Leveling tool for flexible board base material

Abstract

The utility model relates to a leveling tool for a flexible board base material, which comprises a bearing base plate capable of limiting a working area, and a hot air pretreatment assembly, a slicking assembly and a roller leveling assembly are arranged on the bearing base plate at intervals, the hot air pretreatment assembly is supported on the bearing substrate in a manner of conveying inclined hot ion airflow to the upper surface and the lower surface of a base material belt at the same time; the scraping assembly is arranged on the output side of the hot air pretreatment assembly in the mode that a V-shaped scraping plate suspended above a base material belt scrapes the base material belt conveyed in a directional mode towards the two sides, and the rolling shaft leveling assembly capable of eliminating warping of a belt body in a rolling mode is further arranged on the output side of the scraping assembly. According to the utility model, the unevenness on the base material belt can be effectively improved in a split-flow scraping and elastic rolling manner, so that the processing quality and the yield are improved.

Description

Technical Field

[0001] The utility model relates to the technical field of soft board substrate leveling equipment, in particular to a leveling tool for soft board substrates. Background Art

[0002] Flexible printed circuits (FPCs), also known as soft boards, are highly reliable and flexible printed circuit boards made from polyimide or polyester film. Their high wiring density, light weight, thinness, and flexible bendability and foldability have led to their widespread use in aerospace, military, and other fields. FPCs offer excellent electrical performance, meeting the demands of smaller and higher-density installation designs while also helping to reduce assembly steps and enhance reliability. FPCs can be bent, rolled, and folded freely, withstanding millions of dynamic bends without damaging the wires. They can be arranged arbitrarily to meet spatial layout requirements and moved and extended in three dimensions, achieving integrated component assembly and wire connection. FPCs' ability to bend and deform as needed can significantly reduce the size and weight of electronic products, meeting the needs of the trend toward higher density, miniaturization, and increased reliability.

[0003] During the production of flexible circuit boards, they are prone to unevenness such as wrinkles and indentations. When unevenness occurs, the flexible circuit is prone to problems such as short circuits, short circuits, and line deformation. Selecting a substrate with good flatness is the basis for producing high-quality and high-yield products. Therefore, before patching, the flatness of the patch needs to be ensured. However, the existing production process usually directly supplies the wound substrate strip to the cutting and forming equipment, which usually does not have pre-inspection processing or direct manual simple inspection. It is impossible to level uneven areas such as wrinkles, warping and indentations, which can easily lead to the surface accuracy of the subsequently processed flexible circuit board products being poor, and printed circuit deformation and other defects are very likely to occur, affecting the product yield and quality. In addition, the existing flattening tools cannot effectively eliminate wrinkles and can easily aggravate the extrusion and shaping of wrinkles, resulting in increased wrinkles and making them more difficult to correct. Utility Model Content

[0004] The purpose of the utility model is to provide a flattening tool for flexible board substrates, which can effectively improve the unevenness on the substrate belt by means of diversion scraping and elastic rolling, thereby improving the processing quality and yield rate, so as to solve the problem that the unevenness defects such as wrinkles, warping and indentations on the existing substrate belt during unwinding and output cannot be effectively removed, making it difficult to ensure the subsequent production quality and yield rate.

[0005] The technical solution adopted by the present invention is: a leveling tool for a soft board substrate, comprising a carrier substrate capable of limiting a working area, on which a hot air pretreatment component, a scraping component and a roller leveling component are arranged at intervals, wherein the hot air pretreatment component is supported on the carrier substrate in a manner capable of simultaneously conveying an inclined hot ion airflow to the upper and lower surfaces of the substrate belt; the scraping component is arranged on the output side of the hot air pretreatment component in a manner of scraping the directionally conveyed substrate belt to both sides by means of a V-shaped scraper suspended above the substrate belt, and the roller leveling component capable of eliminating belt warping by rolling is also arranged on the output side of the scraping component.

[0006] According to a preferred embodiment, the scraping assembly includes a V-shaped scraper, a second support frame, a second hydraulic rod and an elastic support member, wherein the second support frame is mounted on the plate body of the supporting substrate, and the top of the second support frame is connected to the second hydraulic rod extending downward, and the axial lower end of the second hydraulic rod is connected to the V-shaped scraper through the elastic support member.

