Gate sprue box suitable for furan resin sand molding

Abstract

The utility model provides a gate sprue box suitable for furan resin sand molding, which relates to the technical field of gate sprue boxes and comprises an upper sprue box and a lower sprue box, the lower sprue box is positioned at the top of the upper sprue box, and a through filter screen is arranged at the top of the lower sprue box. A first filter screen base for fixing the filter screen is arranged below the filter screen; before use, the inner surface of the gate sprue box is completely coated with high-temperature-resistant special alcohol-based paint, after the paint is coated, the paint is ignited, dried and sintered by utilizing the flammability of the paint for pouring, and then the center of a ceramic pipe of the lower sprue box is visually aligned with the center of a direct sprue of a casting mold. And then the edge of the lower sprue box is coated with special box sealing glue, then the upper sprue box is combined, the upper sprue box presses the filter screen, the filter screen is effectively fixed, operation is convenient and fast, potential safety hazards cannot be caused to operators, and follow-up pouring work is facilitated.

Description

Technical Field

[0001] This utility model relates to the field of gate gating box technology, and in particular to a gate gating box suitable for furan resin sand molding. Background Technology

[0002] The direct function of the gating box is to receive molten iron from the ladle and introduce it into the sprue, preventing molten iron from splashing and spilling during pouring. Gating boxes are commonly used to keep the molten iron full during pouring, and they also have a certain function of slag blocking.

[0003] For example, Chinese application number CN201721218408.1 discloses a gate pouring cup suitable for furan resin sand molding. The description states that "this utility model discloses a gate pouring cup suitable for furan resin sand molding, including a pouring body and a gate plate. The pouring body has a cavity for containing molten iron. The opening of the pouring body is equipped with a gate plate, which divides the cavity into two parts. A gap exists between the gate plate and the bottom inner surface of the pouring body. The bottom of the pouring body has a step, dividing the cavity into a high surface and a low surface. A through filter is provided on the high surface. The pouring cup incorporates a special slag-blocking structure and a flow-rectifying system, which greatly improves the quality of the castings. The new gate pouring cup is boxless, lightweight, and can be easily handled by a single person, resulting in high production efficiency. It also promotes the purity of the molten iron used for filling, which is beneficial to improving the quality of the castings."

[0004] In the existing technology, the new gate pouring cup is boxless, lightweight, and can be easily handled by a single person, which has the advantage of high production efficiency. However, when effectively fixing the filter screen, a small amount of special fire-resistant adhesive needs to be applied to both sides of the filter screen, and then it needs to be heated appropriately with a gas torch. This makes it inconvenient to fix the filter screen, poses certain safety risks during operation, and the gas torch will produce smoke or harmful gases during use, which will affect the environment and the health of workers. Utility Model Content

[0005] This utility model mainly provides a gate gating box suitable for furan resin sand molding that facilitates the fixing of filter screens and poses no safety risks.

[0006] To achieve the above objectives, the present invention adopts the following technical solution: a gate gating box suitable for furan resin sand molding, comprising an upper gating box and a lower gating box, wherein the lower gating box is located at the top of the upper gating box, a through filter screen is provided at the top of the lower gating box, a first filter screen base for fixing the filter screen is provided below the filter screen, and a second filter screen base for fixing the filter screen is provided at the bottom of the upper gating box.

[0007] Preferably, the upper gating box is provided with a molten iron cavity to contain molten iron. The opening of the upper gating box is provided with a gate. By injecting molten iron from the side without a sprue, the liquid surface of the upper gating box is kept basically full without overflowing. Since the density of slag is much smaller than that of molten iron, the slag in the molten iron always floats on the liquid surface of the molten iron injection side of the upper gating box. The relatively clean molten iron is turned over through the gap at the bottom of the gate and passes through the filter screen, and then enters the casting cavity from the sprues of the upper and lower gating boxes.

