Multi-layer extruder with cooling structure

Abstract

This utility model discloses a multi-layer extruder with a cooling structure, including an upper base plate and a lower base plate. The upper base plate is installed at the bottom of the heater, and a serpentine cold water trough is formed at the bottom of the upper base plate. A slot is provided at the bottom of the upper base plate, and the lower base plate is inserted into the slot. The lower base plate and the upper base plate are fixed together by multiple evenly distributed bolts. A cold water inlet and a cold water outlet are respectively provided on the lower base plate at the positions corresponding to both ends of the cold water trough. Multiple pairs of first connecting plates are fixed to the side of the lower base plate, and a bracket is installed at the bottom of each pair of first connecting plates. The bracket is fixed to the top of the base. By setting the cold water trough at the bottom of the upper base plate and the cooling water inlet and outlet on the lower base plate, the multi-layer extruder can form a cooling water channel to cool the base plate and prevent the base plate from being damaged by the high temperature of the heater. The separate design of the upper and lower base plates allows the user to directly clean the scale in the cold water trough.

Description

Technical Field

[0001] This utility model relates to the field of extruder technology, and specifically to a multi-layer extruder with a cooling structure. Background Technology

[0002] In the sheet production industry, multi-layer extruders are one of the key pieces of equipment, and their performance directly affects the quality of the sheets and production efficiency. During the operation of traditional multi-layer extruders, the heater continuously operates and generates extremely high temperatures. Under the continuous high temperature, the base used to support the heater is prone to accelerated aging or damage, which shortens the service life of the equipment and increases maintenance costs. Therefore, some existing multi-layer extruders usually have a cooling structure between the base and the heater to avoid the base being affected by the high temperature of the heater. The cooling structure on the base of existing extruders usually uses coils with circulating water for cooling. However, after long-term use, scale easily accumulates inside the coils. If not cleaned in time, it can easily block the circulating water path and affect the cooling effect. However, the integral structure of the coils is extremely difficult to clean, which greatly reduces the cleaning efficiency and affects the production schedule. Utility Model Content

[0003] The purpose of this invention is to address the shortcomings of existing technologies by providing a multi-layer extruder with a cooling structure, thereby solving the problems mentioned in the background art.

[0004] To achieve this objective, the present invention adopts the following technical solution:

[0005] A multilayer extruder with a cooling structure includes an upper base plate and a lower base plate. The upper base plate is installed at the bottom of a heater and has a serpentine cold water trough at its bottom. A slot is provided at the bottom of the upper base plate, and the lower base plate is inserted into the slot. The lower base plate and the upper base plate are fixed together by multiple evenly distributed bolts. A cold water inlet and a cold water outlet are respectively provided on the lower base plate at positions corresponding to both ends of the cold water trough. Multiple pairs of first connecting plates are fixed to the side of the lower base plate. A bracket is installed at the bottom of each pair of first connecting plates. The bracket is fixed to the top of a base. A drive structure is provided on the base. A barrel is provided inside the heater. A screw is rotatably installed inside the barrel, and the shaft of the screw is connected to the drive structure. The outlet of the barrel is connected to the multilayer co-extrusion film head.

[0006] As a preferred embodiment of a multi-layer extruder with a cooling structure, the support includes an upper U-shaped plate and a lower U-shaped plate. Second connecting plates are fixed to both ends of the upper U-shaped plate, and the second connecting plates are bolted to the bottom of the first connecting plate. Multiple equally spaced upper support plates are fixed to the top of the upper U-shaped plate, supporting the bottom of the lower base plate. Two symmetrically arranged threaded columns are fixed to the bottom of the upper U-shaped plate. The lower U-shaped plate is located directly below the upper U-shaped plate and fixed to the top of the base. Multiple equally spaced lower support plates are fixed to the bottom of the lower U-shaped plate, supporting the top of the base. Through holes are provided on the lower U-shaped plate corresponding to the positions of the two threaded columns, allowing them to pass through. Two nuts are provided on the threaded columns, located at the top and bottom of the lower U-shaped plate, respectively.

[0007] As a preferred embodiment of a multi-layer extruder with a cooling structure, the drive structure includes a gearbox and a motor mounted on top of the base. The shaft of the screw inside the barrel is connected to the output shaft of the gearbox via a coupling, and the output shaft of the motor is connected to the input shaft of the gearbox via a coupling.

[0008] As a preferred embodiment of a multi-layer extruder with a cooling structure, the heater is provided with a feed hopper at its top, and the outlet of the feed hopper is connected to the material cylinder.

