Twin screw extruder with conical non-parallel converging screws

    公开(公告)号:US20030210605A1

    公开(公告)日:2003-11-13

    申请号:US10456248

    申请日:2003-06-05

    IPC分类号: B29B007/48

    摘要: An improved twin screw extruder device (14) is provided which is capable of producing a wide variety of high quality extrudates having greatly varying final properties, without the need for extensive machine modifications. The extruder (14) includes a barrel (16) together with a co-rotating twin screw assembly (22). The assembly (22) is made up of a pair of screws (50, 52) having central, tapered shafts (54, 56) equipped with outwardly extending helical flighting (58, 60); the screws (50, 52) are non-parallel and are positioned so that the flighting (58, 60) thereof is intercalated along the length of the screws (50, 52). The flighting is of specialized configuration and tapers along the length of the screws (50, 52) preferably at an angle of taper different than that of the shafts (54, 56); moreover, the width of the outer flighting surfaces (70, 72) increases along the length of the shafts (54, 56). This screw geometry defines a series of alternating upper and lower close-clearance high-pressure nip areas (78) defined by the flighting (58, 60) which serves to propel an extrudable mixture forwardly towards the outlet end (20) of the barrel (16). However, passageways (80) and kneading zones (82) are also defined between the screws (50, 52), which assures full mixing, shearing and cooking of the material. The extruder device (14) is capable of producing high density sinking aquatic feeds as well as expanded, low density products merely by changing the rotational speed of the screws (50, 52) together with appropriate temperature control. In another embodiment, a fluid extraction extruder (138) is provided having a specialized extruder head (140) including an outer shell (144) and an inner, elongated, slotted sleeve (152).

    SCREW TO BE USED IN AN EXTRUDER AND EXTRUDER
    23.
    发明申请

    公开(公告)号:US20180104879A1

    公开(公告)日:2018-04-19

    申请号:US15786914

    申请日:2017-10-18

    IPC分类号: B29C47/60 B29C47/66

    摘要: A screw to be used in an extruder has a modular structure so that it can be adapted very flexibly to new tasks and conditions. The modular structure of a screw contains a rod-shaped mandrel and individual screw components which are slidable onto the mandrel. The components perform the classic functions of the screw during the extrusion process, such as conveying, kneading, mixing or shearing of the plastic to be guided into and through the plant.For transmission of the occurring high torque, the components are connected with the mandrel so that they positively engage and are axially braced in addition. The connection is to be performed such that it can be released by simple means.

    METHOD FOR MANUFACTURING LIQUID CRYSTAL POLYESTER MOLDED BODIES
    27.
    发明申请
    METHOD FOR MANUFACTURING LIQUID CRYSTAL POLYESTER MOLDED BODIES 审中-公开
    制造液晶聚酯模塑体的方法

    公开(公告)号:US20140001678A1

    公开(公告)日:2014-01-02

    申请号:US14005468

    申请日:2012-03-13

    IPC分类号: B29C45/00

    摘要: A method is provided for manufacturing a liquid crystal polyester molded body by molding a liquid crystal polyester composition using a molding machine containing a cylinder, a screw and a heater. The screw is provided inside the cylinder, and is composed of a feed section, a compression section, and a metering section, the feed section and the compression section of the screw are composed of a single flight, the heater is provided on the outer periphery of the cylinder. The liquid crystal polyester composition contains a liquid crystal polyester and a polyamide resin. The method for manufacturing the polyester molded body includes: a step of melting and metering the liquid crystal polyester composition, a step of tightening a mold and performing mold clamping, a step of injecting the melted liquid crystal polyester composition into the mold, and a step of extracting the solidified resin from inside the mold.

