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    • 7. 发明专利
    • Injection molding method of article having sandwich construction
    • 具有三维建筑物的注射成型方法
    • JPS59109335A
    • 1984-06-25
    • JP21784582
    • 1982-12-14
    • Ube Ind Ltd
    • TAKAYAMA SEIZOUMIZUTA ISAMU
    • B29C35/00B29C45/00B29C45/14B29C45/16B29K9/00B29K105/04
    • B29C44/0461B29C45/1645
    • PURPOSE:To mold an article having a dense surface and a sufficiently foamed inside part, by a method wherein only a undegassed resin is used, a portion thereof is degassed prior to injection to produce a skin layer, and a core layer is produced by using the undegassed resin as it is. CONSTITUTION:A resin stored in a screw head 4 in a heated cylinder 1 is injected into a cavity 12 of a metallic mold 9, then the pressure in a space 15 provided at a front part of the head 4 is lowered to a negative pressure by retracting a screw 2, and a shut-off valve provided at an intermediate part of a passage extended from a vacuum source 5 to the space 15 is opened to reduce the pressure. Under the reduced pressure, a predetermined quantity of a resin containing a foaming gas is supplied into the space 15 in a string form or a sheet form, thereby degassing the resin. Then, the valve 7 is closed, the foaming gas containing resin is plasticized, the quantity thereof is measured, and the degassed resin and the foaming gas containing resin are injected together with each other by a single injecting action.
    • 目的:为了模制具有致密表面和内部充分发泡的制品,通过其中仅使用未脱气的树脂的方法,将其一部分在注射之前脱气以产生表皮层,并且通过使用 未脱气的树脂。 构成:将储存在加热缸1中的螺杆头4中的树脂注入金属模具9的空腔12中,然后将设置在头部4的前部的空间15中的压力降低到负压 缩回螺杆2,并且设置在从真空源5延伸到空间15的通道的中间部分处的截止阀被打开以降低压力。 在减压下,将预定量的含有发泡气体的树脂以串形或片状形式供给到空间15中,从而使树脂脱气。 然后关闭阀门7,将发泡气体树脂塑化,测定其量,将脱气后的树脂和发泡气体的树脂通过一次注入动作相互注入。
    • 8. 发明专利
    • Manufacture of synthetic resin molding
    • 合成树脂成型的制造
    • JPS592822A
    • 1984-01-09
    • JP11080882
    • 1982-06-29
    • Ube Ind Ltd
    • TACHIBANA TERUOYAMAGUCHI MASAHIKOARAI TOSHIO
    • B29C45/50B29C43/00B29C44/04B29C45/00B29C45/16B29C45/77B29K105/04
    • B29C44/04B29C45/1645
    • PURPOSE:To obtain a low density synthetic resin molding high in the smoothness of the surface by injection molding of a foaming synthetic resin composition on a specified condition with an injection molding mainly composed of a cylinder and a screw. CONSTITUTION:After the tip 13 of a cylinder is closed, a small amount of a foaming synthetic resin composition is left in a space between the inner wall of a cylinder and the surface of a screw head and a screw 12 is retracted to effect a defoaming. Then, after the cylinder tip is opened, the screw advances to discharge the resin composition 31 and the defoamed gas 32 outside the system and after the cylinder tip is closed, the filling of a foaming synthetic resin composition 19 is done anew. Then, after the tip of the cylinder is opened, the screw 12 advances and injects the defoamed synthetic resin composition and the foaming synthetic resin composition 19 sequentially into a mold 21 to complete the foaming and the molding. Thus, a synthetic resin molding having a skin layer 22 and a core layer 23 can be obtained.
    • 目的:通过使用主要由圆筒和螺杆构成的注射成型,通过在特定条件下注射成型发泡性合成树脂组合物,获得表面光滑度高的低密度合成树脂。 构成:在气瓶的尖端13关闭之后,少量的发泡合成树脂组合物留在圆筒的内壁和螺钉头的表面之间的空间中,螺杆12缩回以实现消泡 。 然后,在气瓶顶端打开之后,螺杆前进,将树脂组合物31和脱泡气体32排出系统外部,并且在气缸盖关闭之后,重新填充发泡合成树脂组合物19。 然后,在气瓶的顶端打开之后,螺杆12将脱泡的合成树脂组合物和发泡合成树脂组合物19顺序地进入并注射到模具21中,以完成发泡和模制。 因此,可以获得具有表皮层22和芯层23的合成树脂成型体。