Sand core forming device for casting piston shell

Abstract

The utility model relates to the technical field of sand core forming, in particular to a sand core forming device for casting a piston shell, which comprises a base, the top end of the base is fixedly connected with a fixed die, the upper end of the fixed die is provided with a movable die, one end of the base is fixedly connected with a first hydraulic rod, and the output end of the first hydraulic rod is fixedly connected with the movable die. An inner cavity of the fixed mold is movably sleeved with a mold core, a plurality of first connecting blocks are fixedly connected to the outer side of the mold core, a plurality of first connecting grooves are formed in the top end of the fixed mold, the first connecting blocks are slidably connected into the first connecting grooves, one sides of the first connecting grooves are fixedly connected with first elastic pieces, and one ends of the first elastic pieces are attached to the first connecting blocks. Compared with the prior art, the mold core can be replaced according to needs, can adapt to various sand core models, is better in practicability and easy and convenient to operate, and can be effectively fixed.

Description

Technical Field

[0001] This utility model relates to the field of sand core forming technology, and in particular to a sand core forming device for piston housing casting. Background Technology

[0002] Core sand is classified into clay core sand, water glass core sand, oil core sand, resin core sand, etc., according to the different binders used. Simple cores can generally be made of clay core sand; while complex cores with fine and thin cross sections, requiring high dry strength and good collapsibility, use vegetable oil core sand, resin core sand or resin core sand.

[0003] In the prior art, Chinese Patent No. CN217018505U discloses a casting sand core forming device for casting molds. The device moves the threaded rod, the moving plate, and the locking rod by sliding two sliding rods and a moving plate, so that the locking rod and the locking groove can be quickly separated and overlapped. This allows the device to fix mold bodies of different sizes and improves its practicality. However, in actual application, there are still problems such as cumbersome steps, complex structure, and difficulty in use when changing different molds. Therefore, we disclose a sand core forming device for piston housing casting. Utility Model Content

[0004] In view of this, the purpose of this utility model is to propose a sand core forming device for piston housing casting, so as to solve the problem of cumbersome steps when changing different molds.

[0005] To achieve the above objectives, this utility model provides a sand core forming device for piston housing casting, comprising a base, a fixed mold fixedly connected to the top of the base, a movable mold placed on the upper end of the fixed mold, a first hydraulic rod fixedly connected to one end of the base, the output end of the first hydraulic rod fixedly connected to the movable mold, a mold core movably sleeved in the inner cavity of the fixed mold, a plurality of first connecting blocks fixedly connected to the outer side of the mold core, a plurality of first connecting grooves opened at the top of the fixed mold, the first connecting blocks slidably connected in the first connecting grooves, a first spring sheet fixedly connected to one side of the first connecting groove, and one end of the first spring sheet abutting against the first connecting block.

[0006] Preferably, the first connecting block is an L-shaped block, the first connecting groove includes a rectangular groove and an L-shaped groove, the first connecting block is adapted to the L-shaped groove of the first connecting groove, the rectangular groove and the L-shaped groove of the first connecting groove are connected, and the first spring piece is fixedly connected to one end of the rectangular groove of the first connecting groove.

[0007] Preferably, the first connecting groove and the first connecting block are both arc-shaped, the mold core and the fixed mold are both cylindrical, the center of the arc of the first connecting groove and the first connecting block is the same point as the center of the mold core, and a first placement groove is provided at the bottom of the first connecting groove, which is located at the lower end of the first spring piece.

[0008] Preferably, a first telescopic rod is fixedly connected to the middle of the base, a second telescopic rod is movably sleeved on the middle of the first telescopic rod, a plurality of second hydraulic rods are fixedly connected to the top of the second telescopic rod, and the output end of the second hydraulic rod passes through the fixed mold to the mold core.

[0009] Preferably, a push plate is movably sleeved at the bottom end of the inner cavity of the mold core, and a plurality of second connecting grooves are provided at the lower end of the push plate. A second spring is fixedly connected to one end of the second connecting groove. The second hydraulic rod is movably engaged with the second connecting groove. One end of the second connecting groove is in contact with the second hydraulic rod. The output end of the second hydraulic rod is L-shaped.

