Cooling device of plastic granulator

Abstract

The utility model discloses a cooling device of a plastic granulator. The cooling device comprises a cooling box, the hot water tank is located on one inner side of the cooling box, a first partition plate is arranged between the warm water tank and the hot water tank, and a first heating rod is arranged in the hot water tank; the warm water tank is located in the middle of the cooling box, and a second heating rod is arranged in the warm water tank; the cold water tank is positioned on the other inner side of the cooling box; the air-drying cooling mechanism comprises a support, a fan, a ventilation pipe, a ventilation cavity and an air outlet hole, the support is in an opening shape, the support is fixed to one outer side of the cooling box and is close to the cold water tank, the fan is installed at the top of the support, and the fan is communicated with the ventilation cavity through the ventilation pipe. According to the utility model, the product quality is improved, the cooling efficiency and effect are improved, and meanwhile, water on the strip material belt can be blow-dried, so that subsequent pelletizing is facilitated. A first spacing plate is arranged between the warm water tank and the hot water tank, and a second spacing plate is arranged between the cold water tank and the warm water tank, so that cooling water at different temperatures can be stored, and the cooling quality is ensured.

Description

Technical Field

[0001] The utility model relates to a plastic granulator, in particular to a cooling device of the plastic granulator. Background Art

[0002] A granulator is a molding machine that can make materials into specific shapes. The structure of the existing strip granulator includes a die, a cooling section, a drying section and a pelletizer. The molten polymer is extruded by an extruder or a gear pump through a horizontally installed die to form a strip. After the strip is discharged from the die, it is cooled and then sent to the pelletizing chamber. The strip is accurately cut into the required length by the shearing action of a pair of fixed knives and a rotating knife.

[0003] The cooling method usually adopts water cooling, and it is divided into rapid cooling and slow cooling according to the different water temperatures. Rapid cooling is direct cooling with cold water. Rapid cooling is beneficial to the shaping of the plastic extruded layer, but for crystalline polymers, due to sudden cooling, internal stress is easily left inside the extruded layer, resulting in cracking during use. Generally, rapid cooling is adopted for the PVC plastic layer, and slow cooling is to reduce the internal stress of the product. Water of different temperatures is placed in the cooling water tank in sections to gradually cool down the product and shape it. Slow cooling is adopted for the extrusion of PE and PP, that is, cooling is carried out through three stages of hot water, warm water and cold water.

[0004] A cooling device for a plastic granulator is disclosed in a Chinese patent document with publication number CN205674461U. The cooling device can be slidably fixed along the length direction of the slide trough by a pressure roller, thereby changing the fixed position in the depth direction of the cooling water trough, making it easy to pass the strip material belt under the water surface at all times, thereby ensuring its cooling effect.

[0005] The above patent has the following technical problems: although the above cooling device realizes that the strip material is always passed under the water surface, due to the granulation requirements of plastic particles, it is usually necessary to gradually cool down and shape the strip material in water of different temperatures. Since a single group of cooling tanks can only perform cooling and shaping at a single temperature, the strip material is prone to adhesion or breakage when moving in different cooling tanks, which seriously affects the cooling effect and product quality of the strip material. In addition, the water temperature in the cooling tank after use changes continuously, affecting the subsequent cooling quality. Summary of the invention

[0006] In view of the above situation, in order to solve the technical problems of the prior art, the utility model provides a cooling device for a plastic granulator.

[0007] The utility model solves the above-mentioned technical problems through the following technical solutions: a cooling device of a plastic granulator, characterized in that it comprises: a cooling box; a hot water tank, located at an inner side of the cooling box, a first partition plate is provided between the warm water tank and the hot water tank, and a first heating rod is provided in the hot water tank; a warm water tank, located in the middle of the cooling box, and a second heating rod is provided in the warm water tank; a cold water tank, located at the other inner side of the cooling box, a second partition plate is provided between the cold water tank and the warm water tank, a cold water input port and a cold water output port are respectively provided on both sides of the cold water tank, and the cold water input port and the cold water output port are respectively connected with the inlet and outlet of a cooling water circulation machine; an air-drying cooling mechanism, comprising a bracket, a fan, a ventilation pipe, a ventilation cavity, and air outlet holes, the bracket is in an open shape, the bracket is fixed to an outer side of the cooling box and close to the cold water tank, the fan is installed on the top of the bracket, the fan and the ventilation cavity are connected through the ventilation pipe, and a plurality of air outlet holes are located on the inner side wall of the bracket and are connected with the ventilation cavity.

