Additive deposition type industrial mold 3D printer

Abstract

The invention relates to a 3D printer, in particular to an additive deposition type industrial mold 3D printer. The device comprises a position adjusting mechanism, a scraping assembly, a placement table and a heat removal assembly. The placement table is designed to be of a double-face structure, alternate machining treatment is carried out on the bearing area, the whole bearing area does not need to be taken out for cleaning, the printing efficiency is improved, meanwhile, in the finished product printing process of one face of the placement table bearing finished products, the other surface adhering to finished product residues is located in the residue cleaning area, and the printing efficiency is improved. The surface of the placement table in a moving state is scraped through the arranged scraping assembly, adhered residues are scraped, in the scraping work process, waste heat in the printing process is guided to the residue adhesion face through the heat removal assembly, the residue softening efficiency is improved, the scraping assembly is matched to complete further scraping work, and the printing efficiency is improved. And meanwhile, waste heat is fully utilized, and the secondary utilization effect of energy is improved.

Description

Technical Field

[0001] The present invention relates to a 3D printer, and more particularly to an additive deposition type industrial mold 3D printer. Background Art

[0002] The additive deposition type industrial mold 3D printer is a high-end device that combines additive manufacturing technology with mold manufacturing requirements, mainly used for rapid prototype development, small batch production and function optimization of complex molds. Its core feature is to directly construct the mold structure by layer-by-layer deposition of materials, breaking through the process limitations of traditional subtractive manufacturing, and is particularly suitable for the manufacturing of complex molds such as freeform curved surfaces and conformal cooling channels.

[0003] During the process of printing the finished product, the printing is formed by adjusting the position of the 3D printing head. Since the printed finished product needs to be melted and ejected through the 3D printing head, the end area of the 3D printing head needs to be heated at a high temperature so that its raw materials can be quickly melted and formed. At the same time, the heat around the finished product needs to be quickly extracted and discharged to cool and solidify it. Therefore, existing industrial mold 3D printers generally are equipped with a heat dissipation structure for quickly cooling the area around the finished product.

[0004] At the same time, during the forming process, the finished product needs to be lifted by the bottom pallet and drive the formed area to adjust the position to cooperate with the 3D printing head for forming adaptation. Therefore, the bottom of the formed finished product will adhere to the top of the pallet. If not cleaned, the top of the pallet will form a rough surface, resulting in the inability to keep the bottom area smooth during secondary forming, reducing the quality of the formed finished product and even causing printing errors.

[0005] To address the above problems, there is an urgent need for an additive deposition type industrial mold 3D printer that can automatically clean residues. Summary of the Invention

[0006] The purpose of the present invention is to provide an additive deposition type industrial mold 3D printer to solve the problems raised in the above background art.

[0007] To achieve the above purpose, an additive deposition type industrial mold 3D printer is provided, including a combustion chamber and a supporting table installed at the bottom end of the combustion chamber. Inside the combustion chamber, there is a printing head for printing and a driving mechanism for driving the movement of the printing head. At the top of the supporting table, there is a placement table for supporting the printed finished product, and on both sides of the supporting table, there are heat exhaust components for extracting the heat from the finished product area. The placement table is of an I-shaped structure and includes an upper pallet located in the supporting area and a lower pallet located in the cleaning area. On the side of the placement table, there is a steering component for driving it to flip to adjust the positions of the upper pallet and the lower pallet;

[0008] Both sides of the bottom end of the placement table are provided with position adjustment mechanisms, and scraping components are respectively and closely attached to both sides of the bottom end of the lower support plate located in the cleaning area. Under the action of the position adjustment mechanism, the placement table is driven to move longitudinally to cooperate with the print head to complete the printing of finished products;

[0009] The inlet end of the heat exhaust component is aligned with the top surface of the upper support plate, which is used to extract the heat flow generated in the finished product area. The outlet end of the heat exhaust component is aligned with the top surface of the lower support plate, which is used to divert the heat flow to the finished product residue area. During the horizontal movement, the residue is softened by the heat. The bottom end of the lower support plate slides in close contact with the scraping component, and the scraping component is used to scrape the finished product residue adhered to the surface of the lower support plate.

