A composite equipment for producing bearing bush raw material

Abstract

The application discloses a kind of composite equipment for bearing bush raw material production, it is related to plastic processing production technical field, to solve the technical problem that current equipment is easily plasticized not repeated, fiber is easily dispersed uneven, arrangement is disorderly, leading to the mechanical properties of fiber composite material are influenced, including double-screw extrusion component.The application is by the design of double-screw extrusion component, first melting section preliminary melting treatment, so that raw material forms molten state base material;Fiber mixing treatment section adds fiber, realizes the uniform dispersion and preliminary mixing of fiber;Second melting section secondary melting, improve material homogeneity, while guiding and combing fiber arrangement direction by directional shape-retention part.The application is by segmented processing design, ensure that material is fully plasticized by twice melting, guarantee that fiber is uniformly dispersed by special mixing structure, fiber reinforcing effect is optimized by directional arrangement, the mechanical properties of significantly improved strength, toughness of composite material.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of plastic processing production, more particularly, to a composite equipment for bearing bush raw material production. BACKGROUND

[0002] As the core wear-resistant component of mechanical transmission system, the raw material of bearing bush needs to meet high strength, high toughness and excellent fatigue resistance at the same time, in order to adapt to the continuous friction and load impact in the bearing rotation process. With the upgrading of lightweight and long life demand, fiber reinforced plastics have gradually replaced traditional metal materials as the mainstream choice. By mixing glass fiber, carbon fiber and other reinforcing phases in polyolefin, nylon and other matrix, the tensile strength of the material can be improved, and the thermal stability can be improved. The processing quality of such composite materials directly determines the service life of the bearing bush.

[0003] However, the existing bearing bush raw material production equipment often melts the fiber composite material at a time to plasticize it, which can easily cause insufficient plasticization, and the fiber in the fiber composite material is often mixed during the melting process, which can easily cause uneven dispersion and chaotic arrangement of the fiber, which can affect the strengthening effect of the fiber and the mechanical properties of the fiber composite material. In view of this, we propose a composite equipment for bearing bush raw material production. SUMMARY

[0004] The present application aims to overcome the shortcomings of the prior art, adapt to the needs of reality, and provide a composite equipment for bearing bush raw material production, to solve the technical problem that the current equipment is prone to plasticization, the fiber is prone to uneven dispersion and chaotic arrangement, and the mechanical properties of the fiber composite material are affected.

[0005] To solve the above technical problems, the present application provides the following technical scheme: a composite equipment for bearing bush raw material production, comprising a double-screw extrusion assembly;

[0006] The double-screw extrusion assembly comprises a first melting section, a fiber mixing treatment section and a second melting section; the first melting section comprises a first channel and two first extrusion screws, the two first extrusion screws are respectively arranged on the inside of the two sides of the first channel, the tail end of the first extrusion screw is provided with a melting kneading part, and the first extrusion screw and the melting kneading part are used for cooperating to perform the first melting treatment of the raw material;

[0007] The fiber mixing treatment section comprises a second channel and a fiber feeding component; the head end of the second channel is communicated with the tail end of the first channel, and the fiber feeding component is communicated with the head end of the second channel; two fiber mixing structures are arranged on the two sides of the interior of the second channel, and the fiber mixing structures are in transmission connection with the first extrusion screw; the fiber mixing structures are used for mixing the fibers added into the second channel with the raw materials;

[0008] The second melting section comprises a third channel and a second extrusion screw; the head end of the third channel is communicated with the tail end of the second channel, and the second extrusion screw is arranged in the middle part of the interior of the third channel; the head end of the second extrusion screw is provided with a directional shaping part; the second extrusion screw and the directional shaping part are used for cooperating to perform the second melting treatment of the fiber and raw material mixture, and guide and arrange the arrangement direction of the fiber and raw material mixture while completing the melting.

[0009] Preferably, the double-screw extrusion assembly comprises an extruder body, a first driving component and a second driving component;

[0010] The first driving component and the second driving component are respectively arranged at the two ends of the extruder body; the two output ends of the first driving component are connected with the two first extrusion screws, and the output end of the second driving component is connected with the second extrusion screw.

