A casting auxiliary device and auxiliary method for low-temperature material fluidity experiment

Abstract

This invention relates to a pouring auxiliary device and method for low-temperature material flowability experiments. The bottom end of a supporting spindle is fixed to an experimental platform via a locking mechanism. The supporting spindle can be raised and lowered vertically relative to the experimental platform. Two supporting arms are installed at the top of the supporting spindle, each capable of extension, retraction, and bending. A water temperature chamber is installed at the end of each supporting arm furthest from the supporting spindle. An internal channel is installed in the middle of the water temperature chamber's cavity, and a heating wire is fitted onto the outer wall of the internal channel. The heating wire generates heat to continuously maintain the temperature of the liquid inside the water temperature chamber. The end of the internal channel at the bottom of the water temperature chamber is connected to a lower pipe via a ring-shaped pipe. An integrated electric-manual valve is installed on the lower pipe. A servo motor is activated to automatically control the pouring fluid injection rate, and the manual valve is activated in emergency situations. This invention features an integrated structural design that enables controllable pouring temperature, while also facilitating recycling and cleaning.

Description

Technical Field

[0001] This invention relates to a casting auxiliary device and method for experiments on the fluidity of low-temperature materials, belonging to the technical field of teaching experimental instruments and equipment for investment casting. Background Technology

[0002] Casting is one of the fundamental processes in modern basic machinery manufacturing. Fluidity is one of the casting properties of an alloy, directly affecting its ability to fill the mold. Alloys with better fluidity have stronger filling capabilities, enabling the casting of thin-walled, complex parts with clear outlines. They also facilitate the flotation and removal of inclusions and gases, as well as the shrinkage during solidification. Conversely, alloys with poor fluidity struggle to fill the mold cavity, resulting in poor filling ability and a higher risk of defects such as incomplete filling, cold shuts, porosity, and slag inclusions.

[0003] Among casting methods, investment casting technology has significant advantages. Also known as precision casting or lost-wax casting, it involves creating a precise fusible model using fusible materials (such as wax). Several layers of refractory coating are applied to the model, which is then dried and hardened into a single shell. The wax is then melted away in the shell, followed by high-temperature firing to create a refractory shell. Liquid metal is poured into this refractory shell, and after cooling, the casting is complete. With technological advancements, investment casting technology has grown significantly, resulting in a wide variety of molding materials with diverse compositions. These materials are typically categorized by their melting point into high-temperature, medium-temperature, and low-temperature molding materials. Low-temperature molding materials have a melting point of approximately 60°C, and paraffin-stearic acid mixtures are widely used in my country. In practical teaching at universities, fluidity measurement experiments are often conducted to demonstrate the investment casting process to students. These experiments are performed using fluidity measurement teaching devices.

[0004] For example, patent application ZL202122095388.6 designed a material flow experiment device based on a spiral flow channel, including a basic platform, an experimental device, and a mold system. It solved problems such as uneven wax flow speed, mold body temperature fluctuations due to environmental factors, and low experimental repeatability. However, during the experimental pouring process, we found that it used a common funnel-shaped pouring cup, while the pouring liquid (wax at 65℃ and 75℃) cooled quickly, causing different temperatures as it flowed into the funnel-shaped pouring cup, making it impossible to conduct the experiment at the designed pouring liquid temperature. Patent application ZL2020211815083 designed a pouring cup composed of two pouring cup plates, solving the problem of difficult cleaning of the pouring cup in traditional experimental devices. However, after pouring, a cylindrical solid residue remains in this type of pouring cup, making it inconvenient to recycle the pouring liquid and resulting in waste of experimental materials.

[0005] Therefore, in order to solve the above problems, it is urgent to design a brand-new casting method to realize a test device with controllable temperature and easy recycling and cleaning. Summary of the Invention

[0006] This invention provides a casting auxiliary device and method for low-temperature material flowability experiments, which solves problems such as unstable flow rate and temperature loss of the casting liquid material caused by artificial casting process during casting experiments. The integrated structural design enables controllable casting temperature, and the structure is easy to recycle and clean.

[0007] The technical solution adopted by this invention to solve its technical problem is:

[0008] A casting auxiliary device for low-temperature material flowability experiments includes a casting support, which includes a supporting main shaft, a locking part, and a supporting arm. The bottom end of the supporting main shaft is fixed to the experimental platform by the locking part.

[0009] With the center of the locking part as the origin, define the long side parallel to the experimental platform as the X-axis, the short side parallel to the experimental platform as the Y-axis, and the direction of the main support axis as the Z-axis to establish a three-dimensional coordinate system.

[0010] The main support shaft can be raised and lowered relative to the experimental platform in the Z-axis direction. Two support arms are installed at the top of the main support shaft. Each support arm can extend, retract and bend. Both support arms are parallel to the X0Y plane formed by the X-axis and Y-axis. One support arm extends in the plane formed by the positive X-axis and positive Y-axis, and the other support arm extends in the plane formed by the positive X-axis and negative Y-axis.

[0011] Each support arm is equipped with a water temperature box at the end away from the main support shaft. An internal channel for injecting the casting liquid is installed in the middle of the inner cavity of the water temperature box. The outer wall of the internal channel is fitted with a water temperature box heating wire. The heating wire heats up to keep the liquid in the water temperature box continuously warm. The end of the internal channel at the bottom of the water temperature box is connected to the lower pipe through a ring pipe. The bottom end of the lower pipe faces the casting mold. An electric-manual integrated valve is installed on the lower pipe.

[0012] The servo motor of the electric-manual integrated valve is activated to automatically control the injection flow rate of the pouring liquid. In case of emergency, the manual valve of the electric-manual integrated valve is activated.

