Method for producing plate packs
Plate packs are produced from a sheet-like starting product ( 1 ), which is cut to form plates, which are stacked to form a plate pack. The plates within the plate stack are joined to one another by a bonding agent. The bonding agent used is a cyanoacrylate adhesive with a high temperature stability rating. It is applied to a wetting layer ( 14 ) for the adhesive. The wetting layer ( 14 ) is formulated to a pH in a region >7. The cyanoacrylate adhesive with a high temperature stability rating is able to spread on the wetting layer ( 14 ) such that effective wetting takes place, thus achieving quick and secure joining of the plates to one another.
1. A method for producing lamination packs, the method comprising:
punching laminations from a flat starting product;
stacking the laminations to a lamination stack;
connecting the laminations in the lamination stack to each other by a high temperature-resistant cyanoacrylate adhesive applied to a wetting layer provided on the laminations and adjusted to a pH value in a range >7, wherein the high temperature-resistant cyanoacrylate adhesive has a high temperature resistance of at least 130° C.
2. The method according to claim 1 , further comprising preparing the wetting layer from dipropylene glycol, distilled and/or demineralized and/or deionized water, and, optionally, at least one additive.
3. The method according to claim 2 , further comprising selecting the at least one additive from the group consisting of diamond; polyglycol oil; corrosion protection additives; and alkaline additives; and combinations thereof.
4. The method according to claim 2 , further comprising preparing the wetting layer to contain between approximately 30% to approximately 75% by weight distilled and/or demineralized and/or deionized water and approximately 25% to approximately 70% by weight dipropylene glycol.
5. The method according to claim 2 , further comprising selecting a proportion of the at least one additive to be between 0% and approximately 20% by weight of the wetting layer.
6. The method according to claim 1 , further comprising spraying the wetting layer onto the starting product.
7. The method according to claim 1 , further comprising brushing the wetting layer onto the starting product.
8. The method according to claim 1 , further comprising applying the wetting layer by polishing the wetting layer onto the starting product.
9. The method according to claim 1 , further comprising applying the wetting layer onto an entire surface of the starting product.
10. The method according to claim 1 , further comprising applying the wetting layer onto a first face of the starting product and a second face of the starting product.
11. The method according to claim 1 , further comprising applying the wetting layer in an advancing direction of the starting product upstream of a punching device onto the starting product.
12. The method according to claim 1 , further comprising applying the wetting layer by at least one application unit, provided at a punching tool, onto the starting product.
13. The method according to claim 1 , further comprising providing an application unit for the high temperature-resistant cyanoacrylate adhesive at a punching tool.
14. The method according to claim 1 , further comprising applying the high temperature-resistant cyanoacrylate adhesive and the wetting layer onto the starting product immediately prior to punching.
15. The method according to claim 1 , further comprising applying the high temperature-resistant cyanoacrylate adhesive and the wetting layer onto the laminations immediately after punching.
16. The method according to claim 1 , further comprising providing the starting product as a strip-shaped starting product and applying the wetting layer onto the strip-shaped starting product, in an advancing direction of the strip-shaped starting product, after coating the strip-shaped starting product and prior to winding the strip-shaped starting product onto a coiler.
17. The method according to claim 1 , further comprising providing the starting product as a strip-shaped starting product and applying the wetting layer onto the strip-shaped starting product, in an advancing direction of the starting product, prior to splitting the strip-shaped starting product.