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Silicone injection machine, silicone molding machine, silicone injection molding machine. Gold supplier--Machinery for 17 years, focusing on silicone injection machine

by:FUHONG     2021-06-01
Overview of PA6 plastic: PA6 (polyamide 6 or nylon 6) is a translucent or opaque milky white crystalline polymer. It has good thermoplasticity, light weight, good toughness, chemical resistance and durability. Because of its good mechanical strength and rigidity, it is widely used in structural parts. Because of its good wear resistance, it is also used in the manufacture of bearings. PA6 plastic injection molding process conditions: Drying treatment: As PA6 easily absorbs moisture, special attention should be paid to the drying before processing. If the material is supplied in waterproof packaging, the container should be kept tightly closed. If the humidity is greater than 0.2%, it is recommended to dry it in hot air above 80°C for 16 hours. If the material has been exposed to the air for more than 8 hours, it is recommended to perform vacuum drying at 105°C for more than 8 hours. Melting temperature: 230-280℃, 250-280℃ for reinforced varieties. Mold temperature: 80~90℃. Mold temperature significantly affects crystallinity, which in turn affects the mechanical properties of plastic parts. Crystallinity is very important for structural parts, so it is recommended that the mold temperature be 80~90℃. For thin-walled, longer-flow plastic parts, it is also recommended to apply a higher mold temperature. Increasing the mold temperature can increase the strength and rigidity of the plastic part, but it reduces the toughness. If the wall thickness is greater than 3mm, it is recommended to use a low temperature mold of 20~40℃. For glass reinforced materials, the mold temperature should be greater than 80°C. Injection pressure: generally between 750-1250bar (depending on material and product design). Injection speed: high speed (slightly reduced for reinforced materials). Runner and gate: Since the solidification time of PA6 is very short, the location of the gate is very important. The gate aperture should not be less than 0.5*t (t is the thickness of the plastic part). If a hot runner is used, the gate size should be smaller than that of a conventional runner, because the hot runner can prevent the material from solidifying prematurely. If a submerged gate is used, the minimum diameter of the gate should be 0.75mm. The chemical and physical properties of PA6 plastic: The chemical and physical properties of PA6 are very similar to those of PA66, however, it has a lower melting point and a wide process temperature range. Its impact resistance and resistance to solubility are better than PA66, but it is also more hygroscopic. In order to improve the mechanical properties of PA6, various modifiers are often added. Glass is the most common additive. Sometimes synthetic rubbers such as EPDM and SBR are added to improve impact resistance. For products without additives, the shrinkage of PA6 is between 1% and 1.5%. Adding glass fiber additives can reduce the shrinkage to 0.3% (but it is slightly higher in the direction perpendicular to the process). The shrinkage of molding assembly is mainly affected by the crystallinity and moisture absorption of the material. The actual shrinkage rate is also a function of the plastic part design, wall thickness and other process parameters. Features of PA6 plastic: ①. Combination of strength and durability, excellent rigidity and heat resistance; ②. Optimized component design, excellent coloring performance, perfect surface appearance, can be applied to complex structure molding, and help design and development Develop new molding products; ③. Good processability, excellent fluidity and thermal stability make the material processing conditions more relaxed, making the injection molded parts miniaturized; ④. Extremely high thermal stability, can be as high as 270 degrees There is no tin in the wave soldering tin; ⑤. Constant electrical properties in a wide range of temperature and frequency to ensure 100% safe use of equipment. Typical application range of PA6 plastic: Vertical injection molding machine is widely used in the industrial production of injection molding process to manufacture bearings, circular gears, cams, bevel gears, various rollers, pulleys, pump impellers, fan blades, worm gears, propellers, screws, Nuts, gaskets, high-pressure sealing rings, oil-resistant gaskets, oil-resistant containers, shells, hoses, cable sheaths, shear pulley sleeves, bullhead planer sliders, electromagnetic distribution valve seats, cold equipment, gaskets, Bearing cages, various oil pipelines, pistons, ropes, transmission belts on automobiles and tractors, zero-fogging materials for textile machinery industrial equipment, daily necessities and packaging films, etc. Push to read: (1) Vertical injection molding machine (2) Vertical injection molding machine brand.
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