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SMC Mould

What is SMC(sheet molding compound)?

SMC is a mixture of polymer resin, inert fillers, fiber reinforcement, catalysts, pigments, stabilizers, release agents, and thickeners. The glass reinforcement is between 10% and 60%, and the length is slightly longer than that of the bulk molding compound (BMC). SMC stands for sheet molding compound and consists of two parts: Thermoset Resins - These are rigid materials that cannot be melted or reformed once hardened. They are typically used in engineering applications where materials need to retain their shape under high stress. The most commonly used thermoset resins in SMC are epoxy (epichlorohydrin) polyurethane (PUR) and polyester (PET). Thermoplastics - These are flexible materials that can be heated and reformed many times before they start to break down. The most commonly used thermoplastic in SMC is polyphenylene sulfide (PPS). The main advantage of SMC is that it can be easily molded into any shape or size required. General situation: SMC is a kind of sheet molding material made of resin paste impregnated fiber or chopped fiber mat covered with polyhexene film on both sides. It also has many advantages: excellent machinability, lowest tooling cost, low unit cost.


What Is SMC Mould?

Compression mould of SMC usually use hydraulic press machine and the cavity and core are fixed to the top and bottom platens of the machine. Once the material is placed into the open mould, the machine closes, mould get heated, then the press pressure force material to flow all over the mould. In the above process, the material which placed into the open mould is normally SMC, BMC, GMT etc compound material. So we always refer this type of compression mould to SMC mould, BMC mould, GMT mould. There are certain difference between SMC, BMC and GMT material.

SMC mould

Key points of SMC mold design

SMC compression moulding

SMC compression moulding is an advanced composite material molding method. SMC moulding process is continuous, this produces high strength, complex parts in a wide variety of sizes. SMC moulding takes place in a device called a “compression moulding press,” which is usually hydraulically powered. SMC mould are mounted in a hydraulic press machine. The material charge is or placed in the mold; the heated mold halves are closed, and up to 2,000psi of pressure is applied. Cycle time ranges from one to five minutes, depending on part size and thickness. Features such as ribs, bosses and inserts can be compression molded in. Most moulding proccess require that both the loading of SMC into the mould and the unloading of the finished product must be manually carried out by a skilled operator. SMC conpression moulding can be used to create even complex, detailed SMC parts with great accuracy.

SMC compression moulding

The advantage of SMC molding parts is as follows:

Compression molded SMC parts are characterized by size and shape, two excellent finished surfaces, and outstanding part-to-part repeatability. Trimming and finishing costs are minimal.

SMC materials are usually formed by hot-compression process and products are integrated by compression mould at high temperature with oil, steam or electrical heating options. This molding process can be used to make a variety of products, including aerospace components, medical devices, and sports equipment. As a China SMC mould manufacturer, MDC has a long research in this field, and has successfully developed projects such as SMC bathtub mold, SMC shower tray mold , SMC wash basin mold and so on. You can use our expertise in SMC mold design, SMC mold make, and mold test to meet you need. Our customers are Mercedes Benz, Audi, GM, etc.

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People also ask

What is a SMC bathtub?

SMC bathtubs are made of a special type of glass-reinforced plastic called SMC (Sheet Molding Compound). The tub is one-piece, eliminating seams and allowing for more complex shapes.

SMC tubs tend to be more expensive than cast iron or acrylic, but they're also less likely to crack or chip. Therefore it is one of the most cost-effective options for bathroom remodeling projects and new builds.

As a professional SMC bathroom mold manufacturer in China, MDC has rich experience in SMC bathtub mold production.

What is SMC fiberglass?

SMC fiberglass is a glass reinforced with polymer resin, which makes it particularly strong and durable. It can be used in everything from aircraft parts to wind turbines, electronic equipment housings and more.

SMC consists of two layers of fiberglass cloth with epoxy adhesive sandwiched in between. The two layers are mechanically pressed together during the molding process, which holds them together at the molecular level.

The process of making SMC fiberglass is similar to making any other type of fiberglass. The main difference is that the resins used in SMC fiberglass contain more than one polymer molecule—usually styrene and acrylonitrile (SNAP), styrene butadiene (SBR), or styrene ethylene butadiene (SEB).

What is a SMC manufacturing process?

The SMC manufacturing process is a method of manufacturing solid material composites using resins derived from thermoplastic polymers. The process consists of three basic steps: 1. Resin preparation 2. Fabrication 3. Curing

This plastic can be formed into the desired shape using an injection or compression molding process.

What is SMC used for?

SMC is a very versatile material. It can be used in a variety of applications such as:

  • Building materials
  • electronic product
  • Auto parts manufacturing
  • Medical device manufacturing
  • Household and commercial appliance manufacturing

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