A roll changing mechanism for film blowing machine
By designing an automated lifting and drop mechanism, the time-consuming and laborious problem of removing the shaft in the membrane blowing machine roll change mechanism is solved, the working efficiency is improved, and safety and stability are ensured through linkage components and buffer devices.
Patent Information
- Application Number
- CN202411328910.2
- Authority / Receiving Office
- CN · China
- Patent Type
- Patents(China)
- Current Assignee / Owner
- Filing Date
- 2024-09-24
- Publication Date
- 2024-12-17
- Estimated Expiration
- 2044-09-24
AI Technical Summary
The coiling mechanism of the existing film blowing machine needs to be lifted manually when removing the winding shaft after the film is removed, which makes the handling process time-consuming and labor-intensive and affects the working efficiency.
A coil-changing mechanism including a hoisting assembly, a start-stop button, a drop-stop assembly, a shading assembly, a start-stop assembly and a buffer assembly are designed. The coil-changing mechanism is automatically lifted and dropped and wound rolled through the motor drive and linkage mechanism to avoid manual operation, and Use shock absorbing springs to achieve stable landing.
Automatic reeling shaft lifting and falling is achieved, reducing the time and effort of manual operation, improving work efficiency, and ensuring safety and stability through protective plates and shock absorption measures.
Smart Images
Figure CN118850838B_ABST
Abstract
Description
Technical Field
[0001] The invention relates to the technical field of auxiliary tools for film blowing machines, in particular to a roll changing mechanism for film blowing machines. Background Art
[0002] The roll-changing mechanism of the film blowing machine is an important part of the film blowing production process. During the continuous production process of the film blowing machine, when the film roll on a winding shaft reaches the specified size, the roll-changing mechanism can automatically switch the film from the full winding shaft to the new empty winding shaft to achieve continuous production without stopping the machine and improve production efficiency. Its components usually include winding shaft, transmission device, switching device, etc. The winding shaft is used to wind the film; the transmission device provides power for the winding shaft; the switching device can accurately and quickly switch the winding shaft. When the roll needs to be changed, the switching device starts to guide the edge of the film to the new empty winding shaft, and the new winding shaft starts to rotate to wind the film, while the old winding shaft gradually stops working. The whole process needs to be precisely controlled to ensure the stability of the film tension and the winding quality.
[0003] At present, most of the film blowing machines on the market are automatically operated and can achieve non-stop continuous production. However, the inventor found that after the old take-up shaft stops working, the staff needs to lift it up so that it can be removed from the roll-changing mechanism for subsequent processing such as storage. The specifications of the take-up shaft after winding the film are large, which makes the process of moving it extremely time-consuming and labor-intensive, affecting its work efficiency. Summary of the invention
[0004] In view of the deficiencies of the prior art, the present invention provides a roll changing mechanism for a film blowing machine, which solves the problem in the prior art that removing the winding shaft after the wound film is extremely time-consuming and labor-intensive, thus affecting its working efficiency.
[0005] To achieve the above-mentioned purpose, the present invention provides the following technical solutions: a roll-changing mechanism for a film blowing machine, comprising a base frame, a replacement roller and a winding roller, and two mutually symmetrical side plates fixed on the base frame, wherein an auxiliary roller driven by a motor to realize film winding and a cutting assembly for cutting the film are arranged between the two side plates, and a falling assembly for causing the winding roller to fall is arranged between the two side plates, a base plate is fixed at the front end of the base frame, a lifting assembly for lifting the winding roller is arranged on the base plate, and a start-stop assembly for tilting the lifting assembly angle is arranged on the base frame, a start-stop button for opening or closing the lifting assembly is arranged on one side plate, when the falling assembly is in operation, the start-stop button will be prompted to work through the synchronization assembly, and protective assemblies for blocking the winding roller from falling are arranged on the opposite side walls of the two side plates, when the start-stop assembly is in operation, the protective assembly will be synchronously driven to move through the linkage assembly;
[0006] The lifting assembly includes two symmetrical partition seats fixed on the base plate, wherein a hollow fixed box is movably connected between the two partition seats, a reciprocating screw is rotatably arranged in the fixed box, and a servo motor is arranged on the side wall of the fixed box, bevel gears are arranged on the output end of the servo motor and the reciprocating screw, the two bevel gears are meshed with each other, and a threaded seat is threadedly connected to the reciprocating screw, wherein a lifting seat is installed on the threaded seat through a bracket, a fixed seat is arranged on the lifting seat, and plug plates that can lift the winding roller are arranged at both ends of the fixed seat.
