Blank pressing riser
By designing a pressure riser and using a gasket and beveled edge structure, the problem of poor feeding effect in castings was solved, thereby improving the forming quality of castings and increasing the utilization rate of molten iron.
Patent Information
- Application Number
- CN202423294233.5
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-12-30
- Publication Date
- 2026-02-06
- Estimated Expiration
- 2034-12-30
AI Technical Summary
In existing technologies, the solidification time of molten metal is short and the feeding effect is poor, resulting in a high scrap rate of castings. In particular, when casting thick castings on lost foam, the utilization rate of molten iron is low, the yield is low, and shrinkage cavities and porosity are prone to occur. Ordinary circular edge risers have a small contact area, and their feeding effect is ineffective.
Design a pressure riser, including a riser body and a gasket. The gasket is placed on the hot spot of the casting, and the riser body is placed on the gasket to increase the contact area and prolong the contact time. The gasket is made of graphite or metal chill to delay cooling. The beveled edge increases the contact area and prevents the bottom of the riser from solidifying too early.
It prolongs the contact time between the riser and the hot spot of the casting, enhances the feeding effect, reduces the "meat-carrying" defect, ensures the casting forming quality, and improves the utilization rate of molten iron and the yield.
Smart Images
Figure CN223876032U_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The utility model relates to foundry technology field especially is related to a press edge riser. BACKGROUND
[0002] In production practice, many casting waste is caused by shrinkage porosity defects. In the prior art, due to short metal liquid solidification time, poor feeding effect, low utilization rate of molten iron, it is difficult to improve the yield of finished products, the production cost is high, the production efficiency is low, especially in the casting of thick and large castings on the lost foam, the utilization rate of molten iron is low, the yield of finished products is lower, and a series of technical problems such as shrinkage and shrinkage phenomenon occur, so the riser must be used for feeding. For large cold header castings, the hot section thickness reaches 500-900mm, if top riser is used for feeding, the top riser may be caused by graphite expansion due to late solidification, so the hot section of the large cold header casting needs to use the press edge riser, as shown in the figure, the ordinary circular press edge riser has small bottom contact area, the riser and the hot section contact surface solidify early and lose the feeding effect. Figure 7 UTILITY MODEL CONTENT
[0003] The utility model aims at solving one of the technical problems in the related art at least to some extent. Therefore, the utility model provides a press edge riser.
[0004] The utility model adopts the technical scheme that a press edge riser comprises a riser body and a riser gasket.
[0005] The top end of the riser body is a flat surface, the bottom end of the riser body is a flat surface, the first edge of the flat surface is a straight line, the two ends of the first edge are connected through the second edge, and the second edge is an arc line.
[0006] The riser gasket is a cuboid structure, the top surface of the riser gasket comprises a first gasket edge and a second gasket edge arranged oppositely, and the first gasket edge and the second gasket edge are two long edges of the top surface of the riser gasket; the riser gasket is arranged at the upper end edge of the hot section of the casting, and the second gasket edge is aligned with the upper end edge of the hot section of the casting, and the first gasket edge is located at the upper end of the hot section of the casting.
[0007] The flat surface is arranged on the riser gasket, and the first edge corresponds to the first gasket edge of the riser gasket, and the second edge extends out of the second gasket edge of the riser gasket.
[0008] In a preferred embodiment of the utility model, the length of the first gasket edge and the second gasket edge is 1 / 4-1 / 3 of the thickness of the hot section area of the casting.
[0009] In a preferred embodiment of the utility model, the length direction of the two ends of the riser pad respectively extends the two ends of the lower plane.
[0010] In a preferred embodiment of the utility model, the riser pad width is 16-18mm, height is 5-7mm, and the length direction of the two ends of the riser pad respectively extends the two ends of the lower plane 14-16mm.
[0011] In a preferred embodiment of the utility model, the riser pad is made of graphite or metal cold iron.
[0012] In a preferred embodiment of the utility model, the riser body is cylindrical, and a cutting edge bevel is arranged from the bottom of the riser body to the side close to the casting hot spot, and the bottom of the riser body forms a lower plane after the cutting edge bevel is arranged;And the first edge is the common edge of the bevel and the lower plane.
[0013] In a preferred embodiment of the utility model, the cutting edge bevel is 60°.
