Transverse film stretcher

Abstract

The utility model discloses a film transverse stretching machine which comprises a transverse stretching box body, a film inlet is formed in one end of the transverse stretching box body, and a film outlet is formed in the other end of the transverse stretching box body. Negative pressure air curtain devices are arranged at a film inlet and a film outlet of the transverse pulling box body, each negative pressure air curtain device comprises a first air draft part and a second air draft part which are oppositely arranged, the first air draft part and the second air draft part are located on the two sides of a film respectively, and a channel space allowing the film to penetrate through is formed between the first air draft part and the second air draft part; the width of the channel space is matched with the width of the thin film, and the thin film inlet and the thin film outlet are in a slit shape matched with the thin film. According to the scheme, the negative pressure air curtain device is adopted at the film inlet, the two air draft parts which are oppositely arranged are used for air draft at the same time, the negative pressure air curtain is formed in the channel space between the two air draft parts, gas close to the film inlet can be sucked away, and therefore the problem that solvent gas escapes is effectively avoided under the condition that film conveying is not affected.

Description

TECHNICAL FIELD

[0001] The utility model belongs to the technical field of film production and processing equipment, and particularly relates to a film transverse stretching machine. BACKGROUND

[0002] The existing film transverse stretching machine (referred to as a transverse stretching machine) such as the Chinese invention patent with the application publication number CN117754883A is used for the transverse stretching of a film in the transverse stretching machine, and the imidization reaction is carried out at a high temperature. The transverse stretching machine mainly comprises a transverse stretching box body, a conveying system and a heating system. One end of the transverse stretching box body is an inlet end, and the other end is an outlet end. For the process of producing a polyimide film by using a chemical method, the film material solvent is evaporated in the transverse stretching machine and the system upstream of the transverse stretching machine. The gas evaporated has flammability, and therefore, it is necessary to pay attention to the fact that the concentration thereof cannot be too high and cannot be leaked. In particular, the concentration of the solvent gas in the upstream system is relatively high on the inlet side of the transverse stretching machine, that is, the connecting side of the upstream system. Therefore, it is necessary to ensure that the solvent does not escape into the high-temperature environment of the transverse stretching box body. The existing equipment needs to be further improved in the isolation of the gas and the ambient temperature in different process areas in order to further ensure the process quality and safety. SUMMARY

[0003] The utility model solves the technical problems that the existing equipment has poor effect in the isolation of the gas and the ambient temperature, and there is a risk of gas escaping. The utility model provides a film transverse stretching machine, which realizes better isolation effect by using a novel air curtain structure, and improves the safety and the accuracy of process control.

[0004] According to the technical scheme of the utility model, the utility model provides a film transverse stretching machine, which comprises a transverse stretching box body. A film inlet is arranged at one end of the transverse stretching box body, and a film outlet is arranged at the other end of the transverse stretching box body. A negative pressure air curtain device is arranged at the film inlet and the film outlet of the transverse stretching box body. The negative pressure air curtain device comprises oppositely arranged first and second air extraction parts. The first and second air extraction parts are respectively located on the two sides of the film. A channel space for the film to pass through is formed between the first and second air extraction parts. The width of the channel space is adapted to the width of the film. The film inlet and the film outlet are in the form of a slit adapted to the film.

[0005] Further, air curtain flow uniformizing plates are arranged on the first and second air extraction parts. The air curtain flow uniformizing plates are arranged in parallel or inclined along the film conveying direction. The air curtain flow uniformizing plates are provided with air holes or slit holes.

[0006] Further, the air curtain flow uniformizing plates are single-layer structures, or the air curtain flow uniformizing plates are arranged in multiple layers, and the air holes or slit holes of each layer are oppositely arranged or staggered.

[0007] Further, the partition portion at the channel space entrance and / or exit is adapted to the thickness of the film, and the partition portion at the channel space entrance forms a film entrance of the transverse stretching box.

[0008] Further, the partition portion comprises a slit baffle on the first suction portion and / or the second suction portion.

[0009] Further, the partition portion further comprises channel side plates arranged on both sides of the first suction portion and the second suction portion, and the channel side plates and the first suction portion and the second suction portion jointly form side walls of the channel space.

[0010] Further, the film transverse stretching machine is provided with an amplitude modulation device, the amplitude modulation device comprises two transversely independently arranged guide rail fixing seats, the guide rail fixing seats are located in the transverse stretching box, the transverse stretching box further has a transverse stretching frame, each guide rail fixing seat is slidingly arranged on the transverse stretching frame, each guide rail fixing seat is connected with an amplitude modulation mechanism, and each amplitude modulation mechanism independently drives the guide rail fixing seat to move or synchronously drives the guide rail fixing seat to move through a synchronous mechanism.

