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SMC Molding Manufacturer
Custom Solutions for Your Industry
SMC provides all needed injection molded components for your parts.All single use devices that we custom manufacture start with the technology of molding plastic. Learn more about our molding capabilities!
Contact us for custom BMC molding!
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Sheet molding compound(SMC), which is an unformed material mixture of resin FRP, can be used in compression molding as well as injection and transfer molding, making it a highly versatile material. Compression molding of SMC allows for tight dimensional control and creates a high-strength end-product that is flam resistant and boasts high color stability.
Our rich experience as a China SMC molding company includes production capabilities for many different industries parts.
Our focus is on production runs of 1000 to 100,000 units per order. We know every custom injection molding project is different, but every Yongchao Mold customer enjoys our key values:
●High quality custom plastic injection molds and custom parts with reliable on-time deliveries
●Outstanding attention to customer needs through advanced quality planning
●Fast quotes and delay free communication
●Friendly and knowledgeable customer service
Contact our experts for tailored SMC molding solutions today!
LET US SUPPLY A QUOTE FOR YOUR NEXT PROJECT.
Ready to start your SMC molding project? Contact Yongchao today for a free consultation and quote. Let us bring your designs to life with precision and expertise!
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What is SMC(sheet molding compound)?
SMC is a mixture of polymer resin, inert fillers (calcium carbonate, talc or wollastonite), fibre reinforcement, catalysts, pigments, stabilizers, release agents, and thickeners. The glass reinforcement is between 10% and 60%, and the fiber length is slightly longer than that of the bulk molding compounds (BMC). SMC production method assures full integration of fibres and resins. Manufacturing of SMC is a continuous in-line process. Generally: Sheet molding compound made of fibre impregnated with resin paste or chopped fibre mat covered with polyhexene film on both sides.
What Is SMC Mould?
SMC mould is high-strength, high hardness mould made of steel plates with polished surfaces to ensure the surface quality of the SMC moulded parts. The main feature of this mould is that it is made by using a compression process in order to compress the SMC material into the final product. SMC compression moulding usually use a hydraulic press machine, and the cavity and core are fixed to the top and bottom platens. When the material is placed into the open mould, the platens close, the mould gets heated, and then the press pressure forces the SMC material to flow all over the mould.Unlike SMC molding, which is used for lightweight composites, die casting mold solutions are ideal for high-strength metal parts.
Key Points of SMC Mould Design
●The color of compounds can be customized.
●In-mould coatings and a vacuum system are available to improve surface paintability, eliminating the need for primer.
●Parting line and the shear edge of mould design; Design of ribs and inserts;Mould surface roughness;Draft angle.
●The working temperature of SMC compression machine is usually 140 degrees to 160 degrees.
●Male and female moulds are made from high-quality steel except when temperature is less than 400 psi.
●SMC mould requires heated channels. The normal heating system is steam, oil, electricity or high-pressure water.
china smc injection moldingSMC Compression Moulding Processing
SMC compression moulding is an advanced composite material moulding method. SMC moulding process is continuous and can produce high strength, complex parts in a wide variety of sizes.
SMC moulding takes place in a device called “compression moulding press,” which is usually hydraulically powered. when the material charge is placed in the mould,the heated mould halves close and the pressure up to 2,000psi is applied.
Cycle time ranges from one to five minutes, depending on the size and thickness of the part. Components such as ribs, bosses and inserts can be formed by compression molding. Compression moulding can be used to create even more complex, detailed SMC parts with great accuracy.
Operational Procedure:
When we start to press SMC products, we first need to fix SMC tooling on the platen of the press, heat the SMC tooling, and then put the SMC material into the opening mold, setup SMC tooling molding process parameters such as pressure, curve time, opening&closing Speed, etc. Then, close the tooling. After the SMC tooling molded product is demolded, take out the product from SMC tooling.
Pigmentable for moulded-in color.
Trimming and finishing costs are minimal.
Good dimensional stability, thermal resistance,chemical resistance.
SMC precision moulds with a mirror finish are capable of meeting automotive-grade A-grade surfaces.
A wide variety of SMC material ratios enable parts to meet the needs of the use environment better.
Approximately 50% nominal weight reduction compared to metal and approximately 30% reduction compared to other thermoplastics.
Automotive Industry
BMC is widely used in manufacturing headlamp reflectors, battery covers, and engine components.
Electrical and Electronics
Ideal for circuit breakers, insulators, and switch housings due to its excellent insulation properties.
Medical Devices
SMC ensures precision and reliability for critical medical components.
Industrial Applications
SMC molding produces durable parts for industrial machinery and equipment.
Home Appliances
Used for durable, heat-resistant components in kitchen appliances and home devices.
With over 20 years of experience, our factory is equipped with advanced molding machines and quality control systems. We specialize in custom SMC solutions, ensuring precise design, high production efficiency, and strict quality standards.
