JP3589792B2 - Manufacturing method of cushion body of different hardness - Google Patents

Description

[0001]
TECHNICAL FIELD OF THE INVENTION
The present invention For manufacturing method of different hardness cushion body with partially different hardness Related.
[0002]
[Prior art]
For example, an automobile seat 80 as shown in FIG. 18 has a cushion body made of polyurethane foam or the like covered with a skin and used for a seat portion 81 and a backrest 82. Further, as the cushion body used for this seat, a different hardness cushion body having partially different hardness is preferable from the viewpoint of the occupant's holdability, ease of getting on and off, and the like. FIG. 19 shows the cushion body 83 of different hardness, which is used for the seat 81. In this different hardness cushion body 83, a high hardness foam 84a is embedded in both sides 84, and the surface and the center 85 of the both sides 84 are made of a low hardness foam softer than the high hardness foam 84a. It is configured.
[0003]
As a simple manufacturing method of the different hardness cushion body, a plurality of foaming materials to be foamed with different hardness are separately injected into a cavity of a molding die, and foams having different hardness formed from both foaming materials are injected. A method of foaming the body integrally, or a foam pad made of a high-hardness foam is placed in a predetermined position in a molding die in advance, and a foaming material for low hardness is injected into the molding die, and the foam is formed by foaming. There is a method of integrating a low hardness foam with the high hardness foam pad.
[0004]
FIG. 20 shows an example of the former manufacturing method. In this conventional example, a liquid storage container 88 made of expanded polypropylene or expanded polyethylene is held on both sides of a cavity 87 of a lower mold 86, and a high-hardness foaming material 89 is stored in the liquid storage container 88, and a low-density foaming material 89 is formed in the other part of the cavity 87. The foaming raw material 90 for hardness is injected, and the foaming raw materials are integrally foamed to produce a cushion cushion body of different hardness. Reference numeral 91 denotes an upper mold.
[0005]
FIG. 21 shows an example of the latter manufacturing method. In this conventional example, a high-hardness foam pad 93 is previously attached to both sides of the mold surface of an upper mold 92, while a foam raw material 96 which is a soft foam having a lower hardness than the foam pad 93 is injected into a cavity 95 of a lower mold 94. Then, the upper mold 92 and the lower mold 94 are closed to produce a different hardness cushion body in which the low hardness foam formed from the foam raw material 96 and the high hardness foam pad are integrated.
[0006]
[Problems to be solved by the invention]
However, according to the former manufacturing method, since the end of the liquid reservoir 88 is held between the parting surfaces (divided surfaces) 97 of the upper die 91 and the lower die 86, the parting surface 97 is sealed by the holding. Problem. That is, the parting surface 97 also plays a role of allowing a foaming gas generated during foaming of the foaming raw material 90, air trapped in the cavity, and the like to escape to the outside so that the foaming raw material 90 can be completely filled in the cavity. For this reason, when the sealing is performed as described above, the foaming gas and the like are trapped in the cavity, and it becomes easy to cause underfill in the different hardness cushion body. Further, the rigidity of the liquid storage container 88 may make the user feel uncomfortable when using the cushion member having different hardness. Arise There is also a risk.
[0007]
On the other hand, according to the latter method, since the foam pad 93 is impregnated with the foam raw material 96 to form a hard film, the resulting cushion pad having a different hardness is formed on the surface of the foam pad 93 (the boundary surface with the low-hard foam). There is a problem of giving a user a sense of discomfort due to the hard film.
[0008]
Although not shown, as another method of manufacturing the different hardness cushion body, the inside of the cavity is partitioned by a partition erected on the bottom surface of the cavity, and a different foaming material is injected into each section to foam the different hardness cushion body. There are ways.
However, according to the method, since the obtained different hardness cushion body has a deep concave groove formed by the partition on the surface, the seating feeling is inferior, and the skin covered with the different hardness cushion body has wrinkles. There's a problem.
[0009]
The present invention has been made in view of the above points, and provides a high quality different hardness cushion body easily. Can be manufactured An object of the present invention is to provide a method for manufacturing a cushion body of different hardness.
[0010]
[Means for Solving the Problems]
Claim 1 The invention of , Mold And a bag made of a plastic film having an open top, and has the following configuration.
