Mold for styrofoam molding

Abstract

The present invention relates to a mold for molding styrofoam, wherein steam or cooling water is injected into a molding hole through a spray nozzle, and the styrofoam raw material contained in the molding hole is molded, wherein one end of the spray nozzle is embedded to correspond to the shape of the outer surface of the molding hole, thereby preventing the shape of the spray nozzle from being imprinted on the molded styrofoam. According to the present invention, one end of the spray nozzle is embedded and installed to correspond to the shape of the inner surface of the molding hole, thereby preventing the spray nozzle from being exposed to the inner surface of the molding hole. By preventing the spray nozzle from being exposed, the shape of the spray nozzle is prevented from being imprinted on the styrofoam being molded inside the molding hole. Due to the prevention of the spray nozzle shape being imprinted, the styrofoam molded inside the outer mold can be used as is, thereby reducing working time. As a result of reducing working time, work efficiency and production efficiency are improved simultaneously. In particular, the spray nozzle is fixed to the first discharge port by a fastening member, so that the fastening force is always firmly maintained regardless of repeated steam or cooling water operations. Furthermore, the spray nozzle can be easily fastened or detached by the fastening member, making maintenance of the spray nozzle fastened to the first discharge port very convenient, and accordingly, the reliability of the product is improved.

Description

Technology Field

[0001] The present invention relates to a mold for molding styrofoam, and more specifically, to a mold for molding styrofoam in which a spray nozzle is inserted into a first discharge port of an outer mold and a fastening member is fastened and fixed to the end thereof, and one end of the spray nozzle is embedded and installed to correspond to the shape of the inner surface of the molding hole, thereby preventing the shape of the spray nozzle from being formed on the styrofoam being molded inside the outer mold. Background Technology

[0002] Generally, unlike other plastic moldings, styrofoam molding is performed by injecting steam and cooling water during the molding process. The sequence of producing a molded product using a styrofoam molding device is as follows: first, styrofoam raw material is fed into the molding device, then high-temperature steam is used to weld the styrofoam raw material, and after the welding is completed, cooling water is sprayed onto the molded product to cool it down, and then the product is discharged and dried to produce the molded product.

[0003] Accordingly, such a mold for molding styrofoam has a nozzle formed therein for injecting high-temperature steam or cooling water, and the process of injecting steam or cooling water into the mold through this nozzle to fuse and cool the styrofoam is performed to mold the styrofoam into a predetermined shape.

[0004] Patent Document 1 relates to a conventional styrofoam molding device, and with reference thereto, it comprises a fixed mold or a movable mold having a recessed groove of a predetermined shape formed inside, a casting having a hollow shape with one side open, a sealing cover that surrounds the fixed mold or the movable mold, and a plurality of nozzles formed on the inner wall surface for spraying steam or cooling water, a fluid supply frame embedded within the casting and communicating with the plurality of nozzles, and guiding the steam or cooling water to move inward to the nozzles, and a spray nozzle having one end exposed to the outside of the casting and the other end connected to the nozzles to spray steam or cooling water into the fixed mold or the movable mold.

[0005] Here, styrofoam material is filled into a movable mold or a fixed mold, and in that state, the movable mold or the fixed mold is sealed and covered with a casting, and steam is supplied through a fluid supply frame so that steam reaches each nozzle.

[0006] Then, steam is supplied through the inlet of the spray nozzle installed in the spray port, and then steam is sprayed through the outlet in the direction of the styrofoam raw material filled in the fixed mold or movable mold, so that the styrofoam raw material is heated and foamed and fused, and is molded to correspond to the shape of the space between the movable mold or fixed mold and the casting.

[0007] Afterwards, by spraying cooling water onto the molded styrofoam through a spray nozzle in the same manner as above, the styrofoam is maintained in a molded state.

[0008] However, the above-described patent document 1 has the inconvenience of requiring a separate operation to cut a portion of the styrofoam with the spray nozzle shape imprinted thereon after collecting the molded styrofoam, in which a spray nozzle is protruded and fastened to the inner wall of the casting, and an imprint corresponding to the shape of the spray nozzle is formed on the styrofoam molded by foam fusion between the movable mold or fixed mold and the casting, and the cutting operation of the spray nozzle imprinted portion causes a delay in work time and a rapid decrease in production efficiency. Furthermore, since the spray nozzle is simply fastened to the nozzle in a spiral manner, the fastening force of the spray nozzle decreases during the process of repeatedly spraying high-pressure steam or cooling water, causing the spray nozzle to easily detach from the nozzle. Due to this detachment of the spray nozzle, the foamed styrofoam gets stuck in the nozzle, causing a blockage of the nozzle. Additionally, the styrofoam molding operation is carried out while frequently checking the fastening status of multiple spray nozzles, making maintenance very inconvenient and consequently reducing the reliability of the product. Prior art literature

[0009] (Patent Document 0001) KR 10-1667489 B1 The problem to be solved

[0010] The present invention is intended to solve the problems described above. The objective of the present invention is to provide a mold for molding styrofoam that has an outer mold formed with a molding hole inside, a first discharge port formed on the inner surface of the molding hole, and a first supply pipe formed on the side for receiving steam or cooling water, and a spray nozzle installed in the first discharge port such that one end is exposed to the outer surface opposite to the inner surface of the molding hole, and one end is embedded so as to correspond to the outer surface of the molding hole, and a plurality of spray holes are formed in the central part, and a fastening member is fastened to the end of the spray nozzle so that the spray nozzle is fastened and fixed to the first discharge port, and steam or cooling water is supplied into the first discharge port through the first supply pipe, so that steam or cooling water is sprayed into the molding hole through the spray hole of the spray nozzle, thereby molding the styrofoam raw material contained in the molding hole, wherein the one end of the spray nozzle is embedded so as to correspond to the shape of the outer surface of the molding hole, thereby preventing the shape of the spray nozzle from being imprinted on the molded styrofoam. means of solving the problem

