Raw material heating device for silica gel protective film production

Abstract

The invention provides a raw material heating device for silica gel protective film production, which comprises a film extruder and a preheating kettle, the preheating kettle is communicated with the film extruder through a blanking pipe, a stirring shaft is movably arranged in the preheating kettle, two stirring blades are symmetrically fixed on the stirring shaft, and the film extruder and the preheating kettle are communicated through a blanking pipe. A first mounting shaft is fixed to the bottom of the stirring shaft, the first mounting shaft extends into the discharging pipe, a first auger blade is mounted on the first mounting shaft, a conveying box is arranged above the preheating kettle in a splayed shape, and a discharging rectangular pipe is arranged between the conveying box and the preheating kettle in a communicating mode; a second mounting shaft is movably arranged in the conveying box, a feeding hopper is mounted on the conveying box, and the problem that in the prior art, all raw materials are difficult to heat to a molten state within a short time only through a heating system in an extruder, and consequently the subsequent production quality of the silica gel protective film is affected is solved.

Description

Technical Field

[0001] The invention relates to the field of silicone protective films, and in particular to a raw material heating device for producing silicone protective films. Background Art

[0002] Silicone protective film is a screen protective film mainly used to protect electronic products. Now the mainstream silicone protective film is PET silicone screen protective film, which is suitable for mobile phones, computers and various screen display surface protection masks.

[0003] At present, the processing and production of CPP soft silicone protective film requires processes such as raw material melting and extrusion molding. The extrusion process is to mix the raw materials in a certain proportion and feed them into the hopper of the extruder. The heating system inside the extruder heats the raw materials to a molten state to make them fluid. The molten raw materials are pushed by the screw of the extruder and extruded into a film through the die. In this process, the rotation and forward movement of the screw, as well as the shape and size of the die, jointly determine the initial shape and thickness of the film.

[0004] Since the raw materials entering the extruder inevitably contain larger granular raw materials, it is difficult to heat all the raw materials to a molten state in a short period of time only through the heating system inside the extruder, which affects the subsequent production quality of the silicone protective film.

[0005] Therefore, it is necessary to provide a new raw material heating device for producing silicone protective film to solve the above technical problems. Summary of the invention

[0006] In order to solve the above technical problems, the present invention provides a raw material heating device for the production of silicone protective film, which solves the problem in the prior art that it is difficult to heat all raw materials to a molten state in a short time only by the heating system inside the extruder, thereby affecting the subsequent production quality of the silicone protective film.

[0007] The raw material heating device for producing a silicone protective film provided by the present invention comprises a film extruder and a preheating kettle, wherein the preheating kettle and the film extruder are connected through a feed pipe; A stirring shaft is movably arranged inside the preheating kettle, two stirring blades are symmetrically fixed on the stirring shaft, a first mounting shaft is fixed at the bottom of the stirring shaft, the first mounting shaft extends into the inside of the feeding pipe, and a first auger blade is installed on the first mounting shaft; A conveying box is arranged in an eight-shaped shape above the preheating kettle, and a discharge rectangular pipe is arranged between the conveying box and the preheating kettle.

[0008] In a preferred embodiment, a second mounting shaft is movably arranged inside the conveying box, a second auger blade is mounted on the second mounting shaft, and a feed hopper is mounted on the conveying box.

[0009] In a preferred embodiment, a rotating shaft is movably arranged at the top of the preheating kettle, the bottom of the rotating shaft is fixedly connected to the stirring shaft, a first motor is arranged at the top of the preheating kettle, and the output end of the first motor is connected to the rotating shaft through a coupling.

[0010] In a preferred embodiment, a main gear is mounted on the rotating shaft, and one end of the second mounting shaft away from the feed hopper extends out of the conveying box and is mounted with a sub-gear; Both of the two sub-gears are meshed with the main gear.

[0011] In a preferred embodiment, an adsorption roller ring is movably arranged inside the discharge rectangular pipe, a mounting rod is arranged inside the adsorption roller ring, the mounting rod is fixed at the inner wall of the discharge rectangular pipe, and a magnetic system is mounted on the mounting rod; A chip discharge port is formed on one side of the discharge rectangular pipe away from the magnetic system, a chip scraping plate is fixed on the inner wall of the discharge rectangular pipe, and the chip scraping plate is located above the chip discharge port.

