PET decorative film blowing and extruding mechanism

Abstract

The utility model discloses a PET (Polyethylene Terephthalate) decorative film blowing extrusion mechanism, which relates to the technical field of PET decorative films, and comprises a screw extruder, the end part of the screw extruder is communicated with a discharge port, the end part of the screw extruder is fixedly connected with a first rotating shaft, the middle part of the first rotating shaft is rotatably connected with a first gear, the side wall of the first gear is fixedly connected with a chuck, and the chuck is fixedly connected with a second gear. A plurality of filter screens are installed in the middle of the chuck, the filter screens are arranged corresponding to the discharging port, a first motor is fixedly connected to the side wall of the screw extruder, and a second gear is fixedly connected to the output end of the first motor. According to the technical scheme, molten raw materials can be conveniently filtered during feeding, so that the situation that impurities in the raw materials affect the film blowing forming effect is reduced, meanwhile, the filter screen can be conveniently replaced, and the situation that when blockage is caused by using one filter screen, the whole structure needs to be disassembled and then installed, and the machining continuity is affected is reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of PET decorative films, and more specifically, to a PET decorative film blowing and extrusion mechanism. Background Art

[0002] PET decorative film, also known as polyester film decorative film, is a thermoplastic plastic material made of polyethylene terephthalate. It has excellent heat resistance, chemical corrosion resistance, high strength and toughness and is widely used in the decoration industry.

[0003] Existing PET decorative films are usually made by film blowing machines. The plastic raw materials are heated and melted into molten plastic in an extruder mechanism, and then the molten plastic is fed into the film blowing machine through a screw conveying mechanism to be formed into a film. During long-term use observation, it was found that a filter is used between the existing extruder mechanism and the film blowing machine to filter the incoming plastic raw materials to reduce impurities in the raw materials that lead to impurities in the formed film. The filter is usually fixed on the extruder mechanism, resulting in a large amount of impurities adhering to the filter, and it needs to be disassembled and reassembled, which is inconvenient to replace, thus affecting the processing continuity. Utility Model Content

[0004] In order to overcome the deficiencies of the prior art, the utility model provides a PET decorative film blowing and extrusion mechanism, which has the advantage of being easy to replace a feed filter screen.

[0005] To achieve the above-mentioned object, the utility model provides the following technical solution: a PET decorative film blown film extrusion mechanism, comprising a screw extruder, wherein the end of the screw extruder is connected to a discharge port, the end of the screw extruder is fixedly connected to a first rotating shaft, the middle portion of the first rotating shaft is rotatably connected to a first gear, the side wall of the first gear is fixedly connected to a chuck, a plurality of filters are installed in the middle portion of the chuck, and the filters are arranged corresponding to the discharge port, the side wall of the screw extruder is fixedly connected to a first motor, the output end of the first motor is fixedly connected to a second gear, the second gear and the first gear are meshed with each other, a pair of support frames are fixedly connected to the bottom of the screw extruder, and a feeding assembly is provided on the top of the screw extruder. Through the above-mentioned structure, the chuck and the plurality of filters are provided, and the first motor, the second gear and the first gear are used in conjunction with each other, so that the melted raw material can be filtered during feeding to reduce the situation where impurities in the raw material affect the blown film molding effect. At the same time, the filter can be easily replaced to reduce the situation where the entire structure needs to be disassembled and reinstalled when a filter is used and causes blockage, thereby affecting the continuity of processing.

[0006] As an optimal technical solution of the present invention, the feeding assembly includes a feeding hopper, which is fixedly connected to the top of the screw extruder, a hot air blower is fixedly connected to the side wall of the feeding hopper, an air guide frame is fixedly connected to the inner wall of the feeding hopper, the air guide frame and the hot air blower are connected through a pipeline, an air outlet is provided at the bottom of the air guide frame, and a feeding port is provided at the top of the feeding hopper. Through the above structure, a hot air blower is provided to connect the air guide frame, and the raw materials can be preheated from the feeding hopper when adding the raw materials to increase the melting speed of the raw materials in the screw extruder, which can reduce the situation where the raw materials melt slowly and cause accumulation and blockage.

