CN111660569B

CN111660569B - Air bag for shoes and processing technology thereof

Info

Publication number: CN111660569B
Application number: CN202010335098.1A
Authority: CN
Inventors: 蔡清来; 杨鑫杰; 郭献招
Original assignee: Fujian World Linking Technology Co ltd; Sincetech Fujian Technology Co Ltd
Current assignee: Fujian World Linking Technology Co ltd; Sincetech Fujian Technology Co Ltd
Priority date: 2020-04-24
Filing date: 2020-04-24
Publication date: 2022-04-08
Anticipated expiration: 2040-04-24
Also published as: CN111660569A

Abstract

The invention relates to the technical field of air bags, in particular to an air bag for shoes, which comprises an upper film and a lower film, wherein the upper film can completely cover the lower film, and an air bag cavity is formed between the upper film and the lower film. The air bag consists of an upper film and a lower film, the upper film and the lower film are not in equal areas and are not in equal shapes which can be scaled in equal proportion, but the shapes and the areas of the upper film can completely exceed and cover the lower film, when the air bag is combined with the shoe and clothes, the upper film with larger shapes and areas is exposed to the peripheral public, and the lower film is hidden between the upper film and the clothes, so that the flatness of the combination part of the shoe and the air bag is ensured; in the hot pressing process, the lower film edge is in hot pressing combination with the vamp, the upper film edge is in hot pressing combination with the lower film to form the air bag, and the outward-expanding edge is in hot pressing combination with the vamp, so that the air bag is formed and is in hot pressing combination with the vamp by covering the edge, the air tightness is improved, and the air leakage phenomenon is not easy to occur.

Description

Air bag for shoes and processing technology thereof

Technical Field

The invention relates to the technical field of airbags, in particular to an airbag for shoes and a processing technology thereof.

Background

Inflatable articles of manufacture or bladders for inflatable articles of manufacture have been known for decades. Such articles of manufacture include inflatable air mattresses and pillows, life boats and life rings, and sporting equipment. In the field of athletic equipment, airbags have been incorporated into the interior of balls (such as basketballs, footballs, soccer balls, etc.), as well as into apparel and protective equipment such as baseball and boxing gloves, helmets, chest protectors and footwear.

When used in footwear, for example, the bladder may be used to provide customized cushioning and improved fit for the foot of the wearer. In some cases, the bladder may replace the lace to secure the shoe to the wearer's foot. Air bladders may also be used in the sole of footwear to cushion the bottom of a wearer's foot and absorb impact forces from walking, running, and jumping.

The vamp air bag which is common in the existing market can be formed by two TPU films through processes such as hot pressing and the like. The two sheets of TPU film are also attached to each other at multiple circular locations to control the thickness of the bladder to prevent uncontrolled "ballooning" that can cause discomfort to the wearer or non-conformance to the upper.

The basic construction and processing of air bags, whether they are used in footwear or other types of apparel, is well known, i.e., two sheets of TPU film of the same shape and area are processed into air bags by hot pressing or hot pressing with hot melt adhesive applied to the edge junction of the two sheets of TPU film.

This practice ensures the manufacture of air-bags, but when used in footwear (apparel and protective equipment such as baseball and boxing gloves, helmets, chest protectors and footwear) has the following disadvantages: (1) the thickness difference of two layers of TPU films is obvious at the joint of the edge of the air bag and the shoe garment, so that the flatness of the joint of the shoe garment and the air bag is low; (2) due to the technical problem, part of the air bags are only hot-pressed by two TPU films with the same shape and area, and the air leakage phenomenon is easy to generate when the air bags are used for shoes and clothes through the movement and extrusion of a wearer; (3) common air bags in the market at present need to be manufactured into air bags by two TPU films with the same shape and size, and then the air bags can be combined to vamps through hot pressing or other modes, so that the processing technology is not convenient.

Disclosure of Invention

The invention aims to overcome the defects and provide an air bag for shoes.

In order to achieve the purpose, the technical solution of the invention is as follows: an air bag for shoes comprises an upper film and a lower film, wherein the upper film can completely cover the lower film, and an air bag cavity is formed between the upper film and the lower film. The air bag consists of an upper film and a lower film, the upper film is exposed to the public, the lower film is hidden between the upper film and the clothes, and the upper film covers the lower film, so that the flatness of the joint of the shoe clothes and the air bag is ensured.

