JPH031938A - Trimming material with stitch pattern and its manufacture - Google Patents

Abstract

PURPOSE:To give feeling of genuine leather to a looker, giving classy feeling and make the stick work easy and simplified by forming a recessed groove with a conver gent bottom section on a section where a stitch pattern of a skin material is provided, sewing yarns on the skin material along said groove and giving the stitch pattern. CONSTITUTION:A skin material 2a constituted by a sheet something like vinyl chloride is press formed on a top force 11 and a bottom force 12 of a mold 10 for molding the skin material 2a of a trimming material. For the purpose of forming a recessed groove 7 on the skin material 2a, projected lines 13..... are provided on the top force 11, while recessed lines 14..... are provided correspondingly to the projected lines 13 on the bottom force 12. Further, recesses and projections are provided to form grain leather pattern 3 on the top force 11, while vacuum suction holes 15..... communi cating respective recessed lines 14 are bored on the bottom force 12, and the recessed grooves 7 are formed sharply by heating the molds 11 and 12 communicating with a vacuum source 16 to heat a sheet and vacuumizing the inside of the recessed lines 14 to manufacture the skin material 2a. Genuine yarns 8a are sewn along the recessed grooves 7 on the skin material 2a thus formed and a stitch pattern 8 is formed thereon.

Description

DETAILED DESCRIPTION OF THE INVENTION (Field of Industrial Application) The present invention relates to an interior material having the same pattern as the surface of leather, which is used for coating the surfaces of automobile interior parts, furniture, etc., and a method for manufacturing the same.

(Prior Art) Conventionally, as a means of improving the aesthetic appearance, the surface of plastic or metal interior parts such as automobile instrument panels, console boxes, door trims, etc. has been coated with so-called leather-dyed patterns, which are the same as leather. In addition to the leather drawing pattern, a material covered with an interior material having a stitch pattern is used. Recently, some products are using real thread in the stitching to further improve the leather-like texture.

For example, in JP-A-83-199 [i40], a thread is placed on a plastic sheet with a leather tie pattern, and the chain thread is partially melted and fixed to the plastic sheet in a dotted line pattern to create a stitch pattern. Also, Japanese Patent Publication No. 63-2799
In No. 45, the sheet material is cut to match the shape of the interior item and sewn together in the same manner as leather to create a stitch pattern.

(Problems to be Solved by the Invention) In the above-mentioned prior art, in the case of plastic sheets with a leather drawing pattern or a stitch pattern, the leather drawing pattern or stitch pattern is transferred to a mold, and the mold is used to apply a vacuum. Molding and slush molding are performed, but it is undeniable that the product transferred from the mold is inferior in terms of texture and appearance compared to the actual leather-dyed pattern and stitching. In particular, in the case of a stitch pattern, the difference in texture is striking because the unevenness has a large level difference, and the sense of difference is remarkable.

Therefore, the above-mentioned invention of JP-A-83-199840 solves this problem by using real thread, but the welding work is not necessarily easy and it is also difficult to hide the thread at the welded part. Not only is it assumed that there is, but the mere presence of stitches does not represent the feeling of stitching leather together.

Furthermore, the invention disclosed in Japanese Patent Application Laid-Open No. 83-279945 has the disadvantage that the sheet must be cut and sewn together, which requires the same effort and skill as using real leather.

(Means for Solving the Problems) The above-mentioned problem of the present invention is that in an interior + O in which a stitch pattern is applied to the surface of a skin material made of a plastic material, the bottom part converges in the part of the skin material where the stitch pattern is applied. This problem is solved by an interior material characterized by forming grooves and sewing threads onto the skin material along the grooves to give a stitch pattern. In addition, the interior material is provided with a protrusion with a sharp tip on the upper die of the mold for molding the skin material, and a concave line is provided on the lower die opposite to the protrusion, and the concave line is connected to a vacuum source. , Pressure forming the skin material while suctioning it into the grooves to form grooves on the surface;
It is manufactured by sewing a thread to the skin material along the grooves to form a stitch pattern, or by providing a ridge on the molding surface of a slush mold and melting and adhering resin powder to the molding surface. It is manufactured by sewing thread along grooves formed by strips to form a stitch pattern.

