Trimming device for processing environment-friendly plastic product

Abstract

The invention relates to the field of plastic processing, in particular to an environment-friendly trimming device for plastic product processing. An environment-friendly trimming device for plastic product processing comprises a machine table, a hydraulic rod, a linkage frame and the like. Two hydraulic rods are arranged above the machine table; the telescopic parts of the two hydraulic rods are jointly and fixedly connected with a linkage frame. The flatness of the exposed outer surface of the plastic uptake box body is detected, the outer surface of the plastic uptake box body is heated and softened through the heater, then the plastic uptake box body is extruded and leveled through the shaping part and the annular air bag expanding outwards, air is sucked into the leveled part, and the leveled part is cooled and shaped, so that the flatness of the plastic uptake box body is improved. The situation that the annular trimming knife cannot effectively trim burrs and flashes due to tilting of the blister box body is avoided, the burrs and the flashes are exposed to the upper side of the second step part by lifting and lowering the blister box body upwards, the second step part serves as a cutting supporting face, and the burrs and the flashes of the blister box body are fully removed through the annular trimming knife.

Description

Technical Field

[0001] The present invention relates to the field of plastic processing, and particularly relates to a trimming device for processing environment-friendly plastic products. Background Art

[0002] Existing mobile phone accessory packaging boxes generally use blister products, which can not only fully protect mobile phone accessories, but also have a simple and efficient forming process, suitable for industrialized and large-scale production.

[0003] Existing blister products are generally formed by heating thin plastic sheets and then blister molding. For small blister products such as mobile phone accessory packaging boxes, they are generally produced in batches. Therefore, after batch production, it is necessary to punch them to separate each blister product. However, during the punching process, the punching tool heats up due to continuous work, and the mobile phone accessory packaging box is a thin-walled blister product, which will not only cause burrs and flash on the edge of the blister product, but also the punching tool will conduct heat to the blister product after heating up, resulting in the edge of the blister product being deformed by heat, and then warping occurs. This will cause the blister product not to match the subsequent outer packaging process, affecting the production efficiency of the enterprise. Summary of the Invention

[0004] In order to overcome the disadvantages that the punching process causes burrs and flash on the blister product, and the edge of the blister product is deformed, resulting in the blister product not being able to match the subsequent process, the present invention provides a trimming device for processing environment-friendly plastic products.

[0005] The technical solution of the present invention is: a trimming device for processing environment-friendly plastic products, including a machine table, a hydraulic rod and a linkage frame; two hydraulic rods are arranged above the machine table; the telescopic parts of the two hydraulic rods are jointly fixed with the linkage frame; it further includes an upper die, a lower die, a power unit, an annular trimming knife, a whole frame, a hollow column, a branch pipe and an annular airbag; several upper dies are fixed on the linkage frame; several lower dies are fixed on the machine table; each lower die corresponds to an upper die above it; each upper die is connected with a power unit; each power unit is connected with an annular trimming knife; the power unit is used to drive the annular trimming knife to move along the outer wall of the blister box body to trim the blister box body; each annular trimming knife is slidably connected with the corresponding upper die; each annular trimming knife is connected with a whole frame, and the whole frame is made of a high heat-conducting material; each whole frame is slidably connected with the corresponding upper die; the lower die is communicated with a hollow column; several branch pipes are communicated with the upper part of the hollow column; one side of all the branch pipes away from the hollow column is jointly communicated with an annular airbag; the annular airbag is fixed with the lower die.

[0006] Further, the power unit includes an electric actuator, a vertical rod, and a circular frame; two symmetrically arranged electric actuators are installed on each upper mold; two vertical rods are fixedly connected to the telescopic part of each electric actuator; all the vertical rods of the same upper mold are fixedly connected to form a circular frame; each circular frame is fixedly connected to a circular trimming knife.

[0007] Further, the side wall of the annular airbag is flush with the side wall of the lower mold.

[0008] Further, a number of elastic members are fixedly connected to the lower part of each circular frame; all the elastic members on each circular frame are fixedly connected to form a whole frame.

