door parts

How do I choose the right investment casting company for my project?

Choosing the right investment casting company for your project is crucial to ensure the success and quality of your investment casting needs. Here are some steps you can follow to make an informed decision:

Define your project requirements: Clearly outline your project’s specifications, including the type of material, dimensions, tolerances, and any specific features or complexities. This will help you assess whether a casting company can meet your specific needs.

Research potential casting companies: Look for investment casting companies that have experience and a good reputation in the industry. Search online, check industry directories, and ask for recommendations from colleagues or professionals in your field. Heda Castings started exporting precision casting parts since 2004 and have built long-term business relationships with clients from all over the world.

Evaluate their expertise and capabilities: Review the company’s website, brochures, and any available documentation to assess their expertise and capabilities. Look for information on their experience with similar projects, the range of materials they work with, and the types of industries they serve. Heda-castings offers investment castings in most kinds of material such as alloy steel, stainless steel, brass and more. Our clients are from various of industries including automotive, medical, energy, construction, homeware, household electrical appliances, railway, machinery, defense and so forth.

Quality and certifications: Check if the company has appropriate certifications, such as ISO 9001 or other industry-specific quality standards. These certifications indicate that the company follows established processes and maintains high-quality standards. Our foundry is a ISO9001-2015 certificated factory.

Request samples and references: Ask the casting companies for samples of their previous work to evaluate the quality of their castings. Additionally, request references from their existing clients and contact them to inquire about their experience working with the company.

Capacity and production capabilities: Determine whether the casting company has the capacity to handle your project. Consider factors such as production volume, lead time, and their ability to scale up production if needed. Our annual production capacity is more than 4,000 tons.

Technical support and collaboration: Assess the level of technical support and collaboration the casting company can provide. A reliable company should be able to offer guidance and expertise throughout the design and manufacturing process, suggesting improvements and optimizations where necessary. Our engineers can offer design and engineering support. We have experienced engineers who can review your designs, provide feedback, and offer suggestions for improving manufacturability and cost-effectiveness.

Pricing and affordability: Obtain quotes from multiple casting companies to compare pricing. However, remember that choosing the lowest-cost option may not always yield the best results. Consider the overall value, including quality, expertise, and reliability, along with the pricing.

Communication and responsiveness: Evaluate the communication skills and responsiveness of the casting company. Timely and clear communication is essential for a successful collaboration. Our sales team has good English skill and professional knowledge of investment casting.

Supply chain management: Consider how the casting company manages its supply chain. They should have established relationships with reputable material suppliers to ensure the quality and availability of materials. Efficient supply chain management can also contribute to shorter lead times and reduced costs. Our factory is close to Shanghai port and Ningbo port, we have our own exporting company in Shanghai and we have very reliable partners in inland transportation and international logistics field, in order to ensure our parts can be shipped or air world wide safe and in time.

Visit the facilities (if possible): If feasible, arrange a visit to the casting company’s facilities to see their operations firsthand. This will give you a better understanding of their capabilities, quality control processes, and the overall working environment. We welcome all the clients to pay a visit to our foundry in China.

By following these steps, you can make an informed decision when selecting an investment casting company that aligns with your project requirements and can deliver high-quality castings within your desired timeframe.

Please feel free to contact us and we look forward to building a long-term business relationship with you.

investment casting gear wheel

What industries commonly use investment casting?

Investment casting, also known as lost-wax casting, is a versatile manufacturing process used in various industries. Some of the industries that commonly use investment casting include:

Aerospace: Investment casting is widely utilized in the aerospace industry for manufacturing complex and high-precision components such as turbine blades, engine parts, and structural components. The process enables the production of intricate shapes and allows for the use of lightweight materials.

Automotive: Investment casting finds application in the automotive industry for producing components like engine parts, exhaust manifolds, intake manifolds, suspension components, and other precision parts. The process offers design flexibility, enabling the production of intricate geometries and reducing the need for machining.

