What Have Effects On Pump Casting Quality

There are many factors that have effect on pump casting quality. Such as process operation, casting process and raw materials quality. The casting material should own good quality and reach the relevant standard. Such as metal charge and refractory material, fuel and flux, modifier and casting sand, sand binder, coating materials and so on.

If you use some material or product which are in bad quality will make the casting produce blowhole, slag, sand sticking and other defects. That has an influence on the appearance quality and internal quality. What’s more, it may lead to casting scrap. So it must satisfy the relevant standard to process. The geometry and size of castings is determined by working conditions and metal material while designing process for casting. Certainly don’t forget to ensure that the product designing is reasonable.

However you had better to reduce metal consumption in casting process. Reducing the cutting amount can not only saving metal, but also bring a lot of benefits. While designing the structure, you can choose precision casting method to reduce cutting amount, such as pressure die casting, investment casting. On the other hand, you can set a groove on the processing surface.

Details Effects Casting Profit

Casting is regarded as a traditional metal forming industry. With the development of technology, casting is fusion of other sectors of the materials and technology gradually. Certainly it is also in the transformation and growth. Future raw material includes pig iron, scrap steel and iron liquid. The iron liquid is formed through a series of actions in the smelting process. In the aspect of shape manufacturing, resin, steel and other materials will replace the traditional wood. We can insert different kinds of pipes in the casting if it is necessary. So the casting structure will be more reasonable. These are the development trend and direction of the large castings in future. At the same time, it brings important influence on saving material.

In the actual production, preparation corresponding process with structure characteristic of each casting. Large casting types mainly include elongated, round and high-Large. For example, elongated beam and bed can prevent the casting deformation.

Improving quality is the best way to save energy and material. There are many casting processes and effect factor. But the quality controlling is very difficult, especially for large casting. No matter the tooling, molding process or melting, they all have high requirements. Every detail needs to be done well. Good quality of the molten iron is the key to producing successfully.

Safe Operation Of CNC Machining

With the development of technology, CNC machining technology application not only bring revolutionary change to traditional manufacturing industry, but also make manufacturing industry to be a symbol of industrialization. As we all known, recent years the CNC machining technology has been widely used more and more. We must pay attention to operating the machine tool safety and maintenance carefully.

At first, operator who use the machine tool should own good comprehensive quality. Certainly it is necessary to train them. Secondly, there should be a good working environment for CNC machine tool. The machine tool can no be shining with the sunlight directly. Besides the environment should keep clean, dry, constant temperature and without vibration.


No matter which type of the CNC machine tool is, they all have their own a set of operating rules. This can ensure operator safety. What’s more, this can also ensure equipment safety and good product quality. So operator must obey the rule and operate correctly. If you use the CNC machine tool first time, please let it idle about ten minutes. At the same time, operator should be more careful while boot and shutdown.

Alkali Corrosion Method For Aluminum Die Castings

Sometimes we find that the surface of aluminum die casting looks rough. There are many factors cause this phenomenon. For example, there are a variety of compounds and other inclusions. Sometimes chemical composition segregation is not uniform. And it not forms dense oxide film after casting cooling. At this time, we will find the alkali corrosion method can play a key role to improve this problem.

However controlling alkaline etching time is difficult, at the same time, it is also a key factor. If the alkaline etching time is short, aluminum die casting may can not be moved throughly. On the contrary, too long time will cause production excessive corrosion. So that the dimension tolerances will be changed. The best method is changing the alkaline etching procedure. In other words, treat the die casting with alkali corrosion method, this will not only improve surface quality, but also prevent many problems which caused by alkali corrosion.

After alkali corrosion treatment, you can also use hydrochloric acid to fast light. This effect will be better. Die casting is one of the most advanced metal forming method. It is an effective way to achieve the goal of little chips and no scraps.

