Cutting equipment for PU leather

Abstract

The utility model discloses cutting equipment for PU (polyurethane) leather, which belongs to the field of cutting equipment and comprises a bottom plate, a support frame fixedly mounted on the bottom plate, a first air cylinder fixedly connected onto the support frame, a cutter movably mounted below the first air cylinder, and a worktable fixedly mounted below the cutter on the bottom plate. A tightening and fixing assembly is movably installed on the workbench, through the arranged tightening and fixing assembly, the fixing plate moves downwards to fix the leather on the workbench, the push rod contracts upwards and is separated from the side plate, and the gravity roller rotates towards the interior of the tightening groove under the action of gravity and extrudes the leather above the tightening groove. The leather is kept tightened, the cutting size of the cutting knife is more accurate, errors are not prone to occurring, fixing and tightening of the leather are achieved through the fixing plate and the gravity roller, manual operation is avoided, fixing and replacing of the leather are faster, time is saved, and the working efficiency is improved.

Description

Technical Field

[0001] The utility model relates to the field of cutting equipment, in particular to a cutting equipment for PU leather. Background Art

[0002] PU is the abbreviation of polyurethane in English, and its chemical name in Chinese is "polyurethane". PU leather is the surface of polyurethane components and is widely used in the decoration of bags, clothing, shoes, vehicles, furniture, etc. The back cover of mobile phone batteries is coated with PU leather, making the battery cover more wear-resistant and waterproof. The production process of PU leather requires cutting. In the prior art, the Chinese utility model patent with the publication number: CN212754519U discloses a leather cutting device for leather shoe production. In this utility model, the leather is pressed by a second pressure plate to make it fit the surface of the fixed plate. The internal thread of the threaded hole is connected to a first bolt. Tightening the first bolt drives the first pressure plate to press one end of the leather to prevent the leather from shifting during cutting and the cutting size from deviating.

[0003] However, it is time-consuming to tighten the bolts to lower the first pressure plate, and the bolts need to be operated manually. During the fixing, installation, removal and replacement of the leather, workers need to repeatedly operate the bolts, which is cumbersome and affects work efficiency. At the same time, when the leather is laid on the fixed plate, wrinkles may occur. When the wrinkles of the leather are smoothed manually, due to the frequent cutting and replacement of the leather workpieces, workers are likely to ignore the wrinkles of the leather, resulting in deviations in the cutting size, so improvement is needed. Utility Model Content

[0004] The main purpose of the utility model is to provide a PU leather cutting device, which can effectively solve the problems in the background technology.

[0005] In order to achieve the above purpose, the technical solution adopted by the utility model is:

[0006] The cam is fixedly mounted on the workbench, and the cam is fixedly connected to the workbench with a plurality of cylinders. The cam is fixedly mounted on the workbench with a plurality of cylinders. The cam is fixedly mounted on the workbench with a plurality of cylinders.

[0007] Preferably, the tightening and fixing assembly further includes a tightening groove, which is provided on the workbench, and the gravity roller is movably installed in the tightening groove. The number of the extension plates and the connecting plates is two, and the gravity roller is located between the two connecting plates.

[0008] Preferably, the tightening and fixing assembly further includes a bearing, and the rotating rod is movably mounted on the extension plate via the bearing.

[0009] Preferably, leather is movably mounted on the workbench, and the leather is located below the fixed plate and the gravity roller.

[0010] Preferably, the tightening and fixing assembly further includes a No. 2 bracket and a No. 3 cylinder, the No. 2 bracket is fixedly connected to the base plate and is located on the side of the extension plate, and the No. 3 cylinder is fixedly connected to the No. 2 bracket.

[0011] Preferably, the output shaft of the No. 3 cylinder is fixedly connected to a push rod, and the push rod is located above the side plate.

[0012] Compared with the prior art, the present invention has the following beneficial effects:

[0013] 1. In the present invention, the leather is laid on the workbench through the tensioning and fixing assembly. The fixing plate is lowered by the No. 2 cylinder, and the leather is fixed to the workbench by the fixing plate. The No. 3 cylinder retracts the push rod upward, separating it from the side plate. Under the action of gravity, the gravity roller rotates into the tensioning groove to press the leather, making it taut. This allows the cutting knife to cut more accurately and prevent dimensional errors.

[0014] 2. In the present invention, by providing a tightening and fixing assembly, the fixing and tightening of the leather are respectively achieved through the fixing plate and the gravity roller, avoiding manual operation, making the fixing and replacement process of the leather more time-saving and improving work efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is a schematic diagram of the overall structure of the utility model;

[0016] Figure 2 This is a schematic structural diagram of the tensioning groove of the present utility model;

[0017] Figure 3 This is a schematic structural diagram of the fixing plate of the present utility model;

[0018] Figure 4 This is a structural diagram of the connecting plate, gravity roller, side plate and push rod of the utility model.

