A production line for laser cutting of plastic parts and automatic film lamination

Abstract

The present invention relates to an assembly line for laser water inlet cutting and automatic film pasting of plastic parts, comprising a two-color injection molding machine, a laser cutting machine, an assembly line and a three-station disc changer, wherein the three-station disc changer comprises a feeding mechanism, a blow molding disc clamping and transporting mechanism, a protective film stripping mechanism, a film pasting grabbing mechanism, a film cutting mechanism and a bracket, wherein the top of the bracket in the length direction is provided with a feeding mechanism, a film pasting grabbing mechanism and a protective film stripping mechanism in sequence, and film cutting mechanisms are provided at the top ends of the bracket in the length direction, respectively, and a blow molding disc clamping and transporting mechanism is provided at the middle position of the two film cutting mechanisms, and the blow molding disc clamping and transporting mechanism is movably connected to the bracket. The assembly line for laser water inlet cutting and automatic film pasting of plastic parts has the advantages of improving cutting accuracy and cutting speed, improving the accuracy and stability of pasting protective films, facilitating point placement, and improving efficiency.

Description

Technical Field

[0001] The invention relates to the technical field of automatic assembly lines, in particular to an assembly line for laser water incision and automatic film lamination of plastic parts. Background Art

[0002] At present, the injection molding mouth is first cut off by employees with pliers and 0.5mm is reserved, and then taken to the CNC workshop for CNC finishing. The surface of the product needs to be manually filmed separately, and then the blow-molded trays are manually placed separately and manually coated.

[0003] This production process is backward, the water cutting efficiency is low, it takes up a lot of manpower and production space, the manual film pasting has large deviations, and the manual placement of multi-hole products is easy to confuse.

[0004] To this end, we have developed a production line for laser cutting of plastic parts and automatic film lamination to solve the above shortcomings. Summary of the invention

[0005] The purpose of the present invention is to overcome the shortcomings of the prior art and provide a production line for laser cutting of plastic parts and automatic film pasting, which has the advantages of improving cutting accuracy and cutting speed, improving the accuracy and stability of protective film pasting, facilitating hole placement, and improving efficiency.

[0006] In order to achieve the above-mentioned purpose, the technical solution adopted by the present invention is: a production line for laser water inlet cutting and automatic film pasting of plastic parts, comprising a two-color injection molding machine, a laser cutting machine, an production line and a three-station tray changer arranged in sequence, the three-station tray changer comprises a feeding mechanism, a frame-shaped blow molding tray clamping and transporting mechanism, a protective film stripping mechanism, a film pasting grabbing mechanism, a film cutting mechanism and a bracket, the feeding mechanism, the film pasting grabbing mechanism and the protective film stripping mechanism are arranged in sequence at the top end of the length direction of the bracket, and the length direction of the bracket is A film cutting mechanism is respectively provided at the two ends of the top, and the blow molding disc clamping and conveying mechanism is provided at the middle position of the two film cutting mechanisms. The blow molding disc clamping and conveying mechanism is movably connected to the bracket. The product molded by the two-color injection molding machine is clamped to the laser cutting machine by the injection molding robot. The laser cutting machine cuts off the water outlets of the two holes of the product, and then the assembly line sends the product to the inspector. The inspector places the product after the appearance inspection on the three-station disc changer, and the three-station disc changer sticks a protective film on the product and covers the loaded blow molding disc.

[0007] Preferably, in order to improve the accuracy and speed of water nozzle cutting, the laser cutting machine includes a computer monitor and a cutting lens, a cutting panel and a cutting support plate arranged from top to bottom, the cutting lens is electrically connected to the computer monitor, and the bottom end of the cutting panel is slidably connected to the top end of the cutting support plate through a cylinder.

[0008] Preferably, in order to rotate the product and facilitate the attachment of a protective film to the product, the feeding mechanism includes a slide base plate, a slide mounting plate and a hollow jig base plate arranged in parallel from bottom to top, one end of the jig base plate is connected to a rotating flange, and the other end is connected to a rotating cylinder, the rotating flange is connected to the slide mounting plate through a bearing seat, a slide is connected at the top end of the slide base plate and the bottom end of the slide mounting plate, the slide is arranged along the length direction of the slide base plate, and the slide base plate is fixedly connected to the bracket.

[0009] Preferably, in order to position the one-mold-two-hole product, a I-shaped positioning jig is provided at the center of the jig bottom plate, a first rectangular hole of a step structure and a second rectangular hole of a step structure are provided at both ends of the positioning jig, and the two ends of the positioning jig in the length direction are respectively connected to a double-rod cylinder through a cylinder clamp.

