EVA (Ethylene Vinyl Acetate) sheet cutting machine

Abstract

The utility model relates to the technical field of sheet processing, and provides an EVA sheet cutting machine which comprises a rack, a driving roller and a guide roller which are arranged on the rack, a saw belt used for cutting an EVA sheet is arranged between the driving roller and the guide roller, a workbench used for placing the EVA sheet is arranged on the rack, and the EVA sheet cutting machine further comprises a pre-pressing roller. The pre-pressing roller is in transmission connection with the guide roller through a pre-pressing belt; the pre-pressing belt gradually inclines downwards in the conveying direction of the EVA sheets. The sheet cutting machine can pre-tighten EVA sheets, reduce the influence caused by sheet upwarp, and improve the sheet cutting quality.

Description

Technical Field

[0001] This utility model relates to the field of sheet processing technology, specifically to an EVA sheet slicing machine. Background Technology

[0002] During EVA sheet production, EVA sheets are first foamed to a predetermined thickness. When different thicknesses are required, a slitting machine is used to cut the foamed sheets into sheets of the required thickness.

[0003] This process is typically carried out using a slitting machine. Existing slitting machines generally use two slitting wheels with a saw blade mounted on them. Driven by a motor, the saw blade effectively cuts the material. This processing method offers high slitting efficiency and is suitable for the fine processing of various rubber and foam materials. However, for harder materials like EVA, the high-speed rotating saw blade can easily cause the sheet to shift, affecting the cutting quality. Current technology generally improves processing quality by using upper and lower rollers to clamp the sheet, for example:

[0004] CN212241152U discloses a slicing machine suitable for EVA sheets of different thicknesses, including a frame, a drive guide roller, a driven guide roller, and a cutter. The two ends of the drive guide roller and the two ends of the driven guide roller are mounted on the frame and can rotate around their own central axis. The driven guide roller is located above the drive guide roller and is driven by a motor. The two ends of the cutter are mounted on the frame and are located at the end between the drive guide roller and the driven guide roller. A guide roller adjustment mechanism is provided between the driven guide roller and the frame, and a cutter adjustment mechanism is provided between the cutter and the frame. This patent allows for the cutting of sheets of different thicknesses through adjustable cutter positions. Essentially, it adjusts the degree of pressure applied to the EVA sheet to meet processing requirements. However, if the pressure is too loose, stable cutting cannot be guaranteed; if the pressure is too tight, the EVA sheet at the end will warp. Although it will be pressed down when entering the two guide rollers to prevent an increased cutting angle, this wobble will cause slight shaking of the saw blade, resulting in an uneven cut surface or even breakage.

[0005] Therefore, the technical problem to be solved in this case is: how to further optimize the EVA sheet slicing machine. Utility Model Content

[0006] To solve the above-mentioned technical problems, this utility model provides an EVA sheet slicing machine. This slicing machine can pre-tighten the EVA sheet, reduce the impact of sheet warping, and improve the quality of the sheet cut surface.

[0007] The technical solution of this utility model is:

[0008] An EVA sheet slicing machine includes a frame, a drive roller and a guide roller mounted on the frame, a saw blade for slicing the EVA sheet is provided between the drive roller and the guide roller, a worktable for feeding the EVA sheet is provided on the frame, and a pre-pressure roller is also included; the pre-pressure roller and the guide roller are connected by a pre-pressure belt; the pre-pressure belt gradually slopes downward along the conveying direction of the EVA sheet.

[0009] In the above-mentioned EVA sheet slicing machine, the inclination angle of the pre-compression belt is no greater than 45°.

[0010] In the above-mentioned EVA sheet slicing machine, a first sliding module is provided on both sides of the frame; the two ends of the guide roller are respectively connected to the first sliding module on both sides of the frame for vertical lifting.

[0011] In the above-mentioned EVA sheet slicing machine, the first sliding module includes an adjusting handwheel for adjusting the height of the guide roller, a lead screw, and a first slider.

[0012] In the above-mentioned EVA sheet slitting machine, the pre-compression roller is slidably connected to the frame and moves vertically in sync with the guide roller.

[0013] In the above-mentioned EVA sheet slicing machine, a second sliding module is provided on both sides of the frame; the second sliding module includes a guide rail disposed on the frame and a second slider slidably connected to the guide rail; the first slider and the second slider are fixedly connected by a synchronizing rod.

