Large thermal modulus type caliper casting model structure

Abstract

The utility model discloses a large thermal modulus type caliper casting model structure which comprises a sprue cup, the lower end of the sprue cup is communicated with a cross gate, one end, far away from the cross gate, of the cross gate is communicated with a vertical gate, the vertical gate is communicated with a water inlet piece, one end, far away from the vertical gate, of the water inlet piece is connected with a dead head, and the dead head is communicated with a casting cavity through a dead head neck. Cylinder head heat preservation blocks are arranged on the two sides of a cylinder head of the casting cavity, bridge part heat preservation blocks are arranged on the two sides of a bridge part of the casting cavity, the tip end of a claw part of the casting cavity is communicated with an overflow block, and a chilling piece is arranged at the tail of the casting cavity; according to the utility model, the riser neck with a small cross sectional area is designed, the riser neck is firstly solidified to form a closed system before a large amount of eutectic solidification of a casting, and after the eutectic solidification begins, the expansion force of graphitization is fully utilized to achieve the self-feeding effect, so that the graphite form is uniform.

Description

Technical Field

[0001] The utility model relates to the technical field of casting, in particular to a large thermal modulus type caliper casting model structure. Background Art

[0002] Automotive calipers are key components of the braking system, clamping the brake disc or drum to achieve the vehicle's braking function. Calipers are to cars what the heart is to the human body. A high-quality caliper provides stable and reliable braking performance, giving the driver greater control of the vehicle. This control not only affects daily driving comfort but also safety in emergency situations. Automotive calipers are primarily made of wear-resistant, high-strength carbon steel. Other common materials for brake calipers on the market include cast iron, aluminum alloy, and carbon fiber. Cast iron calipers are typically ductile iron, whose graphite is spherical in its metallographic structure. Good graphite quality requires uniform size and distribution. Decayed, coarse, exploded, and uneven graphite can significantly impact the strength, mechanical properties, and internal defects of the casting.

[0003] For this type of high-heat modulus caliper, traditional casting solutions require large risers, a large riser neck cross-section, and a short riser neck, resulting in slow cooling. This increases the contact heat node, which can lead to coarse grains in the riser area and sometimes shrinkage. This can also lead to insufficient molten metal filling, resulting in under-pouring, under-casting, and defects. Excessively large risers also waste molten metal. Large riser necks require sawing, making post-processing more difficult.

[0004] Therefore, a large thermal modulus type caliper casting model structure is proposed. Utility Model Content

[0005] The purpose of the present invention is to provide a large thermal modulus type caliper casting model structure, thereby solving or at least alleviating one or more of the above-mentioned problems and other problems existing in the prior art.

[0006] In order to achieve the above-mentioned purpose, the main technical solutions adopted by this utility model include:

[0007] A large thermal modulus type caliper casting model structure includes a pouring cup, the lower end of the pouring cup is connected to a horizontal runner, the end of the horizontal runner away from the horizontal runner is connected to a vertical runner, the vertical runner is connected to a water inlet plate, the end of the water inlet plate away from the vertical runner is connected to a riser, the riser is connected to a casting cavity through a riser neck, the riser is arranged in a teardrop shape, cylinder head insulation blocks are provided on both sides of the cylinder head of the casting cavity, bridge insulation blocks are provided on both sides of the bridge of the casting cavity, the tip of the claw of the casting cavity is connected to an overflow block, and the tail of the casting cavity is provided with a chilling plate.

[0008] In a large thermal modulus type caliper casting model structure according to the utility model, a filter residue sheet is provided between the horizontal runner and the vertical runner.

[0009] In a large thermal modulus type caliper casting model structure according to the utility model, the inner diameter of the upper bottom of the pouring cup is 101 mm, the inner diameter of the lower bottom is 72 mm, and the height is 53 mm.

[0010] In a large thermal modulus type caliper casting model structure according to the utility model, the cylinder head insulation block is 8 mm away from the cylinder head of the casting cavity, and the bridge insulation block is 8 mm away from the bridge of the casting cavity.

