Low-pressure die for spoke with deep concave structure

Abstract

The utility model relates to a low-pressure die for a spoke with a deep concave structure, and relates to the field of wheel machining. The low-pressure mold for the spoke with the deep concave structure comprises an upper mold assembly, a lower mold assembly, a sprue assembly and a demolding assembly, the upper die assembly and the lower die assembly are detachably connected to form a casting cavity, and the upper die assembly is located above the lower die assembly. The sprue assembly is detachably connected with the lower die assembly and communicates with the casting cavity. The demolding assembly is detachably and movably connected with the upper mold assembly, and the demolding assembly is located above the upper mold assembly; the upper die assembly comprises an upper die core, a first upper die, a second upper die, a sprue spreader, a first upper die plate, a second upper die plate, a first side die and a second side die. The sprue spreader is arranged in the middle of the upper mold core, located in the casting cavity and opposite to the sprue assembly. The first upper die and the second upper die are detachably connected with the two ends of the upper die core correspondingly. The first upper die plate is detachably connected with the first upper die, and the second upper die plate is detachably connected with the second upper die. The first side die is detachably connected with the first upper die and the lower die assembly, and the second side die is detachably connected with the second upper die and the lower die assembly. The second upper mold plate is detachably and movably connected with the demolding assembly; and the first upper die and the second upper die are V-shaped. By optimizing the mold structure and adjusting the casting size structure, the overall casting time is shortened, the cost is reduced, the phenomena of shrinkage porosity, shrinkage cavity and the like are avoided, and the test requirements of wheel impact, dynamic bending, dynamic radial fatigue and the like are well met.

Description

Technical Field

[0001] The utility model belongs to the field of wheel processing, and in particular relates to a low-pressure die for spokes with a deep concave structure. Background Art

[0002] The operating principle of a standard low-pressure wheel die is that liquid metal gradually enters the wheel hub molding cavity under the influence of compressed air pressure until it is cast into shape. This is primarily used for standard aluminum alloy wheels with relatively flat structures. However, for aluminum alloy wheels with deep concave structures and low ET values, filling and shrinkage are difficult, resulting in severe defects such as shrinkage porosity and shrinkage cavities at the R corners, making them unable to meet the requirements of 13° impact, dynamic bending, and dynamic radial fatigue tests.

[0003] Therefore, a low-pressure mold for spokes with a deep concave structure is designed. By optimizing the mold structure and adjusting the casting size structure, the casting time and cost are reduced as a whole, and shrinkage and shrinkage cavities are not produced. It meets the test requirements of wheel impact, dynamic bending, dynamic radial fatigue, etc. Utility Model Content

[0004] Based on this, the utility model aims to overcome the defects of the prior art and provide a low-pressure mold for spokes with a deep concave structure. A casting cavity is formed by an upper mold assembly and a lower mold assembly, and the casting cavity is filled and molded by a gate assembly. Only the spoke part is cast, and there is no need to cast the rim. It can optimize the mold structure and adjust the casting size structure to reduce the casting time and cost as a whole, without causing shrinkage, shrinkage holes and other phenomena, and can well meet the test requirements of wheel impact, dynamic bending, dynamic radial fatigue and other tests.

[0005] The first technical solution provided by this utility model:

[0006] A low-pressure mold for a spoke with a deep concave structure includes an upper mold assembly, a lower mold assembly, a gate assembly, and a demoulding assembly; the upper mold assembly is detachably connected to the lower mold assembly to form a casting cavity, and the upper mold assembly is located above the lower mold assembly; the gate assembly is detachably connected to the lower mold assembly and communicates with the casting cavity; the demoulding assembly is detachably and movably connected to the upper mold assembly, and the demoulding assembly is located above the upper mold assembly;

[0007] The upper mold assembly includes an upper mold core, a first upper mold, a second upper mold, a diverter cone, a first upper mold plate, a second upper mold plate, a first side mold, and a second side mold; the diverter cone is arranged in the middle of the upper mold core, and is located in the casting cavity, and is opposite to the gate assembly; the first upper mold and the second upper mold are respectively detachably connected to the two ends of the upper mold core; the first upper mold plate is detachably connected to the first upper mold, and the second upper mold plate is detachably connected to the second upper mold; the first side mold is detachably connected to the first upper mold and the lower mold assembly, and the second side mold is detachably connected to the second upper mold and the lower mold assembly; the second upper mold plate is detachably and movably connected to the demoulding assembly; the first upper mold and the second upper mold are V-shaped.

