Molding method and resin moldings
AssigneePrime Polymer Co., Ltd.
InventorsTomoyuki Obara, Katsuhiko Tada
Life of this patent
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Abstract
A molding method which includes charging a resin composition in molten state containing not less than 7 wt % to less than 30 wt % of a fibrous fiber (A) and more than 70 wt % to not exceeding 93 wt % of a resin (B) into a die for shaping purpose when a temperature of the die is in the range of [the Vicat softening point minus 20° C.] of resin (B) to less than a melting point thereof, when resin (B) is crystalline resin, or when a temperature of the die is in the range of [the Vicat softening point minus 20° C.] to [the Vicat softening point plus 20° C.] of the resin (B), when resin (B) is non-crystalline resin, cooling the die after shaping to temperature which allows taking-out of a molded product.
Claims9
A molding method for manufacturing a resin molding by charging a resin composition comprising fibrous filler (A) and crystalline resin (B) in molten state into a die by injection, the resin composition comprising not less than 7 wt % to less than 30 wt % of the fibrous filler (A) and more than 70 wt % to not exceeding 93 wt % of the crystalline resin (B), the method comprising:
- charging the resin composition in a molten state into the die when a temperature of the die is in a range of Vicat softening point −20° C. to less than a melting point of the resin (B), thereby shaping the resin composition,
- after the resin composition is shaped, holding the temperature of the die for a predetermined time in a temperature range from a crystallization temperature −10° C. to the crystallization temperature +10° C. of the crystalline resin (B), and
- cooling down the die to a temperature which allows taking-out of a molded product.
Dependencies are inferred from the claim text.