WO2012008518A1 - 発泡成形体の製造方法、発泡成形体の製造装置および発泡成形体 - Google Patents
発泡成形体の製造方法、発泡成形体の製造装置および発泡成形体 Download PDFInfo
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- WO2012008518A1 WO2012008518A1 PCT/JP2011/066068 JP2011066068W WO2012008518A1 WO 2012008518 A1 WO2012008518 A1 WO 2012008518A1 JP 2011066068 W JP2011066068 W JP 2011066068W WO 2012008518 A1 WO2012008518 A1 WO 2012008518A1
- Authority
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- WIPO (PCT)
- Prior art keywords
- foaming
- foam
- space
- raw material
- cavity surface
- Prior art date
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- 239000006260 foam Substances 0.000 title claims abstract description 98
- 238000004519 manufacturing process Methods 0.000 title claims abstract description 39
- 238000005187 foaming Methods 0.000 claims abstract description 128
- 238000000034 method Methods 0.000 claims abstract description 21
- 230000002093 peripheral effect Effects 0.000 claims description 39
- 239000002994 raw material Substances 0.000 claims description 32
- 238000007789 sealing Methods 0.000 claims description 7
- 238000000465 moulding Methods 0.000 claims description 6
- 239000000463 material Substances 0.000 abstract description 7
- 230000003014 reinforcing effect Effects 0.000 description 25
- 230000035699 permeability Effects 0.000 description 4
- 230000000694 effects Effects 0.000 description 3
- 239000002184 metal Substances 0.000 description 3
- 230000015572 biosynthetic process Effects 0.000 description 2
- 239000000470 constituent Substances 0.000 description 2
- 238000007796 conventional method Methods 0.000 description 2
- JOYRKODLDBILNP-UHFFFAOYSA-N Ethyl urethane Chemical compound CCOC(N)=O JOYRKODLDBILNP-UHFFFAOYSA-N 0.000 description 1
- 229920005830 Polyurethane Foam Polymers 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 239000004745 nonwoven fabric Substances 0.000 description 1
- 239000011496 polyurethane foam Substances 0.000 description 1
- 230000002787 reinforcement Effects 0.000 description 1
- 239000011347 resin Substances 0.000 description 1
- 229920005989 resin Polymers 0.000 description 1
Images
Classifications
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C44/00—Shaping by internal pressure generated in the material, e.g. swelling or foaming ; Producing porous or cellular expanded plastics articles
- B29C44/34—Auxiliary operations
- B29C44/58—Moulds
- B29C44/588—Moulds with means for venting, e.g. releasing foaming gas
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C44/00—Shaping by internal pressure generated in the material, e.g. swelling or foaming ; Producing porous or cellular expanded plastics articles
- B29C44/02—Shaping by internal pressure generated in the material, e.g. swelling or foaming ; Producing porous or cellular expanded plastics articles for articles of definite length, i.e. discrete articles
- B29C44/12—Incorporating or moulding on preformed parts, e.g. inserts or reinforcements
- B29C44/1271—Incorporating or moulding on preformed parts, e.g. inserts or reinforcements the preformed parts being partially covered
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B3/00—Layered products comprising a layer with external or internal discontinuities or unevennesses, or a layer of non-planar shape; Layered products comprising a layer having particular features of form
- B32B3/26—Layered products comprising a layer with external or internal discontinuities or unevennesses, or a layer of non-planar shape; Layered products comprising a layer having particular features of form characterised by a particular shape of the outline of the cross-section of a continuous layer; characterised by a layer with cavities or internal voids ; characterised by an apertured layer
- B32B3/30—Layered products comprising a layer with external or internal discontinuities or unevennesses, or a layer of non-planar shape; Layered products comprising a layer having particular features of form characterised by a particular shape of the outline of the cross-section of a continuous layer; characterised by a layer with cavities or internal voids ; characterised by an apertured layer characterised by a layer formed with recesses or projections, e.g. hollows, grooves, protuberances, ribs
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C33/00—Moulds or cores; Details thereof or accessories therefor
- B29C33/10—Moulds or cores; Details thereof or accessories therefor with incorporated venting means
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C44/00—Shaping by internal pressure generated in the material, e.g. swelling or foaming ; Producing porous or cellular expanded plastics articles
- B29C44/02—Shaping by internal pressure generated in the material, e.g. swelling or foaming ; Producing porous or cellular expanded plastics articles for articles of definite length, i.e. discrete articles
- B29C44/12—Incorporating or moulding on preformed parts, e.g. inserts or reinforcements
- B29C44/14—Incorporating or moulding on preformed parts, e.g. inserts or reinforcements the preformed part being a lining
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29L—INDEXING SCHEME ASSOCIATED WITH SUBCLASS B29C, RELATING TO PARTICULAR ARTICLES
- B29L2031/00—Other particular articles
- B29L2031/58—Upholstery or cushions, e.g. vehicle upholstery or interior padding
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
- Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
- Y10T428/00—Stock material or miscellaneous articles
- Y10T428/24—Structurally defined web or sheet [e.g., overall dimension, etc.]
