Specification of Paper Shredder Machine

Specification of Paper Shredder Machine - Paper shredder used to cut the paper until it reaches a certain size according to the capacity and type of blade. More detailed explanation of the importance of this machine, the basic concept of machine, the working principle, machine construction and operation can be found in the article on the paper shredder description. (Read more: description of the paper shredder machine) In this article are described in greater detail about the specifications of the machine and its main components such as the functions of components, the material used, the working principle and position on the machine. The machine specification especially with regard to material and dimensions is obtained based on the calculation and design of machine through the existing formulas in an article on the paper shredder design. (Read more: design of paper shredder machine)

General specifications of the paper shredder machine

Paper shredder machine is driven by electric motors powered 200 Watt, 1 phase, 220 Volt and 1450 rpm. This machine is able to cut the paper in the vertical direction with a width of 5 mm and cut the paper in the horizontal direction with a length of 30 mm, in other words the output of this machine is the size of the shredded paper 30 x 5 mm. Paper specifications are able to be cut by this machine is a sheet of A4 size paper with HVS, a maximum of 80 gms and a maximum of 10 sheets per cycle. Transmission ratio between an electric motor with a shredder blade is 1/96 means maximum rotation reaches 15 rpm shredder blade or cutting the rate of 1,5 m/min (24 mm/s). With these speeds, the machine is able to work at 300 cycles/hour of speed, so that the maximum capacity of this machine is 3000 sheets/hour.

This paper shredder machine consists of three main parts: the machine construction, transmission systems and cutting system with the specifications described below.

Construction of the paper shredder machine

The machine construction is the main part of the paper shredder machine that serves as the base or foundation for other machine components, especially moving parts. Construction machine consists of machine frame, left base, right base, shredder support and gear support. Machine frame is used to support all components of the paper shredder machine. The machine frame is made of steel angle-shaped profile with a size of 25 x 25 x 3 mm which is connected through welding process. The material used for the machine frame is ASTM A36 so that the welding process can use arc welding with electrodes E 6013 specification means having a maximum tensile strength of 60,000 lb/in2 or 42 kg/mm2.

Left base serves as anchoring the left side of main shaft while the right base serves as anchoring the right side of main shaft, the holder of gear transmission and an electric motor mounting. Left base and right base made of ASTM A36 steel plate with a thickness of 3 mm formed by laser cutting process. Left base and right base mounted on the machine frame by using a standard M4 bolt connection size. On the left base and right base is also fitted deep groove ball bearing code 6000 have reached 10220 hours life time on the reliability factor of 99%. (Read more: ball bearings selection guide). The main shaft will be installed on the both bearing with the aim that the main shaft can rotate stably with a low level of friction.

Shredder support mounted between the left and right base. Shredder support serves to hold the base on top side and the static blade holder. Gear support is mounted on the front of the right base. Gear support serves to hold the transmission gears. Shredder support and support gear is made of ASTM A36 steel plate with a thickness of 2 mm formed by laser cutting and bending processes.

Transmission of the paper shredder machine

The transmission system is one of the main parts of the paper shredder machine that serve to forward rotation or power from the electric motor to the cutting system. Transmission system uses a series of gears with a certain ratio to reduce the rotation (gear reducer). The transmission system consists of helical gears and spur gear. Helical gears serve to forward and reduce direct rotation of the electric motor. Why is selected helical gear? The helical gear is more secure and able to withstand axial and radial force at high speed. (Read more: calculation of helical gear). Helical gear transmission uses gear ratio of 1/6 with 1,5 module and helix angle of 10 degree.

The next transmission is spur gears. Why is selected spur gear? Spur gears appropriate for low rotation and high torque. Spur gear transmission on the paper shredder machine is made of two stages with different modules according to the results of calculation. Spur gear transmissions are forward and decrease the rotation of helical gears to the main gear. (Read more: calculation of spur gear) Spur gear 1st stage transmission uses gear ratio of 1/4 with 1,5 module while the spur gear 2nd stage transmission uses gear ratio of 1/4 with 2 module.

Cutting system of the paper shredder machine

Cutting system is one of the main parts of the paper shredder machine that serves as the cutting tool on the vertical and horizontal direction. The system consists of the main shaft, dynamic cutting blades, static cutting blades and main gear. The main shaft serves as the cutting blade holder. The main shaft has a square shape in the position of cutting blade holder and has a round shape at both ends in the position of the holder main bearings and gears. (Read more: shaft calculation). The main shaft is made of VCN 150 or AISI 4340 materials with a minimum diameter of 20 mm.

Dynamic cutting blade is round-shaped blade with 4 (four) the cutting edge, given a square-shaped hole in the middle, mounted on the main shaft and main shaft move together. This blade is used to cut the paper in vertical and horizontal directions. Static cutting blade is square-shaped knife, a hole is round, loosely mounted on the main shaft and the part is not rotating (static). This blade is used to cut the paper in the horizontal direction and is used as a spacer or barrier between the dynamic cutting blades. Cutting blades are designed with tool steel material (HSS-High Speed Steel) with the specification are 112 pieces of blade, 2 mm of blade thickness and 60-degree of cutting angle.

The main gear consists of two spur gears paired with the size (number of teeth and modules) the same. One spur gear mounted on the rear main shaft and direct contact with the transmission spur gears previous. Another spur gear mounted on the front main shaft. The spur gears are drive two main shaft with a rotation in the opposite direction.

That is a description about Specification of Paper Shredder Machine. If you find misconceptions in this post, please provide the correction in the comment box.