How to determine the nozzle tip length for a 3D printer.

Abstract

OCR 09WP 21 / 04 / 2569 The method for determining the nozzle tip length consists of three steps: Step one, determination... Parameters for injecting fibrous materials include the characteristics of the fibrous material and its diameter. The center of the nozzle, the size and operating temperature of the heating device that melts the fibrous material. Before entering the nozzle, and the pressure applied to the fibrous material being fed into the heating device, is the second step. The specification and parameters determine the size of the nozzle, with a number of options to choose from. This is the third step. Simulation of the flow rates of molten fibrous material exiting a number of select nozzles. Each option, with computational fluid dynamics simulation, steps four: identifying the nozzle type. The option that yields the highest flow rate simulation results in the third step. Step five: Flow rate simulation. The flow of molten fibrous material exiting the nozzle is determined by a number of nozzle options specified. The fourth step involves a computational fluid dynamics simulation unit, where a number of optional nozzles are selected. These have different nozzle tip lengths, and step six involves identifying the nozzle tip length. The optional nozzle that provides the highest simulated flow rate in the fifth step.

Claims

OCR 09WP 21 / 04 / 2569 1. Method of determining the length of the nozzle tip (100) nozzles for spraying fiber materials by A 3D printer using FDM technology, which includes; Step one (101) Parameter configuration for fiber material injection including Characteristics of the fiber material, nozzle diameter, size, and temperature. The heating device melts the fibrous material before it enters the nozzle, and the pressure... Provided to the fibrous material that is fed into the heating device; Step two (102) Characterization and parameters determine the size of the nozzle. There are a number of options; Step three (103) Simulation of the flow rate of the molten fibrous material that is released. From a number of nozzle options, each option is simulated using fluid dynamics. calculate; Step four (104) Identifying the optional nozzle which has the flow rate simulation results in Step three (103) maximum, Step five (105) Simulation of the flow rate of the molten fibrous material being expelled. From the number of select nozzles of the nozzles specified in step four (104) with the unit Computational fluid dynamics simulation where a number of selectable nozzles have... The lengths of the nozzle tips are different; and Step six (106) Identifying the tip length of the optional nozzle which has The results of the flow rate simulation in the fifth step (105) are maximum.

2. Method of determining the length of the nozzle tip (100) in accordance with claim 1, in which step One (101) characteristic of the fibrous material includes the properties and dimensions of the fibrous material.

3. Method of determining the length of the nozzle tip (100) according to claim 1 or 2, in which Step two (102) Characteristics and parameters determine the size of the optional nozzle number. One aspect includes the shape of the nozzle, the radius of curvature of the nozzle tip, and the length of the nozzle tip. The length of the pipe extending from the nozzle tip.

4. Method of determining the length of the nozzle tip (100) according to one of the claims 1 to 3. Where the fibrous material is polylactic acid.

5. Method of determining the length of the nozzle tip (100) according to one of the claims 1 to 4. Where the nozzle, whose length has been determined, is made of stainless steel and has a diameter of... The center diameter is 1 millimeter, and the nozzle tip length ranges from 3.2 to 5.7 millimeters. Or, the angle of the nozzle tip is in the range of 26.55 to 40.19 degrees.

6. Method of determining the length of the nozzle tip (100) according to one of the claims 1 to 5. In step one (101), the heating device melts the fibrous material before it enters the nozzle. A tubular heating device with a length of 50 millimeters and an operating temperature of 220 degrees. Celsius 7. Method of determining the length of the nozzle tip (100) according to one of the claims 1 to 6. In step one (101), the pressure applied to the fibrous material is fed into the device. The temperature is 9.9 megapascals.

8. Method of determining the length of the nozzle tip (100) according to one of the claims 1 to 7. where the flow rate of the molten fibrous material is the result of the simulation in step five (105). It is in the range of 3.2 to 5.5 grams per second.

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