[0011] Preferably, the fiber mixing structure comprises a middle mixing part, an edge mixing part and a third extrusion screw;

[0012] The middle mixing parts and the edge mixing parts are equidistantly arranged on the third extrusion screw, and the middle mixing parts and the edge mixing parts are arranged alternately;

[0013] The middle mixing parts on the two sides are used for cooperating to mix the fibers and the raw materials passing through the middle part of the second channel; and the edge mixing parts on the two sides are used for cooperating with the inner wall of the second channel to mix the fibers and the raw materials passing through the two edges of the second channel.

[0014] Preferably, the fiber mixing treatment section further comprises a middle baffle and an edge baffle;

[0015] The middle baffles are respectively arranged at one end of the edge mixing parts, the edge baffles are respectively arranged at one end of the middle mixing parts, and the middle baffles and the edge baffles are close to the head end of the second channel;

[0016] The middle baffles are used for blocking and guiding the fibers and the raw materials passing through the middle part to the two edges of the second channel, and the edge baffles are used for blocking and guiding the fibers and the raw materials passing through the edges to the middle part of the second channel.

[0017] Preferably, the middle mixing part comprises a middle mixing tooth disc, main teeth and auxiliary teeth.

[0018] The main teeth and the auxiliary teeth are arranged in a fishbone staggered tooth disc, and the main teeth and the auxiliary teeth are arranged in opposite directions.

[0019] Preferably, the edge mixing part comprises an edge mixing tooth disc and arc teeth.

[0020] The arc teeth are arranged in opposite directions.

[0021] Preferably, a plurality of groups of pressure relief grooves are arranged on the inner walls of the second channel in the axial direction, and the pressure relief grooves in each group are arranged in the axial direction in a ring shape.

[0022] Preferably, the pressure relief grooves are in a conical cylinder structure.

[0023] Preferably, the second channel is provided with a plurality of backflow grooves on the inner walls of the two sides.

[0024] Preferably, the inner wall of the third channel is provided with a plurality of pressure increasing rings.

[0025] Compared with the prior art, the present application has the following advantages:

[0026] 1. The application is characterized in that the three-section collaborative design of the double-screw extrusion assembly, the first melting section preliminarily melts the raw materials to form a uniform molten base material, laying a stable matrix for subsequent fiber mixing; the fiber mixing section adds fibers to achieve uniform dispersion and preliminary mixing of the fibers in the molten base material, avoiding fiber agglomeration or uneven distribution; the second melting section melts the fiber and raw material mixture again to further improve material homogeneity, and guides and combs the fiber arrangement direction through the directional shaping part to make the fibers orderly distributed along the predetermined direction. The application prolongs the mixing time of the material, increases the shearing frequency, and effectively solves the problem of insufficient dispersion of the material along the fixed track during the mixing of the traditional single-tooth disc.

[0027] 2. The application is characterized in that the fiber mixing structure and the baffle are collaboratively designed, the middle mixing part focuses on processing the fibers and raw materials in the middle of the second channel, and the uniform dispersion in the core area is achieved through meshing shearing; the edge mixing part is attached to the inner wall of the second channel, and the edge area material is intensively mixed to avoid insufficient mixing of the edge material due to slow flow; the middle baffle and the edge baffle of the fiber mixing section are combined to build a material circulation and flow system, the middle baffle blocks and guides the material flowing through the middle of the channel to the two sides, and the problem of insufficient material flow in the edge area is solved; the edge baffle guides the edge material to the middle to form a material convection between the middle and the edge. The application is characterized in that the mixing part is designed to process and the baffle is designed to forcibly flow, so that the material forms a reciprocating flow in the channel, which not only allows the fibers to fully contact the molten raw materials in the whole range, but also breaks the fiber agglomeration through the continuous shearing of the staggered mixing part, ensuring that each fiber is uniformly dispersed in the matrix.

