CN115570708A

CN115570708A - Low-surface-density thermoplastic prepreg production equipment and production process thereof

Info

Publication number: CN115570708A
Application number: CN202211216577.7A
Authority: CN
Inventors: 史丽娟; 孙攀
Original assignee: Jiangsu Hengbo Composite Material Co ltd
Current assignee: Jiangsu Hengbo Composite Material Co ltd
Priority date: 2022-09-30
Filing date: 2022-09-30
Publication date: 2023-01-06
Anticipated expiration: 2042-09-30
Also published as: CN115570708B

Abstract

The invention provides a production device and a production process of a low-surface-density thermoplastic prepreg, wherein the production device comprises a creel, a filament collecting plate, a filament spreading device, an extruder, a soaking mould, a felt placing device, an infrared heating device, a shaping roller, a traction roller and a winding device which are sequentially arranged along the direction of a production line, a tensioning roller is arranged in the creel along the feeding direction of a plurality of reinforcing materials, the tensioning roller enables the plurality of reinforcing materials to be in a W shape after tensioning, a polishing roller positioned above the tensioning roller is also arranged in the creel, the polishing roller enables the thicknesses of the plurality of reinforcing materials to be consistent, a plurality of fixed buckling seats are also arranged in the creel along the feeding direction of the reinforcing materials, the fixed buckling seats and the reinforcing materials are in one-to-one correspondence, the fixed buckling seats are fixed in the creel through connecting rods, a movable buckling seat is connected to any one of the fixed buckling seats in a sliding manner along the feeding direction of the reinforcing materials, and a pressure sensor is arranged between the movable buckling seat and the fixed buckling seats.

Description

Low-surface-density thermoplastic prepreg production equipment and production process thereof

Technical Field

The invention relates to the technical field of new materials, in particular to low-surface-density thermoplastic prepreg production equipment and a production process thereof.

Background

The prepreg is a material obtained by impregnating a resin matrix into reinforcing fibers. The material has both resin matrix and reinforcing body, and is one kind of intermediate material with strengthened performance. And the prepreg includes a thermosetting prepreg and a thermoplastic prepreg according to the category of the resin matrix.

The method for producing the thermoplastic prepreg at present, particularly the method for producing the uniform thermoplastic prepreg, generally comprises the steps of introducing a reinforcing material from a creel (1) through a filament collecting plate (2) into a yarn spreading device (3) for yarn spreading treatment, conveying the reinforcing material to a rear part for forming, pressing and impregnating a layer of resin film on each side of the reinforcing material through an extruder (4) and an infiltration mold (5) to form the high-thickness double-film prepreg, and rolling and compounding a surfacing mat wound on a mat placing device (6) on the outer side of the resin film to improve the surface defect of the prepreg and enable the resin distribution to be more uniform. Then leading out by an infrared heating device (7) and a sizing roller (8) through a traction roller (9), and rolling the prepared thermoplastic prepreg with high thickness uniformity by a rolling device (10). The production station process is as shown in figure 1.

It is seen that a reinforcing material impregnated with a resin matrix has good strength, but with the progress of the manufacturing process, higher requirements are imposed on both strength and moldability. If the strength and the plasticity are considered, the toughness of the combination of the strength and the plasticity becomes a key index. Therefore, based on the existing thermoplastic production process, how to produce the prepreg with higher tenacity, namely how to produce the low-surface density thermoplastic prepreg becomes a technical problem to be broken through urgently.

Disclosure of Invention

The invention aims to solve the technical problem of how to produce a low-areal density thermoplastic prepreg with higher toughness, and provides production equipment and a production process of the low-areal density thermoplastic prepreg.

