CN113174027B

CN113174027B - Combined insole, forming device and forming process thereof

Info

Publication number: CN113174027B
Application number: CN202110506623.6A
Authority: CN
Inventors: 江羚
Original assignee: Guangdong Zuji Footwear Co ltd
Current assignee: Guangdong Zuji Footwear Co ltd
Priority date: 2021-05-10
Filing date: 2021-05-10
Publication date: 2022-12-16
Anticipated expiration: 2041-05-10
Also published as: CN113174027A

Abstract

The utility model relates to a modular shoe-pad and forming device and forming process thereof belongs to the field of shoes material articles for use, and a modular shoe-pad includes interconnect's support piece, bubble cotton and cushion, the cushion is made by the cushion mixture that contains polyether polyol combined material and diphenylmethane diisocyanate, polyether polyol combined material is made by the raw materials that contain: polyether polyol A, polyether polyol B, polyether polyol C, a foam stabilizer, a catalyst, water, a hardener, a cross-linking agent and triclosan; a forming device of a combined insole comprises an upper die, a middle die and a lower die which are rotatably connected at the same end and sequentially arranged, wherein the upper die and the middle die are fixed through a locking piece; the application has the effect of improving the odor-resistant and mildew-resistant performance of the insole.

Description

Combined insole, forming device and forming process thereof

Technical Field

The application relates to the field of shoe material supplies, in particular to a combined insole, a forming device and a forming process thereof.

Background

The insole is a part of the shoe, which is most tightly attached to the foot, and is used for absorbing the weight of the body and absorbing the acting force and the reacting force generated by the foot and the ground when walking; with the progress of technology, people continuously pay attention to the improvement of the insoles, the main direction is to improve the foot problems, such as heel pain, sole pain and sole pain, and the corresponding correction insoles can be used to achieve good improvement effect on the feet.

The insole is generally arranged in the shoe for a long time, air is not circulated, and sweat on the foot is sometimes secreted on the insole, so that the insole is easy to smell and mildew, and the improvement is needed.

Disclosure of Invention

In order to improve the deodorization and mildew resistance of the insole, the application provides a combined insole, a forming device and a forming process thereof.

In a first aspect, the present application provides a combination insole, which adopts the following technical scheme:

a combined insole comprises a supporting piece, foam and a cushion which are connected with each other, wherein the cushion is prepared from a cushion mixture containing a polyether polyol combined material and diphenylmethane diisocyanate, the weight ratio of the polyether polyol combined material to the diphenylmethane diisocyanate is 100 (55-60), and the polyether polyol combined material is prepared from the following raw materials in parts by weight:

polyether polyol A3~7 parts;

polyether polyol B3~7 parts;

polyether polyol C2~6;

0.2 to 0.6 part of foam homogenizing agent;

8978 parts of catalyst 8978 zxft;

8978 parts of water, namely 1~2 parts;

20 to 50 parts of a curing agent;

5363 parts of a crosslinking agent 4~6;

5363 parts of triclosan 6~8;

the hydroxyl value of the polyether polyol A is 25 to 30mgKOH/g, the molecular weight is 6000 to 8000, and the functionality is 3; the polyether polyol B has a hydroxyl value of 25-28mgKOH/g, a molecular weight of 4000-5000 and a functionality of 2; the polyether polyol C has a hydroxyl value of 28 to 30mgKOH/g, a molecular weight of 5000 to 6000 and a functionality of 3.

By adopting the technical scheme, the triclosan is a phenolic compound and has good sterilization effect, and the addition of the triclosan into the soft pad can improve the mildew-proof and odor-resistant capability of the insole; the elastic force of the cushion can be enhanced by the polyether polyol A, the tensile property of the cushion can be enhanced by the polyether polyol B, the supporting capacity of the cushion can be enhanced by the polyether polyol C, water is used as a foaming agent, compared with the condition that organic liquid is used as the foaming agent, the water is more environment-friendly and nontoxic, the problem of poor material size stability when the water is used as the foaming agent is effectively solved by the matched use of the polyether polyol A, the polyether polyol B and the polyether polyol A, the cushion can still keep good elasticity and strength, and the wearing comfort of the insole is improved.

Optionally, the diphenylmethane diisocyanate is polyether-modified diphenylmethane diisocyanate, and the preparation method of the polyether-modified diphenylmethane diisocyanate comprises the following steps: melting 25-50 parts by weight of 4,4' -diphenylmethane diisocyanate at 120-130 ℃, cooling to 45-50 ℃, adding 6-12 parts by weight of polyether polyol D at 40-45 ℃ and 4~8 parts by weight of polyether polyol E at 40-45 ℃, heating to 65-70 ℃, stirring to 10-20 min, stopping stirring, keeping the temperature for 20-30min, detecting that the NCO% reaches 15-20%, adding 20-40 parts by weight of carbodiimide modified isocyanate, stirring for 20-30min, detecting that the NCO% reaches 20-25%, cooling to 10-40 ℃, and discharging;

the hydroxyl value of the polyether polyol D is 32 to 34 mgKOH/g, the molecular weight is 5000 to 6000, and the functionality is 3; the hydroxyl value of the polyether polyol E is 27 to 28mgKOH/g, the molecular weight is 3000 to 4000, and the functionality is 2.

Through adopting above-mentioned technical scheme, polyether polyol D and polyether polyol E combine with diphenylmethane diisocyanate, have improved the hardness of cushion for the support ability of cushion further improves.

Optionally, the preparation method of the polyether polyol composite material comprises the following steps: the preparation method of the polyether polyol composite material comprises the following steps: mixing and stirring polyether polyol A, polyether polyol B and polyether polyol C, adding a catalyst, water, a hardening agent, a foam stabilizer, a cross-linking agent and triclosan while stirring, stirring for 1~3 minutes under 250-300r/s after the raw materials are added, then stirring for 1~3 minutes under the speed reduction of 100-150r/s to obtain a polyether polyol composite material; the preparation method of the cushion mixture comprises the following steps: and adding the diphenylmethane diisocyanate into the polyether polyol composite material, mixing and stirring, and stirring for 20 to 25s at 450 to 500r/s to obtain the cushion mixture.

