Heating mechanism for a multilayer coextrusion sheet machine

Abstract

The utility model discloses a heating mechanism of multilayer co -extrusion sheet machine, including support frame, temperature -rising mechanism and circulation mechanism, support frame: its upper end fixedly connected with triangle shell, and the left and right ends of triangle shell all are provided with the cover, and the extrusion pipeline is set up between two covers, and the lower surface of triangle shell and the two sides slope all are set up with the mounting groove of even distribution, temperature -rising mechanism: it includes bottom plate, support rod, heating wire and arc cover, the inboard of bottom plate all are fixedly connected with arc cover, and the inner wall between the two sides of arc cover all are fixedly connected with the support rod of even distribution, and the outside of support rod all movably sheathed with heating wire, and the whole of bottom plate and arc cover is set up in the inside of mounting groove respectively, and the input of heating wire all is electrically connected with the output of external controller, this heating mechanism of multilayer co -extrusion sheet machine, convenient maintenance replacement heating mechanism, make heating more even through the air circulation in triangle shell simultaneously.

Description

Technical Field

[0001] This utility model relates to the technical field of multi-layer co-extrusion sheet machines, specifically to the heating mechanism of a multi-layer co-extrusion sheet machine. Background Technology

[0002] Multilayer co-extrusion sheet forming machines are key equipment for producing high-performance composite plastic sheets. Their core technology lies in using precision co-extrusion to layer polymer melts with different properties within a die, forming a multilayer sheet structure in a single operation. This equipment typically employs a horizontal or inclined three-roller pressing structure. This design optimizes the sheet forming path, resulting in a more rational production process, improved product thickness uniformity and surface finish, and significantly enhanced ease of operation and maintenance.

[0003] Authorization announcement number CN219006955U discloses a heating device for a multi-layer co-extrusion sheet machine, comprising: an extrusion cylinder with a motor at one end and an extrusion screw at the output end of the motor; a heat insulation sleeve fitted onto the extrusion cylinder, with ventilation openings on the heat insulation sleeve; and a heating mechanism arranged linearly on the heat insulation sleeve. The heating mechanism includes a fixed frame and a sliding frame. The fixed frame is fixed to the heat insulation sleeve, and the sliding frame slides within the fixed frame. A heating coil is mounted on the sliding frame. A fan is fixed to the bottom of the fixed frame, with its air outlet facing the heating coil. The heating device for the multi-layer co-extrusion sheet machine provided by this utility model has a simple structure and is easy to operate. By utilizing the heating mechanism, after the heating coil has been used for a long time, the sliding frame can be slid out from the fixed frame, thereby quickly maintaining or replacing the heating coil. However, when only the middle sliding frame is replaced, the sliding frames at both ends need to be removed before the middle sliding frame can be taken out. The middle sliding frame is subject to severe interference when it is removed, making replacement inconvenient. At the same time, the fan does not describe the air outlet method, and the fan continuously supplies external air. The temperature difference between the external air and the air inside the fixed frame is large, making it difficult to maintain a stable heating temperature. Therefore, we propose a heating mechanism for the multi-layer co-extrusion sheet machine. Utility Model Content

[0004] The technical problem to be solved by this utility model is to overcome the existing defects and provide a heating mechanism for a multi-layer co-extrusion sheet machine, which is convenient for maintenance and replacement of the heating mechanism. At the same time, the heating is more uniform through the internal air circulation of the triangular shell, which can effectively solve the problems in the background art.

[0005] To achieve the above objectives, this utility model provides the following technical solution: a heating mechanism for a multi-layer co-extrusion sheet machine, comprising a support frame, a heating mechanism, and a circulation mechanism; Support frame: A triangular shell is fixedly connected to its upper end. Both ends of the triangular shell are equipped with caps. An extrusion pipe is provided between the two caps. The lower surface and the front and rear inclined surfaces of the triangular shell are provided with evenly distributed mounting grooves. Heating mechanism: It includes a base plate, support rods, heating wires and arc-shaped cover. The arc-shaped cover is fixedly connected to the inner side of the base plate. The support rods are fixedly connected between the inner walls of the front and rear sides of the arc-shaped cover and are evenly distributed. The heating wires are movably sleeved on the outside of the support rods. The base plate and the arc-shaped cover are respectively set inside the mounting groove. The input end of the heating wire is electrically connected to the output end of the external controller. The circulation mechanism includes circulation pipes and connecting pipes. The circulation pipes are symmetrically fixed to the upper surface of the support frame, and the two circulation pipes are connected by the connecting pipes, which facilitates the maintenance and replacement of the heating mechanism. At the same time, the heating is more uniform through the air circulation inside the triangular shell.

[0006] Furthermore, the heating mechanism also includes rubber rings, which are fixedly connected to the inner side of the base plate. The inner side of each rubber ring is in contact with the outer side of the support frame to achieve a seal in the mounting groove.