[0028] 3. The application is characterized in that the middle mixing part is designed with a fishbone-type staggered disc, the main teeth and the auxiliary teeth are opposite in inclination direction, can form a bidirectional shearing force on the material, break the fiber agglomerates, and at the same time push the material to flow along the radial direction of the disc; the height difference between the main teeth and the auxiliary teeth can cover the material layers of different depths in the middle of the channel, avoiding the mixing dead angle of deep layer materials caused by single tooth height, and ensuring that all materials are stirred; the two groups of middle mixing teeth are stacked along the axial direction and rotated by 30°-120°, so that the tooth positions of the front and rear teeth are staggered, and the material flowing through will be sheared and turned over by the front and rear teeth multiple times, forming a mixing path of multi-directional shearing and reciprocating turning. The application prolongs the mixing time of the material, increases the shearing frequency, and effectively solves the problem of insufficient dispersion of the material along the fixed track during the mixing of the traditional single-tooth disc.

[0029] 4. This invention, through the design of an edge mixing section, a pressure relief groove, and a corrugated baffle, allows the edge mixing toothed disc of the edge mixing section to closely adhere to the inner wall of the second channel. This avoids material residue or equipment wear caused by the scraping of the inner wall of the channel by traditional rigid toothed components, and also completely covers the edge area, fully agitating the fibers and raw materials that are easily trapped at the edge of the channel, preventing dead zones from forming due to slow flow speed and insufficient mixing of edge materials. At the same time, the conical pressure relief groove can specifically relieve the local pressure generated during the edge mixing process. When the edge mixing toothed disc shears the material, the material is prone to pressure accumulation at the gap between the toothed disc and the inner wall. The conical structure can guide the pressure to be released along the groove through the gradual space, avoiding excessive pressure that could lead to turbulent material flow or fiber breakage. The corrugated baffle in the pressure relief groove can disrupt the material flow trajectory during pressure release, causing the fibers and raw materials to form turbulent mixing, further breaking down any possible small fiber agglomerates and preventing material stratification during pressure relief. The design of the edge mixing section, pressure relief groove, and corrugated baffle in this invention ensures that the material from the center to the edge in the second channel can be uniformly mixed, maintaining the stability of the material flow. This provides a homogenized premixed matrix for the subsequent directional combing and secondary melting of the fibers in the second melting section, effectively improving the consistency of the mechanical properties of the final composite material.

[0030] 5. This invention utilizes a spiral counterflow groove design on the inner walls of both sides of the second channel. When the second extrusion screw pushes the material to flow in the conveying direction, the reverse spiral counterflow groove creates reverse resistance on some of the material, causing localized counterflow or eddies. This prolongs the material's residence time in the second channel, increasing its contact opportunities with the fibers. Simultaneously, the counterflow material and the forward-conveyed material form a turbulent state of mutual impact and shearing, further breaking down fiber agglomerates and allowing the fibers to be more evenly dispersed in the raw materials. This invention, through the design of forward conveying and reverse counterflow, synergizes with the active mixing action of the central and edge mixing sections, enhancing the thoroughness of mixing from the flow path. This avoids the problem of incomplete mixing caused by the material rapidly passing through the channel, providing a more homogeneous mixing matrix for the subsequent directional processing in the second melting section.

[0031] 6、The present application is through the third channel inner wall equidistantly arranged supercharging ring and the embedding design of directional styling part, the inside of supercharging ring embeds the tooth of directional styling part, and the embedding depth is controlled between 1 / 3-2 / 3 of the radial thickness of tooth, this depth is reduced local channel space by the embedding of ring and tooth, forms stepped supercharging, promotes the melting pressure to promote material to fully plasticize, also retains enough flow gap to avoid excessive obstruction, simultaneously, embedding structure makes the tooth of directional styling part form tooth ring meshing guidance with supercharging ring when rotating, forces material to flow along the rotation direction of tooth, further carding fiber arrangement direction, reduces disorder deviation, the present application is through the design of supercharging and melting embedding strong orientation, ensures that mixture realizes homogenization after secondary melting, and makes fiber along the predetermined direction neat arrangement, provides structural guarantee for the mechanical properties of final product. BRIEF DESCRIPTION OF DRAWINGS

