Calculator Manufacturing Unit
This project profile outlines the establishment of a manufacturing unit for portable electronic calculators, including pocket and desktop models. The unit utilizes injection molding for plastic casings and surface-mount technology for PCB assembly to produce reliable calculation devices for offices, schools, and retail establishments.
Project cost & finance
Cost of Project
figures in ₹ Lakhs
| Plant & Machinery | 12.5 |
| Furniture & Fixtures | 0.5 |
| Other Misc. Assets | 1 |
| Working Capital | 5 |
| Total | 19 |
|---|
Means of Finance
figures in ₹ Lakhs
| Own Contribution | 1.9 |
| Term Loan | 12.6 |
| Working Capital Loan | 4.5 |
| Total | 19 |
|---|
Raw materials & machinery
Machinery & equipment8
- Injection Molding MachineBuy on Amazon ↗
Machine to melt and inject plastic granules into molds for producing calculator casings and keys.
- Solder Paste PrinterBuy on Amazon ↗
Machine used to apply solder paste onto PCBs through a stencil.
- Pick and Place MachineBuy on Amazon ↗
High-speed machine used to accurately place surface-mount components on PCBs.
- Reflow MachineBuy on Amazon ↗
Furnace used to heat solder paste and attach electrical components to PCB contact pads.
- SPI MachineBuy on Amazon ↗
Solder Paste Inspection machine to verify solder paste volume and thickness.
- AOI MachineBuy on Amazon ↗
Automated Optical Inspection machine for checking component placement and solder joint quality.
- Temperature-Controlled Soldering StationBuy on Amazon ↗
Hand tool station used for manual soldering tasks such as battery contacts.
- Pad Printing MachineBuy on Amazon ↗
Machine used to print numbers, signs, and logos on plastic keys and casings.
Raw materials7
- Plastic GranulesBuy on Amazon ↗
PP or PVC granules used for injection molding of calculator cases and buttons.
- Controller ICBuy on Amazon ↗
Integrated circuits for processing calculation logic.
- Memory ChipsBuy on Amazon ↗
Components used to store calculator data and previous outputs.
- LCD DisplayBuy on Amazon ↗
Liquid crystal display used to output numbers and results.
- Customized Circuit BoardBuy on Amazon ↗
Bare PCB for surface-mount component placement.
- Silicone Rubber KeypadBuy on Amazon ↗
Keypad membrane with conductive contacts for button presses.
- BatteryBuy on Amazon ↗
Lithium cell or AA battery for power source.
Manufacturing process
- Raw material procurement and sorting of plastic granules, PCBs, and electronic components in a clean environment.
- Injection molding of plastic granules to form rigid external enclosures, cases, and keys.
- PCB assembly involving solder paste application, component placement using pick and place machines, reflow soldering, and automated optical inspection (AOI).
- Final product assembly where molded plastic parts, rubber keypads, LCDs, and assembled PCBs are integrated and screwed together with battery connections.
- Comprehensive testing including endurance, durability, response time, accuracy, and functional ICT tests.
Market
Electronic calculators are extensively used in offices, banks, shops, departmental stores, educational bodies, and research institutions.
From the project report
