Wirtz – Gravity Flow Caster

Introduction to Gravity Casting 

As one of the earliest methods of metal fabrication, gravity casting has consistently proven to be a reliable, affordable, and versatile technology, serving a wide range of global markets. 

Wirtz Manufacturing: Leading Innovation Since 1955 

Since 1955, Wirtz Manufacturing has been a leader in gravity cast book-mold equipment, tooling, and technology for the lead-acid battery industry. Billions of battery grids and millions of batteries manufactured by Wirtz have been crucial in markets ranging from aeronautics to golf carts. 

Advantages of Wirtz Gravity Casting 

Wirtz’s gravity casting technology offers several benefits, including superior grain structure control and excellent paste adhesion properties. Its versatility allows it to handle various alloys and accommodate multiple grid designs and geometries, making it a preferred choice in the lead-acid battery market. 

Innovation through the Gravity FlowCaster 

In its commitment to continuous improvement, Wirtz has enhanced traditional gravity casting, developing the Gravity FlowCaster. This innovative machine maintains the performance advantages of traditional casting while delivering a continuous web of grid material, facilitating a complete reel-to-reel solution. 

Grain Structure Analysis 

Micrographs reveal that the grain size, type, and homogeneity of gravity-cast and Gravity FlowCast antimony alloy grids are remarkably consistent. In contrast, ConCast grids display varied grain structures, highlighting the superior uniformity achieved with Wirtz’s innovative casting techniques. 

Innovative Design and Functionality 

The Gravity FlowCaster employs a patented design that leverages nearly a century of mold cavity design and tool engineering expertise. It features a continuous rotating mold system, ensuring that molten lead or lead alloy fills the mold efficiently and solidifies uniformly. The solidified lead grid emerges seamlessly from the mold cavity, ready to be wound onto a spool, with excess material managed using standard deflash units.