Nodular cast iron casting equipment

Abstract

The invention discloses nodular cast iron casting equipment which comprises a sprue cup body, a feeding assembly used for feeding of the sprue cup body, a casting tank body and a separation assembly, the sprue cup body is located at the sprue position of a sand box and comprises an outer cup body and an inner cup body which are detachable, and the inner cup body is located in the outer cup body and coaxially arranged with the outer cup body; the top of the outer cup body is higher than the top of the inner cup body, an outer runner with an annular horizontal section is formed between the inner cup body and the outer cup body, a first filter screen is arranged in the outer runner, and an inner runner is formed in the inner cup body. The metal casting liquid overflows after the inner cup body is filled with the metal casting liquid, as the slag floats on the surface of the metal casting liquid, the slag can diverge and flow to the outer cup body, the metal casting liquid and the slag are shunted, the purity of the metal casting liquid is kept, meanwhile, pouring and feeding channels are kept unblocked, and the yield and performance of nodular iron castings are improved.

Description

Technical Field

[0001] The present invention relates to the technical field of casting, in particular to ductile iron casting equipment. Background Art

[0002] Ductile iron (Ductile Iron) is a high-strength, high-toughness cast iron material widely used in automotive, machinery, and pipeline applications. During the pouring process, molten metal enters the mold cavity through the pouring cup. Due to spheroidization treatments (such as the addition of magnesium and rare earth elements) and oxidation reactions during the smelting process, a large amount of slag (such as MgO and SiO2) is generated in the molten metal. Due to its low density, this slag typically floats on the surface of the molten metal within the pouring cup. During pouring, the slag can be drawn into the mold cavity by the molten metal, causing slag inclusion defects in the casting. Slag accumulation at the junction of the pouring cup and the mold can hinder shrinkage feeding and cause shrinkage cavities. Slag adhering to the inner wall of the pouring cup or at the outlet can alter the flow of the molten metal, causing pouring discontinuities and impacting process stability.

[0003] Currently, the industry mainly uses manual slag removal, filter nets, and optimization of the shape of the pouring cup to alleviate the problems caused by slag. Manual slag removal is inefficient and cannot completely avoid slag residue. The filter net can block the slag, but it will form a flow-limiting effect at the gate, affecting the pouring efficiency and the subsequent shrinkage compensation effect. The effect of optimizing the shape of the pouring cup is also limited due to space limitations. Summary of the Invention

[0004] The present invention aims to solve the problems of slag curling, shrinkage feeding obstruction and pouring instability caused by slag in the pouring gate during ductile iron pouring in the prior art, and proposes a ductile iron casting equipment. The pouring cup is designed with a double layer of inner and outer cups. The inner cup is used for pouring molten metal and the outer cup is used for collecting slag, thereby reducing the adverse effects of slag on pouring.

[0005] In order to achieve the above object, the present invention adopts the following technical solutions: A ductile iron casting device includes a first conveying platform for conveying a sand box and a pouring tank body. The pouring tank body is located above the conveying path of the first conveying platform. The pouring tank body pours molten metal at the pouring gate of the sand box. The pouring gate of the sand box is provided with a pouring cup body. The pouring cup body includes an outer cup body and an inner cup body that can be combined or separated. The outer contour of the outer cup body matches the inner contour of the pouring gate of the sand box. When the outer cup body and the inner cup body are combined, the inner cup body is located inside the outer cup body and is coaxially arranged with the outer cup body. An annular first filter screen is fixedly provided on the outside of the inner cup body. A limiting ring for limiting the lower portion of the first filter screen is provided on the inside of the outer cup body. A first coupling member is provided on the outside of the outer cup body. A bracket is provided on the top of the inner cup body. The bracket is provided with a second coupling member for limiting the lower portion of the first coupling member. The top of the outer cup body is higher than the top of the inner cup body, the bottom surface of the outer cup body and the bottom surface of the inner cup body are located at the same horizontal plane, an outer flow channel with a ring-shaped horizontal cross-section is formed between the inner cup body and the outer cup body, the first filter screen matches the horizontal cross-section of the outer flow channel, and an inner flow channel is formed inside the inner cup body.