[0010] Preferably, the push plate is an annular plate, the second connecting groove and the second hydraulic rod are both arc-shaped, the center of the second connecting groove and the second hydraulic rod are the same point as the center of the push plate, and a second placement groove is provided at the top of the second connecting groove, which is located at the top of the second spring piece.

[0011] Preferably, the lower end of the second telescopic rod has several holes, one end of the first telescopic rod is fixedly connected to two springs, one end of each spring is fixedly connected to a connecting plate, both ends of the connecting plate are fixedly connected to a fixing rod, the fixing rod passes through the holes of the first telescopic rod and the second telescopic rod and is sleeved, and the spring is movably sleeved with the fixing rod.

[0012] The beneficial effects of this utility model are as follows: the mold core can be replaced as needed, and it can be adapted to a variety of different sand core models, making it more practical. The user can rotate the mold core to drive the first connecting block to engage with the first connecting groove, so that the first spring can restrict the position of the first connecting block, thereby restricting the position of the mold core and preventing the mold core from moving up and down. The operation is simple and convenient, and the mold core can be effectively fixed, so that the mold core remains fixed during the sand core molding operation, ensuring the normal use of the mold core, and making the mold core easy to replace and use.

[0013] The second hydraulic rod can push the molding sand core out of the mold core cavity, making it easier to remove the sand core. The push plate can be engaged with the second connecting groove, so that the positions of the second hydraulic rod and the push plate are relatively fixed. This allows the second hydraulic rod to drive the push plate to move, which in turn pushes the sand core to move. This avoids the situation where the contact area between the second hydraulic rod and the sand core is too small and the sand core thickness is insufficient, which could cause damage to the sand core. Attached Figure Description

[0014] To more clearly illustrate the technical solutions in this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only for this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0015] Figure 1 This is a schematic diagram of an embodiment of the present utility model;

[0016] Figure 2 This is a partially cutaway three-dimensional structural diagram of the first telescopic rod of this utility model;

[0017] Figure 3 This utility model Figure 2 A magnified three-dimensional structural diagram at point A;

[0018] Figure 4 This is a partially cutaway three-dimensional structural diagram of the push plate of this utility model.

[0019] The diagram is marked as follows:

[0020] 1. Base; 2. Fixed mold; 3. Moving mold; 4. First hydraulic rod; 5. Mold core; 6. First connecting groove; 7. First spring; 8. First connecting block; 9. First telescopic rod; 10. Second telescopic rod; 11. Second hydraulic rod; 12. Push plate; 13. Second connecting groove; 14. Second spring; 15. Fixing rod; 16. Connecting plate; 17. Spring. Detailed Implementation

[0021] To make the objectives, technical solutions, and advantages of this utility model clearer, the present utility model will be further described in detail below with reference to specific embodiments.

[0022] It should be noted that, unless otherwise defined, the technical or scientific terms used in this utility model should have the ordinary meaning understood by one of ordinary skill in the art to which this utility model pertains. The terms "first," "second," and similar terms used in this utility model do not indicate any order, quantity, or importance, but are merely used to distinguish different components. Terms such as "comprising" or "including" mean that the element or object preceding the word encompasses the elements or objects listed following the word and their equivalents, without excluding other elements or objects. Terms such as "connected" or "linked" are not limited to physical or mechanical connections, but can include electrical connections, whether direct or indirect. Terms such as "upper," "lower," "left," and "right" are used only to indicate relative positional relationships; when the absolute position of the described object changes, the relative positional relationship may also change accordingly.

