A plastic sheet calendering apparatus

Abstract

The application discloses a plastic sheet calendering equipment, which comprises a fixed support, an upper fixed extrusion roller and a lower movable extrusion roller rotatably connected to one side of the fixed support and driven by motors respectively, and an extension cylinder fixedly connected to the surface of the fixed support, and belongs to the technical field of plastic sheet processing.

Description

Technical Field

[0001] This invention relates to the field of plastic sheet processing technology, specifically to a plastic sheet calendering equipment. Background Technology

[0002] With the widespread use of plastic products, there are more and more types of plastic production and processing equipment, including material transportation, screening, plasticizing, traction, embossing and other steps. Among them, the calender is an important piece of equipment for plastic processing. It mainly passes the plasticized thermoplastic through a series of horizontal rollers rotating in opposite directions. The plastic is squeezed and stretched into a thin sheet product with a certain thickness and width and a smooth surface.

[0003] According to patent number CN204354477U, a calendering device with adjustable thickness for plastic sheets has poor edge treatment effect during use, which easily leads to a large difference in thickness between the edge and the middle. In this case, the edge needs to be cut to a wider size to ensure the yield of the product. Summary of the Invention

[0004] To address the shortcomings of existing technologies, this invention provides a plastic sheet calendering device that solves the aforementioned problems.

[0005] To achieve the above objectives, the present invention is implemented through the following technical solution: a plastic sheet calendering equipment, including a fixed support, an upper fixed extrusion roller and a lower movable extrusion roller respectively driven by a motor are rotatably connected to one side of the fixed support, a telescopic cylinder is fixedly connected to the surface of the fixed support, and an edge processing mechanism is fixedly connected to one end of the telescopic cylinder.

[0006] The edge processing mechanism includes a collar fixed to one side of a telescopic cylinder. The collar is fitted onto the surface of an upper fixed extrusion roller. The inner cavity of the upper fixed extrusion roller has an inner groove adapted to the surface of the collar. A guide plate is movably connected to the bottom of the collar. The guide plate has a transverse guide slope on the side facing the upper fixed extrusion roller, and a vertical guide slope on the bottom of the guide plate. The surfaces of both the transverse and vertical guide slopes abut against the surface of the sheet. A fixing frame is fixedly connected to one side of the collar, and the inner cavity of the fixing frame is fixedly connected to... With extrusion rollers, during calendering, the heated sheet is extruded by an upper fixed extrusion roller and a lower movable extrusion roller. The lower movable extrusion roller is driven by a mechanism to move up and down on one side of the fixed support to adjust the distance between it and the lower movable extrusion roller. Both sides of the sheet are conveyed to one side of the guide plate, where it is extruded by the guide plate and the top collar. The sheet becomes thinner and wider at the same time. The edges are limited by the horizontal guide slope and the vertical guide slope. Then it is conveyed out and extruded by the extrusion rollers. Uneven edges are rolled a second time to ensure that the shape of the sheet edge position is normal.

[0007] As a further aspect of the present invention: the surface of the extrusion roller is provided with a conical protrusion. The extrusion roller is driven by a motor. The conical protrusion can be used to extrude the protrusions generated at the edge where the guide plate contacts the sheet. The protrusion in the middle can be extruded to make it flush with the rest of the area.

[0008] As a further aspect of the present invention: a plug-in plate is fixedly connected to the top of the guide plate, and the inner cavity of the collar is provided with a plug-in groove that engages with the surface of the plug-in plate. A limiting pin is threadedly connected to the surface of the collar to lock the plug-in plate. By engaging the plug-in plate with the limiting pin, guide plates of different sizes can be replaced to guide the surface of the sheet material. This method is applicable to the calendering of sheets of various sizes. By activating the telescopic cylinder, the collar can be moved within the inner groove to adjust the calendering range.

[0009] As a further embodiment of the present invention: a trimming mechanism for cutting and polishing the edge of the sheet is fixedly connected to one side of the collar. The trimming mechanism includes a drive mechanism fixed above the collar. The output end of the drive mechanism drives a connecting plate that moves up, down, left, and right. A cutting wheel driven by a motor is rotatably connected to one side of the connecting plate. The drive mechanism drives the connecting plate to move, thereby causing the cutting wheel to adjust its position to cut the edge of the sheet.

