KR102592930B1 - Rebar cutting device that guarantees the convenience of blade replacement - Google Patents

Abstract

The rebar cutting device that ensures the convenience of blade replacement according to the present invention includes a cutting area where the rebar transferred by the transfer unit is located, a press that descends into the cutting area to press the rebar, and a cutting surface. A rebar cutting device including a blade module mounted on the lower side wall of the cutting area to seat the rebar transferred to the cutting area and cutting the rebar by lowering the press, and a discharge path obliquely penetrating outward from the cutting area. wherein the blade module is recessed along the longitudinal direction of the central area of the cutting surface, and has slits through which a plurality of fastening holes are penetrated at regular intervals along the longitudinal direction, and an amount of the cutting surface divided based on the slits. a main body that is recessed to a certain depth in a portion of one of the surfaces and includes a recessed groove through which a plurality of first coupling holes are penetrated at regular intervals along the longitudinal direction on the bottom surface; and a replacement block seated and coupled to the recessed groove while the second coupling hole is penetrated at regular intervals along the longitudinal direction so as to be coupled to the first coupling hole via a fastener.
According to the rebar cutting device that ensures the convenience of blade replacement according to the present invention, only the parts that are substantially worn in the blade module can be conveniently and quickly supplemented by replacing the replacement block.

Description

Rebar cutting device that ensures convenience of blade replacement {REBAR CUTTING DEVICE THAT GUARANTEES THE CONVENIENCE OF BLADE REPLACEMENT}

The present invention relates to a rebar cutting device that ensures the convenience of replacing blades. More specifically, in the blade module that cuts the rebar by lowering the press, the part in contact with the rebar can be easily replaced to ensure convenient usability of the blade module. It is about a rebar cutting device.

A cutting device (or cutting device) provides the function of cutting various cutting objects such as steel and wood to a desired size, and is composed of a variety of mechanical structures and types depending on the type of cutting object and cutting method.

Among these, rebar cutting devices that cut rebar often have a relatively slim structure by taking advantage of the characteristics of rebar, which has a smaller diameter than pipes or steel materials.

This rebar cutting device may also have various structures. For example, it may be configured to accommodate rebar and then press the rebar with a press so that the rebar falls and is cut along the cutting surface of a blade mounted on the side wall.

As a prior art for a rebar cutting device, the rebar cutting device of Korean Patent No. 1277643 includes a guide part formed on a conveying part through which rebars having threads formed on the outer periphery are transferred and guiding the rebars by isolating them in the longitudinal direction; a rotating part that pushes up the lower side of the rebar when the rebar is guided through the guide part and protrudes by a cutting length set at an end of the transfer part; And when the reinforcing bar is transported along the guide part by a set cutting length, a cutting part that cuts one side of the reinforcing bar through a plurality of blades that cross each other and are raised and lowered; including, when cutting the reinforcing bar due to the circular cutting hole shape. It is disclosed that the quality of the reinforcing bar is improved because the threads formed on the outer periphery of the reinforcing bar are prevented from being damaged.

On the other hand, the blade that actually cuts the rebar due to the pressure of the press wears out due to frequent friction and pressure with the rebar and needs to be replaced periodically. The blade is formed to have a sufficient area for stable cutting of the rebar. In fact, the area in contact with the rebar was concentrated in the upper part around the press, so it was inconvenient to replace the entire blade even when the lower part underneath was not worn.

However, the above-described prior art focuses on improving the quality of reinforcing bars and does not provide a solution for improving the convenience or efficiency of blade replacement.

Accordingly, there is a need to develop a rebar cutting device equipped with a new and advanced blade module that can conveniently replace only part of the blade, that is, only the part where wear occurs.

The present invention was developed to overcome the problems of the above technology, and includes forming a recessed groove in a part of the blade module and providing a replacement block that is mounted in the recessed groove via a fastener, so that the replacement block is substantially in contact with the reinforcing bar or press. The main purpose is to provide a rebar cutting device with an improved structure of a blade module that can be conveniently replaced.

