JPH0564819A - Mold of composite cushioning body for seat or the like - Google Patents

Abstract

PURPOSE:To obtain a favorable composite cushioning body consisting of portions differing in characteristics such as hardness by a method wherein each molding stock liquid is fed to the each predetermined part divided with partition plates in the molding recesses of a lower mold. CONSTITUTION:A mold 1 for obtaining a composite cushioning body, which has cushioning body portions differing in characteristics such as hardness by expansion molding a plurality of polyurethane resin foam developing stock liquids and forming in the predetermined shapes, consists of a lower mold 2, in the molding recess 3 of which partition plates 4 for dividing the stock liquids are provided, and an upper mold 8, between the molding surface 10 of which and each of the partition plates 4 of the lower mold 22 the predetermined gas is held at its mold clamping to the lower mold 2 and which forms the predetermined molding space part together with the molding recesses 3 of the lower mold 2. At the predetermined positions of the molding recesses 3 of the lower mold 2 and/or the molding surface 10 of the upper mold 8, adjusting plates 6 and 11, which control the flows of the stock liquids fed to respective molding recesses 3A and 3B divided with the partition plates 4, are provided. Thus, the favorable composite cushioning body consisting of portions differing in characteristics such as hardness and the like can be obtained.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an improvement of a molding die used for a seat or the like to obtain a composite cushion body having different characteristics such as hardness.

[0002]

2. Description of the Related Art The cushion body of a recent seat is made of polyurethane resin foam, and as shown in FIG.
It is a so-called composite cushion body 33 in which the hardness of the peripheral portion 32 is higher than that of the central portion 31. It should be noted that 34 and 35 in FIG. 8 are design grooves for forming a design line on the outer skin covered with the composite cushion body 33. The composite cushion body 33 is usually molded by the molding die 41 including the lower die 42 and the upper die 46 shown in FIG. (Note that the molding die 41 is not shown with ridges or the like forming the design grooves 34 and 35.)

That is, in FIG. 9, the molding recess of the lower mold 42 is partitioned by a partition plate 43 having an appropriate height.
A stock solution for foaming (hereinafter, simply referred to as stock solution) GA for forming a cushion body portion having high hardness in one of the partition recesses 44.
Is supplied, and the other partition recess 45 is supplied with the undiluted solution GB for forming a cushion body portion having a low hardness. The supplied both stock solutions GA and GB are not mixed by the partition plate 43.

After the supply of both stock solutions, the upper mold 46 is clamped and foam molding is performed to separate the stock solutions GA and GB into partition plates 4 respectively.
Both sides of 3 are foam-molded into a predetermined shape, and both foams are joined in a gap portion above the partition plate 43. Thus, the seat cushion composite cushion body 33 (the composite cushion body 33 of FIG. 8, and FIG. 8) having a high-hardness cushion body portion and a low-hardness cushion body portion, which are joined together and formed into a predetermined shape. (See the shape in the mold of FIG. 9).

[0005]

However, the lower mold 4
Since the undiluted solutions GA and GB supplied to the respective partition recesses of No. 2 do not flow well, conventionally, in the lower mold 42 of the phantom line shown in FIG.
The stock solution GA for hard is supplied to the points 2 and P3, and the stock solution GB for soft is supplied to the central portion 31 at the points P4, P5 and P6. As described above, conventionally, since each stock solution is supplied to many points, it takes a lot of time and time to supply the stock solution, which causes a problem of poor productivity.

Therefore, an object of the present invention is to solve the above-mentioned problems in a mold for obtaining a composite cushion body, in which each predetermined partition recess of each partition is divided by a partition plate of the molding recess of the lower mold. By providing the undiluted solution in one place or in less places than before, it is possible to satisfactorily make the undiluted solution flow in each of the partition recesses, and to provide a molding die for obtaining a good composite cushion body having different characteristics such as hardness. Especially.

Another object of the present invention is to provide a mold suitable for obtaining a composite cushion body for a seat.

[0008]

According to a first aspect of the invention for solving the above-mentioned problems, a cushion body portion is formed by foam-molding a plurality of undiluted solutions to be a polyurethane resin foam, each having different characteristics such as hardness. A molding die for obtaining a composite cushion body having a predetermined shape, the lower die having a partition plate for separating the stock solution in a molding recess, and a lower die for clamping the lower die. The upper mold has a molding surface having a predetermined gap with respect to a partition plate of the mold and forms a predetermined molding space with the molding recess of the lower mold, and the molding recess of the lower mold and / or the molding of the upper mold. It is characterized in that an adjusting plate for adjusting the flow of the stock solution supplied to each molding concave portion partitioned by the partition plate is provided at a predetermined position on the surface.

