Method for cold-cutting a lamp

摘要

A method is described for cold-cutting a lamp having an inner pressure that is lower than the atmospheric pressure and containing a pollutant. The method includes keeping the lamp in position; cutting the lamp at at least one cutting point; prior to cutting, submerging the cutting point in a liquid or pasty composition; keeping the cutting point submerged during the cutting; and suctioning part of the composition into each cut-off portion. The composition is a dilatant and has a temperature no lower than the pour point thereof, prior to the cutting step. After the cutting, the temperature of the dilatant composition is reduced to a temperature lower than the pour point thereof, such as to increase the viscosity thereof and create a sealed stopper.

主权项

1. A method for cold-cutting a lamp that has an inner pressure lower than atmospheric pressure, an envelope, at least one connector secured to the envelope, and contains a pollutant, the method comprising:
maintaining the lamp in a predetermined cutting position; cutting the envelope into at least one cut point and creating a first piece and a second piece on either side of each cut point; prior to the cutting step, immersing the cut point in a liquid or pasty composition; maintaining the cut point immersed in the liquid or pasty composition during the cutting step; suctioning part of the liquid or pasty composition in each piece wherein the liquid or pasty composition is a shear-thickening composition and a temperature of the shear-thickening composition, prior to cutting, is higher than or equal to a pour point of the shear-thickening composition; and subsequent to the cutting step, decreasing the temperature of the shear-thickening composition to a temperature lower than the pour point, so as to increase its viscosity and to create a sealed stopper to the pollutant.