Custom Injection Molding Parts Provider

Custom plastic injection molding services for 3D printing, prototypes and mass production parts.


Obtain customized injection molded plastic parts in within 1-5 working days, comply with CE, ROHS, REACH, certified to ISO 9001, IATF 16949 and Dun & Bradstreet. Free DFM report & mold flow simulation available. PPAP could be offered as per requirements.


We provide customized injection molding solutions, from prototype design to small batch manufacturing, to large-scale production, and offer related metal accessory design and manufacturing for plastic products. Our factory is equipped with medium-sized (100-500T) machines and large 500T-800T machines, allowing us to handle various sizes and complex parts.


We produce 100000 parts per day and provide customized full injection molding services. Both plastic and metal molds are developed and manufactured internally.

precision Metal Injection Molding

Why Choose Our Injection Molding Parts

As a customized plastic injection molding company in China, KENENG provides global customers with cost-effective precision plastic injection molded parts.

KENENG can provide rapid prototyping parts through our plastic injection molds and injection production lines. For rapid prototyping and small batch production, we can provide 3D samples first, which will greatly decrease the cost and delivery cycle of standard molds.

Strict environmental control and robust verification process: 100% full inspection, with a pass rate of over 99%.

Manufacturing environment: Total manufacturing area -10000 square meters, injection molding workshop -800 square meters, assembly workshop -800 square meters, sample room -150 square meters, FA-100 square meters, warehouse -1500 square meters.

Strictly implement 7S management, a fully equipped testing center, and 24-hour shift work. We can provide customers with FAI, CPK, PPK, SST, MTC and other documents.

KENENG has a dedicated internal laboratory. The multi-shift operation in the laboratory supports customer testing needs. The laboratory has a complete set of measuring equipment.

Quality Assurace of Injection Molding Parts
Quality Control of Injection Molding Parts

Case Products of Injection Molding Parts

Injection Molding Parts-4
Injection Molding Parts-5

Injection Molding Process Parameters

We offer flexible injection molding solutions, capable of handling everything from rapid prototyping to large-scale production. With a focus on precision and fast lead times, we ensure plastic parts that meet your custom requirements. Our services also include secondary operations to support your project’s complete needs.

CategoryStarts at 5 business days; most orders are within 15 days.
Lead Time0.5 mm-5 mm walls; 0.5°-2° draft:underuts, ribs, gussets, bosses.
Machines & Mold Types50T-1100T machines; single/multi-cavity & family molds;steel & aluminum molds.
Part Size Range5x5x5mm to 1200x1000x500mm
Tolerances & PrecisionMold cavity tolerance ±0.02 mm; part repeatability±0.1 mm.
Wall Thickness & Features0.5 mm-5 mm walls; 0.5°-2° draft:underuts,ribs, gussets, bosses.
Production VolumesPrototype to mass production (up to 100000+cycles).
Secondary OperationsMold texturing, pad printing, laser engraving, threaded inserts,assembly.

Materials Used for Injection Molding Parts

KENENG’s factory has professional and advanced thermoplastic injection molding equipment, which can provide customers with a full range of customized services for various materials.

Polyethylene

Polyethylene
  • Polyethylene, abbreviated as PE, is a thermoplastic resin obtained by the polymerization of ethylene.
  • Polyethylene resin is an odorless, non-toxic, white powder or granule with a milky white appearance.
  • Low water permeability but high air permeability, not suitable for fresh-keeping packaging but suitable for moisture-proof packaging.
  • The mechanical properties are relatively general, the tensile strength is low, but the impact resistance is good.
  • The heat resistance is not high, and the low-temperature resistance is good.
  • Low dielectric loss and high dielectric strength.
  • It has good chemical stability. It is resistant to acid, alkali, and saline solution at room temperature, but it is not resistant to strong oxidants such as concentrated nitric acid.
  • With low processing temperature and moderate viscosity, it is a kind of plastic with good processing performance.

Polypropylene

  • Polypropylene is a polymer obtained by the addition polymerization of propylene.
  • Polypropylene is a white waxy material with a light and transparent appearance.
  • Widely used in machinery and automobile manufacturing parts, electronic and electrical industrial devices, construction, agriculture, fishery and food industries, textile and printing industries, and other industries.

ABS

ABS
  • Acrylonitrile-butadiene-styrene copolymer (ABS) is a thermoplastic polymer material with good toughness, high strength, and easy processing.
  • Opaque, low weight.
  • High strength and strong impact resistance.
  • Good chemical stability and good electrical properties.
  • Mainly used in the production of wear-reducing and wear-resistant parts, general mechanical parts, transmission parts, and telecommunication parts.