Preferably, the area of the upper membrane is larger than the area of the lower membrane. After the air bag is combined with the shoe and garment, the upper film with a larger area is exposed to the public, the lower film with a smaller area is hidden between the upper film and the garment, in the hot pressing process, the edge of the lower film is in hot pressing combination with the vamp, the edge of the upper film is in hot pressing combination with the lower film to form the air bag, and the edge of the upper film is also in hot pressing combination with the vamp, so that the air bag is formed and is covered on the vamp by the edge in a hot pressing manner, the air tightness is improved, and the air leakage phenomenon is not easy to generate.

Preferably, the shape of the upper membrane is identical to the shape of the lower membrane.

Preferably, the shape of the upper membrane does not conform to the shape of the lower membrane. After the air bag is combined with the shoe and garment, the upper film with a larger shape is exposed to the public, while the lower film with a smaller shape is hidden between the upper film and the garment.

Preferably, the upper and lower films are each coated with a bonding agent that is adhesive and capable of bonding the two films in a hot pressing process.

Preferably, the bonding agent is hot melt adhesive.

Preferably, both the upper and lower films may be formed from various polymers, for example: thermoplastic resins, elastomeric materials, thermoset materials, and composites thereof, including Thermoplastic Polyurethane (TPU), ethylene vinyl acetate copolymers, polyethylene copolymers, polyester elastomers, polyethylene, polypropylene, neoprene, natural rubber, dacron, polyester, polyvinyl chloride, thermoplastic rubber, nitrile rubber, butyl rubber, vulcanized rubber, methyl rubber, silicone rubber, polyvinyl acetate, nitrile rubber, styrene butadiene rubber, polystyrene, ethylene propylene, polybutadiene, chlorosulfonated polyethylene, nylon, partially cured thermoset materials, ethylene vinyl acetate copolymer (EVA) foam, thermoset rubber, prepreg, and the like.

The invention also provides a processing technology of the air bag for the shoe wear, which comprises the following steps:

A. preparation of a mold: preparing a die, wherein the die comprises a first female die, a male die and a second female die, a fabric area, a first air bag concave area, a first air pipe concave area, a first stabilizing point and a positioning pin are arranged on the first female die, an air bag convex area, an air pipe convex area, a second stabilizing point and a first positioning hole are arranged on the male die, and a second air bag concave area, a second air pipe concave area, a third stabilizing point and a second positioning hole are arranged on the second female die;

B. primary hot pressing: placing the vamp to be processed on a fabric area, inserting a positioning pin into a through hole at the edge of the vamp to be processed, accurately positioning, aligning the positioning pin through a first positioning hole to cover a male die on a first female die to form a first die, and placing the first die in a high-frequency fusion machine for hot pressing (the hot pressing temperature is 100-200 ℃, and the pressure value is 0.1-0.5 Mpa);

C. secondary hot pressing: after primary hot pressing, the male die is removed, a placing space for accommodating the air bag is formed in the vamp to be processed in a hot pressing mode, the air bag is combined with the vamp more tightly, then the lower film is placed in the placing space, the upper film is covered on the lower film, the second female die is covered on the first female die through the second positioning hole aligning positioning pin, a second die is formed, and the second die is placed in a high-frequency fusion machine for hot pressing (the hot pressing temperature is 100-200 ℃, and the pressure value is 0.1-0.5 Mpa);

D. taking out a finished product: and taking out the shoe to complete the combination of the vamp and the air bag.

Preferably, the processing technology of the air bag for the shoe wear comprises the following steps:

A. preparation of a mold: preparing a die, wherein the die comprises a first female die and a second female die, a fabric area and a positioning pin are arranged on the first female die, and a second positioning hole is arranged on the second female die;

B. hot pressing: placing the vamp to be processed on a fabric area, inserting a positioning pin into a through hole at the edge of the vamp to be processed, accurately positioning, then placing a lower film on a placing space, covering an upper film on the lower film, aligning the positioning pin through a second positioning hole, covering a second female die on the first female die to form a matched die, and placing the matched die in a high-frequency fusion machine for hot pressing (the hot pressing temperature is 100-200 ℃, and the pressure value is 0.1-0.5 Mpa);

