A device for rolling and cooling plastic melt into sheets with adjustable thickness

Abstract

This invention discloses a plastic melt rolling and cooling sheet forming device with adjustable thickness, comprising a frame on which two symmetrical strip-shaped plates are mounted. A guide roller and a fixed roller are rotatably mounted between the rear and middle portions of the two strip-shaped plates, respectively. Symmetrical rectangular through holes are opened at the front of the two strip-shaped plates. A sliding groove is opened on the inner side of each rectangular through hole, and a slider is slidably mounted within each groove. A movable plate is installed within each rectangular through hole, fixed to the slider. A movable roller is rotatably mounted between the two movable plates. This invention uses a first motor to drive a screw to rotate, controlling the movement and adjustment of the movable plates and movable roller, thereby adjusting the gap between the fixed roller and the movable roller, and thus controlling the sheet thickness of the plastic melt. By setting a spiral multi-cooling channel structure inside the guide roller, fixed roller, and movable roller, the cooling medium can flow uniformly within the rollers, effectively removing heat from the plastic melt and achieving rapid cooling.

Description

Technical Field

[0001] This utility model relates to the field of automotive interior parts manufacturing technology, specifically to a plastic melt rolling and cooling sheet forming device with adjustable thickness. Background Technology

[0002] In the automotive manufacturing industry, the production of interior components is a crucial link. As consumers' demands for automotive comfort and aesthetics continue to rise, the production technology of automotive interior components is also constantly advancing. Especially in the production of plastic interior components, such as dashboards, door panels, and center consoles, not only must basic functional requirements be met, but high standards must also be achieved in terms of appearance, texture, and durability.

[0003] In the production of plastic interior parts, it is usually necessary to first roll-cool the plastic melt into plastic sheets. Existing plastic melt rolling and cooling sheet forming equipment has a simple structure, mainly composed of pressure rollers, guide rollers, and a drive structure. The rollers have multiple axial straight cooling medium channels. The plastic melt passes between two pressure rollers and is rolled and cooled into sheets, and then guided to the next process by the guide rollers. However, in existing plastic melt rolling and cooling sheet forming equipment, the distance between the two pressure rollers is fixed and cannot be adjusted according to the thickness requirements of different products. Moreover, the cooling channels in the existing plastic melt rolling and cooling sheet forming equipment cannot allow the cooling medium to flow evenly within the rollers, and cannot fully remove the heat from the plastic melt. Utility Model Content

[0004] The purpose of this invention is to address the shortcomings of existing technologies by providing a plastic melt rolling and cooling sheet forming device with adjustable thickness, thereby solving the problems mentioned in the background art.

[0005] To achieve this objective, the present invention adopts the following technical solution:

[0006] A thickness-adjustable plastic melt rolling and cooling sheet forming device includes a frame on which two symmetrical strip-shaped plates are mounted. Guide rollers and fixed rollers are rotatably mounted between the rear and middle parts of the two strip-shaped plates, respectively. Symmetrical rectangular through holes are opened at the front of the two strip-shaped plates. Sliding grooves are opened on the inner side of each rectangular through hole, and sliders are slidably mounted in each sliding groove. Moving plates are provided in each rectangular through hole and fixed to the sliders. Moving rollers are rotatably mounted between the two moving plates. Screws are rotatably mounted on the inner side of each rectangular through hole of the two strip-shaped plates. Screw holes are provided on each moving plate and mate with the screws. A first reduction gearbox and a first motor are installed at the front end of each of the two strip-shaped plates. The input shaft of the first reduction gearbox is connected to the output shaft of the first motor, and the output shaft of the first reduction gearbox is connected to the screws.