By adopting the technical scheme, the polyether polyol A, the polyether polyol B and the polyether polyol C are fully mixed, and the rest raw materials are added, so that the synergistic effect among the polyether polyols can be fully exerted, and the soft cushion with better elasticity and strength is obtained.

Optionally, support piece includes the bottom plate, set up in the back plate of bottom plate one side and set up in the relative both sides of bottom plate and with the curb plate that the back plate is connected, the bottom plate the back plate with the curb plate encloses into the confession the fashioned space of cushion, the cushion part stretches out outside support piece, the bottom plate with one of them the junction arc of curb plate sets up and forms the arch of foot portion, the confession has been seted up to the bottom plate the fixed slot that the cotton card of bubble was gone into.

Through adopting above-mentioned technical scheme, support piece plays the effect of supporting the cushion, helps correcting the foot problem, and the foam can cushion the power that the shoe-pad was transmitted to the shoes, slows down the impact force that the foot received to further improve the comfort of wearing.

Optionally, the foam stabilizer is selected from non-hydrolytic silicone oil surfactants.

By adopting the technical scheme, the non-hydrolytic organic silicone oil surfactant can enable the foaming air holes to be more uniform, and the structural stability of the cushion is improved.

Optionally, the catalyst is selected from triethylenediamine.

By adopting the technical scheme, the triethylene diamine has the function of promoting early foaming.

Optionally, the hardener is selected from ethylene glycol

Through adopting above-mentioned technical scheme, ethylene glycol helps increasing the hardness of cushion, makes the cushion have good holding power.

Optionally, the cross-linking agent is selected from dimethylethanolamine.

Through adopting above-mentioned technical scheme, further improve the tensile ability of cushion.

Optionally, 1 to 15 parts by weight of color paste is also added into the raw materials of the polyether polyol composite material.

Through adopting above-mentioned technical scheme, carry out the colouring to the cushion.

In a second aspect, the present application provides a forming device for a combined insole, which adopts the following technical scheme:

the utility model provides a forming device of modular shoe-pad, includes to rotate at same end and connects and the last mould, well mould and the lower mould that sets gradually, it is provided with into the mould piece to go up the mould, the lower mould is equipped with the location district that is used for supplying support piece to place, and support piece's deckle edge stretches out the location district, well mould seted up with the design groove of shaping piece looks adaptation, well mould towards the one side of lower mould is used for covering the deckle edge at support piece edge.

The traditional process of producing this shoe-pad is the support piece of shaping earlier, then pours into the cushion mixture into on support piece's basis, nevertheless because the edge by plastic forming's support piece can remain deckle edge, the raw materials of cushion takes place the contact with deckle edge easily when the cushion shaping, has influenced the normal shaping of cushion, and then has influenced the appearance and the quality of shoe-pad.

By adopting the technical scheme of the application, the fixed groove and the positioning area form an area for forming the cushion, the cushion mixture is injected into the area, and the cushion is formed by compacting the forming block; after the supporting piece is placed into the positioning area, the burrs at the edge of the supporting piece extend out of the positioning area, and the burrs of the supporting piece are covered by the middle mold, so that the cushion mixture is effectively blocked, the condition that the burrs of the supporting piece are contacted with the cushion mixture during cushion forming is reduced, the generation of the burrs of the cushion is further reduced, the forming effect of the cushion is improved, and the burrs of the supporting piece can be removed after the combined insole is formed.

Optionally, well mould edge the edge in decide type groove is enclosed and is equipped with the design and encloses the limit, the lower mould is equipped with and encloses into the location limit in location district, well mould centers on the unedged groove of stepping down that covers support piece is seted up in the decide type groove, well mould is equipped with and is located the half sole cushion of the half sole portion in decide type groove, half sole cushion is used for supplying the half sole portion shaping of cushion.

Through adopting above-mentioned technical scheme, the design surrounding edge can improve the marginal strength in shaping groove to make the compaction of shaping piece inseparabler, the setting in groove of stepping down makes well mould can closely laminate with the lower mould.

Optionally, it includes the last mould front portion that sets gradually, the transition portion that caves in and last mould back portion to go up the mould, the shaping piece set up in go up mould front portion the transition portion that caves in and last mould back portion, the lower mould is including the lower mould front portion that sets gradually, evagination transition portion and lower mould back portion, the location limit set up in evagination transition portion and lower mould back portion, go up mould back portion with lower mould front portion rotates to be connected, the well mould cooperation go up the mould and the shape curved arc of lower mould extends.

By adopting the technical scheme, the upper die, the middle die and the lower die are compacted more tightly, and the stability of the forming quality of the combined insole is improved.

Optionally, the convex transition portion extends to an arch fitting portion matched with the support piece is formed in the positioning area, a heel positioning block used for limiting the movement of the support piece is arranged on a part of the lower die rear palm portion located in the positioning area, and a pad height portion abutted to the front palm cushion block is arranged on a part of the lower die rear palm portion located in the positioning area.

By adopting the technical scheme, the arch fitting part and the heel positioning block can both improve the stability of the support piece in the positioning area, so that the forming quality of the combined insole is further improved.

Optionally, a plurality of first exhaust seams are formed on the shaping surrounding edge, and a plurality of second exhaust seams are formed on the edge of the forming block.

Through adopting above-mentioned technical scheme, the gas outgoing that produces when first exhaust seam and second exhaust seam can supply the foaming reduces mould internal pressure, improves the foaming filling effect.