[0008] Preferably, a first guide roller is provided in the hot water tank, a second guide roller is provided in the warm water tank, and a third guide roller is provided in the cold water tank. The first guide roller, the second guide roller and the third guide roller are all rotatably connected to the cooling box.

[0009] Preferably, a first positioning block is provided on an outer side of the cooling box, and another second positioning block is provided on an outer side of the cooling box, and both the first positioning block and the second positioning block are provided with a groove.

[0010] Preferably, the hot water tank is provided with a first driving mechanism, the warm water tank is provided with a second driving mechanism, and the cold water tank is provided with a third driving mechanism. The structures of the first driving mechanism, the second driving mechanism, and the third driving mechanism are all the same. The first driving mechanism, the second driving mechanism, and the third driving mechanism all include a motor and a rotating shaft. The motor is installed on the outside of the cooling box, the motor is connected to one end of the rotating shaft, and a stirring blade is installed on the other end of the rotating shaft.

[0011] Preferably, a first filter is provided in the hot water tank, a second filter is provided in the warm water tank, and a third filter is provided in the cold water tank. The first filter, the second filter and the third filter are all located above the stirring blade.

[0012] Preferably, a collecting box is provided at the bottom end of the bracket, and the collecting box is located below the fan.

[0013] The positive and progressive effects of the utility model are: First, the utility model adopts slow cooling for the extrusion of PE and PP through the hot water tank, warm water tank and cold water tank, that is, it is cooled through three stages of hot water, warm water and cold water, and finally cooled by a fan, that is, the cold air blown by the fan is blown to the strip through the ventilation cavity and the air outlet, and no adhesion or breakage will occur, thereby improving product quality, cooling efficiency and effect, and at the same time, the water on the strip can be blown dry to facilitate subsequent pelletizing. A first partition is provided between the warm water tank and the hot water tank, and a second partition is provided between the cold water tank and the warm water tank, so that cooling water of different temperatures can be stored to ensure cooling quality.

[0014] Second, the utility model is provided with a first drive mechanism, a second drive mechanism, and a third drive mechanism. The first drive mechanism, the second drive mechanism, and the third drive mechanism all include a motor and a rotating shaft. The motor is installed on the outside of the cooling box, and the motor is connected to one end of the rotating shaft. A stirring blade is installed on the other end of the rotating shaft. The motor drives the stirring blade to rotate through the rotating shaft, which can stir the coolant (i.e., water) in the cooling box, thereby achieving the purpose of fluidity of the coolant and improving the cooling efficiency of the strip. A first filter is provided in the hot water tank, a second filter is provided in the warm water tank, and a third filter is provided in the cold water tank. The first filter, the second filter, and the third filter are all located above the stirring blade. The first filter, the second filter, and the third filter prevent the strip from colliding with the stirring blade and being damaged after falling, thereby improving safety. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is a schematic diagram of the structure of one side of the cooling device of the plastic granulator of the utility model.

[0016] Figure 2 It is a schematic structural diagram of the other side of the cooling device of the plastic granulator of the utility model.

[0017] Figure 3 It is a structural schematic diagram of the components such as the bracket and the fan in the utility model.

[0018] Figure 4 This is a schematic diagram of the structure of the utility model after the first filter screen, the second filter screen and the third filter screen are installed. DETAILED DESCRIPTION

[0019] The technical solutions in the embodiments of the present invention will be described clearly and completely below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all of the embodiments.

[0020] Examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are intended to be used to explain the present invention, and should not be construed as limiting the present invention.

[0021] In the description of the present invention, it should be understood that the terms "upper", "lower", "front", "back", "left", "right", "top", "bottom", "inside", "outside", etc., indicating directions or positional relationships, are based on the directions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific direction, be constructed and operated in a specific direction, and therefore should not be understood as a limitation on the present invention.

[0022] like Figures 1 to 3 As shown, the cooling device of the plastic granulator of the utility model comprises: a cooling box 1; a hot water tank 2, located at one inner side of the cooling box 1, a first heating rod 3 is arranged in the hot water tank 2; a warm water tank 4, located in the middle of the cooling box 1, a first partition plate 27 is arranged between the warm water tank 4 and the hot water tank 2, a second heating rod 5 is arranged in the warm water tank 4; a cold water tank 6, located at the other inner side of the cooling box 1, a second partition plate 28 is arranged between the cold water tank 6 and the warm water tank 4, and a cold water inlet 7 and a cold water inlet 8 are arranged on both sides of the cold water tank 6. The water output port 8, the cold water input port 7 and the cold water output port 8 are respectively connected to the inlet and outlet of a cooling water circulation machine; the air-drying cooling mechanism includes a bracket 10, a fan 11, a ventilation pipe 12, a ventilation cavity 13, and an air outlet 9. The bracket 10 is open. The bracket 10 is fixed to an outer side of the cooling box 1 and is close to the cold water tank 6. The fan 11 is installed on the top of the bracket 10. The fan 11 is connected to the ventilation cavity 13 through the ventilation pipe 12. Multiple air outlets 9 are located on the inner side wall of the bracket 10 and are connected to the ventilation cavity 13.

