Screening device for PVC auxiliaries
By designing a combined device of drying drum and screening screen, the problems of incomplete drying and screening in PVC additive production were solved, realizing continuous production and efficient screening of PVC additives and improving production efficiency.
Patent Information
- Application Number
- CN202423164651.2
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-12-21
- Publication Date
- 2025-12-09
- Estimated Expiration
- 2034-12-21
AI Technical Summary
In traditional PVC additive production, particles that are not thoroughly dried or screened cannot be effectively processed, resulting in some damp and caking additives that cannot be repeatedly processed, making continuous production impossible.
Design a sieving device for PVC additives, including a drying drum and a sieving screen. Through the combination of spiral blade drying, fine mesh sieving of the sieving screen and tubular chain conveyor, continuous drying and sieving of PVC additives can be achieved, avoiding manual intervention.
It enables continuous production of PVC additives, ensuring drying and sieving effects without requiring machine downtime. Large particles of additives can be extruded into fine particles without stopping the machine, thus improving production efficiency.
Smart Images
Figure CN223642252U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of sieving technology for PVC additives, and specifically to a sieving device for PVC additives. Background Technology
[0002] PVC, or polyvinyl chloride, is a polymer material obtained by the addition polymerization of vinyl chloride. It is the third most widely produced synthetic plastic polymer after polyethylene and polypropylene. PVC is an amorphous white powder with poor stability to light and heat, no fixed melting point, good mechanical properties, and excellent dielectric properties. PVC plastic formulations mainly consist of PVC resin and additives. Additives are further classified by function as: heat stabilizers, lubricants, processing modifiers, impact modifiers, fillers, anti-aging agents, and colorants. During the granulation process of PVC additive production, the resulting additive particles vary in size, thus requiring sieving.
[0003] In traditional PVC additive production, granular PVC additives are dried in drying equipment before screening. Some production lines have additional processes between the screening and drying equipment. Additive granules that are not thoroughly dried or screened cannot be processed again, inevitably resulting in some damp and clumped additive lumps. These additives can only be processed repeatedly by manual labor or other processes. Therefore, there will always be some PVC additives that do not meet the requirements and need to be processed repeatedly, making continuous production impossible.
[0004] In conclusion, the existing technology obviously has inconveniences and defects in practical use, so it is necessary to improve it. Utility Model Content
[0005] This invention addresses the shortcomings of the prior art by providing a sieving device for PVC additives, achieving the following objectives: after drying and sieving, PVC additives do not require manual intervention; large PVC additive particles are squeezed and ground finely without stopping the machine, and then dried and sieved again, thus achieving continuous production.
[0006] To solve the above technical problems, the present invention adopts the following technical solution: a sieving device for PVC additives, including a drying drum, wherein a spiral blade is fixed inside the drying drum;
[0007] A screening screen is installed directly below the outlet end of the drying drum. One side of the screening screen is hinged to one end of a connecting rod, and the other end of the connecting rod is hinged to the eccentric shaft of the drive wheel. The screening screen is mounted on a bracket via a linear slide rail.
[0008] The active roller and the driven roller are installed directly below the screening outlet.
[0009] A tubular chain conveyor is located directly below the driving roller and the driven roller, and the outlet of the tubular chain conveyor is directly above the inlet of the drying drum.
[0010] Furthermore, a gear ring is fixed in the middle of the drying drum, and the gear ring meshes with the drive gear for transmission.
[0011] Furthermore, annular tracks are fixed at both ends of the drying drum, and the annular tracks are tactilely connected to track wheels fixed on the support. One track wheel is installed on each side of the annular track.
[0012] Furthermore, the characteristic feature is that the inlet end of the screening sieve is wider than the outlet end.
[0013] Furthermore, the feature is that the inlet end of the sieve is higher than the outlet end above the ground.
[0014] Furthermore, baffles are fixed on both sides of the screening screen.
[0015] Furthermore, the driven roller is mounted parallel to and close to the driving roller on the bracket.
[0016] Furthermore, a finished product container is provided directly below the screening sieve.
[0017] Furthermore, an inlet baffle is fixed at the inlet end of the drying drum.
[0018] Compared with the prior art, the present invention, by adopting the above technical solution, has the following advantages:
[0019] Drying and screening are achieved on the drying drum and screening screen respectively. Large PVC additive particles are processed without manual intervention. The large PVC additive particles are squeezed into fine particles without stopping the machine. The tubular chain conveyor feeds the squeezed and ground PVC additives back into the drying drum and screening screen for drying and screening, thus realizing continuous production.
[0020] The present invention will now be described in detail with reference to the accompanying drawings and embodiments. Attached Figure Description
[0021] Figure 1 This is a front view of the present invention;
[0022] Figure 2 This is a left view of the present invention;
[0023] Figure 3 This is a schematic diagram of the structure of the drying drum in this utility model.
[0024] In the diagram, 1-inlet baffle, 2-drying drum, 3-spiral blade, 4-ring track, 5-gear ring, 6-drive gear, 7-track wheel, 8-screening screen, 9-motor 2, 10-driven roller, 11-drive roller, 12-baffle plate, 13-finished product container, 14-tube chain conveyor, 15-linear slide rail, 16-drive wheel, 17-connecting rod, 18-motor 1, 19-motor 3. Detailed Implementation
[0025] To provide a clearer understanding of the technical features, objectives, and effects of this utility model, the specific embodiments of this utility model are now described with reference to the accompanying drawings.
