Weight reduction riser for casting solid brake disc
By designing a weight loss riser with insulation and shrinkage part and V-shaped groove, the existing problems of large weight and unstable shrinkage effect are solved, and the weight loss, cost reduction and reduction effect of the riser is achieved.
Patent Information
- Application Number
- CN202422226642.5
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-09-11
- Publication Date
- 2025-07-01
- Estimated Expiration
- 2034-09-11
AI Technical Summary
The riser weight in existing solid brake disc casting is relatively large, resulting in unstable shrinkage effect, low process yield, and wasted cast iron, which increased costs.
A weight reduction riser for solid brake disc casting is designed, including a base body with a longitudinal runner and a transverse runner. A thermal insulation and shrinkage part is provided on the inner side of the top end. A smooth concave transition part is provided between the base body part and the thermal insulation and shrinkage part. A symmetric V-shaped groove is arranged in longitudinal direction between the top of the thermal insulation and shrinkage part.
By reducing the weight of the riser itself, the amount of cast iron is saved, the production cost is reduced, and the design of the V-shaped groove keeps the iron from condensed early and improves the shrinkage effect.
Smart Images
Figure CN223043590U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of brake disc casting, in particular to a weight-reducing riser for solid brake disc casting. Background Art
[0002] When producing a solid brake disc, due to the product structure problem, a riser must be added to compensate for shrinkage of the hot spot of the casting, as Figure 1 shown is a sand core for existing solid brake disc casting, which is used for forming a casting cavity in a sand mold. This sand core is used for a single-piece disc casting process, including a straight sprue with a pouring cup. Columnar risers are connected to both sides of the straight sprue through a cross sprue. Both sides of the columnar riser are connected to a brake disc sand mold through a longitudinal sprue. Among them, the riser adopts a traditional columnar structure. However, during the casting process, due to the large weight of the riser with a traditional structure, the feeding effect of the riser is unstable, resulting in a low process yield, wasting casting molten iron, and increasing costs.
[0003] Therefore, it is urgent to improve the riser in the existing sand core to achieve the purpose of reducing the weight of the riser and lowering the cost. Summary of the Utility Model
[0004] The purpose of the utility model is to overcome the defects and deficiencies existing in the prior art. For this reason, the utility model provides a weight-reducing riser for solid brake disc casting, which can reduce the weight of the riser, reduce the consumption of casting molten iron, and lower the production cost.
[0005] To achieve the above purpose, the utility model provides a weight-reducing riser for solid brake disc casting, including a matrix part with a longitudinal sprue and a cross sprue. A heat preservation feeding part is coaxially arranged inside the top end of the matrix part. A smooth concave transition part is arranged between the matrix part and the heat preservation feeding part; symmetric V-shaped grooves are longitudinally penetrated through the middle of the top of the heat preservation feeding part.
[0006] Further, the heat preservation feeding part is frustum-shaped, and the apex angle of the heat preservation feeding part is α, α = 4° ± 0.2°.
[0007] Further, the included angle of the V-shaped groove is β, β = 35° ± 5°.
[0008] Further, the transition part is an arc part, and the arc radius of the transition part is R, 3mm ≤ R ≤ 20mm.
[0009] Further, the depth of the V-shaped groove is H, H = 22mm ± 1mm.
[0010] Further, the bottom of the V-shaped groove is arc-shaped.
[0011] Compared with the prior art, the beneficial effects of the present utility model are as follows: through the heat preservation and feeding part and the transition part, the weight of the riser itself can be reduced, and the cost can be saved; through the V-shaped groove, the heat preservation and feeding part has two symmetrical sharp corners, which plays a role in heat preservation, so that the molten iron at this place does not solidify prematurely, and a better feeding effect is achieved. Description of the Drawings
[0012] Figure 1 It is a core for casting a solid brake disc in the prior art.
[0013] Figure 2 It is a structural schematic diagram of the present utility model.
[0014] Figure 3 It is a sectional schematic diagram of the present utility model.
[0015] Figure 4 It is a diagram of the use state of the present utility model.
[0016] Wherein: 1. Matrix part; 2. Transition part; 3. Heat preservation and feeding part; 11. Vertical runner; 12. Horizontal runner; 31. V-shaped groove. Specific Embodiments
[0017] Next, the technical solutions in the embodiments of the present utility model will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present utility model. Obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than all the embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative work shall fall within the protection scope of the present utility model.
