Device for dosing dyes for preparation of dyeing baths

Abstract

Device for dosing dyes in solution or dispersion for the preparation of dye baths for textile materials, comprising a plurality of pipettes (1) individually connected to corresponding bottles or containers (6) containing the said dyes, the said bottles or containers being respectively connected to a dosing head (8) through corresponding ducts (9) from which the dyes exit. The device comprises programmable means (EU) which individually control the said pipettes (1) and respective electrovalves (4) and which, depending on the formulation programmed to realize a dye bath, operate the automatic subdivision or selection of the electrovalves (4) in two groups. A first group of electrovalves (4) initially connect the respective bottles (6) with the corresponding pipettes (1) through the ducts (5) and (7), as the electrovalves (4) of the second group, and in a subsequent step connect the respective pipettes (1) with the dosing head (8) through the ducts (5) and (9) and then restore the individual links once the dosing is completed; the electrovalves (4) of the second group constantly maintain the connection between the respective pipettes (1) and the corresponding bottles (6).

Description

technical field [0001] The invention relates to a device, in particular a multi-sipper device, for dosing coloring agents in the form of solvents or dispersants for the preparation of dye pools for textile materials. Background technique [0002] Known devices comprising straw dispensers are used to dispense temporarily and to dose multiple liquid products in order to minimize the time required for preparation of solvent based formulations or "recipes" requiring multiple ingredients. [0003] The device is based on figure 1 The diagrammatic action shown: a three-way valve V is mounted on the outlet of each drinking pipe P, each of which is electrically operated and connected through a first conduit C1 to a bottle B containing a liquid composition, and through a second conduit C2 at the outlet connected to the same suction pipe P, where a second conduit terminates in a metering head (not shown), into which similar conduits enter from other valves, where other valves disperse...

AI Technical Summary

Problems solved by technology

Prolonged retention of product in conduit C2 leads to deposition of dissolved material in the lower part and on the conduit wall, which can cause significant precision problems in subsequent measurements

[0005] Also, due to the length of the conduit C2, unexpected dripping of the product during dosing of other ingredients may occur, as a result, incorrect execution of the programmed recipe may occur

[0006] Another disadvantage is that the length of the conduit C2 varies with the straw

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