Demoulding device for sintered sheet

Abstract

The utility model discloses a demolding device of a sintered sheet, a mold of the sintered sheet comprises a core mold, a middle mold and an outer mold which are sequentially nested from inside to outside, and the sintered sheet is positioned in the middle mold. The demolding device comprises a demolding base assembly which comprises a first demolding base and a second demolding base which are arranged in a stacked mode; the first demolding base is used for bearing the mold, the first demolding base is provided with a first demolding hole matched with the outer size of the middle mold, and the second demolding base is provided with a second demolding hole matched with the outer size of the core mold; the ejector rod assembly comprises a first ejector rod matched with the inner size of the first demolding hole and a second ejector rod matched with the inner size of the second demolding hole; the first ejector rod is used for ejecting a core mold and a middle mold in the mold into the first demolding hole, and the second ejector rod is used for ejecting the core mold in the first demolding hole into the second demolding hole. The demolding device has the advantage that the yield of sintered sheets in the demolding process can be improved.

Description

Technical Field

[0001] The utility model belongs to the technical field of refrigeration, in particular to a demoulding device for a sintered sheet. Background Art

[0002] Heat exchange is a common method in existing refrigeration technologies. To achieve greater cooling capacity, increasing the heat exchange area is a common approach. To maximize heat exchange within the smallest possible space, existing technologies employ the placement of sintered sheets within components where increased heat exchange space is required. These sheets have a rough surface and numerous tiny pores and channels. These rough surfaces and abundant pores significantly increase the actual area in contact with the fluid, thereby achieving greater heat exchange within a smaller space.

[0003] However, since the sintered sheet has a rough surface and abundant pores inside, it is very easy to break when subjected to uneven force compared to a complete metal block. Therefore, when removing the mold for preparing the sintered sheet, how to improve the yield of the sintered sheet is a technical problem that needs to be solved. Utility Model Content

[0004] The purpose of the utility model is to improve the yield rate of sintered sheets.

[0005] In order to achieve the above objectives, this application provides the following technical solutions:

[0006] A demoulding device for a sintered sheet, wherein the mold of the sintered sheet comprises a core mold, a middle mold, and an outer mold which are nested in sequence from the inside out, the sintered sheet is located in the middle mold, and the demoulding device comprises:

[0007] The demoulding base assembly includes a first demoulding base and a second demoulding base arranged in a stacked manner; the first demoulding base is used to support the mold, the first demoulding base is provided with a first demoulding hole matching the outer size of the middle mold, and the second demoulding base is provided with a second demoulding hole matching the outer size of the core mold;

[0008] The ejector rod assembly includes a first ejector rod matching the inner size of the first demolding hole and a second ejector rod matching the inner size of the second demolding hole; the first ejector rod is used to push the core mold and the middle mold in the mold into the first demolding hole, and the second ejector rod is used to push the core mold in the first demolding hole into the second demolding hole.

[0009] In one embodiment, a positioning cover is further included to cover the mold, and a positioning hole matching the outer size of the first ejector pin is provided on the positioning cover.

[0010] In one embodiment, a first positioning protrusion is provided on the periphery of the positioning cover, and a second positioning protrusion is provided on the periphery of the first demoulding base. The first positioning protrusion and the second positioning protrusion are used to position the side wall of the outer mold.

[0011] In one embodiment, the demoulding base assembly further includes a positioning assembly for preventing the first demoulding base and the second demoulding base from being misaligned with each other.

[0012] In one embodiment, the positioning component is a third positioning protrusion located on the edge of the second demoulding base, and the third positioning protrusion is used to position the lower end side wall of the first demoulding base;

[0013] or;

[0014] The positioning component is a fourth positioning protrusion located on the edge of the first demoulding base, and the fourth positioning protrusion is used to position the upper end side wall of the second demoulding base.

[0015] In one embodiment, the positioning assembly includes a positioning groove and a positioning pin for engaging with the positioning groove, and the positioning pin and the positioning groove are respectively provided on the first demoulding base and the second demoulding base.

[0016] In one embodiment, the height of the first ejector pin and the second ejector pin are both greater than the thickness of the mold.

[0017] In one embodiment, the end surfaces of the first push rod and the second push rod are connected to form a step shape.

[0018] In one embodiment, the first ejector pin and the second ejector pin are respectively fixed above the first station and the second station, and the demoulding base assembly moves from the first station to the second station.

