Column pouring system

Abstract

The utility model discloses an upright post pouring system which is arranged on the peripheral surface of a casting mould, the discharge end of the pouring system is communicated with the casting mould, the pouring system comprises a straight pouring gate, a transverse pouring gate and an inner pouring gate, the bottom of the straight pouring gate is connected with the transverse pouring gate, a plurality of slotted holes are formed in the transverse pouring gate at intervals along the extending direction of a pipeline of the transverse pouring gate, and the inner pouring gate is communicated with the inner pouring gate. And each slotted hole is correspondingly communicated and connected with one ingate, and a filter screen is also arranged in each slotted hole. According to the stand column pouring system provided by the utility model, the position of the filter screen is changed from an original whole filter screen arranged at the lap joint of the pouring cavity connected with the bottom of the straight pouring gate and the cross pouring gate to a filter screen arranged at the inlet of each inner pouring gate, so that the flow blocking and rectifying effects on the cross pouring gate are reduced, and the flow blocking and rectifying effects on the cross pouring gate are improved. And the pouring time is shortened, molten metal can quickly enter the tail end position of the guide rail, inclusions generated due to low temperature in the early stage are effectively dispersed by subsequent new molten metal, the generation probability of air holes is reduced, and the casting quality is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of casting, in particular to a column pouring system. Background Art

[0002] Horizontal series columns, weight 5 tons, material HT300, the column is a traditional column, with two guide rails on both sides of the bottom of the casting. The guide rails are hard rails with a hardness requirement of HB190-220. The guide rails are not allowed to have any casting defects. In order to ensure the quality of the guide rails, the casting is placed in the lower mold as a whole during the casting process, with the guide rails facing downward.

[0003] When pouring large columns, the molten metal is generally injected from the straight runner into the cross runner under the action of the pressure device and then enters from both ends of the column along the length direction. In order to ensure smooth filling, reduce the air entrainment and turbulence of the molten metal in the mold, reduce the impact on the mold, and facilitate exhaust and slag removal, most of them adopt the bottom pouring method, that is, the bottom of the cross runner is connected to several inner gates that inject molten iron into the bottom of the mold. In the metal casting process, it is often encountered that surface oxides are mixed into the mold when the molten metal is poured, resulting in bubbles on the surface of the casting, making it difficult to ensure the quality of the casting. In order to prevent this from happening, a casting filter is generally used to filter out oxides and other debris in the molten metal, so that the molten metal poured into the mold is purer.

[0004] At present, the commonly used column pouring system is connected to a pouring chamber 30 at the bottom of the sprue 11, Figure 5 The top of the pouring chamber 30 overlaps with the runner 12, and a layer of casting filter 40 is installed at the overlap of the pouring chamber 30 and the runner 12. The molten metal enters the pouring chamber 30 from the sprue 11, and under the action of the external pressure device, the molten metal is filtered through the casting filter 40 and enters the runner 12, and then injected into the mold through the ingrowth 13. This method has a strong flow resistance and rectification effect on the runner 12, and has a greater impact on the actual pressure at the entrance of the ingrowth 12, resulting in a longer pouring time, so that the molten metal reaching the end of the guide rail 21 of the mold 20 is insufficient in pressure and too low in temperature, and pores are easily generated at the end of the guide rail of the casting, affecting the quality of the casting.

[0005] Moreover, the runner 12 does not extend from the front end of the mold 20 to the end of the mold 20 along the length direction of the mold 20, which results in the ingrate 13 not covering the entire mold 20 (refer to Figure 6 ), during the casting process, the temperature of the end of the guide rail part reaching the casting is low, and the incoming molten metal is not easily dispersed or floated by the subsequent molten metal, resulting in a long pouring time and a low temperature of the subsequent molten metal. Subcutaneous pores are concentrated at the end of the guide rail not covered by the inner runner in the casting, which will also affect the quality of the casting. Utility Model Content

[0006] The utility model provides a column pouring system, aiming to solve the problems that the casting filter screen in the existing column pouring system has a strong flow blocking and rectifying effect on the cross runner, has a great influence on the actual pressure at the entrance of the inner runner, and affects the quality of the casting.

