News/Custom Plastic Injection Molding: How It Works

Custom Plastic Injection Molding: How It Works

12.06.2025

Custom Plastic Injection Molding: How It Works

Custom plastic injection molding is a modern, precise, and cost-effective method for manufacturing plastic parts for various industries, from automotive to medical and electronics. Producing plastic parts using injection molding machines (IMMs) allows for high-precision and high-quality components based on your drawings, samples, or ideas. Here’s a step-by-step guide to how the plastic injection molding process works.

Step 1: Designing the Part and Creating a 3D Model

It all starts with your idea. We help bring it to life by creating a 3D model of the plastic part, considering all technical requirements:

  • Wall Thickness: At least 0.8–1 mm for optimal strength.
  • Draft Angles: Ensure easy part ejection from the mold.
  • Reinforcing Elements: Ribs, locks, and snaps for durability.
  • Aesthetics and Precision: Perfect surface finish and adherence to drawings.

Our engineers account for the part’s intended use, including strength, heat resistance, operating conditions, and assembly requirements. Order custom plastic injection molding, and we’ll create a 3D model tailored to your needs.

Step 2: Designing and Manufacturing the Mold

The mold is the core of the plastic injection molding process. Based on the 3D model, we design the mold, considering:

  • Mold type: Single- or multi-cavity for high-volume production.
  • Injection system: Precision material delivery.
  • Cooling system: To speed up production cycles.
  • Hot runner systems: To minimize waste.

We manufacture molds from austrian hardened tool steel, selecting the material based on production volume and budget. A high-quality mold ensures the durability and precision of plastic parts.

Step 3: Setting Up the IMM and Trial Runs

Once the mold is ready, it is installed on an injection molding machine (IMM) and configured with the following parameters:

  • Plastic heating temperature.
  • Injection pressure and speed.
  • Cooling time for the part.
  • Mold clamping force.

A trial batch is produced to verify the quality, dimensions, and appearance of the part. If needed, we adjust the mold or machine settings to ensure consistent results.

Step 4: Serial Production of Plastic Parts

After approving the trial samples, serial production begins. We offer:

  • Small batches: From 100 units for low-volume production.
  • Medium batches: From 1,000 units for regular orders.
  • Large-scale production: Tens or hundreds of thousands of parts.

We work with various thermoplastics, including ABS, PA (nylon), PC (polycarbonate), POM, PP, and PE. Materials are selected based on your requirements, such as impact resistance, UV stability, heat resistance, flexibility, and more.

Step 5: Post-Processing and Assembly

Finished plastic parts may undergo additional processing:

  • Removal of sprues and flash.
  • Drilling holes or threading.
  • Marking: Pad printing or laser engraving.
  • Packaging and sorting.
  • Assembly into complete sets.

We provide a full production cycle—from concept to finished product.

Why Choose Us for Plastic Injection Molding

  • Modern Equipment: A fleet of IMMs from Arburg, Engel, and other top brands.
  • Engineering Support: From design to serial production.
  • Turnkey Mold Manufacturing: Fast and high-quality.
  • Quality Guarantee: Consistent precision for every part.
  • Transparency: Clear timelines and process tracking.

We operate across Ukraine, delivering finished products to any region.

Order Custom Plastic Injection Molding

Ready to bring your idea to life? Contact us for a cost estimate, material selection, and tailored solutions for custom plastic part production.

Contact Us:

  • Phone: +380673054075
  • 📧 Email: sales@promservice.cn.ua

Start manufacturing plastic parts with us today!