PVC plate reprocessing bending forming device

Abstract

The application belongs to the technical field of PVC plate processing, and discloses a PVC plate reprocessing bending forming device, which comprises a bottom plate, a support cabinet and an arc-shaped heating plate. An installation seat is arranged on the bottom plate beside the support cabinet. Two arc-shaped holes are symmetrically arranged on the installation seat. A waist-shaped hole is arranged at one end of each of the two arc-shaped holes in a vertical manner and communicates with the corresponding arc-shaped hole. A lifting frame is vertically and slidably arranged on the side of the installation seat away from the support cabinet. A lifting assembly is arranged on the installation seat. Two sliding blocks are horizontally and slidably arranged on the lifting frame. A forming rod is arranged on one side of each of the sliding blocks. The forming rod is slidably connected with the arc-shaped hole and the waist-shaped hole. The PVC plate is heated and softened by the arc-shaped heating plate. The fixing rod first vertically descends along the waist-shaped hole to contact the middle part of the PVC plate, and then slides along the arc-shaped hole to expand and press on both sides. The pressing mode from the middle to both sides avoids wrinkles or stress concentration caused by traditional one-time bending, and makes the bending curvature more uniform and natural.

Description

Technical Field

[0001] This utility model relates to the field of PVC sheet processing technology, and in particular to a PVC sheet reprocessing bending and forming device. Background Technology

[0002] PVC sheets account for the largest share in the building materials industry, at 60%, followed by the packaging industry, and several other smaller-scale applications. Based on rigidity, they can be divided into soft PVC and rigid PVC. Based on manufacturing process, they can be divided into PVC skinned foamed sheets and PVC free-foamed sheets. Based on transparency, they can be divided into transparent PVC sheets and PVC boards.

[0003] Chinese utility model patent with publication number CN222681748U discloses a PVC sheet reprocessing bending and forming device, including a base, a fixing frame fixedly installed on one side of the base, two heating rollers fixedly installed on the surface of the base, and two pressure plates provided on one side of the fixing frame. The pressure plates press down on the heated PVC sheet on the heating rollers to bend it.

[0004] Regarding the aforementioned technologies, the inventors believe that the following defects exist: the above-mentioned device achieves one-time bending by directly pressing down on both sides of the PVC sheet with two pressure plates. During this process, the PVC sheet is not only prone to wrinkles and stress concentration, but also has an unnatural bending curvature, affecting the molding quality. Utility Model Content

[0005] To address the aforementioned problems, this utility model provides a device for reprocessing and bending PVC sheets.

[0006] The above-mentioned technical objective of this utility model is achieved through the following technical solution: a PVC sheet reprocessing bending and forming device, including a base plate, a support cabinet on the base plate, an arc-shaped heating plate on the support cabinet, a mounting seat on the base plate next to the support cabinet, two arc-shaped holes symmetrically opened on the mounting seat, and a vertically arranged waist-shaped hole communicating with the corresponding arc-shaped hole at one end of each of the two arc-shaped holes, a lifting frame vertically slidably arranged on the side of the mounting seat away from the support cabinet, a lifting component for driving the lifting frame to rise and fall on the mounting seat, two sliding blocks horizontally slidably arranged on the lifting frame, a forming rod on one side of each sliding block, and the forming rod slidingly engaging with the arc-shaped hole and the waist-shaped hole.

[0007] By adopting the above technical solution, a base plate, an arc-shaped heating plate, and a mounting base are set up. The arc-shaped heating plate heats and softens the PVC sheet. When the lifting component drives the lifting frame to descend, the fixing rod first descends vertically along the waist-shaped hole to contact the middle of the PVC sheet, and then slides along the arc-shaped hole to both sides to unfold and press. The pressing method from the middle to both sides avoids the wrinkles or stress concentration caused by traditional one-time bending, making the bending arc more uniform and natural.

[0008] Furthermore, a rotating tube is rotatably sleeved on the rod body located on the side of the mounting base away from the lifting frame.

