Cast Molding Service


Get a quote for tooling and the first batch production.


DFM report will be provided for production confirmation if needed.


You get free samples per part for your approval.


Your parts go into production after samples are approved.

Quality Control

We use the sample to verify future orders and provide QC checks.


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what is urethane casting

What is Cast Molding?

Cast molding refers to the processing process in which liquid raw materials are poured into a mold and cooled and solidified at room temperature. Zhongde has many years of casting experience. Our experienced engineers can accurately analyze whether the product is suitable for casting products according to the product structure.


For example, Zhongde will offer and recommend reusable metal casting molds for customers who need mass production of making identical products. The reusable metal casting molds are useful since they can be used repeatedly. Zhongde provides casting for different metal casting molds with 3D printing such as silicone casting molds, steel casting molds, aluminum casting molds, and brass casting molds.

Cast Molding Molds Making and Tooling Services

Zhongde makes all the molds in-house. We have been insisting on developing our own molds for many years, meanwhile, introducing fully automated equipment. Our professional engineer will help to improve the mold design. In addition, our custom die mold is lifetime guaranteed and machined from high-grade metal. 

  • Rapid Tooling: Mold working life time up to 20.000 runs. Short machined time.
  • Production tooling: Traditional molds, used for mass production.
  • Multi Cavities Moulds: Moulds can produce more than one part per cycle, used to increase the production rate.
  • Family Moulds: Moulds produce two or more different parts per injection cycle, the parts should be of the same material and color.
  • Mold Material: Steel P20, H13, S136, 2316, 2344, 083,718H, SKD618, etc.
  • Mold Type: Family molds, single and multi-cavities molds.
  • Mold Storage: 3 years inactivity.
  • Mold Remachining: We can re-machine the molds if there are any changes required, on the basis of mold structure.
  • Mold Warranty: Lifetime warranty on production molds.
  • Maximum Dimensions: 2500mm*2000mm

Cast Molding Size Chart

The below table shows the size of the Casting Molding parts we usually make. If you need a larger size, we can also help you achieve it.

Size Metric Inch
Length 2500 98.4
Width 2000 78.7

Cast Molding Materials

Cast molding may have a more limited range of material options compared to injection molding. Below list is the of general materials for cast molding. However, our expert team can work with you to modify the material if you have specific project requirements.

  • PU | Polyurethane
  • LSR | Liquid Silicone Rubber

  • MC Nylon
cast molding materials

Cast Molding Surface Finishing

Cast molding surface finish is critical to a successful part design and it is used for aesthetic and functional reasons in injection molded parts for engineering products. The surface finish improves the look and the feel of a product as the perceived value and quality of the product increase with a suitable surface finish.

Different grades of surface finishing chart.

GlossyA-grade finishes are made using a diamond buffing process and yield shiny and glossy surfaces on injection molded parts.Get A Quote
Semi-glossyB-grade finishes use grit sandpaper to produce parts with a slightly rougher finish than grade A parts. Custom molded plastic parts that undergo B-grade finishing have a matte surface texture.Get A Quote
MatteC-grade finishes use grit sanding stones to produce a rough, uneven surface. Injection plastic parts that undergo C-grade finishing have a matte surface texture.Get A Quote
TexturedD-grade finishes use grit and dry glass beads or oxide to produce a very rough textured finish. Depending on the type of material used, products can have a satin or dull finish.Get A Quote
our quality promise

Our Quality Promise

Zhongde is committed to providing quality products that meet or exceed the needs of our customers through continuous improvement.


Strictly follow the confirmed drawings or samples to produce. If there is any deviation, our company will replenish to our customers to make up for the loss.

Advantages of Cast Molding

Cast molding makes high-quality prototype components using two-component polyurethane resins and silicone molds.


The Advantages include as below:

  • Low-volume production
  • High accurate production
  • A wide variety of finish options
  • Rapid turnaround on parts
  • Durability for maximum wear and strength

Difference Between Cast Molding and Injection Molding

Cast molding and injection molding are two different manufacturing processes.

Cast molding involves pouring molten material into a mold cavity and allowing it to cool and solidify, taking the shape of the mold. It is suitable for producing large, complex parts with intricate details and varying wall thicknesses. Cast molding offers design flexibility but may have longer production times and limited material options.


Injection molding, on the other hand, injects molten material into a mold under high pressure. It allows for high-volume production of parts with precise dimensions and complex geometries. Injection molding offers faster cycle times, a wide range of material choices, and tighter tolerances compared to cast molding. However, it requires upfront tooling costs and is better suited for mass production.

The Cast Molding Process

casting process

the cast molding process typically involves the following steps:

  1. Pattern creation and mold preparation: Create a pattern and encase it in a mold material, such as sand or silicone, forming the mold cavity.
  2. Molten material pouring: Heat the mold, pour molten material (metal, plastic, or resin) into the cavity, and allow it to cool and solidify.
  3. Mold opening and part removal: Open the mold and remove the solidified casting, which takes the shape of the mold cavity.
  4. Finishing and post-processing: Trim, sand, polish, or apply surface treatments to the casting for desired appearance and dimensions.
  5. Inspection and quality control: Thoroughly inspect the finished casting for defects, ensuring it meets required specifications and quality standards.

Note: The specific steps and techniques may vary depending on the material being cast and the complexity of the project.

Zhongde-Your Cast Urethane Manufacturer

Zhongde is one of the professional cast urethane manufacturers. The polyurethane casting process starts with 3D printing of the main pattern using silicone rubber molds. Polyurethane casting is a fast and cost-effective method to produce end-use plastic parts on a small to medium scale. Zhongde is proficient in various materials and formulas with the suitable ability to execute the casting process efficiently and with the quality promised by our technology.

Let's Start A New Project Right Now!

Cast Molding Parts

FAQs of Cast Molding Service

What is the expected lead time for the casting molds?

The lead time varies depending on factors like mold design, material availability, and production schedule. We aim to provide an estimated timeline based on your project requirements.

Can you provide samples or prototypes before full production?

Yes, we offer sample production or prototyping services to ensure the final product meets your expectations before proceeding with full-scale production.

Can you accommodate design modifications or revisions?

Yes, we can accommodate design modifications within the scope of the project. Our team works closely with you to ensure any necessary changes are implemented effectively.

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