Feeding device for preparing nylon 6

Abstract

The utility model discloses a feeding device for preparing nylon 6, which comprises a crushing box arranged at a feeding port of a screw extruder, two symmetrical crushing rollers are horizontally and rotatably connected in the crushing box, a cleaning piece is movably connected outside each crushing roller, a case is horizontally fixed outside the crushing box, and the cleaning piece is movably connected outside the case. A driving part in transmission connection with the sweeping part is arranged in the machine box, the center of the bottom face of the crushing box is communicated with a material mixing bin, a material mixing part is arranged in the material mixing bin and connected with the sweeping part, the bottom face of the material mixing bin is vertically communicated with a material discharging valve, and the material discharging valve is communicated with a feeding opening of the screw extruder. The crushing rollers are arranged in the crushing box, and the bottom surface of the crushing box is communicated with the material mixing bin which is internally provided with the material mixing part, so that various materials are mixed together after being crushed when being fed into the screw extruder, and the materials are mixed more uniformly and fully by reducing the volume of the materials; and meanwhile, the melting and bonding efficiency of the materials in the screw extruder is also improved.

Description

Technical Field

[0001] The utility model relates to the technical field of nylon 6 preparation, in particular to a feeding device for nylon 6 preparation. Background Art

[0002] Nylon 6, also known as PA6, polyamide 6, nylon 6, is a polymer compound. The chemical and physical properties of nylon 6 are very similar to those of nylon 66. However, it has a lower melting point and a wide process temperature range. It has better impact resistance and solvent resistance than nylon 66 plastic, but it is also more hygroscopic. Because many quality characteristics of plastic parts are affected by hygroscopicity, this should be fully considered when designing products using nylon 6. In order to improve the mechanical properties of nylon 6, various modifiers are often added. Glass fiber is the most common additive, and sometimes synthetic rubbers such as EPDM and SBR are added to improve impact resistance. For products without additives, the shrinkage of nylon 6 plastic raw materials is between 1% and 1.5%. Adding glass fiber additives can reduce the shrinkage to 0.3% (but it is slightly higher in the direction perpendicular to the process). The shrinkage of molding assembly is mainly affected by the crystallinity and hygroscopicity of the material. The actual shrinkage is also a function of the plastic part design, wall thickness and other process parameters. Nylon 6 injection molding drying treatment Since nylon 6 easily absorbs moisture, special attention should be paid to drying before processing. If the material is supplied in waterproof packaging, the container should be kept airtight. If the humidity is greater than 0.2%, it is recommended to dry it in hot air above 80℃ for 16 hours. If the material has been exposed to air for more than 8 hours, it is recommended to perform vacuum drying at 105℃ for more than 8 hours.

[0003] When nylon 6 is produced, nylon resin and a certain amount of processed glass fiber or carbon fiber are heated and bonded in a ZSK twin-screw extruder, extruded through a die head and a die, cooled and shaped, pulled and pelletized, and packaged for storage and transportation. However, when feeding the extruder, the nylon resin and glass fiber are directly poured into it, which easily leads to the two materials being unable to be fully mixed after melting. Utility Model Content

[0004] The utility model aims to solve the shortcomings in the prior art and provides a feeding device for preparing nylon 6.

[0005] In order to achieve the above-mentioned purpose, the utility model adopts the following technical scheme: a feeding device for preparing nylon 6, comprising a crushing box arranged at the feeding port of a screw extruder, a supporting leg being vertically fixed on the bottom surface of the crushing box, the ends of the supporting legs being fixedly connected to a bottom plate, the bottom plate passing through a sleeve hole, the crushing box being connected to the screw extruder through the sleeve hole on the bottom plate and a bolt, the top surface of the crushing box passing through the feeding port, two symmetrical crushing rollers being horizontally rotatably connected in the crushing box, a cleaning piece being movably connected to the outside of each crushing roller, two mirror-symmetrical chassis being horizontally fixed on the outside of the crushing box, each of the chassis being provided with a driving piece, the two driving pieces being distributed and axially sliding through the two chassis, and being respectively connected to the two cleaning pieces in transmission, the bottom center of the crushing box being connected to a mixing bin, a mixing piece being provided in the mixing bin, the mixing piece being connected to the two cleaning pieces together, the bottom surface of the mixing bin being vertically connected to a discharge valve, and the discharge valve being connected to the feeding port of the screw extruder.