[0007] Furthermore, the drop assembly includes a rotating rod rotatably arranged between two side plates, wherein two symmetrical drop plates are arranged on the rod body of the rotating rod, and a "U"-shaped groove is reserved on the drop plate to drive the winding roller to move, and an electric push rod is arranged on the inner wall of one side plate, wherein the free end of the electric push rod is installed on the corresponding drop plate through a movable shaft.
[0008] Furthermore, the synchronization component is a shielding component, which includes a rectangular opening on the side panel, a fixing rod is arranged in the opening, a slider is movably provided on the fixing rod, a same connecting rod is arranged between the slider and the corresponding drop plate through a hinge shaft, and a fastening rod passing through the opening is fixed to the front end of the slider, and a block for opening or closing the start-stop button is arranged at the end of the fastening rod.
[0009] Furthermore, the shielding assembly also includes a shielding plate arranged on the opposite side walls of the two side plates through a connecting shaft, a through opening is formed on the shielding plate, and a guide block passing through the through opening is preset on the corresponding sliding block.
[0010] Furthermore, the start-stop assembly includes a base fixed on the base frame, which is hollow inside and has no top cover. A guide screw driven by a motor is rotatably provided in the base. A sliding seat is threadedly connected to the guide screw. At least one second spur rack is fixed to the front end of the sliding seat. The same connecting rod is rotatably provided between the corresponding two partition seats and the fixed box, and a second gear that meshes with the second spur rack is provided on the connecting rod.
[0011] Furthermore, the protective assembly includes a first spur rack installed on the two side walls of the sliding seat through a connecting frame, and a sliding opening is reserved on the corresponding side plate for the movement of the connecting frame, and the opposite side walls of the two side plates are rotatably provided with a rotating shaft, and a first gear meshing with the first spur rack is provided on the rotating shaft, and a protective plate is also provided on the rotating shaft.
[0012] Furthermore, the cutting assembly includes fastening plates rotatably arranged at both ends of the auxiliary roller, and a placing plate is arranged on the two fastening plates through a movable shaft. A plurality of sliding rods are fixed between the two fastening plates, and the same cutting knife is movably arranged on the plurality of sliding rods. The cutting knife and one of the fastening plates are driven by an external device.
[0013] Furthermore, the base plate is also provided with a buffer component for mitigating the impact force of the winding roller falling, which includes a hollow buffer box without a top cover fixed on the base plate, a plurality of shock-absorbing springs are distributed in the buffer box, and the same buffer seat is fixed on the plurality of shock-absorbing springs, wherein the top of the buffer seat is in an arc shape.
[0014] Furthermore, a guide roller is rotatably provided between the two side plates.
[0015] Furthermore, the top front ends of the two side panels form an angle α with the horizontal plane, wherein the angle α is 5°. A fixed plate is provided at the front end of the side panel, and the fixed plate is in a side "T" shape, wherein the start / stop button is provided on the fixed plate, and a slope is reserved on the transverse plate of the fixed plate, thereby forming a placement area for placing the winding roller together with the fixed plate.
[0016] Compared with the prior art, the present invention provides a roll changing mechanism for a film blowing machine, which has the following beneficial effects:
[0017] 1. The present invention provides a lifting component and a start-stop button. When the original falling component is lowering the winding roller, the start-stop button will be turned on through the synchronization component. Therefore, the lifting component works normally to lift up the winding roller after the film has been wrapped, and cooperates with the subsequent work of the start-stop component to tilt the lifting component, so that the winding roller can be placed normally on the buffer component, avoiding the need for manual operation that is time-consuming and labor-intensive.
[0018] 2. The present invention provides a falling assembly and a shielding assembly. When the falling assembly drops the winding roller, it will gradually drive the slider to move through the connecting rod. During the movement of the slider, it will move in the opening through the guide block, so as to realize the angle change of the shielding plate, and further meet the purpose of shielding and protecting the winding roller during the rolling process. While the slider moves, it will gradually push the block to complete the effect of starting the start-stop button, and then synchronously realize the opening of the jacking assembly. The overall structure is compact and convenient for overall management.
