Roller casting sand box mold
By designing a roll cast sand box mold including a sand box mold body, an insulation riser box and a flange, the problems of large impact force of the steel and waste slag in the prior art are solved, better insulation and sealing effects are achieved, the solidification sequence is controlled, and product quality and production pass rate are improved.
Patent Information
- Application Number
- CN202421553891.9
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-07-03
- Publication Date
- 2025-06-17
- Estimated Expiration
- 2034-07-03
AI Technical Summary
During the casting process of existing roll casting molds, the steel directly enters the mold cavity from the upper part, resulting in a large impact force, which easily damages the bottom of the mold cavity, and waste slag is easily left during pouring, affecting the strength of the roll and product quality.
A roll cast sand box mold is designed, including the sand box mold body, insulation riser box and flange. By setting the molten iron entry port, insulation riser box and flange, the insulation performance and sealing performance are increased, the solidification order of the molten iron is controlled, and the molding sand is supported by the iron rod for separation.
It effectively reduces the heat dissipation of the molten iron in the box, controls the solidification order of each part in the roll casting, improves product quality and production pass rate, and simplifies the separation process between sand and insulation riser box.
Smart Images
Figure CN222985653U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the field of sand box molds, in particular to a roller casting sand box mold. Background Art
[0002] Rollers are important components of rolling forming. Rollers need to withstand large rolling forces during the rolling process. Therefore, the production of rolls is done by one-time casting. Roller production is cast through a roll casting mold. The roll casting mold includes a runner and a roll cavity. Currently, a known roll casting mold is provided with a gate at the top, and the gate is directly connected to the top of the roll cavity. Molten steel enters the mold from the gate and gradually fills the mold. In order to prevent the molten steel from shrinking in volume after casting, so that the casting cannot meet the requirements, a certain amount of molten steel is injected into the gate for filling.
[0003] The disadvantage of the above-mentioned roller casting mold is that since the molten steel enters the roller cavity directly from the top and rushes directly to the bottom of the roller cavity, the mass of the molten steel is large, and the impact force generated is large, which can easily damage the bottom of the roller cavity, thereby reducing the quality of the product and the production qualification rate. At the same time, since the molten steel enters the cavity from the top, some waste slag will be left in the molten steel during pouring, making the strength of the cast roller very unsatisfactory, affecting the quality of the product.
[0004] With the advancement of technology, the use of sand boxes as molds has become more and more widespread. However, during the casting process of rolling mill rolls, the molding sand partially crystallizes at high temperatures, which strengthens the adhesion of the sand and makes it difficult to separate the cast rolling mill rolls from the original sand box. At the same time, the rolling mill rolls change from liquid to solid during casting. If the solidification sequence cannot be controlled, the stress in the liquid-solid transformation is easily increased, thereby causing product defects.
[0005] Currently, no effective solution has been proposed for the problems in the related technologies. Utility Model Content
[0006] In view of the problems in the related technology, the utility model proposes a roller casting sand box mold to overcome the above technical problems existing in the existing related technology.
[0007] To this end, the specific technical solutions adopted by the utility model are as follows:
[0008] A roller casting sand box mold comprises a sand box mold body, a molten iron inlet is arranged on one side of the bottom end of the sand box mold body, an insulating riser box is sleeved on the outer side of the sand box mold body, and flanges matching the sand box mold body are arranged at both ends of the insulating riser box; a cavity is opened inside the sand box mold body, box handles are arranged at both ends of the insulating riser box, and a retaining ring is arranged on the side of the box handle away from the insulating riser box.
[0009] Furthermore, in order to increase the time for iron to change from liquid to solid and accelerate the separation time of the molding sand from the inside of the riser box, an installation cavity is provided on the inner wall of the riser box, heat insulation cotton is placed inside the installation cavity, and air vents are provided at the bottom end of the outer side of the riser box.
[0010] Furthermore, in order to improve the sealing performance of the riser box and ensure the heat insulation effect of the riser box, a box body protective ring is provided on the outer side of the flange.
