Multi-stage cooling device for plastic particles

Abstract

The utility model relates to the technical field of plastic particle cooling, in particular to a multi-stage plastic particle cooling device which comprises a multi-stage cooling box, a mounting plate and a bottom plate are respectively arranged above and below the multi-stage cooling box, support legs are arranged between the mounting plate and the bottom plate, an extrusion device and a blanking port are arranged on the mounting plate, a protective net is arranged in the blanking port, and a plurality of cooling holes are formed in the protective net. An extrusion head is arranged on the extrusion device, a cooling water tank and a movable frame are arranged on the bottom plate, trundles and a fan cover are arranged on the movable frame, a three-stage cooling fan is arranged in the fan cover, a vibration motor and an exhaust port are arranged on a multi-stage cooling box, a heat exchanger and a circulating pump are arranged on the cooling water tank, and a spraying plate is arranged above the extrusion head. And the situation that the molding effect is affected due to the fact that the extrusion-molded plastic particles are softened due to the high temperature is avoided, the multi-stage cooling molding effect on the extrusion-molded plastic particles is improved, and the situation that large-size particles directly fall into the multi-stage cooling box from the discharging opening is avoided.

Description

Technical Field

[0001] The utility model relates to the technical field of plastic pellet cooling, in particular to a multi-stage cooling device for plastic pellets. Background Art

[0002] Plastic pellets, also known as plastic granules or resin pellets, are the basic raw materials for making plastic products. Plastic pellets are usually solid granular structures made of a specific type of plastic resin.

[0003] Plastic pellets are generally extruded into a granular structure using an extruder during production and processing.

[0004] The specific production and processing principle is to put the plastic raw material into the feeding hopper of the extruder, then pass through the screw and heat in the extruder, and finally extrude it from the extruder head into granular plastic pellets.

[0005] At present, the existing plastic pellets need to be cooled and solidified when being extruded through an extruder to ensure the molding effect and avoid the high temperature causing the extruded plastic pellets to soften and affect the molding effect.

[0006] Therefore, a multi-stage cooling device for plastic pellets is needed to solve the above problems. Utility Model Content

[0007] The utility model aims to solve the above-mentioned shortcomings in the prior art and proposes a multi-stage cooling device for plastic pellets.

[0008] In order to achieve the above purpose, the utility model adopts the following technical solutions:

[0009] A multi-stage cooling device for plastic pellets is designed, comprising a multi-stage cooling box, wherein a mounting plate and a bottom plate are respectively arranged at the upper and lower parts of the multi-stage cooling box, a supporting leg is arranged between the mounting plate and the bottom plate, an extrusion device and a material dropout port are arranged on the mounting plate, a protective net is arranged in the material dropout port, an extrusion head is arranged on the extrusion device, a cooling water tank and a movable frame are arranged on the bottom plate, casters and a fan cover are arranged on the movable frame, a three-stage cooling fan is arranged in the fan cover, a vibration motor and an exhaust port are arranged on the multi-stage cooling box, a heat exchanger and a circulation pump are arranged on the cooling water tank, a spray plate is arranged above the extrusion head, and a discharge pipe is arranged below the multi-stage cooling box.

[0010] Furthermore, the inside of the spray plate is a hollow cavity, and a spray head is provided at the lower end of the spray plate. The spray heads are arranged in eight groups longitudinally, and each group has eight heads arranged transversely and are connected to the hollow cavity of the spray plate.

[0011] Furthermore, a water pipe is connected to the right end of the spray plate, the water pipe is connected to a circulation pump, the circulation pump is connected to a circulation pipe, and the circulation pipe is inserted in a multi-stage cooling box.

[0012] Furthermore, a damping shock absorber is provided between the multi-stage cooling box and the bottom plate, and four of the damping shock absorbers are symmetrically arranged. The top-view cross-sectional dimension of the blanking port is not less than the top-view cross-sectional dimension of the spray plate.

