Casting mold for reducing cementite defects of thick and large caliper body

Abstract

The utility model relates to a casting mold for reducing cementite defects of a thick and large caliper body, which adopts vertical line arrangement and sequentially comprises a pouring cup, a first cross gate and a straight gate from top to bottom, the bottom of the straight gate is connected with a second cross gate, the tail end of the second cross gate is provided with an inner pouring gate, the upper end of the inner pouring gate is connected with a casting mold of the caliper body, and the casting mold is connected with a casting mold of the caliper body. The casting model is arranged along a horizontal position, the side surface of the casting model is connected with a main riser, the main riser is connected with a cylinder body part of the casting model, the top of the casting model is connected with an auxiliary riser, and a top support lug of the casting model is connected with an overflow riser; the casting feeding device is suitable for production of thick and large caliper castings, the two risers are arranged, the overflow risers are additionally arranged at the supporting lugs, it is guaranteed that the castings are completely fed, shrinkage porosity is avoided, the cementite defect is avoided, and the product quality is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of casting, in particular to a casting mould for reducing cementite defects of a thick and large caliper body. Background Art

[0002] The caliper body is one of the main parts of the automobile hydraulic disc brake. After processing, it is used in conjunction with the brake piston, brake disc, friction plate, caliper bracket, etc. The caliper body is used for automobile braking and is directly related to the safety performance of the automobile. Therefore, the design standards of the caliper body have very strict requirements.

[0003] The wall thickness of the large caliper is relatively thick, and the smallest part is more than 25mm. The shrinkage requirements are high. The conventional production line uses one mold and two pieces to be arranged vertically for shrinkage compensation. The cylinder head is facing down, and the hook is at the top. The effective length of shrinkage compensation is not enough. The riser is too large to compensate for the shrinkage in the middle and the bottom of the cylinder. The hook part must be assembled like a lug, and the support shaft cannot be separated from the riser. The lug is also prone to cementite, so it is impossible to ensure that the thick and large caliper has stable performance and size. Summary of the invention

[0004] The purpose of the utility model is to solve the problems existing in the above-mentioned prior art and to provide a casting mold for reducing cementite defects for thick and large caliper bodies, thereby improving grinding efficiency and ensuring grinding accuracy.

[0005] The specific scheme of the utility model is: a casting mold for reducing cementite defects of a thick caliper body, which is arranged in a vertical line and comprises a pouring cup, a first cross runner, and a straight runner from top to bottom, the bottom of the straight runner is connected to a second cross runner, the end of the second cross runner is provided with an inner gate, the upper end of the inner gate is connected to a casting model of the caliper body, the casting model is arranged in a horizontal position, the side of the casting model is connected to a main riser, the main riser is connected to the cylinder part of the casting model, the top of the casting model is connected to an auxiliary riser, and the top ear of the casting model is connected to an overflow riser.

[0006] Furthermore, a second cross runner is connected to each side of the bottom of the straight runner, and an inner gate is provided at the end of each cross runner. The upper end of each inner gate is connected to a casting model, and the two casting models are connected to a main riser on one side facing the straight runner, and the main riser is connected to the cylinder part of the corresponding casting model, and the hook part of the casting model is arranged toward the outside.

[0007] Furthermore, a pressing edge is provided between the first horizontal runner and the vertical runner.

[0008] Furthermore, a pressing edge is provided between the straight runner and the second cross runner.

[0009] Furthermore, the main riser body is cylindrical, and a cone is provided on the top of the cylinder.

[0010] Furthermore, the auxiliary riser is a sphere, and the overflow riser is a cone.

[0011] Furthermore, a connecting runner is provided between the overflow riser and the casting model.

