Double-screw extruder with mixing function for producing fiber-plastic composite material

Abstract

The invention discloses a double-screw extruder with a mixing function for fiber-plastic composite material production, and relates to the technical field of fiber-plastic composite material production, the double-screw extruder comprises a base, two screws, an extrusion shell and a mixing cylinder, and further comprises a stirring shaft penetrating into the mixing cylinder through a motor; according to the double-screw extruder with the mixing function for producing the fiber-plastic composite material, after the fiber-plastic composite material enters the mixing cylinder body, a motor drives the stirring shaft and a mixing plate to rotate, so that the fiber-plastic composite material is uniformly mixed with the mixing plate; an electric push rod can drive a mixing plate to move up and down while rotating through a connecting assembly, materials are uniformly stirred, stirring dead angles are reduced, compatibility is better, and under driving of a gear adjusting assembly, the angle of the mixing plate can be adjusted, so that the mixing efficiency of the materials is further improved, and the practicability is high. The mixing of the high-viscosity fiber-plastic composite material is facilitated, and the subsequent product quality is improved.

Description

Technical Field

[0001] The invention relates to the technical field of fiber-plastic composite material production, in particular to a twin-screw extruder with a mixing function for producing fiber-plastic composite materials. Background Art

[0002] The twin-screw extruder consists of two parallel screws that rotate on the same axis and mesh with each other. Through the rotation of the screws, the raw materials are fully mixed, heated and extruded in the barrel to form a continuous product. It is a kind of equipment widely used in plastics, rubber, food and other industries. Due to its good feeding performance, mixing and plasticizing performance, exhaust performance, extrusion stability and other characteristics, it has been widely used in the molding processing of extruded products.

[0003] Reference patent application number 202223491778.6 is a twin-screw extruder with a mixing function. The mixing box of the prior art is arranged directly above the main body of the twin-screw extruder. The mixing box is fixed to the support plate through a support seat arranged on the outer wall. The support plate is fixed directly above the workbench through a column. It has the advantages of simple structure, easy manufacturing, practicality and high efficiency. However, the patent has the following shortcomings:

[0004] The materials in the above patent enter into a mixing box for stirring, but the stirring structure is a fixed stirring shaft and stirring blades, which are prone to stirring dead angles, resulting in uneven mixing between different materials, poor compatibility, and difficulty in removing generated bubbles, affecting the quality of subsequent products. At the same time, the screw structure of the twin-screw extruder is difficult to disassemble in sections, and when local wear is severe or damaged, the entire structure needs to be replaced, increasing the cost of use. Summary of the invention

[0005] In view of the deficiencies in the prior art, the present invention provides a twin-screw extruder with a mixing function for producing a fiber-plastic composite material, which solves the problems in the above-mentioned background technology.

[0006] To achieve the above objectives, the present invention is implemented through the following technical solutions: A twin-screw extruder with mixing function for producing fiber-plastic composite materials, comprising a base, two screws, an extrusion shell and a mixing barrel, and also comprising:

[0007] The stirring shaft penetrates into the interior of the mixing cylinder through the motor;

[0008] A stirring mechanism, sleeved on the surface of the stirring shaft, for stirring the fiber-plastic composite material, the stirring mechanism comprising a sleeve, a gear adjustment assembly and a plurality of mixing plates;

[0009] A vertical driving mechanism is arranged above the stirring mechanism and is used to drive the stirring mechanism to move up and down while rotating. The vertical driving mechanism includes a first electric push rod and a connecting assembly that are slidably arranged on the top of the mixing cylinder through an annular slide rail;

[0010] The locking assembly is arranged on the surface of the screw and is used for assembling the screw in sections.

[0011] Preferably, the gear adjustment assembly includes a fixed shell, the inner wall of the fixed shell is rotatably provided with a plurality of fixed shafts, and the surfaces of the fixed shafts are fixedly connected with gears, the bottom of the inner wall of the fixed shell is fixedly connected with a second electric push rod, the rear side of the inner wall of the fixed shell is slidably provided with a tooth plate, and a movable groove is opened at the bottom of the tooth plate, and the output end of the second electric push rod is fixedly connected to the top of the inner wall of the movable groove.

