JPH08267474A - Method and apparatus for molding cushion-filled article - Google Patents

Abstract

PURPOSE: To simply manufacture an article which is integrally formed of a cushion with a cover and a support member such as a shell made of a synthetic resin without necessity of the after care of the free end piece of the cover. CONSTITUTION: The cover 4 for covering a cushion 3, the wide surface and the peripheral edge face is disposed inside a rib 12 protruding over the entire periphery of the inner surface of the cavity 10a of one mold 10 of a pair of molds 10, 11 having cavities 10a, 11a of the contour shape of the backrest of a chair, and outside of the free end piece 4a of the cover 4 is supported. A synthetic resin material 15 is charged in the cavity 11a of the rear surface side of the cushion 3, and the backrest internally mounted with the cushion 3 between the cover 3 and the member of a synthetic resin 15 is integrally manufactured.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for molding a cushioned article such as a cushion portion in furniture such as a backrest portion of a chair or a seat portion, a cushion portion in a vehicle such as an automobile, and an apparatus therefor.

[0002]

2. Description of the Related Art Conventionally, for example, a backrest or a seat of a chair is made of synthetic leather or a fabric panel (synthesized on the back side of the fabric by combining the wide surface and the peripheral surface of a cushion body such as foamed urethane resin or sponge body). It is general that the cushion portion is formed by integrally covering with a cover made of resin sheets adhered to each other, the same hereinafter). As a method of manufacturing this cushion portion, Japanese Patent Publication No. 57-1271 discloses that the woven fabric panel is vacuum-adsorbed on the mold surface (cavity surface) of one mold so that the synthetic resin sheet is located in the cavity. In this state, the mold is combined with the other mold, the foam resin is filled in the cavities of both molds, the foam resin is solidified, and then the molds are separated and integrally molded. .

[0003]

However, in order to fix the cushion portion of this kind to the inner surface of the shell of the chair (the shell-like support member made of a hard synthetic resin, the same shall apply hereinafter), the cushion portion is removed from the peripheral edge of the cushion body. There is a problem that the assembly work is troublesome, for example, the edge piece (free edge piece) of the cover extending to the above is inserted into the shell so as to be wound and then fixed.

As a means for solving this problem, the applicant of the present application has previously proposed in Japanese Utility Model Laid-Open No. 4-1338000 that a groove portion for fitting a wrinkle portion of a cover is provided at a corner portion of a peripheral edge of a cushion body. However, even if this means is adopted, since the work of fixing the cushion body to the shell (support member) remains, the problem that the assembly work of the chair and the like takes time is not solved.

The present invention has been made to solve these conventional problems all at once, and an object thereof is to integrally manufacture an article comprising a cushion body with a cover and a supporting member such as a shell. It is what

[0006]

In order to achieve the above object, the invention of a molding method for a cushioned article according to claim 1 is one of a pair of molding dies having a cavity having the contour shape of the article. After arranging the cover along the inner surface of the cavity of one of the molding dies, a cushion body is arranged on the back surface side, and then a partial peripheral edge or the entire peripheral edge of the cover is provided by a restricting body protruding into the cavity. After supporting the outside of the mold, a synthetic resin material is filled in the cavities of the pair of molding dies.

According to a second aspect of the present invention, there is provided a molding apparatus for a cushioned article, wherein one of a pair of molding dies having a cavity having the contour shape of the article is provided in a cavity of the molding die. A device for forming a cushioned article by arranging a cushion body and a cover for covering a wide surface and a peripheral surface of the cushion body, and filling a synthetic resin material into a cavity on the back surface side of the cushion body to form an article containing the cushion body. The molding die is provided with ribs that project into the cavity and support the outside of a part or the whole periphery of the cover.

According to a third aspect of the present invention, there is provided a molding apparatus for a cushioned article, wherein one of a pair of molding dies having a cavity having the contour shape of the article is provided in the molding die.
An apparatus for forming an article with a cushion body by arranging a cushion body and a cover for covering a wide surface and a peripheral surface of the cushion body, and filling a synthetic resin material in a cavity on the back surface side of the cushion body, wherein A cover is laid along the inner surface of the cavity of the mold, and the cushion body is arranged on the inner surface side of the cover, while at least a part of the periphery of the cover is provided between the other mold or both molds. It is provided with an auxiliary mold for pushing into the cavity of the other mold.