- Y10T428/24479—Structurally defined web or sheet [e.g., overall dimension, etc.] including variation in thickness
- Y10T428/24496—Foamed or cellular component
Definitions
- the present invention relates to a foam molded body manufacturing method, a foam molded body manufacturing apparatus, and a foam molded body in which a foam formed by foaming a foam raw material and a breathable member are integrally fixed.
- the present invention relates to a foam molded article.
- Patent Document 1 As a conventional method for producing a foamed molded article, for example, a method as shown in Patent Document 1 below is known.
- the method uses an apparatus for manufacturing a foamed molded article having cavities defined by respective cavity surfaces between a plurality of mold members.
- the cavity includes a foaming start space to which a foaming raw material is supplied, and a foaming end space that is connected to the foaming start space and is reached by foaming of the foaming raw material in the foaming start space.
- this method includes an arrangement step of disposing a breathable member on an opening cavity surface where a gas vent hole opens, a supply step of supplying a foaming raw material to a foaming start space, and a foaming raw material in a foaming end space.
- the foaming step is performed to form a foam and to fix the foam and the breathable member integrally.
- foaming raw material is foamed in the cavity, and foaming gas, air, and the like in the cavity are exhausted from the vent hole through the air-permeable member to form a foamed molded body.
- the present invention has been made in view of the above-described circumstances, and an object of the present invention is to provide a method for producing a foam molded body capable of forming the foam molded body with high accuracy.
- the method for producing a foamed molded product according to the present invention is formed by foaming a foaming raw material using a foamed molded product manufacturing apparatus including a cavity defined by each cavity surface between a plurality of mold members.
- This is a method for producing a foamed molded product that forms a foamed molded product in which the foamed product and the breathable member are integrally fixed.
- the cavity is: a foaming start space to which the foaming raw material is supplied, and this foaming start space, and the foaming raw material in the foaming start space is reached and filled.
- a foam termination space is: a foaming start space to which the foaming raw material is supplied, and this foaming start space, and the foaming raw material in the foaming start space is reached and filled.
- the manufacturing method of the foam molded body includes an arranging step of arranging the air-permeable member on the surface of the opening cavity to cover the gas vent hole, a supplying step of supplying the foaming raw material to the foaming start space, and the foaming A foaming step of causing the raw material to reach the foaming end space and foaming until the inside of the foaming end space is filled with the foaming raw material, forming the foam and fixing the foam and the breathable member integrally. And having.
- the air permeable member is arranged on the surface of the open cavity so as to be connected to a gas escape groove formed in a peripheral portion of the surface of the open cavity.
- the breathable member is connected to the gas escape groove during the placement process and placed on the open cavity surface. Therefore, during the foaming process, foaming gas, air, etc. accumulated in the foaming end space can be exhausted from the gas vent hole through the gas escape groove and the air-permeable member. Therefore, a foaming molding can be formed with high accuracy.
- the air permeable member is disposed on the surface of the open cavity so that the outer peripheral edge of the air permeable member is positioned inside the peripheral edge of the open cavity surface that is continuous with the parting surface during the disposing step. To do. Therefore, it is possible to prevent the air-permeable member from being sandwiched between the parting surfaces that face each other. Furthermore, it can suppress that foaming of the foaming member in foaming termination
- the foam molded body manufacturing apparatus is a foam molded body manufacturing apparatus used in the foam molded body manufacturing method, wherein the gas escape groove is continuous with a parting surface of the open cavity surface. It is spaced apart from the peripheral edge.
