CN216732527U - Pre-heating box and hot-pressing device for thermoplastic carbon fiber prepreg tape - Google Patents

Abstract

The utility model discloses a preheating box and a hot-pressing device for thermoplastic carbon fiber prepreg tapes, which comprise a supporting frame, wherein the supporting frame comprises a bottom plate and vertical side plates vertically arranged at two sides of the bottom plate, a top plate is erected above the vertical side plates, channel holes for the prepreg tapes to pass through are formed in the vertical side plates at two sides, a preheating assembly is arranged below the top plate and comprises an infrared shield, a first infrared heating section and a second infrared heating section are sequentially arranged in the infrared shield along the conveying direction of the prepreg tapes, infrared heating lamp tubes are respectively arranged in the first infrared heating section and the second infrared heating section, the length setting direction of the infrared heating tubes is consistent with the conveying direction of the prepreg tapes, first temperature measuring elements are respectively and correspondingly arranged in the first infrared heating section and the second infrared heating section, and the prepressing of a temperature monitoring system and an infrared roller of the device lays a foundation for the good impregnation of resin, the effect of fully impregnating the resin can be achieved with less pressure.

Description

Pre-heating box and hot-pressing device for thermoplastic carbon fiber prepreg tape

Technical Field

The utility model belongs to the field of composite material processing, and particularly relates to a preheating box and a hot-pressing device for a thermoplastic carbon fiber prepreg tape.

Background

The carbon fiber reinforced resin matrix composite material has a series of advantages of light weight, high strength, high fracture toughness, corrosion resistance, strong designability, easy forming, good vibration damping performance and the like, is considered to be a representative of a novel industrial material in the high-tech field, has important significance in national pillar industry upgrading of industrial development, has important significance in adjustment of national industrial structure and updating of traditional materials, and has great influence on national defense military industry and national economy.

The prepreg tape is a basic unit for preparing the carbon fiber reinforced composite material and the parts thereof, and the uniformity and the stability of the quality of the prepreg tape are important links for ensuring the quality and the reliability of the composite material and the parts thereof. According to the difference of the matrix material, the fiber reinforced thermosetting prepreg tape and the fiber reinforced thermoplastic prepreg tape can be divided. Compared with thermosetting plastics, the thermoplastic plastics have the advantages of short molding cycle, repeated heating and recycling, good impact resistance and the like, and become the leading plastics for the current prepreg tape research.

However, the thermoplastic resin has high viscosity, and how to realize uniform impregnation of the thermoplastic resin in the carbon fiber tows is a key step for preparing the prepreg tape with good performance. The conventional preparation process of the carbon fiber reinforced thermoplastic prepreg mainly comprises a solution impregnation method, a melting impregnation method and a powder impregnation method, but the solution impregnation method needs to remove a large amount of organic solvent, so that environmental pollution is caused, and all thermoplastic resin can not be dissolved in the organic solvent, so that the melting impregnation method and the powder impregnation method are dominant at present, and the realization of the two processes and hot pressing are indispensable links. In order to ensure the hot pressing effect and achieve the dipping effect better, the hot pressing needs to be carried out in the previous process of the hot pressing process, so that the defects of folds, uneven thickness, insufficient dipping, large shrinkage in the tape running direction and the like of the prepreg tape product are avoided, and the product quality is improved.

SUMMERY OF THE UTILITY MODEL

The utility model aims to solve the problems in the prior art and provides a preheating box for a thermoplastic carbon fiber prepreg tape and a hot pressing device.

In order to achieve the purpose, the utility model adopts the following technical scheme: a preheating box for thermoplastic carbon fiber prepreg tapes comprises a support frame, wherein the support frame comprises a bottom plate and vertical side plates vertically arranged on two sides of the bottom plate, a top plate is erected above the vertical side plates, channel holes for the prepreg tape to pass through are formed on the vertical side plates at two sides, a preheating assembly is arranged below the top plate, the preheating assembly comprises an infrared shield, a first infrared heating section and a second infrared heating section are sequentially arranged in the infrared shield along the conveying direction of the prepreg tape, infrared heating lamp tubes are respectively arranged in the first infrared heating section and the second infrared heating section, the length setting direction of the infrared heating tubes is consistent with the conveying direction of the prepreg tape, the first infrared heating section and the second infrared heating section are respectively and correspondingly provided with a first temperature measuring element, and the first temperature measuring elements are fixed below the top plate through the stand columns and used for detecting the temperature of the corresponding infrared heating sections.