In a third aspect, the application provides a forming process of a combined insole, which adopts the following technical scheme:

a forming process of a combined insole comprises the following steps:

s1, opening an upper die and a middle die, and spraying a release agent on the upper die, the middle die and the lower die;

s2, placing the supporting piece into a positioning area, then placing the foam into a fixing groove of the supporting piece, rotating the middle die to enable the middle die to be attached to and locked with the lower die, covering burrs of the supporting piece by the middle die, and then hanging cloth on the upper die;

s3, injecting the soft cushion mixture into the fixed groove, rotating the upper die to enable the upper die and the middle die to be attached and locked, foaming and forming, then opening the upper die and the middle die, and taking out the combined insole;

and S4, trimming the combined insole to finish the manufacture of the combined insole.

Through adopting above-mentioned technical scheme, well mould covers support piece's deckle edge, through the shaping scope of well mould adjustment cushion to obtain the better shoe-pad of quality.

In summary, the present application includes at least one of the following beneficial technical effects:

1. triclosan is a phenolic compound and has good bactericidal effect, and the addition of triclosan into the soft pad can improve the mildew-proof and odor-resistant capability of the insole; the elastic force of the cushion can be enhanced by the polyether polyol A, the tensile property of the cushion can be enhanced by the polyether polyol B, the supporting capacity of the cushion can be enhanced by the polyether polyol C, water is used as a foaming agent, compared with the condition that organic liquid is used as the foaming agent, the water is more environment-friendly and nontoxic, and the problem of poor dimensional stability of the material when the water is used as the foaming agent is effectively solved by the matched use of the polyether polyol A, the polyether polyol B and the polyether polyol A, so that the cushion can still keep good elasticity and strength, and the wearing comfort of the insole is improved;

2. a middle die is arranged between an upper die and a lower die of the forming device, the fixed groove and the positioning area form an area for forming the cushion, the cushion mixture is injected into the area, and the cushion is formed by compacting the forming blocks; after the supporting piece is placed into the positioning area, the burrs at the edge of the supporting piece extend out of the positioning area, and the burrs of the supporting piece are covered by the middle mold, so that the cushion mixture is effectively blocked, the condition that the burrs of the supporting piece are contacted with the cushion mixture during cushion forming is reduced, the generation of the burrs of the cushion is further reduced, the forming effect of the cushion is improved, and the burrs of the supporting piece can be removed after the combined insole is formed.

Drawings

Fig. 1 is a sectional view of a combined insole according to example 1 of the present application.

Fig. 2 is a perspective view of a support member according to embodiment 1 of the present application.

Fig. 3 is a perspective view of the molding apparatus of example 1 of the present application when fully opened.

Fig. 4 is a perspective view of a middle mold in embodiment 1 of the present application.

Fig. 5 is a perspective view of the molding device of example 1 of the present application when it is half-open.

Description of the reference numerals: 1. a support member; 11. a base plate; 12. a back plate; 13. a side plate; 14. an arch portion; 15. a fixing groove; 16. a soft cushion; 17. soaking cotton; 2. a lower die; 21. a lower die front palm portion; 22. a convex transition portion; 23. a back palm part of the lower die; 24. a positioning area; 241. positioning the edge; 242. a raised portion; 243. a heel positioning block; 244. a label receiving slot; 245. an arch fitting part; 25. a middle die limiting column; 26. a lower die limiting hole; 3. a middle mold; 31. a relief portion; 32. a shaping groove; 33. a yielding groove; 34. a half sole cushion block; 35. shaping surrounding edges; 351. a first exhaust slot; 36. a middle die limiting hole; 37. a middle die limiting groove; 4. an upper die; 41. a front palm part of the upper die; 42. an invaginated transition portion; 43. a back palm part of the upper die; 44. forming a block; 45. a second exhaust slit; 46. an upper die limit column; 47. an upper die limiting needle; 5. a rotating shaft; 51. rotating the block; 6. a locking block; 61. a first vertical quick clamp; 62. and a second vertical quick clamp.

Detailed Description

The present application is described in further detail below with reference to figures 1-5.

The non-hydrolytic organic silicone oil surfactant is selected from polyurethane silicone oil with the model of L-580, from Shanghai Kaiyn chemical Co., ltd;

carbodiimide-uretonimine modified 4,4' -diphenylmethane diisocyanate is commercially available from basf, model No. MM-103C.

Preparation example

Preparation example 1

The preparation method of the polyether modified diphenylmethane diisocyanate comprises the following steps:

adding 2500g of 4,4' -diphenylmethane diisocyanate into a first reaction bottle, heating to 120 ℃ for melting, and then cooling to 45 ℃; adding 600g of polyether polyol D and 500g of polyether polyol E into a second reaction bottle, heating to 40 ℃, adding a mixture of the second reaction bottle into the first reaction bottle, heating to 65 ℃, stirring for 10min, stopping stirring, keeping the temperature for 20min to obtain a prepolymer, detecting that the NCO% of the prepolymer is 15%, mixing the prepolymer with 2000g of carbodiimide-uretonimine modified 4,4' -diphenylmethane diisocyanate, detecting that the NCO% of the prepolymer is 20%, cooling to 10 ℃, and discharging to obtain the polyether modified diphenylmethane diisocyanate.

Wherein, the hydroxyl value of the polyether polyol D is 32 mgKOH/g, the molecular weight is 5000, the functionality is 3, the hydroxyl value of the polyether polyol E is 27mgKOH/g, the molecular weight is 3000, and the functionality is 2.

Preparation example 2

firstly, adding 5000g of 4,4' -diphenylmethane diisocyanate into a first reaction bottle, heating to 130 ℃ for melting, and then cooling to 45 ℃; adding 1200g of polyether polyol D and 400g of polyether polyol E into a second reaction bottle, heating to 40 ℃, adding a mixture of the second reaction bottle into the first reaction bottle, heating to 65 ℃, stirring for 10min, stopping stirring, keeping the temperature for 30min to obtain a prepolymer, detecting that the NCO% of the prepolymer is 15%, mixing the prepolymer with 3000g of carbodiimide-uretonimine modified 4,4' -diphenylmethane diisocyanate, detecting that the NCO% of the prepolymer is 20%, cooling to 40 ℃, and discharging to obtain the polyether modified diphenylmethane diisocyanate.