[0019] In one embodiment, the first push rod is provided with a sliding hole, and the second push rod is slidably disposed in the sliding hole.

[0020] The beneficial effects of the present invention are:

[0021] (1) The present application sets a stacked first demoulding base and a second demoulding base, so that the sintered sheet does not need two sets of independently set molds when it is separated from the core mold and the outer mold. Therefore, the sintered sheet does not need to be replaced in the corresponding two sets of molds when it is separated from the core mold and the outer mold. By reducing the replacement operation of the sintered sheet, the yield rate of the sintered sheet can be improved. In addition, the first demoulding hole matches the outer size of the middle mold, and the first ejector pin matches the inner size of the first demoulding hole, so that during the separation process of the outer mold and the middle mold, the sintered sheet located in the middle mold is uniformly stressed as a whole. Similarly, the second demoulding hole matches the outer size of the core mold, and the second ejector pin matches the inner size of the second demoulding hole, so that the point of action during the separation process of the middle mold and the core mold is on the core mold, so the middle mold is almost not subjected to stress. In summary, the demoulding device can improve the yield rate of the sintered sheet during the demoulding process.

[0022] (2) The positioning cover provided in the present application can prevent the outer mold from being deformed when the first push rod acts on the middle mold and the core mold, causing the middle mold and the outer mold to deviate from each other, thereby avoiding damage to the sintered sheet due to the deviation.

[0023] (3) In the present application, the first positioning protrusion and the second positioning protrusion can position the positioning cover, the mold and the first demolding base, and can ensure that the positioning cover, the mold and the first demolding base are positioned when the ejector assembly acts on the mold, and the ejector assembly will not directly act on the middle mold due to misalignment during operation, thereby damaging the sintered sheet.

[0024] (4) The positioning assembly in the present application can position the first demoulding base and the second demoulding base to prevent the first demoulding base and the second demoulding base from being offset relative to each other.

[0025] (5) In the present application, the heights of the first push rod and the second push rod are both greater than the thickness of the mold. When the mold is manually demolded, the first push rod and the second push rod are ensured to be able to pass through the mold. When the push rod is mechanically driven, the push rod height is greater than the mold height to prevent the thinner push rod from shaking when moving to the sintering sheet position when the machine shakes slightly, thereby preventing the structure of the sintering sheet from being damaged.

[0026] (6) The present application discloses three structural schemes of the ejector assembly. The first scheme is based on manual demoulding. When the first ejector is used for demoulding, the second ejector can be operated as a handle. Similarly, when the second ejector is used for demoulding, the first ejector can be operated as a handle. In the second scheme, the first ejector and the second ejector are set at different workstations. By moving the demoulding base assembly to the designated workstation, the error of the two demoulding processes can be better reduced. In the third scheme, during manual and mechanical operations, the first ejector not only limits the second ejector by means of a sliding hole, but also serves as a positioning cover when demoulding the core mold. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] Figure 1A schematic structural diagram of a demoulding device for a sintered sheet provided in an embodiment of the present utility model;

[0028] Figure 2 An exploded view of a demoulding device for a sintered sheet provided in an embodiment of the present utility model;

[0029] Figure 3 A three-dimensional diagram of a positioning cover in a demoulding device provided in an embodiment of the present utility model.

[0030] The attached diagram:

[0031] 11. First ejector pin; 12. Second ejector pin; 21. First demoulding base; 211. First demoulding hole; 212. Second positioning protrusion; 22. Second demoulding base; 221. Second demoulding hole; 222. Third positioning protrusion; 3. Positioning cover; 31. Positioning hole; 32. First positioning protrusion; 4. Mold; 41. Core mold; 42. C-shaped upper mold; 43. Notch mold; 44. Outer mold. DETAILED DESCRIPTION

[0032] In order to enable those skilled in the art to better understand the technical solutions in this application, the technical solutions in the embodiments of this application will be clearly and completely described below in conjunction with the drawings in the embodiments of this application. Obviously, the described embodiments are only part of the embodiments of this application, not all of the embodiments. Based on the embodiments in this application, all other embodiments obtained by ordinary technicians in this field without making creative work should fall within the scope of protection of this application. The embodiments described below with reference to the drawings are exemplary and are only used to explain this application, and cannot be interpreted as limiting this application.

[0033] In the description of the present invention, it should be understood that the terms "center", "up", "down", "left", "right", etc., indicating directions or positional relationships, are based on the directions or positional relationships shown in the accompanying drawings, and are 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 direction, be constructed and operated in a specific direction, and therefore cannot be understood as a limitation on the present invention.

