阅读说明：本技术 一种用于纤维增强复合材料3d打印丝束耗材的制备装置 (Preparation device for fiber reinforced composite material 3D printing tow consumable ) 是由 王新筑 于 2020-07-28 设计创作，主要内容包括：本发明公开了一种用于纤维增强复合材料3D打印丝束耗材的制备装置,包括依次设置的放丝料架、纤维润湿段、冷却段和收丝卷绕装置,所述的纤维润湿段末端固定设置有成型段；所述的纤维润湿段包括油浴槽和树脂槽,所述的树脂槽套设在油浴槽中,所述的油浴槽的两端设置有加热棒；所述的成型段包括支架、夹持装置和磨具,所述的支架垂直固定在油浴槽的两侧,所述的夹持装置固定在支架上,所述的磨具固定夹持装置之间。该装置基于熔体拉挤浸渍技术,提高了连续纤维和基体的润湿性,减小制成丝束的孔隙率,提高了制成结构件的力学性能。(The invention discloses a preparation device for a fiber reinforced composite material 3D printing tow consumable, which comprises a filament discharging rack, a fiber wetting section, a cooling section and a filament winding device which are sequentially arranged, wherein a forming section is fixedly arranged at the tail end of the fiber wetting section; the fiber wetting section comprises an oil bath groove and a resin groove, the resin groove is sleeved in the oil bath groove, and heating rods are arranged at two ends of the oil bath groove; the forming section comprises supports, clamping devices and grinding tools, the supports are vertically fixed on two sides of the oil bath groove, the clamping devices are fixed on the supports, and the grinding tools are fixed between the clamping devices. The device is based on the melt pultrusion impregnation technology, improves the wettability of continuous fibers and a matrix, reduces the porosity of the prepared tows, and improves the mechanical property of the prepared structural member.)

1. The preparation device for the fiber reinforced composite material 3D printing tow consumable material is characterized by comprising a filament discharging rack (1), a fiber wetting section (2), a cooling section (4) and a filament winding device (5) which are sequentially arranged, wherein a forming section (3) is fixedly arranged at the tail end of the fiber wetting section (2);

the fiber wetting section (2) comprises an oil bath groove (25) and a resin groove (26), the resin groove (26) is sleeved in the oil bath groove (25), and heating rods (24) are arranged at two ends of the oil bath groove (25);

the forming section (3) comprises a support (31), a clamping device (32) and a grinding tool (33), the support (31) is vertically fixed on two sides of the oil bath groove (25), the clamping device (32) is fixed on the support (31), and the grinding tool (33) is fixed between the clamping device (32).

2. The preparation device for the consumable material for the fiber reinforced composite 3D printing tows, according to the claim 1, is characterized in that an oil bath cover (21) and a resin tank cover (22) are respectively clamped on the oil bath groove (25) and the resin groove (26), and wire grooves for the continuous fiber tows to pass through are formed in two ends of the oil bath cover (21) and the resin tank cover (22).

3. The preparation device for the consumable material for the fiber reinforced composite 3D printing tows as claimed in claim 2, wherein a first steering column (23) is erected at the front end in the oil bath groove (25), and second steering columns (27) are respectively and transversely fixed at two ends in the resin groove (26).

4. The apparatus according to claim 3, wherein the bracket (31) is located at the same position as the second steering column (27) at the inner end of the resin tank (26).

5. The preparation device of the consumable material for the fiber reinforced composite 3D printing tows according to claim 4, wherein the support (31) is of a concave structure, a sliding groove is formed in the concave support (31), the clamping device (32) is fixed to the sliding groove through a bolt, a third steering column (34) is arranged at the upper end of the clamping device (32), and the third steering column (34) is fixed to the sliding groove through a bolt.

6. The device for preparing the consumable material for the fiber reinforced composite material 3D printing tows according to the claim 1, wherein the cooling section (4) is composed of a base and a fourth steering column (41), and the fourth steering column (41) is erected at two ends of the base respectively.

