1. Composite materials refer to materials with special properties that are composed of two or more different physical properties or different chemical substances through compounding to form multi-phase, three-dimensional combination and obvious interface between each phase; It is mainly composed of reinforcing materials and matrix materials. Its most important feature is that the performance of the composite material is better than that of the single material that makes up the composite.
2. The thermal expansion coefficient of steel material can reach 2 10-6, which can be matched with the linear expansion coefficient of composite materials, but the processing cost of Yin steel mold is higher. Expansion or shrinkage mold The expansion mold is mainly made of elastic material, and the arbitrary shaping characteristics of elastic material are very convenient for the molding of complex profiles or closed cavity structures.
3. Now, molds for composite molding are also called tools and can be made from any material. For low-temperature cured parts or prototype parts, where dimensional accuracy is not strictly controlled, molds are typically made of fiberglass, high-density foam, machinable epoxy sheets, or even clay or wood.
4. Spray molding method description: a molding process in which chopped fiber reinforced materials and resin systems are sprayed in the mold at the same time, and then solidified into thermosetting composite products under atmospheric pressure.
5. Materials and processes: composite material tooling composite parts are formed in molds, also known as tools. Tools can be made from almost any material.
The material type, shape, and complexity depend on the section and length of the production run. Here's a short summary of the issues involved in choosing and making tools.
6. Shell mold casting, also known as shell molding, is the process of creating and using a resin mold composed of thin-walled parts. This process is often used to manufacture small and medium-sized metal parts. It's perfect for projects that require precision and consistent accuracy. To create the shell shape, silica sand is coated with resin, which hardens into a solid when heated.
1. Blanking, punching composite mold; cutting, punching composite mold, etc.; Forming composite molds such as bending composite molds, composite extrusion dies, etc.; Blanking and forming composite dies such as blanking, drawing composite dies; punching, flanging composite die; Drawing and trimming composite molds; Blanking, drawing, punching, flanging composite die, etc.
2. There are three main types of composite molds: male molds, negative molds and compression molds (such as lightweight RTM FRP molds), according to different production conditions, in order to meet the choice of the maximum interests of customers.
3. Composite materials gatheredComposites There are a variety of raw materials for composite materials, including resins, fibers, and core materials, and each material has its own unique properties such as strength, stiffness, toughness, and thermal stability, and the cost and yield are also different.
4. Mold structure and classification characteristics of composite material compression molding Open mold As shown in Figure 2, the mold is characterized by no feeding room. This type of mold has simple structure, low cost, durability, easy demoulding, and easy installation of inserts. Closed mold is shown in Figure 2.
5. Method description: a molding process in which chopped fiber reinforced materials and resin systems are sprayed in the mold at the same time, and then cured into thermosetting composite products under atmospheric pressure.
6. The auxiliary materials in the contact molding process mainly refer to two categories: fillers and pigments, while curing agents, diluents, toughening agents, etc., belong to the resin matrix system.
Molds & Release Agents Molds Molds are the main equipment in various contact molding processes. The quality of the mold directly affects the quality and cost of the product, and must be carefully designed and manufactured.