[0006] During pouring, the inner cup body is combined with the outer cup body to keep the metal casting liquid inside the inner cup body in a top overflow state, and the overflowing metal casting liquid enters the mold cavity of the sand box from the outer flow channel; after pouring, the outer cup body is left inside the gate of the sand box, and the inner cup body and the outer cup body are separated.

[0007] Preferably, the inner wall of the inner cup body is provided with a spiral protrusion.

[0008] Preferably, a second filter screen is provided at the bottom of the inner cup body.

[0009] Preferably, the inner cup body realizes separation and contact of the second combining member and the first combining member by rotating relative to the outer cup body. When the second combining member is separated from the first combining member, the inner cup body moves axially relative to the outer cup body to realize separation between the inner cup body and the outer cup body.

[0010] Preferably, the ductile iron casting equipment also includes a separation component for separating the inner cup body from the outer cup body, the separation component includes a second clamping member and a second functional cylinder, the axis of the second functional cylinder is vertically arranged, the second clamping member is fixedly connected to the working end of the second functional cylinder, and the second clamping member is used to clamp the inner cup body and realize the rotation of the inner cup body relative to the outer cup body.

[0011] Preferably, the second clamping member includes a second clamping plate, a fourth functional cylinder, a second connecting seat and a third connecting seat, the third connecting seat is fixedly connected to the working end of the second functional cylinder, the second connecting seat is rotatably connected to the third connecting seat, two fourth functional cylinders are symmetrically arranged on the second connecting seat, the first end of the fourth functional cylinder is fixedly connected to the second connecting seat, the second end of the fourth functional cylinder is fixedly connected to the second clamping plate, and the two second clamping plates are approached or separated to achieve clamping and loosening of the top bracket of the inner cup body.

[0012] Preferably, the ductile iron casting equipment also includes a loading assembly, which includes a first clamping member and a first functional cylinder. The axis of the first functional cylinder is vertically arranged, and the first clamping member is fixedly connected to the working end of the first functional cylinder. The first clamping member is used to clamp the inner cup body to realize the installation of the gate cup body on the gate of the sand box.

[0013] Preferably, the first clamping member includes a first clamping plate, a third functional cylinder and a first connecting seat), the first connecting seat is fixedly connected to the working end of the first functional cylinder, two third functional cylinders are symmetrically arranged on the first connecting seat), the first end of the third functional cylinder is fixedly connected to the first connecting seat), the second end of the third functional cylinder is fixedly connected to the first clamping plate, and the two first clamping plates are approached or separated to achieve clamping and loosening of the top bracket of the inner cup body.

[0014] Preferably, the ductile iron casting equipment further comprises a second conveying platform, the second conveying platform is used to convey the pouring cup body, and the first clamping member is used to clamp the pouring cup body on the second conveying platform and convey it to the pouring gate of the sand box.

[0015] Preferably, the ductile iron casting equipment further comprises a third conveying platform, the third conveying platform is used to convey the inner cup body, and the second clamping member is used to clamp the inner cup body and convey it to the third conveying platform.

[0016] The beneficial effects of the present invention are: 1. The pouring cup of this ductile iron casting equipment adopts a double-layer design. The pouring cup consists of an outer cup and an inner cup. The outer cup and the inner cup are detachable. The molten metal is poured into the inner cup, which serves as the main pouring channel. After the molten metal fills the inner cup, it overflows. Since the slag floats on the surface of the molten metal, the slag will diverge and flow to the outer cup, realizing the diversion of the molten metal and the slag, maintaining the purity of the molten metal, and keeping the pouring and feeding channels unobstructed, thereby improving the yield and performance of ductile iron castings.

[0017] 2. The outer cup and inner cup of the pouring cup of this ductile iron casting equipment are split-type designs. During pouring, the outer cup is combined with the inner cup to realize the diversion of molten metal and slag. After pouring, the outer cup is left inside the pouring mouth of the sand box, and the inner cup is separated from the outer cup. The inner cup can take the filter screen and slag away from the outer cup, avoiding the influence of the flow limiting effect of the filter screen on the shrinkage of the pouring metal liquid.