(Function) Since the above means are provided, the concave grooves provided in the part of the interior material where the stitch pattern is attached simulates the feeling of seams of leather, and the seams along these grooves give the feeling of sewing leather together. Come out strong. When sewing two pieces of leather together, usually after sewing the seam a as shown in Fig. 10 (a), apply the folded cloth tape b to both sides of the edges and stitch C1C as shown in Fig. 10 (b). Fold it to one side as shown in Figure (C) and stitch C only on one side.

Therefore, a concave groove d is formed at the seam, but in the present invention, a concave groove equal to the concave groove d is formed in the plastic sheet, so if stitching is performed with real thread, it will look like the real thing. It feels similar to leather.

In the manufacturing method described above, the bottom of the groove is converged and narrowed by the suction effect of the vacuum source, and is formed into a shape similar to the groove d. In addition, in slush molding, desired grooves are transferred and formed by protrusions provided on the mold.

(Example) Examples of the present invention will be described below with reference to the drawings. FIG. 1 shows an example in which the present invention is applied to an instrument panel 1. The panel 1 is covered with an interior material 2 having a leather drawing pattern 3, and has meter mounting holes 4.4 and operation member mounting holes at appropriate locations. 5. It has holes 6 for storage, etc., and holes are also made in the interior material 2 corresponding to these holes. The interior material 2 is formed so as to fit the three-dimensional shape of the panel 1 by sewing it together at each bent portion of the panel 1, and has a groove 7 and a stitch 8 made of l-thread. Stitches 8 are also provided on the edges 9.

FIG. 2 shows a molding die 10 for molding the skin material 2a of the interior material 2. Between the upper mold 11 and the lower mold 12, the skin material 2a made of a plastic sheet such as vinyl chloride is press-molded. In order to form the concave groove 7 in the skin material 2a, the second
As is clear from Figure (b), the upper die 11 is provided with protrusions 13, and the lower die 12 is provided with grooves 14 corresponding to the protrusions 13.
... will be established. Furthermore, the upper mold 11 has a leather drawing pattern 3.
The lower mold 12 is provided with irregularities to form a
Vacuum suction holes 15 communicating with each of the grooves 14 are bored and the molds 11 and 12 connected to the vacuum source 6 are heated to pressurize the sheet and create a vacuum inside the grooves 14. As a result, the grooves 7 are sharply formed, and the skin material 2a shown in FIG. 3 is obtained.

FIG. 4 shows a slush molding die 18, which has a heating medium passage 20 on the back side of the molding surface 19, a skin drawing pattern on the molding surface I9, and a concave groove forming part. A container 22 is provided with protrusions 21 and faces the molding surface 19.
contains resin powder 23. By heating and rotating the mold 18, a part of the resin powder 12 melts and adheres to the molding surface 19 to form a film body, and the concave grooves 7 are formed by the protrusions 21, forming the skin material 2b in FIG. is formed.

As shown in FIG. 6, real threads 8a are sewn onto the skin material 2a or 2b formed in this way along the grooves 7 to form a stitch pattern 8.

The core material is joined to the skin materials 2a and 2b, but before joining, the seams are sealed from the back side as shown in Fig. 7 in order to prevent the foaming agent etc. from leaking from the seams of the thread 8a. will be carried out. The sealing process is performed by pasting a sealing tape 24 or by applying a crosslinking and curing process by applying an adhesive and drying it. Further, when the stitching thread 8a is made of resin, the joint can be closed by heating and melting the stitch from the back side.

A core material is bonded to each skin material for reinforcement, and the work of adhering the core material to the skin material 2a by press molding is performed using a mold 25 shown in FIG. 8. The mold 25 consists of an upper mold 26 and a lower mold 27. The upper mold 2B is provided with a large number of vacuum suction holes 28, and the skin material 2a is held on the surface of the upper mold by a vacuum source 29.