[0032] Figure 1 It is the structural schematic diagram of the present application;

[0033] Figure 2 It is the structural schematic diagram of the first melting section, fiber mixing treatment section and second melting section of the present application;

[0034] Figure 3 It is the structural schematic diagram of the first melting section of the present application;

[0035] Figure 4 It is the structural schematic diagram of the fiber mixing treatment section of the present application;

[0036] Figure 5 It is the structural schematic diagram of the second melting section of the present application;

[0037] Figure 6 It is the sectional structural schematic diagram of the first melting section of the present application;

[0038] Figure 7 It is the sectional structural schematic diagram of the fiber mixing treatment section of the present application;

[0039] Figure 8 It is the sectional structural schematic diagram of the second melting section of the present application;

[0040] Figure 9 It is the structural schematic diagram of the first extrusion screw of the present application;

[0041] Figure 10 It is the structural schematic diagram of the fiber mixing structure of the present application;

[0042] Figure 11 It is the structural schematic diagram of the middle mixing part of the present application;

[0043] Figure 12 It is the structural schematic diagram of the edge mixing part of the present application;

[0044] Figure 13 Structure diagram of the second extrusion screw of the present application;

[0045] Figure 14 Structure diagram of the second channel of the present application;

[0046] Figure 15 Structure diagram of the third channel of the present application.

[0047] Explanation of the figure:

[0048] 1, double-screw extrusion assembly; 2, first melting section; 3, fiber mixing treatment section; 4, second melting section; 5, fiber mixing structure;

[0049] 101, extruder main body; 102, first driving part; 103, second driving part;

[0050] 201, first channel; 202, first extrusion screw; 203, melting kneading part;

[0051] 301, second channel; 302, fiber feeding part; 303, middle baffle; 304, edge baffle;

[0052] 3011, pressure relief groove; 3012, spoiler; 3013, backflow groove;

[0053] 401, third channel; 402, second extrusion screw; 403, directional shaping part; 404, booster ring;

[0054] 501, middle mixing part; 502, edge mixing part; 503, third extrusion screw;

[0055] 5011, middle mixing tooth disc; 5012, main tooth; 5013, auxiliary tooth;

[0056] 5021, edge mixing tooth disc; 5022, arc tooth. DETAILED DESCRIPTION

[0057] As shown in the embodiment, the present application relates to a kind of composite equipment for bearing bush raw material production, including double-screw extrusion assembly 1. Figures 1 to 8

[0058] ​The double-screw extrusion assembly 1 comprises a first melting section 2, a fiber mixing processing section 3 and a second melting section 4; the first melting section 2 comprises a first channel 201 and two first extrusion screws 202, the two first extrusion screws 202 are respectively arranged at the two sides of the inside of the first channel 201, the tail end of the first extrusion screw 202 is provided with a melting kneading part 203, and the first extrusion screw 202 and the melting kneading part 203 are used for cooperating to perform the first melting processing of the raw materials; the fiber mixing processing section 3 comprises a second channel 301 and a fiber feeding component 302; the head end of the second channel 301 is communicated with the tail end of the first channel 201, the fiber feeding component 302 is communicated with the head end of the second channel 301, two fiber mixing structures 5 are arranged at the two sides of the inside of the second channel 301, and the fiber mixing structure 5 is in transmission connection with the first extrusion screw 202, and the fiber mixing structure 5 is used for mixing the fibers added into the second channel 301 with the raw materials; the second melting section 4 comprises a third channel 401 and a second extrusion screw 402; the head end of the third channel 401 is communicated with the tail end of the second channel 301, the second extrusion screw 402 is arranged at the middle part of the inside of the third channel 401, the head end of the second extrusion screw 402 is provided with a directional shaping part 403, and the second extrusion screw 402 and the directional shaping part 403 are used for cooperating to perform the second melting processing of the fiber and raw material mixture, and at the same time of completing the melting, the arrangement direction of the fiber and raw material mixture is guided and combed and arranged.