[0012] In a preferred embodiment, two guide plates are fixed at the inner wall of the discharge rectangular pipe, and the two guide plates are located above the adsorption roller ring.

[0013] In a preferred embodiment, a scraping ring plate is arranged inside the preheating kettle, and the scraping ring plate is in contact with the inner wall of the preheating kettle; Two sliding rods are symmetrically fixed inside the preheating kettle, the bottoms of the two sliding rods are fixedly connected to the scraping ring plate, the tops of the two sliding rods penetrate through the preheating kettle and are connected to a lifting mechanism; The sliding rods are slidably connected to the preheating kettle.

[0014] In a preferred embodiment, the lifting mechanism includes a U-shaped seat and two lead screws, and the bottom of the U-shaped seat is fixedly connected to the top of the sliding rod; The bottoms of the two lead screws are movably connected to the preheating kettle, the tops of the two lead screws penetrate through the U-shaped seat and are fixed with stoppers.

[0015] In a preferred embodiment, two limit seats are symmetrically fixed at the top of the preheating kettle, a transmission shaft is movably arranged between the two limit seats, both ends of the transmission shaft extend out of the limit seats and are mounted with first bevel gears, and the transmission shaft is movably connected to the limit seats through bearings; Second bevel gears are installed on both of the two lead screws, and the two second bevel gears are respectively meshed with the two first bevel gears; The thread directions of the two lead screws are opposite.

[0016] In a preferred embodiment, a second motor is arranged on one side of the preheating kettle, a third bevel gear is installed at the output end of the second motor, a fourth bevel gear is installed on the transmission shaft, and the fourth bevel gear is meshed with the third bevel gear.

[0017] Advantages of the present invention: 1. By arranging the preheating kettle to preheat the raw materials before entering the film extruder, the problem in the prior art that it is difficult to heat all the raw materials to the molten state in a short time only through the heating system inside the extruder, thus affecting the subsequent production quality of the silica gel protective film, is solved; 2. When the raw material heating device is in use, start the first motor. Under the transmission of the main wheel and the two sub-gears, the second mounting shafts inside the two conveying boxes will rotate accordingly. At this time, the staff only needs to put the corresponding materials into the feeding hopper. Under the action of the second auger blade, the materials can be transported along the conveying box to the discharge rectangular pipe and finally fall into the preheating kettle, without the staff approaching the preheating kettle for feeding, improving the safety of the working environment; 3. When the materials enter the discharge rectangular pipe, under the action of the two guide plates, the materials will fall onto the surface of the adsorption roller ring at this time. Under the action of the magnetic system, the iron filings and impurities inside the raw materials will be adsorbed on the adsorption roller ring. As the adsorption roller ring rotates, when the iron filings move to the scraping plate, due to the poor magnetic force effect of the magnetic system at the scraping plate, the iron filings can be easily scraped off from the adsorption roller ring to the chip discharge port by the scraping plate. By further filtering the iron filings inside the raw materials, the production quality of the subsequent products can be further improved, and at the same time, the extruder is prevented from being contaminated; 4. Since the raw materials of the CPP silica gel protective film will have a certain viscosity after heating and will adhere to the inner wall of the preheating kettle after the production process is completed, when cleaning is required, the staff only needs to start the second motor. Under the transmission of the first bevel gear, the second bevel gear, the third bevel gear and the fourth bevel gear, the transmission shaft will be driven to rotate. When the U-shaped seat moves downward under the action of the two lead screws, the scraping ring plate will move downward along the preheating kettle. At this time, the scraping ring plate can scrape off the raw materials on the inner wall of the preheating kettle, reducing the subsequent cleaning difficulty for the workers; When the first motor starts, it drives the stirring shaft to rotate. At this time, the stirring blades can fully mix the raw materials, improving the mixing uniformity between the raw materials. At the same time, the heated and mixed raw materials will be driven along the discharge rectangular pipe by the first installation shaft and the first auger blade and enter the film extruder to complete the feeding. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 is a three-dimensional view of the main structure of the raw material heating device for producing silicone protective films provided by the present invention; Figure 2 is Figure 1 an enlarged schematic structural view of A shown in; Figure 3 is a plan view of the main structure of the raw material heating device for producing silicone protective films provided by the present invention Figure 1 ; Figure 4 is Figure 3 an enlarged schematic structural view of B shown in; Figure 5 is a plan view of the main structure of the raw material heating device for producing silicone protective films provided by the present invention Figure 2 ; Figure 6 is a plan view of the main structure of the raw material heating device for producing silicone protective films provided by the present invention Figure 3 .

