Partially external film stretching track and oven device

Abstract

The application relates to the technical field of film stretching, and discloses a partially-external film stretching track and an oven device. The partially-external film stretching track comprises a ring-shaped guide rail. The ring-shaped guide rail comprises a working section and a return section. The working section is connected with the return section. The working section is used for penetrating into a high-temperature oven from an inlet side of the high-temperature oven and penetrating out of the high-temperature oven from an outlet side of the high-temperature oven. The return section is used for penetrating into the high-temperature oven from the outlet side of the high-temperature oven and penetrating out of the high-temperature oven from a stretching area or a preheating area of the high-temperature oven, so that the return section penetrates through the entire heat setting area of the high-temperature oven and is at least partially external to the preheating area of the high-temperature oven. On the one hand, the structure is simplified, and the device cost is reduced; on the other hand, the chain clamp of the return section is better cooled, the influence of the chain clamp with reduced temperature on the film is small when the chain clamp returns to the working section, and film breaking defects can be avoided.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of film stretching, in particular to a partially external film stretching track and oven device. BACKGROUND

[0002] With the development of high polymer film heat treatment technology, an oven device appears, which includes two mutually symmetrical film stretching tracks. The two film stretching tracks are arranged at intervals and are arranged in a high-temperature oven. For each film stretching track, it includes a ring-shaped guide rail, a chain clamp arranged on the ring-shaped guide rail, and a drive chain disc driving the chain clamp to move. The ring-shaped guide rail includes a preheating section, a stretching section, a shaping section, a cooling section, and a return section arranged in sequence along the running direction of the chain clamp. Each drive chain disc cooperates to drive the chain clamp to move along the ring-shaped guide rail in a circular and reciprocating manner. The film is pulled by the chain clamps moving along the line on both sides in the width direction, and is continuously stretched, tensioned or relaxed in the longitudinal and transverse directions or any one direction according to the process requirements.

[0003] The return section in the related art usually adopts a full internal or full external arrangement.

[0004] For the full internal type, the film pulling side (i.e. the working section) of the ring-shaped guide rail and the return section are distributed in the high-temperature oven along the line, and can be simultaneously and independently supported on both sides of the same track beam. However, the chain clamps of the return section run at high speed in the region of different process temperature fields in the high-temperature oven, and the spatial positions of the chain clamps of the return section and the film pulling side are compact, which is not conducive to the control of the temperature field accuracy of the film in each process section. Moreover, the length of the return section accounts for more than 90% of the region in the high-temperature oven, which makes it inconvenient to effectively cool the return section and the chain clamps running on the return section, and the high-temperature chain clamps moving to the inlet side of the high-temperature oven are easy to cause local surface damage to the heat-sensitive materials entering the high-temperature oven, resulting in frequent film breakage.

[0005] For the full external type, the return section is arranged on the periphery of the high-temperature oven. However, the return section needs to be supported by an additional track beam, and the track beam located below the periphery of the high-temperature oven needs to be configured with a support beam and other structures to support the track beam, and due to the long path of the return section, the cost is high. SUMMARY

[0006] Therefore, it is necessary to provide a partially external film stretching track and oven device to solve at least one problem in the prior art, which can reduce the cost, ensure the cooling effect, and effectively reduce the film breakage defect.

[0007] In one aspect, the present application provides a partially external film stretching track, which comprises:

[0008] The annular guide rail comprises a working section and a return section; the working section is connected with the return section; the working section is used to enter the high-temperature oven from the inlet side of the high-temperature oven and to exit from the outlet side of the high-temperature oven; the return section is used to enter the high-temperature oven from the outlet side of the high-temperature oven and to exit from the stretching zone or the preheating zone of the high-temperature oven, so that the return section penetrates through the entire heat setting zone of the high-temperature oven and is at least partially arranged outside the preheating zone of the high-temperature oven.

[0009] In one of the embodiments, the return section is arranged at least partially parallel to the longitudinal direction of the high-temperature oven in the high-temperature oven; and / or, the return section is arranged close to the inner wall of the high-temperature oven in the high-temperature oven.

[0010] In one of the embodiments, the return section comprises a first connecting section, an embedded section and a second connecting section; the first connecting section, the embedded section and the second connecting section are sequentially connected along the return direction of the return section; the first connecting section is connected with the tail end of the working section, the embedded section is arranged in the high-temperature oven, and the second connecting section is connected with the head end of the working section; the first connecting section and the embedded section are arranged at an obtuse angle, the embedded section is parallel to the longitudinal direction of the high-temperature oven, and the embedded section and the second connecting section are arranged at an obtuse angle.

[0011] Alternatively, the return section is arranged in a straight line.

[0012] In one of the embodiments, the return section further comprises a first transition section and a second transition section; the first transition section is connected between the first connecting section and the embedded section, and the second transition section is connected between the embedded section and the second connecting section.

[0013] In one of the embodiments, the partially-embedded film stretching rail further comprises a first chain disc and a second chain disc; the first chain disc is arranged at the inlet side of the high-temperature oven, and the second chain disc is arranged at the outlet side of the high-temperature oven; the head end of the return section is tangent to the second chain disc, and the tail end of the return section is tangent to the first chain disc.

[0014] In one of the embodiments, the partially-embedded film stretching rail further comprises an enclosure; the enclosure is arranged around the return section and extends along the length direction of the return section; an air cooling channel is formed between the enclosure and the return section.