[0006] As a further description of the above technical solution: a gear is fixed to the end of each crushing roller, and the two gears are meshed with each other. A crushing motor is horizontally fixed to the outer wall of one side of the crushing box, and the output end of the crushing motor is transmission-connected to the end of one of the crushing rollers. The bottom surface of the crushing box is fixedly connected to two guide blocks whose inclined surfaces are inclined toward the middle of the crushing box. The center of the bottom surface of the crushing box passes through a through slot connected to the mixing bin, and the two guide blocks are respectively distributed on both sides of the through slot.

[0007] As a further description of the above technical solution: the mixing piece includes a plurality of arc-shaped bars horizontally arranged in the mixing bin, each of the arc-shaped bars is interconnected by a plurality of support rods, a plurality of stirring blocks distributed at equal distances are vertically fixed on the bottom surface of each of the arc-shaped bars, a connecting rod is vertically fixed on each of the two ends of the top surface of the arc-shaped bar located in the middle position, and the two connecting rods are respectively connected to two cleaning pieces.

[0008] As a further description of the above technical solution: the cleaning member includes a guide block axially slidably connected to the outside of the crushing roller, the side of the guide block passes through an arc groove, the guide block axially moves on the outer edge of the crushing roller through the arc groove, a brush is provided in the arc groove, the guide block is transmission-connected to the driving member, and the connecting rod is vertically fixed to the bottom surface of the guide block.

[0009] As a further description of the above technical solution: the driving member includes a driving motor horizontally fixed on the outside of the chassis, the output end of the driving motor is connected to a rotating shaft, the end of the rotating shaft rotates through the chassis and is rotatably connected in the chassis, the outer edge of the rotating shaft is fixedly sleeved with a cam, the outer edge of the cam fits a push plate, the push plate is slidably connected in the chassis, a guide rod is horizontally fixed on the side of the push plate, the outer edge of the guide rod is sleeved with a spring abutting between the push plate and the inner wall of the chassis, the end of the guide rod axially slides through the chassis and extends into the crushing box, and the end of the guide rod is horizontally fixed to the side of the guide block.

[0010] As a further description of the above technical solution: two mirror-symmetrical sliding grooves are horizontally opened in the chassis, a sliding block is slidably connected in each of the sliding grooves, and the two sliding blocks are respectively fixed on both sides of the push plate.

[0011] The utility model has the following beneficial effects:

[0012] Compared with the prior art, the feeding device for preparing nylon 6 has a crushing roller arranged in a crushing box, and the bottom surface of the crushing box is connected to a mixing bin with a mixing piece arranged therein, so that when feeding into the screw extruder, various materials are crushed and then mixed together, and the volume of the materials is reduced, so that the materials are mixed more evenly and fully, and the efficiency of melting and bonding of the materials in the screw extruder is also accelerated. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 This is a stereoscopic diagram of the overall structure of the feeding device for preparing nylon 6 proposed in the utility model;

[0014] Figure 2 This is a main cross-sectional view of the overall structure of the feeding device for preparing nylon 6 proposed in the utility model;

[0015] Figure 3 It is a side sectional view of the overall structure of the feeding device for preparing nylon 6 proposed in the utility model;

[0016] Figure 4 The utility model provides a feeding device for preparing nylon 6 Figure 2 A magnified view of the structure at center.

[0017] Legend:

[0018] 1. Crushing box; 2. Feed inlet; 3. Support legs; 4. Bottom plate; 5. Mixing bin; 6. Discharge valve; 7. Socket hole; 8. Crushing motor; 9. Gear; 10. Crushing roller; 11. Guide block; 12. Arc groove; 13. Brush; 14. Guide rod; 15. Chassis; 16. Cam; 17. Rotating shaft; 18. Push plate; 19. Guide block; 20. Through groove; 21. Arc strip; 22. Support rod; 23. Stirring block; 24. Connecting rod; 25. Slide; 26. Slider; 27. Spring. DETAILED DESCRIPTION

