MOLDING METHOD OF RESIN MOLDED PRODUCT AND RESIN MOLDED PRODUCT

• US 20150174799A1
• Filed: 06/28/2012
• Published: 06/25/2015
• Est. Priority Date: 07/14/2011
• Status: Abandoned Application

• Current Assignee: Kyoraku Co.,Ltd.
• Original Assignee: Kyoraku Co.,Ltd.
• Inventors: Sumi, Takehiko
• Application Number:
  US14/130,003
• Publication Number:
  US 20150174799A1
• Time in Patent Office: Days
• US Class Current: 1/1
• CPC Class Codes: B29C 2049/2013 for connecting opposite walls, e.g. baffles in a fuel tank
• CPC Class Codes: B29C 2948/92561 Time, e.g. start, termination, duration or interruption
• CPC Class Codes: B29C 44/1233 the preformed parts being supported during expanding
• CPC Class Codes: B29C 48/0017 combined with blow-moulding or thermoforming
• CPC Class Codes: B29C 48/0021 combined with joining, lining or laminating
• CPC Class Codes: B29C 48/08 flexible, e.g. films
• CPC Class Codes: B29C 48/305 having a wide opening, e.g. for forming sheets
• CPC Class Codes: B29C 51/12 of articles having inserts or reinforcements
• CPC Class Codes: B29C 51/262 Clamping means for the sheets, e.g. clamping frames
• CPC Class Codes: B29C 51/267 Two sheets being thermoformed in separate mould parts and joined together while still in the mould B29C49/0691 takes precedence
• CPC Class Codes: B29C 65/028 making use of inherent heat, i.e. the heat for the joining comes from the moulding process of one of the parts to be joined
• CPC Class Codes: B29C 65/7441 for making welds and cuts of other than simple rectilinear form
• CPC Class Codes: B29C 66/1122 Single lap to lap joints, i.e. overlap joints B29C66/45, B29C66/472, B29C66/52272 take precedence
• CPC Class Codes: B29C 66/1142 Single butt to butt joints
• CPC Class Codes: B29C 66/433 Casing-in, i.e. enclosing an element between two sheets by an outlined seam for bookbinding B42C11/06; for packaging B65B; by laminating B32B37/00; enclosing tubular articles between substantially flat elements B29C66/53261
• CPC Class Codes: B29C 66/721 Fibre-reinforced materials B29C66/729 takes precedence
• CPC Class Codes: B29C 66/727 being porous, e.g. foam
• CPC Class Codes: B29C 66/81427 comprising a single ridge, e.g. for making a weakening line; comprising a single tooth
• CPC Class Codes: B29C 66/81431 comprising a single cavity, e.g. a groove
• CPC Class Codes: B29K 2025/04 Polymers of styrene
• CPC Class Codes: B29L 2009/00 : Layered products
• CPC Class Codes: B32B 2250/03 : 3 layers
• CPC Class Codes: B32B 2250/246 : All polymers belonging to those covered by groups B32B27/32 and B32B27/30
• CPC Class Codes: B32B 2451/00 : Decorative or ornamental articles wall paper B32B2607/02
• CPC Class Codes: B32B 5/20 : foamed in situ
• CPC Class Codes: Y10T 428/249953 : Composite having voids in a component [e.g., porous, cellular, etc.]

Abstract

A molding method of a resin molded product in which it is possible to increase the welding strength between the core member and the resin sheets is provided. In a molding method of a resin molded product in which a core member including a foaming element is interposed between at least two resin sheets in a melted state into a laminated product, wherein the resin sheets include fibrous filler, and while melting surfaces of the core member by heat of the resin sheets, the core member and the resin sheets are welded onto each other, and the core member and the resin sheets are clamped by a metallic mold, to mold the resin molded product.

Claims

1. A molding method of a resin molded product in which a core member including a foaming element is interposed between at least two resin sheets in a melted state into a laminated product, characterized in that:

the resin sheets comprise fibrous filler, the method comprising;

a welding step in which while melting surfaces of the core member by heat of the resin sheets, the core member and the resin sheets are welded onto each other; and

a molding step in which the core member and the resin sheets are clamped by a metallic mold, to mold the resin molded product.

2. A molding method of a resin molded product in accordance with claim 1, characterized in that the core member and the resin sheets comprise styrene-based resin.

3. A molding method of a resin molded product in accordance with claim 1, characterized in that the core member and the resin sheets are compressed by clamping the metallic mold.

6. A molding method of a resin molded product in accordance with claim 2, characterized in that the core member and the resin sheets are compressed by clamping the metallic mold.

4. A resin molded product in which a core member including a foaming element is interposed between at least two resin sheets into a laminated product, characterized in that:

the resin sheets comprise fibrous filler; and

the resin molded product comprises a laminated structure in which the core member with melted surfaces and the resin sheets in a melted state are welded onto each other into one block.

5. A resin molded product in accordance with claim 4,

characterized in that the core member and the resin sheets comprise styrene-based resin.