Investment casting technical flow process
The silica sol casting process also called precision
investment casting process. It is a less cutting or no cutting casting
process. It is an excellent technique in foundry
industry. Its application is very extensive. It not only applicable to various
types, various kinds of alloy and casting, and produce the casting dimension
accuracy and surface quality is higher than other casting method, Even other
casting method can not do the complex, high temperature resistant, not easy
machining castings, all can be used for investment precision casting process.
The investment casting process, it is a process that use fusible
materials make soluble model, and coated with several layers of tailor-made
refractory coating on the surface, after drying and hardening become a whole
shell, melt the shell model by steam or hot water. Then put the shells in the
sand, filling dry sand in all round and modeling. Finally roasting it based on
high-temperature in the furnace, the shell after roasting, and getting the
casting part after pouring molten metal.
The investment casting process can produce High precision
dimensional parts, generally can reach to CT4-6(sand casting is CT10-13, die
casting is CT5-7). Due to the complexity of investment casting process, there
are many factors influencing the casting dimension accuracy. Such as shrinkage
of mold material, deformation of the casting, Shell heating and cooling line
quantity change in the process, alloy shrinkage and deformation of castings in
the solidification process. The surface finish of investment castings is higher
than the ordinary casting, can reach to Ra1.6~3.2.
The greatest advantages of investment casting is casting parts
have high dimensional accuracy and surface finish, so it can reduce the
mechanical processing. The another advantage of investment casting method is
that it can cast all kinds of alloy and complex casting part, special casting
high temperature alloy casting part.
The precision of the Steel Casting Part: ±0.15mm~
Smoothness of surface of rough part: Ra6.4;
Shrinkage rate of steel investment casting products: 0.6%;
Material wastage rate: 5%;
General stainless steel casting part machining allowance: 0.7mm;
Surface preparation methods: Sand blasted, Shot blasting, Powder coating,
Painting, Plating, Electrophoresis, Polishing.
Our
company's production equipment and management system
CNC machining center: 8 sets AIGEMA A-8;
CNC lathe machine: 6 Guangzhou Machines and 7 Shenyang Machines;
Work days of one week: From Monday to Saturday;
Shift work: 2 shift per day;
Working hours: From AM 8:00 to PM 5:00;
2D and 3D drawing Software: AutoCAD, UG, Pro/E, SolidWorks 2013;
QC control: New type NANO CMM, FPI M5000 desktop metal analyzer, Easson
projector, Mechanical properties tester.
The steel casting process and machining
equipment:
Steel Casting Part Stainless Steel Lost Wax Casting, Steel Casting Part, Steel Investment Casting Part, Steel Silica Sol Casting Part NINGBO BEILUN LEMA MACHINERY TECHNOLOGY CO.,LTD , http://www.china-lema.com
Product features of flow control valve Flow control valve, also known as 400X flow control valve, is a multi-function valve that uses high-precision pilot method to control flow. Applicable to the pipelines for controlling the flow rate and pressure in the distribution pipe, keeping the preset flow rate constant, limiting the excessive flow to a predetermined value, and appropriately reducing the upstream high pressure, even if the pressure of the Shanghai Zhongpu valve changes upstream of the main valve. Nor does it affect the flow downstream of the main valve.
Flow control valve selection: can be selected according to the pipeline diameter. According to the maximum flow rate and valve flow range selection.
Flow control valve works:
The digital display flow control valve is composed of an automatic valve core, a manual valve core and a display part. The display part consists of the flow valve movement, the sensor transmitter, and the electronic calculator display.
Its work is complicated. The measured water flows through the valve, and the water impinges on the impeller in the flow movement. The rotation of the impeller and the sensing of the sensor cause the sensor to send an electrical signal proportional to the flow rate. The flow signal is sent to the electronic calculator through the wire and goes through the calculator. After the calculation and microprocessor processing, the flow value is displayed.
Manual spool is used to adjust the flow rate, according to the displayed value to set the desired flow value. The automatic valve core is used to maintain the constant flow, that is, when the pipe network pressure changes, the automatic valve core will automatically open the fire and close the small valve port to maintain the set flow value. 
Flow control valve working principle and product features
The flow control valve is a valve that controls the flow of the throttle orifice by changing the hydraulic resistance of the throttle orifice under a certain pressure difference to adjust the movement speed of the actuator (hydraulic cylinder or hydraulic motor). Mainly include throttle valve, speed control valve, overflow throttle valve and diverter flow valve. The installation form is horizontal installation.