[0009]

EXAMPLE Next, an example in which the present invention is embodied will be described. FIG. 1 shows a backrest portion 1 of a chair as a completed body, on the surface side of a shell 2 made of a hard synthetic resin. Flexible urethane foam, flexible leather such as the wide surface and peripheral surface of the cushion body 3 such as a sponge body, synthetic leather, fabric panel (a synthetic resin sheet adhered to the back side of the fabric, the same applies below) Is integrally covered with a cover 4 (same below) as a cover body having a cushion portion. Of the peripheral portion of the cover 4 that covers the peripheral portion of the cushion body 3, the free end piece 4a is arranged along the inner peripheral surface of the rib 12 during injection molding of a thermoplastic synthetic resin material 15 such as nylon resin described later. Restrained by the rib 1
It is fixed by the synthetic resin in the shell 2 along the groove 5 formed by 2.

In the first embodiment, as a device for integrally molding the backrest 1, a pair of molding dies 10, 11 having a shell 2 and cavities 10a, 11a having the contour shapes of the cushion portion are provided. Prepare The cavity 10a in one molding die 10 has the contour shape of the front surface of the cushion portion and the front contour shape of the shell 2 (see FIGS. 2 and 3). In the cavity 10a,
A rib 12 as a restricting body for supporting a part or the whole peripheral edge of the cover 4 is projected. Further, the cavity 11a in the other molding die 11 is the shell 2
Has a contour shape on the back side. The thickness of the rib 12 is 0.5 mm
~ 2mm.

In the molding operation, first, as shown in FIG. 2, among the cavities 10a of one molding die 10,
The cover 4 is arranged on the inner peripheral side of the rib 12, the peripheral edge of the cover 4 is raised along the inner peripheral surface of the rib 12, and then the cushion body 3 is inserted on the back surface side of the cover 4. In this case, it is desirable that the free end piece of the cover 4 slightly projects in the cavity 11a direction from the back surface of the cushion body 3 (see FIG. 5).

Next, as shown in FIG. 4, the cavity 11a is covered with the other molding die 11 so as to cover the cavity 10a of the one molding die 10 and the molten metal is discharged from the spool 14. Synthetic resin material such as nylon resin 1
5 is injected, and the space other than the cavity 11a and the wide surface and the peripheral portion of the cushion body and the cover 4 is filled with the synthetic resin material 15.

In this case, a part or the entire peripheral edge of the cover 4 is constrained by the ribs 12 so as not to fall toward the outer diameter side. In other words, the free end piece 4a of the cover 4 is cushioned over substantially the entire peripheral edge. Since it is possible to fall so as to approach the back surface of the body 3, the free end piece 4a is buried or adhered in the synthetic resin material 15 in the cavity 11a over almost the entire peripheral edge of the cover 4. , The synthetic resin material 15 is solidified, and both molding dies 10, 1
After removing 1 and integrally forming the backrest 1, the free end piece 4a does not come off, and the thick portion or groove 5 of the shell 2
Since it is buried in the inner surface side of the cover 4, there is no inconvenience such as fraying of the free end piece of the peripheral edge of the cover 4, and the cover 4
It eliminates the need to clean up the perimeter of.

Incidentally, the synthetic resin material 1 in the cavity
When the thickness of the sponge-shaped cushion body 3 is reduced by the injection pressure of 5, the free end piece 4a approaches the back surface of the cushion body 3 over almost the entire peripheral edge of the cover 4, and the free end piece 4a is solidified. Shell 2 of synthetic resin material 15
It has the effect that it is more difficult to come off because it is buried within the thickness of the. Further, the ribs 12 surround the four circumferences of the cushion body 3 in the cavity 10a of the one molding die 10,
If provided in at least four places, the cover 4 and the cushion body 3 will not be displaced in the cavity 10a, so that the molding operation can be extremely facilitated.

In FIG. 6, a cushion portion is constructed by integrally covering the upper surface side of a shell 2 made of a hard synthetic resin with a sponge-like cushion body 3 and a flexible cover 4 made of a fabric panel. A molding device for molding the seat body 6,
Also in this case, the cavity 10a of one molding die 10
Has the contour shape of the front surface of the cushion portion and the contour shape of the front surface of the shell 2 (see FIGS. 2 and 3). A rib 12 as a restricting body for supporting a part or the whole peripheral edge of the cover 4 projects into the cavity 10a. The cavity 11a in the other molding die 11 has a contour shape on the back side of the shell 2.