[0011] Further, the amplitude modulation mechanism comprises an amplitude modulation screw connected with the guide rail fixing seat and an amplitude modulation nut connected with the amplitude modulation screw, the amplitude modulation nut is connected with a driving control device; the transverse stretching frame comprises a transversely arranged amplitude modulation rail frame, the amplitude modulation rail frame is a hollow support structure, and the synchronous mechanism of the amplitude modulation mechanism and / or the amplitude modulation nut and / or the amplitude modulation screw are arranged in the inside of the amplitude modulation rail frame.

[0012] Further, the outer wall of the transverse stretching box is a heat preservation layer structure, the heat preservation layer structure comprises an inner side wall plate, an outer side wall plate and a hollow cavity between the inner side wall plate and the outer side wall plate; the amplitude modulation nut and / or the driving control device are located in the hollow cavity of the heat preservation layer structure or arranged outside the transverse stretching box.

[0013] Further, the transverse stretching frame is provided with two sections of amplitude modulation rails, the two sections of amplitude modulation rails have a spacing distance therebetween, and the two guide rail fixing seats are slidingly connected with the two sections of amplitude modulation rails respectively.

[0014] Compared with the prior art, the beneficial technical effects of the present application are as follows:

[0015] The negative pressure air curtain device is arranged at the film inlet of the film transverse stretching machine, two air suction parts are arranged oppositely and simultaneously perform air suction, a negative pressure air curtain is formed in the channel space between the two air suction parts, and the gas close to the film inlet is sucked away, so that the problem of solvent gas escaping is effectively avoided without affecting the film conveying. In addition, the amplitude modulation device is improved, the two amplitude modulation mechanisms are arranged separately, the two guide rail fixing bases have a large space for left and right movement to adapt to the deformation amount of thermal expansion, so that the structure is not deformed and damaged due to thermal expansion; meanwhile, the two amplitude modulation mechanisms can be synchronously controlled, the two guide rail fixing bases are symmetrically close to or far away from each other, operation is facilitated; and the synchronous mechanism is arranged in the hollow pipe body of the amplitude modulation rail frame of the transverse stretching machine frame, the amplitude modulation nut of the screw rod mechanism and the like are arranged outside the internal space of the box body, a certain temperature can be blocked, stable operation of the structure is ensured, and the service life is prolonged. BRIEF DESCRIPTION OF DRAWINGS

[0016] Figure 1 is a sectional view of the partial structure of the transverse stretching machine.

[0017] Figure 2 is Figure 1 is a schematic view of the three-dimensional structure of the transverse stretching machine.

[0018] Figure 3 is a schematic view of the three-dimensional structure of the negative pressure air curtain device.

[0019] Figure 4 is Figure 3 is a schematic view of the rear view of the negative pressure air curtain device.

[0020] Figure 5 is Figure 3 is a schematic view of the left view of the negative pressure air curtain device.

[0021] Figure 6 is a schematic view of the structure of the preferred negative pressure air curtain device.

[0022] Figure 7 is a schematic view of the three-dimensional structure of the amplitude modulation device.

[0023] Figure 8 is Figure 7 is a sectional view of the right side part of the amplitude modulation device.

[0024] Figure 9 is Figure 7 is a sectional view of the left side part of the amplitude modulation device.

[0025] Figure 10 is Figure 7The right part of the shown amplitude modulation device is a top view structural schematic diagram.

[0026] Explanation of reference signs in the drawings:

[0027] 100, transverse pulling box; 101, film inlet; 200, negative pressure air curtain device; 201, first air extraction part; 202, second air extraction part; 203, air curtain flow uniformizing plate; 204, passage space; 205, passage side plate; 206, slit baffle; 207, first airtight air bellow; 208, second airtight air bellow; 209, first air extraction pipe; 210, second air extraction pipe; 211, wind speed collecting device; 212, wind speed adjusting mechanism; 300, amplitude modulation device; 301, guide rail fixing seat; 302, transverse pulling frame; 303, amplitude modulation track; 304, amplitude modulation track frame; 305, inner side wall plate; 306, amplitude modulation synchronous shaft; 307, amplitude modulation screw rod; 308, amplitude modulation nut; 309, positioning partition piece; 310, amplitude modulation driving sprocket; 311, amplitude modulation driven sprocket; 312, amplitude modulation transmission chain; 313, amplitude modulation driving motor; 314, amplitude modulation hand wheel; 315, position display device; 316, automatic control device; 317, gearbox; 318, outer side wall plate; 319, wear-resistant sleeve; 320, partition sleeve. DETAILED DESCRIPTION

[0028] The utility model provides a film transverse stretching machine, solve existing equipment in gas and environmental temperature isolation aspect effect is not good, there is gas escape risk's problem, realize through novel air curtain structure provides better isolation effect, improve security and the accuracy of process control.