[0012] Preferably, a spur is fixedly connected to the bottom of the mixing plate, two support rods are fixedly connected to one side of the stirring shaft, and a scraper is fixedly connected to one side of the support rod.

[0013] Preferably, the connecting assembly includes a vertical plate fixedly connected to the top of the sleeve, a slide groove is provided on the surface of the stirring shaft, a connecting plate is fixedly connected to one side of the vertical plate extending to the outside of the mixing cylinder, and the output end of the first electric push rod is fixedly connected to the connecting plate.

[0014] Preferably, the mixing cylinder comprises an outer cylinder and an inner cylinder, an interlayer is arranged between the outer cylinder and the inner cylinder, an electric heating coil is arranged inside the interlayer, and a heating tube is fixedly arranged inside the mixing plate.

[0015] Preferably, the screw rod is composed of a plurality of rod bodies, and each two of the rod bodies are fixed by a locking assembly, and the locking assembly includes an upper arc plate and a lower arc plate, and a groove is formed on the surface of the opposite ends of each two rod bodies, and the inner sides of the upper arc plate and the lower arc plate are fixedly connected with a clamping rod adapted to the groove, and the upper arc plate and the lower arc plate are threadedly connected by a bolt, and one end of the bolt extending to the outside of the lower arc plate is threadedly connected with a nut, and an anti-loosening gasket is provided on the surface of the bolt.

[0016] Preferably, a plurality of panels are provided on both the front and rear sides of the extruded shell through screw threads.

[0017] Preferably, the bottom of the mixing cylinder is connected to a discharge box, electric telescopic rods are provided on the front and rear sides of the discharge box, sealing plates are rotatably provided on the front and rear sides of the inner wall of the discharge box, and the bottom of the sealing plate is fixedly connected to a track, the output end of the electric telescopic rod is rotatably connected to a slider, and the slider is slidably provided at the bottom of the track, and a heating wire is provided inside the sealing plate.

[0018] Preferably, a driving motor is fixedly connected to one side of the top of the base, and a reducer is provided at the output end of the driving motor, and the output end of the reducer is connected to one end of the two screw rods.

[0019] Preferably, the top of the mixing cylinder is connected to a feeding channel, and a material level measuring and controlling device is provided on one side of the mixing cylinder.

[0020] The present invention provides a twin-screw extruder with mixing function for producing fiber-plastic composite materials. It has the following beneficial effects:

[0021] (1) The fiber-plastic composite material is produced using a twin-screw extruder with a mixing function. After the fiber-plastic composite material enters the mixing cylinder, the motor drives the stirring shaft and the mixing plate to rotate. The first electric push rod can drive the mixing plate to move up and down while rotating through the connecting component, so as to evenly stir the materials, reduce the mixing dead angle, and improve the compatibility. Driven by the gear adjustment component, the mixing plate can adjust the angle, further improving the mixing efficiency of the materials, and is more conducive to mixing the fiber-plastic composite material with higher viscosity, thereby improving the quality of subsequent products.

[0022] (2) The twin-screw extruder with mixing function used in the production of the fiber-plastic composite material can be disassembled in sections on the front and rear panels of the extrusion shell. When the screw at the corresponding position is damaged, the screw at that position can be disassembled and replaced separately, thereby reducing the cost of use, being simple and quick to operate, reducing work difficulty, and improving work efficiency.

[0023] (3) The twin-screw extruder with mixing function used in the production of the fiber-plastic composite material drives two sealing plates to open and close through an electric telescopic rod, and the opening size is adjustable, which is convenient for controlling the speed and amount of material discharge while avoiding blockage and preventing equipment overload, thereby improving the uniformity and quality of the finished product. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 It is a schematic diagram of the structure of the present invention;

[0025] Figure 2 It is a cross-sectional view of the mixing cylinder structure of the present invention;

[0026] Figure 3 For the present invention Figure 1 A partial enlarged view of the middle A;

[0027] Figure 4 It is a schematic diagram of the gear adjustment assembly structure of the present invention;

[0028] Figure 5 It is a cross-sectional view of the tooth plate structure of the present invention;

[0029] Figure 6 is a cross-sectional view of the hybrid plate structure of the present invention;

[0030] Figure 7 It is a side sectional view of the discharge box structure of the present invention;

[0031] Figure 8 It is a schematic diagram of the screw structure of the present invention;

[0032] Fig. 9 This is a disassembled diagram of the locking assembly structure of the present invention.

