KR200389735Y1 - styrofoam electrothermal wire of cutter - Google Patents

Abstract

The present invention relates to a hot wire cutter used to cut a foamed synthetic resin material, in particular in the front / rear end of the gripping rod 120 is provided with a power switch unit 110 that can be turned on (ON) / off (OFF) operation Connection body (130A, 130B) and connector fastener 140 is coupled to each of the main body portion 100 is formed to be connected to each other so that the power supply is intermittent according to the operation of the power switch unit 110; One end is configured to be coupled to the connection fasteners (130A, 130B) blade holder in which the insulating member 212 and the metal fixing ring 213 through which the coupling hole 211 penetrates in the inner center are housed and coupled inside the other end ( 210A) is provided, and the heating wire 221 whose outer surface is covered with the insulating member 222 is housed therein at the center of the other end of the blade holder 210A so that the cathode (-) and the cathode (+) are energized. The cutting edge portion made of a cutting rod 220A fixed by the end of the heating wire 221, the rear end portion of the heating wire 221 is drawn out to the outside and is bent by the insulation tube 223 and grounded. 200; The wire of the set length is extended out to one side of the transformer 310, which is capable of adjusting the supply power to the set rectification and voltage, and the connector fastener 140 and the power supply to the main body portion 100 at the end thereof. Combinable connector 320 is provided and the other side is characterized by consisting of a power connection portion 300 is formed with a plug 330 is connected to a wire so that power is applied to the electrical outlet.

According to the present invention as described above, first, the user has a general soft styrofoam, and the user is more precise and delicate when crafting or learning the work, cutting, cutting, working, carving, etc. It is possible to carry out work while easily changing blades of various shapes as desired. Second, since the joints of the main body and the blade joints of the blades are firmly fastened to each other by screwing, work such as cutting, cutting, machining, engraving, etc. If the blade in use is not separated and bent due to the external force applied to the blade during operation, it will be restored by natural elasticity to some extent and if the bending state is severe, the worker will be able to reuse it by restoring the blade by applying force after the power is cut off. It is economical due to the low replacement cost due to the back and so on. Third, the heating wire is concealed by being installed in the cutting knife. It prevents damage or breakage of the heating wire, so there is no disconnection, which improves the merchandise and reliability of the product.In addition, the heating area is small, so that the entire cutting knife can be quickly heated and used quickly to increase the work efficiency. There are effects.

Description

Styrofoam electrothermal wire of cutter

The present invention relates to a hot wire cutter for cutting a foamed synthetic resin material, and in particular, when a blade in which a heating wire is installed is supplied with power and heated at a set temperature, the styrofoam is cut, cut, and processed. Styrofoam hot wire cutters are designed for easy and convenient replacement of various blades formed according to their shape and shape, in order to process styrofoam into a desired shape and shape as well as simple and easy use when engraving. It is about.

In general, electric heat is a method of flowing a current through a heating wire, which is a nichrome wire, or flowing an electric current in an arc type, that is, a method of generating heat obtained by energizing a current. The dielectric loss occurs when a current flows through a resistance wire, an electric current flows while an arc is generated, an electric current flows through a good conductor such as a metal, or when a high frequency electric field is applied to an insulator. There is a method of using a magnetic field, and the like, heat generated when converting electrical energy into thermal energy is collectively referred to as electrothermal.

Electrothermal wire using this is a nichrome wire (resistance wire) specially manufactured for heating at high temperature by using a heat-generating action by electric current, and it is a wire made of a conductor material that resists high temperature, has high resistivity, and is easily made of wire. It is a kind of alloy of iron and chromium, nickel and chromium alloy is widely used. The service temperature is around 1,000 ° C. In addition, resistance wires such as tungsten and platinum are also used, and are widely used in electric furnaces and electric heaters. In addition, resistance heating elements molded and sintered based on silicide, molybdenum, silicon carbide, and the like are used as heating wires.

As described above, the electric heating using the heating wire can be seen that there are many advantages compared with the use of fossil fuels such as coal or petroleum.

First, higher temperatures can be easily obtained and temperature control is easier.

Second, you can heat objects in a closed or vacuum place,

Third, no smoke or ash can remain.