[0018] 3. The ductile iron casting equipment is provided with a feeding assembly of the gate cup body 3 and a separation component of the inner cup body and the outer cup body on the sand box transmission path. The sand box passes through the feeding assembly, the pouring tank body and the separation component in sequence, ensuring the gradual implementation of the installation step of the gate cup body before pouring and the separation step of the inner cup body and the outer cup body after pouring, thereby realizing continuous and automatic casting of the sand box. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 This is a schematic diagram of the overall structure of the ductile iron casting equipment; Figure 2 This is a structural diagram of the back of the ductile iron casting equipment; Figure 3 This is a structural diagram of the front side of the ductile iron casting equipment; Figure 4 This is a structural diagram of the pouring cup body of the ductile iron casting equipment; Figure 5 This is a structural diagram of the top of the pouring cup body of the ductile iron casting equipment; Figure 6 This is a structural diagram of the cross section of the pouring cup of the ductile iron casting equipment; Figure 7 This is a schematic diagram of the structure of the outer cup of the ductile iron casting equipment; Figure 8 This is a schematic diagram of the structure of the cup body in the ductile iron casting equipment; Figure 9 It is a structural diagram of the combination of the sand box and the pouring cup; Figure 10 Schematic diagram of the structure of the sand box; Figure 11 It is a schematic diagram of the cross-section structure when the sand box and the gate cup are combined; Figure 12 It is a schematic diagram of the structure of the gate cup during pouring.

[0020] In the figure: 1, first conveyor platform; 2, first conveyor base; 3, pouring cup; 4, sand box; 5, second conveyor base; 6, first clamping member; 7, second clamping member; 8, outer cup; 9, inner cup; 10, first functional cylinder; 11, first slide; 12, pouring tank; 13, second functional cylinder; 14, second slide; 15, first support frame; 16, second support frame; 17, third support frame; 18, second conveyor base; 19, second conveyor platform; 20, third conveyor platform; 21, fourth conveyor platform; 22, fourth conveyor base 101, first station; 102, second station; 103, third station; 104, fourth station; 105, fifth station; 41. Cavity; 42. Gate; 43. Sprue; 44. Runner; 61. First clamping plate; 62. Third functional cylinder; 63. First connecting seat; 71. Second clamping plate; 72. Fourth functional cylinder; 73. Second connecting seat; 74. Third connecting seat; 81. Limiting ring; 82. First coupling; 83. External extension tube; 84. External flow channel; 91. First filter screen; 92. Spiral protrusion; 93. Second filter screen; 94. Internal flow channel; 95. Internal extension tube; 96. Bracket; 97. Second coupling; 121. Discharge pipe. DETAILED DESCRIPTION

[0021] The technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments.

[0022] Reference Figure 1-2 A ductile iron casting device includes a first conveying platform 1, on which a first conveying track is provided, and on which a first conveying seat 2 is provided. The first conveying seat 2 is an electric conveying platform that can move along the first conveying track. The first conveying seat 2 is used to load the flask 4 to realize the conveyance of the flask 4 on the first conveying platform 1. A loading assembly and a pouring tank body 12 are sequentially provided on the conveying path of the first conveying platform 1, wherein the loading assembly is used to install the pouring cup body 3 on the pouring gate 42 of the flask 4, and the pouring tank body 12 is an insulated pouring tank. The pouring tank body 12 can contain molten metal inside, and the pouring tank body 12 is used to pour the molten metal into the flask 4.

[0023] refer to Figure 1-3 In this embodiment, the loading assembly is mounted on a first support frame 15. A first slide 11 is provided on the first support frame 15. The first slide 11 is slidably connected to the first support frame 15 in the second direction. The loading assembly includes a first clamping member 6 and a first functional cylinder 10. The axis of the first functional cylinder 10 is vertically arranged. The upper portion of the first functional cylinder 10 is fixedly connected to the first slide 11. The lower working end of the first functional cylinder 10 is fixedly connected to the first clamping member 6. The first functional cylinder 10 is used to drive the first clamping member 6 to move up and down.

[0024] Furthermore, the first clamping member 6 includes two first clamping plates 61, two third functional cylinders 62, and a first connecting seat 63. The first connecting seat 63 is fixedly connected to the working end of the first functional cylinder 10. The two third functional cylinders 62 are symmetrically arranged on the first connecting seat 63. The first ends of the third functional cylinders 62 are fixedly connected to the first connecting seat 63, and the second ends of the third functional cylinders 62 are fixedly connected to the first clamping plates 61. The axis of the third functional cylinder 62 is set horizontally, and the third functional cylinder 62 is used to drive the two first clamping plates 61 to move closer or apart, thereby clamping and releasing the top bracket 96 of the inner cup body 9.

