A kind of casting equipment for household appliance parts

Abstract

The present invention relates to the field of casting technology, and in particular to a casting device for household appliance accessories, including a base and a bracket, etc.; two brackets are arranged on the upper side of the base. The present invention realizes that after the molten metal is immersed in the receiver, the molten metal enters the receiver from the opening on the lower side of the receiver, so that the oxide scale floating on the liquid surface cannot enter the receiver from the opening on the lower side of the receiver, thereby preventing the molten metal contained in the receiver from containing oxide scale; the molten metal on the surface of the receiver is gathered at the flow groove through the flow groove, so that the molten metal is gathered into molten metal that is easy to flow and discharged in a specific direction, so as to promote the molten metal to leave the surface faster; the plug is set to an inverted cone shape, so that the molten metal flowing out of the lower side of the receiver is gradually gathered along the inverted cone surface of the plug, so that the molten metal is evenly cast in the mold, ensuring that all parts of the mold are filled at the same time, reducing defects such as pores and shrinkage holes, and improving the density and mechanical properties of the casting.

Description

Technical Field

[0001] The invention relates to the technical field of casting, and in particular to a casting device for household appliance parts. Background Art

[0002] Home appliance accessories are mainly defined as small internal parts. When producing home appliance accessories, they are mainly produced by making separate molds, and then pouring molten metal into the molds to cool and form them, thereby completing the production of the home appliances. Before casting, the existing method of loading and taking molten metal is to extend the salvage structure into the molten metal, and after the molten metal is salvaged, the salvaged molten metal is poured into the mold. During the salvaging process, the liquid surface of the molten metal is in direct contact with the outside air, which causes a layer of oxide scale to form on the surface of the molten metal. The oxide scale is easily removed during the salvaging process and then cast in the mold, which will reduce the overall structural strength and toughness of the home appliance accessories and affect their service life.

[0003] There is a method in the prior art of directly extracting molten metal through a pipeline for casting, but this method requires strict process control and operating skills, and the extraction equipment, especially the pipeline that transports the molten metal in the extraction equipment, also needs to maintain a relatively stable temperature at all times. Otherwise, the molten metal in the pipeline is very easy to solidify and oxidize due to the gradual loss of heat due to flow, which will cause the entire equipment to operate poorly. Compared with the ladle method of taking and using as needed, it is also necessary to stabilize the pipeline temperature through a heating structure, which consumes more energy and has lower production efficiency. Summary of the invention

[0004] In order to overcome the shortcomings of the prior art that the oxide scale is easily fished out together with the molten metal and cast in the mold, which affects the strength and toughness of the home appliance parts, and the oxide scale is easily adhered to the surface of the salvaging equipment and dripped into the casting mold, affecting the purity of the metal, the present invention provides a home appliance parts casting equipment.

[0005] The technical solution of the present invention is: a casting device for household appliance accessories, including a base, a bracket and a molten pool; two brackets are arranged on the upper side of the base; a molten pool is installed in the middle of the base; it also includes a casting assembly, a taker, a plug and a dispersion system; a casting assembly for casting molten metal in a mold is commonly arranged on the two brackets; a taker for preventing oxide scale from being drawn into the molten metal is installed on the casting assembly; an opening is arranged on the lower side of the taker; a plug is arranged on the casting assembly, the plug is located at the bottom of the taker and is used to block the opening on the lower side of the taker; a dispersion system for preventing oxide scale from being fished out is connected to the bracket; a guide part is arranged on the upper side of the taker to prevent oxygen from contacting the molten metal in the taker; the dispersion system consists of a servo motor, a turntable and a paddle; a servo motor is fixedly connected to the upper side of the casting assembly; a turntable is fixedly connected to the rotating part of the servo motor; and a number of paddles for preventing oxide scale from adhering are fixedly connected to the outer side of the taker.

