CN216359307U

CN216359307U - Spherical filtering structure for differential pressure casting

Info

Publication number: CN216359307U
Application number: CN202122902828.4U
Authority: CN
Inventors: 李登尧; 李楠; 訾凌君; 刘一苇; 蔡伟; 郭海军; 罗凤宝; 周瑞晓
Original assignee: CITIC Dicastal Co Ltd
Current assignee: CITIC Dicastal Co Ltd
Priority date: 2021-11-25
Filing date: 2021-11-25
Publication date: 2022-04-22
Anticipated expiration: 2031-11-25

Abstract

The utility model provides a spherical filtration for counter-pressure casting, is including setting up the spherical filter screen on the runner cover, and spherical filter screen includes two hemispherical last filter screens and lower filter screen, goes up the filter screen and all includes hemisphere filter house and outside crimping portion with lower filter screen, and two hemisphere filter houses are connected crimping portion through subtend hot extrusion mode. After the upper die and the lower die are assembled, the side surface of the sprue bush is restrained against the side surface of the lower hemisphere, so that the impact force of aluminum liquid on the filter screen in the filling process is consumed, the requirement on the pressing force of the shunting cones is reduced, the sprue bush type aluminum filter is suitable for the shapes and the positions of different shunting cones, the failure behaviors of the filter screen such as overturning, overturning and the like under the impact action of the aluminum liquid are prevented, and the quality risk is reduced.

Description

Spherical filtering structure for differential pressure casting

Technical Field

The application relates to the technical field of casting molds, in particular to a spherical filtering structure for differential pressure casting.

Background

The differential pressure casting belongs to bottom pouring type casting, a filter screen is placed at the upper end face of a lower die pouring gate sleeve in the production process, molten aluminum flows through the filter screen before filling, the effects of stabilizing flow, filtering residues and the like are achieved, the filter screen plays an extremely important role in the differential pressure casting process, and the differential pressure casting method is an effective means for controlling casting air holes and slag inclusion.

Traditional differential pressure casting fiber filter screen is conical structure, and the top is the cavity molding, through the cooperation of reposition of redundant personnel awl head and toper filter screen up end after the compound die, compresses tightly the compaction with the filter screen, leans on the net hole realization of conical surface to filter aluminium liquid, plays the filter effect. However, due to the limitation of casting modeling, only the long and thin structure of the diversion cone or the diversion cone with the eccentric structure can be arranged on part of the casting. The slender shunting cone cannot cover the hollow part at the top of the filter screen in the traditional structure and cannot tightly press the filter screen; the eccentric structure of the diffluence cone is difficult to align with the diffluence cone due to the non-center hollow position at the top of the filter screen, so as to ensure the filter screen to be compressed, and the filter screen is easy to have failure behaviors such as deviation, overturn or overturn and the like due to the flowing impact of aluminum liquid in the filling process.

SUMMERY OF THE UTILITY MODEL

The embodiment of the application provides a spherical filtering structure in differential pressure casting, which can solve the technical problem in the background.

In order to achieve the purpose, the utility model provides the following technical scheme:

the utility model provides a spherical filtration for counter-pressure casting, is including setting up the spherical filter screen on the runner cover, and spherical filter screen includes two hemispherical last filter screens and lower filter screen, goes up the filter screen and all includes hemisphere filter house and outside crimping portion with lower filter screen, and two hemisphere filter houses are connected crimping portion through subtend hot extrusion mode.

In some embodiments, the upper filter screen and the lower filter screen are integrally hot-pressed and formed by high-temperature-resistant glass fiber woven meshes.

In some embodiments, the upper end of the upper filter screen is in a spherical mesh structure, and the lower end of the upper filter screen is provided with a turned edge which is turned outwards; the lower end of the lower filter screen is of a spherical mesh structure, and the upper end of the lower filter screen is provided with a turned edge which is turned outwards.

In some embodiments, the bead portion is the same outer diameter as the sprue bushing; the diameter of the hemispherical filter part is the same as the inner diameter of the sprue bush.

Compared with the prior art, the utility model has the beneficial effects that:

the utility model provides a spherical filtering structure for differential pressure casting, wherein the spherical filtering net is formed by combining two hemispherical filtering nets with curled parts, the bottom hemisphere is embedded into a sprue bush, the curled edge of the middle part is supported by the upper edge of the sprue bush, and the top hemisphere is pressed by the end part of a sprue spreader in an interference fit manner. In the casting process, after an upper die and a lower die of a casting die are assembled, the side face of the bottom hemisphere is restrained by a sprue bush, the impact force of molten aluminum on a filter screen in the mold filling process is consumed, the requirement on the pressing force of the end part of the diversion cone is reduced, the requirements on the shape and the position of the diversion cone corresponding to castings with different structures are met, the filter screen is prevented from failing under the impact action of the molten aluminum, such as overturning, overturning and the like, the defects of casting air holes, slag inclusion and the like are reduced, the casting yield is improved, and the quality risk is reduced.