Another object of the present invention is to manufacture replacement blocks from carbon alloy steel.

Another object of the present invention is to prevent sticking of the replacement block by installing a buffer pad between the recessed groove of the main body and the replacement block in the blade module.

A further object of the present invention is to improve the durability of the replacement block by coating the surface of the replacement block with a coating layer having a special composition.

In order to achieve the above object, the rebar cutting device that ensures the convenience of blade replacement according to the present invention includes a cutting area where the rebar transported by the transfer unit is located, a press that descends into the cutting area and presses the rebar, and , a blade module that is mounted on the lower side wall of the cutting area in a state with a cutting surface and cuts the rebar by lowering the press, in which the rebar transferred to the cutting area is seated, and a blade module that is inclined to the outside in the cutting area. In the rebar cutting device including a discharge path, the blade module includes a slit that is recessed along the longitudinal direction of the central area of the cutting surface and has a plurality of fastening holes penetrated at regular intervals along the longitudinal direction, and the slit is referenced. a main body including an indented groove at a certain depth in a portion of one of the two sides of the cut surface divided by a plurality of first coupling holes penetrating at regular intervals along the longitudinal direction on the bottom surface; and a replacement block seated and coupled to the recessed groove while the second coupling hole is penetrated at regular intervals along the longitudinal direction so as to be coupled to the first coupling hole via a fastener.

In addition, the replacement block is characterized by being made of carbon alloy steel.

In addition, between the recessed groove and the replacement block, a cushioning pad made of any one of an elastic material, polyurethane, thermoplastic polyurethane (TPU), and PVC is laminated.

According to the rebar cutting device that ensures the convenience of blade replacement according to the present invention,

1) It provides the advantage of being able to conveniently and quickly compensate for only the parts that actually wear out in the blade module by replacing the replacement block.

2) A buffer pad is installed between the recessed groove and the replacement block to prevent the replacement block from sticking to the main body.

3) Not only can the rigidity of the replacement block be differentially adjusted to reduce production costs by treating the materials of the replacement block and the main body the same or different, but also reducing production costs.

4) The coating layer formed on the surface of the replacement block not only ensures the durability of the replacement block, but also provides a repulsive force to the rebar, preventing the replacement block from being easily damaged.

1 is a perspective view showing a schematic appearance of the rebar cutting device of the present invention.
Figure 2 is a perspective view showing the blade module and discharge path in the cutting area.
Figure 3 is a perspective view showing a state in which the reinforcing bar transferred to the cutting area is seated on the blade module.
Figure 4 is a perspective view showing a state in which reinforcing bars are cut by the blade module as the press is lowered in Figure 3.
Figure 5 is a perspective view showing the reinforcing bar cut in Figure 3 positioned on the blade module.
Figure 6 is a perspective view showing the schematic appearance of the blade module of the present invention.
Figure 7 is an exploded view showing the detailed configuration of the blade module of Figure 6.
Figure 8 is a cross-sectional view showing the structure of a cushioning pad stacked between a recessed groove and a replacement block.
Figure 9 is a flow chart showing a process for manufacturing an enhancer included in the coating agent of the coating layer formed on the surface of the replacement block.

Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the attached drawings. The accompanying drawings are not drawn to scale, and like reference numbers in each drawing refer to like elements.

Figure 1 is a perspective view showing the schematic appearance of the rebar cutting device of the present invention, and Figure 2 is a perspective view showing the blade module and discharge path in the cutting area.

As can be seen from Figures 1 and 2, the rebar cutting device 10 of the present invention is basically in the form of a housing and includes a cutting area 20, a press 30, a blade module 100, and a discharge path 40. ) includes.

The rebar cutting device 10 of the present invention is capable of transferring the rebar to the inside of the rebar cutting device 10, that is, to the cutting area 20, by a separate transfer unit 1.