[0008] Furthermore, the demolding assembly includes an upper top plate, a mounting plate, a first push rod, a second push rod, and a guide column and guide sleeve; the upper top plate is detachably connected to the mounting plate; one end of the first push rod is detachably connected to the mounting plate, and the end of the first push rod away from the mounting plate is detachably connected to the upper mold core; one end of the second push rod is detachably connected to the mounting plate, and the end of the second push rod away from the mounting plate is detachably connected to the second upper mold and the second upper mold; one end of the guide column and guide sleeve is connected to the mounting plate, and the end of the guide column and guide sleeve away from the mounting plate is detachably connected to the second upper mold.

[0009] Furthermore, the lower mold assembly includes a first lower mold, a second lower mold, and a lower mold base; the first lower mold is detachably connected to the lower mold base and is detachably connected to the first side mold; the first lower mold is detachably connected to the lower mold base and is detachably connected to the first side mold; the gate assembly is detachably arranged on the lower mold base and is connected to the first lower mold and the second lower mold.

[0010] Furthermore, the gate assembly includes a thermos cup, a gate sleeve, and a filter ring; one end of the thermos cup is detachably connected to the lower mold base, and the end of the thermos cup away from the lower mold base is connected to the gate sleeve; the gate sleeve is respectively connected to the first lower mold and the second lower mold; the filter ring is connected to the gate sleeve and is located in the casting cavity; the filter ring is located above the gate sleeve.

[0011] Furthermore, the center lines of the thermos cup, the sprue sleeve, the filter ring and the diverter cone are consistent; the thermos cup is in a truncated cone shape; and the filter ring is in a truncated cone shape.

[0012] Furthermore, the upper mold assembly also includes a first thermal insulation layer and a second thermal insulation layer. The first thermal insulation layer covers the first upper mold, and the second thermal insulation layer covers the second upper mold.

[0013] Furthermore, the lower mold assembly also includes a third thermal insulation layer and a fourth thermal insulation layer. The third thermal insulation layer covers the first lower mold, and the fourth thermal insulation layer covers the second lower mold.

[0014] Furthermore, it also includes a first air duct cooling group and a second air duct cooling group; the first air duct cooling group is arranged on the first upper mold plate, and is connected in series with the upper mold core, the first insulation layer, the second insulation layer, the first side mold, and the second side mold; the second air duct cooling group is arranged on the lower mold base, and is connected in series with the third insulation layer and the fourth insulation layer; the first air duct cooling group is provided with at least eight groups of air holes, and the second air duct cooling group is provided with at least seven groups of air holes.

[0015] Furthermore, it also includes a support member, one end of the support member is arranged on the lower mold base, and the end of the support member away from the lower mold base is detachably connected to the second upper mold plate, and the support member is concave in shape.

[0016] Furthermore, it also includes a mold connecting plate, which is detachably connected to the first upper template and is in a concave shape.

[0017] The beneficial effects of the present invention are:

[0018] The upper mold core, first upper mold, second upper mold, first side mold, and second side mold of the upper mold assembly, along with the first and second lower molds of the lower mold assembly, form a casting cavity. Liquid metal flows through a thermos cup, sprue sleeve, filter ring, and diverter cone before filling and molding the casting cavity. The cast product is cooled by the first and second air duct cooling groups. Casting only the spokes, without the rim, reduces casting time and costs by optimizing the mold structure and adjusting the casting dimensions. Shrinkage and cavitation are eliminated, effectively meeting the requirements of wheel impact, dynamic bending, and dynamic radial fatigue tests. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 This is a structural schematic diagram of a low-pressure mold for a spoke with a deep concave structure according to an embodiment of the present utility model.

