Biaxial stretching device for nylon film production

Abstract

The utility model discloses a two-way stretching device for nylon film production, which comprises a machine table and a transverse pneumatic stretching roller arranged at one end of the machine table and used for transversely stretching a nylon film, and a film conveying roller is arranged on one side of the upper end face of the machine table. The air cooler works to suck air and output the air into the pre-filter for impurity filtration, impurities are prevented from being attached to the surface of the nylon film, the filtered air enters the air outlet hose through the air outlet pipe fitting with double outlets, and meanwhile the air enters the air outlet plate piece through the air outlet hose and is blown out upwards and obliquely outwards. And the air outlet plate vertically and longitudinally moves along with the longitudinal stretching roller, so that the phenomenon that thermal shrinkage is shortened in the stretching process is avoided through the cooling and shaping effect in longitudinal stretching of the nylon film, the stretching size difference of thermal shrinkage of the nylon film can be reduced, and the quality of the nylon film after stretching is further improved.

Description

Technical Field

[0001] The utility model belongs to the technical field of film stretching, and in particular relates to a bidirectional stretching device for producing nylon films. Background Art

[0002] Polyimide film is one of the earliest commercial products of polyimide, which is used for slot insulation of motors and cable wrapping materials. During the production process of polyimide film, the film needs to be stretched, so a stretching machine used in this field is particularly necessary. The existing polyimide film biaxial stretching machine is more troublesome when tensioning the film, and the existing polyimide film biaxial stretching machine is more troublesome when cutting the film, and the film cannot be fixed during the cutting process, which is prone to uneven cutting.

[0003] For this purpose, a polyimide film biaxial stretching machine with a bulletin number of "CN209999679U" belongs to the technical field of polyimide film production, and includes a workbench, a plurality of support plates are arranged on the top of the workbench, and the inner sides of the plurality of support plates are all rotatably connected with transmission rollers, a first motor is installed at one end of the support plate, and the output end of the first motor is rotatably connected with the transmission roller. The utility model is provided with a hydraulic cylinder, a transmission plate and a cutter. When it is necessary to cut the film, the hydraulic cylinder drives the cutter to move downward through the transmission plate, and the cutter contacts the film and completes the cutting, which is more convenient. A fixed block is arranged on one side of the cutter, and a spring rod is arranged at the bottom of the fixed block. During the downward movement of the cutter, the spring rod first contacts the film, and the cutter continues to move downward, the spring rod contracts, and the film is pressed and fixed on the workbench by the spring rod, and then the cutting is completed by the cutter, and the phenomenon of uneven cutting is not easy to occur.

[0004] However, for the above-mentioned polyimide film biaxial stretching machine, although it is relatively convenient to set up a cylinder, a support seat and a tensioning roller, the polyimide film is located on the top of the tensioning roller, and the cylinder is extended or contracted to drive the support seat and the tensioning roller to move upward or downward, thereby applying different degrees of tensioning force to the film, there are still the following obvious defects during use: since there is no structure for cooling and shaping the film by wind during the stretching process between the stretching mechanisms in the above-mentioned stretching equipment, it is easy for the film to be not cooled during stretching and to produce thermal shrinkage at the film after output, thereby causing the size of the stretched film to return to the unstretched state after thermal shrinkage. Utility Model Content

[0005] The utility model aims to provide a biaxial stretching device for producing nylon film to solve the problems raised in the above background technology.

[0006] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: a biaxial stretching device for nylon film production, comprising a machine platform, and a transverse pneumatic stretching roller with a ceramic surface arranged at one end of the machine platform for transversely stretching the nylon film, two film conveying rollers with ceramic surfaces for conveying the nylon film after transverse stretching are arranged on one side of the upper end surface of the machine platform, and a longitudinal stretching roller with a Teflon surface for vertically and longitudinally stretching the nylon film is pneumatically penetrated in the output direction of the film conveying roller, and air outlet plates for cold air shaping the nylon film during the stretching process are arranged on both sides of the bracket of the longitudinal stretching roller, and a longitudinal stretching cylinder that penetrates the machine platform and drives the longitudinal stretching roller for stretching is arranged on the crossbeam between the legs arranged at the bottom of the machine platform, and a cold air blower for penetrating and connecting the air outlet plates to provide gas is arranged on one side of the longitudinal stretching cylinder and located on the lower end surface of the machine platform.

