A multi-input single-output polymer composite material pretreatment method and device

Abstract

The application provides a multi-input single-output polymer composite pretreatment method and device; the method comprises a double-shaft or triple-shaft triangular rotor mixing process and a single-shaft triangular rotor conveying process; the double-shaft or triple-shaft triangular rotor mixing process utilizes normal stress to mix and blend materials; the single-shaft triangular rotor conveying process utilizes normal displacement to meter and convey materials; the device comprises a long triangular rotor, one or two short triangular rotors, a double-hole or triple-hole barrel, a single-hole barrel, a transition flange, a wire die, a feeding port and a power assembly; the polymer composite is fed and mixed in the double-shaft or triple-shaft triangular rotor mixing process, and is metered and output in the single-shaft triangular rotor conveying process, and finally is pretreated into uniform wire of the polymer composite; the pretreatment method of the application integrates efficient mixing and blending and continuous and stable conveying, and has the characteristics of short process, high efficiency and low energy consumption.

Description

Technical Field

[0001] This invention relates to the field of polymer material pretreatment technology, and more specifically, to a method and apparatus for pretreatment of multi-inlet single-outlet polymer composite materials. Background Technology

[0002] In the field of traditional polymer material molding, injection molding remains one of the most important and widely used molding technologies. The raw materials used in injection molding are particles of polymer materials and their composite materials. Among them, polymer composite particles are obtained by first pre-treating polymer composite materials into wires, and then granulating them.

[0003] In the field of advanced manufacturing, 3D printing technology based on fused deposition modeling (FDM) has gradually occupied an important position in the field of polymer material molding due to its excellent customization advantages, especially in the molding of complex structural products. FDM technology has huge advantages over traditional plastic molding technology and is currently in a stage of rapid development. The raw materials used in FDM technology are filaments of polymer materials and their composite materials. Among them, polymer composite filaments are obtained by first pre-treating polymer composite materials to output filaments, and then drawing them.

[0004] Therefore, in both traditional molding and advanced manufacturing technologies, pretreatment is essential before molding polymer composites to improve their mixing uniformity and ensure the uniformity and stability of the molded product's performance. Traditional polymer composite pretreatment methods generally involve: first, using a twin-screw or triple-screw extruder to mix the polymer composite, utilizing strong shear to ensure the mixing, dispersion, and reaction of the polymer composite, especially the filled polymer composite system; then, outputting the filament, followed by cooling and granulation to obtain mixed polymer composite particles; finally, these particles are melt-conveyed through a single-screw extruder, utilizing the stable conveying capacity of the single screw to output filaments with uniform diameter and smooth surfaces. Traditional polymer composite pretreatment methods require two machines, subjecting the polymer composite to two thermomechanical processes and one cooling and granulation process, resulting in long cycles, low efficiency, and high energy consumption. Furthermore, the pretreatment of polymer composites is primarily driven by shear stress, leading to poor filler dispersion uniformity and a high degree of matrix thermal degradation. These problems result in high process costs and low material performance from traditional polymer composite pretreatment methods, hindering the development of injection molding and 3D printing technologies.

[0005] To address the shortcomings of traditional pretreatment methods for polymer composites, there is an urgent need to develop a novel pretreatment method and apparatus for polymer composites that integrates efficient mixing and compounding with continuous and stable conveying. This would enable short-process, high-efficiency, and low-energy-consumption pretreatment of polymer composites, while reducing thermomechanical degradation during pretreatment and improving the mixing and dispersion effect of the pretreated polymer composites. Summary of the Invention

[0006] The purpose of this invention is to provide a multi-inlet single-outlet pretreatment method and apparatus for polymer composite materials, so as to solve the problems of long cycle, low efficiency, high energy consumption and high cost of traditional polymer composite material pretreatment methods.

[0007] To achieve the above objectives, the present invention adopts the following technical solution.

