Plastic granulator with cooling mechanism

Abstract

The utility model discloses a plastic granulator with a cooling mechanism, relates to the technical field of plastics, and aims to solve the technical problems of large temperature difference between inside and outside, easy adhesion of granules and higher energy consumption caused by single external cooling of the traditional plastic granulator, comprising a cylinder body, a cooling mechanism A, a combining mechanism, a cooling mechanism B and a cutting mechanism, the cooling mechanism A is arranged at the upper end in the barrel, the combining mechanism is arranged in the middle in the barrel, the cooling mechanism B is arranged at the lower end in the barrel, the cutting mechanism is arranged at the lower end outside the barrel, the cutting mechanism is connected with the lower end of the cooling mechanism B, and the upper end of the cooling mechanism B is connected with the lower end of the combining mechanism. And the merging mechanism is connected with the lower end of the cooling mechanism A. Through the collaborative design of the hole channel A and the guide pipe, molten plastic wraps the guide pipe after being shunted by the conical guide block, internal cooling media dissipate heat uniformly, the internal and external temperature difference is optimized in combination with external cooling, and the cooling efficiency and the particle forming quality are improved.

Description

Technical Field

[0001] This utility model relates to the field of plastics technology, and more specifically, to a plastic pelletizer with a cooling mechanism. Background Technology

[0002] Plastics are materials based on high molecular weight polymers and are widely used in packaging, electronics, construction, and other fields. In the production of plastic products, raw materials need to be processed into granules through processes such as hot melting, extrusion, and molding for subsequent injection molding or blow molding. Plastic pelletizers are key equipment in this process; their core function is to cool and solidify molten plastic and cut it into uniform granules.

[0003] Existing plastic pelletizers mostly rely on a single external cooling method, such as water immersion or surface air cooling, which easily leads to uneven cooling rates between the inside and outside of the plastic. Heat from the molten plastic center is difficult to dissipate in time, and insufficient cooling can cause pellets to stick together or produce burrs after cutting. On the other hand, over-reliance on external cooling may prolong the production cycle and increase energy consumption. Therefore, we propose a plastic pelletizer with an integrated cooling mechanism. Utility Model Content

[0004] The purpose of this utility model is to overcome the shortcomings of the existing technology, adapt to the needs of reality, and provide a plastic pelletizer with a cooling mechanism to solve the technical problems of large internal and external temperature differences, easy particle adhesion, and high energy consumption caused by the single external cooling of traditional plastic pelletizers.

[0005] To solve the above-mentioned technical problems, this utility model provides the following technical solution: a plastic pelletizer with a cooling mechanism, comprising a cylinder, a cooling mechanism A, a merging mechanism, a cooling mechanism B, and a cutting mechanism. The cooling mechanism A is arranged at the upper end inside the cylinder, the merging mechanism is arranged in the middle inside the cylinder, the cooling mechanism B is arranged at the lower end inside the cylinder, and the cutting mechanism is arranged at the lower end outside the cylinder. The cutting mechanism is connected to the lower end of the cooling mechanism B, the upper end of the cooling mechanism B is connected to the lower end of the merging mechanism, and the merging mechanism is connected to the lower end of the cooling mechanism A.

[0006] The cooling mechanism A includes a plurality of channels A arranged at intervals along the circumferential direction of the upper end of the cylinder. A guide tube is arranged in the middle of the plurality of channels A. A guide block A is arranged on the upper surface of the guide tube, and the guide block A is in the shape of a cone.

[0007] Preferably, a flow divider cavity is arranged at one end of the channel A, and a guide block B is arranged in the middle of the flow divider cavity, and the guide block B is in the shape of a cone.

[0008] Preferably, a shunt tube A is connected to the upper side of the conduit, one end of the shunt tube A is connected to a liquid tube A, and a shunt tube B is connected to the lower side of the conduit, one end of the shunt tube B is connected to a liquid tube B.