[0009] By adopting the above technical solution and setting a rotating tube, the sliding friction between the fixed rod and the PVC sheet is converted into rolling friction, which reduces the risk of scratching the surface of the heated PVC sheet, and at the same time makes the pressing process smoother and reduces resistance.

[0010] Furthermore, the lifting frame includes lifting blocks that are vertically slidably disposed on both sides of the mounting base, and two horizontally arranged guide rods are disposed between the two lifting blocks. Guide holes are provided on the sliding blocks corresponding to the guide rods, and the sliding blocks are slidably sleeved on the two guide rods through the two guide holes.

[0011] By adopting the above technical solution and setting guide rods and guide holes, the stability of the sliding block is ensured.

[0012] Furthermore, the lifting assembly includes a first electric push rod vertically mounted on the mounting base. The push rod of the first electric push rod points downward and is provided with a connecting seat, which is connected to the middle of two guide rods.

[0013] By adopting the above technical solution, a first electric push rod and a connecting seat are set up. The first electric push rod is connected to the middle of the guide rod through the connecting seat, so as to realize the symmetrical drive of the lifting frame and ensure that the force on both sides is uniform during the lifting process.

[0014] Furthermore, both sides of the mounting base are vertically provided with slide rails, and the lifting block is slidably connected to the corresponding slide rail via a slider.

[0015] By adopting the above technical solution, slide rails are set up, and the slide rails on both sides of the mounting base cooperate with the slider on the lifting block to provide precise vertical guidance for the lifting frame and ensure that the lifting frame maintains vertical movement.

[0016] Furthermore, a U-shaped seat is provided on the base plate, and sliding holes are vertically opened on both sides of the U-shaped seat. A sliding column is slidably arranged in the sliding hole, and the sliding column is connected to the bottom of the mounting base. A second electric push rod is also vertically arranged in the U-shaped seat, and the piston rod of the second electric push rod is upward and connected to the bottom of the mounting base.

[0017] By adopting the above technical solution, a U-shaped seat, a sliding column, and a second electric push rod are set up. The second electric push rod pushes the mounting seat to rise and fall, realizing the overall height adjustment of the mounting seat. The pressing start position can be adjusted according to PVC sheets of different thicknesses, increasing the versatility of the device.

[0018] Furthermore, support components are provided on both sides of the support cabinet. Each support component includes two vertically mounted uprights on the base plate. A vertically sliding support rod is installed inside each upright. A support plate is installed at the upper end of both uprights. A third push rod is vertically mounted on the base plate between the two uprights. The push rod of the third push rod is connected upward to the bottom of the support plate.

[0019] By adopting the above technical solution, setting up a support plate and a third push rod, the two support plates and the top surface of the arc-shaped heating plate form a three-point support for the PVC sheet during heating, which avoids the PVC sheet from sagging due to its own weight, thus affecting the heating uniformity and ensuring stable heating effect.

[0020] Furthermore, the mounting base is provided with a protective shell, and the first electric push rod and the lifting frame are both located inside the protective shell.

[0021] By adopting the above technical solution, the protective shell encloses the moving parts such as the first electric push rod and the lifting frame, preventing dust and impurities from entering and affecting the operating accuracy of the equipment.

[0022] In summary, the present invention has the following beneficial effects: In this application, the PVC sheet is heated and softened by the arc-shaped heating plate. When the lifting assembly drives the lifting frame to descend, the fixing rod first descends vertically along the waist-shaped hole to contact the middle of the PVC sheet, and then slides along the arc-shaped hole to both sides to unfold and press. The pressing method from the middle to both sides avoids the wrinkles or stress concentration caused by the traditional one-time bending, making the bending arc more uniform and natural. Attached Figure Description

[0023] Figure 1 This is a schematic diagram of the overall structure of an embodiment of the present utility model;

[0024] Figure 2 This is a structural schematic diagram of the U-shaped base and mounting base according to an embodiment of this utility model;

[0025] Figure 3 This is a schematic diagram of the mounting base and lifting frame according to an embodiment of this utility model;

[0026] Figure 4 This is a schematic diagram of the structure of the mounting base according to an embodiment of this utility model.

