Granulator for granulating water braces

Abstract

The utility model belongs to the technical field of water brace granulation, and relates to a granulator for water brace granulation. A hobbing cutter (2) and a roller assembly are arranged in the granulator box body (1), a cutter fixing frame (3) is arranged between the hobbing cutter (2) and the roller assembly, the roller assembly comprises an upper roller (4) and a lower roller (5), a cold air inlet (6) and a high-pressure air inlet (7) are formed in the upper portion of the granulator box body (1), and the high-pressure air inlet (7) is aligned with the hobbing cutter (2). The granulator for granulating the water brace is simple in structure, can effectively avoid the problem that granules cut by long-strip plastic raw materials to be granulated are adhered to the hobbing cutter to cause the hobbing cutter to fail to granulate, does not need to frequently clean the granules, improves the operation reliability of equipment, and ensures that the equipment can work for a long time.

Description

Technical Field

[0001] The utility model belongs to the technical field of water strand pelletizing, and more specifically relates to a pelletizer for water strand pelletizing. Background Art

[0002] Currently, water-stretching technology remains a mainstream granulation and pelletizing technology. The basic processing method involves uniformly mixing the rubber material using a co-rotating twin-screw extruder or a discharging kneader. The material is then extruded into a die head and discharged into strips. The material is then cooled in a water trough, dried in an air dryer, and cut into individual pellets by a pelletizer. The commonly used pelletizing equipment is a roller cutter. The high-speed rotation of the roller cutter and the fixed blade create a shearing effect, cutting the long plastic strips into individual pellets. A vibrating screen then removes oversized particles to obtain the desired size. For plastics with softening points slightly above room temperature, such as POE, solid epoxy, and EVA, roller cutter pelletizing can sometimes cause the plastic to stick to the cutter, resulting in uneven pellet lengths. The long plastic strips can even wrap around the roller cutter, interrupting the pelletizing process. Analysis shows that the reason for this is that when the roller cuts and pelletizes, the roller and the fixed blade squeeze long strips of plastic. The high-speed rotation of the roller generates heat from the friction, which sometimes softens some of the plastic and causes it to stick to the roller. This reduces the roller's ability to shear the plastic the next time it rotates to the fixed blade. In mild cases, the pellets become longer, and in severe cases, almost no pellets are cut, with the long strips directly covering the roller, causing production interruptions. To address this problem, the industry has adopted methods such as reducing production speed to reduce the frequency of blade sticking, or using water rings, underwater grinding, and other methods for pelletizing. However, this method has high equipment investment costs and significantly higher water and electricity consumption than roller pelletizing.

[0003] The prior art includes a technology titled "A Plastic Pelletizer" and published as "CN 108437265 A." This technology provides a plastic pelletizer comprising a cooling water tank, a traction roller assembly, and a cutter assembly, arranged sequentially at one end of an extruder discharge port. The traction roller assembly comprises an upper traction roller and a lower traction roller, the lower traction roller being provided with a set of water-guiding grooves having a width less than the width of the material strip. A cooling fan is provided between the traction roller assembly and the cutter, with the air outlet of the cooling fan being arranged at an angle of no more than 15° to the horizontal. This invention effectively prevents plastic pellets from clumping during the pelletizing process, improves product qualification rate, and helps extend the service life of the cutter. This technology does not relate to the technical solution of the present application. Utility Model Content

[0004] The technical problem to be solved by the utility model is: in view of the deficiencies of the existing technology, a pelletizer for water-stranded pelletizing is provided, which has a simple structure and can effectively prevent the pellets cut from the long plastic raw materials to be pelletized from adhering to the roller, causing the pelletizing failure of the roller, does not require frequent pellet cleaning, improves the operating reliability of the equipment and ensures that the equipment can work for a long time.

[0005] To solve the above-mentioned technical problems, the technical solution adopted by the present invention is:

[0006] The utility model discloses a pelletizer for water strand pelletizing. A roller cutter and a roller assembly are arranged in a pelletizer housing. A fixed cutter frame is arranged between the roller cutter and the roller assembly. The roller assembly comprises an upper roller and a lower roller. A cold air inlet and a high-pressure air inlet are arranged on the upper part of the pelletizer housing. The high-pressure air inlet is aligned with the roller cutter.

