Impact performance detection device for foamed ceramic filter

Abstract

The utility model relates to an impact performance detection device of a foamed ceramic filter, which comprises an upper sand mold and a lower sand mold, the upper sand mold and the lower sand mold are both of an up-down opening structure, the upper end opening of the upper sand mold is larger than the lower end opening of the upper sand mold, the upper end opening of the lower sand mold is smaller than the lower end opening of the lower sand mold, and the upper sand mold is connected above the lower sand mold. The lower end opening of the upper sand mold corresponds to the upper end opening of the lower sand mold in size, the lower end opening of the lower sand mold is connected with the crucible, and the foamed ceramic filter is clamped between the two inner side walls of the lower sand mold. By detecting the impact performance of the foamed ceramic filter in the casting field, whether the impact performance of the foamed ceramic filter is qualified or not and whether the foamed ceramic filter can meet field use or not can be detected. In actual production, it can be guaranteed that the foamed ceramic filter has certain impact resistance, the defect of slag inclusion of a casting caused by the fact that the foamed ceramic filter is broken during mold filling of molten iron in production is avoided, and the quality of the casting is further improved.

Description

Technical Field

[0001] The utility model relates to an impact performance detection device for a foam ceramic filter sheet, belonging to the technical field of auxiliary processing equipment used in the casting industry. Background Art

[0002] In the field of casting, foam ceramic filter is one of the most commonly used raw and auxiliary materials in sand casting. Foam ceramic filter has an excellent filtering effect on molten copper or molten iron. It uses its own three-dimensional structure to effectively remove oxide inclusions and other non-metallic inclusions by blocking, capturing and adsorbing. Whether it is gray iron, ductile iron, shaft body, cylinder body or complex large parts, precision hardware parts, the product quality will be satisfactory. Foam ceramic filter is also suitable for copper alloys such as copper, bronze, and brass to reduce copper molten turbulence and rectify and purify molten copper. What is particularly valuable is that the life of filtered and purified copper castings is significantly extended in high-demand or harsh environments such as marine ship turbines and chemical parts, and it also has a good effect on copper castings with surface polishing requirements.

[0003] The main purpose of the foam ceramic filter is to filter out slag inclusions in molten iron, making the molten iron purer and reducing the occurrence of slag inclusion defects in castings, thereby obtaining excellent castings. During pouring, the molten iron is poured from the pouring ladle into the mold cavity (for the casting process of pouring and rising in one, the foam ceramic filter is placed at the connection between the pouring cup and the riser), and the impact force of the first stream of molten iron directly impacts the surface of the foam ceramic filter. If the foam ceramic filter does not have sufficient impact performance, it is easy to be broken and broken by the molten iron, and the filter will not play the role of filtering the molten iron. Instead, the residue of the broken and broken foam ceramic filter will enter the mold cavity along with the molten iron, forming slag inclusions in the casting and on the surface of the casting, causing the casting to be scrapped. Therefore, there is an urgent need for a device that can test the impact performance of the foam ceramic filter. Utility Model Content

[0004] The content of this application is used to introduce concepts in a brief form, which will be described in detail in the detailed implementation section below. The content of this application is not intended to identify the key features or essential features of the technical solution claimed for protection, nor is it intended to limit the scope of the technical solution claimed for protection.

[0005] In view of the problems and shortcomings in the prior art, the utility model aims to provide an impact performance detection device for a foam ceramic filter. By using the detection device of the utility model, a specified amount of molten iron quickly impacts the foam ceramic filter through a height difference, and according to the surface state of the foam ceramic filter after filtering the molten iron, the corresponding surface defect map is compared to determine whether the foam ceramic filter meets the impact performance. In this way, the problems in the above-mentioned background technology are solved.

[0006] To achieve the above-mentioned purpose, the utility model provides the following technical solution: it includes an upper sand mold and a lower sand mold, both of which are upper and lower opening structures, the lower end opening of the upper sand mold is connected to the upper end opening of the lower sand mold, the lower end opening of the lower sand mold is connected to the upper end opening of the crucible, and the lower end opening of the upper sand mold is the same size as the upper end opening of the lower sand mold, and the foam ceramic filter plate is clamped between the two inner side walls of the lower sand mold.

