Combination type forming base material
By designing a combined structure of a composite forming substrate, including a composite structure of a sub-base and a parent substrate, the problem of limited processing parts sizes of existing 3D printing equipment is solved, and effective forming and post-processing of larger-sized parts is achieved, and the utilization and efficiency of the equipment is improved.
Patent Information
- Application Number
- CN202421513688.9
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-06-28
- Publication Date
- 2025-05-06
- Estimated Expiration
- 2034-06-28
AI Technical Summary
The post-processing equipment of existing 3D printing equipment is circular in the inner cavity and the forming substrate is square in the shape, which limits the maximum size of the parts that can be post-processed, resulting in the inability to effectively process larger slewing parts.
A combined forming substrate is adopted, including a sub-base material and a parent substrate arranged around the periphery of the sub-base material. Through the design of connecting bolts and anti-slip disengagement parts, a detachable combined structure is formed to adapt to post-processing equipment of different sizes.
Through this combined forming substrate design, the maximum size of the rotary body parts that the post-processing equipment can handle can be significantly improved, the utilization rate of part forming is improved, and the existing equipment is not required to replace it, which can reduce costs and increase efficiency.
Smart Images
Figure CN222832396U_ABST
Abstract
Description
Technical Field
[0001] The utility model belongs to the field of 3D printing and relates to a forming substrate, in particular to a combined forming substrate. Background Art
[0002] At present, 3D printing equipment usually uses square forming substrates, and after the parts are printed, they are usually post-processed by rotary post-processing equipment, such as cleaning the parts. Since the inner cavity cross-section of the rotary post-processing equipment is circular, and the forming substrate is square, this limits the maximum size of the forming substrate that can be post-processed to the diagonal of the forming substrate equal to the diameter of the cross-section of the post-processing equipment. The maximum size of the rotating body part that can be formed on such a forming substrate is that the part diameter is equal to the side length of the forming substrate, which limits the size of the parts that can be processed by the post-processing equipment. Utility Model Content
[0003] In order to solve the above technical problems existing in the background technology, the utility model provides a combined forming substrate which can maximize the size of the rotating body parts that can be processed by the post-processing equipment.
[0004] In order to achieve the above purpose, the utility model adopts the following technical solutions:
[0005] A combined forming substrate, characterized in that: the combined forming substrate comprises a sub-substrate and a mother substrate which is arranged around the periphery of the sub-substrate and is tightly attached to the periphery of the sub-substrate.
[0006] The mother substrate is a split structure or an integrated structure.
[0007] When the above-mentioned mother substrate is a split structure, the mother substrate includes a first mother substrate, a second mother substrate and connecting bolts; the structure of the first mother substrate is exactly the same as that of the second mother substrate; the first mother substrate and the second mother substrate are buckled and placed on the peripheral side of the sub-substrate through the connecting bolts.
[0008] The above-mentioned combined forming substrate also includes an anti-slip member placed between the mother substrate and the sub-substrate; the anti-slip member includes a first anti-slip member arranged on the outer surface of the sub-substrate and a second anti-slip member arranged on the inner surface of the mother substrate; the first anti-slip member is compatible with the second anti-slip member.
[0009] The first anti-slip member is a chamfer, a protrusion or a groove.
[0010] When the first anti-slip member is a protrusion, the cross section of the protrusion is semicircular, rectangular or V-shaped; when the first anti-slip member is a groove, the cross section of the groove is rectangular, semicircular or V-shaped.
[0011] When the mother substrate is an integrated structure, the mother substrate is provided with a through hole along the thickness direction of the mother substrate; the inner wall of the through hole is tightly fitted with the side wall of the sub-substrate.
