CN109648736B

CN109648736B - Continuous automatic prepreg processing production line and process thereof

Info

Publication number: CN109648736B
Application number: CN201811587381.2A
Authority: CN
Inventors: 许莆嘉
Original assignee: Zhejiang Lihe Electric Technology Co ltd
Current assignee: Zhejiang Lihe Electric Technology Co ltd
Priority date: 2018-12-25
Filing date: 2018-12-25
Publication date: 2021-02-09
Anticipated expiration: 2038-12-25
Also published as: CN109648736A

Abstract

The invention provides a continuous automatic prepreg processing production line and a process thereof, the production line automatically cuts the connecting end parts of two prepregs to be connected to form a first splicing head and a second splicing head which are mutually inserted, spliced and matched in a rectangular tooth shape, and then a hot pressing mechanism is used for synchronously hot pressing the first splicing head and the second splicing head to ensure that resin on the first splicing head and the second splicing head are melted and compatibly connected, the technical problem of inconsistent thickness after the prepregs are spliced is solved, meanwhile, the braking in the prepreg rolling process is realized by controlling the tension of the prepregs to match the rectangular tooth shape cutting of the prepregs, the process automatically cuts the connecting end parts of the two prepregs to be connected to form the first splicing head and the second splicing head which are mutually inserted, spliced and matched in a rectangular tooth shape by increasing the hot pressing step, and then hot pressing is carried out by a hot pressing mechanism, so that the resin on the prepreg is compatible after hot melting to form connection.

Description

Continuous automatic prepreg processing production line and process thereof

Technical Field

The invention relates to the technical field of prepreg production, in particular to a continuous automatic prepreg processing production line and a process thereof.

Background

The prepreg reinforced composite material is a composition prepared by impregnating continuous fibers or fabrics with a resin matrix under strictly controlled conditions to prepare the resin matrix and a reinforcement, is an intermediate material for manufacturing the composite material, and is classified according to physical states, and the prepreg is divided into a unidirectional prepreg, a unidirectional fabric prepreg and a fabric prepreg; the prepreg is divided into thermosetting resin prepreg and thermoplastic resin prepreg according to different resin matrixes; according to different reinforcing materials, the prepreg is divided into carbon fiber (fabric) prepreg, glass fiber (fabric) prepreg and aramid fiber (fabric) prepreg; according to the difference of the fiber length, the prepreg is divided into short fiber (4176mm or less) prepreg, long fiber (1217mm) prepreg and continuous fiber prepreg; according to different curing temperatures, the prepreg can be divided into a medium-temperature curing (120 ℃) prepreg, a high-temperature curing (180 ℃) prepreg, a prepreg with the curing temperature exceeding 200 ℃ and the like.

In the production process of the prepreg, the front and rear adjacent two prepregs need to be connected by hot pressing the overlapped parts of the two prepregs end to end in the production process, and the connection principle is that in the hot pressing process, the resin on the prepregs is heated to return to a flowable fluid state, and the lap joint is formed by the compatibility of the resin on the two prepregs.

However, the mutually overlapped positions can cause the thickness inconsistency of the connecting position and other positions due to the thickness of the double-layer prepreg, and the technical problem of inconvenient processing caused by the inconsistent thickness in the subsequent processing and using process of the prepreg is solved.

The Chinese patent with the patent number of CN108357119A discloses a fiber prepreg mould hot-pressing continuous production line, which comprises a longitudinal frame device, a transverse frame device and a forming press, wherein the longitudinal frame device longitudinally penetrates through the forming press and the transverse frame device, the transverse frame device is positioned at one end of the longitudinal frame device, and the forming press is positioned at one side of the transverse frame device; a longitudinal slide rail assembly is arranged in the longitudinal rack device, and a stacked material carrying movable trolley is mounted through the longitudinal slide rail assembly and longitudinally moves in the longitudinal rack device, the forming press and the transverse rack device; the longitudinal frame device is provided with three longitudinal position sensors, wherein the first longitudinal position sensor is located at the other end of the longitudinal frame device, the second longitudinal position sensor is located at the forming press, and the third longitudinal position sensor is located at the transverse frame device.

Disclosure of Invention

Aiming at the problems, the invention provides a continuous automatic prepreg processing production line, which is characterized in that a first splicing head and a second splicing head which are matched with each other in a splicing manner and are inserted into each other in a rectangular and toothed manner are formed by automatically cutting the connecting end parts of two prepregs to be connected, and then the first splicing head and the second splicing head are synchronously hot-pressed by a hot pressing mechanism, so that the first splicing head and the resin on the second splicing head are subjected to heat melting and then are compatible to form connection, the technical problem of inconsistent thickness after the prepregs are spliced is solved, and meanwhile, the prepreg is braked in the coiling process by controlling the tension speed of the prepregs to be matched with the rectangular and toothed cutting of the prepregs.

In order to achieve the purpose, the invention provides the following technical scheme:

the utility model provides a continuous type preimpregnation material automatic processing production line, along the processing direction of delivery of preimpregnation material, includes unwinding device, saturating device, molding device in proper order, still including set up in hot press unit between saturating device and the molding device, hot press unit includes:

the hot pressing mechanism comprises a hot pressing workbench which is horizontally arranged, a hot pressing plate which can be arranged in a lifting manner along the vertical direction is arranged right above the hot pressing workbench, heating wires are arranged in the hot pressing plate along the length direction of the hot pressing plate, and the hot pressing plate is used for carrying out hot pressing connection on the head and tail lap joints of adjacent prepregs;

the tensioning mechanism is arranged in front of the hot pressing mechanism along the processing and conveying direction of the prepreg and comprises a tensioning assembly, a first splicing plate and a first pressing assembly, the tensioning assembly is arranged close to the impregnating device, the first splicing plate is horizontally arranged between the tensioning assembly and the hot pressing workbench, one end, overlapped with the hot pressing workbench, of the first splicing plate is arranged in a rectangular tooth shape, and the first pressing assembly is arranged on the first splicing plate and used for pressing and fixing the prepreg laid on the first splicing plate;

the cutting mechanism is arranged behind the hot pressing mechanism along the processing and conveying direction of the prepreg and comprises a cutting component, a second pressing component, a rotating component and a locking component, the cutting component comprises a second splice plate, a first cutter and a second cutter, the second splice plate is rotationally arranged on a mounting frame through a pneumatic spring which is symmetrically arranged, one end of the second splice plate, which is lapped with the hot pressing workbench, is in a zigzag arrangement and is in splicing and matching arrangement with the first splice plate, the first cutter is arranged on the rotating path of the second splice plate through the mounting frame and is in corresponding inserting and matching with the tooth-missing part of the second splice plate, the second cutter is arranged at one end of the second splice plate, which is correspondingly spliced with the first splice plate, and is in corresponding inserting and matching with the tooth-missing part of the first splice plate, the second pressing component is symmetrically arranged at two sides of the width direction of the second splice plate, the prepreg spreading on the second splice plate is pressed and fixed, the rotating assembly is arranged on one side of a rotating shaft of the second splice plate and drives the second splice plate to rotate and reset, and the locking assemblies are symmetrically arranged on two sides of the rotating shaft of the second splice plate and are used for positioning and locking the reset second splice plate; and

conveying mechanism, conveying mechanism set up in cutting mechanism's rear, it is including pressing from both sides the tight rod subassembly that presss from both sides that tight preimpregnation material liftable set up and the drive assembly that drive preimpregnation material was carried, press from both sides the rod subassembly rise with but drive assembly transmission connection sets up, just press from both sides the rod subassembly descend with locking component extrudees, relieve locking component is right the location locking of second splice plate.

