The invention relates to the processing technology of plastic packaging bottles, aiming at providing a bottle embryo with two straight-line embryo bodies. The bottle embryo is formed by injection moulding, including the mouth, transition region, body and bottom of the bottle embryo; the body of the bottle embryo consists of the upper straight-line bottle embryo body, the lower straight-line bottle embryo body and the transitional section of the bottle body located in the middle. The whole bottle embryo is in the shape of a bullet head, and the arc between the lower straight-line bottle embryo body and the bottom of the bottle embryo is in phase. Transition is achieved by cutting method; the axial sections of the embryo body of two straight-line bottles are both two straight lines, and the angle formed by them is used as the demoulding angle, and arc transition is used. The invention can control the distribution of the bottle body material in the manufacturing process, ensure the wall thickness of a section on the bottle, and thus ensure the structural performance of the bottle. Because the second diameter of the bottle embryo body is smaller, the maximum diameter of the bottle embryo bottom is also smaller. Compared with the ordinary straight-line bottle embryo structure, the bottle embryo bottom can save material, which depends on the ratio of the diameter of the two bottle embryo bodies.
【技术实现步骤摘要】
一种具有两段直线型胚身的瓶胚
本专利技术是关于塑料包装瓶的加工技术,特别涉及一种具有两段直线型胚身的瓶胚。
技术介绍
塑料包装瓶的加工一般都是先用注塑机注塑成瓶胚,再由吹瓶机将瓶胚吹塑成型。瓶胚通常都由瓶口、过渡区域、瓶胚身和瓶胚底组成。在现有塑料包装瓶加工中,普通瓶胚的瓶胚身基本都是直的,截面呈一条略带倾斜角的直线(倾斜角在1°以内,作为脱模角),上下直径差别很小(见附图1)。但是,该结构的瓶胚在被用于吹制拉伸比较小、瓶子上下直径差别较大的瓶子时存在着很大的局限性。特别是对于PET瓶子而言,吹瓶时容易在瓶子肩部或瓶底堆积PET材料。如果想仅靠调整吹瓶工艺让瓶身上的某一区域壁厚增厚以满足某些性能,而不是在注塑阶段就对瓶胚进行调整,在不加克重的情况下仅以普通瓶胚结构是很难实现加工目的的。
技术实现思路
本专利技术要解决的技术问题是,克服现有技术中的不足,提供一种具有两段直线型胚身的瓶胚。为解决上述技术问题,本专利技术的解决方案是:提供一种具有两段直线型胚身的瓶胚,是以注塑方式一体成型的,由上至下依次包括瓶胚口、过渡区域、瓶胚身和瓶胚底;所述瓶胚身由上段直线型瓶胚身、下段直线型瓶胚身和位于中间的瓶身过渡段共同组成,瓶胚整体呈子弹头形状,其中下段直线型瓶胚身与瓶胚底的圆弧之间以相切的方式实现过渡;两段直线型瓶胚身的轴向截面均呈两条直线且以各自形成的夹角作为脱模角,两段直线型瓶胚身之间以圆弧过渡。本专利技术中,上段直线型瓶胚身与下段直线型瓶胚身的平均径向尺寸之比为1∶0.95~1∶0.45。本专利技术中,上段直线型瓶胚身与下段直线型瓶胚身的壁厚比值为1∶0.8~1∶1 ...
【技术保护点】
1.一种具有两段直线型胚身的瓶胚,是以注塑方式一体成型的,由上至下依次包括瓶胚口、过渡区域、瓶胚身和瓶胚底;其特征在于,所述瓶胚身由上段直线型瓶胚身、下段直线型瓶胚身和位于中间的胚身过渡段共同组成,瓶胚整体呈弹头形状,下段直线型瓶胚身与瓶胚底的圆弧之间以相切的方式实现过渡;两段直线型瓶坯身的轴向截面均呈两条直线且以各自形成的夹角作为脱模角,两段直线型瓶坯身之间以圆弧过渡。
【技术特征摘要】
1.一种具有两段直线型胚身的瓶胚,是以注塑方式一体成型的,由上至下依次包括瓶胚口、过渡区域、瓶胚身和瓶胚底;其特征在于,所述瓶胚身由上段直线型瓶胚身、下段直线型瓶胚身和位于中间的胚身过渡段共同组成,瓶胚整体呈弹头形状,下段直线型瓶胚身与瓶胚底的圆弧之间以相切的方式实现过渡;两段直线型瓶坯身的轴向截面均呈两条直线且以各自形成的夹角作为脱模角,两段直线型瓶坯身之间以圆弧过渡。2.根据权利要求1所述的瓶胚其特征在于,上段直线型瓶胚身与下段直线型瓶胚身的平均径向尺寸之比为1∶0.95~1...
【专利技术属性】
技术研发人员:崔燕燕,程峰,
申请(专利权)人:西帕机械杭州有限公司,
类型:发明
国别省市:浙江,33
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