Continuous cutting mechanism for plastic workpieces

Abstract

The utility model relates to the technical field of cutting devices, in particular to a plastic workpiece continuous cutting mechanism which comprises a cutter head, a rotating shaft is arranged in the middle of the cutter head, a cutting tool is coaxially installed on the rotating shaft, the cutting tool is attached to the end face of the cutter head, a balancing weight is arranged on the rotating shaft in a clamped and sliding mode, and a spring is arranged between the balancing weight and the cutting tool. A moving structure used for pushing the balancing weight is arranged on the rotating shaft in a matched mode. The cutting-off force of the cutting-off tool can be effectively increased, meanwhile, the effect of self-compensating the abrasion loss of the side face of the cutting-off tool can be achieved, the working efficiency and the product quality are effectively improved, and the service life of the cutting-off tool is effectively prolonged.

Description

Technical Field

[0001] The utility model relates to the technical field of cutting devices, in particular to a plastic workpiece continuous cutting mechanism. Background Art

[0002] Because plastic products have a certain hardness, the cutter will wear out and need to be replaced frequently. At the same time, the elasticity will produce resistance, hindering the one-time cutting and forming. Long-term use will increase the wear of the cutter edge and the cutter shaft, affecting the shape of the product cut and the continuous use of the equipment. The side of the cutter is in contact with the cutter disc for a long time, which is also prone to wear and tear, causing the cutter to shake.

[0003] Therefore, we propose a plastic workpiece continuous cutting mechanism to solve the above problems. Utility Model Content

[0004] The utility model aims to solve the shortcomings in the prior art and proposes a plastic workpiece continuous cutting mechanism.

[0005] In order to achieve the above purpose, the utility model adopts the following technical solutions:

[0006] A plastic workpiece continuous cutting mechanism comprises a cutter disc, a rotating shaft is provided in the middle of the cutter disc, a cutting knife is coaxially mounted on the rotating shaft, the cutting knife is fitted with the end face of the cutter disc, a counterweight block is provided for sliding engagement with the rotating shaft, a spring is provided between the counterweight block and the cutting knife, and a movable structure for pushing the counterweight block is matched on the rotating shaft.

[0007] Preferably, the cutter disc is circumferentially provided with a plurality of holes for passing the plastic workpiece.

[0008] Preferably, the spring is sleeved on the rotating shaft, and two ends of the spring are respectively abutted and matched with the counterweight block and the cutting knife.

[0009] Preferably, the counterweight block is coaxially mounted with a bearing, and one end of the spring is coaxially fixedly connected to the bearing.

[0010] Preferably, the rotating shaft is coaxially clamped and slidably provided with a ring block, the ring block is provided with a support block, the support block abuts against the cutting knife, and one end of the spring abuts against the ring block.

[0011] Preferably, the moving structure comprises a first nut, and one end of the rotating shaft is provided with a thread matching the thread of the first nut.

[0012] Preferably, the moving structure comprises a rotating block, a second nut is coaxially fixed to a side of the rotating block, a thread is provided at one end of the rotating shaft, and the rotating block and the second nut are both threadedly sleeved on the thread.

[0013] Compared with the prior art, the beneficial effects of the utility model are:

[0014] The utility model provides a counterweight block integrated with the cutting knife, and the centrifugal force of the counterweight block rotation can effectively increase the cutting force of the cutting knife, thereby effectively improving work efficiency and product quality. At the same time, by adding a spring and a moving mechanism that pushes the counterweight block, the spring can be compressed by pushing the counterweight block, thereby achieving the effect of pressing the cutting knife, and self-compensating for the side wear of the cutting knife, thereby increasing the service life of the cutting knife. In addition, holes of different sizes are configured to adapt to the cutting of plastic workpieces of different external sizes. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] In order to more clearly illustrate the technical solutions in the embodiments of the utility model or the prior art, the drawings required for use in the embodiments or the prior art description are briefly introduced below. Obviously, for ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0016] Figure 1 This is a schematic structural diagram of the first embodiment of the present utility model;

[0017] Figure 2 It is a cross-sectional view of the cutter disc of the utility model;

[0018] Figure 3 It is a structural schematic diagram of the ring block and the support block of the utility model;

[0019] Figure 4 It is a structural schematic diagram of the bearing and spring of the utility model;

[0020] Figure 5 This is a schematic structural diagram of the second embodiment of the present utility model.

