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US 12,311,405 B2Granted
Method and device for producing a powder coating melt
AssigneeCoperion GmbH
InventorThorsten Stirner
Life of this patent
Estimating the term…
Abstract
In a method and a device for producing a powder coating melt, firstly a first powder coating melt is produced from a powder coating premix by a screw machine. Powder coating particles are supplied to the first powder coating melt. Then a second powder coating melt is produced by mixing the first powder coating melt and the powder coating particles by the screw machine. This allows a simple, gentle and efficient recycling of powder coating particles, in particular of so-called off-spec powder coating particles.
Claims25
A method for producing a powder coating melt, comprising the following steps:
- providing a screw machine with a housing, a first supply opening for supplying a powder coating premix into the housing, and a second supply opening arranged downstream for supplying powder coating particles into the housing,
- producing a first powder coating melt from the powder coating premix by means of the screw machine,
- supplying the powder coating particles into the first powder coating melt present in the screw machine by means of a supply device for supplying the powder coating particles to the screw machine through the second supply opening,
- wherein the supply device comprises a supply screw machine,
- wherein the supply screw machine has at least two screw shafts,
- wherein the supply screw machine is configured as a side feed machine and is connected to a side of the housing of the screw machine,
- wherein the supply device comprises a supply insert,
- wherein the supply screw machine is connected to the screw machine by means of the supply insert,
- wherein the supply insert comprises a supply channel component and a flange attached thereto,
- wherein the flange is attached to a housing of the supply screw machine and the supply channel component is arranged in an associated housing opening of the housing of the screw machine,
- cooling the supply screw machine by means of a cooling device,
- wherein the supply insert is cooled by means of the cooling device, and
- producing a second powder coating melt by mixing the first powder coating melt and the powder coating particles by means of the screw machine, wherein bores are formed in the supply channel component and the at least two screw shafts of the supply screw machine extend into said bores.
10 more elements
A device for producing a powder coating melt, comprising
- a screw machine with
- a housing,
- a first supply opening for supplying a powder coating premix into the housing, and
- a second supply opening arranged downstream for supplying powder coating particles into the housing, and
- a supply device for supplying the powder coating particles to the screw machine through the second supply opening, wherein the supply device comprises a supply screw machine,
- wherein the supply screw machine has at least two screw shafts,
- wherein the supply screw machine is configured as a side feed machine and is connected to a side of the housing of the screw machine,
- wherein the supply device comprises a supply insert,
- wherein the supply screw machine is connected to the screw machine by means of the supply insert,
- wherein the supply insert comprises a supply channel component and a flange attached thereto,
- wherein the flange is attached to a housing of the supply screw machine and the supply channel component is arranged in an associated housing opening of the housing of the screw machine,
- a cooling device for cooling the supply screw machine, wherein the supply insert is cooled by means of the cooling device, wherein bores are formed in the supply channel component and the at least two screw shafts of the supply screw machine extend into said bores.
9 more elements
A device for producing a powder coating melt, comprising
- a screw machine with
- a housing,
- a first supply opening for supplying a powder coating premix into the housing, and
- a second supply opening arranged downstream for supplying powder coating particles into the housing, and
- a supply device for supplying the powder coating particles to the screw machine through the second supply opening, wherein the supply device comprises a supply screw machine,
- wherein the supply screw machine has at least two screw shafts,
- wherein the supply screw machine is configured as a side feed machine and is connected to a side of the housing of the screw machine,
- wherein the supply device comprises a supply insert,
- wherein the supply screw machine is connected to the screw machine by means of the supply insert,
- wherein the supply insert comprises a supply channel component and a flange attached thereto,
- wherein the flange is attached to a housing of the supply screw machine and the supply channel component is arranged in an associated housing opening of the housing of the screw machine,
- a cooling device for cooling the supply screw machine, wherein the supply insert is cooled by means of the cooling device, wherein bores are formed in the supply channel component and said bores are mutually penetrating.
9 more elements
Dependencies are inferred from the claim text.