Pouring basin capable of automatically stopping slag and preventing turbulent flow and molten metal pouring system comprising pouring basin

Abstract

The utility model relates to a pouring basin capable of automatically stopping slag and preventing turbulent flow and a molten metal pouring system comprising the pouring basin. The pouring basin capable of automatically stopping slag and preventing turbulent flow comprises a first groove, a second groove, a filter screen and a pouring plug, the first groove and the second groove are communicated through the filter screen, a curved slope is arranged in the first groove, a pouring gate connecting opening is formed in the side, away from the first groove, of the second groove, and the pouring gate connecting opening is communicated with the curved slope. The pouring gate plug is movably mounted at the pouring gate connecting opening and is used for blocking or opening the pouring gate connecting opening. Compared with the prior art, the pouring basin capable of automatically stopping slag and preventing turbulence and the molten metal pouring system comprising the pouring basin provided by the utility model have the advantages that multiple designs of the turbulence-preventing pouring plug and the slagging-preventing filter screen are additionally arranged, and the pouring basin is designed into two areas, namely the first groove and the second groove; initial air holes and dregs rushing into the pouring basin are effectively restrained, the internal metallographic structure of a casting is improved, and the mechanical property of the casting is improved.

Description

Technical Field

[0001] This utility model relates to the field of metal casting technology, and more specifically, to a self-closing slag-blocking and turbulent flow prevention pouring basin system and a molten metal pouring system including the pouring basin. Background Technology

[0002] The molten metal gating system in metal casting typically consists of a gating bowl, sprue, runner, and ingate. The main function of the gating system is to keep the molten metal clean and to fill the mold at a minimum rising speed to obtain a clean casting.

[0003] The pouring bowl is generally made of iron and a sand core. Its design is relatively simple. The principle is as follows: under the influence of gravity, the molten metal in the ladle, after degassing and purification, flows directly into the pouring bowl. The design of the pouring bowl reduces the direct impact of the high-temperature molten metal on the mold, ensuring the mold is not damaged and effectively preventing splashing and overflow during pouring. The molten metal in the pouring bowl directly enters the sprue of the casting's gating system, effectively ensuring the sprue and gating system are filled completely, preventing the molten metal from flowing out of the gating system, and thus preventing inclusions and porosity defects inside the casting. Therefore, castings using a pouring bowl have a higher density than castings without one.

[0004] Existing pouring bowls are mostly rectangular in structure, serving to receive and guide molten metal, reducing the impact of the molten metal on the mold, preventing splashing and overflow, and skimming off some slag and impurities, preventing them from entering the sprue and gating system, thus increasing the static pressure of the molten metal. However, existing pouring bowls have the following drawbacks: during the pouring process, the operator needs to control the pouring speed and the position of the molten metal introduction according to different samples to avoid directly rushing into the sprue; during the pouring process, molten metal needs to be continuously poured until the sample is completely poured, and the molten metal at the riser of the sample needs to be observed to determine whether the pouring is complete. During the pouring process, the drop in the pouring bowl easily forms initial slag and porosity. Due to the flow and temperature changes of the molten metal, the existing pouring bowl design is not conducive to the floating of slag and the separation of slag and air bubbles, seriously affecting the internal structure and mechanical properties of the casting. Summary of the Invention

[0005] The technical problem this invention aims to solve is that the existing pouring basin design is not conducive to the floating of slag and the separation of slag from air bubbles during the pouring process, which seriously affects the internal structure and mechanical properties of the casting.

[0006] To solve the above-mentioned technical problems, according to one aspect of the present invention, a self-blocking slag-preventing and turbulent flow pouring basin is provided, comprising a first groove, a second groove, a filter screen, and a pouring plug. The first groove and the second groove are connected through the filter screen. The first groove is provided with a curved slope. The second groove is provided with a gating connection port on the side away from the first groove. The pouring plug is movably installed on the gating connection port to seal or open the gating connection port.

[0007] Preferably, the second groove and the sidewall of the first groove are provided with multiple scale lines, each scale line corresponding to the volume of molten metal contained in the pouring basin, so that it is easy to know how much molten metal to pour for settling, degassing and slag removal before pouring.

