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Method for detecting carbon black in polymer material for selective laser sintering

A polymer material and laser sintering technology, applied in the field of additive manufacturing, can solve the problems that are not conducive to the large-scale detection of carbon black industrialization, slow gradient temperature rise, long cycle, etc., to achieve simple and easy detection methods, reduce the difficulty of use, and protect environmental effects

Active Publication Date: 2021-03-26
HUNAN FARSOON HIGH TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Third, the method of using thermal characteristics to realize carbon black detection requires a second charge of air in the equipment and a slow gradient temperature rise, and the cycle of material testing is also longer
Fourth, these methods only quantitatively detect the content of materials, while qualitative detection requires other professional equipment
It can be seen from the above that these techniques are not conducive to the industrialized large-scale detection of carbon black in polymer materials for selective laser sintering.

Method used

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  • Method for detecting carbon black in polymer material for selective laser sintering
  • Method for detecting carbon black in polymer material for selective laser sintering
  • Method for detecting carbon black in polymer material for selective laser sintering

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preparation example Construction

[0035] The inventor of the present application provides a preparation method for the detection method of carbon black in polymer materials for selective laser sintering through the above-mentioned creative work, the method comprising the following steps:

[0036] Step 1, adding white powder to the material to be tested and stirring at a high speed to obtain a sample to be tested, the weight ratio of the material to be tested to the white powder is 1:1-19;

[0037] Step 2, measure the hue value and chromaticity parameter of the sample to be tested, first substitute the hue value into the pre-stored hue value database, and determine the carbon black type of the sample to be tested according to the range of the hue value; then the chromaticity parameter Substituting into the pre-stored standard function model corresponding to the type of carbon black to which the sample to be tested belongs, obtains the content value of carbon black in the sample to be tested; wherein,

[0038] T...

Embodiment 1

[0058] Calibration group 1

[0059] Take CB1, CB2, CB3 (three different types of carbon black represented by CB1, CB2 and CB3) nylon 12 materials with carbon black contents of 1%, 1.5%, 2%, 2.5%, and 3% respectively. Add 1 part of glass microspheres with a whiteness of 92%, and stir for 5 minutes under the condition of 200 r / min. Measure the L values ​​of each chromaticity parameter of the above-mentioned polymer composite material by a colorimeter, and record the hue parameter a*, b* value simultaneously; Obtain the hue value fluctuation range of the composite material with different carbon black contents, set up a database, see Table 1; The standard linear function model CB1=m1×L1+n1, CB2=m2×L2+n2, CB3=m3×L3+n3 is established by regression analysis, and the relationship between L value and carbon black content can be seen in Table 2;

[0060] Test group 1

[0061] Take 1 part of finished nylon 12 powder containing carbon black (in order to verify the accuracy of the test, ...

Embodiment 2

[0063] Calibration group 2

[0064] Take 1 part of nylon 6 materials with CB4, CB5 and CB6 carbon black contents of 1%, 2% and 3% respectively, add 2 parts of nylon 6 base material powder respectively, and stir for 5 minutes under the condition of 200r / min. Measure the Y value of each chromaticity parameter of the above-mentioned polymer composite material by a colorimeter, and record the hue parameter a*, b* value simultaneously; Obtain the fluctuation range of the hue value of the composite material with different carbon black contents, set up a database, see Table 3; The standard linear function model CB4=m4×Y4+n4, CB5=m5×Y5+n5, CB6=m6×Y6+n6 is established by regression analysis, and the relationship between the Y value and the carbon black content is shown in Table 4;

[0065] Test group 2

[0066] Take 1 part of finished nylon 6 powder containing carbon black (in order to verify the accuracy of the test, it is known that the type of carbon black is CB6 with a content of ...

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Abstract

The invention discloses a method for detecting carbon black in a polymer material for selective laser sintering. The method comprises the steps that adding white powder into a to-be-detected materialfor high-speed stirring, and obtaining a to-be-detected sample, wherein the weight ratio of the to-be-detected material to the white powder is 1: 1-19; measuring a hue value and chrominance parametersof the to-be-detected sample, firstly substituting the hue value into a pre-stored hue value database, and judging the type of carbon black of the to-be-detected sample according to the range of thehue value; inputting the chrominance parameters into a pre-stored standard function model corresponding to the carbon black kind of the to-be-detected sample so obtain the content of carbon black in the to-be-detected sample. According to the method for detecting the carbon black in the polymer material for selective laser sintering, carbon black combustion is not involved, so that the environmental pollution is avoided, namely, the environment is protected; the method is simple and easy to implement, the use difficulty of testers is reduced, and the test speed is high; in addition, the methodcan be used for evaluating the types of the carbon black and synchronously detecting the content of the carbon black.

Description

technical field [0001] The invention belongs to the technical field of additive manufacturing, and in particular relates to a method for detecting carbon black in polymer materials for selective laser sintering. Background technique [0002] Additive manufacturing is a technology that uses three-dimensional model data to manufacture objects in a layer-by-layer manner. Due to its unique advantages such as short production cycle in small batches, no excess tailings in production and high production flexibility, it has been favored by more and more manufacturing companies in recent years. s concern. Among them, selective laser sintering technology (SLS) has unique advantages such as simple manufacturing process, no support structure, and high material utilization rate. It has become one of the fastest-growing additive manufacturing technologies with industrial production capacity. [0003] As we all know, polymer is a common material for SLS, which can be sintered by absorbing...

Claims

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Application Information

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IPC IPC(8): G01N21/29
CPCG01N21/29Y02P10/25
Inventor 岳云豪苏雪雪陈锐敏司妞文杰斌
Owner HUNAN FARSOON HIGH TECH CO LTD
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