A second aspect of the present invention for solving the above problems.
In the molding die according to claim 1, the partition plate is arranged in a U shape that divides the molding recess of the lower mold into a central portion and an outer peripheral portion thereof, and the adjusting plate of the lower mold is provided in the central portion of the molding concave portion. It is characterized in that it is protruded in a V shape, and that the adjustment plate of the upper mold is projected on the molding surface of the upper mold so as to be arranged at a position corresponding to or near the partition plate of the lower mold.

[0010]

[Function] The stock solution is supplied to the predetermined positions of the respective partition recesses formed by partitioning the molding recesses with partition plates. The supplied undiluted solution flows while spreading all over each partition recess, and part of it reaches the adjusting plate and stays there temporarily. In this state, the upper molds are stacked. A molding space for obtaining a composite cushion body is formed in both molds that have been clamped. The undiluted solution becomes a foaming solution with increased volume due to the urethane reaction and flows through each partition recess. The flow of the foaming liquid in each of the partition recesses is adjusted by the adjusting plate, so that the space fills and comes into contact with each other at substantially the same time. The demolded composite cushion body has a predetermined shape in which the respective cushion body parts are joined.

In a molding die in which a partition plate is arranged in a U-shape in the molding recess of the lower mold, the undiluted solution is supplied to predetermined positions in the central part and the outer peripheral part of the lower mold. The flow of the stock solution (and the foaming solution) in the central portion is adjusted by the V-shaped adjusting plate, and is made almost the same as the flow of the stock solution in the outer peripheral portion. The clamped upper mold adjusting plate has a function of preventing the foaming liquid in the outer peripheral portion from directly flowing into the central portion.

[0012]

Embodiments of the present invention will now be described with reference to FIGS. Fig. 1 shows a composite cushion body K for a seat
The shaping | molding die 1 for obtaining 1 (refer FIGS. 4-6) is shown. This mold 1 comprises a lower mold 2 having a predetermined molding recess 3 and an upper mold 8 which is superposed on the lower mold 2 and clamped.

As shown in FIGS. 1 and 2, the molding recess 3 of the lower mold 2 has a predetermined depth, and the bottom surface has a predetermined curved surface. On the bottom surface of the molding recessed portion 3, ridges 5 for forming the design groove 21 in the vertical direction on the composite cushion body K1 are provided at predetermined intervals in the vertical direction. Ridge 5
A higher plate-shaped partition plate 4 is mounted in a U-shape so as to traverse the rear side of each ridge 5 and cover each ridge 5.
The partition plate 4 of this example has a thick plate at a portion that crosses both the convex stripes 5 and is a protruding plate 4A that forms the laterally designed groove 22 of the composite cushion body K1. The upper end surface of the partition plate 4 has a flat shape, and a certain gap is formed with the molding surface 10 of the upper mold 8 when the mold is clamped.

The molding recess 3 of the lower mold 2 is a U-shaped partition plate 4.
Thus, the outer partition recess 3A and the center partition recess 3B
It is divided into The partition recess 3A has a deep curved bottom surface on the outer peripheral side, and the partition recess 3B has a shallow curved bottom surface on the protruding plate 4A side and a deep curved bottom surface. An adjusting plate 6 having a square shape with a narrower upper side is provided on the opposing surface of the upper part of each ridge 5 of the partitioning concave part 3B in the central part. Both adjusting plates 6 have a predetermined size higher than the ridges 5 and lower than the partition plate 4. Both of the adjusting plates 6 are for temporarily stopping the flow of the stock solution GB (or including the case of foaming liquid) supplied to the central partitioning recess 3B so that the stock solution GB spreads to the entire central partitioning recess 3B. belongs to.

The upper mold 8 is formed in a shape matching the lower mold 2, and the molding surface 10 is flat. The outer periphery of the molding surface 10 has a protruding edge portion 25 on the outer periphery of the back surface of the composite cushion body K1.
(See FIGS. 5 and 6) A stepped portion 10A is provided. It should be noted that the molding surface 10 is appropriately provided with a small-diameter gas vent hole (not shown). The upper die 8 is connected to the lower die 2 via a hinge portion 9 so as to be openable and closable,
When the upper die 8 is clamped to the upper die 8, the molding recess 3 of the lower die 2 and the upper die 8 are
A predetermined molding space for obtaining the composite cushion body K1 is formed by the molding surface 10 of FIG.