[0006] As a preferred technical solution of the present invention, the casting assembly includes a slide rail, an electric slider, a fixed plate and a first air pipe, a first electric push rod and a second electric push rod; each bracket is fixedly connected to a slide rail; each slide rail is slidably connected to an electric slider; the two electric sliders are commonly fixedly connected to a fixed plate on the opposite sides; the upper side of the receiver is connected to the first air pipe; the end of the first air pipe away from the receiver is connected to the outside world; the upper side of the receiver is connected to the second electric push rod for casting molten metal in the mold; the second electric push rod is fixedly connected to the plug; the guide part is connected to the first air pipe; the guide part is fixedly connected to the second electric push rod; the turntable is rotatably connected to the fixed plate; the rotating part of the servo motor passes through the fixed plate and is connected to the turntable; the lower side of the turntable is fixedly connected to the first electric push rod.

[0007] As a preferred technical solution of the present invention, a plurality of flow grooves for reducing the residual molten metal are arranged in an annular shape on the outer side of the receiving vessel.

[0008] As a preferred technical solution of the present invention, the plug is configured to be in an inverted cone shape.

[0009] As a preferred technical solution of the present invention, it also includes a connecting ring, a water level sensor and a second air pipe; the connecting ring is fixedly connected to the upper side of the receiving device; the connecting ring is provided with a plurality of drainage ports for salvaging oxide scale; the lower side of the fixed plate is connected to the second air pipe for extracting oxide scale; the second air pipe is connected to an external pump.

[0010] As a preferred technical solution of the present invention, it also includes a scraper; the second air pipe is fixedly connected with a scraper for centrally cleaning the oxide scale.

[0011] As a preferred technical solution of the present invention, the inclination of the side of the connecting ring is greater than the inclination of the side of the receiving device.

[0012] As a preferred technical solution of the present invention, each liquid discharge port on the connecting ring is arranged to be inclined toward the rotation direction of the receiving device.

[0013] As a preferred technical solution of the present invention, the plug is made of high temperature resistant graphite material.

[0014] As a preferred technical solution of the present invention, a heat-insulating layer is provided outside the molten pool.

[0015] The present invention has the following advantages: after the molten metal is immersed in the receiving container, the molten metal enters the receiving container from the opening at the bottom of the receiving container, and then the molten metal below the liquid surface is scooped out, so that the oxide scale floating on the liquid surface cannot enter the receiving container from the opening at the bottom of the receiving container, thereby preventing the molten metal in the receiving container from containing oxide scale;

[0016] The molten metal on the surface of the receiver is gathered at the flow groove through the flow groove, so that the molten metal is gathered into molten metal that is easy to flow and discharged in a specific direction. At the same time, the groove breaks this continuous smooth surface, reduces the contact area between the molten metal and the surface of the receiver, and promotes the molten metal to leave the surface faster;

[0017] By setting the plug in an inverted cone shape, the molten metal flowing out from the lower side of the receiver gradually converges along the inverted cone surface of the plug, so that the molten metal is evenly cast in the mold, ensuring that all parts of the mold are filled at the same time, reducing defects such as pores and shrinkage cavities, and improving the density and mechanical properties of the casting;

[0018] The oxide scale is moved away from the receiving device by the paddle, so that the oxide scale cannot adhere to the surface of the receiving device during the downward movement of the receiving device, thereby facilitating the subsequent salvaging of the oxide scale.

[0019] By making the inclination of the side of the connecting ring greater than that of the receiver, the impurities that are pressed into the molten metal and float up are blocked by the side of the connecting ring with a larger inclination angle, and then the impurities are drawn into the guide part through the discharge port, thereby improving the equipment's ability to collect impurities pressed into the molten metal. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 It is a schematic diagram of the three-dimensional structure of the household appliance parts casting equipment of the present invention;

[0021] Figure 2 It is a combined cross-sectional view of the base and the molten pool of the present invention;

[0022] Figure 3 It is a cross-sectional view of the receiving device of the present invention;

[0023] Figure 4 It is a schematic diagram of the three-dimensional structure of the servo motor, turntable and paddle combination of the present invention;

[0024] Figure 5 It is a schematic diagram of the three-dimensional structure of the connection ring and the second air pipe combination of the present invention;

[0025] Figure 6 It is a schematic diagram of the three-dimensional structure of the connection ring and the water level sensor combination of the present invention;

[0026] Figure 7 It is the front view of the connecting ring and the water level sensor of the present invention.

