Die structure for improving yield of automobile brake caliper body casting process

Abstract

The invention belongs to the technical field of automobile brake caliper casting, and particularly relates to a mold structure for improving the yield of an automobile brake caliper body casting process, the mold structure comprises four cavities and a pouring cup which are arranged on a mold, the lower end of the pouring cup is communicated with a vertical pouring gate, and the upper end of the vertical pouring gate is communicated with a first transverse pouring gate. By arranging the middle cavity, the flowing speed of molten iron is reduced after the molten iron collides with an object, the flowing speed of the molten iron is limited by arranging the middle cavity and a spherical filter screen, and by arranging a fourth cross gate, a second water inlet, a second cross gate and a second riser, casting of a cavity below is facilitated; by arranging the third transverse pouring gate, the first water inlet, the first transverse pouring gate and the first riser, casting can be conveniently conducted on a cavity above, sand holes are not likely to exist in the bottom of a formed casting, meanwhile, iron slag can enter the positions below the transverse pouring gates and the vertical pouring gate through the arrangement of a spherical filter screen, and slag holes are prevented from occurring in the casting.

Description

Technical Field

[0001] The invention relates to the technical field of automobile brake caliper casting, in particular to a mold structure for improving the yield rate of automobile brake caliper casting process. Background Art

[0002] The brake caliper is one of the main components of the automobile braking system. During the braking process, the brake caliper clamps the brake pads through the hydraulic system and rubs the brake disc to achieve the purpose of braking. At present, brake calipers are mostly cast by DISA vertical line green sand casting, and the template size of its production line is: 650mm long and 520mm wide; the size of the brake caliper casting blank is: 185mm long, 74mm wide, and 163mm high. The existing brake caliper mold usually adopts the vertical placement process of the cylinder. According to the traditional process, for this caliper mold, at most 4 castings can be placed, and at least six risers are required to meet the requirements, resulting in low process yield, residual riser necks on each side of the casting, resulting in large grinding tasks, low production efficiency, and increased production costs.

[0003] The utility model with announcement number CN210475437U discloses a mold structure for improving the yield rate of automobile brake caliper casting process, which relates to the technical field of automobile brake caliper casting, including a pouring cup, a cross runner and six castings, the cylinder barrels of the castings are all placed horizontally, the six castings are arranged in two layers, and three castings are arranged in each layer. The lower part of the pouring cup is connected with the cross runner, and lap pieces are arranged on both sides of the lower part of the cross runner. The lower part of the lap pieces is respectively connected with vertical runners, and the middle and lower parts of the vertical runners are provided with vertically crossed and connected transverse runners. An upper and lower casting is arranged between the two vertical runners, and shrinkage feed risers are provided directly above the castings. The shrinkage feed risers are respectively connected with the vertical runners through water inlets, and bottom water inlets are provided at the lower part of the castings. The transverse runners are respectively connected with the bottom water inlets. The utility model reduces the number of risers, increases the number of castings, and improves the yield rate of the casting process by 13%, effectively reduces production costs, and improves production efficiency.

[0004] The shrinkage feed riser of this mold structure is arranged directly above the casting, so that the static pressure head of the molten iron is larger, the impact force and flow rate of the molten iron are fast, the speed of the molten iron pouring process is fast, and the impact force on the sand mold is large. Although a water inlet is arranged at the bottom of the casting to reduce sand hole defects, there is still a certain probability that sand holes will be generated at the bottom of the casting. However, the molten iron is easily mixed with iron slag during the casting process. This mold structure cannot filter the iron slag, and therefore also has an adverse effect on the yield rate of the automobile brake caliper casting process. Therefore, we propose a mold structure for improving the yield rate of the automobile brake caliper casting process to solve the above problems. Summary of the invention

[0005] 1. Technical issues to be resolved

[0006] In view of the deficiencies of the prior art, the present invention provides a mold structure for improving the yield of automobile brake caliper casting process, solving the problem that the molten iron flow rate block and the structure lacking slag filtration proposed in the above background technology easily cause sand hole defects in the casting.

