Cutting mechanism for PVC granulation equipment

Abstract

The utility model relates to the technical field of PVC (polyvinyl chloride) granulation equipment, in particular to a cutting mechanism for PVC granulation equipment, which comprises a main pipe and two branch pipes symmetrically communicated with the main pipe, the two branch pipes are respectively provided with a discharge port in opposite directions, the discharge ports are connected with hole discs, the cutting mechanism is arranged between the two hole discs, and the cutting mechanism is connected with the main pipe. The cutting mechanism comprises cutting knives driven by a motor to rotate, cutting edges of the cutting knives can make contact with or be separated from the surface of the hole disc, the distance between the two cutting knives is variable, an airflow blowing device is arranged above the cutting knives, and the cutting knives and the airflow blowing device can move to the position above the branch pipe. According to the utility model, the opposite double discharge ports are arranged, so that the discharge quantity is large and concentrated; the particles which are cut in an accelerated mode are pushed to fall through high-speed airflow, the particles are prevented from being attached to the cutting mechanism, and meanwhile drying and cooling of the particles are accelerated; the particle discharging length can be adjusted, and particles with two lengths can be cut at the same time; the blade of the cutting knife is in close contact with the hole disc.

Description

Technical Field

[0001] This utility model relates to the field of PVC granulation equipment technology, and in particular to a cutting mechanism for PVC granulation equipment. Background Technology

[0002] Polyvinyl chloride (PVC) is a widely used plastic material, and granulation is a crucial step in its production process, facilitating subsequent storage, transportation, and molding. After PVC material is extruded into strips by an extruder, it needs to be cut into granules of a specified size by a cutting mechanism. Existing PVC granulation equipment has several shortcomings in its cutting mechanisms, such as low cutting efficiency, difficulty in controlling granule length, and the tendency for material to adhere to the discharge port and scatter, increasing production costs and equipment downtime. Therefore, it is necessary to develop a new cutting mechanism for PVC granulation equipment to overcome the deficiencies of existing technology. Summary of the Invention

[0003] The purpose of this invention is to provide a novel cutting mechanism for PVC granulation equipment, which has high working efficiency, smooth material cutting and feeding, and adjustable material length.

[0004] To solve the above-mentioned technical problems, the technical solution adopted by this utility model is as follows:

[0005] A cutting mechanism for a PVC granulation equipment includes a main pipe and two branch pipes symmetrically connected to the main pipe. Each of the two branch pipes has a discharge port facing each other. The discharge ports are connected to perforated plates. A cutting mechanism is arranged between the two perforated plates. The cutting mechanism includes a cutting blade driven to rotate by a motor. The cutting blade can contact or separate from the surface of the perforated plate. The distance between the two cutting blades is variable. An airflow blowing device is arranged above the cutting blade. Both the cutting blade and the airflow blowing device can be moved above the branch pipes.

[0006] Furthermore, the cutting mechanism includes a bracket, one end of which is hinged to the main pipe, and the other end is provided with a fixed slide. Sliders are provided on both sides of the fixed slide and are movably connected thereto. An inflatable elastic airbag is provided between the two slides, and a rotary motor is connected to the slide.

[0007] Furthermore, the rotating shaft of the rotary motor is fixed to the cutting blade, and the two rotary motors are arranged back to back with their rotation axes coinciding.

[0008] Furthermore, a power telescopic rod is provided between the bracket and the main pipe. When the power telescopic rod extends, it causes the bracket to rise based on the hinge axis with the main pipe.

[0009] Furthermore, the branch pipe is provided with an inspection port, and the inspection port is connected to a detachable inspection cover.

[0010] Furthermore, the elastic airbag is connected to a compressed air supply device via a hose and a valve.

[0011] Furthermore, the airflow blowing device is a fan or a pipe connected to the fan, with its air outlet facing the cutting blade.

[0012] Furthermore, the perforated plate is provided with several discharge holes that connect the inside of the branch pipe to the outside.

