KR101912909B1 - Iron Panel Bending Device - Google Patents

Abstract

The present invention relates to an iron panel bending device capable of effectively bending an iron panel. The iron panel bending device includes: a housing part forming a body of the iron panel bending device; a bending and pressing part connected and mounted to an upper portion of a front side of the housing part to press the iron panel by operating vertically to bend the iron panel into a desired shape; a bending support part connected and mounted at a lower portion of the front side of the housing part to face a lower portion of the bending and pressing part, wherein the bending support part has a holder on which the iron panel is put to support a bent portion of the iron panel when the bending and pressing part falls down; a bending control unit mounted at one side of the housing part, receiving and setting at least one set value among vertical operation height, operation force, operation speed and a vertically operating direction of the bending and pressing part from a user, and operating the bending and pressing part according to a set value when an operation request signal is received; and a control pedal part which is connected to the outside of the housing art by a cable or wirelessly and generates an operation request signal in response to an operation request when receiving the operation request of the bending and pressing part from a user and transfers the operation request signal to the bending control unit.

Description

[0001] The present invention relates to an iron panel bending device,

BACKGROUND OF THE INVENTION 1. Field of the Invention [0001] The present invention relates to an iron plate bending apparatus, and more particularly, to an iron plate bending apparatus implemented to efficiently bend an iron plate.

Generally, in order to bend the steel plate into a desired shape, a bending mold setting device should be mounted on the sinker portion of the bending machine so that the bending mold can be detachably attached.

A conventional bending mold setting device includes a main block having an upper surface inclined to one side and a plurality of fastening holes formed on a front surface thereof, A tapered key is coupled using a bolt as a joining slot of a flat block, and a clamper is fastened with a bolt to clamp the bending mold to the lower side of the main block to constitute a bending mold setting device.

After the bending mold setting device is tightly attached to the lower end of the sinker of the bending machine, the upper end of the flat block coupled to the main block is clamped to the sinker by using a clamper, and then the bending machine is operated. Bend the steel plate while moving the bending die mounted by the clamper up and down.

This is because it is necessary to fasten the clamper to the main block by using bolts so as to attach the bending mold to the lower end of the main block coupled to the sinker portion of the bending machine, If the bolt is not tightened, the bending state of the bending plate is deteriorated due to the bending die being detached during the operation, or it is inconvenient to newly set the bending die with the clamper.

Korean Public Utility Model No. 1999-013438 Korean Patent No. 10-1844195

According to an aspect of the present invention, there is provided an iron plate bending apparatus that can be remotely performed by bending an iron plate even when the user can not use both hands by moving the position of the iron plate.

The technical problem of the present invention is not limited to the technical problems mentioned above, and other technical problems which are not mentioned can be understood by those skilled in the art from the following description.

According to an embodiment of the present invention, there is provided an iron plate bending apparatus comprising: a housing part forming a body of an iron plate bending device; A bending and pressing part connected to an upper part of a front surface of the housing part and driven in a vertical direction so as to bend an iron plate in a required shape so as to press the iron plate; A bending support part which is connected to the lower part of the front surface of the housing part so as to be opposite to the bending part and forms a pedestal for supporting the bending part of the bending steel plate; A setting value of at least one of a vertical driving height, a driving force, a driving speed, and a vertical driving direction of the bending pressing portion is set as an input from a user, and when a driving request signal is received, A bending control unit for driving the bending and pressing unit; And a control pedal part connected to the outside of the housing part by wire or wireless connection, receiving a driving request of the bending and pressing part from a user, generating a driving request signal corresponding thereto, and transmitting the driving request signal to the bending control part.

In one embodiment, the control pedal portion is made of high density polyethylene resin (HDPE) 110 to 130 (hereinafter, referred to as " HDPE ") with respect to 100 parts by weight of polypropylene resin so as to radiate far infrared rays that improve mechanical properties and twisting phenomenon, 1 to 10 parts by weight of talc, 1 to 10 parts by weight of germanium powder, 15 to 25 parts by weight of glass fiber reinforced plastic, 2 to 7 parts by weight of glue, 5 to 10 parts by weight of cork powder, sucrose (C12H22O11) 1 to 4 parts by weight of powder, 2 to 5 parts by weight of betaine, and 3 to 8 parts by weight of boehmite (AlO (OH)), and is made of a plastic composition having a specific gravity of 1.02 to 1.10, A pedal body formed in a pedal shape; A driving request unit installed inside the pedal body for generating a driving request signal after sensing the user pressing the pedal body and transmitting the driving request signal to the bending control unit through wired or wireless communication; 1 to 30 parts by weight of polyvinyl alcohol (PVA), 10 to 30 parts by weight of water, 5 to 30 parts by weight of calcium carbonate, and 5 to 30 parts by weight of a polyvinyl alcohol (PVA), based on 30 to 90 parts by weight of an ethylene vinyl acetate (EVA) 1 to 20 parts by weight of a thixotropic agent, 3 to 7 parts by weight of sodium silicate, 1 to 5 parts by weight of molybdenum disulfide (MoS2), 5 to 10 parts by weight of aluminum hydroxide, (TDI), hydrogenated TDI, trimethyl propane (TDI), tripehnylmethane-triisocyanate (TDI), and mixtures thereof. Isocyanate comprising at least one of TTI, diphenylmethane-4,4-diisocianate (MDI), hydrogenated MDI, and hexamethylene-diisocyanate (HDI) Made of a compound And it may include a pedal protective sheet attached to the upper portion of the pedal body by means of an adhesive composition comprising a curing agent that is an amount of 1-20 parts by weight per 100 parts by weight of the subject to prevent the wear of the pedal body.

