Foundry sand collapsibility detection device

Abstract

The utility model discloses a foundry sand collapsibility detection device, relates to the technical field of foundry sand collapsibility detection, and aims to solve the problems that in the prior art, foundry sand detection is not accurate enough, and collapsibility conditions of various foundry sands cannot be compared at a time. A detachable mold is arranged above the vibration mechanism and comprises a plurality of mold cavities, casting cavities are formed in the mold cavities through casting sand, connecting pieces are arranged at the bottoms of the mold cavities in a penetrating mode, and the ends, arranged in the mold cavities, of the connecting pieces stretch into the casting cavities. And one end, extending out of the die cavity, of the connecting piece is connected to the vibration mechanism.

Description

Technical Field

[0001] This utility model relates to the technical field of casting sand collapsibility testing, and specifically to a casting sand collapsibility testing device. Background Technology

[0002] Foundry sand is a granular refractory material used in casting production to prepare sand molds and sand cores. It is usually mixed with clay in a certain proportion to form cavities of a specified shape for casting.

[0003] Foundry sand includes quartz sand, quartz feldspar sand, and clay sand, each with different properties. Before casting, a suitable foundry sand must be selected to prepare the sand mold and core. When selecting foundry sand, various indicators need to be measured. Collapsibility is one of the key indicators. Collapsibility refers to the ease or difficulty of breaking the sand mold and core after the casting has been poured and solidified; it is also called sand removal capability. Different casting requirements dictate different requirements for the collapsibility of the foundry sand. For example, if the casting needs to be held at a high temperature for a long time, the foundry sand needs to have lower collapsibility, meaning the sand mold and core are less likely to break. Conversely, if the casting needs to be cooled quickly to improve production efficiency, the foundry sand needs to have higher collapsibility, meaning the sand mold and core are easier to break.

[0004] In existing technologies, the testing devices for the collapsibility of foundry sand typically use high-pressure nozzles to spray foundry sand onto a designated test object, apply mechanical vibration, and determine its collapsibility by the amount of sand that is shaken off. However, in actual casting operations, foundry sand is in direct contact with molten alloy at a high temperature, and the heating conditions of the two are different, resulting in different stress distributions within the sand. Therefore, existing technologies for testing the collapsibility of foundry sand are not accurate enough. Furthermore, existing technologies usually only test one type of foundry sand at a time. If it is necessary to compare the conditions of multiple types of foundry sand, each type of foundry sand must be tested separately before comparing their collapsibility, which is very cumbersome. Utility Model Content

[0005] To address the aforementioned issues—namely, the inaccuracy of existing methods for detecting foundry sand and the inability to simultaneously compare the collapsibility of various types of foundry sand—this invention proposes a foundry sand collapsibility detection device. The device includes a vibration mechanism, a detachable mold positioned above the vibration mechanism, and multiple mold cavities within each cavity. Each cavity contains a casting cavity formed by the deposition of foundry sand. A connector is inserted through the bottom of each cavity, with one end extending into the casting cavity and the other end connecting to the vibration mechanism.

[0006] By adopting the above technical solution, the casting cavity built into the mold can be used for actual casting testing. This ensures that the casting sand comes into contact with the molten alloy during the actual casting process, thereby guaranteeing that the stress changes generated inside the cavity during testing are the same as those during actual casting. This further makes the testing of the collapsibility of the casting sand more accurate. Simultaneously, different types of casting sand can be used to build molds in multiple cavities, allowing for simultaneous testing of the collapsibility of various types of casting sand.

[0007] A further feature of this invention is that the mold includes two templates connected by bolts, and each template has a plurality of semicircular cavities, the two semicircular cavities of which together constitute a mold cavity.

[0008] By adopting the above technical solution, the mold can be disassembled, and after casting is completed, the mold can be disassembled and mechanical vibration can be applied to it to cause the casting sand to break apart, thereby measuring the amount of casting sand breakup and thus obtaining the breakup property of the casting sand.

[0009] A further feature of this invention is that a sand collecting cylinder is provided below the mold, the sand collecting cylinder is mounted on the vibration mechanism, and the connecting member passes through the sand collecting cylinder.