[0008] Preferably, the gate plate divides the molten iron mold cavity into two parts, and a gap is provided between the gate plate and the bottom inner surface of the upper pouring box. The molten iron is turned over and enters the molten iron mold cavity through the gap at the bottom of the gate plate, so the dynamic pressure head of the molten iron is relatively stable and less affected by the height of the ladle outlet. This is conducive to maintaining a stable pouring speed, and the consistency of the molten iron filling speed and flow state is better, which is beneficial to the stability of the casting quality.

[0009] Preferably, the bottom of the upper pouring box is provided with a step, which divides the molten iron cavity into a high surface and a low surface. The step acts as a baffle, which, in conjunction with the downward gate, facilitates the up-and-down fluctuation of the molten iron flow and helps to block some of the slag in the molten iron.

[0010] Preferably, both the upper and lower gating boxes are made of furan resin sand material, and the filter screen is made of foam ceramic material. The furan resin sand material used in the gating box is suitable for casting iron parts with a weight of less than 400 kg. The filter screen made of foam ceramic material plays the role of filtering waste residue.

[0011] Preferably, the higher surface of the cavity is 30mm higher than the lower surface of the cavity, the opening width of the upper gate box is 380-400mm, and the thickness of the gate plate is 30-50mm.

[0012] Compared with the prior art, the advantages and positive effects of this utility model are as follows:

[0013] 1. In this utility model, the gate gating box is designed as a tray shape, divided into an upper gating box and a lower gating box. It is lightweight and small, and can be easily handled by a single person during production. The bottom of the sprue of the upper gating box and the upper part of the sprue of the lower gating box are respectively equipped with a first filter screen base and a second filter screen base. The sprue section of the upper and lower gating boxes uses... Before use, the inner surface of the high-temperature resistant and erosion-resistant ceramic tube is coated with a special high-temperature resistant alcohol-based coating. After coating, the coating is ignited and dried using the flammability of the coating. The coating is ready for casting after sintering. Then, the center of the ceramic tube in the lower gating box is visually aligned with the center of the sprue in the mold. Next, a special sealing adhesive is applied to the edge of the lower gating box. Then, the upper gating box is closed, and the upper gating box presses down on the filter screen. The filter screen is effectively fixed, making the operation convenient and posing no safety hazards to the operator, and facilitating subsequent casting work.

[0014] 2. In this invention, molten iron is injected from the side without a sprue, keeping the upper gating box almost full without overflowing. Since the density of slag is much smaller than that of molten iron, the slag in the molten iron always floats on the surface of the molten iron injection side of the upper gating box. The relatively clean molten iron is turned over through the gap at the bottom of the gate and passes through the filter screen, and then enters the casting cavity from the sprues of the upper and lower gating boxes. Because the molten iron turns over through the gap at the bottom of the gate and enters the molten iron cavity, the dynamic pressure head of the molten iron is relatively stable and less affected by the height of the ladle outlet, which is conducive to maintaining a stable pouring speed. The consistency of the molten iron filling speed and flow state is better, which is conducive to the stability of the casting quality. Attached Figure Description

[0015] Figure 1 A three-dimensional view of the main structure of a gate gating box suitable for furan resin sand molding is provided for this utility model.

[0016] Figure 2 This utility model provides a three-dimensional structural view of the lower gating box in a gate gating box suitable for furan resin sand molding;

[0017] Figure 3 This utility model provides a three-dimensional structural view of the second filter screen base in a gate gating box suitable for furan resin sand molding;

[0018] Figure 4 This utility model provides a three-dimensional cross-sectional view of a gate gating box suitable for furan resin sand molding.

[0019] Legend: 1. Upper gating box; 2. Lower gating box; 3. Filter screen; 4. First filter screen base; 5. Second filter screen base; 6. Molten iron cavity; 7. Gate; 8. High surface inside the cavity; 9. Low surface inside the cavity. Detailed Implementation

[0020] To better understand the above-mentioned objectives, features, and advantages of this utility model, the present utility model will be further described below with reference to the accompanying drawings and embodiments. It should be noted that, unless otherwise specified, the embodiments and features described in these embodiments can be combined with each other.