[0015] The shielding member is provided with an air inlet portion at one end close to the inlet side of the high-temperature oven, the shielding member passes through the high-temperature oven along the return section and goes out from the stretching zone or the preheating zone of the high-temperature oven, and the air outlet portion is provided at the position where the shielding member goes out of the high-temperature oven, and the air inlet portion is used to communicate with the air blowing device.

[0016] In another aspect, the application also provides an oven device, comprising a high-temperature oven and two partial external film stretching tracks; the two partial external film stretching tracks are arranged in transverse direction; the working section goes into the high-temperature oven from the inlet side of the high-temperature oven and goes out from the outlet side of the high-temperature oven; and the return section goes into the high-temperature oven from the outlet side of the high-temperature oven and goes out from the stretching zone or the preheating zone of the high-temperature oven.

[0017] In one of the embodiments, the high-temperature oven comprises a support unit; the partial external film stretching track further comprises a first track beam and a second track beam; the first track beam and the second track beam are both mounted on the support unit; the working section is connected with the first track beam, and the return section is connected with the second track beam.

[0018] In one of the embodiments, the support unit comprises:

[0019] two columns, the two columns are arranged in transverse direction and are used to be fixed on the ground or the table top;

[0020] a support beam, the support beam is connected with the two columns in transverse direction at opposite ends; and when the support beam expands or shrinks, the end of the support beam can move relative to the corresponding column in transverse direction;

[0021] a supporting member, the supporting member is connected between the support beam and the second track beam, the supporting member is connected with the second track beam, and the supporting member is slidably arranged on the support beam in transverse direction;

[0022] and a limiting member, the limiting member is fixedly connected with the column, and the limiting member is further fixedly connected with at least one of the supporting member and the second track beam.

[0023] In one of the embodiments, the supporting member comprises two first supporting plates; the two first supporting plates are arranged in transverse direction and are respectively located at opposite sides of the support beam in longitudinal direction, and the first supporting plate is provided with a roller; the opposite sides of the support beam in longitudinal direction are both provided with a slide rail extending in transverse direction, and the roller is in sliding cooperation with the slide rail.

[0024] The supporting member further comprises a second supporting plate, and the two first supporting plates are connected through the second supporting plate.

[0025] The second track beam comprises two split parts corresponding to the support, and the two split parts are sequentially arranged along the longitudinal direction; one of the split parts is fixedly connected with the support, and the other split part is in sliding fit with the support along the longitudinal direction.

[0026] The return section is provided with telescopic pairs.

[0027] The above-mentioned partial external thin film stretching track and oven device, on the one hand, at least part of the return section is arranged in the high-temperature oven, and the area of the return section arranged in the high-temperature oven and the working section arranged in the high-temperature oven can share the support beam, without the need to separately configure the support beam, so that the structure is simplified, and the device cost is reduced; and compared with the full external arrangement mode of the return section in the related art, the application can shorten the path length of the return section, and then shorten the length of the chain clamp, thereby reducing the device cost; on the other hand, the return section passes out of the high-temperature oven from the stretching area of the high-temperature oven, that is, at least part of the return section is arranged outside the high-temperature oven, and the temperature of the area of the return section arranged outside the high-temperature oven is less affected by the high-temperature oven, so that the chain clamp is better cooled, and the chain clamp temperature is reduced, which has little effect on the film when returning to the working section, so that the film breaking defect can be avoided. BRIEF DESCRIPTION OF DRAWINGS

[0028] Figure 1 FIG. 1 is a structural diagram of an oven device according to an embodiment of the present application.

[0029] Figure 2 FIG. 2 is a structural diagram of a return section and a heat setting section in the oven device shown in FIG. 1. Figure 1 FIG. 3 is a structural diagram of the return section and the heat setting section in the oven device shown in FIG. 1, which are installed on the same support beam.

[0030] Figure 3 FIG. 4 is an enlarged structural diagram of A in FIG. 3. Figure 2

[0031] Figure 4 FIG. 5 is a structural diagram of the structure shown in FIG. 3, which is additionally provided with a shielding member. Figure 2 BRIEF DESCRIPTION OF REFERENCE NUMERALS:

[0032]

[0033] ​​10, high-temperature oven; 101, inlet side; 102, outlet side; 103, preheating zone; 104, stretching zone; 105, heat setting zone; 106, cooling zone; 11, supporting unit; 111, stand column; 1111, groove; 112, supporting beam; 1121, slide rail; 113, supporting piece; 1131, first supporting plate; 1132, second supporting plate; 1133, roller; 1134, protrusion; 114, limiting piece; 20, partially external thin film stretching track; 21, chain clamp; 22, annular guide rail; 221, working section; 2211, preheating section; 2212, stretching section; 2213, heat setting section; 2214, cooling section; 222, return section; 2221, first connecting section; 2222, built-in section; 2223, second connecting section; 2224, first transition section; 2225, second transition section; 2226, telescopic pair; 22261, first splicing part; 22262, second splicing part; 23, driving chain disc; 231, first chain disc; 232, second chain disc; 24, enclosure; 25, first track beam; 26, second track beam; 261, split part; 2611, waist-shaped hole; 30, thin film. DETAILED DESCRIPTION

[0034] In order to make the above objectives, features and advantages of the present application more apparent, specific embodiments of the present application are described in detail below with reference to the accompanying drawings. In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present application. However, the present application can be practiced in a variety of ways other than those described herein without departing from the spirit of the present application, and it is understood that similar modifications can be made by those skilled in the art in the light of the foregoing description, and therefore the present application is not limited to the following disclosed specific embodiments.

