VERFAHREN UND VORRICHTUNG ZUM HEIßVERSIEGELN VON MEHREREN LAGEN EINES LAMINATS
    1.
    发明公开
    VERFAHREN UND VORRICHTUNG ZUM HEIßVERSIEGELN VON MEHREREN LAGEN EINES LAMINATS 审中-公开
    VERFAHREN UND VORRICHTUNG ZUMHEIßVERSIEGELNVON MEHREREN LAGEN EINES LAMINATS

    公开(公告)号:EP3145696A1

    公开(公告)日:2017-03-29

    申请号:EP15725540.7

    申请日:2015-05-13

    申请人: Elopak AS

    IPC分类号: B29C65/04 B65B51/22

    摘要: The invention relates to a method and a device for hot sealing multiple plies of a laminate from which, in particular, gable top packaging for holding liquid foodstuffs can be produced, wherein the laminate comprises a carrier layer made of electrically non-conductive material, for example cardboard, and a sealing layer made of thermoplastic material, for example polyethylene, on at least one surface of the laminate. Hot sealing in the high-frequency alternating electric field is problematic when the number of plies of the laminate in the sealing region varies. In order to provide a method and a device for hot sealing multiple plies of a laminate in a high-frequency alternating electric field, in which problems due to an excessively great or excessively low introduction of heat into the plies of the laminate that are to be sealed are avoided, it is proposed according to the invention that the alternating electric field is generated by a first lead of the HF voltage supply in a first sub-region (71) of the sealing region (70) and is generated by a second lead of the HF voltage supply, differing from the first lead, in at least a second sub-region (72) of the sealing region (70), so that a different heat distribution is obtained over the sub-regions (71, 72) of the sealing region (70). The different heat distribution in the sub-regions (71, 72) enables a targeted adaptation to the heat requirement demanded in the respective sub-regions (71, 72).

    摘要翻译: 本发明涉及一种用于热密封层压材料的多层的方法和设备,特别是可以制造用于容纳液体食品的山墙顶部包装,其中层压材料包括由不导电材料制成的载体层,用于 例如硬纸板,以及在层压板的至少一个表面上由热塑性材料例如聚乙烯制成的密封层。 当密封区域中层压体的层数变化时,高频交变电场中的热封是有问题的。 为了提供一种用于在高频交变电场中对多层叠片进行热密封的方法和装置,其中由于过高或过低的热量引入层叠体的叠层 根据本发明提出,交变电场由密封区域(70)的第一子区域(71)中的HF电压源的第一引线产生并且由第二引线 在所述密封区域(70)的至少第二子区域(72)中与所述第一引线不同的所述HF电压源的所述第二区域(71,72)之间的热量分布不同, 密封区域(70)。 子区域(71,72)中的不同热量分布使得能够有针对性地适应各个子区域(71,72)中所需的热需求。