A transverse stretching device and method for nylon film

Abstract

This invention relates to the field of nylon film processing technology, and in particular to a transverse stretching device and method for nylon films. The device includes a processing table, with shielding frames fixedly connected to both sides of the top of the processing table. Each shielding frame contains a support plate, which is fixedly connected to the top of the processing table. Multiple clamping fixtures are positioned above each support plate. This invention uses a moving stretching mechanism to transversely stretch the nylon film at its clamping position, and releases the clamping of the nylon film's sides after stretching. Thus, during the movement and conveying of the nylon film, the unidirectional cyclic movement of multiple clamping fixtures continuously stretches the sides of the nylon film, thereby improving the stretching efficiency and automation of the transverse stretching process, and reducing the need for manpower.

Description

Technical Field

[0001] The invention relates to the technical field of nylon film processing, and in particular to a transverse stretching device and method for nylon film. Background Art

[0002] Biaxially oriented nylon film is an important material for producing various composite packaging materials. Biaxially oriented nylon film needs to be biaxially stretched during the production process, and its stretching stage needs to go through two stages: longitudinal stretching and then transverse stretching.

[0003] The patent document with publication number CN221365838U discloses a transverse stretching device for nylon film, including a base, a sliding stretching device is arranged inside the base, a bracket is fixedly arranged on the top of the base, a clamping device is arranged on the side wall of the bracket, a hot air blower is connected to the top of the bracket by bolts, a hot air pipe is welded to the top of the bracket, and one end of the hot air pipe is connected to the hot air blower.

[0004] In the prior art, when transversely stretching a nylon film, a stretching roller is usually used to clamp and stretch the nylon film. However, in the actual operation, the nylon film needs to be limited and then stretched at the limited position. When the length of the nylon film is long, it is necessary to manually limit the position multiple times and repeat the stretching operation, which affects the stretching efficiency of the nylon film and reduces the degree of automation of the transverse stretching of the nylon film. Summary of the invention

[0005] The purpose of the present invention is to solve the shortcomings of the prior art and to propose a transverse stretching device and method for nylon film.

[0006] To achieve the above purpose, the technical solution adopted by the present invention is: a transverse stretching device for nylon film, comprising a processing table, both sides of the top of the processing table are fixedly connected with a shielding frame, the inside of the shielding frame is provided with a support plate, the support plate is fixedly connected to the top of the processing table, a plurality of clamping fixtures are arranged above the support plate, the clamping fixtures are connected with a film clamping mechanism, and the support plate is connected with a circulating conveying mechanism;

[0007] A movable stretching mechanism is connected to the shielding frame, and the clamping tool is driven to move by a circulating conveying mechanism. During the movement, the side of the nylon film is clamped and fixed by the film clamping mechanism, and then the clamping tool is driven by the movable stretching mechanism to stretch the nylon film laterally. Both ends of the processing table are connected to film conveying mechanisms.

[0008] Preferably, the circulating conveying mechanism includes an annular slide rail, which is fixedly connected to the top of the support plate, and a plurality of slide seats are slidably mounted on the annular slide rail. A sliding bar is fixedly connected to the top of the slide seat, and the clamping tool is slidably connected to the corresponding sliding bar.

[0009] Preferably, the movable stretching mechanism includes two guide rails, and the two guide rails are respectively fixedly connected to the inside of the two shielding frames, and the guide rails include a limit section, an inclined section and a return section, and the inclined section and the return section are close to the adjacent side of the two annular slide rails. One side of the clamping tool is fixedly connected with a mounting bar, and the top of the mounting bar is fixedly connected with two mounting shafts, and the mounting shafts are rotatably connected to limit rollers, and the two adjacent limit rollers are located on both sides of the corresponding guide rails.

