Atmospheric pressure spherical sand riser bush and manufacturing method

Abstract

The invention relates to a riser bush, in particular to an atmospheric pressure spherical sand riser bush and a manufacturing method thereof. The atmospheric pressure spherical sand riser bush comprises a riser body and spire sand, wherein a riser neck communicating with the riser body is arranged at the lower end of the riser body, a liquid storage cavity is formed between the riser body and the riser neck, an air outlet communicating with the liquid storage cavity is formed in the top end of the riser body, the spire sand is arranged on the inner cavity wall of the riser body, a liquid outlet communicating with the liquid storage cavity is formed in the bottom of the riser neck, and an annular protrusion is arranged on the liquid outlet. The manufacturing method comprises the following steps that the atmospheric pressure spherical sand riser bush is parted; a snap fastener structure is arranged on a parted mold; and forming manufacturing is carried out by using the mold after parting. According to the atmospheric pressure spherical sand riser bush, the problem that the feeding efficiency of an open top riser is low is solved, the feeding efficiency of the formed atmospheric pressure spherical riser is obviously improved, the process yield of a casting is improved, and the sand-iron ratio and the production cost are reduced.

Description

technical field

[0001] The invention relates to a riser sleeve, in particular to an atmospheric pressure spherical sand riser sleeve and a manufacturing method thereof. Background technique

[0002] In the process design of gray iron castings, open-top risers are usually used for feeding. The open-top riser is a cavity brought out by the wooden mold during molding. When pouring, the molten iron fills the cavity to form a riser to feed the casting. Since the top of the open top riser is exposed in the air, the cooling speed is fast and the feeding efficiency is low. In order to realize the effective feeding of castings, it is necessary to use a large diameter and high height open top riser. The riser uses a lot of molten iron, which leads to a low process yield, and the high height of the riser leads to an increase in the height of the sandbox. As the molding sand increases, the sand-iron ratio increases accordingly, and the low process yield and high sand-iron ratio lead to...

Examples

Embodiment 1

[0031] Such as Figure 1-Figure 2 , an atmospheric pressure spherical sand riser sleeve 1, including a riser body 4 and a pointed sand 2.

[0032] The main body of the atmospheric pressure spherical sand riser sleeve 1 is a riser body 4, and the riser body 4 has a spherical structure. For the geometry of the same volume, the specific surface area of ​​the spherical shape is the smallest, the thermal modulus is the largest, the heat dissipation of the riser body is slow, and the feeding efficiency is high. For castings with the same volume, the amount of molten iron required for the spherical riser is the least.

[0033] An air outlet hole 3 is arranged at the middle position of the top of the riser body 4 . The air outlet hole 3 is a through cylindrical hole, the main function is to communicate with the atmosphere, cooperate with the peak sand 2 to form an atmospheric pressure riser, improve the feeding efficiency of the riser, and the air in the cavity and the riser can be r...

Embodiment 2

[0042] A kind of manufacture method of atmospheric pressure spherical sand riser sleeve, such as image 3 , the molding method of the atmospheric pressure spherical sand riser cover is that the upper and lower halves are respectively formed, and the horizontal maximum diameter of the riser body 4 is divided into types. The riser cover is composed of an upper riser cover 7 and a lower riser cover 8. The upper part The riser sleeve 7 and the lower riser sleeve 8 are provided with a buckle structure to cooperate to form an atmospheric pressure spherical riser. The riser sleeve can be realized by manual molding or core shooting machine, and two sets of molds are needed for molding.

Embodiment 3

[0044] A kind of manufacture method of atmospheric pressure spherical sand riser sleeve, such as Figure 4, the molding method of the atmospheric pressure spherical sand riser sleeve is that the left and right halves are respectively formed, and the vertical maximum diameter of the riser body 4 is divided into types, and the riser sleeve is composed of a left riser sleeve 9 and a right riser sleeve 10 , The left riser cover 9 and the right riser cover 10 are provided with a snap-in button structure to cooperate to form an atmospheric pressure spherical riser. The riser sleeve can be realized by hand molding or core shooting machine. Such as Figure 5 , the buckle structure 91 of the riser cover 9 is a protruding structure 1, the buckle structure 92 is a pit structure 1, the buckle structure 93 is a pit structure 2, and the buckle structure 94 is a protruding structure 2, wherein, The protruding structure 1 and the dimple structure 2 have the same shape and structure, which c...

technical field

[0001] The invention relates to a riser sleeve, in particular to an atmospheric pressure spherical sand riser sleeve and a manufacturing method thereof. Background technique

[0002] In the process design of gray iron castings, open-top risers are usually used for feeding. The open-top riser is a cavity brought out by the wooden mold during molding. When pouring, the molten iron fills the cavity to form a riser to feed the casting. Since the top of the open top riser is exposed in the air, the cooling speed is fast and the feeding efficiency is low. In order to realize the effective feeding of castings, it is necessary to use a large diameter and high height open top riser. The riser uses a lot of molten iron, which leads to a low process yield, and the high height of the riser leads to an increase in the height of the sandbox. As the molding sand increases, the sand-iron ratio increases accordingly, and the low process yield and high sand-iron ratio lead to...

Examples

Embodiment 1

[0031] Such as Figure 1-Figure 2 , an atmospheric pressure spherical sand riser sleeve 1, including a riser body 4 and a pointed sand 2.

[0032] The main body of the atmospheric pressure spherical sand riser sleeve 1 is a riser body 4, and the riser body 4 has a spherical structure. For the geometry of the same volume, the specific surface area of ​​the spherical shape is the smallest, the thermal modulus is the largest, the heat dissipation of the riser body is slow, and the feeding efficiency is high. For castings with the same volume, the amount of molten iron required for the spherical riser is the least.

[0033] An air outlet hole 3 is arranged at the middle position of the top of the riser body 4 . The air outlet hole 3 is a through cylindrical hole, the main function is to communicate with the atmosphere, cooperate with the peak sand 2 to form an atmospheric pressure riser, improve the feeding efficiency of the riser, and the air in the cavity and the riser can be r...

Embodiment 2

[0042] A kind of manufacture method of atmospheric pressure spherical sand riser sleeve, such as image 3 , the molding method of the atmospheric pressure spherical sand riser cover is that the upper and lower halves are respectively formed, and the horizontal maximum diameter of the riser body 4 is divided into types. The riser cover is composed of an upper riser cover 7 and a lower riser cover 8. The upper part The riser sleeve 7 and the lower riser sleeve 8 are provided with a buckle structure to cooperate to form an atmospheric pressure spherical riser. The riser sleeve can be realized by manual molding or core shooting machine, and two sets of molds are needed for molding.

Embodiment 3

[0044] A kind of manufacture method of atmospheric pressure spherical sand riser sleeve, such as Figure 4, the molding method of the atmospheric pressure spherical sand riser sleeve is that the left and right halves are respectively formed, and the vertical maximum diameter of the riser body 4 is divided into types, and the riser sleeve is composed of a left riser sleeve 9 and a right riser sleeve 10 , The left riser cover 9 and the right riser cover 10 are provided with a snap-in button structure to cooperate to form an atmospheric pressure spherical riser. The riser sleeve can be realized by hand molding or core shooting machine. Such as Figure 5 , the buckle structure 91 of the riser cover 9 is a protruding structure 1, the buckle structure 92 is a pit structure 1, the buckle structure 93 is a pit structure 2, and the buckle structure 94 is a protruding structure 2, wherein, The protruding structure 1 and the dimple structure 2 have the same shape and structure, which c...

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