KR100894333B1 - Production Method and Structure for Recycled Plastic Block Releasing Thermal Expansion Pressure - Google Patents

Abstract

The present invention relates to a block recycled waste plastic and a method for manufacturing the same, in particular, in the manufacturing of the block 10 from the waste synthetic resin, the cavity 11 inside the block so as to compensate for the disadvantages of large thermal expansion of the waste synthetic resin By providing a block to absorb the thermal expansion of the block 10 itself, and by forming an elastic wing 12 on the outer circumferential surface of the block to absorb the pressure generated between adjacent blocks, by providing a block and a method of manufacturing the same, The thermal expansion pressure is suitable for outdoor use without protruding the installed block construction surface by minimizing thermal expansion and absorbing expansion force as well as reducing production cost and securing price competitiveness by recycling waste resources. It relates to a waste plastic recycling block and a method for producing the same.

Sidewalk Block, Waste Synthetic Resin, Waste Plastic, Recycling, Thermal Expansion

Description

Waste plastic recycling block absorbing thermal expansion pressure and its manufacturing method {Production Method and Structure for Recycled Plastic Block Releasing Thermal Expansion Pressure}

1 is a cross-sectional view showing a waste plastic recycling block according to the present invention

Figure 2 is a partially enlarged cross-sectional view showing an additional configuration in the waste plastic recycling block according to the present invention

*** Explanation of symbols for the main parts of the drawing ***

10: block

11: joint

12: elastic wing

20: lower body

25, 35: joint protrusion

26, 36: joint groove

27: fusion protrusion

30: tops

The present invention relates to a recycling block made of waste plastic as a material and a method for manufacturing the same, and more particularly, among agricultural wastes generated in large quantities from various industrial wastes, including general household waste, in particular, which is not recycled properly. Recycling block is composed by using encapsulant made of vinyl or composite material used in homes, forming cavity in the block and forming elastic wing on the outer circumference of the block to minimize deformation of block itself by thermal expansion. In addition to being able to absorb the pressure generated between adjacent blocks, waste plastic recycling absorbs thermal expansion pressure to prevent the block's construction surface from being deformed by changes in external temperature such as seasonal changes. A block and a method of manufacturing the same.

In general, various wastes including household waste and industrial waste contain a considerable amount of recyclable materials. Among the recycled materials, various types of recycling methods have already been proposed and utilized. Waste synthetic resins are recycled into various recycled materials in daily life and industrial sites. However, in the case of agricultural waste vinyl, it is not easy to recycle because it contains a large amount of foreign substances such as soil and sand.

On the other hand, as a method of recycling waste vinyl for agriculture, an invention relating to a multi-elastic block using thermoplastic elastomer and waste vinyl for agriculture is proposed in Korean Patent Publication No. 10-0689342 (August 03, 2007). In the case of a multi-elastic block, it is possible to actively recycle agricultural vinyl, which is not easy to recycle, is resistant to breakage and absorbs shock, thereby improving the convenience of pedestrians.

However, in the case of the multi-elastic block recycled waste vinyl proposed in the related art, unlike the block made of cement or clay, the coefficient of thermal expansion of the material is large, so that the pressure between adjacent blocks increases due to summer expansion. As the construction surface is uneven and some blocks are raised to protrude to the construction surface, which makes the block construction surface uneven, it could be useful in places where the temperature change is small, such as the room, but the temperature variation such as the change of season In large outdoor areas, its use was limited and was not utilized.

On the other hand, in order to compensate for the shortcomings of the conventional synthetic resin block, including the multi-elastic block, in order to compensate for the thermal expansion during the installation of the synthetic resin block, even if the space between the blocks and installed at random intervals, in this case, the solution of the fundamental problem Not only that, but also requires a careful attention during installation, the work is inconvenient and caused another problem, such as irregular intervals or excessively large intervals depending on the skill of the contractors.

