CN212917540U - Combined precoated sand casting sand core - Google Patents

Abstract

The utility model provides a modular precoated sand casting psammitolite, comprises bilateral symmetry's two parts, all is equipped with a plurality of sand core monomer of arranging along the fore-and-aft direction in its left and right sides two parts, and two adjacent sand core monomers link together, set up sand core location portion respectively at its front and back both ends, sand core location portion will control two parts and connect as an organic wholely, and when the psammitolite was closed with the sand mould, the sand core location concave trough that sets up on the modular precoated sand casting sand mould cooperated sand mould location portion, realizes the location of modular precoated sand casting psammitolite. The utility model discloses not only save the time of precoated sand casting mould assembling operation, improved work efficiency, make full use of combination formula precoated sand casting sand mould effective area moreover, reduced manufacturing cost.

Description

Combined precoated sand casting sand core

Technical Field

The utility model relates to a casting core, especially a be suitable for combination formula psammitolite of precoated sand casting.

Background

The precoated sand refers to molding sand or core sand with a layer of solidified resin film coated on the surface of the sand before molding, and precoated sand casting is a process method for casting a blank by combining a sand mold made of the precoated sand and a sand core to form a casting cavity, then casting liquid metal in the casting cavity, cooling, and then removing the sand mold and the sand core, cleaning a casting head and the like. For the small casting formed by the precoated sand casting process, in order to improve the availability of liquid metal, the sand core is generally designed into a structure formed by combining a plurality of monomers, such as the precoated sand casting sand core and sand mold matching structure of an elbow pipe fitting shown in the attached drawings 1 to 3, wherein four elbow sand core monomers SXDT are combined to form an annular sand core 1, and then six annular sand cores 1 are matched with an integral sand mold 2 to form a cavity XQ capable of casting twenty-four elbow pipe fitting products.

According to the sand core and sand mold matching structure, before box assembling, six annular sand cores 1 are required to be placed in an integral sand mold 2 one by one, positioning is required to be completed through matching of positioning bosses 1-1 arranged on the annular sand cores 1 and positioning grooves 2-1 in the integral sand mold 2, and as six times of sand core positioning operation is performed in each integral sand mold 2, the defects of long box assembling operation time and low working efficiency exist, and the consistency of production beats of all working procedures in the casting process is influenced.

SUMMERY OF THE UTILITY MODEL

The utility model provides a modular precoated sand casting psammitolite aims at the optimal design through to psammitolite monomer integrated configuration to shorten sand mould and psammitolite mould assembling time, increase the quantity of casting die cavity shaping product, reach the purpose that improves the availability ratio and work efficiency of liquid metal.

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

the utility model provides a modular precoated sand casting psammitolite, comprises bilateral symmetry's two parts, all is equipped with a plurality of sand core monomer of arranging along the fore-and-aft direction in its left and right sides two parts, and two adjacent sand core monomers link together, set up sand core location portion respectively at its front and back both ends, sand core location portion will control two parts and connect as an organic wholely, and when the psammitolite was closed with the sand mould, the sand core location concave trough that sets up on the modular precoated sand casting sand mould cooperated sand mould location portion, realizes the location of modular precoated sand casting psammitolite.

According to the combined type precoated sand casting sand core, a casting pipe fitting formed by matching the combined type precoated sand casting sand core and the combined type precoated sand casting sand mold is an elbow, and the shape and the size of the outer surface of a single sand core body are consistent with those of an inner hole of an elbow blank.

The combined type precoated sand casting sand core is characterized in that the left part and the right part are respectively provided with four sand core monomers which are sequentially arranged along the front-back direction, and the four combined type precoated sand casting sand cores are matched with a combined type precoated sand casting sand mold which is provided with four mold cavities along the left-right direction to form a mold cavity capable of casting thirty-two elbow pipe fitting products.

The combined type precoated sand casting sand core is of a solid sand core structure.

The utility model provides a combined precoated sand casting sand core, which is provided with a plurality of sand core monomers which are arranged in sequence along the front and back directions at the left part and the right part, compared with the precoated sand casting annular sand core in the prior art, because the quantity of the sand core monomers is increased in each combined precoated sand casting sand core, when the combined precoated sand casting sand mold box is combined with the combined precoated sand casting sand mold box, the sand core containing more sand core monomers can be placed in the combined precoated sand casting sand mold at one time; meanwhile, the length-width ratio of the combined type precoated sand casting sand core is optimized due to the longitudinally arranged sand core monomers, so that the number of the cavities in the combined type precoated sand casting sand mold is increased; therefore, the utility model discloses not only save the time of mould assembling operation, improved work efficiency, make full use of combination formula tectorial membrane sand casting sand mould effective area moreover, reduced manufacturing cost.

