Cleaning mechanism of stirring tank for liquid epoxy molding compound production

Abstract

The utility model relates to the technical field of epoxy molding compounds, in particular to a cleaning mechanism of a stirring tank for producing liquid epoxy molding compounds, which comprises a stirring shaft axially and rotatably arranged in the stirring tank, a driving motor for driving the stirring shaft to rotate, and at least one scraper adjusting part positioned on the arc-shaped outer wall of the stirring shaft, the scraper blade adjusting part comprises an upper support arm and a lower support arm which are respectively fixed at the top end and the bottom end outside the stirring shaft, and a movable scraper blade hinged between the upper support arm and the lower support arm, and the movable scraper blade is positioned between one ends, close to the stirring tank, of the upper support arm and the lower support arm. The electric telescopic cylinder is controlled to push the movable scraping plate to deflect, so that the distance between the movable scraping plate and the arc-shaped inner wall of the stirring tank is adjusted, the movable scraping plate is separated from the inner wall of the stirring tank in the stirring process, the scraping piece abuts against the inner wall of the stirring tank in the cleaning process, the abutting abrasion time between the scraping piece and the stirring tank is shortened, and the stirring efficiency is improved. And the service life of the doctor blade is greatly prolonged.

Description

Technical Field

[0001] This utility model relates to the field of epoxy molding compound technology, and in particular to a cleaning mechanism for a mixing tank used in the production of liquid epoxy molding compounds. Background Technology

[0002] The production of liquid epoxy molding compounds involves mixing various raw materials such as epoxy resin, curing agent, and filler. A mixing tank is used to melt some of the solid raw materials, and then the liquid raw materials are injected. Stirring is then used to ensure that the raw materials are evenly mixed to prevent imbalances in the curing agent or resin ratio, which could affect product performance. Because the mixed raw materials have adhesive properties, they tend to adhere to the curved inner wall and bottom of the mixing tank, making them difficult to mix and resulting in significant material waste.

[0003] To address the aforementioned technical problems, prior art patent application number 202320475464.2 discloses a tempering device for processing plastic granules. This device features a rotating shaft at the output end of a second motor, with a connecting rod radially positioned on its outer side. One end of the connecting rod has a vertically mounted side scraper, and the bottom end of the side scraper has a horizontally fixed lower scraper. One end of the lower scraper has a connecting ring, which rotatably fits around the bottom of the stirring shaft. The connecting rod, side scraper, and lower scraper together form a C-shaped frame. With the assistance of side scrapers and lower scrapers respectively mounted on the side and lower scrapers, the material adhering to the arc-shaped inner wall and bottom of the mixing tank can be scraped off under the drive of the second motor, facilitating mixing. In the aforementioned prior art, the side scraper is fixed to the side scraper and always in contact with the arc-shaped inner wall of the mixing tank. The distance between the side scraper and the inner wall of the mixing tank is difficult to adjust, affecting its service life and the horizontal flow mixing effect during material mixing. Utility Model Content

[0004] In view of this, the purpose of this utility model is to propose a cleaning mechanism for a mixing tank used in the production of liquid epoxy molding compound, so as to solve the problem that the distance between the side scraper and the inner wall of the mixing tank is difficult to adjust, which affects its service life and also affects the horizontal flow and mixing effect of raw materials.

[0005] To achieve the above objectives, this utility model provides a cleaning mechanism for a mixing tank used in the production of liquid epoxy molding compounds, comprising a stirring shaft axially rotatably disposed within the mixing tank and a drive motor for driving the stirring shaft to rotate. The cleaning mechanism further includes:

[0006] At least one scraper adjustment part is located on the arc-shaped outer wall of the stirring shaft, the scraper adjustment part including an upper support arm and a lower support arm respectively fixed to the top and bottom of the outside of the stirring shaft.

[0007] A movable scraper is hinged between the upper and lower support arms, and the movable scraper is located between the ends of the upper and lower support arms that are close to the mixing tank.

