JPH04135709A - Preparation of skin integrated urethane foam - Google Patents

Abstract

PURPOSE:To obtain a product of good quality generating no leakage of urethane by a method wherein the engaging part of a skin material is provided to a foaming mold to be attached to the skin material in a detachable manner and the skin material is inserted in the foaming mold and a urethane solution is injected in the foaming mold to engage the engaging member with an engaging part to position the skin material within the foaming mold and foamed under heating after clamping. CONSTITUTION:An engaging part 10 is provided to a foaming mold 5 and a setting pin 11 engageable with the engaging part 10 is attached to a skin material 2 in a detachable manner. The skin material 2 is inserted in the foaming mold 5 and a urethane solution is injected in the mold from a mixing head nozzle 6. The setting pin 11 is engaged with the engaging part 10 to position and set the skin material 2 and an upper lid 5a is closed to foam the urethane solution under heating. Since the skin material 2 is fixed to the foaming mold 5, the leakage of urethane from a mating surface is prevented. In this case of the skin material 2 having a tab piece 2b sewn thereon, the setting pin 11 is attached to the tab piece 2b and the spring 12 becoming the engaging part is arranged in the foaming mold 5 and the setting pin 11 is engaged with the spring 12 to fix the tab piece 2b and the wrinkles or deformation of a root part can be prevented.

Description

DETAILED DESCRIPTION OF THE INVENTION <Industrial Application Field> The present invention relates to a method for manufacturing a urethane foam integral with a skin.

<Prior art> As shown in FIGS. 8 and 9, an armrest 1 for an automobile seat is made of a slab woo and a lace cloth 2 on the back side of a fabric.
A laminated skin material 2 and foamed urethane 3 inside are integrated, and the skin material 2 has an armrest concealing piece 2d extending at its upper part, and a knob piece 2b at its lower part. An insert part 4 for reinforcement is embedded in the urethane foam 3.

Conventionally, the manufacturing method for this is as shown in FIG. 10, in which the skin material 2 and the insert part 4 are loaded into the foaming mold 5, and urethane liquid is injected into the mixing chamber through the rad nozzle 6.
The top 115a is closed and foaming is carried out by heating at a required temperature.

Further, as a means for setting the insert part 4 in the foaming mold 5, as shown in FIGS. The insert part 4 is assembled into the foam mold 5, and the support pin 9 is made to protrude into the mold through the hole 2C made in the side surface of the skin material 2, so that the insert part 4 is suspended in the air.

<Problems to be Solved by the Invention> In the conventional manufacturing method described above, as shown in FIG. 10, after the urethane liquid is injected, the upper fi 5a is closed and foamed, but after foaming, the upper mating part of the skin material 2 is pushed and spread. From this, the first
As shown in Figure 1, urethane leakage (A) occurs, and this leaks out to the outside, resulting in poor appearance.

In addition, since the knob piece 2b is free in the foaming mold 5, the 14th
As shown in the figure, the base of the knob 2b has wrinkles and deformation (b).
Occur.

Furthermore, it takes time to set the insert part 4 suspended in the air, and when setting the foam mold 5 and the skin material 2 to open the seat surface, the foam mold 5 and the skin material 2 are misaligned, resulting in holes 2C as shown in FIG. There were problems such as Wt<c) occurring around the .

<Means for Solving the Problems> The present invention has been made to solve the above-mentioned conventional problems, and its gist is to provide a locking part for positioning the skin material on a foam mold, An engaging member that engages and disengages from the locking portion is removably attached to the locking portion, and a skin material is inserted into the foam mold, and urethane liquid is injected to lock the engaging member to the stop portion to attach the skin material to the foam mold. It is characterized by heating and foaming at a required temperature after positioning the insert part inside the mold and closing the mold with or without loading the insert part.

Function> In the above manufacturing method, after the urethane liquid is injected, the locking member stops and positions the skin material in the locking part of the foam mold, and prevents the urethane from leaking out due to the upper mating part of the slanted skin material being pushed and spread. It also prevents wrinkles and deformation, resulting in a product of good quality.

<Example> An actual example of the method of the present invention will be described below based on the drawings. In FIG. 1, 5 is a foam mold, and 5a is an upper lid. This foam mold 5 is provided with a locking portion 10 such as a groove. Further, a set pin 11 which can be engaged with and detached from the locking portion 10 is detachably attached to the skin material 2.

