Multi-section temperature control cooling device for die head of plastic extruder

Abstract

The utility model relates to the technical field of cooling devices, in particular to a multi-section temperature control cooling device for a die head of a plastic extruder, which comprises a die head main body, a first cooling component arranged on the outer surface of the die head main body, an air duct arranged on the outer surface of the die head main body, and an outer barrel shell arranged on the outer wall of the air duct and sleeved outside the die head main body; a second cooling assembly is arranged in the outer wall of the die head main body and comprises a cooling water channel formed in the outer wall of the die head main body, and a water outlet pipe communicated with the cooling water channel is arranged at the top of the die head main body; a third cooling assembly is arranged between the second cooling assembly and the first cooling assembly and comprises cooling plates arranged on the outer surface of the die head body in the radial direction, and the cooling plates are distributed in a circular ring array mode. Multi-stage cooling is formed through air cooling of the first cooling assembly, water cooling of the second cooling assembly and evaporative cooling of the third cooling assembly, the heat dissipation efficiency of the die head is improved, and the temperature stability of the die head in the extrusion process is effectively controlled.

Description

Technical Field

[0001] This utility model relates to the field of cooling device technology, and in particular to a multi-stage temperature control cooling device for the die head of a plastic extruder. Background Technology

[0002] In the plastic extrusion process, the die head is a key component in the molding process and needs to be in a high-temperature working state for a long time. The die head will heat up rapidly during the heating process, and its temperature needs to be precisely controlled during the product molding process to ensure the fluidity of the plastic melt, the molding stability and the dimensional accuracy of the product.

[0003] However, traditional die head cooling methods mostly use single water cooling or air cooling, which has low cooling efficiency and can easily lead to uneven local temperature of the die head, resulting in problems such as product deformation, surface defects or extrusion fluctuations. To address this, we propose a multi-stage temperature control cooling device for the die head of a plastic extruder. Utility Model Content

[0004] Given that the above-mentioned or existing technologies mostly use a single water cooling or air cooling method for the cooling of the die head, the cooling efficiency is low and it is easy to cause uneven local temperature of the die head, which can lead to product deformation, surface defects or extrusion fluctuations. Therefore, this utility model is proposed.

[0005] To solve the above-mentioned technical problems, this utility model provides the following technical solution:

[0006] A multi-stage temperature control and cooling device for the die head of a plastic extruder includes a die head body, and a first cooling component is provided on the outer surface of the die head body, including a duct provided on the outer surface of the die head body, and an outer shell sleeved around the outside of the die head body is provided on the outer wall of the duct.

[0007] A second cooling assembly is provided inside the outer wall of the die head body, including a cooling water channel opened inside the outer wall of the die head body, and a water outlet pipe connected to the cooling water channel is provided on the top of the die head body.

[0008] A third cooling component is provided between the second cooling component and the first cooling component, including cooling plates radially disposed on the outer surface of the die head body, the cooling plates being distributed in a circular array.

[0009] As a preferred embodiment of the multi-stage temperature control and cooling device for the die head of the plastic extruder of this utility model, wherein: an air inlet pipe is connected to the bottom of the air duct, an air outlet is opened in the air duct facing the inside of the outer cylinder shell, and a vent is opened at the end of the outer cylinder shell away from the air duct.

[0010] As a preferred embodiment of the multi-stage temperature control and cooling device for the die head of the plastic extruder of this utility model, wherein: the inner wall of the cooling water channel is provided with partitions, the partitions are axially spaced, and the partition located in the center is a complete ring, while the remaining partitions are rings with notches, and baffles are axially provided between adjacent partitions, with the notches of adjacent partitions located on both sides of the baffles.

[0011] As a preferred embodiment of the multi-stage temperature control and cooling device for the die head of the plastic extruder of this utility model, wherein: the die head body is provided with water inlet pipes at both ends of the cooling water channel, one end of the water inlet pipe penetrates the outer cylinder shell, and the other end of the water inlet pipe is closed and connected to each other by a connecting pipe.

[0012] As a preferred embodiment of the multi-stage temperature control and cooling device for the die head of the plastic extruder of this utility model, a water guide plate is provided on the top surface of the die head body and inside the outer cylinder shell, and two sets of water outlet pipes are provided and located on both sides of the middle partition plate, and the water guide plate and the water outlet pipes are interconnected.