[0010] Preferably, the film clamping mechanism includes a movable groove, the movable groove is opened on one side of the clamping tool, a movable plate is arranged on the top surface inside the movable groove, two circular pins are fixedly connected inside the movable groove, the circular pins are slidably inserted on the movable plate, the circular pins are sleeved with a first spring, the first spring is fixedly connected between the movable plate and the bottom surface inside the movable groove, one side of the movable plate extends to the outside of the movable groove and is fixedly connected with an upper clamping claw, one side of the clamping tool is fixedly connected with a fixing strip, one side of the fixing strip is fixedly connected with a lower clamping claw, and the other side of the clamping tool is provided with a fixing frame, The fixing frame is slidably provided with two limit pins, and the limit pins are fixedly connected to the clamping fixture, and a second spring is sleeved on the limit pin, and the second spring is fixedly connected between the fixing frame and an end of the limit pin away from the clamping fixture, and a baffle is fixedly connected to the interior of the fixing frame, and one end of the baffle passes through the clamping fixture and extends to the interior of the movable groove and is located at the bottom of the movable plate, and a guiding inclined surface is provided at one end of the baffle located at the bottom of the movable plate, and a first circular plate is provided on one side adjacent to the two shielding frames, and the first circular plate is located on one side of the intersection of the limit section and the inclined section.

[0011] Preferably, the top of the fixed frame is fixedly connected with a connecting strip, the top of the connecting strip is fixedly connected with a circular column, the top surface inside the shielding frame is fixedly connected with a fixing rod, the fixing rod is fixedly connected with a second circular plate, and the second circular plate is located above the intersection of the inclined section and the return section.

[0012] Preferably, the top of the shielding frame is fixedly connected to a limiting shell, the interior of the limiting shell is slidably connected to a mounting plate, one end of the mounting plate is fixedly connected to the corresponding first circular plate, and a hydraulic cylinder is fixedly installed on the top of the limiting shell, the piston shaft of the hydraulic cylinder passes through the limiting shell and extends to the interior of the limiting shell and is fixedly connected to the corresponding top of the mounting plate.

[0013] Preferably, the film conveying mechanism includes two mounting frames, which are respectively fixedly connected to the two ends of the processing table, and the interiors of the mounting frames are rotatably connected to two rotating shafts, and the rotating shafts are fixedly connected to conveying rollers, and the mounting frames are connected to opposite rotating mechanisms.

[0014] Preferably, the oppositely rotating mechanism comprises a motor, the motor is fixedly mounted on the mounting frame, the output shaft of the motor is fixedly connected to one end of one of the rotating shafts, the other ends of the two rotating shafts are fixedly connected to gears, and the two gears are meshed with each other.

[0015] Preferably, a first heating plate is fixedly installed between the two shielding frames, and a second heating plate is fixedly installed between the two supporting plates, and heating ends of the first heating plate and the second heating plate are arranged opposite to each other.

[0016] A stretching method for a transverse stretching device for a nylon film, the method comprising the following steps:

[0017] Step 1: The nylon film is moved and transported by the film transport mechanism so that the nylon film moves between the two shielding frames;

[0018] Step 2: The cyclic conveying mechanism is used to make the clamping fixtures on the two support plates move unidirectionally along the moving direction of the nylon film and maintain the same moving speed as the nylon film;

[0019] Step 3: When the clamping tool on the support plate moves to one side of the nylon film, the corresponding side of the nylon film is clamped by the film clamping mechanism, and in the process of synchronous movement with the nylon film, the clamping position of the nylon film is laterally stretched by the moving stretching mechanism.

[0020] Compared with the prior art, the present invention has the following beneficial effects:

[0021] 1. The clamping position of the nylon film is stretched transversely by the action of the mobile stretching mechanism, and the clamping of the side of the nylon film is released after the stretching is completed. Therefore, during the process of moving and conveying the nylon film, the side of the nylon film is continuously stretched transversely by the unidirectional circular movement of multiple clamping fixtures, thereby improving the stretching efficiency of the nylon film and the degree of automation of transverse stretching, and reducing the demand for human resources.

[0022] 2. The two adjacent limit rollers are guided and limited by the inclined section, so that the clamping tooling slides laterally along the corresponding sliding strip, so that the two sides of the nylon film are bidirectionally stretched laterally by the corresponding clamping tooling, and the stretching distance is gradually increased along the trajectory of the inclined section, so that the stretching degree of the nylon film is gradually increased. When the two adjacent limit rollers move along the inclined section to the corresponding return section, the clamping effect of the clamping tooling on the nylon film is released, and when the limit roller moves from the return section to the limit section, the clamping tooling slides to the initial position along the corresponding mounting strip, which is convenient for the clamping tooling to perform the next cycle stretching.

