• What are the procedures for texture? Jan 16, 2020
    Before, We have talked about the mould texture. There are 7 procedures for mould texture as below: 1.Cleaning the cavity surface 2.Covering the cavity surface which no need to be texture,or painting antiseptic paint on it 3.Drying the antiseptic paint 4.Using degrease cotton to clear the cavity surface which need to be texture, make sure that there's no any impurities and filth to effect texture. ...
  • Common injection molding product defects and solutions-6 Jan 17, 2020
    Burr the reason: 1.Insufficient clamping force. 2.The injection pressure is too high. 3.Injection speed is too fast. 4.The holding pressure switch is too late. 5.Insufficient mold support. 6.Defect of mold parting surface. 7.The melt temperature is too high. 8.Low viscosity. Solution: 1.Reduce filling speed or holding pressure. 2.Improve the clamping force. 3. Change the position or method of hold...
  • Two-color mold design and injection tips
    Two-color mold design and injection tips Mar 20, 2020
    1. The water circiuts of the cavities and cores is designed as full as possible and balanced. 2. After the cavity rotates 180 ° from the center, it must match the core. 3. Usually, injecting the hard rubber part first, and then the soft rubber part, because soft rubber is easy to deform. 4. The nozzle of the three-plate mold should preferably be designed to automatically demolding. Special attenti...
  • Tips for injection molding of nylon cable ties
    Tips for injection molding of nylon cable ties Apr 10, 2020
    1. Pay attention to mold temperature If the lower temperature of the heat-resistant and abrasion-resistant nylon cable ties in the production, the faster the material cooling rate in the mold cavity, so that it can greatly shorten the take-out time of the product and improve the efficiency of the molding operation. However, if the temperature is too low, it will easily cause the appearance of the ...
  • Common injection molding product defects and solutions-7 Apr 10, 2020
    Weld line Causes: 1. The product design is unreasonable. 2. The injection speed is too slow. 3. Injection pressure is too low. 4. The injection time is too short. 5. The mold surface temperature is too low. 6. Insufficient exhaust. 7. The gate position is unreasonable. 8. The melt temperature is too low. Solutions: 1. Increase the material temperature. 2. Improve injection speed. 3. Increase the m...
  • Common injection molding product defects and solutions-8
    Common injection molding product defects and solutions-8 Apr 26, 2020
    Cell the reason: 1. Holding pressure is too low. 2. The holding time is too short. 3. The injection speed is too fast. 5. The back pressure is too low. 6. The mold temperature is too low. 7. The product is too thick. 8. Melt temperature is too high. Solution: 1. Increase the back pressure of the melt. 2. Reduce the reverse rope. 3. Increase holding pressure. 4. Increase holding time. 5. Reduce the...
  • Defects discussion of plastic molded parts Apr 30, 2020
    Today we are going to discuss the injection defects of burn marks. 1. Poor venting, the residual gas in the cavity generates high temperature due to adiabatic compression 2. The surface of the cavity is not smooth enough to easily adhere a small amount of plastic, which is easily scorched by high temperature, and then mixed into the melt 3. The melt temperature is too high 4. Injection pressure is...
  • Common injection molding product defects and solutions-9 May 11, 2020
    Injection molding products Color mixing the reason: 1. The barrel and screw are not completely cleaned when changing the mold. 2. The barrel temperature is set too low or too high. 3. Melt back pressure is too low. 4. The screw speed is too slow. Solution: 1. Make sure to clean the screw and barrel. 2. Increase or decrease the screw speed. 3. Increase or decrease screw back pressure. 4. Increase o...
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A total of 16 pages

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