An automatic cutting machine for plastic parts

Abstract

This utility model discloses an automatic plastic parts cutting machine, including a base with two height adjustment structures mounted on it. Each height adjustment structure has a lower clamping block mounted on it. A lower guide wheel is rotatably mounted on the base via a bearing seat. A reduction motor is mounted on the bearing seat of the lower guide wheel, and the output shaft of the reduction motor is connected to the rotating shaft of the lower guide wheel. A first bracket is mounted on the base, and two vertically downward-facing first hydraulic cylinders are mounted on the first bracket. An upper clamping block is mounted on the output rod of each first hydraulic cylinder. A second vertically downward-facing second hydraulic cylinder is also mounted on the first bracket, and an upper guide wheel is rotatably mounted on the output rod of the second hydraulic cylinder via a bearing seat. This automatic plastic parts cutting machine, by setting the first hydraulic cylinders to drive the upper clamping blocks to move downward, allows the upper and lower clamping blocks to cooperate in clamping the plastic parts, preventing the parts from moving or deforming during the cutting process.

Description

Technical Field

[0001] This utility model relates to the field of plastic parts production technology, specifically to an automatic cutting machine for plastic parts. Background Technology

[0002] In the production of some plastic parts, cutting is an important processing step. For example, in the production of plastic pipe fittings, the fittings usually need to be cut to the required length. For instance, the patent CN222405947U provides a plastic pipe fixed-length cutting machine. This machine uses the output end of the second electric telescopic rod to drive the cutting machine upward, thus facilitating the cutting of the pipe. However, this machine lacks pipe fixation. Therefore, when cutting some softer plastic pipes, the pipe may move and deform during the cutting process, making it difficult to ensure the stability of the fitting during cutting. This results in low cutting accuracy, uneven pipe cuts, and seriously affects product quality.

[0003] Therefore, we have designed an automatic plastic parts cutting machine to solve the above problems. Utility Model Content

[0004] The purpose of this invention is to address the shortcomings of existing technologies by providing an automatic cutting machine for plastic parts, thereby solving the problems mentioned in the background art.

[0005] To achieve the above objectives, this utility model provides the following technical solution: an automatic plastic parts cutting machine, comprising a base, on which two height adjustment structures are installed, each height adjustment structure having a lower clamping block installed, a lower guide wheel rotatably mounted on the base via a bearing seat, a reduction motor mounted on the bearing seat of the lower guide wheel, the output shaft of the reduction motor being connected to the rotating shaft of the lower guide wheel, a first bracket mounted on the base, two vertically downward-facing first hydraulic cylinders mounted on the first bracket, each first hydraulic cylinder having an upper clamping block mounted on its output rod, a vertically downward-facing second hydraulic cylinder also mounted on the first bracket, the output rod of the second hydraulic cylinder having an upper guide wheel rotatably mounted on its bearing seat, a second bracket also mounted on the base, and a cutting structure mounted on the second bracket.

[0006] As a preferred technical solution of this utility model, the height adjustment structure includes a rectangular frame, which is fixed on the base. A horizontal plate is fixed inside the rectangular frame. A vertically arranged trapezoidal screw is rotatably installed on the horizontal plate. A handwheel is installed at the bottom of the trapezoidal screw. A nut is sleeved on the trapezoidal screw. A pair of guide holes are opened at the top of the rectangular frame, and guide posts that can slide up and down are set inside the guide holes. The tops of the two guide posts are fixed to the bottom of the lower clamping block, and the bottoms of the two guide posts are fixed to the nut.

[0007] As a preferred embodiment of this utility model, the cutting structure includes a third hydraulic cylinder, which is fixed on a second bracket. A cutting machine is mounted on the output rod of the third hydraulic cylinder. Guide cylinders are provided on both sides of the third hydraulic cylinder, and the guide cylinders are fixed on the second bracket. A guide rod is provided inside the guide cylinder, and the guide rod is fixed to the outer shell of the cutting machine.

[0008] As a preferred embodiment of this utility model, pressure sensors are installed between the output rod of the first hydraulic cylinder and the upper clamping block, and between the output rod of the second hydraulic cylinder and the bearing seat of the upper guide wheel.

[0009] As a preferred embodiment of this utility model, the base is provided with a control console for controlling the operation of the machine.

