DESIGN AND DEVELOPEMENT OF SAFETY GOGGLE
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© 2021 JETIR June 2021, Volume 8, Issue 6 www.jetir.org (ISSN-2349-5162)
DESIGN AND DEVELOPEMENT OF SAFETY
GOGGLE
Abhishek Raj1, Yash Upadhyay2, Akash Wahiwal3, Prof S.P. Dhamone4
1
B.E Student, Department of Mechanical Engineering, SPPU, Pune, P.O. Box 411002, India, abhi22119@gmail.com
2
B.E Student, Department of Mechanical Engineering, SPPU, Pune, P.O. Box 411002, India, yashupadhyay300@gmail.com
3
B.E Student, Department of Mechanical Engineering, SPPU, Pune, P.O. Box 411002, India, wdakash3113@gmail.com
4
Associate professor, Department of Mechanical Engineering, SPPU, Pune, P.O. Box 411002, India,
dhamone.sagar@bharatividyapeeth.edu
Abstract: The safety goggles which are cheap doesn't have a good asthetics and cannot be used with the spectacles. The
injection Moulding machine is a machine that melt plasticize the Moulding material inside the heating cylinder and inject this into
the Mould tool to create the molded product by solidifying inside it. Safety goggles are manufactured using injection Moulding.
In previous injection Moulding processes, it required a manual interference to eject the goggles from mould and when the Mould
used to get wear and tear whole Mould was to be changed which are not cheap. In this paper we have tried to design a Mould with
changeable parts which get easily wear and tear and added an ejector which reduces the manual work. We have designed safety
goggles with more uses and has good impact strength. We have used Siemens NX software to design the Mould. We have used
CATIA, HYPERMESH, and Ls Dyana to do analysis of the Safety goggles.
Keywords: Injection Moulding, Plastic, SIEMENS NX- CAD, Safety Goggles, Hypermesh, Catia, Ls Dyana.
1. INTRODUCTION
Conventional design of Safety goggles has a defect, they are unable to be used with spectacles on. So we are trying in this project
to design a safety goggle with a good impact strength and which can be produced at cheaper costs so that it can be bought by
average customers too. Moulds for safety goggles has a Mould with same material which was a problem in the design, when there
was small wear and tear in the die/ mould whole mould had to be replaced which caused company a great financial loss because
manufacturing a whole new mould requires a lot of machining and a lot of time. The safety goggle mould does not have ejector
pins due to which a manual labour is required to take out the moulded lenses of safety goggles. Injection moulding is one of the
most prevalent technologies used in processing thermoplastic polymers. At the end of the injection moulding cycle, the plastic
moulded part should be ejected when the injection mould opens. So we have tried designing such a mould with such a material
selection that there must be minimum wear and tear. The mould has different parts made of different material which are
replaceable so that whole mould doesn't have to be replaced. And we have used an ejector system in the mould so that manual
labour can be reduced.
1.1. PROBLEM STATEMENT
In these times of pandemic we see a shortages of safety goggles, even if we find it, they can’t be wore on spectacles. The
goggles which are present are very costly. Safety goggles are manufactured using injection moulding process, a manual help is
required to eject the goggles from the mould. And if any small part of mould die gets wear and tear the whole die has to be
replaced. This increases the cost for the company and to manufacture a whole new die consumes a big time.
1.2. OBJECTIVES
1. To design a safety goggle with a good impact strength.
2. To design safety goggles which are able to be wore on spectacles.
3. To reduce the cost of labour by using ejector in the moulds.
4. To reduce the cost of moulds by using different materials for different parts.
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© 2021 JETIR June 2021, Volume 8, Issue 6 www.jetir.org (ISSN-2349-5162)
2. DESIGN & MATERIAL PARAMETERS
1. Design of model
Figures shows the Cad model of the mould and the safety goggle Figs. 1 (a) shows the Cad image of mould assembly. (b) shows
the safety goggle assembly.
