Device for integrally forming multiple sand cores

Abstract

The utility model discloses a device for integrally forming a plurality of sand cores, which comprises a fixed die and a movable die, a first sand core movable block assembly and a second sand core movable block assembly are arranged between the fixed die and the movable die, and the first sand core movable block assembly consists of a first movable block, a second movable block and a first sand core. And the second sand core movable block assembly consists of a third movable block, a fourth movable block and a second sand core. The beneficial effects of the utility model are that the production assembly process is cancelled, and the labor time cost is reduced; a coating brushing procedure is omitted, coating cost is saved, core making efficiency is improved, the defect that cast products have burrs due to blank seams caused by uneven coating assembling and brushing is overcome, the percent of pass of the cast products is improved, simple movable blocks are used for assembling treatment, and the problem of sand core assembling abrasion caused by complex movable blocks is solved. And the qualification rate of sand core products is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of high-precision hydraulic parts casting, in particular to a device for integrated molding of multiple sand cores. Background Art

[0002] In the prior art, when high-precision hydraulic parts are cast, the criss-cross flow channels inside are formed by sand cores, and the sand cores with complex shapes are generally composed of multiple sand cores. Due to the different technical levels and proficiency of sand core assemblers, sand core assembly brings many shortcomings:

[0003] 1. During the original sand core assembly operation, it is necessary to first apply glue to the sand core gluing area, then place the first sand core and the second sand core, and wait for the glue to harden before applying paint, which takes a long time to produce;

[0004] 2. Due to the high requirements for the appearance of the casting, there must be no burrs inside the product (that is, the assembly area of ​​the sand core must be flat). When designing the sand core, the bottom of the mold must have an R angle, that is, the produced sand core also has an R angle;

[0005] 3. It is difficult to control the amount of glue used by employees, and they are prone to over-applying glue. During the assembly process, the glue is prone to overflowing, and manual de-glueing is required. During the de-glueing process, the surface of the sand core is easily damaged. Utility Model Content

[0006] The purpose of the utility model is to provide a device for integrally molding a plurality of sand cores, so as to solve the problems raised in the above-mentioned background technology.

[0007] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: a device for integrated molding of multiple sand cores, including a fixed mold and a movable mold, a first sand core movable block assembly and a second sand core movable block assembly are placed between the fixed mold and the movable mold, the first sand core movable block assembly is composed of a first movable block, a second movable block and a first sand core, and the second sand core movable block assembly is composed of a third movable block, a fourth movable block and a second sand core.

[0008] Further optimized, the first movable block, the second movable block, the third movable block and the fourth movable block are respectively provided with a first anti-error boss and a second anti-error boss at one end.

[0009] Further optimized, the outer sides of the first movable block, the second movable block, the third movable block and the fourth movable block are respectively provided with a draft angle of 1.5°.

[0010] Further optimized, the other ends of the first movable block, the second movable block, the third movable block and the fourth movable block away from the first anti-error boss and the second anti-error boss are arranged to have a pointed structure.

[0011] Further optimized, a cavity for placing the first sand core movable block assembly and the second sand core movable block assembly is opened on a side of the movable mold close to the fixed mold.

[0012] Beneficial Effects

[0013] The device for integrated molding of multiple sand cores provided by the utility model eliminates the production assembly process and reduces the labor time cost; eliminates the coating process and saves the coating cost, while improving the core making efficiency, eliminating the defects of burrs in the casting products caused by the existence of blank seams due to uneven coating during assembly, and improving the qualified rate of the casting products; uses simple movable block assembly processing to eliminate the sand core assembly wear problem caused by complex movable blocks, and improves the qualified rate of the sand core products. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 It is a schematic cross-sectional view of the overall structure of the utility model;

[0015] Figure 2 This is a schematic structural diagram of the first sand core movable block assembly of the utility model;

[0016] Figure 3 It is a schematic structural diagram of the second sand core movable block assembly of the utility model. DETAILED DESCRIPTION

[0017] The following are specific embodiments of the present invention and the accompanying drawings to further describe the technical solution of the present invention, but the present invention is not limited to these embodiments.

