Circuit analysis of laser perforation of metallized polymer films of screen-vacuum thermal insulation

Аuthors

Barabanov A. A.^*, Vyatlev P. A.^**, Sergeev D. V.^***, Sysoev V. K.^****

Lavochkin Research and Production Association, NPO Lavochkin, 24, Leningradskay str., Khimki, Moscow region, 141400, Russia

*e-mail: barabanov@laspace.ru
**e-mail: vyatlev@laspace.ru
***e-mail: sergeevdv@laspace.ru
****e-mail: SysoevVK@laspace.ru

Abstract

As screens of SVHI it is used the polyethylene terephthalate or polyimide film metallized with aluminum on one or both sides by the film thickness of 5-20 microns, the aluminum coating layer is 0.1 micron. Outer and inner surfaces of SVHI are sheathed by combined materials «Nyika-KPMA» or «Nyika- PAM-2» with a thickness of 150 microns.

To ensure evacuation and protection against electrostatic charges the films of SVHI are perforated by holes 2-5 mm with perforation pitch from 10 × 10 to 50 × 50 mm.

Laser perforation of SVHI films in comparison with other methods has a number of advantages: significantly increased productivity, increased accuracy of perforation. Presented method allows to quickly adjust the diameter and pitch of holes.

Jobs created by the laser system is based on the application of the principle of linear-angular scanning of the laser radiation, in which the movement is carried out by the laser beam on the surface of the material being processed. The principle of the system is realized through the use of linear angular scans, which consists of:

 - Fiber laser (YLP-1-100-20-20-RG);
 - Linear actuator LSM-P-32-265-50;
 - Optical module angular scanning.

Laser perforation system can operate in one of two modes of perforation:

 - Laser perforation is simultaneously with continuous movement of the film;
 - Laser perforation in the start — stop mode is carried out on a stationary film.

Calculations of the motion path of the laser beam in the scanning system and the estimation of the effect of errors on the accuracy of the process of perforation at various modes of perforation are carried out.

Comparing the hole-cutting mode it can be concluded that the start-stop mode provides a greater accuracy than by cutting apertures on a continuously moving film.

Keywords:

laser perforation, SVHI film, laser

References

1. Izolyatsiya teplovaya ekranno-vakuumnaya. Marki i tekhnicheskie trebovaniya. OST 92-1380-83 (Shield- vacuum thermal insulation. Stamps and technical requirements. State Standard 92-1380-83), Moscow, Standarty, 37 p.
2. Veiko Vadim, Libenson Mikhail, Chervyakov Georgii, Yakovlev Evgenii. Vzaimodeistvie lazernogo izlucheniya s veshchestvom (Interaction of laser radiation with media), Moscow, FIZMATLIT, 2008, 312p.
3. Sysoev V.K., Vyatlev P.A., Zakharchenko A.V. Opticheskii zhurnal, 2007, vol. 74, no. 2, pp.16-18.