[0010] As a further improvement of the technical solution, the steering component includes a pair of steering shafts and a servo motor coaxially connected to the steering shafts. The two steering shafts are respectively arranged on both sides of the middle position of the placement table. One of the steering shafts is coaxially connected to the servo motor, and the bottom end of the servo motor is fixed at the top position of one of the position adjustment mechanisms. The end of the steering shaft on the other side is rotatably arranged at the top position of the other position adjustment mechanism, so that the servo motor can drive the placement table to flip through the two steering shafts during startup.

[0011] As a further improvement of the technical solution, the heat exhaust component has a U-shaped structure. The top end of the heat exhaust component is the air inlet end, which is used to promptly extract the generated heat flow. The bottom end of the heat exhaust component is the air outlet end, which is used to divert the waste heat to the area adhered with the finished product residue.

[0012] As a further improvement of the technical solution, the air inlet end is aligned with the top surface of the placement table, and the air outlet end extends into the inner position of the bottom end of the support table and is aligned with the bottom surface of the placement table.

[0013] As a further improvement of the technical solution, movable plates are arranged on both sides of the support table. The movable plates are slidably connected to the side surfaces of the support table. The edge area at the top end of the movable plate abuts against the edge area at the bottom surface of the placement table located in the finished product area. A pair of side columns are arranged on both sides of the movable plate, and the movable plate slides along the outside of the two side columns. A limiting spring is sleeved on the outside of the side column. By the pressure exerted by the limiting spring on the movable plate, the two limiting springs are always in close contact with the edge area at the top end of the placement table during the movement.

[0014] As a further improvement of the technical solution, the end of the scraping component close to the placement table is arranged in a wedge shape, and the tip of the wedge shape is in close contact with the bottom end of the placement table.

[0015] As a further improvement of the technical solution, a reset shaft is provided at one end of the scraping assembly away from the placement table. Both ends of the reset shaft are rotatably connected with connecting shafts, and a torsion spring is connected between the positions where the connecting shafts are rotatably connected to the reset shaft. The torsion spring maintains the horizontal state of the scraping assembly before and after flipping, so that it fits against the bottom end of the placement table after flipping and stopping.

[0016] As a further improvement of the technical solution, the ends of the two scraping assemblies are both aligned with the middle position at the bottom end of the placement table, so that the scraping areas formed by the two scraping assemblies can cover the entire bottom area.

[0017] Compared with the prior art, the beneficial effects of the present invention are:

[0018] In this additive deposition type industrial mold 3D printer, by designing the placement table into a double-sided structure and performing rotational processing on the support areas, there is no need to take out the entire support area for cleaning, which improves the printing efficiency. At the same time, during the printing of the finished product on one side of the placement table, the surface adhering to the finished product residue will be in the residue cleaning area. The scraping assembly provided scrapes the surface of the moving placement table to scrape off the adhered residue. During the scraping operation, the heat dissipation assembly guides the waste heat during the printing process to the residue adhering surface to accelerate the softening efficiency of the residue, cooperate with the scraping assembly to complete further scraping work, improve the scraping effect of the residue, and make full use of the waste heat to improve the secondary utilization effect of energy. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 is the overall structural schematic diagram of the present invention;

[0020] Figure 2 is the structural schematic diagram of the combustion chamber of the present invention;

[0021] Figure 3 is the structural schematic diagram of the support table of the present invention;

[0022] Figure 4 is the first cross-sectional view of the support table structure of the present invention;

[0023] Figure 5 is of the present invention Figure 4 partial enlarged view at A;

[0024] Figure 6 is the first plan view of the support table of the present invention;

[0025] Figure 7 is the second plan view of the support table of the present invention;

[0026] Figure 8 is the second cross-sectional view of the support table structure of the present invention;

[0027] Figure 9 The third cross-sectional view of the support table structure of the present invention.

[0028] The meanings of the various reference numerals in the figure are as follows:

[0029] 10, combustion chamber; 110, print head; 120, drive mechanism;

[0030] 20, support table; 210, placement table; 210A, upper support plate; 210B, lower support plate; 211, steering shaft; 212, servo motor; 213, positioning mechanism; 220, movable plate; 221, side column; 222, limit spring; 230, heat exhaust assembly; 240, scraping assembly; 241, reset shaft; 242, torsion spring. Detailed implementation manners

[0031] The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without creative efforts shall fall within the protection scope of the present invention.

