KR20070096756A - Method for manufacturing crosslinked form - Google Patents

Abstract

A method for manufacturing a foam is provided to form a foam having a pattern with a predetermined color, physical properties or a predetermined shape with no need of separate adhesion process or painting process. A method for manufacturing a foam comprises the steps of: processing a body portion molding material with a predetermined shape in a state of inhibiting a crosslink-foaming, at least one pattern portion molding material(16) with a predetermined shape and a shell portion molding material(14), respectively; combining the pattern portion molding material to one side of the shell portion molding material; mounting the one side of the shell portion molding material combined with the pattern portion molding material, closely onto an internal surface of a mold with a predetermined shape and then mounting the body portion molding material into a space formed by the other side of the shell portion molding material, on which the pattern portion molding material is not combined; and sealing the mold and cross-link foaming the molding materials simultaneously.

Description

Method for manufacturing crosslinked form

Figure 1a is a working view for coupling the patterned molding material to the outer skin molding material in accordance with the present invention.

Figure 1b is a combined configuration of the pattern portion molding material and the outer skin molding material according to Figure 1a.

Figure 1c is a cross-sectional view taken along the line A-A 'of FIG.

Figure 2 is a working relationship of foaming the molding materials using a mold as an embodiment according to the present invention.

Figure 3 is a working relationship of foaming the molding materials using a mold as another embodiment according to the present invention.

Figures 4a to 4c each of the various configurations of the foam produced in accordance with the present invention.

Explanation of symbols on the main parts of the drawings

12 body molding material 14 outer skin molding material

16: pattern forming material 100: foam

160, 180: foam pattern

Republic of Korea Patent Publication No. 2002-0085143

The present invention relates to a method for producing a cross-linked foam, and more particularly, in the implementation of a foam having an arbitrary shape, a manufacturing method capable of forming a foam pattern of any shape made of various physical properties on the surface of the foam in one foaming process. It is about.

Foam products obtained by crosslinking and foaming various resins such as polyethylene (PE) or ethylene vinyl acetate (EVA) are widely used throughout the industry. These foam products have low specific gravity, excellent resilience and shock absorption. However, due to the advantage that the shape can be formed as intended by using a specific mold, its use range is gradually expanding.

If a variety of foam products are on the market, it is determined that each foam product has a very different function. Therefore, it is important for consumers to purchase the product. Whether it can be differentiated. To this end, companies producing foamed products are attempting various methods to give foamed products a visual effect that can be differentiated from other products in order to secure competitiveness.

One of the most common ways of imparting a visual effect to foams is to form foams of different colors or unusual shapes individually, and then to bond them together using separate adhesive means to achieve the final foam It is to have a different color or to be able to express a variety of patterns for each part. However, this method is a tool for molding because foams of different colors or shapes must be manufactured individually for a specific part, and the manufacturing cost for producing one final foamed product is too high as the number of expensive molds inevitably increases. There is a problem, and as the color or shape of the foam to be implemented is diversified, there is a problem that the productivity of the product is significantly lowered as the process to be added is added at the same time. Moreover, the sense of unity of the final foamed product can be remarkably degraded in that the foams individually bonded to each other by bonding means can be degraded, and the bonding surfaces can be separated from each other by actual long-term use, which deteriorates the durability of the foam. There is also.

Another method is to paint a specific color or a specific shape by using ink or paint on a specific portion of the outer surface of the foam or the entire outer surface of the foam to be given a visual effect. However, this method has a problem of low product productivity in that there are too many process steps that must be passed in order to apply the liquid coating material having high flowability within a specific portion or section. Moreover, due to the uniqueness of painting, this method may produce a large number of defective products depending on the level of proficiency. Even if the painting is completed completely, the coating film formed on a specific part of the surface of the foam may be inadvertently handled or worn with other objects. The color could be transferred or contaminated by friction and contact, so there was always a possibility that the product would be further rejected.

An example of the technology proposed to improve the problems of the prior art is Korean Patent Publication No. 2002-0085143. This technique essentially breaks the traditional method of making foams individually and then bonding them together to give the foam a visual impact, or separately painting the foam surface in any shape and color. Thus, the technical characteristics of the foam, which is implemented as a single foaming process, provide a method in which each part of the foam is made of different colors and physical properties or expresses various shapes. However, since this technique was primarily a technical concern about which part or material to be formed in the overall composition of the foam, only the surface portion of the foam is considered, not the overall composition of the foam. There is a disadvantage in that the process is somewhat complicated to work by applying this directly.