Basic Raw Material For Producing Molds

The basic material for producing molds is foundry sand and sand binder. The most commonly foundry sand is silica sand. When high temperature performance of silica sand cam not meet the using requirement, we usually use the zircon sand, iron ore, corundum sand and other special sand.

In order to make the molds and cores with intensity, people should join the sand binder in the casting and made loose sand bonded. The most widely used sand binder is clay. Certainly you can also make different kinds of water-soluble silicate, phosphate and various kinds of synthetic resin into sand binder. According to different strength way and binder, sand mold which used in sand casting can divided into three types. They are clay wet sand, chemical sclerosis sand and clay dry sand.

The cor made of core sand has wider application. Oil viscosity is low and the mixed core sand always with good fluidity. So it is very easy to be compaction while core making. However the core which just made is in low strength and usually undertake by copying support core plate. Then put it to the oven which has in high temperature for several hours. The disadvantage of this core making method is that the core is easy to deform in the release, handling and baking process. So the precious of casting size has been decreased. This method also should cost long time to baking and many energy consumption.

Metal Mold Use Gravity Die Casting

Gravity die casting is refers to the process that the liquid metal pured into the casting with the earth gravity, it is also known as gravity casting. The generalized gravity casting include sand casting, metal mold casting, investment casting, lost foam casting, mud casting and so on.

There are many process methods to make metal material. Such as casting, forging, extrusion, rolling, drawing, punching, cutting and powder metallurgy. the most basic, the casting process is the most commonly, basically and widely used process.

The metal mold casting is a modern process that made by heat resisting alloy. Metal type can not only use gravity casting, but also use the pressure casting. Metal casting can used repeatedly. Metal casting is not only in good size precious, smooth surface, but also its strength is  higher than sand and not easy to be broken. Generally speaking, people will preferred the metal mold casting as long as the casting material melting point is not too high in mass production of small casting.

However the metal mold casting also has some disadvantages. Metal mold is not cheap because that heat resistant alloy steel and on its top are relatively expensive. Certainly the overall costs are much cheaper than die casting mold. Each product cost is obviously too high for small batch production, it is not easy to be accepted. Metal casting is limited by mold material, processing equipment and cavity machining equipment. So  it is incapable of action for large castings.

Characteristic Of Chemical Hardening Sand Casting Process

Chemical sclerosis sand strength is much higher than clay sand. After manufacturing sand, it will strip finally and don’t need any trimming. So casting can reflect the size and contour shape accurately. At the same time, it will not be deformation in the process. The prepared casting size is in high precision.

Binder and hardener are easy to be mixed with sand because their viscosity is not high. Sand mixing equipment has light structure, low power and high productivity. Sand processing part can be simplified.

The mixed sand has good fluidity before sclerosis. People can choose foam materials, such as wood, plastic and metal. Chemical sclerosis sand which regard resin as binder is in high cost. But casting is easy to separate with sand after pouring.

The binder content in chemical sclerosis sand is lower than clay sand and without any powder materials. Sand mold or core surface should be coated with high quality coating in order to avoid metal penetrating to the sand. Chemical sclerosis sand is in low cost. There is no smell in working environment. Old sand can not be recycled directly. It need regeneration treatment. But the regeneration of water glass sand is more difficult.

How To Prevent White Spots

Aluminum alloy casting has porous structure and high porosity. It contains many types of metallic and non metallic impurities. It is difficult to ensure the quality of anodic oxide film. We can take the following measures to get normal quality of the film and avoid white spot on anodic oxide film after dyed.

1. Density impact method with high voltage and large current. In the initial stage of anodizing people usually use high voltage and large current impact to make them connected together.

2. Grinding method on aluminum alloy casting surface. Grinding can make aluminum fill to the casting pore. It can play an important role on connecting. In fact this method will not be very ideal because that some filling positions will fall off in the process of alkaline etching and anodic oxidation.