[0010] Preferably, in order to make the periphery of the product engage with the periphery of the positioning fixture, two first notches are respectively provided at the two ends of the length direction of the first rectangular hole, a second notch and a third notch are respectively provided at the two sides of the length direction of the first rectangular hole, two bayonet holes are provided on the inner side wall of the third notch, two first notches are respectively provided at the two ends of the length direction of the second rectangular hole, a third notch and a fourth notch are respectively provided at the two sides of the length direction of the second rectangular hole, two bayonet holes are provided on the inner side wall of the fourth notch, and the second notch, the third notch and the fourth notch are arranged alternately. It is convenient to prevent mistakes and distinguish two-hole products.

[0011] Preferably, in order to peel off and position the protective film, the protective film peeling mechanism includes a film mounting main board and a film base plate vertically arranged at the bottom end of the film mounting main board, a film roll mounting disk, a film collection disk and a plurality of guide rollers are provided on the same side of the film mounting main board, a trapezoidal protective film peeling plate is provided on the lower side of the film roll mounting disk, a protective film positioning plate is abutted at one end of the protective film peeling plate, and the protective film positioning plate is connected to the bottom end of the protective film peeling plate and the film base plate.

[0012] Preferably, in order to facilitate the attachment of protective film to the product, the film grabbing mechanism includes a four-axis manipulator, which is mounted at the top of the bracket. The four-axis manipulator is provided with two adsorption plates, and two threaded suction nozzles are provided at the bottom end of each adsorption plate. The suction nozzles attach the protective film to the product and transport the product to the blow molding plate.

[0013] Preferably, in order to transport the empty blow molding tray to the coating area at both ends of the bracket, the blow molding tray clamping and transporting mechanism includes a first transport plate, a second transport plate, a first transport plate and a second transport plate connected in sequence, a tray dividing plate is respectively provided at both ends of the length direction of the blow molding tray clamping and transporting mechanism, and a blow molding tray clamping plate is respectively provided on both sides of the length direction, the tray dividing plate is connected to the first transport plate through a cylinder, the blow molding tray clamping plate is connected to the second transport plate through a cylinder, two pneumatic fingers are provided at the bottom end of the first transport plate, the pneumatic fingers are arranged at both ends of the first transport plate, and the second transport plate is slidably connected to the top of the bracket through a synchronous belt.

[0014] Preferably, in order to facilitate the cutting of the coated film of the blow molded disc after coating, the film cutting mechanism includes a second roller, a first roller and a rodless cylinder arranged in parallel from top to bottom, and a protective film mounting plate arranged at one end of the length direction of the bracket, the second roller, the first roller and the rodless cylinder are mounted in the width direction of the bracket, and the top of the protective film mounting plate is sequentially and parallelly provided with a second roller, a protective film reel and a second roller, the protective film reel is arranged parallel to the first roller, and a blade is vertically provided at the top of the rodless cylinder.

[0015] Preferably, in order to facilitate the feeding of the blow molding disk, a lifting and conveying mechanism is provided on the lower side of the film cutting mechanism, and the lifting and conveying mechanism includes a vertical conveying slide and a vertical guide rail support plate, the guide rail support plate is fixedly connected to the bracket, the conveying slide and the guide rail support plate are slidably connected by two guide rails, and a sensor sheet is provided at the top position of the conveying slide, and two U-groove-shaped photoelectric sensors are sequentially provided at the top position of the guide rail support plate, and the sensor sheet is inserted into the photoelectric sensor.

[0016] Due to the application of the above technical solution, the present invention has the following advantages compared with the prior art:

[0017] 1. The laser water inlet cutting and automatic film laminating production line for plastic parts of the present invention can laser cut the water inlet of a one-mold two-hole product, thereby improving the cutting accuracy and the cutting speed;

[0018] 2. The four-axis robot is attached with protective film to improve accuracy and stability;

[0019] 3. The four-axis manipulator arranges the products according to the hole numbers, so there will be no confusion in the product hole numbers;

[0020] 4. Except for one appearance inspector, the rest of the production is fully automatic and unmanned, which improves the level of automation and reduces production costs. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Attached Figure 1It is a structural schematic diagram of the production line for laser cutting of plastic parts and automatic film lamination according to the present invention.

[0022] Attached Figure 2 The present invention is attached Figure 1 Enlarged view of point A in the middle.