[0007] As a preferred technical solution of the present invention, a second motor is fixedly connected to the top of the feed hopper, a second rotating shaft is fixedly connected to the output end of the second motor, and a plurality of stirring rods are fixedly connected to the side wall of the second rotating shaft. Through the above structure, a second motor is provided to connect the second rotating shaft and the stirring rods, so as to stir the raw materials in the feed hopper to reduce the raw materials from sticking to each other to form lumps, resulting in a slow melting speed and blockage in the screw extruder.

[0008] As a preferred technical solution of the present invention, a pair of fixed plates are fixed to the bottom of the screw extruder, a plurality of damping springs are fixed to the bottom of the fixed plates, and the damping springs are fixed to the top of the support frame. Through the above structure, the fixed plates and the damping springs are arranged to buffer and reduce vibration of the whole, so as to reduce the situation where the connection of the whole becomes loose due to vibration, thereby affecting the service life of the whole, and thus improving the stability of the whole during use.

[0009] As an optimal technical solution of the present invention, a protective cover is fixedly connected to the bottom of the air guide frame, and the protective cover has a mesh structure. Through the above structure, the provision of the protective cover can reduce the raw materials from entering the air guide frame from the air outlet, resulting in the air guide frame and the air outlet being blocked by the raw materials.

[0010] As a preferred technical solution of the present invention, a pair of scrapers are fixedly connected to the side wall of the second rotating shaft, and the pair of scrapers are symmetrically arranged. The top of the scraper is in contact with the protective cover. Through the above structure, the scraper is connected to the second rotating shaft, and the scraper can be driven to rotate by the second rotating shaft to scrape the surface of the protective cover to reduce the adhesion of raw materials to the protective cover, causing the protective cover to be blocked and affecting the entry of hot air into the feed hopper.

[0011] Compared with the prior art, the beneficial effects of the present invention are as follows:

[0012] 1. The utility model provides a chuck and multiple filters, and uses a first motor, a second gear and a first gear in conjunction with the first motor to facilitate filtering of the melted raw materials during feeding, thereby reducing the situation where impurities in the raw materials affect the film blowing effect. At the same time, it is convenient to replace the filter, thereby reducing the situation where the entire structure needs to be disassembled and reinstalled when a filter is used and causes blockage, thereby affecting the continuity of processing.

[0013] 2. The utility model provides a hot air blower connected to the air guide frame, which can preheat the raw materials from the feed hopper when adding the raw materials, so as to increase the melting speed of the raw materials in the screw extruder and reduce the accumulation and blockage caused by slow melting of the raw materials. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 It is a three-dimensional diagram of the utility model;

[0015] Figure 2 This is a schematic diagram of the structure of the chuck in the utility model;

[0016] Figure 3 This is a schematic structural diagram of the stirring rod in the present utility model;

[0017] Figure 4 This is a schematic diagram of the structure of the protective cover in the utility model;

[0018] In the figure: 1. Screw extruder; 11. Discharge port; 12. First rotating shaft; 13. First gear; 14. Chuck; 15. Filter; 16. First motor; 17. Second gear; 18. Support frame; 2. Feed hopper; 21. Hot air blower; 22. Air guide frame; 23. Air outlet; 24. Feed port; 3. Second motor; 31. Second rotating shaft; 32. Stirring rod; 4. Fixed plate; 41. Damping spring; 5. Protective cover; 6. Scraper; 7. Insulation cotton. DETAILED DESCRIPTION

