KR20090095721A - Boots's manufacturing methods - Google Patents

Abstract

A method for manufacturing boots is provided to prevent deformation of the shape by performing one foaming within an injection mold through foaming particles for production of rubber boots. A method for manufacturing boots comprises the steps of: airtight mixing a natural rubber and a synthetic rubber in a mixer of 125°C; adding carbon, light calcium carbonate, and vulcanizing agent and heating and mixing them; adding zinc oxide, depilation wax, promoter, softening oil, zinc stearic acid, antiaging agent, and antioxidant and heating and mixing them; passing a mixture for rubber boots through a roller of 2 mm interval and dropping the mixture in a roll type; transferring the mixture to a machine for manufacturing rubber particles of 80°C ~ 105°C, and cutting it in diameter 2 mm; cooling the mixture and preparing foam particles; injecting the mixture in a foam injector of 75°C ~ 95°C and a mold of 170°C; passing a molding box of 85°C ~ 65°C through a foot shape mold(LAST) after vulcanization for 15 minutes and cooling it.

Description

Boots's manufacturing methods

The present invention relates to a method of manufacturing rain boots, and more specifically, natural rubber and synthetic rubber (SBR) are mixed, and carbon, hard calcium carbonate, and a vulcanizing agent are added to prepare rubber foam production foam particles for injection molding and hair loss. By completing this, it is possible to manufacture a light and soft boots.

Most of the boots used in the past are made of synthetic resin or EVA particles produced by an emulsifying company, and flowed into the foaming machine from the foam injection molding machine, followed by compression and foaming together with air, and then put into a foot-shaped mold (LAST) to prevent deformation. The finished product was manufactured by wearing the product by cooling it through a cooling system, but when the temperature increased in the summer, the boots contained therein were deformed and deformed during the evaporation of the air contained in the boots. Because it was not restored well and was hard, it was not comfortable to wear and had a heavy back.

The present invention has been invented a method of manufacturing rain boots that can solve the above problems, the process of mixing the natural rubber and synthetic rubber in a high-temperature mixer and mixing additives such as carbon, hard calcium carbonate, vulcanizing agent Get off at the open roller and cut into 2mm in diameter into the rubber particle maker, and at the same time, make foamed particles for rubber boots production by quenching and inject them in the foam injection molding machine at 75 ℃ ~ 95 ℃. After vulcanizing for a minute, it is possible to provide a comfortable, soft, eco-friendly rubber boots that do not deform and deform without impacting.

In the present invention, natural rubber and synthetic rubber are mixed, and carbon, hard calcium carbonate, and vulcanizing agent are added, heated, and mixed to prepare foamed particles for producing rubber boots, and foamed once in an injection mold. The soft, non-deformable touch can effectively produce boots that are comfortable to wear without waste of material or pollution of the environment.

Natural Rubber 42.81 Weight%

Synthetic rubber (Styrene butadiene rubber) 14.26 "

Carbon 28.53 "

Hard Calcium Carbonate (CaCo3) 11.4 "

Vulcanzing Agent 0.31 "

Zinc Oxide (zn0) 0.35 "

Blowing Agent 0.9 "

Hair Loss Wax (STE) 0.21 "

Accelerator (DCP) 0.03 "

Process oil 0.56 "

Zinc Stearic Acid (ENST) 0.19 "

Anti Aging Agent (SPP) 0.37 "

Fire Retardant (AT-76) 0.08 "

        Total 100 "

<1st process>

Seal mix for 42.81% by weight of natural rubber and 14.26% by weight of synthetic rubber in a mixer maintained at 125 ° C for 20 minutes.

<Second process>

28.53% by weight of carbon, 11.4% by weight of hard calcium carbonate, and 0.31% by weight of vulcanizing agent were added to the mixture which passed through the first step, and the mixture was heated and mixed for 20 minutes in a mixer at 125 ° C.