[0020] Description of reference numerals:

[0021] 1. Upper mold assembly; 11. Casting cavity; 12. Upper mold core; 13. First upper mold; 14. Second upper mold; 15. Diverter cone; 16. First upper mold plate; 161. First insulation layer; 162. Second insulation layer; 17. Second upper mold plate; 18. First side mold; 19. Second side mold; 2. Lower mold assembly; 21. First lower mold; 22. Second lower mold; 23. Lower mold base; 24. Third insulation layer; 25. Fourth insulation layer; 3. Gate assembly; 31. Thermos cup; 32. Gate sleeve; 33. Filter ring; 4. Demolding assembly; 41. Upper top plate; 42. Mounting plate; 43. First ejector pin; 44. Second ejector pin; 45. Guide column and guide sleeve; 5. First duct cooling group; 6. Second duct cooling group; 7. Support member; 8. Mold connecting plate. DETAILED DESCRIPTION

[0022] To make the objectives, technical solutions, and advantages of the embodiments of the present application more clear, the technical solutions in the embodiments of the present application will be clearly and completely described below in conjunction with the accompanying drawings of the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, not all of the embodiments. Generally, the components of the embodiments of the present application described and shown in the drawings herein can be arranged and designed in various different configurations.

[0023] Therefore, the following detailed description of the embodiments of the present application provided in the accompanying drawings is not intended to limit the scope of the present application for protection, but merely represents selected embodiments of the present application. All other embodiments obtained by persons of ordinary skill in the art based on the embodiments in the present application without creative work are within the scope of protection of the present application.

[0024] It should be noted that similar reference numerals and letters denote similar items in the following drawings, and therefore, once an item is defined in one drawing, it does not need to be further defined or explained in subsequent drawings.

[0025] In the description of the embodiments of the present application, it should be understood that the terms "center", "up", "down", "left", "right", "vertical", "horizontal", "inside", "outside", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, or are the orientations or positional relationships in which the product of the application is conventionally placed when in use, or are the orientations or positional relationships conventionally understood by those skilled in the art. They are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present application.

[0026] In the description of the embodiments of this application, it should also be noted that, unless otherwise expressly specified or limited, the terms "disposed," "installed," "connected," and "connected" should be understood in a broad sense. For example, they can refer to fixed connections, detachable connections, or integral connections; they can refer to direct connections, indirect connections through an intermediate medium, or internal connections between two components. Those skilled in the art will understand the specific meanings of the above terms in this application based on the specific circumstances.

[0027] It should be noted that, unless there is any conflict, the embodiments and features in the embodiments of this application can be combined with each other.

[0028] The technical solution in this application will be described below with reference to the accompanying drawings.

[0029] Please refer to Figure 1 An embodiment of the present application provides a deep concave structure spoke low-pressure mold, including an upper mold assembly 1, a lower mold assembly 2, a gate assembly 3, and a demolding assembly 4; the upper mold assembly 1 is detachably connected to the lower mold assembly 2 to form a casting cavity 11, and the upper mold assembly 1 is located above the lower mold assembly 2; the gate assembly 3 is detachably connected to the lower mold assembly 2 and is connected to the casting cavity 11; the demolding assembly 4 is detachably and movably connected to the upper mold assembly 1, and the demolding assembly 4 is located above the upper mold assembly 1.

