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Induction sealing device and corresponding method for producing packages of pourable food product.

A technology for sealing equipment and food, applied in packaging sealing/fastening, packaging, transportation packaging, etc., can solve problems such as reducing power transmission

Active Publication Date: 2006-05-03
TETRA LAVAL HLDG & FINANCE SA
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0014] Therefore, the power transfer to this inductor is reduced because changing operating conditions will cause changes in the electrical load, significantly away from optimal phase conditions.

Method used

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  • Induction sealing device and corresponding method for producing packages of pourable food product.
  • Induction sealing device and corresponding method for producing packages of pourable food product.
  • Induction sealing device and corresponding method for producing packages of pourable food product.

Examples

Experimental program
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Effect test

Embodiment Construction

[0022] figure 1 Reference numeral 1 in represents an integral part of the induction sealing apparatus for producing a pourable food product package.

[0023] More specifically, the sealing device 1 includes: a generator 3 for generating an alternating power signal S(ω); an inductor 4 for receiving the alternating power signal S(ω); and a matching circuit 7 for To optimize the power transfer between generator 3 and inductor 4.

[0024] More specifically, the generator 3 can produce a variable voltage (such as a sinusoidal) signal of an intermediate frequency (such as 530 kilohertz) in a conventional manner, and its peak voltage is around several hundred volts (such as 540 volts), and can generate continuous A pulsed or pulsed alternating power signal S(ω) and provides maximum power (eg 2500 watts) when the phase angle between current and voltage (both measured at the output of the generator 3) is close to zero.

[0025] The inductor 4 is defined by the winding 10 in a convent...

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Abstract

An induction sealing device that can be used to produce packaging for pourable foods. For this purpose, a tube of sheet packaging material (13) is transversely sealed. The packaging material includes at least one layer (12) of an induction-heatable material. The induction-heatable material is The heated material is covered by plastic material (16). The sealing device has: a generator (3) for generating an alternating power signal S(ω); an inductor (4) for receiving the alternating power signal S(ω) so as to transmit the signal to the layer (12). ) induces parasitic currents in the plastic material (16) and locally melts the plastic material (16) to form a transverse seal; and a matching circuit (7) for optimal power between the generator (3) and the inductor (4) transmission. The matching circuit (7) includes an inductive-capacitive circuit in which the capacitance of the capacitive elements (20, 24, 25, 26, 27) with variable capacitance is adjustable, so that the current-voltage phase angle can be brought close to zero.

Description

technical field [0001] The present invention relates to induction sealing apparatus and methods useful in the production of pourable food packaging. [0002] In particular, the invention may preferably (but not exclusively) be used in a form and seal unit for forming and sealing packages from tubes of sheet packaging material for continuous filling of pourable food products. Background technique [0003] It is well known that many pourable food products (such as fruit or vegetable juices, pasteurized or ultra-high temperature treated (UHT) milk, wine, etc.) are sold in packages made of sterile packaging materials. [0004] A typical example of this type of packaging is the parallelepiped-shaped packaging for pourable food products, called Tetra Brik Aseptic(R), which is produced by folding and sealing a web of laminated packaging material. [0005] Laminated packaging materials consist of multiple layers of fibrous material, such as paper, covered on both sides by a heat-se...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B29C65/02B29C65/00B65B51/22B65B57/00H03H7/40H03J5/24
CPCB29C65/3656B29C65/368B29C66/72321B29C66/849B29C66/9131B65B51/227H03H7/40H03J5/246H03J2200/10B29C66/91651B29C66/934B29C66/961B29C66/43121B29C66/1122B29C66/71B29K2023/06B29K2023/086B29C65/02B65B51/22B65B57/00B29C65/00
Inventor C·费拉里A·梅兰德里S·贾维德G·加拉沃蒂
Owner TETRA LAVAL HLDG & FINANCE SA
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