The invention has the technical scheme that the low-surface-density thermoplastic prepreg production equipment comprises a creel, a filament collecting plate, a filament spreading device, an extruder, a soaking die, a felt placing device, an infrared heating device, a shaping roller, a traction roller and a winding device which are sequentially arranged along the direction of a production line, wherein the creel is internally provided with a tensioning roller along the feeding direction of a plurality of reinforcing materials, the tensioning roller enables the plurality of reinforcing materials to be in a W shape after tensioning, the creel is internally also provided with a polishing roller positioned above the tensioning roller, the polishing roller enables the thicknesses of the plurality of reinforcing materials to be consistent, the creel is internally provided with a plurality of fixed buckling seats along the feeding direction of the reinforcing materials, the fixed buckling seats and the reinforcing materials are in one-to-one correspondence, the fixed buckling seats are fixed in the creel through connecting rods, and a movable buckling seat is connected to any one of the fixed buckling seats in a sliding manner along the feeding direction of the reinforcing materials, a pressure sensor is arranged between the movable buckle seat and the fixed buckle seat, a buckle plate capable of being turned upwards is hinged on the movable buckle seat, first connecting lugs are arranged on the buckle plate, hollow turning rods are arranged in the first connecting lugs in a penetrating manner, one end of each hollow turning rod is provided with a linear connecting bulge, the other end of each hollow turning rod is provided with a linear connecting groove, each hollow turning rod is sequentially connected end to end so that the buckle plates on the movable buckle seats can be synchronously buckled to fix the reinforcing material, a first turning driving rod and a second turning driving rod are respectively arranged on two sides in the creel, a linear connecting chute matched with the hollow turning rod on one side is arranged at the end part of the first turning driving rod, and a linear connecting sliding block matched with the hollow turning rod on the other side is arranged at the end part of the second turning driving rod, the hollow turnover rods are connected through elastic line bodies, and when the pinch plate is buckled and fixed with the reinforcing material, the movable directions of the connecting protrusions, the connecting grooves, the connecting sliding grooves and the connecting sliding blocks are the same as the feeding direction of the reinforcing material; the creel is interior along reinforcing material's direction of feed still is equipped with a plurality of activities and detains and draws the seat, the activity is detained and is drawn the seat with reinforcing material one-to-one is in order to fix reinforcing material, the activity is detained and is drawn the seat and is in behind the buckle lock draw along reinforcing material's direction of feed can make a plurality of pressure sensor detects each correspondence reinforcing material's the atress condition.

As an embodiment, the tension roller includes a positioning main roller, a first pressing auxiliary roller, and a second pressing auxiliary roller, the first pressing auxiliary roller and the second pressing auxiliary roller are respectively located on both sides of the positioning main roller and are located at positions lower than the positioning main roller.

In one embodiment, the creel is provided with first lifting grooves on two sides, and the grinding roller can move along the first lifting grooves to grind the reinforcing materials with different thicknesses.

As an implementation mode, a second connecting lug is arranged at the bottom of the fixing buckle seat, and the second connecting lugs are fixed in series through the connecting rod.

As an implementation mode, the cross sections of the fixed buckle seat and the movable buckle seat are both in a U shape, slots are arranged on two sides of the fixed buckle seat, the direction of the slots is along the feeding direction of the reinforcing material, and inserting rods are arranged on two sides of the movable buckle seat and matched with the slots.

As an implementation manner, a first via hole connected with the hollow portion of the hollow turnup rod connected with the first turnover driving rod is formed in the hollow turnup rod connected with the second turnover driving rod, a second via hole connected with the hollow portion of the hollow turnup rod connected with the second turnover driving rod is formed in the hollow turnup rod connected with the second turnover driving rod, the elastic line body is connected in series with each hollow turnup rod, after one end of the elastic line body penetrates through the first via hole, the elastic line body is connected with the first turnover driving rod, and after the other end of the elastic line body penetrates through the second via hole, the elastic line body is connected with the second turnover driving rod.

As an implementation mode, the movable buckle-pull seat comprises an upper pull seat and a lower pull seat, a plurality of the upper pull seats are connected in series through an upper pull rod, a second lifting groove and a first transverse pull groove are arranged on two sides in the creel, the second lifting groove is connected with the first transverse pull groove, a plurality of the lower pull seats are connected in series through a lower pull rod, a second transverse pull groove is arranged on two sides in the creel, and the second transverse pull groove is parallel to the first transverse pull groove; and the upper pull rod descends along the second lifting groove to press the upper pull seat and the lower pull seat, and then the upper pull rod and the lower pull seat respectively pull the reinforcing material along the feeding direction of the reinforcing material along the first transverse pull groove and the second transverse pull groove.

In one embodiment, the upper pull rod and the lower pull rod are connected through a compression spring.

As an embodiment, a plurality of positioning ring grooves are formed on the positioning main roller, the positioning ring grooves correspond to the reinforcing materials one by one, the positioning ring grooves are formed by enclosing a plurality of tensioning blocks which are uniformly distributed in the circumferential direction, the depth of the positioning ring grooves can be changed by the inward and outward contraction and extension of the tensioning blocks, a downward pressing and shaping device is further arranged in the creel along the feeding direction of the reinforcing materials, and the reinforcing materials pass through the downward pressing and shaping device; when the pressure sensor detects that the corresponding reinforcing material does not reach a stress set value and breaks, the tensioning blocks corresponding to the reinforcing material retract inwards to increase the depth of the positioning ring groove, and when the movable buckle pulling seat pulls the reinforcing material, the downward pressing and shaping device presses the reinforcing material to enable the thicknesses of the reinforcing materials to be consistent.

