Method for producing plate packs

• US 10,836,148 B2
• Filed: 12/01/2016
• Issued: 11/17/2020
• Est. Priority Date: 12/09/2015
• Status: Active Grant

• Current Assignee: Feintool International Holding AG (Michael Pieper, MBA)
• Original Assignee: Kienle + Spiess GmbH (Sumitomo Corporation)
• Inventors: Boker, Bjorn
• Primary Examiner(s): Osele, Mark A
• Assistant Examiner(s): Harm, Nickolas R
• Application Number:
  US15/781,137
• Publication Number:
  US 20190240965A1
• Time in Patent Office: 1,447 Days
• Field of Search: 156 90, 156250, 156256, 156261, 156263, 156264, 156297, 156288, 156289, 1563073, 156326, 156390, 156510, 156512, 156528, 156537
• CPC Class Codes: B29C 65/48 using adhesives , i.e. using supplementary joining material; solvent bonding
• CPC Class Codes: B29C 65/482 Drying adhesives, e.g. solvent based adhesives
• CPC Class Codes: B29C 65/52 characterised by the way of applying the adhesive B29C65/50 takes precedence; apparatus for applying liquids in general B05C; processes for applying liquids in general B05D
• CPC Class Codes: B29C 65/72 by combined operations or combined techniques, e.g. welding and stitching
• CPC Class Codes: B29C 65/74 by welding and severing , or by joining and severing, the severing being performed in the area to be joined, next to the area to be joined, in the joint area or next to the joint area
• CPC Class Codes: B29C 65/76 Making non-permanent or releasable joints
• CPC Class Codes: B29C 66/004 Preventing sticking together, e.g. of some areas of the parts to be joined
• CPC Class Codes: B29C 66/00461 being liquid, e.g. oil based
• CPC Class Codes: B29C 66/026 Chemical pre-treatments B29C66/028 takes precedence
• CPC Class Codes: B29C 66/028 Non-mechanical surface pre-treatments, i.e. by flame treatment, electric discharge treatment, plasma treatment, wave energy or particle radiation B29C65/14 takes precedence; non-mechanical surface treatment of plastics in general B29C59/08 - B29C59/16
• CPC Class Codes: B29C 66/41 Joining substantially flat articles B29C66/47 and subgroups take precedence; Making flat seams in tubular or hollow articles B29C66/51 and subgroups take precedence
• CPC Class Codes: B29C 66/45 Joining of substantially the whole surface of the articles methods or apparatus for laminating B32B37/00
• CPC Class Codes: B29C 66/71 characterised by the composition of the plastics material of the parts to be joined welding bar compositions B29C65/125
• CPC Class Codes: B32B 15/00 Layered products comprising a layer of metal
• CPC Class Codes: B32B 2037/1261 moisture curable
• CPC Class Codes: B32B 2307/206 Insulating
• CPC Class Codes: B32B 2457/00 Electrical equipment
• CPC Class Codes: B32B 37/1284 Application of adhesive
• CPC Class Codes: B32B 37/18 involving the assembly of discrete sheets or panels only
• CPC Class Codes: B32B 38/0004 Cutting, tearing or severing, e.g. bursting; Cutter details cutting in general B26D; laminating combined with punching or perforating B32B38/04; removing all or part of the layers B32B38/10; cutting in combination with laying up and registration B32B38/185 takes precedence
• CPC Class Codes: B32B 7/12 : using interposed adhesives or interposed materials with bonding properties
• CPC Class Codes: C09J 2400/163 : in the substrate
• CPC Class Codes: C09J 2400/166 : in the pretreated surface to be joined
• CPC Class Codes: C09J 2433/00 : Presence of (meth)acrylic polymer
• CPC Class Codes: C09J 5/02 : involving pretreatment of the surfaces to be joined
• CPC Class Codes: F16B 11/006 : by gluing gluing of plastics material B29C65/48
• CPC Class Codes: H02K 15/02 : of stator or rotor bodies

Abstract

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.

Claims

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.