Plastic profile cutting machine

Abstract

The utility model discloses a kind of plastic section bar cutting machines, comprising: rack, moving mechanism, workstation, cutting component, pressing structure and tensioning device, the moving mechanism is arranged on the rack;The workstation is movably installed on the rack by the moving mechanism, profile conveying passage parallel with the moving direction of the moving mechanism is equipped on the workstation;The cutting component is installed on the workstation, the cutting component is equipped with cutting tool, the cutting component is suitable for driving the cutting tool moves along vertical direction to cut the profile on the profile conveying passage;The pressing structure is arranged on the workstation, and the pressing structure includes at least one pressing block, and the pressing block is suitable for moving downward to compress the profile in the profile conveying passage. The utility model can adapt to different specifications profile, realize cutting position adjustment, compression and moderate stretching, improve cutting precision and efficiency.

Description

Technical Field

[0001] This utility model relates to a plastic profile cutting machine. Background Technology

[0002] In the production of plastic profiles, the cutting process significantly impacts product dimensional accuracy and cross-sectional quality. Its primary function is to precisely cut the extruded thermoplastic profiles to specific lengths, ensuring a smooth, burr-free cut to meet the requirements of subsequent processing and product quality. However, traditional rotary cutting equipment struggles to achieve ideal chip-free cutting when processing engineering plastics such as PC and ABS. Due to the unique physical properties of these materials, it often generates substantial amounts of debris and dust, resulting in uneven cuts and a tendency for fuzzy textures, affecting product appearance and assembly precision. Furthermore, the lack of effective tensile support during cutting allows the material to deform or shift during the cutting process, further exacerbating cut quality issues.

[0003] After searching the existing technology, Chinese patent CN215149653U was found to disclose a plastic profile cutting machine with a debris collection function. This patent can cut plastic profiles and collect debris, but its worktable position is relatively fixed and the cutting position is not adjustable, making it difficult to adapt to the cutting needs of different profile specifications. At the same time, it was found in use that the profile is prone to displacement when it is only clamped during the cutting process, resulting in poor cutting quality and affecting subsequent processing and use. Summary of the Invention

[0004] The technical problem to be solved by this utility model is to overcome the defects of the prior art and provide a plastic profile cutting machine that can adapt to different specifications of profiles, realize the adjustment of cutting position, clamping and moderate stretching, and improve cutting accuracy and efficiency.

[0005] To solve the above-mentioned technical problems, the technical solution of this utility model is: a plastic profile cutting machine, comprising:

[0006] frame;

[0007] A moving mechanism, which is mounted on the frame;

[0008] A workbench is movably mounted on the frame via the moving mechanism, and the workbench is provided with a profile conveying channel parallel to the moving direction of the moving mechanism;

[0009] A cutting component is mounted on the worktable and is equipped with a cutting tool. The cutting component is adapted to drive the cutting tool to move in a vertical direction to cut the profile located on the profile conveying channel.

[0010] A clamping structure is disposed on the worktable, the clamping structure including at least one clamping block, the clamping block being adapted to move downward to clamp a profile located in the profile conveying channel;

[0011] The tensioning device is disposed on the worktable and includes at least one abutment roller and a corresponding drive mechanism. The abutment roller is rotatably mounted below the worktable, and the upper part of the abutment roller is adapted to pass through an opening on the worktable and contact the bottom surface of the profile. The drive mechanism is mounted on the worktable and is drively connected to the abutment roller. The drive mechanism is adapted to drive the abutment roller to rotate to tension the profile when the clamping block clamps the profile.

[0012] Furthermore, a specific structure of a moving mechanism is provided, the moving mechanism comprising:

[0013] A pair of guide rails, which are mounted parallel to each other on the frame;

[0014] A guide rack, which is mounted on the frame and positioned between a pair of guide rails;

[0015] A guide wheel is mounted on the bottom of the worktable and slides in conjunction with the guide rail.

[0016] A drive source, which is fixed on the worktable and has an output terminal;

[0017] A drive gear, which is mounted on the output end of the drive source;

[0018] The drive gear meshes with the guide rack, and the drive source is adapted to drive the worktable to move along the guide rail through the meshing of the drive gear and the guide rack.