Therefore, electric appliances using electric heating are a variety of home appliances / furniture products such as electric appliances, electric heating appliances, electric iron, electric stove, hair dryer, etc. In addition, work, learning and medical products and devices, and a number of tools and devices used in various industrial fields, etc. are conveniently and efficiently used in various fields.

As described above, the styrofoam heating wire cutters applied by using heating wires that are efficiently applied and used in various fields are as follows.

In general, a styrofoam heating wire cutter is a table-type heating wire cutter configured to be fixedly installed on a table with a heating wire connected in a straight line in a setting direction, and to be moved or cut in a state by seating a styrofoam to be processed on the table. Rather, it is possible to cut freely, making it easy to carry out work such as work, cutting, and engraving, and there is a hand-held hot wire cutting machine that cuts evenly the foamed styrofoam into a plate shape at a set thickness while passing through a plurality of hot wires. There is also an industrial cutting device.

Among them, the table-type hot wire cutter (not shown) is a simple configuration of the grid-shaped support on one side of the upper surface of the table, the end of the support and the upper surface of the table vertically aligned with the end of the support is a conductor Fixing brackets are coupled to each other, a heating wire is tightly coupled to the fixing bracket, the power supply cable for applying power is connected to the fixed bracket of the heating wire is configured, the power switch is provided on the power cable.

When cutting the styrofoam into a specific shape using the table-type hot wire cutter, first, turn on the power switch to apply power to the heating wire so that the heating wire is heated, and then touch the cut portion of the styrofoam with the heated heating wire. The cutting part of the styrofoam in contact with the heating wire is pushed to cut while cutting and cutting the styrofoam.

However, conventional table heater

First, since the styrofoam, which is a relatively large plate, is pushed or pulled and moved to cut the styrofoam into a specific shape, it is difficult to work, and when the power applied to the heating wire is applied with an overvoltage, the heating wire is overheated and cut off. There are many common drawbacks to interrupting cutting operations.

Second, due to the structural size and volume of the table, it is difficult to easily install and carry, and thus there is a limitation in use according to the working environment, and there are difficulties in the work requiring sophisticated cutting and cutting.

Third, since the heating wire heated by the power cannot be checked with the naked eye, there are problems in that a safety accident frequently occurs due to an inadvertent periphery, resulting in burns by contact with exposed body skin.

The above-mentioned, portable styrofoam cutting knife (not shown) of the domestic prior art Utility Model Registration No. 2003-11226 (2003.04.11) to improve the problems and inconveniences of the conventional table-type hot wire cutting machine has a power supply In front of the handle, a cutting knife made of an insulator is provided, and the cutting knife has a basic configuration provided with a heating member connected to a power supply of the handle part.

In addition, an insertion groove having an inner terminal is formed at the center of the front end of the handle portion, and an insertion protrusion having an outer terminal contacting the inner terminal is formed at a rear end side of the cutting blade to detach the cutting blade from the handle portion. It consists of

The conventional portable styrofoam cutting knife filed in Korea is not a simple cutting object made of styrofoam, but cannot be cut only by a heating wire, that is, a cutting object made of a combination of rigid and soft materials combined with a rigid member (for example, a prefabricated building sandwich) Panel, etc.) It is a cutting blade with heating element (heating wire) and reinforcement in the general blade structure so that it can be used easily without being cut during cutting. It is easy to use styrofoam or prefabricated sandwich panel in the desired shape at the construction site. It is a cutting hand tool that can be used in combination with melt cutting and blade cutting.

Such a conventional portable styrofoam cutting knife

First, the shape and structure of the styrofoam or prefabricated building sandwich panel in the desired construction site can be easily used in combination with melt cutting and blade cutting. (截斷) and cutting work are possible, but it is difficult to use ordinary soft styrofoam in the work of making delicate and delicate shapes and shapes such as work and sculpture.

Second, when the blade is damaged, the internal terminal is formed in the insertion groove of the handle part and the insertion protrusion with the external terminal at the rear end of the cutting blade is detachable from the handle part, but the blade is in use due to use environment or working conditions. It is frequently detached from the insertion groove, causing inconveniences in the work, and the usability of the cutting blade is limited due to frequent damage due to external force applied during the work.

