Sand box for lost foam casting processing

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By using the design of hinged side wall panels and locking pins in the disappearing mold casting sand box, the problem of difficulty in removing the sand box is solved, convenient disassembly and efficient sand filling are achieved, and the adaptability and quality of the casting process are improved.

CN222344144UActive Publication Date: 2025-01-14ZHENGZHOU CHANGDA AUTOMOTIVE PARTS CO LTD

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Patent Information

Application Number: CN202420849807.1
Authority / Receiving Office: CN · China
Patent Type: Utility models(China)
Current Assignee / Owner
Filing Date: 2024-04-23
Publication Date: 2025-01-14
Estimated Expiration: 2034-04-23

AI Technical Summary

Technical Problem

During the disappearing mold casting process, existing sand boxes are more difficult to dismantle, affecting the casting quality and efficiency.

Method used

A sand box structure including a rectangular frame-shaped fixing frame, hinged side wall panel, fixed U-slot, right-angle plug plate and locking pin is designed. Through the design of movable side wall panel and hinged connecting column, it facilitates the removal of sand box and molding of sandbox. The filling reduces the possibility of squeeze and leakage.

Benefits of technology

It realizes convenient disassembly of sand boxes, reduces the difficulty of mold release, and improves the adaptability and smoothness in a sandy environment, ensuring the continuity and quality of the casting process.

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Abstract

The utility model relates to the technical field of casting sand boxes, in particular to an evanescent mode casting processing sand box which comprises a fixing frame, side wall plates are hinged to the upper ends of the side walls of the fixing frame, fixing U-shaped grooves are fixedly formed in the upper ends of the side wall plates, locking holes are formed in the side walls of the two ends of each fixing U-shaped groove, and the evanescent mode casting processing sand box further comprises right-angle plug plates. The adjacent U-shaped fixing grooves are connected through right-angle plug plates, locking pins are installed in the right-angle plug plates in a sliding mode, locking pins are installed at the positions, corresponding to the locking holes, of the right-angle plug plates, and the two sides of the side wall plates and the two ends of the U-shaped fixing grooves are all arranged to be inclined faces. By arranging the movable side wall plates, the side wall plates are rotated towards the outer side, so that the side wall plates leave the molding sand position, and demolding of the evanescent mode after casting is completed is facilitated.

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Description

Technical Field

[0001] The present application relates to the technical field of casting sand boxes, and in particular to a sand box for lost foam casting. Background Art

[0002] Lost foam casting is a new casting method in which paraffin or foam models with similar size and shape to the casting are bonded together into a model, coated with refractory coating and dried, buried in dry quartz sand for vibration molding, and poured under negative pressure to vaporize the model, so that liquid metal occupies the position of the model and forms a casting after solidification and cooling.

[0003] In the process of lost foam casting, in order to ensure the quality of casting, continuous vibration and negative pressure pouring are required. In this process, the originally tightly squeezed molding sand becomes more compact, making it more difficult to remove the sand box. Summary of the invention

[0004] In view of the shortcomings of the prior art, the purpose of the present application is to provide a sand box for lost foam casting that is easy to disassemble.

[0005] The above application objectives of this application are achieved through the following technical solutions:

[0006] A sand box for lost foam casting, comprising:

[0007] A fixing frame, wherein the fixing frame is in the shape of a rectangular frame;

[0008] Side wall panels, a plurality of the side wall panels are respectively hinged to the upper ends of the side walls of the fixing frame;

[0009] A fixed U-groove, the upper ends of the side wall plates are fixedly mounted with the fixed U-groove, and the side walls at both ends of the fixed U-groove are provided with locking holes;

[0010] A right-angle plug plate, when the side wall plates are rotated to be perpendicular to the end surface of the fixing frame, the right-angle plug plate can be detachably installed in two adjacent fixed U grooves;

[0011] A locking pin, which is slidably mounted in the right-angle plug plate, and the right-angle plug plate is provided with the locking pin at positions corresponding to the locking holes;

[0012] Wherein, both sides of the side wall plate and both ends of the fixed U groove are arranged as inclined surfaces, and when the side wall plates are rotated to be perpendicular to the end surface of the fixing frame, the adjacent inclined surfaces are fitted together.

[0013] Optionally, the lower side of the side wall plate is set as a semicircular end, and at least two installation grooves are provided on the lower side of the side wall plate. A connecting plate with a semicircular end is fixedly installed on the upper end of the fixing frame, and the connecting plate is installed in the installation groove. The side wall plate and the connecting plate are rotatably connected by the same connecting column passing through the semicircular ends.

