Unit for heating plastic preforms, comprising a device for protecting preform necks

    公开(公告)号:US12036719B2

    公开(公告)日:2024-07-16

    申请号:US17787503

    申请日:2020-12-18

    CPC classification number: B29C49/6445 B29C49/684

    Abstract: A heating unit for heating preforms made of plastics material and having a flange separating a body and neck. The heating unit comprising a plurality of supports, each bearing a gripping member for gripping the preforms. The supports are movable in the heating unit such that each gripping member moves along a conveying path of the preforms. The heating unit also comprises a plurality of shells secured to the supports, where each shell is connected to one or more supports by an actuating member. The actuating member is mounted on said support to pivot about an axis situated at a distance from the conveying path of the preforms. The heating unit further comprising means for pivoting the actuating member to drive the shell from an open position to a protection position when the support to which said shell is connected is passing from an admission/releasing zone to a holding zone.

    Method for positioning heat-screening ramps in a preform heating station

    公开(公告)号:US11285653B2

    公开(公告)日:2022-03-29

    申请号:US17048493

    申请日:2019-04-04

    Abstract: The invention proposes a method for positioning protective screening ramps of a station for heating preforms, on the occasion of a change of format, the heating station comprising: —members for transporting preforms; —at least one pair of parallel longitudinal screening ramps for protecting necks against heat, which ramps are parted in order to leave a slot through which the preforms progress; —a motorized device for moving the ramps transversely. The method includes a preliminary calibration step which consists in arranging at least two calibration elements between the two protective screening ramps occupying an initial position, and manually causing the protective screening ramps to move into a calibrated position in which they are each in simultaneous contact with the two calibration elements.

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