In today's rapidly developing technology, facing the arduous task of mold production innovation, investment casting technology has also been constantly improving and developing, from ordinary paraffin rosin low-temperature mold materials to resin mold materials, which is a great progress. With the increasing development of the polymer industry, the opportunity for additives to meet the requirements of high-quality mold materials is increasing. At present, the market is characterized by the coexistence of traditional casting mold materials and advanced casting mold materials. I believe that in the near future, mold materials that affect precision castings will be eliminated from the market, and the silica sol precision casting market will face a new round of challenges.
Silicon sol precision casting enterprises should start with mold management and conduct comprehensive audits of casting production management. The material, accuracy, lifespan, and delivery time of molds are crucial to the quality of castings. Mold management mainly includes:
1. The technical department is responsible for mold design and all liaison work with mold manufacturers. Strengthen the selection, evaluation, and confirmation of mold factories. Choose professional silica sol precision casting mold manufacturers with advanced technology and equipment as much as possible, and strengthen mold inspection management.
2. The Quality Control Department is responsible for inspecting new molds, wax molds, and castings, calculating shrinkage rates, and determining whether the molds are qualified.
3. The production department is responsible for the daily management of silica sol precision casting molds, such as mold registration, daily maintenance, storage, protection, evaluation, and handling of entry and exit procedures, and strictly strengthening the quality control of raw materials. The quality of raw materials largely determines the quality of castings, and selecting high-quality materials does not necessarily increase the production cost of castings.
In the process of silica sol precision casting, quality control is emphasized. The complexity of silica sol precision casting technology determines that each production process must be equipped with a dedicated inspector. Due to the fact that the thermal expansion coefficient of the mold material is much greater than that of the shell in the silica sol precision casting process, excessive dewaxing time can lead to the shell expansion of the mold material. Therefore, after dewaxing, the inspector needs to check the quality of the shell, whether the wax inside the shell is removed, and whether the shell has cracks or expansion.
In order to ensure that the quality of silica sol precision casting castings meets the technical conditions for delivery and acceptance, all inspections must be carried out in accordance with the casting drawings, investment casting, and the technical standards submitted by the supply and demand parties in the contract. Inspection mainly includes appearance quality inspection, internal quality inspection, and other quality inspections.
