Extrusion stirring device capable of uniformly mixing materials

Abstract

The invention relates to the technical field of extruders, and particularly discloses an extruding and stirring device capable of uniformly mixing materials, a plurality of plastic master batches with different particle sizes are put into a feeding hopper and pass through an inclined material guide channel above a guide plate, a plurality of round holes are formed in the guide plate, and the hole diameters of the round holes are gradually increased along the material guide direction of the material guide channel, so that the plastic master batches are uniformly mixed; therefore, the plastic master batches with small particle sizes directly fall into the first blending cavity through the round holes with small apertures, the plastic master batches with large particle sizes continuously roll along the material guide channel and then fall into the first blending cavity through the round holes with large apertures, and the round holes with larger apertures are farther away from the second blending cavity. Therefore, the melting time of the large-particle-size plastic master batches in the first blending cavity is prolonged, most of the plastic master batches with different particle sizes can enter the second blending cavity in a molten state and are fully mixed in the second blending cavity, and compared with a conventional direct feeding type structure, the mixing effect of the plastic master batches with different particle sizes can be improved.

Description

Technical Field

[0001] The invention relates to the technical field of extruders, in particular to an extrusion stirring device with uniform material mixing. Background Art

[0002] The extrusion stirring device is a device used for melt mixing to produce plastics. After mixing multiple plastic masterbatches, they are put into the blending chamber of the extruder. The mixture is molten by high temperature and sheared and mixed by a single screw or a twin screw to obtain a mixed molten material. It is best to inject it into the mold through the discharge port and obtain a plastic product after mold closing and cooling.

[0003] The extrusion stirring device of the prior art usually feeds the mixed plastic masterbatch directly into the feeding funnel, and the mixture is molten in the mixing chamber after high temperature. In actual production, since the sizes of the plastic masterbatch in the mixture are different, if the materials are fed directly, the plastic masterbatch with small particle size will melt quickly, while the masterbatch with large particle size will melt slowly, which is prone to uneven mixing.

[0004] Therefore, the prior art still needs to be improved and developed. Summary of the invention

[0005] In view of the above-mentioned deficiencies of the prior art, an object of the present invention is to provide an extrusion stirring device with uniform mixing, so as to solve the problem of uneven mixing of the extrusion stirring device in the prior art.

[0006] A uniformly mixed extrusion stirring device, comprising: A chassis, wherein a first mixing chamber and a second mixing chamber are sequentially arranged in the chassis along a feeding direction; A stirring mechanism, comprising a screw that rotates in the first blending cavity and the second blending cavity; The feeding mechanism comprises a feeding box which is arranged at the upper end of the first blending cavity and is connected to the first blending cavity at the bottom, a feeding funnel which is connected to the upper end of the feeding box and is arranged close to the second blending cavity, and a guide plate which is arranged in the feeding box, wherein the horizontal height of the guide plate at one end facing the second blending cavity is higher than the horizontal height at the other end, an inclined material guiding channel is formed above the guide plate, a plurality of circular holes are arranged on the guide plate, and the aperture of the circular holes gradually increases along the material guiding direction of the material guiding channel.

[0007] Specifically, the guide plate has a swinging portion facing one end of the second mixing chamber and a rotating portion away from one end of the second mixing chamber, the chassis is provided with a vibration motor for driving the swinging portion to swing up and down, and both ends of the rotating portion are rotatably connected to the chassis.

[0008] Specifically, a recovery channel is provided on one side of the material guiding channel along the material guiding direction, one end of the recovery channel extends out of the outside of the feed box, and a collection box is also provided on the outside of the chassis, and the collection box is located below the discharge port of the recovery channel.

[0009] Specifically, the material collection box is also provided with a baffle for controlling the opening and closing of the recovery channel.

[0010] Specifically, a feed control valve is provided between the feed hopper and the feed box.

[0011] Specifically, the feeding funnel is provided with a stirring device, which includes a first motor fixed to the top of the feeding funnel, a stirring shaft connected to the output end of the first motor and extending into the feeding funnel, and a cover that can be opened and closed is provided on the top of the feeding funnel.

[0012] Specifically, the interior of the feed box is a trapezoidal structure that is larger at the top and smaller at the bottom.

[0013] Specifically, the extrusion stirring device also includes a base, and the chassis is fixed on the base.