[0032] In the description of the present invention, it should be understood that the orientation or positional relationship indicated by the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", etc. is based on the orientation or positional relationship shown in the accompanying drawings, and is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of the present invention.

[0033] Please refer to Figure 1 As shown, an additive deposition industrial mold 3D printer is provided, including a combustion chamber 10 and a support table 20 installed at the bottom end of the combustion chamber 10. Figure 2 As shown, a print head 110 for printing and a drive mechanism 120 for driving the movement of the print head 110 are provided inside the combustion chamber 10. Figure 3 As shown, a placement table 210 for supporting the printed product is provided at the top end of the support table 20, and heat exhaust assemblies 230 for extracting the heat from the finished product area are provided on both sides of the support table 20. The placement table 210 is of an I-shaped structure and includes an upper support plate 210A located in the support area and a lower support plate 210B located in the cleaning area. A steering assembly for driving its flipping is provided on the side of the placement table 210 to adjust the positions of the upper support plate 210A and the lower support plate 210B;

[0034] Adjusting mechanisms 213 are provided on both sides of the bottom end of the placement table 210, and scraping assemblies 240 are adhesively provided on both sides of the bottom end of the lower support plate 210B in the cleaning area. Under the action of the adjusting mechanism 213, the placement table 210 is driven to move longitudinally to cooperate with the print head 110 to complete the printing of finished products;

[0035] The inlet end of the heat exhaust assembly 230 is aligned with the top surface of the upper support plate 210A to extract the heat flow generated in the finished product area. The outlet end of the heat exhaust assembly 230 is aligned with the top surface of the lower support plate 210B to divert the heat flow to the finished product residue area. During the lateral movement, the residue is softened by heat. The bottom end of the lower support plate 210B slides in contact with the scraping assembly 240 to cooperate with the scraping assembly 240 to scrape off the finished product residue adhered to the surface of the lower support plate 210B.

[0036] During specific use, during the printing of finished products, first, the placement table 210 is adjusted to the initial printing position through the adjusting mechanism 213, that is, the central area of the placement table 210. At this time, the upper support plate 210A is horizontally placed on the top area of the placement table 210, and the lower support plate 210B is placed at the bottom position inside the placement table 210. During this process, the raw material is melted by the print head 110, and the melted raw material is ejected through the end nozzle for additive deposition printing. During this process, the driving mechanism 120 adjusts the horizontal and vertical positions of the print head 110 to perform the printing of finished products on the top of the upper support plate 210A.

[0037] After the printing work is completed, the door panel on the side of the combustion chamber 10 is opened, and the residual heat inside the combustion chamber 10 is dissipated by standing still for a period of time. The finished product on the top of the upper support plate 210A is taken out manually. At this time, the bottom area of the finished product will adhere to the bottom position of the upper support plate 210A. To improve the printing efficiency, during the secondary printing process, the placement table 210 is driven to flip through the steering assembly. In this solution, the steering assembly includes a pair of steering shafts 211 and a servo motor 212 coaxially connected to the steering shaft 211. To achieve a balancing effect, the two steering shafts 211 are respectively arranged on both sides of the middle position of the placement table 210. One of the steering shafts 211 is coaxially connected to the servo motor 212, and the bottom end of the servo motor 212 is fixed on the top position of one of the adjusting mechanisms 213. The end of the other steering shaft 211 is rotatably arranged on the top position of the other adjusting mechanism 213, so that the servo motor 212 can drive the placement table 210 to flip through the two steering shafts 211 during startup, so that the upper support plate 210A with adhered finished product residue is flipped to the bottom position inside the placement table 210, and the relatively clean and smooth lower support plate 210B is flipped to the horizontal position on the top of the support table 20. At this time, the placement table 210 is driven by the adjusting mechanism 213 to return to the initial position, and the secondary printing work of finished products is carried out, thus eliminating the need to replace and clean the placement table 210 and improving the printing efficiency.