3. Peening on the aluminum alloy casting. Generally speaking wall thickness of casting can meet the requirements of pressure during shot peening. Big pressure can be in favor of improve the blasting quality. It can closed pores and cracks through extruded pellets. And also improve the strength and clean on the surface of aluminum alloy casting. As we all know, there is no white spots on the unprocessed casting surface. This is because the casting surface has a dense oxide film.

Casting Application In The Lighting

Casting can form complex shape and  form a beautiful shapes through the NC machining of mold cavity. Casting processing quantity is little, sometimes even without cutting. Casting can also design different wall thickness and structure to satisfy the strength and function of lighting. Certainly we can do the surface treatment according to different installation environment. There is strong corrosion resistance in outdoor environment. Besides using different casting process can not only suitable for small production, but also used for large production. So it can satisfy the demand of various lighting sales. All kinds of casting are widely used in lighting manufacturing industry especially for the manufacture of outdoor lamps.

The most widely used in the lighting is pressure casting, the second is sand casting, metal casting and little investment castings according to classification of the casting method.


Street lamp, advertising lamp, square lamp, part of outdoor wall lamp shell and lamp cover are mostly use aluminum die casting. Garden lamp shell, connectors of wall lamps, most of them are made by aluminum casting and sand casting.
The surface of outdoor lamp is made by aluminum die casting. So we usually use spray and paint surface treatment. The surface of copper and stainless steel castings mainly use polishing or vibration light. Sometimes we can also use paint or spray treatment in order to keep consistent with other parts.

Reduce Metal Consumption In Pump Casting Process

Pump parts can be used the sand casting which is regarded sand as main material traditional process to make molds.

Generally speaking, casting usually use the gravity casting sand. Certainly it also could take low pressure casting or centrifugal casting process if there is special requirement. Sand casting could be adopted by small, large, simple piece, complex parts, single and large quantities. The molds that made by sand casting are wood and they are also called wood mold. But the wood mold is easy to be broken or deformed. Casting has higher refractoriness than metal types mold.

However the sand casting also have many disadvantages. Every sand mold could be pured for only one time. The casting is easy to be damage and must be processed again. So the production efficiency of sand casting is usually low. The casting dimension with rough surface is in low precision because of the overall properties of sand soft is soft and with many porous.

Some water pump castings is fed with riser. Then resection riser and return remelting. This will increase the casting cost, and lost a part of metal. The riser size has direct relationship with section thickness and shape. The structure which can reduce shrinkage hole and shrinkage porosity is helpful to reduce riser and even eliminate. Sometimes it cause directional solidification by increasing the wall thickness of casting. Water pump casting weight increased, but it can reduce the consumption of riser metal greatly. In contrast it still reduce the metal consumption.

The Characteristics Of Gravity Casting

Casting can divide into gravity casting and pressure casting. Gravity casting is refers to the process that the metal liquid pulled into a mold with the gravity by earth. It is also called casting. Its process are melting, pouring the filling, exhaust, cooling, mold, heat treatment and so on. Sand casting and gravity casting are used most  most commonly and relative in lowest price.
Certainly gravity casting also has its own characteristic. Porosity of castings is little and heat treatment can be carried out. Strength of the product can be improved after heat treatment and even more than die-casting products.
Products in low dense. Its strength is slightly lower, but its elongation is in more low dense. The product surface finish is not high. Casting products is easy to form pit which is similar to blasting after cooling the surface. Usually the mold made by gravity casting is in longer service life and lower cost. The process of gravity casting is also simple. It is not suitable for processing thin wall parts.
Metal casting is made of metal material and it is a process that put the melt metal poured into the mold for casting under the gravity. One piece can pouring hundreds to tens of thousands times. So it is also called permanent mold casting. The metal mold casting is not only suitable for  the aluminum alloy, but also the production of iron and steel metal casting.