The transfer unit 1 includes a conveyor belt and rollers and is capable of transferring rebar located at a certain distance from the rebar cutting device 10 to the rebar cutting device 10 and its interior. At this time, the transfer unit 1 is shown in the drawing. As can be seen, it is also possible to provide a separate seating/storage space where the rebar can be placed in a waiting state before being placed on the conveyor belt.

This transfer unit 10 may be made of various mechanical means for transferring rebar to the rebar cutting device 10, and since the detailed configuration is the same or similar to that of the known transfer unit, a separate description of this detailed configuration will be omitted.

Inside the rebar cutting device 10, a cutting area 20, which can be said to be a kind of space where the rebar transferred through the transfer port 11 is located, is secured.

This cutting area 20 refers to the internal work space of the rebar cutting device 10. Based on this cutting area 20, a press 30 is mounted on the upper part, and a braid is installed on the lower part of the cutting area 20. A module 100 and a discharge path 40 are installed.

The press 30 moves up and down by driving a motor, and in particular, during the downward movement, it presses the reinforcing bar and has the function of causing the reinforcing bar seated in the blade module 100 to fall and be cut along the cutting surface of the blade module 100. Perform. This press 30 will also have the same mechanical structure as a known press, and of course, known driving means such as a power supply and a motor are installed to drive the press 30.

The blade module 100 is located at the lower part of the cutting area 20 and supports the reinforcing bars transferred to the cutting area 20, and then serves to deliver the reinforcing bars by the downward movement of the press 30 described above. This blade module 100 is formed on the side wall of the space between the cutting area 20 and the discharge path 40, and forms a part of this side wall and can be mounted on the side wall so as to be replaceable.

In the present invention, the surface of the braid module 100 facing the cutting area 20 is referred to as the 'cutting surface' 101, and this cutting surface 101 serves as an actual blade, that is, a blade.

This blade module 100 is made of a rigid material for cutting rebar by lowering the press 30. For example, the blade module 100 is made of carbon alloy steel, high manganese steel, stainless steel, tool steel, cast alloy steel, and It is possible to make it from any one of alloy cast iron.

The discharge path 40 refers to a passage through which rebar seated on the blade module 100 after cutting or residual rebar remaining after being cut is struck by hand or a separate mechanical means and discharged to the outside. This discharge path 40 extends at a downward slope, providing a foundation for conveniently discharging reinforcing bars.

The rebar cutting process of the rebar cutting device 10 according to this configuration will be described with reference to FIGS. 3 to 5 as follows.

Figure 3 is a perspective view showing a state in which the reinforcing bar transferred to the cutting area is seated on the blade module, Figure 4 is a perspective view showing a state in which the reinforcing bar is cut by the blade module as the press is lowered in Figure 3, and Figure 5 is a Figure 3 is a perspective view showing the cut reinforcing bar positioned on the blade module.

The reinforcing bar transferred to the cutting area 20 by the transfer unit 1 is seated on the upper surface of the blade module 100 in the cutting area 20. At this time, as can be seen in FIG. 3, the reinforcing bar extends from the transfer port 11 through the cutting area 20 to the upper surface of the blade module 100.

At this time, the press 30 descends to cut the rebar, and the press 30 descends with a width corresponding to the width of the space between the transfer port 11 and the blade module 100, that is, the width of the cutting area 20. work out.

When the press 30 falls along the cutting area 20, the reinforcing bar is pushed to the lower side of the cutting area 20 due to the pressure of the press 30 at the boundary between the cutting area 20 and the blade module 100. As a result, the reinforcing bar is cut and falls along the cutting surface 101 of the blade module 100.

In this process, the cut reinforcing bars (short reinforcing bars) are placed on the blade module 100 by the inertial force against the press 40 that moves relatively quickly, and the remaining reinforcing bars (long reinforcing bars) are placed on the blade module (100). ) It is possible to move downward along the cutting surface 101 and then be recovered by the worker through a space such as the discharge path 40 or the transfer port 11.

