Preparation Process of Super Wear-Resistant Matte UV Resin

Abstract

This application relates to a process for preparing an ultra-wear-resistant matte UV resin, and relates to the technical field of resin preparation. The process includes the following steps: vacuuming: vacuuming the container used to hold the material to reduce the amount of air in the container that can be absorbed by the material for future use; stirring and breaking bubbles: stirring the material to break up bubbles that have already formed in the material; under the action of continuous vacuuming, sucking out the air mixed in the material for future use; and defoaming: absorbing foam above the material liquid level and transferring the absorbed foam to the outside of the container. This application has the effect of reducing the number of bubbles in the material and improving the quality of the product after molding.

Description

Technical Field

[0001] The present application relates to the technical field of resin preparation technology, and in particular to a preparation process of ultra-wear-resistant matte UV resin. Background Art

[0002] UV resin generally refers to a polymer compound that exhibits fluidity when softened and is solid or semi-cured at room temperature. It is used to make coatings, adhesives, insulation materials, and other products, as well as plastics. Currently, UV resins with high wear resistance and a matte finish are a category of resins that are in urgent need of research and development.

[0003] In the actual preparation of wear-resistant matte UV resin, the fluid resin slurry is mechanically stirred and mixed with an emulsifier to form an emulsion of monomers in an aqueous liquid other than the resin slurry, which then initiates monomer polymerization. The resin slurry and other materials are typically stirred in a stirred tank, and the stirred materials are then filtered through a filter.

[0004] However, a large number of bubbles are easily generated during the process of stirring and filtering the material through the filter. The main component of the material is resin, which has the characteristics of high viscosity and low surface tension, making it difficult for the bubbles in the material to dissipate, greatly affecting the quality of the product after molding. Summary of the Invention

[0005] In order to improve the problem that a large number of bubbles are easily generated during the stirring and filtration process of the material, the present application provides a preparation process for super wear-resistant matte UV resin.

[0006] The preparation process of the super wear-resistant matte UV resin provided in this application adopts the following technical solution:

[0007] Vacuuming: Vacuum the container used to load the material to reduce the amount of air in the container that can be absorbed by the material for future use;

[0008] Stirring and breaking bubbles: Stirring materials to break bubbles that have formed in the materials; under the action of continuous vacuuming, suck out the air mixed in the materials for future use;

[0009] Defoaming treatment: absorb the foam above the material liquid level and transfer the absorbed foam to the outside of the container.

[0010] By adopting the above technical solution, the container loaded with the material is vacuumed, and the air content in the container is reduced, so the number of bubbles that continue to be generated in the material is controlled; in addition, in the vacuum state, it is not easy for new air to mix into the material during the stirring process, so that it is not easy for the material to generate bubbles during stirring, which further reduces the bubbles in the material; the material is cut during stirring to break the bubbles in the material; the foam generated in the material due to the broken bubbles is absorbed, and the phenomenon of foam being converted back into bubbles is reduced. At the same time, it helps to reduce the phenomenon of bubbles generated in the material during subsequent filtration; this process effectively reduces the bubbles in the material and helps to ensure the quality of the product after it is formed.

[0011] In a specific possible implementation scheme, in the vacuuming step, the container includes a kettle body and a kettle cover, the inner cavity of the kettle body is used to load materials, and the kettle cover is arranged on the kettle body to seal the kettle body; the kettle body is vacuumed by a vacuuming device, and the vacuuming device includes a suction piece and an air guide pipe, the suction piece is arranged on one side of the kettle body, one end of the air guide pipe is connected to the suction piece, and the other end passes through the kettle cover to be located in the inner cavity of the kettle body.

[0012] By adopting the above technical solution, the kettle body is used to load materials, and the kettle cover is used to seal the kettle body; the suction piece sucks the air in the kettle body through the air guide pipe, so that the material is in a vacuum space, which helps to reduce the generation of bubbles in the material.

[0013] In a specific possible implementation scheme, in the stirring and foam breaking step, the material is stirred by a stirring device, and the stirring device includes a driving member, a connecting shaft, a positioning seat and multiple groups of foam breaking components; the driving member is arranged on the kettle body, and the output end of the driving member is passed through the inner cavity of the kettle body; the positioning seat is arranged in the side wall of the kettle body, and the positioning seat is arranged relative to the driving member; one end of the connecting shaft is connected to the output end of the driving member, and the other end is connected to the positioning seat; all the foam breaking components are arranged at intervals on the connecting shaft, and each of the foam breaking components is used to stir the material and break the bubbles in the material.