At a predetermined position on the molding surface 10 of the upper mold 8 near the hinge portion 9, as shown in FIGS. 1 to 3, the central portion of the partition plate 4 is inserted into the outer partition recess 3A of the lower mold 2. That is, the plate-shaped adjusting plate 11 arranged near the protruding plate 4A
Is projected. When the adjustment plate 11 is clamped, the lower mold 2
The height is such that a predetermined gap is created with respect to the bottom surface of the partition recess 3A. The adjusting plate 11 temporarily stops the stock solution GA supplied to the partition recess 3A from flowing over the projecting plate 4A and flowing into the partition recess 3B at the same time as the foaming, so that the foam solution of the stock solution GA is spread over the entire outer partition recess 3A. It is meant to spread the word. The mounting positions and sizes of the adjusting plates 6 and 11 are preferably determined by molding in a preliminary test.

As shown in FIG. 3, the undiluted solution GA is supplied to a predetermined position of the partition concave portion 3A on the outer peripheral portion of the lower mold 2, Q1 portion (corresponding to P1 in FIG. 8) in FIG. The undiluted solution GB is supplied to a predetermined position of the partition concave portion 3B, that is, a portion Q4 in FIG. 3 (a portion corresponding to P4 in FIG. 8).

The stock solutions GA and GB are composite cushion bodies K1.
Use a formulation that is suitable for the intended use. Stock solution G of this example
For A and GB, for example, the formulations shown in Table 1 were used.

[0019]

[Table 1]

In the formulation of Table 1, the undiluted solution GA is a cushion body portion KA that is harder than the undiluted solution GB. In FIG. 3, since the undiluted solution GA supplied to the portion Q1 is partitioned by the partition plate 4, the partition recess 3A
Flowing toward the arrow Q2 portion and the arrow Q3 portion while spreading.
On the other hand, the undiluted solution GB supplied to the Q4 portion spreads and flows to the arrow Q5 portion, and a part of the raw material GB reaches the U-shaped adjusting plate 6 and slightly remains on the adjusting plate 6. In this state, the upper mold 8 is closed.

In the closed mold of the upper mold 8, the undiluted solution G
A and GB foam by the urethane reaction to increase the volume and become a foaming liquid which flows in the respective partition recesses 3A and 3B. The undiluted solution GA increases the volume in the Q1 portion, but the adjustment plate 11 of the upper mold 8 is arranged, so that the stock solution GA does not directly enter the Q4 direction beyond the protruding plate 4A. Flows steadily in the Q2 and Q3 directions. If the adjusting plate 11 of the upper mold 8 is not provided, the volume-increased foaming liquid enters the Q4 direction beyond the partition plate 4, but the adjusting plate 1
1 prevents this and Q2 of undiluted GA or foaming liquid
Direction, promote flow in Q3 direction. On the other hand, the speed of the undiluted solution GB flowing in the Q5 direction is slowed down by the V-shaped adjusting plate 6, which matches the speed of undiluted solution GB flowing to the Q2 portion and the Q3 portion. When the volume of the undiluted solution GB remaining on the adjusting plate 6 is increased, the undiluted solution GB flows over the ridges 5 and flows in the directions Q6 and Q7. If the adjusting plate 6 is not provided, the undiluted solution GB (or its foaming liquid) does not easily flow to the Q2 portion and the Q3 portion, but the undiluted solution GB satisfactorily flows in the Q2 and Q3 directions by the adjusting plate 6.

In this example, since the speed of the undiluted solution GB flowing to the Q5 portion is slowed down, the time for the undiluted solution GB to flow over the entire partition recess 3B and the undiluted solution GA to reach the Q8 portion and the Q9 portion at the tip of the partition recess 3A. The time is adapted to match. As a result, the undiluted solution G is left in the molding space of the mold 1.
It is filled with the reacted foaming liquid of A and GB. The stock solutions GA and GB of this example were supplied at 25 ° C and the molding temperature was 35 ° C.
And The gas generated in foam molding is the upper mold 8
It can be appropriately escaped from the gas vent hole of the molding surface 9.

In the foam molding, the stock solutions GA and GB are foamed and filled in the respective partition spaces to fill the respective cushion body portions K.
A and KB. Then, the upper mold 8 is opened, and the lower mold 2 is demolded to obtain a predetermined composite cushion body K1 shown in FIGS. In addition, in FIG. 4, FIG. 5, and FIG.
Is a vertical design groove in the cushion body K1, 22 is a lateral design groove, 24 and 26 are marks of the adjusting plate, and 25 is a protruding edge portion.