[0010] As a preferred embodiment of this utility model, the two upper clamping blocks are respectively located directly above the two lower clamping blocks. The bottom of the upper clamping blocks and the top of the lower clamping blocks are provided with straight V-shaped grooves, and the inner side of the V-shaped grooves is provided with anti-slip textures.

[0011] As a preferred embodiment of this utility model, the upper guide wheel is located directly above the lower guide wheel, and both the upper and lower guide wheels are provided with circumferential V-shaped grooves, and the inner side of the V-shaped grooves is provided with anti-slip textures.

[0012] Compared with the prior art, this utility model provides an automatic cutting machine for plastic parts, which has the following advantages:

[0013] This automatic plastic parts cutting machine uses a first hydraulic cylinder to drive the upper clamping block downwards, allowing the upper and lower clamping blocks to work together to hold the plastic pipe fittings, preventing movement and deformation during cutting, ensuring stability, improving cutting accuracy, producing neat cuts, and enhancing product quality. The machine also uses a third hydraulic cylinder to drive the upper guide wheel downwards, allowing the two guide wheels to work together to clamp the plastic pipe fittings. Combined with a geared motor driving the lower guide wheel to rotate, this enables automatic feeding of the pipe fittings. Attached Figure Description

[0014] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0015] Figure 2 This is a schematic diagram of the clamping structure of this utility model;

[0016] Figure 3 This is a schematic diagram of the height adjustment structure of this utility model;

[0017] Figure 4 This is a schematic diagram of the cutting structure of this utility model.

[0018] Reference numerals: 1. Base; 2. Height adjustment structure; 201. Rectangular frame; 202. Horizontal plate; 203. Trapezoidal lead screw; 204. Handwheel; 205. Nut; 206. Guide column; 3. Lower clamping block; 4. Lower guide wheel; 5. Gear motor; 6. First bracket; 7. First hydraulic cylinder; 8. Upper clamping block; 9. Second hydraulic cylinder; 10. Upper guide wheel; 11. Second bracket; 12. Cutting structure; 1201. Third hydraulic cylinder; 1202. Cutting machine; 1203. Guide cylinder; 1204. Guide rod; 13. Pressure sensor; 14. Control console. Detailed Implementation

[0019] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. 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.

[0020] Example 1: Please refer to Figures 1-4An automatic cutting machine for plastic parts includes a base 1 with two height adjustment structures 2 fixed to its upper surface by bolts. The rectangular frame 201 of the height adjustment structure 2 is made of welded square steel. An internal horizontal plate 202 is welded to the rectangular frame 201. A trapezoidal lead screw 203 rotates with the horizontal plate 202 via bearings. A handwheel 204 is fixed to the bottom end of the trapezoidal lead screw 203. A lead screw nut 205, made of copper alloy, forms a helical transmission pair with the trapezoidal lead screw 203. A guide post 206 engages with a guide hole at the top of the rectangular frame 201. The lead screw nut 205 is fixed to the bottom end of the guide post 206. A lower clamping block 3 is fixed to the guide post 206. At the top, a first bracket 6 is welded to the upper surface of the base 1. Two first hydraulic cylinders 7 are fixed to the first bracket 6 by bolts. The first hydraulic cylinders 7 are connected to an external hydraulic control system. An upper clamping block 8 is installed on its output rod, and a pressure sensor 13 is set between the output rod and the upper clamping block 8. The first hydraulic cylinders 7 can drive the upper clamping block 8 to move downward and cooperate with the lower clamping block 3 to achieve the clamping effect on the plastic pipe fitting, thereby preventing the plastic pipe fitting from moving during the cutting process. The pressure sensor 13 on the upper clamping block 8 can monitor the pressure applied by the upper clamping block 8 to the plastic pipe body, avoiding excessive pressure that could damage the pipe body. The height adjustment structure 2 is used to adjust the height of the lower clamping block 3. Because some softer plastic pipes may sag at the end during feeding, and the degree of sag varies depending on the pipe's hardness, if the lower clamping block 3 is too high, the pipe end may be stuck, affecting feeding. If the lower clamping block 3 is too low, while it avoids the pipe end being stuck, the pipe will bend significantly when the upper clamping block 8 presses down on it. This not only affects the accuracy of the pipe feeding length but also easily pulls on the pipe, causing it to... If the component is damaged, the height adjustment structure 2 can be set to adjust the height of the lower clamping block 3 according to the hardness of the plastic pipe fitting, so as to avoid the lower clamping block 3 being too high or too low. When adjusting the height of the lower clamping block 3, the trapezoidal screw 203 is rotated by the handwheel 204, which drives the screw nut 205 to move up and down, and then drives the lower clamping block 3 to move up and down through the guide column 206, thereby realizing the height adjustment of the lower clamping block 3. The trapezoidal screw 203 and the screw nut 205 have a self-locking ability. Without rotating the handwheel 204, the lower clamping block 3 will not move down due to its own weight or pressure.

