KR20100059114A - Method of preparing bath tub with cushion and bath tub with cushion - Google Patents

Abstract

PURPOSE: A bath tub having elasticity and a manufacturing method thereof are provided, which can achieve good touching feeling of the inner side of the bath tub, and secure the safety by impact. CONSTITUTION: A manufacturing method of the bath tub having elasticity includes: a first step of forming outside structure layer; a second step of forming inside elastomer layer in the upper side of the elastic surface coating layer; a third step of forming a foam layer(3) that the outside structure layer and inside elastomer layer are united by filling in a gap between the inside elastomer layer and the outside structure layer(4); and a fourth step that the extension part of the inside elastomer layer is attached to the outside structure layer and closed by folding it according to the edge surface of the outside structure layer.

Description

Method of manufacturing a bath having elasticity and a bath having elasticity {Method of preparing bath tub with cushion and bath tub with cushion}

The present invention relates to a method for manufacturing a bath having elasticity and a bath having elasticity. More specifically, the inner surface of the bath has a good contact feeling, elasticity, and a feeling of comfort. It is excellent in heat retention, and does not need to replenish water when bathing, and especially when applied to a baby bath tub provides a bath having a cushion function that can be used as a bed or a cradle after bathing, The present invention relates to a tub and a method of manufacturing a tub having elasticity, which prevents the separation of layers from occurring at the edge of the tub, thereby improving durability, making finishing easy, and making the edge appearance of the tub beautiful.

In general, the tubs used are mobile and stationary tubs, and the portable tubs have been commonly used for infants, and the conventional tub manufacturing method of the portable tub including the conventional infant tub is mainly polyethylene or polypropylene. Most of the manufacturing method of the rigid plastic bathtub using ABS resin. In other words, the conventional rigid plastic tub manufacturing method has been mainly used a method of molding and demolding a resin in which a hardening resin is added to polyethylene or polypropylene ABS resin by a mold. In the case of a fixed bath, a conventional bath manufacturing method includes an artificial marble bath of a casting method using an unsaturated polyester resin and an acrylic bath of vacuum molding an acrylic plate.

Such a conventional bath manufacturing method is inexpensive and light, but it is hard and has a problem in that contact with the bath is poor, the skin is not good, and heat retention is not good, and thus hot water must be replenished during bathing. This problem is particularly problematic when bathing infants or newborns and thus causes greater problems in infant baths. In addition, the hard tub has a problem of a safety accident, especially when a collision occurs during the bath or falls from the bath to the bath, a bathtub having an elastic or cushion function has been developed to improve this. However, in the case of such a conventional bath having elasticity, as shown in FIG. 1, a layer structure of hard and soft outer layers is formed on each surface of the upper mold and the lower mold, and the foam is foamed with the foams interposed therebetween. Forming a layer to complete the bath and demoulding, since the end edge is left as shown, it is cut along the cutting surface as shown in the end to complete the bath, where the remaining ends are soft and hard parts narrow Since it meets along the contact surface, there is a problem that the bonding strength is weak, and the soft part is partially exposed and the water penetrates into the foamed layer, which damages the inner layer of the bathtub and becomes heavy due to the humidity. Problems occur, such as durability is reduced, the appearance is not smooth and scratches occur. .

Therefore, while solving this problem, the development of a bathtub and its manufacturing method that can implement all the advantages of the conventional bathtub having an elastic function is urgently needed.

In order to solve the problems of the prior art as described above, the present invention has a good contact feeling, the elasticity of the bath inner layer can feel the comfort, elastic material can ensure the safety of the impact, excellent thermal insulation when bathing There is no need to replenish water, and in particular, in the case of an infant bath, a bath having a cushion function that can be used as a bed or a cradle after bathing is provided, and water is prevented from permeating at the edge of the tub having such elasticity. And it is to provide a tub and a method of manufacturing a tub having elasticity to prevent the separation between the layers to improve the durability, easy to finish, and to make the edge appearance of the bathtub beautifully.

In order to achieve the above object, the present invention

In the manufacturing method of the bathtub,

A first step of forming an outer structure layer formed in a tub outer shape;

A release agent layer is formed on an outer surface of the inner mold having a bath forming surface corresponding to the inside of the bath and a flange portion extending outwardly from an edge of the bath forming surface, and an elastic surface coating layer is formed on an upper surface of the release agent layer, and the elastic Forming an elastic protective coating layer on an upper surface of the surface coating layer to form an inner elastic layer having an extension portion extending outwardly from an edge of the bathtub inner shape and the bathtub inner shape;

A third step of filling a spaced portion between the outer structure layer and the inner elastic layer to form a foam foam layer that couples the outer structure layer and the inner elastic layer; And,

And a fourth step of folding the extension of the inner elastic layer to the edge surface of the outer structure layer to adhere and finish the outer structure layer.