[0011] To achieve the above-mentioned objective of the present invention, the mold for styrofoam molding according to the present invention comprises: an outer mold having a double-wall structure, having one side open to form a molding hole having a predetermined shape inside, having a plurality of first discharge ports formed on the inner surface of the molding hole, and having a first supply pipe formed to receive steam on the side and allow steam or cooling water to be sprayed into the molding hole through the first discharge ports; a spray nozzle that enters into the first discharge ports from the inner surface of the molding hole of the outer mold, having its end exposed to the wall of the inner space of the double-wall structure opposite to the inner surface of the molding hole, having one end embedded so as to correspond to the inner surface of the molding hole, and having a plurality of spray holes formed in the center to guide steam or cooling water to be sprayed into the molding hole; and a fastening member that is fastened to the end of the spray nozzle and forces the spray nozzle to be maintained in a state where it is fastened to the first discharge port.

[0012] In the mold for molding styrofoam according to the present invention, the outer mold is formed as a single structure or is formed so as to be separated from one another, and is characterized by forming the molding hole therein.

[0013] In a mold for molding styrofoam according to the present invention, the outer mold further comprises: a first embedded groove formed by recessing on an inner surface corresponding to a first discharge port, such that the diameter is relatively larger than the diameter of the first discharge port; a head portion that prevents the injection nozzle from rotating in place when the fastening member is fastened, such that the injection nozzle is fixed by being embedded in the first embedded groove so as not to be exposed to the inner surface of the molding hole; and a leg portion that extends from the head portion, is inserted to penetrate the first discharge port, allows the fastening member to be fastened at its end, and is formed as a single through portion in the center to communicate with the injection hole, thereby forming a gathering hole for injecting steam in the direction of the molding hole.

[0014] In a mold for molding styrofoam according to the present invention, the injection nozzle is characterized by cutting the head portion to correspond to the shape of the inner surface of the molding hole when a part of the head portion inserted into the first embedded groove is exposed to the inner surface of the molding hole, thereby preventing the head portion from being exposed to the inner surface of the molding hole.

[0015] A mold for molding styrofoam according to the present invention comprises: an outer mold having a double-walled structure, having one side open to form a molding hole having a predetermined shape inside, having a plurality of first discharge ports formed on the inner surface of the molding hole, and having a first supply pipe formed to receive steam on the side and allow steam or cooling water to be sprayed into the molding hole through the first discharge ports; and an inner mold having a hollow shape, having an inner molding mold formed to be enclosed by the outer mold at a predetermined distance from the molding hole, having a plurality of second discharge ports formed on the outer surface of the inner molding mold to spray steam or cooling water in the direction of the molding hole, and having a second supply pipe formed on one side of the inner molding mold to receive steam or cooling water and guide the steam or cooling water to be sprayed into the second discharge ports. The invention is characterized by comprising: a spray nozzle having a plurality of spray holes formed in the central portion to guide steam or cooling water to be sprayed into the molding hole, wherein the nozzle is inserted into the first discharge port from the inner surface of the molding hole of the above-described outer mold, the end thereof is exposed to the wall of an internal space of a double-wall structure opposite to the inner surface of the molding hole, and one end thereof is embedded and installed to correspond to the outer surface of the molding hole, or the nozzle is inserted into the second discharge port from the outer surface of the inner molding mold of the above-described inner mold, the end thereof is exposed to the inner surface opposite to the outer surface of the inner molding mold, and one end thereof is embedded and installed to correspond to the inner surface of the inner molding mold; and a fastening member that is fastened to the end of the spray nozzle and forces the spray nozzle to be maintained in a state of being fastened to the first discharge port and the second discharge port.

[0016] In a mold for molding styrofoam according to the present invention, the outer mold further forms a first embedded groove formed by recessing on an inner surface corresponding to the first discharge port, such that the first groove has a diameter relatively larger than the diameter of the first discharge port; the inner mold further forms a second embedded groove formed by recessing on an outer surface corresponding to the second discharge port, such that the second groove has a diameter relatively larger than the diameter of the second discharge port; and the injection nozzle is fixed by being embedded within the first embedded groove so as not to be exposed to the inner surface of the molding hole, or inserted and fixed into the second embedded groove so as not to be exposed to the outer surface of the inner molding mold, thereby preventing the injection nozzle from rotating in place when the fastening member is fastened; It is characterized by being composed of a leg portion (303) that is extended from the head portion, inserted to penetrate the first discharge port, allowing the fastening member to be fastened at its end, and formed as a single through portion in the center to communicate with the injection hole, thereby forming a gathering hole for injecting steam in the direction of the molding hole.

[0017] In a mold for molding styrofoam according to the present invention, the injection nozzle is characterized by cutting the head portion so as to correspond to the shape of the inner surface of the molding hole and the outer surface of the inner molding mold when the head portion inserted into the first embedded groove is exposed to the inner surface of the molding hole or the head portion inserted into the second embedded groove is exposed to the outer surface of the inner molding mold, thereby preventing the head portion from being exposed to the inner surface of the molding hole and the outer surface of the inner molding mold.

