Protective atmosphere spray forming equipment and nodulizer alloy particle forming method

Abstract

The invention discloses protective atmosphere spray forming equipment and a spheroidizing agent alloy particle forming method, and relates to the technical field of spray forming equipment, the protective atmosphere spray forming equipment comprises a box body and a crucible, a cooling cavity is formed in the box body, the crucible is located at the top of the box body, the bottom of the crucible is connected with a communicating pipe extending into the cooling cavity, and the communicating pipe is communicated with the cooling cavity. And the bottom of the outer wall of the communicating pipe is rotationally connected with a rotary spray head. According to the protective atmosphere spray forming equipment and the spheroidizing agent alloy particle forming method, the spheroidizing agent alloy particles prepared through a centrifugal method can greatly reduce structure and component segregation of the spheroidizing agent alloy particles, and the quality of a prepared spheroidizing agent is improved; and meanwhile, an argon protective atmosphere exists in the whole forming process, magnesium in the nodulizer alloy is prevented from being oxidized, the magnesium oxide content of a final nodulizer particle product is smaller than 0.5%, and the function of the nodulizer can be played to the maximum extent.

Description

Technical Field

[0001] The invention relates to the technical field of spray molding equipment, and more specifically to a protective atmosphere spray molding equipment and a spheroidizing agent alloy particle molding method. Background Art

[0002] Spheroidizing agent is an additive used to obtain spheroidal graphite cast iron. It is mainly used for spheroidizing treatment in the smelting process. By adding it into the molten iron, it helps the graphite in the cast iron to crystallize into spheres, thereby improving the mechanical properties of the metal material, such as improving ductility, strength and toughness. The main component of "spheroidizing agent" is spheroidizing elements, such as Mg, Ce, Ca, etc. The spheroidal graphite in ductile cast iron is formed by spheroidizing the molten iron.

[0003] The spheroidizing agent alloy needs to be added to the molten iron with a suitable particle size and shape to ensure that it can react quickly with the molten iron after entering the molten iron. The traditional spheroidizing agent processing method is to use a crusher to crush the cooled and solidified large piece of alloy, and then screen it. However, this method of producing spheroidizing agents still has the following problems: 1. The liquid alloy ingot mold will be oxidized during the cooling process, and the oxidized spheroidizing agent will reduce the use effect; 2. The spheroidizing agent particles obtained by crushing are usually irregular in shape, which will affect its dissolution and dispersion in the molten metal, thereby affecting the spheroidizing effect; 3. A large amount of dust will be generated during the crushing process, which will pollute the environment and pose a threat to the health of the operators. Additional dust removal and safety measures are required, and the scattered dust will cause the loss of raw materials, resulting in a decrease in the utilization rate of raw materials; 4. The crushing and screening process is time-consuming and energy-intensive, especially for hard metal materials, which require higher-level crushing equipment, which will increase production costs. At the same time, the equipment is severely worn and requires regular maintenance and replacement of parts, which increases production costs.

[0004] Although the injection molding method can be used to produce spheroidizers, such as the Chinese patent with application number 202121163804.5, which discloses an injection molding device, the structure includes an insulated crucible with a guide tube at the bottom and a sealing cover at the top; a feeding mechanism connected to the insulated crucible for feeding the insulated crucible; an atomizer connected to the end of the guide tube; and a deposition chamber arranged at the outlet end of the atomizer; a deposition tray is provided in the deposition chamber, a discharge channel is provided at the bottom of the deposition chamber, and a vacuum tube is connected to the deposition chamber. The injection molding device can eject the molten metal in the crucible by spraying, and the ejected molten metal forms a sphere due to the effect of surface tension, which can be used to produce granular spheroidizers, but there are still the following problems:

[0005] 1. There is a lack of a structure that can receive the spheroidizer after forming. When the ejected metal particles are not completely cooled, they will be deformed after falling on the conveyor belt. The deformed spheroidizer will reduce the surface area, thus affecting the effect of the spheroidizer;

[0006] 2. The temperature needs to be slowly lowered during the spheroidizing process. Too fast a temperature drop will cause a temperature difference between the inside and outside of the alloy particles, which will lead to the formation of cracks, especially in the stress concentration area of ​​the material.

[0007] 3. The metal liquid ejected with the airflow will break into metal particles. Due to the change in trajectory, it will move and deviate, resulting in a large falling area, which increases uncontrollable factors.

