CN213766678U - Continuous fiber reinforced thermoplastic composite material unidirectional prepreg tape dipping die - Google Patents
Continuous fiber reinforced thermoplastic composite material unidirectional prepreg tape dipping die Download PDFInfo
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- CN213766678U CN213766678U CN202022604474.0U CN202022604474U CN213766678U CN 213766678 U CN213766678 U CN 213766678U CN 202022604474 U CN202022604474 U CN 202022604474U CN 213766678 U CN213766678 U CN 213766678U
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Abstract
The utility model provides an one-way preimpregnation area flooding mould of continuous fibers reinforcing thermoplasticity combined material, including last mould and lower mould, it forms the flooding passageway to go up mould and lower mould lock, the flooding passageway is including the preheating section, flooding section and the flat die orifice that connect gradually, the preheating section position is higher than flat die orifice position, flooding section one-tenth wave has a plurality of crests and trough, the flooding section wholly becomes the decline mode design, is close to be equipped with down the fuse-element passageway on the descending flow way of preheating section, with be equipped with down the fuse-element passageway on the descending flow way of a fuse-element passageway interval lift runner down, all be equipped with the semicircular flooding passageway of downwarping on first descending flow way and the second descending flow way, flooding section end and flat die orifice junction department are equipped with semi-circular glue storage pool. The utility model discloses a descending formula runner and flat die orifice design have increased the contact time and the area of carbon fiber and molten resin, force carbon fiber and molten resin pressurization, are favorable to improving the flooding effect.
Description
Technical Field
The utility model relates to a combined material technical field especially relates to one-way preimpregnation area impregnation mould of continuous fibers reinforcing thermoplasticity combined material.
Background
The continuous carbon fiber reinforced thermoplastic matrix composite material has the advantages of excellent mechanical property, high impact toughness, high damage capability, good environmental stability, short molding period, reusability and the like, so that the application range of the composite material is wider and wider, and the composite material also becomes one of hot materials for key research at home and abroad.
The forming method commonly used at present comprises a solution method, a melting method, a powder method, a fiber and resin mixing and knitting method, a monomer in-situ method and the like. These molding methods have difficulty in achieving sufficient penetration into the fiber bundle due to the high melt viscosity of the thermoplastic resin. So that more pores exist in the molded continuous carbon fiber reinforced thermoplastic composite material unidirectional prepreg tape, and the mechanical property is poor. The problem that the thermoplastic resin is difficult to impregnate continuous fibers is solved, the thermoplastic resin with low viscosity or high fluidity is basically selected, and the thermoplastic resin is changed into a flowable and dispersible state through changing equipment and a process, so that the thermoplastic resin is more favorable for being uniformly dispersed and impregnated into continuous fiber bundles.
The melt impregnation method is a method in which a thermoplastic resin is melted by heating and then fully contacted with continuous carbon fibers to interact with each other, thereby achieving impregnation. Generally, the viscosity of the thermoplastic resin after melting is very high, and continuous carbon fibers are difficult to be completely impregnated, which brings certain limitation to the application and popularization of a melt impregnation method. However, the molding method has the advantages of simple process, easy operation, no environmental pollution, accurate control of resin content and the like, and the application and popularization of the melt impregnation method can be increased as long as the impregnation effect of the thermoplastic resin on the continuous carbon fibers can be changed.
Patent No. CN2020037882U utility model discloses an impregnation mould of continuous fibers reinforcing thermoplastic composite is provided with cyclic annular wave mode continuous fibers flooding runner, and thermoplastic resin melt passageway links to each other with the flooding runner, and continuous fibers adhesion melting resin, extrusion through cyclic annular wave mode, continuous fibers are by force expansion, homodisperse, realize the parcel and the flooding of thermoplastic resin melt to continuous fibers. However, the impregnation die is designed to feed materials at one side, so that the resin content of the upper surface and the lower surface of the fiber belt is difficult to accurately control; the double-wave impregnation flow channel cannot randomly adjust the gap between the flow channels, is only suitable for the pre-impregnation of a single fiber bundle and is not suitable for the impregnation of a wide fiber band.
SUMMERY OF THE UTILITY MODEL
The utility model discloses the technical problem that will solve is: in order to overcome the defects in the prior art, the utility model provides an one-way prepreg tape dipping die of continuous fiber reinforced thermoplastic composite material.
