The utility model discloses a expansion die for a heat-shrinkable sleeve, which comprises a mold body composed of at least two knots of a mold. The sub-mold is provided with a sleeve opening and a vacuum cavity is arranged in the sub-mold. The vacuum cavity is located between the outer wall of the sleeve and the side wall of the sub-mold, and a cooling cavity is also provided in the sub-mold, which is located in a vacuum. Between the outer wall of the cavity and the side wall of the sub-mould, the side wall of the sub-mould is provided with a water inlet and a water outlet connected with the cooling cavity, and the side wall of the sub-mould is provided with a vacuum opening connected with the vacuum cavity. The vacuum chamber and the cooling chamber are arranged side by side to ensure that the casing is quickly cooled and finalized after expanding, and to a certain extent, the problems of different expanding time and inner diameter of the casing are solved, and the expansion is more stable.
【技术实现步骤摘要】
一种热缩套管扩张模具
本技术属于热缩套管的加工
,具体地说是一种直径较小的热缩套管扩张模具。
技术介绍
热缩套管的生产需要经过造粒、辐照、挤出、扩张等几道工序。扩张工段又有油扩、干扩之分。目前通常采用真空扩张法进行扩张。在管材内部通入较小的压缩空气,当加热的管材通过扩张模具时,在模具内壁与管材外部之间抽真空,使得管材内部与外部造成一定的压力差,在内外压力差的作用下,管材被扩张紧贴模具内壁,当管材接触到模具内壁时被冷却定型,便得到所需制品。制品的大小、壁厚、形状、开机速度等与扩张模具直接相关。现用的扩张模具有质量不稳定,开机速度慢等问题。
技术实现思路
本技术要解决的技术问题是提供一种热缩套管扩张模具,将真空腔和冷却腔左右并排设置,保证套管起扩后迅速冷却定型,一定程度上解决了套管起扩延时和内径不一的问题,扩张更为稳定。为了解决上述技术问题,本技术采取以下技术方案:一种热缩套管扩张模具,包括模具体,所述模具体由至少两节子模具构成,该子模具设有套管口,子模具内设有真空腔,该真空腔位于套管外壁与子模具的侧壁之间,子模具内还设有冷却腔,该冷却腔位于真空腔外壁与子模具的侧壁 ...
【技术保护点】
1.一种热缩套管扩张模具,包括模具体,其特征在于,所述模具体由至少两节子模具构成,该子模具设有套管口,子模具内设有真空腔,该真空腔位于套管外壁与子模具的侧壁之间,子模具内还设有冷却腔,该冷却腔位于真空腔外壁与子模具的侧壁之间,子模具的侧壁设有与冷却腔连通的进水口和出水口,子模具的侧壁设有与真空腔连通的真空口。
【技术特征摘要】
1.一种热缩套管扩张模具,包括模具体,其特征在于,所述模具体由至少两节子模具构成,该子模具设有套管口,子模具内设有真空腔,该真空腔位于套管外壁与子模具的侧壁之间,子模具内还设有冷却腔,该冷却腔位于真空腔外壁与子模具的侧壁之间,子模具的侧壁设有与冷却腔连通的进水口和出水口,子模具的侧壁设有与真空腔连通的真空口。2.根据权利要求1所述的热缩套管扩张模具,其特征在于,所述真空腔上设...
【专利技术属性】
技术研发人员:李兴光,陈鹏,杨焕培,陈国强,
申请(专利权)人:东莞三联热缩材料有限公司,
类型:新型
国别省市:广东,44
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