[0009] Preferably, the merging mechanism includes a plurality of merging channels arranged at intervals along the circumferential direction of the inside of the cylinder, and rifling is arranged in the plurality of merging channels.

[0010] Preferably, the cooling mechanism B includes a plurality of channels B arranged at intervals along the circumferential direction of the lower end of the cylinder. Cooling chambers are formed on the sides of the plurality of channels B. The cooling chambers are in a spiral structure shape. A diversion pipe C is connected to the upper end of the plurality of channels B. One end of the diversion pipe C is connected to a liquid pipe C. A diversion pipe D is connected to the lower end of the plurality of channels B. One end of the diversion pipe D is connected to a liquid pipe D.

[0011] Preferably, the cutting mechanism includes a cover arranged at the lower end of the outer side of the cylinder, a support is arranged inside the cover, a drive motor is arranged in the middle of the support, a cutter is connected to the output end of the drive motor, and the cutter is tangent to the lower outer surface of the cylinder.

[0012] Compared with the prior art, the beneficial effects of this utility model are:

[0013] This invention, through the design of the channel A and the conduit structure, allows molten plastic liquid to flow into the channel A via the conical guide block B when it passes through the distribution chamber inside the cylinder. Then, the conical guide block A breaks it open and wraps around the conduit. At this time, the cooling medium circulating inside the conduit can evenly dissipate heat to the inside of the plastic liquid, promoting efficient heat conduction and forming a pre-shaped plastic strip. This structure, through a coordinated internal and external cooling method, optimizes the shortcomings of traditional single external cooling, improves cooling efficiency and the molding quality of the plastic granules after subsequent cutting.

[0014] This invention, through the design of a confluence channel and rifling structure, allows the plastic strips, which are separated by guide block A and guide tube in channel A, to enter the confluence channel and then spirally merge into a whole under the guidance of the rifling. The merged plastic strips are then transported into channel B. This design pre-integrates the split plastic strips, ensuring a uniform cross-section when entering channel B, avoiding the problem of uneven cooling caused by strip dispersion in traditional processes, thereby optimizing external cooling efficiency and particle forming consistency.

[0015] This invention, through the design of the channel B and cooling chamber structure, allows the combined plastic strip to enter the channel B, where its external heat is efficiently dissipated by the cooling medium circulating within the spiral-shaped cooling chamber. Combined with the continuous heat dissipation from the internal conduit, it achieves coordinated internal and external cooling. This structure makes the plastic strip cool more uniformly and stably, reducing the risk of adhesion and burrs during cutting. Compared to traditional full-coverage liquid cooling or air cooling methods, where a large temperature difference between the inside and outside may lead to delayed internal heat dissipation and require extended cooling time, this solution optimizes the heat dissipation path through layered cooling, shortening the cycle and reducing energy consumption. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the main appearance structure of this utility model;

[0017] Figure 2 This is a front view sectional view of the present invention.

[0018] Figure 3 This is a cross-sectional structural diagram of the cooling mechanism A of this utility model;

[0019] Figure 4 This is a cross-sectional structural diagram of the merging mechanism of this utility model;

[0020] Figure 5 This is a front view sectional view of the cooling mechanism B of this utility model.

[0021] Figure 6 This is a bottom sectional view of the cooling mechanism B of this utility model.

[0022] Explanation of the labels in the diagram:

[0023] 1. Cylinder; 2. Cooling mechanism A; 201. Channel A; 202. Guide tube; 203. Guide block A; 204. Diverting chamber; 205. Guide block B; 206. Diverting pipe A; 207. Liquid pipe A; 208. Diverting pipe B; 209. Liquid pipe B; 3. Merging mechanism; 301. Merging channel; 302. Rifling; 4. Cooling mechanism B; 401. Channel B; 402. Cooling chamber; 403. Diverting pipe C; 404. Liquid pipe C; 405. Diverting pipe D; 406. Liquid pipe D; 5. Cutting mechanism; 501. Cover; 502. Support; 503. Drive motor; 504. Cutter. Detailed Implementation

