PVC particle screening device

Abstract

The utility model relates to the technical field of PVC particle screening, in particular to a PVC particle screening device which comprises a box body, a screening mechanism for screening PVC particles and a cooling mechanism for cooling before screening. The screening mechanism is composed of a motor, an auger for conducting synchronous stirring during screening, a screening net and a cam for knocking the screening net. The screening net is elastically connected to the interior of the box body through a spring; the packing auger is rotationally mounted above the screening net; the cam is rotationally mounted below the screening net; and the motor drives the auger and the cam to rotate in sequence. According to the PVC particle screening device, the screening mechanism is arranged, when the motor rotates, an auger and a cam rotate synchronously, on one hand, PVC particles at the upper end of the screening net are stirred through the auger, and the screening efficiency is improved; and on the other hand, the screening net is vibrated through the cam, and the PVC particles are prevented from blocking holes of the screening net to cause blockage.

Description

Technical Field

[0001] The utility model relates to the technical field of PVC particle screening, and specifically relates to a PVC particle screening device. Background Art

[0002] PVC particles are the base materials (basic raw materials) for the molding of polyvinyl chloride plastics. In actual molding, other auxiliary materials need to be added. PVC (polyvinyl chloride) has chemical and physical properties. Rigid PVC is one of the most widely used plastic materials. PVC material is a non-crystalline material. In actual use, stabilizers, lubricants, auxiliary processing agents, colorants, impact modifiers and other additives are often added to PVC materials.

[0003] The patent application number is CN202020569664.0, a vibrating sieve device for PVC particles, which includes a base and a material trough. The material trough includes a material receiving tray and a sieve tray that are interconnected. A support is provided on the base. A barrier rod for preventing material accumulation is placed at the connection between the material receiving tray and the sieve tray. Both ends of the barrier rod in the length direction are connected with flexible connectors, and one end of the flexible connector away from the barrier rod is connected to the support. The utility model has the advantage of reducing the accumulation of PVC particles on the sieve tray to improve the screening effect.

[0004] This patent can indeed achieve a good screening effect. However, after the production of PVC particles, there is still a certain temperature remaining on the surface. Secondly, heat will also be generated due to factors such as friction and extrusion, resulting in an increase in the particle temperature. Therefore, the high-temperature PVC particles may deform due to thermal expansion during the screening process, thereby affecting the screening accuracy and screening efficiency of the particles.

[0005] Therefore, it is necessary to provide a new technical solution to overcome the above defects. Summary of the Utility Model

[0006] The purpose of the utility model is to provide a PVC particle screening device that can effectively solve the above technical problems.

[0007] To achieve the purpose of the utility model, the following technical solutions are adopted:

[0008] A PVC particle screening device includes: a box body, a screening mechanism for screening PVC particles, and a cooling mechanism for cooling before screening;

[0009] The screening mechanism consists of a motor, a auger for synchronous stirring during screening, a screening mesh, and a cam for knocking on the screening mesh; the screening mesh is elastically connected to the inside of the box body through a spring; the auger is rotatably installed above the screening mesh; the cam is rotatably installed below the screening mesh; the motor drives the auger and the cam to rotate in sequence.

[0010] Furthermore, the rotating end of the cam is connected to the rotating end of the auger through a connecting mechanism.

[0011] Furthermore, the cooling mechanism consists of a refrigeration chip, heat dissipation fins for cooling the refrigeration chip, and an air pump; the refrigeration chip is fixedly installed inside the box above the auger; the heat dissipation fins are fixedly installed at the heating end of the refrigeration chip; the intake end of the air pump is connected to the inside of the box near the refrigerating end of the refrigeration chip through a pipe; the outlet end of the air pump is connected to the inside of the box near the heating end of the refrigeration chip through a pipe.

[0012] Furthermore, the cooling mechanism is also provided with a heat dissipation fan for driving the air flow at the heating end of the refrigeration plate; the heat dissipation fan is synchronously rotationally connected to the cam and the auger through a connecting mechanism.

[0013] Compared with the prior art, the present utility model has the following beneficial effects:

[0014] 1. In a PVC particle screening device of the present utility model, by setting a screening mechanism, when the motor rotates, the auger and the cam rotate synchronously. On the one hand, the PVC particles at the upper end of the screening net are stirred by the auger to improve the screening efficiency; on the other hand, the screening net is vibrated by the cam to prevent the PVC particles from blocking the mesh holes of the screening net.

[0015] 2. In a PVC particle screening device of the present utility model, by setting a cooling mechanism, the PVC particle screen transported into the box is cooled by the refrigerating end of the heat dissipation fins; and then the air at the refrigerating end is pumped by the air pump into the heating end of the refrigeration chip for cooling, so that the cooling effect is better. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] The drawings are used to provide a further understanding of the present utility model, and constitute a part of the specification. They are used together with the embodiments of the present utility model to explain the present utility model, and do not constitute a limitation to the present utility model.

