Main product：Die-casting,** moldi
The period of high unit pr** and high profit of the market business has passed. Intense **petition and e**epreneurs facing cost pressures insist on the production and operation of zinc alloy die-casting products. Naturally, they enter the period of change and “the business pr** approaches the production cost”. The severe test that producers face. Then, the effective co**ol of costs is inevitable, and the cost needs to be co**olled scientifically through processes such as raw materials, production processes, automated production, s**ing of human resources, and technological reforms. Increasing production and stabilizing production quality are the root causes of effective cost co**ol. The main manifestations are:
(1) Reasonable selection and full use of raw materials;
(2) Improvement of mold technology;
(3) Improvement of product qualifi**ion rate in the post-processing process;
(4) Co**ol of human resources;
(5) co**ol of surface treatment.
1. Reasonable design of mold
(1) Name: Mobile phone cover;
(2) Product: 40g;
(3) The total weight of the nozzle: about 45g.
From the results of production statistics, as shown in Figure 1, a reasonable die nozzle, flow ** material level and cold trough design, the product die casting production of the billet pass rate of 98%; production slag co**ollable at 10% to 15%, Usually the production plant will produce 15% to 30% of the slag; after processing: easy to clean the front, no die, process reduction, s**e manpower, effectively co**ol the loss, polishing process convenient processing, yield increase; Figure 2 shows the mold Defective runner and gate design, post-processing difficulties, low output, high cost.
Mold design points:
(1) The material level of the nozzle and the flow ** is rationally desig**, and the flow distribution of the flow ** and the gate are smooth and smooth.
(2) There are only three chilling overflow troughs, and the number of water outlets is small, which reduces the production of the retur** charge and secondary feed.
(3) The product does not open the exhaust and open the cold trough at both ends, will not produce shrinkage;
(4) There is no sprue or open cooling trough in the inner frame of the product, and the clean front is simple, and it is not necessary to clear the nozzle and clean the nozzle;
(5) mold temperature stability, long life, high yield.
2. The **** of raw materials is correct
In zinc alloy mobile phone shell products, the **** of raw materials is correct, which can ensure product quality and increase production. The raw materials for mobile phone housing production are: Zinc alloys Zinc3#, 5#, 7#, and 8# for die casting. Consider the purchase cost: (1) usually adopts 3# material; (2) the product with higher strength requirement is produced with 5# material; (3) the anti-deformation strength is good, and the wear-resistant part is produced with 8#.
Product Features: As shown in Fig. 3 and Fig. 4, the mold is easy to deform, the strength is not enough, the post-processing deformation loss is great, and the quality meets the customer's degree is low.
Use of raw materials: (1) Production of 5,000 molds with Zinc5#, 20% increase in the product's intermediate bone deformation rate, 15% increase in the finished product's qualifi**ion rate **pared to 3# material, (2) Production of 8,000 molds using Zinc8# material, The non-deformation pass rate increased to 96%.
In the production and use of raw materials, due to the low content of copper in 3#, the mechanical properties of the weak parts of the products are low and easy to be deformed; for the production of 5# materials, the content of copper **ponents is increased to about 1%, which helps a lot Improve product strength, but also failed to achieve the desired level of qualifi**ion rate; in trial production of 8 # material, the product does not h**e a deformation rate of deformation is effectively improved, 8 # zinc alloy due to the increase in the content of aluminum **ponents, with the stability and high deformation resistance The **prehensive performance of the strength shows that the selection of raw materials for zinc alloy die-casting products should be scientifically selected according to the structure and appli**ion of the product in order to achieve satisfactory quality results and cost-effectiveness.
3. Conclusion
From the above analysis, it can be seen that, in the development of the zinc alloy mobile phone die casting processing industry, stable and continuous production and operation require continuous training of job position skills. Improve the design of the mold to improve the smooth production of die-casting. Reduce the production of secondary materials, increase the yield, optimize the process, improve automation, reduce the cost and continuous reform, improvement, improvement process, scientifically improve the bad design of the mold, develop and try a variety of production methods, from the product structure The details to consider the mix and rational use of raw materials can effectively co**ol costs and create profits.
