CN212385790U

CN212385790U - Continuous fiber reinforced thermoplastic composite material prepreg melting impregnation die

Info

Publication number: CN212385790U
Application number: CN202020705555.7U
Authority: CN
Inventors: 刘明昌; 胡潇; 胡仲杰; 岑婵芳
Original assignee: SHANGHAI LEADGO-TECH CO LTD
Current assignee: SHANGHAI LEADGO-TECH CO LTD
Priority date: 2020-04-30
Filing date: 2020-04-30
Publication date: 2021-01-22
Anticipated expiration: 2030-04-30

Abstract

The utility model discloses a continuous fibers reinforcing thermoplasticity combined material preimpregnation material melting impregnation mould, the drive arrangement who opens and shuts on mould and lower mould and drive, form the flooding passageway between mould and the lower mould, it goes up heating device and lower heating device to be provided with respectively on mould and the lower mould, upward be provided with mould runner and lower mould runner in mould and the lower mould respectively, it is connected with the feed inlet respectively to go up mould runner and lower mould runner, it is provided with a plurality of impregnating rollers on along continuous fibers trend interval in the flooding passageway to go up the mould, the lower mould is provided with a plurality of impregnating rollers down along continuous fibers trend interval in the flooding passageway, goes up a plurality of impregnating rollers and a plurality of impregnating rollers down and walks to the crisscross setting in interval along continuous fibers for the flooding passageway forms and is W type's flooding passageway.

Description

Continuous fiber reinforced thermoplastic composite material prepreg melting impregnation die

Technical Field

The utility model relates to a polymer composite technical field relates to a continuous fibers reinforcing thermoplasticity combined material preimpregnation material melting impregnation mould.

Background

Continuous fiber reinforced thermoplastic Composites (CFRT) are high strength, high stiffness, and high toughness composites made by a process of melt impregnating fibers with a thermoplastic resin, using continuous fibers as a reinforcement and a thermoplastic resin as a matrix. The product has the characteristics of light weight, high rigidity, high toughness and the like, and is widely applied to various fields of automobile industry, aerospace, military industry, electronics and the like.

At present, the preparation equipment of domestic continuous fiber reinforced thermoplastic composite material prepreg tapes basically adopts a mode of melting and impregnating fibers by thermoplastic resin, for example, patents CN200810201216.9 and CN200910030336.1, and the adopted impregnation modes are double-sided gluing and impregnation.

In addition, in patent CN201110296640.8, an arc-shaped resin channel is adopted for impregnation, the impregnation is divided into a primary impregnation tank and a secondary impregnation tank, the secondary impregnation tank is internally provided with an arc-shaped channel filled with molten resin, the gap of the arc-shaped channel is 3mm, the primary impregnation tank is outside the arc-shaped channel, and the fiber enters the arc-shaped channel after primary impregnation and needs to be heated and impregnated again, so that the energy consumption and the working procedure are increased; patent CN201410084598.7 has adopted "V" font resin passageway to accomplish the fibre flooding, has a plurality of trough, crest structure to constitute the flooding passageway, selects hot melt resin passageway and the continuous fiber transfer passage in pay-off district the place ahead mutually perpendicular, and molten resin gets into the flooding passageway from one side, is unfavorable for the impregnation of fibre two-sided. In addition, the impregnation dies of these two patents, once determined, do not allow to change the gaps in the "arc channels" and the wrap angles of the fibers on the "peaks" and "valleys" and are not well suited for the production of various fibers. This is because the fiber types are different, the yarn thickness (number or weight of yarn with a certain length) is different, and the diameter, wrap angle and channel gap of the impregnation roll are different; the number, diameter, and wrap angle of the corresponding impregnation rolls vary from thermoplastic resin to thermoplastic resin due to differences in processing viscosity and flowability. The method is to adopt a melting impregnation mould to prepare a plurality of resin and fiber prepregs to obtain the best effect, and is difficult to add.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to provide a continuous fibers reinforcing thermoplasticity combined material preimpregnation material melting impregnation mould to the aforesaid of prior art not enough and defect to solve above-mentioned problem.

