Novel centrifugal aluminum casting sprue bush

Abstract

The novel centrifugal aluminum casting sprue bush comprises a sprue bush body and a sand box feeding pipe, and the sprue bush body is composed of a sprue bush shell, an assembly type inner wall body, a filtering adjusting assembly and an upper pressing fixing ring; the assembly type inner wall body is arranged in the sprue bush shell, the filtering adjusting assembly is arranged at the upper end of the sprue bush shell, the upper pressing fixing ring is arranged at the upper end of the filtering adjusting assembly, and the sprue bush body is arranged at the upper end of a sand box feeding pipe. The vacuum cavity is formed in the sprue bush shell, the sprue bush body needs to be preheated before being used, and the vacuum cavity is arranged to effectively prevent heat from being quickly dissipated after preheating, so that moisture is efficiently removed, the service life is prolonged, and the influence of thermal shock and chilling on a die casting is avoided; and the assembly type sprue bush can adapt to production of castings made of different materials, and compared with an integral type, the assembly type sprue bush is easier to maintain and replace, so that the maintenance cost is reduced, and the production efficiency is improved.

Description

Technical Field

[0001] The invention belongs to the technical field of centrifugal casting, and in particular relates to a new type of centrifugal aluminum casting gate sleeve. Background Art

[0002] Centrifugal casting is a method of pouring molten metal into a high-speed rotating cavity and solidifying it under the action of centrifugal force to obtain a casting. It is often used to manufacture composite metal castings such as sleeves. In ordinary centrifugal casting methods, the filling of the mold cavity of the hollow mold is based on the rotation of the hollow mold around a rotation axis. Due to the rotation, during the process of pouring the liquid molten casting material, the corresponding centrifugal force acts on the casting material, thereby pressing the casting material into the mold cavity and ensuring complete filling.

[0003] During the on-site use of centrifugal aluminum casting, it is necessary to first pour the high-temperature molten aluminum directly into the gate sleeve and then into the casting mold. If the molten aluminum is not filtered to remove the bubbles, gray oxides and inclusions in the molten metal, it will increase the defects of air holes, slag holes, sand holes and other defects in the casting; traditional gate sleeves are generally one-piece integral structures, which are in contact with high-temperature molten metal for a long time. The inner wall of the gate sleeve is prone to inevitable damage. Once replaced, it needs to be replaced as a whole, resulting in material waste; after the traditional gate sleeve is preheated, if the molten metal cannot be poured into the mold in time, it will quickly cool down, thereby affecting the speed of the molten metal entering the mold and affecting the quality of the casting; therefore, a new gate sleeve for centrifugal aluminum casting is proposed. Summary of the invention

[0004] The purpose of the present invention is to provide a new type of centrifugal aluminum casting gate sleeve to solve the problem that the existing gate sleeves are generally an integral structure formed in one piece, and are in contact with high-temperature molten metal for a long time. The inner wall of the gate sleeve is prone to inevitable damage. Once replaced, the entire gate sleeve needs to be replaced, resulting in material waste; after preheating, if the molten metal cannot be poured into the mold in time, the traditional gate sleeve will quickly cool down, thereby affecting the speed at which the molten metal enters the mold and affecting the quality of the casting.

