Renjie
CNC Machining

Custom Plastic Injection Molding Services

As a premium precision plastic iniection molding manufacturer in USA operating from china, we deliver end-to-engservices--from concept to finished mold,ensuring your products reach the market faster with uncompromising quality.

◉Part Production From1-1,000,000+ Parts

◉Over 100 Thermoplastics

◉Rapid Tooling: 15–30 Days

CNC Machining CNC Milling CNC Turning Rapid Prototyping Laser Cutting Sheet Metal Fabrication Plastic Injection Molding Surface Finishing

Plastic Injection Molding Services

General Purpose Plastics

General-Purpose Plastics

  • PP (Polypropylene), PE (Polyethylene), ABS (Acrylonitrile Butadiene Styrene Copolymer), PS (Polystyrene), PVC (Polyvinyl Chloride).
  • These materials feature high production volumes, broad applications, and low costs, making them suitable for various everyday uses.
  • For instance, PP offers excellent heat and chemical resistance, while ABS is easy to process.
Engineering Plastics

Engineering Plastics

  • PA (Nylon), PC (Polycarbonate), POM (Polyoxymethylene), PBT (Polybutylene Terephthalate)
  • High mechanical strength, excellent heat resistance, superior wear resistance, and outstanding dimensional stability.
  • Suitable for high-strength, wear-resistant, or precision components.
Elastomeric Plastics

Elastomeric Plastics

  • TPE (Thermoplastic Elastomer), TPU (Thermoplastic Polyurethane).
  • Combines the characteristics of rubber and plastic, offering flexibility and elasticity.
  • TPU typically offers wear and oil resistance, suitable for manufacturing elastic parts or seals.

Advanced Plastic Injection Molding Services

Treatment Category Treatment Technology Main Purpose/Effect Key Points
Mold Surface Treatment Polishing Obtain high gloss and mirror effect, facilitating demolding. Meet SPI (Society of the Plastics Industry) standards.
Texture (e.g., MoldTech) Form textures like leather, geometric patterns, and wood grain, enhance touch, and hide scratches and mold lines. Require professional design and processing.
Engravings Create permanent graphics such as brand logos, marks, and scales on parts.
Secondary Treatment of Plastic Parts Annealing Eliminate internal stress and reduce the risk of product cracking and deformation. Realized through heating and slow cooling.
Degreasing Remove oil stains to provide a clean surface for subsequent painting, printing, or bonding. Use alkaline aqueous solution or surface agents.
Electrostatic Dust Removal Remove dust adsorbed by static electricity to ensure coating quality, especially suitable for mass production.
Wetting and Roughening Improve plastic surface tension and increase coating adhesion. Commonly use chromic acid/sulfuric acid mixture or solvent treatment.
Screen Printing/Pad Printing Print patterns and texts on the product surface.
Heat Transfer Printing Transfer complex patterns with good durability.
Electroplating Endow with metallic luster and enhance wear resistance and corrosion resistance, commonly seen in high-end consumer goods.

Why Use Renjie Plastic Injection Molding Services?

1

Industry Experience and Reputable Track Record

Successfully delivered high-precision molds for aerospace, automotive connectors, medical devices, and more. Product accuracy and stability have been consistently validated by clients over the long term.

2

Comprehensive Quality and Delivery Control

Certified under ISO 13485 and other professional standards. Critical medical molds meet the stringent requirements of the medical device industry.

3

End-to-End Service System

Delivering end-to-end solutions from collaborative product development and mold design/manufacturing to injection molding and final assembly, minimizing coordination time and risks across multiple suppliers

Advantages of Plastic Injection Molding

One-step molding

Complex shapes, precise dimensions, and plastic parts with metal or non.metal inserts can be produced in a single injection. The process is simple and energy-efficient.

Wide applicability

Almost all thermoplastics can be molded by this method, except forfluoroplastics, some thermosetting plastics with good flow properties can also be injectionmolded.

Stable product quality

High appearance quality and dimensional accuracy make it suitable forconsistent mass production.

Start with a Free, No-Obligation Quote

ISO-certified precision machining with transparent pricing. Upload your drawings and receive expert manufacturing guidance within one business day.

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CNC Machining

CNC Machining FAQs

  • Q1: What factors affect the cost of a plastic injection mold?

    A:The cost of a plastic injection mold depends on several factors, including the complexity of the part, mold size, number of cavities, type of plastic material, required surface finish, and expected production volume. Shorter lead times or high-precision requirements can also increase costs.

  • Q2: Can injection molds produce complex shapes?

    A:Yes,A plastic injection mold forms a cavity by combining the moving and fixed mold halves, allowing the production of complex plastic parts. For features like side undercuts, holes, or ribs, molds can include side cores, inserts, or ejector pins to achieve proper molding. With a suitable design and mold structure, injection molds can produce precise, intricate plastic components.

  • Q3: How many parts can a plastic injection mold produce?

    A:There is no fixed number of parts that a single plastic injection mold can produce, it is determinedthrough the following steps: 1. Preliminary selection of cavity number based on part weight, required precision, and materialflow properties. 2. Verification of whether the injection molding machine's clamping force and mold plate size canaccommodate the selected cavities. 3. Final determination by balancing mold cost with production efficiengy. As a result, lightweight, high-precision small parts can have dozens to over a hundred cavities, while large, complex parts typically only have 1-8 cavities.

  • Q4: Can you make small or prototype runs using injection molds?

    A:Yes,Our injection molding services can accommodate small or prototype runs. Rapid prototyping molds or low-volume molds allow you to test designs, validate parts, and fine-tune production before committing to full-scale manufacturing. This approach reduces risk and accelerates time-to-market.

  • Q5: What is the typical lead time for plastic injection molds?

    A:Our lead times depend on mold complexity and production requirements. Simple molds can be delivered in 2–3 weeks, while complex precision molds typically require 4–8 weeks. Working with a reliable premium plastic injection molding manufacturer ensures timely delivery without compromising quality.

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