Low-pressure casting device for direct mold filling flywheel casing

Abstract

The utility model discloses a low-pressure casting device for a direct mold filling flywheel casing, and belongs to the technical field of casting of automobile parts. A low-pressure casting device for a direct mold filling flywheel casing comprises a mold piece composed of a lower mold, a side mold and an upper mold, a mold core is arranged in the mold, a mold cavity is formed among the mold core, the lower mold, the side mold and the upper mold, and the low-pressure casting device further comprises a transition connecting device arranged on the lower mold. The transition connecting device is provided with a liquid inlet, a transition cavity and at least two groups of sprue gates, and the transition cavity is communicated with the mold cavity through the sprue gates; according to the utility model, through the arrangement of the transition connecting device, a pouring channel is omitted, a product is directly molded by pouring, solution materials in the pouring gate are saved, and the yield of the product is improved.

Description

TECHNICAL FIELD

[0001] The utility model relates to the field of automobile parts casting technology, especially to a low-pressure casting device of direct filling flywheel housing. BACKGROUND

[0002] Flywheel housing is installed between engine and gearbox, and is connected with crankcase, and is internally provided with flywheel assembly, starter, oil pan and the like; the flywheel housing is currently mostly made of aluminum casting, is light in weight and is not prone to deformation, bears the product quality of the gearbox, and plays the role of power transmission support point;

[0003] The existing aluminum flywheel housing mostly adopts low-pressure casting process of straight sprue and horizontal sprue during casting, the process needs to set more large risers to separately shrinkage dispersed hot spots, and due to the thin wall thickness of the flywheel housing, the straight sprue and horizontal sprue cause low process yield, large and difficult post-riser removal work, and difficult filling. UTILITY MODEL CONTENTS

[0004] The utility model aims at solving the problems in the background art, and provides a low-pressure casting device of direct filling flywheel housing.

[0005] In order to achieve the above-mentioned purpose, the utility model adopts the following technical scheme:

[0006] A low-pressure casting device of direct filling flywheel housing, comprising a mold piece composed of a lower mold, a side mold and an upper mold, a mold core is arranged in the mold, a mold cavity is formed between the mold core and the lower mold, the side mold and the upper mold, a transition connecting device is arranged on the lower mold, a liquid inlet, a transition cavity and a pouring opening are arranged on the transition connecting device, the transition cavity is connected with the mold cavity through the pouring opening, and at least two groups of pouring openings are arranged.

[0007] Preferably, the pouring opening is provided with six groups.

[0008] Preferably, a base, a sealed furnace and a heat preservation furnace for storing solution are further included, the mold piece is arranged on the base, the sealed furnace is provided with an air inlet, the heat preservation furnace is arranged in the sealed furnace, the upper end of the heat preservation furnace is connected with the sealed furnace, and the heat preservation furnace is connected with the liquid inlet through a liquid lifting pipe.

[0009] Preferably, a hydraulic cylinder is fixedly connected to the base, and the telescopic end of the hydraulic cylinder is fixedly connected with the upper mold.

[0010] Preferably, the lower end of the liquid lifting pipe is located below the solution liquid level.

[0011] Preferably, a liquid inlet pipe is fixedly connected to the heat preservation furnace, and the liquid inlet pipe extends to the outside of the sealed furnace through the side wall of the sealed furnace.

[0012] Preferably, the air charging part is further provided for supplying air to the air inlet.

[0013] Preferably, the air charged by the air charging part is a protective gas.

[0014] Compared with the prior art, the low-pressure casting device for directly filling the flywheel shell has the following beneficial effects:

[0015] The parts not involved in the device are the same as or can be realized by the prior art, and the low-pressure casting device for directly filling the flywheel shell is provided with a transition connecting device, which saves the pouring channel, directly pours the product, saves the solution material in the pouring channel, and improves the product yield. BRIEF DESCRIPTION OF DRAWINGS

[0016] Figure 1 The structure diagram of the low-pressure casting device for directly filling the flywheel shell is provided.