[0034] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the quantity of the technical features being referred to. Thus, a feature specified as "first" or "second" may explicitly or implicitly include one or more of such features. In the description of this utility model, "plurality" means at least two, such as two, three, etc., unless otherwise specifically defined.

[0035] In the field of refrigeration, heat exchange technology is a more commonly used method. In order to increase the heat exchange effect in a limited space, sintered plate heat exchange is used in the existing technology. The principle of sintered plate heat exchange is: based on the rough surface of the sintered plate and the numerous tiny pores and channels, the actual area of ​​the fluid is increased.

[0036] The steps for making sintered sheets are: placing metal powder in a mold, extruding it into a sheet-like structure, and then sintering the mold holding the sheet-like metal powder. After sintering, the sheet-like metal powder becomes a sintered sheet. Because sintered sheets have numerous tiny gaps and channels, the challenge of removing the sheet from the mold after sintering to ensure a high yield is a challenge.

[0037] Since the shape of the sintered sheet is constrained by the shape of the heat exchange channel in the heat exchange part, the shape of the sintered sheet is not fixed. Here, the heat exchange channel is annular or circular as an example, wherein the corresponding sintered sheet is a C-shaped structure or an annular structure.

[0038] For sintering C-shaped or ring-shaped sintered sheets, such as Figure 1-2 As shown: The embodiment of the present application discloses a demoulding device for a sintered sheet. The mold of the sintered sheet includes a core mold 41, a middle mold, and an outer mold 44 which are nested in sequence from the inside to the outside. The sintered sheet is located in the middle mold. The demoulding device includes:

[0039] The demoulding base assembly includes a first demoulding base 21 and a second demoulding base 22 arranged in a stacked manner; the first demoulding base 21 is used to support the mold 4, and the first demoulding base 21 is provided with a first demoulding hole 211 that matches the outer size of the middle mold, and the second demoulding base 22 is provided with a second demoulding hole 221 that matches the outer size of the core mold 41;

[0040] The ejector rod assembly includes a first ejector rod 11 that matches the inner size of the first demolding hole 211 and a second ejector rod 12 that matches the inner size of the second demolding hole 221; the first ejector rod 11 is used to push the core mold 41 and the middle mold in the mold 4 into the first demolding hole 211, and the second ejector rod 12 is used to push the core mold 41 in the first demolding hole 211 into the second demolding hole 221.

[0041] The demolding process is as follows: the mold carrying the sintered sheet is placed on the first demolding base 21. The first ejector pin 11 acts on the core mold 41 and the middle mold from above the mold until the middle mold and the outer mold 44 separate. The core mold 41 and the middle mold are pushed into the first demolding hole 211 by the first ejector pin 11. Then, the second ejector pin 12 acts on the core mold 41 until the middle mold and the core mold 41 separate and the core mold 41 is pushed into the second demolding hole. The middle mold is removed from the first demolding hole 211. Without the support of the core mold 41 and the outer mold 44, the middle mold structure easily falls apart, and the sintered sheet in the middle mold can be removed. This solution, by providing a stacked first demolding base 21 and a second demolding base 22, allows the sintered sheet to be separated from the core mold 41 and the outer mold 44 without having to separate from the two sets of molds. Therefore, the sintered sheet does not need to be replaced between the two sets of molds, thereby reducing the probability of sintered sheet damage caused by the replacement operation. In addition, the first demolding hole 211 matches the outer size of the middle mold, and the first ejector pin 11 matches the inner size of the first demolding hole 211, so that during the separation process of the outer mold 44 from the middle mold, the sintered sheet located in the middle mold is uniformly stressed as a whole. Similarly, the second demolding hole 221 matches the outer size of the core mold 41, and the second ejector pin 12 matches the inner size of the second demolding hole 221, so that during the separation process of the middle mold and the core mold 41, the action point is on the core mold 41, and the second demolding base 22 supports the bottom of the middle mold, so that the core mold 41 and the middle mold can be separated smoothly, thereby ensuring the demolding success rate of the core mold 41 and the middle mold. In summary, the demolding device can improve the yield rate of the sintered sheet during the demolding process.

