JPS63290728A - Manufacture of soft material skin product with recessed surface - Google Patents

Abstract

PURPOSE:To vacuum mold an air-permeable skin without the process of stopping air-permeation, and manufacture the same easily in a mass production by vacuum molding without lowering the characteristics of the soft material skin by backing only, the area around the rear surface of a recessed surface of the soft material skin with a shape retaining resin sheet. CONSTITUTION:An air-permeable soft material skin 12 is placed on a molding die 16 having a corresponding mold face 14 so that the skin surface side is faced thereto. A bonding agent 18 is applied on the back surface of the soft material skin 12. A shape retaining resin sheet 20 constituted of thermoplastic resin such as ABS resin, vinyl chloride or the like is piled up on the soft material skin 12 on the molding die 16., The shape retaining sheet 20 is formed in a form almost equal to the section for the recessed surface molding, and placed on the section for the recessed surface molding of the soft material skin after being heated and softened prelimiarily. Since shield is insufficient and vacuum pressure is does not work effectively in the vacuum molding in a state that the shape retaining resin sheet 20 is piled up with a part of the air-permeable soft material skin 12 to cover the soft material skin partly, a shield sheet 22 is applied over the shape retaining resin sheet 20 and the soft material skin 12.

Description

[Detailed Description of the Invention] [Industrial Application Field] This invention provides a core material with an integrated concave structure, an elastic body,
[Prior art and its problems] Concerning a soft material skin product with a concave surface that is coated and combined with a soft material skin such as leather, and its manufacturing method [Prior art and its problems] Natural leather such as cowhide leather, textiles, BACKGROUND OF THE INVENTION Soft-wood skin products, which are coated with soft-wood skins such as knitted fabrics and non-woven fabrics, are widely used for vehicle interior parts such as door panels and instrument panels, furniture such as reception sets, and the like. In such softwood skin products, a part thereof is often provided with a concave surface for a handle, a passage, etc.

A softwood skin product with such a concave structure is usually produced as follows. First, an elastic body made of a soft material is bonded to a core material made of a hard material using an adhesive or the like.
be integrated. Here, a concave surface is provided on the surface by cutting out a part of the elastic body or not adhering the elastic body to a part of the core material. Then, the softwood skin is coated on the core material and the elastic body, and the softwood skin is combined to produce a softwood skin product with a concave structure.

A well-known method for mass-producing softwood skin products having such a concave structure is to laminate a sheet made of a thermoplastic resin material on the back side of a softwood skin. In this method, a soft material skin layered with a thermoplastic sheet on the back side is heated and molded. Then, the molded softwood skin is adhered to the core material and the elastic body with an adhesive or the like to cover and combine them.

However, in such a known manufacturing method, as shown in FIG. 7, the thermoplastic sheet 50 is usually laminated as a backing material over the entire surface of the softwood skin 112, so that the softwood skin is completely hardened. . Therefore, the properties of the softwood skin 112, such as softness, smooth texture, and elasticity, are significantly reduced. Therefore, it is not possible to obtain a soft material skin product 110 with a concave surface that takes full advantage of the characteristics of the soft material skin. Note that reference numeral 128 represents a core material and 130 represents an elastic body.

On the other hand, by adhering the softwood skin to the surface of the core material or elastic body, or by pressing the softwood skin against the core material or elastic body with a mold, or
A manufacturing method is also known in which a soft wood skin, an elastic body, and a core material are drawn into a mold using vacuum pressure. This method does not use a thermoplastic sheet, so there is no risk of losing the properties of the softwood skin. It is not suitable for use with air-permeable soft materials such as woven, knitted, and non-woven fabrics, and it is difficult to obtain products of uniform quality due to the large number of manual processes. Only later can molding using vacuum pressure be performed.

[Purpose of the invention]

The present invention provides a softwood skin product with a concave surface that can be molded by vacuum forming into an air permeable softwood skin without applying air-blocking processing, and can be easily produced in one batch without deteriorating the properties of the softwood skin, and the same. Regarding the manufacturing method.

