JP6061694B2 - Manufacturing method of seat pad with duct - Google Patents

Description

  The present invention relates to a seat pad that constitutes a vehicle seat, and relates to a method of manufacturing a duct-containing seat pad in which a duct is integrated by insert molding.

There are seat pads that constitute a seat portion and a backrest of a seat that is mounted on a vehicle such as an automobile. The occupant sits on the seat pad and often feels sweat when the spot is hot in the summer and cold in the cold winter. As one of the improvement measures, for example, a duct-containing seat pad in which a seat pad is integrally foamed by inserting a temperature adjusting duct has been proposed (Japanese Patent Laid-Open No. 3-297414, etc.). However, when the foam pad is used and the seat pad is integrally foamed by embedding the duct, the foam raw material enters the duct by simply closing the duct vent against the mold surface. Since the foaming pressure at the time of foam molding is also increased, if the vent hole is not sufficiently blocked, a foaming raw material enters the pipe from the vent hole at the time of foam molding. Even if the foam raw material that has entered the pipe is removed by post-processing, it is after molding of the commercialized seat pad, and it is difficult to perform post-processing while ensuring product quality.
Therefore, the present applicant has previously proposed an invention in which measures are taken so that foaming raw materials do not enter the duct from the vent when the duct is inserted and the seat pad is integrally foamed (Patent Document 1).

JP 2012-105816 A

However, in the invention of Patent Document 1, by closing the mold, the protrusion of the foaming mold enters into the air inlet or the air outlet and closes the air inlet or the air outlet. Since it is an invention that prevents it from entering the duct, measures before mold closing were insufficient.
In the case of manufacturing a seat pad that is integrally foamed by inserting a duct, when the duct 2 is set on the lower mold 7a as shown in FIG. Thereafter, when the foaming raw material m is injected in the injection step of FIG. 6, the foaming raw material m may enter the duct 2 from the air inlet 26e. Even if the injection hose h in the figure is moved away from the air intake port 26e as shown by the arrow, there is a problem that the injection hose h sometimes enters the duct from the port. Furthermore, if foaming raw material is applied to the flange joint surface, it interferes with joining with the mating member, so this has to be removed. In addition, after the production of the duct-padded seat pad, there is a problem that dust, dust and the like enter from the large air intake port compared to the air outlet.

  The present invention solves the above-described problem. When a seat pad is integrally foam-molded by inserting a duct, the foam material is fed from the air inlet into the duct not only in the foam molding process but also in the foam material injection process. It is an object of the present invention to provide a method of manufacturing a ducted seat pad that cannot be penetrated and further improves quality and productivity.

In order to achieve the above object, the gist of the invention described in claim 1 is a method of manufacturing a duct-padded seat pad in which an air distribution duct (2) is embedded, and includes an air inlet (26e) and an air outlet ( Set the air distribution duct (2) with 25a) on the lower mold (7a) of the foam mold (7), and close the air intake (26e) facing upward with the seal tape (4). Next, injection of the foaming material (m) and mold closing, and then, after the integral foam molding of the seat pad (1) in which the duct (2) with the sealing tape (4) is inserted, the mold is removed, and then In the method of manufacturing a seat pad with a duct that peels off the seal tape (4) and opens the air intake port (26e), the cylindrical member (26) that forms the air intake port (26e) is connected to the mating member. The flange (27) is provided , and the flange (27) is recessed from the joint surface (27a) side with the mating member toward the opposite surface (27b) side (272 And the recess (272) is opened at the outer peripheral edge (271a) of the flange (27), and the open portion (272k) is confined from the recess (272) on the air inlet (26e) side. and narrower in section shape, the air inlet in the sealing tape (26e) (4) infarction Gutotomoni, the seal tape is the recess (272) is covered with a floating state to said open portion (272K) way to Kutsugaechaku the bonding surface (27a) with a mating member of the flange (27), the duct containing sheet manufacturing method of a pad, which comprises attaching the seal tape (4) on the joint surface is there.
The gist of the invention described in claim 2 is a method of manufacturing a duct-padded seat pad in which a duct for air distribution (2) is embedded, and for air distribution having an air inlet (26e) and an air outlet (25a). The duct (2) is set on the lower mold (7a) of the foaming mold (7), and the air intake port (26e) facing upward in the set is closed with the sealing tape (4), and then the foam raw material (m ) Injection and mold closing, and then, after the integral foam molding of the seat pad (1) in which the duct (2) with the sealing tape (4) is inserted, the mold is removed, and then the sealing tape (4) In the method of manufacturing a duct- equipped seat pad that opens the air intake port (26e), a flange (27) connected to the mating member is provided on the cylindrical portion (26) that forms the air intake port (26e). and the flange (27) to the air inlet from the outer peripheral edge (271a) to form a (26e) enters into the side recess (274), said air inlet (26e) The seal tape (4) in infarction Gutotomoni, the sealing tape (4) so as to cover up the recessed (274) to Kutsugaechaku the bonding surface (27a) with a mating member of the flange (27), said joint In the method of manufacturing a ducted seat pad , the sealing tape (4) is adhered to the surface (27a) .