[0038] During the secondary printing process, the above printing work is repeated to complete the finished product printing process on the top surface of the lower platen 210B. During the printing process, since it is necessary to cooperate with the positioning adjustment mechanism 213 to drive the placement table 210 to move horizontally and adjust the position of the finished product to cooperate with the print head 110 for printing work. Therefore, the scraping assembly 240 is attached to the bottom end of the upper platen 210A. When the upper platen 210A slides horizontally following the positioning adjustment mechanism 213, the side surface of the scraping assembly 240 rubs against the bottom end of the upper platen 210A, scraping off the finished product residue adhered to the bottom end of the upper platen 210A. At the same time, in order to improve the rubbing effect, one end of the scraping assembly 240 close to the placement table 210 is designed as a wedge-shaped structure, and the tip of the wedge-shaped structure fits against the bottom end of the upper platen 210A. When using the tip to scrape the finished product residue, since its contact area becomes smaller, correspondingly, the force generated on the finished product residue will increase, so the rubbing effect will increase, thereby improving the rubbing efficiency.

[0039] During the scraping process of the scraping assembly 240, it is necessary to ensure that the scraping assembly 240 is fully attached to the surface of the upper platen 210A or the lower platen 210B. If there is a gap between the two, it will affect the scraping effect. Therefore, during the design of the scraping assembly 240, Figures 4 - 5 As shown, a return shaft 241 is designed at one end of the scraping assembly 240 away from the placement table 210. Both ends of the return shaft 241 are rotatably connected to a connecting shaft, and a torsion spring 242 is connected between the position where the connecting shaft is rotatably connected to the return shaft 241. During the flipping process of the placement table 210, the downward-flipping upper platen 210A or lower platen 210B will exert pressure on one of the scraping assemblies 240, causing it to flip downward and drive the torsion spring 242 to contract. Subsequently, the upper platen 210A or lower platen 210B contacts the bottom end of the other scraping assembly 240 and drives it to flip upward, and squeezes the torsion spring 242 at this position to contract until both scraping assemblies 240 lose pressure. At this time, under the action of the torsion spring 242, the scraping assembly 240 is driven to reset and return to a parallel state, and respectively fits against the bottom end position of the flipped upper platen 210A or lower platen 210B. It should be noted that the scraping assembly 240 can also be replaced with an elastic metal material, which can return to its original state after being squeezed.

[0040] Due to the need to consider the size of the finished product, if the area occupied by the bottom of the finished product on the top region of the placement table 210 is too small, the adjustment range of the positioning adjustment mechanism 213 will be correspondingly reduced. Therefore, the horizontal movement distance of the placement table 210 will be reduced. At this time, if the initial contact position of the bottom end of the scraping assembly 240 is far from the center position of the bottom end of the placement table 210, it will cause the scraping assembly 240 to be unable to fully scrape the surface of the upper platen 210A or the lower platen 210B. Therefore, in the present invention, Figures 8 - 9As shown in the figure, align the end of the scraping assembly 240 with the middle position at the bottom end of the placement table 210, so that the scraping area formed by the two scraping assemblies 240 can cover the entire surface of the upper support plate 210A or the lower support plate 210B, improving the scraping effect of the scraping assembly 240.

[0041] It should be noted that even if the range of movement of the placement table 210 driven by the position adjustment mechanism 213 is too small, resulting in the area of the upper support plate 210A or the lower support plate 210B adhered with finished product residues not being sufficiently scraped by the scraping assembly 240, when the finished product is formed and static, the driving mechanism 120 is not started at this time, and the position adjustment mechanism 213 is started to drive the placement table 210 to move sufficiently, so as to cooperate with the two scraping assemblies 240 to perform sufficient scraping work.

[0042] During the printing process, it is necessary to extract the waste heat generated in the finished product area through the heat exhaust assembly 230, so that the finished product can be quickly formed. Therefore, in the present invention, Figure 6 As shown in the figure, the heat exhaust assembly 230 is designed in a U-shaped structure. The top end of the heat exhaust assembly 230 is the air inlet end, and the air inlet end is aligned with the top surface of the upper support plate 210A or the lower support plate 210B located in the finished product area, for timely extracting the generated heat flow. The bottom end of the heat exhaust assembly 230 is the air outlet end, and its air outlet end extends into the internal position at the bottom end of the support table 20 and is aligned with the bottom surface of the upper support plate 210A or the lower support plate 210B located in the finished product residue area, guiding the extracted heat flow to the bottom surface of the upper support plate 210A or the lower support plate 210B adhered with finished product residues, making it heat-softened and reducing the adhesion strength with the bottom end of the upper support plate 210A or the lower support plate 210B, thereby improving the scraping effect of the scraping assembly 240 on the finished product residues. As Figure 7 shown in the figure, the direction of the dotted arrow is the direction of heat flow. In this case, the upper support plate 210A holds the finished product, extracts the waste heat generated around the finished product through the heat exhaust assembly 230, and discharges it into the bottom end of the lower support plate 210B through the air outlet end at the bottom, and softens the finished product residues through the waste heat in the heat flow.