7. The preparation device of the consumable material for the fiber reinforced composite 3D printing filament bundle according to claim 1, wherein the filament collecting and winding device (5) comprises a winding motor (51), a filament arranging motor (56), a filament arranging guide rail (52) and a filament collecting tray (55), the filament collecting tray (55) is connected with the winding motor (51) through a coupler, the filament arranging motor (56) is connected with a lead screw (53) through a coupler, the lead screw (53) is arranged on the filament arranging guide rail (52), a polish rod is arranged on the filament arranging guide rail (52) in parallel with the lead screw (53), and filament arranging slide blocks (54) are arranged on the lead screw (53) and the polish rod.

Technical Field

The invention belongs to the technical field of 3D printing, and particularly relates to a preparation device for a fiber reinforced composite material 3D printing tow consumable.

Background

The 3D printing technology of the continuous fiber reinforced composite material is a hotspot in the field of 3D printing at present, and the basic principle of the 3D printing technology is that a resin matrix and continuous fibers are fully mixed, the continuous fiber composite material is extruded from a heating spray head through a stepping motor, and materials extruded from a nozzle are stacked layer by utilizing a mechanical structure of a common 3D printer to manufacture various composite material structures with complex structures. Compared with a part manufactured by 3D printing with conventional 3D printing consumables such as PLA/ABS and the like, the part manufactured by 3D printing with the continuous fiber reinforced composite material has better mechanical property and is far superior to the part manufactured by 3D printing with the conventional 3D printing consumables such as PLA/ABS and the like in the aspects of tensile modulus, strength and the like.

However, in the existing 3D printing technology for the continuous fiber reinforced composite material, the continuous fiber and the resin matrix are directly wetted at the nozzle, which results in poor wettability of the matrix and the continuous fiber, and the manufactured structural member is easy to separate the fiber from the matrix when stressed, thereby greatly reducing the mechanical properties of the structural member.

Therefore, the invention is based on the melt pultrusion impregnation technology, adopts the pultrusion die head with a special structure, leads the continuous fibers which are uniformly dispersed and pre-tensioned to pass through the roller system in which the molten matrix resin flows among a series of wheel trains, repeatedly bears the alternate change for many times, promotes the forced impregnation of the fibers and the melt, and achieves the ideal impregnation effect.

Disclosure of Invention

In order to solve the defects in the prior art, the invention provides a preparation device for a fiber reinforced composite material 3D printing tow consumable material based on a melt pultrusion impregnation technology. Before 3D printing, the continuous fiber composite material tow consumable material is prepared in advance by using the method, so that the wettability of continuous fibers and a matrix is improved, the porosity of the prepared tow is reduced, and the mechanical property of the prepared structural member is improved.

In order to achieve the technical effects, the invention is specifically realized by the following technical scheme:

a preparation device for fiber reinforced composite material 3D printing tow consumables comprises a tow discharge rack, a fiber wetting section, a cooling section and a tow collecting winding device which are sequentially arranged, wherein a forming section is fixedly arranged at the tail end of the fiber wetting section;

the fiber wetting section comprises an oil bath groove and a resin groove, the resin groove is sleeved in the oil bath groove, and heating rods are arranged at two ends of the oil bath groove;

the forming section comprises supports, clamping devices and grinding tools, the supports are vertically fixed on two sides of the oil bath groove, the clamping devices are fixed on the supports, and the grinding tools are fixed between the clamping devices.

The oil bath groove and the resin groove are respectively clamped with an oil bath cover and a resin groove cover, and the two ends of the oil bath cover and the resin groove cover are provided with wire grooves for the continuous fiber tows to pass through.

The front end in the oil bath groove is provided with a first steering column in an erected mode, and two ends in the resin groove are respectively and transversely fixed with a second steering column.

The bracket and the second steering column at the inner tail end of the resin groove are positioned at the same position.

The support be concave type structure, be provided with the spout on concave type support, clamping device pass through the bolt and fix with the spout, clamping device can reciprocate along the spout, is provided with the third steering column in clamping device's upper end, the third steering column pass through bolt and spout fixed the setting.