[0011] Furthermore, in order to reduce the heat dissipation of the molten iron in the box and slow down the liquid-solid transformation, thereby controlling the solidification sequence of each part in the roll casting, a gap is provided between the riser box and the sand box mold body, and molding sand is provided inside the gap.
[0012] The beneficial effects of the present utility model are as follows: In the sand box mold body of the present utility model, a layered cavity is designed for heat preservation. There is a space for placing asbestos in the layered cavity, which provides heat preservation performance for the sand box mold body, reduces the heat dissipation of the molten iron in the box, slows down the liquid-solid transformation, thereby controlling the solidification sequence of each part in the roll casting. At the same time, the sand supporting ring at the lower end of the sand box mold body is removed, and an iron rod is used to support the molding sand. After casting is completed, the iron rod is pulled out to remove the support for the molding sand, making it easier to separate the sand from the riser box. Description of the Drawings
[0013] In order to more clearly illustrate the technical solutions in the embodiments of the present utility model or the prior art, the following will briefly introduce the drawings required for use in the embodiments. Obviously, the drawings described below are only some embodiments of the present utility model. For those of ordinary skill in the art, other drawings can be obtained based on these drawings without creative efforts.
[0014] Figure 1 is a schematic structural diagram of a roll casting sand box mold according to an embodiment of the present utility model;
[0015] Figure 2 is a schematic structural diagram of a riser box in a roll casting sand box mold according to an embodiment of the present utility model.
[0016] In the figure:
[0017] 1. Sand box mold body; 2. Molten iron inlet; 3. Riser box; 4. Flange; 5. Cavity; 6. Box handle; 7. Retaining ring; 8. Installation cavity; 9. Heat insulation cotton; 10. Air vent; 11. Box body protective ring; 12. Gap; 13. Molding sand. Detailed Embodiments
[0018] To further illustrate each embodiment, the present utility model provides attached drawings, which are part of the disclosure of the present utility model. These drawings are mainly used to illustrate the embodiments and can be combined with the relevant descriptions in the specification to explain the operating principles of the embodiments. With reference to these contents, those of ordinary skill in the art should be able to understand other possible implementation manners and the advantages of the present utility model. The components in the drawings are not drawn to scale, and similar component symbols are usually used to represent similar components.
[0019] According to an embodiment of the present utility model, a roll casting sand box mold is provided.
[0020] Now, the present utility model will be further described in conjunction with the attached drawings and specific implementation manners. As Figure 1 - Figure 2 shown, the roll casting sand box mold according to an embodiment of the present utility model includes a sand box mold body 1. One side of the bottom end of the sand box mold body 1 is provided with a molten iron inlet 2. A heat preservation riser box 3 is sleeved outside the sand box mold body 1. Flanges 4 that cooperate with the sand box mold body 1 are provided at both ends of the heat preservation riser box 3. A cavity 5 is formed inside the sand box mold body 1. Handles 6 are provided at both ends of the heat preservation riser box 3. A retaining ring 7 is provided on the side of the handle 6 away from the heat preservation riser box 3.
[0021] With the aid of the above technical solution, a layered cavity is designed in the sand box mold of the present utility model for heat preservation. There is a space for placing asbestos in the layered cavity, providing heat preservation performance for the sand box mold body 1, reducing the heat dissipation of the molten iron in the box, slowing down the liquid-solid conversion, and thus controlling the solidification sequence of each part in roll casting. At the same time, the sand support ring at the lower end of the sand box mold body 1 is removed, and an iron rod is used to support the molding sand. After casting is completed, the iron rod is pulled out to remove the support for the molding sand, making it easier to separate the sand from the heat preservation riser box 3.
[0022] It should be explained that the cavities before the molten iron enters the heat preservation riser box 3 are all for holding molten iron. Only the heat preservation riser box 3 has special structural requirements, and there are no requirements for the molten iron in the cavities of other parts.
