利用高分子材料复制枪弹物证三维形貌及痕迹特征  

Ballistic Evidence Reproduced of Its Own 3D Shape and Marks Patterns by Polymer Materials

作　　者：李轶昳[1] 周志飞[1] 张刚[1] 崔斌[1] 王晓琳[1] 马新和[1] LI Yiyi;ZHOU Zhifei;ZHANG Gang;CUI Bin;WANG Xiaolin;MA Xinhe(Institute of Forensic Science,Ministry of Public Security(MPS)&MPS’Key Laboratory of Trace Science and Technology,Beijing 100038,China)

机构地区：[1]公安部物证鉴定中心痕迹科学与技术公安部重点实验室

出　　处：《刑事技术》2019年第6期497-501,共5页Forensic Science and Technology

基　　金：公安部科技强警基础工作专项项目（No.2015GABJC20)

摘　　要：目的建立一种简便易行、精确可靠的枪弹物证的复制方法,以提高枪弹痕迹检验效率。方法选择流动性好、固化成型后收缩率小、物理性能稳定、抗撕强度高的高分子材料,结合快速制模以及注塑成型技术,建立一种射击弹头、弹壳三维形貌以及痕迹特征的复制方法——枪弹物证模塑成型技术。将制成的枪弹物证模型与原物在外形、痕迹特征方面进行比较分析。结果使用本方法制备的枪弹模型除复制原物的三维形貌外,还复制其细小的痕迹特征,与原物在痕迹检验中可以达到同等的效果。结论利用这种枪弹物证模型与原物外形及痕迹特征的同一性,能够实现同一枪弹痕迹物证的多人同时检验,从而解决枪弹痕迹检验效率低、案件串并时效性差的难题。Objective A simple,feasible,accurate and reliable method was here studied to reproduce the ballistic evidence of its own 3D morphology and characteristic marks patterns so as to improve their comparison efficiency into excelling the traditional handling by microscope.Methods Based on the requirements of good fluidity,low shrinkage of solidified mold,stable physical properties and high tear-resistance,the high polymer materials were selected as the molding stuff.In combination of both the rapid tooling technology and injection-molding one,a new approach,the so-called plastic-molding of ballistic evidence,was established to duplicate the 3D shape and trace features of the involved bullet and cartridge case(those ballistic evidence).Results The duplicated model produced by this manipulation revived the ballistic evidence of not only its three-dimensional shape but also the fi ne mark features,having shown the same effi ciency and effect as those of the original evidence for examination.Conclusions The duplicated model is almost identical to the original ballistic evidence with both of their shapes and mark features,therefore capable of meeting multi-person and simultaneous examination onto same ballistic evidence,thus improving the effi ciency of mark comparison and having series of cases linked easier.

关 键 词：射击弹头 射击弹壳 痕迹提取 枪弹物证模塑成型 高分子材料 

分 类 号：DF794.1[政治法律—诉讼法学]