The present invention has been proposed to solve the above problems, it is possible to form a foam pattern made of any color or physical properties, or any shape on the surface of the foam to be implemented even without a separate bonding process or coating process It is an object to provide a method for producing a foam.

In order to achieve the above object, the present invention provides a method for producing a foam, wherein at least one pattern portion formed of a body portion molding material having an arbitrary shape as a state in which crosslinked foam is suppressed and in an arbitrary shape as a state in which crosslinked foam is suppressed. Processing each of the outer skin molding materials in a state in which the molding materials and crosslinked foaming are suppressed; Coupling the pattern forming material to one surface of the outer skin forming material; The body is placed in a space formed by the other surface of the outer skin molding material that is not bonded to the pattern molding material after placing one surface of the outer skin molding material bonded to the pattern molding material on the inner molding surface of the mold having an arbitrary shape. Placing the secondary molding material; And sealing the mold to crosslink and foam the formed molding materials at the same time.

In addition, the present invention provides a method for producing a foam, the step of processing each of the outer skin molding material in a state where the crosslinked foam is suppressed at least one or more patterned molding material of any shape and the crosslinked foam is suppressed; Coupling the pattern forming material to one surface of the outer skin forming material; Placing one surface of the outer skin molding material in which the pattern molding material is bonded to the inner molding surface of the mold having an arbitrary shape; Sealing the mold and injecting the foaming material into a space formed by the other surface of the outer molding material to which the pattern molding material is not bonded and the inner molding surface of the mold; And simultaneously crosslinking and foaming the injected foam material and the molding material with other technical features.

The pattern portion molding material bonded to one surface of the outer skin molding material is characterized in that it consists of a plurality.

The pattern forming material is characterized in that it is made of a different color than the outer skin molding material.

Any one selected from both the outer skin molding material and the patterned molding material, or the outer skin molding material and the patterned molding material, is characterized in that it is made of the same or different materials as the body molding material.

Any one selected from both the outer skin molding material and the pattern molding material, or the outer skin molding material and the pattern molding material, is characterized in that it has a thin film shape.

Preferred embodiments of the present invention will now be described in detail with reference to the accompanying drawings. In the following detailed description of embodiments, specific details will be omitted.

The present invention basically comprises processing a molding material, bonding the processed molding material, placing the molding materials in a mold, and crosslinking and foaming the molding materials at the same time.

The step of processing the molding material is specifically, a body molding material which becomes the body of the final foam with crosslinked foaming suppressed, and an outer skin molding material which becomes an outer skin surrounding the body of the final foam with crosslinking foaming suppressed. And, the step of individually processing the patterned molding material to be bonded to one surface of the outer skin molding material in a state in which the cross-linking foam is suppressed to be expressed on the surface of the final foam. Each of the molding materials is not limited to any specific processing method as long as it can be realized as a state in which crosslinked foaming is suppressed, and any one of the processing methods widely known in the related art, such as injection molding, pressing or vacuum molding, and combination molding, It may be processed.

In addition, each of the molding materials may be all made of the same material, or may be made of a different material, of course, the present invention does not exclude the case that some of the molding material is made of the same material and the other part is made of different materials. to be. In addition, the present invention does not exclude both the case where each of the molding materials are made of the same color or different colors, and some are the same color and the other part is made of different colors, which includes a plurality of pattern molding materials Of course, the case is made of dogs and their colors are different from each other.

Since the body molding material may be variously changed according to the shape of the final foam, the shape is not limited to any particular shape as long as it is precisely weighed to be embodied in the skeleton shape of the body forming the final foam. However, since the molding material in the state in which the crosslinked foam is suppressed has a certain hardness, it is preferable that the molding material is formed in a shape that can be easily placed in the internal cavity of the mold for crosslinked foaming. The outer shell molding material is an outer shell covering all of the outer circumferential surface of the body molding material constituting the final foam or a specific portion selected from the outer circumferential surface. In particular, it is more preferable that the surface is not only flat in the state in which crosslinked foaming is suppressed, but also formed in a thin film shape with a uniform degree of roughness of the surface. The patterned molding material is a part that is bonded to one surface of the outer skin molding material to be exposed on the surface of the final foam, and can be arbitrarily selected from various shapes or letters according to the intended work, and thus no particular limitation is imposed on the shape thereof. Of course, it may be made of a thin film like the outer skin molding material.

