{"product_id":"rio-grande-cast-in-one™-penta-form™-sprue-button","title":"Rio Grande Cast-In-One™ Penta-Form™ Sprue Button","description":"\u003cp\u003eThe heart of the Rio Grande Cast-In-One™ design, this wax Penta-form™ structure not only acts as the sprue button in the treeing and casting processes for this machine, but also makes it possible to cast without a crucible. The Penta-form is a small, flat-topped, five-legged structure that seats into five tiny corresponding holes designed into the apex of the high \"button\" on the rubber base; these holes will ultimately be the pathway for the molten metal to enter the pattern molds.\n\u003c\/p\u003e\u003cul\u003e\n\u003cli\u003eIn building, then investing, your wax tree and its patterns, do not allow wax to get into the 1\/8\" of space between the Penta-form and the rubber base below it; any wax here will prevent proper investing and impede (or prevent) the metal flow during the cast.\n\u003c\/li\u003e\n\u003cli\u003eDuring the burnout, the tree, models and Penta-form™ structure melt and are evacuated from the investment, leaving behind five tiny holes between the empty \"button\" reservoir and the pattern molds.\n\u003c\/li\u003e\n\u003cli\u003eWhen the melt temperature is reached, pressure and vacuum are simultaneously applied, effectively drawing the molten metal through the five holes and into the patterns below.\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"Rio Grande","offers":[{"title":"Default Title","offer_id":52781132317018,"sku":"710623","price":9.45,"currency_code":"EUR","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0934\/7897\/7882\/files\/710623in.jpg?v=1763531923","url":"https:\/\/www.amadesa.com\/pt-pt\/products\/rio-grande-cast-in-one%e2%84%a2-penta-form%e2%84%a2-sprue-button","provider":"Amadesa","version":"1.0","type":"link"}