipeline enters the cooling water recovery device.
Furthermore, the molding system of carbon fiber prepreg product still includes the cooling tower, the cooling tower communicates with each other with heat transfer pipeline through cooling tube, and the last series connection of cooling tube sets up booster pump and cooling water inlet valve for let in cooling water in to heat transfer pipeline.
Further, the molding system of carbon fiber prepreg product still includes the air compressor machine, the air compressor machine communicates with each other with heat transfer pipeline through air conduit, sets up the air valve on the air conduit for let in compressed air in to heat transfer pipeline.
Furthermore, the cooling water recovery device is communicated with the cooling tower through a recovery pipeline, so that water recovered by the cooling water recovery device can enter the cooling tower.
Furthermore, the forming system of the carbon fiber prepreg product also comprises a water storage tank, the water storage tank is communicated with the electric heating steam generator through a water storage pipeline, and the water storage pipeline is provided with a water storage booster pump for pumping water in the water storage tank into the electric heating steam generator.
And further, the molding system of the carbon fiber prepreg product further comprises a vacuum pumping system, and the vacuum pumping system is used for carrying out vacuum pumping and pressure maintaining on the inside of the mold after the movable mold and the fixed mold are closed.
Further, the molding system of carbon fiber prepreg product still includes the PLC the control unit, set up temperature sensor in the cover half, temperature sensor, steam inlet valve, store water booster pump, cooling water inlet valve, cooling water outlet valve, air valve and PLC the control unit electric connection to make PLC the control unit can select to input steam, or cooling water, or air pressure gas in the heat transfer pipeline according to the temperature information of temperature sensor feedback.
A molding method of a carbon fiber prepreg product comprises the following steps:
A. and heating the thermoplastic prepreg reinforced by the continuous carbon fiber filaments, the carbon fiber two-dimensional fabric and the three-dimensional fabric through an infrared heating box, so that the thermoplastic prepreg reinforced by the continuous carbon fiber filaments, the carbon fiber two-dimensional fabric and the three-dimensional fabric is softened and reaches a state of plastic deformation.
B. And (3) placing the preheated continuous carbon fiber filament, the carbon fiber two-dimensional fabric and the three-dimensional fabric reinforced thermoplastic prepreg blank into a mold, moving the movable mold by the action of a mold closing oil cylinder, and closing the mold.
C. When the mold enters a heating stage of rapid thermal cycle, starting an electric heating steam generator and opening a steam inlet valve to enable the generated high-temperature steam to enter a heat exchange pipeline of the mold for heating; and meanwhile, a cooling water outlet valve is opened, so that cooling water formed after heat exchange enters the cooling water recovery device.
D. The temperature sensor detects the temperature in the die and feeds the temperature back to the PLC control unit, and the PLC control unit closes the electric heating steam generator and the steam inlet valve after judging that the heating is finished.
E. Vacuumizing the mould, and removing air in the mould cavity; and pressurizing the mold cavity at a set pressure.
F. And starting the booster pump and opening the cooling water inlet valve to enable cooling water in the cooling tower to enter a heat exchange pipeline of the mold for water cooling, and opening the cooling water outlet valve to enable the cooling water to enter the cooling water recovery device for recycling.
G. The temperature sensor detects the temperature in the die and feeds the temperature back to the PLC control unit, and the PLC control unit closes the booster pump and the cooling water inlet valve after judging that the cooling is finished.
H. Starting the air compressor and opening the air valve, allowing high-pressure gas in the air compressor to enter the heat exchange pipeline, and discharging residual water in the heat exchange pipeline to prepare for the next cycle period.
I. The die assembly oil cylinder drives the movable die to move, so that the movable die is separated from the fixed die, and meanwhile, the ejection oil cylinder is started to push a product formed in the die to be separated from the movable die and take out the product from the fixed die.
