Method for manufacturing a temporary fence using double extrusion molding and a temporary fence manufactured thereby

Abstract

The present invention relates to a method for manufacturing a temporary fence using double extrusion molding, designed to enable the front and rear sections to be realized in different colors through a process of washing and crushing reused or new PVC raw materials, and a color-specific blending and extrusion process, and to a temporary fence manufactured thereby. The method comprises: a washing step for washing reused or new PVC raw materials; a crushing step for crushing the washed raw materials to form particles; a raw material blending step for separating raw materials by color to be used for the front and rear sections and blending them respectively; an extruder transfer step for moving each blended raw material to an extruder by passing it through a separate conveying device; a raw material melting step for melting the raw materials in a dedicated cylinder at a set temperature; an individual extrusion step for extruding the molten raw materials of each color through dedicated molds for the front and rear sections respectively; and a product molding step for combining the two extruded raw materials into a single mold to form a single injection molded product.

Description

Technology Field

[0001] The present invention relates to a method for manufacturing a temporary fence using double extrusion molding and a temporary fence manufactured thereby. More specifically, the invention relates to a method for manufacturing a temporary fence using double extrusion molding designed to enable the front and rear sides to be realized in different colors by washing and crushing reused or new PVC raw materials and undergoing a color-specific mixing and extrusion process, and to a temporary fence manufactured thereby. Background Technology

[0003] Temporary fences are widely used at construction sites or site boundaries to ensure safety and to distinguish the exterior from the interior. Conventional temporary fences are often manufactured in a single color, primarily white, to ensure visibility and boundary clarity. However, this single color causes problems such as increased fatigue for internal workers and raising the temperature of the working environment due to reflected heat.

[0004] Furthermore, even if conventional temporary fences are recovered after use, they are difficult to reuse due to reduced durability or poor joints, and a significant portion are disposed of as waste, causing an environmental burden. Even materials that appear to be in good condition lose strength over time, increasing the risk of safety accidents.

[0005] Furthermore, methods such as painting or combining additional materials have been attempted to achieve different colors for the front and rear sections, but this complicates the process and requires the use of dissimilar materials such as adhesives and screws, causing significant difficulties in the disposal and recycling process.

[0006] To address these issues, technology is required that enables the front and back surfaces to be rendered in different colors using only a single extrusion molding process. Furthermore, a manufacturing method is needed that ensures uniform quality by efficiently controlling the entire process—including washing, crushing, blending, extrusion, cooling, and molding—while utilizing reusable PVC raw materials.

[0007] Meanwhile, the aforementioned background technology is technical information that the inventor possessed for the derivation of the present invention or acquired during the process of deriving the present invention, and it cannot necessarily be considered publicly known technology disclosed to the general public prior to the filing of the present invention. Prior art literature

[0009] Korean Registered Patent No. 10-0853101 (Published on August 19, 2008) The problem to be solved

[0010] One aspect of the present invention provides a temporary fence with distinct colors without a separate painting or bonding process by washing and crushing reused or new PVC raw materials, mixing the front and rear portions in different colors and extruding them separately, and combining them in a single mold to produce a finished product.

[0011] The technical problems of the present invention are not limited to those mentioned above, and other unmentioned technical problems will be clearly understood by those skilled in the art from the description below. means of solving the problem

[0013] A method for manufacturing a temporary fence using double extrusion molding according to one embodiment of the present invention comprises: a washing step for washing reusable or new PVC raw materials; a crushing step for crushing the washed raw materials to form particles; a raw material mixing step for separating raw materials by color to be used for the front and rear parts and mixing each; an extruder moving step for moving each mixed raw material to an extruder by passing it through a separate conveying device; a raw material melting step for melting the raw materials in a dedicated cylinder at a set temperature; an individual extrusion step for extruding the molten raw materials of each color through dedicated molds for the front and rear parts, respectively; and a product molding step for combining the two extruded raw materials into a single mold to form a single injection molded product.