As in the first aspect of the invention, the air inlet (26e) facing upward in the set is closed with the sealing tape (4), and then the foaming raw material (m) is injected and the mold is closed, and the duct with the sealing tape (4) ( When the process proceeds to the integral foam molding of the seat pad (1) with 2) inserted, the air inlet is sealed with a sealing tape, so the foam material is not only used in the foam molding process but also in the injection process. Can be prevented from entering the duct. Also, after the integral foam molding of the seat pad (1) in which the duct (2) with the seal tape (4) is inserted and removed from the mold, the seal tape (4) is peeled off, unless the seal tape is peeled off. There is no entry of dust, dust, etc. into the duct through the air inlet from the outside. When the air inlet (26e) is closed with the seal tape (4), and the seal tape (4) is further adhered to the joint surface of the flange (27) with the mating member , The foaming raw material can be prevented from adhering to the stuck flange surface . Forming the recess (272), with the sealing tape (4), with the recess (272) floating, and covering the joint surface (27a) with the mating member of the flange (27), the foaming raw material In the injection process and the foam molding process, since the foaming raw material does not adhere to the entire surface of the flange, the flange can be used as it is as a joint surface with the mating member. Further, when the seal tape is covered with the flange in a state where the recess is floated, the joint portion between the seal tape and the flange surface is reduced, so that the seal tape is easily peeled off . Said air inlet (26e) sealing tape (4) in infarction Gutotomoni, when the sealing tape wherein the recess (272) is to cover in floating state to the open portion (272K), sealing tape ducted mixed sheet after demolding of the pad, insert a finger or the like in the open portion of the under seal tape, Ru which can be a simple peel off if lifted sealing tape.
When the recess (274) is formed and the air inlet (26e) is closed with the seal tape (4) and the seal tape (4) covers the recess (274) as in the invention of claim 2 , After removing the duct-equipped seat pad with tape, put the finger or the like into the dent under the seal tape and lift it up to easily peel off the seal tape.
As in the invention of claim 3, a pinhole (45) or a perforation (46) is provided in a portion of the seal tape (4) that closes the air intake port (26e), and the air intake port (26e) is connected to the seal tape. When closed with (4), the finger can be pushed into the pinhole or perforation and the sealing tape can be easily peeled off, leading to improved workability.

  The method of manufacturing a seat pad with a duct according to the present invention is not only in the foam molding process but also in the foaming material injection process, and is fully capable of preventing the foaming material from entering the duct. It plays the role of a curing tape that prevents dust and dust from entering the duct from the air inlet, and since the sealing tape is easy to peel off, it exhibits excellent effects in improving quality and improving workability.

