CN217370324U

CN217370324U - Casting sand mould

Info

Publication number: CN217370324U
Application number: CN202220000232.7U
Authority: CN
Inventors: 何长义; 于苏杭; 王世琴; 陈鹏; 戚梦林
Original assignee: Kocel Machinery Co Ltd
Current assignee: Kocel Machinery Co Ltd
Priority date: 2022-01-04
Filing date: 2022-01-04
Publication date: 2022-09-06
Anticipated expiration: 2032-01-04

Abstract

The utility model relates to a casting sand mold, which comprises an upper sand mold and a lower sand mold, wherein the lower sand mold comprises a net-shaped tool and a sand separation layer, the net-shaped tool is provided with a groove, and the bottom of the groove is provided with meshes; the sand separation layer is arranged in the groove, and one side of the sand separation layer, which is deviated from the net-shaped tool, and the upper sand mold form a cavity of the casting. The utility model discloses a casting sand mould, through reasonable structural design, netted frock simple structure, easily setting can play the effect of separating the sand chilling, can also avoid separating inconvenient, the inefficiency of putting of sand chill etc. improvement production efficiency. The embodiment of the utility model discloses casting sand mould, the lower sand mould fungible drag flask that netted frock and sand separating layer constitute, with the cope flask cooperation, the mould assembling is simple, has effectively reduced the sand-iron ratio. The net-shaped tool can be recycled, and the production cost is reduced.

Description

Casting sand mould

Technical Field

The utility model relates to a casting technical field especially relates to a casting sand mould.

Background

The thick and large castings with the structures such as the machine tool workbench, the sliding table, the tray and the like are regular in shape and large in wall thickness, and in order to ensure the quality of the castings, the cooling speed of the thick wall of the castings is generally required to be increased by using a chilling block, and the solidification sequence of the castings is controlled. The direct chill chilling causes obvious color difference on the surface of a casting, causes the problem of uneven material quality, and causes overhigh local hardness, thereby influencing the service performance and the processing performance of the casting. The sand-insulated chill is produced in a pre-buried mode, so that the operation is complex and inconvenient, the efficiency is low, and the cost is higher.

SUMMERY OF THE UTILITY MODEL

On the basis, the casting sand mold with the sand isolating chilling effect and simple shape is needed to be provided aiming at the technical problems that the material is uneven when the direct-cooling chill is placed, the manufacturing of the pre-embedded sand isolating chill is complex, the efficiency is low and the like.

In order to solve the above problem, the utility model adopts the following technical scheme:

the embodiment of the utility model discloses a casting sand mold, which comprises an upper sand mold and a lower sand mold, wherein the lower sand mold comprises a net-shaped tool and a sand separation layer, the net-shaped tool is provided with a groove, and the bottom of the groove is provided with meshes; the sand separation layer is arranged in the groove, and one side of the sand separation layer, which is deviated from the net-shaped tool, and the upper sand mold form a cavity of the casting.

In one embodiment, the grooves are provided with slopes along the circumference, and the projected areas of the grooves in the direction departing from the parting surfaces of the upper sand mold and the lower sand mold are gradually increased.

In one embodiment, the grooves are circumferentially arranged at a slope of 30 ° to 60 °.

In one embodiment, the groove bottom matches the casting shape.

In one embodiment, the net-shaped tool is provided with sand filling holes.

In one embodiment, two sides of the net-shaped tool are provided with box lugs or box opening plates matched with the cope box.

In one embodiment, the sand-separating layer is made of the same material as the upper sand mold.

In one embodiment, the material of the net-shaped tool is cast iron or steel.

The utility model discloses a technical scheme can reach following beneficial effect:

the embodiment of the utility model discloses casting sand mould, through reasonable structural design, netted frock molding is simple, easily set up, can play the effect of separating the sand chilling, can also avoid separating inconvenient, the inefficiency of putting of sand chill etc. improves production efficiency. The embodiment of the utility model discloses casting sand mould, the lower sand mould fungible drag flask that netted frock and sand separating layer constitute, with the cope flask cooperation, the mould assembling is simple, has effectively reduced the sand-iron ratio. The net-shaped tool can be recycled, and the production cost is reduced.

