Manufacturing method of unit component of hollow building panel

Abstract

According to the manufacturing method of the unit components of the hollow building panel, a complete plate is bent and integrally formed to form a symmetrical structure, the unit components can be sequentially arranged in the direction of the cross section, and the unit components are arranged in a staggered mode. According to the hollow building panel, the first bending composite section in the first unit component is sewn and fixed with the first sewing turned edge of the second unit component, and the first panel part and the second panel part are connected by combining the core plate, so that the production efficiency of the hollow building panel can be improved while the mechanical property of the hollow building panel is ensured.

Description

Technical Field

[0001] The invention relates to a building panel technology, in particular to a method for manufacturing a unit component of a hollow building panel. Background Art

[0002] At present, the use of composite materials to form building panels has become one of the important development trends. Existing hollow building panels usually have panels located on two surfaces and a connecting support plate located between the two panels. Since the connecting support plate is located between the two panels and is relatively fixed, a building panel with suitable strength and rigidity can be formed; at the same time, since it has a hollow structure, the weight of the hollow building panel can be greatly reduced.

[0003] Hollow building panels are usually formed by connecting multiple unit components. By changing the number of unit components, the hollow building panel can have a suitable area. The structural shape of the unit components not only affects the mechanical properties of the hollow building panel, but also affects the connection and fixing method between the unit components, thereby affecting the production efficiency of the hollow building panel.

[0004] Therefore, how to improve the production efficiency of hollow building panels while ensuring the mechanical properties of hollow building panels is an important technical problem that needs to be solved by those skilled in the art. Summary of the invention

[0005] To this end, the present invention provides a method for manufacturing a unit component of a hollow building panel. Using the unit component, the hollow building panel can be easily formed, and the production efficiency of the hollow building panel can be improved while ensuring the mechanical properties of the hollow building panel.

[0006] The method for manufacturing a unit component of a hollow building panel provided by the present invention comprises:

[0007] Step S100, forming a symmetrical structure from a complete plate, forming a core substrate in the middle, and forming outwardly inclined connecting substrates on both sides of the core substrate; and forming a first surface substrate and a second surface substrate on the outer sides of the two connecting substrates;

[0008] Step S200, overlapping the inner portion of the first substrate with the outer portion of the connecting substrate on one side to form a first bent composite section, overlapping the inner portion of the second substrate with the outer portion of the connecting substrate on the other side to form a second bent composite section, and making the first bent composite section and the second bent composite section symmetrical, and the widths of both are smaller than the width of the connecting substrate; and simultaneously making the outer portions of the first substrate and the second substrate form a first motherboard and a second motherboard respectively;

[0009] Step S300, bending the first bending composite section and the second bending composite section outwards respectively, that is, bending the outer portions of the two connecting substrates outwards at the same time, so that the inner unbent portions of the two connecting substrates respectively form connecting bending transition plates;

[0010] Step S400, forming a first stitching flange and a second stitching flange on the outer portions of the first motherboard and the second motherboard, and forming a first panel portion and a second panel portion on the inner portions.

[0011] Step S500, bend the two connecting bending transition plates outward respectively, at this time, drive the first panel part, the second panel part, the first sewing flange and the second sewing flange to bend at the same time, so that the two connecting bending transition plates and the core plate substrate are made flat, preferably the two connecting bending transition plates and the core plate substrate are made straight to form a flat plate, and the two connecting bending transition plates and the core plate substrate together form a core plate.

[0012] The above-mentioned unit components formed by bending can be sequentially arranged in the cross-sectional direction, and the first bending compound section in the first unit component is inserted between the first stitching flange and the first panel part of the second unit component; the second bending compound section in the first unit component is inserted between the second stitching flange and the second panel part of the second unit component; and the first bending compound section of the first unit component is kept in close contact with the first stitching flange and the first panel part of the second unit component, and the second bending compound section in the first unit component is kept in close contact with the second stitching flange and the second panel part of the second unit component, so that the adjacent unit components can be stitched and kept fixed, and several unit components are sequentially connected and fixed in the same way to form a hollow building panel of appropriate size. The first bending compound section in the first unit component cooperates with the first stitching flange of the second unit component to conveniently form a hollow building panel; at the same time, the unit components are stitched and fixed by the first bending compound section in the first unit component and the first stitching flange of the second unit component, and then the first panel part and the second panel part are connected in combination with the core plate, so that the production efficiency of the hollow building panel can be improved while ensuring the mechanical properties of the hollow building panel.

