Production method of compression-molded homogeneous plate with built-in keel, homogeneous plate and mold box

Abstract

The invention belongs to the technical field of homogeneous plates, and relates to a production method of a homogeneous plate with built-in keels formed through compression, the homogeneous plate and a mould box, and the production method comprises the following specific steps that S1, the production mould box and the built-in keels are prepared; s2, the built-in keel in the step S1 is placed in a production mold box, and the built-in keel is matched with a keel limiting unit of the production mold box; s3, pouring the dry-state or semi-dry-state concrete into the production mold box, and then pressing a pressing plate of the production mold box on the dry-state or semi-dry-state concrete; and S4, compression molding is conducted, specifically, gradient compression is conducted on the pressing plate in a production mold box through a press machine, then the production mold box is demolded, and the compression-molded built-in keel homogeneous plate is obtained. After the method and the structure are adopted, the built-in keel with the preset structure has the beneficial effects that the bonding area of the built-in keel and concrete is wide, a pressing defect area does not exist, and the strength of each part of a plate is uniform.

Description

Technical Field

[0001] The invention belongs to the technical field of homogeneous plates, and in particular relates to a production method of a press-formed homogeneous plate with a built-in keel, a homogeneous plate and a mold box. Background Art

[0002] Existing homogeneous boards (such as gypsum boards and fiber cement boards) often face the problem of insufficient compressive performance in construction applications, especially when subjected to concentrated loads (such as hanging heavy objects or long-term lateral stress, such as wind pressure in high-rise buildings), local deformation or even cracking is prone to occur. This defect is mainly due to its material properties: the homogeneous board has a homogeneous structure inside and lacks a directionally reinforced mechanical skeleton, resulting in a single stress transfer path and generally low compressive strength. To solve this problem, the "built-in keel strengthening technology" is introduced - light steel keels or composite keels (such as glass fiber reinforced plastics) are embedded in the production process of homogeneous boards to form a "plate-rib composite structure."

[0003] The current strengthening process of built-in keels in homogeneous panels has two core defects, which directly affect the mechanical properties of the composite structure: 1. During the homogeneous panel pressing and forming stage (such as gypsum board rolling and fiber cement board hot pressing), if the unfixed keels are directly pressed together with the raw materials, the keels will be displaced or twisted due to the difference in the rheological properties of the materials; 2. In order to avoid the problem of pressing deformation, some manufacturers use the "post-opening embedding method" - first mechanically slotting / drilling holes on the homogeneous panel, then inserting the keel and fixing it with adhesive. Although this method simplifies the process, it introduces new defects, such as insufficient interface bonding: the homogeneous panel at the edge of the opening forms microcracks due to cutting damage, and the adhesive only covers the contact surface, resulting in low shear strength at the keel-board interface; stress concentration is aggravated, and geometric mutations are formed at the opening, which significantly reduces fatigue life. Summary of the invention

[0004] In order to solve the above problems in the prior art, the present invention provides a production method of a press-formed homogeneous plate with a built-in keel, a homogeneous plate and a mold box.

[0005] To achieve the above object, the present invention adopts the following technical solutions:

[0006] As one aspect of the present invention, a method for producing a press-formed homogeneous plate with a built-in keel is provided, and the specific steps are as follows:

[0007] Step S1, preparing a production mold box and a built-in keel;

[0008] Step S2, placing the built-in keel of step S1 in the production mold box, so that the built-in keel matches the keel limiting unit of the production mold box;

[0009] Step S3, pouring dry or semi-dry concrete into a production mold box, and then pressing a pressing plate of the production mold box onto the dry or semi-dry concrete;

[0010] Step S4, compression molding: Use a press machine to gradiently compress the pressing plate in the production mold box, and then demold the production mold box to obtain a press-molded built-in keel homogeneous plate.

[0011] According to the present invention, the pressure of the gradient pressing in step S4 is set to an initial pressure of 6-8MPa and a terminal pressure of 12-16MPa; after pressing, the production mold box is demolded after standing at room temperature for 8-12 hours to obtain a pressed homogeneous plate with a built-in keel.

[0012] As a second aspect of the present invention, a press-formed homogeneous plate with built-in keel is provided. The homogeneous plate with built-in keel is produced by the production method of the press-formed homogeneous plate with built-in keel described above.

