Vertical parting casting method for lower support
By setting up an inner gate and a riser in the vertical molding casting method of the lower support, the problem of loosening the connection arm is solved, and the effect of improving the quality of the casting and reducing defects is achieved.
Patent Information
- Application Number
- CN202411466363.4
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2024-10-21
- Publication Date
- 2025-02-11
AI Technical Summary
During the vertical molding and casting process, the connecting arms of the lower support are prone to shrinkage, and existing process improvement measures have not effectively solved this problem.
A modified vertical typing casting method is adopted, by setting an inner gate and a riser at the upper end of the bottom plate of the lower support, the riser includes the left riser and the right riser, the left riser is connected to the inner gate, and the right riser is The height is higher than the left riser, and the width of the right riser is greater than the width of the left riser, so that the right riser is protruded from the left riser, the liquid outlet end of the horizontal runner and the side of the left riser The part and the protruding part of the right riser are connected.
Through the setting of the casting system and the riser, the static pressure and flow rate of the metal liquid are increased, the filling and shrinkage effect is ensured, the casting is shrinked, the internal defects are reduced, and the product pass rate is improved.
Smart Images
Figure CN119407106A_ABST
Abstract
Description
Technical Field
[0001] The invention relates to the technical field of casting, in particular to a vertical splitting casting method for a lower support. Background Art
[0002] Vertical parting casting refers to using left and right templates to form left and right sand molds that are parted along the vertical plane, respectively. The left and right sand molds are combined to form a casting mold, and then the molten metal liquid is injected into the casting mold cavity from the pouring cup for pouring.
[0003] The support is a connecting component commonly used in vehicles to connect two components, wherein the lower support includes a base plate and a pair of connecting arms located above the base plate, the free ends of the two connecting arms are provided with coaxial connecting holes, and the bottom of the base plate and the positions corresponding to the two connecting arms are provided with weight-reducing grooves, the weight-reducing grooves are in the form of waist-shaped long grooves, and as the depth of the weight-reducing grooves increases, the length of the waist-shaped long grooves gradually decreases. During vertical split casting, the weight-reducing grooves are formed by a raised sand mold, and at the same time, in order to facilitate the subsequent riser cutting processing of the lower support, the inner gate of the vertical split casting is usually arranged on the outside of the weight-reducing groove.
[0004] However, when our company performs vertical split casting on the lower support, the two connecting arms of the lower support are horizontal, and internal gates are set at both ends of the base and outside the two weight-reducing grooves (such as Figure 1 As shown in the figure, after casting, shrinkage occurs on the inner side of the connecting arm of the lower support. In order to solve the shrinkage problem of the casting, our company has made many improvements to the casting process of the lower support, such as increasing the pouring temperature of the molten metal, changing the position of the bottom plate side of the inner gate on both sides, and changing the position of the parting surface so that the parting surface is located at the root of the fixed end of the connecting arm, using sand molds for forming weight-reducing grooves to reduce obstruction to the flow of molten metal, and other process improvements. However, the shrinkage problem of the lower support has not been solved. Summary of the invention
[0005] The purpose of the present invention is to provide a vertical split casting method for a lower support in view of the deficiencies of the prior art, which effectively solves the shrinkage problem of the lower support product of the vertical split casting, reduces the internal defects of the product, and improves the qualified rate of the product.
[0006] The technical solution adopted by the present invention to solve its technical problems is: a vertical split-molding casting method for a lower support, comprising a lower support and a pouring system, wherein the two connecting arms of the same lower support are located in the same vertical plane, the pouring system is located above the lower support, an inner gate is arranged at the upper end of the bottom plate of the lower support, the pouring system comprises a pouring cup, a cross runner and a riser, the riser comprises a left riser and a right riser, the left riser is connected to the inner gate, close to one side of the cross runner, the side of the right riser protrudes from the side of the left riser, and the cross runner is connected to the left riser and the right riser.
[0007] Furthermore, the volume of the right riser is greater than that of the left riser, the top of the right riser is higher than the top of the left riser, and the top of the right riser is not higher than the bottom of the pouring cup.
[0008] Furthermore, the height of the right riser is 1.5-2.3 times the height of the left riser.
[0009] Furthermore, the liquid outlet of the runner is lower than the top of the left riser.
[0010] Furthermore, the vertical center line of the inner gate and the two connecting arms of the lower support are located on the same side of the vertical center line of the bottom plate of the lower support and close to one side of the pouring system.
[0011] Furthermore, the left riser, the lower support and the runner are located on the same side of the parting surface of the vertical split casting, and the right riser is located on the other side of the parting surface of the vertical split casting.
[0012] Furthermore, the inner gate is located above the shallow groove of the bottom plate of the lower support.