Medical: Investment casting plays a crucial role in the medical industry for manufacturing surgical instruments, orthopedic implants, dental components, and other medical devices. The process allows for the production of complex shapes with high accuracy and surface finish.

Energy: Investment casting is employed in the energy sector, particularly in the production of components for gas and steam turbines, nuclear power plants, and renewable energy systems. The process facilitates the creation of intricate and heat-resistant parts for these applications.

Defense: The defense industry utilizes investment casting for producing various components, including weapon systems, military vehicle parts, and aircraft components. The process enables the production of strong, lightweight, and complex parts critical to defense applications.

Jewelry: Investment casting has long been used in the jewelry industry to create intricate and detailed designs. It allows jewelers to produce complex shapes and patterns with high precision, offering a versatile method for creating custom jewelry pieces.

Art and Sculpture: Artists and sculptors utilize investment casting to bring their creative ideas to life. The process enables the replication of intricate details and allows artists to work with a variety of metals, providing them with the freedom to explore different forms and textures.

These are just a few examples of industries that commonly employ investment casting. However, the versatility of the process extends to other sectors as well, where complex shapes, precision, and repeatability are desired in the manufacturing of metal components.

lost wax casting part

What are the advantages of investment casting over other casting methods?

Investment casting, also known as precision casting or lost wax casting, offers several advantages over other casting methods. Here are some of the key advantages of investment casting:

Design flexibility: Investment casting allows for the production of complex and intricate shapes with high dimensional accuracy. It offers design flexibility, enabling the creation of parts with thin walls, fine details, and internal features that would be difficult or impossible to achieve with other casting methods.


Excellent surface finish: Investment casting results in parts with a smooth surface finish, reducing the need for additional machining or finishing operations. This can save time and costs in the production process.

Wide material selection: Investment casting supports a broad range of materials, including various alloys, stainless steel, carbon steel, tool steel, and superalloys. This versatility allows manufacturers to choose the most suitable material for the specific application requirements.

Cost-effective for small to medium production runs: Investment casting is particularly advantageous for small to medium production runs. It offers cost efficiencies in terms of material usage, as it minimizes waste compared to other casting methods. Additionally, the ability to consolidate multiple components into a single investment casting reduces assembly and labor costs.

High dimensional accuracy and repeatability: Investment casting yields parts with tight tolerances and high dimensional accuracy. The use of precision molds and wax patterns ensures consistent replication of intricate details, resulting in parts that meet precise specifications.

Wide size and weight range: Investment casting can produce parts ranging from a few grams to several kilograms in weight. This versatility makes it suitable for a wide range of applications across various industries.

Reduced need for secondary operations: Investment casting can often produce near-net-shape parts, reducing the need for extensive post-casting machining or other secondary operations. This can save time, costs, and material waste.

Improved part integrity: The investment casting process minimizes porosity and internal defects, resulting in parts with enhanced mechanical properties, structural integrity, and overall reliability.

Overall, investment casting offers the advantage of producing complex, high-quality parts with excellent surface finish and dimensional accuracy, making it a preferred choice for various industries, including aerospace, automotive, medical, and more.


Steel and SS investment casting car parts

Shanghai Heda Castings is a professional manufacturer and exporter of investment casting (lost wax casting) in China, we supply various of investment casting auto parts, for both passenger vehicles and commercial vehicle.

Investment casting, also known as lost wax casting, is a metal forming process that involves making a wax model of the part to be produced, coating it with a ceramic shell, and then heating the shell to remove the wax and harden the ceramic. Molten metal is then poured into the ceramic mold to create the final part. Investment casting is a precise and repeatable process, which makes it ideal for producing high-quality auto parts with complex geometries and tight tolerances. The use of steel and stainless steel in investment casting is particularly beneficial in the production of auto parts due to their strength and resistance to corrosion. Steel is a durable and cost-effective material that is commonly used for engine and drivetrain components, as well as for suspension and braking system parts. Stainless steel, on the other hand, is known for its high corrosion resistance, which makes it ideal for use in exhaust system components and other parts that are exposed to high heat and corrosive gases.