[0027] Among them: 1-base, 2-bracket, 3-molten pool, 4-receiver, 4001-flow groove, 4002-guide part, 5-blocker, 101-slide rail, 102-electric slider, 103-fixed plate, 104-first air pipe, 105-first electric push rod, 106-second electric push rod, 201-connecting ring, 20101-drain port, 202-water level sensor, 203-second air pipe, 204-scraper, 301-servo motor, 302-turntable, 303-paddle. DETAILED DESCRIPTION

[0028] The present invention is further described below in conjunction with specific embodiments. It should also be noted that, unless otherwise clearly specified and limited, terms such as: setting, installing, connecting, and connecting should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0029] Example 1

[0030] like Figure 1-Figure 4 As shown, a casting device for household appliance parts includes a base 1, a bracket 2 and a molten pool 3; two brackets 2 are arranged on the upper side of the base 1; and the molten pool 3 is installed in the middle of the base 1;

[0031] It also includes a casting assembly, a receiver 4, a plug 5 and a dispersion system; the two brackets 2 are jointly provided with a casting assembly; the receiver 4 is installed on the casting assembly; the lower side of the receiver 4 is provided with an opening; the casting assembly is provided with a plug 5, which is located at the bottom of the receiver 4 and is used to block the lower opening of the receiver 4; the dispersion system is connected to the bracket 2; the upper side of the receiver 4 is provided with a guide part 4002 for preventing oxygen from contacting with the molten metal in the receiver 4; the dispersion system consists of a servo motor 301, a turntable 302 and a paddle 303; the servo motor 301 is fixedly connected to the upper side of the casting assembly; the turntable 302 is fixedly connected to the rotating part of the servo motor 301; and a number of paddles 303 are fixedly connected to the outer side of the receiver 4 for preventing oxide scale from adhering.

[0032] The casting assembly includes a slide rail 101, an electric slider 102, a fixed plate 103 and a first air pipe 104, a first electric push rod 105 and a second electric push rod 106; each bracket 2 is fixedly connected to a slide rail 101; each slide rail 101 is slidably connected to an electric slider 102; the two electric sliders 102 are commonly fixedly connected to a fixed plate 103 on the opposite sides; the upper side of the taker 4 is connected to the first air pipe 104; the end of the first air pipe 104 away from the taker 4 is connected to the outside; the upper side of the taker 4 is connected to the second electric push rod 106; the second electric push rod 106 is fixedly connected to the plug 5; the guide part 4002 is connected to the first air pipe 104; the guide part 4002 is fixedly connected to the second electric push rod 106; the turntable 302 is rotatably connected to the fixed plate 103; the rotating part of the servo motor 301 passes through the fixed plate 103 and is connected to the turntable 302; the lower side of the turntable 302 is fixedly connected to the first electric push rod 105.

[0033] A plurality of flow grooves 4001 are arranged in a ring shape on the outer side of the receiving device 4 .

[0034] The plug 5 is configured in an inverted cone shape.

[0035] The plug is made of high temperature resistant graphite.

[0036] A heat-insulating layer is provided outside the molten pool.