[0017] Figure 1 is a schematic structural diagram of a PVC particle screening device of the present utility model;

[0018] Figure 2 is a front view of a PVC particle screening device of the present utility model;

[0019] Figure 3 is an internal cross-sectional view of a PVC particle screening device of the present utility model;

[0020] Figure 4 is a schematic structural diagram of the screening mechanism in the present utility model;

[0021] Figure 5This is a schematic structural diagram of the cooling mechanism in the present utility model.

[0022] In the figure: 1 is the box body; 2 is the screening mechanism; 3 is the cooling mechanism; 21 is the motor; 22 is the auger; 23 is the screening mesh; 24 is the spring elasticity; 25 is the cam; 26 is the connecting mechanism; 31 is the refrigeration chip; 32 is the heat dissipation fin; 33 is the air pump; 331 is the air inlet end; 332 is the air outlet end; 333 is the heat dissipation fan. Specific embodiments

[0023] In order to make the purposes, technical solutions and advantages of the embodiments of the present utility model clearer, the technical solutions in the embodiments of the present utility model will be clearly and completely described below. Obviously, the described embodiments are partial embodiments of the present utility model, rather than all embodiments.

[0024] In the description of the present utility model, it should be understood that the terms "center", "transverse", "longitudinal", "front", "rear", "left", "right", "upper", "lower", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc. indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings. It is only for the convenience of describing the present utility model and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus cannot be understood as a limitation on the protection scope of the present utility model. When a mechanism is referred to as "fixed to" another mechanism, it can be directly on the other mechanism or there can also be an intermediate mechanism. When a mechanism is considered to be "connected" to another mechanism, it can be directly connected to the other mechanism or there may be an intermediate mechanism at the same time. When a mechanism is considered to be "disposed on" another mechanism, it can be directly disposed on the other mechanism or there may be an intermediate mechanism at the same time. The terms "vertical", "horizontal", "left", "right" and similar expressions used herein are only for the purpose of illustration.

[0025] As Figures 1 to 5 shown, a PVC particle screening device of the present utility model includes: the box body 1 in the figure, the screening mechanism 2 for screening PVC particles, and the cooling mechanism 3 for cooling before screening;

[0026] This patent also has a feed hopper for feeding PVC particles, a first discharge port and a second discharge port for discharging PVC particles. When PVC particles need to be screened, the PVC particles are poured into the interior of the box (Figure 1) through the feed port; the PVC particles are stirred and screened by the screening mechanism; at the same time, the PVC particles poured into the interior of the box (Figure 1) are cooled by the cooling mechanism 3; finally, the PVC particles passing through the screening mesh 23 are discharged through the first discharge port; the PVC particles that do not pass through the screening mesh 23 are discharged through the second discharge port. The screening of PVC particles is completed through the above mechanisms; this patent can be used in combination with the extrusion equipment for PVC particles.

[0027] The screening mechanism 2 is composed of a motor 21, a auger 22 for synchronous stirring during screening, a screening mesh 23, and a cam 25 for knocking on the screening mesh 23; the screening mesh 23 is elastically connected to the interior of the box (Figure 1) through a spring 24; the auger 22 is rotatably installed above the screening mesh 23; the cam 25 is rotatably installed below the screening mesh 23; the motor 21 drives the auger 22 and the cam 25 to rotate in sequence; the rotating end of the cam 25 is connected to the rotating end of the auger 22 through a connecting mechanism 26; when the PVC particles are poured into the interior of the box (Figure 1) through the feed port, the motor 21 is started, and the auger and the cam 25 are driven to rotate synchronously through the connecting mechanism 26. It should be noted here that in this embodiment, the connecting mechanism 26 is a belt drive mechanism, and of course, a gear drive mechanism can also be selected; through the rotation of the auger 22, the PVC particles at the upper end of the screening mesh 23 are stirred, which can not only effectively prevent the adhesion between particles, but also ensure the uniform distribution of particles on the screening mesh 23, avoiding particle accumulation and blocking of the screen; at the same time, the continuous rotation of the auger 22 can also promote the contact between the particles and the screen, helping to better screen out the particles that meet the requirements and further improving the screening quality; then, the cam 25 vibrates the screening mesh 23 to prevent the PVC particles from blocking the holes of the screening mesh 23; thus, the PVC particles are well screened.

