A precision fixed-length multi-segment cutting device for two composite plastic strips

Abstract

The present invention discloses a precision fixed-length multi-segment cutting device for two composite plastic strips, which includes a frame. A ramp plate is fixedly connected to the top of the frame. An air-operated cutting group, an air-operated clamping die blank, and a traction wheel clamping and feeding mechanism are sequentially installed on the ramp plate from left to right. A movable positioning wheel group is installed on one side of the air-operated cutting group. A PLC control cabinet and an air bag are fixedly installed inside the frame. A controller is fixedly installed at the end of the frame. The controller is electrically connected to the PLC control cabinet. The air inlet end of the PLC control cabinet is connected to the air bag through an air pipe, and its air outlet end is connected to the cylinders on the air-operated cutting group, the movable positioning wheel group, the air-operated clamping die blank, and the traction wheel clamping and feeding mechanism through air pipes. The present invention can achieve automatic feeding and automatic cutting, not only with high working efficiency, but also reducing labor costs; moreover, multi-knife multi-segment simultaneous punching is adopted, which not only greatly improves the working efficiency, but also the cutting spacing is controllable, ensuring the fixed-length precision of the product.

Description

Technical Field

[0001] The present invention relates to a precision fixed-length multi-segment cutting device for two composite plastic strips, belonging to the technical field of composite plastic strip processing. Background Art

[0002] The two composite plastic strips are composite materials made of hard PP material and soft TPV, as Figure 10 shown, and are used on automotive windshield wipers to play a role in air flow guidance. In the prior art, when cutting this composite material, a thick steel plate is used as a fixed-length limit stop block, and an Airtac double-axis cylinder is used to clamp a paper cutting blade to punch the composite material. Since the manual valve of Airtac is operated manually, only one segment of the composite material can be cut each time, resulting in not only low efficiency but also a large amount of surplus material heads, leading to low material utilization rate. In addition, the length of the part is short, and high fixed-length accuracy is required (up to 0.369%). The main body of the material is soft TPV, and the part is prone to bending and deformation, which brings difficulties to precise fixed-length. Moreover, it is required that the cut end face of the product is neat and without deformation, the flatness of the product end face is required to be below 0.3 mm, and the outer surface quality is required to be clean and without scratches (no friction marks under high light). Therefore, the existing cutting method cannot meet the above requirements. Summary of the Invention

[0003] In order to solve the problems existing in the prior art, the present invention provides a precision fixed-length multi-segment cutting device for two composite plastic strips. This device can achieve precision fixed-length multi-segment cutting, greatly improving the cutting efficiency and cutting accuracy, saving the turnover and rough cutting processes, avoiding the generation of product material heads, and having a significant effect of cost reduction and efficiency increase.

[0004] The technical solution of the present invention: A precision fixed-length multi-segment cutting device for two composite plastic strips includes a frame. A ramp plate is fixedly connected to the top of the frame. An air-powered cutting group, an air-powered clamping die holder, and a traction wheel feeding mechanism are sequentially installed on the ramp plate from left to right. A movable positioning wheel group is installed on one side of the air-powered cutting group. A PLC control cabinet and an air bag are fixedly installed inside the frame. A controller is fixedly installed at the end of the frame. The controller is electrically connected to the PLC control cabinet. The air inlet end of the PLC control cabinet is connected to the air bag through an air pipe, and its air outlet end is connected to the cylinders on the air-powered cutting group, the movable positioning wheel group, the air-powered clamping die holder, and the traction wheel feeding mechanism through air pipes.

[0005] Further, the pneumatic cutting group includes a set of L-shaped support plates arranged on the ramp plate. A chute is provided on the ramp plate. A boss that is slidably engaged with the chute is provided at the bottom of the L-shaped support plate. An adjusting seat is fixedly connected to the ramp plate and located on one side of the L-shaped support plate by bolts. The adjusting seat is threadedly connected to the L-shaped support plate by an adjusting screw. A cutting cylinder is fixedly installed on each L-shaped support plate. A tool holder is fixedly connected to the telescopic rod of the cutting cylinder. A utility knife blade perpendicular to the surface of the ramp plate is fixedly installed on the tool holder.

[0006] Furthermore, a limit stop is fixedly installed at the end of the chute, and a protective cover is fixedly installed outside the utility knife blade.