Figure 6 is a perspective view showing the schematic appearance of the blade module of the present invention, and Figure 7 is an exploded view showing the detailed configuration of the blade module of Figure 6.

As can be seen from FIGS. 6 and 7, the blade module 100 of the present invention is made of a roughly six-sided plate-shaped body, that is, the area of the cutting surface 101 is larger than the area of the side, and the cutting surface 101 ) may be attached to the lower side wall of the cutting area 20 in a state exposed toward the cutting area 20 or may form the lower side wall of the cutting area 20 itself.

Specifically, the blade module 100 includes a main body 110 including a slit 111 and an indentation groove 113, and a replacement block 120 that is stacked and seated so as to be replaceable in the indentation groove 113 of the main body 110. consist of.

First, the main body 110 refers to the mother body before the replacement block 120, which will be described later, is mounted, and includes a slit 111 and an indented groove 113, as mentioned above.

The slit 111 refers to a groove recessed along the longitudinal direction of the central area of the cut surface (top surface in FIG. 6), and the bottom surface of the slit 111 (bottom surface of the recessed area) has a constant groove along the longitudinal direction. A plurality of fastening holes 112 are formed therethrough at intervals.

This fastening hole 112 is a space where a fastener such as a bolt is fastened to mount the blade module 100 to the lower side wall of the cutting area 20. In other words, the blade module 100 is connected to the slit 111. It can be detachably mounted on the lower side wall of the cutting area 20 by engaging and disengaging fasteners coupled to it.

A known blade module has cutting surfaces of the same height formed on both surfaces around a slit, but the blade module 100 of the present invention has one of two sides of the cutting surface divided based on the slit 111. An indented groove 113 is formed to a certain depth in the entire or partial area of the surface.

Referring to FIG. 7, it can be seen that the indented groove 113 is not formed on the entire side of the cut surface 101, but in an area from a point a certain distance away from the slit 111 to the outer edge.

Like the slit 111, a plurality of first coupling holes 114 are penetrated into the bottom surface of the depression groove 113 at regular intervals along the longitudinal direction of the depression groove 113.

The replacement block 120 is mounted in the recessed groove 113 to have the same height as the cut surface 101 on which the recessed groove 113 is not formed. That is, the depression depth of the depression groove 113 and the height of the replacement block 120 are the same.

This replacement block 120 also has second coupling holes 121 penetrating at regular intervals along the longitudinal direction of the replacement block 120 so as to be coupled to the first coupling hole 114 of the indentation groove 113 via a fastener. As the fasteners are formed and fastened to the first and second coupling holes 114 and 121, the replacement block 120 can be mounted on the main body 110 of the blade module 100.

At this time, the 'longitudinal direction' described above can be understood as the direction in which the slit 111, the recessed groove 113, and the replacement block 120 all proceed in the same direction, that is, along the long side of the blade module 100.

According to this structure, the replacement block 120 can be coupled and separated from the main body 110 by coupling and disengaging fasteners, and this replacement block 120 is located at the area that preferentially contacts the reinforcing bar, that is, the blade module ( It is preferably located at the upper part of the cut surface 101 of 100), which can be said to be a part where wear occurs relatively easily due to contact with the reinforcing bar.

In the known blade module, the area where wear actually occurs can be said to be the area immediately below the cutting area 20, that is, the area (upper part) in contact with the reinforcement when the reinforcement is located in the cutting area 20, and the slit 111 Not only is there an inefficiency in having to replace the relatively wear-free part (lower part) when removing the fastener, but the fastener attached to the slit 111 is connected to the side wall more firmly than expected. Replacing the entire blade module itself was quite cumbersome.

In contrast, in the blade module 100 of the present invention, the replacement module 120 is detachably disposed in a part, but not the entirety, of the concentrated area where wear occurs, so that not only can the worn part be replaced relatively easily, but also the blade module. (100) It provides a characteristic that ensures the efficiency of replacing only the worn part without replacing the entire part.