According to one aspect of the present invention, even if two hands can not be used by moving the position of the iron plate, the bending of the iron plate can be performed remotely.

1 is a view for explaining an iron plate bending apparatus according to an embodiment of the present invention.
Fig. 2 is a view for explaining the control pedal portion shown in Fig. 1. Fig.
Figs. 3 to 6 are views for explaining the bending support shown in Fig. 1. Fig.

The following detailed description of the invention refers to the accompanying drawings, which illustrate, by way of illustration, specific embodiments in which the invention may be practiced. These embodiments are described in sufficient detail to enable those skilled in the art to practice the invention. It should be understood that the various embodiments of the present invention are different, but need not be mutually exclusive. For example, certain features, structures, and characteristics described herein may be implemented in other embodiments without departing from the spirit and scope of the invention in connection with an embodiment. It is also to be understood that the position or arrangement of the individual components within each disclosed embodiment may be varied without departing from the spirit and scope of the invention. The following detailed description is, therefore, not to be taken in a limiting sense, and the scope of the present invention is to be limited only by the appended claims, along with the full scope of equivalents to which such claims are entitled, if properly explained. In the drawings, like reference numerals refer to the same or similar functions throughout the several views.

Hereinafter, preferred embodiments of the present invention will be described in more detail with reference to the drawings.

1 is a view for explaining an iron plate bending apparatus according to an embodiment of the present invention.

Referring to FIG. 1, the iron plate bending apparatus 10 includes a housing unit 100, a bending pressing unit 200, a bending support unit 300, a bending control unit 400, and a control pedal unit 500.

The housing part 100 has a bending part 200 connected to the upper part of the front surface thereof and a bending part 400 installed at one side thereof to form the body of the bending device.

The bending pressurizing portion 200 is connected to an upper portion of the front surface of the housing portion 100 and is driven in an upward and downward direction so as to bend an iron plate in a desired shape to press the iron plate placed on the bending support portion 300 .

In one embodiment, the portion of the bending pressurizing portion 200 that presses the iron plate may be formed into a cylindrical shape as shown in Fig.

However, in the case of the bending and pressing part 200 according to the present invention, the pressing part of the iron plate is formed in a round shape, The iron plate placed on the support portion 300 can be more efficiently bent.

The bending support part 300 is connected to the lower side of the bending part 200 at the lower part of the front surface of the housing part 100 and is connected to the bending part 200. The bending part supports the bent part of the bending part 200, So as to form a pedestal for placing the steel plate.

In one embodiment, the bent support portion 300 has a V-shaped bent groove formed in the longitudinal direction at the upper portion of a pedestal for placing the steel plate, so that, when the bending pressing portion 200 is pressed, So that it can be bent.

The bending control unit 400 is installed at one side of the housing unit 100 and sets at least one of a vertical driving height, a driving force, a driving speed, and a vertical driving direction of the bending and pressing unit 200 from a user When the drive request signal is received from the control pedal unit 500, the bending and pressing unit 200 is driven according to the set value.

The control pedal unit 500 is connected to the outside of the housing unit 100 by wire or wirelessly. The control pedal unit 500 receives a driving request of the bending and pressing unit 200 from a user, generates a driving request signal corresponding thereto, 400).

For example, the user can request to drive by stepping on the upper part of the control pedal portion 500. [

The iron plate bending device 10 having the above-described structure is driven in response to the user pressing the control pedal part 500 using his / her foot, and the user performs operations such as moving the position of the iron plate The bending of the steel plate can be performed even when the hand is not available.

Fig. 2 is a view for explaining the control pedal portion shown in Fig. 1. Fig.

Referring to FIG. 2, the control pedal portion 500 includes a pedal body 510, a drive request portion 520, and a pedal protection sheet 530.

The pedal body 510 is composed of 110 to 130 parts by weight of a high-density polyethylene resin (HDPE) based on 100 parts by weight of a polypropylene resin so as to radiate far-infrared rays that improve mechanical properties and twisting phenomena and promote metabolism of the body, (C12H22O11) powder, 1 to 10 parts by weight of talc, 1 to 10 parts by weight of germanium powder, 15 to 25 parts by weight of glass fiber reinforced plastic, 2 to 7 parts by weight of glue, 5 to 10 parts by weight of cork powder, 4 to 8 parts by weight of boehmite (Boehmite, AlO (OH)) and having a specific gravity of 1.02 to 1.10, in the form of a pedal that the user can step on And a pedal protecting sheet 530 is attached to the upper portion by the adhesive composition described later so as to prevent the wear of the upper portion.

The plastic composition for manufacturing the pedal body 510 of the present invention may include a polypropylene resin, a high density polyethylene resin (HDPE), talc, and a germanium powder.

When the above-mentioned plastic composition is used, it is possible to improve the mechanical properties such as heat resistance and durability, to improve the twisting phenomenon, to promote the metabolism by radiating the far-infrared rays and to improve the storage stability of the food stored in the plastic container It is possible to produce an effect of producing a plastic sheet (product) which can be improved.

Polypropylene resin is a thermoplastic resin which is obtained by polymerization of propylene and is known as an environmentally friendly material which is inexpensive in performance and is free from the risk of contact with the contents of foods or cosmetics. It is excellent in properties and thermal properties.

