CN217412359U

CN217412359U - Sand mould assembly for casting

Info

Publication number: CN217412359U
Application number: CN202123342035.8U
Authority: CN
Inventors: 吴志强; 王云翔
Original assignee: Guangdong Fuhua Casting Co ltd
Current assignee: Guangdong Fuhua Casting Co ltd
Priority date: 2021-12-27
Filing date: 2021-12-27
Publication date: 2022-09-13
Anticipated expiration: 2031-12-27

Abstract

A sand mould component for casting comprises an upper sand mould, a lower sand mould, a nut and a fixing piece; an upper die surface is formed on the lower surface of the upper sand mold, a lower die surface is formed on the upper surface of the lower sand mold, the upper sand mold is positioned above the lower sand mold, and the upper die surface and the lower die surface jointly enclose a casting cavity; the nut is arranged in the casting cavity, the lower end surface of the nut is attached to the lower die surface, and the upper end surface of the nut faces the upper die surface; the fixing piece is in a long strip shape, the length direction of the fixing piece is consistent with the axial direction of the nut, one part of the fixing piece penetrates through a threaded hole of the nut, the other part of the fixing piece penetrates through the lower die surface and is arranged in the lower sand mold, and filler is arranged in a gap formed by the fixing piece and the nut. The utility model discloses make nut and foundry goods integrated into one piece, utilize the nut directly to form a screw hole on the foundry goods simultaneously, need not to process the screw hole on the foundry goods through the mode of machining, under the prerequisite that satisfies foundry goods assembly requirement, improved cast production efficiency, reduced the processing cost.

Description

Sand mould assembly for casting

Technical Field

The utility model relates to a casting technical field, concretely relates to sand type subassembly for casting.

Background

In order to meet the assembly requirements, some castings are generally required to be provided with threaded holes in a machining mode after casting forming, and tools such as clamping, positioning and the like are additionally required in the machining process, so that the production cost of parts is further increased, and the production period is prolonged; in addition, for some wear-resistant castings made of special materials, higher requirements are put forward on machining, and due to the fact that the hardness of the materials is high, the requirements on machining tools are strict, and machining cost is high.

SUMMERY OF THE UTILITY MODEL

The utility model aims to provide a not enough to prior art, the utility model aims at providing a sand mould subassembly is used in casting for improve the production efficiency of the foundry goods of threaded hole, reduction in production cost simultaneously.

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

a sand mould assembly for casting comprises an upper sand mould, a lower sand mould, a nut and a fixing piece;

an upper die surface is formed on the lower surface of the upper sand mold, a lower die surface is formed on the upper surface of the lower sand mold, the upper sand mold is positioned above the lower sand mold, and the upper die surface and the lower die surface jointly enclose a casting cavity;

the nut is arranged in the casting cavity, the lower end surface of the nut is attached to the lower die surface, and the upper end surface of the nut faces the upper die surface;

the fixing piece is in a long strip shape, the length direction of the fixing piece is consistent with the axial direction of the nut, one part of the fixing piece penetrates through a threaded hole of the nut, the other part of the fixing piece penetrates through the lower die surface and is arranged in the lower sand mold, and filler is arranged in a gap formed by the fixing piece and the nut.

The top end part of the fixing piece is lower than the upper end face of the nut, and the top of the filler covers the top opening of the threaded hole of the nut.

The fixing piece is an iron nail which comprises a nail cap which is positioned at the bottom end of the iron nail and is arranged in the lower sand mold.

The lower die surface is provided with a concave position which is concave downwards, the depth of the concave position is smaller than the height of the nut, the nut is arranged in the concave position, the lower end surface of the nut is attached to the bottom wall of the concave position, and a gap is formed between the side wall of the concave position and the outer side wall of the nut.

Go up the outside parcel of sand mould and have a cope flask, the outside parcel of sand mould has a drag flask, is provided with a plurality of setting elements that are used for fixing its the two between cope flask and the drag flask.

The positioning piece is a positioning pin which transversely penetrates through the cope flask and the drag flask.

An upper connecting plate extending outwards is arranged on the outer periphery of the bottom of the upper sand box, a lower connecting plate extending outwards is arranged on the outer periphery of the top of the lower sand box, the lower connecting plate is attached to the lower surface of the upper connecting plate, and the positioning pin penetrates through the upper connecting plate and the lower connecting plate.

The beneficial effects of the utility model reside in that:

the utility model discloses with the nut pre-buried in the casting die cavity, during the pouring, molten iron and nut periphery fuse, solidify the back at the molten iron, nut direct forming takes out the filler from the screw hole of nut on the foundry goods for nut and foundry goods integrated into one piece utilize the nut directly to form a screw hole on the foundry goods simultaneously, need not to process the screw hole on the foundry goods through the mode of machining, under the prerequisite that satisfies the foundry goods assembly requirement, improved cast production efficiency, reduced the processing cost.

Drawings

Fig. 1 is a schematic structural view of the present invention;

fig. 2 is an enlarged view at a in fig. 1.

Detailed Description

The invention will be further described with reference to the accompanying drawings and specific embodiments:

as shown in fig. 1 and 2, for the casting sand mold assembly of the present invention, it includes an upper sand mold 10, a lower sand mold 20, a nut 50, and nails 60, the lower surface of the upper sand mold 10 forms an upper molding surface 11, the upper surface of the lower sand mold 20 forms a lower molding surface 21, the upper sand mold 10 is located above the lower sand mold 20, and the two are stacked, so that the upper molding surface 11 and the lower molding surface 21 cooperate to form a casting cavity together, the nut 50 is disposed inside the casting cavity, and the lower end surface of the nut 50 is attached to the lower molding surface 21, and the upper end surface faces the upper molding surface 11, the nut 50 is fixedly engaged with the lower sand mold 20 by the nails 60, specifically, the extending direction of the nails 60 is consistent with the axial direction of the nut 50, the upper half part of the nails 60 is threaded into the threaded hole of the nut 50, the lower half part of the nails 60 is disposed in the lower sand mold 20 after passing through the lower molding surface 21, and at the same time, fillers 70 are disposed in the gap formed between the threaded surfaces inside the nails 60 and the nut 50, the upper half of the iron nails 60 is connected with the nuts 50 by the packing 70, and then the nuts 50 are connected on the lower molding surface 21 of the lower sand mold 20 by the iron nails 60.

