cap sample and mould
A mould for fabricating a moulded product comprising a laminate of a thermoplastic surface material and a structural material. The mould comprises a closed, air impervious first mould surface for shaping the surface material and an air permeable liner which is located in relation to the mould. The liner is adapted such that upon applying a cap mould vacuum pressure to the liner, the surface material contacts the second mould surface and conforms to the shape of the mould.
A method of fabricating a moulded product comprising: a) locating a thermoplastic surface material in relation to a mould, b) heating the surface material to a temperature sufficient to conform the surface material to the mould, c) drawing a cap mould vacuum pressure to conform the surface material to the mould, d) locating a structural material in relation to the surface material in a moulding relationship to bond the structural material with the surface material to form a laminate, and e) processing the laminate to form the moulded product, characterised by the mould comprising a closed, air impervious first mould surface for shaping the surface material, the method further comprising, f) providing the thermoplastic layer with a textured surface in relation to the first mould surface which provides an air extraction path between the first mould surface and the thermoplastic surface material, and g) drawing the in-mould vacuum pressure by applying the vacuum pressure to the extraction path.
n another embodiment, the cap mould vacuum pressure to the air permeable liner is higher (i.e. a lower absolute pressure) than the moulding pressure as applied to the laminate (i.e. higher absolute pressure). This is essential because if the vacuum pressure applied to the liner is lower than the pressure which is applied to the laminate, the surface material is not maintained in contact with the liner. While the structural laminate is curing, the cap mould vacuum pressure must therefore be higher or equal to the moulding vacuum pressure.
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cap mould
Prior art tamperproof bottle cap mould moulded in one piece from plastics material include a ring having on the inside a bead for attachment to the neck of the bottle to be cap mouldped, a stopper joined by a hinge to said ring at one point on the perimeter of the cap mould and a tamperproof strip joining the stopper to the ring over the remainder of the perimeter of the cap mould until this strip is torn off when the bottle is opened for the first time.
A capping machine for cap mould having a screw-threaded neck portion with a correspondingly screw-threaded cap. The machine comprises retaining means for retaining such a container in a retaining position and a rotary chuck for holding such a cap above the capping position, forward and reverse rotary drive means coupled to the chuck for rotating such a cap in both a clockwise sense and an anticlockwise sense,
As mentioned earlier it is most appropriate to injection- mould the cap mould in polyethylene material, which material unfortunately has, relatively speaking, poor gas barrier properties, and an injection- moulded polyethylene cap of the type shown in FIG. 1 causes large gas losses, especially along the thin, tearable portion 19, if the cap is not provided with any gastight cover disc 13.
The invention concerns a closure comprising a base portion and a cap mould forming portion including a top articulated to a ring through a hinge. The strap enables the cap mould forming portion to be moulded in closing position of the top, tamperproof means being provided between the ring and the top.
wherein the one cap mould part has a cylindrical inner surface partly bounding the mould cavity and the other mould part has a cylindrical outer surface, which cylindrical surfaces can slide over each other, wherein at least one of these surfaces can form part of an optionally resilient venting ring,
A cap mould for forming by injection molding a closure cap including an end panel and a cylindrical body, said cylindrical body having a free end and an integral interrupted internalthread about a major portion of said body; said mold comprising a core for defining internal surfaces of the closure cap and including thread forming means for forming said integral thread, said core having an end and a circumferential portion free ofthread forming means defining an interruption of the thread formin
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