[0029] Please refer to Figures 1 to 3 The film transverse stretching machine includes a transverse pulling box 100, a film inlet 101 is arranged at one end of the transverse pulling box 100, and a film outlet is arranged at the other end of the transverse pulling box 100. A negative pressure air curtain device 200 is arranged at the film inlet 101 and the film outlet of the transverse pulling box 100, and the negative pressure air curtain device 200 is preferably located inside the transverse pulling box 100. Optionally, a negative pressure air curtain device 200 is also arranged in the middle of the transverse pulling box 100 to divide different temperature zones.

[0030] The negative pressure air curtain device 200 comprises a first air suction part 201 and a second air suction part 202 arranged oppositely, the first air suction part 201 and the second air suction part 202 are respectively located on two sides of the film, and a channel space 204 for the film to pass through is formed between the first air suction part 201 and the second air suction part 202. The width of the channel space 204 is adapted to the width of the film, the film inlet 101 and the film outlet are in the form of a slit adapted to the film, and the slit width of the film inlet 101 is smaller than the width of the channel space 204. The width of the slit corresponds to the size in the thickness direction of the film, for example, both are the size in the upward and downward direction. The size of the channel space 204, the film inlet 101 and the film outlet is adapted to the film, for example, including covering the width of the film, generally greater than or equal to the width, which can better ensure the isolation effect of the negative pressure air curtain device on both sides.

[0031] The relative of the first air suction part 201 and the second air suction part 202 refers to, for example, the relative of the air suction port, in other words, both have through holes (which can be called air holes) for air to pass through on the inward side. The air holes are directly provided on the air suction part (such as an air bellow), or the air curtain flow uniform plate 203 has air holes; in order to ensure the negative pressure air curtain effect, it is preferred that at least one side of the air suction part is provided with the air curtain flow uniform plate 203, and more preferably, the air curtain flow uniform plate 203 is provided on both the first air suction part 201 and the second air suction part 202.

[0032] In the working process of the device, the first air suction part 201 and the second air suction part 202 are used to suck air at the same time; the air curtain flow uniform plate 203 can make the air speed uniform, if there is no flow uniform plate, the problem that the closer to the air suction part (such as an air suction pipe), the greater the air speed, and the farther away from the air suction part (such as an air suction pipe), the less the air suction will occur; the channel space 204 is used for the film to pass through from the middle, and the film will not be subjected to strong air flow impact when passing through, and the air flow in the two spaces separated by the negative pressure air curtain device will be sucked away by the first air suction part 201 and the second air suction part 202 when reaching the vicinity of the negative pressure air curtain device, so that the air flow in the former space cannot enter the latter space, and vice versa. In this way, the environments of the adjacent spaces are relatively independent, and the ventilation effect of the space in the device is also ensured.

[0033] Please refer to Figures 3 to 6 In some embodiments, the air curtain flow uniform plate 203 is a single-layer structure; or in other embodiments, the air curtain flow uniform plate 203 is a multi-layer structure, and the air holes of each layer are arranged oppositely or staggered. According to some embodiments, the air curtain flow uniform plate 203 is arranged in parallel or inclined along the film conveying direction. Preferably,

[0034] The air curtain flow uniform plate 203 inside the first air suction part 201 and / or the second air suction part 202 is a multi-layer structure, which can make the flow uniform effect better. The multi-layer air curtain flow uniform plate 203 is arranged in parallel or inclined along the film conveying direction; for exampleFigure 6 In the shown embodiment, the air curtain flow uniformizer 203 is in two layers arranged parallel to the film conveying direction (transversely arranged); in other embodiments, the air curtain flow uniformizer 203 is not parallel to the film conveying direction but is arranged at an angle, i.e. is arranged obliquely. The air curtain flow uniformizer 203 has a plurality of air holes or a plurality of slit holes, and the air holes or slit holes of each layer are arranged oppositely or staggeredly. Opposite arrangement means that, in the air velocity direction, the air holes correspond to each other, and the connecting line of the corresponding air holes is consistent with the air velocity direction; staggered arrangement means that, in the air velocity direction, the air holes are staggered. In some embodiments, the air holes are, for example, small holes closely arranged on the air curtain flow uniformizer 203; in other embodiments, the air holes are strip-shaped holes arranged in an array, or the air curtain flow uniformizer 203 is in a grid or mesh shape; or a combination of multiple hole types; the slit hole is an elongated slit-shaped hole, and the slit hole is, for example, one or more, and the length direction of the slit hole is, for example, parallel to the film width direction or inclined at an angle.