[0014] In one embodiment, a method for manufacturing a temporary fence using double extrusion molding according to one embodiment of the present invention may further include a uniformization step of cooling a single injection product by temperature and vacuum control to prevent color bleeding and equalize strength; and a post-processing step of performing perforation and length cutting operations if necessary.

[0015] In one embodiment, the washing step may be performed by spraying washing water from a washing module installed on the upper side of the conveyor device onto reusable or new PVC raw material being transported along the conveyor device.

[0016] In one embodiment, the washing module may include: a module body portion extending in the left and right directions perpendicular to the direction of movement of the reusable or new PVC raw material; a hanger supporting the module body portion at the upper side of the conveyor device; and a plurality of spray nozzle portions spaced apart along the lower side of the module body portion to spray washing water in the direction of the reusable or new PVC raw material being transported.

[0017] In one embodiment, the spray nozzle portion comprises: a spray groove formed on the lower side of the module body portion, wherein the inner diameter gradually increases toward the lower opening to induce diffusion of the cleaning water; a spray nozzle installed on the upper side of the spray groove to spray the cleaning water into the spray groove; a diffusion block disposed in the inner space of the spray groove; a block support that supports the diffusion block in the spray groove; a straight spray path formed by penetrating the diffusion block in the vertical direction to allow the cleaning water sprayed through the spray nozzle to pass through and discharge; a plurality of diffusion control wings rotatably connected to the upper edge of the diffusion block and spaced apart along the upper edge of the diffusion block, with their lower ends positioned to be inclined away from the diffusion block to induce diffusion of the cleaning water moving downward along the spray groove; and a wing cover made of an elastic material capable of expansion and contraction, installed between the plurality of diffusion control wings to cover the spacing. A wing deployment ring formed in a circular ring shape, installed to be able to move up and down along the circumference of the diffusion block, positioned between the diffusion block and the diffusion control wing, and moving upward to lift the plurality of diffusion control wings from the diffusion block; a first ring lifting actuator installed in the diffusion block to support the wing deployment ring and simultaneously move the wing deployment ring up and down; an inclined spray path formed between the spray groove and the diffusion control wing to provide a path for the movement of cleaning water; multiple support mounting grooves formed extending longitudinally along the inclined surface of the spray groove and spaced apart radially at regular intervals along the side of the spray groove; and a cover support installed rotatably in the support mounting groove, stored in the support mounting groove, and having its lower end gradually exposed from the support mounting groove as it rotates.It may include: a spray control cover formed in the shape of a tube made of an elastic material capable of expansion and contraction, attached and installed along the plurality of cover supports, and positioned along the inclined surface of the spray groove, wherein as the plurality of cover supports are exposed from the support seating groove, the cover control cover deforms into a cone shape in the direction opposite to the inclined direction of the spray groove, thereby inducing the cleaning water sprayed through the spray groove to concentrate; a support deployment ring formed in the shape of a circular ring, positioned along the upper side of the support seating groove and seated on the upper inclined surface of the cover support, and which moves downward along the upper inclined surface of the cover support to rotate the cover support; and a second ring lifting actuator that supports the support deployment ring and simultaneously moves the support deployment ring up and down.

[0018] In one embodiment, the block support may be composed of an actuator that moves the diffusion block up and down.

[0019] In one embodiment, the injection nozzle part may further include an opening / closing valve installed in the straight injection path to open and close the straight injection path. Effects of the invention

[0021] According to one aspect of the present invention described above, impurities on the surface of the raw material are removed and the particle state is uniformly formed through the washing and grinding steps, thereby enabling stable extrusion and molding in subsequent processes.

[0022] In addition, since the front and rear sections are mixed by color, extruded independently, and then combined in a single mold, the exterior can be realized with a highly visible color and the interior with a low reflectivity color, thereby simultaneously improving safety and the working environment.

