Groove-shaped pouring cup capable of automatically stopping slag

Abstract

The utility model belongs to the field of pouring cups, and particularly relates to a groove-shaped pouring cup capable of automatically stopping slag, which comprises a steel groove body, a fire-resistant lining and lifting lugs, the two ends outside the steel groove body are respectively provided with one lifting lug, the bottom of the steel groove body is provided with a water outlet, a slag separating plate is arranged in the steel groove body, and the slag separating plate is inserted into an open groove of the fire-resistant lining. The distance h between the bottom edge of the slag partition plate and the bottom of the refractory lining is 30-60mm; one side of the slag partition plate is a steel inlet area, and the other side of the slag partition plate is a steel outlet area; the water outlet is located in the fire-resistant step, the upper edge of the fire-resistant step is flush with the lower edge of the slag partition plate, and the distance between the fire-resistant step and the slag partition plate is 60-80 mm. The utility model has the beneficial effects that a turning runner of molten iron from the slag partition plate to the water outlet is beneficial to floating of iron slag, an automatic slag blocking function can be realized, more than 99% of floating slag is blocked, the slag inclusion defect of iron castings is obviously reduced, and the qualification rate of finished products reaches 100%.

Description

Technical Field

[0001] The utility model belongs to the field of pouring cups, in particular to a trough-shaped pouring cup capable of automatically blocking slag. Background Art

[0002] Casting technology is one of the most important methods for forming mechanical parts. Metal casting involves pouring molten metal into a shaped cavity to create a casting with the desired shape and function. Some castings can be used directly, while others require further machining, heat treatment, and other processes to obtain the desired component.

[0003] In the casting production process, the pouring of molten metal needs to pass through the pouring cup, sprue, and ingrown to enter the mold cavity (see Figure 4 The pouring cup is one of the important units that are indispensable to the pouring system. Generally, the pouring cup is used to collect the molten metal and accurately enter the mold cavity, and prevent the molten metal from splashing before entering the sprue. There are many kinds of pouring cups in daily production, including homemade trumpet-shaped ones and trumpet-shaped ones made of refractory materials by professional factories ( Figure 5 ) and common troughs made by foundries using various types of sand ( Figure 6 ) and so on. These types of pouring cups are widely used in ferrous metal casting.

[0004] Since cast iron has good fluidity after melting, it is not suitable for bottom ladle pouring, and can only be poured by flipping ladle (see diagram). Figure 7 ) , the molten iron slag floating above the molten metal will flow out with the molten metal and enter the mold cavity through the pouring cup, causing defects such as slag inclusion in the casting. To reduce this defect, a groove-type pouring cup is commonly used, but in actual production, it can only reduce the defect by about 60%, which is not a significant effect.

[0005] Chinese utility model patent application number 202222679207.9 discloses a pouring cup with a built-in filter assembly. The pouring cup is a detachable structure, comprising a first cup body and a second cup body. When the first cup body and the second cup body are combined, a through-hole runner with upper and lower openings is formed between them. The filter assembly is installed inside the through-hole runner; the cross-section of the through-hole runner has a polygonal structure. By setting the through-hole runner as a polygonal structure, the pouring cup of this application prevents the molten metal from rotating and flipping in the runner during pouring, thus preventing oxidation of the molten metal and the generation of air entrainment. The purpose is to reduce the inclusion rate of the casting through the filter assembly and improve the molding quality of the casting.

[0006] Chinese utility model patent application number 202223320709.9 discloses a plug removal device and pouring cup, comprising a plug for sealing a pouring hole, a drive mechanism for driving the plug, and a connecting rod connecting the plug and the drive mechanism. The drive mechanism comprises a fixed seat, a guide rod movably connected to the fixed seat, and a lever member for driving the guide rod to move up and down. The fixed seat is provided with a locking portion, and the guide rod is provided with a fastening portion that forms a locking engagement with the locking portion to secure the guide rod. This solution has a simple structure, is easy to adjust, and has high stability, while also meeting the requirements of large-capacity pouring.

[0007] It can be seen from the above-mentioned existing technologies that minimizing the amount of molten iron slag entering castings is an unremitting pursuit in the industry. However, due to various constraints, the results are not satisfactory and further research and development is necessary. Utility Model Content

[0008] The purpose of the utility model is to provide a trough-shaped pouring cup that can automatically block slag, overcome the shortcomings of the existing technology, adopt a trough-shaped pouring cup structure, utilize a plug-in slag partition plate and a refractory step at the water outlet to form a turning flow channel for molten iron, realize the automatic slag blocking function, and at the same time control the speed of the pouring cup during pouring, improve the slag blocking effect, thereby reducing slag inclusion defects in cast iron parts and improving the molding quality of castings.