Wherein, the hydroxyl value of the polyether glycol D is 34 mgKOH/g, the molecular weight is 6000, the functionality is 3, the hydroxyl value of the polyether glycol E is 27mgKOH/g, the molecular weight is 3000, and the functionality is 2.

Preparation example 3

adding 4000g of 4,4' -diphenylmethane diisocyanate into a first reaction bottle, heating to 120 ℃ for melting, and then cooling to 50 ℃; adding 800g of polyether polyol D and 800g of polyether polyol E into a second reaction bottle, heating to 50 ℃, adding a mixture of the second reaction bottle into the first reaction bottle, heating to 70 ℃, stirring for 20min, keeping the temperature for 20min after stopping stirring to obtain a prepolymer, detecting that the NCO% of the prepolymer is 20%, mixing the prepolymer with 4000g of carbodiimide-uretonimine modified 4,4' -diphenylmethane diisocyanate, detecting that the NCO% of the prepolymer is 25%, cooling to 20 ℃, and discharging to obtain the polyether modified diphenylmethane diisocyanate.

Wherein, the hydroxyl value of the polyether polyol D is 32 mgKOH/g, the molecular weight is 5000, the functionality is 3, the hydroxyl value of the polyether polyol E is 28mgKOH/g, the molecular weight is 4000, and the functionality is 2.

Examples

Example 1

This application embodiment 1 still discloses a modular shoe-pad, as shown in fig. 1 and fig. 2, including support piece 1, bubble cotton 17 and cushion 16, support piece 1 corresponds the well foot and the back palm portion that are located modular shoe-pad, support piece 1 includes bottom plate 11, back plate 12 and curb plate 13, bottom plate 11 is type rectangle structure, back plate 12 integrated into one piece is in one side minor face of bottom plate 11, curb plate 13 is provided with two and respectively integrated into one piece in the both sides long limit of bottom plate 11, and back plate 12 and curb plate 13 interconnect, bottom plate 11 sets up with the junction camber of one of them curb plate 13 and forms arch of foot portion 14.

The bottom plate 11 corresponds the heel part of combination formula shoe-pad and has seted up fixed slot 15, and fixed slot 15 is circular, and the cotton 17 card of bubble is gone into in fixed slot 15, realizes the preliminary fixed of cotton 17 of bubble.

The soft cushion 16 is formed in the supporting piece 1 in a foaming mode, the soft cushion 16 is fixed with the foam 17 in a compounding mode when being foamed, part of the soft cushion 16 extends out of the supporting piece 1, and the soft cushion 16 extends out of the front palm part of the supporting piece 1 and corresponds to the combined type insole.

The cushion is formed by cushion mixture, and the preparation method of the cushion mixture comprises the following steps:

adding 300g of polyether polyol A, 500g of polyether polyol B and 200g of polyether polyol C into a stirring barrel, mixing and stirring at a stirring speed of 10r/s, adding 100g of triethylene diamine, 100g of water, 2000g of ethylene glycol, 20g of non-hydrolytic organic silicone oil surfactant, 400g of dimethylethanolamine and 600g of triclosan while stirring, stirring for 1 minute at 250r/s after the raw materials are added, and then stirring for 3 minutes at a speed reduced to 100r/s to obtain the polyether polyol composite material.

Wherein, the hydroxyl value of the polyether polyol A is 25mgKOH/g, the molecular weight is 6000, and the functionality is 3; the hydroxyl value of the polyether polyol B is 25mgKOH/g, the molecular weight is 4000, and the functionality is 2; the polyether polyol C had a hydroxyl value of 28mgKOH/g, a molecular weight of 5000 and a functionality of 3.

2320g of diphenylmethane diisocyanate is added into the polyether polyol composite material, and the mixture is stirred for 20s at the speed of 450r/s, so that the cushion mixture is obtained.

Example 2

The preparation method of the cushion mixture comprises the following steps:

adding 700g of polyether polyol A, 700g of polyether polyol B and 600g of polyether polyol C into a stirring barrel, mixing and stirring at a stirring speed of 10r/s, adding 200g of triethylene diamine, 150g of water, 5000g of ethylene glycol, 60g of non-hydrolytic type organic silicone oil surfactant, 600g of dimethyl ethanolamine, 800g of triclosan and 100g of color paste while stirring, stirring for 3 minutes at 300r/s after the raw materials are added, and then stirring for 1 minute at a speed reduced to 150r/s to obtain the polyether polyol composite material.

Wherein, the hydroxyl value of the polyether polyol A is 30mgKOH/g, the molecular weight is 8000, and the functionality is 3; the hydroxyl value of the polyether polyol B is 28mgKOH/g, the molecular weight is 5000, and the functionality is 2; the polyether polyol C had a hydroxyl value of 30mgKOH/g, a molecular weight of 5000 and a functionality of 3.

4840g of diphenylmethane diisocyanate was added to the polyether polyol composition and stirred at 500r/s for 25s to obtain a cushion mixture.

Example 3

The preparation method of the cushion mixture comprises the following steps:

adding 500g of polyether polyol A, 300g of polyether polyol B and 300g of polyether polyol C into a stirring barrel, mixing and stirring at a stirring speed of 10r/s, adding 150g of triethylene diamine, 200g of water, 4000g of ethylene glycol, 40g of non-hydrolytic type organic silicone oil surfactant, 500g of dimethyl ethanolamine, 700g of triclosan and 1500g of color paste while stirring, stirring for 2 minutes at 300r/s after the raw materials are added, and then stirring for 2 minutes at a speed reduced to 150r/s to obtain the polyether polyol composite material.

Wherein, the hydroxyl value of the polyether polyol A is 30mgKOH/g, the molecular weight is 8000, and the functionality is 3; the hydroxyl value of the polyether polyol B is 28mgKOH/g, the molecular weight is 4000, and the functionality is 2; the polyether polyol C has a hydroxyl value of 28mgKOH/g, a molecular weight of 6000 and a functionality of 3.

