Case Study: 1250 ml Round Bowl 4-Cavity Mold

Helping the customer reach 57,600 pieces per day while cutting unit cost by 30%

In food packaging, especially for takeaway, supermarket fresh-food packs, and disposable meal containers, production efficiency and unit cost often determine whether a customer can make money. As a front-line sales manager at H T Mould, I have seen many customers move from low-price competition to efficiency-driven profitability. This case study shares a proven solution for a 1250 ml round bowl bottom mold with four cavities, showing how the customer reached 57,600 pieces per day, cut total unit cost by 30%, and secured stable profits in a highly competitive market.

1. Customer background and pain points: high volume, low price, and profit limited by mold efficiency

Our customer is a medium-to-large food-packaging manufacturer in East China, mainly supplying chain restaurant brands, fresh-food supermarkets, and central kitchens. They had been producing 1250 ml round bowl bottoms with a 2-cavity mold on a 280T injection molding machine, running at about a 9-second cycle. The initial equipment investment looked modest, but the actual production problems were clear:

• Production bottleneck: daily shipments were only about 20,000 pieces, far below rising order demand.
• High unit cost: after electricity, labor, and equipment depreciation were allocated, the cost per bowl was not competitive.
• Frequent maintenance: the mold needed major service every 150,000 cycles, and the hot nozzle and springs failed often enough to disrupt delivery.
• Yield fluctuations: thin-wall PP needs excellent flow, but poor venting in the old mold limited yield to around 92%.

The customer's target was clear: double capacity or better, without sharply increasing machine tonnage or workshop space, while improving profit per piece.

2. H T Mould solution: 4-cavity thin-wall mold + 420T injection molding machine + 6-second cycle

In response to those requirements, we proposed a 1250 ml round bowl 4-cavity mold. After mold-flow analysis and production verification, we finalized the following key parameters:

Why can we run a 6-second cycle?

Thin-wall PP with a thickness of 0.4-0.6 mm demands extremely high filling speed and cooling efficiency. Our mold-flow analysis showed the following:

• An optimized multi-point hot-runner layout keeps the weld line in the non-load-bearing area at the bottom of the bowl.
• Conformal cooling channels run close to the cavity surface, with a temperature difference of no more than 2°C, ensuring stable ejection within 6 seconds without deformation.
• A 310°C melt temperature combined with high pressure and controlled cooling water pressure of 0.5-0.6 MPa balances filling and shrinkage.

In a 72-hour continuous production run, the cycle remained stable at 6.0-6.2 seconds, a clear improvement over the customer's previous 9-second 2-cavity mold.

3. How do we achieve low cost? Three main cost-reduction drivers

When customers first hear "4 cavities with a 6-second cycle," many worry that the mold will cost more and the larger machine will consume more power. The actual production data gives a clear answer.

1. Power consumption per piece drops by 42%

Although the 420T injection molding machine has higher installed power than the 280T machine, output per cycle doubles.
2-cavity production: 0.056 kWh per piece. 4-cavity production: 0.0325 kWh per piece.
That cuts electricity cost per piece by 42%. At an annual output of 15 million pieces, the savings add up to well over $100,000.

2. Labor and floor-space costs are greatly diluted

To produce 57,600 pieces per day with the old 2-cavity setup, the customer would need three machines and three operators. The 4-cavity solution needs only one machine and one operator. Labor productivity triples, and workshop space drops by 60%.

3. Mold maintenance cost stays low over the long term

This mold is guaranteed for 3 million cycles and can typically reach 5-6 million cycles with proper maintenance. The customer actually ran 3.8 million cycles in 18 months and only replaced two sets of ejector-pin springs and one hot-nozzle heating band. Average mold maintenance cost per bowl stayed below $0.0004.

4. Yield above 99%: lower waste means higher profit

After the first mold was debugged, production continued for 5 days, with a statistical output of 289,000 units, only 2,200 defective products, and a yield rate of 99.24%.
99% yield compared to the original 92%,reducing scrap-related loss by roughly $5,064.14 per month.

5. Better Profitability: Real Statements for a Quarter

6. Answers to Common Questions from Real Customers

7. Summary: Why an Efficient Mold Is a Profit Center in Itself

In the food packaging industry, the price war has no end, but the efficiency war has a moat.
H T Mould’s set of 1250ml four thin-walled molds has been proven by facts:

• 6 s cycle + four cavities—pushing conventional throughput limits;
• 99% yield + multi-million-shot life, minimizing hidden cost;
• The unit cost has dropped by more than 30%, allowing customers to lower prices to grab market share while also expanding total gross profit.

Buying a mold is not just spending money; it is investing in a production asset that improves profit every day it runs.

Contact H T Mould for a tailored ROI analysis and moldflow report.

Let every second of molding time turn into net profit on your account.

The data in this article comes from actual H T Mould customer production records and has been anonymized.
H T Mould specializes in thin-wall food packaging molds built for high output, low consumption, and long service life.