DE2245022A1 - Injection moulded coloured thermoplastic parts - with minimum use of dye and no contamination of mixing or conveying parts - Google Patents
Injection moulded coloured thermoplastic parts - with minimum use of dye and no contamination of mixing or conveying partsInfo
- Publication number
- DE2245022A1 DE2245022A1 DE19722245022 DE2245022A DE2245022A1 DE 2245022 A1 DE2245022 A1 DE 2245022A1 DE 19722245022 DE19722245022 DE 19722245022 DE 2245022 A DE2245022 A DE 2245022A DE 2245022 A1 DE2245022 A1 DE 2245022A1
- Authority
- DE
- Germany
- Prior art keywords
- dye
- mixing
- granular
- parts
- plastic mass
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
- 229920001169 thermoplastic Polymers 0.000 title claims description 3
- 238000011109 contamination Methods 0.000 title description 2
- 239000004416 thermosoftening plastic Substances 0.000 title description 2
- 238000002347 injection Methods 0.000 title 1
- 239000007924 injection Substances 0.000 title 1
- 229920003023 plastic Polymers 0.000 claims abstract description 26
- 239000004033 plastic Substances 0.000 claims abstract description 25
- 239000008187 granular material Substances 0.000 claims abstract description 4
- 238000001746 injection moulding Methods 0.000 claims description 11
- 238000000034 method Methods 0.000 claims description 7
- 238000004519 manufacturing process Methods 0.000 claims description 5
- 238000003825 pressing Methods 0.000 claims description 3
- 239000000203 mixture Substances 0.000 claims description 2
- 239000013078 crystal Substances 0.000 claims 1
- 229920000426 Microplastic Polymers 0.000 abstract 1
- 238000009434 installation Methods 0.000 abstract 1
- 239000000126 substance Substances 0.000 abstract 1
- 239000000975 dye Substances 0.000 description 28
- 239000003086 colorant Substances 0.000 description 3
- 238000004040 coloring Methods 0.000 description 3
- 239000012815 thermoplastic material Substances 0.000 description 3
- 238000004140 cleaning Methods 0.000 description 2
- 150000001875 compounds Chemical class 0.000 description 2
- 239000000945 filler Substances 0.000 description 2
- 239000000843 powder Substances 0.000 description 2
- 239000004952 Polyamide Substances 0.000 description 1
- 239000004743 Polypropylene Substances 0.000 description 1
- 239000004793 Polystyrene Substances 0.000 description 1
- 230000001771 impaired effect Effects 0.000 description 1
- 229920002647 polyamide Polymers 0.000 description 1
- -1 polypropylene Polymers 0.000 description 1
- 229920001155 polypropylene Polymers 0.000 description 1
- 229920002223 polystyrene Polymers 0.000 description 1
- 238000007711 solidification Methods 0.000 description 1
- 230000008023 solidification Effects 0.000 description 1
Classifications
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
- C08K9/00—Use of pretreated ingredients
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29B—PREPARATION OR PRETREATMENT OF THE MATERIAL TO BE SHAPED; MAKING GRANULES OR PREFORMS; RECOVERY OF PLASTICS OR OTHER CONSTITUENTS OF WASTE MATERIAL CONTAINING PLASTICS
- B29B9/00—Making granules
- B29B9/12—Making granules characterised by structure or composition
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C45/00—Injection moulding, i.e. forcing the required volume of moulding material through a nozzle into a closed mould; Apparatus therefor
- B29C45/17—Component parts, details or accessories; Auxiliary operations
- B29C45/18—Feeding the material into the injection moulding apparatus, i.e. feeding the non-plastified material into the injection unit
- B29C45/1816—Feeding auxiliary material, e.g. colouring material
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29K—INDEXING SCHEME ASSOCIATED WITH SUBCLASSES B29B, B29C OR B29D, RELATING TO MOULDING MATERIALS OR TO MATERIALS FOR MOULDS, REINFORCEMENTS, FILLERS OR PREFORMED PARTS, e.g. INSERTS
- B29K2105/00—Condition, form or state of moulded material or of the material to be shaped
- B29K2105/0005—Condition, form or state of moulded material or of the material to be shaped containing compounding ingredients
- B29K2105/0032—Pigments, colouring agents or opacifiyng agents
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Chemical & Material Sciences (AREA)
- Health & Medical Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Medicinal Chemistry (AREA)
- Polymers & Plastics (AREA)
- Organic Chemistry (AREA)
- Manufacturing & Machinery (AREA)
- Injection Moulding Of Plastics Or The Like (AREA)
- Processing And Handling Of Plastics And Other Materials For Molding In General (AREA)
Abstract
Description
Kennwort: "Kunststoffeinfärbung" Verfahren zur Herstellung von farbigen Werkstücken aus thermoplastischem Kunststoff im Spritzgußverfahren.Keyword: "Plastic coloring" Process for the production of colored Workpieces made of thermoplastic material in the injection molding process.
