Investment casting, also known as lost-wax casting, is an industrial process over 5,000 years old for producing metal components. It involves creating a wax pattern, coating it with ceramic slurry to create an investment mold, heating to melt out the wax, and pouring molten metal into the mold cavity. The process produces parts with precision and complexity in a variety of metals. Common applications include aircraft components and aluminum/steel castings up to 30/300 kg respectively. It has lower startup costs than die casting but can make shapes difficult for die casting with little finishing needed.
Feldspar is a common raw material used in glassmaking, ceramics, and to some extent as a filler and extender in paint, plastics, and rubber. Feldspar grinding mill is mainly applied to grind non-inflammable, non-explosive and brittle materials with Mohs hardness under six.
Feldspar is a common raw material used in glassmaking, ceramics, and to some extent as a filler and extender in paint, plastics, and rubber. Feldspar grinding mill is mainly applied to grind non-inflammable, non-explosive and brittle materials with Mohs hardness under six.
All the process and flowchart of Lost wax casting with example and details working Process.
Made by:
Shaiful islam majumder
Dhaka University of Engineering & Technology(DUET)
A mould is a hollowed-out block that is filled with a liquid like plastic, glass, metal, or ceramic raw materials .The liquid hardens or sets inside the mould, adopting its shape. A mould is the counterpart to a cast.
Mould or Mould cavity contains molten metal and is essentially a negative of the final product.
Mould is obtained by pattern in moulding material (sand).
Mould material should posses refractory characteristics and withstand the pouring temperature.
Preparing a metal specimen for microscopic examination Saif al-din ali
1.Name of Experiment:
Preparing a Metal Specimen for Microscopic Examination.
2.The objective of the Experiment
a. The determination of the size and shape of the grains.
b. To specify what forms are present.
c. To find if the specimen has undergone plastic or elastic deformation.
d. To search for impurities.
e. To find if it has inferior any phase changes
This PPT will let you know about metal casting and more specifically about the type of casting that is, Die casting, types of die casting, Cleaning of castings and inspection of casting
Casting procedures are the backbone of indirect restorations. No casting can be fabricated with their casting defects. It is necessary to have the knowledge of casting defects , how they occure, and how to prevent them.
Casting procedures /certified fixed orthodontic courses by Indian dental aca...Indian dental academy
The Indian Dental Academy is the Leader in continuing dental education , training dentists in all aspects of dentistry and offering a wide range of dental certified courses in different formats.
Indian dental academy provides dental crown & Bridge,rotary endodontics,fixed orthodontics,
Dental implants courses.for details pls visit www.indiandentalacademy.com ,or call
0091-9248678078
All the process and flowchart of Lost wax casting with example and details working Process.
Made by:
Shaiful islam majumder
Dhaka University of Engineering & Technology(DUET)
A mould is a hollowed-out block that is filled with a liquid like plastic, glass, metal, or ceramic raw materials .The liquid hardens or sets inside the mould, adopting its shape. A mould is the counterpart to a cast.
Mould or Mould cavity contains molten metal and is essentially a negative of the final product.
Mould is obtained by pattern in moulding material (sand).
Mould material should posses refractory characteristics and withstand the pouring temperature.
Preparing a metal specimen for microscopic examination Saif al-din ali
1.Name of Experiment:
Preparing a Metal Specimen for Microscopic Examination.
2.The objective of the Experiment
a. The determination of the size and shape of the grains.
b. To specify what forms are present.
c. To find if the specimen has undergone plastic or elastic deformation.
d. To search for impurities.
e. To find if it has inferior any phase changes
This PPT will let you know about metal casting and more specifically about the type of casting that is, Die casting, types of die casting, Cleaning of castings and inspection of casting
Casting procedures are the backbone of indirect restorations. No casting can be fabricated with their casting defects. It is necessary to have the knowledge of casting defects , how they occure, and how to prevent them.
Casting procedures /certified fixed orthodontic courses by Indian dental aca...Indian dental academy
The Indian Dental Academy is the Leader in continuing dental education , training dentists in all aspects of dentistry and offering a wide range of dental certified courses in different formats.
Indian dental academy provides dental crown & Bridge,rotary endodontics,fixed orthodontics,
Dental implants courses.for details pls visit www.indiandentalacademy.com ,or call
0091-9248678078
Academic presentation prepared for the final professional of BDS. The presentation talks about casting and investing techniques used in the Conservative Dentistry and Endodontics.
Porous ceramics offer a broad range of characteristics that enable them to be used in a wide variety of applications. By selecting a suitable base
material for the intended use, and then adjusting the overall porosity, pore size distribution and pore shape, they can be tailored to suit a diverse range of applications. This generally requires close consultation
between the ceramics manufacturer and the customer or user.