[0018] In the description of the present utility model, it should be understood that the orientation or positional relationship indicated by the terms "center", "longitudinal", "transverse", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc. is based on the orientation or positional relationship shown in the accompanying drawings, and is only for the convenience of describing the present utility model 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 should not be construed as a limitation to the present utility model. Embodiment
[0019] Please refer to Figures 2 to 4 , the present utility model provides a weight-reducing riser for casting a solid brake disc, including a matrix part 1 with a vertical runner 11 and a horizontal runner 12. Among them, a heat preservation and feeding part 3 is coaxially arranged inside the top end of the matrix part 1, and a smooth concave transition part 2 is arranged between the matrix part 1 and the heat preservation and feeding part 3; a symmetrical V-shaped groove 31 is longitudinally penetrated through the middle of the top of the heat preservation and feeding part 3.
[0020] Through the heat preservation and feeding part 3 and the transition part 2, the weight of the riser itself can be reduced; through the V-shaped groove 31, the heat preservation and feeding part 3 is formed into two symmetrical sharp corners. When casting, the heat is concentrated at the sharp corners, and under the action of the sand mold, it plays a heat preservation role, so that the molten iron at this part does not solidify prematurely, achieving a better feeding effect.
[0021] The included angle of the V-shaped groove 31 here is β, and the depth of the V-shaped groove 31 is H. β is preferably 35°±5°, and H is preferably 22mm±1mm.
[0022] As an embodiment of the present utility model, the heat preservation and feeding part 3 is frustum-shaped, and the apex angle of the heat preservation and feeding part 3 is α, α = 4°±0.2°, which is convenient for demolding and taking out in the sand mold.
[0023] As an embodiment of the present utility model, the transition part 2 is an arc part, and the arc radius of the transition part 2 is R, 3mm≤R≤20mm. According to the size of the solid brake disc, the arc size of the transition part 2 is selected, which is beneficial to the feeding effect of the riser, and the details will not be elaborated here.
[0024] In addition, the bottom of the V-shaped groove 31 is arc-shaped, which is beneficial to the formation of the casting cavity in the sand mold, and the details will not be elaborated here.
[0025] When using the present utility model, as Figure 4 shown, it is integrated with the straight pouring rod, the brake disc sand mold, etc. The amount of molten iron used per box of sand mold is about Figure 1 0.6 Kg less than that of the traditional riser shown, saving about 1 yuan per box in total.
[0026] The present utility model can be outlined in other specific forms that do not violate the spirit or main features of the present utility model. Therefore, from any point of view, the above-mentioned implementation schemes of the present utility model can only be regarded as an explanation of the present utility model and cannot limit the present utility model. The claims point out the scope of the present utility model, while the above description does not point out the scope of the present utility model. Therefore, any change within the meaning and scope equivalent to the claims of the present utility model should be considered to be included within the scope of the claims of the present utility model.
Claims
1. A weight-reducing riser for solid brake disc casting, comprising a base part (1) with a longitudinal runner (11) and a transverse runner (12), characterized in that: A thermal insulation and shrinkage compensation portion (3) is coaxially arranged on the inner side of the top end of the base portion (1), and a smooth concave transition portion (2) is arranged between the base portion (1) and the thermal insulation and shrinkage compensation portion (3); a symmetrical V-shaped groove (31) is longitudinally penetrated in the middle of the top of the thermal insulation and shrinkage compensation portion (3).
2. The weight-reducing riser for solid brake disc casting according to claim 1, characterized in that: The thermal insulation and shrinkage-compensating portion (3) is in the shape of a frustum, and the top angle of the thermal insulation and shrinkage-compensating portion (3) is α, where α=4°±0.2°.
3. The weight-reducing riser for solid brake disc casting according to claim 2, characterized in that: The included angle of the V-shaped groove (31) is β, β=35°±5°.
4. The weight-reducing riser for solid brake disc casting according to claim 3, characterized in that: The transition portion (2) is an arc portion, and the arc radius of the transition portion (2) is R, 3mm≤R≤20mm.
5. The weight-reducing riser for solid brake disc casting according to claim 3, characterized in that: The depth of the V-shaped groove (31) is H, where H=22 mm±1 mm.
6. The weight-reducing riser for solid brake disc casting according to claim 5, characterized in that: The bottom of the V-shaped groove (31) is in an arc shape.