It is explanatory drawing sectional drawing which made the foam molding die into the mold open state with one form of the manufacturing method of the sheet pad with a duct . FIG. 2 is an explanatory cross-sectional view in which a duct of a reference form is set in the foaming mold of FIG. 1. It is the III-III arrow directional view of FIG. It is a perspective view of the duct of the reference form seen from the back side. It is a front view of the duct of the reference form seen from the surface side. It is explanatory sectional drawing which shows the injection | pouring process of a foaming raw material. FIG. 7 is an explanatory sectional view in which the mold is closed after the injection step of FIG. 6. It is explanatory sectional drawing which shows the foam molding process after a mold closing. It is the surface side perspective view of the sheet pad with a duct of a reference form taken out by demolding. FIG. 10 is a view taken along the line X-X in FIG. 9. (A) is a rear perspective view of FIG. 9, (b) is a partially enlarged view of (b), and (c) is a view taken along line XI-XI of (b). It is explanatory drawing which peeled off the sealing tape from each figure of FIG. In the perspective view around the seal tape of the reference form that closes the air inlet, (a) is the one with perforations, (b) is with pinholes, (c) is the perforation with (a) FIG. 5 is an explanatory cross-sectional view in which the finger is pushed through and the finger is pushed into the duct. It is a fragmentary perspective view of the duct of this invention which provided the recess in the flange. It is a fragmentary perspective view of the duct of another aspect which provided the dent in the flange.

Hereinafter, the manufacturing method of the sheet pad with a duct concerning the present invention is explained in full detail. FIGS. 1-15 is a form of manufacturing method of the duct containing the seat pad, FIG. 1 is an explanatory sectional view thereof foam molding mold to mold open state, the foam molding mold of Figure 2 Figure 1 the duct reference embodiment FIG. 3 is a sectional view taken along the line III-III in FIG. 2, FIGS. 4 and 5 are a perspective view of the duct of the reference form seen from the back side, a front view seen from the front side, and FIG. description sectional view of the injection process, FIG. 7 is mold closing description sectional view, FIG. 8 is an explanatory cross-sectional view of a foam molding step, Fig. 9 is a surface of the sealing tape ducted mixed sheet pad reference embodiment taken in demolding FIG. 10 is a perspective view taken along the line XX of FIG. 9, FIG. 11 is a rear perspective view of FIG. 9 and an explanatory view around the sealing tape, and FIG. 12 is an explanatory view in which the sealing tape is removed from the respective views of FIG. FIG. 13 is an explanatory view around the air intake port, and FIGS. 14 and 15 are partial perspective views of the flange of the present invention . 10 omits the illustration of the backing material 3, and FIGS. 11 to 13 omit the hatching showing the cross section of the backing material 3.

In the manufacturing method of the seat pad with duct, first, the air distribution duct 2 is set on the lower mold 7 a of the foaming mold 7, and the air intake port 26 e facing upward in the set is closed with the seal tape 4. Next, the foaming raw material m is injected and the mold is closed, and the integral foam molding of the seat pad 1 in which the duct 2 with the seal tape 4 is embedded is finished, and the mold is removed. Thereafter, the sealing tape 4 is peeled off and the air intake port 26e is opened.
The seat pad with a duct is used for a seat portion of a vehicle seat and a seat cushion of a backrest. Here, it applies to the seat pad with a duct for the seat part for vehicle seats. If the skin is covered, a vehicle seat is formed by a known backrest and a known headrest.

Prior to this production method, a foam molding die 7 and a duct 2 (here, a duct 2 of a reference form) are prepared.
The foaming mold 7 includes an upper mold 7b and a lower mold 7a as shown in FIG. The upper mold is opened by using the hinge 7c as a fulcrum to make the mold open. However, when the mold is closed, the mold surface 71 of the lower mold 7a having a large degree of dent and a generally flat upper mold with a part of the recess. The cavity 70 of the sheet pad with a duct with a seal tape is made with the mold surface 76 of 7b (FIG. 7). In this manufacturing method, the seat pad surface 1a side is molded by the mold surface 71 of the lower mold 7a, and the seat pad back surface 1b side is molded by the mold surface 76 of the upper mold 7b.
In the lower mold 7a, the upper half mold surface of the seat pad main portion 12 shown in FIG. The lower die 7a is provided with a plurality of raised portions 72 for forming each air outlet 10 on the seat pad surface 1a side by raising each part of the mold surface for the main portion 12 in a column shape (FIGS. 1 and 10). ). Each raised portion 72 flattens the upper end surface 72a.