[0019] 3. The present invention provides a start-stop assembly. After the lifting assembly completes the lifting of the winding roller, the rotation of the guide screw will drive the movement of the sliding seat, thereby completing the tilting action of the fixed box through the mutual engagement between the second spur rack and the second gear, and then completing the falling process of the winding roller. During this period, due to the mutual engagement between the first spur rack and the first gear, the protection plate will complete the rotation to ensure that the protection plate can completely block and protect the winding roller during its falling process, so as to prevent the winding roller from rolling out from both sides and injuring the staff.
[0020] 4. The present invention provides a buffer assembly so that the winding roller will directly fall onto the buffer seat during its falling process. The use of a shock-absorbing spring can achieve the purpose of shock-absorbing and buffering the winding roller, ensuring that the winding roller can land stably. BRIEF DESCRIPTION OF THE DRAWINGS
[0021] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the prior art descriptions are briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention, and for ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.
[0022] Figure 1 It is a schematic diagram of the overall structure of the present invention;
[0023] Figure 2 For the present invention Figure 1 A schematic diagram of a top view structure;
[0024] Figure 3 For the present invention Figure 1 Schematic diagram of the local structure (including the falling component and the shielding component);
[0025] Figure 4 It is a schematic diagram of the local driving structure of the present invention;
[0026] Figure 5 It is a structural schematic diagram of the jacking assembly and the start-stop assembly of the present invention;
[0027] Figure 6 It is a schematic diagram of the structure of the buffer assembly of the present invention;
[0028] Figure 7 For the present invention Figure 3 A schematic diagram of the structure enlargement at point A;
[0029] Figure 8 For the present invention Figure 3 A schematic diagram of the structure at B in FIG.
[0030] Fig. 9 For the present invention Figure 4A schematic diagram of the structure at position C in FIG.
[0031] Fig.10 For the present invention Figure 5 Schematic diagram of the enlarged structure at D in the figure.
[0032] In the figure: 1, chassis; 2, side plate; 3, bottom plate; 4, auxiliary roller; 5, cutting assembly; 501, fastening plate; 502, placing plate; 503, sliding rod; 504, cutting knife; 6, replacement roller; 7, winding roller; 8, falling assembly; 801, rotating rod; 802, falling plate; 803, electric push rod; 9, shielding assembly; 901, connecting rod; 902, sliding block; 903, fixing rod; 904, shielding plate; 905, through-hole; 906, guide block; 907, fastening rod; 908, stopper; 10, protection assembly; 1001, first straight rack; 1002, rotating shaft; 1003, first gear; 1004 , protective plate; 11, lifting assembly; 1101, fixed box; 1102, fixed seat; 1103, plug plate; 1104, partition seat; 1105, reciprocating screw; 1106, lifting seat; 1107, threaded seat; 1108, bevel gear; 1109, connecting rod; 1110, second gear; 12, start-stop assembly; 1201, base; 1202, guide screw; 1203, sliding seat; 1204, second spur rack; 13, buffer assembly; 1301, buffer box; 1302, shock-absorbing spring; 1303, buffer seat; 14, guide roller; 15, fixed plate; 16, start-stop button; 17, ramp DETAILED DESCRIPTION
[0033] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.
[0034] like Figure 1-Figure 10As shown, the present invention provides a technical solution: a roll changing mechanism for a film blowing machine, comprising a base frame 1, a replacement roller 6 and a winding roller 7, and two symmetrical side plates 2 fixed on the base frame 1, wherein the base frame 1 is welded by a plurality of square tubes to ensure its stability, a guide roller 14 is rotatably arranged between the two side plates 2, and the film blowing machine unloads the material through the guide roller 14 during the film unloading process to ensure the stability of the roll film, the top front ends of the two side plates 2 form an angle α with the horizontal plane, wherein the angle α is 5°, and the winding roller 7 passes through the drop assembly 8 When falling, the use of the angle α can ensure that the winding roller 7 rolls to the end on the side plate 2. A fixed plate 15 is provided at the front end of the side plate 2. The fixed plate 15 is in a side "T" shape, wherein the start-stop button 16 is provided on the fixed plate 15. A slope 17 is reserved on the transverse plate of the fixed plate 15. The slope of the slope 17 is also 5°, thereby forming a placement area for placing the winding roller 7 with the fixed plate 15, so that when the winding roller 7 rolls down at an angle, it will accumulate force to rush up the slope 17 to move in the placement area.
