阅读说明：本技术 连续碳纤维增强pps打印线材的制备系统、方法及其应用 (Preparation system and method of continuous carbon fiber reinforced PPS printing wire and application of preparation system ) 是由 张永毅 朱军 段满玉 张亦弛 罗时光 曲百红 于 2021-08-03 设计创作，主要内容包括：本发明公开了一种连续碳纤维增强PPS打印线材的制备系统、方法及其应用。所述制备方法包括：将聚苯硫醚母粒与增韧剂、抗氧化剂等混合后加热形成熔融态聚苯硫醚材料,并使碳纤维原丝连续通过所述熔融态聚苯硫醚材料,从而使碳纤维原丝表面包覆聚苯硫醚材料形成连续线材初成品,之后使所述连续线材初成品连续通过辊压器、至少一拉丝模,每一拉丝模均被设于一加热区内,直至收卷获得所述线材。本发明的制备方法简单、可控性高,能够实现连续碳纤维增强PPS打印线材的快速、连续、大规模生产,成本低,且所获产品的力学性能、3D打印加工性能优秀,在3D打印领域有广泛应用前景。(The invention discloses a preparation system and method and application of a continuous carbon fiber reinforced PPS printing wire. The preparation method comprises the following steps: the preparation method comprises the steps of mixing polyphenylene sulfide master batches, a toughening agent, an antioxidant and the like, heating to form a molten polyphenylene sulfide material, enabling carbon fiber precursors to continuously pass through the molten polyphenylene sulfide material, enabling the surfaces of the carbon fiber precursors to be coated with the polyphenylene sulfide material to form continuous wire rod primary finished products, enabling the continuous wire rod primary finished products to continuously pass through a roller press and at least one wire drawing die, and enabling each wire drawing die to be arranged in a heating area until the wire rod is obtained through rolling. The preparation method disclosed by the invention is simple, high in controllability, capable of realizing rapid, continuous and large-scale production of the continuous carbon fiber reinforced PPS printing wire, low in cost, excellent in mechanical property and 3D printing processability of the obtained product, and wide in application prospect in the field of 3D printing.)

1. A preparation method of a continuous carbon fiber reinforced PPS printing wire is characterized by comprising the following steps: mixing 92-98 parts by weight of polyphenylene sulfide master batch, 1-5 parts by weight of flexibilizer and 1-3 parts by weight of antioxidant, heating to form a molten polyphenylene sulfide material, enabling carbon fiber precursors to continuously pass through the molten polyphenylene sulfide material, so that the surfaces of the carbon fiber precursors are coated with the polyphenylene sulfide material to form continuous wire primary products, then enabling the continuous wire primary products to continuously pass through a roller press and at least one wire drawing die, wherein each wire drawing die is arranged in a heating zone until the continuous carbon fiber reinforced PPS printing wire is obtained by rolling.

2. The method according to claim 1, comprising:

mixing the polyphenylene sulfide master batch with a toughening agent and an antioxidant, and then performing single-screw extrusion, wherein the extrusion temperature is set to be 290-320 ℃, and the extrusion speed is set to be 1-10cm/s, so as to form the molten plastic material;

and/or adding a silane coupling agent into the molten polyphenylene sulfide material, wherein the amount of the silane coupling agent is 0.1-0.3 wt% of the total mass of the molten polyphenylene sulfide material;

and/or the toughening agent comprises SBS, SEBS, POE, TPO or TPV;

and/or, the antioxidant comprises antioxidant 1010, 1076, BHT or DSTDP;

preferably, the silane coupling agent comprises any one or a combination of more than two of gamma-aminopropyltriethoxysilane, gamma-glycidoxypropyltrimethoxysilane and gamma- (methacryloyloxy) propyltrimethoxysilane.