[0007] According to a preferred embodiment, the main body of the V-shaped scraper is connected to the axial lower end of the elastic support member, and a heating strip capable of heating the substrate belt and a V-shaped scraper strip capable of scraping away wrinkles are arranged in parallel on the lower surface of the main body, and a friction pad layer is also provided on the lower surface of the V-shaped scraper strip.

[0008] According to a preferred embodiment, the elastic support member includes an upper top plate, a telescopic guide rod, a positioning spring and a lower bottom plate, wherein the upper top plate is installed on the axial lower end of the second hydraulic rod, and a plurality of the telescopic guide rods are connected at intervals on the lower surface of the upper top plate; the axial lower end of the telescopic guide rod is connected to a lower bottom plate detachably mounted on the top surface of the main board body, and the positioning spring capable of limiting its initial working length is also sleeved on the telescopic guide rod.

[0009] According to a preferred embodiment, the leveling assembly includes an alignment support plate, an offset wheel group, an alignment extrusion wheel group and an adjustable limiting mechanism, wherein the two alignment support plates are supported parallel to each other on the supporting base plate, and the offset wheel group and the alignment extrusion wheel group are inserted between the two alignment support plates, and the adjustable limiting mechanism that can elastically limit the working position of the alignment extrusion wheel group is also installed on the facing plate surfaces of the two alignment support plates.

[0010] According to a preferred embodiment, the staggered wheel set includes two positioning plates mounted on different positioning support plates and a plurality of wheel axles staggeredly inserted on the positioning plates.

[0011] According to a preferred embodiment, the guide vertical groove of the adjustable limit mechanism is embedded in the positioning support plate, and a slider is connected to the sliding rail in the guide vertical groove, and the top surface of the slider is connected to a limit spring that can limit its working position in the guide vertical groove, the end of the limit spring away from the slider is connected to the positioning slide, and the upper surface of the positioning slide is rotatably connected to a screw, and the screw thread is inserted into the top groove end face of the guide vertical groove.

[0012] According to a preferred embodiment, the alignment extrusion wheel group includes a transmission wheel shaft, an elastic lifting wheel shaft, an annular airbag and a rotary drive motor, wherein the transmission wheel shaft and the elastic lifting wheel shaft are arranged parallel to each other between the two alignment support plates, and one end of the transmission wheel shaft passes through the alignment support plate and is transmission-connected to the rotary drive motor installed on the side of the alignment support plate, and the annular airbag capable of elastically pressing the substrate belt is also sleeved on the transmission wheel shaft; the two ends of the elastic lifting wheel shaft are rotatably inserted on the slider.

[0013] According to a preferred embodiment, the hot air pre-treatment assembly includes a first supporting frame supported on the carrier substrate, and a first thermionic fan and a second thermionic fan mounted on the first supporting frame.

[0014] According to a preferred embodiment, both ends of the carrier substrate further support guide rollers capable of guiding the substrate tape.

[0015] The beneficial effects of the utility model are:

[0016] The hot air pretreatment component provided in the present application achieves preheating, static removal, and impurity removal of the substrate strip by outputting directional hot ion wind, thereby improving the subsequent flattening effect and plasticity, and ensuring the cleanliness and quality of the subsequent finished product processing. The scraping component and roller leveling component provided in the present application can level the uneven areas by scraping and squeezing, respectively, so that the mutual cooperation of multiple different leveling methods can improve the leveling efficiency and quality, achieving high-quality and high-efficiency continuous leveling processing, eliminating the labor intensity and error rate of manual inspection, greatly improving the overall processing efficiency, and also avoiding the problem of aggravated wrinkle defects existing in the existing flattening operation, achieving effective correction of wrinkles, and ensuring the quality and flatness of continuous output.