The cooling section comprises base and fourth steering column, the base on both ends erect the fourth steering column respectively.

The wire winding device comprises a winding motor, a wire arranging guide rail and a wire collecting tray, wherein the wire collecting tray is connected with the winding motor through a coupler, the wire arranging motor is connected with a lead screw through the coupler, the lead screw is arranged on the wire arranging guide rail, a polished rod is arranged on the wire arranging guide rail in parallel with the lead screw, a wire arranging slider is arranged on the lead screw and the polished rod, and the wire arranging slider moves back and forth along the polished rod under the action of the lead screw.

When the required consumables are required to be prepared, the die is installed as required, and the height of the die clamping device is adjusted. And drawing out continuous fibers from the wire feeding rack, sequentially passing through the resin tank, the die and the wire collecting and winding device, starting the heating rod in advance, and restarting the wire collecting and winding device when the resin tank is heated to a set temperature, so that the preparation of required consumables can be realized.

When the oil bath is used, conventional low-temperature resin, including but not limited to common thermoplastic resin such as PLA, PP, ABS and the like, can be heated, when the high-temperature thermoplastic resin, including but not limited to resin such as PPS, PEEK and the like, is required to be heated, the resin groove is replaced by the high-temperature heating resin groove, a heating rod is designed on the high-temperature heating resin groove, the high-temperature heating resin groove is directly heated by the heating rod, and the oil bath groove is not required to be heated.

The invention has the beneficial effects that:

the device can realize the preparation of continuous fibers reinforcing combined material 3D printing consumables, and the continuous fibers reinforcing combined material 3D printing consumables prepared through the device and the method, the wettability between its base member and continuous fibers is better, and the porosity is littleer, can improve its mechanical properties greatly.

Drawings

FIG. 1 is a schematic diagram of the structure of the apparatus of the present invention;

FIG. 2 is a schematic structural view of the wetting section of the continuous fibers of the present invention;

FIG. 3 is a schematic view showing the structure of an oil bath and a resin bath according to the present invention;

FIG. 4 is a schematic structural view of a forming section of the present invention;

FIG. 5 is a schematic structural view of the cooling section of the present invention;

FIG. 6 is a schematic structural view of the take-up winder of the present invention;

FIG. 7 is a schematic view showing the structure of a high-temperature heating resin tank according to the present invention;

in the figure:

1. a wire discharging rack;

2. a fiber wetting section 21, an oil bath cover 22, a resin groove cover 23, a first steering column 24, a heating rod 25, an oil bath groove 26, a resin groove 27, a second steering column 28, a high-temperature heating resin groove 29 and a fifth steering column;

3. a forming section 31, a bracket 32, a clamping device 33, a grinding tool 34 and a third steering column;

4. a cooling section, 41, a fourth steering column;

5. the winding device comprises a winding device 51, a winding motor 52, a winding displacement guide rail 53, a lead screw 54, a winding displacement slide block 55, a winding material tray 56 and a winding displacement motor.

Detailed Description

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

As shown in fig. 1, the invention provides a preparation device for a fiber reinforced composite material 3D printing tow consumable, which comprises a filament placing rack 1, a fiber wetting section 2, a forming section 3, a cooling section 4 and a filament winding device 5. The silk work or material rest 1 sets up the front end at fibre section 2 that wets, and shaping section 3 vertical fixation is on fibre section 2 that wets, and cooling zone 4 sets up the rear end at fibre section 2 that wets, receives silk winding device 5 and sets up the rear end at cooling zone 4. The continuous fiber tows sequentially pass through the fiber wetting section 2, the forming section 3 and the cooling section 4 from the filament feeding rack 1 and then are collected for standby by the filament collecting and winding device 5.

As shown in fig. 2 and 3, the fiber wetting section 2 includes an oil bath 25 and a resin bath 26, wherein the resin bath 25 is sleeved with the resin bath 26, and heating rods 24 are provided at both ends of the oil bath 25. The oil bath groove 25 and the resin groove 26 are respectively clamped with an oil bath cover 21 and a resin groove cover 22, and the front end of the oil bath cover 21 and the two ends of the resin groove cover 22 are provided with wire grooves for the continuous fiber tows to pass through. The first steering column 23 is erected at the front end in the oil bath 25, and the second steering column 27 is fixed laterally at each end in the resin bath 26.