[0013] The beneficial effect of the present invention is as follows: during vertical split casting, the present invention arranges the two connecting arms of the lower support one above and one below, and at the same time, an inner gate and a riser are arranged at the upper end of the bottom plate of the lower support and the outer side of the weight-reducing groove, and the riser includes a left riser and a right riser, the left riser is connected to the inner gate, the height of the right riser is higher than the left riser, and the width of the right riser is greater than the width of the left riser, so that the right riser protrudes from the left riser near the side of the cross runner, and the liquid outlet end of the cross runner is connected to the side of the left riser and the protruding part of the right riser. The present invention is conducive to ensuring the flow rate and flow state of the molten metal during casting and ensuring mold filling through the setting of the pouring system and the riser in the pouring system, and at the same time, the static pressure of the molten metal can be increased, thereby increasing the flow rate of the molten metal during the cooling and shrinkage compensation process, ensuring the flow state of the molten metal, ensuring the shrinkage compensation effect of the molten metal in the riser on the lower support, and avoiding shrinkage and loosening of the casting. BRIEF DESCRIPTION OF THE DRAWINGS
[0014] Figure 1 It is a structural schematic diagram of the present invention before improvement.
[0015] Figure 2 It is a structural schematic diagram of the present invention.
[0016] Figure 3 yes Figure 1 main view.
[0017] Figure 4 yes Figure 1 Side view of.
[0018] Figure 5 yes Figure 1Rear view of.
[0019] Description of reference numerals: 1——lower support, 11——connecting arm, 12——bottom plate, 121——shallow groove, 122——weight reduction groove, 13——inner gate, 2——pouring system, 21——pouring cup, 22——cross runner, 23——riser, 231——left riser, 232——right riser. DETAILED DESCRIPTION
[0020] The present invention will be further described in detail below in conjunction with the accompanying drawings and specific embodiments, but the implementation scope of the present invention is not limited thereto.
[0021] It should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the present invention. In addition, the terms "first", "second", and "third" are used for descriptive purposes only, and cannot be understood as indicating or implying relative importance.
[0022] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.
[0023] like Figure 2-Figure 5As shown, a vertical split-molding casting method for a lower support of the present embodiment includes a lower support 1 and a pouring system 2. The two connecting arms 11 of the same lower support 1 are located in the same vertical plane, that is, in the vertical split-molding casting of the present invention, the two connecting arms 11 of the lower support 1 are vertically arranged one above and one below. The pouring system 2 is located above the lower support 1. An inner gate 13 is provided at the upper end of the bottom plate 12 of the lower support 1. The pouring system 2 includes a pouring cup 21, a cross runner 22 and a riser 23. The riser 23 includes a left riser 231 and a right riser 232. The left riser 231 is connected to the inner gate 13 and is close to one side of the cross runner 22. The side of the right riser 232 protrudes from the side of the left riser 231. The cross runner 22 is connected to the left riser 231 and the right riser 232. During operation, the left and right templates are used to prepare the left and right sand molds respectively. The left sand mold forms the left riser 231 cavity, and the right sand mold forms the right riser 232 cavity. The left and right sand molds are combined to form a casting cavity and a pouring system cavity, wherein the left and right riser 232 cavities form a complete riser cavity. The molten metal is injected into the casting cavity from the pouring cup 21. After cooling, the lower support 1 blank and the pouring system 2 connected to the lower support 1 are obtained. The present invention arranges the two connecting arms 11 of the lower support 1 one above and one below, and at the same time, an inner gate 13 is provided at the upper end of the bottom plate 12 of the lower support 1 and the outer side of the weight-reducing groove 122. During pouring, the molten metal passes through the pouring cup 21, the cross runner 22 and the riser 23 in sequence and enters the casting cavity; the present invention can increase the static pressure of the molten metal through the pouring system 2 and the setting of the riser 23 in the pouring system 2, thereby increasing the flow rate of the molten metal during the cooling and shrinkage compensation process, ensuring the flow state of the molten metal, ensuring the shrinkage compensation effect of the molten metal in the riser 23 on the lower support 1, and avoiding shrinkage and other problems in the casting.
[0024] like Figure 2 , Figure 3 , Figure 4 As shown, the volume of the right riser 232 is larger than the volume of the left riser 231, the top of the right riser 232 is higher than the top of the left riser 231, and the top of the right riser 232 is not higher than the bottom of the pouring cup 21; the height of the right riser 232 is 1.5-2.3 times the height of the left riser 231, and preferably the height of the right riser 232 is 1.9-2.1 times the height of the left riser 231. During the cooling process, the right riser 232 can increase or decrease the static pressure of the left riser 231 on the inner gate 13, ensuring the flow rate and flow state of the molten metal during the shrinkage compensation process, thereby ensuring the shrinkage compensation effect of the molten metal in the riser 23 on the lower support 1 and avoiding the shrinkage of the casting.
