| 摘要 |
A moulded piece of thermoplastic elastomer material, in particular, a homopolymer with polypropylene load and rubber of extremely low hardness, usable as a label, publicity support or similar, with reduced thickness and generally flat, having a smooth face while on the opposite face presents an elevated perimeter border (subdivided or not into individual projections), and on the interior of said border a central surface portion. Lowered with respect to said border, said central portion intended to receive a corresponding ornamentation such as labelling (silkscreen marking, tampography, etc.) or laminar accessory (sticker or similar) without eliminating because of this the non-slipping properties of the piece; and a method for the production of said piece, which consists of a submarine injection moulding, without use of rollers, of cold casting, that allows the piece to be formed preventing the physical properties of the material, especially its highly anisotropic character, from resulting in structural defects that make correct application of the aforementioned surface ornamentation impossible or deteriorate it once applied, comprising the stages of: closing the injection machine press, introducing the thermoplastic material into the spindle device with the desired coloration material, heating the cylinder of the spindle device to produce the fusion of the introduced material, rotating the spindle device at a high rate and a low counter-pressure, leaving the material introduced into the press to cool, opening the press and subsequently the moulds in its interior, and actuating the ejectors, provided with rotary rollers, in combination with impeller means in the base of the imprint to sweep the pieces outside the press, and expelling the cold casting pieces. <IMAGE> |