[Summary of the invention]

In order to achieve this object, according to the present invention, only the periphery of the concave back surface of the softwood leather is lined with a shape-retaining resin sheet,
According to the manufacturing method of the present invention, which constitutes a concave-surfaced softwood skin product, the breathable softwood skin is placed on the mold surface of a vacuum molding die so that the surface side faces. Then, an adhesive is applied to the back surface of the portion of the softwood skin where the concave surface is to be formed. Then, a shape-retaining resin sheet having approximately the same shape as the portion to be concavely molded is preheated and softened, and then placed on the soft material skin. A shield sheet is placed over the shape-retaining resin sheet and the soft material skin to shield the shape-retaining resin sheet and the soft material skin so that they can be vacuum-formed. Then, by applying vacuum pressure to the vacuum forming mold and suctioning the soft material skin and shape-retaining resin sheet, the soft material skin and shape-retaining resin sheet are molded into a concave shape, and the shape-retaining resin sheet becomes the soft material surface. is glued to the concave surface of the Then, the softwood skin is removed from the mold, the shape-retaining resin sheet is placed inside, the softwood skin is covered with the core material and the elastic body, and when combined, the desired softwood skin product with a concave surface is obtained. Complete.

〔Example〕

Embodiments of the present invention will be described in detail below with reference to the drawings.

A concave soft material skin product 10 according to the present invention is shown in FIG. 1, and this concave soft material skin product IO is manufactured as follows. According to the manufacturing method of the present invention, the breathable soft material skin 12 made of woven fabric, knitted fabric, nonwoven fabric, etc. can be vacuum-formed without being subjected to air-blocking processing, even though it has air permeability.

First, as shown in FIG.
is placed on the mold 1SH having a mold surface 14 of a corresponding shape so that its surface side faces. Then, the adhesive 18 is applied to the back surface of the soft material skin 12 (in the figure, the front and back are reversed, and the back surface is the top surface). The adhesive 18 is
It is sufficient to coat a portion of the soft material skin 12 to be formed into the concave surface 13 (see FIG. 1), that is, the portion where the concave surface is to be formed.

A shape-retaining resin sheet 20 made of a thermoplastic resin such as ABS resin or vinyl chloride is stacked on the soft material skin 12 on the mold 16 (see FIGS. 2 and 3). , is formed in a shape approximately equal to the part to be concavely molded, and is heated and softened in advance, and then placed on the part to be concavely molded of the softwood skin. Note that it is preferable to apply a heat-activated adhesive to the shape-retaining resin sheet 20 in advance.

If the shape-retaining resin sheet 20 is overlapped with a part of the breathable soft material skin 12 (the part scheduled for concave molding) and partially covers the soft material skin, the shielding will be insufficient, and the vacuum pressure will not be high during vacuum forming. Does not work effectively.

Therefore, to ensure sufficient shielding, the shield sheet 22 is placed over the shape-retaining resin sheet 20 and the soft material skin 12 (see FIGS. 2 and 3).
As No. 2, for example, a #thermal rubber sheet with a thickness of about 0.8 mm can be used. In addition, a suction seal piece 23 is attached to the edge of the shield sheet 22, and this suction seal piece is attached to the base 24.
Alternatively, it may be adsorbed onto the surface of the soft material skin 12 to improve shielding properties.

Then, a vacuum source such as a vacuum pump is activated to apply vacuum pressure (-P) to the multi-wavelength path 2B of the mold. Then, the soft material skin 12 and the shape-retaining resin sheet 20 are sucked onto the mold surface 14 while keeping the shield sheet 22 in close contact with the surface, and are molded into a concave shape as shown in FIG. The shape-retaining resin sheet 20 formed into a concave shape is adhered to the concave surface 13 of the soft material skin by an adhesive 18 on the soft material skin, and is integrated on the concave surface. During molding, if necessary, steam, hot air, or the like may be supplied to heat the shape-retaining resin sheet 20 to promote molding of the shape-retaining resin sheet.

