Abstract: An injection mould comprises first and second relatively movable mould halves defining at least one mould cavity between them, a first of the halves having a sprue through which moulding material is injected, a runner leading from the sprue to at least one gate into the or each mould cavity.

Abstract: An injection mould comprises first and second relatively movable mould halves defining at least one mould cavity between them, a first of the halves having a sprue through which moulding material is injected, a runner leading from the sprue to at least one gate into the or each mould cavity.

Abstract: A wall plug 30 is provided with a longitudinal recess 34 along at least one side thereof for receipt therealong of the flexible tape portion of a cable tie. An anchor is provided for securing a flexible cable tie to a hollow wall, the cable tie 3 having a head portion 18 containing a locking mechanism 20 and a flexible tape portion, for example provided with teeth 3a. The anchor comprises an elongate body 4 having a transverse aperture 11 therethrough at or adjacent to the mid-point of the length thereof, a first recess 14 extending along the body from the aperture to one end thereof, a second recess 12 extending along the opposite side of the body to the first recess from the aperture 11 towards the opposite end thereof and a slot 16 through said opposite end thereof communicating with the second recess.

Abstract: The method of moulding plastics articles comprises propelling a solid plastics feed material by screw feed means (10) through a melting zone, the screw feed means (10) propelling the resultant molten plastics material to shaping means, shaping the molten plastics material in the shaping means and allowing the material to solidify to retain the shape, and is characterised by varying the composition of the plastics material cyclically before or along the length of the screw feed means (10) so that the molten material (1,2) emerging from the screw feed means (10) varies in composition with time, whereby at least one part of each moulded article (50) is of different composition from the remainder of the article (50).