Custom plastic injection molding, from 2 grams to 3 kilograms

A plastic injection molding factory in Changhua, Taiwan, founded in 1987, with 11 machines from 50 to 600 tons. From mold development and trials to mass production and inspection, we match the right machine and process to your part size and volume.

Inside the Li Yuan Hsing plastic injection molding factory with injection molding machines
Equipment

Injection molding equipment

Our 11 injection molding machines range from small to large tonnage, from the brands Hwa Chin, Chuan Lih Fa and Chen Hsong, so small precision parts and large finished products can be made under one roof.

Machines11
Clamping force50–600tons
Shot size2.5–54oz
BrandsHwa Chin · Chuan Lih Fa · Chen Hsong
  • 50T2.5 oz
  • 120T4.5 oz
  • 150T6 oz
  • 160T6 oz
  • 180T7 oz
  • 250T 
  • 300T14 oz
  • 350T15 oz
  • 450T27 oz
  • 500T54 oz
  • 600T54 oz

Part size range

approx. 2–3 gSmall precision parts
approx. 2–3 kgLarge parts and products

We choose the machine by part size, weight and volume, from small bushings and washers to storage boxes and housings. Feasibility is confirmed after reviewing the part design and material.

Process

From mold to mass production

Every new product goes through these steps before moving into stable mass production.

Plastic injection mold development01

Mold development

We review the part structure and plan the mold, working closely with our mold makers.

Mold trial on an injection molding machine02

Mold trial

The mold is trialed on the machine and molding conditions are tuned to confirm dimensions and appearance.

Mass production on a plastic injection molding machine03

Mass production

Once conditions are approved we move to mass production, with every machine monitored in real time.

Quality inspection of finished plastic parts04

Inspection

Parts are inspected to your specifications, then packed and shipped.

Quality & Control

Quality and production control

Real-time monitoring dashboard for injection molding machines
IoT monitoring dashboard (illustrative screen)
  • Real-time machine monitoringRunning, idle and fault status plus output of every machine are tracked live, so job progress is always visible.
  • Dynamic balancing testingFan blades and rotating parts are measured on a computerized balancing machine. Fan blades & balancing →
  • One-stop integrationWe coordinate metal parts, printing, assembly and packaging, so you deal with one supplier instead of many.
Applications

Injection molding projects

Injection molded transparent plastic fan blades

Appliance fan blades & parts

Injection molded plastic plumbing fittings and tee connectors

Bathroom plastic parts

Injection molded moisture-proof plastic pet food containers

Pet products

Injection molded plastic bicycle bottle cages

Bicycle components

Injection molded glass-fiber nylon automotive structural parts

Automotive parts

Injection molded plastic structural frames for sports equipment

Sporting goods parts

FAQ

Frequently asked questions

What size of plastic parts can you mold?

With 50 to 600-ton machines we handle parts and products from about 2–3 g up to 2–3 kg. Final feasibility depends on part size, design and material.

We don't have a mold yet. Can you start from mold development?

Yes. We can start from your concept or drawings, carry out structural review, mold development and trials, then move to mass production once approved.

We already have a mold. Can you run production for us?

Yes. Send us the mold information and part specifications, and we will evaluate a suitable machine and molding conditions.

Can you handle printing, assembly and packaging after molding?

Yes. We coordinate metal part machining, printing, assembly, packaging and shipping for one-stop manufacturing.

Have a plastic part to develop or produce?

Send drawings, samples or estimated volumes and we will reply with our evaluation and quote.

Contact us →