[0008] Therefore, it is necessary to propose a protective atmosphere spray molding equipment and a spheroidizing agent alloy particle molding method to solve the above problems. Summary of the invention

[0009] In view of the above situation, in order to overcome the defects of the prior art, the present invention provides a protective atmosphere spray molding equipment and a spheroidizing agent alloy particle molding method to solve the problems raised in the above background technology.

[0010] The technical solution is that the present invention comprises a box and a crucible, wherein a cooling cavity is arranged inside the box, and the crucible is located at the top of the box, and is characterized in that: a connecting pipe extending into the cooling cavity is connected to the bottom of the crucible, a rotating nozzle is rotatably connected to the bottom of the outer wall of the connecting pipe, a cavity located at the bottom of the connecting pipe is opened inside the rotating nozzle, a liquid outlet pipe extending from the rotating nozzle is opened at the bottom of the cavity, and the liquid outlet pipe is bent downward;

[0011] A driving device is installed on the top of the box, and the output end of the driving device is connected to the top of the rotating nozzle through a chain transmission assembly. An atomizer is provided at the bottom of the rotating nozzle, and the atomizer is fixed to the top of the cooling chamber through a bracket. The bottom of the atomizer is provided with an annular atomizing nozzle arranged obliquely toward the axis of the connecting pipe;

[0012] A water tank is arranged at the bottom of the cooling chamber, the water tank is filled with coolant, a cooling component is arranged at the top of the water tank, a water supply pipe is connected between the water tank and the atomizer, a water pump is connected to the top of the water supply pipe, and a filtering device is connected to the bottom of the water supply pipe.

[0013] Furthermore, the cooling assembly includes a support frame and a plurality of cooling rings fixed on the support frame, a heat exchange device is connected to the outer wall of the box body, the heat exchange device is sleeved on the water supply pipe, the heat exchange device includes a sleeve and a spiral plate located in the sleeve, the top chamber in the sleeve is connected to the cooling ring at the bottom through a pipe, the middle chamber of the sleeve is connected to the cooling ring in the middle through a pipe, the bottom chamber of the sleeve is connected to the cooling ring at the top through a pipe, and the airflow nozzle at the bottom of the cooling ring is arranged toward the axis of the connecting pipe;

[0014] The top of the sleeve is connected with an air inlet pipe, the air inlet pipe is connected with an external low-temperature inert gas supply device, and the water pump is connected to the top of the sleeve.

[0015] Furthermore, one end of the water trough extends out of the box body, a conveyor belt device is placed in the water trough, a material carrying end of the conveyor belt device is located outside the box body, and one end of the water trough outside the box body is connected to a discharging device.

[0016] Furthermore, an annular guide plate is arranged on the inner wall of the water tank, the bottom of the guide plate is arranged toward the conveyor belt device, a symmetrical slide rail is arranged on the inner wall of the water tank, a cover plate is connected to the slide rail for sliding up and down, a floating plate is connected to the bottom of the cover plate, the floating plate floats on the water surface, brushes in contact with the inner wall of the water tank are arranged on both sides of the cover plate, and the brushes prevent the internal airflow from escaping;

[0017] A baffle for blocking water waves is connected to the inner wall of the water tank, and the baffle is deeply inserted into the cooling liquid.

[0018] Furthermore, the filtering device includes a fixed seat and a filter net, the interior of the fixed seat is provided with a coaxially arranged filter chamber and a sliding chamber, the sliding chamber is provided with a delivery pipe extending into the filter chamber, the other end of the delivery pipe extends into the water tank, a water outlet hole is provided on the outer wall of one end of the delivery pipe located in the filter chamber, a movable pipe is slidably connected to the outer wall of the delivery pipe, and both ends of the movable pipe are respectively located in the sliding chamber and the filter chamber.

[0019] Furthermore, a spring is connected between one end of the movable tube located in the sliding cavity and the side wall of the sliding cavity, one end of the movable tube located in the filter cavity is provided with a positioning boss and an arc plate fixed on the edge, the filter screen is sleeved on the boss, a slide groove for the movement of the arc plate is provided on the top of the filter cavity, an installation cover is connected to one end of the filter screen away from the movable tube, an internal thread is provided at one end of the filter cavity away from the sliding cavity, and an external thread installed on the filter cavity is provided on the outer ring surface of the installation cover.

[0020] Furthermore, the discharging device includes a bar frame, which is fixed on the outer wall of the water tank, and the interior of the bar frame is connected with a receiving plate and a discharge plate located at the bottom of the guide plate, the receiving plate and the discharge plate are arranged at an angle, the bottom of the receiving plate is arranged toward the top of the discharge plate, and a guide groove is arranged inside the discharge plate.