[0019] Furthermore, the plastic profile cutting machine also includes a movable limiting abutment block, which is disposed on the frame and is adapted to abut against the worktable to limit the movement range of the worktable on the movable mechanism.

[0020] Furthermore, a specific structure for a cutting component is provided, wherein the worktable is provided with a clearance groove corresponding to the moving path of the cutting tool;

[0021] The cutting component includes:

[0022] A transverse guide rail is fixedly mounted on the worktable;

[0023] Mounting block, which is slidably mounted on the transverse guide rail by means of a slider;

[0024] A linear drive mechanism is mounted on the worktable and is adapted to drive the mounting block to move along the transverse guide rail;

[0025] A vertical slider, which is slidably mounted on the mounting block;

[0026] A telescopic drive mechanism is mounted on the mounting block, and the telescopic end of the telescopic drive mechanism is connected to the vertical slider. The telescopic drive mechanism is adapted to drive the vertical slider to move up and down.

[0027] The cutting tool is mounted at the lower end of the vertical slider.

[0028] Furthermore, a specific structure for a clamping structure is provided, the clamping structure comprising:

[0029] At least one pair of telescopic mechanisms, which are vertically mounted above the worktable;

[0030] The clamping block is installed at the telescopic end of the telescopic mechanism, and the clamping block is adapted to clamp or release the profile through the telescopic movement of the telescopic mechanism.

[0031] Furthermore, the workbench is provided with a through slot, and the upper part of the abutment roller extends through the through slot into the profile conveying channel;

[0032] The drive mechanism includes:

[0033] A support frame is mounted on the bottom of the workbench;

[0034] A telescopic source, one end of which is hinged to the support frame, and the telescopic source is provided with a telescopic rod;

[0035] A connecting rod, one end of which is hinged to the end of the telescopic rod of the telescopic source, and the other end is fixedly connected to the shaft of the abutment roller;

[0036] The telescopic source is adapted to drive the abutment roller to reciprocate through the connecting rod.

[0037] Furthermore, in order to limit the left and right movement, guide grooves are provided on both sides of the profile conveying channel on the worktable;

[0038] It also includes a side limiting mechanism, which comprises:

[0039] At least one pair of guide rollers are provided, each guide roller being rotatably mounted in a guide groove on both sides, the guide rollers being adapted to roll contact with the side of the profile passing through.

[0040] Furthermore, the plastic profile cutting machine also includes an operating table, which is fixedly installed on one side of the machine frame.

[0041] By adopting the above technical solution, this utility model has the following beneficial effects:

[0042] In this invention, during operation, the profile is conveyed through the profile conveying channel. When the profile reaches the cutting position, the clamping block of the clamping structure moves downward to press the profile into the profile conveying channel. At the same time, the abutment roller of the tensioning device passes through the opening on the worktable and contacts the bottom surface of the profile. The drive mechanism drives the abutment roller to rotate. Through the friction between the abutment roller and the bottom surface of the profile, the profile is tensioned, keeping it taut under the combined action of the clamping block and the abutment roller. At this time, the cutting component drives the cutting tool to move vertically to cut the profile. Because the profile is clamped and fixed by the clamping block and tensioned by the abutment roller during the cutting process, the profile will not shift or vibrate. The cut surface is flat and burr-free. At the same time, the entire worktable can be moved on the frame through the moving mechanism, which can adjust the cutting position according to different specifications of profiles. This solves the problems of unstable profile conveying, easy profile shifting during cutting, and poor cut surface quality due to lack of tensioning mechanism in the prior art.