That is, the claims 1 The invention of a different hardness cushion body in which a plurality of foaming materials which become foams having different hardnesses are separately injected into a cavity of a lower mold of a molding die, and foams having different hardnesses are integrally foam-molded. In the manufacturing method, a rod-shaped body projecting from the cavity wall surface of the lower mold into the cavity is moved upward. rotation A molding die attached to the cavity wall surface on the base side as much as possible, a plastic film bag having an opening at the top and a hole formed at the edge thereof, and a lower cavity formed by passing the rod-shaped body through the hole. After injecting different foaming raw materials inside and outside the bag of the cavity and foaming a different hardness cushion body in which foams of different hardness are integrated, the molding die is opened and the different hardness is opened. The cushion body is lifted from the lower mold together with the rod-shaped body, and the cushion pad having a different hardness is removed from the rod-shaped body.
[0011]
Claim 2 The invention of , Mold And a bag made of a plastic film having an open top.
That is, the claims 2 The invention of a different hardness cushion body in which a plurality of foaming materials which become foams having different hardnesses are separately injected into a cavity of a lower mold of a molding die, and foams having different hardnesses are integrally foam-molded. In the manufacturing method, a rod-shaped body protruding into the cavity from the cavity wall surface of the lower mold is opened at the upper side and a hole is formed at an edge thereof by using a molding die which is removably inserted into the wall surface of the cavity. A plastic film bag is suspended in the lower mold cavity through the rod-shaped body through the hole, and different foaming materials are injected into the cavity bag and outside the bag, and foams having different hardnesses are integrated. During the foaming or after the foaming, the rod-shaped body is pulled out of the wall of the lower mold and pulled out of the cavity of the lower mold. Characterized in that the take out.
[0012]
Meanwhile, claims 3 The invention of , Mold , A foam pad and a plastic film.
That is, the claims 3 In the invention, a foaming pad is placed at a predetermined position on the bottom surface of a lower mold cavity of a molding die, and a foaming material which becomes a foam having a hardness different from that of the foaming pad is injected into the cavity, and from the foaming material, In a method of manufacturing a cushion body of different hardness in which the formed foam and the foam pad are integrated, a rod-shaped body that is projected from a cavity wall surface of a lower mold to near both edges of the foam pad in the cavity is provided. Using a molding die attached to the cavity wall at the base side rotatably upward, after placing a foam pad on the bottom surface of the lower mold cavity, a plastic film having holes formed on both edges, The rod is passed through the hole and placed on the upper surface of the foam pad. Then, a foam material having a hardness different from that of the foam pad is injected into the lower mold cavity, and foam is formed from the foam material. After forming a different hardness cushion body in which the foamed body and the foam pad are integrated, the molding die is opened, the different hardness cushion body is lifted from the lower mold together with the rod-shaped body, and the different hardness cushion body is removed from the rod-shaped body. It is characterized by being extracted.
[0013]
Claims 4 The invention of , Mold , A foam pad and a plastic film.
That is, the claims 4 In the invention, a foaming pad is placed at a predetermined position on the bottom surface of a lower mold cavity of a molding die, and a foaming material which becomes a foam having a hardness different from that of the foaming pad is injected into the cavity, and from the foaming material, In a method of manufacturing a cushion body of different hardness in which the formed foam and the foam pad are integrated, a rod-shaped body that is projected from a cavity wall surface of a lower mold to near both edges of the foam pad in the cavity is provided. After a foaming pad is placed on the bottom surface of the lower mold cavity by using a mold that can be pulled out through the wall surface of the cavity, a plastic film having holes formed on both edges is rod-shaped in the hole. Through the body and placed on the top surface of the foam pad, then foaming material having a hardness different from the foaming pad is injected into the lower mold cavity, and a foam foamed from the foaming material is formed. Forming a cushion body having a different hardness with the foam pad, and pulling the rod-shaped body outward from the lower mold wall during or after foaming of the foaming material, and removing the rod from the cavity of the lower mold; The hardness cushion body is removed from the mold.
[0014]
BEST MODE FOR CARRYING OUT THE INVENTION
Hereinafter, the present invention will be described in detail with reference to the accompanying drawings.
FIG. 1 is a cross-sectional view of one embodiment of the molding die described in claim 1, FIG. 2 is a plan view of a lower die of the same embodiment, and FIG. 3 is a perspective view showing the vicinity of a lower bar of the same embodiment. FIG. 4 is a longitudinal sectional view of a molding die showing a state in which a bag is suspended in a cavity, and FIG. FIG. 6 is a plan view of the lower mold showing the state after foaming, FIG. 6 is a cross-sectional view of the mold showing foaming of the foaming raw material in the same example, and FIG. It is a longitudinal cross-sectional view.