[0023] Water is put into the hot water tank 2 and the warm water tank 4, the first heating rod 3 and the second heating rod 5 heat the water to a specified temperature, and cold water is put into the cold water tank 6. One side of the cooling box 1 corresponds to the outlet of the strip, and the cold water input port 7 and the cold water output port 8 are respectively connected to the inlet and outlet of a cooling water circulation machine to achieve that the cold water tank 6 maintains a cold water state. The extrusion of PE and PP is carried out by slow cooling through the hot water tank 2, the warm water tank 4, and the cold water tank 6, that is, it is cooled through three stages of hot water, warm water, and cold water, and finally air-cooled by the fan 11, that is, the cold air blown out by the fan 11 is blown toward the strip through the ventilation cavity 13 and the air outlet 9, and at the same time, the water on the strip can be blown dry to facilitate subsequent pelletizing.

[0024] Furthermore, a first guide roller 14 is provided in the hot water tank 2, a second guide roller 15 is provided in the warm water tank 4, and a third guide roller 16 is provided in the cold water tank 6. The first guide roller 14, the second guide roller 15, and the third guide roller 16 are all rotatably connected to the cooling box 1. When the strip material belt moves on the first guide roller 14, the second guide roller 15, and the third guide roller 16, the first guide roller 14, the second guide roller 15, and the third guide roller 16 will rotate, which facilitates the movement of the strip material belt and prevents wear when moving the strip material belt, thereby protecting the strip material belt.

[0025] Among them, a first positioning block 17 is provided on an outer side of the cooling box 1, and another second positioning block 18 is provided on an outer side of the cooling box 1. The first positioning block 17 and the second positioning block 18 are both provided with a groove 19. The groove 19 is convenient for limiting the position of the strip material, thereby avoiding the strip material from hitting the wall and sticking when entering and exiting the cooling box 1, and preventing the strip material from moving at will.

[0026] In this embodiment, a first drive mechanism is provided on the hot water tank 2, a second drive mechanism is provided on the warm water tank 4, and a third drive mechanism is provided on the cold water tank 6. The structures of the first drive mechanism, the second drive mechanism, and the third drive mechanism are the same. The first drive mechanism, the second drive mechanism, and the third drive mechanism all include a motor 20 and a rotating shaft 21. The motor 20 is installed on the outside of the cooling box 1. The motor 20 is connected to one end of the rotating shaft 21. A stirring blade 22 is installed on the other end of the rotating shaft 21. The motor 20 drives the stirring blade 22 to rotate through the rotating shaft 21, which can stir the coolant (i.e., water) in the cooling box 1, thereby achieving the purpose of fluidity of the coolant and improving the cooling efficiency of the strip. Figure 4 As shown, a first filter screen 23 is provided in the water tank 2, a second filter screen 24 is provided in the warm water tank 4, and a third filter screen 25 is provided in the cold water tank 6. The first filter screen 23, the second filter screen 24, and the third filter screen 25 are all located above the stirring blade 22. The first filter screen 23, the second filter screen 24, and the third filter screen 25 prevent the strip material from colliding with the stirring blade 22 and being damaged after falling, thereby improving safety.

[0027] Specifically, a collecting box 26 is provided at the bottom end of the bracket 10. The collecting box 26 is located below the fan 11. The collecting box 26 is used to collect the coolant dropped from the strip to prevent the coolant from polluting the environment.

[0028] The working principle of the utility model is as follows: each component of the utility model is a universal standard part or a part known to the technicians in the field, and its structure and principle can be known by the technicians in the field through the technical manual or through conventional experimental methods. When in use, water is put into the hot water tank 2 and the warm water tank 4, the first heating rod 3 and the second heating rod 5 heat the water to the specified temperature, and cold water is put into the cold water tank 6. One side of the cooling box 1 corresponds to the outlet of the strip, and the cold water input port 7 and the cold water output port 8 are respectively connected to the inlet and outlet of a cooling water circulation machine, so that the cold water tank 6 maintains the cold water state. The extrusion of PE and PP through the hot water tank 2, the warm water tank 4, and the cold water tank 6 is carried out by slow cooling, that is, after three stages of cooling with hot water, warm water, and cold water, and finally through the fan 11 for air cooling, that is, the cold air blown by the fan 11 is blown to the strip through the ventilation cavity 13 and the air outlet 9, so that no adhesion or breakage will occur, which improves the product quality, the cooling efficiency and effect, and at the same time, the water on the strip can be blown dry, which is convenient for subsequent pelletizing. A first partition plate 27 is provided between the warm water tank 4 and the hot water tank 2, and a second partition plate 28 is provided between the cold water tank 6 and the warm water tank 4, so that cooling water of different temperatures can be stored to ensure cooling quality.

