Multi-layer co-extrusion device for composite casing film

Abstract

The utility model discloses a multi-layer co-extrusion device for a composite casing membrane, which relates to the technical field of composite casing membrane production equipment and comprises a central column, a composite extrusion component is arranged on the outer wall of the central column, a heating component sleeved on the central column is arranged at the bottom of the composite extrusion component, and the heating component is arranged on the central column. A pressing assembly is arranged outside the central column and located below the heating assembly. The composite extrusion assembly comprises a plurality of extrusion pipes connected to the outer wall of the central column in a sleeving mode. According to the multi-layer co-extrusion device for the composite casing film, raw materials of different layers flow into different extrusion channels, in the channels, the raw materials of all the layers begin to be fused to form a multi-layer structure, and in the process, the raw materials of the different layers are kept in a relatively independent and gradually fused state in the extrusion process; and the raw materials of each layer are more uniformly distributed in the flowing process, so that the thicknesses of the layers of the composite casing film are relatively consistent.

Description

Technical Field

[0001] This utility model relates to the technical field of composite sausage casing production equipment, specifically a multi-layer co-extrusion device for composite sausage casing. Background Technology

[0002] In the food packaging industry, sausage casings are a crucial material for wrapping meat, sausages, and other foods, and their performance directly affects the shelf life, safety, and appearance of the food. Traditional sausage casings are often made from a single material, resulting in problems such as poor barrier properties, insufficient strength, and inadequate toughness. To improve the performance of sausage casings, composite casings have been developed, combining materials with different properties to achieve better barrier properties, strength, toughness, and other performance characteristics.

[0003] Existing multilayer co-extrusion equipment produces composite sausage casing films with uneven extrusion of materials in each layer, resulting in inconsistent thickness of each layer and affecting the overall performance of the composite sausage casing film. Therefore, this utility model provides a multilayer co-extrusion device for composite sausage casing films. Utility Model Content

[0004] To address the shortcomings of existing technologies, this invention provides a multi-layer co-extrusion device for composite sausage casing films, which solves the problem that uneven extrusion of materials in each layer during the production of composite sausage casing films by existing multi-layer co-extrusion devices leads to inconsistent thicknesses of each layer of the composite sausage casing film, affecting its overall performance.

[0005] To achieve the above objectives, this utility model provides the following technical solution: a multilayer co-extrusion device for composite sausage casing film, comprising a central column, a composite extrusion assembly on the outer wall of the central column, a heating assembly sleeved on the bottom of the composite extrusion assembly, and a pressing assembly located below the heating assembly on the outside of the central column; the composite extrusion assembly includes multiple extrusion tubes sleeved on the outer wall of the central column, which are interconnected, with the diameter of each extrusion tube increasing equidistantly in a stepped manner, and the height of each extrusion tube also being stepped. The diameter of each extrusion tube decreases from high to low. Each extrusion tube has an extrusion channel between its end and the central column. The diameter of each extrusion channel increases equidistantly from the inside to the outside in a stepped manner. Each extrusion tube has an extrusion channel on its inner side. Each extrusion tube has a feed pipe connected to the extrusion channel on its outer wall. The heating assembly includes a cylindrical shell fixedly connected to the bottom surface of the extrusion tube. A heating cavity is provided on the cylindrical shell. An electric heating tube is provided inside the heating cavity. A fusion channel is provided between the inner wall of the cylindrical shell and the outer wall of the central column. The fusion channel is connected to the extrusion channel.

[0006] Preferably, two fixing brackets are installed at the bottom of the cylindrical shell. The fixing brackets are arranged along the length of the central column, and a heat dissipation fan is installed between the outer surfaces of the two fixing brackets. The heat dissipation fan is located below the pressing assembly.

[0007] Preferably, the pressing assembly includes two pressing rollers rotatably disposed between the opposite side surfaces of the two fixed frames, and the two pressing rollers form a circular channel surrounding the periphery of the central column.

[0008] Preferably, one of the fixing frames has two meshing first gears installed on its outer wall, and the two first gears are respectively connected to two pressing rollers via a rotating shaft. The other fixing frame has a motor installed on its outer wall, and the motor is connected to one of the pressing rollers via a rotating shaft.

[0009] Preferably, two feeding rollers are rotatably provided between the opposite outer surfaces of the two fixed frames. The feeding rollers are located below the cooling fan, and the two feeding rollers form a circular channel surrounding the central column. Two meshing second gears are installed on the outer surface of one of the fixed frames, and the two second gears are connected to the two feeding rollers respectively through a rotating shaft.