[0035] As described in the background, when the return section is in a full built-in mode in the related art, the temperature of the chain clamp running to the return section is not significantly reduced and is still in a high-temperature state, and the high-temperature chain clamp will affect the temperature field precision control of the thin film in each process section. Moreover, if the temperature of the high-temperature chain clamp is not reduced in time, the hot-sensitive material entering the high-temperature oven will be easily damaged locally when moving to the inlet side of the high-temperature oven. When the return section is in a full external mode, the high-temperature chain clamp and the return section can be cooled, but the return section needs to be supported by an additional track beam, and the track beam located below the periphery of the high-temperature oven needs to be configured with a supporting beam and the like, and due to the long path of the return section, the cost is relatively high.

[0036] Based on this, the present application provides a partially external thin film stretching track and oven device, which can reduce the cost, ensure the cooling effect, and effectively reduce the film breakage defect.

[0037] It should be noted that the partial external film stretching track of the present application includes but is not limited to a film synchronous stretching track or a film step-by-step stretching track, and the specific setting can be based on actual needs, which is not limited herein.

[0038] It should be noted that in the present embodiment, the transverse direction refers to the width direction of the film, or the width direction of the high-temperature oven, i.e., the direction indicated by the arrow Y in FIG. 1; the longitudinal direction refers to the length direction of the film, or the movement direction of the film, or the length direction of the high-temperature oven, i.e., the direction indicated by the arrow X in FIG. 1. Figure 1 Figure 1

[0039] The partial external film stretching track and the oven device of the present application will be described in detail below. Figures 1 to 4

[0040] Please refer to Figure 1 , Figure 1 FIG. 1 shows a structural schematic diagram of an oven device according to an embodiment of the present application. The oven device provided by the present embodiment includes a high-temperature oven 10 and two partial external film stretching tracks 20. The high-temperature oven 10 is provided with a preheating zone 103, a stretching zone 104, a heat setting zone 105, and a cooling zone 106 arranged in sequence along the longitudinal direction of the film 30. The two partial external film stretching tracks 20 are arranged side by side and spaced apart and cooperate with each other, and are used to clamp and pull the film 30 into the high-temperature oven 10, so that the film 30 is subjected to various treatments in the high-temperature oven 10. Specifically, the two partial external film stretching tracks 20 clamp the opposite sides of the film 30 in the transverse direction at the inlet side 101 of the high-temperature oven 10, respectively, and provide power to pull the film 30 into the high-temperature oven 10, so that the film 30 is subjected to various treatments including but not limited to preheating, stretching, heat setting, and cooling in the high-temperature oven 10. After the film 30 is treated in the high-temperature oven 10 and leaves the high-temperature oven 10, the two partial external film stretching tracks 20 loosen the film 30 at the outlet side 102 of the high-temperature oven 10, and the film 30 continues to move forward into the next process.

[0041] Optionally, the two partial external film stretching tracks 20 are arranged symmetrically. It can also be understood that the structure and shape of the two partial external film stretching tracks 20 are completely the same. Of course, in some optional schemes, the structure and shape of the two partial external film stretching tracks 20 can also not be completely consistent, as long as they can pull the opposite sides of the film 30 respectively and drive the film 30 to run along the respective annular tracks according to the process requirements. This is not limited herein and is within the protection scope of the present application.

[0042] Please refer to Figures 1 to 4 ​​​The following will describe a partial external film stretching track 20 according to an embodiment of the present application. The partial external film stretching track 20 includes a chain clamp 21. The chain clamp 21 is used to clamp one side of the film 30 in the transverse direction. The chain clamps 21 of two partial external film stretching tracks 20 are respectively used to clamp opposite sides of the film 30 in the transverse direction.

[0043] The partial external film stretching track 20 further includes a ring guide track 22 and a driving chain disc 23. The ring guide track 22 is used to support and guide the chain clamp 21. The driving chain disc 23 is connected with the chain clamp 21 and is used to drive the chain clamp 21, so that the chain clamp 21 moves along the ring guide track 22 in a reciprocating manner. The driving chain disc 23 can be two, three or four, and can be flexibly adjusted and set according to actual needs. Specifically, the driving chain disc 23 is two, for example, including a first chain disc 231 and a second chain disc 232. The first chain disc 231 is arranged at the inlet side 101 of the high-temperature oven 10, and the second chain disc 232 is arranged at the outlet side 102 of the high-temperature oven 10.