According to another technical scheme, the production process of the low-areal-density thermoplastic prepreg comprises the following steps of producing the low-areal-density thermoplastic prepreg by using the production equipment of the low-areal-density thermoplastic prepreg

A material screening step: polishing a plurality of reinforcing materials in the creel to enable the thicknesses of the reinforcing materials to be consistent, fixing one end of each reinforcing material through the movable buckle seat and the fixed buckle seat, and pulling the other end of each reinforcing material through the movable buckle pull seat so as to screen out the reinforcing materials which meet a tensile test and are close in thickness and lead out of the creel;

a yarn spreading step: carrying out yarn spreading treatment on the reinforcing material led out from the creel in the yarn spreading device;

and (3) infiltration: infiltrating the reinforced material subjected to yarn unfolding treatment in the infiltration mold so as to enable two surfaces of the reinforced material to be attached with high-temperature colloidal resin films;

a felt releasing step: rolling the outer side of the resin film on the reinforced material into a composite surfacing mat in the mat placing device;

a forming step: flattening and molding the composite prepreg through the shaping roller;

a winding step: and rolling the formed prepreg through the rolling device.

Compared with the prior art, the invention has the beneficial effects that the reinforcing materials are tensioned and then are in a W shape, and the relatively thick reinforcing materials are ground off through the grinding roller which does not stop rotating in the feeding process of the reinforcing materials, so that the thicknesses of the reinforcing materials tend to be consistent. Then the first turning driving rod and the second turning driving rod enable the hollow turning rods connected end to end in sequence to be turned downwards, and the buckle plates on the plurality of movable buckle seats can be synchronously buckled to fix the reinforcing materials. Meanwhile, the movable buckle pulling seat also fixes the reinforcing material and pulls the reinforcing material along the feeding direction of the reinforcing material. It should be noted that, when the movable buckle pulling seat is pulled, the force applied to the reinforcing material is not detected by the pressure sensors together, but detected by the pressure sensors. Any reinforcing material can be accurately detected, and if one or more reinforcing materials do not reach the stress set value and break, the reinforcing material needs to be pulled from the creel roller again or new materials need to be replaced on the creel roller. Any reinforcing material can be accurately detected, the overall arrangement of the equipment is not damaged, and the production efficiency of the equipment is not greatly reduced. Therefore, before the reinforcing material is led out from the creel, the reinforcing material with the same thickness and strength can be obtained through treatment, and the finally produced prepreg naturally has better plasticity and toughness.

Drawings

FIG. 1 is a schematic flow diagram of a conventional thermoplastic prepreg production apparatus as mentioned in the background art;

FIG. 2 is a schematic flow diagram of a low areal density thermoplastic prepreg production apparatus provided by an embodiment of the invention;

FIG. 3 is a first cross-sectional view of a creel provided by an embodiment of the present invention;

FIG. 4 is an enlarged view of portion A from FIG. 3;

FIG. 5 is a schematic view of a connection structure of a fixed buckle seat and a movable buckle seat according to an embodiment of the present invention;

FIG. 6 is a second cross-sectional view of a creel provided by an embodiment of the present invention;

FIG. 7 is a third cross-sectional view of a creel provided by an embodiment of the present invention;

FIG. 8 is an enlarged view of portion B from FIG. 7;

fig. 9 is a schematic structural diagram of a positioning main roller according to an embodiment of the present invention.

In the figure: 1. a creel; 2. a filament collecting plate; 3. a yarn spreading device; 4. an extruder; 5. infiltrating the mould; 6. a felt laying device; 7. an infrared heating device; 8. a shaping roller; 9. a traction roller; 10. a winding device; 11. a reinforcing material; 12. a tension roller; 13. grinding a roller; 14. a fixed buckle seat; 15. a connecting rod; 16. a movable buckle seat; 17. a pressure sensor; 18. buckling the plate; 19. a first connecting lug; 20. a hollow turnup bar; 21. a connecting projection; 22. a connecting groove; 23. a first tumble drive lever; 24. a second tumble drive lever; 25. connecting the sliding chute; 26. connecting the sliding block; 27. an elastic thread body; 28. a movable buckle pull seat; 29. positioning a main roller; 30. a first lower pressure auxiliary roller; 31. a second pressing auxiliary roller; 32. a first lifting groove; 33. a second engaging lug; 34. a slot; 35. inserting a rod; 36. a first via hole; 37. a second via hole; 38. a pull-up base; 39. a pull-down base; 40. an upper pull rod; 41. a second lifting groove; 42. a first horizontal pull groove; 43. a lower pull rod; 44. a second horizontal pull groove; 45. a positioning ring groove; 46. a tensioning block; 47. and pressing the shaping device.

Detailed Description

The foregoing and additional embodiments and advantages of the present invention are described more fully hereinafter with reference to the accompanying drawings. It is to be understood that the described embodiments are merely some, and not all, embodiments of the invention.