Preferably, the connection part of the bottom plate and the vertical side plate is correspondingly provided with a support platform, a recovery disc is supported above the two support platforms, and the recovery disc is positioned below the prepreg tape and used for containing resin powder scattered on the prepreg tape.

Preferably, the infrared shield is adjusted to be lifted through a lifting driving assembly, and the infrared shield is used for enabling the preheating assembly to be close to or far away from the prepreg tape from the upper side.

As a preferred scheme, heat insulation plates are arranged on the inner sides of the bottom plate and the vertical side plates.

As the preferred scheme, still include the pre-compaction subassembly, the pre-compaction subassembly includes two risers, movable roll, first fixed roll and second fixed roll, and two risers are fixed respectively in the roof both sides, and movable roll, first fixed roll and second fixed roll arrange in proper order and set up between coexistence board, and the preimpregnation area is walked around in proper order by the top of movable roll, the below of first fixed roll and the top of second fixed roll, and first fixed roll and second fixed roll are used for carrying out the pre-compaction to the upper and lower terminal surface of preimpregnation area respectively.

Preferably, the two vertical plates are fixedly connected through two connecting rods, mounting holes are formed in the upper edges of the vertical plates, a plurality of adjusting holes are formed in one side of the top plate along the length direction, and the pre-pressing assembly is correspondingly mounted through the mounting holes and the adjusting holes, so that the horizontal mounting position of the pre-pressing assembly is adjusted.

According to the preferable scheme, an adjusting clamping groove is formed in the vertical plate, supporting parts at two ends of the movable roller, the first fixed roller and the second fixed roller are all installed in the adjusting clamping groove through fasteners, and the movable roller, the first fixed roller and the second fixed roller can be subjected to height adjustment along the length direction of the adjusting clamping groove and are used for adjusting the coating angle of the prepreg tape.

This scheme still provides a hot press unit, includes above arbitrary a thermoplasticity carbon fiber preimpregnation area is with preheating case.

As a preferable scheme, the device further comprises a shaping hot-pressing mechanism, wherein the shaping hot-pressing mechanism is arranged on the output side of the prepreg tape of the preheating box; the plastic hot pressing mechanism comprises an upper steel belt and a lower steel belt, a driving roller and a driven roller are respectively arranged at two ends of the upper steel belt and the lower steel belt, a gap through which a prepreg tape passes is formed between the upper steel belt and the lower steel belt, a plurality of hot pressing roller sets are correspondingly arranged on the upper end face of the lower side of the upper steel belt and the upper end face of the lower side of the lower steel belt, and a power transmission roller is correspondingly arranged on the upper end face of the upper side of the upper steel belt and the lower end face of the lower steel belt.

As preferred scheme, be provided with the plastic roller set in compression roller set intermediate position, the plastic roller set includes sizing roller and lower sizing roller, and the one end of going up sizing roller is driven and is rotated, and the inside of going up sizing roller is provided with interior heating portion and second temperature element, and the second temperature element is used for monitoring the temperature of interior heating portion.

Advantageous effects

1. This scheme is through improving, two sections infrared heating fluorescent tubes around infrared shield below having arranged, and two sections infrared heating fluorescent tubes are through the heating of transmission infrared ray realization to the preimpregnation area around, and each section fluorescent tube is equal all can the independent control to satisfy different heating demands. The function of the front-stage infrared heating lamp tube is used for melting the powder resin on the carbon fiber bundle so as to prevent the powder from scattering after direct pressurization. The rear-section infrared heating lamp tube is used for keeping good fluidity of resin at a slightly low temperature, and facilitates later-stage hot pressing.