[0037] When casting home appliance accessories, the molten metal in the molten pool 3 is scooped out and transferred to the position of the mold to be cast, and then the molten metal is poured into the mold for cooling and shaping. When the molten metal in the molten pool 3 is scooped out, since the top of the molten pool 3 is in an open state, the surface of the molten metal contacts with oxygen in the air, thereby forming an oxide scale. In the process of loading and unloading the molten metal in the molten pool 3, the surface oxide scale is easily loaded into the molten metal. After casting and cooling, the home appliance accessories are mixed with oxide scales, which reduces the overall structural strength and toughness of the home appliance accessories, thereby affecting the service life. In order to avoid this phenomenon, when the molten metal in the molten pool 3 needs to be taken out, after the molten pool 3 is fixed by the base 1, the two electric sliders 102 are started to move backward synchronously, and then move backward on the slide rail 101 of the bracket 2, thereby driving the taker 4, the fixing plate 103, the first air pipe 104 and the first electric push rod 105 to move backward. When the taker 4 moves to just above the molten pool 3, the first electric push rod 105 is started to extend downward. Figure 2As shown, the taker 4 is immersed in the molten metal in the molten pool 3, and the upper side of the taker 4 is always higher than the liquid level of the molten metal. Then, the second electric push rod 106 is controlled to retract upward for a distance, thereby driving the plug 5 to move upward, so that the lower side of the taker 4 is connected with the molten pool 3, and then the molten metal flows into the taker 4 from the lower side of the taker 4. When the liquid level of the molten metal in the taker 4 is at the same height as the liquid level of the molten metal outside the taker 4, the molten metal stops entering the taker 4. Then, the second electric push rod 106 is controlled to extend downward to make the plug 5 block the opening on the lower side of the taker 4. In the process of the molten metal entering the taker 4, the air in the taker 4 is discharged through the first air pipe 104. At this time, the first electric push rod 105 is retracted upward to the initial state, thereby driving the taker 4 containing the molten metal to move upward. In this process, the molten metal is removed by scooping The molten metal below the liquid surface is taken so that the oxide scale floating on the liquid surface cannot enter the receiver 4 from the opening at the lower side of the receiver 4, thereby preventing the molten metal in the receiver 4 from containing oxide scale. At this time, the two electric sliders 102 are controlled to slide forward, thereby driving the receiver 4 containing the molten metal to be transferred to the casting area, and then the second electric push rod 106 is controlled to retract upward for a distance to open the opening at the lower side of the receiver 4, and the molten metal is cast in the mold; compared with the prior art method of using a negative pressure or low-pressure pipeline to extract the molten metal into the mold, the present invention does not need to set up a transportation pipeline, thereby reducing the heat loss during the molten metal transfer process, and there is no need to set up an additional constant temperature structure for the pipeline, so as to avoid the phenomenon of solidification and oxidation of the molten metal during the transfer process as much as possible. While solving the problem of oxide impurities, the present invention can save this part of energy consumption used to maintain the temperature of the pipeline.

[0038] In the process of immersing the pick-up device 4 in the molten metal, considering that molten metal is likely to remain on the surface of the pick-up device 4, when the pick-up device 4 is casting the mold, in order to prevent the molten metal flowing down from the surface of the pick-up device 4 from dripping into the area of ​​the mold where the molten metal does not need to be poured, a plurality of flow grooves 4001 are opened on the surface of the pick-up device 4. When the pick-up device 4 separates from the molten metal when moving upward, the flow grooves 4001 are used to make the molten metal on the surface of the pick-up device 4 converge at the flow grooves 4001, so that the molten metal converges into a liquid that is easy to flow and guides the molten metal to be discharged in a specific direction. At the same time, the grooving breaks this continuous smooth surface, reduces the contact area between the molten metal and the surface of the pick-up device 4, reduces the adhesion of the molten metal, prompts the molten metal to separate from the surface faster, and makes it easier for the molten metal to be discharged from the surface of the pick-up device 4 back into the molten pool 3, thereby avoiding the waste of molten metal and preventing the molten metal from dripping into the area of ​​the mold where no pouring is required to affect the closure of the mold.

[0039] It is also considered that in order to make the molten metal flowing out of the opening on the lower side of the receiver 4 more uniform, the plug 5 is set to an inverted cone shape, so that the molten metal flowing out of the lower side of the receiver 4 gradually converges along the inverted cone surface of the plug 5, and then forms a uniform water column flowing downward, so that the molten metal is evenly cast in the mold, ensuring that all parts of the mold are filled at the same time, reducing defects such as pores and shrinkage holes, and improving the density and mechanical properties of the casting.

[0040] In the process of the taker 4 being immersed downwardly in the molten metal, part of the oxide scale is easily attached to the surface of the taker 4. When the taker 4 is immersed in the molten metal for multiple times, the oxide scale is easily adhered to the surface of the taker 4 and drips in the casting area, thereby affecting the quality of the mold. In order to avoid this phenomenon, when the taker 4 is immersed in the molten metal, the servo motor 301 is controlled to rotate slowly counterclockwise based on the view from top to bottom, thereby driving the turntable 302 to rotate counterclockwise, so that the first air pipe 104 and the first electric push rod 105 drive the taker 4 and the paddle 303 to rotate counterclockwise. The rotation of the paddle 303 is used to push the oxide scale away from the taker 4 during the immersion in the molten metal, so that the oxide scale cannot adhere to the surface of the taker 4 during the downward movement of the taker 4.