[0008] A pretreatment method for multi-inlet single-outlet polymer composite materials includes a biaxial or triaxial triangular rotor mixing process and a single-axis triangular rotor conveying process. The biaxial or triaxial triangular rotor mixing process utilizes normal stress to mix and knead the materials, while the single-axis triangular rotor conveying process utilizes positive displacement to meter and convey the materials. The polymer composite material is fed and mixed in the biaxial or triaxial triangular rotor mixing process, and metered and output in the single-axis triangular rotor conveying process. Finally, the pretreatment results in a uniform polymer composite material wire.

[0009] A multi-inlet, single-outlet polymer composite material pretreatment device includes a long triangular rotor, one or two short triangular rotors, a double-hole or triple-hole barrel, a single-hole barrel, a transition flange, a wire die, a feed inlet, and a power assembly. The triangular rotor includes a triangular rotor shaft and a triangular rotor body. The triangular rotor body has a Reuleaux triangle cross-section and a helical structure along its axial direction. The barrel cavity is a straight hole without a helix. The long triangular rotor body includes a mixing section and a conveying section. The mixing section of the long triangular rotor body has the same length and pitch as the short triangular rotor body. The triangular rotor shaft is connected to the power assembly. The input end of the single-hole barrel is connected to the output end of the double-hole or triple-hole barrel. The wire die is connected to the output end of the single-hole barrel via the transition flange.

[0010] The rotation center axis of the triangular rotor is collinear with the axis of the triangular rotor shaft.

[0011] Preferably, the acute angle vertices of the triangular rotor body are rounded.

[0012] The mixing section of the Yangtze River Delta rotor body is close to the Yangtze River Delta rotor shaft, while the conveying section of the Yangtze River Delta rotor body is far away from the Yangtze River Delta rotor shaft.

[0013] Preferably, the pitch variation is large in the mixing section of the Yangtze River Delta rotor body, and small in the conveying section of the Yangtze River Delta rotor body.

[0014] The long triangular rotor body mixing section and the short triangular rotor body mesh within a double-hole or triple-hole barrel to form a double-shaft or triple-shaft triangular rotor mixing unit.

[0015] The meshing of the long triangular rotor body mixing section with the short triangular rotor body is the contact between the vertex of the long triangular rotor body and the arc edge of the short triangular rotor body, or the contact between the arc edge of the long triangular rotor body and the vertex of the short triangular rotor body.

[0016] The long triangular rotor body conveying section is located inside a single-hole barrel, forming a single-axis triangular rotor conveying unit.

[0017] Preferably, the long triangular rotor shaft is connected to the drive shaft of the power assembly.

[0018] Preferably, the device includes a long triangular rotor and a short triangular rotor, which are opposite to each other. The helical direction of the opposite long triangular rotor is clockwise, and the helical direction of the opposite short triangular rotor is counterclockwise. The mixing section of the opposite long triangular rotor and the opposite short triangular rotor are synchronously meshed in opposite directions within an opposite double-hole barrel, forming an opposite dual-axis triangular rotor mixing unit. The phase difference between the opposite long triangular rotor and the opposite short triangular rotor is 30°, and the distance between the rotation center axes of the opposite long triangular rotor and the opposite short triangular rotor is equal to the radius of the arc of the triangular rotor body. The opposing triangular rotor body conveying sections are located inside opposing single-hole barrels, forming opposing single-axis triangular rotor conveying units.

[0019] Preferably, the device includes a long triangular rotor and a short triangular rotor, which are co-directional long triangular rotors and co-directional short triangular rotors, respectively. The helical directions of the co-directional long triangular rotor body and the co-directional short triangular rotor body are the same and have no phase difference. The co-directional long triangular rotor body mixing section and the co-directional short triangular rotor body are synchronously meshed in the co-directional double-hole barrel to form a co-directional double-axis triangular rotor mixing unit. The distance between the rotation center axis of the co-directional long triangular rotor and the rotation center axis of the co-directional short triangular rotor is equal to the radius of the arc of the triangular rotor body. The co-directional long triangular rotor body conveying section is in the co-directional single-hole barrel to form a co-directional single-axis triangular rotor conveying unit.