2. This scheme, infrared guard shield carry out lift adjustment through lift actuating mechanism, are controlled by servo motor and drive infrared guard shield up-and-down motion, preheat the subassembly and are close to or keep away from the preimpregnation area to satisfy different temperature and processing demands, in order to realize the purpose of energy saving.

3. This scheme, the left infrared roller of pre-compaction subassembly is the movable roll for pull and get rid of unnecessary resin, and the first fixed roller that is located the middle part and the second fixed roller on right side arrange from top to bottom and realize the pre-compaction to two sides about the preimpregnation area. The vertical side plate can be adjusted left and right along the positioning hole of the top plate and is used for changing the prepressing position of the infrared roller. The three groups of infrared rollers can move up and down along the adjusting clamping grooves of the vertical side plates to adjust the wrapping angle of the prepreg tape, so that the aim of changing the pre-pressing pressure is fulfilled.

4. According to the scheme, the hot pressing device realizes continuous hot pressing through the hot pressing steel belt, so that the effect of fully impregnating resin can be achieved by using smaller pressure, and the prepreg with the advantages of smooth surface, excellent mechanical property, accurate thickness and uniform width is prepared.

Drawings

FIG. 1 is a front view of a preheating cabinet of the present invention;

FIG. 2 is a perspective view of a preheating cabinet of the present invention;

FIG. 3 is a schematic diagram of the operation of the pre-pressing assembly of the present invention;

FIG. 4 is a schematic diagram of the operation of the hot press apparatus of the present invention;

FIG. 5 is a view showing the construction of a hot press apparatus according to the present invention;

the labels in the figure are: 1. a supporting frame, 11, a bottom plate, 12, vertical side plates, 13, a top plate, 14, a heat insulation plate, 2, a preheating assembly, 21, an infrared shield, 22, a first infrared heating section, 23, a second infrared heating section, 3, a pre-pressing assembly, 31, a movable roller, 32, a first fixed roller, 33, a second fixed roller, 34, a vertical plate, 341, a regulating clamping groove, 35, a connecting rod, 4, a first temperature measuring element, 41, a pillar, 42, a pillar clamp, 43, a thermocouple, 5, a supporting table, 6, a recycling disc, 7, a lifting driving assembly, 71, a lifting seat, 72, a lifting motor, 73, a lifting thread sliding table, 74, a lifting screw rod, 75, a guide rod, 8, a powder coating chamber, 81, an upper automatic powder spraying gun, 82, a lower automatic powder spraying gun, 9, a shaping hot-pressing mechanism, 91, an upper steel belt, 92, a lower steel belt, 93, a driving roller, 94, a driven roller, 95, a compression roller set, 96, a shaping roller set, 97. the device comprises a power transmission roller, 100, a prepreg tape, 200, an upper heating zone, 300, a lower heating zone, 400 and a cooling zone.

Detailed Description

The utility model is described in detail below by way of exemplary embodiments. It should be understood, however, that elements, structures and features of one embodiment may be beneficially incorporated in other embodiments without further recitation.

As shown in fig. 1, the embodiment provides a preheating box for thermoplastic carbon fiber prepreg tapes, which comprises a supporting frame 1, wherein the supporting frame 1 comprises a bottom plate 11 and vertical side plates 12 vertically arranged at two sides of the bottom plate 11, a top plate 13 is erected above the vertical side plates 12, the bottom plate 11, the two vertical side plates 12 and the top plate 13 form a rectangular frame structure, and heat insulation plates 14 are arranged at the inner sides of the two vertical side plates 12 and the bottom plate to prevent the external part from being heated and having too high temperature. Be formed with the channel hole 121 that is used for prepreg tape 100 to pass through on the perpendicular curb plate 12 in both sides, be provided with preheating unit 2 in roof 13 below, preheating unit 2 includes infrared guard shield 21, first infrared heating section 22 and second infrared heating section 23 have set gradually along prepreg tape 100 direction of delivery in infrared guard shield 21, two sections infrared heating lamps in front and back are provided with respectively in two sections infrared heating sections, the length setting direction of infrared heating lamp is unanimous with prepreg tape 100's direction of delivery, two sections infrared heating lamps in front and back realize the heating to prepreg tape 100 through the transmission infrared ray, each section lamp all can be controlled alone, in order to satisfy different heating demands. The function of the front-stage infrared heating lamp tube is to melt the powder resin on the carbon fiber bundle so as to prevent the powder from scattering after direct pressurization. The rear-section infrared heating lamp tube is used for heating so that the resin keeps better fluidity at a lower temperature and is convenient for later-stage hot pressing.