An object of the present invention for solving the problems as described above, by producing a block as a waste synthetic resin, but by providing a block configuration and a method of manufacturing the block that can compensate for the disadvantages of the waste synthetic resin having a large thermal expansion, According to the object of the present invention, it is possible to install a synthetic resin block outdoors by minimizing thermal expansion due to temperature change and reducing production cost and securing price competitiveness according to the present invention. In addition to forming a block and a method of manufacturing the same to form an elastic wing on the outer peripheral surface of the block to absorb the pressure generated between adjacent blocks.

The waste plastic recycling block and the manufacturing method for absorbing thermal expansion pressure according to the present invention for achieving the above object, the configuration of the block formed by forming a cavity inside and integrally formed elastic wings on the outer peripheral surface, A method of manufacturing a method of forming a block formed with the cavity and elastic wings by melting the waste synthetic resin crushed into a predetermined size to form a block, or by forming a block body and a top plate of the block, respectively. With reference to the accompanying drawings, it looks at in detail the configuration of the recycling block and its manufacturing method characterized by the present invention.

First, looking at the configuration of the waste plastic recycling block (hereinafter referred to as "recycling block") that absorbs the thermal expansion pressure according to the present invention, the recycling block 10 according to the present invention is a block 10 by melting and molding the waste synthetic resin ) To form a cavity 11 inside the block 10, and also to form an elastic wing 12 on the outer circumferential surface of the block 10.

Looking at the configuration of the cavity 11, the hollow zone (hollow zone, hollow zone) in more detail, the hollow portion 11 is a hollow space inside the block 10 is radiant heat and air transmitted directly from the outside to the upper layer of the block 10 It is possible to minimize the thermal expansion of the entire block 10 by blocking the transfer of heat to the lower layer of the block 10, to absorb the increased volume due to thermal expansion, and to be exposed to the outside to change the temperature relatively Absorbs or releases heat to the upper upper portion to maintain a constant temperature, while the block 10 is formed by cooling water circulating into the slide mold inserted to form the cavity 11 during the manufacture of the block 10. In addition to reducing the work time by promoting the cooling and the cooling temperature and cooling time difference of the epidermis and the core of the block 10 can be prevented deformation of the block due to the difference in cooling conditions.

In addition, it can be expected to reduce the raw material of the block 10 according to the formation of the cavity 11 and to reduce the manufacturing cost, and the weight is reduced along with the volume, thereby simplifying transportation and construction.

The cavity 11 has a volume of 30 to 70% with respect to the total volume of the block 10 (the volume of the block including the cavity), and the cavity 11 is formed by dividing into a plurality of vertical portions. In addition, the plurality of vertical parts, which are block forming parts except the cavity part 11, are preferably formed to have a thickness of 1 to 30 mm, respectively, and the volume of the cavity part 11 is 30% of the total volume of the block 10. If less than or equal to the thickness of each vertical portion is more than 30mm, the effect of forming the cavity 11 is insignificant, and the deformation of the block 10 is likely to occur during the cooling process, and the volume occupied by the cavity 11 is 70% or more. Or if the thickness of each vertical portion is less than 1 mm, it does not have sufficient strength.

Looking at the configuration of the elastic wing 12 in more detail, the elastic wing 12 serves to prevent the problem that the construction surface of the block rises by absorbing the thermal expansion pressure generated between the blocks 10 constructed. In addition, the construction of the block 10 serves to maintain a constant interval between the blocks, the elastic wing 12 is formed integrally on the outer peripheral surface of the block 10 during the molding of the block 10, the longitudinal section of the Formed into a curved "C" or "S" shape or other spring effect shape to facilitate absorption of the expansion force between the blocks 10 constructed.

In addition, the elastic wings 12 are formed to absorb the stress due to the expansion of the block 10 and to prevent the gap from relaxing due to contraction, and have a protrusion width of 1 to 10 mm from one side of the block 10. When the protrusion width of the elastic wing 12 is 1 mm or less, the expansion force absorbing function is weak, and there is no space keeping effect when the block 10 is laid, and the protrusion of the elastic wing 12 exceeds 10 mm. This is because the space between the blocks 10 is large when the installation of (10) is not successful.

