Method of producing an insulation product and a product obtained by said method

Patent metadata

Field	Value
Publication number	US-10501931-B2
Application number	US-201616062328-A
Country	US
Kind code	B2
Filing date	Dec 7, 2016
Priority date	Dec 17, 2015
Publication date	Dec 10, 2019
Grant date	Dec 10, 2019

Abstract

The present invention concerns a method of producing an insulation product comprising a board of porous insulation material wrapped in a gas-impermeable foil, said method comprising the steps of providing a succession of porous insulation material boards on a first conveyor apparatus and feeding the boards on a second conveyor apparatus; providing wrapping foil and wrapping said foil to form a tube around the boards on said second conveyor apparatus, flushing the boards with an insulating gas, and sealing the wrapping foil at the ends of each board transverse to the direction of travel of the second conveyor apparatus.

First claim

The invention claimed is:

1. A method of producing an insulation product comprising a board of porous insulation material wrapped in a gas-impermeable foil, the method comprising the steps of:
providing a succession of porous insulation material boards on a first conveyor apparatus and feeding the boards on a second conveyor apparatus;
providing wrapping foil and a flow-wrapping apparatus on the second conveyor apparatus, and wrapping the wrapping foil to form a tubular wrapping foil with a tubular configuration around the boards on the flow-wrapping apparatus on the second conveyor apparatus;
flushing the boards with an insulating gas; and then
sealing the wrapping foil at a front end and a rear end of each board transverse to a direction of travel of the second conveyor apparatus.

2. The method according to claim 1 , further comprising pre-compressing the porous insulation material on the first conveyor apparatus, the pre-compressing being within a range of 5-20% of a nominal thickness of the porous insulation material.

3. The method according to claim 2 , wherein the pre-compression is maintained until the step of sealing of the wrapping foil at the front end and the rear end of the board has been performed.

4. The method according to claim 1 , further comprising pre-heating the porous insulation material on the first conveyor apparatus.

5. The method according to claim 1 , further comprising preheating the insulating gas to obtain a pre-heated insulating gas prior to flushing an interior of the tubular wrapping foil with the pre-heated insulating gas.

6. The method according to claim 5 , wherein the step of flushing further comprise flushing the interior of the tubular wrapping foil and the boards with the insulating gas.

7. The method according to claim 6 , wherein the step of flushing substitutes between 80-98% of an air inside the tubular wrapping foil and the boards with the insulating gas.

8. The method according to claim 5 , further comprising selecting the insulating gas from the group consisting of Carbondioxide (CO 2 ), Argon or other gases having thermal conductivity lower than air.

9. The method according to claim 1 , wherein the wrapping foil is a multilayer plastic foil, and the step of forming the tubular wrapping foil further comprises longitudinal welding of the wrapping foil.

Assignees

• Rockwool Int

Inventors

• Rahbek Jens Eg

Classifications

• B29D99/001 Primary

  Producing wall or panel-like structures, e.g. for hulls, fuselages, or buildings (articles with hollow walls B29D24/00) · CPC title

• F25D2201/14

  using subatmospheric pressure · CPC title

• F25D2201/128

  of foil type · CPC title

• F25D2201/124

  of fibrous type · CPC title

• F16L59/04

  Arrangements using dry fillers, e.g. using slag wool · CPC title