[0007] (II) Technical solution

[0008] In order to achieve the above-mentioned purpose, the present invention specifically adopts the following technical solutions:

[0009] A mold structure for improving the yield of a casting process for an automobile brake caliper body, comprising four cavities and a pouring cup opened on the mold, wherein the lower end of the pouring cup is connected to a vertical runner, the upper end of the vertical runner is connected to a first horizontal runner, both ends of the first horizontal runner are connected to first risers, and the two first risers are respectively connected to the tops of two upper cavities, an intermediate cavity is provided in the middle of the vertical runner, and the intermediate cavity is sequentially connected to a second horizontal runner and a third horizontal runner from bottom to top, both ends of the second horizontal runner are connected to second risers, and the two second risers are respectively connected to the tops of two lower cavities, both ends of the third horizontal runner are connected to a first water inlet, and the two first water inlets are respectively connected to the bottoms of the two upper cavities, the bottom of the vertical runner is connected to a fourth horizontal runner, both ends of the fourth horizontal runner are connected to second water inlets, and the two second water inlets are respectively connected to the bottoms of the two lower cavities.

[0010] Furthermore, there is a gap between the second runner and the bottom of the middle cavity.

[0011] Furthermore, a spherical filter is provided at the connection between the vertical runner and the first horizontal runner.

[0012] Furthermore, water inlet sheets are disposed inside the first water inlet and the second water inlet.

[0013] (III) Beneficial effects

[0014] Compared with the prior art, the present invention provides a mold structure for improving the yield rate of automobile brake caliper casting process, which has the following beneficial effects:

[0015] The present invention sets an intermediate cavity and utilizes the slow flow rate of molten iron after colliding with an object. The intermediate cavity and the spherical filter are set to limit the flow rate of molten iron. The fourth horizontal runner, the second water inlet, the second horizontal runner and the second riser are set to facilitate casting of the lower cavity. The third horizontal runner, the first water inlet, the first horizontal runner and the first riser are set to facilitate casting of the upper cavity, so that sand holes are not likely to exist at the bottom of the casting after it is formed. At the same time, the setting of the spherical filter can enable iron slag to enter the bottom of the horizontal runner and the vertical runner, thereby avoiding slag holes in the casting. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a structural schematic diagram of the present invention.

[0017] In the figure: 1. Cavity; 2. Pouring cup; 3. Vertical runner; 4. First horizontal runner; 5. First riser; 6. Middle cavity; 7. Second horizontal runner; 8. Second riser; 9. Third horizontal runner; 10. First water inlet; 11. Fourth horizontal runner; 12. Second water inlet; 13. Spherical filter; 14. Water inlet sheet. 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] Example

[0020] like Figure 1 As shown, a mold structure for improving the yield rate of a casting process for an automobile brake caliper body proposed in one embodiment of the present invention comprises four cavities 1 and a pouring cup 2 opened on the mold, the lower end of the pouring cup 2 is connected with a vertical runner 3, the upper end of the vertical runner 3 is connected with a first horizontal runner 4, both ends of the first horizontal runner 4 are connected with first risers 5, the two first risers 5 are respectively connected with the tops of the two upper cavities 1, an intermediate cavity 6 is arranged in the middle of the vertical runner 3, the intermediate cavity 6 is sequentially connected with a second horizontal runner 7 and a third horizontal runner 9 from bottom to top, both ends of the second horizontal runner 7 are connected with second risers 8, the two second risers 8 are respectively connected with the tops of the two lower cavities 1, both ends of the third horizontal runner 9 are connected with first water inlets 10, the two first water inlets 10 are respectively connected with the two upper cavities The bottom of the cavity 1 is connected, the bottom of the vertical runner 3 is connected to the fourth horizontal runner 11, and both ends of the fourth horizontal runner 11 are connected to the second water inlet 12, and the two second water inlets 12 are respectively connected to the bottom of the two cavities 1 below; in summary, the molten iron flows from the pouring cup 2 into the inside of the vertical runner 3, and under the action of gravity, the molten iron will flow to the bottom of the vertical runner 3 and enter the fourth horizontal runner 11, and enter the two cavities 1 below from the second water inlet 12. Since the upper ends of the two upper cavities 1 are connected to the first riser 5, and the lower ends are connected to the first water inlet 10, at the same time, in conjunction with the setting of the middle cavity 6, the upper cavity 1 will retain molten iron only after the two lower cavities 1 are filled. By setting the first riser 5 and the second riser 8, the shrinkage compensation function can be achieved.