C. taking out a finished product: and taking out the shoe to complete the combination of the vamp and the air bag.

C. secondary hot pressing: after primary hot pressing, removing the male die, taking out the vamp, placing the upper film in a manner of being matched with the first air bag concave area, placing the lower film in a manner of being matched with the first air bag concave area, aligning the positioning pin through a through hole in the edge of the vamp, inverting the vamp, accurately placing the vamp on the fabric area through calibration and positioning, covering the second female die on the first female die through aligning the positioning pin through the second positioning hole to form a second die, and placing the second die in a high-frequency fusion machine for hot pressing (the hot pressing temperature is 100-200 ℃, and the pressure value is 0.1-0.5 Mpa);

Preferably, the hot pressing temperature of the high-frequency fusion machine is 100-200 ℃, and the pressure value is 0.1-0.5 Mpa.

By adopting the technical scheme, the invention has the beneficial effects that:

(1) the upper film and the lower film of the two films forming the air bag are not equal in area and can not be equal in shape capable of being scaled in equal proportion, but at least the shape and the area of the upper film can completely exceed and cover the lower film, when the air bag is combined with the shoe and garment, the upper film with larger shape and area is exposed to the public at the periphery, the lower film is hidden between the upper film and the garment, and the upper film covers the lower film, so that the flatness of the combination part of the shoe and the air bag is ensured.

(2) In the hot pressing process, the lower film edge is in hot pressing combination with the vamp, the upper film edge is in hot pressing combination with the lower film to form the air bag, and the outward-expanding edge is in hot pressing combination with the vamp, so that the air bag is formed and is in hot pressing combination with the vamp by covering the edge, the air tightness is improved, and the air leakage phenomenon is not easy to occur.

(3) In the hot pressing process, the air bag and the shoe and clothes are molded simultaneously, so that the processing process is reduced.

Drawings

FIG. 1 is a schematic view of the construction of the bladder of the present invention;

FIG. 2 is a schematic structural view of the bladder in combination with the upper of the present invention;

FIG. 3 is a schematic structural diagram of a first female die of the present invention;

FIG. 4 is a schematic structural view of the male die of the present invention;

FIG. 5 is a schematic structural view of a second female die of the present invention;

FIG. 6 is a schematic structural view showing the mold and the upper stacked together during one hot pressing according to the present invention;

FIG. 7 is a schematic structural view showing the arrangement of the mold and the upper during the secondary hot pressing.

Description of the main reference numerals: (1, upper membrane; 2, lower membrane; 3, airbag cavity; 4, first female die; 41, fabric region; 42, first stabilizing point; 43, positioning pin; 44, first airbag concave region; 45, first trachea concave region; 5, male die; 51, second stabilizing point; 52, first positioning hole; 53, airbag convex region; 54, trachea convex region; 6, second female die; 61, second airbag concave region; 62, second trachea concave region; 63, third stabilizing point; 64, second positioning hole; 7, vamp).

Detailed Description

The invention is further described below with reference to the figures and the specific embodiments.

The directional phrases used in this disclosure include, for example: upper, lower, inner, outer, etc., are referred to in the description only in the direction of fig. 1. Accordingly, the directional terminology used is intended to be illustrative only and is not intended to be limiting of the invention.

Example 1

As shown in figures 1-2, the air bag for the shoes comprises an upper film 1 and a lower film 2, wherein the upper film 1 can completely cover the lower film 2, and an air bag cavity 3 is formed between the upper film 1 and the lower film 2. The air bag consists of an upper film 1 and a lower film 2, wherein the upper film 1 is exposed to the public, the lower film 2 is hidden between the upper film 1 and the clothes, and the upper film 1 covers the lower film 2, so that the flatness of the joint of the shoes, the clothes and the air bag is ensured.

The area of the upper membrane 1 is larger than that of the lower membrane 2. After the air bag is combined with the shoe and garment, the upper film 1 with a larger area is exposed to the outside and seen by the public, the lower film 2 with a smaller area is hidden between the upper film 1 and the garment, in the hot-pressing process, the edge of the lower film 2 is hot-pressed on the vamp 7, the edge of the upper film 1 is hot-pressed on the vamp 7 while the air bag is formed by the hot-pressed lower film 2, and the expanded edge is hot-pressed on the vamp 7, so that the air bag is formed and is hot-pressed on the vamp 7 by covering the edge, the air tightness is improved, and the air leakage phenomenon is not easy to generate.