[0027] In the diagram: 10. Base plate; 11. Support cabinet; 12. Arc-shaped heating plate; 20. Mounting base; 21. Arc-shaped hole; 22. Waist-shaped hole; 23. Slide rail; 24. Protective shell; 30. Lifting frame; 31. Lifting block; 32. Guide rod; 40. Lifting assembly; 41. First electric push rod; 42. Connecting seat; 50. Sliding block; 51. Forming rod; 52. Rotating tube; 60. U-shaped seat; 61. Sliding column; 62. Second electric push rod; 70. Support assembly; 71. Riser; 72. Upright; 73. Support plate; 74. Third push rod. Detailed Implementation

[0028] The technical solutions in the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, and not all embodiments. All other embodiments obtained by those skilled in the art based on the embodiments of this application without creative effort are within the scope of protection of this application.

[0029] like Figure 1-4 As shown in the embodiment of this application, a PVC sheet reprocessing bending and forming device is disclosed, including a base plate 10, a support cabinet 11, an arc-shaped heating plate 12, a mounting base 20, and a lifting assembly 40. The support cabinet 11 is mounted on the base plate 10, the arc-shaped heating plate 12 is mounted on the support cabinet 11, and the mounting base 20 is mounted on the base plate 10 next to the support cabinet 11. Two arc-shaped holes 21 are symmetrically opened on the mounting base 20. Each of the two arc-shaped holes 21 has a vertically arranged waist-shaped hole 22 that communicates with the corresponding arc-shaped hole 21 at one end. A lifting frame 30 is vertically slidably mounted on the side of the mounting base 20 away from the support cabinet 11. The lifting assembly 40 is mounted on the mounting base 20 to drive the lifting frame 30 to rise and fall. Two sliding blocks 50 are horizontally slidably mounted on the lifting frame 30. A forming rod 51 is provided on one side of the sliding block 50. The forming rod 51 is slidably engaged with the arc-shaped hole 21 and the waist-shaped hole 22. The PVC sheet is softened by heating with the arc-shaped heating plate 12. When the lifting assembly 40 drives the lifting frame 30 to descend, the fixed rod first descends vertically along the waist-shaped hole 22 to contact the middle of the PVC sheet, and then slides along the arc-shaped hole 21 to both sides to unfold and press. The pressing method from the middle to both sides avoids the wrinkles or stress concentration caused by traditional one-time bending, making the bending arc more uniform and natural. Moreover, the arc radius of the arc hole 21 is consistent with the arc radius of the arc plate, ensuring the control of the bending radius and improving the molding quality. The forming rod 51 is located on the rod body of the mounting base 20 away from the lifting frame 30 and is rotatably fitted with a rotating tube 52. The sliding friction between the fixed rod and the PVC sheet is converted into rolling friction, reducing the risk of scratching the surface of the heated PVC sheet, while making the pressing process smoother and reducing resistance.

[0030] Specifically, the lifting frame 30 includes lifting blocks 31 vertically slidably mounted on both sides of the mounting base 20. Two horizontally arranged guide rods 32 are positioned between the two lifting blocks 31. Guide holes are provided on the sliding blocks 50 corresponding to the guide rods 32. The sliding blocks 50 are slidably fitted onto the two guide rods 32 through the two guide holes, ensuring the stability of the sliding blocks 50. Vertical slide rails 23 are provided on both sides of the mounting base 20. The lifting blocks 31 are slidably connected to the corresponding slide rails 23 via sliders. The slide rails 23 on both sides of the mounting base 20 cooperate with the sliders on the lifting blocks 31 to provide precise vertical guidance for the lifting frame 30, ensuring that the lifting frame 30 maintains vertical movement. The lifting assembly 40 includes a first electric push rod 41 vertically mounted on the mounting base 20. The push rod of the first electric push rod 41 points downwards and is provided with a connecting seat 42. The connecting seat 42 is connected to the middle of the two guide rods 32. The first electric push rod 41 is connected to the middle of the guide rods 32 via the connecting seat 42, achieving symmetrical driving of the lifting frame 30 and ensuring uniform force on both sides during lifting.

