How to Buy Customized SMC for Compression Molding

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Sheet Molding Compound(SMC) is a widely used high-strength composite material, usually a multifunctional material used in compression molding, injection molding and other molding processes. Sheet Molding Compound formulations can be customized and adjusted to meet different ranges of applications and requirements. Compression molding of Sheet Molding Compound can process a variety of complex shapes in a fast cycle time and produce very little waste.The growing global demand for sheet molding compounds has prompted us to provide high-strength SMC composite materials for molding processes through advanced composite manufacturing processes.The Sheet Molding Compound material manufactured by HAMC covers many advantages and can meet the various needs of customers.

Advantages of buying HAMC's Sheet Molding Compound composites

There is no doubt that the demand for customized compression molding materials is increasing. As a leading Sheet Molding Compound composite material manufacturer in China, it has been supplying high-quality customized SMC composite materials to the world for compression and injection molding for decades. But is HAMC the best choice? Why do customers all over the world tend to choose us? The following can give you a better understanding of our services.

• HAMC has the strongest composite R&D team in China

  HAMC has decades of Sheet Molding Compound manufacturing experience and expertise, and has the strongest composite R&D team in China. We are a well-known name in the molding composite manufacturing industry. In the production of Sheet Molding Compound composite materials, we have accumulated valuable production experience, so that we have advanced manufacturing technology, so that customers can be completely assured of our manufacturing capabilities.

• Rigorous laboratory testing and quality control

  We pay great attention to our manufacturing process and the final product quality, because this affects the customer's business process. The same is true for the molded composite materials we supply. Our quality control team monitors, tests and analyzes every mat in the entire production line from incoming materials to finished products to ensure that we can provide high-quality and consistent quality Sheet Molding Compound composite materials.

First-class Sheet Molding Compound product manufacturing process

More and more manufacturers around the world use SMC composite materials, including industries such as automobiles, telecommunications, rapid transportation, and home appliances. We use advanced manufacturing technology in providing customers with molded composite materials. This makes our Sheet Molding Compound have a higher quality.

• Multi-cavity molding process

  Multi-cavity molding technology provides better efficiency. This technology allows multiple parts to be produced in one molding injection, the same design part or different design parts. It is now widely used in injection molding and compression molding processes. However, this technology has high requirements for mold manufacturing and molding technology, because it needs to maintain the consistency of each cavity. Huayuan (HAMC) has more than 26 years of multi-cavity molding experience and can provide an ideal solution that combines production capacity, efficiency and quality

• V acuum molding process

  Vacuum assisted molding technology is a new low-cost, high-quality molding process. In the molding process, the vacuum equipment evacuates the air and material in the cavity almost when the mold is closed. In this way, it can significantly reduce the risk of porosity and material shortages, achieve high product quality and reduce failure rates. It is very suitable for some products with high requirements on smoothness and high electrical requirements.

Customized Sheet Molding Compound for compression molding

The needs of each manufacturer are different. HAMC provides complete SMC composite material customization and solutions. How to make us your best choice as a supplier of composite materials? The following reasons tell you.

• Why choose HAMC's custom composite molding materials

  Our customized Sheet Molding Compound covers the different needs of various industries, and we will provide you with the most complete material formulations and solutions after you put forward your needs. Help you achieve better performance and cost-effectiveness.

• Composite material standard setter

  With years of experience in composite material manufacturing, HAMC has become a leader and standard-setter in composite material manufacturing in China. Therefore, you can rest assured of our capabilities. We can provide you with the best comprehensive services from SMC, BMC material formulations, product design support to mold design and manufacturing and final molded products. You can completely trust us and become your best cooperation partner.

  If you want to learn more, please visit our website china bmc mould.

A large number of customized SMC composite molding materials

We provide all customized services, which is exciting. We will give reasonable suggestions according to the needs of customers and customize composite molding materials in large quantities. We have everything you need to meet your needs.

• Complete Sheet Molding Compound automatic production line

  We have many years of experience in manufacturing composite molding materials, dozens of automated production lines, and more than 150 presses to meet various tonnages. We have all the equipment to meet your needs, and we can complete your needs with high quality in a shorter time.

• Communicate with professional design and manufacturing team

  You can send your needs directly to us or contact us directly, and our professional team will communicate with you to determine your complete needs. We have the most professional technical engineers, they will provide you with all conveniences. Talk to them and you can sublimate your business.

How to buy Sheet Molding Compound from HAMC

You can customize Sheet Molding Compound in large quantities from us. You only need to go through a short process to start your purchasing business immediately.

You only need to visit our website https://www.hamlite.com, and then send your needs to us or contact us, we can clearly understand your complete needs. At the same time, please send us your contact information and address so that we can get in touch with us to avoid accidents during the delivery process. Next to us, you can wait for your customized SMC composite molding material.

