Injection foam molding method
AssigneeToyota Jidosha Kabushiki Kaisha
InventorsTsuyoshi Kameyama, Kikuo Sugimura, Taro Fukuta, Hirokazu Kandori
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Abstract
In an injection foam molding method, a relationship between a flow front moving speed (cm/s) of a foamed resin material in an injection step of injecting the foamed resin material into a cavity and amount of gas generated per 1 g of a resin material (ml/g) is defined as follows: the amount of gas generated per 1 g of the resin material is 0.36 ml/g or more; and the flow front moving speed (cm/s) is 75×the amount of gas generated per 1 g of the resin material (ml/g)−35 or more and 12 cm/s or more.
Claims3
An injection foam molding method that injects and foams a foamed resin material obtained by mixing a resin material and a foaming agent into a cavity of a mold so as to mold an injection foam molded article into a shape corresponding to a shape of the cavity,
- the method comprising:
- injecting the foamed resin material into the cavity in an injection step,
- wherein, in the injection step, a relationship between a flow front moving speed (cm/s) of the foamed resin material in the injection step and amount of gas generated per 1 g of the resin material (ml/g), is defined by following conditions:
- the amount of gas generated per 1 g of the resin material is 0.36 ml/g or more;
- and
- the flow front moving speed (cm/s) is 75×the amount of gas generated per 1 g of the resin material (ml/g)−35 or more and 12 cm/s or more.
Dependencies are inferred from the claim text.