Spheroidized steel plate for casting molding device and its preparation using method

Abstract

Provided are a molding device for casting spheroidized steel plate and a preparation method thereof, comprising a spheroidized steel plate mold and a frameless core box for preparing the spheroidized steel plate mold; the frameless core box comprises a main body and a movable block, the main body is a box-shaped structure with an open upper end, a convex surface with the same shape as the spheroidized steel plate to be prepared is centrally formed on the inner bottom surface of the main body, the movable block is inserted into the main body in a head-to-tail manner and is attached to each inner side wall of the main body, a frame-type keel is centrally arranged in the main body, and after the frame-type keel is wrapped in the interior of the main body and solidified by refractory cement, a spheroidized steel plate mold with a pouring groove is formed. The frameless core box is designed, and the optimized spheroidized steel plate casting mold is prepared by means of the frameless core box, so that the production process of the spheroidized steel plate is optimized, the manual working time is reduced, the use of raw materials and production tooling is reduced, the production cost is reduced, the production efficiency is improved, and the output of the spheroidized steel plate can meet the needs of workshop production.

Description

Technical Field

[0001] This invention belongs to the field of spheroidized steel plate preparation technology, specifically relating to a mold-making device for casting spheroidized steel plates and its preparation and usage method. Background Technology

[0002] Currently, in the industrial production of ductile iron castings both domestically and internationally, the spheroidizing treatment is mostly achieved through the molten iron pouring method. To control the start time of spheroidizing inoculation, a layer of iron plate, i.e., a spheroidizing steel plate, needs to be covered on the spheroidizing agent in the ladle. The traditional process for preparing spheroidizing steel plates is a resin sand core molding process. First, a spheroidizing steel plate sand core is prepared. After the sand core is prepared, the core is assembled and fitted into the mold, and finally, the casting is performed. See [link to relevant documentation]. Figure 5 As shown, after the spheroidized steel plate solidifies and cools, it undergoes processes such as boxing and cleaning to obtain qualified spheroidized steel plates. Although multiple spheroidized steel plates can be prepared at one time, the preparation process is cumbersome, the preparation cycle is long, and it is impossible to accurately control the required preparation quantity. Therefore, it is necessary to improve the process to address the above problems. Summary of the Invention

[0003] The technical problem solved by this invention is to provide a mold-making device for casting spheroidized steel plates and its preparation and use method. By designing a frameless core box and using the frameless core box to prepare an optimized spheroidized steel plate casting mold, the production process of spheroidized steel plates is optimized, reducing manual working time, reducing the use of raw materials and production tooling, thereby achieving the purpose of reducing production costs and improving production efficiency, so that the output of spheroidized steel plates can meet the production needs of the workshop.

[0004] The technical solution adopted in this invention is: a mold-making device for casting spheroidized steel plates, including a spheroidized steel plate mold and a frameless core box for preparing the spheroidized steel plate mold; the frameless core box includes a main body and movable blocks, the main body is a box-shaped structure with an open top, and a convex surface with the same shape as the spheroidized steel plate to be prepared is formed in the center of the bottom surface of the main body. Movable blocks that are connected end to end and fit against the inner side walls of the main body are inserted inside the main body. A frame-type keel is provided in the center of the main body, and the refractory cement poured into the main body wraps the frame-type keel inside and solidifies to form a spheroidized steel plate mold with a casting groove.

[0005] The frame-type keel includes a keel frame and leveling rings. Three leveling rings are fixed on the bottom edge of the keel frame. The bottom surface of the main body is provided with a ring seat that corresponds to the upper and lower positions of the leveling rings and has a sleeve-shaped structure. The leveling rings are inserted into the ring seat, and resin sand is filled into the ring seat before pouring refractory cement.

[0006] Furthermore, the inner wall of the main body is an inclined surface that slopes towards the outer wall, and the outer wall surface of the movable block is an inclined surface that matches the corresponding inner wall of the main body.

[0007] Furthermore, a release agent is applied to the bottom surface of the main body and the inner wall of the movable block.

[0008] Furthermore, two lifting rings for rapid demolding of the spheroidized steel plate are evenly distributed in the center of the surface of the casting groove.

[0009] The preparation and use method of the mold-making device for casting spheroidizing steel plates includes the following steps:

[0010] 1) Apply a release agent to the inner surface of the frameless core box containing the main body and the movable block, and place three lifting ring seats distributed at the vertices of the triangle and coated with release agent on the outer surface of the bottom of the frameless core box. Place the keel frame into the frameless core box, and insert the three leveling lifting rings fixed on the bottom surface of the keel frame into the corresponding lifting ring seats. Then fill the three lifting ring seats with resin sand in sequence.