Die Erfindung betrifft ein Verfahren zur Herstellung von farbigen Werkstücken aus thermoplastischem Kunststoff im Spritzgußverfahren, wobei der Spritzgußmaschine eine von einer Mischanlage kommende Mischung von glasklarer Kunststoffmasse in Form von Granulat und Farbstoff zugeführt wird. Bei diesem bekannten Verfahren wird der granulierten Kunststoffmasse der Farbstoff in Pulverform oder Pastenform beigefügt. Das Mischen erfolgt dabei in der Regel in einer zentralen Mischanlage für mehrere Spritzgußmaschinen. Von der zentralen Mischanlage führen Förderer zu den einzelnen Spritzgußmashinen. Beim Fördern der mit Farbstoff vermischten Kunststoffmasse zu den Spritzgußmaschinen findet eine Entmischung statt, d.h. der Farbstoff bleibt an den Wänden des Förderers hängen. In der Mischanlage muß daher die Kunststoffmasse mit einem Überschuß an Farbstoff versehen werden, damit an jeder Spritzgußmaschine die Kunststoffmasse noch mit dem erforderlichen Anteil an Farbstoff ankommt.The invention relates to a method for producing colored Workpieces made of thermoplastic material in the injection molding process, the injection molding machine a mixture of crystal-clear plastic mass in the form of a mixing plant of granules and dye is supplied. In this known method, the granulated plastic mass of the dye in powder form or paste form. Mixing usually takes place in a central mixing plant for several Injection molding machines. From the central mixing plant, conveyors lead to the individual Injection molding machines. When conveying the plastic compound mixed with the dye The injection molding machines separate, i.e. the dye remains hang on the walls of the conveyor. The plastic compound must therefore be in the mixing plant be provided with an excess of dye, so on every injection molding machine the plastic mass arrives with the required amount of dye.
Außerdem ist die gesamte Anlage mit dem Farbstoff verschmutzt.In addition, the entire system is contaminated with the dye.
Vor der Herstellung von Werkstücken mit einer anderen Farbe muß daher die gesamte Anlage gereinigt werden.Before the production of workpieces with a different color must therefore the entire system can be cleaned.
Der Erfindung liegt die Aufgabe zugrunde, ein Verfahren zur Herstellung von farbigen Werkstücken aus thermoplastischem Kunststoff im Spritzgußverfahren zu schaffen, bei dem zum Einfärben der Werkstücke nur wenig Farbstoff erforderlich ist und bei dem eine Verschmutzung der Anlage nicht stattfindet. Dieses Ziel ist erfindungsgemäß im wesentlichen dadurch erreicht, daß der pulverförmige Farbstoff vor dem Mischen mit der granulierten Kunststoffmasse durch eine Verfestigung in eine körnige Form überführt wird. Dadurch wird in einfacher Weise erreicht, daß der Farbstoff der Kunststoffmasse in körniger Form beigefügt wird. Der körnige Farbstoff neigt dabei nicht zum Anhaften an den Wänden der Förderer bzw. der Mischanlage, so daß der gesamte Farbstoff in die Werkstücke gelangt, während die Mischanlage und die Förderer sauber bleiben.The invention is based on the object of a method for Manufacturing of colored workpieces made of thermoplastic material in the injection molding process to create in which only a little dye is required to color the workpieces and in which there is no contamination of the system. That goal is according to the invention essentially achieved in that the powdery dye before mixing with the granulated plastic mass by solidification in a granular shape is transferred. It is thereby achieved in a simple manner that the dye is added to the plastic mass in granular form. The granular dye does not tend to stick to the walls of the conveyor or the mixing plant, so that all of the dye gets into the workpieces while the mixer is in operation and the conveyors stay clean.