[0009] To achieve the above objectives, the present invention is implemented through the following technical solutions:

[0010] A trough-shaped pouring cup capable of automatically blocking slag comprises a steel trough body, a refractory lining and a lifting lug, wherein a lifting lug is provided at each end of the outer end of the steel trough body, a refractory lining is provided in the steel trough body, and a water outlet is provided at the bottom of the steel trough body. A slag separator is provided in the steel trough body, which is inserted into the slot of the refractory lining, and the bottom edge of the slag separator is 30-60 mm away from the bottom of the refractory lining; one side of the slag separator is a steel inlet area, and the other side is a steel outlet area, and the water outlet is located at the bottom of the steel outlet area; the water outlet is located on a refractory step, and the upper edge of the refractory step is flush with the lower edge of the slag separator, and a spacing m of 60-80 mm is provided between the refractory step and the slag separator, and from the steel inlet area to the steel outlet area, the molten steel bypasses the bottom of the slag separator and the edge of the refractory step to form an S-shaped flow channel.

[0011] Furthermore, the outer dimensions of the steel trough body are (500-800) mm in length × width × height × (300-500) mm × (300-500) mm, and the length:width = 2:1.

[0012] Furthermore, the thickness of the refractory lining is 60-150 mm.

[0013] Furthermore, the refractory lining is a resin sand lining.

[0014] Furthermore, the length ratio of the steel entry zone to the steel exit zone is 1:1-2.

[0015] Furthermore, the gap between the slag separator and the slot of the refractory lining is filled with casting coating paste.

[0016] Furthermore, the contact areas of the refractory lining and the slag separator with the liquid metal are coated with a zircon powder alcohol-based coating layer, and the coating layer thickness is 1-3 mm.

[0017] Compared with the prior art, the beneficial effects of the present invention are:

[0018] 1) This utility model adopts a trough-shaped pouring cup structure, adopts a plug-in slag separator and a refractory step at the outlet, forming a turning flow channel for molten iron from the slag separator to the outlet, which is conducive to the floating of iron slag and can realize the automatic slag blocking function. More than 99% of the floating slag is blocked, and the slag blocking effect is excellent;

[0019] 2) By stably controlling the pouring speed, the casting can be filled smoothly, significantly reducing the slag inclusion defects of the cast iron parts, and the qualified rate of the finished product reaches 100%. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 This is a vertical cross-sectional view of an embodiment of the utility model;

[0021] Figure 2 It is a cross-sectional view of an embodiment of the utility model;

[0022] Figure 3 This is a schematic diagram of the pouring state of an embodiment of the utility model;

[0023] Figure 4 It is a schematic diagram of the pouring system structure in the prior art;

[0024] Figure 5 It is a schematic diagram of the structure of a common conical pouring cup in the prior art;

[0025] Figure 6 This is a schematic diagram of the structure of a common trough-shaped pouring cup in the prior art;

[0026] Figure 7 It is a schematic diagram of ladle pouring in the prior art.

[0027] In the figure: 1-steel trough, 2-refractory lining, 3-lifting ear, 4-water outlet, 5-slag partition, 6-refractory step, 7-upper box, 8-lower box, 9-pouring cup, 10-sprue, 11-riser, 12-casting, 13-cross gate, 14-ingate, 15-floating slag. DETAILED DESCRIPTION

[0028] The technical solutions of the present invention will be described clearly and completely below in conjunction with specific embodiments. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all of the embodiments.

[0029] In order to more clearly illustrate the specific implementation methods of the utility model or the technical solutions in the prior art, the specific embodiments required for use in the specific implementation methods or the description of the prior art will be briefly introduced below. Obviously, the specific embodiments described below are some implementation methods of the utility model. For ordinary technicians in this field, other specific embodiments can be obtained based on these specific embodiments without paying creative work.

[0030] The components of the embodiments of the present invention generally described and shown in the specific embodiments herein can be arranged and designed in countless different configurations. Therefore, the following detailed description of the embodiments of the present invention provided in the specific embodiments is not intended to limit the scope of the claimed invention, but rather merely represents selected embodiments of the present invention.

[0031] See Figure 1-3 , is a schematic structural diagram of an embodiment of a trough-shaped pouring cup that can automatically block slag in the utility model, comprising a steel trough body 1, a refractory lining 2 and a lifting lug 3. A lifting lug 3 is provided at each end of the outer side of the steel trough body 1. To ensure overall strength and facilitate transportation, the thickness of the steel plate is 1.5-2mm. The lifting lug 3 is convenient for lifting. A refractory lining 2 is provided in the steel trough body 1, a water outlet 4 is provided at the bottom of the steel trough body 1, and a slag partition plate 5 is provided in the steel trough body 1. The slag partition plate 5 is made of refractory aggregate with an Al2O3 content of more than 60% and a binder, so as to improve the reuse rate. The slag partition plate 5 is inserted into the slot of the refractory lining 2. According to the amount of molten iron to be poured, the bottom edge of the slag partition plate 5 is 30-60 mm away from the bottom of the refractory lining 2, and generally 40-50 mm is selected; one side of the slag partition plate 5 is the steel inlet area A, and the other side is the steel outlet area B, and the water outlet 4 is located at the bottom of the steel outlet area B; the water outlet 4 is located on the refractory step 6, and the upper edge of the refractory step 6 is flush with the lower edge of the slag partition plate 5, and a spacing m of 60-80 mm is provided between the refractory step 6 and the slag partition plate 5.