[0021] Many specific details are set forth in the following description in order to provide a full understanding of the present invention. However, the present invention may also be implemented in other ways different from those described herein. Therefore, the present invention is not limited to the specific embodiments disclosed in the following specification.

[0022] Example 1: As Figures 1-4 As shown, this utility model provides a gate gating box suitable for furan resin sand molding, including an upper gating box 1 and a lower gating box 2. The lower gating box 2 is located on top of the upper gating box 1. A through filter screen 3 is provided on the top of the lower gating box 2. A first filter screen base 4 for fixing the filter screen 3 is provided below the filter screen 3. A second filter screen base 5 for fixing the filter screen 3 is provided at the bottom of the upper gating box 1.

[0023] The overall effect of Embodiment 1 is that, by shaping the gate gating box into a tray shape, it is divided into an upper gating box 1 and a lower gating box 2. A first filter base 4 and a second filter base 5 are respectively installed at the bottom of the direct gating inlet of the upper gating box 1 and the upper part of the direct gating inlet of the lower gating box 2. The direct gating sections of the upper gating box 1 and the lower gating box 2 are... Before use, the inner surface of the gate gating box is coated with a special high-temperature resistant alcohol-based coating. After coating, the coating is ignited and dried using the flammability of the coating. The coating is ready for casting after sintering. Then, the center of the ceramic tube in the lower gating box 2 is visually aligned with the center of the sprue of the mold. Next, a special sealing adhesive is applied to the edge of the lower gating box 2. Then, the upper gating box 1 is closed, and the upper gating box 1 presses down on the filter screen 3. The filter screen 3 is effectively fixed, which is convenient to operate and will not cause safety hazards to the operator, and facilitates subsequent casting work.

[0024] Example 2: Figures 1-4 As shown, the upper gating box 1 is provided with a molten iron cavity 6 for containing molten iron. A gate 7 is provided at the opening of the upper gating box 1, which divides the molten iron cavity 6 into two parts. A gap is provided between the gate 7 and the bottom inner surface of the upper gating box 1. A step is provided at the bottom of the upper gating box 1, which divides the molten iron cavity 6 into a high surface 8 and a low surface 9. Both the upper gating box 1 and the lower gating box 2 are made of furan resin sand material. The filter screen 3 is made of foam ceramic material. The high surface 8 is 30mm higher than the low surface 9. The opening width of the upper gating box 1 is 380-400mm, and the thickness of the gate 7 is 30-50mm.

[0025] The overall effect of Embodiment 2 is as follows: The upper gating box 1 contains a molten iron cavity 6 for holding molten iron. A gate 7 is installed at the opening of the upper gating box 1, allowing molten iron to be injected from the side without a sprue. This keeps the molten iron surface in the upper gating box 1 almost full without overflowing. Because the density of molten slag is much lower than that of molten iron, the slag in the molten iron always floats on the molten iron injection side of the upper gating box 1. The relatively clean molten iron then flows through the gap at the bottom of the gate 7, passes through the filter screen 3, and enters the casting cavity through the sprues of the upper gating box 1 and lower gating box 2. The gate 7 then divides the molten iron cavity 6 into two parts. A gap is provided between the gate 7 and the bottom inner surface of the upper gating box 1. Since the molten iron flows through the gap at the bottom of the gate 7 into the molten iron cavity 6, the dynamic pressure head of the molten iron is relatively stable and less affected by the height of the ladle outlet, which helps to maintain a stable pouring speed, molten iron filling speed, and flow state. The consistency is good, which is conducive to the stability of casting quality. Furthermore, the bottom of the upper gating box 1 is provided with a step, which divides the molten iron cavity 6 into a high surface 8 and a low surface 9. The step acts as a baffle, which, together with the downward gate 7, facilitates the up-and-down fluctuation of the molten iron flow, thus blocking some of the waste residue in the molten iron. Both the upper gating box 1 and the lower gating box 2 are made of furan resin sand material, and the filter screen 3 is made of foam ceramic material. The gating box is made of furan resin sand material, which is suitable for casting iron parts with a weight of less than 400 kg. The furan resin used in the molding sand of the gating box is used under the following conditions: resin addition of 0.9% to 1.1% and curing agent addition of 45% to 75% of the resin addition. The resin quality meets national standards. The filter screen 3 made of foam ceramic material plays the role of filtering waste residue.