The utility model provides a technical problem can adopt following technical scheme to realize:

the utility model provides a continuous fibers reinforcing thermoplasticity combined material preimpregnation material melting impregnation mould, includes mould and lower mould and the drive arrangement that the mould opened and shut in the drive, form the flooding passageway between last mould and the lower mould, go up and be provided with heating device and lower heating device on mould and the lower mould respectively, it is provided with mould runner and lower mould runner in mould and the lower mould respectively to go up the mould runner and be connected with the feed inlet respectively with the lower mould runner, it is provided with a plurality of impregnating rollers on following continuous fibers and moving towards the interval in the flooding passageway to go up the mould and be located the flooding passageway, the lower mould is located the flooding passageway and is provided with a plurality of impregnating rollers down along continuous fibers and moves towards the interval, goes up impregnating rollers and a plurality of impregnating rollers down and moves towards the.

In a preferred embodiment of the present invention, a plurality of upper dip rolls and a plurality of lower dip rolls are respectively installed on the upper die and the lower die through detachable connectors.

In a preferred embodiment of the present invention, the protruding lengths of the upper and lower dip rolls are distributed from low to high along the continuous fiber direction, the top circular arc diameters of the upper and lower dip rolls are distributed from small to large along the continuous fiber direction, and the distance between the upper and lower dip rolls is from wide to narrow along the continuous fiber direction.

In a preferred embodiment of the present invention, the upper mold runner and the lower mold runner are vertically distributed with the continuous fiber.

In a preferred embodiment of the present invention, the discharge ports of the upper mold runner and the lower mold runner are in a necking and extruding structure.

In a preferred embodiment of the present invention, the upper mold and the lower mold are respectively provided with an upper mold side frame and a lower mold side frame, the upper mold side frame and the lower mold side frame are respectively provided with an upper mold side frame internal longitudinal flow channel and a lower mold side frame internal longitudinal flow channel, the upper mold side frame internal longitudinal flow channel and the lower mold side frame internal longitudinal flow channel are respectively provided with a melt flow regulating component, one end of the upper mold side frame internal longitudinal flow channel and the lower mold side frame internal longitudinal flow channel is respectively butted with the feed inlet of the upper mold flow channel and the lower mold flow channel, and the other end of the upper mold side frame internal longitudinal flow channel and the lower mold side frame internal longitudinal flow channel is respectively connected with the.

In a preferred embodiment of the present invention, the feed port is disposed on the material distributing part, and an upper material distributing port and a lower material distributing port are disposed in the material distributing part and are butted against the other ends of the upper mold side frame inner longitudinal flow passage and the lower mold side frame inner longitudinal flow passage.

In a preferred embodiment of the present invention, a melt stopper for preventing the melt from flowing backwards is provided at the fiber yarn inlet of the impregnation channel.

In a preferred embodiment of the present invention, the upper die lip of the upper die is provided with a lip gap adjusting device.

Due to the adoption of the technical scheme, the utility model has the advantages of as follows:

1. an impregnation roller is arranged in the die, when the continuous fibers pass through the die, the path is in a W shape, and the continuous fibers and the resin melt are impregnated in the impregnation die, so that the temperature of the resin melt is guaranteed, and the fibers and the resin melt are tensioned and rubbed by the impregnation roller, so that the resin melt can be uniformly impregnated on the fibers; in addition, the impregnation roller can be detached and replaced according to different fibers and resins, so that the mold has multiple purposes, and the mold opening cost is reduced;

2. the dipping mould is provided with two resin melt runners, and the structure is simple and detachable; after the resin is extruded by the die head of the extruder, the resin is divided into two parts in the dipping die, the melt flow can be independently regulated by the flow passage regulating part through the two flow passages, and all the flow passages are in the die, so that the heat is preserved, other external structures are not added, and the die cost is saved;

3. the dipping die is a composite type, the upper die can be opened and closed through the driving device, and the operation is simple.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without creative efforts.

Fig. 1 is a schematic structural diagram of an embodiment of the present invention.

Fig. 2 is a schematic diagram of an internal structure according to an embodiment of the present invention.