[0017] The V-shaped scraper provided in the present application can remove unevenness defects such as wrinkles, warping, and indentations on the surface of the substrate strip by scraping it in an inclined manner to both sides. The V-shaped scraper can elastically press against the surface of the substrate strip through the interaction of the second hydraulic rod and the elastic support member, thereby ensuring the effectiveness of contact and the scraping strength. It can also buffer in areas with severe unevenness by elastic lifting and lowering, avoiding scratching the substrate strip due to excessive scraping strength, causing excessive deformation and damage to the substrate strip, improving the scraping and leveling effect and self-adjusting ability, ensuring the leveling quality while maintaining the integrity of the substrate strip. The second hydraulic rod can pre-adjust the working height of the V-shaped scraper to adjust the initial downward pressure strength of the V-shaped scraper on the substrate strip, so that the V-shaped scraper can effectively smooth out wrinkles, warping, and indentations in the heated substrate strip. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 This is a schematic structural diagram of a preferred leveling tool for a soft board substrate proposed in the present invention;

[0019] Figure 2 This is a partial structural diagram of a preferred scraping assembly of a leveling tool for a soft board substrate proposed in the present invention;

[0020] Figure 3 This is a bottom view of a preferred V-shaped scraper for leveling a soft board substrate proposed in the present invention;

[0021] Figure 4 It is a partial side view of a roller leveling assembly of a preferred leveling tool for soft board substrates proposed by the present invention.

[0022] Reference Signs List

[0023] 1: Carrier substrate; 2: Hot air pretreatment assembly; 3: Scraping assembly; 4: Roller leveling assembly; 11: Guide roller; 21: First support frame; 22: First thermionic fan; 23: Second thermionic fan; 31: V-shaped scraper; 32: Second support frame; 33: Second hydraulic rod; 34: Elastic support member; 311: Main board; 312: Heating strip; 313: V-shaped scraper; 314: Friction pad; 341: Top plate; 342: Telescopic guide rod; 343: positioning spring; 344: lower base plate; 41: alignment support plate; 42: offset wheel set; 43: alignment extrusion wheel set; 44: adjustable limit mechanism; 421: positioning plate; 422: wheel axle; 431: transmission wheel axle; 432: elastic lifting wheel axle; 433: annular airbag; 434: rotary drive motor; 441: guide vertical slot; 442: slider; 443: limit spring; 444: positioning slide plate; 445: screw. DETAILED DESCRIPTION

[0024] In order to more clearly illustrate the technical solutions in the embodiments of the present application or the prior art, the present application will be briefly introduced below in combination with the drawings and the description of the embodiments or the prior art. Obviously, the following description of the drawings is only some embodiments of the present application, and for those skilled in the art, other drawings can also be obtained from these drawings without creative labor.

[0025] The technical solutions provided by the present application will be described in detail below with reference to the drawings by way of embodiments. It should be noted that the description of these embodiments is used to help understand the present application, but does not constitute a limitation on the present application. In some examples, since some embodiments belong to prior art or conventional technology, they are not described or not described in detail.

[0026] In addition, the technical features described in this paper, or the steps in all the methods or processes disclosed, can be combined in any suitable way in one or more embodiments, except for mutually exclusive features and / or steps. It is easy for those skilled in the art to understand that the order of steps or operations of the methods related to the embodiments provided herein can also be changed. Any order in the drawings and embodiments is only used for illustration and does not imply that it is required to follow a certain order, unless it is explicitly stated that it is required to follow a certain order.

[0027] The serial numbers of the components in this paper, such as "first", "second", etc., are only used to distinguish the described objects, and do not have any order or technical meaning. The "connection" and "coupling" in this application include direct and indirect connection (coupling) under reasonable circumstances (not self-contradictory).

[0028] The following will be described in detail in combination with the drawings.

[0029] Embodiment 1

[0030] The present application provides a leveling tool for soft board substrate, which comprises a bearing substrate 1, a hot air pretreatment assembly 2, a scraping assembly 3 and a roller leveling assembly 4.