[0010] As a further aspect of the present invention: a water supply pipe is fixedly connected to the surface of the connecting plate, the water supply pipe is connected to an external water source, and the surface of the water supply pipe is provided with atomizing spray holes facing the surface of the cutting wheel. Atomized water vapor is sprayed onto the cutting wheel through the atomizing spray holes, which can cool the cutting wheel and prevent the high-speed friction between the cutting wheel and the sheet from generating heat that would cause the sheet to melt, resulting in uneven cut edges.

[0011] As a further aspect of the present invention: a double-rod drive cylinder is fixedly connected to one side of the connecting plate, and a drive motor is fixedly connected to both ends of the piston rod of the double-rod drive cylinder. A grinding wheel is fixedly connected to one end of the output shaft of the drive motor. The double-rod drive cylinder drives the drive motor to move, adjusting the distance between the two grinding wheels. Then, the drive motor drives the grinding wheels to rotate to polish the edge of the sheet. This method can be adapted to the processing of sheets of various widths. Furthermore, the water vapor adhering to the surface of the sheet during cutting can play a cooling role, preventing the high temperature generated during polishing from causing the sheet to melt.

[0012] As a further aspect of the present invention: the surface of the grinding wheel is provided with stepped grooves, which respectively contact the top and side of the sheet. The surface of the stepped groove that contacts the top of the sheet is an inclined surface. The design of the stepped groove allows for more thorough contact with the sheet, resulting in a better polishing effect. Furthermore, the inclined surface can form a chamfer, preventing over-polishing of the sheet.

[0013] As a further aspect of the present invention: two edge processing mechanisms and two trimming mechanisms are provided, and they are symmetrically distributed.

[0014] During calendering, the heated sheet is squeezed by an upper fixed extrusion roller and a lower movable extrusion roller. The lower movable extrusion roller is driven by a mechanism to move up and down on one side of the fixed support to adjust the distance between it and the fixed roller. Both sides of the sheet are conveyed to one side of the guide plate. The interlocking plate is engaged by a limiting pin. Different sizes of guide plates can be replaced to guide the surface of the sheet. This method is suitable for calendering sheets of various sizes. By activating the telescopic cylinder, the collar can be moved within the inner groove to adjust the calendering range. Under the pressure of the guide plate and the top collar, the sheet becomes thinner and wider at the same time. The edges are limited by the horizontal and vertical guide slopes. Then, it is conveyed out and squeezed by the extrusion rollers. The conical protrusions can produce pressure at the edges where the guide plate contacts the sheet. The protrusions are squeezed to make the central protrusion flush with the rest of the sheet. Uneven edges are then rolled a second time to ensure the sheet edges are properly shaped. Driven by a drive mechanism, the connecting plate moves, causing the cutting wheel to adjust its position and cut the sheet edges. Atomized water vapor is sprayed from the atomizing nozzles onto the cutting wheel to cool it down and prevent the sheet from melting due to high-speed friction between the cutting wheel and the sheet, which would result in uneven cut edges. Then, the grinding wheel is driven by a drive motor to polish the sheet edges. This process can accommodate sheets of various widths, and the water vapor adhering to the sheet surface during cutting helps to cool it down and prevent the high temperatures generated during polishing from melting the sheet.

[0015] Compared with the prior art, the present invention has the following advantages:

[0016] 1. In this invention, the rolling range is adjusted by the movement of the collar within the inner groove. Under the pressure of the guide plate and the top collar, the sheet becomes thinner and wider at the same time. The edges are limited by the transverse guide slope and the vertical guide slope. Then, it is conveyed out and pressed by the extrusion roller. The conical protrusion can be used to press the protrusions generated at the edge where the guide plate contacts the sheet. The middle protrusion can be pressed to make it flush with the rest. Uneven edges are rolled a second time to ensure that the shape of the sheet edge position is normal.

