CN214768849U

CN214768849U - Differential pressure casting equipment of double-circuit type of admitting air

Info

Publication number: CN214768849U
Application number: CN202023038866.1U
Authority: CN
Inventors: 殷敏; 刘后尧; 黄剑杰; 黄路平; 覃仕春
Original assignee: Danyang Rongjia Precision Machinery Co ltd
Current assignee: Danyang Rongjia Precision Machinery Co ltd
Priority date: 2020-12-17
Filing date: 2020-12-17
Publication date: 2021-11-19
Anticipated expiration: 2030-12-17

Abstract

The utility model provides a differential pressure casting equipment of double-circuit type of admitting air, includes jar and lower jar, is equipped with the casting mould in the jar of going up, is equipped with the aluminium water pitcher in the lower jar, aluminium water pitcher and casting mould between link to each other through the aluminium water pipeline, last jar link to each other with first trachea, the lower jar links to each other with the second trachea, first trachea link to each other with first pipeline and second pipeline simultaneously. This differential pressure casting equipment is admitted air into two ways with the one way of admitting air of using always, in whole differential pressure casting process, has improved the efficiency that differential pressure admitted air for the atmospheric pressure in the upper tank is adjusted more easily, has solved under the negative pressure condition differential pressure casting equipment and can only carry out the work of exhausting through core vent and reticulation thereby leads to the not enough technological problem of exhaust effect.

Description

Differential pressure casting equipment of double-circuit type of admitting air

Technical Field

The utility model belongs to the technical field of the casting, a differential pressure casting equipment of double-circuit type of admitting air is related to.

Background

Counter-pressure casting is also known as counter-pressure casting and differential pressure casting. On the basis of low-pressure casting, a sealing cover is covered on the casting mould, and compressed air is introduced into a heat-insulating furnace and the sealing cover, but the pressure in the heat-insulating furnace is slightly higher, so that molten metal in a crucible in the heat-insulating furnace is filled into the casting mould through a liquid-lifting pipe under the action of pressure difference, and the molten metal is crystallized under the pressure. It is a combination of two casting methods of low pressure casting and crystallization under pressure. However, the holding furnace of the differential pressure casting equipment and the air inlet pipeline of the sealing cover are usually one, so that when the pressure in the sealing cover is adjusted, air in the air inlet pipeline connected with the sealing cover can generate convection, the surface quality of a product manufactured by differential pressure casting is defective, and the normal use of the differential pressure casting equipment is seriously influenced.

SUMMERY OF THE UTILITY MODEL

The utility model aims at solving the not enough of current problem, provide a differential pressure casting equipment of double-circuit type of admitting air, including last jar and lower jar, be equipped with the casting mould in the last jar, be equipped with the aluminium water pitcher in the lower jar, aluminium water pitcher and casting mould between link to each other through the aluminium water pipeline, last jar link to each other with first trachea, the lower jar links to each other with the second trachea, first trachea link to each other with first pipeline and second pipeline simultaneously, first pipeline and second pipeline on be equipped with negative pressure relay and malleation relay respectively.

In order to maintain the temperature of the molten aluminum, a heating device is further arranged below the molten aluminum tank.

In order to conveniently and timely supplement the aluminum water in the aluminum water tank by operators, a residual detector is arranged in the aluminum water tank.

Furthermore, the first pipeline and the second pipeline are respectively provided with a pressure sensor, and the pressure sensors can display a positive pressure value and a negative pressure value.

Further, the negative pressure relay is a time relay.

Further, the positive voltage relay is a time relay.

Has the advantages that: the utility model discloses a differential pressure casting equipment of double-circuit type of admitting air, compare in current differential pressure casting equipment, this differential pressure casting equipment is changed into two tunnel with the all the way air intake commonly used and is admitted air, in whole differential pressure casting in-process, the efficiency that differential pressure admits air has been improved, make the atmospheric pressure in the upper tank adjust easier, the mechanical properties of differential pressure casting equipment has been guaranteed, simultaneously because two tunnel are admitted air, thereby solved under the negative pressure condition differential pressure casting equipment can only carry out exhaust work through core vent and reticulation and lead to the not enough process problems of exhaust effect.

Drawings

FIG. 1 is a schematic view showing the construction of a double-inlet type differential pressure casting apparatus;

FIG. 2 is a schematic view of the structure of a first trachea;

FIG. 3 is a schematic view of the pressure in the upper and lower vessels over time during a differential pressure casting process;

in the figure: 1. the device comprises an upper tank 11, a casting mold 12, a first air pipe 121, a first pipeline 122, a second pipeline 123, a negative pressure relay 124, a positive pressure relay 2, a lower tank 21, an aluminum water tank 22, an aluminum water pipeline 23 and a heating device.

Detailed Description

In order to deepen the understanding of the present invention, the present invention is described in detail with reference to the following embodiments and the attached drawings, and the embodiments are only used for explaining the present invention, and do not constitute the limitation to the protection scope of the present invention.