[0023] In one embodiment, for the above heat preservation riser box 3, an installation cavity 8 is formed on the inner wall of the heat preservation riser box 3. Heat preservation cotton 9 is placed inside the installation cavity 8. Vent holes 10 are formed at the outer bottom end of the heat preservation riser box 3. A gap 12 is provided between the heat preservation riser box 3 and the sand box mold body 1, and molding sand 13 is provided inside the gap 12, thereby increasing the time for iron to change from liquid to solid and accelerating the separation time of the molding sand from the inside of the heat preservation riser box 3.
[0024] In one embodiment, for the above flange 4, a box body protection ring 11 is provided on the outer side of the flange 4, thereby increasing the sealing performance of the heat preservation riser box 3 and ensuring the heat preservation effect of the heat preservation riser box 3.
[0025] To facilitate the understanding of the above technical solution of the present utility model, the working principle or operation method of the present utility model in the actual process will be described in detail below.
[0026] In actual application, first, the heat-insulating riser box 3 is fixed to the outside of the sand mold body 1 by using the flange 4 and the box body protective ring 11, and a vent hole 10 is opened at the outer bottom end of the heat-insulating riser box 3. At the same time, a molding sand iron rod is inserted into the vent hole 10. After the fixation is completed, the molten iron enters the sand mold body 1 through the molten iron inlet 2. The molten iron enters the sand mold body 1 after passing through the cold mold, and then the molten iron solidifies into a roll; molding sand is arranged between the gap 12 between the heat-insulating riser box 3 and the sand mold body 1 to reduce the solidification speed of the molten iron.
[0027] In summary, by means of the above technical solution of the present utility model, a layered cavity is designed in the sand mold body 1 of the present utility model for heat preservation. There is a space for placing asbestos in the layered cavity, which provides heat preservation performance for the sand mold body 1, reduces the heat dissipation of the molten iron in the box, slows down the liquid-solid conversion, and thus controls the solidification sequence of each part in the roll casting. At the same time, the supporting sand ring at the lower end of the sand mold body 1 is removed, and an iron rod is used to support the molding sand. After the casting is completed, the iron rod is pulled out to remove the support for the molding sand, making it easier to separate the sand from the heat-insulating riser box 3.
[0028] In the present utility model, unless otherwise clearly defined and limited, terms such as "installation", "setting", "connection", "fixation", "swivel connection" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or integrated; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium. It can be the internal communication of two components or the interaction relationship between two components. Unless otherwise clearly defined, for those of ordinary skill in the art, the specific meanings of the above terms in the present utility model can be understood according to specific situations.
[0029] The above are only the preferred embodiments of the present utility model and are not intended to limit the present utility model. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present utility model shall be included within the protection scope of the present utility model.
Claims
1. A roll casting sand box mold, comprising a sand box mold body (1), a molten iron inlet (2) is arranged on one side of the bottom end of the sand box mold body (1), characterized in that: The outer side of the flask mold body (1) is provided with a heat-insulating riser box (3), and both ends of the heat-insulating riser box (3) are provided with flanges (4) matching with the flask mold body (1); A cavity (5) is provided inside the sand box mold body (1); Box handles (6) are provided at both ends of the thermal insulation riser box (3), and a retaining ring (7) is provided on the side of the box handle (6) away from the thermal insulation riser box (3).
2. A roller casting sand box mold according to claim 1, characterized in that: The inner wall of the heat-insulating riser box (3) is provided with an installation cavity (8), and heat-insulating cotton (9) is placed inside the installation cavity (8).
3. A roller casting sand box mold according to claim 2, characterized in that: The outer bottom end of the heat-insulating riser box (3) is provided with an air hole (10).
4. A roller casting sand box mold according to claim 3, characterized in that: A box protection ring (11) is arranged on the outer side of the flange (4).
5. The roller casting sand box mold according to claim 4, characterized in that: A gap (12) is provided between the heat-insulating riser box (3) and the sand box mold body (1), and molding sand (13) is provided inside the gap (12).