[0010] By adopting the above technical solution, the disintegrated foundry sand can fall directly into the sand collection cylinder, and the disintegration of the foundry sand can be clearly determined based on the amount of foundry sand in the sand collection cylinder. At the same time, the problem of difficult-to-clean disintegrated foundry sand can also be avoided.

[0011] A further feature of this invention is that the vibration mechanism includes a vibration plate, the sand collecting cylinder is disposed on the upper surface of the vibration plate, the connecting member is disposed through the vibration plate, and a vibration device is disposed on the lower surface of the vibration plate for driving the vibration plate to vibrate.

[0012] By adopting the above technical solution, the vibration device can transmit vibration to multiple connectors through the vibration plate, thereby causing the casting sand wrapped on the connectors to disintegrate under vibration. Furthermore, by transmitting vibration to multiple connectors through the vibration plate, the vibration frequency on multiple connectors can be the same, thus avoiding the impact on the test results due to different vibration frequencies.

[0013] A further feature of this invention is that it includes a fixing frame, which is U-shaped, the vibration device is mounted on the bottom surface of the fixing frame, and the two ends of the vibration plate are slidably connected to the two side plates of the fixing frame through sliding grooves.

[0014] By adopting the above technical solution, the chute can guide the vibration direction during vibration and limit the vibration plate, thus preventing the vibration plate from deviating during vibration.

[0015] A further feature of this invention is that both sides of the fixing frame are provided with snap-fit ​​grooves, and both ends of the mold extend into the snap-fit ​​grooves.

[0016] By adopting the above technical solution, the snap-fit ​​groove can limit the position of the mold.

[0017] A further feature of this invention is that the upper cover of the connector is integrally provided with a snap-fit ​​part, the snap-fit ​​part is snapped onto the top of the sand collecting cylinder, and the end of the connector facing away from the casting cavity is threaded with a clamping nut for fixing the connector and the sand collecting cylinder.

[0018] By adopting the above technical solution, the engagement of the snap-fit ​​part and the clamping nut enables the connector, sand collection cylinder and vibrating plate to be clamped and fixed, so that there will be no shaking during vibration. After the vibration is over, the connector and sand collection cylinder can be removed from the vibrating plate, making it easier to replace the connector and pour out the casting sand in the sand collection cylinder.

[0019] The beneficial effects of this utility model are as follows:

[0020] By setting up molds and vibration mechanisms, the casting sand can be made to come into contact with the molten alloy during actual casting, thus ensuring that the stress changes generated inside the sand during testing are the same as those during actual casting. This further makes the testing of the collapsibility of the casting sand more accurate. Simultaneously, different types of casting sand can be used to build molds in multiple cavities, allowing for simultaneous testing of the collapsibility of various types of casting sand. Attached Figure Description

[0021] Figure 1 A schematic diagram of the structure of this utility model is shown.

[0022] Figure 2 The cross-sectional view shown along the AA direction.

[0023] Figure 3 A schematic diagram of the sand collection cylinder is shown.

[0024] Figure 4 A schematic diagram of the template structure is shown.

[0025] Figure 5 A magnified view of a portion at point A is shown.

[0026] Reference numerals: 1. Fixing frame; 11. Slide groove; 12. Snap-fit ​​groove; 2. Vibration mechanism; 21. Vibration plate; 22. Vibration device; 3. Mold; 31. Template; 311. Semicircular cavity; 4. Casting cavity; 5. Sand collection cylinder; 6. Connecting piece; 61. Inner groove; 62. Snap-fit ​​part; 63. Clamping nut. Detailed Implementation

[0027] Preferred embodiments of the present invention will now be described with reference to the accompanying drawings. Those skilled in the art should understand that these embodiments are merely illustrative of the technical principles of the present invention and are not intended to limit the scope of protection of the present invention.

[0028] This utility model proposes a casting sand collapsibility testing device, including a fixed frame 1 and a vibration mechanism 2. The fixed frame 1 is arranged in a "U" shape. The vibration mechanism 2 is installed at the bottom of the fixed frame 1. A detachable mold 3 is arranged above the vibration mechanism 2. The mold 3 includes four cylindrical mold cavities. The four mold cavities are evenly arranged in a horizontal row. The mold cavities are set with open tops and closed bottoms. Casting sand is used to mold cylindrical casting cavities 4 in the mold cavities. The casting cavities 4 are coaxially arranged with the mold cavities.