Third, the heating wire is arranged along the outer surface of the blade of the cutting blade exposed to the outside, so that the heating wire is damaged during work, so frequent disconnection of the product leads to poor productability and reliability of the product. It has to be heated, so there is a drawback to deteriorating the work efficiency by long waiting time for cutting blade heating,

Fourth, a safety accident that frequently causes burns by contacting the heated heating wire or the cutting blade with exposed body skin due to ineligibility during work due to the fact that the heating wire or the cutting blade heated by the power applied is not confirmed with the naked eye. There were problems.

Accordingly, the present invention has been made to solve the fundamental problems of the prior art, the purpose of which is to cut the styrofoam or the like when the blade is heated to the set temperature is supplied with power to the heating wire built-in A variety of blades with corresponding shapes according to the shape and shape, in order to carry out precise and delicate machining work with the desired shape and shape, as well as simple and easy use for work, work and engraving. To provide a styrofoam hot wire cutter that can be easily replaced and easily used.

In order to achieve the above object, the present invention is connected to the connection fasteners and the connector fasteners on the front / rear end of the gripping rod with a power switch capable of ON / OFF (OFF) operation is fixed to the power switch A main body part formed to be connected to each other so that the power supply may be interrupted according to the operation of the part; One end is coupled to the connection fastening portion is provided with an insulating member through which the coupling hole penetrates in the inner center and a blade holder in which the metal retaining ring is housed and coupled to the other end. The outer surface of the blade holder is provided at the center of the outer end. The heating wire coated with the insulating member is housed inside, and the cathode (-) and the anode (+) are energized to be crimped and connected to the front end to be heated, and the rear end portion of the heating wire is bent to the outside at the rear end. A cutting blade portion formed of a blade rod which is wrapped by an insulating tube and fixed to ground; On one side of the transformer that can adjust the supply power to the set rectification and voltage, the length of the set wire is extended out, and at the end thereof is provided with a connector that can be combined with the connector fastening to enable power supply to the main body, and the other side to the electrical outlet It provides a styrofoam heating wire cutter, characterized in that consisting of a power connection portion is formed plug is connected to the wire so that the power is applied.

(Example)

Hereinafter, with reference to the accompanying drawings, preferred embodiments of the present invention as described above in more detail as follows.

1 is a perspective view of a styrofoam cutter according to a preferred embodiment of the present invention, Figure 2 is a cross-sectional view of the styrofoam cutter of the present invention, Figure 3 is a state in which the blade portion and the power connection portion are separated from the styrofoam cutter of the present invention, respectively 4 is a perspective view showing another embodiment of a styrofoam cutting machine according to the present invention, Figure 5 is a cross-sectional view of another embodiment product according to Figure 4, Figure 6 is another embodiment of the product according to Figure 4 A perspective view showing a state in which the blade and the power connection are separated, respectively, Figures 7a to 8c are views showing the respective forms of the cutting knife of the blade portion for the styrofoam cutter according to each embodiment of the present invention.

As can be seen from this, the styrofoam hot wire cutter of the present invention is connected to the wire / rear end of the gripping rod 120 is provided with a power switch unit 110 that can be turned on (ON) / off (OFF) operation (130A, 130B) and the connector fasteners 140 are coupled to each other and the main body portion 100 is formed to be interconnected so that the power supply is intermittent according to the operation of the power switch unit 110; One end is configured to be coupled to the connection fasteners (130A, 130B) blade holder in which the insulating member 212 and the metal fixing ring 213 through which the coupling hole 211 penetrates in the inner center are housed and coupled inside the other end. (210A) is provided, in the center of the other end of the blade holder (210A) is housed inside the heating wire 221, the entire outer surface is covered with an insulating member 222 to accommodate the negative (-) and positive (+) A cutting blade made of a blade rod 220A fixed by grounding and being electrically connected to each other by crimping the front end to be heated to be connected to each other, and having a rear end portion of the heating wire 221 bent outwardly and wrapped by an insulating tube 223. A part 200; The wire of the set length is extended out at one side of the transformer 310, which is capable of adjusting the supply power to the set rectification and voltage, and at the end thereof, the connector fastening hole 140 and the power supply to the main body 100. Combinable connector 320 is provided and the other side is composed of a power connection portion 300 is formed with a plug 330 is connected to the wire so that power is applied to the electrical outlet.