Definition

BMC is the acronym of Bulk Molding Compound in English and its Chinese name is ball molded plastic or polyester ball. BMC is a semi-dry molding / injection intermediate material for manufacturing glass fiber reinforced thermosetting products, which is pre-mixed into paste by unsaturated polyester resin, low shrinkage / low profile additive, initiator, internal release agent, mineral filler, etc., and then mixed evenly by adding thickener, colorant, etc., and put into a special kneading kettle, the short-cut glass fiber is fully kneaded / impregnated, and the special materials need to add thickening process. Finally, mass / bulk materials are formed.

A brief introduction of BMC

Development History and Application of BMC&#; BMC material in the early s, the low-shrinkage, non-shrinkage BMC, developed by BIP company in the United Kingdom and R&H company in the United States has greatly improved the dimensional stability, smoothness and appearance of polyester molded plastics. In the s, in applications requiring dimensional accuracy, high rigidity and heat resistance, such as office machine brackets, the main tone was still black. Because of the single color, the application range is narrow. In the mid-s, BMC, which can be freely colored, was developed to expand its scope of application. Because BMC has excellent electrical properties, mechanical properties, heat resistance, chemical corrosion resistance, and adapt to various molding processes, it can not only meet the performance requirements of various products, but also meet the requirements of appearance, so it is more and more recognized by the majority of users.

BMC application

&#;1&#;Electrical components
Low voltage category: isolation switch, air switch, switchboard, watt-hour meter shell, etc.; high voltage category: insulator, insulator cover, arc suppression cover, closed lead plate, ZW, ZN vacuum series.
&#;2&#;Auto parts
Headlight transmitter. Almost all of the lamp reflectors are made of BMC; car igniter, separation plate and decorative board, horn box, etc.; motor parts, air conditioning motor, motor shaft, coil frame, electric and steam parts. Household items such as microwave oven tableware, electric iron shell and other high voltage insulation.

The basic composition of BMC

1. Three Parts

From the perspective of proportion, BMC material is mainly composed of three parts. It is composed of matrix resin-unsaturated polyester resin and low shrinkage system, reinforced materials-mainly glass fiber, fillers-calcium carbonate, talc powder, aluminum hydroxide, porcelain clay and other components. Although the amount of these components accounts for a small proportion in the total composition, they play a very special role in the formulation system of BMC, which will have an important impact on the preparation process, product molding and final properties of BMC.

2. Low shrinkage and low profile additives (LSA, LPA)

Low shrinkage mechanism:Incompatible types-polyethylene, Polyvinyl chloride, etc., to improve the surface roughness of products; to pre-curing compatible classes-thermoplastic polyester, Polyvinyl acetate, Polymethyl methacrylate, etc., can achieve real zero shrinkage or even negative shrinkage.

3. BMC special glass fiber

The reinforced material of BMC is mainly short-cut glass fiber, which is an important guarantee of the mechanical properties of BMC. The length of short-cut fiber used in BMC is generally 6.4mm and 12.7mm. The content of BMC glass fiber depends on the strength requirements of the products, but too high or too low glass fiber content will increase the difficulty of production and molding, which is generally controlled between 50% and 55%.

Other auxiliaries

Initiator

The initiators used in BMC are mainly high temperature initiators which have a long storage life and function at high temperature, and some peroxides are commonly used, such as: BPO (Dibenzoyl Peroxide, TBPB (Tert-butyl Benzoate Peroxide) and so on. In order to improve the production efficiency and reduce the molding temperature of BMC, two different initiators can be used together, which is a new curing system. Although it may shorten the storage life of BMC, it can improve the curing speed and reduce the molding temperature to meet some special requirements of the products, such as too high temperature will damage the products.

Chemical thickener

When the resin is mixed with other raw materials to form a resin paste, it is necessary to maintain a low viscosity in order to infiltrate well with glass fiber. After the BMC production is completed, the viscosity of the sheet needs to increase rapidly to reach a very high viscosity. In other words, the viscosity should be &#;small first, then big, slow first and then fast&#;. Only in this way can the molding process of BMC be carried out, which requires the addition of thickeners.

Internal release agent

We know that in order to release the BMC molded products smoothly, a release agent must be added, the one coated on the surface of the mold is called the external release agent, and the one added to the resin paste is called the internal release agent. The mold internal release agents are some long-chain fatty acid salts, whose melting point is lower than the molding temperature, and will melt and migrate to the product surface before the material is heated and solidified, isolating the mold and the products to achieve the demoulding effect. The commonly used internal release agents are zinc stearate (ZnSt), calcium stearate (CaSt) and so on.

Coloring agent

Coloring agent refers to the colorant, which makes BMC have a variety of required colors, so that SMC products are more full of vitality, the pigments used by BMC are not ordinary colorants, because BMC is molded at high temperature, the choice of colorant is very important, ordinary colorants in high temperature, high pressure flow process will color separation, fading and other phenomena.

Special auxiliaries

In addition to the above main components in the BMC component, it is sometimes necessary to add some trace auxiliaries according to the special requirements of the product and process, such as anti-phase separation and viscosity reducer and so on.

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