[0026] Working principle: Before use, the inner surface of the gate gating box and the gate plate 7 are coated with a high-temperature resistant special alcohol-based coating. After coating, the coating is ignited and dried using the flammability of the coating. The coating is ready for casting after sintering. Then, the filter screen 3 is placed on top of the first filter screen base 4. The center of the ceramic tube of the lower gating box 2 is visually aligned with the center of the sprue of the mold. Next, a special sealing adhesive is applied to the edge of the lower gating box 2. Then, the upper gating box 1 is closed, and the upper gating box 1 presses down on the filter screen 3, effectively fixing the filter screen 3. During casting, molten iron is poured in from the side without the sprue, keeping the upper gating box in place. 1. The liquid surface is basically full without overflowing. Since the density of slag is much smaller than that of molten iron, the slag in the molten iron always floats on the liquid surface of the molten iron pouring side of the upper gating box 1. The relatively clean molten iron is turned over from the gap under the gate 7 and enters the mold cavity through the sprue of the upper gating box 1 and the lower gating box 2. At the same time, the filter screen 3 can effectively block slag and prevent slag inclusion defects in the casting. Under the action of the filter screen 3, the slag in the molten iron can be "blocked" by the gate 7 and "filtered" by the filter screen 3, which is more conducive to the purity of the filling molten iron and the improvement of the casting quality.

[0027] The above description is merely a preferred embodiment of the present utility model and is not intended to limit the present utility model in any other way. Any person skilled in the art may make changes or modifications to the above-disclosed technical content to create equivalent embodiments for application in other fields. However, any simple modifications, equivalent changes, and modifications made to the above embodiments based on the technical essence of the present utility model without departing from the technical solution of the present utility model shall still fall within the protection scope of the technical solution of the present utility model.

Claims

1. A gate gating box suitable for furan resin sand molding, comprising an upper gating box (1) and a lower gating box (2), characterized in that: The lower gating box (2) is located at the top of the upper gating box (1). A through filter screen (3) is provided at the top of the lower gating box (2). A first filter screen base (4) for fixing the filter screen (3) is provided below the filter screen (3). A second filter screen base (5) for fixing the filter screen (3) is provided at the bottom of the upper gating box (1).

2. The gate gating box for furan resin sand molding according to claim 1, characterized in that: The upper pouring box (1) is provided with a molten iron mold cavity (6) for containing molten iron, and a gate (7) is provided at the opening of the upper pouring box (1).

3. A gate gating box suitable for furan resin sand molding according to claim 2, characterized in that: The gate (7) divides the molten iron cavity (6) into two parts, and a gap is provided between the gate (7) and the bottom inner surface of the upper pouring box (1).

4. A gate gating box suitable for furan resin sand molding according to claim 2, characterized in that: The bottom of the upper pouring box (1) is provided with a step, and the step divides the molten iron cavity (6) into a high surface (8) and a low surface (9) inside the cavity.

5. A gate gating box suitable for furan resin sand molding according to claim 1, characterized in that: The upper gating box (1) and the lower gating box (2) are both made of furan resin sand material, and the filter screen (3) is made of foam ceramic material.

6. A gate gating box suitable for furan resin sand molding according to claim 4, characterized in that: The high surface (8) inside the cavity is 30mm higher than the low surface (9) inside the cavity, the opening width of the upper gate box (1) is 380-400mm, and the thickness of the gate plate (7) is 30-50mm.

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