The polypropylene may be at least one selected from a propylene homopolymer, a random copolymer, and a block copolymer. In order to improve the mechanical properties, a homopolymer and a random copolymer are mixed at a weight ratio of 3: 2 .

High-density polyethylene (HDPE) resin is a synthetic resin produced by polymerizing ethylene, and has excellent flowability, rigidity, impact resistance, electrical insulation, moldability, and cold resistance.

The high-density polyethylene resin may have the effect of improving the formability by mixing with the polypropylene resin to strengthen the tensile force in the production of the plastic sheet or the product, and a variety of known products can be used.

Talc improves mechanical properties such as strength and heat resistance of a plastic composition, and it is preferable to use a talc powder having a particle size of 150 to 200 mesh for mixing with a polypropylene resin or the like.

The talc may be used in admixture with other filler components, and may preferably be mixed with the dolomite powder at a weight ratio of 1: 1 to contribute to improvement of the durability of the plastic composition.

Germanium is a silver-white quasi-metal, which has the effect of promoting metabolism by radiating a large amount of far-infrared rays and anions which are beneficial to the human body.

In addition, germanium, due to its semiconducting properties, causes germanium ions (outer electrons) to enter the body when it comes into contact with the skin, thereby enhancing the vitality. When it enters the body, it is released out of the body in 20 to 30 hours together with various harmful substances. There is no side effect at all.

Particularly, when the particles of inorganic germanium come into contact with human skin, semiconductor properties are introduced into the skin tissue by the osmotic action of the outer electron. It has been found that germanium, which penetrates into capillaries in subcutaneous tissue, moves electrons in blood vessels through blood vessels, cleanses blood, normalizes blood, and discharges excess electrons to relieve pain.

The germanium can be used in the form of a powder. It is preferable that the germanium ore is finely cut to 3 cm or less and then the cut germanium ore is pulverized to a particle size of 80 to 100 mesh.

In one embodiment, the plastic composition preferably comprises 110 to 130 parts by weight of high-density polyethylene resin, 170 to 190 parts by weight of talc, and 1 to 10 parts by weight of germanium powder, based on 100 parts by weight of the polypropylene resin.

When the pedal body 510 is manufactured by using the plastic composition, it is important to control the specific gravity of the plastic composition in order to eliminate a twisting phenomenon. The specific gravity is preferably 1.02 to 1.10, more preferably 1.03 to 1.05 , That is, when the amount of the high-density polyethylene resin is less than 110 parts by weight or the amount of the talc is less than 170 parts by weight based on 100 parts by weight of the polypropylene resin, mechanical properties such as durability are limited, If the polyethylene resin exceeds 130 parts by weight or the talc exceeds 190 parts by weight, the specific gravity of the plastic composition may increase and the moldability may be deteriorated.

If the amount of the germanium powder is less than 1 part by weight with respect to 100 parts by weight of the polypropylene resin, far infrared ray emission effect due to germanium is difficult to manifest. If the amount is more than 10 parts by weight, It can become bad.

In one embodiment, the plastic composition described above may further comprise glass fiber reinforced plastic to enhance impact resistance.

Fiberglass Reinforced Plastic (FRP) is a material in which glass-based minerals are used as main materials and aromatic nylon fibers and thermosetting resins are combined with glass-based minerals.

The glass-based mineral may be at least one selected from the group consisting of silica sand, limestone, feldspar, and soda ash, but is not limited thereto.

As the thermosetting resin, various known thermosetting resins can be used, and preferably, polyester or epoxy resin can be used.

Glass fiber reinforced plastics can be produced by mixing materials such as glass-based minerals and putting them into a melting furnace. Each air layer sealed between glass fibers functions as a heat insulating layer, so that it is excellent in incombustibility, sound absorption property and workability.

Also, it is stronger than iron, lighter than aluminum, and does not rust. It has excellent nonflammability and is not deformed by heat and is easy to process.

At this time, it is preferable to add glue to improve the mixing property with glass fiber reinforced plastic (pellet type) and PVC.

Glue is a substance that solidifies the liquid of an animal such as an animal's skin, intestines, bones, etc., and solves problems such as the release of environmental hormones while improving the binding force of each component.

The glass fiber reinforced plastic and the glue are preferably contained in an amount of 15 to 25 parts by weight and 2 to 7 parts by weight, respectively, based on 100 parts by weight of the polypropylene resin. If the glass fiber reinforced plastic and the glue are less than the above range, If it exceeds the range, the product may be cracked during production and is uneconomical.

In one embodiment, a cork powder may be further included to improve the elasticity of the pedal body 510 using the plastic composition.

The cork powder can be prepared by removing the shell of oak oak, and then crushing it. For the cork powder to be mixed with polypropylene resin or the like, it is preferable to use fine pulverized particles which are sieved through a mesh of 400 mesh or more.

The cork powder is preferably contained in an amount of 5 to 10 parts by weight based on 100 parts by weight of the polypropylene resin. When the cork powder is less than 5 parts by weight, the degree of improvement of the elasticity is insignificant. When the cork powder is more than 10 parts by weight, The voids formed in the inside during manufacturing may become large and the durability may be weakened.

In order to improve the mixing property of the cork powder and the other ingredients, sucrose (C ₁₂ H ₂₂ O ₁₁ ) powder may be further added.