[0012] The above-mentioned combined forming substrate further comprises an anti-slipping member arranged on the inner surface of the mother substrate; the anti-slipping member is a spring-type anti-slipping member or a pneumatic anti-slipping member;
[0013] When the anti-slipping part is a spring-type anti-slipping part, the anti-slipping part includes a clamping block, a sealing ring, a spring and a spring cover plate; a working groove is arranged on the mother substrate; the axial direction of the working groove is perpendicular to the axial direction of the mother substrate; the spring and the clamping block are arranged in the working groove in sequence along the axial direction of the working groove; the clamping block extends to the side wall of the sub-substrate; a sealing ring is arranged between the clamping block and the spring; the spring cover plate squeezes the spring and blocks the working groove;
[0014] When the anti-slip part is a pneumatic anti-slip part, the anti-slip part includes a clamping block, a sealing ring, a spring and a spring cover; a working groove and a flow channel intersecting the working groove are provided on the mother substrate; a joint is provided at the inlet end of the flow channel; the axial direction of the working groove is perpendicular to the axial direction of the mother substrate; the working groove is a step hole; the spring and the clamping block are sequentially arranged in the working groove along the axial direction of the working groove; the spring cover squeezes the spring and then blocks the working groove; the clamping block extends to the side wall of the sub-substrate; a sealing ring is provided between the clamping block and the mother substrate.
[0015] A positioning groove is arranged on the side wall of the sub-base material; the anti-slipping piece is stuck in the positioning groove; and there are a plurality of anti-slipping pieces.
[0016] The sub-substrate is a cylinder or a truncated cone; the surface of the mother substrate is provided with an anti-rust layer; the combined forming substrate also includes heating plate connecting bolts arranged on the mother substrate.
[0017] The advantages of the utility model are:
[0018] The utility model provides a combined forming substrate, including a sub-substrate and a mother substrate that is arranged around the circumference of the sub-substrate and closely fits the circumference of the sub-substrate. The utility model designs a rotating body sub-substrate of the largest format according to the inner cavity size of the post-processing equipment, prints rotating body parts on the rotating body sub-substrate, and after printing, transfers the sub-substrate to the post-processing equipment for post-processing. Since the maximum size of the rotating body parts that can be formed on the sub-substrate is increased, the size of the rotating body parts that can be processed by the post-processing equipment is increased. Moreover, compared with a square substrate, the utilization rate of the sub-substrate is higher when the rotating body parts are formed on the rotating body sub-substrate. In addition, the rotating body sub-substrate and the mother substrate in the utility model are combined to form a square substrate, and there is no need to replace the existing printing equipment and post-processing equipment, which can reduce unnecessary equipment waste and achieve cost reduction and efficiency improvement. BRIEF DESCRIPTION OF THE DRAWINGS
[0019] Figure 1 is a schematic diagram of the overall structure of the combined forming substrate used in Example 1;
[0020] Figure 2 yes Figure 1 Schematic diagram of the structure viewed from above;
[0021] Figure 3 yes Figure 1 A schematic diagram of a top view structure;
[0022] Figure 4 yes Figure 1 A schematic cross-sectional structure diagram of;
[0023] Figure 5 is a schematic diagram of the overall structure of the sub-substrate used in Example 1;
[0024] Figure 6 is a schematic diagram of the overall structure of the combined forming substrate used in Example 2;
[0025] Figure 7 yes Figure 6 Schematic diagram of the structure viewed from above;
[0026] Figure 8 yes Figure 6 A schematic diagram of a top view structure;
[0027] Fig. 9 yes Figure 6 Schematic diagram of a cross-sectional structure (rectangular groove);
[0028] Fig.10 is a schematic diagram of the overall structure of the sub-substrate used in Example 2;
[0029] Fig.11 yes Figure 6 Schematic diagram of the cross-sectional structure (V-shaped groove);
[0030] Fig.12 yes Figure 6 Schematic diagram of the cross-sectional structure (semicircular groove);
[0031] Fig.13 is a schematic diagram of the overall structure of the combined forming substrate used in Example 3;
[0032] Fig.14 is a schematic diagram of the overall structure of the sub-substrate used in Example 3;
[0033] Fig.15 yes Fig.13 A schematic diagram of a top view structure;
[0034] Fig.16 yes Fig.13 Schematic diagram of the cross-sectional structure (including spring-type anti-slip parts);
[0035] Fig.17 yes Fig.16 A schematic diagram of the enlarged structure at point A;
[0036] Fig.18 yes Fig.13 Schematic diagram of the cross-sectional structure (including pneumatic anti-slip parts);
[0037] Fig.19 yes Fig.18 A schematic diagram of a local enlarged structure;
[0038] in:
[0039] 1-sub-substrate; 11-positioning groove; 2-mother substrate; 21-first mother substrate; 22-second mother substrate; 23-connecting bolts; 24-heating plate connecting bolts; 3-clamping block; 4-sealing ring; 5-spring; 6-spring cover; 7-connector; 8-flow channel. DETAILED DESCRIPTION
[0040] The utility model provides a combined forming substrate, comprising a sub-substrate 1 and a mother substrate 2 which is arranged around the circumference of the sub-substrate 1 and is tightly fitted with the circumference of the sub-substrate 1. The sub-substrate 1 and the mother substrate 2 form a combined forming substrate, and the two are detachable. After disassembly, the sub-substrate 1 with the forming parts is transported to a powder cleaning machine for powder cleaning; when the two are combined, forming work is performed in a forming device.