[0013] As a third aspect of the present invention, a production mold box of a method for producing a homogeneous plate with a built-in keel formed by pressing as described above is provided, wherein the production mold box comprises a pressing plate, a mold frame and a bottom bracket, wherein the bottom of the mold frame is detachably arranged on the bottom bracket, and the bottom bracket closes the lower opening of the mold frame; the mold frame and the bottom bracket are connected by a buckle lock; the pressing plate is placed in the mold frame, and the size of the pressing plate matches the inner wall of the mold frame;

[0014] The mold frame is provided with a keel limiting unit for limiting the position of the built-in keel when it is pressed and formed; when the built-in keel is demoulded, the keel limiting unit does not contact the built-in keel.

[0015] According to the present invention, the mold frame is formed by welding four panels end to end in sequence, and the upper end and the lower end of the mold frame are both open.

[0016] According to the present invention, a roller is provided at the bottom of the base.

[0017] According to the present invention, a pressing plate limiting structure is provided on the mold frame, and the pressing plate limiting structure limits the position of the pressing plate in the mold frame.

[0018] According to the present invention, the keel limiting unit includes an ear seat connected to the outer side of the mold frame, and the mold frame is provided with a clearance hole, the clearance hole is located on the side of the ear seat, and the number of the clearance holes is the same as the number of the ear seat; the ear seat is connected to a limiting block through a connecting pin; the limiting block takes the center of the connecting pin as a fulcrum and can rotate relative to the ear seat; the limiting block matches the clearance hole.

[0019] According to the present invention, the limit block includes a block body, a mounting hole is formed on the block body, and the mounting hole is connected to the ear seat through a connecting pin; a support platform for supporting the built-in keel is formed on the block body, and during the pressing process, the support platform is located in the mold frame, and during demolding, the support platform rotates so that the support platform does not contact the built-in keel and the support platform is not in the mold frame; a block arc portion matching the clearance hole is formed on the block body, and the curvature radius of the block arc portion is completely matched with the edge of the clearance hole; a handle portion is formed on the block body.

[0020] According to the present invention, the built-in keel is I-shaped.

[0021] According to the present invention, the built-in keel includes a first keel, the first keel includes a keel body, and the keel body forms a preset angle with the horizontal plane;

[0022] The upper end of the keel body extends to the right to form an upper supporting keel, and the lower end of the keel body extends to the left to form a lower supporting keel;

[0023] Alternatively, the upper end of the keel body extends leftward to form an upper supporting keel, and the lower end of the keel body extends rightward to form a lower supporting keel.

[0024] According to the present invention, the built-in keel also includes a second keel, which is spaced apart from the first keel; the structure of the second keel is the same as that of the first keel; the first keel and the second keel are connected by a connecting piece; when the built-in keel is placed in the mold frame, the connecting piece cooperates with the corresponding support platform.

[0025] The beneficial effects of the production method of the homogeneous plate with built-in keels, the homogeneous plate and the mold box formed by the press molding of the present invention are specifically embodied in that: the built-in keels will not be deformed or displaced in the homogeneous plate, so that the built-in keels can exert the best compressive resistance; the design of the keel limiting unit can make the built-in keels accurately positioned without affecting the demoulding of the built-in keels after molding, and the concrete will not leak out during the press molding process; the built-in keels with a preset structure have a wide bonding area with the concrete, and there is no pressing defect area, so that the strength of the plate is uniform everywhere. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] The drawings in the specification, which constitute a part of this application, are used to provide a further understanding of the present invention. The illustrative embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute improper limitations on the present invention.

[0027] Figure 1 It is a structural schematic diagram of a production mold box of a press-formed homogeneous plate with built-in keel according to the present invention;

[0028] Figure 2It is a bottom view of the structure of the production mold box of the press-formed built-in keel homogeneous plate of the present invention;

[0029] Figure 3 It is a structural cross-sectional view of a production mold box of a press-formed homogeneous plate with a built-in keel according to the present invention;

[0030] Figure 4 It is a structural stereogram of the production mold box of the press-formed homogeneous plate with built-in keel of the present invention after removing the pressing plate;

[0031] Figure 5 It is a partial schematic diagram of the clearance hole and the keel limiting unit of the mold frame of the present invention;