[0035] Preferably, the entrance and / or exit of the channel space 204 has a partition portion matching the thickness of the film, and the partition portion is used to further narrow the entrance / exit, for example, the thickness of the film (and the steel belt) is about 1.2mm-1.5mm, and the partition portion narrows the entrance / exit to close to this thickness value, so as to better partition the space before and after the negative pressure air curtain device, and avoid that the entrance / exit is too large and gas can still escape. The partition portion at the entrance of the channel space 204 forms the film entrance 101 of the transverse tension box body 100; optionally, the film exit also adopts this structure. More specifically, for example, the partition portion includes at least one slit baffle 206 located on the first air suction part 201 and / or the second air suction part 202, and the slit baffle 206 is a sealingly connected and fixed upper and lower baffle on the outside; the slit baffle 206 forms a slit at the entrance and / or exit of the channel space 204, and the size of the slit is smaller than that of the channel space 204. The distance between the first air suction part 201 and the second air suction part 202 cannot be too close, so that the size of the entrance and / or exit of the channel space 204 can be further limited by the slit baffle 206, and the position and size of the slit are preferably adjustable (for example, the slit is formed by two detachable / adjustable-position baffles). More specifically, for example, the slit is located at the central position between the first air suction part 201 and the second air suction part 202, so that the distance between the film and the first air suction part 201 and the second air suction part 202 is substantially the same. It is conceivable that, in other feasible embodiments, the partition portion is a plate with a slit, or a pipe-shaped structure, or further provided with a flow guide / filter structure, etc., all of which are intended to play a partitioning role and do not deviate from the concept of the present scheme.

[0036] Optionally, the partition further comprises a passage side plate 205 arranged on both sides of the first air suction part 201 and the second air suction part 202, and the passage side plate 205, together with the air curtain flow uniform plate of the first air suction part 201 and the air curtain flow uniform plate of the second air suction part 202, forms four side walls of the passage space 204. In actual application, the position and size of the passage space 204 are not greater than the connecting port (such as the film inlet) of the front and rear spaces, and the connecting port is sealed to ensure that the airflow at the connecting port can only flow to the first air suction part 201 and the second air suction part 202, and cannot escape from other places around the connecting port. It can be understood that for the case that the horizontal pulling box space is small or the first air suction part 201 and the second air suction part 202 are large, the side wall of the horizontal pulling box space can be equivalent to the side wall of the passage space, which can effectively achieve the desired effect, and the passage side plate 205 (and other structures for limiting the connecting port) can not be arranged.

[0037] In some embodiments, the first air suction part 201 and the second air suction part 202 are in strip shape to adapt to the width of the space connecting port; the air curtain flow uniform plate 203 is a porous strip-shaped flat plate, and the air curtain flow uniform plates 203 of the first air suction part 201 and the second air suction part 202 are parallel. This scheme has a small volume and is convenient for production and use while achieving the desired function. In the horizontal pulling box, there are also heating components such as components for blowing hot air, and therefore the air curtain device should not be too large to ensure the uniformity and efficiency of the main heating effect, and in addition, if the air curtain device is too large, it will also affect the overall equipment box size, leading to increased cost, low heating efficiency, poor heat preservation effect, etc. The first air suction part 201 and the second air suction part 202 are arranged in correspondence, for example, to adapt to the horizontally conveyed film.

[0038] More specifically, the negative pressure air curtain device comprises a first air-tight bellows 207 and a second air-tight bellows 208; the first air-tight bellows 207 is connected with a first air suction pipe 209, and the first air-tight bellows 207 has a first air suction part 201 on the side facing the second air-tight bellows 208; the second air-tight bellows 208 is connected with a second air suction pipe 210, and the second air-tight bellows 208 has a second air suction part 202 on the side facing the first air-tight bellows 207. The air curtain flow uniform plate 203 matches the first air-tight bellows 207 and the second air-tight bellows 208 to ensure airflow uniformity. The passage side plate 205 and the slit baffle 206 (if any) are arranged on the first air-tight bellows 207 and the second air-tight bellows 208. Preferably, the first air suction pipe 209 is arranged on both sides of the first air-tight bellows 207, and the second air suction pipe is arranged on both sides of the second air-tight bellows 208; this two-side air suction pipe arrangement is more helpful to make the airflow of the air curtain flow uniform plate 203 uniform.

[0039] Please refer to Figure 6The wind speed collecting device 211 (such as an anemometer) is arranged at the air curtain flow uniformizing plate 203, and the wind speed adjusting mechanism 212 (such as a speed-adjusting fan or a wind adjusting valve independent of the fan) is connected to the outside of the first air suction part 201 and / or the second air suction part 202 through an air suction pipeline, so that the wind speed can be monitored and adjusted. Specifically, the first air suction part 201 and / or the second air suction part 202 are connected with an air suction pipeline, for example, including the first air suction pipeline 209 and the second air suction pipeline 210, and the wind speed adjusting mechanism 212 is arranged at the outer end of the air suction pipeline. Preferably, the wind speed collecting device 211 is also electrically connected with the wind speed adjusting mechanism 212, and can transmit signals, so as to realize automatic adjustment control according to the wind speed. More specifically, the ends of the first air suction pipeline 209 and the second air suction pipeline 210 converge into one pipeline and are connected with one wind speed adjusting mechanism 212, or the first air suction pipeline 209 and the second air suction pipeline 210 are respectively connected with respective wind speed adjusting mechanisms.

