The fundamental way to improve the quality of precision casting trees:

(1) the imagination of taking the lead in making a piece shall be proper, and the best construction plan shall be selected as far as possible; the imagination of making a piece shall consider the technical requirements of making a piece and the manufacturability and feasibility of building a lasting consistent with it.

(2) the making process of precision casting last is also an important link to ensure the quality of the last, and the processing method and precision of the last in the making process will also reflect the application life of the last.The precision of each zero component indirectly reflects the disassembly of all the last components. Besides the response of the precision of the equipment itself, the processing method of the whole machine should be improved to improve the skill level of the fitter in the process of the last grinding and fitting.If the total disassembly effect of the last fails to meet the request, the improvement rate of the action of the last in the absence of abnormal form will be made in the mold trial, and the overall quality of the last will be greatly responded.Similarity: the adjustment form of the last device shall be appropriate; under the condition of hot runner, the power supply shall be accurate, the icing dry circuit shall be satisfied with the assumption request, and the parameters of the last machine, die casting machine and punch machine shall be consistent with the assumption request.Similarity: the secondary effective way of blanking die is blade wear, it is necessary to choose the material with high nominal Angle and good wear resistance;Stamping die to accept periodic load, easy to cause nominal fatigue crack, surface spalling, it is necessary to choose the nominal toughness good data;Die should be selected friction coefficient is particularly low data;Because die casting die is subjected to repeated thermal stress, the data with strong thermal fatigue should be selected.Regarding the injection mold, when the plastic parts are ABS, PP, PC and other data, the last data can be used to choose the pre-hardening and tempering steel; when the plastic parts are high brightness and bright data, the corrosion resistance steel can be selected; when the large batch of products, the quenching and tempering steel can be used.

(3) the accurate application and protection of precision casting last is also a major factor for improving the last quality.In addition, in recent years, a new technique called FCVA, which is called "vacuum study abroad new-type stone film", is able to form a layer of solid and well-lubricated, uniform and dense cover film on the surface of the whole machine, which is especially suitable for solving the problem of nominal cover of last, and is also an effective way to improve the quality of last.

(4) the assumption of precision casting of the last is the most important step to improve the quality of the last. Considering many factors, including the selection of the data of the last, the applicability and safety of the last structure, the machinability of the whole machine of the last and the convenience of the last training and repairing, the department should be more thoughtful at the beginning of the assumption.Ten million, if make a piece belong to make goods or consumption batch is equal and small word, do not must stop certainly last the nominal strengthen of whole machine solves.

 therefore, to ensure shoe last remaining original quality of shoe last are excellent original precision, is building in the process of take the lead to improper choice of high precision processing methods, such as electrical sparkle, line cutting, CNC machining, simultaneous should pay attention to the precision of the shoe last review, include shoe last machining precision of the machine, remove the precision, and after the test check the examination and the precision of the shoe last, job analysis is reviewed also need to choose high precision measurement instrument, too much about the simple structure of the shoe last surface in the name of forming machine, if use the general ruler, vernier card would be helpless to accurate measurement data,At that time, it is necessary to choose the fine measurement facilities such as the three-coordinate measuring instrument to ensure the accuracy of measurement data.

(1) fine smelting last data selection not only to be satisfied with the depositor for the quality of the goods request, but also need to think about the profits of the data and the strength of the period is set, must be based on the type of last, the use of task form, processing progress, secondary effect, etc.Similarity: the punching die can adopt solder strengthening, cemented carbide gas welding, etc., so as to improve the wear resistance and compressive strength of the whole last machine surface;The hot processing of last steel such as die casting mould and plastic mould can be solved by nitriding (hard nitriding), so as to improve the wear resistance, heat resistance, fatigue resistance and abrasion resistance of the whole machine;Drawing die, winding die can adopt sulfuration solution, in order to reduce the conflict coefficient, improve the wear resistance of data;Carbonitriding (soft nitriding) can be used to strengthen various kinds of trees.In addition, we also need to consider and adopt the last data with small affinity with the parts, so as to prevent the sticky mold from deepening the wear of the last machine, so as to reflect the quality of the last.Regarding nominal strengthening, we must use different kinds of trees; we must use different kinds of strengthening methods.

(2) precision casting last structure assumptions, too loose structure, easy to operate, but also to ensure that the last complete machine has residual strength and just degree;When the construction of the last permits, the turning angles of all names of the last machine shall be assumed to be rounded to avoid stress collection;Regarding dies, cavities and all punches and cores, it is possible to adopt combined or inlaid structures to eliminate the stress set.For cold drawing dies, it should be equipped to prevent the installation of parts or waste blocking.Precision casting are accurate use of shoe last, still need to die shoe last stop current protection, guide pin, guide sleeve of shoe last and has absolute position should often inject smooth oil in activities, on the forging die, plastic mould, die-casting mould and so on shoe last is each mold forming smooth agent or stripping agent should be sprayed in the name of the forming machine.If we stop the protective protection of solutions for the last, and solve the data in the process of protection, we can prevent the results that can emerge in the current consumption of the last, and improve the frequency of maintenance tasks.

(3) precision casting is envisaged that it is necessary to reduce the maintenance of a zero components need to disassemble the scope, especially when the wearing parts change, to reduce the scope of its disassembly.At the same time, we must consider how to reduce the response to the quality of the last caused by the wear and tear on the coasting parts and the repeatedly struck parts during temporary operation.