[0023] 3. When the movable plate moves to the bottom of one end of the baffle, the upper clamp and the lower clamp clamp the side of the nylon film. At the same time, one end of the baffle loses the obstruction of the movable plate, and under the elastic extension of the second spring, one end of the baffle re-enters the movable groove and is located at the top of the movable plate to limit the upward movement of the movable plate. After the movable plate is detached from the bottom of the first circular plate, the upper clamp and the lower clamp maintain the clamping limit on the side of the film.

[0024] 4. After losing the obstruction of the baffle, the top of the movable plate moves upward and returns to the initial position through the elastic extension of the first spring, and releases the upper and lower clamping jaws to maintain the clamping limit on the side of the film. After the circular column passes through the surface of the second circular plate, the elastic extension of the second spring causes one end of the baffle to re-enter the movable groove and re-position at the bottom of the movable plate. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Figure 1 It is a structural schematic diagram of the present invention;

[0026] Figure 2 For the present invention Figure 1 A schematic diagram of the structure enlargement at point A;

[0027] Figure 3 For the present invention Figure 1 A schematic diagram of the structure at B in FIG.

[0028] Figure 4 It is a partial structural schematic diagram of the present invention (the shielding frame on one side of the first heating plate and the second heating plate is hidden);

[0029] Figure 5 For the present invention Figure 4 A schematic diagram of the structure at position C in FIG.

[0030] Figure 6 It is a schematic diagram of the matching structure of the shielding frame, the guide rail and the second circular plate of the present invention;

[0031] Figure 7 For the present invention Figure 6 A schematic diagram of the structure at D in FIG.

[0032] Figure 8 It is a schematic diagram of the matching structure of the support plate and the annular slide rail of the present invention;

[0033] Fig. 9 It is a schematic diagram of a first matching structure of the clamping fixture, the sliding seat and the sliding bar of the present invention;

[0034] Fig.10 It is a schematic diagram of the second matching structure of the clamping fixture, the sliding seat and the sliding bar of the present invention;

[0035] Fig.11 It is a cross-sectional schematic diagram of the matching structure of the clamping fixture, movable plate and baffle bar of the present invention.

[0036] In the figure: 1, processing table; 2, shielding frame; 3, support plate; 4, clamping tool; 5, annular slide rail; 6, slide seat; 7, sliding bar; 8, guide rail; 801, limit section; 802, tilting section; 803, return section; 9, installation bar; 10, installation shaft; 11, limit roller; 12, movable groove; 13, movable plate; 14, round pin; 15, first spring; 16, upper clamping jaw; 17, fixing bar; 18, Lower clamping jaw; 19, fixed frame; 20, limit pin; 21, second spring; 22, stop bar; 23, first circular plate; 24, connecting bar; 25, circular column; 26, fixed rod; 27, second circular plate; 28, limit shell; 29, mounting plate; 30, hydraulic cylinder; 31, mounting frame; 32, rotating shaft; 33, conveying roller; 34, motor; 35, gear; 36, first heating plate; 37, second heating plate. DETAILED DESCRIPTION

[0037] The following description is used to disclose the present invention so that those skilled in the art can implement the present invention. The preferred embodiments described below are only examples, and those skilled in the art may think of other obvious variations.

[0038] like Figures 1 to 11A transverse stretching device for nylon film shown in the figure comprises a processing table 1, shielding frames 2 are fixedly connected to both sides of the top of the processing table 1, support plates 3 are arranged inside the shielding frames 2, the support plates 3 are fixedly connected to the top of the processing table 1, a plurality of clamping fixtures 4 are arranged above the support plates 3, the clamping fixtures 4 are connected to film clamping mechanisms, and the support plates 3 are connected to a circulating conveying mechanism;