[0021] In the figure: 1, cutter disc; 2, rotating shaft; 3, cutting knife; 4, counterweight block; 5, spring; 6, hole; 7, bearing; 8, ring block; 9, support block; 10, first nut; 11, rotating block; 12, second nut. DETAILED DESCRIPTION

[0022] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0023] In the description of the present invention, it should be understood that terms such as "opening", "upper", "lower", "thickness", "top", "middle", "length", "inside", "all around" and the like indicating orientation or positional relationship are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the components or elements referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as limiting the present invention.

[0024] Embodiment 1

[0025] Reference Figure 1-4 A plastic workpiece continuous cutting mechanism includes a cutter disc 1, which is supported and installed by an existing machine platform, and can be rotated and adjusted. A rotating shaft 2 is provided in the middle of the cutter disc 1, and a cutting knife 3 is coaxially installed on the rotating shaft 2, that is, the cutting knife 3 is key-connected with the rotating shaft 2. The cutting knife 3 fits the end surface of the cutter disc 1, and a counterweight block 4 is provided on the rotating shaft 2 for sliding engagement, and a spring 5 is provided between the counterweight block 4 and the cutting knife 3, and a movable structure for pushing the counterweight block 4 is matched on the rotating shaft 2.

[0026] For the above example, those skilled in the art should know that when implementing the above technical solution, the rotating shaft 2 is driven by the existing drive system, that is, the servo motor and the related linkage device drive its rotation, and the servo motor and the related linkage device are both installed and set with the existing machine.

[0027] For the above examples, those skilled in the art should know that when implementing the above technical solution, the cutting blade 3 is made of wear-resistant steel material, such as high-speed steel, alloy steel, etc. The cutting blade 3 can be designed into various shapes such as rectangle and triangle.

[0028] As a technical optimization solution of the utility model, the cutter disc 1 is surrounded by a plurality of holes 6 for passing a plastic workpiece. The plastic workpiece is a plastic workpiece to be cut, such as a plastic pipe. The plurality of holes 6 can be divided into multiple groups, such as a single hole 6 as a group, and a plurality of holes 6 as a group.

[0029] For the above example, those skilled in the art should know that when implementing the above technical solution, the aperture of the hole 6 matches the outer diameter of the plastic workpiece, and generally a gap of 0.3-0.5 mm is maintained to prevent the plastic workpiece from moving in the hole.

[0030] For the above examples, those skilled in the art should know that when implementing the above technical solution, the sizes of the holes 6 may be different, and positioning blocks with different inner diameters may be arranged in the holes to adapt to the cutting of plastic workpieces with different external dimensions.

[0031] For the above example, those skilled in the art should know that when implementing the above technical solution, the plastic workpiece is pulled and transported by an existing conveying device and passes through the hole 6 .

[0032] As a technical optimization solution of the utility model, the spring 5 is sleeved on the rotating shaft 2, and the two ends of the spring 5 are respectively matched with the counterweight block 4 and the cutting knife 3. The spring 5 does not contact the rotating shaft 2.

[0033] As a technical optimization solution of the utility model, the counterweight 4 is coaxially mounted with a bearing 7, and one end of the spring 5 is coaxially fixedly connected with the bearing 7. The spring 5 is arranged through the bearing 7, so that the counterweight 4 can push the compression spring 5 smoothly.

[0034] As a technical optimization solution of the utility model, the rotating shaft 2 is coaxially clamped and slidably provided with a ring block 8, and the ring block 8 is provided with a support block 9, and the support block 9 abuts against the cutting knife 3, and one end of the spring 5 abuts against the ring block 8. When the spring 5 is adjusted to be compressed, it acts on the ring block 8, and finally the cutting knife 3 can be abutted by the support block 9, so that the cutting knife 3 can be kept in contact with the end surface of the cutter disc 1. That is, the ring block 8 pushes the cutting knife 3 to bend, so that the cutting knife 3 is in contact with the surface of the cutter disc 1.

[0035] As a technical optimization solution of the utility model, the moving structure includes a first nut 10, and one end of the rotating shaft 2 is provided with a thread matching the thread of the first nut 10, and the first nut 10 has screw-in and self-locking functions.