[0042] In addition, the core mold 41, the middle mold and the outer mold 44 described in the present application are nested in sequence from the inside to the outside, so the central axis of the core mold 41 may coincide with the central axis of the middle mold, or it may deviate from the central axis of the middle mold. Similarly, the central axis of the middle mold may coincide with the central axis of the outer mold 44, or it may deviate from the central axis of the outer mold 44; the central axis of the core mold 41 may coincide with the central axis of the outer mold 44, or it may deviate from the central axis of the outer mold 44. The specific position is determined according to the required shape of the sintered sheet.

[0043] In one embodiment, the core mold 41, the middle mold and the outer mold 44 are coaxially arranged in sequence from the inside to the outside. When this embodiment is to prepare a C-shaped sintered sheet, the middle mold includes a C-shaped upper mold 42, a C-shaped lower mold (not shown in the figure) and a notch mold 434. The C-shaped upper mold 42 and the C-shaped lower mold are respectively located on the upper and lower sides of the sintered sheet, and the notch mold 434 matches the notch of the C-shaped structure. The shape of the sintered sheet is determined by the space between the C-shaped upper mold 42 and the C-shaped lower mold. The notch mold 434 is used to shape the end of the sintered sheet and prevent powder from flowing out from between the C-shaped upper mold 42 and the C-shaped lower mold.

[0044] The present application also discloses another embodiment, in which the demoulding device further includes a positioning cover 3 covering the mold 4, and the positioning cover 3 is further provided with a positioning hole 31 that matches the outer size of the first ejector 11. Since the ejector assembly is in the process of demoulding the mold 4, there is a possibility of deviation in the action position, and secondly, there is partial deformation when the ejector assembly acts on the mold. For example, when demoulding the outer mold 44, the position of the outer mold 44 close to the middle mold will be depressed downward to a certain extent due to adhesion, resulting in that during the demoulding process, the middle mold and the lower half of the outer mold 44 are not completely cut along the shape of the ejector, which may be due to the extrusion of the upper end causing the lower end to tear at the same time, and the tearing causes unclear edges, resulting in poor demoulding effect. In this embodiment, the positioning hole 31 on the positioning cover 3 matches the size of the first push rod 11, so that both the first push rod 11 and the second push rod 12 can pass through. In addition, the part of the positioning cover 3 outside the positioning hole 31 applies uniform pressure to the outer mold 44, and the direction of the pressure is opposite to the direction of the supporting force of the first demolding base 21 supporting the outer mold 44, which is equivalent to a uniform opposite force on the entire surface of the two ends of the outer mold 44, thereby minimizing the deformation of the outer mold 44. When the first push rod 11 is limited in the positioning hole 31, the most accurate action point of the first push rod 11 can be constrained, thereby better realizing the separation of the outer mold 44 and the middle mold, and reducing the probability of damage to the sintered sheet caused by the separation of the outer mold 44 and the middle mold.

[0045] This application also discloses another embodiment, such as Figure 3 As shown, the periphery of the positioning cover 3 is provided with a first positioning protrusion 32, and the periphery of the first demolding base 21 is provided with a second positioning protrusion 212. The first positioning protrusion 32 and the second positioning protrusion 212 are used to position the side wall of the outer mold 44. When the mold 4 is demolded, the relative position between the mold 4 and the demolding device is crucial. When the mold 4 and the demolding device are misaligned, the position of the ejector rod is likely to directly act on part of the middle mold, and under the action of pressure, it directly causes the sintered sheet to rupture. In this embodiment, by providing the first positioning protrusion 32 and the second positioning protrusion 212, the mold 4 can be fixed between the first positioning protrusion 32 and the second positioning protrusion 212, thereby constraining the relative position between the mold 4 and the demolding device.

[0046] The present application also discloses another embodiment, wherein the demoulding base assembly further comprises a positioning assembly for preventing the first demoulding base 21 and the second demoulding base 22 from being misaligned with each other. The positioning assembly in the present application can position the first demoulding base 21 and the second demoulding base 22 to prevent the first demoulding base 21 and the second demoulding base 22 from being offset.

[0047] like Figure 2As shown, the present application discloses one embodiment of the positioning component, which is a third positioning protrusion 222 located on the edge of the second demoulding base 22, and the third positioning protrusion 222 is used to position the lower end side wall of the first demoulding base 21.

[0048] The present application discloses another embodiment of the positioning component, which is a fourth positioning protrusion (not shown in the figure) located on the edge of the first demoulding base 21. The fourth positioning protrusion is used to position the upper end side wall of the second demoulding base 22.

