Vacuum equipment of PET (Polyethylene Terephthalate) sheet extruder

Abstract

The utility model provides vacuum equipment of a PET (polyethylene terephthalate) sheet extruder, which comprises an extrusion box of the extruder and a vacuum pump, the vacuum pump is fixedly connected to one side of the top of the extrusion box, two sides of the top of the extrusion box are fixedly connected with mounting seats, and a sealing box is fixedly connected between the tops of the two mounting seats. Compared with the prior art, the pipe orifice dredging device has the following beneficial effects that clockwise rotating switches at the output ends of motors in the three pipe orifice dredging assemblies are simultaneously started, so that three threaded sleeves can be driven to slide on a limiting plate from top to bottom, and then three push blocks can be moved out from the interiors of three exhaust pipes from top to bottom; and in the pushing-out process of the pushing block, the PET raw material blocking the pipe opening in the bottom end of the exhaust pipe is pushed downwards and scraped away through the sealing rubber sleeve, the pipe opening of the exhaust pipe can be rapidly cleaned, the phenomenon that the PET raw material blocks a vacuum pipeline in the exhaust process of the cleaned end opening of the exhaust pipe is avoided, and the service life of vacuum equipment is effectively prolonged.

Description

Technical Field

[0001] The utility model relates to vacuum equipment for a PET sheet extruder, belonging to the field of PET sheet extrusion equipment. Background Art

[0002] PET material, commonly known as polyester resin, is the main type of thermoplastic polyester. PET is divided into fiber-grade polyester chips and non-fiber-grade polyester chips. Fiber-grade polyester is used to make polyester staple fibers and polyester filaments, and is the raw material for polyester fiber companies to process fibers and related products.

[0003] In the prior art, a vacuum pump is connected to the extruder, and before the extrusion process is performed, the vacuum pump is started to extract the air inside the extruder, and the internal heating structure is vacuum treated before operation to reduce the internal air pressure, so that the internal temperature rises faster, and at the same time, the internal air can be prevented from affecting the processed PET sheet. However, during the extrusion process of the extruder, PET material residues are likely to appear inside the pipe mouth of the exhaust pipe, and the pipe mouth is likely to be blocked. When the vacuum pump is started again, the PET material will be sucked into the vacuum equipment, thereby causing the vacuum equipment to malfunction and shortening the service life of the vacuum equipment.

[0004] In summary, the utility model provides a vacuum device for a PET sheet extruder to solve the above problems. Utility Model Content

[0005] In view of the deficiencies in the prior art, the utility model aims to provide a vacuum device for a PET sheet extruder to solve the problem in the above-mentioned background technology that the PET material remaining at the nozzle is sucked into the interior of the vacuum device.

[0006] In order to achieve the above-mentioned purpose, the utility model is realized through the following technical scheme: a vacuum device of a PET sheet extruder, comprising an extrusion box and a vacuum pump of the extruder, the vacuum pump being fixedly connected to one side of the top of the extrusion box, both sides of the top of the extrusion box being fixedly connected with mounting seats, a sealing box being fixedly connected between the tops of the two mounting seats, an air inlet of the vacuum pump being connected with an air inlet pipe, one end of the air inlet pipe extending to the top of the sealing box, connecting pipes being connected between both sides of the bottom of the air inlet pipe surface and both sides of the top of the sealing box, a limiting plate being fixedly connected between the four sides of the inner wall of the sealing box, ventilation holes being provided between the top and the bottom of the limiting plate and directly below the two connecting pipes, and three pipe orifice dredging components being passed through from left to right in sequence between the top of the sealing box and the top of the extrusion box.

[0007] Furthermore, one end of the air inlet pipe away from the vacuum pump is blocked, and the upper and lower parts of the limit plate are connected through a ventilation hole.

[0008] Furthermore, the pipe orifice clearing assembly includes a chassis and an exhaust pipe, the chassis is fixedly connected to the top of the sealing box, the exhaust pipe passes through between the top of the extrusion box and the bottom of the sealing box and is located directly below the chassis, the inside of the chassis is fixedly connected to a motor, the output end of the motor is fixedly connected to a driving screw, one end of the driving screw passes through the chassis and the sealing box in sequence and extends to the inside of the sealing box, the bottom end of the driving screw is sleeved with a threaded sleeve, one end of the threaded sleeve passes through the top of the limit plate and the top of the exhaust pipe and extends to the inside of the exhaust pipe, one end of the threaded sleeve is located inside the exhaust pipe and is fixedly connected to a push block, and the outer sleeve of the push block is sleeved with a sealing rubber sleeve.

