Non-riser sand mold structure of volute casting

Abstract

The utility model discloses a riser-free sand mold structure of a volute casing casting, which comprises an upper sand box and a lower sand box, and is characterized in that a locking unit is arranged in the upper sand box and the lower sand box, and comprises a rotatable control piece positioned on the lower sand box and a movable locking piece positioned on the upper sand box; and when the control piece rotates towards the upper sand box, the control piece drives the locking piece to move to the upper sand box and the lower sand box to lock the upper sand box and the lower sand box. The first protruding block and the second protruding block are arranged on the upper sand box and the lower sand box, the upper sand box and the lower sand box are rapidly locked and unlocked by being matched with the locking pieces and the control pieces on the first protruding block and the second protruding block, meanwhile, the direction consistency is achieved by being matched with the locking units of different numbers or positions, and the fault tolerance of misplacement is improved under the action of the buffer springs.

Description

Technical Field

[0001] This utility model relates to the field of sand mold structure technology, and in particular to riserless sand mold structure for vortex shell castings. Background Technology

[0002] In the foundry industry, sand casting is a widely used manufacturing process, particularly suitable for producing metal parts with complex shapes. As a crucial component of mechanical equipment such as pumps and compressors, the casting quality of volute castings directly affects the performance and reliability of the final product. Traditional volute casting sand mold structures typically include an upper sand box and a lower sand box. To ensure the stability of the sand mold during pouring, a riser is usually placed on top of the sand mold to prevent shrinkage cavities or porosity defects.

[0003] Chinese patent with publication number "CN202110122320.4" discloses a method for sand casting without risers for vortex shells. It saves costs by using sand molds without risers. However, this sand box requires high sealing performance and is too cumbersome to lock frequently with screws and nuts. Utility Model Content

[0004] This invention addresses the shortcomings of existing technologies by providing a riser-free sand mold structure for vortex shell castings.

[0005] To solve the above-mentioned technical problems, the present invention provides the following technical solution: a riserless sand mold structure for vortex casting includes an upper sand box and a lower sand box, characterized in that: a locking unit is provided in the upper sand box and the lower sand box, the locking unit includes a rotatable control component located on the lower sand box and a movable locking component located on the upper sand box, when the control component rotates toward the upper sand box, the control component drives the locking component to move to lock the upper sand box and the lower sand box.

[0006] In the above scheme, preferably, a first protrusion is provided on the upper sand box and a second protrusion is provided on the lower sand box, and the first protrusion and the second protrusion are stacked when the upper sand box and the lower sand box are stacked.

[0007] In the above scheme, preferably, the second protrusion is provided with a rotating shaft, and the control component is connected to the rotating shaft through the first rod.

[0008] In the above scheme, preferably, both the first protrusion and the second protrusion are provided with grooves to match the rotation of the first rod.

[0009] In the above scheme, preferably, a buffer spring is provided on the first protrusion, and the buffer spring is used to separate the upper sand box and the lower sand box.

[0010] In the above scheme, preferably, the first protrusion is provided with a placement groove, and a buffer spring is provided in the placement groove.

[0011] In the above scheme, preferably, the upper sand box includes a first side and a second side, the lower sand box includes a third side and a fourth side, the locking units of the first side and the third side are matched, and the locking units of the second side and the fourth side are matched.

[0012] In the above scheme, it is preferable that the locking units on the first side and the second side are staggered.

[0013] In the above scheme, it is preferable that the number of locking units on the first side and the second side are different.

[0014] In the above scheme, preferably, both the upper sand box and the lower sand box include several handles for lifting and placing.

[0015] The beneficial effects of this utility model are: by setting a first protrusion and a second protrusion in the upper sand box and the lower sand box, and by cooperating with the locking and control parts thereon, the upper and lower sand boxes can be quickly locked and unlocked. At the same time, by cooperating with locking units of different numbers or positions, the consistency of direction can be achieved, and the fault tolerance of misplacement can be improved under the action of the buffer spring. Attached Figure Description

[0016] Figure 1 This is a front perspective view of the present utility model.

[0017] Figure 2 This is a perspective view of the reverse side of this utility model.

[0018] Figure 3 This is a schematic diagram of the locking unit of this utility model.

[0019] Figure 4 This is a schematic diagram of the locking unit of this utility model in the unlocked state.

[0020] Figure 5 This is a schematic diagram of the locking state of the locking unit of this utility model. Detailed Implementation

[0021] The present invention will now be described in further detail with reference to the accompanying drawings and specific embodiments: See below Figures 1-5 The riserless sand mold structure for vortex shell casting includes an upper sand box 1 and a lower sand box 2. After the cavity of the vortex shell casting is formed in the sand box, the upper sand box 1 and the lower sand box 2 need to be closed before further casting. At the same time, because a riserless sand mold structure is used, the upper sand box 1 and the lower sand box 2 need to be tightly fitted to prevent gaps in the casting liquid.

[0022] A plurality of locking units 3 are provided between the upper sand box 1 and the lower sand box 2. Each locking unit 3 includes a control component 4 and a locking component 5. Specifically, the control component 4 is rotatable, and the locking component 5 is movable.

[0023] The upper sand box 1 is provided with a first protrusion 6, and the lower sand box 2 is provided with a second protrusion 7, wherein the control component 4 is provided on the second protrusion 7, and the locking component 5 is provided on the second protrusion 7.

[0024] A first rod is provided on the first protrusion 6, and the first rod is vertically connected to the first protrusion 6. At the same time, the locking member 5 slides on the first rod and is located above the first protrusion 6.

