POM Characteristics: Density g / cm3 1.39 Water absorption% 0.2 continuous use temperature ℃ -50--110 tensile strength at yield MPa 63% tensile strain yield ultimate tensile strength of 10 MPa ultimate tensile strain of 31% Impact toughness Kj / m notch impact toughness Kj / m 6 Rockwell hardness MPa 135 MPa 85 Shore hardness bending strength modulus of elasticity MPa 2600 MPa softening temperature ℃ 150 Heat distortion temperature HDT ℃ 155 thermal linear expansion coefficient of thermal conductivity of 1.1 W / (m × K ) 031 0.35 coefficient of friction Product Name: POM English name: Polyoxymethylene POM POM material is the chemical name polyoxymethylene short, often referred to as its also known as POM match steel, Trane. It is a highly crystalline polymer, the main structural units (-CH2-O-) a crystalline thermoplastic resin, POM polyoxymethylene comprising formaldehyde formed by the molecular chains of the polymer constituting the homopolymerization of formaldehyde three mer - trioxane and ethylene oxide and the like Copolymer. It is a highly crystalline polymer with a smooth surface, shiny, water absorption dimensional stability, wear resistance, high strength, self-lubricating, good coloring power, oil, peroxide-resistant. Particle Image undefined undefined POM Japan 2 POM Japan 3 POM Characteristics: Density g / cm3 1.39 Water absorption% 0.2 continuous use temperature ℃ -50--110 tensile strength at yield MPa 63% tensile strain yield ultimate tensile strength of 10 MPa ultimate tensile Strain 31% Impact toughness Kj / m notched impact toughness Kj / m 6 Rockwell hardness MPa 135 MPa 85 Shore hardness bending strength modulus of elasticity MPa 2600 MPa softening temperature ℃ 150 Heat distortion temperature HDT ℃ 155 thermal linear expansion coefficient thermal conductivity of 1.1 W / (m × K) 031 molded friction coefficient 0.35 Notes 1 molding job safety and health 1.1 molding operation precautions decomposition: To avoid material decomposes, press within the following resin temperature and cylinder residence time setting. Suitable resin temperature:? 190 210 ℃ [Do not heated to above 250 ℃. ] Residence time in the barrel: resin temperature inside the cylinder residence time within 60 minutes or less 200 ℃ 210 ℃ 30 230 ℃ 10 or less if the molding interrupted, replaced the cylinder material, lower barrel temperatures. If overheating or suspected overheating, reduce the cylinder temperature, the overheated material replacement with the new material. In this case, the melt should be displaced into the water cooled, suppressing circulated gas. Also, please wear protective goggles and gloves when replacement Never put your hands or face close to the front end of the nozzle. Vinyl chloride and other chlorine-based material or material containing a halogen flame-retardant component will promote DURACON decomposition, so please do not put them together in the barrel. Gas: holding local or general ventilation is recommended job. Action: pellets spilled on the ground may make people fall, recommendations promptly removed. 1.2 Health Because formaldehyde can irritate the eyes and throat, people feel uncomfortable, long-term inhalation of the gas concentration exceeds a certain detrimental to the body. Therefore, maintaining partial or total ventilation is recommended job. Although the tolerance limits of formaldehyde varies, it can not be generalized, but its range is 0.05? 0.06ppm (according to World Health Organization). The maximum allowable concentration of about formaldehyde, recommended that Japan Society for Occupational Health value 8 hours 0.5 ppm; the United States is eight hours 0.75ppm. 1.3 molding machine start, stop and switch materials 1.3.1 is DURACON previous material as the heater is turned on, the temperature was raised to be a nozzle and barrel set temperature, after several repeated radio material, you can start molding. At this point, you want to check in advance of the nozzle portion has indeed melt open (can be checked through the nozzle "drooling"). Stop machine at DURACON shaped state, first stop material supply, has not material to the nozzle, and then cut off the heater. 1.3.2 previous material is not DURACON (a) can be directly used as the resin molding temperature DURACON DURACON replaced with the same, and good thermal stability, it can be used directly DURACON replacement. Such as: polyethylene, polypropylene, polystyrene, AS, etc., and other polyoxymethylene resins. (B) need to use polyethylene, polystyrene and other materials replaced after the first, and then won when steel replaced. When the molding temperature of the resin than wins high steel (such as: polycarbonate, nylon, PBT, PET, PPS, etc.), or vice versa, steel molding temperature lower than wins, and wins in the steel molding temperature may be decomposed material ( such as: polyvinyl chloride, etc.), the first raised to the molding temperature of a cylinder temperature of previous material, replaced with polyethylene, polystyrene, and the molding temperature was changed to seize the steel temperature, and then using DURACON replacement. (C) previous previous material is black and so dark color material is difficult to drain, when the cartridge is difficult to be cleaned, use natural color glass fiber reinforced resin replacement can be cleaned. Also, you can use commercially available cartridge cleaning agent. 1.3.3 from DURACON replaced with another resin from DURACON DURACON replacement with the same resin as the molding temperature, the resin can be used directly; from DURACON replacement with the DURACON molding resin temperature is not the same, first in Under DURACON molding temperature is replaced by polyethylene or polystyrene, then change the molding temperature is replaced with new resin. Instructions for use pictures 20140613145501 20140613145529 QQ QQ picture