Forklift Water Glass Lost Wax Casting

After more than ten years of precipitation, Qinhuangdao Zhongwei Precision Machinery Co., Ltd. has rich production experience in water glass lost wax precision casting, lost foam precision casting, silica sol precision casting, and shell sand casting. We expect manufacturers from all over the world to consult and negotiate business.

Product Description

1. Implementation standards: The company strictly implements ISO9001 & TS 16949 certification.

2. Product material standards: ISO, GB, ASTM, SAE, ISO, EN, DIN, JIS, BS

3. Main processes: sand casting, silica sol investment casting, water glass investment casting,shell casting,deburring, sand blasting, machining, heat treatment, leak testing, surface treatment, etc.

4. Available materials:

Carbon steel, alloy steel, stainless steel, gray iron, cast iron, cast steel, cast aluminum, cast copper, etc. can be customized according to customer requirements.

Forklift Water Glass Lost Wax Casting Process

The lost wax casting process first appeared in the Spring and Autumn Period, and the whole process is manual operation. Its technological process is: the wax is made into the shape to be made, and then the high temperature resistant fine mud is drenched on the surface of the wax type, and the spun yarn is sprinkled on the surface of the mud, repeated many times to form a complete shell, after drying heating makes the wax melt out to form a cavity for casting copper liquid. After casting, shelling, grinding, and aging, an exquisite bronze ware is displayed in front of you.

The ancient working people of our country created this lost wax casting process, which is now called investment casting. The base of Zenghouyi's tomb is a plurality of intertwined dragons. They are connected end to end and staggered up and down to form a multi-layered moiré-like pattern hollowed out in the middle. The casting process can take advantage of the lack of lost wax and the easy engraving. Common tools can be used to engrave the same lost wax material as the tomb plate of Zenghou Yi, and then add a casting system, paint, dewax, cast , you can get the exquisite memorial plate of the tomb of Marquis Yi of Zeng.

The lost wax casting process was practically used in industrial production in the 1940s. The development of aviation jet engines at that time required the manufacture of heat-resistant alloy parts with complex shapes, precise dimensions and smooth surfaces, such as blades, impellers, and nozzles. Because the heat-resistant alloy materials are difficult to machine and the shapes of the parts are complex, it has been impossible or difficult to make them by other methods. Therefore, it is necessary to find a new precise molding process, so the lost wax precision casting handed down from ancient times is used for reference. With the improvement of technology, modern investment casting method has achieved important development on the basis of ancient technology. Therefore, the development of the aviation industry has promoted the application of investment casting.

my country began to apply investment casting in industrial production in the 1950s and 1960s. Since then, this advanced precision casting process has been greatly developed, and it has been widely used in aviation, automobiles, machine tools, ships, internal combustion engines, steam turbines, telecommunication instruments, weapons, medical equipment and knives and other manufacturing processes. Manufacture of handicrafts.

Fundamental Contents

A: Process flow

Mold confirmation → making silicone mold → remaking wax mold → pouring suspension → dewaxing → crusting → lost wax → molten copper casting → cleaning → sandblasting → refurbishment → Forklift water glass lost wax casting semi-finished product storage

B: Process standard

1. Wax mold manufacturing:

(1) The performance of the mold material is the basic factor affecting the size and surface quality of the casting.

(2) Selection and configuration of mold materials;

(3) Wax mold making;

(4) Wax repair and wax model assembly;

(5) The pouring suspension: the pouring suspension is the channel for guiding the molten metal into the wax mold, and it is also the channel for the liquid to flow out when the wax is lost. It plays a feeding role when the casting is solidified, and it also bears the weight of the wax mold and the shell.

2. Crust (shell manufacturing)

(1) Raw materials:

1) Water glass (also known as bubble long alkali) is an aqueous solution of sodium silicate.

2) Quartz sand (powder) SiO2% can use different mesh numbers according to needs.

3) Bauxite: A12O3%>85%, 280-320 mesh.

4) Detergent: surfactant (neutral) (addition amount 0.025-0.05%)

5) n-octanol: defoamer (addition amount is 0.1-0.3%)

6) Ammonium chloride aqueous solution: curing agent, (20-25%, saturated state).

(2) Degreasing;

(3) Coating configuration (configured in the mixer);

(4) Crust;

3. Lost wax, sand filling, melting;

4. Pouring;

5. Clean up the warehouse.

Post Casting Process

1. Heat treatment: annealing, carbonization, tempering, quenching, normalizing, surface tempering

2. Processing equipment: CNC, WEDM, lathe, milling machine, drilling machine, grinder, etc.;

3. Surface treatment: powder spraying, chrome plating, painting, sandblasting, nickel plating, galvanizing, blackening, polishing, bluing, etc.

Moulds and Inspection Fixtures

1. Mold service life: usually semi-permanent. (except for lost foam)

2. Mold delivery time: 10-25 days, (according to product structure and product size).

3. Tooling and mold maintenance: Zhongwei is responsible for precision parts.

Quality Control

1. Quality control: the defective rate is less than 0.1%.

2. Samples and trial run will be 100% inspected during production and before shipment, sample inspection for mass production according to ISDO standards or customer requirements

3. Testing equipment: flaw detection, spectrum analyzer, golden image analyzer, three-coordinate measuring machine, hardness testing equipment, tensile testing machine;

4. Provide after-sales service.

5. The quality can be traced back.

Application

Trains and railways, cars and trucks, construction machinery, forklifts, agricultural machinery, shipbuilding, petroleum machinery, construction, valves and pumps, motors, hardware, electrical equipment, etc.