[0041] The mother substrate 2 is a split structure or an integrated structure; the sub-substrate 1 is a cylinder or a frustum, such as Figure 5 , Fig.10 as well as Fig.11 No matter what form the sub-substrate 1 is in, and no matter what structure the mother substrate 2 is in, the mother substrate 2 is placed outside the sub-substrate 1 and forms a detachable formed substrate with the sub-substrate 1.
[0042] See also Figure 1 as well as Figure 6 When the mother substrate 2 is a split structure, the mother substrate 2 includes a first mother substrate 21, a second mother substrate 22 and a connecting bolt 23; illustratively, the structure of the first mother substrate 21 can be completely the same as that of the second mother substrate 22, or the structures of the two are different. When the first mother substrate 21 and the second mother substrate 22 are buckled, a cavity matching the sub-substrate 1 is formed. When in use, the first mother substrate 21 and the second mother substrate 22 are placed opposite to the side of the sub-substrate 1 and form an integral structure with the sub-substrate 1. Subsequently, the first mother substrate 21 and the second mother substrate 22 are connected by the connecting bolt 23 to form a stable whole.
[0043] In order to prevent the sub-substrate 1 from slipping off the mother substrate 2, see Figure 4 , Fig. 9 , Fig.11 as well as Fig.12 The combined forming substrate further includes an anti-slip member disposed between the mother substrate 2 and the sub-substrate 1. The anti-slip member includes a first anti-slip member disposed on the outer surface of the sub-substrate 1 and a second anti-slip member disposed on the inner surface of the mother substrate 2; the first anti-slip member is adapted to the second anti-slip member.
[0044] Exemplarily, the first anti-slip member may be a chamfer, a protrusion or a groove, and the second anti-slip member is a guide groove matching the chamfer, a groove or a recess matching the protrusion, or a protrusion or a ridge matching the groove.
[0045] For example, see Figure 5 When the first anti-slipping member is disposed on the chamfer of the side wall of the sub-substrate 1, the second anti-slipping member is a guide groove disposed on the inner wall of the first mother substrate 21 and the inner wall of the second mother substrate 22, such as Figure 4 As shown, the chamfer fits the guide groove surface, which has a good anti-slip effect.
[0046] When the first anti-slipping member is a protrusion, that is, a dot-shaped, block-shaped or ring-shaped protrusion is provided on the side wall of the sub-substrate 1, at this time, the second anti-slipping member is a groove, countersunk hole or other structure adapted to the protrusion provided on the inner wall of the first mother substrate 21 and the inner wall of the second mother substrate 22, and the protrusion or the groove is adapted to achieve the purpose of anti-slipping. Exemplarily, the cross section of the protrusion can be semicircular, rectangular or V-shaped.
[0047] For example, see Fig.10 When the first anti-slipping member is a groove arranged on the side wall of the sub-substrate 1, the second anti-slipping member is a protrusion arranged on the inner wall of the first mother substrate 21 and the inner wall of the second mother substrate 22 and completely matching with the groove, such as Fig. 9 , Fig.11 as well as Fig.12 As shown, the protrusion and the groove are stuck together to achieve the purpose of anti-slip. Fig. 9 As shown), semicircular (as Fig.12 as shown) or V-shaped (as Fig.11 shown).
[0048] See also Fig.13When the mother substrate 2 is an integrated structure, the mother substrate 2 is provided with a through hole along the thickness direction of the mother substrate 2; the inner wall of the through hole is closely fitted with the side wall of the sub-substrate 1. When the sub-substrate 1 is a truncated cone, the through hole is conical and closely fitted with the sub-substrate 1; when the sub-substrate 1 is a cylinder, the through hole is cylindrical and closely fitted with the sub-substrate 1. At the same time, under this structure, in order to prevent the sub-substrate 1 from slipping off the mother substrate 2, the combined forming substrate provided by the utility model also includes an anti-slipping member arranged on the inner surface of the mother substrate 2.