[0018] In the mold for molding styrofoam according to the present invention, the injection nozzle is characterized by having a screw thread formed on the outer circumference of the end so that the fastening member is fastened and fixed in a spiral manner. Effects of the invention

[0019] According to the present invention, one end of the spray nozzle is embedded and installed to correspond to the shape of the inner surface of the molding hole, thereby preventing the spray nozzle from being exposed to the inner surface of the molding hole. By preventing the spray nozzle from being exposed, the shape of the spray nozzle is prevented from being imprinted on the styrofoam being molded inside the molding hole. Due to the prevention of the spray nozzle shape being imprinted, the styrofoam molded inside the outer mold can be used as is, thereby reducing working time. As a result of reducing working time, work efficiency and production efficiency are improved simultaneously. In particular, the spray nozzle is fixed to the first discharge port by a fastening member, so that the fastening force is always firmly maintained regardless of repeated steam or cooling water operations. Furthermore, the spray nozzle can be easily fastened or detached by the fastening member, making maintenance of the spray nozzle fastened to the first discharge port very convenient, and accordingly, the reliability of the product is improved. Brief explanation of the drawing

[0020] FIG. 1 is a perspective view showing a mold for molding styrofoam according to a first embodiment of the present invention. FIG. 2 is an exploded perspective view of FIG. 1. FIG. 3 is a perspective view of a key part showing the state of attaching a spray nozzle to the outer frame of a styrofoam molding mold according to the first embodiment of the present invention. FIG. 4 is a cross-sectional view of an outer frame of a styrofoam molding die according to the first embodiment of the present invention with a spray nozzle attached thereto. FIG. 5 is a cross-sectional view showing a state in which styrofoam raw material is contained within the outer frame of a styrofoam molding die according to the first embodiment of the present invention. FIG. 6 is a perspective view showing a mold for molding styrofoam according to a second embodiment of the present invention. Fig. 7 is an exploded perspective view of Fig. 6. FIG. 8 is a perspective view showing the state of attaching a spray nozzle to an inner mold of a styrofoam molding die according to a second embodiment of the present invention. FIG. 9 is a cross-sectional view showing the state in which the outer part of the inner mold of a styrofoam molding die according to the second embodiment of the present invention is wrapped and covered by an outer mold. Specific details for implementing the invention

[0021] Hereinafter, embodiments of the present invention will be described in more detail with reference to the attached drawings.

[0023] [1st Example]

[0024] Referring to FIGS. 1 to 5, the outer mold (100) has a double-walled structure, with one side open to form a molding hole (101) having a predetermined shape inside, and a plurality of first discharge ports (101a) are formed on the inner circumference of the molding hole (101), and a first supply pipe (102) is formed to receive steam on the side and allow steam or cooling water to be sprayed into the molding hole (101) through the first discharge ports (101a).

[0025] It is preferable that the above outer mold (100) finishes one side so that the interior is sealed while the styrofoam raw material is supplied into the molding hole (101) through one side.

[0026] The above outer mold (100) sprays steam into the molding hole (101) through the first discharge port (101a) so that the styrofoam raw material contained in the molding hole (101) is molded to correspond to the shape of the molding hole (101).

[0027] The above outer mold (100) sprays cooling water into the molding hole (101) through the first discharge port (101a) to cool the styrofoam molded in the molding hole (101).

[0028] The above-mentioned outer mold (100) is formed as a single structure or is formed so as to be separated from one another, thereby forming the molding hole (101) inside it.

[0029] When the above outer molds (100) are formed to be separated from each other, the first supply pipe (102) is formed in each of the above outer molds (100) to supply steam or cooling water to each.

[0030] The above outer mold (100) further forms a first embedded groove (101b) formed by being recessed on the inner surface corresponding to the first discharge port (101a) to have a diameter relatively larger than the diameter of the first discharge port (101a).

[0031] The first embedded groove (101b) allows the head portion (302) of the injection nozzle (300) to enter, thereby preventing rotation of the head portion (302) and preventing the injection nozzle (300) from being exposed to the inner surface of the molding hole (101).

[0032] It is preferable that the first embedded groove (101b) be formed to correspond to the shape of the head portion (302) of the injection nozzle (300).

[0033] The above outer mold (100) sprays steam and cooling water toward the outer surface of the styrofoam raw material contained in the molding hole (101) through the first discharge port (101a).

[0034] The injection nozzle (300) enters the first discharge port (101a) from the inner surface of the molding hole (101) of the outer mold (102), and its end is exposed to the inner space wall of a double-wall structure opposite to the inner surface of the molding hole (101), while one end is embedded so as to correspond to the outer surface of the molding hole (101), and a plurality of injection holes (301) are formed in the central part to guide steam or cooling water to be injected into the molding hole (101).

[0035] The above injection nozzle (300) guides the steam or cooling water that has reached the first discharge port (101a) to be injected into the molding hole (101).

[0036] The above-mentioned spray nozzle (300) is fixedly installed in the first discharge port (101a) to block the styrofoam raw material being expanded and molded in the molding hole (101) from flowing into the first discharge port (101a).

[0037] The above-mentioned injection nozzle (300) is fixedly embedded within the first embedded groove (101b) so as not to be exposed to the inner surface of the molding hole (101), and is composed of a head portion (302) that prevents the injection nozzle (300) from rotating in place when the fastening member (400) is fastened, and a leg portion (303) that is extended from the head portion (302), inserted to penetrate the first discharge port (101a) to allow the fastening member (400) to be fastened at its end, and formed as a single penetrating portion in the center to communicate with the injection hole (301) and has a gathering hole (303a) formed to spray steam in the direction of the molding hole (101).

[0038] It is preferable that the head portion (302) be formed in a polygonal shape and fixed in the first embedded groove (101b).

[0039] The head portion (302) enters the first embedded groove (101b) and is prevented from being exposed to the inner surface of the molding hole (101), thereby preventing an imprint from being formed on the styrofoam being expanded and molded within the molding hole (101).

[0040] The head portion (302) is fixedly installed within the first embedded groove (101b) to prevent the leg portion (303) from rotating in place within the first discharge port (101a).