[0005] In order to solve the above technical problems, the present invention is achieved through the following technical solutions: The present invention discloses a novel centrifugal aluminum casting sprue sleeve, comprising a sprue sleeve body and a sand box feeding pipe, wherein the sprue sleeve body is composed of a sprue sleeve shell, an assembled inner wall body, a filter adjustment component and an upper pressure fixing ring; the assembled inner wall body is arranged inside the sprue sleeve shell, the filter adjustment component is arranged at the upper end of the sprue sleeve shell, the upper pressure fixing ring is arranged at the upper end of the filter adjustment component, and the sprue sleeve body is arranged at the upper end of the sand box feeding pipe; The sprue sleeve shell is a funnel-shaped structure with two bottom openings connected, a vacuum chamber is provided inside the sprue sleeve shell, an upper edge ring is fixed to the upper opening of the sprue sleeve shell, a lower edge ring is fixed to the lower opening of the sprue sleeve shell, a plurality of mounting grooves are provided on the sprue sleeve shell and the inner wall of the upper edge ring, the mounting grooves are "L"-shaped grooves, a plurality of protrusions are provided on the circumferential side of the upper edge ring, the protrusions are slidably connected with a connecting plate, the connecting plate is an "L"-shaped plate structure, a sliding groove and a fixing hole are provided on one surface of the connecting plate, the shape and size of the protrusions are adapted to the sliding groove, and the protrusions are slidably matched with the sliding groove; The assembled inner wall body is composed of six assembled inner walls, the assembled inner wall is an arc-shaped plate, a pressure strip is fixed on one side of the assembled inner wall, and a pressing groove is opened on the other side of the assembled inner wall. The shape and size of the pressing groove are adapted to the pressure strip, and two adjacent assembled inner walls are snap-fitted with the pressure strip through the pressing groove; a mounting strip is fixed on the outer arc surface of the assembled inner wall near the pressing groove, and the mounting strip is an "L"-shaped body structure, and the shape and size of the mounting strip are adapted to the mounting groove, and the mounting strip and the mounting groove are slidably matched; a pressing plate is fixed on the upper end of the assembled inner wall; The filter adjustment component is composed of a filter outer ring, a filter adjustment layer and a filter layer. The inner wall of the filter outer ring is provided with a receiving groove, and a side surface of the lower end of the receiving groove is provided with an adjustment groove. A compression spring is fixed to one side of the adjustment groove, and an extrusion block is fixed to one end of the compression spring. The filter adjustment layer and the filter layer are arranged in sequence in the receiving groove. The filter adjustment layer is composed of an outer ring and an inner filter plate. An annular groove is provided on the upper surface of the outer ring, and a plurality of fan-shaped holes are provided on the peripheral side of the outer ring. The fan-shaped holes are connected to the annular groove, and the peripheral side of the inner filter plate is provided with a plurality of fan-shaped holes. A plug hole corresponding to the fan-shaped hole is provided, and a guide plate is rotatably provided in the plug hole and the fan-shaped hole, a rotating shaft is fixed at both ends of the guide plate, a hinge column is fixed on the peripheral side of the rotating shaft close to the outer ring, and a hinge groove is provided on the peripheral side of the hinge column; a receiving ring is provided on the lower surface of the filter layer, and an annular groove is provided on the lower surface of the receiving ring, and a plurality of hinge frames are hinged in the annular groove, and the hinge frames and the hinge groove cooperate with each other, a plurality of second receiving blocks are provided on the peripheral side of the receiving ring, and a plurality of first receiving blocks are provided on the peripheral side of the outer ring; A pressure block is arranged on the lower surface of the upper pressure fixing ring, and the pressure block is adapted to the receiving groove. A connecting ear is arranged on the upper pressure fixing ring and the side surface of the sand box feeding pipe. A fixing plug hole is arranged on one surface of the connecting ear. A threaded hole is arranged on one side surface of the connecting ear of the upper pressure fixing ring. A fixing bolt is arranged in the threaded hole. A fixing screw rod is inserted in the fixing plug hole, and a fixing screw rod is arranged with a fastening nut.

[0006] Furthermore, an annular groove is provided on the lower surface of the filter outer ring, a movable groove is provided on the peripheral side of the filter outer ring, a spring is arranged in the movable groove, a limiting block is fixed at one end of the spring, a fixed frame is arranged on one side of the movable groove, a countersunk hole is provided on one surface of the fixed frame, a through hole is provided in the countersunk hole, a movable rod is interspersed in the countersunk hole and the through hole, an extrusion spring is sleeved on the peripheral side of the movable rod, one end of the extrusion spring is fixedly connected to a surface of the countersunk hole, and the other end of the extrusion spring is fixedly connected to one end of the movable rod.

[0007] Furthermore, the extrusion block cooperates with the first receiving block, the shape and size of the first receiving block are adapted to the receiving groove, and the first receiving block and the receiving groove are slidably matched.

[0008] Furthermore, the shape and size of the fixing frame are adapted to the connecting plate, and the shape and size of the fixing hole are adapted to the limiting block and the movable rod.