[0013] Furthermore, the exhaust port is opened on the back side of the multi-stage cooling box, and a breathable waterproof membrane is provided in the exhaust port, and the breathable waterproof membrane is a hard ultra-fine fiber membrane structure.

[0014] Furthermore, the cross section of the movable frame is a Z-shaped structure, an air outlet is provided on the movable frame, and the inside of the fan cover is a hollow cavity connected to the air outlet.

[0015] Furthermore, casters are provided at the lower end of the movable frame, and four casters are symmetrically arranged and in rolling contact with the bottom plate.

[0016] The utility model provides a multi-stage cooling device for plastic pellets, which has the following beneficial effects:

[0017] 1. The utility model is provided with a spray device, a vibrating multi-stage cooling box with an exhaust port, a mounting plate with a blanking port, a cooling water tank structure with a heat exchanger and a circulating pump, and a transverse three-stage cooling fan structure, so as to achieve preliminary spray cooling of the extrusion head and the extruded plastic pellets. The finished plastic pellets then fall into the multi-stage cooling box for secondary cooling by the coolant while being vibrated. Finally, the three-stage cooling fan is used for final cooling and drying, so as to avoid softening of the extruded plastic pellets due to high temperature and affecting the molding effect, thereby improving the multi-stage cooling molding effect of the extruded plastic pellets as a whole.

[0018] 2. The utility model provides a material drop opening on the mounting plate and arranges a protective net in the material drop opening to prevent large-volume particles from falling directly into the multi-stage cooling box from the material drop opening. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 This is a first-view stereoscopic diagram of the overall structure of the utility model;

[0020] Figure 2 It is a stereoscopic diagram of the overall structure of the utility model from a second viewing angle;

[0021] Figure 3 For the utility model Figure 2 A partial enlarged view of the middle part;

[0022] Figure 4It is a schematic diagram of the overall structure of the utility model from top view;

[0023] Figure 5 For the utility model Figure 4 Middle BB cross-section.

[0024] In the figure: 1 multi-stage cooling box; 10 discharge pipe; 11 vibration motor; 12 damping shock absorber; 13 exhaust port; 14 breathable waterproof membrane; 2 bottom plate; 21 support leg; 3 mounting plate; 31 drop port; 32 protective net; 4 extrusion device; 41 extrusion head; 5 cooling water tank; 51 heat exchanger; 6 spray plate; 61 spray head; 62 water pipe; 7 circulation pipe; 71 circulation pump; 8 mobile frame; 81 caster; 82 fan cover; 83 three-stage cooling fan; 84 air outlet. DETAILED DESCRIPTION

[0025] 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.

[0026] Reference Figure 1-5 A multi-stage cooling device for plastic pellets comprises a multi-stage cooling box 1, wherein a mounting plate 3 and a bottom plate 2 are respectively arranged at the upper and lower parts of the multi-stage cooling box 1, a support leg 21 is arranged between the mounting plate 3 and the bottom plate 2, an extrusion device 4 and a blanking port 31 are arranged on the mounting plate 3, a protective net 32 ​​is arranged in the blanking port 31, an extrusion head 41 is arranged on the extrusion device 4, a cooling water tank 5 and a movable frame 8 are arranged on the bottom plate 2, casters 81 and a fan cover 82 are arranged on the movable frame 8, a three-stage cooling fan 83 is arranged in the fan cover 82, a vibration motor 11 and an exhaust port 13 are arranged on the multi-stage cooling box 1, a heat exchanger 51 and a circulating pump 71 are arranged on the cooling water tank 5, a spray plate 6 is arranged above the extrusion head 41, a discharge pipe 10 is arranged below the multi-stage cooling box 1, the extrusion device 4 and its extrusion head 41 are both prior art, and some existing structures are not drawn and marked, and no further description is required.

[0027] The heat exchanger 51 is a prior art and can perform heat exchange on the circulating high-temperature coolant. The heat generated by the heat exchange will be dissipated through the exhaust fan and heat sink on the heat exchanger 51, so as to cool the high-temperature coolant again for recycling.