Vorteilhaft wird der pulverförmige Farbstoff durch Aufbringen von Druck klumpig gemacht und dann in eine körnige Form überführt. Dadurch wird zwar ein weiterer Arbeitsgang eingeführt, da der pulverförmig angelieferte Farbstoff in eine Körnerform überführt wird. Der Arbeitsaufwand für das Überführen des pulverförmigen Farbstoffes in eine körnige Form ist jedoch wesentlich geringer als das Reinigen der Mischanlage und der Förderer.The powdery dye is advantageous by applying Pressure made lumpy and then converted into a granular shape. This is true Another working step was introduced, as the dye was delivered in powder form is converted into a granular form. The labor involved in transferring the powdery However, dye in a granular form is much less than cleaning the mixing plant and the conveyor.
In vorteilhafter Weise wird beim Mischen der granulatförmigen Kunststoffmasse o,o5 bis 1,2 % Farbstoff in körniger Form beigefügt. Dadurch wird in einfacher Weise der granulatförmigen Kunststoffmasse nur sehr wenig Farbstoff beigefügt, ohne daß die Farbqualität beinträchtigt wird. Bei dicken Werkstücken wird nur o,o5 % Farbstoff beigefügt, während bei dünneren Werkstücken, bei denen ein Durchscheinen zu befürchten ist, etwas mehr Farbstoff beigefügt wird.Advantageously, when mixing the granular plastic mass 0.05 to 1.2% dye added in granular form. This is done in a simple manner very little dye added to the granular plastic mass without the color quality is impaired. In the case of thick workpieces, only 0.05% dye is used attached, while with thinner workpieces, where a shine through is to be feared is to add a little more dye.
Bei dem anmeldungsgemäßen Verfahren wird der pulverförmige Farbstoff durch Aufbringen von Druck klumpig gemacht und dann in eine körnige Form überführt. Diese Farbkörner werden dann in der üblichen Weise der im wesentlichen glasklaren Kunststoffmasse in Form von Granulat beigefügt. Als Kunststoffmasse werden dabei thermoplastische Kunststoffe, wie Polystyrol, Polypropylen, Polyamid od. dgl. benutzt. Je nach dem herzustellenden Gegenstand wird der Kunststoffmasse 0,05 bis 1,2 % körniger Farbstoff beigefügt. Für Gegenstände mit dicken Wänden ist dabei weniger Farbstoff und für Gegenstände mit dünnen Wänden ist mehr Farbstoff erforderlich. Der körnige Farbstoff wird in bekannter Weise in einer Mischanlage der Kunststoffmasse beigefügt.In the process according to the application, the powdery dye is used made lumpy by applying pressure and then into a grainy Form transferred. These color grains are then essentially in the usual manner crystal-clear plastic mass in the form of granules attached. As a plastic mass thermoplastics such as polystyrene, polypropylene, polyamide or the like. used. Depending on the object to be manufactured, the plastic mass is 0.05 to 1.2% granular dye added. For items with thick walls is included less dye and more dye is required for items with thin walls. The granular dye is in a known manner in a mixing plant of the plastic mass attached.
Die mit körnigem Farbstoff gemischte granulierte Kunststoffmasse wird dann über Förderer od. dgl. den einzelnen Spritzgußmaschinen zugeführt. Da der körnige Farbstoff die Mischanlage und die Förderer nicht verschmutzen, können ohne besondere Reinigung hintereinander Kunststoffteile mit unterschiedlichen Farben hergestellt werden. Die Körner des Farbstoffes haben dabei Vorteilhaft einen Durchmesser von zwei bis drei mm. Obgleich nur wenige Farbkörner in der granulierten Kunststoffmasse vorhanden sind, wird eine gleichmäßige Einfärbung des herzustellenden Kunststoffteiles erzielt.The granulated plastic mass mixed with granular dye becomes then fed to the individual injection molding machines via conveyors or the like. Because the grainy Dye can not pollute the mixing plant and the conveyors without special Cleaning one after the other plastic parts made with different colors will. The grains of the dye advantageously have a diameter of two to three mm. Although only a few grains of color in the granulated plastic mass are present, the plastic part to be manufactured will be evenly colored achieved.
Es sind zwar schon körnige Farbstoffe zum Einfärben von Kunststoffen bekannt geworden. Bei diesen körnigen Farbstoffen werden jedoch Füllstoffe benutzt. Von diesem körnigen Farbstoff mit Füllstoffen muß jedoch ein größerer Prozentsatz der granulierten Kunststoffmasse beigefügt werden. Trotzdem wird jedoch insbesondere bei gitterartigen Kunststoffteilen keine gleichmäßige Einfärbung erzielt.There are grainy dyes for coloring plastics known. However, fillers are used in these granular colorants. However, a larger percentage must be of this granular colorant with fillers be added to the granulated plastic mass. Even so, however, particular no uniform coloring achieved in the case of lattice-like plastic parts.