Furthermore, the above-described replacement block 120 may be made of carbon alloy steel.

At this time, the main body 110 may be made of carbon alloy steel like the replacement block 120, or it may be made of a common metal material that has lower rigidity (or hardness) or is less expensive to purchase.

Figure 8 is a cross-sectional view showing the structure of a cushioning pad stacked between a recessed groove and a replacement block.

When the replacement block 120 is mounted on the first and second coupling holes 114,121 through fasteners in the depression groove 113, it may be attached more strongly than expected or may be unnecessarily attached to the main body 110 due to frequent friction and pressure with the reinforcing bar. The replacement block 120 may be attached, but in this case, there is a possibility that cracks may occur or be damaged in the recessed groove 113 or the joint area of the replacement block 120.

Accordingly, in order to prevent this problem, as can be seen from FIG. 8, a buffer pad 130 made of an elastic material may be stacked between the recessed groove 113 and the replacement block 120.

This buffer pad 130 reflects the thickness of the buffer pad 130 during the initial production of the replacement block 120 so that the height of the original cut surface 101 does not differ even when the replacement block 120 is finally mounted on this surface. It can be manufactured with a height as low as the thickness of the pad 130.

As mentioned earlier, the buffer pad 130 is made of a shock absorbing material or an elastic material and can absorb some of the shock applied to the replacement block 120. For example, the elastic body, which is an elastic material, may be made of rubber, silicon, etc., and may also be made of engineering plastic.

Engineering plastics may be made of at least one of polyurethane, thermoplastic polyurethane (TPU), and PVC. They provide shock absorption and anti-breakage functions and are widely used in various industrial and household goods fields.

At this time, polyurethane is a general term for polymer compounds joined by urethane bonds and includes spandex made of synthetic fibers, urethane-based synthetic rubber, etc., and has high transparency, abrasion resistance, and viscoelastic properties, thereby providing the elasticity of the cushioning pad and the function of preventing sticking. It can be improved.

As a result, the impact applied to the replacement block 120 can be smoothly absorbed while the replacement block 120 is coupled to the indentation groove 113, and the replacement block 120 is attached to the main body 110. By blocking this, it is possible to make the process of coupling or separating the replacement block 120 from the recessed groove 113 of the main body 110 more smoothly and safely.

Additionally, it is possible for a coating containing methyl methacrylate to be applied to the surface of the buffer pad 130 (i.e., the surface in contact with the bottom of the replacement block) and then cured to form the coating layer 140. .

Here, methyl methacrylate is a colorless/transparent liquid organic compound that polymerizes easily and can be used as a raw material for polyester resin. Since this methyl methacrylate is easily polymerized by light, heat, radiation, peroxide, etc., it can be conveniently applied as the main material for forming the coating layer 20.

According to the coating agent containing methyl methacrylate, it is possible to prevent the external force acting surface of the cushioning pad 130 made of an elastic material from being easily pressed or compressed. In other words, the durability and elasticity of the cushioning pad 130 are improved. can promote.

Furthermore, after the coating agent containing methyl methacrylate is applied, the cured coating layer 140 can also be applied to the surface of the replacement block 120, in a state containing methyl methacrylate. The coating layer 140 formed on the surface of the replacement block 120 does not provide perfect elasticity to bounce back due to friction and pressure with the reinforcing bar, but provides the minimum repulsion force and resulting rebound vector upon initial contact with the reinforcing bar. It can play a role in preventing the reinforcement from penetrating into the inside of the replacement block 120.

It is desirable to periodically coat the surface of the replacement block 120 with this coating layer 140 while cutting the rebar using the rebar cutting device 10 of the present invention.

Additionally, the coating agent of the coating layer 140 formed on the replacement block 120 may additionally include an enhancer including ethylene vinyl acetate copolymer (EVA).

Ethylene vinyl acetate copolymer (EVA) is a thermoplastic material used as the main raw material for hot melt adhesives. It provides weak viscosity to the surface of the replacement block 120 and prevents the rebar from digging into the inside of the replacement block 120. It plays a role in improving the provision of repulsion to force.