The utility model provides a technical scheme that its technical problem will adopt is: a continuous fiber reinforced thermoplastic composite material unidirectional prepreg tape dipping die comprises an upper die and a lower die, wherein the upper die and the lower die are buckled to form a dipping channel with a gap, baffles for sealing the dipping channel are arranged on two sides of the lower die, the dipping channel comprises a preheating section, a dipping section and a flat die opening which are sequentially connected, the preheating section is arranged on one side of a feed inlet, the flat die opening is arranged on one side of a discharge outlet, the preheating section and the flat die opening are horizontally arranged, the position of the preheating section is higher than that of the flat die opening, the dipping section is in a wave shape and provided with a plurality of wave crests and wave troughs, the dipping section is integrally designed in a descending mode, the wave crests and the wave troughs are respectively formed by a descending flow channel and an ascending flow channel, a first descending flow channel close to the preheating section is provided with a lower melt channel, the lower melt channel is arranged on the lower die, and a second descending flow channel separated from the first descending flow channel by, the upper melt channel is arranged on the upper die, the first descending channel and the second descending channel are respectively provided with a semicircular dipping channel which is bent downwards, the semicircular dipping channel on the first descending channel is arranged on one side, close to the discharge port, of the lower melt channel, the semicircular dipping channel on the second descending channel is arranged on one side, close to the discharge port, of the upper melt channel, the tail section of the dipping section is a descending channel, and a semicircular glue storage pool which is bent downwards is arranged at the boundary of the dipping section and the flat die.
The baffle and the lower die are integrally processed, so that the melt in the die cavity of the die cannot overflow from two sides; the preheating section is used for preheating the continuous fibers and removing a certain amount of sizing agent; the dipping section can convert enough tension into pressure on the continuous fiber belt by staggering different peaks and valleys, so that the melt resin is pressed into the fiber bundle and wraps each fiber filament, and the melt resin fully impregnates the fibers; the feeding of the upper melt channel and the lower melt channel at the staggered positions can ensure that enough material quantity is provided, and the material can flow along the continuous fiber belt at the descending position to increase the contact area of the melt resin and the continuous fiber belt; two semicircular impregnation channels are designed for storing more melt resin and increasing the contact area of the melt resin and the continuous fiber belt; the flat die opening is used for scraping off redundant melt resin on the surface of the continuous impregnated fiber belt, and simultaneously plays a certain role in extruding the continuous impregnated fiber belt, so that the impregnation effect of the melt resin on the fiber bundle is further improved; the semicircular glue storage tank is mainly used for storing melt resin scraped from the flat die opening.
Further, go up mould and lower mould and be the P20 material, flooding passageway surface is the mirror surface, flooding passageway surface nitriding treatment, go up the cladding of mould and lower mould outer wall face and have the heating heated board.
The surface of the impregnation channel is a mirror surface and is used for reducing the friction force between the fiber band and the die, the heating insulation board is used for heating the die, on one hand, the preheating section preheats the continuous fibers, a certain amount of sizing agent can be removed, on the other hand, the heating insulation board is used for heating and insulating the melt pressed into the cavity, and the melt is prevented from being cooled and solidified.
Further, in order to ensure the impregnation effect of the impregnation section, the linear length of the impregnation section is 400-500mm, the impregnation section is provided with four valleys, the rounded corners of the valleys are arranged, the height of the first valley is 75-80mm, the height of the first peak is 95-100mm, the heights of the second and third peaks and valleys are equal, the difference between the first peak and valley and the second and third peaks and valleys is 20-25mm, and the difference between the fourth peak and valley and the second and third peaks and valleys is 20-25 mm.
The utility model has the advantages that:
(1) the high-temperature treatment of the fiber can efficiently remove the epoxy sizing agent on the fiber, the efficiency reaches 80 percent, and the impregnation effect is facilitated.
(2) The upper die is provided with the upper melt channel, and the lower die is provided with the lower melt channel, so that the resin content of the upper surface and the lower surface of the continuous carbon fiber belt can be accurately controlled.
(3) The damage to the fiber is small, and all the positions which can be contacted with the fiber in the equipment are arc angles.
(4) In the preparation process, except fibers and resin, no other impurities exist, and the performance of the unidirectional prepreg tape is favorably improved.
(5) The dipping time and area are increased, and the dipping effect is improved. Through the design of the descending runner and the flat die opening, the contact time and the contact area of the carbon fibers and the molten resin are increased, the carbon fibers and the molten resin are forced to be pressurized, and the impregnation effect is improved.
(6) The equipment has simple structure, easy operation, low cost and low energy consumption, and is suitable for continuous mass production of the continuous carbon fiber reinforced thermoplastic composite unidirectional prepreg tape.
Drawings
The present invention will be further explained with reference to the drawings and examples.
FIG. 1 is a schematic structural diagram of a preferred embodiment of the present invention;
FIG. 2 is a schematic cross-sectional view of a preferred embodiment of the present invention;
fig. 3 is a schematic structural view of the lower mold.