[0019] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0020] Reference Figures 1 to 4 The feeding device for preparing nylon 6 provided by the utility model comprises a crushing box 1 arranged at the feeding port of the screw extruder, a supporting leg 3 is vertically fixed to the bottom surface of the crushing box 1, the end of the supporting leg 3 is fixedly connected to the bottom plate 4, the bottom plate 4 passes through the sleeve hole 7, the crushing box 1 is connected to the screw extruder through the sleeve hole 7 on the bottom plate 4 and the bolt, the top surface of the crushing box 1 passes through the feeding port 2, two symmetrical crushing rollers 10 are horizontally rotatably connected in the crushing box 1, a gear 9 is fixed to the end of each crushing roller 10, and the two gears 9 are meshed with each other, a crushing motor 8 is horizontally fixed to the outer wall of one side of the crushing box 1, the output end of the crushing motor 8 is drivingly connected to the end of one of the crushing rollers 10, and each crushing roller 10 is movable on the outside The crushing box 1 is horizontally fixed with two mirror-symmetrical chassis 15 on the outside, each of which is provided with a driving member, and the two driving members are distributed and axially slide through the two chassis 15, and are respectively connected to the two cleaning members by transmission. The center of the bottom surface of the crushing box 1 is connected to the mixing bin 5, and the bottom surface of the crushing box 1 is fixedly connected with two guide blocks 19, both of which are inclined toward the middle of the crushing box 1. The center of the bottom surface of the crushing box 1 passes through a through groove 20 connected to the mixing bin 5, and the two guide blocks 19 are respectively distributed on both sides of the through groove 20. A mixing member is provided in the mixing bin 5, and the mixing member is connected with the two cleaning members. The bottom surface of the mixing bin 5 is vertically connected to the discharge valve 6, and the discharge valve 6 is connected to the feeding port of the screw extruder.

[0021] The mixing element comprises a plurality of arc-shaped bars 21 horizontally arranged in the mixing bin 5, each of which is connected to each other by a plurality of supporting rods 22, a plurality of stirring blocks 23 distributed at equal distances are vertically fixed to the bottom surface of each arc-shaped bar 21, a connecting rod 24 is vertically fixed to both ends of the top surface of the arc-shaped bar 21 located in the middle, and the two connecting rods 24 are respectively connected to the two cleaning elements; the cleaning element comprises a guide block 11 axially slidably connected to the outside of the crushing roller 10, the side surface of the guide block 11 passes through the arc-shaped groove 12, the guide block 11 axially moves on the outer edge of the crushing roller 10 through the arc-shaped groove 12, a brush 13 is arranged in the arc-shaped groove 12, the guide block 11 is transmission-connected to the driving element, and the connecting rod 24 is vertically fixed to the bottom surface of the guide block 11;

[0022] The driving member includes a driving motor horizontally fixed outside the chassis 15, and the output end of the driving motor is transmission-connected to the rotating shaft 17. The end of the rotating shaft 17 rotates through the chassis 15 and is rotatably connected in the chassis 15. The outer edge of the rotating shaft 17 is fixedly sleeved with the cam 16, and the outer edge of the cam 16 fits the push plate 18. The push plate 18 is slidably connected in the chassis 15. Two mirror-symmetrical slide grooves 25 are horizontally opened in the chassis 15, and a slider 26 is slidably connected in each slide groove 25. The two sliders 26 are respectively fixed on both sides of the push plate 18. A guide rod 14 is horizontally fixed on the side of the push plate 18. The outer edge of the guide rod 14 is sleeved with a spring 27 abutting between the push plate 18 and the inner wall of the chassis 15. The end of the guide rod 14 axially slides through the chassis 15 and extends into the crushing box 1. The end of the guide rod 14 is horizontally fixed to the side of the guide block 11.

[0023] By arranging a crushing roller 10 in the crushing box 1, and connecting a mixing bin 5 with a mixing element inside the crushing box 1 at the bottom surface, various materials are crushed and then mixed together when feeding into the screw extruder, and the volume of the materials is reduced, so that the materials are mixed more evenly and fully, and the efficiency of melting and bonding of the materials in the screw extruder is also accelerated;

[0024] Working principle: When in use, first, two materials with larger particle size are put into the crushing box 1 through the feed port 2, and the two crushing rollers 10 crush the materials to reduce the volume of the materials. The crushed materials will fall into the mixing bin 5, and then the driving member drives the guide block 11 to move axially back and forth, so that the brush 13 in the guide block 11 brushes off the material powder remaining on the crushing roller 10 and falls into the mixing bin 5 to reduce waste. While the guide block 11 moves axially back and forth, it drives the stirring block 23 through the connecting rod 24 to mix and stir the powdered materials in the mixing bin 5, so that the powders of the two materials are mixed more fully, and then the discharge valve 6 is opened. The fully mixed powders of the two materials will fall into the screw extruder through the discharge valve 6, be heated and melted, and bonded, and the bonded materials are extruded.

