Development Of Mechanized Shredding, Melting, And Molding Machine For Plastics/ Levy F. Arcueno Jr., Maria Joangeleen D. Caronan, Genole Jed S. Delos Reyes, Axle M. Hingada, Massie P. Pajarillo and David Raphael P. Santos.--

Bachelor's thesis

College of Industrial Technology.-- Bachelor of Engineering Technology Major in Dies and Mould Technology: Technological University of the Philippines, Manila. 2023

Includes bibliographic references and index.

Manufacturers used plastic injection molding to produce a variety of affordable
construction parts and products, such as hand tools, fasteners, and large and small
accessories. However, plastic molding is usually done only on large machines. The study
aims to develop a mechanized shredding, melting, molding machine for plastics to create
a single-design cavity mold made from plastic materials. The prototype serves as a
multipurpose machine where the worker just pours the right amount of the plastic materials
into the feed hopper of the shredder and then powers it on. Then, let the machine do the
work without exerting too much energy work then when the mold cooled down it can be
taken out from the mold chamber to get the final product. Viable inputs were used to
formulate the electrical diagram, process flow, and prototype assembly. The machine was
fabricated using MS square tube 2” x 2” x 4 MMT and Stainless steel 304 Material which
are the standard materials required in the development of the machine. Upon deployment,
the machine was tested for its functionality and effectiveness. The shredding mechanism
was tested for its shredding time per PET bottle with an average time of 4:52 minutes and
for HDPE bottles with an average time of 9:59 minutes. The melting mechanism was also
tested for 3 different sample trials per plastic type. The average output value of temperature
controller 1 is 167°C and the average output value of temperature controller 2 is 175°C for
PET plastics. For HDPE plastics, the average output value of temperature controller 1 is
184°C, and the average output value of temperature controller 2 is 200°C. The prototype
was evaluated by 35 respondents in Incorporation and Universities and was rated 4.6, with
a very good descriptive rating. The prototype was functional, but it only partially solves
the issue of plastic waste because the molten plastic can easily be cooled down. After all,
the nozzle doesn't have a heater band wrapped directly around it. The control panel also
requires rewiring and the setting up of a trip wire to ensure that the output values of
temperature controllers 1 and 2 do not exceed their input values.