[0008] An L-shaped support arm is fixedly installed at the top of the outside of the movable scraper.

[0009] An electric telescopic cylinder is hinged at one end to the top of the upper support arm. An independent power supply is fixedly installed at the top of the upper support arm. The independent power supply supplies power to the electric telescopic cylinder through a wire. The other end of the electric telescopic cylinder is rotatably sleeved on the top of the L-shaped support arm. When stirring or cleaning, the electric telescopic cylinder drives the movable scraper to deflect away from or against the arc-shaped inner wall of the mixing tank.

[0010] Preferably, the scraper adjustment part further includes wedge blocks fixed side by side to the bottom of the lower support arm, with two adjacent wedge blocks forming a compression groove, and the opposing surfaces inside the compression groove forming a figure-eight shape.

[0011] Preferably, the movable scraper includes a flip bar hinged between the upper support arm and the lower support arm, the flip bar is provided with a scraper blade, and an elastic connector is provided between the top of the flip bar and the scraper blade.

[0012] Preferably, the elastic connector includes a vertical shaft fixed at the top of the flip bar away from the boundary of the upper support arm. The top end of the vertical shaft is rotatably connected to a through hole on the top of the scraper. A torsion spring is sleeved on the outside of the vertical shaft, and the two ends of the torsion spring are fixed to the scraper and the vertical shaft, respectively.

[0013] Preferably, the bottom end of the scraper is hinged to the bottom end of the flip bar, and the hinge between the scraper and the flip bar is coaxial with the vertical axis.

[0014] Preferably, the cleaning mechanism further includes two agitators disposed opposite to each other outside the agitator shaft. Each agitator includes a support frame fixedly disposed at the bottom of the agitator shaft. Several agitator blades are vertically arranged side by side inside the support frame. The axis of each agitator blade is collinear with one of the radial lines of the agitator shaft.

[0015] Preferably, the stirring blades inside the two support frames are staggered in height, and the axis of symmetry between the stirring blades inside the two support frames is the axis of the stirring shaft.

[0016] Preferably, the stirring component further includes a bottom scraper that is radially fixed to the bottom of the outside of the stirring shaft. One end of the bottom scraper away from the stirring shaft is fixed on the support frame. The two opposite surfaces of the bottom scraper are inclined surfaces, and the tops of the two inclined surfaces are close to each other. Several guide blocks are fixedly arranged in parallel along the radial direction of the stirring shaft on one of the inclined surfaces, and a diversion groove is formed between two adjacent guide blocks.

[0017] The beneficial effects of this utility model are:

[0018] This invention utilizes an electric telescopic cylinder to deflect a movable scraper, thereby adjusting the distance between the movable scraper and the arc-shaped inner wall of the mixing tank. During mixing, this allows the movable scraper to separate from the inner wall of the mixing tank, enabling the scraper to contact the inner wall during cleaning. This reduces the contact and wear time between the scraper and the tank, significantly extending the scraper's service life. Furthermore, the elastic hinge between the rotating strip and the scraper reduces the pressure between the scraper and the inner wall during cleaning, lowering wear without affecting cleaning effectiveness and further extending the scraper's service life. During mixing, the circumferential contact area between the movable scraper and the raw material can be flexibly adjusted as needed, as the mixing shaft drives the movable scraper to rotate, assisting in mixing and improving mixing efficiency. Attached Figure Description

[0019] To more clearly illustrate the technical solutions in this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only for this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0020] Figure 1 This is a three-dimensional illustration of the present invention. Figure 1 ;

[0021] Figure 2 This is a three-dimensional illustration of the present invention. Figure 2 ;

[0022] Figure 3 for Figure 2 Top view;

[0023] Figure 4 This is a three-dimensional illustration of the present invention. Figure 4 .