On the other hand, the recycling block 10 according to the present invention having the configuration as described above integrally eject the entire block 10 in which the cavity 11 and the elastic wing 12 is formed, or lower the block 10 The body 20 and the upper plate 30 can be formed separately and then integrated, bar block 10 is formed by separating the lower body 20 and the upper plate 30 as shown in FIG. Trapezoidal joining protrusions 25 and joining grooves 26 are continuously formed on the upper surface of the lower body 20, and the joining protrusions 25 and joining recesses of the lower body 20 are formed on the upper plate 30. The other joining protrusions 35 and the joining recesses 36 corresponding to 26 are formed so that the lower body 20 and the upper plate 30 can be firmly assembled. Also, as shown in FIG. 2, a fusion protrusion 27 embedded in the upper plate 30 is further formed on the upper side of the bonding protrusion 25 formed on the lower body 20, thereby lowering the body 20 and the lower body 20. The top plate 30 may be more firmly integrated. At this time, the height of the fusion protrusions 27 is in the range of 10 to 90% of the thickness of the upper plate 30, the thickness of the fusion protrusions 27 is the sum of the total thickness of the fusion protrusions 27 is 10 ~ 10 of the length of the upper plate 30 The 90% range is preferable, but less than 10% or more than 90% is difficult to expect the effect of the fusion projections (27).

Hereinafter, a method for manufacturing a recycling block according to the present invention will be described with reference to the drawings. The method will be described below by melting a plastic and a process of molding a block in which a cavity and an elastic wing are formed from the molten waste plastic.

Melting process of the present invention is a step of melting the waste plastic or agricultural wastes generated at home or industrial sites at 120 ~ 350 ℃ using a conventional melter, the agricultural waste vinyl mainly composed of low density polyethylene and high density polyethylene It is preferable to use a conventional crusher to crush it into 50 to 200 mm in width and 100 to 500 mm in length to melt the waste resin, and the waste resin is a packaging material mainly containing polypropylene, polystyrene, polyvinyl chloride, polyethylene terephthalate, nylon, urethane, etc. It is preferable to melt one or two or more kinds of waste resins used as encapsulation materials and containers, pulverize them into chips of 0.1 to 15 mm in size, and then melt them.

On the other hand, 30 to 70% by weight of sand or stone powder or wood powder having a diameter of 0.1 to 15 mm as a reinforcing material with respect to 30 to 70% by weight of waste plastic raw materials crushed or pulverized as described above, or 1 to 50 mm of glass fiber or carbon fiber or 30 to 70% by weight of polymer fibers may be further mixed.

Looking at the molding process, the molding process is a process of forming the block 10 from the molten waste plastic raw material using a conventional injection or extrusion molding method, the molten material is injected into the molding 120 ~ In case of intermittent work, molding should be maintained at 120 ℃ or higher, which is higher than the melting temperature of the material, even after cooling from the outside.

In the molding process, the hollow part 11 is formed inside the block 10, and the elastic wing 12 is formed on the outer circumferential surface of the block 10. The hollow part 11 is a completed block ( 10) minimizes the thermal expansion, absorbs the volume of the increased volume due to thermal expansion, and during the molding process of the block 10 by the cooling water circulated into the slide mold inserted to form the cavity 11 The working time can be reduced by promoting cooling, and by preventing the deformation of the block by reducing the cooling temperature and cooling time difference between the epidermis and the core of the block 10, and preventing the deformation of the block elastic wings formed on the outer peripheral surface of the block The deformation of can also be prevented.

And the cavity 11 is to have a volume of 30 to 70% of the total volume of the block 10, the cavity 11 is formed by partitioning into a plurality of vertical parts, except the cavity 11 It is preferable to form a plurality of vertical portions, which are block molding portions, to have a thickness of 1 to 30 mm, respectively.