In addition, ethylene vinyl acetate copolymer (EVA) not only improves the durability of the coating layer 140 itself, but also improves the stability of the coating layer 140 itself, thereby preventing the coating layer 140 from easily falling off from the replacement block. It can also have other functions.

This enhancer is preferably included in a ratio of 5 to 15 parts by weight based on the total weight of the coating layer 140. If it is contained in a ratio lower than this ratio, the above-described improvement function will not be achieved, and if it is higher than this ratio, the viscosity of the coating layer 140 itself is unnecessary. This is because problems are increasing rapidly.

Figure 9 is a flowchart showing a process for manufacturing an enhancer included in the coating agent of the coating layer formed on the surface of the replacement block.

As an additional example, as can be seen from FIG. 9, the above-described enhancer can be manufactured through the first mixture preparation step (S210), the second mixture preparation step (S220), and the enhancer completion step (S230).

First, in the primary mixture preparation step (S210), based on the weight of the entire primary mixture, 75 to 90 parts by weight of ethylene vinyl acetate copolymer (EVA) and 10 to 25 parts by weight of polyvinyl acetate emulsion are added and incubated at 30 to 60°C for 15 minutes. This is a process of preparing a primary mixture by stirring for 35 minutes. Through this step, the ethylene vinyl acetate copolymer and polyvinyl acetate emulsion are uniformly mixed to prepare the primary mixture.

At this time, in order to increase the convenience and miscibility of the primary mixture, a pretreatment process is performed by first adding ethylene vinyl acetate copolymer (EVA) to the reactor and stirring at 20 to 40°C for 10 to 30 minutes before preparing the primary mixture. It may be possible.

As mentioned earlier, ethylene vinyl acetate copolymer (EVA) provides weak viscosity to the coating layer 140 and serves to complement the durability of the coating layer 140, and polyvinyl acetate has a softening point of 97 to 105°C and a softening point of 238°C. Since it has a lower softening point than the methyl methacrylate of the thermoplastic polyester resin series, which is 240°C, the softening point of the coating layer 140 is lowered, resulting in the advantage that curing of the coating layer 140 can proceed quickly even at low temperatures. can be provided.

Next, in the secondary mixture preparation step (S220), relative to the weight of the entire secondary mixture, 60 to 80 parts by weight of the primary mixture and 20 to 40 parts by weight of acrylic emulsion resin are added and stirred at 20 to 50 ° C. for 30 to 50 minutes. This is the process of manufacturing a secondary mixture.

In this step, the acrylic emulsion resin is at least one of normal butyl methacrylate, isobutyl methacrylate, lauryl methacrylate, stearyl methacrylate, and beta-hydroxybutyl methacrylate, and is used at a temperature of 30 to 40°C. It would be more preferable to mix for 30 to 40 minutes at 25 to 35 parts by weight relative to the total secondary mixture within the range.

The addition of this acrylic emulsion resin compensates for the low mechanical strength of ethylene vinyl acetate copolymer and polyvinyl acetate, and as a result provides the function of improving the mechanical strength of the coating layer 140.

Finally, in the enhancer completion step (S230), 80 to 95 parts by weight of the secondary mixture and 5 to 20 parts by weight of polytetrafluoroethylene are added relative to the total weight of the enhancer and stirred at 30 to 50 ° C. for 30 to 200 minutes. This is the process of completing the enhancer.

Here, polytetrafluoroethylene is an ethylene-based resin that possesses water and oil repellency and provides improved strength, heat resistance, water repellency, and oil repellency properties.

In summary, the enhancer prepared through this process provides properties that improve the adhesion, physical strength, and heat resistance of the coating layer 140.

Furthermore, in the above-described enhancer completion step (S230), it is possible to complete the enhancer by additionally including colloidal silica.