[0023] Attached Figure 3 It is a schematic structural diagram of the three-station disc changer of the present invention.

[0024] Attached Figure 4 The present invention is attached Figure 3 Enlarged view of point B in the middle.

[0025] Attached Figure 5 The present invention is attached Figure 3 Enlarged view of point C in the middle.

[0026] Attached Figure 6 It is a structural schematic diagram of the feeding mechanism of the present invention.

[0027] Attached Figure 7 It is a schematic diagram of the structure of the positioning fixture of the present invention.

[0028] Attached Figure 8 It is a structural schematic diagram of the film grabbing mechanism of the present invention.

[0029] Attached Fig. 9 It is a structural schematic diagram of the blow molding tray clamping and transporting mechanism of the present invention.

[0030] Attached Fig.10 The present invention is attached Fig. 9 Enlarged view of point D in the middle. DETAILED DESCRIPTION

[0031] The present invention will be further described in detail below in conjunction with the accompanying drawings and specific embodiments.

[0032] Attached Figure 1 and attached Figure 3In the invention, a production line for laser water inlet cutting and automatic film pasting of plastic parts comprises a two-color injection molding machine 25, a laser cutting machine 2, a production line 4 and a three-station tray changer 3 arranged in sequence, the three-station tray changer 3 comprises a feeding mechanism 5, a frame-shaped blow molding tray clamping and transporting mechanism 6, a protective film peeling mechanism 7, a film pasting grabbing mechanism 8, a film cutting mechanism 9 and a bracket 10, the top of the bracket 10 in the length direction is provided with a feeding mechanism 5, a film pasting grabbing mechanism 8 and a protective film peeling mechanism 7 in sequence, a film cutting mechanism 9 is provided at each of the two ends of the top of the bracket 10 in the length direction, a blow molding tray clamping and transporting mechanism 6 is provided in the middle position of the two film cutting mechanisms 9, and the blow molding tray clamping and transporting mechanism 6 is movably connected to the bracket 10. An L-shaped partition wall 105 is provided between the two-color injection molding machine 25, the laser cutting machine 2, the production line 4 and the three-station tray changer 3. The product molded by the two-color injection molding machine 25 is clamped by the injection molding robot to the laser cutting machine 2. The laser cutting machine 2 cuts off the sprues of the two holes of the product. Then the assembly line 4 delivers the product 100 to the inspector. The inspector places the product 100 after the appearance inspection on the three-station tray changer 3. The three-station tray changer 3 sticks a protective film 101 on the product 100 and covers the loaded blow-molded tray 102.

[0033] In order to improve cutting accuracy and speed, Figure 2 In the figure, the laser cutting machine 2 includes a computer display 21 and a cutting lens 22, a cutting panel 23 and a cutting support plate 24 arranged from top to bottom. The cutting lens 22 is electrically connected to the computer display 21, and the bottom end of the cutting panel 23 is slidably connected to the top end of the cutting support plate 24 by a cylinder. The product 100 is made of a mixture of PC and ABS, with a nozzle thickness of 0.5mm and a length of 12mm, so a 150W carbon dioxide laser cutting machine is selected, which is air-cooled. The injection molding robot takes out the product 100 and puts it into the slide positioning fixture. The slide positioning fixture transports the product to the laser cutting machine 2 for cutting. After the cutting is completed, the injection molding robot takes out the product 100 and the nozzle waste, puts the nozzle into the waste collection box, and puts the product into the assembly line 4 to flow to the next station.

[0034] Attached Figure 6 and attached Figure 7 In the figure, the feeding mechanism 5 includes a slide base plate 51, a slide mounting plate 52 and a hollow fixture base plate 53 arranged in parallel from bottom to top. One end of the fixture base plate 53 is connected to a rotating flange 54, and the other end is connected to a rotating cylinder 55. The rotating flange 54 is connected to the slide mounting plate 52 through a bearing seat. The top of the slide base plate 51 and the bottom of the slide mounting plate 52 are connected to a slide 56. The slide 56 is arranged along the length direction of the slide base plate 51, and the slide base plate 51 is fixedly connected to the bracket 10. The rotating cylinder 55 drives the product 100 to flip 180°, so that the film-applying surface faces upward, and is transported to the film-applying gripping mechanism 8 for film-applying.

