Safety shoes production process points: molding, injection, cemented, seam. Injection of safety shoes light, soles and vamps high viscosity, outsole is usually made of polyurethane materials, wear, waterproof. Cement shoes is a long history of the production of a traditional process, the general soles of rubber and other materials.
Different production methods are distinguished:
• The sole can be glued (cemented). In this process the upper and the sole are glued together. In this case the sole is fabricated first, with a separate machine. This is the easiest method and it can be applied to all sorts of soles.
• Another process is the injection of polyurethane, in which the sole of polyurethane is created and directly attached to the upper. The upper is placed into a mold (normally made of aluminum or Teflon), then polyurethane is injected into the mold, and when it cools it becomes solid and sticks to the upper. This process fixes together the upper and the sole very firmly.
• The soles can also be sewn, but this methods is being used less and less, for production efficiency reasons. AKA Goodyear welted or seam.
"Goodyear welt construction" involves stitching a welt to the upper and a strip of preformed canvas like a "rib" that runs all around and bottom (known as "gemming") cemented to the insole of a shoe as an attach-point for the out sole or midsole (depending on the Goodyear welt variant). The space enclosed by the welt is then filled with cork or some other filler material (usually either porous or perforated, for breathability), and the outsole is both cemented and stitched to the welt. Shoes with other types of construction may also have welts.
For the process equipment, here focuses on the injection of safety shoes production equipment. International is currently recognized as the most advanced safety shoe production equipment Germany's Desma DESMA even the injection shoe machine and the Italian reputation even to help injection shoe machine, the whole process by the computer control, which Dresdner DESMA and BASF Technology Materials Of the ultra-low density foam technology marriage, so that DESMA equipment, the amount of technology to meet the global similar equipment can not achieve a new height, buffer performance, energy absorption, seismic performance, adhesive fastness always walk in the forefront of technology.