[0009] Furthermore, the shape and size of the second receiving block are adapted to the adjusting groove, and the second receiving block and the adjusting groove cooperate with each other.

[0010] Furthermore, the filter holes on the inner filter plate and the filter layer are adapted to each other, and the cross section of the filter adjustment component is perpendicular to the axis of the sprue sleeve body.

[0011] The present invention has the following beneficial effects: The present invention opens a vacuum chamber inside the outer shell of the sprue sleeve. During the centrifugal aluminum casting process, the sprue sleeve body needs to be preheated before use. The vacuum chamber is provided to effectively prevent the heat from dissipating quickly after preheating, thereby efficiently removing moisture, extending the service life, and avoiding the influence of thermal shock and quenching on the die casting.

[0012] The present invention provides an assembled inner wall body and realizes assembly through pressure strips and pressure grooves. The assembled design is convenient for cleaning blocked waste and meeting the requirements of frequent assembly and disassembly, which helps to reduce production preparation time and improve production efficiency. At the same time, when the assembled inner wall of the assembled inner wall body is damaged, it does not need to be replaced as a whole, but only the damaged parts need to be replaced selectively, thereby avoiding material waste.

[0013] The sprue sleeve body in the present invention is assembled by a sprue sleeve shell, an assembled inner wall body, a filter adjustment component and an upper pressure fixing ring. The centrifugal aluminum casting process has fewer restrictions on the use of materials, and the assembled sprue sleeve can adapt to the production of castings of different materials; the assembled sprue sleeve is easier to maintain and replace than the integral type, which helps to reduce maintenance costs and improve production efficiency.

[0014] The present invention comprises a filter outer ring, a filter adjustment layer and a filter layer through a filter adjustment component. The filter adjustment layer and the filter layer are provided firstly to effectively remove bubbles, gray oxides and inclusions in the molten metal, reduce defects such as air holes, slag holes and sand holes in the castings, and improve the yield rate; secondly to slow down the speed at which the molten aluminum enters the aluminum casting mold when the centrifugal speed is not stable, thereby improving the quality of the castings; finally, to avoid the situation where the molten aluminum in the sand box feed pipe is almost full, the flow rate of the molten aluminum and the rotation speed of the sand box feed pipe can be reduced, thereby reducing the opening of the filter adjustment layer and reducing the phenomenon of the molten aluminum splashing out.‌ Of course, any product implementing the present invention does not necessarily need to achieve all of the advantages described above at the same time. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the accompanying drawings required for describing the embodiments will be briefly introduced below. Obviously, the accompanying drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other accompanying drawings can be obtained based on these accompanying drawings without paying creative work.

[0016] Figure 1 It is a schematic diagram of the overall structure of a new type of sprue sleeve for centrifugal casting aluminum; Figure 2 It is a top view of a new type of sprue sleeve for centrifugal aluminum casting; Figure 3 for Figure 2 Middle AA section; Figure 4 for Figure 3 Enlarged view of part B; Figure 5 for Figure 3 Enlarged view of part C in the middle; Figure 6 It is a schematic diagram of the structure of the filter layer in the present invention; Figure 7 It is a structural schematic diagram of the filtering and adjusting layer in the present invention; Figure 8 It is a structural schematic diagram of the assembled inner wall body in the present invention; Fig. 9 It is a schematic diagram of the structure of the filtering outer ring in the present invention; Fig.10 It is a structural schematic diagram of the outer shell of the gate sleeve in the present invention; Fig.11 It is a schematic diagram of the structure of the upper pressure fixing ring in the present invention; Fig.12 It is a structural schematic diagram of the connecting plate in the present invention.