[0013] In a further technical solution, after step S300 and before step S400, the method further includes:

[0014] Step S310, bend the inner parts of the first motherboard and the second motherboard to form the first folded accommodating inner concave part and the second folded accommodating inner concave part, and the outer parts form the first pre-panel and the second pre-panel respectively; correspondingly, in the above step S400, the outer parts of the first motherboard and the second motherboard form the first stitched flange and the second stitched flange respectively, and the inner parts form the first panel part and the second panel part respectively, specifically, the outer parts of the first pre-panel and the second pre-panel form the first stitched flange and the second stitched flange respectively, and the inner parts form the first panel part and the second panel part respectively. After the stitching unit is constructed in this way, the stitched flange can be located inside the side of the first panel part and the second panel part, thereby ensuring the flatness of the surface of the hollow building panel and improving the performance of the hollow building panel.

[0015] In a further technical solution, in S310, the bottoms of the first folded accommodating inner concave portion and the second folded accommodating inner concave portion are respectively parallel to the first pre-plate and the second pre-plate, so as to facilitate the subsequent formation of parallel structures and the sewing of unit components.

[0016] In a further technical solution, in step S100, the angle between the connecting substrate and the core substrate is made greater than 90 degrees. In this way, when forming the first bending composite section and the second bending composite section, the connecting substrate can be bent inwards at the same time, which is convenient for mold design.

[0017] In a further technical solution, before step S200, the connecting substrate is made perpendicular to the core substrate, which provides convenience and basis for the subsequent bending of the two connecting bending transition plates outwards respectively, driving the first panel part and the second panel part to bend synchronously, and also facilitates mold design.

[0018] In a further technical solution, in the step S300, the first bent composite section and the second bent composite section are respectively formed with the first motherboard and the second motherboard to form a first acute angle.

[0019] In the preferred technical solution, in step S400, the first sewed flange and the second sewed flange form a second acute angle with the inner end of the first panel portion and the second panel portion, respectively, and the second acute angle is not less than the first acute angle. This makes it easier for the first bent composite section and the second bent composite section to be inserted into the first sewed flange and the second sewed flange, respectively, and facilitates the sew-up between the unit components.

[0020] In a further technical solution, in step S200, the inner parts of the first surface substrate and the second surface substrate are respectively formed into a first outer composite single board and a second outer composite single board, and the outer parts of the two connecting substrates are respectively formed into a first inner composite single board and a second inner composite single board, the first outer composite single board and the first inner composite single board are composited to form a first bent composite section, and the second outer composite single board and the second inner composite single board are composited to form a second bent composite section.

[0021] In a further technical solution, it is characterized in that, in step S500, the first panel portion and the second panel portion are made parallel, or the first panel portion and the second panel portion are made to be inclined outwards respectively, so that the first bending composite section and the second bending composite section can be inserted into the first suture flange and the second suture flange respectively, so as to facilitate the suture between the unit components. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] The invention can be further described more conveniently with reference to the accompanying drawings which illustrate the specific structure of specific embodiments of the invention, wherein corresponding parts are substituted for the whole. It should be noted that other arrangements of the invention are possible, and therefore the particularity of the accompanying drawings should not be understood as merely being able to replace the general description of the invention.

[0023] Figure 1 The present invention provides a cross-sectional structural diagram of a unit component of a hollow building panel.

[0024] Figure 2 For two adjacent Figure 1 The unit components shown correspond to the diagram.

[0025] Figure 3 The figure shows the interlaced state of the bent composite sections and the sewn flanges of two adjacent unit components.

[0026] Figure 4 The diagram illustrates the structure of the two adjacent unit components' bent composite sections and sewn flanges in a fitted state.

[0027] Figure 5 for Figure 4 A part of the structure is enlarged.

[0028] Figure 6 An overall screenshot of a hollow building panel is provided for the present invention.

[0029] Figure 7 The present invention provides a side view of a hollow building panel.

