Exhaust structure for turbocharger shell during casting

Abstract

The utility model discloses a structure for exhausting during casting of a turbocharger shell. The structure comprises a mold, uniformly distributed exhaust needles are arranged on the upper surface of the mold, the mold is movably sleeved with a sand shell, the exhaust needles extend into the sand shell, the exhaust needles are conical exhaust needles, the diameter of the top ends of the exhaust needles is smaller than that of the bottom ends of the exhaust needles, the diameter of the top ends of the exhaust needles is 1-2 mm, the diameter of the bottom ends of the exhaust needles is 2-3 mm, and the thickness of the sand shell at the top ends of the exhaust needles is 2 mm; according to the structure for exhausting during casting of the turbocharger shell, a plurality of needle-shaped exhausting devices are manufactured on a core shell manufacturing mold and are integrally formed along with a sand core during core manufacturing, and gas is exhausted from the needle-shaped exhausting devices during pouring, so that the defect of air holes easily formed in the position which cannot be covered by a dead head is overcome, the covering area is large, the exhausting effect is good, and the cost is low. And under the condition that the yield of the turbocharger shell is not reduced, the air hole defect of a casting can be overcome, and then the good using effect is achieved.

Description

Technical Field

[0001] The utility model relates to the technical field of turbocharger processing, in particular to a structure used for exhausting the turbocharger housing during casting. Background Art

[0002] With the progress of society, turbochargers have been widely used in many fields, such as automobiles, internal combustion locomotives, etc. Turbochargers are generally composed of turbines, compressors and housings. Turbocharger housings are thin-walled parts during casting. In order to prevent cold shut defects, they need to be cast quickly, which often leads to increased air pressure in the cavity. The exhaust is not enough, resulting in porosity defects at the final filling point of the casting, which leads to the scrapping of the casting. Exhaust cores are usually added at the pore position. The number of exhaust cores is small, the coverage area is small, and the exhaust effect is poor. Utility Model Content

[0003] The technical problem to be solved by the utility model is to overcome the existing defects and provide a structure for exhausting the turbocharger housing during casting. A plurality of needle-shaped exhaust devices are made on a core shell mold, which are formed integrally with the sand core during core making. During casting, gas is discharged from the needle-shaped exhaust devices. The coverage area is large and the exhaust effect is good, which can effectively solve the problems in the background technology.

[0004] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: a structure for exhausting a turbocharger housing during casting, comprising a mold;

[0005] Mould: Its upper surface is provided with evenly distributed exhaust needles, the outer movable sleeve of the mould is provided with a sand shell, the exhaust needles are extended to the inside of the sand shell, and a plurality of needle-shaped exhaust devices are made on the core shell mould, which are formed integrally with the sand core during core making, and the gas is discharged from the needle-shaped exhaust device during pouring, thereby solving the pore defects that are easy to appear in the positions that the riser cannot cover. The large coverage area has a good exhaust effect, which can solve the pore defects of the casting without reducing the output rate of the turbocharger housing, and thus has a good use effect.

[0006] Furthermore, the exhaust needle is a conical exhaust needle, and the diameter of the top end is smaller than the diameter of the bottom end, so as to facilitate demoulding of the sand shell.

[0007] Furthermore, the diameter of the top end of the exhaust needle is 1-2 mm, and the diameter of the bottom end of the exhaust needle is 2-3 mm. The smaller diameter facilitates the removal of the needle-shaped protrusions of the casting.

[0008] Furthermore, the thickness of the sand shell at the top of the exhaust needle is 2 mm, which has a good ventilation effect and will not cause spark leakage.