[0014] By adopting the above technical solution, the stirring device arranged in the horizontal direction has a large contact area with the material, and a large number of bubble breaking components can all contact the material, which improves the sufficient stirring of the material and helps to reduce the number of bubbles in the material.

[0015] In a specific possible implementation scheme, each of the bubble breaking components includes a push plate, multiple preset rods and multiple cutting ring plates. The push plate is arranged on a connecting shaft, and multiple flow channels for the material to pass through are arranged through the push plate; one of the preset rods is rotatably arranged in the side wall of a flow channel, and all the cutting ring plates are respectively and spaced apart on all the preset rods.

[0016] By adopting the above technical solution, the push plate rotates inside the material with the help of the connecting shaft to stir the material; when the material hits the push plate, part of the material passes through the flow channel to speed up the flow speed inside the material, which helps to squeeze the bubbles in the material to break them; the preset rotating rod rotates when the material passes through the flow channel, and multiple cutting ring plates cut the material at the same time, so that the material passing through the flow channel is further divided, so as to further improve the breakage rate of bubbles attached to the material and reduce the number of bubbles in the material.

[0017] In a specific embodiment, the outer circumferential dimensions of adjacent cutting ring plates increase or decrease gradually along the extending direction of the preset rod.

[0018] By adopting the above technical solution, cutting ring plates with different outer circumference sizes can cut out spaces of different sizes on the material. This variable diameter cutting method can greatly improve the crushing rate of bubbles in the material, thereby helping to reduce the number of bubbles in the material.

[0019] In a specific possible implementation scheme, the stirring device also includes a fixing assembly, which includes a docking arc plate and a locking bolt; the docking arc plate is arranged on the pusher plate, and the locking bolt is used to position the docking arc plate on the connecting shaft.

[0020] By adopting the above technical solution, the docking arc plate increases the contact area between the pusher plate and the connecting shaft, the locking bolt realizes the rapid connection between the docking arc plate and the connecting shaft and facilitates the operator to quickly disassemble the pusher plate for maintenance and replacement.

[0021] In a specific possible implementation scheme, in the defoaming treatment step, the foam is absorbed by a bubble inducing device and transported to the outside of the kettle body by a bubble guiding device; the bubble inducing device includes a flow partition, which is arranged in the side wall of the kettle body; a plurality of ventilation channels for air flow are provided through the flow partition, and a plurality of bubble inducing channels are also provided through the flow partition, and one bubble inducing channel is arranged alternately with a ventilation channel, and a plurality of bubble inducing holes communicating with the bubble inducing channels are also provided on the flow partition; the bubble guiding device includes a plurality of bubble guiding tubes, one end of each of the bubble guiding tubes is provided through the kettle body, and is positioned in the side wall at any end of any of the ventilation channels.

[0022] By adopting the above technical solution, the suction piece sucks the air and foam in the kettle body through the air guide pipe. The foam moves with the air flow to the flow partition plate, enters the bubble induction channel through the bubble induction hole, and is then transported to the outside of the kettle body by the bubble guide pipe, thereby effectively reducing the amount of foam in the kettle body, helping to reduce the phenomenon of foam forming bubbles again, and helping to reduce the number of bubbles generated in the subsequent filtration of the material, thereby ensuring the quality of the product after molding.

[0023] In a specific embodiment, the bubble inducing device further comprises a plurality of foam isolation mesh plates, and one of the foam isolation mesh plates is disposed in a side wall of a ventilation channel.

[0024] By adopting the above technical solution, the foam isolation mesh is used to ground the foam, reducing the phenomenon of foam passing through the ventilation channel, thereby making it easier for the foam to be discharged to the outside of the kettle body through the bubble induction holes.

[0025] In a specific possible implementation scheme, the bubble-inducing device also includes a positioning assembly, which includes a plurality of side extension plates, a plurality of stop screws and a plurality of fastening nuts; the side extension plates are arranged on the flow partition plate, and the kettle body is provided with a plurality of sedimentation troughs for the side extension plates to be pressed into; one of the stop screws is arranged in the side wall of a sedimentation trough, the stop screw is passed through the side extension plate, and one of the fastening nuts is threadedly connected to a stop screw to position the side extension plate in the side wall of the sedimentation trough.