[0059] The double-screw extrusion assembly 1 comprises an extruder body 101, a first driving component 102 and a second driving component 103; the first driving component 102 and the second driving component 103 are respectively installed at the two ends of the extruder body 101, the two output ends of the first driving component 102 are connected on the two first extrusion screws 202, and the output end of the second driving component 103 is connected on the second extrusion screw 402.

[0060] The application realizes the uniform dispersion and preliminary mixing of the fibers in the molten base material by the two-side fiber mixing structure 5 driven and connected with the first extrusion screw 202, avoids the fiber agglomeration or uneven distribution, and realizes the second melting of the fiber and raw material mixture by the second extrusion screw 402 and the head directional shaping part 403 in the third channel 401, further improves the material homogeneity, and guides and combs the fiber arrangement direction by the directional shaping part 403, so that the fibers are orderly distributed along the predetermined direction. The application realizes the segmented processing design, ensures the sufficient plasticization of the material by twice melting, guarantees the uniform dispersion of the fibers by the special mixing structure, optimizes the fiber reinforcement effect by the directional arrangement, and significantly improves the mechanical properties of the strength and toughness of the composite material.

[0061] Specifically, as shown in the figure, Figures 7 to 10 The fiber mixing structure 5 includes the middle mixing part 501, the edge mixing part 502 and the third extrusion screw 503.

[0062] The three middle mixing parts 501 and the three edge mixing parts 502 are equidistantly installed on the third extrusion screw 503, and the middle mixing part 501 and the edge mixing part 502 are staggered; the two-side middle mixing part 501 is used for mixing the fibers and raw materials passing through the middle of the second channel 301; and the two-side edge mixing part 502 is used for mixing the fibers and raw materials passing through the two edges of the second channel 301.

[0063] The fiber mixing processing section 3 further includes the middle baffle 303 and the edge baffle 304; the three middle baffles 303 are respectively installed at one end of the three edge mixing parts 502, the three edge baffles 304 are respectively installed at one end of the three middle mixing parts 501, and the three middle baffles 303 and the three edge baffles 304 are close to the head end of the second channel 301; the middle baffle 303 is used for blocking and guiding the fibers and raw materials passing through the middle to the two edges of the second channel 301, and the edge baffle 304 is used for blocking and guiding the fibers and raw materials passing through the edge to the middle of the second channel 301.

[0064] The application is characterized in that the fiber mixing structure 5 is cooperated with the baffle, the three middle mixing parts 501 and the three edge mixing parts 502 arranged alternately on the third extrusion screw 503 form a complementary mixing mechanism, the middle mixing part 501 is used for processing the fibers and raw materials in the middle of the second channel 301, and the uniform dispersion of the core area is realized through the meshing shearing; the edge mixing part 502 is attached to the inner wall of the second channel 301, and the edge area material is subjected to intensive mixing, so that the mixing deficiency of the edge material caused by slow flow is avoided; the middle baffle 303 and the edge baffle 304 of the fiber mixing treatment section 3 are cooperated to construct a material circulation and flow guiding system, the middle baffle 303 blocks and guides the materials flowing through the middle of the channel to the two sides, so as to make up for the problem of insufficient material flow in the edge area; the edge baffle 304 guides the edge material to the middle, and forms the material convection of the middle and the edge. Through the design of the targeted treatment of the mixing part and the forced flow guiding of the baffle, the materials form a reciprocating circulation flow in the channel, the fibers are fully contacted with the molten raw materials in the whole range, the fiber aggregation is broken through the continuous shearing of the staggered mixing part, and it is ensured that each fiber can be uniformly dispersed in the matrix. The design lays a uniform foundation for the subsequent directional arrangement of the second melting section 4, avoids the mechanical property fluctuation of the material caused by local fiber concentration or sparseness, and significantly improves the overall strength and stability of the composite material.