[0039] A mobile stretching mechanism is connected to the shielding frame 2, which is driven by a circulating conveying mechanism to move the clamping tool 4, and during the movement, the side of the nylon film is clamped and fixed by the film clamping mechanism, and then the clamping tool 4 is driven by the mobile stretching mechanism to stretch the nylon film transversely. Both ends of the processing table 1 are connected with film conveying mechanisms; during operation, the prior art usually uses stretching rollers to clamp and stretch the nylon film when transversely stretching the nylon film, but in the actual operation process, the nylon film needs to be limited and then stretched at the limited position. When the length of the nylon film is long, it is necessary to manually limit the position multiple times and repeat the stretching operation, which affects the stretching efficiency of the nylon film and reduces the degree of automation of the transverse stretching of the nylon film; the technical solution can solve the above problems, and the specific working method is as follows: the nylon film is stretched by a film conveying mechanism The nylon film is moved and conveyed between the two shielding frames 2, and then the clamping fixtures 4 on the two support plates 3 are moved unidirectionally and cyclically along the moving direction of the nylon film through the action of the circular conveying mechanism, and maintain the same moving speed as the nylon film. When the clamping fixture 4 on the support plate 3 moves to one side of the nylon film, the corresponding side of the nylon film is clamped through the action of the film clamping mechanism, and in the process of synchronous movement with the nylon film, the clamping position of the nylon film is transversely stretched through the action of the mobile stretching mechanism, and the clamping of the side of the nylon film is released after the stretching is completed, so that in the process of moving and conveying the nylon film, the side of the nylon film is continuously stretched transversely through the unidirectional circular movement of multiple clamping fixtures 4, thereby improving the stretching efficiency of the nylon film and the degree of automation of the transverse stretching, and reducing the demand for human resources.

[0040] As a further embodiment of the present invention, the circulating conveying mechanism comprises an annular slide rail 5, the annular slide rail 5 (such as Figure 8As shown in the figure, it is fixedly connected to the top of the support plate 3, and multiple slide seats 6 are slidably installed on the annular slide rail 5. A sliding bar 7 is fixedly connected to the top of the slide seat 6, and the clamping fixture 4 is slidably connected to the corresponding sliding bar 7. When working, the slide seat 6 is slidably limited by the annular slide rail 5, so that the multiple slide seats 6 move in a one-way cycle along the trajectory of the annular slide rail 5, thereby driving the corresponding sliding bar 7 to move synchronously, and through the sliding connection between the sliding bar 7 and the clamping fixture 4, the multiple clamping fixtures 4 move in a one-way cycle above the support plate 3, and maintain the same moving direction and speed as the nylon film.

[0041] As a further embodiment of the present invention, the mobile stretching mechanism comprises two guide rails 8, the two guide rails 8 (such as Figure 6 8, and the guide rail 8 includes a limit section 801, an inclined section 802 and a return section 803. The inclined section 802 and the return section 803 are close to the adjacent side of the two annular slide rails 5. One side of the clamping fixture 4 is fixedly connected with a mounting bar 9. The top of the mounting bar 9 is fixedly connected with two mounting shafts 10. The mounting shafts 10 are rotatably connected with limit rollers 11. The two adjacent limit rollers 11 are located on both sides of the corresponding guide rail 8. When working, when the slide 6 moves along the trajectory of the annular slide rail 5 and drives the corresponding slide bar 7 to move synchronously, the clamping fixture 4 moves with the slide bar 7, and is rotatably limited on both sides of the guide rail 8 by the two limit rollers 11 on the mounting bar 9, thereby guiding and limiting the position between the clamping fixture 4 and the corresponding slide bar 7, so that when the clamping fixture 4 moves along the trajectory of the annular slide rail 5, the limit rollers 11 are connected to the guide rail 8. The contact friction rotates on the corresponding installation shaft 10. When the clamping tool 4 moves to one side of the nylon film along the trajectory of the annular slide rail 5, the corresponding side of the nylon film is clamped by the action of the film clamping mechanism, and then the two adjacent limiting rollers 11 are guided and limited by the inclined section 802, so that the clamping tool 4 slides laterally along the corresponding sliding bar 7, so that the two sides of the nylon film are respectively stretched bidirectionally by the corresponding clamping tool 4, and the stretching distance is gradually increased along the trajectory of the inclined section 802, so that the stretching degree of the nylon film is gradually increased, and when the two adjacent limiting rollers 11 move along the inclined section 802 to the corresponding return section 803, the clamping effect of the clamping tool 4 on the nylon film is released, and when the limiting roller 11 moves from the return section 803 to the limiting section 801, the clamping tool 4 slides to the initial position along the corresponding installation bar 9, which is convenient for the clamping tool 4 to perform the next cycle stretching.