[0033] In the figure: 1, base; 2, screw; 201, rod body; 3, extrusion shell; 4, mixing cylinder; 41, outer cylinder; 42, inner cylinder; 5, stirring shaft; 6, motor; 7, stirring mechanism; 71, sleeve; 72, gear adjustment assembly; 721, fixed shell; 722, fixed shaft; 723, gear; 724, second electric push rod; 725, tooth plate; 726, movable groove; 73, mixing plate; 8, vertical drive mechanism; 81, annular slide rail; 82, first electric push rod; 83, connecting assembly; 831, vertical Plate; 832, slide groove; 833, connecting plate; 9, spur; 10, support rod; 11, scraper; 12, interlayer; 13, electric heating coil; 14, upper arc plate; 15, lower arc plate; 16, slot; 17, clamping rod; 18, bolt; 19, nut; 20, anti-loosening gasket; 21, panel; 22, discharge box; 23, electric telescopic rod; 24, sealing plate; 25, slider; 26, heating wire; 27, drive motor; 28, reducer; 29, feed channel; 30, material level measurement and control device; 31, heating tube. DETAILED DESCRIPTION

[0034] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0035] Embodiment 1

[0036] See also Figures 1 to 6As shown, the present invention provides a twin-screw extruder with mixing function for producing fiber-plastic composite materials, including a base 1, two screws 2, an extrusion shell 3 and a mixing cylinder 4, a driving motor 27 is fixedly connected to one side of the top of the base 1, and a reducer 28 is provided at the output end of the driving motor 27, and the output end of the reducer 28 is connected to one end of the two screws 2, a feeding channel 29 is connected to the top of the mixing cylinder 4, and a material level measurement and control device 30 is provided on one side of the mixing cylinder 4, when the material level measurement and control device 30 reaches a specified high position, the external feeding conveyor automatically stops feeding to the feeding channel 29; when it reaches a specified low position, the conveyor automatically starts conveying, and also includes:

[0037] The stirring shaft 5 has a bottom end that penetrates into the interior of the mixing cylinder 4. The top of the mixing cylinder 4 is fixedly connected to a motor 6 via a bracket, and the output end of the motor 6 is fixedly connected to the top of the stirring shaft 5.

[0038] A stirring mechanism 7 is sleeved on the surface of the stirring shaft 5 and is used to stir the fiber-plastic composite material. The stirring mechanism 7 includes a sleeve 71 sleeved on the surface of the stirring shaft 5, a gear adjustment assembly 72 and a plurality of mixing plates 73;

[0039] A vertical driving mechanism 8 is arranged above the stirring mechanism 7 and is used to drive the stirring mechanism 7 to move up and down while rotating. The vertical driving mechanism 8 includes a first electric push rod 82 and a connecting assembly 83 which are slidably arranged on the top of the mixing cylinder 4 through an annular slide rail 81;

[0040] The connecting assembly 83 includes a vertical plate 831 fixedly connected to the top of the sleeve 71, a slide groove 832 is provided on the surface of the stirring shaft 5, the top of the vertical plate 831 is slidably connected to the inner wall of the slide groove 832, and a connecting plate 833 is fixedly connected to one side of the vertical plate 831 extending to the outside of the mixing cylinder 4, and the output end of the first electric push rod 82 is fixedly connected to the connecting plate 833;

[0041] A locking assembly, arranged on the surface of the screw rod 2, for assembling the screw rod 2 in sections;

[0042] The bottom of the mixing plate 73 is fixedly connected with a thorn 9, and the thorn 9 is provided with multiple thorns. As the mixing plate 73 moves, the bubbles in the material can be fully removed. One side of the stirring shaft 5 is fixedly connected with two support rods 10, and one side of the support rod 10 is fixedly connected with a scraper 11. The scraper 11 rotates with the stirring shaft 5 to prevent the material from adhering to the inner wall, avoiding waste, facilitating subsequent cleaning, and not affecting the heat conduction of the electric heating coil 13 in the interlayer 12;