In one embodiment, as shown in fig. 2-5.

The low-surface-density thermoplastic prepreg production equipment provided by the embodiment comprises a creel 1, a filament collecting plate 2, a yarn spreading device 3, an extruder 4, a soaking mould 5, a felt placing device 6, an infrared heating device 7, a shaping roller 8, a traction roller 9 and a winding device 10 which are sequentially arranged along the direction of a production line, wherein a tensioning roller 12 is arranged in the creel 1 along the feeding direction of a plurality of reinforced materials 11, the tensioning roller 12 enables the plurality of reinforced materials 11 to be W-shaped after tensioning, a polishing roller 13 positioned above the tensioning roller 12 is also arranged in the creel 1, the thickness of the plurality of reinforced materials 11 tends to be consistent through the polishing roller 13, a plurality of fixed buckling seats 14 are also arranged in the creel 1 along the feeding direction of the reinforced materials 11, the fixed buckling seats 14 correspond to the reinforced materials 11 one by one, the fixed buckling seats 14 are fixed in the creel 1 through connecting rods 15, a movable buckling seat 16 is connected to any fixed buckling seat 14 in a sliding manner along the feeding direction of the reinforced materials 11, a pressure sensor 17 is arranged between the movable buckle seat 16 and the fixed buckle seat 14, a buckle plate 18 which can be turned upwards is hinged on the movable buckle seat 16, a first connecting lug 19 is arranged on the buckle plate 18, a hollow turning rod 20 is arranged in each first connecting lug 19 in a penetrating way, one end of each hollow turning rod 20 is provided with a linear connecting bulge 21, the other end of each hollow turning rod 20 is provided with a linear connecting groove 22, each hollow turning rod 20 is sequentially connected end to end so that the buckle plates 18 on the plurality of movable buckle seats 16 can be synchronously buckled to fix the reinforcing material 11, a first turning driving rod 23 and a second turning driving rod 24 are respectively arranged at two sides in the creel 1, a linear connecting chute 25 which is matched with the hollow turning rod 20 at one side is arranged at the end part of the first turning driving rod 23, a linear connecting slide block 26 which is matched with the hollow turning rod 20 at the other side is arranged at the end part of the second turning driving rod 24, the hollow turnover rods 20 are connected through elastic line bodies 27, and when the pinch plate 18 is buckled and fixed with the reinforcing material 11, the moving directions of the connecting protrusions 21, the connecting grooves 22, the connecting sliding grooves 25 and the connecting sliding blocks 26 are the same as the feeding direction of the reinforcing material 11; a plurality of movable buckling and pulling seats 28 are further arranged in the creel 1 along the feeding direction of the reinforced materials 11, the movable buckling and pulling seats 28 correspond to the reinforced materials 11 one by one to fix the reinforced materials 11, and the movable buckling and pulling seats 28 can enable the pressure sensors 17 to detect the stress conditions of the reinforced materials 11 corresponding to each other by pulling along the feeding direction of the reinforced materials 11 after buckling of the buckling plates 18.

In the present embodiment, the difference from the conventional thermoplastic prepreg manufacturing apparatus is that, in order to improve the toughness of the prepreg, the thickness of the reinforcing materials 11 is made uniform by the tension roller 12 in cooperation with the grinding roller 13 before the reinforcing materials 11 are manufactured, and thus the reinforcing materials 11 have more excellent plasticity after resin layers are coated on both sides. However, to compromise the toughness of the prepreg, i.e., to ensure that any reinforcing material 11 making up the prepreg has comparable strength, the resulting prepreg is more tough. It is not easy to perform the tensile test for each reinforcing material 11 in the production line, and particularly, the tensile test is performed for the reinforcing material 11 in sections along the feeding direction of the reinforcing material 11 without affecting the overall arrangement of the apparatus.