[0007] Preferably, transverse stretching cylinders are installed in the cavities provided on both sides of one end of the machine, and one end of the transverse stretching cylinder piston rod is fixed to the front and rear ends of one side of the transverse pneumatic stretching roller bracket to achieve the transverse stretching and tensioning of the nylon film to avoid thermal shrinkage.

[0008] Preferably, fixed blocks are provided at both ends of one side of the transverse pneumatic stretching roller, and a guide input roller for guiding the input and stretching the input nylon film is rotatably provided between the fixed blocks, which is used to guide the nylon film into the transverse pneumatic stretching roller for tensioning and conveying.

[0009] Preferably, the output end of the air cooler is connected to a pre-filter via a pipeline, and the output end of the pre-filter is connected to an air outlet pipe with two air outlet ports, so as to cool the stretched nylon film by blowing air to avoid severe thermal shrinkage.

[0010] Preferably, the air outlet plates on both sides between the longitudinal stretching rollers are installed at an angle, and an air outlet hose is connected to the bottom of the air outlet plate. The air outlet hose movably passes through the lower end surface of the machine and is connected to an air outlet pipe with two air outlets, so that external gas can be transported to the air outlet plate through the air outlet hose.

[0011] Preferably, a through slot is provided on the machine platform, and the piston rod of the longitudinal stretching cylinder passes through the through slot and is fixed to the bottom of the bracket of the longitudinal stretching roller, and an output roller is provided on one side of the longitudinal stretching roller and at one end of the surface of the machine platform, and the longitudinal stretching roller can be pneumatically stretched vertically to stretch the nylon film.

[0012] Compared with the prior art, the technical effects and advantages of the utility model are as follows: the biaxial stretching device for nylon film production, through the air outlet plates arranged on both sides of the bracket of the longitudinal stretching roller, the air outlet hose arranged at the bottom of the air outlet plate, the pre-filter connected to the other end of the air outlet hose, and the air cooler connected to the filter, enables the longitudinal stretching roller to drive the nylon film vertically and longitudinally upward to stretch the nylon film, and the air cooler works to draw gas into and output it to the pre-filter for impurity filtering to avoid impurities adhering to the surface of the nylon film, and the filtered gas enters the air outlet hose through the air outlet pipe with double outlets, and at the same time, the gas enters the air outlet plate through the air outlet hose and is blown upward and obliquely outward, and the air outlet plate moves vertically and longitudinally with the longitudinal stretching roller, so it plays a role of cooling and shaping in the longitudinal stretching of the nylon film, avoiding the phenomenon of thermal shrinkage and shortening during the stretching process, thereby reducing the stretching size difference of the nylon film due to thermal shrinkage, and further improving the quality of the nylon film after stretching.

[0013] By setting the surfaces of the transverse pneumatic stretching roller and the film conveying roller as ceramic surfaces and the longitudinal stretching roller as Teflon surfaces, the high-temperature adhesion of the nylon film during stretching by the transverse pneumatic stretching roller and the longitudinal stretching roller can be effectively avoided, and the edges of the nylon film can maintain stability and uniformity during stretching, thereby improving the stretching strength and impact resistance of the nylon film by reasonably setting the stretching speed and stretching gap during stretching, thereby further enhancing the quality of the stretched nylon film. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 It is a schematic diagram of the structure of the utility model;

[0015] Figure 2 This is a schematic diagram of the top view of the transverse pneumatic stretching roller of the utility model;

[0016] Figure 3 It is a schematic diagram of the top view structure of the air outlet plate of the utility model.

[0017] In the figure: 1. Machine; 2. Horizontal pneumatic stretching roller; 3. Film conveying roller; 4. Longitudinal stretching roller; 5. Air outlet plate; 6. Longitudinal stretching cylinder; 7. Air cooler; 8. Horizontal stretching cylinder; 9. Guide input roller; 10. Pre-filter; 11. Air outlet pipe; 12. Air outlet hose; 13. Through slot; 14. Output roller. DETAILED DESCRIPTION