[0026] By adopting the above technical solution, after the stop screw passes through the side extension plate, the fastening nut is threadedly tightened on the stop screw, so that the side extension plate is quickly positioned in the side wall of the sedimentation tank, and the flow partition is quickly positioned in the side wall of the kettle body, thereby ensuring the position stability and application stability of the flow partition in the kettle body; at the same time, it is convenient for operators to quickly disassemble the flow partition for maintenance and replacement.

[0027] In summary, this application has the following beneficial technical effects:

[0028] 1. The vacuuming step is used to reduce the air in the container, creating a negative pressure space in the container, thereby reducing the generation of bubbles in the material and helping to reduce the generation of new bubbles due to air mixing during the stirring process;

[0029] 2. The flow channel cuts the material against the push plate, which helps to squeeze out bubbles. The preset rod with the cutting ring plate rotates, causing the cutting ring plate with a variable diameter to cut the material at the same time, further improving the bubble crushing rate and reducing the number of bubbles in the material.

[0030] 3. The suction piece sucks the air and foam in the kettle through the air guide pipe, reducing the amount of foam in the kettle, which helps to reduce the phenomenon of bubbles generated when the material is filtered. BRIEF DESCRIPTION OF THE DRAWINGS

[0031] Figure 1 2 is a schematic cross-sectional structural diagram of the positional relationship of the vacuuming device, the stirring device, the bubble inducing device, and the bubble guiding device on the kettle body in the embodiment of the present application along the vertical direction;

[0032] Figure 2 Schematic diagram of a bubble breaking assembly in an embodiment of the present application;

[0033] Figure 3Schematic diagram of the positional relationship between the pusher plate and the docking arc plate in an embodiment of the present application;

[0034] Figure 4 1. It is a top view of the positional relationship between the flow partition, the edge extension plate, and the foam screen plate in the embodiment of the present application;

[0035] Figure 5 It is a schematic cross-sectional view along the vertical direction showing the positional relationship between the flow partition and the foam screen in the embodiment of the present application.

[0036] Description of reference numerals:

[0037] 1. Kettle body; 11. Kettle cover; 12. Sedimentation tank; 2. Vacuum pump; 21. Suction member; 22. Air guide duct; 3. Stirring device; 31. Driving member; 32. Connecting shaft; 33. Positioning seat; 34. Bubble breaking assembly; 341. Pushing plate; 3411. Flow channel; 342. Preset rod; 343. Cutting ring plate; 35. Fixing assembly; 351. Docking arc plate; 352. Locking bolt; 4. Bubble inducing device; 41. Flow barrier; 411. Ventilation channel; 412. Bubble inducing channel; 413. Bubble inducing hole; 42. Positioning assembly; 421. Side extension plate; 422. Stop screw; 423. Fastening nut; 43. Foam isolation mesh plate; 5. Bubble guiding device; 51. Bubble guiding pipe. DETAILED DESCRIPTION

[0038] The examples of the present application disclose a preparation process of an ultra-wear-resistant matte UV resin.

[0039] The following is combined with Figure 1-5 This application is described in further detail.

[0040] Reference Figure 1 The preparation process of super wear-resistant matte UV resin includes the following preparation steps:

[0041] Vacuuming: Refer to Figure 1 The material is loaded through the kettle body 1 with the kettle cover 11, wherein the kettle cover 11 is sealed on the kettle body 1 to form a sealed space in the inner cavity of the kettle body 1.

[0042] Reference Figure 1 The kettle body 1 is vacuumed by a vacuuming device 2 to reduce the air in the inner cavity of the kettle body 1. The vacuuming device 2 includes a suction member 21 and an air guide duct 22. The suction member 21 can be a vacuum pump, which is fixed to the ground by bolts and is located on one side of the kettle body 1.

[0043] Reference Figure 1One end of the air duct 22 is sealed to the suction port of the suction member 21 via a sealing ring. The end of the air duct 22, away from the suction member 21, passes through the kettle cover 11 and extends into the interior of the kettle body 1. At this point, the end of the air duct 22 within the interior of the kettle body 1 is above the liquid level of the material. The suction member 21 draws air from the interior of the kettle body 1 through the air duct 22, placing the material in a vacuum chamber and thereby helping to reduce the formation of bubbles in the material.

