Film stretching oven with segmented thermal expansion compensation and oven frame

Abstract

The application relates to a film stretching oven and an oven frame with segmented thermal expansion compensation. The oven frame comprises at least two support units. The support unit comprises two support columns and a first beam body. The bottom end of the support column is fixedly connected to a first supporting piece. The middle part of the first beam body in the transverse direction is provided with a fixing point. The fixing point is fixedly connected to a second supporting piece. The opposite ends of the first beam body in the transverse direction are correspondingly nested with the two support columns, and the end of the first beam body is slidably matched with the corresponding support column in the transverse direction and is limitingly matched with the corresponding support column in the longitudinal direction. The film stretching oven and the oven frame with segmented thermal expansion compensation can limit the size change of the first beam body in the transverse direction which symmetrically extends to both sides of the fixing point in the heated environment, the stretching track supported above both sides of the first beam body can symmetrically, synchronously and orderly produce transverse displacement along the line, the thermal deformation defect of the oven body can be reduced, and the sealing property and the operation precision can be ensured.

Description

Technical Field

[0001] This application relates to the field of film stretching technology, and in particular to a segmented thermal expansion compensated film stretching oven and oven frame. Background Technology

[0002] Film stretching ovens are used to provide suitable processing conditions for polymer films, performing preheating, stretching, shaping, and cooling processes at high temperatures. Common film stretching ovens are typically 40m to 60m in length, with processing temperatures ranging from 120℃ to 280℃, and some high-temperature films reaching up to 350℃.

[0003] The film stretching oven includes an oven frame and an insulation panel. The oven frame primarily provides support, while the insulation panel, located on the exterior of the oven frame, provides thermal insulation. Film channel inlets and outlets are located at the front and rear of the oven frame, forming the film stretching equipment together with the hot air system and track system. A fixed anchor point is located at the geometric center of the bottom surface of the oven frame, serving a positioning function.

[0004] When the film stretching oven is running, each oven unit reaches a high temperature adapted to the process temperature. The oven frame expands due to heat, and the bottom of the oven frame moves longitudinally and laterally around the fixed anchor point to adapt to the changes in the overall thermal expansion dimensions. However, after a period of use, the film stretching oven is prone to defects such as heat deformation and reduced sealing. Summary of the Invention

[0005] Therefore, it is necessary to provide a segmented thermal expansion compensation film stretching oven and oven frame to address the shortcomings of existing technologies. This can reduce thermal deformation defects in the oven body and ensure sealing and the running accuracy of the stretching track.

[0006] On the one hand, this application provides an oven frame, the oven frame comprising: at least two support units, all of which are arranged sequentially at intervals along the longitudinal direction;

[0007] The support unit includes:

[0008] Two support columns are arranged laterally at intervals, and the bottom ends of the support columns are used for fixed connection to the first support member; and

[0009] The first beam has a fixing point at its middle part along the transverse direction. The fixing point is used to fix and connect to the second support member. The two opposite ends of the first beam along the transverse direction are nested with the two support columns one by one. The ends of the first beam are longitudinally limited and matched with the corresponding support columns, and can slide and match along the transverse direction when deformed by heat.

[0010] In one embodiment, the bottom end of the support column is provided with a support plate, the support plate is fixedly connected to the first support member, and the first beam overlaps the support plate and can move laterally relative to the support plate when deformed by heat.

[0011] In one embodiment, the support unit further includes a second beam and a tension rail; the second beam is nested with the two support columns at opposite ends along the lateral direction, and the ends of the second beam are longitudinally limited to the corresponding support columns and can slide laterally when deformed by heat; the second beam is located above the first beam and spaced apart from the first beam, and the tension rail is disposed between the first beam and the second beam, and the tension rail is connected to the first beam or the second beam.

[0012] In one embodiment, both of the two support columns have grooves on their sides facing each other, the grooves extending to the top of the support columns and forming an opening at the top of the support columns, the opening communicating with the grooves; the ends of the first beam and the second beam can be inserted into the grooves through the openings.

[0013] In one embodiment, the support unit further includes a limiting member located above the first beam and engaging with the first beam in a vertical direction. The limiting member is disposed within the groove and is detachably connected to the support column.