[0009] As a preferred embodiment of a multi-layer extruder with a cooling structure, a chiller unit is provided next to the base. The outlet of the chiller unit is connected to the cold water inlet through a pipe, and the return port of the chiller unit is connected to the cold water outlet through a pipe.

[0010] As a preferred embodiment of a multi-layer extruder with a cooling structure, the top of the upper base plate is in close contact with the bottom of the heater, and four third connecting plates arranged in a rectangular array are fixed on both sides of the upper base plate. The third connecting plates are fixed to the outer shell of the heater by bolts.

[0011] As a preferred embodiment of a multi-layer extruder with a cooling structure, a layer of fluororubber pad is attached to the top of the lower base plate, and the fluororubber pad is in close contact with the bottom of the upper base plate.

[0012] Compared with the prior art, the present invention has the following beneficial effects:

[0013] This utility model features a multi-layer extruder with a cooling structure. By setting up an upper base plate, a lower base plate, and a bracket, it can serve as a support between the extruder's base and the heater. By setting up a cold water tank at the bottom of the upper base plate and a cooling water inlet and outlet on the lower base plate, a cooling water path can be formed to cool the base plate, preventing damage to the base plate due to the high temperature of the heater. The separate design of the upper and lower base plates allows users to easily clean the scale in the cold water tank, reducing the difficulty of cleaning scale in the cooling water path and improving cleaning efficiency. Attached Figure Description

[0014] To more clearly illustrate the technical solutions of the embodiments of this utility model, the drawings used in the embodiments of this utility model will be briefly described below. Obviously, the drawings described below are merely some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without any creative effort.

[0015] Figure 1 This is a schematic diagram of the overall structure of the multi-layer extruder with a cooling structure described in this utility model.

[0016] Figure 2 This is a schematic diagram of the cooling structure described in this utility model.

[0017] Figure 3 This is a structural schematic diagram of the bracket described in this utility model.

[0018] Explanation of reference numerals in the attached figures:

[0019] 1. Upper base plate; 2. Lower base plate; 3. Cold water tank; 4. Slot; 5. Cold water inlet; 6. Cold water outlet; 7. First connecting plate; 8. Bracket; 801. Upper U-shaped plate; 802. Lower U-shaped plate; 803. Second connecting plate; 804. Upper support plate; 805. Threaded column; 806. Lower support plate; 807. Nut; 9. Heater; 10. Base; 11. Cylinder; 12. Feed hopper; 13. Drive structure; 1301. Gearbox; 1302. Motor; 14. Multi-layer co-extrusion film head; 15. Chiller unit; 16. Third connecting plate. Detailed Implementation

[0020] The technical solution of this utility model will be further described below with reference to the accompanying drawings and specific embodiments.

[0021] The accompanying drawings are for illustrative purposes only and are schematic diagrams, not actual images. They should not be construed as limiting the scope of this patent. To better illustrate the embodiments of this utility model, some components in the drawings may be omitted, enlarged, or reduced, and do not represent the actual dimensions of the product. It is understandable to those skilled in the art that some well-known structures and their descriptions may be omitted in the drawings.

[0022] In the accompanying drawings of this utility model, the same or similar reference numerals correspond to the same or similar components. In the description of this utility model, it should be understood that if terms such as "upper," "lower," "left," "right," "inner," and "outer" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, they are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, the terms used to describe positional relationships in the drawings are only for illustrative purposes and should not be construed as limiting this patent. For those skilled in the art, the specific meaning of the above terms can be understood according to the specific circumstances.

[0023] In the description of this utility model, unless otherwise explicitly specified and limited, the term "connection" or similar designation indicating the connection relationship between components should be interpreted broadly. For example, it can refer to a fixed connection, a detachable connection, or an integral part; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium; it can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0024] like Figures 1 to 3 As shown, this utility model provides a multi-layer extruder with a cooling structure, which consists of an upper base plate 1 and a lower base plate 2. The upper base plate 1 is located at the bottom of a heater 9, with its top in close contact with the bottom of the heater 9. The upper base plate 1 is bolted to the heater 9 housing via four third connecting plates 16 arranged in a rectangular array on both sides. A serpentine cold water tank 3 is formed at the bottom of the upper base plate 1, and slots 4 are provided on both sides of the cold water tank 3. A layer of fluororubber pad is attached to the top of the lower base plate 2 and inserted into the slots 4. The lower base plate 2 is also fixed to the upper base plate 1 by multiple evenly distributed bolts. The fluororubber pad is in close contact with the bottom of the upper base plate 1. 2. Cold water inlet 5 and cold water outlet 6 are respectively set at both ends of the cold water tank 3. The upper base plate 1 and the lower base plate 2 cooperate to serve as the base plate supporting the heater 9. The cold water tank 3 of the upper base plate 1 and the cold water inlet 5 and cold water outlet 6 of the lower base plate 2 can form a cooling water channel. The fluororubber gasket can seal the gap between the upper base plate 1 and the lower base plate 2 to prevent water leakage in the cooling water channel. The circulating cooling water in the cooling water channel can cool the base plate and prevent the base plate from being burned by the high temperature heater 9. The split design of the base plate can facilitate the user to clean the scale in the cooling water channel when maintaining the equipment.