[0030] Figure 8 The present invention provides a flowchart for the method for manufacturing unit components of the hollow building panel provided by the present invention.

[0031] Figures 9-1 to 9-14It is a cross-sectional structural change diagram of the manufacturing method process of the unit component of the hollow building panel. DETAILED DESCRIPTION

[0032] The specific embodiments provided by the present invention are described below. For the purpose of easy understanding, this section first describes the hollow building panel unit component and the hollow building panel, and then describes the manufacturing method of the hollow building panel unit component.

[0033] Those skilled in the art can understand that in this patent, the unit components are formed by rolling metal plates (thin sheet materials such as galvanized steel plates), and their formation process is mainly formed by gradually deforming the metal plates using suitable rolling equipment (including matching molds). The main improved structure is reflected in the transverse structure. Therefore, for the convenience of description and understanding, the directional words in this document are mainly determined based on the cross-sections shown in the corresponding drawings.

[0034] Please refer to Figure 1 , Figure 1 The present invention provides a cross-sectional structure diagram of a unit component of a hollow building panel. The unit component is a long strip, which is formed by bending a plate of predetermined length and width in an appropriate manner. In the embodiment, the plate is a galvanized steel plate with a thickness of 2 mm. The uniqueness of the unit component lies in the cross-sectional structure, which includes a first panel part 10, a second panel part 20 and a core plate 30.

[0035] The two ends of the core plate 30 are connected to the inner ends of the first panel part 10 and the second panel part 20 through the first connecting folding part 40 and the second connecting folding part 50. The connecting folding part is formed by composite plates, and the first connecting folding part 40 and the second connecting folding part 50 respectively include a first bending composite section 41 and a first bending composite section 51 inclined outward.

[0036] The inner end of the first panel portion 10 and the outer end of the second panel portion 20 respectively form a first sewing cuff 11 and a second sewing cuff 21 that are bent inward and inward to form a hook shape.

[0037] The first bending composite section 41 and the first bending composite section 51 correspond to the first sewing flange 11 and the second sewing flange 21 respectively, so that the unit components overlap with each other, thereby facilitating the sewing and fixing of the unit components.

[0038] Please refer to Figure 2 and Figure 3 , Figure 2 For two adjacent Figure 1 The corresponding diagram of the unit components shown in the figure, Figure 3The figure shows the interlaced state of the bent composite sections and the sewn flanges of two adjacent unit components. It can be determined that the above-mentioned unit components formed by bending can be arranged sequentially in the cross-sectional direction, and the first bent composite section 41 in the first unit component is inserted between the first sewn flange 11 of the second unit component and the first panel part 10; the second bent composite section 51 in the first unit component is inserted between the second sewn flange 21 of the second unit component and the second panel part 20.

[0039] Refer to Figure 4 and Figure 5 , Figure 4 The structure of the two adjacent unit components with bent composite sections and sewn flanges is shown. Figure 5 for Figure 4 The enlarged structural diagram of part A in the middle. The first bending compound section 41 of the first unit component is kept in close contact with the first stitching flange 11 and the first panel part 10 of the second unit component, and the second bending compound section 51 in the first unit component is kept in close contact with the second stitching flange 21 and the second panel part 20 of the second unit component, so that the adjacent unit components can be stitched and kept fixed. Several unit components are connected and fixed in sequence in the same way to form a hollow building panel of appropriate size. The first bending compound section 41 in the first unit component cooperates with the first stitching flange 11 of the second unit component to conveniently form a hollow building panel; at the same time, the unit components are stitched and fixed by the first bending compound section 41 in the first unit component and the first stitching flange 11 of the second unit component, and then the first panel part 10 and the second panel part 20 are connected in combination with the core plate 30, which can improve the production efficiency of the hollow building panel while ensuring the mechanical properties of the hollow building panel.

