A coated sand melting point testing device

Abstract

This utility model relates to the field of coated sand testing technology, and discloses a coated sand melting point testing device, including a base and side plates. Two side plates are fixed parallel to each other on the upper sides of the base. Insulation plates are rotatably mounted on the inner sides of both side plates via rotating rods. Four heat-resistant plates are evenly connected and fixed to the outer ring between the heat-resistant plates. Each heat-resistant plate has an inner cavity, inside which a high-temperature heating wire is installed. A horizontal plate is fixed above the side plates, and a non-contact high-temperature probe is mounted on the surface of the horizontal plate. This utility model's technical solution, by setting multiple heat-resistant plates, each with a heating structure and a heating groove, allows coated sand to be laid for melting point testing when the heat-resistant plate is placed on top. After the test, the heat-resistant plate is rotated to the side, facilitating the discharge of coated sand from the heating groove and allowing for easy brushing to remove melted and adhered coated sand from the heating groove.

Description

Technical Field

[0001] This utility model relates to the field of coated sand testing technology, specifically a coated sand melting point testing device. Background Technology

[0002] Coated sand is molding sand or core sand whose surface is coated with a solid resin film before molding. There are two coating processes: cold method and hot method. In the cold method, the resin is dissolved in ethanol and hexamethylenetetramine is added during the sand mixing process so that the two are coated on the surface of the sand grains. The ethanol evaporates to obtain coated sand. In the hot method, the sand is preheated to a certain temperature, resin is added to melt it, and the mixture is stirred to coat the surface of the sand grains with resin. Hexamethylenetetramine aqueous solution and lubricant are added, and the mixture is cooled, crushed, and screened to obtain coated sand, which is used for cast steel parts and cast iron parts.

[0003] To ensure that coated sand meets the requirements for sand mold making, its melting point needs to be tested. This is done by spreading a layer of coated sand and heating it to test the melting point. However, after the test, the coated sand, especially the melted and sticky sand, is inconvenient to clean. Therefore, we propose a device for testing the melting point of coated sand. Utility Model Content

[0004] The purpose of this invention is to provide a melting point testing device for coated sand. By setting up multiple heat-resistant plates, each heat-resistant plate is equipped with a heating structure and a heating tank. When the heat-resistant plate is placed on top, coated sand can be laid to conduct melting point testing. After the test is completed, the heat-resistant plate is rotated to the side, which can easily discharge the coated sand in the heating tank. At the same time, it can be easily brushed to clean the melted coated sand that has adhered to the heating tank, thus solving the problems mentioned in the background art.

[0005] To achieve the above objectives, this utility model provides the following technical solution: a film-coated sand melting point testing device, comprising a base and side plates. Two side plates are fixedly mounted on the upper sides of the base in parallel arrangement. Insulation plates are rotatably mounted on the inner sides of both side plates via rotating rods. The insulation plates on both sides are of the same height, and four heat-resistant plates are uniformly connected and fixed to the outer ring between the insulation plates. Each heat-resistant plate has an inner cavity, and a high-temperature heating wire is installed inside the inner cavity. A horizontal plate is fixed horizontally above the side plates, and a non-contact high-temperature probe is mounted on the surface of the horizontal plate.

[0006] By adopting the above technical solution, the surface of the heat-resistant plate at the top is covered with coated sand, which is heated by a high-temperature electric heating wire. The melting point of the coated sand is tested by detecting the temperature with a high-temperature probe. After the test, the heat-resistant plate can be rotated to the side to facilitate cleaning of the coated sand and brushing to remove the melted and adhered coated sand.

[0007] Optionally, the heat-resistant plates are arranged in a non-contact manner, and the heat-resistant plates are of the same size.

[0008] By adopting the above technical solution, during the high-temperature heating test inside the uppermost heat-resistant plate, excessive heat will not be transferred to the heat-resistant plate located on the side for cleaning.

[0009] Optionally, the heat-resistant plate has a heating groove on its surface, and the heating groove is located on the outer side of the heat-resistant plate.

[0010] By adopting the above technical solution, a layer of coated sand can be conveniently and quickly laid in the heating tank for testing.

[0011] Optionally, the high-temperature probe extends below the horizontal plate, with the high-temperature probe positioned above the middle of the heat-resistant plate below it.

