JP3001656B2 - Manufacturing method of seat cover - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for manufacturing a seat cover for a vehicle seat cushion which is manufactured by joining a seat cover and a mold pad.

[0002]

2. Description of the Related Art When a seat cushion is manufactured by bonding a seat cover and a mold pad, conventionally, a plurality of cut pieces are sewn together according to the shape of the seat cushion to form a seat cover. The seat cover is brought into close contact with the molding surface of the mold by vacuuming, or the required part of the seat cover is brought into close contact with the molding surface of the molding die using double-sided adhesive tape. Was adhered to.

[0003]

In the case of the seat cover formed by the above method, if the accuracy of the size and shape of each of the cut pieces or the accuracy of the sewing position of each cut piece is reduced below the limit, the sheet cover cannot be formed into the forming die. Since the set position of the seat cover is displaced, or the entire seat cover does not adhere to the molding surface, the seam of the seat cover is meandered, and the parting position is displaced, thereby deteriorating the appearance and quality of the seat cover. SUMMARY OF THE INVENTION It is an object of the present invention to solve the above problems and improve the finishing accuracy of a seat cover.

[0004]

SUMMARY OF THE INVENTION According to the present invention, when molding a seat cover, a suitable number of divided molds formed by vertically dividing a molding die for the seat cover and forming each part of the seat cover. After each molding, each of the divided molds and the molded pieces respectively molded by the divided molds are united, and then each of the molded pieces sandwiched between the gripping surfaces of the divided molds is superimposed. The vicinity of the edge of the portion is joined to form a joint.

[0005]

The molding die for the seat cover is vertically divided into an appropriate number of divided dies that can be combined, and molded pieces constituting each part of the seat cover are formed by the respective divided dies. In this state, the divided molds and the molded pieces are united, and the overlapped portions of the molded pieces are sandwiched between the gripping surfaces of the divided molds, and the vicinity of the edge of each sandwiched overlapped portion is joined. Then, joints of the molded pieces are formed at the positions of the gripping surfaces of the split dies, respectively.

[0006]

Since the present invention is configured as described above, the positions of the joints of the seat cover can always be fixed to the fixed positions by the gripping surfaces of the split dies, and the molded pieces can be joined. It is possible to improve the finished dimensional accuracy of each molded sheet cover and the positional accuracy of each seam, thereby greatly reducing the variability of the finished size and the position of each seam between the seat covers. Therefore, when manufacturing the cushion body, the seat cover can be accurately set on the molding die and brought into close contact with the molding surface, and the appearance and quality of the seat cover joined to the mold pad can be improved and balanced. Can be In addition, since the molded pieces are joined after being molded, the size and shape of each cut piece to be formed into each molded piece 7 are allowed to vary, thereby improving the size, shape accuracy, and stitching accuracy of each cut piece. Is unnecessary, and the work of cutting the cut pieces can be streamlined.Since the work of sewing each cut piece is unnecessary, the manufacturing process of the seat cover can be streamlined and streamlined. There is an effect that the manufacturing process can be automated and labor can be saved.

[0007]

Next, an embodiment of the present invention will be described with reference to the drawings. First, the first molding die 1 used when molding the seat cover S and the second molding die 3 used when joining the seat cover S and the mold pad will be described.

The first molding die 1 for the seat cover includes a middle split mold 2A set at a fixed position for molding a molding piece 7A for the top plate near the center of the seat cover S, and a first molding die 1 for the seat cover S. Molded pieces 7B for the left and right side portions on both sides,
Left and right horizontal split molds 2B and 2C installed on both sides of the middle split mold 2A so as to be able to move in the left and right directions respectively to mold 7C, and molded pieces for the rear band of the rear end of the seat cover S. 7D is vertically divided into a rear split mold 2D movably installed in the front-rear direction on the rear side of the middle split mold 2A, and the split molds 2A to 2D are united to form an outer shape of the entire seat cover S. The shape is as follows. Each of the split molds 2A to 2D is provided with a ventilation hole 11 for evacuation, and a part of the side face of each of the split molds 2A to 2D has a split mold 2A.
The gripping surfaces 4 facing each other when .about.2D are united are formed vertically.

[0009] The first molding die 1 is used to make the first and second inverted sheet covers S adhere to each other.
A molding surface 3a having a concavo-convex shape obtained by reversing the concavo-convex shape of the molding surface of the molding die 1 is formed, and a ventilation hole 3b for evacuation and for feeding steam during heating is formed in the second molding die 3. Has been established.

Next, a method of manufacturing the seat cover S and a method of manufacturing the seat cushion will be described. First, a sheet cover material such as a vinyl chloride leather or a skin material in which a breathable film is laminated on the back surface of a fabric is cut according to each shape of each of the split molds 2A to 2D to produce four cut pieces. .

