Vacuum pouring device for precisely casting mold shell

Abstract

The utility model relates to the technical field of mold shell pouring equipment, in particular to a precision casting mold shell vacuum pouring device which comprises a pouring seat, a bottom plate is arranged at the bottom of the pouring seat, a vibration mechanism is arranged between the bottom plate and the pouring seat, and a fixing column, a sealing groove and a mold groove are arranged at the top of the pouring seat. A top plate is fixedly mounted at the top end of each fixing column, a movable plate is arranged on the outer side of each fixing column in an attached and sleeving mode, an upper mold plate and an annular protruding block are fixedly mounted at the bottom of each movable plate, a pressure suction pipe is arranged at the top of each movable plate in a sealed and penetrating mode, and a sealing pressure spring is fixedly mounted on the inner wall of the bottom end of each sealing groove; according to the vacuum pouring device for the precision casting mold shell, by means of the structural design in the vibration mechanism, flowing and distribution of a mixture in the pouring process are facilitated, formation of air holes and shrinkage cavities in the mold shell is reduced, and the density and the surface quality of a casting are improved.

Description

Technical Field

[0001] The utility model relates to the technical field of mold shell casting equipment, in particular to a precision casting mold shell vacuum casting device. Background Art

[0002] Investment casting is a process for producing metal alloy castings. It mainly produces various alloy castings with relatively high dimensional accuracy and relatively complex shapes. These castings are widely used in aerospace, military industry, electronics, petroleum, chemical industry, energy, transportation, light industry, textile, pharmaceuticals, medical equipment and other equipment.

[0003] A currently used precision casting mold vacuum pouring device mostly does not have vibration during pouring, which easily causes air holes and shrinkage holes to form on the surface of the mold, thereby reducing the density and surface quality of the casting, which is not conducive to improving the dimensional accuracy of the casting. At the same time, the sealing effect shown in the device is poor, resulting in the inability to guarantee the vacuum state during the pouring process, which is not conducive to subsequent pouring.

[0004] In summary, the present invention solves the problems in the above-mentioned background technology by designing a precision casting mold shell vacuum pouring device. Utility Model Content

[0005] The purpose of the utility model is to provide a vacuum pouring device for a precision casting mold shell to solve the problems raised in the above background technology.

[0006] To achieve the above objectives, the present invention provides the following technical solutions:

[0007] A precision casting mold shell vacuum pouring device, comprising a pouring seat, a bottom plate provided at the bottom of the pouring seat, a vibration mechanism provided between the bottom plate and the pouring seat, a fixed column, a sealing groove and a mold groove provided on the top of the pouring seat, the top of each of the fixed columns is fixedly mounted with a top plate, the top of the top plate is provided with a pouring pipe and a hydraulic rod, a movable plate is fitted on the outer side of the fixed column, an upper template and an annular protrusion are fixedly mounted on the bottom of the movable plate, a suction and pressure pipe is provided through the top seal of the movable plate, a sealing compression spring is fixedly mounted on the inner wall of the bottom end of the sealing groove, and a sealing block is provided on the top of the sealing compression spring;

[0008] The vibration mechanism includes an electromagnetic vibrator and a supporting air cylinder. The electromagnetic vibrator is fixedly installed on the bottom surface of the casting seat. The supporting air cylinders are fixedly installed on the bottom sides of the base plate. A sealing pressure plate is provided inside the supporting air cylinder. A piston column supporting a compression spring is provided on the top of the supporting air cylinder. An inflation valve port is provided on the outside of the supporting air cylinder.

[0009] As a preferred solution of the present invention, the cross-sectional shape of the sealing groove matches the annular protrusion, and its inner wall is in sealing contact with the outer surface of the sealing block, and the sealing compression spring is distributed annularly and equidistantly about the bottom inner wall of the sealing groove.

[0010] As a preferred solution of the present invention, the bottom end of the pouring tube passes through the top surface of the top plate, the top surface of the movable plate in sequence and extends to the inner top of the upper template, and the outer surface of the pouring tube is slidably connected to the inner wall of the top plate.

[0011] As a preferred solution of the present invention, one end of the suction and pressure tube passes through the top surface of the movable plate and extends to the inner top of the upper template, and the other end thereof is connected to a vacuum pump.