[0014] Optionally, a triangular baffle is fixedly connected to the inner side of the upper end of the fixing frame, the inclined surface of the triangular baffle facing the semicircular end of the side wall plate is an arc that fits the semicircular end, and the mounting groove is fixedly connected to the triangular baffle that fits the semicircular end of the connecting plate.

[0015] Optionally, a pin-loading hole with a single-side opening is provided on the fixed U-groove, and a sliding groove is provided on the upper end of the right-angle plug plate. The locking pin can be slidably installed in the pin-loading hole, and a pull rod is installed on the side of the locking pin. The pull rod is installed in the sliding groove, and the length of the sliding groove is less than the distance from the pull rod to the end of the locking pin away from the locking hole.

[0016] Optionally, a locking spring is installed on the inner side of one end of the pin mounting hole close to the locking hole, and one end of the locking spring is fixedly connected to the locking pin.

[0017] Optionally, one end of the pin mounting hole close to the locking hole is threadedly connected to a closed ring.

[0018] Optionally, when the locking pin is inserted into the locking hole, there is a certain distance between the bottom surface of the right-angle plug plate and the bottom of the fixed U-groove.

[0019] Optionally, the fixed U-groove, right-angle plug plate and locking pin are also provided in the middle of the side wall plate.

[0020] In summary, the present application includes at least one of the following beneficial technical effects:

[0021] By setting a movable side wall plate, the side wall plate can be rotated outward to make it leave the molding sand position, and the sand box can be removed, which reduces the difficulty of demoulding and facilitates the demoulding of the lost foam after casting.

[0022] When the sand box is used, it needs to be filled with molding sand, and a hinged structure with two semicircular ends through which a connecting column passes is provided. The structure is simple, and there is no plane between the side wall plate and the fixing frame that gradually fits in the hinged position during the rotation process, which reduces the possibility of squeezing the molding sand, thereby increasing the adaptability of the connection structure to a sandy soil environment;

[0023] The length of the sliding groove is set to be smaller than the distance from the pull rod to the end of the locking pin away from the locking hole, that is, when the locking pin completely slides to the locked state, the locking pin is in a closed state to the sliding groove, reducing the possibility of molding sand entering the pin hole and improving the smoothness of the locking pin structure in sandy soil environment. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 It is a schematic diagram of the overall structure of an embodiment of the present application;

[0025] Figure 2is a schematic structural diagram of a locking pin portion of an embodiment of the present application;

[0026] Figure 3 It is a schematic structural diagram of the installation slot portion of an embodiment of the present application.

[0027] Reference numerals: 1, fixing frame; 11, triangular baffle;

[0028] 2. Side wall plate; 21. Mounting groove; 22. Connecting plate; 23. Connecting column;

[0029] 3. Fixed U groove; 31. Locking hole;

[0030] 4. Right angle plug plate;

[0031] 5. Locking pin; 51. Pin hole; 511. Sliding groove; 52. Pull rod; 53. Locking spring; 54. Closing ring. DETAILED DESCRIPTION

[0032] The present application is further described in detail below in conjunction with the accompanying drawings.

[0033] See also Figure 1 and Figure 2 , is a sand box for lost foam casting disclosed in an embodiment of the present application, including a fixed frame 1, the fixed frame 1 is in the shape of a rectangular frame, the upper ends of the side walls of the fixed frame 1 are hinged with side wall plates 2, the upper ends of the side wall plates 2 are fixedly installed with fixed U-grooves 3, and the side walls at both ends of the fixed U-grooves 3 are provided with locking holes 31, and also include right-angle plug plates 4, when the side wall plates 2 are rotated to be perpendicular to the end faces of the fixed frame 1, adjacent fixed U-grooves 3 are connected by right-angle plug plates 4, the right-angle plug plates 4 are placed in the fixed U-grooves 3, and locking pins 5 are slidably installed in the right-angle plug plates 4, and locking pins 5 are installed at the positions of the right-angle plug plates 4 corresponding to the locking holes 31, wherein the two sides of the side wall plates 2 and the two ends of the fixed U-grooves 3 are arranged as inclined surfaces, and when the side wall plates 2 are rotated to be perpendicular to the end faces of the fixed frame 1, the adjacent inclined surfaces are fitted together.

[0034] Specifically, the hinged side wall panels 2 form a sand box, and the U-grooves 3 and the right-angle plug plates 4 are fixed to form a connecting piece for connecting the movable side wall panels 2.

[0035] In this way, by providing the movable side wall plate 2, the side wall plate 2 is rotated outward to make it leave the molding sand position, and the sand box can be removed, which reduces the difficulty of demoulding and facilitates the demoulding of the lost foam after casting.