[0041] When a part of the head portion (302) inserted into the first embedded groove (101b) is exposed to the inner surface of the molding hole (101), the above injection nozzle (300) cuts the head portion (302) to correspond to the shape of the inner surface of the molding hole (101), thereby preventing the head portion (302) from being exposed to the inner surface of the molding hole (101).

[0042] The head portion (302) is cut to correspond to the shape of the inner surface of the molding hole (101), thereby preventing the shape of the head portion (302) from being imprinted on the styrofoam expanded and molded within the molding hole (101).

[0043] The above leg portion (303) is fixedly installed within the first discharge port (101a) by allowing the fastening member (400) to be fastened to its end.

[0044] The gathering hole (303a) of the above leg portion (303) gathers steam or cooling water flowing into the plurality of injection holes (301) and sprays the steam or cooling water toward the molding hole (101).

[0045] The above injection nozzle (300) has screw threads formed on the outer surface of its end so that the fastening member (400) is fastened and fixed in a spiral manner.

[0046] It is preferable that the above injection nozzle (300) has screw threads formed on the outer surface of the end of the leg portion (303).

[0047] The above injection holes (301) are formed in multiple numbers having the same diameter to guide steam or cooling water to be injected into the molding hole (101).

[0048] The fastening member (400) is fastened to the end of the injection nozzle (300) to force the injection nozzle (300) to remain in a state where it is fastened to the first discharge port (101a).

[0049] The above fastening member (400) is fastened to the outer surface of the end of the leg portion (303) of the injection nozzle (300) and is fixed in close contact with the inner wall of the double-walled space opposite to the inner surface of the molding hole (101).

[0050] It is preferable that the above fastening member (400) be fastened in a spiral manner to the outer surface of the end of the leg portion (303).

[0051] The mold for molding styrofoam according to the first embodiment of the present invention, configured as described above, is used as follows.

[0052] First, a spray nozzle (300) is positioned at a first discharge port (101a) formed on the inner surface of a molding hole (101) of an outer mold (100), such that the end of the spray nozzle (300) is exposed through the first discharge port (101a) to the inner wall of a double-walled structure opposite to the inner surface of the molding hole (101).

[0053] At this time, the head portion (302) of the spray nozzle (300) is inserted into the first embedded groove (101b), and the leg portion (303) extending from the head portion (302) is connected through the first discharge port (101a), so that the end of the leg portion (303) is exposed to the wall surface of the inner space of the double-wall structure.

[0054] Here, the head portion (302) is fixedly installed while inserted into the first embedded groove (101b) so as to prevent the head portion (302) from being exposed to the inner surface of the molding hole (101). If a part of the head portion (302) is exposed to the inner surface of the molding hole (101), a part of the head portion (302) is cut with a cutting tool to prevent the head portion (302) from being exposed to the inner surface of the molding hole (101).

[0055] At this time, the head portion (302) cut by the cutting tool is formed to correspond to the shape of the inner surface of the molding hole (101).

[0056] Afterwards, a fastening member (400) is fastened in a spiral manner to the leg portion (303) exposed to the inner space wall surface of the double-wall structure of the outer frame (100), thereby fastening and fixing the spray nozzle (300) to the first discharge port (101a), so that the first discharge port (101a) is closed by the spray nozzle (300), and the spray nozzle (300) is fastened and fixed to a plurality of the first discharge ports (101a) in the same manner as above.

[0057] At this time, the head portion (302) of the spray nozzle (300) is fixedly installed in the first embedded groove (101b), thereby preventing the head portion (302) from rotating in place while fastening the fastening member (400), so that the fastening member (400) can be easily fastened and fixed to the leg portion (303).

[0058] Next, styrofoam raw material is supplied into the molding hole (101) through the open side to seal the molding hole (101), and in that state, steam is supplied through the first supply pipe (102) so that the steam reaches a plurality of first discharge ports (101a) through the internal space of the double-wall structure of the outer mold (100).

[0059] Then, steam is injected into the molding hole (101) through the injection hole (301) of the injection nozzle (300) installed in the first discharge port (101a), and at this time, the styrofoam raw material contained in the molding hole (101) is expanded and deformed by the high-temperature steam, and adheres to the inner surface of the molding hole (101) to be molded to correspond to the shape of the molding hole (101).

[0060] At this time, the steam that enters the injection hole (301) of the head portion (302) is collected within the collection hole (303a) of the leg portion (303) and then sprayed in the direction of the molding hole (101) through the collection hole (303a).

[0061] Here, the styrofoam raw material that expands and deforms within the molding hole (101) is blocked by the spray nozzle (300) that closes the first discharge port (101a), thereby preventing the styrofoam raw material from penetrating into the first discharge port (101a), and accordingly, the blockage of the first discharge port (101a) can be prevented.

[0062] Afterwards, when cooling water is supplied through the first supply pipe (102) while the styrofoam raw material is expanded and deformed within the molding hole (101), the cooling water is sprayed into the molding hole (101) through the spray hole (301) of the spray nozzle (300) installed in the first discharge port (101a), and the cooling water comes into contact with the molded styrofoam. At this time, the molded styrofoam is cooled by the cooling water and maintains a deformed state corresponding to the shape of the molding hole (101).

[0063] And, in the manner described above, the styrofoam raw material is expanded and deformed within the molding hole (101) to obtain the molded styrofoam.

[0064] Meanwhile, if the spray nozzle (300) installed in the first discharge port (101a) is damaged or defective, the fastening member (400) is detached from the leg portion (303) of the spray nozzle (300) in the direction of the inner space wall of the double-wall structure of the outer mold (100), and in that state, the spray nozzle (300) is detached through the first discharge port (101a) in the direction of the molding hole (101).