[0024] The diagram is marked as follows:

[0025] 1. Drive motor; 2. Stirring shaft; 3. Scraper adjustment section; 31. Upper support arm; 32. Lower support arm; 33. Movable scraper; 331. Tilting bar; 332. Scraper blade; 333. Elastic connector; 34. Electric telescopic cylinder; 35. Wedge block; 36. Extrusion groove; 37. L-shaped support arm; 38. Independent power supply; 4. Stirring component; 41. Support frame; 42. Stirring blade; 43. Bottom scraper; 44. Diverting guide block; 45. Diverting groove. Detailed Implementation

[0026] To make the objectives, technical solutions, and advantages of this utility model clearer, the present utility model will be further described in detail below with reference to specific embodiments.

[0027] It should be noted that, unless otherwise defined, the technical or scientific terms used in this utility model should have the ordinary meaning understood by one of ordinary skill in the art to which this utility model pertains. The terms "first," "second," and similar terms used in this utility model do not indicate any order, quantity, or importance, but are merely used to distinguish different components. Terms such as "comprising" or "including" mean that the element or object preceding the word encompasses the elements or objects listed following the word and their equivalents, without excluding other elements or objects. Terms such as "connected" or "linked" are not limited to physical or mechanical connections, but can include electrical connections, whether direct or indirect. Terms such as "upper," "lower," "left," and "right" are used only to indicate relative positional relationships; when the absolute position of the described object changes, the relative positional relationship may also change accordingly.

[0028] like Figures 1 to 4 As shown, a cleaning mechanism for a mixing tank used in the production of liquid epoxy molding compound includes a stirring shaft 2 axially rotatably disposed within the mixing tank and a drive motor 1 for driving the stirring shaft 2 to rotate. The cleaning mechanism also includes:

[0029] At least one scraper adjustment part 3 is located on the arc-shaped outer wall of the stirring shaft 2. The scraper adjustment part 3 includes an upper support arm 31 and a lower support arm 32, which are respectively fixed to the top and bottom of the outside of the stirring shaft 2.

[0030] A movable scraper 33 is hinged between the upper support arm 31 and the lower support arm 32, and the movable scraper 33 is located between the upper support arm 31 and the lower support arm 32 at one end near the mixing tank.

[0031] An L-shaped support arm 37 is fixedly installed at the top of the outside of the movable scraper 33.

[0032] An electric telescopic cylinder 34 is hinged at one end to the top of the upper support arm 31. An independent power supply 38 is fixedly installed at the top of the upper support arm 31. The independent power supply 38 supplies power to the electric telescopic cylinder 34 through a wire. The independent power supply 38 can also be electrically connected to an external power source through a brush slip ring, thus achieving external power supply. In this way, the independent power supply 38 can be continuously supplied with power to the electric telescopic cylinder 34 without the need to replace it. The other end of the electric telescopic cylinder 34 is rotatably sleeved on the top of the L-shaped support arm 37. When the electric telescopic cylinder 34 is stirring or cleaning, it drives the movable scraper 33 to deflect away from or against the arc-shaped inner wall of the mixing tank. That is, when the electric telescopic cylinder 34 extends and pushes the L-shaped support arm 37 to deflect towards the arc-shaped inner wall of the mixing tank, the vertical edge of the movable scraper 33 away from the upper support arm 31 deflects towards the upper support arm 31. At this time, the vertical edge of the movable scraper 33 away from the upper support arm 31 is in contact with the mixing tank. When the arc-shaped inner wall separates and moves away, and conversely, when the electric telescopic cylinder 34 is retracted, the vertical edge of the movable scraper 33 away from the upper support arm 31 approaches the arc-shaped inner wall of the mixing tank until the two come into contact. At this time, the drive motor 1 drives the stirring shaft 2 to rotate, which in turn drives the movable scraper 33 to rotate synchronously. The surface of the movable scraper 33 with an angle greater than 90° with the inner wall of the mixing tank faces the same direction as the rotation of the stirring shaft 2, thus scraping off the raw material attached to the inner wall of the mixing tank. In this way, the contact between the movable scraper 33 and the arc-shaped inner wall of the mixing tank can be controlled as needed, which greatly reduces the friction contact time between the movable scraper and the arc-shaped inner wall of the mixing tank, thereby reducing its wear and extending its service life. It also allows for flexible adjustment of the contact range between the movable scraper 33 and the raw material in the circumferential direction during mixing, assisting in the mixing of raw materials and improving the mixing efficiency.