Claims (3)
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE19722245022 DE2245022A1 (en) | 1972-09-14 | 1972-09-14 | Injection moulded coloured thermoplastic parts - with minimum use of dye and no contamination of mixing or conveying parts |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE19722245022 DE2245022A1 (en) | 1972-09-14 | 1972-09-14 | Injection moulded coloured thermoplastic parts - with minimum use of dye and no contamination of mixing or conveying parts |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| DE2245022A1 true DE2245022A1 (en) | 1974-03-21 |
Family
ID=5856270
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| DE19722245022 Pending DE2245022A1 (en) | 1972-09-14 | 1972-09-14 | Injection moulded coloured thermoplastic parts - with minimum use of dye and no contamination of mixing or conveying parts |
Country Status (1)
| Country | Link |
|---|---|
| DE (1) | DE2245022A1 (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2000073752A1 (en) * | 1999-05-26 | 2000-12-07 | Effeci Engineering S.A.S. Di Fochesato Antonio & C. | Procedure for colouring and/or compounding thermoplastic and/or thermosetting polymers |
-
1972
- 1972-09-14 DE DE19722245022 patent/DE2245022A1/en active Pending
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2000073752A1 (en) * | 1999-05-26 | 2000-12-07 | Effeci Engineering S.A.S. Di Fochesato Antonio & C. | Procedure for colouring and/or compounding thermoplastic and/or thermosetting polymers |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| DE1467730B2 (en) | METHOD FOR MANUFACTURING MULTICOLOR ONE-PIECE COSMETIC PRODUCTS AND WAX PRODUCTS | |
| DE19902990C2 (en) | Method and device for injection molding molded parts | |
| DE1918083A1 (en) | Additional filling device | |
| DE1261661B (en) | Process and screw press for the continuous homogeneous admixture of finely distributed substances to plastic melts | |
| EP3284567B1 (en) | Device and method for producing a dyed and an undyed polymer melt | |
| DE2245022A1 (en) | Injection moulded coloured thermoplastic parts - with minimum use of dye and no contamination of mixing or conveying parts | |
| DE2458378A1 (en) | ARTICLE PRESSED FROM PLASTIC | |
| DE19646394C1 (en) | Extrusion system and process for extrusion with minimized color change times | |
| DE4331167A1 (en) | Process for producing a pigment concentrate for processing in plastics processing machines | |
| DE19857053A1 (en) | Production of tooth brush, involves adding e.g. pigment to melt in its flow paths from injection machine to tool cavity | |
| DE2021632A1 (en) | Process for the production of plastic or rubber-bonded grinding tools | |
| DE899550C (en) | Method and device for molding objects from thermoplastic and visually distinguishable plastics | |
| DE2744058A1 (en) | Injection moulding mottled thermoplastics articles - by plasticising components in separate plasticisers and different quantities and injecting into common head | |
| DE2223969C3 (en) | Color solid granulate for coloring polystyrene | |
| DE1146648B (en) | Process for the production of multicolored plastic semi-finished products on screw extrusion | |
| DE2152760A1 (en) | Mixing pigmented plastics - using softened polymer powder to bond pigment particles to pellets | |
| AT396444B (en) | METHOD AND DEVICE FOR CHANGING COLORS IN INJECTION MOLDING PLASTICS | |
| EP0305679B1 (en) | Traffic area marking material as well as method and device for its preparation | |
| DE4110679A1 (en) | Extrusion of thermoplastic waste mixt. - has chamber to give annular coating of virgin polymer to allow extrusion forming to accurate dimensions | |
| DE2117588A1 (en) | Colouring plastic articles - by adding dye to the melt in the extruder | |
| DE2417118A1 (en) | Universally applicable pigment granulates for inking plastics - contg hydrocarbon resin derived from unsatd coal tar or petroleum fractions | |
| DE1494038B2 (en) | PROCESS FOR MANUFACTURING TRANSPARENTLY COLORED PLASTICS BASED ON POLYSTYRENE | |
| AT305608B (en) | Molding line for the production of objects from multi-component or foamable plastic | |
| DE3829256A1 (en) | Shaped article for growing a seedling, and process and device for the preparation of such shaped articles | |
| DE2250561C3 (en) | Device for the dosed admixture of a finely powdered, baking-prone dye to a plastic granulate |