[0036] In some feasible embodiments, the fixing frame 1 is in the shape of a rectangular frame, the side wall plate 2 is a rectangular plate, the fixed U-groove 3 is a rectangular bar with a rectangular groove at the upper end, the right-angle plug plate 4 is a right-angle block formed by splicing two rectangular plates, and the locking pin 5 is a plug. When the right-angle plug plate 4 is placed in the fixed U-groove 3, the locking pin 5 is inserted into the locking hole 31 to fix the position of the right-angle plug plate 4. Both sides of the side wall plate 2 and both ends of the fixed U-groove 3 are set as inclined surfaces, so that the adjacent side wall plates 2 and the fixed U-groove 3 can fit together after closing, thereby reducing the possibility of leakage during subsequent filling of molding sand.

[0037] As a specific implementation of a sand box for lost foam casting provided in the application, please refer to Figure 1 and Figure 3 The lower side of the side wall plate 2 is set as a semicircular end, and at least two installation grooves 21 are provided on the lower side of the side wall plate 2. A connecting plate 22 with a semicircular end is fixedly installed on the upper end of the fixing frame 1. The connecting plate 22 is installed in the installation groove 21. The semicircular ends of the side wall plate 2 and the connecting plate 22 are rotatably connected with the same connecting column 23.

[0038] On the whole, the sand box needs to be filled with molding sand when it is used, and a hinged structure with two semicircular ends penetrated by a connecting column 23 is provided. The structure is simple, and there is no plane between the side wall plate 2 and the fixed frame 1 that gradually fits close to each other during the rotation process at the hinged position, which reduces the possibility of squeezing the molding sand, thereby increasing the adaptability of the connection structure to a sandy environment.

[0039] Furthermore, a triangular baffle 11 is fixedly connected to the inner side of the upper end of the fixing frame 1, and the inclined surface of the triangular baffle 11 facing the semicircular end of the side wall plate 2 is an arc shape that fits the semicircular end. The mounting groove 21 is also fixedly connected to the triangular baffle 11 that fits the semicircular end of the connecting plate 22.

[0040] It should be understood that by providing the triangular baffle 11, the inner molding sand is blocked, reducing the possibility of the molding sand being brought into the hinged structure during the rotation process, further reducing the possibility of squeezing the molding sand, and thereby increasing the adaptability of the connection structure to a sandy environment.

[0041] As another specific embodiment of a sand box for lost foam casting provided by the application, please refer to Figure 1 and Figure 2 A pin hole 51 with a single-side opening is provided on the fixed U-groove 3, and a sliding groove 511 is provided at the upper end of the right-angle plug plate 4. The locking pin 5 can be slidably installed in the pin hole 51, and a pull rod 52 is installed on the side of the locking pin 5. The pull rod 52 is installed in the sliding groove 511, and the length of the sliding groove 511 is less than the distance from the pull rod 52 to the end of the locking pin 5 away from the locking hole 31.

[0042] In combination with specific usage scenarios, the length of the sliding groove 511 is set to be smaller than the distance from the pull rod 52 to the end of the locking pin 5 away from the locking hole 31. That is, when the locking pin 5 completely slides to the locked state, the locking pin 5 is in a closed state with respect to the sliding groove 511, thereby reducing the possibility of molding sand entering the pin hole 51 and improving the smoothness of the use of the locking pin 5 structure in a sandy environment.

[0043] In some feasible embodiments, a threaded hole is opened on the side of the locking pin 5 , and the pull rod 52 is threadedly connected to the locking pin 5 .

[0044] Furthermore, a locking spring 53 is installed on the inner side of one end of the pin mounting hole 51 close to the locking hole 31 , and one end of the locking spring 53 is fixedly connected to the locking pin 5 .

[0045] It should be understood that by providing the locking spring 53 , the locking pin 5 can always be kept in a locked state, thereby reducing the possibility of the right-angle plug plate 4 falling off.

[0046] Furthermore, one end of the pin-mounting hole 51 close to the locking hole 31 is threadedly connected to a closed ring 54 .

[0047] It should be understood that by providing the closed ring 54, the installation position of the locking spring 53 is closed, reducing the possibility of molding sand entering the working position of the locking spring 53, and improving the smoothness of the use of the locking spring 53 structure in a sandy soil environment.

[0048] In some feasible embodiments, the pin-loading hole 51 is a stepped hole, the diameter of which decreases successively from the end close to the locking hole 31, and they are respectively the mounting holes for the closed ring 54 and the locking spring 53, and the mounting hole for the locking pin 5. The rear end face of the closed ring 54 after installation is flush with the end face of the pin-loading hole 51, reducing the impact on the installation of the right-angle plug plate 4. One end of the locking pin 5 is against the stepped position of the stepped hole, and the other end is fixedly connected to the locking pin 5.

