Extrusion manufacture technological method of accumulator cell lead ring

Abstract

The invention relates to a technological method for extruding and manufacturing a lead ring of a storage battery, and the method is characterized in that the specific process is as follows: a lower mould is heated to be above 50 DEG C; 1) lead is melted; 2) an upper mould and the lower mould are closed and sealed by pressure; 3) lead liquid is poured into the mould through the feeding port of the upper mold by gravity; at the moment, the cooling temperature of the upper mold is below 300 DEG C; 4) the lead liquid is solidified for at least 5 seconds; 5) the mandril of the lower mould moves upwards and extrudes redundant lead from the feeding port; and 6) the molded lead ring is de-molded. The technological method has the following advantages: as an added lower oil cylinder moves downwards, the oil cylinder extrudes the lead liquid in the process solidification, the produced product has increased inner density and decreased porosity which is less than 1 percent, the product molding property is good and the surface is smooth; as the porosity is low, a permeable channel for acid in the storage battery does not exist, thus reducing bad contact between wire and the lead ring caused by acid permeability effectively and prolonging the service life of the storage battery effectively.

Description

technical field [0001] The invention is a process method for manufacturing battery lead rings. Background technique [0002] The lead ring is widely used in the positive and negative terminals of the battery, and is the conventional contact point for connecting the battery to the engine. The product quality of the lead ring has an important relationship with the performance of the battery. There are two existing processes for producing lead rings. One is the manual pouring process, first melting the lead, then manually pouring the lead liquid into the mold, cooling at room temperature, manual demoulding, and then taking out the workpiece. The lead ring produced by this process has poor formability, unstable quality, and rough surface of the lead ring; due to the manual pouring, the pouring speed is not easy to control, and the pouring speed varies from fast to slow, resulting in temperature changes. The crack phenomenon causes the acid in the battery to penetrate outward ...

AI Technical Summary

Problems solved by technology

The disadvantage of this process method is that the lead liquid is squeezed into the mold by external pressure, and there is a large amount of air in the mold at this time. Due to the fast entry of the lead liquid, the air in the mold is too late to be discharged, which will inevitably cause the lead liquid to be mixed with the air. Mixing, resulting in a large number of pores in the product during the molding process, the porosity is as high as 4%; due to the large number of pores inside the lead ring, the acid in the battery will climb to the surface through the pores during the use of the lead ring, resulting in double damage to the battery. The end is covered with white lead sulfate, which may even cause poor contact of the battery and affect the service life of the battery

At the same time, because there are a lot of air holes in the lead ring, splashes will be generated when the lead ring is welded, which will seriously cause human injury. Therefore, the face and other body parts of the operator should be protected during operation.

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