Pouring port filter element for casting

Abstract

The utility model provides a sprue gate filter part for casting. The sprue gate filter part comprises a mounting base and a filter screen fixed to the lower end of the mounting base. The mounting seat comprises a conical cylindrical base body, an outward upper eave is arranged at the upper end of the base body, an outward lower eave and an inward folded edge are arranged at the lower end of the base body, air holes are formed in the upper eave, air passing holes are formed in the lower eave, a ventilation cavity is formed between the upper eave and the lower eave, and the outer contour of the upper eave is larger than that of the lower edge. The diameter of the central ring of each air hole is smaller than that of the central circle of each air hole; and the outline of the outer wall of the filter screen is positioned in a central circle where the air passing holes of the lower eave are positioned. The filter element is reasonable in structural design, the mounting seat is arranged on the upper side of the filter screen, so that an effective liquid outlet space can be formed on the periphery of the filter screen when the filter element is applied, and the ventilation holes in the upper brim and the air passing holes in the lower brim are communicated with the ventilation cavity, so that the passing ability of molten metal can be improved while the filtering effect is ensured.

Description

Technical Field

[0001] The invention belongs to the technical field of casting, and in particular relates to a pouring port filter for casting. Background Art

[0002] Sand casting refers to a casting method that produces castings in a sand mold. Steel, iron and most nonferrous alloy castings can be obtained by sand casting. Since the molding materials used in sand casting are cheap and easy to obtain, and the mold is easy to manufacture, a pouring port is set at the upper end of the sand box used for single sand casting of castings as a channel for molten steel to enter. However, the molten metal mixed with inclusions or oxide film is directly poured into the sand box, which will cause defects such as bubbles, pores or oxide scale in the casting. Although there is a method of installing a filter plate at the pouring port to filter the molten metal and reduce the above defects in the prior art, most of them have the problem of difficulty in pouring the liquid. During pouring, the molten metal flow rate has to be reduced to prevent the molten metal from overflowing. This operation method not only affects the efficiency, but also affects the casting molding quality in some cases. Therefore, it is necessary to make improvements. Summary of the invention

[0003] In view of this, the present invention aims to overcome the defects in the prior art and proposes a pouring inlet filter for casting.

[0004] To achieve the above object, the technical solution created by the present invention is implemented as follows:

[0005] A casting pouring inlet filter comprises a mounting seat and a filter screen fixed at the lower end of the mounting seat; the mounting seat comprises a conical cylindrical base, the upper end of the base is provided with an outward upper eaves, the lower end of the base is provided with an outward lower eaves and an inward folded edge, and the upper eaves are provided with air holes, the lower eaves are provided with air holes, and a ventilation cavity is formed between the upper eaves and the lower eaves, the outer contour of the upper eaves is larger than the outer contour of the lower edge, and the diameter of the center circle where the air holes are located is smaller than the center circle where the air holes are located; the filter screen hangs downward, and the outer wall contour of the filter screen is within the center circle where the air holes of the lower eaves are located.

[0006] Furthermore, the edge of the folded edge is provided with an arc portion.

[0007] Furthermore, the upper end of the filter is fixed to the installation frame, and the installation frame is fixed to the folded edge.

[0008] Furthermore, the installation frame is welded and fixed to the folded edge.

[0009] Furthermore, the filter screen is made of ceramic material or high temperature resistant fiber material.

[0010] Furthermore, the air holes are arranged close to the outer wall of the substrate.

[0011] Furthermore, the ventilation holes are arranged close to the outer edge of the upper eaves.

[0012] Furthermore, the height of the filter screen is greater than the inner diameter of the filter screen.

[0013] Compared with the prior art, the present invention has the following advantages:

[0014] The invention has a reasonable structural design. By arranging a mounting seat on the upper side of the filter, an effective liquid outlet space can be formed around the filter when the filter element is used. In addition, the air holes on the upper eaves and the air holes on the lower eaves are connected to the ventilation cavity, which can improve the permeability of the molten metal while ensuring the filtering effect. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] The drawings constituting part of the present invention are used to provide a further understanding of the present invention. The exemplary embodiments and descriptions of the present invention are used to explain the present invention and do not constitute an improper limitation on the present invention. In the drawings:

[0016] Figure 1 It is a schematic diagram of the structure of the present invention;

[0017] Figure 2 A schematic diagram of a mounting base in the invention;

[0018] Figure 3 This is a schematic diagram of the present invention when installing and applying. DETAILED DESCRIPTION

[0019] It should be noted that, in the absence of conflict, the embodiments of the present invention and the features in the embodiments may be combined with each other.

