A metal casting mold that allows for quick demolding and prevents sticking.

Abstract

This utility model relates to the field of metal casting mold technology, specifically disclosing a metal casting mold that enables rapid demolding and prevents sticking, including a support frame, a bracket, a lower mold base, and an upper mold base. The lower mold base has a forming groove, a countersunk hole at the bottom, and an internal ejector rod. The upper mold base is linked to the ejector rod via an insert rod. An anti-stick coating is applied to the inner wall of the forming groove and the surface of the stamping block. The countersunk hole is connected to an air system to assist demolding, and a swing arm striking mechanism shakes off residual debris. This utility model, through the combination of mechanical pushing, air gap assistance, and an anti-stick coating, significantly improves demolding efficiency and casting quality, making it suitable for the efficient production of metal castings.

Description

Technical Field

[0001] This utility model relates to the field of metal casting mold technology, specifically a metal casting mold that allows for quick demolding and prevents sticking. Background Technology

[0002] In the field of metal casting, the demolding efficiency and anti-sticking performance of molds are key factors affecting production efficiency and casting quality. Traditional molds have the following problems: low demolding efficiency: castings tend to stick to the mold after forming, requiring manual demolding, which is time-consuming and labor-intensive; frequent sticking: the strong adhesion between the molten metal and the mold surface after cooling leads to damage to the casting surface or mold wear; high maintenance costs: sticking residue requires frequent mold cleaning, affecting production continuity.

[0003] Chinese patent CN217252130U discloses a hydraulic casting mold for rapid demolding, comprising a mold frame, a lower mold base, and an upper mold base. The lower and upper mold bases are arranged sequentially from bottom to top within the mold frame. A forming groove penetrating the upper and lower surfaces is opened in the middle of the lower mold base. A demolding ejector plate is provided at the upper end of the forming groove. A spring-loaded assembly is provided below the lower mold base to drive the demolding ejector plate to move up and down. A stamping block corresponding to the upper and lower forming groove is fixed in the middle of the lower end of the upper mold base. Insert rods are welded to both sides of the lower end of the upper mold base. This invention facilitates the movement of the ejector rod and demolding ejector plate within the forming groove by lowering the top plate. After the casting is stamped in the forming groove, the return spring force pushes the top plate, ejector rod, and demolding ejector plate upwards. The demolding ejector plate then quickly ejects the formed casting from the forming groove, thus achieving rapid demolding and ensuring the mold's demolding efficiency. However, the above technical solution still does not solve the problem of mold sticking. Therefore, there is an urgent need for a composite mold structure that integrates mechanical pushing, air gap assistance, and surface anti-sticking. Utility Model Content

[0004] To solve the above problems, the present invention adopts the following technical solution.

[0005] A metal casting mold with rapid demolding and anti-sticking properties includes: a support frame comprising a top plate and a base, wherein several guide rods are vertically arranged between the base plate and the base, and a telescopic mechanism is provided at the bottom end of the top plate; a bracket fixedly disposed in the middle of the upper surface of the base; a lower mold base fixedly disposed at the top end of the bracket, wherein a forming groove is provided in the lower mold base, and several countersunk holes are provided through the bottom of the lower mold base, wherein sealing plugs are provided in the countersunk holes; an upper mold base slidably disposed on the guide rods and located above the lower mold base, wherein a stamping block is provided on the bottom surface of the upper mold base, and several insert rods are also provided on the side of the bottom surface of the upper mold base, wherein mounting plates are provided at the bottom ends of the insert rods, and ejector rods are provided on the upper surface of the mounting plates corresponding to the countersunk holes, wherein the ejector rods slide within the countersunk holes; the inner wall of the forming groove and the surface of the stamping block are provided with an anti-sticking coating.

[0006] Preferably, the side of the lower mold base is provided with a through hole corresponding to the insertion rod, and the insertion rod slides in the through hole.

[0007] Preferably, the top rod sidewall is provided with several sealing rings, and the outer side of the sealing rings is in close contact with the countersunk hole sidewall.

[0008] Preferably, the inner wall of the countersunk hole top is provided with a vent hole, and several vent holes are connected to an air inlet pipe, which is connected to a booster pump.

[0009] Preferably, a sealing gasket is provided on the contact surface between the sealing plug and the countersunk hole.

[0010] Preferably, the lower mold base has a plurality of mounting cavities connected to the through holes along the extension direction of the through holes. Each cavity is rotatably equipped with a swing arm, one end of which points to the through hole, and the bottom of the other end of the swing arm is equipped with a hammer. A protrusion is provided in the mounting cavity below the hammer. A toothed plate is provided on the side of the insertion rod facing the mounting cavity, and the toothed plate is engaged with the swing arm.