3. The method of claim 1, wherein: the gap of the roller is set to be 20-40 μm.

4. The method of claim 1, wherein: the wire drawing dies and the heating zones are multiple and are sequentially arranged along the advancing direction of the continuous wire rod primary product, the aperture of the wire drawing dies is gradually reduced along the advancing direction of the continuous wire rod primary product, and the temperature of the last heating zone is higher than that of the first heating zone; and/or the aperture of the wire-drawing die is 400-1000 mu m; and/or, the die comprises a tapered die; and/or the temperature of the heating zone is 310-320 ℃.

5. The preparation method according to claim 4, characterized by specifically comprising: and (3) enabling the continuous wire primary finished product to pass through a roller press, then sequentially passing through a first wire-drawing die, a second wire-drawing die and a third wire-drawing die, wherein the first wire-drawing die, the second wire-drawing die and the third wire-drawing die are respectively arranged in a first heating area, a second heating area and a third heating area, and then rolling to obtain the continuous carbon fiber reinforced PPS printing wire.

6. The method of claim 5, wherein: the first wire-drawing die, the second wire-drawing die and the third wire-drawing die are all conical wire-drawing dies, the aperture at the two ends of the first wire-drawing die is respectively 800 μm and 500 μm along with 1000-; the temperatures of the first heating zone, the second heating zone and the third heating zone are respectively 310 ℃, 310 ℃ and 320 ℃.

7. The method of claim 1, further comprising: detecting the diameter of the continuous carbon fiber reinforced PPS printing wire; and/or the winding speed of the continuous carbon fiber reinforced PPS printing wire is 1-10 m/s; and/or the tensile strength of the continuous carbon fiber reinforced PPS printing wire is more than or equal to 1200MPa, and the Young modulus is more than or equal to 60 GPa.

8. A continuous carbon fiber reinforced PPS printing wire produced by the method of any one of claims 1-7.

9. The utility model provides a preparation system of continuous carbon fiber reinforcing PPS printing wire, its characterized in that includes: the device comprises an unwinding mechanism, a plastic supply mechanism, a rolling device, at least one wire drawing die, at least one heating area and a winding mechanism, wherein each wire drawing die is arranged in the corresponding heating area;

the unwinding mechanism is used for continuously providing carbon fiber precursors;

the plastic supply mechanism is used for providing molten polyphenylene sulfide material;

the winding mechanism is at least used for:

the carbon fiber precursor is drawn to continuously pass through the molten polyphenylene sulfide material, so that the surface of the carbon fiber precursor is coated with the polyphenylene sulfide material to form a continuous wire primary finished product,

drawing the continuous wire primary product to continuously pass through the rolling device and at least one wire drawing die to form a continuous carbon fiber reinforced PPS printing wire, and

and rolling the continuous carbon fiber reinforced PPS printing wire.

10. The manufacturing system of claim 9, wherein: the plastic feeding mechanism comprises a single-screw extruder, and the extrusion temperature and the extrusion speed of the single-screw extruder are respectively set to 290-320 ℃ and 1-10 cm/s; and/or the gap of the rolling device is set to be 20-40 μm; and/or the preparation system comprises a first wire drawing die, a second wire drawing die and a third wire drawing die which are sequentially arranged along the advancing direction of the continuous wire primary product, wherein the first wire drawing die, the second wire drawing die and the third wire drawing die are respectively arranged in a first heating zone, a second heating zone and a third heating zone, the first wire drawing die, the second wire drawing die and the third wire drawing die are conical wire drawing dies, the aperture of two ends of the first wire drawing die is respectively 800 μm plus 1000-; and/or the preparation system further comprises a diameter detection mechanism for detecting the diameter of the continuous carbon fiber reinforced PPS printing wire; and/or the speed of the rolling mechanism for rolling the continuous carbon fiber reinforced PPS printing wire is set to be 1-10 m/s.