[0020] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside" and the like indicate positions or positional relationships based on the positions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention. In addition, the terms "first", "second", etc. are only used for descriptive purposes, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, features defined as "first", "second", etc. may explicitly or implicitly include one or more of the features. In the description of the present invention, unless otherwise specified, "multiple" means two or more.

[0021] In the description of the invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installation", "connection" and "connection" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the invention can be understood according to specific circumstances.

[0022] The present invention will be described in detail below with reference to the accompanying drawings and in combination with embodiments.

[0023] A casting pouring filter, such as Figures 1 to 3 As shown, it includes a mounting base 1 and a filter screen 2 fixed at the lower end of the mounting base; the mounting base includes a conical cylindrical base 3, the upper end of the base is provided with an outward upper eaves 4, the lower end of the base is provided with an outward lower eaves 5 and an inward folded edge 6, and an air hole 7 is provided on the upper eaves, and an air hole 8 is provided on the lower eaves, and a ventilation cavity 9 is formed between the upper eaves and the lower eaves, the outer contour of the upper eaves is larger than the outer contour of the lower edge, and the diameter of the center circle where each air hole is located is smaller than the center circle where each air hole is located; the filter screen is suspended downward, and the outer wall contour of the filter screen is within the center circle where each air hole of the lower eaves is located.

[0024] When applied, such as Figure 3 As shown, the lower edge is stuck at the step of the pouring port, and a ventilation cavity is left between the outer wall of the filter screen and the inner wall of the pouring port to ensure that ventilation is achieved from the ventilation cavity during the pouring of the molten metal, avoiding difficulties in the molten metal being poured down.

[0025] The edge of the folded edge is provided with an arc portion 10. The upper end of the filter screen is fixed to the mounting frame, and the mounting frame is fixed to the folded edge. As an example, the mounting frame is welded and fixed to the folded edge. The filter element can be removed regularly to clean the filter screen part, and can also be replaced as needed. Usually, the filter screen is made of ceramic material or high temperature resistant fiber material. The air holes are arranged near the outer wall of the base. The air holes are arranged near the outer edge of the upper eaves. The height of the filter screen is greater than the inner diameter of the filter screen.

[0026] The invention has a reasonable structural design. By arranging a mounting seat on the upper side of the filter, an effective liquid outlet space can be formed around the filter when the filter element is used. In addition, the air holes on the upper eaves and the air holes on the lower eaves are connected to the ventilation cavity. While ensuring the filtering effect, the permeability of the molten metal can also be improved, thereby improving the problem of limited molten metal flow in the prior art.

[0027] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. A casting pouring filter, characterized in that: It includes a mounting base and a filter screen fixed at the lower end of the mounting base; the mounting base includes a conical cylindrical base, the upper end of the base is provided with an outward upper eaves, the lower end of the base is provided with an outward lower eaves and an inward folded edge, and an air vent is provided on the upper eaves, and an air passage hole is provided on the lower eaves, and a ventilation cavity is formed between the upper eaves and the lower eaves, the outer contour of the upper eaves is larger than the outer contour of the lower edge, and the diameter of the center circle where each air passage hole is located is smaller than the center circle where each air passage hole is located; the filter screen hangs downward, and the outer wall contour of the filter screen is within the center circle where each air passage hole of the lower eaves is located.

2. A casting pouring gate filter according to claim 1, characterized in that: The edge of the folded edge is provided with an arc portion.

3. A casting pouring gate filter according to claim 1, characterized in that: The upper end of the filter is fixed to the installation frame, and the installation frame is fixed to the folded edge.

4. A casting pouring gate filter according to claim 3, characterized in that: The installation frame is welded and fixed to the folded edge.

5. A casting pouring gate filter according to claim 1, characterized in that: The filter screen is made of ceramic material or high temperature resistant fiber material.

6. A casting pouring gate filter according to claim 1, characterized in that: The air holes are arranged close to the outer wall of the substrate.

7. A casting pouring gate filter according to claim 1, characterized in that: The ventilation holes are arranged close to the outer edge of the upper eaves.

8. The casting pouring gate filter according to claim 1, characterized in that: The height of the filter screen is greater than the inner diameter of the filter screen.

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