[0025] Multiple pairs of first connecting plates 7 are fixed to the side of the lower base plate 2. Each pair of first connecting plates 7 has a bracket 8 installed at its bottom. The bracket 8 consists of an upper U-shaped plate 801 and a lower U-shaped plate 802. The two ends of the upper U-shaped plate 801 are bolted to the first connecting plates 7 via second connecting plates 803. Multiple equally spaced upper support plates 804 are fixed to the top of the upper U-shaped plate 801. The upper support plates 804 support the bottom of the lower base plate 2. Two symmetrical threaded columns 805 are fixed to the bottom of the upper U-shaped plate 801. The lower U-shaped plate 802 is located directly below the upper U-shaped plate 801 and is fixed to the top of the base 10. The base plate 8 has multiple equally spaced lower support plates 806 fixed at its bottom, which support the top of the base 10. The lower U-shaped plate 802 has through holes corresponding to the positions of the threaded posts 805. The threaded posts 805 pass through the through holes and are fixed to the lower U-shaped plate 802 by two nuts 807. The bracket 8 serves as a connecting component between the base plate and the base 10. It can adjust the height of the base plate through the cooperation between the threaded posts 805 and the two nuts 807, thereby adapting to different models of heaters 9 and ensuring stable support for the heaters 9.

[0026] A drive structure 13, including a gearbox 1301 and a motor 1302, is mounted on the top of the base 10. The output shaft of the motor 1302 is connected to the input shaft of the gearbox 1301 via a coupling. A material cylinder 11 is located inside the heater 9, and a feed hopper 12 is located on the top. The outlet of the feed hopper 12 is connected to the material cylinder 11, and the outlet of the material cylinder 11 is connected to the multilayer co-extrusion film head 14. A screw is mounted inside the material cylinder 11, and the shaft of the screw is connected to the output shaft of the gearbox 1301 via a coupling. Sheet material can enter the material cylinder 11 through the feed hopper 12. The motor 1302 of the drive structure 13 drives the screw inside the barrel 11 to rotate, which can move the raw material inside the barrel 11 toward the outlet of the barrel 11. During this period, the heater 9 can heat and melt the raw material inside the barrel 11. The molten raw material can finally be extruded from the multi-layer co-extrusion film head 14. A chiller unit 15 is set next to the base 10. Its outlet is connected to the chilled water inlet 5 through a pipe, and its return port is connected to the chilled water outlet 6 through a pipe. The chiller unit 15 can provide circulating cooling water for the cooling water circuit in the base plate.

[0027] Working principle and usage process of this utility model:

[0028] Before the extruder starts working, the chiller unit 15 is started to circulate the cooling water in the cooling water channel between the upper base plate 1 and the lower base plate 2. When the extruder is working, the heater 9 and the motor 1302 are started to feed the sheet material into the barrel 11 from the feed hopper 12. The screw in the barrel 11 rotates under the drive of the motor 1302, pushing the material forward. During this period, the heater 9 heats and melts the material in the barrel 11. The molten material is finally extruded from the multilayer co-extrusion film die head 14. During the operation of the heater 9, the circulating cooling water is always cooling the base plate to prevent the base plate from being damaged by the high temperature outside the heater 9.

[0029] After the extruder is finished, when it is necessary to clean the scale in the cooling water circuit, wait for the external temperature of the heater 9 to drop to room temperature, turn off the chiller unit 15, disconnect the connecting pipe between the chiller unit 15 and the cold water inlet 5 and the cold water outlet 6, then remove the bolts between the third connecting plate 16 and the heater 9 housing, then loosen the nut 807 on the bracket 8 to separate the base plate from the heater 9, then remove the bolts between the first connecting plate 7 and the second connecting plate 803, and the base plate can be removed. After the base plate is removed, it can be temporarily supported at the bottom of the heater 9 with other items. After removing the bolts between the upper base plate 1 and the lower base plate 2, pull the lower base plate 2 out of the slot 4 to expose the cold water tank 3 at the bottom of the upper base plate 1, so that the user can clean the scale in the cold water tank 3. After the scale is cleaned, the steps are reversed to complete the installation of the base plate.