[0014] Specifically, the stirring mechanism also includes a driving device, which includes a bracket fixed on the base, a second motor fixed on the bracket, a driving wheel drivingly connected to the output shaft of the second motor, and a driven wheel meshing with the driving wheel, and the driven wheel is drivingly connected to the screw.

[0015] Specifically, an outlet is provided at the end of the second blending cavity along the feeding direction.

[0016] Beneficial effects of the present invention: The extrusion stirring device of the present invention puts plastic masterbatches of various sizes into a feed funnel, which are mixed in the feed funnel and then enter the inner side of a feed box, and then pass through an inclined material guide channel above a guide plate. Since a plurality of circular holes are provided on the guide plate, and the apertures of the circular holes gradually increase along the material guide direction of the material guide channel, plastic masterbatches with small particle sizes will directly fall into the first blending cavity through the circular holes with small apertures, and plastic masterbatches with large particle sizes will continue to roll along the material guide channel and then fall into the first blending cavity through the circular holes with large apertures. Moreover, the circular holes with larger apertures are farther away from the second blending cavity, thereby extending the melting time of plastic masterbatches with large particle sizes in the first blending cavity, so that most plastic masterbatches with different particle sizes can enter the second blending cavity in a molten state and be fully mixed in the second blending cavity. Compared with the conventional direct feeding structure, the mixing effect of plastic masterbatches with different particle sizes can be improved. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 A three-dimensional diagram of the extrusion stirring device of the present application; Figure 2 It is a three-dimensional cross-sectional schematic diagram of the extrusion stirring device of the present application; Figure 3 for Figure 2 A magnified view of part A; Figure 4 for Figure 2 A magnified view of part B; Figure 5 This is a schematic diagram of the structure of the guide plate of the present application.

[0018] The figures are marked as follows: chassis 10, first blending chamber 11, second blending chamber 12, stirring mechanism 20, screw 21, feeding mechanism 30, feeding box 31, feeding funnel 32, guide plate 33, material guiding channel 34, circular hole 35, swinging part 331, rotating part 332, vibration motor 36, recovery channel 37, collecting box 38, baffle 39, feed control valve 310, stirring device 40, first motor 41, stirring shaft 42, cover 43, base 50, driving device 22, bracket 221, second motor 222, driving wheel 223, driven wheel 224, outlet 13. DETAILED DESCRIPTION

[0019] The present invention provides an extrusion stirring device for uniform mixing. In order to make the purpose, technical solution and effect of the present invention clearer and more specific, the present invention is further described in detail with reference to the accompanying drawings and examples. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not used to limit the present invention.

[0020] In the description of the present invention, it should be understood that descriptions involving orientations, such as up, down, front, back, left, right, etc., and orientations or positional relationships indicated are based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present invention.

[0021] like Figures 1 to 5 As shown, this embodiment discloses an extrusion stirring device for uniform mixing, comprising: A chassis 10, wherein a first mixing chamber 11 and a second mixing chamber 12 are sequentially arranged in the chassis 10 along a feeding direction; The stirring mechanism 20 includes a screw 21 that rotates in the first mixing chamber 11 and the second mixing chamber 12; The feeding mechanism 30 includes a feeding box 31 which is arranged at the upper end of the first mixing chamber 11 and is connected to the first mixing chamber 11 at the bottom, a feeding funnel 32 which is connected to the upper end of the feeding box 31 and is arranged close to the second mixing chamber 12, and a guide plate 33 which is arranged in the feeding box 31. The horizontal height of the guide plate 33 at one end facing the second mixing chamber 12 is higher than that at the other end. An inclined material guiding channel 34 is formed above the guide plate 33. A plurality of circular holes 35 are provided on the guide plate 33. The aperture of the circular holes 35 gradually increases along the material guiding direction of the material guiding channel 34.

[0022] In the extrusion stirring device of this embodiment, during production, a plurality of plastic masterbatches of different particle sizes are put into the feed funnel 32, mixed in the feed funnel 32, and then enter the inner side of the feed box 31, and then pass through the inclined guide channel 34 above the guide plate 33. Since the guide plate 33 is provided with a plurality of circular holes 35, and the aperture of the circular holes 35 gradually increases along the guide direction of the guide channel 34, the plastic masterbatches with small particle sizes will directly fall into the first mixing chamber 11 through the circular holes 35 with small apertures, and the plastic masterbatches with large particle sizes will directly fall into the first mixing chamber 11 through the circular holes 35 with small apertures. The plastic masterbatch continues to roll along the material guide channel 34, and then falls into the first blending chamber 11 through the large-diameter circular hole 35. The larger the diameter of the circular hole 35, the farther away it is from the second blending chamber 12. Therefore, the melting time of the large-diameter plastic masterbatch in the first blending chamber 11 is prolonged, so that most of the plastic masterbatch of different particle sizes can enter the second blending chamber 12 in a molten state and be fully mixed in the second blending chamber 12. Compared with the conventional direct feeding structure, the mixing effect of the plastic masterbatch of different particle sizes can be improved.

