一,Unreasonable mold design leads to damage
1. The cavity and flow path were not designed correctly
Too much difference in wall thickness: Plastic that flows at different speeds can easily warp, not fill properly, and cause more stress in the mould cavity, which can cause cracks or wear.
Too much or too little flow through the channel: High injection pressure can easily cause cracks or wear in certain areas.
Not enough exhaust holes: Gas retention creates bubbles and burns, which raise the pressure on the injection molds surface and damage it locally.
2. Flaws in the way the ejection method was designed
A layout that isn't level or an ejector pin that isn't the right width can cause uneven force during ejection, which can damage or scratch the mould cavity.
There should not be a gap between the spring and the ejector pin. If this is used for a long time, the ejector pin may bend or break.
3. An unreasonable design of the cooling system
Because the cooling water line isn't laid out evenly, the injection molds gets too hot in some places, which causes thermal stress and cracking.
Low cooling efficiency and big changes in temperature can make mould stress and smooth surface wear happen faster.
injection moldsdesign flaws can put too much stress on the mould when it's being used, which is a major cause of mould damage.
二, Material for dies and technique for making them
The wear, corrosion, and fatigue strength of a mould are directly related to the materials used to make it and the techniques used to make it.
1. Not enough strength and mould steel
Steel that isn't hard enough doesn't hold up well against wear, and long-term injection moulding can cause scratches, wear, and even cracks.
If the heat treatment isn't done evenly or enough, it can cause low local hardness, which raises the risk of breakage.
2. Bad care of the surface
Nickel coating, nitriding, or polishing that isn't even can speed up wear in certain areas.
Surface flaws like holes and scratches can become places where stress builds up and cracks form easily.
3. Not enough precision in the machining
If guide columns, sliders, or holes have too much tolerance, it can make it hard to put the mould together and cause abnormal stress.
Misalignment or uneven pressure during assembly can make damage or wear happen faster.
三, Malfunctioning and incorrect use hurt the mould
injection molds damage often happens because of bad operation, especially on high-yield production lines.
1. Error setting parameters for injection moulding machine
When the injection pressure is too high, it goes beyond what the mould was meant to hold. This can crack the mould cavity or break the ejector pin.
When the fire rate is fast or the holding time is long, local stress rises, putting uneven stress on the mould surface and slider.
Too high of a melt temperature: Plastic that is heated too high can eat away at the mold's surface, which can cause wear cracks after a while of use.
2. The switch module isn't working right
If you open or close the mould too quickly or unevenly, it could hit something and scratch the mould hole or get the slider stuck.
If something foreign gets into the injection molds hole or guide system, it can scratch, clog, or even break.
3. Not enough upkeep and cleaning
When injection moulding residues, dust, or lubricants build up, they can make friction worse, cause high temperatures in certain areas, and speed up wear.
If exhaust holes or guide lines get clogged, the pressure in the area can rise, which can lead to cracks or scratches.
四,Effects on the production setting
The area where the injection molds are used can also have a big effect on how long they last.
1. Huge changes in humidity and temperature
High temperatures will make thermal stress worse and speed up the cracking of mould fatigue.
Too much humidity can easily lead to mould rusting and a loss of longevity.
2. Use certain things
Having glass fibre, carbon fibre, or high-filling materials in it will make the space wear out faster.
Chemical weathering on the surface of moulds may be caused by plastics that are corrosive.
3. Vibrations and impacts from outside the equipment
can wear out faster if injection moulding machines have too much vibration or an unsteady base.
Moulds can also damage the mould hole, slider, or guiding system if they are handled wrong or hit each other.
五, Lack of care and upkeep on time
1. Not enough grease
Regularly lubricating the guide column, slider, and ejector pin is important because without it, friction will rise and wear will happen faster.
2. Not enough cleaning done
If there are still impurities in the mould cavity or vent holes that are blocked, they can lead to high injection pressure and surface scratches.