Then, the two horizontal split molds 2B and 2C and the rear split mold 2D are respectively moved to positions separated from the middle split mold 2A, and each cutting piece is clamped by the clamp 6 while each cutting piece is clamped. Each piece is divided into 2A-2
D, and then lowered and set individually in each of the divided dies 2A to 2D corresponding to the respective cutting pieces. In this state, each of the cutting pieces is evacuated to form a top plate forming piece 7A. , Molded pieces 7B, 7C for left and right side parts
And a forming piece 7D for the rear band portion are formed (see FIGS. 3 and 4). However, the molding pieces 7A to 7D may be molded simultaneously or sequentially.

Next, the left horizontal split type 2B is moved rightward, the right horizontal split type 2C is shifted leftward, and the rear split type 2B is moved.
D is moved forward to form each of the split molds 2A to 2D and each of the molded pieces 7A to 7M formed by each of the split molds 2A to 2D.
7D are combined with each other, and a part of the hanging part of each of the molded pieces 7A to 7D is overlapped and closely overlapped with each other.
Is gripped by being sandwiched between both gripping surfaces 4 of the split dies 2A to 2D facing each other (see FIGS. 5 and 6).

Subsequently, the vicinity of the edge of each overlapped portion 8 sandwiched between the opposed gripping surfaces 4 is respectively joined by, for example, a high-frequency welder 9 to form a seam 10, whereby the molded pieces 7A to 7D are joined to each other. The seat cover S joined at the seam 10 can be manufactured. The seam 10 can be formed by a bonding method of heating and melting the hot melt adhesive applied to the overlapping portion 8 or a heater fusion method, in addition to the method using the high frequency welder 9.

Thereafter, the seat cover S is removed from the first molding die 1 and removed from the mold. Then, the removed seat cover S is turned upside down and set on the second molding die 3 (see FIG. 7).
Further, the seat cover S is evacuated to be in close contact with the molding surface 3a of the second molding die 3, and the mold pad 13 superimposed on the seat cover S is pressurized and joined to the seat cover S, and the seat cushion body is removed. Make it.

Next, the operation and effect of the embodiment having the above configuration will be described. In the present embodiment, when forming the seat cover S, a suitable number of divided molds 2A to 2D formed by vertically dividing the first molding die 1 for the seat cover and forming pieces 7A constituting each part of the seat cover S are formed. To 7D, and then each of the split molds 2A to 2D and each of the split molds 2A to 2D.
Each of the molded pieces 7A to 7D molded in A to 2D is united, and then the gripping surface 4 of each of the divided dies 2A to 2D is formed.
The joints 10 are formed by joining near the edges of the overlapping portions 8 of the molded pieces 7A to 7D sandwiched therebetween.

Therefore, each joint 10 of the seat cover S
Is always fixed to a fixed position by the gripping surface 4 of each of the split dies 2A to 2D so that the molded pieces 7A to 7D can be joined together. By improving the positional accuracy, the variation of the finished dimension between each seat cover S and the
Can be greatly reduced.

Therefore, when the seat cover S molded by the first molding die 1 is set on the second molding die 3 to manufacture a cushion, the seat cover S is accurately set on the second molding die 3. It can be accurately adhered to the molding surface 3a,
The appearance and quality of the seat cover S bonded to the mold pad 13 can be improved and leveled.

Further, since the molded pieces 7A to 7D are joined after molding, variations in the dimensions and shapes of the cut pieces formed into the molded pieces 7A to 7D are allowed, and the dimensions, shape accuracy and Since a measure for improving the sewing accuracy is not required, the cutting work of the cut pieces can be streamlined, and the work of stitching the cut pieces is unnecessary, so that the manufacturing process of the seat cover S is streamlined and streamlined. In addition, there is an effect that the manufacturing process of the seat cover can be automated and labor can be saved.

[Brief description of the drawings]

FIG. 1 is a perspective view showing one embodiment of the present invention and showing a state where a seat cover is removed from a first molding die.

FIG. 2 is a perspective view of a first molding die.

FIG. 3 is a perspective view showing a state in which each molding piece is molded by each split mold.

FIG. 4 is an enlarged sectional view taken along line X1-X1 of FIG. 3;

FIG. 5 is a perspective view showing a state in which each split mold and each molded piece are united.

FIG. 6 is an enlarged sectional view taken along line X2-X2 in FIG. 5;

FIG. 7 is a perspective view showing a state where a seat cover is set on a second molding die.

FIG. 8 is a vertical cross-sectional view illustrating a bonding step between the seat cover and the mold pad.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 1st shaping | molding die 2A, 2B, 2C, 2D Split mold 4 Holding surface 7A, 7B, 7C, 7D Shaping | molding piece 8 Overlapping part 10 Seam S Seat cover

──────────────────────────────────────────────────続 き Continued on the front page (58) Field surveyed (Int. Cl. ⁷ , DB name) B29C 65/00-65/78 B68G 7/05, 7/12

Claims (1)

(57) [Claims] An appropriate number of divided molds formed by vertically dividing a molding die for a seat cover are used to form molding pieces constituting each part of the seat cover, and then each of the divided molds and each of the divided molds are formed. The respective molded pieces formed by the respective split dies are united respectively, and then the vicinity of the edge of each overlapped portion of each of the formed pieces sandwiched between the gripping surfaces of the respective split dies is respectively joined to form a joint. A method of manufacturing a seat cover.