[0007] Further, the movable positioning wheel group includes two columns fixedly installed on the ramp plate. Sliders are slidably connected to both columns. A cross beam is fixedly connected between the two sliders. A set of support rods is fixedly connected to the cross beam. A positioning wheel is rotatably connected to the end of each support rod. A connecting plate is fixedly connected to the center of the cross beam. A positioning cylinder is fixedly connected to the bottom of the ramp plate and corresponding to the position of the connecting plate. The telescopic rod of the positioning cylinder is fixedly connected to the connecting plate.

[0008] Further, the pneumatic clamping die includes a die base and a clamping cylinder fixed on the top of the die base. A lower die is fixedly installed at the bottom of the die base. An upper die that cooperates with the lower die is fixedly connected to the telescopic rod of the clamping cylinder.

[0009] Further, the traction wheel feeding mechanism includes a pair of guiding wheels, limiting wheels, guiding wheels, feeding wheels, and straightening wheels arranged in pairs. An L-shaped support rod is fixedly connected to the right end of the ramp plate. A support plate parallel to the ramp plate is fixedly connected to the top of the L-shaped support rod. A pair of guiding wheels and a pair of limiting wheels are rotatably connected to the support plate respectively. A guiding wheel mounting seat and a feeding wheel mounting seat are fixedly installed on the ramp plate respectively. A pair of guiding wheels are rotatably connected to the guiding wheel mounting seat. A pair of straightening wheels are rotatably connected to one end of the feeding wheel mounting seat. A feeding cylinder is fixedly installed on the top of the other end of the feeding wheel mounting seat. A movable synchronous wheel is fixedly connected to the telescopic rod of the feeding cylinder. A fixed synchronous wheel is fixedly installed at the bottom of the ramp plate and below the movable synchronous wheel. The movable synchronous wheel and the fixed synchronous wheel are connected by a synchronous belt. A pair of feeding wheels are fixedly connected to the rotating shafts of the movable synchronous wheel and the fixed synchronous wheel respectively. A feeding motor is fixedly installed at the bottom of the ramp plate and below the fixed synchronous wheel. The feeding motor is electrically connected to the controller. A driving wheel is fixedly connected to the output shaft of the feeding motor. The driving wheel and the fixed synchronous wheel are connected by a synchronous belt.

[0010] Further, a material placement rack is provided on one side of the frame close to the traction wheel feeding mechanism.

[0011] Furthermore, a lighting lamp is fixedly installed on the frame and above the ramp plate.

[0012] Due to the adoption of the above technical solution, the advantages of the present invention are:

[0013] ① The present invention can realize automatic feeding and automatic cutting, which not only has high working efficiency but also reduces labor costs;

[0014] ② The present invention adopts a utility blade for punching, and the cut section is neat and without deformation. In addition, multiple blades and multiple sections are used for punching at the same time, which not only greatly improves the work efficiency, but also makes the cutting spacing controllable, reduces the excess material head, saves material cost, and ensures the fixed length accuracy of the product;

[0015] ③ The material dropping method adopts a sloped sliding dropping method to avoid the product rolling during dropping, which will prevent the product surface from being scratched by relative movement with other objects. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 A three-dimensional diagram of a schematic structural diagram of the present invention;

[0017] Figure 2 It is a front view of the structural schematic diagram of the present invention;

[0018] Figure 3 A three-dimensional diagram of the structural schematic diagram of the pneumatic cutting group;

[0019] Figure 4 for Figure 3 A magnified image of point A;

[0020] Figure 5 It is a front perspective view of the structural schematic diagram of the movable positioning wheel set;

[0021] Figure 6 It is a rear perspective view of the structural schematic diagram of the movable positioning wheel set;

[0022] Figure 7 The left side stereogram is a schematic diagram of the structure of the pneumatic clamping mold and the traction wheel clamping and feeding mechanism;

[0023] Figure 8 The right side stereogram is a schematic diagram of the structure of the pneumatic clamping mold and the traction wheel clamping and feeding mechanism;

[0024] Figure 9 It is a rear stereoscopic view of the structural schematic diagram of the pneumatic clamping mold and traction wheel clamping and feeding mechanism.

[0025] Figure 10 It is a schematic diagram of the cross-sectional structure of two composite plastic strips in an embodiment of the invention. DETAILED DESCRIPTION

[0026] In order to make the objectives, technical solutions, and advantages of the present invention clearer, the present invention will be further described in detail below with reference to the accompanying drawings and embodiments.

