Laserfiche WebLink
<br />B. A slight amount of "squeeze-out" or "flashing" is a good indicator that the <br />proper temperatures were achieved. It signifies a proper seam in that some <br />of the melted polymer was laterally extruded out of the seam zone. The <br />pressure should be decreased until only a minimal amount of hot melt is <br />squeezing out. <br />C. For Fv[Ls of 40 mil thickness and less, a long low wavelength pattern in <br />one direction of the seam on its top surface is indicative of a proper weld. <br />If the wave peaks become too close together, the machine speed should be <br />increased until a satisfactory pattern is present. The absence of this <br />wavelength pattern indicates that the machine speed should be decreased. <br />FvILs of 40 mil in thickness and less require considerable visual <br />inspection. There will be no wavy pattern for FIvfLs greater than 40 mil in <br />thickness and less require considerable visual inspection. There will be no <br />wavy pattern for FMLs greater than 40 mil in thickness due to the inherent <br />stiffness of the thicker material. <br />D. \rip/drive roller marks will always show on the surface. Their depth, <br />however, should be visually observable, butjust barely evident to the <br />touch. <br />E. The hot wedge device has only a few adjustments that can be made, but is <br />very important that they be checked daily. Cleaning of machine should be <br />done daily. <br />50 <br />