[0031] According to Figure 1-4In a specific embodiment shown, the carrier substrate 1 is movably placed in a specific area of ​​the workshop to define a working area. A hot air pretreatment component 2, a scraping component 3 and a roller leveling component 4 are arranged at intervals on the carrier substrate 1. The hot air pretreatment component 2 is supported on the carrier substrate 1 in a manner that can simultaneously deliver an inclined hot ion airflow to the upper and lower surfaces of the suspended substrate belt, thereby completing the cleaning and preheating of the substrate belt, and using the airflow to smooth out wrinkles. The scraping component 3 is arranged on the output side of the hot air pretreatment component 2 in a manner that scrapes the directionally conveyed substrate belt to both sides through a V-shaped scraper 31 suspended above the substrate belt. The output side of the scraping component 3 is also provided with a roller leveling component 4 that can eliminate the warping of the belt body by rolling. The hot air pretreatment component 2 set in this application achieves preheating, static electricity removal and impurity removal of the substrate belt by outputting directional hot ion wind, thereby improving the subsequent leveling effect and plasticity, and ensuring the cleanliness and quality of subsequent finished product processing. The scraping assembly 3 and roller leveling assembly 4 provided in the present application can level the uneven areas by scraping and squeezing respectively, so that the mutual cooperation of multiple different leveling methods can improve the leveling efficiency and quality, realize high-quality and high-efficiency continuous leveling processing, eliminate the labor intensity and error rate of manual inspection, greatly improve the overall processing efficiency, and also avoid the problem of aggravated wrinkle defects existing in the existing flattening operation, realize effective correction of wrinkles, and ensure the quality and flatness of continuous output.

[0032] Preferably, both ends of the carrier substrate 1 also support guide rollers 11 capable of guiding the substrate tape. Preferably, the carrier substrate 1 is also provided with a winding device capable of retracting and unreeling the substrate tape, thereby enabling the release or rewinding of the rolled substrate tape. Further preferably, one side of the carrier substrate 1 is provided with a flexible circuit board production line or production equipment capable of processing the flattened substrate tape into finished products, thereby directly and continuously completing the manufacture of multiple flexible circuit boards. The guide rollers 11 provided in this application utilize a dual-roller structure to facilitate the positioning and guidance of the substrate tape.

[0033] Preferably, the hot air pre-treatment assembly 2 comprises a first support frame 21 supported on the carrying base plate 1, and a first and a second hot ion fan 22 and 23 mounted on the first support frame 21. Preferably, the first and the second hot ion fan 22 and 23 are respectively arranged above and below the substrate strip passing through the frame cavity of the first support frame 21. Specifically, the first support frame 21 is provided with two lifting rod racks above and below the substrate strip passing through the frame cavity thereof, and the first and the second hot ion fan 22 and 23 are respectively mounted on the two lifting rod racks in an inclined manner, so as to blow the substrate strip in an acute angle with the substrate strip to remove impurities on the substrate strip. Specifically, the first and the second hot ion fan 22 and 23 comprise ion fans with heating function in existing products, and the output ends of the fans are connected with strip-shaped exhaust ports, so as to facilitate the air flow width to be greater than or equal to the width of the entire substrate strip. The hot air with ions blown by the ion fan can perform the electrostatic removal operation on the surface of the substrate strip while realizing the preheating of the substrate strip, so as to improve the plasticity of the substrate strip in the subsequent leveling process and improve the shaping effect.

[0034] Preferably, the scraping assembly 3 comprises a V-shaped scraper 31, a second support frame 32, a second hydraulic rod 33 and an elastic support 34. Preferably, the second support frame 32 is mounted on the plate body of the carrying base plate 1. Preferably, the top of the second support frame 32 is connected with the second hydraulic rod 33 extending downward. Further preferably, the axial lower end of the second hydraulic rod 33 is connected with the V-shaped scraper 31 through the elastic support 34, so that the V-shaped scraper 31 is adjustably abutted on the substrate strip. The V-shaped scraper 31 provided in the present application can remove the uneven defects such as wrinkles, warping and indentation on the surface of the substrate strip by tilting to the left and right sides, and the V-shaped scraper 31 can be elastically abutted on the surface of the substrate strip through the cooperation of the second hydraulic rod 33 and the elastic support 34, so as to ensure the effectiveness and scraping strength of the contact, and also can buffer in the serious uneven area through elastic lifting, so as to avoid scratching the substrate strip due to excessive scraping strength, causing excessive deformation and damage of the substrate strip, improving the scraping leveling effect and self-adjusting ability, ensuring the leveling quality while maintaining the integrity of the substrate strip. The second hydraulic rod 33 can pre-adjust the working height of the V-shaped scraper 31 to adjust the initial downward pressure strength of the V-shaped scraper 31 on the substrate strip, so that the V-shaped scraper 31 can effectively scrape the wrinkles, warping and indentation of the heated substrate strip.