[0019] Reference numerals in the figures: 1. Film extruder; 2. Preheating kettle; 3. Feeding pipe; 4. Stirring shaft; 5. Stirring blades; 6. First installation shaft; 7. First auger blade; 8. Conveyor box; 9. Discharge rectangular pipe; 10. Second installation shaft; 11. Second auger blade; 12. Feed hopper; 13. Rotating shaft; 14. First motor; 15. Main gear; 16. Sub-gear; 17. Adsorption roller ring; 18. Installation rod; 19. Magnetic system; 20. Chip discharge port; 21. Chip scraping plate; 22. Guide plate; 23. Scraping ring plate; 24. Slide bar; 25. C-shaped seat; 26. Screw rod; 27. Block; 28. Limit seat; 29. Transmission shaft; 30. First bevel gear; 31. Second bevel gear; 32. Second motor; 33. Third bevel gear; 34. Third bevel gear. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0020] The present invention will be further described below in conjunction with the drawings and embodiments.

[0021] Please refer to Figure 1 , Figure 2 , Figure 3 , Figure 4 , Figure 5 and Figure 6 wherein Figure 1A three-dimensional view of the main structure of the raw material heating device for producing the silicone protective film provided by the present invention; Figure 2 for Figure 1 A schematic diagram of the enlarged structure of shown; Figure 3 The main structure of the raw material heating device for producing the silicone protective film provided by the present invention is a plan view Figure 1 ; Figure 4 for Figure 3 A schematic diagram of the enlarged structure of B shown; Figure 5 The main structure of the raw material heating device for producing the silicone protective film provided by the present invention is a plan view Figure 2 ; Figure 6 The main structure of the raw material heating device for producing the silicone protective film provided by the present invention is a plan view Figure 3 .

[0022] In the specific implementation process, Figure 1-Figure 6 As shown, it includes a film extruder 1 and a preheating kettle 2. The preheating kettle 2 specifically adopts a jacketed electric heating reactor. The main structural feature of the jacketed electric heating reactor is that the reactor body is divided into two layers, an inner layer and an outer layer, and a cavity is formed in the interlayer. The electric heating rod is inserted into the cavity and the heat transfer oil is injected. When the electric heating rod is working, the heat transfer oil absorbs heat and heats up. Since the jacket is closed, the heat transfer oil will squeeze the inner cylinder during the process of thermal expansion and contraction, thereby increasing the temperature of the inner cylinder. In order to prevent damage to the reactor due to thermal expansion and contraction, an expansion tank is also provided in the jacket for storing excess heat transfer oil. Since its specific working principle is an existing mature technology, it will not be described in detail here.

[0023] The preheating kettle 2 is connected to the film extruder 1 through a discharge pipe 3. A stirring shaft 4 is movably arranged inside the preheating kettle 2. Two stirring blades 5 are symmetrically fixed on the stirring shaft 4. A first mounting shaft 6 is fixed to the bottom of the stirring shaft 4. The first mounting shaft 6 extends into the discharge pipe 3, and a first auger blade 7 is installed on the first mounting shaft 6. When the first motor 14 is started, the stirring shaft 4 will be driven to rotate. At this time, the stirring blade 5 can fully mix the raw materials to improve the mixing uniformity between the raw materials. At the same time, the heated and mixed raw materials will be driven along the discharge rectangular tube 9 into the film extruder 1 to complete the loading under the action of the first mounting shaft 6 and the first auger blade 7.