In the present embodiment, the reinforcing material 11 is tensioned and then formed into a W-shape, and the reinforcing material 11 having a relatively large thickness is ground away by the grinding roller 13 which does not stop during the feeding of the reinforcing material 11, so that the thickness of each reinforcing material 11 tends to be uniform. Then the first turning driving rod 23 and the second turning driving rod 24 turn down the hollow turning rods 20 which are connected end to end in sequence, so that the buckle plates 18 on the plurality of movable buckle seats 16 can be synchronously buckled to fix the reinforcing materials 11. At the same time, the movable button-pulling seat 28 also fixes the reinforcing material 11 and pulls in the feeding direction of the reinforcing material 11. It should be noted that, when the movable buckle pulling seat 28 is pulled, the force applied to the reinforcing material 11 is not detected by the pressure sensors 17 together, but detected by the pressure sensors 17. Any reinforcing material 11 can be accurately detected, and if one or more sections of the reinforcing material 11 are broken due to the fact that the stress set value is not reached, the section of the reinforcing material 11 needs to be pulled from the creel roller again, or new materials need to be replaced on the creel roller. Any reinforcing material 11 can be accurately detected, the overall arrangement of the equipment is not damaged, and the production efficiency of the equipment is not greatly reduced. This is achieved because the moving directions of the connecting protrusion 21, the connecting groove 22, the connecting sliding groove 25, and the connecting slider 26 are the same as the feeding direction of the reinforcing material 11 when the buckle 18 engages and fixes the reinforcing material 11. The pulling of each movable buckle pulling seat 28 causes the corresponding movable buckle seat 16 and buckle plate 18 to displace relative to the fixed buckle seat 14, so that the stress of the reinforcing material 11 can be reflected on the corresponding pressure sensor 17. Of course, if there is a break, it can be judged by a rapid change in the output value of the pressure sensor 17.

In the embodiment, the reinforcing material 11 with the same thickness and strength can be obtained by processing the creel 1 before leading out the reinforcing material 11, so that the finally produced prepreg has better plasticity and toughness naturally.

In one embodiment, as shown in FIG. 6.

The low-surface-density thermoplastic prepreg production apparatus provided by the present embodiment has the tension roller 12 including the positioning main roller 29, the first auxiliary pressing roller 30, and the second auxiliary pressing roller 31, and the first auxiliary pressing roller 30 and the second auxiliary pressing roller 31 are respectively located on both sides of the positioning main roller 29 and are located at positions lower than the positioning main roller 29.

In this embodiment, the reinforcing material 11 can be tensioned to have a W-shape by positioning the main roller 29, the first auxiliary pressing roller 30, and the second auxiliary pressing roller 31, and the height of the middle section of the W-shape is higher, so that the polishing action of the polishing roller 13 can be facilitated.

In one embodiment, as shown in FIG. 6.

According to the low-surface-density thermoplastic prepreg production equipment provided by the embodiment, the first lifting grooves 32 are formed in two sides in the creel 1, and the polishing roller 13 can move along the first lifting grooves 32 to polish the reinforcing materials 11 with different thicknesses.

In this embodiment, depending on the actual requirements of the grinding, some need to be ground more and some need to be ground slightly, which can be achieved by controlling the height of the grinding roller 13.

In one embodiment, as shown in FIG. 6.

According to the low-surface-density thermoplastic prepreg production equipment provided by the embodiment, the second connecting lug 33 is arranged at the bottom of the fixing buckle seat 14, and the second connecting lugs 33 are connected and fixed in series through the connecting rods 15.

In the present embodiment, the connecting rods 15 connect the second connecting lugs 33 in series, so that all the fixing anchors 14 are integrally fixed together.

In one embodiment, as shown in FIG. 5.

In the low-areal density thermoplastic prepreg production equipment provided by the embodiment, the sections of the fixed buckling seat 14 and the movable buckling seat 16 are both in a U shape, the two sides of the fixed buckling seat 14 are provided with the inserting grooves 34, the direction of the inserting grooves 34 is along the feeding direction of the reinforcing material 11, the two sides of the movable buckling seat 16 are provided with the inserting rods 35, and the inserting rods 35 are matched with the inserting grooves 34.

In the present embodiment, a connection structure of the fixed holder 14 and the movable holder 16 is provided, which is movably connected by the insertion groove 34 and the insertion rod 35. However, when the relative displacement occurs, the pressure sensor 17 between the two can be caused to output data.

In one embodiment, as shown in fig. 5 and 7.

In the low-areal density thermoplastic prepreg production device provided by the embodiment, the hollow turning rod 20 connected with the first turning driving rod 23 is provided with a first via hole 36 connected with the hollow portion thereof, the hollow turning rod 20 connected with the second turning driving rod 24 is provided with a second via hole 37 connected with the hollow portion thereof, after the elastic thread bodies 27 are connected in series with the hollow turning rods 20, one end of each hollow turning rod is connected with the first turning driving rod 23 after passing through the first via hole 36, and the other end of each hollow turning rod is connected with the second turning driving rod 24 after passing through the second via hole 37.

In the present embodiment, the hollow turnup levers 20 are connected in series by the elastic thread-like body 27, and when the pulling force is removed, the hollow turnup levers 20 can be restored to the position state of being coaxial with each other while being maintained to be coaxial with the first and second

turnup driving levers

23 and 24.

In one embodiment, as shown in fig. 7 and 8.