[0007] The hob is connected to a hob shaft, one end of the hob shaft is connected to a hob drive motor, and the hob drive motor is fixedly connected to the outside of the pelletizer housing.

[0008] A feed chute is provided on one side of the pelletizer housing.

[0009] The upper roller is connected to the upper roller shaft, one end of the upper roller shaft is connected to the upper roller drive motor, and the upper roller drive motor is fixedly connected to the outside of the pelletizer box.

[0010] The lower roller is connected to the lower roller shaft, one end of the lower roller shaft is connected to the lower roller drive motor, and the lower roller drive motor is fixedly connected to the outside of the pelletizer box.

[0011] A pelletizer case cover is provided on the upper portion of the pelletizer case, and a cold air inlet and a high-pressure air inlet 7 are respectively provided on the pelletizer case cover.

[0012] Sealing strips are arranged on the inner edges of the folded edges around the pelletizer case cover.

[0013] The cold air inlet is connected to the fan through a pipeline, and the high-pressure air inlet is connected to the air pump through a pipeline.

[0014] The long plastic raw materials to be pelletized are arranged to enter the pelletizer box through the feed chute, then pass between the upper roller and the lower roller, and are then cut into pellets by the fixed knife holder and the roller.

[0015] The technical solution of this utility model is adopted, and the working principle and beneficial effects are as follows:

[0016] The pelletizer for water-pulled strand pelletizing of the utility model is provided with a pelletizer housing, which serves as the foundation for mounting other components. A hob and roller assembly are provided within the pelletizer housing. The roller assembly includes an upper roller and a lower roller. The hob and roller assembly are driven by respective drive motors. A fixed blade holder is provided between the hob and roller assembly. After the long plastic strip to be pelletized enters the pelletizer housing 1, the hob and fixed blade holder cooperate to cut the long plastic strip to be pelletized into a granular structure. The granular finished product then falls below the pelletizer housing and is collected by a collection box, which is periodically replaced. A cold air inlet and a high-pressure air inlet are provided at the top of the pelletizer housing. The high-pressure air inlet is aligned with the hob. The high-pressure air inlet is connected to high-pressure gas from the factory via a pipeline. The air pressure is regulated by a pressure regulating valve during production. After the high-pressure gas enters the pelletizer housing, it flushes the hob, thereby flushing away pellets adhering to the hob to prevent the hob from failing in pelletizing. The cold air inlet is connected to the air cooler. When the pelletizer is working, the air cooler continuously delivers cold air to the inside of the pelletizer cabinet to reduce the temperature of the long plastic raw materials to be pelletized, pelletizers, hobs and fixed knives inside the pelletizer cabinet, and quickly take away the heat generated by the friction of the hobs, reducing the possibility of the plastic pellets softening and sticking to the knife. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] The following is a brief description of the contents and symbols in the drawings of this specification:

[0018] Figure 1 This is a schematic structural diagram of the pelletizer for water strand pelletizing according to the present invention;

[0019] The markings in the attached figure are: 1. pelletizer housing; 2. hob; 3. fixed knife holder; 4. upper roller; 5. lower roller; 6. cold air inlet; 7. high-pressure air inlet; 8. feed trough; 9. pelletizer housing cover; 10. long plastic raw material to be pelletized. DETAILED DESCRIPTION

[0020] The following is a detailed description of the embodiments of the present invention, such as the shapes, structures, positions and connections of the various components involved, the functions and working principles of the various components, etc., by referring to the accompanying drawings.