[0043] In summary, this utility model achieves stable positioning, appropriate tension, and cutting of profiles, resulting in a smooth cut surface. It is suitable for processing plastic profiles of different specifications and meets market requirements for product quality. Attached Figure Description

[0044] Figure 1 This is a three-dimensional structural diagram of the plastic profile cutting machine of this utility model. Figure 1 ;

[0045] Figure 2 for Figure 1 A magnified view of part A in the image;

[0046] Figure 3 This is a three-dimensional structural diagram of the plastic profile cutting machine of this utility model. Figure 2 ;

[0047] Figure 4 This is a three-dimensional structural diagram of the plastic profile cutting machine of this utility model. Figure 3 ;

[0048] Figure 5 This is a three-dimensional structural diagram of the plastic profile cutting machine of this utility model. Figure 4 ;

[0049] Figure 6 This is a three-dimensional structural diagram of the plastic profile cutting machine of this utility model. Figure 5 . Detailed Implementation

[0050] To make the content of this utility model easier to understand, the present utility model will be further described in detail below with reference to specific embodiments and accompanying drawings.

[0051] like Figure 1-6 As shown, a plastic profile cutting machine includes:

[0052] Rack 1;

[0053] Moving mechanism 2 is mounted on frame 1;

[0054] Workbench 3 is movably mounted on frame 1 via moving mechanism 2. Workbench 3 is provided with profile conveying channel parallel to the moving direction of moving mechanism 2.

[0055] Cutting component 4 is mounted on workbench 3 and is equipped with a cutting tool (not shown in the figure). Cutting component 4 is adapted to drive the cutting tool to move in a vertical direction to cut the profile located on the profile conveying channel.

[0056] A clamping structure 5 is provided on the workbench 3. The clamping structure 5 includes at least one clamping block 51, which is adapted to move downward to clamp the profile located in the profile conveying channel.

[0057] Tensioning device 6 is disposed on workbench 3. Tensioning device 6 includes at least one abutment roller 61 and a corresponding drive mechanism 62. The abutment roller 61 is rotatably mounted below workbench 3. The upper part of the abutment roller 61 is adapted to pass through an opening on workbench 3 and contact the bottom surface of the profile. The drive mechanism 62 is mounted on workbench 3 and is connected to the abutment roller 61 for transmission. The drive mechanism 62 is adapted to drive the abutment roller 61 to rotate to tension the profile when the clamping block 51 clamps the profile.

[0058] In this embodiment, as Figure 1 , Figure 4 , Figure 5 and Figure 6As shown, during operation, the profile is conveyed through the profile conveying channel. When the profile reaches the cutting position, the pressing block 51 of the pressing structure 5 moves downward to press the profile into the profile conveying channel. At the same time, the abutting roller 61 of the tensioning device 6 passes through the opening on the worktable 3 and contacts the bottom surface of the profile. The driving mechanism 62 drives the abutting roller 61 to rotate. The friction between the abutting roller 61 and the bottom surface of the profile generates a tensioning effect on the profile, so that the profile is kept taut under the combined action of the pressing block 51 and the abutting roller 61. At this time, the cutting component 4 drives the cutting tool to move in the vertical direction to cut the profile. Since the profile is pressed and fixed by the pressing block 51 and tensioned by the abutting roller 61 during the cutting process, the profile will not shift or vibrate. The cut surface is flat and burr-free. At the same time, the entire worktable 3 can move on the frame 1 through the moving mechanism 2, which can adjust the cutting position according to different specifications of profiles. It can also be used for synchronous cutting with the production line.

[0059] Specifically, such as Figure 1 , Figure 2 and Figure 5 As shown, the moving mechanism 2 includes:

[0060] A pair of guide rails 21 are mounted parallel to each other on the frame 1;

[0061] Guide rack 22 is mounted on frame 1 and located between a pair of guide rails 21;

[0062] Guide wheel 23 is installed at the bottom of worktable 3 and slides with guide rail 21;

[0063] The drive source 24 is fixed on the worktable 3 and has an output end.

[0064] The drive gear is mounted on the output end of the drive source 24;

[0065] The drive gear meshes with the guide rack 22, and the drive source 24 is adapted to drive the worktable 3 to move along the guide rail 21 through the meshing transmission of the drive gear and the guide rack 22.