[0020] Preferably, the device includes one long triangular rotor and two short triangular rotors, namely a left short triangular rotor, a middle long triangular rotor, and a right short triangular rotor. The spiral directions of the left short triangular rotor body, the middle long triangular rotor body, and the right short triangular rotor body are the same and have no phase difference. The mixing section of the left short triangular rotor body, the middle long triangular rotor body, and the right short triangular rotor body are meshed synchronously in the same direction in a straight line within a three-hole barrel, forming a three-axis triangular rotor mixing unit. The distance between the rotation center axis of the left short triangular rotor and the rotation center axis of the middle long triangular rotor is equal to the radius of the arc of the triangular rotor body, and the distance between the rotation center axis of the middle long triangular rotor and the rotation center axis of the right short triangular rotor is also equal to the radius of the arc of the triangular rotor body. The conveying section of the middle long triangular rotor body is located within a middle single-hole barrel, forming a middle single-axis triangular rotor conveying unit.

[0021] The present invention has the following advantages and beneficial effects: 1. The mixing process of the present invention is dominated by normal stress, which can achieve stable feeding and uniform mixing of polymer composite materials, and improve mixing efficiency and mixing uniformity. 2. The conveying process of this invention is driven by positive displacement, which can realize accurate metering and stable output of polymer composite materials, and improve conveying efficiency and output stability; 3. The multi-inlet single-outlet pretreatment method of the present invention can reduce the thermal degradation caused by multiple processing of polymer composite materials, shorten the pretreatment cycle of polymer composite materials, and help improve the performance of composite materials and reduce costs. 4. The multi-inlet single-outlet pretreatment device of the present invention can reduce the investment in equipment and site for pretreatment of polymer composite materials, shorten the pretreatment process of polymer composite materials, and help improve efficiency and reduce energy consumption. Attached Figure Description

[0022] Figure 1 This is an overall structural diagram of the pretreatment device for polymer composite materials with opposing dual inlets and single outlets in Example 1.

[0023] Figure 2 This is a schematic diagram of the principle of the pretreatment device for polymer composite materials with opposing dual inlets and single outlets in Example 1.

[0024] Figure 3 yes Figure 2 AA sectional view.

[0025] Figure 4 yes Figure 2 BB section view.

[0026] Figure 5 yes Figure 2 Enlarged view of section I in the middle.

[0027] Figure 6This is a schematic diagram of the opposing single-hole barrel structure in Embodiment 1.

[0028] Figure 7 This is a structural diagram of the pretreatment device for polymer composite materials with unidirectional dual inlet and single outlet in Example 2.

[0029] Figure 8 This is a schematic diagram of the principle of the pretreatment device for polymer composite materials with unidirectional dual inlet and single outlet in Example 2.

[0030] Figure 9 yes Figure 8 CC section view.

[0031] Figure 10 This is a schematic diagram of the single-hole barrel structure in the same direction, as shown in Example 2.

[0032] Figure 11 This is an overall structural diagram of the three-inlet single-outlet polymer composite material pretreatment device in Example 3.

[0033] Figure 12 This is a schematic diagram of the principle of the three-inlet single-outlet polymer composite material pretreatment device in Example 3.

[0034] Figure 13 yes Figure 12 DD section view.

[0035] Figure 14 This is a schematic diagram of the single-hole barrel structure in Example 3.

