摘要:
Die Erfindung betrifft mehrere pulverförmige Zusammensetzungen auf der Grundlage von thermoplastischen Kunststoffen wie Copolyamid (CoPA), Niederdruckpolyethylen (HDPE), Copolyester (CoPES), Polyurethan (TPU) und Polypropylen (PP) zur Verwendung bei der Herstellung von dreidimensionalen Formkürpern in schichbmeiser Fertigung. Die Zusammensetzungen enthalten wenigstens ein thermoplastisches Kunststoffpulver und ist dadurch gekennzeichnet, dass das Kunststoffpulver einen Schmelzpunkt von unter 155 °C und einen Schmelzflussindex bei 160 °C (2.16 kg) von 1 bis 50 g/10 min. aufweist.
摘要:
The present invention relates to an improved method for grinding poly(arylene ether ketones), enabling excellent yield and the production of poly(arylene ether ketone) powders having an average particle diameter of less than 100 µm and a narrow size distribution with few fine particles (Dv10>15µm).
摘要:
The invention relates to an apparatus for preprocessing and subsequently conveying or plasticizing plastics, comprising a container (1) with a mixing and/or comminuting tool (3) that can rotate about a rotational axis (10), wherein an opening (8) is formed in a lateral wall (9) through which the plastic material can be discharged and a conveyor (5) is provided with a screw (6) rotating in a housing (16). The invention is characterized in that the imaginary extension of the longitudinal axis (15) of the conveyor (5) passes by the rotational axis (10) counter the conveying direction (17), wherein the longitudinal axis (15) is on the outlet side offset by a distance (18) in relation to the radial (11) that is parallel to the longitudinal axis (15). The smallest possible distance (ms) between the tool (3) and the crew (6) is defined by the following relationship: ms ≤ k * d + K, wherein d... is the diameter of the screw (6) in mm, K is a factor ranging from 20 to 100, in particular 20 to 80, k is a factor ranging from 0.03 to 0.4, in particular 0.04 to 0.25.
摘要翻译:本发明涉及一种用于预处理和随后输送塑化塑料的设备,该设备包括具有可绕旋转轴线(10)旋转的混合和/或粉碎工具(3)的容器(1),其中开口(8) 形成在塑料材料可以通过其排出的侧壁(9)中,并且传送器(5)设置有在壳体(16)中旋转的螺钉(6)。 本发明的特征在于,输送机(5)的纵向轴线(15)的假想延伸部分逆着输送方向(17)经过旋转轴线(10),其中纵向轴线(15)位于输出侧 相对于平行于纵向轴线(15)的径向(11)偏移距离(18)。 工具(3)和工作人员(6)之间的最小可能距离(ms)由以下关系定义:ms≤k* d + K,其中d ...是螺杆(6)的直径,单位为mm K是20至100,特别是20至80的因子,k是0.03至0.4,特别是0.04至0.25的因子。
摘要:
The invention relates to an apparatus for preprocessing and subsequently conveying or plasticizing plastics, comprising a container (1) with a mixing and/or comminuting tool (3) that can rotate about a rotational axis (10), wherein an opening (8) is formed in a lateral wall (9) through which the plastic material can be discharged and a conveyor (5) is provided with a screw (6) rotating in a housing (16). The invention is characterized in that the imaginary extension of the longitudinal axis (15) of the conveyor (5) passes by the rotational axis (10) counter the conveying direction (17), wherein the longitudinal axis (15) is on the outlet side offset by a distance (18) in relation to the radial (11) that is parallel to the longitudinal axis (15). The length/diameter ratio of the screw (6) is ≥ 7, and the effect of compression of the screw (6) starts only at a distance (A) of more than 1.5 times the diameter (d) of the screw (6).
摘要:
To improve the features of infill material (40) made from rubber granules (30), preferably recycled, a process is described characterized by stretching opposite sides of the granules with different tangential velocities (F2, F2). The shape of the granule is modified, rendering it expanded.