In such a configuration, as shown in FIG. 4(A),
The skin material 2 is inserted into the foam mold 5, and urethane liquid is injected from the mixing head nozzle 6. At this time, the insert part 4 may or may not be inserted and suspended if necessary, and the set pin 11 is locked to the locking part 10 as shown in FIG. 4(B). Then, as shown in FIG. 4(C), the upper 11
5a is closed and heated (for example, with steam) at a required temperature (for example, 80 to 100°C) to foam.

In this case, as shown in FIG. 3, since the skin material 2 is firmly fixed to the foam mold 5 with the set pins 11, the upper mating part of the skin material will not be pushed and expanded by the foaming of the urethane, and the mating part This prevents urethane from leaking.

In addition, in the armrest 1 in which the knob 2b is sewn to the skin material 2, as shown in FIG. 4(A), a set pin 11 is attached to the knob 2b, A spring 12 serving as a locking portion is installed inside the foaming mold 5, and by locking the set pin 11 to this spring 12, the knob piece 2b, which was in a free state, is moved into the foaming mold 5.
It is securely fixed in a fixed position inside, and the attachment of the knob 2b prevents the root from wrinkling or deforming. In this case, when the product is demolded upward after foaming, the spring 12 is elastically deformed upward and the set pin 11 easily releases its engagement, as shown in FIG. 4(B).

As shown in FIG.
3, a tension spring 14, and a guide 15, and as shown in FIGS. 6(A) and 6(B), a piece of the hinge 16 is always pressed downward by the spring force on the foam mold 5. It is possible to change the design such that the set pin 11 is fixed with a screw and the set pin 11 is pressed and locked with the other piece.

Furthermore, as a means for setting the insert part 4 into the foaming mold 5, as shown in FIG. By adopting a configuration in which the component 4 is magnetically attracted, it is possible to eliminate the setting pin on at least one side, and it is possible to improve the workability of setting the insert component 4 and to prevent the generation of wrinkles due to displacement of the skin material 2.

In the above example, the skin-integrated urethane foam product was explained using an armrest as an example, but it should be added that the invention is not limited to armrests and is also applicable to other skin-integrated urethane foam products. .

<Effects of the Invention> As described above, the present invention provides a foam mold with a locking part for positioning a skin material, and removably attaches an engaging member that engages and disengages with the locking part to the skin material. The skin material was inserted into the foam mold, urethane liquid was injected, the engaging member was locked in the locking part, the skin material was positioned in the foam mold, and the mold was closed with or without insert parts loaded. Since this is a method for manufacturing a skin-integrated urethane foam that is subsequently heated and foamed at a required temperature, the upper joint of the skin material will not be pushed and expanded by the foaming of the urethane, and leakage of urethane from the joint is prevented. It is now possible to easily position and fix free parts that are difficult to position and fix within the foam mold, and as a result, we can produce high-quality skin-integrated urethane foam products without urethane leakage, skin wrinkles, or deformation. It has a special effect that can be provided.

[Brief explanation of the drawing]

Fig. 1 is a perspective view showing an embodiment of the present invention, Fig. 2 is an explanatory diagram of the same manufacturing process, Fig. 3 is a sectional view of the same foaming manufacturing state, and Fig. 4 is a perspective view showing an embodiment of the present invention.
The figure is a sectional view of the positioning and fixing means for the free state part provided on the skin material, Figures 5 and 6 are views showing examples of changes in the same design, and Figure 7 is the means for setting the insert part in the foam mold. 8 is a perspective view of an armrest showing an example of the skin-integrated urethane foam manufactured by the manufacturing method of the present invention; FIG. 9 is a sectional view taken along the line IX-IX in FIG. 8;
Fig. 10 is a sectional view showing the conventional manufacturing method, Fig. 11 is an explanatory diagram of defects caused by the conventional manufacturing method, Fig. 12 is a perspective view of the conventional insert part set in the mold, and Fig. 13
The figure is a sectional view of the conventional free state part and the insert part set in the mold, and FIGS. 14 and 15 are explanatory diagrams of the conventional problems. 2...Skin material, 3...Urethane foam, 4...Insert part, 5...Foam mold, 10...Locking part, 11
...Set pin, 12...spring.

Claims (1)

[Claims] A locking part is provided to position the skin material on the foam mold,
An engaging member that engages and disengages from the locking portion is removably attached to the skin material, the skin material is inserted into the foam mold, urethane liquid is injected, the engaging member is locked to the locking portion, and the skin material is removed. A method for producing an integral skin urethane foam, which comprises positioning the foam in a foaming mold, closing the mold with or without loading an insert part, and then heating and foaming at a required temperature.