[0035] Preferably, the main plate body 311 of the V-shaped scraper 31 is connected to the axial lower end of the elastic support 34. Preferably, a heating strip 312 capable of heating the base material belt and a V-shaped scraping strip 313 capable of scraping the wrinkles are arranged in parallel on the lower surface of the main plate body 311. Preferably, the heating strip 312 is located on the side of the V-shaped scraping strip 313 close to the hot air pretreatment assembly 2. Preferably, a friction pad layer 314 is also arranged on the lower surface of the V-shaped scraping strip 313. Preferably, the friction force between the friction pad layer 314 and the base material belt should be greater than the tension force for flattening the wrinkles of the base material belt, which is less than the tension force for breaking the base material belt, so as to effectively prevent the phenomenon of not being flattened during the process of flattening the wrinkles of the base material belt. Specifically, the friction pad layer 314 can be a non-rigid material such as silica gel material to avoid scratching the base material belt. The heating strip 312 provided in the present application adjusts its heating temperature according to the demand, thereby heating the base material belt which has completed the preheating at a higher temperature, further improving the shaping ability of the base material belt, so as to better force the base material belt to deform during the subsequent scraping and rolling processes to remove the unevenness problem. The V-shaped scraping strip 313 provided in the present application can scrape the uneven defects on the surface of the base material belt by tilting and pushing to both sides during the conveying process of the base material belt, so that the uneven areas of the base material belt are subjected to heating and flattening processing transmitted to both sides, realizing the scraping and flattening processing of self-spreading from the middle to both sides, to complete the continuous flattening processing of the base material belt, avoid the stacking and transmission of wrinkles, and improve the overall flattening efficiency.

[0036] Preferably, the elastic support 34 comprises an upper top plate 341, a telescopic guide rod 342, a positioning spring 343 and a lower bottom plate 344. Preferably, the upper top plate 341 is installed at the axial lower end of the second hydraulic rod 33. Preferably, a plurality of telescopic guide rods 342 are connected to the lower surface of the upper top plate 341 at intervals. Further preferably, the axial lower end of the telescopic guide rod 342 is connected to the lower bottom plate 344 which is detachably installed on the top surface of the main plate body 311. Preferably, the telescopic guide rod 342 is further sleeved with a positioning spring 343 capable of limiting its initial working length. The telescopic guide rod 342 and the positioning spring 343 provided in the present application cooperate to elastically adjust the height of the V-shaped scraper 31, avoiding the damage to the base material belt caused by the hard scraping of the V-shaped scraper 31 when facing larger multiple wrinkles.

[0037] Preferably, the leveling assembly 4 includes an alignment support plate 41, an offset wheel set 42, an alignment extrusion wheel set 43 and an adjustable limiting mechanism 44. Preferably, the two alignment support plates 41 are supported on the carrier substrate 1 in parallel with each other. Preferably, an offset wheel set 42 and an alignment extrusion wheel set 43 parallel to each other are inserted between the two alignment support plates 41. Preferably, an adjustable limiting mechanism 44 capable of elastically limiting the working position of the alignment extrusion wheel set 43 is also installed on the facing surfaces of the two alignment support plates 41. The offset wheel set 42 provided in the present application can construct a serpentine gap to trim the surface of the substrate belt to improve its flatness. The alignment extrusion wheel set 43 provided in the present application further flattens the substrate belt by means of elastic alignment extrusion of the two wheel bodies to ensure that wrinkles and other unevenness can be effectively removed in turn by scraping and alignment pressing, thereby improving the flatness effect and quality. The adjustable limiting mechanism 44 provided in the present application can assist in adjusting the extrusion strength of the alignment extrusion wheel set 43, thereby avoiding the problem that the substrate belt is excessively compressed and deformed, or that the uneven area cannot be trimmed due to insufficient compression.