[0025] like Figure 2 and 3As shown, the liquid outlet of the cross runner 22 is lower than the top of the left riser 231. On the one hand, during pouring, it is beneficial to ensure that the mold cavity is filled first and the riser 23 is filled later, thereby ensuring the temperature of the molten metal and the smooth flow of the molten metal during pouring, and at the same time, it is beneficial to ensure the temperature of the molten metal in the riser cavity after pouring, thereby ensuring the shrinkage compensation effect of the riser 23; on the other hand, since the cross runner 22 is connected to the left riser 231 and the right riser 232, after the left and right sand molds are closed, the cavity of the cross runner 22 is connected to the cavities of the left riser 231 and the right riser 232, which is beneficial to increase the pouring speed and ensure the temperature of the molten metal in the mold cavity, thereby ensuring the smooth flow of the molten metal and the quality of the casting.
[0026] like Figure 3 As shown, the vertical center line of the ingate 13 and the two connecting arms 11 of the lower support 1 are located on the same side of the vertical center line of the bottom plate 12 of the lower support 1, and close to the side of the pouring system 2, that is, biased towards the middle of the sand mold. The heat dissipation in the middle of the sand mold is slow, and the vertical center line of the ingate 13 and the two connecting arms 11 are biased towards the side of the pouring system 2, which is beneficial to the flow of molten metal, ensuring the shrinkage compensation of the lower support 1 and improving the quality of the casting product; at the same time, since the bottom plate 12 of the lower support and the weight reduction groove 122 of the bottom plate 12 are on the same center line, the vertical center line of the ingate 13 is biased towards the side of the pouring system 2, and the ingate 13 is not directly opposite to the weight reduction groove 122, but is offset to the side of the weight reduction groove 122, which is beneficial to the flow of molten metal for shrinkage compensation, especially the shrinkage compensation of the molten metal on the inner side of the connecting arm, to avoid shrinkage and loosening of the casting.
[0027] like Figure 4 As shown, the left riser 231, the lower support 1 and the runner 22 are located on the same side of the parting surface of the vertical split casting, the right riser 232 is located on the other side of the parting surface of the vertical split casting, and the pouring cup 21 is symmetrically arranged along the parting surface of the vertical split casting. The parting surface of the vertical split casting can be made to coincide with or be close to the bottom surface of the bottom plate 12 of the lower support 1, so that there is no parting surface in the casting after casting; at the same time, as Figure 5 As shown, since a shallow groove 121 is provided at the bottom of the bottom plate 12 of the lower support 1, the inner gate 13 is located above the shallow groove 121 of the bottom plate 12 of the lower support 1, that is, the inner gate 13 is located at the upper end of the bottom plate 12 and inside the extension line of the two side walls of the shallow groove 121, the inner gate 13 can be narrowed, and the flow rate of the molten metal can be increased during pouring to ensure the flow state of the molten metal; during shrinkage compensation, under the action of the static pressure of the molten metal in the riser, it is beneficial to increase the flow rate of the molten metal, so that the molten metal forms an ideal flow state and enters the casting cavity, thereby realizing the shrinkage compensation effect and preventing shrinkage.
[0028] Finally, it should be noted that the above embodiments are only used to illustrate the technical solution of the present invention, rather than to limit the scope of protection of the present invention. Although the present invention has been described in detail with reference to the preferred embodiments, those skilled in the art should understand that the technical solution of the present invention can be modified or replaced by equivalents without departing from the essence and scope of the technical solution of the present invention.
Claims
1. A vertical split casting method for a lower support, characterized in that: The invention comprises a lower support (1) and a pouring system (2), wherein two connecting arms (11) of the lower support (1) are located in the same vertical plane, the pouring system (2) is located above the lower support (1), an inner gate (13) is arranged at the upper end of the bottom plate (12) of the lower support (1), the pouring system (2) comprises a pouring cup (21), a runner (22) and a riser (23), the riser (23) comprises a left riser (231) and a right riser (232), the left riser (231) is connected to the inner gate (13) and is close to one side of the runner (22), the side of the right riser (232) protrudes from the side of the left riser (231), and the runner (22) is connected to the left riser (231) and the right riser (232).
2. A vertical split casting method for a lower support according to claim 1, characterized in that: The volume of the right riser (232) is greater than that of the left riser (231), the top of the right riser (232) is higher than the top of the left riser (231), and the top of the right riser (232) is not higher than the bottom of the pouring cup (21).
3. A vertical split casting method for a lower support according to claim 1, characterized in that: The height of the right riser (232) is 1.5-2.3 times the height of the left riser (231).
4. A vertical split casting method for a lower support according to claim 1, characterized in that: The liquid outlet of the runner (22) is lower than the top of the left riser (231).
5. The vertical split casting method of the lower support according to claim 1, characterized in that: The vertical center line of the inner gate (13) and the two connecting arms (11) of the lower support (1) are located on the same side of the vertical center line of the bottom plate (12) of the lower support (1) and close to one side of the pouring system (2).
6. A vertical split casting method for a lower support according to claim 1, characterized in that: The left riser (231), the lower support (1) and the runner (22) are located on the same side of the parting surface of the vertical split casting, and the right riser (232) is located on the other side of the parting surface of the vertical split casting.
7. The vertical split casting method of the lower support according to claim 1, characterized in that: The inner gate (13) is located above the shallow groove (121) of the bottom plate (12) of the lower support (1).