[0019] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0020] like Figures 1 to 4As shown, the utility model provides a PET decorative film blowing extrusion mechanism, which includes a screw extruder 1, the end of the screw extruder 1 is connected to a discharge port 11, the end of the screw extruder 1 is fixedly connected to a first rotating shaft 12, the middle of the first rotating shaft 12 is rotatably connected to a first gear 13, the side wall of the first gear 13 is fixedly connected to a chuck 14, the middle of the chuck 14 is installed with a plurality of filters 15, the filters 15 are arranged corresponding to the discharge port 11, the side wall of the screw extruder 1 is fixedly connected to a first motor 16, the output end of the first motor 16 is fixedly connected to a second gear 17, the second gear 17 and the first gear 13 are meshed with each other, a pair of support frames 18 are fixedly connected to the bottom of the screw extruder 1, and a feeding assembly is provided on the top of the screw extruder 1. When working, the screw extruder 1 is connected to the film blowing machine together. , and then the PET raw material particles are added into the screw extruder 1 through the feeding assembly, and then the raw materials are heated and melted in the screw extruder 1, and then transported to the discharge port 11 through the screw. When the melted raw material enters the film blowing machine from the discharge port 11, it will be filtered through the filter 15 to filter out impurities in the raw material. After a period of use, impurities will adhere to the filter 15, resulting in a decrease in the filtering effect. At this time, the first motor 16 can be started to drive the second gear 17 to rotate, and then the second gear 17 will drive the first gear 13 and the chuck 14 to rotate. When the chuck 14 rotates, it will drive the filter 15 to rotate. At this time, the other unused filter 15 can be rotated to the position of the discharge port 11, and the used filter 15 will be turned out from the discharge port 11. Then the filter 15 with impurities can be cleaned or replaced.

[0021] By providing a chuck 14 and a plurality of filter screens 15, and using the first motor 16, the second gear 17 and the first gear 13 in conjunction, it is possible to facilitate filtering of the melted raw materials during feeding, so as to reduce the situation where impurities in the raw materials affect the film blowing effect. At the same time, it is possible to facilitate replacement of the filter screens 15, so as to reduce the situation where, when a filter screen 15 is used and causes blockage, the entire structure needs to be disassembled and reinstalled, thereby affecting the continuity of the processing.

[0022] like Figures 1 to 3 As shown, the feeding assembly includes a feed hopper 2, the feed hopper 2 is fixedly connected to the top of the screw extruder 1, the side wall of the feed hopper 2 is fixedly connected to a hot air blower 21, the inner wall of the feed hopper 2 is fixedly connected to an air guide frame 22, the air guide frame 22 is connected to the hot air blower 21 through a pipeline, the bottom of the air guide frame 22 is provided with an air outlet 23, and the top of the feed hopper 2 is provided with a feed port 24. During operation, when adding PET raw material particles, the hot air blower 21 is first started to inject hot air into the air guide frame 22, and then the hot air is blown into the feed hopper 2 from the air outlet 23. At this time, the feed hopper 2 can be heated, and then the raw materials are added to the feed hopper 2 from the feed port 24. When the raw materials pass through the feed hopper 2 and enter the screw extruder 1, the raw materials can be preheated.

[0023] A hot air blower 21 is connected to the air guide frame 22 to preheat the raw materials from the feed hopper 2 when adding the raw materials, so as to increase the melting speed of the raw materials in the screw extruder 1 and reduce the accumulation and blockage caused by slow melting of the raw materials.

[0024] like Figures 3 and 4 As shown, a second motor 3 is fixedly connected to the top of the feed hopper 2, a second rotating shaft 31 is fixedly connected to the output end of the second motor 3, and a plurality of stirring rods 32 are fixedly connected to the side wall of the second rotating shaft 31. During operation, when raw materials are added to the feed hopper 2, the second motor 3 can be started to drive the second rotating shaft 31 and the stirring rod 32 to rotate. At this time, the stirring rod 32 rotates in the feed hopper 2, and the raw materials in the feed hopper 2 can be stirred, and the raw materials can be broken up at this time.

[0025] By providing a second motor 3 connected to the second rotating shaft 31 and the stirring rod 32, the raw materials in the feed hopper 2 can be stirred to reduce the raw materials from sticking to each other to form agglomerates, resulting in a slow melting speed and blockage in the screw extruder 1.

[0026] like Figure 1 As shown, a pair of fixed plates 4 are fixed to the bottom of the screw extruder 1, and a plurality of damping springs 41 are fixed to the bottom of the fixed plate 4. The damping spring 41 is fixed to the top of the support frame 18. During operation, when the raw materials are stirred and the raw materials are rotated and transported in the screw extruder 1, the screw extruder 1 as a whole will vibrate. When the vibration is transmitted to the damping spring 41, the damping spring 41 can buffer and reduce vibration through its own continuous rebound and contraction.