[0007] As a preferred embodiment of the adjustable thickness plastic melt rolling and cooling sheet forming device, a rotating shaft is rotatably mounted on the outer side of each of the two strip-shaped vertical plates. Gears are mounted on the hollow shafts of the rotating shafts and the fixed roller, and the two gears mesh with each other. A first sprocket is mounted on the hollow shafts of the rotating shafts and the moving roller, and the two first sprockets are connected by a first chain. A pair of tensioners are arranged next to the first chain. The base of the tensioner is fixed on the strip-shaped vertical plate. A second sprocket is rotatably mounted on the output rod of the tensioner. The second sprocket is always pressed on the first chain. A second motor and a second reduction gearbox are mounted on the frame. The output shaft of the second motor is connected to the input shaft of the second reduction gearbox. A third sprocket is mounted on the output shaft of the second reduction gearbox and the hollow shaft of the fixed roller, and the two third sprockets are connected by a second chain.

[0008] As a preferred embodiment of a thickness-adjustable plastic melt rolling and cooling sheet forming device, the guide roller, fixed roller and moving roller have the same structure, each including a hollow drum, two hollow shafts and a cylinder. The two hollow shafts are respectively installed at both ends of the hollow drum and are connected to the hollow drum. The cylinder is installed inside the hollow drum, and multiple evenly distributed spiral grooves are provided on the outer side of the cylinder.

[0009] As a preferred embodiment of the plastic melt rolling and cooling sheet forming device with adjustable thickness, the rear ends of the two strip plates are inclined upwards, and the angle between the strip plates and the horizontal plane is 30 degrees to 45 degrees.

[0010] As a preferred embodiment of the plastic melt rolling and cooling sheet forming device with adjustable thickness, the sliding grooves inside the rectangular through holes of the screw and the strip plate are parallel to the strip plate.

[0011] As a preferred embodiment of a plastic melt rolling and cooling sheet forming device with adjustable thickness, the length of the moving plate is less than the length of the rectangular through hole on the strip plate.

[0012] As a preferred embodiment of a plastic melt rolling and cooling sheet forming device with adjustable thickness, the hollow roller and the two hollow shafts are all on the same axis.

[0013] As a preferred embodiment of a plastic melt rolling and cooling sheet forming device with adjustable thickness, the outer radius of the cylinder is equal to the inner radius of the hollow roller.

[0014] As a preferred embodiment of a plastic melt rolling and cooling sheet forming device with adjustable thickness, the length of the cylinder is less than the inner cavity length of the hollow drum, and the two ends of the cylinder do not contact the two ends of the inner cavity of the hollow drum.

[0015] As a preferred embodiment of a plastic melt rolling and cooling sheet forming device with adjustable thickness, rotary joints are installed on the hollow shafts at both ends of the guide roller, fixed roller, and moving roller.

[0016] The beneficial effects of this utility model are:

[0017] (1) The plastic melt rolling and cooling sheet forming device with adjustable thickness of this utility model can control the movement and adjustment of the moving plate and the moving roller by setting the first motor to drive the screw to rotate, thereby realizing the gap adjustment between the fixed roller and the moving roller, and thus controlling the sheet thickness of the plastic melt to meet the thickness requirements of different products.

[0018] (2) The plastic melt rolling and cooling sheet forming device with adjustable thickness of this utility model can achieve rapid cooling by setting a spiral multi-cooling channel structure inside the guide roller, fixed roller and moving roller. The cooling medium can flow evenly in the roller and fully remove the heat of the plastic melt. Attached Figure Description

[0019] To more clearly illustrate the technical solutions of the embodiments of this utility model, the drawings used in the embodiments of this utility model will be briefly described below. Obviously, the drawings described below are merely some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without any creative effort.

[0020] Figure 1 This is a schematic diagram of the overall structure of the adjustable thickness plastic melt rolling and cooling sheet forming device described in this utility model.

[0021] Figure 2 This is a schematic diagram of the control structure of the movable plate described in this utility model.

[0022] Figure 3 This is a schematic diagram of the external structure of the guide roller described in this utility model.

[0023] Figure 4 This is a schematic diagram of the internal structure of the guide roller described in this utility model.

[0024] Figure 5 This is a schematic diagram of the transmission structure of the fixed roller and the moving roller described in this utility model.

[0025] Figure 6 This is a schematic diagram of the driving structure of the fixed roller described in this utility model.

