Improper Control Of Molding Conditions If the injection pressure is too low, the injection and holding times are too short, the injection rate is too slow, the material and mold temperatures are too high, the part is not cooled enough, the temperature during demolding is too high, the insert temperature is too low, or there […]
Why Do Injection Molded Parts Have Dents And Sink Marks Read More »
Fault analysis and troubleshooting methods Melt fracture: After the melt is injected into the cavity, a thin shell is first formed on the wall of the mold cavity. When this shell is squeezed by the subsequent melt during the filling process, it will cause melt fracture. Once a very thin shell is torn or moved,
How to improve the turbidity and streaks near the gate? Read More »
Mold failure Since the surface of the plastic part is a reproduction of the mold cavity surface, if there are surface defects such as scars, corrosion, micropores on the surface of the mold, it will be reflected on the surface of the plastic part to cause gloss poor. If there is oily, moisture on the
Analysis And Troubleshooting Methods For Surface Gloss Of Injection Molded Parts Read More »
When designing each injection molding product, we must first determine its mold opening direction and parting line to ensure that the core pulling slider mechanism is minimized and the influence of the parting line on the appearance is eliminated. 1. After the mold opening direction is determined, the product’s reinforcement ribs, buckles, protrusions and other
Several Basic Points To Be Mastered In Injection Mold Design Read More »
Plastic varieties: During the molding process of thermoplastics, there are volume changes caused by crystallization, strong internal stress, large residual stress frozen in the plastic parts, strong molecular orientation and other factors. Therefore, compared with thermosetting plastics, their shrinkage rate is larger, the shrinkage rate range is wider, and the directionality is obvious. In addition,
Factors Affecting Injection Molding Process Read More »
Black spots and impurities are important factors that cause scrap rates in normal production processes. They mainly affect the appearance of products and lead to product scrapping. Impurities and most black spots are foreign substances and have nothing to do with the raw materials themselves, while a small number of impurities and black spots are
Causes And Solutions For Black Spots And Impurities In Injection Molded Products! Read More »
1. Turn on the main power switch of the machine tool, check whether the equipment is leaking electricity, preheat the barrel and mold according to the set process temperature requirements, and keep the barrel temperature for more than 20 minutes when it reaches the process temperature to ensure that the temperature of all parts of
The injection molding machine screw works for a long time under high temperature, high pressure, high mechanical torque and high friction environment. The first few factors are required by the process conditions, and the loss caused by friction is inevitable. Generally, the injection molding machine screw is subjected to surface nitriding treatment to improve the
If the plastic part shrinks unevenly, it often causes uneven distribution of internal stress. If this stress exceeds the rigidity of the plastic part, it will cause warping and deformation of the plastic part, affecting the dimensional stability of the plastic part. 1, What is warping for injection mold parts? When internal stress (due to
Analysis of the reasons for uneven shrinkage of injection molded parts Read More »
Start mold closing clamping 1.Starting mold clamping pressure: The initial setting value is 25. When the pressure is too low and the speed is too slow, you can try to increase the speed. If the pressure is too low and the speed cannot be increased to the required level, try adding +5 each time. Note
Injection Molding Machine Mold Clamping Parameter Setting Read More »
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