Step by step - handmade
First part of every shoe is the last, which is responsible for the later form of the shoe. The development of a shaft (the upper part of a shoe) is connected with a lot of handwork. That's why the first samples are 100 % handmade. Only after the form is nearly perfect, the composition in CAD begins. After that the construction of the individual parts, the gradation (scaling of the sizes) and the responsible data for the press knife are getting built. As you can see, it's a long way from the first sample to our certified work- and safety shoes.
1. Clicking / Pressing
The different parts of the shaft are getting cut with the press knife. The press knife is made of one- or two edged steel and has the exactly same form as the shaft. Furthermore do worked-in slots, spikes and thorns bring clearly indication for later assembly of the shaft parts.
To avoid possible inequalities, the thickness of the leather get's halved.
The precise assembly of the shaft parts demands a high qualification. After the upper leather parts are sewn up, the lining gets stitched and turned over.
4. Strobel method
The shaft consisting shaft material and lining gets sewn up flush with the insole. Advantage about this technique is the low weight and the high flexibility. Special feature about SCHÜRR shoes manufactured with strobel method are the integrated gel-parts from the triple cushioning resp. triple cushioning plus in the insole.
The so called "AGO-method" means, that the shaft gets framed over the last with lasting pincers, moulded and sticked with the insole. For the bonding we usually use permanent adhesive.
6. Surface grinding
After the lasting, the underside of the shaft has to be grinded. Thereby you have to keep attention, that not to much material gets grinded off resp. the gel-parts in the triple cushioning doesn't get damaged.
To guarantee a perfect bonding between sole and shaft, the inside edge of PU- and rubbersole gets roughed.
The sole edge gets marked on the shaft. This marking has strictly to comply with the adhesive application.
9. Spreading process
Adhesive gets spread on the prepared shaft and sole by hand.
10. Fitting outsole and shaft
The prepared sole with adhesive gets activated with heat. After that the prepared shaft gets attached to the outsole. Now, outsole and shaft are getting pressed together, to hold durable.