[0044] Stirring and breaking bubbles: refer to Figure 1 The material is stirred and the bubbles formed in the material are broken by the stirring device 3. The stirring device 3 includes a driving member 31, a connecting shaft 32, a positioning seat 33 and multiple groups of bubble breaking components 34. The driving member 31 can be a motor and the positioning seat 33 can be a bearing seat.

[0045] Reference Figure 1 The driving member 31 is fixed to the outer wall of the kettle body 1 by bolts, and the output end of the driving member 31 passes through the kettle body 1 and is located in the inner cavity of the kettle body 1. The positioning seat 33 is fixed to the inner wall of the kettle body 1 by bolts, and the central axis of the positioning seat 33 is collinear with the central axis of the output end of the driving member 31.

[0046] Reference Figure 1 One end of the connecting shaft 32 in the longitudinal direction is connected to the output end of the driving member 31 through a flange, and the other end of the connecting shaft 32 in the longitudinal direction is set on the positioning seat 33. The driving member 31 rotates forward or reversely, causing the connecting shaft 32 to rotate clockwise or counterclockwise in the inner cavity of the kettle body 1.

[0047] Reference Figure 1 and Figure 2 The bubble breaking assembly 34 includes a push plate 341. In order to stably install the push plate 341 on the connecting shaft 32 and facilitate disassembly, maintenance or replacement, the stirring device 3 also includes a fixing assembly 35, and the push plate 341 is detachably connected to the push plate 341 through the fixing assembly 35.

[0048] Reference Figure 1 and Figure 3 The fixing assembly 35 includes a docking arc plate 351 and a locking bolt 352. The inner radius of the docking arc plate 351 matches the outer radius of the connecting shaft 32. The docking arc plate 351 is welded to the pusher plate 341. After the docking arc plate 351 and the connecting shaft 32 are abutted, the locking bolt 352 passes through the docking arc plate 351 and is screwed into the pre-set thread groove of the connecting shaft 32, thereby fixing the docking arc plate 351 and the connecting shaft 32 and stably mounting the pusher plate 341 on the connecting shaft 32. As the driving member 31 drives the connecting shaft 32 to rotate, the pusher plate 341 stirs the material inside the material. During the stirring process, the air between the materials is continuously sucked out through the air guide duct 22, thereby helping to reduce the number of bubbles in the material stirring process.

[0049] Reference Figure 2 To break up any bubbles already generated in the material, the push plate 341 is further provided with a plurality of flow channels 3411. The flow channels 3411 are used to allow the portion of material that abuts the push plate 341 to quickly pass through the push plate 341, thereby accelerating the flow of the various fluids within the material. The rapid extrusion generated by the fast-flowing material during displacement can break up some bubbles.

[0050] Reference Figure 2 In addition, each bubble breaking assembly 34 also includes multiple preset rods 342 and multiple cutting ring plates 343. The cutting ring plates 343 can be circular slices formed from pressed steel plates and welded to the outer circumferential wall of the preset rods 342. In this embodiment, there can be four cutting ring plates 343 on a single preset rod 342, and the outer circumferences of the four cutting ring plates 343 on the same preset rod 342 increase in size along the length of the preset rod 342.

[0051] Reference Figure 1 and Figure 2 A pre-set rod 342 is rotatably mounted on two bearings within the sidewall of a flow channel 3411. As material passes through flow channel 3411, four variable-diameter cutting rings 343 located on the same pre-set rod 342 simultaneously cut the material, breaking up any air bubbles trapped within it. Furthermore, the cutting rings 343 further divide the material passing through flow channel 3411, increasing the likelihood that bubbles within the material will come into contact, squeeze, and break, thereby reducing the number of bubbles in the material. Furthermore, the suction element 21 continuously draws a vacuum from the interior of the kettle 1 via the air duct 22. As the material is continuously divided, the air within the material is further drawn in, further reducing the amount of air trapped within the material.

[0052] Defoaming treatment: refer to Figure 1 and Figure 2 The bubbles in the material are continuously reduced or broken by the dual effects of air reduction and cutting by the cutting ring plate 343. A certain amount of foam appears on the surface of the material due to the broken bubbles. This light foam easily floats with the airflow and accumulates on the top of the material. The foam above the material liquid level is absorbed by the bubble inducing device 4 and then transported to the outside of the container by the bubble guiding device 5.

