Method and device for manufacturing an acoustic absorbent panel

Patent metadata

Field	Value
Publication number	US-9446458-B2
Application number	US-201113817346-A
Country	US
Kind code	B2
Filing date	Sep 6, 2011
Priority date	Sep 14, 2010
Publication date	Sep 20, 2016
Grant date	Sep 20, 2016

Abstract

The invention relates to a method for manufacturing an acoustic absorbent panel, comprising the following steps:
provision of a sheet of plastic material, formation of a plurality of through-slots in the sheet by milling using at least one milling tool.

The invention makes it possible to manufacture an acoustic absorbent panel quickly and inexpensively.

First claim

The invention claimed is:

1. A method for manufacturing an acoustic absorbent panel, the method comprising:
milling, with a milling tool, a plurality of through-slots in a sheet comprising a plastic material,

wherein
the plastic material comprises at least one of a linear thermoplastic polyester, polyethylene terephthalate (PET), polycarbonate (PC) and polymethyl methacrylate (PMMA),
the plurality of through-slots have a width between 0.2 and 0.4 mm, and
the percentage surface area of the through-slots relative to the total surface area of the panel is from 1.5 to 5%,
and wherein, during the milling, the sheet is positioned such that the milling tool faces a first point on the sheet, to form a first slot; and then,
the sheet is moved away from the milling tool and repositioned such that the milling tool faces at least one second point on the sheet, to form at least one second slot.

2. The method of claim 1 , wherein the milling is carried out with a plurality of milling tools.

3. The method of claim 1 , wherein, during the milling, the milling tool is sprayed with water, thereby cooling and cleaning the milling tool.

4. The method of claim 1 , wherein the slots are formed parallel to one another, on one and the same line or staggered.

5. The method of claim 1 , wherein a plurality of slots are formed parallel to a first direction, then a plurality of slots are formed parallel to a second direction, which is different from the first direction.

6. The method of claim 1 , further comprising, before the milling:
decorating the sheet with a water-resistant ink, paint, or varnish; then/or
coating the sheet with a scratch-proof varnish.

7. The method of claim 1 , wherein the plastic material comprises a linear thermoplastic polyester.

8. The method of claim 1 , wherein the plastic material comprises a polyethylene terephthalate (PET).

9. The method of claim 1 , wherein the plastic material comprises a polycarbonate (PC).

10. The method of claim 1 , wherein the plastic material comprises a polymethyl methacrylate (PMMA).

11. The method of claim 1 , wherein the plastic material comprises a polyethylene terephthalate glycol.

12. The method of claim 1 , wherein the sheet has a thickness of between 4 and 5 mm.

Assignees

• Huchet Gerard
• Saint Gobain

Inventors

• Huchet Gerard

Classifications

• E04B2001/8245

  Machines for manufacturing, shaping, piercing or filling sound insulating elements · CPC title

• Y10T409/303752

  Process · CPC title

• B23C3/13 Primary

  Surface milling of plates, sheets or strips · CPC title

• E04B9/0464

  having irregularities on the faces, e.g. holes, grooves · CPC title

• E04B2001/849

  Groove or slot type openings · CPC title