[0029] A connector 6 is provided at the bottom of the mold cavity. One end of the connector 6 is located inside the mold cavity and extends into the casting cavity 4. The other end of the connector 6 is connected to the vibration mechanism 2, which can drive the connector 6 to vibrate.

[0030] One end of the connector 6 that extends into the casting cavity 4 is provided with an inner groove 61 for better engagement with the casting, and the other end of the connector 6 is provided with an external thread.

[0031] The mold 3 includes two templates 31, which are connected together by bolts. Four semi-circular cavities 311 are provided on the templates 31, and the corresponding semi-circular cavities 311 on the two templates 31 together form a mold cavity.

[0032] Four sand collecting cylinders 5 are provided below the mold 3, and the four sand collecting cylinders 5 are set in the four mold cavities to collect the scattered casting sand. The sand collecting cylinders 5 are set on the vibration mechanism 2, and the connecting piece 6 passes through the sand collecting cylinders 5.

[0033] The vibration mechanism 2 includes a vibrating plate 21, a sand collecting cylinder 5 is disposed on the upper surface of the vibrating plate 21, a connecting piece 6 is disposed through the vibrating plate 21, and three vibration devices 22 are installed on the lower surface of the vibrating plate 21. The vibration devices 22 are vibration motors used to provide mechanical vibration to the vibrating plate. The three vibration devices 22 are electrically connected to a coordinator to ensure that the three vibration devices 22 can vibrate synchronously.

[0034] The two side plates of the fixed frame 1 are vertically provided with sliding grooves 11. The two ends of the vibrating plate 21 are slidably connected to the fixed frame 1 through the sliding grooves 11, thereby guiding the vibration direction of the vibrating plate 21 and limiting the vibration plate 21 to prevent the vibrating plate 21 from deviating during the vibration process.

[0035] The two side plates of the vibrating plate 21 are also provided with snap-fit ​​grooves 12. The snap-fit ​​grooves 12 are located above the slide groove 11. The two ends of the mold 3 extend into the snap-fit ​​grooves 12 and snap-fit ​​with the snap-fit ​​grooves 12 to achieve the limiting function of the mold 3. Both ends of the snap-fit ​​grooves 12 are open so that the two templates 31 can be removed from the snap-fit ​​grooves 12 after casting is completed.

[0036] The side wall of the connector 6 is integrally provided with a snap-fit ​​part 62, which snaps onto the top of the sand collecting cylinder 5. The end of the connector 6 facing away from the casting cavity 4 is threaded with a clamping nut 63. When the clamping nut 63 is tightened, the connector 6, the sand collecting cylinder 5 and the vibrating plate 21 can be fixed together. When the clamping nut 63 is unscrewed, the connector 6 and the sand collecting cylinder 5 can be removed from the vibrating plate 21, making it easier to replace the connector 6 and pour out the casting sand in the sand collecting cylinder 5.

[0037] Testing process: First, casting sand is filled into the mold cavity to form the casting cavity 4. Then, molten alloy is injected into the casting cavity 4. After cooling and solidification, the two templates 31 are separated and removed from both ends of the snap-fit ​​groove 12. Second, the vibration device 22 is activated, and the mechanical vibration generated by the vibration device 22 is transmitted to the connector 6 through the vibration plate 21, thereby vibrating and dispersing the casting sand wrapped around the connector 6. The dispersed casting sand will fall into the corresponding sand collection cylinder 5. Finally, the connector 6 and the casting are disassembled by unscrewing the clamping nut 63, and the casting sand collected in the sand collection cylinder 5 is poured out. The dispersibility of the casting sand is determined based on the amount of casting sand in the sand collection cylinder 5.

[0038] It should be noted that when disassembling connector 6, care should be taken to prevent the undissolved casting sand on connector 6 from falling into sand collection cylinder 5, so as to avoid affecting the test results.

[0039] When testing the same casting sand in four mold cavities, the average value of the four test structures can be recorded as the collapsibility test value of the casting sand, thus making the test results more accurate. If different types of casting sand need to be tested for collapsibility, different types of casting sand can be added to the four mold cavities, allowing for simultaneous testing of the collapsibility of all four types of casting sand. If it is necessary to test the collapsibility of the casting sand when in contact with different alloy liquids, different alloy liquids can be poured into casting cavity 4, thus enabling the testing of changes in the collapsibility of the casting sand when casting with different alloy liquids.

