• Riveting Fracture of Lamp Head(Fracture of lamp head during riveting)
    Bensong Solution

    Bensong Solution:

    1. Choose appropriate thermal conductive materials, taking into account both thermal conductivity and toughness.

    2. Increase the thickness of rivet joint of lamp head, recommend more than 1.4 mm.

    3. The step is placed 2 mm in riveting position or the R angle is excessive.

    4. Stabilize the riveting press pressure and riveting depth. It is recommended that 200,000-300,000 sets of riveting needles be replaced once.

  • Black spots and yellowing(Black spots appeared in the lamp cup during injection moulding)
    Bensong Solution

    Bensong Solution:

    1. Black spot control of raw materials.

    2. The recycling ratio is less than 30%, and there is no aluminium chip.

    3. The appearance of aluminium parts is clean without oil stain and aluminium chip.

    4. Control the residence time of raw materials in the barrel.

  • Burning, Bubble(Burning and bubbles appeared in the lamp cup during injection moulding)
    Bensong Solution

    Bensong Solution:

    1. Increase die exhaust.

    2. Improve material fluidity.

    3. To increase the thickness of the parts, it is suggested that the wall thickness should be greater than 1.0 and the thickness should be gentle and excessive.

  • Appearance fog(When making lamp cups, the appearance is foggy and dull.)
    Bensong Solution

    Bensong Solution:

    1. Temperature machine is used to control the injection process of high gloss parts.

    2. The wall thickness of smooth structure should be smooth and excessive to avoid sudden change in the thickness of parts.

    3. Controlling material moisture content and drying process.

    4. Improve material fluidity.

  • Processing is not smooth(In the process of injection moulding, the lamp head is easy to break directly, and the dry material is broken in the mould.)
    Bensong Solution

    Bensong Solution:

    1. Grid inside the lamp cup to increase the overall demoulding force of the lamp cup.

    2. Adjust the die and use the slider structure in the inversion to avoid the use of strong stripping.


  • Contraction mark(When making plastic-clad aluminium bulb lamp, the shrinkage marks on the bottom of some cups are serious.)
    Bensong Solution

    Bensong Solution:

    1. When adjusting the matching degree between material and mould, and designing the mould and structure, the matching between material and mould should be considered comprehensively.

    2. When designing lamp cup, keep the thickness of plastic wall as uniform as possible.


  • Crack(Cracking occurs when plastics-clad aluminium lamp shell is manufactured and placed naturally or tested at high and low temperatures (-40/120 C).)
    Bensong Solution

    1. Controlling the size (concentricity) of the aluminium parts and dealing with the sharp edges of the aluminium parts.

    2. Choose appropriate thermal conductive materials, taking into account both strength and toughness.


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