The sucrose not only smoothes the pores formed between the cork powders but also tends to be viscous in the process of mixing with PVC and the like, which can catch the molecules causing the problem of bad odor, which can contribute to solving the problem of bad odor.

The sucrose is preferably a powder that has been passed through a 500-mesh net, and is preferably contained in an amount of 1 to 4 parts by weight based on 100 parts by weight of the polypropylene resin. When sucrose is less than 1 part by weight, If the amount is more than 4 parts by weight, it is not only economical but also may weaken the mechanical properties of the product.

In one embodiment, the plastic composition may further comprise a white powder. Potassium alum (potassium aluminum sulfate, AlK (SO ₄ ) ₂ .12H ₂ O) can be used as the alum, and can be obtained from natural alum.

Concretely, it can be produced by dissolving alunculus in water and filtering it, then breaking it, and cooling it if irregularly shaped crystals are formed. The alumina is preferably contained in an amount of 2 to 5 parts by weight based on 100 parts by weight of the polypropylene resin. When the alumina content is less than 2 parts by weight, the alumina effect is insignificant.

In one embodiment, the plastic composition according to the present invention may further comprise boehmite (Boehmite, AlO (OH)) to improve antimicrobial properties.

Boehmite can be any of γ-boehmite, a-boehmite, and pseudo-boehmite. Among them, boehmite is excellent in crystallinity, excellent in thermal stability and chemical stability, structurally neutral, It is preferable to use an excellent? -Behoeite.

The γ-boehmite can be produced by supercritical synthesis of only water (pure water) and aluminum (Al). It is preferable that boehmite is included in 3 to 8 parts by weight with respect to 100 parts by weight of the polypropylene resin. If the content of boehmite is less than 3 parts by weight, it is difficult to exhibit the antimicrobial effect to be achieved. There is a possibility that the mixing property of the resin is deteriorated.

Hereinafter, the composition and effect of the plastic composition according to the present invention will be described in more detail with reference to specific examples and comparative examples. However, this embodiment is intended to explain the present invention more specifically, and the scope of the present invention is not limited to these embodiments.

[Example 1]

180 kg of polypropylene resin, 200 kg of high density polyethylene resin (HDPE), 310 kg of talc and 15 kg of germanium powder were mixed to prepare a plastic composition.

[Example 2]

And 36 kg of glass fiber reinforced plastic and 9 kg of glue were further mixed to prepare a plastic composition.

[Example 3]

9 kg of cork powder, 5 kg of sucrose powder, 5 kg of white powder, and 9 kg of gamma-boehmite were further mixed to prepare a plastic composition.

[Comparative Example 1]

Was prepared in the same manner as in Example 1, except for talc.

[Experimental Example 1: Evaluation of impact resistance]

A specimen (20 cm * 30 cm, thickness 20 mm) was prepared using the plastic compositions of Examples 1 to 3 and Comparative Example 1, and a weight of 3 kg was dropped at a height of 2 m. The degree of breakage of each specimen was measured, The results are shown in Table 1 below.

As can be seen from the above Table 1, it was found that the examples including the talc were superior in impact resistance as compared with Comparative Example 1 which did not include talc. In particular, in Examples 2 and 3 containing glass fiber reinforced plastics, the best results were obtained.

[Experimental Example 2: Evaluation of heat resistance]

The specimen of Experimental Example 1 was heated for 3 hours in a hot air circulating heating furnace maintained at 80 ° C, and yellowing degree was visually observed. The results are shown in Table 2 below.

As can be seen from Table 2, in Examples 1 to 3, yellowing portions were hardly observed unlike Comparative Example 1. As a result, it was found that the heat resistance of the example was much better than that of the comparative example 1.

[Experimental Example 3: Evaluation of antimicrobial activity]

Example 1, Example 3 and Comparative Example 1 were subjected to a test for antibacterial activity (JIS Z 2801). Aspergillus niger ATCC 9642 (fungus) was used as the test strain and the antibacterial activity (antibacterial activity value) was evaluated and shown in Table 3 below.

The antimicrobial activity value refers to a value obtained by evaluating the degree of antimicrobial activity by comparing the number of strains cultured for a certain period of time. When the value is 1 or more, 90% or more of the strains are present, 2 or more are 99% , More than 99.99% of the strain is over 4, and more than 5 is more than 99.999% of the strain is killed.

As can be seen from the above Table 3, it was predicted that the antibacterial activity of Example 3 including gamma-boehmite was much better than those of other cases.

The drive request unit 520 is installed in an internal space of the pedal body 510. When the user presses the pedal body 510, the driver request unit 520 generates a drive request signal and transmits the drive request signal to the bending control unit 400 to the pedal main body 510. The pedal main body 510 includes a pedal body 510,

The pedal protection sheet 530 is made of the same plastic composition as the pedal body 510 and is formed by blending 1 to 30 parts by weight of polyvinyl alcohol (PVA), 10 to 30 parts by weight of water, 10 to 30 parts by weight of ethylene vinyl acetate (EVA) 1 to 20 parts by weight of a thixotropic agent, 3 to 7 parts by weight of sodium silicate, 1 to 5 parts by weight of molybdenum disulfide (MoS2), 5 to 30 parts by weight of calcium carbonate, 0.1 to 1 part by weight of a surfactant, 5 to 10 parts by weight of aluminum hydroxide and 10 to 30 parts by weight of water as a solvent and at least one solvent selected from the group consisting of toluene-diisocyanate (TDI), hydrogenated TDI, trimethyl propane-TDI, Diisocyanate (MDI), hydrogenated MDI, and hexamethylene-diisocyanate (HDI), as well as polyisocyanates, such as methane-triisocyanate (TTI), diphenylmethane-4,4- Lt; RTI ID = 0.0 > isocyanate < / RTI & And is attached to an upper portion of the pedal body 510 to prevent wear of the pedal body 510 by an adhesive composition comprising a hardener included in 1 to 20 parts by weight with respect to 100 parts by weight of the main body.