Insulation _refractories,Purpose of Insulation,Types and Application,Economic Thickness of Insulation (ETI). Simplified Formula for Heat Loss Calculation, Refractories, Properties of Refractories,Classification of Refractories,Selection of Refractories, Heat Losses from Furnace Walls
00923006902338
Compressor Types
Compressor Performance
Compressed Air System Components
Efficient Operation of Compressed Air Systems
Compressor Capacity Assessment
Checklist for Energy Efficiency in Compressed Air System
00923006902338
Lab Layout
Study of construction details and working of lathe trainer
Study of Chemical machining and process of chemical machining
Roughing and Finishing Program - Rectangular Pocket
One Step Finishing Cycle Program - Rectangular Pocket
Write a G-Code Program for the Part Shown Below
A typical round part used for CNC programming and machining.
Circular pocket cutting
Slot milling
Slot finishing
00923006902338
Safety Inspections and Sample Safety Inspection.Health and safety training D...Salman Jailani
Safety Inspections and Sample Safety Inspection.Health and safety training Definition of risk WHAT ARE PERMITS-TO-WORK
Mechanical Engineering
00923006902338
We have compiled the most important slides from each speaker's presentation. This year’s compilation, available for free, captures the key insights and contributions shared during the DfMAy 2024 conference.
TOP 10 B TECH COLLEGES IN JAIPUR 2024.pptxnikitacareer3
Looking for the best engineering colleges in Jaipur for 2024?
Check out our list of the top 10 B.Tech colleges to help you make the right choice for your future career!
1) MNIT
2) MANIPAL UNIV
3) LNMIIT
4) NIMS UNIV
5) JECRC
6) VIVEKANANDA GLOBAL UNIV
7) BIT JAIPUR
8) APEX UNIV
9) AMITY UNIV.
10) JNU
TO KNOW MORE ABOUT COLLEGES, FEES AND PLACEMENT, WATCH THE FULL VIDEO GIVEN BELOW ON "TOP 10 B TECH COLLEGES IN JAIPUR"
https://www.youtube.com/watch?v=vSNje0MBh7g
VISIT CAREER MANTRA PORTAL TO KNOW MORE ABOUT COLLEGES/UNIVERSITITES in Jaipur:
https://careermantra.net/colleges/3378/Jaipur/b-tech
Get all the information you need to plan your next steps in your medical career with Career Mantra!
https://careermantra.net/
ACEP Magazine edition 4th launched on 05.06.2024Rahul
This document provides information about the third edition of the magazine "Sthapatya" published by the Association of Civil Engineers (Practicing) Aurangabad. It includes messages from current and past presidents of ACEP, memories and photos from past ACEP events, information on life time achievement awards given by ACEP, and a technical article on concrete maintenance, repairs and strengthening. The document highlights activities of ACEP and provides a technical educational article for members.
Hierarchical Digital Twin of a Naval Power SystemKerry Sado
A hierarchical digital twin of a Naval DC power system has been developed and experimentally verified. Similar to other state-of-the-art digital twins, this technology creates a digital replica of the physical system executed in real-time or faster, which can modify hardware controls. However, its advantage stems from distributing computational efforts by utilizing a hierarchical structure composed of lower-level digital twin blocks and a higher-level system digital twin. Each digital twin block is associated with a physical subsystem of the hardware and communicates with a singular system digital twin, which creates a system-level response. By extracting information from each level of the hierarchy, power system controls of the hardware were reconfigured autonomously. This hierarchical digital twin development offers several advantages over other digital twins, particularly in the field of naval power systems. The hierarchical structure allows for greater computational efficiency and scalability while the ability to autonomously reconfigure hardware controls offers increased flexibility and responsiveness. The hierarchical decomposition and models utilized were well aligned with the physical twin, as indicated by the maximum deviations between the developed digital twin hierarchy and the hardware.
Literature Review Basics and Understanding Reference Management.pptxDr Ramhari Poudyal
Three-day training on academic research focuses on analytical tools at United Technical College, supported by the University Grant Commission, Nepal. 24-26 May 2024
Using recycled concrete aggregates (RCA) for pavements is crucial to achieving sustainability. Implementing RCA for new pavement can minimize carbon footprint, conserve natural resources, reduce harmful emissions, and lower life cycle costs. Compared to natural aggregate (NA), RCA pavement has fewer comprehensive studies and sustainability assessments.
