Material mixing machine and material mixing system

Abstract

The utility model provides a material mixing machine and a material mixing system. The mixer comprises a support, a mixing bin connected to the support, a first stirring mechanism arranged on the support and used for stirring materials in the mixing bin, and a second stirring mechanism installed on the mixing bin, a feeding port is formed in the upper end of the mixing bin, a discharging port is formed in the lower end of the mixing bin, and the first stirring mechanism and the second stirring mechanism are arranged on the support. The second stirring mechanism comprises a first driving source mounted on the side wall of the mixing bin through a mounting seat, a fly cutter shaft extending into the mixing bin is arranged at the power output end of the first driving source, and a fly cutter is mounted on the fly cutter shaft. The second stirring mechanism is additionally arranged and is combined with the first stirring mechanism for use, after carbon fiber aggregates are preliminarily scattered by the first stirring mechanism, the carbon fiber aggregates are finely dispersed by the second stirring mechanism, the trend of re-aggregation of the aggregates is broken through, and uniform and sufficient mixing of graphite, resin and short carbon fibers is realized.

Description

Technical Field

[0001] The utility model relates to the technical field of dry mixing technology, in particular to a mixer and a mixing system. Background Art

[0002] In the dry mixing process of graphite, resin and chopped carbon fibers, on the one hand, it is necessary to ensure that the graphite and resin powders are fully mixed, and on the other hand, it is necessary to ensure that the chopped carbon fibers are fully opened and evenly dispersed in the graphite resin powder.

[0003] Existing mixers generally only have a single-stage stirring mechanism, which makes it difficult to achieve uniform mixing of graphite, resin and chopped carbon fibers. Utility Model Content

[0004] The purpose of the utility model is to provide a mixer and a mixing system, which can achieve uniform mixing of graphite, resin and chopped carbon fibers.

[0005] The technical solution of the present utility model is: a mixer, including a support, a mixing bin connected to the support, a first stirring mechanism provided on the support and used to stir the material inside the mixing bin, and a second stirring mechanism installed on the mixing bin, the upper end of the mixing bin is provided with a feed port, the lower end of the mixing bin is provided with a discharge port, the second stirring mechanism includes a first driving source installed on the side wall of the mixing bin through a mounting base, the power output end of the first driving source is provided with a flying knife shaft extending into the interior of the mixing bin, and a flying knife is installed on the flying knife shaft.

[0006] Preferably, the second stirring mechanism is arranged on the side and lower part of the mixing bin.

[0007] Preferably, two second stirring mechanisms are provided symmetrically in the width direction Y of the mixing bin, and at least one second stirring mechanism is provided in the length direction X of the mixing bin.

[0008] Preferably, the mixing bin includes an outer shell connected to a support and a machine cover provided on the outer shell, the feed port is provided on the machine cover, and the discharge port is provided at the bottom of the outer shell.

[0009] Preferably, an inner lining is provided on the inner surface of the shell, and a jacket is provided on the outside of the shell.

[0010] Preferably, the outer shell is provided with a thermocouple for measuring the temperature in the mixing bin and is in communication with the interior of the mixing bin; and the jacket is provided with a thermocouple for measuring the temperature in the jacket.

[0011] Preferably, a second valve is provided at the discharge port.

[0012] Preferably, the first stirring mechanism includes a main shaft rotating on the support, a spiral belt rotating along the axial direction of the main shaft, and a second driving source installed on the support, the second driving source is connected to the main shaft, and the spiral belt is located in the mixing bin.

[0013] Preferably, the spiral belt is provided with blades extending radially along the main axis.

[0014] The utility model also provides a mixing system, including a feeding port, a material barrel, a screw feeder and the above-mentioned mixer, the feeding port is connected to the feeding port of the mixer through a first valve and a first hose respectively, the discharge port of the mixer is connected to the screw feeder through a second valve and a second hose respectively, and the screw feeder is connected to the material barrel through a third hose.

