SYSTEM TO CHANGE COLOUR INSTANTANEOUSLY DOWNSTREAM FROM THE BARREL DURING THERMOPLASTICS INJECTION MOULDING

The aim of this invention is to improve the efficacy of a process for changing colours in an injection-moulding machine, essentially by injecting the dye (16) directly at the entrance of the injection nozzle (7) downstream from the barrel of a plasticiser unit fitted with a hopper (4), a barrel or b...

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Bibliographische Detailangaben
Hauptverfasser:	GOMES DE SA, PEDRO MIGUEL, SOARES MARTINS FERREIRA, VITOR HUGO, DA SILVA ANACLETO, DANILO
Format:	Patent
Sprache:	eng ; fre ; por
Schlagworte:	AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING PERFORMING OPERATIONS SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDEDFOR SHAPING OR JOINING OF PLASTICS TRANSPORTING WORKING OF PLASTICS WORKING OF SUBSTANCES IN A PLASTIC STATE, IN GENERAL
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Beschreibung
Zusammenfassung:	The aim of this invention is to improve the efficacy of a process for changing colours in an injection-moulding machine, essentially by injecting the dye (16) directly at the entrance of the injection nozzle (7) downstream from the barrel of a plasticiser unit fitted with a hopper (4), a barrel or barrel tip (1), a screw (2), and an injection nozzle (7), using a coupler body (9) arranged between the barrel or barrel tip (7) and the mould (3). La présente invention a pour objet d'améliorer l'efficacité du processus de changement de couleur dans une machine de moulage par injection, et consiste essentiellement à injecter le colorant (16) directement à l'entrée du bec d'injection (7) en aval du cylindre d'une unité de plastification dotée d'une trémie (4), d'un cylindre/pointe (1), d'une vis (2) et d'un bec d'injection (7), avec utilisation d'un organe d'accouplement (9) placé entre le cylindre/pointe (1) et le moule (3). O presente invento tem por objecto melhorar a eficácia do processo de mudança de cor numa máquina de moldação por injecção e consiste essencialmente em se injectar o corante (16) directamente na entrada do bico de injecção (7) a jusante do cilindro de uma unidade de plasticização dotada de tremonha (4), cilindro/ponteira (1), fuso (2) e bico de injecção (7), utilizando um corpo acoplador (9) colocado entre o cilindro/ponteira (7) e o molde (3).