[0010] Preferably, two synchronous pulleys are mounted on the outer surface of another fixed frame. One synchronous pulley is connected to one of the pressing rollers via a rotating shaft, and the other synchronous pulley is connected to one of the feeding rollers via a rotating shaft. A synchronous belt is provided between the two synchronous pulleys.

[0011] Beneficial effects

[0012] This invention provides a multilayer co-extrusion device for composite sausage casing films. Compared with the prior art, it has the following advantages:

[0013] 1. This multilayer co-extrusion device for composite sausage casing film connects the feed pipe to the extruder, and then transports different sausage casing film raw materials through their respective feed pipes to the extrusion channels in the corresponding extrusion pipes. This allows the raw materials of different layers to flow into the fusion channel from different extrusion channels. Then, the electric heating tube in the heating chamber starts to heat, providing the required heat to the raw materials in the fusion channel. In the fusion channel, since the raw materials of different layers flow in from different extrusion channels, the raw materials of each layer begin to fuse in the channel, forming a multilayer structure. During this process, since the raw materials of different layers maintain a relatively independent yet gradually fused state during the extrusion process, it ensures that the raw materials of each layer are more evenly distributed during the flow process, thereby ensuring that the thickness of each layer of the composite sausage casing film is relatively consistent.

[0014] 2. The multilayer co-extrusion device for composite sausage casing film, by starting the motor, drives the pressing rollers to rotate in conjunction with two first gears. The two pressing rollers form a circular channel around the central column. In this channel, the multilayer composite sausage casing film material flowing out from the fusion channel is pressed, so that it is further bonded tightly, thereby improving the integrity and stability of the composite sausage casing film. Attached Figure Description

[0015] Figure 1 This is a three-dimensional appearance schematic diagram of the present utility model;

[0016] Figure 2 This is a cross-sectional view of the composite extrusion assembly of this utility model;

[0017] Figure 3 For practical purposes Figure 2 Enlarged view of point A in the image;

[0018] Figure 4 For practical purposes Figure 2 Enlarged view of point B in the image;

[0019] Figure 5 This is a three-dimensional appearance diagram of the pressing component of this utility model;

[0020] Figure 6 This is a schematic diagram of the pressing component of this utility model from another perspective.

[0021] In the diagram: 1. Central column; 2. Composite extrusion assembly; 21. Extrusion tube; 22. Extrusion channel; 23. Feed tube; 24. Extrusion channel; 3. Heating assembly; 31. Cylindrical shell; 32. Fusion channel; 33. Heating chamber; 34. Heating tube; 4. Pressing assembly; 41. Pressing roller; 42. First gear; 43. Motor; 5. Cooling fan; 6. Feeding roller; 61. Second gear; 7. Synchronous pulley; 71. Synchronous belt; 8. Fixing frame. Detailed Implementation

[0022] 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.

[0023] This utility model provides two technical solutions:

[0024] Figures 1-6The first embodiment is shown: a multilayer co-extrusion apparatus for composite sausage casing film, including a central column 1, a composite extrusion assembly 2 provided on the outer wall of the central column 1, a heating assembly 3 sleeved on the bottom of the composite extrusion assembly 2, and a pressing assembly 4 provided outside the central column 1 below the heating assembly 3; the composite extrusion assembly 2 includes multiple extrusion tubes 21 sleeved on the outer wall of the central column 1, which are interconnected, the diameter of each extrusion tube 21 increases equidistantly from small to large in a stepped manner, and the height of each extrusion tube 21 decreases stepwise from high to low. An extrusion channel 24 is provided between the end of the tube and the central column 1, and the diameter of each extrusion channel 24 increases equidistantly from the inside to the outside in a stepped manner from top to bottom. Each extrusion tube 21 has an extrusion channel 22 on its inner side, and each extrusion tube 21 has a feed pipe 23 on its outer wall that communicates with the extrusion channel 22. The heating assembly 3 includes a cylindrical shell 31 that is fixedly connected to the bottom surface of the extrusion tube 21. A heating cavity 33 is provided on the cylindrical shell 31, and an electric heating tube 34 is provided inside the heating cavity 33. A fusion channel 32 is provided between the inner wall of the cylindrical shell 31 and the outer wall of the central column 1, and the fusion channel 32 communicates with the extrusion channel 24.