As an improvement, four corners of the horizontal plane of the hot pressing plate are provided with unlocking fixture blocks, the unlocking fixture blocks are correspondingly clamped with the first pressing component and the second pressing component respectively, and a U-shaped unlocking bayonet is arranged on the unlocking fixture blocks.

As an improvement, the tensioning assembly comprises:

a support;

the fixed guide roller is rotatably erected at the top of the bracket;

the movable guide roller is arranged in parallel with the fixed guide roller, is located under the fixed guide roller, and is lifted and lowered along the vertical direction of the support through the first pushing part at two ends of the movable guide roller.

As an improvement, the first compression assembly comprises:

the second pushing piece is arranged at the top of the first splicing plate and is used for vertically pushing, and the pushing end of the second pushing piece is connected with a horizontally arranged pushing plate;

the first positioning rods are symmetrically and vertically arranged at two ends of the first splicing plate in the width direction, a first pressing block is arranged on the part of the first positioning rods above the first splicing plate, a triangular first guide block is arranged on the part of the first positioning rods below the first splicing plate, and a first elastic piece is arranged between the first pressing block and the first splicing plate in a propping manner; and

the second positioning rod is symmetrically and horizontally arranged at two ends of the first splicing plate in the width direction, and is in one-to-one corresponding arrangement with the first positioning rod, a triangular first clamping block is arranged at one end of the first guide block, the first clamping block faces away from the first guide block, a conical second clamping block is arranged at one end of the first guide block, a first bayonet clamped with the first positioning rod is arranged on the first clamping block, the inclined surface of the first clamping block is in sliding fit with the inclined surface of the first guide block, the second clamping block corresponds to the unlocking clamping block, and a second elastic piece in a compression arrangement is sleeved on the second positioning rod.

As a refinement, the second compression assembly comprises:

the top blocks are symmetrically arranged on two sides of the second splicing plate and fixedly connected with the mounting rack;

the third positioning rods are symmetrically and vertically arranged at two ends of the second splicing plate in the width direction, rotate along with the second splicing plate and are in extrusion contact with the ejector block, a second pressing block is arranged at the part of the third positioning rods above the second splicing plate, a triangular second guide block is arranged at the part of the third positioning rods below the second splicing plate, and a third elastic piece is arranged between the second pressing block and the second splicing plate in a propping manner; and

the fourth positioning rod is symmetrically and horizontally arranged at two ends of the second splicing plate in the width direction, is in one-to-one correspondence with the third positioning rod and is just opposite to one end of the second guide block, a triangular third clamping block is arranged at one end of the second guide block in a back-to-back mode, a conical fourth clamping block is arranged at one end of the second guide block, a second bayonet clamped with the third positioning rod is arranged on the third clamping block, the inclined surface of the third clamping block is in sliding fit with the inclined surface of the second guide block, the fourth clamping block corresponds to the unlocking clamping block, and a fourth elastic piece in a compression setting is sleeved on the fourth positioning rod.

As an improvement, the rotating assembly comprises:

the first driving motor is arranged on one axial side of a rotating shaft of the second splicing plate, and a first driving gear is sleeved on a motor shaft of the first driving motor; and

and the first driven gear is arranged on the rotating shaft of the second splicing plate and is in meshed transmission connection with the first driving gear.

As an improvement, the locking assembly comprises:

the T-shaped locking block is vertically arranged right above the first driven gear in a sliding manner along a guide rod and is clamped with the first driven gear;

the fifth elastic piece is sleeved on the guide rod, is arranged in a compressed mode and extrudes the T-shaped locking block; and

the lever is hinged to the mounting frame, one end of the lever is connected with the T-shaped locking block in a sleeved mode through a kidney-shaped groove, and the other end of the lever swings and is arranged under the clamping roller assembly.

As an improvement, the clip stick assembly comprises:

the device comprises clamping rollers, a conveying device and a control device, wherein the clamping rollers are rotatably arranged in parallel, and prepreg is conveyed between the two clamping rollers;

the cross guide blocks are symmetrically arranged at two axial ends of the clamping rod, sleeved on the clamping rod and vertically arranged in a lifting manner;

the optical axes are symmetrically and vertically arranged at two axial ends of the clamping roller and used for guiding the vertical lifting of the cross-shaped guide block; and

the elastic cushion covers the bottom of the optical axis, and the elastic cushion covers the bottom of the optical axis and cushions the cross-shaped guide block.

As an improvement, the drive assembly comprises:

the second driving motor is arranged on any side of the clamping roller in the axial direction;

the gear transmission group is arranged on the clamping roller and is positioned on the same side of the clamping roller in the axial direction with the second driving motor;

and the driving gear is arranged on the second driving motor, sleeved on a motor shaft of the second driving motor and in meshing transmission with the gear transmission set.

The production line has the beneficial effects that:

(1) according to the invention, the connecting end parts of two pieces of prepreg to be connected are automatically cut to form the first splicing head and the second splicing head which are matched with each other in a penetrating and splicing manner and are rectangular and toothed, and the first splicing head and the second splicing head are synchronously hot-pressed by the hot-pressing mechanism, so that the first splicing head and the resin on the second splicing head are subjected to hot melting and then are compatible to form connection, the consistent thickness of the prepreg after splicing is kept, and the subsequent reprocessing of the prepreg is facilitated;

(2) according to the invention, the transmission connection between the clamping roller assembly and the driving assembly is controlled by adjusting the tensioning degree of prepreg conveying, so that the braking and conveying in the prepreg conveying process are realized, and the cutting assembly can automatically cut the prepreg to form a first splicing head and a second splicing head;

(3) when the clamping roller assembly and the driving assembly are separated and the prepreg conveying is suspended, the clamping roller assembly slides downwards by means of gravity to pull the prepreg, so that the end part of the prepreg is automatically positioned on the second splicing plate, and the subsequent cutting of a first cutter is facilitated to form a first splicing head;

(4) according to the invention, the clamping roller assembly is extruded with the lever when sliding to the bottom of the optical axis by gravity, the T-shaped locking block is lifted by the lever, the positioning and locking of the second splice plate are released, the automatic rotation of the second splice plate is realized, and the cutting action of the prepreg and the first cutter is further realized;

(5) in the process of resetting the second splicing plate, the second splicing head is formed by automatically cutting the end part of the prepreg on the second cutting knife and the first splicing plate, and the second splicing head is just in inserting fit with the first splicing head, so that the structure is simple and convenient;

(6) when the first splicing head and the second splicing head are cut from the prepreg, the prepreg is fixed through the first compacting component and the second compacting component respectively, so that the sliding of the prepreg in the cutting process is avoided, and the cut first splicing head and the cut second splicing head cannot be spliced perfectly;

(7) in the descending process of the hot pressing plate, the first pressing assembly and the second pressing assembly are unlocked through the unlocking fixture block, so that the hot pressing plate can quickly tension and adjust the prepreg after hot pressing connection of the first splicing head and the second splicing head is completed, and automatic conveying of the prepreg is realized.

