Tension Laminate To Form Cylinder

Provide adequate and uniform nip roll pressure.

Tension laminate to form cylinder.

Try feeding the pouch slowly to avoid the problem. Silvering is when bubbles are formed under the laminate because of lack of heat lack of tension or both. If you don t let your machine warm up to the proper temperature it might form cool spots. It is important to fiquantifyfl tension by measuring it so that it can be understood controlled and repeated from one job to the next.

Oo 1 0 fo oz 1 0 fz 6 where oo and oz are the nominal hoop and axial stresses in the tubular specimens and fo and fz are the laminate strengths in uniaxial tension. α ij i j 1 2 6 entries of inverse of laminate stiffness matrix relating to membrane. The average stresses in a given ply are used to calculate first ply failure and then subsequent ply failure leading to laminate failure. The analysis of laminates by the use of a ply by ply model is presented in section 4 3 and 4 4.

Use multiplier 7 57 shown on same line. The word tension comes from a latin word meaning to stretch not coincidentally the flexible cords that carry muscle forces to other parts of the body are called tendons. Ply level stresses are the commonly used approach to laminate strength. Provide good roll wrap i e 180 web tension and steering for a wrinkle free laminate.

Increase the feed spool s tension one of the reasons for bubbling is inadequate tension between the paper and the pouch leading to air getting trapped. Ratio a b 15 2 7 50. Tension is the fipullfl in the web or the force that is pulling the web through the machine. One cylinder will tension both legs of the cable.

Always laminate to exclude air entrapment. Don t force the pouch some people push the pouch through the laminator to try and laminate faster but this can cause bubbling. Enter left column of chart and find ratio 7 50. In sizing a cylinder to tension the above cable do not add tension in both legs.

A common issue in laminating that leads to bubbles may be silvering. Any flexible connector such as a. Solve for tension in longer leg. X t x c.

One of the laminate coordinates. Silvering and lack of tension. Tension can be measured by a variety of methods and it can be stated in pounds of force tension. A tension is a force along the length of a medium especially a force carried by a flexible medium such as a rope or cable.

To create a consistent laminated product you want constant tension or strain. Laminate failure criteria the maximum stress criterion of failure for a composite laminate subjected to in plane biaxial stresses is. Tension 7 57 x 3 000 lbs. Ply tension and compression strengths parallel to the fibers.

One of the laminate coordinates. Allow minimum adhesive dwell time of 15 30 minutes before liner removal 24 hours is preferable. Ply tension and compression strengths perpendicular to the fibers. Y t y c.