On the other hand, the slider for forming the cavity 11 is produced perpendicular to the injection direction or compression direction of the molding to remove the slider from the mold after the material is cooled after the material is cooled to remove the molding from the mold, The cavity 11 is introduced into the cavity forming slider by forming a cross-section in a rectangle or a circle to prevent deformation of the molded product after cooling, so that the width and the width of the cross section are each 20 mm or more and a circle having a diameter of 20 mm or more. The cooling fluid is facilitated by increasing the flow rate of the cooling fluid.

In addition, the elastic wing 12 absorbs thermal expansion pressure generated between the constructed blocks 10 to prevent a problem that the construction surface of the block rises, and maintains a constant interval between blocks when laying the blocks 10. The elastic wings 12 are integrally formed on the outer circumferential surface of the block 10 during the molding of the block 10, but are formed in parallel to the cavity 11 in the entire side of the block, and the longitudinal section thereof is Formed into a curved "C" or "S" or other spring effect shape to facilitate absorption of the expansion force between the blocks 10 constructed, 1 ~ 10mm from one side of the block 10 It is preferable to form so as to have a protrusion width of.

On the other hand, the molding process is injection molding the block 10 integrally, or after molding the lower body 20 and the upper plate 30, respectively, by binding to integrate the block 10, or lower body 20 or the upper plate ( After forming any one of the 30) and then inserting the molded lower body 20 or the upper plate 30 into a mold, the remaining portion can be injected or extruded to form a block 10, the following block ( 10) will be described in more detail the case of forming and then integrating the lower body 20 and the upper plate 30.

First, when the lower body 20 and the upper plate 30 are respectively molded and assembled to form the block 10, the lower body 20 and the upper plate 30 are respectively processed by the respective molten material in an independent process. Molding in each mold, and the trapezoidal joining projection 25 and the joining groove 26 on the upper surface of the lower body 20 so that the lower body 20 and the upper plate 30 can be bonded continuously, The other joining protrusion 35 and the joining recess 36 corresponding to the joining protrusion 25 and the joining recess 26 are formed on the bottom surface of the upper plate 30 to form the lower body 20 and the upper plate of the block 10. Assemble so that (30) does not peel.

In the case of forming the block 10 by first molding the upper plate 30 and then inserting and injecting the upper plate 30 into the lower body 20 mold, the lower plate 30 is joined with the trapezoidal joining protrusion 35. The upper plate 30 having the grooves 36 formed thereon is first formed, and the upper plate 30 is inserted into the lower body 20 forming mold, and then a molten material is added to the bonding protrusions 35 and the joining grooves of the upper plate 30. Block 10 is formed while the other joining protrusion 25 and the joining recess 26 corresponding to the 36 is formed in the lower body 20, in which case the lower body 20 is thicker than the upper plate 30. As the bonding surface of the upper plate 30 is hot-fused to the lower body 20 by the heat capacity of the material, the bonding strength of the lower body 20 and the upper plate 30 is excellent and the molding is easy.

Hereinafter, a case in which the lower body 20 is first formed and then the lower body 20 is inserted into the mold of the upper plate 30 and injected is formed to form the block 10. The lower body 20 having the joining grooves 26 formed thereon is first formed, and the lower body 20 is inserted into the upper plate 30 forming mold, and then a molten material is added thereto, thereby joining the joining protrusions of the lower body 20 ( 25) and other joining protrusions 35 and joining recesses 36 corresponding to the joining recesses 26 are formed on the upper plate 30 so that the block 10 is formed, wherein the material is lower than the lower body 20. In order to fuse the surface of the lower body 20 with the heat capacity of the upper plate 30 which is significantly smaller in weight, the bonding area between the lower body 20 and the upper plate 30 should be maximized, and thus the bonding formed on the lower body 20. By forming a fusion protrusion 27 buried in the upper plate 30 on the upper side of the projection 25, the small of the upper plate 30 has Hot fusion is also possible with heat capacity.

Hereinafter, the present invention will be described in more detail with reference to Examples.