[0009] Further, the upper part of the lower mold is a support part, the lower part of the lower mold is provided with a first stepped part, the width of the upper side surface of the first stepped part is the same as the wall thickness of the blister box body, and the step of the first stepped part is flush with the lower part of the annular airbag.

[0010] Further, a number of laser displacement sensors for detecting the surface flatness are provided at the lower part of each whole frame.

[0011] Further, each whole frame is provided with a circular heater; each whole frame is provided with a shaping part; the shaping part is located above the heater and is used for leveling the edge of the blister box body softened by the heater.

[0012] Further, sleeves are fixedly connected to each upper mold; a first air pipe is fixedly connected to the middle of each sleeve; each first air pipe penetrates through the corresponding sleeve; a solenoid valve is provided in each sleeve; a number of air holes are opened on each first air pipe, and the air holes are all located above the corresponding solenoid valve; each solenoid valve is communicated with a number of second air pipes; all the second air pipes on each upper mold penetrate through the sleeves; a second stepped part is provided at the upper part of each whole frame; a circular air flow cavity is opened in each whole frame; a circular horizontal groove is opened on the inner side of each air flow cavity, and a filter screen is provided on the side far away from the air flow cavity of the horizontal groove; the lower edge of each horizontal groove is flush with the lower part of the corresponding second stepped part; all the lower parts of the second air pipes on each upper mold are communicated with the air flow cavity.

[0013] Further, a number of support feet are provided at the lower part of the machine table, and an anti-slip pad is provided on each support foot.

[0014] Further, two electric guide rails are installed on the upper part of the machine table; two electric sliders are slidably connected to each electric guide rail; all the electric sliders are fixedly connected to form a ceiling; the ceiling is fixedly connected to two hydraulic rods.

[0015] The beneficial effects are as follows: 1. By detecting the flatness of the exposed outer surface of the blister box body, heating and softening the outer surface of the blister box body through a heater, then using the shaping part and the outward-expanding annular airbag to extrude and flatten the blister box body, and then sucking air at the flattened part and cooling and shaping the flattened part, it is avoided that the blister box body warps, resulting in the annular trimming knife being unable to effectively trim burrs and flash.

[0016] 2. By lifting the blister box body upward, the burrs and flash are moved above the second stepped part, and then the blister box body is pressed down. Thus, the burrs and flash are scraped on the second stepped part, and at the same time, the second stepped part serves as a support platform for the annular trimming knife to cut the burrs and flash. At this time, the annular trimming knife is used to fully remove the burrs and flash of the blister box body. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a schematic three-dimensional structure diagram of the trimming device for environmentally friendly plastic products processing according to the present invention; Figure 2 It is a schematic diagram of the installation position of the blister box body according to the present invention; Figure 3 It is a partial exploded view of the present invention; Figure 4 It is a partial cross-sectional view of the blister box body according to the present invention; Figure 5 It is a schematic diagram of the installation position of the annular airbag according to the present invention; Figure 6 It is a partial cross-sectional view of the integral frame according to the present invention; Figure 7 It is a first perspective view of the upper die and the integral frame according to the present invention; Figure 8 It is a second perspective view of the upper die and the integral frame according to the present invention; Figure 9 It is a schematic diagram of the working state of the sleeve, the first air pipe, the solenoid valve and the second air pipe according to the present invention.

[0018] In the reference numerals: 001 - blister box body, 1 - machine table, 2 - hydraulic rod, 3 - linkage frame, 4 - upper die, 5 - lower die, 6 - electric actuator, 7 - vertical rod, 8 - annular frame, 9 - annular trimming knife, 10 - elastic member, 11 - integral frame, 12 - hollow column, 13 - branch pipe, 14 - annular airbag, 15 - electric guide rail, 16 - electric slider, 17 - ceiling, 5001 - support part, 5002 - first stepped part, 1101 - heater, 1102 - shaping part, 1103 - second stepped part, 1104 - air flow cavity, 1105 - horizontal groove, 101 - sleeve, 102 - first air pipe, 103 - solenoid valve, 104 - second air pipe. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0019] The embodiments of the present invention will be described in detail below with reference to the accompanying drawings.

