Method for producing raised structures on surface of pencil

Abstract

Plastic / wooden shafts (1) have a trigonal profiled shape and, on their surface, have rows of gripping pimples (2) applied by a device with a nozzle / jet for applying a plastic preparation hardened by photo-initiator radiation and including acrylate-#oligomers, selected from a group of aromatic and aliphatic epoxy-acrylates, polyester-, polyurethane-, oligoether-, amino-#modified oligoether- and polyol-acrylates.

Description

technical field [0001] The invention relates to a method for producing raised structures on the surface of a pen (Stift). The so-called pens are understood here to be writing pens, paint brushes, cosmetic brushes or the like. These pens have a shaft made of wood or plastic. In order to improve the handling of the pen, in particular the grip of the pen during its use, raised structures of gripping material are applied to the surface of the pen or the surface of the shaft. In this case, the material is flowable in the initial state and solidifies after application. Especially when producing a pattern composed of a plurality of relatively small structures, such as a nub pattern, it is required that all structures have exactly the same shape, height and contour in order to achieve a neat appearance. In order to ensure this, a material is required which, after application to the pen surface, has only a slight tendency to run and sets as quickly as possible. Therefore, the reque...

AI Technical Summary

Problems solved by technology

In addition, the surface of the pen is partially unclean and the nozzle is contaminated by the attached silk parts.

It has also been shown that the applied material droplets exhibit a strong tendency to run, which in particular leads to an irregular and untidy appearance of the applied nub pattern

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