US 5,324,462 AGranted

Process for the manufacture of moulded material-covered product

AssigneeAtoma International Inc.

InventorWolfgang K. Rohn

Life of this patent

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Abstract

A process for the manufacture of moulded material-covered products is provided wherein material is placed over a mould and held by clamping means proximate the periphery of the mould and thereafter material is drawn into the mould to conform to the shape of the interior surface of the mould prior to the injection of foamable thermoplastics material into the mould to form the product. The process includes the step of disposing a stop at predetermined positions on the material so that when the material is drawn into the mould, the stop precludes further material from ingressing into the mould and any further movement of material into mould is by the stretching of material. A mould for moulding the moulded product is also provided which includes a bottom and side wall formation surrounding the bottom proximate the periphery of the bottom, the bottom carrying on its surface a design to be carried by the moulded product, the bottom being separate from the side wall formation sot hat the side wall formation can be spaced from the bottom and be lowered to engage the bottom proximate the periphery of the bottom. The bottom may be one piece or may include a base supporting a tongue movable to a raised position for receiving a bag or sack of material for the purposes of injecting foamable thermoplastics material onto the bag or sack.

Claims4

Dependent claims

A process for the manufacture of a seat back product capable of being mounted in use so as to present a back engaging surface of a predetermined shape, said method comprising the steps of:

providing a bag comprising seat back material, side edge material, and back material joined together to define a generally bag-like shape having an open end and a closed end, the material of said bag having exterior and interior surfaces, the exterior surfaces being presented exteriorly when the seat back product is mounted in use,
mounting the open end of said bag in an inside-out condition onto a tongue-like mould part having the complement of said predetermined shape on a mould surface thereof so that the exterior surface of said seat back material faces toward said mould surface and the interior surface faces away from said mould surface,
shaping the exterior surface of said seat back material of said bag into the predetermined shape by conforming it to the mould surface of said tongue-like mould part,
moulding and curing a foamable material between the interior surface of the seat back material and spaced cooperating mould surfaces while the exterior surface is conformed to said mould surface so as to form a foam pad bonded to the interior surface of said seat back material capable of retaining the predetermined shape of the exterior surface thereof,
removing said seat back material and said foam pad bonded thereto from said mould surfaces and said bag and bonded pad from said tongue-like mould part, and
inverting said bag and bonded pad so that the exterior surfaces of the material of the bag are exposed exteriorly and said foam pad is enclosed within the bag.

3 more elements

Dependencies are inferred from the claim text.

Facts

Application: 07/821,774Filed 16 Jan 1992 · division
Priority: CA 53715014 May 1987
Granted: 28 Jun 1994
Term ends: Not estimatedThe source records don’t support an estimate.

Classification12 codes

B29C 44/148
The preformed part being a lining: applying the foaming resin, moulding the lining or the like, with the lining turned inside out
B29C 44/143
The preformed part being a lining: means for positioning the lining in the mould
B29C 44/56
Auxiliary operations: after-treatment of articles, e.g. for altering the shape
B29C 44/58
Auxiliary operations: moulds