The duct 2 is a resin tubular member made of polypropylene resin or the like, and is provided with an air inlet 26e and an air outlet 25a in the duct path. 4 and 5 show a duct 2 of a reference form, which is a blow-molded duct 2 having an air distribution channel 29 that is substantially H-shaped in a plan view , and a pair of vertical pipes from both ends of a horizontal cylinder portion 23 arranged in the vehicle width direction. The cylinder portion 24 extends in the vehicle front-rear direction. The duct 2 is provided with a plurality of short nozzle portions 25 on the surface side with respect to the horizontal tube portion 23 and the vertical tube portion 24, and the front end opening of each nozzle portion 25 serves as an air outlet 25a. On the other hand, one air intake port 26 e is provided on the back side of the duct 2. Specifically, the introduction portion 22 projects substantially horizontally or slightly upward from the approximate center of the horizontal cylinder portion 23 related to the duct 2. The introduction portion 22 is bent toward the back side at the tip, and becomes a cylindrical portion 26 that is extended as it is to form an air intake port 26e. The duct 2 at the time of setting to the foaming mold 7 has the horizontal cylinder part 23, the vertical cylinder part 24, and the introduction part 22 which are the duct main part 21 on substantially the same horizontal plane. 26 stands up toward the back side. And the flange 27 is provided in the cylindrical part 26 around the air inlet 26e.
The flange 27 is a connecting portion for connecting to a mating member, and the rear view is substantially semicircular as shown in FIGS. The flange 27 includes a flat flange main portion 271 when viewed as a whole, and a return portion 273 that warps at the outer peripheral edge and extends to the opposite surface 27b side of the joint surface related to the flange. Although the flange main portion 271 is generally flat, a concave portion 272 that is recessed from the joint surface 27a side with the mating member of the flange toward the opposite surface 27b side is partially formed. A plurality (two in this case) of crescent-shaped recesses 272 recessed in a semicircular cross section are provided so as to surround the air intake port 26e. The joint surface 27 a with the mating member of the flat flange is a surface that is substantially orthogonal to the tube center axis of the tube portion 26. Reference numeral 275 denotes a bolt mounting hole with a mating member.

  In the manufacturing method of the seat pad with duct, first, the foaming mold 7 is opened (FIG. 1). The foaming mold 7 in each figure is a mold cross-sectional view showing the cavity 70 according to the seat pad 1 in the XX line view of FIG. 9, and the duct 2 set in the lower mold 7a passes through its central axis. FIG. 2 is a sectional view of a mold cut in the vehicle longitudinal direction as shown in FIG.

Next, the air distribution duct 2 having the air inlet 26e and the air outlet 25a is set on the lower mold 7a of the foaming mold 7, and the air inlet 26e facing upward in the set is closed with the seal tape 4. (FIGS. 2 and 3). In the present invention, “the duct 2 is set in the lower mold 7a and the air intake port 26e is closed with the seal tape 4” does not matter in the time series order in which the duct is set in the lower mold and the air intake port is closed with the seal tape. .
The air distribution duct 2 having the air inlet 26e and the air outlet 25a in the duct path is set on the lower mold 7a. Here, the air inlet 26e is previously sealed with the seal tape 4 and attached to the flange 27. A duct 2 with a seal tape 4 is prepared. The duct 2 distributes the air-conditioning air introduced from the blower unit (not shown) to the one air intake port 26e and blows it out from each of the plurality of air outlets 25a. Therefore, only one air intake port 26e whose diameter is slightly larger than the diameter of the air jet port 25a is blocked.
Then, the duct 2 with the seal tape 4 is set on the lower mold 7a with the foam mold 7 in the mold open state of FIG. Each nozzle portion 25 is directed downward, the tip surface of the nozzle portion 25 is brought into contact with the upper end surface 72a of the raised portion 72, the mouth of the air outlet 25a is closed, and the duct 2 with the seal tape 4 is attached to the lower mold 7a. Set (Figure 2). After the duct 2 is set on the lower mold 7a, the air intake port 26e may be closed with the seal tape 4, but there is a possibility that the set is shifted, and it is more preferable to use the duct 2 with the seal tape 4 in advance. In such a set of the duct 2 to the foaming mold 7, the duct main portion 21 is disposed horizontally, and the tubular portion 26 projects upward from the duct main portion 21.
At the same time as the setting of the duct 2 with the seal tape 4 to the lower mold 7a, the backing material 3 is attached and set to the mold surface 76 of the upper mold 7b with a stopper (not shown).