[0018] Example

[0019] like Figure 1-3 As shown, a device for integrated molding of multiple sand cores includes a fixed mold 1 and a movable mold 2, between which a first sand core movable block assembly 3 and a second sand core movable block assembly 12 are placed, the first sand core movable block assembly 3 is composed of a first movable block 4, a second movable block 5 and a first sand core 6, and the second sand core movable block assembly 12 is composed of a third movable block 9, a fourth movable block 10 and a second sand core 11.

[0020] In this embodiment, the first movable block 4, the second movable block 5, the third movable block 9, and the fourth movable block 10 are respectively provided with a first anti-mistake boss 7 and a second anti-mistake boss 13 at one end to prevent the movable block from making a mistake and causing a bad shape of the sand core. The first movable block 4, the second movable block 5, the third movable block 9, and the fourth movable block 10 are respectively provided with a draft angle of 1.5° on the outside, which reduces the weight of the movable block and facilitates the separation of the hot core box mold and the movable block.

[0021] The other ends of the first movable block 4, the second movable block 5, the third movable block 9 and the fourth movable block 10 away from the first anti-error boss 7 and the second anti-error boss 13 are arranged in a pointed structure. After sandblasting, the R corner of the original sand core head is covered to form a new integrated sand core (forming a seamless sand core), thereby eliminating the assembly and painting processes.

[0022] A cavity for placing the first sand core movable block assembly 3 and the second sand core movable block assembly 12 is provided on one side of the movable mold 2 close to the fixed mold 1 .

[0023] Make the first sand core and the second sand core by using the hot core box;

[0024] Combine the two movable blocks and the sand core to form a sand core movable block assembly and place it in the movable mold;

[0025] The movable mold moves toward the fixed mold and the mold is closed;

[0026] After sand blowing, heating and curing the main sand core mold, take out the sand core;

[0027] Take out the two sand core movable block assemblies and the sand core separately, and then take out the whole sand core.

[0028] A draft angle of 1.5° is designed for the contact between the four loose blocks and the hot core box mold, which reduces the weight of the loose blocks and facilitates the separation of the hot core box mold and the loose blocks; anti-mistake bosses are added to the bottom of loose blocks 1, 2, 3, and 4 to prevent the loose blocks from being misplaced and causing the sand core to have a poor shape; the curing time of the original sand core is shortened by 10 seconds, because the whole sand core needs to be cured after the new hot core box is placed, thereby improving the production time;

[0029] After the heads of the four movable blocks are set to sharp angles, the R angle of the original sand core head is covered after sandblasting, forming a new integrated sand core 1 (forming a sand core without blank seams), thereby eliminating the process of assembly and painting.

[0030] Finally, it should be noted that the above description is only a preferred embodiment of the utility model and is not intended to limit the utility model. Although the utility model is described in detail with reference to the aforementioned embodiments, those skilled in the art can still modify the technical solutions recorded in the aforementioned embodiments or replace some of the technical features therein by equivalents. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the utility model shall be included in the utility model content within the protection scope of the utility model.

Claims

1. A device for integrated molding of multiple sand cores, characterized in that: The invention comprises a fixed mold (1) and a movable mold (2), wherein a first sand core movable block assembly (3) and a second sand core movable block assembly (12) are placed between the fixed mold (1) and the movable mold (2), wherein the first sand core movable block assembly (3) is composed of a first movable block (4), a second movable block (5) and a first sand core (6), and the second sand core movable block assembly (12) is composed of a third movable block (9), a fourth movable block (10) and a second sand core (11).

2. The device for integrated molding of multiple sand cores according to claim 1, characterized in that: One end of the first movable block (4), the second movable block (5), the third movable block (9) and the fourth movable block (10) is respectively provided with a first anti-error boss (7) and a second anti-error boss (13).

3. The device for integrated molding of multiple sand cores according to claim 2, characterized in that: The outer sides of the first movable block (4), the second movable block (5), the third movable block (9) and the fourth movable block (10) are respectively provided with a draft angle of 1.5°.

4. The device for integrated molding of multiple sand cores according to claim 2, characterized in that: The other ends of the first movable block (4), the second movable block (5), the third movable block (9) and the fourth movable block (10) away from the first anti-error boss (7) and the second anti-error boss (13) are arranged in a pointed structure.

5. The device for integrated molding of multiple sand cores according to claim 1, characterized in that: A cavity for placing the first sand core movable block assembly (3) and the second sand core movable block assembly (12) is provided on a side of the movable mold (2) close to the fixed mold (1).

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