[0015] Compared with the related art, the beneficial effects of the present invention are:

[0016] 1. The utility model adds a second stirring mechanism, which is used in combination with the first stirring mechanism. After the carbon fiber agglomerates are initially broken up by the first stirring mechanism, they are finely dispersed by the second stirring mechanism and the tendency of the agglomerates to re-aggregate is broken, thereby achieving uniform and sufficient mixing of graphite, resin and chopped carbon fibers.

[0017] Second, the first stirring mechanism of the utility model adopts low-shear, high-dispersion efficiency spiral ribbons and blades, which can fully break up and mix the graphite powder agglomerates and resin powders, and also distribute the carbon fibers;

[0018] 3. The utility model sets an inner lining inside the shell to prevent the material from sticking to the wall and friction heat accumulation. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 A schematic diagram of the structure of the mixer provided by the present invention in a perspective front view and partially cutaway;

[0020] Figure 2 A schematic side perspective structural diagram of the mixer provided by the utility model;

[0021] Figure 3 A schematic diagram of the top view of the mixer provided by the utility model;

[0022] Figure 4 This is a structural diagram of the mixing system provided by the utility model.

[0023] In the accompanying drawings: 1. feeding port; 2. first valve; 3. first hose; 4. mixer; 41. support; 42. outer shell; 43. machine cover; 44. feeding port; 45. exhaust port; 46. discharge port; 47. second valve; 48. main shaft; 49. paddle; 410. spiral ribbon; 411. second driving source; 412. lining; 413. jacket; 414. flying knife; 415. flying knife shaft; 416. first driving source; 417. thermocouple for measuring temperature in the silo; 418. thermocouple for measuring temperature in the jacket; 419. first stirring mechanism; 420. second stirring mechanism; 421. mixing silo; 422. mounting base; 6. second hose; 7. screw feeder; 8. third hose; 9. weighing platform; 10. barrel; 11. control cabinet; 12. display. DETAILED DESCRIPTION

[0024] The present invention will be described in detail below with reference to the accompanying drawings and in conjunction with the embodiments. It should be noted that the embodiments and features of the embodiments of the present invention may be combined unless they conflict. For ease of description, the words "upper," "lower," "left," and "right" appear below merely to indicate the directions of upper, lower, left, and right in the accompanying drawings and do not limit the structure.

[0025] like Figure 1 、 Figure 2 、 Figure 3 As shown, a mixer 4 provided in this embodiment includes a support 41 , a mixing bin 421 , a first stirring mechanism 419 and a second stirring mechanism 420 .

[0026] The two supports 41 are spaced apart in the X direction. The mixing bin 421 is connected between the two supports 41. The mixing bin 421 includes a housing 42 and a cover 43 covering the housing 42.

[0027] The housing 42 is a U-shaped structure, forming a circular arc transition without dead angles, and its inner surface is provided with an inner lining 412, which is mirror-polished to prevent material from sticking to the wall, frictional heat accumulation, etc. The housing 42 is connected between the two supports 41.

[0028] The outer shell 42 is provided with a jacket 413. The outer shell 42 is provided with an internal temperature-measuring thermocouple 417 that communicates with the interior of the mixing silo 421. The internal temperature-measuring thermocouple 417 is used to measure the internal temperature of the mixing silo 421. The jacket 413 is provided with a jacket temperature-measuring thermocouple 418 for measuring the temperature of the jacket 413. The integration of the jacket 413 and the temperature-measuring thermocouple in the outer shell 42 enables precise temperature control of the mixer 4, particularly for thermosetting resin matrices, to prevent high-temperature curing or fiber damage.

[0029] like Figure 1 、 Figure 3 As shown, the bottom of the housing 42 is provided with a feed opening 46, and a second valve 47 is provided at the feed opening 46. The second valve 47 controls the opening of the feed opening 46 and the amount of feed to be fed. The cover 43 is provided with a feed inlet 44 and an exhaust port 45.