[0049] See also Fig.16 as well as Fig.17 The anti-slip part used in the utility model includes a clamping block 3, a sealing ring 4, a spring 5 and a spring cover plate 6, that is, the anti-slip part is a spring-type anti-slip part. At this time, a working groove is provided on the mother substrate 2; the axial direction of the working groove is perpendicular to the axial direction of the mother substrate 2; the spring 5 and the clamping block 3 are sequentially arranged in the working groove along the axial direction of the working groove; the clamping block 3 extends to the side wall of the sub-substrate 1; a sealing ring 4 is provided between the clamping block 3 and the mother substrate 2 for dust prevention; the spring cover plate 6 squeezes the spring 5 and then blocks the working groove. When the mother substrate 2 is placed on the side wall of the sub-substrate 1, due to the action of the spring 5, the clamping block 3 is squeezed on the side wall of the sub-substrate 1 to prevent the sub-substrate 1 from slipping out of the through hole of the mother substrate 2.
[0050] In addition, the utility model is provided with a positioning groove 11 on the side wall of the sub-substrate 1; the anti-slip member is stuck in the positioning groove 11. Exemplarily, the axial direction of the positioning groove 11 is perpendicular to the axial direction of the sub-substrate 1. Generally speaking, the positioning groove 11 can be of two structures, a broken head groove or a through groove. The broken head groove is a groove milled on the side wall of the sub-substrate 1 to form a broken head shape; the through groove is a groove milled on the side wall of the sub-substrate 1 to form a through shape, such as Fig.14 shown.
[0051] For the broken groove or the through groove, when the mother substrate 2 is placed on the side wall of the sub-substrate 1, the side wall of the sub-substrate 1 squeezes the clamping block 3 and the spring 5 to deform. After the clamping block 3 is aligned with the edge of the positioning groove 11, the clamping block 3 is rotated and aligned in the positioning groove 11 by rotating the sub-substrate 1 or the mother substrate 2. Under the action of the spring 5, the clamping block 3 is squeezed in the positioning groove 11 of the sub-substrate 1 to prevent the sub-substrate 1 from slipping out of the through hole of the mother substrate 2.
[0052] Of course, when the anti-slipping piece is used in the present invention, a pneumatic anti-slipping piece can also be used. Fig.18 as well as Fig.19 The structure of the pneumatic anti-slip member is Fig.16 as well as Fig.17The structures of the spring-type anti-slip parts are basically the same, including a clamping block 3, a sealing ring 4, a spring 5 and a spring cover plate 6. The difference is that the pneumatic anti-slip part also includes a joint 7 and a flow channel 8, both of which are arranged on the mother substrate 2. The joint 7 and the flow channel 8 are connected with the working groove of the mother substrate 2. Gas is introduced into the working groove through the joint 7 and the flow channel 8, and the gas pressure is adjusted to enable the clamping block 3 to move freely in the working groove of the mother substrate 2. When the pneumatic anti-slip part is used, air is ventilated in the joint 7 of the mother substrate 2, and the air flow is transmitted to the clamping block 3 through the flow channel 8. When the air pressure is greater than the spring clamping force, the clamping block 3 moves outward in the working groove of the mother substrate 2 to achieve the relaxation process. The sub-substrate 1 is placed inside the mother substrate 2, and the air is cut off from the joint 7 of the mother substrate 2. At this time, the clamping block 3 moves inward under the action of the spring 5 to achieve the clamping process.
[0053] Exemplarily, the number of anti-slip pieces can be multiple, and the multiple anti-slip pieces are all set on the side wall of the sub-substrate 1; Exemplarily, there is only one anti-slip piece, in which case, one or more positioning grooves 11 can be set. When multiple anti-slip pieces are set, the alignment time between the anti-slip piece and the positioning groove 11 can be reduced, and the work efficiency can be improved. Of course, the number of anti-slip pieces can match the number of positioning grooves 11, for example, both are 4.
[0054] In addition, the material of the sub-substrate 1 can be selected according to the material of the printed parts, and the mother substrate 2 can be selected from relatively cheap carbon steel (with anti-rust treatment such as blackening), or an anti-rust layer is provided on the surface of the mother substrate 2; the combined forming substrate also includes a heating plate connecting bolt 24 arranged on the mother substrate 2.