[0040] In this embodiment, when bending to form a unit component, the extension direction of the first panel part 10 and the second panel part 20 can be kept parallel. Before sewing adjacent unit components, the first panel part 10 and the second panel part 20 are first opened outward by a suitable device to form a tapered structure, so that adjacent unit components can be staggered. In this way, the relative positions of the first panel part 10, the second panel part 20 and the core plate 30 can be the same before and after the hollow building panel is sewn, which reduces the stress of the hollow building panel after sew, reduces the deformation of the hollow building panel, and improves the stability of the performance of the hollow building panel mechanism. Of course, when bending to form a unit component, the first panel part 10 and the second panel part 20 can also be extended to both sides. In this way, when sewing the unit component, the tapered structure formed by the first panel part 10 and the second panel part 20 can be used to facilitate the joining between the unit components, thereby providing convenience for sewing and fixing, which can improve the production efficiency of the hollow building panel and reduce the cost of the hollow building panel.

[0041] In this embodiment, the extension direction of the core plate 30 is perpendicular to the extension direction of the first panel part 10. In this way, the supporting function of the core plate 30 can be fully utilized to ensure the rigidity and stability of the hollow building panel in the thickness direction. According to actual needs, the extension direction of the core plate 30 can also be relatively inclined to the extension direction of the first panel part 10 to have higher strength or rigidity in certain specific directions.

[0042] Please refer to Figures 2 to 5 In this embodiment, the first connecting folding edge portion 40 and the second connecting folding edge portion 50 further include a first folding accommodating inner recess 42 and a second folding accommodating inner recess 52 respectively; the first folding accommodating inner recess 42 is connected between the first bending compound section 41 and the first panel section 10, and the second folding accommodating inner recess 52 is connected between the second bending compound section 51 and the second panel section 20; the first folding accommodating inner recess 42 and the second folding accommodating inner recess 52 respectively form a first folding accommodating groove and a second folding accommodating groove to accommodate the stitched folding edge; preferably, the depth of the first folding accommodating groove and the second folding accommodating groove is not less than 4 times the thickness of the sheet material forming the unit component. In this way, the stitched folding edge can be located inside the side of the first panel section 10 and the second panel section 20, thereby ensuring the flatness of the surface of the hollow building panel and improving the performance of the hollow building panel.

[0043] As described above, the above-mentioned unit components are sequentially arranged and sewed together to form the hollow building panel provided by the present invention. Figure 6 and Figure 7 , Figure 6 Provide an overall screenshot of the hollow building panel for the present invention, Figure 7The present invention provides a side view of a hollow building panel. In the hollow building panel, the first bent compound section 41 in the first unit component is inserted between the first stitched flange 11 of the second unit component and the first panel portion 10; the second bent compound section 51 in the first unit component is inserted between the second stitched flange 21 of the second unit component and the second panel portion 20; and the first bent compound section 41 of the first unit component is kept in close contact with the first stitched flange 11 of the second unit component and the first panel portion 10, and the second bent compound section 51 in the first unit component is kept in close contact with the second stitched flange 21 of the second unit component and the second panel portion 20. The hollow building panel is formed by using the unit component, which can produce corresponding technical effects. As described above, in the hollow building panel, the first connecting folding edge portion 40 and the second connecting folding edge portion 50 can further include a first folding accommodating inner recess 42 and a second folding accommodating inner recess 52 respectively; the first folding accommodating inner recess 42 connects the first bending compound section 41 and the first panel section 10, and the second folding accommodating inner recess 52 connects the second bending compound section 51 and the second panel section 20; the first folding accommodating inner recess 42 and the second folding accommodating inner recess 52 respectively form a first folding accommodating groove and a second folding accommodating groove to accommodate the stitching folding edge. The flatness of the surface of the hollow building panel can also be improved. At the same time, the first stitched flange 11 in the first unit component can be inserted between the first bending compound section 41 and the first folding accommodating inner recess 42 of the second unit component; the second stitched flange 21 in the first unit component can be inserted between the second bending compound section 51 and the second folding accommodating inner recess 52 of the second unit component; and the first stitched flange 11 in the first unit component is kept in close contact with the first bending compound section 41 and the first folding accommodating inner recess 42 of the second unit component; the second stitched flange 21 in the first unit component is kept in close contact with the second bending compound section 51 and the second folding accommodating inner recess 52 of the second unit component. In this way, the reliability of stitching connection and fixation between unit components can be improved, and the rigidity of the hollow building panel can be improved.

