Passive z-axis alignment
US-9481133-B2 · Nov 1, 2016 · US
Extruder feed system
US9912001B2 · US · B2
| Field | Value |
|---|---|
| Publication number | US-9912001-B2 |
| Application number | US-201414448364-A |
| Country | US |
| Kind code | B2 |
| Filing date | Jul 31, 2014 |
| Priority date | Aug 7, 2013 |
| Publication date | Mar 6, 2018 |
| Grant date | Mar 6, 2018 |
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- Title
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- Abstract
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- First independent claim
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- CPC / IPC classifications
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Abstract
Official abstract text for this publication.
Extruder feed system. The system includes a pair of spaced-apart, internally and oppositely threaded rotatable elements for receiving and engaging a plastic filament material. An electric motor rotates the rotatable elements in opposite directions thereby to drive the filament into a liquefier chamber for subsequent discharge through a nozzle. The system provides very accurate layer-by-layer build up.
First claim
Opening claim text (preview).
What is claimed is: 1. Extruder feed system comprising: a pair of spaced-apart, internally and oppositely threaded rotatable elements for receiving and engaging a filament material; an electrical motor for rotating the rotatable elements in opposite directions thereby to drive the filament into a liquefier chamber for subsequent discharge through a nozzle; and further including a control loop for controlling the product of motor current and motor voltage thereby to control the filament material extrusion rate that is linearly proportional to the product of motor current and motor voltage. 2. The system of claim 1 further including a gear train driven by the motor to rotate the rotatable elements in opposite directions. 3. The system of claim 1 wherein the motor is a stepper motor. 4. The system of claim 1 wherein the motor is a DC motor. 5. The system of claim 2 wherein the gear train includes a beveled gear driven by the motor. 6. The system of claim 1 wherein the rotatable elements are internally threaded hex nuts. 7. The system of claim 1 wherein the motor is an AC motor. 8. The system of claim 2 wherein the gear train includes a belt or cable driven with pulleys.
Assignees
Inventors
Classifications
Apparatus for additive manufacturing; Details thereof or accessories therefor · CPC title
Measuring, controlling or regulating · CPC title
Means for allowing relative movements between the apparatus parts, e.g. for twisting the extruded article or for moving the die along a surface to be coated · CPC title
Position, e.g. linear or angular · CPC title
using filamentary material being melted, e.g. fused deposition modelling [FDM] · CPC title
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Frequently asked questions
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- What does patent US9912001B2 cover?
- Extruder feed system. The system includes a pair of spaced-apart, internally and oppositely threaded rotatable elements for receiving and engaging a plastic filament material. An electric motor rotates the rotatable elements in opposite directions thereby to drive the filament into a liquefier chamber for subsequent discharge through a nozzle. The system provides very accurate layer-by-layer bu…
- Who is the assignee on this patent?
- Massachusetts Inst Technology
- What technology area does this patent fall under?
- Primary CPC classification H01M10/0564. Mapped technology areas include Electricity.
- When was this patent published?
- Publication date Tue Mar 06 2018 00:00:00 GMT+0000 (Coordinated Universal Time) (B2). Legal status and post-grant events are not shown on this page.
- What related patents are in patentsdb?
- We list 6 related publications on this page (citations in our corpus or others sharing the same primary CPC).