Chinese engineers reviewing injection molded plastic samples during mold trial

Injection Molding Services

We provide custom injection molding services for plastic parts after mold development and confirmation. The service covers sample production, low-volume production, and mass production, with attention to material selection, molding conditions, dimensional stability, and final inspection.

Precision Production consistency is controlled according to part dimensions, material behavior, mold quality, and molding conditions.
Tolerance Tolerance can be evaluated based on part size, material shrinkage, wall thickness, mold structure, and production requirements.

Service Overview

Injection Molding Services

Yinuomold provides custom injection molding services for B2B plastic part projects. Our injection molding service is suitable for sample production, low-volume production, and mass production after the mold has been developed and confirmed.

We work with customers who need custom plastic components for industrial products, consumer electronics, home appliances, automotive-related parts, and other plastic part applications.

Our Injection Molding Scope

Our injection molding service may include:

– Plastic material selection
– Mold trial and sample production
– Low-volume production
– Mass production
– Appearance and dimensional checking
– Basic assembly support
– Packaging support

Common Plastic Materials

We can work with common engineering and general-purpose plastics, depending on the part structure and application requirements.

Common materials may include:

– ABS
– PC
– POM
– Nylon
– PP
– PE
– PMMA
– TPU / TPE

The final material should be evaluated based on strength, appearance, temperature resistance, flexibility, cost, and product usage.

Typical Applications

Injection molded plastic parts can be used in many B2B product projects, including:

– Electronic housings
– Plastic covers
– Internal structural parts
– Brackets
– Buttons
– Connectors
– Appliance components
– Industrial plastic parts
– Automotive-related plastic components

Quality Control

For injection molding projects, we focus on stable production and basic quality control throughout the process. The inspection process may include material confirmation, first article inspection, dimensional checking, appearance inspection, production consistency checking, and final inspection before shipment.

Project Evaluation

Before production, we usually need drawings, samples, material requirements, estimated quantity, surface finish requirements, and any special assembly or packaging needs. These details help us evaluate the mold, material, production method, cost, and lead time more accurately.
Chinese engineers reviewing injection molded plastic samples during mold trial Chinese quality inspector measuring injection molded plastic parts with calipers Chinese technician inspecting molded plastic parts beside an injection molding machine Chinese worker packaging injection molded plastic parts for shipment in a factory

Surface Treatments

Mold Texture

Mold texture can be applied to improve product appearance, surface touch, and functional requirements based on the part design.

Polishing

Polishing can be used when the molded part requires a smoother or cleaner surface finish.

Silk Screen Printing

Silk screen printing can be used for logos, symbols, marks, and simple surface graphics on plastic parts.

Pad Printing

Pad printing is suitable for adding marks, logos, or symbols on curved or irregular plastic surfaces.

Painting

Painting or spraying can be discussed when the product requires a specific color, appearance, or surface effect.

Quality Control

Material Confirmation

Material type and basic requirements are confirmed before production according to the project specification.

First Article Inspection

The first molded samples are checked before continuous production to confirm appearance, dimensions, and basic functionality.

Dimensional Inspection

Key dimensions are checked according to drawings, samples, or agreed project requirements.

Appearance Inspection

The surface is checked for visible defects such as flash, sink marks, color difference, deformation, or scratches.

Production Consistency Check

Batch consistency is monitored during production to reduce variation between samples and mass-produced parts.

Final Inspection Before Shipment

Finished parts are checked before shipment based on the confirmed quality requirements and order details.

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