As shown in fig. 1 and 2, a two-way air inlet type differential pressure casting apparatus comprises an upper tank 1 and a lower tank 2, a casting mold 11 is arranged in the upper tank 1, an aluminum water tank 21 is arranged in the lower tank 2, the aluminum water tank 21 is connected with the casting mold 11 through an aluminum water pipeline 22, a heating device 23 is arranged below the aluminum water tank 21 for maintaining the temperature of aluminum water, meanwhile, for the convenience of timely replenishing the aluminum water in the aluminum water tank 21 by an operator, a residue detector (not shown in the figure) is arranged in the aluminum water tank 21, the upper tank 1 is connected with a first air pipe 12, the lower tank 2 is connected with a second air pipe (not shown in the figure), the first air pipe 12 is simultaneously connected with a first pipeline 121 and a second pipeline 122, a negative pressure relay 123 and a positive pressure relay 124 are respectively arranged on the first pipeline 121 and the second pipeline 122, both the negative pressure relay 123 and the positive pressure relay 124 are time relays, the first and

second pipes

121 and 122 are provided with pressure sensors (not shown) which can display positive and negative pressure values.

The working condition is as follows: as shown in fig. 3, the entire differential pressure casting process can be divided into the following sections:

(1) time period 0 to T1: the second air pipe starts to inflate the lower tank 2, at the moment, the air pressure in the lower tank 2 rises to reach P1, and the air starts to extrude the molten aluminum to move into the upper tank 1 along the molten aluminum pipeline 22;

(2) in the time period from T1 to T2: the second air pipe is continuously inflated into the lower tank 2, the air pressure in the lower tank reaches P2, the negative pressure relay 123 on the first pipeline 121 is electrified, the first pipeline 121 is conducted, the air in the upper tank 1 is discharged along the first pipeline 121, the pressure in the upper tank 1 reaches P4(P4 is a negative value), and the technical problem that the exhaust effect is insufficient due to the fact that differential pressure casting equipment can only perform exhaust work through an exhaust plug and a reticulate pattern under the negative pressure condition is solved;

(3) in the time period from T2 to T3: the aluminum water starts to enter the upper tank 1, air in the differential pressure casting equipment is completely discharged, at the moment, the negative pressure relay 123 loses power, the positive pressure relay 124 is powered on, the first pipeline 121 is disconnected, the second pipeline 122 is connected, pressurized gas enters the upper tank 1 along the second pipeline 122, pressurization in the upper tank 1 is completed, and the air pressure in the upper tank 1 and the air pressure in the lower tank 2 both reach P3;

(4) in the time period from T3 to T6: after the aluminum water in the upper tank 1 is filled, the pressure in the lower tank 2 is restored to the initial state, the pressure in the upper tank 1 is kept unchanged, and pressure maintaining and cooling are carried out;

(5) time after T6: after the pressure maintaining cooling process is completed, the positive pressure relay 124 loses power, the second pipeline 122 is disconnected, and the pressure in the upper tank 1 begins to be relieved.

The differential pressure casting equipment changes one path of commonly used air inlet into two paths of air inlet, improves the efficiency of differential pressure air inlet in the whole differential pressure casting process, ensures that the air pressure in an upper tank is adjusted more easily, ensures the mechanical performance of the differential pressure casting equipment, and solves the technical problem that the exhaust effect is insufficient because the differential pressure casting equipment can only exhaust through the exhaust plug and the reticulate pattern under the negative pressure condition due to the adoption of the two paths of air inlet

The above description is only a preferred embodiment of the present invention, and should not be taken as limiting the invention, and any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. The utility model provides a differential pressure casting equipment of double-circuit type of admitting air, includes jar and lower jar, is equipped with the casting mould in the jar, is equipped with the aluminium water pitcher in the lower jar, aluminium water pitcher and casting mould between link to each other through the aluminium water pipeline, its characterized in that, last jar link to each other with first trachea, lower jar links to each other with the second trachea, first trachea link to each other with first pipeline and second pipeline simultaneously, first pipeline and second pipeline on be equipped with negative pressure relay and malleation relay respectively.

2. The differential pressure casting apparatus of the two-way inlet type according to claim 1, wherein a heating device is provided below the molten aluminum tank.

3. The differential pressure casting apparatus of the two-way intake type according to claim 1, wherein a residual amount detector is provided in the aluminum water tank.

4. The differential pressure casting apparatus of the two-way inlet type according to claim 1, wherein the first and second conduits are each provided with a pressure sensor, and the pressure sensors are capable of displaying a positive pressure value and a negative pressure value.

5. The differential pressure casting apparatus of the two-way intake type according to claim 1, wherein the negative pressure relay is a time relay.

6. The differential pressure casting apparatus of the two-pass inlet type according to claim 1, wherein the positive pressure relay is a time relay.