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Hollow-cathode gas lance for the interior coating of containers

A technology of hollow cathode and internal gas, which is applied in the direction of surface coating liquid devices, coatings, electrical components, etc., to achieve the effects of improving quality and shielding effect, improving dissociation degree, and high plasma density

Inactive Publication Date: 2013-08-14
KRONES AG
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

These can also have a negative impact on the duration and efficiency of the coating process

Method used

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  • Hollow-cathode gas lance for the interior coating of containers
  • Hollow-cathode gas lance for the interior coating of containers
  • Hollow-cathode gas lance for the interior coating of containers

Examples

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Embodiment Construction

[0068] figure 1 An apparatus 100 for plasma-enhanced coating of containers 102 is shown by way of example. The device 100 may comprise two different pressure regions, eg a base pressure chamber 104 which can be evacuated to a pressure of eg 100 to 4000 Pa, and a process pressure chamber 108 which has a pressure of eg 1 to 30 Pa. A high frequency source 107 can introduce high frequencies into the gas spray gun 101 via line 105 . Line 105 may additionally be used to supply gas from gas source 107 to gas lance 101 .

[0069] The base pressure chamber 104 can comprise, eg, a U-shaped outer electrode 103 , which can at least partially enclose the container 102 to be treated without touching the container 102 , since the container 102 can be suspended, for example, by a bottle gripper 105 . The outer electrode 103 may, for example, be electrically connected to a part of the base pressure chamber housing 112 and may thus, for example, be grounded. Although not shown, it is also po...

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Abstract

The disclosure relates to an apparatus for coating a container, for instance a plastic bottle, by means of a plasma treatment, the apparatus comprising at least one high-frequency source (106), at least one outer electrode (103) located outside the container (102) to be treated, and at least one at least partially electrically conducting gas lance (101) for the supply of process gas into the container, configured to apply a high frequency of the high frequency source to the at least one outer electrode or the at least one gas lance. The gas lance is configured at least in part or in whole as a hollow cathode having at least one internal hollow space. The hollow space of the hollow cathode is fluidically connected to the interior of the container to be treated and to the part of the gas lance that supplies the process gas, for instance, by lateral (113) and / or axial bores or recesses (114). A plasma can be generated in the interior of the hollow cathode in the at least one hollow space.

Description

technical field [0001] The present invention relates to a device for coating containers, in particular to a hollow cathode gas spray gun for coating the interior of containers. Background technique [0002] In order to reduce the penetration of container walls / hollow body walls, for example with respect to undesired substances, as described, for example, in EP0881197A2, for these containers, for example by means of plasma-enhanced chemical vapor deposition (PECVD) It is advantageous for the wall / hollow body wall to be provided with a shielding layer. [0003] For the coating of containers treated with plasma, for example the internal plasma coating of plastic bottles, so-called high-frequency plasmas can be used in particular. [0004] In this regard, for example, plasma is generated in the container by evacuating the inside of the container to a pressure range of 1-10 Pa and exposing it to a high-frequency region. By means of a gas lance, it is possible to introduce a gas...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H05H1/30B05D7/24
CPCH01J37/32596C23C16/045H01J37/32394C23C16/45578C23C16/509
Inventor 乔奇恩·克鲁格
Owner KRONES AG
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