11. A 3D printing method, characterized by comprising: providing a printer with at least two printing nozzles, printing a polyphenylene sulfide printing wire by one printing nozzle, printing the continuous carbon fiber reinforced PPS printing wire according to claim 8 by the other printing nozzle, and setting the working parameters of each printing nozzle according to actual requirements so as to prepare the required 3D printing workpiece.

12. A3D printing device, which is characterized by comprising a control mechanism and at least two printing nozzle control mechanisms connected with the control mechanism, wherein one printing nozzle is used for printing a polyphenylene sulfide printing wire, the other printing nozzle is used for printing the continuous carbon fiber reinforced PPS printing wire of claim 8, and the control mechanism is used for adjusting the working parameters of each printing nozzle according to actual requirements.

Technical Field

The invention relates to a preparation method of a 3D printing wire, in particular to a preparation method of a continuous carbon fiber reinforced polyphenylene sulfide (PPS)3D printing wire, and belongs to the technical field of material science.

Background

Polyphenylene Sulfide (PPS) is a thermoplastic engineering plastic with excellent comprehensive performance, the melting point range of the PPS is 285-300 ℃, and the PPS material has many excellent performances such as outstanding heat resistance, long-term continuous use within the range of 200-240 ℃, good corrosion resistance, flame retardance, excellent dimensional stability and the like. Therefore, the PPS and the composite material thereof can be widely applied to a plurality of fields of machinery, automobiles, aerospace, electrical appliances, electronics and the like. In addition to the many advantages mentioned above, PPS also has several disadvantages, such as: the toughness is poor; the cost is high; the melt process is easy to generate thermal oxidation crosslinking reaction with oxygen, so that the viscosity is unstable. Therefore, in practical applications, the PPS is often required to be modified. On the other hand, in the field of aerospace and the like, parts with special-shaped structures are often required to be prepared, and if the parts are prepared by using the traditional molding modes such as injection molding extrusion, hot pressing and the like, the time consumption is long, and the cost of mold opening and the like is high. The 3D printing technology well solves the problems, parts with special-shaped structures can be printed at any time, a die opening link is omitted, time consumption is short, and cost is low. However, the parts printed by PPS have the defects of poor toughness, low strength and the like.

Disclosure of Invention

The invention mainly aims to provide a preparation method of a continuous carbon fiber reinforced PPS printing wire, so as to overcome the defects in the prior art.

In order to achieve the purpose, the technical scheme adopted by the invention comprises the following steps:

the preparation method of the continuous carbon fiber reinforced PPS printing wire provided by the embodiment of the invention comprises the following steps: mixing 92-98 parts by weight of polyphenylene sulfide master batch, 1-5 parts by weight of flexibilizer and 1-3 parts by weight of antioxidant, heating to form a molten polyphenylene sulfide material, enabling carbon fiber precursors to continuously pass through the molten polyphenylene sulfide material, so that the surfaces of the carbon fiber precursors are coated with the polyphenylene sulfide material to form continuous wire primary products, then enabling the continuous wire primary products to continuously pass through a roller press and at least one wire drawing die, wherein each wire drawing die is arranged in a heating zone until the continuous carbon fiber reinforced PPS printing wire is obtained by rolling.

The embodiment of the invention also provides the continuous carbon fiber reinforced PPS printing wire prepared by the method.

The embodiment of the invention also provides a preparation system of the continuous carbon fiber reinforced PPS printing wire, which comprises the following components: the device comprises an unwinding mechanism, a plastic supply mechanism, a rolling device, at least one wire drawing die, at least one heating area and a winding mechanism, wherein each wire drawing die is arranged in the corresponding heating area;

the unwinding mechanism is used for continuously providing carbon fiber precursors;

the plastic supply mechanism is used for providing molten polyphenylene sulfide material;

the winding mechanism is at least used for:

the carbon fiber precursor is drawn to continuously pass through the molten polyphenylene sulfide material, so that the surface of the carbon fiber precursor is coated with the polyphenylene sulfide material to form a continuous wire primary finished product,

drawing the continuous wire primary product to continuously pass through the rolling device and at least one wire drawing die to form a continuous carbon fiber reinforced PPS printing wire, and

and rolling the continuous carbon fiber reinforced PPS printing wire.