[0014] In one embodiment, the support unit further includes a third support member located below the second beam and used to support the second beam. The third support member is disposed in the groove and detachably connected to the support column.

[0015] In one embodiment, the inner wall of the groove is provided with a support block, which is located below the third support and is used to support the third support.

[0016] In one embodiment, the oven frame satisfies at least one of the following conditions:

[0017] (1) The opposite sidewalls of the groove are provided with flanges, and the two flanges are arranged away from each other;

[0018] (2) The support unit further includes two adjusting members, which are connected to the opposite sides of the groove one by one. The adjusting members are adjustablely positioned on the support column, and the two adjusting members abut against the opposite sides of the second beam one by one.

[0019] (3) The area between the end of the first beam and the fixed point is provided with a gap space between it and the ground.

[0020] On the other hand, this application also provides a segmented thermal expansion compensated film stretching oven, including the oven frame.

[0021] In one embodiment, the segmented thermal expansion compensated film stretching oven further includes heat insulation plates, which are connected to the bottom of the oven frame and to opposite sides along the lateral direction.

[0022] The aforementioned segmented thermal expansion compensated film stretching oven and oven frame include at least two support units. Each support unit has two support columns fixed to a first support member. The middle portion of the first beam is fixed to a second support member via a fixing point. The ends of the first beam are longitudinally limited to the corresponding support columns, meaning each support unit is positioned longitudinally. During heating, none of the support units will deform or shift longitudinally. Furthermore, the two opposite ends of the first beam are nested one-to-one with the two support columns, and the ends of the first beam slide laterally with the corresponding support columns. During heating, the opposite ends of the first beam can slide relative to the support columns in a direction away from each other. Therefore, the dimensional changes of the first beam under heating are limited to symmetrical lateral extension from a fixed point to both sides. The stretching tracks supporting it on both sides generate symmetrical, synchronous, orderly, and controllable lateral displacement along the line. This avoids the adverse effects of irregular displacement of the oven frame on the running accuracy of the stretching tracks in related technologies, reduces thermal deformation defects in the oven body, and ensures sealing and the running accuracy of the stretching tracks. Attached Figure Description

[0023] Figure 1 This is a structural diagram of a segmented thermal expansion compensation film stretching oven according to an embodiment of this application.

[0024] Figure 2 for Figure 1 Enlarged structural diagram at point A.

[0025] Figure 3 for Figure 2 Sectional view of the structure at BB.

[0026] Figure 4 This is a structural diagram of two support units in an oven frame according to an embodiment of this application.

[0027] Figure 5 for Figure 4 Enlarged structural diagram at point C.

[0028] Figure 6 for Figure 4 The diagram shows the structure of the support columns in the oven frame.

[0029] Figure 7 for Figure 6 Enlarged structural diagram at point D.

[0030] Explanation of reference numerals in the attached figures:

[0031] 10. Oven frame; 11. Support unit; 111. Support column; 1111. Groove; 1112. Support block; 1113. Flanged edge; 1114. Opening; 112. First beam; 1121. Fixing point; 1122. Crossbeam; 1123. Connecting beam; 1124. Spacing space; 113. Movable space; 114. Support plate; 115. Second beam; 116. Tensioning track; 117. Limiting component; 1171. Second fastener; 118. Third support component; 1181. Third fastener; 119. Adjusting component; 20. Heat insulation board; 30. Film; X, longitudinal direction; Y, transverse direction. Detailed Implementation

[0032] To make the above-mentioned objectives, features, and advantages of this application more apparent and understandable, the specific embodiments of this application are described in detail below with reference to the accompanying drawings. Many specific details are set forth in the following description to provide a thorough understanding of this application. However, this application can be implemented in many other ways different from those described herein, and those skilled in the art can make similar modifications without departing from the spirit of this application. Therefore, this application is not limited to the specific embodiments disclosed below.