NUMERICAL SIMULATIONS OF HEAT AND MASS TRANSFER IN CONDENSING HEAT EXCHANGERS...ssuser7dcef0
Power plants release a large amount of water vapor into the
atmosphere through the stack. The flue gas can be a potential
source for obtaining much needed cooling water for a power
plant. If a power plant could recover and reuse a portion of this
moisture, it could reduce its total cooling water intake
requirement. One of the most practical way to recover water
from flue gas is to use a condensing heat exchanger. The power
plant could also recover latent heat due to condensation as well
as sensible heat due to lowering the flue gas exit temperature.
Additionally, harmful acids released from the stack can be
reduced in a condensing heat exchanger by acid condensation. reduced in a condensing heat exchanger by acid condensation.
Condensation of vapors in flue gas is a complicated
phenomenon since heat and mass transfer of water vapor and
various acids simultaneously occur in the presence of noncondensable
gases such as nitrogen and oxygen. Design of a
condenser depends on the knowledge and understanding of the
heat and mass transfer processes. A computer program for
numerical simulations of water (H2O) and sulfuric acid (H2SO4)
condensation in a flue gas condensing heat exchanger was
developed using MATLAB. Governing equations based on
mass and energy balances for the system were derived to
predict variables such as flue gas exit temperature, cooling
water outlet temperature, mole fraction and condensation rates
of water and sulfuric acid vapors. The equations were solved
using an iterative solution technique with calculations of heat
and mass transfer coefficients and physical properties.
Water billing management system project report.pdfKamal Acharya
Our project entitled “Water Billing Management System” aims is to generate Water bill with all the charges and penalty. Manual system that is employed is extremely laborious and quite inadequate. It only makes the process more difficult and hard.
The aim of our project is to develop a system that is meant to partially computerize the work performed in the Water Board like generating monthly Water bill, record of consuming unit of water, store record of the customer and previous unpaid record.
We used HTML/PHP as front end and MYSQL as back end for developing our project. HTML is primarily a visual design environment. We can create a android application by designing the form and that make up the user interface. Adding android application code to the form and the objects such as buttons and text boxes on them and adding any required support code in additional modular.
MySQL is free open source database that facilitates the effective management of the databases by connecting them to the software. It is a stable ,reliable and the powerful solution with the advanced features and advantages which are as follows: Data Security.MySQL is free open source database that facilitates the effective management of the databases by connecting them to the software.
Water billing management system project report.pdf
Investment casting and brazing and soldering and press forging
1. Investment casting
Investment casting is an industrialprocess based on and
also called lost-wax casting, one of the oldest known
metal-forming techniques .From 5,000 years ago, when
bees wax formed the pattern, to today’shigh-technology
waxes, refractory materialsand specialist alloys, the
castings allow the productionof componentswith
accuracy, repeatability,versatilityand integrity in a variety
of metals and high-performance alloys.
The process is generally used for small castings, but has
been used to produce complete aircraft door frames,
steel castings of up to 300 kg (660 lbs) and aluminium
castings of up to 30 kg (66 lbs). It is generally more
expensive per unit than die casting or sand casting, but
has lower equipment costs. It can produce complicated
shapes that would be difficult or impossible with die
casting, yet like that process, it requires little surface
finishingand only minor machining..
Produce a master pattern:
An artist or mould-makercreates an original pattern
from wax, clay, wood, plastic, steel, or another
material….!!!
2. Mould making:
A mould, known as the master die, is made of the master
pattern. The master pattern may be made from a low-
melting-pointmetal, steel, or wood. If a steel pattern was
created then a low-melting-pointmetal may be cast
directly from the master pattern. Rubber mouldscan also
be cast directly from the master pattern. The first step
may also be skipped if the master die is machined directly
into steel.
Produce the wax patterns:
Although calleda wax pattern, pattern materials also
includeplastic and frozen mercury. Wax patterns may be
produced in one of two ways. In one process the wax is
poured into the mold and swished arounduntil an even
coating, usually about 3 mm (0.12 in) thick, covers the
inner surface of the mould. Thisis repeated until the
desired thickness is reached. Another method is filling the
entire mould with molten wax, and let it cool, until a
desired thickness has set on the surface of the mould.
After this the rest of the wax is poured out again, the
mould is turned upside down and the wax layer is left to
cool and harden. With this method it is more difficult to
control the overall thickness of the wax layer
3. Assemble the wax patterns:
The wax pattern is then removed from the mould.