[0024] like Figures 1 to 6As shown, this utility model relates to a plastic pelletizer with a cooling mechanism, including a cylinder 1, a cooling mechanism A2, a merging mechanism 3, a cooling mechanism B4, and a cutting mechanism 5. The cooling mechanism A2 is arranged at the upper end inside the cylinder 1, the merging mechanism 3 is arranged in the middle inside the cylinder 1, the cooling mechanism B4 is arranged at the lower end inside the cylinder 1, and the cutting mechanism 5 is arranged at the lower end outside the cylinder 1. The cutting mechanism 5 is connected to the lower end of the cooling mechanism B4, the upper end of the cooling mechanism B4 is connected to the lower end of the merging mechanism 3, and the merging mechanism 3 is connected to the lower end of the cooling mechanism A2.

[0025] The cooling mechanism A2 includes multiple channels A201 spaced apart along the circumferential direction of the upper end of the inner cavity 1. A conduit 202 is arranged in the middle of each channel A201, and a guide block A203 is arranged on the upper surface of the conduit 202, with the guide block A203 having a conical shape. This invention, through the design of the channel A201 and conduit 202 structure, allows molten plastic liquid to flow through the diversion chamber 204 inside the cavity 1, and then be guided into the channel A201 by the conical guide block B205. The conical guide block A203 then breaks it open and wraps around the conduit 202. At this time, the cooling medium circulating inside the conduit 202 can uniformly dissipate heat from the inside of the plastic liquid, promoting efficient heat conduction and forming a pre-shaped plastic strip. This structure, through a synergistic internal and external cooling method, optimizes the shortcomings of traditional single external cooling, improving cooling efficiency and the molding quality of the plastic granules after subsequent cutting.

[0026] In an embodiment of this invention, a flow-diverting cavity 204 is arranged at one end of the channel A201, and a guide block B205 is arranged in the middle of the flow-diverting cavity 204, with the guide block B205 having a conical structure. This invention uses the conical guide block B205 within the flow-diverting cavity 204 to divert and guide the molten plastic, ensuring its uniform distribution within multiple channels A201. The conical structure reduces the plastic flow resistance, preventing turbulence or stagnation caused by excessively high local flow velocities, and also reduces the risk of uneven cooling due to temperature gradients. This design optimizes the initial molding path of the plastic strip, providing a stable foundation for subsequent internal and external coordinated cooling.

[0027] In an embodiment of this invention, a diversion pipe A206 is connected to the upper side of the conduit 202, and a liquid pipe A207 is connected to one end of the diversion pipe A206. A diversion pipe B208 is connected to the lower side of the conduit 202, and a liquid pipe B209 is connected to one end of the diversion pipe B208. This invention, through the design of the liquid pipe A207 and the diversion pipe A206, allows for the active delivery of the cooling liquid into the conduit 202, uniformly distributing the liquid into multiple conduits 202, achieving a uniform diversion input effect. Furthermore, the design of the diversion pipe B208 and the liquid pipe B209 allows the cooled plastic liquid within the multiple conduits 202 to be collected, transported, and discharged, achieving a collection and discharge effect.

[0028] In an embodiment of this invention, the merging mechanism 3 includes multiple merging channels 301 spaced apart along the circumferential direction inside the cylinder 1, with rifling 302 arranged within each channel 301. By designing the structure of the merging channels 301 and the rifling 302, this invention allows the plastic strips separated within the channel A201 by the guide block A203 and the guide tube 202 to enter the merging channel 301 and then spirally merge into a whole under the guidance of the rifling 302. The merged plastic strips are then conveyed into the channel B401. This design pre-integrates the split plastic strips, ensuring a uniform cross-section when entering the channel B401, avoiding the uneven cooling problem caused by strip dispersion in traditional processes, thereby optimizing external cooling efficiency and particle forming consistency.