[0038] Preferably, the staggered wheel assembly 42 comprises two positioning plates 421 mounted in alignment on different alignment support plates 41, and a plurality of wheel axles 422 staggered and inserted into the positioning plates 421. Preferably, the ends of the wheel axles 422 are rotatably inserted into the opposing surfaces of the two positioning plates 421. The staggered arrangement of the multiple wheel axles 422 in this application can define a serpentine gap, thereby improving the trimming effect and quality.

[0039] Preferably, the alignment extrusion wheel assembly 43 includes a transmission shaft 431, an elastic lifting shaft 432, an annular airbag 433, and a rotary drive motor 434. Preferably, the transmission shaft 431 and the elastic lifting shaft 432 are arranged parallel to each other between the two alignment support plates 41. Further preferably, one end of the transmission shaft 431 passes through the alignment support plates 41 and is in transmission connection with the rotary drive motor 434 mounted on the side of the alignment support plates 41. Preferably, the transmission shaft 431 is also sheathed with an annular airbag 433 that can elastically press against the substrate strip. Specifically, both ends of the elastic lifting shaft 432 are rotatably mounted on the slider 442. The transmission wheel shaft 431 provided in the present application can cooperate with the elastic lifting wheel shaft 432 to define a rolling gap with an adjustable gap width, thereby squeezing the substrate belt passing through the rolling gap to improve its flatness. In particular, the annular airbag 433 on the surface of the transmission wheel shaft 431 and the adjustable limiting mechanism 44 for positioning the height of the elastic lifting wheel shaft 432 can cooperate with each other to adaptively adjust the extrusion strength, ensuring the flattening effect while avoiding excessive extrusion that may cause adverse deformation of the substrate.

[0040] Preferably, the guide vertical groove 441 of the adjustable limiting mechanism 44 is embedded in the positioning support plate 41. Further preferably, a slider 442 is connected to the sliding rail in the guide vertical groove 441. Preferably, the top surface of the slider 442 is connected with a limiting spring 443 that can limit its working position in the guide vertical groove 441. Preferably, the end of the limiting spring 443 away from the slider 442 is connected to the positioning slide 444. Preferably, the upper surface of the positioning slide 444 is rotatably connected with a screw 445. Specifically, the screw 445 is threadedly inserted into the top groove end face of the guide vertical groove 441 to adjust the working position of the positioning slide 444 in the guide vertical groove 441, thereby adjusting the initial working position and the difficulty of lifting and lowering of the slider 442.

[0041] The present utility model is not limited to the above-mentioned optional implementation methods. Anyone can derive other forms of products under the inspiration of the present utility model. However, no matter what changes are made in its shape or structure, any technical solution that falls within the scope defined by the claims of the present utility model falls within the protection scope of the present utility model. Those skilled in the art should understand that the present utility model specification and its drawings are illustrative and do not constitute a limitation on the claims. The scope of protection of the present utility model is defined by the claims and their equivalents. Throughout the text, the features guided by "preferably" are only an optional method and should not be understood as having to be set. Therefore, the applicant reserves the right to abandon or delete the relevant preferred features at any time.

Claims

1. A flattening tool for a flexible board substrate, comprising a carrier substrate (1) capable of defining a working area, characterized in that: A hot air pretreatment component (2), a scraping component (3) and a roller leveling component (4) are arranged at intervals on the carrier substrate (1), wherein: The hot air pretreatment assembly (2) is supported on the carrier substrate (1) in a manner capable of simultaneously delivering an inclined hot ion airflow to the upper and lower surfaces of the substrate strip; The scraping assembly (3) is arranged on the output side of the hot air pretreatment assembly (2) in a manner that scrapes the directionally conveyed substrate belt toward both sides through a V-shaped scraper (31) suspended above the substrate belt, and the roller leveling assembly (4) capable of eliminating belt warping by rolling is also arranged on the output side of the scraping assembly (3).

