Method of making game racket frame

Details Method of making game racket frame Method of making game racket frame

1980-08-12

1982-08-10

Lowe, James B.

Plastic and nonmetallic article shaping or treating: processes

With step of making mold or mold shaping, per se

Utilizing surface to be reproduced as an impression pattern

264317, 264DIG44, 273 73C, 425468, B29C 114, B29D 2302, B29D 1200

Patent

active

043437575

ABSTRACT:
A method of making a games racket frame by injecting thermoplastics material into the space (13) between a fusible core (14) and a mould at a temperature above the melting point of the core. The core (14) is shaped to have locating lugs (15) to abut against the internal walls of the mould and hold the core in the desired position. The moulding is allowed to set and the core then melted out by raising the temperature sufficiently for that purpose but insufficiently to deform the moulding. The lugs (15) enable the core (14) to be located in the desired position in the mould and to resist displacement from that location during injection. The holes formed in the wall of the frame because of the abutment of lugs and mould wall can conveniently be utilized as stringing holes.

REFERENCES:
patent: 3520668 (1970-07-01), Keefer
patent: 3990701 (1976-11-01), Kim
patent: 4165071 (1979-08-01), Frolow

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