[0030] It should be stated that the above-described specific embodiments are merely preferred embodiments of this utility model and the technical principles employed. Those skilled in the art should understand that various modifications, equivalent substitutions, and variations can be made to this utility model. However, such variations, as long as they do not depart from the spirit of this utility model, should be within the protection scope of this utility model. Furthermore, some terminology used in this application specification and claims is not limiting, but merely for ease of description.

Claims

1. A multi-layer extruder with a cooling structure, characterized in that, The cooling structure includes an upper base plate (1) and a lower base plate (2). The upper base plate (1) is installed at the bottom of the heater (9). A serpentine cold water trough (3) is opened at the bottom of the upper base plate (1). A slot (4) is provided at the bottom of the upper base plate (1). The lower base plate (2) is inserted into the slot (4). The lower base plate (2) and the upper base plate (1) are fixed together by multiple evenly distributed bolts. A cold water inlet (5) and a cold water outlet are respectively provided on the lower base plate (2) at the positions corresponding to both ends of the cold water trough (3). The bottom plate (2) has multiple pairs of first connecting plates (7) fixed on its side. Each pair of first connecting plates (7) has a bracket (8) installed at its bottom. The bracket (8) is fixed on the top of the base (10). The base (10) has a drive structure (13). The heater (9) has a material cylinder (11) inside. A screw is rotatably installed inside the material cylinder (11), and the shaft of the screw is connected to the drive structure (13). The outlet of the material cylinder (11) is connected to the multilayer co-extrusion film head (14).

2. The multi-layer extruder with a cooling structure according to claim 1, characterized in that, The bracket (8) includes an upper U-shaped plate (801) and a lower U-shaped plate (802). Second connecting plates (803) are fixed to both ends of the upper U-shaped plate (801). The second connecting plates (803) are bolted to the bottom of the first connecting plate (7). Multiple equally spaced upper support plates (804) are fixed to the top of the upper U-shaped plate (801). The upper support plates (804) support the bottom of the lower base plate (2). Two symmetrically arranged threaded columns (805) are fixed to the bottom of the upper U-shaped plate (801). The lower U-shaped plate (802)... 802) is located directly below the upper U-shaped plate (801) and fixed to the top of the base (10). The bottom of the lower U-shaped plate (802) is fixed with multiple equally spaced lower support plates (806). The lower support plates (806) are supported on the top of the base (10). The lower U-shaped plate (802) has through holes for the two threaded columns (805) to pass through. The threaded columns (805) are provided with two nuts (807). The two nuts (807) are located at the top and bottom of the lower U-shaped plate (802) respectively.

3. The multi-layer extruder with a cooling structure according to claim 1, characterized in that, The drive structure (13) includes a gearbox (1301) and a motor (1302) mounted on the top of the base (10). The shaft of the screw inside the barrel (11) is connected to the output shaft of the gearbox (1301) via a coupling. The output shaft of the motor (1302) is connected to the input shaft of the gearbox (1301) via a coupling.

4. The multi-layer extruder with a cooling structure according to claim 1, characterized in that, The heater (9) is provided with a feed hopper (12) at the top, and the outlet of the feed hopper (12) is connected to the material cylinder (11).

5. The multi-layer extruder with a cooling structure according to claim 1, characterized in that, A chiller unit (15) is provided next to the base (10). The outlet of the chiller unit (15) is connected to the cold water inlet (5) through a pipe, and the return port of the chiller unit (15) is connected to the cold water outlet (6) through a pipe.

6. The multi-layer extruder with a cooling structure according to claim 1, characterized in that, The top of the upper base plate (1) is in close contact with the bottom of the heater (9). Four third connecting plates (16) arranged in a rectangular array are fixed on both sides of the upper base plate (1). The third connecting plates (16) are fixed to the outer shell of the heater (9) by bolts.

7. The multi-layer extruder with a cooling structure according to claim 1, characterized in that, A layer of fluororubber pad is attached to the top of the lower base plate (2), and the fluororubber pad is in close contact with the bottom of the upper base plate (1).

Images