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Custom Injection Molding Services ___

✅ Superior Quality: Enjoy unmatched precision and reliability with our expertly crafted injection-molded parts tailored to your needs.

Tailored Solutions: Leverage our customizable services designed specifically to meet your unique production requirements.
Efficient Delivery: Benefit from rapid turnaround times and competitive pricing that help keep your projects on schedule and within budget.

What is 

Custom Injection Molding?

The principle of injection molding is to add granular or powdery raw materials into the hopper of the injection machine, and the raw materials are heated and melted into a flowing state. Driven by the screw or piston of the injection machine, the molten plastic flows into the mold cavity through the nozzle and the pouring system of the mold, hardening and shaping in the mold cavity. It is a versatile and widely used manufacturing process that enables the production of high-quality injection molding parts or injection molded products in large volumes.
U-Need offers end-to-end solutions for the efficient production of injection mold and complex injection molding products with excellent dimensional accuracy.

Injection Molding Materials _____

We supports a wide range of materials for injection molding, most commonly thermoplastic and thermosetting polymers. Material selection depends on the desired properties, part requirements, and application.
Here are ten commonly used materials and their key characteristics:

MATERIALS

  • PMMA (Acrylic)
     
    Transparent, impact-resistant, and weather-resistant.
     
    1. Injection Molding PMMA
  • ABS

    ABS

     
    Tough, rigid, and resistant to impact and heat.
     
    2. ABS Injection Molding
  • PA (Nylon)

     
    High strength, abrasion-resistant, and excellent mechanical properties.
     
    3. PA Injection Molding
  • PC

    PC

     
    High impact strength, transparency, and heat resistance.
     
    4. PC injection molding
  • PE

    PE

     
    Versatile, lightweight, and chemical-resistant.
     
    5. PE injection molding
  • POM

    POM

     
    Low friction, excellent dimensional stability, and high rigidity.
     
    6. POM delrin injection molding
  • PP

    PP

     
    Lightweight, chemical-resistant, and good fatigue resistance.
     
    7. PP injection molding
  • PS

    PS

     
    Rigid, transparent, and easily processed.
     
    8. PS injection molding
  • TPE

    TPE

     
    Flexible, elastic, and resistant to wear and tear.
     
    9. TPE injection molding
  • TPU

    TPU

     
    Flexible, abrasion-resistant, and good impact strength.
     
    10. TPU injection molding

Surface Finish in Machining of Injection Molded Products _______

Achieving the desired surface finish in injection molded products is crucial for both functionality and marketability. We balance cost, performance, and aesthetic requirements to meet specific application needs.
Method Description Features and Applications
Bronzing Mainly used for silver or gold signs, it is a special printing process without ink. It uses a stencil installed on hot stamping machines, applying specific pressure and temperature to press the printed matter and the hot stamping foil together in a short time, enabling the transfer of graphics. This printing method is widely used in almost all plastic processing industry due to its characteristics of being anti-scratch, wear-resistant, peel-resistant, and decorative.
Pad printing Pad printing is an indirect concave printing technology that has become the primary method for printing and decorating the surface of various objects. With pad printing, a soft (rubber-like) silicone tip is pressed on the ink-coated print block and then on the products’ surface. Suitable for small area printing on irregular substrates (such as instruments, electrical parts, toys, etc.)
Silk-screen printing The basic principle of silk-screen printing is: Partial mesh of the screen printing plate can penetrate the ink and leak to the substrate; the rest of the mesh on the printing plate is blocked and cannot penetrate the ink, forming a blank on the substrate. This method can be used for flat and cylindrical surfaces with large area printing.
Water transfer printing Water transfer printing is a kind of printing in which the transfer paper or plastic film with color patterns is hydrolyzed by water pressure. Due to the excellent tension of the water coating film, it is easy to wrap around the product surface to form a graphic layer, and the product surface gets an entirely different appearance, just like spray paint. It can form a seamless layer of simulated natural or desired texture colors on the products with concave and convex complex appearances. Because the product surface does not need to be in contact with the printing film, it can avoid damage to the product surface and its integrity.
UV transfer printing It uses the non-stick properties of the UV transfer glue and metal to transfer the ultra-thin button effects of various mobile phones to PET, PMMA, or PC sheets through the UV transfer process, to make a wide variety of effects, including wire drawing pattern, sandblasting patterns, leather pattern, 3D surface, matte surface, highlight surface effect, etc. With the advantages of being ultra-thin, high hardness, high wear resistance, high solvent resistance, and beautiful appearance, etc., it is used in the 3C industry, various remote control button, appliance control panel components, ceiling decorative pieces, and so on.
IML(ln Mold Labelling) The surface of the IML is a hardened transparent film with a printed pattern layer in the middle and a plastic layer on the back. Because the ink is sandwiched in the middle, it can prevent the products’ surface from being scratched and is anti-friction, and also can keep the color bright for a long time, and it is not easy to fade. The film can express multiple colors. The pattern and color can be changed at any time during production. It has excellent scratch resistance. It's flexible and suitable for multi-variety and small-scale production. IML is developing in various innovative directions, such as antibacterial, automatic repair of surface scratches, real cloth in-mold injection, pearl effect, 3D texture, etc.
Spray paint The paint layer structure generally consists of a primer, pigmented layer, and protective topcoat, where the pigment paint layer is thinner than the topcoat. Influencing factors such as paint viscosity, compressed air pressure, spray quantity, and spray speed is crucial to the surface quality of the workpiece.  

