JP3541965B2 - Separation and molding equipment for heterogeneous foam beads - Google Patents

Description

[0001]
[Industrial applications]
The present invention relates to a foam molded article, a method for separating and molding different kinds of foam beads, and a molding apparatus therefor. More specifically, a foam molded article obtained by injecting and filling two or more kinds of foam beads individually, and heat-foaming the same. The present invention relates to a molding method and a molding apparatus for molding.
[0002]
[Prior art]
The method and apparatus for molding a foamed molded article using the foamable beads, after filling the foamable beads in a molding die composed of a fixed mold and a movable mold, the foamable beads are heated and foamed by steam, It is to be integrally formed by fusion bonding. In such a molding method, since foaming beads, which are raw material beads, are pressed into the molding die by air, the molding metal is used for the purpose of preventing chipping of corners due to insufficient filling amount. After opening the mold a few mm to improve air bleeding and filling with expandable beads, cracking is performed to clamp the mold. For this reason, only a single kind of expandable beads can be filled simultaneously with the conventional method.
[0003]
However, in recent years, for the purpose of reducing product costs, for example, using a cushioning material for packing as an example, foaming beads with a low expansion ratio are used only in places where a load is applied, and high foaming is performed in other places where a load is not applied. There is a demand for integral molding using foamable beads of a magnification. For this purpose, various studies have been made, for example, Japanese Patent Application Laid-Open No. 54-60366, Japanese Patent Publication No. 58-41736, Japanese Patent Publication No. Sho 59-10296, Japanese Patent Publication No. 60-40372, Japanese Patent Publication No. 61-9136, and Japanese Patent Publication No. 61-58292. And Japanese Patent Publication No. 2-58095 are disclosed.
[0004]
[Problems to be solved by the invention]
However, in each of these inventions, after injecting a certain amount of expandable beads, when the remaining cavity is filled with another type of expandable beads, or when filling one type of expandable beads, the expansion of the expandable beads is prevented. A cavity is formed by some method so that the inside of the molding die is not filled with the sex beads, and then the cavity is filled with another type of expandable beads. Therefore, the obtained foamed molded article has a structure in which the foamed article is partially divided into two parts by different kinds of foams, and thus the product cost cannot be sufficiently reduced. In addition, in some of these molding methods, it is almost impossible to stably form a desired portion of a foam molded article into a predetermined shape or structure with a different kind of foam.
[0005]
The inventor of the present invention has conducted intensive studies on a molding method for forming a desired portion of a foamed molded article with a different kind of foam. As a result, the inventor of the present invention has conceived the method of the present invention. To obtain a foam molded article having the following.
[0006]
[Means for Solving the Problems]
The apparatus for separating and molding different types of expandable beads according to the present invention is an apparatus for molding expandable beads by filling expandable beads into a mold having a core vent and then heating and expanding the expandable beads. At least one suction-adhering portion for suction-adhering the foaming beads to at least a desired portion of the molding die; suction means for sucking the foaming beads through the suction-adhering portion; A heating means for supplying the suction means or the heating means to the suction attachment part, and a raw material filling machine for sequentially injecting and filling two types of expandable beads into a molding die, An electromagnetic valve connects the suction unit to the suction attachment section, and the raw material filling machine injects one of the two types of expandable beads into the molding die, and performs the suction. Means for the suction adhesion By sucking the air in the molding die from above, the one kind of foam beads is attached to the suction attachment part, and while the one kind of foam beads is sucked by the pull attachment part, the raw material filling machine is used. However, different kinds of foaming beads of the two kinds of foaming beads are injected into the molding die, the heating means is connected to the suction attachment section by the electromagnetic valve, and heated steam is supplied to the suction attachment section. The two types of expandable beads injected into the molding die are heated by being supplied from the core vent into the molding die.
[0012]
[Action]
The foam molded article according to the present invention is configured such that the skin portion of a desired portion is formed of one or more foams different from the foam constituting the main part of the foam molded article. That is, as the skin portion of the desired portion, for example, by forming the outer peripheral contour portion and a part of the side wall of the container with a foam having a lower foaming ratio than the foaming ratio of the foam constituting the main portion, a high foaming ratio can be obtained. A foam molded article having a skin portion structured by a strong foam can be obtained. Also, by forming a desired shape by using a foam having a different color on a side wall, for example, as a skin portion of a desired portion, characters and figures can be drawn, and these characters and the like do not disappear due to wear and the like. Absent.