In the figure: 1. the device comprises an upper die, a lower die, 2-1 parts of a baffle, 3 parts of a preheating section, 4 parts of a dipping section, 5 parts of a flat die opening, 6 parts of a lower melt channel, 7 parts of an upper melt channel, 8 parts of a semicircular dipping channel, 9 parts of a semicircular glue storage tank.
Detailed Description
The present invention will now be described in detail with reference to the accompanying drawings. This figure is a simplified schematic diagram, and merely illustrates the basic structure of the present invention in a schematic manner, and therefore it shows only the constitution related to the present invention.
As shown in fig. 1-3, the utility model discloses an one-way preimpregnation area flooding mould of continuous fibers reinforcing thermoplasticity combined material, including last mould 1 and lower mould 2, it has the clearance to form the flooding passageway to go up mould 1 and 2 locks of lower mould, 2 both sides of lower mould are equipped with the baffle 2-1 that is used for sealing the flooding passageway, go up mould 1 width 800mm, 2 width 820mm of lower mould, die cavity width 800mm, baffle 2-1 width is 10mm, baffle 2-1 forms with 2 integrated into one piece processing of lower mould, baffle 2-1 is unanimous with last mould 1 size.
The dipping channel comprises a preheating section 3, a dipping section 4 and a flat die opening 5 which are connected in sequence, wherein the preheating section 3 is arranged on one side of a feed inlet, the length of the preheating section 3 is 100-150 mm, the flat die opening 5 is arranged on one side of a discharge outlet, the length of the flat die opening 5 is 100-150 mm, the preheating section 3 and the flat die opening 5 are both horizontally arranged, the position of the preheating section 3 is higher than that of the flat die opening 5, the dipping section 4 is waved and is provided with a plurality of wave crests and wave troughs, the dipping section 4 is integrally designed in a descending mode, the wave crests and the wave troughs are both formed by a descending flow channel and an ascending flow channel, a first descending flow channel close to the preheating section 3 is provided with a lower melt channel 6, the lower melt channel 6 is arranged on the lower die 2, a second descending flow channel separated from the first descending flow channel by an ascending flow channel is provided with an upper melt channel 7, the upper melt channel 7 is arranged on the upper die 1, the size of the upper melt channel opening 7 and the lower melt channel opening 6 is 750 x 10 mm; the lower melt channel 6 is located at the beginning of the descending position of the impregnation section 4 of the lower die 2 and is about 20-25mm away from the preheating section 3, and the upper melt channel 7 is located at the side of the first peak of the impregnation section 4 of the upper die 1 and is 20-25mm away from the first peak.
The first descending flow channel and the second descending flow channel are both provided with downward bent semicircular dipping channels 8, the radius of each dipping channel is 20mm, the semicircular dipping channels 8 on the first descending flow channel are arranged on one side, close to the discharge port, of the melt channel 6, the semicircular dipping channels 8 on the second descending flow channel are arranged on one side, close to the discharge port, of the melt channel 7, the tail section of the dipping section 4 is the descending flow channel, a downward bent semicircular glue storage tank 9 is arranged at the junction of the dipping section 4 and the flat die opening 5, and the radius of the dipping section is 10 mm.
Go up mould 1 and lower mould 2 and be the P20 material, flooding passageway surface is the mirror surface, flooding passageway surface nitriding treatment, it has the heating heated board to go up the cladding of mould 1 and the outer wall of lower mould 2.
The straight line length of the impregnation section 4 is 400-500mm, the impregnation section 4 is provided with four valleys, the rounded corners of the valleys are arranged, the radius of the rounded corners is R3, the height of the first valley is 75-80mm, the height of the first peak is 95-100mm, the heights of the second and third peaks and valleys are equal, the difference between the first peak and valley and the second and third peaks and valleys is 20-25mm, and the difference between the fourth peak and valley and the second and third peaks and valleys is 20-25 mm.
After the upper die 1 and the lower die 2 are closed, the gap of the preheating section 3 is 1-3mm, the gap of the impregnation end is 0.5-1mm, and the gap of the flat die opening 5 is 0.1-0.15 mm.
The impregnation method comprises the following steps:
the continuous fiber belt enters a die through a feed inlet, a certain amount of sizing agent on the surface of the fiber is removed through preheating in a preheating section 3, meanwhile, melt resin is pressed into an impregnation channel through a lower melt channel 6 and an upper melt channel 7, the continuous fiber belt passes through a port of the lower melt channel 6 and a first semicircular impregnation channel 8, so that enough melt resin is adhered to the lower surface of the continuous fiber belt, and a small amount of melt resin is extruded into primary impregnated fiber in the continuous fiber belt through extrusion of a first peak;
the preimpregnated continuous fiber belt passes through an upper melt channel 7 and a second semicircular impregnation channel 8, so that enough melt resin is adhered to the upper surface of the continuous fiber belt, and the continuous fiber belt is fully impregnated by extruding the wave crests and the wave troughs of the subsequent impregnation channel;
and scraping redundant melt resin on the surface of the continuous fiber belt through a flat die, and storing the melt resin into a semicircular glue storage tank 9 to obtain the qualified continuous fiber impregnated belt.