[0013] As a further preferred embodiment of the present invention, the support arm includes a first support rod, a second support rod, and two third support rods. The first support rod is hollow inside, and one end of the second support rod extends into the hollow interior of the first support rod. The second support rod is slidably connected to the first support rod. Locking bolts are installed at the adjacent ends of the first and second support rods. The second support rod slides relative to the first support rod to change the extension length of the support arm. When the extension length of the support arm meets the preset working conditions, the locking bolts fix the second support rod and the first support rod.

[0014] The other end of the second support rod is rotatably connected to one end of a third support rod via a fixed shaft, that is, the second support rod and the third support rod can form a bending angle. The other end of the third support rod is also equipped with a locking bolt. One end of the other third support rod extends into the other end of the third support rod, and the other third support rod slides relative to the first third support rod to change the extension length of the support arm. When the extension length of the support arm meets the preset working conditions, the locking bolt fixes the two third support rods.

[0015] The other end of the third support rod is fitted with a clamp, which is fixed to the water temperature tank.

[0016] As a further preferred embodiment of the present invention, the locking part includes a locking device, a locking shaft, and a support base. The locking device is arranged in a U-shape. One horizontal part of the opening of the U-shape fits against the surface of the experimental platform. The bottom end of the supporting spindle passes through one horizontal part of the U-shape and is fixed to the support base. The other horizontal part of the U-shape passes through the locking shaft. A suction cup is provided at the end of the locking shaft located in the opening of the U-shape, and the suction cup is adsorbed onto the bottom surface of the experimental platform.

[0017] As a further preferred embodiment of the present invention, the support spindle is hollow inside, the support inner core is embedded inside the support spindle, and the support inner core is slidably connected to the support spindle. The support inner core slides relative to the support spindle to realize the change of the height of the support arm in the Z-axis direction. When the height of the support arm meets the preset working conditions, the telescopic rod locking device fixes the support inner core to the support spindle.

[0018] As a further preferred embodiment of the present invention, the water temperature box includes a water temperature box body and a water temperature box upper part, the internal channel is located at the center of the water temperature box body, a temperature detection sensor is installed inside the water temperature box body, and a first annular groove is formed at the opening of the water temperature box body.

[0019] A through groove is opened at the center of the upper part of the water temperature tank. The circumference of the through groove protrudes outward to form a boss. The surface of the boss is covered with the water temperature tank cover. A second annular groove is opened at the lower edge of the upper part of the water temperature tank facing the opening of the water temperature tank body. When the upper part of the water temperature tank is covered at the opening of the water temperature tank body, a space for placing a sealing ring is formed between the first annular groove and the second annular groove.

[0020] The upper part of the water temperature tank also has water inlet and outlet holes, water temperature tank heating wire outlet hole, and temperature detection circuit outlet hole. The end of the water temperature tank heating wire extending from the water temperature tank heating wire outlet hole is connected to one circuit hole end of the electronic temperature controller; the end of the temperature detection sensor circuit extending from the temperature detection circuit outlet hole is connected to the other circuit hole end of the electronic temperature controller.

[0021] The water temperature tank body is made of a three-layer structure. Its inner cavity is made of copper sheet, and a glass fiber and resin composite material is bonded to the outside of the copper sheet. SUS304 stainless steel material is laid on the outside of the glass fiber and resin composite material.

[0022] As a further preferred embodiment of the present invention, the electric-manual integrated valve includes a lower end of the valve body and an upper end of the valve body. The whole formed by connecting the upper end of the valve body and the lower end of the valve body is located on the Z-axis. A valve core is embedded in the inner cavity of the lower end of the valve body. Extension ends are respectively provided at symmetrical positions on the outer wall of the lower end of the valve body. The outer wall of the end of the extension end is provided with threads.

[0023] One end of the electric valve stem extends into one of the extension ends and is fixed to the valve core. One end of the electric valve core shaft extends from the other end of the electric valve stem and is embedded in the electric valve stem. The other end of the electric valve core shaft is fixed to the motor shaft of the servo motor.

[0024] One end of the manual valve stem of the valve body extends into another extension end and is fixed to the valve core; a manual valve stem cap is installed at the other end of the manual valve stem of the valve body.

[0025] As a further preferred embodiment of the present invention, a manual valve stem sleeve is provided outside the manual valve stem of the valve body, and the manual valve stem sleeve is threadedly connected to the manual valve stem of the valve body.

[0026] The servo motor housing is fitted over the servo motor, and the opening of the servo motor housing is threadedly connected to the end of an extension.

[0027] The upper end and lower end of the valve body are fixed by fastening bolts, and valve core sealing rings are respectively installed between the valve core and the upper end of the valve body, and between the valve core and the lower end of the valve body;

[0028] As a further preferred embodiment of the present invention, a spiral heating belt is wound around the outside of the lower pipe, and a zipper-type heat insulation cotton is provided on the outside of the heating belt. A heating belt circuit outlet hole and a temperature detection sensor outlet hole are provided on the heat insulation cotton.

[0029] The heating band circuit's outlet end is connected to one circuit hole of the electronic temperature controller; the temperature sensor circuit's outlet end is connected to the other circuit hole of the electronic temperature controller.

[0030] The insulation cotton includes a high-temperature resistant insulating silicone pad, glass fiber insulation cotton, and aluminum foil. The high-temperature resistant insulating silicone pad is attached to the outer wall of the lower pipe, and glass fiber insulation cotton is placed on the outside of the high-temperature resistant insulating silicone pad. The glass fiber insulation cotton is wrapped with aluminum foil.

[0031] The auxiliary method using the aforementioned casting auxiliary device for low-temperature material flowability experiments specifically includes the following steps:

[0032] Step S1: Adjust the position of the inner core of the support relative to the main shaft of the support, and adjust the height of the support arm in the Z-axis direction to the preset height; adjust the support arm in the plane formed by the positive direction of the X-axis and the positive direction of the Y-axis and the support arm in the plane formed by the positive direction of the X-axis and the negative direction of the Y-axis respectively, and adjust the water temperature box fixed at the end of the support arm to match the casting mold, while ensuring that the height of the two support arms in the Z-axis is consistent.