[0043] At the same time, in order to prevent heat loss and improve the heat flow utilization effect of recycling, movable plates 220 are arranged on both sides of the supporting platform 20, and the top edge area of the movable plate 220 conflicts with the bottom edge area of the upper support plate 210A or the lower support plate 210B located in the finished product area. Since the cross-section of the placement platform 210 is an I-shaped structure, during the lateral movement of the placement platform 210, the bottom surface of the upper support plate 210A or the lower support plate 210B located in the finished product area will squeeze the movable plate 220 in the sliding direction. In order to enable the movable plate 220 to fill the gap generated during the movement of the placement platform 210 in real time and ensure the sealing effect of the finished product residue area, a pair of side columns 221 are arranged on both sides of the movable plate 220. The movable plate 220 slides along the two side columns 221, and a limit spring 222 is sleeved on the outer side of the side column 221. When the placement platform 210 moves laterally, the movable plate 220 in the sliding direction will be squeezed so that the movable plate 220 at this position The movable plate 220 at the other end slides along the side of the corresponding side column 221 and squeezes the limit spring 222 sleeved on its outer side. The movable plate 220 at the other end loses external squeezing at its top edge area due to the distance between the mounting platform 210 and the mounting platform 210. However, the mounting platform 210 has already squeezed the two movable plates 220 when it is in the initial position. At this time, each limit spring 222 is in a compressed state. Therefore, after moving away from the movable plate 220, the limit spring 222 that loses external pressure will reset and drive the movable plate 220 to move in the opposite direction, toward the moving direction of the mounting platform 210, until it fits at the bottom edge position, and the gap generated by the movement of the mounting platform 210 is filled in real time, so that the residue area remains in a sealed state. At the same time, due to the existence of the limit spring 222, when the mounting platform 210 is flipped, the force applied by the edge can drive the two movable plates 220 to move, forming a gap that allows the mounting platform 210 to flip through, and overcome the pressure formed by the limit spring 222 to complete the flipping action.

[0044] After completing the printing work, continue to stand for a while until the inner end of the combustion chamber 10 is completely pulled out by the scraping component 240 and reaches the finished product removal temperature. At this time, the finished product attached to the top of the upper pallet 210A or the lower pallet 210B is taken out, and the upper pallet 210A or the lower pallet 210B that is used to lift the finished product for the first time has been treated with residual heat and scratches, and the residue attached to its surface has been removed. After flipping, the upper pallet 210A or the lower pallet 210B with the residue attached is replaced with the upper pallet 210A or the lower pallet 210B that has been cleaned, that is, flipped, for the next finished product processing work.

[0045] In the present invention, by designing the placement table 210 into a double-sided structure and performing rotational processing on the support area, it is not necessary to take out the entire support area for cleaning, which improves the printing efficiency. At the same time, during the printing of finished products on one side of the placement table 210, the surface adhering to the residue of the finished product will be in the residue cleaning area. The scraping assembly 240 is used to scrape the surface of the placement table 210 in a moving state to scrape off the adhered residue. During the scraping operation, the heat exhaust assembly 230 is used to divert the waste heat during the printing process to the residue adhesion surface to accelerate the softening efficiency of the residue, cooperate with the scraping assembly 240 to complete further scraping work, improve the scraping effect of the residue, and at the same time make full use of the waste heat to improve the secondary utilization effect of energy.

[0046] The foregoing has shown and described the basic principles, main features, and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited by the above embodiments. The above embodiments and the descriptions in the specification are only preferred examples of the present invention and are not used to limit the present invention. Without departing from the spirit and scope of the present invention, the present invention will have various changes and improvements, and these changes and improvements all fall within the scope of the present invention claimed. The scope of protection of the present invention is defined by the appended claims and their equivalents.