[0049] As a specific implementation of a sand box for lost foam casting provided in the application, when the locking pin 5 is inserted into the locking hole 31, the bottom surface of the right-angle plug plate 4 and the bottom of the fixed U-groove 3 have a certain distance.

[0050] It should be understood that by setting a certain distance between the bottom surface of the right-angle plug plate 4 and the bottom of the fixed U-groove 3, the possibility of residual molding sand in the fixed U-groove 3 supporting the right-angle plug plate 4 and preventing the locking pin 5 from entering the locking hole 31 is reduced, thereby facilitating the installation of the right-angle plug plate 4.

[0051] As a specific implementation of a sand box for lost foam casting provided in the application, a fixed U-groove 3, a right-angle plug plate 4 and a locking pin 5 are also provided in the middle of the side wall plate 2.

[0052] It should be understood that the molding sand needs to be compacted under a relatively high pressure after filling, and the connection strength is increased by providing multiple sets of fixed U-grooves 3, right-angle plug plates 4 and locking pins 5.

[0053] The embodiments of this specific implementation method are all preferred embodiments of the present application, and are not intended to limit the protection scope of the present application. Therefore, all equivalent changes made based on the structure, shape, and principle of the present application should be included in the protection scope of the present application.

Claims

1. A sand box for lost foam casting, characterized in that: include: A fixing frame (1), the fixing frame (1) being in the shape of a rectangular frame; Side wall plates (2), a plurality of the side wall plates (2) being respectively hinged to the upper ends of the side walls of the fixing frame (1); A fixed U groove (3), the upper end of each of the side wall plates (2) being fixedly mounted with the fixed U groove (3), and locking holes (31) being provided on the side walls at both ends of the fixed U groove (3); A right-angle plug plate (4), when the side wall plates (2) are rotated to be perpendicular to the end surface of the fixing frame (1), the right-angle plug plate (4) can be detachably installed in two adjacent fixing U grooves (3); A locking pin (5), the locking pin (5) being slidably mounted in the right-angle plug plate (4), and the locking pin (5) being mounted at positions of the right-angle plug plate (4) corresponding to the locking holes (31); Wherein, both sides of the side wall plate (2) and both ends of the fixed U groove (3) are arranged as inclined surfaces, and when the side wall plates (2) are rotated to be perpendicular to the end surface of the fixing frame (1), the adjacent inclined surfaces are fitted together.

2. The lost foam casting sand box according to claim 1, characterized in that: The lower side of the side wall plate (2) is arranged as a semicircular end, and at least two mounting grooves (21) are provided on the lower side of the side wall plate (2). A connecting plate (22) having a semicircular upper end is fixedly mounted on the upper end of the fixing frame (1), and the connecting plate (22) is mounted in the mounting groove (21). The semicircular ends of the side wall plate (2) and the connecting plate (22) are rotatably connected to each other via a same connecting column (23).

3. The lost foam casting sand box according to claim 2, characterized in that: A triangular baffle (11) is fixedly connected to the inner side of the upper end of the fixing frame (1); the inclined surface of the triangular baffle (11) facing the semicircular end of the side wall plate (2) is an arc shape that fits the semicircular end; and the mounting groove (21) is fixedly connected to the triangular baffle (11) that fits the semicircular end of the connecting plate (22).

4. The lost foam casting sand box according to claim 1, characterized in that: The fixed U-groove (3) is provided with a pin-loading hole (51) with a single-side opening, and the pin-loading hole (51) is provided with a sliding groove (511) at the upper end of the right-angle plug plate (4). The locking pin (5) is slidably installed in the pin-loading hole (51), and a pull rod (52) is installed on the side of the locking pin (5), and the pull rod (52) is installed in the sliding groove (511). The length of the sliding groove (511) is less than the distance from the pull rod (52) to the end of the locking pin (5) away from the locking hole (31).

5. The lost foam casting sand box according to claim 4, characterized in that: A locking spring (53) is installed on the inner side of one end of the pin mounting hole (51) close to the locking hole (31), and one end of the locking spring (53) is fixedly connected to the locking pin (5).

6. A sand box for lost foam casting according to claim 5, characterized in that: One end of the pin mounting hole (51) close to the locking hole (31) is threadedly connected to a closed ring (54).

7. The lost foam casting sand box according to claim 1, characterized in that: When the locking pin (5) is inserted into the locking hole (31), a certain distance exists between the bottom surface of the right-angle plug plate (4) and the bottom of the fixed U groove (3).

8. The lost foam casting sand box according to claim 1, characterized in that: The fixed U groove (3), the right-angle plug plate (4) and the locking pin (5) are also provided in the middle of the side wall plate (2).