[0035] A U-shaped positioning fixture 1 is provided at the center of the fixture base plate 53, and a first rectangular hole 11 with a stepped structure and a second rectangular hole 12 with a stepped structure are provided at both ends of the positioning fixture 1. The two ends of the positioning fixture 1 in the length direction are respectively connected to a double-rod cylinder 58 through a cylinder clamp 57.

[0036] Two first slots 111 are respectively provided at both ends of the first rectangular hole 11 in the length direction, a second slot 112 and a third slot 113 are respectively provided on both sides of the first rectangular hole 11 in the length direction, and two snap-fits 115 are provided on the inner side wall of the third slot; two first slots 111 are respectively provided at both ends of the second rectangular hole 12 in the length direction, a third slot 113 and a fourth slot 114 are respectively provided on both sides of the second rectangular hole in the length direction, and two snap-fits 115 are provided on the inner side wall of the fourth slot 114; the second slot 112, the third slot 113 and the fourth slot 114 are alternately arranged.

[0037] Attached Figure 8 In the figure, the protective film stripping mechanism 7 includes a film mounting main board 71 and a film mounting bottom board 72 vertically arranged at the bottom end of the film mounting main board 71. A film roll mounting plate 73, a film receiving plate 74 and a plurality of guide rollers 75 are arranged on the same side of the film mounting main board 71. A protective film stripping plate 76 with a trapezoidal structure is arranged on the lower side of the film roll mounting plate 73. A protective film positioning plate 77 is abutted at one end of the protective film stripping plate 76. The protective film positioning plate 77 is connected to the bottom end of the protective film stripping plate 76 and the film mounting bottom board 72. The rolled protective film 101 is stripped from the centrifugal paper, and two pieces are stripped each time to the protective film positioning plate 77. The four-axis manipulator 81 takes the protective film 101 from the protective film positioning plate 77 to the manipulator fixture, and then goes to the top of the product 100 to apply the film to the product surface.

[0038] In order to prevent confusion between the two products during placement, Figure 3 and attached Figure 5 In the figure, the film grabbing mechanism 8 includes a four-axis manipulator 81, which is mounted at the top of the bracket 10. The four-axis manipulator 81 is provided with two adsorption plates 82. The bottom ends of the adsorption plates 82 are each provided with two threaded suction nozzles 83. The suction nozzles 83 attach the protective film 101 to the product 100 and transport the product 100 to the blow molding plate 102.

[0039] Attached Fig. 9 and attached Fig.10In order to facilitate the feeding and clamping of the blow molding tray, the blow molding tray clamping and transporting mechanism 6 includes a first transport plate 61, a second transport plate 62, a first transport plate 61 and a second transport plate 62 connected in sequence, a plate dividing plate 63 is respectively provided at both ends of the length direction of the blow molding tray clamping and transporting mechanism 6, and a blow molding tray clamping plate 64 is respectively provided at both sides of the length direction, the plate dividing plate 63 is connected to the first transport plate 61 through a cylinder, and the blow molding tray clamping plate 64 is connected to the second transport plate 62 through a cylinder, and two pneumatic fingers 65 are provided at the bottom end of the first transport plate 61, and the pneumatic fingers 65 are arranged at both ends of the first transport plate 61, and the second transport plate 62 is slidably connected to the top of the bracket 10 through a synchronous belt. The pneumatic fingers 65 clamp the film to coat the blow molding tray filled with products. The collection and stacking of finished products, the middle is the empty blow molding tray loading area, the right is the No. 1 hole product stacking area, the left is the No. 2 hole product stacking area, and both ends are equipped with film laminating mechanisms to achieve the film lamination of the entire tray product to prevent the external environment from polluting the product appearance. The upper and lower blow molding trays 102 are separated by the cylinder pushing the fork to separate the blow molding trays 102 and clamp the blow molding trays 102 at the same time. The transportation is driven by a stepper motor to transport the empty blow molding trays 102 to the No. 1 hole product stacking area and the No. 2 hole product stacking area respectively.

[0040] Attached Figure 3 and attached Figure 4 In the figure, the film cutting mechanism 9 includes a second roller 92, a first roller 91 and a rodless cylinder 93 arranged in parallel from top to bottom, and a protective film mounting plate 94 arranged at one end of the length direction of the bracket 10. The second roller 92, the first roller 91 and the rodless cylinder 93 are mounted in the width direction of the bracket 10. The top of the protective film mounting plate 94 is sequentially parallel to a second roller 92, a protective film reel 95 and a second roller 92. The protective film reel 95 is arranged parallel to the first roller 91. A blade 96 is vertically arranged at the top of the rodless cylinder 93. The rollers and the blow molding disc tighten the film, and the rodless cylinder 93 drags the blade 96 to cut the film, preparing for the next film application.