This scheme, bottom plate 11 corresponds with the junction of erecting curb plate 12 and is provided with brace table 5, supports in the top of two brace tables 5 and is provided with recovery dish 6, and recovery dish 6 is located the preimpregnation area 100 below of treating the processing for connect the resin powder who scatters on preimpregnation area 100 greatly.

According to the scheme, the first temperature measuring elements 4 are respectively and correspondingly arranged on the first infrared heating section 22 and the second infrared heating section 23, and the two first temperature measuring elements 4 are fixed below two sides of the top plate 13 and used for detecting the temperature of the corresponding infrared heating sections. Specifically, the first temperature measuring element 4 comprises two thermocouples 43 arranged at the position close to the prepreg tape 100, the hot ends of the thermocouples 43 are placed in the infrared heating area above the prepreg tape 100 through two support columns 41 and are fixed on the top plate 13 through column clamps 42, the thermocouples 43 can accurately monitor the real-time temperature of the prepreg tape 100 and feed the temperature back to the console in time, the console judges whether temperature rise and heating are needed to be continued or not by comparing the difference between the target temperature and the real-time temperature, and the closed-circuit system can realize accurate control of the temperature of the area.

This scheme is provided with lift drive assembly 7 on roof 13, and infrared guard shield 21 carries out lift adjustment through lift drive assembly 7 to be close to or keep away from preimpregnation area 100 by the top, satisfy different temperature and processing demand, the energy saving. The lifting driving assembly 7 comprises a lifting seat 71, a lifting motor 72, a lifting thread sliding table 73, a lifting screw rod 74 and guide rods 75, wherein the lifting seat 71 is positioned above the top plate 13, the lifting seat 71 is provided with a plurality of guide rods 75, and the guide rods 75 penetrate through guide holes in the top plate 13 and are used for guiding in the lifting adjusting process of the lifting seat 71; the lifting motor 72 is installed on the lifting seat 71, the lifting motor 72 drives the lifting screw rod 74 at the output end of the lifting motor to rotate, the lifting thread sliding table 73 is fixedly connected with the top plate 13, and the lower end of the lifting screw rod 74 penetrates through a threaded hole of the lifting thread sliding table 73 and is rotatably connected with the infrared shield 21 so as to drive the preheating assembly 2 to lift through the lifting thread sliding table 73.

This embodiment, as shown in fig. 1 and fig. 3, still include pre-compaction subassembly 3, pre-compaction subassembly 3 is including two adjustable risers 34 that are located both sides around the perpendicular curb plate 12, be equipped with two sets of connecting rods 35 and three groups of infrared rollers of height-adjusting from top to bottom on riser 34, two sets of connecting rods 35 are used for the front and back both sides of fixed riser 34, realize fixed connection through two connecting rods 35 between the coexistence board 34, three groups of infrared rollers are arranged in proper order, and highly can follow the regulation draw-in groove 341 on riser 34 and reciprocate, thereby adjust the cladding angle of prepreg tape 100, reach the purpose that changes pre-compaction pressure. Three groups of infrared rollers are coated with Teflon so as to facilitate surface cleaning. In the figure, the first group of infrared rollers on the left side are movable rollers 31 used for drawing and removing redundant resin, the second group of infrared rollers and the third group of infrared rollers are respectively a first fixed roller 32 and a second fixed roller 33, and the two groups of fixed rollers are arranged up and down to pre-press the upper surface and the lower surface of the prepreg tape 100. Riser 34 can remove about the location mounting hole of roof 13 for change the position of infrared roller pre-compaction, be formed with the mounting hole along being formed with on riser 34, be formed with a plurality of regulation holes along length direction in one side of roof 13, pre-compaction subassembly 3 passes through the mounting hole and adjusts the corresponding installation in hole, thereby realizes pre-compaction subassembly 3 and carries out position control along left right direction.