[0044] Refer to Figure 1 In one embodiment of the present invention, the first panel portion 10 and the second panel portion 20 are symmetrically arranged. This ensures that the hollow building panel is flat and avoids deflection. The cross-sectional width W1 of the first panel portion 10 is 1.3 to 1.9 times the cross-sectional width W2 of the core panel 30. This ensures the supporting function of the panel portion of the core panel 30, thereby ensuring the strength of the hollow building panel. At the same time, the cross-sectional width W3 of the first stitched flange 11 and the second stitched flange 21 are both greater than one tenth of the cross-sectional width W1 of the first panel portion 10, thereby ensuring that the unit components have a suitable connection size, thereby ensuring the reliability of the connection between the unit components in the hollow building panel.

[0045] Hereinafter, the method for manufacturing the unit component of the hollow building panel provided by the present invention will be described.

[0046] Please refer to Figure 8 , Figure 8 The present invention provides a flowchart for the method for manufacturing unit components of the hollow building panel provided by the present invention.

[0047] During the material preparation stage, the galvanized steel sheet can be unrolled to form a flat state, and then supplied to the steel sheet rolling equipment through an existing feeding device. The steel sheet can be bent and deformed by a suitable mold to form a predetermined shape.

[0048] Step S100, a symmetrical structure is formed from a complete plate, a core substrate 30a is formed in the middle, and connecting substrates 28 inclined outward are formed on both sides of the core substrate 30a; the outer sides of the two connecting substrates 28 form the first substrate 7 and the second substrate 17 respectively. For the specific structure, please refer to Figure 9-1 to Figure 9-2 In the step S100, the angle between the connecting substrate 28 and the core substrate 30a can be made greater than 90 degrees by rolling twice or three times. In this way, when forming the first bending composite section 41 and the second bending composite section 51, the connecting substrate 28 can be bent inwards at the same time, which is convenient for mold design.

[0049] Step S200, overlap the inner part of the first substrate 7 with the outer part of the connecting substrate 28 on one side to form a first bending composite section 41, overlap the inner part of the second substrate 17 with the outer part of the connecting substrate 28 on the other side to form a second bending composite section 51, and make the first bending composite section 41 and the second bending composite section 51 symmetrical, and their widths are both smaller than the width of the connecting substrate 28; at the same time, make the outer parts of the first substrate 7 and the second substrate 17 form the first motherboard 8 and the second motherboard 18 respectively. For the specific structure, please refer to Figure 9-3 to Figure 9-5 . In step S200, the inner parts of the first surface substrate 7 and the second surface substrate 17 can be formed into a first outer composite single board 412 and a second outer composite single board 512 respectively, and the outer parts of the two connecting substrates 28 can be formed into a first inner composite single board 411 and a second inner composite single board 511 respectively, the first outer composite single board 412 and the first inner composite single board 411 are composited to form a first bending composite section 41, and the second outer composite single board 512 and the second inner composite single board 511 are composited to form a second bending composite section 51. Before the step S200, the connecting substrate 28 is made perpendicular to the core substrate 30a. This provides convenience and basis for the subsequent synchronous bending of the first panel part 10 and the second panel part 20 by bending the two connecting bending transition plates 29 outward respectively, and facilitates mold design.

[0050] Step S300, bend the first bending composite section 41 and the second bending composite section 51 outwards respectively, that is, bend the outer parts of the two connecting substrates 28 outwards at the same time, so that the inner unbent parts of the two connecting substrates 28 form connecting bending transition plates 29 respectively. For the specific structure, please refer to Figure 9-6 to Figure 9-7 In the step S300 , the first bending composite section 41 and the second bending composite section 51 form a first acute angle with the first motherboard 8 and the second motherboard 18 , respectively, to provide a basis for the subsequent correspondence with the first stitching flange 11 and the second stitching flange 21 .

[0051] Step S310, bend the inner parts of the first motherboard 8 and the second motherboard 18 to form the first folded accommodating inner recess 42 and the second folded accommodating inner recess 52, and the outer parts respectively form the first pre-panel 9 and the second pre-panel 19. After the stitching unit is constructed in this way, the stitching folding edge can be located inside the side of the first panel part 10 and the second panel part 20, thereby ensuring the flatness of the surface of the hollow building panel and improving the performance of the hollow building panel. The width of the first folded accommodating inner recess 42 and the second folded accommodating inner recess 52 can be respectively larger than the width of the first bending compound section 41 and the second bending compound section 51, so as to facilitate the formation of a suitable mold, and press to form the first folded accommodating inner recess 42 and the second folded accommodating inner recess 52. For the specific structure, please refer to Figure 9-8 In S310, the bottoms of the first folded accommodating inner concave portion 42 and the second folded accommodating inner concave portion 52 are respectively parallel to the first surface pre-plate 9 and the second surface pre-plate 19, so as to facilitate the subsequent formation of parallel structures and the suturing between unit components.