2. The flattening tool for flexible board substrate according to claim 1, characterized in that: The scraping assembly (3) comprises a V-shaped scraper (31), a second support frame (32), a second hydraulic rod (33) and an elastic support member (34), wherein: The second support frame (32) is mounted on the plate body of the supporting substrate (1), and the top of the second support frame (32) is connected to the second hydraulic rod (33) extending downward, and the axial lower end of the second hydraulic rod (33) is connected to the V-shaped scraper (31) through the elastic support member (34).

3. The flattening tool for flexible board substrate according to claim 2, characterized in that: The main body (311) of the V-shaped scraper (31) is connected to the axial lower end of the elastic support member (34), and a heating strip (312) capable of heating the substrate strip and a V-shaped scraper strip (313) capable of scraping away wrinkles are arranged in parallel on the lower surface of the main body (311). A friction pad layer (314) is also provided on the lower surface of the V-shaped scraper strip (313).

4. The flattening tool for flexible board substrate according to claim 3, characterized in that: The elastic support member (34) includes an upper top plate (341), a telescopic guide rod (342), a positioning spring (343) and a lower bottom plate (344), wherein: The upper top plate (341) is installed at the axial lower end of the second hydraulic rod (33), and a plurality of telescopic guide rods (342) are connected to the lower surface of the upper top plate (341) at intervals; The axial lower end of the telescopic guide rod (342) is connected to a lower base plate (344) detachably mounted on the top surface of the main body (311), and the positioning spring (343) capable of limiting its initial working length is also sleeved on the telescopic guide rod (342).

5. The flattening tool for flexible board substrate according to claim 4, characterized in that: The leveling assembly (4) comprises an alignment support plate (41), a staggered wheel set (42), an alignment extrusion wheel set (43) and an adjustable limiting mechanism (44), wherein: The two alignment support plates (41) are supported on the carrier substrate (1) in parallel with each other, and the offset wheel group (42) and the alignment extrusion wheel group (43) are inserted between the two alignment support plates (41). The adjustable limiting mechanism (44) capable of elastically limiting the working position of the alignment extrusion wheel group (43) is also installed on the facing plate surfaces of the two alignment support plates (41).

6. The flattening tool for flexible board substrate according to claim 5, characterized in that: The staggered wheel set (42) comprises two positioning plates (421) mounted on different positioning support plates (41) in an aligning manner and a plurality of wheel axles (422) staggeredly inserted into the positioning plates (421).

7. The flattening tool for flexible board substrate according to claim 6, characterized in that: The guide vertical groove (441) of the adjustable limiting mechanism (44) is embedded in the alignment support plate (41), and a slider (442) is slidably connected in the guide vertical groove (441), and the top surface of the slider (442) is connected to a limiting spring (443) capable of limiting its working position in the guide vertical groove (441). One end of the limit spring (443) away from the slider (442) is connected to the positioning slide (444), and the upper surface of the positioning slide (444) is rotatably connected to a screw (445), and the screw (445) is threadedly inserted into the top groove end surface of the guide vertical groove (441).

8. The flattening tool for flexible board substrate according to claim 7, characterized in that: The counter-extrusion wheel assembly (43) includes a transmission wheel shaft (431), an elastic lifting wheel shaft (432), an annular airbag (433) and a rotation drive motor (434), wherein: The transmission wheel shaft (431) and the elastic lifting wheel shaft (432) are arranged parallel to each other between the two alignment support plates (41), and one end of the transmission wheel shaft (431) passes through the alignment support plate (41) and is connected to the rotation drive motor (434) installed on the side of the alignment support plate (41). The annular airbag (433) capable of elastically pressing the substrate belt is also sleeved on the transmission wheel shaft (431); Both ends of the elastic lifting wheel shaft (432) are rotatably inserted into the slider (442).

9. The flattening tool for flexible board substrate according to claim 8, characterized in that: The hot air pretreatment assembly (2) comprises a first support frame (21) supported on the carrier substrate (1), and a first thermionic fan (22) and a second thermionic fan (23) mounted on the first support frame (21).

10. The flattening tool for flexible board substrate according to claim 9, characterized in that: Both ends of the carrier substrate (1) also support guide rollers (11) capable of guiding the substrate belt.

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