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    • 8. 发明申请
    • APPARATUS FOR STRETCHING EXTRUDED PLASTIC STRIPS, FOR EXAMPLE OF POLYPROPYLENE OR OF POLYETHYLENE, FOR THE PRODUCTION OF STRAPS, RAFFIA OR OTHER TYPES OF STRIPS
    • 用于拉伸挤出塑料条的装置,用于聚丙烯或聚乙烯的实例用于生产条纹,拉条或其他类型的条带
    • WO2006067066A1
    • 2006-06-29
    • PCT/EP2005/056704
    • 2005-12-12
    • S.I.M.A. Società Industrie Meccaniche Affini a r.l.BOCCAFOGLI, Sergio
    • BOCCAFOGLI, Sergio
    • B29C55/06B29C35/06
    • B29C55/06B29C35/06B29C2035/046B29K2023/06B29K2023/12
    • The stretching oven (B), positioned between the upstream and downstream pulling groups (A, A'), is of a limited length, between 3000 and 4000 mm, for example about 3300 mm and is provided with suitable thermal insulation (32) against the exterior. Hot air is blown into the longitudinal treatment chamber (17) of said oven for plasticizing the strips that are to be stretched, with first opposite blowing mouths (25, 125) arranged at one end of the treatment chamber (17) of said oven, preferably at the door (16) where the strips to be treated enter, and with at least second opposite blowing mouths (27, 127) always operating in parallel flow in an intermediate portion of said treatment chamber, which at the other end, at the exit door (116), has two opposing pairs of suction mouths connected to fans (19, 119) which collect the hot air from said treatment chamber and send it to said blowing mouths (25, 125, 27, 127) through channels in which heating units (28, 128, 29, 129) are arranged, controlled selectively by suitable temperature sensors (30, 31, 130, 131) and by suitable regulating and controlling means.
    • 位于上游和下游牵引组(A,A')之间的拉伸炉(B)的长度限制在3000至4000mm之间,例如约3300mm,并且具有适当的隔热(32),抵抗 外观。 将热空气吹入所述烘箱的纵向处理室(17),以使待拉伸的条带塑化,其中布置在所述烤箱的处理室(17)的一端处的第一相对的吹口(25,125) 优选地在待处理的条带进入的门(16)处,并且至少第二相对的吹口(27,127)总是在所述处理室的中间部分中平行流动地操作,在另一端处于 出口门(116)具有连接到风扇(19,119)的两对相对的吸嘴,该风扇收集来自所述处理室的热空气,并通过其中的通道将所述吸入口发送到所述吹口(25,125,27,227) 加热单元(28,128,29,129)被布置成由适当的温度传感器(30,31,130,131)和适当的调节和控制装置选择性地控制。