Specifically, based on the total weight of the enhancer, 80 to 90 parts by weight of the secondary mixture, 5 to 15 parts by weight of the polytetrafluoroethylene, and 1 to 15 parts by weight of the colloidal silicic acid were added, and the mixture was heated at 30 to 50° C. The enhancer can be completed by stirring for 200 minutes.

Here, colloidal silicic acid generally refers to silicon dioxide that exists in water as a hydrate. It is distributed in the enhancer and can help the coating layer 140 have a dense structure, thereby improving the wear resistance and mechanical properties of the coating layer 140. It provides properties that can maximize physical properties.

As explained so far, the configuration and operation of the rebar cutting device that ensures the convenience of replacing the blade according to the present invention has been expressed in the description and drawings, but this is only an example and the idea of the present invention is not reflected in the description and drawings. It is not limited to this, and of course, various changes and modifications are possible without departing from the technical spirit of the present invention.

1: Transfer unit 10: Rebar cutting device
11: transfer port 20: cutting area
30: press 40: discharge path
100: blade module 101: cutting surface
110: body 111: slit
112: Fastening hole 113: Indentation groove
114: first coupling hole 120: replacement block
121: second coupling hole 130: buffer pad
140: Coating layer

Claims (8)

A rebar cutting device that ensures the convenience of blade replacement,
A cutting area where the reinforcing bar transferred by the transfer unit is located, a press that descends into the cutting area to press the reinforcing bar, and a cutting surface, and the reinforcing bar is mounted on the lower side wall of the cutting area and transferred to the cutting area. In the rebar cutting device including a blade module that is seated and cuts the rebar by lowering the press, and a discharge path obliquely penetrating outward from the cutting area,
The blade module is,
A slit recessed along the longitudinal direction of the central area of the cut surface and through which a plurality of fastening holes are penetrated at regular intervals along the longitudinal direction, and a portion of one of the two sides of the cut surface divided based on the slit. a main body that is recessed at a predetermined depth in the region and includes recessed grooves through which a plurality of first coupling holes are penetrated at regular intervals along the longitudinal direction on the bottom surface;
It includes a replacement block seated and coupled to the recessed groove while the second coupling hole is penetrated at regular intervals along the longitudinal direction so as to be coupled to the first coupling hole via a fastener,
On the surface of the replacement block,
A coating containing methyl methacrylate is applied and then cured to form a coating layer.
The coating agent,
Based on the total weight of the coating layer, the enhancer is included in an amount of 5 to 15 parts by weight,
The enhancer is,
Based on the weight of the entire primary mixture, 75 to 90 parts by weight of ethylene vinyl acetate copolymer (EVA) and 10 to 25 parts by weight of polyvinyl acetate emulsion were added and stirred at 30 to 60°C for 15 to 35 minutes to prepare the primary mixture. A first mixture preparation step;
Based on the weight of the entire secondary mixture, 60 to 80 parts by weight of the primary mixture and 20 to 40 parts by weight of acrylic emulsion resin are added and stirred at 20 to 50 ° C. for 30 to 50 minutes to prepare a secondary mixture. manufacturing steps;
Based on the total weight of the enhancer, 80 to 90 parts by weight of the secondary mixture, 5 to 15 parts by weight of polytetrafluoroethylene, and 1 to 15 parts by weight of colloidal silicic acid were added and stirred at 30 to 50 ° C. for 30 to 200 minutes. A rebar cutting device, characterized in that it is manufactured through the step of completing the enhancer. According to clause 1,
The replacement block is,
A rebar cutting device, characterized in that it is made of carbon alloy steel. According to clause 1,
Between the recessed groove and the replacement block,
A rebar cutting device, characterized in that a buffer pad made of any one of an elastic material, polyurethane, thermoplastic polyurethane (TPU), and PVC is laminated. According to clause 3,
On the surface of the buffer pad,
A rebar cutting device, characterized in that a coating containing methyl methacrylate is applied and then cured to form a coating layer. delete delete delete delete