[0007] The utility model is composed of an upper sand mold, a lower sand mold and a crucible connected in sequence, and the upper sand mold and the lower sand mold are both set to a structure with upper and lower openings, the upper end opening of the upper sand mold is larger than the lower end opening, and the upper end opening of the lower sand mold is smaller than the lower end opening, and the lower end opening of the upper sand mold is the same size as the upper end opening of the lower sand mold. During the test, the molten iron is quickly poured from the upper end opening of the upper sand mold, and the molten iron flows through the upper sand mold and the lower sand mold in turn, and quickly flows through the foam ceramic filter plate clamped in the lower sand mold, and finally flows into the crucible set below. After cooling, take out the foam ceramic filter plate and check its surface state. By comparing the surface defect map, it can be determined whether its impact performance is qualified.

[0008] Preferably, the upper opening of the upper sand mold is larger than the lower opening, while the upper opening of the lower sand mold is smaller than the lower opening. The upper opening of the upper sand mold is set to be larger than the lower opening, and the upper opening of the lower sand mold is set to be smaller than the lower opening. That is, the upper sand mold is set to a funnel structure, and the lower sand mold is set to an inverted funnel structure, which can accelerate the flow of molten iron in the upper sand mold and the lower sand mold.

[0009] Preferably, a piston rod is placed inside the upper sand mold, and the lower end of the piston rod abuts against a protrusion provided on the inner side wall of the upper sand mold. Since the upper sand mold and the lower sand mold with upper and lower openings are connected, that is, the inner sides of the upper sand mold and the lower sand mold are connected to form a channel for the molten iron to flow through. The lower end of the piston rod is set to a trapezoidal structure, and abuts against an inward protrusion provided on the inner side wall of the upper sand mold, so that the channel formed by the connection between the inner sides of the upper sand mold and the lower sand mold can be blocked. When testing, pour the molten iron from the upper opening of the upper sand mold. Then pull out the piston rod, so that the molten iron in the upper sand mold instantly and rapidly flows into the lower sand mold, and then accelerates the impact on the foam ceramic filter in the lower sand mold, and finally the molten iron flows into the crucible.

[0010] Preferably, the height difference between the piston rod and the foam ceramic filter is greater than 500 mm. When the piston rod is used to accelerate the flow of molten iron, it is necessary to ensure that the height difference between the piston rod and the foam ceramic filter is greater than 500 mm.

[0011] Preferably, the piston rod is made of ceramic material. Ceramic material refers to a type of inorganic non-metallic material made by forming and sintering natural or synthetic compounds at high temperature, which has the advantages of high melting point, high hardness, high wear resistance and oxidation resistance. Since ceramic materials have stable chemical properties, small thermal expansion coefficient and low thermal conductivity, they also have extremely high high temperature resistance. If the piston rod is made of ceramic material, the piston rod can be used normally in the high-temperature molten iron in the upper sand mold.

[0012] Compared with the prior art, the beneficial effects of the utility model are:

[0013] The utility model has the characteristics of simple structure and convenient use, mainly including an upper sand mold, a lower sand mold and a crucible connected in sequence, the lower end opening of the upper sand mold corresponds to the upper end opening of the lower sand mold, the lower end opening of the lower sand mold corresponds to the crucible, and the foam ceramic filter is clamped between the two inner side walls of the lower sand mold. When in use, the molten iron is poured from the upper end opening of the upper sand mold, and the flow of the molten iron is accelerated by combining the use of a piston rod. The molten iron flows through the lower foam ceramic filter and finally flows into the crucible below. After the molten iron is cooled, the foam ceramic filter is taken out and its surface state is checked, and its impact performance can be determined by comparing the surface defect map. By testing the impact performance of the foam ceramic filter in the casting field, it is possible to detect whether the impact performance of the foam ceramic filter is qualified and whether it can meet the use on site. In actual production, it can be ensured that the foam ceramic filter has a certain impact resistance, and it is avoided that the foam ceramic filter is broken when the molten iron is filled in production, resulting in the defect of slag inclusion in the casting, and the quality of the casting is further improved. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] The drawings constituting a part of this application are used to provide a further understanding of this application, so that other features, purposes and advantages of this application become more obvious. The illustrative embodiment drawings and their descriptions of this application are used to explain this application and do not constitute an improper limitation on this application.

