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3D printing nozzle and forming method of liquid crystal polymer film

A liquid crystal polymer, 3D printing technology, applied in the direction of 3D object support structure, coating device, additive manufacturing, etc., can solve the problems of high cost, long production cycle, complicated process, etc., to increase the molding pressure and improve the orientation problem Effect

Pending Publication Date: 2019-04-19
SHENZHEN SUNWAY COMM
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] Traditional subtractive manufacturing techniques generally use methods such as cutting, grinding, corrosion, and melting to obtain products of specific shapes, and then process them through post-molding methods. The production cycle is long, the process is complicated, and the product scrap rate is high. high cost

Method used

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  • 3D printing nozzle and forming method of liquid crystal polymer film
  • 3D printing nozzle and forming method of liquid crystal polymer film
  • 3D printing nozzle and forming method of liquid crystal polymer film

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Experimental program
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Embodiment 1

[0037] Please refer to figure 1 , Embodiment 1 of the present invention is:

[0038] A 3D printing nozzle, comprising an outer shell 1 and an inner core 2, the inner core 2 is located in the outer shell 1, the central axis of the inner core 2 coincides with the central axis of the outer shell 1, and the inner core 2 It is rotatably arranged relative to the outer shell 1, that is, the inner core 2 can rotate around its central axis. The outer surface of the inner core 2 is provided with a helix, preferably, the angle between the helix and the center line of the inner core 2 is 40-50°, more preferably the helix and the The included angle between the centerlines of the inner cores 2 is 45°. The inner surface of the housing 1 is provided with a thermal insulation layer 3, preferably the material of the thermal insulation layer 3 is an airgel ceramic composite material, specifically, a commercial airgel thermal insulation blanket can be used, the model is CTB650, The thermal con...

Embodiment 2

[0040] Embodiment 2 of the present invention is a method for forming a liquid crystal polymer film, which is formed by 3D printing with the 3D printing nozzle described in Embodiment 1. The forming process of the liquid crystal polymer film specifically includes:

[0041] 1. Heat treatment of raw materials used to form liquid crystal polymer films. In this embodiment, heat treatment is performed on the raw material under vacuum condition, the temperature of the heat treatment is 140-160° C., and the time of the heat treatment is 4-18 hours. The raw materials used can be LCP resins synthesized by copolymerization between polyphenyl ring rigid molecular monomers, introduction of naphthalene rings into the molecular structure, and use of aliphatic segments in the molecular chain. The melting point of the resin is in the range of 250-380°C. In the present embodiment, the density of the raw material used is 1.3~1.5g / cm 3 .

[0042] 2. Extrude the heat-treated raw materials to ob...

Embodiment 3

[0051] Embodiment 3 of the present invention is a method for forming a liquid crystal polymer film, which differs from Embodiment 2 in that:

[0052] The temperature of the heat treatment is 150° C., and the time of the heat treatment is 12 hours. The temperature of the annealing treatment is 220° C., and the time is 60 minutes. The obtained liquid crystal polymer film had a thickness of 25 μm.

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Abstract

The invention discloses a 3D printing nozzle and a forming method of a liquid crystal polymer film. The 3D printing nozzle comprises a shell and further comprises an inner core. The inner core is located in the shell. The central axis of the inner core coincides with the central axis of the shell. The inner core is rotatably arranged relative to the shell. The inner core of the spray nozzle is rotatably arranged relative to the shell. When a melt is subjected to mixing and plastifying, the forming pressing can be increased, and a raw material is transformed well from zero dimension to three dimension. When the liquid crystal polymer film is formed through the spray nozzle, the problem of orientation of the liquid crystal polymer film on a 2D plane can be improved remarkably, and the mechanical properties of the obtained liquid crystal polymer film in all directions are equivalent.

Description

technical field [0001] The invention relates to the technical field of material processing, in particular to a 3D printing nozzle and a method for forming a liquid crystal polymer film. Background technique [0002] At present, the commercial thermotropic liquid crystal polymer (LCP) has better high-frequency performance, lower dielectric loss, good dimensional stability and low water absorption (less than 0.4%) than polyimide (PI) materials, etc. Advantages, but its film or plate production is very difficult. [0003] In the molten state of liquid crystal polymer, its liquid crystal molecules are easily oriented under the action of shear force. In a planar film or plate, the orientation of liquid crystal molecules will cause obvious anisotropy. Therefore, the orientation of liquid crystal molecules should be avoided as much as possible during the forming process of LCP film. [0004] There are foreign literature reports that there are many ways to change the molecular ori...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B29C64/209B29C64/118B29C64/379B29C71/02B29C48/05B33Y10/00B33Y40/00B29L7/00
CPCB29C64/118B29C64/209B29C64/379B29C71/02B33Y10/00B33Y40/00B29C2071/022B29L2007/00
Inventor 苏聪虞成城宋喆
Owner SHENZHEN SUNWAY COMM
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