一种制造用于车辆排气系统的精密铸造件的方法包括使用从由蜡和塑料组成的组中选择的物质制造待制造的产品的模型，使用第一种方法在模型的表面上形成第一涂层 浆料，使用第二浆料在涂覆有第一涂层的模型的表面上形成第二涂层，干燥第一和第二涂层以形成模具并加热模具以除去模型，预加热模具， 将模具放置在顶部打开的陶瓷盒中，并用陶瓷球填充陶瓷盒的内部，并通过将熔融金属注入模具来铸造产品来生产产品。

A method for manufacturing precision casting parts for automotive exhaust system according to an embodiment of the present invention includes the steps of making a model of the product to manufacture by using a wax or plastic; Forming a first coating layer using a first slurry (Slurry) on the surface of the model; Forming a second coating layer by using the second slurry on the surface of the first coating layer is coated model; Comprising: drying the first and second coating to form a mold and heated to remove the model; Positioning the mold inside the open top box and a ceramic and filling the ceramic ball to the inside of the ceramic box, pre-heating the mold; And by casting the product to a molten metal in the molding step to produce a product; and a.