Aiming at the problems, the invention provides a continuous automatic processing and production process of prepreg, which comprises the steps of automatically cutting the connecting end parts of two pieces of prepreg to be connected to form a first splicing head and a second splicing head which are in rectangular toothed mutual inserting splicing matching through adding a hot pressing step, and synchronously hot-pressing the first splicing head and the second splicing head through a hot pressing mechanism to ensure that resin on the first splicing head and the second splicing head are subjected to hot melting and then compatible connection, thereby solving the technical problem of inconsistent thickness after splicing the prepreg.

A continuous automatic prepreg processing production process comprises the following steps:

step a), unreeling, namely horizontally conveying the reeled fiber yarns backwards to an impregnation device II along the production and processing direction of the prepreg after unreeling the reeled fiber yarns by an unreeling device I;

b) impregnating, wherein the fiber yarns conveyed to the impregnating device II pass through an impregnating mold arranged on the impregnating device II, the impregnating device II impregnates the fiber yarns with fluid thermosetting resin through the impregnating mold, and the thermosetting resin is attached to the fiber yarns to form prepreg blanks;

step c) die pressing, if the unwinding device I is not completely unwound, the prepreg output by the impregnation device II is conveyed backwards to a die pressing device III along the production and processing direction of the prepreg, the prepreg passes through the middle part of the die pressing device III, and the prepreg is output and rolled after the die pressing device III covers the upper surface and the lower surface of a prepreg blank with ethylene films;

step d) hot pressing, if the I part of the unreeling device is unreeled, the prepreg output by the impregnating device II is backwards conveyed to the IV part of the hot pressing device along the production and processing direction of the prepreg, and the head-tail connecting parts of the two adjacent groups of prepreg are connected in a hot pressing mode through the IV hot pressing device, and the hot pressing device comprises the following steps:

step one), performing coiling braking, namely replacing a next fiber yarn after an unwinding device I finishes unwinding a previous fiber yarn, removing traction after the end part of a prepreg close to the unwinding device I finishes impregnation and cooling, enabling a clamping roller assembly 41 in a hot-pressing device IV to lose the tension of the prepreg and slide downwards along an optical axis 413, and enabling the clamping roller assembly 41 and a second driving motor 421 to be separated from a transmission connection state;

step two), rotationally unlocking, namely, in the process that the clamping roller assembly 41 slides downwards along the optical axis 413, driving the T-shaped locking block 341 to lift upwards by extruding the lever 344, and releasing the locking and positioning of the first driven gear 333;

step three), performing primary rotation cutting, after the first driven gear 333 is unlocked and positioned, guiding the second splicing plate 311 to rotate through the pneumatic spring 315, and cutting the prepreg spread on the second splicing plate and the first cutter 312 in an inserting manner to form a rectangular toothed first splicing head 10 a;

step four), performing secondary rotary cutting, wherein after the prepreg on the second splice plate 311 is cut, the first drive motor 331 drives the second splice plate 311 to reversely rotate and reset, and the second cutter 313 performs penetrating cutting on the prepreg flatly laid on the first splice plate 22 to form a rectangular toothed second splice head 10 b;

step five), hot-pressing splicing, namely after the second splicing head 10b and the first splicing head 10a which are formed by cutting are spliced in an inserting way, a hot-pressing plate 12 presses the second splicing head 10b and the first splicing head 10a downwards, so that thermosetting resins on the second splicing head 10b are heated and are mutually compatible to form lap joint;

step six), tensioning and adjusting, after the second splicing head 10b and the first splicing head 10a are lapped, the hot pressing plate 12 is reset, the first pushing member 214 drives the movable guide roller 213 to move downwards, so that the prepreg is tensioned again, the clamping roller assembly 41 is lifted to restore transmission connection with the second driving motor 421 through tensioning of the prepreg, and the prepreg is conveyed backwards to the die pressing device III for die pressing treatment.

The process has the beneficial effects that:

(1) compared with the traditional hot-press bonding process of the prepreg, the hot-press bonding process of the prepreg has the advantages that the hot-press step is added, the connecting end parts of two prepregs to be connected are automatically cut to form the first splicing head and the second splicing head which are matched with each other in a penetrating and splicing mode and are in rectangular tooth shape, the first splicing head and the second splicing head are synchronously hot-pressed through the hot-press mechanism, the first splicing head and the second splicing head are subjected to compatibility after resin on the first splicing head and the second splicing head is hot-melted to form connection, the thickness consistency after splicing of the prepregs is kept, the subsequent continuous die pressing and reprocessing of the prepregs are facilitated, and.

In conclusion, the automatic splicing device has the advantages of automatic splicing, continuous rolling, consistent thickness after splicing and the like, and is particularly suitable for the technical field of prepreg production.

Drawings

FIG. 1 is a schematic perspective view of the present invention;

FIG. 2 is a schematic view of a partial front view structure of the present invention;

FIG. 3 is an enlarged view of the structure at B in FIG. 2;

FIG. 4 is a schematic perspective view of the tensioning mechanism of the present invention;

FIG. 5 is an enlarged view of the structure at A in FIG. 4;

FIG. 6 is an enlarged view of a broken structure of the first compressing assembly of the present invention;

FIG. 7 is a perspective view of a second positioning rod according to the present invention;

FIG. 8 is an enlarged view of a broken structure of the second hold-down assembly of the present invention;

FIG. 9 is an enlarged perspective view of a second hold-down assembly according to the present invention;

FIG. 10 is a perspective view of a fourth positioning rod according to the present invention;

FIG. 11 is a schematic view of an unlocking structure of the first hold-down assembly of the present invention;

FIG. 12 is a schematic view of a second hold-down assembly unlocking configuration of the present invention;

FIG. 13 is a cross-sectional view of the hot platen unlocking the first and second hold down assemblies of the present invention;

FIG. 14 is a perspective view of the cutting mechanism of the present invention;

FIG. 15 is a schematic perspective view of a second splice plate according to the present invention;

FIG. 16 is a schematic cross-sectional view of the cutting mechanism of the present invention;

FIG. 17 is a first perspective view of the conveying mechanism of the present invention;

FIG. 18 is a schematic view of a splicing structure of a first splice and a second splice according to the present invention;

FIG. 19 is a second perspective view of the conveying mechanism of the present invention;

FIG. 20 is a schematic view of a splicing structure of a first splice plate and a second splice plate according to the present invention;

FIG. 21 is a flow chart of a second process of the present invention.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

In the description of the present invention, it is to be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", and the like, indicate orientations and positional relationships based on those shown in the drawings, and are used only for convenience of description and simplicity of description, and do not indicate or imply that the equipment or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus, should not be considered as limiting the present invention.

Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of the present invention, "a plurality" means two or more unless specifically defined otherwise.

Example 1:

as shown in fig. 1, 2, 4, 14, 17 and 20, a continuous automatic prepreg processing production line sequentially includes, along a processing and conveying direction of a prepreg, an unwinding device i, an impregnation device ii, a molding device iii, and a hot-pressing device iv, where the hot-pressing device iv includes:

the hot pressing mechanism 1 comprises a hot pressing workbench 11 which is horizontally arranged, a hot pressing plate 12 which can be arranged in a lifting manner along the vertical direction is arranged right above the hot pressing workbench 11, heating wires are arranged in the hot pressing plate 12 along the length direction of the hot pressing plate, and the hot pressing plate 12 is used for carrying out hot pressing connection on the head and tail lap joints of adjacent prepreg;

the tensioning mechanism 2 is arranged in front of the hot pressing mechanism 1 along the prepreg processing and conveying direction and comprises a tensioning assembly 21, a first splicing plate 22 and a first pressing assembly 23, the tensioning assembly 21 is arranged close to the die pressing device III, the first splicing plate 22 is horizontally arranged between the tensioning assembly 21 and the hot pressing workbench 11, one end, overlapped with the hot pressing workbench 11, of the first splicing plate 22 is arranged in a rectangular tooth shape, and the first pressing assembly 23 is arranged on the first splicing plate 22 and used for pressing and fixing prepreg laid on the first splicing plate 22;

the cutting mechanism 3 is arranged behind the hot pressing mechanism 1 along the processing and conveying direction of the prepreg, the cutting mechanism 3 comprises a cutting component 31, a second pressing component 32, a rotating component 33 and a locking component 34, the cutting component 31 comprises a second splicing plate 311, a first cutter 312 and a second cutter 313, the second splicing plate 311 is rotatably arranged on an installation frame 310 through a pneumatic spring 315 which is symmetrically arranged, the second splicing plate 311 and one end, overlapped with the hot pressing workbench 11, of the hot pressing workbench are arranged in a zigzag mode and are in splicing fit with the first splicing plate 22, the first cutter 312 is arranged on the rotating path of the second splicing plate 311 through the installation frame 310 and is in corresponding penetrating fit with the tooth-missing part of the second splicing plate 311, the second cutter 313 is arranged at one end, corresponding to the splicing, of the second splicing plate 311 and the first splicing plate 22, of the second splicing plate 311 and the tooth-missing part of the first splicing plate 22 are in corresponding penetrating fit with the tooth-missing part of the first splicing plate 22, the second pressing components 32 are symmetrically arranged on two sides of the width direction of the second splicing plate 311 and are used for pressing and fixing prepreg laid on the second splicing plate 311, the rotating component 33 is arranged on one side of a rotating shaft of the second splicing plate 311 and is used for driving the second splicing plate 311 to rotate and reset, and the locking components 34 are symmetrically arranged on two sides of the rotating shaft of the second splicing plate 311 and are used for positioning and locking the reset second splicing plate 311; and

conveying mechanism 4, conveying mechanism 4 set up in cutting mechanism 3's rear, its including press from both sides the tight rod subassembly 41 that presss from both sides the liftable setting of preimpregnation material and drive the drive assembly 42 that preimpregnation material carried, press from both sides rod subassembly 41 rise with drive assembly 42 is the transmission connection setting, just press from both sides rod subassembly 41 descend with locking component 34 extrudees, removes locking component 34 is right the location locking of second splice plate 311.

The invention is characterized in that the fiber yarn for producing the prepreg is unreeled through the unreeling device I, the resin is pumped into the die through the resin pump after the resin is heated by the impregnating device II, when the fiber yarn passes through the die, the resin impregnates the fiber yarn to enable the resin to be attached to and permeate the fiber to form the prepreg, the upper surface and the lower surface of the prepreg are molded through the molding device III to cover the ethylene film, the molding effect is to enhance the strength of the prepreg, meanwhile, the air bubbles in the resin are discharged through the molding to cure and shape the prepreg, and the tensile shearing strength of the surface of the prepreg is enhanced through the ethylene film, wherein some prepregs can be produced without molding, and the molding can be replaced by winding, laying and other technologies.

It is further explained that, in the production process of the traditional prepreg, after a roll of fiber yarns is produced into the prepreg, another roll of new fiber yarns needs to be replaced, and the prepregs produced among different rolls of fiber yarns need to be connected by hand or a hot pressing machine, but the thickness of the connecting part is inevitably larger than that of other parts in the connecting process.

For the above technical problem, the prepreg to be lapped is cut into the first splicing head 10a and the second splicing head 10b which can be spliced in an inserting manner by the first cutter 312 and the second cutter 313, and the first splicing head 10a and the second splicing head 10b are spliced in a hot pressing manner by the hot pressing plate 12, so that the resins on the prepreg are mutually compatible after being hot-melted to form a stable connection interface layer, and the prepreg is connected with each other.

In the invention, when the prepreg is cut, the two side edges of the prepreg are respectively compressed and fixed by the first compressing assembly 23 and the second compressing assembly 32, so that the situation that the cut first splicing head 10a and the cut second splicing head 10b cannot be spliced due to the sliding of the prepreg in the cutting process is avoided.

In addition, in the process of replacing the fiber yarns by the unreeling device I, the produced prepreg loses traction after being molded by the molding device III, the tension force disappears, the clamping roller assembly 41 is separated from the driving assembly 42 in a transmission connection mode, so that the prepreg passing through the clamping roller assembly 41 temporarily loses the traction conveying of the rolling, the prepreg can be stopped for cutting, and meanwhile, the prepreg is driven to move backwards to the second splicing plate 311 by the falling of the clamping roller assembly 41.