[0026] In the picture:

[0027] 1. Frame; 2. Strip plate; 3. Guide roller; 31. Hollow drum; 32. Hollow shaft; 33. Cylindrical column; 34. Spiral groove; 4. Fixed roller; 5. Moving roller; 6. Rotary joint; 7. Slider; 8. Moving plate; 9. Screw; 10. First gearbox; 11. First motor; 12. Rotating shaft; 13. Gear; 14. First sprocket; 15. First chain; 16. Tensioner; 17. Second sprocket; 18. Second motor; 19. Second gearbox; 20. Third sprocket; 21. Second chain. Detailed Implementation

[0028] The technical solution of this utility model will be further described below with reference to the accompanying drawings and specific embodiments.

[0029] The accompanying drawings are for illustrative purposes only and are schematic diagrams, not actual images. They should not be construed as limiting the scope of this patent. To better illustrate the embodiments of this utility model, some components in the drawings may be omitted, enlarged, or reduced, and do not represent the actual dimensions of the product. It is understandable to those skilled in the art that some well-known structures and their descriptions may be omitted in the drawings.

[0030] In the accompanying drawings of this utility model, the same or similar reference numerals correspond to the same or similar components. In the description of this utility model, it should be understood that if terms such as "upper," "lower," "left," "right," "inner," and "outer" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, they are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, the terms used to describe positional relationships in the drawings are only for illustrative purposes and should not be construed as limiting this patent. For those skilled in the art, the specific meaning of the above terms can be understood according to the specific circumstances.

[0031] In the description of this utility model, unless otherwise explicitly specified and limited, the term "connection" or similar designation indicating the connection relationship between components should be interpreted broadly. For example, it can refer to a fixed connection, a detachable connection, or an integral part; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium; it can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0032] like Figures 1 to 6As shown, this utility model provides a plastic melt rolling and cooling sheet forming device with adjustable thickness, including a frame 1. Two symmetrical strip plates 2 are installed on the frame 1. The rear ends of the two strip plates 2 are inclined upwards, with an angle of approximately 30 to 45 degrees with the horizontal plane. Guide rollers 3 and fixed rollers 4 are rotatably installed between the rear and middle parts of the two strip plates 2, respectively. The guide rollers 3 are used to guide the plastic melt after rolling and cooling to the next process.

[0033] Specifically, in this embodiment, the front of the two strip-shaped upright plates 2 are provided with symmetrical rectangular through holes. The inner side of each rectangular through hole is provided with a sliding groove, which is parallel to the strip-shaped upright plate 2. A slider 7 is slidably installed in each sliding groove. A movable plate 8 is provided in each rectangular through hole. The movable plate 8 is fixed to the slider 7. The length of the movable plate 8 is less than the length of the rectangular through hole on the strip-shaped upright plate 2. The position of the movable plate 8 in the rectangular through hole can be adjusted by sliding the slider 7. A movable roller 5 is rotatably installed between the two movable plates 8. The position of the movable roller 5 can be changed by adjusting the position of the movable plate 8, thereby realizing the adjustment of the gap between the fixed roller 4 and the movable roller 5, and thus controlling the sheet thickness of the plastic melt.

[0034] More specifically, in this embodiment, both movable plates 8 are provided with screw holes, and screws 9 are rotatably installed inside the rectangular through holes of the two strip-shaped upright plates 2. The screws 9 are arranged parallel to the strip-shaped upright plates 2 and cooperate with the screw holes on the movable plates 8. By rotating the screws 9, the movable plates 8 can be driven to move along the slide groove inside the rectangular through holes.

[0035] Preferably, a first reduction gearbox 10 and a first motor 11 are installed at the front ends of both strip plates 2. The input shaft of the first reduction gearbox 10 is connected to the output shaft of the first motor 11, and the output shaft of the first reduction gearbox 10 is connected to the screw 9. By controlling the rotation direction and speed of the first motor 11, the screw 9 can be driven to rotate, thereby adjusting the position of the moving plate 8 and the moving roller 5. The first reduction gearbox 10 is a worm gear reducer, which has a certain self-locking capability to prevent the moving plate 8 from moving downward due to gravity. The first motor 11 is a servo motor, which can precisely control the speed and number of revolutions of its output shaft, thereby allowing for more precise adjustment of the position of the moving plate 8 and the moving roller 5.