The shape of the upper membrane 1 may not coincide with the shape of the lower membrane 2. After the air bag is combined with the shoe and garment, the upper film 1 with a larger area is exposed to the outside and seen by the public, the lower film 2 with a smaller area is hidden between the upper film and the garment, in the hot pressing process, the edge of the lower film 2 is hot-pressed and combined on the vamp 7, the edge of the upper film 1 is hot-pressed and extended on the vamp 7 while the air bag is formed by the hot-pressed and combined lower film 2, so that the air bag is formed and is hot-pressed on the vamp 7 by covering the edge, the air tightness is improved, and the air leakage phenomenon is not easy to generate.

The upper and

lower films

1 and 2 are coated with a bonding agent having viscosity and capable of bonding the two films in a hot pressing process.

The bonding agent is a hot melt adhesive, and other adhesives or bonding agents can be used besides the hot melt adhesive as long as the adhesives or bonding agents have viscosity and can bond the two films in the hot pressing process.

The upper and

lower films

1, 2 may each be formed from various polymers, for example: thermoplastic resins, elastomeric materials, thermoset materials, and composites thereof, including Thermoplastic Polyurethane (TPU), ethylene vinyl acetate copolymers, polyethylene copolymers, polyester elastomers, polyethylene, polypropylene, neoprene, natural rubber, dacron, polyester, polyvinyl chloride, thermoplastic rubber, nitrile rubber, butyl rubber, vulcanized rubber, methyl rubber, silicone rubber, polyvinyl acetate, nitrile rubber, styrene butadiene rubber, polystyrene, ethylene propylene, polybutadiene, chlorosulfonated polyethylene, nylon, partially cured thermoset materials, ethylene vinyl acetate copolymer (EVA) foam, thermoset rubber, prepreg, and the like.

As shown in fig. 3 to 7, the present embodiment further provides a process for manufacturing an airbag for footwear, including the steps of:

A. preparation of a mold: preparing a die, wherein the die comprises a first female die 4, a male die 5 and a second female die 6, a fabric area 41, a first air bag concave area 44, a first air pipe concave area 45, a first stabilizing point 42 and a positioning pin 43 are arranged on the first female die 4, an air bag convex area 53, an air pipe convex area 54, a second stabilizing point 51 and a first positioning hole 52 are arranged on the male die 5, and a second air bag concave area 61, a second air pipe concave area 62, a third stabilizing point 63 and a second positioning hole 64 are arranged on the second female die 6;

B. primary hot pressing: placing the vamp 7 to be processed on the fabric area 41, inserting the positioning pin 43 into the through hole at the edge of the vamp 7 to be processed, accurately positioning, aligning the positioning pin 43 through the first positioning hole 52 to cover the male die 5 on the first female die 4 to form a first die, and placing the first die in a high-frequency fusion machine for hot pressing (the hot pressing temperature is 100-200 ℃, and the pressure value is 0.1-0.5 Mpa);

C. secondary hot pressing: after primary hot pressing, the male die 5 is removed, a placing space for accommodating an air bag is formed in the vamp 7 to be processed in a hot pressing mode, the air bag is combined with the vamp 7 more tightly, then the lower film 2 is placed in the placing space, the upper film 1 is covered on the lower film 2, the second female die 6 is covered on the first female die 4 by aligning the second positioning hole 64 with the positioning pin, a second die is formed, and the second die is placed in a high-frequency fusion machine for hot pressing (the hot pressing temperature is 100-200 ℃, and the pressure value is 0.1-0.5 Mpa);

D. taking out a finished product: and taking out to complete the combination of the vamp 7 and the air bag.

Wherein, the material to be processed in the embodiment is the vamp 7. The steel adopted by the die is medium carbon alloy steel, has enough hardness and wear resistance, enough strength and toughness, good processing performance and good pattern erodibility.

The fabric area 41 is formed by etching a fine groove or a raised line with the same shape and size as the vamp 7 to be processed on the first concave die 4, and is used for placing the vamp 7 to be processed in a calibration position.

The first air bag concave area 44 is a groove which is etched on the first concave die 4 and has the same shape and volume as the air bag cavity 3 to be formed, and is used for forming a placement space of the air bag on the vamp 7 in a hot-press forming mode.