[0017] 2. In this invention, the atomizing nozzle sprays atomized water vapor onto the cutting wheel, which cools the cutting wheel and prevents the high-speed friction between the cutting wheel and the sheet from generating heat that could melt the sheet and result in uneven cut edges. Then, the grinding wheel is driven by a drive motor to polish the edges of the sheet. This invention can be used to process sheets of various widths. Furthermore, the water vapor adhering to the surface of the sheet during cutting helps to cool it down and prevents the high temperature generated during grinding from melting the sheet. Attached Figure Description

[0018] Figure 1 This is a partial structural cross-sectional view of the present invention;

[0019] Figure 2 For the present invention Figure 1 A magnified view of a section at point A in the middle;

[0020] Figure 3 This is a schematic diagram of the structure of the fixed extrusion roller in this invention;

[0021] Figure 4 This is a schematic diagram of the structure of the extrusion roller of the present invention;

[0022] Figure 5 This is a side view of the structure of the collar of the present invention;

[0023] Figure 6 This is a schematic diagram of the structure of the guide plate of the present invention;

[0024] Figure 7 This is a side view of the structure of the connecting plate of the present invention.

[0025] In the diagram: 1. Fixed bracket; 2. Upper fixed extrusion roller; 3. Lower movable extrusion roller; 4. Collar; 5. Guide plate; 6. Inner groove; 7. Telescopic cylinder; 8. Fixed frame; 9. Extrusion roller; 10. Conical protrusion; 11. Drive mechanism; 12. Cutting wheel; 13. Double-rod drive cylinder; 14. Grinding wheel; 15. Step groove; 16. Horizontal guide slope; 17. Vertical guide slope; 18. Insertion plate; 19. Limit pin; 20. Drive motor; 21. Water supply pipe; 22. Atomizing nozzle; 23. Connecting plate. Detailed Implementation

[0026] To further illustrate the technical means and effects of the present invention in achieving its intended purpose, the following detailed description of the specific implementation methods, structures, features, and effects of the present invention, in conjunction with the accompanying drawings and preferred embodiments, is provided below.

[0027] Please see Figure 1-7The present invention provides a technical solution: a plastic sheet calendering equipment, including a fixed support 1, an upper fixed extrusion roller 2 and a lower movable extrusion roller 3 driven by a motor are rotatably connected to one side of the fixed support 1, a telescopic cylinder 7 is fixedly connected to the surface of the fixed support 1, and an edge processing mechanism is fixedly connected to one end of the telescopic cylinder 7.

[0028] The edge processing mechanism includes a collar 4 fixed to one side of the telescopic cylinder 7. The collar 4 is sleeved on the surface of the upper fixed extrusion roller 2. The inner cavity of the upper fixed extrusion roller 2 has an inner groove 6 that matches the surface of the collar 4. A guide plate 5 is movably connected to the bottom of the collar 4. The guide plate 5 has a transverse guide slope 16 on the side facing the upper fixed extrusion roller 2, and a vertical guide slope 17 on the bottom of the guide plate 5. The surfaces of the transverse guide slope 16 and the vertical guide slope 17 both abut against the surface of the sheet. A fixing frame 8 is fixedly connected to one side of the collar 4. An extrusion roller is fixedly connected to the inner cavity of the fixing frame 8. During calendering, the heated sheet is squeezed by the upper fixed extrusion roller 2 and the lower movable extrusion roller 3. The lower movable extrusion roller 3 is driven by a mechanism to move up and down on one side of the fixed support 1 to adjust the distance between it and the lower movable extrusion roller 3. The two sides of the sheet are conveyed to one side of the guide plate 5 and squeezed by the guide plate 5 and the top collar 4. The sheet becomes thinner and wider at the same time. The edges are limited by the transverse guide slope 16 and the vertical guide slope 17. Then it is conveyed out and squeezed by the extrusion roller 9. The uneven edges are rolled a second time to ensure that the shape of the edge position of the sheet is normal.

[0029] The surface of the extrusion roller 9 is provided with a conical protrusion 10. The extrusion roller 9 is driven by a motor. The conical protrusion 10 can extrude the protrusion generated at the edge where the guide plate 5 contacts the sheet. The middle protrusion can be extruded to make it flush with the rest of the area.