[0033] Step S2: Define the water temperature tank located in the plane formed by the positive X-axis and the positive Y-axis as water temperature tank No. 1, and the water temperature tank located in the plane formed by the positive X-axis and the negative Y-axis as water temperature tank No. 2. Introduce heat transfer medium into water temperature tank No. 1 and water temperature tank No. 2. Preset the temperatures of water temperature tank No. 1, the lower pipe matched with water temperature tank No. 1, water temperature tank No. 2, and the lower pipe matched with water temperature tank No. 2. The temperature detection sensor provides real-time feedback to the electronic temperature controller until the temperature of the pouring auxiliary device approaches the preset temperature.

[0034] Step S3: Simultaneously open the water temperature tank cover on water temperature tank 1 and water temperature tank 2, pour the melted low temperature casting liquid into the internal channel of water temperature tank 1 and water temperature tank 2, close the water temperature tank cover, and let it stand for a preset time.

[0035] Step S4: Start the servo motor and open the electric-manual integrated valve. The casting liquid will be automatically poured into the casting mold. If any abnormality is found during the pouring process, manually close the electric-manual integrated valve to stop the pouring.

[0036] Step S5: After the pouring liquid stops flowing, reverse the servo motor and close the electric-manual integrated valve. At this time, rotate the pouring bracket and open the electric-manual integrated valve again to pour the remaining pouring liquid in the water temperature tank into the recovery liquid.

[0037] Step S6: Continue rotating the pouring support to ensure that the electric-manual integrated valve is closed. Pour cleaning agent into the internal channel. After cleaning, manually open the electric-manual integrated valve to drain the cleaning agent.

[0038] Step S7: Turn off the heating wire in the water temperature chamber and the heating belt in the lower pipe in the water tank, cool down the pouring auxiliary device, close the electric-manual integrated valve, and the pouring process is completed;

[0039] Step S8: Observe the molds after pouring low-temperature fluidity material into water temperature tanks No. 1 and No. 2, and investigate the effect of temperature on the fluidity of the pouring liquid;

[0040] As a further preferred embodiment of the present invention, the rotation angle range of the first support rod relative to the support main shaft is 0-180°, and it rotates from the positive X-axis direction to the positive Y-axis direction or the negative Y-axis direction respectively.

[0041] The rotation angle range between the second support rod and the adjacent third support rod is 0-180°;

[0042] The combined telescopic length of the first and second support rods is half the length of the entire support arm; the combined telescopic length of the two third support rods is half the length of the entire support arm.

[0043] The radius of rotation of each support arm is three times the length of the first support rod.

[0044] By employing the above technical solutions, the present invention has the following beneficial effects compared to the prior art:

[0045] 1. The casting auxiliary device for low-temperature material flowability experiments provided by the present invention is an integrated structure and adopts a dual casting auxiliary mode, which can perform two sets of casting simultaneously, thereby improving casting efficiency.

[0046] 2. The casting auxiliary device for low-temperature material flowability experiments provided by the present invention automatically and stably controls the flow rate of liquid material during the casting process through an electric-manual integrated valve. It can be manually stopped when abnormal conditions occur during the experiment, thus achieving good repeatability of the experiment.

[0047] 3. The casting auxiliary device for low-temperature material flowability experiments provided by the present invention, through the setting of a water temperature tank, keeps the remaining casting liquid in a heat-preserving state after casting is completed, while the liquid state is easy to recover and clean. Attached Figure Description

[0048] The present invention will be further described below with reference to the accompanying drawings and embodiments.

[0049] Figure 1 This is a full view of a preferred embodiment provided by the present invention;

[0050] Figure 2 This is a top view of a preferred embodiment provided by the present invention;

[0051] Figure 3 This is a side view of a preferred embodiment provided by the present invention;

[0052] Figure 4 This is an exploded schematic diagram of the water temperature tank in a preferred embodiment of the present invention;

[0053] Figure 5 This is a schematic diagram of the water temperature tank body structure in a preferred embodiment of the present invention;

[0054] Figure 6 This is a cross-sectional view of the water temperature tank body in a preferred embodiment of the present invention;

[0055] Figure 7This is a schematic diagram of the upper structure of the water temperature tank in a preferred embodiment of the present invention;

[0056] Figure 8 This is a full view of the casting support in a preferred embodiment of the present invention;

[0057] Figure 9 This is a front view of the casting support in a preferred embodiment of the present invention;

[0058] Figure 10 This is a full view of the locking portion in a preferred embodiment of the present invention;

[0059] Figure 11 This is a schematic diagram of the support arm in a preferred embodiment of the present invention;

[0060] Figure 12 This is a full view of the electric-manual integrated valve in a preferred embodiment of the present invention;

[0061] Figure 13 This is an exploded view of the electric-manual integrated valve in a preferred embodiment of the present invention;

[0062] Figure 14 This is a cross-sectional view of the electric-manual integrated valve in a preferred embodiment of the present invention;

[0063] Figure 15 This is an installation view of the lower pipe and water temperature tank in a preferred embodiment provided by the present invention;

[0064] Figure 16 This is a full view of the lower pipe in a preferred embodiment provided by the present invention;

[0065] Figure 17 This is an installation view of the heating belt and the electric-manual integrated valve in a preferred embodiment of the present invention.