In use, the oil bath 25 is filled with heating oil, the resin bath 26 contains resin, the oil in the oil bath 25 is heated by the heating rod 24, and the resin in the resin bath 26 is uniformly heated by the oil bath, so that the resin is in a liquid state. The continuous fiber tows then pass from the filament supply rack 1 through the first steering column 23, the second steering column 27 at the front end of the resin tank 26, through the resin tank 26 and through the second steering column 27 at the rear end of the resin tank 26 to the forming section 3. The resin tank cover 22 is placed on the resin tank 26 for reducing heat loss of the resin tank 26, and the oil bath cover 21 is placed on the oil bath tank 25 for reducing heat loss of the oil bath tank 25.

As shown in fig. 4, the forming section 3 includes a bracket 31, a holding device 32 and a grinding tool 33, the bracket 31 is vertically fixed on both sides of the oil bath 25, the bracket 31 is located on the upper portion of the rear second steering column 27 in the resin bath 26, the holding device 32 is fixed on the bracket 31, and the grinding tool 33 is fixed between the holding devices 32. The bracket 31 is of a concave structure, a sliding groove is formed in the concave bracket 31, the clamping device 32 is fixed to the bracket 31 through a bolt, the clamping device 32 can move up and down along the sliding groove to adjust the height, the third steering column 34 is arranged at the upper end of the clamping device 32, and the third steering column 34 is fixedly arranged through the bolt and the sliding groove. The grinding tool 33 is hollow cylindrical and is fixed by the clamping device 32, and the fiber tows can pass through the grinding tool.

As shown in fig. 5, the cooling section 4 is composed of a base and a fourth steering column 41, and the fourth steering column 41 is erected on both ends of the base. The fiber tows from the forming section 3 pass through two fourth steering columns 41, a certain distance exists between the two fourth steering columns 41, and the fiber tows are cooled in a room temperature environment and then sent to the filament receiving and winding device 5.

As shown in fig. 6, the yarn take-up winding device 5 includes a winding motor 51, a winding displacement motor 56, a winding displacement guide rail 52 and a yarn take-up tray 55, wherein the yarn take-up tray 55 is connected with the winding motor 51 through a coupling, the winding displacement motor 56 is connected with a lead screw 53 through a coupling, the lead screw 53 is arranged on the winding displacement guide rail 52, two sides of the lead screw 53 are respectively provided with a polish rod, the polish rods are fixed on the winding displacement guide rail 52, the lead screw 53 and the polish rod are provided with a yarn displacement slider 54, the yarn displacement slider 54 is driven to move back and forth on the polish rod through the positive rotation and the reverse rotation of the lead screw 53, so.

As shown in fig. 7, when the melting temperature of the resin to be heated is high (for example, high temperature resistant thermoplastic resin such as PEEK), the high temperature heating resin tank 28 is used instead of the oil bath heating method, and the heating rod 24 is designed on the high temperature heating resin tank 28, so that the high temperature heating resin tank 28 is directly heated by the heating rod 24 without heating the oil bath. The high-temperature heating resin groove 28 is provided with high-temperature resistant covers, wire grooves are formed in two ends of each high-temperature resistant cover and used for fiber tows to pass through, and fifth steering columns 29 are arranged at two ends in the high-temperature heating resin groove 28. The fiber tows pass through the first steering column 23, pass through the high temperature heated resin tank through the fifth steering column 29, and then pass through the fifth steering column 29 to the forming section.

When the device is used, the winding motor 51 and the winding displacement motor 56 are started, the device works, continuous fibers are wetted in the resin groove 26, the continuous fibers move to move vertically and upwards through the fiber steering columns, after the continuous fibers come out of the resin groove 26, the continuous fibers are shaped through the die, cooled in the cooling section 4, and the prepared tows are wound into a coil through the take-up winding device 5.

Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.