[0007] In order to solve the above technical problems, the utility model adopts the following technical solutions:

[0008] A column pouring system is arranged on the outer peripheral surface of the casting mold. The discharge end of the pouring system is connected to the casting mold. The pouring system includes a straight runner, a cross runner and an ingode. The bottom of the straight runner is connected to the cross runner. The cross runner is provided with a plurality of slots at intervals along the extension direction of its pipeline. Each slot is connected to an ingode correspondingly, and a filter is also installed in each slot.

[0009] Furthermore, the above-mentioned cross runner is U-shaped and distributed on the outside of the casting, and the cross runner includes two first cross runners distributed in parallel on both sides of the casting and a second cross runner connecting the two first cross runners. The first cross runner and the second cross runner extend from the front end face of the casting to the rear end face of the casting along the length direction of the casting, and the straight runner is vertically connected to the top center of the second cross runner.

[0010] Furthermore, a containing chamber is provided at the connection between the slot and the ingrown. The containing chamber is a conical hollow structure that is small at the top and large at the bottom. The bottom of the containing chamber is communicated with the top of the ingrown.

[0011] Furthermore, the above-mentioned inner runner extends vertically downward from the top of the casting mold to the bottom of the casting mold, and is connected to the guide rail part of the bottom of the casting mold after bending inward.

[0012] Furthermore, the filter mesh is a ceramic filter mesh.

[0013] Furthermore, the sprue is a ceramic tube of φ80 mm.

[0014] From the above description of the structure of the utility model, it can be seen that the utility model has the following advantages:

[0015] 1. The utility model provides a column pouring system, in which the position of the filter screen is changed from a whole filter screen originally provided at the overlap of the pouring chamber connected to the bottom of the sprue and the cross runner to a filter screen provided at the entrance of each inner runner, thereby reducing the flow resistance and rectification effect on the cross runner, shortening the pouring time, allowing the molten metal to quickly enter the end position of the guide rail, and the inclusions generated by the low temperature in the early stage are effectively dispersed by the subsequent new molten metal, reducing the probability of pores, and improving the quality of castings.

[0016] 2. A accommodating bin is provided at the connection between the slot hole and the ingrowing channel, through which the ingrowing channel is connected to the slot hole. The ingrowing channel extends vertically downward from the top of the mold to the bottom of the mold, and is connected to the guide rail portion at the bottom of the mold after bending inward. The accommodating bin maintains the normal flow and pressure balance of the molten metal during the pouring process, so that the molten metal entering the ingrowing channel can flow smoothly, which is beneficial to improving the surface finish and quality of the casting.

[0017] 3. The first runner and the second runner extend from the front end face of the mold to the rear end face of the mold along the length direction of the mold, so that the endogate can effectively cover the entire mold, reduce the probability of subcutaneous pores in the casting during the casting process, and improve the quality of the casting. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a schematic diagram of the overall structure of the utility model.

[0019] Figure 2 It is the front view of the utility model.

[0020] Figure 3 It is a side view of the utility model.

[0021] Figure 4 It is a top view of the utility model.

[0022] Figure 5 It is a structural schematic diagram of the existing column casting system.

[0023] Figure 6 This is a side view of the existing column casting system.

[0024] In the figure: 10-casting system; 11-sprue; 12-cross runner; 121-first cross runner; 122-second cross runner; 13-inner runner; 14-filter; 15-accommodation bin; 20-mold; 21-guide rail; 30-casting chamber; 40-casting filter. DETAILED DESCRIPTION

[0025] The specific implementation of the present invention is described below with reference to the accompanying drawings. In order to fully understand the present invention, many details are described below, but for those skilled in the art, the present invention can be implemented without these details. For well-known components, methods and processes, they are not described in detail below.

[0026] A column casting system, referring to Figures 1 to 4 The pouring system is arranged on the outer peripheral surface of the casting mold 20, and the discharge end of the pouring system 10 is connected to the casting mold 20. The pouring system 10 includes a sprue 11, a runner 12 and a plurality of ingates 13. The casting mold 20 is an existing structure and will not be described in detail here.