[0040] Please refer to Figures 7 to 10 The amplitude adjusting device 300 is further arranged in the film transverse stretching machine, and includes two guide rail fixing seats 301 which are transversely distributed and independently arranged. The guide rail fixing seat 301 is located in the transverse stretching box body 100, and the transverse stretching box body 100 further has a transverse stretching rack 302. Each guide rail fixing seat 301 is slidingly arranged on the transverse stretching rack 302 and can slide left and right. Each guide rail fixing seat 301 is connected with an amplitude adjusting mechanism; each amplitude adjusting mechanism independently drives the guide rail fixing seat 301 to move, or is connected through a synchronous mechanism to synchronously drive the two guide rail fixing seats 301 to move.

[0041] The amplitude adjusting mechanism is, for example, a mechanical structure mode such as a ball screw, a screw nut, etc., or an electrically controlled electric telescopic rod, a cylinder, a hydraulic cylinder, etc.; and the synchronous mechanism is, for example, a synchronous shaft transmission structure, a control system (cable, pipeline, electromagnetic valve), etc. The amplitude adjusting device is located in the transverse stretching box body 100 of the transverse stretching machine, and is at room temperature when the equipment is installed or overhauled, and is at a high temperature environment when working, which will cause thermal expansion deformation of the metal structure. In the prior art, the two guide rail fixing seats are directly connected through a rod, so that they only have a little deformable space, and the structure (such as a ball screw) at one end may be deformed due to thermal expansion, resulting in damage. In the present scheme, the amplitude adjusting mechanisms of the two guide rail fixing seats 301 are independently separated and not directly connected, thereby effectively avoiding the above problems.

[0042] In the preferred embodiment, the amplitude modulation mechanism comprises an amplitude modulation screw rod 307 connected with the guide rail fixing seat 301 and an amplitude modulation nut 308 connected with the amplitude modulation screw rod 307, and the amplitude modulation screw rod 307 and the amplitude modulation nut 308 form a screw rod nut transmission mechanism (referred to as a screw rod mechanism). The amplitude modulation nut 308 is connected with a driving control device, for example, the amplitude modulation nut 308 is connected with a motor through a chain transmission, so as to convert the rotation output by the motor into the extension and retraction distance of the amplitude modulation screw rod 307, thereby adjusting and controlling the position of the guide rail fixing seat 301.

[0043] Further, the cross-pulling frame 302 comprises a transversely arranged amplitude modulation rail frame 304, the amplitude modulation rail frame 304 is a hollow support structure, and the synchronization mechanism of the amplitude modulation mechanism and / or the amplitude modulation nut 308 and / or the amplitude modulation screw rod 307 are arranged in the hollow part inside the amplitude modulation rail frame 304, so that the mechanical transmission parts are isolated from the high-temperature working environment. For example, in the preferred embodiment, the amplitude modulation screw rod 307 and the synchronization mechanism of the amplitude modulation mechanism are arranged in parallel along the upper and lower directions of the transverse direction (both are transversely arranged and arranged in parallel one above the other), and the synchronization mechanism is arranged inside the amplitude modulation rail frame 304.

[0044] Both guide rail fixing seats 301 (and guide rails on the guide rail fixing seat 301, amplitude modulation rail frame 304, etc.) are located in the cross-pulling box body 100, and the outer wall of the cross-pulling box body 100 is a heat preservation layer structure, which comprises an inner side wall plate 305, an outer side wall plate 318, and a hollow cavity between the inner side wall plate 305 and the outer side wall plate 318. The inner side of the inner side wall plate 305 and / or the outer side wall plate 318 is, for example, a steel plate attached with a heat insulation plate, and the hollow cavity can be further filled with a heat insulation cotton heat insulation structure, so as to have the required heat insulation effect while ensuring the structural strength. The amplitude modulation nut 308 and / or the driving control device are located in the hollow cavity of the heat preservation layer structure or are arranged outside the cross-pulling box body 100, so as to avoid the threads of the screw rod nut transmission mechanism being seriously affected or even failing due to thermal deformation.

[0045] Preferably, the cross-pulling frame 302 is provided with two sections of amplitude modulation rails 303, the two sections of amplitude modulation rails 303 are independent and have a spacing distance therebetween, and the two guide rail fixing seats 301 are respectively connected with the two sections of amplitude modulation rails 303 in a sliding manner. The basic structure of the guide rail fixing seat and the amplitude modulation rail can be used in the prior art or other feasible schemes, which will not be described here. In this scheme, the amplitude modulation rail 303 is also arranged in a segmented manner, compared with the whole rail in the prior art, which can avoid the problem that the amplitude modulation rail 303 is squeezed and deformed due to thermal expansion, thereby affecting the amplitude modulation function.