[0025] The ductile iron casting equipment in this embodiment also includes a second conveyor platform 19, which is a chain conveyor belt. The second conveyor platform 19 is equipped with a second conveyor seat 5. The second conveyor seat 5 is used to carry the pouring cup body 3. The second conveyor platform 19 is used to convey the pouring cup body 3. The inner cup body 9 and the outer cup body 8 of the pouring cup body 3 on the second conveyor platform 19 are in a combined state. The conveying direction of the second conveyor platform 19 is the second direction, and the conveying direction of the first conveyor platform 1 is the first direction. The second direction is perpendicular to the first direction. The unloading end of the second conveyor platform 19 extends to the first support frame 15. The first support frame 15 is provided with a fifth functional cylinder (not shown) that drives the movement of the first slide 11 to realize the movement of the first slide 11 in the second direction. The first slide 11 can move with the first clamping member 6 between the gate 42 of the sand box 4 and the unloading end of the second conveying platform 19. The first clamping member 6 can clamp the gate cup body 3 on the second conveying platform 19 and send it to the gate 42 of the sand box 4, thereby realizing the loading of the gate cup body 3 into the sand box 4.

[0026] The pouring tank 12 in this embodiment is mounted on the second support frame 16. The pouring tank 12 contains molten metal and is located above the conveying path of the first conveyor platform 1. A discharge pipe 121 is provided at the bottom of the pouring tank 12. The discharge pipe 121 is equipped with an electrically controlled valve that controls the opening and closing of the discharge pipe 121, thereby discharging the molten metal. When the gate 42 of the flask 4 passes through the discharge pipe 121, the discharge pipe 121 opens, and the molten metal is poured into the gate cup 3.

[0027] refer to Figure 10 The flask 4 is provided with a cavity 41 inside, and a gate 42 is located on the top surface of the flask 4. The cavity 41 and the gate 42 are connected through a sprue 43 and a runner 44. The sprue 43 is directly connected to the bottom of the gate 42, and the sprue 43 and the runner 44 are perpendicular to each other. Figure 9 and Figure 11 The pouring cup body 3 can be inserted into the pouring gate 42, and the metal casting liquid enters the mold cavity 41 by pouring into the pouring cup body 3.

[0028] refer to Figure 4-Figure 8 The above-mentioned pouring cup body 3 includes an outer cup body 8 and an inner cup body 9 of similar shape. The outer cup body 8 and the inner cup body 9 can be combined or separated. The outer contour of the outer cup body 8 matches the inner contour of the gate 42 of the flask 4. When the pouring cup body 3 is installed in the flask 4, the outer cup body 8 is inserted into the gate 42 of the flask 4 and abuts against the gate 42 of the flask 4. A limit ring 81 is provided inside the outer cup body 8, and the limit ring 81 protrudes from the inner wall of the outer cup body 8. A first filter screen 91 is fixedly provided on the outside of the inner cup body 9. The first filter screen 91 is an annular ceramic filter screen, and the outer diameter of the first filter screen 91 matches the inner diameter of the outer cup body 8.

[0029] When the outer cup 8 and the inner cup 9 are combined, the inner cup 9 is located inside the outer cup 8, and the inner cup 9 is coaxially arranged with the outer cup 8. The limiting ring 81 inside the outer cup 8 is located below the first filter 91, and the limiting ring 81 can support the first filter 91 and limit the first filter 91.

[0030] Furthermore, the outer cup 8 is provided with two first coupling members 82, which are symmetrically fixed to the outer wall of the outer cup 8. The top of the inner cup 9 is provided with a bracket 96, which is provided with two second coupling members 97, which are symmetrically arranged. The second coupling members 97 are arranged in an L-shape. When the position of the second coupling member 97 corresponds to the position of the first coupling member 82, the bottom of the second coupling member 97 can extend below the first coupling member 82, thereby limiting the axial position of the outer cup 8 and the inner cup 9.

[0031] When outer cup 8 and inner cup 9 are combined, the top of outer cup 8 is higher than the top of inner cup 9. An outer extension tube 83 is provided at the bottom of outer cup 8, and an inner extension tube 95 is provided at the bottom of inner cup 9. The inner extension tube 95 is coaxial with the outer extension tube 83, and their bottom surfaces are located at the same horizontal plane. The inner extension tube 95 and the outer extension tube 83 can be inserted into the bottom of the sprue 43, respectively, to reduce direct impact of the molten metal on the sprue 43 during pouring.