[0027] By providing the fixing plate 4 and the damping spring 41 , the whole can be buffered and vibration-reduced to reduce the situation where the connection of the whole becomes loose due to vibration, thereby reducing the impact on the service life of the whole, thereby improving the stability of the whole during use.

[0028] like Figures 3 and 4 As shown, a protective cover 5 is fixed to the bottom of the air guide frame 22, and the protective cover 5 has a mesh structure. During operation, when hot air is blown from the air outlet 23 into the feed hopper 2, it will pass through the holes between the protective cover 5 and enter the feed hopper 2. When the raw materials are stirred in the feed hopper 2, the protective cover 5 will block the raw materials on the surface.

[0029] The protective cover 5 can reduce the risk of the raw materials entering the air guide frame 22 from the air outlet 23 , which may cause the air guide frame 22 and the air outlet 23 to be blocked by the raw materials.

[0030] like Figure 4As shown, a pair of scrapers 6 are fixedly connected to the side walls of the second rotating shaft 31, and the pair of scrapers 6 are symmetrically arranged. The tops of the scrapers 6 are in contact with the protective cover 5. During operation, when hot air is blown out from the air outlet 23 and passes through the protective cover 5, the temperature at the protective cover 5 will become high, and the surface of the raw material will be partially melted, causing it to adhere to the protective cover 5. At this time, the second rotating shaft 31 drives the scraper 6 to rotate, which will scrape the surface of the protective cover 5 and scrape off the raw material adhering to the protective cover 5.

[0031] By setting a scraper 6 connected to the second rotating shaft 31, the scraper 6 can be driven by the second rotating shaft 31 to rotate and scrape the surface of the protective cover 5 to reduce the adhesion of raw materials to the protective cover 5, causing the protective cover 5 to be blocked and affecting the hot air from entering the feed hopper 2.

[0032] like Figure 1 As shown, the side wall of the screw extruder 1 is fixed with insulation cotton 7. During operation, when the raw materials are heated and transported in the screw extruder 1, the insulation cotton 7 is located outside the screw extruder 1 to reduce the heat loss from the screw extruder 1 to the outside.

[0033] The provision of the heat-insulating cotton 7 can reduce heat loss in the screw extruder 1, thereby improving energy utilization.

[0034] The working principle and use process of the utility model are as follows: the screw extruder 1 is connected to the film blowing machine, and the PET raw material particles are added into the screw extruder 1 through the feeding assembly. The raw materials are then heated and melted in the screw extruder 1 and then transported to the discharge port 11 through the screw. When the melted raw materials enter the film blowing machine from the discharge port 11, they will be filtered through the filter 15 to filter out impurities in the raw materials. After a period of use, the impurities will adhere to the filter 15, resulting in a decrease in the filtering effect. At this time, the first motor 16 can be started to drive the second gear 17 to rotate, and then the second gear 17 will Drive the first gear 13 and the chuck 14 to rotate. When the chuck 14 rotates, it will drive the filter 15 to rotate. At this time, the other unused filter 15 can be rotated to the position of the discharge port 11, and the used filter 15 is turned out from the discharge port 11. Then the filter 15 with impurities can be cleaned or replaced. When adding PET raw material particles, first start the hot air blower 21 to inject hot air into the air guide frame 22, and then the hot air is blown into the feed hopper 2 from the air outlet 23. At this time, the feed hopper 2 can be heated, and then the raw materials are added to the feed hopper 2 from the feed port 24. When the raw materials pass through the feed hopper 2, When the raw materials enter the screw extruder 1, the raw materials can be preheated. When the raw materials are added to the feed hopper 2, the second motor 3 can be started to drive the second rotating shaft 31 and the stirring rod 32 to rotate. At this time, the stirring rod 32 rotates in the feed hopper 2 to stir the raw materials in the feed hopper 2. At this time, the raw materials can be broken up. When the raw materials are stirred and the raw materials are rotated and transported in the screw extruder 1, the screw extruder 1 as a whole will vibrate. When the vibration is transmitted to the damping spring 41, the damping spring 41 can buffer and reduce vibration by its own continuous rebound and contraction. When hot air is blown into the feed hopper 2 from the air outlet 23, The raw materials enter the feed hopper 2 through the holes between the protective covers 5. When the raw materials are stirred in the feed hopper 2, the protective cover 5 will block the raw materials on the surface. When the hot air is blown out from the air outlet 23 and passes through the protective cover 5, the temperature at the protective cover 5 will become high, which will cause the surface of the raw materials to melt and cause them to adhere to the protective cover 5. At this time, the second rotating shaft 31 drives the scraper 6 to rotate, which will scrape the surface of the protective cover 5 to scrape off the raw materials adhering to the protective cover 5. When the raw materials are heated and transported in the screw extruder 1, the thermal insulation cotton 7 is located outside the screw extruder 1 to reduce the heat loss from the screw extruder 1 to the outside.

