Why is the MOQ for a temperature-controlled case higher than for a plain case?

Answer: Assembly and burn-in add hours small batches cannot absorb. Around 150 pieces is a common threshold; below it, shared runs add roughly 10% to the unit price.

Can tooling cost be refunded, and how is it negotiated?

Answer: Yes, against volume. A common clause returns 50% at 1,000 cumulative pieces and 100% at 2,000, provided the contract states the buyer owns the tool.

Can the 40-day lead time be shortened?

Answer: By five to seven days at a 3–5% premium for oven priority. Below 30 days the burn-in stage gets sacrificed, which is not advisable.

Is it cheaper to price the module per piece or per set?

Answer: Per piece for large volumes, because replacement is cheaper; per set for small volumes, harness matching included.

How is sampling charged, and is it deductible?

Answer: Typically CNY 1,500–3,000 including one tool revision, deducted from the first order above 300 pieces. Put that in the quote notes; a verbal promise will not survive.

Temperature-Controlled Case Quotes: MOQ, Tooling and Lead Time

Quick answer: A temperature-controlled case quote is hard to compare because one number hides material, labour and fees. Split it into three sheets, fix MOQ and tooling ownership in writing, break lead time into four stages, and tie payment to operations rather than calendar dates.

Three sheets before you compare prices
MOQ and tooling ownership
Lead time in four stages
Quote traps: is the module inside the price?
Payment and inspection milestones
FAQ

1. Three sheets before you compare prices

Asking only for a unit price returns numbers built from different contents: one quote includes the temperature module and battery, another prices the empty shell; one spreads tooling into the unit price, another lists it separately. Unbundled, comparison becomes a test of nerve. Ask for the quote split into material, labour and fees, and the gap between two bidders points at a specific line.

Sheet	Should contain	Usual form	Negotiation point
Material	Powder grade, foam density, latch and module spec	Per unit, packing excluded	Virgin instead of regrind moves 8–12%
Labour	Moulding, trimming, assembly, power-up test	Buried in unit price	Whether commissioning is billed hourly
Fees	Tooling, sampling, packing, freight, tax	Tooling once, rest per lot	Whether tooling is refundable

Once split, comparison means something.

A supplier who quotes one total hides the most cuttable line inside an average.

2. MOQ and tooling ownership

MOQ follows from two facts: the effective moulding area of the machine and the minimum powder order. A temperature-controlled case with a 1.2 m cavity runs one cavity per mould at roughly 45 minutes a cycle, so two shifts produce under 30 units a day and 150 pieces is a normal threshold. Below that, the plant either shares a run or spreads changeover time into the price.

Temperature-Controlled Case: a cream case open on an airport floor, white tablet in the lid pocket, coiled grey cable, black handle and valve

Tooling ownership needs three sentences in the contract: who pays, who holds, how it leaves. A mid-size rotomoulding tool runs near CNY 68,000 with a life close to 50,000 shots, paid half on order and half after a passed trial. Without a clause the tool defaults to the factory, and three years later you cannot take the drawings with you.

A mould without a stamp cannot be identified after three years.

Stamp the buyer code and year on a non-cosmetic face, and hand over a cavity measurement record with the tool.

3. Lead time in four stages

Forty days is four stages stacked, each with its own delay; write all four into the contract.

Stage	Days	Typical blocker
Material	5–7	Powder grade change reopens colour approval
Rotomoulding	12–15	Changeover and trial runs take oven slots
Assembly	10–12	Temperature module or battery arrives late
Burn-in and packing	7–8	24-hour power test holds floor space

The delay rarely comes from moulding; it comes from bought-in parts at assembly. Modules, heater film and battery packs are usually outsourced, and any one arriving three days late parks the whole lot on the line. Where the buyer nominates the module model, a temperature-controlled case order should start its lead time from the day material reaches the plant.

Burn-in is the stage most often compressed and least safe to compress. Twenty-four hours of power-up reveals whether the controller's auto-tune settles and whether the heater film overheats locally. Skip it and the problem surfaces in the customer's hands.

4. Quote traps: is the module inside the price?

One module, three ways to write it: inside the unit price, where a failure returns the whole case; listed per piece, so the module is replaceable; or quoted as a set with probe and harness. All three are defensible, and the difference is where warranty responsibility lands.

Temperature-Controlled Case: an ivory case closed on a pale lobby floor, three front latches, folded handle, round valve above it, padlock hole

For a temperature-controlled case the usual trap prices the module at zero and recovers it through commissioning fees later. The test is simple: ask for an empty-shell price and a complete price, and read the difference as the real module cost. A gap well under market rate means the model was swapped.

Parameters such as 60 W heater film and ±1 °C accuracy belong on the quote annex, not the brochure.

5. Payment and inspection milestones

Milestones hang on operations you can see, not on dates:

30% on order, releasing material, with purchase orders for powder and modules returned to you.
60% before shipment, released on a passed inspection held after assembly and before burn-in.
10% after acceptance, within 15 days of arrival with no appearance or function claim.

Inspecting before burn-in keeps problems inside the plant. Inspect afterwards and the supplier will call the damage transit.

Sixty-day terms are not harsh here, but longer terms add financing cost, typically 6% annualised into the unit price.

Conclusion

The hard part of buying a temperature-controlled case is not the bargain, it is turning a vague quote into a structure you can check. Three sheets make cost visible, four stages make delay attributable, milestones tied to operations remove half the disputes. Write tooling ownership and module model into the contract, and the unit price finally has room to move.

This article discusses only the container (case body) side of specifications and design intent, and does not cover any handling, loading or use of the contents.