Some examples of auto parts that are frequently made using these techniques include:

Engine components: Steel and stainless steel investment casting is often used to produce engine

components such as cylinder heads, valve guides, valve bodies, rocker arms, and connecting rods.

Suspension components: These techniques are used to produce parts such as ball joints, control arms, and steering knuckles.

Transmission components: Steel and stainless steel investment casting is used to produce parts such as transmission cases, gears, and shift forks.

Brake components: Parts such as brake calipers and brackets are commonly made using steel or stainless steel investment casting.

Exhaust system components: Steel and stainless steel investment casting is used to produce parts such as exhaust manifolds, turbine housings and mufflers.

Fuel system components: Fuel injectors, fuel rails, and carburetor bodies.

Body and interior parts: Door handles, mirror brackets, and seat brackets.

In addition to these components, steel and stainless steel investment casting can be used to create a variety of other parts for the automotive industry, such as brackets and housings.

Steel investment casting is typically used to create parts that require high strength and durability, while stainless steel investment casting is often used for parts that require corrosion resistance and/or a high level of surface finish. In summary, investment casting is a versatile and precise metal forming process that is well-suited for the production of auto parts made from steel or stainless steel. The use of this process can result in high-quality parts with complex geometries, tight tolerances, and excellent strength and corrosion resistance.

investment casting wax injection

Which machineries are needed in an investment casting foundry?

Investment casting is a precision casting process that produces high-quality metal parts with complex shapes and fine details. Investment casting equipment are used to produce these parts, we suggest you to read the processes of investment casting first in order to understand why these machineries are needed. In this article, we’ll explore the various types of investment casting machineries and their functions.

Wax Injection Equipment: The wax injection equipment is used to inject molten wax into the steel or AL mold to form the wax pattern. This machinery includes a wax tank, wax injection nozzle, wax injector, and wax pattern assembly. The equipment should be able to accurately control the temperature and pressure of the wax injection process to ensure consistent and high-quality wax patterns.

Ceramic Shell Production Equipment: The ceramic shell production equipment is used to create the ceramic shell that encases the wax pattern. This machinery includes a shell building station. The equipment should be able to create a strong and durable ceramic mold that can withstand the high temperatures and pressure of the casting process.

Melting and Pouring Equipment: The melting and pouring equipment is used to melt the metal and pour it into the ceramic mold. This machinery includes a furnace, a crucible, a ladle, and a pouring system. The equipment should be able to accurately control the melting temperature and pouring rate to ensure that the metal flows smoothly into the mold and fills all the intricate details of the wax pattern.

Cleaning and Finishing Equipment: The cleaning and finishing equipment is used to remove the ceramic shell and any residual wax from the cast metal part. This machinery includes a shell breaking machine, a shot blasting machine or a sandblasting machine and a grinding machine. The equipment should be able to provide the desired surface finish and dimensional accuracy of the final part.

Quality Control Equipment: The quality control equipment is used to verify that the final part meets the required specifications. This machinery includes various measuring tools such as a coordinate measuring machine (CMM) or a 3D scanner, a surface roughness tester and a metal composition analyzer. The equipment should be able to accurately measure the dimensions, chemical composition of the metal and surface finish of the final part to ensure its quality.

Other than the machineries mentioned above, an investment casting foundry still needs some other equipment such as dewaxing furnace, cutting machine, grinding machine, dust remover machine and more. Investment casting machineries are crucial components of the investment casting process. They play a significant role in determining the quality and consistency of the final product. By using high-quality machineries and maintaining them properly, investment casting foundries can produce high-quality metal parts that meet the demanding requirements of various industries.

investment casting gun muzzle

An investment casting topic with ChatGPT

We are making some gun muzzles for a US client, we thought it could be interesting to try out ChatGPT on this topic and we found it’s really amazing and it can be a significance step for AI industry and many related industries in the future.

