一. From the point of view of the equipment's qualities, injection molds are high-durability industrial equipment.
the main purpose of injection molds is to make things on a huge scale and for a long time. Injection molds usually have to handle tens of thousands or even millions of opening and closing actions, as well as long-term extreme working conditions like high temperature, high pressure, and high-speed injection. This is different from low life molds like 3D printing molds, silicone molds, and vacuum formed molds.
injection molds are usually high-value assets when it comes to investments. A set of medium to large injection molds can cost anywhere from tens of thousands to hundreds of thousands of yuan. Complex precision molds can even cost millions of yuan. This kind of investment must have long-term consistent use value, or else it can't be used in business logic.
二. How the design of the mold structure affects how long an injection mold lasts
the mold frame structure's design. A good mold frame structure can make sure that the force is spread evenly as the mold opens and closes, which lowers the stress concentration in one area. If the mold frame is not stiff enough or the construction is not right, it will distort, wear down the guiding column, misalign the template, and cause other difficulties that will shorten the mold's life.
The next step is to design the core and cavity. The logic of the cavity structure directly affects how much resistance there is to demolding, how much stress the object shrinks, and how much wear there is on the mold surface. If the demolding slope design isn't good enough and the product is pushed out for a long period, it will damage the surface, break the corners, and even split the mold cavity.
三. Choosing the right mold materials is the most important part of making an injection mold last.
The material used to make the mold has the most direct and important effect on how long injection molds last.the kinds of mold steel. P20, 718, H13, S136, NAK80, and other common mold ladles are some of the most common. There are big variances in the hardness, wear resistance, corrosion resistance, and thermal stability of different steels. For instance:
P20 is good for molds that live for a medium to low amount of time.H13 is good for places with high temperatures and high pressure;S136 is good for situations where excellent corrosion resistance is needed in medical and food grade settings.
Next is the procedure of heating the material. The heat treatment method can make the same type of steel last for varying amounts of time. When steel is quenched, tempered, and aged properly, it can become much more stable on the inside and more resistant to fatigue.
The third is technology for treating surfaces. Nitriding, chrome plating, PVD coating, polishing, and other similar processes are common ways to treat surfaces. These steps can make the mold surface far more resistant to wear and corrosion. Surface treatment is frequently an important first step in making molds that last a long time.From a material point of view, high-durability injection molds are not always made of the "cheapest materials," but of the "materials that best fit the working conditions.
四. Usage circumstances and maintenance management can make injection molds last longer.
If you don't utilize the mold correctly, it won't last as long, even if it's well-crafted and constructed of high-quality components.the settings for the injection molding process. injection pressure, locking force, or injection speed is too high, the mold can be overloaded for a long time. This speeds up wear and tear on the cavity and the structure.The next thing to think about is the sort of material used for injection molding. Fiberglass-reinforced plastics and mineral filler materials are naturally very resistant to wear and tear. you don't treat the surface of molds specifically, they will wear out more faster than regular plastics.
五. In practice, injection molds tend to be very durable over time.
Injection molds offer clear high durability properties in most industrial situations, as shown by real-world data from the industry.In the consumer electronics industry, the average life of a plastic shell mold is between 300,000 and 1 million mold cycles. In the home appliance industry, the average life of a large structural component mold is between 1 million and 3 million mold cycles. In the automotive industry, the average life of a key component mold is even more than 5 million mold cycles.