[0020] The first embodiment An edge trimming device for processing environmentally friendly plastic products, according to Figures 1-9 As shown, it includes a machine table 1, a hydraulic rod 2 and a linkage frame 3; there are two hydraulic rods 2 arranged front and back above the machine table 1; the telescopic parts of the two hydraulic rods 2 are commonly fixed with a linkage frame 3; It further includes an upper die 4, a lower die 5, a power unit, an annular trimming knife 9, a whole frame 11, a hollow column 12, a branch pipe 13 and an annular airbag 14; several upper dies 4 are fixed to the lower part of the linkage frame 3; several lower dies 5 are fixed to the machine table 1; each lower die 5 corresponds to an upper die 4 above it; each upper die 4 is connected with a power unit; each power unit is connected with an annular trimming knife 9; the power unit is used to drive the annular trimming knife 9 to move along the outer wall of the plastic suction box body 001 to trim the plastic suction box body 001; each annular trimming knife 9 is slidably connected to the corresponding upper die 4; each annular trimming knife 9 is connected with a whole frame 11, and the whole frame 11 is made of a high thermal conductivity material; each whole frame 11 is slidably connected to the corresponding upper die 4; the middle part of the lower die 5 is communicated with a hollow column 12; the upper part of the hollow column 12 is communicated with four branch pipes 13 distributed in an annular array; the sides of all the branch pipes 13 away from the hollow column 12 are commonly communicated with an annular airbag 14; the annular airbag 14 is fixed to the lower die 5.

[0021] The power unit includes an electric actuator 6, a vertical rod 7 and an annular frame 8; two symmetrically arranged electric actuators 6 are installed on each upper die 4; the electric actuator 6 is an electric push rod; the telescopic parts of each electric actuator 6 are fixed with two vertical rods 7; all the vertical rods 7 of the same upper die 4 are commonly fixed with an annular frame 8; each annular frame 8 is fixed with an annular trimming knife 9.

[0022] The side wall of the annular airbag 14 is flush with the side wall of the lower die 5.

[0023] It further includes an elastic member 10; 12 elastic members 10 distributed in a rectangular shape are fixed to the lower part of each annular frame 8; the elastic member 10 is a spring rod; all the elastic members 10 on each annular frame 8 are commonly fixed with a whole frame 11.

[0024] The upper part of the lower die 5 is set as a support part 5001, and the lower part of the lower die 5 is provided with a first stepped part 5002. The width of the upper side surface of the first stepped part 5002 is the same as the wall thickness of the plastic suction box body 001, and the step of the first stepped part 5002 is flush with the lower part of the annular airbag 14.

[0025] Several laser displacement sensors are arranged in a rectangular shape at the lower part of each whole frame 11.

[0026] A circular heater 1101 is provided at the lower inner part of each integral frame 11; a shaping part 1102 is provided on the inner side of each integral frame 11; the shaping part 1102 is located above the heater 1101, and the shaping part 1102 is used to flatten the edge of the plastic suction box body 001 softened by the heater 1101.

[0027] It also includes a sleeve 101, a first air pipe 102, a solenoid valve 103 and a second air pipe 104; each upper die 4 is fixedly connected with a sleeve 101; a first air pipe 102 is fixedly connected to the middle of each sleeve 101; each first air pipe 102 penetrates through the corresponding sleeve 101; a solenoid valve 103 is provided in each sleeve 101; a number of air holes are opened on each first air pipe 102, and the air holes are all located above the corresponding solenoid valve 103; each solenoid valve 103 is connected to two second air pipes 104 distributed front and back; all the second air pipes 104 on each upper die 4 penetrate through the sleeve 101; a second stepped part 1103 is provided on the upper part of each integral frame 11; a circular air flow cavity 1104 is opened in each integral frame 11; a circular horizontal groove 1105 is opened on the inner side of each air flow cavity 1104, and a filter screen is provided on the side of the horizontal groove 1105 away from the air flow cavity 1104; the lower edge of each horizontal groove 1105 is flush with the lower part of the corresponding second stepped part 1103; the lower parts of all the second air pipes 104 on each upper die 4 are jointly communicated with the air flow cavity 1104.