[0032] Figure 6 It is a structural schematic diagram of the keel limiting unit of the present invention;

[0033] Figure 7 This is a diagram showing the matching state of the built-in keel and the keel limiting unit of the present invention;

[0034] Figure 8 It is a structural stereogram of the built-in keel of the present invention;

[0035] Fig. 9 It is a structural cross-sectional view of the built-in keel of the present invention;

[0036] Fig.10 It is a structural cross-sectional view of the keel body of the present invention;

[0037] Fig.11 It is a structural cross-sectional view of the first vertical compression keel and the second vertical compression keel of the present invention. DETAILED DESCRIPTION

[0038] In order to make the purpose, technical solution and advantages of the present invention clearer, the technical solution of the present invention will be clearly and completely described below in conjunction with the specific embodiments of the present invention and the corresponding drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the present invention.

[0039] A method for producing a press-formed homogeneous plate with a built-in keel according to an embodiment of the present application is as follows: Figure 1-Figure 4 As shown, the specific steps are as follows:

[0040] Step S1, preparing a production mold box 1 and a built-in keel 2;

[0041] Step S2, placing the built-in keel 2 of step S1 in the production mold box 1, so that the built-in keel 2 matches the keel limiting unit 17 of the production mold box 1;

[0042] Step S3, pouring dry or semi-dry concrete into the production mold box 1, and then pressing the pressing plate 11 of the production mold box 1 onto the dry or semi-dry concrete;

[0043] Step S4, compression molding: Use a press machine to gradiently compress the pressing plate 11 in the production mold box 1, and then demold the production mold box to obtain a compression-molded homogeneous plate with a built-in keel.

[0044] Furthermore, the pressure of the gradient pressing in step S4 is set to an initial pressure of 6-8 MPa and a terminal pressure of 12-16 MPa; after pressing, the production mold box is demolded after standing at room temperature for 8-12 hours to obtain a pressed homogeneous plate with a built-in keel.

[0045] It should be noted that dry or semi-dry concrete is an existing technology and will not be described in detail here; the amount of dry or semi-dry concrete required for each homogeneous board is a common practice in the field and will not be described in detail; the focus of this application is on: how to press the keel and dry or semi-dry concrete into shape to obtain a homogeneous board with a built-in keel.

[0046] In this embodiment, the gradient stage pressurization allows the dry / semi-dry concrete particles to fill the pores layer by layer, reducing the porosity by 30%-40%, significantly improving the compressive strength, which can reach more than 10MPa, and the flexural toughness; the gradient pressing realizes the integration of "laying-compacting-molding", eliminating the secondary reinforcement of traditional processes, such as injection or welding, and shortening the production cycle by 40%; in conjunction with the keel limiting unit 17 in the production mold box, the keel displacement during the gradient pressing process is ≤0.5mm, while the traditional process is ≥3mm.

[0047] A production mold box of a press-formed homogeneous plate with a built-in keel according to an embodiment of the present application is as follows: Figure 1-Figure 4 As shown, the production mold box 1 includes a pressing plate 11, a mold frame 12 and a bottom bracket 13. The mold frame 12 is formed by welding four panels end to end in sequence. The upper end and the lower end of the mold frame 12 are both open; the bottom of the mold frame 12 is detachably arranged on the bottom bracket 13, and the bottom bracket 13 closes the lower opening of the mold frame 12; the mold frame 12 and the bottom bracket 13 are connected by a buckle lock 14, and the buckle lock 14 fixes the mold frame 12 and the bottom bracket 13 relatively. During the pressing process, there will be no displacement between the mold frame 12 and the bottom bracket 13; the buckle lock 14 is a prior art and will not be described here; the bottom of the bottom bracket 13 is provided with a roller 15, so that the production mold box 1 can move along the guide rail on the production line;

[0048] The pressing plate 11 is placed in the mold frame 12, and the size of the pressing plate 11 matches the inner wall of the mold frame 12 to prevent the dry or semi-dry concrete from leaking out;