[0028] The vibration motor 11 belongs to the YZS series vibration motor and is a prior art.

[0029] In detail, there is a hollow cavity inside the spray plate 6, and a spray head 61 is provided at the lower end of the spray plate 6. The spray heads 61 are arranged in eight groups longitudinally, and each group is arranged in eight groups transversely and connected to the hollow cavity of the spray plate 6. The protective net 32 ​​is made of stainless steel, which is durable, and the mesh size of the protective net 32 ​​can ensure that the extruded plastic particles pass through and fall into the multi-stage cooling box 1.

[0030] Furthermore, the right end of the spray plate 6 is connected to a water pipe 62, which is connected to a circulation pump 71, which is connected to a circulation pipe 7, which is inserted into the multi-stage cooling box 1 to circulate the coolant into the cooling water tank and cool it down for spraying again.

[0031] Furthermore, a damping shock absorber 12 is provided between the multi-stage cooling box 1 and the base plate 2. There are four damping shock absorbers 12 arranged symmetrically. The damping shock absorber 12 is a prior art and can dampen and buffer the vertical vibration force of the multi-stage cooling box 1 driven by the vibration motor 11.

[0032] The cross-sectional dimension of the blanking port 31 when viewed from above is not less than the cross-sectional dimension of the spray plate 6 when viewed from above, so as to ensure that the spray head 61 on the spray plate 6 performs comprehensive preliminary spray cooling on the extrusion head 41 and the extruded plastic pellets.

[0033] In more detail, the exhaust port 13 is opened on the back side of the multi-stage cooling box 1, and a breathable waterproof membrane 14 is arranged inside the exhaust port 13. The breathable waterproof membrane 14 is a hard ultra-fine fiber membrane structure with waterproof and breathable properties. The main body material is very hard, impact-resistant and durable, and leakage of coolant is avoided. At the same time, the airflow blown out by the three-stage cooling fan 83 is discharged to achieve airflow fluidity.

[0034] In general, the cross-section of the movable rack 8 is a Z-shaped structure, an air outlet 84 is provided on the movable rack 8, the fan cover 82 has a hollow cavity and is connected to the air outlet 84, and the three-stage cooling fan 83 is combined to blow air downward and perform three-stage blowing cooling and drying on the plastic particles in the multi-stage cooling box 1. Later, the valve on the discharge pipe 10 can be opened to discharge the material.

[0035] Finally, casters 81 are provided at the lower end of the mobile frame 8. There are four casters 81 symmetrically arranged and in rolling contact with the bottom plate 2. The casters 81 are universal brake wheels, which enable the mobile frame 8 to move and perform brake positioning.

[0036] Working method: When the plastic pellets pass through the extrusion device 4 and are extruded into pellets from the extrusion head 41, the heat exchanger 51, the circulation pump 71, and the vibration motor 11 can be started. The circulation pump 71 will pump the low-temperature coolant in the cooling water tank 5 into the water pipe 62, and then the lower extrusion head 41 and the plastic pellets extruded into pellets are preliminarily cooled as a whole through the multiple spray heads 61 on the spray plate 6. Then the preliminarily cooled plastic pellets and the coolant will pass through the protective net 32 ​​and fall into the multi-stage cooling box 1. At this time, the multi-stage cooling box 1 will be driven by the vibration motor 11 to vibrate vertically, so that the plastic pellets in the multi-stage cooling box 1 can be vibrated while being cooled by the coolant. At the same time, the used high-temperature coolant will be pumped away by the circulation pipe 7 and circulated into the cooling water tank 5. Then the started heat exchanger 51 will perform heat exchange on the circulated high-temperature coolant to form low-temperature coolant again. Then the low-temperature coolant will be pumped away again and fall into the multi-stage cooling box 1 to perform secondary cooling on the plastic pellets. This cycle continues.

