A re-dispersible latex powder shaker

Abstract

The utility model discloses a re-dispersible emulsion powder vibrating screen belongs to vibrating screen technical field. The device includes the casing and the sieve plate, the casing inside forms and has the screening chamber, the sieve plate is installed in the screening chamber, be provided with screening assembly in the screening chamber, the screening assembly includes the connecting rod and the sieve tray, the sieve tray is fixed in the connecting rod outer wall, the sieve tray top surface is coniform, the sieve tray top surface is inclined setting from the connecting rod axle center downward, the sieve tray is located above the sieve plate. The utility model discloses is used to solve the problem of low screening efficiency caused by the emulsion powder easy to accumulate and block on the screen in the prior art.

Description

Technical Field

[0001] This utility model relates to the field of vibrating screen technology, and in particular to a vibrating screen for redispersible latex powder. Background Technology

[0002] In the production and processing of latex powder, screening is a crucial process. Its purpose is to separate latex powder products that meet specific particle size requirements, which is a key step in ensuring the stability of the final product quality and the uniformity of particle size. High-performance redispersible latex powders have strict requirements for particle size distribution; therefore, efficient and precise screening equipment directly affects the application performance and market competitiveness of the product.

[0003] Currently, traditional vibrating screen equipment is widely used in this field. This type of equipment typically employs single-layer or multi-layer flat screens, relying on a motor-driven vibrator to generate vibration, causing the material to jump and move on the screen surface. Particles smaller than the screen aperture size pass through the screen, thus achieving grading. However, existing vibrating screens are gradually revealing several inherent defects when screening fine powders such as latex powder, which are prone to static electricity and have a certain degree of viscosity.

[0004] 1. Latex powder easily accumulates and clogs, resulting in low screening efficiency: Due to the adsorption between latex powder particles and its tendency to generate static electricity, the powder easily adheres and accumulates on the screen surface, forming a stagnant layer. This not only reduces the effective screening area but also significantly lowers screening efficiency and processing capacity. Furthermore, severe accumulation can quickly lead to screen clogging, preventing qualified powder from passing through the screen properly. This necessitates frequent machine shutdowns for manual cleaning, disrupting continuous production, increasing the workload of operators, and shortening the lifespan of the screen.

[0005] 2. Inconvenient screen replacement and poor adaptability: Most existing vibrating screens use welding, bolt fastening and other fixed installation methods for the screens. When production needs change, such as adjusting the particle size of latex powder, it is necessary to replace the screens with screens of different apertures, disassemble the shell and remove multiple fixed parts. The operation steps are cumbersome and time-consuming, and it is impossible to respond quickly to the adjustment of production process, which reduces the adaptability of the equipment to multiple specifications of products.

[0006] Therefore, developing a vibrating screen specifically for redispersible latex powder that can effectively prevent screen clogging, improve screening efficiency, and is easy to maintain has become a technical problem that urgently needs to be solved in this field. Utility Model Content

[0007] This invention provides a redispersible latex powder vibrating screen, which can solve the problem of low screening efficiency caused by the easy accumulation and clogging of latex powder on the screen in the prior art.

[0008] A vibrating screen for redispersible latex powder includes a shell and a screen plate, wherein a screening chamber is formed inside the shell, and the screen plate is installed in the screening chamber. The screening chamber is equipped with a screening assembly, which includes a connecting rod and a screen plate. The screen plate is fixedly sleeved on the outer wall of the connecting rod. The top surface of the screen plate is conical and is inclined downward from the axis of the connecting rod. The screen plate is located above the screen plate.

[0009] Furthermore, the surface of the sieve disc is provided with a plurality of first sieve holes, and the sieve plate is provided with a plurality of second sieve holes, wherein the diameter of the first sieve holes is larger than the diameter of the second sieve holes.

[0010] Furthermore, the screening assembly also includes a scraper, which is fixed to the bottom outer wall of the connecting rod, and the bottom surface of the scraper is in contact with the top surface of the screen plate and can slide relative to it.

[0011] Furthermore, the screening assembly also includes a motor located on the top wall of the housing, and the output end of the motor is connected to the top end of the connecting rod.

[0012] Furthermore, the housing includes a first cylindrical body, a second cylindrical body detachably connected to the first cylindrical body, and a material hopper connected to the bottom of the second cylindrical body; The material collection bin has a material collection chamber inside, the first cylinder has a first inner cavity inside, and the second cylinder has a second inner cavity inside. The material collection chamber, the first inner cavity, and the second inner cavity are connected to form the screening chamber.

