METHOD AND SYSTEM FOR MANUFACTURING A TYRE TREAD WITH LUGS

摘要

A method and system for manufacturing a tyre tread with lugs, the tread having a tread base, and a number of lugs projecting upwards from the tread base; the method having the steps of: preparing a green-rubber blank tread of constant thickness; applying rubber blocks to the areas of the blank tread where the lugs are to be formed, each block varying lengthwise in cross section, so it is thinner at the centre and thicker at the side; and curing the blank tread, together with the blocks, in a curing mold negatively reproducing the pattern of the tread.

主权项

1. A method of manufacturing a tyre tread with lugs, the tread comprising a tread base; and a number of lugs, each of which projects upwards from the tread base, and has a lateral portion located at a shoulder of the tyre, and a centre portion located in the centre area of the tyre; the method comprising the steps of:
preparing a green-rubber blank tread; applying rubber blocks to the areas of the blank tread where the lugs are to be formed, each block having an outer wall located at a shoulder of the blank tread, and an inner wall opposite the outer wall and located in the centre area of the blank tread; and curing the blank tread, together with the blocks, in a curing mold negatively reproducing the pattern of the tread; wherein each block varies lengthwise in cross section, so it is thinner at the inner wall and thicker at the outer wall.