[0035] Further, refer to Figure 1 As shown, an auxiliary roller 4 driven by a motor to realize film winding, and a cutting assembly 5 for cutting the film are arranged between the two side plates 2. The slow rotation of the auxiliary roller 4 can complete the film winding operation. During the roll changing process, the roll changing and cutting work can be realized synchronously through the operation of the cutting assembly 5.
[0036] Among them, reference Figure 3 As shown, the cutting assembly 5 includes fastening plates 501 which are rotatably arranged at both ends of the auxiliary roller 4, and placing plates 502 are arranged on the two fastening plates 501 through movable shafts. A accommodating area is formed between the placing plates 502 and the fastening plates 501, which can ensure that the replacement roller 6 is placed on it. At the same time, during the roll changing process, the placing plates 502 connected to the movable shaft can complete the roll changing work of the replacement roller 6 when it contacts the falling plate 802, thereby ensuring the subsequent roll changing operation (this is a simple working principle of automatic roll changing). A number of slide bars 503 are fixed between the two fastening plates 501, and the same cutting knife 504 is movably arranged on the number of slide bars 503. The cutting knife 504 and one of the fastening plates 501 are driven by an external device. During the roll changing process, the external device drives the cutting knife 504 to move on the slide bar 503 to complete the cutting work.
[0037] Furthermore, a falling component 8 for lowering the winding roller 7 is provided between the two side plates 2, a bottom plate 3 is fixed to the front end of the base frame 1, a jacking component 11 for lifting the winding roller 7 is provided on the bottom plate 3, and a start-stop component 12 for tilting the angle of the jacking component 11 is provided on the base frame 1. After the jacking component 11 completes its work, the start-stop component 12 is started to change the angle of the jacking component 11, and then the falling operation of the winding roller 7 is completed to avoid the excessive weight of the winding roller 7 after the winding film is wrapped, which affects the operation of the staff. A start-stop button 16 for opening or closing the jacking component 11 is provided on one side plate 2. When the falling component 8 is in operation, the start-stop button 16 will be prompted to work through the synchronization component, and protective components 10 for blocking the falling of the winding roller 7 are provided on the opposite side walls of the two side plates 2. When the start-stop component 12 is in operation, the protective component 10 will be synchronously driven to move through the linkage component.
[0038] Among them, the falling component 8 includes a rotating rod 801 rotatably arranged between the two side plates 2, wherein two symmetrical falling plates 802 are arranged on the rod body of the rotating rod 801, and the mobility of the rotating rod 801 ensures that the falling plate 802 can be tilted at an angle, and a "U"-shaped groove is reserved on the falling plate 802 to drive the winding roller 7 to move, and the winding roller 7 can be placed at the "U"-shaped groove to complete the lifting of the winding roller 7 and the subsequent series of roll-changing operations, and an electric push rod 803 is provided on the inner wall of one side plate 2, wherein the free end of the electric push rod 803 is installed on the corresponding falling plate 802 through a movable shaft, and the electric push rod 803 can be pushed to drive the falling plate 802 to perform an angle tilting operation and complete the falling processing of the winding roller 7 at the same time.
[0039] Further, refer to Figure 3 and Figure 7As shown, the synchronization component is a shielding component 9, which includes a rectangular opening opened on the side panel 2, a fixing rod 903 is arranged in the opening, a slider 902 is movably arranged on the fixing rod 903, and a same connecting rod 901 is arranged between the slider 902 and the corresponding drop plate 802 through a hinge shaft. When the drop plate 802 changes its angle, the connecting rod 901 connected by the hinge shaft can complete the activity of the slider 902 on the fixing rod 903 when the drop plate 802 moves, and a fastening rod 907 passing through the opening is fixed to the front end of the slider 902, and a stopper 908 for opening or closing the start-stop button 16 is arranged at the end of the fastening rod 907. When block 902 moves, it will gradually drive block 908 to move through fastening rod 907. After block 908 contacts the start-stop button 16, the opening operation of the lifting assembly 11 is completed, and the shielding assembly 9 also includes a shielding plate 904 arranged on the opposite side walls of the two side panels 2 through a connecting shaft, and a through opening 905 is provided on the shielding plate 904. The corresponding slider 902 is preset with a guide block 906 passing through the through opening 905. During the movement of the slider 902, it will move in the through opening 905 through the guide block 906, thereby realizing the angle change of the shielding plate 904, further satisfying the purpose of shielding and protection during the rolling process of the winding roller 7.
