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Spray head

A technology of spray head and spray gun, applied in the field of spray head, can solve problems such as structural problems, large device volume, and purification problems.

Active Publication Date: 2008-04-09
KRAUSSMAFFEI TECH GMBH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] But the often bulky construction of such a device is always problematic
In addition, some problems arise when purging after each injection process

Method used

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Experimental program
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Embodiment Construction

[0020] The spray head of the present invention is shown in the figures without being connected to an overall system. However, the installation of such a spray head in such an overall system is sufficiently known from the prior art and does not need to be explained separately.

[0021] In the top view of FIG. 1, a first embodiment of an inventive injection head 10 is shown, in which a row of connected inlets and outlets are formed on a real and central mixing body 12 for the respective reactive raw materials and Other media, which are described in detail below.

[0022] A first material component for forming a reactive material mixture is supplied to the mixing body 12 via an inlet line 14 . The first material component can be returned via the return line 18 to a container (not shown) when no spraying process is carried out. Overall, the two lines 14 and 18 can be connected to a high-pressure system in which the material is supplied with a corresponding pressure from a contai...

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PUM

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Abstract

The present invention relates to a spray nozzle which is used for discharging one material comprising at least two reactive component and includes the following components: a material supplying device (14) for the first component; a material supplying device (18) for the second component; a mixing chamber (44) that is flowing connected with each material supplying device (14 and 18) and is used for mixing the two components; a reciprocating piston (32); and a discharging channel (27) which is used to discharge each component mutually mixed and is connected to or can be connected to the mixing chamber; according to the invention the mixing chamber (27) is basically arranged in the reciprocating piston (32), and the piston (32) and each material supplying device (14 and 18) are composed to facilitate that the supplying of each component at a first position of the piston (32) at least is possible and the mixing chamber (44) is flowing connected or can be connected to the discharging chamber (27).

Description

technical field [0001] The invention relates to a spray head according to the preamble of claim 1 . Background technique [0002] Spray heads for applying reactive materials to a surface are generally known. In order to firstly mix a polyurethane material from the components polyol and isocyanate and then apply it to a surface, for example the surface of a mould, such spray heads are used, for example. After the two reactive components have reacted completely, a thin plastic film forms on the surface, which can be peeled off. Such a plastic film can then be post-foamed or post-injected, so that a product can be created with a surface film of a tactilely receptive polyurethane material. [0003] Injection heads are also known in which two reactive components are mixed with one another in a mixing chamber and the mixture is discharged via an outlet channel and a nozzle. [0004] However, the often bulky construction of such a device is always problematic. Furthermore, some...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B29B7/76
CPCB29K2075/00B29B7/7663B29B7/76
Inventor E·沙伊特
Owner KRAUSSMAFFEI TECH GMBH