Drawings

In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings needed to be used in the description of the embodiments are briefly introduced below, and it is obvious that the drawings in the following description are some embodiments of the present application, and it is obvious for those skilled in the art to obtain other drawings based on these drawings without creative efforts.

Fig. 1 is a schematic structural view of a spherical filter screen for differential pressure casting according to the present invention.

Fig. 2 is a schematic diagram of the fitting structure and position of the spherical filtering structure in the casting mold.

Description of the reference numerals

1-sprue spreader, 2-upper die, 3-casting, 4-lower die, 5-spherical filter screen, 51-upper filter screen, 52-lower filter screen and 6-sprue bush.

Detailed Description

The terms "first," "second," "third," and "fourth," etc. in the description and claims of this application and in the accompanying drawings are used for distinguishing between different objects and not for describing a particular order. Furthermore, the terms "include" and "have," as well as any variations thereof, are intended to cover non-exclusive inclusions. For example, a process, method, system, article, or apparatus that comprises a list of steps or elements is not limited to only those steps or elements listed, but may alternatively include other steps or elements not listed, or inherent to such process, method, article, or apparatus.

Reference herein to "an embodiment" means that a particular feature, structure, or characteristic described in connection with the embodiment can be included in at least one embodiment of the application. The appearances of the phrase in various places in the specification are not necessarily all referring to the same embodiment, nor are separate or alternative embodiments mutually exclusive of other embodiments. It is explicitly and implicitly understood by one skilled in the art that the embodiments described herein can be combined with other embodiments.

The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application, and it is obvious that the described embodiments are some, but not all, embodiments of the present application. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present application.

Example (b):

as shown in fig. 1, the present embodiment provides a spherical filter screen for differential pressure casting, which includes an upper filter screen 51 and a lower filter screen 52, both made of high temperature resistant glass fiber, and a hemispherical filter part 51a and a bead part 51b integrally formed. The upper filter screen 51 and the lower filter screen 52 have the same structure and symmetrical directions, and the curled parts 51b are adjacent to each other and combined to form the spherical filter screen 5 in a hot extrusion mode.

As shown in fig. 2, the present embodiment provides an application environment of a spherical filter screen structure in differential pressure casting in a differential pressure casting mold, which includes: comprises a spreader cone 1, an upper die 2, a casting 3, a lower die 4, a spherical filter screen 5 and a sprue bush 6. The hemispherical filter portion 51a of the spherical filter net 5 has the same diameter as the inner diameter of the sprue bush 6, and the lower half portion of the spherical filter net 5 can be fitted into the sprue bush 6. The diameter of the curled part 51b of the spherical filter screen 5 is the same as the outer diameter of the top of the sprue bush 6, and the curled part 51b can be supported by the upper edge of the sprue bush 6. In the casting process, the upper die 2 and the lower die 4 are assembled, the upper half part of the spherical filter screen 5 is in interference fit with the lower end of the sprue spreader 1, and the spherical filter screen 5 is pressed tightly under stress.

In the casting process, after the upper die 2 and the lower die 4 are assembled, the sprue bush 6 is used for restraining the side surface of the hemispherical filtering part 51a at the bottom of the spherical filtering net 5, so that the impact force of the consumed aluminum liquid on the spherical filtering net 5 in the mold filling process is reduced, the requirement on the pressing force of the end part of the shunting cone is reduced, and the requirements on the shape and the position of the shunting cone corresponding to castings with different structures are met.

Compared with the prior art, the utility model has the beneficial effects that:

The foregoing detailed description of the embodiments of the present application has been presented to illustrate the principles and implementations of the present application, and the above description of the embodiments is only provided to help understand the method and the core concept of the present application; meanwhile, for a person skilled in the art, according to the idea of the present application, there may be variations in the specific embodiments and the application scope, and in summary, the content of the present specification should not be construed as a limitation to the present application.

Claims

1. The utility model provides a spherical filtration for counter-pressure casting, its characterized in that, is including setting up spherical filter screen (5) on runner cover (6), spherical filter screen (5) are including two hemispherical last filter screen (51) and lower filter screen (52), go up filter screen (51) with lower filter screen (52) all include hemisphere filter house and outside crimp portion, two hemisphere filter house is through subtend hot extrusion mode with crimp portion connection.

2. The spherical filter structure for differential pressure casting according to claim 1, wherein the upper filter screen (51) and the lower filter screen (52) are integrally formed by hot press molding using a woven mesh of high temperature resistant glass fibers.

3. The spherical filter structure for differential pressure casting according to claim 1, wherein the upper filter screen (51) has an upper end of a spherical mesh structure and a lower end having a bead turned outward; the lower end of the lower filter screen (52) is of a spherical mesh structure, and the upper end of the lower filter screen is provided with a turned edge which is turned over outwards.

4. The spherical filter structure for differential pressure casting according to claim 1, wherein the bead portion is the same as the outer diameter of the sprue bush (6); the diameter of the hemispherical filter part is the same as the inner diameter of the sprue bush (6).