[0015]
FIG. 8 is a perspective view showing another example of the plastic film bag during assembly, and FIG. 9 is a perspective view of the plastic film bag of the embodiment.
Furthermore, FIG. Mold 11 is a perspective view showing a main part of another example, FIG. 11 is a sectional view taken along line 11-11 of FIG. 10, and FIG.
[0016]
FIG. 13 is a perspective view showing the vicinity of attachment of a rod-shaped body in an example of the mold of claim 2, and FIG. 14 shows an example of a method of manufacturing a different hardness cushion body using the mold of FIG. 13 at the time of foaming. FIG. 15 is a vertical cross-sectional view of the molding die showing the time of extracting the rod-shaped body in the embodiment.
[0017]
Further, FIG. 3 And claims 4 FIG. 17 is a cross-sectional view of a molding die showing an example of a method of manufacturing the different-hardness cushion body of FIG.
[0018]
First , Claim 1 Different hardness cushion body described in Manufacturing method An example will be described.
The molding die 10 shown in FIGS. 1 to 3 comprises a lower die 11 and an upper die 21 which covers the lower die 11, and is used for foaming a different hardness cushion body having high hardness portions on both sides. In addition, the different hardness cushion body is for a seat portion of an automobile seat.
[0019]
A cavity 12 corresponding to a desired cushion body shape is formed in the lower mold 11. The cavity 12 forms a foaming space for the foaming material with the upper mold 21. The wall surface 13 on the rear side of the cavity 12 (the side corresponding to the rear side of the seat) is provided upright from the cavity bottom surface 14 at a position away from the rear outer wall 11a of the lower mold 11 by a predetermined amount. Further, the rear wall surface 13 of the cavity is a plate-shaped separation wall 13a in which both sides (edges) are separated from other portions, and is provided on the outer surface (opposite to the cavity) of the separation wall 13a. The hinge 15 is attached to the bottom surface 11b of the lower die 11 so as to be rotatable upward. In the meantime, in normal times (when returned to the inside of the cavity 12), the bottom portion 13b comes into contact with a part 13c of the rear wall surface 13 located below the bottom portion 13a, as shown in FIG. And is maintained substantially perpendicular to the cavity bottom surface 14 to form a series of rear wall surfaces 13.
[0020]
A pair of substantially parallel rods 16 projecting into the cavity 12 toward the front (the front side of the seat) is fixed to the separation walls 13a on both sides at the base side 16a. The rod 16 rotates upward together with the separation wall 13a. When the separation wall 13a is returned into the cavity 12, the rod 16 is held in a substantially horizontal state away from the cavity bottom surface 14. The material of the rod 16 is preferably a metal solid or hollow body, and the thickness is generally about 6 to 12 mm in diameter.
[0021]
It is not necessary that the rods 16 are provided in the same state on both separation walls 13a. For example, as shown in FIG. 6 which shows a cross section of the molding die 10 at the time of manufacturing the different hardness cushion body, the intervals and heights of the rods 16 are different between the left side and the right side of the lower die 11 or not shown. May have different lengths. It is appropriately determined according to the size of the plastic film bag 25 attached to the rod 16, that is, the size of the high hardness portion to be formed.
[0022]
Further, in this embodiment, the rod-shaped members 16 are formed as a pair and are provided on the left and right sides in the cavity 12 of the lower mold 11 respectively. Depending on (position), it may be one set or three or more sets. Depending on the structure of the plastic film bag 25 described later, the number of the rods 16 may be one set or one set of three or more.
[0023]
The upper mold 21 constitutes a lid of the lower mold 11, and is attached to the lower mold 11 at its rear side so as to be openable and closable with a hinge 23. In some cases, the upper mold 21 may not be connected to the lower mold 11 by a hinge and may be in a separated state.
[0024]
Next, the process is performed using the mold 10. 1 Examples of the method for manufacturing a cushion body of different hardness described in (1) will be described.
First, the mold 10 is opened, and a bag 25 made of a plastic film is attached to the rod 16 and hung in the lower mold cavity 12 as shown in FIGS. The operation of attaching the bag 25 is performed by rotating the rod-shaped body 16 upward and tilting the front side upward, and then rotating the film support rod 16 downward together with the bag 25 to return the bag 25 into the cavity 12. Is preferred. Further, it is preferable that the rod-like body 16 is coated in advance with a release agent for preventing adhesion of the foaming material to be injected into the cavity 12 later.