[0032] refer to Figure 12 , an outer flow channel 84 is formed between the inner cup body 9 and the outer cup body 8, the horizontal cross section of the outer flow channel 84 is annular, and an inner flow channel 94 is formed inside the inner cup body 9. When pouring, refer to Figure 12 The molten metal is poured into the inner cup body 9, and the molten metal inside the inner cup body 9 is kept in a top overflow state. The overflowing molten metal enters the outer flow channel 84. Since the slag floats on the surface of the molten metal, the slag will diverge and flow to the outer flow channel 84, realizing the diversion of the molten metal and the slag, maintaining the purity of the molten metal inside the inner cup body 9, and maintaining the unobstructed channel of the inner flow channel 94. The first filter screen 91 can filter the molten metal inside the outer flow channel 84, and the slag is intercepted by the first filter screen 91. The filtered molten metal directly enters the cross runner 44 from the outer flow channel 84.

[0033] In this embodiment, the inner runner 94 serves as the primary runner, and the outer runner 84 serves as the auxiliary runner. The inner runner 94 is in a top overflow state, and the liquid level in the outer runner 84 is lower than that in the inner runner 94. When gas inside the flask 4 is discharged from the gate 42, because the liquid level in the outer runner 84 is lower than that in the inner runner 94, the liquid pressure in the outer runner 84 is lower than that in the inner runner 94. Therefore, the gas is more likely to be discharged within the outer runner 84, thereby reducing the splashing of molten metal caused by the rising gas during pouring from the inner runner 94. Because the outer runner 84 has a smaller space, liquid is less likely to splash when gas escapes, enhancing pouring safety.

[0034] In this embodiment, the inner wall of the inner cup body 9 is provided with a spiral protrusion 92, which is used to guide the molten metal when it flows downward. The molten metal generates a vortex inside the inner cup body 9, which is conducive to the slag inside the molten metal to float out in the middle of the inner cup body 9.

[0035] Furthermore, a second filter screen 93 can be fixedly provided at the bottom of the inner cup body 9 . The second filter screen 93 is a circular ceramic filter screen. The second filter screen 93 is used to filter the metal casting liquid inside the inner flow channel 94 to reduce the probability of slag entering the mold cavity 41 .

[0036] After pouring is completed, the outer cup body 8 is left inside the gate 42 of the sand box 4, which can separate the inner cup body 9 from the outer cup body 8. The inner cup body 9, the first filter screen 91 and the second filter screen 93 are pulled out from the inside of the outer cup body 8. The slag will follow the two filter screens to leave the gate 42, keeping the shrinkage feeding channel at the gate 42 of the sand box 4 unobstructed, which is conducive to shrinkage feeding.

[0037] The ductile iron casting equipment in this embodiment also includes a separation component, which is located on the conveying path of the first conveying platform 1, and the separation component is used to separate the inner cup body 9 from the outer cup body 8. The separation component is installed on the third support frame 17, and the third support frame 17 is provided with a second slide 14, and the second slide 14 is slidably connected to the third support frame 17 in the second direction. The separation component includes a second clamping member 7 and a second functional cylinder 13, and the second clamping member 7 is used to clamp the inner cup body 9 and realize the rotation of the inner cup body 9 relative to the outer cup body 8. The axis of the second functional cylinder 13 is vertically arranged, the upper part of the second functional cylinder 13 is fixedly connected to the second slide 14, and the lower working end of the second functional cylinder 13 is fixedly connected to the second clamping member 7, and the second functional cylinder 13 is used to drive the second clamping member 7 to move up and down.

[0038] Furthermore, the second clamping member 7 includes two second clamping plates 71, two fourth function cylinders 72, a second connecting seat 73 and a third connecting seat 74. The third connecting seat 74 is fixedly connected to the working end of the second function cylinder 13. The second connecting seat 73 is rotationally connected to the third connecting seat 74. The third connecting seat 74 is provided with a rotary motor (not shown) for driving the second connecting seat 73 to rotate. The two fourth function cylinders 72 are symmetrically arranged on the second connecting seat 73. The first end of the fourth function cylinder 72 is fixedly connected to the second connecting seat 73, and the second end of the fourth function cylinder 72 is fixedly connected to the second clamping plate 71. The axis of the fourth function cylinder 72 is arranged horizontally. The fourth function cylinder 72 is used to drive the two second clamping plates 71 to approach or separate, thereby clamping and releasing the top bracket 96 of the inner cup body 9. The rotary motor is used to drive the second connecting seat 73 to rotate, thereby realizing the rotation of the inner cup body 9 relative to the outer cup body 8.