[0023] Please refer to Figure 4 and Figure 5 The guide plate 33 of this embodiment has a swinging portion 331 facing one end of the second mixing chamber 12 and a rotating portion 332 away from one end of the second mixing chamber 12. The chassis 10 is provided with a vibration motor 36 for driving the swinging portion 331 to swing up and down. Both ends of the rotating portion 332 are rotatably connected to the chassis 10. By providing the vibration motor 36, the vibration motor 36 can drive the swinging portion 331 to swing up and down at a high frequency, which can prevent the plastic masterbatch from accumulating on the guide plate 33 and being unable to roll down smoothly, and can also prevent the plastic masterbatch from being stuck in the circular hole 35 and being unable to fall into the first mixing chamber 11.

[0024] In actual production, some plastic masterbatch does not fall into the first blending chamber 11 through the round hole 35 during its movement along the guide channel 34 due to reasons such as too large particle size or misalignment with the round hole. In order to collect this part of the plastic masterbatch, please refer to Figures 1 to 3In this embodiment, a recovery channel 37 is further provided on one side of the material guiding direction of the material guiding channel 34. One end of the recovery channel 37 extends out of the outside of the feed box 31. A collection box 38 is further provided on the outside of the chassis 10. The collection box 38 is located below the discharge port of the recovery channel 37. The plastic masterbatch that does not fall through the circular hole 35 will be transported to the collection box 38 through the recovery channel 37 for collection, and then re-fed or re-crushed and re-fed.

[0025] Please refer to Figure 1 and Figure 3 The collecting box 38 of this embodiment is also provided with a baffle 39 for controlling the on-off of the recycling channel 37. The upper end of the baffle 39 is rotatably connected to the collecting box 38, and the lower end of the baffle 39 is a swing end. When the recycling channel 37 does not transport the recycled plastic masterbatch, the swing end of the baffle 39 is against the recycling channel 37 to isolate the recycling channel 37, thereby preventing the heat in the first blending cavity 11 from escaping from the recycling channel 37, thereby forming a good thermal insulation effect; when the recycling channel 37 transports the recycled plastic masterbatch, the plastic masterbatch will push open the swing end of the baffle 39 when it rolls down the recycling channel 37, and then fall into the collecting box 38 for collection.

[0026] For further information, please refer to Figure 1 and Figure 4 A feed control valve 310 is provided between the feed hopper 32 and the feed box 31. By providing the feed control valve 310, the feed speed of the plastic masterbatch can be effectively controlled.

[0027] For further information, please refer to Figure 1 and Figure 2 A stirring device 40 is provided on the feeding funnel 32, and the stirring device 40 includes a first motor 41 fixed to the top of the feeding funnel 32, and a stirring shaft 42 connected to the output end of the first motor 41 and extending into the feeding funnel 32. A cover 43 that can be opened and closed is provided on the top of the feeding funnel 32. When feeding, the cover 43 can be opened, and a variety of plastic masterbatches of different materials and different particle sizes can be put into the feeding funnel 32, and then the first motor 41 is started, and the stirring shaft 42 is driven to rotate by the first motor 41. The plastic masterbatches in the feeding funnel 32 are stirred and mixed by the stirring shaft 42, and then the feeding control valve 310 is opened, and the plastic masterbatches of different materials and different particle sizes can be mixed once in the feeding funnel 32, thereby improving the mixing effect.

[0028] Furthermore, in order to better guide the plastic masterbatch into the first blending chamber 11, the interior of the feed box 31 is a trapezoidal structure with a larger top and a smaller bottom.

[0029] For further information, please refer to Figure 1 The extrusion stirring device also includes a base 50, and the chassis 10 is fixed on the base 50, having good structural stability.