[0065] It is worth mentioning that, as shown in Figure 11 The middle mixing part 501 includes a middle mixing tooth disc 5011, a main tooth 5012 and a secondary tooth 5013.

[0066] The six main teeth 5012 and the secondary teeth 5013 are equally spaced annularly mounted on the side edges of the middle mixing tooth disc 5011, and the six secondary teeth 5013 are respectively located in the tooth grooves of the six main teeth 5012. The middle mixing tooth disc 5011, the six main teeth 5012 and the six secondary teeth 5013 form a fishbone type staggered tooth disc, the six main teeth 5012 and the six secondary teeth 5013 are obliquely arranged, and the oblique directions of the main tooth 5012 and the secondary tooth 5013 are opposite, the height ratio of the main tooth 5012 to the secondary tooth 5013 is 3:1, and the two middle mixing tooth discs 5011 are stacked into a group along the axial direction, and the middle mixing tooth discs 5011 in the group are rotated by greater than or equal to 30° and less than or equal to 120° along the axial direction.

[0067] The tooth disc structure of the middle mixing part 501 is designed, the middle mixing part 501 takes a fishbone type staggered tooth disc as a core, six main teeth 5012 and six auxiliary teeth 5013 are annularly and equidistantly distributed on the side of the middle mixing tooth disc 5011, the auxiliary teeth 5013 are embedded into the tooth grooves of the main teeth 5012, and the inclination directions of the auxiliary teeth 5013 and the main teeth 5012 are opposite, and the height ratio is 3:1, the opposite inclination directions can form bidirectional shearing force on the material, break the fiber agglomerates, and simultaneously push the material to flow along the radial direction of the tooth disc; the height difference between the main teeth 5012 and the auxiliary teeth 5013 can cover the material layers of different depths in the middle of the channel, avoid the mixing dead angle of the deep layer material caused by the single tooth height, and ensure that the whole material is stirred; the two groups of middle mixing tooth discs 5011 are stacked along the axial direction and rotated by 30°-120°, so that the tooth positions of the front and rear tooth discs are staggered, the material flowing through the tooth discs is sheared and turned over by the front and rear tooth discs multiple times, and a mixing path of multidirectional shearing and reciprocating turning is formed. The tooth disc structure design of the middle mixing part 501 prolongs the material mixing time, increases the shearing frequency, and effectively solves the problem that the material flows along a fixed track and is not fully dispersed when mixed by a traditional single tooth disc.

[0068] Further, as shown in Figure 12 The edge mixing part 502 includes an edge mixing tooth disc 5021 and an arc tooth 5022.

[0069] The six arc teeth 5022 are equidistantly and annularly arranged on the side of the edge mixing tooth disc 5021, and the head end of the arc tooth 5022 is provided as an arc surface structure, and the arc tooth 5022 is matched with the inner wall of the second channel 301.

[0070] Six groups of pressure relief grooves 3011 are equidistantly arranged on the inner walls of the two sides of the second channel 301 along the axial direction, and the six pressure relief grooves 3011 in each group are equidistantly and annularly arranged along the axial direction, and the six groups of pressure relief grooves 3011 are located at the six edge mixing tooth discs 5021, and the pressure relief grooves 3011 are in a conical cylinder structure.

[0071] A spoiler 3012 is arranged in the pressure relief groove 3011, and the spoiler 3012 is in a wave shape structure.