In the low-surface-density thermoplastic prepreg production equipment provided by the embodiment, the movable buckling and pulling seat 28 comprises an upper pulling seat 38 and a lower pulling seat 39, the upper pulling seats 38 are connected in series through an upper pulling rod 40, a second lifting groove 41 and a first transverse pulling groove 42 are arranged on two sides in the creel 1, the second lifting groove 41 is connected with the first transverse pulling groove 42, the lower pulling seats 39 are connected in series through a lower pulling rod 43, a second transverse pulling groove 44 is arranged on two sides in the creel 1, and the second transverse pulling groove 44 is parallel to the first transverse pulling groove 42; wherein the upper draw bar 40 descends along the second elevation groove 41 to press the upper and lower draw bases 38 and 39, and then the upper draw bar 40 and the lower draw base 39 draw the reinforcing material 11 along the first and

second traverse grooves

42 and 44, respectively, in the feeding direction thereof.

In this embodiment, the movable buckle pulling seat 28 includes an upper pulling seat 38 and a lower pulling seat 39, all the lower pulling seats 39 are fixed in series by a lower pulling rod 43, and all the upper pulling seats 38 are controlled to be lifted synchronously by an upper pulling rod 40 in series. The specific action is that the upper pull rod 40 descends along the second lifting groove 41 to press the upper pull seat 38 and the lower pull seat 39, and then the two ends of the upper pull rod 40 are aligned with the first horizontal pull groove 42, so that the upper pull rod can be transversely pulled along the first horizontal pull groove 42 and the second horizontal pull groove 44. In a preferred embodiment, the upper pull rod 40 and the lower pull rod 43 are connected through a compression spring, so that the upper pull rod 40 can be automatically reset.

In one embodiment, as shown in fig. 3, 9.

In the low-surface-density thermoplastic prepreg production equipment provided by the embodiment, a plurality of positioning ring grooves 45 are formed on a positioning main roller 29, the positioning ring grooves 45 correspond to the reinforcing materials 11 one by one, the positioning ring grooves 45 are formed by enclosing a plurality of tensioning blocks 46 which are uniformly distributed in the circumferential direction, the depth of the positioning ring grooves 45 can be changed by the inward and outward contraction and extension of the tensioning blocks 46, a lower pressing and shaping device 47 is further arranged in the creel 1 along the feeding direction of the reinforcing materials 11, and the reinforcing materials 11 pass through the lower pressing and shaping device 47; when the pressure sensor 17 detects that the corresponding reinforcing material 11 does not reach the set force value and breaks, the plurality of tensioning blocks 46 corresponding to the reinforcing material 11 are retracted to increase the depth of the positioning ring groove 45, and the lower compression molding device 47 compresses the reinforcing material 11 to make the thicknesses of the plurality of reinforcing materials 11 consistent each time the movable buckle pulling seat 28 pulls the reinforcing material 11.

In this embodiment, unlike the thickness of the entire sanding process in which the sanding roller 13 is raised and lowered, the depth of the positioning ring groove 45 can be changed by extending and retracting the tension block 46, and the sanding thickness of the reinforcement material 11 can be changed relative to the other reinforcement materials 11. Therefore, if the reinforced material 11 has insufficient strength after being integrally polished, namely the corresponding pressure sensor 17 detects that the reinforced material 11 does not reach the stress set value and is broken for a plurality of times, the polishing of the reinforced material 11 is reduced compared with the polishing of other reinforced materials 11 by controlling and changing the depth of the positioning ring groove 45. The reinforcing material 11 is then pressed by the subsequent downward pressing molding device 47 so that the reinforcing material 11 having a lower strength does not wear out and tends to be uniform in thickness with the other reinforcing materials 11. This allows the reinforcement material 11 to be processed to a comparable thickness and strength with reduced loss of strength, and the resulting prepreg will naturally have better moldability and toughness.

In one embodiment, a low areal density thermoplastic prepreg production process, produced using a low areal density thermoplastic prepreg production apparatus as described above, includes the screen material step: polishing a plurality of reinforcing materials 11 in a creel 1 to enable the thicknesses of the reinforcing materials to be consistent, fixing one end of each reinforcing material 11 through a movable buckle base 16 and a fixed buckle base 14, and pulling the other end of each reinforcing material 11 through a movable buckle pulling base 28 to screen out the reinforcing materials 11 which meet a tensile test and are close in thickness, and leading out the reinforcing materials from the creel 1; yarn unfolding step: carrying out yarn spreading treatment on the reinforcing material 11 led out from the creel 1 in the yarn spreading device 3; and (3) infiltration: infiltrating the reinforcing material 11 after the yarn spreading treatment in an infiltration mold 5 to attach high-temperature colloidal resin films to two sides of the reinforcing material 11; a felt releasing step: rolling the outer side of the resin film on the reinforcing material 11 into a composite surfacing mat in a mat placing device 6; a forming step: flattening and molding the composite prepreg through a shaping roller 8; a winding step: the formed prepreg is wound up by a winding-up device 10.