[0029] In an embodiment of this utility model, the cooling mechanism B4 includes a plurality of channels B401 arranged at intervals along the circumferential direction of the lower end of the inner cavity of the cylinder 1. Cooling chambers 402 are provided on the sides of the plurality of channels B401. The cooling chambers 402 are spiral in shape. A diversion pipe C403 is connected to the upper end of the inner cavity of the plurality of channels B401. One end of the diversion pipe C403 is connected to a liquid pipe C404. A diversion pipe D405 is connected to the lower end of the inner cavity of the plurality of channels B401. One end of the diversion pipe D405 is connected to a liquid pipe D406. This invention, through the design of the channel B401 and cooling chamber 402 structure, allows the combined plastic strip to enter the channel B401, where its external heat is efficiently dissipated by the cooling medium circulating within the threaded cooling chamber 402. Combined with the continuous heat dissipation from the internal conduit 202, this achieves coordinated internal and external cooling. This structure makes the plastic strip cool more uniformly and stably, reducing the risk of adhesion and burrs during cutting. Compared to traditional full-coverage liquid cooling or air cooling methods, where a large temperature difference between the inside and outside can lead to delayed internal heat dissipation and require extended cooling time, this solution optimizes the heat dissipation path through layered cooling, shortening the cycle and reducing energy consumption. The design of the liquid pipe C404 and the diversion pipe C403 structure allows for the active delivery of the liquid used for cooling into the cooling chamber 402, evenly distributing the liquid to multiple cooling chambers 402, achieving a uniform flow input effect. The design of the diversion pipe D405 and the liquid pipe D406 structure allows the liquid that has cooled the plastic strip in multiple cooling chambers 402 to be collected, transported, and discharged, achieving a collection and discharge effect.

[0030] In an embodiment of this invention, the cutting mechanism 5 includes a cover 501 arranged at the lower end of the outer surface of the cylinder 1. A support 502 is arranged inside the cover 501, and a drive motor 503 is arranged in the middle of the support 502. The output end of the drive motor 503 is connected to a cutter 504, and the cutter 504 is tangential to the lower outer surface of the cylinder 1. The drive motor 503 of this invention drives the cutter 504 to precisely engage with the lower surface of the cylinder 1, achieving continuous and stable cutting of the plastic strip. The rotation speed of the cutter 504 is adjustable to adapt to different hardnesses of the cooled and formed plastic strips, reducing burrs or dimensional deviations caused by cutting vibration. The cover 501 integrates protection and flow guidance functions to prevent debris from splashing. At the same time, the compact structural design reduces maintenance complexity and improves the reliability of equipment operation.

[0031] Working Principle: This embodiment provides a plastic pelletizer with a cooling mechanism. During use, the operator must first install it on the output end of the hot melt machine. The flange mounted on the upper part of the cylinder 1 is bolted to the flange at the output end of the hot melt machine. After the cylinder 1 is fixedly installed on the output end of the hot melt machine, the invention is ready for use. The hot melt machine melts the plastic into a liquid, which is then transmitted through the output end to the distribution chamber 204 inside the cylinder 1. The liquid plastic entering the distribution chamber 204 is guided by a conical guide block. B205 guides the liquid to multiple channels A201. The plastic liquid entering the channels A201 is broken open by the conical guide block A203 and encloses the conduit 202. While enclosing the conduit 202, the plastic liquid also flows within the channels A201. Meanwhile, the cooling liquid is pumped by the pump body through the liquid pipe A207 to the distribution pipe A206, and then evenly distributed to the multiple conduits 202. Once the liquid enters the conduit 202, it will... The temperature of the molten plastic in channel A201 is carried away by conduction, thereby cooling the middle of the molten plastic and forming a preliminary plastic strip. This cooled plastic strip is then transported to the interior of channel 301. Once inside channel 301, the plastic strip is twisted and merged together by the helical rifling 302. The plastic strips, separated by the conical guide block A203, are then merged together and continue to be transported into channel B401. At this point, the cooling liquid is transferred through liquid pipe C404 to… Inside the distribution pipe C403, the liquid is evenly distributed to multiple cooling chambers 402. The liquid entering the cooling chambers 402 externally cools the plastic strip in the channel B401, thus completing the internal and external cooling of the plastic strip. After the plastic strip is cooled and formed, it will be pushed out of the channel B401 by the subsequent plastic liquid. When the cooled and formed plastic strip is removed from the channel B401, the cutter 504 driven by the drive motor 503 will cut it into granules.

