KR20110086437A - Manufacturing apparatus of foam-molding product and manufacturing method thereof - Google Patents

Abstract

PURPOSE: A foamed article manufacturing apparatus and a manufacturing method are provided to efficiently use the energy for producing the heating material by forming a closed space at the minimum space for the foaming. CONSTITUTION: A foamed article manufacturing apparatus comprises first and second molds(110,120), and heating material units(20,30). The first and second molds comprise first and second forming frames(111,121), a plurality of gas inlet holes(111a), a material injecting hole(111b), first and second frames(113,124), and a supply line(114). The first and second forming frames are each other coupled and are formed on the inner side. The gas inlet hole and material injecting hole are at least formed among the first and second forming frame. The first and second frame forms the closed space(115) by surrounding the rearward of the first and second forming frame. The supply line provides the closed space with the heating material for foaming. The heating material feeding unit provides the heating material for foaming with the first and second supply line for foaming the beads in the forming space. The boundary line of micro cell of the outer surface of the foamed article is removed after the foaming completed. The heating material feeding unit provides the heating material of high temperature with the first and second supply line.

Description

Foam molded article manufacturing apparatus and manufacturing method {MANUFACTURING APPARATUS OF FOAM-MOLDING PRODUCT AND MANUFACTURING METHOD THEREOF}

The present invention relates to a foamed molded article manufacturing apparatus and a manufacturing method, and more particularly to a foamed molded article manufacturing apparatus and a manufacturing method that can produce a foamed molded article having a smooth outer surface.

Generally, expanded polystyrene (EPS) products in bead-type foams are most widely used as general-purpose packaging materials.However, as the product is advanced and refined, the quality and safety of product packaging are advanced. The demand for improvement is increasing. As an alternative product that reinforces the physical (brokenness, repeated buffering) vulnerability of EPS products, PP (Polypropylene) resin is used as a raw material, and it has better breakability, repeatable buffering, flexibility, and chemical resistance than EPS. Expanded Polypropylene (EPP) has been developed that has advantages in improving and minimizing packaging volume. Currently, EPS is used for general cushioning packaging, and electronics packaging, automotive parts and structures, etc. EPP is used.

Foams made of beads such as EPS, EPP, etc. as described above are formed in the first molding mold and the first mold in the state of being supplied to the molding space provided between the first molding mold and the second molding mold assembled from both sides. A molding mold which is melted by a heating material such as steam supplied to the molding space through a gas inlet hole provided through each of the molding molds, and at least one molding mold of the first molding mold and the second molding mold faces each other. It is made to be a molded article of a predetermined shape in the molding space while being strongly pressed by moving toward.

However, since the traces of the plurality of gas inflow holes formed in the first mold and the second mold are left on the surface of the molding in the melting / pressing process, the appearance is not beautiful.

In particular, in the case of a sun visor or a car steering wheel used by covering only a thin cover on the outer surface of the molding, the appearance and the texture of the surface are very important because it is directly observed by a human eye or touched by a hand. Traces caused by the gas inlet hole of the molding act as a factor that lowers the value of the product.

In addition, the foamed molded article has a boundary line formed at the welded part between the beads due to the characteristics of the molding by the foaming of the beads. Such a boundary line of the microcell corresponds to the welding line generated when the injection molding comes into contact with each other. Therefore, since the molded foam is not suitable for use for exterior use, it is often used as interior material or for exterior use with a separate case or cover on the outside.

That is, in order to use the foamed molded article for the exterior, a manufacturing process is increased because an additional case or cover is added to the outer surface of the foamed molded article.

In addition, as shown in FIG. 1, the first frame 12 is coupled to the rear of the first molding frame 11, and the second frame 32 is coupled to the rear of the second molding frame 31 so as to provide a closed space 20. 40 is formed, respectively, such a closed space (20, 40) is designed to be larger than necessary than the space required for foam molding not only wastes the energy for the supply of steam, but also has a steam supply device having a capacity more than necessary Since there is a need for facility investment costs increased.

Therefore, an object of the present invention is to solve such a conventional problem, while further increasing the temperature of the second molding die after the foam molding of the foamed molding while melting the outer surface of the foamed molded body in contact with the second mold An object of the present invention is to provide a foam molded article manufacturing apparatus capable of manufacturing a foam molded article having excellent surface hardness as well as a smooth outer surface through a process of increasing the surface density of the foam molded article.

In addition, the fixing plate of the first frame closes the rear space of the first molding frame to form a sealed space, and the closed cover of the second frame closes the rear space of the second molding frame, so that the sealed space is the minimum for foam molding. The present invention provides an apparatus for manufacturing a foamed molded article that can be efficiently used to produce a heating material by forming a space.