- the gas escape groove is disposed away from the peripheral edge of the opening cavity surface. Therefore, during the foaming step, the foaming material that foams in the gas escape groove does not enter between the parting surfaces that are abutted with each other from the gas escape groove. Therefore, it becomes possible to suppress the formation of burrs on the foam, and the foam molded product can be reliably formed with high accuracy.
- a sealing member for sealing between the parting surfaces may be disposed between the parting surfaces that face each other.
- the above-described effects are remarkably exhibited. That is, since the sealing member is disposed between the parting surfaces that are abutted with each other, during the foaming process, foaming gas, air, etc. accumulated in the foaming end space are exposed to the outside through the parting surfaces. It is difficult to exhaust. However, since these foaming gas, air, and the like can be exhausted from the gas vent hole through the gas escape groove and the air-permeable member, the foamed molded product can be more reliably formed with high accuracy.
- the foam molded body according to the present invention is a foam molded body in which a foam formed by foaming a foam raw material and a breathable member are integrally fixed, and the manufacture of the foam molded body Manufactured by the method.
- a convex strip is formed by the gas escape groove on the surface of the portion of the foam formed by the foam termination space, and the breathable member is integrally fixed to the convex strip.
- the foamed molded product is manufactured by the method for manufacturing a foamed molded product, it is difficult for an air reservoir to be formed in the foamed product, and it can be made highly accurate.
- the foamed molded product can be formed with high accuracy and a highly accurate foamed molded product can be obtained.
- FIG. 3 is a cross-sectional view taken along line AA shown in FIG. 2. It is sectional drawing of the metal mold
- FIG. 7 is a cross-sectional view taken along line BB shown in FIG. 6. It is sectional drawing of the metal mold
- seat pads 1 ⁇ / b> A and 1 ⁇ / b> B are used for a vehicle seat 1 and are fixed to a seat frame (not shown) of the vehicle.
- the seat pads 1A and 1B include a cushion pad (1A) serving as a seating portion of the seat 1 in the vehicle and a back pad (1B) serving as a backrest portion of the seat 1 in the vehicle.
- the seat pad 1A of the present embodiment is used as the cushion pad.
- the direction facing the vertical upper side is the upper side
- the direction facing the vertical lower side is the lower side
- the direction facing the front of the vehicle is the front side
- the direction facing the rear of the vehicle is referred to as the rear side.
- the sheet pad 1A is formed by integrally fixing a foam 2 formed by foaming a foaming raw material and a reinforcing member (breathable member) 3 together.
- the foam 2 is formed by foaming a foaming raw material (for example, urethane raw material), and is formed of, for example, polyurethane foam.
- the foam body 2 includes a main body portion 4 on which an upper surface can be seated, and a projecting portion 5 that projects from the lower surface of the main body portion 4.
- the protruding portion 5 extends along the outer peripheral edge of the main body portion 4 over almost the entire circumference.
- a parting line portion 6 is formed on the end surface of the protruding portion 5 along the outer peripheral edge.
- a protruding strip portion 7 formed by a gas escape concave groove 27 of a mold (foamed molded body manufacturing apparatus) 20 described later is disposed.
- the ridge portion 7 is disposed away from the parting line portion 6. As shown in FIG. 3, the ridge 7 is bent and extended from the inner surface facing the center of the main body 4 to the end surface at the front portion 5 a located on the front side of the protruding portion 5. .
- a plurality of the ridges 7 are disposed at a predetermined interval in the front portion 5a.
- variety is set to about 2 mm and the protrusion height is set to about 2 mm, and the space
- the seat frame of the vehicle can be fitted in a recess defined on the lower surface side of the main body 4 by the main body 4 and the projecting portion 5. Furthermore, the lower surface of the main body portion 4 and the inner surface of the projecting portion 5 constitute an attachment surface 8 to which the seat frame is attached.
- the reinforcing member 3 is a membrane-like member having air permeability, and is formed of, for example, a cold chill, a coarse felt, a nonwoven fabric, or the like.
- the reinforcing member 3 is integrally fixed to the mounting surface 8 of the foam 2.