As shown in fig. 4, 5, 6 and 7, as a preferred embodiment, the first pressing assembly 23 includes:

the second pushing member 231 is arranged at the top of the first splicing plate 22 and is used for vertically pushing, and the pushing end of the second pushing member 231 is connected with a horizontally arranged pushing plate 232;

the first positioning rods 233 are symmetrically and vertically arranged at two ends of the first splicing plate 22 in the width direction, a first pressing block 2331 is arranged at the part of each first positioning rod 233 above the first splicing plate 22, a triangular first guide block 2332 is arranged at the part of each first positioning rod 233 below the first splicing plate 22, and a first elastic piece 234 is arranged between each first pressing block 2331 and the first splicing plate 22 in a propping manner; and

the second positioning rods 235 are symmetrically and horizontally arranged at two ends of the first splicing plate 22 in the width direction, are arranged in a one-to-one correspondence manner with the first positioning rods 233, and are provided with triangular first clamping blocks 2351 at one end opposite to the first guide block 2332, conical second clamping blocks 2352 are arranged at one end, opposite to the first guide block 2332, of the first clamping blocks 2351, first clamping openings 2353 clamped with the first positioning rods 233 are arranged on the first clamping blocks 2351, the inclined surface of each first clamping block 2351 is in sliding fit with the inclined surface of the first guide block 2332, the second clamping blocks 2352 are correspondingly clamped with the unlocking clamping blocks 121, and second elastic pieces 236 in compression arrangement are sleeved on the second positioning rods 235.

As shown in fig. 8, 9, 10 and 14, further, the second pressing assembly 32 includes:

the top blocks 321 are symmetrically arranged on two sides of the second splicing plate 311, and are fixedly connected with the mounting rack 310;

the third positioning rods 322 are symmetrically and vertically arranged at two ends of the second splicing plate 311 in the width direction, rotate along with the second splicing plate 311, and are in extrusion contact with the top block 321, a second pressing block 3221 is arranged at a part of each third positioning rod 322 above the second splicing plate 311, a second guide block 3222 in a triangular shape is arranged at a part of each third positioning rod 322 below the second splicing plate 311, and a third elastic element 323 is arranged between each second pressing block 3221 and the second splicing plate 311 in a propping manner; and

the fourth positioning rods 324 are symmetrically and horizontally arranged at two ends of the second splicing plate 311 in the width direction, are arranged in a one-to-one correspondence with the third positioning rods 322, and are provided with triangular third clamping blocks 3241 at one ends facing the second guide blocks 3222, one ends of the third clamping blocks 3241, which are back to the second guide blocks 3222, are provided with conical fourth clamping blocks 3242, the third clamping blocks 3241 are provided with second clamping ports 3243 which are clamped with the third positioning rods 322, the inclined surface of the third clamping blocks 3241 is in sliding fit with the inclined surface of the second guide blocks 3222, the fourth clamping blocks 3242 are correspondingly clamped with the unlocking clamping blocks 121, and the fourth positioning rods 324 are sleeved with fourth elastic members 325 which are arranged in a compression manner.

It should be noted that, in the present invention, the second pushing member 231 is controlled by the sensor located near the second pushing member 231, when the sensor senses that the end of the prepreg is conveyed to the position of the prepreg, the sensor sends a signal to the central control box, the central control box drives the second pushing member 231 to drive the pushing plate 232 to squeeze the first positioning rod 233 through the signal, so that the first pressing block 2331 on the first positioning rod 233 presses the two side edges of the prepreg on the first splicing plate 22, and in the process that the first positioning rod 233 is pressed down, the first guiding block 2332 on the first positioning rod 233 and the first clamping block 2351 on the second positioning rod 235 are squeezed through the inclined plane, so that the first clamping block 2351 is forced to be retracted, and then the first positioning rod 233 is clamped by the first bayonet 2353 to achieve positioning.

It is further explained that the working principle of the second pressing component 32 is similar to that of the first pressing component 23, and the third positioning rod 322 and the top block 321 are driven to extrude through the second splicing plate 311 in the rotating process, so that the third positioning rod 322 is compressed, and two side edges of the prepreg are fixed.

It should be further noted that, in the present invention, the rotation angle of the second splicing plate 311 is 60-75 °, and in this angle, before the second splicing plate 311 rotates and the second compacting assembly 32 is not compacted, the prepreg on the second splicing plate 311 still lays on the second splicing plate 311 and cannot slide down, and the cut end thereof cannot be lifted up due to gravity.

As shown in fig. 11, 12 and 13, as a preferred embodiment, unlocking blocks 121 are disposed at four corners of the horizontal plane of the hot press plate 12, the unlocking blocks 121 are respectively engaged with the first pressing component 23 and the second pressing component 32, and a U-shaped unlocking bayonet 122 is disposed thereon.

It should be noted that in the present invention, during the process of pressing down the first splicing head 10a and the second splicing head 10b by descending the hot press plate 12, the second positioning rod 235 and the fourth positioning rod 324 are respectively pulled to move backward by the engagement of the unlocking fixture block 121 with the second fixture block 2352 in the first pressing assembly 23 and the fourth fixture block 3242 in the second pressing assembly 32, so as to release the locking of the first positioning rod 233 and the third positioning rod 322, so that the hot press plate 12 can tension, adjust, recover, roll and convey the prepreg to the first splicing head 10a and the second splicing head 10b after hot press splicing.

As a preferred embodiment, as shown in fig. 14, the rotating assembly 33 includes:

the first driving motor 331 is arranged on one axial side of a rotating shaft of the second splicing plate 311, and a motor shaft of the first driving motor 331 is sleeved with a first driving gear 332; and

and the first driven gear 333 is arranged on the rotating shaft of the second splicing plate 311, and is in meshing transmission connection with the first driving gear 332.

As shown in fig. 2, 3 and 17, further, the locking assembly 34 includes:

the T-shaped locking block 341 is vertically arranged right above the first driven gear 333 by sliding along a guide rod 342, and is clamped with the first driven gear 333;

the fifth elastic member 343, the fifth elastic member 343 is sleeved on the guide rod 342, is compressed, and extrudes the T-shaped locking block 341; and

and the lever 344 is hinged to the mounting frame 310, one end of the lever 344 is sleeved with the T-shaped locking block 341 through a kidney-shaped groove 345, and the other end of the lever 344 is arranged under the clamping roller assembly 41 in a swinging mode.

It should be noted that, initially, the T-shaped locking block 341 and the first driven gear 333 are in a locked and positioned state of being engaged, the second splicing plate 311 cannot rotate, and when the clamping roller assembly 41 and the driving assembly 42 are disengaged from each other due to the tension of the prepreg, the clamping roller assembly 41 presses down the lever 344, and the lever 344 drives the T-shaped locking block 341 to move upward, so as to release the locked and positioned state of the first driven gear 333, and thus the second splicing plate 311 is in a free rotation state.

It is further described that, after the second splicing plate 311 rotates to cut the prepreg thereon to form the first splicing head 10a, the second splicing plate 311 needs to be reset, the first driving motor 331 drives the second splicing plate 311 to reset, then the hot pressing plate 12 is used to press the second splicing plate 311 on the hot pressing workbench 11, and in the process that the hot pressing plate 12 completes hot pressing splicing and resetting of the first splicing head 10a and the second splicing head 10b, the tensioning assembly 21 rapidly adjusts the tensioning force of the prepreg to reset the clamping roller assembly 41, so that the T-shaped locking block 341 is locked with the first driven gear 333 again, thereby preventing the second splicing plate 311 from rotating.