[0052] Step S400, the first and second pre-panels 9 and 19 are formed into first and second sewing flanges 11 and 21 on the outer side, and the first and second panel parts 10 and 20 on the inner side. Figure 9-9 to Figure 9-10 . In the preferred technical solution, in the step S400, the first sewing flange 11 and the second sewing flange 21 are respectively formed with the inner end of the first panel part 10 and the second panel part 20 to form a second acute angle, and the second acute angle is not less than the first acute angle. This can facilitate the insertion of the first bending composite section 41 and the second bending composite section 51 into the corresponding first sewing flange 11 and the second sewing flange 21, respectively, and facilitate the sewing between unit components. If step S310 is omitted, the outer parts of the first motherboard 8 and the second motherboard 18 can be formed into the first and second sewing flanges 11 and 21, respectively, and the inner parts can be formed into the first panel part 10 and the second panel part 20, respectively, and finally a unit component can be formed.

[0053] Step S500, bend the two connecting bending transition plates 29 outwards respectively, so that the two connecting bending transition plates 29 and the core plate substrate 30a are aligned. Preferably, the two connecting bending transition plates 29 and the core plate substrate are aligned to form a flat plate, and the two connecting bending transition plates 29 and the core plate substrate 30a together form the core plate 30. For the specific structure, please refer to Figure 9-11 to Figure 9-14 In this step, the two connecting bending transition plates 29 are bent outwards respectively, driving the first panel portion 10, the second panel portion 20, the first sewing flange 11 and the second sewing flange 21 to bend simultaneously, providing a basis for the final forming.

[0054] The above-mentioned unit components formed in one piece by bending can be arranged sequentially in the cross-sectional direction, and the first bent compound section 41 in the first unit component is inserted between the first stitched flange 11 of the second unit component and the first panel part 10; the second bent compound section 51 in the first unit component is inserted between the second stitched flange 21 of the second unit component and the second panel part 20; and the first bent compound section 41 of the first unit component is kept in close contact with the first stitched flange 11 and the first panel part 10 of the second unit component, and the second bent compound section 51 in the first unit component is kept in close contact with the second stitched flange 21 and the second panel part 20 of the second unit component, so that adjacent unit components can be stitched and kept fixed, and a plurality of unit components are sequentially connected and fixed in the same manner to form a hollow building panel of appropriate size. By cooperating the first bent composite section 41 in the first unit component with the first stitched flange 11 of the second unit component, a hollow building panel can be easily formed; at the same time, the unit components are sewn and fixed by the first bent composite section 41 in the first unit component and the first stitched flange 11 of the second unit component, and then the first panel part 10 and the second panel part 20 are connected in combination with the core board 30, so that the production efficiency of the hollow building panel can be improved while ensuring the mechanical properties of the hollow building panel.

[0055] In a further technical solution, it is characterized in that, in step S500, the first panel portion 10 is parallel to the second panel portion 20, or the first panel portion 10 and the second panel portion 20 are tilted outwards respectively. This makes it convenient to insert the first bent composite section 41 and the second bent composite section 51 into the first suture flange 11 and the second suture flange 21 respectively, so as to facilitate the suture between the unit components.

[0056] Although preferred embodiments of the present invention have been described in the foregoing description, those skilled in the relevant art will appreciate that many changes or modifications may be made in the details of design, construction or operation without departing from the scope of the present invention.