[0012] As a preferred solution of the present invention, the telescopic end of the hydraulic rod passes through the top surface of the top plate and is fixed to the top surface of the movable plate.

[0013] As a preferred solution of the present invention, the support gas cylinder is distributed symmetrically with respect to the top surface of the base plate, the bottom end of the piston column passes through the top surface of the support gas cylinder and is fixedly connected to the top surface of the sealing pressure plate, and its top end is fixedly connected to the bottom surface of the casting seat.

[0014] As a preferred solution of the present invention, the support compression spring is sleeved on the outer surface of the piston column, the top end of the support compression spring contacts the bottom surface of the casting seat, and the bottom end contacts the top surface of the support gas cylinder.

[0015] Compared with the prior art, the beneficial effects of the present invention are:

[0016] 1. In the utility model, a precision casting mold shell vacuum pouring device is set up, thereby utilizing the structural design in the vibration mechanism. Under the use of an electromagnetic vibrator, the pouring seat can be accurately vibrated. With the combination of the sealing pressure plate and the supporting compression spring inside the support air cylinder, the stability of the pouring seat during the vibration process can be ensured. At the same time, the air pressure is adjusted by the inflation valve port to achieve control of the vibration intensity, which helps the flow and distribution of the mixture during the pouring process, reduces the formation of pores and shrinkage holes in the mold shell, and improves the density and surface quality of the casting.

[0017] 2. In the utility model, a precision casting mold shell vacuum pouring device is set up, thereby utilizing the structural design of the sealing groove, sealing block, sealing compression spring and annular protrusion. Under the annular equidistant distribution of the sealing compression spring, a sealing contact is formed between the sealing block and the annular protrusion, thereby achieving a sealing effect between the mold groove and the upper template, ensuring the vacuum state during the pouring process, and facilitating subsequent pouring. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a schematic diagram of the overall structure of the utility model;

[0019] Figure 2 This is a schematic diagram of the partial exploded structure of the device of the utility model;

[0020] Figure 3 This is a schematic diagram of the structure of the vibration mechanism of the utility model;

[0021] Figure 4 This is a structural diagram of the utility model when the sealing pressure plate and the supporting air cylinder are separated.

[0022] In the figure: 1. Casting seat; 2. Bottom plate; 3. Vibration mechanism; 301. Electromagnetic vibrator; 302. Support air cylinder; 303. Sealing pressure plate; 304. Support compression spring; 305. Piston column; 306. Inflating valve port; 4. Fixed column; 5. Sealing groove; 501. Sealing compression spring; 502. Sealing block; 6. Mold groove; 7. Top plate; 701. Casting pipe; 702. Hydraulic rod; 8. Moving plate; 801. Upper template; 802. Annular protrusion; 803. Suction and pressure pipe. DETAILED DESCRIPTION

[0023] The following will combine the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the present invention.

[0024] To facilitate understanding of the present invention, the present invention will be described more comprehensively below with reference to the relevant drawings, and several embodiments of the present invention are given. However, the present invention can be implemented in many different forms and is not limited to the embodiments described herein. On the contrary, the purpose of providing these embodiments is to make the disclosure of the present invention more thorough and comprehensive.

[0025] It should be noted that when an element is referred to as being "fixed on" another element, it may be directly on the other element or there may be a central element. When an element is considered to be "connected to" another element, it may be directly connected to the other element or there may be a central element at the same time. The terms "vertical", "horizontal", "left", "right" and similar expressions used in this article are for illustrative purposes only.

[0026] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by those skilled in the art to which this invention pertains. The terms used herein in the specification of this invention are for the purpose of describing specific embodiments only and are not intended to limit this invention. The term "and / or" used herein includes any and all combinations of one or more of the related listed items.

