Classifications

• • 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
  • 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
  • B29C44/145—Incorporating or moulding on preformed parts, e.g. inserts or reinforcements the preformed part being a lining the lining being a laminate
• • 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
• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
  • B29K—INDEXING SCHEME ASSOCIATED WITH SUBCLASSES B29B, B29C OR B29D, RELATING TO MOULDING MATERIALS OR TO MATERIALS FOR MOULDS, REINFORCEMENTS, FILLERS OR PREFORMED PARTS, e.g. INSERTS
  • B29K2075/00—Use of PU, i.e. polyureas or polyurethanes or derivatives thereof, as moulding material
• • 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
  • B29L2031/30—Vehicles, e.g. ships or aircraft, or body parts thereof
• • 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
• • 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
  • B29L2031/771—Seats

Definitions

• the invention relates to a method of making a padding for a motor vehicle seat.
• the aim of the invention is to overcome these drawbacks.
• the invention provides a method for producing a motor vehicle seat padding, said method comprising the following steps:
• thermoplastic film • stick a thermoplastic film on one side of said first format
• each of said drums having a free end bearing on said film around each of said perforations by compressing said first format when said lid is closed, in order to make a seal around each of said perforations, • injecting into said cap a precursor mixture of elastically compressible foam, so as to produce a foam padding block overmolding the back of said cap and being provided with a plurality of said conduits, said mixture being prevented from entering said perforations by the joints,
• the ventilation ducts are made directly during the block molding operation, the compression produced by the drums associated with the presence of the film also preventing the passage of foam into the perforations.
• FIG.1 is a schematic view in partial section of a padding being produced just before it is removed from the mold
• FIG.2 is a view similar to Figure 1 of the padding once removed from the mold.
• a method for producing a padding 1 for a motor vehicle seat comprising the following steps:
• thermoplastic film 12 on one side of said first format, • making perforations 11 in said first format provided with said film, so that said perforations open out on either side,
• each of said drums • placing said cap in said tank, said second format being disposed against the wall of said tank, each of said drums having a free end 15 bearing on said film around each of said perforations by compressing said first format when said lid is closed, in order to to produce a seal 18 around each of said perforations,
• the medallion 6 can be associated edge to edge, in particular by stitching, with at least one additional complex format comprising at least one layer of additional coating material - which may be of the same type as that of said medallion - of so as to make the dressing cap.
• the first format 2 is based on foam, in particular on polyurethane.
• the first format 2 has a thickness between
• the first format 2 has a density of between 26 and 30 kg / m 3 .
• the film 12 is based on polyurethane
• the film 12 is hot glued, for example at a temperature of between 65 and 80 ° C.
• the film 12 has a thickness of between 50 and 100 microns.
• the second format 3 is provided with a reinforcing layer 16 - so as to prevent its removal after the molding of the block
• a reinforcing mesh 17 is interposed between the film 12 and the first format 2.
• the cover 8 is in one piece, the drums 13 being made from material from said cover.
• the drums 13 are part of a structure separate from the cover 8, said drums being supported on the first format 2 by closing said cover resting on said structure.

Landscapes

• Casting Or Compression Moulding Of Plastics Or The Like (AREA)
• Moulds For Moulding Plastics Or The Like (AREA)
• Seats For Vehicles (AREA)

Applications Claiming Priority (2)

Publications (1)

Family

ID=70295452

Family Applications (1)

Country Status (3)

Family Cites Families (3)

• 2020
  • 2020-02-25 FR FR2001851A patent/FR3107467B1/fr active Active
• 2021
  • 2021-02-25 WO PCT/EP2021/054730 patent/WO2021170742A1/fr not_active Ceased
  • 2021-02-25 EP EP21706980.6A patent/EP4110575A1/de not_active Withdrawn

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