The embodiment of the invention also provides a 3D printing method, which comprises the following steps: providing a printer with at least two printing nozzles, printing a polyphenylene sulfide printing wire by one printing nozzle, printing the continuous carbon fiber reinforced PPS printing wire by the other printing nozzle, and setting working parameters of each printing nozzle according to actual requirements so as to prepare a required 3D printing workpiece.

The embodiment of the invention also provides 3D printing equipment which comprises a control mechanism and at least two printing nozzle control mechanisms connected with the control mechanism, wherein one printing nozzle is used for printing the polyphenylene sulfide printing wire, the other printing nozzle is used for printing the continuous carbon fiber reinforced PPS printing wire, and the control mechanism is used for adjusting the working parameters of each printing nozzle according to actual requirements.

Compared with the prior art, the invention has the advantages that:

(1) the preparation method of the continuous carbon fiber reinforced PPS printing wire is simple, high in controllability, capable of realizing rapid, continuous and large-scale production of the continuous carbon fiber reinforced PPS printing wire and low in cost;

(2) among the continuous carbon fiber reinforced PPS printing wire rod that provides, carbon fiber and polyphenylene sulfide are even compound, and the mechanical properties of wire rod, 3D print processability etc. all obtain showing and promote, and compare with current carbon fiber PPS combined material, can reach same intensity under the condition that the carbon fiber quantity reduces 5% -10%.

(3) According to the 3D printing method, the double-nozzle printer is adopted, topological optimization can be conveniently carried out according to actual requirements in the printing process, and high-strength carbon fiber reinforced PPS parts can be printed.

Drawings

FIG. 1 is a schematic diagram of a method of making a continuous carbon fiber reinforced PPS printed wire in an exemplary embodiment of the invention;

FIG. 2 is an electron microscope image of a cross section of a 3D printing wire sample prepared in example 1 of the present invention;

fig. 3 is a tensile strength test profile of a plurality of 3D printed wire samples prepared in the same batch in example 1 of the present invention;

fig. 4 is a tensile strength test profile of a plurality of 3D printed wire samples prepared in the same batch in example 2 of the present invention;

fig. 5 is a tensile strength test profile of a plurality of 3D printed wire samples prepared in the same batch in example 3 of the present invention.

Detailed Description

In view of the deficiencies in the prior art, the inventors of the present invention have made extensive studies and extensive practices to provide technical solutions of the present invention. The technical solution, its implementation and principles, etc. will be further explained as follows.

One aspect of the invention provides a preparation method of a continuous carbon fiber reinforced PPS printing wire, which comprises the following steps: mixing 92-98 parts by weight of polyphenylene sulfide master batch, 1-5 parts by weight of flexibilizer and 1-3 parts by weight of antioxidant, heating to form a molten polyphenylene sulfide material, enabling carbon fiber precursors to continuously pass through the molten polyphenylene sulfide material, so that the surfaces of the carbon fiber precursors are coated with the polyphenylene sulfide material to form continuous wire primary products, then enabling the continuous wire primary products to continuously pass through a roller press and at least one wire drawing die, wherein each wire drawing die is arranged in a heating zone until the continuous carbon fiber reinforced PPS printing wire is obtained by rolling.

In some embodiments, the preparation method specifically comprises: and mixing the polyphenylene sulfide master batch with a toughening agent and an antioxidant, and then performing single-screw extrusion, wherein the extrusion temperature is set to be 290-320 ℃, and the extrusion speed is set to be 1-10cm/s, so as to form the molten plastic material.

In some embodiments, the method of making further comprises: adding a silane coupling agent into the molten polyphenylene sulfide material, wherein the dosage of the silane coupling agent is 0.1-0.3 wt% of the mass of the molten polyphenylene sulfide material.