After the soft material skin 12 and the shape-retaining resin sheet 20 are molded into a concave shape and the shape-retaining resin sheet is cured, the vacuum pump is stopped and the vacuum state is released. Then, except for the shield sheet 22, the soft material skin 12 with the holding resin sheet 20 attached only to the concave surface 13 does not lose its shape, and the molding die 16
left behind. The shape-retaining resin sheet 20 is attached to the concave surface 1 of the softwood skin.
3 and is hardened, the soft material skin 12 does not lose its shape and is maintained in the molded shape even when removed from the mold 16.

On the other hand, the core material 28 made of a hard material and the elastic body 30 made of a soft material are integrated with the soft material skin 12 by an appropriate method, such as an adhesive or the self-adhesive force of integral foaming of polyurethane foam. The concave surface 31 corresponding to the concave surface 12 of the softwood skin, which is prepared separately (see FIG. 5), should not cut out a part of the elastic body 30 or bond the elastic body to a part of the core material 28. is provided on the surface of the elastic body and core material.

Then, the soft material skin 12 removed from the mold 1B,
The core material 28 and the elastic body 30 are combined to complete the desired softwood skin product 10 having a concave structure.For example, as shown in FIG. 6, the adhesive 18 is applied to the upper surface. The core material 28 and the elastic body 30 are layered with the soft material skin 12 with the shape-retaining resin sheet 20 inside, and the core material 28 and the elastic material are The body 30 and the softwood skin 12 may be combined, thus producing the concave softwood skin product l shown in FIG.
O is obtained.

As described above, according to the method of the present invention, a shape-retaining resin sheet having a shape approximately equal to the concave molding portion of the softwood skin is
Breathable soft material skin 12 in a preheated and softened state
The shield sheet 22 is placed on top of the shield sheet 22, and is further covered entirely with a shield sheet 22. Therefore, sufficient shielding is ensured, and the skin of highly breathable soft materials such as woven, knitted, and non-woven fabrics1
2, it is also possible to perform vacuum forming without performing ventilation blocking processing. The shape-retaining resin sheet 20 is formed into a concave shape at the same time as the soft material skin 12, and is further bonded to and integrated with the soft material skin using the adhesive 18 on the soft material skin. Therefore, even after being removed from the mold 16, the soft material skin 12 does not lose its shape and is maintained in the molded shape. Then, in the next process, the soft material skin 12 that is maintained in the molded shape is transferred to the core material 28 without taking any special measures to prevent it from losing its shape.
, can be combined with the elastic body 30. Therefore, the process of combining can be performed quickly, easily, and uniformly without variation, resulting in a low-cost, uniform, and high-quality softwood skin product with recesses.
O is mass produced.

Furthermore, compared to the conventional method in which a thermoplastic sheet is laminated over the entire back surface of the softwood skin, the method of the present invention laminates the shape-retaining resin sheet 20 only around the concave surface 13 of the softwood skin. Therefore, except for the area around the concave surface 13 of the softwood skin, the characteristics of the softwood skin 12, such as softness, smooth texture, elasticity, etc., are maintained, and the characteristics of the softwood skin are fully maintained. A soft wood skin product 10 with a concave surface that takes full advantage of this is obtained.

In the concave softwood skin product IO of the present invention, since the shape-retaining resin sheet 20 is disposed around the concave surface 13 of the softwood skin, even after it is removed from the mold IB, the softwood skin remains intact. No. 12 does not lose its shape and is maintained in the molded shape. Therefore, in the next step, the soft material skin 12 can be combined with the core material 28 and the elastic body 30 without taking any special measures to prevent deformation. Therefore, the concave surface soft material skin product 10 having such a configuration can be easily mass-produced.

