A core box and sand core assembly for pre-embedded screw

Abstract

The utility model discloses a core box and sand core assembly of a pre-embedded screw, wherein pre-embedded screws are pre-embedded at the top surfaces of both ends of the lower half cavity of the crankshaft core, so that the two ends of the crankshaft core solidified in the core box are respectively fixed with the pre-embedded screws, and the pre-embedded screws at both ends can be assembled and fixed with two side cores respectively, so that there is no need to assemble the core in a way that a long screw is provided to pass through each sand core in sequence as in the prior art, which not only reduces the cost of the screw components, but also avoids the problem of low core assembly efficiency of the long screw.

Description

Technical Field

[0001] The utility model relates to the technical field of sand core manufacturing, in particular to a core box component used for sand core manufacturing and the obtained sand core component. Background Art

[0002] Please combine Figures 1 to 3 As shown, in the casting process, screws are required to assemble the solidified sand cores between the sand cores to form a sand core group. Figure 1 The figure shows a crankshaft core 1' and side cores 2' located at both ends of the crankshaft core. The crankshaft core 1' and the side core 2' are connected by the following method: Figure 2 The long screw 3' shown in the figure passes through the crank core 1' and the side core at the other end in sequence from the side core 2' at one end, and then all the sand cores are assembled and fixed by the nut 4'. The disadvantages of this core assembly method are: due to the need to use a long screw, sometimes the overall width of the sand core group is large, resulting in a long screw length and high cost. In addition, since the long screw needs to maintain a stable position when punching each sand core when passing through each sand core, if the long screw deviates from the axis when punching, it will cause the next hole to be unable to align and pass through, and it needs to be readjusted, which reduces the efficiency of sand core assembly.

[0003] Therefore, a new technical solution is needed to solve the above problems. Utility Model Content

[0004] In order to solve the problems caused by the prior art, the utility model provides a core box with a pre-embedded screw to replace the long screw in the prior art, and reduces the cost and improves the core assembly efficiency by arranging short screws on both sides of the crankshaft core.

[0005] The utility model also provides a sand core assembly, which also reduces the cost and improves the core assembly efficiency by arranging short screws on both sides of the crankshaft core.

[0006] In order to achieve the above-mentioned purpose, the core box of the utility model embedded screw can adopt the following technical scheme:

[0007] A core box for embedding a screw, comprising an upper core box, a lower core box and an embedded screw, wherein the upper core box is provided with at least one upper half cavity of a crank core; the lower core box is provided with at least one lower half cavity of a crank core, the two ends of the lower half cavity of the crank core are top surfaces that fit with the upper core box, the top surface is concavely provided with an embedded groove, one end of the thread of the embedded screw is placed in the embedded groove, and the other end of the embedded screw extends into the range of the lower half cavity of the crank core; after the upper core box is docked with the lower core box, one end of the thread of the embedded screw is squeezed between the embedded groove and the upper core box.

[0008] Furthermore, the lower core box is provided with two parallel lower half cavities of the crankshaft core, and both ends of each lower half cavity of the crankshaft core are provided with embedded screws, and all the embedded screws are coaxially placed.

[0009] Beneficial effect: Compared with the prior art, the core box provided by the utility model pre-embeds pre-embedded screws at the top surfaces of both ends of the lower half cavity of the crankshaft core, so that the two ends of the crankshaft core solidified in the core box are respectively fixed with pre-embedded screws, and the pre-embedded screws at both ends can be assembled and fixed with the two side cores respectively, thereby eliminating the need to provide a long screw to pass through each sand core in turn to assemble the core as in the prior art. This not only reduces the cost of the screw components, but also avoids the problem of low core assembly efficiency of the long screw.

[0010] The utility model also provides a sand core assembly, including a crankshaft core made from the core box of the pre-embedded screw, and also including side cores installed at both ends of the crankshaft core; each side core is provided with a through hole for the pre-embedded screw to pass through, and after the pre-embedded screw passes through the side core, the side core is connected and fixed to the crankshaft core by a nut.