[0013]
Next, the method for separating and molding different kinds of expandable beads according to the present invention is configured so that the expandable beads can be attached to one or more desired portions of a molding die. A predetermined amount of beads is injected into a molding die and adhered to a desired site. Next, another type of expandable beads are injected into the molding die, and the remaining portions other than the one type of expandable beads attached to the desired site are filled. At this time, among the one type of expandable beads, the expandable beads that have not been attached to the desired site are mixed with the other types of expandable beads when filled with other types of expandable beads. , Will be scattered. Thereafter, the two types of expandable beads in the molding die are heated and foamed by a heat medium such as high-temperature steam blown into the molding die and fused, whereby a foam molded article is integrally formed.
[0014]
Further, another separation molding method of the different kind of expandable beads according to the present invention is configured so that the expandable beads can be sequentially and selectively attached to a plurality of desired portions of a molding die, Is injected into a molding die in a predetermined amount and adhered to the desired site, and the adhesion is maintained. Next, a predetermined amount of another type of expandable beads is injected into a molding die and adhered to a desired site different from the above, and the adhesion is maintained. After repeating this process, another type of expandable beads different from the injected expandable beads is injected into the molding die and the remaining portion is filled. Thereafter, the plurality of types of expandable beads filled in the same manner as described above are heated and foamed to integrally form a foam molded article.
[0015]
Further, in the method for separating and molding the different kinds of expandable beads, the expandable beads are configured to be suction-adhered to a desired portion of the molding die by a suction force, and the suction-adhesion is performed by appropriately adjusting the suction force. The amount of foam beads attached can be adjusted arbitrarily. Therefore, the strength of the obtained structured foam molded article can be arbitrarily adjusted. Also, in adjusting the suction force stepwise and strongly, by changing the type of foamable beads to be suction-adhered, foamable beads of different types can be adhered in layers. Therefore, a foam molded article in which foams of different types having different skin portions at desired locations form a layer is obtained.
[0016]
Next, the apparatus for separating and molding different kinds of expandable beads according to the present invention is provided with a suction attachment section, a suction means, and a means for sequentially injecting and filling two or more kinds of expandable beads. A predetermined amount of one kind of expandable beads is injected by the injection and filling means while the air in the molding die is sucked through the suction attachment portion by means, and the expandable beads are attached to the suction attachment portion. Next, another foaming bead is injected and filled into the remaining space in the molding die while the foaming bead is adhered to the suction attachment portion. Thereafter, the two types of expandable beads filled in the molding die are heated and foamed and fused by a conventional method to obtain an integrally molded foam molded product.
[0017]
Furthermore, the apparatus for separating and molding different kinds of expandable beads according to the present invention includes a plurality of suction adhesion sections, a suction unit for dividing the plurality of suction adhesion sections and sequentially suctioning the suction adhesion sections, and two or more types of foam beads. Means for sequentially injecting and filling, one kind of foaming beads by the injecting and filling means while sucking the air in the molding die through the first suction attachment portion divided by the suction means. Is injected in a predetermined amount, and the expandable beads are attached to the first suction attachment portion. Next, while the foamable beads are adhered to the first suction-adhered portion, the air in the molding die is suctioned through the second suction-adhered portion by the suction device, and another one of the foamable beads is injected by the filling device. A predetermined amount of beads is injected, and the expandable beads are attached to the second suction attachment portion. After repeating this step as needed, the foaming beads are adhered to these suction attachment portions, and the other foaming beads are injected and filled into the remaining space in the molding die. Thereafter, two or more types of expandable beads filled in a molding die are heated and foamed and fused by a conventional method to obtain an integrally molded foam molded article.
[0018]
【Example】
Next, embodiments of a foam molded article, a method for separating and molding different types of foam beads according to the present invention, and the molding apparatus will be described in detail with reference to the drawings.
