KR101130973B1 - Recycled protecting plate for underground cable and manufacturing method thereof - Google Patents

Abstract

PURPOSE: A recycle ground cable protective plate for transmission and distribution, and a manufacturing method thereof are provided to prevent damage due to excavation works and to shorten manufacturing costs by simplifying a shape of the recycle ground cable protective plate. CONSTITUTION: A ground cable protective plate is composed of a base layer and a film layer. The base layer uses a regenerated article of HDPE(High Density Polyethylene). The film layer is thermally bonded on the top of the base layer. Predetermined phrases are printed on the film layer. The color of the film layer is yellow and the color of the phrases is red. The ground cable protective plate comprises 5 fixed pin holes(13) and 6 drained grooves(14).

Description

Recycled Protecting Plate for Underground Cable and Manufacturing Method Thereof}

The present invention relates to a protective plate and a method of manufacturing the same for covering the cable for transmission and distribution embedded in the ground made of recycled material to protect the cable from damage, and more specifically, the transmission and distribution cable buried underground is damaged by excavation work It is to be installed on the top of the upper pipe in order to prevent that relates to a underground cable protective plate made by heat-bonding the PE layer to a high-density polystyrene (HDPE) recycled material and a manufacturing method thereof.

In recent years, as industrialization and informatization are accelerating, power consumption and information communication volume are rapidly increasing, and power supply or signal transmission for this is covered by cables between power sources and consumers located apart from each other, or between information providers and consumers. It is made by connecting with wires. These cables are generally installed in such a manner as to form hollow holes in the ground and to bury them in consideration of various reasons such as urban aesthetics.

Once the underground cable has been buried under the ground for a long time, unless there is special circumstances, the underground ship will inevitably be repaired or expanded, the paving of the road, the construction of other underground facilities such as gas or water pipes. You have to redig the furnace. At this time, because underground cable may be damaged by inadvertent drilling, underground cable cover is usually installed on the upper part of the buried cable.

Conventional underground cable protective plate is used a lot of the protective plate of the shape as disclosed in Patent Registration No. 10-0473328 or Utility Model Registration No. 20-0411615, in the case of such a conventional protective plate, the repair of the underground cable And forming a plurality of compensation ribs on the plate to protect the underground cable from the excavation equipment such as the excavator during the replacement for the replacement, and to produce a mold of a complex shape to form a plurality of protrusions for a firm contact with the ground It is a situation that is manufactured by the injection molding method of cooling after injection of the synthetic resin in the molten state.

When the protective plate is manufactured by the injection molding method as described above, it is possible to produce a protective plate of a complicated shape, but the manufacturing process is complicated, the manufacturing time takes a long time there is a problem that the manufacturing cost increases.

In addition, in the case of the protective plate, a plurality of protective plates are connected to each other and are installed in the ground above the underground cable. There was a problem that the underground cable could not be protected more securely than the used space.

In addition, the use of new HDPE (high density polyethylene) during injection molding is weak and expensive to impact, there is a disadvantage that can not use the regenerated, there is a problem that the quality of the product is different because there is no accurate quality standard when using the HDPE for reproduction.

The present invention for solving the above problems is installed in the upper part of the uppermost pipe to prevent damage to the transmission and distribution cables buried underground due to the excavation work, give strength to prevent damage due to the excavation work and the thermoplastic resin Recycled underground cable protective plate exclusively for transmission and distribution comprising a base layer using a high density polyethylene (HDPE) reclaimed product and a film layer printed with a predetermined text to be thermally bonded to the upper part of the base layer to recognize that the transmission and distribution cable is buried below It is a problem to be solved by the present invention to provide a manufacturing method of the underground cable to reduce the manufacturing cost by simplifying the product to shorten the manufacturing time and to enable the use of the regenerated HDPE.

The present invention is an underground cable protective plate installed in the upper part of the uppermost pipeline to prevent damage to the transmission and distribution cables buried underground due to the excavation work.

The underground cable protective plate has a strength to prevent damage due to the excavation operation and the base layer using a high-density polyethylene (HDPE) of the thermoplastic resin; It is composed of a film layer printed with a predetermined phrase that is thermally bonded to the upper portion of the base layer to recognize that the transmission and distribution cable is buried in the lower portion.

The material of the base layer should be recycled high-density polyethylene type 1 to 3 kinds of synthetic resin and should be recyclable. The manufacturing is made by injection or extrusion molding, and the film layer is double and the PE layer and the adhesive resin EVA It is composed of layers.