[0021] The lower guide wheel 4 is mounted on the base 1 via a bearing seat. The geared motor 5 is connected to the shaft of the lower guide wheel 4 via a coupling. The second hydraulic cylinder 9 is fixed to the first bracket 6 by bolts. The second hydraulic cylinder 9 is connected to an external hydraulic control system. The upper guide wheel 10 is mounted on its output rod via a bearing seat. The second hydraulic cylinder 9 can drive the upper guide wheel 10 to move downward, so that the upper guide wheel 10 and the lower guide wheel 4 cooperate to clamp the plastic pipe. A pressure sensor 13 is also set between the bearing seat of the upper guide wheel 10 and the output rod of the second hydraulic cylinder 9. Its function is to monitor the pressure applied by the upper guide wheel 10 to the plastic pipe and avoid excessive pressure that could damage the pipe. After the upper and lower guide wheels clamp the pipe, the geared motor 5 can drive the lower guide wheel 4 to rotate, thereby controlling the plastic pipe to move forward and realizing the function of automatic feeding.

[0022] The second bracket 11 is welded to the base 1. The third hydraulic cylinder 1201 of the cutting structure 12 is fixed to the second bracket 11 by bolts. The third hydraulic cylinder 1201 is connected to an external hydraulic control system. The housing of the cutting machine 1202 is fixed to the output rod of the third hydraulic cylinder 1201 by bolts. The guide rod 1204 and the guide cylinder 1203 form a sliding fit. The guide cylinder 1203 is fixed to the second bracket 11 by bolts, and the guide rod 1204 is fixed to the housing of the cutting machine 1202 by bolts. The third hydraulic cylinder 1201 can... The cutting machine 1202 is controlled to move horizontally, thereby realizing the cutting and pushing operations. The thickness of the disc blade of the cutting machine 1202 is less than the distance between the two lower clamping blocks 3 and the distance between the two upper clamping blocks 8. When cutting, the disc blade of the cutting machine 1202 can just pass through the distance between the two lower clamping blocks 3 and the distance between the two upper clamping blocks 8, thereby realizing the cutting operation of plastic pipe fittings. The control console 14 is set on the base 1. The control console 14 integrates a PLC controller and is connected to the hydraulic control system of each hydraulic cylinder, pressure sensor 13 and geared motor 5 through signal lines.

[0023] Example 2: Based on Example 1, this example optimizes some of the machine's structure. Straight V-grooves are formed at the bottom of the upper clamping block 8 and the top of the lower clamping block 3. Circumferential V-grooves are formed on the upper guide wheel 10 and the lower guide wheel 4. Anti-slip textures are provided on the inner side of all V-grooves. The V-grooves and anti-slip textures can limit the radial movement of the plastic pipe fittings, thereby further ensuring that the pipe fittings will not move during the cutting process. In addition, the reduction motor 5 is a servo motor, and an encoder is installed on the reduction motor 5. The encoder can accurately monitor and control parameters such as the rotation speed, direction, and number of revolutions of the lower guide wheel 4, thereby accurately controlling the feeding length of the plastic pipe fittings so as to cut the plastic pipe fittings to the required length.