[0066] Specifically, such as Figure 1 and Figure 5 As shown, the plastic profile cutting machine also includes a movable limiting abutment block 7, which is disposed on the frame 1 and is adapted to abut against the worktable 3 to limit the movement range of the worktable 3 on the moving mechanism 2.

[0067] In this embodiment, as Figure 1 , Figure 2 and Figure 5As shown, guide wheels 23 are installed at the four corners of the bottom of the worktable 3. Each guide wheel 23 is connected to the worktable 3 via an axle. The grooved portion of the guide wheel 23 engages with the protruding portion of the guide rail 21, ensuring that the worktable 3 maintains a predetermined path when moving along the extension direction of the guide rail 21. Additionally, there are auxiliary limit wheels, which are positioned vertically opposite to the guide wheels 23. The auxiliary limit wheels are rotatably mounted on the bottom of the worktable 3 and engage with the guide wheels 23 to hold the guide rail 21 of the frame. In this embodiment, the drive source 24 is a servo motor, which is fixedly mounted at the center of the bottom of the worktable 3 via a motor mount. A drive gear is connected to the output shaft of the servo motor via a key. The teeth of the drive gear mesh with the teeth of the guide rack 22. When the servo motor rotates, the drive gear rotates accordingly and moves along the guide rack 22, thereby driving the worktable 3 to move linearly along the guide rail 21. In other embodiments, the drive source 24 can also be a stepper motor, a hydraulic motor, or a combination of a motor and a reducer.

[0068] The contact surface of the moving limit block 7 is provided with a buffer pad. When the worktable 3 moves to the end of its stroke, the corresponding end face of the worktable 3 contacts the corresponding moving limit block 7 to prevent the worktable 3 from exceeding the predetermined movement range.

[0069] Specifically, such as Figure 1 and Figure 3 As shown, the worktable 3 is provided with a clearance groove corresponding to the movement path of the cutting tool;

[0070] Cutting component 4 includes:

[0071] The transverse guide rail 42 is fixedly installed on the worktable 3.

[0072] Mounting block 43 is slidably mounted on transverse guide rail 42 via a slider;

[0073] A linear drive mechanism (not shown in the figure) is mounted on the worktable 3 and is adapted to drive the mounting block 43 to move along the transverse guide rail 42.

[0074] Vertical slider 46 is mounted on mounting block 43 and can slide up and down.

[0075] Telescopic drive mechanism 47 is mounted on mounting block 43. The telescopic end of telescopic drive mechanism 47 is connected to vertical slider 46. Telescopic drive mechanism 47 is adapted to drive vertical slider 46 to move up and down.

[0076] The cutting tool is installed at the lower end of the vertical slider 46.

[0077] In this embodiment, as Figure 1 and Figure 3As shown, the clearance groove is located in the middle of the profile conveying channel. The clearance groove is a rectangular opening, wider than the thickness of the cutting tool, and its depth penetrates the bottom surface of the worktable 3. During the cutting process, the cutting tool can pass through the clearance groove to completely cut the profile. The transverse guide rail 42 consists of two parallel linear guide rails, which are fixed to the upper surface of the worktable 3 by bolts. The bottom of the mounting block 43 is equipped with four linear bearing sliders. The sliders cooperate with the transverse guide rail 42, so that the mounting block 43 moves linearly along the transverse guide rail 42.

[0078] In this embodiment, the linear drive mechanism is a ball screw transmission mechanism, including a screw, a screw nut, and a screw motor. The screw is supported on the worktable 3 by a bearing seat, the screw nut is fixed to the bottom of the mounting block 43, and the screw motor is connected to the screw through a coupling. When the screw motor rotates, the screw drives the screw nut to move axially, thereby driving the mounting block 43 to move along the transverse guide rail 42. In this embodiment, the telescopic drive mechanism 47 is a cylinder. The cylinder body is fixed to the mounting block 43 by a bracket, and the piston rod end of the cylinder is connected to the upper end of the vertical slider 46. The vertical slider 46 slides with the mounting block 43 through a vertical guide groove, thereby driving the vertical slider 46 to move up and down vertically. In other embodiments, the linear drive mechanism can also be a gear and rack transmission mechanism or a synchronous belt transmission mechanism, and the telescopic drive mechanism 47 can also be a hydraulic cylinder or an electric push rod.

