Artificial stone can be manufactured using three primary molding techniques: casting, sheet forming, and bulk block shaping. Each method has its own advantages and is suited for different types of applications.
1. Casting Molding is one of the oldest methods used in artificial stone production. It involves pouring the mixed resin material directly into a mold and allowing it to cure. This technique is not only used for making flat sheets but also for creating complex shapes such as bathroom fixtures, pipes, and grooves. The success of this process heavily depends on the quality of the mold and the release agent used. Molds can be made from materials like Sichuan FRP, stainless steel, or resin panels. Since unsaturated polyester resin has strong adhesion properties, choosing a high-quality release agent is crucial. An effective release agent should be lightweight, neutral in pH, stable, have low affinity with polyester resin, and not damage the surface finish after use. It should also avoid leaving brush or spray marks, be water-soluble, odorless, non-toxic, and cost-effective. Some common options include release wax derived from palm oil or PVAI-based agents that are easy to remove during the finishing stage.
2. Sheet Pressing is typically used for producing medium to small-sized products. In this method, the mixed material is pressed into a 4" x 1" sheet, which is then solidified and polished to achieve the desired surface finish. This technique is efficient for mass production and ensures uniform thickness and quality across the product.
3. Bulk Block Molding involves mixing the resin and aggregate into a thick cube or rectangular block, which is then allowed to cure. After curing, the block is cut into smaller pieces, followed by fine grinding and polishing. This method is ideal for large-scale production and allows for greater flexibility in size and shape customization.
Each of these molding techniques offers unique benefits depending on the intended use of the artificial stone. Understanding the differences between them helps in selecting the most suitable method for specific projects and applications.
Curing Agent for One Component Polyurethane System
Curing agent for one component polyurethane system is aliphatic polyisocyanate based on hexomthylene diisocyanate.
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