[0030] The following is a detailed description of each substructure:

[0031] The upper mold assembly 1 includes an upper mold core 12, a first upper mold 13, a second upper mold 14, a diverter cone 15, a first upper mold plate 16, a second upper mold plate 17, a first side mold 18, and a second side mold 19. The diverter cone 15 is positioned in the center of the upper mold core 12, within the casting cavity 11, and opposite the gate assembly 3. The first upper mold 13 and the second upper mold 14 are detachably connected to both ends of the upper mold core 12. The first upper mold plate 16 is detachably connected to the first upper mold 13, and the second upper mold plate 17 is detachably connected to the second upper mold 14. The first side mold 18 is detachably connected to the first upper mold 13 and the lower mold assembly 2, and the second side mold 19 is detachably connected to the second upper mold 14 and the lower mold assembly 2. The second upper mold plate 17 is detachably and movably connected to the demolding assembly 4. The first and second upper molds 13, 14 are V-shaped. The thickness of the first and second upper molds 13, 14 is 15-20 mm. The casting cavity 11 is shaped like a spoke, and after the metal liquid fills the casting cavity 11, the formed product is the spoke. The spoke edge portion adopts a hollow structure, which can reduce the weight of the spoke as a whole and reduce the casting time as a whole.

[0032] The upper mold assembly 1 further includes a first thermal insulation layer 161 and a second thermal insulation layer 162 . The first thermal insulation layer 161 covers the first upper mold 13 , and the second thermal insulation layer 162 covers the second upper mold 14 .

[0033] The demolding assembly 4 includes an upper plate 41, a mounting plate 42, a first ejector pin 43, a second ejector pin 44, and a guide pin and guide sleeve 45. The upper plate 41 is detachably connected to the mounting plate 42. One end of the first ejector pin 43 is detachably connected to the mounting plate 42, and the end of the first ejector pin 43 away from the mounting plate 42 is detachably connected to the upper mold core 12. One end of the second ejector pin 44 is detachably connected to the mounting plate 42, and the end of the second ejector pin 44 away from the mounting plate 42 is detachably connected to the second upper mold plate 17 and the second upper mold 14. One end of the guide pin and guide sleeve 45 is connected to the mounting plate 42, and the end of the guide pin and guide sleeve 45 away from the mounting plate 42 is detachably connected to the second upper mold plate 17. The upper plate 41, mounting plate 42, and guide pin and guide sleeve 45 form a reset mechanism that facilitates demolding of the molded product.

[0034] The lower mold assembly 2 includes a first lower mold 21, a second lower mold 22, and a lower mold base 23; the first lower mold 21 is detachably connected to the lower mold base 23 and to the first side mold 18; the first lower mold 21 is detachably connected to the lower mold base 23 and to the first side mold 18; the gate assembly 3 is detachably arranged on the lower mold base 23 and is connected to the first lower mold 21 and the second lower mold 22. The thickness of the first lower mold 21 and the second lower mold 22 is 15-20 mm. The lower mold assembly 2 also includes a third insulation layer 24 and a fourth insulation layer 25. The third insulation layer 24 covers the first lower mold 21, and the fourth insulation layer 25 covers the second lower mold 22. Of course, it is understandable that the first insulation layer 161, the second insulation layer 162, the third insulation layer 24, and the fourth insulation layer 25 can be insulation cotton or other materials with insulation function.

[0035] The sprue assembly 3 includes a thermos cup 31, a sprue sleeve 32, and a filter ring 33; one end of the thermos cup 31 is detachably connected to the lower mold base 23, and the end of the thermos cup 31 away from the lower mold base 23 is connected to the sprue sleeve 32; the sprue sleeve 32 is respectively connected to the first lower mold 21 and the second lower mold 22; the filter ring 33 is connected to the sprue sleeve 32 and is located in the casting cavity 11; the filter ring 33 is located above the sprue sleeve 32. The thermos cup 31, the sprue sleeve 32, and the filter ring 33 are aligned with the center line of the diverter cone 15. The filter ring 33 mainly serves to filter impurities in the metal liquid. At the same time, the thermos cup 31 is truncated cone-shaped, and the filter ring 33 is truncated cone-shaped.