[0030] In addition, since the screw 21 has a high temperature, in order to avoid the second motor 222 from being overheated by being directly connected to the screw 21, please refer to Figure 2 The stirring mechanism 20 also includes a driving device 22, which includes a bracket 221 fixed on the base 50, a second motor 222 fixed on the bracket 221, a driving wheel 223 drivingly connected to the output shaft of the second motor 222, and a driven wheel 224 meshing with the driving wheel 223, and the driven wheel 224 is drivingly connected to the screw 21. By arranging the driving wheel 223 and the driven wheel 224, it is possible to prevent the heat of the screw 21 from being directly transferred to the output shaft of the second motor 222, causing the second motor 222 to overheat.

[0031] Please refer to Figure 1 An outlet 13 is provided at the end of the second mixing cavity 12 along the feeding direction, and the molten plastic raw material after mixing is ejected from the outlet 13 into the mold for molding.

[0032] The preferred embodiments of the present invention are described in detail above, but the present invention is not limited to the embodiments. Those skilled in the art may make various equivalent modifications or substitutions without violating the spirit of the present invention. These equivalent modifications or substitutions are all included in the scope defined by the claims of the present invention.

Claims

1. An extrusion stirring device for uniform mixing, characterized in that: include: A machine case (10), wherein a first mixing chamber (11) and a second mixing chamber (12) are sequentially arranged in the machine case (10) along a feeding direction; A stirring mechanism (20) comprising a screw (21) that rotates in the first mixing chamber (11) and the second mixing chamber (12); The feeding mechanism (30) comprises a feeding box (31) arranged at the upper end of the first blending chamber (11) and the bottom of which is connected to the first blending chamber (11), a feeding funnel (32) connected to the upper end of the feeding box (31) and arranged close to the second blending chamber (12), and a guide plate (33) arranged in the feeding box (31), wherein the horizontal height of one end of the guide plate (33) facing the second blending chamber (12) is higher than the horizontal height of the other end, an inclined material guiding channel (34) is formed above the guide plate (33), and a plurality of circular holes (35) are provided on the guide plate (33), wherein the aperture of the circular holes (35) gradually increases along the material guiding direction of the material guiding channel (34).

2. The extrusion stirring device for uniform mixing according to claim 1, characterized in that: The guide plate (33) has a swinging portion (331) facing one end of the second mixing chamber (12) and a rotating portion (332) away from one end of the second mixing chamber (12); the chassis (10) is provided with a vibration motor (36) for driving the swinging portion (331) to swing up and down; and both ends of the rotating portion (332) are rotatably connected to the chassis (10).

3. The extrusion stirring device for uniform mixing according to claim 1, characterized in that: A recovery channel (37) is also provided on one side of the material guiding channel (34) along the material guiding direction, one end of the recovery channel (37) extends out of the outside of the feed box (31), and a collection box (38) is also provided on the outside of the machine box (10), and the collection box (38) is located below the discharge port of the recovery channel (37).

4. The extrusion stirring device for uniform mixing according to claim 3, characterized in that: The material collection box (38) is also provided with a baffle (39) for controlling the opening and closing of the recovery channel (37).

5. The extrusion stirring device for uniform mixing according to claim 1, characterized in that: A feed control valve (310) is provided between the feed hopper (32) and the feed box (31).

6. The extrusion stirring device for uniform mixing according to claim 1, characterized in that: The feeding funnel (32) is provided with a stirring device (40), the stirring device (40) comprising a first motor (41) fixed to the top of the feeding funnel (32), a stirring shaft (42) connected to the output end of the first motor (41) and extending into the feeding funnel (32), and a lid (43) that can be opened and closed is provided on the top of the feeding funnel (32).

7. The extrusion stirring device for uniform mixing according to claim 1, characterized in that: The interior of the feed box (31) is a trapezoidal structure that is larger at the top and smaller at the bottom.

8. The extrusion stirring device for uniform mixing according to claim 1, characterized in that: The extrusion stirring device further comprises a base (50), and the housing (10) is fixed on the base (50).

9. The extrusion stirring device for uniform mixing according to claim 8, characterized in that: The stirring mechanism (20) further comprises a driving device (22), the driving device (22) comprising a bracket (221) fixed on the base (50), a second motor (222) fixed on the bracket (221), a driving wheel (223) drivingly connected to an output shaft of the second motor (222), and a driven wheel (224) meshing with the driving wheel (223), the driven wheel (224) being drivingly connected to the screw rod (21).

10. The extrusion stirring device for uniform mixing according to claim 1, characterized in that: An outlet (13) is provided at the end of the second mixing chamber (12) along the feeding direction.

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