Method is for provision of a fold zone in a plastic plate, so-called step plate, comprising at least two parallel sec tors joined to each other reciprocally by ribs and involves removal of strip from one of sectors to form a notch in plate

摘要

#CMT# #/CMT# A fold zone is formed by a notch (5) in the plastic plate (1) by the removal of a strip (7) from one of the parallel sectors (2,3) of the plate. When the notch is formed, at least a part of the ribs (4), located in the fold zone to be formed, is also removed. The notch is parallel with the longitudinal direction of the ribs, but may also be formed crossways to the longitudinal direction of the ribs. Removal of the strip occurs under the influence of heat. #CMT# : #/CMT# The notch is formed by a blade or similar provided at the outlet of equipment (8) for injection moulding the step plate. It is in a position where the step plate is still warm. The notch is V-shaped. #CMT#USE : #/CMT# For the provision of a fold zone in a plastic plate, a so-called step plate. #CMT#ADVANTAGE : #/CMT# The notch is very simple to produce and the plastic plate is easy to fold along it. #CMT#DESCRIPTION OF DRAWINGS : #/CMT# The figure illustrates the method described by the invention. 1 : plastic plate 2,3 : two parallel sectors of plate 4 : ribs 5 : notch 7 : strip 8 : outlet of injection moulding equipment #CMT#POLYMERS : #/CMT# The plate is made of plastic.