[0023] like Figures 1-4As shown, a sand core forming device for piston housing casting includes a base 1, a fixed mold 2 fixedly connected to the top of the base 1, a movable mold 3 placed on the upper end of the fixed mold 2, a first hydraulic rod 4 fixedly connected to one end of the base 1, the output end of the first hydraulic rod 4 fixedly connected to the movable mold 3, a mold core 5 movably sleeved in the inner cavity of the fixed mold 2, a plurality of first connecting blocks 8 fixedly connected to the outer side of the mold core 5, a plurality of first connecting grooves 6 opened at the top of the fixed mold 2, the first connecting blocks 8 slidably connected in the first connecting grooves 6, a first spring piece 7 fixedly connected to one side of the first connecting groove 6, one end of the first spring piece 7 abutting against the first connecting block 8, the first connecting block 8 being an L-shaped block, and the first connecting groove 6 including a rectangular groove and an L-shaped groove. 8 is adapted to the L-shaped groove of the first connecting groove 6. The rectangular groove and the L-shaped groove of the first connecting groove 6 are connected. The first spring piece 7 is fixedly connected to one end of the rectangular groove of the first connecting groove 6. The first connecting groove 6 and the first connecting block 8 are both arc-shaped. The mold core 5 and the fixed mold 2 are both cylindrical. The center of the arc of the first connecting groove 6 and the first connecting block 8 is the same point as the center of the mold core 5. The bottom end of the first connecting groove 6 is provided with a first placement groove. The first placement groove is located at the lower end of the first spring piece 7. In use, the fixed mold 2 is fixedly connected to the top end of the base 1, so that the base 1 fixes the position of the fixed mold 2. The moving mold 3 is placed on the upper end of the fixed mold 2. The first hydraulic rod 4 is fixedly connected to one end of the base 1. The output end of the first hydraulic rod 4 is connected to the moving mold 3. The fixed connection allows the base 1 to fix the position of the first hydraulic rod 4, enabling the first hydraulic rod 4 to drive the moving mold 3 to move up and down, causing the moving mold 3 and the fixed mold 2 to fit together, thus forming the sand core and facilitating its removal. A mold core 5 is movably fitted into the inner cavity of the fixed mold 2. Several first connecting blocks 8 are fixedly connected to the outer side of the mold core 5. Several first connecting grooves 6 are opened at the top of the fixed mold 2. The first connecting blocks 8 are slidably connected within the first connecting grooves 6. A first spring piece 7 is fixedly connected to one side of the first connecting groove 6, with one end of the first spring piece 7 fitting against the first connecting block 8. This allows the mold core 5 to be replaced as needed, adapting to various sand core models, improving practicality. The user can rotate the mold core 5 to drive the first connecting blocks 8. The engagement of block 8 with the first connecting groove 6 allows the first spring piece 7 to restrict the position of the first connecting block 8, thereby restricting the position of the mold core 5. This prevents the mold core 5 from moving up and down, effectively fixing it in place. This ensures the mold core 5 remains fixed during sand core molding operations, guaranteeing its normal use and facilitating easy replacement. The first connecting block 8 is L-shaped, and the first connecting groove 6 includes a rectangular groove and an L-shaped groove. The first connecting block 8 is compatible with the L-shaped groove of the first connecting groove 6, and the rectangular and L-shaped grooves of the first connecting groove 6 are connected. The first spring piece 7 is fixedly connected to one end of the rectangular groove of the first connecting groove 6. A first placement groove is provided at the bottom of the first connecting groove 6, located below the first spring piece 7.The mold core 5 allows the first connecting block 8 to vertically enter the inner cavity of the first connecting groove 6, pressing the first spring piece 7. The first spring piece 7 is then pressed into the first placement groove. Afterwards, the mold core 5 drives the first connecting block 8 to move to the desired position within the inner cavity of the first connecting groove 6. At this point, the first connecting block 8 stops pressing the first spring piece 7, allowing the first spring piece 7 to return to its original position and adhere to the first connecting block 8, restricting the position of the first connecting block 8 after rotation. This prevents the first connecting block 8 from moving vertically after rotation, thus restricting the movement of the mold core 5 and ensuring its normal use. Since both the first connecting groove 6 and the first connecting block 8 are arc-shaped, and both the mold core 5 and the fixed mold 2 are cylindrical, with the center of the arc of the first connecting groove 6 and the first connecting block 8 converging with the center of the mold core 5, the mold core 5 can drive the first connecting block 8 to rotate within the inner cavity of the fixed mold 2, thereby facilitating the disassembly of the mold core 5 and the fixed mold 2.