[0027] For examples, see Figure 1-4 , the utility model provides a technical solution:

[0028] A precision casting mold shell vacuum pouring device includes a pouring base 1, a bottom plate 2 is provided at the bottom of the pouring base 1, a vibration mechanism 3 is provided between the bottom plate 2 and the pouring base 1, a fixed column 4, a sealing groove 5 and a mold groove 6 are respectively provided on the top of the pouring base 1, a top plate 7 is fixedly installed on the top of the fixed column 4, a pouring pipe 701 and a hydraulic rod 702 are provided on the top of the top plate 7, a movable plate 8 is fitted on the outer side of the fixed column 4, an upper mold plate 801 and an annular protrusion 802 are respectively fixedly installed on the bottom of the movable plate 8, a suction and pressure pipe 803 is provided through the top of the movable plate 8, a sealing compression spring 501 is fixedly installed on the inner wall of the bottom end of the sealing groove 5, and a sealing block 502 is provided on the top of the sealing compression spring 501;

[0029] Specifically, the cross-sectional shape of the sealing groove 5 matches the annular protrusion 802, and its inner wall is in sealing contact with the outer surface of the sealing block 502. The sealing compression springs 501 are equidistantly distributed in a ring shape about the inner wall of the bottom end of the sealing groove 5. The telescopic end of the hydraulic rod 702 passes through the top surface of the top plate 7 and is fixed to the top surface of the movable plate 8. One end of the suction and pressure tube 803 passes through the top surface of the movable plate 8 and extends to the inner top of the upper template 801, and the other end thereof is connected to a vacuum pump.

[0030] In this embodiment, the hydraulic rod 702 is set to drive the upper template 801 and the annular protrusion 802, so as to achieve the contact between the upper template 801 and the mold groove 6, and the proximity of the annular protrusion 802 to the sealing groove 5. The sealing compression spring 501 is set to support the sealing block 502, so that the sealing block 502 forms a sealed contact with the annular protrusion 802 in the sealing groove 5. At the same time, under the action of the vacuum pump and the suction and pressure tube 803, the inside of the mold groove 6 can be vacuumed to ensure the vacuum state of the device during the casting process.

[0031] It should be noted that the bottom end of the pouring tube 701 sequentially passes through the top surface of the top plate 7 and the top surface of the movable plate 8 and extends to the inner top end of the upper template 801. The outer surface of the pouring tube 701 is slidably connected to the inner wall of the top plate 7.

[0032] In this embodiment, please refer to Figure 1 、 Figure 3 and Figure 4 The vibration mechanism 3 includes an electromagnetic vibrator 301 and a support cylinder 302. The electromagnetic vibrator 301 is fixedly mounted on the bottom surface of the casting seat 1. The support cylinders 302 are fixedly mounted on the bottom sides of the base plate 2. A sealing pressure plate 303 is provided inside the support cylinder 302. A piston column 305 supporting a compression spring 304 is provided on the top of the support cylinder 302. An air filling valve port 306 is provided on the outside of the support cylinder 302.

[0033] Specifically, the support cylinder 302 is symmetrically distributed about the top surface of the base plate 2. The bottom end of the piston column 305 passes through the top surface of the support cylinder 302 and is fixedly connected to the top surface of the sealing pressure plate 303, and its top end is fixedly connected to the bottom surface of the casting seat 1. The support compression spring 304 is sleeved on the outer surface of the piston column 305. The top end of the support compression spring 304 contacts the bottom surface of the casting seat 1, and its bottom end contacts the top surface of the support cylinder 302.

[0034] In this embodiment, the electromagnetic vibrator 301 is mainly used to precisely vibrate the casting seat 1, and at the same time, the air pressure is adjusted through the inflation valve port 306 to achieve control of the vibration intensity. With the combination of the supporting compression spring 304, the piston column 305 and the sealing pressure plate 303, the casting seat 1 can be supported to ensure the stability of the device during vibration and meet the casting requirements of the mold shell.