[0017] Figure 2 The structure diagram of the low-pressure casting device for directly filling the flywheel shell is provided.

[0018] Figure 3 The position structure diagram of the pouring port of the low-pressure casting device for directly filling the flywheel shell is provided.

[0019] Figure 4 The structure diagram of the transition connecting device of the low-pressure casting device for directly filling the flywheel shell is provided.

[0020] In the figure: 1, base; 101, hydraulic cylinder; 2, sealed furnace; 201, air inlet; 3, heat preservation furnace; 301, liquid inlet pipe; 4, liquid lifting pipe; 5, mold cavity; 6, lower mold; 7, side mold; 8, upper mold; 9, transition connecting device; 901, liquid inlet; 902, transition cavity; 903, pouring port. DETAILED DESCRIPTION

[0021] The technical solutions in the embodiments of the present application will be described clearly and completely below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, not all the embodiments.

[0022] Embodiment 1:

[0023] Reference Figures 1-4The application discloses a low-pressure casting device for directly filling a flywheel shell, which comprises a mold piece composed of a lower mold 6, a side mold 7 and an upper mold 8, a mold core is arranged in the mold, a mold cavity 5 is formed between the mold core and the lower mold 6, the side mold 7 and the upper mold 8, a transition connecting device 9 is arranged on the lower mold 6, a liquid inlet 901, a transition cavity 902 and a pouring opening 903 are arranged on the transition connecting device 9, the transition cavity 902 is communicated with the mold cavity 5 through the pouring opening 903, and at least two groups of the pouring opening 903 are arranged. Figure 3 The pouring opening 903 is arranged in six groups, and the six groups of the pouring opening 903 correspond to the flywheel cavity end annular surface of the flywheel shell without a weight-reducing groove, and the arrangement of the pouring opening 903 is more convenient for the pouring and filling of the flywheel shell.

[0024] Embodiment 2

[0025] Referring to Figures 1-4 The low-pressure casting device for directly filling a flywheel shell is basically the same as that in the embodiment 1, and further comprises a base 1, a sealed furnace 2 and a heat preservation furnace 3 used for storing a solution, the mold piece is arranged on the base 1, the sealed furnace 2 is provided with an air inlet 201, the heat preservation furnace 3 is located in the sealed furnace 2, the upper end of the heat preservation furnace 3 is communicated with the sealed furnace 2, the heat preservation furnace 3 is communicated with the liquid inlet 901 through a liquid lifting pipe 4, and the base 1 is fixedly connected with a hydraulic cylinder 101, and the telescopic end of the hydraulic cylinder 101 is fixedly connected with the upper mold 8.

[0026] The lower end of the liquid lifting pipe 4 is located below the upper end of the solution liquid surface, when the protective gas pressure above the solution liquid surface is large, the solution can be squeezed into the liquid lifting pipe 4, so that the gas is prevented from entering the mold cavity 5.

[0027] The heat preservation furnace 3 is fixedly connected with a liquid inlet pipe 301, the liquid inlet pipe 301 extends to the outside of the sealed furnace 2 through the side wall of the sealed furnace 2; the device further comprises a gas filling part, the gas filling part is used for supplying gas to the air inlet 201; the gas filled by the gas filling part is protective gas, and specifically, the protective gas is dry air.