4010g of diphenylmethane diisocyanate was added to the polyether polyol composition, and stirred at 500r/s for 25s to obtain a cushion mixture.

Example 4

This example differs from example 3 in that the same amount of polyether-modified diphenylmethane diisocyanate as prepared in preparation example 1 was used in place of the diphenylmethane diisocyanate.

Example 5

This example differs from example 3 in that the same amount of polyether-modified diphenylmethane diisocyanate as prepared in preparation 2 was used in place of the diphenylmethane diisocyanate.

Example 6

This example differs from example 3 in that the same amount of polyether-modified diphenylmethane diisocyanate as prepared in preparation 3 was used in place of the diphenylmethane diisocyanate.

Comparative example

Comparative example 1

This comparative example differs from example 3 in that the water is replaced by an equal amount of monofluorodichloroethane.

Comparative example 2

This comparative example differs from example 3 in that the polyether polyol B and polyether polyol C are replaced by equal amounts of polyether polyol a.

Comparative example 3

This comparative example differs from example 3 in that the polyether polyol a and polyether polyol C are replaced by equal amounts of polyether polyol B.

Comparative example 4

This comparative example differs from example 3 in that the polyether polyol a and polyether polyol B are replaced by equal amounts of polyether polyol C.

Comparative example 5

This comparative example differs from example 3 in that the polyether polyol B is replaced by an equal amount of polyether polyol A.

Comparative example 6

This comparative example differs from example 3 in that the polyether polyol C is replaced by an equal amount of polyether polyol A.

Comparative example 7

This comparative example differs from example 3 in that the polyether polyol A is replaced by an equal amount of polyether polyol B.

Performance testing

The cushions of the respective examples and comparative examples were tested for tensile strength at break according to GB/T528-2009, the test results being shown in table 1.

The cushions of the various examples and comparative examples were tested for tear strength according to ISO 20872-2018, with the test results shown in Table 1.

The hardness of the cushions of the respective examples and comparative examples were measured using a shore C durometer, and the results are shown in table 1.

TABLE 1

	Tensile Strength at Break (kg/cm) ² ）	Tear Strength (kg/cm)	Hardness (HC)
				Example 1	7.6	3.9	26
Example 2	7.8	4	26
				Example 3	7.4	4.2	26
Example 4	10.6	5	27
				Example 5	10.4	4.9	26
Example 6	11.0	5.2	27
				Comparative example 1	6.3	3.1	22
Comparative example 2	4.1	2.1	22
				Comparative example 3	5.1	2.5	22
Comparative example 4	3.8	1.7	25
				Comparative example 5	4.4	2	23
Comparative example 6	4.6	2.3	22
				Comparative example 7	4.7	2.3	23

As shown in table 1, monofluorodichloroethane is a commonly used organic foaming agent, and compared with comparative example 1, the tensile strength, tear strength and hardness of the cushion in example 3 are all higher, which indicates that when water is used as the foaming agent, the polyether polyol a, the polyether polyol B and the polyether polyol C are used in combination to keep the dimensional stability of the cushion, and effectively overcome the defect of poor fluidity of the mixture when water is used as the foaming agent, so that the tensile strength, tear strength and hardness of the cushion are improved, whereas when monofluorodichloroethane is used as the foaming agent, the polyether polyol a, the polyether polyol B and the polyether polyol C are not used in combination to improve the performance of the cushion, and water is more environmentally friendly and nontoxic as the foaming agent.

Comparative examples 2-7 were made using only one or two of polyether polyol a, polyether polyol B and polyether polyol C, and the tensile strength, tear strength and hardness of the cushion of example 3 were all higher than those of comparative examples 2-4, indicating that the improvement in cushion performance is through the synergistic effect of polyether polyol a, polyether polyol B and polyether polyol C.

Compared with the example 3, the examples 4 to 6 have higher tensile strength and tear strength, which shows that the compatibility of the polyether polyol composition in the mixture and the diphenylmethane diisocyanate can be improved by modifying the diphenylmethane diisocyanate with the polyether polyol, so that the cushion can be better molded, and the performance of the cushion can be improved.

Embodiment 1 of the application also discloses a forming device of the combined insole.

As shown in figure 3, the forming device of the combined insole comprises an upper die 4, a middle die 3 and a lower die 2 which are sequentially arranged from top to bottom, wherein the upper die 4, the middle die 3 and the lower die 2 are mutually rotatably connected at the same end, the die opening and die closing are realized through rotation, a supporting piece, foam and cushion mixture are added among the upper die 4, the middle die 3 and the lower die 2 during die opening, and the cushion mixture is foamed and formed after the die closing, so that the combined insole is manufactured.

Go up mould 4, well mould 3 and lower mould 2 respectively be fixed with two turning blocks 51 with the end, forming device still includes pivot 5, and pivot 5 wears to establish and rotates the turning block 51 of connecting in last mould 4, well mould 3 and lower mould 2 to the mutual rotation of mould 4, well mould 3 and lower mould 2 is connected in the realization.

The lower die 2 comprises a lower die front palm portion 21, a convex transition portion 22 and a lower die rear palm portion 23 which are integrally formed, a rotating block 51 of the lower die 2 is fixed on the lower die front palm portion 21, the lower die front palm portion 21 corresponds to a front palm portion of the insole, the lower die rear palm portion 23 corresponds to a rear palm portion of the insole, the thickness of the lower die front palm portion 21 is smaller than that of the lower die rear palm portion 23, the connecting position of the lower die front palm portion 21 and the lower die rear palm portion 23 is in curved arc transition in the thickness direction, the convex transition portion 22 is located between the lower die front palm portion 21 and the lower die rear palm portion 23 and corresponds to an arch portion of the insole, and the thickness of the convex transition portion 22 is larger than that of the lower die rear palm portion 23.