[0011] 2) Pour refractory cement into the frameless core box. The upper surface of the poured refractory cement is flush with the upper surface of the frameless core box. At this time, the keel frame is completely wrapped by the refractory cement. After the refractory cement solidifies, remove the formwork.

[0012] 3) After demolding, remove the resin sand, remove the movable block and the lifting ring seat to form a spheroidized steel plate mold. Repair the pits on the working surface of the spheroidized steel plate mold and then apply paint. At this time, the spheroidized steel plate mold is completed, and the leveling lifting ring is located in the round hole formed by the lifting ring seat on the spheroidized steel plate mold.

[0013] 4) Adjust the spheroidized steel plate mold to a horizontal position using three leveling rings. Finally, place the demolding ring vertically inside the pouring trough.

[0014] 5) Pour the molten iron directly into the pouring tank of the spheroidizing steel plate mold. After the molten iron solidifies, use the mold lifting ring, which is integrated with the solidified molten iron, to remove the spheroidizing steel plate from the mold and obtain a qualified spheroidizing steel plate.

[0015] Advantages of this invention compared to existing technologies:

[0016] 1. This technical solution optimizes the production process of spheroidized steel plates by designing a frameless core box and using the frameless core box to prepare an optimized casting mold for spheroidized steel plates. This reduces manual labor time, the use of raw materials and production tooling, thereby achieving the goal of reducing production costs and improving production efficiency, so that the output of spheroidized steel plates can meet the production needs of the workshop.

[0017] 2. In this technical solution, the inner wall of the main body is designed as an inclined surface that slopes outward, and the outer wall surface of the movable block is an inclined surface that matches the corresponding inner wall of the main body. The spheroidized steel plate mold facilitates demolding, and the movable block is sunk into the main body and set to fit the inner wall of the main body, which facilitates demolding and also serves to position the movable block.

[0018] 3. In this technical solution, a frame-type core is placed in the spheroidizing steel plate mold during the casting and preparation process to improve the strength of the spheroidizing steel plate mold and increase the number of times the spheroidizing steel plate mold can be reused, thereby reducing production costs.

[0019] 4. The spheroidizing steel plate mold of this technical solution has a built-in leveling lifting ring, which makes it easy to level the spheroidizing steel plate mold when placing it, and prevents molten iron from overflowing from one side due to uneven placement of the spheroidizing steel plate mold when pouring the spheroidizing steel plate.

[0020] 5. This technical solution simplifies the preparation process of spheroidized steel plates, has a simple structure and novel design, and allows for precise control of the number of spheroidized steel plates prepared, greatly reducing the preparation cycle and making it highly valuable. Attached Figure Description

[0021] Figure 1 This is a schematic diagram of the structure of the frameless core box and the keel after assembly according to the present invention;

[0022] Figure 2 This is a front view of the frameless core box structure of the present invention;

[0023] Figure 3 for Figure 2 Sectional view of AA;

[0024] Figure 4 This is a schematic diagram of the three-dimensional structure of the spheroidizing steel plate mold of the present invention;

[0025] Figure 5 A schematic diagram of the structure of a mold for preparing existing spheroidized steel plates. Detailed Implementation

[0026] The following will be based on embodiments of the present invention. Figure 1-4 The technical solutions in the embodiments of the present invention are clearly and completely described herein. Obviously, the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the scope of protection of the present invention.

[0027] It should be noted that, in this document, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Without further limitations, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes said element.

[0028] A molding device for casting spheroidizing steel plates includes a spheroidizing steel plate mold 1 and a frameless core box 2 for preparing the spheroidizing steel plate mold 1. The frameless core box 2 includes a main body 2-1 and movable blocks 2-2. The main body 2-1 is a box-shaped structure with an open top. A convex surface 2-3 of the same shape as the spheroidizing steel plate to be prepared is centrally formed on the bottom surface of the main body 2-1. Movable blocks 2-2, which are connected end to end and fit against the inner side walls of the main body 2-1, are inserted inside the main body 2-1. A frame-like keel is centrally provided inside the main body 2-1. 3. The refractory cement poured into the main body 2-1 encapsulates the frame keel 3 and solidifies to form a spheroidized steel plate mold 1 with a pouring groove 1-1. In the above structure, by designing a frameless core box 2 and using the frameless core box 2 to prepare an optimized spheroidized steel plate casting mold 1, the production process of spheroidized steel plate is optimized, reducing manual working time, reducing the use of raw materials and production tooling, thereby achieving the purpose of reducing production costs and improving production efficiency, so that the output of spheroidized steel plate can meet the production needs of the workshop.