[0021] Furthermore, the bottom of the box is connected to an air outlet pipe, and the bottom of the box is connected to a base.

[0022] A method for forming spheroidizing agent alloy particles, using the injection molding equipment of claim 8, comprising the following steps:

[0023] S1. Adding materials: Start the driving device and the water pump to pour the molten metal into the crucible. The driving device drives the rotating nozzle to rotate and throws the molten metal out by centrifugal force.

[0024] S2, primary forming: The water pump supplies the coolant in the water tank to the atomizer. The water flow sprayed by the atomizer impacts the molten metal, breaking it into particles and changing its trajectory to move it downward;

[0025] S3, cooling: The low-temperature inert gas from the outside is introduced into the casing through the air inlet pipe. The low-temperature inert gas cools the internal water supply pipe. At the same time, part of the gas enters the cooling ring through the pipe. The inert gas is sprayed from the cooling ring to cool the falling granular metal and prevent oxidation. The lower the temperature of the gas sprayed from the cooling ring, the lower the temperature is, which plays a role of gradual cooling.

[0026] S4, cooling and molding: the metal particles finally fall into the water tank for final cooling, the conveyor belt device lifts the formed spheroidizer and transports it to the discharging device, and the finished spheroidizer is transported out through the discharging device.

[0027] Compared with the existing known technologies, the technical solution provided by the present invention has the following significant effects:

[0028] 1. The device is provided with a rotating nozzle on the connecting pipe, which can throw out the molten metal in the crucible, thereby improving the production efficiency. The spheroidizing agent alloy particles prepared by the centrifugal method can greatly reduce the organization and component segregation of the spheroidizing agent alloy particles, thereby improving the quality of the spheroidizing agent. At the same time, the proportion of hollow steel shots can be reduced, thereby improving the quality of the spheroidizing agent. The round spheroidizing agent alloy particles have the largest surface area, thereby maximizing the effect of the spheroidizing agent.

[0029] 2. This device sets multiple groups of cooling rings on the falling path of the metal particles. The sprayed argon gas can gradually cool the metal particles, avoiding a large temperature difference between the inside and outside of the spheroidizer and reducing the cracking of the spheroidizer. At the same time, the argon protective atmosphere can prevent the spheroidizer alloy particles from contacting with the air, avoiding magnesium oxidation, and finally forming a finished product with a spheroidizer particle magnesium oxide content of less than 0.5%.

[0030] 3. This device is equipped with a casing with a cooling function on the water supply pipe, which can cool the coolant flowing through the water supply pipe through low-temperature inert gas, so that the coolant can play a preliminary cooling role on the molten metal after being sprayed from the atomizer, thereby reducing the temperature of the coolant and improving the cooling effect.

[0031] 4. This device can intercept metal particles moving with the water flow in the coolant by arranging a filtering device on the water supply pipe, so as to avoid the situation that the metal particles clog the atomizing nozzle. At the same time, when cleaning the filter, the coolant pipes on both sides can be blocked to avoid the waste of coolant. It not only improves the quality of the coolant, but also facilitates cleaning. BRIEF DESCRIPTION OF THE DRAWINGS

[0032] Figure 1 It is a schematic diagram of the structure of the present invention;

[0033] Figure 2 It is a cross-sectional schematic diagram of the structure of the present invention;

[0034] Figure 3 It is a schematic diagram of the structure of the rotating spray head and the driving device in the present invention;

[0035] Figure 4 It is a schematic diagram of the structure of the water tank and the discharging device in the present invention;

[0036] Figure 5 It is a schematic diagram of the cooling ring and sleeve structure in the present invention;

[0037] Figure 6 is a schematic diagram of the filtering device in the present invention;

[0038] Figure 7 It is a schematic diagram of the connecting pipe and the rotating nozzle structure in the present invention;

[0039] Figure 8 It is a schematic diagram of the discharging device in the present invention.