[0019]
Fish boxes and vegetable boxes used for transporting fish and vegetables while maintaining them at a substantially constant temperature and a constant humidity mainly use foam molded articles having excellent properties such as heat insulation and airtightness. Such a foamed product such as a fish box forms a container having a side wall and a bottom. As shown in FIG. 1, an example of the foamed product 10 is obtained by heating foaming foamable beads in a molding die. The foam molded article 10 is composed of a foam 12 forming a main portion and a foam 14 forming a skin portion of a predetermined portion.
[0020]
In the present embodiment, as the foam 12 forming the main part, foam beads having a high expansion ratio, which are excellent in flexibility and heat insulation and are inexpensive, are used, and the foam forming the skin portion of a predetermined portion is used. Reference numeral 14 is formed by using expandable beads having a low expansion ratio and having characteristics such as high strength and high hardness. Here, as shown in FIG. 1, the skin portion (14) of the predetermined portion has one or both of the outer surface and the inner surface thereof in a grid or in order to improve the strength of the side wall or the bottom of the container. A foam having a low expansion ratio for reinforcing the end portion of the container side wall which is linearly formed or fitted with the lid, the bottom portion where the container is overlapped with the container, and the corner portion between the side wall and the bottom for reinforcement 14. With such a configuration, the foam molded article 10 such as a container can reinforce and structure only the skin portion at a predetermined location requiring strength and the like, and the inexpensive foam molded article 10 can be obtained.
[0021]
The foam molded article (10) having such a configuration is molded by, for example, a molding apparatus 16 and a molding method as shown in FIG. That is, the molding device 16 is composed of a fixed side 18 and a movable side 20, and the fixed side 18 is a fixed mold 22, a first raw material filling machine 24, a second raw material filling machine 26, a steam supply port 28, a cooling water pipe. The movable side 20 includes a movable mold 32, a steam supply port 34, a cooling water pipe 36, and the like. The fixed mold 22 and the movable mold 32 are provided with a large number of core vents (not shown), and the fixed mold 22 is further provided with a suction attachment section 38 at a preset position.
[0022]
Here, differences from the conventional molding apparatus will be described. First, the first raw material filling machine 24 and the second raw material filling machine 26 are for injecting and filling different types of expandable beads into the cavity 40 formed by the fixed mold 22 and the movable mold 32, respectively. For example, after injecting a certain amount of the first expandable beads into the cavity 40 by the first raw material filling machine 24, the second expandable beads are injected into the rest of the cavity 40 by the second raw material filling machine 26. It is configured to be filled. Therefore, between the first raw material filling machine 24 and the hopper storing the first expandable beads, there is provided a weighing device for measuring the first expandable beads to be injected based on weight, volume, flow rate, or the like. Preferably, they are provided. It is preferable that, for example, foam beads having a low foaming ratio are used as the first foam beads, and foam beads having a high foam ratio, for example, are used as the second foam beads. As the expandable beads of No. 2, those having different particle diameters, colors, materials and the like are used.
[0023]
Next, as shown in an enlarged manner in FIG. 3, the suction / attachment portion 38 provided at a preset position of the fixed die 22 is provided with a core vent 42 having a large number of pores or slits formed in a predetermined position and range. Are arranged in a large number. On the other hand, a chamber 44 is formed on the back side of the core vent 42 constituting the suction attachment section 38, and the chamber 44 is provided with a suction unit 48 such as a vacuum pump via an electromagnetic valve 46 and a heating medium such as heated steam. And a heating means 50 for supplying
[0024]
The molding device 16 according to the above configuration is operated as follows. First, the fixed mold 22 and the movable mold 32 are matched with each other to form a cavity 40 for forming a foam molded product (10). Next, a core vent constituting the suction attachment portion 38 through the chamber 44 by the suction means 48. While sucking the air in the cavity 40 from 42, the first foamable beads 52 are injected from the first raw material filling machine 24 by a substantially constant amount. The first foamable beads 52 injected into the cavity 40 are suction-adhered by the suction force from the core vent 42, and the suction-adhered portion 38 is filled with the first foamable beads 52. At this time, the first expandable beads 52 that cannot adhere to the suction attachment section 38 fall to the bottom in the cavity 40.