The above object, according to the present invention, in the foam molded article manufacturing apparatus, a pair of first molding frame and the second molding frame to provide a molding space inside the male and female coupling, the first molding frame and the second molding frame A gas inlet hole and a raw material inlet hole formed through at least one of the at least one pair, a pair of first frames and second frames surrounding the rear of the first molding frame and the second molding frame to form a sealed space, and the sealing First and second molds each having a supply line for supplying a foaming heating material to the space; And supplying a heating material for foam molding to the supply line of the first mold and the supply line of the second mold so that the beads supplied into the molding space are foam-molded, and melting the outer surface of the foamed body after foaming is completed. A heating material supply unit supplying a heating material for hot surface processing to at least one of the first mold and the second mold in contact with the outer surface of the foamed molding so that the boundary line of the microcell formed on the outer surface of the foamed molding is removed; It is achieved by a foam molding apparatus comprising a.

Here, the heating material supply unit preferably comprises a first supply unit for providing a heating material for foam molding, and a second supply unit for providing a heating material for surface processing.

At least one of the first mold and the second mold surrounds the rear surface of the first mold or the second mold to form an airtight space between the first mold and the second mold, and is supplied to at least one side. It is preferable to further include a sealing cover to which the line is connected.

In addition, the supply line of at least one of the first mold or the second mold on the side to which the high temperature surface heating material is supplied is provided to supply the foaming heating material and the surface processing heating material to the inner sealed space of the airtight cover, respectively. It is preferable that it consists of a 1st supply pipe and a 2nd supply pipe.

In addition, the first frame preferably closes the rear space of the first molding frame to form a closed space on the rear surface of the first molding frame, and preferably further comprises a first fixing plate connected to the supply line on at least one side.

An object of the present invention, in the method of manufacturing a foamed molded article, the first mold and the second mold is moved to engage with each other; And, through the raw material injection hole of the first molding die and the first molding die Supplying beads to a molding space provided between the molding molds; and supplying the heating material for surface processing provided from the first supply part to the closed spaces provided at the rear of the first molding mold and the second molding mold, respectively, Forming a foamed molded product by foaming and maturing the beads; and a closed space provided on the rear surface of the second molding frame with a high temperature surface heating material provided at a temperature higher than the melting point of the molded product from the second supply part after molding the foamed molded product. A surface processing step of supplying to the surface to melt and smoothly process the outer surface of the foamed molded product in contact with the second mold; And leaving the first mold from the second mold and withdrawing the molding of the molding space.

Here, the first mold is pressed toward the second mold together with the supply of the heating material for foam molding in the foam molding step, and the first pressure is provided, and together with the supply of the high temperature surface heating material in the surface processing step. It is preferred to further press the first mold towards the second mold to provide a secondary pressure.

According to the present invention, after the foam molding of the foamed molded article, the temperature of the second mold is further raised to melt the outer surface of the foamed mold in contact with the second mold, while increasing the surface density of the foamed molded article. Provided is a foam molded article manufacturing apparatus capable of producing a foam molded article which is not only smooth but also excellent in surface hardness.

In addition, the fixing plate of the first frame closes the rear space of the first molding frame to form a sealed space, and the closed cover of the second frame closes the rear space of the second molding frame, so that the sealed space is the minimum for foam molding. The present invention provides an apparatus for manufacturing a foamed molded article that can be efficiently used to produce a heating material by forming a space.

1 is a perspective view of a conventional foam mold of the present invention,
2 is a schematic configuration diagram of an apparatus for producing a foamed article of the present invention,
3 is a perspective view of a first mold and a second mold according to the present invention;
4 is a bottom perspective view of the first mold and the second mold according to the present invention;
Figure 5 is a cross-sectional view of the foam molded article manufacturing apparatus of the present invention,
6 to 8 is a functional diagram showing the manufacturing process of the present invention, the molded foam manufacturing apparatus,
9 is a cross-sectional view of the foamed molded article produced by the present invention,
10 is a process flowchart of the method for producing a foamed molded product of the present invention.

Prior to the description, in the various embodiments, components having the same configuration will be representatively described in the first embodiment using the same reference numerals, and in other embodiments, different configurations from the first embodiment will be described. do.

Hereinafter, with reference to the accompanying drawings will be described in detail a foam molded article manufacturing apparatus according to a first embodiment of the present invention.

Figure 2 of the accompanying drawings is a schematic configuration diagram of the apparatus for producing a foamed molded product of the present invention, Figure 3 is a perspective view of the first mold and the second mold according to the present invention, Figure 4 is a first mold and the second mold according to the present invention Is a bottom perspective view of Fig. 5 is a cross-sectional view of the apparatus for producing a foamed molded product of the present invention.

The present invention as shown in the Figure foam forming apparatus manufacturing apparatus is largely composed of a foam mold 10 and the first supply unit 20 and the second supply unit 30 and the first mold 110 and the second mold 120. It is comprised including the supply part which consists of.