[0012] By adopting the above technical solution, a high-temperature probe can be used to accurately monitor the temperature by pointing it directly upwards.

[0013] Optionally, a stepper motor is installed on the outer surface of the side plate at the end of the rotating rod on one side of the heat-resistant plate, and the stepper motor is connected to the rotating rod in a transmission connection.

[0014] By adopting the above technical solution, a stepper motor is used to drive the rotation and lock the heat insulation plate and the heat-resistant plate.

[0015] Optionally, an electric slip ring is installed on the rotating rod on the side away from the stepper motor, so that the high-temperature heating wire can be kept connected to the power supply line and control equipment during rotation through the electric slip ring.

[0016] By adopting the above technical solution, during the rotation of the heat-resistant plate, the electric slip ring can ensure the normal connection between the high-temperature electric furnace wire and the power supply line and control equipment.

[0017] Compared with the prior art, the beneficial effects of the technical solution of this application are as follows:

[0018] 1. The technical solution of this application is provided with multiple heat-resistant plates, each of which is equipped with a heating structure and a heating tank. When the heat-resistant plate is placed on top, coated sand can be laid to conduct melting point tests. After the test is completed, the heat-resistant plate is rotated to the side, which can facilitate the discharge of the coated sand in the heating tank. At the same time, it can be easily brushed to clean the coated sand that has melted and adhered to the heating tank.

[0019] 2. The technical solution of this application has multiple heat-resistant plates. When the heat-resistant plate that has been tested is rotated to the side for cleaning, the melting point test of the coated sand can continue to be carried out on the surface of the top heat-resistant plate to obtain multiple sets of data. Attached Figure Description

[0020] Other features, objects, and advantages of this invention will become more apparent from the following detailed description of non-limiting embodiments with reference to the accompanying drawings:

[0021] Figure 1 This is a schematic diagram of the overall structure of the coating sand melting point testing device of this utility model;

[0022] Figure 2 This is a schematic diagram of the heat-resistant plate cross-section structure of the coating sand melting point testing device of this utility model.

[0023] In the diagram: 1. Base; 2. Side plate; 21. Rotating rod; 211. Heat insulation plate; 22. Stepper motor; 3. Heat-resistant plate; 31. Heating tank; 32. Inner cavity; 321. High-temperature heating wire; 4. Horizontal plate; 41. High-temperature probe. Detailed Implementation

[0024] Please see Figure 1-2 This utility model provides a technical solution: a film sand melting point testing device, including a base 1 and side plates 2. Two side plates 2 are provided and fixed on the upper sides of the base 1 in parallel with each other. Both side plates 2 are perpendicular to the upper surface of the base 1 and the side plates 2 on both sides are the same size. The inner side of both side plates 2 is rotatably mounted with heat insulation plates 211 through rotating rods 21. The heat insulation plates 211 on both sides are set with the same height and size.

[0025] Four heat-resistant plates 3 are evenly connected and fixed on the outer ring between the heat insulation plates 211 on both sides. Each pair of adjacent heat-resistant plates 3 are arranged perpendicularly to each other. Each heat-resistant plate 3 has an inner cavity 32, and a high-temperature electric heating wire 321 is installed inside the inner cavity 32. A heating groove 31 is opened on the surface of the heat-resistant plate 3. The heating groove 31 is located on the side of the heat-resistant plate 3 facing outward. The coated sand to be tested can be evenly spread on the inner surface of the heating groove 31. After the high-temperature electric heating wire 321 is turned on, the coated sand in the heating groove 31 can be heated and tested. The material of the heat-resistant plate 3 can be heat-resistant materials such as high-temperature graphite and ceramic.

[0026] A horizontal plate 4 is fixed above the side plates 2. A non-contact high temperature probe 41 is installed on the surface of the horizontal plate 4. The probe of the high temperature probe 41 extends to the bottom of the horizontal plate 4 and is located above the middle position of the heat-resistant plate 3 below it. During the heating process, the heating temperature is monitored in real time, and the state of the coated sand is observed to achieve the test of the melting point.