[0066] In the diagram: 1 is the water temperature tank, 11 is the water temperature tank body, 111 is the internal channel, 112 is the first annular groove, 113 is the annular pipe, 12 is the upper part of the water temperature tank, 121 is the second annular groove, 122 is the outlet hole for the heating wire of the water temperature tank, 123 is the outlet hole for the temperature detection circuit, 124 is the water inlet and outlet holes, 13 is the water temperature tank cover, 14 is the sealing ring, 15 is the heating wire of the water temperature tank, 2 is the casting bracket, 201 is the bracket base, 202 is the locking device, 203 is the locking shaft, 204 is the telescopic rod locking device, 205 is the support spindle, 206 is the first support rod, 207 is the second support rod, 208 is the third support rod, 20... 9 is the fixed shaft, 210 is the clamping head, 211 is the locking bolt, 3 is the electric-manual integrated valve, 301 is the lower end of the valve body, 302 is the upper end of the valve body, 303 is the manual valve stem of the valve body, 304 is the electric valve stem, 305 is the servo motor housing, 306 is the valve core, 307 is the manual valve stem cap, 308 is the servo motor, 309 is the manual valve stem sleeve, 310 is the valve core sealing ring, 311 is the electric valve core shaft, 312 is the fastening bolt, 4 is the lower pipe, 41 is the insulation cotton, 411 is the zipper type, 412 is the heating belt circuit outlet hole, 413 is the temperature detection sensor outlet hole, 5 is the electronic temperature controller, and 6 is the experimental platform. Implementation

[0067] The present invention will now be described in further detail with reference to the accompanying drawings. In the description of this application, it should be understood that the terms "left side," "right side," "upper part," "lower part," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. "First," "second," etc., do not indicate the importance of the components, and therefore should not be construed as a limitation of the present invention. The specific dimensions used in this embodiment are only for illustrating the technical solution and do not limit the scope of protection of the present invention.

[0068] As described in the background section, for flowability experiments on low-temperature materials, which are waxes used as casting liquids at 65°C and 75°C, the cooling rate of the casting liquid is often uncontrollable when using the funnel-shaped pouring cup commonly used in existing technologies. Furthermore, the pouring speed is also uncontrollable due to the manual pouring method, resulting in significant deviations in the experimental data and further affecting the analysis of the experimental results. In addition, since the temperature of the casting liquid cannot be guaranteed, it will change from a liquid to a solid state and adhere to the wall of the pouring cup, making it extremely difficult to clean.

[0069] For the reasons mentioned above, this application provides a casting auxiliary device for cryogenic material flowability experiments. It uses an integrated electric-manual valve 3 to achieve stable control of the liquid material flow rate during casting, avoiding the adverse effects of manual casting and improving experimental repeatability. Another highlight of the integrated electric-manual valve in this application is its ability to manually open and close the valve, thereby achieving manual flow control as an emergency aid. Regarding the temperature control of the self-insulating box for the cast liquid material, precise temperature control is achieved through water bath heat conduction, which is highly beneficial for the temperature balance of cryogenic materials and avoids overheating or overcooling.

[0070] Specific examples Figures 1-3 The diagram shown is an overall configuration of the device provided in this application, including a casting support 2, which includes a supporting main shaft 205, a locking part, and a supporting arm. The bottom end of the supporting main shaft is fixed to the experimental platform 6 through the locking part. For ease of description, this application defines the long side parallel to the experimental platform as the X-axis, the short side parallel to the experimental platform as the Y-axis, and the direction of the supporting main shaft as the Z-axis, with the center of the locking part as the origin. A three-dimensional coordinate system is established.

[0071] The supporting spindle can be raised and lowered relative to the experimental platform in the Z-axis direction. Two supporting arms are installed at the top of the supporting spindle. Each supporting arm can extend, retract, and bend. Both supporting arms are parallel to the X0Y plane formed by the X and Y axes. One supporting arm extends in the plane formed by the positive X-axis and positive Y-axis, and the other supporting arm extends in the plane formed by the positive X-axis and negative Y-axis. The supporting spindle, combined with the supporting arms, enables the entire device to switch positions in the vertical and horizontal directions, and adjusts in real time to meet the pouring conditions.

[0072] Each support arm is equipped with a water temperature tank 1 at its end furthest from the main support shaft. An internal channel 111 for injecting the casting liquid is installed in the middle of the water temperature tank cavity. A water temperature tank heating wire 15 is fitted on the outer wall of the internal channel. The heating wire heats up the water temperature tank to keep the liquid inside the tank continuously warm. The water bath conducts heat, precisely creating a warming environment for the pouring cup and achieving temperature control. The end of the internal channel at the bottom of the water temperature tank is connected to the lower pipe through a ring pipe 113. The bottom end of the lower pipe faces the casting mold. An electric-manual integrated valve is installed on the lower pipe. The biggest highlight of this application is the design of this valve. Since low-temperature fluid materials (paraffin and stearic acid) will solidify at room temperature of 25°C, using a traditional electric valve may first cause cooling during the pouring process, resulting in damage to the valve body. Secondly, it cannot stop in time when pouring abnormalities occur. This application activates the servo motor 308 of the electric-manual integrated valve to automatically control the injection flow rate of the casting liquid. In case of emergency, the manual valve of the electric-manual integrated valve is activated, achieving two goals at once.

[0073] The design of two support arms allows for simultaneous casting of two sets of molds, reducing manpower consumption during the casting process and facilitating the entire process. During the casting of the two sets of molds, different temperatures for low-temperature fluidity materials are set for comparative experiments to explore the impact of temperature on the fluidity of the matched low-temperature materials, thereby improving the scientific rigor of fluidity experiment teaching. Of course, corresponding experiments were also conducted on the force balance aspect using two support arms to seek optimal experimental results. Using a single-section arm with a degree of freedom would not meet the installation requirements and the space needed for the experimental steps; using three or more sections of arm freedom would increase stress concentration in the casting support, potentially leading to breakage.