[0028] The cooling mechanism 3 consists of a Peltier element 31, heat dissipation fins 32 for cooling the Peltier element 31, and an air pump 33; the Peltier element 31 is fixedly installed inside the box body shown in Figure 1 above the auger 22; the heat dissipation fins 32 are fixedly installed at the heating end of the Peltier element 31; the intake end 331 of the air pump 33 is connected to the inside of the box body shown in Figure 1 near the cooling end of the Peltier element 31 through a pipe fitting; the outlet end 332 of the air pump 33 is connected to the inside of the box body shown in Figure 1 near the heating end of the Peltier element 31 through a pipe fitting; when it is necessary to cool the PVC particles through the above mechanism, a cold source is transported from the cooling end of the Peltier element 31 to the PVC particles inside the box body shown in Figure 1; thus, the temperature of the particles can be rapidly reduced during the cooling process, preventing the particles from sticking or deforming due to high temperature, thereby ensuring the stability and screening efficiency of the particles; then, the air cooled at the cooling end is transported by the air pump 33 to the heating end of the Peltier element 31 for cooling; by fixedly installing the heat dissipation fins 32 at the heating end of the Peltier element 31, the contact area with the air is effectively increased, and when the air cooled at the cooling end is transported by the air pump 33 to the heating end of the Peltier element 31, it can better contact with the cold air through the heat dissipation fins 32, greatly improving the cooling effect.

[0029] When the air at the cooling end of the Peltier element 31 is pumped to the heating end of the Peltier element 31 by the air pump 33, since the PVC particles are stirred by the auger, the fine dust attached to the surface of the PVC particles may be diffused inside the box body shown in Figure 1, and when it is pumped by the air pump 33, it will be blown to the heating end of the Peltier element 31 along the pipeline; as an extended expansion of this patent, by providing a dust removal box at the intake end 331 of the air pump 33, when the air inside the box body shown in Figure 1 is extracted, it will be dust-removed through the dust removal box; then the dust-removed air is introduced to the heating end of the Peltier element 31; thus, it can not only clean the dust inside the box body shown in Figure 1, but also cool the heating end of the Peltier element 31; it should be noted here that the dust removal box in this patent can be a simple filter screen dust removal mechanism, and this structure is prior art, so it will not be elaborated here too much.

[0030] The cooling mechanism 3 is also provided with a cooling fan 333 that drives the air flow at the heating end of the cooling plate; the cooling fan 333 is synchronously rotationally connected to the cam 25 and the auger 22 through a connecting mechanism 26; thus, when the motor 21 rotates, the cooling fan 333 rotates synchronously with the cam 25 and the auger 22; when the cooling fan 333 rotates, the air at the heating end of the cooling plate is exhausted, resulting in a better air flow effect at the heating end of the cooling plate; thus, a good heat dissipation effect is achieved.

[0031] All the standard parts used in the present utility model can be purchased from the market. The special-shaped parts can be customized according to the descriptions in the specification and the attached drawings. The specific connection methods of all parts adopt conventional means such as bolts, rivets, and welding that are mature in the prior art. The machinery, parts, and equipment all adopt conventional models in the prior art. In addition, the circuit connection adopts the conventional connection method in the prior art, which will not be elaborated here. The content not described in detail in this specification belongs to the prior art well-known to those skilled in the art.

[0032] It should be understood that those of ordinary skill in the art can make improvements or transformations according to the above description, and all such improvements and transformations shall fall within the protection scope of the appended claims of the present utility model.

Claims

1. A PVC particle screening device, characterized in that, Including: A box body, a screening mechanism for screening PVC particles, and a cooling mechanism for cooling before screening; The screening mechanism consists of a motor, an auger for synchronous stirring during screening, a screening mesh, and a cam for knocking on the screening mesh; the screening mesh is elastically connected to the inside of the box body through a spring; the auger is rotatably installed above the screening mesh; the cam is rotatably installed below the screening mesh; the motor drives the auger and the cam to rotate in sequence.

2. The PVC particle screening device according to claim 1, characterized in that, The rotating end of the cam is connected to the rotating end of the auger through a connecting mechanism.

3. A PVC particle screening device according to claim 1, characterized in that, The cooling mechanism consists of a refrigeration sheet, heat dissipation fins for cooling the refrigeration sheet, and an air pump; the refrigeration sheet is fixedly installed inside the box body above the auger; the heat dissipation fins are fixedly installed at the heating end of the refrigeration sheet; the air inlet end of the air pump is connected to the inside of the box body near the refrigeration end of the refrigeration sheet through a pipe; the air outlet end of the air pump is connected to the inside of the box body near the heating end of the refrigeration sheet through a pipe.

4. The PVC particle screening device according to claim 3, wherein, The cooling mechanism further includes a heat dissipation fan for driving the air flow at the heating end of the refrigeration plate; the heat dissipation fan is synchronously rotationally connected to the cam and the auger through a connecting mechanism.

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