[0036] Here’s how it works:

[0037] After the plastic workpiece is manufactured, it is pulled and continuously passes through the corresponding hole 6. The driving system drives the rotating shaft 2 to rotate, and the rotating shaft 2 drives the cutting knife 3 to rotate, so as to cut the plastic workpiece into a fixed length of finished product. In addition, during the rotation process, the centrifugal force of the counterweight block 4 can effectively increase the cutting force of the cutting knife 3, effectively improving the work efficiency and product quality. The cutting and forming of finished products of different lengths can be achieved by adjusting the pulling speed of the plastic workpiece and the rotating speed of the cutting knife 3. When the side of the cutting knife 3 is worn and thinned, the wear amount can be automatically compensated by the deformation of the spring 5, so that the cutting knife 3 is close to the end face of the cutter disc 1 again, which effectively increases the service life of the cutting knife 3. That is, the counterweight block 4 is driven to move inward by screwing in the first nut 10, and then the spring 5 is compressed to make the cutting knife 3 close to the end face of the cutter disc 1, that is, the cutting knife 3 is pressed. The first nut 10 can be screwed in by a corresponding wrench.

[0038] Embodiment 2

[0039] like Figure 5 , this embodiment is different from the first embodiment in that:

[0040] The moving structure includes a rotating block 11, a second nut 12 is coaxially fixed to the side of the rotating block 11, a thread is provided at one end of the rotating shaft 2, and the rotating block 11 and the second nut 12 are both threadedly sleeved on the thread. The rotating block 11 and the second nut 12 have screw-in and self-locking functions.

[0041] Here’s how it works:

[0042] The counterweight block 4 is driven to move inward by screwing the rotating block 11 and the second nut 12, thereby compressing the spring 5 to make the cutting knife 3 close to the end surface of the cutter disc 1, that is, to press the cutting knife 3, effectively improving the service life of the cutting knife 3. The second nut 12 can be screwed in by a corresponding wrench, and the rotating block 11 is convenient for manual rotation.

[0043] The above description is only a preferred specific implementation manner of the present invention, but the protection scope of the present invention is not limited thereto. Any technician familiar with the technical field can make equivalent replacements or changes within the technical scope disclosed by the present invention according to the technical scheme and the utility model concept of the present invention, which should be covered by the protection scope of the present invention.

Claims

1. A plastic workpiece continuous cutting mechanism, comprising a cutter disc (1), characterized in that: A rotating shaft (2) is provided in the middle of the cutter disc (1), a cutting knife (3) is coaxially mounted on the rotating shaft (2), the cutting knife (3) is fitted with the end surface of the cutter disc (1), a counterweight block (4) is provided on the rotating shaft (2) for clamping and sliding, a spring (5) is provided between the counterweight block (4) and the cutting knife (3), and a movable structure for pushing the counterweight block (4) is matched on the rotating shaft (2).

2. A plastic workpiece continuous cutting mechanism according to claim 1, characterized in that: The cutter disc (1) is surrounded by a plurality of holes (6) for passing plastic workpieces.

3. A plastic workpiece continuous cutting mechanism according to claim 1, characterized in that: The spring (5) is sleeved on the rotating shaft (2), and two ends of the spring (5) are respectively abutted and matched with the counterweight block (4) and the cutting knife (3).

4. A plastic workpiece continuous cutting mechanism according to claim 1, characterized in that: The counterweight block (4) is coaxially mounted with a bearing (7), and one end of the spring (5) is coaxially fixedly connected to the bearing (7).

5. The plastic workpiece continuous cutting mechanism according to claim 1, characterized in that: The rotating shaft (2) is coaxially clamped and slidably provided with a ring block (8), the ring block (8) is provided with a support block (9), the support block (9) abuts against the cutting knife (3), and one end of the spring (5) abuts against the ring block (8).

6. A plastic workpiece continuous cutting mechanism according to claim 1, characterized in that: The moving structure comprises a first nut (10), and one end of the rotating shaft (2) is provided with a thread matching the thread of the first nut (10).

7. The plastic workpiece continuous cutting mechanism according to claim 1, characterized in that: The moving structure comprises a rotating block (11), a second nut (12) is coaxially fixed to the side of the rotating block (11), a thread is provided at one end of the rotating shaft (2), and the rotating block (11) and the second nut (12) are both threadedly sleeved on the thread.

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