Here, the gripping rod 120 of the main body portion 100 is hollow in a cylindrical shape, both ends of the open side and the button receiving hole 121 is formed through the outer peripheral side of the front end portion is connected to the power source therein Power switch provided with the positive (+) terminals to enable the power on (ON) / off (OFF) with the push button 112 protruding through the button receiving hole 121 to operate from the outside The unit 110 is accommodated and fixedly formed.

In addition, the connection fastener 130 of the main body portion 100 is mutually coupled with the spring 133 so as to enable elastic operation and the contact terminal 134 connected with the positive terminal (+) terminal 111 of the power switch unit 110. Insulated holder 131 formed to be enclosed and wrapped inside the whole, and the center is penetrated through the inner step is inserted into the stepped hole in the center with a corresponding size so that the insulating holder 131 is fitted to accommodate the installation ( 136 is penetrated and directly connected to an electric wire fused and fixed to the negative terminal (143) coupled to the holder 142 of the connector fastener 140, and the other end of the tapping to be screwed to the outer surface ( Coupling portion 137 is formed is formed is formed by the base 132 protruding the fastening protrusion 138 is fitted to one end of the main body portion 100 to be firmly coupled and fixed.

In addition, one end of the connector fastening hole 140 of the main body portion 100 is inserted into the hollow insulating member 145 to be accommodated and fixed, and the other end protrudes outward so that the positive terminal (+) of the power switch unit 110 ( 111 and a hole having a corresponding size are formed through the contact terminal body 141 interconnected with the contact terminal 141 and the insulating member 145 in which the contact terminal body 141 is internally inserted at one end thereof. A coupling part 144 tapping is formed to be coupled to each other, and a coupling ring 146 and a cathode terminal (143) protruding from the coupling protrusion 146a are inserted into the coupling part 144 to lock the nut 147. ) And the washer 148 is formed of a holder 142 is formed by combining sequentially.

The cutting blade portion 200 is formed with a screw thread for fastening on one side end inner surface to be coupled to the connection fastener (130A) and the insulating member 212 and the metal fixing ring 213 through which the coupling hole 211 in the center ) Is provided with a blade holder (210A) is coupled to the other end inside, the heating wire (221) is housed in the center of the other end of the blade holder (210A) the entire outer surface is covered with an insulating member 222 The cathode (-) and the anode (+) are energized so as to be crimped and connected to the front end so as to be heated.The rear end portion of the heating wire 221 is bent to the outside and is bent to the outside and wrapped by the insulating tube 223 to be grounded. It is formed of a fixed blade rod (220A).

On the other hand, as shown in Figs. 7a to 8c of the accompanying drawings, the cutting blade unit 200 is cut, cut, machined, carved work is carried out according to the conditions of the work or the shape and shape of the object, more sophisticated and delicate It can be formed by bending in various forms such as "a" shape, "∩" shape, "∧" shape so that the work can be performed.

In addition, as shown in FIGS. 4 to 6 of the accompanying drawings, the connection fastener 130B having another structure has a fastening protrusion 138a protrudingly formed at one end thereof, and a fitting hole 136a is formed stepped through the center thereof. One end is wrapped with the base 132b and the insulating member 135a and the other end protrudes outward, and the positive terminal (111) of the power switch unit 110 is formed on the other end of the inner side to be screwed to the inner side. And a contact terminal 134a connected to each other are formed at one end of the gripping rod 120 of the main body part 100 so as to be formed at a coupling part 137a which is fixed to be fitted at one end and screwed to an inner surface of the other end thereof. It may be formed to be used in combination with.