- the reinforcing member 3 is integrally fixed to the entire lower surface of the main body portion 4, and is integrally fixed to the inner surface of the front portion 5 a of the protruding portion 5 and the ridge portion 7.
- the mold 20 includes a cavity 23 defined by a cavity surface 21 a of the upper mold 21 and a cavity surface 22 a of the lower mold 22 between the upper mold 21 and the lower mold 22 (a plurality of mold members).
- the cavity surface 22 a of the lower mold 22 is formed in the center of the lower mold 22, and the cavity surface 21 a of the upper mold 21 projects from the center of the upper mold 21 toward the lower mold 22. It is formed to do.
- the parting surface 21 b connected to the peripheral edge 21 c of the cavity surface 21 a is abutted against the parting surface 22 b of the lower mold 22.
- a seal member 28 that seals between the parting surfaces 21b and 22b is disposed between the parting surfaces 21b and 22b that face each other.
- the cavity 23 includes a foaming start space 24 to which a foaming raw material is supplied, and a foaming end space 25 that is connected to the foaming start space 24 and is reached and filled by foaming of the foaming raw material in the foaming start space 24.
- the foaming start space 24 forms the main body portion 4 of the foam 2
- the foam end space 25 forms the protruding portion 5 of the foam 2.
- the foaming start space 24 is defined by the inner side 21f of the peripheral part 21e of the cavity surface 21a of the upper mold 21 and the inner side of the peripheral part of the cavity surface 22a of the lower mold 22.
- a gas vent hole 26 that opens the inside and the outside of the cavity 23 is opened.
- a plurality of vent holes 26 are formed in the cavity surface (opening cavity surface) 21 a of the upper mold 21.
- the foam end space 25 extends along the outer peripheral edge of the foam start space 24 over substantially the entire circumference.
- the foam termination space 25 is defined by a peripheral edge 21 e of the cavity surface 21 a of the upper mold 21 and a peripheral edge of the cavity surface 22 a of the lower mold 22. In the foam termination space 25, the peripheral edge 21c of the cavity surface 21a of the upper mold 21 is located.
- the gas escape groove 27 is formed in the peripheral edge 21e of the cavity surface 21a of the upper mold 21.
- the gas escape groove 27 is disposed away from the peripheral edge 21 c of the cavity surface 21 a of the upper mold 21. Further, the gas escape groove 27 extends in the direction (foaming direction) in which the foaming raw material foams from the foaming start space 24 toward the foaming end space 25.
- a plurality of gas escapes are provided at intervals in the cavity surface 21a of the upper mold 21 so as to open in a portion of the foam end space 25 that forms the front portion 5a of the protruding portion 5 of the foam 2.
- a concave groove 27 is provided.
- the gas escape groove 27 has a width of about 2 mm, a depth of about 2 mm, and an interval between the gas escape grooves 27 of about 20 mm.
- a supply process for supplying the foaming raw material to the foaming start space 24 is performed.
- the foaming raw material is introduced into the inside of the cavity surface 22a of the lower mold 22 inside the portion where the foaming start space 24 is to be formed, and then the mold 20 is closed.
- a foaming process for foaming the foaming raw material in the foaming start space 24 is performed.
- the foaming material foams in the foaming direction, and the cavity 23 is gradually filled with the foaming material.
- the foaming gas and air in the foaming start space 24 are exhausted from the gas vent hole 26 through the reinforcing member 3 having air permeability.
- the foaming gas and air in the foam termination space 25 are exhausted from the gas vent hole 26 through the gas escape groove 27 and the reinforcing member 3.
- the foaming raw material reaches the foaming end space 25, and the inside of the foaming end space 25 is filled with the foaming raw material.
- Foaming of the foaming material is stopped and resination (resin reaction) of the foaming material proceeds to form the foam 2 in the cavity 23, and the reinforcing member 3 is firmly fixed to the foam 2.
- a sheet pad 1A capable of holding a fixed shape is formed, and this foaming step is completed.
- the mold 20 is opened, and a demolding process for demolding the sheet pad 1A from the mold 20 is performed to obtain the sheet pad 1A.