[0040] Reference numerals:

[0041] 101, box; 102, crucible; 103, cooling chamber; 104, connecting pipe; 105, rotating nozzle; 106, cavity; 107, liquid outlet pipe; 108, driving device; 109, chain transmission assembly; 110, atomizer; 111, water tank; 112, water supply pipe; 113, water pump; 114, filtering device; 115, support frame; 116, cooling ring; 117, sleeve; 118, spiral plate; 119, air inlet pipe; 120, conveyor belt device ; 121. discharging device; 122. guide plate; 123. cover plate; 124. floating plate; 125. slide rail; 126. baffle; 127. fixed seat; 128. filter screen; 129. filter chamber; 130. sliding chamber; 131. conveying pipe; 132. moving pipe; 133. spring; 134. boss; 135. arc plate; 136. mounting cover; 137. bar frame; 138. receiving plate; 139. discharge plate; 140. air flow outlet pipe; 141. base. DETAILED DESCRIPTION

[0042] In order to make the purpose, technical scheme and advantages of the present invention more clearly understood, the present invention is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not used to limit the present invention, that is, the embodiments described are only part of the embodiments of the present invention, rather than all of the embodiments. The components of the embodiments of the present invention described and shown in the drawings herein can be arranged and designed in various different configurations.

[0043] Depend on Figures 1 to 8 The invention comprises a box body 101 and a crucible 102. The crucible 102 is used to store molten metal. A cooling chamber 103 is arranged inside the box body 101. The low-temperature inert gas sprayed by the cooling ring 116 will fill the entire cooling chamber 103. The inert gas can protect the spheroidizing agent alloy particles and prevent the magnesium therein from being oxidized. The warm inert gas is preferably argon. A cooling chamber 103 is arranged inside the box body 101. The crucible 102 is located at the top of the box body 101. The bottom of the crucible 102 is connected to a connecting pipe 104 extending into the cooling chamber 103. The connecting pipe 104 is used to transfer the molten metal in the crucible 102 to the cooling chamber 103. The liquid metal in the rotating nozzle 105 is transported to the rotating nozzle 105. The bottom of the outer wall of the connecting pipe 104 is rotatably connected to the rotating nozzle 105. The bottom edge of the rotating nozzle 105 is provided with a liquid outlet pipe 107 extending to the outside. When the rotating nozzle 105 rotates, the liquid metal in the inside is thrown out through the liquid outlet pipe 107. The inside of the rotating nozzle 105 is provided with a cavity 106 located at the bottom of the connecting pipe 104. The bottom of the cavity 106 is provided with a liquid outlet pipe 107 extending from the rotating nozzle 105. The liquid metal in the cavity 106 can be moved out through the liquid outlet pipe 107. The liquid outlet pipe 107 is bent downward.

[0044] When the molten metal enters the cooling chamber 103 through the connecting pipe 104, the molten metal flows too slowly and it is not convenient to adjust the flow rate of the molten metal. The following provides a structure for controlling the flow rate of the molten metal: Figure 3 and Figure 7 A driving device 108 is installed on the top of the box 101. The output end of the driving device 108 is connected to the top of the rotating nozzle 105 through a chain transmission component 109. The driving device 108 drives the rotating nozzle 105 to rotate through the chain transmission component 109, so that the internal molten metal is subjected to the centrifugal force and is thrown out. By controlling the speed of the driving device 108, the production speed of the spheroidizing agent is increased. The spheroidizing agent alloy particles prepared by the centrifugal method can greatly reduce the organization and component segregation of the spheroidizing agent alloy particles, thereby improving the quality of the spheroidizing agent;

[0045] The following provides a structure that can impact the molten metal so that the molten metal is dispersed into metal particles: Figure 3 The bottom of the rotating nozzle 105 is provided with an atomizer 110, which is connected to the water tank 111 through a water supply pipe 112 and is used to spray the coolant in the water tank 111. The atomizer 110 is fixed to the top of the cooling chamber 103 through a bracket. The bottom of the atomizer 110 is provided with an annular atomizing nozzle arranged obliquely toward the axis of the connecting pipe 104. The coolant sprayed by the atomizing nozzle can impact the spun-out molten metal to form fine metal particles, and at the same time can change the direction of its movement to move downward. The impacted molten metal forms a sphere due to the surface tension. The sphere has the largest surface area, and the uniform distribution of the alloy components is promoted by the action of centrifugal force, thereby improving the microstructure and chemical composition consistency of the alloy particles. Because of the action of centrifugal force, the situation of hollow steel shots is reduced;

[0046] refer to Figure 2 and Figure 4 A water tank 111 is provided at the bottom of the cooling chamber 103, and the water tank 111 is filled with coolant. The coolant in the water tank 111 is the last cooling step. The formed spheroidizer will fall into the water tank 111 after being cooled by multiple groups of cooling rings 116. A cooling component is provided on the top of the water tank 111. A water supply pipe 112 is connected between the water tank 111 and the atomizer 110. A water pump 113 is connected to the top of the water supply pipe 112. The water supply pipe 112 is used to transport the coolant in the water tank 111 to the atomizer 110. A filter device 114 is connected to the bottom of the water supply pipe 112. The filter device 114 can intercept particles that are too small in the coolant.