The composite cushion body K1 has a seat cushion shape in which a hard cushion body portion KA and a soft cushion body portion KB are joined at the position of the partition plate 4. Both cushion body parts KA and KB had a strong bondability in a state in which the respective tissues appropriately invaded. The upper surface (see FIG. 4) of the obtained composite cushion body K1 is covered with a skin (not shown) laminated with a pad layer, and the design grooves 21 and 22 are subjected to a skin drawing process to a predetermined size. Seat cushion (not shown).

Adjusting plate 11 of upper die 8 in the molding die 1
Is provided near the hinge portion 9 of the molding surface 10 and is positioned in the molding recess 3A on the outer side in the vicinity of the projecting plate 4A of the lower mold 2 as shown by the phantom line in FIG. The adjusting plate can be provided above the protruding plate 4A of the lower mold 2 at a height having a predetermined gap with respect to the protruding plate 4A. Further, as shown in FIG. 7, the adjusting plate 11A of the upper mold 8 may be provided so as to protrude into the partition recess 3B in the vicinity of the protruding plate 4A of the lower mold 2.

[0026]

According to the invention of claim 1, the adjustment for adjusting the flow of the stock solution supplied to the molding recesses of the lower mold and / or the molding recesses partitioned by the partition plate at predetermined positions on the molding surface of the upper mold. Since the plate is provided, the flow of each undiluted solution supplied can be adjusted so that the foaming liquid due to urethane foaming can fill the partition recesses almost at the same time, and each cushion with different characteristics such as hardness. It is possible to obtain a good composite cushion body in which the body parts are joined and which has a predetermined overall shape. That is, in the molding die of claim 1, since the adjusting plate is provided, even if the number of points for supplying the undiluted solution is reduced, it is possible to fill the foaming liquid in the whole of the respective partition recesses almost at the same time, and the characteristics such as hardness are different. A composite cushion body can be obtained. Therefore, according to the molding die of the present invention of claim 1, the labor of supplying the undiluted solution can be reduced and the working efficiency can be improved. In the invention of claim 2, the partition plate is U
Since the lower mold dents are arranged in a letter shape and divided into partition recesses in the central part and the outer peripheral part, if the undiluted solution is supplied to each predetermined location in the central part and the outer peripheral part, the undiluted solution in the central part Is adjusted by the V-shaped adjusting plate, and the flow of the stock solution in the outer peripheral portion is adjusted by the upper adjusting plate, and a good composite cushion body for a seat is obtained. Also in the second aspect of the present invention, the labor for supplying the undiluted solution can be reduced and the working effect of improving the working efficiency can be obtained.

[Brief description of drawings]

FIG. 1 is a perspective view of a molding die.

FIG. 2 is a sectional view taken along line II-II in FIG.

FIG. 3 is a plan view of a molding die.

FIG. 4 is a perspective view of the molded composite cushion body.

FIG. 5 is a rear view of the composite cushion body.

6 is a cross-sectional view taken along line VI-VI in FIG.

FIG. 7 is a layout view of another example of the adjustment plate in the upper mold.

FIG. 8 is a plan view mainly showing a conventional composite cushion body.

FIG. 9 is a cross-sectional view of a conventional molding die.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Mold 2 Lower mold 3 Mold recess 3A, 3B Partition recess 4 Partition plate 6, 11, 11A Adjusting plate 8 Upper mold 10 Mold surface K1 Composite cushion body KA, KB Cushion body part

─────────────────────────────────────────────────── ─── Continuation of the front page (51) Int.Cl. ⁵ Identification code Office reference number FI technical display location B29L 31:58

Claims (2)

[Claims] 1. A composite cushion body molded into a predetermined shape having a cushion body portion having different characteristics such as hardness by foam-molding a plurality of stock solutions for foaming to form a polyurethane resin foam. A molding die, in which a partition plate for separating the undiluted solution for foaming is provided in a molding recess, and when the lower mold is clamped, a molding surface has a predetermined gap with respect to the partition plate of the lower mold. An upper mold that has a molding recess of the lower mold and forms a predetermined molding space, and the molding recess of the lower mold and / or a predetermined position of the molding surface of the upper mold is partitioned by a partition plate. A mold for a composite cushion body, comprising an adjusting plate for adjusting the flow of the undiluted solution for foaming supplied to the molding recess. 2. A partition plate is arranged in a U shape that divides a lower mold forming recess into a central portion and an outer peripheral portion thereof, and an adjusting plate of the lower mold is projected in a V shape at the central portion of the forming recess, and The molding of the composite cushion body according to claim 1, wherein the adjusting plate of the upper mold is projected from the molding surface of the upper mold so as to be arranged at a position corresponding to or near the partition plate of the lower mold. Type.