[0013] As a preferred embodiment of the multi-stage temperature control and cooling device for the die head of the plastic extruder of this utility model, wherein: the bottom of the cooling plate is provided with through holes spaced apart along the length direction, the top of the cooling plate is connected to the inner circumferential surface of the outer cylinder shell, and the bottom of the outer cylinder shell is connected to a drain pipe.

[0014] As a preferred embodiment of the multi-segment temperature control and cooling device for the die head of the plastic extruder of this utility model, the air outlet is provided with multiple sets arranged in a circular array, the air outlet corresponds to the interval of the cooling plate, and the outer surface of the cooling plate is provided with grooves extending to the bottom.

[0015] As a preferred embodiment of the multi-stage temperature control and cooling device for the die head of the plastic extruder of this utility model, wherein: the side wall of the water guide plate is provided with an overflow hole, and the through holes of the adjacent cooling plates are staggered.

[0016] The beneficial effects of the multi-stage temperature control cooling device for the die head of the plastic extruder of this utility model are as follows: This utility model forms a multi-stage continuous cooling through air cooling of the first cooling component, water cooling of the second cooling component, and evaporative cooling of the third cooling component. The three methods of air cooling, water cooling and evaporative cooling complement each other, which not only improves the heat dissipation efficiency of the die head, but also effectively controls the temperature stability of the die head during the extrusion process. Attached Figure Description

[0017] To more clearly illustrate the technical solutions of the embodiments of this utility model, the drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0018] Figure 1 This is a schematic diagram of the overall structure of the multi-stage temperature control and cooling device for the die head of a plastic extruder.

[0019] Figure 2 This is a schematic diagram of the cooling plate structure of a multi-stage temperature-controlled cooling device for the die head of a plastic extruder.

[0020] Figure 3 This is a schematic diagram of the air duct structure of a multi-stage temperature control cooling device for the die head of a plastic extruder.

[0021] Figure 4 This is a schematic diagram of the cooling water channel structure of a multi-stage temperature-controlled cooling device for the die head of a plastic extruder.

[0022] Figure 5 This is a schematic diagram of the water guide plate structure of the multi-stage temperature control cooling device for the die head of a plastic extruder.

[0023] Figure 6 This is a schematic diagram of the cooling plate structure of a multi-stage temperature-controlled cooling device for the die head of a plastic extruder.

[0024] The components are: 1. Mold head body; 2. Outer shell; 3. Air duct; 4. Air inlet pipe; 5. Vent hole; 6. Water inlet pipe; 7. Drain pipe; 8. Air outlet; 9. Cooling plate; 10. Connecting pipe; 11. Water outlet pipe; 12. Water guide plate; 13. Overflow hole; 14. Cooling water channel; 15. Partition plate; 16. Baffle plate; 17. Through hole; 18. Cable trough. Detailed Implementation

[0025] To make the above-mentioned objectives, features and advantages of this utility model more apparent and understandable, the specific embodiments of this utility model will be described in detail below with reference to the accompanying drawings.

[0026] Many specific details are set forth in the following description in order to provide a full understanding of the present invention. However, the present invention may also be implemented in other ways different from those described herein. Those skilled in the art can make similar extensions without departing from the spirit of the present invention. Therefore, the present invention is not limited to the specific embodiments disclosed below.

[0027] Secondly, the term "an embodiment" or "embodiment" as used herein refers to a specific feature, structure, or characteristic that may be included in at least one implementation of the present invention. The phrase "in one embodiment" appearing in different places in this specification does not necessarily refer to the same embodiment, nor is it a single or selective embodiment that excludes other embodiments.

[0028] Example

[0029] Reference Figures 1 to 6 This is the first embodiment of the present invention. This embodiment provides a multi-stage temperature control and cooling device for the die head of a plastic extruder. Through the air cooling of the first cooling component, the water cooling of the second cooling component, and the evaporative cooling of the third cooling component, a multi-stage continuous cooling is formed, which not only improves the heat dissipation efficiency of the die head, but also effectively controls the temperature stability of the die head during the extrusion process.