Directions and references (e.g., up, down, left, right, etc.) in the present disclosure may be used solely to aid in the description of the features in the figures. The following detailed description is, therefore, not to be taken in a limiting sense, and the scope of the claimed subject matter is defined only by the appended claims and equivalents thereof.
In light of the foregoing, it will be apparent to those skilled in the art from this disclosure that various changes and modifications can be made without departing from the scope of the invention. The technical scope of the present invention is not limited to the content of the specification, and must be determined according to the scope of the claims.
Claims (3)
1. The utility model provides a one-way preimpregnation area impregnation mould of continuous fibers reinforcing thermoplasticity combined material which characterized in that: comprises an upper die (1) and a lower die (2), wherein the upper die (1) and the lower die (2) are buckled to form a dipping channel through gaps, baffles (2-1) used for sealing the dipping channel are arranged on two sides of the lower die (2), the dipping channel comprises a preheating section (3), a dipping section (4) and a flat die opening (5) which are sequentially connected, the preheating section (3) is arranged on one side of a feed inlet, the flat die opening (5) is arranged on one side of a discharge outlet, the preheating section (3) and the flat die opening (5) are horizontally arranged, the position of the preheating section (3) is higher than that of the flat die opening (5), the dipping section (4) is waved and is provided with a plurality of wave crests and wave troughs, the dipping section (4) is integrally designed in a descending mode, the wave crests and the wave troughs are formed by a descending flow channel and an ascending flow channel, and a first descending flow channel close to the preheating section (3) is provided with a lower melt channel (6), melt channel (6) are located down on lower mould (2), with first descending runner is equipped with melt channel (7) on the second descending runner of an ascending runner of interval, go up melt channel (7) and locate on mould (1), all be equipped with downwarping semi-circular flooding passageway (8) on first descending runner and the second descending runner, melt channel (6) is close to the one side of discharge gate down is located to semi-circular flooding passageway (8) on the first descending runner, one side that melt channel (7) is close to the discharge gate is located to semi-circular flooding passageway (8) on the second descending runner, flooding section (4) tail section is for descending the runner, is equipped with downwarping semi-circular glue storage pool (9) with flat die mouth (5) juncture.
2. A continuous fiber reinforced thermoplastic composite unidirectional prepreg tape impregnation die as claimed in claim 1, wherein: go up mould (1) and lower mould (2) and be the P20 material, flooding passageway surface is the mirror surface, flooding passageway surface nitriding treatment, go up the cladding of mould (1) and lower mould (2) outer wall face and have the heating heated board.
3. A continuous fiber reinforced thermoplastic composite unidirectional prepreg tape impregnation die as claimed in claim 1 or 2, wherein: the straight line length of the impregnation section (4) is 400-500mm, the impregnation section (4) is provided with four valleys, the valleys are rounded, the height of the first valley is 75-80mm, the height of the first peak is 95-100mm, the heights of the second and third peaks and valleys are equal to each other along the direction from the preheating section (3) to the flat die opening (5), the difference between the first peak and valley and the second and third peaks and valleys is 20-25mm, and the difference between the fourth peak and valley and the second and third peaks and valleys is 20-25 mm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202022604474.0U CN213766678U (en) | 2020-11-11 | 2020-11-11 | Continuous fiber reinforced thermoplastic composite material unidirectional prepreg tape dipping die |
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|---|---|---|---|
| CN202022604474.0U CN213766678U (en) | 2020-11-11 | 2020-11-11 | Continuous fiber reinforced thermoplastic composite material unidirectional prepreg tape dipping die |
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| CN213766678U true CN213766678U (en) | 2021-07-23 |
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| CN202022604474.0U Active CN213766678U (en) | 2020-11-11 | 2020-11-11 | Continuous fiber reinforced thermoplastic composite material unidirectional prepreg tape dipping die |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114770978A (en) * | 2022-04-15 | 2022-07-22 | 哈尔滨工业大学 | Device and method for preparing composite material rib by using thermoplastic fiber reinforced resin-based prepreg tape |
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2020
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114770978A (en) * | 2022-04-15 | 2022-07-22 | 哈尔滨工业大学 | Device and method for preparing composite material rib by using thermoplastic fiber reinforced resin-based prepreg tape |
| CN114770978B (en) * | 2022-04-15 | 2024-04-12 | 哈尔滨工业大学 | Device and method for preparing composite material rib by using thermoplastic fiber reinforced resin-based prepreg tape |
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