[0024] Operating Procedure: Place one end of the plastic pipe fitting into the V-groove of the lower guide wheel 4. Then, control the upper guide wheel 10 to move downwards via the second hydraulic cylinder 9, clamping the pipe between the upper and lower guide wheels. Set the cutting length of the plastic pipe fitting and the parameters of the reduction motor 5 on the control panel 14. Then start the machine. The reduction motor 5 starts, driving the lower guide wheel 4 to rotate. The lower guide wheel 4 and the upper guide wheel 10 work together to control the pipe fitting to move forward until the feeding length of the pipe fitting reaches the set value. Then, the reduction motor 5 stops, and the two first hydraulic cylinders 7 start, controlling the upper clamping block 8 to move downwards. The upper and lower clamping blocks are engaged and positioned near the cutting position of the pipe fitting. Then, the cutting machine 1202 is started, and its disc blade begins to rotate at high speed. At the same time, the third hydraulic cylinder 1201 is activated, driving the cutting machine 1202 to advance. The pipe fitting is cut off by the high-speed rotating blade of the cutting machine 1202. After the pipe fitting is cut off, the third hydraulic cylinder 1201 controls the cutting machine 1202 to reset. Then, the cutting machine 1202 is turned off. Next, the first hydraulic cylinder 7 controls the upper clamping block 8 to reset, completing the cutting of the plastic pipe fitting. Then, the reduction motor 5 is started again to repeat the operation, completing the continuous cutting of the plastic pipe fitting.

[0025] Finally, it should be noted that the above description is merely a preferred embodiment of this utility model and is not intended to limit the utility model. Although the utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this utility model should be included within the protection scope of this utility model.

Claims

1. An automatic cutting machine for plastic parts, comprising a base (1), characterized in that: Two height adjustment structures (2) are installed on the base (1). Each height adjustment structure (2) is equipped with a lower clamping block (3). A lower guide wheel (4) is rotatably installed on the base (1) through a bearing seat. A reduction motor (5) is installed on the bearing seat of the lower guide wheel (4). The output shaft of the reduction motor (5) is connected to the rotating shaft of the lower guide wheel (4). A first bracket (6) is installed on the base (1). Two vertically downward-facing first hydraulic cylinders (7) are installed on the first bracket (6). An upper clamping block (8) is installed on the output rod of each first hydraulic cylinder (7). A vertically downward-facing second hydraulic cylinder (9) is also installed on the first bracket (6). An upper guide wheel (10) is rotatably installed on the output rod of the second hydraulic cylinder (9) through a bearing seat. A second bracket (11) is also installed on the base (1). A cutting structure (12) is installed on the second bracket (11).

2. The automatic cutting machine for plastic parts according to claim 1, characterized in that: The height adjustment structure (2) includes a rectangular frame (201), which is fixed on the base (1). A horizontal plate (202) is fixed inside the rectangular frame (201). A vertically arranged trapezoidal screw (203) is rotatably installed on the horizontal plate (202). A handwheel (204) is installed at the bottom of the trapezoidal screw (203). A screw nut (205) is sleeved on the trapezoidal screw (203). A pair of guide holes are opened at the top of the rectangular frame (201), and guide posts (206) that can slide up and down are set inside the guide holes. The tops of the two guide posts (206) are fixed to the bottom of the lower clamping block (3), and the bottoms of the two guide posts (206) are fixed to the screw nut (205).

3. The automatic cutting machine for plastic parts according to claim 1, characterized in that: The cutting structure (12) includes a third hydraulic cylinder (1201), which is fixed on the second bracket (11). A cutting machine (1202) is installed on the output rod of the third hydraulic cylinder (1201). Guide cylinders (1203) are provided on both sides of the third hydraulic cylinder (1201). The guide cylinders (1203) are fixed on the second bracket (11). A guide rod (1204) is provided inside the guide cylinder (1203). The guide rod (1204) is fixed to the outer shell of the cutting machine (1202).

4. The automatic cutting machine for plastic parts according to claim 1, characterized in that: Pressure sensors (13) are installed between the output rod of the first hydraulic cylinder (7) and the upper clamping block (8), and between the output rod of the second hydraulic cylinder (9) and the bearing seat of the upper guide wheel (10).

5. The automatic cutting machine for plastic parts according to claim 1, characterized in that: The base (1) is provided with a control console (14) for controlling the operation of the machine.

6. The automatic cutting machine for plastic parts according to claim 1, characterized in that: The two upper clamping blocks (8) are located directly above the two lower clamping blocks (3). The bottom of the upper clamping block (8) and the top of the lower clamping block (3) are provided with straight V-shaped grooves, and the inner side of the V-shaped grooves is provided with anti-slip textures.

7. The automatic cutting machine for plastic parts according to claim 1, characterized in that: The upper guide wheel (10) is located directly above the lower guide wheel (4). Both the upper guide wheel (10) and the lower guide wheel (4) have circumferential V-shaped grooves, and the inner side of the V-shaped grooves is provided with anti-slip textures.

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