[0033] As described in the background section, thin-film stretching ovens in related technologies are prone to thermal deformation and reduced sealing performance after a period of use. This is because, apart from the fixed anchor points, the contact position between the oven frame's support legs and the corresponding support plates can change with each heating cycle or temperature fluctuation of the oven unit, exhibiting a degree of randomness. The extent of this change is proportional to the distance of that position relative to the anchor point. Consequently, after a period of use, minute changes in the reference surface, operating load, or translational friction coefficient often lead to uneven thermal expansion between the oven frame and its support legs, resulting in thermal deformation of the oven frame and reduced sealing performance. Furthermore, since the oven frame supports the stretching track, thermal deformation of the oven frame negatively impacts the running accuracy of the stretching track.

[0034] Based on the above reasons, this application provides a segmented thermal expansion compensation film stretching oven and oven frame, which can reduce the thermal deformation defects of the oven body and ensure the sealing performance and the running accuracy of the stretching track.

[0035] It should be noted that in this embodiment, "lateral" refers to the width direction of the film, that is, as shown in the figure. Figure 1 The direction indicated by the arrow Y; the longitudinal direction refers to the length of the film, or the direction of movement of the film, that is, as shown in the image. Figure 1The direction indicated by the arrow X in the diagram.

[0036] The following will combine Figures 1 to 7 The structure of the oven frame provided in one embodiment of this application will be described in detail.

[0037] Please see Figure 1 and Figure 4 , Figure 1 A structural diagram of a segmented thermal expansion compensation film stretching oven according to an embodiment of this application is shown. Figure 4 This diagram illustrates the structure of two support units 11 in an oven frame 10 according to an embodiment of this application. An embodiment of this application provides an oven frame 10, which includes at least two support units 11. All support units 11 are arranged sequentially at intervals along the longitudinal direction X. Optionally, any two adjacent support units 11 cooperate to form an oven unit. Each oven unit can provide a relatively independent temperature environment for the film 30, and the process temperature of each oven unit can be flexibly adjusted and set according to actual needs.

[0038] Please see Figures 4 to 6 For example, the support unit 11 includes two support columns 111. The two support columns 111 are arranged at a distance of Y in the transverse direction, and the bottom end of the support column 111 is used to fix it to the first support member. The first support member includes, but is not limited to, a support plate or foundation fixed to the ground, etc., which can serve to fix and support the support columns 111, and is not specifically limited here.

[0039] Please see Figure 4 For example, the support unit 11 also includes a first beam 112. A fixing point 1121 is provided at the middle of the first beam 112 along the transverse Y direction. The fixing point 1121 includes, but is not limited to, anchor points. The fixing point 1121 is specifically located at the center of the first beam 112 along the transverse Y direction, but this is not a limitation; it can also be located at various other positions on the bottom surface of the first beam 112 according to actual needs. The fixing point 1121 is used for fixed connection to the second support member. The specific structural form of the second support member is similar to that of the first support member, as long as it serves to fix and support the first beam 112; no specific limitation is made here. The second support member and the first support member can be set independently or integrated.

[0040] In this configuration, the first beam 112 is nested one-to-one with two supporting columns 111 at its opposite ends along the transverse Y-axis. That is, the end of the first beam 112 is either fitted over the corresponding supporting column 111, or the end of the first beam 112 is fitted inside the corresponding supporting column 111. (See also...) Figure 4 and Figure 5 In this embodiment, the example of the end of the first beam 112 being fitted into the corresponding support column 111 is taken, but it is not limited thereto.

[0041] See Figures 3 to 5 The end of the first beam 112 is longitudinally limited and fitted with the corresponding support column 111 along the X direction, and can slide along the Y direction during thermal deformation. For example, a movable gap 113 is provided between the end of the first beam 112 and the support column 111 along the Y direction. This movable gap 113 provides sliding space along the Y direction for the first beam 112 during thermal deformation. The specific size of the movable gap 113 along the Y direction can be flexibly adjusted and set according to actual needs, as long as it is sufficient to absorb the thermal expansion of the first beam 112; no restrictions are imposed here.