The performance of the underground cable shield plate has a tensile strength of 180kgf / cm2 or more, elongation of 220% or more, specific gravity 0.942 or more, ash content within 1%, hardness HDD 55 or more, impact test (IZOD) 11KJ / m2 or more, there is no abnormality in chemical resistance test However, the dissolution test is within 1 region.

The underground cable shield 1 has a size of length 1000mm x width 1000mm x thickness 5mm or length 1000mm x width 700mm x thickness 5mm for power distribution and length 1000mm x width 500mm x thickness 5mm for power delivery and the film layer The color of is yellow and the text printed on top of the film layer is red.

The underground cable shield plate has five fixing pin holes to be in close contact with the ground to prevent the underground cable shield plate 1 from moving, and six dripping holes to prevent water traps formed therein. to be.

The manufacturing method of the recycled underground cable shielding plate for power distribution is made by adding high-density polyethylene recycled raw materials to a hopper and supplying the raw materials introduced to the hopper to an extruder using a hopper feeder. Step 1; In the extruder, the raw material is heated by a band heater installed in the extruder to raise the resin processing temperature to 180 to 220 ° C., and the raw material heated by a screw in the extruder. A second step of supplying the die to the T-DIE horizontal molding machine while applying the pressure while advancing the same; Forming the base layer in the T-DIE horizontal molding machine; A fourth step of laminating the base layer formed by the T-DIE horizontal molding machine and the film layer supplied from the unwinding roller as pressure and heat of a horizontal lamination roller to produce a protective plate sheet; A fifth step in which the laminated cover plate is cooled while passing through a belt conveyor; A sixth step of manufacturing the protective plate by cutting the cooled protective plate sheet to a predetermined size; A seventh step of completing the underground cable protective plate by punching a fixing pin hole and a water dripping hole in the protective plate cut into a predetermined size; Comprising an eighth step of loading the completed underground cable shielding plate, the sixth step is the 6-1 step of recognizing the color of a certain portion with a sensor; 6-2 step of contacting the sheet with a roller in order to prevent being pushed to one side when cutting with a roller installed inside the cutting machine after a predetermined time after recognizing the letter color; A step 6-3 of cutting the protective plate sheet with a cutter while the cutting machine is advanced at a speed at which the protective plate sheet comes out; 6-4 step of unwinding the contact roller in close contact with the protective plate sheet after cutting; In order to adhere and cut the protective plate sheet again, it consists of a sixth to fifth step of reversing the cutting machine.

The above-described recycling underground cable protective plate for power distribution and its manufacturing method can solve the problem to be solved of the present invention.

The present invention can reduce the manufacturing time by reducing the shape so that the underground cable shield plate can be produced by extrusion molding with recycled HDPE, can reduce the manufacturing cost, and can prevent environmental pollution by using HDPE recycled, film layer It is effective to increase the strength by reinforcing the disadvantages that are weak to shock by thermal bonding.

1 is a detailed view of the underground cable protective plate according to the recycling underground cable protective plate and the manufacturing method of the present invention
Figure 2 is a cross-sectional view of the underground cable protective plate according to the recycling underground cable protective plate and the manufacturing method of the present invention only
Figure 3 is a continuous installation of underground cable protective plate installed on the underground cable of the present invention
4 is a flowchart illustrating a manufacturing method according to a distribution underground cable shield for exclusive use of the present invention and its manufacturing method.
Figure 5 is a manufacturing flow chart according to the distribution underground cable protective plate for transmission and distribution of the present invention and its manufacturing method

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS First, a detailed description of known functions and configurations incorporated herein will be omitted when it may make the subject matter of the present invention rather unclear.

In addition, the terms to be described later are defined in consideration of functions in the present invention, which may vary according to the intention or custom of the user or the operator, and the definition of the term "recycling underground cable protective plate for power distribution and its manufacturing method" according to the present invention. It should be made based on the contents throughout the specification to describe.

The underground cable shield plate (1) is installed in the upper part of the uppermost pipe to prevent damage to the transmission and distribution cables buried underground due to the excavation work, high-density polyethylene is a thermoplastic resin having a strength to prevent damage due to the excavation work A base layer 11 using a regenerated product of (HDPE); It is composed of a film layer 12 is printed with a predetermined phrase that is thermally bonded to the upper portion of the base layer 11 to recognize that the transmission and distribution cable is buried below.

The underground cable protective plate 1 has a size of length 1000mm x width 1000mm x thickness 5mm or length 1000mm x width 700mm x thickness 5mm for power distribution and length 1000mm x width 500mm x thickness 5mm for power delivery.

