Cooling device for plastic extruding machine

Abstract

The utility model relates to a cooling device for a plastic extruding machine in the field of cooling devices, which comprises a plastic extruding machine body, a plastic extruding cylinder and an extruding head are arranged on the plastic extruding machine body, a water cooling device is arranged in the plastic extruding machine body, the water cooling device comprises a heat exchange sleeve, a water tank and a plate heat exchanger, and a liquid cooling pipe groove is arranged in the heat exchange sleeve. A primary cooling pipeline and a secondary cooling pipeline are arranged on the water tank, the two ends of the primary cooling pipeline and the two ends of the secondary cooling pipeline are communicated with the water tank, the middle section of the primary cooling pipeline is connected with the liquid cooling pipe groove in a clamped mode, the middle section of the secondary cooling pipeline penetrates through the plate heat exchanger, and the secondary cooling pipeline exchanges heat with the plate heat exchanger. The surface of the extrusion head is detachably sleeved with the heat exchange sleeve, the inner wall of the heat exchange sleeve is attached to the outer wall of the extrusion head, a detachable baffle is arranged at the end, away from the extrusion molding cylinder, of the extrusion head and used for fixing the position of the heat exchange sleeve, and the heat exchange sleeve can be easily taken down when the extrusion head needs to be maintained or replaced. Therefore, the maintenance efficiency is greatly improved, and the maintenance cost is reduced.

Description

TECHNICAL FIELD

[0001] The utility model relates to a cooling device field, especially a cooling device for extruding machine. BACKGROUND

[0002] Cooling device is a kind of equipment for reducing the temperature of equipment or material, and is widely used in various industrial fields.In the plastic processing industry, cooling device is an important device that cannot be dispensed with.Extruding machine is the common equipment in plastic processing industry, and its working principle is to melt plastic raw material by heating and extrude the melted plastic into fixed shape through extruding head, and cooling device is an indispensable part in the running process of extruding machine.Through the action of cooling device, the extruded plastic can be cooled and shaped quickly, and the expected size and shape are achieved.Meanwhile, cooling device can effectively prolong the service life of extruding machine and reduce equipment failure and damage caused by overheating.Therefore, the selection and configuration of cooling device are particularly important in the design and manufacture process of extruding machine.

[0003] The existing extruding machine cooling device has some defects.The traditional cooling device often adopts fixed heat exchange sleeve, which makes the operator need to disassemble the whole extruding machine body when needing to maintain or replace the heat exchange sleeve, not only the operation is complicated, but also the maintenance cost is greatly improved.And because the heat exchange sleeve is fixed, it cannot be flexibly replaced according to different production requirements and the specifications of extruding head, which limits the application range of cooling device.When the extruding head needs to be replaced or upgraded, the whole cooling system often needs to be greatly modified or adjusted, which not only wastes time and effort, but also increases the difficulty and cost of equipment updating and upgrading. UTILITY MODEL CONTENTS

[0004] In order to overcome the deficiencies of the prior art, the utility model provides a cooling device for extruding machine, which can effectively solve the technical problem that the cooling device needs to be greatly modified or adjusted when replacing the extruding head.

[0005] The technical scheme adopted by the utility model to solve its technical problems is:

[0006] A cooling device for an extruder includes an extruder body, on which an extrusion cylinder and an extrusion head are mounted. The extrusion cylinder melts plastic and extrudes it from the extrusion head. The plastic is extruded through the extrusion head in a fixed shape and cooled and solidified. A water-cooling device is installed inside the extruder body, comprising a heat exchange jacket, a water tank, and a plate heat exchanger. A liquid-cooled pipe groove is installed inside the heat exchange jacket. Primary cooling pipes and secondary cooling pipes are installed on the water tank, with both ends of the primary and secondary cooling pipes connected to... The water tank is connected, the middle section of the primary cooling pipe is snapped into the liquid cooling pipe groove, the middle section of the secondary cooling pipe passes through the plate heat exchanger, the primary cooling pipe exchanges heat with the heat exchange jacket, water pumps are installed in both the primary and secondary cooling pipes, the secondary cooling pipe exchanges heat with the plate heat exchanger, the heat exchange jacket is detachably fitted on the surface of the extruder head, and the inner wall of the heat exchange jacket fits against the outer wall of the extruder head, a detachable baffle is provided at the end of the extruder head away from the extrusion cylinder, the baffle is used to fix the position of the heat exchange jacket.

[0007] Furthermore, a protective cover is provided on the outside of the extrusion cylinder, an air inlet is provided at the bottom of the protective cover, an exhaust fan is provided at the top of the protective cover, a heat dissipation channel is formed between the surface of the extrusion cylinder and the inner wall of the protective cover, and a closable louver is provided at the air inlet.

[0008] Furthermore, the end of the extrusion head away from the extrusion cylinder is provided with an external thread and a fixing nut. After the fixing nut is screwed into the extrusion head, it presses against the baffle and the heat exchange sleeve.

[0009] Furthermore, the surface of the extrusion head is provided with a positioning groove, and the inner wall of the heat exchange sleeve and the baffle is provided with a positioning block. When the heat exchange sleeve and the baffle are installed on the extrusion head, the positioning block is aligned with the positioning groove, and the positioning block slides along the positioning groove.