[0037] When the secondary cooling is completed, the heat exchanger 51 and the circulation pump 71 are stopped, and then the movable frame 8 is pushed to the right. When the fan cover 82 is aligned with the top opening of the multi-stage cooling box 1, the brake of the caster 81 is applied and the tertiary cooling fan 83 is started. At this time, the tertiary cooling fan 83 will perform a final cooling and drying of the plastic pellets in the multi-stage cooling box 1 to avoid softening of the extruded plastic pellets due to high temperature and affecting the molding effect, thereby improving the multi-stage cooling molding effect of the extruded plastic pellets as a whole.

[0038] In addition, by opening a material drop opening 31 on the mounting plate 3 and arranging a protective net 32 ​​in the material drop opening 31 , it is prevented that large-volume particles directly fall into the multi-stage cooling box 1 from the material drop opening 31 .

[0039] The above description is only a preferred specific implementation manner of the present invention, but the protection scope of the present invention is not limited thereto. Any technician familiar with the technical field can make equivalent replacements or changes within the technical scope disclosed by the present invention according to the technical scheme and the utility model concept of the present invention, which should be covered by the protection scope of the present invention.

Claims

1. A multi-stage cooling device for plastic pellets, comprising a multi-stage cooling box (1), characterized in that: The multi-stage cooling box (1) is provided with a mounting plate (3) and a bottom plate (2) at the top and bottom, respectively; a support leg (21) is provided between the mounting plate (3) and the bottom plate (2); an extrusion device (4) and a blanking port (31) are provided on the mounting plate (3); a protective net (32) is provided in the blanking port (31); an extrusion head (41) is provided on the extrusion device (4); a cooling water tank (5) and a movable frame (8) are provided on the bottom plate (2); casters (81) and a fan cover (82) are provided on the movable frame (8); a three-stage cooling fan (83) is provided in the fan cover (82); a vibration motor (11) and an exhaust port (13) are provided on the multi-stage cooling box (1); a heat exchanger (51) and a circulation pump (71) are provided on the cooling water tank (5); a spray plate (6) is provided above the extrusion head (41); and a discharge pipe (10) is provided below the multi-stage cooling box (1).

2. A multi-stage cooling device for plastic pellets according to claim 1, characterized in that: The spray plate (6) has a hollow cavity inside. A spray head (61) is provided at the lower end of the spray plate (6). The spray heads (61) are arranged in eight groups in a longitudinal direction, each group has eight heads arranged in a transverse direction and are connected to the hollow cavity of the spray plate (6).

3. A multi-stage cooling device for plastic pellets according to claim 1, characterized in that: The right end of the spray plate (6) is connected to a water pipe (62), the water pipe (62) is connected to a circulation pump (71), the circulation pump (71) is connected to a circulation pipe (7), and the circulation pipe (7) is inserted into the multi-stage cooling box (1).

4. The multi-stage cooling device for plastic pellets according to claim 1, characterized in that: A damping shock absorber (12) is provided between the multi-stage cooling box (1) and the bottom plate (2), and four damping shock absorbers (12) are symmetrically arranged. The top view cross-sectional dimension of the drop opening (31) is not less than the top view cross-sectional dimension of the spray plate (6).

5. The multi-stage cooling device for plastic pellets according to claim 1, characterized in that: The exhaust port (13) is opened on the back side of the multi-stage cooling box (1), and a breathable waterproof membrane (14) is arranged inside the exhaust port (13), and the breathable waterproof membrane (14) is a hard ultra-fine fiber membrane structure.

6. The multi-stage cooling device for plastic pellets according to claim 1, characterized in that: The cross section of the movable frame (8) is a Z-shaped structure. An air outlet hole (84) is provided on the movable frame (8). The fan cover (82) has a hollow cavity in it and is in communication with the air outlet hole (84).

7. The multi-stage cooling device for plastic pellets according to claim 1, characterized in that: The lower end of the mobile frame (8) is provided with casters (81), and the casters (81) are four symmetrically arranged and in rolling contact with the bottom plate (2).

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