Specifically, the movable roller 31, the first fixed roller 32 and the second fixed roller 33 are sequentially arranged between the two vertical plates 34, and the movable roller 31 can rotate freely relative to the vertical plates and is driven to rotate only by the transmission of the prepreg tape 100. The first fixed roller 32 and the second fixed roller 33 are not rotatable, and the prepreg tape 100 passes over the movable roller 31, under the first fixed roller 32, and over the second fixed roller 33 in this order.

As shown in fig. 4-5, the present solution further provides a hot pressing device, which includes the above preheating box and the shaping hot pressing mechanism 9, the shaping hot pressing mechanism 9 includes a frame, one end of the frame is provided with a set of driving rollers 93 arranged up and down, the driving rollers 93 are connected with a servo motor to provide power for the shaping hot pressing mechanism 9, and the other end is provided with a set of driven rollers 94 arranged up and down. The lower parts of the upper surfaces of the two steel belts are provided with power transmission rollers 97, the upper steel belt 91 and the lower steel belt 92 divide the device into an upper part and a lower part, the upper part and the lower part are supported by four groups of sliding block supports fixed on the rack, wherein the lower steel belt 92 can move up and down along a linear sliding rail on the sliding block supports under the driving of a driving motor, the gap between the two steel belts is adjusted, and the feeding processing requirements of different thicknesses are met.

Referring to fig. 4, three independently controllable heating sections are arranged between the driven roller 94 and the shaping roller group 96, each heating section is divided into an upper heating zone 200 and a lower heating zone 300, and the temperature of each heating zone is provided with a separate thermocouple temperature monitoring system so as to ensure that the heating temperatures of the three zones are accurately controllable. The pressure roller set 95 for heating is positioned in the heating area, each pressure roller set 95 for heating comprises a fixed roller positioned on the lower steel belt 92 and a movable roller positioned on the upper steel belt 91, the position of the movable roller relative to the fixed roller can be adjusted through a lead screw, the pressure is changed, the pressure to be detected directly acts on a diaphragm of the pressure sensor, the diaphragm generates micro displacement in direct proportion to the pressure of a substance, the resistance value of the sensor is changed, an electronic circuit detects the change, and the change is converted into a standard measuring signal corresponding to the pressure and output to a pressure display panel of a control console, so that the digital accurate control of the pressure is realized. The heating zone carries out continuous hot pressing on the prepreg through the double steel belts at a certain temperature and pressure, so that matrix resin can be slowly and fully impregnated into the carbon fiber bundles, and the key point for preparing the prepreg belt with good mechanical property is realized.

In this scheme, sizing roller set 96 is located the frame middle part, and wherein go up the sizing roller and also link to each other with servo motor through the gear, can enable with drive roller 93 linkage. Lead is filled in the shaping roller, the shaping roller is heated by an independent heating system, the maximum processing temperature can reach 450 ℃, and the thermocouple detects the internal temperature in real time and feeds the internal temperature back to the console.

More specifically, the gap adjustment of the upper shaping roller and the lower shaping roller is realized by two sets of wedge block gap adjusting devices. The subassembly of lower design roller is equipped with down wedge-shaped inclined plane, the subassembly upper rack of going up the design roller has the lead screw that has the slide wedge, the slide wedge even has the slip face, the lead screw level is placed, one end passes through the shaft coupling and links to each other with servo motor, servo electric drive lead screw is rotatory, make the slide wedge along lead screw axial displacement, the slide wedge promotes the slider and reciprocates, in order to obtain small displacement volume on the direction perpendicular with the lead screw axle, the displacement volume feeds back to the control cabinet through digital display altimeter, the numerical value of relative position can be adjusted in real time to the control cabinet in process of production, realize the accurate control to thickness and pressure, realize the design basis thickness of prepreg tape 100.