[0049] In the above two solutions, one demoulding base is selected from the demoulding base assembly to position the other demoulding base, so that there is no misalignment between the two demoulding bases.

[0050] In another embodiment, the first demoulding base 21 and the second demoulding base 22 are connected by threads. In detail, an edge protrusion is provided on the first demoulding base 21 or the second demoulding base 22, and the inner side wall of the edge protrusion is provided with a first thread, and the outer side wall of the other demoulding base is directly provided with a second thread, and the first thread is matched with the second thread.

[0051] The above four implementation cases are all applicable to the mold 4 in which the core mold 41, the middle mold and the outer mold 44 are coaxially arranged in sequence from the inside to the outside.

[0052] When the core mold 41, the middle mold and the outer mold 44 are not coaxially arranged in sequence from the inside to the outside, the present application also discloses the following technical solution: the positioning assembly includes a positioning groove and a positioning pin for engaging with the positioning groove, and the positioning pin and the positioning groove are respectively arranged on the first demoulding base 21 and the second demoulding base 22. It should be noted that when the positioning pin is set on the first demoulding base 21, the positioning groove is set on the second demoulding base 22. Similarly, when the positioning pin is set on the second demoulding base 22, the positioning groove is set on the first demoulding base 21. The matching arrangement of the positioning groove and the positioning pin can limit the first demoulding base 21 and the second demoulding base 22 to a unique relative position. This solution is also applicable to the mold 4 in which the core mold 41, the middle mold and the outer mold 44 are coaxially arranged in sequence from the inside to the outside.

[0053] The present application also discloses another embodiment, in which the height of the first ejector pin 11 and the second ejector pin 12 are both greater than the thickness of the mold 4. In this solution, when the demolding is performed manually, the height of the first ejector pin 11 and the second ejector pin 12 is greater than the thickness of the mold 4 to ensure that the ejector pins can pass through the mold 4. This solution is based on the condition that there is no connection structure above the first ejector pin 11 and the second ejector pin 12, and it can still ensure that the ejector pin assembly can be demolded. When the ejector pins are mechanically driven, the height of the first ejector pin 11 and the second ejector pin 12 is greater than the height of the mold 4 to prevent the thinner ejector pins from damaging the structure of the sintered sheet when the machine shakes slightly and is located at the sintered sheet position.

[0054] The present application also discloses another embodiment in which the end faces of the first push rod 11 and the second push rod 12 are connected to form a step-like shape. In this embodiment, when the first push rod 11 is required to act on the mold 4 to remove the outer mold 44, the second push rod 12 serves as a handle for the first push rod 11. Similarly, when the second push rod 12 is required to act on the mold 4 to remove the core mold 41, the first push rod 11 serves as a handle for the second push rod 12. Optionally, the central axes of the first push rod 11 and the second push rod 12 coincide, making the push rod assembly easier to process.

[0055] Regarding the ejector assembly, the present application also discloses another embodiment, in which the first ejector 11 and the second ejector 12 are respectively fixed above the first station and the second station, and the demoulding base assembly moves from the first station to the second station. In this solution, by setting the first ejector 11 and the second ejector 12 above different stations, and then moving the demoulding base assembly from the first station to the second station, it can be ensured that the mold 4 above the demoulding base assembly is opposite to the first ejector 11 at the first station, and the first ejector 11 is facing the middle mold and the core mold 41 when moving toward the mold 4; in the second station, it can be ensured that the second ejector 12 is facing the core mold 41. By setting the first station and the second station, the error of the two demoulding processes can also be better reduced. The present application constrains the demoulding base assembly to move from the first station to the second station, thereby determining that the process does not first remove the outer mold 44 and then the core mold, so as to ensure that the core mold and the middle mold are still in an integral state after the outer mold 44 is removed. In addition, the core mold and the middle mold are located in the first demoulding hole 211, and the outer side wall of the first demoulding hole 211 replaces the outer side wall structure of the outer mold 44 to constrain the middle mold, thereby preventing the middle mold and the core mold 41 from falling apart. If the core mold 41 is removed first, the middle part of the C-type upper mold 42, the C-type lower mold (not shown in the figure) and the notch mold 434 has no structural support, so the middle mold and the outer mold 44 may fall apart. The falling apart mold represents that the mold part has been displaced, which is more likely to cause damage to the sintered sheet during the next demoulding. Through the above analysis, the present application can effectively reduce the probability of damage to the sintered sheet by moving from the first station to the second station, thereby improving the yield rate of the sintered sheet.