[0036] Among them, 100 - opposing long triangular rotors, 110 - opposing long triangular rotor shafts, 120 - opposing long triangular rotor bodies, 121 - opposing long triangular rotor body mixing section, 122 - opposing long triangular rotor body conveying section, 200 - opposing short triangular rotors, 210 - opposing short triangular rotor shafts, 220 - opposing short triangular rotor bodies, 300 - opposing double-hole barrels, 400 - opposing single-hole barrels, 410 - opposing single-hole barrels Shallow hole at cylinder input end, 420 - main bore of counter-rotating single-hole cylinder, 500 - transition flange, 600 - wire die, 700 - feed inlet, 800 - co-directional long triangular rotor, 810 - co-directional long triangular rotor shaft, 820 - co-directional long triangular rotor body, 821 - co-directional long triangular rotor body mixing section, 822 - co-directional long triangular rotor body conveying section, 900 - co-directional short triangular rotor, 910 - co-directional short triangular rotor shaft, 920 - Same-direction short triangular rotor body, 1000- Same-direction double-hole barrel, 1100- Same-direction single-hole barrel, 1110- Same-direction single-hole barrel input shallow hole, 1120- Same-direction single-hole barrel main hole, 1200- Right short triangular rotor, 1210- Right short triangular rotor shaft, 1220- Right short triangular rotor body, 1300- Middle long triangular rotor, 1310- Middle long triangular rotor shaft, 1320- Middle long triangular rotor body 1321 - Mixing section of the middle long triangular rotor body; 1322 - Conveying section of the middle long triangular rotor body; 1400 - Left short triangular rotor; 1410 - Left short triangular rotor shaft; 1420 - Left short triangular rotor body; 1500 - Three-hole barrel; 1600 - Middle single-hole barrel; 1610 - Right shallow hole at the input end of the middle single-hole barrel; 1620 - Main hole of the middle single-hole barrel; 1630 - Left shallow hole at the input end of the middle single-hole barrel. L The distance between the rotation center axes of the two triangular rotors. Detailed Implementation

[0037] The present invention will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the following text is only used to describe several specific embodiments of the present invention and does not strictly limit the scope of protection specifically claimed by the present invention.

[0038] Example 1

[0039] like Figure 1 As shown, the opposing dual-inlet single-outlet polymer composite material pretreatment device of this embodiment includes opposing long triangular rotors 100, opposing short triangular rotors 200, opposing double-hole barrels 300, opposing single-hole barrels 400, transition flanges 500, wire die 600, feed inlet 700, and power components.

[0040] like Figure 2As shown, the opposing long triangular rotor 100 includes an opposing long triangular rotor shaft 110 and an opposing long triangular rotor body 120, and the opposing short triangular rotor 200 includes an opposing short triangular rotor shaft 210 and an opposing short triangular rotor body 220. The axial direction of the triangular rotor body is a helical structure. The helix direction of the opposing long triangular rotor body 120 is clockwise, and the helix direction of the opposing short triangular rotor body 220 is counterclockwise. The inner cavity of the barrel is a straight hole without a helix. The opposing long triangular rotor body 120 includes a mixing section and a conveying section. The pitch of the mixing section 121 of the opposing long triangular rotor body has a large variation, while the pitch of the conveying section 122 of the opposing long triangular rotor body has a small variation. The length and pitch of the mixing section 121 of the opposing long triangular rotor body and the opposing short triangular rotor body 220 are equal. The opposing long-angle triangular rotor body mixing section 121 and the opposing short-angle triangular rotor body 220 are meshed in the opposing double-hole barrel 300 to form an opposing double-shaft triangular rotor mixing unit. The opposing long-angle triangular rotor body mixing section 121 and the opposing short-angle triangular rotor body 220 have several meshing points. The opposing long-angle triangular rotor body conveying section 122 is in the opposing single-hole barrel 400 to form an opposing single-shaft triangular rotor conveying unit. The opposing long-angle rotor shaft 110 and the opposing short-angle rotor shaft 210 are respectively connected to the power component. The opposing long-angle rotor shaft 110 is connected to the drive shaft of the power component. The input end of the opposing single-hole barrel 400 is connected to the output end of the opposing double-hole barrel 300. The wire die 600 is connected to the output end of the opposing single-hole barrel 400 through the transition flange 500.