[0043] The mixing cylinder 4 includes an outer cylinder 41 and an inner cylinder 42, an interlayer 12 is provided between the outer cylinder 41 and the inner cylinder 42, and an electric heating coil 13 is provided inside the interlayer 12, and a heating tube 31 is fixedly provided inside the mixing plate 73 to improve the heating efficiency;

[0044] Through the arrangement of the above structure, the motor 6 drives the stirring shaft 5 and the mixing plate 73 to rotate, and the first electric push rod 82 can drive the mixing plate 73 to move up and down while rotating through the connecting component 83, so as to facilitate uniform stirring of the materials, reduce the stirring dead angle, and improve the compatibility.

[0045] Embodiment 2

[0046] Based on Example 1, please refer to Figure 2 , Figure 4 and Figure 5 As shown, the specific improvements are as follows: the gear adjustment assembly 72 includes a fixed shell 721 fixed on the surface of the sleeve 71, the inner wall of the fixed shell 721 is rotatably provided with a plurality of fixed shafts 722, and the surface of the fixed shaft 722 is fixedly connected with a gear 723, the bottom of the inner wall of the fixed shell 721 is fixedly connected with a second electric push rod 724, the rear side of the inner wall of the fixed shell 721 is slidably provided with a tooth plate 725, and the bottom of the tooth plate 725 is provided with a movable groove 726, the output end of the second electric push rod 724 is fixedly connected to the top of the inner wall of the movable groove 726, and one end of the fixed shaft 722 extending to the outside of the fixed shell 721 is fixedly connected to one side of the mixing plate 73;

[0047] Through the arrangement of the above structure, the second electric push rod 724 drives the multiple gears 723 to rotate back and forth through the tooth plate 725, thereby driving the mixing plate 73 to adjust the angle through the fixed shaft 722, improving fluidity, further improving the mixing efficiency of the materials, and helping to improve the molding quality of the product.

[0048] Embodiment 3

[0049] In conjunction with Example 1 and Example 2, please refer to Figure 1 , Figure 8 and Fig. 9 As shown, the specific improvements are as follows: the screw rod 2 is composed of a plurality of rod bodies 201, and each two rod bodies 201 are fixed by a locking assembly, and the locking assembly is located at the connection between each two rod bodies 201, and the locking assembly includes an upper arc plate 14 and a lower arc plate 15, and each of the upper and lower sides of the opposite end of each two rod bodies 201 is provided with a card slot 16, and the inner sides of the upper arc plate 14 and the lower arc plate 15 are fixedly connected with a card rod 17 adapted to the card slot 16, and the upper arc plate 14 and the lower arc plate 15 are threadedly connected by a bolt 18, and one end of the bolt 18 extending to the outside of the lower arc plate 15 is threadedly connected with a nut 19, and a locking gasket 20 is sleeved on the surface of the bolt 18 and between the nut 19 and the lower arc plate 15 to improve the stability of the connection of the nut 19, and a plurality of panels 21 are provided on the front and rear sides of the extrusion shell 3 through screw threads;

[0050] Through the arrangement of the above-mentioned structure, the panels 21 before and after the extrusion shell 3 can be disassembled in sections. By separating the upper arc plate 14 from the lower arc plate 15, the clamping rod 17 is moved out of the clamping groove 16 at the connection point, and the two rod bodies 201 can be disassembled, and the damaged rod body 201 can be disassembled and replaced separately, which reduces the workload, alleviates the work difficulty, and improves the replacement efficiency.

