Nov 2, 2026
CE Marking for Plastic Processing Equipment: What Buyers Must Verify
A CE mark is a claim, not a certificate. What documents to request, which directive applies, and the five checks that expose…
Engineering author
Z
Zhu Can
Technical Manager · 73 published articles
Technical Manager at TONGYI with 20 years of experience in plastic processing equipment and mold temperature control.
Nov 2, 2026
Factory Layout: Plan Utilities Before You Place Machines
Material piping, cooling water, vacuum and power routes are decided once. Why utility planning must happen before machine placement, and what it…
Nov 2, 2026
Retrofitting an Existing Plant with Central Feeding and Drying
Retrofitting a running plant is a sequencing problem, not an equipment problem. Phasing, shutdown windows and the four things that always take…
Nov 2, 2026
Preventing Material Contamination in Multi-Machine Conveying
Black specks, colour carry-over and wrong-resin shots in a central conveying system. Where contamination enters and the purging routine that stops it.
Nov 2, 2026
Total Cost of Ownership for Plastic Auxiliary Equipment
Purchase price is a third of the cost. Energy, downtime, spare parts and scrap decide the rest. How to compare two machines…
Nov 2, 2026
Vertical vs Horizontal Color Mixers: Which Blends Better?
Vertical mixers blend fast and empty cleanly; horizontal mixers handle heavy blends. Cycle time, uniformity and where each type actually wins.
Nov 2, 2026
How to Size a Chiller for Injection Molding Machines
Chiller sizing from shot weight, cycle time and mold cooling load. The three-step calculation, plus the safety margins that prevent summer shortfalls.
Nov 2, 2026
Vacuum Loader vs Central Conveying: Which Fits Your Plant?
One loader per machine or one central vacuum station? Distance, material count and change frequency decide, and the crossover is earlier than…
Nov 2, 2026
Chiller Maintenance: Five Checks That Prevent Summer Breakdowns
Most chiller failures are predictable. Condenser condition, refrigerant charge, water quality, pump and controls — what to check and how often.
Nov 2, 2026
Water-Cooled vs Air-Cooled Chillers for Injection Molding
Air-cooled chillers need no cooling tower; water-cooled chillers use less power. The decision turns on ambient temperature, load profile and plant layout.
Nov 2, 2026
Inline vs Central Granulating: Which Pays Back Faster?
One granulator per machine or one central unit for the hall? Labour, floor space, dust and payback compared for typical molding plants.
Nov 2, 2026
Gravimetric vs Volumetric Dosing: Accuracy, Cost and When It Matters
Gravimetric dosing weighs; volumetric dosing measures volume. The accuracy difference decides colour cost, and payback is often under a year.