The first air duct concave area 45 is a groove which is etched on the first concave die 4 and has the same diameter and volume with an air duct (not shown, the air duct is a common component in the air bag inflation and deflation structure) to be combined, and is used for placing a space for hot-press forming the air duct on the vamp 7.

The first stabilizing points 42 are a plurality of convex columns which are etched and remain in the first air bag concave area 44, the height of the convex columns is equal to the height of the upper surface of the first concave die 4, and the upper end part of the convex columns is circular. The upper and

lower membranes

1, 2 are attached to each other at a plurality of circular locations to control the thickness of the air-bag to prevent uncontrolled "ballooning" which can cause discomfort to the wearer or non-conformance to the upper 7, the first stabilization point corresponding to the several attachment locations of the upper and

lower membranes

1, 2.

The positioning pins 43 are used in the well-known technology of the mold structure, and the positioning pins 43 are small columnar protrusions and used for positioning the mold during mold closing so as to ensure that the relative position between the male mold and the female mold is accurate and does not deviate.

The convex area 53 of the air bag is a boss which is etched on the convex die 5 and has the same shape and volume as the cavity 3 of the air bag to be formed, and is used for matching with the concave area 44 of the first air bag to form a placing space of the air bag on the vamp 7 by hot-press forming.

The air pipe convex area 54 is a boss with the same diameter and volume as the air pipe to be combined (not shown in the figure, the air pipe is a common component in the air bag inflation and deflation structure) etched on the male die 5, and is used for matching with the first air pipe concave area 45 to form a placement space of the air outlet pipe on the vamp 7 in a hot-press forming mode.

The second stable points 51 are a plurality of grooves which are etched and remain in the convex region 53 of the airbag, the depth of the grooves is consistent with the height of the convex region 53 of the airbag, and the upper end and the lower end of the grooves are circular. The protrusion for matching the first stable point 42 makes the first concave die 4 and the convex die 5 have no gap when the die is closed.

The second air bag concave area 61 is a groove which is etched on the second concave die 6 and has the same shape and volume with the air bag cavity 3 to be formed, and is used for hot-pressing and combining the air bag on the vamp 7.

The second air pipe concave area 62 is a groove with the same diameter and volume as the air pipe to be combined, which is etched on the second concave die 6, and is used for matching with the placement space of the air outlet pipe formed by hot-pressing the first air pipe concave area 45 on the vamp 7.

The third stable points 63 are a plurality of convex columns which are remained in the concave area 61 of the second air bag after etching, the height of the convex columns is equal to the upper surface of the second concave die 6, and the upper end part of the convex columns is circular. The upper and

lower membranes

1, 2 are attached to each other at a plurality of circular locations to control the thickness of the air bag to prevent uncontrolled "ballooning" which can cause discomfort to the wearer or non-conformance to the upper 7, the third stabilization points 63 corresponding to the several attachment locations of the upper and

lower membranes

1, 2.

The first positioning holes 52 are well-known technology application in the mold structure, and the plurality of first positioning holes 52 are in a hole shape, have the depth size matched with the positioning pins 43, and are used for being matched with the positioning pins 43 when the mold is closed, so that the mold is positioned to ensure that the relative position between the male mold and the female mold is accurate and does not deviate.

The second positioning holes 64 are used in the known technology of the mold structure, and the second positioning holes 64 are in the shape of holes, have the depth matched with the positioning pins 43, and are used for matching with the positioning pins 43 when the mold is closed, so as to position the mold to ensure that the relative positions of the male mold and the female mold are accurate and do not deviate.

Example 2

The shape of the upper membrane 1 is identical to the shape of the lower membrane 2.