[0065] Afterwards, the injection nozzle (300) is inserted and coupled through the first discharge port (101a) in the direction of the molding hole (101), so that the end of the leg portion (303) of the injection nozzle (300) is exposed to the wall surface of the inner space of the double-wall structure, and a fastening member (400) is fastened to the end of the leg portion (303) in a spiral manner so that the damaged or broken injection nozzle (300) can be partially repaired.

[0067] [2nd Example]

[0068] In the following description, the same reference numerals are used for components identical to those in the first embodiment, and a detailed description thereof is omitted.

[0069] Referring to FIGS. 6 to 9, the inner mold (200) has a hollow shape and forms an inner mold (201) installed within the molding hole (101) so as to be wrapped around the outer mold (100) at a predetermined distance from the molding hole (101). A plurality of second discharge ports (201a) are formed on the outer surface of the inner mold (201) to spray steam or cooling water in the direction of the molding hole (101). A second supply pipe (202a) is formed on one surface of the inner mold (201) to receive steam or cooling water, and a supply chamber (202) is formed to guide the steam or cooling water to be sprayed into the second discharge ports (201a).

[0070] The inner mold (200) is spaced apart from the molding hole (101) at a predetermined distance so that styrofoam raw material is received between them.

[0071] The inner mold (200) sprays steam through the second discharge port (201a) in the direction of the molding hole (101) so that the styrofoam raw material is molded to correspond to the shape of the inner mold (201).

[0072] The inner mold (200) sprays cooling water in the direction of the molding hole (101) through the second discharge port (201a) to cool the molded styrofoam.

[0073] The inner mold (200) further forms a second embedded groove (201b) formed by recessing on the outer surface corresponding to the second discharge port (201a) to have a diameter relatively larger than the diameter of the second discharge port (201a).

[0074] The second embedded groove (201b) allows the head portion (302) of the injection nozzle (300) to enter, thereby preventing rotation of the head portion (302) and preventing the injection nozzle (300) from being exposed to the inner surface of the molding hole (101).

[0075] It is preferable that the second embedded groove (201b) be formed to correspond to the shape of the head portion (302) of the injection nozzle (300).

[0076] The inner mold (200) sprays steam and cooling water in the direction of the inner surface of the styrofoam raw material contained in the molding hole (101) through the second discharge port (201a).

[0077] The supply chamber (202) receives steam or cooling water through the second supply pipe (202a) and supplies the steam or cooling water in the direction of the second discharge port (201a).

[0078] A spray nozzle (300) is inserted into the first discharge port (101a) from the inner surface of the molding hole (101) of the outer mold (102), and its end is exposed to the inner space wall of a double-wall structure opposite to the inner surface of the molding hole (101), and one end is embedded so as to correspond to the outer surface of the molding hole (101), or is inserted into the second discharge port (201a) from the outer surface of the inner molding mold (201) of the inner mold (200), and its end is exposed to the inner surface opposite to the outer surface of the inner molding mold (201), and one end is embedded so as to correspond to the inner surface of the inner molding mold (201), thereby forming a plurality of spray holes (301) in the central part to guide steam or cooling water to be sprayed into the molding hole (101).

[0079] The above injection nozzle (300) guides the steam or cooling water that has reached the first discharge port (101a) and the second discharge port (201a) to be injected into the molding hole.

[0080] The above-mentioned spray nozzle (300) is fixedly installed in the first discharge port (101a) and the second discharge port (201a) to block the styrofoam raw material being expanded and molded in the molding hole (101) from flowing into the first discharge port (101a) and the second discharge port (201a).

[0081] The above-mentioned spray nozzle (300) is fixed by being embedded within the first embedded groove (101b) so as not to be exposed to the inner surface of the molding hole (101), or inserted and fixed within the second embedded groove (201b) so as not to be exposed to the outer surface of the inner molding die (201), thereby preventing the spray nozzle (300) from rotating in place when the fastening member (400) is fastened, and the head portion (302) is formed extending from the head portion (302), inserted to penetrate the first discharge port (101a) and the second discharge port, allowing the fastening member (400) to be fastened at its end, and formed as a single penetrating portion in the center to communicate with the spray hole (301), thereby forming a gathering hole (303a) that sprays steam in the direction of the molding hole (101).

[0082] It is preferable that the head portion (302) be formed in a polygonal shape and fixed in the first embedding groove (101b) and the second embedding groove (201b).

[0083] The head portion (302) is inserted into the first embedded groove (101b) and the second embedded groove (201b), and is prevented from being exposed to the inner surface of the molding hole (101) and the outer surface of the inner molding mold (201), thereby preventing the shape of the head portion (302) from being imprinted on the styrofoam that expands and deforms between the molding hole (101) and the inner molding mold (201).

[0084] The head portion (302) is fixedly installed within the first buried groove (101b) and the second buried groove (201b) to prevent the leg portion (303) from rotating in place within the first discharge port (101a) and the second discharge port (201a).

[0085] When a part of the head portion (302) inserted into the first embedded groove (101b) is exposed to the inner surface of the molding hole (101) or a part of the head portion (302) inserted into the second embedded groove (201b) is exposed to the outer surface of the inner molding mold (201), the above injection nozzle (300) cuts the head portion (302) to correspond to the shape of the inner surface of the molding hole (101) and the outer surface of the inner molding mold (201), thereby preventing the head portion (302) from being exposed to the inner surface of the molding hole (101) and the outer surface of the inner molding mold (201).

[0086] The head portion (302) is cut to correspond to the shape of the inner surface of the molding hole (101) and the shape of the outer surface of the inner molding die (201), thereby preventing the shape of the head portion (302) from being imprinted on the styrofoam that has been expanded and deformed between the molding hole (101) and the inner molding die (201).

