A porous plug former

Abstract

The utility model provides a kind of porous plug rod forming die, including mould body, rubber cap assembly, mould core rod and multiple nylon rods, the top of mould body is provided with accommodating cavity, the accommodating cavity is compatible with rubber cap assembly, the recessed cavity of rubber cap assembly is provided with corresponding plug rod head, the rubber cap assembly is made of first rubber cap and second rubber cap, multiple through holes are provided on the first rubber cap, the centre part of mould body is located at mould core rod, the mould core rod includes stem head and stem body, multiple positioning holes are set to stem head outer surface corresponding through hole, one end of nylon rod is inserted into positioning hole through through hole.The utility model is provided with multiple through holes on first rubber cap, multiple positioning holes are set to stem head outer surface corresponding through hole, and through hole and positioning hole make that the position of hole channel after the volatilization of nylon rod into hole does not deviate.

Description

Technical Field

[0001] This utility model relates to the field of casting equipment technology, specifically to a multi-hole plug rod forming mold. Background Technology

[0002] Stopper rods are key functional refractory materials in continuous steel casting production. They work in conjunction with the tundish nozzle to control the steel flow from the tundish to the setter. Argon gas is blown into the steel flow channel through the stopper rod to prevent blockage due to inclusion deposition, thereby improving steel quality and maintaining normal continuous casting production. Currently, commonly used argon-blowing stopper rods are classified into single-hole and multi-hole types, with varying numbers of vent holes on the rod head.

[0003] Compared to single-hole argon-blowing stoppers, porous argon-blowing stoppers offer a more ideal argon-blowing effect in continuous casting processes for steel smelting. They reduce the occurrence of excessive or insufficient argon flow and generate more microbubbles around the stopper head, preventing clogging of the blowing holes and thus mitigating issues such as weakened impurity removal and insufficient flow control precision. Currently, porous stoppers are machined to the required shape and size, or the stopper head is prepared using a mold and then drilled. However, the production of porous stoppers suffers from difficulties in controlling the ductwork, high drilling difficulty, significant processing waste, and a tendency for the stopper head to crack during drilling. Therefore, the existing technology requires further development. Utility Model Content

[0004] This utility model provides a porous stopper rod forming mold, the specific implementation of which is as follows: A multi-hole stopper rod forming mold includes a mold body, a cap assembly, a core rod, and multiple nylon rods. The top of the mold body is provided with a receiving cavity, which is adapted to the cap assembly. The cap assembly is provided with a recess corresponding to the stopper rod head. The cap assembly consists of a first cap and a second cap. The first cap is provided with multiple through holes. The core rod is located at the center of the mold body. The core rod includes a rod head and a rod body. The outer surface of the rod head is provided with multiple positioning holes corresponding to the through holes. One end of the nylon rod passes through the through hole and is inserted into the positioning hole.

[0005] Furthermore, the first adhesive cap is snapped into the middle of the second adhesive cap.

[0006] Furthermore, the bottom of the first cap has a first concave curved surface, and the second cap has a second concave curved surface, with the first and second concave curved surfaces together forming a cavity.

[0007] Furthermore, the rod head has a conical structure.

[0008] Furthermore, the rod head and the rod body are connected by threads.

[0009] Furthermore, the rod head is placed in the corresponding cavity.

[0010] Furthermore, the porous plug forming mold also includes a cylindrical cap, which is located on top of the first and second rubber caps.

[0011] Furthermore, the diameter of the through hole is set to correspond to the diameter of the nylon rod, and the diameter of the positioning hole is set to correspond to the diameter of the nylon rod.

[0012] Beneficial effects: 1. This utility model does not require drilling technology. The first rubber cap is provided with multiple through holes, and the outer surface of the mold core rod head is provided with multiple positioning holes corresponding to the through holes. The nylon rod passes through the through holes and positioning holes so that the position of the channel obtained after the nylon rod evaporates and forms a hole will not deviate.

[0013] 2. This utility model allows the curvature and position of the air guide holes of the multi-hole plug rod to be adjusted by simply replacing the first rubber cap with different hole distributions and the rod head of the mold core rod. This saves production costs and is applicable to different continuous casting steel pouring scenarios. The nylon rod volatilization and the rod head mold that approximates the final product shape reduce the difficulty and procedures of processing.