[0021] As attached Figure 1As shown, the present invention is a pelletizer for water strand pelletizing. A pelletizer housing 1 houses a hob 2 and a roller assembly. A fixed blade holder 3 is positioned between the hob 2 and the roller assembly. The roller assembly comprises an upper roller 4 and a lower roller 5. A cold air inlet 6 and a high-pressure air inlet 7 are positioned at the top of the pelletizer housing 1. The high-pressure air inlet 7 is aligned with the hob 2. This structure addresses the shortcomings of the prior art and provides an improved technical solution. During structural setup, the pelletizer housing 1 is installed, serving as the foundation for mounting other components. Inside the housing 1 are mounted a hob 2 and a roller assembly, comprising an upper roller 4 and a lower roller 5. Each of the hob and roller assembly is driven by its own drive motor. A fixed blade holder 3 is positioned between the hob 2 and the roller assembly. After a long plastic material 10 to be pelletized enters the housing 1, the hob and fixed blade holder cooperate to cut the long plastic material into granules. The granular products then fall below the housing 1 and are collected by a collection box, which is periodically replaced. A cold air inlet 6 and a high-pressure air inlet 7 are located at the top of the housing 1. The high-pressure air inlet 7 is aligned with the hob 2. High-pressure air inlet 7 is connected to the factory's high-pressure gas via a pipeline. During production, the pressure is regulated by a pressure regulating valve. After entering the housing 1, the high-pressure gas flushes the hob, removing pellets stuck to the hob and preventing pelletizing failure. The cold air inlet 6 is connected to a cooling fan. When the pelletizer for water-pulled strip pelletizing is in operation, the cooling fan continuously delivers cold air to the interior of the pelletizer housing 1 to reduce the temperature of the long plastic raw material 10 to be pelletized, the pelletizer, the roller, and the fixed knife inside the pelletizer housing 1, and quickly removes the heat generated by the friction of the roller, thereby reducing the possibility of the plastic pellets softening and sticking to the knife. The pelletizer for water-pulled strip pelletizing described in the utility model has a simple structure and can effectively prevent the pellets cut from the long plastic raw material to be pelletized from adhering to the roller, thereby preventing the roller from failing to pelletize. Frequent pelletizing cleaning is not required, thereby improving the reliability of the equipment and ensuring that the equipment can work for a long time.

[0022] The hob 2 is connected to a hob shaft, one end of which is connected to a hob drive motor, which is fixedly connected to the outside of the pelletizer housing 1. In this structure, the control unit controls the start and stop and speed of the hob drive motor, which drives the hob to rotate during transfer and cooperates with the fixed blade holder to achieve pelletizing.

[0023] A feed chute 8 is provided on one side of the pelletizer housing 1. In the above structure, the feed chute is used to continuously feed the long plastic raw materials 10 to be pelletized into the interior of the pelletizer housing 1 to achieve pelletizing.

[0024] The upper roller 4 is connected to an upper roller shaft, one end of which is connected to an upper roller drive motor, which is fixedly connected to the exterior of the pelletizer housing 1. With this structure, the upper roller drive motor, under the control of a control unit, controls the rotation of the upper roller, which cooperates with the lower roller to convey the long plastic raw material 10 to be pelletized, thereby meeting the pelletizing requirements of the roller and the fixed blade holder.

[0025] The lower roller 5 is connected to a lower roller shaft, one end of which is connected to a lower roller drive motor, which is fixedly connected to the exterior of the pelletizer housing 1. With this structure, the lower roller drive motor, under the control of a control unit, controls the rotation of the lower roller, which cooperates with the upper roller to convey the long plastic raw material 10 to be pelletized, thereby meeting the pelletizing requirements of the roller and fixed blade holder.

[0026] A pelletizer case cover 9 is disposed on the upper portion of the pelletizer case 1. The cold air inlet 6 and the high-pressure air inlet 7 are respectively disposed on the pelletizer case cover 9. This structure facilitates the removal of the pelletizer case cover 9. Sealing strips are provided on the inner edges of the folded edges around the pelletizer case cover 9. This structure effectively seals the joint between the pelletizer case cover and the pelletizer case when they are fastened together.

[0027] The cold air inlet 6 is connected to the fan through a pipeline, and the high-pressure air inlet 7 is connected to the air pump through a pipeline. In the above structure, the fan is used to provide cold air, and the air pump is used to provide high-pressure air.

[0028] The long plastic raw material 10 to be pelletized is configured to enter the pelletizer housing 1 through the feed chute 8, pass between the upper roller 4 and the lower roller 5, and then be cut into pellets by the fixed blade 3 and the roller 2. The above structure reliably achieves the pelletizing of the long plastic raw material 10 to be pelletized.