[0041] like Figure 3 As shown, the cross-sections of the opposing long triangular rotor body mixing section 121 and the opposing short triangular rotor body 220 are both Reuleaux triangles. The acute angle vertices of the triangular rotor bodies are rounded. The phase difference between the opposing long triangular rotor body mixing section 121 and the opposing short triangular rotor body 220 is 30°. The distance between the rotation center axis of the opposing long triangular rotor 100 and the rotation center axis of the opposing short triangular rotor 200 is... L Equal to the radius of the arc of the triangular rotor body times; such as Figure 4 As shown, the three vertices of the opposing long triangular rotor body conveying section 122 divide the inner cavity of the opposing single-hole barrel 400 into three parts; as Figure 5 , Figure 6 As shown, the shallow hole 410 at the input end of the opposing single-hole barrel has a certain slope and corresponds to the opposing short triangular rotor body 220. The material output from the opposing short triangular rotor body 220 enters the main hole 420 of the opposing single-hole barrel through the shallow hole 410 at the input end of the opposing single-hole barrel with a slope.

[0042] When the triangular rotors rotate synchronously in opposite directions, in the opposing dual-axis triangular rotor mixing unit, the cavity volume between the opposing long triangular rotor body mixing section 121 and the opposing short triangular rotor body 220 is periodically divided and closed radially, exhibiting a large-small-large cyclic change, generating radial normal stress; the cavity volume is periodically compressed and released axially, generating axial normal stress; the material enters the opposing dual-axis triangular rotor mixing unit from the feed port 700, and the normal stress can efficiently melt, mix, and disperse the polymer composite material, and transport it to the opposing single-axis triangular rotor conveying unit; in the opposing single-axis triangular rotor mixing unit, the three vertices of the opposing long triangular rotor body conveying section 122 forcibly push the material in the three cavities to be output alternately, and the precise metering and stable output of the polymer composite material is achieved through positive displacement conveying action, and finally the polymer composite material wire is output from the wire die 600.

[0043] Example 2

[0044] like Figure 7 As shown, the pretreatment device for polymer composite materials with co-directional dual inlet and single outlet in this embodiment includes a co-directional long triangular rotor 800, a co-directional short triangular rotor 900, a co-directional double-hole barrel 1000, a co-directional single-hole barrel 1100, a transition flange 500, a wire die 600, a feed inlet 700, and a power assembly.

[0045] like Figure 8 As shown, the co-directional long triangular rotor 800 includes a co-directional long triangular rotor shaft 810 and a co-directional long triangular rotor body 820, and the co-directional short triangular rotor 900 includes a co-directional short triangular rotor shaft 910 and a co-directional short triangular rotor body 920. The axial direction of the triangular rotor body is a helical structure. The helical direction of the co-directional long triangular rotor body 820 is the same as that of the co-directional short triangular rotor body 920. The inner cavity of the barrel is a straight hole without a helix. The co-directional long triangular rotor body 820 includes a mixing section and a conveying section. The pitch of the mixing section 821 of the co-directional long triangular rotor body varies greatly, while the pitch of the conveying section 822 of the co-directional long triangular rotor body varies little. The length and pitch of the mixing section 821 of the co-directional long triangular rotor body are equal to those of the co-directional short triangular rotor body 920. The co-directional long triangular rotor body mixing section 821 and the co-directional short triangular rotor body 920 mesh within the co-directional double-hole barrel 1000, forming a co-directional double-shaft triangular rotor mixing unit. The co-directional long triangular rotor body mixing section 821 and the co-directional short triangular rotor body 920 have countless meshing points, and the line connecting the meshing points forms a spiral. The co-directional long triangular rotor body conveying section 822 is located within the co-directional single-hole barrel 1100, forming a co-directional single-shaft triangular rotor conveying unit. The co-directional long triangular rotor shaft 810 and the co-directional short triangular rotor shaft 910 are respectively connected to the power assembly, and the co-directional long triangular rotor shaft 810 is connected to the drive shaft of the power assembly. The input end of the co-directional single-hole barrel 1100 is connected to the output end of the co-directional double-hole barrel 1000, and the wire die 600 is connected to the output end of the co-directional single-hole barrel 400 through the transition flange 500.

