Method and device for producing a composite material

Patent metadata

Field	Value
Publication number	US-2016193779-A1
Application number	US-201414912009-A
Country	US
Kind code	A1
Filing date	Aug 8, 2014
Priority date	Aug 16, 2013
Publication date	Jul 7, 2016
Grant date	—

Abstract

Devices and methods for producing sandwich composite materials having at least one layer of plastic disposed between at least two outer metallic covering layers may comprise providing at least two semifinished products coated with plastic on one side, activating at least one of the plastic-coated sides of the metallic covering layers directly from the side of the covering layer having the plastic-coating, and connecting the plastic-coated sides of the metallic covering layers to form the sandwich composite material. The activation of the plastic may be performed by way of a heat source that utilizes an activation medium, radiation, or plasma, for example.

First claim

1 .- 15 . (canceled)

16 . A method for producing a sandwich composite material having at least one layer of plastic disposed between at least two outer metallic covering layers, the method comprising:
providing a first metallic semifinished product having at least one side coated with plastic and a second metallic semifinished product having at least one side coated with plastic; activating the plastic-coated side of at least one of the first metallic semifinished product or the second metallic semifinished product directly from the plastic-coated side; and connecting the plastic-coated sides of the first and second metallic semifinished products after the activation to form the sandwich composite material.

17 . The method of claim 16 wherein activating the plastic-coated side of at least one of the first metallic semifinished product or the second metallic semifinished product takes place by heating directly on the plastic-coated side by action of at least one of an activation medium, radiation, or plasma.

18 . The method of claim 16 wherein activating the plastic-coated side of at least one of the first metallic semifinished product or the second metallic semifinished product comprises heating a surface of a plastic layer of the plastic-coated side to a temperature below a critical temperature so as to generate a temperature gradient in the plastic layer of the plastic-coated side that is negative in a direction of the respective at least one of the first metallic semifinished product or the second metallic semifinished product.

19 . The method of claim 18 wherein the critical temperature is at least one of a melting temperature or a glass transition temperature of the plastic layer of the plastic-coated side.

20 . The method of claim 16 wherein activating the plastic-coated side of at least one of the first metallic semifinished product or the second metallic semifinished product comprises applying heat in a radiative manner by at least one of a laser, an LED, a microwave radiation source, or an infrared radiation source.

21 . The method of claim 16 further comprising connecting at least one plastic layer to each of the first and second metallic semifinished products, wherein the at least one plastic layer of each of the first and second metallic semifinished products comprises polyamide, polyethylene, or a blend or polyamide and polyethylene.

22 . The method of claim 16 wherein providing the first and second metallic semifinished products comprises unwinding the first metallic semifinished product from a first coil and unwinding the second metallic semifinished product from a second coil, wherein connecting the plastic-coated sides of the first and second metallic semifinished products occurs in a continuous manner.

23 . The method of claim 16 wherein each of the first and second metallic semifinished products is a semifinished product with a metallic covering layer comprised of steel and having a thickness of between 0.1 to 0.5 mm.

24 . The method of claim 16 wherein the plastic-coated side of each of the first and second metallic semifinished products comprises a plastic layer with a thickness of between 0.1 to 0.8 mm before the connection.

25 . The method of claim 16 wherein each of the first and second metallic semifinished products comprises at least one adhesion-promoting layer disposed between a plastic layer and metal.

26 . The method of claim 16 wherein connecting the plastic-coated sides of the first and second metallic semifinished products comprises using a roller arrangement having at least one pair of rollers with a rolling gap in which the plastic-coated sides of the first and second metallic semifinished products are connected.

27 . The method of claim 16 wherein connecting the plastic-coated sides of the first and second metallic semifinished products comprises using a twin-belt press.

28 . An apparatus for producing a sandwich composite material having at least two metallic covering layers and at least one layer of plastic disposed between the at least two metallic covering layers, the apparatus comprising:
a first unwinding wheel for a first strip-like semifinished product having a metallic strip coated with at least one plastic layer on one side; a second unwinding wheel for a second strip-like semifinished product having a metallic strip coated with at least one plastic layer on one side; a pair of rollers or a twin-belt press for continuously connecting the sides of the first and second strip-like semifinished products having the at least one plastic layers; and a heat source for activating the at least one plastic layer of at least one of the first or second strip-like semifinished products directly from the side on which the at least one plastic layer is disposed, wherein the heat source activates the at least one plastic layer of at least one of the first or second strip-like semifinished products by action of at least one of an activation medium, radiation, or plasma.

29 . The apparatus of claim 28 wherein the heat source directly precedes the pair of rollers or the twin-belt press used to connect the first and second strip-like semifinished products.

30 . The apparatus of claim 28 further comprising at least one of a winding-up reel for rolling up the sandwich composite material or a mechanism for cutting blanks of the sandwich composite material.

31 . An apparatus for producing a sandwich composite material having at least two metallic covering layers and at least one layer of plastic disposed between the at least two metallic covering layers, the apparatus comprising:
a first axle for receiving a first strip-like semifinished product having a metallic strip coated with at least one plastic layer on one side; a second axle for receiving a second strip-like semifinished product having a metallic strip coated with at least one plastic layer on one side; a twin-belt press for continuously connecting the sides of the first and second strip-like semifinished products having the at least one plastic layers; and a heat source for activating the at least one plastic layer of at least one of the first or second strip-like semifinished products directly from the side on which the at least one plastic layer is disposed, wherein the heat source activates the at least one plastic layer of at least one of the first or second strip-like semifinished products by action of at least one of an activation medium, radiation, or plasma.

32 . The apparatus of claim 31 wherein the heat source directly precedes the pair of rollers or the twin-belt press used to connect the first and second strip-like semifinished products.

33 . The apparatus of claim 31 further comprising at least one of a winding-up reel for rolling up the sandwich composite material or a mechanism for cutting blanks of the sandwich composite material.

Assignees

• Thyssenkrupp Steel Europe Ag

Inventors

• Patberg Lothar
• Koch Klaus-Peter

Classifications

• B32B2309/105

  Thickness · CPC title

• B32B37/06

  characterised by the heating method · CPC title

• B29C65/1412

  Infrared [IR] radiation · CPC title

• B32B2270/00

  Resin or rubber layer containing a blend of at least two different polymers · CPC title

• B32B15/085

  comprising polyolefins · CPC title