[0087] The above leg portion (303) is fixedly installed within the first discharge port (101a) and the second discharge port (201a) by allowing the fastening member (400) to be fastened to its end.

[0088] The gathering hole (303a) of the above leg portion (303) gathers steam or cooling water flowing into the plurality of injection holes (301) and sprays the steam or cooling water toward the molding hole (101).

[0089] The above injection nozzle (300) has screw threads formed on the outer surface of its end so that the fastening member (400) is fastened and fixed in a spiral manner.

[0090] It is preferable that the above injection nozzle (300) has screw threads formed on the outer surface of the end of the leg portion (303).

[0091] The above injection holes (301) are formed in multiple numbers having the same diameter to guide steam or cooling water to be injected into the molding hole (101).

[0092] The fastening member (400) is fastened to the end of the injection nozzle (300) to force the injection nozzle (300) to remain in a state where it is fastened to the first discharge port (101a) and the second discharge port (201a).

[0093] The above fastening member (400) is fastened to the outer surface of the end of the leg portion (303) of the injection nozzle (300) and is fixed in close contact with the inner wall of the double-walled structure opposite to the inner surface of the molding hole (101), or is fixed in close contact with the inner surface opposite to the outer surface of the inner molding mold (201).

[0094] It is preferable that the above fastening member (400) be fastened in a spiral manner to the outer surface of the end of the leg portion (303).

[0095] The mold for molding styrofoam according to the second embodiment of the present invention, configured as described above, is used as follows.

[0096] First, a spray nozzle (300) is positioned at a first discharge port (101a) formed on the inner surface of a molding hole (101) of an outer mold (100), such that the end of the spray nozzle (300) is exposed through the first discharge port (101a) to the inner wall of a double-walled structure opposite to the inner surface of the molding hole (101).

[0097] At this time, the head portion (302) of the spray nozzle (300) is inserted into the first embedded groove (101b), and the leg portion (303) extending from the head portion (302) is connected through the first discharge port (101a), so that the end of the leg portion (303) is exposed to the wall surface of the inner space of the double-wall structure.

[0098] Here, the head portion (302) is fixedly installed while inserted into the first embedded groove (101b) so as to prevent the head portion (302) from being exposed to the inner surface of the molding hole (101). If a part of the head portion (302) is exposed to the inner surface of the molding hole (101), a part of the head portion (302) is cut with a cutting tool to prevent the head portion (302) from being exposed to the inner surface of the molding hole (101).

[0099] At this time, the head portion (302) cut by the cutting tool is formed to correspond to the shape of the inner surface of the molding hole (101).

[0100] Afterwards, a fastening member (400) is fastened in a spiral manner to the leg portion (303) exposed to the inner space wall surface of the double-wall structure of the outer frame (100), thereby fastening and fixing the spray nozzle (300) to the first discharge port (101a), so that the first discharge port (101a) is closed by the spray nozzle (300), and the spray nozzle (300) is fastened and fixed to a plurality of the first discharge ports (101a) in the same manner as above.

[0101] At this time, the head portion (302) of the spray nozzle (300) is fixedly installed in the first embedded groove (101b), thereby preventing the head portion (302) from rotating in place while fastening the fastening member (400), so that the fastening member (400) can be easily fastened and fixed to the leg portion (303).

[0102] Then, a spray nozzle (300) is positioned at a second discharge port (201a) formed on the outer surface of the inner molding mold (201) of the inner mold (200), such that the end of the spray nozzle (300) is exposed to the inner surface opposite to the outer surface of the inner molding mold (201) through the second discharge port (201a).

[0103] At this time, the head portion (302) of the injection nozzle (300) is inserted into the second embedded groove (201b), and the leg portion (303) extending from the head portion (302) is fastened through the second discharge port (201a), so that the end of the leg portion (303) is exposed to the inner surface of the inner molding mold (201).

[0104] Here, the head portion (302) is fixedly installed while in the state of being inserted into the second embedded groove (201b), thereby preventing the head portion (302) from being exposed to the outer surface of the inner molding mold (201). If a part of the head portion (302) is exposed to the outer surface of the inner molding mold (201), a part of the head portion (302) is cut with a cutting tool to prevent the head portion (302) from being exposed to the outer surface of the inner molding mold (201).

[0105] At this time, the head portion (302) cut by the cutting tool is formed to correspond to the shape of the outer surface of the inner molding die (201).

[0106] Afterwards, a fastening member (400) is fastened in a spiral manner to the leg portion (303) exposed to the inner surface of the inner molding die (201), thereby fastening and fixing the spray nozzle (300) to the second discharge port (201a), so that the second discharge port (201a) is closed by the spray nozzle (300), and the spray nozzle (300) is fastened and fixed to a plurality of the second discharge ports (201a) in the same manner as above.

[0107] At this time, the head portion (302) of the spray nozzle (300) is fixedly installed in the second embedded groove (201b), thereby preventing the head portion (302) from rotating in place while fastening the fastening member (400), so that the fastening member (400) can be easily fastened and fixed to the leg portion (303).

[0108] Next, the outer mold (100) wraps around and seals the outside of the inner mold (200) so that the inner mold (201) of the inner mold (200) is positioned within the molding hole (101) of the outer mold (100).

[0109] At this time, the inner molding mold (201) of the inner mold (200) is allowed to enter the molding hole (101) of the outer mold (100), thereby maintaining the inner molding mold (201) at a predetermined distance from the molding hole (101), so that a space is formed between the molding hole (101) and the inner molding mold (101), and styrofoam raw material is received into this space.

[0110] Subsequently, when the open side of the outer mold (100) is sealed with the inner mold (200), steam is supplied through the first supply pipe (102) and the second supply pipe (202a). The steam supplied through the first supply pipe (102) reaches a plurality of the first discharge ports (101a) through the internal space of the double-wall structure of the outer mold (100), and the steam supplied through the second supply pipe (202a) also reaches the second discharge ports (201a) through the supply chamber (202).

