Stamping production plays an important role in lean automotive production Just think about it, the size of the car shell, if outsourced for processing, daily delivery, morning delivery, afternoon delivery, painting and drying, logistics volume, and storage area, as well as the required management personnel and storage space, are really low value-added jobs If it is produced by oneself, under the principle of zero inventory, raw materials do not occupy much space and are only produced when needed. Compared to the inventory of finished car body products, it definitely occupies many times more space than raw materials The time consumption during mold replacement is an important issue

In small and medium-sized punching machines, without a quick mold changing device, preparing materials, folding and unloading molds, cleaning the mold table, and replacing with another set of molds, each punching machine takes approximately 15-20 minutes If there are multiple processes for single punching, the delay will be longer unless multiple people change the mold at the same time If the mold is sent in sequence, it will take about 30 minutes to complete the replacement of a set of molds
There is an impact on the mold replacement work, as the design of each set of molds does not have a uniform height, with different accessories needed to fix the molds, which is time-consuming and laborious It is difficult to transfer molds and molds

Medium sized punching machines have similar quick locking devices to enhance the efficiency of mold changing
In the 1980s, there was already a rapid mold changing system that appeared on videotapes. At that time, it was seen that 1000 tons of molds were delivered in sequence, the molds were removed, another set of molds was installed, and production was resumed It takes 2 minutes

This design requires the punching machine to reserve a mold changing slide car for placement
This production mode requires multiple designs to be coordinated, otherwise, having production equipment and other waste will affect the value of the system