Claims

1. An additive deposition type industrial mold 3D printer, comprising a combustion chamber (10) and a supporting table (20) installed at the bottom end of the combustion chamber (10). A print head (110) for printing and a driving mechanism (120) for driving the movement of the print head (110) are arranged at the inner end of the combustion chamber (10). An installation table (210) for supporting printed products is arranged at the top end of the supporting table (20), and heat exhaust components (230) for extracting heat from the finished product area are arranged on both sides of the supporting table (20). It is characterized in that: The placement table (210) has an I-shaped structure and includes an upper support plate (210A) located in the support area and a lower support plate (210B) located in the cleaning area. A steering component for driving its flipping is provided on the side of the placement table (210) to adjust the positions of the upper support plate (210A) and the lower support plate (210B). Adjusting mechanisms (213) are provided on both sides of the bottom end of the placement table (210), and scraping components (240) are fitted and arranged on both sides of the bottom end of the lower support plate (210B) located in the cleaning area. Under the action of the adjusting mechanisms (213), the placement table (210) is driven to move longitudinally to cooperate with the print head (110) to complete the printing of finished products. The inlet end of the heat exhaust component (230) is aligned with the top surface of the upper support plate (210A) to extract the heat flow generated in the finished product area. The outlet end of the heat exhaust component (230) is aligned with the top surface of the lower support plate (210B) to divert the heat flow to the finished product residue area. During the lateral movement, the residue is softened by heat. The bottom end of the lower support plate (210B) slides in contact with the scraping component (240) to cooperate with the scraping component (240) to scrape the finished product residue adhered to the surface of the lower support plate (210B).

2. The additive deposition type industrial mold 3D printer according to claim 1, wherein: The steering component includes a pair of steering shafts (211) and a servo motor (212) coaxially connected to the steering shafts (211). The two steering shafts (211) are respectively arranged on both sides of the middle position of the placement table (210). One of the steering shafts (211) is coaxially connected to the servo motor (212), and the bottom end of the servo motor (212) is fixed at the top position of one of the adjusting mechanisms (213). The end of the other steering shaft (211) is rotatably arranged at the top position of the other adjusting mechanism (213), so that the servo motor (212) can drive the placement table (210) to flip through the two steering shafts (211) during startup.

3. The additive deposition type industrial mold 3D printer according to claim 2, wherein: The heat exhaust component (230) has a U-shaped structure. The top end of the heat exhaust component (230) is the air inlet end for timely extracting the generated heat flow. The bottom end of the heat exhaust component (230) is the air outlet end for diverting the waste heat to the area adhered with finished product residue.

4. The additive deposition type industrial mold 3D printer according to claim 3, characterized in that: The air inlet end is aligned with the top surface of the placement table (210), and the air outlet end extends into the inner position at the bottom end of the support table (20) and is aligned with the bottom surface of the placement table (210).

5. The additive deposition type industrial mold 3D printer according to claim 4, wherein: On both sides of the supporting table (20), movable plates (220) are provided. The movable plates (220) are slidably connected to the side surfaces of the supporting table (20). The edge area at the top of the movable plates (220) abuts against the edge area at the bottom of the placement table (210) located in the finished product area. A pair of side columns (221) are provided on both sides of the movable plates (220). The movable plates (220) slide along the outer sides of the two side columns (221). A limiting spring (222) is sleeved on the outer side of the side columns (221). By the pressure exerted on the movable plates (220) by the limiting springs (222), the two limiting springs (222) are always in contact with the edge area at the top of the placement table (210) during the movement.

6. The additive deposition type industrial mold 3D printer according to claim 5, characterized in that: One end of the scraping assembly (240) close to the placement table (210) is provided with a wedge-shaped structure, and the tip of the wedge-shaped structure is in contact with the bottom end position of the placement table (210).

7. The additive deposition type industrial mold 3D printer according to claim 6, wherein: One end of the scraping assembly (240) away from the placement table (210) is provided with a reset shaft (241). Both ends of the reset shaft (241) are rotatably connected to connecting shafts. A torsion spring (242) is connected between the positions where the connecting shafts are rotatably connected to the reset shaft (241). By the torsion spring (242), the horizontal state of the scraping assembly (240) before and after flipping is maintained, so that it fits against the bottom end of the placement table (210) after flipping and staying stationary.

8. The additive deposition type industrial mold 3D printer according to claim 7, characterized in that: The ends of the two scraping assemblies (240) are both aligned with the middle position at the bottom end of the placement table (210), so that the scraping areas formed by the two scraping assemblies (240) can cover the entire area at the bottom end of (210).

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