[0046] like Figure 9 As shown, the cross-sections of the mixing section 821 and the short triangular rotor body 920 in the same direction are both Reuleaux triangles. The acute vertices of the triangular rotor bodies are rounded. There is no phase difference between the mixing section 821 and the short triangular rotor body 920 in the same direction. The distance between the rotation center axis of the long triangular rotor 800 and the rotation center axis of the short triangular rotor 900 is... L Equal to the radius of the arc of the triangular rotor body; such as Figure 10 As shown, the shallow hole 1110 at the input end of the single-hole barrel in the same direction has a certain slope and corresponds to the short triangular rotor body 920 in the same direction. The material output from the short triangular rotor body 920 enters the main hole 1120 of the single-hole barrel in the same direction through the shallow hole 1110 at the input end of the single-hole barrel in the same direction with a slope.

[0047] When the triangular rotors rotate synchronously in the same direction, in the co-directional dual-axis triangular rotor mixing unit, the cavity volume between the co-directional long triangular rotor body mixing section 821 and the co-directional short triangular rotor body 920 is periodically divided and closed radially, exhibiting a large-small-large cyclic change, generating radial normal stress; the cavity volume is periodically compressed and released axially, generating axial normal stress; the material enters the co-directional dual-axis triangular rotor mixing unit from the feed port 700, and the normal stress can efficiently melt, mix, and disperse the polymer composite material, and transport it to the co-directional single-axis triangular rotor conveying unit; in the co-directional single-axis triangular rotor mixing unit, the three vertices of the co-directional long triangular rotor body conveying section 822 forcibly push the material in the three cavities to be output alternately, and the precise metering and stable output of the polymer composite material is achieved through positive displacement conveying, and finally the polymer composite material wire is output from the wire die 600.

[0048] Example 3

[0049] like Figure 11As shown, the three-inlet single-outlet polymer composite material pretreatment device of this embodiment includes a right short triangular rotor 1200, a middle long triangular rotor 1300, a left short triangular rotor 1400, a three-hole barrel 1500, a middle single-hole barrel 1600, a transition flange 500, a wire die 600, a feed port 700, and a power assembly.

[0050] like Figure 12 As shown, the right short triangular rotor 1200 includes a right short triangular rotor shaft 1210 and a right short triangular rotor body 1220; the middle long triangular rotor 1300 includes a middle long triangular rotor shaft 1310 and a middle long triangular rotor body 1320; and the left short triangular rotor 1400 includes a left short triangular rotor shaft 1410 and a left short triangular rotor body 1420. The axial direction of the triangular rotor body is a helical structure. The helical directions of the right short triangular rotor body 1220, the middle long triangular rotor body 1320, and the left short triangular rotor body 1420 are the same. The inner cavity of the barrel is a straight hole without helix. The middle long triangular rotor body 1320 includes a mixing section and a conveying section. The pitch of the mixing section 1321 of the middle long triangular rotor body varies greatly, while the pitch of the conveying section 1322 of the middle long triangular rotor body varies little. The length and pitch of the mixing section 1321 of the middle long triangular rotor body are equal to those of the right short triangular rotor body 1220 and the left short triangular rotor body 1420. Within the three-hole barrel 1500, the right short triangular rotor body 1220 and the middle long triangular rotor body mixing section 1321 mesh, and the middle long triangular rotor body mixing section 1321 and the left short triangular rotor body 1420 mesh, forming a three-axis triangular rotor mixing unit. The right short triangular rotor body 1220 and the middle long triangular rotor body mixing section 1321 have numerous meshing points, and the line connecting these meshing points forms a spiral. Similarly, the middle long triangular rotor body mixing section 1321 and the left short triangular rotor body 1420 also have numerous meshing points, and the line connecting these meshing points forms a spiral. It is also a spiral; the middle long triangular rotor body conveying section 1322 is inside the middle single-hole barrel 1600, forming the middle single-shaft triangular rotor conveying unit; the right short triangular rotor shaft 1210, the middle long triangular rotor shaft 1310 and the left short triangular rotor shaft 1410 are respectively connected to the power component, and the middle long triangular rotor shaft 1310 is connected to the drive shaft of the power component; the input end of the middle single-hole barrel 1600 is connected to the output end of the three-hole barrel 1500, and the wire die 600 is connected to the output end of the opposite single-hole barrel 400 through the transition flange 500.