[0074] Next, we will describe each part of the device in detail, starting with the support arm. Figure 8 , Figure 9 and Figure 11 As shown, it includes a first support rod 206, a second support rod 207, and two third support rods 208. The first support rod is hollow inside, and one end of the second support rod extends into the hollow interior of the first support rod, with the second support rod slidably connected to the first support rod. Locking bolts 211 are installed at adjacent ends of the first and second support rods. The sliding of the second support rod relative to the first support rod changes the extension length of the support arm. When the extension length of the support arm meets a preset working condition, the locking bolts fix the second support rod to the first support rod. The other end of the second support rod is connected to a... One end of the third support rod is rotatably connected via a fixed shaft 209, meaning that a bending angle can be formed between the second support rod and one third support rod. The other end of one third support rod is also fitted with a locking bolt. One end of another third support rod extends into the other end of one third support rod, and the other third support rod slides relative to one third support rod to change the extension length of the support arm. When the extension length of the support arm meets the preset working conditions, the locking bolt fixes the two third support rods. The other end of the other third support rod is fitted with a clamping head 210, which is fixed to the water temperature tank.

[0075] Figure 10 As shown, the locking part includes a locking device 202, a locking shaft 203, and a support base 201. The locking device is U-shaped, with one horizontal portion of the U-shaped opening fitting against the surface of the experimental platform. The bottom end of the supporting spindle passes through one horizontal portion of the U-shaped structure and is fixed to the support base. The locking shaft passes through the other horizontal portion of the U-shaped structure. A suction cup is provided at the end of the locking shaft located within the opening of the U-shaped structure, and the suction cup is attached to the bottom surface of the experimental platform. The bottom surface of the support base and the casting mold are both based on the experimental platform. After installation with the water temperature chamber, they are positioned parallel to the plane of the experimental platform to ensure that the gravitational potential energy of the casting liquid is within a stable range.

[0076] The vertical lifting of the device mainly relies on the support spindle. The support spindle is hollow inside, and the support inner core is embedded in the support spindle. The support inner core is slidably connected to the support spindle. The sliding of the support inner core relative to the support spindle realizes the change of the height of the support arm in the Z-axis direction. When the height of the support arm meets the preset working conditions, the telescopic rod locking device 204 fixes the support inner core to the support spindle.

[0077] Figures 4-6 As shown, the water temperature chamber includes a chamber body 11 and an upper part 12. An internal channel is located at the center of the chamber body, and a heating wire is fitted onto the outer wall of the internal channel. The heating element is made of nickel-chromium alloy. A temperature sensor is installed inside the chamber body. A first annular groove 112 is formed at the opening of the chamber body. A through groove is formed at the center of the upper part of the chamber, with a boss protruding outwards from the circumference of the groove opening. A chamber cover 13 is placed on the surface of the boss. A second annular groove 121 is formed at the lower edge of the upper part of the chamber facing the opening of the chamber body. When the upper part of the chamber covers the chamber body... At the opening, a space is formed between the first and second annular grooves for placing the sealing ring 14. The sealing ring is an O-ring made of high-temperature resistant silicone, ensuring the complete sealing of the entire water temperature tank. The upper part of the water temperature tank also has inlet / outlet holes 124, a heating wire outlet hole 122, and a temperature detection circuit outlet hole 123. The end of the heating wire extending from the heating wire outlet hole is connected to one circuit hole of the electronic temperature controller 5; the end of the temperature sensor circuit extending from the temperature detection circuit outlet hole is connected to the other circuit hole of the electronic temperature controller. When the water temperature tank is in operation, water enters through the inlet / outlet holes and is heated by the heating wire inside the tank. Once the specified temperature is reached, the upper temperature sensor inside the tank transmits the signal to the electronic temperature controller. Upon receiving the signal, the electronic temperature controller switches the power supply on and off to the heating wire, achieving dynamic temperature control.

[0078] Of course, the water temperature tank itself also needs to have a good heat preservation effect. Therefore, the tank body is made of a three-layer structure. Its inner cavity is made of copper sheet to transfer heat. Glass fiber and resin composite material is attached to the outside of the copper sheet for heat insulation and insulation. SUS304 stainless steel material is laid on the outside of the glass fiber and resin composite material for outer shell protection.

[0079] The focus of this application is Figures 12-14The electric-manual integrated valve shown includes a lower valve body 301 and an upper valve body 302. The upper and lower valve bodies are connected to form an integral structure located on the Z-axis. A valve core 306 is embedded in the inner cavity of the lower valve body. Extension ends are symmetrically positioned on the outer wall of the lower valve body, and the outer wall of the extension ends is threaded. One end of the electric valve stem 304 extends into one of the extension ends and is fixed to the valve core. One end of the electric valve core shaft 311 extends into the other end of the electric valve stem and is embedded in the electric valve stem. The other end of the electric valve core shaft is fixed to the motor shaft of the servo motor. One end of the manual valve stem 303 extends into the other extension end and is fixed to the valve core. A manual valve stem cap 307 is installed on the other end of the manual valve stem. A manual valve stem sleeve 309 is fitted over the manual valve stem of the valve body, and the manual valve stem sleeve is threadedly connected to the manual valve stem of the valve body. A servo motor housing 305 is fitted over the servo motor, and the opening of the servo motor housing is threadedly connected to an extension end. The upper and lower ends of the valve body are fixed by fastening bolts 312, and valve core sealing rings 310 are respectively installed between the valve core and the upper and lower ends of the valve body. The valve core is made of ceramic, which is resistant to high temperatures and corrosion. The valve core sealing rings are made of fluororubber.