[0055] The technical solution provided by the utility model is described in detail below in conjunction with the accompanying drawings:
[0056] Embodiment 1:
[0057] like Figure 1 , Figure 2 , Figure 3 as well as Figure 4 The combined forming substrate is mainly composed of a sub-substrate 1, a first mother substrate 21, and a second mother substrate 22. Figure 5 In order to facilitate the disassembly of the sub-substrate and printed parts and reduce the influence of thermal deformation of the parts on the residual stress of the substrate, the sub-substrate 1 is a truncated cone. The definition of a truncated cone is that the upper surface is a circular surface with a smaller area and the lower surface is a circular surface with a larger area, that is, S 上表面 / S 下表面 The first mother substrate 21 and the second mother substrate 22 are joined together by connecting bolts 23 , and the through holes thereof are connected to the heating plate bolts 24 .
[0058] The top of the sub-substrate 1 is equipped with a lifting hole at a suitable position, the bottom of the mother substrate 2 has a flange edge, and the lower surface edge of the sub-substrate 1 has a straight chamfer (see Figure 3 ), the connection here should ensure that the combined substrate will not slide down after being firmly connected. In order to prevent powder from entering the threaded holes and facilitate the rapid separation of the first mother substrate 21 and the second mother substrate 22, the head of the connecting bolt 23 should be sunk into the mother substrate, and the screw hole between the mother substrate 2 and the heating plate should be equipped with a screw hole protection cap.
[0059] When the combined forming substrate is in use, the sub-substrate 1 is placed on a horizontal plane (with the lower surface facing downward), and the first mother substrate 21, the second mother substrate 22 and the connecting bolts 23 are assembled in sequence. If necessary, pins are inserted into the joints of the first mother substrate 21 and the second mother substrate 22. The assembled combined forming substrate is hoisted onto the heating plate and fastened by the heating plate connecting bolts 24. After printing and cleaning, the heating plate connecting bolts 24 between the combined forming substrate and the heating plate are removed, the combined forming substrate is hoisted away, the connecting bolts 23 between the first mother substrate 21 and the second mother substrate 22 are removed, and the sub-substrate 1 with printed parts is taken out to enter the next post-processing process.
[0060] Embodiment 2:
[0061] See also Figure 6 , Figure 7 , Figure 8 as well as Fig. 9 This embodiment is basically the same as the embodiment 1, except that the sub-substrate 1 is cylindrical. Fig.10 At the same time, in order to facilitate the removal of the sub-substrate and the printed parts, the side wall of the sub-substrate 1 begins to have a circumferential inward milling groove (the first anti-slip member). Of course, see Fig.11 as well as Fig.12 The circumferential inner milling groove (first anti-slip member) can be semicircular (such as Fig.12 ) or V-groove (such as Fig.11 ), the flange of the mother substrate 2 can be semicircular or inverted V-shaped, which can further improve the overall stability of the combined substrate.
[0062] The usage of this embodiment is the same as that of Embodiment 1, and will not be described again here.
[0063] Embodiment 3:
[0064] like Fig.13 , Fig.14 , Fig.15 , Fig.16 as well as Fig.17 As shown, the present embodiment is different from the previous two embodiments in that: 1) the mother substrate 2 adopts an integrated structure; 2) the sub-substrate 1 is a cylindrical structure; 3) the anti-slip parts used are completely different.
[0065] In order to facilitate the disassembly of the sub-substrate and the printed parts, the side wall of the sub-substrate 1 has positioning grooves 11, a total of four, and a lifting hole is provided at a suitable position on the top. The joint 7 is threadedly matched with the flow channel 8 of the mother substrate 2, one end of the spring 5 is connected to the clamping block 3, and the other end is connected to the spring cover 6. The sealing ring 4 arranged between the clamping block 3 and the mother substrate 2 can ensure the air tightness of the internal space when the clamping block moves in the mother substrate motion groove. When this embodiment is in use, the mother substrate 2 is placed on the upper surface of the heating plate and fastened by the heating plate connecting bolts 24. Through the joint 7 and the channel 8 of the mother substrate 2, the air is ventilated to the working groove until the air pressure is greater than the clamping force of the spring 5, and the clamping block 3 moves outward in the working groove of the mother substrate 2 to realize the relaxation process. The sub-substrate 1 is placed inside the mother substrate 2, the joint 7 of the mother substrate 2 is cut off, and the clamping block 3 moves inward under the action of the spring 5 to realize the clamping process. After printing and cleaning powder are completed, the clamping block 3 is relaxed, the sub-substrate 1 with printed parts is taken out, and the next post-processing process is entered.