[0051] like Figure 13As shown, the cross-sections of the right short triangular rotor body 1220, the middle long triangular rotor body mixing section 1321, and the left short triangular rotor body 1420 are all Reuleaux triangles. The acute angle vertices of the triangular rotor bodies are rounded. There is no phase difference between the right short triangular rotor body 1220, the middle long triangular rotor body mixing section 1321, and the left short triangular rotor body 1420. The distance between the rotation center axis of the right short triangular rotor 1220 and the rotation center axis of the middle long triangular rotor 1320 is... L It is equal to the radius of the arc of the triangular rotor body, and the distance between the rotation center axes of the middle long triangular rotor (1300) and the left short triangular rotor (1400). L It is also equal to the radius of the arc of the triangular rotor body.

[0052] like Figure 14 As shown, the right shallow hole 1610 at the input end of the middle single-hole barrel has a certain slope and corresponds to the right short triangular rotor body 1220. The material output from the right short triangular rotor body 1220 enters the main hole 1620 of the middle single-hole barrel through the right shallow hole 1610 at the input end of the middle single-hole barrel with the slope. The left shallow hole 1630 at the input end of the middle single-hole barrel has a certain slope and corresponds to the left short triangular rotor body 1420. The material output from the left short triangular rotor body 1420 enters the main hole 1620 of the middle single-hole barrel through the left shallow hole 1630 at the input end of the middle single-hole barrel with the slope.

[0053] When the triangular rotors rotate synchronously in the same direction, in the three-axis triangular rotor mixing unit, the volume of the cavity between the right short triangular rotor body 1220, the middle long triangular rotor body mixing section 1321, and the left short triangular rotor body 1420 is periodically divided and closed radially, exhibiting a large-small-large cyclic change, generating radial normal stress; the cavity volume is periodically compressed and released axially, generating axial normal stress; the material enters the three-axis triangular rotor mixing unit from the feed port 700, and the normal stress can efficiently melt, mix, and disperse the polymer composite material, and transport it to the middle single-axis triangular rotor conveying unit; in the middle single-axis triangular rotor mixing unit, the three vertices of the middle long triangular rotor body conveying section 1322 forcibly push the material in the three cavities to be output alternately, and the precise metering and stable output of the polymer composite material is achieved through positive displacement conveying, and finally the polymer composite material wire is output from the wire die 600.

[0054] The above description is merely a preferred embodiment of the present invention. It should be noted that those skilled in the art can make various improvements and modifications without departing from the principles of the present invention, and these improvements and modifications should also be considered within the scope of protection of the present invention. Structures, devices, and operating methods not specifically described or explained in this invention are implemented according to conventional methods in the art unless otherwise specified or limited.

Claims

1. A pretreatment method for multi-inlet single-outlet polymer composite materials, characterized in that, It includes a biaxial or triaxial triangular rotor mixing process and a single-axis triangular rotor conveying process. The biaxial or triaxial triangular rotor mixing process uses normal stress to mix and blend the materials, while the single-axis triangular rotor conveying process uses positive displacement to meter and convey the materials. The polymer composite material is fed and mixed in the biaxial or triaxial triangular rotor mixing process, and metered and output in the single-axis triangular rotor conveying process. Finally, it is pre-treated to produce a uniform wire of polymer composite material.

2. A multi-inlet single-outlet polymer composite material pretreatment device for implementing the method of claim 1, characterized in that, The device includes a long triangular rotor, one or two short triangular rotors, a double-hole or triple-hole barrel, a single-hole barrel, a transition flange, a wire die, a feed inlet, and a power assembly. The triangular rotor includes a triangular rotor shaft and a triangular rotor body. The cross-section of the triangular rotor body is a Reuleaux triangle, and the axial direction is a helical structure. The inner cavity of the barrel is a straight hole without a helix. The body of the long triangular rotor includes a mixing section and a conveying section. The mixing section of the long triangular rotor body has the same length and pitch variation as the short triangular rotor body. The triangular rotor shaft is connected to the power assembly. The input end of the single-hole barrel is connected to the output end of the double-hole or triple-hole barrel. The wire die is connected to the output end of the single-hole barrel through a transition flange.

