TW202003197A - Composite shoe accessory manufacturing process and finished product thereof including the steps of injection molding, foaming mold feeding, foam molding, and cool shaping - Google Patents

Abstract

A composite shoe accessory manufacturing process includes the steps of injection molding, foaming mold feeding, foam molding, and cool shaping. An injection casing having an inner side and an outer side is integrally formed by injection mold, and the injection casing is placed in a foaming mold. A plurality of foamed particles are filled in a foam cavity and stacked on the inner side of the injection casing. A heating fluid is poured into the foaming mold so that the outer surfaces of the plurality of foamed particles are adhered to each other, and correspondingly adhered to the inner side of the injection casing to form an elastic foaming layer. A cooling fluid is poured into the foaming mold to reduce the temperature of the elastic foaming layer so that the elastic foaming layer is cooled and stabilized in shape and size. After completion, the elastic foaming layer is removed from the foaming mold. Thereby, a composite shoe accessory with lightweight and moderate structural strength is produced.

Description

Compound shoe accessories manufacturing process and finished product

The present invention relates to accessories used in shoes, which are mainly used for supporting purposes and are made of dual materials.

In daily life, most people rely on their feet to support their body weight. Whether it is the basic movements of standing, walking, or even running or intense sports, they need to rely on their feet to withstand large changes in gravity. Daily load. Today, the public has long been accustomed to wearing shoes to go out, whether it is simply going out, outdoor activities or even intense sports. The shoes provide basic safety protection, and also provide the wearer with a stable stride to walk, slow down the reaction force of the exercise posture to the feet, and overcome the discomfort and pain.

The structure of the shoe is quite complicated, and it can be roughly divided into three major areas: upper, midsole and sole, and each has its own protective effect. In addition, in order to straighten the upper, meet the needs of the wearer's foot, and protect the foot, the upper is still subdivided into the toe, tongue, shoelace, upper piece, insole...etc. However, the more accessories add to the overall weight of the shoe, and in order to maintain good support, a moderate material hardness is also necessary to avoid the deformation of the upper, especially the swaying of the sole in the shoe under intense exercise, so this makes the shoe Reducing the overall weight and maintaining its support stability has always been the goal pursued by the industry.

In addition, in recent years, in order to achieve the function of light weight and conformable covering, the industry has adopted a yarn blending technique to make it lighter and thinner and better to wear the covering touch. However, this woven shoe model still requires traditional shoe accessories for specific parts to support, and the upper is stable on the wearer, and some shoe accessories still need to be used.

The main object of the present invention is to provide a composite shoe accessory with light weight and moderate structural strength, which is accomplished through specific raw materials and manufacturing methods.

A composite shoe accessory manufacturing process includes: injection molding, in which an injection mold is integrally formed by an injection mold to produce an injection shell having one of an inner side and an outer side opposite to each other; a foaming mold is charged, and the injection shell is taken out of the injection mold. Placed in the foaming mold and filled with a plurality of foaming particles in the foaming cavity and stacked on the inner side of the injection shell; foaming molding, pouring heated fluid into the foaming mold to increase the temperature of the foaming particles and Reaching the foaming working temperature of the plurality of foamed particles, so that the outer surfaces of the plurality of foamed particles are physically bonded to each other, and are correspondingly bonded to the inner side of the injection shell to form an elastic foam layer; cooling and shaping, pouring cooling fluid into the foam The temperature of the elastic foam layer is lowered by the mold, so that the elastic foam layer cools and stabilizes the shape and size, and the composite shoe accessories are taken out of the foam mold after completion.

A composite shoe accessory, comprising: an injection shell which is integrally formed by injection molding in an injection mold, and the injection shell has an inner side and an outer side opposite to each other; and an elastic foam layer, which consists of a plurality of hairs The foam particles are foam-bonded to the inner side of the injection shell through the foaming mold, and the surfaces of the plurality of foam particles are hot-melt bonded to each other, and the plurality of foam particles are stacked and arranged in a granular shape after foaming.

1‧‧‧ injection mould

2‧‧‧shot shell

21‧‧‧Inside

22‧‧‧Outside

3‧‧‧foam mould

4‧‧‧Expanded particles

40‧‧‧Elastic foam layer

5‧‧‧Composite shoe accessories

The first figure is a block diagram of the manufacturing process of the composite shoe accessory of the present invention.

The second figure is a schematic diagram of the injection shell made by the injection mold in the present invention.

The third figure is a schematic view of the foaming mold of the present invention incorporating foamed particles into the injection shell through foaming molding.

The fourth figure is a perspective schematic view of the composite shoe accessory of the present invention.

The fifth figure is a schematic diagram of the composite shoe accessory of the present invention applied to Hongbao (back cover) and shoe support (front cover), and is built inside the shoe.