[0010] Furthermore, the plate heat exchanger is disposed on the side wall of the extruder body, and one side of the plate heat exchanger is provided with heat dissipation dispersion to accelerate airflow.

[0011] Furthermore, the surface of the heat exchange jacket is provided with air-cooled fins.

[0012] Compared with existing technologies, the advantages of this invention are as follows: The heat exchange sleeve is detachably fitted onto the surface of the extrusion head, allowing for easy removal when the extrusion head needs maintenance or replacement, thus significantly improving maintenance efficiency and reducing maintenance costs. When the extrusion head needs replacement or upgrade, the operator can remove the heat exchange sleeve from the extrusion head, assemble the new extrusion head with the extrusion barrel, and then install the heat exchange sleeve on the new extrusion head. Furthermore, the middle section of the primary cooling pipe is snapped into the liquid cooling pipe groove. When the new extrusion head and heat exchange sleeve are incompatible, a suitable heat exchange sleeve can be selected or customized according to the specifications and model of the new extrusion head, and then the primary cooling pipe can be combined with the new heat exchange sleeve. No modifications to other components of the water cooling device are required, greatly reducing the difficulty and cost of equipment upgrades and expanding the applicability of the heat exchange sleeve. Attached Figure Description

[0013] Figure 1 This is a schematic diagram of the structure of this utility model;

[0014] Figure 2 This is a schematic diagram of the assembly of the extruder head and the heat exchanger jacket in this utility model;

[0015] Figure 3 This is a schematic diagram of the coolant flow in the water-cooling device of this utility model;

[0016] Figure 4 This is a schematic diagram of gas flow inside the protective cover in this utility model;

[0017] The numbers in the diagram are: 1-extruder body, 2-extrusion cylinder, 3-extrusion head, 301-positioning groove, 4-water cooling device, 401-heat exchange jacket, 402-water tank, 403-plate heat exchanger, 404-primary cooling pipeline, 405-secondary cooling pipeline, 406-water pump, 5-baffle, 501-positioning block, 6-fixing nut, 7-protective cover, 8-air inlet, 9-exhaust fan. Detailed Implementation

[0018] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0019] The following is combined Figures 1-4 A detailed description of a cooling device for an extruder according to this utility model is provided below:

[0020] A cooling device for an extruder includes an extruder body 1, on which an extrusion cylinder 2 and an extrusion head 3 are mounted. The extrusion cylinder 2 is used to melt plastic and extrude it from the extrusion head 3. The plastic is extruded through the extrusion head 3 in a fixed shape and cooled and solidified. The device is characterized in that a water-cooling device 4 is installed inside the extruder body 1. The water-cooling device 4 includes a heat exchange jacket 401, a water tank 402, and a plate heat exchanger 403. A liquid cooling pipe groove is installed inside the heat exchange jacket 401. A primary cooling pipe 404 and a secondary cooling pipe 405 are installed on the water tank 402. Both ends of the primary cooling pipe 404 and the secondary cooling pipe 405 are connected to the water tank 402. The middle section of the primary cooling pipe 404 is connected to the liquid cooling pipe groove. The middle section of the secondary cooling pipe 405 passes through the plate heat exchanger 403. Both the primary cooling pipe 404 and the secondary cooling pipe 405 are equipped with... A water pump 406, a primary cooling pipe 404 and a heat exchanger jacket 401 exchange heat, and a secondary cooling pipe 405 and a plate heat exchanger 403 exchange heat. The heat exchanger jacket 401 is detachably fitted onto the surface of the extrusion head 3, and the inner wall of the heat exchanger jacket 401 is in contact with the outer wall of the extrusion head 3. A detachable baffle 5 is provided at the end of the extrusion head 3 away from the extrusion cylinder 2. The baffle 5 is used to fix the position of the heat exchanger jacket 401. The end of the extrusion head 3 away from the extrusion cylinder 2 is provided with an external thread and a fixing nut 6. After the fixing nut 6 is screwed onto the extrusion head 3, it presses the baffle 5 and the heat exchanger jacket 401 together. The surface of the extrusion head 3 is provided with a positioning groove 301. The inner walls of the heat exchanger jacket 401 and the baffle 5 are provided with positioning blocks 501. When the heat exchanger jacket 401 and the baffle 5 are installed on the extrusion head 3, the positioning blocks 501 are aligned with the positioning groove 301 and slide along the positioning groove 301.

[0021] The heat exchange jacket 401 is detachably fitted onto the surface of the extruder head 3, allowing for easy maintenance or replacement without disassembling the entire extruder body 1. This significantly improves maintenance efficiency and reduces costs. Because the heat exchange jacket 401 is detachable, it can be flexibly replaced according to different production needs and the specifications of the extruder head 3, making it suitable for various types of extruder heads 3. When the extruder head 3 needs replacement or upgrade, the operator can simply remove the heat exchange jacket 401 from the extruder head 3, assemble the new extruder head 3 with the extrusion barrel, and then reinstall the heat exchange jacket 401. Alternatively, a corresponding heat exchange jacket 401 can be selected or customized according to the specifications and model of the new extruder head 3 for installation. No other parts of the water cooling device 4 need to be modified, greatly reducing the difficulty and cost of equipment upgrades.

