Inhibition of wax models aluminum mold manufacturing, depending on the level of simple and measured the size of normal to spend how many weeks to many months time and then, the above each layer of material to fast active molding machine, using information add method and laser as heating source, in order to each layer sintering or sinter and simultaneous link layers, before making the whole machine the consumption is often adopted in the whole machine processing precision casting or collapse, quick quick precision casting is all adopt von berg systeme do non-metallic mold cavities or transition to copy a way to one of the most absorbing force of the department slice layer according to the order of cumulative rise is still imagined by the appearance of the machineLoose play features and disadvantages of the two, how many weeks but this secondary type is used to making shell RPM skills are used in the smelting: quick forming building skills don't referred to as the fast prototype build (Rapid Prototyping Manufacturing, title RPM), is a high science and technology achievements and quick molding skill is the use of fine smelting, can be divided into three types: one is missing (die) process, for small batch parts consumption;Second, indirect shell method is used for small consumption.Three quick shoe last wax models is made to a small amount of consumption is the plaster of Paris type smelting process, the shortcut is still missing molds, and then the losing plaster mould and the demand of the whole machine, not of metal The consumption of non-metallic to profit is very low, 2% ~ 5% of normal die casting consumption as long as PM skill features:RPM skills and conservative technology are combined, can complement each other, received the wasted effort effect type plaster of Paris smelting the first step is to use fast manufacturing mode can be missing, then the fast molding missing buried in plaster slurry loss of plaster mould, the plaster mould again into the burning this is due to the burning furnace smelting process can consume the machine powder filling in simple shape features and disadvantages of the two, can is a new goods to obtain the economic benefits of subjective homemade fast shaping skills compared with conservative way to save is common to preferential, its features like:1. To build a simple machine blank shoe last cycle and profits rise greatly, using the personnel information indirectly machine, forming machine is no longer needs imagine build shoe last casting blank forming manufacturing process for a conservative, creating profit sensitivity, low process can lose simple shape and heavy casting 2. Complete the blank, near net shape forming machine machining allowance greatly decreases, and prevent the waste of material, increase the power cost, environmentally friendly and renewable stagnation (3) combined with conservative measures, quick can complete quickly smelting shoe lastSmall batch machine consumption, such as performance, creating a conservative way to inject new angry because it is the simple 3 d building into a series of 2 d building overlay, so can not will shoe last and machine can generate arbitrary under the environment of the zero element of simple shape, greatly advances the frequency of consumption and to build the flexible 4. Machinable conservative method is difficult to build the whole machine materials, such as gradient material machine material machine and so on, the more conducive to the new data of 5.Easy to imagine the process and create the integration of the process, the entire consumption process of the number of words, and CAD mold is stored in the indirect contact, the whole machine see is what you get, can be modified at any time to create at any time, to ease the simple structure of the whole machine CAD/CAM process CAPP bottleneck performance。

6. The time and cost of technological preparation have been greatly reduced, which greatly increases the cycle and profit of single-piece homemade and small-batch consumption, especially for the development of new goods and the consumption of single-piece small-batch complete machine.In that way, the missing moulds of rapid prototyping were synthesized at low temperature and finally went missing completely. Dirty and dirty plaster moulds were dull and soft, and a normal process took 2 days in and out.Last making can be done indirectly with the help of quick forming skill, which saves the time and cost of making.Unlike the conservative approach, Additive processing starts with the CAD mold of the machine, and then goes through hardware layering and numerical control molding, using laser beams or other methods to deposit data into the industrial machine, known as Material Additive Manufacturing or Material Increase Manufacturing.Because the mold is a one-time use, making the external structure of a simple machine change can, can consume forging or machining can not consume the whole machine.After losing the aluminum mold, how many more weeks will it take to lose the ability to cast.The molding materials are sinterable powders of various nationalities, such as paraffin, plastic, low-melting non-metallic powders or their mixed powders.At first, the molten non-metallic aluminum alloy was injected into the plaster mold in the special vacuum casting facility. After freezing, the complete plaster mold lost the non-metallic parts.Especially for some simple castings, such as blades, impellers, starter cylinder block and cylinder cover, etc., the making of last was once a process of great difficulty. Even with the application of noble facilities such as numerical control machining core, it was still very difficult to process skills and the range of technological feasibility.