[0009] Compared with the prior art, the utility model has the following beneficial effects: the structure for exhausting the turbocharger housing during casting has the following advantages:

[0010] A number of exhaust needles are embedded on the plane position corresponding to the air outlet of the casting on the mold. The bottom diameter is 2-3mm, the top diameter is 1-2mm, and the top of the exhaust needle is covered with 2mm of sand. During pouring, the molten metal will enter the inside of the sand shell, and the turbocharger housing is formed inside the cavity formed by the mold. The pinhole formed by the exhaust needle can continuously exhaust through the gap between the sand. The top is covered with 2mm of sand to ensure that there will be no spark during pouring. A number of needle-shaped exhaust devices are made on the core shell mold. They are formed integrally with the sand core during core making. During pouring, the gas is discharged from the needle-shaped exhaust device, which has a large coverage area and a good exhaust effect, thereby solving the pore defects that are easy to appear in the position that the riser cannot cover, and can solve the pore defects of the casting without reducing the output rate of the turbocharger housing, thereby having a good use effect. BRIEF DESCRIPTION OF THE DRAWINGS

[0011] Figure 1 It is a schematic diagram of the structure of the utility model;

[0012] Figure 2 It is a structural schematic diagram of the mold of the utility model.

[0013] In the figure: 1 mold, 2 exhaust needle, 3 sand shell. DETAILED DESCRIPTION

[0014] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0015] See also Figure 1-2 , This embodiment provides a technical solution: a structure for exhausting a turbocharger housing during casting, comprising a mold 1;

[0016] Mold 1: Its upper surface is provided with evenly distributed exhaust needles 2, and the outer movable sleeve of the mold 1 is provided with a sand shell 3. The exhaust needles 2 extend to the inside of the sand shell 3. During pouring, the molten metal will enter the inside of the sand shell 3, and a turbocharger housing is formed inside the cavity formed by the mold 1. The pinhole formed by the exhaust needle 2 can continuously exhaust through the gap between the sands. The exhaust needle 2 is a conical exhaust needle, and the top diameter is smaller than the bottom diameter, which is convenient for demolding the sand shell 3. The top diameter of the exhaust needle 2 is 1-2 mm, and the bottom diameter of the exhaust needle 2 is 2-3 mm, which has a good ventilation effect. The small diameter facilitates the removal of the needle-like protrusions of the casting. The thickness of the sand shell 3 at the top of the exhaust needle 2 is 2 mm, which ensures that there will be no sparking during pouring.

[0017] The utility model provides a structure for exhausting a turbocharger housing during casting, and the working principle is as follows: a plurality of exhaust needles 2 are inlaid at the plane position corresponding to the air outlet of the casting on the mold 1, the bottom diameter is 2-3mm, the top diameter is 1-2mm, and the top of the exhaust needle 2 is covered with 2mm of sand. During pouring, the molten metal will enter the interior of the sand shell 3, and the turbocharger housing is formed inside the cavity formed by the mold 1. The pinhole formed by the exhaust needle 2 can continuously exhaust through the gap between the sands. The 2mm sand covering on the top ensures that there will be no sparking during pouring, thereby achieving good casting quality. After the pouring is completed, the needle-shaped protrusions on the casting can be removed together with the cutting of the riser when cleaning the casting.

[0018] The above description is only an embodiment of the present invention, and does not limit the patent scope of the present invention. Any equivalent structure or equivalent process transformation made by using the contents of the specification and drawings of the present invention, or directly or indirectly applied in other related technical fields, are also included in the patent protection scope of the present invention.

Claims

1. A structure for exhausting a turbocharger housing during casting, characterized in that: comprising a mold (1); The mold (1) has evenly distributed exhaust needles (2) on its upper surface, and a sand shell (3) is provided on the outer movable sleeve of the mold (1), and the exhaust needles (2) all extend to the inside of the sand shell (3).

2. The structure for exhausting the turbocharger housing during casting according to claim 1, characterized in that: The exhaust needle (2) is a conical exhaust needle, and the diameter of the top end is smaller than the diameter of the bottom end.

3. The structure for exhausting the turbocharger housing during casting according to claim 1, characterized in that: The diameter of the top end of the exhaust needle (2) is 1-2 mm, and the diameter of the bottom end of the exhaust needle (2) is 2-3 mm.

4. The structure for exhausting the turbocharger housing during casting according to claim 1, characterized in that: The thickness of the sand shell (3) at the top end of the exhaust needle (2) is 2 mm.

Images