The color of the film layer 12 is yellow and the text printed on the film layer 12 is red.

The underground cable shield plate (1) has five fixing pin holes (13) to be in close contact with the ground to prevent the underground cable shield plate (1) from moving, and six dripping holes (14) to prevent water trapped on the top Is formed.

The material of the base layer 11 should be recycled high-density polyethylene 1 to 3 kinds of synthetic resin, and should be recyclable. The manufacturing is made by injection or extrusion molding, and the film layer 12 is double and PE layer. It consists of the 121 and the EVA layer 122 of the adhesive resin, the phrase is printed in red on the PE layer 121.

The performance of the underground cable protective plate (1) is characterized in that the tensile strength of 180kgf / cm2 or more, elongation 220% or more, specific gravity 0.942 or more, ash content within 1%, hardness HDD 55 or more, impact test (IZOD) 11KJ / m2 or more, chemical resistance test There is no abnormality, and it is preferable that the dissolution test is within 1 region.

In the manufacturing method of the underground cable shielding plate 1, high density polyethylene recycled raw materials are introduced into a hopper 21, and raw materials introduced into the hopper 21 are transferred to a hopper feeder 22. The first step is supplied to the extruder (23) by using; The raw material is heated in the extruder 23 with a band heater 231 installed in the extruder 23 to raise the resin processing temperature to 180 to 220 ° C., and the extruder 23. A second step of extruded under pressure while advancing the raw material heated by the screw 232 in the 23 and supplied to the T-DIE horizontal forming machine 24; Forming the base layer (11) in the T-DIE horizontal molding machine (24); The base layer 11 formed from the T-DIE horizontal molding machine 24 and the film layer 12 supplied from the unwinding roller 25 are laminated as pressure and heat of the horizontal lamination roller 26. A fourth step, which is a lamination step of manufacturing the protective plate sheet 1a; A fifth step in which the laminated protective plate sheet 1a is cooled while passing through the belt conveyor 27; A sixth step of manufacturing the protection plate 1b by cutting the cooled protection plate sheet 1a into a predetermined size with a cutting machine 28; A seventh step of completing the underground cable protection plate 1 by punching the fixing pin hole 13 and the water drain hole 14 with a punching machine 30 in the protection plate 1b cut into a predetermined size; Comprising the eighth step of loading the completed underground cable protective plate (1) on the loading pallet (31).

The sixth step includes a sixth step of recognizing a text color of a predetermined portion by the color recognition sensor 281; After the recognition of the color, after a certain time to close the protective plate sheet (1a) to the adhesion roller 282 in order to prevent being pushed to one side when cutting with the adhesion roller 282 installed inside the cutting machine (28). Step 6-2; Step 6-3 of cutting the protective plate sheet 1a with the cutter 283 while the cutting machine 28 advances at a speed at which the protective plate sheet 1a is released; A sixth to fourth step of unwinding the contact roller 282 in close contact with the protective plate sheet 1a after cutting; In order to close and cut the protective plate sheet (1a) is composed of a sixth to fifth step back to the cutting machine (28).

The underground cable shield 1 has a size of length 1000mm x width 1000mm x thickness 5mm and length 1000mm x width 700mm x thickness 5mm for power distribution and length 1000mm x width 500mm x thickness 5mm for power delivery.

The color of the film layer 12 is yellow, the text printed on the top of the film layer 12 is red, the text is printed in red on the PE layer 121.

The underground cable shield plate (1) has five fixing pin holes (13) to be in close contact with the ground to prevent the underground cable shield plate (1) from moving, and six dripping holes (14) to prevent water trapped on the top Is formed.

The fourth step of the horizontal lamination roller 26 is preferably heated to 130 ~ 170 ° C for thermal bonding, a method of thermal compression lamination by applying a pressure of 2 ~ 15kg / ㎠.

The material of the base layer 11 should be recycled high-density polyethylene 1 to 3 kinds of synthetic resin, and should be recyclable, and the manufacturing is made by injection or extrusion molding, and the film layer 12 is doubled and PE It consists of the layer 121 and EVA layer 122 which is adhesive resin.

The underground cable protective plate (1) has a tensile strength of 180kgf / cm2 or more, elongation of 220% or more, specific gravity 0.942 or more, ash content within 1%, hardness HDD 55 or more, impact test (IZOD) 11KJ / m2 or more, abnormal in chemical resistance test It is a manufacturing method of recycled underground cable shielding plate for transmission and distribution, characterized in that it is within 1 zone standard during dissolution test.