[0080] Figure 17 As shown, a spiral heating belt is wound around the outside of the lower pipe, and the heating belt is covered with a protective cover. Figure 16 The zippered insulation 411 shown is thermal insulation 41. Figure 15 As shown, a heating element circuit outlet hole 412 and a temperature sensor outlet hole 413 are provided on the insulation cotton. The end of the heating element circuit extending from the outlet hole is connected to one circuit hole of the electronic temperature controller; the end of the temperature sensor circuit extending from the outlet hole is connected to the other circuit hole of the electronic temperature controller. Matching the dynamic temperature control of the aforementioned water tank, the heating element here enables dynamic temperature adjustment by connecting the internal channels, the annular pipe, and the lower pipe. The electronic temperature controller preferably uses a PID digital display temperature controller with a control range of 0℃-100℃, a control accuracy of 0.1℃, and a power supply voltage of AC 85-265V. The control method uses a linear current switching mechanism.

[0081] The insulation material includes a high-temperature resistant insulating silicone pad, fiberglass insulation material, and aluminum foil. The high-temperature resistant insulating silicone pad is attached to the outer wall of the lower pipe for insulation and also has an insulating function. Fiberglass insulation material is placed outside the high-temperature resistant insulating silicone pad, and aluminum foil is wrapped around the fiberglass insulation material to lock in the temperature. The insulation measures on the outside of the electric-manual integrated valve are used in conjunction with the water temperature tank to form a closed-loop temperature control, preventing cooling.

[0082] After the temperature inside the water incubator stabilizes, the experimenters introduce the pouring solution into the internal pipes and close the incubator lid. Under the gravitational potential energy of the pouring solution, the pouring process is achieved via an electric-manual integrated valve. The flow rate can be adjusted electrically as the valve is rotated open and closed. Once pouring is complete, the flow of the pouring solution is stopped using the electric / manual valve. The pouring support is then raised to a suitable position via the lifting platform, and the manual valve is opened to allow the remaining pouring solution to flow into an insulated cup inside the incubator. During cleaning, simply pour the cleaning agent into the water incubator and drain it through the manual valve. Because the temperature inside the incubator is high, the pouring solution will not cool to a solid state; any remaining pouring solution will flow into the waste container with the cleaning agent, making cleaning convenient and reducing subsequent cleaning time.

[0083] Finally, this application provides an auxiliary method for using the aforementioned casting auxiliary device for low-temperature material flowability testing. In a preferred embodiment, a set of 500 mL of 65°C low-temperature flowability material (paraffin and stearic acid in a 1:1 ratio) and 500 mL of 75°C low-temperature flowability material (paraffin and stearic acid in a 1:1 ratio) are selected for a comparative experiment, specifically including the following steps:

[0084] Step S1: Adjust the position of the inner core of the support relative to the main shaft of the support, and adjust the height of the support arm in the Z-axis direction to the preset height; adjust the support arm in the plane formed by the positive X-axis and the positive Y-axis and the support arm in the plane formed by the positive X-axis and the negative Y-axis respectively, and adjust the water temperature box fixed at the end of the support arm to match the casting mold, while ensuring that the height of the two support arms in the Z-axis is consistent and that their gravitational potential energy is the same;

[0085] Step S2: Define the water temperature tank located in the plane formed by the positive direction of the X-axis and the positive direction of the Y-axis as water temperature tank No. 1, and the water temperature tank located in the plane formed by the positive direction of the X-axis and the negative direction of the Y-axis as water temperature tank No. 2. Introduce heat transfer medium into water temperature tank No. 1 and water temperature tank No. 2; preset the temperature of water temperature tank No. 1 and the lower pipe matched with water temperature tank No. 1 to 75℃, and the temperature of water temperature tank No. 2 and the lower pipe matched with water temperature tank No. 2 to 65℃. The temperature detection sensor provides real-time feedback to the electronic temperature controller until the temperature of the pouring auxiliary device approaches the preset temperature of 75±0.1℃.

[0086] Step S3: Simultaneously open the water temperature tank cover on water temperature tank 1 and water temperature tank 2, pour the melted low temperature casting liquid into the internal channel of water temperature tank 1 and water temperature tank 2, close the water temperature tank cover, and let it stand for a preset time.

[0087] Step S4: Start the servo motor and open the electric-manual integrated valve. The casting liquid will be automatically poured into the casting mold. If any abnormality is found during the pouring process, manually close the electric-manual integrated valve to stop the pouring.

[0088] Step S5: After the pouring liquid stops flowing, reverse the servo motor and close the electric-manual integrated valve. At this time, rotate the pouring bracket and open the electric-manual integrated valve again to pour the remaining pouring liquid in the water temperature tank into the recovery liquid.

[0089] Step S6: Continue to rotate the pouring support to ensure that the electric-manual integrated valve is closed. Pour the cleaning agent into the internal channel. After cleaning, manually open the electric-manual integrated valve to drain the cleaning agent. Because the internal temperature of water tanks No. 1 and No. 2 is high, the temperature of the pouring liquid is higher than its freezing point. The pouring liquid will not cool into a solid. The residual pouring liquid will flow into the waste liquid bucket with the cleaning agent.

[0090] Step S7: Turn off the heating wire of the water temperature box in the water tank and the heating belt in the lower pipe 4, cool down the pouring auxiliary device, close the electric-manual integrated valve, and the pouring process is completed;

[0091] Step S8: Observe the molds after pouring low-temperature fluidity material into water temperature tanks No. 1 and No. 2, and investigate the effect of temperature on the fluidity of the pouring liquid.

[0092] Of course, the rotation of the aforementioned support arms and main support shaft is controllable. The degrees of freedom of the two support arms should be on the same plane. The rotation angle range of the first support rod relative to the main support shaft is 0-180°, and it rotates from the positive X-axis direction to either the positive Y-axis direction or the negative Y-axis direction. The rotation angle range between the second support rod and the adjacent third support rod is 0-180°. The combined extension length of the first and second support rods is half the length of the entire support arm. The combined extension length of the two third support rods is half the length of the entire support arm. The rotation radius of each support arm is three times the length of the first support rod to meet the rotation space required for the previous experimental steps.