[0027] Embodiment of the present invention: Refer to Figure 1 and Figure 2 , a precision fixed-length multi-segment cutting device for two composite plastic strips, comprising a frame 1, on the top of the frame 1 is fixedly connected with a ramp plate 2, on the ramp plate 2 are sequentially installed a pneumatic cutting group 3, a pneumatic clamping die 6, and a traction wheel clamping and feeding mechanism 8 from left to right, on one side of the pneumatic cutting group 3 is installed a movable positioning wheel group 4, inside the frame 1 is fixedly installed a PLC control cabinet 12 and an air bag 11, at the end of the frame 1 is fixedly installed a controller 7, the controller 7 is electrically connected to the PLC control cabinet 12, the air inlet end of the PLC control cabinet 12 is connected to the air bag 11 through a trachea, and its air outlet end is connected to the cylinders on the pneumatic cutting group 3, the movable positioning wheel group 4, the pneumatic clamping die 6, and the traction wheel clamping and feeding mechanism 8 through tracheas. On one side of the frame 1 close to the traction wheel clamping and feeding mechanism 8 is provided a material placement rack 9 for facilitating the placement of materials. On the frame 1 and above the ramp plate 2 is fixedly installed a lighting lamp 5 for providing illumination to facilitate operation and maintenance.

[0028] Refer to Figure 3 and Figure 4 , the pneumatic cutting group 3 includes a group of L-shaped support plates 301 arranged on the ramp plate 2, on the ramp plate 2 is provided with a chute 307, at the bottom of the L-shaped support plate 301 is provided with a boss 310 slidably engaged with the chute 307, on the ramp plate 2 and on one side of the L-shaped support plate 301 is fixedly connected with an adjusting seat 305 through bolts, the adjusting seat 305 is threadedly connected to the L-shaped support plate 301 through an adjusting screw 309, on each L-shaped support plate 301 is fixedly installed a cutting cylinder 302, on the telescopic rod of the cutting cylinder 302 is fixedly connected with a tool holder 303, and on the tool holder 303 is fixedly installed an art knife blade 304 perpendicular to the surface of the ramp plate 2. A limit stop 306 is fixedly installed at the end of the chute 307 to prevent the L-shaped support plate 301 from slipping out of the chute 307 during adjustment; a protective cover 308 is fixedly installed outside the art knife blade 304 to prevent the art knife blade 304 from being exposed and causing injury.

[0029] Refer to Figure 5 and Figure 6, the movable positioning wheel set 4 includes two columns 401 fixedly installed on the slope plate 2. Sliders 402 are slidably connected to both columns 401. A cross beam 403 is fixedly connected between the two sliders 402. A group of support rods 404 are fixedly connected to the cross beam 403. A positioning wheel 405 is rotatably connected to the end of each support rod 404. A connecting plate 407 is fixedly connected to the center of the cross beam 403. A positioning cylinder 406 is fixedly connected to the bottom of the slope plate 2 at a position corresponding to the connecting plate 407. The telescopic rod of the positioning cylinder 406 is fixedly connected to the connecting plate 407.

[0030] See Figures 7 to 9 , the pneumatic clamping die blank 6 includes a die blank seat 601 and a clamping cylinder 602 fixed on the top of the die blank seat 601. A lower die blank 604 is fixedly installed at the bottom of the die blank seat 601. An upper die blank 603 that cooperates with the lower die blank 604 is fixedly connected to the telescopic rod of the clamping cylinder 602. The traction wheel feeding mechanism 8 includes paired guiding wheels 807, limiting wheels 811, guiding wheels 806, feeding wheels 809 and straightening wheels 812. An L-shaped support rod 808 is fixedly connected to the right end of the slope plate 2. A support plate 810 parallel to the slope plate 2 is fixedly connected to the top of the L-shaped support rod 808. A pair of guiding wheels 807 and a pair of limiting wheels 811 are rotatably connected to the support plate 810 respectively. A guiding wheel mounting seat 805 and a feeding wheel mounting seat 801 are fixedly installed on the slope plate 2 respectively. A pair of guiding wheels 806 are rotatably connected to the guiding wheel mounting seat 805. A pair of straightening wheels 812 are rotatably connected to one end of the feeding wheel mounting seat 801. A feeding cylinder 802 is fixedly installed at the top of the other end of the feeding wheel mounting seat 801. A movable synchronous wheel 803 is fixedly connected to the telescopic rod of the feeding cylinder 802. A fixed synchronous wheel 804 is fixedly installed at the bottom of the slope plate 2 and below the movable synchronous wheel 803. The movable synchronous wheel 803 and the fixed synchronous wheel 804 are connected by a synchronous belt. A pair of feeding wheels 809 are fixedly connected to the rotating shafts of the movable synchronous wheel 803 and the fixed synchronous wheel 804 respectively. A feeding motor 814 is fixedly installed at the bottom of the slope plate 2 and below the fixed synchronous wheel 804. The feeding motor 814 is electrically connected to the controller 7. A driving wheel 813 is fixedly connected to the output shaft of the feeding motor 814. The driving wheel 813 and the fixed synchronous wheel 804 are connected by a synchronous belt.