<Example 1>

The waste vinyl containing about 40% by weight of soil is cut through a crusher with a width of about 50-200 mm and a length of 100-500 mm, and then melted in a melter heated to 280 ° C and put into a block molding compression mold. A width of 115 mm, a width of 230 mm, and a thickness of 60 mm is formed, and the inside of the block is formed at equal intervals with five cavities having a width of 36 mm in length at a cross section of 36 mm in width and 40 mm in length. A 3 mm "C" shaped elastic wing was formed such that the protruding length was 4 mm. On the other hand, during block molding, the inside of the cavity forming slider was introduced with a cooling water of 15 ° C. at a flow rate of 1 L per minute, and after 2 minutes, the slider was removed from the mold by a hydraulic press, and the compression mold was opened to demould the block.

After shrinking the block completely in the air for 24 hours, the shrinkage of the block checked was 230 mm in block length of 298.5 mm, 1.5 mm in width, and 115 mm in width of 114 mm in width. Mechanical strength of the block and 10m length thermal expansion test results are shown in Table 1 below.

Mechanical strength Thermal expansion Compressive strength Flexural strength The tensile strength Experimental temperature Block top Block bottom Expansion absorption 300㎏ / ㎠ 270㎏ / ㎠ 80㎏ / ㎠ 90 ℃ 81 ℃ 52 ℃ Good

<Example 2>

The waste vinyl containing about 40% by weight of soil is cut through a crusher with a width of about 50 to 200 mm and a length of 100 to 500 mm, and then melted in a melter heated to 280 ° C and put into a lower body molding compression mold. And form the lower body of 115mm width, 230mm length and 50mm thickness, but inside the lower body, form 5 cavities with the width of the block at equal intervals on the cross section of 36mm in width and 40mm in length and the outer peripheral surface of the block. The "C" type elastic wings with a thickness of 3 mm were made to have a protruding length of 4 mm. And the upper surface of the lower body was arranged equally 15 by engraving the joining groove of the upper side 2mm, the lower side 4mm, the height 2mm so as to form a trapezoidal forming projection. On the other hand, when the lower body was formed, 15 ° C. cooling water was introduced at a flow rate of 5 L / min inside the cavity forming slider, and the block was demolded after 2 minutes, and the block that had elapsed 24 hours after demolding had no change in appearance. .

The top plate was mixed with a wood powder having a size of 20 mesh or less and a polypropylene resin in a 50:50 weight ratio and injected from an injection machine heated at 250 ° C. to form a top plate having a width of 115 mm, a length of 230 mm, and a thickness of 10 mm. On the lower surface of the upper plate, 15 equally disposed embossed projections of 2mm in height and 2mm in height were formed so as to form trapezoidal joint grooves. On the other hand, when forming the upper plate, the coolant at 15 ° C. was introduced into the upper side and the lower side of the upper plate and cooled by 5 L per minute, and the upper plate after 24 hours after demolding did not change in appearance.

Bonding of the lower body and the top plate was applied by pressing the urethane resin on the joint surface of the lower body and the top plate, respectively, and pushed the embossed and engraved unevenness. Measured mechanical strength and 10m length thermal expansion test results are shown in Table 2 below.

Mechanical strength Thermal expansion Compressive strength Flexural strength The tensile strength Experimental temperature Block top Block bottom Expansion absorption 290㎏ / ㎠ 240㎏ / ㎠ 76㎏ / ㎠ 90 ℃ 80 ℃ 51 ℃ Good

<Example 3>

The top plate was mixed with a stone powder of less than 300mesh in size and polyethylene resin in a weight ratio of 60:40 and injected from an injection machine heated at 250 ° C. to form a top plate having a width of 115 mm, a length of 230 mm, and a thickness of 10 mm. On the lower surface of the upper plate, 15 equally disposed by embossing the joint protrusion of the upper side 2mm base side 4mm height 2mm so that the trapezoid joint groove is formed. On the other hand, in forming the upper plate, the cooling water at 15 ° C. was introduced into the upper and lower sides of the upper plate and cooled by 5 L per minute, and the upper plate after 24 hours after demolding did not change in appearance.