[0051] Embodiment 4

[0052] In conjunction with Embodiments 1 to 3, please refer to Figure 1 and Figure 7 As shown, the specific improvements are as follows: the bottom of the mixing cylinder 4 is connected to a discharge box 22, the discharge box 22 is connected to the top of the extrusion shell 3, the front and rear sides of the discharge box 22 are provided with electric telescopic rods 23, the front and rear sides of the inner wall of the discharge box 22 are rotatably provided with sealing plates 24, the bottoms of the two sealing plates 24 are movably connected, and the bottoms of the sealing plates 24 are provided with sliders 25 through track sliding, the output end of the electric telescopic rod 23 is rotatably connected to one side of the slider 25, and the inside of the sealing plate 24 is provided with a heating wire 26 to prevent the material from solidifying and sticking to the sealing plate 24;

[0053] Through the arrangement of the above structure, the electric telescopic rod 23 drives the two sealing plates 24 to open and close, and the opening size is adjustable, which is convenient for controlling the speed and amount of material discharge, avoiding blockage, preventing equipment overload, and improving the uniformity and quality of the finished product.

[0054] Meanwhile, the contents not described in detail in this specification belong to the prior art known to those skilled in the art, and the model parameters of each electrical appliance are not specifically limited, and conventional equipment compatible with the equipment can be used.

[0055] When in use, the conveyor conveys the material to the mixing cylinder 4, starts the motor 6, drives the stirring shaft 5 to rotate, and under the cooperation of the connecting component 83, the stirring shaft 5 drives the mixing plate 73 to rotate through the sleeve 71 to stir the fiber-plastic composite material, and the first electric push rod 82 is on the annular slide rail 81, rotates with the stirring shaft 5, and at the same time starts the first electric push rod 82 to drive the vertical plate 831 to move up and down, and the vertical plate 831 drives the sleeve 71 and the mixing plate 73 to move up and down while rotating, so as to fully stir the material and reduce the stirring dead angle. During the stirring process, the second electric push rod 724 is started to drive the tooth plate 72 5 moves up and down, and the tooth plate 725 drives multiple gears 723 to rotate in the same direction, thereby driving multiple mixing plates 73 to adjust their angles through the fixed shaft 722, improving fluidity and further improving the mixing efficiency of the materials. When the mixing plates are adjusted, the spurs at the bottom are conducive to fully removing the bubbles generated in the materials. While mixing, the electric heating coil 13 in the interlayer 12 cooperates with the heating tube 31 in the mixing plate 73 to heat the internal materials. When the stirring shaft 5 rotates, the scraper 11 rotates accordingly to prevent the materials from adhering to the inner wall, avoiding waste, and not affecting the heat conduction of the electric heating coil 13 in the interlayer 12.

[0056] After the fiber-plastic composite material is mixed, the two electric telescopic rods 23 are started to drive the two sealing plates 24 to open. The slider 25 slides on the track and rotates with the electric telescopic rod 23, so that the opening size between the two sealing plates 24 can be adjusted to control the speed and amount of the fiber-plastic composite material when it is discharged;

[0057] The fiber-plastic composite material is fed into the extrusion shell 3, and the driving motor 27 drives the twin screws 2 to rotate through the reducer 28 to transport and extrude the material. When the screw 2 is damaged at a local position during use, the front and rear panels 21 corresponding to the damaged position are disassembled, and then the nut 19 is screwed out of the bolt 18, and the anti-loosening gasket 20 is taken out, so that the upper arc plate 14 and the lower arc plate 15 can be separated, so that the clamping rod 17 is moved out of the clamping groove 16 at the connection, and the two rod bodies 201 are separated, and the damaged rod body 201 can be disassembled and replaced separately, which reduces the workload and improves the replacement efficiency.

[0058] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A twin-screw extruder with mixing function for producing fiber-plastic composite materials, comprising a base (1), two screws (2), an extrusion shell (3) and a mixing barrel (4), characterized in that: Also includes: A stirring shaft (5) penetrates into the interior of the mixing cylinder (4) through a motor (6); A stirring mechanism (7) is sleeved on the surface of the stirring shaft (5) and is used to stir the fiber-plastic composite material. The stirring mechanism (7) comprises a sleeve (71), a gear adjustment assembly (72) and a plurality of mixing plates (73); A vertical driving mechanism (8) is arranged above the stirring mechanism (7) and is used to drive the stirring mechanism (7) to move up and down while rotating, and the vertical driving mechanism (8) comprises a first electric push rod (82) and a connecting assembly (83) which are slidably arranged on the top of the mixing cylinder (4) via an annular slide rail (81); The locking assembly is arranged on the surface of the screw rod (2) and is used for assembling the screw rod (2) in sections.

