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Driving device structure of supersonic seal device

A sealing device and driving device technology, applied in packaging sealing/fastening, packaging, transportation packaging, etc., can solve the problems of piezoelectric ceramic sheets, and achieve the effect of reducing bending stress and reducing requirements

Inactive Publication Date: 2002-11-06
TETRA LAVAL HLDG & FINANCE SA
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Since it is difficult to manufacture many piezoceramics with the same characteristics, the vibration generated by each driving device may be slightly different

Method used

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  • Driving device structure of supersonic seal device
  • Driving device structure of supersonic seal device
  • Driving device structure of supersonic seal device

Examples

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Embodiment Construction

[0014] The structure according to the invention for the ultrasonic seal 1 shown in FIG. 1 or a similar seal 1 has been specially developed and produced 3 . The sealing device 1 essentially consists of a drive device 2 and a homogeneous body 13 .

[0015] The driving device 2 of the sealing device 1 includes several piezoelectric ceramic sheets 3, and several conductive metal sheets 4 are arranged in the middle of the ceramic sheets. These metal pieces 4 are connected to an AC power source (not shown) in order to electrically connect the above-mentioned piezoelectric ceramic pieces 3 in parallel. The ceramic sheet 3 and the metal sheet 4 are fixed together with a balance weight 5 through the compression screw 6 in a pre-tightened manner. The compression screw 6 is also used to secure the drive device 2 in the homogeneous body 13 of the sealing device 1 . The drive unit 2 converts the voltage into a mechanical displacement which causes vibrations constituting the sealing actio...

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Abstract

A structure for a driving device (2) of an ultrasonic sealing device (1). The driving device includes several piezoelectric ceramic sheets (3), and a conductive metal sheet (4) connected with an AC power supply is arranged among them. The driving device (2) also includes a balance weight (5) and compression screws (6). The compression screw (6) fixes the ceramic sheet (3), the metal sheet (4) and the balance weight (5) together under a certain preloaded pressure. In addition, the compression screw securely fixes the drive unit (2) in the sealing unit (1). The sealing device (1) comprises a homogeneous body (13) consisting of a reaction body (7) surrounding the drive, a joint plane (10) with a fixed edge (11) and a long and narrow sealing surface (9) horn (8) composition. The structure to which the invention relates comprises a gasket (12), the whole piece (12) arranged in such a way that a space (H ). The gasket (12) permits vibration of the ultrasonic seal (1), but prevents residual bending stresses from reaching the drive (2). The spacing dimension (H) of the spacer (12) can be selected, and the vibration amplitude of the sealing device (1) can be adjusted to a predetermined, pre-selected amplitude.

Description

technical field [0001] The present invention relates to ultrasonic sealing device and equipment for sealing thermoplastic materials, in particular to a structure for the driving device of the ultrasonic sealing device, the driving device includes several piezoelectric ceramic sheets, a balance weight and compression screws, compression A plurality of conductive metal sheets connected to an AC power supply are arranged in the middle of the electric ceramic sheet, and the ultrasonic sealing device includes a homogeneous body that is fixedly installed with a driving device. Background technique [0002] Various types of devices for sealing with ultrasound are used in industry today. Swedish patent application No. SE 9300918-1 discloses an ultrasonic sealing device which has been specially designed for use in filling machines. This machine is used to fill liquid food into individual disposable packaging. Since these filling machines leave only limited effective space for the u...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B06B1/06B65B51/16B65B51/22H01L41/08H01L41/09B29C65/08
CPCB06B1/0618B29C65/08B65B51/225B29C66/8145B29C66/81427B29C66/8167B29C66/849B29C66/9512B65B51/16
Inventor M·拉比
Owner TETRA LAVAL HLDG & FINANCE SA
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