A positioning edge 241 is fixed on the lower die 2, the positioning edge 241 is specifically positioned on the convex transition part 22 and the lower die back palm part 23, and the positioning edge 241 is composed of three mutually connected side edges, so that a notch is reserved on one side of the positioning edge 241 and faces to the lower die front palm part 21; the part of the lower die back palm part 23 located in the positioning area 24 is integrally formed with a raised part 242, the raised part 242 is close to the gap of the positioning edge 241, and the raised part 242 enables the connection part of the lower die back palm part 23 located in the positioning area 24 and the lower die front palm part 21 to have a height difference.

Location limit 241 encloses into location district 24, location district 24 corresponds the well sufficient and the back portion of shoe-pad, location district 24 is used for supplying support piece to place, support piece's bottom plate and the lower mould back portion 23 butt, support piece's curb plate and location limit 241 butt, and support piece's curb plate and back plate edge deviate from one side parallel and level of lower mould 2 with location limit 241, support piece is moulded plastics by plastics and is formed, support piece's edge can remain deckle edge usually, support piece's deckle edge exceeds location limit 241, and support piece's deckle edge and the top side butt that location limit 241 deviates from lower mould 2.

Specifically, a heel positioning block 243 is fixed on the part of the lower die back palm portion 23 located in the positioning area 24, the heel positioning block 243 corresponds to the heel part of the insole, the heel positioning block 243 is matched with a fixing groove to form a circle, and after the support piece is placed in the positioning area 24, part of the fixing groove is used for the heel positioning block 243 to enter and be clamped, so that the movement of the support piece is limited, and the stability of the support piece is kept when the combined insole is formed; after the supporting piece is placed, the foam is clamped into the fixing groove, and therefore the supporting piece and the foam are placed.

One side of the positioning edge 241 is located on the convex transition portion 22, so that the convex transition portion 22 extends into the positioning region 24, and an arch attaching portion 245 is formed in the positioning region 24, and the arch attaching portion 245 is used for being abutted to an arch portion of the support, so as to further limit the support and improve the stability of the support.

In addition, the lower die back palm portion 23 is provided with a label accommodating groove 244 at the positioning area 24, and for the support member with the surface provided with the convex label, the label accommodating groove 244 can accommodate the label of the support member, so that the interference of the label on the support member is reduced.

As shown in fig. 3 and 4, one side of the middle mold 3 facing the lower mold 2 is fixed with a plurality of middle mold 3 locating parts, the middle mold 3 locating parts are distributed at the edge of the middle mold 3, the middle mold 3 locating parts are specifically cylindrical middle mold limiting columns 2525, the lower mold 2 is provided with a plurality of lower mold limiting holes 26, when the mold is closed, the middle mold 3 is rotated to enable the middle mold 3 to be abutted against the lower mold 2, the middle mold limiting columns 2525 are clamped into the corresponding lower mold limiting holes 26, so that the middle mold 3 and the lower mold 2 are compacted to play a limiting role, and the relative position of the middle mold 3 and the lower mold 2 is ensured to be accurate when the mold is closed.

The whole shape curved arc that cooperates lower mould 2 of well mould 3 extends, and well mould 3 middle part one side integrated into one piece have the portion of stepping down 31, and the portion of stepping down 31 is protruding toward the direction arc that deviates from lower mould 2, lets portion 31 and evagination transition portion 22 looks adaptation and butt when making well mould 3 and lower mould 2 butt to the surface of well mould 3 and lower mould 2 closely laminates in supplying.

Set type groove 32 has been seted up at the middle part of well mould 3, and set type groove 32 corresponds the shape setting of cushion, and when well mould 3 and lower mould 2 butt, location district 24 is located the below and the intercommunication of set type groove 32 to form the cushion shaping district that supplies cushion foaming shaping, after location district 24 is all located to support piece and bubble cotton, inject the cushion mixture into in past set type groove 32, and in order to supply going on of follow-up step and make the combination formula shoe-pad.

As shown in fig. 4 and fig. 5, the middle mold 3 has been seted up towards the one side of lower mold 2 and has been stepped down groove 33, step down groove 33 sets up around shaping groove 32 and communicates with shaping groove 32, when middle mold 3 and lower mold 2 butt, the inside wall of step down groove 33 and the lateral wall butt of location limit 241, leave the space for middle mold 3 and the laminating of lower mold 2, the inner wall that lower mold 2 was kept away from to step down groove 33 simultaneously keeps away from the top butt of lower mold 2 with location limit 241, the deckle edge butt of locating limit 241 is stretched out with support piece to the inner wall of step down groove 33 this moment, thereby utilize middle mold 3 to cover support piece's deckle edge, and effectively block cushion mixture, reduce support piece's the condition of contact with cushion mixture when cushion shaping, keep the orderliness of cushion edge, and then reduce the deckle edge's of cushion production, improve the shaping effect of cushion.

As shown in fig. 3 and 5, a half sole cushion block 34 is fixed to the middle mold 3, the half sole cushion block 34 is located at a half sole portion of the shaping groove 32 and fixed to a side wall of the shaping groove 32, when the middle mold 3 abuts against the lower mold 2, the half sole cushion block 34 abuts against the lower mold 2, and the half sole cushion block 34 abuts against a surface of the raised portion 242 away from the heel positioning block 243, so that after the supporting member is placed in the positioning area 24, a surface of the supporting member away from the raised portion 242 is flush with a surface of the half sole cushion block 34 away from the lower mold 2, thereby facilitating formation of a flat cushion; the surface of the half sole cushion block 34, which is far away from the lower die 2, is provided with a plurality of lines, and the lines can enable the soft cushion to form corresponding anti-skid lines; in addition, after the combined type insole is formed, before the combined type insole is taken out, the middle mold 3 is opened and the middle mold 3 is slightly rotated, and the half sole cushion blocks 34 can drive the combined type insole to slightly move, so that the combined type insole is loosened firstly, and the combined type insole is taken out conveniently.

The one side that well mould 3 deviates from lower mould 2 is fixed with design surrounding edge 35, and design surrounding edge 35 sets up around the edge of setting groove 32, and design surrounding edge 35 plays the effect that improves the structural strength at setting groove 32 edge to the thickness in the multiplicable cushion shaping district of design surrounding edge 35 reduces the excessive condition of cushion mixture.