[0013] Furthermore, a feed hopper communicating with the screening chamber is provided at the top of the shell.

[0014] Furthermore, the bottom of the material hopper is funnel-shaped, and an outlet communicating with the material hopper is provided on the bottom wall of the material hopper.

[0015] Furthermore, the discharge port is slidably provided with an opening and closing baffle.

[0016] Furthermore, it also includes a vibration assembly, which includes a vibrator disposed on the side wall of the housing and a vibration seat disposed at the bottom of the housing, and a plurality of springs are connected between the vibration seat and the housing.

[0017] Furthermore, a slot is provided on one side of the housing, and the sieve plate is detachably mounted on the slot so as to extend into the screening chamber.

[0018] The beneficial effects of this utility model are: This utility model provides a redispersible latex powder vibrating screen, including a shell, a screen plate, and a screening assembly disposed in a screening chamber inside the shell. The screening assembly includes a connecting rod and a screen disc fixed to its outer wall. The top surface of the screen disc is conical and is inclined downward from the axis of the connecting rod, and the screen disc is located above the screen plate.

[0019] By setting the top surface of the screen disc as a cone-shaped structure that slopes downward from the connecting rod axis, the material can slide down its slope when it falls at the axis and pass through the screen holes to the next layer during the sliding process. This increases the material's travel distance and greatly improves the accumulation of material in the center of the screen disc, thereby effectively improving the efficiency and processing capacity of the initial screening.

[0020] The screen disc is located above the screen plate, forming a two-stage screening space from top to bottom. After initial dispersion and coarse screening by the conical screen disc, the material can fall more evenly onto the screen plate below for fine screening. This screening method optimizes the screening process and significantly improves the overall screening efficiency and accuracy. Attached Figure Description

[0021] Figure 1 A schematic diagram of the overall structure of a redispersible latex powder vibrating screen provided by this utility model; Figure 2 A cross-sectional structural diagram of a redispersible latex powder vibrating screen provided by this utility model; Figure 3 This is a schematic diagram of the sieving component structure in a vibrating screen for redispersible latex powder provided by this utility model.

[0022] Explanation of reference numerals in the attached figures: 1. Shell; 2. Screen plate; 3. Screening assembly; 4. Feed hopper; 5. Opening and closing baffle; 6. Vibrating seat; 7. Spring; 11. First cylinder; 12. Second cylinder; 13. Gathering bin; 14. Insertion groove; 15. Gathering chamber; 31. Motor; 32. Connecting rod; 33. Screen plate; 34. Scraper. Detailed Implementation

[0023] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0024] like Figures 1 to 3As shown in the figure, the present invention provides a redispersible latex powder vibrating screen, including a shell 1, a sieve plate 2, a sieving component 3 and a vibrating component, wherein a sieving chamber is formed inside the shell 1, and the sieve plate 2 and the sieving component 3 are both installed in the sieving chamber, and the various parts work together to achieve efficient classification and sieving of latex powder.

[0025] Specifically, the housing 1 features a layered, detachable design, comprising a first cylinder 11, a second cylinder 12, and a material collection hopper 13 connected sequentially from top to bottom. The first cylinder 11 and the second cylinder 12 are detachably connected by flange bolts, and the bottom of the second cylinder 12 is welded to the material collection hopper 13. The material collection hopper 13 contains a material collection chamber 15, the first cylinder 11 contains a first inner cavity, and the second cylinder 12 contains a second inner cavity. The material collection chamber 15, the first inner cavity, and the second inner cavity are interconnected to form a screening chamber. The flange connection between the first cylinder 11 and the second cylinder 12 allows for quick disassembly and opening of the screening chamber, facilitating the cleaning of residual latex powder on the screen plate 33, scraper 34, and screen plate 2, and also facilitating the maintenance of the screening assembly 3.

[0026] In addition, a feed hopper 3 is provided on one side of the top of the first cylinder 11, and its lower opening is connected to the screening chamber inside the first cylinder 11; the bottom of the material hopper 13 is shaped like an inverted funnel, and a discharge port is provided at the center of the bottom of the material hopper 13. This design allows the latex powder after fine screening to naturally concentrate towards the discharge port, avoiding residue accumulation in the hopper; a horizontal sliding groove is provided on the outside of the discharge port, and an opening and closing baffle 5 is installed in the groove. The opening and closing degree of the discharge port can be controlled by pulling the baffle, thereby controlling the discharge speed, eliminating the need for frequent start-stop of the equipment and improving production continuity.