[0024] As a preferred embodiment of this example, Figure 2 and Figure 4As shown, a first telescopic rod 9 is fixedly connected to the middle of the base 1. A second telescopic rod 10 is movably sleeved on the middle of the first telescopic rod 9. Several second hydraulic rods 11 are fixedly connected to the top of the second telescopic rod 10. The output end of the second hydraulic rod 11 passes through the fixed mold 2 into the mold core 5. A push plate 12 is movably sleeved on the bottom of the inner cavity of the mold core 5. Several second connecting grooves 13 are opened at the lower end of the push plate 12. A second spring piece 14 is fixedly connected to one end of the second connecting groove 13. The second hydraulic rod 11 is movably engaged with the second connecting groove 13. One end of the second connecting groove 13 is in contact with the second hydraulic rod 11. The output end of the second hydraulic rod 11 is L-shaped. The push plate 12 is an annular plate. The second connecting groove 13 and the second hydraulic rod 11 are both arc-shaped. The center of rod 11 and push plate 12 are the same point. The top of the second connecting groove 13 is provided with a second placement groove, which is located at the top of the second spring 14. The lower end of the second telescopic rod 10 is provided with several holes. One end of the first telescopic rod 9 is fixedly connected to two springs 17. One end of the springs 17 is fixedly connected to a connecting plate 16. Both ends of the connecting plate 16 are fixedly connected to fixing rods 15. The fixing rods 15 pass through the holes of the first telescopic rod 9 and the second telescopic rod 10 and are sleeved. The springs 17 are movably sleeved with the fixing rods 15. The first telescopic rod 9 is fixedly connected to the middle of the base 1. The second telescopic rod 10 is movably sleeved in the middle of the first telescopic rod 9. The top of the second telescopic rod 10 is fixedly connected to several second hydraulic rods 11. The output end of the second hydraulic rod 11 passes through... The mold 2 is positioned inside the mold core 5, fixing the position of the first telescopic rod 9 on the base 1. The first telescopic rod 9, through the second telescopic rod 10, restricts the position of the second hydraulic rod 11, allowing the second hydraulic rod 11 to push the molding sand core inside the mold core 5 out of the mold core 5 for easy removal. A push plate 12 is movably sleeved at the bottom of the mold core 5. The lower end of the push plate 12 has several second connecting grooves 13. One end of each second connecting groove 13 is fixedly connected to a second spring piece 14. The second hydraulic rod 11 is movably engaged with the second connecting groove 13, with one end of the second connecting groove 13 fitting against the second hydraulic rod 11. The output end of the second hydraulic rod 11 is L-shaped, allowing the push plate 12 and the second connecting groove 13 to engage, thus enabling the second hydraulic rod 11 and the push plate 12 to engage. The position of plate 12 is relatively fixed, allowing the second hydraulic rod 11 to drive the push plate 12 to move. This allows the push plate 12 to push the sand core, preventing damage to the sand core due to insufficient contact area and sand core thickness when the second hydraulic rod 11 directly pushes it. Since the push plate 12 is an annular plate, and both the second connecting groove 13 and the second hydraulic rod 11 are arc-shaped, with their centers at the same point as the push plate 12, the top of the second connecting groove 13 has a second placement groove located at the top of the second spring piece 14. This allows the second hydraulic rod 11 to engage with the second connecting groove 13 after the push plate 12 is rotated, thus restricting the position of the second hydraulic rod 11.The second hydraulic rod 11 and the push plate 12 are relatively fixed, allowing the second hydraulic rod 11 to drive the push plate 12 to move vertically and push the molding sand core. Several holes are provided at the lower end of the second telescopic rod 10. Two springs 17 are fixedly connected to one end of the first telescopic rod 9, and a connecting plate 16 is fixedly connected to one end of each spring 17. Fixed rods 15 are fixedly connected to both ends of the connecting plate 16. The fixed rods 15 pass through the holes of the first telescopic rod 9 and the second telescopic rod 10, and the springs 17 are movably connected to the fixed rods 15, allowing the second telescopic rod 10 to enter the inner cavity of the first telescopic rod 9. The vertical movement adjusts the position of the top end of the output end of the second hydraulic cylinder 11 to accommodate different mold cores 5. When the output end of the second hydraulic cylinder 11 extends to a fixed length but cannot fully eject the sand core, the top end of the second hydraulic cylinder 11 can be adjusted. This allows the second hydraulic cylinder 11 to accommodate sand cores of various thicknesses, improving the device's practicality. The spring 17 restricts the position of the fixed rod 15, which in turn restricts the relative position of the first telescopic rod 9 and the second telescopic rod 10, thus fixing the position of the second telescopic rod 10 after movement and ensuring the normal operation of the device.