According to the scheme, the cooling area 400 is arranged in the post-process of the hot pressing device, three groups of pressing rollers are arranged in the cooling area 400, the arrangement mode of the pressing rollers is the same as that of the heating area, and accurate control of pressure can be achieved. The air cooler provides cold air to gradually cool the prepreg tape 100, so that the prepreg tape 100 is maintained in pressure and is shaped, the prepreg tape 100 is prevented from shrinking and deforming, and the material collection is convenient to cut.

In this embodiment, as shown in fig. 4, a powder coating chamber 8 is provided in a step prior to the hot press apparatus, the carbon fiber filaments after spreading are drawn by a drawing driven roller to reach the powder coating chamber 8, and the powder coating chamber 8 is a closed transparent cover with a passage for the carbon fiber filaments to pass through left and right. The thermoplastic resin powder is sprayed by an upper automatic powder spraying gun 81 and a lower automatic powder spraying gun 82 and then suspended in the powder coating chamber 8, a nozzle of the automatic powder spraying gun comprises a hollow guide plate and a hollow electrode needle, the powder flow from the spray gun can be atomized and electrified, and the electrified powder is adsorbed on the carbon fiber wires in the pre-powder coating chamber 8 under the action of electrostatic attraction. The redundant scattered thermoplastic resin powder is recovered by a recovery system, so that the recycling is convenient. The atomizing amount and the electric charge amount of the automatic spray gun can be regulated and controlled, different parameters can be set to control the content of the resin powder, and the content of the carbon fiber in the ideal prepreg tape is 45-50 wt%. Subsequently, the carbon fiber filaments coated with the resin are output through the powder coating chamber 8 and enter the passage hole 121 of the preheating tank.

In this embodiment, the carbon fiber filaments after powder coating reach the shaping hot-press mechanism 9 under the action of traction force, and are preheated in the preheating device box to primarily melt the resin powder, and then enter the double steel belts for further hot-pressing. The front section of the double-steel-belt comprises an upper heating area 200 and a lower heating area 300, resin prepreg is hot-pressed by combining a pressing roller, the prepreg is further hot-pressed by a shaping roller group 96, and the prepreg is cooled and solidified and molded by local cold air in a cooling area 400 at the rear section of the double-steel-belt. The double-steel-belt hot-pressing and cooling device ensures that carbon fiber prepreg receives continuous and uniform hot pressing, has good impregnation effect, can over-meet the requirement of continuous automatic production, has real-time adjustable temperature and pressure in each area, and can realize customized production according to different thermoplastic materials and carbon fiber content.

It should be noted that while the utility model has been described in terms of the above-mentioned embodiments, other embodiments are also possible. It will be apparent to those skilled in the art that various changes and modifications may be made without departing from the spirit and scope of the utility model, and it is intended that all such changes and modifications be covered by the appended claims and their equivalents.

Claims (10)

1. The utility model provides a thermoplastic carbon fiber preimpregnation area is with preheating case, includes braced frame (1), its characterized in that: the supporting frame (1) comprises a bottom plate (11) and vertical side plates (12) vertically arranged on two sides of the bottom plate (11), a top plate (13) is erected above the vertical side plates (12), channel holes (121) for the prepreg tape (100) to pass through are formed in the vertical side plates (12) on the two sides, a preheating assembly (2) is arranged below the top plate (13), the preheating assembly (2) comprises an infrared shield (21), a first infrared heating section (22) and a second infrared heating section (23) are sequentially arranged in the infrared shield (21) along the conveying direction of the prepreg tape (100), infrared heating lamp tubes are respectively arranged in the first infrared heating section (22) and the second infrared heating section (23), the length setting direction of the infrared heating tubes is consistent with the conveying direction of the prepreg tape (100), and first temperature measuring elements (4) are respectively and correspondingly arranged in the first infrared heating section (22) and the second infrared heating section (23), the first temperature measuring element (4) is fixed below the top plate (13) through the upright post (41) and is used for detecting the temperature of the corresponding infrared heating section.