[0014] 3. This utility model can indirectly control the direction and distribution area of ​​the blowing channel formed by the volatilization of the nylon rod by controlling its position, forming a diffuse porous argon gas channel. When the stopper is used, the continuous airflow layer in the rod head area inhibits the adhesion of oxides and reduces the deposition of hardened impurities on the immersed inner wall, thereby improving the purity of the molten steel and extending the service life of the stopper. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of the porous plug rod forming mold structure of this utility model; Figure 2 This is a cross-sectional view of the first adhesive cap of this utility model; Figure 3 This is a top view of the first adhesive cap of this utility model; Figure 4 This is a schematic diagram of the structure of the rod head of this utility model.

[0016] The above figures include the following reference numerals: 1. First rubber cap; 11. Through hole; 12. First concave curved surface; 2. Second rubber cap; 21. Second concave curved surface; 3. Receiving cavity; 4. Nylon rod; 5. Rod head; 51. Positioning hole; 6. Rod body; 7. Pressure cap; 8. Mold body. Detailed Implementation

[0017] The specific embodiments of this utility model are described below with reference to the accompanying drawings and examples: It should be noted that the structures, proportions, sizes, etc. shown in the accompanying drawings are only for the purpose of assisting those skilled in the art in understanding and reading the content disclosed in the specification, and are not intended to limit the conditions under which the present invention can be implemented. Any modifications to the structure, changes in the proportions, or adjustments to the size, without affecting the effects and purposes that the present invention can produce, should still fall within the scope of the technical content disclosed in the present invention.

[0018] Meanwhile, the terms such as "upper", "lower", "left", "right", "middle" and "one" used in this specification are only for clarity of description and are not intended to limit the scope of implementation of this utility model. Changes or adjustments to their relative relationships, without substantially altering the technical content, should also be considered as within the scope of implementation of this utility model.

[0019] According to an embodiment of this utility model, a porous plug rod forming mold is provided. Please refer to [link / reference]. Figures 1 to 4 ,like Figure 1 As shown, the device includes: a mold body 8, a cap assembly, a core rod, and multiple nylon rods 4. The top of the mold body 8 has a receiving cavity 3, which is adapted to the cap assembly. The cap assembly has a recess corresponding to the head of the plug rod. The cap assembly consists of a first cap 1 and a second cap 2. The first cap 1 has multiple through holes 11. The core rod is located at the center of the mold body 8 and includes a rod head 5 and a rod body 6. The outer surface of the rod head 5 has multiple positioning holes 51 corresponding to the through holes 11. One end of the nylon rod 4 passes through the through hole 11 and is inserted into the positioning hole 51. This invention eliminates the need for drilling. The first cap 1 has multiple through holes 11, and the outer surface of the core rod head 5 has multiple positioning holes 51 corresponding to the through holes 11. The through holes 11 and positioning holes 51 ensure that the nylon rod 4 does not deviate from its position after evaporation and pore formation.

[0020] The first rubber cap 1 is snapped into the middle of the second rubber cap 2. The first rubber cap 1 is snapped into the middle of the second rubber cap 2, and the two cooperate to form a rubber cap assembly. This utility model allows the curvature and position size of the air guide holes of the multi-hole plug rod to be adjusted by simply replacing the first rubber cap 1 with different hole distributions and the mold core rod head 5, saving production costs and being applicable to different continuous casting steel pouring scenarios.

[0021] like Figure 2 and Figure 3 As shown, the bottom of the first cap 1 has a first concave curved surface 12, and the second cap 2 has a second concave curved surface 21. The first concave curved surface 12 and the second concave curved surface 21 together form a cavity. The cavity is an arc-fitted curve that approximates the shape of a rod head, and the connecting part is smooth without protrusions, so that the prepared stopper rod will have a relatively smooth rod head that approximates the final product after isostatic pressing.

[0022] like Figure 4 As shown, the rod head 5 has a conical structure. The rod head 5 is a conical shape with an arc-shaped tip, and its outer surface has a plurality of evenly distributed positioning holes 51. The positioning holes 51 are connected to the lower end of the nylon rod 4 and fix the nylon rod 4 in place. The positioning holes 51 and the through holes 11 cooperate with each other to control the positional deviation of the channels formed after the nylon rod 4 evaporates within a reasonable range.

[0023] The rod head 5 and the rod body 6 are connected by threads. The rod head 5 and the rod body 6 together constitute the mold core rod. The connection between the rod head 5 and the rod body 6 by threads facilitates the disassembly and installation of the rod head 5 and the rod body 6.

[0024] The rod head 5 is placed in the corresponding cavity. The nylon rod 4 is connected to the positioning hole 51 on the rod head 5 through the cavity.

