CNC Mold Making

What is CNC mold making?

Injection molding is the top choice for mass-producing plastic parts. It heats and injects pelletized material into a pre-made mold, creating the desired shape as it cools and hardens. This efficient process works with various materials, including thermoplastics and thermosetting polymers, making it cost-effective for large-scale production.


What is injection molding?
Injection mold-making is the go-to method for mass-producing plastic parts. The process is streamlined to maximize cost savings and part production. First, pelletized material is placed into a heated container to turn molten. It is mixed with a helical screw to maintain a smooth consistency and to speed up the heating process. The liquid is then pumped – or injected – with a plunger into a premade mold, which shapes the material into the desired form as it cools and hardens. Sometimes another component is inserted into the mold cavity as the material cools in a process called insert molding. This adds another level of complexity to the mold. Most often, injection molding is done with thermoplastics, a plastic made of polymer resins designed to soften or liquify when heated. Less commonly, thermosetting polymers, metals, and glasses are used.

CNC Machine For Lost Foam Casting


What are the applications of CNC machining for injection mold making?


While the tolerances of the finished product may not call for CNC machining, the molds themselves do, especially those with complex inner geometries and contours. CNC machining is the leading production style for mold making. Molds are most commonly machined out of tool steel and stainless steel, but aluminum is also used occasionally. Aluminum doesn’t hold up to the wear and tear of injection molding as well as steel, but it is an inexpensive alternative for small batches of injection molded parts.

CNC Mold Making Products Description
CNC Mold Making
Jiangsu Zhongzhi Automation Co., Ltd

was established in 1999 with a registered capital of more than 40 million. For more than 20 years, we have been adhering to the values of "Continuous research and development, continuous innovation; Manufactured with the most sophisticated equipment; Manage the company with the most professional system; Serve customers with the most enthusiasm". At present, Shanghai Uli Production Base is located in Shanghai Xinzhuang Industrial Zone and Jiangsu Taizhou Zhongzhi Industrial Park. It covers an area of 80,000 square meters and has a construction area of 40,000 square meters. It has an annual production capacity of 6,000 units, which provides a reliable guarantee for Shanghai Uli to produce high quality products.

Professional team

29,000+ experts worldwide
Senior project managers effectively control all aspects of the project

7x24 hours delivery

Located in 27 cities around the world,with 50 delivery centers,providing 200+ languages,7x24 hours delivery capacity,is the best partner for enterprise globalization

5 Axis CNC Machine Factory

At the same time, we have:

Professional and high-level R&D team

Uli has a professional and high-level R&D team. The CAM software, CNC control system, and sophisticated machine design are all striving to achieve the leading level in the industry. In addition, in New Jersey, the United States, we also set up a research and development display base, covering an area of 12 acres and 2,600 square meters.

Rich product structure

We have 20 product series, mainly CNC robots, Five Axis Machining Centers, Four Axis Machining Centers, PTP Processing Centers, Heavy Processing Centers, High-end Processing Centers, Automatic Material Handing Processing Centers, and Pressure Roller Processing Centers.

Strict production process

From the selection of raw materials, welding and casting, shot blasting, annealing, precision machining, sheet metal production, spraying assembly, inspection and other processes are all independent production. What’s more, Uli also adopts Renishaw to enhance the accuracy of the measurement. The entire process is strictly in accordance with the international leading assembly level!

Perfect service system

Pre-sales: We have engaged in 20 years of experience in sales engineers will make a reasonable analysis and evaluation of your application needs which can provide professional escort for your choice; For sale: We will provide training on your process, site location, installation standards, software training, circuit and gas compatibility, etc. After-sales: Since 1999, ULI has set up 36 offices in China. We state that the quality service is at your side, the conscience sales and response within 24 hours.

Our Certificate



Intellectual Property Management System Certification Certificate

Intellectual Property Management System Certification Certificate

IS09001 certification

IS09001 certification

CE certification

CE certification

CNC Mold Making FAQ

Q: What are the benefits of injection mold making?

A: Injection mold making is the best way to mass-produce plastic products and is the predominant method of doing so in the U.S. Thermoplastics are incredibly versatile and cost-effective. They make everything from common household items like cups and combs to highly specialized automotive components. Injection molding is most efficient for high-volume, low-variety shops that produce parts with looser tolerances that might require machining.

Q: What is the difference between CNC machining and molding?

A: With CNC machining, tighter-tolerance parts can be made from a wider range of materials than with injection molding. However, injection molding can produce parts at a much more rapid pace without the need for post-processing - making it ideal for high-volume production.

Q: How were molds made before CNC?

A: Before the advent of CNC machines, manufacturing relied heavily on manual machining and traditional machine tools. The predominant methods included: Manual Machining: This involved the use of hand-operated tools like lathes, milling machines, and drills.

Q: What material is CNC mould made of?

A: CNC machining is the leading production style for mold making. Molds are most commonly machined out of tool steel and stainless steel, but aluminum is also used occasionally.

Q: What is the difference between CNC and casting?

A: Casting offers lower cost per part. CNC milling is used for smaller orders and parts that require tighter tolerances. The defense, medical, aerospace, and automotive industries often require parts that can withstand pressure and have longevity while maintaining the strict tolerances.

Q: What is CNC injection moulding?

A: While injection molding is about filling, CNC machining is about taking away. CNC – which stands for computer numerical control – machining is about using computer-controlled cuts removal material from a solid block a layer at a time.

Q: Are injection molding machines CNC?

A: Injection molding machines may or not be CNC controlled. So CNC is a method of controlling a manufacturing process. Injection molding is a manufacturing process that may or not be CNC controlled.

Q: What is the difference between casting and molding process?

A: The main difference between molding and casting is the use of the material in the process. Casting will typically involve metal, while molding focuses on plastics. In both cases, the melted material goes into a die or mold to create the final form.

Q: What is the process of mold manufacturing?

A: Molding is the process of manufacturing by shaping liquid or pliable raw material using a rigid frame called a mold or matrix. This itself may have been made using a pattern or model of the final object.

Q: What is the difference between plastic machining and injection molding?

A: In plastic injection molding, solid plastic pellets are heated to their melting point and injected into a cavity, called a “mold.” The pellets then cool in the shape of the mold. In precision plastic machining, a larger block of solid plastic is whittled down to the desired dimensions using advanced machinery.

We're professional cnc mold making manufacturers and suppliers in China, specialized in providing high quality products with competitive price. We warmly welcome you to buy cnc mold making made in China here from our factory.

cnc mold making machine, CNC Machine For Lost Foam Casting, cnc mould making machine