[0093] In summary, this application optimizes and improves the pouring mode of a material flowability experimental device based on a spiral flow channel. It uses water bath heating to precisely create a heat preservation environment for the pouring cup, achieving temperature control while facilitating subsequent recycling and cleaning of the pouring liquid. At the same time, the device uses an electric-manual integrated valve to control the flow rate, avoiding the influence of manual pouring speed on experimental data. It adopts an innovative double-arm structure for the pouring support, which can pour two sets of molds simultaneously, while reducing the subsequent cleaning time of the device, further improving the scientific nature of flowability experimental teaching.

[0094] Those skilled in the art will understand that, unless otherwise defined, all terms used herein (including technical and scientific terms) have the same meaning as commonly understood by one of ordinary skill in the art to which this application pertains. It should also be understood that terms such as those defined in general dictionaries should be understood to have the same meaning as in the context of the prior art, and should not be interpreted in an idealized or overly formal sense unless defined as herein.

[0095] The meaning of "and / or" as used in this application includes situations where each exists alone or both exist simultaneously.

[0096] The term "connection" as used in this application can mean a direct connection between components or an indirect connection between components through other components.

[0097] Based on the above-described preferred embodiments of the present invention, and through the foregoing description, those skilled in the art can make various changes and modifications without departing from the inventive concept. The technical scope of this invention is not limited to the contents of the specification, but must be determined according to the scope of the claims.

Claims

1. A casting auxiliary device for low-temperature material flowability experiments, characterized in that: It includes a casting support, which includes a supporting spindle, a locking part, and a supporting arm. The bottom end of the supporting spindle is fixed to the experimental platform by the locking part. With the center of the locking part as the origin, define the long side parallel to the experimental platform as the X-axis, the short side parallel to the experimental platform as the Y-axis, and the direction of the main support axis as the Z-axis to establish a three-dimensional coordinate system. The main support shaft can be raised and lowered relative to the experimental platform in the Z-axis direction. Two support arms are installed at the top of the main support shaft. Each support arm can extend, retract and bend. Both support arms are parallel to the X0Y plane formed by the X-axis and Y-axis. One support arm extends in the plane formed by the positive X-axis and positive Y-axis, and the other support arm extends in the plane formed by the positive X-axis and negative Y-axis. Each support arm is equipped with a water temperature box at the end away from the main support shaft. An internal channel for injecting the casting liquid is installed in the middle of the inner cavity of the water temperature box. The outer wall of the internal channel is fitted with a water temperature box heating wire. The heating wire heats up to keep the liquid in the water temperature box continuously warm. The end of the internal channel at the bottom of the water temperature box is connected to the lower pipe through a ring pipe. The bottom end of the lower pipe faces the casting mold. An electric-manual integrated valve is installed on the lower pipe. The servo motor of the electric-manual integrated valve is activated to automatically control the injection flow rate of the pouring fluid. In case of emergency, the manual valve of the electric-manual integrated valve is activated.

2. The casting auxiliary device for low-temperature material flowability experiments according to claim 1, characterized in that: The support arm includes a first support rod, a second support rod, and two third support rods. The first support rod is hollow inside, and one end of the second support rod extends into the hollow interior of the first support rod. The second support rod is slidably connected to the first support rod. Locking bolts are installed at the adjacent ends of the first and second support rods. The second support rod slides relative to the first support rod to change the extension length of the support arm. When the extension length of the support arm meets the preset working conditions, the locking bolts fix the second support rod to the first support rod. The other end of the second support rod is rotatably connected to one end of a third support rod via a fixed shaft, that is, the second support rod and the third support rod can form a bending angle. The other end of the third support rod is also equipped with a locking bolt. One end of the other third support rod extends into the other end of the third support rod, and the other third support rod slides relative to the first third support rod to change the extension length of the support arm. When the extension length of the support arm meets the preset working conditions, the locking bolt fixes the two third support rods. A clamping head is installed at the other end of the third support rod, and the clamping head is fixed to the water temperature tank.

3. The casting auxiliary device for low-temperature material flowability experiments according to claim 2, characterized in that: The locking part includes a locking device, a locking shaft, and a support base. The locking device is U-shaped. One horizontal part of the opening of the U-shaped structure is attached to the surface of the experimental platform. The bottom end of the supporting spindle is fixed to the support base by passing through one horizontal part of the U-shaped structure. The locking shaft passes through the other horizontal part of the U-shaped structure. A suction cup is provided at the end of the locking shaft located in the opening of the U-shaped structure. The suction cup is attached to the bottom surface of the experimental platform.

4. The casting auxiliary device for low-temperature material flowability experiments according to claim 3, characterized in that: The support spindle is hollow inside, and the support inner core is embedded inside the support spindle. The support inner core is slidably connected to the support spindle. The sliding of the support inner core relative to the support spindle realizes the change of the height of the support arm in the Z-axis direction. When the height of the support arm meets the preset working conditions, the telescopic rod locking device fixes the support inner core to the support spindle.

5. The casting auxiliary device for low-temperature material flowability experiments according to claim 4, characterized in that: The water temperature tank includes a water temperature tank body and a water temperature tank upper part. The internal channel is located in the center of the water temperature tank body. A temperature detection sensor is installed inside the water temperature tank body. The opening of the water temperature tank body has a first annular groove. A through groove is opened at the center of the upper part of the water temperature tank. The circumference of the through groove protrudes outward to form a boss. The surface of the boss is covered with the water temperature tank cover. A second annular groove is opened at the lower edge of the upper part of the water temperature tank facing the opening of the water temperature tank body. When the upper part of the water temperature tank is covered at the opening of the water temperature tank body, a space for placing a sealing ring is formed between the first annular groove and the second annular groove. The upper part of the water temperature tank also has water inlet and outlet holes, water temperature tank heating wire outlet hole, and temperature detection circuit outlet hole. The end of the water temperature tank heating wire extending from the water temperature tank heating wire outlet hole is connected to one circuit hole end of the electronic temperature controller; the end of the temperature detection sensor circuit extending from the temperature detection circuit outlet hole is connected to the other circuit hole end of the electronic temperature controller. The water temperature tank body is made of a three-layer structure. Its inner cavity is made of copper sheet, and a glass fiber and resin composite material is bonded to the outside of the copper sheet. SUS304 stainless steel material is laid on the outside of the glass fiber and resin composite material.