[0025] Those skilled in the art should understand that the discussion of any of the above embodiments is merely exemplary and is not intended to imply that the scope of the present invention (including the claims) is limited to these examples; within the framework of the present invention, the technical features of the above embodiments or different embodiments can also be combined, the steps can be implemented in any order, and there are many other variations of the different aspects of the present invention as described above, which are not provided in the details for the sake of brevity.

[0026] This utility model is intended to cover all such substitutions, modifications, and variations that fall within the broad scope of the appended claims. Therefore, any omissions, modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this utility model should be included within the protection scope of this utility model.

Claims

1. A sand core forming device for piston housing casting, comprising a base (1), characterized in that, A fixed mold (2) is fixedly connected to the top of the base (1). A movable mold (3) is placed on the upper end of the fixed mold (2). A first hydraulic rod (4) is fixedly connected to one end of the base (1). The output end of the first hydraulic rod (4) is fixedly connected to the movable mold (3). A mold core (5) is movably sleeved in the inner cavity of the fixed mold (2). Several first connecting blocks (8) are fixedly connected to the outer side of the mold core (5). Several first connecting grooves (6) are opened at the top of the fixed mold (2). The first connecting blocks (8) are slidably connected in the first connecting grooves (6). A first spring piece (7) is fixedly connected to one side of the first connecting groove (6). One end of the first spring piece (7) is in contact with the first connecting block (8).

2. The sand core forming apparatus for piston housing casting according to claim 1, wherein The first connecting block (8) is an L-shaped block, the first connecting groove (6) includes a rectangular groove and an L-shaped groove, the first connecting block (8) is adapted to the L-shaped groove of the first connecting groove (6), the rectangular groove and the L-shaped groove of the first connecting groove (6) are connected, and the first spring piece (7) is fixedly connected to one end of the rectangular groove of the first connecting groove (6).

3. The sand core forming apparatus for piston housing casting according to claim 1, wherein The first connecting groove (6) and the first connecting block (8) are both arc-shaped, the mold core (5) and the fixed mold (2) are both cylindrical, the center of the arc of the first connecting groove (6) and the first connecting block (8) is the same point as the center of the mold core (5), the bottom end of the first connecting groove (6) is provided with a first placement groove, and the first placement groove is located at the lower end of the first spring piece (7).

4. The sand core forming apparatus for piston housing casting according to claim 1, wherein A first telescopic rod (9) is fixedly connected to the middle of the base (1), and a second telescopic rod (10) is movably sleeved on the middle of the first telescopic rod (9). A plurality of second hydraulic rods (11) are fixedly connected to the top of the second telescopic rod (10), and the output end of the second hydraulic rod (11) passes through the fixed mold (2) and into the mold core (5).

5. The sand core forming apparatus for piston housing casting according to claim 4, wherein A push plate (12) is movably sleeved at the bottom of the inner cavity of the mold core (5). The lower end of the push plate (12) is provided with several second connecting grooves (13). A second spring piece (14) is fixedly connected to one end of the second connecting groove (13). The second hydraulic rod (11) is movably engaged with the second connecting groove (13). One end of the second connecting groove (13) is in contact with the second hydraulic rod (11). The output end of the second hydraulic rod (11) is L-shaped.

6. The sand core forming apparatus for piston housing casting according to claim 5, wherein The push plate (12) is an annular plate. The second connecting groove (13) and the second hydraulic rod (11) are both arc-shaped. The center of the second connecting groove (13) and the second hydraulic rod (11) is the same point as the center of the push plate (12). A second placement groove is provided at the top of the second connecting groove (13). The second placement groove is located at the top of the second spring piece (14).

7. The sand core forming apparatus for piston housing casting according to claim 4, wherein The lower end of the second telescopic rod (10) has several holes. One end of the first telescopic rod (9) is fixedly connected to two springs (17). One end of the spring (17) is fixedly connected to a connecting plate (16). Both ends of the connecting plate (16) are fixedly connected to a fixing rod (15). The fixing rod (15) passes through the holes of the first telescopic rod (9) and the second telescopic rod (10) and is sleeved. The spring (17) is movably sleeved with the fixing rod (15).

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