[0007] Furthermore, the lower surface and the front and rear inclined surfaces of the triangular shell are fixedly connected with evenly distributed fixing bolts. Each vertically adjacent fixing bolt on the front and rear inclined surfaces of the triangular shell is connected to a pressure plate by a nut. The bottom plates on the front and rear sides are respectively snapped between the front and rear inclined surfaces of the triangular shell and the two adjacent pressure plates. Each adjacent fixing bolt on the lower surface of the triangular shell is connected to a pressure plate by a nut. The bottom plate on the lower side is respectively snapped between the lower surface of the triangular shell and the two adjacent pressure plates, thereby fixing the bottom plate.

[0008] Furthermore, the front and rear inclined surfaces of the triangular shell are provided with evenly distributed limiting strips, and the bottom plates on the front and rear sides are respectively located between two vertically adjacent limiting strips to position the bottom plates on the front and rear sides during installation.

[0009] Furthermore, the lower surfaces of the support rods at the upper end of the support frame are rotatably connected to limit plates via pins, and the bottom plate at the lower end is respectively snapped between the lower surface of the triangular shell and two adjacent limit plates to prevent it from falling off when the bottom plate is installed.

[0010] Furthermore, the circulation mechanism also includes a blade holder, a motor holder, and a motor. The motor holder is bolted to the upper end of the circulation pipe. The upper surface of the motor holder is fixedly connected to a motor. The lower end of the output shaft of the motor is fixedly connected to a blade holder. The outer arc surface of the blade holder is provided with uniformly distributed blades. The input end of the motor is electrically connected to the output end of an external controller to drive air circulation.

[0011] Furthermore, the left and right ends of the triangular shell are provided with evenly distributed fixing seats. The two fixing seats at the top and the two fixing seats on the front and back sides are connected by bolts to pressure plates three. The cover is located between the pressure plates three on the left and right sides respectively, and the cover is fixed.

[0012] Compared with the prior art, the beneficial effects of this utility model are as follows: The heating mechanism of this multi-layer co-extrusion sheet machine has the following advantages: 1. The base plate and the arc-shaped cover are fixed together by pressure plate one and pressure plate two respectively. When disassembling, simply remove the corresponding pressure plate one and pressure plate two. Each base plate and arc-shaped cover does not interfere with each other, making disassembly easy.

[0013] 2. The heating wire heats the inside of the triangular shell. Two motors drive the blade seats to rotate in opposite directions, so that the air inside the triangular shell circulates within the whole consisting of the triangular shell, the circulation pipe and the connecting pipe, achieving uniform heating. Attached Figure Description

[0014] Figure 1 This is a schematic diagram of the structure of this utility model; Figure 2 This is a cross-sectional structural diagram of the present invention; Figure 3 This is an enlarged structural diagram of point A in this utility model; Figure 4 This is a schematic diagram of the heating mechanism of this utility model; Figure 5 This is a partial structural schematic diagram of the support frame of this utility model viewed from below.

[0015] In the diagram: 1 Support frame, 2 Triangular shell, 3 Heating mechanism, 31 Base plate, 32 Support rod, 33 Heating wire, 34 Arc-shaped cover, 35 Rubber ring, 4 Circulation mechanism, 41 Circulation pipe, 42 Blade seat, 43 Motor seat, 44 Motor, 45 Connecting pipe, 5 Fixing bolt, 6 Pressure plate one, 7 Limiting strip, 8 Pressure plate two, 9 Limiting plate, 10 Cover, 11 Fixing seat, 12 Pressure plate three, 13 Extrusion pipe. Detailed Implementation

[0016] 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.

