Custom Plastic Injection Molding Solutions

From Your Design to Production-Ready Plastic Parts

Every injection molding project begins with more than just a part drawing.

Material selection, wall thickness, tolerances, mold structure, surface requirements, production quantity, and end-use conditions can all affect the final result.

Our custom plastic injection molding solutions support customers from initial project evaluation and tooling through sample approval and repeat production.

Whether you need a functional plastic housing, structural component, connector, cover, bracket, or other custom molded part, we manufacture according to your drawings, samples, and technical requirements.

Injection Molding Capabilities

Plastic injection molding is particularly suitable for projects requiring repeatable production of components with consistent geometry.

We support custom molded components for a variety of industrial applications, including:

• Plastic housings and enclosures
• Covers and protective components
• Brackets and structural plastic parts
• Connectors and mounting components
• Clips and fastening parts
• Equipment components
• Custom functional plastic parts

Depending on the design, features such as ribs, bosses, mounting holes, snap-fit structures, and other functional details can be incorporated directly into the molded component.

This can help reduce secondary processing and simplify final assembly.

Engineering Plastic Material Options

Choosing the correct material is an important part of an injection molding project.

Different plastics provide different combinations of strength, flexibility, temperature resistance, dimensional stability, chemical resistance, and appearance.

Common material options include:

ABS

ABS offers good impact resistance, dimensional stability, and surface appearance. It is widely used for housings, covers, enclosures, and general industrial components.

PP – Polypropylene

PP is lightweight and resistant to many chemicals. It is suitable for applications requiring flexibility and good chemical resistance.

PC – Polycarbonate

Polycarbonate provides high impact strength and can be used for components requiring toughness and durability.

PA – Nylon

Nylon offers good mechanical strength and wear resistance and is commonly used for functional mechanical components.

POM – Acetal

POM provides good dimensional stability, low friction, and wear resistance, making it suitable for precision mechanical plastic components.

Other materials can also be evaluated according to the application and technical requirements.

Tooling & Mold Development

For a new injection molded component, tooling is one of the most important stages of the project.

Before mold manufacturing begins, the part design should be reviewed for manufacturability.

Important considerations may include:

• Wall thickness
• Draft angles
• Undercuts
• Ribs and bosses
• Gate position
• Ejection requirements
• Surface requirements
• Material shrinkage
• Critical dimensions

Identifying potential issues before tooling can reduce the risk of expensive modifications later.

The typical project process includes:

Drawing Review → Mold Design → Tooling → Mold Trial → Sample Inspection → Approval → Production

Prototype & Sample Approval

For new products, sample verification is an important step before mass production.

Initial samples can be evaluated for:

• Dimensions
• Assembly fit
• Surface appearance
• Functional performance
• Material
• Critical tolerances

If adjustments are required, they can be discussed before the project moves into repeat production.

This helps establish a clear approval standard for subsequent batches.

Custom Colors & Surface Requirements

Plastic components can be produced according to different appearance requirements depending on the selected material and project.

Requirements may include:

• Custom colors
• Different surface textures
• Matte or gloss appearance
• Molded-in surface patterns
• Additional finishing or assembly

For projects requiring a specific color, providing a recognized color reference or approved physical sample can help maintain consistency.

Dimensional Control & Quality Inspection

Injection molded components must often fit precisely with other parts in an assembly.

For this reason, critical dimensions should be clearly identified on the technical drawing.

Inspection can be performed according to the product and customer requirements, including:

• Dimensional checks
• Appearance inspection
• Assembly-related dimensions
• Hole and feature verification
• Sample comparison
• Final inspection before packing

Material behavior and molding shrinkage should also be considered when defining tolerance requirements.

From Small Projects to Repeat Production

Injection molding becomes particularly efficient when a component moves into repeat production.

Once the tooling has been completed and approved, the same mold can be used to manufacture consistent batches according to purchasing requirements.

For customers developing a new product, the project can begin with design evaluation and samples before moving into larger production quantities.

For existing products, manufacturing can be evaluated according to supplied drawings, samples, materials, and previous specifications.

Industrial Applications

Custom injection molded parts can be used across a wide range of industries and equipment.

Typical applications include:

Industrial Equipment
Housings, covers, brackets, protective parts, and functional components.

Electronics & Electrical Products
Enclosures, connectors, mounting components, and insulating parts.

Automation Systems
Equipment components, guides, covers, fixtures, and structural plastic parts.

Mechanical Assemblies
Wear-resistant components, spacers, clips, supports, and customized parts.

Custom Product Development
Injection molded components manufactured specifically for new product designs.

Why Choose Our Injection Molding Solutions?

At Shenyang Syntune International Trade Co., Ltd., custom projects are evaluated according to the actual requirements of the component rather than a fixed standard product.

We support:

Drawing-Based Customization
Production according to 2D drawings, 3D CAD files, samples, and technical requirements.

Material Options
Different engineering plastics can be evaluated according to application requirements.

Tooling & Sample Development
Support from mold development through trial samples and production.

Repeat Production
Suitable for customers requiring ongoing supply of customized plastic components.

Secondary Requirements
Color, surface, assembly, inspection, and packaging requirements can be considered as part of the project.

Start Your Injection Molding Project

For a more accurate project evaluation, please provide:

• 2D drawings
• 3D CAD files
• Required plastic material
• Color requirements
• Expected quantity
• Estimated annual volume
• Critical tolerances
• Surface requirements
• Assembly requirements

If the material or manufacturing details have not yet been finalized, provide information about the component’s intended application and working conditions.

Need Custom Injection Molded Parts?

Send us your drawings and project requirements to request a quotation.