In one embodiment, the adhesive composition used for attaching the pedal protective sheet 530 is an adhesive composition comprising a topical and a curing agent, the subject of which comprises 30 to 90 parts by weight of an ethylene vinyl acetate (EVA) resin, polyvinyl alcohol 1 to 30 parts by weight of water, 10 to 30 parts by weight of water, 5 to 30 parts by weight of calcium carbonate, 0.1 to 1 part by weight of a surfactant and 1 to 20 parts by weight of a thixotropic agent, can do.

The adhesive composition is a water-soluble two-component adhesive composition composed of a subject and a curing agent, which can be applied and cured to produce an adhesive sheet or an adhesive. The adhesive composition is excellent in physical properties such as adhesiveness and heat resistance Wood board such as plywood, inorganic board such as magnesium board, PVC, and the like.

The subject basically comprises an ethylene vinyl acetate (EVA) resin, polyvinyl alcohol (PVA), water, calcium carbonate, a surfactant and a thixotropic agent, the ethylene vinyl acetate resin being the main component of the subject, The strength of the adhesive sheet or adhesive can be kept constant.

Conventionally, an epoxy resin is used as a main component of an adhesive sheet or an adhesive. However, in the case of an adhesive sheet or an adhesive using an epoxy resin, volatile organic compounds such as benzene toluene are released to adversely affect the environment and human body.

However, the adhesive composition of the present invention can solve problems such as environmental problems by excluding an epoxy resin.

Polyvinyl alcohol (PVA) has a role of improving the heat resistance, water resistance and adhesiveness of an adhesive sheet or adhesive to be produced.

The polyvinyl alcohol is preferably contained in an amount of 1 to 30 parts by weight based on 30 to 90 parts by weight of the ethylene vinyl acetate resin. When the amount of the polyvinyl alcohol is less than 1 part by weight, it is difficult to improve the heat resistance, , The relative content of ethylene vinyl acetate may be reduced and the cohesive force of the adhesive sheet or adhesive may be weakened.

Further, in the present invention, antimony oxide and zirconium oxide may be used together with polyvinyl alcohol in order to supplement the functionality of polyvinyl alcohol when used in an ondol floor or the like.

Antimony oxide and zirconium oxide are materials capable of enhancing the heat resistance of the adhesive sheet or adhesive to be produced and are preferably contained in an amount of 5 to 10 parts by weight based on 30 to 90 parts by weight of the ethylene vinyl acetate resin. The effect of enhancing is insignificant, and when it exceeds the above range, it is uneconomical.

Water can be used as a solvent for the subject.

INDUSTRIAL APPLICABILITY The present invention has the effect of solving the environmental pollution problem without using a volatile organic solvent unlike the conventional adhesive sheet or adhesive.

Water is preferably contained in an amount of 10 to 30 parts by weight based on 30 to 90 parts by weight of the ethylene vinyl acetate resin. When the amount of water is less than 10 parts by weight, ethylene vinyl acetate resin and the like can not be effectively dissolved. The strength of the adhesive sheet or the adhesive may be lowered.

Calcium carbonate modulates the viscosity of the adhesive composition and reduces shrinkage upon curing.

The calcium carbonate is preferably contained in an amount of 5 to 30 parts by weight based on 30 to 90 parts by weight of the ethylene vinyl acetate (EVA) resin. When the amount of calcium carbonate is less than 5 parts by weight, sufficient shrinkage does not occur during curing, If the amount is more than 30 parts by weight, the viscosity may become too tight and the productivity may be deteriorated.

In addition, the present invention may use various materials such as wormwood and clay to replace calcium carbonate. For example, dolomite and / or talc may be used.

In order to improve the mechanical properties, dolomite and talc are preferably mixed at a weight ratio of 1: 1, and the powder preferably has a particle size of 150 to 200 mesh, The use of the finely pulverized powder to improve the mixing property with other components such as ethylene vinyl acetate resin.

The surfactant is used in order to reduce the surface tension when mixing the adhesive composition and to improve the coating property.

The surfactant is preferably contained in an amount of 0.1 to 1 part by weight based on 30 to 90 parts by weight of the ethylene vinyl acetate resin.

As the surfactant, known nonionic surfactants and anionic surfactants can be used, but in order to effectively reduce the surface tension, it is preferable to use a gemini type sulfonic acid type surfactant containing an alkyl chain having 8 to 14 carbon atoms .

The thixotropic agent prevents the adhesive composition from flowing down by suppressing the separation phenomenon between the subject and the curing agent when the adhesive composition is applied to the adhesive sheet or the adhesive, and it is possible to use various known various substances such as silica, acryl copolymer and the like But it is preferable to use a clay.

Clay is an aggregate of fine hydrated silicate minerals. It refers to a material that is mixed with an appropriate amount of water and kneaded to produce plasticity, exhibits rigidity when dried, and sintered when baked at a high temperature.

