Brass Investment Casting

Why choose us

Our Factory
Our company employs three professor-level engineers, five senior engineers, twelve junior engineers, twenty inspectors, and approximately 350 workers. We operate one precision casting factory, one sand casting factory, one die casting factory, and two machining factories, covering an area of 8,000 square meters. Our annual output is about 500 tons of silicon glue investment castings and 2,000 tons of water glass investment castings.

Sales Market
Our sales have gradually increased from the original 3 million RMB to the current 50 million RMB. We understand the design and quality requirements of foreign customers for mechanical products, with about 85% of our products exported to North America, Europe, and other regions worldwide.

Our Certification
Our company has passed ISO 9001, TS 16949, TUV, and other quality certifications.

Our Products
Our main products include automotive parts, mining machinery parts, machinery equipment parts, medical machinery parts, marine parts, and aviation equipment parts.

Brass Investment Casting

Brass investment casting is a process that creates parts through the metallic replication of wax models. Investment casting using molten brass results in a final product that is very smooth and detailed without flash or parting lines. This technique can create parts that are precise and lightweight.

Brass Valve Castings
Our brass valve castings made from investment casting and sand casting.
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Brass Impeller Castings
Brass impeller casting is one of the main brass products of our SIMIS. According to customer drawings and requirements, we use investment casting and sand casting to produce.
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Brass Joint Casting
Our brass joint casting is made by investment casting and necessary machining as customer's drawings. Also we can supply brass joint by forging and machining.
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Features of Brass Investment Casting

Excellent surface finish and luminosity
Suitable for parts with complex shapes
Exact dimensions, saving machining costs
Applicable for mass production of cast iron
Suitable for various metal alloys and materials

Application of Brass Investment Casting

Brass precision castings are used in a wide variety of industries, including:

In mechanical and plant engineering, such as conveyor technology, ventilation technology, tooling, power and printing machines, drive technology, robotics, and automation, among others.
In special machine and plant engineering for bevel gear segments, gears, bevel gears, and worm rings.
In pump construction for pump, suction, and pressure housings, paddle wheels, segment sockets, and step housings, among other applications.
In medical technology for milling arms, pipe bends, and medical devices.

Some subcategories of brass investment casting process are

01/

Lost Wax Investment Casting brass: A traditional method where wax patterns are coated in refractory material to form a mold. Allows for high precision and accuracy, but can be costly and time-consuming.

02/

Colloidal Silica Investment Cast Brass: A modern method that uses colloidal silica solution to create the mold. Faster production times and lower costs compared to lost wax investment casting, but precision and accuracy may not be as high.

03/

Vacuum Assisted Investment Cast Brass: A method that applies a vacuum to the mold during the casting process to remove air bubbles and improve quality and reduce defects.

04/

Micro Investment Casting brass: Specialized method used to produce small, precise parts. Similar process to traditional investment casting but with smaller, more intricate wax patterns and molds.

How To Cast Brass

To ensure safety during copper casting, you must wear personal protective equipment and have good ventilation in the furnace and casting area.

Casting Brass is Accomplished as Follows

Mold Design: Mold design for casting brass has to be done first. Molds can be customized by shape and size of the required castings. Sand, metals or other materials are used to make them.

Prepare the Mold: Prepare mold as per designed mold. This includes cleaning up the molds by removing dirt or residues.

Prepare the Brass Alloy: The composition of various types of brass alloys depends on proportions between zinc and copper. These metals usually mix together in ratios that give desirable characterizations for a particular brass type.

Melt the Brass Alloy: Heat this mixture in a furnace until it melts completely at its melting point. The temperature should reach that which would melt this alloy smoothly during casting processes.

Prepare for Casting: Place pre-prepared mold in its right place and ensure inside surface of mold is dry and clean.

Pouring the Brass Alloy: Use fitting tools to put down molten metal into the mold from inside a furnace. Careful control over pouring prevents introduction impurities such air bubbles.

Cool and Solidify: Castings made out of this alloy cool off while solidifying within their respective molds to end up with a final shape of choice. Time needed for such cooling largely relies on dimensions plus forms involved in forming process.

Separate and Clean: Once solidified, one can take out castings from those moulds by breaking these apart entirely after they cool down fully so as to remove sprues etc., then clean cast piece’s surfaces properly removing any residue or rough areas left behind during production stage thereby enhancing overall quality achieved upon completion including appearance thereof too like plating which may require cutting off excess material/trimming down edges or grinding away burrs created during machining process including polishing up its surface look before finalizing this step ensuring certain dimensions such as size, weight etc., are met according to specifications given.

Machining and Surface Treatment: Brass casting may be further processed depending on requirements. The steps may involve cutting, trimming, grinding, polishing and/or plating in order to meet desired dimensions, shape and surface treatment for a particular cast item.

