Heating and thermal insulating pouring cup and manufacturing method thereof

Abstract

The invention discloses a heating and thermal insulating pouring cup and a manufacturing method thereof. The heating and thermal insulating pouring cup is characterized in that a pouring cup material is formed by a heating material and a thermal insulating material through a bonding material, the thermal insulating material is formed by asbestos, refractory sand and refractory fibers, the heating material is formed by aluminite powder, silica powder and iron oxide powder, and the bonding material is resin and a hardening agent. The pouring cup material comprises that the thermal insulating material comprises, by weight, 70%-80% of the refractory sand, 3%-5% of the refractory fibers and 3%-5% of the asbestos; the heating material comprises, by weight, 6%-9% of the aluminite powder, 6%-9% of the silica powder and 1%-2% of the iron oxide powder; the bonding material comprises, by weight, 6%-8% of the resin and 3%-4% of the hardening agent. According to the pouring cup, it is guaranteed that casting liquid can be continuously heated, thermal insulating can be achieved, the shrinkage and air holes in the casting forming process can be lowered, the finished casting product rate and the casting quality are increased, and the casting yield is increased.

Description

technical field [0001] The invention relates to the technical field of casting, and relates to a sprue cup for guiding liquid metal into a channel in a mold, in particular to a heat-insulating sprue cup for casting and a manufacturing method thereof. Background technique [0002] In the process of casting molding production, sprue cups are often used. The sprue cups are mainly used to guide the casting liquid into the channel of the cavity. They are an important part of the gating system, especially for precision casting technology. When pouring the casting cavity, the casting liquid enters the channel of the casting cavity from the sprue cup for pouring. The sprue cup can avoid the splashing of the casting liquid and guide the casting liquid into the cavity. The stock of the casting liquid in the sprue cup is controlled within a certain height range , It is easy to form a vortex form, and slag inclusions, gases, etc. are easily involved in the mold, causing problems such ...

AI Technical Summary

Problems solved by technology

[0003] In the prior art, the casting liquid in the sprue cup has a certain level of stock, and it takes a certain time for the casting liquid to continuously pour into the cavity from the sprue cup. There is a problem of cooling down the molten iron in the sprue cup. When the molten iron enters the mold cavity, the slag and gas in the molten iron are brought into the casting cavity at the same time, causing pores in the casting, and the density of the casting is not enough to cause looseness, which seriously affects the quality of the casting; in order to prevent the casting liquid from cooling down rapidly in the sprue cup, Usually, the sprue cup is made larger and has a larger capacity, so that the molten iron can enter the cavity faster, which causes a large waste of molten iron and higher cost

[0004] At the same time, under the impact of high-temperature molten iron, the thermal stress and high-temperature corrosion resistance of the sprue cup are limited by the material, which is prone to deformation loss. The sprue cup is not strong enough and has poor thermoplastic resistance. Problems may occur during the casting process, which directly affects the quality of the casting. , for this reason, it is necessary to improve the materials and process methods of sprue cups for sand casting in order to obtain higher casting quality and production efficiency