Gate-type casting pouring shell

Abstract

The utility model discloses a gate-type casting pouring shell, which comprises a casting shell, a cross gate and a sprue, the bottom of the casting shell is connected with two extension shells, two ends of the cross gate are respectively connected with the two extension shells, the inner side walls of the sprue and the cross gate are respectively coated with a surface layer, and the surface layers are respectively coated on the inner side walls of the sprue and the cross gate. The outer surface of the sprue and the outer surface of the cross gate are each coated with a reinforcing layer; the inner walls of the sprue and the cross gate are coated with the surface layers, and the outer surfaces of the sprue and the cross gate are coated with the reinforcing layers, so that the inner walls of the sprue and the cross gate are smooth, small in resistance, high in refractoriness, high in molten metal scouring resistance and high in molten metal erosion resistance, the strength of the pouring gate is improved, the pouring gate is prevented from absorbing water, meanwhile, the arranged extending shell is used for precipitating molten metal impurities, and the service life of the pouring gate is prolonged. The defects of slag inclusion and shrinkage porosity of the casting are overcome, and the product quality of the casting is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of casting, in particular to a gate type casting casting shell. Background Art

[0002] The pouring system in sand casting includes a pouring cup, a sprue, a runner, an inner runner and a riser. The sprue and the runner are multifunctional components in the casting process. They not only help distribute the flow of molten metal and block impurities, but also help preheat the mold, compensate for shrinkage of the casting, improve flow distribution, reduce resistance loss, and remove gas and impurities in the molten metal. Most of the current runners are made of clay or high-aluminum refractory materials, which are formed by molding with molds and calcined at high temperatures. However, the inner wall of the existing molding runner has poor finish and sharp protrusions. The time span from the manufacturer to the user is large, it is easy to absorb moisture, and the refractoriness is unstable, which has a great impact on the quality of the casting, and it is easy to produce pores and slag inclusion defects. In addition, the gate-type structure castings generally adopt bottom pouring. The metal impurities in the molten metal are easy to precipitate at the bottom of the casting, causing slag inclusion and shrinkage at the bottom of the casting, affecting the quality of the casting. For this reason, the present application proposes a gate casting casting shell to solve the above problems. Utility Model Content

[0003] The main purpose of the utility model is to provide a gate-type casting casting shell, which can effectively solve the problems in the background technology.

[0004] In order to solve the above technical problems, the technical solution adopted by the utility model is: a portal casting mold shell, which includes a casting mold shell, a cross runner and a straight runner, the bottom of the casting mold shell is connected to two extended mold shells, the two ends of the cross runner are respectively connected to the two extended mold shells, the inner side walls of the straight runner and the cross runner are coated with a surface layer, and the outer surfaces of the straight runner and the cross runner are coated with a reinforcement layer.

[0005] Preferably, the two extended shells are symmetrically arranged.

[0006] Preferably, the two extended shells are distributed in an "eight" shape.

[0007] Preferably, a tangent circular shell is provided at the bottom of the extended shell, and two ends of the circular shell extend out of two sides of the extended shell.

[0008] Preferably, the axis of the runner intersects with the axis of the circular shell.

[0009] Preferably, the surface layer is a corundum powder layer or a corundum sand layer.

[0010] Preferably, the reinforcement layer is a mullite powder layer.

[0011] Preferably, a sealing layer is provided on the outer side of the reinforcement layer.

[0012] Compared with the traditional technology, the beneficial effects produced by the utility model are as follows: the utility model coats the inner wall of the sprue and the runner with a surface layer, and applies a reinforcement layer on the outer surface, so that the inner wall of the sprue and the runner is smooth, has low resistance, high refractoriness, strong resistance to erosion by molten metal, and improves the strength of the runner to prevent the runner from absorbing moisture. At the same time, the extended mold shell is provided to precipitate impurities in the molten metal, solves the defects of slag inclusion and shrinkage in the casting, and improves the product quality of the casting. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] In order to more clearly illustrate the scheme in the utility model, a brief introduction is given below to the drawings required for use in the description of the embodiments. Obviously, the drawings described below are some embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0014] Figure 1 It is a three-dimensional schematic diagram of the overall structure of the utility model;

[0015] Figure 2 It is a front view schematic diagram of the overall structure of the utility model;

[0016] Figure 3 It is a top view of the overall structure of the utility model;

[0017] Figure 4 For the utility model Figure 3 AA cross-sectional diagram of ;

[0018] Figure 5 for Figure 4 Enlarged schematic diagram of point B in the middle.

[0019] The markings in the figure are as follows:

[0020] 1. Casting shell; 2. Horizontal runner; 3. Straight runner; 4. Extended shell; 5. Surface layer; 6. Reinforcement layer; 7. Round shell; 8. Sealing layer. DETAILED DESCRIPTION

[0021] In order to enable those skilled in the art to better understand the solution of the utility model, the technical solution in the embodiment of the utility model will be clearly and completely described below in conjunction with the drawings in the embodiment of the utility model. Obviously, the described embodiment is only a part of the embodiment of the utility model, not all of the embodiments. Based on the embodiment of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work should fall within the scope of protection of the utility model.