Custom Brass Investment Castings to Your Precise Specifications

We understand that off-the-shelf components may not always meet your exact requirements. That’s why we offer a comprehensive selection of custom-made brass investment castings, tailored to your precise specifications. Explore our range of non-standard brass investment castings, including:

Custom Shapes and Sizes

Crafted to your precise dimensions and specifications for a perfect fit in your applications.

Specialized Features

Designed for unique requirements, such as complex geometries or specific functional needs.

High-Strength Alloys

Engineered for applications demanding superior load-bearing capacity and durability.

Corrosion-Resistant Alloys

Utilizing brass alloys with exceptional corrosion resistance for harsh environments.

Precision Machining

Manufactured with the utmost precision to ensure consistent performance in critical applications.

How to Choose the Right Investment Casting Material?

Understand Application Requirements: Start by understanding the specific requirements of your application. Consider factors such as mechanical properties (strength, hardness, toughness), corrosion resistance, wear resistance, temperature resistance, and any industry-specific standards or certifications that need to be met.

Evaluate Material Properties: Research and evaluate different materials based on their properties and how well they align with your application requirements. Consider factors such as tensile strength, yield strength, elongation, hardness, thermal conductivity, corrosion resistance, and other relevant properties.

Consider Environmental Factors: Evaluate the operating environment in which the cast part will be used. Assess factors such as exposure to corrosive chemicals, high temperatures, extreme weather conditions, and other environmental factors that may affect material performance. Choose a material that can withstand the specific environmental conditions.

Review Previous Successful Applications: Look for examples of successful applications that are similar to yours. Examine the materials used in those applications and consider their performance and suitability. This can provide valuable insights and help guide your material selection process.

Consult with Experts: Seek advice from material suppliers, metallurgical experts, or experienced investment casting professionals. They can provide guidance based on their expertise and knowledge of different materials, their capabilities, and limitations. They may also suggest alternative materials or provide insights specific to your application.

Cost Considerations: Evaluate the cost-effectiveness of different materials. Consider material costs, availability, and any additional processing or finishing requirements. Remember to balance cost considerations with the desired performance and longevity of the part.

Test and Validate: Conduct material testing and validation to verify its suitability for your application. Perform mechanical tests, corrosion tests, and other relevant tests to ensure that the selected material meets the required specifications and performance criteria.

Compliance with Standards: If your application requires compliance with specific industry standards or certifications, ensure that the chosen material meets those requirements. Some industries, such as aerospace, automotive, or medical, have stringent standards that must be adhered to.

Consider Processing Requirements: Evaluate the compatibility of the material with the investment casting process. Consider factors such as casting temperature, fluidity, shrinkage, and solidification characteristics. Some materials may require specialized equipment or techniques, so ensure that your casting facility has the necessary capabilities.

Types Of Brass Available For Casting

Brass (an alloy of copper and zinc): Also called alpha brass or brass base alloy, it mainly consists of copper (Cu) and zinc (Zn). This alloy has good casting properties, including mechanical ones, making it very suitable for general castings.

Aluminum Brass: An alloy mainly composed of copper and aluminum, with some amount of zinc (Zn). The use of this alloy results in higher strength and corrosion resistance, making it widely used in shipbuilding, the automobile construction industry, and electrical industries.

Tin Brass: An alloy made by mixing copper with tin, usually containing certain proportions of tin (Sn) and zinc. Tin brass provides greater hardness, corrodes faster, and has better anti-friction properties, which are commonly found in bearing manufacturing industries like gears and transmission parts.

Lead Brass: An alloy primarily formed by adding lead to copper, typically containing specific quantities of lead (Pb) and zinc (Zn). It features machinability, self-lubrication, and corrosion resistance, making it useful for manufacturing valves, pipe fittings, and other mechanical parts.

Zinc Brass: An alloy where zinc is the major component alongside copper, normally containing higher percentages than all other constituents combined. It has good casting properties and is resistant to corrosion. Castings produced from this alloy include water meters, instruments, and decorative items.

Safety Precautions For Brass Casting

We take our responsibility to ensure safety at work, particularly during processes such as brass casting, which involve high temperatures and potential hazards, very seriously. To protect our employees and ensure a safe working environment, we must take the necessary precautions and measures.

Personal Protective Equipment
We must equip our workers with Personal Protective Equipment (PPE) for brass casting; this is non-negotiable. Heat-resistant gloves and face shields are essential, as well as long sleeves made of flame-resistant fabric, safety goggles, and clothing with long sleeves. These items protect against molten metal splashes and intense heat, helping to prevent potential burns. We take responsibility for ensuring that everyone in our team understands the importance of wearing PPE correctly.

Ventilation and Workspace Safety
Ensuring a well-ventilated work area is crucial to remove the fumes and gases produced during brass melting. We ensure that our facilities have proper ventilation systems to maintain a safe, breathable environment. Additionally, keeping the workspace free of clutter and clean reduces accidents and increases safety. We adhere to strict housekeeping regulations, ensuring that all equipment and tools are properly stored and that the work area is kept clean and free of hazards.