  Here, the sealing tape 4 is a sealing tape that closes the air inlet 26e and is stuck to the flange 27. A general-purpose tape having a size capable of closing the air inlet 26e with an adhesive tape provided with an adhesive on one surface of the resin tape is used. However, the resin of the resin tape is more excellent in the urethane material and non-adhesive material resin of the seat pad 1 because the seal pad 40 is inserted and the seat pad 1 is foam-molded.

The duct 2 is provided with the flange 27, and the air inlet 26e is closed with the seal tape 4 to cover the flange 27 (FIG. 3). The seal tape 4 is adhered to the joint surface 27a of the flange 27 with the mating member to obtain a duct-equipped seat pad with a seal tape. The seal tape 4 has a substantially semicircular shape as shown in FIG. 4 that is slightly larger than the rear surface view of the flange 27, and covers the entire area of the joint surface 27 a with the mating member of the flange 27 with the seal tape 4. This is to prevent the foaming material m from adhering to the joint surface 27a of the flange with the mating member in the foaming process of the seat pad 1. The flange 27 is provided with a recess 272, and the seal tape 4 floats in the recess 272 and covers the entire area of the joint surface 27 a with the mating member of the flange 27. 3, 11 (c), and 13 (c), the seal tape 4 is slightly separated from the end 261 of the cylindrical portion and the main flange portion 271 to make the seal tape 4 easy to understand. It adheres to at least the flange main part 271 near the cylindrical part tip 261 and the return part 273.

Next, a predetermined amount of a foaming raw material m such as a sheet pad molding urethane foaming stock solution is injected into the mold surface 71 that forms the cavity 70 of the lower mold 7a with the mold open (see FIG. 6). ). Conventionally, the foaming raw material m is injected through the air intake port 26e with the mouth opened upward. However, the foaming raw material m scatters at the time of the injection, or the injected foaming raw material m rebounds. Or may enter the air intake port 26e. Here, since the seal tape 4 blocks the air intake port 26e and is adhered to the flange 27, the foaming material m does not enter the air intake port 26e. Since the sealing tape 4 is Kutsugaechaku the entire area of the joint surface 27a of the mating member of the flange 27, nor contaminate the the bonding surface 27a of foam material m.

  Subsequently, the upper mold 7b is operated to close the mold (FIG. 7). When the upper mold 7b and the lower mold 7a are closed, the mold mating surfaces 78 and 79 come into contact with each other, and the seat pad 1 cavity 70 in which the duct 2 with the seal tape 4 is inserted and set is formed. The upper mold surface 76 abuts the cylindrical portion tip 261 forming the air inlet 26e via the seal tape 4 to stabilize the set of the duct 2 with the seal tape 4 on which the nozzle portion 25 is placed on the raised portion 72. Let

After closing the mold, the process proceeds to foam molding of the seat pad 1. The mold closed state of FIG. 7 is maintained for a predetermined time, and the seat pad 1 in which the duct 2 with the seal tape 4 is embedded and integrated is formed by foaming (FIG. 8).
The cylindrical portion 26 on the opposite surface 27b side of the joint surface of the flange 27 together with the duct main portion 21 is filled with the seat pad 1, and the seat pad 1 in which the duct 2 with the sealing tape is embedded and integrated is formed by foaming. . The air inlet 26e is closed with the seal tape 4, and foaming is performed in a state where the joint surface 27a of the flange 27 with the mating member is covered. The mouth of the air outlet 25a is closed by the upper end surface 72a of the raised portion 72, and the air inlet 26e is closed and sealed with the sealing tape 4, so that the foam raw material m is introduced into the duct 2 in the foam molding process. There is no invasion.