[0025]
The bag 25 is formed in a predetermined shape by welding or the like from a plastic film and has an upper opening. A cylindrical hole 26 is formed at both edges of the opening facing each other. Then, the rod 16 is passed through the hole 26, and the bag 25 is suspended in the lower mold cavity 12. The size and shape of the bag 25 are appropriately determined in accordance with the size and shape of the high hardness portion provided on the different hardness cushion body. In this embodiment, one of the two bags 25 arranged on both sides of the cavity 12 is smaller than the other.
[0026]
Further, the plastic film constituting the bag 25 is preferably flexible because the bag 25 is embedded in the cushion body of different hardness, and a thin film having a thickness of about 30 μm to 1 mm is suitable. Further, the plastic film has an adhesive property to a foam that is formed by foaming inside and outside the bag 25, and is preferably a urethane-based hot melt film that is heat-sealed.
[0027]
It is not necessary that the bag 25 be made of a single sheet or a plastic film of the same material, and all the portions have holes 36 at both ends, as in the case of a plastic film bag 35 shown in FIGS. The band-shaped plastic sheet 37 may be adhered or fused to the opposite edges 38a, 38a in the opening 38 of the bag 35.
[0028]
Next, as shown in FIG. 5, the foaming raw material P1 for high hardness is injected into the bag 25, and the foaming raw material P2 for low hardness is injected into the other part of the lower mold cavity 12, respectively. Cover 11. The foaming raw material P1 for high hardness has a foam formed by foaming, the hardness of which is higher than the hardness of a foam formed by foaming from the foaming raw material P2 for low hardness. It is preferred to use raw materials. Of course, different types of foaming raw material P1 for high hardness and foaming material P2 for low hardness may be used.
[0029]
The injection amount of the foaming raw material P1 for high hardness is an amount filling the inside of the bag 25 by foaming, while the injection amount of the foaming material P2 for low hardness is determined by foaming. And the amount to be charged.
[0030]
The foaming material P1 for high hardness foams and fills the bag 25 as shown in FIG. 6, while the foaming material P2 for low hardness fills the cavity 12 outside the bag 25 by foaming, and each of the foaming materials has high hardness. A body 31 and a low hardness foam 32 are obtained. Then, the two foams 31 and 32 are bonded and integrated with each other due to the adhesive property at the time of foaming, to form the different hardness cushion body 30.
[0031]
In this example, the injection into the bag 25 and the injection into the other part of the cavity 12 outside the bag 25 were performed substantially simultaneously. After that, the foaming raw material P2 for low hardness may be injected into the other part of the cavity 12 outside the bag 25.
[0032]
After the foaming of the cushion body 30 of different hardness, the molding die 10 is opened as shown in FIG. First, the different hardness cushion body 30 is rotated upward together with the rod-shaped body 16 and lifted from the lower mold 11, and in this state, the different hardness cushion body 30 is pulled forward of the molding die 10 and pulled out from the rod body 16. Performed by
[0033]
In the cushion body 30 with different hardness, both sides 30a of the seat portion are harder than the center portion 30b of the seat portion due to the presence of the high-hardness foam 31, so that the posture holding effect of the occupant is high, and the occupant is mainly used. The seating center portion 30b to be seated on the vehicle is made of the low-hardness foam 32, so that the seating feeling is good.
In addition, the different hardness cushion body 30 manufactured in this manner is covered with a skin and then used.
[0034]
Further, the rod-like body 16 is not limited to the structure of the above-described embodiment, but may be any as long as it rotates upward with the base side as a fulcrum. FIGS. 10 and 11 show a part of a lower die 45 including a rod-shaped body 41 of another example. As can be better understood from FIGS. 11 and 12, the rod 41 of this example is composed of a base 41a and a rod body 41b, and the base 41a is fixed to the cavity wall surface 47 of the lower mold 45, and the base 41a A rod body 41b is pivotally mounted on the front end of the rod so as to be rotatable upward and not to rotate downward from substantially horizontal.
[0035]
next , Claimed in claim 2 An example of a method for manufacturing a different hardness cushion body will be described.