Fig. 3 is a schematic view of a lower mold according to an embodiment of the present invention.

Fig. 4 is an external schematic view of a resin melt feed path according to an embodiment of the present invention.

Fig. 5 is a schematic view of the inside of a resin melt feeding path according to an embodiment of the present invention.

Fig. 6 is a schematic view of an upper mold side frame according to an embodiment of the present invention.

Detailed Description

In order to make the technical means, creation features, achievement purposes and functions of the present invention easy to understand, the present invention is further explained below.

Referring to fig. 1 to 6, the continuous fiber reinforced thermoplastic composite prepreg melt impregnation die comprises an upper die 1, a lower die 2 and a driving device 5 for driving the upper die 1 to open and close, wherein the driving device 5 in the embodiment comprises a connecting rod 5a connected with the upper die 1 and a piston 5b for driving the connecting rod 5a to swing. The upper die 1 and the lower die 2 form a dipping passage 27 therebetween. The upper die 1 and the lower die 2 are respectively provided with an upper heating device and a lower heating device, which in this embodiment are respectively heating rods 7a, 7b provided on the upper die 1 and the lower die 2.

An upper die runner 17 and a lower die runner 16 are respectively arranged in the upper die 1 and the lower die 2, and the upper die runner 17 and the lower die runner 16 are respectively connected with the feeding hole. In order to make the melt flow uniformly, the upper mold runner 17 and the lower mold runner 16 in this embodiment are distributed perpendicular to the continuous fiber direction, and the discharge ports of the upper mold runner 17 and the lower mold runner 16 are in necking extrusion structures 23 and 24. In this embodiment, the upper mold runner insert 21 and the lower mold runner insert 22 are embedded in the corresponding positions of the upper mold runner 17 and the lower mold runner 16 to form the upper mold runner 17, the lower mold runner 16 and the necking extrusion structures 23 and 24, so that the upper mold runner insert 21 and the lower mold runner insert 22 can be replaced conveniently to replace different fibers and resins.

The upper die 1 is positioned in the impregnation channel 27 and is provided with a plurality of upper impregnation rollers 19a at intervals along the direction of the continuous fibers, the lower die 2 is positioned in the impregnation channel 27 and is provided with a plurality of lower impregnation rollers 19b at intervals along the direction of the continuous fibers, and the upper impregnation rollers 19a and the lower impregnation rollers 19b are arranged at intervals in a staggered manner along the direction of the continuous fibers, so that the impregnation channel 27 forms a W-shaped impregnation channel. When the continuous fibers pass through the interior of the impregnation die, the path is in a W shape, and the continuous fibers and the resin melt are impregnated in the impregnation die, so that the temperature of the resin melt is guaranteed, and the fibers and the resin melt are tensioned and rubbed by the impregnation roller, so that the resin melt can be uniformly impregnated on the fibers. In this embodiment, the upper and

lower dip rolls

19a and 19b are respectively mounted on the upper and

lower dies

1 and 2 through detachable connectors 20, the detachable connectors 20 are countersunk screws, and the upper and

lower dip rolls

19a and 19b can be detached and replaced according to different fibers and resins, so that one die is multipurpose, and the die opening cost is reduced. In order to further enable the resin melt to be evenly impregnated on the fibers, the protruding lengths of the upper impregnation rollers 19a and the lower impregnation rollers 19b are distributed from low to high along the running direction of the continuous fibers, the diameters of top arc surfaces of the upper impregnation rollers 19a and the lower impregnation rollers 19b are distributed from small to large along the running direction of the continuous fibers, the spacing distance between the upper impregnation rollers 19a and the lower impregnation rollers 19b is from wide to narrow along the running direction of the continuous fibers, and the change sizes of the upper impregnation rollers 19a and the lower impregnation rollers 19b are determined according to the size of the whole mold.