[0017] In the accompanying drawings, the components represented by the reference numerals are listed as follows: 1. Gate sleeve body; 2. Sand box feeding pipe; 101. Gate sleeve shell; 1011. Vacuum chamber; 1012. Upper edge ring; 1013. Mounting groove; 1014. Bump; 1015. Connecting plate; 1016. Slide groove; 1017. Fixing hole; 1018. Lower edge ring; 102. Assembled inner wall body; 1021. Assembled inner wall; 1022. Pressure strip; 1023. Pressure groove; 1024. Mounting strip; 1025. Pressure plate; 103. Filter adjustment component; 1031. Filter outer ring; 1032. Filter adjustment layer; 1033. Filter layer; 1034. Movable groove; 1035. Spring; 1036. Limit block; 1037. Fixing frame; 1038. Through hole; 1039. Movable rod; 1040, extrusion spring; 104, upper pressure fixing ring; 1041, pressure block; 1042, connecting ear; 1043, fixed plug hole; 1044, threaded hole; 1045, fixing bolt; 1046, fixing screw rod; 1047, fastening nut; 105, receiving groove; 1051, adjusting groove; 1052, compression spring; 1053, extrusion block; 1054, outer ring; 1055, inner filter plate; 1056, annular groove; 1057, fan-shaped hole; 1058, guide plate; 1059, rotating shaft; 1060, hinged column; 1061, hinged groove; 1062, receiving ring; 1063, annular groove; 1064, hinged frame; 1065, second receiving block; 1066, first receiving block. DETAILED DESCRIPTION

[0018] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0019] In the description of the present invention, it should be understood that the terms "upper", "middle", "outer", "inner" and the like indicating directions or positional relationships are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the components or elements referred to must have a specific direction, be constructed and operated in a specific direction, and therefore should not be understood as limiting the present invention.

[0020] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "provided with", "connected", etc. should be understood in a broad sense. For example, "connected" 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.

[0021] See also Figure 1-Figure 5 As shown, the present invention is a new type of centrifugal aluminum casting gate sleeve, including a gate sleeve body 1 and a sand box feeding pipe 2, the gate sleeve body 1 is composed of a gate sleeve shell 101, an assembled inner wall body 102, a filter adjustment component 103 and an upper pressure fixing ring 104; the assembled inner wall body 102 is arranged inside the gate sleeve shell 101, the filter adjustment component 103 is arranged at the upper end of the gate sleeve shell 101, the upper pressure fixing ring 104 is arranged at the upper end of the filter adjustment component 103, and the gate sleeve body 1 is arranged at the upper end of the sand box feeding pipe 2; like Fig.10 and Fig.12 As shown, the sprue sleeve shell 101 is a funnel-shaped structure with two bottom openings connected. A vacuum chamber 1011 is provided inside the sprue sleeve shell 101. In the process of centrifugal aluminum casting, the sprue sleeve body 1 needs to be preheated before use. The vacuum chamber 1011 is provided after preheating to effectively prevent the heat from dissipating quickly, so as to remove moisture, extend the service life, and avoid the influence of thermal shock and quenching on the die casting. An upper edge ring 1012 is fixed to the upper opening of the sprue sleeve shell 101, and a lower edge ring 1018 is fixed to the lower opening of the sprue sleeve shell 101. The mouthpiece housing 101 and the inner wall of the upper ring 1012 are provided with a plurality of mounting grooves 1013, which are "L"-shaped grooves. The upper ring 1012 is provided with a plurality of protrusions 1014 on the circumferential side. The protrusions 1014 are slidably connected with a connecting plate 1015, which is an "L"-shaped plate structure. A sliding groove 1016 and a fixing hole 1017 are provided on one surface of the connecting plate 1015. The shape and size of the protrusions 1014 are adapted to the sliding groove 1016, and the protrusions 1014 and the sliding groove 1016 are slidably matched. like Figure 8As shown, the assembled inner wall body 102 is composed of six assembled inner walls 1021, and the assembled inner wall 1021 is an arc-shaped plate. A pressure strip 1022 is fixed on one side of the assembled inner wall 1021, and a pressing groove 1023 is opened on the other side of the assembled inner wall 1021. The shape and size of the pressing groove 1023 are adapted to the pressure strip 1022. Two adjacent assembled inner walls 1021 are snap-fitted with the pressure strip 1022 through the pressing groove 1023; the outer arc surface of the assembled inner wall 1021 near the pressing groove 1023 is fixed with a mounting strip 1024, and the mounting strip 1024 is " The L"-shaped body structure, the shape and size of the mounting strip 1024 are adapted to the mounting groove 1013, and the mounting strip 1024 and the mounting groove 1013 are slidably matched; a pressing plate 1025 is fixed to the upper end of the assembly inner wall 1021; by setting the assembled inner wall body 102, the assembly is achieved through the pressing strip 1022 and the pressing groove 1023, and the mounting strip 1024 and the mounting groove 1013 are assembled at the same time. The assembled design is convenient for cleaning blocked waste and meeting the requirements of frequent assembly and disassembly, which helps to reduce production preparation time and improve production efficiency.