Expert Equipment
Yongchao Corporation’s 9000㎡ facility houses a number of impressive compression molds. Among our molding equipment is a number of robotic flex cells which are used to preform secondary tasks and finishing, increasing product uniformity and decreasing lead-times.
Press sizes include: 600 ton, 350 ton, 300 ton,250 ,180 and 100 ton
- ● Superior Parts Arriving On-Schedule
- ● No-Cost Engineering Aid
- ● Fast Lead Times.
- ● Transparent Pricing. Contact our experts for tailored BMC molding solutions today!
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Yongchao Plastic Mold Co., Ltd, professional plastic injection moldings supplier, mainly devoted in plastic injection molding, plastic injection moulds,services. With plastic injection molding solution, Yongchao plastic injection mold has accumulated good reputations from our customers in different countries. plastic injection molding in transportations, sanitary series, electronic appliance, building, and sports and so on. We are equipped with a productive factory at your service which also satisfies your customized requirement.
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Frequently Asked Questions About SMC Molding
At Yongchao, we specialize in custom SMC molding services for a variety of applications. Our team is dedicated to providing exceptional quality and service to our customers, from concept to production. With years of experience in the industry, we have the expertise and resources necessary to produce high-quality SMC composite parts that meet your exact specifications.
☼ What is SMC used for?
SMC materials are usually formed by the hot-compression process. This moulding process can be used to make a variety of products, including automotive parts, aerospace components, medical devices, and sports equipments. It can be used in a variety of applications such as:
●Building materials
●electronic products
●Auto parts manufacturing
●Medical device manufacturing
●Automotive industry
●Household and commercial appliance manufacturing facilities;While SMC molding is suitable for large structural parts, BMC molding is ideal for high-precision, intricate components.
☼ 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 moulding process, which holds them together at the molecular level.
The process of making SMC fiberglass is similar to making any other types of fiberglass. The main difference is that the resins used in fiberglass contain more than one polymer molecule—usually styrene and acrylonitrile (SNAP), styrene-butadiene (SBR), or styrene ethylene butadiene (SEB).
☼ What Is an 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
☼ What Is Sheet Molding Compound?
Sheet molding compound (SMC) is a versatile and innovative composite material primarily used in the automotive industry to create lightweight, durable parts. This reinforced polyester material, often enhanced with carbon or glass fibers, is known for its exceptional strength-to-weight ratio, making it an ideal choice for applications where reducing mass without compromising structural integrity is crucial.
SMC can be molded into intricate shapes and sizes, providing manufacturers with design options to meet specific automotive needs. This adaptability lets SMC shine in various applications, from body panels to intricate interior components.
☼ Advantages of SMC Material
One of the advantages of SMC material is that it’s lightweight compared with other materials.
This has caused SMC to complement different metal components and be used for auto body parts. In fact, when SMC was introduced, it was seen as a revolution in parts manufacturing and shifted the industry from metals to polymer-based compounds.
Even though SMC is lightweight, it’s still a durable material that works to resist impact.
SMC can also be easily produced at a high volume. The sheet molding compound process is straightforward and provides a short production cycle. This makes it a cost-effective, reduced-waste choice for manufacturers.
☼ SMC Molding Temperature
The molding temperature depends on the curing system of the resin paste, the thickness of the product, the production efficiency and the complexity of the product structure. The molding temperature must ensure that the curing system initiates, the crosslinking reaction proceeds smoothly, and achieves complete curing.
Generally speaking, the molding temperature of thick products should be lower than that of thin-walled products, so as to prevent excessive heat accumulation in thick products. If the thickness of the product is 25-32mm, its molding temperature is 135-145°C. Thinner products can be molded at 171°C. The increase of the molding temperature can shorten the corresponding curing time; conversely, when the molding temperature decreases, the corresponding curing time needs to be extended. The molding temperature should be selected in a trade-off between the highest curing speed and the best molding conditions. It is generally believed that SMC molding temperature is between 120-155°C.
☼ SMC Molding Pressure: Factors & Guidelines
SMC molding pressure is determined by the structure, shape and size of the part and the thickness of the SMC. Simple shapes only need 25-30Mpa molding pressure; for complex shapes, the molding pressure can reach 140-210Mpa. the higher the degree of SMC thickening, the higher the required molding pressure.
☼ SMC Molding Curing Time
The curing time of SMC at the molding temperature (also called holding time) is related to its properties, curing system, molding temperature, product thickness and color.
The curing time is generally calculated as 40s/mm. For products thicker than 3mm, some people think that for every 4mm increase, the curing time increases by 1min.
☼ Advantages of SMC Finished Products:
●SMC parts exhibit precise sizing, shape, excellent surface finish, and remarkable part-to-part repeatability.
●In-mold coloring options are available.
●Minimal trimming and finishing costs.
●Good dimensional stability, heat resistance, and chemical resistance.
●Mirror-finished SMC precision molds meet automotive grade A surface requirements.
●Variable SMC material ratios allow parts to meet environmental needs effectively.
●Nominal weight reductions of approximately 50% compared to metals and 30% compared to other thermoplastics.