2013年8月8日
树脂铸造是一种塑料铸造过程，其中液体合成树脂被填充并允许变硬。传统上，此过程主要用于小规模生产，例如工业原型和牙科产品。业余爱好者和制造商也可以使用它来创建可收藏的玩具，比例模型，物体模型，雕像和小型珠宝生产。铸造树脂相对快速固化，非常易于使用。
各种类型的复合材料的发展增加了对树脂铸造的需求。轻巧的复合材料广泛用于海洋，汽车，航空航天部门等。
The simplest process for resin casting is gravity casting. In this process, the resin is poured into the mold and pulled down into all the parts by gravity. When the resin is mixed, air bubbles may be created in the liquid, this can be removed in a vacuum chamber. The casting can also be performed in a vacuum chamber especially when using open molds, to extract the bubbles. It can also be performed in a pressure pot to reduce the size of the air bubbles to the point where they are not visible. Finally, pressure and/or centrifugal force can be used to push the liquid resin into the fine details of the mold.
Today casting resins are being used to create water clear plastics and water-based acrylic casting materials with mechanical properties matching those of engineering plastics due to the advancements in cast plastic chemistry. Vacuum degassing and even pressure casting can be used to create bubble free castings as well.
Types of Casting Resins for Composite Manufacturing
市场上有几种类型的铸造树脂：
- Polyurethane casting resins- 与硅胶橡胶模具一起使用，以生产原始零件或快速原型的精确塑料铸件。这些树脂具有出色的热稳定性，超低粘度，耐热性高，并且可以轻松地颜料以获得多种颜色。他们能够复制非常独特的表面细节。它相对便宜，即使在较大的铸件中也可以有效地使用成本。这些也非常可加工，很容易删除。
- 清水聚氨酯铸造树脂– These are high performance, ultra-clear casting resin that can be used in clear casting, rapid prototyping, and object embedding/encapsulation. They are polishable to a high gloss and are UV stable.
- 净水聚酯铸造树脂– These are suitable for object embedding, clear sculpture casting, jewellery making and set design.
- Aluminium-filled epoxy casting resins– These are designed for high temperature tooling applications such as vacuum forming tools. They are known for their very hard-wearing property.
复合铸造树脂材料欧洲杯足球竞彩
- Acrylic – There are several types of acrylic resins. For example, the methyl methacrylate type of synthetic resin is used to manufacture acrylic glass such as Plexiglass, which is more of a plastic polymer rather than glass. These resins are ideal for embedding objects.
- Epoxy - Epoxy resins have a lower viscosity than polyurethane resins. These are polyether resins containing more than one epoxy group. They are capable of being converted into the thermoset form.
- 不饱和的聚酯 - 不饱和聚酯树脂是通过邻苯二甲酸，甲基酸酐，同磷酸和甘油（丙烯，丙烯，二乙二醇，单乙二醇，单乙二醇）等酸之间的冷凝反应来制造的。这些是用于增强塑料应用的通用树脂。
Applications in Composite Materials
以下是复合铸造树脂的主要应用领域：
- Artificial limbs and other related applications
- UV stabilised specially modified resin for translucent sheets
- 用于电绝缘应用的窒息和变压器的罐装盆栽
- Pultrusion applications
- 真空形成和其他重复的压制/成型应用
- 真空形成男性工具
- Platen press tools
- 车库套件
- Applications in which extreme clarity and absence of color are required
- Decorative and artistic applications.
来源和进一步阅读