The sixth figure is a schematic view of the composite shoe accessory of the present invention applied to Hongbao (back cover) and shoe support (front cover), and is exposed to the shoe.

The seventh figure is an exposed three-dimensional schematic view of the composite shoe accessory of the present invention applied to a shoe upper.

The eighth figure is a schematic view of the present invention where the composite shoe accessory is applied to the bottom part of the shoe and is exposed.

The ninth figure is a block diagram of another embodiment of a composite shoe accessory manufacturing process of the present invention.

Please refer to the first figure, the composite shoe accessory manufacturing process of the present invention includes injection molding, foam mold feeding, foam molding and cooling shaping steps.

Please refer to the first to fourth figures. Injection molding is an integral molding of the injection mold 1 to produce an injection shell 2 having one of an inner side 21 and an outer side 22 facing each other; the foaming mold is charged, and the injection shell 2 is taken out of the injection mold 1 and placed in the hair The foaming mold 3 is filled with a plurality of foaming particles 4 in the foaming cavity and stacked on the inner side 21 of the injection shell 2; foaming molding, pouring heated fluid into the foaming mold 3 to increase the foaming particles 4 The temperature reaches the foaming working temperature of the plurality of foamed particles 4, so that the outer surfaces of the plurality of foamed particles 4 are physically bonded to each other, more correspondingly to the inner side 21 of the injection shell 2 to form an elastic foam layer 40; cooling and setting, The cooling fluid is poured into the foaming mold 3 to directly lower the temperature of the elastic foaming layer 40, so that the elastic foaming layer 40 cools to a stable shape and size, and the composite shoe accessory 5 is taken out of the foaming mold 3 after completion.

Through the above process, the composite shoe accessory 5 as shown in the fourth figure can be produced. Here, the Hongbao (back shoe cover) shape is taken as an example, which includes: an injection shell 2 which is integrally injected through the injection mold 1 Formed, and the injection shell 2 has an inner side 21 and an outer side 22 opposite to each other; and an elastic foam layer 40, which is foamed and bonded to the injection shell 2 by a plurality of foamed particles 4 through a foaming mold 3 The inner surface 21 of the plurality of foamed particles 4 is thermally fusion bonded to each other, and the plurality of foamed particles 4 are stacked and arranged in a granular shape after being foamed.

It can be understood from the above description that the present invention first produces the injection casing 2 by injection molding, and uses the foaming technology to form the foamed particles 4 at the position of the inner side 21 of the injection casing 2, and the foamed particles 4 are thermally bonded to each other's surface And the particles are arranged and stacked to form an elastic foam layer 40 located on the inner side 21 of the injection shell 2. In this way, a composite shoe accessory 5 is obtained, which can be adjusted during the injection and foaming of the material. Processing parameters such as temperature and time 1. Under the proportion of material formula, control its hardness, density, rebound rate, etc., to produce the composite shoe accessories required to be lightweight and maintain moderate structural strength5. It can also change the characteristics in accordance with the needs of other shoe parts, and change its appearance at the same time, which has met the needs of a variety of shoe accessories. For example, the composite shoe accessory 5 in the fifth figure is used in Hong Kong treasure (back cover), shoes The brace (front cover of the shoe) and the composite shoe accessory 5 are in a built-in form inside the shoe.

The composite shoe accessory 5 of the present invention can also be used as an exposed type of port treasure (back cover) and shoe support (front cover), for example, as shown in the sixth figure, and the injection shell 2 adopts a transparent type. The inner elastic foam layer 40 can be seen through the injection housing 2 directly. It is even made as a composite shoe accessory 5 in the form of an upper, as shown in the seventh figure of the figure. It can also become a composite shoe accessory 5 of the sole shape of the shoe bottom, as shown in the eighth figure.

The aforementioned heating fluid is water vapor at 100°C to 140°C, and it is poured into the cavity of the foaming mold 3 for 2 to 4 minutes and contacts the elastic foaming layer 40; wherein the cooling fluid is water at 40°C to 20°C for 80 From seconds to 100 seconds, it is poured into the cavity of the foaming mold 3 and contacts the elastic foaming layer 40.

The injection shell 2 is transparent or opaque, and the injection shell 2 is monochrome or color; the injection shell 2 is made of TPU, TPAE, nylon, TPO, TPEE, EVA or TPE, and the elastic foam layer 40 is E-TPU, E-TPEE, E-TPAE, E-TPO, E-TPE, E-EVA single-material foam or composite foam; in addition, the elastic modulus of both the injection shell 2 and the elastic foam layer 40 is not The same, and the thickness dimension of the elastic foam layer 40 is greater than the thickness dimension of the injection housing 2.