    摘要翻译: 提供一种通过使用含有圆筒,螺杆和加热器的成型机成型液晶聚酯组合物来制造液晶聚酯成型体的方法。 螺杆设置在气缸内部,由进给部,压缩部和计量部构成,螺杆的进给部和压缩部由单个飞行构成,加热器设置在外周 的气缸。 液晶聚酯组合物含有液晶聚酯和聚酰胺树脂。 聚酯成型体的制造方法包括:熔融并计量液晶聚酯组合物的步骤,将模具拉紧并进行合模的步骤,将熔融的液晶聚酯组合物注入到模具中的步骤,以及步骤 从模具内部提取固化树脂。

    EXTRUDER ASSEMBLY WITH ALTERNATING CONVERGING AND DIVERGING BARREL SECTIONS
    28.
    发明申请
    EXTRUDER ASSEMBLY WITH ALTERNATING CONVERGING AND DIVERGING BARREL SECTIONS 审中-公开
    挤出机组件与替代的混合和分流棒部分

    公开(公告)号:US20100260882A1

    公开(公告)日:2010-10-14

    申请号:US12420740

    申请日:2009-04-08

    IPC分类号: B29B7/30

    摘要: High-capacity extrusion die assemblies (20, 90, 130, 140, 180, 252) each having a tubular sections (44, 146, 162, 268) and an elongated, axially rotatable, helically flighted screw section (56, 56a, 152, 168, 276, 278) which cooperatively define frustoconical, outwardly diverging material flow paths (75, 160, 291) at constant or differing divergence angles of from about 1-11°. The use of diverging tubular sections (44, 146, 162, 268) and screw sections (56, 56a, 152, 168, 276, 278) permits the use of larger die plates (76, 118, 292) with an increased number of die openings (80, 124, 296). This allows significant increases in extrusion production rates. The die assemblies (20, 90, 130, 140, 180, 252) can be used in the production of a wide number of human foods or animal feeds, and particularly aquatic feeds of the floating or sinking variety. In another aspect of the invention, an extruder (210) is provided having diverging and converging sections (212, 214) along the length thereof and defining corresponding flow paths (230, 246).

    摘要翻译: 每个具有管状部分(44,146,162,268)和细长的,可轴向旋转的螺旋螺旋部分(56,56a,152)的大容量挤出模头组件(20,90,130,140,​​180,252) ,168,276,278),其以约1-11°的恒定或不同的发散角协作地限定截头圆锥形的向外发散的材料流动路径(75,160,291)。 使用发散的管状部分(44,146,162,268)和螺旋部分(56,56a,152,168,276,278)允许使用较大的模板(76,118,292),其具有增加数量的 模具开口(80,124,296)。 这样可以显着提高挤出生产率。 模具组件(20,90,130,140,​​180,252)可以用于生产大量人类食物或动物饲料,特别是浮动或下沉品种的水生饲料。 在本发明的另一方面,提供一种挤出机(210),其具有沿其长度的发散和会聚部分(212,214),并限定相应的流动路径(230,246)。

    METHOD OF MANUFACTURING THERMOPLASTIC RESIN FILM
    30.
    发明申请
    METHOD OF MANUFACTURING THERMOPLASTIC RESIN FILM 审中-公开
    制造热塑性树脂薄膜的方法

    公开(公告)号:US20080237903A1

    公开(公告)日:2008-10-02

    申请号:US12058727

    申请日:2008-03-30

    申请人: Akira Yamada

    发明人: Akira Yamada

    IPC分类号: B29D11/00 B29C43/02

    摘要: A method of manufacturing a thermoplastic resin film, comprising the steps of: discharging a molten thermoplastic resin in film form from a die; and conveying the discharged film by a plurality of multi-staged cooling rollers with the discharged film contacting the rollers to cool the discharged film at multiple stages, wherein the temperature of surface of a first cooling roller out of the plurality of cooling rollers provided at multiple stages, the first cooling roller being positioned at the most upstream side in the direction in which the film is conveyed, ranges from the glass-transition temperature (Tg) of the thermoplastic resin−40° C. or higher to Tg+30° C. or lower.

    摘要翻译: 一种制造热塑性树脂膜的方法,包括以下步骤:从模具中排出膜状熔融热塑性树脂; 并且通过多个多级冷却辊输送排出的膜,排出的膜与辊接触以在多个阶段冷却排出的膜,其中第一冷却辊的表面的温度设置在多个冷却辊中 第一冷却辊位于膜的输送方向的最上游侧,从热塑性树脂的玻璃化转变温度(Tg)〜40℃以上至Tg + 30℃ 或更低。