[0047] Specifically, refer to Figure 4 and Figure 5The cooling assembly includes a support frame 115 and a plurality of cooling rings 116 fixed on the support frame 115. The support frame 115 is used to support the plurality of cooling rings 116. The cooling ring 116 is annular. The impacted molten metal and coolant will pass through the middle hole of the cooling ring 116. The nozzle at the bottom of the cooling ring 116 is set toward the passing molten metal. The ejected low-temperature inert gas can cool the passing metal particles. A heat exchange device is connected to the outer wall of the box body 101. The heat exchange device is sleeved on the water supply pipe 112. The heat exchange device includes a sleeve 117 and a spiral plate 118 located in the sleeve 117. The low-temperature inert gas entering the sleeve 117 The spiral plate 118 moves downward along the spiral shape, and can cool the water supply pipe 112 from top to bottom. The top chamber in the sleeve 117 is connected to the cooling ring 116 at the bottom through a pipe, the middle chamber of the sleeve 117 is connected to the cooling ring 116 at the middle through a pipe, and the bottom chamber of the sleeve 117 is connected to the cooling ring 116 at the top through a pipe. The air flow nozzle at the bottom of the cooling ring 116 is arranged toward the axis of the connecting pipe 104. When the low-temperature inert gas flows in the sleeve 117, a part of the gas will move to the cooling ring 116 through the pipe, and the cooling ring 116 will cool the passing metal particles.

[0048] When the metal ball falls into the water inlet tank 111, the temperature of the coolant in the water tank 111 rises due to the heat exchange, and the sleeve 117 can cool the coolant passing through the water delivery pipe 112;

[0049] refer to Figure 5 The top of the sleeve 117 is connected to an air inlet pipe 119 , which is connected to an external low-temperature inert gas supply device. The external low-temperature inert gas enters the sleeve 117 through the air inlet pipe 119 , and the water pump 113 is connected to the top of the sleeve 117 .

[0050] Specifically, refer to Figure 4 One end of the water trough 111 extends out of the box body 101, and a conveyor belt device 120 is placed in the water trough 111. One end of the conveyor belt device 120 extends out of the water trough 111, and is used to convey the finished spheroidizing agent from the water trough 111, and then discharge it through the discharging device 121. The material discharging end of the conveyor belt device 120 is located outside the box body 101. The conveyor belt device 120 is a large-angle conveyor belt, and the end of the water trough 111 located outside the box body 101 is connected to the discharging device 121.

[0051] The coolant in the water tank 111 will continue to decrease, so that the liquid level of the coolant in the water tank 111 will also decrease. When the coolant is added, the liquid level will rise. The following provides a cover plate 123 structure that can rise and fall to adapt to the height of the liquid level to prevent the inert gas in the cooling chamber 103 from leaking out: Figure 2 Specifically, an annular guide plate 122 is arranged on the inner wall of the water tank 111, and the bottom of the guide plate 122 is arranged toward the conveyor belt device 120, so as to guide the falling spheroidizing agent particles to the conveying area of ​​the conveyor belt device 120. The bottom of the guide plate 122 is arranged toward the conveyor belt device 120. A symmetrical slide rail 125 is arranged on the inner wall of the water tank 111, and the cover plate 123 moves up and down along the slide rail 125. The cover plate 123 is connected to the slide rail 125 for sliding up and down. The bottom of the cover plate 123 is connected to a floating plate 124, which floats on the liquid surface of the coolant, thereby shielding the distance between the liquid surface and the side wall of the box body 101 to prevent leakage of the internal inert gas. The floating plate 124 floats on the water surface, and brushes in contact with the inner wall of the water tank 111 are arranged on both sides of the cover plate 123, and the brushes block the internal airflow from running out;

[0052] refer to Figure 2 A baffle 126 for blocking water waves is connected to the inner wall of the water tank 111. When the spheroidizing agent falls into the coolant, the liquid surface will be moved. The movement of the liquid surface will cause the cover plate 123 to move up and down frequently. The baffle 126 blocks the movement of the water surface to prevent the fluctuation of the liquid surface from affecting the cover plate 123. The baffle 126 penetrates deep into the coolant.

