Combined insole and preparation method thereof

Abstract

The present invention provides a combined insole and a preparation method thereof, comprising an insole body, the insole body comprising a forefoot portion, an arch portion and a rear foot portion, a support pad being arranged at the arch portion, a TPU film being arranged at the bottom end of the insole body, the TPU film wrapping the bottom end surface of the insole body, the TPU film being below the support pad, the thickness of the TPU film being 0.01-0.5 mm, and the combined insole being processed by integral injection molding using a molding die. The present invention provides a combined insole and a preparation method thereof, in which a support pad matching the shape of the human arch is arranged at the arch position of the insole in a combined manner, the insole is more comfortable to wear, has a good shape-keeping effect, and can support and protect the human arch. In addition, a TPU film layer is arranged at the bottom of the insole to increase the friction coefficient of the insole, improve the anti-skid, wear-resistant and anti-deformation properties of the insole, and increase the service life of the insole. The insole is integrally injected and molded using a molding die to ensure the integrity of the insole.

Description

Technical Field

[0001] The invention relates to the technical field of insole processing, in particular to a combined insole and a preparation method thereof. Background Art

[0002] As one of the most commonly used daily necessities, insoles are widely used. Currently, most of the existing insoles in the world are a structure of a layer of chemical fiber fabric attached to a layer of soft plastic. This kind of insole has a single function. When people exercise, the stress and pressure of different parts of the sole of the foot are different. Long-term use of this single insole is likely to lead to insufficient comfort of the sole of the foot. In addition, this single insole is also easy to deform after long-term use and has poor wear resistance. Summary of the invention

[0003] The purpose of the present invention is to provide a combined insole and a preparation method thereof to solve the technical problems in the background technology.

[0004] To achieve the aforementioned object, the present invention provides the following technical solutions:

[0005] A combined insole comprises an insole main body, the insole main body comprises a forefoot portion, an arch portion and a rear foot portion, a supporting pad is arranged at the arch portion, a TPU film is arranged at the bottom end of the insole main body, the TPU film wraps the bottom end surface of the insole main body, the TPU film is below the supporting pad, and the thickness of the TPU film is 0.01-0.5 mm.

[0006] The support gasket comprises a support body and an anti-twist portion which is arranged on one side of the support body and protrudes upwards, the anti-twist portion matches the inner arc of the arch of the foot, and the support body is below the insole body.

[0007] An opening is provided at the heel position of the support body, and the rear foot portion of the insole body is in the opening.

[0008] The supporting body is provided with a plurality of long holes.

[0009] At least one anti-slip strip is arranged on the anti-twist portion.

[0010] The support pad is made of one selected from EVA, TPU, plastic, resin and silica gel.

[0011] The insole body, the supporting pad and the TPU film are integrally formed by injection molding using a molding mold.

[0012] A method for preparing a combined insole comprises the following processing steps:

[0013] Step S1, placing the TPU film into a molding mold, the molding mold includes an upper mold and a lower mold, the lower mold is provided with a mold cavity, and the TPU film is placed in the mold cavity of the lower mold for fixed positioning;

[0014] Step S2, placing the support pad into the mold cavity of step S1 and above the TPU film;

[0015] Step S3, closing the upper mold and the lower mold, and pouring polyurethane stock solution into the mold cavity;

[0016] Step S4, vulcanization treatment and then demoulding.

[0017] The mold cavity of the lower mold is provided with a plurality of adsorption holes for adsorbing the TPU film, and the adsorption holes are connected to the vacuum generator. The mold cavity of the lower mold is provided with an inner groove for placing a support gasket, and the inner groove matches the outer dimensions of the support gasket.

[0018] In the step S3, the molding die is heated before the polyurethane stock solution is poured, and the heating temperature is 80°C-150°C.

[0019] Compared with the prior art, the combined insole and the preparation method thereof provided by the present invention adopt a combined manner, and a supporting gasket matching the shape of the human arch is provided at the arch position of the insole. The insole is more comfortable to wear and has a good shape-keeping effect. The arch of the human arch can be supported and protected to prevent sprains. In addition, a TPU film layer is provided at the bottom of the insole to increase the friction coefficient of the insole, improve the anti-slip, wear resistance and deformation resistance of the insole, and increase the service life of the insole. The insole is integrally cast by a molding mold to ensure the integrity of the insole. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 : A schematic diagram of a combined insole structure;

[0021] Figure 2 : Schematic diagram of the support gasket structure;

[0022] Figure 3 : A schematic diagram of a combined insole material layer structure;

[0023] Figure 4 : A schematic diagram of the molding die structure of a combined insole. DETAILED DESCRIPTION

[0024] The technical solutions in the embodiments of the present invention will be described clearly and completely below in conjunction with the accompanying drawings in the embodiments of the present invention.

[0025] Specific embodiment 1: Please refer to Figures 1 to 4In an embodiment of the present invention, a combined insole includes an insole body 1, wherein the insole body 1 includes a forefoot portion 101, an arch portion 102 and a rear foot portion 103, wherein a supporting pad 2 is provided at the arch portion 102, and a TPU film 3 is provided at the bottom end of the insole body 1, wherein the TPU film 3 wraps the bottom end surface of the insole body 1, and the TPU film 3 is below the supporting pad 2, and the thickness of the TPU film 3 is 0.01-0.5 mm.

[0026] The support gasket 2 includes a support body 201 and an anti-twist portion 202 which protrudes upward on one side of the support body 201. The anti-twist portion 202 cooperates with the inner arc of the arch of the foot. The support body 201 is below the insole body 1. The anti-twist portion 202 strengthens the overall supporting effect of the support gasket 2 and plays a protective supporting role for the arc position of the human arch of the foot.

