Ayşe Rana Kaplan
DOVETAIL PRODUCTION PROCESS
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Author Archives: ayseranakaplan
GLASS> TEMPERED GLASS
Plates that made out of tempered glass are thinner, stronger and lighter than the other plates. They are also safe with microwave and dishwasher. It makes them suitable for everyday use.
GENERAL FEATURES
- (+) Stronger than “ordinary,” or annealed, glass
- (+) Has higher thermal strength
- (+) It is thicker which makes it damage resistant
- (+) It breaks into small and harmless pieces when it is shuttered.
Why did they choose this material for this product?
Tempered glass is chosen for this product because of its resistance for heat and damage because in everyday use, microwaves and dishwashers are used very common. And, other types of plates might broke more than this one.
USAGE AREAS
Tempered glass is used for its safety and strength in a variety of applications, including passenger vehicle windows, shower doors, and tables. Also, for phone screens tempered glasses are commonly used.
Tempered glass is used in shower doors for safety reasons. It is also smudge resistant and easy to clean which is important for an environment is full of water. And it is versatile, there are many different types of glass for preference.
Tempered glass can provide better and longer protection for your furniture. They don’t crack nor get scratches easily which could keep its life longer. And since tables are used everyday, it should be durable and strong.
This glass type is used to cover the phone screen and protect it from scratches and damages.
Phases of Process
Stage 1: It starts as float glass. Before it undergoes tempering, the glass is examined for imperfections. Bubbles, inclusions, and cracks may cause the float glass to break during toughening.
Stage 2: Secondly, it is cut to the desired shape as it won’t be possible to cut the finished product in its toughened state. Once cut, the edges are smoothed and any burrs produced during cutting are removed.
Stage 3: To completely remove the grains of glass that were deposited during sanding, the float glass is thoroughly washed. This also ensures that dirt and any other tiny debris won’t interfere with the tempering.
Stage 4: In the tempering process, the surface of the float glass is heated at over 600 degrees Celsius as it travels through a furnace. Some manufacturers heat the glass above its annealing point of approximately 720 degrees Celsius.
Stage 5: The scorching glass is then rapidly cooled through quenching by a high-pressure blast of air for a period of three to 10 seconds at various angles. As it cools and begins to shrink, tensile stresses temporarily build-up in the interior zone of the glass while its surface consequently develops surface stresses. These compressive stresses eventually enhance the strength of the glass, making it tougher to break.
Related Processes
Laminated glass: Process involves bonding layers and interlayers.
Heat strengthened glass: The process is similar to the traditional process of glass tempering, but the cooling cycle is less rapid.
References:
https://economyglass.com.au/tougheningtempering-process-of-glass-explained/gl
https://homeguides.sfgate.com/chipresistant-dinner-plates-105825.html
Award Production Process
Görsel
Wood > Engineered Timber > MDF
MDF (medium-density fibreboard) is a wood type as producing with recycling chipped wood. For the production of MFD, hard and softwoods are debarked and chipped into fibers with steam knives. The fibers get washed to remove barks, soil, and abrasive contaminants. Then, fibers are mixed with glutinous materials to bind to each other and get harden. The mixture is dried, placed in a mold, and formed into a sheet by cold and hot press. After that, it is finalized by applying cooling and sanding processes.
General Features
(+) Does not have knots or kinks
(+) It is a recycling process
(+) Suitable for mass production
(+) Cheap
(+) Fast production
(-) Heavy
(-) Weaker than wood
(-) Absorbs water
(-) Does not take screws and nails easily
Usage Areas
MDF is a dense product and has uses in different industries. It is usually covered with a veneer on the surface and is a durable product. It has a wide variety of uses. IKEA uses MDF for its products such as frames, shelves, cabinets, etc.
- Furniture
- Flooring
- Decorative items
- Shelves ans cabinets
- Door frames
Why did they choose this material for this product?
They did choose this because MDF is cheap and frames are not needed to be that strong as wood. It is affordable for wider groups of people.
For the frame production, MDF is cut into 4 pieces, joined with v-nails from the corners, and covered with veneer. Frames are used on tables, shelves for displaying things as photos, paintings, etc. They are mostly used for decorating purposes.
For this product, again MDF is cut into pieces, painted, and put in the flat packaging for the user to assemble it. Shelves are used for books or decorative things to put and MDF is strong enough to be used as a shelf.
Phases of Process
Wood Chipping:
Firstly, wood is separated from the bark. Afterward, these woods are chipped into rectangles with a thickness of approximately 25mm and 5mm. And transferred to the next level.
Chip Washing:
In this process, chips are cleaned from abrasive materials such as soil, shell, sand. In this way, a higher quality product is obtained in the end product.
Drying and Blending with Chemicals:
To eliminate defective chips before defibration, the chips are covered with paraffin wax and then dried with a steam heater.
The chips are mixed with a defibrillator at a high temperature to form a dough. and goes to the blowing line to mix with the resin and dry.
Mat Forming & Hot Processing:
The mat is then passed through the hot press to make the strong bonding of the fiber mats. The hot press allows up to 10 mats to be pressed at a time to the specified thicknesses.
Cut to Size & Dicing:
The mat is then passed through the hot press to make the strong bonding of the fiber mats. The hot press allows up to 10 mats to be pressed at a time to the specified thicknesses.
Similar Materials
- Particle board: cheaper than MDF, light, not so strong
- Solid wood: expensive, lasts a long time, stronger
- OSB: cheaper, chips have direction
References
- https://www.ikea.com.tr/
- https://civiltoday.com/civil-engineering-materials/timber/163-advantages-and-disadvantages-of-mdf
- http://www.plywoodinspection.com/mdf-manufacturing-part-1-production-process/#:~:text=In%20a%20nutshell%2C%20wood%20is,it%20is%20ready%20for%20sale.
- http://www.kmm.ua/en/technology/stages-of-production
- https://forestplywood.com/blog/plywood-uses/what-are-the-uses-of-mdf/
- https://www.cbjltd.co.uk/news/6-common-practical-uses-of-mdf-medium-density-fibreboard
PEN ERASER
Most of the parts of this eraser are made from polypropylene and manufactured with injection molding technic.
The spiral structure here connects the two parts and shows that it is manufactured with injection molding technic.
Here is a lock system that benefits from plastic’s flexibility. The blue part is flexible and it fits in the hollow part that is shown with red.
Here is an offset that is used to make two parts fit together.
The red parts keep the spring steel in its place and prevent it from sliding. Again, the parts shown with arrow marks can be pressed inside to take off the steel spring.
Product Review: Plastic Ruler
Plastic rulers are transparent items that have measurements on them and they are used in different kinds of areas in daily life.
They are flexible thanks to the plastic but with so much force they break.
They get easily damaged on the surfaces too. After long time of use, it gets blurry because of the scratches on the surfaces.
But they are cheap so they can easily replaced with a new one.
The transparency also provides us to see the previous lines or the things under the ruler.
Material and Technology 