Plastics processing method and apparatus
AssigneeColormatrix Holdings, Inc.
InventorMichael D. See
Life of this patent
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Abstract
A method for additive delivery during a plastics processing is disclosed. The method includes establishing a network of components in a control loop that uses a feedback method to drive at least one pump, thus enabling continuous, robust proportioning of additive in a difficult to control environment. The feedback method includes sending at least one signal from at least one sensor associated with a plastics melting machine to a controller, sending one or more signals from the controller to the at least one pump, monitoring the pressure in the at least one pump and sensing the position of an injection nozzle valve, and sending one or more signals to the injection nozzle valve instructing the valve to open or close.
Claims22
A method for additive delivery during plastics processing wherein said method comprises:
- establishing a network of components in a control loop, wherein said control loop uses a feedback method to drive at least one pump, said feedback method comprising:
- sending at least one signal from at least one sensor associated with a plastics processing device to a controller;
- sending one or more signals from said controller to said at least one pump;
- monitoring the pressure in the at least one pump and sensing the position of an injection nozzle valve;
- and
- sending one or more signals to said injection nozzle valve instructing said valve to open or close.
An additive delivery system for the accurate introduction of an additive in plastics processing, for example for introduction into aplastic melting process comprising:
- at least one sensor associated with a plastics processing device, for example a melting apparatus;
- a high pressure nozzle controller;
- at least one pump;
- and
- a high pressure nozzle, wherein said system comprises a logic based control loop that is adapted to use a feedback logic method to drive the at least one pump and an injection nozzle valve.
A high pressure injection nozzle for downstream additive delivery in plastics processing, comprising:
- a land having a length between about 3 inches and 5 inches to facilitate downstream injection;
- a duel seal system including an outer seal and an inner seal;
- high pressure tubing;
- and
- a cooling mechanism to protect the nozzle from heat build-up.
A process for providing proportional additive delivery into a plastics processing device, for example a melting machine comprising:
- establishing a proportion based on amperage of a plastics processing device, for example a melting machine and the revolutions per minute (RPM) of an associated pump;
- programming zones with various step-wise slopes delineated by specific conditions within said plastics processing device, for example melting machine;
- and
- programming the delivery of an additive to said plastics processing device, for example melting machine based on said zone to maintain proportional additive delivery.
Dependencies are inferred from the claim text.