By cutting agricultural waste vinyl containing about 40% by weight of soil by width to about 50 ~ 200mm, length of 100 ~ 500mm through a crusher and melting in a melter heated to 280 ℃, and put into the lower body molding compression mold, A lower body of 115mm in width, 230mm in length and 60mm in thickness shall be formed, but inside the lower body, five cavities having a length of width of the block are formed at equal intervals in the cross section of 36mm in width and 40mm in length and at the outer peripheral surface of the block. A 3 mm "C" shaped elastic wing was provided with a protruding length of 4 mm.

Meanwhile, when forming the lower body, the upper plate formed in advance is placed on the lower end of the lower body molding compression mold installed in the compressor, and the coolant is introduced into each part of the mold for 2 minutes and 30 seconds after inputting the material of the lower body. The block was then demolded. Fusion of the lower body and the top plate of the demolded block was completed perfectly, and there was no deformation of the appearance of the block 24 hours after demolding. The measured mechanical strength and 10m length thermal expansion test results are shown in Table 3 below.

Mechanical strength Thermal expansion Compressive strength Flexural strength The tensile strength Experimental temperature Block top Block bottom Expansion absorption 280㎏ / ㎠ 260 kg / ㎠ 80㎏ / ㎠ 90 ℃ 80 ℃ 50 ℃ Good

<Example 4>

Agricultural waste vinyl containing about 40% by weight of soil is cut through a crusher with a width of about 50 to 200 mm and a length of 100 to 500 mm, and then melted in a melter heated to 280 ° C and put into a lower body molding compression mold. By forming a lower body having a width of 115 mm, a length of 230 mm, and a thickness of 54 mm, the inner part of the lower body is formed at equal intervals with five cavities having a length of width of the block at a cross section of 36 mm in width and 40 mm in length. On the outer circumferential surface, a "C" type elastic wing having a thickness of 3 mm was made to have a protruding length of 4 mm. And the upper surface of the lower body to form a trapezoidal joining groove is formed by embossing 15 joints of the upper side 2mm bottom side 4mm height 2mm equally, but on the upper side of the joining projection 2mm in height 1mm in length 115mm fusion protrusion 42 were installed. On the other hand, when the lower body was formed, the molten material was cooled down to 190 ° C in the air and introduced into a mold. After cooling 5 ° C of coolant at 15 ° C per minute, the product was cooled and demolded after 2 minutes. There was no deformation of the appearance.

The upper plate was mixed with a stone powder of less than 300mesh in size and polyethylene resin in a weight ratio of 60:40, and injected into a block upper plate mold having a width of 115 mm, a length of 230 mm, and a thickness of 60 mm in an injection machine heated at 250 ° C. First, the molding of the lower body having a thickness of 55 m was pre-molded into the injection mold, and then the molten material of the upper plate was injected, and demolded after 2 minutes. After 24 hours after demolding, the shape deformation of the block did not appear, and the fusion of the top layer and the bottom layer of the demolded block was perfect. The measured mechanical strength and 10m length thermal expansion test results are shown in Table 4 below.

Mechanical strength Thermal expansion Compressive strength Flexural strength The tensile strength Experimental temperature Block top Block bottom Expansion absorption 290 kg / ㎠ 270 kg / ㎠ 80 kg / ㎠ 90 ℃ 80 ℃ 61 ℃ Good

As can be seen in Tables 1 to 4, in the case of the recycling block according to each embodiment of the present invention, the strength represents a strength of 290 kg / cm 2 level required by cement concrete, and the bending strength is required by general cement blocks. 5 times or more of 50 kg / cm <2>. In addition, unlike the upper part directly exposed to the radiant heat at the ambient temperature of 90 ° C, the heat transfer to the lower part is less than the lower part, so the difference in the temperature of the lower part is about 30 ° C. Absorption of thermal expansion pressure to prevent the block from occurring in the construction surface of the installed block can be seen that it is effective to use outdoors. Good expansion absorption in Tables 1 to 4 means that there is no protruding phenomenon in a plurality of blocks laid by thermal expansion.

