JPH0319462B2 - - Google Patents

Description

[Detailed Description of the Invention] [Field of Industrial Application] The present invention relates to a shutter that partitions the air passage when switching between cooling and heating in air conditioners (hereinafter referred to as air conditioners) ranging from large to small size. In particular, the present invention relates to a shutter in which a foam such as urethane foam is integrally formed on the surface of a partition substrate of the shutter, and a method for manufacturing the shutter.

[Conventional technology]

Conventionally, shutters that partition the air ducts in air conditioners for automobiles, for example, have a core material consisting of a rotating shaft, a partition substrate fixed to the rotating shaft, and a shaft attachment part formed at one end of the rotating shaft, and a core material made of urethane foam resin, etc. (Utility Model Application Publication No. 60-96107). The core material is a molded product of glass fiber-containing resin or hardware, and a foam with an expansion ratio of about 50 to 60 times is bonded to the core material on all or part of the rotating shaft except for the shaft attachment part. and formed a shutter.

To explain how to bond the foam, first, 3m x 3
A foam material having dimensions of about m x 3 m is cut into a certain size using electric heat or the like to form a large-sized material, and glue is applied to one side of the large-sized material. Next, a large size material is pressed to form a shaped material having various shutter dimensions, and a double-sided tape is adhered to the glued surface of the shaped material. Finally, the backing paper of the double-sided tape on the shaped material was peeled off, and the shaped material was glued in place on the core material of the shutter. Further, depending on the shape of the shutter, if it is necessary to form a bulge on the surface of the foam, a so-called mounting operation is performed in which the bulletin body is laminated so as to bulge that portion.

[Problems to be solved by the present invention]

Therefore, conventionally, when manufacturing shutters,
Production of foam material, cutting into large size materials, applying glue, pressing into shaped materials, adhesion of double-sided tape,
This required the process of peeling off the backing paper from the double-sided tape and adhering the foam material to the core material. Moreover, the process of peeling off the backing paper of the double-sided tape and adhering the shaped material to the core material was currently a manual process.

As mentioned above, when adhering the foam and the core material using conventional double-sided tape, sufficient adhesion force cannot be obtained. It had a tendency to peel off easily from the adhesive part. Furthermore, since it involves multiple and complicated work steps, it is inefficient in terms of work time, amount of labor, and cost. Furthermore, since the bonding work was done by hand, it was not possible to bond the product uniformly, and in the post-process, the edges of the foam were often scraped or reworked to prepare them, resulting in unevenness in the product of the shutter.

The present invention solves the above-mentioned conventional problems, and provides a shutter and a method for manufacturing a shutter in which the foam does not peel off from the core material, and in which the manufacturing process of the shutter is extremely simplified and manufacturing efficiency is improved. The purpose is to

[Means for solving problems]

In view of the above problems, the present invention has taken the following measures.

(1) In a shutter that partitions cold and hot air from an air conditioner with a wind duct, the core member is composed of a rotating shaft, a partition substrate fixed to the rotating shaft, and a shaft attachment part formed at one end of the rotating shaft. This shutter is characterized by integrally foam-molding synthetic resin foam in all or part of the material except for the shaft attachment part.

(2) A core material consisting of a rotating shaft, a partition substrate fixed to the rotating shaft, and a shaft attachment part formed at one end of the rotating shaft is fitted into a mold, and the mold is filled with foamed resin. , a method for manufacturing a shutter, characterized in that a foam is integrally formed on all or a part of the core material except for the shaft attachment part.

[Effect]

According to the shutter of the present invention, since the synthetic resin foam is integrally foam-molded into the core material, the two are firmly bonded and the foam does not peel off from the core material.

In addition, since foamed resin is injected into the mold into which the core material is fitted and integral foam molding is performed, manufacturing of the shutter is simplified and manufacturing efficiency is improved.

〔Example〕

Embodiments of the present invention will be described based on the drawings. 1st
3 and 4 are perspective views showing the respective core materials with holes formed in the partition substrate, and FIGS. FIG. 3 is a cross-sectional view showing a state in which a core material of the present invention is fitted inside.

The shutter S and its core material F shown in FIGS. 1 to 4 are constructed as follows. Core material F
is a molded product made of ABS glass fiber-containing resin, and consists of a rotating shaft 1, a partition substrate 2 integrally molded with the rotating shaft 1, and a shaft attachment part 3 formed at one end of the rotating shaft 1. . The shaft attachment part 3 is connected to an air conditioner side rotational drive part. 4 is a synthetic resin foam such as urethane foam resin molded together with the core material F. The partition substrate 2 has a flat plate shape, and a foam body 4 is integrally foam-molded on both sides of the partition substrate 2 or so as to cover the partition substrate 2 (not shown) and also to cover the rotating shaft 1. Shutter S
It consists of Convex portions 5 are formed on both sides of the partition substrate 2 in order to improve adhesion to the foam 4. Further, as shown in FIGS. 3 and 4, the partition substrate 2 is formed with one or more holes 6 in the shape of a notch or a circle, and both surfaces of the partition substrate 2 are formed in a continuous manner. The front and back surfaces of the partition substrate 2 are communicated through the hole 6, and the foam 4 is integrally molded in a connected state, so that the foam 4 and the core material F are connected.
This allows for an even stronger structure. M in Figure 2
The part shown in the figure is the aforementioned mount part.