[0011] Preferably, a spring is provided between the upper part of the inward-facing end of the swing arm and the top wall of the mounting cavity.

[0012] Compared with the prior art, the beneficial effects of this utility model are as follows: This invention achieves dual demolding through mechanical pushing and air film assistance by linking the push rod with the booster air pump. Compared with traditional mold demolding, it reduces the time required and improves work efficiency, and avoids deformation or damage to castings caused by brute force demolding.

[0013] The non-stick coating on the surface of the forming groove and the stamping block, combined with the air gap isolation effect of the vent holes, makes the casting easier to demold, while reducing mold wear and extending service life.

[0014] During the upward movement of the insertion rod, when the swing arm disengages from the toothed plate, it strikes the protrusion, thereby causing vibration and facilitating demolding. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of the overall structure of this utility model; Figure 2 for Figure 1 Schematic diagram of a partial structure at point A in the middle; Figure 3 for Figure 1 A schematic diagram of the partial structure at point B in the middle.

[0016] In the diagram: 1a, top plate; 1b, base; 2, guide rod; 3, telescopic mechanism; 4, bracket; 5, lower mold base; 6, forming groove; 7, countersunk hole; 8, sealing plug; 9, upper mold base; 10, stamping block; 11, insert rod; 12, mounting plate; 13, ejector rod; 15, through hole; 16, sealing ring; 17, vent hole; 18, air inlet pipe; 19, booster pump; 20, sealing gasket; 21, mounting cavity; 22, swing arm; 23, hammer; 24, protrusion; 25, toothed plate; 26, spring. Detailed Implementation

[0017] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present utility model. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. All other embodiments obtained by those skilled in the art based on the embodiments of the present utility model without creative effort are within the protection scope of the present utility model.

[0018] In the description of this utility model, it should be noted that the terms "upper," "lower," "inner," "outer," "top / bottom," etc., indicating the orientation or positional relationship are based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model. Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0019] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installed," "equipped with," "sleeved / connected," "connected," etc., should be interpreted broadly. For example, "connection" can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium; it can be a connection within two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances. Example

[0020] like Figure 1-3 As shown, in this embodiment, a metal casting mold that can be quickly demolded and prevents sticking includes a support frame, which includes a top plate 1a and a base 1b, which are vertically connected by several guide rods 2. A telescopic mechanism 3 is provided at the bottom of the top plate 1a, which is a hydraulic cylinder in this embodiment, for driving the upper mold base to move up and down. A bracket 4 is fixed in the middle of the base 1b for supporting the lower mold base 5.

[0021] In this embodiment, a forming groove 6 is formed inside the lower mold base 5 to accommodate and form the metal blank; several countersunk holes 7 are provided through the bottom of the forming groove 6, and sealing plugs 8 are provided in the holes to seal the upper end of the countersunk holes.

[0022] In this embodiment, the upper mold base 9 is slidably sleeved on the guide rod 2 and located above the lower mold base 5; a stamping block 10 is provided in the middle of the bottom surface of the upper mold base 9, which corresponds vertically to the forming groove 6 and is used to stamp metal blanks; a plurality of insert rods 11 are provided on the side of the bottom surface of the upper mold base 9, and a mounting plate 12 is connected to the bottom end of the plurality of insert rods 11. The top end of the mounting plate 12 is connected to the top rod 13, and the top rod 13 extends into the countersunk hole 7 and can slide up and down.

[0023] In this embodiment, a through hole 15 is provided on the side of the lower mold base 5 corresponding to the upper mold base insertion rod 11, so that the insertion rod 11 can slide through.

[0024] In this embodiment, the inner wall of the forming groove 6 and the surface of the stamping block 10 are coated with an anti-stick coating 14, such as Teflon, molybdenum disulfide or silicon nitride coating.

[0025] In this embodiment, a sealing ring 16 is provided on the side wall of the push rod 13, which is in close contact with the inner wall of the countersunk hole 7 to prevent molten metal from seeping into the countersunk hole; a sealing gasket 20 is provided on the contact surface between the sealing plug 8 and the countersunk hole 7 to further improve the sealing performance.

[0026] In this embodiment, the inner wall of the top of the countersunk hole 7 is provided with a vent hole 17, and a plurality of vent holes 17 are connected to an air inlet pipe 18, which is connected to a booster pump 19.