[0036] The deep concave spoke low-pressure mold also includes a first duct cooling group 5 and a second duct cooling group 6. The first duct cooling group 5 is disposed on the first upper mold plate 16 and connects the upper mold core 12, the first insulation layer 161, the second insulation layer 162, the first side mold 18, and the second side mold 19. The second duct cooling group 6 is disposed on the lower mold base 23 and connects the third insulation layer 24 and the fourth insulation layer 25. The first and second duct cooling groups 5 and 6 adopt a dual-inlet and dual-outlet mode. Cooling air from the first duct cooling group 5 enters from the upper mold core 12 and flows to the first insulation layer 161 and the first side mold 18, as well as the second insulation layer 162 and the second side mold 19, respectively. Cooling air from the second duct cooling group 6 enters from the lower mold base 23 and flows to the third insulation layer 24 and the fourth insulation layer 25, respectively. This effectively solves thermal problems and shrinkage in molded products and improves the internal quality of molded products. The first air duct cooling group 5 is provided with at least eight groups of air holes, and the second air duct cooling group 6 is provided with at least seven groups of air holes.

[0037] The deep concave spoke low-pressure mold also includes a support member 7, one end of which is mounted on the lower mold base 23. The end of the support member 7, which is remote from the lower mold base 23, is detachably connected to the second upper mold plate 17. The support member 7 is concave-shaped and primarily supports the second upper mold plate 17. The deep concave spoke low-pressure mold also includes a mold connecting plate 8, which is detachably connected to the first upper mold plate 16. This concave-shaped mold connecting plate 8 is used to connect to external devices.

[0038] It is understood that the deep concave wheel hub consists of two parts: the spokes with deep concave structure and the ordinary rim. The spokes with deep concave structure are cast by low-pressure die casting, while the rim is formed by profile spinning. The spokes and rim are then combined by interference fit and welded by friction stir welding to form an integral wheel hub.

[0039] The working principle of the low-pressure mold for the deep concave spoke structure provided in this embodiment is described below:

[0040] Under pressure, the molten metal passes through the insulation cup 31 and sprue bushing 32, is filtered by the filter ring 33, and then is diverted by the diverter cone 15, ultimately filling and molding the casting cavity 11. The first, second, third, and fourth insulation layers 161, 162, 24, and 25, respectively, insulate and mold the first upper mold 13, second upper mold 14, first lower mold 21, and second lower mold 22. The cast product is cooled by the first and second duct cooling groups 5, 6. Finally, the demolding assembly 4 resets and releases the mold, removing the molded product.

[0041] In summary, the embodiments provided by the present invention have the following main effective effects:

[0042] The upper mold core, first upper mold, second upper mold, first side mold, and second side mold of the upper mold assembly, along with the first and second lower molds of the lower mold assembly, form a casting cavity. Liquid metal flows through a thermos cup, sprue sleeve, filter ring, and diverter cone before filling and molding the casting cavity. The cast product is cooled by the first and second air duct cooling groups. Casting only the spokes, without the rim, reduces casting time and costs by optimizing the mold structure and adjusting the casting dimensions. Shrinkage and cavitation are eliminated, effectively meeting the requirements of wheel impact, dynamic bending, and dynamic radial fatigue tests.

[0043] The technical features of the above embodiments can be combined arbitrarily. In order to make the description concise, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0044] The above embodiments merely illustrate several implementations of the present invention. While the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of the utility model patent. It should be noted that a person skilled in the art would be able to make numerous variations and improvements without departing from the concept of the present invention, and these variations and improvements fall within the scope of protection of the present invention. Therefore, the scope of protection of the present utility model patent shall be determined by the appended claims.

Claims

1. A low-pressure die for a spoke with a deep concave structure, characterized in that: The mold assembly comprises an upper mold assembly, a lower mold assembly, a gate assembly, and a demoulding assembly; the upper mold assembly is detachably connected to the lower mold assembly to form a casting cavity, and the upper mold assembly is located above the lower mold assembly; the gate assembly is detachably connected to the lower mold assembly and communicates with the casting cavity; the demoulding assembly is detachably and movably connected to the upper mold assembly, and the demoulding assembly is located above the upper mold assembly; The upper mold assembly includes an upper mold core, a first upper mold, a second upper mold, a diverter cone, a first upper mold plate, a second upper mold plate, a first side mold, and a second side mold; the diverter cone is arranged in the middle of the upper mold core, is located in the casting cavity, and is opposite to the gate assembly; the first upper mold and the second upper mold are respectively detachably connected to the two ends of the upper mold core; the first upper mold plate is detachably connected to the first upper mold, and the second upper mold plate is detachably connected to the second upper mold; the first side mold is detachably connected to the first upper mold and the lower mold assembly, and the second side mold is detachably connected to the second upper mold and the lower mold assembly; the second upper mold plate is detachably and movably connected to the demoulding assembly; the first upper mold and the second upper mold are V-shaped.