The upper and

lower films

The upper and

lower films

A. preparation of a mold: preparing a die, wherein the die comprises a first female die 4 and a second female die 6, a fabric area 41 and a positioning pin 43 are arranged on the first female die 4, and a second positioning hole 64 is arranged on the second female die 6;

B. hot pressing: placing the vamp 7 to be processed on the fabric area 41, inserting the positioning pin 43 into the through hole at the edge of the vamp 7 to be processed, accurately positioning, then placing the lower film 2 on the placing space, covering the upper film 1 on the lower film 2, aligning the positioning pin 43 through the second positioning hole 64, covering the second female die 6 on the first female die 4, forming a die, and placing the die in a high-frequency fusion machine for hot pressing (the hot pressing temperature is 100-200 ℃, and the pressure value is 0.1-0.5 Mpa);

C. taking out a finished product: and taking out to complete the combination of the vamp 7 and the air bag.

Example 3

The shape of the upper membrane 1 may not coincide with the shape of the lower membrane 2. After the air bag is combined with the shoe and garment, the upper film 1 with a larger area is exposed to the outside and seen by the public, the lower film 2 with a smaller area is hidden between the upper film 1 and the garment, in the hot-pressing process, the edge of the lower film 2 is hot-pressed on the vamp 7, the edge of the upper film 1 is hot-pressed on the vamp 7 while the air bag is formed by the hot-pressed lower film 2, and the expanded edge is hot-pressed on the vamp 7, so that the air bag is formed and is hot-pressed on the vamp 7 by covering the edge, the air tightness is improved, and the air leakage phenomenon is not easy to generate.

The upper and

lower films

The upper and

lower films

C. secondary hot pressing: after primary hot pressing, the male die 5 is removed, the vamp 7 is taken out, the upper film 1 is placed in a manner of being matched with the first air bag concave area 44, the lower film 2 is placed in a manner of being matched with the first air bag concave area 44, then the positioning pin 43 is aligned through a through hole in the edge of the vamp 7, the vamp 7 is inverted and accurately placed on the fabric area 41 through calibration positioning, the second positioning hole 64 is aligned with the positioning pin 43 to cover the second female die 6 on the first female die 4 to form a second die, and the second die is placed in a high-frequency fusion machine for hot pressing (the hot pressing temperature is 100-200 ℃, and the pressure value is 0.1-0.5 Mpa);

lower membranes

1, 2.

lower membranes

1, 2.

The above description is only a preferred embodiment of the present invention, and should not be taken as limiting the scope of the present invention, and all equivalent variations and modifications made in the claims of the present invention should be included in the scope of the present invention.

Claims

1. A processing technology of an air bag for shoes, which is characterized in that: the method comprises the following steps:

B. primary hot pressing: placing the fabric to be processed on a fabric area, inserting a positioning pin into a through hole in the edge of the fabric to be processed, after accurate positioning is carried out, aligning the positioning pin through a first positioning hole, covering a male die on a first female die to form a first die, and placing the first die in a high-frequency fusion machine for hot pressing;

C. secondary hot pressing: after primary hot pressing, the male die is removed, a placing space for accommodating the air bag is formed on the fabric to be processed in a hot pressing mode, then the lower film is placed on the placing space, the upper film is covered on the lower film, the second female die is covered on the first female die through the second positioning hole aligning with the positioning pin, a second die is formed, and the fabric is placed in a high-frequency fusion machine for hot pressing;

D. taking out a finished product: taking out to complete the combination of the fabric and the air bag;

wherein the content of the first and second substances,

the first stable points are a plurality of convex columns which are reserved in the concave area of the first air bag after etching, and the height of the convex columns is equal to the upper surface of the first concave die;

the second stable points are a plurality of grooves which are reserved in the convex area of the air bag after etching, and the depth of the grooves is consistent with the height of the convex area of the air bag;

the third stable points are a plurality of convex columns which are reserved in the concave area of the second air bag after etching, and the height of the convex columns is equal to the height of the upper surface of the second concave die.

2. The process for manufacturing an airbag for footwear according to claim 1, wherein: the method comprises the following steps:

C. secondary hot pressing: after primary hot pressing, the male die is removed, the fabric is taken out, the upper film is placed in a manner of being matched with the first air bag concave area, the lower film is placed in a manner of being matched with the first air bag concave area, then the positioning pin is aligned through a through hole in the edge of the fabric, the fabric is inverted and accurately placed on the fabric area through calibration and positioning, then the second female die is covered on the first female die through the alignment of the second positioning hole and the positioning pin, a second die is formed, and the second die is placed in a high-frequency fusion machine for hot pressing;

D. taking out a finished product: and taking out to complete the combination of the fabric and the air bag.

3. The process for manufacturing an airbag for footwear according to claim 1 or 2, wherein: the hot pressing temperature of the high-frequency fusion machine is 100-200 ℃, and the pressure value is 0.1-0.5 Mpa.