Drawings

Fig. 1 is a schematic structural diagram of a casting sand mold disclosed by the utility model;

FIG. 2 is a schematic view of a net-shaped tooling structure;

fig. 3 is a cross-sectional view of fig. 2.

Description of the reference numerals:

1-sand feeding, 2-net-shaped tooling, 3-sand separation layer and 4-inclination.

Detailed Description

In order to facilitate understanding of the present invention, the present invention will be described more fully hereinafter with reference to the accompanying drawings. The preferred embodiments of the present invention are shown in the drawings. The invention may, however, be embodied in many different forms and should not be construed as limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete.

In the description of the present invention, it should be noted that the terms "upper", "lower", "inner", "outer", "front end", "rear end", "both ends", "one end", "the other end", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of description and simplification of description, but do not indicate or imply that the device or element to be referred must have a specific orientation, be constructed in a specific orientation, and be operated, and thus, should not be construed as limiting the present invention. Furthermore, the terms "first" and "second" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.

In the description of the present invention, it should be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "provided," "connected," and the like are to be construed broadly, such as "connected," which may be fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; the two elements may be directly connected or indirectly connected through an intermediate medium, or may be connected internally or indirectly. The specific meaning of the above terms in the present invention can be understood as a specific case by those skilled in the art.

The present invention will be described in further detail with reference to the accompanying drawings.

As shown in fig. 1 to 3, the embodiment of the utility model discloses a casting sand mould, the disclosed casting sand mould includes sand mould 1 and lower sand mould, goes up sand mould 1 after the mould assembling and forms the cavity that holds the foundry goods with lower sand mould. Specifically, lower sand mould includes netted frock 2 and sand separating layer 3, is provided with the recess on netted frock 2. The bottom of the groove of the net-shaped tool 2 is provided with a plurality of meshes, so that the weight of the net-shaped tool 2 is reduced, and the heat dissipation of the casting is facilitated, so that the structure and the mechanical property of the casting are improved. The sand separation layer 3 is arranged in the groove, and one side of the sand separation layer 3, which deviates from the net-shaped tool, and the upper sand mold 1 form a cavity of a casting.

Compared with the prior art, the embodiment of the utility model discloses a casting sand mould has reduced sand mould thickness down, and intensity and rigidity of sand mould can be guaranteed down to netted frock 2. Of course, the sand-separating layer 3 may be formed by reversely buckling the net-shaped tool 2 on a mold and manually filling sand through meshes, or may be formed by a 3D printing method and assembled with the net-shaped tool 2.

In the prior art, no matter a direct cooling method for chilling a casting by directly arranging a chiller or an indirect cooling method for arranging a sand-isolating chiller by isolating sand, the chiller is buried in a sand mold, the sand mold can be subjected to extrusion force caused by thermal expansion of the chiller in the pouring process, the sand mold is scattered due to overlarge extrusion force, and broken sand can be extruded into liquid metal, so that the sand inclusion defect is caused. Compared with the prior art, the embodiment of the utility model discloses a casting sand mould, the effect of separating the sand chill is played in 2 one sides of netted frock and 3 contacts on the sand separation layer, and the opposite side directly exposes in the air, and the pouring in-process netted frock 2 is heated to the one side inflation and the heat dissipation of exposing in the air, reduces because netted frock 2 is heated the inflation and to the extrusion force that separates sand layer 3. And, the mesh setting of netted frock 2 further reduces the extrusion force that netted frock 2 is heated the inflation and to sand control layer 3, prevents that sand control layer 3 from collapsing and getting into the foundry goods in, has improved the qualification rate of foundry goods.

In an alternative embodiment, the grooves of the net-shaped tool 2 are provided with slopes 4 along the circumference, and the projection areas of the grooves in the directions departing from the parting surfaces of the upper sand mold 1 and the lower sand mold are gradually increased; the inclination 4 plays a role in fixing the sand separation layer 3, and casting defects such as sand inclusion of castings and the like caused by the fact that the sand separation layer is dispersed and layered due to overhigh pouring temperature in the smelting and pouring process of the sand separation layer 3 are avoided.

Further, the inclination 4 of the groove of the net-shaped tool along the circumference is 30-60 degrees, preferably 45 degrees.