[0053] After the metal liquid is impacted by the coolant, fine metal particles will be produced. After the metal particles enter the coolant, they will move with the flow of the liquid because they are too small. The following is a structure for intercepting fine metal particles: Reference Figure 5 and Figure 6 Specifically, the filter device 114 includes a fixed seat 127 and a filter screen 128. The filter screen 128 intercepts fine metal particles in the coolant. The fixed seat 127 is provided with a coaxially arranged filter chamber 129 and a sliding chamber 130. The sliding chamber 130 is provided with a delivery pipe 131 extending into the filter chamber 129. The coolant enters the filter chamber 129 through the delivery pipe 131. The other end of the delivery pipe 131 extends into the water tank 111. A water outlet is provided on the outer wall of one end of the delivery pipe 131 located in the filter chamber 129. The coolant enters the filter screen 128 after passing through the water outlet. A moving pipe 132 is slidably connected to the outer wall of the delivery pipe 131. The moving pipe 132 can move back and forth on the outer wall of the delivery pipe 131. When it moves to one side of the water outlet, the water outlet can be blocked, thereby blocking the water flow. The two ends of the moving pipe 132 are respectively located in the sliding chamber 130 and the filter chamber 129.

[0054] When the filter 128 is cleaned, the coolant in the water supply pipes 112 on both sides will flow out of the filter chamber 129, resulting in a waste of coolant. The following provides a structure that can automatically close the coolant pipes on both sides when the filter 128 is replaced: Figure 5 and Figure 6 A spring 133 is connected between one end of the moving tube 132 located in the sliding chamber 130 and the side wall of the sliding chamber 130. The spring 133 pushes the moving tube 132 to move toward the end close to the filter chamber 129. A positioning boss 134 and an arc-shaped plate 135 fixed on the edge are provided at one end of the moving tube 132 located in the filter chamber 129. The filter screen 128 is sleeved on the boss 134. The filter screen 128 can be sleeved on the boss 134. A sliding groove for the arc-shaped plate 135 to move is provided on the top of the filter chamber 129. The end of the filter screen 128 away from the moving tube 132 is connected with a mounting cover 136. When the filter screen 128 is removed through the installation cover 136, the spring 133 will push the delivery pipe 131 to move, so that the moving pipe 132 covers the water outlet hole on the delivery pipe 131, blocking the liquid delivery of the delivery pipe 131, and at the same time, the arc plate 135 on the other side of the moving pipe 132 will move along the inner wall of the filter chamber 129, thereby blocking the top water supply pipe 112 to prevent the coolant in the water supply pipe 112 from flowing out. It should be noted that when the installation cover 136 is removed, some coolant will still flow out of the filter chamber 129, but it will not affect the replacement of the filter screen 128;

[0055] An internal thread is provided at one end of the filter cavity 129 away from the sliding cavity 130 , and the mounting cover 136 and the filter screen 128 are conveniently mounted on the fixing seat 127 through the thread. An external thread is provided on the outer ring surface of the mounting cover 136 for mounting on the filter cavity 129 .

[0056] refer to Figure 8 Specifically, the discharging device 121 includes a bar frame 137, which is fixed on the outer wall of the water tank 111. The length of the bar frame 137 is longer than the width of the conveyor belt device 120, which increases the range of material receiving. The inside of the bar frame 137 is connected with a receiving plate 138 and a discharge plate 139 located at the bottom of the guide plate 122. The receiving plate 138 and the discharge plate 139 are inclined. The conveyor belt device 120 conveys the formed spheroidizing agent to the bar frame 137, and the spheroidizing agent falls into the bar frame 137. The receiving plate 138 plays a role in receiving the spheroidizing agent. Then the spheroidizing agent moves toward the discharge plate 139 due to the inclined surface, and finally is transported out from the discharge plate 139. The bottom of the receiving plate 138 is arranged toward the top of the discharge plate 139, and a guide groove is arranged inside the discharge plate 139.

[0057] Specifically, refer to Figure 1 and Figure 2 The bottom of the box body 101 is connected to an air outlet pipe 140 , and the inert gas in the cooling chamber 103 is discharged from the air outlet pipe 140 at the bottom of the box body 101 . The bottom of the box body 101 is connected to a base 141 , and the base 141 supports the box body 101 .