A core material 30 is fitted onto the lower mold 27, and a heat-activated adhesive is applied to the surface of the core material 30, and the inner material 2 is joined together by applying pressure under heating as shown in FIG. 8(b). It's done.

FIG. 9 shows the work for adhering the core material 30 to the skin material 2b through polypropylene foam by slush molding, and the mold 3I is approximately the same as the mold shown in FIG. It is used in the state of The skin material 2b is fitted onto the lower mold 33 and evacuated, the core material 30 is fitted onto the upper mold 32, the foam material 34 on the back side of the skin material 2b is injected, and the upper and lower molds 32 and 33 are combined. The interior material 2 sandwiching the foam body 35 is formed by foaming and hardening.

Note that a foam can be added to the skin material 2a, and it is also possible to simply adhere a core material to the skin material 2b without using a foam material.

(Effects of the Invention) As described above, in the interior material of the present invention, grooves are formed in the outer skin material to tighten the seams of the leather, and stitching is performed with real thread along the grooves, so that the interior material can be easily seen by the viewer. It has the effect of giving the product the feeling of using real leather and giving it a luxurious feel.

In addition, according to the manufacturing method of the present invention, only stitching is performed with thread along the concave grooves, and there is no need for cutting or sewing, so the number of man-hours is reduced, and the stitching is performed before bonding the interlining. This has the effect that the skin material is not bulky and is easy to handle during stitching work.

[Brief explanation of the drawing]

Fig. 1 is a slope view of an automobile instrument panel in which the present invention is implemented, Fig. 2 (a) is a cross-sectional view of a mold for forming the skin material, (b) is a partially enlarged view, and Fig. 3 is a slope view of the skin material. Figure, 4th
The figure is a cross-sectional view of the slush molding die, Figure 5 is a cross-sectional view of the skin material using the same mold, Figure 6 is a slope view of the skin material with stitches, and Figure 7 is a slope view showing the joint seal structure. Figures 8(a) and 8(b) are cross-sectional views of the mold for bonding core materials when the mold is open and closed, and Figures 9(a) and (b) are cross-sectional views of the mold for bonding core materials using foam material when the mold is open and closed. Cross-sectional view when closed, Figure 1O (a) φ
)(C) is an explanatory diagram of how to sew leather. 2...Interior material 2a, 2b...Skin material 7...
Concave groove 8... Stitch 8a... Thread
13.21...Protrusion 14...Concave 30
... Core material 35 ... 3 people outside the foam Figure 1 Figure 4 Figure 3 Figure 2 Figure 5 Figure 6

Claims (1)

[Claims] 1. In an interior material in which a stitch pattern is applied to the surface of a skin material made of a plastic material, a groove whose bottom converges is formed in the portion of the skin material to which the stitch pattern is applied; An interior material characterized by having a stitch pattern created by sewing threads along the outer skin material. 2. In an interior material in which a stitch pattern is applied to the surface of a skin material made of plastic material, a concave groove whose bottom converges is formed in the part of the skin material where the stitch pattern is applied, and the surface material is attached along the concave groove. An interior material characterized by having a core material attached to the back side of an outer skin material with a stitch pattern attached by sewing thread. 3. The interior material according to claim 2, wherein the interior material and the core material are integrated through a foam. 4. The interior material according to claim 2 or 3, characterized in that a joint seal for sealing the seam is provided on the back side of the stitch. 5. A protrusion with a sharp tip is provided on the upper die of the mold for molding the skin material, and a concave line is provided on the lower die opposite to the protrusion, and the concave line is communicated with a vacuum source. A method for producing an interior material, characterized by forming concave grooves on the surface by pressure molding while suctioning the skin material inside, and sewing threads to the skin material along the grooves to form a stitch pattern. . 6. Protrusions are provided on the molding surface of the slush mold, resin powder is melted and adhered to the molding surface to form a skin material, and threads are sewn to the skin material along the grooves formed by the projections. A method for producing an interior material, the method comprising forming a stitch pattern using