[0028] The working steps of the above embodiment are as follows: First, control the two hydraulic rods 2 to contract, synchronously drive the linkage frame 3 and the corresponding components thereon to move upward, so that the upper die 4 is separated from the lower die 5. Then, control the external manipulator to place each plastic suction box body 001 on the lower die 5 in turn. After all the lower dies 5 are placed with the plastic suction box bodies 001, control the two hydraulic rods 2 to extend, synchronously drive the linkage frame 3 and the corresponding components thereon to move downward until each upper die 4 presses the corresponding plastic suction box body 001 tightly on the lower die 5, and the lower edge of the plastic suction box body 001 contacts the first stepped part 5002. Thus, the plastic suction box body 001 is fixed by the clamping of the upper die 4 and the lower die 5 as Figure 2 shown, and at the same time, the deformed parts generated during its transfer and transportation are extruded and reset.

[0029] Next, control the electric actuator 6 on each upper die 4 to contract, synchronously driving the vertical rod 7 and its corresponding components to move downward, so that the annular trimming knife 9 slides downward along the outer surface of the plastic suction box body 001. When the annular trimming knife 9 moves to the lower edge of the plastic suction box body 001, it cuts off the burrs and flash on the lower edge of the plastic suction box body 001. Considering that the plastic suction box body 001 used as a mobile phone accessory is generally in a thin-walled form and has a small volume, when it is subjected to plastic suction processing, multiple plastic suction box bodies 001 are processed at one time, and then blanking is performed to separate each plastic suction box body 001. Since the blanking direction adopts a top-down operation mode, the generated burrs and flash are all distributed downward and are located outside the edge of the plastic suction box body 001. During the blanking process, due to the continuous operation of the tool, the tool heats up. When the tool is heated up and then used to blank the plastic suction box body 001, the thin-walled plastic suction box body 001 is prone to warping deformation at the cut edge. The degree of warping deformation is different, resulting in the inability to use a unified tool for trimming, thereby increasing the difficulty of the trimming work. At this time, the laser displacement sensor set at the lower part of the integral frame 11 is used to detect the flatness of the exposed outer surface of the plastic suction box body 001. If it is detected that the outer surface of the plastic suction box body 001 is warped and deformed, when the integral frame 11 approaches the deformed position, the heater 1101 is controlled to start. The heater 1101 heats and softens the outer surface of the plastic suction box body 001. Then, as the integral frame 11 continues to descend, the shaping part 1102 slides downward along the plastic suction box body 001. The shaping part 1102 smooths down the softened plastic suction box body 001, so that the burrs and flash at the lower part of the plastic suction box body 001 contact the first stepped part 5002. Control to turn off the heater 1101 and start the external air pump. The external air pump pumps air into the corresponding annular airbag 14 through the hollow column 12 and the branch pipe 13 in sequence, so that the annular airbag 14 expands. At this time, the outwardly expanding annular airbag 14 and the shaping part 1102 squeeze and level the softened part of the plastic suction box body 001.

[0030] Among them, the integral frame 11 is made of a high thermal conductivity material. Therefore, most of the heat during the heating and softening of the plastic suction box body 001 is transferred to the integral frame 11 to achieve the cooling of the plastic suction box body 001. And when the plastic suction box body 001 is leveled by the clamping cooperation of the outwardly expanding annular airbag 14 and the shaping part 1102, control to turn off the heater 1101 and also control to start the external air pump. The external air pump is connected to the first air pipe 102. The external air pump extracts the air above the sleeve 101 through the air holes on the first air pipe 102. Control to start the solenoid valve 103. The solenoid valve 103 blocks the first air pipe 102 and connects the corresponding second air pipe 104, as Figure 9As shown in the left legend, air in the corresponding air flow chamber 1104 is pumped out through the second air pipe 104. Since there is negative pressure in the air flow chamber 1104, outside air enters the air flow chamber 1104 through the horizontal groove 1105, and the horizontal groove 1105 is located at the position of the second stepped portion 1103, as Figure 6 shown. When the second stepped portion 1103 reaches the position flush with the first stepped portion 5002, outside air enters the air flow chamber 1104. The flowing air cools the entire frame 11 and cools and shapes the position where the plastic suction box body 001 resumes deformation, thereby preventing the edge of the plastic suction box body 001 from warping again after the lower part of the plastic suction box body 001 is smoothed out.