[0029] The specific structure of the frame-type keel 3 is as follows: The frame-type keel 3 includes a keel frame 3-1 and leveling rings 3-2. Three leveling rings 3-2 are fixed on the bottom edge of the keel frame 3-1. The inner bottom surface of the main body 2-1 is provided with a ring seat 4 that corresponds to the upper and lower positions of the leveling rings 3-2 and has a sleeve-like structure. The leveling rings 3-2 are inserted into the ring seat 4, and resin sand is filled into the ring seat 4 before pouring refractory cement. In the above structure, the frame-type core 3 is placed in the spheroidizing steel plate mold 1 during casting preparation to improve the strength of the spheroidizing steel plate mold 1 and increase the number of times the spheroidizing steel plate mold 1 can be reused, thereby reducing production costs.

[0030] To facilitate demolding, the inner wall of the main body 2-1 is designed as an inclined surface sloping outwards, and the outer wall of the movable block 2-2 is an inclined surface adapted to the corresponding inner wall of the main body 2-1. In the above structure, the inner wall of the main body 2-1 and the outer wall of the movable block 2-2 are designed to be mutually attached and inclined outwards, which makes it easy to demold the spheroidizing steel plate mold 1. The movable block 2-2 sinks into the main body and is set to fit the inner wall of the main body 2-1, which facilitates demolding and also serves to position the movable block 2-2. Specifically, the inner bottom surface of the main body 2-1 and the inner wall of the movable block 2-2 are coated with a release agent to improve the surface flatness of the spheroidizing steel plate mold 1, facilitate the demolding of the spheroidizing steel plate, and help control the appearance quality of the spheroidizing steel plate.

[0031] To facilitate the demolding of the spheroidized steel plate after the molten iron has hardened, two demolding rings 1-2 are evenly distributed in the center of the surface of the pouring trough 1-1 for quick demolding of the spheroidized steel plate.

[0032] The preparation and use method of the mold-making device for casting spheroidizing steel plates includes the following steps:

[0033] 1) Apply a release agent to the inner surface of the frameless core box 2, which includes the main body 2-1 and the movable block 2-2, and place three lifting ring seats 4 distributed at the vertices of the triangle and coated with release agent on the outer surface of the bottom surface of the frameless core box 2. Place the keel frame 3-1 into the frameless core box 2, so that the three leveling lifting rings 3-2 fixed on the bottom surface of the keel frame 3-1 are inserted into the corresponding lifting ring seats 4, and fill the three lifting ring seats 4 with resin sand in sequence.

[0034] 2) Pour refractory cement into the frameless core box 2. The upper surface of the poured refractory cement is flush with the upper surface of the frameless core box 2. At this time, the keel frame 3-1 is completely wrapped by the refractory cement. After the refractory cement solidifies, the mold is removed. Using refractory cement material as the molding material allows the spheroidized steel plate mold 1 to be reused, thereby reducing production costs.

[0035] 3) After demolding, remove the resin sand, remove the movable block 2-2 and the lifting ring seat 4 to form the spheroidized steel plate mold 1. Repair the pits on the working surface of the spheroidized steel plate mold 1 and then apply paint. At this time, the spheroidized steel plate mold 1 is completed. The leveling lifting ring 3-2 is located in the round hole formed by the lifting ring seat 4 on the spheroidized steel plate mold 1. The prepared spheroidized steel plate mold 1 has a built-in leveling lifting ring 3-2, which facilitates the leveling of the spheroidized steel plate mold 1 when it is placed, and prevents molten iron from overflowing from one side when pouring the spheroidized steel plate due to uneven placement of the spheroidized steel plate mold 1.

[0036] 4) Adjust the spheroidized steel plate mold 1 to a horizontal position using three leveling rings 3-2. Finally, place the mold lifting ring 1-2 vertically inside the pouring trough 1-1.

[0037] 5) Pour the molten iron directly into the pouring tank 1-1 of the spheroidized steel plate mold 1. After the molten iron solidifies, use the mold lifting ring 1-2, which is integrated with the solidified molten iron, to remove the spheroidized steel plate and obtain a qualified spheroidized steel plate.

[0038] This technical solution simplifies the preparation process of spheroidized steel plates, has a simple structure and novel design, allows for precise control of the number of spheroidized steel plates prepared, significantly reduces the preparation cycle, and has high application value.

[0039] It will be apparent to those skilled in the art that the present invention is not limited to the details of the exemplary embodiments described above, and that the invention can be implemented in other specific forms without departing from its spirit or essential characteristics. Therefore, the embodiments should be considered in all respects as exemplary and non-limiting, and the scope of the invention is defined by the appended claims rather than the foregoing description. Thus, all variations falling within the meaning and scope of equivalents of the claims are intended to be included within the present invention. No reference numerals in the claims should be construed as limiting the scope of the claims.

