The process includes:. But the basic elements of the process are the same, and you can find this basic process in place at factories around the world. The rubber mixing and pressing operations are messy, with lots of moving parts and lots of excess, which is why the process is so often outsourced. But because these factories specialize in making rubber soles, they can do high-volume work and crank out an unbelievable number of soles each day — efficiently and accurately.
Shaw, we specialize in polyurethane , rubber and composite molding , which includes release agents for both single- and dual-density unit soles. We can create custom mold release solutions for manufacturers operating in a range of industries, shoe production and beyond. We can also adapt as new technologies and innovations become available. We share your urgency in creating the most effective, most affordable processes possible.
Gristle Rubber: This rubber sole is mostly used in industrial footwear. It is robust in quality. At times , cracks also occur.
Ployurethane: This offers a good resistance to slipping. It is light and hard wearing. Whenever designing a custom stamp for your company, never compromise on its quality because in the end it is the most Many industries use rubber tubing for various purposes.
With the right combination of mixing, heat, and curing agents, sticky natural rubber is transformed into tough and colorful rubber shoe bottoms. The molds and processes are all about the same. Black rubber, crystal rubber, or gum rubber is all a matter of the recipe. To make a rubber outsole you need a sole design, metal outsole tooling, a heated hydraulic press, and rubber compound. The rubber pressing operations for shoe soles are usually sub-contracted to a factory that specializes in the compounding and pressing of the rubber parts.
Disadvantages: PVC is used only in the manufacture of casual shoes for autumn or spring, because this material has a large mass and low frost resistance, not withstanding temperatures below degrees. In addition, the PVC sole does not attach well to the leather upper of the shoe, so quality leather shoes with a PVC sole are complex and expensive to manufacture. Advantages: EVA is a very lightweight material with good cushioning properties. It is used mainly in children's, home, summer and beach shoes, and in sports shoes - in the form of inserts, because it is able to absorb and distribute shock loads.
Disadvantages: Over time, EVA soles lose their cushioning properties. This is due to the fact that the pore walls are destroyed, and the entire mass of EVA becomes flatter and less elastic. Also, EVA is not suitable as a material for winter shoes, since this material is very slippery and unstable to frost. Thermoplastic rubber - This is shoe rubber made from synthetic rubber, which is stronger than natural rubber, but no less elastic.
However, modern technology allows using various additives to increase its flexibility. Advantages: Thermoplastic rubber has a low density and, accordingly, a lower mass than other materials.
There are no through pores in it, so moisture does not pass through it. However, there are surface pores in the TPR, and they provide high thermal protection. In addition, TPR, like other porous rubbers, is an elastic material that provides good cushioning properties. Thanks to this characteristic, shoes with soles made of TPD relieve unnecessary stress on the legs and spine. Disadvantages: The low density of the material can be not only a virtue, but also a disadvantage.
In the case of TPR, it leads to the fact that the sole of this material does not differ in particularly outstanding heat-shielding properties. In addition, in wet and frosty weather, the thermoplastic rubber sole slides heavily. Advantages: Leather sole is used in all types of shoes, including children's, home and model all seasons.
Leather-soled shoes look great and allow the foot to breathe, as it is a natural membrane. Disadvantages: When worn in wet weather, the leather sole may be deformed, and care of it implies the constant use of special sprays and impregnations.
The leather has low wear resistance, so the installation of prophylaxis is recommended on leather soles, and for winter shoes it is mandatory, otherwise without it the sole will slide on ice and snow and deform even faster.
Advantages: In appearance, hardness and ductility, tunitic soles are similar to leather ones, but they behave better in operation: they almost do not wear out and do not get wet. It is easy to apply relief to such soles, which gives them a slightly greater grip on the surface than the leather. Disadvantages: But even so, shoes with tunit soles are very slippery due to the high stiffness of the material. Therefore, tunit is used in the manufacture of only summer and spring-autumn shoes with the adhesive method of fastening.
Advantages: Wood is an environmentally friendly and very hygienic material, and wooden soles have an original appearance.
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