[0023] By cooling the product using a temperature- and vacuum control method during the homogenization stage, color bleeding can be prevented and uniformity of strength can be ensured, and specifications can be adjusted to suit site conditions through the post-processing stage. Therefore, the present invention provides the effect of significantly improving constructability and maintaining the quality of the finished product stably for a long period.

[0024] The effects of the present invention are not limited to those mentioned above, and various effects may be included within the scope obvious to a person skilled in the art from the contents described below. Brief explanation of the drawing

[0026] FIG. 1 is a flowchart illustrating a method for manufacturing a temporary fence using double extrusion molding according to one embodiment of the present invention. FIG. 2 is a drawing showing a temporary fence manufactured by a method for manufacturing a temporary fence using double extrusion molding according to one embodiment of the present invention. FIG. 3 is a flowchart illustrating a method for manufacturing a temporary fence using double extrusion molding according to another embodiment of the present invention. FIG. 4 is a drawing showing a cleaning module according to the present invention. FIGS. 5 to 9 are drawings showing the configuration of the injection nozzle part of FIG. 4. Specific details for implementing the invention

[0027] The following detailed description of the invention refers to the accompanying drawings, which illustrate specific embodiments in which the invention may be practiced. These embodiments are described in sufficient detail to enable those skilled in the art to practice the invention. It should be understood that various embodiments of the invention are different but need not be mutually exclusive. For example, specific shapes, structures, and characteristics described herein may be implemented in other embodiments without departing from the spirit and scope of the invention in relation to one embodiment. It should also be understood that the location or arrangement of individual components within each disclosed embodiment may be changed without departing from the spirit and scope of the invention. Accordingly, the following detailed description is not intended to be limiting, and the scope of the invention is limited only by the appended claims, including all equivalents to those claimed therein, provided appropriately described. Similar reference numerals in the drawings refer to the same or similar functions across various aspects.

[0028] Hereinafter, preferred embodiments of the present invention will be described in more detail with reference to the drawings.

[0029] FIG. 1 is a flowchart illustrating a method for manufacturing a temporary fence using double extrusion molding according to one embodiment of the present invention.

[0030] Referring to FIG. 1, a method for manufacturing a temporary fence using double extrusion molding according to one embodiment of the present invention includes a washing step (S110), a crushing step (S120), a raw material mixing step (S130), an extruder moving step (S140), a raw material melting step (S150), an individual extrusion step (S160), and a product molding step (S170).

[0031] The washing step (S110) is a step for ensuring the quality of the raw material in subsequent processes by washing the reused or new PVC raw material to remove impurities. Through this process, surface contamination of the product can be prevented and uniform molding characteristics can be obtained.

[0032] The crushing step (S120) is a step of crushing the washed PVC raw material to form particles. By controlling the particle size consistently in this step, the mixing efficiency is increased, and uniform heat transfer during melting becomes possible.

[0033] The raw material mixing step (S130) is a step of separating and independently mixing raw materials by color to realize the front and rear parts in different colors. This process allows for differentiation not only in color but also in physical properties of the front and rear parts, thereby enabling the free selection and application of colors for the front and rear parts to suit various purposes, such as stage spaces and film sets, as well as basic uses like construction sites.

[0034] For example, the rear can be made black to separate the space behind the stage, or the front can be made green to be used as a background for special effects filming; by changing the color according to the purpose in this way, functional and visual requirements can be satisfied simultaneously.

[0035] The extruder transfer step (S140) is a step of transferring each blended raw material to the extruder through a separate transfer device. This step increases the precision of the double extrusion process by ensuring that raw materials of different colors are transferred stably without mixing.

[0036] The raw material melting step (S150) is a step of melting the raw material in a dedicated cylinder at a set temperature. By controlling the temperature based on the mixing ratio and physical properties of each raw material, uniformity of melting can be ensured.

[0037] The individual extrusion step (S160) is a step in which molten raw material is extruded through dedicated molds for the front and rear sections, respectively. Through this, semi-finished products are formed according to color and physical properties, and a basic structure for joining is prepared in a subsequent step.