[0026] like Figures 1-3 As shown in the figure, this utility model provides a sieving device for PVC additives, including a drying drum 2, a spiral blade 3 fixed inside the drying drum 2, and a heating device inside the drying drum 2; annular tracks are fixed at both ends of the drying drum 2, and the annular tracks 4 are rotatably connected to track wheels 7 fixed on the support. The track wheels 7 are non-powered rollers, and one track wheel 7 is installed on each side of the annular track 4.
[0027] A screening sieve 8 is installed directly below the outlet end of the drying drum 2. The screening sieve 8 has a fine mesh structure, and baffle plates 12 are fixed on both sides of the screening sieve 8. One side of the screening sieve 8 is hinged to one end of a connecting rod 17, and the other end of the connecting rod 17 is hinged to the eccentric shaft of a drive wheel 16. The drive wheel 16 is fixedly connected to the drive shaft of a motor 9. The screening sieve 8 is mounted on a bracket via linear slide rails 15, one at the front end and one at the rear end of the bottom of the screening sieve 8. The direction of movement of the PVC additive inside the drying drum 2 is perpendicular to the direction of movement of the PVC additive on the screening sieve 8.
[0028] A drive roller 11 and a driven roller 10 are installed directly below the outlet end of the sieve 8. The driven roller 10 is installed parallel to and close to the drive roller 11. The drive roller 11 is driven by a motor 319. The drive roller 11 and the driven roller 10 are mounted on a bracket by a fixing rod.
[0029] A tubular chain conveyor 14 is provided directly below the driving roller 11 and the driven roller 10, and the outlet of the tubular chain conveyor 14 is directly above the inlet of the drying drum 2.
[0030] A gear ring 5 is fixed in the middle of the drying drum 2. The gear ring 5 meshes with the drive gear 6 for transmission. The drive gear 6 is fixedly connected to the drive shaft of the motor 18. The motor 18 is fixed on the bracket.
[0031] The inlet end of the screening sieve 8 is wider than the outlet end, and the inlet end of the screening sieve 8 is higher than the outlet end in terms of ground height.
[0032] A finished product container 13 is located directly below the screening sieve 8.
[0033] An inlet baffle 1 is fixed at the inlet end of the drying drum 2.
[0034] The working principle of this utility model:
[0035] The PVC additive is fed into the drying drum 2 through the inlet baffle 1. The motor 18 drives the drive gear 6 to rotate, which in turn drives the gear ring 5 to rotate, thus rotating the drying drum 2. The heating device in the drying drum 2 heats the inner wall of the drying drum 2. The spiral blades 3 inside the drying drum 2 cause the PVC additive to move forward while rotating, causing the moisture in the PVC additive to evaporate. The PVC additive falls from the outlet of the drying drum 2 onto the screening screen 8. The drive wheel 16 drives the screening screen 8 to reciprocate on the linear slide rail 15 through the eccentrically mounted connecting rod 17. The fine PVC additive passes through the fine mesh of the screening screen 8 and falls into the finished product container 13. The larger PVC additive particles continue to slide down the screening screen 8 and fall into the inlet of the tubular chain conveyor 14 after being squeezed by the drive roller 11 and the driven roller 10. The PVC additive falls from the outlet of the tubular chain conveyor 14 back into the inlet of the inlet baffle 1. Drying and screening are achieved on the drying drum 2 and the screening screen 8 respectively. Large PVC additive particles are processed without manual intervention. The large PVC additive particles are squeezed into fine particles without stopping the machine. The tubular chain conveyor 14 feeds the squeezed and ground PVC additives back into the structure for drying and screening, thus realizing continuous production.
[0036] The above description provides examples of the preferred embodiments of this utility model. Any aspects not detailed herein are common knowledge to those skilled in the art. The scope of protection of this utility model is determined by the claims. Any equivalent modifications based on the technical teachings of this utility model are also within the scope of protection of this utility model.
Claims
1. A sieving device for PVC additives, characterized in that: include Drying drum (2), with spiral blades (3) fixed inside the drying drum (2); A sieve (8) is provided directly below the outlet end of the drying drum (2). One side of the sieve (8) is hinged to one end of the connecting rod (17), and the other end of the connecting rod (17) is hinged to the eccentric shaft of the drive wheel (16). The sieve (8) is mounted on the bracket via a linear slide rail (15). The active roller (11) and the driven roller (10) are installed directly below the outlet end of the screening screen (8). A tubular chain conveyor (14) is provided directly below the driving roller (11) and the driven roller (10), and the outlet of the tubular chain conveyor (14) is directly above the inlet of the drying drum (2).
2. The sieving device for PVC additives according to claim 1, characterized in that, A gear ring (5) is fixed in the middle of the drying drum (2), and the gear ring (5) meshes with the drive gear (6) for transmission.
3. The sieving device for PVC additives according to claim 1, characterized in that, The drying drum (2) is fixed with an annular track (4) at both ends. The annular track (4) is tactilely connected to the track wheel (7) fixed on the bracket. One track wheel (7) is installed on each side of the annular track (4).
4. The sieving device for PVC additives according to claim 1, characterized in that, The inlet end of the sieve (8) is wider than the outlet end.
5. The sieving device for PVC additives according to claim 1, characterized in that, The inlet end of the sieve (8) is higher than the outlet end above the ground.
6. The sieving device for PVC additives according to claim 1, characterized in that, The screening sieve (8) is fixed with baffles (12) on both sides.
7. The sieving device for PVC additives according to claim 1, characterized in that, The driven roller (10) and the driving roller (11) are mounted parallel to each other on the bracket.
8. The sieving device for PVC additives according to claim 1, characterized in that, A finished product container (13) is provided directly below the screening sieve (8).
9. The sieving device for PVC additives according to claim 1, characterized in that, An inlet baffle (1) is fixed at the inlet end of the drying drum (2).