Paper elimination in the production of battery plates
View Patent ↗A method and apparatus for continuously producing pasted positive and negative electrode plates from pasted lead or lead alloy expanded, punched or cast metal mesh strip for use in lead-acid batteries without the use of paper barriers. The heating of cutting devices such as roll-mounted die-cutters to a predetermined temperature range of at least about 150° C., preferably about 160 to 300° C., and more preferably about 180 to 210° C., eliminates sticking of the paste on the pasted metal mesh strip to the cutting devices and obviates the need for the paper barriers.
1. A continuous method for cutting expanded, punched or cast continuous metal mesh strip freshly pasted with a polymer-free paste without the use of paper barriers to create paperless battery plates for use in lead acid batteries, the method comprising the steps of: providing a cutting device including a cutting roll having cutting blades mounted thereon, an index mechanism and an anvil roll opposed to said cutting roll for receiving the freshly pasted and paperless continuous metal mesh strip therebetween; and heating said cutting blades, the cutting roll, the index mechanism and the anvil roll to a temperature in the range of about 160 to 300° C. whereby the paste from the freshly pasted and paperless continuous metal mesh strip does not adhere to the heated cutting blades, the cutting roll, the index mechanism and the anvil roll during the cutting of the freshly pasted and paperless continuous metal mesh strip with said heated cutting device into discrete paperless battery plates.
2. A method as claimed in claim 1 in which the cutting blades, the cutting die roll, the index mechanism and the anvil roll are heated to a temperature in the range of about 180 to 210° C.
3. A method as claimed in claim 1 in which the cutting device is a linear reciprocating cutter.
4. A method as claimed in claim 1 in which the metal mesh strip is a lead or lead alloy expanded mesh strip.