[0041] A lifting and transporting mechanism is provided at the lower side of the film cutting mechanism 9, and the lifting and transporting mechanism includes a vertical transport slide 97 and a vertical guide rail support plate 98, the guide rail support plate 98 is fixedly connected to the bracket 10, the transport slide 97 and the guide rail support plate 98 are slidably connected through two guide rails, a sensing sheet 971 is provided at the top position of the transport slide 97, and two U-groove-shaped photoelectric sensors 981 are sequentially provided at the top position of the guide rail support plate 98, and the sensing sheet 971 is penetrated in the photoelectric sensor 981. The lifting and lowering of the blow molding disc 102 is realized by a servo system, and the positioning accuracy of the rise and fall is relatively high. In normal use, the program sets the height of each lifting or lowering to be the thickness distance of a blow molding disc 102.

[0042] The working principle of this pipeline is as follows:

[0043] 1. The injection molding robot takes out the product with 1 mold and 2 cavities and puts it into the fixture on the cutting panel of the laser cutting machine 2.

[0044] 2. The laser cutting machine 2 cuts off the water outlet and resets to the initial state.

[0045] 3. The injection molding robot takes out the cut product and the nozzle and places them on the assembly line 4.

[0046] 4. The inspector removes the product from production line 4 to check its appearance and drops the nozzle into the collection box.

[0047] 5. After the appearance inspection is completed, the inspector places the product into the positioning fixture 1 according to the hole number and presses the start button.

[0048] 6. The double-rod cylinders 58 at both ends of the product positioning fixture 1 are pressed, and the rotating cylinder 55 is opened and turned 180 degrees at the same time to rotate the film-attaching surface of the product upward.

[0049] 7. The four-axis robot 81 takes a piece of peeled protective film 101 and sticks it on the product 100, and sticks two products in sequence.

[0050] 8. The four-axis robot 81 places the finished film-applied products into the blow molding tray 102 by dividing the cavities.

[0051] 9. After the tray is full, the film cutting mechanism will cover the entire tray with a layer of film, and then cut the film after the peritoneum is completed.

[0052] 10. A blow molding plate is lowered from each of the film coating areas at both ends of the bracket 10, and the empty plate area on the conveying slide 97 is loaded with material, and an empty blow molding plate is provided to each of the film coating areas.

[0053] 11. Work in a cycle.

[0054] The present invention has the following advantages:

[0055] 1. The laser water inlet cutting and automatic film laminating production line for plastic parts of the present invention can laser cut the water inlet of a one-mold two-hole product, thereby improving cutting accuracy and cutting speed.

[0056] 2. The four-axis robot is affixed with protective film to improve accuracy and stability.

[0057] 3. The four-axis robot arranges the products according to the hole numbers, so there will be no confusion in the product hole numbers.

[0058] 4. Except for one appearance inspector, the rest of the production is fully automatic and unmanned, which improves the level of automation and reduces production costs.

[0059] The above are only specific application examples of the present invention and do not constitute any limitation on the protection scope of the present invention. Any technical solution formed by equivalent transformation or equivalent replacement shall fall within the protection scope of the present invention.