[0027] Specifically, a horizontal insertion groove 14 is provided on one side of the bottom of the second cylinder 12. The sieve plate 2 is detachably mounted on the insertion groove 14 and horizontally inserted into the screening chamber inside the second cylinder 12 through the insertion groove 14. At the same time, the end of the sieve plate 2 away from the insertion groove 14 is engaged with the inner wall of the second cylinder 12 to prevent the sieve plate 2 from shifting during vibration. Compared with the traditional bolt-fixed sieve plate 2, the insertion design allows for quick replacement of the sieve plate 2 without disassembling the housing 1. It can be flexibly replaced according to the screening particle size requirements of different latex powders, and has strong adaptability.

[0028] like Figure 2 and Figure 3As shown, the screening assembly 3 is located at the central axis of the screening chamber and includes a motor 31, a connecting rod 32, a screen plate 33, and a scraper 34. The motor 31 is fixed to the center of the top wall of the first cylinder 11 by bolts. The output shaft of the motor 31 is vertically downward and extends through the top wall of the first cylinder 11 into the screening chamber. The top end of the connecting rod 32 is fixed coaxially with the output shaft of the motor 31, and the bottom end extends to the screen plate 2 inside the second cylinder 12. The outer wall of the connecting rod 32 is fixed to the screen plate 33 and the scraper 34 by welding to achieve synchronous rotation. The screen plate 33 is fixedly sleeved on the outer wall of the connecting rod 32 and located above the screen plate 2. The top surface of the screen plate 33 is conical and tilts downward from the axis of the connecting rod 32 to the edge at an angle of 10°. Multiple first screen holes are evenly opened on the surface of the screen plate 33, and multiple second screen holes are opened on the screen plate 2. The diameter of the first screen holes is larger than the diameter of the second screen holes. The scraper 34 is made of silicone and has 4 of them. They are evenly distributed and fixed to the bottom outer wall of the connecting rod 32. The bottom surface of the scraper 34 is completely attached to the top surface of the screen plate 2 and can slide relative to each other. The conical and inclined structure of the top surface of the sieve disc 33 allows the latex powder, after falling from the feed hopper 3 into the center of the sieve disc 33, to quickly disperse towards the edge of the sieve disc 33 along the inclined surface under the combined action of its own gravity and the centrifugal force of the rotating connecting rod 32, preventing material accumulation in the center of the sieve disc 33. Simultaneously, the dispersed material can more evenly cover the surface of the sieve disc 33, fully utilizing the first sieve hole for coarse screening and improving coarse screening efficiency. The silicone scraper 34 can both tightly adhere to the top surface of the sieve plate 2 to move the material and avoid scratching damage to the sieve plate 2 by the metal scraper 34, extending the service life of the sieve plate 2. At the same time, the elastic fit reduces the gap between the scraper 34 and the sieve plate 2, preventing latex powder from leaking through the gap and ensuring that all materials are screened by the sieve plate 2.

[0029] like Figure 1 and Figure 2 As shown, the system includes a vibration assembly located on the outside of the housing 1 to enhance the screening effect. The assembly includes a vibrator and a vibration seat 6. The vibrator, not shown in the figure, is located on the side wall of the housing 1 and is connected to an external control system via wires, allowing for frequency adjustment. The vibration seat 6 is located directly below the material hopper 13 to support the entire device. Multiple springs 7 connect the vibration seat 6 to the housing 1. In this embodiment, four steel cylindrical helical compression springs 7 are used. The top of each spring 7 is welded to a spring seat 7 at the bottom of the material hopper 13, and the bottom is welded to a spring seat 7 on the top surface of the vibration seat 6, achieving an elastic connection between the housing 1 and the vibration seat 6. This allows for efficient transmission of vibrations generated by the vibrator to the screen disc 33 and screen plate 2, while also absorbing the impact force during operation, reducing vibration transmission to the ground, and lowering operating noise.

[0030] The working principle of this utility model is as follows.

[0031] According to the particle size requirements of the latex powder to be screened, select the sieve plate 2 with the corresponding aperture and install and fix the sieve plate 2 through the insertion groove 14.