[0032] In this embodiment, the outer dimensions of the steel tank 1 are 800 mm (length) x 400 mm (width) x 350 mm (height), with a length (L) to width (B) ratio of 2:1. The thickness P of the refractory lining 2 is 60-150 mm, with an optimal thickness of 80-120 mm. The thickness a of the slag screen 5 is greater than 50 mm. To improve post-use cleaning and remanufacturing efficiency, the refractory lining 2 is preferably a resin sand lining with good disintegration properties. The length ratio of the steel inlet area A to the steel outlet area B is 1:1-2, preferably 1:2.

[0033] To prevent the slag screen 5 from floating during casting, a casting paste or core adhesive is typically used. The gap between the slag screen 5 and the slots in the refractory lining 2 is preferably filled with casting paste. The areas of the refractory lining 2 and slag screen 5 that come into contact with the liquid metal are coated with a zircon powder alcohol-based coating, preferably 2-3 mm thick, to protect the steel tank 1 and prevent defects such as sand inclusions caused by erosion by the molten metal.

[0034] The utility model discloses a trough-shaped pouring cup capable of automatically blocking slag. During the pouring process, molten steel is quickly poured into a steel inlet area A. The metal liquid level in the steel inlet area A of the pouring cup quickly reaches above an observation line X. The distance between the observation line X and the bottom H1 of the refractory lining 2 is greater than 3h. Then, the pouring speed is reduced to gradually increase the metal liquid in the steel inlet area A. When the distance from the observation line X to the upper edge of the refractory lining 2 is 50-100mm, the pouring speed is maintained. When the riser of the mold is observed to be about to be filled with the metal liquid, the pouring is stopped immediately.

[0035] To obtain the best slag blocking effect, control the rapid pouring, and make the liquid level in the pouring cup reach above 2 / 3H height (without overflowing as the principle) after 5-10 seconds. After the pouring is stable, keep the floating slag 15 below the liquid level H1.

[0036] Although the embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and variations may be made to these embodiments without departing from the principles and spirit of the present invention, and the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A trough-shaped pouring cup capable of automatically blocking slag, comprising a steel trough body, a refractory lining and a lifting lug, wherein a lifting lug is provided at each end of the steel trough body, a refractory lining is provided in the steel trough body, and a water outlet is provided at the bottom of the steel trough body, characterized in that: A slag partition plate is provided in the steel trough body, which is inserted into the slot of the refractory lining, and the bottom edge of the slag partition plate is 30-60 mm away from the bottom of the refractory lining h; one side of the slag partition plate is the steel inlet area, and the other side is the steel outlet area, and the water outlet is located at the bottom of the steel outlet area; the water outlet is located on the refractory step, and the upper edge of the refractory step is flush with the lower edge of the slag partition plate. A spacing m of 60-80 mm is provided between the refractory step and the slag partition plate. From the steel inlet area to the steel outlet area, the molten steel bypasses the bottom of the slag partition plate and the edge of the refractory step to form an S-shaped flow channel.

2. The trough-shaped pouring cup capable of automatically blocking slag according to claim 1, characterized in that: The external dimensions of the steel trough body are (500-800) mm × (300-500) mm × (300-500) mm in length × width × height, and the ratio of length to width is 2:

1.

3. The trough-shaped pouring cup capable of automatically blocking slag according to claim 1, characterized in that: The thickness of the refractory lining is 60-150 mm.

4. The trough-shaped pouring cup capable of automatically blocking slag according to claim 1, characterized in that: The refractory lining is a resin sand lining.

5. The trough-shaped pouring cup capable of automatically blocking slag according to claim 1, characterized in that: The length ratio of the steel entry zone to the steel exit zone is 1:1-2.

6. The trough-shaped pouring cup capable of automatically blocking slag according to claim 1, characterized in that: The gaps between the slag screen and the slots of the refractory lining are filled with casting paint paste.

7. The trough-shaped pouring cup capable of automatically blocking slag according to claim 1, characterized in that: The contact areas of the refractory lining and the slag separator with the liquid metal are coated with a zircon powder alcohol-based coating layer with a thickness of 1-3 mm.

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