[0025] The porous plug forming mold also includes a cylindrical cap 7, which is located on top of the first rubber cap 1 and the second rubber cap 2. The cap 7 is cylindrical in shape and serves a sealing function. Together with the cylindrical mold body 8, it forms the outer frame of the plug. In addition, the cap 7 also presses down on the excess part of the nylon rod 4 to stabilize the nylon rod 4.

[0026] The diameter of the through hole 11 corresponds to the diameter of the nylon rod 4, and the diameter of the positioning hole 51 also corresponds to the diameter of the nylon rod 4. The correspondence between the diameters of the through hole 11 and the positioning hole 51 and the diameter of the nylon rod 4 ensures that the nylon rod 4 passes through the hole without wobbling. The nylon rod 4 is flexible and bendable, and it can self-vaporize in the kiln. The pores formed by the volatilization of the nylon rod 4 reduce the need for subsequent processing of the stopper rod head and the tight drilling of multiple argon gas channels, saving production costs, shortening the production cycle, significantly improving production and labor efficiency, and effectively improving the structural stability.

[0027] The wall thickness of the mold body 8 is not less than 20mm; the diameter of the nylon rod 4 is 2 to 3mm; and the length of the rod head 5 is about 100mm.

[0028] The specific usage of this utility model is as follows: When forming a porous stopper rod, the raw material is first added through the mold body 8. Then, when the material reaches the rod head, the nylon rod 4 is inserted into the positioning hole 51 of the mold core rod head 5. Next, the second rubber cap 2 is inserted sequentially, and then the nylon rod 4 is inserted sequentially into the through hole 11 reserved in the first rubber cap 1. When the rod head material fills the second rubber cap 2, the first rubber cap 1 is inserted, the nylon rod 4 is straightened appropriately, and the pressure cap 7 is placed in to compact it, pressing down any excess nylon rod 4. Finally, a sealing clamp is used to secure it firmly, with a sealing thickness of 40-60mm. After isostatic pressing, the rod head is relatively smooth, and multiple regularly distributed nylon rods 4 are embedded in the rod head. After the stopper rod undergoes a firing process, the nylon rods 4 will melt and volatilize at high temperature, leaving multiple diffused channels, resulting in the final porous stopper rod.

[0029] This invention, on the one hand, can control the position of the nylon rod 4 to indirectly control the direction and distribution area of ​​the blowing channel formed by its volatilization, thus forming a diffuse porous argon channel. When the stopper is used, the continuous airflow layer in the rod head area inhibits the adhesion of oxides and reduces the deposition of hardened impurities on the immersed inner wall, thereby improving the purity of the molten steel and extending the service life of the stopper. On the other hand, the integrated molding design of the mold reduces the subsequent processing of the stopper rod head and the tight drilling process of multiple argon channels, saving production costs, shortening the production cycle, significantly improving production and labor efficiency, and effectively improving the stability of its structure.

[0030] Many other changes and modifications can be made without departing from the concept and scope of this utility model. It should be understood that this utility model is not limited to the specific embodiments, and the scope of this utility model is defined by the appended claims.

Claims

1. A porous stopper rod forming mold, characterized in that, The mold includes a mold body, a cap assembly, a core rod, and multiple nylon rods. The top of the mold body has a receiving cavity that is adapted to the cap assembly. The cap assembly has a recess corresponding to the head of the plug rod. The cap assembly consists of a first cap and a second cap. The first cap has multiple through holes. The core rod is located at the center of the mold body and includes a rod head and a rod body. The outer surface of the rod head has multiple positioning holes corresponding to the through holes. One end of the nylon rod passes through the through hole and is inserted into the positioning hole.

2. The porous plug rod forming mold according to claim 1, characterized in that, The first rubber cap is snapped into the middle of the second rubber cap.

3. The porous plug rod forming mold according to claim 2, characterized in that, The bottom of the first cap has a first concave curved surface, and the part of the second cap has a second concave curved surface. The first and second concave curved surfaces together form a cavity.

4. The porous plug rod forming mold according to claim 1, characterized in that, The rod head has a conical structure.

5. A porous plug rod forming mold according to claim 1, characterized in that, The rod head and the rod body are connected by threads.

6. A porous plug rod forming mold according to claim 1, characterized in that, The rod head is placed in the corresponding concave cavity.

7. A porous plug rod forming mold according to claim 1, characterized in that, The porous plug forming mold also includes a cylindrical pressure cap, which is located on top of the first and second rubber caps.

8. A porous plug rod forming mold according to claim 1, characterized in that, The diameter of the through hole is set to correspond to the diameter of the nylon rod, and the diameter of the positioning hole is set to correspond to the diameter of the nylon rod.

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