[0027] In this embodiment, the lower mold base 5 is provided with a plurality of mounting cavities 21 that communicate with the through hole 15 along the extension direction of the through hole 15. The mounting cavity 21 is rotatably provided with a swing arm 22, one end of the swing arm 22 pointing to the through hole 15, and the bottom of the other end of the swing arm 22 is provided with a hammer 23. The mounting cavity 21 is provided with a protrusion 24 located below the hammer 23. The insertion rod 11 is provided with a toothed plate 25 on the side facing the mounting cavity 21, and the toothed plate 25 is engaged with the swing arm 22.

[0028] In this embodiment, a spring 26 is provided between the upper part of the inward-facing end of the swing arm 22 and the inner top wall of the mounting cavity 21.

[0029] The working principle and beneficial effects of the above technical solution are as follows: During stamping, the telescopic mechanism 3 drives the upper die base 9 to move down along the guide rod 2, and the stamping block 10 enters the forming groove 6 to stamp the metal blank.

[0030] After stamping is completed, the telescopic mechanism 3 drives the upper mold base 9 to move upward, the insert rod 11 rises synchronously, and the toothed plate 25 also moves upward synchronously. When the drive swing arm 22 disengages from the toothed plate 25, the hammer 23 strikes the protrusion and loosens the casting. At the same time, the booster air pump 19 injects compressed air into the bottom of the forming groove 6 through the vent hole 17. The ejector rod 13 pushes open the sealing plug, and the compressed air forms an air film to assist the ejector rod 13 in quickly ejecting the casting. The above are merely preferred embodiments of this utility model; however, the scope of protection of this utility model is not limited thereto. Any equivalent substitutions or modifications made by those skilled in the art within the scope of the technology disclosed in this utility model, based on the technical solution and its improved concept, should be included within the scope of protection of this utility model.

Claims

1. A metal casting mold which is capable of rapid demolding and prevents sticking of a mold, characterized by, include: The support frame includes a top plate (1a) and a base (1b), with a plurality of guide rods (2) vertically arranged between the top plate (1a) and the base (1b), and a telescopic mechanism (3) provided at the bottom end of the top plate (1a). The bracket (4) is fixedly installed in the middle of the upper surface of the base (1b); The lower mold base (5) is fixedly installed on the top of the bracket (4). A forming groove (6) is provided inside the lower mold base (5). Several countersunk holes (7) are provided through the bottom of the lower mold base (5). A sealing plug (8) is provided inside the countersunk holes (7). The upper mold base (9) is slidably mounted on the guide rod (2) and located above the lower mold base (5). The bottom surface of the upper mold base (9) is provided with a stamping block (10). The side of the bottom surface of the upper mold base (9) is also provided with several insert rods (11). The bottom end of the several insert rods (11) is provided with a mounting plate (12). The upper surface of the mounting plate (12) is provided with a push rod (13) corresponding to the countersunk hole (7). The push rod (13) slides in the countersunk hole (7). The inner wall of the forming groove (6) and the surface of the stamping block (10) are provided with an anti-stick coating.

2. The mold of claim 1, wherein: The lower mold base (5) has a through hole (15) on the side corresponding to the insert rod (11), and the insert rod (11) slides in the through hole (15).

3. The mold of claim 1, wherein: The top rod (13) has several sealing rings (16) on its side wall, and the outer side of the sealing rings (16) is in close contact with the side wall of the countersunk hole (7).

4. The mold of claim 3, wherein: The inner wall of the top of the countersunk hole (7) is provided with a ventilation hole (17), and several ventilation holes (17) are connected to the air inlet pipe (18), which is connected to the booster pump (19).

5. The mold of claim 1, wherein: A sealing gasket (20) is provided on the contact surface between the sealing plug (8) and the countersunk hole (7).

6. The mold of claim 5, wherein: The lower mold base (5) is provided with a plurality of mounting cavities (21) connected to the through hole (15) along the extension direction of the through hole (15). The mounting cavity (21) is rotatably provided with a swing arm (22). One end of the swing arm (22) points to the through hole (15), and the bottom of the other end of the swing arm (22) is provided with a hammer (23). A protrusion (24) is provided in the mounting cavity (21) below the hammer (23). A toothed plate (25) is provided on the side of the insertion rod (11) facing the mounting cavity (21). The toothed plate (25) is engaged with the swing arm (22).

7. The mold of claim 6, wherein: A spring (26) is provided between the upper part of the inward-facing end of the swing arm (22) and the inner top wall of the mounting cavity (21).

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