raw material

Running shoes are made of a variety of materials. The sole is divided into three layers: insole, midsole and outsole. The insole is a thin layer of artificial ethylene vinyl acetate (EVA). The midsole provides most of the cushioning, and their composition varies from manufacturer to manufacturer. Usually, it consists of polyurethane that surrounds another material (such as gel or liquid silicone), or polyurethane foam that is given a special brand name by the manufacturer. In some cases, polyurethane may surround a capsule of compressed air. The outsole is usually made of hard carbon rubber or softer blown rubber, although manufacturers use a variety of materials to create different textures on the outsole.

The rest of the covering is usually a synthetic material, such as artificial suede or nylon braid, with a plastic board or wood board that supports the shape. There may be leather coverings or nylon coverings with leather attachments. Cloth is usually limited to shoelaces installed through plastic eyelets, and nails have been replaced by an adhesive called an adhesive, which binds the various components together.

design

In the past 15 years, the design of running shoes has undergone tremendous changes, and the running shoes are now available in various styles and colors. Contemporary shoe designers focus on the anatomy and movement of the foot. They use cameras and computers to analyze factors such as limb movement, the impact of different terrain on impacts, and the impact of feet on impacts. Athletes are labeled pronators if their feet roll inward or supinators if their feet roll outward. Along with pressure points, friction patterns and impact forces, this information is entered into the computer, and the computer will calculate how to best adapt to these conditions. The designer will then test and develop prototypes based on the research on joggers and professional runners, so as to make the final design for the final mass production.

Running shoes may have as many as 20 parts, and the components listed below are the most basic. There are two main parts of a shoe: the upper (covering the top and sides of the foot) and the sole (contact with the foot).

When we move around the shoe in a clockwise direction, starting from the front of the upper part is the feather line, which forms the edge where the tip of the fender (or toe protector) meets the sole. Next comes the upper, which is usually a single piece of material that can shape the shoe and form the toe box. The shoe upper also has attachments, such as the throat, which contains the eyelids and shoelace parts. Under the shoelace part is the tongue, which can protect the foot from direct contact with the shoelace. Also attached to the upper along the sides of the shoe are reinforcements. If sewn on the outside of the shoe, these reinforcements are called saddles; if sewn on the inside, they are called bow bandages. Towards the rear of the shoe is the collar, and the upper usually has an Achilles tendon protector at the rear of the top of the shoe. Foxing shapes the back end of the shoe. Under it is a plastic cup to support the heel and heel.

There are three main parts at the bottom, the outsole, the midsole and the slope heel. Outsole provides

The first step in running shoe manufacturing involves die-cutting shoe parts with a cookie cutter. Next, stitch or glue together the parts that will form the upper part of the shoe. At this time, the upper does not look like a shoe, but a round cap. The extra material is called the permanent margin. After the shoe upper is heated and installed around the plastic mold called the shoe last, the insole, midsole and outsole are glued to the shoe upper.

The first step in running shoe manufacturing involves die-cutting shoe parts with a cookie cutter. Next, stitch or glue together the parts that will form the upper part of the shoe. At this time, the upper does not look like a shoe, but a round cap. The extra material is called the permanent margin. After the shoe upper is heated and installed around a plastic mold called the shoe last, the insole, midsole and outsole are glued to the shoe upper.

Traction and absorb shock. The midsole is designed for shock absorption, and the slope heel supports the heel. The insole is located inside the shoe and also contains arch support (sometimes called arch cookies).

manufacture

process

Shoemaking is a labor-intensive process, and the cost of producing many components of running shoes reflects the necessary skilled labor. Each stage of production requires precision and skills, and taking shortcuts to reduce costs may result in the production of inferior shoes. Some running shoes (called "slip shoes") do not have an insole board. Instead, a single layer of upper is wrapped around the top and bottom of the foot. However, most running shoes consist of an insole board, which is glued to the upper with cement. This section will focus on cement shoes.

Transport and stamping fabrics

1 First, the prepared synthetic material rolls and dyed, split and suede leather (used as part of fox skin) rolls to the factory.

2 Next, the shoe shape is stamped with a compression molding machine, and then it is cut in the form of a cookie cutter and various marks are engraved to guide the rest of the assembly. After packaging and labeling, these works will be sent to another part of the factory for stitching.

The complete running shoes have been tested for quality through the procedures established by the shoes and the United Trade Research Association. Defects inspected include poor durability, incomplete cement bonding, and incorrect stitching.

The complete running shoes have been tested for quality through the procedures established by the shoes and the United Trade Research Association. Defects inspected include poor durability, incomplete cement bonding, and incorrect stitching.

Assemble the upper and insole

3 Sewing or gluing the parts that make up the upper part of the shoe, and punching the shoelace hole. These components include feather threads, uppers, mudguards, throat (with eye and lace parts), tongue, saddle or bow bandages and other reinforcements, collars (with Achilles tendon protectors), tops and logos. At this point, the upper does not look like a shoe, but a round cap, because when the studs are glued to the sole, there will be excess material (called permanent edges) folded under the sole.

4 Next, sew the insole on the side of the upper. Then add the hardener to the heel area and toe box, and insert the insole board.

Attached upper and bottom

part

5 Heat the finished shoe upper and put it around the shoe. The shoe last is a plastic mold that forms the final shape of the shoe. Then, the automatic last helper pulls down the shoe upper. Finally, a cement nozzle is used to apply cement between the upper plate and the insole plate, and then the machine presses the two parts together to bond them together. The upper now has the exact shape of the finished shoe.

6 Layer and glue the pre-stamped and excavated form of the midsole and outsole or wedges to the upper. First, align and glue the outsole and midsole together. Next, align the outsole and midsole with the upper and place them above the heater to reactivate the cement. When the cement cools, the upper part and the lower part are joined together.

7 Take out the shoes from the last shoe and inspect it. Scrape off excess cement.

QC

Manufacturers can test their materials using procedures established by the Footwear and Joint Trade Research Association (SATRA), which provides equipment designed to test every element of shoes. After the shoe is completed, the factory's inspector will check for defects such as poor durability, incomplete cement bonding and stitching errors. Because running can cause injuries to the tendons and ligaments of the feet and legs, another test is currently being developed to evaluate the shock absorption performance of the shoes.

future

In the near future, experts predict that current design and manufacturing processes will continue to improve, rather than major breakthroughs. In the next ten years, the size of sports shoes will become a worldwide standard. Designers will continue to seek lighter weight materials to provide better support and stability when the gel and air system are further used. Electronic components will also be built into running shoes so that microchips can be used to measure information about physical characteristics and development, and then download them to a computer. Another feature that has begun to appear is a battery-powered lighting system to accommodate jogging at night. As consumers continue to spend millions of dollars on comfortable running shoes.

read more:Top Private Label Running Shoe Manufacturers And Suppliers