[0046] More specifically, in the preferred embodiment, the (at least part of) the synchronizing mechanism of the amplitude modulation mechanism is arranged inside the amplitude modulation rail frame 304, and the amplitude modulation rail 303 is arranged on the outer surface (e.g. above) of the amplitude modulation rail frame 304. Since the amplitude modulation rail frame 304 separates the high-temperature environment inside the cross-lapper machine cross-lapper box 100 from the inside of the amplitude modulation rail frame 304, a part of the heat can be isolated (or a heat insulation layer can be arranged inside the amplitude modulation rail frame 304 for further heat insulation), so that the temperature inside the amplitude modulation rail frame 304 is lower than the high temperature outside, which is conducive to the operation of the synchronizing mechanism; for example, the part of the synchronizing mechanism inside the amplitude modulation rail frame 304 is a cable, or an amplitude modulation synchronizing shaft 306 in the specific embodiment shown, and reducing the temperature difference can avoid significant thermal deformation of the structure, and for the circuit control mode, it is also helpful to improve the service life of the circuit, etc. The amplitude modulation rail frame 304 (cross-lapper frame 302) is supported and positioned by a fixed column structure arranged at the bottom by means of bolts, for example, and the fixed column structure can be optionally arranged to pass through the lower end to the outside of the cross-lapper box 100.

[0047] The amplitude modulation mechanism is preferably a lead screw mechanism (e.g. a ball screw mechanism), which mainly includes an amplitude modulation lead screw 307 and an amplitude modulation nut 308 which is matched (threaded) to the outside of the amplitude modulation lead screw 307, and a positioning partition member 309, which is, for example, cylindrical, and the amplitude modulation lead screw 307 is connected and fixed with the inner side wall plate 305 through the positioning partition member 309, and the positioning partition member 309 is sleeved on the amplitude modulation lead screw 307. More specifically, the positioning partition member 309 is fixedly connected with the inner side wall plate 305 through, for example, a flange and a bolt structure, and the amplitude modulation lead screw 307 is slidingly connected with the positioning partition member 309. The positioning partition member 309 is sleeved on the outer side end of the amplitude modulation lead screw 307, and the inner side end of the amplitude modulation lead screw 307 is connected with the guide rail fixed seat 301. Wear-resistant and high-temperature-resistant inner sleeve rings are arranged at both ends inside the positioning partition member 309, and the wear-resistant and high-temperature-resistant inner sleeve rings are sleeved on the amplitude modulation lead screw 307. The wear-resistant and high-temperature-resistant inner sleeve rings include a wear-resistant sleeve 319 and a partition sleeve 320, the wear-resistant sleeve 319 is located at one end of the positioning partition member 309 close to the guide rail fixed seat 301, and the wear-resistant sleeve 319 is preferably, for example, a brass sleeve ring, which has the characteristics of high temperature resistance; the partition sleeve 320 is located at one end of the positioning partition member 309 away from the guide rail fixed seat 301, and the partition sleeve 320 is preferably, for example, a polytetrafluoroethylene gasket, which has the characteristics of wear resistance and high temperature resistance.

[0048] The amplitude modulation nut 308 is threadedly matched with the outside of the amplitude modulation lead screw 307, so that as the amplitude modulation nut 308 rotates, the amplitude modulation lead screw 307 and the guide rail fixed seat 301 will move horizontally. The thread directions of the two amplitude modulation lead screws 307 of the two guide rail fixed seats 301 are opposite, so that when the two amplitude modulation nuts 308 rotate synchronously and in the same direction, the two guide rail fixed seats 301 will simultaneously move closer to or farther away from each other.

[0049] The guide rail fixing seat 301 is connected with the amplitude adjusting screw rod 307 in the following manner, for example, a baffle is installed on the side of the guide rail fixing seat 301, the baffle has an L-shaped cross section, a space is formed between the baffle and the side of the guide rail fixing seat 301 to accommodate the head of a screw, the rod of the screw is connected with the amplitude adjusting screw rod 307; according to actual needs and the specific arrangement manner of the screw rod mechanism, the guide rail fixing seat 301 can be fixed with the amplitude adjusting screw rod 307, or the screw head and the baffle are matched to realize rotary connection (or a bearing is further arranged to realize rotary connection), so as to realize the function of the screw rod mechanism or increase the flexibility of the structure.