[0018] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0019] See also Figure 1-3 The utility model provides a technical solution: a biaxial stretching device for nylon film production, comprising a machine table 1, and a transverse pneumatic stretching roller 2 with a ceramic surface for transversely stretching the nylon film at one end of the machine table 1, the transverse pneumatic stretching roller 2 is installed with a support seat through the rotating shafts at both ends, and the support seat is arranged on the left side of the machine table 1 and fixed on the piston rod of the transverse stretching cylinder 8 to input and transversely stretch the nylon film, and two film conveying rollers 3 with ceramic surfaces are arranged on one side of the upper end surface of the machine table 1 for conveying the nylon film after transverse stretching, and the film conveying rollers 3 are installed on the machine table 1 at the film output end of the transverse pneumatic stretching roller 2 through a planned fixed bracket, and are installed from left to right in sequence for conveying the film, and the output end direction of the film conveying roller 3 is pneumatically penetrated with a longitudinal stretching roller 4 with a Teflon surface for vertically and longitudinally stretching the nylon film, and the side end surface of the longitudinal stretching roller 4 is provided with a coating, which is beneficial to the stretching and conveying of the nylon film, and the longitudinal Two stretching rollers 4 are vertically rotated by a bracket, and the nylon film passes through the fitting surfaces of the two longitudinal stretching rollers 4. Air outlet plates 5 for cold air shaping during the stretching process of the nylon film are provided on both sides of the bracket of the longitudinal stretching roller 4. The air outlet plates 5 are obliquely arranged on both sides of the longitudinal stretching roller 4, and the surface of the air outlet plates 5 is provided with cooling air outlet holes for blowing upward and obliquely blowing to one side, which helps to follow the cooling and shaping of the nylon film during stretching to avoid the occurrence of thermal shrinkage. A longitudinal stretching cylinder 6 that passes through the machine 1 and is used to stretch and drive the longitudinal stretching rollers 4 is provided on the crossbeam between the legs at the bottom of the machine 1, so as to realize the vertical upward movement of the longitudinal stretching rollers 4 to longitudinally stretch the nylon film. A cold air fan 7 for providing gas to the air outlet plates 5 is provided on one side of the longitudinal stretching cylinder 6 and located on the lower end surface of the machine 1, so as to suck in external wind and filter and transport it into the air outlet plates 5 to cool and shape the nylon film during stretching.

[0020] The cavities provided on both sides of one end of the machine 1 are equipped with transverse stretching cylinders 8, which can push the support seat of the transverse pneumatic stretching roller 2 to move in the direction away from one end of the machine 1 to perform transverse stretching of the nylon film. One end of the piston rod of the transverse stretching cylinder 8 is fixed to the front and rear ends of one side of the bracket of the transverse pneumatic stretching roller 2. Fixed blocks are provided at both ends of one side of the transverse pneumatic stretching roller 2, and a guide input roller 9 for guiding the input and stretching of the input nylon film is rotatably provided between the fixed blocks. The guide input roller 9 is used to guide the input of the nylon film to be stretched to avoid friction and scratches between the transverse stretching support seat. The output end of the cold air fan 7 is connected to a pre-filter 10 through a pipeline, which can filter impurities in the input gas and reduce the phenomenon that impurities are adhered to the surface of the nylon film and stains cannot be removed. The output end of the pre-filter 10 is connected to an outlet pipe 11 with two outlet ports, and the treated gas is output to the outlet hose 12 through the outlet pipe 11.

[0021] The air outlet panels 5 on both sides between the longitudinal stretching rollers 4 are installed obliquely, and an air outlet hose 12 is connected to the bottom of the air outlet panel 5, so that the air outlet hose 12 can be extended and moved along with the air outlet panel 5 when the air outlet panel 5 moves. The air outlet hose 12 movably penetrates to the lower end surface of the machine 1 and is connected to the air outlet pipe 11 with two air outlets, so as to realize the effect of two-way air outlet to quickly cool down and shape the nylon film. A through groove 13 is penetrated on the machine 1, and the longitudinal stretching cylinder 6 passes through the machine 1 to make the longitudinal stretching roller 4 move vertically longitudinally to stretch the nylon film. The piston rod of the longitudinal stretching cylinder 6 passes through the through groove 13 and is fixed at the bottom of the bracket of the longitudinal stretching roller 4, and an output roller 14 is provided on one side of the longitudinal stretching roller 4 and at one end of the surface of the machine 1, and the output of the nylon film after stretching and shaping is wound up by an external winding roller.