The first mold 110 protrudes in the form of a core to form a first molding mold 111 having a plurality of gas inlet holes 111a and raw material injection holes 111b formed on the molding surface, and the first molding mold 111. The first fixing plate 112 to form a closed space 115 in the rear portion of the first molding frame 111 by closing the rear space of the first frame 113 for supporting the first fixing plate 112, A supply line 114 is connected to one side of the first frame 113 and the sealed space 115 behind the first molding frame 111.

The second mold 120 has a second molding die 121 in which a molding surface recessed in the form of a cavity is engaged with the first molding die 111 to form a molding space, and a through hole is formed in the center of the second molding. An airtight space between the second fixing plate 122 supporting the mold 121 and the second molding plate 121 fixed to the second fixing plate 122 to completely cover the rear surface of the second molding frame 121. An airtight cover 123 forming 126, a second frame 124 for supporting the second fixing plate 122, one side surface of the second frame 124, and the second molding frame 121. A supply line 125 is formed to connect the rear closed space 126.

Here, the supply line 125 is a first supply pipe (125a) for supplying the heating material for foam molding to the closed space 126, and a second supply pipe for supplying the heating material for surface processing of the high temperature foam molded object to the sealed space (126) It consists of 125b.

The heating material supply unit has a steam or gas of 160 degrees or more to the supply line 114 of the first mold 110 and the first supply pipe 125a of the second mold 120 to foam / mature the beads supplied to the molding space. High temperature of 256 degrees or more to the second supply pipe (125b) of the second mold 120 to increase the density by melting the outer surface of the molded foam molded body and the first supply unit 20 for providing a heating material for foam molding such as The second supply unit 30 for providing a high temperature surface heating material such as steam, gas, oil.

On the other hand, although not shown in the drawing, the first mold 110 as described above compresses the beads filled in the molding space while moving toward the second mold 120 in the process of foam molding of the beads. It may be desirable to further move in the surface melting process so that the density of the surface of the foamed molded article is effectively increased.

On the other hand, in the present embodiment has been described that the sealing cover 123 surrounding the back of the molding die is formed on the second mold 120 side, but is not limited to this, the first mold side ( It may be formed in the 110, or both in the first mold 110 and the second mold 120.

The operation of the first embodiment of the above-mentioned foamed molded article manufacturing apparatus will now be described.

6 to 8 of the accompanying drawings is a functional diagram showing the manufacturing process of the foam molded article manufacturing apparatus of the present invention, Figure 9 is a cross-sectional view of the foam molded article produced by the present invention, Figure 10 is a process of the foam molded article manufacturing method of the present invention Flowchart.

First, as shown in FIG. 6, the first mold 110 moves toward the second mold 120 so that the first mold 111 and the second mold 121 are assembled with each other (S11). In a state in which a molding space is formed between the mold 111 and the second mold 121, beads are supplied into the mold space through the raw material injection hole 111 b formed in the second mold 121. )

Subsequently, when the foaming heating material provided from the first supply unit 20 is supplied to the closed spaces 115 and 126 of the first mold 110 and the second mold 120, respectively, the supply line of the first mold 110 ( The foaming heating material supplied to the closed space 115 between the first mold 111 and the first fixing plate 112 through the gas inlet 111a provided in the first mold 111 through 114. It is introduced into the molding space is supplied between the beads in the molding space, and through the first supply pipe (125a) of the second mold 120 to the closed space 126 between the second molding die 121 and the sealing cover 123. The supplied surface heating material increases the temperature of the second molding die 121. When the first mold 110 moves toward the second mold 120 and compresses the molding space together with the supply of the surface processing heating material, the molding between the first mold 111 and the second mold 121 is performed. Beads accommodated in the space is foamed and aged to form the appearance of the foamed molding (S13).

When the foaming of the foamed molding is completed as described above, as shown in FIG. 7, the hot surface processing heating material provided by the second supply unit 30 is transferred through the second supply pipe 125b of the second mold 120. Supply to the sealed space 126 provided between the second molding die 121 and the sealing cover 123.

The molding surface of the second molding die 121 is heated by the hot surface processing heating material provided from the second supplying part 30 to melt the surface of the foamed molded body contacting the molding surface of the second molding die 121. In this process, since the boundary lines between the foamed beads and the beads constituting the foamed molded article disappear, and an overall dense outer surface layer is formed, the foamed molded article not only has excellent appearance but also improves the hardness of the outer surface and is not easily damaged. It becomes possible to manufacture (S14).

At this time, although not shown in the figure, the surface of the foamed molded body by additionally moving the first mold 110 toward the second mold 120 and applying pressure to the molding space with the supply of the hot surface processing heating material. It is also desirable to allow the density to increase.