Also,

In the bathtub,

An inner elastic layer having a laminated structure consisting of an elastic protective coating layer and an elastic surface coating layer laminated on the outside thereof and having an extension portion extending outwardly from an edge of the tub inner shape and the tub inner shape; An outer structure layer consisting of only a tub outer shape; And a foam foam layer filled in a spaced portion between the outer structure layer and the inner elastic layer to bond the outer structure layer and the inner elastic layer.

The extension of the inner elastic layer provides a bath having elasticity, characterized in that it is folded to the edge surface of the outer structure layer and bonded to the outer structure layer.

According to the manufacturing method and the tub of the bath having elasticity of the present invention, the inner surface of the bath has a good contact feeling, elasticity and feel comfortable compared to the conventional bath tub, elastic material can ensure safety by impact. In addition, it is excellent in heat retention and does not need to replenish water when bathing, and especially in the case of an infant bathtub, a bath having a cushion function that can be used as a bed or a cradle after a bath is provided. Prevents water soaking, prevents the separation between the layers to improve durability, easy to finish, and has the advantage of making the appearance of the edge of the bathtub beautiful. In addition, there is a light advantage that can be easily handled even women with relatively poor physical strength.

Hereinafter, the present invention will be described in detail with reference to the accompanying drawings.

The present invention relates to a method for manufacturing a bath, comprising: a first step of forming an outer structure layer (4) formed in an outer shape of a bath; A release agent layer is formed on an outer surface of the inner mold having a bath forming surface corresponding to the inside of the bath and a flange portion extending outward from an edge of the bath forming surface, and an elastic surface coating layer 1 is formed on the upper surface of the release agent layer. A second step of forming an inner protective layer having an elastic protective coating layer (2) formed on an upper surface of the elastic surface coating layer (1) and having an extension portion extending outwardly from an edge of the inner shape of the bathtub and the inner shape of the bathtub; Filling a spaced portion between the outer structure layer 4 and the inner elastic layer (stacked structure of 1 and 2) to form a foam foam layer 3 joining the outer structure layer and the inner elastic layer; Step 3; And a fourth step of folding the extension of the inner elastic layer to the edge surface of the outer structure layer 4 to adhere and finish the outer structure layer 4.

Here, the first step and the second step may be performed in a reversed order, and the first step may be performed after the foaming of the foamed foam layer of the third step, as will be described in detail below. It is assumed that the ordering is not essential, only that each of these processes must be performed. (However, only the fourth step here should be final.)

Looking at the process of each step on the premise of this, the first step is to form an outer structure layer 4 having a tub outer shape, the outer structure layer forms the outer surface of the tub to serve as a structure in the tub It may be formed of a hard resin material used to produce a conventional rigid bath. In the case of a portable infant bathtub as a method of forming the same, a method of molding and injecting a resin in which a curing agent is added to polyethylene or polypropylene ABS resin into a mold, and an injection molding method may be used. Hard materials should be used to maintain the material, and a material having a certain degree of ductility that can withstand a certain degree of drop impact or other external shocks during use is preferable, and general purpose such as PS, PE, PP, ACRYL, ABS, PVC, PET, etc. Plastic is suitable. Preferably, the outer structure layer is manufactured by vacuum-forming a sheet-shaped plastic having a thickness of about 2 to 5 mm so as to have a shape as described above using a conventional vacuum molding machine. In the case of fixed type, FRP laminated with unsaturated polyester resin and glass fiber may be manufactured to a thickness of 4-5 mm or by vacuum forming an acrylic plate having a thickness of 4-5 mm. In this case, the outer structure layer should be made of a tub outer shape, so that the portion that extends from the outside unnecessarily must be removed through a post-treatment process.

Next, a second step is to form a release agent layer on the outer surface of the inner mold having a tub forming surface corresponding to the tub inner shape and a flange portion extending outward from the edge of the bath forming surface, the elastic surface coating layer on the upper surface of the release agent layer (1) to form an elastic protective coating layer (2) on the upper surface of the elastic surface coating layer (1) to form an inner elastic layer having an extension extending outward from the edge of the tub inner shape and tub inner shape It is a process.

