| 摘要 |
<p>The present invention refers to a method for producing a plastic lid with a plastic label applied thereon, comprising the steps of: a) providing a mould for the production of a lid of plastic material using the inmoulding technique, wherein such mould comprises a hollow mould matrix provided with a peripheral border including an annular planar surface lying substantially parallel to a planar surface of the bottom of the hollow mould matrix and joining the latter via an inclined plane having an angle a situated anywhere between 0° and 50°, with a difference in level between said two surfaces lying anywhere between 0 and 4 mm, said mould matrix having also one or several rounded corners, the outside extension radius of which ranges from 10 to 100 mm; b) providing a label of cast stratified plastic material having a thickness of less than 90 µm and a planar extension such as to enable it to protrude by 0.5 to 2.0 mm from said peripheral border of said hollow mould matrix of said lid-forming mould; c) placing said label onto the bottom of said hollow mould matrix; d) holding said label in position on the bottom of said hollow mould matrix; e) closing said hollow mould matrix with a corresponding opposite mould half to thereby obtain a moulding cavity for forming a plastic lid; f) injecting a polymer in the fluid state thereof into said moulding cavity so as to fill said cavity and cause the contact surface of said label to fuse therewith in order to obtain a single integral piece, while keeping at the same time said hollow mould matrix and said opposite mould half clamped together at such temperature as to enable the injected polymer to set, i.e. solidify in the state in which it is bonded to said label.</p> |
