Method for manufacturing light-weight waterproof shoe/boot

A method for manufacturing a light-weight waterproof boot, at least comprising the following steps:

• a first step of cutting, in which a piece of waterproof leather that has a back side coated with a water-resistant hot-melt adhesive is subjected to a cutting operation to make at least a vamp water-resistant plate, one to multiple vamp decorative plates, a heel water-resistant plate, and a shaft water-resistant plate, wherein the vamp water-resistant plate has one side edge that is recessed inwardly to form a first insertion opening and the shaft water-resistant plate has one side edge that is formed with a shaft arc opening;
• a second step of arranging pattern of vamp section and the shaft section, in which the vamp water-resistant plate and the one to multiple vamp decorative plates that are formed with the cutting operation in the previous step are arranged and stacked on a vamp lining plate that is in a planar form, and the shaft water-resistant plate that is formed with the cutting operation in the previous step is arranged and stacked on a shaft lining plate, wherein the vamp lining plate has a side edge that is recessed inwardly to form a second insertion opening, such that the second insertion opening is in alignment with and overlaps the first insertion opening of the vamp water-resistant plate;
• and the shaft lining plate is formed with a lining arc opening on a side edge thereof corresponding to that of the shaft water-resistant plate that is formed with the shaft arc opening, wherein the shaft water-resistant plate is longer than the shaft lining plate such that the shaft arc opening of the shaft water-resistant plate projects beyond and is located outside the lining arc opening of the shaft lining plate, and a portion of shaft hot-melt adhesive that is located along a peripheral edge of the shaft arc opening is not covered by the shaft lining plate;
• a third step of hot pressing, in which the vamp lining plate and the vamp water-resistant plate, and the vamp decorative plates that are arranged and stacked thereon are placed in a hot pressing apparatus for hot pressing, such that the hot-melt adhesive layer on the back sides of the vamp water-resistant plate and the vamp decorative plates are heated and melted to combine with the vamp lining plate as a unitary combination, and portions of the vamp water-resistant plate and the vamp decorative plates that are stacked on each other are combined together as a unitary combination so as to form a water-resistant vamp section;
• and the shaft lining plate and the shaft water-resistant plate arranged and stacked thereon are placed in the hot pressing apparatus for hot pressing, such that the hot-melt adhesive layer on the back side of the shaft water-resistant plate is heated and melted to combine with the shaft lining plate as a unitary combination to form a water-resistant shaft section;
• a fourth step of combining vamp section and shaft section, in which a portion of the hot-melt adhesive that is located along a peripheral edge of the shaft arc opening of the shaft section is stacked on a peripheral edge of the first insertion opening of the vamp water-resistant plate of the vamp section formed in the previous steps and is subjected to hot pressing such that the portion of the shaft hot-melt adhesive that is located along the peripheral edge of the shaft arc opening of the shaft section is heated and melted to combine the shaft section and the vamp section to each other;
• a fifth step of sewing heel section, in which vamp outer edges of the vamp section at two opposite sides of the first insertion opening are jointed to each other and shaft outer edges of two opposite sides of the shaft section are jointed to each other, and are sewn together so that the vamp section and the shaft section jointly form a three-dimensional configuration, wherein an opposite end of the shaft section forms a shaft opening that is connected to and in communication with the first insertion opening of the vamp section;
• and portions around two sides of the sewn sites of the vamp section and the shaft section form a heel section;
• a sixth step of hot-pressing heel section, in which the heel water-resistant plate that is made in the cutting operation of the first step is set on and covering the sewing line of the vamp section and the shaft section and is subjected to hot pressing, so that the hot-melt adhesive on the back side of the heel water-resistant plate is heated and melted and combines with the vamp section and the shaft section to form a unitary combination, and a joint site that is between the heel water-resistant plate and the vamp section and the shaft section is made a waterproof interface therebetween;
• a seventh step of combining midsole, in which a midsole is attached to and combined with a bottom of the vamp section by means of sewing or adhesive to form a semi-finished product;
• and
• an eighth step of injecting sole, in which the semi-finished product is fit to a multi-segment last of an injection apparatus and a first mold member, a second mold member, and a third mold member are closed to enclose the semi-finished product, such that after the third mold member is closed, a sole gap is formed between a third mold cavity of the third mold member and the midsole of the semi-finished product;
• and a sole material that is heated and melted is injected into the third mold cavity of the third mold member to form a sole, wherein the sole material that is injected into the third mold cavity combines with the midsole and covers a joint interface between the midsole and the vamp section so that after being cooled, a product is formed and removed to form a light-weight waterproof boot product.