In the present embodiment, the difference from the conventional thermoplastic prepreg manufacturing apparatus is that, in order to improve the toughness of the prepreg, the thickness of the reinforcing materials 11 is made uniform by the tension roller 12 in cooperation with the grinding roller 13 before the reinforcing materials 11 are manufactured, and thus the reinforcing materials 11 have more excellent plasticity after resin layers are coated on both sides. However, to compromise the toughness of the prepreg, i.e., to ensure that any reinforcing material 11 making up the prepreg has comparable strength, the resulting prepreg is more tough.

The above-described embodiments further explain the object, technical means, and advantageous effects of the present invention in detail. It should be understood that the above description is only exemplary of the present invention, and is not intended to limit the scope of the present invention. It should be understood that any modifications, equivalents, improvements, etc. which may occur to those skilled in the art and which fall within the spirit and principles of the invention are intended to be included within the scope of the invention.

Claims

1. The utility model provides a low areal density thermoplasticity preimpregnation material production facility, includes creel (1), collection silk board (2), exhibition yarn device (3), extruder (4), infiltration mould (5), felt put device (6), infrared heating device (7), design roller (8), carry over pinch rolls (9) and coiling mechanism (10) that set gradually along the assembly line direction, its characterized in that, be equipped with tensioning roller (12) along the direction of feed of a plurality of reinforcing material (11) in creel (1), tensioning roller (12) make and be W shape after a plurality of reinforcing material (11) tensioning, still be equipped with in creel (1) and be located polish roller (13) of tensioning roller (12) top, polish roller (13) and make the thickness of a plurality of reinforcing material (11) tend to unanimously, still be equipped with a plurality of fixed knot seats (14) along the direction of feed of reinforcing material (11) in creel (1), fixed knot seat (14) with reinforcing material (11) one-to-one correspond, fixed knot seat (14) are fixed through connecting rod (15) are fixed detain in creel (1), the activity detain seat (16) be equipped with the fixed knot and detain the pressure sensor (16) along the activity knot seat (16) between the fixed knot seat (16) of the activity, a buckle plate (18) which can be turned upwards is hinged on the movable buckle seat (16), the buckle plate (18) is provided with first connecting lugs (19), a hollow turning rod (20) is arranged in each first connecting lug (19) in a penetrating way, one end of each hollow turning rod (20) is provided with a straight-line-shaped connecting bulge (21), the other end of each hollow turning rod (20) is provided with a straight-line-shaped connecting groove (22), each hollow turning rod (20) is sequentially connected end to end so that the buckle plates (18) on the plurality of movable buckle seats (16) can be synchronously buckled to fix the reinforcing material (11), a first overturning driving rod (23) and a second overturning driving rod (24) are respectively arranged at two sides in the creel (1), the end part of the first turning driving rod (23) is provided with a straight connecting sliding groove (25) matched with the hollow turning rod (20) at one side, the end part of the second turning driving rod (24) is provided with a linear connecting slide block (26) matched with the hollow turning rod (20) at the other side, the hollow turning rods (20) are connected by elastic thread bodies (27), and when the buckle plate (18) is used for buckling and fixing the reinforcing material (11), the moving directions of the connecting protrusion (21), the connecting groove (22), the connecting sliding groove (25) and the connecting sliding block (26) are the same as the feeding direction of the reinforcing material (11);

along in creel (1) the direction of feed of reinforcing material (11) still is equipped with a plurality of activities and detains and draws seat (28), the activity is detained and is drawn seat (28) with reinforcing material (11) one-to-one is in order to fix reinforcing material (11), the activity is detained and is drawn seat (28) and is in buckle (18) lock back is along the direction of feed of reinforcing material (11) is drawn and to be enabled a plurality of pressure sensor (17) detect each correspondence the atress condition of reinforcing material (11).

2. The low areal density thermoplastic prepreg production apparatus of claim 1 wherein the tensioning roller (12) comprises a positioning main roller (29), a first depressing auxiliary roller (30), and a second depressing auxiliary roller (31), the first and second depressing auxiliary rollers (30, 31) being located on either side of the positioning main roller (29) and both being located lower than the positioning main roller (29).

3. A low areal density thermoplastic prepreg production apparatus as claimed in claim 1, wherein the creel (1) is provided with first lifting grooves (32) on both sides thereof, the grinding roller (13) being movable along the first lifting grooves (32) to grind out different thicknesses of the reinforcement material (11).

4. The production equipment of the low-areal density thermoplastic prepreg of claim 1, wherein the fixing buckle seat (14) is provided with second connecting lugs (33) at the bottom, and the second connecting lugs (33) are fixed in series through the connecting rods (15).