[0019] In the figure: 1. Base plate; 2. Support frame; 3. Cylinder No. 1; 4. Cutting knife; 5. Workbench; 6. Tensioning and fixing assembly; 601. Tensioning groove; 602. Bracket No. 1; 603. Cylinder No. 2; 604. Fixing plate; 605. Extension plate; 606. Rotating rod; 607. Bearing; 608. Connecting plate; 609. Gravity roller; 610. Side plate; 611. Bracket No. 2; 612. Cylinder No. 3; 613. Push rod; 7. Leather. DETAILED DESCRIPTION

[0020] In order to make the technical means, creative features, objectives and effects achieved by the present invention easier to understand, the present invention is further described below in conjunction with specific implementation methods.

[0021] like Figure 1 and Figure 3As shown, a cutting device for PU leather comprises a bottom plate 1, a support frame 2 is fixedly mounted on the bottom plate 1, a No. 1 air cylinder 3 is fixedly connected to the support frame 2, a cutting knife 4 is movably mounted below the No. 1 air cylinder 3, a workbench 5 is fixedly mounted on the bottom plate 1 below the cutting knife 4, a tightening and fixing assembly 6 is movably mounted on the workbench 5, and the tightening and fixing assembly 6 comprises a No. 1 bracket 602, a No. 2 air cylinder 603, a fixing plate 604, an extension plate 605, a rotating rod 606, a connecting plate 608, a gravity roller 609, a side plate 610 and a push rod 613, the No. 1 bracket 602 is fixedly connected to the workbench 5, the No. 2 air cylinder 603 is fixedly connected to the Connected to the No. 1 bracket 602, the fixed plate 604 is fixedly connected to the output shaft of the No. 2 cylinder 603, and the leather 7 is movably installed on the workbench 5. The leather 7 is located below the fixed plate 604 and the gravity roller 609. The leather 7 is laid on the workbench 5, and the tensioning groove 601 is located below the leather 7. By starting the No. 2 cylinder 603, the fixed plate 604 moves downward, so that the fixed plate 604 fixes the leather 7 downward and limits it to the workbench 5, so that the leather 7 is quickly fixed. When the leather 7 is replaced, the fixed plate 604 is also conveniently moved upward by the No. 2 cylinder 603, so that the leather 7 and the fixed plate 604 can be quickly released from the fixed state.

[0022] like Figure 1 、 Figure 2 and Figure 4As shown, the extension plate 605 is fixedly connected to the rear position of the workbench 5, the rotating rod 606 is movably installed on the extension plate 605, the connecting plate 608 is fixedly connected to the rotating rod 606, one end of the connecting plate 608 is movably installed with a gravity roller 609, and the other end of the connecting plate 608 is fixedly connected to the side plate 610, the push rod 613 is movably installed with the side plate 610, the tightening and fixing component 6 also includes a tightening groove 601, the tightening groove 601 is opened on the workbench 5, the gravity roller 609 is movably installed in the tightening groove 601, the number of the extension plate 605 and the connecting plate 608 are both two, the gravity roller 609 is located between the two connecting plates 608, the tightening and fixing component 6 also includes a bearing 607, the rotating rod 606 is movably installed with the extension plate 605 through the bearing 607, and the tightening and fixing component 6 also includes a No. 2 bracket. 611 and No. 3 cylinder 612, No. 2 bracket 611 is fixedly connected to the base plate 1 and is located at the side position of the extension plate 605, No. 3 cylinder 612 is fixedly connected to No. 2 bracket 611, and the output shaft of No. 3 cylinder 612 is fixedly connected to the push rod 613, and the push rod 613 is located above the side plate 610. The gravity roller 609 will move downward under the action of gravity, and the gravity roller 609 is pressed downward into the tensioning groove 601, pressing the leather 7 located above the tensioning groove 601, so that the leather 7 remains in a tensioned state, making the cutting more accurate, and the push rod 613 is moved up or down by the No. 3 cylinder 612, and the side plate 610 is squeezed by the push rod 613, so that the connecting plate 608 is easy to rotate upward, so that the gravity roller 609 moves upward synchronously and disengages from the leather 7, which is convenient for replacing the leather 7.