[0025]
Next, while the air in the cavity 40 is exhausted from a core vent (not shown) provided in the fixed mold 22 and the movable mold 32 while maintaining the suction and attachment of the first foamable beads 52, the second raw material filling machine 26 The second expandable beads are injected and filled in the cavity 40. The second expandable beads are filled in portions except for the first expandable beads 52 attached to the suction attachment portion 38, and at this time, they cannot adhere to the suction attachment portion 38 and A part of the dropped first foamable beads 52 will mix with the second foamable beads.
[0026]
Thereafter, the solenoid valve 46 is switched to supply the heating steam from the core vent 42 into the cavity 40 through the chamber 44 by the heating means 50, and from the steam supply ports 28 and 34 provided on the fixed side 18 and the movable side 20. Heating steam is supplied to heat the fixed mold 22 and the movable mold 32, and at the same time, heating steam is supplied into the cavity 40 from a core vent (not shown) provided in the molds 22 and 32, so that the first expandable beads are formed. 52 and the second expandable beads are simultaneously heated and foamed, and are integrally fused and formed. Then, after the supply of the heating steam is stopped, cooling water is applied to the fixed mold 22 and the movable mold 32 from the cooling water pipes 30 and 36 after a lapse of a predetermined time, and the mold is opened. The foam molded article (10) molded by the above is taken out.
[0027]
The obtained foam molded product (10) has an arbitrary shape and structure corresponding to the shapes of the fixed mold 22 and the movable mold 32 and the position shape of the suction attachment section 38. In particular, when the suction force at the suction attachment portion 38 is weak, the amount of the first expandable beads 52 attached to the suction attachment portion 38 is reduced, and thus the foam 14 of the skin portion formed by the first foamable beads 52 is reduced. The thickness decreases. Conversely, when the suction force at the suction attachment portion 38 is strong, the amount of the first expandable beads 52 attached to the suction attachment portion 38 increases, so that the foam of the skin portion formed thereby is formed. 14 becomes thicker. In this way, by appropriately adjusting the suction force of the suction means 48, the amount of the first expandable beads 52 to be attached to the suction attachment portion 38 is adjusted, and thus the thickness of the skin portion made of the different kinds of foams 14 is adjusted. Can be changed. That is, this makes it possible to appropriately set the strength of the formed foam molded article.
[0028]
In the above embodiment, after filling the expandable beads, the electromagnetic valve 46 is switched to supply the heated steam from the suction attachment portion 38, but the present invention is limited to the above embodiment. is not.
[0029]
For example, in the above-described embodiment, after filling the expandable beads, the electromagnetic valve 46 is switched to supply the heated steam from the suction attachment portion 38, but this is not always necessary. A configuration may be adopted in which heating air supplied from another core vent (not shown) is guided only by sucking the air in the cavity 40, and thereby the first expandable beads 52 are heated and foamed. In such a case, it goes without saying that the solenoid valve 46 is not required.
[0030]
Further, in the foam molded article 10 shown in FIG. 1, a fitting portion 54 of the foam molded article 10 which is a container, which is formed at an end of a side wall of the foam molded article 10, and a container formed at the outer peripheral portion of the bottom and the container. The fitting part 56 for keeping the airtightness by overlapping the foamed beads is not easily filled with the foaming beads in the molding die, so that it is easy to be chipped, and it is easy to be deformed or damaged when the foamed molded product 10 is used. . Therefore, as shown in FIG. 1, it is preferable to form the fitting portions 54 and 56 using strong beads, for example, expandable beads 52 having a low expansion ratio.
[0031]
In order to form a foam molded article having such a structure, it is preferable to provide a suction attachment portion 58 for suctioning and attaching the first expandable beads 52 having a low expansion ratio, as shown in FIG. The suction attachment portion 58 may be formed not only by the core vent 42 but also by appropriately arranging pores 60 or slits as shown in FIG. Further, in order to suck air from the plurality of core vents 42, the chamber 44 may be provided as described above to collectively suck the air. However, as shown in FIG. The pipe 62 may be provided so as to individually suction air.
[0032]
Further, the foam molded article according to the present invention is not limited to a container, but can be applied to any foam molded article. For example, as shown in FIG. 5, it can be applied to a bumper 64 for an automobile. is there. In the case of the bumper 64, it is preferable that the portion 66 to which the impact is most likely to be applied or the portion (66) which is easily damaged is formed of, for example, a foam having high strength and a low expansion ratio, or a material having high viscosity (elongation).