[0024] Above the preheating kettle 2, a delivery box 8 is arranged in a V shape. A discharge rectangular pipe 9 is connected between the delivery box 8 and the preheating kettle 2. Inside the delivery box 8, a second mounting shaft 10 is movably arranged. A second auger blade 11 is mounted on the second mounting shaft 10. A feed hopper 12 is mounted on the delivery box 8. Inside the discharge rectangular pipe 9, an adsorption roller ring 17 is movably arranged. Inside the adsorption roller ring 17, a mounting rod 18 is arranged. The mounting rod 18 is fixed to the inner wall of the discharge rectangular pipe 9. A magnetic system 19 is mounted on the mounting rod 18. On one side of the discharge rectangular pipe 9 away from the magnetic system 19, a chip discharge port 20 is opened. A chip scraping plate 21 is fixed to the inner wall of the discharge rectangular pipe 9. The chip scraping plate 21 is located above the chip discharge port 20. Two guide plates 22 are fixed to the inner wall of the discharge rectangular pipe 9. The two guide plates 22 are located above the adsorption roller ring 17. When the material enters the inside of the discharge rectangular pipe 9, under the action of the two guide plates 22, the material will fall onto the surface of the adsorption roller ring 17 at this time. Under the action of the magnetic system 19, the iron filings and impurities inside the material will be adsorbed on the adsorption roller ring 17. As the adsorption roller ring 17 rotates, when the iron filings move to the chip scraping plate 21, due to the poor magnetic force effect of the magnetic system 19 at the chip scraping plate 21, under the action of the chip scraping plate 21, the iron filings can be easily scraped off from the adsorption roller ring 17 to the chip discharge port 20 at this time.

[0025] A rotating shaft 13 is movably arranged at the top of the preheating kettle 2. The bottom of the rotating shaft 13 is fixedly connected to the stirring shaft 4. A first motor 14 is arranged at the top of the preheating kettle 2. The output end of the first motor 14 is connected to the rotating shaft 13 through a coupling. A main gear 15 is mounted on the rotating shaft 13. One end of the second mounting shaft 10 away from the feed hopper 12 extends out of the delivery box 8 and is mounted with a sub-gear 16. Both sub-gears 16 are meshed with the main gear 15. When this raw material heating device is in use, the first motor 14 is started to drive the rotating shaft 13 to rotate. Under the driving action of the main gear 15 and the two sub-gears 16, the second mounting shafts 10 inside the two delivery boxes 8 both rotate accordingly. At this time, the staff only needs to put the corresponding material into the feed hopper 12. Under the action of the second auger blade 11, the material will be transported along the delivery box 8 to the discharge rectangular pipe 9 and finally fall into the preheating kettle 2.

[0026] A scraping ring plate 23 is arranged inside the preheating kettle 2. The scraping ring plate 23 is in contact with the inner wall of the preheating kettle 2. Two sliding rods 24 are symmetrically fixed inside the preheating kettle 2. The bottoms of the two sliding rods 24 are fixedly connected to the scraping ring plate 23. The tops of the two sliding rods 24 penetrate through the preheating kettle 2 and are connected with a lifting mechanism. The sliding rods 24 are slidably connected to the preheating kettle 2. When the U-shaped seat 25 moves downward, the scraping ring plate 23 will move downward along the preheating kettle 2 accordingly. At this time, the scraping ring plate 23 can scrape off the raw materials on the inner wall of the preheating kettle 2.