[0111] Then, steam is injected into the molding hole (101) through the injection hole (301) of the injection nozzle (300) installed in the first discharge port (101a), and steam is simultaneously injected into the molding hole (101) through the injection hole (301) of the injection nozzle (300) installed in the second discharge port (201a). At this time, the styrofoam raw material contained between the molding hole (101) and the inner molding mold (201) is expanded and deformed by the high-temperature steam, and is attached to the inner surface of the molding hole (101) and the outer surface of the inner molding mold (201), and is molded to correspond to the shape of the space between the molding hole (101) and the inner molding mold (201).

[0112] At this time, steam entering through the injection hole (301) of the head portion (302) is collected within the collection hole (303a) of the leg portion (303), and then sprayed through the collection hole (303a) into the space between the molding hole (101) and the inner molding mold (201).

[0113] Here, the styrofoam raw material that expands and deforms within the molding hole (101) and the inner molding die (201) is blocked by the spray nozzle (300) that closes the first discharge port (101a) and the second discharge port (201a), thereby preventing the styrofoam raw material from penetrating into the first discharge port (101a) and the second discharge port (201a), and accordingly, blockage of the first discharge port (101a) and the second discharge port (201a) can be prevented.

[0114] Afterwards, when cooling water is supplied through the first supply pipe (102) and the second supply pipe (202a) while the styrofoam raw material is expanded and deformed between the molding hole (101) and the inner molding mold (201), the cooling water is sprayed into the molding hole (101) through the spray hole (301) of the spray nozzle (300) installed in the first discharge port (101a) and the second discharge port (201a), and the cooling water comes into contact with the molded styrofoam. At this time, the molded styrofoam is cooled by the cooling water and maintains a deformed state corresponding to the shape of the space between the molding hole (101) and the inner molding mold (201).

[0115] And, in the manner described above, the styrofoam raw material is expanded and deformed between the molding hole (101) and the inner molding mold (201) to obtain the molded styrofoam.

[0116] Meanwhile, if the injection nozzle (300) installed in the first discharge port (101a) is damaged or defective, the fastening member (400) is detached from the leg portion (303) of the injection nozzle (300) in the direction of the inner space wall of the double-wall structure of the outer mold (100), and in that state, the injection nozzle (300) is detached through the first discharge port (101a) in the direction of the molding hole (101).

[0117] Additionally, if the spray nozzle (300) installed in the second discharge port (201a) is damaged or defective, the fastening member (400) is detached from the leg portion (303) of the spray nozzle (300) in the direction of the inner surface of the inner molding mold (201), and in that state, the spray nozzle (300) is detached through the second discharge port (201a) in the direction of the outer surface of the inner molding mold (201).

[0118] Afterwards, the injection nozzle (300) is inserted and coupled through the first discharge port (101a) in the direction of the molding hole (101), so that the end of the leg portion (303) of the injection nozzle (300) is exposed to the wall surface of the inner space of the double-wall structure, and a fastening member (400) is fastened to the end of the leg portion (303) in a spiral manner so that the injection nozzle (300) of the outer mold (100) that is damaged or broken can be partially repaired.

[0119] And, the injection nozzle (300) is inserted and coupled through the second discharge port (201a) in the direction of the outer surface of the inner mold (201), so that the end of the leg portion (303) of the injection nozzle (300) is exposed to the inner surface of the inner mold (201), and a fastening member (400) is fastened to the end of the leg portion (303) in a spiral manner so that the injection nozzle (300) of the inner mold (200) that is damaged or broken can be partially repaired.

[0120] As described above, the structure in which one end of a spray nozzle (300), which is fixed by a fastening member (400) to the first discharge port (101a) of the outer mold (100) by the fastening member (400), is embedded to correspond to the shape of the inner surface of the molding hole (101) to prevent the shape of the spray nozzle (300) from being imprinted on the molded styrofoam when the styrofoam raw material expands and deforms, is such that the one end of the spray nozzle (300) is embedded to correspond to the shape of the inner surface of the molding hole (101), thereby preventing the spray nozzle (300) from being exposed to the inner surface of the molding hole (101). This prevention of exposure of the spray nozzle (300) prevents the shape of the spray nozzle (300) from being imprinted on the styrofoam molded inside the molding hole (101). Due to the prevention of the imprinting of the spray nozzle (300) shape, the styrofoam molded inside the outer mold (100) can be used as is, thereby shortening the working time. Due to the shortening of the working time Work efficiency and production efficiency are improved simultaneously. In particular, the injection nozzle (300) is fixed to the first discharge port (101a) by a fastening member (400), so that the fastening force is always maintained firmly regardless of repeated steam or cooling water operations.

[0121] The styrofoam molding die according to the present invention described above is not limited to the embodiments described above, and its technical spirit extends to the scope in which any person with ordinary knowledge in the field to which the present invention belongs can make various modifications without departing from the gist of the present invention as claimed in the following claims. Explanation of the symbols

[0122] 100 : Mold 101 : Molding tool 101a: First discharge port 101b: First embankment groove 102 : First supply pipe 200 : Inner formwork 201: Inner molding die 201a: Second discharge port 201b : Second burial groove 202 : Supply chamber 202a : Second supply pipe 300 : Spray nozzle 301 : Spray hole 302 : Head part 303 : Bridge Section 303a : Assembly Area 400 : Fastening member

