Method for crimping a thermoplastic resin member
    9.
    发明授权
    Method for crimping a thermoplastic resin member 失效
    压缩热塑性树脂部件的方法

    公开(公告)号:US5695704A

    公开(公告)日:1997-12-09

    申请号:US610767

    申请日:1996-03-04

    摘要: Provided is a method for crimping a thermoplastic member which allows a first member made of thermoplastic resin to be mounted on a second member at a high mounting strength without complicating the fabrication process and without causing any reduction in the production efficiency. After an entire portion of the first member that is to be crimped is thermally melted or softened, the portion is deformed and crimped by using a crimping die having a die surface which is at a temperature lower the melting point of the thermoplastic resin. Therefore, the deformed portion is given with a uniform internal structure free from internal defects such as cracks and interfaces. Because the interior of the crimped portion remains to be hot as compared to the surface portion which is in contact with the crimping die during the crimping process, a certain pattern of internal stress is produced in the internal part which opposes the internal stress of the surface portion as the deformed portion cools and contracts. Therefore, warping of the crimped portion can be avoided, and the thermoplastic resin member can be mounted on the second member at a high mounting strength without complicating the fabrication process and without causing any reduction in the production efficiency.

    摘要翻译: 提供一种压缩热塑性构件的方法,其允许以热塑性树脂制成的第一构件以高安装强度安装在第二构件上,而不会使制造过程复杂化,并且不会导致生产效率的降低。 在要卷曲的第一部件的整个部分被热熔化或软化之后,通过使用具有低于热塑性树脂的熔点的模具表面的压接模具来使部分变形和卷曲。 因此,变形部分具有没有内部缺陷如裂纹和界面的均匀内部结构。 由于与在压接过程中与压接模具接触的表面部分相比,卷曲部分的内部保持热,因此在与表面的内部应力相反的内部部分中产生一定的内部应力模式 部分随着变形部分的冷却和收缩。 因此,可以避免翘曲部分翘曲,并且可以以高的安装强度将热塑性树脂构件安装在第二构件上,而不会使制造过程复杂化,并且不会导致生产效率的降低。

    Method and apparatus for differential softening of thermoformable plastic
    10.
    发明授权
    Method and apparatus for differential softening of thermoformable plastic 失效
    可热成型塑料差示软化的方法和装置

    公开(公告)号:US5237796A

    公开(公告)日:1993-08-24

    申请号:US897890

    申请日:1992-06-12

    申请人: Lorne Bonkowski

    发明人: Lorne Bonkowski

    摘要: The present invention provides a method and apparatus for differentially softening plastic used to package articles. Select areas of the sheet are selectively softened by treating those areas to allow either increased or decreased softening of the sheet in response to radiation absorption. The treatment can include the application of coating materials to the select areas or the lamination of different types of plastics. In the illustrated embodiment, heat is applied to the sheet by use of a infrared radiation source. Either before or after the sheet has been softened in the areas, the sheet is positioned adjacent to a forming plate for stretch forming the sheet. The plate causes the softened areas of the sheet, along with any unsoftened areas bordering the softened areas, to be drawn and stretched over and around the surface of the article intended to be covered or held. The softened portions of the sheet are then allowed to cool to their unsoftened, relatively rigid state, resulting in a carrier that covers the top and sides of each article.

    摘要翻译: 本发明提供了用于对用于包装物品的塑料进行差分软化的方法和装置。 通过处理这些区域来选择性地软化片材的区域,以允许响应于辐射吸收而增加或减少片材的软化。 处理可以包括将涂料施加到选择区域或层压不同类型的塑料。 在所示实施例中,通过使用红外辐射源将热量施加到片材上。 在片材在区域中软化之前或之后,片材邻近成形板定位以拉伸成形片材。 板材使得片材的软化区域以及与软化区域接壤的任何未软化区域被拉伸并拉伸在旨在被覆盖或保持的制品的表面上和周围。 然后将片材的软化部分冷却至未软化的相对刚性状态,导致覆盖每个制品的顶部和侧面的载体。