[0009] Furthermore, the top end of the air extraction pipe is connected to the interior of the sealing box, and the bottom end of the air extraction pipe is connected to the interior of the extrusion box.

[0010] Furthermore, the push block is sealed and slidably connected with the air extraction pipe via a sealing rubber sleeve, and the driving screw is rotationally connected with the chassis.

[0011] Furthermore, the driving screw is rotatably connected to the sealing box, and the driving screw is threadedly connected to the threaded sleeve.

[0012] Furthermore, the top edge of the threaded sleeve protrudes outward, both sides of the threaded sleeve are in the shape of convex strips, and the threaded sleeve is slidably connected to the limiting plate.

[0013] Beneficial effects of the utility model:

[0014] By simultaneously starting the motor output ends inside the three pipe orifice clearing components and rotating the switches clockwise, the three threaded sleeves can be driven to slide on the limit plate from top to bottom at the same time, and then the three push blocks can be moved out from the three exhaust pipes from top to bottom. During the pushing process of the push blocks, the PET raw materials blocking the pipe orifices at the bottom ends of the exhaust pipes can be pushed downward and scraped off through the sealing rubber sleeves, so the pipe orifices of the exhaust pipes can be quickly cleaned. After the exhaust pipe ports have been cleaned, the PET raw materials will not jam the vacuum pipes during the exhaust process, thereby effectively improving the service life of the vacuum equipment.

[0015] Start the motor output end inside the three pipe opening clearing components and turn the switch counterclockwise, which can then drive the three threaded sleeves to move upward and reset, and then move the push block to the inside of the exhaust pipe, and seal the port of the exhaust pipe with a sealing rubber sleeve. The sealing rubber sleeve can improve the sealing between the push block and the exhaust pipe, so that during the plastic extrusion process inside the extrusion box, the melted PET material will not squeeze into the inside of the exhaust pipe, effectively improving the cleaning convenience of the vacuum equipment pipeline. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Other features, objects and advantages of the present invention will become more apparent by reading the detailed description of non-limiting embodiments with reference to the following drawings:

[0017] Figure 1 This is a schematic structural perspective view of a vacuum device of a PET sheet extruder of the utility model;

[0018] Figure 2 This is a schematic front view of the structure of a vacuum device of a PET sheet extruder of the utility model;

[0019] Figure 3 for Figure 2 The structure of the sealing box shown is schematically shown in the main cross-sectional view;

[0020] Figure 4 for Figure 3 The structure of the threaded sleeve is schematically shown in a top cross-sectional view.

[0021] In the figure: 1. extrusion box; 2. vacuum pump; 3. mounting base; 4. sealing box; 5. air inlet pipe; 6. connecting pipe; 7. limit plate; 8. ventilation hole; 9. pipe opening dredging assembly; 91. chassis; 92. exhaust pipe; 93. motor; 94. driving screw; 95. threaded sleeve; 96. push block; 97. sealing rubber sleeve. DETAILED DESCRIPTION

[0022] In order to make the technical means, creative features, objectives and effects achieved by the present invention easy to understand, the present invention is further described below in conjunction with specific implementation methods.

[0023] See also Figure 1-4The utility model provides a technical solution: a vacuum device for a PET sheet extruder, comprising an extrusion box 1 and a vacuum pump 2 of the extruder, the vacuum pump 2 being fixedly connected to one side of the top of the extrusion box 1, both sides of the top of the extrusion box 1 being fixedly connected with mounting seats 3, a sealing box 4 being fixedly connected between the tops of the two mounting seats 3, an air inlet of the vacuum pump 2 being connected with an air inlet pipe 5, one end of the air inlet pipe 5 extending to the top of the sealing box 4, connecting pipes 6 being connected between both sides of the bottom of the air inlet pipe 5 and both sides of the top of the sealing box 4, a limiting plate 7 being fixedly connected between the four sides of the inner wall of the sealing box 4, a ventilation hole 8 being provided between the top and the bottom of the limiting plate 7 and directly below the two connecting pipes 6, the top of the sealing box 4 and the extrusion box 1 There are three pipe orifice dredging components 9 running through the top from left to right in sequence. The extrusion box 1 is the processing box of the extruder. The extruder is a device used to extrude molten material into a specific shape through pressure. It is usually used in plastic processing and molding. The molten plastic is extruded through the screw and barrel combination of the extruder to form a continuous PET sheet. The end of the air inlet pipe 5 away from the vacuum pump 2 is blocked, and the upper and lower parts of the limit plate 7 are connected through the ventilation hole 8. The vacuum pump 2 is a device used to extract the enclosed space into a low pressure or vacuum state. It creates and maintains a negative pressure environment to extract the gas from the closed container, thereby achieving the purpose of reducing the pressure. The vacuum pump 2 is connected to an external power supply and is provided with a power control switch.

