Method for manufacturing hollow air spoiler

• US 5,240,536 A
• Filed: 04/30/1992
• Issued: 08/31/1993
• Est. Priority Date: 12/16/1989
• Status: Expired due to Term

• Current Assignee: Sakae Riken Kogyo Company Limited
• Original Assignee: Sakae Riken Kogyo Company Limited
• Inventors: Kurobe, Masami
• Primary Examiner(s): Weston, Caleb
• Assistant Examiner(s): Lorin, Francis J.
• Application Number:
  US07/876,911
• Time in Patent Office: 488 Days
• Field of Search: 156/228, 156/304.2, 156/304.6, 156/308.4, 156/309.9, 156/292, 156/157, 156/158, 156/304.5, 156/499, 156/267, 156/145, 156/146, 156/147, 296/180.1, 219/228, 219/243, 264/249, 264/545, 425/289
• US Class Current: 156/228
• CPC Class Codes: B29C 65/2076 perpendicularly to the plane comprising the parts to be joined
• CPC Class Codes: B29C 65/305 involving the use of cartridge heaters
• CPC Class Codes: B29C 66/0042 of the joining tool and the parts to be joined B29C66/0046 takes precedence; joining tool characterized by its composition B29C66/8122; joining tool characterized by its microstructure B29C66/8124
• CPC Class Codes: B29C 66/1142 Single butt to butt joints
• CPC Class Codes: B29C 66/54 Joining several hollow-preforms, e.g. half-shells, to form hollow articles, e.g. for making balls, containers; Joining several hollow-preforms, e.g. half-cylinders, to form tubular articles
• CPC Class Codes: B29C 66/71 characterised by the composition of the plastics material of the parts to be joined welding bar compositions B29C65/125
• CPC Class Codes: B29C 66/8122 characterised by the composition of the material constituting the pressing elements, e.g. constituting the welding jaws or clamps
• CPC Class Codes: B29C 66/83221 cooperating reciprocating tools, each tool reciprocating along one axis
• CPC Class Codes: B29K 2055/02 ABS polymers, i.e. acrylonitrile-butadiene-styrene polymers
• CPC Class Codes: B29K 2067/006 PBT, i.e. polybutylene terephthalate
• CPC Class Codes: B29K 2069/00 Use of PC, i.e. polycarbonates or derivatives thereof, as moulding material
• CPC Class Codes: B29K 2071/12 PPO, i.e. polyphenylene oxide; PPE, i.e. polyphenylene ether
• CPC Class Codes: B29K 2077/00 Use of PA, i.e. polyamides, e.g. polyesteramides or derivatives thereof, as moulding material
• CPC Class Codes: B29K 2827/18 PTFE, i.e. polytetrafluorethene, e.g. ePTFE, i.e. expanded polytetrafluorethene
• CPC Class Codes: B29L 2031/3055 Cars
• CPC Class Codes: B62D 35/007 Rear spoilers B62D35/001 takes precedence
• CPC Class Codes: Y02T 10/82 Elements for improving aerodynamics
• CPC Class Codes: Y10T 156/108 Flash, trim or excess removal

Abstract

A method for manufacturing a hollow air spoiler comprising the steps of setting upper and lower parts molded from thermoplastic synthetic resin material by the injection molding method to upper and lower fixed jigs, placing a heater device between the upper and lower parts, pressurizing the upper and lower fixed jigs by bringing them together under pressure, contacting the outer layers of end faces of the upper and lower parts to the heater device under pressure, opening the upper and lower fixed jigs at the time point it has reached a desired melting degree from the outer layers of the end faces toward inside, removing the heater device from the upper and lower fixed jigs, closing the upper and lower fixed jigs, maintaining the pressure until it has reached to a desired dimension directing inwardly from the outer layers of the end faces, opening the upper and lower fixed jigs to remove a product therefrom at the time point the molten thermoplastic synthetic resin material is fixed and united, removing an outwardly expanded portion of synthetic resin material owing to welding under pressure to obtain an intermediate product, and applying a coating to the intermediate product to obtain a finished product.

Claims

1. A method for manufacturing a hollow air spoiler comprising the steps of setting upper and lower injection molded thermoplastic synthetic resin parts having curved rear and lateral outer surfaces and curved end faces into upper and lower fixed jigs including facing surfaces having recesses therein of a curvature conforming to that of the curved rear and lateral outer surfaces of the corresponding part received therein, the relative sizes of the recesses in the jigs and the corresponding parts being such that the lateral portions of the synthetic resin parts are enclosed within the respective recesses and terminal portions of said lateral portions which define said end faces extend outwardly from the recesses so as to project outwardly beyond the facing surfaces of the respective jigs, and said jigs including opposing grooves therein which extend around the corresponding recess adjacent the corresponding facing surface and which are brought into registration when said jigs are closed and said facing surfaces are brought together, placing between said upper and lower parts a heater device having upper and lower curved surfaces each of a curvature matching that of a corresponding curved end face of said upper and lower parts and including heating means distributed over the full length of the heater device to provide uniform heating, bringing together under pressure said upper and lower fixed jigs, contacting the said end faces of said upper and lower parts to said heater device under pressure, opening said upper and lower fixed jigs when a desired degree of melting of said end faces has been achieved, removing said heater device from said upper and lower fixed jigs, closing said upper and lower fixed jigs and applying pressure, maintaining the applied pressure until a desired dimension extending inwardly from said end faces has been achieved and said terminal portions have been joined together to form an outwardly expanded portion of the synthetic resin of the parts which extends around the joined area between the end faces of the parts and which fills the opposing grooves brought into registration with each other when the jigs are closed, opening said upper and lower fixed jigs to remove a product therefrom when the molten thermoplastic synthetic resin of the parts is fixed and united, removing the outwardly expanded portion of the synthetic resin of the parts produced during the application of pressure to thereby obtain an intermediate product, and applying a coating to said intermediate product to obtain a finished product.