The silane coupling agent includes but is not limited to any one or the combination of more than two of gamma-aminopropyl triethoxysilane, gamma-glycidoxypropyl trimethoxysilane and gamma- (methacryloyloxy) propyl trimethoxysilane.

In some embodiments, the gap of the roller press is set to 20-40 μm.

In some embodiments, the wire-drawing dies and the heating zones are provided in plurality and sequentially arranged along the traveling direction of the continuous wire rod preform, and the aperture of the plurality of wire-drawing dies is gradually reduced along the traveling direction of the continuous wire rod preform, wherein the temperature of the last heating zone is higher than that of the first heating zone.

Of course, a plurality of drawing dies may be placed in a continuous heating zone in which the temperatures at the positions corresponding to the drawing dies are different and, as a whole, the temperatures are decreased in the traveling direction of the continuous strand preform.

In some embodiments, the aperture of the wire-drawing die is 400-1000 μm.

In some embodiments, the die comprises a conical die.

In some embodiments, the temperature of the heating zone is 310-320 ℃.

According to the invention, the PPS is wrapped on the surface of the carbon fiber more comprehensively, uniformly and without dead angles by alternately arranging a plurality of heating zones with different temperatures and wire drawing dies with different apertures, and the PPS can be penetrated into the carbon fiber under the conditions of repeated melting and repeated extrusion, so that a finally obtained 3D printing wire product is more mellow and smooth in surface, is beneficial to wire feeding of a printer in the 3D printing process, and simultaneously has excellent mechanical properties such as high tensile strength (not less than 1200MPa) and high Young modulus (not less than 60 GPa).

In some embodiments, the preparation method specifically comprises: and (3) enabling the continuous wire primary finished product to pass through a roller press, then sequentially passing through a first wire-drawing die, a second wire-drawing die and a third wire-drawing die, wherein the first wire-drawing die, the second wire-drawing die and the third wire-drawing die are respectively arranged in a first heating area, a second heating area and a third heating area, and then rolling to obtain the continuous carbon fiber reinforced PPS printing wire.

Further, the first wire drawing die, the second wire drawing die and the third wire drawing die are all conical wire drawing dies, the aperture at the two ends of the first wire drawing die is respectively 800 μm and 500 μm along with 1000-; the temperatures of the first heating zone, the second heating zone and the third heating zone are respectively 310 ℃, 310 ℃ and 320 ℃.

In some embodiments, the method of making further comprises: and detecting the diameter of the continuous carbon fiber reinforced PPS printing wire.

Among them, it is preferable to detect the diameter of the continuous carbon fiber reinforced PPS printed wire by a non-contact method (for example, a laser caliper or the like).

Further, the winding speed of the continuous carbon fiber reinforced PPS printing wire is 1-10 m/s.

Further, the toughening agent includes SBS, SEBS, POE, TPO, TPV, etc., and is not limited thereto.

Further, the antioxidant includes antioxidants 1010, 1076, BHT, DSTDP, etc., and is not limited thereto.

Another aspect of the invention provides a continuous carbon fiber reinforced PPS printing wire produced by the method.

Another aspect of the invention provides a system for preparing a continuous carbon fiber reinforced PPS printing wire, which can be applied to the method for preparing the continuous carbon fiber reinforced PPS printing wire. The preparation system comprises: the device comprises an unwinding mechanism, a plastic supply mechanism, a rolling device, at least one wire drawing die, at least one heating area and a winding mechanism, wherein each wire drawing die is arranged in the corresponding heating area;

the unwinding mechanism is used for continuously providing carbon fiber precursors;

the plastic supply mechanism is used for providing molten polyphenylene sulfide material;

the winding mechanism is at least used for:

the carbon fiber precursor is drawn to continuously pass through the molten polyphenylene sulfide material, so that the surface of the carbon fiber precursor is coated with the polyphenylene sulfide material to form a continuous wire primary finished product,

drawing the continuous wire primary product to continuously pass through the rolling device and at least one wire drawing die to form a continuous carbon fiber reinforced PPS printing wire, and

and rolling the continuous carbon fiber reinforced PPS printing wire.