[0024] See also Figure 2-4 , the pipe orifice dredging component 9 includes a chassis 91 and an exhaust pipe 92, the chassis 91 is fixedly connected to the top of the sealing box 4, the exhaust pipe 92 passes through the top of the extrusion box 1 and the bottom of the sealing box 4 and is located directly below the chassis 91, the chassis 91 is fixedly connected to a motor 93, the output end of the motor 93 is fixedly connected to a driving screw 94, one end of the driving screw 94 passes through the chassis 91 and the sealing box 4 in turn and extends to the inside of the sealing box 4, the bottom end of the driving screw 94 is sleeved with a threaded sleeve 95, one end of the threaded sleeve 95 passes through the top of the limit plate 7 and the top of the exhaust pipe 92 and extends to the inside of the exhaust pipe 92, one end of the threaded sleeve 95 and the inside of the exhaust pipe 92 is fixedly connected with a push block 96, the outer sleeve of the push block 96 is provided with a sealing rubber sleeve 97, the motors 93 inside the three pipe orifice dredging components 9 are all connected to an external power supply and are provided with the same power control switch, the three motors 93 are all three-phase asynchronous motors, and the output end can be adjusted for forward and reverse rotation at the same time.

[0025] See also Figure 2-4The top end of the exhaust pipe 92 is connected to the interior of the sealing box 4, and the bottom end of the exhaust pipe 92 is connected to the interior of the extrusion box 1. The push block 96 is sealed and slidable with the exhaust pipe 92 through the sealing rubber sleeve 97. The sealing rubber sleeve 97 can improve the sealing between the push block 96 and the exhaust pipe 92, so that during the extrusion process of the PET raw material inside the extrusion box 1, the melted PET raw material will not squeeze into the interior of the exhaust pipe 92, the driving screw 94 is rotatably connected to the chassis 91, the driving screw 94 is rotatably connected to the sealing box 4, the driving screw 94 is threadedly connected to the threaded sleeve 95, the top edge of the threaded sleeve 95 protrudes outward, and both sides of the threaded sleeve 95 are convex strips. The threaded sleeve 95 is slidably connected to the limit plate 7. When the driving screw 94 rotates forward and backward, the threaded sleeve 95 can be driven to slide up and down on the limit plate 7, and the top protrusion of the threaded sleeve 95 has a limiting effect on the threaded sleeve 95, so that the threaded sleeve 95 will not be separated from the sliding connection with the limit plate 7.

[0026] Specific implementation method: By simultaneously starting the output end of the motor 93 inside the three pipe opening dredging components 9 and rotating the switch clockwise, the three threaded sleeves 95 can be driven to slide from top to bottom on the limit plate 7 at the same time, and then the three push blocks 96 can be moved out from the inside of the three exhaust pipes 92 from top to bottom. During the process of pushing the push blocks 96, the PET raw material blocked at the bottom end of the exhaust pipe 92 is pushed downward and scraped off by the sealing rubber sleeve 97, so that the exhaust pipe 92 can be quickly cleaned. At the same time, the exhaust pipe 92 is opened, and then the vacuum pump 2 is started, and the air intake pipe 5 is simultaneously The air inside the two connecting pipes 6 is extracted, and the two connecting pipes 6 simultaneously extract the air inside the sealing box 4, and are connected to the top and bottom of the limit plate 7 through the ventilation hole 8, so as to ensure the normal extraction of air, and the air inside the three exhaust pipes 92 is extracted simultaneously through the sealing box 4, and the air inside the extrusion box 1 is extracted simultaneously through the three exhaust pipes 92, so as to achieve the conditions for the extruder to extrude the PET sheet. The ports of the exhaust pipes 92 that have been cleaned will not have the phenomenon of PET raw materials blocking the vacuum pipe during the exhaust process, thereby effectively improving the service life of the vacuum equipment.