[0053] Reference Figure 1 and Figure 4The bubble-inducing device 4 includes a flow divider 41 and a positioning assembly 42. The flow divider 41 is a solid steel plate with multiple ventilation channels 411 extending through it. The flow divider 41 is positioned within the sidewall of the kettle 1 via the positioning assembly 42, positioned above the material. When the suction unit 21 draws air and foam from the interior of the kettle 1 through the air duct 22, air flows through the ventilation channels 411, alternating between above and below the flow divider 41.

[0054] Reference Figure 1 and Figure 4 The positioning assembly 42 includes multiple side extension plates 421, multiple stop screws 422, and multiple fastening nuts 423. The side extension plates 421 are welded to the outer circumference of the flow divider 41. The kettle body 1 is provided with multiple settling troughs 12. The inner cavity of the settling troughs 12 communicates with the inner cavity of the kettle body 1, and the inner diameter of the settling troughs 12 is compatible with the outer circumference of the side extension plates 421.

[0055] Reference Figure 1 and Figure 4 A stop screw 422 is welded to the inner bottom wall of a settling tank 12. After a side extension plate 421 is inserted into the inner cavity of a settling tank 12, the stop screw 422 passes through the side extension plate 421. A fastening nut 423 is threadedly connected to the stop screw 422, positioning the side extension plate 421 in the side wall of a settling tank 12, thereby quickly positioning the flow divider 41 in the side wall of the kettle body 1.

[0056] Reference Figure 1 and Figure 5 Multiple bubble-inducing channels 412 are also formed along the longitudinal end wall of the flow divider 41, with each bubble-inducing channel 412 separated by a ventilation channel 411. Multiple bubble-inducing holes 413 are provided on the bottom wall of the flow divider 41, located at each bubble-inducing channel 412. The inner cavities of the bubble-inducing holes 413 communicate with the inner cavities of the bubble-inducing channels 412. When the suction member 21 draws air and foam from the interior of the kettle body 1 through the air-guiding channels, the foam is displaced toward the flow divider 41 with the airflow, and some of the foam enters the bubble-inducing channels 412 through the bubble-inducing holes 413.

[0057] Reference Figure 1 and Figure 5 The bubble guiding device 5 includes a bubble guiding tube 51. The end of the bubble guiding tube 51, which is closest to the kettle body 1, extends through the inner cavity of the kettle body 1 and is interference-fitted into the sidewall of one end of the lengthwise direction of any bubble induction channel 412. In this embodiment, a bubble guiding tube 51 is inserted at both ends of the lengthwise direction of all bubble guiding channels. Foam entering the bubble guiding channels is cleared and discharged to the outside of the kettle body 1 through the bubble guiding tube 51, thereby reducing the amount of foam in the inner cavity of the kettle body 1 and significantly reducing the number of bubbles generated during the subsequent filtration process of the material.

[0058] Reference Figure 4 and Figure 5 To reduce the risk of foam passing through the ventilation channel 411, the bubble-inducing device 4 further includes a plurality of foam-isolating mesh panels 43. These are U-shaped, dense mesh panels formed from assembled steel wire. Each foam-isolating mesh panel 43 is welded to the sidewall of each ventilation channel 411 to abut against foam entering the ventilation channel 411, thereby reducing the risk of foam passing through the channel.

[0059] The above are all preferred embodiments of the present application, and are not intended to limit the scope of protection of the present application. Therefore, any equivalent changes made based on the structure, shape, and principle of the present application should be included in the scope of protection of the present application.