[0044] The two annular guide rails 22 comprise a working section 221 and a return section 222. The working section 221 is connected with the return section 222. The working section 221 penetrates into the high-temperature oven 10 from the inlet side 101 of the high-temperature oven 10 and penetrates out of the high-temperature oven 10 from the outlet side 102 of the high-temperature oven 10. Optionally, the working section 221 comprises a preheating section 2211, a stretching section 2212, a heat setting section 2213 and a cooling section 2214 connected in sequence. The preheating section 2211 is arranged in the preheating zone 103 of the high-temperature oven 10, the stretching section 2212 is arranged in the stretching zone 104 of the high-temperature oven 10, the heat setting section 2213 is arranged in the heat setting zone 105 of the high-temperature oven 10, and the cooling section 2214 is arranged in the cooling zone 106 of the high-temperature oven 10. The distance W1 between the preheating sections 2211 of the two annular guide rails 22 is constant or substantially constant along the running direction of the film 30, and the deviation is controlled within ±5%; the distance W2 between the stretching sections 2212 of the two annular guide rails 22 increases along the running direction of the film 30; the distance W3 between the heat setting sections 2213 of the two annular guide rails 22 is constant or substantially constant along the running direction of the film 30, and the deviation is controlled within ±5%; and the distance W4 between the cooling sections 2214 of the two annular guide rails 22 is constant or substantially constant along the running direction of the film 30, and the deviation is controlled within ±5%. The chain clips 21 are driven by the first chain disc 231 and enter the working section 221, i.e. enter the high-temperature oven 10 from the inlet side 101 of the high-temperature oven 10. During the running of the chain clips 21 along the working section 221, the chain clips 21 hold the film 30 to drive the film 30 to perform various treatments such as preheating, transverse stretching, heat setting and cooling. The chain clips 21 release the film 30 from the working section 221 to the return section 222. Under the driving force provided by the second chain disc 232, the chain clips 21 return along the return section 222 to the first chain disc 231. The first chain disc 231 drives the returned chain clips 21 to enter the high-temperature oven 10 and enter the next cycle.

[0045] For example, the return section 222 penetrates into the high-temperature oven 10 from the outlet side 102 of the high-temperature oven 10 and penetrates out of the high-temperature oven 10 from the stretching zone 104 or the preheating zone 103, so that the return section 222 penetrates through the entire heat setting zone 105 of the high-temperature oven 10 and at least partially protrudes out of the preheating zone 103 of the high-temperature oven 10. That is, the return section 222 does not penetrate through the entire preheating zone 103 of the high-temperature oven 10 or the entire stretching zone 104 of the high-temperature oven 10.

[0046] In order to reduce the size of the high-temperature oven 10 as much as possible and increase the cooling time of the chain gripper 21 before returning to the inlet side 101 of the high-temperature oven 10, the return section 222 in the embodiment preferably extends out from the stretching zone 104 of the high-temperature oven 10, so that the return section 222 is completely outside the preheating zone 103 of the high-temperature oven 10, that is, the return section 222 does not enter the preheating zone 103 of the high-temperature oven 10, but directly returns to the inlet side 101 of the high-temperature oven 10 from outside the high-temperature oven 10 after extending out from the stretching zone 104 of the high-temperature oven 10. The chain gripper 21 is in the return phase after being turned by the second chain disc 232, and then returns to enter the high-temperature oven 10 and passes through the heat setting section 2213 with the maximum width and at least part of the stretching zone 104. The return section 222 extends out from the high-temperature oven 10 at the stretching zone 104 and is outside the preheating zone 103 with the minimum width. The distance between the return section 222 and the stretching section 2212 gradually increases along the return direction of the chain gripper 21, so that the negative effect of the high-temperature chain gripper 21 on the temperature field accuracy of the film 30 clamped by the stretching section 2212 is basically negligible. Moreover, the return section 222 is outside the high-temperature oven 10 for a long time, which can facilitate the cooling effect of the high-temperature chain gripper 21 and accurately control the cooling temperature.

[0047] In order to facilitate the return section 222 to extend out from the stretching zone 104 of the high-temperature oven 10, on the basis of the foregoing embodiment, please refer to Figure 1 The high-temperature oven 10 is arranged in a stepped shape along the corresponding positions of the preheating zone 103 and the stretching zone 104 on the opposite sides in the transverse direction. Specifically, the distance between the opposite sides of the high-temperature oven 10 in the transverse direction increases in a stepped shape along the running direction of the film 30. In this way, on the one hand, the return section 222 can extend out from the stretching zone 104 of the high-temperature oven 10 and be outside the preheating zone 103; on the other hand, the size of the high-temperature oven 10 can be reduced. Moreover, the position where the return section 222 extends out from the stretching zone 104 of the high-temperature oven 10 is a certain distance away from the film 30 in the transverse direction, and the cold air outside the high-temperature oven 10 has little effect on the quality of the film 30 at the stretching zone 104.

[0048] The partial external film stretching track 20 described above, on the one hand, at least part of the return section 222 is arranged in the high-temperature oven 10, and the area of the return section 222 arranged in the high-temperature oven 10 can share the support beam 112 with the working section 221 arranged in the high-temperature oven 10, without the need to separately arrange the support beam 112, so as to simplify the structure and reduce the cost of the device; compared with the full external arrangement of the return section in the related art, the present application can shorten the path length of the return section 222, thereby shortening the length of the chain clamp 21 and reducing the cost of the device; on the other hand, the return section 222 passes out of the high-temperature oven 10 from the stretching area 104 of the high-temperature oven 10, that is, at least part of the return section 222 is arranged outside the high-temperature oven 10, and the temperature of the area of the return section 222 arranged outside the high-temperature oven 10 is less affected by the high-temperature oven 10, so that the chain clamp 21 is better cooled, and the temperature of the chain clamp 21 is reduced, which has little effect on the film 30 when returning to the working section 221, so as to avoid the film breaking defect.

[0049] For example, at least part of the return section 222 arranged in the high-temperature oven 10 is parallel to the longitudinal direction of the high-temperature oven 10. Moreover, the part of the return section 222 arranged in the high-temperature oven 10 is arranged close to the inner wall of the high-temperature oven 10. That is, the part of the return section 222 arranged in the high-temperature oven 10 is relatively far away from the high-temperature chain clamp 21 and the film 30 running on the working section 221. In this way, the high-temperature chain clamp 21 running on the return section 222 has little effect on the temperature field of the film 30 due to the large distance from the film 30, so that the production quality of the film 30 is guaranteed.