In an alternative embodiment, the net-shaped tooling 2 is provided with box lugs or box opening plates matched with the cope boxes on both sides. The net-shaped tool 2 is also provided with sand filling holes which are larger than the meshes and easier to fill sand for modeling. In the molding process, filling sand, compacting and strickling the casting sand through the sand filling holes and/or meshes of the net-shaped tool 2, and matching with a mold to manufacture a lower sand mold with a sand separation layer 3 and the net-shaped tool 2; a cope flask having a cope mold 1 is manufactured using foundry sand and a mold. Because box ears or box opening plates are arranged on two sides of the reticular tooling 2, the lower sand mould can replace a lower sand box and an upper sand box to carry out mould assembling. After stripping, the cope flask and the box lug or the box mouth plate of the lower sand mold are clamped tightly for mold assembling, so that the phenomenon of gunfire during pouring is avoided. In the pouring process, after molten iron enters the cavity through the pouring system, the casting starts to be solidified and formed, the molten iron is converted into a solid state from a liquid state, the casting is cooled gradually, the net-shaped tool 2 plays a role in isolating sand and cooling iron in the process, the solidification sequence and the cooling speed of the casting are controlled, and the quality of the casting is optimized.

Furthermore, box ears on the net-shaped tool 2 and box ears of the cope box are fastened through bolts and nuts matched with the bolts, and certainly, a C-shaped clamp can be used for fastening, so that the assembly and disassembly are more convenient. For the production of small castings, the box lug is replaced by the box opening plate, the box opening plate on the net-shaped tool 2 and the box opening plate of the cope box are fastened through the C-shaped fixture, and the operation is convenient and the assembly and disassembly are easy.

In an optional embodiment, the casting is irregular in structure, and the bottom of the groove in the net-shaped tool 2 is matched with the shape of the casting; the thickness of each part of the sand separation layer 3 is consistent, and the thickness is about 20 mm. After modeling, mould assembling and pouring, the net-shaped tool 2 controls the cooling speed of the casting by carrying out sand isolation and chilling on the casting through all the shape following surfaces. And the lower sand mould replaces the lower sand box, effectively reduces sand-iron ratio of the sand box, and improves production efficiency.

In the casting sand mold disclosed in any of the above embodiments, the material of the sand separating layer 3 is the same as that of the upper sand mold 1, and the sand is formed by curing a resin and a curing agent in a two-component manner.

Furthermore, the material of the net-shaped tool 2 is cast iron or steel, and according to the structure of the casting, the thickness of the net-shaped tool 2 at the thick and large part and/or the key part can be increased, and the solidification sequence and the cooling speed of each part of the casting are controlled. The net-shaped tool 2 can be recycled, so that the production efficiency is improved, and the production cost is reduced.

The above-mentioned embodiments only represent some embodiments of the present invention, and the description thereof is specific and detailed, but not to be construed as limiting the scope of the present invention. It should be noted that, for those skilled in the art, without departing from the concept of the present invention, several variations and modifications can be made, which all fall within the scope of the present invention. Therefore, the protection scope of the present invention should be subject to the appended claims.

Claims

1. A casting sand mold is characterized by comprising an upper sand mold and a lower sand mold, wherein the lower sand mold comprises a net-shaped tool and a sand separation layer, a groove is formed in the net-shaped tool, and meshes are formed in the bottom of the groove; the sand separation layer is arranged in the groove, and one side of the sand separation layer, which is deviated from the net-shaped tool, and the upper sand mold form a cavity of the casting.

2. A casting sand mold according to claim 1, wherein the recesses are provided with a slope along the periphery, and the projected area of the recesses in a direction away from the parting surfaces of the upper sand mold and the lower sand mold gradually increases.

3. A casting sand mold according to claim 2, wherein said grooves are circumferentially arranged at a slope of 30 ° to 60 °.

4. A casting sand mold according to claim 1, wherein the groove bottom matches the shape of the casting.

5. A casting sand mold according to claim 1, wherein the net-shaped tooling is provided with sand filling holes.

6. A casting sand mold according to claim 1, wherein both sides of the net-like tooling are provided with box lugs or box jaw plates matching with the cope flask.

7. A casting sand mold according to claim 1, wherein the sand-barrier layer is the same material as the upper sand mold.

8. A casting sand mold according to any one of claims 1 to 7, wherein the material of the net-shaped tooling is cast iron or steel.