[0031] Then the entire frame 11 continues to descend. When the second stepped portion 1103 is flush with the first stepped portion 5002, at this time the annular trimming knife 9 also slides down to the upper part of the lower edge of the plastic suction box body 001. Since the inner side of the annular trimming knife 9 is closely attached to the surface of the plastic suction box body 001 at this time, after the plastic suction box body 001 is heated and softened and shaped in the front, the exposed outer surface of the plastic suction box body 001 is closely attached to the outer wall of the lower mold 5. At this time, the annular trimming knife 9 continues to move downward. After the entire frame 11 contacts the lower part of the lower mold 5, the elastic member 10 is deformed under pressure. Then, the two hydraulic rods 2 are controlled to contract, synchronously driving the linkage frame 3 and the corresponding components thereon to move upward, so that the plastic suction box body 001 moves upward, and the lower edge of the plastic suction box body 001 is separated from the first stepped portion 5002 again until the burrs and flash on the edge of the plastic suction box body 001 cross the second stepped portion 1103. Then, the two hydraulic rods 2 are controlled to extend, so that the plastic suction box body 001 moves downward along the second stepped portion 1103. The burrs and flash outside the lower edge of the plastic suction box body 001 are blocked by the second stepped portion 1103 until the lower edge of the plastic suction box body 001 contacts the first stepped portion 5002 again. At this time, the burrs and flash of the plastic suction box body 001 are exposed on the upper side of the second stepped portion 1103. Then, the annular trimming knife 9 is controlled to continue moving downward. At this time, the second stepped portion 1103 serves as a support platform for the annular trimming knife 9 to cut off the burrs and flash. The annular trimming knife 9 can cut off the turned-up burrs and flash. At the same time, the external air pump also sucks air through the first air pipe 102. Therefore, outside air enters the air flow chamber 1104 through the horizontal groove 1105. At this time, the cut-off burrs and flash remain on the second stepped portion 1103. The burrs and flash enter the horizontal groove 1105 with the air flow and are intercepted by the filter screen, preventing the cut-off burrs and flash from diffusing into the air and polluting the air environment. Thus, the trimming process of the plastic suction box body 001 is completed.

[0032] After the trimming operation is completed, the solenoid valve 103 is controlled to be activated. The solenoid valve 103 closes the second air pipe 104 and connects the first air pipe 102, as Figure 9As shown, the first air pipe 102 penetrates the upper mold 4, and the lower part of the upper mold 4 is in contact with the blister box body 001. As Figure 7 shown, when the external air pump sucks air through the first air pipe 102, the first air pipe 102 extracts the air between the upper mold 4 and the blister box body 001, causing the blister box body 001 to be tightly adsorbed on the upper mold 4. At this time, control the two hydraulic rods 2 to contract, synchronously drive the corresponding linkage frames 3 and the corresponding components thereon to move upward, so as to lift all the upper molds 4 upward, and synchronously lift the trimmed blister box body 001 upward. After the blister box body 001 is completely separated from the lower mold 5, at this time, just place a cross plate between the lower mold 5 and the blister box body 001 through an external manipulator. The cross plate supports the blister box body 001. At this time, control the external air pump to stop pumping air, so that the upper mold 4 no longer sucks the blister box body 001, and all the blister box bodies 001 are stably stopped on the cross plate. Control the upper mold 4 to continue to move upward until the upper mold 4 is completely separated from the blister box body 001, then the cross plate can be pulled out through an external manipulator, and the blister box bodies 001 on the cross plate can be sorted and collected, realizing the rapid discharging of the blister box bodies 001 and effectively improving the work efficiency.

[0033] The second embodiment On the basis of the first embodiment, according to Figure 1 shown, four rectangularly distributed feet are provided at the lower part of the machine table 1, and anti-slip pads are provided on each foot.