[0032] The embodiments disclosed herein are preferred embodiments, but are not limited thereto. Those skilled in the art can readily grasp the spirit of this utility model based on the above embodiments and make different extensions and variations. However, as long as they do not depart from the spirit of this utility model, they are all within the protection scope of this utility model.

Claims

1. A plastic pelletizer having a cooling mechanism, characterized by: It includes a cylinder (1), a cooling mechanism A (2), a merging mechanism (3), a cooling mechanism B (4), and a cutting mechanism (5). The cooling mechanism A (2) is arranged inside the upper part of the cylinder (1), the merging mechanism (3) is arranged inside the middle of the cylinder (1), the cooling mechanism B (4) is arranged inside the lower part of the cylinder (1), the cutting mechanism (5) is arranged outside the lower part of the cylinder (1), and the cutting mechanism (5) is connected to the lower part of the cooling mechanism B (4). The upper part of the cooling mechanism B (4) is connected to the lower part of the merging mechanism (3), and the merging mechanism (3) is connected to the lower part of the cooling mechanism A (2). The cooling mechanism A (2) includes a plurality of channels A (201) arranged at intervals along the circumferential direction of the upper end of the inner cavity (1). A conduit (202) is arranged in the middle of the plurality of channels A (201). A guide block A (203) is arranged on the upper surface of the conduit (202), and the guide block A (203) is in the shape of a cone.

2. The plastic pelletizer with cooling mechanism according to claim 1, wherein: One end of the channel A (201) is provided with a flow divider cavity (204), and a guide block B (205) is provided in the middle of the flow divider cavity (204), and the guide block B (205) is in the shape of a cone.

3. The plastic pelletizer with cooling mechanism as claimed in claim 2, wherein: The upper side of the conduit (202) is connected to a shunt tube A (206), one end of the shunt tube A (206) is connected to a liquid tube A (207), the lower side of the conduit (202) is connected to a shunt tube B (208), one end of the shunt tube B (208) is connected to a liquid tube B (209).

4. The plastic pelletizer with a cooling mechanism according to claim 3, wherein: The merging mechanism (3) includes a plurality of merging channels (301) arranged at intervals along the circumferential direction of the middle of the interior of the cylinder (1), and rifling (302) is arranged in the plurality of merging channels (301).

5. The plastic pelletizer with cooling mechanism as set forth in claim 4, wherein: The cooling mechanism B (4) includes a plurality of channels B (401) arranged at intervals along the circumferential direction of the lower end of the inner cavity of the cylinder (1). Cooling chambers (402) are opened on the sides of the plurality of channels B (401). The cooling chambers (402) are spiral in shape. A diversion pipe C (403) is connected to the upper end of the interior of the plurality of channels B (401). One end of the diversion pipe C (403) is connected to a liquid pipe C (404). A diversion pipe D (405) is connected to the lower end of the interior of the plurality of channels B (401). One end of the diversion pipe D (405) is connected to a liquid pipe D (406).

6. The plastic pelletizer with a cooling mechanism according to claim 5, wherein: The cutting mechanism (5) includes a cover (501) arranged at the lower end of the outer side of the cylinder (1), a bracket (502) arranged inside the cover (501), a drive motor (503) arranged in the middle of the bracket (502), a cutter (504) connected to the output end of the drive motor (503), and the cutter (504) is tangent to the lower outer surface of the cylinder (1).

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