As shown in fig. 17, as a preferred embodiment, the clamping and roll assembly 41 includes:

the clamping rollers 411 are arranged in a parallel and rotating mode, and prepreg is conveyed between the two clamping rollers 411;

the cross guide blocks 412 are symmetrically arranged at two axial ends of the clamping rod 411, are sleeved on the clamping rod 411 and are vertically arranged in a lifting manner;

a plurality of optical axes 413, wherein the optical axes 413 are symmetrically and vertically arranged at two axial ends of the clamping rod 411 and guide the vertical lifting of the cross-shaped guide block 412; and

a plurality of elastic pads 414, the elastic pads 414 are sleeved on the bottom of the optical axis 413, and buffer the cross guide block 412.

Further, the driving assembly 42 includes:

a second driving motor 421, wherein the second driving motor 421 is arranged on any side of the clamping roller 411 in the axial direction;

the gear transmission set 422 is arranged on the clamping roller 411, and the gear transmission set 422 and the second driving motor 421 are both positioned on the same side of the clamping roller 411 in the axial direction;

the driving gear 423 is disposed on the second driving motor 421, sleeved on a motor shaft of the second driving motor 421, and engaged with the gear transmission set 422 for transmission.

It should be noted that, in the present invention, the clamping roller 411 is made of a light material with a low density, such as aluminum, plastic, etc., so that the distance from the pivot point of the lever 344 to the clamping roller 411 is far greater than the distance from the clamping roller to the T-shaped locking block 341, so that the clamping roller 411 can drive the T-shaped locking block 341 to unlock with a small mass.

As a preferred embodiment, as shown in fig. 19, the tension assembly 21 includes:

a bracket 211;

the fixed guide roller 212 is rotatably erected at the top of the bracket 211;

the movable guide roller 213, the movable guide roller 213 with fixed guide roller 212 parallel arrangement, it is located under fixed guide roller 212, and its both ends are through first propelling movement piece 214, follow the vertical direction lift setting of support 211.

It should be noted that after the hot-pressing board 12 completes the hot-pressing splicing of the first splicing head 10a and the second splicing head 10b, the movable guide roller 213 is pulled down by the first pushing member 214 to drive the prepreg to be tensioned again, the clamping roller 411 is adjusted to be in transmission connection with the driving assembly 42 again by the tensioning force, and the prepreg is driven to be conveyed backwards and rolled up by the opposite rotation of the clamping roller 411.

Example 2:

a continuous automatic prepreg manufacturing process according to embodiment 2 of the present invention will be described with reference to embodiment 1.

As shown in fig. 21, a continuous automatic prepreg processing and producing process includes the following steps:

step four), performing secondary rotary cutting, wherein after the prepreg on the second splice plate 311 is cut, the first drive motor 331 drives the second splice plate 311 to reversely rotate and reset, and the second cutter 313 performs penetrating cutting on the prepreg flatly laid on the first splice plate 22) to form a rectangular toothed second splice head 10 b;

In the third step and the fourth step of the invention, the prepreg is respectively fixed on the first splicing plate 22 and the second splicing plate 311 through the first compacting component 23 and the second compacting component 32, so that the prepreg in the cutting process can not move.

Further, it is described that, in the third step and the fourth step, the first pressing assembly 23 and the second pressing assembly 32 lock and fix the prepreg, and when the hot pressing plate 12 descends to hot press the second splicing head 10b and the first splicing head 10a in the fifth step, the second positioning rod 235 and the fourth positioning rod 324 are respectively pulled to move backwards by pressing the unlocking fixture block 121 fixedly arranged on the hot pressing plate 12, so as to unlock the first positioning rod 233 and the third positioning rod 322.

It is further noted that, in the fifth step, the hot press plate 12 is used to connect the second splice 10b and the first splice 10a in a hot press manner, and the hot press plate 12 is used to carry heat and pressure to heat and melt the resin covering the parts of the second splice 10b and the first splice 10a by the hot press plate 12, so that the resin recovers flowable property after hot melting, and a relatively stable connection interface is formed between the second splice 10b and the splice of the first splice 10a under the pressure of the hot press plate 12 by using the mutual flow and diffusion between the flowable resin, thereby realizing the continuity of the prepreg.

The surface tension of the resin is generated due to imbalance of intermolecular forces, and the interfacial tension between prepregs is an intermolecular force generated at the interface of two polymers. From the thermodynamic point of view, it is firstly the contact between two phases of the prepreg, and then the interdiffusion between macromolecular chains of two polymers, i.e. the local diffusion of the polymer molecules from one phase to the other phase, reduces the interfacial tension of the contact area, forms a connected bonding area, when the compatibility of two polymers is increased, the interdiffusion degree between the chain segments is increased, forms a fuzzy two-phase connection interface, and when the compatibility is complete, forms a stable homogeneous system, increases the bonding force of the connection interface, while the resin is the polymer, the prepreg connected with each other is two phases, the heat and pressure of the hot-pressing plate 12 are the conditions for increasing the compatibility of the polymers and increasing the interdiffusion degree between the chain segments.

It is noted that, in the present invention, the upper and lower surfaces of the prepreg are covered with the vinyl film by the molding step in step d), and the tensile strength and shear strength of the surface of the prepreg at the joint are increased by the tension of the vinyl film.

The working process is as follows:

firstly, unreeling a fiber yarn in a cylinder by an unreeling device I, horizontally conveying the fiber yarn to a dipping device II along the production and processing direction of prepreg, then enabling the fiber yarn conveyed to the dipping device II to pass through a dipping die arranged on the dipping device II, dipping the fiber yarn by the dipping die by the dipping device II to form a prepreg blank, cooling the prepreg blank after dipping, carrying out hot-pressing connection on head and tail connecting parts of two adjacent groups of prepreg by a hot-pressing device IV, replacing the next fiber yarn after the unreeling of the last fiber yarn by the unreeling device I, losing traction after the end part of the prepreg close to the unreeling device I is molded, enabling a clamping roller assembly 41 in the hot-pressing device IV to lose the tension of the prepreg and slide downwards along an optical axis 413, and enabling the clamping roller assembly 41 to be separated from the transmission connection state with a second driving motor 421, in the process that the clamping roller component 41 slides downwards along the optical axis 413, the lever 344 is squeezed to drive the T-shaped locking block 341 to lift upwards to release the locking and positioning of the first driven gear 333, after the locking and positioning of the first driven gear 333 is released, the second splicing plate 311 rotates under the guidance of the pneumatic spring 315, the prepreg flatly laid on the second splicing plate 311 and the first cutter 312 are penetrated and cut to form a rectangular toothed first splicing head 10a, after the prepreg on the second splicing plate 311 is cut, the first driving motor 331 drives the second splicing plate 311 to rotate reversely and reset, the second cutter 313 penetrates and cuts the prepreg flatly laid on the first splicing plate 22 to form a rectangular toothed second splicing head 10b, after the second splicing head 10b and the first splicing head 10a which are formed by cutting are spliced in an inserting manner, the hot pressing plate 12 presses the second splicing head 10b and the first splicing head 10a downwards to enable thermosetting resin on the second splicing head to be mutually compatible and form lap joint after being heated, after the second splicing head 10b and the first splicing head 10a are lapped, the hot pressing plate 12 resets, the first pushing piece 214 drives the movable guide roller 213 to move downwards to enable the prepreg to be tensioned again, and the clamping roller assembly 41 rises to recover transmission connection with the second driving motor 421 through tensioning of the prepreg; and the prepreg output by the hot-pressing device IV is conveyed backwards to the mould pressing device III along the production and processing direction of the prepreg, the prepreg passes through the middle part of the mould pressing device III, and the prepreg is output and rolled after the mould pressing device III covers the upper surface and the lower surface of a prepreg blank with ethylene films.