[0041] Example 2

[0042] On the basis of Example 1, Figure 1 and Figure 5-Figure 7 As shown, it also includes a connecting ring 201, a water level sensor 202 and a second air pipe 203; the connecting ring 201 is fixedly connected to the upper side of the receiving device 4; a plurality of drainage ports 20101 are opened on the connecting ring 201; the lower side of the fixed plate 103 is connected to the second air pipe 203; the second air pipe 203 is connected to an external pump.

[0043] It also includes a scraper 204 ; the scraper 204 is fixedly connected to the second air pipe 203 .

[0044] The inclination of the side of the connecting ring 201 is greater than the inclination of the side of the receiving device 4 .

[0045] Each drain port 20101 on the connecting ring 201 is arranged to be inclined toward the rotation direction of the receiving device 4, so that the side of the drain port 20101 can push the oxide scale to flow toward the guide part 4002 during the rotation process, thereby improving the collection capacity of the oxide scale.

[0046] During the process of the scooping device 4 scooping the molten metal, in order to prevent the oxide scale from accumulating on the surface of the molten metal for a long time and contaminating the molten metal, the first electric push rod 105 is controlled to extend downward. When the water level sensor 202 contacts the liquid surface of the molten metal, the first electric push rod 105 is controlled to stop, so that the lower side of the discharge port 20101 is slightly lower than the surface of the molten metal, so that the oxide scale enters the guide part 4002 from the discharge port 20101 and is then carried and intercepted by the guide part 4002. After the scooping device 4 is lifted out of the molten pool 3, the external pump is controlled to evacuate the second air pipe 203, and then the oxide scale collected in the guide part 4002 is extracted. This reciprocating process is repeated to scoop the oxide scale in the molten pool 3 from the surface of the molten metal, so as to prevent the oxide scale from accumulating on the surface of the molten metal for a long time and contaminating the molten metal, thereby improving the quality of the molten metal.

[0047] It is also considered that by starting the servo motor 301 to rotate slowly counterclockwise based on the view from top to bottom, the connecting ring 201 is driven to rotate counterclockwise. During this process, since each drainage port 20101 on the connecting ring 201 is arranged to be inclined toward the rotation direction of the receiving device 4, during the rotation process, the inclined drainage port 20101 pushes the oxide scale to flow toward the guide part 4002, thereby improving the ability to collect the oxide scale.

[0048] In the above process, when the second air pipe 203 is extracting the oxide scale of the guide part 4002, and the servo motor 301 drives the acceptor 4 to rotate counterclockwise, the second air pipe 203 rotates clockwise relative to the acceptor 4, and then the scraper 204 is attached to the area of ​​the guide part 4002 where the oxide scale is easily accumulated and rotates clockwise, thereby scraping off the residual and accumulated oxide scale on the surface of the guide part 4002, making it easier for the second air pipe 203 to extract the oxide scale, thereby improving the equipment's ability to clean the oxide scale.

[0049] It is also taken into consideration that since the inclination of the side of the connecting ring 201 is greater than the inclination of the receiving device 4, when the paddle 303 moves the oxide scale on the surface of the molten metal to move around, the oxide scale always floats on the surface of the molten metal. As a result, while the receiving device 4 continues to move downward and rotate, the impurities that are pressed into the molten metal and float up are blocked by the side of the connecting ring 201 with a larger inclination angle, so that the impurities are drawn into the guide portion 4002 through the drain port 20101, thereby facilitating the device's ability to collect impurities pressed into the molten metal during the descent of the receiving device 4.

[0050] The above is only a specific embodiment of the present invention, but the protection scope of the present invention is not limited thereto. Any person skilled in the art can easily think of changes or substitutions within the technical scope disclosed by the present invention, which should be included in the protection scope of the present invention. Therefore, the protection scope of the present invention should be based on the protection scope of the claims.