[0008] Preferably, the self-blocking slag-preventing and turbulence-preventing pouring basin further includes a filter screen mounting groove, which is disposed between the first groove and the second groove, and the filter screen is fixedly installed in the filter screen mounting groove. Depending on the actual situation, the filter screen can be detachably installed in the filter screen mounting groove for easy cleaning and fixation.

[0009] Preferably, the filter screen is made of ceramic material.

[0010] Preferably, the gate plug and the runner connection port are fitted with a clearance.

[0011] Preferably, the number of the gate plugs is multiple.

[0012] The shapes of the sprue basin, the first groove, and the second groove can be selected according to actual needs. Since most sprue basins are rectangular, in order to ensure that the first groove and the second groove have the maximum volume to accommodate the molten metal, preferably, the sprue basin is rectangular, and the first groove is rectangular. Preferably, the second groove is rectangular.

[0013] Preferably, the pouring basin is provided with lifting holes on both sides.

[0014] According to another aspect of the present invention, a molten metal casting system is provided, comprising any of the above-described pouring basins.

[0015] Compared with the prior art, the technical solution provided by the embodiments of this utility model can achieve at least the following beneficial effects:

[0016] First, the self-blocking slag-preventing pouring basin is designed with multiple features, including an anti-turbulence pouring plug and an anti-slag filter screen. The pouring basin is also designed with two areas, a first groove and a second groove, which effectively suppresses the initial porosity and slag that rush into the pouring basin, improves the internal metallographic structure of the casting, and enhances the mechanical properties of the casting.

[0017] Secondly, the gating bowl system structure fully considers the requirements of gating bowls for different weights and pouring temperatures, and has wide applicability. For example, it is suitable for gravity casting of medium and large metal castings with different structures, and can be promoted and applied in the process of large and complex metal castings; it is also suitable for sand casting methods of different weights.

[0018] Third, the filter screen can be detachably installed in the filter screen mounting slot for easy cleaning and fixation.

[0019] Fourth, the second groove or the side wall of the first groove is provided with multiple scale lines, each scale line corresponding to the volume of molten metal contained in the pouring basin, so that it is easy to know how much molten metal to pour for settling, degassing and slag removal before pouring.

[0020] Fifth, it can significantly improve the ease of operation and safety during the pouring process, and effectively prevent turbulence and slag formation of molten metal, thereby improving the internal quality of the castings.

[0021] Sixth, the structure is precisely designed, the filling function is comprehensive, and the process parameters are controllable.

[0022] Seventh, the pouring plug can effectively control the pouring temperature of molten metal.

[0023] Eighth, the curved slope of the first groove and the gate plug of the second groove can effectively prevent secondary oxidation of the molten metal.

[0024] Ninth, it can effectively adjust the rate at which the pouring ladle enters the pouring basin. Attached Figure Description

[0025] To more clearly illustrate the technical solutions of the embodiments of this utility model, the accompanying drawings of the embodiments will be briefly introduced below. Obviously, the drawings described below only involve some embodiments of this utility model, and are not intended to limit this utility model.

[0026] Figure 1 This is a top view of the structure of a self-closing slag-blocking and turbulent flow-preventing pouring basin provided in Example 1;

[0027] Figure 2 for Figure 1 A sectional view along line AA. Detailed Implementation

[0028] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of this utility model. Based on the described embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this utility model.

[0029] Unless otherwise defined, the technical or scientific terms used herein shall have the ordinary meaning as understood by one of ordinary skill in the art to which this invention pertains. The terms “first,” “second,” and similar terms used in this patent application specification and claims do not indicate any order, quantity, or importance, but are merely used to distinguish different components. Similarly, the terms “an” or “a” and similar terms do not indicate a limitation of quantity, but rather indicate the presence of at least one.

[0030] Example 1

[0031] refer to Figure 1 and Figure 2 This embodiment provides a self-blocking slag-preventing and turbulent flow pouring basin, including a first groove 11, a second groove 12, a filter screen 13, and a pouring plug 14. The first groove 12 and the second groove 12 are connected through the filter screen 13. The first groove 11 is provided with a curved slope 16. The second groove 12 is provided with a gating connection port 17 on the side away from the first groove 11. The pouring plug 14 is movably installed on the gating connection port 17 to block or open the gating connection port 17.