Purification Method For Aluminum Casting liquid

Aluminum casting products widely used for automobile accessories, various household supplies, industrial machinery and accessories. People will purify the aluminum liquid after derived from the electrolytic bath because it usually has various impurity. People mainly use flux and gas purification method in industry.
Flux purification use the flux to form a large number of fine droplets and make oxide impurities in the liquid aluminum adsorbed and dissolved. Then it will generation of new material float on the surface and removed after cooling. The solvent which is regarded as cleaning agent should be salt with low melting point, low density, high activity and very strong adsorption capacity.
Gas purification is a main method of primary aluminum purification, the gas is chlorine, nitrogen or mixture of both. Chlorine gas purifying often use active gas as purifying agent. It will produce many small bubbles after he chlorine get into the aluminum liquid and dispersed in aluminum liquid evenly. Hydrogen and some debris attach on the bubbles will separate with the bubbles rising.
Nitrogen gas purifying method use gaseous nitrogen directly into the aluminum fluid with alumina ball as filter media. At the same time, the liquid clean by nitrogen and it accelerate the reaction by non metallic inclusions and dissolved hydrogen and aluminum oxide.

Aluminum Die Casting

Aluminum casting is a part made by pressure cast. It use die casting machine which is installed casting mold, put the heated liquid aluminum or aluminum alloy into casting machine inlet port. You will get aluminum part with limited shape and size of the mold. Such parts usually called aluminum die casting. Aluminum die casting has a different name in different places.
Aluminum castings can be manufactured to various parts. Such as die casting aluminum auto parts, aluminum die-casting auto engine fittings, aluminum die casting, aluminum engine cylinder gasoline engine cylinder head, valve rocker arm, aluminum die-casting aluminum die-casting valve holder, aluminum die-casting electric fittings, aluminum die-casting motor end cover, aluminum die casting shell die-casting aluminum die casting, pump casing, construction parts, aluminum die-casting accessories, aluminum die casting, aluminum die-casting aluminum wheel rail accessories and so on. The die cast which the melted die cast aluminum is injected into the molds under high pressure of 10—20Mpa. The thickness of die cast part is mini 2mm, the draft angle of die cast is 0.5o. The finish of die casting is the best in sand casting process and die casting process.
Aluminum casting can make all kinds of complicated shape because aluminum and aluminum alloy has good fluidity and plasticity, casting  processing are cast in die casting machine that with pressure. We can also make high precision and smooth finish, thus greatly reducing the casting allowance machining casting and metal aluminum or aluminum alloy. It not only save power, metal materials, but also greatly save labor cost.

The Market Demand Of Aluminum Wheels

Aluminum wheel is made by sand casting or gravity die casting, then heat treatment and machining. Now many people agree that the aluminum alloy wheels are better than steel wheels because that they are beautiful, light, fuel economy, good elasticity, good thermal conductivity and not easy deformed.
Energy, environment and safety are the three issues of great concern to the world today which is closely related to the development and universal application of the automotive industry. With the modern cars rising the requirements of energy saving and  safety and environmental regulation become strict, lightweight car is more urgent. Aluminum has great significance of educe vehicle weight, reduce fuel consumption, reduce environmental pollution and improve the operating because of its light weight, high strength, good formability, affordable, and high recovery. And it has been the material of choice for automotive industry.
Aluminum wheels 2Kg average lighter than steel wheels. It can fuel efficient about 5% -7% at 60km/h speed. It has been widely used in the West car industry, and has huge development potential.Data shows that the world's annual production of aluminum wheels has been over 100 million. The huge attractive of international market of the aluminum wheels stimulate the development of Aluminum wheels industry.
Despite the rapid development of Chinese auto industry, but compared with the industrialized powers are still many gaps car. One is there is a certain gap of automotive timber between domestic and foreign. Usually Consumption of aluminum content of the car was only about 40-50kg. With the acceleration of the world's automotive lightweight,  especially after joining the WTO, the international competition of auto market trends to be fierce. Energy-saving and lightweight of the car have become necessary trend of the development of our automobile industry.