[0050] On the basis of the foregoing embodiments, the return section 222 includes, but is not limited to, any one or a combination of a straight line, a broken line, a curve, etc.

[0051] In the full external scheme of the return section in the related art, the return section returns from the outlet side of the high-temperature oven to the inlet side of the high-temperature oven along the outer wall of the high-temperature oven, and the shape of the return section is approximately C-shaped, and the path length is relatively long; in the full internal scheme of the return section in the related art, the return section usually returns to the inlet side of the high-temperature oven by adapting to the shape of the working section, and the shape of the return section is approximately Z-shaped, and the path length is relatively long, and the close distance between the return section and the working section will affect the temperature field of the film and cause the quality of the film product to be affected. Based on this, in some embodiments, the return section 222 is specifically developed with a straight line as an example. When the return section 222 adopts a straight line design, on the one hand, the path length of the return section 222 is small, so that the number of chain clamps 21 is reduced, and the load of bearing and driving is correspondingly reduced, thereby reducing the cost. On the other hand, from the perspective of mechanics, when the second chain disc 232 is in action, the force transmission effect of the chain clamp 21 will be more obvious.

[0052] It should be noted that the "straight line" in the present application is not a strict "straight line" in the mathematical sense, but a "straight line" judged by the human eye, which allows for deviations from the theoretical "straight line".

[0053] Wherein, the first chain disc 231 and the second chain disc 232 are both taken as an example, and the return segment 222 extends from the second chain disc 232 to the first chain disc 231. Generally, the transverse distance between the second chain disc 232 and the center line of the high-temperature oven 10 is greater than the transverse distance between the first chain disc 231 and the center line of the high-temperature oven 10. Therefore, the return segment 222 can be alternatively designed in a zigzag shape. Moreover, the angle between two adjacent line segments in the zigzag shape is an obtuse angle, for example, 150° to 175°, etc. That is, the return segment 222 approximates to a "straight line", and compared with the full-external or full-internal return segment in the related art, the length of the return segment 222 is smaller, so that the cost is reduced, and the chain clamp 21 has a better force transmission effect; at the same time, compared with the straight line, the design of the zigzag-shaped return segment 222 is more flexible, which can extend from the second chain disc 232 to the first chain disc 231 according to the actual demand, and can reasonably and fully utilize the internal space of the high-temperature oven 10, and can make the return segment 222 as far as possible from the working segment 221 and the film 30, so that the temperature field influence of the high-temperature chain clamp 21 running along the return segment 222 on the film 30 is reduced.

[0054] Please refer to Figure 1In some specific embodiments, the return section 222 comprises a first connecting section 2221, an inbuilt section 2222 and a second connecting section 2223. The first connecting section 2221, the inbuilt section 2222 and the second connecting section 2223 are sequentially connected along the return direction of the return section 222. The first connecting section 2221 is connected to the tail end of the working section 221, and the first connecting section 2221 penetrates into the high-temperature oven 10 from the outlet side 102 of the high-temperature oven 10. The inbuilt section 2222 runs through the entire heat setting zone 105 of the high-temperature oven 10, and the inbuilt section 2222 extends outwards through the stretching zone 104 of the high-temperature oven 10. The second connecting section 2223 is connected to the head end of the working section 221, and the entire second connecting section 2223 is located outside the high-temperature oven 10. The chain gripper 21 running to the tail end of the working section 221 runs outside the high-temperature oven 10 and is driven by the power of the second chain disc 232 to the first connecting section 2221. The chain gripper 21 is guided into the high-temperature oven 10 through the first connecting section 2221 and runs to the inbuilt section 2222. The chain gripper 21 is guided to run through the entire heat setting zone 105 of the high-temperature oven 10 through the inbuilt section 2222 and enters the stretching zone 104 of the high-temperature oven 10, for example, runs through at least one stretching unit of the stretching zone 104, moves out of the high-temperature oven 10 from the stretching zone 104, and runs to the second connecting section 2223. The second connecting section 2223 is entirely located outside the high-temperature oven 10, and the chain gripper 21 running on the second connecting section 2223 is better cooled, and is driven by the second connecting section 2223 to the first chain disc 231. Under the power of the first chain disc 231, the chain gripper 21 returns to the head end of the working section 221.

[0055] On the basis of the foregoing embodiments, the first connecting section 2221 and the inbuilt section 2222 are arranged at an obtuse angle. The included angle between the first connecting section 2221 and the inbuilt section 2222 is, for example, 150° to 175°, and the like, and can be adjusted according to actual needs, which is not limited herein. The inbuilt section 2222 is parallel to the longitudinal direction of the high-temperature oven 10. The inbuilt section 2222 and the second connecting section 2223 are arranged at an obtuse angle. The included angle between the inbuilt section 2222 and the second connecting section 2223 is, for example, 150° to 175°, and the like, and can be adjusted according to actual needs, which is not limited herein.

[0056] In some embodiments, the return section 222 further comprises a first transition section 2224 and a second transition section 2225. Each of the first transition section 2224 and the second transition section 2225 comprises, but is not limited to, an arc-shaped section. The first transition section 2224 is connected between the first connecting section 2221 and the built-in section 2222, and functions as a transition to allow the chain gripper 21 to smoothly run from the first connecting section 2221 to the built-in section 2222, reduce abrasion, and reduce the power loss of the chain gripper 21. Similarly, the second transition section 2225 is connected between the built-in section 2222 and the second connecting section 2223, and functions as a transition to allow the chain gripper 21 to smoothly run from the built-in section 2222 to the second connecting section 2223, reduce abrasion, and reduce the power loss of the chain gripper 21.