Specifically, at least one powder selected from the group consisting of kaolinite, fumed silica and bentonite may be used, but in order to obtain the best effect, it is preferable to use a mixture of fumed silica and bentonite in a weight ratio of 1: 1.

The thixotropic agent is preferably contained in an amount of 1 to 20 parts by weight based on 30 to 90 parts by weight of the ethylene vinyl acetate resin. When the thixotropic imparting agent is less than 1 part by weight, the flowability can not be sufficiently controlled, If the amount is more than 50 parts by weight, the flowability may be excessively vanished and the productivity may be lowered.

In addition, the subject may further include sodium silicate to improve the adhesive strength of the adhesive sheet or adhesive to be produced.

Unlike conventional adhesives, sodium silicate does not cause pollution and is environmentally friendly and has excellent adhesion.

The sodium silicate is preferably contained in an amount of 3 to 7 parts by weight based on 30 to 90 parts by weight of the ethylene vinyl acetate resin based on the solid content. When the amount of the sodium silicate is less than 3 parts by weight, If it exceeds 7 parts by weight, miscibility with other components may be deteriorated.

The subject may further include molybdenum disulfide to improve the abrasion resistance of the adhesive sheet or adhesive to be produced.

Molybdenum disulphide (MoS2) is found in thin veins in minerals and is mined and used as a lubricant.

Molybdenum disulfide (MoS2) has inherent characteristics of a hexagonal crystal structure in which shear is easily generated, such as graphite, but the lubricating action is superior to that of graphite.

The molybdenum disulfide is preferably contained in an amount of 1 to 5 parts by weight based on 30 to 90 parts by weight of the ethylene vinyl acetate resin based on the solid content. When the amount of the molybdenum disulfide is less than 1 part by weight, the abrasion resistance can not be effectively improved. If it is exceeded, it may rather deteriorate the adhesive strength.

At this time, copper powder may be mixed with molybdenum disulfide.

Further, the subject may further include a flame retardant agent to improve the flame retardancy of the adhesive sheet or adhesive to be produced.

The flame retardant is preferably contained in an amount of 1 to 5 parts by weight based on 100 parts by weight of the ethylene vinyl acetate resin. When the flame retardant is less than 1 part by weight, the degree of improvement of the flame retardancy is insignificant. In addition, there is a fear that the miscibility with other components may deteriorate.

The flame retardant can be a white powder, which can be a potassium alum (potassium aluminum sulfate, AlK (SO 4) 2 .12H 2 O) and can be obtained from natural alum.

Concretely, it can be produced by dissolving alunculus in water and filtering it, then breaking it, and cooling it if irregularly shaped crystals are formed.

In addition, the subject may further include aluminum hydroxide to improve the antibacterial property of the adhesive sheet or adhesive to be produced.

As the aluminum hydroxide, boehmite (AlO (OH)) is preferably used.

Boehmite can be any of γ-boehmite, a-boehmite, and pseudo-boehmite. Among them, boehmite is excellent in crystallinity, excellent in thermal stability and chemical stability, structurally neutral, It is preferable to use an excellent? -Behoeite.

The γ-boehmite can be produced by supercritical synthesis of only water (pure water) and aluminum (Al).

It is preferable that aluminum hydroxide is contained in an amount of 5 to 10 parts by weight based on 30 to 90 parts by weight of ethylene vinyl acetate. When the content of aluminum hydroxide is less than 5 parts by weight, it is difficult to exhibit the antimicrobial effect to be achieved, There is a possibility that the miscibility with other components may be impaired.

As the curing agent, those containing an isocyanate compound can be used.

The isocyanate compound has excellent solubility in water, and the curing agent can be uniformly mixed to the subject to maintain the proper viscosity and hardness, thereby shortening the curing time, and prolonging the pot life when mixing the curing agent with the curing agent, It has a remarkable improvement.

The isocyanate compound is preferably a compound containing at least two isocyanate groups in one molecule, and is preferably a compound containing at least two isocyanate groups in a molecule, such as toluene-diisocyanate (TDI), hydrogenated TDI, trimethyl propane-TDI Tripe- nylmethane-triisocyanate (TTI), diphenylmethane-4,4-diisocy- anate (MDI), hydrogenated MDI, or hexamethylene-diisocyanate , And it is preferable that the curing agent is included in an amount of 1 to 20 parts by weight based on 100 parts by weight of the subject.

The above-mentioned adhesive composition is prepared by mixing a subject and a curing agent to prepare an aqueous two-part adhesive composition, and then applying and curing the composition to a work site. If necessary, the adhesive composition may be partially or completely removed, And may further contain a dispersing agent, an antifoaming agent, an antiseptic agent, a thickening agent and the like within the range not hindering the object of the present invention, and may further include a coloring component to realize various colors of the adhesive sheet or adhesive to be produced .

Hereinafter, the composition and effect of the adhesive composition according to the present invention will be described in more detail through specific examples and comparative examples. However, this embodiment is intended to explain the present invention more specifically, and the scope of the present invention is not limited to these embodiments.

[Example 4]

80 parts by weight of ethylene vinyl acetate, 20 parts by weight of polyvinyl alcohol, 25 parts by weight of water, 10 parts by weight of calcium carbonate, 1 part by weight of a surfactant and 5 parts by weight of a thixotropic agent were mixed to prepare a subject. Toluene-diisocyanate and 25 parts by weight of a curing agent containing toluene-diisocyanate (TDI) were mixed and cured to prepare an adhesive sheet or an adhesive.