[0022] In order to enable those skilled in the art to better understand the solution of the utility model, the technical solution in the embodiment of the utility model will be clearly and completely described below in conjunction with the accompanying drawings.

[0023] Please refer to Figure 1-5 , provides a portal casting mold shell, which includes a casting mold shell 1, a cross runner 2 and a straight runner 3, the cross runner 2 and the straight runner 3 are both circular and made of clay, the bottom of the casting mold shell 1 is connected to two extended mold shells 4, the two ends of the cross runner 2 are respectively connected to the two extended mold shells 4, the inner side walls of the straight runner 3 and the cross runner 2 are coated with a surface layer 5, and the outer surfaces of the straight runner 3 and the cross runner 2 are coated with a reinforcement layer 6.

[0024] The two extension shells 4 are symmetrically arranged. The extension shells 4 are of a frustum structure, and the small faces are connected to the casting shell 1. The two extension shells 4 are distributed in an "eight" shape, and the ends away from the casting shell 1 are away from each other.

[0025] A tangent circular shell 7 is provided at the bottom of the extended shell 4, and both ends of the circular shell 7 extend out of both sides of the extended shell 4, and the axis of the cross runner 2 intersects with the axis of the circular shell 7. The molten metal enters the circular shell 7 through the cross runner 2 and impacts the inner arc surface of the circular shell 7, which can buffer the impact force of the molten metal.

[0026] The surface layer 5 is a corundum powder layer or a corundum sand layer, the reinforcement layer 6 is a mullite powder layer, and a sealing layer 8 is provided on the outside of the reinforcement layer 6. After the horizontal runner 2 and the straight runner 3 of different specifications are prepared in the molding mold, a surface layer 5 is coated on the inner surface of the two runners, and then a reinforcement layer 6 is coated on the outer surface, and finally the sealing layer 8 is coated, and the two ends of the sealing layer 8 are scraped off, and then dewaxing is carried out, and finally sintering is carried out at a temperature above 950°C.

[0027] The working principle of the utility model is as follows: a surface layer 5 is coated on the inner wall of the sprue 3 and the runner 2, and a reinforcement layer 6 is applied on the outer surface, so that the inner wall of the sprue 3 and the runner 2 is smooth, has low resistance, high refractoriness, strong resistance to erosion by molten metal, and improves the strength of the runner to prevent the runner from absorbing moisture. At the same time, the extended shell 4 is provided to precipitate impurities in the molten metal, solves the defects of slag inclusion and shrinkage in the casting, and improves the product quality of the casting.

[0028] In the present invention, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral one; it can be a mechanical connection, an electrical connection, or communication with each other; it can be a direct connection, or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements, unless otherwise clearly defined. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0029] Obviously, the embodiments described above are only some embodiments of the utility model, rather than all embodiments. The preferred embodiments of the utility model are given in the accompanying drawings, but they do not limit the patent scope of the utility model. The utility model can be implemented in many different forms. On the contrary, the purpose of providing these embodiments is to make the understanding of the disclosure of the utility model more thorough and comprehensive. Although the utility model is described in detail with reference to the aforementioned embodiments, for those skilled in the art, it is still possible to modify the technical solutions recorded in the aforementioned specific implementation methods, or to replace some of the technical features therein with equivalents. Any equivalent structure made using the contents of the utility model specification and the accompanying drawings, directly or indirectly used in other related technical fields, is also within the scope of patent protection of the utility model.

Claims

1. A portal casting casting shell, comprising a casting shell, a runner and a sprue, characterized in that: The bottom of the casting mold shell is connected to two extended mold shells, the two ends of the cross runner are respectively connected to the two extended mold shells, the inner side walls of the straight runner and the cross runner are coated with a surface layer, and the outer surfaces of the straight runner and the cross runner are coated with a reinforcement layer.

2. A portal casting mold shell according to claim 1, characterized in that: The two extended shells are symmetrically arranged.

3. A portal casting mold shell according to claim 2, characterized in that: The two extended shells are distributed in an "eight" shape.

4. A portal casting mold shell according to claim 1, characterized in that: A tangent circular shell is disposed at the bottom of the extended shell, and two ends of the circular shell extend out of two sides of the extended shell.

5. A portal casting mold shell according to claim 4, characterized in that: The axis of the runner intersects with the axis of the circular shell.

6. The portal casting mold according to claim 1, characterized in that: The surface layer is a corundum powder layer or a corundum sand layer.

7. The portal casting mold according to claim 1, characterized in that: The reinforcement layer is a mullite powder layer.

8. A portal casting mold shell according to claim 7, characterized in that: A sealing mortar layer is arranged on the outer side of the reinforcement layer.

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