| 摘要 |
1. Device for forming a number of thin-walled objects by means of a blow-moulding process from a layer of material which is deformable when heated, comprising: -a lower mould with cavities arranged therein, wherein the shape of each of the cavities corresponds with the external shape of the objects to be formed; -means for carrying the layer of material to be moulded onto the lower mould; -supply means for supplying gas to the upper side of the lower mould; -heating means for heating the lower mould; and -mandrels movable into the cavities, wherein the lower mould is divided into at least three segments placed around each cavity, the separating planes between the segments extend substantially perpendicularly of the upper surface of the lower mould; wherein the segments are movable in substantially radial direction between a first position, in which they form the wall of the cavity enclosed by the segments, and a second position in which an object formed in the cavity can be moved out of the mould, and each of the segments is derivable for movement between the first and second position by a drive member, characterized in that movement between the first and second position is a linear movement; and each of the segments is coupled to a common drive element. 2. Device as claimed in claim 1, characterized in that the common drive element is adapted to execute a movement in a direction perpendicular to the direction of movement of the segments, and that the common drive element is connected to the four segments by means of a coupling converting the direction of movement. 3. Device as claimed in claim 2, characterized in that the coupling comprises four prismatic pins, each extending at the same angle relative to the direction of movement of the drive element, and that the segments each comprise a channel into which the pins fit and the axis of which corresponds with the axis of the pins. 4. Device as claimed in claim 3, characterized in that the linear drive elements extend in the vertical direction. 5. Device as claimed in any of the foregoing claims, characterized in that at least one plate forming part of the lower mould is arranged connecting onto the segments and that the plate is provided with guide means for guiding the segments when they execute their movement between the first position and the second position. 6. Device as claimed in claim 4, characterized in that in each of the cavities is arranged a stamp which is movable in vertical direction to eject the formed objects. 7. Device as claimed in claim 6, characterized in that the stamps are coupled for driving to the drive for the segments.
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