[0038] The product molding step (S170) is a step in which the extruded materials of the front and rear parts are combined into a single mold to form a single injection molded product. Through this, the effect of producing a single finished product without a separate painting or bonding process can be achieved.

[0039] The method for manufacturing a temporary fence using double extrusion molding according to one embodiment of the present invention, having the configuration described above, has the effect of simultaneously satisfying environmental requirements inside and outside the construction site by increasing production efficiency through process simplification and enabling different colors and physical properties for the front and rear parts.

[0041] A method for manufacturing a temporary fence using double extrusion molding according to one embodiment of the present invention having the configuration described above may further include a homogenization step (S180) and a post-processing step (S190).

[0042] The homogenization step (S180) is a step of cooling a single injection-molded product after the product molding step (S170) using a temperature-based vacuum control method. This process prevents color bleeding between the front and back surfaces and ensures that the strength of the entire product is maintained uniformly. Additionally, by minimizing the generation of internal bubbles during cooling through vacuum control, the structural stability of the product can be ensured.

[0043] The post-processing step (S190) is a step of performing perforation and length cutting operations on a single injection-molded product if necessary. This step enables the temporary fence to be manufactured to meet the specifications or structural requirements of the installation site, and has the effect of improving constructability and compatibility.

[0044] A method for manufacturing a temporary fence using double extrusion molding according to one embodiment of the present invention having the configuration described above can more stably ensure the quality of the product through a post-processing step after product molding and provides an advantageous effect for customized on-site construction.

[0046] In one embodiment, the washing step (S110) can be performed by spraying washing water from a washing module (20) installed on the upper side of the conveyor device onto the reusable or new PVC raw material being transported along the conveyor device (10).

[0047] The conveyor device (10) is a device that transports reused or new PVC raw materials at a constant speed and plays a role in increasing the stability of subsequent processes by ensuring that the raw materials are moved uniformly. This conveyor device (10) is connected to a washing module (20) to enable a continuous washing process of the raw materials.

[0048] The washing module (20) is a device installed on the upper side of the conveyor device (10) to spray washing water onto the raw material being transported. The washing water sprayed from the washing module (20) effectively removes impurities from the surface of the raw material and makes the condition of the raw material uniform, thereby preventing quality degradation during subsequent extrusion molding. In addition, the installation position and angle of the washing module (20) can be adjusted according to the movement path of the raw material, thereby maximizing washing efficiency.

[0049] In one embodiment, the cleaning module (20) may include a module body part (100), a hanger (200), and a spray nozzle part (300).

[0050] The module body (100) is a structure formed to extend in a left-right direction perpendicular to the direction of movement of the reused or new PVC raw material. This module body (100) serves as an overall support frame for the washing module (20) and can form an internal flow path so that washing water can be sprayed smoothly.

[0051] The hanger (200) is configured to be located on the upper side of the conveyor device (10) to stably support the module body (100). The hanger (200) can be designed to adjust the height and angle of the washing module (20), thereby optimizing the spray angle and spray range when washing raw materials.

[0052] A plurality of spray nozzles (300) are spaced apart along the lower side of the module body (100) and spray washing water in the direction of the raw material being transported. The spray nozzles (300) maintain a constant pressure and spray angle to effectively remove impurities from the surface of the raw material, and the arrangement of the nozzles can be configured in various ways depending on the movement speed and shape of the raw material.

[0053] A cleaning module (20) according to one embodiment of the present invention having the configuration described above can uniformly and stably clean raw materials through the cooperative action of the module body part (100), the hanger (200), and the spray nozzle part (300), thereby having the effect of ensuring the quality of the raw materials in a subsequent extrusion molding process.

[0054] A washing step (S110) according to one embodiment of the present invention having the configuration described above has the effect of effectively removing impurities from the raw material through the cooperative action of the conveyor device (10) and the washing module (20), and maintaining stable raw material quality throughout the double extrusion molding process.