[0023] It should be noted that the present invention is a cutting device for PU leather. The leather material 7 is laid on the workbench 5, and the No. 2 cylinder 603 on the No. 1 bracket 602 is started, so that the output shaft of the No. 2 cylinder 603 pushes the fixed plate 604 downward. There are four fixed plates 604, two in a group, and the two groups are respectively located at the front and rear sides of the workbench 5. The leather material 7 is fixed to the workbench 5 by pressing down the fixed plates 604. The No. 3 on the No. 2 cylinder 603 is pressed downward. The cylinder 612 is reset upward, so that the output shaft of the third cylinder 612 is retracted upward, and the push rod 613 is moved upward. The connecting plate 608 and the gravity roller 609 are acted upon by gravity and rotate downward. The side plate 610 loses the pressure of the push rod 613 and rotates upward synchronously. The connecting plate 608 rotates on the extension plate 605 through the rotating rod 606 and the bearing 607. When the gravity roller 609 rotates to the position above the tightening groove 601, it contacts the leather 7. The third cylinder 612 is reset. When the leather material 7 is tightened and straightened by the gravity roller 609, the leather material 7 is not easily wrinkled. Then the No. 1 cylinder 3 is started to move the cutting knife 4 downward to cut the leather material 7. After the cutting is completed, the output shaft of the No. 3 cylinder 612 is extended, and the push rod 613 is moved downward. The push rod 613 is pressed down. After contacting the side panel 610, the side panel 610 rotates downward, the connecting plate 608 fixedly connected to the side panel 610 rotates upward, the gravity roller 609 moves upward and separates from the leather 7, and the No. 2 cylinder 603 resets, causing the fixed plate 604 to move upward and separate from the leather 7, thereby facilitating the replacement of the leather 7. By tightening the leather 7, wrinkles are less likely to appear, and the cutting of the leather 7 is more accurate. The fixing and tightening of the leather 7 avoids manual operation, saving time and improving work efficiency.

[0024] The above illustrates and describes the basic principles, main features, and advantages of the present invention. These are merely preferred embodiments of the present invention, and while their descriptions are relatively specific and detailed, they should not be construed as limiting the scope of the present invention. Those skilled in the art should understand that the present invention is not limited to the aforementioned embodiments. Numerous changes, modifications, substitutions, and variations may be made to the embodiments without departing from the principles and purpose of the present invention. Such changes and improvements fall within the scope of the present invention. The scope of protection claimed in this invention is defined by the appended claims and their equivalents.

Claims

1. A cutting device for PU leather, comprising a base plate (1), a support frame (2) fixedly mounted on the base plate (1), a No. 1 air cylinder (3) fixedly connected to the support frame (2), a cutting knife (4) movably mounted below the No. 1 air cylinder (3), and a workbench (5) fixedly mounted on the base plate (1) below the cutting knife (4), characterized in that: A tightening and fixing assembly (6) is movably mounted on the workbench (5), and the tightening and fixing assembly (6) comprises a No. 1 bracket (602), a No. 2 cylinder (603), a fixing plate (604), an extension plate (605), a rotating rod (606), a connecting plate (608), a gravity roller (609), a side plate (610) and a push rod (613), wherein the No. 1 bracket (602) is fixedly connected to the workbench (5), the No. 2 cylinder (603) is fixedly connected to the No. 1 bracket (602), and the fixing plate (604) is fixedly connected to the output shaft of the No. 2 cylinder (603), the extension plate (605) is fixedly connected to the rear position of the workbench (5), the rotating rod (606) is movably installed on the extension plate (605), the connecting plate (608) is fixedly connected to the rotating rod (606), one end of the connecting plate (608) is movably installed with a gravity roller (609), and the other end of the connecting plate (608) is fixedly connected with a side plate (610), and the push rod (613) is movably installed with the side plate (610).

2. The PU leather cutting device according to claim 1, characterized in that: The tightening and fixing assembly (6) further includes a tightening groove (601), the tightening groove (601) is opened on the workbench (5), the gravity roller (609) is movably installed in the tightening groove (601), the number of the extension plate (605) and the connecting plate (608) are both two, and the gravity roller (609) is located between the two connecting plates (608).

3. The PU leather cutting device according to claim 2, characterized in that: The tightening and fixing assembly (6) further includes a bearing (607), and the rotating rod (606) is movably mounted on the extension plate (605) via the bearing (607).

4. The PU leather cutting device according to claim 3, characterized in that: A leather material (7) is movably mounted on the workbench (5), and the leather material (7) is located below the fixed plate (604) and the gravity roller (609).

5. The PU leather cutting device according to claim 4, characterized in that: The tightening and fixing assembly (6) further comprises a No. 2 bracket (611) and a No. 3 cylinder (612), wherein the No. 2 bracket (611) is fixedly connected to the bottom plate (1) and is located at a side position of the extension plate (605), and the No. 3 cylinder (612) is fixedly connected to the No. 2 bracket (611).

6. The PU leather cutting device according to claim 5, characterized in that: The output shaft of the No. 3 air cylinder (612) is fixedly connected to a push rod (613), and the push rod (613) is located above the side plate (610).

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