In some embodiments, the plastic feeding mechanism comprises a single screw extruder, and the extrusion temperature and the extrusion speed of the single screw extruder are respectively set to 290-320 ℃ and 1-10 cm/s.

In some embodiments, the gap of the roller press is set to 20-40 μm.

In some embodiments, the manufacturing system includes a first wire-drawing die, a second wire-drawing die, and a third wire-drawing die disposed in sequence along a traveling direction of the continuous wire rod preform, and the first wire-drawing die, the second wire-drawing die, and the third wire-drawing die are disposed in the first heating zone, the second heating zone, and the third heating zone, respectively. The first wire drawing die, the second wire drawing die and the third wire drawing die are all conical wire drawing dies, the aperture at the two ends of the first wire drawing die is respectively 800 μm and 500 μm for 1000-. The temperatures of the first heating zone, the second heating zone and the third heating zone are respectively 310 ℃, 310 ℃ and 320 ℃.

In some embodiments, the production system further comprises a diameter detection mechanism (e.g., a laser caliper, etc.) for detecting a diameter of the continuous carbon fiber reinforced PPS print wire. The diameter detection mechanism may be disposed between the take-up mechanism and the last die.

In some embodiments, the speed at which the take-up mechanism takes up the continuous carbon fiber reinforced PPS printing wire is set to 1-10 m/s.

Further, most or even all components of the preparation system may be integrated in one apparatus, or may be provided separately, but the former solution is preferred.

Another aspect of the present invention provides a 3D printing method, including: providing a printer with at least two printing nozzles, printing a polyphenylene sulfide printing wire by one printing nozzle, printing the continuous carbon fiber reinforced PPS printing wire by the other printing nozzle, and setting working parameters of each printing nozzle according to actual requirements so as to prepare a required 3D printing workpiece.

Another aspect of the present invention provides a 3D printing apparatus, which includes a control mechanism and at least two printing nozzle control mechanisms connected to the control mechanism, wherein one printing nozzle is used for printing a polyphenylene sulfide printing wire, and the other printing nozzle is used for printing the continuous carbon fiber reinforced PPS printing wire, and the control mechanism is used for adjusting operating parameters of each printing nozzle according to actual requirements.

Further, 3D printing apparatus can print the principle design based on the FDM, and in utilizing it to print 3D work piece in-process, can carry out topology optimization to print out the carbon fiber reinforcement PPS part of high strength.

The solution of the invention will be further described below with reference to some more typical forces.

Example 1: referring to fig. 1, the embodiment provides a system for preparing a continuous carbon fiber reinforced PPS printing wire (hereinafter referred to as a 3D printing wire), including: the device comprises an unwinding mechanism, a single-screw extruder, a roller press, a conical wire-drawing die, a heating zone, a laser diameter gauge and a winding mechanism. Furthermore, the conical wire-drawing die and the heating zone are multiple, and the conical wire-drawing die and the heating zone comprise a first wire-drawing die, a second wire-drawing die and a third wire-drawing die which are sequentially arranged along the advancing direction of the primary finished product of the 3D printing wire rod, and the first wire-drawing die, the second wire-drawing die and the third wire-drawing die are respectively arranged in the first heating zone, the second heating zone and the third heating zone. The aperture of the two ends of the first wire-drawing die is respectively 1000 μm and 500 μm, the aperture of the two ends of the second wire-drawing die is respectively 500 μm and 450 μm, and the aperture of the two ends of the third wire-drawing die is respectively 450 μm and 400 μm. The temperatures of the first heating zone, the second heating zone and the third heating zone are respectively 310 ℃, 310 ℃ and 320 ℃.