At this time, a gemini surfactant having 8 carbon atoms was used as a surfactant. The overall process of synthesis of the surfactant started with the reaction of diamine with 1-bromoalkane. 0.1 mole of N, N, N ', N'-tetramethyl-1,3-diaminopropane (N, N', N'- -bromooctane) was added to 300 g of acetonitrile and stirred for 30 minutes. The solution was refluxed at 353 K for 12 hours, and then the acetonitrile solvent was removed using a rotary evaporator. 500 g of diethylether was added to the resulting product to recrystallize the product. After filtering, it was washed with 500 g of diethyl ether and unreacted impurities were removed.

The product thus obtained was treated in a 323 K vacuum oven for 12 hours to remove residual solvent to prepare a gemini surfactant.

[Example 5]

Except that 5 parts by weight of atomium oxide and 5 parts by weight of zirconium oxide were further added in the form of powder to the subject.

[Example 6]

Except that 5 parts by weight of sodium silicate, 3 parts by weight of molybdenum disulfide, 3 parts by weight of alumina and 8 parts by weight of? -Behohexite were further added in powder form to the subject. Respectively.

[Comparative Example 2]

A comparative example 2 is a conventional epoxy ondol floor adhesive (SEP-4300, manufactured by Samchang Korea).

[Experimental Example 4: Adhesion Test]

An adhesive strength test (KS F 4715) was carried out for the Example and Comparative Example 2, and the results are summarized in Table 4 below.

The adhesion strength of the LH construction was 0.8 N / mm 2 or more as the acceptance standard, and all of the examples 4 to 6 and the comparative example 2 satisfied the acceptance criteria. However, it was found that the bonding strengths of Examples 4 to 6 were superior to those of Comparative Example 2.

[Experimental Example 5: Evaluation of heat resistance]

The adhesive sheets or adhesives of Examples 4 to 6 and Comparative Example 2 were heated for 8 hours in a hot-air circulating heating furnace maintained at 80 캜, and the yellowing degree was visually observed. The results are shown in Table 5 .

As can be seen from Table 5, in Examples 4 to 6, yellowing portions were hardly observed unlike Comparative Example 2. As a result, it was found that the heat resistance of the example was much better than that of Comparative Example 2.

[Experimental Example 6: Evaluation of antimicrobial activity]

The adhesive compositions of Example 6 and Comparative Example 2 were subjected to an antibacterial activity test (JIS Z 2801). Aspergillus niger ATCC 9642 (fungus) was used as a test strain and the antibacterial activity (antibacterial activity value) was evaluated and shown in Table 6 below.

The antimicrobial activity value refers to a value obtained by evaluating the degree of antimicrobial activity by comparing the number of strains cultured for a certain period of time. When the value is 1 or more, 90% or more of the strains are present, 2 or more are 99% , More than 99.99% of the strain is over 4, and more than 5 is more than 99.999% of the strain is killed.

As can be seen from the above Table 6, Example 6 including gamma-boehmite showed excellent antimicrobial activity as compared with Comparative Example 2.

Figs. 3 to 6 are views for explaining the bending support shown in Fig. 1. Fig.

Referring to FIG. 3, the bending support 300 includes a main bending die 310 and two sub-bending dies 320-1 and 320-2.

Here, the two sub-bending dies 320-1 and 320-2 are symmetrical with respect to each other with the main bending die 310 interposed therebetween and have the same structure. One sub-bending die 320 -1), and the corresponding configurations can be similarly applied to the other sub-bending die 320-2.

The main bending die 310 has an iron plate placed on a center portion of the main bending die 310. The main bending die 310 has a V-shaped bent groove (not shown) formed at a center portion thereof facing the lower side of the bending pressing portion 200 so that the bending pressing portion 200 can be pressed down 313 are formed in the longitudinal direction and connected between the two sub-folding dies 320-1, 320-2 so as to rise or fall in the vertical direction.

The main bending die 310 is provided at one side and the other at the both sides of the die main body 311 opposite to the pinion gear 324 of the sub bending die 320, It can be formed on the other side.

The sub bending die 320 is connected to one side and the other side of the main bending die 310 and raises or lowers the main bending die 310.

In one embodiment, sub-bending die 320, die body 321, bending wing 322, drive gear 323, and pinion gear 324 can be included.

The die main body 321 is located at one side of the main bending die 310 and the inside of the upper portion is connected to the inside of the bending wing 322 to rotate so that the drive gear 323 is moved up and down in the vertical direction And a pinion gear 324 is connected to the inner space so that the driving gear 323 is engaged with the pinion gear 324 so that the pinion gear 324 is raised or lowered in the vertical direction.

The bending blade 322 is connected to the upper portion of the inner side of the die main body 321 facing the main bending die 310 and rotates while the upper portion of the drive gear 323 is connected to the outside of the bending blade 322, 323).

The drive gear 323 is vertically connected to the die main body 321 so as to be engaged with the pinion gear 324 so as to move upward or downward in correspondence to the rotation of the pinion gear 324, Thereby raising or lowering the outer side of the bending wing 322 connected thereto.