The invention has the technical effects that: (1) compared with the prior art, the forming system of the carbon fiber prepreg product adopts the matching of the ejection oil cylinder and the die assembly oil cylinder, so that when the movable die is separated from the fixed die, the ejection oil cylinder pushes the product to be separated from the movable die, and the separation speed of the product and the die is accelerated; (2) the die is driven by the die closing oil cylinder, so that the die is stable, reliable and easy to control; (3) the rapid heat circulation system is arranged, so that the surface of the product after the product is molded is in a highlight state, and subsequent processes such as surface treatment, paint spraying and the like are not needed; the defects of welding marks, flow marks, silver marks, floating fibers and the like on the surface of the product are overcome, the surface quality of the plastic part is improved, secondary processing procedures such as polishing and spraying are eliminated, the production flow of the product is effectively shortened, the production cost and energy consumption are reduced, and the environmental pollution is reduced; (4) according to the complexity of the shape of the product, a mold with any complexity can be designed to form the product with more complex deformation, and the toughness of the carbon fiber thermoplastic product is greatly improved compared with that of the carbon fiber thermosetting product; (5) the molding system has low investment cost, the molding period is 5-10min, and the method is greatly improved compared with the prior art.
Drawings
The invention is described in further detail below with reference to the drawings of the specification:
FIG. 1 is a schematic structural view of a molding system for a carbon fiber prepreg product of the present invention;
FIG. 2 is a schematic diagram of the construction of the rapid thermal cycle system of the present invention;
FIG. 3 is a schematic structural view of a carbon fiber prepreg riser sheet of the present invention;
fig. 4 is a flowchart of a method of molding a carbon fiber prepreg product of the present invention.
In the figure: the device comprises a die assembly oil cylinder 1, a die adjusting nut 2, a rear turning plate 3, a pull rod 4, a toggle connecting rod 5, a movable turning plate 6, a fixed turning plate 7, an ejection oil cylinder 8, a die 9, a temperature sensor 10, a cooling tower 11, a cooling water recovery device 12, a booster pump 13, a cooling water inlet valve 14, a cooling water outlet valve 15, an air compressor 16, an air valve 17, an electrothermal steam generator 18, a steam inlet valve 19, a water storage booster pump 20, a water storage tank 21, a PLC control unit 22, a fixed die 23, a movable die 24 and a carbon fiber prepreg vertical cover plate 25.
Detailed Description
Example 1
As shown in fig. 1, the molding system of a carbon fiber prepreg product of this embodiment includes a mold closing cylinder 1, a mold 9, four tie rods 4 arranged in parallel, and a fixed turning plate 7 fixedly disposed at the front ends of the tie rods 4, the fixed turning plate 7 is fixed at the front ends of the tie rods 4 by welding, a moving turning plate 6 in sliding fit with the tie rods 4 is further disposed on the tie rods 4, the moving turning plate 6 and the fixed turning plate 7 are arranged in parallel, the mold 9 includes a moving mold 24 and a fixed mold 23 which are matched, wherein the fixed mold 23 is fixedly disposed on the fixed turning plate 7 by means of bolt connection, and the moving mold 24 is fixedly disposed on the moving turning plate 6 by means of bolt connection, so as to facilitate replacement of the fixed mold 23 and the moving; the forming system of the carbon fiber prepreg product further comprises a rear turning plate 3 and a mold adjusting nut 2, the tail end of each pull rod 4 is provided with an external thread, four corners of the rear turning plate 3 are sleeved at the tail end of each pull rod 4, the rear turning plate 3 is arranged in parallel with the movable turning plate 6 and the fixed turning plate 7, and the mold adjusting nuts 2 are arranged on two sides of the rear turning plate 3, so that the position of the rear turning plate 3 can be fixed; a die-closing oil cylinder 1 is arranged in the center of the rear turning plate 3, a toggle connecting rod 5 is arranged between the rear turning plate 3 and the movable turning plate 6, a piston rod of the die-closing oil cylinder 1 penetrates through the rear turning plate 3 and is in transmission fit with the rear end of the toggle connecting rod 5, and the front end of the toggle connecting rod 5 is in transmission fit with the movable turning plate 6, so that the die-closing oil cylinder 1 can push the movable turning plate 6 to move through the toggle connecting rod 5, and further, a movable die 24 is driven to be close to or far away from the fixed; an ejection oil cylinder 8 is arranged at the center of the movable turning plate 6, and a piston rod of the ejection oil cylinder 8 extends into the movable mold 24, so that the ejection oil cylinder 8 pushes the product in the mold 9 away from the movable mold 24 when the movable mold 24 leaves the fixed mold 23.