[0042] As a further embodiment of the present invention, the film clamping mechanism includes a movable groove 12 (such as Fig. 9As shown in the figure, the movable groove 12 is opened on one side of the clamping tool 4, and a movable plate 13 is arranged on the top surface of the movable groove 12. Two round pins 14 are fixedly connected to the inside of the movable groove 12. The round pins 14 are slidably inserted on the movable plate 13. The round pins 14 are sleeved with a first spring 15. The first spring 15 is fixedly connected between the movable plate 13 and the bottom surface of the movable groove 12. One side of the movable plate 13 extends to the outside of the movable groove 12 and is fixedly connected with an upper clamping claw 16. One side of the clamping tool 4 is fixedly connected with a fixing strip 17, and one side of the fixing strip 17 is fixedly connected with a lower clamping claw 18. The other side of the clamping tool 4 is provided with a fixing frame 19 (as shown in the figure). Fig.10 As shown in the figure, two limit pins 20 are slidably inserted on the fixed frame 19, and the limit pins 20 are fixedly connected to the clamping fixture 4. A second spring 21 is sleeved on the limit pin 20, and the second spring 21 is fixedly connected between the fixed frame 19 and the end of the limit pin 20 away from the clamping fixture 4. A stop bar 22 is fixedly connected inside the fixed frame 19, and one end of the stop bar 22 passes through the clamping fixture 4 and extends to the inside of the movable groove 12 and is located at the bottom of the movable plate 13. A guide is provided at one end of the stop bar 22 located at the bottom of the movable plate 13 The first circular plate 23 is disposed on one side adjacent to the two shielding frames 2, and the first circular plate 23 is located on one side where the limiting section 801 and the inclined section 802 meet. When the limiting roller 11 moves from the limiting section 801 to the inclined section 802, the clamping tool 4 moves toward the side of the nylon film and makes the side of the nylon film located between the upper clamping jaw 16 and the lower clamping jaw 18. The bottom of the first circular plate 23 is contacted and squeezed with the top of the corresponding movable plate 13, so that the movable plate 13 is inserted along the sliding of the circular pin 14. The movable plate 13 moves downward and squeezes the first spring 15 to produce compression deformation, so that the movable plate 13 drives the upper clamping claw 16 to move downward and approach the lower clamping claw 18, thereby clamping the side of the nylon film. When the movable plate 13 moves downward, it contacts and squeezes the guiding inclined surface at one end of the stop bar 22, so that one end of the stop bar 22 moves to make way and exit the movable groove 12 along the through position. During the movement, the stop bar 22 drives the fixed frame 19 to move synchronously along the sliding insertion of the limit pin 20 and squeezes the second spring 21 to produce Compression deformation, when the movable plate 13 moves to the bottom of one end of the baffle 22, the upper clamp 16 and the lower clamp 18 clamp the side of the nylon film, and at the same time, one end of the baffle 22 loses the obstruction of the movable plate 13, and under the elastic extension of the second spring 21, one end of the baffle 22 re-enters the movable groove 12 and is located at the top of the movable plate 13 to limit the movable plate 13 from moving upward, so that the movable plate 13 is detached from the bottom of the first circular plate 23, and the upper clamp 16 and the lower clamp 18 maintain the clamping limit on the side of the film.

[0043] As a further embodiment of the present invention, the top of the fixed frame 19 is fixedly connected to a connecting strip 24, the top of the connecting strip 24 is fixedly connected to a circular column 25, the top surface of the shielding frame 2 is fixedly connected to a fixing rod 26, and the fixing rod 26 is fixedly connected to a second circular plate 27 (such as Figure 5 and Figure 7 As shown in the figure, the second circular plate 27 is located above the intersection of the inclined section 802 and the return section 803; when working, when the limiting roller 11 moves from the inclined section 802 to the return section 803, the circular column 25 on the connecting bar 24 contacts and squeezes the second circular plate 27, and in the process of contact, the circular column 25 is moved by the arc surface of the second circular plate 27, and the connecting bar 24 is driven to move, so that the corresponding fixed frame 19 moves synchronously along the sliding insertion of the limiting pin 20, and squeezes the second spring 21 to generate a pressure The first spring 15 is used to elastically extend the first spring 15, and the first spring 21 is used to elastically extend the second spring 21, so that the first spring 15 can retract the first spring 15 and retract the second spring 21 to re-enter the movable groove 12 and re-position the first spring 15.