[0042] The oven frame 10 described above includes at least two support units 11. The two support columns 111 of each support unit 11 are fixed to the first support member. The middle part of the first beam 112 is fixed to the second support member through the fixing point 1121. The end of the first beam 112 is limited to the corresponding support column 111 along the longitudinal direction X. That is, each support unit 11 is positioned along the longitudinal direction X. During the heating process, each support unit 11 will not deform or shift along the longitudinal direction X. In addition, the two ends of the first beam 112 along the transverse direction Y are nested with the two support columns 111 in a one-to-one correspondence. The end of the first beam 112 is slidably engaged with the corresponding support column 111 along the transverse direction Y. During the heating process, the two ends of the first beam 112 can slide relative to the support column 111 in a direction away from each other. Therefore, it can be seen that the first beam 112 is limited to dimensional changes in a symmetrical lateral Y-shape extending to both sides with the fixed point 1121 as the center under heat. The tension rails 116 supported on both sides of the beam 112 generate lateral Y-shape displacement symmetrically, synchronously, orderly and controllably along the line. This avoids the adverse effects of the irregular displacement of the oven frame 10 on the running accuracy of the tension rails 116 in related technologies, and can reduce the thermal deformation defects of the box body, ensuring the sealing performance and the running accuracy of the tension rails 116.

[0043] In addition, the entire oven frame 10 in the related technology is divided into oven units with several functional areas from a single fixed point 1121, thereby avoiding large-scale superimposed thermal deformation displacement of the frame far from the central anchor point.

[0044] Please see Figure 3 , Figure 4 and Figure 6For example, the bottom end of the support column 111 is provided with a support plate 114. The support plate 114 is fixedly connected to the first support member, thereby improving the installation stability of the support column 111 on the first support member. Furthermore, the first beam 112 overlaps the support plate 114 and can move relative to the support plate 114 in the transverse Y direction when subjected to thermal deformation. The support plate 114 provides stable support for the first beam 112, so that the opposite ends of the first beam 112 extend symmetrically in the transverse Y direction when subjected to thermal deformation. Thus, the innovative design of one-point positioning and three-point support for the first beam 112 ensures that the dimensional changes of the first beam 112 under heated conditions are limited to symmetrical transverse Y-axis extension centered on the fixed point 1121. The tension rails 116 supporting it on both sides can generate symmetrical, synchronous, orderly and controllable transverse Y-axis displacement along the line, avoiding the adverse effects of irregular displacement of the oven frame 10 on the running accuracy of the tension rails 116 in related technologies, and reducing thermal deformation defects of the oven body, ensuring sealing performance and the running accuracy of the tension rails 116.

[0045] The bottom end of the support column 111 is welded to the support plate 114 or fixed by a first fastener such as a pin, rivet, or screw, which is not limited here. In addition, in order to improve the connection stability between the support column 111 and the support plate 114, reinforcing ribs may be provided between the support column 111 and the support plate 114.

[0046] The specific structural form of the first beam 112 can vary, as long as it can provide stable support for the tension rail 116. For an example, please refer to [link / reference needed]. Figure 4 The first beam 112 includes two crossbeams 1122 and multiple connecting beams 1123. The two crossbeams 1122 are arranged side by side at intervals along the longitudinal direction X, and the multiple connecting beams 1123 are connected between the two crossbeams 1122. The opposite ends of the connecting beams 1123 are respectively connected to the two crossbeams 1122, and the connecting beams 1123 and the crossbeams 1122 are set at an angle, such as 30°, 45°, 60°, 90°, 120°, 135°, 150°, etc.

[0047] Please see Figures 2 to 5 For example, the support unit 11 further includes a second beam 115. The second beam 115 is nested with two support columns 111 at opposite ends along the transverse Y direction, and the ends of the second beam 115 are longitudinally limited to the corresponding support columns 111 along the longitudinal X direction, while also being able to slide along the transverse Y direction during thermal deformation. The second beam 115's dimensional variation along the transverse Y direction is symmetrically controlled under heated conditions, reducing thermal deformation defects in the housing and ensuring airtightness.

[0048] The second beam 115 is located above and spaced apart from the first beam 112. The second beam 115 includes, but is not limited to, a baffle plate. The second beam 115 is mainly used to isolate adjacent oven units along the longitudinal direction X, reducing the interference of hot airflow between adjacent oven units and enabling more precise control of the process temperature of each oven unit.