[0040] Among them, the jacking component 11 includes two symmetrical partition seats 1104 fixed on the base plate 3, wherein the two partition seats 1104 are movably connected with an internal hollow fixed box 1101. It is worth noting that an inverted U-shaped frame is also provided at the bottom of the fixed box 1101, and a same connecting rod 1109 is rotatably provided between the two partition seats 1104 and the U-shaped frame of the fixed box 1101. A reciprocating screw rod 1105 is rotatably provided in the fixed box 1101, and a servo motor is provided on the side wall of the fixed box 1101. A bevel gear 1108 is provided on the output end of the servo motor and the reciprocating screw rod 1105. The two bevel gears 1108 are meshed with each other. When the start-stop button 16 is turned on, the servo motor will be started. The two bevel gears 1108 are meshed with each other to drive the reciprocating screw 1105 to rotate. A threaded seat 1107 is threadedly connected to the reciprocating screw 1105, wherein a lifting seat 1106 is installed on the threaded seat 1107 through a bracket, and a fixed seat 1102 is arranged on the lifting seat 1106, and a notch is provided at the top of the corresponding fixed seat 1102 to facilitate the passage of the lifting seat 1106, and plug plates 1103 that can lift the winding roller 7 are provided at both ends of the fixed seat 1102. When the reciprocating screw 1105 rotates, the threaded seat 1107 is driven to be lifted and lowered, thereby driving the fixed seat 1102 to move through the lifting seat 1106, and the plug plates 1103 are used to lift the winding roller 7.
[0041] Further, refer to Figure 5 and Fig.10 As shown, the start-stop component 12 includes a base 1201 which is fixed on the bottom frame 1 and is hollow inside and has no top cover. A guide screw rod 1202 driven by a motor is rotatably arranged in the base 1201. A sliding seat 1203 is threadedly connected to the guide screw rod 1202. Two second spur racks 1204 are fixed to the front end of the sliding seat 1203. When the motor is driving, the guide screw rod 1202 starts to rotate, thereby driving the sliding seat 1203 to start moving. Synchronously, the second spur rack 1204 moves radially. A second gear 1110 which is meshed with the second spur rack 1204 is provided on the connecting rod 1109. Since the second spur rack 1204 and the second gear 1110 are meshed with each other, the connecting rod 1109 is driven to rotate through the second gear 1110 to complete the angle change on the fixed box 1101, and then complete the falling process of the winding roller 7.
[0042] Among them, the protection component 10 includes a first spur rack 1001 installed on the two side walls of the sliding seat 1203 through a connecting frame, and a sliding opening for the connecting frame to move is reserved on the corresponding side panel 2. The connecting frame passes through the sliding opening, and the opposite side walls of the two side panels 2 are rotatably provided with a rotating shaft 1002, and a first gear 1003 meshing with the first spur rack 1001 is provided on the rotating shaft 1002, and a protective plate 1004 is also provided on the rotating shaft 1002. When the sliding seat 1203 moves, the first spur rack 1001 installed through the connecting frame will move synchronously, and by utilizing the meshing of the first gear 1003 and the first spur rack 1001, the first gear 1003 will drive the protective plate 1004 to rotate through the rotating shaft 1002, so as to ensure that during the falling process of the winding roller 7, the protective plate 1004 can completely block and protect it, so as to prevent the winding roller 7 from rolling out from both sides and injuring the staff.
[0043] Furthermore, a buffer component 13 for mitigating the impact force of the winding roller 7 falling is also provided on the base plate 3, which includes a buffer box 1301 which is hollow inside and has no top cover and is fixed on the base plate 3, and a plurality of shock-absorbing springs 1302 are distributed in the buffer box 1301, and a same buffer seat 1303 is fixed on the plurality of shock-absorbing springs 1302, wherein the top of the buffer seat 1303 is in an arc shape, and when the winding roller 7 falls on the jacking assembly 11 by the start-stop assembly 12, it will directly fall onto the buffer seat 1303, and the use of the shock-absorbing spring 1302 can achieve the purpose of shock-absorbing and buffering the winding roller 7, thereby ensuring that the winding roller 7 can land stably.