[0022] like Figure 6 , Figure 7 and Fig. 9As shown, the filter adjustment component 103 is composed of a filter outer ring 1031, a filter adjustment layer 1032 and a filter layer 1033. The filter layer 1033 is provided to filter impurities in high-temperature aluminum water. In order to improve the filtering effect; the inner wall of the filter outer ring 1031 is provided with a receiving groove 105, and a side surface of the lower end of the receiving groove 105 is provided with an adjustment groove 1051. A compression spring 1052 is fixed to one side of the adjustment groove 1051, and an extrusion block 1053 is fixed to one end of the compression spring 1052; the filter adjustment layer 1032 is provided in sequence in the receiving groove 105. 32 and filter layer 1033, the filter adjustment layer 1032 is composed of an outer ring 1054 and an inner filter plate 1055, the inner filter plate 1055 is adapted to the filter hole on the filter layer 1033, and the cross section of the filter adjustment component 103 is perpendicular to the axis of the gate sleeve body 1; an annular groove 1056 is provided on the upper surface of the outer ring 1054, a plurality of fan-shaped holes 1057 are provided on the side surface of the outer ring 1054, the fan-shaped holes 1057 are connected to the annular groove 1056, and a plug hole corresponding to the fan-shaped hole 1057 is provided on the side surface of the inner filter plate 1055 A guide plate 1058 is rotatably arranged in the jack and the fan-shaped hole 1057, and a rotating shaft 1059 is fixed at both ends of the guide plate 1058. A hinge column 1060 is fixed on the side of the rotating shaft 1059 near the outer ring 1054, and a hinge groove 1061 is provided on the side of the hinge column 1060; a receiving ring 1062 is provided on the lower surface of the filter layer 1033, and an annular groove 1063 is provided on the lower surface of the receiving ring 1062. A plurality of hinge frames 1064 are hinged in the annular groove 1063, and the hinge frames 1064 and the hinge grooves 1061 are mutually connected. The receiving ring 1062 is provided with a plurality of second receiving blocks 1065 on the side surface thereof, and the shape and size of the second receiving blocks 1065 are adapted to the adjusting groove 1051, and the second receiving blocks 1065 and the adjusting groove 1051 cooperate with each other; the outer ring 1054 is provided with a plurality of first receiving blocks 1066 on the side surface thereof, and the extrusion block 1053 cooperates with the first receiving blocks 1066, and the shape and size of the first receiving blocks 1066 are adapted to the receiving groove 105, and the first receiving blocks 1066 and the receiving groove 105 are slidably matched; like Fig.11 As shown, a pressure block 1041 is provided on the lower surface of the upper pressure fixing ring 104, and the pressure block 1041 is adapted to the receiving groove 105. Connecting ears 1042 are provided on the sides of the upper pressure fixing ring 104 and the sand box feeding pipe 2 weeks ago. A fixing hole 1043 is provided on one surface of the connecting ear 1042. A threaded hole 1044 is provided on one side of the connecting ear 1042 of the upper pressure fixing ring 104. A fixing bolt 1045 is provided in the threaded hole 1044. A fixing screw rod 1046 is inserted in the fixing hole 1043, and a fastening nut 1047 is provided on the fixing screw rod 1046.

