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Polymer powder comprising polyamide use thereof in a moulding method and moulded body made from said polymer powder

A technology of polyamide powder and formed body, which is applied in the field of formed body based on powder forming material and layer-by-layer processing method, can solve problems such as deviation, and achieve good dimensional accuracy, good mechanical properties, and good surface quality. Effect

Active Publication Date: 2010-12-29
EVONIK OPERATIONS GMBH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The naturally unavoidable conduction and radiation of heat from the melting zone lead to more or less deviations of the shaped body from the intended structure

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0046] The 400kg is not adjusted by the hydrolysis aggregation and the relative solution viscosity is 1.62 and the end -based content is 75mmol / kg cooh or 69mmol / kg NH 2 The PA12 and 2500L of ethanol with 2-butanol and 1 % water-modified ethanol can be changed within 5 hours and at 3M 3 Heated to 145 ° C in the mixing kettle (A = 160cm), and keeps this temperature under the mixing conditions (paddle mixer, x = 80cm, rotation = 49upm).Then reduce the set temperature to 124 ° C. While continuously steaming ethanol and reducing the internal temperature to 125 ° C with a cooling speed of 25K / h and at the same stirring rotation.Starting at this moment, keep the set temperature below 2K-3K at the same cooling rate.At a same cooling rate, reduce the internal temperature to 117 ° C, and then keep it constant for 60 minutes.Then, distille at 40K / h and make the internal temperature reach 111 ° C.Settlement starts at this temperature, which can be identified by heat.Improve the distillation ...

Embodiment 2

[0050] According to the Example 1, the PA1010-sample obtained from 1,10-diocyline and citrinic acid is precipitated. It has the following characteristic data: η rel = 1.84, [COOH] = 62mmol / G, [NH 2 ] = 55mmol / kg.

[0051] Compared to Example 1, the precipitation conditions are modified as follows:

[0052] Settlement temperature: 120 ° C, precipitation time: 2 hours, mixer rotor: 90upm

[0053] Packing density: 417g / L

[0054] Filter analysis: <32 μm: 6.0 weight % %

[0055] <45 μm: 8.5 weight % %

[0056] <63 μm: 23.5 weight % % %

[0057] <100 μm: 96.1 weight % % %

[0058] <160 μm: 99.7 weight % % %

[0059]<200 μm: 99.9 weight % %

[0060] <250 μm: 100.0 weight % % % %

[0061] Example 3: One step of PA1012 (according to the present invention)

Embodiment 3

[0062] According to the Example 1, the PA1012-granular sample obtained from 1,10-zinylramine and dulate dilate is accumulated again. It has the following characteristic data: η rel = 1.76, [COOH] = 46mmol / G, [NH 2 ] = 65mmol / kg.

[0063] Compared to Example 1, the precipitation conditions are modified as follows:

[0064] Soluble temperature: 155 ° C, precipitation temperature: 123 ° C, precipitation time: 40 minutes, mixer rotation: 110upm

[0065] Packing density: 510g / L

[0066] Filter analysis: <32 μm: 0.2 weight % %

[0067] <100 μm: 44.0 weight % % %

[0068] <250 μm: 99.8 weight % % %

[0069] Example 4: One step of PA1012 (according to the present invention)

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Abstract

To provide a valve opening / closing timing control device having simple construction for giving relative rotation to a driving rotor and a driven rotor. The valve opening / closing timing control device comprises a first guide 33 formed on a driving plate 30 which is rotated integrally with a crank shaft 120, a second guide 23 formed on a driven plate 20 which is rotated integrally with a cam shaft10, a movable head 60 to be guided in engagement with both guides 33, 23, and a guide plate 50 on which a third guide 53 is formed for guiding the head 60 in engagement. The guide plate 50 is rotatedrelative to the driving plate 30 and the driven plate 20 for displacing the head 60 to give relative rotation to the driving plate 30 and the driven plate 20.

Description

Technical field [0001] Quickly producing models is a task that has been proposed recently.It is particularly appropriate to be based on the method of forming materials, which is made of the required structure through selective melting and solidification in this method.In this process, the support structure of hanging and bottom -cut can be saved, because the powder bed wrapped in the melting area is enough to provide support.The same can be eliminated to remove the post -processing steps of the support body.This method is also suitable for small batch production products. Background technique [0002] The present invention involves a polymer powder based on XY -type polyamide, which is preferably XY type polyamide made by dibamine and di carboxylic acid reaction, which involves the application of the powder in the forming method, and the use of this typeThe formation is made by the pink and the formation method made by the layer -by -layer processing method that can selectively m...

Claims

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Application Information

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IPC IPC(8): C08G69/02C08J3/14C09D177/00C08L77/06
CPCC08L77/06B29C67/0077B29C64/153B33Y70/10C08J3/12C08G69/00C09D177/00C08G69/02
Inventor S·蒙谢默F·-E·鲍曼M·格雷比J·洛马
Owner EVONIK OPERATIONS GMBH
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