[0044] As a further implementation scheme of the present invention, the top of the shielding frame 2 is fixedly connected to a limit housing 28, and a mounting plate 29 is slidably connected inside the limit housing 28. One end of the mounting plate 29 is fixedly connected to the corresponding first circular plate 23. A hydraulic cylinder 30 is fixedly installed on the top of the limit housing 28. The piston shaft of the hydraulic cylinder 30 passes through the limit housing 28 and extends to the inside of the limit housing 28 and is fixedly connected to the top of the corresponding mounting plate 29. When working, the mounting plate 29 is driven to move upward along the sliding connection inside the limit housing 28 by the upward movement of the piston shaft of the hydraulic cylinder 30, thereby moving the first circular plate 23 upward, so that the first circular plate 23 does not contact the movable plate 13, thereby preventing When the movable plate 13 passes through the bottom of the first circular plate 23, the upper clamping jaw 16 and the lower clamping jaw 18 clamp the side of the film, so that when the film is prepared before being transversely stretched, one end of the film can pass between the corresponding upper clamping jaw 16 and the lower clamping jaw 18, and when the film is moved and transported, the piston shaft of the hydraulic cylinder 30 moves downward and moves the first circular plate 23 to the initial position, and the upper clamping jaw 16 and the lower clamping jaw 18 that move through the first circular plate 23 clamp the side of the film; thereby reducing the empty clamping length of the film generated in the initial process, improving the utilization rate of the film processing, and reducing the contact obstruction caused by the upper clamping jaw 16 and the lower clamping jaw 18 to the movement of the film during the initial movement of the film.

[0045] As a further embodiment of the present invention, the film conveying mechanism includes two mounting frames 31, and the two mounting frames 31 are respectively fixedly connected to the two ends of the processing table 1, and the interior of the mounting frames 31 is rotatably connected to two rotating shafts 32, and the rotating shafts 32 are fixedly connected to conveying rollers 33, and the mounting frames 31 are connected to opposite rotating mechanisms; when working, one end of the film is passed through two adjacent conveying rollers 33 in turn, and the two adjacent rotating shafts 32 are rotated towards each other through the action of the opposite rotating mechanism, so that the conveying rollers 33 rotate synchronously, and the film is moved and conveyed on the top of the processing table 1 through the contact friction between the conveying rollers 33 and the surface of the film.

[0046] As a further implementation scheme of the present invention, the opposite rotation mechanism includes a motor 34, which is fixedly mounted on the mounting frame 31, and the output shaft of the motor 34 is fixedly connected to one end of one of the rotating shafts 32, and the other ends of the two rotating shafts 32 are fixedly connected to gears 35, and the two gears 35 are meshed with each other; when working, the output shaft of the motor 34 rotates to drive the corresponding rotating shaft 32 to rotate in one direction, and through the meshing action between the two gears 35, the two rotating shafts 32 rotate toward each other along the rotating connection, thereby driving the two conveying rollers 33 to rotate toward each other, and clamping and conveying the nylon film between the two conveying rollers 33.

[0047] As a further implementation scheme of the present invention, a first heating plate 36 is fixedly installed between the two shielding frames 2, and a second heating plate 37 is fixedly installed between the two support plates 3, and the heating ends of the first heating plate 36 and the second heating plate 37 are arranged opposite to each other; during operation, when the nylon film is moved and transported above the processing table 1, the upper and lower surfaces of the nylon film are heated respectively by the first heating plate 36 and the second heating plate 37, so as to evenly heat the nylon film during the movement and improve the lateral stretching effect of the nylon film.

