tailieunhanh - Metal Casting Made Easy P2

Complete guide to hobby metal casting. Resin Coated Silicate Sands. Using cold set resins, mixed with the silica sand can also be used to make cores. These resins allow you to work the sand for a short time until it starts to go of. Generally only available in 20 litre drums or larger, so it is not really feasible for the home founder to do this until some sizeable production runs are planned. There are several foundry companies that supply these products. Foseco, a worldwide foundry supply house, has many different kinds of products to cover every foundry situation. It is well worth. | Complete guide to hobby metal casting. Resin Coated Silicate Sands. Using cold set resins mixed with the silica sand can also be used to make cores. These resins allow you to work the sand for a short time until it starts to go of. Generally only available in 20 litre drums or larger so it is not really feasible for the home founder to do this until some sizeable production runs are planned. There are several foundry companies that supply these products. Foseco a worldwide foundry supply house has many different kinds of products to cover every foundry situation. It is well worth your while to investigate using these products as they are easy to use and give very repeatable results with all types of metal casting applications. Ask for the information sheets to be sent to you. There is no one correct way to do things with foundry work. If three different foundries were visited you would find that they all have different ways methods of doing things. You will discover certain methods that will work well for you. The idea is to get REPEATABLE RESULTS It helps to make notes as you work on your projects don t rely on your memory for details. If you don t go near your foundry work for a month or two you might be lost if you can t remember a certain process or method that you used to get a particular result. An easy way to create special shaped holes in castings is to make up steel cores in the lathe they are then set in the pattern before you start ramming up. When the mould is complete and the pattern extracted the steel core is held captive by the sand. After the pour is complete and the casting has been retrieved from the sand you can cut the gates and runners off. The steel core is then pressed out of the casting. I use this method to make the spring caps which are shown in a previous discussion. The method is quick and easy and works every time. The steel core is smeared with oil and dipped into a container of graphite powder. The graphite coating prevents .