2. The low-pressure die for the spoke with a deep concave structure according to claim 1, characterized in that: The demoulding assembly includes an upper top plate, a mounting plate, a first ejector rod, a second ejector rod, and a guide column and guide sleeve; the upper top plate is detachably connected to the mounting plate; one end of the first ejector rod is detachably connected to the mounting plate, and the end of the first ejector rod away from the mounting plate is detachably connected to the upper mold core; One end of the second push rod is detachably connected to the mounting plate, and the end of the second push rod away from the mounting plate is detachably connected to the second upper template and the second upper template; one end of the guide column and guide sleeve is connected to the mounting plate, and the end of the guide column and guide sleeve away from the mounting plate is detachably connected to the second upper template.

3. The low-pressure mold for the spoke with a deep concave structure according to claim 2, characterized in that: The lower mold assembly includes a first lower mold, a second lower mold, and a lower mold base; the first lower mold is detachably connected to the lower mold base and is detachably connected to the first side mold; the gate assembly is detachably arranged on the lower mold base and is connected to the first lower mold and the second lower mold.

4. The low-pressure die for the spoke with a deep concave structure according to claim 3, characterized in that: The gate assembly includes a thermos cup, a gate sleeve, and a filter ring; one end of the thermos cup is detachably connected to the lower mold base, and the end of the thermos cup away from the lower mold base is connected to the gate sleeve; the gate sleeve is connected to the first lower mold and the second lower mold respectively; the filter ring is connected to the gate sleeve and is located in the casting cavity; the filter ring is located above the gate sleeve.

5. The low-pressure die for the spoke with a deep concave structure according to claim 4, characterized in that: The thermos cup, the sprue sleeve, the filter ring and the center line of the diverter cone are consistent; the thermos cup is in a truncated cone shape; the filter ring is in a truncated cone shape.

6. The low-pressure die for the spoke with a deep concave structure according to claim 4, characterized in that: The upper mold assembly further includes a first thermal insulation layer and a second thermal insulation layer, wherein the first thermal insulation layer covers the first upper mold, and the second thermal insulation layer covers the second upper mold.

7. The low-pressure die for the spoke with a deep concave structure according to claim 6, characterized in that: The lower mold assembly further includes a third thermal insulation layer and a fourth thermal insulation layer. The third thermal insulation layer covers the first lower mold, and the fourth thermal insulation layer covers the second lower mold.

8. The low-pressure die for the spoke with a deep concave structure according to claim 7, characterized in that: It also includes a first air duct cooling group and a second air duct cooling group; the first air duct cooling group is arranged on the first upper mold plate, and is connected in series with the upper mold core, the first thermal insulation layer, the second thermal insulation layer, the first side mold, and the second side mold; the second air duct cooling group is arranged on the lower mold base, and is connected in series with the third thermal insulation layer and the fourth thermal insulation layer; the first air duct cooling group is provided with at least eight groups of air holes, and the second air duct cooling group is provided with at least seven groups of air holes.

9. The low-pressure die for the spoke with a deep concave structure according to claim 8, characterized in that: It also includes a support member, one end of which is arranged on the lower mold base, and one end of the support member away from the lower mold base is detachably connected to the second upper mold plate, and the support member is concave in shape.

10. The low-pressure die for spokes with deep concave structure according to claim 1, characterized in that: It also includes a mold connecting plate, which is detachably connected to the first upper template and is in a concave shape.

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