On the other hand, each of the outer skin molding material and the patterned molding material may be operated in a manner of using them separately after processing to the required size or shape for each manufacturing process, of course, the molding material made of a constant size The outer skin molding material and the patterned molding material may be appropriately cut and used as necessary for each manufacturing process.

Figure 1a is a state in which the cross-linked foam is suppressed and the outer skin molding material 14 processed in a thin film shape, the outer skin molding material 14 and the color is different and the cross-linking foam is suppressed processing in two lines shape After preparing the patterned molding material 16, the patterned molding material 16 is an example of bonding to the one surface of the outer skin molding material 14, Figure 1b is a view of the outer skin molding material 14 disclosed in Figure 1a The pattern part molding material 16 is coupled to the upper surface, and FIG. 1C shows a cross-sectional structure of the AA ′ line of FIG. 1B.

On the other hand, in bonding the patterned molding material to one surface of the outer skin molding material, the outer skin molding material has a certain hardness and may not be easily coupled, but in the present invention, the outer skin molding material is melted and its shape Within this undeformed range, the case in which a certain amount of heat is applied to the outer skin molding material and then the patterned molding material is combined is not excluded.

When the bonding of at least one pattern forming material on one surface of the outer skin molding material is completed, the molding material is placed on the inner molding surface of the mold having an arbitrary shape. One surface of the outer skin molding material to which the material is bonded is first placed in close contact with the inner molding surface of the mold, and then the body molding material is placed in the mold inner space formed by the other surface of the outer skin molding material to which the pattern forming material is not bonded. I assume the way of enslavement. However, the present invention is not limited thereto, and the other surface of the outer skin molding material, to which the pattern molding material is not bonded, is placed in the mold in a state in which the other surface of the outer skin molding material is in close contact with the outer peripheral surface of the body molding material, or the body molding material is placed inside the mold. First of all, the case of placing the outer skin molding material combined with the pattern molding material into the space between the body molding material and the inner molding surface of the mold is not excluded.

FIG. 2 is a working relationship diagram in which a molding material is placed on the inner molding surface 22 of the mold 20. Specifically, the body portion molding material 12 having a rectangular shape and the outer skin disclosed in each of FIGS. 1B and 1C are illustrated. The case where work is performed using the molding material 14 is shown. When the molding materials are properly placed in the mold, the molds 20 and 40 are sealed and then properly heated to foam the molding materials simultaneously, thereby forming a foam pattern 160 having different colors along the surface as shown in FIG. 4A. The foam 100 is to be implemented. That is, even if there is no separate bonding process or painting process, it is possible to form a foam pattern made of various shapes or colors on the surface of the foam in one foaming process. In this example, the outer skin molding material is made of the same material as the body molding material, and the outer skin molding material forms part of the foamed body as it is integrated with the body molding material during the foam molding process in the mold. It is done.

Figure 4b is another example of the foam that can be implemented when combining the patterned molding material of various shapes in accordance with the present invention to the outer skin molding material, the foamed body 163 of the diagonal shape expressed on one side of the outer peripheral surface of the foam body 140 ) And a star-shaped foam pattern 164, and a foam pattern 162, which is expressed on the bottom surface and the lower side of the outer peripheral surface of the foam body 140 and has different physical properties, is disclosed. Figure 4c is another example of a foam that can be implemented according to the present invention, there is disclosed a foam pattern 180 protruding to the outside from one side of the outer peripheral surface of the foam body 140, the outer skin molding material molded body Because it is composed of the same material as the material, only the shape and color of the pattern forming material are expressed on the foam surface.

On the other hand, the present invention does not exclude the case of remolding or appropriately cutting the foam obtained through the cross-linking foaming step, the reshaping process or the cutting process for the foam is widely used in the related art and will not be described in detail. .

In addition to the above-described embodiment, the present invention comprises the steps of processing the molding material in the mold, the bonding step of the molding material, the step of placing in the mold of the molding material, and the injection of the foam material and cross-linking foaming step It proposes a method for implementing a foam having a technical feature that will be described in detail as follows. However, in the description of this embodiment, the description of parts overlapping with the above-described embodiment will be omitted.