The pinion gear 324 is connected to a driving device such as a step motor and is driven under the control of the bending control unit 400. One side of the pinion gear 324 corresponding to the sub bending die 320 is connected to a gear The main bending die 310 is moved up or down while the other one side is engaged with the drive gear 323 so as to raise or lower the gear gear 312 and the drive gear 323 at the same time.

At this time, the gear gear 312 and the drive gear 323 do not rise or fall in the same direction, but when the gear gear 312 rises, the drive gear 323 falls and the gear gear 312 The drive gear 323 is raised.

4 shows a state in which the main bending die 310 is lowered. In this case, as shown in Fig. 4, the bending wing 322 is lifted upward and the bending groove 313 and the bending wing 322, Are formed to have the same inclination angle to form a 'V' shape as a whole larger than the groove of the bending groove 313.

5 and 6 are views for explaining driving of the bending support part 300 according to the present invention.

5, in the state where the main bending die 310 is lowered as shown in FIG. 4, when the pinion gear 324 formed on the right side rotates in the counterclockwise direction, the lever gear 312 is driven in the downward direction, As the drive gear 323 is driven upward and the outside of the bending wing 322 connected to the upper portion is lifted, the bending wing 322 rises to form a V shape as a whole.

Accordingly, as a user, it is possible to acquire more stable space for placing the iron plate in that case, thereby achieving operational stability, and of course, the iron plate can be curved with a curvature larger than that of the iron plate, .

6 shows a state in which the main bending die 310 is lifted and when the pinion gear 324 formed on the right side rotates clockwise, the gear wheel 312 is driven in the upward direction and the drive gear 323 is moved in the downward direction The bent wing 322 descends and is positioned in parallel with the upper side of the die body 321 as the outer side of the bent wing 322 connected to the upper portion is lowered.

As a result, the user can bend the steel plate under the same conditions as the existing fixed bending apparatus in that case, and can utilize the plane formed by the bending wings 322 on both sides of the die body 311, And can be utilized as a rack on which the work tool of the present invention can be placed.

It will be apparent to those skilled in the art that various modifications and variations can be made in the present invention without departing from the spirit or scope of the present invention as defined by the following claims. You will understand.

10: Iron plate bending device 100: Housing part
200: Bending pressing part 300: Bending supporting part
310: main bending die 311: die body
312: Rack gear 313: Bending groove
320-1, 320-2: sub-bending die
321: die body 322:
323: drive gear 324: pinion gear
400: bending control unit 500: control pedal unit
510: Pedal main body 520:
530: Pedal protection sheet

Claims (2)

A housing part forming a body of the iron plate bending device;
A bending and pressing part connected to an upper part of a front surface of the housing part and driven in a vertical direction so as to bend an iron plate in a required shape so as to press the iron plate;
A bending support part which is connected to the lower part of the front surface of the housing part so as to be opposite to the bending part and forms a pedestal for supporting the bending part of the bending steel plate;
A setting value of at least one of a vertical driving height, a driving force, a driving speed, and a vertical driving direction of the bending pressing portion is set as an input from a user, and when a driving request signal is received, A bending control unit for driving the bending and pressing unit; And
And a control pedal part connected to the outside of the housing part by wire or wirelessly, receiving a driving request of the bending and pressing part from a user, generating a driving request signal corresponding thereto, and transmitting the driving request signal to the bending control part,
The control pedal portion,
110 to 130 parts by weight of high density polyethylene resin (HDPE), 170 to 190 parts by weight of Talc 170 to 190 parts by weight based on 100 parts by weight of polypropylene resin so as to radiate far infrared rays that improve mechanical properties and twisting phenomenon and promote the metabolism of the body, 1 to 10 parts by weight of germanium powder, 15 to 25 parts by weight of glass fiber reinforced plastic, 2 to 7 parts by weight of glue, 5 to 10 parts by weight of cork powder, 1 to 4 parts by weight of sucrose (C12H22O11) 5 parts by weight of boehmite (Boehmite, AlO (OH)) and 3 to 8 parts by weight of boehmite (Boehmite, AlO (OH)) and having a specific gravity of 1.02 to 1.10 and formed in the form of a pedal that the user can step on;
A driving request unit installed inside the pedal body for generating a driving request signal after sensing the user pressing the pedal body and transmitting the driving request signal to the bending control unit through wired or wireless communication; And
(PVA), 10 to 30 parts by weight of water, 5 to 30 parts by weight of calcium carbonate, and 5 to 30 parts by weight of a polyvinyl alcohol (PVA) based on 30 to 90 parts by weight of an ethylene vinyl acetate 0.1 to 1 part by weight of a surfactant, 1 to 20 parts by weight of a thixotropic agent, 3 to 7 parts by weight of sodium silicate, 1 to 5 parts by weight of molybdenum disulfide (MoS2), 5 to 10 parts by weight of aluminum hydroxide, Toluene-diisocyanate (TDI), hydrogenated TDI, trimethyl propane-TDI, tripehnylmethane-triisocyanate (TTI), and mixtures thereof with 10 to 30 parts by weight of water. Diisocyanate (MDI), hydrogenated MDI, and hexamethylene-diisocyanate (HDI). The isocyanate compound may be selected from the group consisting of isophorone diisocyanate, diphenylmethane-4,4-diisocyanate Lt; / RTI > The 100 parts by weight with respect to the pedal including a protective sheet attached to the upper portion of the pedal body by means of an adhesive composition comprising a curing agent that is an amount of 1 to 20 parts by weight to prevent wear of the pedal body
, Iron plate bending device.


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