3. The apparatus according to claim 2, characterized in that, The rotation center axis of the triangular rotor is collinear with the axis of the triangular rotor shaft.

4. The apparatus according to claim 2, characterized in that, The mixing section of the Yangtze River Delta rotor body is close to the Yangtze River Delta rotor shaft, while the conveying section of the Yangtze River Delta rotor body is far away from the Yangtze River Delta rotor shaft.

5. The apparatus according to claim 2, characterized in that, The long triangular rotor body mixing section and the short triangular rotor body mesh within a double-hole or triple-hole barrel to form a double-shaft or triple-shaft triangular rotor mixing unit.

6. The apparatus according to claim 5, characterized in that, The meshing of the long triangular rotor body mixing section with the short triangular rotor body is the contact between the vertex of the long triangular rotor body and the arc edge of the short triangular rotor body, or the contact between the arc edge of the long triangular rotor body and the vertex of the short triangular rotor body.

7. The apparatus according to claim 2, characterized in that, The long triangular rotor body conveying section is located inside a single-hole barrel, forming a single-axis triangular rotor conveying unit.

8. The apparatus according to any one of claims 2-7, characterized in that, It includes one long triangular rotor and one short triangular rotor, which are opposite each other. The helix direction of the long triangular rotor is clockwise, and the helix direction of the short triangular rotor is counterclockwise. The mixing section of the long triangular rotor and the short triangular rotor are synchronously meshed in opposite directions within an opposite double-hole barrel, forming an opposite dual-shaft triangular rotor mixing unit. The phase difference between the long and short triangular rotors is 30°, and the distance between the rotation center axes of the long and short triangular rotors is equal to the radius of the arc of the triangular rotor body. The opposing triangular rotor body conveying sections are located inside opposing single-hole barrels, forming opposing single-axis triangular rotor conveying units.

9. The apparatus according to any one of claims 2-7, characterized in that, It includes one long triangular rotor and one short triangular rotor, which are co-directional long triangular rotor and co-directional short triangular rotor. The spiral directions of the co-directional long triangular rotor body and the co-directional short triangular rotor body are the same and have no phase difference. The co-directional long triangular rotor body mixing section and the co-directional short triangular rotor body are synchronously meshed in the co-directional double-hole barrel, forming a co-directional double-shaft triangular rotor mixing unit. The distance between the rotation center axis of the co-directional long triangular rotor and the rotation center axis of the co-directional short triangular rotor is equal to the radius of the arc of the triangular rotor body. The co-directional long triangular rotor body conveying section is in the co-directional single-hole barrel, forming a co-directional single-shaft triangular rotor conveying unit.

10. The apparatus according to any one of claims 2-7, characterized in that, It includes one long triangular rotor and two short triangular rotors, namely the left short triangular rotor, the middle long triangular rotor, and the right short triangular rotor. The spiral directions of the left short triangular rotor body, the middle long triangular rotor body, and the right short triangular rotor body are the same and have no phase difference. The mixing section of the left short triangular rotor body, the middle long triangular rotor body, and the right short triangular rotor body are meshed synchronously in the same direction in a straight line within a three-hole barrel, forming a three-axis triangular rotor mixing unit. The distance between the rotation center axis of the left short triangular rotor and the rotation center axis of the middle long triangular rotor is equal to the radius of the arc of the triangular rotor body, and the distance between the rotation center axis of the middle long triangular rotor and the rotation center axis of the right short triangular rotor is also equal to the radius of the arc of the triangular rotor body. The conveying section of the middle long triangular rotor body is located within the middle single-hole barrel, forming a middle single-axis triangular rotor conveying unit.

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