At this time, as shown in Figures 4 to 6, the cutting blade portion 200 is required to be coupled to the connection fastener 130B and the blade rod 220B is heated in accordance with the power supply, the cutting blade portion ( 200 is formed with an elastic coupling portion 214 formed by cutting at one end at a predetermined interval, and the coupling hole 211a penetrates at the center thereof, and an insulating member 212a and a metal tube 215 hollow inside are formed. A blade holder 210B is inserted and coupled to each other, and a heating wire 221a coated with an insulating member 222a is housed therein at the center of the other end of the blade holder 210B. A positive electrode (+) is energized and pressed to interconnect the front end to enable heating, and the rear end portion of the heating wire (221a) is drawn out to the outside and bent to the outside and welded to the outer surface of the metal tube 215 fixed blade bar ( 220B).

Styrofoam hot wire cutter of the present invention configured as described above is connected to the connector 320 of the power connection unit 110 to the connector fastening portion 140 of the main body portion 100 and then connected to the power supply plug 330 When electricity is supplied by plugging into an electrical outlet, the power controlled through the transformer 310 at the set rectification and voltage is supplied to the main body 100 through the connector 320. At this time, when the user presses the push button 112 provided on the gripping rod 120 of the main body 100, the power is transmitted to the heating wire 221 and heated to the set temperature, thereby causing the heat conduction to the blade rod 220A. In this state, cutting, cutting, machining, engraving, etc. of the strofoam of the user's desired machining are precisely and delicately performed.

And it is possible to easily replace the cutting blade unit 200 formed in various forms according to the user's selection in the working process.

According to the present invention as described above,

First, it has a general soft styrofoam and can easily cut the blades of various shapes that the user wants when cutting, cutting, working, carving, etc. You can do it while replacing it,

Second, since the connection fastener of the main body and the blade joint of the blade part are firmly fastened and fixed together by screwing together, the blade in use is not separated and separated during cutting, cutting, work, engraving, etc. If it is bent, it is restored to some extent by natural elasticity, and if the bending state is severe, it can be reused by restoring power by hand after the power is cut off.

Third, since the heating wire is concealed because it is built in the cutting knife, it prevents the heating wire from being damaged or damaged during operation, so there is no disconnection, which improves the productability and reliability of the product. There is an effect of increasing the efficiency of the work can be heated quickly enough to use inside.

Although the present invention has been shown and described with reference to certain preferred embodiments, the present invention is not limited to the above-described embodiment, and the general knowledge in the technical field to which the present invention belongs without departing from the spirit of the present invention. Various alternative changes and modifications will be possible by the possessor.

1 is a perspective view of a styrofoam cutter according to the present invention,

2 is a cross-sectional view of the styrofoam cutter of the present invention,

Figure 3 is a perspective view showing a state in which the blade portion and the power connection respectively separated in the styrofoam cutter of the present invention,

4 is a perspective view showing another embodiment of a styrofoam cutter according to the present invention,

5 is a cross-sectional view of another embodiment product according to FIG. 4;

Figure 6 is a perspective view showing a state in which the blade portion and the power connection portion of the other embodiment product according to Figure 4, respectively,

7a to 8c are views showing the respective forms of the cutting knife blade portion for the styrofoam cutter according to embodiments of the present invention.

<Description of Symbols for Major Parts of Drawings>

100: main body, 110: power switch

111: positive terminal (+), 112: pushbutton

120: gripping rod, 121: button receiving hole

130: connection fastener, 131: insulated holder

132: base, 133: spring

134: contact terminal, 136: fitting hole

137 (144): coupling part, 138: fastening protrusion

140: connector fastening holes, 141: connection terminal itself,

142: holder, 143: negative (-) terminal

145 (212, 212a, 222, 222a): insulation member

146: fastening ring, 146a: fastening protrusion

147: tightening nut, 148: washer

200: cutting blade portion, 210A (210B): blade holder

211 (211a): engaging hole, 213: metal retaining ring

214: elastic coupling portion, 215: metal tube

220A (220B): Blade bar 221 (221a): Heating cable

223: insulation tube, 300: power connection

310: transformer, 320: connector

330: plug

Claims (6)