[0058] A method for forming spheroidizing agent alloy particles, using the injection molding equipment of claim 8, comprising the following steps:

[0059] S1. Adding materials: Start the driving device 108 and the water pump 113 to pour the molten metal into the crucible 102. The driving device 108 drives the rotating nozzle 105 to rotate through the chain transmission component 109. The rotating rotating nozzle 105 will throw the molten metal in the cavity 106 out through the liquid outlet pipe 107, and promote the uniform distribution of the spheroidizing agent alloy particle components through the action of centrifugal force, thereby improving the microstructure and chemical composition consistency of the alloy particles;

[0060] S2, primary forming: the water pump 113 supplies the coolant in the water tank 111 to the atomizer 110. The water flow sprayed by the atomizer 110 impacts the molten metal. The low-temperature coolant sprayed by the atomizer 110 can break the molten metal into particles, change its motion trajectory, and make it move downward. At the same time, it has a cooling effect on the molten metal.

[0061] S3, cooling: the low-temperature inert gas from the outside is introduced into the sleeve 117 through the air inlet pipe 119. The low-temperature inert gas is argon gas. The low-temperature inert gas cools the internal water supply pipe 112. At the same time, part of the gas enters the cooling ring 116 through the pipe. The argon gas is sprayed from the cooling ring 116 to cool the falling granular metal and prevent oxidation. At the same time, the cooling ring 116 has the function of guiding the falling metal particles and coolant to prevent the coolant and metal particles from moving away from the axis, so that the formed metal particles can be in the same position. The lower the temperature of the gas sprayed from the cooling ring 116, the lower the temperature is, which plays a role of gradually cooling. By gradually reducing the temperature, a large temperature difference inside the spheroidizer is prevented;

[0062] S4, cooling and molding: the metal particles finally fall into the water tank 111 for final cooling. The coolant in the water tank 111 is the last cooling step. The conveyor belt device 120 lifts the formed spheroidizer and transports it to the discharging device 121, and the finished spheroidizer is transported out through the discharging device 121.

[0063] The above-mentioned embodiments are only preferred embodiments of the present invention and cannot be used to limit the scope of protection of the present invention. Any non-substantial changes and substitutions made by technicians in this field on the basis of the present invention shall fall within the scope of protection required by the present invention.

Claims

1. A protective atmosphere spray molding device, comprising a box (101) and a crucible (102), wherein a cooling chamber (103) is provided inside the box (101), and the crucible (102) is located on the top of the box (101), characterized in that: The bottom of the crucible (102) is connected to a connecting pipe (104) extending into the cooling chamber (103); the bottom of the outer wall of the connecting pipe (104) is rotatably connected to a rotating nozzle (105); a cavity (106) located at the bottom of the connecting pipe (104) is provided inside the rotating nozzle (105); a liquid outlet pipe (107) extending from the rotating nozzle (105) is provided at the bottom of the cavity (106); and the liquid outlet pipe (107) is bent downward; A driving device (108) is installed on the top of the box (101), and the output end of the driving device (108) is connected to the top of the rotating nozzle (105) through a chain transmission component (109). An atomizer (110) is provided at the bottom of the rotating nozzle (105). The atomizer (110) is fixed to the top of the cooling chamber (103) through a bracket, and the bottom of the atomizer (110) is provided with an annular atomizing nozzle arranged obliquely toward the axis of the connecting pipe (104); A water tank (111) is provided at the bottom of the cooling chamber (103), the water tank (111) is filled with cooling liquid, a cooling component is provided at the top of the water tank (111), a water supply pipe (112) is connected between the water tank (111) and the atomizer (110), a water pump (113) is connected at the top of the water supply pipe (112), and a filtering device (114) is connected at the bottom of the water supply pipe (112).

2. A protective atmosphere spray molding equipment according to claim 1, characterized in that: The cooling component comprises a support frame (115) and a plurality of cooling rings (116) fixed on the support frame (115); a heat exchange device is connected to the outer wall of the box body (101); the heat exchange device is sleeved on the water supply pipe (112); the heat exchange device comprises a sleeve (117) and a spiral plate (118) located in the sleeve (117); the top chamber in the sleeve (117) is connected to the cooling ring (116) at the bottom through a pipe; the middle chamber of the sleeve (117) is connected to the cooling ring (116) at the middle through a pipe; the bottom chamber of the sleeve (117) is connected to the cooling ring (116) at the top through a pipe; and the air flow nozzle at the bottom of the cooling ring (116) is arranged toward the axis of the connecting pipe (104); The top of the sleeve (117) is connected to an air inlet pipe (119), and the air inlet pipe (119) is connected to an external low-temperature inert gas supply device. The water pump (113) is connected to the top of the sleeve (117).