[0057] In some embodiments, the leading end of the return section 222 is tangent to the second chain disc 232, and the trailing end of the return section 222 is tangent to the first chain disc 231. Specifically, the leading end of the first connecting section 2221 is tangent to the second chain disc 232, and the trailing end of the second connecting section 2223 is tangent to the first chain disc 231. In this way, the chain gripper 21 can smoothly enter the return section 222 from the second chain disc 232, reduce abrasion, and reduce the power loss of the chain gripper 21; the chain gripper 21 can smoothly return to the first chain disc 231 from the return section 222, reduce abrasion, and reduce the power loss of the chain gripper 21.

[0058] Referring to Figure 1 and Figure 4 , for example, the partially-extruded thin-film stretching track 20 further comprises a shielding member 24. The shielding member 24 is arranged around the return section 222 and extends along the length direction of the return section 222. The shielding member 24 can function as a shield to avoid the influence of the high-speed chain gripper 21 on the environment along the line, ensure cleanliness, and improve the processing quality of the thin film 30.

[0059] On the basis of the foregoing embodiments, a wind cooling channel is formed between the shielding member 24 and the return section 222. During the running of the high-temperature chain gripper 21 to the return section 222, cold air can be introduced into the wind cooling channel, and the heat of the return section 222 and the high-temperature chain gripper 21 can be carried away by the cold air, so that the high-temperature chain gripper 21 has a good cooling effect; and the shielding member 24 functions as a wind barrier to prevent the cold air from interfering with the internal environment of the high-temperature oven 10, prevent the high-speed chain gripper 21 from being affected by the temperature field outside the shielding area, improve the control accuracy and stability of the temperature field of the thin film 30 in each process section, and improve the cooling efficiency of the chain gripper 21.

[0060] Optionally, the enclosure 24 includes, but is not limited to, an enclosure cover or other enclosure structure. In this embodiment, the enclosure 24 is specifically taken as an enclosure cover as a specific example, which is arranged on the return section 222 and specifically encloses the upper side and the opposite two sides along the transverse direction of the return section 222. Both the enclosure cover and the return section 222 are arranged on the track beam for stable support provided by the track beam.

[0061] It can be understood that any position of the enclosure 24 along the length direction thereof can be used for the cold air to enter the air cooling channel, and the cold air can play a cooling role after entering the air cooling channel. In order to improve the cooling effect, for example, one end of the enclosure 24 close to the inlet side 101 of the high-temperature oven 10 is provided with an air inlet part, the enclosure 24 is arranged in the high-temperature oven 10 following the return section 222 and is arranged to pass out of the high-temperature oven 10 from the stretching zone 104 or the preheating zone 103, and the part of the enclosure 24 passing out of the high-temperature oven 10 is provided with an air outlet part. The air inlet part is used to communicate with the air blowing device. The air blowing device is, for example, a blower or the like. The air blowing device sends the cold air into the air cooling channel through the air inlet part, and the cold air cools the high-temperature chain gripper 21 running on the return section 222 during the flow process in the air cooling channel, and then is discharged outwardly through the air outlet part. The flow direction of the cold air in the air cooling channel is opposite to the running direction of the high-temperature chain gripper 21 on the return section 222, which can improve the cooling efficiency of the high-temperature chain gripper 21.

[0062] Please refer to Figure 2 and Figure 3 In some embodiments, the high-temperature oven 10 includes a support unit 11. The partially external thin film stretching track 20 further includes a first track beam 25 and a second track beam 26. The first track beam 25 and the second track beam 26 can be independently arranged or integrally arranged, which is not limited herein and can be arranged according to actual needs. The first track beam 25 and the second track beam 26 are both arranged on the support unit 11. The support unit 11 can simultaneously provide support for the first track beam 25 and the second track beam 26. In other words, the first track beam 25 and the second track beam 26 share the support unit 11, so that the structure is simplified and the cost is reduced. The first track beam 25 can provide support for the working section 221 connected thereto. The second track beam 26 can provide support for the return section 222 connected thereto.

[0063] Optionally, the support unit 11 is arranged in plurality. The plurality of support units 11 are arranged in sequence and spaced apart along the length direction of the high-temperature oven 10. Under the joint action of the plurality of support units 11, the first track beam 25 and the second track beam 26 are stably supported at multiple positions along the longitudinal direction, so that the stability of the working section 221 and the return section 222 is ensured.

[0064] In order to improve the independence of the return section 222 and the working section 221, the first track beam 25 and the second track beam 26 are each completely independent. Specifically, the first track beam 25 and the second track beam 26 are arranged in the lateral direction at intervals on the support unit 11. The second track beam 26 is fixed in position in the lateral direction, and the return section 222 mounted on the second track beam 26 is also fixed in position in the lateral direction, thereby improving the running stability of the chain gripper 21 on the return section 222 and preventing the return section 222 from moving in the lateral direction and affecting the return of the chain gripper 21. The first track beam 25 is adjustable in position in the lateral direction, and the working section 221 mounted on the first track beam 25 is also adjustable in position in the lateral direction, thereby allowing the lateral stretching ratio to be adjusted according to actual needs.