[0056] FIGS. 5 to 9 are drawings showing the configuration of the injection nozzle part of FIG. 4.

[0057] Referring to FIGS. 5 to 9, a spray nozzle part (300) according to one embodiment of the present invention includes a spray groove (301), a spray nozzle (302), a diffusion block (303), a block support (304), a straight spray path (305), a diffusion control wing (306), a wing cover (307), a wing deployment ring (308), a first ring lifting actuator (309), an inclined spray path (310), a support mounting groove (311), a cover support (312), a spray control cover (313), a support deployment ring (314), and a second ring lifting actuator (315).

[0058] The spray groove (301) is formed on the lower side of the module body (100) and has a structure in which the inner diameter gradually increases toward the lower opening. This spray groove (301) induces the washing water to naturally diffuse so that it can be uniformly sprayed over the front surface of the transported raw material, and subsequently, in conjunction with the diffusion block (303) and the diffusion control wing (306), finely controls the spray angle and spray range of the washing water.

[0059] The spray nozzle (302) is a core component installed on the upper side of the spray groove (301) to supply washing water. The washing water flows into the spray groove (301) and then passes through the diffusion block (303) and the straight spray path (305) to be sprayed in the direction of the raw material. During this process, the spray nozzle (302) maintains a constant supply pressure to ensure stable spraying without fluctuations in the flow rate of the washing water.

[0060] The diffusion block (303) is placed in the inner space of the spray groove (301) to disperse the sprayed cleaning water and deliver a cleaning effect over a wide area. The diffusion block (303) is stably supported by a block support (304), and since the block support (304) supports vertical movement, the position of the diffusion block (303) can be adjusted, thereby allowing the dispersion intensity and spray range of the cleaning water to be changed according to the situation.

[0061] In one embodiment, the block support (304) may be an actuator that moves the diffusion block (303) up and down.

[0062] The block support (304) is configured to stably support the diffusion block (303) from below, while simultaneously enabling it to move up and down by the operation of an actuator. Through this, the spray intensity and spray angle of the washing water can be adjusted according to the movement speed and degree of contamination of the raw material.

[0063] The actuator can be formed as an electric or hydraulic type and can finely adjust the position of the diffusion block (303). For example, if the diffusion block (303) is moved upward, the dispersion angle of the washing water is widened so that the outer surface of the raw material can be cleaned uniformly, and conversely, if it is moved downward, the spray pressure of the washing water is concentrated so that it can have the effect of removing severe contamination from the surface of the raw material.

[0064] In addition, the combined action of the block support (304) and the diffusion block (303) operates together with the straight injection path (305) and the diffusion control blade (306) to control the flow of washing water in multiple stages. This allows for flexible response according to the degree of contamination on the surface of the raw material and the washing requirements.

[0065] A block support (304) according to one embodiment of the present invention having the configuration described above can maximize cleaning efficiency by moving the diffusion block (303) up and down, and can control the spraying characteristics of the cleaning water according to the situation, thereby having the effect of improving the performance of the entire cleaning module.

[0066] The straight injection channel (305) is formed by penetrating the diffusion block (303) in the vertical direction and is a passage through which washing water is directly discharged. This straight injection channel (305) penetrates the interior of the diffusion block (303) and maintains the flow of washing water in a straight direction so that it is sprayed onto the surface of the raw material with strong pressure, and is combined with the diffusion control blade (306) to enable a combination of straight injection and diffusion injection.

[0067] A plurality of diffusion control wings (306) are rotatably connected to the upper edge of the diffusion block (303) and spaced apart at regular intervals. These wings are installed at an angle so that their lower ends are away from the diffusion block (303), thereby inducing the washing water discharged from the straight spray path (305) to spread outward from the raw material. Accordingly, the spray nozzle section (300) can perform straight washing and diffusion washing simultaneously.

[0068] The wing covers (307) are installed with an elastic material between the diffusion control wings (306) to cover the gaps, preventing leakage of washing water while controlling the flow of dispersed washing water. This enables fine cleaning capable of removing even minute contaminants from the surface of the raw material.