Claims

1. A casting device for household appliance parts, comprising a base (1), a bracket (2) and a molten pool (3); two brackets (2) are arranged on the upper side of the base (1); a molten pool (3) is installed in the middle of the base (1); the characteristics are as follows: The invention also comprises a casting assembly, a take-out device (4), a plug (5) and a spreading system; the two brackets (2) are provided with a casting assembly for casting molten metal into a mold; the casting assembly is provided with a take-out device (4) for preventing oxide scale from being drawn into the molten metal; an opening is provided at the lower side of the take-out device (4); the casting assembly is provided with a plug (5), the plug (5) is located at the inner bottom of the take-out device (4) and is used to block the lower side opening of the take-out device (4); the bracket (2) is connected with a plug (5) for preventing oxide scale from being drawn into the molten metal; the plug (5) is provided at the lower side of the take-out device (4); ... A dispersing system for preventing oxide scale from being removed; a guide portion (4002) for preventing oxygen from contacting the molten metal in the receiver (4) is provided on the upper side of the receiver (4); the dispersing system comprises a servo motor (301), a turntable (302) and a paddle (303); a servo motor (301) is fixedly connected to the upper side of the casting assembly; the turntable (302) is fixedly connected to the rotating portion of the servo motor (301); and a plurality of paddles (303) for preventing oxide scale from adhering are fixedly connected to the outer side of the receiver (4).

2. The home appliance parts casting equipment according to claim 1, characterized in that: The casting assembly comprises a slide rail (101), an electric slider (102), a fixing plate (103), a first air pipe (104), a first electric push rod (105), and a second electric push rod (106); each bracket (2) is fixedly connected to a slide rail (101); each slide rail (101) is slidably connected to an electric slider (102); the two electric sliders (102) are fixedly connected to a fixing plate (103) on opposite sides; the upper side of the take-out device (4) is connected to the first air pipe (104); a portion of the first air pipe (104) away from the take-out device (4) is The end is connected to the outside world; the upper side of the receiving device (4) is connected to a second electric push rod (106) for casting molten metal into the mold; the second electric push rod (106) is fixedly connected to the plug (5); the guide part (4002) is connected to the first air pipe (104); the guide part (4002) is fixedly connected to the second electric push rod (106); the turntable (302) is rotatably connected to the fixed plate (103); the rotating part of the servo motor (301) passes through the fixed plate (103) and is connected to the turntable (302); the lower side of the turntable (302) is fixedly connected to the first electric push rod (105).

3. The home appliance parts casting equipment according to claim 2, characterized in that: A plurality of flow grooves (4001) for reducing residual molten metal are arranged in an annular shape on the outer side of the receiving vessel (4).

4. The home appliance parts casting equipment according to claim 3, characterized in that: The plug (5) is configured to be in an inverted cone shape.

5. The home appliance parts casting equipment according to claim 4, characterized in that: It also includes a connecting ring (201), a water level sensor (202) and a second air pipe (203); the connecting ring (201) is fixedly connected to the upper side of the receiving device (4); a plurality of drainage ports (20101) for salvaging oxide scale are provided on the connecting ring (201); the lower side of the fixing plate (103) is connected to the second air pipe (203) for extracting oxide scale; and the second air pipe (203) is connected to an external pump.

6. The home appliance parts casting equipment according to claim 5, characterized in that: It also includes a scraper (204); the scraper (204) for centrally cleaning oxide scale is fixedly connected to the second air pipe (203).

7. The home appliance parts casting equipment according to claim 5, characterized in that: The inclination of the side of the connecting ring (201) is greater than the inclination of the side of the receiving device (4).

8. The home appliance parts casting equipment according to claim 7, characterized in that: Each liquid discharge port (20101) on the connecting ring (201) is arranged to be inclined toward the rotation direction of the receiving device (4).

9. The home appliance parts casting equipment according to claim 1, characterized in that: The plug (5) is made of high temperature resistant graphite material.

10. The home appliance parts casting equipment according to claim 1, characterized in that: A heat-insulating layer is arranged outside the molten pool (3).

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