Here, the mold is a male tub mold made of a FRP material used in a typical tub industry as a mold having a tub forming surface and a flange portion extending outward from the edge of the tub forming surface (left and right in the drawing) as shown in FIG. 2. (5), and as shown in Fig. 2, the back side thereof is placed upward, and a release treatment is performed by applying a release agent such as wax to the surface to release the release layer (between the mold 5 and the elastic surface coating layer 1). Layer).

The upper surface of the release layer forms an elastic surface coating layer 1 having good glossiness and elasticity and excellent scratch resistance forming the surface of the fluffy elastic portion. That is, the elastic surface coating layer 1 is formed on the release layer formed in the above process. As a specific example of this, the solvent type acrylic polyurethane coating agent or the aqueous or oil type polyurethane coating agent is sprayed on the surface of the release layer in an air spray method. Apply and dry. Preferably, the elastic material constituting the elastic surface coating layer is preferably a flexible resin having an elongation of 50% or more at break. Here, the elastic surface coating layer may be applied to the flange portion to form an extension of the internal elastic layer, or may be formed shorter than this. For example, it may be formed up to the front end of the flange portion so that the curved portion is an extension portion.

Next, in the process of forming the elastic protective coating layer (2), to form a coating film layer laminated on the formed elastic surface coating layer (1). That is, since the elastic surface coating layer 1 is a thin film, in case of using an elastic bath formed by the surface coating layer alone, the surface layer is easily broken, thereby protecting the elastic surface coating layer, and forming the waterproof layer of the foam foam layer 3 described later. The coating layer 2 is introduced. As a specific example of this, a fast curing type polyurethane-urea or a polyurea liquid raw material may be formed by using a spray apparatus, and a product having an elongation at break of at least 100% or more may be formed. It is suitable as a soft protective layer of an elastic bath. Herein, the elastic protective coating layer may be applied to the flange portion to form an extension of the internal elastic layer, or may be formed shorter than this. For example, it may be formed up to the front end of the flange portion so that the curved portion is an extension portion. In addition, the coating surface of the elastic protective coating layer and the elastic surface coating layer is not necessarily the same, of course.

Next, the third step may be filled in a spaced part between the outer structure layer 4 and the inner elastic layer (the lamination structure of 1 and 2) to form a foam layer (foam) layer for bonding the outer structure layer and the inner elastic layer ( 3) as a process of forming, the formation of the foam foam layer 3 is similar to the method of bonding the upper and lower molds and injecting the foam material into the space formed by the foam, the outer structure layer (4) The mold bonded to the inside and the internal elastic layer (the lamination structure of 1 and 2) may combine the mold 5 bonded to the inside, and may be foamed by injecting foam into the space formed by them, or separated from the mold. The outer structural layer 4 and the inner elastic layer (the lamination structure of 1 and 2) in a state may be bonded to a mold bonded therein, and a method of injecting and foaming a foam material into a space formed therein may be used. Foam material Roneun may be used, such as polyurethane. Also preferably, as shown in FIG. 2, an outer mold 7 (preferably having a protrusion 8 at an edge of the outer mold) is released on the upper surface of the inner elastic layer. After foaming the foam foam layer with a foaming material, the outer mold can be separated to obtain a form as shown in FIG. 2, and the outer structure layer 4 is bonded to the foamed foam layer upper surface thus foamed and shown on the left side of FIG. 4. One can prepare a preliminary bath as described. In this case, in the case where a part in which foaming is not partially made occurs, supplementary foaming work may be added before joining the outer structure layer so that the foamed foam layer may be uniformly formed. There is no need to make a separate injection hole for the foam material or a hole for the vent during the foaming process, the product is manufactured clean, and there is an effect that the post-process for processing such holes is reduced.

Irrespective of the method of forming the foamed foam layer 3, the preliminary bath formed in this manner is an extension made of an inner elastomer layer which is a laminate of an elastic surface coating layer and an elastic protective coating layer on the edge of the bath as shown on the left side of FIG. Part (In this case, as shown in Figure 2, when the end of the foam foam layer is raised up to the flange portion as shown in Figure 2 may be a portion formed on the upper surface of the flange portion, as shown in Figure 3 the end of the foam foam layer is a flange In the case of ending far below the portion, a portion of the curved end portion as shown in the figure may correspond to this).