[0079] The cutting tool consists of multiple inclined blades installed at the lower end of the vertical slider 46. During operation, the lead screw motor first drives the mounting block 43 to move to the cutting start position, and then the cylinder pushes the vertical slider 46 downward to make the blades cut into the profile. After the cutting is completed, the cylinder drives the vertical slider 46 to rise and reset, and the lead screw motor then drives the mounting block 43 to move to the next cutting position or the standby position.

[0080] Specifically, such as Figure 4 and Figure 5 As shown, the clamping structure 5 includes:

[0081] Two pairs of telescopic mechanisms 52 are vertically installed above the workbench 3;

[0082] Two clamping blocks 51 are installed at the telescopic ends of corresponding telescopic mechanisms 52. The clamping blocks 51 are adapted to clamp or release the profile through the telescopic action of the telescopic mechanism 52.

[0083] Specifically, such as Figure 1-2 As shown, the workbench 3 is provided with a through slot, and the upper part of the abutment roller 61 extends through the through slot into the profile conveying channel.

[0084] The drive mechanism 62 includes:

[0085] Support frame 621, which is installed at the bottom of workbench 3;

[0086] Telescopic source 622, one end of telescopic source 622 is hinged to support frame 621, telescopic source 622 is provided with telescopic rod;

[0087] Link 623, one end of which is hinged to the end of the telescopic rod of telescopic source 622, and the other end is fixedly connected to the shaft of abutment roller 61;

[0088] The telescopic source 622 is adapted to drive the abutment roller 61 to reciprocate through the connecting rod 623.

[0089] In this embodiment, as Figure 1 and Figure 5 As shown, in this embodiment, the telescopic mechanism 52 consists of two pairs of cylinders. Each pair of cylinders is fixed to both sides of the upper surface of the workbench 3 via mounting brackets, located above the profile conveying channel. The piston rods of the cylinders extend vertically downwards. The clamping block 51 is a rectangular pressure plate. The upper surface of the pressure plate is threaded to the end of the cylinder piston rod. The lower surface of the pressure plate is provided with a rubber pad. When the rubber pad contacts the upper surface of the profile, it generates friction and prevents damage to the profile surface. During operation, the cylinder is supplied with compressed air through an air source. The piston rod extends downwards, causing the clamping block 51 to descend. The clamping block 51 presses against the upper surface of the profile, fixing the profile within the profile conveying channel. After cutting, the cylinder exhausts air, causing the piston rod to retract, and the clamping block 51 rises to release the profile. In other embodiments, the telescopic mechanism 52 can also be a hydraulic cylinder or an electric push rod, and the number of clamping blocks 51 can be set to three or four depending on the profile width.

[0090] A through slot is located at the bottom of the profile conveying channel, and the through slot is an elongated opening. The abutment roller 61 is a rubber roller, rotatably mounted below the worktable 3 via a bearing seat. The axis of the abutment roller 61 is parallel to the length direction of the through slot, and the upper circumferential surface of the abutment roller 61 protrudes through the through slot into the profile conveying channel, contacting the bottom surface of the profile. The support frame 621 is an L-shaped bracket, fixed to the bottom surface of the worktable 3 by bolts. In this embodiment, the telescopic source 622 is a small cylinder, with the cylinder body hinged to the support frame 621. One end of the connecting rod 623 is hinged to the end of the cylinder piston rod, and the other end is fixed to the shaft end of the abutment roller 61.

[0091] After the clamping block 51 clamps the profile, the piston rod of the telescopic source 622 retracts, and the linear motion is converted into the rotation of the abutment roller 61 through the connecting rod 623. The abutment roller 61 rotates at a certain angle while in contact with the bottom surface of the profile, and applies tension to the profile along the conveying direction through friction, so that the profile remains taut during the cutting process.

