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Plastic Injection Molding

IQ-Enterprises (IQE) is a premium manufacturing firm, located in Indianapolis, Indiana, and in China. Established in 2004, IQE supplies high quality and low cost custom plastic injection molding parts and plastic injection mold. Injection molded parts are handled with great care to meet required dimensions and surface finish. IQE also offers engineering services and secondary operations, such as: painting, printing, ultrasonic welding, etc. We also provide custom plastic extrusion.

Communication, Quality, On-Time Delivery: In the US, we handle your project from beginning to end. We communicate design ideas, and convert all standards via bilingual Engineers to help work through all other challenges to make sure we exceed your quality, service and financial goals. Quality, on-time delivery and customer satisfaction is the goal of our service. IQE’s quality management team in China checks the product quality at each stage in the production process to make sure the product meets the specifications before shipping. Based on request, we deliver your product to your dock or may stock your product in North America. ISO 9001-2000 certified.

Plastic Injection Molding Samples

Plastic Quick Connector Automatic Shutoff
Painted Plastic Injection Parts
Gearbox Handle – Molded Plastic
Glider Body

View More Samples

Plastic injection molding equipment list

Machine Name Specification Quantity (set/piece)
Plastic injection molding machines 1600ton (10000g) 1
800ton (2800g) 1
500ton (1800g) 1
250ton (510g) 2
125ton (200g) 3
80ton (100g) 2
Ultrasonic welding Power: 2000W; Frequency: 20KHZ 1

Commonly used plastic resin

Acrylic (PMMA) LDPE
PC (Polycarbonate) PBT
ABS (Acrylonitrile Butadiene Styrene) PEEK (Polyetheretherketone)
Nylon PET (Polyester)
PETG PP (Polypropylene)
HIPS (Polystyrene) PPS (Polyphenylene sulfide)
Polysulfone PTFE
POM (acetal)

Plastic injection molding technical data and secondary operations

Rib thickness and rib height Rib thickness is recommended to be 60% to 80% of nominal wall thickness;
Rib height is recommended to be 3-4 times of nominal wall thickness
Plastic injection mold draft 0.5 -2 degree for the wall side which shrinks onto the mold in part releasing
Plastic injection molded part wall thickness consideration Uniform wall thickness is recommended to reduce Sink marks, Residual stresses, Voids, Warpage. 0.06″ – 0.16″ is considered to be normal wall thickness range.
Plastic injection mold construction
Steel Mold life (roughly estimated) Steel hardness
H13 1 M 52-54 HRC
738 0.8 ~ 1 M 45-50 HRC
718 0.8 M 45-48 HRC
P20 0.5 M 30-35 HRC
1045 (less used) 0.3 M > 22HRC
Normal lead time Tooling and sample: 3 weeks – 5 weeks. Complicated parts take longer.
Secondary operations
  • Painting
  • Screen Printing and Pad Printing
  • Ultrasonic Welding
  • Machining
  • Assembly

Engineering assistance

Impact simulation of a cone shaped plastic cushion

Engineering: Based on request, IQE can provide the following services for our customers:

  • CAD model development from your sample;
  • Stress analysis, which helps in knowing whether the design is adequate and optimized, and what changes are needed before the physical part is made;
  • Some Mechanical and Chemical Lab tests for your prototype part.

Main products

TV plastic cabinet, air conditioner plastic part, air fresher machine parts, mobile phone cover, medical plastic parts, automatic pool covers plastic parts