Skip to main content

Method of pouring and cleaning of castings

Commonly used pouring methods in investment casting are:
1) There are the following types of thermal gravity casting methods.
This is the most widely used form of casting, that is, after the shell is removed from the roaster, it is cast at high temperature. At this time, the metal cools slowly in the mold shell, and the mold can be filled with high fluidity, so the casting can well replicate the shape of the cavity and improve the accuracy of the casting. However, the slow cooling of the casting in the hot mold will cause coarse grains, which reduces the mechanical properties of the casting. When casting carbon steel castings, the surface of the casting that cools more slowly is also prone to oxidation and decarburization, which reduces the surface hardness, finish and dimensional accuracy of the casting.invest-casting.com Precision Investment Castings China prototype company service include : High Quality Investment Casting Parts Custom,Lost Wax Investment CastingSand Casting,Lost Foam Casting,Gravity Casting,Die Casting,Graphite Casting ,Casting Moldsmanufacturers.
2) Vacuum suction casting
Put the mold shell in the vacuum casting box, and suck the gas in the mold cavity through the tiny pores in the mold shell, so that the liquid metal can better fill the mold cavity, copy the shape of the mold cavity, improve the casting accuracy, prevent pores, pouring Insufficient defects. This law has been applied abroad.
3) Crystallization under pressure
Put the shell in the pressure tank for pouring. After the end, the pressure tank is closed immediately, and high-pressure air or inert gas is introduced into the tank to solidify the casting under pressure to increase the density of the casting. The maximum pressure abroad has reached 150atm.
4) Directional crystallization (directional solidification)
Some investment castings such as turbine blades, magnetic steel, etc., if their crystalline structure is columnar crystals arranged in a certain direction, their working performance can be greatly improved, so the directional crystallization technology of investment casting is rapidly developed.
Casting cleaning
The main contents of investment casting cleaning are as follows:
(1) Remove the mold shell from the casting;
(2) Remove the casting from the pouring system;
(3) Remove the shell refractory adhering to the casting;
(4) Cleaning after heat treatment of castings, such as descaling, edge and cutting gate residues, etc.invest-casting.com Metal Casting Material include : Stainless Steel CastingAluminum CastingIron CastingBrass CastingTitanium CastingSteel Casting

The task of investment casting process design is
(1) Analyze the manufacturability of the casting structure;
(2) Select a reasonable process plan, determine the relevant casting process parameters, and draw the casting diagram on the basis of the above;
(3) Design the pouring system and determine the module structure.
It should be noted here that when considering the above three aspects, the main basis is still the basic principles of the general casting process, especially when determining the process plan and process parameters (such as casting fillet, machining allowance, process ribs, etc.) , except that the specific data is slightly different due to the technological characteristics of investment casting, the design principle is exactly the same as that of sand casting.
The task and importance of investment casting process design
Investment casting is a casting process with less or no cutting. It was also called lost wax casting in the past. Because the castings produced by the investment casting process are better than other casting methods in terms of dimensional accuracy and surface quality In addition, the investment casting method can complete the production of some complex and difficult to process castings, so it is deeply loved by enterprises.
Regarding the investment casting process, the investment casting process design is one of the most important links in the entire investment casting process. This link has a large technical difficulty factor and plays a very important role in the entire investment casting process. This link is mostly due to some professional and technical people.
Like other casting process designs, the design tasks of the investment casting process are: a. According to specific requirements, analyze the craftsmanship of the casting structure; b. Plan a reasonable process plan, determine the relevant casting process parameters, and draw the casting diagram on this basis. ;c. Design the pouring system and determine the module structure. Except for the specific data due to the slightly different process characteristics of investment casting, the design principle is exactly the same as that of sand casting.
Since the investment casting process design link is of great significance to the entire casting process, and this link has very high requirements on the quality of the designers themselves, enterprises should pay considerable attention to this link.

invest-casting.com Metal Casting Industries include : Automotive Casting ,Pump Casting ,Plumbing Sanitary Casting ,Lock Casting ,Medical Casting,Machinery Casting ,Marine Casting ,Food Machine Casting,LightingCasting.

Comments

Popular posts from this blog

How does an auto parts company develop

With the party branch as the core of the bank's guidance, the socialist state-owned enterprise must have a strong and combative party organization, so that the majority of employees can have cohesion and the enterprise can compete with the outside world. The three are complementary and mutually supportive. Promoted. The key to the problem lies in whether the party organization has combat effectiveness. If the leadership team has fully played its role, it can unite the masses closely and enable the enterprise to forge ahead toward a common goal. In turn, if the mass foundation is good and the enterprise situation is good, the party organization can be more effective. Work well. The success of Zhanjiang Auto Parts Company fully illustrates this point. They mainly focused on the following tasks: The first is to enhance the combat effectiveness of the leadership team. Party branches and leading cadres are required to have a higher political level and profess...

The heat treatment process of auto parts consumes a lot of energy

  The heat treatment process of auto parts consumes a lot of energy, so it is necessary to work to reduce the energy consumption in each treatment stage, which includes furnace improvement, carburizing process control, quenching medium, cooling rate, etc. However, the operation of these processes is directly related to the properties and hardenability of the processed steel with different compositions. In order to meet the requirements of advanced heat treatment technology, various types of steel have been studied from smelting. The improvement of these steels and related technology has greatly improved the performance and processing productivity of auto parts. The chemical composition and hardenability of steel are the key factors to obtain the best heat treatment effect for auto parts. In order to obtain high-quality small-modulus gears in automotive products, it is necessary to carefully control the surface and core hardness of the gears. The develo...

Powerex CM400DY-24A

# CM400DY-24A Powerex CM400DY-24A New 400A/1200V/IGBT/2U; N Channel 400 A 1.2 kV 2.71 kW 1.2 kV Module, CM400DY-24A pictures, CM400DY-24A price, #CM400DY-24A supplier ------------------------------------------------------------------- Email: sales@shunlongwei.com https://www.slw-ele.com/cm400dy-24a.html ------------------------------------------------------------------- CM400DY-24A Features  · Low VCE(sat)  · Compact package  · P.C. board mount  · Converter diode bridge, Dynamic brake circuit Applications · Inverter for motor drive · AC and DC servo drive amplifier  · Uninterruptible power supply Maxim um ratings and characteristics  .Absolute maximum ratings (Tc=25°C unless without specif...