A pattern repair tool for foundry sand molds

Abstract

The utility model relates to a kind of sand casting mould with profile tool, profile tool is applied to spherical casting production, profile tool includes: connecting rod;Cavity screed, cavity screed is spherical shell with spherical crown, cavity screed is fixedly installed in connecting rod rear, overall is dustpan-like;Runner screed, runner screed is spiral, it is made of sheet material winding.The main purpose of the utility model is to provide a kind of sand casting mould with profile tool, to adapt to the profile of the profiled casting grinding ball, improve work efficiency.

Description

Technical Field

[0001] This utility model relates to a finishing tool for casting, specifically a mold-repairing tool for casting sand molds. Background Technology

[0002] A pressure spoon is a tool for trimming molds in sand casting production. Existing pressure spoons have an arc-shaped surface at one end and a flat surface at the other end (such as the pressure spoon shown in Chinese Patent CN207239071U). This type of pressure spoon is more suitable when trimming flat surfaces or mold surfaces with a small curvature.

[0003] However, in the production process of casting grinding balls, because the cavity is spherical, when there are defects in the cavity, the pressure spoon with the above-mentioned structure needs to be used for repair, which requires multiple repairs to achieve a spherical cavity. Furthermore, when using the existing pressure spoon to repair the inside of the vertical runner, due to the curved surface of the pressure spoon, multiple repairs are also required to smooth the vertical runner, thereby preventing sand from flowing into the cavity with the molten iron. Utility Model Content

[0004] The main purpose of this utility model is to provide a molding tool for casting sand molds, so as to adapt to the molding cavity of casting grinding balls and improve work efficiency.

[0005] To achieve the above objectives, this utility model provides a mold-repairing tool for casting sand molds. The mold-repairing tool is applied in the production of spherical castings and includes: Connecting rod; Cavity smoother, the cavity smoother is a spherical shell with a crown shape, the cavity smoother is fixedly installed behind the connecting rod, and the whole is shaped like a scoop; The flow channel smoother is spiral-shaped and is made of rolled sheet metal.

[0006] Preferably, a connecting plate is fixedly provided on one side of the cavity smoother, and one end of the connecting rod is fixedly connected to the connecting plate.

[0007] Preferably, the connecting rod and the cavity smoother are not coaxial.

[0008] Preferably, one end of the flow channel smoother is fixedly provided with an end plate, and the side of the end plate away from the flow channel smoother is fixedly connected to the connecting rod.

[0009] The beneficial effects of this utility model are as follows: 1. Adapts to spherical cavities, improving trimming efficiency. The cavity smoother adopts a spherical shell structure with a crown shape, which is highly matched with the spherical cavity shape of the casting grinding ball. When repairing cavity defects, there is no need for repeated operations. The spherical cavity can be repaired in one or a few times by fitting the cavity curvature. This greatly reduces the repetitive work caused by the shape mismatch of the traditional pressure spoon and significantly improves the repair efficiency of spherical casting cavities.

[0010] 2. Optimize the flow channel dressing effect and reduce casting defects. The runner smoother is designed in a spiral shape (made from rolled sheet metal), and its shape is adapted to the inner wall structure of runners such as vertical runners. During use, it can more closely conform to the inner wall of the runner for finishing, quickly smoothing the inner wall and effectively preventing defects such as sand inclusions in the casting caused by sand flowing into the mold cavity with molten iron. It also reduces the repetitive steps of traditional runner finishing with a pressure ladle, improving the convenience and quality of runner finishing.

[0011] 3. The structure is reasonably designed and easy to operate. The cavity smoother is fixed to the connecting rod via a connecting plate. Its overall shape resembles a sieve, ensuring a good fit to the cavity while allowing for easy application of pressure by holding the connecting rod for finishing operations. Simultaneously, the sieve-shaped cavity smoother can be used to remove sand for cavity repair. Attached Figure Description

[0012] The present invention will now be described in further detail with reference to the accompanying drawings and specific embodiments.

[0013] Figure 1 This is a three-dimensional structural diagram of the shaping tool of this utility model; Figure 2 This is a front view of the shaping tool of this utility model; Figure 3 This is a top view of the flow channel smoother of the shaping tool of this utility model.

[0014] Explanation of reference numerals in the attached figures 10. Cavity smoother; 11. Connecting plate; 20. Runner smoother; 21. End plate; 30. Connecting rod. Detailed Implementation

[0015] The technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Many specific details are set forth in the following description to provide a full understanding of the present invention. However, the present invention may also be implemented in other ways different from those described herein. Those skilled in the art can make similar extensions without departing from the spirit of the present invention. Therefore, the present invention is not limited to the specific embodiments disclosed below.

[0016] like Figure 1 As shown, this embodiment provides a molding tool for casting sand molds, which is applied in the production of spherical castings, such as the molding of sand molds for casting grinding balls. Specifically, the molding tool includes a connecting rod 30, a cavity smoother 10, and a runner smoother 20, wherein the cavity smoother 10 and the runner smoother 20 are respectively fixedly disposed at both ends of the connecting rod 30.

[0017] Preferably, in this embodiment, both the connecting rod 30 and the cavity smoother 10 are made of medium chromium cast iron, because medium chromium cast iron has a certain anti-corrosion effect.

[0018] In this embodiment, as Figure 1 and Figure 2 As shown, the cavity smoother 10 has a spherical shell with a crown shape. The cavity smoother 10 is fixedly installed behind the connecting rod 30, and its overall shape resembles a scoop. During production, the scoop-shaped cavity smoother 10 can be used to scoop and transport molding sand for shaping. Preferably, a connecting plate 11 is fixedly provided on one side of the cavity smoother 10, and one end of the connecting rod 30 is fixedly connected to the connecting plate 11.

[0019] In addition, in order to facilitate the application of pressure by hand on the connecting rod 30 for trimming operations, the spherical smoother and the connecting rod 30 in this embodiment are non-coaxial.

[0020] like Figure 1 and Figure 3 As shown, the runner smoother 20 is spiral-shaped and is made of rolled stainless steel sheet, or it can be integrally cast from medium chromium cast iron. Preferably, one end of the runner smoother 20 is fixedly provided with an end plate 21, and the side of the end plate 21 away from the runner smoother 20 is fixedly connected to the connecting rod 30. In this embodiment, the runner smoother 20 is connected to the connecting rod 30 through the end plate 21, which makes the structure stable. The connecting rod 30 can be held by hand to penetrate into the runner for spiral trimming, making the operation flexible and labor-saving.

[0021] Obviously, the described embodiments are only some, not all, of the embodiments of this utility model. All other embodiments obtained by those skilled in the art based on the embodiments of this utility model without inventive effort are within the scope of protection of this utility model.

Claims

1. A molding tool for repairing casting sand molds, characterized in that, The shaping tool is used in the production of spherical castings, and the shaping tool includes: Connecting rod; A cavity smoother, wherein the cavity smoother is a spherical shell in the shape of a spherical crown, and the cavity smoother is fixedly installed behind the connecting rod, and the whole is shaped like a scoop; A flow channel smoother, which is spiral in shape and is made of rolled sheet metal.

2. The molding tool for casting sand molds according to claim 1, characterized in that, A connecting plate is fixedly provided on one side of the cavity smoother, and one end of the connecting rod is fixedly connected to the connecting plate.

3. A molding tool for casting sand molds according to claim 1, characterized in that, The connecting rod is not coaxial with the cavity smoother.

4. A molding tool for casting sand molds according to claim 1, characterized in that, One end of the flow channel smoother is fixedly provided with an end plate, and the side of the end plate away from the flow channel smoother is fixedly connected to the connecting rod.

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