[0030] like Figure 1 、 Figure 2 As shown, the first stirring mechanism 419 includes a main shaft 48 rotatably arranged on the support 41, a spiral belt 410 axially rotating along the main shaft 48, and a second driving source 411 installed on the support 41. The second driving source 411 is a motor, and its motor shaft is connected to the main shaft 48. The spiral belt 410 is located in the mixing bin 421. The spiral belt 410 is provided with a blade 49 extending radially along the main shaft 48. The angle formed by the spiral belt 410 extending spirally along the axial direction of the main shaft 48 and the blade 49 extending radially along the main shaft 48 can produce relative three-dimensional tumbling, forming material convection, not a simple horizontal vortex, and reducing stratification. In addition, the radially extending blade 49 can reduce the gap between it and the lining 412, prevent the powder substrate, and avoid the situation where it cannot be scraped.

[0031] like Figure 2 As shown, the second stirring mechanism 420 is disposed on the side and lower portion of the mixing hopper 421, specifically at the arc of the U-shaped housing 42. Two second stirring mechanisms 420 are symmetrically disposed in the width direction Y of the mixing hopper 421, and at least one second stirring mechanism 420 is disposed in the length direction X of the mixing hopper 421. The second stirring mechanism 420 is disposed in the length direction X at a position offset from the paddle 49.

[0032] The second stirring mechanism 420 includes a first drive source 416 mounted on the side wall of the mixing silo 421 via a mounting bracket 422. The first drive source 416 is a motor, with a knife shaft 415 connected to its motor shaft via a coupling. The knife shaft 415 extends into the mixing silo 421. Knives 414 are mounted on the knife shaft 415. Activating the first drive source 416 causes the knife 414 to rotate at high speed, performing a secondary fine dispersion on the carbon fiber agglomerates initially broken up by the first stirring mechanism 419.

[0033] The surface of the flying cutter 414 is sprayed with a tungsten carbide coating, which can extend the life of the flying cutter and prevent metal impurities from entering the material.

[0034] The first stirring mechanism 419 and the second stirring mechanism 420 designed in the mixer 4 cause the materials to tumble, break up, cut and divert, forming a synergistic effect, significantly improving the dispersion efficiency and uniformity, and solving the problems of traditional single stirring, complex mixing process with multiple equipment and incomplete dispersion.

[0035] like Figure 4 As shown, the present invention also provides a mixing system, comprising a feeding port 1, a material barrel 10, a screw feeder 7, the aforementioned mixer 4, and a control cabinet 11 with a display 12. The feeding port 1 is connected to the feed port 44 of the mixer via a first valve 2 and a first hose 3, respectively. The discharge port 46 of the mixer is connected to the screw feeder 7 via a second valve 47 and a second hose 6, respectively. The screw feeder 7 is connected to the material barrel 10 via a third hose 8. The first valve 2 is a pneumatic butterfly valve.

[0036] A weighing platform 9 is installed at the bottom of the barrel 10. The weighing platform 9, screw feeder 7, first valve 2, and mixer 4 are each electrically connected to a control cabinet 11. Feedback from the weighing platform 9 enables precise control of the screw feeder 7's discharge. Programming and coordinated control of the valve openings allows control of the feeding, mixing, and discharge quantities.

[0037] The feeding port 1 is connected to the mixer 4 via a first hose 3, the mixer 4 is connected to the screw feeder 7 via a second hose 6, and the screw feeder 7 is connected via a third hose 8. The hoses have room for up and down adjustment, making it easy to disassemble and clean each device.

[0038] Since the direction of movement of the material will change significantly when it falls from the mixer 4 to the screw feeder 7 (from vertical falling to horizontal conveying), an air hammer is provided on the second hose 6 to vibrate the second hose 6 to reduce material accumulation and avoid blockage of the second hose 6.