[0030] Specifically, a multi-stage temperature control and cooling device for the die head of a plastic extruder includes a die head body 1. A first cooling component is provided on the outer surface of the die head body 1, including an air duct 3 disposed on the outer surface of the die head body 1. An outer shell 2 is provided on the outer wall of the air duct 3 and fitted outside the die head body 1. The air duct 3 accelerates the air flow near the surface of the die head body 1, and the outer shell 2 defines the air flow path.

[0031] A second cooling assembly is provided inside the outer wall of the mold head body 1, including a cooling water channel 14 opened inside the outer wall of the mold head body 1. A water outlet pipe 11 connected to the cooling water channel 14 is provided on the top of the mold head body 1. Cooling water is introduced into the cooling water channel 14 to exchange heat and cool the mold head body 1.

[0032] A third cooling component is provided between the second cooling component and the first cooling component, including a cooling plate 9 radially disposed on the outer surface of the mold head body 1. The cooling plates 9 are arranged in a circular array. The cooling water of the cooling water channel 14 flows out from the water outlet pipe 11 and is then distributed along the surface of the mold head body 1 to the cooling plate 9. The air accelerated by the air duct 3 accelerates the evaporation of water on the surface of the cooling plate 9. The outer shell 2 prevents water leakage.

[0033] Furthermore, an air inlet pipe 4 is connected to the bottom of the air duct 3, and an air outlet 8 is opened in the air duct 3 facing the inside of the outer shell 2. A vent hole 5 is opened at the end of the outer shell 2 away from the air duct 3. The air duct 3 is connected to an external air source through the air inlet pipe 4, and then releases air into the outer shell 2 through the air outlet 8 to accelerate air circulation. The outer shell 2 completes the air flow through the vent hole 5, thereby removing heat.

[0034] The inner wall of the cooling water channel 14 is provided with baffles 15. The baffles 15 are axially spaced, and the baffle 15 located in the center is a complete ring. The remaining baffles 15 are rings with notches. A baffle 16 is axially arranged between adjacent baffles 15. The notches of the adjacent baffles 15 are located on both sides of the baffle 16. The cooling water is blocked by the baffles 15 in the cooling water channel 14. Because the baffles 16 block the notches of the adjacent baffles 15, the cooling water needs to go around the cavity formed by the adjacent baffles 15 before entering the next space, so that the cooling water coverage is more comprehensive.

[0035] The main body 1 of the mold head is connected to the two ends of the cooling water channel 14 with water inlet pipes 6. One end of the water inlet pipe 6 penetrates the outer shell 2, while the other end of the water inlet pipe 6 is closed and connected to each other with a connecting pipe 10. The exposed water inlet pipe 6 achieves synchronous water supply to the two sets of water inlet pipes 6 through the connecting pipe 10.

[0036] A water guide plate 12 is provided on the top surface of the mold head body 1 and inside the outer shell 2. Two sets of water outlet pipes 11 are provided and located on both sides of the middle partition plate 15 respectively. The water guide plate 12 and the water outlet pipes 11 are interconnected. The cooling water flowing out of the water outlet pipes 11 is further diffused on the surface of the mold head body 1 through the water guide plate 12.

[0037] The bottom of the cooling plate 9 is provided with through holes 17 spaced apart along the length direction. The top of the cooling plate 9 is connected to the inner circumferential surface of the outer shell 2. The cooling plate 9 will not block the flow of cooling water along the surface of the mold body 1 through the through holes 17. The bottom of the outer shell 2 is connected to a drain pipe 7. After the cooling water flows over the surface of the mold body 1, it gathers at the bottom of the outer shell 2 and is collected and discharged through the drain pipe 7.

[0038] The air outlet 8 is provided with multiple sets of circular arrays, and the air outlet 8 corresponds to the interval of the cooling plate 9. The outer surface of the cooling plate 9 is provided with a groove 18 extending to the bottom. The groove 18 draws water from the surface of the mold head body 1 to the surface of the cooling plate 9 through capillary action, thus accelerating the evaporation of water.

[0039] The side wall of the water guide plate 12 is provided with an overflow hole 13, and the through holes 17 of the adjacent cooling plates 9 are staggered to prolong the residence time of water on the surface of the mold head body 1 and extend the evaporation time of water.