[0044] When the present embodiment is working, after the cutting assembly 5 completes its work, the electric push rod 803 can be used to push the drop plate 802 to perform an angle tilting operation, and at the same time, the winding roller 7 can be dropped. When the winding roller 7 tilts and rolls down, it will accumulate force to rush up the slope 17 to move in the placement area. At the same time, when the drop plate 802 changes its angle, the connecting rod 901 connected by the hinge shaft can complete the activity of the slider 902 on the fixed rod 903 when the drop plate 802 moves. When the slider 902 moves, it will gradually drive the stopper 908 to move through the fastening rod 907, and the stopper After 908 contacts the start-stop button 16, the opening operation of the lifting assembly 11 is completed. During the movement of the slider 902, the guide block 906 will move in the through port 905, so as to realize the angle change of the shielding plate 904, further satisfying the purpose of shielding and protecting the winding roller 7 during the rolling process. The opening of the start-stop button 16 will start the servo motor, and the two bevel gears 1108 will be engaged with each other to drive the rotation of the reciprocating screw 1105. When the reciprocating screw 1105 rotates, it will drive the threaded seat 1107 to perform a lifting operation, thereby using the lifting seat 1106 to The fixing seat 1102 is driven to move, and the plug plate 1103 is used to lift the winding roller 7. After the lifting is completed, the guide wire rod 1202 starts to rotate by the drive of the motor, thereby driving the sliding seat 1203 to start moving. Synchronously, the second spur rack 1204 moves radially. Since the second spur rack 1204 and the second gear 1110 are meshed with each other, the connecting rod 1109 is driven to rotate through the second gear 1110 to complete the angle change on the fixing box 1101, and then the winding roller 7 is lowered. In this process, when the sliding seat 1203 moves, the connecting rack installed by the connecting rack The first spur rack 1001 will move synchronously, and by virtue of the meshing of the first gear 1003 and the first spur rack 1001, the first gear 1003 will drive the protective plate 1004 to rotate via the rotating shaft 1002, thereby ensuring that during the falling process of the winding roller 7, the protective plate 1004 can completely shield and protect it, and prevent the winding roller 7 from rolling out from both sides and injuring the staff. When the winding roller 7 falls on the jacking assembly 11 through the start-stop assembly 12, it will directly fall onto the buffer seat 1303, and the use of the shock-absorbing spring 1302 can achieve the purpose of shock-absorbing and buffering the winding roller 7, ensuring that the winding roller 7 can land stably.
[0045] The above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or make equivalent replacements for some of the technical features therein. However, these modifications or replacements will not cause the essence of the corresponding technical solutions to deviate from the protection scope of the technical solutions of the embodiments of the present invention.
Claims
1. A roll-changing mechanism for a film blowing machine, comprising a base frame (1), a replacement roller (6) and a winding roller (7), and two symmetrical side plates (2) fixed to the base frame (1), wherein an auxiliary roller (4) driven by a motor to achieve film winding and a cutting assembly (5) for cutting the film are arranged between the two side plates (2), and a dropping assembly (8) for dropping the winding roller (7) is arranged between the two side plates (2), characterized in that: A bottom plate (3) is fixed to the front end of the base frame (1), a lifting assembly (11) for lifting the winding roller (7) is provided on the bottom plate (3), and a start-stop assembly (12) for tilting the lifting assembly (11) is provided on the base frame (1), a start-stop button (16) for opening or closing the lifting assembly (11) is provided on one side plate (2), when the falling assembly (8) is in operation, the start-stop button (16) is driven to operate through a synchronization assembly, and protective assemblies (10) for shielding the winding roller (7) from falling are provided on opposite side walls of the two side plates (2), and when the start-stop assembly (12) is in operation, the protective assembly (10) is synchronously driven to move through a linkage assembly; The lifting assembly (11) comprises two symmetrical partition seats (1104) fixed on the bottom plate (3), wherein an internally hollow fixed box (1101) is movably connected between the two partition seats (1104), a reciprocating screw (1105) is rotatably arranged in the fixed box (1101), and a servo motor is arranged on the side wall of the fixed box (1101), and a bevel gear (1108) is arranged on the output end of the servo motor and the reciprocating screw (1105), and the two bevel gears (1108) are meshed with each other, and a threaded seat (1107) is threadedly connected to the reciprocating screw (1105), wherein a lifting seat (1106) is mounted on the threaded seat (1107) via a bracket, and a fixed seat (1102) is arranged on the lifting seat (1106), and plug plates (1103) capable of lifting the winding roller (7) are arranged at both ends of the fixed seat (1102); The drop assembly (8) comprises a rotating rod (801) rotatably arranged between two side plates (2), wherein two symmetrical drop plates (802) are arranged on the rod body of the rotating rod (801), a "U"-shaped notch is reserved on the drop plate (802) for driving the winding roller (7) to move, and an electric push rod (803) is arranged on the inner side wall of one side plate (2), wherein the free end of the electric push rod (803) is mounted on the corresponding drop plate (802) via a movable shaft; The synchronization component is a shielding component (9), which includes a rectangular opening formed on a side panel (2), a fixing rod (903) being arranged in the opening, a slider (902) being movably arranged on the fixing rod (903), a connecting rod (901) being arranged between the slider (902) and the corresponding drop plate (802) via a hinge axis, a fastening rod (907) passing through the opening being fixed at the front end of the slider (902), and a stopper (908) for opening or closing the start / stop button (16) being arranged at the end of the fastening rod (907).