First, each of the outer skin molding material and the patterned molding material is appropriately processed as crosslinked foam is suppressed, and then the mold is formed in an arbitrary shape as shown in FIG. 3 by bonding the patterned molding material to one surface of the outer skin molding material. The outer skin molding material 14 is placed in close contact with the inner molding surface 62 of 60. FIG. 3 shows a case where the pattern portion molding material and the outer skin molding material disclosed in FIGS. 1A and 1B are used as the molding material.

When one surface of the outer surface molding material 14 having the patterned molding material 16 bonded to the inner molding surface 62 of the mold 60 is brought into close contact with each other, the molds 60 and 80 are sealed and then the mold is closed. Foaming material is injected into the mold through the injection passage 82 formed. The foamed material injected through the injection path 82 is filled in the space formed between the other surface of the outer molding material and the inner molding surface of the mold where the pattern molding material is not bonded. Simultaneous crosslinking and foaming of the injected foam material and the molding material enables to obtain a foam as shown in FIG. 4A as in the above-described embodiment. According to the present invention, the material of the foamed material injected into the mold is not particularly limited and may be a material capable of crosslinking foaming.

In the above description, but limited to the preferred basic technical features and specific embodiments of the present invention, the present invention is not limited to this and can be variously modified or modified and whether such changes or modifications fall within the scope of the present invention. Should be interpreted by the technical spirit described in the claims.

As described above, the present invention enables to realize a foam having a foam pattern surface made of a variety of shapes or colors by a single foaming process, thereby producing a variety of foam products to meet the needs of consumers The advantage is that it is possible.

In addition, the present invention does not require a separate bonding process or a coating process in forming a foam pattern on the surface of the foam, which greatly simplifies the manufacturing process accordingly, thereby making products with various functions and appearances at low prices. It has the advantage of being able to produce.

Claims (10)

As a method for producing a foam, Each of the body molding material having an arbitrary shape as crosslinked foam is suppressed, at least one pattern forming material having any shape as crosslinked foam is suppressed, and the outer skin molding material as crosslinked foam is suppressed. Processing; Coupling the pattern forming material to one surface of the outer skin forming material; One surface of the outer skin molding material in which the pattern molding material is bonded is placed in close contact with the inner molding surface of the mold having an arbitrary shape, and then the space is formed by the other surface of the outer skin molding material in which the pattern molding material is not bonded. Placing the body molding material; And Sealing the mold to simultaneously crosslink and foam the formed molding materials; Method for producing a foam, characterized in that comprises a. The method of claim 1, Method of producing a foam, characterized in that the plurality of patterned molding material bonded to one surface of the outer skin molding material. The method of claim 1, The pattern forming material is a foam manufacturing method, characterized in that made of a different color from the outer skin molding material. The method of claim 1, Any one of the outer skin molding material and the pattern molding material, or any one selected from the outer skin molding material and the pattern molding material, is made of the same or different materials as the body molding material. . The method of claim 1, Any one selected from both the outer skin molding material and the patterned molding material, or the outer skin molding material and the patterned molding material, has a thin film shape. As a method for producing a foam, Processing each of the at least one pattern forming material having an arbitrary shape as crosslinked foam is suppressed and the outer skin molded material as crosslinked foam is suppressed; Coupling the pattern forming material to one surface of the outer skin forming material; Placing one surface of the outer skin molding material in which the pattern molding material is bonded to the inner molding surface of the mold having an arbitrary shape; Sealing the mold and then injecting the foaming material into a space formed by the other surface of the outer skin molding material to which the pattern molding material is not bonded and the inner molding surface of the mold; And Simultaneously crosslinking and foaming the injected foam material and the molding material; Method for producing a foam, characterized in that comprises a. The method of claim 2, Method of producing a foam, characterized in that the plurality of patterned molding material bonded to one surface of the outer skin molding material. The method of claim 2, The pattern forming material is a foam manufacturing method, characterized in that made of a different color than the outer skin molding material. The method of claim 2, Any one of the outer skin molding material and the pattern molding material, or any one selected from the outer skin molding material and the pattern molding material, is made of the same or different materials as the body molding material. . The method of claim 2, Any one selected from both the outer skin molding material and the patterned molding material, or the outer skin molding material and the patterned molding material, has a thin film shape.

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