[0028] When the device is used, the upper mold 8 is covered on the lower mold 6 through the hydraulic cylinder 101 and the hydraulic cylinder 101 to form the mold cavity 5;

[0029] At this time, the aluminum solution is added into the heat preservation furnace 3 through the liquid inlet pipe 301, and the height of the aluminum solution is higher than the height of the bottom of the liquid lifting pipe 4, and the liquid inlet pipe 301 is sealed and closed;

[0030] At this time, dry air is filled into the sealed furnace 2 through the air inlet 201, so that the pressure in the sealed furnace 2 gradually rises, at this time, the gas will extrude the heat preservation furnace 3 with the upper end opening, under the action of the gas pressure, the molten aluminum in the heat preservation furnace 3 enters the transition connecting device 9 through the liquid lifting pipe 4 and the liquid inlet 901, and enters the mold cavity 5 through the six pouring ports 903 on the transition connecting device 9, when the solution drops to a specified height, the molten aluminum solution fills the mold cavity 5, at this time, the air inlet 201 is closed to stop filling air into the sealed furnace 2, under the condition of constant pressure, the molten aluminum is solidified and formed;

[0031] When the casting is completed, the air inlet 201 is opened, so that the air pressure in the sealed furnace 2 returns to the normal value, and the residual un-solidified liquid in the liquid lifting pipe 4 and the transition connecting device 9 flows back to the heat preservation furnace 3, so as to be used next time, and the use amount of the molten aluminum is saved;

[0032] At this time, the upper die 8 and the lower die 6 are separated through the hydraulic cylinder 101, the casting is taken out, and the residual part remaining in the pouring port 903 after the liquid lifting and pressure maintaining is removed through the cutting device (the feeding function), so as to obtain the flywheel shell blank;

[0033] The transition connecting device 9 is arranged, the sprue and the runner are omitted, the product is directly formed, the solution material in the sprue and the runner is saved, and the yield of the product is improved.

[0034] The above is only a preferred specific embodiment of the utility model, but the protection scope of the utility model is not limited to this, any skilled person in the art can make equivalent replacement or change according to the technical scheme and the utility model concept of the utility model within the technical range disclosed by the utility model, which should be covered in the protection scope of the utility model.

Claims

1. A low pressure casting device for direct filling of a flywheel shell, comprising a mold piece consisting of a lower mold (6), a side mold (7), and an upper mold (8), a mold core being provided in the mold, a mold cavity (5) being formed between the mold core and the lower mold (6), the side mold (7), and the upper mold (8), characterized in that, The transition connecting device (9) is arranged on the lower mold (6), and the transition connecting device (9) is provided with a liquid inlet (901), a transition cavity (902) and a pouring opening (903); the transition cavity (902) is communicated with the mold cavity (5) through the pouring opening (903); and the pouring opening (903) is provided with at least two groups.

2. The apparatus for low pressure casting of a direct fill flywheel shell of claim 1, wherein, The pouring opening (903) is provided with six groups.

3. The apparatus for low pressure casting of direct fill flywheel housing of claim 1, wherein, The base (1), the sealed furnace (2) and the heat preservation furnace (3) for storing solution are further included; the mold part is arranged on the base (1); the sealed furnace (2) is provided with an air inlet (201); the heat preservation furnace (3) is located in the sealed furnace (2); the upper end of the heat preservation furnace (3) is communicated with the sealed furnace (2); and the heat preservation furnace (3) is communicated with the liquid inlet (901) through the liquid lifting pipe (4).

4. The apparatus for low pressure casting of a direct fill flywheel shell of claim 3, wherein, The hydraulic cylinder (101) is fixedly connected to the base (1), and the telescopic end of the hydraulic cylinder (101) is fixedly connected with the upper mold (8).

5. The apparatus for low pressure casting of a direct fill flywheel shell of claim 3, wherein, The lower end of the liquid lifting pipe (4) is located below the solution liquid level.

6. The apparatus for low pressure casting of a direct fill flywheel shell of claim 5, wherein, The liquid inlet pipe (301) is fixedly connected to the heat preservation furnace (3) and extends to the outside of the sealed furnace (2) through the side wall of the sealed furnace (2).

7. The apparatus for low pressure casting of a direct fill flywheel shell of claim 3, wherein, The air charging part is further included for supplying air to the air inlet (201).

8. The apparatus for low pressure casting of a direct fill flywheel shell of claim 7, wherein, The gas charged by the air charging part is a protective gas.

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