Claims

1. A production line for laser cutting of plastic parts and automatic film lamination, characterized by: It comprises a two-color injection molding machine, a laser cutting machine, an assembly line and a three-station tray changing machine which are arranged in sequence, the three-station tray changing machine comprises a feeding mechanism, a frame-shaped blow molding tray clamping and conveying mechanism, a protective film peeling mechanism, a film sticking grabbing mechanism, a film cutting mechanism and a bracket, the feeding mechanism, the film sticking grabbing mechanism and the protective film peeling mechanism are arranged in sequence at the top of the bracket in the length direction, one film cutting mechanism is arranged at each of the two ends of the top of the bracket in the length direction, the blow molding tray clamping and conveying mechanism is arranged at the middle position of the two film cutting mechanisms, the blow molding tray clamping and conveying mechanism is movably connected to the bracket, the product molded by the two-color injection molding machine is clamped to the laser cutting machine by the injection molding robot, the laser cutting machine cuts off the water outlets of the two holes of the product, and then the assembly line delivers the product to the inspector, the inspector places the product after the appearance inspection on the three-station tray changing machine, the three-station tray changing machine sticks the protective film on the product and covers the loaded blow molding tray; The feeding mechanism includes a slide base plate, a slide mounting plate and a hollow fixture base plate arranged in parallel from bottom to top, one end of the fixture base plate is connected to a rotating flange, and the other end is connected to a rotating cylinder, the rotating flange is connected to the slide mounting plate through a bearing seat, a slide is connected at the top end of the slide base plate and the bottom end of the slide mounting plate, the slide is arranged along the length direction of the slide base plate, and the slide base plate is fixedly connected to the bracket; A positioning fixture in the shape of a letter "Y" is provided at the center of the bottom plate of the fixture, a first rectangular hole of a stepped structure and a second rectangular hole of a stepped structure are provided at both ends of the positioning fixture, and both ends of the positioning fixture in the length direction are respectively connected to a double-rod cylinder through a cylinder clamp; Two first notches are respectively provided at both ends of the first rectangular hole in the length direction, a second notch and a third notch are respectively provided at both sides of the first rectangular hole in the length direction, two bayonet holes are provided on the inner side wall of the third notch, two first notches are respectively provided at both ends of the second rectangular hole in the length direction, a third notch and a fourth notch are respectively provided at both sides of the second rectangular hole in the length direction, two bayonet holes are provided on the inner side wall of the fourth notch, and the second notch, the third notch and the fourth notch are alternately arranged; The protective film stripping mechanism includes a film mounting main board and a film base plate vertically arranged at the bottom end of the film mounting main board, a film roll mounting disk, a film collection disk and a plurality of guide rollers are arranged on the same side of the film mounting main board, a trapezoidal protective film stripping plate is arranged on the lower side of the film roll mounting disk, a protective film positioning plate is abutted at one end of the protective film stripping plate, and the protective film positioning plate is connected to the bottom end of the protective film stripping plate and the film base plate.

2. The assembly line for laser cutting of plastic parts and automatic film lamination according to claim 1, characterized in that: The laser cutting machine includes a computer monitor and a cutting lens, a cutting panel and a cutting support plate arranged from top to bottom. The cutting lens is electrically connected to the computer monitor, and the bottom end of the cutting panel and the top end of the cutting support plate are slidably connected via a cylinder.

3. The production line for laser cutting of plastic parts and automatic film lamination according to claim 1, characterized in that: The film grabbing mechanism includes a four-axis manipulator, which is mounted at the top of the bracket. The four-axis manipulator is provided with two adsorption plates, and two threaded suction nozzles are respectively provided at the bottom end of the adsorption plates. The suction nozzles attach the protective film to the product and transport the product to the blow molding plate.

4. The production line for laser cutting of plastic parts and automatic film lamination according to claim 1, characterized in that: The blow molding disk clamping and conveying mechanism includes a first conveying plate, a second conveying plate, the first conveying plate and the second conveying plate which are connected in sequence, a dividing plate is respectively provided at both ends of the blow molding disk clamping and conveying mechanism in the length direction, and a blow molding disk clamping plate is respectively provided on both sides in the length direction, the dividing plate is connected to the first conveying plate through a cylinder, the blow molding disk clamping plate is connected to the second conveying plate through a cylinder, two pneumatic fingers are provided at the bottom end of the first conveying plate, the pneumatic fingers are arranged at the two ends of the first conveying plate, and the second conveying plate is slidably connected to the top of the bracket through a synchronous belt.

5. The production line for laser cutting of plastic parts and automatic film lamination according to claim 4, characterized in that: The film cutting mechanism includes a second roller, a first roller and a rodless cylinder arranged in parallel from top to bottom, and a protective film mounting plate arranged at one end of the bracket in the length direction. The second roller, the first roller and the rodless cylinder are mounted in the width direction of the bracket. At the top of the protective film mounting plate, a second roller, a protective film reel and a second roller are arranged in parallel in sequence. The protective film reel is arranged parallel to the first roller, and a blade is vertically arranged at the top of the rodless cylinder.

6. The production line for laser cutting of plastic parts and automatic film lamination according to claim 5, characterized in that: A lifting and transporting mechanism is provided on the lower side of the film cutting mechanism, and the lifting and transporting mechanism includes a vertical transport slide and a vertical guide rail support plate. The guide rail support plate is fixedly connected to the bracket, and the transport slide and the guide rail support plate are slidably connected through two guide rails. A sensing sheet is provided at the top position of the transport slide, and two U-groove-shaped photoelectric sensors are sequentially provided at the top position of the guide rail support plate, and the sensing sheet is inserted into the photoelectric sensor.

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