FIG. Used in the invention of FIG. 3 is a perspective view showing an example of a molding die and showing a part of a lower die 51 of the molding die 50. FIGS. 14 and 15 are cross-sectional views illustrating the production of a cushion cushion body using the molding die 50.
The molding die 50 of this embodiment has a lower die 51 and an upper die 52, and has the same structure as the molding die 10 shown in FIG. 1 except that the rod-shaped body 56 does not rotate.
[0036]
The molding die 50 is provided with a pair of holes 54 penetrating inside and outside the mold at a predetermined distance from the cavity bottom surface 53b on each of wall surfaces 53a near both sides (edges) of the rear portion of the cavity 53 of the lower mold 51. A pair of substantially parallel rod-like bodies 56 corresponding to the pairs of holes 54 are respectively inserted so as to be able to be pulled out so as to be held in the cavity 53 substantially horizontally apart from the cavity bottom surface 53b.
[0037]
Use this mold 50 Claim 2 In the method of manufacturing a cushion cushion of different hardness, the bag 25 is suspended in the cavity 53 by inserting the rod-shaped body 56 into the hole 26 of the bag 25 shown in FIG. Then, as shown in FIG. 14, a foaming material 57 for high hardness is injected into the bag 25, and a foaming material 58 for low hardness is injected into the cavity 52 outside the bag 25 and foamed integrally. At this time, during or after the foaming of the foaming raw materials 57, 58, as shown in FIG. 15, the rod-shaped body 56 is pulled outwardly of the wall surface 53a of the lower mold 51 (outward of the molding mold), and is removed from the cavity 53. Remove and remove from bag 25.
[0038]
Thereafter, the molding die 50 is opened and the different hardness cushion body 60 is taken out. When the bar-shaped body 56 is to be extracted after the foaming raw materials 57 and 58 have been foamed, the bar-shaped body 56 may be pulled out of the wall surface 53a of the lower mold with the mold 50 opened. Reference numeral 59 denotes a high hardness foam, and 60 denotes a low hardness foam.
The number of the rods 56 is appropriately determined according to the number of bags to be used.
[0039]
The following claims 3 And claims 4 An example of a method for manufacturing a different hardness cushion body will be described. In order to simplify the explanation, the claims 3 And claims 4 Will be described with reference to FIG. In FIG. 16, those containing "A" after the numeral, such as "65A", 3 For the mold used in the present invention, those containing "B" after the numeral such as "65B" are described in the claims. 4 The present invention relates to a molding die used for:
[0040]
First, the claim 3 The molding die 65A used in this embodiment has a structure similar to that of the molding die 10 shown in FIG. 1 and the like, and includes a pair of rod-shaped bodies 72A fixed to the rear wall surface of the cavity 68A of the lower die 66A. It can rotate upward. Further, this rod-shaped body 72A is provided at a predetermined distance from the cavity bottom surface 69A near the boundary between the both sides 70A of the cavity bottom surface 69A and the central portion 71A so as to be near both upper edges of the foam pad 75 described later. I have. Reference numeral 67A is an upper mold.
[0041]
Meanwhile, claims 4 The molding die 65B used in the embodiment has a structure similar to that of the molding die 50 shown in FIGS. 13 to 15, and a pair of rods 72B is provided on the wall surface at the rear of the cavity 68B of the lower die 66B. It is inserted at a predetermined distance from the cavity bottom surface 69B near the boundary between the side portions 70B and the center portion 71B of the cavity bottom surface 69B so as to be inserted near the upper surface of the foam pad 75, which will be described later. . Reference numeral 67B is an upper mold.
[0042]
Claims: The molds 65A and 65B are used. 3 And claims 4 First, a foam pad 75 is placed on the center portions 71A, 71B of the bottom surfaces of the cavities of the lower molds 65A, 65B, and the plastic film supported on both sides by rods 72A, 72B on the upper surface of the foam pad 75. 76 is arranged.
[0043]
The foam pad 75 is for softening the feel of the central portion of the seating surface of the cushion body having a different hardness than other portions, and is made of a low-hardness foam having a predetermined thickness. Numeral 77 denotes a protrusion protruding from the bottom surface of the cavity for positioning the foam pad 75.
The plastic film 76 is made of a soft material capable of covering the upper surface of the foam pad 75, and is preferably a polyurethane-based hot melt film having a thickness of about 30 microns to 1 mm. The plastic film 76 has cylindrical holes 76a formed on both sides facing each other. The rods 72A and 72B are passed through the holes 76a, and are held so as to cover the upper surface of the foam pad 75.