[0011] In a large thermal modulus type caliper casting model structure according to the utility model, the overflow block is 30 mm long, 17 mm wide and 20 mm high.

[0012] In a large thermal modulus type caliper casting model structure according to the utility model, wherein the cross-sectional area of the riser neck is 238mm 2 .

[0013] The chilling sheet is an iron sheet with a thickness of 2 mm.

[0014] The utility model has at least the following beneficial effects:

[0015] The riser neck has a small cross-sectional area. Before a large amount of eutectic solidifies in the casting, the riser neck solidifies first, forming a closed system. After the eutectic solidifies, the expansion force of graphitization is fully utilized to achieve a self-feeding effect, making the graphite morphology uniform. The riser is set in a water drop shape, which slows down the cooling rate, promotes the refinement of the graphite matrix, and makes the casting crystallize according to the Fe-G phase diagram. The volume of the riser is reduced, and the waste of molten metal is reduced, thereby reducing production costs.

[0016] Adding a bridge insulation block at the bridge position of the casting cavity and a cylinder head insulation block at the cylinder head position of the casting cavity can maintain the temperature of the bridge and the cylinder head during casting, ensuring the uniformity of the metallographic structure inside the casting. An overflow block is added to the tip of the claw of the casting cavity to avoid incomplete graphite growth and irregular graphite morphology caused by low temperature. The chiller at the tail position can accelerate the cooling of the tail. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] The drawings described herein are used to provide a further understanding of the present application and constitute a part of the present application. The illustrative embodiments of the present application and their descriptions are used to explain the present application and do not constitute an improper limitation on the present application. In the drawings:

[0018] Figure 1This is a structural diagram of the casting model structure of a large thermal modulus caliper of the utility model.

[0019] Description of Figure Numbers:

[0020] 1. Sprue cup; 2. Horizontal runner; 3. Filter plate; 4. Vertical runner; 5. Water inlet plate; 6. Riser; 7. Riser neck; 8. Cylinder head insulation block; 9. Casting; 10. Bridge insulation block; 11. Overflow block; 12. Chilling plate. DETAILED DESCRIPTION

[0021] The following will describe the implementation methods of the present application in detail with reference to the accompanying drawings and examples, so that the implementation process of how the present application applies technical means to solve technical problems and achieve technical effects can be fully understood and implemented accordingly.

[0022] Please refer to Figure 1 As shown, the embodiment of the present invention provides a large thermal modulus type caliper casting model structure, including a pouring cup 1, the pouring cup 1 has an upper bottom inner diameter of 101mm, a lower bottom inner diameter of 72mm, and a height of 53mm. The lower end of the pouring cup 1 is connected to a runner 2, and the cross-sectional area of the runner 2 is 340mm. 2 The end of the horizontal runner 2 away from the horizontal runner 2 is connected to the vertical runner 4, and the cross-sectional area of the vertical runner 4 is 190mm 2 The vertical runner 4 is connected to a water inlet 5, and the end of the water inlet 5 away from the vertical runner 4 is connected to a riser 6. The riser 6 is connected to the casting cavity 9 through the riser neck 7. The cross-sectional area of the riser neck 7 is 238mm 2 The cross-sectional area of the riser neck 7 is small. Before a large amount of eutectic solidifies in the casting, the riser neck 7 solidifies first, forming a closed system. After the eutectic solidifies, the expansion force of graphitization is fully utilized to achieve the effect of self-compensation.

[0023] The riser 6 is in a teardrop shape, which can slow down the cooling rate, promote the refinement of the graphite matrix, make the casting crystallize according to the Fe-G phase diagram, reduce the riser volume, reduce the waste of molten metal, and thus reduce production costs;

[0024] Cylinder head insulation blocks 8 are provided on both sides of the cylinder head of the casting cavity 9, and bridge insulation blocks 10 are provided on both sides of the bridge part of the casting cavity 9. In the embodiment, the cylinder head insulation block 8 is 8 mm away from the cylinder head of the casting cavity 9, and the bridge insulation block 10 is 8 mm away from the bridge part of the casting cavity 9. The tip of the claw part of the casting cavity 9 is connected to the overflow block 11, and the overflow block 11 is 30 mm long, 17 mm wide and 20 mm high. The tail of the casting cavity 9 is provided with a chilling plate 12, which is an iron plate with a thickness of 2 mm.