[0021] like Figure 1As shown, in some embodiments, there is a gap between the second horizontal runner 7 and the bottom of the middle cavity 6; by setting a gap between the second horizontal runner 7 and the bottom of the middle cavity 6, the molten iron will not directly enter the lower cavity 1 through the second riser 8 when flowing downward in the vertical runner 3, thereby preventing the molten iron from entering the lower cavity 1 too quickly, resulting in sand holes on the casting.

[0022] like Figure 1 As shown, in some embodiments, a spherical filter 13 is provided at the connection between the vertical runner 3 and the first horizontal runner 4; the spherical filter 13 mentioned here refers to a hollow sphere with filter holes evenly opened on the surface, which can allow molten iron to pass through but iron slag will be blocked. The setting of the spherical filter 13, on the one hand, plays a role in filtering the iron slag in the molten iron, and on the other hand, it also plays a role in slowing down the molten iron, so that the molten iron entering the upper cavity 1 from the first riser 5 will not have sand holes on the casting formed after solidification.

[0023] like Figure 1 As shown, in some embodiments, water inlet plates 14 are provided inside the first water inlet 10 and the second water inlet 12; the setting of the water inlet plates 14 can hinder and slow down the molten iron entering the mold cavity 1 from the water inlet, so that the molten iron is not easy to enter the mold cavity 1 more smoothly.

[0024] Finally, it should be noted that the above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art can still modify the technical solutions described in the aforementioned embodiments or replace some of the technical features therein by equivalents. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. A mold structure for improving the yield of a casting process for a brake caliper body of an automobile, comprising four cavities (1) and a pouring cup (2) provided on the mold, characterized in that: The lower end of the pouring cup (2) is connected to a vertical runner (3), the upper end of the vertical runner (3) is connected to a first horizontal runner (4), both ends of the first horizontal runner (4) are connected to first risers (5), the two first risers (5) are respectively connected to the tops of the two upper cavities (1), an intermediate cavity (6) is provided in the middle of the vertical runner (3), the intermediate cavity (6) is connected to a second horizontal runner (7) and a third horizontal runner (9) in sequence from bottom to top, both ends of the second horizontal runner (7) are connected to a second A riser (8), two second risers (8) are respectively connected to the tops of the two cavities (1) below, both ends of the third runner (9) are connected to the first water inlet (10), the two first water inlets (10) are respectively connected to the bottoms of the two cavities (1) above, the bottom of the vertical runner (3) is connected to the fourth runner (11), both ends of the fourth runner (11) are connected to the second water inlet (12), the two second water inlets (12) are respectively connected to the bottoms of the two cavities (1) below.

2. A mold structure for improving the yield rate of automobile brake caliper casting process according to claim 1, characterized in that: There is a gap between the second runner (7) and the bottom of the middle cavity (6).

3. The mold structure for improving the yield rate of automobile brake caliper casting process according to claim 1 is characterized in that: A spherical filter (13) is provided at the connection between the vertical runner (3) and the first horizontal runner (4).

4. The mold structure for improving the yield rate of automobile brake caliper casting process according to claim 1 is characterized in that: Water inlet plates (14) are provided inside the first water inlet (10) and the second water inlet (12).

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