[0072] The edge mixing part 502, the pressure relief groove 3011 and the wave-shaped spoiler 3012 are designed, six equidistant annular distribution arc teeth 5022 on the edge mixing tooth disc 5021 of the edge mixing part 502 adopt a head end arc surface structure, and can closely fit the inner wall of the second channel 301, so that the material residues or equipment wear caused by the traditional rigid tooth scraping the inner wall of the channel can be avoided, and the edge region can be completely covered, the rotation shearing of the arc teeth 5022 can fully stir the fibers and the raw materials which are prone to be retained at the edge of the channel, so that the dead angle area caused by the slow flow speed and the insufficient mixing of the edge material is prevented; meanwhile, the tapered cylinder-shaped pressure relief groove 3011 arranged at the positions corresponding to the six edge mixing tooth discs 5021 on the inner wall of the second channel 301 can be used for specifically dredging the local pressure generated in the edge mixing process, when the edge mixing tooth disc 5021 shears the material, the material is prone to form pressure accumulation at the gap between the tooth disc and the inner wall, the tapered cylinder structure can guide the pressure to be released along the groove body through the gradual space, so that the material flow disorder or fiber breakage caused by excessive pressure can be avoided; and the wave-shaped spoiler 3022 in the pressure relief groove 3011 can disrupt the material flow trajectory during the pressure release process, so that the fibers and the raw materials form turbulent mixing, the possible small fiber agglomerates are further broken, and the material layering during pressure dredging is avoided. The design of the edge mixing part 502, the pressure relief groove 3011 and the wave-shaped spoiler 3012 ensures that the materials in the second channel 301 can be uniformly mixed from the center to the edge, the stability of the material flow is maintained, a homogenized premixed substrate is provided for the subsequent directional combing and secondary melting of the fibers in the second melting section 4, and the mechanical property consistency of the final composite material is effectively improved.

[0073] Further, as shown in Figure 14 The second channel 301 has six reverse flow grooves 3013 arranged on the inner walls of the two sides, the reverse flow grooves 3013 have a spiral structure, and the thread rotation direction of the spiral structure is opposite to the conveying direction of the second extrusion screw 402.

[0074] The second channel 301 has six reverse flow grooves 3013 arranged on the inner walls of the two sides, the reverse flow grooves 3013 have a spiral structure, and the thread rotation direction of the spiral structure is opposite to the conveying direction of the second extrusion screw 402.

[0075] Further, as shown in Figures 8 to 15 The inner wall of the third channel 401 is provided with three booster rings 404 at equal intervals, the inner side of the booster rings 404 is embedded in the teeth of the directional shaping part 403, and the embedding depth is between 1 / 3 and 2 / 3 of the radial thickness of the teeth of the directional shaping part 403.

[0076] The embedding of the inner side of the booster rings 404 in the teeth of the directional shaping part 403 and the control of the embedding depth to be greater than or equal to 1 / 3 and less than or equal to 2 / 3 of the radial thickness of the teeth not only narrows the local channel space through the embedding of the rings and the teeth to form stepped boosting and improve the melting pressure to promote the full plasticization of the material, but also retains sufficient flow gap to avoid excessive obstruction; at the same time, the embedded structure makes the teeth of the directional shaping part 403 form a tooth ring meshing guide with the booster rings 404 when rotating, forcing the material to flow along the rotating direction of the teeth, further combing the fiber arrangement direction and reducing disordered deviation. The design of the present application promotes melting through boosting and embedding to ensure that the mixture is homogenized after secondary melting and the fibers are arranged in the predetermined direction, providing structural protection for the mechanical properties of the final product.

[0077] The embodiments of the present application are preferred embodiments, but are not limited thereto, and those skilled in the art can easily understand the spirit of the present application according to the above embodiments and make different inferences and changes, as long as they do not deviate from the spirit of the present application, which are within the protection scope of the present application.

Claims

1. A composite equipment for the production of bearing bush raw material, characterized in that, The utility model relates to a double screw extrusion assembly (1) for the first time melt processing of raw materials, and a fiber mixing structure (5) is arranged in the second channel (301) of the double screw extrusion assembly (1) to mix the fibers added into the second channel (301) with the raw materials. The utility model relates to a double screw extrusion assembly (1) for the second time melt processing of the fiber and raw material mixture, and a directional shaping part (403) is arranged at the head end of the second extrusion screw (402) to guide and comb the arrangement direction of the fiber and raw material mixture while completing the melt. The utility model relates to a double screw extrusion assembly (1) including an extruder main body (101), a first driving part (102) and a second driving part (103). The first driving part (102) and the second driving part (103) are respectively installed at both ends of the extruder main body (101), two output ends of the first driving part (102) are connected to the two first extrusion screws (202), and an output end of the second driving part (103) is connected to the second extrusion screw (402). The utility model relates to a fiber mixing structure (5) including a middle mixing part (501), an edge mixing part (502) and a third extrusion screw (503).