Another composite shoe accessory manufacturing process of the present invention, as shown in the ninth figure, includes injection molding, surface treatment, foam mold feeding, foam molding, and cooling and shaping steps. The biggest difference from the foregoing process is that the injection There is a surface treatment between the forming and the foaming mold feeding. There are two types of surface treatment referred to here. The first type of surface treatment is to sequentially apply a surface treatment agent and hot melt on the inner side 21 of the injection housing 2 Glue or PU solvent glue. The second type of surface treatment is to first treat the inner side 21 of the injection housing 2 with atmospheric plasma, and then apply hot-melt adhesive or PU solvent adhesive. Thus, it can be seen that the present invention first uses a surface treatment agent or atmospheric plasma treatment to destroy the surface of the inner side 21 of the injection shell 2, and then coats the hot melt adhesive or PU solvent adhesive, and the injection shell is increased by the hot melt adhesive or PU solvent adhesive. The bonding strength of both the inner surface 21 of the 2 and the elastic foam layer 40. The treatment agent is selected according to the material of the injection housing 2.

Claims (10)

A composite shoe accessory manufacturing process includes: injection molding, in which an injection mold is integrally formed by an injection mold to produce an injection shell having one of an inner side and an outer side opposite to each other; a foaming mold is charged, and the injection shell is taken out of the injection mold. Placed in the foaming mold and filled with a plurality of foaming particles in the foaming cavity and stacked on the inner side of the injection shell; foaming molding, pouring heated fluid into the foaming mold to increase the temperature of the foaming particles and Reaching the foaming working temperature of the plurality of foamed particles, so that the outer surfaces of the plurality of foamed particles are physically bonded to each other, and are correspondingly bonded to the inner side of the injection shell to form an elastic foam layer; cooling and shaping, pouring cooling fluid into the foam The temperature of the elastic foam layer is lowered by the mold, so that the elastic foam layer cools and stabilizes the shape and size, and the composite shoe accessories are taken out of the foam mold after completion. The composite shoe accessory manufacturing process according to claim 1, wherein the heating fluid is water vapor of 100°C to 140°C, which is continuously poured into the cavity of the foaming mold for 2 to 4 minutes and contacts the elastic foaming layer; wherein the cooling fluid It is 40°C to 20°C water, and is poured into the cavity of the foaming mold for 80 seconds to 100 seconds and contacts the elastic foaming layer. The manufacturing process of composite shoe accessories as described in claim 2, wherein the injection shell is transparent or opaque, and the injection shell is monochrome or color; wherein the injection shell is TPU, TPAE, nylon, TPO, TPEE, EVA or TPE material; where the elastic foam layer is E-TPU, E-TPEE, E-TPAE, E-TPO, E-TPE, E-EVA single-material foam or composite foam; composite shoe accessories are Hong Kong treasure (Back cover), shoe support (front cover), sole or upper. The composite shoe accessory manufacturing process according to claim 3, wherein there is a surface treatment between the injection molding and the injection of the foaming mold, and the surface treatment is to sequentially apply the surface treatment agent and the hot melt on the inner side of the injection casing Glue or PU solvent glue. The composite shoe accessory manufacturing process as described in claim 3, wherein there is a surface treatment between the injection molding and the foam mold feeding, and the surface treatment is to apply atmospheric plasma treatment on the inner side of the injection casing before The inner side of the injection shell is coated with hot melt adhesive or PU solvent adhesive. The composite shoe accessory manufacturing process according to any one of claim 1 to claim 5, wherein the injection shell and the elastic foam layer have different elastic coefficients, and the thickness of the elastic foam layer is greater than the thickness of the injection shell. A composite shoe accessory, comprising: an injection shell which is integrally formed by injection molding in an injection mold, and the injection shell has an inner side and an outer side opposite to each other; and an elastic foam layer, which consists of a plurality of hairs The foam particles are foam-bonded to the inner side of the injection shell through the foaming mold, and the surfaces of the plurality of foam particles are hot-melt bonded to each other, and the plurality of foam particles are stacked and arranged in a granular shape after foaming. The composite shoe accessory according to claim 7, wherein the injection shell is made of TPU, TPAE, nylon, TPO or TPE, and the injection shell is transparent or opaque, and the injection shell is monochrome or color, The elastic foam layer is a single material foam or a composite foam of E-TPU, E-TPEE, E-TPAE, E-TPO, E-TPE, and E-EVA. The composite shoe accessory according to claim 7 or claim 8, wherein the composite shoe accessory is Hong Kong Bao (back cover), shoe support (front cover), sole or upper. The composite shoe accessory according to claim 9, wherein the injection shell and the elastic foam layer have different elastic coefficients, and the thickness of the elastic foam layer is greater than the thickness of the injection shell.

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