[0065] On the basis of the foregoing embodiment, the support unit 11 includes two uprights 111, a support beam 112, and a support member 113. The two uprights 111 are arranged at intervals in the lateral direction, and the uprights 111 are used to be fixed to the ground or a table top. The two uprights 111 serve as the main support and are not movable in the lateral direction or the longitudinal direction. The support beam 112 is connected to the two uprights 111 at opposite ends in the lateral direction. Optionally, the two uprights 111 are provided with recesses 1111 on the sides facing each other. The ends of the support beam 112 are arranged in the recesses 1111, and the end faces of the support beam 112 and the bottom walls of the recesses 1111 are provided with a gap in the lateral direction. When the support beam 112 expands or contracts in the lateral direction, the ends of the support beam 112 can move adaptively in the lateral direction relative to the corresponding upright 111. The support member 113 is connected between the support beam 112 and the second track beam 26, and the support member 113 is connected to the second track beam 26 and is slidably arranged on the support beam 112 in the lateral direction. When the support beam 112 expands or contracts in the lateral direction, the support beam 112 still stably supports the support member 113, and the support member 113 does not interfere with the displacement of the support beam 112 in the lateral direction.

[0066] Optionally, the support unit 11 further includes a limiting member 114. The limiting member 114 is fixedly connected to the upright 111, and the limiting member 114 is also fixedly connected to at least one of the support member 113 and the second track beam 26. The fixed connection includes, but is not limited to, welding, clamping, riveting, etc. In this way, the second track beam 26 is fixedly connected to the upright 111 which is fixed in position in the lateral direction through the limiting member 114, so that the second track beam 26 is prevented from moving in the lateral direction, the vertical direction, and the longitudinal direction, and the stability of the return section 222 is improved.

[0067] For example, the support member 113 includes two first support plates 1131. The two first support plates 1131 are arranged at opposite sides of the support beam 112 along the longitudinal direction and are provided with rollers 1133.

[0068] On the basis of the foregoing embodiment, the support member 113 further includes a second support plate 1132. The two first support plates 1131 are connected by the second support plate 1132. The second track beam 26 is specifically mounted on the second support plate 1132, for example.

[0069] For example, the second track beam 26 includes two split parts 261 corresponding to the support member 113. The two split parts 261 are arranged in sequence along the longitudinal direction. One of the split parts 261 is fixedly connected with the support member 113, and the other split part 261 is slidably connected with the support member 113 along the longitudinal direction. In this way, when the second track beam 26 is deformed due to thermal expansion or contraction along the longitudinal direction, the other split part 261 can be adaptively slid along the longitudinal direction relative to the support member 113 to absorb and buffer the deformation amount of the second track beam 26 along the longitudinal direction.

[0070] On the basis of the foregoing embodiment, the support member 113 is provided with a protrusion 1134, and the other split part 261 is provided with a waist-shaped hole 2611 extending along the longitudinal direction. The protrusion 1134 is arranged in the waist-shaped hole 2611 and can move in the waist-shaped hole 2611 along the longitudinal direction. That is, when the second track beam 26 is deformed due to heat, the other split part 261 can be adaptively moved along the longitudinal direction through the waist-shaped hole 2611 and is limited along the transverse direction.

[0071] For example, the return section 222 is provided with a telescopic pair 2226. The telescopic pair 2226 can absorb and buffer the deformation amount of the return section 222 along the longitudinal direction due to thermal expansion or contraction. Specifically, the telescopic pair 2226 includes a first splicing part 22261 and a second splicing part 22262 that can be telescopically moved relative to each other along the longitudinal direction. The first splicing part 22261 and the second splicing part 22262 are nested and matched in the form of a male head and a female head, for example.

[0072] In the description of the application, it should be understood that, if there are these terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like, these terms indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, and are only for the purpose of facilitating the description of the application and simplifying the description, and do not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as a limitation on the application.

[0073] In addition, if there are these terms "first", "second", these terms are only for the purpose of description, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Therefore, the features defined as "first", "second" can explicitly or implicitly include at least one of the features. In the description of the application, if the term "multiple" appears, the meaning of "multiple" is at least two, such as two, three, etc., unless otherwise explicitly specified.

[0074] In this application, unless otherwise explicitly specified and limited, if there are terms such as "mounting", "connecting", "connecting", "fixing" and the like, these terms should be broadly understood. For example, it can be fixedly connected, or it can be detachably connected, or it can be integrated; it can be mechanically connected, or it can be electrically connected; it can be directly connected, or it can be indirectly connected through an intermediate medium; it can be the internal communication of two elements or the interaction relationship between two elements, unless otherwise explicitly limited. For those skilled in the art, the specific meaning of the above terms in this application can be understood according to the specific circumstances.

[0075] In this application, unless otherwise explicitly specified and limited, if there are similar descriptions such as "first feature on" or "below" the second feature, the meaning can be that the first and second features are in direct contact, or the first and second features are indirectly in contact through an intermediate medium. Moreover, the first feature "above", "above" and "above" the second feature can be that the first feature is directly above or obliquely above the second feature, or only indicates that the horizontal height of the first feature is higher than that of the second feature. The first feature "below", "below" and "below" the second feature can be that the first feature is directly below or obliquely below the second feature, or only indicates that the horizontal height of the first feature is less than that of the second feature.