[0023] Among them, an annular groove is provided on the lower surface of the filter outer ring 1031, and a movable groove 1034 is provided on the side surface of the filter outer ring 1031. A spring 1035 is arranged in the movable groove 1034, and a limiting block 1036 is fixed at one end of the spring 1035. A fixed frame 1037 is arranged on one side of the movable groove 1034. A countersunk hole is provided on one surface of the fixed frame 1037, and a through hole 1038 is provided in the countersunk hole. A movable rod 1039 is interspersed in the countersunk hole and the through hole 1038. An extrusion spring 1040 is sleeved on the side surface of the movable rod 1039, and one end of the extrusion spring 1040 is fixedly connected to a surface of the countersunk hole, and the other end of the extrusion spring 1040 is fixedly connected to one end of the movable rod 1039.

[0024] The shape and size of the fixing frame 1037 are adapted to the connecting plate 1015 , and the shape and size of the fixing hole 1017 are adapted to the limiting block 1036 and the movable rod 1039 .

[0025] See also Figure 1-Figure 12 As shown, this embodiment is an assembly method of a new type of centrifugal cast aluminum sprue sleeve: during assembly, first slide the mounting strips 1024 of the assembly inner wall 1021 one by one along the mounting groove 1013, at this time, two adjacent assembly inner walls 1021 are clamped and matched with the pressure strips 1022 through the pressure groove 1023, so as to form an assembled inner wall body 102, and the pressure plates 1025 on the assembly inner wall 1021 are all pressed on the upper edge ring 1012, and then the filter outer ring 1031 is placed above the upper edge ring 1012 and the pressure plate 1025, and the connecting plate 1015 is pushed upward to insert the upper end of the connecting plate 1015 into the fixing frame 1037, and the limiting block 1036 is inserted into the fixing hole 1017 to align the sprue sleeve shell 101 with the filter. The adjustment component 103 is fixedly assembled, and then the first receiving block 1066 and the second receiving block 1065 of the filter adjustment layer 1032 and the filter layer 1033 are installed into the filter outer ring 1031 along the receiving groove 105, and then the pressure block 1041 of the upper pressure fixing ring 104 is also inserted into the receiving groove 105 to limit the filter adjustment layer 1032 and the filter layer 1033 to prevent the filter adjustment layer 1032 and the filter layer 1033 from separating during centrifugal movement. After the sprue sleeve body 1 is assembled, the fixing screw 1046 is passed through the upper pressure fixing ring 104 and the connecting ear 1042 of the sand box feeding pipe 2, and then fixed by tightening the nut 1047 and the fixing bolt 1045.

[0026] It should be further explained that among the six assembly inner walls 1021 , the pressing plate 1025 of one of the assembly inner walls 1021 has a notch to facilitate the insertion of the pressing strip 1022 of the last assembly inner wall 1021 into the pressing groove 1023 of the initial assembly inner wall 1021 .

[0027] See also Figure 1-Figure 12As shown, this embodiment is a method for using a new type of centrifugal aluminum casting gate sleeve: when using, first pour the high-temperature aluminum water from the middle into the preheated gate sleeve body 1, and filter the impurities in the high-temperature aluminum water through the filter layer 1033 to improve the quality of the cast aluminum; in the initial state, the inner filter plate 1055 and the filter holes on the filter layer 1033 are misaligned, and the aluminum water passes through the filter layer 1033 and falls onto the inner filter plate 1055 of the filter adjustment layer 1032, while performing secondary filtration on the aluminum water, slowing down the speed of the aluminum water entering the casting mold, avoiding the aluminum water from entering too early when the centrifugal speed is not stable and affecting the casting quality, and at the same time, the guide plate 1058 is used to control the aluminum water to enter the casting mold. The guide plate 1058 is guided to avoid splashing. When the centrifugal speed is stable, the centrifugal movement of the filter adjustment layer 1032 causes the first receiving block 1066 to push the extrusion block 1053, so that the first receiving block 1066 slides into the adjustment groove 1051. At this time, the rotating shaft 1059 and the hinge column 1060 rotate under this action, so that the guide plate 1058 remains in a vertical state. At this time, the filter holes on the inner filter plate 1055 and the filter layer 1033 coincide with each other, thereby increasing the flow rate of the molten aluminum. When it is about to end, the centrifugal speed decreases, and the guide plate 1058 returns to its initial state under the action of the compression spring 1052. At this time, the cast aluminum water is prevented from splashing out of the gate sleeve.