The second embodiment shown in FIG. 7 is a pair of front and rear or upper and lower molding dies 10 and 11, one of which is the molding die 1.
On the inner surface of the cavity 10a of 0, a cushion body 3 for forming a backrest portion or a cushion portion of a seat body, and a flexible cover 4 for covering the wide surface and the peripheral surface of the cushion body 3 are arranged. A shell for supporting the cushion portion is formed in the cavity 11a of the molding die 11. An auxiliary mold 16 as a restricting body is arranged between the molding dies 10 and 11 so as to surround the cavities 10a and 11a, and the auxiliary mold 16 includes the cover. 4 around the periphery of the cavity 11
The rib 17 is provided to be pushed into the a side. In this case, it is preferable that the free end piece 4a of the cover 4 projects from the rib 17 and extends so as to face the inside of the cavity 11a. In addition, the auxiliary mold 16 is configured to move in a parallel manner with respect to the mating surfaces of the molding molds 10 and 11 with respect to the cavity 11a.

Therefore, when the molten synthetic resin material 15 is poured into the cavity 11a from the spool 14 on the side of the other molding die 11, the free end piece 4a of the cover 4 is wound into the synthetic resin material 15 and the cavity 11a. Solidifies within,
Since it will be stopped in the thick part of the shell part, the cover 4
The free end piece 4a does not come off, and it is not necessary to clean up the peripheral edge of the cover 4.

In the third embodiment shown in FIG. 8, an auxiliary mold 19 as a restricting body is provided at the tip of a rod 18 which is provided on the other molding mold 11 and which moves back and forth. Both molds 1
With the 0 and 11 in close contact with each other, the auxiliary mold 19 is provided with the recess 20.
When it is protruded from the molding die 11, it has flexibility on the surface of the auxiliary mold 19 near the mating surface of the cavity 11a forming the shell of the molding die 11 and the cavity 10a of the one molding die 10. The free end piece 4a of the cover 4 is configured to be pushed into the cavity 11a.

With this structure as well, a shell in which the cover 4 and the cushion body 3 are integrally mounted on the front surface is formed as in the embodiment shown in FIG. Then, in the embodiments of FIGS. 7 and 8, the cavity 11a forming the shell is formed.
Can be formed in a state in which the periphery of the cushion body 3 with the cover 4 projects outward by a dimension (L) (a cushion portion overhangs on the outer diameter side with respect to the outer peripheral edge of the shell). There is a remarkable effect.

Therefore, when integrally molding a cushioned article with a pair of molding dies, the rib 12 shown in FIG. 2 and the auxiliary mold 16 or 19 may be provided at appropriate positions. Of. It is needless to say that the method and the manufacturing apparatus of the present invention can be applied to a cushioned seat of a chair, a backrest, a seat such as an automobile, and other articles.

[0021]

As described above, claim 1
The invention of the method for molding a cushioned article according to claim 1, wherein after arranging the cover along the cavity inner surface of one of the pair of molding dies having a cavity having the contour shape of the article, After disposing the cushion body on the back side thereof and then supporting the outer side of the partial peripheral edge or the entire peripheral edge of the cover by the restricting body protruding into the cavity,
The cavities of the pair of molding dies are filled with a synthetic resin material.

Therefore, when the outside of a part of the peripheral edge or the entire peripheral edge of the cover is supported by the restricting body protruding into the cavity, the partial peripheral edge or the entire peripheral edge of the cover enters the inner diameter side, that is, the cavity. By injecting the synthetic resin into the cavity in that state, the back surface of the cushion body is supported by the solidified synthetic resin material while the cushion body is covered by the wide surface and the peripheral portion of the cover, and To integrally manufacture an article in which a cushion body is inserted between a cover, a synthetic resin material as a support member, and a cover, by being solidified by being wrapped in the injected synthetic resin with free end pieces of the peripheral edge or the entire peripheral edge. You can Since the free end piece of the cover is embedded in the thick portion of the synthetic resin material, the free end piece of the cover does not easily come off, and there is no inconvenience such as the free end piece of the peripheral edge of the cover fraying. The effect is that there is no need to clean up the periphery of the cover.

According to a second aspect of the present invention, there is provided an apparatus for molding a cushioned article, wherein one of a pair of molding dies having a cavity having the contour shape of the article is provided in the cavity of one of the molding dies. A device for forming a cushioned article by arranging a cushion body and a cover for covering a wide surface and a peripheral surface of the cushion body, and filling a synthetic resin material into a cavity on the back surface side of the cushion body to form an article containing the cushion body. The molding die is provided with ribs that project into the cavity and support the outside of a part or the whole periphery of the cover.