[0027] The lifting mechanism includes a U-shaped seat 25 and two lead screws 26. The bottom of the U-shaped seat 25 is fixedly connected to the top of the slide bar 24. The bottoms of the two lead screws 26 are movably connected to the preheating kettle 2. The tops of the two lead screws 26 penetrate through the U-shaped seat 25 and are fixed with stoppers 27. Two limit seats 28 are symmetrically fixed to the top of the preheating kettle 2. A transmission shaft 29 is movably arranged between the two limit seats 28. Both ends of the transmission shaft 29 extend out of the limit seats 28 and are equipped with first bevel gears 30. The transmission shaft 29 is movably connected to the limit seats 28 through bearings. Second bevel gears 31 are installed on both lead screws 26. The two second bevel gears 31 are respectively engaged with the two first bevel gears 30. The thread directions of the two lead screws 26 are opposite. A second motor 32 is arranged on one side of the preheating kettle 2. The output end of the second motor 32 is equipped with a third bevel gear 33. A fourth bevel gear 34 is installed on the transmission shaft 29. The fourth bevel gear 34 is engaged with the third bevel gear 33. Since the raw materials of the CPP silicone protective film will have a certain viscosity after heating and will adhere to the inner wall of the preheating kettle 2 after the production process is completed, when cleaning is required, the staff only needs to start the second motor 32. Under the driving action of the first bevel gear 30, the second bevel gear 31, the third bevel gear 33 and the fourth bevel gear 34, the transmission shaft 29 will be driven to rotate. At this time, the two lead screws 26 rotate in opposite directions at the same time, causing the U-shaped seat 25 to move downward along the direction of the slide bar 24.

[0028] The working principle of the present invention: When the raw material heating device is in use, start the first motor 14 to drive the rotating shaft 13 to rotate. Under the driving action of the main gear 15 and the two sub-gears 16, the second mounting shafts 10 inside the two conveying boxes 8 will all rotate accordingly. At this time, the staff only needs to put the corresponding materials into the feeding hopper 12. Under the action of the second auger blade 11, the materials will be transported along the conveying box 8 to the discharge rectangular pipe 9 and finally fall into the preheating kettle 2. When the materials enter the discharge rectangular pipe 9, under the action of the two guide plates 22, the materials will fall onto the surface of the adsorption roller ring 17 at this time. Under the action of the magnetic system 19, the iron filings and impurities inside the materials will be adsorbed on the adsorption roller ring 17. As the adsorption roller ring 17 rotates, when the iron filings move to the chip scraping plate 21, since the magnetic force effect of the magnetic system 19 at the chip scraping plate 21 is poor, under the action of the chip scraping plate 21, the iron filings can be easily scraped off from the adsorption roller ring 17 to the chip discharge port 20 at this time. Since the raw materials of the CPP silicone protective film will have a certain viscosity after heating and will adhere to the inner wall of the preheating kettle 2 after the production process is completed, when cleaning is required, the staff only needs to start the second motor 32. Driven by the first bevel gear 30, the second bevel gear 31, the third bevel gear 33 and the fourth bevel gear 34, the transmission shaft 29 will be driven to rotate. At this time, the two lead screws 26 rotate in opposite directions at the same time, causing the U-shaped seat 25 to move downward along the direction of the slide bar 24. Therefore, when the U-shaped seat 25 moves downward, the scraping ring plate 23 will move downward along the preheating kettle 2. At this time, the scraping ring plate 23 can scrape off the raw materials on the inner wall of the preheating kettle 2; When the first motor 14 is started, it will drive the stirring shaft 4 to rotate. At this time, the stirring blades 5 can fully mix the raw materials, improve the mixing uniformity of the raw materials, and at the same time, the heated and mixed raw materials will be driven along the discharge rectangular pipe 9 under the action of the first mounting shaft 6 and the first auger blade 7 and enter the film extruder 1 to complete the feeding.

[0029] The circuits and controls involved in the present invention are all prior arts and will not be elaborated here.

[0030] The above are only the embodiments of the present invention and do not limit the patent scope of the present invention. Any equivalent structure or equivalent process transformation made by using the content of the specification and drawings of the present invention, or directly or indirectly applied in other related technical fields, shall be equally included in the patent protection scope of the present invention.

Claims

1. A raw material heating device for producing silicone protective film, comprising a film extruder (1) and a preheating kettle (2), characterized in that: The preheating kettle (2) is communicated with the film extruder (1) through a feeding pipe (3); A stirring shaft (4) is movably arranged inside the preheating kettle (2). Two stirring blades (5) are symmetrically fixed on the stirring shaft (4). A first mounting shaft (6) is fixed at the bottom of the stirring shaft (4). The first mounting shaft (6) extends into the feeding pipe (3), and a first auger blade (7) is mounted on the first mounting shaft (6); A conveying box (8) is arranged above the preheating kettle (2) in a shape of an inverted V. A discharge rectangular pipe (9) is arranged in a communicating way between the conveying box (8) and the preheating kettle (2).