[0040] In summary, by setting up the mold 3 and the vibration mechanism 2, this utility model ensures that the casting sand comes into contact with the molten alloy during the actual casting process, thereby guaranteeing that the stress changes generated inside the sand during testing are the same as those during actual casting, and further making the testing of the collapsibility of the casting sand more accurate. Simultaneously, different types of casting sand can be used to build molds in multiple mold cavities, allowing for simultaneous testing of the collapsibility of various types of casting sand.

[0041] Although the present invention has been described with reference to preferred embodiments, various modifications can be made to it and components can be replaced with equivalents without departing from the scope of the present invention. In particular, the technical features mentioned in the various embodiments can be combined in any manner as long as there is no structural conflict. The present invention is not limited to the specific embodiments disclosed herein, but includes all technical solutions falling within the scope of the claims.

[0042] In the description of this utility model, terms such as "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," which indicate direction or positional relationships, are based on the direction or positional relationships shown in the accompanying drawings. These are used merely for ease of description and do not indicate or imply that the device or element must have a specific orientation, or be constructed and operated in a specific orientation; therefore, they should not be construed as limitations on this utility model. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0043] Furthermore, it should be noted that, in the description of this utility model, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "joining" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0044] The term "comprising" or any other similar term is intended to cover non-exclusive inclusion, such that a process, article, or apparatus / device that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to those processes, articles, or apparatus / devices.

[0045] The technical solution of this utility model has been described in conjunction with the preferred embodiments shown in the accompanying drawings. However, it will be readily understood by those skilled in the art that the protection scope of this utility model is obviously not limited to these specific embodiments. Without departing from the principle of this utility model, those skilled in the art can make equivalent changes or substitutions to the relevant technical features, and the technical solutions after these changes or substitutions will all fall within the protection scope of this utility model.

Claims

1. A device for detecting the collapsibility of foundry sand, characterized in that: It includes a vibration mechanism (2), and a detachable mold (3) is provided above the vibration mechanism (2). The mold (3) includes multiple mold cavities. A casting cavity (4) is formed in the mold cavity by casting sand. A connector (6) is provided at the bottom of the mold cavity. One end of the connector (6) is located in the mold cavity and extends into the casting cavity (4). The other end of the connector (6) extending out of the mold cavity is connected to the vibration mechanism (2).

2. The casting sand collapsibility testing device according to claim 1, characterized in that: The mold (3) also includes two templates (31), which are connected by bolts. Each template (31) has a plurality of semi-circular cavities (311), and the semi-circular cavities (311) on the two templates (31) together form a mold cavity.

3. The casting sand collapsibility testing device according to claim 1, characterized in that: A sand collecting cylinder (5) is provided below the mold (3), the sand collecting cylinder (5) is provided on the vibration mechanism (2), and the connecting piece (6) is provided through the sand collecting cylinder (5).

4. The casting sand collapsibility testing device according to claim 3, characterized in that: The vibration mechanism (2) includes a vibration plate (21), the sand collecting cylinder (5) is disposed on the upper surface of the vibration plate (21), the connecting member (6) is disposed through the vibration plate (21), and a vibration device (22) is disposed on the lower surface of the vibration plate (21) for driving the vibration plate (21) to vibrate.

5. The casting sand collapsibility testing device according to claim 4, characterized in that: It also includes a fixed frame (1), which is set in a "U" shape. The vibration device (22) is installed on the bottom surface of the fixed frame (1), and the two ends of the vibration plate (21) are slidably connected to the two side plates of the fixed frame (1) through the sliding groove (11).

6. The casting sand collapsibility testing device according to claim 5, characterized in that: The two side plates of the fixing frame (1) are provided with snap-fit ​​grooves (12), and the two ends of the mold (3) extend into the snap-fit ​​grooves (12).

7. The casting sand collapsibility testing device according to claim 4, characterized in that: The connector (6) has an integrally formed snap-fit ​​part (62) on its upper cover. The snap-fit ​​part (62) snaps onto the top of the sand collecting cylinder (5). The end of the connector (6) facing away from the casting cavity (4) is threaded with a clamping nut (63) to fix the connector (6) and the sand collecting cylinder (5).

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