[0069] The wing deployment ring (308) is installed to be vertically movable along the circumference of the diffusion block (303) so as to be able to raise or lower the diffusion control wing (306). This process is controlled by the first ring lifting actuator (309), and as a result, the spray angle and degree of diffusion of the cleaning water can be flexibly adjusted.

[0070] The inclined spray channel (310) is formed between the spray groove (301) and the diffusion control wing (306) to allow a portion of the washing water to flow in an inclined direction, thereby allowing the washing water to reach the side or lower area of ​​the raw material. Unlike straight spraying, this serves to supplement the washing of shaded areas.

[0071] The support mounting groove (311) is formed along the inclined surface of the spray groove (301) and is structured so that the cover support (312) is rotatably installed. When the cover support (312) rotates, it is gradually exposed to assist the flow of the spray groove (301) and controls the concentration of the cleaning water in conjunction with the spray control cover (313).

[0072] The spray control cover (313) is attached to the cover support (312) in the shape of a tube made of elastic material, and as the cover support (312) is exposed, it deforms into a cone shape to induce the cleaning water to concentrate in a specific area. This structure maximizes cleaning efficiency, allowing even heavily contaminated raw material parts to be effectively cleaned.

[0073] The support deployment ring (314) is positioned on the upper side of the cover support (312) and rotates the cover support (312) to adjust the spray angle when moving downward, and is controlled by the second ring lifting actuator (315). As a result, the cleaning flow associated with the spray control cover (313) can be concentrated or spread out depending on the situation.

[0074] A spray nozzle unit (300) according to one embodiment of the present invention having the configuration described above is organically combined with a straight spray path (305), a diffusion control blade (306), an inclined spray path (310), a spray control cover (313), etc., to perform straight spraying, diffusion spraying, and concentrated spraying of washing water in stages, thereby having the effect of uniformly washing PVC raw materials of various sizes and shapes.

[0076] A spray nozzle part (300) according to one embodiment of the present invention having the configuration as described above may further include an opening / closing valve (316) installed in a straight spray path (305) to open and close the straight spray path (305).

[0077] The spray nozzle (302) is a core component that supplies cleaning water to the spray groove (301) within the cleaning module (20) and operates integrally with the opening / closing valve (316). The opening / closing valve (316) is installed at the inlet of the straight spray path (305) to control whether cleaning water is sprayed, and the amount of spray and the pressure of spray can be adjusted according to the opening / closing operation.

[0078] The opening and closing valve (316) can be implemented as a solenoid type operated by an electrical signal or as an automatic opening and closing type based on pressure changes, thereby enabling precise spray control according to the raw material transfer speed, the required amount of washing water, and the washing intensity.

[0079] In particular, the spray nozzle (302) and the straight spray path (305) operate in conjunction with the diffusion block (303), the diffusion control blade (306), the spray control cover (313), etc. When the spray amount is controlled through the opening / closing valve (316), the spray angle is expanded or concentrated after passing through the diffusion block (303), and various spray patterns are formed by the rotation of the diffusion control blade (306) and the lifting of the blade deployment ring (308). As a result, the washing water can be switched between straight spray, diffusion spray, and concentrated spray according to the situation, thereby maximizing the efficiency of washing raw materials.

[0080] A spray nozzle unit (300) according to one embodiment of the present invention having the configuration described above can finely control the amount and pressure of the sprayed washing water through connection with an opening / closing valve (316), thereby having the effect of responding to various washing conditions.

[0082] The embodiments described above are for illustrative purposes only, and those skilled in the art will understand that other specific forms can be easily modified without altering the technical concept or essential features of the embodiments described above. Therefore, the embodiments described above should be understood as illustrative in all respects and not restrictive. For example, each component described as a single unit may be implemented in a distributed manner, and components described as distributed may likewise be implemented in a combined form.