After foam molding of the seat pad 1, the mold is removed to obtain a duct-equipped seat pad with a reference tape with a seal tape exposed on the back surface 1b side of the seat pad (FIGS. 9 to 11).
The duct main portion 21 is disposed inside the seat pad, the air outlet 25a is communicated with the air outlet 10, and the air intake port 26e disposed on the back surface 1b of the seat pad is closed with a sealing tape and attached to the flange 27. A ducted seat pad with a sealing tape is completed. The seat pad 1 is provided with side portions 13 on both sides of the main portion 12 constituting the main portion 11, and suspension grooves 14 are provided on both boundaries on the seat pad surface 1 a side. Reference numeral 14a indicates a vertical groove, and reference numeral 14b indicates a horizontal groove. On the back surface 1b side of the seat pad, the air inlet 26e and the flange 27 of the duct 2 covered with the seal tape 4 allow the face to be seen through the seal tape 4 as shown in FIG.
The seat pad with the reference form with the seal tape is provided with the seal tape which prevents the dust and dirt from entering the duct 2 from the large air intake port 26e.

Thereafter, the seal tape 4 that has blocked the air intake port 26e is peeled off. The seal tape 4 adhered to the flange 27 and exposed on the seat pad back surface 1b side is peeled off, and the air intake port 26e is opened (FIG. 12).
Here, when the sealing tape 4 is peeled off from the flange 27, the sealing tape 4 is made slightly larger than the flange 27, so that the peripheral edge 43 of the sealing tape 4 enters the seat pad 1 by foam molding of the seat pad 1. There are cases (b, c in FIG. 11). Even if the tab portion 42 for picking up the knob shown in FIG. 13 is provided on the seal tape 4, the ear portion 42 enters the seat pad 1, and it is difficult to peel off the seal tape 4. The back surface 1b of the seat pad is usually provided with a backing material 3 made of non-woven fabric or the like (FIG. 11), and the backing material 3 cut out only by the portion 30 of the flange 27 is inserted and integrated with the seat pad 1. The When the ear part 42 enters under the backing material 3, it is difficult to peel off the seal tape 4. In such a case, the seal tape 4 at the site of the recess 272 can be manually pressed toward the bottom of the recess 272 to peel off the seal tape 4.

As shown in FIGS. 13 (a) and 13 (b), it is more preferable to provide a pinhole 45 in advance at a portion that closes the air intake port 26e or (and) to employ the seal tape 4 in which the perforation 46 is provided in an arc shape.
In FIG. 13A, the finger F is pressed with the central portion of the seal tape 4 that closes the air intake port 26e facing the air intake port 26e. By this pressing, the perforation 46 is connected and cut. Then, the finger F entering the air intake port 26e is used to grip the tape portion 47, and the seal tape 4 attached to the flange 27 can be easily peeled off. FIG. 13C shows a state in which the finger F is pushed in as indicated by an arrow, and then the fingertip is bent to lift the seal tape 4. Further, in place of the perforation 46, the seal tape 4 can be easily peeled off by using a pinhole 45 shown in FIG. Although the pinhole 45 is illustrated in a large size for easy understanding, the foaming material does not enter the air intake port 26e from the pinhole 45 or the perforation 46 during foam molding.

FIG. 14 (a) shows a duct countermeasure product of the present invention that can smoothly peel off the seal tape 4. FIG. Unlike the duct 2 of FIGS. 1 to 12, the shape of the flange 27 is changed. The recess 272 is opened at the outer peripheral edge 271a of the flange 27, and the opening 272k is narrowed from the recess 272 on the side of the air intake port 26e into a constricted portion, so that the recess 272 is formed into a cove shape. Here, the recess 272 is provided with a groove-like opening portion 272k that reaches a flange outer peripheral edge 271a from a part of the surface of the joint surface 27a with the mating member of the flange. Then, as shown in FIG. 14 (b), the seal tape 4 is adhered to the flange 27 so as to cover the open portion 272k. After inserting a finger into the opening 272k as shown by the arrow in the figure, if the finger is lifted from below the seal tape 4, the seal tape can be removed without difficulty.

FIG. 15 (a) shows another embodiment of the duct 2 in which the shape of the flange 27 is changed so that the seal tape 4 can be peeled off smoothly. From the outer peripheral edge 271a of the flange 27 to the air inlet port 26e side, recess 274 enters the cove shape is formed, and the recess 274 is covered with the sealing tape 4. Even if the substantially semicircular sealing tape 4 shown in FIG. 15 (b) covers the entire area of the joint surface 27a of the flange 27 with the mating member, and the seat pad 1 is foam-molded, as shown by the arrows in FIG. After inserting the finger F under the seal tape 4 arranged on the recess 274, the fingertip is bent and the seal tape 4 is lifted to facilitate peeling.

