How Faster Changeovers Turned a Fragmented Lid Order Book into Profitable Production

For a Houston-area converter producing lids for food service packaging, the central production challenge was not press speed. It was the time and material lost whenever the plant switched between its 52 active SKUs. By reducing average changeover time from 68 to 23 minutes, the company recovered capacity, shortened lead times and created room for rush orders without purchasing speed for speed’s sake.

Case Background: A Business Built on Small Orders

The converter produces lids for sauce cups, portion containers and condiment tubs, supplying mainly food service distributors across the southern United States. The economics of distribution make product variety essential: a single distributor may place eight SKU lines in one shipment, with each line containing approximately 120,000 to 250,000 lids.

The plant managed 52 active SKUs across four lid diameters and eleven print designs. On its mechanical press, each changeover took an average of 68 minutes and consumed approximately 24 verification lids before production could proceed.

With roughly nine changes each week, changeovers were taking just under one-quarter of the available machine hours. During peak season, the loss of productive time had become serious enough that the plant was declining rush orders.

The Business Case Was About Hours, Not Maximum Speed

Management initially considered purchasing a faster press. A closer review of production data showed that the larger opportunity was elsewhere: reducing non-productive time between SKUs.

Where the 45-Minute Saving Came From

1. Stored Parameters Replaced Repeated Mechanical Settings

Feed length, stroke timing, tension set point, embossing pressure and batch count are stored for each SKU in the multi-axis servo controller. Instead of manually resetting multiple points, the operator selects the appropriate SKU recipe, fits the die and begins the setup run.

2. Self-Locating Registration Reduced Verification Waste

The photoelectric registration system automatically locates the print mark. This removes the need to establish registration through repeated manual adjustments and trial cuts.

As a result, verification consumption fell from approximately 24 lids to four lids per change. A saving of around 20 lids may appear modest in isolation, but it becomes meaningful when repeated across regular changeovers and recurring SKU cycles.

3. Embossing Became a Recipe-Controlled Parameter

Seven of the plant’s 52 active SKUs use a full-format texture, while the remaining SKUs are plain. On the mechanical press, switching between plain and embossed products required the embossing unit to be installed or removed, adding approximately 50 minutes.

On the CC450-S, the independent servo embossing unit is recipe-controlled. Embossing pressure can therefore be recalled as a production parameter, avoiding the additional hardware change when moving between plain and embossed SKUs.

4. Automatic Batch Counting Simplified Run Completion

The vacuum collection system counts finished lids to a preset batch quantity. Operators no longer need to stop and manually reconcile the final count at the end of each run. The saving per order is limited, but its cumulative effect matters in a schedule with frequent SKU changes.

CC450-S Configuration for the Application

The selected configuration was designed around the converter’s product range and short-batch operating model. It provided sufficient web width for all four lid diameters while supporting aluminum foil, film and coated paper applications.

The operating speed was selected according to run length rather than treated as a fixed target. Long orders could run at 420 strokes per minute, while short batches were typically kept between 320 and 360 strokes per minute to control waste as the run approached completion.

Operating Change: From Campaign Production to Mixed Weeks

Before the equipment change, the plant grouped products into campaign runs of two or three SKUs per week because every changeover was expensive. While this reduced the number of setups, it also encouraged overproduction, raised finished-goods inventory and made urgent orders difficult to accommodate.

With average changeover time reduced to 23 minutes, the plant moved to a mixed schedule capable of handling up to nine SKUs per week. Production could follow actual demand more closely instead of being organized primarily around avoiding machine setup.

Business Results Beyond Recovered Capacity

The immediate gain was approximately 6.8 additional production hours per week. However, the broader operational effect came from changing how the plant could accept, schedule and complete work.

• Shorter lead times: Average order lead time fell from 10 working days to four.
• Lower inventory: Finished-goods stock declined by approximately 30% because the plant no longer needed to overproduce during campaign runs.
• Greater responsiveness: Rush orders that had often been declined during peak periods could be accepted within 48 hours.
• Reduced overtime: Regular Saturday shifts were eliminated during the sampled quarter.
• Less setup waste: Verification requirements fell from 24 lids to four per change.

These outcomes were connected. Faster changeovers enabled more frequent SKU production, which reduced the need for inventory buffers. The recovered schedule capacity then provided room for urgent orders without relying on routine weekend overtime.

What This Means for Fragmented Order Books

For converters managing many short runs, the most important specification may not be maximum stroke rate. A more useful measure is the total changeover cost per SKU, including setup minutes, verification waste, operator intervention and any hardware changes required for processes such as embossing.

When comparing equipment for a fragmented order book, buyers should ask four practical questions:

1. How long does it take to change the die and recall the next SKU recipe?
2. How many verification pieces are typically consumed before saleable production begins?
3. Does switching between plain and embossed products require a hardware change?
4. Can the collection system count automatically to a preset batch quantity?

These questions connect machine design directly to production economics. A higher maximum speed adds limited value if frequent setups continue to consume available hours and restrict scheduling flexibility.

Frequently Asked Questions