even if extruded tube is then joined and moulded to make an inner tube, there is a join in the tube where the ends are joined to one another. Normally the joined region is ribbed slightly; I have no idea why. Also the mould closes and leaves at least one line (seam?) around the circumference, and some flash goes into that.
The tube is slightly more likely to fail along this line because it is a stress concentration, and the rubber flows differently in this vicinity too. Even a tiny nick in a piece of rubber can be enough to cause it to fail when stretched, and the flash line can sometimes be enough to cause the same sort of thing.
cheers
Comedy Inner Tubes
Re: Comedy Inner Tubes
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~~~~~~~~~~~~~~~~~~~~~~Brucey~~~~~~~~~~~~~~~~~~~~~~~~
~~~~~~~~~~~~~~~~~~~~~~Brucey~~~~~~~~~~~~~~~~~~~~~~~~
Comedy Inner Tubes
If the tube is made by extruding the rubber into a tube, what is making the mold lines and mold flash? They interfere with patching.
Challenge says their latex tubes are seamless. How can you make a truly seamless tube?
Challenge says their latex tubes are seamless. How can you make a truly seamless tube?