[0035] It should be noted that, in this document, relational terms such as first and second, etc., are used only to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any actual relationship or order between these entities or operations. Moreover, the terms "comprises," "comprising," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that includes a list of elements includes not only those elements but also other elements not explicitly listed, or elements inherent to such process, method, article, or apparatus.

[0036] Although the 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 variations may be made to these embodiments without departing from the principles and spirit of the present invention, and the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A PET decorative film blowing extrusion mechanism, comprising a screw extruder (1), characterized in that: The end of the screw extruder (1) is connected to a discharge port (11), the end of the screw extruder (1) is fixedly connected to a first rotating shaft (12), the middle of the first rotating shaft (12) is rotatably connected to a first gear (13), the side wall of the first gear (13) is fixedly connected to a chuck (14), the middle of the chuck (14) is equipped with a plurality of filter screens (15), the filter screens (15) are arranged corresponding to the discharge port (11), the side wall of the screw extruder (1) is fixedly connected to a first motor (16), the output end of the first motor (16) is fixedly connected to a second gear (17), the second gear (17) and the first gear (13) are meshed with each other, a pair of support frames (18) are fixedly connected to the bottom of the screw extruder (1), and a feed assembly is provided at the top of the screw extruder (1).

2. A PET decorative film blowing extrusion mechanism according to claim 1, characterized in that: The feeding assembly comprises a feeding hopper (2), the feeding hopper (2) is fixedly connected to the top of the screw extruder (1), a hot air blower (21) is fixedly connected to the side wall of the feeding hopper (2), an air guide frame (22) is fixedly connected to the inner side wall of the feeding hopper (2), the air guide frame (22) is connected to the hot air blower (21) through a pipeline, an air outlet (23) is provided at the bottom of the air guide frame (22), and a feeding port (24) is provided at the top of the feeding hopper (2).

3. A PET decorative film blowing extrusion mechanism according to claim 2, characterized in that: A second motor (3) is fixedly connected to the top of the feed hopper (2), a second rotating shaft (31) is fixedly connected to the output end of the second motor (3), and a plurality of stirring rods (32) are fixedly connected to the side wall of the second rotating shaft (31).

4. The PET decorative film blowing extrusion mechanism according to claim 1, characterized in that: A pair of fixed plates (4) are fixedly connected to the bottom of the screw extruder (1), a plurality of damping springs (41) are fixedly connected to the bottom of the fixed plates (4), and the damping springs (41) are fixedly connected to the top of the support frame (18).

5. The PET decorative film blowing extrusion mechanism according to claim 2, characterized in that: A protective cover (5) is fixedly connected to the bottom of the air guide frame (22), and the protective cover (5) is a mesh structure.

6. The PET decorative film blowing extrusion mechanism according to claim 3, characterized in that: A pair of scrapers (6) are fixedly connected to the side wall of the second rotating shaft (31), and the pair of scrapers (6) are symmetrically arranged, and the tops of the scrapers (6) are in contact with the protective cover (5).

7. The PET decorative film blowing extrusion mechanism according to claim 1, characterized in that: The side wall of the screw extruder (1) is fixedly connected with heat-insulating cotton (7).

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