[0034] It also includes an electric guide rail 15, an electric slider 16 and a ceiling 17; two left-right distributed electric guide rails 15 are installed on the upper part of the machine table 1; two front-back distributed electric sliders 16 are slidably connected to each electric guide rail 15; all the electric sliders 16 are fixedly connected to the ceiling 17; the upper part of the ceiling 17 is fixedly connected to the two hydraulic rods 2.

[0035] The working steps of the above embodiment are as follows: During the above working process, the work of rapid material withdrawal is mentioned. Therefore, in order to further improve work efficiency, it is also necessary to consider the combination with industrialization and intelligentization. Thus, an electric guide rail 15 and an electric slider 16 are set. The electric guide rail 15 is used to connect processes such as blanking, trimming, and material withdrawal. Therefore, after the thermoforming and blanking processes are completed, all the electric sliders 16 are controlled to move forward to the discharge position of the blanking process. The hydraulic rod 2 is controlled to extend, so that the upper die 4 contacts the thermoformed box body 001. Then, the external air pump starts to pump air. The external air pump pumps air through the first air pipe 102, so that the upper die 4 adsorbs the thermoformed box body 001. Then, the hydraulic rod 2 contracts to drive the thermoformed box body 001 to move upward. Then, all the electric sliders 16 are controlled to move backward until they move above the machine table 1. At this time, only the hydraulic rod 2 needs to be controlled to extend, so that the upper die 4 and the thermoformed box body 001 thereon move downward until the upper die 4 and the lower die 5 cooperate to clamp the thermoformed box body 001, and then the trimming process in the first embodiment can be started for the thermoformed box body 001. After the trimming is completed, the thermoformed box body 001 is still sucked by the upper die 4. The hydraulic rod 2 is controlled to contract, driving the thermoformed box body 001 to move upward and separate from the lower die 5. All the electric sliders 16 are controlled to move backward until the thermoformed box body 001 is transferred to the material withdrawal and collection area. Only the external air pump needs to be controlled to stop sucking air, and the upper die 4 releases the fixation of the thermoformed box body 001. Then, the hydraulic rod 2 is controlled to contract, so that the upper die 4 is separated from the thermoformed box body 001, realizing the full-automatic batch material unloading of the thermoformed box body 001, significantly improving the processing efficiency. Then, a waste material collection box is set behind the material withdrawal and collection area. The electric slider 16 is controlled to continue moving backward, so that all the integral frames 11 are located above the waste material collection box. Then, the two hydraulic rods 2 are controlled to extend, so that the integral frames 11 enter the waste material collection box. At this time, the external air pump is controlled to blow air into the first air pipe 102, so that air blows out from the horizontal groove 1105 through the air flow cavity 1104. In the first embodiment, the filter screen at the position of the horizontal groove 1105 intercepts burrs and flash. Therefore, through the reverse blowing at this time, the automatic cleaning of the filter screen at the position of the horizontal groove 1105 is realized, effectively avoiding the blockage of the filter screen at the position of the horizontal groove 1105, which affects the heat dissipation and shaping of the thermoformed box body 001. Then, the two hydraulic rods 2 are controlled to contract and reset. Thus, by combining with the assembly line, the mistakes of manual operation are reduced, making the processing process intelligent and further improving the processing efficiency.

[0036] The above are only the preferred embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. An edge trimming device for processing environmentally friendly plastic products, comprising a machine table (1), a hydraulic rod (2) and a linkage frame (3); two hydraulic rods (2) are arranged above the machine table (1); the telescopic parts of the two hydraulic rods (2) are fixedly connected to the linkage frame (3); characterized in that: It also includes an upper mold (4), a lower mold (5), a power unit, an annular trimming knife (9), an integral frame (11), a hollow column (12), a branch pipe (13), and an annular airbag (14); several upper molds (4) are fixedly connected to the linkage frame (3); several lower molds (5) are fixedly connected to the machine table (1); each lower mold (5) corresponds to an upper mold (4) above it; each upper mold (4) is connected to a power unit; each power unit is connected to an annular trimming knife (9); the power unit is used to drive the annular trimming knife (9) to move along the outer wall of the plastic suction box body (001) to trim the plastic suction box body (001); each annular trimming knife (9) is slidably connected to the corresponding upper mold (4); each annular trimming knife (9) is connected to an integral frame (11), and the integral frame (11) is made of a high thermal conductivity material; each integral frame (11) is slidably connected to the corresponding upper mold (4); the lower mold (5) is communicated with a hollow column (12); several branch pipes (13) are communicated with the upper part of the hollow column (12); the annular airbag (14) is commonly communicated with the sides of all the branch pipes (13) away from the hollow column (12); the annular airbag (14) is fixedly connected to the lower mold (5).