[0014] In the above-mentioned EVA sheet slicing machine, the worktable is provided with an anti-deviation module; the anti-deviation module includes two baffles symmetrically arranged on both sides of the worktable; the baffles are slidably connected to the worktable to adjust the distance between the two baffles.

[0015] In the above-mentioned EVA sheet slicing machine, the worktable is provided with multiple through slots; the baffle is slidably connected to the worktable by fastening bolts passing through the through slots.

[0016] One of the above-described technical solutions of this utility model has at least one of the following advantages or beneficial effects:

[0017] This invention uses pre-pressure rollers and pre-pressure belts to limit the EVA sheet, preventing the rear section of the cut EVA sheet from warping up, thereby improving the quality of the sheet cut surface. In addition, this invention is also applicable to the slicing of EVA sheets of various thicknesses, and increases the deviation range of the adjustment of the pressing amount, thereby reducing the time for repeated calibration. Attached Figure Description

[0018] Figure 1 This is a schematic diagram illustrating the operation of Embodiment 1 of this utility model;

[0019] Figure 2 This is a three-dimensional schematic diagram of the main structure of Embodiment 1 of this utility model;

[0020] Figure 3 This is a second three-dimensional schematic diagram of the main structure of Embodiment 1 of this utility model;

[0021] Figure 4 This is a top view of Embodiment 1 of the present invention.

[0022] The correspondence between the labels in the diagram is as follows:

[0023] Frame 1; First sliding module 11; Adjusting handwheel 111; Lead screw 112; First slider 113; Second sliding module 12; Guide rail 121; Second slider 122; Synchronizing rod 123; Drive roller 2; Guide roller 3; Preload roller 4; Preload belt 101; Worktable 5; Baffle 51; Through groove 52; Saw blade 6; EVA sheet a. Detailed Implementation

[0024] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0025] Example 1

[0026] refer to Figures 1-4 An EVA sheet slicing machine includes a frame 1, a drive roller 2 and a guide roller 3 mounted on the frame 1, a saw blade 6 for slicing EVA sheet a between the drive roller 2 and the guide roller 3, a worktable 5 for placing EVA sheet a on the frame 1, and a pre-pressure roller 4; the pre-pressure roller 4 and the guide roller 3 are connected by a pre-pressure belt 101; the pre-pressure belt 101 gradually slopes downward along the conveying direction of the EVA sheet a.

[0027] In practical applications, to ensure a certain amount of downward pressure and maintain continuous downward force, the tilt angle of the preload belt 101 is no greater than 45°. In this embodiment, the tilt angle of the preload belt 101 is 20°. It should be noted that since the saw blade 6 is a mature technology in the field, such as the saw blade 6 disclosed in CN210025471U, the driving structure of the saw blade 6 is not described in detail in this embodiment.

[0028] The slicing process in this embodiment is as follows: The EVA sheet a to be sliced ​​is input from the workbench 5, passes through the pre-pressure roller 4 and is gradually pressed by the pre-pressure belt 101. When the EVA sheet a enters the gap between the drive roller 2 and the guide roller 3, the EVA sheet a is clamped in the gap between the drive roller 2 and the guide roller 3. The drive roller 2 is driven to rotate by a motor (not shown in the figure). Under the action of the drive roller 2, the guide roller 3 follows to rotate. The pre-pressure roller 4 is driven to rotate by the pre-pressure belt 101, so that the EVA sheet a moves towards the saw belt 6 to complete the cutting. The cut EVA sheet a is divided into upper slices and lower slices. The upper slices continue to be conveyed forward, and the lower slices fall out from below the frame 1.

[0029] In this embodiment, the pre-pressure roller 4 and pre-pressure belt 101 limit the EVA sheet a, preventing the rear section of the cut EVA sheet a from warping, thereby improving the quality of the sheet cut surface. Specifically, the pre-pressure roller 4 not only restricts the feed, but also prevents the EVA sheet a from warping even if the guide roller 3 and drive roller 2 apply excessive pressure, thus preventing slight shaking of the saw belt 6 from causing unevenness or even breakage of the sheet cut surface. Furthermore, this embodiment is applicable to the slicing of EVA sheets a of various thicknesses and increases the range of deviation for adjusting the downward pressure, thereby reducing the time required for repeated calibration.