[0032] Preferably, the pouring basin is rectangular, and both the first groove 11 and the second groove 12 are rectangular, ensuring that the first groove 11 and the second groove 12 have the maximum volume to accommodate the molten metal. The shapes of the pouring basin, the first groove 11, and the second groove 12 can be selected according to actual needs.

[0033] The first groove 11 and the second groove 12 are connected to adjacent sidewalls. Preferably, a filter screen mounting groove is provided at the connection point, and the filter screen 13 is fixedly installed in the filter screen mounting groove. Preferably, the filter screen 13 is made of ceramic material. The filter screen 13 is detachably installed in the filter screen mounting groove for easy cleaning or fixing. There are two filter screens 13 and two filter screen mounting grooves.

[0034] The first groove 11 and the second groove 12 have multiple scale lines 15 on their sidewalls, each scale line 15 corresponding to the volume of molten metal contained in the pouring basin. Preferably, the scale lines 15 are distributed in the first groove 11, the second groove 12, and the sidewalls where the first groove 11 and the second groove 12 communicate, forming a closed loop. Preferably, adjacent scale lines 15 form a step, for example... Figure 2 There are two steps and two scale lines 15, which are distributed from top to bottom. The data of the upper scale line 15 is greater than that of the lower scale line 15. The number and structure of the scale lines 15 can be set according to actual production needs.

[0035] The first groove 11 is the area where the molten metal enters, and the curved ramp 16 is a downwardly sloping guide surface, preferably from... Figure 1 The top slopes downwards and is located at Figure 1 In the upper part of the groove 11, the upper edge of the curved slope 16 connects to the lowest scale line 15, and the bottom edge of the curved slope 16 connects to the connecting part. Preferably, the curved slope 16 is 30° to 40° and is consistent with the inflow direction of the molten metal.

[0036] There are two gating connection ports 17, each in the shape of a hollow cuboid, preferably a hollow cuboid, with the diameter of the end in contact with the gating being smaller than the diameter of the end furthest from the gating. Each gating connection port 17 has a gating plug mounting groove at the end furthest from the gating. The gating plug 14 is fixed in the gating plug mounting groove with a clearance fit, facilitating easy removal of the gating plug 14 after the molten metal has filled the groove. The gating plug mounting groove has a rectangular structure, with the lower end of the gating plug contacting the gating connection port 17 and the upper end connected to a T-shaped pin by a threaded connection. The dimensions of the gating connection port 17 are calculated based on the minimum flow obstruction section of the casting.

[0037] The pouring basin is provided with lifting holes on both sides.

[0038] This embodiment also provides a molten metal pouring system, including the self-closing slag-blocking and turbulence-preventing pouring basin, which includes the following steps when pouring metal castings:

[0039] (1) Degassing and purification: The molten metal poured into the pouring basin needs to be degassed and purified using a molten metal rotary purification system. Open the argon or nitrogen control valve and exhaust the molten metal through the graphite head hole of the rotary purification system. After the degassing time reaches 18 minutes, close the molten metal rotary purification system, skim off the scum on the surface of the liquid, and let the molten metal stand for 8 to 10 minutes.

[0040] (2) Pour into the sprue basin: Pour the purified molten metal into the first groove 11 at a constant speed along the curved slope 16. The molten metal flows through the filter screen to the second groove 12. When the molten metal reaches the required scale line 15, stop pouring. Then let the molten metal stand. After standing, take out the sprue plug 14. The molten metal enters the sprue from the sprue connection port 17 to complete the automatic filling.

[0041] The metal is any one of ferrous metals, copper metals, aluminum, magnesium, zinc and other non-ferrous metals, as well as any one of alloys, heat-resistant alloys and other similar materials.

[0042] Compared with the prior art, the self-closing slag-blocking and turbulence-preventing pouring basin and the molten metal pouring system including the pouring basin provided in this embodiment combine the advantages of existing pouring basins, and the improvements made on this basis have the following beneficial effects:

[0043] First, the pouring basin is divided into a first groove 11 and a second groove 12. The first groove 11 is the molten metal inlet area, and the second groove 12 is the molten metal waiting area. The added filter screen 13 effectively prevents initial porosity and slag from entering the second groove 12. After the molten metal reaches the required scale line 15, the slag from the molten metal filtered by the filter screen 13 floats on the surface of the molten metal. The air entrapment formed when the molten metal flows into the first groove 11 is significantly reduced after settling in the second groove 12. The added pouring plug 14 smoothly transitions the molten metal flowing into the second groove 12, greatly reducing turbulence and effectively suppressing initial porosity and slag entering the pouring basin. This improves the internal metallographic structure of the casting and enhances its mechanical properties. Compared with existing pouring basins, the slag-blocking efficiency is increased to over 90%.

