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Equipment for dusting printed sheets with powder

A powder and sheet technology, applied in the general parts of printing machinery, printing, printing machines, etc., can solve the problems of supply pressure change, air-powder-mixture quality influence, etc., and achieve the effect of saving structure space

Active Publication Date: 2019-11-08
海德堡印刷机械知识产权股份两合公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] Disadvantageously, in the case of nozzle pressure changes, the supply pressure for the injection part also inevitably changes
The quality of the air-powder-mixture suffers due to this side effect

Method used

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  • Equipment for dusting printed sheets with powder
  • Equipment for dusting printed sheets with powder
  • Equipment for dusting printed sheets with powder

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0018] Figure 1 to Figure 3 The powder equipment is shown separately. The powder device is arranged in a sheet collector of a flat offset printing press and serves to spray the printed sheets. During spraying, the printed sheets are transported by the chain conveyor of the sheet collector through the powder plant and deposited on the collecting stack of the sheet collector after spraying.

[0019] The powder plant comprises a storage container 1 with a powder supply 2 . The storage container 1 is funnel-shaped or conical, and the powder storage 2 forms a stacked column. A meter 3 having a metering roller 4 is connected to the lower end of the storage container 1 . Powder from powder store 2 is conveyed by gravity into meter 3 and metered by metering rollers 4 . The metered powder enters into the injection part 5 which is connected to the meter 3 . In the injection section 5, the powder is mixed with compressed air to form an air-powder mixture.

[0020] Pressurized air ...

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PUM

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Abstract

A device for powdering printed sheets (15) in a printing machine comprises an injector (5) for forming an air-powder mixture, a supply line (6) for guiding compressed air into the injector (5), and a spray bar (12) for spraying powder. A bypass line (16) branches off from the supply line (6) and communicates with a component behind the injector (5). The component is, for example, a connection line (8) connecting the injector (5) with a distributor (10).

Description

technical field [0001] The invention relates to a device for dusting printed sheets with powder in a printing press. Background technique [0002] DE 10 2013 018 825 A1 describes a powder plant in which a control device is integrated in the supply line for controlling the supplied compressed air. The nozzle pressure of the nozzles of the spray bar can be controlled by means of the control device. [0003] Disadvantageously, when the nozzle pressure varies, the supply pressure for the injection section also inevitably varies. The quality of the air-powder mixture is affected by this side effect. Contents of the invention [0004] The object of the present invention is to realize a powder plant in which the nozzle pressure can be varied independently of the formation of the air-powder mixture. [0005] This object is solved by a device having the features according to the invention. The device according to the invention for powdering a printed sheet in a printing press c...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B41F23/06
CPCB41F23/06
Inventor C·哈斯C·鲁帕纳J·居克尔T·格特纳
Owner 海德堡印刷机械知识产权股份两合公司