Custom Injection Molding Services

Enhance your business capabilities with reliable and accurate injection molding services engineered with uniformity and repeatability. At Top Proto, we make and sell injection molds and sustainably design prototypes to full-scale mass production, making us your ideal partner.

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Accepted File Types: STEP, STP, SLDPRT, STL, DXF, X_T, X_B, IPT, CATPART, PRT, SAT, 3MF, JT

What Is Injection Molding?

Injection molding refers to making a part or a component using a specially engineered and built mold that has already been made in advance and injecting molten plastic into it. No further machining can usually be done after the part has been made in order to achieve repeatability; therefore, the design must accomplish the desired function within the parameters of plastic, the manufacturing process, and the shape of the mold. For a range of production and to keep the cost down, it is a manufacturing process that is used to produce parts of medium to higher volumes of plastic and offers consistency in quality.

Plastic Injection Molding Services for Custom Parts

Injection Mold Tooling

Precision, durability, and repeatability of high-quality aluminum and steel injection mold used in successive production runs.

Overmolding

New overmolding technologies which incorporate materials into a single uninterrupted component with enhanced grip, strength and functionality.

Insert Molding

Insert molding involves the incorporation of metal into plastic material to enhance the strength and saves on the time and cost of assembly.

Why Choose Us for Injection Molding Services?

Top Proto brings together the engineering, the advanced technology for tool and die making, and ultrasonic and CNC computers for the precise operation of CNC machines for fast and reliable injection services and solutions. We assist with the custom design of injection molds, and assist with analysis of the flow of melt and mold, and optimize the design, the analysis, and flow of melt and mold, and engineering design of injection molds for better quality control and more quality molds at lower production costs.

In the digital workflow, you will be able to use your CAD software to upload your design and get a fast and firm quote. You will be able to rapidly move into the process of tooling and production with confidence. Our quality systems are aligned with ISO systems, and we perform quality control inspections during the production of the molded parts, We provide and control your required fit-to-sample, finish, and performance, and quality control and production are fast and repeated so you will get the molded parts required in your batch after the batch to meet your needs.

Materials for CNC Machining Services

Leading companies and engineers rely on Top Proto for rapid iterations and durable, high-quality parts. Whether it’s for prototyping or full-scale production, our wide range of materials ensures we meet the unique requirements of any CNC Machining Services project with precision and speed.

Metal Materials

Category 1

Plastic Materials

Category 2

As Machined

Visible tool marks (3.2 μm Ra). Ideal for internal components where aesthetics are secondary to dimensional accuracy.

Bead Blasting

Smooth, matte appearance. Removes minor tooling marks and provides a professional uniform finish for external parts.

Anodizing Type II

Adds a corrosion-resistant layer. Available in various colors while maintaining the metallic texture of the substrate.

Hardcoat Type III

Extra-thick coating for extreme wear resistance. Typical for aerospace and defense applications requiring high hardness.

Powder Coating

Highly durable and impact resistant. Available in any RAL color with various textures from matte to high gloss.

Nickel Plating

Uniform coating regardless of part geometry. Excellent for corrosion protection and enhancing surface hardness.

Chem Film (Alodine)

Provides corrosion resistance while maintaining electrical conductivity. Available in gold (hexavalent) or clear (trivalent).

Mirror Polishing

Mechanical hand-polishing to achieve a mirror-like reflection. Ideal for medical devices and decorative aerospace components.

Injection Molding Surface Finishes

From industrial performance to aesthetic perfection, our expanded range of finishes meet rigid MIL-SPEC and aerospace standards for all injection molded components.

Injection Molding Design Guide Line

Feature	Description
Maximum Part Size	Up to 1300 × 900 × 500 MM, depending on material and mold design
Minimum Part Size	As small as 6 × 6 × 6 MM
Part-to-Part Repeatability	± 0.08 MM
Mold Cavities	Single-cavity, multi-cavity, family molds
Supported Mold Materials	Aluminum for rapid tooling, hardened steel for production tooling
Cavity Tolerances	± 0.015 MM on functional features
Secondary Operations	Texture finishing, labeling, tapping, ultrasonic welding
Undercut Handling	Slides, lifters, collapsible cores
Wall Thickness Range	0.6 MM – 4.5 MM
Draft Angle	Recommended 1° – 3° depending on surface finish
Ribs & Gussets	0.6 – 2.5 MM thickness
Boss Design	Diameter 3 MM – 12 MM
Typical Lead Time	Tooling in 15–25 working days

Our Injection Molding Gallery Parts

Explore our portfolio of high-precision components, showcasing advanced technology and engineering excellence. From intricate milling to high-speed turning, each part reflects our commitment to ISO-certified quality and technical perfection.

Rapid Tooling

Rapid tooling let’s you go faster to go from an idea to functional parts. With our advanced CNC machining service, we create molds and tooling with precision needed to test designs, validate fit, and function and bring products to market faster. It’s perfect for prototypes, low volume runs, and early-stage development where outworking competitors is critical and precision matters most.

Production Tooling

For our production tooling, we prioritize long-term durability. With top grade materials and precision CNC machining, we make tooling that allows full-scale production without losing accuracy. If you need thousands of the same parts, and even with batch production, we deliver consistent, reliable tooling and stable production cycles.

How We Works – 3-Stages Workflow

We guarantee that CNC parts are delivered on time and that the process is completely transparent in the following 3 simple steps:

Upload Your Files

Instant prices with DFM feedback for many file types.

We Manufacture Your Parts

You can select from many materials and methods.

Tracking and Receiving Your Parts

View the QC documentation and inspection photographs.

Pros of Injection Molding

Long Lasting:Made with guide tool steels, these molds last a long time..
Accuracy: Ideal for product consistency and quality over long production runs.
Cost Efficient : Perfect for short to long runs with little variation in product needs.
High-quality Finish: Provides high-quality surfaces.
Design Variety:Can accommodate detailed geometries and additional components.
Short Turnaround: More efficient cooling systems and part ejectors produce in less time.