[0025] Specifically, after connecting the feed pipe 23 to the extruder, different sausage casing film raw materials are transported through their respective feed pipes 23 to the extrusion channels 22 in the corresponding extrusion pipes 21, so that the raw materials of different layers flow from different extrusion channels 24 into the fusion channel 32. Then, the electric heating tube 34 in the heating chamber 33 starts to heat, providing the required heat to the raw materials in the fusion channel 32. In the fusion channel 32, since the raw materials of different layers flow from different extrusion channels 24, the raw materials of each layer begin to fuse in the channel, forming a multi-layer structure. In this process, since the raw materials of different layers maintain a relatively independent yet gradually fused state during the extrusion process, it ensures that the raw materials of each layer are more evenly distributed during the flow process, thereby ensuring that the thickness of each layer of the composite sausage casing film is relatively consistent.

[0026] Figures 1-6 The second embodiment is shown. The main difference from the first embodiment is that two fixing brackets 8 are installed at the bottom of the cylindrical housing 31. The fixing brackets 8 are arranged along the length of the central column 1. A heat dissipation fan 5 is installed between the outer surfaces of the two fixing brackets 8. The heat dissipation fan 5 is located below the pressing assembly 4.

[0027] Specifically, the composite sausage casing membrane can be cooled by starting the cooling fan 5.

[0028] In this embodiment, the pressing assembly 4 includes two pressing rollers 41 rotatably disposed between the opposite surfaces of the two fixed frames 8. The two pressing rollers 41 form a circular channel surrounding the periphery of the central column 1. Two meshing first gears 42 are installed on the outer wall of one of the fixed frames 8. The two first gears 42 are connected to the two pressing rollers 41 respectively through a rotating shaft. A motor 43 is installed on the outer wall of the other fixed frame 8, and the motor 43 is connected to one of the pressing rollers 41 through a rotating shaft.

[0029] Specifically, by starting the motor 43, the two first gears 42 drive the pressing rollers 41 to rotate. The two pressing rollers 41 form a circular channel around the central column 1. In this channel, the multi-layer composite sausage casing material flowing out from the fusion channel 32 is pressed to further bond it tightly, thereby improving the integrity and stability of the composite sausage casing.

[0030] In this embodiment, two feeding rollers 6 are rotatably arranged between the opposite outer surfaces of the two fixed frames 8. The feeding rollers 6 are located below the cooling fan 5, and the two feeding rollers 6 form a circular channel surrounding the central column 1. Two meshing second gears 61 are installed on the outer surface of one of the fixed frames 8. The two second gears 61 are connected to the two feeding rollers 6 respectively through a rotating shaft. Two synchronous pulleys 7 are installed on the outer surface of the other fixed frame 8. One synchronous pulley 7 is connected to one of the pressing rollers 41 through a rotating shaft, and the other synchronous pulley 7 is connected to one of the feeding rollers 6 through a rotating shaft. A synchronous belt 71 is provided between the two synchronous pulleys 7.

[0031] Specifically, under the synergistic action of the synchronous pulley 7 and the synchronous belt 71, the rotation of the pressing roller 41 is transmitted to the feeding roller 6. The two second gears 61 mesh with each other, driving the feeding roller 6 to rotate. The two feeding rollers 6 form a circular channel around the central column 1, which further pulls and stably transports the pressed composite casing film.

[0032] Furthermore, any content not described in detail in this specification is existing technology known to those skilled in the art.

[0033] Working principle: First, after connecting the feed pipe 23 to the extruder, different sausage casing film raw materials are transported through their respective feed pipes 23 to the extrusion channels 22 in the corresponding extrusion pipes 21, so that the raw materials of different layers flow from different extrusion channels 24 into the fusion channel 32. Then, the electric heating tube 34 in the heating chamber 33 starts to heat, providing the required heat to the raw materials in the fusion channel 32. In the fusion channel 32, since the raw materials of different layers flow from different extrusion channels 24, the raw materials of each layer begin to fuse in the channel, forming a multi-layer structure. In this process, since the raw materials of different layers maintain a relatively independent yet gradually fused state during the extrusion process, it ensures that the raw materials of each layer are more evenly distributed during the flow process, thereby ensuring that the thickness of each layer of the composite sausage casing film is relatively consistent.