The timing at which the sealing tape 4 is peeled off is not performed immediately after the foam pad molding seat pad 1 with the sealing tape 4 is integrally foam-molded. Since intrusion of dust, dust and the like can be prevented for a long time after foam molding, it is more preferable.
When the seal tape 4 is peeled off and a skin pad (not shown) is put on the seat pad 1 with the duct 2 in which the air intake port 26e is opened on the seat pad back surface 1b side, a seat cushion for a desired seat for a vehicle seat is completed.

According to the method for manufacturing a seat pad with a duct configured in this way, the seat pad 1 is foam-molded by inserting the duct 2 with the seal tape 4 in which the seal tape 4 blocks the air intake port 26e. The foaming material m cannot enter the duct 2 from the air inlet 26e not only in the process but also in the foaming material m injection step. Since the air intake port 26e is blocked by the seal tape 4, even if the injection hose h is misplaced over the head of the air intake port 26e and the foaming material m is poured from the hose h in FIG. It does not enter the mouth 26e. Whereas the invention of Patent Document 1 was unprotected in the process of injecting the foaming raw material m, the present invention prevents the intrusion of the foaming raw material m into the duct 2 in the injection process and the foaming molding process of the foaming raw material m. It has become.
Even if the foaming raw material m that has entered the pipe is removed by post-processing, it is after the formation of the commercialized seat pad 1 and has difficulty in post-processing work while ensuring product quality. If it cannot be removed, the hardened portion of the foaming raw material m remains in the duct 2 and the ventilation resistance is increased, so that it does not conform to the seat pad 1 with the duct 2 in pursuit of comfort and becomes a defective product. Is effective in improving productivity and quality.

Further, since the air intake port 26e is closed with the seal tape 4, and the seal tape covers the joint surface 27a with the mating member of the flange 27, the joint surface that becomes the joint portion with the mating member is used as the foaming raw material. Do not get dirty with m. If the foaming raw material m is applied to the flange joint surface, it becomes difficult to join the mating member. Therefore, the hardened portion of the foaming raw material m has to be removed.

  Further, when the duct 2 with the sealing tape 4 is inserted and a seat pad with a sealing tape on which the seat pad 1 is integrally foamed is formed, dust can be collected from the large air intake 26e for storage or the like. Such impurities will not enter the duct 2. Contribute to quality maintenance.

  Further, when assembling to the vehicle, the seat pad 1 with the duct 2 from which the seal tape 4 has been peeled off is provided, but when the recess 272 is formed in the flange, the seal tape 4 is Since it is stuck to the flange 27 in a floating state, the joint portion between the seal tape 4 and the flange 27 is reduced. Therefore, the seal tape 4 can be easily peeled off.

However, if the peripheral edge of the seal tape 4 enters the seat pad 1 during foam molding or under the backing material 3 attached to the back surface 1b of the seat pad, the seal tape 4 is peeled off. Becomes difficult. Even in such a case, if the pinhole 45 or the perforation 46 is provided in the part of the seal tape 4 that closes the air intake port 26e, the seal that closes the air intake port 26e is used as described above. The tape 4 can be easily peeled off.
Further, when the flange 27 Ru provided an opening 272k with recesses 272, after product completion, as indicated by the arrow in FIG. 14 (b), the peeled off the sealing tape 4 very easily if Tsukkome finger into the opening 272k Can do.
Further, when the recess 27 is formed in the flange 27 and the entire area of the joint surface 27a of the flange 27 with the mating member is covered with the seal tape 4, even if the seat pad 1 with the duct 2 with the seal tape 4 is foam-molded, FIG. If the finger F is inserted under the seal tape 4 covering the recess 274 as indicated by the arrow 15 (b) and then the fingertip is bent and the seal tape 4 is lifted, the seal tape 4 can be easily peeled off.