On the other hand, in the present invention, when the block 10 is formed by dividing the lower body 20 and the upper plate 30, the elastic wing 12 is not only the lower body 20, but also the upper plate 30 or lower body 20 And the top plate 30 may be formed in addition to the present invention. In addition, the present invention has been described with reference to the embodiments, but various modifications may be made by those skilled in the art without departing from the technical spirit of the present invention. Of course, it is possible to change and change the branches.

According to the waste plastic recycling block and the manufacturing method for absorbing the thermal expansion pressure according to the present invention as described above, it is possible to recycle the waste plastic for agriculture, which can be utilized as road paving material of the existing cement block and urethane road pavement Not only can the problem be avoided, but not only the production cost reduction and price competitiveness can be secured due to the recycling of waste resources, but also the recycling block according to the present invention can be 100% recycled, and the thermal expansion is large. By solving the disadvantages of the block structurally with synthetic resin, there is an effect that can be installed outdoors with a lot of temperature changes.

Claims (7)

A waste plastic recycling block having a cavity; A plurality of hollow portions 11 are formed inside the block, and the hollow portions 11 have a volume of 30 to 70% of the total volume of the block 10 including the hollow portions 11. The thickness of each vertical portion of the block-molded portion excluding the hollow portion 11 is 1 to 30 mm, and an elastic wing 12 protruding from the side of the block is formed on the outer circumferential surface of the block. The wing 12 is recycled waste plastic absorbing thermal expansion pressure, characterized in that its longitudinal section is formed in a curved "C" or "S" shaped spring effect shape to absorb the expansion force between the blocks constructed. block. delete The method of claim 1; The block is formed by dividing the lower body 20 and the upper plate 30 in which the cavity 11 is formed, and the trapezoid joining protrusion 25 and the joining recess 26 on the upper surface of the lower body 20. It is formed in succession, and the joining protrusions 25 and the other joining projections 35 and the joining grooves 35 corresponding to the joining grooves 26 are formed on the lower surface of the upper plate 30 to form the lower body 20 and the upper plate. 30 to be bound, and further formed a plurality of fusion projections 27 on the upper side of the bonding projection 25 of the lower body 20 so that the fusion projections 27 are buried in the upper plate (30). A waste plastic recycling block for absorbing thermal expansion pressure. delete A method of producing a waste plastic recycling block; The waste plastics crushed into 50 to 200 mm in width and 100 to 500 mm in length or conventional waste plastic crushed into chips of 0.1 to 15 mm are melted at 120 to 350 ° C. to form blocks, and the waste plastic raw materials are 30 to 70 weight. 30% to 70% by weight of sand or stone powder or wood powder having a diameter of 0.1 to 15 mm, or 30 to 70% by weight of glass fiber or carbon fiber or polymer fiber having a length of 1 to 50 mm as a reinforcing material, On the other hand, absorbing the thermal expansion pressure, characterized in that the elastic wing 12 of the "C" or "S" shaped cross section is formed on the outer peripheral surface of the block together with the hollow cavity 11 inside the forming block Method for producing a waste plastic recycling block. The method of claim 5; The block is formed by dividing the lower body 20 and the upper plate 30, respectively, and forming a trapezoidal joining protrusion 25 and a joining recess 26 on the upper surface of the lower body 20, and joining the joining. The other joining protrusion 35 and the joining recess 36 corresponding to the protrusion 25 and the joining recess 26 are formed on the bottom surface of the upper plate 30 to assemble the lower body 20 and the upper plate 30 by fitting them. A method for producing a waste plastic recycling block for absorbing thermal expansion pressure. The method of claim 5; The block is formed by dividing the lower body 20 and the upper plate 30, the lower body 20 or a trapezoidal continuous joint formed in the trapezoid shape continuous joining projection 25 and the joining groove 26. First, any one of the upper plate 30 having the protrusion 35 and the joining groove 36 is formed, and then insert-molded the molded lower body 20 or the upper plate 30 to mold the other part. Method for producing a waste plastic recycling block for absorbing thermal expansion pressure, characterized in that to form a.

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