- the reinforcing member 3 is connected to the gas escape groove 27 and arranged on the cavity surface 21 a of the upper mold 21 in the arranging step. Therefore, during the foaming process, foaming gas, air, or the like accumulated in the foam termination space 25 can be exhausted from the gas vent hole 26 through the gas escape groove 27 and the reinforcing member 3. Thereby, the pad 1A for sheets can be formed with high precision.
- the reinforcing member is disposed on the cavity surface 21a of the upper mold 21 so that the outer peripheral edge of the reinforcing member 3 is positioned on the inner side of the peripheral edge 21c of the cavity surface 21a of the upper mold 21 in the arranging step. 3 is arranged. In this case, it can suppress that the reinforcement member 3 is pinched
- the reinforcing member 3 is arranged on the cavity surface 21a of the upper die 21 so that the outer peripheral edge of the reinforcing member 3 is located inside the peripheral edge 21c of the cavity surface 21a of the upper die 21 during the arrangement step. It is possible to suppress the foaming of the foam member within the foam end space 25 from being inhibited by the reinforcing member 3. Therefore, foaming of the foamed member makes it possible to reliably fill the foaming end space 25 with the foaming member, and the sheet pad 1A can be formed with higher accuracy.
- the gas escape groove 27 is disposed away from the peripheral edge 21 c of the cavity surface 21 a of the upper mold 21. Therefore, during the foaming process, the foaming material that foams in the gas escape groove 27 does not enter the gas escape groove 27 between the parting surfaces 21b and 22b that face each other. Therefore, it becomes possible to suppress the formation of burrs on the foam 2, and the sheet pad 1 ⁇ / b> A can be reliably formed with high accuracy.
- the seal member 28 is disposed between the parting surfaces 21b and 22b that face each other. Therefore, the above-described operation and effects by the gas escape groove 27 and the reinforcing member 3 are effectively exhibited. That is, since the sealing member 28 is disposed between the parting surfaces 21b and 22b that are abutted with each other, foaming gas, air, and the like accumulated in the foaming end space 25 during the foaming process are separated from the parting surface. It is difficult to exhaust outside through the space between 21b and 22b. However, these foaming gas and air can be exhausted from the gas vent hole 26 through the gas escape groove 27 and the reinforcing member 3. Therefore, the sheet pad 1A can be more reliably formed with high accuracy.
- the sheet pad 1A is manufactured by the method for manufacturing the sheet pad. For this reason, it is difficult to form an air reservoir in the foam 2, and a highly accurate sheet pad 1 ⁇ / b> A can be formed.
- the seat pad 1 ⁇ / b> B of the present embodiment is used as the back pad, and is formed so that the back of the vehicle occupant hits the front surface of the main body 4 of the foam 2.
- the foam body 2 includes a main body portion 4, a projecting portion 5, a folded portion 9 extending from the projecting portion 5 toward the center portion side of the main body portion 4, and It has.
- the folded portion 9 is provided on the inverted U-shaped upper portion 5 b in the plan view extending from the both side edges to the upper edge of the main body portion 4 in the projecting portion 5.
- a parting line portion 6 is formed along.
- a plurality of projecting ridge portions 7 a and 7 b are disposed on the lower portion 5 c located on the lower side.
- the ridge portion 7 a disposed on the folded portion 9 is bent and extended from the inner surface facing the main body portion 4 side to the end surface in the folded portion 9.
- the plurality of ridges 7 a are arranged at a predetermined interval in the folded portion 9.
- the ridge 7 b is disposed in the lower portion 5 c of the protruding portion 5.
- the plurality of ridges 7b are linearly arranged on the inner surface of the lower portion 5c with a certain interval.
- the mounting surface 8 is constituted by the rear surface of the main body portion 4, the projecting portion 5, and the inner surface of the folded portion 9.
- the reinforcing member 3 is integrally fixed to all the rear surfaces of the main body portion 4, the inner surfaces of the projecting portions 5 and the turned-up portions 9, and the protruding strip portions 7 a and 7 b.
- the mold 30 includes an upper mold 21, a lower mold 22, and a core mold 31 attached to the upper mold 21.
- the core mold 31 is disposed between the central portions of the upper mold 21 and the lower mold 22 and is attached to the central section of the upper mold 21.