Next, a method of manufacturing the shutter S by foaming will be explained based on FIGS. 5 and 6. The core material F is fitted into formworks 7 and 8 such as a pair of upper and lower molds, and a synthetic resin foam 4 such as urethane foam resin is inserted under pressure through a foam injection port 9 formed in one formwork 7. Formwork 7, 8
Inject and fill the inside. Foam 4 used in the present invention
The foaming ratio is determined by considering the melt viscosity, strength, etc.
It is also preferable for integral foam molding to the core material F to mix the cellulose at a ratio of about 20 to 40 times to make the cell cells denser than before. Foaming is performed in the molds 7 and 8 filled with the foam 4, and the product, ie, the shutter, is taken out after an appropriate period of time. In FIG. 5, a foam 4 is integrally molded on the front and back surfaces of the partition substrate 2 of the core material F, leaving the periphery of the partition substrate 2 intact.
Furthermore, in FIG. 6, the foam 4 is integrally molded onto the core material F in which the hole 6 is formed in the partition substrate 2, but the foam 4 is also attached to the rotating shaft 1 of the core material F. Formworks 7, 8 around the rotational axis 1 so as to be coated
A void is formed on the inner surface. Especially the core material is ABS
In the case of metal or polyethylene materials that are difficult to adhere to than resin, the foam 4 is applied so as to cover the core material F in which the holes 6 are formed using the molds 7 and 8. By doing so, the foam 4 can be integrally molded with the core material F more firmly. The foam 4 is injected into the molds 7 and 8 from the foam injection port 9 under constant pressure, and is completely filled into the voids inside the molds 7 and 8.
After the foaming process is completed, the integrally foam-molded shutter S is taken out from the molds 7 and 8, and if finishing is required, the unnecessary selvage part on the periphery of the foam body 4 is cut off, and the manufacturing of the shutter S is completed. . In addition, when molding the mount part M on the foam 4, the formwork 7,
By forming a predetermined recess in one of the parts 8, the recess is filled with the foam 4, and the mount part M is formed.

〔Effect of the invention〕

The present invention is constructed as described above, and the following effects were obtained from its operation.

Instead of gluing a ready-made foam to the core material of the shutter as in the past, in integral foam molding,
Since the foam is molded to adhere to the core material, the core material and the foam are integrally molded, and there is no possibility that the foam will peel off from the core material.

In addition, when manufacturing shutters, the following steps are required: producing the foam material, cutting it into large-sized materials, applying glue, pressing the shaped material, adhering double-sided tape, peeling off the backing of the double-sided tape, and applying the shaped material to the core material. Shutters are manufactured using integral foam molding, which does not require multiple and complicated work processes such as gluing, and fills the foam into a formwork with a core material inserted inside, which greatly simplifies the work process and reduces work time. This not only improves efficiency in terms of the amount of labor and reduces costs, but also allows the shutter to be manufactured with a uniform finish and without waste.

Furthermore, when forming the mount part,
Conventionally, this process involved laminating and bonding foam, but by forming a predetermined recess in the formwork,
This allows for integral foam molding and molding of a mount part on the foam, improving work efficiency.

[Brief explanation of the drawing]

1 to 6 relate to embodiments of a shutter and a method of manufacturing the shutter according to the present invention. Figures 1 and 2 are perspective views showing the shutter, Figures 3 and 4 are perspective views of the respective core materials with holes formed therein, and Figures 5 and 6 are perspective views showing the respective cores in the formwork. It is a sectional view showing a state where a material is fitted inside. DESCRIPTION OF SYMBOLS 1... Rotating shaft, 2... Partition board, 3... Pivoting part, 4... Foam, 6... Hole, 7, 8... Formwork, 9... Foam injection port, S... Shutter, F
...Core material, M...Mount part.

Claims (1)

[Scope of Claims] 1. In a shutter that partitions cold and hot air from an air conditioner with a wind duct, there is provided a core material consisting of a rotating shaft, a partition substrate fixed to the rotating shaft, and a shaft attachment part formed at one end of the rotating shaft. A shutter characterized in that all or part of the shutter, except for the shaft attachment part, is integrally foam-molded with a synthetic resin foam. 2. A core material consisting of a rotating shaft, a partition substrate fixed to the rotating shaft, and a shaft attachment part formed at one end of the rotating shaft;
A method for manufacturing a shutter, which comprises fitting the shutter into a mold, injecting foamed resin into the mold, and integrally foam-molding all or part of the core material except for the shaft attachment part.