[0033] like Figure 1 , Figure 2 and Figure 4 As shown, the scraper adjustment part 3 also includes wedge blocks 35 fixed side by side to the bottom of the lower support arm 32. Two adjacent wedge blocks 35 enclose each other to form a squeezing groove 36. The opposing surfaces inside the squeezing groove 36 are combined into a figure-eight shape, that is, the openings at both ends of the squeezing groove 36 are different sizes. When the lower support arm 32 rotates with the stirring shaft 2, the amount of raw material entering the squeezing groove 36 is increased. By increasing the squeezing force between the local raw materials, the mixing effect is improved.

[0034] like Figures 2 to 4 As shown, the movable scraper 33 includes a flip bar 331 hinged between the upper support arm 31 and the lower support arm 32, a scraper blade 332 is provided on the flip bar 331, and an elastic connector 333 is provided between the top of the flip bar 331 and the scraper blade 332.

[0035] The elastic connector 333 includes a vertical shaft fixed to the top of the flip bar 331 at a boundary away from the upper support arm 31. The top end of the vertical shaft is rotatably connected to a through hole on the top of the scraper 332. A torsion spring is sleeved on the outside of the vertical shaft, and the two ends of the torsion spring are fixed to the scraper 332 and the vertical shaft, respectively.

[0036] The bottom end of the scraper 332 is hinged to the bottom end of the rotating bar 331, and the hinge between the scraper 332 and the rotating bar 331 is coaxial with the vertical axis. In this way, during the stirring process, the scraper 332 can be deflected under the mutual stress between the raw material and the scraper. The angle of deflection of the scraper 332 is proportional to the magnitude of the stress. Thus, by changing the speed of the drive motor 1, the path width of the scraper 332 as it rotates with the stirring shaft 2 can be changed, thereby improving the stirring effect.

[0037] like Figures 2 to 4 As shown, the cleaning mechanism also includes two agitators 4 located opposite to the outside of the agitator shaft 2. The agitator 4 includes a support frame 41 fixedly located at the bottom of the outside of the agitator shaft 2. Several agitators 42 are vertically arranged in parallel inside the support frame 41. The axis of the agitator 42 is collinear with one of the radial lines of the agitator shaft 2.

[0038] The stirring blades 42 inside the two support frames 41 are staggered in height, and the axis of symmetry between the stirring blades 42 inside the two support frames 41 is the axis of the stirring shaft 2. This design allows the position of the raw materials to be changed vertically, so that raw materials at different heights can be mixed. The driving direction can be changed by controlling the drive motor 1 to drive the stirring shaft 2 to rotate alternately in both directions, thus improving the mixing effect of the raw materials in the vertical direction. At the same time, the movable scraper 33, which is separated from the inner wall of the mixing tank, has an adjustable range of contact with the raw materials in the circumferential direction, so the position of the raw materials in the horizontal direction can also be changed synchronously. Thus, the raw materials can be mixed in three dimensions, improving the efficiency of raw material mixing.