Hereinafter, the present invention will be described in detail by the accompanying drawings.

1 is a detailed view of the underground cable protective plate for recycling and distribution of the present invention and the underground cable protection plate according to the manufacturing method thereof, Figure 2 is a cross-sectional view of the underground cable protective plate according to the recycling underground cable protective plate for the transmission and distribution of the present invention, 3 is a continuous installation diagram of the underground cable protective plate only for transmission and distribution of the present invention and a manufacturing method thereof, Figure 4 is a flow chart of the manufacturing method according to the recycling underground cable protective plate and transmission method for exclusive use of the invention, Figure 5 Is a manufacturing flow chart according to the recycling underground cable protective plate for transmission and distribution of the present invention and its manufacturing method.

As shown in Fig. 1 and 2, the underground cable protection plate 1 is installed in the upper part of the uppermost pipe to prevent the transmission and distribution cables embedded in the underground from being damaged by the excavation work, which is damaged by the excavation work. A base layer 11 which gives strength to prevent the damage and uses a regenerated product of a high density polyethylene (HDPE) which is a thermoplastic resin; It is composed of a film layer 12 is printed with a predetermined phrase that is thermally bonded to the upper portion of the base layer 11 to recognize that the transmission and distribution cable is buried below.

The underground cable shield 1 has a size of length 1000mm x width 1000mm x thickness 5mm and length 1000mm x width 700mm x thickness 5mm for power distribution and length 1000mm x width 500mm x thickness 5mm for power delivery.

The color of the film layer 12, which is the upper surface of the underground cable protective plate 1, is prominent and the entire upper surface is yellow so that a caution warning is required. The text printed on the upper portion of the film layer 12, that is, the PE layer 121 is red.

The underground cable shield plate (1) has five fixing pin holes (13) to be in close contact with the ground to prevent the underground cable shield plate (1) from moving, and six dripping holes (14) to prevent water trapped on the top Is formed.

The material of the base layer 11 should be recycled high-density polyethylene 1 to 3 kinds of synthetic resin, and should be recyclable. The manufacturing is made by injection or extrusion molding, and the film layer 12 is double and PE layer. It consists of 121 and the EVA layer 122 which is adhesive resin.

The performance of the underground cable protective plate (1) is characterized in that the tensile strength of 180kgf / cm2 or more, elongation 220% or more, specific gravity 0.942 or more, ash content within 1%, hardness HDD 55 or more, impact test (IZOD) 11KJ / m2 or more, chemical resistance test It is desirable that there is no abnormality, and it is within 1 zone standard during the dissolution test, and that the low temperature impact test is not abnormal.

The tensile test and elongation test are in accordance with KS M 3006, specific gravity test is KS M 3016, chemical resistance test is KS M 3407, dissolution test is soil pollution process test method, and batch test is KS M ISO 3451-1. The hardness test is in accordance with KS M ISO 868 and the impact test is in accordance with KS M 3055.

Low temperature impact test is performed by cutting the protective plate into 500mm x 500mm, leaving it at -20 ± 1 ℃ for 5 hours, removing it from the chamber, and dropping it twice on the concrete floor at 1.5m height. The first falling shield is dropped at a right angle so that the edges touch the floor first, and the second drop falls parallel to the floor to check for cracks and deformations.

As shown in FIG. 3, the underground cable shield plate 1 is continuously installed in the upper part of the uppermost pipeline in order to prevent the transmission and distribution cables embedded in the underground from being damaged due to the excavation work, and is uniform in quality and torsional and cracked. There should be no defects.

In addition, the upper portion of the underground cable protection plate (1) should be marked in red to easily recognize the "dangerous high voltage cable" and contact information.

The underground cable protection plate (1) to prevent the movement by installing a separable fixing pin in the fixing pin hole 13 formed in the corners and the center so as to be in close contact with the ground as described above, and six Alternatively, more water drain holes 14 are formed to prevent water from accumulating on the upper portion of the ground cable protection plate 1 so that the ground under the same conditions as the ground to prevent partial settlement.

The fixing pin 15 is attached to a plurality of wings to be difficult to pull up and at least four wings are formed, the length of the fixing pin 15 is 15mm or more long enough to be embedded in the lower ground and PP or It is made of HDPE resin so that the underground cable is not damaged when the fixing pin 15 is stuck.