[0036] Preferably, the guide roller 3, fixed roller 4, and moving roller 5 have the same structure, each including a hollow roller 31, two hollow shafts 32, and a cylinder 33. The two hollow shafts 32 are respectively installed at both ends of the hollow roller 31 and are connected to the hollow roller 31. The hollow roller 31 and the two hollow shafts 32 are all on the same axis. The cylinder 33 is installed inside the hollow roller 31. The outer radius of the cylinder 33 is equal to the inner radius of the hollow roller 31. The length of the cylinder 33 is less than the inner cavity length of the hollow roller 31. The two ends of the cylinder 33 do not contact the two ends of the inner cavity of the hollow roller 31. The outer side of the cylinder 33 is provided with multiple evenly distributed spiral grooves 34. When the cooling medium flows in from the hollow shaft 32 at one end of the hollow roller 31, the cooling medium can flow evenly through all the spiral grooves 34 on the cylinder 33 and finally flow out from the hollow shaft 32 at the other end. By adopting a spiral multi-cooling channel structure, the cooling medium can flow evenly inside the roller, fully remove the heat of the plastic melt, and achieve rapid cooling.

[0037] More specifically, a second motor 18 and a second reduction gearbox 19 are installed on the frame 1. The output shaft of the second motor 18 is connected to the input shaft of the second reduction gearbox 19. A third sprocket 20 is installed on both the output shaft of the second reduction gearbox 19 and the hollow shaft 32 of the fixed roller 4. The two third sprockets 20 are connected by a second chain 21. The fixed roller 4 can be driven to rotate by the second motor 18.

[0038] A rotating shaft 12 is rotatably mounted on the outer side of each of the two strip-shaped vertical plates 2. Gears 13 are mounted on both the rotating shaft 12 and the hollow shaft 32 of the fixed roller 4, and the two gears 13 mesh with each other. When the fixed roller 4 rotates, it can drive the rotating shaft 12 to rotate, and the rotation directions of the fixed roller 4 and the rotating shaft 12 are opposite.

[0039] Both the rotating shaft 12 and the hollow shaft 32 of the moving roller 5 are equipped with first sprockets 14. The two first sprockets 14 are connected by a first chain 15. When the rotating shaft 12 rotates, it can drive the moving roller 5 to rotate. The rotating shaft 12 and the moving roller 5 rotate in the same direction, that is, the moving roller 5 and the fixed roller 4 rotate in opposite directions, thereby realizing the rolling of the plastic melt.

[0040] Preferably, a pair of tensioners 16 are provided next to the first chain 15. The base of the tensioner 16 is fixed on the strip plate 2. A second sprocket 17 is rotatably mounted on the output rod of the tensioner 16. The second sprocket 17 is always pressed on the first chain 15. Through the cooperation of the tensioner 16 and the second sprocket 17, the tension of the first chain 15 can be maintained, and the first chain 15 can be prevented from falling off due to the change of position of the moving roller 5, thus ensuring the stability of the transmission of the first chain 15.

[0041] Rotary joints 6 are installed on the hollow shafts 32 at both ends of the guide roller 3, fixed roller 4 and moving roller 5, for connecting the cooling medium circulation supply system to supply cooling medium into the spiral groove 34.

[0042] It should be stated that the above-described specific embodiments are merely preferred embodiments of this utility model and the technical principles employed. Those skilled in the art should understand that various modifications, equivalent substitutions, and variations can be made to this utility model. However, such variations, as long as they do not depart from the spirit of this utility model, should be within the protection scope of this utility model. Furthermore, some terminology used in this application specification and claims is not limiting, but merely for ease of description.