- the parting surface 31b of the core mold 31 is abutted against a parting surface 21d formed at the center of the upper mold 21, and the sealing member 28 is disposed between the parting surfaces 31b and 21d.
- a plurality of vent holes 26 are provided in the core mold 31 and open at a cavity surface (opening cavity surface) 31 a of the core mold 31.
- the foaming start space 24 is defined by an inner side 31f of the peripheral part 31e of the cavity surface 31a of the core mold 31 and an inner side of the peripheral part of the cavity surface 22a of the lower mold 22.
- the first foam termination space 25 a that forms the upper portion 5 b of the projecting portion 5 is formed by a first termination portion 32 that forms the projection portion 5 and a first termination portion 32.
- the second terminal portion 33 is defined by the cavity surface 21 a of the upper die 21 and the peripheral edge portion 31 e of the cavity surface 31 a of the core die 31.
- the peripheral end edge 31 c of the cavity surface 31 a of the core mold 31 is located at the second end portion 33.
- the gas escape groove 27 is formed in a portion of the peripheral edge 31 e of the cavity surface 31 a of the core mold 31 that defines the second terminal portion 33.
- the second foam end space 25b that forms the lower portion 5c of the projecting portion 5 is the peripheral portion of the cavity surface 21a of the upper mold 21 and the cavity surface 22a of the lower mold 22 , And the peripheral edge 31e of the cavity surface 31a of the core mold 31.
- the peripheral edge 31c of the cavity surface 31a of the core mold 31 is located in the second foam termination space 25b.
- a plurality of the gas escape grooves 27 are arranged at intervals in a portion of the peripheral edge portion 31e of the cavity surface 31a of the core mold 31 that defines the second foam termination space 25b.
- the mold 30 and the sheet pad 1B according to the present embodiment the same operational effects as those of the first embodiment can be obtained.
- the seal member 28 is disposed between the parting surfaces 21b, 22b, 31b, and 21d of the molds 20 and 30.
- the seal member 28 may not be provided.
- the mold 20 is formed with a plurality of gas vent holes 26 and a plurality of gas escape grooves 27.
- one gas vent hole 26 and one gas escape groove may be provided.
- the sheet pads 1A and 1B are formed by integrally adhering the reinforcing member 3 having air permeability to the foam 2.
- a member having air permeability different from that of the reinforcing member 3 may be employed.
- the pad 1A, 1B for sheets is employ
- the configuration is not limited to the sheet pad as long as the foam and the breathable member are integrally fixed.
- the foam molded body can be formed with high accuracy, and a highly accurate foam molded body can be obtained.
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- Casting Or Compression Moulding Of Plastics Or The Like (AREA)
- Moulds For Moulding Plastics Or The Like (AREA)
- Molding Of Porous Articles (AREA)
Abstract
Description