The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the invention, and any modifications, equivalents and improvements made within the spirit and principle of the present invention are intended to be included within the scope of the present invention.

Claims

1. The utility model provides a continuous type preimpregnation material automatic processing production line, along the processing direction of delivery of preimpregnation material, include unwinding device (I), saturating device (II), molding device (III) in proper order, its characterized in that, still including set up in hot press unit (IV) between saturating device (II) and molding device (III), hot press unit (IV) includes:

the hot pressing mechanism (1) comprises a hot pressing workbench (11) which is horizontally arranged, a hot pressing plate (12) which can be arranged in a lifting mode along the vertical direction is arranged right above the hot pressing workbench (11), heating wires are arranged in the hot pressing plate (12) along the length direction of the hot pressing plate, and the hot pressing plate (12) is used for carrying out hot pressing connection on the head and tail lap joints of adjacent prepregs;

the tensioning mechanism (2) is arranged in front of the hot pressing mechanism (1) along the processing and conveying direction of the prepreg and comprises a tensioning assembly (21), a first splicing plate (22) and a first pressing assembly (23), the tensioning assembly (21) is arranged close to the impregnation device (II), the first splicing plate (22) is horizontally arranged between the tensioning assembly (21) and the hot pressing workbench (11), one end, overlapped with the hot pressing workbench (11), of the first splicing plate (22) is arranged in a rectangular tooth shape, and the first pressing assembly (23) is arranged on the first splicing plate (22) and is used for pressing and fixing the prepreg laid on the first splicing plate (22);

the cutting mechanism (3) is arranged behind the hot pressing mechanism (1) along the processing and conveying direction of the prepreg and comprises a cutting component (31), a second pressing component (32), a rotating component (33) and a locking component (34), the cutting component (31) comprises a second splicing plate (311), a first cutter (312) and a second cutter (313), the second splicing plate (311) is rotatably arranged on an installation frame (310) through a pneumatic spring (315) which is symmetrically arranged, the second splicing plate and the hot pressing workbench (11) are in a zigzag arrangement, the first cutter (312) is in a splicing and matching arrangement with the first splicing plate (22), the first cutter (312) is arranged on the rotating path of the second splicing plate (311) through the installation frame (310) and is correspondingly and alternately matched with the tooth-lacking part of the second splicing plate (311), the second cutter (313) is arranged at one end of the second splicing plate (311) which is correspondingly spliced with the first splicing plate (22), and is correspondingly penetrated and matched with the tooth-missing part of the first splicing plate (22), the second pressing components (32) are symmetrically arranged at two sides of the second splicing plate (311) in the width direction and are used for pressing and fixing prepreg laid on the second splicing plate (311), the rotating component (33) is arranged at one side of a rotating shaft of the second splicing plate (311) and is used for driving the second splicing plate (311) to rotate and reset, the locking components (34) are symmetrically arranged at two sides of the rotating shaft of the second splicing plate (311) and are used for positioning and locking the reset second splicing plate (311); and

conveying mechanism (4), conveying mechanism (4) set up in the rear of cutting mechanism (3), its including press from both sides tight rod subassembly (41) that the prepreg liftable set up and drive assembly (42) that prepreg carried, press from both sides rod subassembly (41) rise with but drive assembly (42) transmission connection sets up, just press from both sides rod subassembly (41) descend with locking component (34) extrusion relieves locking component (34) are right the location locking of second splice plate (311).

2. The continuous automatic prepreg processing production line according to claim 1, wherein unlocking blocks (121) are arranged at four corners of the horizontal plane of the hot pressing plate (12), the unlocking blocks (121) are respectively clamped with the first pressing assembly (23) and the second pressing assembly (32), and a U-shaped unlocking bayonet (122) is arranged on the unlocking blocks.

3. A continuous automatic prepreg processing line according to claim 1, characterized in that said tensioning assembly (21) comprises:

a bracket (211);

the fixed guide roller (212) is rotatably erected at the top of the bracket (211);

the movable guide roller (213), movable guide roller (213) with fixed guide roller (212) parallel arrangement, it is located under fixed guide roller (212), and its both ends are passed through first propelling movement spare (214), follow the vertical direction lift setting of support (211).

4. A continuous automatic prepreg processing line according to claim 2, characterized in that said first compacting assembly (23) comprises:

the second pushing piece (231) is arranged at the top of the first splicing plate (22) and is vertically pushed, and the pushing end of the second pushing piece (231) is connected with a horizontally arranged pushing plate (232);

the first positioning rods (233) are symmetrically and vertically arranged at two ends of the first splicing plate (22) in the width direction, a first pressing block (2331) is arranged on the portion of each first positioning rod (233) above the first splicing plate (22), a triangular first guide block (2332) is arranged on the portion of each first positioning rod below the first splicing plate (22), and a first elastic piece (234) is arranged between each first pressing block (2331) and the first splicing plate (22) in a propping manner; and

the second positioning rods (235) are symmetrically and horizontally arranged at two ends of the first splicing plate (22) in the width direction, the second positioning rods (235) are arranged in a one-to-one correspondence mode and are opposite to one end of the first guide block (2332) and are provided with triangular first clamping blocks (2351), one end, back to the first guide block (2332), of each first clamping block (2351) is provided with a conical second clamping block (2352), the first clamping blocks (2351) are provided with first clamping openings (2353) clamped with the first positioning rods (233), the inclined surfaces of the first clamping blocks (2351) are in sliding fit with the inclined surfaces of the first guide block (2332), the second clamping blocks (2352) are correspondingly clamped with the unlocking clamping blocks (121), and the second positioning rods (235) are sleeved with second elastic pieces (236) arranged in a compression mode.