[0031] The working principle of the present invention:

[0032] First, place the two composite plastic strips on the material placement rack 9, and then insert the ends of the two composite plastic strips into the guide wheel 807, the limiting wheel 811, the guiding wheel 806, the pinching wheel 809 and the straightening wheel 812 in turn, guide and limit the two composite plastic strips by the guide wheel 807 and the limiting wheel 811, and straighten and straighten the two composite plastic strips by the guiding wheel 806 and the straightening wheel 812; at this time, start the pinching cylinder 802 and the positioning cylinder 406 through the controller 7, so that the two pinching wheels 809 are brought together and clamp the two composite plastic strips at the same time, and then start the pinching motor 814 to drive the two pinching wheels 809 to rotate at the same time, so that the two composite plastic strips can be pinched and sent forward, and the two composite plastic strips are positioned by a group of positioning wheels 405 on the movable positioning wheel group 4 during the conveying process. position until the two composite plastic strips are conveyed to the bottom of the pneumatic cutting group 3; at this time, the clamping motor 814 stops working, the clamping cylinder 602 is activated, so that the lower mold tire 604 and the upper mold tire 603 clamp the two composite plastic strips, and then the clamping cylinder 802 is activated again, so that the two clamping wheels 809 loosen the two composite plastic strips, and all the cutting cylinders 302 are activated at the same time, driving the art blade 304 to cut the two composite plastic strips into multiple sections. After cutting, the art blade 304 returns to its original position, the positioning wheel 405 rises, and the two cut composite plastic strips slide along the ramp plate 2 into the display table for easy collection; the clamping cylinder 602 is activated again, the lower mold tire 604 and the upper mold tire 603 loosen the two composite plastic strips, and the two clamping wheels 809 clamp the two composite plastic strips forward again for the next cutting work.

[0033] Increase efficiency and reduce costs: Before using online cutting, in order to meet production needs, the workshop had 6 people (including 3 people to check the size) for product precision cutting. This took 42 hours a day (7 hours per person on average), and the product took 20 days to process. The monthly time saved was 840 hours, and the monthly cost saved was 840*70=58,800 yuan, and the annual cost saved was 705,600 yuan.

[0034] Efficiency and cost reduction: After using the cutting machine, Wanjiang spoiler wing products (such as models: 13E6345004-271.5, 13E6345004-258, 13E6345004-17) do not need fine cutting process after using the equipment, saving 5s per piece. The production number of our company in July 2019 was: 226,991 pieces, and the production number in August 2019 was: 369,213 pieces. The average monthly production quantity is expected to be 300,000 pieces. The monthly cost saving is 300,000*5 / 3600*70=29,000 yuan, and the annual cost saving is 2.9*12=350,000 yuan.