In addition, except for the area around the concave surface 13 of the softwood skin, the softwood skin 1
The above-described embodiments in which the characteristics of No. 2 are maintained without being lost are for illustrating this invention, and do not limit this invention in any way, and may be modified or modified within the technical scope of this invention. It goes without saying that all such devices are also included in the present invention.

For example, the method of combining the softwood skin 12, the core material 28, and the elastic body 30 is not limited to the method of the embodiment, and other methods can be used as appropriate.

〔Effect of the invention〕

As described above, according to the manufacturing method of the present invention, even highly breathable soft material skins such as woven fabrics, knitted fabrics, and nonwoven fabrics can be formed into a concave shape by vacuum forming without being subjected to air-blocking processing.

After molding, the soft material skin is combined with the core material and the elastic body without taking any special measures to prevent the material from losing its shape. Therefore,
The merging process can be performed quickly, easily, and uniformly, making it possible to mass-produce uniform, high-quality softwood skin products with recesses at low cost.

In addition, the shape-retaining resin sheet was only attached around the concave surface of the softwood skin, so except for a part (around the concave surface of the softwood skin), the softness, smooth feel, elasticity, etc. The properties of softwood skin are well maintained.

In the concave softwood skin product of the present invention, the characteristics of the softwood skin are fully utilized. In addition, the soft wood skin can be combined with the core material and the elastic body without taking any special measures to prevent deformation, and mass production can be easily achieved.

[Brief explanation of drawings]

Figure 1 is a vertical cross-sectional view of the soft material skin product for the concave member as a completed product. Figure 2 is the soft material skin, shape-retaining resin sheet, and shield sheet stacked on a vacuum mold for molding. Fig. 3 is a vertical cross-sectional view of the soft wood skin, shape-retaining resin sheet, and shield sheet showing the state immediately after vacuum forming. Fig. 4 shows the soft wood skin and shape-retaining resin immediately after vacuum forming. Figure 5 is a vertical cross-sectional view of the sheet and shield sheet; Figure 5 is a vertical cross-sectional view of the integrated core material and elastic body; Figure 6 is a vertical cross-sectional view of the softwood skin, core material, and elastic body before they are combined. FIG. 7 is a longitudinal cross-sectional view of a known concave soft material skin product in which a thermoplastic sheet is laminated on the entire surface as a backing material. lO: Softwood skin product with concave surface, 12: Softwood skin, 13: Concave surface of softwood skin, 16: Vacuum forming mold, 18: Adhesive, 2
0: shape-retaining resin sheet, 22: shield sheet, 28: core material, 30: elastic body. Figure 11. ,/D Figure 2 Figure 3 P Happy Figure 4

Claims (2)

[Claims] (1) A concave softwood skin product in which a core material and an elastic body with a concave structure are coated with a breathable softwood skin, in which a shape-retaining resin sheet is lined only around the concave surface of the softwood leather. Wood skin products. (2) In the method of manufacturing a softwood skin product with a concave structure by coating an integrated concave structure core material and elastic body with a breathable softwood skin, the surface side is Place the softwood skin so that it is facing up, apply adhesive to the back side of the part of the softwood skin that is planned to be concavely molded, form it into a shape that is approximately the same as the part of the softwood skin that is planned to be concavely molded, and preheat and soften it. Layer the shape-retaining resin sheet over the concave molding area of the softwood skin, cover the shape-retaining resin sheet and the softwood skin with a shield sheet, and apply vacuum pressure to the vacuum molding mold. , the soft wood skin and the shape-retaining resin sheet are suctioned, thereby forming the soft wood skin and the shape-retaining resin sheet into a concave shape, and the shape-retaining resin sheet is adhered to the concave surface of the soft wood skin and removed from the mold. Place the removed softwood skin on the core material and elastic body with the shape-retaining resin sheet inside.
A method for manufacturing coated and integrated concave softwood products.