PA

PA
  • PA generally refers to nylon, which is the first synthetic fiber to appear in the world.
  • Polyamide has the characteristics of non-toxicity, lightweight, excellent mechanical strength, good wear resistance, and good corrosion resistance.
  • Polyamide is mainly used for synthetic fibers, and its most prominent advantage is that it has higher abrasion resistance than all other fibers.
  • Widely used to replace copper and other metals, various medical and knitwear production.

Polystyrene

Polystyrene
  • Polystyrene is a colorless and transparent thermoplastic.
  • Ordinary polystyrene resin is odorless, non-toxic, colorless, and transparent particles, and is a glass-like brittle material. Its products have extremely high transparency, and the light transmittance can reach more than 90%.
  • Good electrical insulation performance, easy to color, good processing fluidity, and good rigidity.
  • Good corrosion resistance, poor oxidation resistance, poor solvent resistance.
  • It is often used to make various disposable containers or disposable foam lunch boxes that need to withstand the temperature of boiling water.

Other Materials

For other materials, you can contact us for customization.

Main Types of Injection Molding

Rubber Injection

The molding method of injecting the rubber material directly from the barrel into the model for vulcanization is called the rubber injection method. The advantages of rubber injection molding are short molding cycles, simple processes, high production efficiency, low labor intensity, and excellent product quality.

Plastic Injection

The molten plastic is injected into the mold under pressure, and after cooling and molding, the various plastic parts formed are called plastic injection molding. The most commonly used plastics are ABS, PA, polyethylene, polypropylene, polystyrene, etc.

Workshop and Factory for Producing Injection Molding Parts

Workshop of Producing Injection Molding Parts
Injection molding workshop
Workshop of Injection Molding Parts

Other Services Provided by KENNEG

FAQs about Injection Molding

We typically handle a wide range of ‌thermoplastics‌, including but not limited to:

  • General-purpose plastics‌: PP (Polypropylene), PE (Polyethylene), PS (Polystyrene), ABS (Acrylonitrile Butadiene Styrene), PVC (Polyvinyl Chloride – requires special equipment).
  • Engineering plastics‌: PC (Polycarbonate), PA (Nylon), POM (Polyoxymethylene), PBT (Polybutylene Terephthalate), PET (Polyethylene Terephthalate), PMMA (Acrylic).
  • High-performance plastics‌: PPS (Polyphenylene Sulfide), PEEK (Polyether Ether Ketone), PEI (Polyetherimide) – may require specialized equipment or process parameters.
    Please consult us with specific material requirements.

This depends on our injection molding machines’ ‌clamping force (tonnage)‌ and ‌maximum shot capacity‌. We can produce parts ranging from ‌small precision components‌ (a few grams) to ‌larger parts‌ (several kilograms). Provide the part’s dimensions, weight, and estimated annual volume for evaluation.

We offer ‌one-stop services‌:

  • Mold maintenance & storage‌: We provide maintenance, repair, and storage services for molds.
  • Mold manufacturing‌: We design and produce high-quality injection molds based on your 3D/2D drawings.
  • Mold usage‌: If you have an existing mold (“customer-supplied mold”), we can use it for production if compatible with our machines and in good condition.

MOQ depends on factors like ‌mold cost allocation, material preparation, and cost of changing molds and adjusting machines‌. For new projects, initial production typically has a minimum requirement (e.g., thousands of pieces). For stable ongoing projects, MOQ may be lower. Discuss your specific needs with us.

We implement a ‌comprehensive quality management system‌, including:

  • First Article Inspection (FAI).
  • In-Process Quality Control (IPQC).
  • Final Random/Full Inspection (FQC/OQC).
  • SPC process control for critical dimensions (for mass production).
  • Testing equipment: Calipers, micrometers, projectors, CMM (Coordinate Measuring Machine).
  • Can also conduct hardness tests, abrasion resistance tests, high-temperature aging tests, thermal shock tests, constant temperature and humidity tests, salt spray tests, Elasticity tests, etc.
  • PPAP documentation available upon request.

Our products comply with ROHS, REACH, CE, and CA65 standards. Furthermore, our company is certified to ISO 9001, IATF 16949, and holds a D-U-N-S Number from Dun & Bradstreet.

Product design, research and development, mold design, mold manufacturing, testing and new product introduction. We have our own stamping workshop and spring workshop, and can customize relevant components such as springs, stamping terminals required for injection products for our clients.