[0031] During setup, a U-shaped seat 60 is provided on the base plate 10. Vertical sliding holes are provided on both sides of the U-shaped seat 60, and sliding columns 61 are slidably installed within these holes. The sliding columns 61 are connected to the bottom of the mounting base 20. A second electric push rod 62 is also vertically installed inside the U-shaped seat 60. The piston rod of the second electric push rod 62 points upward and is connected to the bottom of the mounting base 20. The second electric push rod 62 pushes the mounting base 20 to rise and fall, achieving overall height adjustment of the mounting base 20. The pressing start position can be adjusted according to PVC sheets of different thicknesses, increasing the versatility of the device. Furthermore, the cooperation between the sliding columns 61 and the sliding holes ensures the stability and verticality of the mounting base 20 during lifting and lowering.

[0032] In the specific setup, support components 70 are provided on both sides of the support cabinet 11. Each support component 70 includes two vertically mounted tubes 71 on the base plate 10. Vertically sliding rods 72 are installed inside each tube 71. A support plate 73 is mounted on the upper end of both rods 72. A third push rod 74 is vertically mounted on the base plate 10 between the two tubes 71, with its push rod connecting upwards to the bottom of the support plate 73. During heating, the two support plates 73 and the top surface of the curved heating plate 12 form a three-point support for the PVC sheet, preventing the PVC sheet from sagging due to its own weight and affecting the uniformity of heating, thus ensuring stable heating. During bending, the third push rod 74 drives the support plates 73 to descend synchronously, releasing the support restrictions on both ends of the PVC sheet. Combined with the pressing action of the fixing rod, this allows the PVC sheet to bend smoothly along the curved heating plate 12. This ensures support stability during the heating stage and meets the movement requirements during the bending stage, improving the smoothness and precision of the bending process. Furthermore, the descent speed of the support plates 73 and the pressing speed of the fixing rod can be adjusted.

[0033] The mounting base 20 is equipped with a protective shell 24, within which the first electric push rod 41 and the lifting frame 30 are located. The protective shell 24 encloses the moving parts such as the first electric push rod 41 and the lifting frame 30, preventing dust and impurities from entering and affecting the operating accuracy of the equipment. It also prevents operators from contacting the moving parts, improving the safety of equipment operation. Furthermore, it provides some sound insulation and aesthetic benefits, thus improving the working environment.

[0034] The arc-shaped heating plate 12 includes a metal plate body and multiple sets of metal heating tubes evenly embedded along the length of the plate body. A temperature sensor mounting slot is reserved within the metal plate body, and a temperature sensor is embedded therein to detect the temperature. When a PVC sheet is placed on the arc-shaped heating plate 12, the contact area directly transfers heat to the contact surface of the PVC sheet through heat conduction. Simultaneously, the high-temperature surface of the heating plate releases infrared heat radiation to the non-contact areas of the PVC sheet, causing the PVC sheet to gradually heat up.

[0035] The operating principle of the PVC sheet reprocessing bending and forming device in this embodiment is as follows: The third push rod 74 is activated to adjust the height of the support plate 73. The PVC sheet is then placed stably, allowing the support plate 73 and the arc-shaped heating plate 12 to form a three-point support. The arc-shaped heating plate 12 heats the PVC sheet. After the sheet is heated, the first electric push rod 41 is activated to drive the lifting frame 30 downwards. The forming rod 51 first vertically contacts the center of the sheet along the oblong hole 22, then slides and presses against both sides along the arc-shaped hole 21. Simultaneously, the third push rod 74 drives the support plate 73 to descend synchronously to cooperate with the bending. Afterwards, the lifting frame 30 and the forming rod 51 are reset, and the bent PVC sheet is removed.