[0040] In use, the first stage of cooling uses only the air duct 3, the second stage of cooling uses only the cooling water channel 14, and the third stage of cooling uses the cooling plate 9 in conjunction with the cooling water channel 14 and the air duct 3. The air cooling of the first cooling component, the water cooling of the second cooling component, and the evaporative cooling of the third cooling component form a multi-stage cooling system.

[0041] In summary, this utility model combines air cooling, water cooling, and evaporative cooling, which complement each other to form a multi-stage continuous cooling system. This not only improves the heat dissipation efficiency of the die head and extends the service life of the equipment, but also effectively controls the temperature stability of the die head during the extrusion process, avoiding product defects caused by local overheating.

[0042] It should be noted that the above embodiments are only used to illustrate the technical solution of this utility model and are not intended to limit it. Although this utility model has been described in detail with reference to preferred embodiments, those skilled in the art should understand that modifications or equivalent substitutions can be made to the technical solution of this utility model without departing from the spirit and scope of the technical solution of this utility model, and all such modifications or substitutions should be covered within the scope of the claims of this utility model.

Claims

1. A multi-stage temperature control cooling device for a die of a plastic extruder comprising a die body (1), characterized in that: The outer surface of the mold head body (1) is provided with a first cooling component, including a wind duct (3) provided on the outer surface of the mold head body (1), and the outer wall of the wind duct (3) is provided with an outer shell (2) that is sleeved on the outside of the mold head body (1); The outer wall of the mold head body (1) is provided with a second cooling component, including a cooling water channel (14) opened in the outer wall of the mold head body (1), and the top of the mold head body (1) is provided with a water outlet pipe (11) connected to the cooling water channel (14). A third cooling component is provided between the second cooling component and the first cooling component, including a cooling plate (9) radially disposed on the outer surface of the mold head body (1), wherein the cooling plate (9) is distributed in a circular array.

2. The multi-zone temperature control cooling device for the die of a plastic extruder as claimed in claim 1, wherein: The bottom of the air duct (3) is connected to an air inlet pipe (4), and the air duct (3) has an air outlet (8) facing the inside of the outer shell (2). The outer shell (2) has a vent hole (5) at the end away from the air duct (3).

3. The multi-zone temperature control cooling device for the die of a plastic extruder as claimed in claim 1, wherein: The inner wall of the cooling water channel (14) is provided with baffles (15), the baffles (15) are axially spaced, and the baffle (15) located in the center is a complete ring, while the other baffles (15) are rings with notches. A baffle (16) is axially provided between adjacent baffles (15), and the notches of adjacent baffles (15) are located on both sides of the baffle (16).

4. The multi-zone temperature control cooling device for the die of a plastic extruder as claimed in claim 3, wherein: The mold head body (1) is connected to the two ends of the cooling water channel (14) by water inlet pipes (6), one end of which penetrates the outer shell (2), and the other end of which is closed and connected by a connecting pipe (10).

5. The multi-zone temperature control cooling device for the die of a plastic extruder as claimed in claim 3, wherein: A water guide plate (12) is provided on the top surface of the mold head body (1) and inside the outer shell (2). Two sets of water outlet pipes (11) are provided and are located on both sides of the central partition (15). The water guide plate (12) and the water outlet pipe (11) are interconnected.

6. The multi-zone temperature control cooling device for the die of a plastic extruder as claimed in claim 5, wherein: The bottom of the cooling plate (9) is provided with through holes (17) spaced apart along the length direction. The top of the cooling plate (9) is connected to the inner circumferential surface of the outer shell (2). The bottom of the outer shell (2) is connected to a drain pipe (7).

7. The multi-zone temperature control cooling device for the die of a plastic extruder as claimed in claim 2, wherein: The air outlet (8) is provided with multiple sets arranged in a circular array, and the air outlet (8) corresponds to the interval of the cooling plate (9). The outer surface of the cooling plate (9) is provided with a groove (18) extending to the bottom.

8. The multi-zone temperature control cooling device for the die of a plastic extruder as claimed in claim 6, wherein: The sidewall of the water guide plate (12) is provided with an overflow hole (13), and the through holes (17) of the adjacent cooling plate (9) are staggered.

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