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FUSED DEPOSITION MODELING-BASED ADDITIVE MANUFACTURING PROCESS AT LOW TEMPERATURES

机译：低温下基于熔融沉积建模的增材制造过程

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A process for manufacturing an article comprises the steps of: I) applying a filament of an at least partially fused construction material to a support so as to obtain a layer of the construction material which corresponds to a first selected cross-section of the article; II) applying a filament of the at least partially fused construction material to a previously applied layer of the construction material so as to obtain a further layer of the construction material which corresponds to a further selected cross-section of the article and which is bonded to the previously applied layer; and III) repeating step II) until the article is formed. At least steps II) and III) are carried out in a chamber and the construction material comprises a fusible polymer. The fusible polymer has a fusion range (DSC, differential scanning calorimetry; 2nd heating at a heating rate of 5 K/min.) of ≥20° C. to ≤100° C. The fusible polymer further has a complex viscosity |η*| (determined by viscosity measurement in the melt using a plate-plate oscillating viscometer according to ISO 6721-10 at 100° C. and a shear rate of l/s) of ≥10 Pas to ≤1000000 Pas. Finally, the temperature inside the chamber is ≤50° C. The invention also relates to an article manufactured by the process according to the invention, to an article having a substrate and to an article bonded to the substrate, the article being in the form of an adhesive joint or varnish region, and to the use of a particular polyurethane in fused deposition modeling-based additive manufacturing processes.
机译：制造物品的方法包括以下步骤：I）将至少部分熔融的建筑材料的细丝施加到支撑物上，以获得与物品的第一选择横截面相对应的建筑材料层; II）将至少部分熔融的建筑材料的细丝施加到先前施加的建筑材料层上，以获得另一层建筑材料，其对应于制品的另一选定横截面并且粘结到先前应用的层; III）重复步骤II）直到形成制品。至少步骤II）和III）在室内进行，并且建筑材料包括可熔聚合物。所述可熔聚合物的熔融范围（DSC，差示扫描量热法;以5K / min的加热速率第二次加热）为-20℃至100℃。复数粘度|η* | （通过根据ISO 6721-10的板-板振荡粘度计在100℃和1 / s的剪切速率下通过熔体中的粘度测量来确定）为10Pas至100000000Pas。最后，腔室内的温度为＆＃x2264; 50℃。本发明还涉及通过根据本发明的方法制造的制品，具有基材的制品以及粘结至该基材的制品。以粘合剂接头或清漆区域的形​​式使用，以及在基于熔融沉积建模的增材制造工艺中使用特定的聚氨酯。

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