[0084] The scope of protection sought through this specification is defined by the claims set forth below rather than by the detailed description above, and should be interpreted to include all modifications or variations derived from the meaning and scope of the claims and the concept of equivalents. Explanation of the symbols

[0086] 10: Conveyor device 20: Cleaning module 100: Module body 200: Hanger 300: Spray nozzle part

Claims

Claim 1 A method for manufacturing a temporary fence using double extrusion molding, which enables the production of a temporary fence capable of simultaneously satisfying environmental and functional requirements by freely changing the colors of the front and rear sections according to the purpose of use, comprising: a washing step for washing reusable or new PVC raw materials; a crushing step for crushing the washed raw materials to form particles; a raw material mixing step for separating raw materials by color to be used for the front and rear sections and mixing them respectively; an extruder transfer step for moving each mixed raw material to an extruder by passing it through a separate transfer device; a raw material melting step for melting the raw materials in a dedicated cylinder at a set temperature; and an individual extrusion step for extruding the melted raw materials of each color through dedicated molds for the front and rear sections respectively. The method includes a product molding step in which two extruded raw materials are combined in a single mold to form a single injection molded product; wherein the washing step performs washing by spraying washing water from a washing module installed on the upper side of the conveyor device onto a reusable or new PVC raw material being transported along a conveyor device, and the washing module comprises: a module body part extending in the left and right directions perpendicular to the direction of movement of the reusable or new PVC raw material; and a hanger supporting the module body part on the upper side of the conveyor device. and a plurality of spray nozzle sections spaced apart and installed along the lower side of the module body section to spray washing water in the direction of reusable or new PVC raw materials being transported; wherein the spray nozzle section comprises: a spray groove formed on the lower side of the module body section, wherein the inner diameter gradually increases toward the lower opening to induce diffusion of washing water; a spray nozzle installed on the upper side of the spray groove to spray washing water into the spray groove; a diffusion block disposed in the inner space of the spray groove; a block support that supports the diffusion block in the spray groove; and a straight spray path formed by penetrating the diffusion block in the vertical direction to allow the washing water sprayed through the spray nozzle to pass through and be discharged.A diffusion control wing that is rotatably connected and installed on the upper edge of the diffusion block and spaced apart in multiple numbers along the upper edge of the diffusion block, with its lower end positioned at an angle away from the diffusion block to guide the diffusion of washing water moving downward along the spray groove; a wing cover made of an elastic material capable of expansion and contraction, installed between the multiple diffusion control wings to cover the spacing; a wing deployment ring made of a circular ring shape, installed to move up and down along the circumference of the diffusion block, positioned between the diffusion block and the diffusion control wing, and moving upward to lift the multiple diffusion control wings away from the diffusion block; a first ring lifting actuator installed on the diffusion block to support the wing deployment ring while simultaneously moving the wing deployment ring up and down; an inclined spray path formed between the spray groove and the diffusion control wing to provide a path for the movement of washing water; a support mounting groove formed extending longitudinally along the inclined surface of the spray groove and spaced apart in multiple numbers radially along the side of the spray groove at regular intervals; the support A cover support installed to be rotatable in a mounting groove and stored in the support mounting groove, with its lower end gradually exposed from the support mounting groove as it rotates; and a spray control cover formed in the shape of a tube made of an elastic material capable of expansion and contraction, attached along a plurality of cover supports and positioned along the inclined surface of the spray groove, and deforming into a cone shape opposite to the inclined direction of the spray groove as the plurality of cover supports are exposed from the support mounting groove, thereby inducing the cleaning water sprayed through the spray groove to be concentrated.A method for manufacturing a temporary fence using double extrusion molding, comprising: a support unfolding ring formed in a circular ring shape, disposed along the upper side of the support mounting groove and seated on the upper inclined surface of the cover support, and moving downward along the upper inclined surface of the cover support to rotate the cover support; and a second ring lifting actuator that supports the support unfolding ring and simultaneously moves the support unfolding ring up and down. 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