[0027] A stepper motor 22 is installed on the outer surface of the side plate 2 at the end of the right rotating rod 21. The stepper motor 22 is connected to the rotating rod 21 for transmission, so that after the melting point test of the coated sand is completed, the stepper motor 22 can be used to drive the heat-resistant plate 3 to the side vertical position, which can facilitate the cleaning of the coated sand. The melted and adhered coated sand can be brushed out with the help of tools. During this process, the coated sand can continue to be laid in the heating groove 31 on the surface of the heat-resistant plate 3 above to continue the melting point test, thereby obtaining multiple sets of data. The non-contact setting of the heat-resistant plates 3 and the fact that the heat-resistant plates 3 are the same size can ensure that when the heat-resistant plate 3 is rotated to the side for cleaning, when the heat-resistant plate 3 above is heated, its heat will not be transferred too much to the heat-resistant plate 3 on the side, so as not to affect the cleaning work.

[0028] An electric slip ring is installed on the left rotating rod 21. The power supply end of the high-temperature heating wire 321 is connected to the rotating end of the electric slip ring (the wire is not shown in the figure), while the fixed end of the electric slip ring is connected to the control equipment and the power supply equipment through the wire. Thus, the electric slip ring achieves the purpose of maintaining connection with the power supply line and the control equipment during rotation.

[0029] In use, the high-temperature heating wires 321 in the inner cavities 32 of different heat-resistant plates 3 maintain the connection between the heat-resistant plates 3 and the control equipment and power supply lines while rotating through the electric slip rings installed on the outer ring of the rotating rod 21. The high-temperature probe 41 and the stepper motor 22 are also connected to the control equipment. During testing, the coated sand to be tested is evenly spread in the heating groove 31 on the surface of the uppermost heat-resistant plate 3. The high-temperature heating wires 321 located below the heat-resistant plate 3 are activated to heat the sand. During heating, the heating of the coated sand is measured non-contactly using the high-temperature probe 41. Temperature is measured, and the melting point of the coated sand is determined by observation. After the test is completed, the heating of the high-temperature electric heating wire 321 is stopped. Then, the stepper motor 22 can be started to drive the heat insulation plate 211 to rotate all the heat-resistant plates 3 by 90 degrees, thereby rotating the heat-resistant plate 3 that was originally located at the top to the side, so that the coated sand in the heating tank 31 can be discharged. It is also convenient to use tools to scrape off the coated sand that has become stuck after melting. During the cleaning process, new coated sand can also be laid in the heating tank 31 on the surface of the top heat-resistant plate 3 to continue the test and obtain multiple sets of test data.

Claims

1. A device for testing the melting point of coated sand, comprising a base (1) and a side plate (2), characterized in that: The side plates (2) are provided in two parallel positions and fixed on the upper sides of the base (1). The inner sides of the two side plates (2) are rotatably equipped with heat insulation plates (211) via rotating rods (21). The heat insulation plates (211) on both sides are at the same height, and four heat-resistant plates (3) are evenly connected and fixed on the outer ring between the heat insulation plates (211). Each heat-resistant plate (3) has an inner cavity (32) inside, and a high-temperature electric heating wire (321) is installed inside the inner cavity (32). A heating groove (31) is opened on the surface of the heat-resistant plate (3). The heating groove (31) is located on the side of the heat-resistant plate (3) facing outward. The heating groove (31) is filled with coated sand. A horizontal plate (4) is fixed above the side plates (2), and a non-contact high temperature probe (41) is installed on the surface of the horizontal plate (4).

2. The membrane sand melting point testing device according to claim 1, characterized in that: The heat-resistant plates (3) are arranged in a non-contact manner, and the heat-resistant plates (3) are the same size.

3. The membrane sand melting point testing device according to claim 1, characterized in that: The high temperature probe (41) extends to the bottom of the horizontal plate (4), and the high temperature probe (41) is located above the middle position of the heat-resistant plate (3) below it.

4. The membrane sand melting point testing device according to claim 1, characterized in that: A stepper motor (22) is installed on the outer surface of the side plate (2) at the end of the rotating rod (21) on one side of the heat-resistant plate (3), and the stepper motor (22) is connected to the rotating rod (21) in a transmission connection.

5. The membrane sand melting point testing device according to claim 4, characterized in that: An electric slip ring is installed on the rotating rod (21) on the side away from the stepper motor (22). The high-temperature heating wire (321) is kept connected to the power supply line and control equipment during rotation through the electric slip ring.

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