• Common injection molding product defects and solutions-3 Nov 25, 2019
    Short shot-1 the reason: 1. The injection pressure is too low. 2. The injection speed is too slow. 3. Injection time is too short. 4. The pressure is too small. 5. The pressure keeping time is too short. 6. The pressure holding switch position is too early. 7. The mold is poorly ventilated. 8. The mold surface temperature is too low. 9. The melt temperature is too low. 10. Material viscosity is to...
  • Short shot Nov 29, 2019
    During last articl, We have talked about the factor caused short shot. Today, we are going to talk how to improve it. The improvements are as below: 1. Modify or improve venting structure; 2. Modify or improve gate system; 3. Increase section thickness; 4. Design a suitable cold well; 5. Increase injection speed appropriately; 6. Change the suitable injection machine; 7. Change a large nozzle; 8. ...
  •  Guangdong Shenzhen Dongguan Mold Processing Factory Services
    Guangdong Shenzhen Dongguan Mold Processing Factory Services Nov 29, 2019
    The mold in the picture is an extrusion molding mold. It is a mold processed by Russia customer at Green Vitality except for the injection mold. The product is an LED light bar mold shell mold. The full processing cycle is 15 working days, and the next step is to customize the wooden box for export to Russia. In addition to injection molds, Green Vitality also has a lot of mold brother factories i...
  • The process for injection molding
    The process for injection molding Dec 13, 2019
    The Last Shot Stage → Closed mold → Filling → Holding Pressure →Plastic Melting → Part Cooling → Mold Opening → Demolding → The Next Shot Stage During the filling and holding stage, the cavity pressure rises with time. After filling the cavity, the pressure will remain in a relatively static state to supplement the insufficient amount of plastic due to shrinkage. This pressure can prevent the resu...
  • The Concept and Importance of Hot Runners System
    The Concept and Importance of Hot Runners System Dec 13, 2019
    Hot runners are already indispensable in injection molding production. For plastic processors, choosing the hot runner that is suitable for product molding and mastering the correct use of the hot runner is the key to benefit from the hot runner. Hot runner (HRS) is also called hot gate, which turns the solidified nozzle into a molten nozzle, and its composition is relatively simple, mainly includ...
  • gas assisted injection mold
    gas assisted injection mold Dec 13, 2019
    Gas Assisted Molding refers to an injection molding technology in which inert high-pressure nitrogen is injected at the appropriate time (75%~99.9%) when the plastic is filled into the mold cavity. The principle of gas assisted injection molding includes:  1.Metrological management  2.Press the high pressure nitrogen gas directly into the mould cavity through gas assisted controller. 3.T...
  • Uneven color of injection molded parts Dec 13, 2019
    The color unevenness is that the color of the product surface is different, and it can appear near and far from the material, and occasionally in the sharp-edged material flow area. Reason: 1. Color unevenness is caused by uneven pigment distribution, especially when color is added by color masterbatch, toner, or liquid colorant. At temperatures below the recommended processing temperature, the ma...
  • Common injection molding product defects and solutions-3 Dec 13, 2019
    Short shot-2 Solution: 1.Restart the machine after the injection is interrupted, the previous pieces may be scrapped. 2.Improve injection and shrink pressure. 3.Improve injection volume and injection speed. (Injection pressure must be sufficient) 4.Increase the mold temperature. 5.Increase the material temperature. 6.Clean the air-removal system of the mold. 7.Check if the pad is sufficient. 8.Adj...
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A total of 28 pages

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