[0039] The inner cup 9 rotates relative to the outer cup 8 to separate and contact the second engaging member 97 from the first engaging member 82. When the inner cup 9 is coupled to the outer cup 8, the second engaging member 97 contacts the first engaging member 82. When the inner cup 9 and the outer cup 8 need to be separated, the inner cup 9 is rotated relative to the outer cup 8, the second engaging member 97 separates from the first engaging member 82, and the inner cup 9 is then moved axially to achieve complete separation between the inner cup 9 and the outer cup 8.

[0040] The ductile iron casting equipment in this embodiment also includes a third conveyor 20, which is a chain conveyor belt and is equipped with a third conveyor base 18. The third conveyor base 18 is used to support the inner cup 9 and transport the inner cup 9. The third conveyor 20 conveys in the second direction, and the loading end of the third conveyor 20 extends to the third support frame 17. The third support frame 17 is equipped with a sixth functional cylinder (not shown) that drives the second slide 14 to move in the second direction. The second slide 14 can carry the second clamping member 7 to move between the gate 42 of the sand box 4 and the loading end of the third conveyor 20. The second clamping member 7 can clamp the inner cup body 9 of the gate cup body 3 on the sand box 4 and make the inner cup body 9 rotate relative to the outer cup body 8. The second functional cylinder 13 pulls the inner cup body 9 away from the outer cup body 8 to achieve separation between the inner cup body 9 and the outer cup body 8. The second slide 14 moves to send the inner cup body 9 on the second clamping member 7 to the loading end of the third conveyor 20 to achieve unloading of the inner cup body 9.

[0041] The ductile iron casting equipment in this embodiment also includes a fourth conveyor platform 21, which is provided with a second conveyor track extending in a second direction. A fourth conveyor seat 22 is provided on the second conveyor track. The fourth conveyor seat 22 is a motorized conveyor platform that can move along the second conveyor track. The fourth conveyor seat 22 is provided with a short track that can connect to the first conveyor track. When the fourth conveyor seat 22 moves to the unloading end of the first conveyor track, the first conveyor seat 2 can enter the short track of the fourth conveyor seat 22 from the first conveyor track of the first conveyor platform 1, completing the unloading of the flask 4. The fourth conveyor seat 22 is used to load the first conveyor seat 2, enabling the first conveyor seat 2 and the flask 4 to be transported on the fourth conveyor platform 21.

[0042] The first conveyor platform 1 is equipped with multiple workstations, and corresponding casting operations are performed at corresponding workstations. The workstations on the first conveyor platform 1 include the first workstation 101, the second workstation 102, the third workstation 103, the fourth workstation 104, and the fifth workstation 105. The first workstation 101 is a conveying workstation, used for conveying the flask 4; the second workstation 102 is a cup-loading workstation, used for installing the pouring cup body 3 on the pouring gate 42 of the flask 4; the third workstation 103 is a pouring workstation, used for injecting molten metal into the flask 4; the fourth workstation 104 is a cup-dropping workstation, used for removing the inner cup body 9 from the pouring gate 42 of the flask 4; and the fifth workstation 105 is a material removal workstation, used for unloading the flask 4 from the first conveyor platform 1.