[0015] In the attached picture:

[0016] Figure 1 : It is a cross-sectional structural connection diagram of the utility model;

[0017] Figure 2 : It is a schematic diagram of the mold structure of the upper sand mold in the utility model;

[0018] Figure 3 : It is a schematic diagram of the mold structure of the middle and lower sand mold of the utility model;

[0019] Figure 4 : It is a schematic diagram of the structure of the upper sand mold in the utility model when viewed from the front and from above;

[0020] Figure 5: It is a schematic structural diagram of the lower sand mold in the utility model when viewed from the front and top.

[0021] Marked in the figure are: 1, crucible; 2, foam ceramic filter; 3, upper sand mold; 4, lower sand mold; 5, piston rod; 301, upper sand mold fixed mold; 302, upper sand mold movable mold; 303, upper sand mold mold movable block; 401, lower sand mold fixed mold; 402, lower sand mold movable mold; 403, lower sand mold mold movable block. DETAILED DESCRIPTION

[0022] Embodiments of the present disclosure will be described in more detail below with reference to the accompanying drawings. Although certain embodiments of the present disclosure are shown in the accompanying drawings, it should be understood that the present disclosure can be implemented in various forms and should not be construed as being limited to the embodiments set forth herein. On the contrary, these embodiments are provided to provide a more thorough and complete understanding of the present disclosure. It should be understood that the drawings and embodiments of the present disclosure are only for exemplary purposes and are not intended to limit the scope of protection of the present disclosure.

[0023] It should also be noted that, for ease of description, only the parts related to the relevant utility model are shown in the drawings. In the absence of conflict, the embodiments and features in the embodiments of the present disclosure can be combined with each other.

[0024] The utility model discloses an impact performance detection device for a foam ceramic filter sheet, which will be described in detail below with reference to the accompanying drawings and in combination with embodiments.

[0025] This embodiment provides a device for detecting the impact performance of a foam ceramic filter. Figure 1-5 As shown: it includes an upper sand mold 3 and a lower sand mold 4, both of which are upper and lower opening structures, the lower end opening of the upper sand mold 3 is connected to the upper end opening of the lower sand mold 4, the lower end opening of the lower sand mold 4 is connected to the upper end opening of the crucible 1, and the lower end opening of the upper sand mold 3 is the same size as the upper end opening of the lower sand mold 4, and the foam ceramic filter plate 2 is clamped between the two inner side walls of the lower sand mold 4.

[0026] This embodiment also includes that the upper end opening of the upper sand mold 3 is larger than the lower end opening, and the upper end opening of the lower sand mold 4 is smaller than the lower end opening. The upper end opening of the upper sand mold 3 is set to be larger than the lower end opening, and the upper end opening of the lower sand mold 4 is set to be smaller than the lower end opening. That is, the upper sand mold 3 is set to a funnel structure, and the lower sand mold 4 is set to an inverted funnel structure, which can accelerate the flow of molten iron in the upper sand mold 3 and the lower sand mold 4.

[0027] The present embodiment also includes that a piston rod 5 is placed inside the upper sand mold 3, and the lower end of the piston rod 5 is against the convexity provided on the inner side wall of the upper sand mold 3, and the height difference between the piston rod 5 and the foam ceramic filter 2 is greater than 500mm, and the piston rod 5 is made of ceramic material. By the lower end of the piston rod 5 and the convexity provided on the inner side wall of the upper sand mold 3, the passage formed by connecting the upper sand mold 3 with the inner side of the lower sand mold 4 can be blocked. Then when testing, the molten iron is poured into the upper end opening of the upper sand mold 3. Then the piston rod 5 is pulled out, so that the molten iron in the upper sand mold 3 flows into the lower sand mold 4 instantly and rapidly, and the foam ceramic filter 2 in the lower sand mold 4 is accelerated to impact. The piston rod 5 made of ceramic material can be used normally in the high-temperature molten iron in the upper sand mold 3.

[0028] Method of using the utility model

[0029] The utility model is composed of an upper sand mold 3, a lower sand mold 4 and a crucible 1. The upper sand mold 3 and the lower sand mold 4 are both designed as structures with upper and lower openings, the lower end opening of the upper sand mold 3 is connected to the upper end opening of the lower sand mold 4, and the lower end opening of the lower sand mold 4 is connected to the upper end opening of the crucible 1. The crucible 1 is used to receive the molten iron filtered through the foam ceramic filter sheet 2 during the test. In particular, the upper end opening of the upper sand mold 3 is larger than the lower end opening, and the upper end opening of the lower sand mold 4 is smaller than the lower end opening, which can accelerate the flow of the internal molten iron.

