Negative angle forming type rotary cam moving apparatus

Abstract

The present invention provides a rotary cam moving apparatus of a negative angle shaping mold which can avoid an interference of rotary cams, require no canceling process in rotary cam end portions with a high accuracy, and maintain a strength in the rotary cam end portion. There is provided a rotary cam moving apparatus of a negative angle shaping mold comprising: a lower mold which mounts a metal thin plate work on a supporting portion; an upper mold which descends in a linear direction with respect to the lower mold and comes into contact with the work to shape the work; a rotary cam which forms an intrusion shaping portion intruded from a locus of the upper mold in an edge portion close to the supporting portion, and is rotatably provided in the lower mold; a slide cam which has an intrusion shaping portion, and is slidably provided so as to oppose to the rotary cam; and an automatic resetting device which rotates and moves backward the rotary cam to a backward moved state capable of taking out the work from the lower mold after shaping, and is provided in the lower mold, in which the work mounted on the supporting portion of the lower mold is shaped by the intrusion shaping portion of the rotary cam and the intrusion shaping portion of the slide cam by sliding the slide cam, and the shaped work is taken out from the lower mold by rotating and moving backward the rotary cam by means of the automatic resetting device after shaping, and a plurality of rotary cams are continuously arranged in an oblique shape, wherein one rotary cam of the adjacent rotary cams is moved so as to be apart from another rotary cam at a time of being rotated to a backward moved state.

What is claimed is:  
     
         1 . A rotary cam moving apparatus of a negative angle shaping mold comprising: 
 a lower mold which mounts a metal thin plate work on a supporting portion;    an upper mold which descends in a linear direction with respect to said lower mold and comes into contact with the work to shape the work;    a rotary cam which forms an intrusion shaping portion intruded from a locus of the upper mold in an edge portion close to the supporting portion, and is rotatably provided in the lower mold;    a slide cam which has an intrusion shaping portion, and is slidably provided so as to oppose to said rotary cam; and    an automatic resetting device which rotates and moves backward the rotary cam to a backward moved state capable of taking out the work from the lower mold after shaping, and is provided in the lower mold, 
 in which the work mounted on the supporting portion of the lower mold is shaped by the intrusion shaping portion of the rotary cam and the intrusion shaping portion of the slide cam by sliding the slide cam, and the shaped work is taken out from the lower mold by rotating and moving backward the rotary cam by means of the automatic resetting device after shaping, and a plurality of rotary cams are continuously arranged in an oblique shape,  
 wherein one rotary cam of the adjacent rotary cams is moved so as to be apart from another rotary cam at a time of being rotated to a backward moved state.  
   
     
     
         2 . A rotary cam moving apparatus of a negative angle shaping mold as claimed in  claim 1 , wherein a moving rail and a roller for guiding the moving rail are provided as moving means for being apart from another rotary cam.