[0012] Compared with the prior art, the utility model has the following advantages: two risers are arranged on each casting and overflow risers are added at the lugs, so as to ensure that the casting is fully compensated for shrinkage and has no shrinkage, avoid cementite defects, and improve the quality stability of mass production of castings. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 It is a three-dimensional structural schematic diagram of the utility model;

[0014] Figure 2 It is a three-dimensional schematic diagram of another viewing angle of the utility model;

[0015] Figure 3 It is the front view of the utility model;

[0016] In the figure: 1. pouring cup; 2. first horizontal runner; 3. horizontal runner edge; 4. straight runner; 5. straight runner edge; 6. second horizontal runner; 7. inner gate; 8. casting model; 9. auxiliary riser; 10. overflow riser; 11. connecting runner; 12. main riser. DETAILED DESCRIPTION

[0017] See also Figure 1-3 The present embodiment is a casting mold for reducing cementite defects of a thick caliper body, which is arranged in a vertical line and includes a pouring cup 1, a first runner 2, and a sprue 4 from top to bottom. The bottom of the sprue 4 is connected to a second runner 6 on both sides, and each end of the second runner 6 is provided with an inner gate 7. The upper end of each inner gate 7 is connected to a casting model 8. The two casting models 8 are connected to a main riser 12 on one side facing the sprue 4. The main riser 12 is connected to the cylinder part of the corresponding casting model 8. The hook portion of the casting model 8 is arranged in a horizontal position toward the outside, and the main riser 12 can compensate for the shrinkage of the cylinder area and the thick and large portion in the middle of the double cylinder; the tops of the two casting models 8 are connected with auxiliary risers 9, and the top ears of the two casting models 8 are connected with overflow risers 10. The overflow risers 10 can prevent cold iron water from gathering at the ears. A connecting runner 11 is provided between the overflow riser 10 and the casting model 8. The thickness of the connecting runner 11 is relatively thin, and the overflow riser 10 of the produced casting product can be easily broken, which is convenient for cleaning.

[0018] Furthermore, a runner edge 3 is provided between the first runner 2 and the sprue 4 .

[0019] Furthermore, a sprue 4 pressing edge is provided between the sprue 4 and the second runner 6 .

[0020] Furthermore, the main riser 12 is cylindrical in shape, and a cone is disposed on the top of the cylinder.

[0021] Furthermore, the auxiliary riser 9 is a sphere, and the overflow riser 10 is a cone.

[0022] The sand mold is made by using the mold of the utility model, and one mold has two pieces.

[0023] After pouring is completed, when the molten iron in the pouring cavity cools down, the molten iron in the main riser 12 compensates the shrinkage of the cylinder body; the molten iron in the auxiliary riser 9 mainly compensates the shrinkage of the hook claw part, and a small amount of molten iron in the overflow riser 10 compensates the shrinkage of the upper ear; the casting is compensated for shrinkage through three risers to avoid the production of cementite, thereby improving the quality stability of the product.

Claims

1. A casting mold for reducing cementite defects in thick caliper bodies, characterized by: A vertical line arrangement is adopted, and from top to bottom, it includes a pouring cup, a first horizontal runner, and a straight runner. The bottom of the straight runner is connected to a second horizontal runner, and an inner gate is provided at the end of the second horizontal runner. The upper end of the inner gate is connected to a casting model of a caliper body. The casting model is arranged in a horizontal position, and a main riser is connected to the side of the casting model. The main riser is connected to the cylinder part of the casting model, and the top of the casting model is connected to an auxiliary riser. The top ear of the casting model is connected to an overflow riser.

2. A casting mold for reducing cementite defects for thick caliper body according to claim 1, characterized in that: A second cross runner is connected to both sides of the bottom of the straight runner, and an inner gate is provided at the end of each cross runner. The upper end of each inner gate is connected to a casting model. The two casting models are connected to main risers on one side facing the straight runner, and the main risers are connected to the cylinder body part of the corresponding casting model, and the hook part of the casting model is arranged to face outward.

3. A casting mold for reducing cementite defects for thick caliper body according to claim 1, characterized in that: A pressing edge is provided between the first horizontal runner and the straight runner.

4. The casting mold for reducing cementite defects of thick caliper body according to claim 1, characterized in that: A pressing edge is provided between the straight runner and the second cross runner.

5. The casting mold for reducing cementite defects of thick caliper body according to claim 1, characterized in that: The main riser body is cylindrical, and a cone is arranged on the top of the cylinder.

6. The casting mold for reducing cementite defects of thick caliper body according to claim 1, characterized in that: The auxiliary riser is a sphere, and the overflow riser is a cone.

7. The casting mold for reducing cementite defects of thick caliper body according to claim 1, characterized in that: A connecting runner is provided between the overflow riser and the casting model.

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