[0043] The ductile iron casting equipment in this embodiment includes the following working process: Step 1: The flask 4 enters the first station 101 of the first conveyor 1, and the pouring cup 3 arrives at the unloading end of the second conveyor 19. At this time, the inner cup 9 and the outer cup 8 of the pouring cup 3 are in the assembled state; Step 2: The flask 4 enters the second station 102 of the first conveyor 1. The first slide 11 can move with the first clamping member 6. The first clamping member 6 clamps the pouring cup 3 at the discharge end of the second conveyor 19 and moves it above the gate 42 of the flask 4. The first functional cylinder 10 descends with the first clamping member 6. The pouring cup 3 is installed on the gate 42 of the flask 4, realizing the loading of the pouring cup 3 into the flask 4. Step 3: The flask 4 enters the third station 103 of the first conveyor 1. At this time, the gate 42 of the flask 4 is located below the discharge pipe 121. The discharge pipe 121 is opened, and the molten metal in the pouring tank 12 is poured at the pouring cup 3. When pouring, refer to Figure 12 , the molten metal is poured into the inner cup body 9, and the molten metal inside the inner cup body 9 is kept in a top overflow state, and the overflowing molten metal enters the outer runner 84. Since the slag floats on the surface of the molten metal, the slag will diverge and flow to the outer runner 84, so as to realize the diversion of the molten metal and the slag, maintain the purity of the molten metal inside the inner cup body 9, and at the same time maintain the unobstructed channel of the inner runner 94, the first filter screen 91 can filter the molten metal inside the outer runner 84, and the slag is intercepted by the first filter screen 91. The filtered molten metal directly enters the runner 44 from the outer runner 84; not only that, when the gas inside the sand box 4 is discharged from the gate 42, since the liquid level of the outer runner 84 is lower than that of the inner runner 94, the liquid pressure at the outer runner 84 is lower than that of the inner runner 94, and the probability of the gas being discharged inside the outer runner 84 is greater, which can reduce the splashing of the molten metal caused by the floating of the gas when pouring the inner runner 94; Step 4: The sand box 4 enters the fourth station 104 of the first conveyor 1, and the second slide 14 can move the second clamping piece 7 to above the gate 42 of the sand box 4. The second clamping piece 7 clamps the top bracket 96 of the inner cup body 9, and the rotary motor drives the second connecting seat 73 to rotate. The inner cup body 9 rotates relative to the outer cup body 8, and the second coupling piece 97 of the inner cup body 9 is separated from the first coupling piece 82 of the outer cup body 8. The second functional cylinder 13 lifts the second clamping piece 7, and the inner cup body 9 completely leaves the outer cup body 8. The inner cup body 9, the first filter screen 91 and the second filter screen 93 leave the outer cup body 8 together. The slag will follow the two filter screens to leave the gate 42, keeping the shrinkage feeding channel at the gate 42 of the sand box 4 unobstructed, which is conducive to shrinkage feeding. Then, the second slide 14 carries the inner cup body 9 on the second clamping piece 7 to the loading end of the third conveyor 20 to realize the unloading of the inner cup body 9; Step 5: The flask 4 enters the fifth station 105 of the first conveyor platform 1, and the fourth conveyor seat 22 moves to the unloading end of the first conveyor platform 1. The first conveyor seat 2 can enter the short track of the fourth conveyor seat 22 from the first conveyor track of the first conveyor platform 1 to complete the unloading of the flask 4. The fourth conveyor seat 22 can bring the flask 4 to the cooling area for cooling.

[0044] The above description is only a preferred specific embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any technician familiar with the technical field, within the technical scope disclosed by the present invention, who makes equivalent replacements or changes based on the technical solution and inventive concept of the present invention, should be covered by the scope of protection of the present invention.

Claims

1. A ductile iron casting device, comprising a first conveying platform (1) for conveying a sand box (4) and a pouring tank body (12), wherein the pouring tank body (12) is located above the conveying path of the first conveying platform (1), and the pouring tank body (12) pours molten metal at the pouring gate position of the sand box (4), and the pouring gate position of the sand box (4) is provided with a pouring cup body (3), characterized in that: The gate cup body (3) includes an outer cup body (8) and an inner cup body (9) that can be combined or separated. The outer contour of the outer cup body (8) matches the inner contour of the gate (42) of the sand box (4). When the outer cup body (8) is combined with the inner cup body (9), the inner cup body (9) is located inside the outer cup body (8) and is coaxially arranged with the outer cup body (8). The outer portion of the inner cup body (9) is fixedly provided with an annular first filter screen (91). The inner portion of the outer cup body (8) is provided with a limiting ring (81) for limiting the lower portion of the first filter screen (91). The outer portion of the outer cup body (8) is provided with a first coupling member (82). The top of the inner cup body (9) is provided with a bracket (96). The bracket (96) is provided with a second coupling member (97) for limiting the lower portion of the first coupling member (82). The top of the outer cup body (8) is higher than the top of the inner cup body (9), and an outer flow channel (84) with a ring-shaped horizontal cross section is formed between the inner cup body (9) and the outer cup body (8). The first filter screen (91) matches the horizontal cross section of the outer flow channel (84), and an inner flow channel (94) is formed inside the inner cup body (9); during pouring, the inner cup body (9) is combined with the outer cup body (8) to keep the metal casting liquid inside the inner cup body (9) in a top overflow state, and the overflowing metal casting liquid enters the mold cavity (41) of the sand box (4) from the outer flow channel (84); after pouring, the outer cup body (8) is left inside the gate (42) of the sand box (4), and the inner cup body (9) is separated from the outer cup body (8).