2. The twin-screw extruder with mixing function for producing fiber-plastic composite materials according to claim 1, characterized in that: The gear adjustment assembly (72) comprises a fixed shell (721), the inner wall of which is rotatably provided with a plurality of fixed shafts (722), and the surfaces of the fixed shafts (722) are fixedly connected with gears (723), the bottom of the inner wall of the fixed shell (721) is fixedly connected with a second electric push rod (724), the rear side of the inner wall of the fixed shell (721) is slidably provided with a tooth plate (725), and the bottom of the tooth plate (725) is provided with a movable groove (726), and the output end of the second electric push rod (724) is fixedly connected with the top of the inner wall of the movable groove (726).

3. The twin-screw extruder with mixing function for producing fiber-plastic composite materials according to claim 1, characterized in that: The bottom of the mixing plate (73) is fixedly connected with a thorn (9), one side of the stirring shaft (5) is fixedly connected with two support rods (10), and one side of the support rod (10) is fixedly connected with a scraper (11).

4. The twin-screw extruder with mixing function for producing fiber-plastic composite materials according to claim 1, characterized in that: The connecting assembly (83) comprises a vertical plate (831) fixedly connected to the top of the sleeve (71); a sliding groove (832) is provided on the surface of the stirring shaft (5); a connecting plate (833) is fixedly connected to one side of the vertical plate (831) extending to the outside of the mixing cylinder (4); and an output end of the first electric push rod (82) is fixedly connected to the connecting plate (833).

5. The twin-screw extruder with mixing function for producing fiber-plastic composite materials according to claim 1, characterized in that: The mixing cylinder (4) comprises an outer cylinder (41) and an inner cylinder (42), an interlayer (12) is provided between the outer cylinder (41) and the inner cylinder (42), an electric heating coil (13) is provided inside the interlayer (12), and a heating tube (31) is fixedly provided inside the mixing plate (73).

6. The twin-screw extruder with mixing function for producing fiber-plastic composite materials according to claim 1, characterized in that: The screw rod (2) is composed of a plurality of rod bodies (201), and each two of the rod bodies (201) are fixed together by a locking assembly. The locking assembly comprises an upper arc plate (14) and a lower arc plate (15). A clamping groove (16) is provided on the surface of one opposite end of each of the two rod bodies (201). The inner sides of the upper arc plate (14) and the lower arc plate (15) are fixedly connected with a clamping rod (17) matched with the clamping groove (16). The upper arc plate (14) and the lower arc plate (15) are threadedly connected by a bolt (18). One end of the bolt (18) extending to the outside of the lower arc plate (15) is threadedly connected with a nut (19), and a locking gasket (20) is sleeved on the surface of the bolt (18).

7. The twin-screw extruder with mixing function for producing fiber-plastic composite materials according to claim 1, characterized in that: A plurality of panels (21) are provided on both the front and rear sides of the extruded shell (3) via screw threads.

8. The twin-screw extruder with mixing function for producing fiber-plastic composite materials according to claim 1, characterized in that: The bottom of the mixing cylinder (4) is connected to a discharge box (22), and electric telescopic rods (23) are arranged on both the front and rear sides of the discharge box (22). Sealing plates (24) are rotatably arranged on both the front and rear sides of the inner wall of the discharge box (22), and a slider (25) is slidably arranged at the bottom of the sealing plate (24) via a track, the output end of the electric telescopic rod (23) is rotatably connected to one side of the slider (25), and a heating wire (26) is arranged inside the sealing plate (24).

9. The twin-screw extruder with mixing function for producing fiber-plastic composite materials according to claim 1, characterized in that: A driving motor (27) is fixedly connected to one side of the top of the base (1), and a reducer (28) is provided at the output end of the driving motor (27), and the output end of the reducer (28) is connected to one end of the two screw rods (2).

10. The twin-screw extruder with mixing function for producing fiber-plastic composite materials according to claim 1, characterized in that: The top of the mixing cylinder (4) is connected to a feed channel (29), and a material level measurement and control device (30) is provided on one side of the mixing cylinder (4).

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