[0050] Preferably, the synchronization mechanism adopts a mechanical transmission manner, including a transversely arranged amplitude adjusting synchronization shaft 306, both ends of the amplitude adjusting synchronization shaft 306 are rotatably connected with the inner side wall plate 305 through, for example, bearings, and both ends of the amplitude adjusting synchronization shaft 306 are respectively connected with two amplitude adjusting mechanisms. The amplitude adjusting synchronization shaft 306 is located in the amplitude adjusting rail frame 304, the amplitude adjusting rail frame 304 has a hollow tubular structure, and both ends of the amplitude adjusting rail frame 304 are preferably connected with the inner side wall plate 305, so that the amplitude adjusting synchronization shaft 306 is basically isolated from the internal structure of the transverse pull box body 100. The amplitude adjusting synchronization shaft 306 is sleeved with an amplitude adjusting driving sprocket 310 at both ends, the amplitude adjusting nut 308 is rotatably connected with the inner side wall plate 305 through a bearing, the amplitude adjusting nut 308 is coaxially connected with an amplitude adjusting driven sprocket 311, and the amplitude adjusting driving sprocket 310 and the amplitude adjusting driven sprocket 311 are connected with an amplitude adjusting transmission chain 312. The amplitude adjusting synchronization shaft 306 is connected with a driving control device, for example, the amplitude adjusting synchronization shaft 306 is connected with an amplitude adjusting driving motor 313 and / or an amplitude adjusting hand wheel 314. The amplitude adjusting synchronization shaft 306 rotates as a driving part, so that the two amplitude adjusting driven sprockets 311 at both ends are driven to rotate by the amplitude adjusting synchronization shaft 306. This kind of synchronous transmission manner has high synchronization effect and transmission efficiency; further, the two amplitude adjusting nuts 308 on both sides rotate at the same time, and since the inner side end of the amplitude adjusting screw rod 307 is rotatably connected with the guide rail fixing seat 301 and the guide rail fixing seat 301 is slidably connected with the transverse pull frame 302, the amplitude adjusting screw rod 307 is limited and cannot rotate freely, but translates under the threaded cooperation relationship with the rotation of the amplitude adjusting nut 308, so as to drive the guide rail fixing seat 301 to translate.

[0051] The amplitude adjusting synchronization shaft 306 is parallel to the amplitude adjusting screw rod 307 and the amplitude adjusting rail 303, and is transversely arranged, so that the overall structure is clear and neat. It can be conceived that since the chain and sprocket transmission manner is adopted, it can also withstand a certain degree of inclination and deviation; it can be considered that the amplitude adjusting rail 303 is arranged obliquely according to needs, etc. These easily conceived variant embodiments do not deviate from the concept of the present application.

[0052] Please refer to Figure 10The drive control device connected to one end of the amplitude modulation synchronous shaft 306 further comprises a gearbox 317, which has two input ends, one connected to the amplitude modulation drive motor 313 and the other connected to the amplitude modulation hand wheel 314. The output end of the gearbox 317 is the output shaft of the drive control device connected to the amplitude modulation synchronous shaft 306, so that the motor control can be realized, and the manual adjustment can be realized through the hand wheel. More preferably, the amplitude modulation synchronous shaft 306 is further connected to a position display device 315 and / or an automatic control device 316. The position display device 315, for example, comprises a sensor and a display, and can display the position information of the guide rail fixing seat in digital form for viewing during adjustment. The automatic control device 316 is connected to the gearbox 317 or the amplitude modulation drive motor 313, and can realize remote control through wired or wireless mode. The amplitude modulation drive motor 313, the amplitude modulation hand wheel 314, the position display device 315 and the automatic control device 316 are linked together, and the adjustment of the electric drive or the manual drive or the remote control will affect the actual data displayed by the position display device 315. The information of the position display device 315 can be obtained by the remote end, so as to realize the flexible adjustment mode of automatic control as the main and manual control as the auxiliary, and ensure the accuracy of the horizontal stretching amplitude.

[0053] In the prior art, the drive control device and related bearings and other components, as well as the position of the screw and the nut thread connection, are located in the horizontal stretching box body 100, which is not conducive to the service life of these mechanical structures due to long-term work in high temperature, especially for threaded connection, thermal deformation will cause it to lose function. On the basis of the prior art, the thread tolerance between the thread and the screw can be considered to be increased to adapt to the high temperature area, but it will lead to a decrease in precision. In the present scheme, preferably, the side wall of the horizontal stretching box body 100 has a heat preservation layer structure, and the amplitude modulation nut of the screw mechanism and the drive control device are located in the heat preservation layer structure or outside the horizontal stretching box body 100. The threaded matching part of the screw mechanism is isolated from the high temperature environment inside the box, and the working environment temperature can be reduced by more than 100℃, thereby avoiding the above-mentioned problems caused by high temperature; the chain, sprocket and other structures are also located in the heat preservation layer structure; the drive control device is located outside the screw mechanism, preferably outside the horizontal stretching box body 100, which effectively improves the service life and enables electronic components to be better used in the drive control device to realize automatic / remote control, etc.