In the consumption of precision casting, the making of sand table, core box, pressed wax mold and die-casting mold is often realized by means of machining; sometimes, it requires the workmen to stop repairing; the period is long and the cost is large; from the last imagination to the processing and making is a simple process of several links at one time; a slight mistake may lead to complete idling.

Adopt quick smelting skill consumption of four-cylinder starter wax mold:

(1) quick smelting

Rapid molding and precision casting are complementary, both of these methods are practical for the simple shape of the machine to create.And precision casting skills (including plaster smelting) and sand smelting skills are extremely childish skills in our country. The combination of these two skills has completed the low profit and high benefit of consumption and reached the quick means of making.But for low melting point non - metallic parts, such as aluminum - magnesium alloy parts, plaster of Paris smelting, the frequency is higher.The process of rapid molding is the first student into a degree of goods of three-dimensional CAD industrial mold or surface mold data, which will be converted into a certain data system, and then use the corresponding hardware from the data cut out a set thickness of a series of slices, or perhaps indirectly from the CAD data cut out a series of slices.It includes SLS, SLA, SLM and other molding methods, integrated with CAD skills, numerical control skills, laser skills and data skills and other ancient high-tech achievements, is the main group of conservative build skills.Consumption cycle is very short, as long as normal 2 ~ 3 weeks.Although fine smelting has a lot of preferential, but its consumption process is simple and refined.

(2) plaster of Paris smelting

The quick molding skill can quickly require wax mold or missing melting mold required by fine smelting and wood mold or sand mold used for sand mold smelting, which can deal with the difficulties of simple components such as wax mold or wood mold in conservative smelting, such as long preparation cycle, large input and difficulty in manufacturing curved surface.

Is building the industry, especially the flight, aerospace, national defense, bus and other point of strength, the root of the core components are normal non-metal complete machine, and the same number of non-metal complete machine error for the balance, with no specified surface or simple structure and external and contain detailed structure of the complete machine.And numerical control processing, smelting, non-metallic cold spraying, such as silicon mold build wrist, with quick and active shape has ancient change mold, shoe last, and the whole machine to build strong weak wrist, non-metallic machine is suitable to its national conditions in the sight of complete single or small batch of agile make ineffective way, flying shuttle, bus diesel locomotive, furniture and other's sphere lost broad use.

(3) precision casting

Precision casting is generally used to create steel parts from quick formed parts.Figure 2. For the wax mold and casting of the four-cylinder starter consumed by quick smelting method, it shall be made according to the conservative non-metal casting method. The duration of last making shall be about half a year, and the cost shall be 100,000 yuan.With the quick smelting method, the rapid molding smelting investment 3 days, smelting 10 days, so that the whole homemade mission than the original plan in advance of 5 months.Precision casting is the most accurate method of all smelting methods, the precision is normally better than 0.5%, and repeatability is good, as long as a large number of casting machining can be imported and used.Therefore, the last cost in small batch consumption is assessed to make the unit price noble.Casting is a conservative process with low profit margins, high process sensitivity, and the ability to produce simple forms and heavy castings.

 Rapid prototyping skills are the focus of current domestic molding technology.Unless the material consumption, fine smelting is also very expensive, 50% ~ 80% of the consumption from the wild.If there is no quick and active molding, the consumption of molds is the bottleneck process of fine smelting.But without fine smelting, the use of rapid active molding will also have great limitations.The quality of simultaneous casting can lose the guarantee of invalidity and the casting power is higher.

Precision casting and rapid forming technology is the focus of domestic molding technology.