[0017] Please see Figure 1-5This embodiment provides a technical solution: a heating mechanism for a multi-layer co-extrusion sheet machine, including a support frame 1, a heating mechanism 3, and a circulation mechanism 4; Support frame 1: A triangular shell 2 is fixedly connected to its upper end. Both ends of the triangular shell 2 are provided with caps 10. An extrusion pipe 13 is provided between the two caps 10. The lower surface and the front and rear inclined surfaces of the triangular shell 2 are provided with evenly distributed mounting grooves. Both ends of the triangular shell 2 are provided with evenly distributed fixing seats 11. The two fixing seats 11 at the upper end and the two fixing seats 11 on the same side at the front and rear are connected by bolts with pressure plates 12. The caps 10 are located between the pressure plates 12 on the same side on the left and right. Heating mechanism 3 includes a base plate 31, support rods 32, heating wires 33, and an arc-shaped cover 34. The arc-shaped cover 34 is fixedly connected to the inner side of the base plate 31. Evenly distributed support rods 32 are fixedly connected between the inner walls of the front and rear sides of the arc-shaped cover 34. Heating wires 33 are movably sleeved on the outside of each support rod 32. The base plate 31 and the arc-shaped cover 34 are integrally disposed within mounting grooves. The input end of the heating wire 33 is electrically connected to the output end of an external controller. The heating mechanism 3 also includes rubber rings 35, which are fixedly connected to the base plate. The inner side of 31 and the inner side of rubber ring 35 are both in contact with the outer side of support frame 1. The lower surface and the front and rear inclined surfaces of triangular shell 2 are fixedly connected with evenly distributed fixing bolts 5. The two vertically adjacent fixing bolts 5 on the front and rear inclined surfaces of triangular shell 2 are connected to pressure plates 6 through nuts 1. The bottom plates 31 on the front and rear sides are respectively snapped between the front and rear inclined surfaces of triangular shell 2 and the two adjacent pressure plates 6. The two adjacent fixing bolts 5 on the lower surface of triangular shell 2 are connected to pressure plates 2 through nuts 2. The bottom plates 31 on the lower side are respectively snapped between the front and rear inclined surfaces of triangular shell 2 and the two adjacent pressure plates 6. The triangular shell 2 is connected to the lower surface of the triangular shell 2 and the two adjacent pressure plates 8. The front and rear inclined surfaces of the triangular shell 2 are provided with evenly distributed limiting strips 7. The bottom plates 31 on the front and rear sides are respectively located between two vertically adjacent limiting strips 7. The lower surface of the support rod at the upper end of the support frame 1 is rotatably connected to a limiting plate 9 via a pin. The bottom plates 31 at the lower end are respectively snapped between the lower surface of the triangular shell 2 and the two adjacent limiting plates 9. When installing the bottom plates 31 on the front and rear sides, the bottom plates 31 are respectively inserted into the installation groove, with the bottom plates 31 located between two vertically adjacent limiting strips 7. Position the base plate 31 between the two parts, then install the pressure plate 6, which presses the base plate 31 to complete the installation. When installing the lower base plate 31, insert the base plate 31 into the installation groove, rotate the limiting plate 9 to make the base plate 31 lock between two adjacent limiting plates 9 to prevent the base plate 31 from falling off, and then install the pressure plate 6 to complete the installation. The rubber ring 35 is a PEEK rubber ring to achieve the sealing of the installation groove. During operation, the controller of the external multi-layer co-extrusion sheet machine powers the heating wire 33, which heats the extrusion pipe 13. The circulation mechanism 4 includes a circulation pipe 41 and a connecting pipe 45. The circulation pipes 41 are symmetrically fixed to the upper surface of the support frame 1. The two circulation pipes 41 are connected to each other through the connecting pipe 45. The circulation mechanism 4 also includes a blade seat 42, a motor seat 43, and a motor 44. The motor seat 43 is bolted to the upper end of the circulation pipe 41. The upper surface of the motor seat 43 is fixedly connected to the motor 44. The lower end of the output shaft of the motor 44 is fixedly connected to the blade seat 42. The outer arc surface of the blade seat 42 is provided with uniformly distributed blades. The input end of the motor 44 is electrically connected to the output end of an external controller. When the two motors 44 are started, the output shafts of the two motors 44 rotate in opposite directions, driving the adjacent blade seats 42 to rotate in opposite directions. The air circulates inside the whole composed of the triangular shell 2, the circulation pipe 41, and the connecting pipe 45, driven by the blades of the blade seat 42, so that the extrusion pipe 13 is heated evenly.

[0018] The working principle of the heating mechanism of the multi-layer co-extrusion sheet machine provided by this utility model is as follows: The cover 10 and the triangular shell 2 are respectively fitted onto the outside of the extrusion pipe 13 of the co-extrusion sheet machine. The support frame 1 is installed at the lower end of the triangular shell 2 and fixedly connected to the lower surface of the triangular shell 2. The cover 10 is fixed by the pressure plate 12. When installing the bottom plates 31 on the front and rear sides, the bottom plates 31 are inserted into the installation grooves respectively. The bottom plates 31 are positioned between two vertically adjacent limiting strips 7. Then, the pressure plate 6 is installed, pressing the bottom plates 31 tightly, completing the installation. When installing the lower bottom plate 31, the bottom plates 31 are inserted into the installation grooves respectively. The limiting plate 9 is rotated to make the bottom plate 31 lock between two adjacent limiting plates 9, preventing the bottom plate 31 from falling off. Then, the bottom plates 31 are installed... After the pressure plate 6 is installed, the rubber ring 35 is a PEEK rubber ring (the continuous operating temperature of a PEEK rubber ring is 260℃, and the highest heating temperature of the multi-layer co-extrusion sheet machine generally does not exceed 200℃), which achieves the sealing of the installation groove. During operation, the external controller of the multi-layer co-extrusion sheet machine powers on the heating wire 33, which heats the extrusion pipe 13. At the same time, the two motors 44 start, and the output shafts of the two motors 44 rotate in opposite directions, driving the adjacent blade seats 42 to rotate in opposite directions. Air circulates in the whole composed of the triangular shell 2, the circulation pipe 41, and the connecting pipe 45, driven by the blades of the blade seat 42, so that the extrusion pipe 13 is heated evenly. During maintenance, the pressure plate 6 or the pressure plate 8 can be removed in sequence, and the corresponding base plate 31 can be removed.