[0049] Please see Figure 1 and Figure 4 For example, the support unit 11 also includes a stretching rail 116. Two stretching rails 116 are arranged at intervals. The stretching rails 116 are positioned between the first beam 112 and the second beam 115, and are connected to either the first beam 112 or the second beam 115. The first beam 112 or the second beam 115 provides stable support for the stretching rails 116. The two stretching rails 116 are used to clamp the film 30 on opposite sides along the transverse Y direction, driving the film 30 through each oven unit sequentially to complete various process steps such as preheating, stretching, heat setting, and cooling.

[0050] Specifically, the tension track 116 includes a track beam, a guide rail, and a chain clamp. The track beam is connected to either a first beam 112 or a second beam 115. Specifically, the track beam is installed on the first beam 112, which stably supports the track beam located above it. The track beam is connected to the guide rail to support it. The chain clamp is mounted on the guide rail and reciprocates under its guidance.

[0051] Please see Figures 3 to 7 For example, each of the two support columns 111 has a groove 1111 on one side facing each other. The groove 1111 extends to the top of the support column 111 and forms an opening 1114 at the top of the support column 111, which communicates with the groove 1111. The ends of the first beam 112 and the second beam 115 can be inserted into the groove 1111 through the opening 1114. In this way, when assembling the oven frame 10, each support column 111 can be installed and fixed to the first support member first, and then the first beam 112 and the second beam 115 can be inserted into the groove 1111 through the opening 1114 in sequence, so that the first beam 112 is connected and fixed to the second support member through the fixing point 1121, thereby facilitating the assembly operation and improving the assembly efficiency of the oven frame 10.

[0052] Please see Figures 3 to 7For example, the support unit 11 also includes a limiting member 117. The limiting member 117 is located above the first beam 112 and engages with the first beam 112 in a vertically limiting manner. Thus, after the first beam 112 is inserted into the groove 1111, the limiting member 117 is installed on the support column 111. The limiting member 117 abuts against the first beam 112 in a vertical direction, preventing the first beam 112 from moving vertically. Furthermore, the connection between the limiting member 117 and the support column 111 forms a rigid body, increasing the structural strength and stability of the support column 111. Specifically, the limiting member 117 is disposed within the groove 1111 and detachably connected to the support column 111. The limiting member 117 may include, but is not limited to, a limiting plate. Optionally, the limiting member 117 is connected to the support column 111 by a second fastener 1171 such as a screw, pin, or rivet.

[0053] For example, the support unit 11 also includes a third support member 118. The third support member 118 is located below the second beam 115 and is used to support the second beam 115. The third support member 118 is disposed in the groove 1111 and is detachably connected to the support column 111. Under the stable support of the third support member 118, the second beam 115 can adaptively expand and contract in the transverse Y direction when it expands and deforms due to heat. In order to avoid the third support member 118 interfering with the assembly of the first beam 112 and the limiting member 117 in the groove 1111, the first beam 112 and the limiting member 117 can be installed into the groove 1111 in sequence first; and after the first beam 112 and the limiting member 117 are both installed in the groove 1111 of the support column 111, the third support member 118 and the second beam 115 are installed into the groove 1111 in sequence. The third support member 118 is located below the second beam 115, serving to support the second beam 115, thereby ensuring that the two opposite ends of the second beam 115 are stably supported by two support units 11. Furthermore, the second beam 115 and the first beam 112 maintain a predetermined vertical distance. The connection between the third support member 118 and the support column 111 forms a rigid body, increasing the structural strength and stability of the support column 111.

[0054] Optionally, the third support member 118 abuts against the inner walls of the opposite sides of the groove 1111 on opposite sides along the longitudinal direction X. That is, the width of the third support member 118 is the same as the distance between the inner walls of the opposite sides of the groove 1111. Furthermore, the third support member 118 is connected to the support column 111 by third fasteners 1181 such as screws, pins, and rivets.

[0055] For example, the inner wall of the groove 1111 is provided with a support block 1112, which is located below the third support member 118 and is used to support the third support member 118. Optionally, the support block 1112 is fixed to the support column 111 by various methods including but not limited to welding, bonding, snap-fitting, riveting, etc. Under the support of the support block 1112, the installation stability of the third support member 118 on the support column 111 is improved.