[0039] The working method of the mixing system provided by the utility model comprises the following steps:

[0040] S1, before feeding, open the first valve 2, close the second valve 47, start the first stirring mechanism 419 to run slowly to perform the breaking procedure;

[0041] S2, the material enters from the feeding port 1, passes through the first hose 3 and falls into the mixing bin 421 of the mixer 4. The material is quickly dispersed by the slow-running blades 49 and the spiral ribbon 410 to avoid accumulation in the middle of the mixing bin 421;

[0042] S3, after the feeding is finished, the control cabinet 11 sends a command to drive the first valve 2 to open and close quickly, shake off the residual material on it, and then close the first valve 2;

[0043] S4, start the first stirring mechanism 419 to quickly run the mixing process, and at the same time start the second stirring mechanism 420 to fully mix the materials;

[0044] S5, after the mixing is completed, the screw feeder 7 is started first, and then the second valve 47 is opened, and the material in the mixer 4 falls into the screw feeder 7;

[0045] S6: Driven by screw feeder 7, the material drops from third hose 8 into bucket 10. Bucket 10 is equipped with a weighing platform 9 at its bottom, which provides real-time feedback on the material weight to screw feeder 7. Because screw feeder 7 has a metering function, when the target weight is approached, the motor in screw feeder 7 is controlled to run slowly, allowing for more precise control of the discharge weight.

[0046] The various values ​​of the above working process are uniformly transmitted back to the control cabinet 11, and centralized programming control is performed in the control cabinet 11. The operating status of each device can be displayed in real time on the display 12.

[0047] The above description is merely an embodiment of the present invention and does not limit the patent scope of the present invention. Any equivalent structure or equivalent process transformation made by using the contents of the description and drawings of the present invention, or directly or indirectly applied in other related technical fields, are also included in the patent protection scope of the present invention.

Claims

1. A mixer, comprising a support (41), a mixing bin (421) connected to the support (41), and a first stirring mechanism (419) provided on the support (41) and used for stirring the material inside the mixing bin (421), wherein the upper end of the mixing bin (421) is provided with a feed port (44), and the lower end of the mixing bin (421) is provided with a discharge port (46), characterized in that: The invention also includes a second stirring mechanism (420) installed on the mixing bin (421), the second stirring mechanism (420) including a first driving source (416) installed on the side wall of the mixing bin (421) via a mounting seat (422), a flying knife shaft (415) extending into the interior of the mixing bin (421) is provided on the power output end of the first driving source (416), and a flying knife (414) is installed on the flying knife shaft (415).

2. The mixer according to claim 1, characterized in that The second stirring mechanism (420) is provided on the side and at the bottom of the mixing bin (421).

3. The mixer according to claim 1, characterized in that Two second stirring mechanisms (420) are symmetrically arranged in the width direction Y of the mixing bin (421), and at least one second stirring mechanism (420) is arranged in the length direction X of the mixing bin (421).

4. The mixer according to claim 1, characterized in that The mixing bin (421) comprises a shell (42) connected to a support (41) and a cover (43) provided on the shell (42); the feed port (44) is provided on the cover (43); and the discharge port (46) is provided at the bottom of the shell (42).

5. The mixer according to claim 4, characterized in that An inner surface of the outer shell (42) is provided with an inner lining (412), and an outer surface of the outer shell (42) is provided with a jacket (413).

6. The mixer according to claim 5, characterized in that The outer shell (42) is provided with an in-bin temperature measuring thermocouple (417) that is in communication with the interior of the mixing bin (421); and the jacket (413) is provided with a jacket temperature measuring thermocouple (418).

7. The mixer according to claim 1, characterized in that A second valve (47) is provided at the discharge port (46).

8. The mixer according to claim 1, characterized in that The first stirring mechanism (419) includes a main shaft (48) rotatably mounted on the support (41), a spiral belt (410) axially rotating along the main shaft (48), and a second driving source (411) mounted on the support (41), wherein the second driving source (411) is drivingly connected to the main shaft (48), and the spiral belt (410) is located in the mixing bin (421).

9. The mixer according to claim 8, characterized in that The spiral belt (410) is provided with blades (49) extending radially along the main shaft (48).

10. A mixing system, comprising a feeding port (1) and a material barrel (10), characterized in that: It also includes a screw feeder (7) and a mixer according to any one of claims 1 to 9, wherein the feeding port (1) is connected to the feeding port (44) of the mixer through a first valve (2) and a first hose (3), respectively; the discharge port (46) of the mixer is connected to the screw feeder (7) through a second valve (47) and a second hose (6), respectively; and the screw feeder (7) is connected to the material barrel (10) through a third hose (8).

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