[0030] The top of the guide plate 5 is fixedly connected to the plug plate 18. The inner cavity of the collar 4 is provided with a plug groove that engages with the surface of the plug plate 18. The surface of the collar 4 is threaded with a limiting pin 19 for locking the plug plate 18. By engaging the plug plate 18 with the limiting pin 19, guide plates 5 of different sizes can be replaced to guide the surface of the sheet. This method is suitable for calendering sheets of various sizes. By activating the telescopic cylinder 7, the collar 4 can be moved within the inner groove 6 to adjust the calendering range.

[0031] A trimming mechanism for cutting and polishing the edge of the sheet is fixedly connected to one side of the collar 4. The trimming mechanism includes a drive mechanism 11 fixed above the collar 4. The output end of the drive mechanism 11 drives a connecting plate 23 that moves up, down, left, and right. A cutting wheel 12 driven by a motor is rotatably connected to one side of the connecting plate 23. The drive mechanism 11 drives the connecting plate 23 to move, thereby causing the cutting wheel 12 to adjust its position and cut the edge of the sheet.

[0032] A water supply pipe 21 is fixedly connected to the surface of the connecting plate 23. The water supply pipe 21 is connected to an external water source. The surface of the water supply pipe 21 is provided with atomizing nozzles 22 facing the surface of the cutting wheel 12. Atomized water vapor is sprayed onto the cutting wheel 12 through the atomizing nozzles 22, which can cool the cutting wheel 12 and prevent the high-speed friction between the cutting wheel 12 and the sheet from generating heat that would cause the sheet to melt, resulting in uneven cut edges.

[0033] A double-rod drive cylinder 13 is fixedly connected to one side of the connecting plate 23. Both ends of the piston rod of the double-rod drive cylinder 13 are fixedly connected to drive motors 20. One end of the output shaft of the drive motor 20 is fixedly connected to a grinding wheel 14. The double-rod drive cylinder 13 drives the drive motor 20 to move, adjusting the distance between the two grinding wheels 14. Then, the drive motor 20 drives the grinding wheels 14 to rotate to polish the edge of the sheet. It can be adapted to the processing of sheets of various widths. In addition, the water vapor adhering to the surface of the sheet during cutting can play a role in cooling, preventing the high temperature generated by grinding from causing the sheet to melt.

[0034] The surface of the grinding wheel 14 is provided with stepped grooves 15, which contact the top and side of the sheet respectively. The surface of the stepped groove 15 that contacts the top of the sheet is an inclined surface. The design of the stepped groove 15 allows for more thorough contact with the sheet, resulting in a better polishing effect. Furthermore, the inclined surface can form a chamfer to prevent over-polishing of the sheet.

[0035] There are two edge processing mechanisms and two trimming mechanisms, which are symmetrically distributed.

[0036] During calendering, the heated sheet is squeezed by the upper fixed extrusion roller 2 and the lower movable extrusion roller 3. The lower movable extrusion roller 3 is driven by a mechanism to move up and down on one side of the fixed bracket 1 to adjust the distance between itself and the lower movable extrusion roller 3. The two sides of the sheet are conveyed to one side of the guide plate 5. The guide plate 18 is engaged by the limiting pin 19. Different sizes of guide plates 5 can be replaced to guide the surface of the sheet. This method is suitable for calendering sheets of various sizes. By activating the telescopic cylinder 7, the collar 4 can be moved within the inner groove 6 to adjust the calendering range. Under the pressure of the guide plate 5 and the top collar 4, the sheet becomes thinner and wider at the same time. The edges are limited by the transverse guide slope 16 and the vertical guide slope 17. Then, it is conveyed out and squeezed by the extrusion roller 9. The conical protrusion 10 can control the edge of the guide plate 5 in contact with the sheet. The protrusions at the edges are squeezed to make the middle protrusion flush with the rest of the sheet. Uneven edges are then rolled a second time to ensure the normal shape of the sheet edge. Driven by the drive mechanism 11, the connecting plate 23 moves, which drives the cutting wheel 12 to adjust its position and cut the edge of the sheet. The atomizing nozzle 22 sprays atomized water vapor onto the cutting wheel 12, which can cool the cutting wheel 12 and prevent the high-speed friction between the cutting wheel 12 and the sheet from generating heat that would cause the sheet to melt and result in uneven cut edges. Then, the drive motor 20 drives the grinding wheel 14 to rotate and polish the edge of the sheet. This method can be used to process sheets of various widths. The water vapor adhering to the surface of the sheet during cutting can also cool it down and prevent the high temperature generated during polishing from causing the sheet to melt.