[0013] The beneficial effects of adopting the technical solution of this utility model are:

[0014] This utility model discloses a cutting mechanism for a PVC granulation equipment with a reasonable structure. It features opposing dual discharge ports to achieve a large and concentrated discharge volume, preventing the cut granules from scattering. High-speed airflow propels the cut PVC granules to fall more quickly, preventing them from adhering to the cutting mechanism and also accelerating the drying and cooling of the granules. It is equipped with two individually adjustable rotary motors, allowing for adjustable granule discharge length and simultaneous cutting of two different granule lengths. Furthermore, it ensures close contact between the cutting blade and the perforated plate, guaranteeing the quality of the cut granules. Attached Figure Description

[0015] To more clearly illustrate the technical solutions of the embodiments of this utility model, the drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0016] Figure 1 This is a three-dimensional structural diagram of the present invention;

[0017] Figure 2 for Figure 1 Enlarged view of point A in the middle;

[0018] Figure 3 for Figure 1 Enlarged view of point B in the middle;

[0019] Figure 4 This is a front structural diagram of the present invention;

[0020] Figure 5 for Figure 4 Enlarged view of point C in the middle;

[0021] In the diagram: 1. Main pipe; 2. Branch pipe; 2a. Discharge port; 2b. Inspection cover; 3. Perforated plate; 4. Cutting mechanism; 4a. Cutting blade; 4b. Support; 4c. Fixed slide; 4d. Slider; 4e. Elastic airbag; 4f. Rotary motor; 5. Airflow blowing device; 6. Power telescopic rod. Detailed Implementation

[0022] The present invention will now be described in further detail with reference to the accompanying drawings. These drawings are simplified schematic diagrams, illustrating only the basic structure of the present invention. Therefore, they only show the components relevant to the present invention and should not limit the scope of protection of the present invention.

[0023] Please see Figures 1-5 A cutting mechanism for PVC granulation equipment includes a main pipe 1 and two branch pipes 2 symmetrically connected to the main pipe 1. The main pipe 1 is used to connect with the granulator to receive heated and molten PVC. The diameter of the main pipe 1 is larger than that of the branch pipes 2. Each of the two branch pipes 2 is provided with a discharge port 2a facing each other. The opposing double discharge ports realize a large and concentrated discharge volume, which is not easy to splash everywhere. The discharge port 2a is connected to a perforated plate 3, which has several discharge holes that connect the inside of the branch pipe 2 to the outside. A cutting mechanism 4 is set between two perforated plates 3. The cutting mechanism 4 includes a cutting blade 4a driven by a motor to rotate. The cutting blade 4a can contact or separate from the surface of the perforated plate 3. When the cutting blade contacts the surface of the perforated plate 3 and rotates, it can cut the long strip of material at the perforated plate 3 into fine particles. The cut fine particles fall freely. At the same time, an airflow blowing device 5 is set above the cutting blade 4a. The airflow blowing device 5 is a fan or a pipe connected to the fan. Its air outlet faces the cutting blade 4a. The high-speed airflow pushes the cut PVC particles to fall more quickly, preventing them from adhering to the cutting mechanism. It also has the function of accelerating the drying and cooling of the particles.

[0024] Specifically, to enable the cutting blade 4a and the airflow blowing device 5 to be movable above the branch pipe 2 and the spacing between the two cutting blades 4a to be variable, the cutting mechanism 4 includes a bracket 4b. One end of the bracket 4b is hinged to the main pipe 1, and the other end is provided with a fixed slide 4c. A power telescopic rod 6 is provided between the bracket 4b and the main pipe 1. When the power telescopic rod 6 extends, it drives the bracket 4b to rise based on the hinge axis with the main pipe 1, and vice versa. Slider blocks 4d are provided on both sides of the fixed slide 4c and are movably connected to it. An elastic airbag 4e is provided between the two sliders 4d. The elastic airbag 4e is connected to a compressed air supply device through a hose and a valve. The elastic airbag 4e can be expanded and contracted by inflating or deflating it. As the elastic airbag 4e expands and contracts, it controls the two sliders 4d to move away from or closer to each other. The upper part is connected to a rotary motor 4f, and the rotating shaft of the rotary motor 4f is fixed to the cutting blade 4a. The two rotary motors 4f are set back to back and their rotation axes coincide. The speed of the two rotary motors 4f is individually adjustable, so the output length of PVC granules is adjustable and two lengths of granules can be cut at the same time. As the two sliders 4d move away or closer, they drive the two rotary motors 4f to move away or closer, so that the cutting blade 4a can contact or separate from the surface of the perforated plate 3. It also realizes the pressure function during the cutting operation, so that the cutting blade 4a is in close contact with the perforated plate 3, ensuring the quality of the cut granules. When the perforated plate 3 needs to be repaired or replaced, first make the cutting blade 4a not contact the perforated plate 3, and then drive the power telescopic rod 6 to extend, drive the bracket 4b to lift, and raise the cutting blade 4a above the space between the two perforated plates 3.