[0049] The mold frame 12 is provided with a pressing plate limiting structure 16, which limits the position of the pressing plate 11 in the mold frame 12, limits the upward movement of the pressing plate 11 relative to the mold frame 12, and plays a limiting role; after the homogeneous plate in the production mold box 1 is pressed and formed, the buckle lock 14 is opened, and then the mold frame 12 is lifted, and then the pressing plate 11 is removed, and then the mold frame 12 is put down; the structure of the pressing plate limiting structure 16 is a prior art, such as the pressing plate limiting structure disclosed in the publication number CN113510827A, which will not be repeated here;

[0050] The mold frame 12 is movably provided with a keel limiting unit 17 for limiting the built-in keel 2 during press molding to prevent the built-in keel 2 from deformation or displacement during the pressing process; when the built-in keel 2 is demoulded, the keel limiting unit 17 does not contact the built-in keel 2; preferably, the keel limiting unit 17 is symmetrically arranged on the short side of the mold frame 12.

[0051] Furthermore, if Figure 1 and Figure 5-Figure 7 As shown, the keel limiting unit 17 includes an ear seat 171 connected to the outer side of the mold frame 12, and the mold frame 12 is provided with a clearance hole 121, and the clearance hole 121 is located on the side of the ear seat 171, and the number of the clearance holes 121 is the same as the number of the ear seats 171; the ear seat 171 is connected to a limiting block 173 through a connecting pin 172; the limiting block 173 takes the center of the connecting pin 172 as a fulcrum and can rotate relative to the ear seat 171; the limiting block 173 matches the clearance hole 121 to prevent the dry or semi-dry concrete in the mold frame 12 from leaking out of the clearance hole 121, and the position of the limiting block 173 is lower than the position of the pressing plate limiting structure 16; because the pressing plate limiting structure 16 is used for limiting the pressing plate 11, the limiting block 173 is used for limiting the built-in keel 2;

[0052] The limit block 173 includes a block body 1731, on which a mounting hole is provided, and the mounting hole is connected to the ear seat 171 through a connecting pin 172; a support platform 1734 for supporting the built-in keel 2 is formed on the block body 1731, and during the pressing process, the support platform 1734 is located in the mold frame 12, and during demoulding, the support platform 1734 rotates so that the support platform 1734 does not contact the built-in keel 2, and the support platform 1734 is not in the mold frame 12, which is convenient for demoulding; a block arc portion 1732 matching the clearance hole 121 is formed on the block body 1731, and the curvature radius of the block arc portion 1732 is completely matched with the edge of the clearance hole through the design of matching the block arc portion 1732 with the clearance hole 121, which can prevent dry or semi-dry concrete from leaking out of the clearance hole 121; a handle portion 1733 for easy rotation is formed on the block body 1731.

[0053] The above adopts a leak-proof sealing design: the arc portion 1732 of the clamp block is precisely matched with the clearance hole 121, and the curvature radius of the arc portion 1732 of the clamp block is completely matched with the edge of the clearance hole, forming a physical seal, which effectively prevents dry or semi-dry concrete particles from overflowing from the gap; the arc surface contact disperses the pressure through surface contact during the pressing stage to avoid deformation caused by local stress concentration; the support platform rotates and exits during the demoulding stage to ensure the demoulding of the built-in keel homogeneous plate.

[0054] Furthermore, in one embodiment, the built-in keel 2 is I-shaped.

[0055] Preferably, in this embodiment, Figure 8-Figure 10 As shown, the built-in keel 2 includes a first keel 21 and a second keel 22 arranged at intervals, the first keel 21 and the second keel 22 are connected by a connecting member 23, and the connecting member 23 is parallel to the horizontal plane; the structure of the second keel 22 is the same as that of the first keel 21, the first keel 21 includes a keel body 211, and the keel body 211 forms a preset angle with the horizontal plane, and the preset angle is 83 degrees-107 degrees. At this angle, the built-in keel 2 will not deflect during the pressing process, as shown in FIG. Fig.10 As shown; preferably, the keel body 211 is perpendicular to the horizontal plane; the two ends of the connecting member 23 are respectively connected to the corresponding keel body 211;

[0056] The upper end of the keel body 211 extends to the right to form an upper supporting keel 212, and the lower end of the keel body 211 extends to the left to form a lower supporting keel 213; it should be noted that when the keel body 211 is at a preset angle with the horizontal plane, the keel limiting unit 17 and the built-in keel 2 can be limited, that is, the keel limiting unit 17 can cooperate with the upper supporting keel 212 or the lower supporting keel 213;

[0057] Or, the upper end of the keel body 211 extends to the left to form an upper supporting keel 212, and the lower end of the keel body 211 extends to the right to form a lower supporting keel 213;

[0058] Preferably, the upper supporting keel 212 is parallel to the horizontal plane; the lower supporting keel 213 is parallel to the horizontal plane; the connecting member 23 is close to the upper supporting keel 212; and the connecting member 23 is parallel to the horizontal plane.