[0027] After the air inside the extrusion box 1 is extracted, the PET sheet needs to be extruded, so it is necessary to start the output end of the motor 93 inside the three pipe opening clearing components 9 and turn the switch counterclockwise, which can then drive the three threaded sleeves 95 to move upward and reset, and then the push block 96 can be moved to the inside of the exhaust pipe 92, and the port of the exhaust pipe 92 can be sealed by the sealing rubber sleeve 97. The sealing rubber sleeve 97 can improve the sealing between the push block 96 and the exhaust pipe 92, so that during the plastic extrusion process inside the extrusion box 1, the melted PET material will not squeeze into the inside of the exhaust pipe 92, which effectively improves the cleaning convenience of the vacuum equipment pipeline.

[0028] In addition, it should be understood that although the present specification is described according to implementation modes, not every implementation mode contains only one independent technical solution. This description of the specification is only for the sake of clarity. Those skilled in the art should regard the specification as a whole. The technical solutions in each embodiment may also be appropriately combined to form other implementation modes that can be understood by those skilled in the art.

Claims

1. A vacuum device for a PET sheet extruder, comprising an extrusion box (1) and a vacuum pump (2) of the extruder, characterized in that: The vacuum pump (2) is fixedly connected to one side of the top of the extrusion box (1), and mounting seats (3) are fixedly connected to both sides of the top of the extrusion box (1). A sealing box (4) is fixedly connected between the tops of the two mounting seats (3). The air inlet of the vacuum pump (2) is connected to an air inlet pipe (5), and one end of the air inlet pipe (5) extends to the top of the sealing box (4). Connecting pipes (6) are connected between both sides of the bottom of the air inlet pipe (5) and both sides of the top of the sealing box (4). A limiting plate (7) is fixedly connected between the four sides of the inner wall of the sealing box (4). Ventilation holes (8) are provided between the top and bottom of the limiting plate (7) and directly below the two connecting pipes (6). Three pipe opening dredging components (9) are sequentially passed through from left to right between the top of the sealing box (4) and the top of the extrusion box (1).

2. The vacuum equipment of a PET sheet extruder according to claim 1, characterized in that: The end of the air inlet pipe (5) away from the vacuum pump (2) is in a blocked state, and the upper and lower parts of the limit plate (7) are connected via a ventilation hole (8).

3. The vacuum equipment of a PET sheet extruder according to claim 1, characterized in that: The pipe opening dredging assembly (9) comprises a chassis (91) and an air extraction pipe (92), wherein the chassis (91) is fixedly connected to the top of the sealing box (4), the air extraction pipe (92) passes through between the top of the extrusion box (1) and the bottom of the sealing box (4) and is located directly below the chassis (91), a motor (93) is fixedly connected to the inside of the chassis (91), and a driving screw (94) is fixedly connected to the output end of the motor (93), and one end of the driving screw (94) is connected in sequence to the motor (93). The driving screw (94) penetrates the chassis (91) and the sealing box (4) and extends to the interior of the sealing box (4); the bottom end of the driving screw (94) is sleeved with a threaded sleeve (95); one end of the threaded sleeve (95) penetrates the top of the limiting plate (7) and the top of the exhaust pipe (92) and extends to the interior of the exhaust pipe (92); one end of the threaded sleeve (95) is located inside the exhaust pipe (92) and is fixedly connected with a push block (96); the outer side of the push block (96) is sleeved with a sealing rubber sleeve (97).

4. The vacuum equipment of a PET sheet extruder according to claim 3, characterized in that: The top end of the air extraction pipe (92) is connected to the interior of the sealing box (4), and the bottom end of the air extraction pipe (92) is connected to the interior of the extrusion box (1).

5. The vacuum equipment of a PET sheet extruder according to claim 3, characterized in that: The push block (96) is sealed and slidably connected to the air extraction pipe (92) via a sealing rubber sleeve (97), and the driving screw (94) is rotationally connected to the chassis (91).

6. The vacuum equipment of a PET sheet extruder according to claim 3, characterized in that: The driving screw (94) is rotatably connected to the sealing box (4), and the driving screw (94) is threadedly connected to the threaded sleeve (95).

7. The vacuum equipment of a PET sheet extruder according to claim 3, characterized in that: The top edge of the threaded sleeve (95) protrudes outwards, and both sides of the threaded sleeve (95) are in the shape of convex strips. The threaded sleeve (95) is slidably connected to the limiting plate (7).

Images