Therefore, in the fourth step, the extension part of the inner elastic layer may be folded to the edge surface of the outer structure layer 4 to adhere to the outer structure layer 4 to finish. Specific examples thereof are as shown in FIG. 4. Through this, the elastic protective coating layer 2 serving as the waterproofing layer of the foamed foam layer 3 contacts the hard outer structure layer 4 with a large area, thereby securing a bonding strength and enhancing the waterproofing effect. It can be beautiful by preventing the mating surface from appearing. In this case, in order to smooth the winding of the extension part, the edge height of the foamed foam layer 3 is preferably lower than the upper surface of the extension part of the inner elastic layer, as shown in FIGS. 2 to 3. When the end of the foamed foam layer rises up to the vicinity of the flange portion as shown in FIG. 2 according to the low degree, the portion formed on the upper surface of the flange portion may be an extension portion, and as shown in FIG. 3, the end of the foamed foam layer is the flange portion. If it ends far below, a portion of the curved end as shown may correspond to the extension.

In another aspect, the present invention provides a bath having elasticity, which has a laminated structure consisting of an elastic protective coating layer (2) and an elastic surface coating layer (1) laminated on the outside thereof, the outer side from the edge of the tub inner shape and the tub inner shape An inner elastic layer having an extension extending to the inner side; An outer structure layer 4 having only a tub outer shape; And a foamed foam layer 3 filled in a spaced portion between the outer structure layer 4 and the inner elastic layer 1 + 2 to bond the outer structure layer 4 and the inner elastic layer 1 + 2. And an extension of the inner elastic layer 1 + 2 is folded to the edge surface of the outer structure layer 4 and bonded to the outer structure layer 4. Specific examples thereof are as shown in the right side of FIG. 4. The tub of such a structure may be manufactured by the above-described manufacturing method, or may be manufactured by another manufacturing method, and the bathtub includes all of the usual bathtubs, such as fixed and removable bathtubs. Applicable, especially in the case of the finishing portion, can be applied to a free-standing bathtub that can be moved through separation, preferably a baby bath can increase the use and effect of the bath.

The present invention described above is not limited to the above-described embodiment and the accompanying drawings, and various modifications and changes made by those skilled in the art without departing from the spirit and scope of the present invention described in the claims below. Changes are also included within the scope of the invention.

1 is a schematic diagram schematically showing a method of manufacturing a tub having a conventional elasticity.

Figure 2 is a schematic diagram schematically showing a part of an embodiment of a method for manufacturing a bath having elasticity of the present invention.

3 is a view showing an intermediate step fabrication of another embodiment of the method of manufacturing a bath having elasticity of the present invention.

Figure 4 is a schematic diagram schematically showing a finishing process of an embodiment of a method for manufacturing a bath having elasticity of the present invention.

Claims (4)

In the manufacturing method of the bathtub, A first step of forming an outer structure layer formed in a tub outer shape; A release agent layer is formed on an outer surface of the inner mold having a bath forming surface corresponding to the inside of the bath and a flange portion extending outwardly from an edge of the bath forming surface, and an elastic surface coating layer is formed on an upper surface of the release agent layer, and the elastic Forming an elastic protective coating layer on an upper surface of the surface coating layer to form an inner elastic layer having an extension portion extending outwardly from an edge of the bathtub inner shape and the bathtub inner shape; A third step of filling a spaced portion between the outer structure layer and the inner elastic layer to form a foam foam layer that couples the outer structure layer and the inner elastic layer; And, And a fourth step of folding the extension of the inner elastic layer to the edge surface of the outer structure layer to adhere to the outer structure layer to finish. The method of claim 1, In the third step, after inserting the outer mold that is mold-released therein on the upper surface of the inner elastic layer and foaming the foam foam layer with a foam material, the outer mold is separated, and the outer structure on the foamed foam foam layer upper surface. A method of making a bath having elasticity, characterized in that to combine the layers. The method according to claim 1 or 2, Edge height of the foam foam layer is a method of manufacturing a bath having elasticity, characterized in that lower than the upper surface of the extension portion of the inner elastic layer. In the bathtub, An inner elastic layer having a laminated structure consisting of an elastic protective coating layer and an elastic surface coating layer laminated on the outside thereof and having an extension portion extending outwardly from an edge of the tub inner shape and the tub inner shape; An outer structure layer consisting of only a tub outer shape; And a foam foam layer filled in a spaced portion between the outer structure layer and the inner elastic layer to bond the outer structure layer and the inner elastic layer. And an extension of the inner elastomer layer is folded to an edge surface of the outer structure layer to bond to the outer structure layer.

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