As shown in fig. 3, the upper mold 4 includes an upper mold half portion 41, an inward-recessed transition portion 42 and an upper mold half portion 43 which are integrally formed, the rotating block 51 of the upper mold 4 is fixed on the upper mold half portion 43, the upper mold half portion 41 corresponds to the half portion of the insole, the upper mold half portion 43 corresponds to the half portion of the insole, wherein the thickness of the upper mold half portion 41 is larger than that of the upper mold half portion 43, the connection point of the upper mold half portion 41 and the upper mold half portion 43 is in curved transition in the thickness direction, the inward-recessed transition portion 42 is located between the upper mold half portion 41 and the upper mold half portion 43 and is correspondingly disposed above the relief portion 31, the thickness of the outward-protruding transition portion 22 is smaller than that of the upper mold half portion 43, and when the upper mold 4 abuts against the middle mold 3, the inward-recessed transition portion 42 abuts against the relief portion 31.

The upper die 4 is integrally formed with a forming block 44, the forming block 44 is specifically positioned on the front palm portion 41, the inward-concave transition portion 42 and the rear palm portion 43 of the upper die, the shape of the forming block 44 is matched with the shape enclosed by the shaping surrounding edge 35, when the upper die 4 is abutted to the middle die 3, the forming block 44 is pressed into the shaping surrounding edge 35, and the cushion mixture in the shaping groove 32 is compacted, so that the cushion is formed.

As shown in fig. 3 and 5, a plurality of first exhaust gaps 351 have been seted up to the one side that design surrounding edge 35 deviates from well mould 3, first exhaust gap 351 sets up around design surrounding edge 35 interval, multichannel second exhaust gap 45 has been seted up to the edge of shaping piece 44, second exhaust gap 45 sets up around the edge interval of shaping piece 44, can be between first exhaust gap 351 and the second exhaust gap 45 to align the setting or crisscross the setting, first exhaust gap 351 and second exhaust gap 45 all can play the gaseous effect that produces when the foaming of discharge cushion mixture, thereby reduce mould internal pressure, improve the foaming filling effect.

Go up the one side of mould 4 towards well mould 3 and be fixed with a plurality of mould 4 locating parts of going up, it specifically is cylindric last mould spacing post 46 and acicular last mould spacing needle 47 to go up the mould 4 locating part, it is located the diagonal angle of last mould 4 to go up mould spacing post 46, it distributes around shaping piece 44 to go up mould spacing needle 47, well mould 3 has seted up a plurality of well mould spacing holes 36 and a plurality of well mould spacing grooves 37, when closing the mould, will go up mould 4 and rotate the messenger and go up mould 4 and well mould 3 butt, go up the corresponding well mould spacing groove 37 of mould 46 card income of mould spacing post, it goes into in the corresponding well mould spacing hole 36 to go up mould spacing needle 47 card income, thereby play limiting displacement to the compaction of last mould 4 with well mould 3, it is accurate to guarantee to close the relative position of mould 4 with well mould 3 when mould.

In order to keep going up mould 4, well mould 3 and lower mould 2 press real-time compactness, well mould 3 and lower mould 2 all are provided with the locking piece, the locking piece specifically is perpendicular quick tongs, perpendicular quick tongs divide into first perpendicular quick tongs 61 and the perpendicular quick tongs 62 of second, the base of first perpendicular quick tongs 61 is fixed in the one end that pivot 5 was kept away from to lower mould 2, the base of the perpendicular quick tongs 62 of second is fixed in the one end that pivot 5 was kept away from to well mould 3, the one end that pivot 5 was kept away from to well mould 3 is fixed with locking block 6, the chuck of first perpendicular quick tongs 61 is supported tightly in locking block 6, thereby make well mould 3 and lower mould 2 press from tightly in the one side that mould 4 deviates from well mould 3, thereby make mould 4 and well mould 3 press from tightly, the shaping effect is improved.

The application embodiment 1 also discloses a forming process of the combined insole, which comprises the following steps:

s1, opening an upper die 4 and a middle die 3, and spraying a release agent on the upper die 4, the middle die 3 and a lower die 2, wherein the release agent is stearic acid;

s2, placing the support piece into the positioning area 24, clamping the heel positioning block 243 with a fixing groove of the support piece, clamping foam into the fixing groove of the support piece, rotating the middle die 3 to enable the middle die 3 to be attached to the lower die 2, covering burrs of the support piece through the abdicating groove 33 of the middle die 3, rotating and locking a handle of the first vertical quick clamp 61 to enable the middle die 3 to be locked with the lower die 2, and then hanging cloth on the upper die 4;

s3, injecting the cushion mixture into the fixed groove 32, rotating the upper die 4 to enable the upper die 4 to be attached to the middle die 3, rotating and locking a handle of the second vertical quick clamp 62 to enable the cushion mixture to be foamed and formed in the forming device, wherein the forming time is 8s, the forming temperature is 60 ℃, opening the upper die 4 and the middle die 3 after foaming and forming, and taking out the combined insole;

and S4, trimming the combined insole to complete the manufacture of the combined insole.

The above embodiments are preferred embodiments of the present application, and the protection scope of the present application is not limited by the above embodiments, so: all equivalent changes made according to the structure, shape and principle of the present application shall be covered by the protection scope of the present application.