[0035] The working process of the present utility model is as follows: when using a vacuum pouring device for a precision casting mold shell, first, under the drive of the hydraulic rod 702, the movable plate 8 gradually moves downward along the outer surface of the fixed column 4, causing the upper template 801 to contact the mold groove 6. At this time, the annular protrusion 802 enters the sealing groove 5 and applies downward pressure to the sealing block 502. Subsequently, the sealing compression spring 501 gradually compresses and generates an upward elastic force. This force can ensure that a sealed contact state is formed between the sealing block 502 and the annular protrusion 802, thereby improving the sealing effect between the mold groove 6 and the upper template 801. Then, the vacuum pump is connected to the suction and pressure pipe 803 and a vacuum operation is performed. , thereby ensuring the vacuum state between the mold groove 6 and the upper template 801, and finally pouring through the pouring tube 701. During the pouring process, the electromagnetic vibrator 301 is started, and then the pouring seat 1 vibrates. At this time, the pouring seat 1 drives the piston column 305 to move down and squeeze the supporting compression spring 304. Then the piston column 305 drives the sealing pressure plate 303 to move down along the inner wall of the supporting gas cylinder 302 and compress the gas inside it. As the gas is compressed, it can absorb part of the vibration force, thereby achieving effective control of the vibration intensity, which is conducive to the flow and distribution of the mixture during the pouring process and improves the pouring quality of the mold shell.

[0036] Although the embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and variations may be made to these embodiments without departing from the principles and spirit of the present invention, and the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A vacuum pouring device for a precision casting mold shell, comprising a pouring seat (1), characterized in that: The bottom of the pouring seat (1) is provided with a bottom plate (2), a vibration mechanism (3) is provided between the bottom plate (2) and the pouring seat (1), the top of the pouring seat (1) is provided with a fixed column (4), a sealing groove (5) and a mold groove (6), the top of the fixed column (4) is fixedly installed with a top plate (7), the top of the top plate (7) is provided with a pouring pipe (701) and a hydraulic rod (702), the outer side of the fixed column (4) is fitted with a movable plate (8), the bottom of the movable plate (8) is fixedly installed with an upper mold plate (801) and an annular protrusion (802), the top seal of the movable plate (8) is provided with a suction and pressure pipe (803), the bottom inner wall of the sealing groove (5) is fixedly installed with a sealing compression spring (501), and the top of the sealing compression spring (501) is provided with a sealing block (502); The vibration mechanism (3) includes an electromagnetic vibrator (301) and a support gas cylinder (302), wherein the electromagnetic vibrator (301) is fixedly mounted on the bottom surface of the casting seat (1), and the support gas cylinder (302) is fixedly mounted on the bottom side of the base plate (2). A sealing pressure plate (303) is provided inside the support gas cylinder (302), and a piston column (305) supporting a compression spring (304) is provided on the top of the support gas cylinder (302), and an inflation valve port (306) is provided on the outside of the support gas cylinder (302).

2. A vacuum pouring device for precision casting mold shell according to claim 1, characterized in that: The cross-sectional shape of the sealing groove (5) matches the annular protrusion (802), and its inner wall is in sealing contact with the outer surface of the sealing block (502), and the sealing compression springs (501) are distributed in an annular manner with equal distances about the bottom inner wall of the sealing groove (5).

3. A vacuum pouring device for precision casting mold shell according to claim 1, characterized in that: The bottom end of the pouring pipe (701) passes through the top surface of the top plate (7) and the top surface of the movable plate (8) in sequence and extends to the inner top end of the upper template (801), and the outer surface of the pouring pipe (701) is slidably connected to the inner wall of the top plate (7).

4. A vacuum pouring device for precision casting mold shell according to claim 1, characterized in that: One end of the suction and pressure tube (803) passes through the top surface of the movable plate (8) and extends to the inner top of the upper template (801), and the other end thereof is connected to a vacuum pump.

5. The vacuum pouring device for precision casting mold shell according to claim 1, characterized in that: The telescopic end of the hydraulic rod (702) passes through the top surface of the top plate (7) and is fixed to the top surface of the movable plate (8).

6. A vacuum pouring device for precision casting mold shell according to claim 1, characterized in that: The support cylinder (302) is symmetrically distributed with respect to the top surface of the base plate (2). The bottom end of the piston column (305) passes through the top surface of the support cylinder (302) and is fixedly connected to the top surface of the sealing pressure plate (303), and its top end is fixedly connected to the bottom surface of the casting seat (1).

7. The vacuum pouring device for precision casting mold shell according to claim 1, characterized in that: The support compression spring (304) is sleeved on the outer surface of the piston column (305), the top end of the support compression spring (304) contacts the bottom surface of the casting seat (1), and the bottom end thereof contacts the top surface of the support cylinder (302).

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