Here is our dialogue:

Heda: How is a gun Muzzle made?


The process of making a gun muzzle typically involves several steps. Here is a general overview of how it is done:

  1. Raw Material: The raw material used to make a gun muzzle can be made of various metals, including steel, stainless steel, or titanium.
  2. Cutting: The raw material is cut to size, typically using a computer numerical control (CNC) machine, to create the basic shape of the muzzle.
  3. Bending: The cut piece of metal is then bent into the proper shape using a press or a hydraulic press.
  4. Threading: The interior of the muzzle is then threaded to match the thread pattern on the gun barrel.
  5. Finishing: The exterior of the muzzle is then finished to the desired specifications, which can include sandblasting, polishing, or Parkerizing.
  6. Heat Treating: The muzzle may be heat-treated to increase its strength and durability.
  7. Testing: The finished muzzle is then tested for accuracy and fit on a test gun.

The specific process used to make a gun muzzle can vary depending on the type of firearm it is being used for and the manufacturer’s specific design requirements.

Heda: We think gun Muzzle can also be made by investment casting process.

ChatGPT: Yes, you’re correct! Investment casting is another method that can be used to make gun muzzles. Investment casting, also known as lost-wax casting, is a process where a wax pattern is created, coated in a ceramic shell, and then heated to remove the wax and harden the shell. Molten metal is then poured into the ceramic mold to create the final product. Investment casting allows for a high degree of precision and detail, making it a popular method for producing complex parts such as gun muzzles. The process can produce muzzles with very fine surface finishes and intricate internal features that would be difficult or impossible to produce using other methods.

Heda: But you didn’t mention it in your first answer.

I apologize for that oversight. Thank you for pointing it out. Yes, investment casting is another process that can be used to make gun muzzles, and it’s an important method to consider in the manufacturing of firearms components.

Baitcasting reel parts

Investment castings we have made

Products made by investment casting technique can be seen everywhere in our life, in the past ten years, we supplied more than one thousand all kinds of investment castings to our customers from all over the world, in weight from 7g to 20kg, in material includes carbon steel, stainless steel and all kinds of alloy steels. Long-term cooperations were built based on stable quality of our products. Here are some investment castings we have done:

china investment castings

Architectural hardware

Hinges for reservoir

Hinge (window & door, reservoir)

Lock parts

Glass spider fittings, Glass spigot

Bathroom hardware

Handles (cookware, window & door)

Floor drain

Tap and faucet

Mechanical equipment

Parts of lifting and height safety equipment

Floor drain

Agricultural machine parts

Food machinery parts

Knitting machine parts

Printing machine parts

Slaughtering equipment parts

Medical equipment parts



Grinding disc kitchen waste disposer


investment casting parts

Clippers for sheep shearing

Paint spray gun

Valves and Pumps


Valve parts

Pump parts

Transportation parts

Parts of fast train breaking system

sharp nose pliers
Sharp nose pliers

Ship equipment parts (oil ship, yacht)

Various auto parts


Underwater spotlight shields

Muzzle device

Dental forceps

Surgical knife handle

Baitcasting reel parts

investment casting lock parts zinc plated

Investment casting lock parts for door and window

Lock parts, components of window and door are the most used precision casting products in construction industry, including lock mechanisms, lock keeper, hinges, handles and more. These lock parts are usually small in size, weight between 10 to 250g, and very precise in sizes, with high tolerance requirements, important linear dimensional tolerances are typically +/-0.15mm, for critical areas the tolerance can be +/-0.03mm, and the surface finish of visible area must be very smooth. Lock parts can be produced by several different production methods such as zinc die casting, investment casting, MIM and so forth, but only investment casting offers the best mechanical performance and the best performance/price ratio, and provides the best safety performance and longest service life for window and door.

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