[0034] Then, the fused composite casing material flows downward from the fusion channel 32 to the pressing assembly 4. The motor 43 is started, and the two first gears 42 drive the pressing rollers 41 to rotate. The two pressing rollers 41 form a circular channel around the central column 1. In this channel, the multi-layer composite casing material flowing out from the fusion channel 32 is pressed, making it more tightly bonded and improving the integrity and stability of the composite casing.

[0035] Afterwards, as the composite sausage casing passes the cooling fan 5, the cooling fan 5 is activated to cool the composite sausage casing.

[0036] Finally, under the synergistic action of the synchronous pulley 7 and the synchronous belt 71, the rotation of the pressing roller 41 is transmitted to the feeding roller 6. The two second gears 61 mesh with each other, driving the feeding roller 6 to rotate. The two feeding rollers 6 form a circular channel around the central column 1, which further pulls and stably transports the pressed composite casing film.

[0037] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, method, article, or apparatus.

[0038] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A multilayer coextrusion device for composite casing films comprising a central column (1), characterized in that: The outer wall of the center column (1) is provided with a composite extrusion assembly (2), the bottom of the composite extrusion assembly (2) is provided with a heating assembly (3) sleeved on the center column (1), and the outer portion of the center column (1) below the heating assembly (3) is provided with a pressing assembly (4). The composite extrusion assembly (2) comprises a plurality of extrusion pipes (21) sleeved on the outer wall of the center column (1), the diameters of the extrusion pipes (21) are increased by equal intervals in a stepped manner from small to large, the heights of the extrusion pipes (21) are decreased by equal intervals in a stepped manner from high to low, an extrusion channel (24) is arranged between the end of each extrusion pipe (21) and the center column (1), the diameters of the extrusion channels (24) are increased by equal intervals in a stepped manner from inside to outside from top to bottom, and the inner sides of the extrusion pipes (21) are provided with extrusion channels (22), and the outer walls of each extrusion pipe (21) are provided with feeding pipes (23) in communication with the extrusion channels (22). The heating assembly (3) comprises a cylindrical shell (31) fixedly connected with the bottom surface of the extrusion pipe (21), a heating cavity (33) is arranged on the cylindrical shell (31), an electric heating pipe (34) is arranged in the heating cavity (33), and a fusion channel (32) is arranged between the inner wall of the cylindrical shell (31) and the outer wall of the center column (1), and the fusion channel (32) is in communication with the extrusion channel (24).

2. A multi-layer co-extrusion device for a composite casing film according to claim 1, characterized in that: Two fixed frames (8) are mounted at the bottom end of the cylindrical shell (31), the fixed frames (8) are arranged along the length direction of the center column (1), a heat dissipation fan (5) is mounted between the outer surfaces of the two fixed frames (8), and the heat dissipation fan (5) is arranged below the pressing assembly (4).

3. A multi-layer co-extrusion device for a composite casing film according to claim 2, characterized in that: The pressing assembly (4) comprises two pressing rollers (41) rotatably arranged between the opposite side surfaces of the two fixed frames (8), and a circular channel surrounding the periphery of the center column (1) is formed between the two pressing rollers (41).

4. A multi-layer co-extrusion device for a composite casing film according to claim 3, characterized in that: One of the fixed frames (8) is provided with two first gears (42) meshing with each other, the two first gears (42) are connected with the two pressing rollers (41) through shafts, respectively, and the other fixed frame (8) is provided with a motor (43), and the motor (43) is connected with one of the pressing rollers (41) through a shaft.

5. A multi-layer co-extrusion device for a composite casing film according to claim 3, characterized in that: Two discharge rollers (6) are rotatably arranged between the opposite side outer surfaces of the two fixed frames (8), the discharge rollers (6) are arranged below the heat dissipation fan (5), and a circular channel surrounding the periphery of the center column (1) is formed between the two discharge rollers (6), and the outer surface of one of the fixed frames (8) is provided with two second gears (61) meshing with each other, and the two second gears (61) are connected with the two discharge rollers (6) through shafts, respectively.

6. A multi-layer co-extrusion device for a composite casing film according to claim 5, characterized in that: The outer surface of the other fixed frame (8) is provided with two synchronous wheels (7), one of the synchronous wheels (7) is connected with one of the pressing rollers (41) through a shaft, the other synchronous wheel (7) is connected with one of the discharge rollers (6) through a shaft, and a synchronous belt (71) is arranged between the two synchronous wheels (7).

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