Plastic Injection Mold Manufacturers Product Design Summary

• Posted by mould minghuang June 24, 2023 - Filed in Business - #Plastic Injection Mould Manufacturers  #Forging Mold Manufacturers  - 302 views

   

  Share design summary of car lampshade Forging Mold Manufacturers
  The decorative frame of the car headlight is one of the important components of the car light. The appearance requirements are strict, and the mold needs to be electroplated. For the automotive headlight decorative frame mold, the following points should be paid attention to when designing:

  (1) Weld lines should be avoided first on electroplated parts, because weld lines will appear on electroplated parts, which will affect the appearance of plastic parts. Weld lines should be avoided when designing gating systems. If the weld line is unavoidable, it should be driven out of the non-appearance area as much as possible, and the mold flow analysis must be verified before the gating system is designed.

  (2) The surface of the decorative frame is generally designed with a pattern. When designing the mold, attention should be paid to the depth of the pattern on the plastic part, as flow marks are generally prone to appear.

  (3) The molding process range of the plastic part material is small, and the surface of the plastic part is easy to produce bright spots and is difficult to control. When designing the mold gating system, the runner should be thick and large, the gate should be a fan gate, and the gate width is about 35~40mm, which is conducive to melt filling.

  (4) Automobile bumper injection molds are prone to sticking. The early design prevention of mold sticking of plastic parts is generally:

  a. The inner side of the plastic part is designed with an undercut, which is easy to stick to the mold and has a strong locking force. The undercut depth is 0.5~1mm, and the undercut is designed near the rounded corner of the plastic part.

  b. Design reinforcing ribs on the inner side of the corresponding plastic part with relatively large covering force of the fixed mold of the plastic part, and design an undercut hook on the push rod. According to the characteristics of the plastic part, reinforcement ribs and boss columns (commonly known as boss columns) are designed on the plastic parts inside the 6 LED lamp areas to avoid deformation of the plastic part.

  In the design of this mold, the area with the greater clamping force of the plastic part is greater than 5 degrees, and the side of the movable mold is designed with a 0.5mm deep undercut pattern, so the ejection and demoulding of the mold are stable, and the movements of each mechanism are smooth. The mold is safe, stable and reliable, and there is no sticking phenomenon in the mold, which successfully solves the sticking problem of this kind of plastic parts. After the trial production of this type of mold, the loading effect is good and the size is stable. The refitted car lights have been recognized and praised by customers at the auto show, and have created certain economic benefits for customers.

  
  The main design points of the automotive lampshade injection mold are:

  (1) Special injection molding process equipment is required, and an injection molding machine dedicated to the production of BMC plastics is required. The requirements for injection molding process equipment are very strict.

  (2) BMC material is a superhard plastic. In the mold design, it is necessary to design the heating system and the parting surface design discharge system. Formed parts must be quenched to improve wear resistance and die life.

  (3) The plastic part of the reflector is a device to prevent the light from directly hitting the headlights, reflect the light, and avoid direct light, and the light distribution requirements are strict. Plastic parts are important exterior parts of automobiles, and there are many patterns on the surface of plastic parts for decorative purposes.

  (4) The ejection system of the BMC material mold design should be balanced, and the specifications of the push rod should be designed as large as possible, and the quantity should be as large as possible, otherwise it will cause difficulty in molding. plastic parts.

  (5) Since the demoulding slope of the high-gloss plating part is too small, it will cause difficulty in demoulding, so the side wall of the mirror plastic part should be designed as large as possible, generally recommended to be 5°~10°. Of course, the premise is that the function and shape of the plastic part cannot be affected.

  (6) Plastic parts cannot have sharp corners and sharp edges, and all corners must be designed as rounded corners, because the molded parts are prone to stress cracking after quenching.

  (7) Plastic Injection Mould Manufacturers pay attention to the left and right reflector holes and the pattern on the surface of the plastic part shift left and right, and cannot be designed to be mirror symmetrical, because the bulb and the lamp holder will not be separated left and right, and the rest of the features are mirror symmetrical.