2. A composite equipment for producing a bearing bush raw material according to claim 1, characterized in that, A plurality of middle mixing parts (501) and a plurality of edge mixing parts (502) are equally spaced on the third extrusion screw (503), and the middle mixing parts (501) and the edge mixing parts (502) are arranged alternately. ​ 3. A composite equipment for producing a bearing bush raw material according to claim 1, characterized in that, ​ ​ The middle mixing part (501) on both sides is used for mixing the fibers and raw materials passing through the middle of the second channel (301); and the edge mixing part (502) on both sides is used for mixing the fibers and raw materials passing through the edges of the second channel (301) in cooperation with the inner wall of the second channel (301).

4. A composite equipment for producing a bearing bush raw material according to claim 3, characterized in that, The fiber mixing treatment section (3) further comprises middle baffles (303) and edge baffles (304). The middle baffles (303) are respectively installed at one end of the edge mixing parts (502), the edge baffles (304) are respectively installed at one end of the middle mixing parts (501), and the middle baffles (303) and the edge baffles (304) are close to the head end of the second channel (301). The middle baffles (303) are used for blocking the fibers and raw materials passing through the middle and guiding them to the edges of the second channel (301), and the edge baffles (304) are used for blocking the fibers and raw materials passing through the edges and guiding them to the middle of the second channel (301).

5. A composite equipment for producing a bearing bush raw material according to claim 3, characterized in that, The middle mixing part (501) comprises a middle mixing gear disc (5011), main teeth (5012) and auxiliary teeth (5013). The main teeth (5012) and the auxiliary teeth (5013) are equidistantly annularly installed at the side edges of the middle mixing gear disc (5011), the auxiliary teeth (5013) are respectively located at the tooth grooves of the main teeth (5012), the middle mixing gear disc (5011), the main teeth (5012) and the auxiliary teeth (5013) form a fishbone-type staggered gear disc, the main teeth (5012) and the auxiliary teeth (5013) are obliquely arranged, the oblique directions of the main teeth (5012) and the auxiliary teeth (5013) are opposite, the height ratio of the main teeth (5012) to the auxiliary teeth (5013) is 3:1, the middle mixing gear discs (5011) are axially stacked into a group, and the middle mixing gear discs (5011) in the group are axially rotated by greater than or equal to 30° and less than or equal to 120°.

6. A composite apparatus for producing a bearing bushing raw material according to claim 3, wherein The edge mixing part (502) comprises an edge mixing gear disc (5021) and arc teeth (5022). The arc teeth (5022) are equidistantly annularly installed at the side edges of the edge mixing gear disc (5021), the head end of the arc teeth (5022) is provided as an arc surface structure, and the arc teeth (5022) are matched with the inner wall of the second channel (301).

7. A composite plant for the production of bearing bush raw material according to claim 6, characterized in that, A plurality of groups of pressure relief grooves (3011) are equidistantly formed on the inner walls of the second channel (301) along the axial direction, the pressure relief grooves (3011) in each group are equidistantly annularly arranged along the axial direction, and the pressure relief grooves (3011) in the groups are respectively located at the edge mixing gear discs (5021), and the pressure relief grooves (3011) are conical cylinder structures.

8. A composite plant for the production of bearing bush raw material according to claim 7, characterized in that, The pressure relief grooves (3011) are provided with spoiler plates (3012) installed therein, and the spoiler plates (3012) are wave-shaped structures.

9. A composite equipment for producing a bearing bush raw material according to claim 1, characterized in that, A plurality of reflux grooves (3013) are arranged on the inner walls of the two sides of the second channel (301), the reflux grooves (3013) are in a spiral structure, and the spiral direction of the spiral structure is opposite to the conveying direction of the second extrusion screw (402).

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