2. A preheating cabinet for a thermoplastic carbon fiber prepreg tape according to claim 1, wherein: the bottom plate (11) and the junction of erecting curb plate (12) correspond and are provided with brace table (5), support in the top of two brace tables (5) and be provided with recovery dish (6), recovery dish (6) are located prepreg tape (100) below for connect the resin powder who scatters on prepreg tape (100) greatly.

3. A preheating cabinet for thermoplastic carbon fiber prepreg tape according to claim 1, wherein: the infrared shield (21) is adjusted in a lifting way through a lifting driving component (7) and is used for enabling the preheating component (2) to be close to or far away from the prepreg tape (100) from the upper side.

4. A preheating cabinet for thermoplastic carbon fiber prepreg tape according to claim 1, wherein: and heat insulation plates (14) are arranged on the inner sides of the bottom plate (11) and the vertical side plates (12).

5. A preheating cabinet for thermoplastic carbon fiber prepreg tape according to claim 1, wherein: still include pre-compaction subassembly (3), pre-compaction subassembly (3) include two risers (34), move roller (31), first fixed roller (32) and second fixed roller (33), two risers (34) are fixed respectively in roof (13) both sides, move roller (31), first fixed roller (32) and second fixed roller (33) arrange in proper order and set up between two risers (34), prepreg tape (100) are by the top of moving roller (31), the below of first fixed roller (32) and the top of second fixed roller (33) are walked around in proper order, first fixed roller (32) and second fixed roller (33) are used for carrying out the pre-compaction to the upper and lower both ends face of prepreg tape (100) respectively.

6. A preheating cabinet for thermoplastic carbon fiber prepreg tape according to claim 5, wherein: the two vertical plates (34) are fixedly connected through two connecting rods (35), mounting holes are formed in the upper edges of the vertical plates (34), a plurality of adjusting holes are formed in one side of the top plate (13) in the length direction, and the pre-pressing assembly (3) is correspondingly mounted through the mounting holes and the adjusting holes, so that the horizontal mounting position of the pre-pressing assembly (3) can be adjusted.

7. A preheating cabinet for thermoplastic carbon fiber prepreg tape according to claim 5, wherein: an adjusting clamping groove (341) is formed in the vertical plate (34), supporting portions at two ends of the movable roller (31), the first fixed roller (32) and the second fixed roller (33) are all installed in the adjusting clamping groove (341) through fasteners, and the movable roller (31), the first fixed roller (32) and the second fixed roller (33) can be adjusted in height along the length direction of the adjusting clamping groove (341) and are used for adjusting the wrapping angle of the prepreg tape (100).

8. A hot press unit, its characterized in that: a preheating cabinet for a prepreg comprising thermoplastic carbon fibers according to any one of claims 1 to 7.

9. A hot press apparatus as claimed in claim 8, wherein: the hot pressing device also comprises a shaping hot pressing mechanism (9), wherein the shaping hot pressing mechanism (9) is arranged on the output side of the prepreg tape (100) of the preheating box;

shaping hot pressing mechanism (9) are including last steel band (91) and lower steel band (92), are provided with drive roller (93) and driven voller (94) respectively at the inside both ends of last steel band (91) and lower steel band (92), go up steel band (91) and be formed with the clearance that preimpregnation area (100) passed through down between steel band (92), the terminal surface corresponds under the downside up end of last steel band (91) and the upside of lower steel band (92) and is provided with a plurality of compression roller group (95), and the terminal surface corresponds under the upside of last steel band (91) and the downside up end of lower steel band (92) and is provided with power transmission roller (97).

10. A hot press apparatus as claimed in claim 9, wherein: be provided with plastic roller set (96) in compression roller set (95) intermediate position, plastic roller set (96) are including sizing roller and sizing roller down, and the one end of going up sizing roller is driven and is rotated, and the inside of upper and lower sizing roller is provided with interior heating portion and second temperature element, and second temperature element is used for monitoring the temperature of interior heating portion.

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