3. The protective atmosphere spray molding equipment according to claim 1, characterized in that: One end of the water trough (111) extends out of the box body (101), a conveyor belt device (120) is placed in the water trough (111), a material discharge end of the conveyor belt device (120) is located outside the box body (101), and one end of the water trough (111) located outside the box body (101) is connected to a discharge device (121).

4. A protective atmosphere spray molding equipment according to claim 3, characterized in that: An annular guide plate (122) is arranged on the inner wall of the water tank (111), the bottom of the guide plate (122) is arranged toward the conveyor belt device (120), a symmetrical slide rail (125) is arranged on the inner wall of the water tank (111), a cover plate (123) is slidably connected in the slide rail (125) up and down, a floating plate (124) is connected to the bottom of the cover plate (123), the floating plate (124) floats on the water surface, and brushes in contact with the inner wall of the water tank (111) are arranged on both sides of the cover plate (123), and the brushes prevent the internal airflow from escaping; A baffle (126) for blocking water waves is connected to the inner wall of the water tank (111), and the baffle (126) penetrates deep into the cooling liquid.

5. The protective atmosphere spray molding equipment according to claim 1, characterized in that: The filtering device (114) comprises a fixed seat (127) and a filtering net (128); a coaxially arranged filtering chamber (129) and a sliding chamber (130) are provided inside the fixed seat (127); a delivery pipe (131) extending into the filtering chamber (129) is provided inside the sliding chamber (130); the other end of the delivery pipe (131) extends into the water tank (111); a water outlet is provided on the outer wall of one end of the delivery pipe (131) located in the filtering chamber (129); a moving pipe (132) is slidably connected to the outer wall of the delivery pipe (131); the two ends of the moving pipe (132) are respectively located in the sliding chamber (130) and the filtering chamber (129).

6. The protective atmosphere spray molding equipment according to claim 5, characterized in that: A spring (133) is connected between one end of the movable tube (132) located in the sliding chamber (130) and the side wall of the sliding chamber (130); one end of the movable tube (132) located in the filter chamber (129) is provided with a positioning boss (134) and an arc-shaped plate (135) fixed on the edge; the filter screen (128) is sleeved on the boss (134); a sliding groove for the arc-shaped plate (135) to move is provided at the top of the filter chamber (129); an installation cover (136) is connected to one end of the filter screen (128) away from the movable tube (132); an internal thread is provided at one end of the filter chamber (129) away from the sliding chamber (130); and an external thread installed on the filter chamber (129) is provided on the outer ring surface of the installation cover (136).

7. The protective atmosphere spray molding equipment according to claim 3, characterized in that: The discharging device (121) comprises a bar frame (137), the bar frame (137) being fixed on the outer wall of the water tank (111), the interior of the bar frame (137) being connected with a receiving plate (138) and a discharge plate (139) located at the bottom of the guide plate (122), the receiving plate (138) and the discharge plate (139) being arranged at an angle, the bottom of the receiving plate (138) being arranged toward the top of the discharge plate (139), and a guide groove being arranged inside the discharge plate (139).

8. The protective atmosphere spray molding equipment according to claim 1, characterized in that: The bottom of the box body (101) is connected to an air outlet pipe (140), and the bottom of the box body (101) is connected to a base (141).

9. A method for forming spheroidizing agent alloy particles, using the protective atmosphere spray forming equipment of claim 8, characterized in that: The following steps are involved: S1, adding material: starting the driving device (108) and the water pump (113), pouring the molten metal into the crucible (102), and the driving device (108) drives the rotating nozzle (105) to rotate, and the molten metal is thrown out by centrifugal force; S2, primary forming: the water pump (113) supplies the cooling liquid in the water tank (111) to the atomizer (110), and the water flow sprayed from the atomizer (110) impacts the molten metal to break it into particles and change its motion trajectory to make it move downward; S3, cooling: low-temperature inert gas from the outside is introduced into the casing (117) through the air inlet pipe (119), and the low-temperature inert gas cools the internal water supply pipe (112). At the same time, part of the gas enters the cooling ring (116) through the pipe, and the inert gas is sprayed from the cooling ring (116) to cool the falling granular metal and prevent oxidation. The lower the temperature of the gas sprayed from the cooling ring (116), the lower the temperature is, which plays a role of gradual cooling; S4, cooling and molding: the metal particles finally fall into the water tank (111) for final cooling, the conveyor belt device (120) lifts the molded spheroidizing agent and transports it to the discharging device (121), and the finished spheroidizing agent is transported out through the discharging device (121).

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