[0014] The utility model discloses the beneficial effect is: the linear edge of the riser body is stacked on the linear edge of the riser pad, increases the contact area of the riser body and casting hot spot, and prolongs the contact time of the riser body and casting hot spot, makes the contact surface of the riser body and casting hot spot solidification time extension, avoids the premature solidification failure of riser bottom, guarantees the feeding effect of liquid metal. And because setting up the riser pad on the casting hot spot, setting up the riser body on the riser pad, the setting of the riser pad prevents the premature solidification of the bottom of the riser body, realizes the effect of protecting casting hot spot, reduces the " with meat " defect, ensures that the riser body will not damage casting hot spot when removing. BRIEF DESCRIPTION OF DRAWINGS
[0015] Figure 1 It is the structure schematic of the utility model Figure 1 ;
[0016] Figure 2 It is the structure schematic of the utility model Figure 2 ;
[0017] Figure 3 It is the structure schematic of the length direction of the two ends of the riser pad respectively extending the two ends of the lower plane;
[0018] Figure 4 It is the structure schematic of the riser pad;
[0019] Figure 5 It is the structure schematic of the riser body;
[0020] Figure 6 It is the structure schematic of the first edge and the first pad edge;
[0021] Figure 7 is a schematic diagram of a connection structure of an existing common round pressing edge riser and a casting hot spot;
[0022] In the figure: riser body 1; upper plane 101; lower plane 102; first edge 1021; second edge 1022; cutting edge bevel 103; riser gasket 2; first gasket edge 201; second gasket edge 202; casting hot spot 3. DETAILED DESCRIPTION
[0023] The embodiments of the present application are described in detail below, examples of which are shown in the drawings, wherein the same or similar notations represent the same or similar elements or elements having the same or similar functions throughout. The embodiments described below by referring to the drawings are exemplary only, and are used only for explaining the present application, and cannot be understood as a limitation of the present application.
[0024] In the description of the present application, it should be understood that the orientations or positional relationships indicated by the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", etc. are based on the orientations or positional relationships shown in the drawings, and are only for the convenience of describing the present application and simplifying the description, and therefore cannot be understood as indicating or implying that the devices or elements indicated must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as a limitation of the present application. In addition, the terms "first", "second" are only for the purpose of description, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features limited by "first", "second" can explicitly or implicitly include one or more of the features. In the description of the present application, the meaning of "multiple" is two or more, unless otherwise specifically limited.
[0025] As Figures 1 to 6 shown, a pressing edge riser includes a riser body 1 and a riser gasket 2;
[0026] The top end of the riser body 1 is an upper plane 101, the bottom end of the riser body 1 is a lower plane 102, the first edge 1021 of the lower plane 102 is a straight edge, and the two ends of the first edge 1021 are connected by the second edge 1022, and the second edge 1022 is an arc edge;
[0027] The riser pad 2 is a cuboid structure, the top surface of the riser pad 2 comprises a first pad edge 201 and a second pad edge 202 arranged oppositely, and the first pad edge 201 and the second pad edge 202 are two long edges of the top surface of the riser pad 2; the riser pad 2 is arranged at the upper end edge of the casting hot spot 3, and the second pad edge 202 is kept aligned with the upper end edge of the casting hot spot 3, and the first pad edge 201 is located at the upper end of the casting hot spot 3.
[0028] The lower plane 102 is arranged on the riser pad 2, and the first edge 1021 corresponds to the first pad edge 201 of the riser pad 2, and the second edge 1022 extends out of the second pad edge 202 of the riser pad.
[0029] The edge pressing riser of the present application arranges the riser pad 2 on the casting hot spot 3, arranges the riser body 1 on the riser pad 2, and keeps the straight edge of the first edge 1021 of the riser body 1 corresponding to the first pad edge 201 of the riser pad 2, and the second edge 1022 extending out of the second pad edge 202 of the riser pad, that is, the straight edge of the riser body 1 is overlapped on the straight edge of the riser pad 2, which increases the contact area of the riser body 1 and the casting hot spot 3, prolongs the contact time of the riser body 1 and the casting hot spot 3, prolongs the solidification time of the contact surface of the riser body 1 and the casting hot spot 3, avoids the premature solidification failure of the bottom of the riser, and ensures the feeding effect of the liquid metal. And because the riser pad 2 is arranged on the casting hot spot 3, the riser body 1 is arranged on the riser pad 2, the arrangement of the riser pad 2 prevents the premature solidification of the bottom of the riser body 1, realizes the protection of the casting hot spot, reduces the "flesh" defect, and ensures that the casting hot spot 3 will not be damaged when the riser body 1 is removed.
[0030] As a preferred embodiment, in the present application, the length of the first pad edge 201 and the second pad edge 202 is 1 / 4-1 / 3 of the thickness of the casting hot spot area, which realizes the protection of the casting hot spot 3 by the riser pad 2.