[0022] Specifically, when in use, turn on the power supply, let the nylon film be wound through the transverse pneumatic stretching roller 2, the film conveying roller 3, the longitudinal stretching roller 4 and the output roller 14 and be wound and connected with the external winding roller, and use the external motor to make the winding roller drive the nylon film to move, and the external controller controls the transverse stretching cylinder 8 to push the transverse pneumatic stretching roller 2 away from the left end of the machine 1. The remote movement of the transverse pneumatic stretching roller 2 can generate a certain pulling force, and the generated pulling force stretches the nylon film in transit transversely. The transversely stretched nylon film is conveyed by the film conveying roller 3 with a ceramic surface, which can reduce the phenomenon of high-temperature nylon film sticking to the surface of the film conveying roller 3. When the nylon film passing through the film conveying roller 3 is conveyed on the longitudinal stretching roller 4, the external controller controls the longitudinal stretching cylinder 6 to push The dynamic longitudinal stretching roller 4 moves vertically upward in the longitudinal direction, and makes the nylon film move with the longitudinal stretching. During the longitudinal stretching, the air cooler 7 is started by an external controller. The air cooler 7 draws gas into and outputs it to the pre-filter 10 for impurity filtration to prevent impurities from adhering to the surface of the nylon film, and the filtered gas enters the air outlet hose 12 through the air outlet pipe 11 with double outlets. At the same time, the gas enters the air outlet plate 5 through the air outlet hose 12 and blows upward and obliquely outward. The air outlet plate 5 moves vertically and longitudinally with the longitudinal stretching roller 4, so it plays a role of cooling and shaping in the longitudinal stretching of the nylon film, avoiding the phenomenon of thermal shrinkage and shortening during the stretching process, thereby reducing the stretching size difference of the nylon film due to thermal shrinkage, and further improving the quality of the nylon film after stretching.

[0023] Finally, it should be noted that the above is only a preferred embodiment of the present invention and is not intended to limit the present invention. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art can still modify the technical solutions described in the aforementioned embodiments or make equivalent substitutions for some of the technical features therein. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A biaxial stretching device for producing nylon film, comprising a machine platform (1), and a transverse pneumatic stretching roller (2) with a ceramic surface disposed at one end of the machine platform (1) for transversely stretching the nylon film, characterized in that: Two film conveying rollers (3) with ceramic surfaces for conveying the nylon film after transverse stretching are provided on one side of the upper end face of the machine (1); a longitudinal stretching roller (4) with a Teflon surface for vertically stretching the nylon film is pneumatically penetrated in the output direction of the film conveying roller (3); air outlet plates (5) for cold air shaping the nylon film during the stretching process are provided on both sides of the bracket of the longitudinal stretching roller (4); a longitudinal stretching cylinder (6) penetrating the machine (1) and driving the longitudinal stretching roller (4) for stretching is provided on the crossbeam between the legs provided at the bottom of the machine (1); a cold air blower (7) for penetrating and connecting the air outlet plates (5) and providing gas is provided on one side of the longitudinal stretching cylinder (6) and located on the lower end face of the machine (1).

2. A biaxial stretching device for nylon film production according to claim 1, characterized in that: A transverse stretching cylinder (8) is installed in the cavities provided on both sides of one end of the machine platform (1), and one end of the piston rod of the transverse stretching cylinder (8) is fixed to the front and rear ends of one side of the transverse pneumatic stretching roller (2) bracket.

3. The biaxial stretching device for producing nylon film according to claim 1, characterized in that: Fixed blocks are provided at both ends of one side of the transverse pneumatic stretching roller (2), and a guide input roller (9) for guiding the input and stretching the input nylon film is rotatably provided between the fixed blocks.

4. The biaxial stretching device for producing nylon film according to claim 1, characterized in that: The output end of the air cooler (7) is connected to a pre-filter (10) via a pipeline, and the output end of the pre-filter (10) is connected to an air outlet pipe (11) having two air outlet ports.

5. A biaxial stretching device for nylon film production according to claim 4, characterized in that: The air outlet plates (5) on both sides between the longitudinal stretching rollers (4) are installed in an inclined manner, and an air outlet hose (12) is connected to the bottom of the air outlet plate (5). The air outlet hose (12) movably penetrates the lower end surface of the machine (1) and is connected to an air outlet pipe (11) with two air outlets.

6. The biaxial stretching device for producing nylon film according to claim 1, characterized in that: The machine platform (1) is provided with a through slot (13), the piston rod of the longitudinal stretching cylinder (6) passes through the through slot (13) and is fixed to the bottom of the bracket of the longitudinal stretching roller (4), and an output roller (14) is provided on one side of the longitudinal stretching roller (4) and at one end of the surface of the machine platform (1).

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