Fire Safety Measures
Brass casting is a high-temperature process, so fire safety is a priority. In our facilities, we have strategically placed fire extinguishers and fire blankets that are readily accessible for emergencies. We conduct regular fire safety drills to ensure all staff are familiar with emergency procedures.

Our Factory

Taiyuan Simis Investment Casting Co., Ltd was established in 2014. After 15 years of development, it has developed from a single precision casting factory to a comprehensive mechanical product supplier that can provide precision casting, sand casting, die casting and precision machining parts.

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FAQ

Q: Can you investment cast brass?

A: Brass investment casting is a process that creates parts through the metallic replication of wax models. Investment casting using molten brass results in a final product that is very smooth and detailed without flash or parting lines.

Q: What is the proper sequence of investment casting?

A: Explanation: The correct sequence of investment casting steps is slurry coating, stucco coating, pattern melt out, and shakeout. Option (c) follows this sequence and is therefore the correct answer. Option (a) has the stucco coating step after the pattern melt out, which is incorrect.

Q: How do I choose a casting method?

A: The casting process selection decision will be constrained in part by a range of geometric features, such as minimum section thickness and minimum core size, but also by achievable quality, taking account of surface finish, porosity, etc, and production parameters, such as sample lead-time and economic production run.

Q: Is brass a good investment?

A: And while polished brass won't tarnish, as unfinished brass does, and both polished and unfinished brass will eventually change color over time. Finally, because brass is so inexpensive it really doesn't hold any value that will make it worth anything in the future.

Q: How much does brass shrink when cast?

A: Brass: This copper-zinc alloy can experience shrinkage rates similar to copper, generally around 0.5% to 1% during cooling. 5. Cast Iron: Cast iron, a versatile material with good castability, can exhibit shrinkage rates ranging from 0.5% to 1.5% due to cooling after molding.

Q: What is the pattern of investment casting?

A: Investment casting is a manufacturing process in which a wax pattern is coated with a refractory ceramic material. Once the ceramic coating material is dry and hardened, the wax is melted out and leaves an internal cavity the shape of the final product's geometry.

Q: How accurate is investment casting?

A: The investment casting process is capable of excellent, repeatable as-cast tolerances. With as cast capabilities of +/- three standard deviations when a single point is repeatedly measured—typically +/- . 003 to +/- . 004 per inch.

Q: How do I start investment casting?

A: Investment casting, also known as the lost wax process, is a precise manufacturing technique. It starts by coating a wax pattern with a ceramic shell. Once the ceramic hardens, the wax is melted out, leaving a hollow mold. Molten metal is then poured into the mold, taking the shape of the original wax pattern.

Q: What is the sequence of investment casting?

A: There are several steps involved in the investment casting process: die construction, wax pattern making, ceramic mold creation, pouring, solidification, shakeout, and cleanup.

Q: What is the minimum thickness for investment casting?

A: The standard minimum wall thickness for investment casting lies between . 040" and . 080". Wall thickness as low as 0.020" has been achieved within a small area.

Q: How can you tell good brass?

A: If the item feels lighter than expected, then it may not be solid brass. Scratch an inconspicuous area of the item with a sharp tool. Real brass will reveal a similar yellow tone underneath, while brass plating will show a silver, or sometimes copper base metal.

Q: What are the problems with brass casting?

A: Casting defects are classified into different types: blow hole, scab, scar, penetration, mismatch, misruns, cold shut, hot tear shrinkage, warpage, pin hole buckle, and swelling. A good brass casting service should be able to remedy these defects effectively.

Q: What is the shrinkage allowance for investment casting?

A: One of the key determinants of the shrinkage allowance applied to patterns will be the alloy to be cast. Most molten metals will shrink as they solidify. For stainless steels and nickel alloys this might typically be 2-3% by volume, whereas for copper alloys it can be 5-6% and aluminium even more.

Q: Why choose investment casting?

A: Investment castings cut down on labor time and produce quicker lead times because it greatly reduces the amount of machining required after casting.

Q: Do you need a draft for investment casting?

A: Unlike other casting methods, there are no draft requirements in the investment casting process, allowing for much more accurate dimensional conformance.

Q: What is the weight limit for investment casting?

A: Investment casting is used with almost any castable metal. However, aluminium alloys, copper alloys, and steel are the most common. In industrial use, the size limits are 3 g (0.1 oz) to several hundred kilograms.

Q: Is investment casting as strong as forging?

A: The question of which is better depends on the top priorities for your project. If low cost, exotic alloys, and complex geometries are a priority, casting would probably be the way to go. However, if strength and structural integrity are concerned, forging may be the better option.

Find professional brass investment casting manufacturers and suppliers in China here. Please feel free to buy high quality brass investment casting at competitive price from our factory. For customized service, contact us now.

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