Preparation method of slant-rolling tin ball

Abstract

The invention belongs to the field of tin anode materials for electroplating industry, in particular to a preparation method of a slant-rolling tin ball. The scheme is that a pure tin raw material is placed in a smelting furnace for smelting, melt purification treatment processes such as degassing-deslagging are carried out, tin liquid is led in a maintaining furnace after completion, a smelting body after filtering is led in a wheel groove of a continuous casting squeezing machine, a solid state is formed under a cooling effect of a casting squeezing wheel, a mold is squeezed out and molded under a friction force effect of the wheel groove, a high-pure tin rod is prepared, then the tin rod is introduced in a slant-rolling machine for slantly rolling, the tin ball at needed diameter is obtained, and washing, surface treatment and stoving of the tin ball are carried out, and products of the slant-rolling tin ball are prepared. The products prepared by the preparation method are good in homogeneity, good in degree of sphericity, free of girdle, low in oxygen content, few in part texture defects and high in molding efficiency.

Description

technical field [0001] The invention belongs to the field of tin anode materials used in the electroplating industry, and in particular relates to a method for preparing skew-rolled tin balls (Φ12-45mm). Background technique [0002] At present, there are no more than two methods of preparing tin ball anode products used in the electroplating industry, one is the casting method, and the other is the cold heading method. The casting method consists of manual casting and mechanical automatic casting. Manual casting, that is, the operator uses a container to scoop out tin on the surface of the tin liquid and then injects it into the mold, and cools it in the mold with cooling circulating water. Molding, low efficiency, shrinkage holes or casting slag spots will appear on the surface of the product, and sometimes rings are easy to form, and defects such as air bubbles and pores are easy to appear inside the product; the efficiency of mechanical automatic casting method is higher...

AI Technical Summary

Problems solved by technology

The casting method consists of manual casting and mechanical automatic casting. Manual casting, that is, the operator uses a container to scoop out tin on the surface of the tin liquid and then injects it into the mold, and cools it in the mold with cooling circulating water. Mold removal, low efficiency, shrinkage holes or casting slag spots will appear on the surface of the product, and sometimes rings are easy to form, and defects such as air bubbles and pores are easy to appear inside the product; the efficiency of mechanical automatic casting method is higher than that of manual casting, but the defects that are easy to produce in the product are the same as manual casting Casting method is similar

The cold heading method first needs to cast the material into an ingot and then extrude it into a rod, and then carry out cold heading forming. In the extrusion process, the joint of the two ingots is a weak link, which is easy to cause fracture. A small amount of lubricating oil coated on the surface of the ingot and the ingot The oxide skin on the surface is easily brought into the tissue during the extrusion process to cause internal tissue defects. At the same time, the formed rod is introduced into the cold heading machine, and it is formed by cold heading under the action of lubricating oil. The solder ball needs to be further cleaned and dried. Not only the process It is cumbersome, and if it is not cleaned cleanly, it will affect subsequent use