materials - mass production

8/9/2019 Materials - Mass Production

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Design criteria for mass produced furniture.

Modular design approach enables product variety by mass produced standard modules. (Availability of wide range ofdesign and size is very important in mass production)

System concept depends on function & place of use.

Standard dimensional systemfurniture are produced in parts and therefore these parts should used in the family offurniture!s.

"ontinuity in design for each furniture or in the family of furniture helps in mass production.

Availability of material and material property becomes critical in mass production.

Mass produced furniture!s are machine made. Availability of machinery becomes an important design criterion.

#le$ibility in dismantling and assembling should be considered while designing.

Materials used in mass productionWhat designers need to understand?

%esigners need to understand why one material is better or more appropriate than another for given situation.Should be informed about the newest materials and have a woring nowledge of material properties.Material contributes significantly to the structural integrity' comfort and aesthetics of furniture."onsidering the properties and characteristics of materials in the conception of design focuses the designers thiningupon the limits and constraints of materials' which ironically opens the door to creative design ideas.Materials research focuses upon environmental issues' physical properties' health related concerns and performancerelated characteristics.%igital technology and new materials have an enormous potential to influence the field of furniture design.

What are the material properties the furniture designers need to consider?

Material properties are important to consider when selecting material for furniture.

"haracteristics of material to be considered

. Absorptive uality*. "ellular structure+. "ompressive & ,ensile strength-. %ensity. %imensional change/. %uctility0. 1lasticity2. 1$pandability3. Stability4. Surface uality

. 56" content*. 7orability influence

Materials for Mass production of furnitures in India.

8ndian plywood firms are switching to ecofriendly' cheaper variants lie particle boards and fibre boards'

anticipating rising demand for massproduced furniture.


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Modern massproduced bedroom and sofa sets use particle board and medium density fibre boards (M%#)

while local carpenters almost e$clusively use plywood boarding.

Particle boardis a constructional panel made from lowgrade waste wood

or from plants and shrubs with woody stems.

MDFis made from refined wood or vegetable fibre.

%emand for mass produced furniture is growing in 8ndia as disposable incomes rise and a booming service

sector necessitates setting up and up gradation of offices.

8n plywood' wood recovery is /4 percent.

8n M%# and particle board' it is 34 percent.

7ood recovery is the amount of wood that comes out from the raw material.

,he manufacturing cost for a sheet of M%# is also -4 percent lesser than that of plywood' while particle

boards costs about /4 percent less.Material

Medium-density fiberboard (MDFis an engineered wood product formed by breaing down softwood into woodfibers."ombining it with wa$ and a resin binder' and forming panels by applying high temperature and pressure.8t is made up of separated fibers.9ut can be used as a building material similar in application to plywood.8t is much denser than normal particle board.

,here are different inds of M%#' which are sometimes labeled by colour:

Moisture resistant is typically green #ire retardant M%# is typically red or pin

Another addition to the M%# range is a product named #;


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Decorati%e ply!oodis usually faced with hardwood' includingred oa'birch'maple'lauan (


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Metalluminumis a relatively soft' lightweight metal that can be cast in sand' rolled' e$truded' forged and drawn. %ifficult to

weld.

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"hermoplastics

ong molecular structure called polymerization.,hermoplastics soften when heated and regain their rigidity when cooled.5arious thermoforming processes have been developed.&ine bending

ine bending involves heating a thermoplastic sheet material over a strip heater until it becomes soft and then bendingit to the desired angle. ,he desired angle may be achieved by using a >ig or former' or if the angle is not critical' simplyby bending the thermoplastic sheet by hand and holding it until it cools.

Vacuum formingVacuum forming- is a simplified version ofthermoforming,whereby a sheet of plasticis heated to a formingtemperature, stretched onto or into a single-surface mold, and held against the mold by applying vacuum

between the mold surface and the sheet

,he vacuum forming process can be used to mae most product pacaging' speaer casings and even cardashboards. 5acuum forming is used when an unusual shape lie a Bdish! or a bo$lie shape is needed.

Dip coating


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8n>ection molding is a widely used process in manufacturing. 8t is a uic way of producing large numbers of identicalcomponents such as plastic trays and safety helmets. ,he in>ection mounding machine consists of a heated barrel witha screw feed mechanism that forces molten polymer into a split mould. ,he screw melts the polymer as it the turns andrams it into the mould under very great pressure.

!fter the plastic component in the mould has cooled and solidified sufficiently, the mould is opened and the

component is e"ected

Types of thermoplastics.

materials - mass production

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