A multi-layer co-extrusion equipment for high-strength and high-toughness PET sheets

Abstract

This utility model relates to the field of PET sheet production technology and discloses a high-strength, high-toughness PET sheet multilayer co-extrusion equipment, including an extruder body. A filter assembly head is detachably installed at the discharge end of the extruder body. The filter assembly includes a filter seat, a material channel is opened at the discharge end of the filter seat near the extruder body, and a lifting channel is opened at the top of the filter seat. A baffle column is set inside the lifting channel, and filter holes with the same diameter as the material channel are opened at both ends of the baffle column. A filter screen is fixed inside one end of the filter hole. This high-strength, high-toughness PET sheet multilayer co-extrusion equipment separates the filtration function from the internal pipeline of the equipment to form a dedicated filter assembly. When cleaning or replacing the filter screen is required, the filter screen can be quickly accessed for cleaning, which greatly simplifies the operation process and significantly shortens the maintenance time. Furthermore, the dual filter screens can be used alternately to reduce downtime caused by cleaning.

Description

Technical Field

[0001] This utility model relates to the field of PET sheet production technology, and in particular to a multi-layer co-extrusion equipment for high-strength and high-toughness PET sheets. Background Technology

[0002] In the production process of multi-layer co-extruded high-strength and high-toughness PET sheets, the raw materials need to be melted and plasticized separately by multiple extruders before being fed into the co-extrusion die for lamination and extrusion. During the conveying and co-extrusion process, the molten raw materials may be contaminated with impurities due to the purity of the raw materials themselves, equipment wear, or environmental factors. If these impurities are not effectively removed, they will directly affect the transparency, surface smoothness, mechanical properties, and long-term stability of the final sheet. In severe cases, they can lead to crystal points, fisheyes, or weak points in the sheet, causing product downgrading or even scrapping.

[0003] Existing technologies generally rely on built-in filter devices to ensure the cleanliness of downstream flow channels and dies. The filter and its supporting structure are completely built into the equipment pipes or cavities. When the filter is clogged, it is necessary to disassemble the relevant pipes or modules to access the filter. The process is complicated and time-consuming, which seriously affects production efficiency. Moreover, each cleaning or replacement of the filter requires a long downtime. Especially for multi-layer co-extrusion production lines that require continuous and stable operation, frequent downtime for maintenance greatly reduces the overall utilization rate of the equipment and the overall output. Utility Model Content

[0004] In view of the problems mentioned above, the existing methods require disassembling related pipes or modules to access the filter screen, which are complex and time-consuming. This utility model is proposed.

[0005] Therefore, the purpose of this utility model is to provide a multi-layer co-extrusion equipment for high-strength and high-toughness PET sheets, which aims to quickly touch and clean the filter screen, and improve the utilization rate by using two filters alternately.

[0006] To solve the above technical problems, this utility model provides the following technical solution: a multilayer co-extrusion equipment for high-strength and high-toughness PET sheets, including an extruder body, wherein a filter assembly head is detachably installed at the discharge end of the extruder body;

[0007] The filter assembly includes a filter base, a material channel is provided at the discharge end of the filter base near the extruder body, a lifting channel is provided at the top of the filter base, and the material channel and the lifting channel are arranged in a cross shape. A baffle is provided inside the lifting channel, and the baffle moves vertically inside the lifting channel. Both ends of the baffle are provided with filter holes with the same diameter as the material channel. A filter screen is fixed inside one end of the filter hole.

[0008] A drive assembly for raising and lowering the baffle column is installed between the two sides of the filter base, and the baffle column is fixed to the bottom of the movable end of the drive assembly.

[0009] As an improved technical solution, connectors are welded to both sides of the filter seat and at the position opposite the material channel. A connecting pipe is installed at the discharge end of the extruder body through a flange, and the connecting pipe is connected to the connector through the flange.

[0010] As an improved technical solution, guide strips are fixed on both sides of the blocking column, and limiting grooves for sliding of the guide strips are opened on the top of the filter seat and on both sides of the lifting channel.

[0011] As an improved technical solution, the drive assembly includes a lead screw disposed on one side of the filter seat and a light rod disposed on the other side of the filter seat, and a lifting bar is provided between the top ends of the lead screw and the light rod.

[0012] As an improved technical solution, the drive assembly further includes a threaded hole block fixed on the filter seat near the lead screw, and the threaded hole block is threadedly connected to the lead screw through the threaded hole thereon. The end of the lead screw near the lifting bar is rotatably mounted on the lifting bar through a bearing, and a knob is sleeved on the end of the lead screw away from the lifting bar.

[0013] As an improved technical solution, the drive assembly further includes a sliding hole block fixed near the filter seat on the side close to the light rod, and the sliding hole block is slidably connected to the light rod through a sliding hole thereon, and the top end of the light rod is fixed to the bottom of the lifting bar.