2. The raw material heating device for producing silicone protective film according to claim 1, characterized in that: A second mounting shaft (10) is movably arranged inside the conveying box (8). A second auger blade (11) is mounted on the second mounting shaft (10). A feeding hopper (12) is mounted on the conveying box (8).

3. The raw material heating device for producing silicone protective film according to claim 2, characterized in that: A rotating shaft (13) is movably arranged at the top of the preheating kettle (2). The bottom of the rotating shaft (13) is fixedly connected with the stirring shaft (4). A first motor (14) is arranged at the top of the preheating kettle (2). The output end of the first motor (14) is connected with the rotating shaft (13) through a coupling; 4. The raw material heating device for producing silicone protective film according to claim 3, characterized in that: A main gear (15) is mounted on the rotating shaft (13). One end of the second mounting shaft (10) far away from the feeding hopper (12) extends out of the conveying box (8) and is provided with a sub-gear (16); Both of the two sub-gears (16) are meshed with the main gear (15).

5. The raw material heating device for producing silicone protective film according to claim 4, characterized in that: An adsorption roller ring (17) is movably arranged inside the discharge rectangular pipe (9). A mounting rod (18) is arranged inside the adsorption roller ring (17). The mounting rod (18) is fixed on the inner wall of the discharge rectangular pipe (9). A magnetic system (19) is mounted on the mounting rod (18); A chip discharge port (20) is arranged on one side of the discharge rectangular pipe (9) far away from the magnetic system (19). A chip scraping plate (21) is fixed on the inner wall of the discharge rectangular pipe (9). The chip scraping plate (21) is located above the chip discharge port (20).

6. The raw material heating device for producing silicone protective film according to claim 5, characterized in that: Two guide plates (22) are fixed on the inner wall of the discharge rectangular pipe (9). The two guide plates (22) are located above the adsorption roller ring (17).

7. The raw material heating device for producing silicone protective film according to claim 6, characterized in that: A scraping ring plate (23) is arranged inside the preheating kettle (2). The scraping ring plate (23) is in contact with the inner wall of the preheating kettle (2); Two sliding rods (24) are symmetrically fixed inside the preheating kettle (2). The bottoms of the two sliding rods (24) are fixedly connected with the scraping ring plate (23). The tops of the two sliding rods (24) penetrate through the preheating kettle (2) and are connected with a lifting mechanism; The sliding rods (24) are slidably connected with the preheating kettle (2).

8. The raw material heating device for producing silicone protective film according to claim 7, characterized in that: The lifting mechanism comprises a U-shaped seat (25) and two lead screws (26). The bottom of the U-shaped seat (25) is fixedly connected with the tops of the sliding rods (24); The bottoms of the two lead screws (26) are movably connected with the preheating kettle (2). The tops of the two lead screws (26) penetrate through the U-shaped seat (25) and are fixed with stoppers (27).

9. The raw material heating device for producing silicone protective film according to claim 8, characterized in that: Two limit seats (28) are symmetrically fixed on the top of the preheating kettle (2), a transmission shaft (29) is movably arranged between the two limit seats (28), both ends of the transmission shaft (29) extend out of the limit seats (28) and are installed with a first bevel gear (30), and the transmission shaft (29) is movably connected to the limit seats (28) via a bearing; The two screw rods (26) are each mounted with a second bevel gear (31), and the two second bevel gears (31) are respectively meshed with the two first bevel gears (30); The threads on the two screw rods (26) are in opposite directions.

10. The raw material heating device for producing silicone protective film according to claim 9, characterized in that: A second motor (32) is provided on one side of the preheating kettle (2), a third bevel gear (33) is mounted on the output end of the second motor (32), a fourth bevel gear (34) is mounted on the transmission shaft (29), and the fourth bevel gear (34) is meshed with the third bevel gear (33).

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