[0028] In the description of this specification, the description with reference to the terms "one embodiment", "example", "specific example", etc. means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the schematic representation of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or examples in a suitable manner.

[0029] The preferred embodiments of the present invention disclosed above are only used to help explain the present invention. The preferred embodiments do not describe all the details in detail, nor do they limit the invention to the specific implementation methods described. Obviously, many modifications and changes can be made according to the content of this specification. This specification selects and specifically describes these embodiments in order to better explain the principles and practical applications of the present invention, so that those skilled in the art can understand and use the present invention well. The present invention is limited only by the claims and their full scope and equivalents.

Claims

1. A new type of centrifugal aluminum casting sprue bushing, comprising a sprue bushing body (1) and a sand box feed pipe (2), characterized in that: The sprue sleeve body (1) is composed of a sprue sleeve outer shell (101), an assembled inner wall body (102), a filter adjustment component (103) and an upper pressure fixing ring (104); the assembled inner wall body (102) is arranged inside the sprue sleeve outer shell (101), the filter adjustment component (103) is arranged at the upper end of the sprue sleeve outer shell (101), the upper pressure fixing ring (104) is arranged at the upper end of the filter adjustment component (103), and the sprue sleeve body (1) is arranged at the upper end of the sand box feed pipe (2); The sprue sleeve shell (101) is a funnel-shaped structure with two bottom openings connected to each other. A vacuum chamber (1011) is provided inside the sprue sleeve shell (101). An upper edge ring (1012) is fixed to the upper opening of the sprue sleeve shell (101). A lower edge ring (1018) is fixed to the lower opening of the sprue sleeve shell (101). The sprue sleeve shell (101) and the inner wall of the upper edge ring (1012) are provided with a plurality of mounting grooves (1013). The mounting grooves (1013) are "L"-shaped grooves. A plurality of protrusions (1014) are provided on the peripheral side of the upper edge ring (1012). The protrusions (1014) are slidably connected to a connecting plate (1015). The connecting plate (1015) is an "L"-shaped plate structure. A sliding groove (1016) and a fixing hole (1017) are provided on one surface of the connecting plate (1015). The assembled inner wall body (102) is composed of six assembled inner walls (1021), wherein the assembled inner wall (1021) is an arc-shaped plate, a pressure strip (1022) is fixed to one side of the assembled inner wall (1021), a pressing groove (1023) is provided on the other side of the assembled inner wall (1021), a mounting strip (1024) is fixed to the outer arc surface of the assembled inner wall (1021) near the pressing groove (1023), and a pressing plate (1025) is fixed to the upper end of the assembled inner wall (1021); The filter adjustment component (103) is composed of a filter outer ring (1031), a filter adjustment layer (1032) and a filter layer (1033); a receiving groove (105) is provided on the inner wall of the filter outer ring (1031); an adjustment groove (1051) is provided on a side surface at the lower end of the receiving groove (105); a compression spring (1052) is fixed to one side surface of the adjustment groove (1051); and an extrusion block (1053) is fixed to one end of the compression spring (1052); A filter adjustment layer (1032) and a filter layer (1033) are sequentially arranged in the receiving groove (105); the filter adjustment layer (1032) is composed of an outer ring (1054) and an inner filter plate (1055); an annular groove (1056) is provided on the upper surface of the outer ring (1054); a plurality of fan-shaped holes (1057) are provided on the peripheral side surface of the outer ring (1054); the fan-shaped holes (1057) are connected to the annular groove (1056); and the inner filter plate (1055) is provided with a plurality of fan-shaped holes (1057). A plug hole corresponding to the fan-shaped hole (1057) is provided on the peripheral side of the filter layer (1033), a guide plate (1058) is rotatably provided in the plug hole and the fan-shaped hole (1057), a rotating shaft (1059) is fixed at both ends of the guide plate (1058), a hinge column (1060) is fixed on the peripheral side of the rotating shaft (1059) close to the outer ring (1054), and a hinge groove (1061) is provided on the peripheral side of the hinge column (1060); the filter layer (1033) is provided with a hinge groove (1061) on the peripheral side of the filter layer (103 ... fan-shaped hole (1057); the filter layer (1033) is provided with a hinge groove (1061) on the peripheral side of the fan-shaped hole (1057); the filter layer (1033 A receiving ring (1062) is provided on the surface, an annular groove (1063) is provided on the lower surface of the receiving ring (1062), a plurality of hinge frames (1064) are hinged in the annular groove (1063), the hinge frames (1064) and the hinge groove (1061) cooperate with each other, a plurality of second receiving blocks (1065) are provided on the peripheral side surface of the receiving ring (1062), and a plurality of first receiving blocks (1066) are provided on the peripheral side surface of the outer ring (1054); A pressure block (1041) is arranged on the lower surface of the upper pressure fixing ring (104), and the pressure block (1041) is adapted to the receiving groove (105). A connecting ear (1042) is arranged on the side surface of the upper pressure fixing ring (104) and the sand box feeding pipe (2). A fixing hole (1043) is provided on one surface of the connecting ear (1042). A threaded hole (1044) is provided on one side surface of the connecting ear (1042) of the upper pressure fixing ring (104). A fixing bolt (1045) is arranged in the threaded hole (1044). A fixing screw rod (1046) is inserted in the fixing hole (1043), and a fixing screw rod (1046) is provided with a fastening nut (1047).

