Case Study: 2-Cavity 5-Compartment Thin-Wall Meal Box Mold

Turn efficiency into profit and win the market through stable production | H T Mould Senior Sales Engineer

Basic product information

1. Customer background: from “enough” to “want to make money”

At the beginning of this year, we received an inquiry from a lunch box packaging manufacturer in East China. The customer originally had several old sets of one-out-two molds, but they had the following problems:

• Long cycle (more than 12 seconds)
• The product has many flash edges and the yield is only 92%
• Mold repair is required every 50,000 mold cycles
• Production barely reaches 12,000 pieces in 24 hours

The core demand of customers is not "cheapness", but low enough cost per piece to enable them to accept large orders. They are competing for a chain group meal order with a daily demand of 50,000 five-compartment meal boxes. After on-site communication, we recommended H T Mould’s one-out-two mold for five-compartment lunch boxes specially designed for high-speed thin-wall injection molding.

2. Technical solution: Make money every 6 seconds

The core of this set of molds is not fancy structure, but ultimate cycle control.

Molding parameters

Why is 6 seconds critical?

In the field of thin-wall injection molding, every time the cycle is shortened by 1 second, the annual profit increases by tens of thousands of U.S. dollars.

3. Low cost: It’s not about buying cheaply, but about using it cheaply.

Many customers only look at the mold purchase price, but what really determines profits is the comprehensive usage cost.

1. Mold life: 3 million cycles is just the starting point

We promise normal use within 3 million cycles, and 5 to 6 million cycles is normal under reasonable maintenance.

2. Lower energy consumption and material costs

• Thin-wall PP design → reduce unit weight by 5–8%
• 6 seconds rapid prototyping → short holding time and lower energy consumption
• High hot runner balance accuracy → no cold slug waste
• Customer feedback: 8–10% more finished products per ton of PP

3. The yield rate is over 99%, and scrap products almost disappear.

The yield rate of old molds is 92%, and that of H T Mould molds is stable at 99.3–99.6%.

4. Efficient production: 24 hours a day, easy for man and machine

actual production pace

• Continuous operation 23 hours/day (1-hour shift change)
• Actual daily output is stable at 27,000–28,000 pieces
• Operators only need to change boxes, add materials, and perform random inspections every 2 hours.

Automation friendly

Reasonable demoulding slope + air ejector pin layout, no need for manual picking, and automatic stacking, counting and packaging with the robot. Only one worker is needed per line (traditionally 3 people are required).

5. Profitability measurement: real cases

Orders: 500,000 pieces/month, ex-factory price $0.123/piece, monthly output value $61,493.11

6. Maintenance is simple but must be done

Efficient mold maintenance is regular and predictable, making it more worry-free than old molds.

• Daily: Lubricate (10 minutes)
• Every 100,000 molds: Check the exhaust slot and clean it (about 2 hours)
• Every 1 million cycles: Check the hot nozzle, spring, gas ejector pin, and wear-resistant block, and replace them as appropriate

7. Customer’s original words: This set of molds is a “money printing machine”

8. Summary: Why choose H T Mould five-grid lunch box mold?

In the fully competitive market of thin-walled lunch boxes, profits are accumulated not by selling at high prices, but by accumulating every second, every piece, and every molding. What H T Mould does is to turn "efficiency" into "money".

If you need to know more about mold quotation, mold trial support or automation supporting solutions, please feel free to contact us at any time.

H T Mould - not just a mold, it is the profitability accelerator of your factory.