[0044]
Thereafter, a foaming raw material that becomes a foam having a hardness different from that of the foam pad 75, in this embodiment, a foaming material P1 for high hardness is injected into the lower cavities 68A and 68B, closed, and formed by foaming. A foam body (shown by reference numeral 78a in FIG. 17) and the foam pad 75 are integrated to form a cushion body of different hardness in a molding die.
And claims 3 Then, the different hardness cushion body is lifted from the lower mold 66A together with the rod-shaped body 72A and pulled out from the rod-shaped body 72A. 4 During or after the foaming of the high-hardness foaming raw material P1, the rod-shaped body 72B is pulled out of the wall surface of the lower mold 66B (outward of the forming mold) and is removed from the lower mold 66B.
[0045]
This claim 3 And claims 4 According to the production method described above, when the foaming material P1 for high hardness is foamed, the foaming pad 75 in the cavity is in a state where the upper surface thereof is covered with the plastic film 76. The upper surface of the pad 75 (the boundary surface with the foam 78a formed from the foaming material) is not impregnated, and a cured film is not formed. Therefore, as shown in FIG. 17, the obtained different hardness cushion body 79 has no hard film at the interface between the low hardness foam pad 75 and the high hardness foam 78a formed from the high hardness foam material P1. The feeling during use is good.
[0046]
【The invention's effect】
As shown and described above, the different hardness cushion body of the present invention Manufacturing method According to this, a plastic film bag or plastic film is held in the cavity by the rod-shaped body provided in the cavity, and the end of the bag or plastic film is not pinched by the parting surface of the molding die. Outgassing through the parting surface is not hindered during the production of the body, and a good quality different hardness cushion body free from defects such as underfilling can be obtained.
[0047]
Moreover, the cushion body of different hardness according to the present invention. Manufacturing method According to this, since the bag or the plastic film can be securely and correctly held in the cavity by the rod-shaped body, it is possible to easily obtain a different-quality cushion body having a constant quality. In addition, since the plastic film used as a bag or without a bag is flexible, even if the plastic film is embedded in the cushion body of different hardness, the seating feeling of the cushion body of different hardness is not impaired. Furthermore, the resulting cushion cushion body has no deep concave groove on its surface due to a partition for defining the cavity of the molding die, and there is no possibility that wrinkles are generated on the skin.
[Brief description of the drawings]
FIG. 1 is a sectional view of an embodiment of a mold according to the present invention.
FIG. 2 is a plan view of a lower die of the embodiment.
FIG. 3 is a perspective view showing the vicinity of a lower bar in the embodiment.
FIG. 4 is a longitudinal sectional view of the molding die showing a state in which a bag body is suspended in a cavity in an example of a method of manufacturing a different hardness cushion using the molding die of FIG.
FIG. 5 is a plan view of a lower mold showing a state after injection of a foaming raw material in the example.
FIG. 6 is a transverse cross-sectional view of a molding die showing a state of foaming of the foaming raw material in the example.
FIG. 7 is a vertical cross-sectional view of a molding die showing the time of taking out the different hardness cushion body in the embodiment.
FIG. 8 is a perspective view showing another example of the plastic film bag when assembling it.
FIG. 9 is a perspective view of the plastic film bag of the embodiment.
FIG. 10 is a perspective view showing a main part of another example of the mold according to the first embodiment.
FIG. 11 is a sectional view taken along line 11-11 of FIG. 10;
FIG. 12 is a perspective view showing a base side of the rod-shaped body in the embodiment.
FIG. 13 is a perspective view showing the vicinity of a mounting portion of a rod-shaped body in an example of the molding die of claim 2;
FIG. 14 is a longitudinal sectional view of the molding die showing a foaming state in an example of a method of manufacturing a different hardness cushion body using the molding die of FIG.
FIG. 15 is a vertical cross-sectional view of the molding die showing the time of extracting the rod-shaped body in the example.
FIG. 16 3 And claims 4 It is a cross-sectional view of a mold showing an example of a method of manufacturing a different hardness cushion body during its manufacture,
FIG. 17 is a cross-sectional view of a cushion cushion body obtained by the same example.
FIG. 18 is a perspective view showing an automobile seat.
FIG. 19 is a cross-sectional view showing one example of a cushion cushion body of different hardness.