Claims

1. The preparation process of super wear-resistant matte UV resin is characterized by: The invention comprises the following preparation steps: vacuuming: vacuuming a container for loading materials to reduce the air in the container that can be absorbed by the materials for future use; stirring and breaking bubbles: stirring the materials to break the bubbles that have formed in the materials; under the action of continuous vacuuming, sucking the air mixed in the materials for future use; defoaming: absorbing the foam above the liquid level of the materials and transferring the absorbed foam to the outside of the container; in the vacuuming step, the container comprises a kettle body (1) and a kettle cover (11), the inner cavity of the kettle body (1) is used for loading materials, and the kettle cover (11) is arranged on the kettle body (1) to seal the kettle body (1); vacuuming the kettle body (1) by a vacuuming device (2), and the vacuuming device (2) comprises a suction piece (21) and an air guide pipe (22), the suction member (21) is arranged on one side of the kettle body (1), one end of the air guide pipe (22) is connected to the suction member (21), and the other end passes through the kettle cover (11) to be located in the inner cavity of the kettle body (1); in the stirring and foam breaking step, the material is stirred by a stirring device (3), and the stirring device (3) comprises a driving member (31), a connecting shaft (32), a positioning seat (33) and a plurality of groups of foam breaking components (34); the driving member (31) is arranged on the kettle body (1), and the output end of the driving member (31) passes through the inner cavity of the kettle body (1); the positioning seat (33) is arranged in the side wall of the kettle body (1), and the positioning seat (33) is arranged relative to the driving member (31); the connecting shaft (32) wherein One end is connected to the output end of the driving member (31), and the other end is connected to the positioning seat (33); all the bubble breaking components (34) are arranged at intervals on the connecting shaft (32), and each bubble breaking component (34) is used to stir the material and break the bubbles in the material; in the defoaming process, the bubble is absorbed by the bubble inducing device (4), and the bubble is transported to the outside of the kettle body (1) by the bubble guiding device (5); the bubble inducing device (4) includes a flow partition (41), and the flow partition (41) is arranged in the side wall of the kettle body (1); a plurality of ventilation channels (411) for air flow circulation are provided on the flow partition (41), and a plurality of bubble inducing channels (412) are also provided on the flow partition (41), and one of the bubble inducing channels (411) is provided. 12) a ventilation channel (411) is provided at intervals, and a plurality of bubble-inducing holes (413) communicating with the bubble-inducing channel (412) are further provided on the flow partition (41); the bubble-inducing device (5) comprises a plurality of bubble-inducing tubes (51), one end of each of the bubble-inducing tubes (51) is passed through the kettle body (1) and positioned in the side wall of any one end of any ventilation channel (411); the bubble-inducing device (4) further comprises a plurality of foam-isolating mesh plates (43), one of the foam-isolating mesh plates (43) is provided in the side wall of a ventilation channel (411); when the suction member (21) sucks air and foam in the inner cavity of the kettle body (1) through the air guide pipe (22), the air flow passes through the ventilation channel (411) to interact above and below the flow partition (41);The foam moves toward the flow partition (41) along with the air flow, and part of the foam enters the bubble induction channel (412) through the bubble induction hole (413); the foam entering the bubble induction channel (412) is discharged to the outside of the kettle (1) through the bubble guide pipe (51), thereby reducing the amount of foam in the inner cavity of the kettle (1), thereby greatly reducing the amount of bubbles generated by the material during the subsequent filtration process; the foam isolation screen (43) is used to abut the foam entering the ventilation channel (411), reducing the phenomenon of foam passing through the ventilation channel (411).

2. The preparation process of the super wear-resistant matte UV resin according to claim 1, characterized in that: Each of the bubble breaking components (34) includes a push plate (341), a plurality of preset rods (342) and a plurality of cutting ring plates (343); the push plate (341) is arranged on the connecting shaft (32); and a plurality of flow channels (3411) for allowing materials to pass through are provided through the push plate (341); one of the preset rods (342) is rotatably arranged in the side wall of a flow channel (3411), and all of the cutting ring plates (343) are respectively and spaced apart on all of the preset rods (342).

3. The preparation process of the super wear-resistant matte UV resin according to claim 2, characterized in that: The outer circumferential dimensions of adjacent cutting ring plates (343) increase or decrease gradually along the extending direction of the preset rod (342).

4. The preparation process of the super wear-resistant matte UV resin according to claim 3, characterized in that: The stirring device (3) further comprises a fixing assembly (35), wherein the fixing assembly (35) comprises a docking arc plate (351) and a locking bolt (352); the docking arc plate (351) is arranged on the push plate (341), and the locking bolt (352) is used to position the docking arc plate (351) on the connecting shaft (32).

5. The preparation process of the super wear-resistant matte UV resin according to claim 4, characterized in that: The bubble-inducing device (4) further comprises a positioning assembly (42), the positioning assembly (42) comprising a plurality of side extension plates (421), a plurality of stop screws (422) and a plurality of fastening nuts (423); the side extension plates (421) are arranged on the flow partition (41), and the kettle body (1) is provided with a plurality of sedimentation troughs (12) for the side extension plates (421) to be pressed into; one of the stop screws (422) is arranged in the side wall of a sedimentation trough (12), the stop screw (422) is passed through the side extension plate (421), and one of the fastening nuts (423) is threadedly connected to one of the stop screws (422), so that the side extension plate (421) is positioned in the side wall of the sedimentation trough (12).

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