[0029] The above shows and describes the basic principles and main features of the utility model and the advantages of the utility model. For those skilled in the art, it is obvious that the utility model is not limited to the details of the above exemplary embodiments, and can be implemented in other specific forms without departing from the spirit or basic features of the utility model. Therefore, no matter from which point of view, the embodiments should be regarded as exemplary and non-restrictive. The scope of the utility model is defined by the attached claims rather than the above description, and it is intended to include all changes within the meaning and scope of the equivalent elements of the claims. Any figure mark in the claims should not be regarded as limiting the claims involved.

[0030] In addition, it should be understood that although the present specification is described according to implementation modes, not every implementation mode contains only one independent technical solution. This description of the specification is only for the sake of clarity. Those skilled in the art should regard the specification as a whole. The technical solutions in each embodiment may also be appropriately combined to form other implementation modes that can be understood by those skilled in the art.

Claims

1. A cooling device for a plastic granulator, characterized in that: It includes: A cooling box (1); a hot water tank (2) located on one inner side of the cooling box (1), a first heating rod (3) being provided in the hot water tank (2); a warm water tank (4) located in the middle of the cooling box (1), a first partition plate (27) being provided between the warm water tank (4) and the hot water tank (2), a second heating rod (5) being provided in the warm water tank (4); a cold water tank (6) located on the other inner side of the cooling box (1), a second partition plate (28) being provided between the cold water tank (6) and the warm water tank (4), a cold water input port (7) and a cold water output port (8) being provided on both sides of the cold water tank (6), and a cold water input port (7) and a cold water output port (8) being provided on both sides of the cold water tank (6). The outlet (7) and the cold water outlet (8) are respectively connected to the inlet and outlet of a cooling water circulation machine; the air-drying cooling mechanism comprises a bracket (10), a fan (11), a ventilation pipe (12), a ventilation cavity (13), and air outlet holes (9); the bracket (10) is in an open shape, the bracket (10) is fixed to an outer side of the cooling box (1) and close to the cold water tank (6); the fan (11) is installed on the top of the bracket (10), the fan (11) and the ventilation cavity (13) are connected through the ventilation pipe (12), and a plurality of air outlet holes (9) are located on the inner side wall of the bracket (10) and are connected to the ventilation cavity (13).

2. The cooling device of the plastic granulator according to claim 1, characterized in that: A first guide roller (14) is provided in the hot water tank (2), a second guide roller (15) is provided in the warm water tank (4), and a third guide roller (16) is provided in the cold water tank (6). The first guide roller (14), the second guide roller (15), and the third guide roller (16) are all rotatably connected to the cooling box (1).

3. The cooling device of the plastic granulator according to claim 1, characterized in that: A first positioning block (17) is provided on an outer side of the cooling box (1), and another second positioning block (18) is provided on an outer side of the cooling box (1). Both the first positioning block (17) and the second positioning block (18) are provided with a groove (19).

4. The cooling device of the plastic granulator according to claim 1, characterized in that: The hot water tank (2) is provided with a first driving mechanism, the warm water tank (4) is provided with a second driving mechanism, and the cold water tank (6) is provided with a third driving mechanism. The structures of the first driving mechanism, the second driving mechanism, and the third driving mechanism are all the same. The first driving mechanism, the second driving mechanism, and the third driving mechanism all include a motor (20) and a rotating shaft (21). The motor (20) is mounted on the outside of the cooling box (1). The motor (20) is connected to one end of the rotating shaft (21), and a stirring blade (22) is mounted on the other end of the rotating shaft (21).

5. The cooling device of the plastic granulator according to claim 4, characterized in that: A first filter screen (23) is provided in the hot water tank (2), a second filter screen (24) is provided in the warm water tank (4), and a third filter screen (25) is provided in the cold water tank (6); the first filter screen (23), the second filter screen (24), and the third filter screen (25) are all located above the stirring blade (22).

6. The cooling device of the plastic granulator according to claim 1, characterized in that: A collecting box (26) is provided at the bottom end of the bracket (10), and the collecting box (26) is located below the fan (11).

Images