[0059] It should be noted that the built-in keel 2 may also only have the first keel 21 structure; the limiting member 17 provides limiting support for the upper supporting keel 212 and the lower supporting keel 213 of the first keel 21 .

[0060] Furthermore, if Fig.11As shown, at least one first vertical compression keel 214 extends downward from the end of the upper supporting keel 212, and at least one second vertical compression keel 215 extends downward from the end of the lower supporting keel 213. The first vertical compression keel 214 and / or the second vertical compression keel 215 form an angle of 83 degrees to 107 degrees with the horizontal plane, thereby increasing the bending toughness of the overall built-in keel 2.

[0061] When the built-in keel 2 is placed in the mold frame 12, the connecting piece 23 cooperates with the corresponding supporting platform 1734; the upper supporting keel 212 and the lower supporting keel 213 can be used as the punching part during installation, and the built-in keel 2 increases the compressive resistance of the homogeneous plate, and the connecting piece 23 ensures that the first keel 21 and the second keel 22 will not be deformed or shifted during the pressing process; when the bulk density of the feed material is 180 kg, the compressive strength of the upper and lower and left and right sides of the built-in keel 2 can reach the ideal 0.5-0.6 MPa; when the bulk density of the feed material is 180 kg, the external compressive strength of the C-shaped keel can reach 0.5-0.6 MPa, while the internal compressive strength of the C-shaped keel is only 0.12-0.16 MPa.

[0062] In this embodiment, the vertical keel body 211 is combined with the horizontally extended upper support keel 212 and the lower support keel 213, and the vertical pressure is transmitted to the support platform through the keel body 211, and the lateral stress is dispersed by the upper support keel 212 and the lower support keel 213, so that the bidirectional compressive strength is improved by 30%-40%; the connection piece 23 cooperates with the support platform 1734, so that the built-in keel is constrained in the mold frame, and the displacement during the pressing process is ≤0.3mm; the horizontal extension sections of the upper support keel 212 and the lower support keel 213 form a "cantilever beam effect", which inhibits the distortion of the keel body 211 under the action of the lateral force of the pressing; the upper support keel 212 and the lower support keel 213 are used as pre-set punching parts, and no on-site positioning and measurement are required during installation, and damage to the homogeneous plate substrate is avoided; the Z-shaped cross-section formed by the keel body and the support keel makes its bending inertia moment reach 1.8 times that of the ordinary rectangular cross-section keel, allowing the thickness of the homogeneous plate to be reduced by 15% and still meet the deflection requirements.

[0063] An embodiment of the present application provides a press-formed homogeneous plate with built-in keel, and the homogeneous plate with built-in keel is produced by the production method of the press-formed homogeneous plate with built-in keel described above.

[0064] In summary, the beneficial effects of the production method of the press-formed built-in keel homogeneous board, the homogeneous board and the mold box of the present application are: the built-in keel will not be deformed or displaced in the homogeneous board, so that the built-in keel can exert the best compressive resistance; the design of the keel limiting unit can make the built-in keel accurately positioned, and will not affect the demolding of the built-in keel after forming, and the concrete will not leak out during the press forming process; the built-in keel with a preset structure has a wide bonding area with the concrete, and there is no pressing defect area, so that the strength of the plate is uniform everywhere.

[0065] In addition, it should be noted that the use of terms such as "first" and "second" to limit components is only for the convenience of distinguishing the corresponding components. Unless otherwise stated, the above terms have no special meaning and therefore cannot be understood as limiting the scope of protection of this application.

[0066] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "provided with", "connected", etc. should be understood in a broad sense. For example, "connected" can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0067] The above description is only a preferred embodiment of the present invention. All equivalent changes and modifications made according to the scope of the patent application of the present invention should fall within the scope of the present invention.