[0092] Specifically, such as Figure 1 and Figure 5As shown, guide grooves 33 are provided on both sides of the profile conveying channel on the workbench 3;

[0093] The plastic profile cutting machine also includes a side limiting mechanism, which includes:

[0094] Two pairs of guide rollers 81 are rotatably mounted in guide grooves 33 on both sides, and the guide rollers 81 are adapted to roll contact with the side of the profile passing through.

[0095] In this embodiment, as Figure 1 and Figure 5 As shown, a roller bracket is installed on the guide roller 81, and the roller bracket is provided with threaded holes. The guide roller 81 is fixed on the worktable 3 by fastening bolts passing through the guide groove 33.

[0096] Specifically, such as Figure 1 As shown, the plastic profile cutting machine also includes an operating table 9, which is fixedly installed on one side of the frame 1.

[0097] In this embodiment, as Figure 1 , Figure 2 , Figure 3 , Figure 5 and Figure 6 As shown, the working principle of this utility model is as follows: The operator first adjusts the spacing of the guide rollers 81 according to the specifications of the plastic profile to be cut. By loosening the fastening bolts of the roller bracket, the position of the roller bracket within the guide groove 33 is moved so that the distance between the guide rollers 81 on both sides matches the width of the profile. After adjustment, the fastening bolts are tightened. Then, the profile is fed in from the inlet end of the profile conveying channel. The two sides of the profile contact the guide rollers 81, and the bottom surface of the profile is placed on the profile conveying channel. At this time, the upper circumferential surface of the abutment roller 61 contacts the bottom surface of the profile.

[0098] The drive source 24 is activated, and the drive gear meshes with the guide rack 22, moving the worktable 3 along the guide rail 21 to the predetermined cutting position. Once the worktable 3 reaches the target position, the drive source 24 stops operating. Air enters the cylinder of the telescopic mechanism 52, the piston rod extends downwards, and the clamping block 51 descends and presses against the upper surface of the profile, fixing the profile within the profile conveying channel. After the clamping block 51 clamps the profile, the telescopic source 622 begins operation. The piston rod extends and retracts, driving the abutment roller 61 to rotate at a certain angle via the connecting rod 623. The abutment roller 61 applies tension to the profile along the conveying direction through frictional contact with the bottom surface of the profile.

[0099] With the profile compressed and tensioned, the lead screw motor rotates, causing the mounting block 43 to move along the transverse guide rail 42 to the cutting start position. The cylinder of the telescopic drive mechanism 47 pushes the vertical slider 46 downward, and the cutting tool passes through the clearance groove and cuts into the profile. After cutting is completed, the cylinder of the telescopic drive mechanism 47 retracts, the vertical slider 46 drives the cutting tool to rise to the initial height, and the lead screw motor reverses to reset the mounting block 43.

[0100] After the cutting operation is completed, the telescopic source 622 stops working, the abutment roller 61 stops rotating, the cylinder of the telescopic mechanism 52 exhausts air, and the clamping block 51 rises to release the profile. The operator removes the cut profile segment and continues to push or remove the remaining profile. If cutting needs to continue, the drive source 24 restarts, moving the worktable 3 to the next cutting position and repeating the above cutting process. When the worktable 3 moves to the end of its stroke and approaches the movement limit abutment block 7, the worktable 3 stops moving after contacting the buffer pad of the movement limit abutment block 7 to prevent exceeding the movement range.

[0101] The specific embodiments described above further illustrate the technical problems, technical solutions, and beneficial effects of this utility model. It should be understood that the above descriptions are merely specific embodiments of this utility model and are not intended to limit this utility model. 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. A plastic profile cutting machine, characterized in that, include: Rack (1); A moving mechanism (2) is mounted on the frame (1); Workbench (3), the workbench (3) is movably mounted on the frame (1) via the moving mechanism (2), and the workbench (3) is provided with a profile conveying channel parallel to the moving direction of the moving mechanism (2); A cutting component (4) is mounted on the worktable (3). The cutting component (4) is provided with a cutting tool. The cutting component (4) is adapted to drive the cutting tool to move in a vertical direction to cut the profile located on the profile conveying channel. A clamping structure (5) is provided on the workbench (3). The clamping structure (5) includes at least one clamping block (51), which is adapted to move downward to clamp the profile located in the profile conveying channel. Tensioning device (6), the tensioning device (6) is disposed on the worktable (3), the tensioning device (6) includes at least one abutment roller (61) and a corresponding drive mechanism (62), the abutment roller (61) is rotatably mounted below the worktable (3), the upper part of the abutment roller (61) is adapted to pass through the opening on the worktable (3) and contact the bottom surface of the profile, the drive mechanism (62) is mounted on the worktable (3) and is drively connected to the abutment roller (61), the drive mechanism (62) is adapted to drive the abutment roller (61) to rotate to generate tension on the profile when the pressing block (51) presses the profile.