[0054] In summary, the film transverse stretching machine of the utility model, adopt negative pressure air curtain device at film entrance, carry on air extraction by two air extraction parts arranged oppositely simultaneously, form negative pressure air curtain in the passageway space between two air extraction parts, the gas close to film entrance is sucked away, thereby effectively avoid the problem of solvent gas escaping without affecting film conveying. And, the amplitude modulation device is improved in the scheme, the two sides amplitude modulation mechanism are separately arranged, two guide rail fixing bases have larger space to move left and right to adapt the deformation amount of thermal expansion, ensure that the structure will not be stressed and deformed and damaged due to thermal expansion, and the two amplitude modulation mechanisms can be controlled synchronously, so that the two guide rail fixing bases are symmetrically close or far away, which is convenient for operation, and the synchronous mechanism is arranged in the hollow pipe body of the amplitude modulation rail frame of the transverse stretching rack, and the amplitude modulation nut of the screw rod mechanism is arranged outside the internal space of the box body, so that a certain temperature can be blocked, the structure can be stably operated, the service life is prolonged, and a higher temperature processing process can be realized.

Claims

1. A film transverse stretching machine, characterized by, It includes a transverse pulling box (100), a film inlet (101) is arranged at one end of the transverse pulling box (100), and a film outlet is arranged at the other end of the transverse pulling box (100); a negative pressure air curtain device (200) is arranged at the film inlet (101) and the film outlet of the transverse pulling box (100), the negative pressure air curtain device (200) comprises oppositely arranged first and second air extraction parts (201) and (202), the first and second air extraction parts (201) and (202) are respectively located on the two sides of the film, a channel space (204) for the film to pass through is formed between the first and second air extraction parts (201) and (202), the width of the channel space (204) is adapted to the width of the film, and the film inlet (101) and the film outlet are in the form of a slit adapted to the film.

2. The film transverse stretching machine according to claim 1, characterized in that, Air curtain flow uniformity plates (203) are arranged on the first and second air extraction parts (201) and (202), the air curtain flow uniformity plates (203) are arranged in parallel or inclined along the film conveying direction, and the air curtain flow uniformity plates (203) are provided with air holes or slit holes.

3. The film transverse stretching machine according to claim 2, characterized in that, The air curtain flow uniformity plates (203) are single-layer structures, or the air curtain flow uniformity plates (203) are arranged in multiple layers, and the air holes or slit holes of each layer are oppositely arranged or staggered.

4. The film transverse stretching machine according to claim 1, characterized in that, The channel space (204) is provided with a partition part adapted to the thickness of the film at the inlet and / or outlet, and the partition part at the inlet of the channel space (204) forms the film inlet (101) of the transverse pulling box (100).

5. The film transverse stretching machine according to claim 4, characterized in that, The partition part comprises a slit baffle (206) arranged on the first and / or second air extraction part (201) and (202).

6. The film transverse stretching machine according to claim 5, characterized in that, The partition part further comprises channel side plates (205) arranged on the two sides of the first and second air extraction parts (201) and (202), and the channel side plates (205) and the first and second air extraction parts (201) and (202) jointly form the side walls of the channel space (204).

7. The film transverse stretching machine according to any one of claims 1 to 6, characterized in that, An amplitude adjusting device (300) is arranged in the film transverse stretching machine, the amplitude adjusting device (300) comprises two transversely arranged guide rail fixing seats (301), the guide rail fixing seats (301) are arranged in the transverse pulling box (100), the transverse pulling box (100) further comprises a transverse pulling frame (302), each guide rail fixing seat (301) is slidably arranged on the transverse pulling frame (302), each guide rail fixing seat (301) is connected with an amplitude adjusting mechanism, and each amplitude adjusting mechanism drives the guide rail fixing seat (301) to move independently or synchronously drives the guide rail fixing seat (301) to move through a synchronous mechanism.

8. The film transverse stretching machine according to claim 7, characterized in that, The amplitude adjusting mechanism comprises an amplitude adjusting screw (307) connected with the guide rail fixing seat (301) and an amplitude adjusting nut (308) connected with the amplitude adjusting screw (307), and the amplitude adjusting nut (308) is connected with a driving control device; the transverse pulling frame (302) comprises a transversely arranged amplitude adjusting rail frame (304), the amplitude adjusting rail frame (304) is a hollow support structure, and the synchronous mechanism of the amplitude adjusting mechanism and / or the amplitude adjusting nut (308) and / or the amplitude adjusting screw (307) are arranged in the interior of the amplitude adjusting rail frame (304).

9. The film transverse stretching machine according to claim 8, characterized in that, The outer wall of the transverse pulling box body (100) is a heat preservation layer structure, which comprises an inner side wall plate (305), an outer side wall plate (318) and a hollow cavity between the inner side wall plate (305) and the outer side wall plate (318); the amplitude modulation nut (308) and / or the driving control device are located in the hollow cavity of the heat preservation layer structure or are arranged outside the transverse pulling box body (100).

10. The film transverse stretching machine according to claim 7, characterized in that, Two sections of amplitude modulation tracks (303) are arranged on the transverse pulling frame (302), and the two sections of amplitude modulation tracks (303) have a spacing distance therebetween, and the two guide rail fixing seats (301) are respectively in sliding connection with the two sections of amplitude modulation tracks (303).

Images