Common factors for leaking ballpoints are high temperatures, incorrect storing or positioning of the pen, capillary action, changes in air pressure, damage to the pen’s tip, or manufacturer’s defects. Leaking can be prevented by ensuring that the …

A crystallographic defect is an interruption of the regular patterns of arrangement of atoms or molecules in crystalline solids. The positions and orientations of particles, which are repeating at fixed distances determined by the unit cell parameters in crystals, exhibit a periodic crystal structure , but this is usually imperfect.

In the present paper the study is focused on prevention of defects arising due to the process parameters which are often encountered in the manufacturing of ball point pen. The major process parameters which are analyzed are clamping tonnage, cooling time, pressure drop and heat transfer rate.

Mar 20, 2023 · Injection moulding defects and their causes can help prevent by changing the part design, mould, material and processing parameters

Sep 30, 2019 · product defects, the producers are faced with certain difficulties to prevent them appearing in the injection molded parts. The objective of this paper is to study the prevention of defects in injection molding process experimentally by …

A point defect in a crystal is (i) the occupancy of a lattice sites by impurity atoms/ions or a voids (i.e. vacancy); or (ii) extra atoms/ions not in regular lattice positions.

Sep 3, 2019 · The paper suggests preventive actions for the defects like flash, burn marks, short shot, shrinkage, weld line, warpage and sink mark. The preventive actions were successfully implemented in manufacturing the ball point pen.

Ballpoint: The ball at the pen’s tip might be defective or not properly fitted. Cap: The cap might not fit properly or might be missing. Barrel: The pen’s barrel could have cracks, imperfections, or incorrect labeling.

There are two leading causes of ballpoint pen blotting: warming of the ink that results in it becoming less viscous and flowing more quickly, and mechanical damage to the rollerball mechanism at the tip of the pen that results in ink leaking out around the ball.

Point defects involve irregularities associated with individual atoms or small groups of atoms within the crystal lattice. These defects can occur due to missing atoms (vacancies), additional atoms occupying interstitial sites, or substitutions of atoms from their regular positions.