[0027] Reference Figures 1 to 4 The bottom of the sprue 11 is connected to a runner 12, which is U-shaped and distributed outside the mold 20. The runner 12 includes two first runners 121 distributed in parallel on both sides of the mold 20 and a second runner 122 connecting the two first runners 121. The first runner 121 and the second runner 122 extend from the front end face of the mold 20 to the rear end face of the mold 20 along the length direction of the mold 20. The sprue 11 is vertically connected to the top center of the second runner 122. The sprue 11 is preferably a φ80mm ceramic tube. After the molten metal is input through the sprue 11, it is divided into two paths and enters the two first runners 121 respectively, which can distribute the molten metal and ensure that it flows smoothly to every corner of the casting, thereby ensuring the uniformity of the casting.

[0028] Reference Figure 1 The runner 12 is provided with a plurality of slots at intervals along the extending direction of the pipeline. In this embodiment, nine slots are provided at intervals on the two first runners 121. Each slot is connected to an inner runner 13. A filter 14 is also installed in each slot. The filter 14 is preferably a ceramic filter with a specification of 100mm×100mm×22mm. The ceramic filter has high strength, is not easy to deform, has good fire resistance, and has good filtering performance. During pouring, it can better separate molten iron and inclusions to ensure the quality of the casting.

[0029] Reference Figure 2 and Figure 3 The ingrate 13 extends vertically downward from the top of the mold 20 to the bottom of the mold 20, and is connected to the two guide rails at the bottom of the mold 20 after bending inward. The molten metal enters the mold 20 through the ingrate 13, and the liquid level of the molten metal rises steadily to fill the mold, which can well discharge the air on the molten metal surface, which is beneficial to the exhaust scum of the casting. The ingrate 13 can effectively cover the entire guide rail part of the mold 20, which helps to eliminate the subcutaneous pores at the end of the casting guide rail;

[0030] Reference Figure 2 A containing chamber 15 is also provided at the connection between the slot hole and the ingrowing channel 13. The containing chamber 15 is a conical hollow structure with a small top and a large bottom. During the pouring process, the normal flow and pressure balance of the molten metal are maintained, and a stable negative pressure state is maintained, so that the molten metal entering the ingrowing channel 13 can flow smoothly, which is beneficial to improving the surface finish and quality of the casting; the bottom of the containing chamber 15 is connected to the top of the ingrowing channel 13, and the molten metal is filtered by the filter screen 14 and enters the containing chamber 15 and accumulates in the containing chamber 15, and then flows into the ingrowing channel 13.

[0031] The above is only a specific implementation method of the utility model, but the design concept of the utility model is not limited to this. Any non-substantial changes to the utility model using this concept shall be deemed as an infringement of the protection scope of the utility model.

Claims

1. A column pouring system, arranged on the outer peripheral surface of a casting mold, wherein the discharge end of the pouring system is connected to the casting mold, and the pouring system comprises a sprue, a runner and an inner runner, characterized in that: The bottom of the straight runner is connected to the cross runner, and the cross runner is provided with a plurality of slots spaced apart along the extending direction of the pipeline, each of the slots is correspondingly connected to an inner runner, and a filter is also installed in each of the slots.

2. The column pouring system according to claim 1, characterized in that: The cross runner is U-shaped and distributed on the outside of the mold. The cross runner includes two first cross runners distributed in parallel on both sides of the mold and a second cross runner connecting the two first cross runners. The first cross runner and the second cross runner extend from the front end face of the mold to the rear end face of the mold along the length direction of the mold. The straight runner is vertically connected to the top center of the second cross runner.

3. The column pouring system according to claim 1, characterized in that: A accommodating bin is also provided at the connection between the slot hole and the ingrowing channel. The accommodating bin is a conical hollow structure that is small at the top and large at the bottom. The bottom of the accommodating bin is in communication with the top of the ingrowing channel.

4. The column pouring system according to claim 1, characterized in that: The inner runner extends vertically downward from the top of the mold to the bottom of the mold, and is connected to the guide rail part of the bottom of the mold after being bent inward.

5. The column pouring system according to claim 1, characterized in that: The filter screen is a ceramic filter screen.

6. The column pouring system according to claim 1, characterized in that: The sprue is a ceramic tube with a diameter of 80 mm.

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