Method for making conduits having a shock absorbing shell
    1.
    发明授权
    Method for making conduits having a shock absorbing shell 失效
    用于制造具有震动吸收壳的导体的方法

    公开(公告)号:US5217667A

    公开(公告)日:1993-06-08

    申请号:US696617

    申请日:1991-05-07

    摘要: A concrete conduit is completely encased within a shell of a plastic resin such as polyethylene. The plastic shell functions to insulate the concrete conduit from mechanical shocks thereby preventing breakage and cracking of the conduit. The shell also effectively provides an impermeable barrier for water vapor and a smooth, relatively frictionless, surface for receiving electric cables, wires and the like. The conduit is made by preforming the shell, for example by rotational molding, and filling the shell with pourable cement through a filler hole in the shell. The filler hole can then be closed with a plug of the resin used to form the shell.

    摘要翻译: 混凝土管道完全包裹在塑料树脂如聚乙烯的外壳内。 塑料外壳的作用是使混凝土管道与机械冲击绝缘,从而防止导管断裂和破裂。 壳体还有效地为水蒸气和平滑的,相对无摩擦的表面提供了不可渗透的屏障,用于接收电缆,电线等。 导管是通过预先形成外壳,例如通过旋转成型制成的,并且通过壳体中的填充孔将可倾倒的水泥填充到外壳中。 然后可以用用于形成壳的树脂塞将封闭孔封闭。

    Method for rotationally molding a hollow article and article made thereby
    3.
    发明授权
    Method for rotationally molding a hollow article and article made thereby 失效
    用于旋转模制由其制成的中空制品和制品的方法

    公开(公告)号:US4214670A

    公开(公告)日:1980-07-29

    申请号:US971366

    申请日:1978-12-20

    摘要: A technique for the rotational molding of hollow articles having separate but structurally integral compartments is described. A mold in which the article is to be formed is provided with a cover between the mold cavities in which the article compartments are to be rotationally molded. The cover is selectively spaced from the mold wall so that a thermoplastic resin used to form the article can pass through the space between the cover and the mold wall to form the article walls for the compartments. The cover spacing from the mold wall is so selected that the build-up of the article's wall eventually seals off this spacing and enables further rotational molding of an article wall over the cover to isolate the compartments. In the specific embodiment, a technique for the rotational molding of a tank with legs below a bottom wall and a continuous uninterrupted interior bottom surface is described.

    摘要翻译: 描述了具有分开但结构整体的隔室的中空制品的旋转模制技术。 要在其中形成制品的模具在模腔之间设置有盖,所述模腔中的物品隔室将被旋转模制。 盖子与模具壁选择性地间隔开,使得用于形成制品的热塑性树脂可以穿过盖子和模具壁之间的空间,以形成隔间的制品壁。 与模具壁的盖间距如此选择,使得制品的壁的积聚最终密封该间隔,并使得物品壁能够在盖上方进一步旋转模制以隔离隔间。 在具体实施例中,描述了一种用于在底壁和连续的不间断的内部底表面下方旋转模制具有腿的罐的技术。

    Molding system and article
    9.
    发明授权
    Molding system and article 失效
    成型系统和制品

    公开(公告)号:US4397247A

    公开(公告)日:1983-08-09

    申请号:US296065

    申请日:1981-08-25

    摘要: A molding system for molding hollow bodies and an article, such as a pallet, produced by means of such system. In a preferred form, the pallet is a rectangular parallelepiped hollow molding and is specifically shaped during molding, to be substantially stiffened by means of its shape and to receive and support one or more blades of a lifting and handling device. In one form, one or more stiffening members extend across the hollow molding and are retained therein as a result of having the molding material molded about the stiffening members. In another form, two stiffening members are provided, each extending along a respective border portion of the hollow molding parallel to the other stiffening member. The invention is also concerned with a method for molding large hollow bodies by means of a fast setting resin which is premixed just before it is introduced into a mold.

    摘要翻译: 用于模制中空体的模制系统和通过这种系统制造的诸如托盘的物品。 在优选的形式中,托盘是长方体的中空模制件,并且在模制过程中被特别地成形,以便通过其形状基本上加固并且接收和支撑提升和处理装置的一个或多个叶片。 在一种形式中,一个或多个加强构件延伸穿过中空模制件并且由于模制材料围绕加强构件模制而保持在其中。 在另一种形式中,设置两个加强构件,每个加强构件均沿着平行于另一个加强构件的中空模制件的相应边界部分延伸。 本发明还涉及通过快速固化树脂来模制大型中空体的方法,该快速固化树脂在其被引入模具之前被预混合。

    Method of molding a re-enforced article
    10.
    发明授权
    Method of molding a re-enforced article 失效
    模制再强化制品的方法

    公开(公告)号:US4285902A

    公开(公告)日:1981-08-25

    申请号:US965142

    申请日:1978-11-30

    申请人: Joseph Braverman

    发明人: Joseph Braverman

    摘要: A method of molding an article between a pair of spaced molded walls comprises the steps of releasably attaching a first member to one mold wall, releasably attaching a second member to the other mold wall in alignment with but spaced from the first member, connecting the two spaced members together by a yielding connection, and introducing heated molding material between the two mold walls, whereby when the molded article cools, the yielding connection yields to accommodate shrinkage deformation of the article. Also described is apparatus for use in performing the above method.

    摘要翻译: 在一对间隔开的模制壁之间模制物品的方法包括以下步骤:将第一构件可释放地附接到一个模具壁,将第二构件可释放地附接到与第一构件对准但与第一构件间隔开的另一个模具壁,将两个 间隔的构件通过屈服连接在一起,并且在两个模具壁之间引入加热的模制材料,由此当模制品冷却时,屈服连接产生以适应制品的收缩变形。 还描述了用于执行上述方法的装置。