[0056] Specifically, two support blocks 1112 are provided, arranged side by side with a gap between them, and the two support blocks 1112 together support the third support member 118. The gap between the two support blocks 1112 is greater than the thickness of the first beam 112. During the assembly process, the first beam 112 can pass through the gap between the two support blocks 1112 to reach the preset position and be fully assembled, avoiding interference with the support blocks 1112.

[0057] It should be noted that the "support block 1112" in this embodiment can be a part of the "support column 111", that is, the "support block 1112" and the "other parts of the support column 111" are integrally formed; or it can be an independent component that can be separated from the "other parts of the support column 111", that is, the "support block 1112" can be manufactured independently and then combined with the "other parts of the support column 111" to form a whole.

[0058] In some embodiments, the support block 1112 is welded and fixed to the inner wall of the groove 1111. The support block 1112 not only supports the third support member 118, but also increases the rigidity of the support column 111 and improves the support stability because it is connected to the support column 111 as a whole.

[0059] During on-site installation of the oven frame 10, two support columns 111 are first anchored; the first beam 112 is placed from top to bottom through the opening 1114 and through the gap between the two support blocks 1112 into the bottom of the groove 1111, and supported by the support plate 114; the fixing point 1121 in the middle of the first beam 112 is connected and fixed to the second support member; the third support member 118 is installed into the groove 1111, supported by the two support blocks 1112, and connected and fixed to the support column 111; the second beam 115 is placed from top to bottom through the opening 1114 into the groove 1111, and supported by the third support member 118; the limiting member 117 is installed into the groove 1111, so that the limiting member 117 abuts against the first beam 112, and the limiting member 117 is connected and fixed to the support column 111.

[0060] For example, the groove 1111 has flanges 1113 on opposite sidewalls, with the two flanges 1113 facing away from each other. The flanges 1113 can increase the rigidity of the support column 111 and improve its stability.

[0061] Optionally, the support column 111 is Ω-shaped along its vertical cross-sectional profile. The support column 111 has a simple structure, can meet the longitudinal X-limiting requirements of the first beam 112 and the second beam 115, and effectively improves the support stability of the oven frame 10.

[0062] Please see Figure 3 For example, the support unit 11 also includes two adjusting members 119. The adjusting members 119 include, but are not limited to, bolts. The two adjusting members 119 are connected one-to-one with opposite sides of the groove 1111, and the adjusting members 119 are adjustablely positioned on the support column 111. The two adjusting members 119 abut against opposite sides of the second beam 115. Through the cooperative action of the two adjusting members 119, the position of the second beam 115 along the longitudinal direction X can be adjusted.

[0063] Please see Figure 4 For example, the area between the end of the first beam 112 and the fixing point 1121 is provided with a gap 1124 between it and the ground. In this way, the heat of the first beam 112 can be effectively prevented from being transferred to the ground, thus saving energy.

[0064] Please see Figures 1 to 3 In another embodiment, this application also provides a segmented thermal expansion compensated film stretching oven, including the oven frame 10 of any of the above embodiments.

[0065] The above-mentioned segmented thermal expansion compensated film stretching oven, since it includes the oven frame 10 of the above embodiment, the technical effect is brought about by the oven frame 10, and the beneficial effects include the beneficial effects of the oven frame 10, which will not be elaborated here.

[0066] Please see Figures 1 to 3 Based on the aforementioned embodiments, the segmented thermal expansion compensated film stretching oven further includes heat insulation plates 20. Heat insulation plates 20 are connected to the bottom of the oven frame 10 and to opposite sides along the transverse Y direction. The heat insulation plates 20 serve to prevent heat transfer to the outside of the oven.

[0067] In the description of this application, it should be understood that if terms such as "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential" appear, these terms indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this application.

[0068] Furthermore, where the terms "first" and "second" appear, these terms are for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined with "first" or "second" may explicitly or implicitly include at least one of that feature. In the description of this application, where the term "multiple" appears, "multiple" means at least two, such as two, three, etc., unless otherwise explicitly specified.

[0069] In this application, unless otherwise expressly specified and limited, the terms "installation," "connection," "joining," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components, unless otherwise expressly limited. Those skilled in the art can understand the specific meaning of the above terms in this application based on the specific circumstances.