Claims

1. A method for producing a press-formed homogeneous plate with a built-in keel, characterized in that: The specific steps are as follows: Step S1, preparing a production mold box and a built-in keel; Step S2, placing the built-in keel of step S1 in the production mold box, so that the built-in keel matches the keel limiting unit of the production mold box; Step S3, pouring dry or semi-dry concrete into a production mold box, and then pressing a pressing plate of the production mold box onto the dry or semi-dry concrete; Step S4, compression molding: Use a press machine to gradiently compress the pressing plate in the production mold box, and then demold the production mold box to obtain a press-molded built-in keel homogeneous plate.

2. The method for producing a press-formed homogeneous plate with built-in keel according to claim 1, characterized in that: The pressure of the gradient pressing in step S4 is set to an initial pressure of 6-8 MPa and a terminal pressure of 12-16 MPa; after pressing, the production mold box is demolded after standing at room temperature for 8-12 hours to obtain a pressed homogeneous plate with a built-in keel.

3. A press-formed homogeneous plate with built-in keel, characterized in that: The built-in keel homogeneous plate is produced by the production method of the press-formed built-in keel homogeneous plate according to claim 1 or 2.

4. A production mold box for a method for producing a homogeneous plate with a built-in keel formed by compression molding as claimed in claim 1 or 2, characterized in that: The production mold box includes a pressing plate, a mold frame and a bottom bracket. The bottom of the mold frame is detachably arranged on the bottom bracket, and the bottom bracket closes the lower opening of the mold frame. The mold frame and the bottom bracket are connected by a buckle lock. The pressing plate is placed in the mold frame, and the size of the pressing plate matches the inner wall of the mold frame. The mold frame is provided with a keel limiting unit for limiting the position of the built-in keel when it is pressed and formed; when the built-in keel is demoulded, the keel limiting unit does not contact the built-in keel.

5. The production mold box of the press-formed homogeneous plate with built-in keel as claimed in claim 4, characterized in that: The mold frame is provided with a pressing plate limiting structure, and the pressing plate limiting structure limits the position of the pressing plate in the mold frame.

6. The production mold box of the press-formed homogeneous plate with built-in keel as claimed in claim 4, characterized in that: The keel limiting unit includes an ear seat connected to the outer side of the mold frame, and the mold frame is provided with a clearance hole, the clearance hole is located on the side of the ear seat, and the number of the clearance holes is the same as the number of the ear seat; the ear seat is connected to a limiting block through a connecting pin shaft; the limiting block takes the center of the connecting pin shaft as a fulcrum and can rotate relative to the ear seat; the limiting block matches the clearance hole.

7. The production mold box of the press-formed homogeneous plate with built-in keel as claimed in claim 6, characterized in that: The limit block includes a block body, a mounting hole is formed on the block body, and the mounting hole is connected to the ear seat through a connecting pin; a support platform for supporting the built-in keel is formed on the block body, and during the pressing process, the support platform is located in the mold frame, and during demolding, the support platform rotates so that the support platform does not contact the built-in keel and the support platform is not in the mold frame; a block arc portion that matches the clearance hole is formed on the block body, and the curvature radius of the block arc portion is completely matched with the edge of the clearance hole.

8. The production mold box of the press-formed homogeneous plate with built-in keel as claimed in claim 7, characterized in that: The built-in keel is in an I-shape.

9. The production mold box of the press-formed homogeneous plate with built-in keel according to claim 7, characterized in that: The built-in keel includes a first keel, the first keel includes a keel body, and the keel body forms a preset angle with the horizontal plane; The upper end of the keel body extends to the right to form an upper supporting keel, and the lower end of the keel body extends to the left to form a lower supporting keel; Alternatively, the upper end of the keel body extends leftward to form an upper supporting keel, and the lower end of the keel body extends rightward to form a lower supporting keel.

10. The production mold box of the press-formed homogeneous plate with built-in keel according to claim 9, characterized in that: The built-in keel also includes a second keel, which is spaced apart from the first keel; the structure of the second keel is the same as that of the first keel; the first keel and the second keel are connected by a connecting piece; when the built-in keel is placed in the mold frame, the connecting piece cooperates with the corresponding supporting platform.

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