Claims

1. A precision fixed-length multi-segment cutting device for two composite plastic strips, comprising a frame (1), characterized in that: A ramp plate (2) is fixedly connected to the top of the frame (1). An air-operated cutting group (3), an air-operated clamping die blank (6), and a traction wheel pinch mechanism (8) are successively installed on the ramp plate (2) from left to right. A movable positioning wheel group (4) is installed on one side of the air-operated cutting group (3). A PLC control cabinet (12) and an air bag (11) are fixedly installed inside the frame (1). A controller (7) is fixedly installed at the end of the frame (1). The controller (7) is electrically connected to the PLC control cabinet (12). The air inlet end of the PLC control cabinet (12) is connected to the air bag (11) through an air pipe, and its air outlet end is respectively connected to the cylinders on the air-operated cutting group (3), the movable positioning wheel group (4), the air-operated clamping die blank (6), and the traction wheel pinch mechanism (8) through air pipes; The air-operated cutting group (3) includes a group of L-shaped support plates (301) arranged on the ramp plate (2). A chute (307) is provided on the ramp plate (2). A convex platform (310) that is slidably matched with the chute (307) is arranged at the bottom of the L-shaped support plate (301). An adjusting seat (305) is fixedly connected to the ramp plate (2) and on one side of the L-shaped support plate (301) through bolts. The adjusting seat (305) is threadedly connected to the L-shaped support plate (301) through an adjusting screw (309). A cutting cylinder (302) is fixedly installed on each L-shaped support plate (301). A tool holder (303) is fixedly connected to the telescopic rod of the cutting cylinder (302). An art knife blade (304) perpendicular to the surface of the ramp plate (2) is fixedly installed on the tool holder (303); A limit stop block (306) is fixedly installed at the end of the chute (307). A protective cover (308) is fixedly installed outside the art knife blade (304); The movable positioning wheel group (4) includes two columns (401) fixedly installed on the ramp plate (2). Sliders (402) are slidably connected to both columns (401). A cross beam (403) is fixedly connected between the two sliders (402). A group of support rods (404) are fixedly connected to the cross beam (403). A positioning wheel (405) is rotatably connected to the end of each support rod (404). A connecting plate (407) is fixedly connected to the center of the cross beam (403). A positioning cylinder (406) is fixedly connected to the bottom of the ramp plate (2) and at a position corresponding to the connecting plate (407). The telescopic rod of the positioning cylinder (406) is fixedly connected to the connecting plate (407); The air-operated clamping die blank (6) includes a die blank seat (601) and a clamping cylinder (602) fixed to the top of the die blank seat (601). A lower die blank (604) is fixedly installed at the bottom of the die blank seat (601). An upper die blank (603) that cooperates with the lower die blank (604) is fixedly connected to the telescopic rod of the clamping cylinder (602).

2. The precision fixed-length multi-segment cutting device for two composite plastic strips according to claim 1, wherein: The traction wheel clamping and feeding mechanism (8) includes a pair of arranged guide wheels (807), limit wheels (811), alignment wheels (806), clamping and feeding wheels (809) and straightening wheels (812). An L-shaped support rod (808) is fixedly connected to the right end of the slope plate (2). A support plate (810) parallel to the slope plate (2) is fixedly connected to the top of the L-shaped support rod (808). A pair of guide wheels (807) and a pair of limit wheels (811) are respectively rotatably connected to the support plate (810). An alignment wheel mounting seat (805) and a clamping and feeding wheel mounting seat (801) are respectively fixedly installed on the slope plate (2). A pair of alignment wheels (806) are rotatably connected to the alignment wheel mounting seat (805). A pair of straightening wheels (812) are rotatably connected to one end of the clamping and feeding wheel mounting seat (801). A clamping and feeding cylinder (802) is fixedly installed on the top of the other end of the clamping and feeding wheel mounting seat (801). A movable synchronous wheel (803) is fixedly connected to the telescopic rod of the clamping and feeding cylinder (802). A fixed synchronous wheel (804) is fixedly installed at the bottom of the slope plate (2) and below the movable synchronous wheel (803). The movable synchronous wheel (803) and the fixed synchronous wheel (804) are connected by a synchronous belt. A pair of clamping and feeding wheels (809) are respectively fixedly connected to the rotating shafts of the movable synchronous wheel (803) and the fixed synchronous wheel (804). A clamping and feeding motor (814) is fixedly installed at the bottom of the slope plate (2) and below the fixed synchronous wheel (804). The clamping and feeding motor (814) is electrically connected to the controller (7). A driving wheel (813) is fixedly connected to the output shaft of the clamping and feeding motor (814). The driving wheel (813) and the fixed synchronous wheel (804) are connected by a synchronous belt.

3. The precision fixed-length multi-segment cutting equipment for two composite plastic strips according to claim 1, characterized in that: A material placing rack (9) is arranged on one side of the frame (1) close to the traction wheel clamping and feeding mechanism (8).

4. The precision fixed-length multi-segment cutting equipment for two composite plastic strips according to claim 1, characterized in that: A lighting lamp (5) is fixedly installed on the frame (1) and above the slope plate (2).

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