[0014] After adopting the above technical solution, the beneficial effects of this utility model are:

[0015] 1. In this utility model, when the stop column is installed inside the lifting channel, the guide strip is first passed through the inside of the limiting groove to limit the installation angle of the stop column, so as to achieve self-alignment of the filter hole and the material channel installation angle. This not only ensures the installation accuracy, but also reduces the debugging time and improves the positioning efficiency.

[0016] 2. This utility model separates the filtration function from the internal pipes of the equipment to form a dedicated filtration component. When cleaning or replacing the filter screen is required, the filter screen can be quickly accessed for cleaning, which greatly simplifies the operation process and significantly shortens the maintenance time. In addition, the dual filter screen setting and alternating use reduce the downtime caused by cleaning. The quick removal and dual screen switching design make cleaning simple, safe and labor-saving, without the need for complicated equipment disassembly, thus improving work efficiency. 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. Among them:

[0018] Figure 1 This is a schematic diagram of the overall structure of a multilayer co-extrusion equipment for high-strength and high-toughness PET sheets according to this utility model.

[0019] Figure 2 This is a partially exploded structural diagram of the filter seat of a multilayer co-extrusion equipment for high-strength and high-toughness PET sheets according to this utility model.

[0020] Figure 3 This is a schematic diagram of the structure of the resistance column in a multilayer co-extrusion equipment for high-strength and high-toughness PET sheets according to this utility model.

[0021] Explanation of reference numerals in the attached figures:

[0022] 1. Extruder body; 2. Connecting pipe; 3. Filter assembly; 4. Filter seat; 5. Connector; 6. Material channel; 7. Drive assembly; 71. Sliding block; 72. Threaded block; 73. Lead screw; 74. Lifting bar; 75. Smooth rod; 76. Knob; 8. Lifting channel; 9. Baffle column; 10. Filter hole; 11. Guide bar; 12. Filter screen. Detailed Implementation

[0023] 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. Example 1

[0024] Reference Figures 1-3 This is the first embodiment of the present invention, which provides a high-strength and high-toughness PET sheet multilayer co-extrusion equipment. This high-strength and high-toughness PET sheet multilayer co-extrusion equipment includes an extruder body 1. The extruder body 1 is a mature existing technology and will not be described in detail. A filter assembly 3 is detachably installed at the discharge end of the extruder body 1. The discharge end of the filter assembly 3 is connected to a co-extrusion die head through a pipe.

[0025] The filter assembly 3 includes a filter seat 4. The filter seat 4 has a material channel 6 at the discharge end near the extruder body 1. The top of the filter seat 4 has a lifting channel 8, and the material channel 6 and the lifting channel 8 are arranged in a cross shape. The lifting channel 8 has a baffle 9 inside, and the baffle 9 moves vertically inside the lifting channel 8. Both ends of the baffle 9 have filter holes 10 with the same diameter as the material channel 6. A filter screen 12 is fixed inside one end of the filter hole 10.

[0026] A drive assembly 7 for driving the rise and fall of the baffle post 9 is installed between the two sides of the filter base 4, and the baffle post 9 is fixed to the bottom of the movable end of the drive assembly 7.

[0027] Connectors 5 are welded on both sides of the filter seat 4 and at the position directly opposite the material channel 6. The connectors 5 and the material channel 6 are coaxially arranged. The discharge end of the extruder body 1 is equipped with a connecting pipe 2 through a flange, and the connecting pipe 2 and the connector 5 are connected through the flange.

[0028] The drive assembly 7 includes a lead screw 73 disposed on one side of the filter seat 4 and a guide rod 75 disposed on the other side of the filter seat 4. A lifting bar 74 is disposed between the top ends of the lead screw 73 and the guide rod 75, and a stop post 9 is fixed to the middle of the bottom of the lifting bar 74.

[0029] The drive assembly 7 also includes a threaded hole block 72 fixed on the side of the filter seat 4 near the lead screw 73, and the threaded hole block 72 is threadedly connected to the lead screw 73 through the threaded hole thereon. The end of the lead screw 73 near the lifting bar 74 is rotatably mounted on the lifting bar 74 through a bearing, and the end of the lead screw 73 away from the lifting bar 74 is fitted with a knob 76.

[0030] The drive assembly 7 also includes a sliding hole block 71 fixed on the side of the filter seat 4 near the light rod 75, and the sliding hole block 71 is slidably connected to the light rod 75 through the sliding hole thereon, and the top end of the light rod 75 is fixed to the bottom of the lifting bar 74.

[0031] Under normal circumstances, the lower filter screen 12 is used for filtration first. When the lower filter screen 12 needs to be cleaned, the knob 76 drives the lead screw 73 to rotate. Under the threaded transmission action between the lead screw 73 and the threaded hole on the threaded block 72, the lead screw 73 drives the lifting bar 74 to move downward, which in turn moves the stop column 9 downward, causing the lower filter screen 12 to disengage from the inside of the material channel 6, and the upper filter screen 12 to take over the filtration position. Conversely, the lower filter screen 12 takes over the filtration position of the material channel 6. The position of the two filter screens 12 can be quickly alternated through the drive component 7, and one filter screen 12 can be moved to the outside of the filter seat 4, which facilitates quick cleaning of the filter screen 12 and improves cleaning efficiency.

