公开(公告)号：US3753368A

公开(公告)日：1973-08-21

申请号：US3753368D

申请日：1971-06-11

Applicant: LANG I

Inventor： LANG I

IPC: B21D37/20 ,  B21D37/14

CPC classification number: B21D37/20 ,  Y10S72/702 ,  Y10S72/705

Abstract: This application discloses a mold for making die sets for bumper repair, a method of making the mold, and a method of making the dies. The mold is made from an undamaged bumper section to which extensions are added to make an enclosure suitable for simultaneously casting both of the male and female die members. The welding and a subsequent step of heat treating is accomplished in such a way that the longitudinal curvature is greater than that of the original bumper so that the resulting die set tends to overbend bumpers being repaired. The mold is placed in a flask with side walls and liquid casting metal is introduced inside and outside of the mold, filling the inside and substantially enclosing the outside. After hardening, the flask and mold are removed, leaving a matching, fully congruent die set. The working (pressing) surfaces of the die thus obtained correspond exactly to each other and are true copies of the faultless original bumper segment, except for the added curvature.

Abstract translation: 本申请公开了一种用于制造用于保险杠修复的模具的模具，制造模具的方法以及制造模具的方法。 模具由未损坏的保险杠部分制成，延伸部被加入到该保险杠部分中，以形成适于同时铸造两个模具和阴模的两个外壳的外壳。 焊接和随后的热处理步骤以使得纵向曲率大于原始保险杠的弯曲度的方式实现，使得所得到的模具倾向于过弯弯曲保险杠被修理。