[0019] It is worth noting that the motor 44 and heating wire 33 disclosed in the above embodiments can be freely configured according to the actual application scenario, and the external controller controls the operation of the motor 44 and heating wire 33 using methods commonly used in the prior art.

[0020] The above description is merely an embodiment of this utility model and does not limit the patent scope of this utility model. Any equivalent structural or procedural transformations made based on the content of this utility model specification and drawings, or direct or indirect applications in other related technical fields, are similarly included within the patent protection scope of this utility model.

Claims

1. A heating mechanism for a multi-layer co-extrusion sheet machine, characterized in that: It includes a support frame (1), a heating mechanism (3), and a circulation mechanism (4); Support frame (1): A triangular shell (2) is fixedly connected to its upper end. Both ends of the triangular shell (2) are provided with caps (10). An extrusion pipe (13) is provided between the two caps (10). The lower surface and the front and rear inclined surfaces of the triangular shell (2) are provided with evenly distributed installation grooves. Heating mechanism (3): It includes a base plate (31), a support rod (32), a heating wire (33) and an arc cover (34). The inner side of the base plate (31) is fixedly connected to the arc cover (34). The inner walls of the front and rear sides of the arc cover (34) are fixedly connected to the evenly distributed support rods (32). The support rods (32) are movably sleeved on the outside of the support rods (32). The base plate (31) and the arc cover (34) are respectively set inside the mounting groove. The input end of the heating wire (33) is electrically connected to the output end of the external controller. The circulation mechanism (4) includes a circulation pipe (41) and a connecting pipe (45). The circulation pipes (41) are symmetrically fixed to the upper surface of the support frame (1) and the two circulation pipes (41) are connected to each other through the connecting pipe (45).

2. The heating mechanism of the multilayer co-extrusion sheet machine according to claim 1, characterized in that: The heating mechanism (3) also includes rubber rings (35), which are fixedly connected to the inner side of the base plate (31), and the inner side of the rubber rings (35) is in contact with the outer side of the support frame (1).

3. The heating mechanism of the multilayer co-extrusion sheet machine according to claim 1, characterized in that: The lower surface and the front and rear inclined surfaces of the triangular shell (2) are fixedly connected with uniformly distributed fixing bolts (5). The two vertically adjacent fixing bolts (5) on the front and rear inclined surfaces of the triangular shell (2) are connected to the pressure plate (6) through a nut. The bottom plates (31) on the front and rear sides are respectively clamped between the front and rear inclined surfaces of the triangular shell (2) and the two adjacent pressure plates (6). The two adjacent fixing bolts (5) on the lower surface of the triangular shell (2) are connected to the pressure plate (8) through a nut. The bottom plate (31) on the lower side is respectively clamped between the lower surface of the triangular shell (2) and the two adjacent pressure plates (8).

4. The heating mechanism of the multilayer co-extrusion sheet machine according to claim 1, characterized in that: The triangular shell (2) has uniformly distributed limiting strips (7) on both the front and rear inclined surfaces, and the bottom plates (31) on the front and rear sides are respectively located between two vertically adjacent limiting strips (7).

5. The heating mechanism of the multilayer co-extrusion sheet machine according to claim 1, characterized in that: The lower surfaces of the support rods at the upper end of the support frame (1) are rotatably connected to the limiting plates (9) by pins, and the bottom plate (31) at the lower end is respectively engaged between the lower surface of the triangular shell (2) and the two adjacent limiting plates (9).

6. The heating mechanism of the multilayer co-extrusion sheet machine according to claim 1, characterized in that: The circulation mechanism (4) also includes a blade seat (42), a motor seat (43) and a motor (44). The motor seat (43) is connected to the upper end of the circulation pipe (41) by bolts. The upper surface of the motor seat (43) is fixedly connected to the motor (44). The lower end of the output shaft of the motor (44) is fixedly connected to the blade seat (42). The outer arc surface of the blade seat (42) is provided with uniformly distributed blades. The input end of the motor (44) is electrically connected to the output end of the external controller.

7. The heating mechanism of the multilayer co-extrusion sheet machine according to claim 1, characterized in that: The triangular shell (2) is provided with uniformly distributed fixed seats (11) at both ends. The two fixed seats (11) at the top and the two fixed seats (11) on the same side at the front and back are connected by bolts to pressure plate three (12). The cover (10) is located between the pressure plate three (12) on the same side on the left and right.

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