The most expensive outdoor gas stoves sold today on the market are made by Monessen Hearth Systems Company. They produce the Vermont Castings Signature series stoves and fireplaces. Although they are also known to make several types of barbecue grills, the Vermont Castings brand has made a reputation for providing the most stove parts and grill accessories in the market. They make several types of fireplace models of the finest quality, yet it is the replacement parts for their grills that are sought after all over the country. The availability of parts and ease of which one can replace a stove part on any model of a Vermont Castings stove makes them one of the popular choices among many stove manufacturers.
Draft - The mold used to create a die-cast part has to be designed so that the part can be easily removed from the mold after the part has been cast and has cooled. Draft is a slight angle designed into the vertical surfaces of the die to allow easier ejection of the part from the die after the die-casting process. Draft angles between 1o and 3o are common.
Fillet - A fillet is a radius at a corner where two surfaces meet, rather than having a sharp corner. An internal fillet reduces the stresses that occur in that location when the part is bent or stressed. An external fillet radius is used to eliminate sharp edges.
Undercut - An undercut is a feature of the die-cast part that prevents the piece from being ejected from the die after casting. Designs that require an undercut necessitate complex dies with removable slides so that the part can be extracted after casting. It is generally more cost effective to redesign the part to eliminate undercuts.
Mold Components
In order to create different design elements within a die-cast part, several components are used within the mold. The die may also include removable slides or other sections to produce a component with recesses, undercuts, or cores. The use of these components increases the complexity of the mold design and the casting process, but their use generally results in less metal alloy being used and better tolerances throughout the part. Some of the mold components include:
Core - A core is a circular or other shaped section or pin that is used to create a void in a die cast part. The core can be moveable or fixed, depending on the design of the part to be made.