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24
2017-5
 
What is injection molding, this one let you get through!

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 Injection molding is the plastic material in the injection molding machine barrel through the external heating and the rotation of the screw produced by the shear heat of the resin material into plastic melt, by applying a certain pressure, the melt injection to a certain shape The cavity produced by the cooling after the stereotypes of the items produced for injection molding.
Foreigner this video basically let you understand

Single parting
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Injection molding process can be divided into the following six steps: mold, injection, holding pressure, cooling, mold, product removal;
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1. Rubber injection:
Rubber injection molding is a method of producing a compound directly from the barrel into the model vulcanization. The advantages of rubber injection is: Although the intermittent operation, but the molding cycle is short, high production efficiency to cancel the embryo preparation process, labor intensity is small, excellent product quality.
Double parting
2. Plastic injection molding:
Plastic injection molding is a method of plastic products, the use of pressure into the plastic plastic molding mold, cooling molding to get a variety of plastic parts. There is a special injection molding machine for injection molding. The most commonly used plastic is polystyrene.
With active inserts
3. Molding:
Lateral typing
The resulting shape is often the final product, and no further processing is required before it is installed or used as a final product. Many details, such as raised, ribs, threads, can be molded in a one-step injection molding process.
Shrinkage, shrinkage, shrinkage, rupture, size tolerance and other common injection molding problem description, cause analysis, as well as in the mold design, molding Process control, product design and plastic materials and other aspects of the solution.
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Analysis on the Causes of Imperfections and Uncompent Surfaces around Injection Molding Parts and the Countermeasures
Analysis on the Causes of the Batching (Burr) and the Countermeasures
Analysis of the Causes of Shrinkage and Shrinkage (Vacuum Bubble) on the Surface of Injection Molding Parts and the Countermeasures
● Crayon (flower, water), charred, gas pattern analysis and countermeasures
Analysis on the causes of water ripple and rhyolite (flow marks) on the surface of injection molded parts and the countermeasures
● Analysis and countermeasures of watermarking (splicing marks) and spray pattern (serpentine) on the surface of injection molded parts
Analysis on the Causes of Surface Crack (Crack) and Top White (Top Burst) of Injection Molding Parts and the Countermeasures
● Analysis of the surface color difference, poor gloss, color mixing, black bars and black spots of injection molded parts and the countermeasures
Analysis on the causes of warping deformation and internal stress cracking of injection molded parts and the countermeasures
Analysis on the Causes of the Size Deviation of Injection Molding Parts and the Countermeasures
● Analysis of the reasons for the sticking mold, dragging (pulling) and dragging of injection molded parts and solving the countermeasures
● Analysis of the lack of transparency, insufficient strength (brittle fracture) of injection molded parts and the countermeasures
Analysis on the Causes of Cold Spot and Skinning of Injection Molding Parts and the Countermeasures
Analysis of the Causes of Bad Metal Insert in Injection Molding and the Countermeasures
● nozzle salivation (runny nose), leakage glue, nozzle drawing, nozzle blockage, mold difficult reasons analysis and improvement measures
● CAE mold flow analysis technology to quickly and effectively solve the problem of injection molding site
Hot runner
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Lateral classification - interference