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Bending deformation of injection molded parts is what reason?
by：CSSSLD
2021-01-23
Teda South Asia plastic company is engaged in all kinds of plastic mould design, mould making and plastic injection, oil injection, pad printing and other processing services.
Manufacture of mold types are widely, including all kinds of household electrical appliances, week of computer products, communication products, electric tools and CD, DVD, MP3, MP4, etc. , can make quick sample mould, double color molding mold.
Can both big small and medium-sized mold.
The biggest mould size 2 m * 1 m, the heaviest weight up to 8 tons.
Factory now has large-scale imports of CNC machines and other precision processing machinery and equipment, using advanced graphics software design and the processing system as a technical support.
Now the mold the monthly output can reach 50 sets.
injection mold exhaust bad generally appear what problem
defect 1, go with 2, 3 products have bubbles, air trapping 4, weld line significantly below is analysis the reason of the injection mold venting is not good, will be the quality of plastic parts from many aspects, such as a series of harm. Mainly as follows:
1) In injection molding process, the melt will replace the gas cavity, if gas discharge not in time, will cause the melt filling difficult, due to insufficient injection quantity rather than full of cavity.
2) Ruled out of the gas will be formed in the cavity pressure, and infiltration under a certain degree of compression plastic inside, cause porosity, empty, loose organization, and other defects.
3) Because gas is highly compressed, the cavity temperature has risen sharply, resulting in the melt around decomposition, burning, partial carbonation and plastic burning phenomenon. It is mainly appeared at the confluence of two strands of the melt, * Angle and the gate of flange.
4) Poor gas purging, into the cavity of the melt velocity is different, so easy to flow marks and weld line formation, and the mechanical properties of plastic.
5) Due to the blocking of the gas in the cavity, can reduce mold filling speed, impact molding cycle, reduce the production efficiency.
injection mold exhaust bad generally appear what problem
defect 1, go with 2, 3 products have bubbles, air trapping 4, weld line significantly below is analysis the reason of the injection mold venting is not good, will be the quality of plastic parts from many aspects, such as a series of harm. Mainly as follows:
1) In injection molding process, the melt will replace the gas cavity, if gas discharge not in time, will cause the melt filling difficult, due to insufficient injection quantity rather than full of cavity.
2) Ruled out of the gas will be formed in the cavity pressure, and infiltration under a certain degree of compression plastic inside, cause porosity, empty, loose organization, and other defects.
3) Because gas is highly compressed, the cavity temperature has risen sharply, resulting in the melt around decomposition, burning, partial carbonation and plastic burning phenomenon. It is mainly appeared at the confluence of two strands of the melt, * Angle and the gate of flange.
4) Poor gas purging, into the cavity of the melt velocity is different, so easy to flow marks and weld line formation, and the mechanical properties of plastic.
5) Due to the blocking of the gas in the cavity, can reduce mold filling speed, impact molding cycle, reduce the production efficiency.
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