PLASTIC WATER STORAGE TANKS
[EIRI/EDPR/1399] J.C. 176
INTRODUCTION
The term Plastics usually refers to a large and varied group of synthetic materials which are solid in finished form but at some stage in their processing are fluid enough to be shaped by application of heat and pressure. The use of plastics in building has grown rapidly in the last few years. Plastics were first used for decorative and non structural purposes but because of increased knowledge of the long term properties of plastics particularly resistance to creep and environmental effects some plastics are now available that maintain long term structural integrity, such as piping, doors and windows, water tanks that can contain moderate pressures for a long period of time. During the last decade Plastic (conversion) Industry has progressed at a fast rate. New fields of application of plastics are continually being developed. Tile sometime ago drums, barrels were conventionally manufactured out of M.S. Sheets. Today we can get the drum and barrel made out of Plastics. Blow moulding has been the most widely used method of the manufacture of hollow-ware out of thermoplastics. The choice of plastic types and formulations now run in thousands and this diversity indeed appears formidable.
It is easier to cope with this diversity if plastics are considered to be a category of materials like metals embracing different distinct families in which each family, in turn is composed of many individual types. Inspite of the diversity of plastics being great, in practice the choice for a given application will normally lie between a narrow band of plastic spectrum. Within this band there may be several plastics which approximate the desired requirements. Selection of the best one out of these requires weighing and comparing the properties of each. Among thermo plastic, L.D.P.E., L.L.D.P.E., H.D.P.E, P.V.C., Polyethylenes, Polypropylenes etc have entered market with large number of articles of multifarious uses. Big sizes tanks of plastics are manufactured by various methods patronized under molding. Plastic tanks are storage tanks defined as a container for storing liquids and gases. A tank may be made of capacity much bigger than barrel drum and may be of sizes 100 litres to 25,000 litres. The tank may be made of metal, alloys, wood, plastic i.e. H.D.P.E., LLDPE and others depending upon use. Large size water tanks sintex type are being made of plastic material by a unique process known as Rotational molding for making hollow parts especially applicable for making large or complex shapes usually from polyethelene. Plastic tanks are becoming very popular and are finding wider acceptability in every homes as well as industry.
COST ESTIMATION
Plant Capacity 100 Nos/Day
Land & Building (4000 sq.mt.) Rs. 5.30 Cr
Plant & Machinery Rs. 1.94 Cr
Working Capital for 3 Months Rs. 1.77 Cr
Total Capital Investment Rs. 9.24 Cr
Rate of Return 23%
Break Even Point 30%
CONTENTS
INTRODUCTION
PROPERTIES OF PLASTIC TANKS
PROPERTIES OF HDPE WATER TANKS
PLASTICS USED FOR TANK CASTING WITH SPECIFIC PROPERTIES
PHYSICAL PROPERTIES OF PLASTICS
ADVANTAGES OF LLDPE ARE:-
DETAILS OF RAW MATERIALS
B.I.S. SPECIFICATION AND REQUIREMENT
TESTING OF PLASTICS
USES AND APPLICATIONS
MARKET SURVEY
PLASTIC WATER STORAGE TANKS MANUFACTURER/EXPORTERS
SELECTION AND DESCRIPTION OF PROCESS
MANUFACTURING PROCESS OF PLASTIC WATER STORAGE TANK
OVER VIEW OF ROTATIONAL MOULDING PROCESS
PRODUCTION PROCESS
PROCESS FLOW DIAGRAM
HISTORY
EQUIPMENT AND TOOLING
STANDARD SETUP AND EQUIPMENT FOR ROTATIONAL MOLDING
ROTATIONAL MOLDING MACHINES
RECENT IMPROVEMENTS IN ROTATIONAL MOULDING
RECENT IMPROVEMENTS
LIMITATIONS
MATERIAL REQUIREMENTS
MOULD RELEASE AGENTS AND MATERIALS FOR ROTATIONAL MOULDING
MOLD RELEASE AGENTS
MATERIALS
DESIGN CONSIDERATION FOR ROTATIONAL MOULDING
PRODUCT DESIGN
DESIGNING FOR ROTATIONAL MOLDING
MATERIAL LIMITATIONS AND CONSIDERATIONS
WALL THICKNESS
LIST OF PRODUCT, MADE USING THE SAME PRODUCTION UNIT
ADVANTAGES AND LIMINATION OF ROTATIONAL MOULDING
MATERIAL TESTING AND PREPARATION OF POLYMER
DETAILS OF EQUIPMENT, USED IN THE PROCESS
DETAILS OF MOULDS & MOULDING
SUPPLIERS OF RAW MATERIALS
SUPPLIERS OF PLANT & MACHINERY
COMPLETE PLANT AND MACHINERY SUPPLIER
PLANT LAYOUT
APPENDIX – A:
01. PLANT ECONOMICS
02. LAND & BUILDING
03. PLANT AND MACHINERY
04. OTHER FIXED ASSESTS
05. FIXED CAPITAL
06. RAW MATERIAL
07. SALARY AND WAGES
08. UTILITIES AND OVERHEADS
09. TOTAL WORKING CAPITAL
10. TOTAL CAPITAL INVESTMENT
11. COST OF PRODUCTION
12. TURN OVER/ANNUM
13. BREAK EVEN POINT
14. RESOURCES FOR FINANCE
15. INSTALMENT PAYABLE IN 5 YEARS
16. DEPRECIATION CHART FOR 5 YEARS
17. PROFIT ANALYSIS FOR 5 YEARS
18. PROJECTED BALANCE SHEET FOR (5 YEARS)