Claims

Claim 1 An outer mold (100) having a double-walled structure, having one side open to form a molding hole (101) having a predetermined shape inside, having a plurality of first discharge ports (101a) formed on the inner surface of the molding hole (101), and having a first supply pipe (102) formed to receive steam on the side and allow steam or cooling water to be sprayed into the molding hole (101) through the first discharge ports (101a); and a spray nozzle (300) that enters into the first discharge ports (101a) from the inner surface of the molding hole (101) of the outer mold (100), with its end exposed to the inner space wall of the double-walled structure opposite to the inner surface of the molding hole (101), with one end embedded so as to correspond to the inner surface of the molding hole (101), and having a plurality of spray holes (301) formed in the center to guide steam or cooling water to be sprayed into the molding hole (101); The apparatus is composed of: a fastening member (400) which is fastened to the end of the injection nozzle (300) and forces the injection nozzle (300) to remain in a state of being fastened to the first discharge port (101a); and the outer mold (100) further forms a first embedded groove (101b) formed by being recessed on the inner surface corresponding to the first discharge port (101a) to have a diameter relatively larger than the diameter of the first discharge port (101a); the injection nozzle (300) is fixedly embedded within the first embedded groove (101b) so as not to be exposed to the inner surface of the molding hole (101), thereby preventing the injection nozzle (300) from rotating in place when the fastening member (400) is fastened; and a head portion (302) which is extended from the head portion (302) and inserted to penetrate the first discharge port (101a), and at its end the A mold for molding styrofoam characterized by comprising: a leg portion (303) that allows a fastening member (400) to be fastened and is formed as a single through hole in the central portion to communicate with the injection hole (301) and forms a gathering hole (303a) for injecting steam in the direction of the molding hole (101). Claim 2 A mold for molding styrofoam according to claim 1, wherein the outer frame (100) is formed as a single structure or formed so as to be separated from one another, and the molding hole (101) is formed therein. Claim 3 delete Claim 4 A mold for molding styrofoam according to claim 1, wherein the injection nozzle (300) prevents the head portion (302) from being exposed to the inner surface of the molding hole (101) by cutting the head portion (302) to correspond to the shape of the inner surface of the molding hole (101) when a part of the head portion (302) inserted into the first embedded groove (101b) is exposed to the inner surface of the molding hole (101). Claim 5 An outer mold (100) having a double-walled structure, with one side open to form a molding hole (101) having a predetermined shape inside, a plurality of first discharge ports (101a) formed on the inner surface of the molding hole (101), and a first supply pipe (102) formed to allow steam to be supplied to the side and to be sprayed into the molding hole (101) through the first discharge ports (101a); and an inner molding mold (201) having a hollow shape, formed to be installed inside the molding hole (101) so as to be wrapped by the outer mold (100) at a predetermined distance from the molding hole (101), a plurality of second discharge ports (201a) formed on the outer surface of the inner molding mold (201) to spray steam or cooling water in the direction of the molding hole (101), and steam or cooling water supplied to one side of the inner molding mold (201). An inner mold (200) including a supply chamber (202) that forms a second supply pipe (202a) to guide steam or cooling water to be sprayed into the second discharge port (201a); or an inner mold (200) that enters into the first discharge port (101a) from the inner surface of the molding hole (101) of the outer mold (100), with its end exposed to the inner space wall surface of a double-wall structure opposite to the inner surface of the molding hole (101), with one end embedded so as to correspond to the outer surface of the molding hole (101), or an inner mold (201) that enters into the second discharge port (201a) from the outer surface of the inner molding mold (201) of the inner mold (200), with its end exposed to the inner surface opposite to the outer surface of the inner molding mold (201), with one end embedded so as to correspond to the inner surface of the inner molding mold (201), so as to allow steam or cooling water into the molding hole (101) in the central part A mold for molding styrofoam characterized by comprising: a spray nozzle (300) having a plurality of spray holes (301) formed to guide spraying; and a fastening member (400) fastened to the end of the spray nozzle (300) to force the spray nozzle (300) to remain in a state of being fastened to the first discharge port (101a) and the second discharge port. Claim 6 In claim 5, the outer mold (100) further forms a first embedded groove (101b) formed by recessing on the inner surface corresponding to the first discharge port (101a) to have a diameter relatively larger than the diameter of the first discharge port (101a), and the inner mold (200) further forms a second embedded groove (201b) formed by recessing on the outer surface corresponding to the second discharge port (201a) to have a diameter relatively larger than the diameter of the second discharge port (201a), and the injection nozzle (300) is fixedly embedded within the first embedded groove (101b) so as not to be exposed to the inner surface of the molding hole (101), or inserted and fixed into the second embedded groove (201b) so as not to be exposed to the outer surface of the inner molding mold (201), so that when the fastening member (400) is fastened, the injection nozzle (300) A mold for molding styrofoam characterized by comprising: a head portion (302) that prevents rotation in place; and a leg portion (303) that is formed extending from the head portion (302), inserted to penetrate the first discharge port (101a) and the second discharge port, allowing the fastening member (400) to be fastened at its end, and formed as a single penetrating portion in the center to communicate with the injection hole (301), thereby forming a gathering hole (303a) that sprays steam in the direction of the molding hole (101). Claim 7 In claim 6, the injection nozzle (300) is characterized by preventing the head portion (302) from being exposed to the inner surface of the molding hole and the outer surface of the inner molding mold (201) by cutting the head portion (302) to correspond to the shape of the inner surface of the molding hole and the outer surface of the inner molding mold (201) when a part of the head portion (302) inserted into the first embedded groove is exposed to the inner surface of the molding hole or a part of the head portion (302) inserted into the second embedded groove (201b) is exposed to the outer surface of the inner molding mold (201). Claim 8 A mold for molding styrofoam, characterized in that, in either claim 1 or claim 6, the injection nozzle (300) forms screw threads on the outer circumference of its end so that the fastening member (400) is fastened and fixed in a spiral manner.

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