[0027] The support body 201 is provided with an opening 201-2 at the heel position, and the rear foot portion 103 of the insole body 1 is in the opening 201-2, ensuring the softness of the contact between the heel on the sole of the human foot and the rear foot portion 103 of the insole, and playing a role in buffering and shock absorbing the heel of the human body.

[0028] The support body 201 is provided with a plurality of elongated holes 201 - 1 , forming an elastic supporting space for the support body 201 .

[0029] The anti-twist portion 202 is provided with at least one anti-slip strip 202 - 1 .

[0030] The support pad 2 is made of one selected from EVA, TPU, plastic, resin and silica gel.

[0031] The insole body 1 , the supporting pad 2 and the TPU film 3 are integrally formed by injection molding using a molding mold 4 .

[0032] A method for preparing a combined insole comprises the following processing steps:

[0033] Step S1, placing the TPU film 3 into a molding mold 4, the TPU film 3 has been cut into a size that matches the size of the insole, the molding mold 4 includes an upper mold 401 and a lower mold 402, the lower mold 402 is provided with a mold cavity 402-1 that matches the shape of the insole, the mold cavity 402-1 of the lower mold 402 is provided with a plurality of adsorption holes 402-1-1 for adsorbing the TPU film 3, the adsorption holes 402-1-1 are connected to a vacuum generator, and the TPU film 3 is placed in the mold cavity 402-1 of the lower mold 402 and is adsorbed and fixed through the adsorption holes 402-1-1;

[0034] Step S2, placing the support gasket 2 into the mold cavity 402-1 of step S1 and above the TPU film 3, and providing an inner groove 402-1-2 for placing the support gasket 2 in the mold cavity 402-1 of the lower mold 402, wherein the inner groove 402-1-2 matches the outer dimensions of the support gasket 2;

[0035] Step S3, closing the upper mold 401 and the lower mold 402, pouring polyurethane stock solution into the mold cavity 402-1, and closing the adsorption hole 402-1-1 to adsorb the TPU film 3 while pouring the polyurethane stock solution;

[0036] Step S4, vulcanization treatment and then demoulding.

[0037] In the step S3, the forming mold 4 is heated before pouring the polyurethane stock solution, and the heating temperature is 80°C-150°C.

[0038] Compared with the prior art, the combined insole and the preparation method thereof provided by the present invention adopt a combined manner, and a supporting gasket matching the shape of the human arch is provided at the arch position of the insole. The insole is more comfortable to wear and has a good shape-keeping effect. The arch of the human arch can be supported and protected to prevent sprains. In addition, a TPU film layer is provided at the bottom of the insole to increase the friction coefficient of the insole, improve the anti-slip, wear resistance and deformation resistance of the insole, and increase the service life of the insole. The insole is integrally cast by a molding mold to ensure the integrity of the insole.

[0039] It will be apparent to those skilled in the art that the invention is not limited to the details of the foregoing exemplary embodiments and that the invention can be implemented in other specific forms without departing from the spirit or essential features of the invention. Therefore, the embodiments should be considered in all respects as exemplary and non-restrictive, and the scope of the invention is defined by the appended claims rather than the foregoing description, and it is intended that all variations falling within the meaning and scope of the equivalent elements of the claims be included in the invention. Any reference numeral in a claim should not be considered as limiting the claim to which it relates.

[0040] In addition, it should be understood that although the present specification is described according to implementation modes, not every implementation mode contains only one independent technical solution. This description of the specification is only for the sake of clarity. Those skilled in the art should regard the specification as a whole. The technical solutions in each embodiment may also be appropriately combined to form other implementation modes that can be understood by those skilled in the art.

Claims

1. A combined insole, characterized in that: The invention comprises an insole body, wherein the insole body comprises a forefoot part, an arch part and a rear foot part, wherein a support pad is arranged at the arch part, and a TPU film is arranged at the bottom end of the insole body, wherein the TPU film wraps the bottom end surface of the insole body, and the TPU film is below the support pad, and the thickness of the TPU film is 0.01-0.5 mm; the support pad comprises a support body and an anti-twist part protruding upwardly provided on one side of the support body, wherein the anti-twist part cooperates with the arc shape of the inner side of the arch, and the support body is below the insole body; an opening is arranged at the heel position of the support body, and the rear foot part of the insole body is in the opening; a plurality of long strip holes are arranged on the support body, and the combined insole comprises the following preparation method: Step S1, placing the TPU film into a molding mold, the molding mold includes an upper mold and a lower mold, the lower mold is provided with a mold cavity, the TPU film is placed in the mold cavity of the lower mold for fixed positioning; the mold cavity of the lower mold is provided with a plurality of adsorption holes for adsorbing the TPU film, the adsorption holes are connected to a vacuum generator, the mold cavity of the lower mold is provided with an inner groove for placing a support gasket, and the inner groove matches the outer dimensions of the support gasket; Step S2, placing the support pad into the mold cavity of step S1 and above the TPU film; Step S3, closing the upper mold and the lower mold, and pouring polyurethane stock solution into the mold cavity; Step S4, vulcanization treatment and then demoulding.

2. A combined insole according to claim 1, characterized in that: At least one anti-slip strip is arranged on the anti-twist portion.

3. The combined insole according to claim 1, characterized in that: The supporting gasket is made of one selected from plastic, resin and silica gel.

4. The combined insole according to claim 1, characterized in that: The support pad is made of one selected from EVA and TPU.

5. The combined insole according to claim 1, characterized in that: The insole body, the supporting pad and the TPU film are integrally formed by injection molding using a molding mold.

6. The combined insole according to claim 1, characterized in that: In the step S3, the molding die is heated before the polyurethane stock solution is poured, and the heating temperature is 80°C-150°C.

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