The underground cable protective plate (1) can shorten the manufacturing time and reduce the manufacturing cost by simplifying the shape so that it can also be produced by extrusion molding using the fixing pin without directly connecting the protective plate to each other, HDPE The use of recycled products can prevent environmental pollution, and also has the effect of enhancing strength by reinforcing the disadvantages that are weak to impact by thermally bonding the film layer.

As shown in Fig. 4 and 5, the method for manufacturing the underground cable protective plate 1 is a high-density polyethylene recycled raw material to the hopper (21), the raw material introduced into the hopper (21) A first step of feeding the extruder 23 using a hopper feeder 22; The raw material is heated in the extruder 23 with a band heater 231 installed in the extruder 23 to raise the resin processing temperature to 180 to 220 ° C., and the extruder 23. (2) step 2, wherein the raw material heated by the screw 232 in 23 is extruded under pressure while being fed to the T-DIE horizontal forming machine 24; Forming the base layer (11) in the T-DIE horizontal molding machine (24); The base layer 11 formed from the T-DIE horizontal molding machine 24 and the film layer 12 supplied from the unwinding roller 25 are laminated as pressure and heat of the horizontal lamination roller 26. A fourth step, which is a lamination step of manufacturing the protective plate sheet 1a; A fifth step in which the laminated protective plate sheet 1a is cooled while passing through the belt conveyor 27; A sixth step of manufacturing the protection plate 1b by cutting the cooled protection plate sheet 1a into a predetermined size with a cutting machine 28; A seventh step of completing the underground cable protection plate 1 by punching the fixing pin hole 13 and the water drain hole 14 with a punching machine 30 in the protection plate 1b cut into a predetermined size; Comprising the eighth step of loading the completed underground cable protective plate (1) on the loading pallet (31).

The fourth step of the horizontal lamination roller 26 is preferably heated to 130 ~ 170 ° C for thermal bonding, a method of thermal compression lamination by applying a pressure of 2 ~ 15kg / ㎠.

The sixth step includes a sixth step of recognizing a text color of a predetermined portion by the color recognition sensor 281; After the recognition of the color, after a certain time to close the protective plate sheet (1a) to the adhesion roller 282 in order to prevent being pushed to one side when cutting with the adhesion roller 282 installed inside the cutting machine (28). Step 6-2; Step 6-3 of cutting the protective plate sheet 1a with the cutter 283 while the cutting machine 28 advances at a speed at which the protective plate sheet 1a is released; A sixth to fourth step of unwinding the contact roller 282 in close contact with the protective plate sheet 1a after cutting; In order to close and cut the protective plate sheet (1a) is composed of a sixth to fifth step back to the cutting machine (28).

Hereinafter, the steps of manufacturing the underground cable protective plate 1 will be described in detail.

In the first step of feeding the raw material into the hopper and feeding to the extruder, recycled high density polyethylene (HDPE), which is a raw material of the base layer, is introduced into the hopper 21, and the raw material introduced into the hopper 21 is hopper. The feeder (Hopper Feeder) (22) is used to feed the extruder (Extruder) (23).

The hopper (21) should be able to supply a constant raw material to the extruder (23). The raw materials used in the extruder 23 have a low specific gravity and most of them have poor powder fluidity. In this case, a bridge is formed in the hopper 21, and the generation of powder pressure is insufficient, so that the extrusion amount is reduced or fluctuated easily. For this purpose, there is a forced supply method using a compactor. Therefore, care should be taken to avoid the bridge phenomenon in the hopper during hopper manufacture. Hopper dryers may be used for hygroscopic materials. The forced feeding method also helps to increase the extrusion amount. In addition, the hopper 21 serves as a cylinder of the screw of the extruder 23 and is located above the barrel which becomes a body, and heat may be transferred from the barrel. In this case, the resin may stick to the inside of the hopper 21 or the resin may be entangled with each other. In order to prevent this, the hopper 21 should be installed in a structure in which a heat shield is made from a barrel.

The hopper feeder 22 is a portion where the raw material is supplied from the hopper 21, and is in contact with the barrel of the extruder 23, so that the elevated temperature of the barrel is always conducted. It is done. Therefore, care must be taken to prevent the resin from sticking to the inner surface of the hopper feeder 22 as in the hopper 21. In order to prevent the resin from sticking to the outer surface of the hopper feeder (Hopper Feeder) 22 may be a jacket type to circulate the cooling water.

Depending on the shape of the hopper feeder 22, the supply of raw materials may change. In order to increase the extrusion amount, a groove may be processed in the inner surface of the hopper feeder 22.