[0056] Regarding the ejector pin assembly, this application also discloses another embodiment in which the first ejector pin 11 is provided with a sliding hole, and the second ejector pin 12 is slidably disposed within the sliding hole. In this embodiment, the first ejector pin 11 is sleeved onto the second ejector pin 12. During manual and mechanical operation, the first ejector pin 11 limits the position of the second ejector pin 12 through the sliding hole. The bottom surface of the first ejector pin 11 also serves as a positioning cover when removing the core mold 41.

[0057] Based on the above-mentioned demolding device, the damage to the sintered sheets caused by demolding can be minimized, thereby improving the yield of the sintered sheets. In addition, the setting method of the complete set of demolding devices effectively improves the demolding efficiency compared to the process of using multiple sets of demolding devices and operating in different demolding devices.

[0058] Throughout this specification, references to terms such as "some embodiments" or "examples" indicate that the specific features, structures, materials, or characteristics described in conjunction with such embodiments or examples are included in at least one embodiment or example of the present invention. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments. Furthermore, those skilled in the art may combine and reconcile the different embodiments or examples described in this specification.

[0059] The above description is merely a preferred embodiment of the present invention and does not limit the present invention in any way. Any person skilled in the art who, without departing from the scope of the present invention, makes any equivalent substitution, modification, or other variation to the technical solution and technical content disclosed herein shall be deemed to fall within the scope of the present invention and remain within the scope of protection of the present invention.

Claims

1. A demoulding device for a sintered sheet, wherein the mold of the sintered sheet comprises a core mold, a middle mold, and an outer mold which are nested in sequence from the inside to the outside, and the sintered sheet is located in the middle mold, characterized in that: The demoulding device includes: The demoulding base assembly comprises a first demoulding base and a second demoulding base which are stacked; the first demoulding base is used to support the mold, the first demoulding base is provided with a first demoulding hole which matches the outer size of the middle mold, and the second demoulding base is provided with a second demoulding hole which matches the outer size of the core mold; The ejector rod assembly includes a first ejector rod matching the inner size of the first demolding hole and a second ejector rod matching the inner size of the second demolding hole; the first ejector rod is used to push the core mold and the middle mold in the mold into the first demolding hole, and the second ejector rod is used to push the core mold in the first demolding hole into the second demolding hole.

2. A demoulding device for a sintered sheet according to claim 1, characterized in that: It also includes a positioning cover covering the mold, and the positioning cover is also provided with a positioning hole matching the outer size of the first ejector rod.

3. A demoulding device for a sintered sheet as claimed in claim 2, characterized in that: A first positioning protrusion is provided on the periphery of the positioning cover, and a second positioning protrusion is provided on the periphery of the first demoulding base. The first positioning protrusion and the second positioning protrusion are used to position the side wall of the outer mold.

4. A demoulding device for a sintered sheet according to any one of claims 1 to 3, characterized in that: The demoulding base assembly also includes a positioning assembly for preventing the first demoulding base and the second demoulding base from being misaligned with each other.

5. A demoulding device for a sintered sheet as claimed in claim 4, characterized in that: The positioning component is a third positioning protrusion located on the edge of the second demoulding base, and the third positioning protrusion is used to position the lower end side wall of the first demoulding base; or; The positioning component is a fourth positioning protrusion located on the edge of the first demoulding base, and the fourth positioning protrusion is used to position the upper end side wall of the second demoulding base.

6. A demoulding device for a sintered sheet as claimed in claim 4, characterized in that: The positioning assembly comprises a positioning groove and a positioning pin for engaging with the positioning groove, and the positioning pin and the positioning groove are respectively arranged on the first demoulding base and the second demoulding base.

7. A demoulding device for a sintered sheet as claimed in claim 1, characterized in that: The heights of the first push rod and the second push rod are both greater than the thickness of the mold.

8. A demoulding device for a sintered sheet as claimed in claim 1, characterized in that: The end surfaces of the first push rod and the second push rod are connected to form a step shape.

9. A demoulding device for a sintered sheet as claimed in claim 1, characterized in that: The first ejector rod and the second ejector rod are respectively fixed above the first station and the second station, and the demoulding base assembly moves from the first station to the second station.

10. A demoulding device for a sintered sheet according to claim 1, characterized in that: The first push rod is provided with a sliding hole, and the second push rod is slidably arranged in the sliding hole.

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