[0025] By adding a bridge insulation block 10 at the bridge position of the casting cavity 9 and a cylinder head insulation block 8 at the cylinder head position of the casting cavity 9, the temperature of the bridge and the cylinder head can be maintained during casting, ensuring the uniformity of the metallographic structure inside the casting. An overflow block 11 is added to the tip of the claw of the casting cavity 9 to avoid incomplete graphite growth and irregular graphite morphology due to low temperature. The chiller 12 at the tail position can accelerate the cooling of the tail.

[0026] In this embodiment, a filter residue sheet 3 is provided between the horizontal runner 2 and the vertical runner 4 , and the filter residue sheet 3 is a 50 mm×50 mm square structure.

[0027] Working principle: molten iron enters from the pouring cup 1, and the residual impurities in the molten iron are filtered out by the filter residue sheet 3. The clean molten iron enters the riser 6 through the water inlet sheet 5, and then flows into the casting cavity 9. The hot riser can compensate for the shrinkage of the casting, and the molten iron is evenly punched into the mold. The overflow block 11 added to the tip of the claw of the casting cavity 9 can keep this part warm to avoid incomplete graphite growth and irregular graphite morphology caused by low temperature. The chilling sheet 12 at the tail position can accelerate the cooling of the tail.

[0028] The above description shows and describes several preferred embodiments of the present invention. However, as previously mentioned, it should be understood that the present invention is not limited to the form disclosed herein and should not be construed as excluding other embodiments. Instead, the present invention can be used in various other combinations, modifications, and environments and can be modified within the scope of the present invention as taught herein or through the techniques or knowledge in the relevant field. Modifications and variations made by those skilled in the art that do not depart from the spirit and scope of the present invention are intended to be protected by the claims appended hereto.

Claims

1. A high thermal modulus type caliper casting model structure, characterized in that: The invention comprises a pouring cup (1), wherein the lower end of the pouring cup (1) is connected to a horizontal runner (2), the end of the horizontal runner (2) away from the horizontal runner (2) is connected to a vertical runner (4), the vertical runner (4) is connected to a water inlet plate (5), the end of the water inlet plate (5) away from the vertical runner (4) is connected to a riser (6), the riser (6) is connected to a casting cavity (9) through a riser neck (7), the riser (6) is arranged in a water drop shape, cylinder head insulation blocks (8) are arranged on both sides of the cylinder head of the casting cavity (9), bridge insulation blocks (10) are arranged on both sides of the bridge of the casting cavity (9), the tip of the claw of the casting cavity (9) is connected to an overflow block (11), and the tail of the casting cavity (9) is provided with a chilling plate (12).

2. A high thermal modulus caliper casting mold structure according to claim 1, characterized in that: A filter residue sheet (3) is provided between the horizontal runner (2) and the vertical runner (4).

3. The high thermal modulus caliper casting mold structure according to claim 2, characterized in that: The pouring cup (1) has an upper bottom inner diameter of 101 mm, a lower bottom inner diameter of 72 mm, and a height of 53 mm.

4. The high thermal modulus caliper casting mold structure according to claim 3, characterized in that: The cylinder head heat preservation block (8) is 8 mm away from the cylinder head of the casting cavity (9), and the bridge heat preservation block (10) is 8 mm away from the bridge of the casting cavity (9).

5. The high thermal modulus caliper casting mold structure according to claim 1, characterized in that: The overflow block (11) is 30 mm long, 17 mm wide and 20 mm high.

6. The high thermal modulus caliper casting mold structure according to claim 1, characterized in that: The cross-sectional area of the riser neck (7) is 238 mm 2 .

7. The high thermal modulus caliper casting mold structure according to claim 1, characterized in that: The chilling sheet (12) is an iron sheet with a thickness of 2 mm.

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