How should a buyer compare used Haitian, Yizumi and Chen Hsong offers?
Compare independently sourced used-machine offers by evidence quality before brand or price: verified identity, mold fit, controller and electrical condition, mechanical and hydraulic function, safety, repair scope, delivery responsibility and commercial clarity. A familiar brand name does not remove the need for machine-specific proof.
Decision checklist
- Normalize each offer into the same evidence file before price comparison.
- Score identity, mold fit, controller, function, safety, repair scope, delivery and commercial clarity.
- Avoid treating one documented offer and one unsupported listing as comparable.
- Keep any real-machine score, seller, price, stock, condition or delivery date as NEEDS_EVIDENCE until documented.
Start with comparable facts
Before scoring any offer, normalize the information. Each machine should have a nameplate photo, seller identity, full machine photos, controller boot, alarm and operation screens, clamping unit and injection unit videos, technical fields needed for mold fit, included auxiliaries and missing items.
The file should also record known repair or refurbishment scope, packing, loading and trade-term responsibility, price, currency, validity date and destination compliance questions. If one offer has these records and another has only a price and exterior photos, the two offers are not ready for price comparison.
Haitian, Yizumi and Chen Hsong are third-party trademarks here and are used only for neutral identification. This is not a brand ranking.
Use an evidence-weighted scorecard
A practical scorecard should give the highest weight to identity, mold fit, controller condition and mechanical function. Safety, repair scope, delivery scope and commercial clarity should also be reviewed because they can change the real project risk.
Use the scorecard to decide which machine deserves inspection. Do not publish a real score unless the supporting records are available for that exact machine.
- Identity and ownership: nameplate, serial field and seller control of the asset
- Mold fit: tie bars, mold thickness, daylight, ejector and injection unit
- Controller and electrical condition: HMI pages, alarms, I/O, voltage and cabinet condition
- Mechanical and hydraulic function: clamp, injection, screw, carriage, leakage and lubrication
- Safety and guarding: guards, interlocks, emergency stop and service risk
- Repair, delivery and commercial clarity: written scope, documents, payment and validity
Use brand-specific prompts without brand bias
For a used Haitian machine, request nameplate-model consistency and compare clamping and injection-unit fields against the relevant family material where applicable. Haitian Mars and Jupiter materials show why clamping force, tie-bar spacing, mold height, screw diameter and injection pressure should be checked separately.
For a used Yizumi machine, request controller evidence early. Yizumi materials describe controller and HMI-related features on SKII and A5 product lines, but the actual used machine may have a different controller, option package or service history.
For a used Chen Hsong machine, put mold fit and controller pages together. Chen Hsong Jetmaster materials list fields such as screw diameter, injection pressure, clamping force, tie-bar spacing, mold thickness and ejector values. These fields are useful only when matched to the buyer's actual mold and the specific used press.
Red flags that should pause comparison
Pause the comparison when the seller refuses to show a readable nameplate, never shows the controller screen in the same video as the machine, states year or hours without records, copies mold-fit fields from a catalog without measurements, or uses vague condition language without evidence.
Other red flags include missing or bypassed safety devices, a price that excludes dismantling, packing, loading or documents while the comparison treats them as included, and any request for a deposit before identity, condition and responsibility are documented.
Technical limitations
Manufacturer product materials are useful references, but used machines may differ by year, market, retrofit and service history. ISO 20430 provides injection moulding machine safety requirements, but local installation and workplace rules still apply.
OSHA hazardous-energy guidance is relevant when service, inspection or repair exposes workers to stored energy. A comparison scorecard cannot replace inspection, mold trial, customs advice or legal review.
Common buyer questions
Is one brand always the better used-machine choice?
No. The better choice for a used-machine project depends on the exact machine, evidence quality, mold fit, condition, support route, delivery scope and buyer requirements.
Should price be scored first?
No. Price should be compared after machine identity, condition, mold fit and delivery scope are clear. A lower price with missing evidence may carry higher project risk.
Can this scorecard be used for other brands?
Yes, as a structure. Replace the brand-specific prompts with the relevant manufacturer materials and machine evidence for the offered press.
Sources and references used for this guide
This guide supports early project planning. Final machine selection and commercial configuration must be confirmed from the actual part, mold, material, factory utilities and production target.
