Cold core

Abstract

The invention relates to a coil core, which comprises sand core main body. Wherein, it is formed by upper and lower cores whose edges are compressed; the sand core has chamber with dual connecting posts fixed with upper and lower cores; the thickness of main body is 10-60mm. And the production comprises that producing upper and lower cores whose connecting surfaces relative to the connecting post are lower than side wall, and central has through hole; the upper and lower cores are opposite, to align their through holes; compressing upper and lower cores, to connect their through holes to form connecting posts. The invention can obtain hollow sand core main body, to confirm support strength, and avoid crack.

Description

technical field

[0001] The invention relates to a sand core used in casting molding, in particular to the improvement of the structure of the cold core sand core and its manufacturing method. Background technique

[0002] The sand cores used in the foundry industry can be divided into hot cores and cold cores according to the different manufacturing processes. The hot core is to harden the core sand in the core box by heating the core box. However, during the production process, the core box It is easy to deform due to heat, which will affect the shape and size of the sand core; while the cold core is made by mixing the core sand with the binder resin and then adding a curing agent to make it harden at a temperature below 80 ° C. According to the curing agent The difference is divided into triethylamine method, sulfur dioxide method, β method, etc. Taking triethylamine method as an example, the basic process method is: ① put the core sand mixed wi...

Examples

Embodiment 1

[0028] Embodiment 1: Referring to accompanying drawings 1 to 3, a cold core includes a sand core body 6, the body includes an upper core 1 and a lower core 2, a cavity 3 is provided in the body, and a There are reinforcing ribs 6, and nine connected core columns 4 for connecting the upper core and the lower core. There are three connected core columns arranged on the rib 5, and one connected core column 4 is respectively arranged in the cavity of the left and right wings. The spacing is 200 mm; the wall thickness between the inner wall and the outer wall of the body cavity is 20 mm.

[0029] The manufacturing method of the cold core of the present embodiment comprises the following steps:

[0030] (1) The upper core and the lower core are respectively made by the first and second 3C core shooters;

[0031] (2) Place the sand core of one of the upper core or the lower core in the third 3C core shooting machine, turn the other sand core 180 degrees, and place it in the third 3...

Embodiment 2

[0036] Embodiment 2: A cold core, including a sand core body, the body is mainly composed of an upper core and a lower core, a cavity is provided in the body, the wall thickness of the body is between 10 mm and 60 mm, and the upper core and the lower core are The integral sand core is formed by compounding. In this embodiment, the upper core and the lower core are glued together to form an integral structure.

technical field

[0001] The invention relates to a sand core used in casting molding, in particular to the improvement of the structure of the cold core sand core and its manufacturing method. Background technique

[0002] The sand cores used in the foundry industry can be divided into hot cores and cold cores according to the different manufacturing processes. The hot core is to harden the core sand in the core box by heating the core box. However, during the production process, the core box It is easy to deform due to heat, which will affect the shape and size of the sand core; while the cold core is made by mixing the core sand with the binder resin and then adding a curing agent to make it harden at a temperature below 80 ° C. According to the curing agent The difference is divided into triethylamine method, sulfur dioxide method, β method, etc. Taking triethylamine method as an example, the basic process method is: ① put the core sand mixed wi...

Examples

Embodiment 1

[0028] Embodiment 1: Referring to accompanying drawings 1 to 3, a cold core includes a sand core body 6, the body includes an upper core 1 and a lower core 2, a cavity 3 is provided in the body, and a There are reinforcing ribs 6, and nine connected core columns 4 for connecting the upper core and the lower core. There are three connected core columns arranged on the rib 5, and one connected core column 4 is respectively arranged in the cavity of the left and right wings. The spacing is 200 mm; the wall thickness between the inner wall and the outer wall of the body cavity is 20 mm.

[0029] The manufacturing method of the cold core of the present embodiment comprises the following steps:

[0030] (1) The upper core and the lower core are respectively made by the first and second 3C core shooters;

[0031] (2) Place the sand core of one of the upper core or the lower core in the third 3C core shooting machine, turn the other sand core 180 degrees, and place it in the third 3...

Embodiment 2

[0036] Embodiment 2: A cold core, including a sand core body, the body is mainly composed of an upper core and a lower core, a cavity is provided in the body, the wall thickness of the body is between 10 mm and 60 mm, and the upper core and the lower core are The integral sand core is formed by compounding. In this embodiment, the upper core and the lower core are glued together to form an integral structure.

Images