FIG. 20 is a cross-sectional view of a molding die showing a conventional method of manufacturing a different hardness cushion body.
FIG. 21 is a cross-sectional view of a molding die showing another example of the conventional manufacturing method.
[Explanation of symbols]
10, 50, 65A, 65B: Mold
11, 51, 66A, 66B: Lower mold
21, 52, 67A, 67B: Upper type
12, 53, 68A, 68B: Lower mold cavity
13, 47, 53a: cavity wall surface
16, 56, 72A, 72B: rod-shaped body
25: plastic film bag
26: hole of bag
75: Foam pad
76: Plastic film
76a: hole of plastic film
P1: Foaming raw material for high hardness
P2: Low hardness foam material

Claims (4)

In a method of manufacturing a different hardness cushion body, a plurality of foaming raw materials having different hardnesses from each other are separately injected into a cavity of a lower mold of a mold, and foams having different hardnesses are integrally foam-molded.
A rod-shaped body protruding into the cavity from the cavity wall surface of the lower mold, using a molding die attached to the cavity wall surface on the base side rotatably upward,
A plastic film bag with an opening at the top and a hole at the edge thereof is suspended in the lower mold cavity through the rod-shaped body through the hole,
After injecting different foaming raw materials inside and outside the bag of the cavity, after foaming the different hardness cushion body in which foams of different hardness are integrated,
A method of manufacturing a different hardness cushion body, comprising opening the forming die, lifting the different hardness cushion body together with the rod-shaped body from the lower mold, and extracting the different hardness cushion body from the rod body. In a method of manufacturing a different hardness cushion body, a plurality of foaming raw materials having different hardnesses from each other are separately injected into a cavity of a lower mold of a mold, and foams having different hardnesses are integrally foam-molded.
A rod-shaped body protruding into the cavity from the cavity wall surface of the lower mold is formed by using a molding die that is removably inserted into the cavity wall surface,
A plastic film bag with an opening at the top and a hole at the edge thereof is suspended in the lower mold cavity through the rod-shaped body through the hole,
Injecting different foaming materials inside and outside the bag of the cavity to form a foam of a different hardness cushion body in which foams of different hardness are integrated,
During or after the foaming, the rod is pulled out of the cavity of the lower mold by pulling out the wall of the lower mold,
Thereafter, the method of removing the different hardness cushion body from the mold is provided. A foaming pad is placed at a predetermined position on the bottom surface of the lower mold cavity of the molding die, and a foaming material that becomes a foam having a hardness different from that of the foaming pad is injected into the cavity to form a foam formed from the foaming material. In a method of manufacturing a different hardness cushion body in which the body and the foam pad are integrated,
A rod-shaped body that is projected from the cavity wall surface of the lower mold to near the both edges of the foam pad in the cavity, using a molding die attached to the cavity wall surface on the base side rotatably upward,
After placing the foam pad on the bottom surface of the lower mold cavity, a plastic film having holes formed on both edges is placed on the foam pad upper surface through a rod-shaped body in the hole,
Next, a foaming material having a hardness different from that of the foaming pad is injected into the lower mold cavity to form a foam having a foam formed from the foaming material and the foam pad integrated with the foam pad. After doing
A method of manufacturing a different hardness cushion body, comprising opening the forming die, lifting the different hardness cushion body together with the rod-shaped body from the lower mold, and extracting the different hardness cushion body from the rod body. A foaming pad is placed at a predetermined position on the bottom surface of the lower mold cavity of the molding die, and a foaming material that becomes a foam having a hardness different from that of the foaming pad is injected into the cavity to form a foam formed from the foaming material. In a method of manufacturing a different hardness cushion body in which the body and the foam pad are integrated,
A rod-shaped body, which is projected from the cavity wall surface of the lower mold to near both edges of the foam pad in the cavity, is formed by using a molding die that is removably inserted into the wall surface of the cavity,
After placing the foam pad on the bottom surface of the lower mold cavity, a plastic film having holes formed on both edges is placed on the foam pad upper surface through a rod-shaped body in the hole,
Next, a foaming material having a hardness different from that of the foaming pad is injected into the lower mold cavity to form a foam having a foam formed from the foaming material and the foam pad integrated with the foam pad. And
During or after the foaming of the foaming raw material, the rod is pulled out of the lower mold cavity by pulling the rod body outward from the lower mold cavity,
Thereafter, the method of removing the different hardness cushion body from the mold is provided.

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