Claims

1. A device for rolling and cooling plastic melt into sheets with adjustable thickness, characterized in that, The system includes a frame (1), on which two symmetrical strip-shaped vertical plates (2) are mounted. Guide rollers (3) and fixed rollers (4) are rotatably mounted between the rear and middle parts of the two strip-shaped vertical plates (2), respectively. Symmetrical rectangular through holes are opened at the front of the two strip-shaped vertical plates (2). Sliding grooves are opened on the inner side of the two rectangular through holes, and sliders (7) are slidably installed in the sliding grooves. Moving plates (8) are set in the two rectangular through holes. The moving plates (8) are fixed to the sliders (7). A movable roller (5) is rotatably installed between the movable plates (8). A screw (9) is rotatably installed inside the rectangular through holes of the two strip plates (2). Both movable plates (8) are provided with screw holes, and the screw holes are matched with the screws (9). A first gearbox (10) and a first motor (11) are installed at the front end of the two strip plates (2). The input shaft of the first gearbox (10) is connected to the output shaft of the first motor (11), and the output shaft of the first gearbox (10) is connected to the screw (9).

2. The adjustable-thickness plastic melt rolling and cooling sheet forming device according to claim 1, characterized in that, A rotating shaft (12) is rotatably mounted on the outer side of each of the two strip-shaped vertical plates (2). Gears (13) are mounted on the hollow shafts (32) of the rotating shafts (12) and the fixed roller (4), and the two gears (13) mesh with each other. A first sprocket (14) is mounted on the hollow shafts (32) of the rotating shafts (12) and the moving roller (5). The two first sprockets (14) are connected by a first chain (15). A pair of tensioners (16) are provided next to the first chain (15). The base of the tensioner (16) is fixed to the strip-shaped vertical plate (2). On the tensioner (16), a second sprocket (17) is rotatably mounted on the output rod. The second sprocket (17) is always pressed on the first chain (15). A second motor (18) and a second gearbox (19) are mounted on the frame (1). The output shaft of the second motor (18) is connected to the input shaft of the second gearbox (19). A third sprocket (20) is mounted on the output shaft of the second gearbox (19) and the hollow shaft (32) of the fixed roller (4). The two third sprockets (20) are connected by a second chain (21).

3. The adjustable-thickness plastic melt rolling and cooling sheet forming device according to claim 1, characterized in that, The guide roller (3), fixed roller (4) and moving roller (5) have the same structure, each including a hollow roller (31), two hollow shafts (32) and a cylinder (33). The two hollow shafts (32) are respectively installed at both ends of the hollow roller (31) and are connected to the hollow roller (31). The cylinder (33) is installed inside the hollow roller (31), and multiple evenly distributed spiral grooves (34) are provided on the outer side of the cylinder (33).

4. The adjustable-thickness plastic melt rolling and cooling sheet forming device according to claim 1, characterized in that, The two strip-shaped vertical plates (2) are inclined upwards at their rear ends, and the angle between the strip-shaped vertical plates (2) and the horizontal plane is 30 degrees to 45 degrees.

5. The adjustable-thickness plastic melt rolling and cooling sheet forming apparatus according to claim 1, characterized in that, The sliding grooves inside the rectangular through holes of the screw (9) and the strip plate (2) are parallel to the strip plate (2).

6. The adjustable-thickness plastic melt rolling and cooling sheet forming apparatus according to claim 1, characterized in that, The length of the movable plate (8) is less than the length of the rectangular through hole on the strip plate (2).

7. The adjustable-thickness plastic melt rolling and cooling sheet forming apparatus according to claim 3, characterized in that, The hollow roller (31) and the two hollow shafts (32) are all on the same axis.

8. The adjustable-thickness plastic melt rolling and cooling sheet forming apparatus according to claim 3, characterized in that, The outer radius of the cylinder (33) is equal to the inner radius of the hollow roller (31).

9. The adjustable-thickness plastic melt rolling and cooling sheet forming apparatus according to claim 3, characterized in that, The length of the cylinder (33) is less than the inner cavity length of the hollow roller (31), and the two ends of the cylinder (33) do not contact the two ends of the inner cavity of the hollow roller (31).

10. The adjustable-thickness plastic melt rolling and cooling sheet forming apparatus according to claim 3, characterized in that, Rotary joints (6) are installed on the hollow shafts (32) at both ends of the guide roller (3), fixed roller (4) and moving roller (5).

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