After the molding of the foamed molded product as described above, the temperature of the second molded mold 121 in which the gas inlet hole 111a is not formed is raised to melt the outer surface of the foamed molded product in contact with the second molded mold 121, Through the process of increasing the outer surface is able to manufacture a smooth molded foam.

When the processing of the outer surface is completed through the supply of a heating material for high temperature surface processing, the first molding die 111 and the second molding die 121 are cooled by a separate cooling device, which is not shown. The first mold 110 is separated from the second mold 120, and the foamed molded body in the molding space is withdrawn.

As shown in FIG. 9, the foamed molded product M manufactured as described above has a low density of the inner region M1, and thus has a high appearance due to the high density of the outer surface M2 while maintaining a buffering function of the foamed molded product itself. In addition, it offers the advantage of eliminating the need for a separate exterior cover or coating finish.

In addition, the fixing plate 112 of the first mold 110 forms a closed space 115 by closing the rear space of the first molding frame 110, and the closed cover 123 of the second mold 120 is made of The rear space of the molding die 121 is closed to form an enclosed space 126. The sealed spaces 115 and 126 are the entire space between the first mold and the first frame and the second mold and the first frame as in the prior art. Because it consists of the minimum space for foaming, not the total space between two frames, it provides the advantage of efficiently using the energy required to produce the heating material.

The scope of the present invention is not limited to the above-described embodiment, but may be embodied in various forms of embodiments within the scope of the appended claims. Without departing from the gist of the invention claimed in the claims, it is intended that any person skilled in the art to which the present invention pertains falls within the scope of the claims described herein to various extents that can be modified.

10: foaming mold, 110: the first mold, 111: the first molding frame, 111a: gas inlet hole,
111b: raw material injection hole, 112: fixed plate, 113: the first frame, 114: supply line,
115: enclosed space, 120: the second mold, 121: the second molding frame, 122: fixed plate,
123: airtight cover, 124: second frame, 125: supply line, 125a: first supply pipe,
125b: second supply pipe, 126: enclosed space, 20: first supply, 30: second supply,

Claims (7)

In the molded foam manufacturing apparatus,
A pair of first molding molds and second molding molds, which are formed by coupling male and female to form a molding space therein, a gas inlet hole and a raw material injection hole formed through at least one of the first molding mold and the second molding mold; A first frame having a pair of first frames and a second frame surrounding the rear of the first molding frame and the second molding frame to form a sealed space, and a supply line for supplying a heating material for foam molding to the sealed space, respectively; A mold and a second mold;
By supplying the heating material for foam molding to the supply line of the first mold and the supply line of the second mold so that the beads supplied into the molding space are foam-molded, and melting the outer surface of the foamed molded product after the foam molding is completed, the foamed molded product And a heating material supply unit for supplying a heating material for surface treatment at a high temperature to at least one of the first mold and the second mold in contact with the outer surface of the foamed molded body so that the boundary line of the microcell formed on the outer surface of the molded cell is removed. Foam molded article manufacturing apparatus. The method of claim 1,
The heating material supply unit is a foam molded article manufacturing apparatus comprising a first supply for providing a heating material for foam molding, and a second supply for providing a heating material for surface processing. The method of claim 2,
At least one of the first mold and the second mold surrounds the rear surface of the first mold or the second mold to form an airtight space between the first mold and the second mold, and is supplied to at least one side. Foamed article manufacturing apparatus characterized in that it further comprises a sealing cover is connected to the line. The method of claim 3, wherein
The supply line of at least one of the first mold or the second mold on the side of which the high temperature surface heating material is supplied is a first supply pipe for supplying the heating material for foam molding and the heating material for surface processing to the inner sealed space of the airtight cover, respectively. And a second supply pipe. The method of claim 4, wherein
The first frame forms a closed space on the rear surface of the first molding frame by closing the rear space of the first molding frame, and further comprising a first fixing plate connected to the supply line on at least one side Device. In the method for producing a foamed molded article,
Moving the first mold such that the first mold and the second mold mesh with each other;
Supplying beads to a molding space provided between the first mold and the second mold through the raw material injection hole of the first mold;
Supplying the surface processing heating material provided from the first supply unit to a closed space provided on the rear surface of the first molding frame and the second molding frame, respectively, foaming and aging beads in the molding space to form a foamed molded article;
The outer surface of the foamed molded product contacting the second molded mold by supplying a hot surface processing heating material provided at a temperature higher than the melting point of the molded product from the second supply part after molding the foamed molded product, in contact with the second molded mold. A surface processing step of melting and smoothly processing; And,
And a step of leaving the first mold from the second mold and withdrawing the molding of the molding space. The method of claim 6,
The first mold is pressed toward the second mold together with the supply of the heating material for foam molding in the foam molding step, and the first mold is provided, and the first mold together with the supply of the high temperature surface heating material in the surface processing step. Method for producing a molded article, characterized in that to provide a secondary pressure by further pressing toward the second mold.

Images