5. The production equipment of the low-areal-density thermoplastic prepreg according to claim 1, characterized in that the cross sections of the fixed fastener seats (14) and the movable fastener seats (16) are both U-shaped, slots (34) are arranged on both sides of the fixed fastener seats (14), the direction of the slots (34) is along the feeding direction of the reinforcing material (11), and insertion rods (35) are arranged on both sides of the movable fastener seats (16), and the insertion rods (35) are matched with the slots (34).

6. The production equipment of the low-areal density thermoplastic prepreg according to claim 1, characterized in that the hollow turnup rod (20) connected with the first turnup driving rod (23) is provided with a first via hole (36) connected with a hollow part thereof, the hollow turnup rod (20) connected with the second turnup driving rod (24) is provided with a second via hole (37) connected with a hollow part thereof, an elastic thread body (27) is connected in series with each hollow turnup rod (20), and then one end of the elastic thread body passes through the first via hole (36) and is connected with the first turnup driving rod (23), and the other end of the elastic thread body passes through the second via hole (37) and is connected with the second turnup driving rod (24).

7. The production equipment of the low-areal density thermoplastic prepreg according to claim 1, wherein the movable buckling and pulling seats (28) comprise an upper pulling seat (38) and a lower pulling seat (39), a plurality of the upper pulling seats (38) are connected in series through an upper pulling rod (40), a second lifting groove (41) and a first transverse pulling groove (42) are arranged on two sides in the creel (1), the second lifting groove (41) is connected with the first transverse pulling groove (42), a plurality of the lower pulling seats (39) are connected in series through a lower pulling rod (43), a second transverse pulling groove (44) is arranged on two sides in the creel (1), and the second transverse pulling groove (44) is parallel to the first transverse pulling groove (42);

the upper pull rod (40) descends along the second lifting groove (41) to enable the upper pull seat (38) and the lower pull seat (39) to be pressed tightly, and then the upper pull rod (40) and the lower pull seat (39) respectively pull the reinforcing materials (11) along the first transverse pull groove (42) and the second transverse pull groove (44) in the feeding direction of the reinforcing materials.

8. The low areal density thermoplastic prepreg production device of claim 7 wherein the upper tie bar (40) and the lower tie bar (43) are connected by a compression spring.

9. The low-areal density thermoplastic prepreg production equipment according to claim 2, wherein a plurality of positioning ring grooves (45) are formed on the positioning main roller (29), the positioning ring grooves (45) correspond to the reinforcing materials (11) one by one, the positioning ring grooves (45) are formed by enclosing a plurality of tensioning blocks (46) which are uniformly distributed in the circumferential direction, the depth of the positioning ring grooves (45) can be changed by the inward and outward contraction and extension of the tensioning blocks (46), a lower compression molding device (47) is further arranged in the creel (1) along the feeding direction of the reinforcing materials (11), and the reinforcing materials (11) pass through the lower compression molding device (47);

when the pressure sensor (17) detects for a plurality of times that the corresponding reinforcing material (11) does not reach the set stress value and breaks, a plurality of tensioning blocks (46) corresponding to the reinforcing material (11) are retracted to increase the depth of the positioning ring groove (45), and the downward pressing and shaping device (47) presses the reinforcing material (11) to enable the thicknesses of a plurality of reinforcing materials (11) to be consistent each time the movable buckle pulling seat (28) pulls the reinforcing material (11).

10. A production process of a low-areal-density thermoplastic prepreg, characterized by using the production equipment of the low-areal-density thermoplastic prepreg of any one of claims 1 to 9 for production, comprising

A material screening step: polishing a plurality of reinforcing materials (11) in the creel (1) to enable the thicknesses of the reinforcing materials to be consistent, fixing one end of each reinforcing material (11) through the movable buckle seat (16) and the fixed buckle seat (14), and pulling the other end of each reinforcing material (11) through the movable buckle pulling seat (28) so as to screen out the reinforcing materials (11) which are in accordance with a tensile test and have close thicknesses to be led out of the creel (1);

yarn unfolding step: carrying out yarn spreading treatment on the reinforcing material (11) led out of the creel (1) in the yarn spreading device (3);

and (3) infiltration: infiltrating the reinforcing material (11) after the yarn spreading treatment in the infiltration mold (5) so as to attach high-temperature colloidal resin films to two surfaces of the reinforcing material (11);

a felt releasing step: rolling the composite surfacing mat outside the resin film on the reinforcing material (11) in the mat placing device (6);

a forming step: flattening and molding the composite prepreg through the shaping roller (8);

a winding step: the formed prepreg is wound by the winding device (10).