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    • 70. 发明申请
    • APPARATUS AND METHOD FOR MULTI-LAYER INJECTION MOLDING
    • 多层注射成型的装置和方法
    • WO00054956A1
    • 2000-09-21
    • PCT/IB2000/000305
    • 2000-03-17
    • B29C45/28B29B11/08B29C45/16B29C45/27B29K23/00B29K67/00B29L9/00B29L22/00B65D1/00
    • B29C45/1607B29C45/1646B29C2045/1614B29C2045/273
    • An injection molding apparatus and method for muli-layer molding of preforms and closures has a central melt channel (78), an annular melt channel (76) radially spaced from the central melt channel (78), and an annular ring channel (106) surrounding the central melt channel (78). The central melt channel (78) has a first portion (108) for flow of a first material (200), a second portion (104) for flow of the first material (200) and a second material (300), and a flow extension (105) connecting the first portion (108) and the second portion (104). The flow extension (105) has a flow opening (109) in communication with the annular ring channel (106) for flow of the second material (300). The apparatus and method also include a cavity (36) for receiving flow of the first material (200) and the second material (300) from the central melt channel (78), and for receiving flow of the first material (200) from the annular melt channel (76). In addition, the apparatus and method include a melt passage (42) having a first melt portion (44) in communication with the central melt channel (78), and a second melt portion (43) in communication with the annular melt channel (76).
    • 一种用于预成型件和封闭件的多层成型的注射成型设备和方法,具有中心熔体通道(78),与中心熔体通道(78)径向间隔开的环形熔体通道(76)和环形环通道(106) 围绕中心熔体通道(78)。 中心熔体通道(78)具有用于第一材料(200)流动的第一部分(108),用于第一材料(200)和第二材料(300)流动的第二部分(104) 连接第一部分(108)和第二部分(104)的延伸部(105)。 流动延伸部(105)具有与环形环通道(106)连通的用于第二材料(300)流动的流动开口(109)。 所述装置和方法还包括用于从中心熔体通道(78)接收第一材料(200)和第二材料(300)的流动的腔(36),并且用于从第一材料(200) 环形熔体通道(76)。 另外,该装置和方法包括一个熔体通道(42),它具有与中心熔体通道(78)连通的第一熔化部分(44)和与环形熔体通道(76)连通的第二熔化部分(43) )。