Connection fasteners 130A and 130B and connector fasteners 140 are respectively coupled to the line / rear end of the gripping rod 120 provided with the power switch unit 110 capable of ON / OFF operation. A main body part 100 that is fixed and is connected to each other so that power supply is intermittent according to the operation of the power switch unit 110; One end is configured to be coupled to the connection fasteners (130A, 130B) blade holder in which the insulating member 212 and the metal fixing ring 213 through which the coupling hole 211 penetrates in the inner center are housed and coupled inside the other end. (210A) is provided, in the center of the other end of the blade holder (210A) is housed inside the heating wire 221, the entire outer surface is covered with an insulating member 222 to accommodate the negative (-) and positive (+) A cutting blade made of a blade rod 220A fixed by grounding and being electrically connected to each other by crimping the front end to be heated to be connected to each other, and having a rear end portion of the heating wire 221 bent outwardly and wrapped by an insulating tube 223. A part 200; The wire of the set length is extended out at one side of the transformer 310, which is capable of adjusting the supply power to the set rectification and voltage, and at the end thereof, the connector fastening hole 140 and the power supply to the main body 100. Styrofoam hot wire cutter characterized in that the connector 320 is provided and the other side is composed of a power connection portion 300 is formed with a plug 330 is connected to the wire so that the power is applied to the electrical outlet. The method of claim 1, The gripping rods 120 are hollow in a cylindrical shape, both sides of which are open, and a button accommodation hole 121 is formed on the outer circumferential surface of the front end, and has positive (+) terminals connected therein. The power switch unit 110 provided to turn the power on (ON) / off (OFF) by the push button 112 protruding through the button receiving hole 121 to be operated from the outside is received and fixed Styrofoam heating wire cutter, characterized in that formed. The method of claim 1, The connection fastener 130 is mutually coupled with the spring 133 so as to enable elastic operation, and the entire contact terminal 134 connected to the positive electrode (+) terminal 111 of the power switch unit 110 is housed therein. Insulation holder 131 made to be wrapped, The inside of the center is stepped through, and the insulating holder 131 is inserted into a corresponding size so that the mounting can be accommodated. The fitting hole 136 is formed through the inside of the center, and the holder 142 of the connector fastener 140 is formed. The main body portion 100 is formed by a coupling part 137 which is directly connected to the electric wire fused and fixed to the negative electrode terminal 143 coupled to the terminal), and a tapping process is formed on the other end to allow screwing to the outer surface. Styrofoam hot wire cutter, characterized in that consisting of a base 132 protruding fastening protrusion 138 is fitted to be firmly coupled to one end. The method of claim 1, One end of the connector fastening hole 140 is inserted into the hollow insulating member 145 and fixedly received, and the other end thereof protrudes outward so that a contact end connected to the positive terminal (+) terminal 111 of the power switch unit 110 is interconnected. Itself 141, A hole having a corresponding size is formed therethrough so that the entire insulating member 145 having the contact terminal body 141 embedded therein is fitted at one end thereof, and a coupling part 144 having a tapping process is formed on the outer surface of the other end. A holder formed by coupling the fastening ring 146 and the negative terminal (143) with the fastening protrusion 146a protruding from the coupling part 144 to the fastening nut 147 and the washer 148 sequentially. Styrofoam heating wire cutter, characterized in that consisting of (142). The method of claim 1, The cutting blade portion 200 is formed with a screw thread for fastening on one side end inner surface to be coupled to the connection fastener (130A) and the insulating member 212 and the metal fixing ring 213 through which the coupling hole 211 in the center ) Is provided with a blade holder (210A) is coupled to the other end inside, the heating wire (221) is housed in the center of the other end of the blade holder (210A) the entire outer surface is covered with an insulating member 222 The cathode (-) and the anode (+) are energized so as to be crimped and connected to the front end so as to be heated.The rear end portion of the heating wire 221 is bent to the outside and is bent to the outside and wrapped by the insulating tube 223 to be grounded. Styrofoam heating wire cutter, characterized in that formed by a fixed blade bar (220A). The method of claim 1, The cutting blade unit 200 is a cutting, cutting, cutting, machining, engraving work of the styrofoam according to the conditions and shape and shape of the object, the roughly "a" shape to be able to perform the work more precisely and delicately Styrofoam hot wire cutting machine, characterized in that the bending to form a variety of shapes, such as "∩" shape, "∧" shape.