[0025] Finally, it should be noted that the above is only a preferred embodiment of the present invention and is not intended to limit the present invention. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art can still modify the technical solutions described in the aforementioned embodiments or make equivalent substitutions for some of the technical features therein. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A feeding device for preparing nylon 6, comprising a crushing box (1) arranged at a feeding port of a screw extruder, wherein a support leg (3) is vertically fixed to the bottom surface of the crushing box (1), and the end of the support leg (3) is fixedly connected to a bottom plate (4), wherein the bottom plate (4) passes through a sleeve hole (7), and the crushing box (1) is connected to the screw extruder through the sleeve hole (7) on the bottom plate (4) and bolts, characterized in that: The top surface of the crushing box (1) passes through the feed port (2); two symmetrical crushing rollers (10) are horizontally rotatably connected inside the crushing box (1); a cleaning piece is movably connected to the outside of each crushing roller (10); two mirror-symmetrical chassis (15) are horizontally fixed to the outside of the crushing box (1); each chassis (15) is provided with a driving piece; the two driving pieces are axially slidably distributed and pass through the two chassis (15) and are respectively connected to the two cleaning pieces in a transmission manner; the center of the bottom surface of the crushing box (1) is connected to the mixing bin (5); a mixing piece is provided inside the mixing bin (5); the mixing piece is connected to the two cleaning pieces; the bottom surface of the mixing bin (5) is vertically connected to a discharge valve (6); and the discharge valve (6) is connected to the feed port of the screw extruder.

2. The feeding device for preparing nylon 6 according to claim 1, characterized in that: A gear (9) is fixed to the end of each crushing roller (10), and the two gears (9) are meshed with each other. A crushing motor (8) is horizontally fixed to the outer wall of one side of the crushing box (1), and the output end of the crushing motor (8) is drivingly connected to the end of one of the crushing rollers (10). The bottom surface of the crushing box (1) is fixedly connected to two guide blocks (19) whose inclined surfaces are inclined toward the middle of the crushing box (1). The center of the bottom surface of the crushing box (1) passes through a through groove (20) connected to the mixing bin (5), and the two guide blocks (19) are respectively distributed on both sides of the through groove (20).

3. The feeding device for preparing nylon 6 according to claim 1, characterized in that: The mixing element comprises a plurality of arc-shaped bars (21) horizontally arranged in the mixing bin (5), each of the arc-shaped bars (21) being connected to each other via a plurality of support rods (22), a plurality of stirring blocks (23) distributed at equal distances being vertically fixed to the bottom surface of each of the arc-shaped bars (21), a connecting rod (24) being vertically fixed to each of the two ends of the top surface of the arc-shaped bar (21) located in the middle, and two of the connecting rods (24) being connected to two cleaning elements respectively.

4. The feeding device for preparing nylon 6 according to claim 3, characterized in that: The cleaning member comprises a guide block (11) axially slidably connected to the outside of the crushing roller (10), the side of the guide block (11) passes through an arc groove (12), the guide block (11) moves axially on the outer edge of the crushing roller (10) through the arc groove (12), a brush (13) is arranged in the arc groove (12), the guide block (11) is transmission-connected to the driving member, and the connecting rod (24) is vertically fixed to the bottom surface of the guide block (11).

5. The feeding device for preparing nylon 6 according to claim 4, characterized in that: The driving member comprises a driving motor horizontally fixed outside the chassis (15); the output end of the driving motor is connected to a rotating shaft (17); the end of the rotating shaft (17) rotates through the chassis (15) and is rotatably connected inside the chassis (15); the outer edge of the rotating shaft (17) is fixedly sleeved with a cam (16); the outer edge of the cam (16) is in contact with a push plate (18); the push plate (18) is slidably connected inside the chassis (15); a guide rod (14) is horizontally fixed on the side of the push plate (18); the outer edge of the guide rod (14) is sleeved with a spring (27) abutting between the push plate (18) and the inner wall of the chassis (15); the end of the guide rod (14) axially slides through the chassis (15) and extends into the crushing box (1); the end of the guide rod (14) is horizontally fixed to the side of the guide block (11).

6. The feeding device for preparing nylon 6 according to claim 5, characterized in that: Two mirror-symmetrical sliding grooves (25) are horizontally provided in the chassis (15), and a sliding block (26) is slidably connected in each of the sliding grooves (25). The two sliding blocks (26) are respectively fixed on two sides of the push plate (18).

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