The second step of heating, mixing and dispersing the raw material in the extruder and then supplying the press to the molding machine is performed by transferring the raw material from the extruder 23 to a band heater 231 installed in the extruder 23. Heated to raise the resin processing temperature to 170 ~ 200 ℃, extrude the molten resin by applying pressure while advancing the raw material heated by the screw (232) in the extruder (23) tee die horizontal molding machine Supply to (24).

The drive motor of the extruder 23 is a very important factor in the extrusion capacity. If the power of the motor is insufficient, the machine may not be able to handle the output and the machine may stop, or the production quality may be poor. Too much power is also inefficient because of the high energy use and production costs. Therefore, it is important to select the proper motor power. The power of the motor depends on the raw materials used, the processing conditions, the production volume, the number of revolutions and the torque of the screw.

The resin, which is a raw material, acts as a cylinder of the screw of the extruder 23 in the hopper 21 and is introduced into a barrel that becomes a body, and then is extruded into the tee die horizontal molding machine 24. The time is about 20-30 seconds. During this time, there is an artificial heat supply from the outside to allow the resin to rise to the processing temperature and melt. To this end, heat is supplied to the outer surface of the barrel using a heater. Common resins supply heat from the outside. In some resin processing, since the temperature rises continuously due to internal heat generation, a heating / cooling system may be required in which the cooling may be performed simultaneously with the heating outside the barrel. Band heaters and aluminum cast heaters (Al-Cast Heaters) are mainly used. When high heat is required, special heaters such as brass or ceramic heaters may be used.

A thermo couple is installed in the barrel of the extruder 23 to measure the temperature to control the temperature in the barrel.

In the third step of forming the base layer 1 in the T-DIE molding machine, the molten resin extruded from the extruder 23 is transferred to the T-DIE horizontal molding machine 24. This step is supplied and molded into a film while passing through a die.

The fourth step of manufacturing the protective plate sheet 1a by laminating the base layer and the film layer in a horizontal lamination roller is the base layer 11 and the unwinding roller formed from the T-DIE horizontal molding machine 24. The film of the film layer 11 supplied from (25) is laminated with the pressure and heat of the horizontal lamination roller 26 to produce the protective plate sheet 1a, and the horizontal lamination roller 26 has three It is composed of a roller (may be composed of four or more rollers in some cases) is heated to 130 ~ 170 ℃, the pressure of the horizontal lamination roller 26 is added to the heat compression lamination by 2 ~ 15kg / ㎠ .

The film layer 11 supplied from the unwinding roller 25 is manufactured by forming an inflation 2way molding machine in the third step through the first and second steps described above, and printing the upper part in the fourth step. The fifth step can be produced by winding the winding roller.

The fifth step of cooling the protective plate sheet (1a) in the belt conveyor is cooled by being transferred from the first belt conveyor 27 because the laminated protective plate sheet (1a) is a high temperature at a temperature of 100 ℃ or more and the first belt conveyor The feed rate in (27) is slowly fed at about 0.2 to 1.0 m / min.

The first belt conveyor 27 preferably has a variable feeding speed of the belt in order to adjust the cooling time, and adjusts the rotational speed of the drum for rotating the belt, that is, the rotational speed of the motor for driving the drum. It is desirable to adjust the speed of the belt.

In the fifth step of cooling the protective plate sheet 1a, a cooling roller through which cold water passes through the roller before the belt conveyor may be cooled and then cooled while being transferred from the first belt conveyor 27. It also has the advantage of increasing production.

The sixth step of manufacturing the protective plate by cutting the protective plate sheet to a predetermined size includes a sixth step of recognizing a color of a certain portion of the protective plate as the color recognition sensor 281; After the recognition of the color, after a certain time to close the protective plate sheet (1a) to the adhesion roller 282 in order to prevent being pushed to one side when cutting with the adhesion roller 282 installed inside the cutting machine (28). Step 6-2; Step 6-3 of cutting the protective plate sheet 1a with the cutter 283 while the cutting machine 28 advances at a speed at which the protective plate sheet 1a is released; A sixth to fourth step of unwinding the contact roller 282 in close contact with the protective plate sheet 1a after cutting; In order to contact and cut the protective plate sheet (1a) again, the cutting machine 28 is composed of steps 6-5.

Step 6-1 of recognizing a text color of a predetermined portion with the color recognition sensor 281 is a red special high pressure displayed on the protective plate 1b by the color recognition sensor 281 installed at the distal end of the first belt conveyor. Recognizing the position of the letter of the cable and transmits to the control unit of the cutting machine 28 to receive the signal transmitted from the control unit to perform the next step.

