Welcome to Papers and Boards: Making in Multiples!
Have you ever wondered why every cereal box in the supermarket is exactly the same size, or why a handmade wedding invitation feels so much more expensive than a standard birthday card? In this chapter, we are going to look at scales of production (how many items we make) and the processes and techniques used to make sure they are high quality and cost-effective. Whether you are making one item or one million, there is a specific way to do it!
1. Scales of Production
In the world of Design and Technology, we categorize how many products are made into four main "scales." Choosing the right scale depends on the cost, the demand, and the machinery available.
One-off Production
This is when you make a single, unique product. It is often handmade by a highly skilled person.
Example: A custom-made pop-up book or a hand-painted prototype for a new board game.
Key Takeaway: High cost per item, but very high quality and unique.
Batch Production
This is when a specific number of identical products are made (from dozens to a few thousand). Once the "batch" is finished, the machines might be changed to make something else.
Example: 500 programs for a school play or 1,000 limited-edition gift boxes.
Key Takeaway: Uses templates and jigs to make sure every item in the batch is the same.
Mass Production
This is for products in very high demand. The production line runs for a long time making the same thing over and over.
Example: Corrugated cardboard delivery boxes or standard juice cartons.
Key Takeaway: High setup costs (for expensive machinery), but the cost per item is very low.
Continuous Production
This happens 24 hours a day, 7 days a week, often for months or years at a time. The process rarely stops because stopping the machines is expensive.
Example: The production of standard copier paper or foil-lined board.
Key Takeaway: Highly automated with very few workers needed.
2. Modeling and Prototyping
Before a company spends thousands of pounds on mass production, they must test their ideas. We use modeling to catch mistakes early!
Test Modeling: This is used to check a specific part of a design. For example, testing if a specific paper engineering fold will actually pop up correctly.
Frame Modeling: This focuses on the "skeleton" or the structure of the product. It checks if the product is strong enough to stand up or hold weight.
Intermediate Modeling: These are more detailed prototypes. They look and feel like the final product and are used to show clients or test with real users.
3. Techniques for Quantity Production
If you are making 100 items by hand, you don't want to measure every single one from scratch. That leads to mistakes! Instead, we use quantity production techniques to stay accurate.
Marking out: This involves using reference points, lines, and surfaces. Instead of measuring from a wobbly edge, you always measure from a perfectly straight "datum" edge to ensure accuracy.
Templates: A shape cut out of a hard material (like acrylic or thick board). You place it on your paper and trace around it. It's fast and keeps the shape identical every time.
Jigs and Fixtures: A fixture holds the material in the exact same place every time. A jig goes a step further—it holds the material and guides the tool (like a guide for a craft knife).
Patterns and Moulds: These are used to create 3D shapes or textures in paper and board, often through pressing or embossing.
Sub-assembly: This is when parts of a product are put together separately before being joined to the main product. Example: Gluing the plastic window into a folding boxboard sandwich pack before the box itself is folded.
4. Working with Accuracy and Waste
In an exam, you might be asked how to keep quality high or costs low. Here are the technical terms you need:
Quality Control (QC): These are checks during manufacture to ensure the product meets a standard. For example, checking the printability of a board to make sure the colors aren't blurry.
Tolerance: No product is 100% perfect. Tolerance is the "acceptable error" allowed. For example, a box might be designed to be \( 100 \) mm wide, with a tolerance of \( \pm 0.5 \) mm. This means any box between \( 99.5 \) mm and \( 100.5 \) mm is a "pass."
Efficient Cutting (Nesting): To save money and the environment, designers arrange shapes close together on a sheet of card to minimize waste. If you leave too much space between shapes, you are throwing money in the bin!
Quick Review: The "Don't Panic" Guide to CAM
Computer-Aided Manufacturing (CAM) uses machines like laser cutters to cut or engrave paper and board.
- Advantages: It is incredibly fast, very accurate, and can work 24/7 without getting tired.
- Disadvantages: The machines are very expensive to buy and require trained staff to set them up.
5. Summary Table: Choosing the Right Technique
If you are making... 1 Item
Use: Hand tools, pencil and ruler (marking out), test modeling.
Scale: One-off.
If you are making... 100 Items
Use: Templates, jigs, and intermediate modeling.
Scale: Batch.
If you are making... 1,000,000 Items
Use: Die-cutting, mass-printing, CAM, and very tight tolerances.
Scale: Mass or Continuous.