Claims

1. A method for manufacturing a unit component of a hollow building panel, characterized in that: include: Step S100, forming a symmetrical structure from a complete plate, forming a core substrate (30a) in the middle, and forming outwardly inclined connecting substrates (28) on both sides of the core substrate (30a); and forming a first surface substrate (7) and a second surface substrate (17) on the outer sides of the two connecting substrates (28); Step S200, making the inner part of the first surface substrate (7) overlap with the outer part of the one side connecting substrate (28) to form a first bent composite section (41), making the inner part of the second surface substrate (17) overlap with the outer part of the other side connecting substrate (28) to form a second bent composite section (51), and making the first bent composite section (41) and the second bent composite section (51) symmetrical, and the width of each of them is smaller than the width of the connecting substrate (28); at the same time, making the outer parts of the first surface substrate (7) and the second surface substrate (17) form a first motherboard (8) and a second motherboard (18) respectively; Step S300, bending the first bending composite section (41) and the second bending composite section (51) outwards respectively, so that the inner unbent parts of the connecting substrate (28) form connecting bending transition plates (29); Step S400, forming a first stitching flange (11) and a second stitching flange (21) on the outer portions of the first motherboard (8) and the second motherboard (18), and forming a first panel portion (10) and a second panel portion (20) on the inner portions; Step S500, bend the two connecting bending transition plates (29) outwards respectively, so that the two connecting bending transition plates (29) and the core plate substrate (30a), the two connecting bending transition plates (29) and the core plate substrate (30a) together form the core plate (30).

2. The method for manufacturing a unit component of a hollow building panel according to claim 1, characterized in that: After step S300 and before step S400, the method further includes: Step S310, bend the inner parts of the first motherboard (8) and the second motherboard (18) to form a first folded accommodating inner concave portion (42) and a second folded accommodating inner concave portion (52), and the outer parts to form a first pre-panel (9) and a second pre-panel (19), respectively; In step S400, the outer portions of the first motherboard (8) and the second motherboard (18) are respectively formed into a first stitching flange (11) and a second stitching flange (21), and the inner portions are respectively formed into a first panel portion (10) and a second panel portion (20). Specifically, the outer portions of the first pre-panel (9) and the second pre-panel (19) are respectively formed into a first stitching flange (11) and a second stitching flange (21), and the inner portions are respectively formed into a first panel portion (10) and a second panel portion (20).

3. The method for manufacturing a unit component of a hollow building panel according to claim 2, characterized in that: In S310, the bottoms of the first folded accommodating inner recess (42) and the second folded accommodating inner recess (52) are made parallel to the first surface pre-plate (9) and the second surface pre-plate (19), respectively.

4. The method for manufacturing a unit component of a hollow building panel according to claim 1, characterized in that: In the step S100, the angle between the connection substrate (28) and the core substrate (30a) is made greater than 90 degrees.

5. The method for manufacturing a unit component of a hollow building panel according to any one of claims 1 to 4, characterized in that: Before step S200, the connection substrate 28 is made perpendicular to the core substrate (30a).

6. The method for manufacturing a unit component of a hollow building panel according to claim 5, characterized in that: In the step S300, the first bent composite section (41) and the second bent composite section (51) are formed with the first motherboard (8) and the second motherboard (18) respectively to form a first acute angle.

7. The method for manufacturing a unit component of a hollow building panel according to claim 6, characterized in that: In step S400, the first sewing flange (11) and the second sewing flange (21) are formed with the inner end of the first panel portion (10) and the second panel portion (20) respectively to form a second acute angle, and the second acute angle is not less than the first acute angle.

8. The method for manufacturing a unit component of a hollow building panel according to any one of claims 1 to 4, characterized in that: In step S200, the inner parts of the first surface substrate 7 and the second surface substrate (17) are respectively formed into a first outer composite single board (412) and a second outer composite single board (512), and the outer parts of the two connecting substrates (28) are respectively formed into a first inner composite single board (411) and a second inner composite single board (511), the first outer composite single board (412) and the first inner composite single board (411) are composited to form a first bent composite section (41), and the second outer composite single board (512) and the second inner composite single board (511) are composited to form a second bent composite section (51).

9. The method for manufacturing a unit component of a hollow building panel according to any one of claims 1 to 4, characterized in that: In step S500, the first panel portion (10) and the second panel portion (20) are made parallel.

10. The method for manufacturing a unit component of a hollow building panel according to any one of claims 1 to 4, characterized in that: In step S500, the first panel portion (10) and the second panel portion (20) are tilted outwards respectively.

Images