[0036] The above description is merely a preferred embodiment of this utility model. The protection scope of this utility model is not limited to the above embodiments. All technical solutions falling within the scope of this utility model's concept are protected. It should be noted that for those skilled in the art, any improvements and modifications made without departing from the principle of this utility model should also be considered within the protection scope of this utility model.

Claims

1. A device for reprocessing and bending PVC sheets, characterized in that: The system includes a base plate (10), on which a support cabinet (11) is provided. An arc-shaped heating plate (12) is provided on the support cabinet (11). A mounting base (20) is provided on the base plate (10) next to the support cabinet (11). Two arc-shaped holes (21) are symmetrically opened on the mounting base (20). At the end of each of the two arc-shaped holes (21) that are close to each other, there are vertically arranged waist-shaped holes (22) that communicate with the corresponding arc-shaped holes (21). A lifting frame (30) is vertically slidably arranged on the side of the mounting base (20) away from the support cabinet (11). A lifting assembly (40) for driving the lifting frame (30) to lift is provided on the mounting base (20). Two sliding blocks (50) are horizontally slidably arranged on the lifting frame (30). A forming rod (51) is provided on one side of the sliding block (50). The forming rod (51) is slidably engaged with the arc-shaped holes (21) and the waist-shaped holes (22).

2. The PVC sheet reprocessing bending and forming device according to claim 1, characterized in that: The forming rod (51) is rotatably sleeved on the rod body located on the side of the mounting base (20) away from the lifting frame (30).

3. The PVC sheet reprocessing bending and forming device according to claim 1, characterized in that: The lifting frame (30) includes lifting blocks (31) that are vertically slidably disposed on both sides of the mounting base (20). Two horizontally arranged guide rods (32) are disposed between the two lifting blocks (31). The sliding block (50) has guide holes corresponding to the guide rods (32). The sliding block (50) is slidably sleeved on the two guide rods (32) through the two guide holes.

4. The PVC sheet reprocessing bending and forming device according to claim 3, characterized in that: The lifting assembly (40) includes a first electric push rod (41) vertically mounted on the mounting base (20). The push rod of the first electric push rod (41) is downward and is provided with a connecting seat (42). The connecting seat (42) is connected to the middle of two guide rods (32).

5. The PVC sheet reprocessing bending and forming device according to claim 4, characterized in that: The mounting base (20) is provided with vertical slide rails (23) on both sides, and the lifting block (31) is slidably connected to the corresponding slide rail (23) through a slider.

6. The PVC sheet reprocessing bending and forming device according to claim 1, characterized in that: A U-shaped seat (60) is provided on the base plate (10). The U-shaped seat (60) has vertical sliding holes on both sides. A sliding column (61) is slidably arranged in the sliding holes. The sliding column (61) is connected to the bottom of the mounting base (20). A second electric push rod (62) is also vertically arranged in the U-shaped seat (60). The piston rod of the second electric push rod (62) is upward and connected to the bottom of the mounting base (20).

7. The PVC sheet reprocessing bending and forming device according to claim 1, characterized in that: The support cabinet (11) is provided with support components (70) on both sides. The support components (70) include two vertical tubes (71) vertically arranged on the base plate (10). A vertical pole (72) is vertically slidably arranged inside the vertical tube (71). A support plate (73) is provided at the upper end of the two vertical poles (72). A third push rod (74) is vertically arranged on the plate between the two vertical tubes (71) of the base plate (10). The push rod of the third push rod (74) is connected upward to the bottom of the support plate (73).

8. The PVC sheet reprocessing bending and forming device according to claim 4, characterized in that: The mounting base (20) is provided with a protective shell (24), and the first electric push rod (41) and the lifting frame (30) are both located inside the protective shell (24).

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