[0033]
As described above, the foam molded article according to the present invention is characterized in that the skin portion of a desired site is formed by one or more kinds of foams different from the foam constituting the main part of the foam molded article. The shape of the skin portion of the portion is, for example, a line shape, a lattice shape, a planar shape, or the like, thereby forming a skeleton of the foam molded product, and it is possible to dramatically improve the strength. On the other hand, the skin portion of the desired portion can be configured as a character, a symbol, a graphic, or the like, for example, which is displayed on the side surface of the foamed molded product, in addition to the purpose of reinforcement or the like.
[0034]
For example, as shown in FIG. 6, the characters 72 can be drawn on the side surface of the foam container 68 with foams 70 of different colors, and similarly, symbols, other figures, or patterns can be drawn. Such characters 72 and symbols can also be formed by arranging the core vents 42 and forming the suction attachment portion 38 into the shape of the characters 72 or the like as in the above-described embodiment. However, when the character 72 or the like is formed with such a configuration, the outline of the character 72 or the like may not be clear or the line width of the character 72 or the like may not be substantially constant. Such a case can be solved by configuring the molding die as follows.
[0035]
That is, as shown in FIG. 7, it is preferable that the core vent 42 is arranged in a shape such as a predetermined character on the side surface of the fixed mold 74, and the outer peripheral portion is surrounded by the convex shape 76 to form the suction attachment portion 78. With such a configuration, a substantially uniform suction force is obtained on the inside of the suction attachment portion 78 surrounded by the convex shape 76, and since the foaming beads hardly protrude outside the convex shape 76 and are attached by suction, As shown in FIG. 7B and FIG. 6, a character 72 with a clear outline is obtained.
[0036]
In addition, when forming some characters of a plurality of characters and symbols in a different color, forming a color-coded pattern, or forming a skeletal structure for reinforcement, for example, in other places. In the case where a skin layer having a high buffering property is formed, it is necessary to attach at least two or more types of expandable beads to a predetermined suction attachment portion. In order to mold such a foam molded article, for example, as shown in FIG. 8, a molding die 80 is provided with a first suction-adhering portion 82 and a second suction-adhering portion 84, each of which is sequentially and continuously. The first foaming beads 88, the second foaming beads 90, and the third foaming beads 92 are switched from the raw material filling machine 86 to the respective cavities by switching the electromagnetic valves 94. This can be achieved by a molding device 96 configured to be capable of being injected into 40. Reference numeral 98 in the figure is a weighing device.
[0037]
According to the molding device 96, first, a substantially constant amount of the first expandable beads 88 is injected from the raw material filling machine 86 while sucking the air in the cavity 40 from the first suction attachment portion 82. The suction is made to adhere to the suction attaching section 82. Thereafter, while maintaining the adhesion of the beads 88 and sucking the air in the cavity 40 from the second suction adhesion section 84, the electromagnetic valve 94 is switched so that the second foamable beads 90 are substantially moved from the raw material filling machine 86. A fixed amount is injected, and is suction-adhered to the second suction-adhering portion 84. Next, the third expandable beads 92 are injected and filled from the raw material filling machine 86 by switching the electromagnetic valve 94 while discharging the air in the cavity 40 from the entire molding die 80. When injecting the third expandable beads 92, cracking may be performed. Then, the beads 88, 90, and 92 are heated and foamed by an ordinary method, and the foam molded article is integrally fusion-molded.
[0038]
Further, in the above-described molding apparatus 96, it is possible to further provide third, fourth,... Suction attachment sections, and to suction and attach different types of foamable beads to the respective sections. With the above molding apparatus and molding method, it is possible not only to form a foam molded product having a color-coded pattern on the surface, but also to produce a foam molded product in which foams having partially different properties are integrally formed. can do.
[0039]
For example, as shown in FIG. 9, the inner surface of the foam container 100 is formed of a foam 102 having a high expansion ratio or a foam made of a material having a high flexibility, and a part of the bottom surface is formed of a foam 104 having a low expansion ratio. Alternatively, it can be formed of a foam made of a material having high rigidity. Such a foam container 100 is suitable for transporting electronic devices and fine and sophisticated glass products that are easily broken by vibration or the like.