[0030] The molds for making the upper sand mold 3 and the lower sand mold 4 are respectively the upper sand mold fixed mold 301, the upper sand mold movable mold 302 and the lower sand mold fixed mold 401, the lower sand mold movable mold 402, the upper sand mold fixed mold 301 and the lower sand mold fixed mold 401 are used to define the shape and size of the upper sand mold 3 and the lower sand mold 4, and the upper sand mold movable mold 302 and the lower sand mold movable mold 402 are used to realize the forming, demoulding and return process of the upper sand mold 3 and the lower sand mold 4. In addition, the upper sand mold fixed mold 301 and the lower sand mold fixed mold 401 are provided with an upper sand mold movable block 303 and a lower sand mold movable block 403 to facilitate the mold removal after forming.

[0031] First, make the upper sand mold 3. Use coated sand to make the left and right sides of the upper sand mold in the upper sand mold fixed mold 301 and the upper sand mold movable mold 302, glue in the glue grooves of the left upper sand mold and the right upper sand mold, assemble the left upper sand mold and the right upper sand mold, and then tighten them with a screw to make a mold. Then make the lower sand mold 4. Use coated sand to make the left and right sides of the lower sand mold in the lower sand mold fixed mold 401 and the lower sand mold movable mold 402, glue in the glue grooves of the left lower sand mold and the right lower sand mold, assemble the left lower sand mold and the right lower sand mold, and then tighten them with a screw to make a mold. Finally, assemble the upper sand mold 3 and the lower sand mold 4 after the molding is completed, and after assembly, use a screw to tighten the upper sand mold 3 and the lower sand mold 4 together. The fastened upper sand mold 3 and lower sand mold 4 are then placed above the crucible 1, and a piston rod 5 made of ceramic material is placed in the middle of the upper sand mold. The height difference between the placement position of the piston rod 5 and the foam ceramic filter 2 is greater than 500 mm.

[0032] Before the test, the piston rod 5 is against the protrusions set on the inner wall of the upper sand mold 3, that is, the channel formed by the connection between the upper sand mold 3 and the lower sand mold 4 is blocked. During the test, after 50kg of molten iron is completely poured into the upper opening of the upper sand mold 3, it is the maximum weight of molten iron in a single box used in actual production on site. Then pull out the piston rod 5, so that the molten iron in the upper sand mold 3 quickly flows into the lower sand mold 4, and at the same time accelerates the impact of the foam ceramic filter 2 and then flows into the crucible 1. After it cools down, remove the foam ceramic filter 2 to check its surface state, and compare it with the surface defect map of the foam ceramic filter 2 to determine whether the impact performance of the foam ceramic filter 2 is qualified.

[0033] In the description of the present invention, it is necessary to understand that the indicated orientation or positional relationship is based on the orientation or positional relationship shown in the accompanying drawings, and is 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.

[0034] In addition to the above embodiments, the present invention may also have other implementation modes. For those skilled in the art, the technical solutions described in the above embodiments may still be modified, or some of the technical features may be replaced by equivalents. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. A device for detecting the impact performance of a foam ceramic filter, characterized in that: The invention comprises an upper sand mold (3) and a lower sand mold (4), wherein the upper sand mold (3) and the lower sand mold (4) are both upper and lower opening structures, the lower end opening of the upper sand mold (3) is connected to the upper end opening of the lower sand mold (4), the lower end opening of the lower sand mold (4) is connected to the upper end opening of the crucible (1), and the lower end opening of the upper sand mold (3) is the same size as the upper end opening of the lower sand mold (4), and a foam ceramic filter sheet (2) is clamped between the two inner side walls of the lower sand mold (4).

2. The impact performance testing device for a foam ceramic filter according to claim 1, characterized in that: The upper end opening of the upper sand mold (3) is larger than the lower end opening, while the upper end opening of the lower sand mold (4) is smaller than the lower end opening.

3. The impact performance testing device for a foam ceramic filter according to claim 1, characterized in that: A piston rod (5) is placed inside the upper sand mold (3), and two sides of the lower end of the piston rod (5) abut against protrusions arranged inwardly on the inner wall of the upper sand mold (3).

4. The impact performance testing device for a foam ceramic filter according to claim 3, characterized in that: The height difference between the piston rod (5) and the foam ceramic filter (2) is greater than 500 mm.

5. The impact performance testing device for a foam ceramic filter according to claim 4, characterized in that: The piston rod (5) is made of ceramic material.

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