stapler designing

2. A stapler is a mechanical device that joins sheets of
paper or similar material by driving a thin metal
staple through the sheets and folding the ends.
Staplers are widely used in government, business,
offices, homes and schools.
The word "stapler" can actually refer to a number of
different devices of varying uses. In addition to
joining paper sheets together

3. A stapler comprises many components, most of which are
metal stampings and spring type parts. Main components
of a typical home or office stapler include the base; the
anvil (the metal plate over which you put the document that
you want to staple); the magazine (which holds the
staples); the metal head (which covers the magazine); and
the hanger (which is welded to the base and holds the pin
that connects the magazine and base). Rivets are used to
keep the parts together, and a pin is the hinge point for the
top and bottom half. There are also rubber and plastic
materials used both in enhancing the product and in
making the stapler cosmetically appealing.

4. Forming the springs
Stamping of parts
Rivets
Creating plastic moldings
Making the pin
Painting
Assembly

5. Two types of springs are used in the basic stapler.
1. the coil
2. the leaf.
A coil spring is made from metal that has the ability to withstand a constant
pressure and release and still maintain its shape. The coil spring material is
wound around an appropriately
Leaf springs, which resemble a diving board, are typically
made by either bending or rolling a thin piece of steel and then carefully
heating it to a temperature that will cause internal stresses.
Stamping of parts
Stampings are typically made of flat sheet metal material of varying
thicknesses that are sandwiched between a punch and die. When the
punch pushes on the material, it "shears" a piece of material (the
shape of the punch) out of the sheet.

6. Rivets
Creating plastic moldings
A rivet is usually made of a fairly strong steel material, but it must also have
some elasticity. A rivet is designed to hold parts in place just like a screw and
nut, except that the rivet is one piece and cannot be easily disassembled.
One end typically has a head on it (like a nail or a screw), and the other end
is usually hollow
Plastic parts of staplers are made by injection molding, in which a liquified
plastic is injected into a die. The liquid flows into the open void and is then
cooled. As the die cools, the plastic solidifies and takes on the shape of the
die. The die is opened and the part is removed.

7. Making the pin
Painting
Assembly
The pin is little more than a piece of bar stock, cut off to a certain length
either with a saw or on a machining center. Because the pin is used as a
hinge point for the top and bottom half of the stapler, it is usually made from
a strong, heat-treatable metal.
As required to prevent rust, or for cosmetic reasons, some of the
components are painted. The parts are hung on small racks, set on a
conveyor and passed by a spray nozzle. Some automatic painting
operations employ electrostatic spraying, wherein the parts and paint are
electrically charged.
The pins, stampings, and springs are subassembled in stages and then
assembled together with the upper and lower halves of the stapler frame.

8. Samples of all the
components are tested
individually as they are
manufactured. A certain
percentage of parts are
thoroughly checked as they
come off of the automatic
machines. Critical
dimensions are scrutinized
and adjustments are made to
the machines or the tools are
repaired/replaced as they

9. Staplers, like most other mechanisms, are continually adjusted
and improved upon. As new materials and processes are
developed, many uses become incorporated into all kinds of
products, the stapler is no exception. Likewise the use for
staplers will continue to increase as one of the latest uses is in
the medical field as a substitute for stitches.