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Device and method for inductive sealing of a plurality of plies of a laminate

A technology for laminates, equipment, used in packaging sealing/fastening, applications, household components, etc., which can solve problems such as increased loss, non-uniform heating of sealing layers, and overheating of laminates

Active Publication Date: 2018-06-08
ELOPAK SYST
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the result is increased losses, which can lead to unacceptable heating of the inductor and possibly localized overheating of the laminate
[0005] Although the inductor follows the geometry of the area of ​​the gable box to be sealed, practice has shown that in some cases non-uniform heating of the sealing layer can still occur, resulting in a less than ideal seal of the gable box

Method used

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  • Device and method for inductive sealing of a plurality of plies of a laminate
  • Device and method for inductive sealing of a plurality of plies of a laminate
  • Device and method for inductive sealing of a plurality of plies of a laminate

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Embodiment Construction

[0036] figure 1 Shown is an apparatus (1) for induction sealing of a plurality of plies of a laminate (2) of a gable pack (6), comprising: a first sealing clip (3a) and a second sealing clip (3b); a sealing gap (4) arranged between the first and second sealing clips (3a, 3b) for accommodating a plurality of plies of the laminate (2); and a driver, not shown, The drives are used to generate a relative movement of the sealing clips (3a, 3b) relative to each other and to exert a pressing force on the plies of the laminate (2) in the sealing gap (4).

[0037] In the exemplary embodiment shown, the sealing clip (3a) is held in a fixed position, while the sealing clip (3b) can be moved back and forth in the direction of the sealing clip (3a) by means of a drive. The direction of movement (5) of the sealing clip (3a) is at right angles to the pressing surfaces of the two sealing clips (3a, 3b). For example, a cylinder unit can be regarded as a drive. Both sealing clips (3a, 3b) co...

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PUM

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Abstract

The invention relates to a device (1) for inductive sealing of a plurality of plies of a laminate (2) which comprises a carrier layer made of electrically non-conductive material, a sealing layer madeof thermoplastic material and a metal layer disposed between the sealing layer and the carrier layer. In order to avoid a non-uniform heating of the sealing layer of the laminate and therefore imperfect seals, taking into account the required short heating times and the associated high energy input per unit time, it is proposed that the block (7) of each sealing jaw (3a, 3b) consists of a metallic material, the concentrator (8) of each sealing jaw (3a, 3b) is composed of a plurality of partial pieces (8a, 8b, 8c, 8d), wherein each partial piece (8a, 8b, 8c, 8d) consists of a material suitablefor magnetic field concentration and all the partial pieces (8a, 8b, 8c, 8d) are electrically insulated from one another and with respect to the metal block (7). In addition, a method for inductive sealing is proposed which is particularly suitable for integration into a filling system for liquid foodstuffs with aseptic working area.

Description

technical field [0001] The present invention relates to apparatus and methods for the induction sealing of multiple plies of a laminate. Background technique [0002] Laminates are commonly used as packaging material for packaging boxes for liquid food, laminates comprising a carrier layer made of non-conductive material (especially paper or cardboard) and thermoplastic material (especially acrylic thermoplastic) sealing layer. Thermoplastic materials are liquid-tight and resistant to fatty substances and acids. A metal layer, in particular an aluminum layer, is arranged between the sealing layer and the carrier layer. The thermoplastic material can be heat sealed by pressing mutually facing sealing layers of the plurality of laminate plies against each other and fusing them together by applying heat. The heat is generated by induction sealing by installing at least one coil (inductor) in the sealing jaws used for pressing together the plies of the laminate, which coil in...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B29C65/36B65B51/14B65B51/22B65D5/06B29K23/00B29K705/02B29L9/00
CPCB29K2105/203B29C66/81881B29C65/3656B29C65/3668B29C65/368B29C66/0342B29C66/1122B29C66/71B29C66/72321B29C66/72328B29C66/72343B29L2031/7166B29C66/73921B29C66/8122B29C66/81811B29C66/81871B29C66/8242B29C66/8322B29C66/8432B29C66/849B29K2705/02B65B51/227B29C66/81831B29C66/43122B29K2023/06B29K2023/12B29K2879/08B29K2871/00B29K2909/04B29K2705/00B29C65/3604
Inventor 马丁·马赫
Owner ELOPAK SYST