[0031] As a preferred embodiment, the two ends of the length direction of the riser pad 2 respectively extend out of the two ends of the lower plane, which can make the liquid metal stay in the riser body for a longer time, slow down the heat dissipation, and thus enhance the feeding effect; more preferably, the width of the riser pad 2 is 16-18 mm, the height is 5-7 mm, and the two ends of the length direction of the riser pad 2 respectively extend out of the two ends of the lower plane by 14-16 mm, which increases the contact area between the riser body 1 and the hot section 3 of the casting, which means that the heat conduction path is lengthened, and the possibility of premature cooling of the liquid metal is reduced, so that the liquid metal feeding in the hot section area of the casting can be effectively ensured to be more stable, and the poor condensation caused by too low temperature can be avoided. After the two ends of the riser pad 2 extend out, the cooling speed at the bottom is slowed down, so that the liquid metal in the riser body 1 can maintain a flowing state for a longer time during the entire solidification process, effectively supplementing the shrinkage area in the casting and enhancing the forming quality of the casting.
[0032] As a preferred embodiment, the riser pad 2 is made of graphite or metal chill, which further slows down the cooling of the thick section of the casting and improves the feeding efficiency of the riser.
[0033] As a preferred embodiment, the riser body 1 is cylindrical, and a chamfered bevel 103 is arranged from the bottom of the riser body 1 to the side close to the hot section 3 of the casting, and the bottom of the riser body 1 forms a lower plane 102 after the chamfered bevel is arranged; and the first edge 1021 is the common edge of the chamfered bevel 103 and the lower plane 102. More specifically, the chamfered bevel 103 is 60°. That is, the edge pressing riser of the present application cuts upward along the 60° chamfered bevel 103 from the bottom end of the cylindrical riser body 1 to the side close to the hot section 3 of the casting, and then the circular shape of the riser body 1 forms a lower plane 102 after cutting, compared with the existing ordinary circular edge pressing riser which has a large shrinkage hole at the bottom due to the small contact area of the bottom, the first edge 1021 of the present application is the common edge of the chamfered bevel 103 and the lower plane 102, and the first edge 1021 corresponds to the first pad edge 201 of the riser pad 2, that is, the center of the riser body 1 of the present application moves to the direction close to the hot section of the casting, thereby increasing the contact area between the edge pressing riser and the hot section 3 of the casting, and effectively improving the liquid feeding effect of the riser body.
[0034] In the description of the present specification, the description of the terms "one embodiment", "certain embodiments", "illustrative embodiments", "example", "specific example" or "some examples" and the like means that the specific features, structures, materials or characteristics described in connection with the embodiment or example are included in at least one embodiment or example of the present application. In the present specification, the illustrative description of the above terms does not necessarily mean 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.
[0035] To sum up, although the utility model has disclosed above with preferred embodiment, the above preferred embodiment is not used to limit the utility model, the ordinary skilled person in the art can make various changes and decorations without departing from the spirit and scope of the utility model, therefore the protection scope of the utility model is accurate with the range defined by the claims.
Claims
1. A blank holder feeder, characterized in that, The riser body (1) and the riser gasket (2) are included. The riser body (1) has an upper plane (101) at the top end and a lower plane (102) at the bottom end, the first edge (1021) of the lower plane (102) is a straight line, and the two ends of the first edge (1021) are connected by a second edge (1022) which is an arc line. The riser gasket (2) is a cuboid structure, the top surface of the riser gasket (2) includes a first gasket edge (201) and a second gasket edge (202) arranged oppositely, and the first gasket edge (201) and the second gasket edge (202) are two long edges of the top surface of the riser gasket (2); the riser gasket (2) is arranged at the upper end edge of the casting hot spot (3), and the second gasket edge (202) is aligned with the upper end edge of the casting hot spot (3), and the first gasket edge (201) is located at the upper end of the casting hot spot (3). The lower plane (102) is arranged on the riser gasket (2), and the first edge (1021) corresponds to the first gasket edge (201) of the riser gasket (2), and the second edge (1022) extends out of the second gasket edge (202) of the riser gasket.
2. The edge trim feeder of claim 1 wherein, The length of the first gasket edge (201) and the second gasket edge (202) is 1 / 4-1 / 3 of the thickness of the casting hot spot area.
3. The edge trim feeder of claim 1 wherein, The two ends of the length direction of the riser gasket (2) respectively extend out of the two ends of the lower plane.
4. The edge pad riser of claim 3, wherein, The width of the riser gasket (2) is 16-18mm, and the height is 5-7mm, and the two ends of the length direction of the riser gasket (2) respectively extend out of the two ends of the lower plane by 14-16mm.
5. The edge pad riser of claim 1, wherein, The riser gasket (2) is made of graphite or metal chill.
6. A flash riser as claimed in any one of claims 1 to 5, wherein, The riser body (1) is cylindrical, and a cutting edge bevel (103) is arranged from the bottom of the riser body (1) to the side close to the casting hot spot (3), and the bottom of the riser body (1) forms a lower plane (102) after the cutting edge bevel (103) is arranged; and the first edge (1021) is a common edge of the bevel (103) and the lower plane (102).
7. The edge pad of claim 6 wherein, The cutting edge bevel (103) is 60°.