2. The ductile iron casting equipment according to claim 1, characterized in that: The inner wall of the inner cup body (9) is provided with a spiral protrusion (92).

3. The ductile iron casting equipment according to claim 2, characterized in that: A second filter screen (93) is provided at the bottom of the inner cup body (9).

4. The ductile iron casting equipment according to any one of claims 1 to 3, characterized in that: The inner cup body (9) realizes the separation and contact of the second combining member (97) and the first combining member (82) by rotating relative to the outer cup body (8); when the second combining member (97) is separated from the first combining member (82), the inner cup body (9) moves axially relative to the outer cup body (8) to realize the separation between the inner cup body (9) and the outer cup body (8).

5. The ductile iron casting equipment according to claim 4, characterized in that: The invention also includes a separation component for separating the inner cup body (9) from the outer cup body (8), wherein the separation component includes a second clamping member (7) and a second functional cylinder (13), wherein the axis of the second functional cylinder (13) is vertically arranged, and the second clamping member (7) is fixedly connected to the working end of the second functional cylinder (13), and the second clamping member (7) is used to clamp the inner cup body (9) and realize the rotation of the inner cup body (9) relative to the outer cup body (8).

6. The ductile iron casting equipment according to claim 5, characterized in that: The second clamping member (7) includes a second clamping plate (71), a fourth functional cylinder (72), a second connecting seat (73) and a third connecting seat (74), wherein the third connecting seat (74) is fixedly connected to the working end of the second functional cylinder (13), the second connecting seat (73) is rotatably connected to the third connecting seat (74), the two fourth functional cylinders (72) are symmetrically arranged on the second connecting seat (73), the first end of the fourth functional cylinder (72) is fixedly connected to the second connecting seat (73), the second end of the fourth functional cylinder (72) is fixedly connected to the second clamping plate (71), and the two second clamping plates (71) are brought close to or separated to achieve clamping and loosening of the top bracket (96) of the inner cup body (9).

7. The ductile iron casting equipment according to claim 6, characterized in that: The present invention also includes a loading assembly, which includes a first clamping member (6) and a first functional cylinder (10). The axis of the first functional cylinder (10) is vertically arranged, and the first clamping member (6) is fixedly connected to the working end of the first functional cylinder (10). The first clamping member (6) is used to clamp the inner cup body (9) to enable the gate cup body (3) to be installed on the gate (42) of the sand box (4).

8. The ductile iron casting equipment according to claim 7, characterized in that: The first clamping member (6) includes a first clamping plate (61), a third functional cylinder (62) and a first connecting seat (63), wherein the first connecting seat (63) is fixedly connected to the working end of the first functional cylinder (10), and the two third functional cylinders (62) are symmetrically arranged on the first connecting seat (63), wherein the first end of the third functional cylinder (62) is fixedly connected to the first connecting seat (63), and the second end of the third functional cylinder (62) is fixedly connected to the first clamping plate (61), and the two first clamping plates (61) are brought close to or separated to achieve clamping and loosening of the top bracket (96) of the inner cup body (9).

9. The ductile iron casting equipment according to claim 8, characterized in that: It also includes a second conveying platform (19), which is used to convey the pouring cup body (3), and the first clamping member (6) is used to clamp the pouring cup body (3) on the second conveying platform (19) and convey it to the pouring gate (42) of the sand box (4).

10. The ductile iron casting equipment according to claim 9, characterized in that: It also includes a third conveying platform (20), which is used to convey the inner cup body (9), and the second clamping member (7) is used to clamp the inner cup body (9) and convey it to the third conveying platform (20).

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