How to ensure the accuracy of the wax mold during the production of precision casting lost wax mold?
Publish Time: 2025-01-09
In the production process of precision casting lost wax mold, it is crucial to ensure that the accuracy of the wax mold meets the standard, because the accuracy of the wax mold is directly related to the quality of the final casting.1. Accurate design and modeling3D modeling: Use advanced computer-aided design (CAD) software for accurate 3D modeling to ensure that the size and shape of the model meet the design requirements.Tolerance setting: Consider the manufacturing tolerance in the design stage, and set the dimensional tolerance reasonably to provide a basis for subsequent processing.2. High-quality mold materialsSelected mold steel: Use mold steel with high hardness and high wear resistance, such as P20, S136, etc. to ensure the life and replication accuracy of the mold.Surface treatment: Polish the mold to improve the surface finish and reduce the roughness of the wax mold surface.3. Precision mold manufacturing processCNC processing: Use a high-precision CNC machining center (CNC) to perform precision processing on the mold to ensure the dimensional accuracy and shape accuracy of the mold.Electrospark machining (EDM): For molds with complex shapes, EDM technology is used to achieve high-precision molding.4. Strict mold inspectionDimension measurement: Use a three-coordinate measuring machine (CMM) to accurately measure the size of the mold to ensure that it meets the design requirements.Appearance inspection: Check the surface finish of the mold and whether there are defects such as scratches and pores.5. Accurate wax mold making processTemperature control: When pouring wax liquid, strictly control the temperature of the wax liquid and the temperature of the mold to ensure the same shrinkage rate of the wax mold.Vacuum degassing: Vacuum degassing the wax liquid before pouring to remove bubbles and prevent pores from forming inside the wax mold.6. Demolding and trimming of wax moldsGentle demoulding: Use appropriate demoulding methods to avoid damage to the wax mold.Fine trimming: Fine trimming of the edges and details of the wax mold to ensure the accuracy of its size and shape.7. Wax mold quality inspectionDimension inspection: Use calipers, micrometers and other tools to measure the key dimensions of the wax mold to ensure that they are within the tolerance range.Appearance inspection: Check whether there are defects on the surface of the wax mold, such as cracks, depressions, etc.8. Process control and recordsStandardized operating procedures: Develop detailed operating instructions to ensure that each operation step is carried out in accordance with the standard.Recording and traceability: Record the production parameters and test data of each batch of wax molds in detail to facilitate quality traceability and problem analysis.Through the above measures, it can effectively ensure that the accuracy of the wax mold in the precision casting lost wax mold meets the standard, thereby providing high-quality prototypes for the subsequent casting process, and finally producing precision castings that meet the requirements.