[0025] In addition, as a further optimization, branch pipe 2 is provided with an inspection port, which is connected to a detachable inspection cover 2b, making it easy to open and clean or inspect the inside of the pipe.

[0026] When using the cutting mechanism of this utility model for PVC granulation equipment, the main pipe 1 connects to the granulator to receive heated and molten PVC, which is then diverted to two branch pipes 2. Each of the two branch pipes 2 has a discharge port 2a facing each other, and the opposing double discharge ports achieve concentrated discharge. The rotating cutting blade 4a cuts the long strip of material at the perforated plate 3 into fine particles. The airflow blowing device 5 accelerates the falling of the cut PVC particles, preventing them from adhering to the cutting mechanism, and also accelerates the drying and cooling of the particles. The speeds of the two rotating motors 4f are individually adjustable, so the discharge length of the PVC particles is adjustable and two different lengths of particles can be cut simultaneously. The elastic airbag 4e is inflated to provide pressure during the cutting operation, ensuring that the cutting blade 4a is in close contact with the perforated plate 3, thus guaranteeing the quality of the cut particles. When the perforated plate 3 needs to be repaired or replaced, the power telescopic rod 6 can be extended to lift the bracket 4b, raising the cutting blade 4a above the space between the two perforated plates 3.

[0027] The above description is only a preferred embodiment of the present utility model, but the protection scope of the present utility model is not limited thereto. It should be noted that for those skilled in the art, any changes, modifications or additions made without departing from the concept of the present utility model should fall within the protection scope of the present utility model.

Claims

1. A cutting mechanism for PVC granulation equipment, characterized in that: The system includes a main pipe (1) and two branch pipes (2) symmetrically connected to the main pipe (1). Each of the two branch pipes (2) has a discharge port (2a) facing each other. The discharge port (2a) is connected to a perforated plate (3). A cutting mechanism (4) is provided between the two perforated plates (3). The cutting mechanism (4) includes a cutting blade (4a) driven by a motor to rotate. The cutting blade (4a) can contact or separate from the surface of the perforated plate (3). The distance between the two cutting blades (4a) is variable. An airflow blowing device (5) is provided above the cutting blade (4a). Both the cutting blade (4a) and the airflow blowing device (5) can be moved to the top of the branch pipe (2).

2. The cutting mechanism for PVC granulation equipment according to claim 1, characterized in that: The cutting mechanism (4) includes a bracket (4b), one end of which is hinged to the main pipe (1), and the other end is provided with a fixed slide (4c). The fixed slide (4c) is provided with sliders (4d) movably connected to both sides. An inflatable elastic airbag (4e) is provided between the two sliders (4d). A rotary motor (4f) is connected to the slider (4d).

3. The cutting mechanism for PVC granulation equipment according to claim 2, characterized in that: The rotating shaft of the rotary motor (4f) is fixed to the cutting blade (4a), and the two rotary motors (4f) are arranged back to back with their rotation axes coinciding.

4. A cutting mechanism for PVC granulation equipment according to claim 3, characterized in that: A power telescopic rod (6) is provided between the bracket (4b) and the main pipe (1). When the power telescopic rod (6) extends, it causes the bracket (4b) to rise based on the hinge axis with the main pipe (1).

5. A cutting mechanism for a PVC granulation equipment according to claim 1, characterized in that: The branch pipe (2) is provided with an inspection port, and the inspection port is connected to a detachable inspection cover (2b).

6. A cutting mechanism for a PVC granulation equipment according to claim 2, characterized in that: The elastic airbag (4e) is connected to a compressed air supply device via a hose and a valve.

7. A cutting mechanism for PVC granulation equipment according to claim 1, characterized in that: The airflow blowing device (5) is a fan or a pipe connected to the fan, and its air outlet faces the cutting knife (4a).

8. A cutting mechanism for a PVC granulation equipment according to claim 1, characterized in that: The perforated plate (3) is provided with several discharge holes that connect the inside of the branch pipe (2) to the outside.

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