The upper die 1 and the lower die 2 are respectively provided with an upper die side frame 61 and a lower die side frame 62, the upper die side frame 61 and the lower die side frame 62 are respectively provided with an upper die side frame internal longitudinal runner 15 and a lower die side frame internal longitudinal runner 16, the upper die side frame internal longitudinal runner 15 and the lower die side frame internal longitudinal runner 16 are respectively provided with a melt flow regulating component 8, the melt flow regulating component 8 is an adjusting bolt, and the melt flow can be independently adjusted by the adjusting bolt. One end of the upper die side frame internal longitudinal flow passage 15 and one end of the lower die side frame internal longitudinal flow passage 16 are respectively in butt joint with the feed inlets of the upper die flow passage 17 and the lower die flow passage 16, and the other end of the upper die side frame internal longitudinal flow passage 15 and the other end of the lower die side frame internal longitudinal flow passage 16 are respectively connected with the feed inlets. The feed inlet 10 in this embodiment is provided on the material distributing part 3, and the material distributing part 3 is provided therein with an upper material distributing port 11 and a lower material distributing port 12 which are butted with the other ends of the upper die side frame inner longitudinal flow passage 15 and the lower die side frame inner longitudinal flow passage 16. The material distributing part 3 can be a fixed upright post. The utility model discloses all runners are all in the mould, not only keep warm but also do not increase other exterior structure, and simple process saves the mould cost.

In order to prevent the reverse flow of the melt, a melt stopper 26 for preventing the reverse flow of the melt is provided at the fiber feed port 25 of the impregnation channel 27.

The upper die lip 4 of the upper die 1 is provided with a lip gap adjusting device 13, the lip gap adjusting device 13 is the same as the lip adjusting bolt in the prior art, the lip gap of the push-pull type adjusting die body is achieved, and the applicability and the thickness uniformity of the product of the die body are further improved.

In the embodiment, the tail overturning part of the upper die side frame 61 is provided with a rotating abdicating edge, the angle alpha 18 of the rotating abdicating edge is 150-165 degrees, so that when the driving device 5 drives the upper die 1 to rotate, the upper die 1 can be opened at a proper angle, if the angle alpha is too large, the opening angle of the upper die 1 is too small, and the continuous fiber threading and the hot melt resin cleaning in the die cavity are influenced; if angle alpha undersize, go up mould 1 opening angle and can be too big, the too big mould heat dissipation that leads to easily of opening is too fast, unfavorable heat preservation to the output of the drive arrangement 5 that mould 1 opened and shut in the drive will lengthen, influence the overall structure of mould, also pleasing to the eye.

An impregnation process for melting and impregnating a mold by using a continuous fiber reinforced thermoplastic composite prepreg comprises the following steps:

the method comprises the following steps:

closing the dipping die in advance according to the processing temperature of the resin, heating to a specified temperature, keeping for 1-2 hours, and then adjusting a proper die lip gap through a lip gap adjusting device 13, wherein the gap is generally 0.2-0.5 mm;

step two:

operating the driving device 5, opening the upper die 1, inserting the continuous fibers subjected to yarn arrangement and yarn unfolding through a fiber yarn inlet 25 of the die, penetrating out of a die lip of the die, guiding the continuous fibers to the position of a tractor, starting the tractor, and continuously drawing the continuous fibers out until the yarn layers are orderly arranged and uniformly unfolded;

step three:

pouring a resin raw material into a charging barrel of an extruder, starting the extruder, extruding a resin melt into a mold through a discharge port (namely a feed port 10) of the extruder, conveying molten resin into an upper mold side frame internal longitudinal runner 15 and a lower mold side frame internal longitudinal runner 14, conveying a molten resin corner into the upper mold runner and the lower mold runner through an upper mold side frame internal transverse runner 17 and a lower mold side frame internal transverse runner 16, flowing out of a hanger type runner, and spraying the resin melt onto continuous fibers in a film spraying manner;

step four:

the continuous fiber sprayed with the resin melt is tensioned and rubbed by the upper impregnation rollers 19a and the lower impregnation rollers 19b, the resin melt is uniformly impregnated on the fiber, the redundant resin melt is remained in the cavity of the mold, and the melt stop 26 prevents the resin from flowing out of the mold;

step five:

and (3) shaping and cooling the continuous fibers soaked with the resin under the action of traction to obtain the continuous fiber reinforced thermoplastic composite prepreg.