In other words, after recognizing the position of the letter of the red high-voltage cable in step 6-2, the protective plate to prevent being pushed to one side when cutting with the contact roller 282 installed inside the cutting machine 28 after a predetermined time The control unit issues a command to bring the sheet 1a into close contact with the contact roller 282, thereby bringing the protective plate sheet 1a into close contact with the contact roller 282, and forwards at the same speed as the speed of the first belt conveyor 27. Proceed.

Step 6-3 is a step of cutting the protective plate sheet 1a with the cutter 283 while the cutting machine 28 moves backward at the speed at which the protective plate sheet 1a comes out. There is a fixed blade that is cut with a rotary saw.

Step 6-4 is a step in which a protective plate of a predetermined size is manufactured one by one by releasing the contact of the protective plate sheet 1a with the contact roller 282 in order to prevent it from being pushed to one side during cutting.

Step 6-5 is a step of backing the cutting machine 28 back to close and cut the protective plate sheet (1a).

The cutting machine 28 may move forward in the direction of travel of the first belt conveyor 27 or may reverse in the direction of travel of the first belt conveyor 27 and may vary in speed to cut When reversing, you can reverse quickly.

The cut plate 1b is cut off on the second belt conveyor 29 to be in a punching operation standby state.

In the seventh step, the underground cable protective plate 1 is formed by forming five fixing pin holes 13 and six or more dripping holes 14 by pressing or punching machine 30 in the protective plate 1b cut into a predetermined size. This is the stage to complete.

As shown in FIG. 1, the fixing pin holes 13 are preferably formed at five edges and centers of four sides with a diameter of 30 mm, and the water drain holes 14 are six or more with a diameter of 40 mm. It is preferable to form a.

In the eighth step, the completed underground cable protective plate 1 is loaded on a loading pallet 31 to load a predetermined quantity and palletize.

The present invention can reduce the manufacturing time by reducing the shape so that the underground cable shield plate can be produced by extrusion molding with recycled HDPE, can reduce the manufacturing cost, and can prevent environmental pollution by using HDPE recycled, film layer It is effective to increase the strength by reinforcing the disadvantages that are weak to shock by thermal bonding.

A: underground cable
1: underground cable protective plate 1a: protective plate sheet
1b: protective plate 11: base layer
12 film layer 13 fixing pin hole
14: water drain hole 15: fixing pin
21: Hopper
22: hopper feeder 23: extruder
231: band heater 232: screw
24: Tee die horizontal molding machine 25: unwinding roller
26: horizontal lamination roller 27: the first belt conveyor
28: cutting machine 281: color recognition sensor
282: contact roller 283: cutter
284: horizontal guide roller 29: second belt conveyor
30: punching machine 31: loading pallet

Claims (9)

