Foam slush molding apparatus
First Claim
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1. A foam slush molding apparatus comprising:
- a mold including a molding surface on which a resin is heated and fused;
a hot air jacket provided along and a predetermined distance apart from said molding surface to allow the free passage of hot air therethrough, said molding surface and said jacket forming a first hot air chamber therebetween, wherein in said first hot air chamber said resin is heated for foaming;
a heat retaining hood provided outside said hot air jacket, said hot air jacket and said heat retaining hood forming a second hot air chamber for heat retention;
a first hot air duct connected to said first hot air chamber through an opening in said hot air jacket;
a second hot air duct connected to said second hot air chamber; and
switching means to divert hot air alternately and controllably to said first hot air duct and to said second hot air duct.
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Abstract
The foam slush molding apparatus of this invention comprises a mold and a hot air jacket, and an optional heat retaining hood. The hot air jacket and the optional heat retaining hood are provided along and a certain distance apart from the molding surface on which a resin is heated and fused. The molding surface and the jacket form a first hot air chamber for heating, and the jacket and the optional heat retaining hood form an optional second hot air chamber for heat retention. The apparatus permits uniform heating and foaming at an efficient molding cycle.
32 Citations
9 Claims
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1. A foam slush molding apparatus comprising:
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a mold including a molding surface on which a resin is heated and fused; a hot air jacket provided along and a predetermined distance apart from said molding surface to allow the free passage of hot air therethrough, said molding surface and said jacket forming a first hot air chamber therebetween, wherein in said first hot air chamber said resin is heated for foaming; a heat retaining hood provided outside said hot air jacket, said hot air jacket and said heat retaining hood forming a second hot air chamber for heat retention; a first hot air duct connected to said first hot air chamber through an opening in said hot air jacket; a second hot air duct connected to said second hot air chamber; and switching means to divert hot air alternately and controllably to said first hot air duct and to said second hot air duct. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9)
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Specification