Injection Molding Services

1.The Working principle (Four-Step Cycle) of Injection Molding

1. Mold closing and locking: The two halves of the mold are tightly closed and locked by the machine to withstand the injection pressure.

2. Injection: Plastic pellets are heated and melted in the barrel and then pushed into the closed mold cavity at high pressure and high speed by a screw or plunger.

3. Pressure holding and cooling: After the melt fills the cavity, maintain the pressure for a period of time to compensate for the shrinkage of the material during cooling. Subsequently, the products are cooled and set in the mold.

4. Mold opening and ejection: The mold is opened, and the ejection mechanism pushes the cured product out of the mold, preparing for the next cycle. The entire process can be fully automated, with cycles ranging from a few seconds to several minutes.

2.Derivative processes and technologies

To meet special needs, a variety of advanced processes have been developed:

· Two-color/multi-color injection molding: Manufacturing products that integrate multiple colors or materials.

· In-mold decoration (IMD/IML) : Embed the patterned film into the product surface simultaneously during injection molding.

· As-assisted injection molding: Used for manufacturing hollow thick-walled parts to prevent shrinkage marks.

· Micro-injection molding: Producing precision parts with milligram and micrometer dimensions.

· Insert injection molding: Insert metal parts, circuits and other inserts into the mold to form them in one go.

Key Features and Advantages of Injection Molding

· High efficiency: It can achieve high-speed production of several pieces per second, making it highly suitable for large-scale manufacturing.
· High precision and complexity: It can form products with extremely complex shapes, precise structures and stable dimensions in one go (such as gears, mobile phone casings, medical parts).
· Excellent consistency: Automated production ensures that each product is almost exactly the same.
· High material utilization rate: The waste from the runner and gate can usually be recycled, crushed and reused.
· Low labor cost: One operator can oversee multiple automated machines.

· Good surface quality: A smooth or textured surface can be directly obtained. Injection Molding

Choose Anxin for Injection Molding and You will Get

1.Not only for production, but also for prevention

Professional mold flow analysis is conducted during the mold design stage to optimize the structure in advance and avoid defects from the root, saving you trial-and-error costs.

2. One-stop solution, saving time and effort

We are responsible for the entire process from mold design to manufacturing, mass production, post-treatment and quality inspection. You don’t need multiple contacts, and communication efficiency doubles.

3. Focus on your industry and better understand your needs

We are deeply engaged in fields such as medical devices and automotive electronics, well-versed in industry standards and performance requirements, and our solutions are more precise.

4. Actively optimize costs for you

Engineers will proactively review the design and, under the premise of ensuring functionality, offer cost reduction suggestions (such as optimizing wall thickness and material selection), and provide transparent quotations without any concealment.

5. Complex parts are our forte

Skilled in precision processes such as thin-walled, multi-color, and insert forming, specializing in high-demand parts that deter ordinary suppliers.

6. Fast and punctual

Equipped with a rapid sample capability, it helps you seize the initiative. The on-time delivery rate for mass production is over 98%, and flexible production is used to meet urgent demands.

7. Quality is traceable and verifiable

Full-process data monitoring, 100% inspection of key dimensions. Support online viewing of production data, transparent quality for your peace of mind.

8. Be your long-term technical partner

From early design intervention to continuous support after mass production, we are willing to be an extension of your R&D team and grow together.

Select the Appropriate Surface Treatment According to Your Requirements

"I want colors/patterns”

· Single color, large batch → spraying

· Flat logo/ text → Screen printing

· Curved surface small logo → Pad printing

· Complex patterns of the entire product (such as camouflage, wood grain) → water transfer printing

"I want a metallic feel”

· Decorative and lightweight → Vacuum coating (UV protective layer required)

· Thick and realistic metallic feel, high wear resistance → Electroplated with water (strict environmental protection requirements)

· High-end, multi-color metals → PVD (high cost)

"I want a special feel/texture”

· Leather texture, matte feel and other permanent effects → Mold etching (first choice, most economical)

· Simple matte effect → sandblasting

"I want a super durable surface”

· Ultra-high hardness and scratch resistance → UV coating

· One-piece molding, no pattern falling off → In-mold decoration (IML/IMR)

2. Three Key Reminders

1. Design first: Surface treatment should be determined during the product design stage, especially texture and IMD process.

2. Pay attention to thickness: The coating/plating layer will increase the thickness (0.02-0.2mm), and precision assemblies need to reserve tolerances.

3. Comprehensive cost: Looking only at the process cost is not comprehensive. The following should be taken into consideration:

· Mold cost: Etching and IMD require mold modification

· Mass production efficiency: Although IMD and etching patterns increase the initial cost, the unit price for mass production is low and the quality is stable

· Environmental protection cost: The environmental protection treatment cost of processes such as electroplating is high

Injection Molding Frequently Asked Questions (FAQs)