The ribs protruding into the cavity of the one molding die can position the cover and the cushion body, and only support the outside of a part or the whole periphery of the cover. If the cavity on the back side is filled with the synthetic resin material, the free end piece of the cover is immediately caught in the injected synthetic resin and solidified, and the cushion body is provided between the cover and the synthetic resin material as the support member. It is possible to integrally manufacture an article containing the. The rib portion becomes a groove of the synthetic resin portion that supports the cushion body after molding, and is fixed to the synthetic resin material on the inner surface side of the groove, so the free end piece of the cover does not easily come off, and This has the effects of eliminating the inconvenience of fraying of the free edge piece on the peripheral edge and improving the appearance of the article.

Further, according to a third aspect of the present invention, there is provided an apparatus for molding a cushioned article, wherein the cushion body is provided in one of a pair of molding dies having a cavity having the contour of the article. A device for forming an article with a cushion body by arranging a cover for covering a wide surface and a peripheral surface of the cushion body, and filling a synthetic resin material in a cavity on the back surface side of the cushion body to form an article with a cushion body. A cover is laid along the inner surface of the cavity of the mold, and a cushion body is arranged on the inner surface side of the cover, while at least a part of the peripheral edge of the cover is provided between the other mold or both molds. It is provided with an auxiliary die for pushing into the cavity of the die.

According to the present invention, the auxiliary mold for pushing the free end piece of the cover into the cavity is arranged between the pair of molds or in the other mold. In addition to the function and effect of the invention described in Item 2, it is possible to appropriately set the removal direction of the auxiliary molding die when the molded article is removed, and it is easily applied to an article having a complicated contour shape. The effect is that it can be done.

[Brief description of drawings]

FIG. 1 is a cross-sectional view of a molded article (backrest portion).

FIG. 2 is a cross-sectional view showing an arrangement order of a cover and a cushion body on one molding die.

FIG. 3 is a plan view of one molding die.

FIG. 4 is a cross-sectional view of a state in which a pair of molding dies are sealed.

FIG. 5 is a modification of the rib portion of one molding die.

FIG. 6 is a cross-sectional view of a state in which a pair of molding dies is sealed when molding a seat as an article.

FIG. 7 is a cross-sectional view of essential parts of a second embodiment.

FIG. 8 is a cross-sectional view of essential parts of a third embodiment.

[Explanation of symbols]

 2 Shell 3 Cushion body 4 Cover 4a Free end piece 5 Groove 10, 11 Molding die 10a, 11a Cavity 12, 17 Rib 14 Spool 15 Synthetic resin material 16, 19 Auxiliary die

Continuation of the front page (51) Int.Cl. ⁶ Identification number Reference number within the agency FI Technical display location B29C 45/16 9543-4F B29C 45/16 B68G 7/05 B68G 7/05 C // B29K 105: 04 B29L 9 : 00 31:54

Claims (3)

[Claims] 1. A cover is arranged along the inner surface of a cavity of one of a pair of molding dies having a cavity having the contour of an article, and then a cushion body is arranged on the back side thereof. Then, after supporting the outside of a part of the peripheral edge or the entire peripheral edge of the cover with a restricting body protruding into the cavity, the cavity of the pair of molding dies is filled with a synthetic resin material. A method for forming an article containing a cushion body. 2. A cushion body and a cover for covering a wide surface and a peripheral surface of the cushion body in a cavity of one of a pair of molding dies having a cavity having a contour shape of an article. A device for molding a cushioned article by arranging and filling a synthetic resin material into a cavity on the back surface side of the cushion body, wherein one molding die projects into the cavity and A molding device for a cushioned article, comprising a rib for supporting an outer side of a part of the peripheral edge or the entire peripheral edge. 3. A cushion body and a cover for covering a wide surface and a peripheral surface of the cushion body are arranged in one of a pair of molding dies provided with a cavity having an outline shape of an article. A device for molding a cushioned article by filling a synthetic resin material into a cavity on the back side of the cushion body, wherein a cover is laid along the cavity inner surface of one mold, and the inner surface side of the cover is While placing the cushion body in, between the other mold or both molds,
A molding apparatus for a cushioned article, comprising an auxiliary mold for pushing at least a part of the periphery of the cover into the cavity of the other mold.