[0022] A protective cover 7 is provided on the outside of the extrusion cylinder 2. An air inlet 8 is provided at the bottom of the protective cover 7, and an exhaust fan 9 is provided at the top of the protective cover 7. A heat dissipation channel is formed between the surface of the extrusion cylinder 2 and the inner wall of the protective cover 7. A closable louver is provided at the air inlet 8. By providing a protective cover 7 on the outside of the extrusion cylinder 2, the extrusion cylinder 2 can be kept warm, thereby increasing the heating rate of the extrusion cylinder 2. When the temperature of the extrusion cylinder 2 is too high, the louver and the exhaust fan 9 will automatically open to lower the temperature of the extrusion cylinder 2. The louver and the exhaust fan 9 can adjust the air intake as needed, thereby improving the flexibility and efficiency of heat dissipation and ensuring the temperature stability during the extrusion process.

[0023] The surface of the heat exchange jacket 401 is provided with air-cooled fins, allowing the heat exchange jacket 401 to dissipate heat through air cooling. The plate heat exchanger 403 is disposed on the side wall of the extruder body 1, and one side of the plate heat exchanger 403 is provided with heat dissipation dispersion to accelerate airflow and improve heat dissipation efficiency.

[0024] Heat dissipation process: The heat of the plastic inside the extruder 3 is transferred to the extruder 3. The heat exchange jacket 401 absorbs the heat of the extruder 3 and exchanges heat with the cooling water in the primary cooling pipe 404. The water pump 406 in the primary cooling pipe 404 makes the cooling water circulate in the primary cooling pipe 404 and the water tank 402. The water pump 406 in the primary cooling pipe 404 makes the cooling water in the water tank 402 flow in the secondary cooling pipe 405. The heat of the cooling water is dissipated into the air through the plate heat exchanger 403.

[0025] It will be apparent to those skilled in the art that this invention is not limited to the details of the exemplary embodiments described above, and that it can be implemented in other specific forms without departing from the spirit or essential characteristics of this invention. Therefore, the embodiments should be considered illustrative and non-limiting in all respects, and the scope of this invention is defined by the appended claims rather than the foregoing description. Thus, it is intended that all variations falling within the meaning and scope of equivalents of the claims be included within this invention. No reference numerals in the claims should be construed as limiting the scope of the claims.

Claims

1. A cooling device for an extruder, comprising an extruder body, an extrusion cylinder and an extrusion head disposed on the extruder body, the extrusion cylinder being used to melt plastic and extrude it from the extrusion head, the plastic being extruded through the extrusion head in a fixed shape and cooled and solidified, characterized in that: The extruder is equipped with a water-cooling device, which includes a heat exchange jacket, a water tank, and a plate heat exchanger. The heat exchange jacket contains a liquid cooling tube groove, and the water tank has a primary cooling pipe and a secondary cooling pipe. Both ends of the primary and secondary cooling pipes are connected to the water tank. The middle section of the primary cooling pipe is snapped into the liquid cooling tube groove, and the middle section of the secondary cooling pipe passes through the plate heat exchanger. The primary cooling pipe exchanges heat with the heat exchange jacket, and the secondary cooling pipe exchanges heat with the plate heat exchanger. A water pump is installed in both the primary and secondary cooling pipes. The heat exchange jacket is detachably fitted onto the surface of the extruder head, and the inner wall of the heat exchange jacket is in contact with the outer wall of the extruder head. A detachable baffle is provided at the end of the extruder head away from the extrusion cylinder to fix the position of the heat exchange jacket.

2. The cooling device for an extruder according to claim 1, characterized in that: The extrusion cylinder is provided with a protective cover on its outer side. The bottom of the protective cover is provided with an air inlet and the top of the protective cover is provided with an exhaust fan. A heat dissipation channel is formed between the surface of the extrusion cylinder and the inner wall of the protective cover. A closable louver is provided at the air inlet.

3. The cooling device for an extruder according to claim 1, characterized in that: The end of the extrusion head away from the extrusion cylinder is provided with an external thread and a fixing nut. After the fixing nut is screwed into the extrusion head, it presses against the baffle and heat exchange sleeve.

4. A cooling device for an extruder according to any one of claims 1-3, characterized in that: The surface of the extrusion head is provided with a positioning groove, and the inner wall of the heat exchange sleeve and the baffle is provided with a positioning block. When the heat exchange sleeve and the baffle are installed on the extrusion head, the positioning block is aligned with the positioning groove and slides along the positioning groove.

5. A cooling device for an extruder according to any one of claims 1-3, characterized in that: The plate heat exchanger is installed on the side wall of the extruder body, and one side of the plate heat exchanger is provided with heat dissipation dispersion to accelerate airflow.

6. A cooling device for an extruder according to any one of claims 1-3, characterized in that: The surface of the heat exchange jacket is provided with air-cooled fins.

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