2. The plastic profile cutting machine according to claim 1, characterized in that: The moving mechanism (2) includes: A pair of guide rails (21) are mounted parallel to each other on the frame (1); A guide rack (22) is mounted on the frame (1) and located between a pair of guide rails (21); Guide wheel (23), the guide wheel (23) is installed at the bottom of the worktable (3), and the guide wheel (23) slides in cooperation with the guide rail (21); A drive source (24) is fixed on the workbench (3) and has an output end; A drive gear is mounted on the output end of the drive source (24); The drive gear meshes with the guide rack (22), and the drive source (24) is adapted to drive the worktable (3) to move along the guide rail (21) through the meshing transmission of the drive gear and the guide rack (22).

3. The plastic profile cutting machine according to claim 1, characterized in that: It also includes a moving limit abutment block (7), which is disposed on the frame (1) and is adapted to abut against the worktable (3) to limit the range of movement of the worktable (3) on the moving mechanism (2).

4. The plastic profile cutting machine according to claim 1, characterized in that: The workbench (3) is provided with a clearance groove corresponding to the moving path of the cutting tool; The cutting component (4) includes: A transverse guide rail (42) is fixedly installed on the worktable (3); Mounting block (43), which is slidably mounted on the transverse guide rail (42) by means of a slider; A linear drive mechanism is mounted on the worktable (3) and is adapted to drive the mounting block (43) to move along the transverse guide rail (42); A vertical slider (46) is slidably mounted on the mounting block (43); Telescopic drive mechanism (47) is mounted on the mounting block (43). The telescopic end of the telescopic drive mechanism (47) is connected to the vertical slider (46). The telescopic drive mechanism (47) is adapted to drive the vertical slider (46) to move up and down. The cutting tool is installed at the lower end of the vertical slider (46).

5. The plastic profile cutting machine according to claim 1, characterized in that: The clamping structure (5) includes: At least one pair of telescopic mechanisms (52) are provided, which are vertically mounted above the worktable (3); The clamping block (51) is installed at the telescopic end of the telescopic mechanism (52), and the clamping block (51) is adapted to clamp or release the profile through the telescopic action of the telescopic mechanism (52).

6. The plastic profile cutting machine according to claim 1, characterized in that: The workbench (3) is provided with a through slot, and the upper part of the abutting roller (61) extends through the through slot into the profile conveying channel; The drive mechanism (62) includes: A support frame (621) is installed at the bottom of the workbench (3); Telescopic source (622), one end of which is hinged to the support frame (621), and the telescopic source (622) is provided with a telescopic rod; Link (623), one end of which is hinged to the telescopic rod end of the telescopic source (622), and the other end is fixedly connected to the shaft of the abutment roller (61); The telescopic source (622) is adapted to drive the abutment roller (61) to reciprocate through the connecting rod (623).

7. The plastic profile cutting machine according to claim 1, characterized in that: On the workbench (3), guide grooves (33) are provided on both sides of the profile conveying channel. It also includes a side limiting mechanism, which comprises: At least one pair of guide rollers (81) are rotatably mounted in the guide grooves (33) on both sides, and the guide rollers (81) are adapted to roll contact with the side of the profile passing through.

8. The plastic profile cutting machine according to claim 1, characterized in that: It also includes an operating table (9), which is fixedly installed on one side of the frame (1).

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