[0076] It is to be noted that when an element such as a layer, film, or region is referred to as being "on" another element, it can be directly on the other element or intervening elements can also be present. In contrast, when an element is referred to as being "directly on" another element, there are no intervening elements present. It will be understood that, when an element or layer is referred to as being "connected" to or "coupled" to another element or layer, it can be directly connected or coupled or intervening elements can be present. As used herein, the term "and / or" includes any and all combinations of one or more of the associated listed items.

[0077] Various technical features of the above-described embodiments can each be combined in any combination, as can be appreciated by one of ordinary skill in the art. For the sake of brevity, descriptions of all possible combinations are not described, however, all such combinations are contemplated and are within the scope of the present specification.

[0078] The above-described embodiments are merely illustrative for the present application and do not limit the scope of the present application. It should be understood by those skilled in the art that various modifications and improvements can be made to the embodiments without departing from the spirit of the present application. Accordingly, the scope of the present application should be determined by the appended claims rather than the above description.

Claims

1. A partially external thin-film stretching track, characterized in that, The external film stretching track includes: An annular guide rail includes a working section and a return section; the working section is connected to the return section; the working section is used to enter the high-temperature oven from the inlet side and exit from the outlet side of the high-temperature oven; the return section is used to enter the high-temperature oven from the outlet side and exit from the stretching zone or preheating zone of the high-temperature oven, such that the return section penetrates the entire heat-setting zone of the high-temperature oven and is at least partially located outside the preheating zone of the high-temperature oven, and the return section does not penetrate the entire preheating zone of the high-temperature oven.

2. The partially external film stretching track according to claim 1, characterized in that, At least a portion of the return section passing through the high-temperature oven is parallel to the longitudinal direction of the high-temperature oven; and / or, the portion of the return section passing through the high-temperature oven is arranged close to the inner wall of the high-temperature oven.

3. The partially external film stretching track according to claim 2, characterized in that, The return section includes a first connecting section, an internal section, and a second connecting section; the first connecting section, the internal section, and the second connecting section are connected sequentially along the return direction of the return section; the first connecting section is connected to the tail end of the working section, the internal section is inserted into the high-temperature oven, and the second connecting section is connected to the head end of the working section; the first connecting section and the internal section are set at an obtuse angle, the internal section is parallel to the longitudinal direction of the high-temperature oven, and the internal section and the second connecting section are set at an obtuse angle. Alternatively, the return segment can be set as a straight line.

4. The partially external film stretching track according to claim 3, characterized in that, The return segment further includes a first transition segment and a second transition segment; the first transition segment connects the first connecting segment and the built-in segment, and the second transition segment connects the built-in segment and the second connecting segment.

5. The partially external film stretching track according to claim 1, characterized in that, The external film stretching track further includes a first chain disk and a second chain disk. The first chain disk is located on the inlet side of the high-temperature oven, and the second chain disk is located on the outlet side of the high-temperature oven. The first end of the return section is tangent to the second chain disk, and the tail end of the return section is tangent to the first chain disk.

6. The partially external film stretching track according to any one of claims 1 to 5, characterized in that, The externally mounted film stretching track also includes a enclosure, which surrounds the return section and extends along the length of the return section; a cooling channel is formed between the enclosure and the return section; The enclosure is provided with an air inlet at one end near the entrance of the high-temperature oven. The enclosure passes through the high-temperature oven along with the return section and extends outward from the stretching zone or preheating zone of the high-temperature oven. The part of the enclosure that extends out of the high-temperature oven is provided with an air outlet. The air inlet is used to communicate with the blower.

7. A drying oven apparatus, characterized in that, It includes a high-temperature oven and two partially external film stretching tracks as described in any one of claims 1 to 6; the two partially external film stretching tracks are arranged laterally at intervals; the working section enters the high-temperature oven from the inlet side and exits from the outlet side of the high-temperature oven; the return section enters the high-temperature oven from the outlet side and exits from the stretching zone or preheating zone of the high-temperature oven.

8. The drying oven apparatus according to claim 7, characterized in that, The high-temperature oven includes a support unit; the partially external film stretching track also includes a first track beam and a second track beam; both the first track beam and the second track beam are installed on the support unit; the working section is connected to the first track beam, and the return section is connected to the second track beam.

9. The drying oven apparatus according to claim 8, characterized in that, The support unit includes: Two columns are arranged at a horizontal interval and are used to fix the column to the ground or tabletop; The support beam is connected to the two columns one-to-one at its two opposite ends along the lateral direction; and when the support beam expands and contracts with heat, the ends of the support beam can move relative to the corresponding columns along the lateral direction. A support member, connected between the support beam and the second track beam, the support member being connected to the second track beam, and the support member being slidably disposed on the support beam laterally; and The limiting member is fixedly connected to the column, and is also fixedly connected to at least one of the support member and the second track beam.

10. The drying oven apparatus according to claim 9, characterized in that, The support member includes two first support plates; the two first support plates are arranged at intervals and are respectively located on opposite sides of the support beam along the longitudinal direction, and the first support plates are provided with rollers; the support beam is provided with slide rails extending laterally on opposite sides along the longitudinal direction, and the rollers are slidably engaged with the slide rails; The support component further includes a second support plate, and the two first support plates are connected by the second support plate; The second track beam includes two separate parts corresponding to the support member, and the two separate parts are arranged sequentially along the longitudinal direction; one of the separate parts is fixedly connected to the support member, and the other separate part is slidably engaged with the support member along the longitudinal direction; The return section is equipped with telescopic pairs.

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