Example 2
On the basis of embodiment 1, the molding system of the carbon fiber prepreg product of the embodiment has the following deformation that the fixed mold 23 and the movable mold 24 are both provided with spacer sleeves, heat exchange pipelines for heating or cooling the product are arranged in the spacer sleeves, and the heat exchange pipelines are uniformly distributed on the periphery of the product after the fixed mold 23 and the movable mold 24 are sealed; as shown in fig. 2, the forming system of the carbon fiber prepreg product further includes a rapid thermal cycle system, the rapid thermal cycle system includes an electrothermal steam generator 18, the electrothermal steam generator 18 is communicated with the heat exchange pipe through a steam pipe, and a steam inlet valve 19 is disposed on the steam pipe, so that high-temperature steam generated by the electrothermal steam generator 18 can enter the heat exchange pipe to perform rapid heat exchange.
The forming system of the carbon fiber prepreg product further comprises a water storage tank 21, the water storage tank 21 is communicated with the electrothermal steam generator 18 through a water storage pipeline, and a water storage booster pump 20 is arranged on the water storage pipeline and used for pumping water in the water storage tank 21 into the electrothermal steam generator 18.
The forming system of the carbon fiber prepreg product further comprises a cooling water recovery device 12, the outlet end of each heat exchange pipeline is communicated with the cooling water recovery device 12 through a water outlet pipeline, and a cooling water outlet valve 15 is arranged on the water outlet pipeline, so that water vapor generated after heat exchange in the heat exchange pipelines enters the cooling water recovery device 12.
The forming system of the carbon fiber prepreg product also comprises a cooling tower 11, wherein the cooling tower 11 is communicated with the heat exchange pipeline through a cooling pipeline, and a booster pump 13 and a cooling water inlet valve 14 are arranged on the cooling pipeline in series and used for introducing cooling water into the heat exchange pipeline; the cooling water recovery device 12 is communicated with the cooling tower 11 through a recovery pipeline, so that the water recovered by the cooling water recovery device 12 can enter the cooling tower 11.
The forming system of the carbon fiber prepreg product further comprises an air compressor 16, the air compressor 16 is communicated with the heat exchange pipeline through an air pipeline, and an air valve 17 is arranged on the air pipeline and used for introducing compressed air into the heat exchange pipeline.
The forming system of the carbon fiber prepreg product further comprises a PLC control unit 22, a temperature sensor 10 is arranged in the fixed die 23, the temperature sensor 10, a steam inlet valve 19, a water storage booster pump 20, a booster pump 13, a cooling water inlet valve 14, a cooling water outlet valve 15 and an air valve 17 are electrically connected with the PLC control unit 22, so that the PLC control unit 22 can select to input steam, cooling water or air pressure into the heat exchange pipeline according to temperature information fed back by the temperature sensor 10.
Example 3
Taking the production of the carbon fiber prepreg vertical cover plate for the high-speed motor train as an example, the structure of the carbon fiber prepreg vertical cover plate is shown in fig. 3, and the working flow of the forming method of the carbon fiber prepreg product is shown in fig. 4, and the method comprises the following steps:
A. firstly, a mould 9 is arranged according to the shape of a carbon fiber prepreg vertical cover plate 25, the mould 9 is designed to be formed by buckling a movable mould 24 and a fixed mould 23, and a thermoplastic prepreg reinforced by continuous carbon fiber filaments, carbon fiber two-dimensional fabrics and three-dimensional fabrics is heated by an infrared heating box, wherein the matrix of the carbon fiber filaments, the carbon fiber two-dimensional fabrics and the three-dimensional fabrics is one or more of thermoplastic resin Powder Polypropylene (PP), polyvinyl chloride (PVC), Polycarbonate (PC), Polyamide (PA), polyphenylene sulfide (PPS), polyether ether ketone (PEEK), polyphenyl ether, ABS, polyether ketone and polysulfone, the infrared heating box heats and softens the thermoplastic prepreg reinforced by the continuous carbon fiber filaments, the carbon fiber two-dimensional fabrics and the three-dimensional fabrics, the heating temperature is 10-30 ℃ higher than the melting temperature of plastics, so that the continuous carbon fiber filaments, the carbon fiber two, The carbon fiber two-dimensional fabric and three-dimensional fabric reinforced thermoplastic prepreg softens and reaches a state in which it can be plastically deformed.