[0040]
As shown in FIG. 10, the cushioning member 108 for transporting the heavy object 106 is formed of a foam 110 having a low expansion ratio at a portion where the heavy object 106 easily contacts and deforms. A portion having a high foaming ratio, such as a foam 112, can be formed at a portion which is likely to be in contact with the floor surface and damage the floor surface.
[0041]
Next, as shown in FIG. 11, for example, as shown in FIG. 11, a filter 116 having a predetermined shape is provided so as to protrude into the cavity 40 of the molding die 114, and the surface of the filter 116 is provided. After the first expandable beads 118 are attached by suction, the second expandable beads can be injected and filled to form the first expandable beads. When the filter 116 is cut off from the molding die 114 and embedded in the foamed molded product after the molding of the foamed molded product, a cavity can be formed in the foamed molded product.
[0042]
Furthermore, by changing the suction force at the suction attachment portion to, for example, two stages, a foam molded article having a three-layer structure can be formed. That is, the suction force of the suction adhesion portion is set to be weak, and the first foamable beads are first suction-adhered. Then, the suction force of the suction adhesion portion is strongly changed, and the second foamable beads are suction-adhered. Thereafter, the third expandable beads are injected and filled by a conventional method, and foamed. According to such a method, for example, as shown in FIG. 12, a foam molded article in which a foam 120 having a low expansion ratio, a foam 122 having a high expansion ratio, and a foam 124 having an intermediate expansion ratio are integrally formed. 126 is obtained. The foam molded article 126 can be configured such that the vibration received by the foam 120 or the vibration received by the foam 124 is absorbed by the foam 122 having a high expansion ratio.
[0043]
In this manner, the skin portion of the desired portion is separated from the foam constituting the main portion, and a foam molded article formed of one or more different foams is integrally formed in one molding step. It is possible to mold, and it is possible to manufacture inexpensively foamed molded products having various forms and high added value. In particular, the material, particle size, hardness, strength, color, etc. of the foam constituting the skin portion of the desired portion should be changed and set to the foam constituting the main portion in accordance with the use of the foam molded article. This makes it possible to provide a foam molding product that has never been seen before.
[0044]
As described above, various embodiments of the present invention have been described based on the drawings, but it is needless to say that the present invention is not limited to these illustrated embodiments. For example, in the above-described embodiment, when injecting the expandable beads forming the skin portion of the desired site, the injection amount of the expandable beads was measured so as to be substantially constant. After injecting the expandable beads, the excess expandable beads not adhering to the suction adhering portion may be suction-removed from the cavity. By removing excess foaming beads, it is possible to prevent mixing with other kinds of foaming beads.
[0045]
In addition, the material of the expandable beads used in the present invention is not particularly limited, and any material that can be used for so-called bead fusion molding can be used. In addition, the foamed molded article according to the present invention, the method for separating and molding different types of foamed beads, and the molding apparatus do not depart from the gist of the present invention. Among them, various improvements, modifications, and variations can be made based on the knowledge of those skilled in the art.
[0046]
【The invention's effect】
The foam molded article formed by the apparatus for separating and molding different kinds of foamed beads according to the present invention is a kind in which a skin portion of a desired portion is separated from a foam constituting a main part of the foam molded article and is different therefrom. Or, since it is formed and formed of two or more kinds of foams, as a skin portion of a desired portion, for example, the outer peripheral contour portion or a part of a side wall of the container is determined by the expansion ratio of the foam material constituting the main portion. By using a foam having a low expansion ratio, a foam molded article having a skin portion structured by a high-strength foam can be obtained. Also, by forming a desired shape by using a foam having a different color on a side wall, for example, as a skin portion of a desired portion, characters and figures can be drawn, and these characters and the like do not disappear due to wear and the like. Absent.
[0047]
Next, according to the apparatus for separating and shaping different kinds of expandable beads according to the present invention, it is configured so that the expandable beads can be attached to one or more desired portions of a molding die, and the expandable beads are sequentially formed. Is injected into the molding die and adhered to the desired portion, so that the foamed beads that have been adhered and other foamable beads do not mix with each other, and are separated from each other. To form a foam molded article integrally. Further, by configuring so that the expandable beads can be sequentially and selectively attached to a plurality of desired portions of the molding die, two or more kinds of the expandable beads can be separated into desired portions in the molding die. Can be attached. Therefore, the obtained foam molded article is integrally molded with a skin portion made of a foam having the required properties and properties at a desired site.
