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Polyurethane-mixed head with spray Nozzle for a spray head and uses of spray nozzle

A technology of mixing head and polyurethane, which is applied in the direction of spraying device, spraying device, liquid spraying device, etc., and can solve the problem of not being able to use the nozzle

Active Publication Date: 2010-11-17
KRAUSSMAFFEI TECH GMBH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This nozzle must therefore never be used in polyurethane mixing heads

Method used

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  • Polyurethane-mixed head with spray Nozzle for a spray head and uses of spray nozzle
  • Polyurethane-mixed head with spray Nozzle for a spray head and uses of spray nozzle
  • Polyurethane-mixed head with spray Nozzle for a spray head and uses of spray nozzle

Examples

Experimental program
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Embodiment Construction

[0031] In the following description only the spray nozzles for the spray heads are shown. Such spray nozzles are attached to a mixing head nozzle 10 which is arranged on a mixing head of a polyurethane plant (not shown). Such a device including such a mixing head is known, for example, from EP 0 389 014 B1. Usually, two reactive raw materials, such as polyol and isocyanate, are fed to such a mixing head. These materials are then mixed with one another in a mixing head and subsequently discharged. The reacted discharge mixture can be applied via spray nozzles to a surface where the mixture reacts thoroughly and forms a plastic surface.

[0032] Depending on the surface structure, this surface layer can be formed as a textured or otherwise structured surface. These skins can be further processed by post-injection or post-foaming, the skins themselves forming the decorative surface.

[0033] In order to form a good quality polyurethane skin, it is necessary to have the expell...

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Abstract

The present invention relates to a nozzle for a spray head, comprising a nozzle body (14) having a cavity which can be supplied with discharge material via a material inlet and in which a swirl body (18) is arranged which has arranged on it a nozzle insert (16) with a nozzle hole (26) via which the discharge material can be sprayed out. The swirl body (18) has a disk- or plate-like part on which an annular web (46) is arranged, with the disk- or plate-like part being interrupted by at least one opening (44) which is arranged radially outside the annular web (46), the annular web (46) being interrupted at at least one point radially from the outside to the inside by at least one substantially helical groove (48), and the swirl body (18) and the nozzle insert (16) being arranged in the nozzle body (14).

Description

technical field [0001] The invention relates to a polyurethane mixing head with a spray head nozzle and the use of a nozzle for a spray head of a polyurethane mixing head. Background technique [0002] Methods and devices for applying a spray coat, in particular a polyurethane spray coat, to a surface are known from EP 0 303 305 B1 and EP 0 389 014 B1. [0003] A nozzle of this type is described in EP 0 389 014 B1 for use in spray guns and for producing a polyurethane layer on a surface by spraying reactive components. The spray nozzle has an atomizing element with a substantially funnel-shaped cavity, which is connected at its widest end on the one hand to an inlet channel for the reaction components to obtain polyurethane and on the other hand at its narrowest point Opens into a substantially cylindrical channel. Furthermore, a core element is provided, which is designed to guide the reaction components in a helical or swirling motion through the above-mentioned atomizat...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B05B1/34
CPCB05B1/3436B05B7/10B05B7/0408
Inventor E·沙伊特S·霍伯尔斯伯格
Owner KRAUSSMAFFEI TECH GMBH
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