5. A continuous automatic prepreg processing line according to claim 2, characterized in that said second compacting assembly (32) comprises:

the top blocks (321) are symmetrically arranged on two sides of the second splicing plate (311) and fixedly connected with the mounting rack (310);

the third positioning rods (322) are symmetrically and vertically arranged at two ends of the second splicing plate (311) in the width direction, rotate along with the second splicing plate (311) and are in extrusion contact with the top block (321), a second pressing block (3221) is arranged on the part of the third positioning rods (322) above the second splicing plate (311), a triangular second guide block (3222) is arranged on the part of the third positioning rods (322) below the second splicing plate (311), and a third elastic piece (323) is arranged between the second pressing block (3221) and the second splicing plate (311) in an abutting mode; and

the fourth positioning rods (324) are symmetrically and horizontally arranged at two ends of the second splicing plate (311) in the width direction, are arranged in a one-to-one correspondence manner with the third positioning rods (322), a triangular third clamping block (3241) is arranged at one end of the fourth positioning rod (324) opposite to the second guide block (3222), a conical fourth clamping block (3242) is arranged at one end of the third clamping block (3241) opposite to the second guide block (3222), a second bayonet (3243) clamped with the third positioning rod (322) is arranged on the third clamping block (3241), an inclined surface of the third clamping block (3241) is in sliding fit with an inclined surface of the second guide block (3222), the fourth clamping block (3242) is correspondingly clamped with the unlocking clamping block (121), and a fourth elastic element (325) in a compression manner is sleeved on the fourth positioning rod (324).

6. A continuous automatic prepreg processing line according to claim 1, characterized in that said rotating assembly (33) comprises:

the first driving motor (331), the first driving motor (331) is arranged on one side of the second splice plate (311) in the axial direction of the rotating shaft, and a first driving gear (332) is sleeved on a motor shaft of the first driving motor (331); and

the first driven gear (333) is arranged on a rotating shaft of the second splicing plate (311) and is in meshed transmission connection with the first driving gear (332).

7. A continuous automated prepreg processing line as claimed in claim 6, wherein said locking assembly (34) comprises:

the T-shaped locking block (341) is vertically arranged above the first driven gear (333) in a sliding manner along a guide rod (342), and is clamped with the first driven gear (333);

the fifth elastic piece (343), the said fifth elastic piece (343) is fixed on said guide arm (342) in a sleeving manner, it is compressed and set up, and it squeezes the said T-shaped locking block (341); and

the lever (344) is hinged to the mounting frame (310), one end of the lever is sleeved with the T-shaped locking block (341) through a kidney-shaped groove (345), and the other end of the lever is arranged under the clamping roller assembly (41) in a swinging mode.

8. A continuous automatic prepreg processing line according to claim 1, characterized in that said nip-roller assembly (41) comprises:

the prepreg feeding device comprises clamping rollers (411), wherein the clamping rollers (411) are arranged in parallel in a rotating mode, and prepreg is conveyed between the two clamping rollers (411);

the cross guide blocks (412) are symmetrically arranged at two axial ends of the clamping roller (411), sleeved on the clamping roller (411) and vertically arranged in a lifting manner;

the optical axes (413) are symmetrically and vertically arranged at two axial ends of the clamping roller (411) and guide the vertical lifting of the cross-shaped guide block (412); and

the elastic pads (414) are sleeved at the bottom of the optical axis (413) and buffer the cross guide block (412).

9. A continuous automated prepreg processing line as claimed in claim 8, wherein said drive assembly (42) comprises:

the second driving motor (421), the said second driving motor (421) is set up on any side of the said nip roller (411) axially;

the gear transmission set (422) is arranged on the clamping roller (411), and the gear transmission set (422) and the second driving motor (421) are both positioned on the same side of the clamping roller (411) in the axial direction;

the driving gear (423) is arranged on the second driving motor (421), sleeved on a motor shaft of the second driving motor (421) and in meshed transmission with the gear transmission set (422).

10. A process for manufacturing a continuous automatic prepreg manufacturing line according to any one of claims 1 to 9, comprising the following steps:

step a), unreeling, namely horizontally conveying the reeled fiber yarns backwards to an impregnation device (II) along the production and processing direction of the prepreg after unreeling the reeled fiber yarns by an unreeling device (I);

b) impregnating, wherein the fiber yarns conveyed to the impregnating device (II) pass through an impregnating mold arranged on the impregnating device (II), the impregnating device (II) impregnates the fiber yarns with fluid thermosetting resin through the impregnating mold, and the thermosetting resin is adhered to the fiber yarns to form a prepreg blank;

step c), die pressing, if the unreeling device (I) is not unreeled, the prepreg output by the impregnation device (II) is backwards conveyed to a die pressing device (III) along the production and processing direction of the prepreg, the prepreg passes through the middle part of the die pressing device (III), and the prepreg is output and rolled after the die pressing device (III) covers the upper surface and the lower surface of a prepreg blank with ethylene films;

step d) hot pressing, if the unreeling device (I) is completely unreeled, the prepreg output by the impregnating device (II) is backwards conveyed to a hot pressing device (IV) along the production and processing direction of the prepreg, and the head and tail connecting parts of the two adjacent groups of prepregs are connected in a hot pressing mode through the hot pressing device (IV), and the hot pressing device comprises the following steps:

the method comprises the following steps that firstly, coiling braking is carried out, after an unreeling device (I) finishes unreeling a previous fiber yarn, a next fiber yarn is replaced, the end part, close to the unreeling device (I), of a prepreg loses traction after impregnation and cooling, a clamping roller assembly (41) in a hot pressing device (IV) loses the tensile force of the prepreg and slides downwards along an optical axis (413), and the clamping roller assembly (41) is separated from a second driving motor (421) in a transmission connection state;

step two), rotationally unlocking, wherein in the process that the clamping roller assembly (41) slides downwards along the optical axis (413), the T-shaped locking block (341) is driven to lift upwards by extruding the lever (344), and the locking and positioning of the first driven gear (333) are released;

step three), performing primary rotation cutting, after the locking and positioning of the first driven gear (333) are released, guiding the second splicing plate (311) to rotate through a pneumatic spring (315), and penetrating and cutting the prepreg spread on the second splicing plate and the first cutter (312) to form a rectangular toothed first splicing head (10 a);

step four), secondary rotary cutting is carried out, after the prepreg on the second splicing plate (311) is cut, the first driving motor (331) drives the second splicing plate (311) to rotate reversely and reset, and the second cutter (313) cuts the prepreg which is paved on the first splicing plate (22) in an inserting manner to form a rectangular toothed second splicing head (10 b);

step five), hot-pressing splicing, namely after the second splicing head (10b) and the first splicing head (10a) which are formed by cutting are spliced in an inserting way, a hot-pressing plate (12) presses the second splicing head (10b) and the first splicing head (10a) downwards, so that thermosetting resin on the second splicing head (10b) and the first splicing head (10a) are heated and are mutually compatible to form lap joint;

and step six), tensioning and adjusting, namely after the second splicing head (10b) and the first splicing head (10a) are lapped, resetting the hot pressing plate (12), driving the movable guide roller (213) to move downwards by the first pushing member (214), tensioning the prepreg again, lifting the clamping roller assembly (41) to restore transmission connection with the second driving motor (421) through tensioning of the prepreg, and conveying the prepreg backwards to the mould pressing device (III) for mould pressing treatment.