JL628A · Two-for-one twisting

Published specifications

Values below come from the maintained catalogue record. The guide review date does not renew an earlier specification: read the dated source notes and confirm a current, matched configuration before comparing products.

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Jingli's page names the model, calls it a twister for short-staple yarn and shows an original photograph. A two-for-one spindle inserts two turns of twist for each rotation, which is why this design is common for plied spun yarn.

The long description then switches subject. It opens with chemical-filament equipment and talks about manual, semi-automatic and fully automatic machines as classes. It also quotes filament ranges, twist ranges, energy savings, break rates and named controls, none of them tied to a JL628A table or test report. Those figures are left out here. Ask for a corrected sheet for this model, with its revision and the options actually fitted, before you compare prices.

The photograph shows a long frame with many positions, a feed zone and a take-up zone. It gives no spindle count, speed, package capacity or doffing method, and the parts in the picture may differ from what is quoted today, so list every item you expect on the order. [1]

Jingli publishes no JL628A limits, so the enquiry carries the numbers, starting with the yarn count and the target twist. Send representative samples with the details below, and keep units and package conditions the same in every request so competing offers line up. [1] [2]

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Jingli sells doubling and winding as separate machines, and the JL328A is its high-speed doubler. If your ends are not yet combined on one package, a two-for-one twister normally needs a doubling stage first. Check with Jingli whether the JL628A quote assumes doubled feed.

Ask for a sketch of the full yarn path, from the packages you produce today to the twisted packages you need. It should mark each extra combining, winding or package step and the package size passed between machines. If you keep existing frames, send their output package details so Jingli can match the creel.

The JL328A page also carries an example from another machine, with efficiency and quality percentages. Leave those out of any line calculation that includes the JL628A. Ask for output figures for each stage on your yarn, and find out which stage sets the pace for the whole line. [2] [3]

Use these steps to judge the machine on the yarn you will actually twist. Write them into the purchase agreement so the same test can be repeated at your site. [1]

1. Lock the inputs

   Name the yarn lot, count and blend, feed construction and package condition. Agree the machine set-up and note every setting before the first spindle turns.

2. Agree the quality checks

   Decide how twist and direction are measured, which yarn properties count, and how many positions and packages are sampled. Set pass limits and keep reference yarn.

3. Inspect the packages

   Measure the packages against the agreed size, build and handling needs. Run them through your own next process and watch how they unwind.

4. Count good output

   Log running time, good yarn, rejects, breaks, stops and every doffing or handling task. Note how many positions ran and how power was measured.

5. Write it into the order

   Keep the trial samples, results and settings. Attach the accepted set-up and a repeatable start-up routine to the contract, with the party responsible for fixing any shortfall.

The quotation should name the JL628A with its revision and configuration, spindle layout, feed and output package limits, agreed yarn and twist range, drive and controls, and any installed options. Where the offer differs from the current web text, ask Jingli to explain the difference in writing.

Ask for the installation layout, the electrical and other utility needs including installed power, the operating manual, the lubrication and maintenance plan and the wear-part list. Settle commissioning, operator training and spare-part support, and say which preparation machines are inside or outside the scope.

Price, delivery time, warranty term and any energy saving are not given on the page. Agree them directly, and make sure every performance figure names the yarn, settings, measuring period and acceptance basis. Jingli's older spindle patent is a company record and gives no figures for this model. [1] [2]