In other embodiments, the iron nail 60 of the present invention may be replaced by other fixing members, such as a pin and an iron bar, and in short, as long as it is long-shaped, one part of the iron nail can be inserted into the nut 50, and the other part of the iron nail can be inserted into the lower sand mold 20. The filler 70 may be made of chrome sand, asbestos, or the like, as long as it can seal the screw hole of the nut 50 and wrap the iron nail 60.

The utility model discloses with the nut pre-buried in the casting die cavity, during the pouring, molten iron and nut periphery fuse, solidify the back at the molten iron, nut direct forming takes out filler 70 from nut 50's screw hole on the foundry goods for nut and foundry goods integrated into one piece utilize the nut directly to form a screw hole on the foundry goods simultaneously, need not to process the screw hole on the foundry goods through the mode of machining, under the prerequisite that satisfies foundry goods assembly requirement, has improved cast production efficiency, has reduced the processing cost.

In the preferred embodiment, the top end of the iron nail 60 as the fixing member is lower than the upper end surface of the nut 50, and the top of the filler 70 covers the top opening of the threaded hole of the nut 50, that is, the filler 70 wraps the top end of the iron nail 60, and when pouring, the filler 70 separates the iron nail 60 from the poured iron liquid, so that the iron liquid does not contact with the iron nail 60, and the iron nail 60 is prevented from being molded on the casting. In addition, in order to make the nut 50 firm and lower sand mould 20 cooperation, the nut takes place the displacement when avoiding pouring, and above-mentioned iron nail 60 is including the nut 61 that is located its bottom, and this nut 61 is arranged in the inside of lower sand mould 20, through burying nut 61 underground inside lower sand mould 20 for iron nail 60 and the inside area of contact increase of lower sand mould 20, improved the stability that iron nail 60 and lower sand mould 20 are connected.

In addition, a concave position 22 which is concave downwards is arranged on the lower die surface 21, the depth of the concave position 22 is smaller than the height of the nut 50, the nut 50 is arranged in the concave position 22, the lower end surface of the nut 50 is attached to the bottom wall 221 of the concave position 22, and a gap is formed between the side wall 222 of the concave position 22 and the outer side wall of the nut 50, so that the nut 50 protrudes out of the surface of a casting to meet some special assembly requirements, and a gap is formed between the outer side wall of the nut 50 and the side wall 222 of the concave position 22, so that molten iron can be combined with the outer side wall of the nut 50.

The upper sand mould 10 is wrapped by a cope flask 30, the lower sand mould 20 is wrapped by a drag flask 40, a plurality of positioning pieces for fixing the cope flask 30 and the drag flask 40 are arranged between the cope flask 30 and the drag flask 40, and the cope flask 30 and the drag flask 40 are fixed by the positioning pieces, so that the upper sand mould 10 and the lower sand mould 20 can be kept relatively fixed, and the relative displacement of the upper sand mould 10 and the lower sand mould 20 is avoided when molten iron is poured; the locating elements are locating pins 80 that extend across the cope flask 30 and the drag flask 40. The bottom peripheral edge of the cope flask 30 is provided with an outwardly extending upper tie plate 31, the top peripheral edge of the drag flask 40 is provided with an outwardly extending lower tie plate 41, the lower tie plate 41 abuts against the lower surface of the upper tie plate 31, and a positioning pin 80 extends across the upper and

lower tie plates

31, 41 to secure the cope flask 30 and the drag flask 40.

The above embodiments are only used to illustrate the technical solution of the present invention, and not to limit the same; although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that they can still make modifications to the technical solutions described in the foregoing embodiments, or make equivalent substitutions for some technical features, and these modifications or substitutions do not make the essence of the corresponding technical solutions depart from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

1. A sand mould component for casting is characterized by comprising an upper sand mould, a lower sand mould, a nut and a fixing piece;

2. The foundry sand mold assembly of claim 1 wherein the top end of the retainer is lower than the upper end surface of the nut and the top closure of the filler is at the top opening of the threaded bore of the nut.

3. A foundry sand mold assembly as set forth in claim 1, wherein the fixture is a nail including a nut at a bottom end thereof disposed within the lower sand mold.

4. The foundry sand mold assembly of claim 1 wherein the lower mold surface has a downwardly concave depression therein, the depression having a depth less than the height of the nut, the nut being disposed in the depression with the lower end surface of the nut engaging the bottom wall of the depression, the side wall of the depression forming a gap with the outer side wall of the nut.

5. The foundry sand mold assembly of claim 1 wherein the upper sand mold is externally wrapped with a cope flask and the lower sand mold is externally wrapped with a drag flask, and a plurality of locating members are disposed between the cope flask and the drag flask for securing the cope flask and the drag flask.

6. The foundry sand mold assembly of claim 5 wherein the positioning member is a positioning pin that traverses the cope flask and the drag flask.

7. The foundry sand mold assembly of claim 6 wherein the bottom peripheral edge of the cope flask is provided with an outwardly extending upper connector plate, the top peripheral edge of the drag flask is provided with an outwardly extending lower connector plate, the lower connector plate abuts a lower surface of the upper connector plate, and the locating pin traverses the upper and lower connector plates.