[0048]
Further, according to the apparatus for separating and molding different kinds of foaming beads, the foaming beads are configured to be suction-adhered to a desired portion of the molding die by a suction force, and the suction force is appropriately adjusted so that the suction adhesion is performed. It is possible to arbitrarily adjust the amount of foamable beads to be adhered, and arbitrarily adjust the strength of the structured foam molded article. Alternatively, by sequentially adjusting the suction force and separating and injecting two or more types of expandable beads, a foam molded product in which foams having different properties are formed in layers from the skin portion to the inside is formed. can get.
[Brief description of the drawings]
FIG. 1 is a fragmentary perspective view showing an embodiment of a foam molded product according to the present invention.
FIG. 2 is an explanatory cross-sectional view of a main part of an embodiment of the apparatus for separating and molding different kinds of expandable beads according to the present invention.
FIG. 3 is an explanatory cross-sectional view of a main part for describing an operation of the separation molding apparatus shown in FIG. 2;
FIG. 4 is an explanatory sectional view of a main part showing another embodiment of the apparatus for separating and molding different kinds of expandable beads according to the present invention.
FIG. 5 is a fragmentary perspective view showing another embodiment of the foam molded product according to the present invention.
FIG. 6 is a fragmentary perspective view showing another embodiment of the foam molded product according to the present invention.
FIG. 7 (a) is a cross-sectional view of a main part showing another embodiment of the apparatus for separating and molding different kinds of expandable beads according to the present invention, and FIG. 7 (b) is a sectional view showing the separation apparatus shown in FIG. It is sectional explanatory drawing which shows the principal part of the foaming molded article shape | molded by the shaping | molding apparatus.
FIG. 8 is an explanatory sectional view of a main part showing another embodiment of the apparatus for separating and molding different kinds of expandable beads according to the present invention.
FIG. 9 is an explanatory sectional view of a main part showing another embodiment of the foam molded product according to the present invention.
FIG. 10 is an explanatory sectional view of a main part cutaway showing another embodiment of the foam molded article according to the present invention.
FIG. 11 is an explanatory sectional view of a main part showing another embodiment of the apparatus for separating and molding different kinds of expandable beads according to the present invention.
FIG. 12 is a fragmentary cross-sectional explanatory view showing another embodiment of the foam molded article according to the present invention.
[Explanation of symbols]
10, 126; foam molded article
12; foam
14, 70, 102, 104, 110, 112, 120, 122, 124; foam forming skin portion
16, 96; molding equipment
22, 74; fixed type
24, 26, 86; Raw material filling machine
32; movable type
38, 58, 78, 82, 84; suction attachment part
40; cavity
42; core vent
48; suction means
50; heating means
52, 88, 90, 92, 118; expandable beads
60; pores (suction attachment part)
64; bumper (foam molded product)
68,100; Foam container (foam molded product)
80,114; Mold
98; weighing device
108; cushioning member (foam molded product)
116; filter

Claims (1)

After filling the expandable beads into a molding die having a core vent , the expandable beads are heated and foamed, and in an apparatus for molding a foamed molded product,
At least one or more suction-adhering portions for suction-adhering the foaming beads to at least a desired portion of the molding die; suction means for sucking the foaming beads through the suction-adhering portions; A heating means for supplying the suction means or the heating means to the suction attachment portion, a raw material filling machine for sequentially injecting and filling two types of expandable beads into a molding die,
The solenoid valve connects the suction unit to the suction attachment portion, the raw material filling machine injects one of the two types of expandable beads into the molding die,
The suction means causes the one kind of foam beads to adhere to the suction attachment portion by sucking air in the molding die from the suction attachment portion,
The raw material filling machine injects different types of expandable beads of the two types of expandable beads into the molding die while sucking the one type of expandable beads at the pulling attachment portion,
The heating means is connected to the suction attachment portion by the solenoid valve , and heating steam is supplied from the suction attachment portion and the core vent into the molding die, whereby the heating means is injected into the molding die. An apparatus for separating and molding different kinds of expandable beads, wherein the seed expandable beads are heated.

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