[0011] The sand core assembly does not require the long screw in the prior art, and the short screws pre-buried at both ends of the crankshaft core can be respectively assembled and fixed with the side cores on both sides, thereby reducing the screw cost and improving the assembly efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] Figure 1 It is a schematic diagram of a crankshaft core and a side core that need to be assembled in the prior art;

[0013] Figure 2 It is a schematic diagram of a long screw and a nut provided for a core assembly in the prior art;

[0014] Figure 3 It is a schematic diagram of a crankshaft core and a side core being fixed by a long screw and a nut combination in the prior art;

[0015] Figure 4 This is a schematic diagram of the structure of the lower core box and the embedded screw rod of the utility model;

[0016] Figure 5 It is a schematic diagram of the utility model after the embedded screw is placed in the lower core box.

[0017] Figure 6 It is a schematic diagram of a crankshaft core with embedded screws at both ends made by a lower core box.

[0018] Figure 7 It is a schematic diagram of the crankshaft core and the side core in the present invention when they are not assembled.

[0019] Figure 8 It is a schematic diagram of the crankshaft core and the side core of the utility model after being fixed together by embedded screws. DETAILED DESCRIPTION

[0020] The present invention is further explained below in conjunction with the accompanying drawings and specific implementation methods. It should be understood that the following specific implementation methods are only used to illustrate the present invention and are not used to limit the scope of the present invention. After reading the present invention, various equivalent forms of modifications to the present invention by those skilled in the art all fall within the scope defined by the claims attached to this application.

[0021] See also Figure 4 As shown, the utility model discloses a core box with embedded screw, including an upper core box (not shown), a lower core box 1 and an embedded screw 2. The upper core box is provided with at least one upper half cavity of a crank core. The lower core box 1 is provided with at least one lower half cavity 11 of a crank core. The upper and lower core boxes have exactly the same structure and form a complete internal crank core cavity after docking, so only the lower core box 1 is shown in the attached figure.

[0022] like Figure 5 As shown, the two ends of the lower half cavity 11 of the crankshaft core are top surfaces 12 that fit with the upper core box, and the top surface is concavely provided with an embedded groove 13, and one end of the thread of the embedded screw 2 is placed in the embedded groove 13, and the other end of the embedded screw 2 extends into the range of the lower half cavity 11 of the crankshaft core. After the upper core box and the lower core box are docked, one end of the thread of the embedded screw 2 is squeezed between the embedded groove 13 and the upper core box. In this embodiment, the lower core box is provided with two parallel lower half cavities of the crankshaft core, and embedded screws are provided at both ends of each lower half cavity of the crankshaft core, and all the embedded screws are coaxially placed, so that the crankshaft cores made at the same time have the same specifications.

[0023] Combination Figures 6 to 8 As shown, after the crankshaft core 3 with the screw rod 2 embedded in it is obtained by the core box, the crankshaft core 3 is assembled with the side cores 4 at both ends. Each side core 4 is provided with a through hole for the embedded screw rod 2 to pass through, and after the embedded screw rod 2 passes through the side core 4, the side core 4 is connected and fixed to the crankshaft core 3 by a nut 5.

[0024] The sand core assembly does not require the long screw in the prior art, and the short screws pre-buried at both ends of the crankshaft core can be respectively assembled and fixed with the side cores on both sides, thereby reducing the screw cost and improving the assembly efficiency.

Claims

1. A core box for pre-embedded screws, characterized in that: It includes an upper core box, a lower core box and an embedded screw, the upper core box is provided with at least one upper half cavity of the crankshaft core; the lower core box is provided with at least one lower half cavity of the crankshaft core, the two ends of the lower half cavity of the crankshaft core are top surfaces that fit with the upper core box, the top surface is concavely provided with an embedded groove, one end of the thread of the embedded screw is placed in the embedded groove, and the other end of the embedded screw extends into the range of the lower half cavity of the crankshaft core; after the upper core box is docked with the lower core box, one end of the thread of the embedded screw is squeezed between the embedded groove and the upper core box.

2. The core box of the embedded screw according to claim 1, characterized in that: The lower core box is provided with two parallel crankshaft core lower half cavities, and both ends of each crankshaft core lower half cavity are provided with embedded screws, and all the embedded screws are coaxially placed.

3. A sand core assembly, comprising a crankshaft core made using the core box with embedded screw according to claim 1 or 2, characterized in that: It also includes side cores installed at both ends of the crankshaft core; each side core is provided with a through hole for the embedded screw to pass through, and the embedded screw passes through the side core and then connects and fixes the side core to the crankshaft core through a nut.

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