Claims
1. A combined forming substrate, characterized in that: The combined forming substrate comprises a sub-substrate (1) and a mother substrate (2) which is arranged around the circumference of the sub-substrate (1) and is in close contact with the circumference of the sub-substrate (1).
2. The combined forming substrate according to claim 1, characterized in that: The mother substrate (2) is a split structure or an integrated structure.
3. The combined forming substrate according to claim 2, characterized in that: When the mother substrate (2) is a split structure, the mother substrate (2) comprises a first mother substrate (21), a second mother substrate (22) and a connecting bolt (23); the first mother substrate (21) and the second mother substrate (22) are fastened together by the connecting bolt (23) and are placed on the peripheral side of the sub-substrate (1).
4. The combined shaped substrate according to claim 3, characterized in that: The combined forming substrate further comprises an anti-slip member disposed between the mother substrate (2) and the sub-substrate (1); the anti-slip member comprises a first anti-slip member disposed on the outer surface of the sub-substrate (1) and a second anti-slip member disposed on the inner surface of the mother substrate (2); the first anti-slip member is adapted to the second anti-slip member.
5. The combined forming substrate according to claim 4, characterized in that: The first anti-slip component is a chamfer, a protrusion or a groove.
6. The combined forming substrate according to claim 5, characterized in that: When the first anti-slip member is a protrusion, the cross section of the protrusion is semicircular, rectangular or V-shaped; when the first anti-slip member is a groove, the cross section of the groove is rectangular, semicircular or V-shaped.
7. The combined forming substrate according to claim 2, characterized in that: When the mother substrate (2) is an integrated structure, the mother substrate (2) is provided with a through hole along the thickness direction of the mother substrate (2); the inner wall of the through hole is tightly fitted with the side wall of the sub-substrate (1).
8. The combined forming substrate according to claim 7, characterized in that: The combined forming substrate further comprises an anti-slip member arranged on the inner surface of the mother substrate (2); the anti-slip member is a spring-type anti-slip member or a pneumatic anti-slip member; When the anti-slip part is a spring-type anti-slip part, the anti-slip part comprises a clamping block (3), a sealing ring (4), a spring (5) and a spring cover plate (6); a working groove is provided on the mother substrate (2); the axial direction of the working groove is perpendicular to the axial direction of the mother substrate (2); the working groove is a stepped hole; the spring (5) and the clamping block (3) are sequentially arranged in the working groove along the axial direction of the working groove; the clamping block (3) extends toward the side wall of the sub-substrate (1); a sealing ring (4) is provided between the clamping block (3) and the mother substrate (2); the spring cover plate (6) squeezes the spring (5) and then blocks the working groove; When the anti-slip part is a pneumatic anti-slip part, the anti-slip part comprises a clamping block (3), a sealing ring (4), a spring (5) and a spring cover plate (6); a working groove and a flow channel (8) intersecting the working groove are provided on the mother substrate (2); a joint (7) is provided at the inlet end of the flow channel (8); the axial direction of the working groove is perpendicular to the axial direction of the mother substrate (2); the working groove is a stepped hole; the spring (5) and the clamping block (3) are sequentially arranged in the working groove along the axial direction of the working groove; the spring cover plate (6) squeezes the spring (5) and then blocks the working groove; the clamping block (3) extends to the side wall of the sub-substrate (1); and a sealing ring (4) is provided between the clamping block (3) and the mother substrate (2).
9. The combined shaped substrate according to claim 8, characterized in that: A positioning groove (11) is provided on the side wall of the sub-base material (1); the anti-slipping piece is stuck in the positioning groove (11); and there are a plurality of anti-slipping pieces.
10. The combined forming substrate according to any one of claims 1 to 9, characterized in that: The sub-substrate (1) is a cylinder or a truncated cone; the surface of the mother substrate (2) is provided with an anti-rust layer; the combined forming substrate further comprises a heating plate connecting bolt (24) provided on the mother substrate (2).