Injection Molding Services from U-Need

At U-Need, we specialize in injection molding and offer a comprehensive range of services to meet your manufacturing needs, including but not limited to:
Injection molding mold design assistance and engineering support
Material selection guidance
Injection mold fabrication
Rapid injection molding prototyping
Quality assurance and inspection
Efficient production and on-time delivery
With our expertise and state-of-the-art facilities, we strive to deliver exceptional plastic injection molding solutions tailored to your specific requirements.
FAQs _____
  • How does Injection Mold work?

    The process typically involves the following steps:
    1. Clamping: The two halves of the mold, the stationary side, and the moving side are securely closed together under high pressure. This creates a sealed mold cavity.
    2. Injection: Molten material, usually in the form of thermoplastics, is injected into the mold cavity through a injection molding nozzle. The material fills the cavity, taking its shape and conforming to the mold's contours.
    3. Cooling: After the material is injected, it is allowed to cool and solidify within the mold. Cooling time depends on the material and part design.
    4. Ejection: Once the material has solidified, the mold is opened, and the part is ejected using injection molding ejector pins or other mechanisms.
    5. Cycle Repeat: The process is repeated for subsequent parts, allowing for high-volume production.
     
  • What is the life of a plastic mold?

    Sample~1000,000 times

  • What is the commonly used materials in the cavity?

    P20, H13 steel, NAK80, S136, 738H, etc.

  • What are the Applications of Injection Molded Parts and Injection Molding Products?

    Injection molding applications can be found in various industries, including:
    1. Injection Molding Automotive Parts: Interior and exterior injection molding components, injection molded electrical connectors, and under-the-hood parts.
    2. Injection Molded Consumer Products: Household appliances, packaging, toys, and injection molding electronics.
    3. Medical Injection Molding: Injection molding medical devices, disposable items, and diagnostic equipment.
    4. Aerospace Injection Molding: Interior components, connectors, and structural parts.
    5. Industrial Injection Molding: Custom injection molded enclosures, injection molded gears, injection molded knobs, and machinery components.
     
  • When is Injection Molding Used?

    Injection molding is commonly used when:
    1. Large quantities of parts are required.
    2. Complex part geometries need to be achieved.
    3. High precision and tight tolerances are necessary.
    4. Repeatable and consistent part quality is essential.
    5. Cost-effective production is needed for long production runs.
     
  • How to Reduce Injection Mold cost?

    How much does an injection mold cost? It depends on the mold itself, but you can consider the following strategies to reduce injection mold costs :
    1. Simplify the part design to minimize complexity and tooling requirements.
    2. Optimize the injection mold design for easier manufacturing and reduced material waste.
    3. Collaborate with experienced mold designers and manufacturers who can suggest cost-saving solutions.
    4. Utilize cost-effective materials that meet the required specifications.
     
Injection Molding
Resources _____
  • How Does CNC Machining Differ From Traditional Machining Methods? (OEM Buyer's Guide)

    2026-02-08

    Understand how CNC machining differs from traditional machining in precision, cost, speed, and scalability. Learn when to choose each method and how an integrated OEM partner can support metals, plastics, silicone, and stamping from prototype to production. Read More
  • How To Choose The Best Sheet Metal Material for Your Project?

    2026-02-12

    Learn how to choose the best sheet metal material for your project. Compare stainless steel, aluminum, galvanized steel, cold rolled steel, and copper by strength, corrosion resistance, surface finish, and cost to support reliable, cost‑effective designs. Read More
  • How Precise Is CNC Machining Compared To Other Manufacturing Methods in 2025–2026?

    2026-02-11

    CNC machining delivers tighter tolerances and better repeatability than manual machining, 3D printing, and standard injection molding. This article explains typical tolerance ranges, key process differences, design tips, and how to choose the right manufacturing method for precise OEM parts. Read More

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U-Need Precision Machinery Co., Ltd.
  +86 0769 23225585
 +86 15916761371
  contact@uneedpm.com
  Room 401-1, Building 4, SongHuZhiGu Research Center, No.6 Minfu Road, Liaobu Town, Dongguan City, Guangdong Province, China
523425

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