Dependingon the applicationmultiple wax patterns may
be created so that they can all be cast at once. In other
applications,multipledifferent wax patterns may be
created and then assembled into one complex pattern. In
the first case the multiplepatterns are attachedto a wax
sprue, with the result known as a pattern cluster, or tree;
as many as several hundredpatterns may be assembled
into a tree. Foundries often use registration marks to
indicateexactly where they go. The wax patterns are
attached to the sprue or each other by means of a heated
metal tool. The wax pattern may also be chased, which
means the parting line or flashing are rubbed out using the
heated metal tool. Finallyit is dressed, which means any
other imperfections are addressed so that the wax now
looks like the finished piece.
Investment:
The ceramic mould, known as the investment, is produced
by three repeating steps: coating, stuccoing, and
hardening. The first step involves dippingthe cluster into
a slurry of fine refractory material and then letting any
excess drain off, so a uniform surface is produced. This
4. fine material is used first to give a smooth surface finish
and reproduce fine details. In the second step, the cluster
is stuccoed with a coarse ceramic particle, by dippingit
into a fluidised bed, placing it in a rainfall-sander,or by
applyingby hand. Finally,the coating is allowedto
harden. These steps are repeated until the investment is
the required thickness, which is usually5 to 15 mm
De wax:
The investment is then allowedto completely dry, which
can take 16 to 48 hours. Drying can be enhanced by
applyinga vacuum or minimizing the environmental
humidity.It is then turned upside- down and placed in a
furnace or autoclave to melt out and/or vaporize the wax.
Most shell failures occur at this point because the waxes
used have a thermal expansion coefficient that is much
greater than the investment material surrounding it, so as
the wax is heated it expands and induces great stresses. In
order to minimize these stresses the wax is heated as
rapidlyas possible so that the surface of the wax can melt
into the surface of the investment or run out of the mold,
which makes room for the rest of the wax to expand. In
certain situationsholes may be drilledinto the mold
beforehand to help reduce these stresses. Any wax that
runs out of the mold is usuallyrecovered and reused.
5. Burnout & preheating:
The mold is then subjected to a burnout, which heatsthe
mold between 870C & 1095 C to remove any moisture
and residual wax, and to sinter the mold. Sometimes this
heating is also used as the preheat, but other times the
mold is allowedto cool so that it can be tested. If any
cracks are found they can be repaired with ceramic slurry
or special cements. The mold is preheated to allow the
metal to stay liquidlonger to fill any detailsand to
increase dimensional accuracy, because the mold and
casting cool together
Pouring:
The investment mold is then placedcup-upwards into a
tub filled with sand. The metal may be gravity poured, but
if there are thin sections in the mold it may be filledby
applyingpositive air pressure, vacuum cast, tilt cast,
pressure assisted pouring
or centrifugal cast
Removal:
The shell is hammered, media blasted, vibrated,
waterjeted, or chemicallydissolved (sometimes with
6. liquidnitrogen) to release the casting. The sprue is cut off
and recycled. The casting may then be cleaned up to
remove signs of the casting process, usually
by grinding
Q No 2
QNo 3 .Inspection and Testing Methods
• Visual inspection
• Nondestructive evaluation
• Destructive testing
7. Visual inspection
Most widely used welding inspection method
Human inspector visuallyexamines for:
1 Conformance to dimensions, wWarpage
2 Cracks, cavities, incomplete fusion, and other surface
defects
Limitations:
1 Only surface defects are detectable
2 Welding inspector must also decide if additionaltests are
warranted
Nondestructive evaluation
• Ultrasonic testing - high frequency sound waves through
specimen to detect cracks and inclusions
• Radiographictesting - x-rays or gamma radiation provide
photographof internalflaws
• Dye-penetrant and fluorescent-penetrant tests - to detect
small cracks and cavities at part surface
• Magnetic particle testing – iron filings sprinkled on surface
reveal subsurface defects by distorting magnetic field in
part
8. Destructive testing
Tests in which weld is destroyed either during testing or
to prepare test specimen
• Mechanicaltests - purpose is similar to conventional
testing methods such as tensile tests, shear tests, etc
• Metallurgicaltests - preparation of metallurgical
specimens (e.g., photomicrographs) of weldment to
examine metallicstructure, defects, extent and condition
of heat affected zone, and similar phenomena
Permanentmold casting
A metal casting process that employs reusable molds ("permanent
molds"),usually made from metal. The most commonprocessuses gravity
to fill the mold, however gas pressure or a vacuum are also used.
There are four main types of permanentmold casting:gravity, slush,
low-pressure,and vacuum.
9. Definition of press forging:
a forging produced between dies by pressure (as of a
hydraulic press or a drop hammer)
The key difference between impact forging and press
forging is that in the former method a
sudden impact force is applied on the die, while in the
latter method a gradually increasing pressure is applied
on the die.