[0029] The pelletizer for water-pulled strand pelletizing of the present invention comprises a pelletizer housing 1, which serves as the foundation for mounting other components. A hob 2 and a roller assembly are disposed within the pelletizer housing 1. The roller assembly comprises an upper roller 4 and a lower roller 5. The hob and roller assembly are driven by respective drive motors. A fixed blade holder 3 is disposed between the hob 2 and the roller assembly. After a long plastic raw material 10 to be pelletized enters the pelletizer housing 1, the hob and the fixed blade holder cooperate to cut the long plastic raw material 10 to be pelletized into a granular structure. The granular finished product then falls below the pelletizer housing 1 and is collected by a collection box, which is replaced periodically. A cold air inlet 6 and a high-pressure air inlet 7 are disposed on the upper portion of the pelletizer housing 1, and the high-pressure air inlet 7 is aligned with the hob 2. The high-pressure air inlet 7 is connected to the factory's high-pressure gas through a pipeline. The air pressure is regulated by a pressure regulating valve during production. The high-pressure gas enters the pelletizer housing 1 and flushes the hob 2, thereby washing away the pellets stuck to the hob 2 to prevent pelletizing failure of the hob 2. The cold air inlet 6 is connected to a cold air blower. When the pelletizer is operating, the cold air blower continuously delivers cold air into the pelletizer housing 1 to reduce the temperature of the long plastic raw materials 10 to be pelletized, the pellets, the hob, and the fixed blade inside the pelletizer housing 1. It also quickly removes the heat generated by the friction of the hob, reducing the possibility of the plastic pellets softening and adhering to the hob.

[0030] The above is an exemplary description of the present invention in conjunction with the accompanying drawings. It is obvious that the specific implementation of the present invention is not limited to the above-mentioned method. As long as various improvements are made using the method concept and technical solution of the present invention, or the concept and technical solution of the present invention are directly applied to other occasions without improvement, they are all within the scope of protection of the present invention.

Claims

1. A pelletizer for water strand pelletizing, characterized by: A roller cutter (2) and a roller assembly are arranged in a pelletizer housing (1); a fixed cutter frame (3) is arranged between the roller cutter (2) and the roller assembly; the roller assembly comprises an upper roller (4) and a lower roller (5); a cold air inlet (6) and a high-pressure air inlet (7) are arranged on the upper portion of the pelletizer housing (1); and the high-pressure air inlet (7) is aligned with the roller cutter (2).

2. The pelletizer for pelletizing water strands according to claim 1, characterized in that: The hob (2) is connected to a hob shaft, one end of the hob shaft is connected to a hob drive motor, and the hob drive motor is fixedly connected to the outside of the pelletizer housing (1).

3. The pelletizer for pelletizing water strands according to claim 1 or 2, characterized in that: A feed chute (8) is provided on one side of the pelletizer housing (1).

4. The pelletizer for pelletizing water strands according to claim 1 or 2, characterized in that: The upper roller (4) is connected to the upper roller shaft, one end of the upper roller shaft is connected to the upper roller drive motor, and the upper roller drive motor is fixedly connected to the outside of the pelletizer housing (1).

5. The pelletizer for pelletizing water strands according to claim 1 or 2, characterized in that: The lower roller (5) is connected to the lower roller shaft, one end of the lower roller shaft is connected to the lower roller drive motor, and the lower roller drive motor is fixedly connected to the outside of the pelletizer housing (1).

6. The pelletizer for pelletizing water strands according to claim 1 or 2, characterized in that: A pelletizer case cover (9) is provided on the upper portion of the pelletizer case (1), and a cold air inlet (6) and a high-pressure air inlet (7) are respectively provided on the pelletizer case cover (9).

7. The pelletizer for pelletizing water strands according to claim 6, characterized in that: Sealing strips are provided on the inner edges of the folded edges around the pelletizer case cover (9).

8. The pelletizer for pelletizing water strands according to claim 1 or 2, characterized in that: The cold air inlet (6) is connected to the fan through a pipeline, and the high-pressure air inlet (7) is connected to the air pump through a pipeline.

9. The pelletizer for pelletizing water strands according to claim 3, characterized in that: The long plastic raw material (10) to be pelletized is configured to be able to enter the pelletizer housing (1) through a feed trough (8), then pass between an upper roller (4) and a lower roller (5), and then be cut into pelletized structures by a fixed knife holder (3) and a roller (2).

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