2. A new type of centrifugal casting aluminum sprue sleeve according to claim 1, characterized in that: The shape and size of the protrusion (1014) are compatible with the slide groove (1016), and the protrusion (1014) and the slide groove (1016) are in sliding fit.

3. A new type of centrifugal aluminum casting sprue sleeve according to claim 1, characterized in that: The mounting bar (1024) is an "L"-shaped main body structure; the shape and size of the mounting bar (1024) are compatible with the mounting groove (1013); the mounting bar (1024) and the mounting groove (1013) are slidably matched.

4. A new type of centrifugal casting aluminum sprue sleeve according to claim 1, characterized in that: The shape and size of the pressing groove (1023) are compatible with the pressing strip (1022), and two adjacent assembly inner walls (1021) are snap-fitted with the pressing strip (1022) via the pressing groove (1023).

5. The novel centrifugal aluminum casting sprue bushing according to claim 1 is characterized in that: An annular groove is provided on the lower surface of the filter outer ring (1031), and a movable groove (1034) is provided on the peripheral side of the filter outer ring (1031). A spring (1035) is arranged in the movable groove (1034), and a limiting block (1036) is fixed at one end of the spring (1035). A fixing frame (1037) is arranged on one side of the movable groove (1034). A countersunk hole is provided on one surface of the fixing frame (1037), and a through hole (1038) is provided in the countersunk hole. A movable rod (1039) is inserted through the countersunk hole and the through hole (1038). An extrusion spring (1040) is sleeved on the peripheral side of the movable rod (1039), and one end of the extrusion spring (1040) is fixedly connected to a surface of the countersunk hole, and the other end of the extrusion spring (1040) is fixedly connected to one end of the movable rod (1039).

6. A new type of centrifugal aluminum casting sprue sleeve according to claim 1, characterized in that: The extrusion block (1053) cooperates with the first receiving block (1066); the shape and size of the first receiving block (1066) are adapted to the receiving groove (105); the first receiving block (1066) and the receiving groove (105) are slidably matched.

7. A new type of centrifugal aluminum casting sprue sleeve according to claim 5, characterized in that: The shape and size of the fixing frame (1037) are compatible with the connecting plate (1015), and the shape and size of the fixing hole (1017) are compatible with the limiting block (1036) and the movable rod (1039).

8. The novel centrifugal aluminum casting sprue bushing according to claim 1 is characterized in that: The shape and size of the second receiving block (1065) are compatible with the adjustment groove (1051), and the second receiving block (1065) and the adjustment groove (1051) cooperate with each other.

9. The novel centrifugal aluminum casting sprue bushing according to claim 1, characterized in that: The inner filter plate (1055) is adapted to the filter holes on the filter layer (1033), and the cross section of the filter adjustment component (103) is perpendicular to the axis of the sprue sleeve body (1).

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