I'm looking for an idiom for “producing multiple (near) identical instances of something in rapid succession”. Ideally it would be colloquial and/or humorous. Do you know any?

Edit: Its intended use is to illustrate in a succinct manner the purpose of some piece of computer software that produces many documents, similar to a mass mailing. In German, we have e.g. “vom Fließband” and “am laufenden Band”, both referring to a conveyor belt in a factory.

Edit 2: I'm thinking about something advertising-like, it would be something like “[product name] – [it gives you] [special type of document] [idiom for ‘many of them in rapid succession’]”

Edit 3: I found cookie-cutter, which seems nice, but I think its main use is perjorative

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    In his characteristic, machine gun-like staccato, he fired off insults at each of the guests at breathtaking speed. You may mail me my Pulitzer ;) – Dan Bron Mar 14 '17 at 12:33
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    spitting out such instances – Drew Mar 14 '17 at 13:36
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    It would probably be helpful if you would give examples of instances where the idiom would be used. – Spagirl Mar 14 '17 at 13:45
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    Mail merge is a fairly dated expression of what you're describing. Add a sample sentence to your question, and use an 'X' or underscore where the word should be. This will give us a better idea of the type of word you're looking for. – Lawrence Mar 14 '17 at 14:19

This may work: churning out


churn out
v. To produce something in an abundant and automatic manner:

Although the chairs look handmade, the company churns them out in a factory.

The American Heritage® Dictionary of Phrasal Verbs. Copyright © 2005 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.

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    I think it sounds too unsophisticated to be used to promote a product, but I think OP is sticking on too many constraints. +1 for matching the requirements of the first paragraph so well. – Edwin Ashworth Mar 14 '17 at 20:30
  • +1 I agree w/@EdwinAshworth that your answer matches well OPs “colloquial/humorous” request & also w/his opinion that OP is asking too much of a single idiom. OP could consider spreading-out those constraints evenly over the entire sentence instead of packing them all in 1 idiom at the end, either w/your suggestion or Drew’s: “Our product continuously churns/spits out (nearly?) identical [documents] in rapid-fire fashion [until it’s told to stop].”//“Our product continuously churns/spits out [the desired number of] (nearly?) identical [documents] in rapid-fire fashion. – Papa Poule Mar 14 '17 at 21:32

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