[0037] The above description is merely a preferred embodiment of the present invention and is not intended to limit the present invention in any way. Although the present invention has been disclosed above with reference to preferred embodiments, it is not intended to limit the present invention. Any person skilled in the art can make some modifications or alterations to the above-disclosed technical content to create equivalent embodiments without departing from the scope of the present invention. Any simple modifications, equivalent changes and alterations made to the above embodiments based on the technical essence of the present invention without departing from the scope of the present invention shall still fall within the scope of the present invention.

Claims

1. A plastic sheet calendering device comprising a fixed support (1), one side of which is rotatably connected with an upper fixed extrusion roller (2) and a lower movable extrusion roller (3) respectively driven by a motor, characterized in that: The surface of the fixing support (1) is fixedly connected with a telescopic air cylinder (7), one end of the telescopic air cylinder (7) is fixedly connected with an edge processing mechanism; The edge processing mechanism comprises a sleeve ring (4) fixed on one side of the telescopic air cylinder (7), the sleeve ring (4) is sleeved on the surface of the upper fixed extrusion roller (2), the inner cavity of the upper fixed extrusion roller (2) is provided with an inner groove (6) matched with the surface of the sleeve ring (4), the bottom of the sleeve ring (4) is movably connected with a guide plate (5), one side of the guide plate (5) facing the upper fixed extrusion roller (2) is provided with a transverse guide inclined surface (16), the bottom of the guide plate (5) is provided with a vertical guide inclined surface (17), the surfaces of the transverse guide inclined surface (16) and the vertical guide inclined surface (17) are in abutment with the surface of the sheet, one side of the sleeve ring (4) is fixedly connected with a fixing frame (8), the inner cavity of the fixing frame (8) is fixedly connected with an extrusion roller (9).

2. A plastic sheet calendering apparatus according to claim 1, wherein: The surface of the extrusion roller (9) is provided with a tapered protrusion (10), and the extrusion roller (9) is driven by a motor.

3. A plastic sheet calendering apparatus as defined in claim 1, wherein: The top of the guide plate (5) is fixedly connected with a plug-in plate (18), the inner cavity of the sleeve ring (4) is provided with a plug-in groove matched with the surface of the plug-in plate (18), and the surface of the sleeve ring (4) is threadedly connected with a limiting pin (19) for locking the plug-in plate (18).

4. A plastic sheet calendering apparatus as defined in claim 1, wherein: One side of the sleeve ring (4) is fixedly connected with a trimming mechanism for cutting and polishing the edge of the sheet, the trimming mechanism comprises a driving mechanism (11) fixed above the sleeve ring (4), the output end of the driving mechanism (11) drives a connecting plate (23) moving up and down and left and right, one side of the connecting plate (23) is rotatably connected with a cutting wheel (12) driven by a motor.

5. A plastic sheet calendering apparatus as claimed in claim 4, wherein: The surface of the connecting plate (23) is fixedly connected with a water conveying pipeline (21), the water conveying pipeline (21) is in communication with an external water source, and the surface of the water conveying pipeline (21) is provided with an atomizing spray hole (22) facing the surface of the cutting wheel (12).

6. A plastic sheet calendering apparatus according to claim 5, wherein: One side of the connecting plate (23) is fixedly connected with a double-rod driving air cylinder (13), the two ends of the piston rod of the double-rod driving air cylinder (13) are fixedly connected with driving motors (20), one end of the output shaft of the driving motor (20) is fixedly connected with a grinding wheel (14), and the driving motor (20) is moved by the double-rod driving air cylinder (13).

7. A plastic sheet calendering apparatus as defined in claim 6, wherein: The surface of the grinding wheel (14) is provided with a stepped groove (15), the stepped groove (15) respectively contacts the top and the side edge of the sheet, and the surface of the stepped groove (15) contacting the top of the sheet is an inclined surface.

8. A plastic sheet calendering apparatus as defined in claim 1, wherein: The edge processing mechanism and the trimming mechanism are both provided with two and are symmetrically distributed.

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