[0048] A stretching method for a transverse stretching device for a nylon film, the method comprising the following steps:

[0049] Step 1: Use the film conveying mechanism to move the nylon film so that the nylon film moves between the two shielding frames 2;

[0050] Step 2: The cyclic conveying mechanism is used to make the clamping fixtures 4 on the two support plates 3 move unidirectionally along the moving direction of the nylon film and maintain the same moving speed as the nylon film;

[0051] Step 3: When the clamping tool 4 on the support plate 3 moves to one side of the nylon film, the corresponding side of the nylon film is clamped by the film clamping mechanism, and in the process of synchronous movement with the nylon film, the clamping position of the nylon film is laterally stretched by the moving stretching mechanism.

[0052] Working principle of the present invention:

[0053] The nylon film is moved and transported by the film conveying mechanism so that the nylon film moves between the two shielding frames 2, and then the clamping fixtures 4 on the two support plates 3 are moved unidirectionally and cyclically along the moving direction of the nylon film through the action of the circular conveying mechanism, and maintain the same moving speed as the nylon film. When the clamping fixtures 4 on the support plate 3 move to one side of the nylon film, the corresponding side of the nylon film is clamped by the action of the film clamping mechanism, and in the process of synchronous movement with the nylon film, the clamping position of the nylon film is stretched laterally by the action of the mobile stretching mechanism, and the clamping of the side of the nylon film is released after the stretching is completed, so that in the process of moving and conveying the nylon film, the side of the nylon film is continuously stretched laterally by the unidirectional circular movement of multiple clamping fixtures 4, thereby improving the stretching efficiency of the nylon film and the degree of automation of the transverse stretching, and reducing the demand for human resources.

[0054] The above shows and describes the basic principles, main features and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited to the above embodiments, and the above embodiments and descriptions only describe the principles of the present invention. The present invention may have various changes and improvements without departing from the spirit and scope of the present invention, and these changes and improvements fall within the scope of the present invention to be protected, and the scope of protection claimed by the present invention is defined by the attached claims and their equivalents.

Claims

1. A transverse stretching device for nylon film, comprising a processing table (1), characterized in that: Both sides of the top of the processing table (1) are fixedly connected to a shielding frame (2), a support plate (3) is provided inside the shielding frame (2), the support plate (3) is fixedly connected to the top of the processing table (1), a plurality of clamping fixtures (4) are provided above the support plate (3), a film clamping mechanism is connected to the clamping fixtures (4), and a circulating conveying mechanism is connected to the support plate (3); The shielding frame (2) is connected to a movable stretching mechanism, which drives the clamping tool (4) to move via a circulating conveying mechanism, and during the movement, the side of the nylon film is clamped and fixed via the film clamping mechanism, and then the movable stretching mechanism drives the clamping tool (4) to stretch the nylon film laterally, and both ends of the processing table (1) are connected to film conveying mechanisms; The movable stretching mechanism comprises two guide rails (8), the two guide rails (8) are respectively fixedly connected to the inside of the two shielding frames (2), the guide rails (8) comprise a limit section (801), an inclined section (802) and a return section (803), the film clamping mechanism comprises a movable groove (12), the movable groove (12) is provided on one side of the clamping fixture (4), a movable plate (13) is provided on the top surface of the movable groove (12), and two circular pins (14) are fixedly connected to the inside of the movable groove (12), the circular pins ( 14) are slidably inserted on the movable plate (13), the circular pins (14) are sleeved with a first spring (15), the first spring (15) is fixedly connected between the movable plate (13) and the bottom surface of the movable groove (12), one side of the movable plate (13) extends to the outside of the movable groove (12) and is fixedly connected to an upper clamping claw (16), one side of the clamping tool (4) is fixedly connected to a fixing strip (17), one side of the fixing strip (17) is fixedly connected to a lower clamping claw (18), and the other side of the clamping tool (4) is provided with a fixed A fixed frame (19), wherein two limit pins (20) are slidably inserted on the fixed frame (19), and the limit pins (20) are fixedly connected to the clamping fixture (4). A second spring (21) is sleeved on the limit pin (20), and the second spring (21) is fixedly connected between the fixed frame (19) and an end of the limit pin (20) away from the clamping fixture (4). A stop bar (22) is fixedly connected inside the fixed frame (19), and one end of the stop bar (22) passes through the clamping fixture (4) and extends to the movable groove (12). ) is located inside the bottom of the movable plate (13), one end of the blocking bar (22) located at the bottom of the movable plate (13) is provided with a guiding inclined surface, and a first circular plate (23) is provided on one side adjacent to the two shielding frames (2), and the first circular plate (23) is located on one side of the intersection of the limiting section (801) and the inclined section (802), and when the clamping tool (4) moves from the limiting section (801) to the inclined section (802), the bottom of the first circular plate (23) and the corresponding top of the movable plate (13) are in contact and pressed; The top of the fixed frame (19) is fixedly connected to a connecting strip (24), the top of the connecting strip (24) is fixedly connected to a circular column (25), the top surface of the shielding frame (2) is fixedly connected to a fixing rod (26), the fixing rod (26) is fixedly connected to a second circular plate (27), the second circular plate (27) is located above the intersection of the inclined section (802) and the return section (803), when the clamping tool (4) moves from the inclined section (802) to the return section (803), the circular column (25) on the connecting strip (24) and the second circular plate (27) are in contact and squeezed; The top of the shielding frame (2) is fixedly connected to a limit housing (28), the interior of the limit housing (28) is slidably connected to a mounting plate (29), one end of the mounting plate (29) is fixedly connected to the corresponding first circular plate (23), and a hydraulic cylinder (30) is fixedly installed on the top of the limit housing (28), the piston shaft of the hydraulic cylinder (30) passes through the limit housing (28) and extends to the interior of the limit housing (28) and is then fixedly connected to the top of the corresponding mounting plate (29).