[0030] In this embodiment, specifically, a first sliding module 11 is provided on both sides of the frame 1; the two ends of the guide roller 3 are respectively connected to the first sliding module 11 on both sides of the frame 1 for vertical lifting. More specifically, the first sliding module 11 includes an adjusting handwheel 111, a lead screw 112, and a first slider 113 for adjusting the height of the guide roller 3.

[0031] Under the above design, the height of the guide roller 3 is adjustable. Simply rotate the adjusting handwheel 111 to make the guide roller 3 rise and fall vertically, thereby changing the distance between the guide roller 3 and the drive roller 2, making this embodiment applicable to EVA sheets of various thicknesses.

[0032] In a preferred embodiment, the preload roller 4 is slidably connected to the frame 1 and moves vertically in sync with the guide roller 3. Specifically, a second sliding module 12 is provided on both sides of the frame 1; the second sliding module 12 includes a guide rail 121 disposed on the frame 1 and a second slider 122 slidably connected to the guide rail 121; the first slider 113 and the second slider 122 are fixedly connected by a synchronizing rod 123.

[0033] Under the preferred embodiment described above, when the height of the guide roller 3 needs to be adjusted to accommodate EVA sheets a of different thicknesses, the relative positions of the preload roller 4 and the guide roller 3 remain consistent, and the preload belt 101 remains taut. Of course, those skilled in the art can also drive the preload roller 4 to rise and fall vertically using another adjustment structure, allowing the guide roller 3 and the preload roller 4 to be adjusted independently. This embodiment is designed with the convenience of adjustment in mind.

[0034] Of course, in practical applications, the first slider 113 and the guide roller 3, and the second slider 122 and the preload roller 4, all need to be connected by bearings.

[0035] In this embodiment, the workbench 5 is equipped with an anti-deviation module; the anti-deviation module includes two baffles 51 symmetrically arranged on both sides of the workbench 5; the baffles 51 are slidably connected to the workbench 5 to adjust the distance between the two baffles 51. Specifically, the workbench 5 is provided with multiple through slots 52; the baffles 51 are slidably connected to the workbench 5 by fastening bolts passing through the through slots 52.

[0036] Under the above design, this embodiment ensures that the EVA sheet a enters the cutting position horizontally, while also limiting the left and right jumping problem of the EVA sheet a during cutting.

[0037] Although embodiments of the present invention have been shown and described, those skilled in the art will understand that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the claims and their equivalents.

Claims

1. An EVA sheet slicing machine, comprising a frame, a drive roller and a guide roller mounted on the frame, wherein a saw blade for slicing EVA sheets is disposed between the drive roller and the guide roller, and a worktable for placing EVA sheets is provided on the frame, characterized in that, It also includes a pre-compression roller; the pre-compression roller and the guide roller are connected by a pre-compression belt; the pre-compression belt gradually slopes downward along the conveying direction of the EVA sheet.

2. The EVA sheet slicing machine according to claim 1, characterized in that, The inclination angle of the preloaded belt is no greater than 45°.

3. The EVA sheet slicing machine according to claim 1, characterized in that, The frame is provided with a first sliding module on both sides; the two ends of the guide roller are respectively connected to the first sliding module on both sides of the frame for vertical lifting.

4. The EVA sheet slicing machine according to claim 3, characterized in that, The first sliding module includes an adjusting handwheel for adjusting the height of the guide roller, a lead screw, and a first slider.

5. The EVA sheet slicing machine according to claim 4, characterized in that, The preload roller is slidably connected to the frame and moves vertically in sync with the guide roller.

6. The EVA sheet slicing machine according to claim 5, characterized in that, The frame is also provided with a second sliding module on both sides; the second sliding module includes a guide rail on the frame and a second slider slidably connected to the guide rail; the first slider and the second slider are fixedly connected by a synchronizing rod.

7. The EVA sheet slicing machine according to claim 1, characterized in that, The workbench is equipped with an anti-deviation module; the anti-deviation module includes two baffles symmetrically arranged on both sides of the workbench; the baffles are slidably connected to the workbench to adjust the distance between the two baffles.

8. The EVA sheet slicing machine according to claim 7, characterized in that, The workbench is provided with multiple through slots; the baffle is slidably connected to the workbench by fastening bolts passing through the through slots.

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