[0039] like Figure 2 and Figure 4As shown, the mixing component 4 also includes a bottom scraper 43 radially fixed to the bottom of the outside of the mixing shaft 2. One end of the bottom scraper 43 away from the mixing shaft 2 is fixed to the support frame 41. The two opposite surfaces of the bottom scraper 43 are inclined surfaces, and the tops of the two inclined surfaces are close to each other, that is, the included angle between the tops of the two inclined surfaces is less than 90°. The bottom of the bottom scraper 43 is a horizontal surface, and there is a very small gap between the bottom of the bottom scraper 43 and the bottom of the mixing tank, which does not contact each other. In this way, most of the raw materials on the bottom of the mixing tank can be scooped up. Several guide blocks 44 are fixed in parallel along the radial direction of the mixing shaft 2 on one of the inclined surfaces. Adjacent guide blocks 44 form a diversion groove 45. The guide block 44 on one bottom scraper 43 corresponds to the diversion groove 45 on the other bottom scraper 43. In this way, when the two bottom scrapers pass through the same position, they can push the raw materials towards the center of the mixing tank in the radial direction, thereby improving the mixing effect of the raw materials at the bottom of the mixing tank.

[0040] Working principle: Before stirring, when the electric telescopic cylinder 34 extends and pushes the L-shaped support arm 37 to deflect towards the arc-shaped inner wall of the mixing tank, the vertical edge of the movable scraper 33 away from the upper support arm 31 deflects towards the upper support arm 31. At this time, the vertical edge of the movable scraper 33 away from the upper support arm 31 separates from and moves away from the arc-shaped inner wall of the mixing tank. When it is necessary to clean the arc-shaped inner wall of the mixing tank, the electric telescopic cylinder 34 retracts and pulls the movable scraper 33 to deflect, bringing its vertical edge away from the upper support arm 31 closer to the arc-shaped inner wall of the mixing tank until the two come into contact. At this time, the drive motor 2 drives the stirring shaft 2 to rotate, which in turn drives the movable scraper 33 to rotate synchronously. The surface of the movable scraper 33 with an angle greater than 90° to the inner wall of the mixing tank faces the same direction as the rotation of the stirring shaft 2. This allows for the scraping of the material adhering to the inner wall of the mixing tank. Thus, the contact time between the movable scraper 33 and the curved inner wall of the mixing tank can be controlled as needed, greatly reducing wear and extending its service life. It also allows for more flexible mixing. The adjustable range of the movable scraper 33 in contact with the raw material in the circumferential direction assists in stirring the raw material and improves the stirring efficiency. By controlling the drive motor 1 to change the driving direction, the stirring shaft 2 can be driven to rotate alternately in both directions, thus improving the stirring and mixing effect of the raw material in the vertical direction. At the same time, the adjustable range of the movable scraper 33 in contact with the raw material in the circumferential direction can also change the position of the raw material in the horizontal direction, thus stirring and mixing the raw material in three dimensions and improving the stirring and mixing efficiency. Meanwhile, the bottom scraper 43 can scoop up most of the raw material at the bottom of the stirring tank. Several guide blocks 44 are fixedly arranged in parallel along the radial direction of the stirring shaft 2 on one of the inclined surfaces. Adjacent guide blocks 44 form a diversion groove 45. The guide blocks 44 on one bottom scraper 43 correspond to the diversion groove 45 on another bottom scraper 43. Thus, when the two bottom scrapers pass through the same position, they can push the raw material towards the center of the stirring tank in the radial direction, improving the stirring effect of the raw material at the bottom of the stirring tank.

[0041] Those skilled in the art should understand that the discussion of any of the above embodiments is merely exemplary and is not intended to imply that the scope of the present invention (including the claims) is limited to these examples; within the framework of the present invention, the technical features of the above embodiments or different embodiments can also be combined, the steps can be implemented in any order, and there are many other variations of the different aspects of the present invention as described above, which are not provided in the details for the sake of brevity.

[0042] This utility model is intended to cover all such substitutions, modifications, and variations that fall within the broad scope of the appended claims. Therefore, any omissions, modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this utility model should be included within the protection scope of this utility model.