以下に、図面を参照し、本発明の第1実施形態に係るシート用パッドを説明する。図1に示すように、シート用パッド1A、1Bは、車両のシート1に用いられ、この車両の図示しないシートフレームに固定される。このようなシート用パッド1A、1Bとしては、車両におけるシート1の着座部となるクッションパッド(1A)、および車両におけるシート1の背もたれ部となるバックパッド(1B)が挙げられる。本実施形態のシート用パッド1Aは、前記クッションパッドとして用いられる。なお、以下では、シート用パッド1A、1Bが、前記シートフレームに固定された状態で、鉛直上側を向く方向を上側、鉛直下側を向く方向を下側、車両の前方を向く方向を前側、車両の後方を向く方向を後側とそれぞれ称する。
次に、本発明の第2実施形態に係るシート用パッドを説明する。この第2実施形態では、第1実施形態における構成要素と同一の部分については同一の符号を付し、その説明を省略し、異なる点についてのみ説明する。
2 発泡体
3 補強部材
7、7a、7b 凸条部
20、30 金型(発泡成形体の製造装置)
21 上型(型部材)
21a、22a、31a キャビティ面
21b、21d、22b、31b パーティング面
21c、31c キャビティ面の周端縁
21e、31e キャビティ面の周縁部
21f、31f キャビティ面の周縁部の内側
22 下型(型部材)
23 キャビティ
24 発泡開始空間
25、25a、25b 発泡終端空間
26 ガス抜き孔
27 ガス逃げ凹溝
28 シール部材
31 中子型(型部材)
Claims (4)
- 複数の型部材の間にそれぞれのキャビティ面によって画成されたキャビティを備える発泡成形体の製造装置を用いて、発泡原料が発泡することで形成された発泡体と、通気性部材と、が一体に固着されてなる発泡成形体を形成する発泡成形体の製造方法であって、
前記キャビティは、前記発泡原料が供給される発泡開始空間と、この発泡開始空間に連なり、この発泡開始空間内の発泡原料が発泡することで到達して充満される発泡終端空間と、を備え、
前記キャビティ面のうち、ガス抜き孔が開口する開口キャビティ面の周縁部は、前記発泡終端空間を画成するとともに、該開口キャビティ面の周縁部の内側は、前記発泡開始空間を画成し、
前記開口キャビティ面に前記通気性部材を配置して前記ガス抜き孔を覆わせる配置工程と、
前記発泡開始空間に前記発泡原料を供給する供給工程と、
前記発泡原料を前記発泡終端空間に到達させて該発泡終端空間内が前記発泡原料で充満されるまで発泡させ、前記発泡体を形成するとともに該発泡体と前記通気性部材とを一体に固着させる発泡工程と、を有し、
前記配置工程は、前記開口キャビティ面の周縁部に形成されたガス逃げ凹溝に前記通気性部材を接続させて前記開口キャビティ面に配置する発泡成形体の製造方法。 - 請求項1記載の発泡成形体の製造方法に用いる発泡成形体の製造装置であって、
前記ガス逃げ凹溝は、前記開口キャビティ面のうち、パーティング面に連なる周端縁から離間して配設されている発泡成形体の製造装置。 - 請求項2記載の発泡成形体の製造装置であって、
互いに突き合わされたパーティング面同士の間には、このパーティング面同士の間を封止するシール部材が配設されている発泡成形体の製造装置。 - 発泡原料が発泡することで形成された発泡体と、通気性部材と、が一体に固着されてなる発泡成形体であって、
請求項1記載の発泡成形体の製造方法で製造され、
前記発泡体のうち、前記発泡終端空間によって形成された部分の表面には、前記ガス逃げ凹溝によって凸条部が形成され、
この凸条部には、前記通気性部材が一体に固着されている発泡成形体。
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US13/809,336 US9427901B2 (en) | 2010-07-14 | 2011-07-14 | Method of manufacturing foam molded product, apparatus for manufacturing foam molded product, and foam molded product |
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US15/226,080 Division US10046488B2 (en) | 2010-07-14 | 2016-08-02 | Method of manufacturing foam molded product, apparatus for manufacturing foam molded product, and foam molded product |
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JP5905288B2 (ja) * | 2012-02-13 | 2016-04-20 | 株式会社ブリヂストン | 金型、発泡成形体の製造方法 |
JP6180859B2 (ja) * | 2013-09-10 | 2017-08-16 | デルタ工業株式会社 | 一体発泡成形品の製造方法 |
WO2018211743A1 (ja) * | 2017-05-16 | 2018-11-22 | 株式会社ブリヂストン | 発泡成形型、および発泡成形体の製造方法 |
JP2020081171A (ja) * | 2018-11-20 | 2020-06-04 | 株式会社ブリヂストン | シートパッド、及び、シートパッドの製造方法 |
BR112021016336A2 (pt) | 2019-02-19 | 2021-10-26 | Proprietect L.P. | Arranjo para moldar um artigo compósito, método para moldar um artigo compósito e artigo compósito |
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JPH06339935A (ja) * | 1993-06-01 | 1994-12-13 | Inoac Corp | 発泡成形型 |
JPH09174577A (ja) * | 1995-12-26 | 1997-07-08 | Tokai Kogyo Kk | 発泡成形体の成形方法 |
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US10046488B2 (en) | 2018-08-14 |
US9427901B2 (en) | 2016-08-30 |
JP5816419B2 (ja) | 2015-11-18 |
US20130122258A1 (en) | 2013-05-16 |
US20160339613A1 (en) | 2016-11-24 |
CN102971125A (zh) | 2013-03-13 |
CN102971125B (zh) | 2015-11-25 |
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