In the underground cable protection plate (1) which is laid on the uppermost pipeline to prevent damage to the transmission and distribution cables buried underground by excavation work,
The underground cable protective plate (1) has a base layer (11) having a strength of preventing damage due to excavation work and using a regenerated product of a high density polyethylene (HDPE) thermoplastic resin;
It is composed of a film layer (12) printed a predetermined phrase that is thermally bonded to the top of the base layer 11 to recognize that the transmission and distribution cable is buried in the bottom,
The underground cable shield 1 has a size of length 1000mm x width 1000mm x thickness 5mm or length 1000mm x width 700mm x thickness 5mm for power distribution, and length 1000mm x width 500mm x thickness 5mm for power delivery,
The color of the film layer 12 is yellow and the text printed on the top of the film layer 12 is red,
The underground cable shield plate (1) has five fixing pin holes (13) to be in close contact with the ground to prevent the underground cable shield plate (1) from moving, and six or more dripping holes (14) to prevent the water trapped on the top ) Is formed,
The film layer (12) is double, PE layer 121 and the recycled underground cable protective plate for transmission and distribution, characterized in that composed of an adhesive resin EVA layer (122).
The method of claim 1,
The material of the base layer 11 is recycled high density polyethylene 1 ~ 3 kinds of synthetic resin should be recyclable, and the manufacture is recycled underground cable protective plate for transmission and distribution, characterized in that manufactured by injection or extrusion method.
delete The method of claim 1
The performance of the underground cable protective plate (1) is tensile strength 180kgf / cm ² or more, elongation 220% or more, specific gravity 0.942 or more, ash content within 1%, hardness HDD 55 or more, impact test (IZOD) 11KJ / m ² or more, chemical resistance No damage to the test, recyclable underground cable shield for transmission and distribution, characterized in that within the 1 area standard during dissolution test.
In order to prevent damages caused by excavation work, transmission and distribution cables buried underground are installed at the top of the top line, and use regenerated products of high-density polyethylene (HDPE), a thermoplastic resin, which has strength to prevent damage due to excavation work. Of the underground cable protective plate (1) consisting of a film layer (12) printed on the base layer (11) and the upper layer of the base layer (11) and printed with a predetermined phrase for recognizing that a transmission and distribution cable is buried under the base layer (11). In the manufacturing method,
In the manufacturing method of the underground cable shielding plate (1), high-density polyethylene recycled raw materials are introduced into a hopper (21), and the raw materials introduced into the hopper (21) using a hopper feeder (22). And the first step is supplied to the extruder (23);
The raw material is heated in the extruder 23 with a band heater 231 installed in the extruder 23 to raise the resin processing temperature to 180 to 220 ° C., and the extruder 23. A second step of extruded under pressure while advancing the raw material heated by the screw 232 in the 23 and supplied to the T-DIE horizontal forming machine 24;
Forming the base layer (11) in the T-DIE horizontal molding machine (24);
The base layer 11 formed from the T-DIE horizontal molding machine 24 and the film layer 12 supplied from the unwinding roller 25 are laminated as pressure and heat of the horizontal lamination roller 26. A fourth step, which is a lamination step of manufacturing the protective plate sheet 1a;
A fifth step in which the laminated protective plate sheet 1a is cooled while passing through the belt conveyor 27;
A sixth step of manufacturing the protection plate 1b by cutting the cooled protection plate sheet 1a into a predetermined size with a cutting machine 28;
A seventh step of completing the underground cable protection plate 1 by punching the fixing pin hole 13 and the water drain hole 14 with a punching machine 30 in the protection plate 1b cut into a predetermined size;
Comprising the eighth step of loading the completed underground cable protection plate (1) on the loading pallet 31,
The sixth step includes a sixth step of recognizing a text color of a predetermined portion by the color recognition sensor 281;
After the recognition of the color, after a certain time to close the protective plate sheet (1a) to the adhesion roller 282 in order to prevent being pushed to one side when cutting with the adhesion roller 282 installed inside the cutting machine (28). Step 6-2;
Step 6-3 of cutting the protective plate sheet 1a with the cutter 283 while the cutting machine 28 advances at a speed at which the protective plate sheet 1a is released;
A sixth to fourth step of unwinding the contact roller 282 in close contact with the protective plate sheet 1a after cutting;
6 to 5 steps of reversing the cutting machine 28 for the next cutting,
The underground cable shield 1 has a size of length 1000mm x width 1000mm x thickness 5mm or length 1000mm x width 700mm x thickness 5mm for power distribution and length 1000mm x width 500mm x thickness 5mm for power delivery,
The color of the film layer 12 is yellow and the text printed on the top of the film layer 12 is red,
The underground cable shield plate (1) has five fixing pin holes (13) to be in close contact with the ground to prevent the underground cable shield plate (1) from moving, and six or more dripping holes (14) to prevent the water trapped on the top ) Is a method for manufacturing a recycled underground cable shield for power distribution.
6. The method of claim 5,
The fourth step of the horizontal lamination roller 26 is heated to 130 ~ 170 ℃ for thermal bonding, and the pressure of 2 ~ 15kg / ㎠ to heat compression laminated manufacturing method of the recycled underground cable protective plate for power distribution Way.
6. The method of claim 5,
The material of the base layer 11 should be recycled high-density polyethylene 1 to 3 kinds of synthetic resin and must be recyclable, and the manufacturing method of the recycled underground cable protective plate for power distribution is characterized in that it is manufactured by injection or extrusion molding. .
6. The method of claim 5,
The film layer (12) is a double, PE layer 121 and the manufacturing method of the recycled underground cable protective plate for power distribution, characterized in that consisting of an EVA layer 122 of an adhesive resin.
6. The method of claim 5,
The underground cable protective plate (1) has a tensile strength of 180kgf / cm ² or more, elongation 220% or more, specific gravity 0.942 or more, ash content within 1%, hardness HDD 55 or more, impact test (IZOD) 11KJ / m ² or more, chemical resistance test No abnormalities, the method of manufacturing a recycled underground cable shield for transmission and distribution, characterized in that within the 1 area standard during the dissolution test.

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