[0040] Furthermore, it should be understood that although this specification describes embodiments, not every embodiment contains only one independent technical solution. This narrative style is merely for clarity. Those skilled in the art should consider the specification as a whole, and the technical solutions in each embodiment can also be appropriately combined to form other embodiments that can be understood by those skilled in the art.

Claims

1. A mold-making device for casting spheroidized steel plates, characterized in that: The application relates to a spheroidizing steel plate mold (1) and a frameless core box (2) for preparing the spheroidizing steel plate mold (1), wherein the frameless core box (2) comprises a main body (2-1) and a movable block (2-2), the main body (2-1) is a trapezoidal box-shaped structure with an open upper end, a convex surface (2-3) with the same shape as a spheroidizing steel plate to be prepared is arranged in the middle of the inner bottom surface of the main body (2-1), positioning grooves are arranged in the main body (2-1) along the inner bottom surface and are connected with each other and have inclined outer sidewalls, the movable block (2-2) is inserted into the positioning grooves in the main body (2-1) and is connected with each inner sidewall of the main body (2-1), a frame-shaped keel (3) is arranged in the middle of the main body (2-1), and the frame-shaped keel (3) is wrapped in the refractory cement poured into the main body (2-1) and is solidified to form the spheroidizing steel plate mold (1) with a pouring groove (1-1). The frame-shaped keel (3) comprises a keel frame (3-1) and leveling lifting rings (3-2), three leveling lifting rings (3-2) are fixed to the bottom edge of the keel frame (3-1), lifting ring seats (4) corresponding to the positions of the leveling lifting rings (3-2) and in sleeve-shaped structures are arranged on the inner bottom surface of the main body (2-1), the leveling lifting rings (3-2) are inserted into the lifting ring seats (4) and are filled with resin sand in the lifting ring seats (4) before the refractory cement is poured.

2. The spheroidizing steel plate casting molding apparatus according to claim 1, characterized by: The inner sidewalls of the main body (2-1) are inclined surfaces inclined towards the outer wall direction, and the outer wall surface of the movable block (2-2) is an inclined surface matched with the corresponding inner sidewall of the main body (2-1).

3. The spheroidizing steel plate casting molding apparatus according to claim 1 or 2, characterized by: The inner bottom surface of the main body (2-1) and the inner wall of the movable block (2-2) are coated with a release agent.

4. The spheroidizing steel plate casting molding apparatus according to claim 3, characterized by: Two demolding lifting rings (1-2) for quickly demolding the spheroidizing steel plate are uniformly arranged in the middle of the groove surface of the pouring groove (1-1).

5. A method of using a spheroidal steel plate casting mold apparatus, characterized by The application further relates to a preparation method of the spheroidizing steel plate mold (1), and the method comprises the following steps: 1) a release agent is coated on the inner surface of the prepared frameless core box (2) comprising the main body (2-1) and the movable block (2-2), three lifting ring seats (4) coated with the release agent and distributed at the apexes of a triangle are arranged on the inner bottom surface of the frameless core box (2), the keel frame (3-1) is put into the frameless core box (2), the three leveling lifting rings (3-2) fixed to the bottom surface of the keel frame (3-1) are respectively inserted into the corresponding lifting ring seats (4), and the three lifting ring seats (4) are sequentially filled with resin sand; 2) the refractory cement is poured into the frameless core box (2), the upper surface of the poured refractory cement is flush with the upper surface of the frameless core box (2), at this moment, the keel frame (3-1) is completely wrapped by the refractory cement, and the mold is demolded after the refractory cement is solidified; 3) after the mold is demolded, the resin sand is removed, the movable block (2-2) and the lifting ring seat (4) are removed, the spheroidizing steel plate mold (1) is formed, the surface of the working surface of the spheroidizing steel plate mold (1) is repaired, and the coating is brushed, at this moment, the spheroidizing steel plate mold (1) is prepared, and the leveling lifting rings (3-2) are located in the round holes formed by the lifting ring seats (4) in the spheroidizing steel plate mold (1); 4) the spheroidizing steel plate mold (1) is leveled to be horizontal through the three leveling lifting rings (3-2), and finally, the demolding lifting rings (1-2) are vertically arranged in the pouring groove (1-1). 5) directly pouring the molten iron into the pouring groove (1-1) of the spheroidizing steel plate mold (1), and after the molten iron solidifies, using the mold lifting ring (1-2) integrated with the solidified molten iron to lift the mold to obtain qualified spheroidizing steel plate.

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