<Third process>

0.35 wt% zinc oxide, 0.9 wt% blowing agent, 0.21 wt% hair loss wax, 0.03 wt% accelerator, 0.56 wt% softening oil, 0.19 wt% zinc stararic acid, 0.37 wt% antioxidant, Add 0.08% by weight of each agent in the blending ratio and heat-mix for 20 minutes in a mixer at 125 ° C to produce a rubber boot mixture.

<4th process>

The mixture for the production of rubber boots after the third process is taken out and passed through the rollers at intervals of 2 mm to lower the roll into a form.

<5th process>

The rolled through the fourth process is put into a rubber particle maker maintained at 80 ℃ ~ 105 ℃ cut to a size of 2 mm in diameter and quenched at the same time to produce a foamed foam for producing rubber boots can be injected immediately.

<6th process>

The foamed particles for rubber boots production having a diameter of 2 mm passed through the fifth process are injected from a foam injection molding machine maintained at 75 ° C. to 95 ° C. and a mold maintained at 170 ° C., and dehydrated after 7 minutes to 8 minutes.

<7th process>

After passing through the sixth step of the hair loss mold (LAST) through a molding box of 85 ℃ ~ 65 ℃ for 15 minutes to cool to manufacture the finished product.

Thus, the present invention is a mixture of 42.81% by weight of natural rubber and 14.26% by weight of synthetic rubber in a mixer maintained at 125 ℃ for 20 minutes, 28.53% by weight carbon, 11.4% by weight calcium carbonate, 0.31% by weight vulcanizing agent After the second mixture, the mixture was heated and mixed, followed by 0.35% by weight of zinc oxide, 0.9% by weight of blowing agent, 0.21% by weight of hair loss wax, 0.03% by weight of accelerator, 0.56% by weight of softened oil, 0.19% by weight of zinc stearic acid, and aging. 0.37% by weight of inhibitor and 0.08% by weight of flame retardant were added to the mixer at the mixing ratio, and then the mixture for production of the rubber boots produced by heat mixing was taken out, the rollers were adjusted to 2 mm, and the rollers were passed through the rollers having a gap of 2 mm to form a roll. The rubber boots are transported to the rubber particle maker, which is maintained at 80 ℃ ~ 105 ℃, cut into 2mm diameter and quenched at the same time to produce rubber boots that can be injected immediately. After forming foam particles for injection molding and injection molding in the mold maintained at 75 ℃ ~ 95 ℃ and the mold maintained at 170 ℃, vulcanized for 7 minutes to 8 minutes, and the deformed hair mold (LAST) of 85 ℃ ~ 65 ℃ After passing through the box for 15 minutes, the product is cooled and manufactured.

Claims (1)

Add 42.81% by weight of natural rubber and 14.26% by weight of synthetic rubber to a mixer maintained at 125 ° C in a mixing ratio for 20 minutes to seal-mix and heat by adding 28.53% by weight of carbon, 11.4% by weight of hard calcium carbonate and 0.31% by weight of vulcanizing agent. After mixing, the remaining additives were zinc oxide 0.35% by weight, blowing agent 0.9% by weight, hair loss wax 0.21% by weight, accelerator 0.03% by weight, softening oil 0.56% by weight, zinc stararic acid 0.19% by weight, antioxidant 0.37% by weight, fire retardant Take out the mixture for the production of rubber boots which are continuously heated and mix by adding 0.08% by weight of each, and pass through the roller of 2 mm intervals to roll down the form and transfer it to the rubber particle maker maintained at 80 ℃ ~ 105 ℃. Manufactured foam particles for the production of rubber boots that can be immediately injected by quenching and cutting at the size of mm, and 170 ℃ and foam injection molding machines are maintained at 75 ℃ ~ 95 ℃. After injection in the mold after vulcanization 7-8 minutes process for producing a rubber boots, characterized in that to the foot-shaped mold hair loss (LAST) cooling after passing through the forming box of 85 ℃ ~ 65 ℃ 15 bungan manufacture the finished product