BMC Eletric Motors Anti-aging Performance Is Very Good

⒈ general performance: BMC Eletric Motors (DMC) the proportion of the larger, between 1.3 to 2.1; product appearance bright, feel good, hard and heavy feeling; with fire will produce a lot of fumes, and styrene smell; some Varieties of BMC Eletric Motors (DMC) are flammable, but some varieties are very easy to burn, leaving inorganic substances after burning.

⒉ dimensional stability: BMC Eletric Motors (DMC) linear expansion coefficient (1.3 ~ 3.5) × 10-5K-1, smaller than the average thermoplastic, which makes BMC Eletric Motors (DMC) has a high dimensional stability and dimensional accuracy. The effect of temperature on the dimensional stability of BMC Eletric Motors (DMC) is very small, but the effect of humidity is more serious, BMC Eletric Motors will expand after moisture absorption. BMC Eletric Motors (DMC) linear expansion coefficient and steel, aluminum is very close, so it can be combined.

⒊ mechanical strength: BMC Eletric Motors (DMC) tensile, bending, impact strength and other properties than thermoplastic, creep resistance than thermoplastic.

⒋ water and solvent: BMC Eletric Motors (DMC) on water, ethanol, aliphatic hydrocarbons, grease, oil has good corrosion resistance, but not ketone, chlorinated hydrocarbons, aromatic hydrocarbons, acid and so on. BMC Eletric Motors (DMC) water absorption is low, soaking insulation after a day is still very good.

⒌ heat resistance: BMC Eletric Motors heat resistance than the general engineering plastics are good, heat distortion temperature HDT 200 ~ 280 ℃, long-term use at 130 ℃ temperature.

⒍ Aging resistance: BMC Eletric Motors anti-aging performance is very good, available in the room 15 to 20 years, outdoor exposure 10 years after its strength retention rate of 60% or more.

⒎ electrical performance: BMC Eletric Motors arc resistance of the most prominent, can reach about 190 seconds.

⒏ low odor: BMC Eletric Motors styrene crosslinking agent used in the curing will still have 0.1% residual, heating will be issued when the smell. Therefore, BMC Eletric Motors for food utensils (such as microwave utensils) should be used without residual styrene monomer type UP resin.

BMC Eletric Motors (DMC) material is the abbreviation of Bulk (Dough) molding compounds, that is, mass molding compound. Domestic often known as unsaturated polyester molding compound. The main raw material from the GF (chopped glass fiber), UP (unsaturated resin), MD (filler calcium carbonate) and a variety of additives by the full mixing of the mass-like prepreg. DMC material in the 20th century, 60 years ago in the West and the United Kingdom, first applied, and then in the 1970s and 80s in the United States and Japan, respectively, has been a greater development. BMC Eletric Motors cluster molding compound with excellent electrical properties, mechanical properties, heat resistance, chemical resistance, but also to adapt to a variety of molding process, you can meet the performance requirements of various products, so more and more users favorite.

Grouped molding compound (BMC Eletric Motors) is a thermosetting plastic in which various inert fillers, fiber reinforcements, catalysts, stabilizers and pigments are mixed to form an adhesive "greasy" composite material for compression molding or injection molding The The bulk molding compound (BMC Eletric Motors) is highly filled and reinforced by short fibers, with glass fiber reinforcements between 10% and 30% and typically between 1/32 and 1/2 inch (12.5 mm) in length.

According to the different final application areas, the preparation of composite materials can be precisely controlled size, good flame resistance and resistance to electric marks, with high dielectric strength, corrosion resistance and stain resistance, excellent mechanical properties, low shrinkage Color stability. The flow characteristics of the molded polymer (BMC Eletric Motors) are excellent in insulation and flame retardancy, and are ideal for a wide range of applications where details and dimensions are required. The material has 75 colors to choose from, can withstand powder coating or water-based paint.

Nature: chopped glass fiber and unsaturated polyester paste mixed with the group of prepreg. It is suitable for molding by molding, transfer molding, injection molding and so on. The obtained products have good mechanical properties, high dimensional stability, good surface finish, water resistance, oil resistance, excellent corrosion resistance and good heat resistance and electrical properties. Arc resistance can reach about 190s. According to the formula dubbed resin paste, the main component with the sheet molding compound, filler increased, generally without thickener, and then resin slurry and chopped glass fiber (length of about 3 ~ 25mm) fully mixed in the system. Mainly used in electrical appliances, motors, radio, instrumentation, machinery manufacturing, chemical equipment, construction, transportation, defense and other departments.

⒈ general performance: BMC Eletric Motors (DMC) the proportion of the larger, between 1.3 to 2.1; product appearance bright, feel good, hard and heavy feeling; with fire will produce a lot of fumes, and styrene smell; some Varieties of BMC Eletric Motors) flame retardant, but some varieties and easy to burn, burning after leaving inorganic substances.