With continued reference to fig. 1, the embodiment further provides a method for preparing the 3D printing wire by using the system, which includes:

continuously providing carbon fiber precursors (Dongli T300, 1K carbon fibers) by an unwinding mechanism;

mixing 98 parts by weight of polyphenylene sulfide master batch, 1 part by weight of toughener POE and 1 part by weight of antioxidant 1010, adding the mixture into a single-screw extruder, setting the extrusion temperature to be 290 ℃ and the extrusion speed to be 5cm/s, and forming a molten polyphenylene sulfide material;

continuously passing the carbon fiber precursor through the molten polyphenylene sulfide material under the traction action of a winding mechanism, so that the surface of the carbon fiber precursor is coated with the polyphenylene sulfide material to form a continuous wire primary product, and then continuously passing the continuous wire primary product through a roller press, wherein the gap of the roller press is set to be 20 micrometers;

and (3) enabling the continuous wire rod primary product subjected to rolling treatment by the roller press to sequentially pass through a first wire drawing die, a second wire drawing die and a third wire drawing die under the traction action of a winding mechanism to form the 3D printing wire rod, measuring the diameter of the 3D printing wire rod by using a laser diameter measuring device, and finally winding the 3D printing wire rod by using a winding mechanism, wherein the winding speed is set to be 8 m/s. The 3D printing wire prepared by the embodiment is round and smooth in surface. The cross-sectional profile of one of the samples is shown in FIG. 2. The tensile strength test results of 5 samples prepared from the same batch are shown in fig. 3.

In this embodiment, 3D printing may be performed by using a 3D printing apparatus, the apparatus includes a control mechanism and at least two printing nozzle control mechanisms connected to the control mechanism, one of the printing nozzles is used to print a polyphenylene sulfide printing wire, the other printing nozzle is used to print the continuous carbon fiber reinforced PPS printing wire, and the control mechanism is used to adjust operating parameters of each printing nozzle according to actual requirements. In actual production, working parameters of all printing nozzles can be set according to performance indexes of a required 3D printing workpiece, and the two printing nozzles work simultaneously or alternatively.

Comparative example 1: the 3D printing wire manufacturing system provided by this comparative example is substantially the same as example 1 except that: only one conical wire-drawing die with the aperture of 400 mu m is arranged between the rolling device and the rolling mechanism, and no heating area is arranged.

The preparation method of the 3D printing wire provided by this comparative example is also substantially the same as that of example 1, except that: the continuous wire rod primary product after the rolling treatment of the roller press passes through the conical wire drawing die with the aperture of 400 mu m under the traction action of the winding mechanism, so that a 3D printing wire rod is formed, the cross section of the wire rod is not round, the surface of the wire rod is rough, the wire feeding process of a printer is difficult in the 3D printing process, and the mechanical property and the like of the continuous wire rod primary product are obviously inferior to those of the product in the embodiment 1.

Example 2: this example provides a preparation system of continuous carbon fiber reinforcing PPS printing wire, basically the same as example 1, the difference is: the gap of the roller press was set to 40 μm; the apertures of the two ends of the first wire-drawing die are respectively 800 μm and 500 μm, the apertures of the two ends of the second wire-drawing die are respectively 500 μm and 450 μm, and the apertures of the two ends of the third wire-drawing die are respectively 450 μm and 400 μm.