2. The trimming device for processing environmentally friendly plastic products according to claim 1, characterized in that: The power unit includes an electric actuator (6), a vertical rod (7), and an annular frame (8); two symmetrically arranged electric actuators (6) are installed on each upper mold (4); two vertical rods (7) are fixedly connected to the telescopic part of each electric actuator (6); all the vertical rods (7) of the same upper mold (4) are commonly fixedly connected to an annular frame (8); each annular frame (8) is fixedly connected to an annular trimming knife (9).

3. An edge trimming device for processing environmentally friendly plastic products according to claim 2, characterized in that: The side wall of the annular airbag (14) is flush with the side wall of the lower mold (5).

4. An edge trimming device for processing environmentally friendly plastic products according to claim 3, characterized in that: It also includes several elastic members (10) fixedly connected to the lower part of each annular frame (8); all the elastic members (10) on each annular frame (8) are commonly fixedly connected to an integral frame (11).

5. An edge trimming device for processing environmentally friendly plastic products according to claim 4, characterized in that: The upper part of the lower mold (5) is set as a supporting part (5001), and the lower part of the lower mold (5) is provided with a first stepped part (5002). The width of the upper side surface of the first stepped part (5002) is the same as the wall thickness of the plastic suction box body (001), and the step of the first stepped part (5002) is flush with the lower part of the annular airbag (14).

6. An edge trimming device for processing environmentally friendly plastic products according to claim 5, characterized in that: Several laser displacement sensors for detecting the surface flatness are arranged on the lower part of each integral frame (11).

7. An edge trimming device for processing environmentally friendly plastic products according to claim 6, characterized in that: Each integral frame (11) is provided with an annular heater (1101); each integral frame (11) is provided with a shaping part (1102); the shaping part (1102) is located above the heater (1101), and the shaping part (1102) is used to level the edge of the plastic suction box body (001) softened by the heater (1101).

8. An edge trimming device for processing environmentally friendly plastic products according to claim 7, characterized in that: It further includes respective sleeves (101) fixedly connected to each upper die (4); a first air pipe (102) is fixedly connected to the middle of each sleeve (101); each first air pipe (102) penetrates through the corresponding sleeve (101); an electromagnetic valve (103) is provided in each sleeve (101); a number of air holes are formed in each first air pipe (102), and the air holes are all located above the corresponding electromagnetic valve (103); each electromagnetic valve (103) is communicated with a number of second air pipes (104); all the second air pipes (104) on each upper die (4) penetrate through the sleeve (101); a second stepped portion (1103) is provided at the upper part of each integral frame (11); an annular air flow chamber (1104) is formed in each integral frame (11); an annular horizontal groove (1105) is formed on the inner side of each air flow chamber (1104), and a filter screen is provided on the side of the horizontal groove (1105) away from the air flow chamber (1104); the lower edge of each horizontal groove (1105) is flush with the lower part of the corresponding second stepped portion (1103); the lower parts of all the second air pipes (104) on each upper die (4) are jointly communicated with the air flow chamber (1104).

9. An edge trimming device for processing environmentally friendly plastic products according to claim 8, characterized in that: A number of supporting feet are provided at the lower part of the machine table (1), and an anti-slip pad is provided on each supporting foot.

10. An edge trimming device for processing environmentally friendly plastic products according to any one of claims 1-9, characterized in that: It further includes two electric guide rails (15) installed on the upper part of the machine table (1); two electric sliders (16) are slidably connected to each electric guide rail (15); a ceiling (17) is fixedly connected by all the electric sliders (16); the ceiling (17) is fixedly connected to two hydraulic rods (2).

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