⒉ dimensional stability: BMC Eletric Motors linear expansion coefficient is (1.3 ~ 3.5) × 10-5K-1, smaller than the average thermoplastic, which makes the BMC Eletric Motors has a high dimensional stability and dimensional accuracy. The effect of temperature on the dimensional stability of BMC Eletric Motors (DMC) is very small, but the effect of humidity is more serious, BMC Eletric Motors will expand after moisture absorption. BMC Eletric Motors linear expansion coefficient and steel, aluminum is very close, so it can be combined with.

⒊ mechanical strength: BMC Eletric Motors tensile, bending, impact strength and other properties higher than the thermoplastic, creep resistance than thermoplastic.

⒋ water and solvent: BMC Eletric Motors on water, ethanol, aliphatic hydrocarbons, grease, oil has good corrosion resistance, but not resistant to ketones, chlorinated hydrocarbons, aromatic hydrocarbons, acid and so on. BMC Eletric Motors (DMC) water absorption is low, soaking insulation after a day is still very good.

⒌ heat resistance: BMC Eletric Motors (DMC) heat resistance is better than the general engineering plastics, heat distortion temperature HDT 200 ~ 280 ℃, long-term use at 130 ℃ temperature.

⒍ Aging resistance: BMC Eletric Motors (DMC) anti-aging performance is very good, in the room available 15 to 20 years, outdoor exposure 10 years after its strength retention rate of 60% or more.

⒎ electrical properties: BMC Eletric Motors (DMC) arc resistance of the most prominent, can reach about 190 seconds.

⒏ low odor: BMC Eletric Motors (DMC) used in the styrene cross-linking agent will still have 0.1% after curing residues, heating will be issued odor. Therefore, BMC Eletric Motors (DMC) for food utensils (such as microwave utensils) should be used without residual styrene monomer type UP resin.

(1) Summary

The base resin, the low shrinkage agent, the curing agent, the filler, the release agent and the glass fiber are mixed into a colloid as a molding compound. Can be molded, injection manufacturing composite products due to non-heating stage, so the filler content can be higher than the SMC. Glass fiber length - generally 6 ~ 12mm, sometimes to meet the high mechanical properties used to 25mm; to meet the requirements of forming liquidity, with 3mm. Glass fiber content is usually 15% to 20%; for high-performance products, used 25%. BMC Eletric Motors glass fiber content below SMC, can add more filler, so the cost is low.

(2) raw materials

Resin unsaturated polyester resin, vinyl ester, phenolic, melamine and other resins.

Fiber BMC Eletric Motors with glass fiber twist roving.

Fill calcium carbonate, aluminum hydroxide and so on.

(3) advantages

① molding cycle is short, can be molded, can also be injected, suitable for mass production.

② can add a lot of filler, to meet the flame retardant, dimensional stability requirements, low cost.

③ complex products can be the overall shape, insert, holes, Taiwan, tendons, grooves, etc. can also be shaped.

④ Compared with the usual thermoplastics, the product heat resistance, insulation, elastic modulus and other properties to be higher.

⑤ on the skills of workers is not high, easy to achieve automation, saving labor.

⑥ product size is accurate.

⑦ good operating environment.

(4) shortcomings

① only suitable for the production of small size, strength requirements are not high (generally BMC Eletric Motors strength less than SMC 30% lower) products.

② injection machine prices higher.

(5) Typical products

Electrical components (front, reflector, rear door, speaker shell, etc.), meter housings, front panel, loudspeaker housing, etc., electrical components (insulator, switch 29, meter box, circuit breaker shell, terminal, all kinds of household or business mechanical and electrical products shell), auto parts , Audio equipment shell.

(6) BMC Eletric Motors molding method

BMC Eletric Motors injection molding machine is mainly for the BMC Eletric Motors pellet material, after the BMC Eletric Motors feeder forced into the BMC Eletric Motors cartridge, and then through the screw to the barrel before the transfer, and then injected into the mold cavity curing a process.

BMC Eletric Motors is a thermosetting material. Injection molding machine barrel temperature can not be too much, generally set to 60 degrees, easy to flow of materials can be.

BMC Eletric Motors injection molding machine is the production of thermosetting lumps of professional equipment, in the feeding part of a hydraulic system, the screw is expected when the ball into the material into the cylinder, BMC Eletric Motors injection molding machine is suitable for complex mold, with injection molding processing , Product efficiency, low labor intensity.

BMC Eletric Motors molding methods are compression molding, transfer molding, injection molding three, mainly to the main injection molding.

① compression molding method, see SMC molding method.

② transfer molding method. The device has a Pot type and an auxiliary piston type to assist the piston type.