The use of beryllium copper in plastic molds
Release time:
2024-06-28
Now the plastic mold manufacturing has more and more to start using beryllium copper mold materials, and there is a rising trend, what is the reason for this phenomenon? Follow me to understand the use of beryllium copper in plastic molds, and the reasons.
Now the plastic mold manufacturing has more and more to start using beryllium copper mold materials, and there is a rising trend, what is the reason for this phenomenon? Follow me to understand the use of beryllium copper in plastic molds, and the reasons.
1. Sufficient hardness and strength: after many tests, engineers can find out and master the best precipitation precipitation hardening conditions of beryllium copper alloy as well as the best working conditions and beryllium copper dispersion characteristics (which is a prelude to the official products of beryllium copper alloy to be applied to the market); beryllium copper materials used in plastic molds are required to go through many rounds of tests to finally put the best in line with the manufacturing and processing of physical properties and chemical composition of beryllium copper. Theoretical and practical proof - beryllium copper hardness in hrc36-42 can be applied to plastic mold manufacturing requirements of hardness, strength, high thermal conductivity, easy and convenient machining, long service life of the mold characteristics and save the development and production cycle.
2. Good thermal conductivity: beryllium copper material thermal conductivity is conducive to controlling the temperature of plastic processing molds, but also easier to control the molding cycle, while ensuring the uniformity of the mold wall temperature; if compared with the steel mold, beryllium copper molding cycle to be much smaller, the average temperature of the mold can be reduced by 20% or so, when the average de-touching temperature and the mold the average temperature difference between the wall is smaller (for example, in the case of the mold parts not easily cooled) the use of beryllium copper molds is not easy. When the difference between the average de-touching temperature and the average wall temperature of the mold is small (for example, in the case of mold parts that cannot be easily cooled), the cooling time can be reduced by 40%. And the mold wall temperature is only reduced by 15%; the above characteristics of beryllium copper mold material will bring several benefits to the use of this material mold manufacturers to shorten the molding cycle, productivity; mold wall temperature uniformity is good, to improve the quality of the pulled products; mold structure is simplified because of the reduction of the cooling pipe; you can increase the material temperature, thereby reducing the wall thickness of the product, reduce the cost of the product.
3. Long service life of the mold: the cost of the budget mold and the continuity of production, the expected service life of the mold for the manufacturer is very important, in the case of beryllium copper strength and hardness in line with the requirements of beryllium copper on the mold temperature stress insensitivity can greatly improve the service life of the mold, in determining the use of beryllium copper mold material should also be taken into account before the yield strength of beryllium copper, the modulus of elasticity, thermal conductivity and the temperature expansion coefficient. Beryllium copper resistance to thermal stress is much stronger than mold steel, from this point of view beryllium copper service life is remarkable!
4. High heat penetration: In addition to pulling the temperature conductivity, the heat penetration of the mold material is also quite important to the impact of plastic products, in the use of beryllium copper molds can eliminate overheating traces, if the heat penetration rate is low, the higher the contact temperature of the distal region of the mold wall, which will increase the temperature difference of the mold, and in the case of extreme cases will cause changes in regional temperatures from the shrinkage of the plastic products at one end of the mark extends to the other end of the Overheated product marks.
5. Excellent surface quality: Beryllium copper is very suitable for surface finishing, it can be plated directly, and the adhesion performance is very good, and the polishing treatment of beryllium copper is also very easy.
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