[0044] Second, it significantly improves the ease of operation and safety during the pouring process.

[0045] Third, it is suitable for gravity casting of medium and large-sized metal castings with different structures, and can be promoted and applied in the process of large and complex metal castings.

[0046] Example 2

[0047] The self-blocking slag-preventing turbulence pouring basin and the molten metal pouring system including the pouring basin provided in this embodiment are basically the same as those provided in Embodiment 1. The difference from Embodiment 1 is that: the number of filter screen 13 and filter screen installation groove is one; the scale line 15 is only set on the side wall of the first groove; the draft angle of the outer contour of the self-blocking slag-preventing turbulence pouring basin is -3°, the draft angle of the inner contour is 3°, the sand intake of the pouring basin is 130mm to 200mm; the degassing head in the degassing and purification step in step (1) has a constant rotation speed of 650r / min and a gas flow rate of 15 to 18L / min.

[0048] Compared with the prior art, the self-closing slag-blocking and turbulence-preventing pouring basin and the molten metal pouring system including the pouring basin provided in this embodiment not only have the beneficial effects of Embodiment 1, but also have the following beneficial effects: it is applicable to sand mold gravity casting methods of different weights and has good versatility; the pouring plug can effectively control the pouring temperature of the molten metal; the curved slope 16 in the inlet area and the pouring plug 14 in the waiting area can effectively prevent the secondary oxidation of the molten metal.

[0049] Example 3

[0050] The self-closing slag-blocking and turbulent flow prevention pouring basin and the molten metal pouring system including the pouring basin provided in this embodiment are basically the same as those provided in Embodiment 2. The difference from Embodiment 2 is that: the number of the gating connection port 17 and the pouring plug 14 is one; the lifting holes on both sides of the pouring basin are φ50; and the time for the settling step in step (2) is 5 minutes.

[0051] Compared with the prior art, the self-closing slag-blocking and turbulence-preventing pouring basin and the molten metal pouring system including the pouring basin provided in this embodiment not only have the beneficial effects of Embodiment 2, but also have the following beneficial effects: the unique structure can effectively adjust the rate at which the ladle pours into the pouring basin; the structural design is more precise, the filling function is more comprehensive, and the process parameters are more controllable. The pouring basin system structure fully considers the needs of pouring basins with different weights and different pouring temperatures, and has wide applicability.

[0052] The above description is merely an exemplary embodiment of the present utility model and is not intended to limit the scope of protection of the present utility model. The scope of protection of the present utility model is determined by the appended claims.

Claims

1. A self-blocking slag-preventing and turbulent flow pouring basin, characterized in that, It includes a first groove, a second groove, a filter screen, and a sprue plug. The first groove and the second groove are connected through the filter screen. The first groove has a curved slope. The second groove has a sprue connection port on the side away from the first groove. The sprue plug is movably installed on the sprue connection port to block or open the sprue connection port.

2. The pouring basin according to claim 1, characterized in that, The second groove and the sidewalls of the first groove are provided with multiple scale lines.

3. The pouring basin according to claim 1, characterized in that, It also includes a filter screen mounting groove, which is disposed between the first groove and the second groove, and the filter screen is fixedly installed in the filter screen mounting groove.

4. The pouring basin according to claim 1, characterized in that, The filter screen is made of ceramic material.

5. The pouring basin according to claim 1, characterized in that, The gate plug is fitted with the runner connection port with a clearance.

6. The pouring basin according to claim 1, characterized in that, The number of gate plugs is multiple.

7. The pouring basin according to claim 1, characterized in that, The pouring basin is rectangular, and the first groove is rectangular.

8. The pouring basin according to claim 7, characterized in that, The second groove is rectangular.

9. The pouring basin according to claim 1, characterized in that, The pouring basin is provided with lifting holes on both sides.

10. A molten metal casting system, characterized in that, Includes the pouring basin as described in any one of claims 1 to 9.

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