[0032] During operation, the motor 31 and vibrator are started. The redispersible latex powder to be screened is fed into the equipment through the feed hopper 3 and falls onto the rotating conical screen 33 for the first stage of coarse screening. The rotating screen 33 uses centrifugal force and an inclined surface to disperse the latex powder to the edge. During the dispersion process, larger coarse particles larger than the diameter of the first screen hole are trapped on the surface of the screen 33, while smaller particles pass through the first screen hole and fall onto the screen plate 2 inside the second cylinder 12. The latex powder falling onto the screen plate 2 is dispersed under the vibration of the vibrator. At the same time, the rotating scraper 34 moves the material in real time to prevent the material from accumulating on the screen plate 2 or clogging the second screen hole. Even smaller qualified particles smaller than the diameter of the second screen hole pass through the screen plate 2 and fall into the lower aggregate bin 13. Medium particles with a particle size between the diameter of the first and second screen holes are trapped on the screen plate 2. After screening, the screen plate 2 can be removed to collect these particles. Finally, the qualified fine powder falls into the aggregate bin 13 and is collected through the bottom outlet. The discharge speed is controlled by pulling the opening and closing baffle 5 of the outlet.

[0033] The embodiments of this utility model have been described in detail above, but the content described is only a preferred embodiment of this utility model and should not be considered as limiting the scope of implementation of this utility model. All equivalent changes and improvements made in accordance with the claims of this utility model should still fall within the patent coverage of this utility model.

Claims

1. A vibrating screen for redispersible latex powder, comprising a housing (1) and a sieve plate (2), wherein a sieving chamber is formed inside the housing (1), and the sieve plate (2) is installed in the sieving chamber, characterized in that: The screening chamber is provided with a screening component (3), which includes a connecting rod (32) and a screen plate (33). The screen plate (33) is fixedly sleeved on the outer wall of the connecting rod (32). The top surface of the screen plate (33) is conical. The top surface of the screen plate (33) is inclined downward from the axis of the connecting rod (32). The screen plate (33) is located above the screen plate (2).

2. The redispersible latex powder vibrating screen as described in claim 1, characterized in that, The sieve disc (33) has a plurality of first sieve holes on its surface, and the sieve plate (2) has a plurality of second sieve holes, wherein the diameter of the first sieve holes is greater than the diameter of the second sieve holes.

3. The redispersible latex powder vibrating screen as described in claim 1 or 2, characterized in that, The screening assembly (3) also includes a scraper (34), which is fixed to the bottom outer wall of the connecting rod (32), and the bottom surface of the scraper (34) is attached to the top surface of the screen plate (2) and can slide relative to each other.

4. The redispersible latex powder vibrating screen as described in claim 3, characterized in that, The screening assembly (3) also includes a motor (31) located on the top wall of the housing (1), and the output end of the motor (31) is connected to the top end of the connecting rod (32).

5. The redispersible latex powder vibrating screen as described in claim 1, characterized in that, The housing (1) includes a first cylinder (11), a second cylinder (12) detachably connected to the first cylinder (11), and a material hopper (13) connected to the bottom of the second cylinder (12). The material collection bin (13) has a material collection cavity (15) inside, the first cylinder (11) has a first inner cavity inside, and the second cylinder (12) has a second inner cavity inside. The material collection cavity (15), the first inner cavity, and the second inner cavity are connected to form the screening cavity.

6. The redispersible latex powder vibrating screen as described in claim 1 or 5, characterized in that, The top of the shell (1) is provided with a feed hopper (4) that communicates with the screening chamber.

7. The redispersible latex powder vibrating screen as described in claim 5, characterized in that, The bottom of the material hopper (13) is funnel-shaped, and the bottom wall of the material hopper (13) is provided with a discharge port that communicates with the material chamber (15).

8. The redispersible latex powder vibrating screen as described in claim 7, characterized in that, The discharge port is provided with a slidable opening and closing baffle (5).

9. The redispersible latex powder vibrating screen as described in claim 1, characterized in that, It also includes a vibration assembly, which includes a vibrator located on the side wall of the housing (1) and a vibration seat (6) located at the bottom of the housing (1), and a plurality of springs (7) are connected between the vibration seat (6) and the housing (1).

10. The redispersible latex powder vibrating screen as described in claim 1, characterized in that, The housing (1) has an insertion groove (14) on one side, and the sieve plate (2) is detachably mounted on the insertion groove (14) so ​​as to extend into the sieving chamber.

Images