Compact system for clean dosing of liquid colors in plastic injection molding and in extrusion
colorDoS® is a compact dosing system for liquid colors in plastic injection molding and in extrusion. The special design of the dosing nozzle prevents against color transfer and ensures a fast and clean color change. The smallest quantities of color are possible.
The feed system is mounted above the injection molding machine or extruder directly in the feed area of the conveying screw. It can be integrated into existing machines. The display control synchronizes the volumetric dosing pump and the operating steps of the system for precise metering of the liquid color. The control system further includes cleaning mode, color code management, remaining time display, alarm manager, and others.
The use of colorDoS together with liquid colors offers a real alternative to common masterbatches in many cases. It significantly reduces waste during color changes, protects the environment, ensures optimum machine capacity utilization rate, and saves material and time. Moving away from master batch and towards liquid color for the coloration of plastics is possible with colorDoS.
If you have any specific question about the dosing system, please contact our colorDoS expert Mr. Olaf Lang at email@example.com.
We are happy to advise you on your colorDoS systems solution, support the on-site implementation and train your staff in the use of the dosing system for liquid colors.
At FAKUMA, in October 2023, an extension of the system for use in extrusion will be presented.
Advantages at a glance
- Compact dosing system
easy installation directly above the feed area of the injection molding machine or extruder
- Gentle precision dosing
high color fidelity with minimum color application by micro annular gear pump
- Clean handling
dripless quick-release couplings, short fluid connections, dosing nozzle design for smallest color quantities without color transfer in the feeding area
- Fast color change
low void volume allows fast rinsing of the pump module and thereby a fast color change
- Intuitively operated display control
different operator levels, remaining time display until container change, alarm manager, color formulation management, cleaning mode, communication with injection molding machine, etc.
Functions of the colorDoS control
- Different operator levels
operator, administrator, service
- Remaining time display
with adjustable advance warning time until container change
- Color code management
storage of up to 30 color code formulations
- Cleaning mode
enables fast color change
- Alarm manager
displays warnings (e.g. low filling level) or failures and can stop the injection molding machine to avoid rejects.
- Micro annular gear pump
- Dosing nozzle
- Adapter unit
- Container holder with load cell
- Dripless quick-release couplings
- Display Control
- Signal light
- Tube kit
- Liquid colors
- Plastic injection molding
Please contact the manufacturer of your choice with your inquiries about liquid colors. Based on our experience, we can recommend the following manufacturers.
This overview includes only manufacturers of liquid colors with which we have gained our own experience. It is not a full manufacturer overview.
Manufacturer for liquid colors
REPI operates since 1973 as a global supplier of liquid colours and functional additives for plastics and thermoset resins. A complete portfolio of colour and additive solutions is offered to all industrial applications ensuring maximum compatibility and performance to the specific thermoplastic polymers, from PET to HDPE, PP, PVC, ABS, PC, PMMA and recycled polymers. The liquid colour and additive technology ensures excellent dispersion, high concentration and colour strength, as well as precision in dosing and efficiency in logistics and storage. The customer is assisted during all steps of product development, from colour matching up to the introduction into the industrial process and consequent control of performance and compliance.
ROWASOL has been part of the ROWA Group from Pinneberg since 2004 and is a specialist for high-quality liquid colors and additive concentrates for efficient plastics processing. Customer-specific solutions are developed and produced at the Karstädt site in the Federal State of Brandenburg. The implementation at the customer site is supported step by step by the technical customer service. The product portfolio is completed by the reusable container ROWASOL COLOR CUBE for a resource-saving and clean handling of the products.
Habich Farben, a family business since 1785, produces liquid colors for industrial coloring at its site in Reinhardshagen. The variety and flexibility of HABISOL liquid colors are due to the preparation form and are therefore universally applicable. The team of colorists and production engineers offers you complete advice on all aspects of liquid colors and processing and supports you in complying with legal regulations such as BfR and FDA. HABISOL liquid colors are also available for use in bio-based and compostable plastics, as effect colors and as mono-colors for mixing by yourself.
Product video colorDoS
Shot weightInjection molding: as of 2 g (depending on color addition and ink density)
Material throughputExtrusion: 2… 600 kg/h (depending on color addition and ink density)
Color additionInjection molding: as of 0.1 % (depending on shot weight and color density)
Extrusion: as of 0.1 % (depending on material throughput and color density)
Dosing volumeInjection molding: 0.02 … 100 g color/shot (depending on dosing time and viscosity)
Volume flowExtrusion: 0.2 … 100 ml/min (depending on viscosity)
Precision CV< 1 % (Coefficient of variation CV)
Clearance volumeapprox. 3 ml
Color change durationas of 120 s
Container change durationas of 10 s
Viscosity range0.3 … 10,000 mPas
Liquid temperature range-5 ... +60 °C (+23 ... +140 °F)
AdaptionInjection molding: 4 x M6, 60 x 60 mm (standard Arburg flange pattern)
Extrusion: 4 x M8, 100 x 100 mm
other dimensions can be realized with adapter plates
Container dimensions1, 5, 10 and 20 liter container; Colorcube (max. weigth 30 kg)
Fluid connectiondripless quick-release coupling
InterfaceInjection molding: start signal, error message to injection molding machine (potential-free contact)
Extrusion: start signal, error message to extruder (potential-free contact), analog signal 0…10V
signal light and acoustical signal (potential-free contact)
Controllerintuitively operated display control with 7" touch display
Electrical connection230 V AC
Dimensions (L x W x H)Injection molding: 256 x 487 x 362 mm [10.1 x 19.2 x 14.3 in]
Extrusion: 307 x 487 x 362 mm [12.1 x 19.2 x 14.3 in]
WeightInjection molding: approx. 18 kg
Extrusion: approx. 27 kg
(depending on the container holder)
Even if single parameters are within the indicated performance range of technical data, certain parameter combinations may not be achievable. Single parameters may exceed their indicated performance range under adequate circumstances. For detailed evaluation please contact HNP Mikrosysteme. Actual performance may vary. Specifications are subject to change without notice.
This document is subject to change without notice.
- Fiche produit Dosing system for liquid colors DE EN 676.25 Ko
- Operating manual colorDoS DE EN 2.06 Mo