Foaming and punching tool and method for producing foamed products
The invention relates to a foaming and punching tool for producing foamed products from structural foam, and to a method for producing such foamed products.
1. A foaming and punching tool for producing foamed products made of integral foam, comprising a lower mold and a circumferential top piece present at an upper side thereof, which forms a groove together with said lower mold that faces a mold cavity, and an upper mold,
wherein in a first closed condition said upper mold, due to spacers, penetrates into the mold cavity only to such an extent that the groove can receive foaming material, and
in a second closed condition said upper mold penetrated deeper into the mold cavity after said spacers have been removed and optionally replaced by thinner spacers, and can remove material present in the groove by punching on its way into a latter condition.
2. The foaming and punching tool for producing foamed products made of integral foam according to claim 1 , characterized in that said lower mold and said upper mold can be temperature-controlled each independently of a corresponding mold.
3. The foaming and punching tool for producing foamed products made of integral foam according to claim 1 , characterized in that said lower mold and said upper mold and/or are directed mechanically, pneumatically and/or hydraulically.
4. A method for producing foamed products made of integral foam in a foaming and punching tool comprising a lower mold and a circumferential top piece, which forms a groove together with said lower mold that faces the a mold cavity, and an upper mold, wherein
foamable material is added into the lower mold,
the lower mold is closed to form a groove between the lower mold and the circumferential top piece,
the foamable material foams to fill the mold cavity and the groove,
and the foamable material present in the groove is removed by punching in one or more steps after foaming and curing of the foam by removing spacers and allowing the upper mold to penetrate deeper into the mold cavity,
the lower mold and the upper mold are separated, and
a foam part is removed.
5. The method according to claim 4 , characterized in that a polyurethane reaction mixture is employed as said foamable material.
6. The method according to claim 4 , characterized in that molds and/or are directed mechanically, pneumatically and/or hydraulically.