2. The roll changing mechanism for a film blowing machine according to claim 1, characterized in that: The shielding assembly (9) further comprises a shielding plate (904) arranged on opposite side walls of the two side plates (2) via a connecting shaft, a through opening (905) being provided on the shielding plate (904), and a guide block (906) passing through the through opening (905) being preset on the corresponding sliding block (902).
3. The roll changing mechanism for a film blowing machine according to claim 1, characterized in that: The start-stop assembly (12) comprises a base (1201) fixed on the bottom frame (1) and having a hollow interior and no top cover. A guide screw (1202) driven by a motor is rotatably arranged inside the base (1201). A sliding seat (1203) is threadedly connected to the guide screw (1202). At least one second spur rack (1204) is fixed to the front end of the sliding seat (1203). A common connecting rod (1109) is rotatably arranged between the two corresponding partition seats (1104) and the fixed box (1101). A second gear (1110) meshing with the second spur rack (1204) is arranged on the connecting rod (1109).
4. The roll changing mechanism for a film blowing machine according to claim 3, characterized in that: The protection assembly (10) comprises first spur racks (1001) mounted on both side walls of the sliding seat (1203) via connecting frames, a sliding opening for the connecting frames to move is reserved on the corresponding side panels (2), and opposite side walls of the two side panels (2) are rotatably provided with rotating shafts (1002), a first gear (1003) meshing with the first spur racks (1001) is provided on the rotating shaft (1002), and a protection plate (1004) is also provided on the rotating shaft (1002).
5. The roll changing mechanism for a film blowing machine according to claim 1, characterized in that: The cutting assembly (5) comprises fastening plates (501) rotatably arranged at both ends of the auxiliary roller (4), a placing plate (502) being arranged on the two fastening plates (501) via a movable shaft, a plurality of sliding bars (503) being fixed between the two fastening plates (501), a same cutting knife (504) being movably arranged on the plurality of sliding bars (503), and the cutting knife (504) and one of the fastening plates (501) being driven by an external device.
6. The roll changing mechanism for a film blowing machine according to claim 4, characterized in that: The bottom plate (3) is also provided with a buffer assembly (13) for mitigating the impact force of the winding roller (7) falling, and includes a buffer box (1301) fixed on the bottom plate (3) and having a hollow interior and no top cover, wherein a plurality of shock absorbing springs (1302) are distributed in the buffer box (1301), and a common buffer seat (1303) is fixed on the plurality of shock absorbing springs (1302), wherein the top of the buffer seat (1303) is in an arc shape.
7. The roll changing mechanism for a film blowing machine according to claim 5, characterized in that: A guide roller (14) is rotatably provided between the two side plates (2).
8. The roll changing mechanism for a film blowing machine according to claim 5, characterized in that: The top front ends of the two side panels (2) form an angle α with the horizontal plane, wherein the angle α is 5°. A fixing plate (15) is provided at the front end of the side panel (2), wherein the fixing plate (15) presents a side "T" shape, wherein the start / stop button (16) is provided on the fixing plate (15), and a slope (17) is reserved on the transverse plate of the fixing plate (15), thereby forming a placement area for placing the winding roller (7) with the fixing plate (15).