Claims

1. A combined insole is characterized in that: the cushion is prepared from a cushion mixture containing a polyether polyol composite material and diphenylmethane diisocyanate, wherein the weight ratio of the polyether polyol composite material to the diphenylmethane diisocyanate is 100 (55-60), and the polyether polyol composite material is prepared from the following raw materials in parts by weight:

polyether polyol A3~7 parts;

polyether polyol B3~7 parts;

polyether polyol C2~6 parts;

0.2 to 0.6 part of foam homogenizing agent;

8978 parts of catalyst 8978 zxft;

water 1~2 parts;

20 to 50 parts of a curing agent;

5363 parts of a crosslinking agent 4~6;

5363 parts of triclosan 6~8;

the hydroxyl value of the polyether polyol A is 25 to 30mgKOH/g, the molecular weight is 6000 to 8000, and the functionality is 3; the polyether polyol B has a hydroxyl value of 25-28mgKOH/g, a molecular weight of 4000-5000 and a functionality of 2; the polyether polyol C has a hydroxyl value of 28 to 30mgKOH/g, a molecular weight of 5000 to 6000 and a functionality of 3;

the diphenylmethane diisocyanate is polyether modified diphenylmethane diisocyanate, and the preparation method of the polyether modified diphenylmethane diisocyanate comprises the following steps: melting 25-50 parts by weight of 4,4' -diphenylmethane diisocyanate at 120-130 ℃, cooling to 45-50 ℃, adding 6-12 parts by weight of polyether polyol D at 40-45 ℃ and 4~8 parts by weight of polyether polyol E at 40-45 ℃, heating to 65-70 ℃, stirring to 10-20 min, stopping stirring, keeping the temperature for 20-30min, detecting that the NCO% reaches 15-20%, adding 20-40 parts by weight of carbodiimide modified isocyanate, stirring for 20-30min, detecting that the NCO% reaches 20-25%, cooling to 10-40 ℃, and discharging;

2. A modular insole according to claim 1, wherein: the preparation method of the polyether polyol composite material comprises the following steps: mixing and stirring polyether polyol A, polyether polyol B and polyether polyol C, adding a catalyst, water, a hardening agent, a foam stabilizer, a cross-linking agent and triclosan while stirring, stirring for 1~3 minutes under 250-300r/s after the raw materials are added, then stirring for 1~3 minutes under the speed reduction of 100-150r/s to obtain a polyether polyol composite material; the preparation method of the cushion mixture comprises the following steps: and adding the diphenylmethane diisocyanate into the polyether polyol composite material, mixing and stirring, and stirring for 20 to 25s at 450 to 500r/s to obtain the cushion mixture.

3. A modular insole according to claim 1, wherein: support piece (1) include bottom plate (11), set up in back plate (12) of bottom plate (11) one side and set up in bottom plate (11) relative both sides and with curb plate (13) that back plate (12) are connected, bottom plate (11) back plate (12) with curb plate (13) enclose into the confession cushion (16) fashioned space, cushion (16) part is stretched out outside support piece (1), bottom plate (11) and one of them the junction arc setting of curb plate (13) forms arch of foot portion (14), the confession has been seted up in bottom plate (11) bubble fixed slot (15) that cotton (17) card was gone into.

4. A forming device of a combined insole is characterized in that: the combined insole is used for manufacturing the combined insole as claimed in any one of claims 1 to 3, and comprises an upper die (4), a middle die (3) and a lower die (2) which are rotatably connected at the same end and are sequentially arranged, wherein the upper die (4) is provided with a forming block (44), the lower die (2) is provided with a positioning area (24) for placing a support piece (1), burrs of the support piece (1) extend out of the positioning area (24), the middle die (3) is provided with a shaping groove (32) matched with the forming block (44), and one surface of the middle die (3) facing the lower die (2) is used for covering burrs at the edge of the support piece (1);

well mould (3) are followed the edge of decide type groove (32) is enclosed and is equipped with design surrounding edge (35), lower mould (2) are equipped with and enclose into location limit (241) of locating area (24), well mould (3) center on the unedged groove of stepping (33) that covers support piece (1) is seted up in decide type groove (32), well mould (3) are equipped with and are located half sole cushion (34) of the half sole portion of decide type groove (32), half sole cushion (34) are used for supplying the half sole shaping of cushion (16).

5. The apparatus for forming a combined insole as claimed in claim 4, wherein: go up mould (4) including the last mould that sets gradually palm portion (41), undercut transition portion (42) and go up mould back palm portion (43), become moulding piece (44) set up in go up mould front palm portion (41), undercut transition portion (42) and go up mould back palm portion (43), lower mould (2) including the lower mould that sets gradually palm portion (21), evagination transition portion (22) and lower mould back palm portion (23), location limit (241) set up in evagination transition portion (22) and lower mould back palm portion (23), go up mould front palm portion (41) with palm portion (21) rotate before the lower mould is connected, well mould (3) cooperation go up mould (4) and the shape camber extension of lower mould (2).

6. The apparatus for forming a combined insole as claimed in claim 5, wherein: the convex transition portion (22) extends to an arch attaching portion (245) matched with the support piece (1) is formed in the positioning area (24), a heel positioning block (243) used for limiting the movement of the support piece (1) is arranged on a part, located in the positioning area (24), of the lower die rear palm portion (23), and a heightening portion (242) abutted against the front palm cushion block (34) is arranged on a part, located in the positioning area (24), of the lower die rear palm portion (23).

7. The apparatus for forming a combined insole as claimed in claim 4, wherein: a plurality of first exhaust seams (351) are formed in the sizing surrounding edge (35), and a plurality of second exhaust seams (45) are formed in the edge of the forming block (44).

8. A molding process for making a modular shoe insole as claimed in any one of claims 1 to 3, wherein: a molding apparatus for a combined insole as claimed in claim 4, comprising the steps of:

s1, opening an upper die (4) and a middle die (3), and spraying a release agent on the upper die (4), the middle die (3) and a lower die (2);

s2, placing the support piece (1) into a positioning area (24), then placing the foam (17) into a fixing groove (15) of the support piece (1), rotating the middle die (3) to enable the middle die (3) to be attached to and locked with the lower die (2), covering burrs of the support piece (1) by the middle die (3), and then hanging cloth on the upper die (4);

s3, injecting the mixture of the soft pad (16) into a shaping groove (32), rotating the upper die (4) to enable the upper die (4) to be attached to and locked with the middle die (3), foaming and forming, then opening the upper die (4) and the middle die (3), and taking out the combined insole;

and S4, trimming the combined insole to complete the manufacturing of the combined insole.