Claims

1. A cleaning mechanism for a mixing tank used in the production of liquid epoxy molding compound, comprising a stirring shaft (2) axially rotatably disposed within the mixing tank and a drive motor (1) for driving the stirring shaft (2) to rotate, characterized in that, The cleaning mechanism also includes: At least one scraper adjustment part (3) is located on the arc-shaped outer wall of the stirring shaft (2), the scraper adjustment part (3) includes an upper support arm (31) and a lower support arm (32) respectively fixed to the top and bottom of the outside of the stirring shaft (2); A movable scraper (33) is hinged between the upper support arm (31) and the lower support arm (32), and the movable scraper (33) is located between the upper support arm (31) and the lower support arm (32) near the end of the mixing tank; An L-shaped support arm (37) is fixedly installed at the top of the outside of the movable scraper (33); An electric telescopic cylinder (34) is hinged at one end to the top of the upper support arm (31). The other end of the electric telescopic cylinder (34) is rotatably sleeved on the top of the L-shaped support arm (37). When stirring or cleaning, the electric telescopic cylinder (34) drives the movable scraper (33) to deflect away from or against the arc-shaped inner wall of the stirring tank.

2. The cleaning mechanism for the agitator tank for producing liquid epoxy molding compound according to claim 1, wherein The scraper adjustment part (3) also includes wedge blocks (35) fixed side by side at the bottom of the lower support arm (32), and two adjacent wedge blocks (35) form a compression groove (36), and the opposing surfaces inside the compression groove (36) are combined into a figure-eight shape.

3. The cleaning mechanism for the agitator tank for producing liquid epoxy molding compound according to claim 1, wherein The movable scraper (33) includes a flip bar (331) hinged between the upper support arm (31) and the lower support arm (32), the flip bar (331) is provided with a scraper (332), and an elastic connector (333) is provided between the top of the flip bar (331) and the scraper (332).

4. The cleaning mechanism for the agitator tank for producing liquid epoxy molding compound according to claim 3, wherein The elastic connector (333) includes a vertical shaft fixed at the top of the flip bar (331) away from the boundary of the upper support arm (31). The top end of the vertical shaft is rotatably sleeved with a through hole on the top of the scraper (332). A torsion spring is sleeved on the outside of the vertical shaft. The two ends of the torsion spring are fixed on the scraper (332) and the vertical shaft, respectively.

5. The cleaning mechanism for the agitator tank for producing liquid epoxy molding compound according to claim 4, wherein The bottom end of the scraper (332) is hinged to the bottom end of the flip bar (331), and the hinge between the scraper (332) and the flip bar (331) is coaxial with the vertical axis.

6. The cleaning mechanism for the agitator tank for producing liquid epoxy molding compound according to claim 1, wherein The cleaning mechanism also includes two agitators (4) located opposite to the outside of the agitator shaft (2). The agitator (4) includes a bottom support frame (41) fixedly located outside the agitator shaft (2). Several agitators (42) are vertically arranged in parallel inside the support frame (41). The axis of the agitator (42) is collinear with one of the radial lines of the agitator shaft (2).

7. The cleaning mechanism for the agitator tank for producing liquid epoxy molding compound according to claim 6, wherein The stirring blades (42) inside the two support frames (41) are staggered in height, and the axis of symmetry between the stirring blades (42) inside the two support frames (41) is the axis of the stirring shaft (2).

8. The cleaning mechanism for the mixing tank used in the production of liquid epoxy molding compound according to claim 7, characterized in that, The stirring component (4) also includes a bottom scraper (43) that is radially fixed to the bottom of the stirring shaft (2). One end of the bottom scraper (43) away from the stirring shaft (2) is fixed on the support frame (41). The two opposite surfaces of the bottom scraper (43) are inclined surfaces, and the tops of the two inclined surfaces are close to each other. Several guide blocks (44) are fixed in parallel along the radial direction of the stirring shaft (2) on one of the inclined surfaces. A diversion groove (45) is formed between two adjacent guide blocks (44).

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