Here, when the sealing tape 4 adhered to the flange 27 is peeled off, it can be peeled off by using a hooking tool such as a bottle opener. However, if you change the hook tool in your hand and work, the time will increase and the number of work steps will increase.
If the pinhole 45 or the perforation 46 and the recess 272 with the opening 272k and the recess 274 are formed, the seal tape 4 can be peeled off from the duct 2 with the seal tape 4 very easily. Since the seal tape 4 can be peeled off immediately at the vehicle assembly site, the sheet pad with the seal tape cured with the seal tape 4 is kept to the vehicle assembly site to prevent dust and dirt from entering the duct 2. Supply is also possible. Contributes to further quality improvement. Of course, even if the seat pad with duct with seal tape is produced and stored in stock, the seal tape 4 is cured by closing the air inlet 26e, so that dust and dust do not enter the duct 2 and the quality is maintained. To contribute.

  The present invention is not limited to those shown in the above-described embodiment, and various modifications can be made within the scope of the present invention depending on the purpose and application. The shape, size, number, material, and the like of the seat pad 1, the duct 2, the seal tape 4, the foaming mold 7, etc. can be appropriately selected according to the application. For example, although the embodiment is applied to the seat pad 1, it can also be applied to a back pad.

DESCRIPTION OF SYMBOLS 1 Seat pad 2 Duct 26 Cylindrical part 26e Air inlet 27 Flange 27a Joining surface ( outer surface ) with partner member
27b Opposite side of the joint surface ( back )
271a the outer peripheral edge 272 recess 272k opening 274 dent (one part)
4 Sealing tape 45 Pinhole 46 Sewing surface 7a Lower mold m Foaming raw material

Claims (3)

A method for manufacturing a seat pad with a duct embedded with a duct for air distribution (2),
Set the air distribution duct (2) with the air inlet (26e) and air outlet (25a) on the lower mold (7a) of the foaming mold (7), and the air inlet that faces upward in the set (26e) is sealed with the sealing tape (4), then the foaming raw material (m) is injected and the mold is closed, and then the seat pad (1) with the sealing tape (4) with the inserted duct (2) is integrated. Finishing foam molding, demolding, then peeling off the sealing tape (4), in the method of manufacturing a ducted seat pad that opens the air inlet (26e) ,
A flange (27) connected to the mating member is provided in the cylindrical part (26) forming the air intake port (26e) , and the flange (27) is opposite to the mating surface (27a) side from the mating member. (27b) forming a recess (272) that is recessed toward the side, the recess (272) is opened at the outer peripheral edge (271a) of the flange (27), and the opening (272k) is the air inlet (26e) from the recess (272) on the side narrowly formed into a constricted part shape,
The air inlet said (26e) sealing tape (4) in infarction Gutotomoni, the seal tape is the recess (272) said opening at floating state (272K) so as to cover up the flange (27) A method for producing a ducted seat pad comprising covering a joint surface (27a) with a mating member and sticking the seal tape (4) to the joint surface . A method for manufacturing a seat pad with a duct embedded with a duct for air distribution (2),
Set the air distribution duct (2) with the air inlet (26e) and air outlet (25a) on the lower mold (7a) of the foaming mold (7), and the air inlet that faces upward in the set (26e) is sealed with the sealing tape (4), then the foaming raw material (m) is injected and the mold is closed, and then the seat pad (1) with the sealing tape (4) with the inserted duct (2) is integrated. Finishing foam molding, demolding, then peeling off the sealing tape (4), in the method of manufacturing a ducted seat pad that opens the air inlet (26e) ,
A flange (27) connected to the mating member is provided in the cylindrical part (26) forming the air intake port (26e), and the flange (27) is connected to the air intake port (26e) side from the outer peripheral edge (271a). Form a recess (274) that goes into
The air inlet (26e) the sealing tape (4) in infarction Gutotomoni, the sealing tape (4) so as to cover up dents (274) wherein the junction surface of the mating member of the flange (27) (27a ), And the sealing tape (4) is adhered to the joint surface (27a) . A pinhole (45) or a perforation (46) is provided at a portion of the seal tape (4) that closes the air intake port (26e), and the air intake port (26e) is closed with the seal tape (4). Item 3. A method for producing a ducted seat pad according to Item 1 or 2.

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