2. A transverse stretching device for nylon film according to claim 1, characterized in that: The circulating conveying mechanism comprises an annular slide rail (5), the annular slide rail (5) is fixedly connected to the top of the support plate (3), a plurality of slide seats (6) are slidably mounted on the annular slide rail (5), a slide bar (7) is fixedly connected to the top of the slide seat (6), and the clamping fixture (4) is slidably connected to the corresponding slide bar (7).

3. A transverse stretching device for nylon film according to claim 2, characterized in that: The tilting section (802) and the return section (803) are close to the adjacent side of the two annular slide rails (5), and one side of the clamping tool (4) is fixedly connected to a mounting bar (9), and the top of the mounting bar (9) is fixedly connected to two mounting shafts (10), and the mounting shafts (10) are rotatably connected to limit rollers (11), and the two adjacent limit rollers (11) are located on both sides of the corresponding guide rail (8).

4. A transverse stretching device for nylon film according to claim 1, characterized in that: The film conveying mechanism comprises two mounting frames (31), the two mounting frames (31) being fixedly connected to two ends of the processing table (1) respectively, the interior of each mounting frame (31) being rotatably connected to two rotating shafts (32), each rotating shaft (32) being fixedly connected to a conveying roller (33), and each mounting frame (31) being connected to a mechanism for rotating in opposite directions.

5. A transverse stretching device for nylon film according to claim 4, characterized in that: The oppositely rotating mechanism comprises a motor (34), the motor (34) being fixedly mounted on the mounting frame (31), the output shaft of the motor (34) being fixedly connected to one end of one of the rotating shafts (32), the other ends of the two rotating shafts (32) being fixedly connected to gears (35), the two gears (35) being meshed with each other.

6. The transverse stretching device for nylon film according to claim 1, characterized in that: A first heating plate (36) is fixedly mounted between the two shielding frames (2), and a second heating plate (37) is fixedly mounted between the two support plates (3), wherein the heating ends of the first heating plate (36) and the second heating plate (37) are arranged opposite to each other.

7. A stretching method for a transverse stretching device for a nylon film, applicable to a transverse stretching device for a nylon film according to any one of claims 1 to 6, characterized in that: The method comprises the following steps: Step 1: Using a film conveying mechanism to move and convey the nylon film, so that the nylon film moves between the two shielding frames (2); Step 2: The cyclic conveying mechanism is used to cause the clamping fixtures (4) on the two support plates (3) to perform unidirectional cyclic movement along the moving direction of the nylon film, and to maintain the same moving speed as the nylon film; Step 3: When the clamping tool (4) on the support plate (3) moves to one side of the nylon film, the film clamping mechanism clamps the corresponding side of the nylon film, and in the process of synchronous movement with the nylon film, the moving stretching mechanism stretches the clamping position of the nylon film laterally.

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