[0070] In this application, unless otherwise expressly specified and limited, the use of descriptions such as "above" or "below" the second feature indicates that the first and second features are in direct contact or indirect contact via an intermediate medium. Furthermore, "above," "on top of," and "over" the second feature can mean that the first feature is directly above or diagonally above the second feature, or simply that the first feature is at a higher horizontal level than the second feature. Similarly, "below," "below," and "under" the second feature can mean that the first feature is directly below or diagonally below the second feature, or simply that the first feature is at a lower horizontal level than the second feature.

[0071] It should be noted that if an element is referred to as being "fixed to" or "set on" another element, it can be directly on the other element or there may be an intervening element. If an element is considered to be "connected to" another element, it can be directly connected to the other element or there may be an intervening element. If so, the terms "vertical," "horizontal," "upper," "lower," "left," "right," and similar expressions used in this application are for illustrative purposes only and do not represent the only possible implementation.

[0072] The technical features of the above embodiments can be combined in any way. For the sake of brevity, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0073] The embodiments described above are merely illustrative of several implementation methods of this application, and while the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of the patent application. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of this application, and these all fall within the protection scope of this application. Therefore, the protection scope of this patent application should be determined by the appended claims.

Claims

1. An oven frame, characterized in that, The oven frame includes at least two support units, all of which are arranged at intervals along the longitudinal direction. The support unit includes: Two support columns are arranged laterally at a distance, and the bottom end of each support column is fixedly connected to a first support member. Each support column has a groove on its side facing each other, the groove extending to the top of the support column and forming an opening at the top of the support column, the opening communicating with the groove. The first beam has a fixing point at its middle part along the transverse direction. The fixing point is used to fix and connect to the second support member. The two opposite ends of the first beam along the transverse direction are nested with the two support columns one by one. The ends of the first beam are longitudinally limited and matched with the corresponding support columns, and can slide and match laterally when deformed by heat. The ends of the first beam can be inserted into the groove through the opening.

2. The oven frame according to claim 1, characterized in that, The bottom end of the support column is provided with a support plate, which is fixedly connected to the first support member. The first beam overlaps the support plate and can move laterally relative to the support plate when it is deformed by heat.

3. The oven frame according to claim 1, characterized in that, The support unit further includes a second beam and a tension rail; the second beam is nested with the two support columns at opposite ends along the lateral direction, and the end of the second beam is longitudinally limited to the corresponding support column and can slide laterally when deformed by heat; the second beam is located above the first beam and spaced apart from the first beam, and the tension rail is located between the first beam and the second beam, and the tension rail is connected to the first beam or the second beam.

4. The oven frame according to claim 3, characterized in that, The end of the second beam can be inserted into the groove through the opening.

5. The oven frame according to claim 4, characterized in that, The support unit also includes a limiting member, which is located above the first beam and engages with the first beam in a vertical direction. The limiting member is disposed in the groove and is detachably connected to the support column.

6. The oven frame according to claim 4, characterized in that, The support unit further includes a third support member, which is located below the second beam and is used to support the second beam. The third support member is disposed in the groove and is detachably connected to the support column.

7. The oven frame according to claim 6, characterized in that, The inner wall of the groove is provided with a support block, which is located below the third support member and is used to support the third support member.

8. The oven frame according to any one of claims 4 to 7, characterized in that, The oven frame must satisfy at least one of the following conditions: (1) The opposite sidewalls of the groove are provided with flanges, and the two flanges are arranged away from each other; (2) The support unit further includes two adjusting members, which are connected to the opposite sides of the groove one by one. The adjusting members are adjustablely positioned on the support column, and the two adjusting members abut against the opposite sides of the second beam one by one. (3) The area between the end of the first beam and the fixed point is provided with a gap space between it and the ground.

9. A segmented thermal expansion compensated film stretching oven, characterized in that, Includes the oven frame as described in any one of claims 1 to 8.

10. The segmented thermal expansion compensated film stretching oven according to claim 9, characterized in that, The segmented thermal expansion compensated film stretching oven also includes heat insulation plates, which are connected to the bottom of the oven frame and to opposite sides along the lateral direction.

Images