Drawings

FIG. 1 is a schematic diagram of a ring-shaped sand core structure used for molding an elbow pipe fitting by a precoated sand casting process in the prior art;

FIG. 2 is a schematic illustration of an integral sand mold structure cooperating with the annular sand core of FIG. 1;

FIG. 3 is a schematic view of the mating of the annular sand core of FIG. 1 with the integral sand mold of FIG. 2;

FIG. 4 is a schematic view of the combined precoated sand casting core of the present invention;

FIG. 5 is a schematic structural view of a combined coated sand casting mold that cooperates with the combined coated sand casting core of FIG. 4;

fig. 6 is a schematic view of the configuration of the combined coated sand casting core of fig. 4 in cooperation with the combined coated sand casting sand mold of fig. 5.

The list of labels in the figure is:

1. 1-1 parts of an annular sand core and a positioning boss;

2. 2-1 parts of an integral sand mold and positioning grooves;

3. 3-1, casting a sand core by using combined precoated sand, and positioning a sand core positioning part;

4. 4-1, casting a sand mold by using combined precoated sand, and positioning a groove by using a sand core;

SXDT, sand core monomer, XQ and cavity.

Detailed Description

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

The utility model discloses a preferred embodiment is used for the casting production of elbow pipe fitting, in this embodiment:

referring to fig. 3, 4 and 5, the combined precoated sand casting sand core 3 is a solid sand core, and has a bilateral symmetry structure, wherein four sand core monomers SXDT are arranged on the left part and the right part of the sand core, the four sand core monomers SXDT are sequentially arranged along the front and back direction, two adjacent sand core monomers SXDT are connected together, sand core positioning parts 3-1 which are transversely connected into a whole are respectively arranged at the front end and the back end of the sand core, and when the sand core is combined with the sand mold, the positioning of the combined precoated sand casting sand core 3 is realized through the matching of the sand core positioning parts 3-1 and the sand core positioning concave groove 4-1 arranged on the combined precoated sand casting.

Referring to fig. 4, 5, 6, combination formula precoated sand casting psammitolite 3, its psammitolite monomer SXDT surface is unanimous with the hole shape and size of elbow blank, four combination formula precoated sand casting psammitolites 3 and the combination formula precoated sand casting sand mould 4 cooperation that is equipped with four die cavitys along controlling the direction, form the die cavity XQ that can cast into thirty two elbow pipe fitting products of type.

Referring to fig. 1 to 6, the combined precoated sand casting core 3 according to the present invention, compared with the prior art precoated sand casting ring core 1, increases the number of core monomers SXDT in each combined precoated sand casting core 3, and allows for one-step placement of the combined precoated sand casting core 3 containing more core monomers SXDT in the combined precoated sand casting mold 4 when being combined with the combined precoated sand casting mold 4; meanwhile, the length-width ratio of the combined precoated sand casting sand core 3 is optimized due to the sand core monomers SXDT which are longitudinally arranged, so that the number of the cavities in the combined precoated sand casting sand mold 4 can be increased; consequently adopt the utility model discloses not only save the time of mould assembling operation, improved work efficiency, make full use of the effective area of combination formula tectorial membrane sand casting sand mould 4 moreover, reduced manufacturing cost.

Claims (4)

1. The combined type precoated sand casting sand core is characterized in that the combined type precoated sand casting sand core (3) is composed of two parts which are bilaterally symmetrical, a plurality of sand core monomers (SXDT) which are sequentially arranged in the front-back direction are arranged on the left part and the right part of the combined type precoated sand casting sand core, the two adjacent sand core monomers (SXDT) are connected together, sand core positioning parts (3-1) are respectively arranged at the front end and the back end of the combined type precoated sand casting sand core, the left part and the right part are connected into a whole by the sand core positioning parts (3-1), and when the sand core is combined with a sand mold, the sand core positioning parts (3-1) are matched with sand core positioning concave grooves (4-1) arranged on the combined type precoated sand casting.

2. A combined precoated sand casting core according to claim 1, wherein the casting pipe formed by the combination of said core (3) and sand casting mold (4) is an elbow, and the outer surface of said core body (SXDT) conforms to the shape and size of the inner bore of the elbow blank.

3. A combined precoated sand casting core according to claim 2, wherein four core elements (SXDT) are provided in the left and right parts in a row in the front-rear direction, and the four combined precoated sand casting cores (3) are fitted to a combined precoated sand casting mold (4) having four cavities in the left-right direction to form cavities (XQ) for casting thirty-two elbow pipe products.

4. A combined precoated sand casting core according to claim 1, 2 or 3, characterized in that said combined precoated sand casting core (3) is a solid core structure.

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