6. The casting auxiliary device for low-temperature material flowability experiments according to claim 5, characterized in that: The electric-manual integrated valve includes a lower end of the valve body and an upper end of the valve body. The upper end of the valve body and the lower end of the valve body are connected to form an integral part located on the Z-axis. A valve core is embedded in the inner cavity of the lower end of the valve body. Extension ends are respectively provided at symmetrical positions on the outer wall of the lower end of the valve body. The outer wall of the end of the extension end is provided with threads. One end of the electric valve stem extends into one of the extension ends and is fixed to the valve core. One end of the electric valve core shaft extends from the other end of the electric valve stem and is embedded in the electric valve stem. The other end of the electric valve core shaft is fixed to the motor shaft of the servo motor. One end of the manual valve stem extends into another extension end and is fixed to the valve core, while a manual valve stem cap is installed at the other end of the manual valve stem.

7. The casting auxiliary device for low-temperature material flowability experiments according to claim 6, characterized in that: A manual valve stem sleeve is fitted over the outside of the manual valve stem of the valve body, and the manual valve stem sleeve is threadedly connected to the manual valve stem of the valve body. The servo motor housing is fitted over the servo motor, and the opening of the servo motor housing is threadedly connected to the end of an extension. The upper and lower ends of the valve body are fixed together by fastening bolts, and valve core sealing rings are respectively installed between the valve core and the upper end of the valve body, and between the valve core and the lower end of the valve body.

8. The casting auxiliary device for low-temperature material flowability experiments according to claim 7, characterized in that: A spiral heating belt is wrapped around the outside of the lower pipe, and the heating belt is covered with zipper-type insulation cotton. The heating belt circuit outlet hole and the temperature detection sensor outlet hole are opened on the insulation cotton. The heating band circuit's outlet end is connected to one circuit hole of the electronic temperature controller; the temperature sensor circuit's outlet end is connected to the other circuit hole of the electronic temperature controller. The insulation material includes a high-temperature resistant insulating silicone pad, fiberglass insulation material, and aluminum foil. The high-temperature resistant insulating silicone pad is attached to the outer wall of the lower pipe, and fiberglass insulation material is placed on the outside of the high-temperature resistant insulating silicone pad. The fiberglass insulation material is wrapped with aluminum foil.

9. An auxiliary method using the casting auxiliary device for low-temperature material flowability experiments as described in claim 8, characterized in that: Specifically, the following steps are included: Step S1: Adjust the position of the inner core of the support relative to the main shaft of the support, and adjust the height of the support arm in the Z-axis direction to the preset height; Adjust the support arm in the plane formed by the positive X-axis and positive Y-axis and the support arm in the plane formed by the positive X-axis and negative Y-axis respectively, and adjust the water temperature box fixed at the end of the support arm to match the casting mold, while ensuring that the height of the two support arms on the Z-axis is consistent. Step S2: Define the water temperature tank located in the plane formed by the positive X-axis and the positive Y-axis as water temperature tank No. 1, and the water temperature tank located in the plane formed by the positive X-axis and the negative Y-axis as water temperature tank No.

2. Introduce heat transfer medium into water temperature tank No. 1 and water temperature tank No.

2. Preset the temperatures of water temperature tank No. 1, the lower pipe matched with water temperature tank No. 1, water temperature tank No. 2, and the lower pipe matched with water temperature tank No.

2. The temperature detection sensor provides real-time feedback to the electronic temperature controller until the temperature of the pouring auxiliary device approaches the preset temperature. Step S3: Simultaneously open the water temperature tank cover on water temperature tank 1 and water temperature tank 2, pour the melted low temperature casting liquid into the internal channel of water temperature tank 1 and water temperature tank 2, close the water temperature tank cover, and let it stand for a preset time. Step S4: Start the servo motor and open the electric-manual integrated valve. The casting liquid will be automatically poured into the casting mold. If any abnormality is found during the pouring process, manually close the electric-manual integrated valve to stop the pouring. Step S5: After the pouring liquid stops flowing, reverse the servo motor and close the electric-manual integrated valve. At this time, rotate the pouring bracket and open the electric-manual integrated valve again to pour the remaining pouring liquid in the water temperature tank into the recovery liquid. Step S6: Continue rotating the pouring support to ensure that the electric-manual integrated valve is closed. Pour cleaning agent into the internal channel. After cleaning, manually open the electric-manual integrated valve to drain the cleaning agent. Step S7: Turn off the heating wire in the water temperature chamber and the heating belt in the lower pipe in the water tank, cool down the pouring auxiliary device, close the electric-manual integrated valve, and the pouring process is completed; Step S8: Observe the molds after pouring low-temperature fluidity material into water temperature tanks No. 1 and No. 2, and investigate the effect of temperature on the fluidity of the pouring liquid.

10. The auxiliary method for the casting auxiliary device for low-temperature material flowability experiments according to claim 9, characterized in that: The first support rod rotates within a range of 0-180° relative to the main support shaft, and rotates from the positive X-axis direction to either the positive Y-axis direction or the negative Y-axis direction. The rotation angle range between the second support rod and the adjacent third support rod is 0-180°; The combined telescopic length of the first and second support rods is half the length of the entire support arm; the combined telescopic length of the two third support rods is half the length of the entire support arm. The radius of rotation of each support arm is three times the length of the first support rod.

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