B. And (3) superposing the preheated continuous carbon fiber filaments, the carbon fiber two-dimensional fabric and the three-dimensional fabric reinforced thermoplastic prepreg blank in a mold 9 layer by layer, moving the movable mold 24 by the action of the mold closing oil cylinder 1, and closing the mold by the mold 9.
C. The mold 9 enters a heating stage of rapid thermal cycle, an electric heating steam generator 18 is started, a steam inlet valve 19 is opened, so that generated high-temperature steam enters a heat exchange pipeline of the mold 9 to be heated, and the heating temperature of the rapid thermal cycle system to the mold 9 is set to be 10-30 ℃ higher than the melting temperature of a thermoplastic prepreg blank; and at the same time, the cooling water outlet valve 15 is opened, so that the cooling water formed after heat exchange enters the cooling water recovery device 12.
D. The temperature sensor 10 detects the temperature in the mold 9 and feeds the temperature back to the PLC control unit 22, and the PLC control unit 22 judges that the heating is finished and then closes the electric heating steam generator 18 and the steam inlet valve 19.
E. Vacuumizing the mould 9, and removing air in the mould cavity; and pressurizing the mold cavity at a set pressure, wherein the pressure of the mold 9 is set to be 10-20Mpa, and the pressure keeping time is 5-10 minutes.
F. After the pressure is maintained for a set time, the booster pump 13 is started, the cooling water inlet valve 14 is opened, so that the cooling water in the cooling tower 11 enters the heat exchange pipeline of the mold 9 for water cooling, and the cooling water outlet valve 15 is opened, so that the cooling water after heat exchange enters the cooling water recovery device 12 for recycling.
G. The cooling temperature of the mold 9 is set to 40-80 ℃, the temperature in the mold 9 is detected by the temperature sensor 10 and fed back to the PLC control unit 22, and the booster pump 13 and the cooling water inlet valve 14 are closed after the cooling is judged by the PLC control unit 22 to be completed.
H. Starting the air compressor 16 and opening the air valve 17, the high-pressure air in the air compressor 16 enters the heat exchange pipeline, and residual water in the heat exchange pipeline is discharged to prepare for the next cycle period.
I. The movable die 24 is driven by the die closing oil cylinder 1 to move, so that the movable die 24 is separated from the fixed die 23, and meanwhile, the ejection oil cylinder 8 is started to push the carbon fiber prepreg vertical cover plate 25 product formed in the die 9 to be separated from the movable die 24, and the product is taken out from the fixed die 23.
It should be understood that the above examples are only for clearly illustrating the present invention and are not intended to limit the embodiments of the present invention. Other variations and modifications will be apparent to persons skilled in the art in light of the above description. And are neither required nor exhaustive of all embodiments. And such obvious variations or modifications which fall within the spirit of the invention are intended to be covered by the scope of the present invention.

Claims (10)

1. The utility model provides a molding system of carbon fiber prepreg product, its characterized in that, including compound die hydro-cylinder, mould, parallel arrangement's pull rod, the fixed board that turns over of fixed pull rod front end of arranging in, set up on the pull rod with pull rod sliding fit's movable plate that turns over, the compound die hydro-cylinder passes through bent elbow connecting rod and movable plate transmission cooperation, the mould includes matched with movable mould and cover half, the cover half is fixed to be set up on the fixed board that turns over, the movable mould is fixed to be set up on the movable plate that turns over to the movable mould can be close to or keep away from the cover half when making the movable plate remove, set up ejection cylinder on the movable plate, the piston rod of ejection cylinder stretches into in the movable mould, so that ejection cylinder pushes away the goods in the mould.
2. The system for molding a carbon fiber prepreg product according to claim 1, further comprising a rapid thermal cycle system, wherein heat exchange pipes are arranged in the fixed mold and the movable mold, the rapid thermal cycle system comprises an electrothermal steam generator, the electrothermal steam generator is communicated with the heat exchange pipes through steam pipes, and a steam inlet valve is arranged on the steam pipes so that steam generated by the electrothermal steam generator can enter the heat exchange pipes.