The basic principles and the main features of the invention and the advantages of the invention have been shown and described above. It will be understood by those skilled in the art that the present invention is not limited to the above embodiments, and that the foregoing embodiments and descriptions are provided only to illustrate the principles of the present invention without departing from the spirit and scope of the present invention. The scope of the invention is defined by the appended claims and equivalents thereof.

Claims

1. The utility model provides a continuous fibers reinforcing thermoplasticity combined material preimpregnation material melting impregnation mould, includes mould and lower mould and the drive arrangement that the mould opened and shut in the drive, form the flooding passageway between last mould and the lower mould, go up and be provided with heating device and lower heating device on mould and the lower mould respectively, it is provided with mould runner and lower mould runner in mould and the lower mould respectively to go up the mould runner and be connected with the feed inlet respectively with the lower mould runner, a serial communication port, it is provided with a plurality of impregnating rollers on following continuous fibers and moving towards the interval in the flooding passageway to go up the mould, the lower mould is provided with a plurality of impregnating rollers down along continuous fibers and moving towards the interval in the flooding passageway, goes up impregnating rollers and a plurality of impregnating rollers down and moves towards the crisscross setting of interval along continuous.

2. The continuous fiber reinforced thermoplastic composite prepreg melt impregnation die of claim 1, wherein the plurality of upper impregnation rollers and the plurality of lower impregnation rollers are mounted on the upper die and the lower die, respectively, by detachable connections.

3. The continuous fiber reinforced thermoplastic composite prepreg melt-impregnation die of claim 1 or 2, wherein the protrusion lengths of the plurality of upper impregnation rollers and the plurality of lower impregnation rollers are distributed from low to high along the continuous fiber direction, the diameters of the top arc surfaces of the plurality of upper impregnation rollers and the plurality of lower impregnation rollers are distributed from small to large along the continuous fiber direction, and the spacing distance between the plurality of upper impregnation rollers and the plurality of lower impregnation rollers is from wide to narrow along the continuous fiber direction.

4. The continuous fiber reinforced thermoplastic composite prepreg melt impregnation die of claim 1, wherein the upper die runner and the lower die runner are distributed perpendicular to the continuous fiber orientation.

5. The continuous fiber reinforced thermoplastic composite prepreg melt-impregnation die of claim 4, wherein the discharge ports of the upper die runner and the lower die runner are in a necking extrusion structure.

6. The continuous fiber reinforced thermoplastic composite prepreg melting and impregnating mold according to claim 1, 4 or 5, wherein the upper mold and the lower mold are respectively provided with an upper mold side frame and a lower mold side frame, the upper mold side frame and the lower mold side frame are respectively internally provided with an upper mold side frame internal longitudinal flow passage and a lower mold side frame internal longitudinal flow passage, the upper mold side frame internal longitudinal flow passage and the lower mold side frame internal longitudinal flow passage are respectively provided with a melt flow regulating component, one end of the upper mold side frame internal longitudinal flow passage and one end of the lower mold side frame internal longitudinal flow passage are respectively butted with the feed inlets of the upper mold flow passage and the lower mold flow passage, and the other end of the upper mold side frame internal longitudinal flow passage and the other end of the lower mold side frame internal longitudinal flow passage are respectively connected.

7. The continuous fiber reinforced thermoplastic composite prepreg melt-impregnation die of claim 6, wherein the feed inlet is arranged on a material distribution part, and an upper material distribution port and a lower material distribution port which are butted with the other ends of the longitudinal flow passage inside the upper die side frame and the longitudinal flow passage inside the lower die side frame are arranged in the material distribution part.

8. The continuous fiber reinforced thermoplastic composite prepreg melt-impregnation die of claim 1, wherein a melt stopper for preventing melt backflow is provided on a fiber yarn inlet of the impregnation channel.

9. The continuous fiber reinforced thermoplastic composite prepreg melt-impregnation die of claim 1, wherein an upper die lip of the upper die is provided with a lip gap adjustment device.