[0025] The second protrusion 7 is provided with a rotating shaft 8, which is rotatably connected to the second protrusion 7. At the same time, the rotating shaft 8 is connected to the control member 4 through the second rod. The control member 4 and the second rod rotate with the rotating shaft 8. Meanwhile, the diameter of the control member 4 is larger than that of the second rod.

[0026] To facilitate the rotation of the first rod, the first protrusion 6 and the second protrusion 7 are both provided with grooves. The grooves are used to place the first rod. Therefore, when the control member 4 rotates to contact the locking member 5, the locking member 5 is moved toward the first protrusion 6 until the first protrusion 6 and the second protrusion 7 are locked.

[0027] The first protrusion 6 of the upper sand box 1 and the second protrusion 7 of the lower sand box 2 are matched, that is, when the upper sand box 1 is stacked on top of the lower sand box 2, the first protrusion 6 and the second protrusion 7 are stacked.

[0028] A placement groove 10 is provided in the second protrusion 7, and a buffer spring 9 is provided in the placement groove 10. The buffer spring 9 is used to buffer the upper sand box 1 when it is placed, that is, when the upper sand box 1 is placed on the lower sand box 2, so that the two will not immediately close the mold. Instead, the buffer spring 9 temporarily separates them, which can prevent the upper sand box 1 from failing to close the mold due to being placed in the wrong horizontal direction when it is piled on the lower sand box 2.

[0029] Meanwhile, the upper sand box 1 includes a first side 11 and a second side 12, and the lower sand box 2 includes a third side 13 and a fourth side 14. The locking units 3 of the first side 11 and the third side 13 are matched and arranged, and the locking units 3 of the second side 12 and the fourth side 14 are matched and arranged.

[0030] Specifically, the positions and quantities of the locking units 3 on the first side 11, the third side 13, the second side 12, and the fourth side 14 are all set to match.

[0031] However, in order to prevent the upper sand box 1 from being placed in the wrong horizontal direction when it is stacked on the lower sand box 2, which could lead to mold closing failure.

[0032] Therefore, one approach is to set different numbers of locking units 3 on the first side 11 and the second side 12. For example, the first side 11 is provided with three sets of locking units 3, and the second side 12 is provided with two sets of locking units 3. If the wrong units are placed, the locking units 3 will not be able to lock.

[0033] Another approach is to set different numbers of locking units 3 on the first side 11 and the second side 12. The first side 11 is provided with one set of locking units 3, while the second side 12 is provided with two sets of locking units 3. This effectively prevents the upper sand box 1 from being placed in reverse. At the same time, the buffer spring 9 ensures that the upper sand box 1 and the lower sand box 2 will not close the mold when placed in reverse, thus providing fault tolerance.

[0034] Furthermore, the upper sand box 1 and the lower sand box 2 are provided with a number of handles 15 for lifting and placing, specifically the handles 15 are provided on the vertical surface of the side.

[0035] The above embodiments are only used to illustrate the technical solutions of this utility model, and are not intended to limit it. Although this utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of this utility model.

Claims

1. A riserless sand mold structure for vortex shell casting, comprising an upper sand box (1) and a lower sand box (2), characterized in that... A locking unit (3) is provided in the upper sand box (1) and the lower sand box (2). The locking unit (3) includes a rotatable control component (4) located on the lower sand box (2) and a movable locking component (5) located on the upper sand box (1). When the control component (4) rotates toward the upper sand box (1), the control component (4) drives the locking component (5) to move to lock the upper sand box (1) and the lower sand box (2).

2. The riserless sand mold structure for vortex shell castings according to claim 1, characterized in that... The upper sand box (1) is provided with a first protrusion (6), and the lower sand box (2) is provided with a second protrusion (7). When the upper sand box (1) and the lower sand box (2) are stacked, the first protrusion (6) and the second protrusion (7) are stacked.

3. The riserless sand mold structure for vortex shell castings according to claim 2, characterized in that: The second protrusion (7) is provided with a rotating shaft (8), and the control element (4) is connected to the rotating shaft (8) through the first rod.

4. The riserless sand mold structure for vortex shell castings according to claim 2 or 3, characterized in that: The first protrusion (6) and the second protrusion (7) are both provided with grooves to match the rotation of the first rod.

5. The riserless sand mold structure for vortex shell castings according to claim 4, characterized in that: A buffer spring (9) is provided on the first protrusion (6), and the buffer spring (9) is used to separate the upper sand box (1) and the lower sand box (2).

6. The riserless sand mold structure for vortex shell castings according to claim 5, characterized in that: The first protrusion (6) is provided with a placement groove (10), and a buffer spring (9) is provided in the placement groove (10).

7. The riserless sand mold structure for vortex shell castings according to claim 1 or 5, characterized in that: The upper sand box (1) includes a first side (11) and a second side (12), and the lower sand box (2) includes a third side (13) and a fourth side (14). The locking units (3) of the first side (11) and the third side (13) are matched and arranged, and the locking units (3) of the second side (12) and the fourth side (14) are matched and arranged.

8. The riserless sand mold structure for vortex shell castings according to claim 7, characterized in that: The locking units (3) of the first side (11) and the second side (12) are staggered.

9. The riserless sand mold structure for vortex shell castings according to claim 7, characterized in that: The number of locking units (3) on the first side (11) and the second side (12) is different.

10. The riserless sand mold structure for vortex shell castings according to claim 1, characterized in that: Both the upper sand box (1) and the lower sand box (2) include several handles (15) for lifting and placing.

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