3. The system for molding a carbon fiber prepreg product according to claim 2, further comprising a cooling water recovery device, wherein an outlet end of the heat exchange pipeline is communicated with the cooling water recovery device through a water outlet pipeline, and the water outlet pipeline is provided with a cooling water outlet valve, so that water vapor generated after heat exchange in the heat exchange pipeline enters the cooling water recovery device.
4. The system for molding a carbon fiber prepreg product according to claim 3, further comprising a cooling tower, wherein the cooling tower is communicated with the heat exchange pipeline through a cooling pipeline, and a booster pump and a cooling water inlet valve are arranged on the cooling pipeline in series and used for introducing cooling water into the heat exchange pipeline.
5. The system for molding a carbon fiber prepreg product according to claim 4, further comprising an air compressor, wherein the air compressor is communicated with the heat exchange pipeline through an air pipeline, and the air pipeline is provided with an air valve for introducing compressed air into the heat exchange pipeline.
6. The system for molding a carbon fiber prepreg product according to claim 5, wherein the cooling water recovery device is communicated with the cooling tower through a recovery pipeline so that water recovered by the cooling water recovery device can enter the cooling tower.
7. The system for molding a carbon fiber prepreg product according to claim 6, further comprising a water storage tank, wherein the water storage tank is communicated with the electric-heating steam generator through a water storage pipeline, and a water storage booster pump is arranged on the water storage pipeline and is used for pumping water in the water storage tank into the electric-heating steam generator.
8. The system for molding a carbon fiber prepreg product according to claim 7, further comprising a vacuum pumping system, wherein the vacuum pumping system is used for performing vacuum pumping and pressure maintaining in the mold after the movable mold and the fixed mold are closed.
9. The system for molding a carbon fiber prepreg product according to claim 8, further comprising a PLC control unit, wherein a temperature sensor is arranged in the fixed mold, and the temperature sensor, the steam inlet valve, the water storage pressurizing pump, the cooling water inlet valve, the cooling water outlet valve and the air valve are electrically connected with the PLC control unit.
10. A forming method of a carbon fiber prepreg product is characterized by comprising the following steps:
A. heating the thermoplastic prepreg reinforced by the continuous carbon fiber filaments, the carbon fiber two-dimensional fabric and the three-dimensional fabric through an infrared heating box, so that the thermoplastic prepreg reinforced by the continuous carbon fiber filaments, the carbon fiber two-dimensional fabric and the three-dimensional fabric is softened and reaches a state of plastic deformation;
B. placing the preheated continuous carbon fiber filament, the carbon fiber two-dimensional fabric and the three-dimensional fabric reinforced thermoplastic prepreg blank into a mold, moving a movable mold by the action of a mold closing oil cylinder, and closing the mold;
C. when the mold enters a heating stage of rapid thermal cycle, starting an electric heating steam generator and opening a steam inlet valve to enable the generated high-temperature steam to enter a heat exchange pipeline of the mold for heating; meanwhile, opening a cooling water outlet valve to enable cooling water formed after heat exchange to enter a cooling water recovery device;
D. the temperature sensor detects the temperature in the die and feeds the temperature back to the PLC control unit, and the PLC control unit closes the electric heating steam generator and the steam inlet valve after judging that the heating is finished;
E. vacuumizing the mould, and removing air in the mould cavity; and pressurizing the mould cavity at a set pressure;
F. starting a booster pump, opening a cooling water inlet valve to enable cooling water in a cooling tower to enter a heat exchange pipeline of the mold for water cooling, and opening a cooling water outlet valve to enable the cooling water to enter a cooling water recovery device for recycling;
G. the temperature sensor detects the temperature in the die and feeds the temperature back to the PLC control unit, and the PLC control unit closes the booster pump and the cooling water inlet valve after judging that the cooling is finished;
H. starting an air compressor and opening an air valve, wherein high-pressure gas in the air compressor enters a heat exchange pipeline, and residual water in the heat exchange pipeline is discharged to prepare for the next cycle period;
I. the die assembly oil cylinder drives the movable die to move, so that the movable die is separated from the fixed die, and meanwhile, the ejection oil cylinder is started to push a product formed in the die to be separated from the movable die and take out the product from the fixed die.
CN201911212503.4A 2019-12-02 2019-12-02 Forming system and forming method of carbon fiber prepreg product Pending CN110815869A (en)

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