[0032] During use, by separating the filtration function from the internal pipes of the equipment to form a dedicated filtration component, when it is necessary to clean or replace the filter screen, the filter screen 12 can be quickly accessed for cleaning, which greatly simplifies the operation process and significantly shortens the maintenance time. In addition, the dual filter screen 12 setting and alternating use reduce the downtime caused by cleaning. The quick removal and dual screen switching design makes cleaning simple, safe and labor-saving, without the need for complicated equipment disassembly, thus improving work efficiency. Example 2

[0033] Reference Figures 2-3 This is the second embodiment of the present invention. The difference between this embodiment and the first embodiment is that: guide strips 11 are fixed on both sides of the blocking column 9, and the top of the filter seat 4 and both sides of the lifting channel 8 are provided with limiting grooves for the guide strips 11 to slide, and the limiting grooves are connected to the interior of the lifting channel 8.

[0034] During use, when installing the stop post 9 inside the lifting channel 8, the guide strip 11 is first passed through the inside of the limiting groove to limit the installation angle of the stop post 9, so as to achieve self-alignment of the installation angle of the filter hole 10 and the material channel 6. This not only ensures the installation accuracy, but also reduces the debugging time and improves the positioning efficiency.

[0035] The remaining structure is the same as that in Example 1.

[0036] Based on embodiments 1-2, the working principle of this utility model is as follows: After the extruder body 1 melts and extrudes the raw material, the molten material enters the interior of the material channel 6 through the connecting pipe 2. When the material moves inside the material channel 6, it will pass through the interior of the filter hole 10 and flow into the co-extrusion die. When the material passes through the interior of the filter hole 10, it is filtered by the filter screen 12 to filter out the impurities inside, so as to ensure the cleanliness of the molten material.

[0037] 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 multilayer co-extrusion equipment for high-strength and high-toughness PET sheets, comprising an extruder body (1), characterized in that: The discharge end of the extruder body (1) is detachably equipped with a filter assembly (3); The filter assembly (3) includes a filter seat (4), a material channel (6) is provided at the discharge end of the filter seat (4) near the extruder body (1), a lifting channel (8) is provided at the top of the filter seat (4), and the material channel (6) and the lifting channel (8) are arranged in a cross shape. A baffle column (9) is provided inside the lifting channel (8), and the baffle column (9) moves vertically inside the lifting channel (8). Both ends of the baffle column (9) are provided with filter holes (10) with the same diameter as the material channel (6), and a filter screen (12) is fixed inside one end of the filter hole (10). A drive assembly (7) for driving the rise and fall of the stop column (9) is installed between the two sides of the filter seat (4), and the stop column (9) is fixed at the bottom of the movable end of the drive assembly (7).

2. The high-strength, high-toughness PET sheet multilayer co-extrusion equipment according to claim 1, characterized in that: Connectors (5) are welded on both sides of the filter seat (4) and at the position directly opposite the material channel (6). A connecting pipe (2) is installed at the discharge end of the extruder body (1) through a flange, and the connecting pipe (2) and the connector (5) are connected through a flange.

3. The high-strength, high-toughness PET sheet multilayer co-extrusion equipment according to claim 2, characterized in that: Guide bars (11) are fixed on both sides of the blocking column (9), and limiting grooves for sliding of the guide bars (11) are provided on the top of the filter seat (4) and on both sides of the lifting channel (8).

4. The high-strength, high-toughness PET sheet multilayer co-extrusion equipment according to claim 3, characterized in that: The drive assembly (7) includes a lead screw (73) disposed on one side of the filter seat (4) and a light rod (75) disposed on the other side of the filter seat (4). A lifting bar (74) is provided between the top ends of the lead screw (73) and the light rod (75).

5. The high-strength, high-toughness PET sheet multilayer co-extrusion equipment according to claim 4, characterized in that: The drive assembly (7) also includes a threaded hole block (72) fixed on the filter seat (4) near the lead screw (73), and the threaded hole block (72) is threadedly connected to the lead screw (73) through the threaded hole thereon. The end of the lead screw (73) near the lifting bar (74) is rotatably mounted on the lifting bar (74) through a bearing, and the end of the lead screw (73) away from the lifting bar (74) is fitted with a knob (76).

6. The high-strength, high-toughness PET sheet multilayer co-extrusion equipment according to claim 5, characterized in that: The drive assembly (7) also includes a sliding hole block (71) fixed on the side near the filter seat (4) and near the light rod (75), and the sliding hole block (71) is slidably connected to the light rod (75) through the sliding hole thereon, and the top end of the light rod (75) is fixed to the bottom of the lifting bar (74).

Images