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ABS-BM662 Plastic Raw Material

— BM662, LG, ABS
Product Category: Rubber Raw Materials/n.e.s.
Sales Method: Export, Manufacture, Wholesale, Service, Retail
Payment Term: T/T
Min. Order Unit Price
Contact Info

Mr.Robert

Address: China (mainland) Guangdong Dongguan,NO. 843 Suda RD, DaJingJiu Plastic Market ChangPing Town GD. China

Product Detail

Product Attribute:

  • South Korea More >
  • BM662 ABS LG
  • LG
  • 08/22/2013
  • 08/23/2013

Additional Info.:

  • BAG

Product Content Description:

The most influential factor in injection molding is temperature. Temperature conditions include
the temperature of the cylinder (setting and actual), the die temperature, the coolant
temperature, the drying temperature, and the ambient temperature. The most important of
these are the temperature of the melt inside the cylinder and the temperature of the
die. The heat required for melting the resin in injection molding comes from the cylinder
heater (20%-30%) and the viscous heat (70%-80%) generated by the abrasion of the polymer
due to the turning screw. Particularly, you have be careful of the overheating due to local
viscous heat generated when the temperature setting is low and the RPM is high. The
temperature of the oil for the operation of the machine poses no trouble in general, but a
change in temperature can cause a change in pressure and also affects the life of the
machine.
1) The drying temperature must be approximately 10¡É lower than the heat deformation
temperature (HDT). (Maximum temperature at which drying is possible without caking)
2) Refer to the processing temperature for individual resins.
3) If left in high temperature too long, reins tend to be carbonized. As to the machine to
machine temperature differences, rely on your experience.
4) In the case of highly fluid resins, lower the temperature a little further.
5) Factors affecting the temperature of resins fed into the cavity include injection speed,
injection pressure, back pressure, RPM, stay time, type and length of the runner gate,
and length and size of the nozzle.
6) The temperature of the molten resin can be measured by purging. It becomes
approximately 20-30¡É higher than the setting.
7) The temperature of the die should be between 40 and 60¡É. If the coolant is supplied
directly from the cooling tower, the temperature varies much by season, and thus you'd
better use a thermostat.
2. Injection pressure and speed
1) Injection pressure and speed are interconnected. It is desirable to use lowest possible
pressure and highest possible speed.
2) The injection speed and pressure can range between 30% and 50% of the
maximum capacity, and the desirable optimal level will be between 40% and 70%...
3) Since there is a great deal of variation to injection conditions depending on injector
properties (capacity and maker) and die structure (gate structure, product structure,
and skin thickness), care should be taken from the product development stage to ensure
good product structure and die) structure.
4) The injection speed profile should set appropriately to ensure uniform speed of the melt
flow inside the die.
5) To prevent defects such as cracks, burrs and flashes due to residual stress, it is
desirable to reduce the injection speed to below 70-80% of the initial speed at 90%

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