The corresponding 3D printing wire preparation method comprises the following steps:

continuously providing carbon fiber precursor by using an unwinding mechanism;

mixing 92 parts by weight of polyphenylene sulfide master batch, 5 parts by weight of toughening agent TPO and 3 parts by weight of antioxidant DSTDP, and adding the mixture into a single-screw extruder, wherein the extrusion temperature is set to 290 ℃, and the extrusion speed is set to 1cm/s, so as to form a molten-state polyphenylene sulfide material;

under the traction action of a winding mechanism, enabling the carbon fiber precursor to continuously pass through the molten polyphenylene sulfide material, so that the surface of the carbon fiber precursor is coated with the polyphenylene sulfide material to form a continuous wire primary finished product, and then enabling the continuous wire primary finished product to continuously pass through a roller press;

and (2) enabling the continuous wire rod primary product subjected to rolling treatment by the roller press to sequentially pass through a first wire drawing die, a second wire drawing die and a third wire drawing die under the traction action of a winding mechanism to form the 3D printing wire rod, measuring the diameter of the 3D printing wire rod by using a laser diameter measuring device, and finally winding the 3D printing wire rod by using a winding mechanism, wherein the winding speed is set to be 1 m/s. The 3D printing wire prepared by the embodiment is round and smooth in surface. The tensile strength test results of 4 samples prepared from the same batch are shown in fig. 4.

Example 3: the embodiment provides a 3D printing wire manufacturing method implemented based on the manufacturing system of embodiment 1, and the manufacturing method includes:

continuously providing carbon fiber precursor by using an unwinding mechanism;

mixing 95 parts by weight of polyphenylene sulfide master batch, 3 parts by weight of flexibilizer and 2 parts by weight of antioxidant, adding the mixture into a single-screw extruder, setting the extrusion temperature to be 290 ℃ and the extrusion speed to be 10cm/s, and forming a molten polyphenylene sulfide material;

continuously passing the carbon fiber precursor through the molten polyphenylene sulfide material under the traction action of a winding mechanism, so that the surface of the carbon fiber precursor is coated with the polyphenylene sulfide material to form a continuous wire primary product, and then continuously passing the continuous wire primary product through a roller press, wherein the gap of the roller press is set to be 30 micrometers;

and (2) enabling the continuous wire rod primary product subjected to rolling treatment by the roller press to sequentially pass through a first wire drawing die, a second wire drawing die and a third wire drawing die under the traction action of a winding mechanism to form the 3D printing wire rod, measuring the diameter of the 3D printing wire rod by using a laser diameter measuring device, and finally winding the 3D printing wire rod by using a winding mechanism, wherein the winding speed is set to 10 m/s. The 3D printing wire prepared by the embodiment is round and smooth in surface. The tensile strength test results of 5 samples prepared from the same batch are shown in fig. 5.

Example 4: the 3D printing wire manufacturing method provided in this embodiment is substantially the same as embodiment 1, except that: after obtaining the molten polyphenylene sulfide material, 0.1 wt% of gamma-aminopropyltriethoxysilane was also added thereto, and thereafter the carbon fiber precursor was continuously passed through the molten polyphenylene sulfide material. The 3D printing wire product obtained in the embodiment is obviously improved in the aspects of tensile strength and the like compared with the product in the embodiment 1.

Example 5: the 3D printing wire manufacturing method provided in this embodiment is substantially the same as embodiment 1, except that: after obtaining the molten polyphenylene sulfide material, 0.3 wt% of gamma-glycidoxypropyltrimethoxysilane was also added thereto, and then the carbon fiber precursor was continuously passed through the molten polyphenylene sulfide material. The 3D printing wire product obtained in the embodiment is obviously improved in the aspects of tensile strength and the like compared with the product in the embodiment 1.

Example 6: the 3D printing wire manufacturing method provided in this embodiment is substantially the same as embodiment 1, except that: after obtaining the molten polyphenylene sulfide material, 0.2 wt% of gamma-glycidoxypropyltrimethoxysilane was also added thereto, and then the carbon fiber precursor was continuously passed through the molten polyphenylene sulfide material. The 3D printing wire product obtained in the embodiment is obviously improved in the aspects of tensile strength and the like compared with the product in the embodiment 1.

It should be understood that the above describes only some embodiments of the present invention and that various other changes and modifications may be affected therein by one of ordinary skill in the related art without departing from the scope or spirit of the invention.