(a) (b)
Figure 1. (a) CAD Model (b) Drafting of CAD Model
2. Material properties as per standard
Young’s modulus [MPa] Poisson’s ratio Density [Ton/mm3] Tensile strength at break /yield[MPa]
Material``
2.e^5 1.3228e-9
Poly Carbonate 0.31 58
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© 2021 JETIR June 2021, Volume 8, Issue 6 www.jetir.org (ISSN-2349-5162)
3. Components Used and Dimensions
PROJECT NAME :-
PLASTIC MATERIAL & MOULD WEIGTH/ TONN :-
SAFETY_GOGGLES_CLEAR_LENS -
SHIK :- PC_0.60% 300 KG (Approx)/160T
BOM
MOLD BASE & INSERTS SIZES
SR.NO. DESCRIPTION FINISH SIZE (IN MM) L X W X H MATERIAL & GRADE QTY. REMARKS / ORDER BY
1 MAIN CAVITY INSERT 226.0 X 226.0 X 70.0 STAVAX 1 (46-48 HRC)
2 MAIN CORE INSERT 226.0 X 226.0 X 76.0 STAVAX 1 (46-48 HRC)
3 CAVITY PLATE 406.0 X 336.0 X 96.0 P-20 1 -
4 CORE PLATE 406.0 X 336.0 X 66.0 P-20 1 -
5 SPACER BLOCKS 82.0 X 336.0 X 90.0 C - 45 2 -
6 EJECTOR PLATE 234.0 x 328.0 x 20.0 C - 45 1 -
7 EJECTOR BACK PLATE 234.0 x 328.0 x 16.0 C - 45 1 -
8 TOP PLATE 456.0 X 336.0 X 30.0 C - 45 1 -
9 BOTTOM PLATE 456.0 X 336.0 X 30.0 C - 45 1 -
10 TIE BAR 40.0 x 310.0 x 30.0 MILD STEEL 1 -
MOLD ROUND PART
1 LOCATING RING Ø120 X 15.0 Misumi STD 1 (LRJS120 - 15 – 40)
2 SPRUE BUSH Ø40.0 x 90.0 Misumi STD 1 (SBBYH16 - 120.0 - SR10.5 - 3.5 - A2 – Y 0.6 )
3 MAIN GUIDE PILLER_01 Ø47.0 X 240.0 Misumi STD 3 D-GPM00 - 32 - 135 – 96
4 MAIN GUIDE PILLER_02 Ø47.0 X 240.0 Misumi STD 1 D-GPM00 - 30 - 135 – 96
5 MAIN GUIDE BUSH_01 Ø47.0 X 75.0 Misumi STD 3 D-GBM10 - 42 - 66 -32
6 MAIN GUIDE BUSH_02 Ø47.0 X 75.0 Misumi STD 1 D-GBM10 - 42 - 66 -30
7 TRUST BUTTON Ø26.0 X 15.0 EN-31 4 AS PER 2D DRAWING SEARCH
8 RETURN PINS Ø21.0 X 132 Misumi STD 4 RP8TH16 – 150
9 FINGER PIN Ø 30.0 X 183.0 VIAYDEEP STD 2 VD2.2/012 ( MAIN DIA 25.0 X 200.0)
10 LOCATING BUSH Ø 25.0 X 26.0 Misumi STD 4 D-GBM10 - 15 – 27
11 EJECTORE GUIDE PILLER Ø20.0 X 110.0 Misumi STD 4 ( EGH 20 – 110 )
12 EJECTORE GUIDE BUSH Ø32.0 X 32.0 Misumi STD 4 ( EGBL20 )
13 REST BUTTON Ø22.0 X 6.0 EN-31 8 AS PER 2D DRAWING SEARCH
14 SUPPORT PILLAR Ø40.0 x 90.0 Misumi STD 4 ( SPL 40 – 90)
15 COUPLER BUSH Ø36.0 X 48.0 C - 45 1 AS PER 2D DRAWING SEARCH
16 EJECTOR PIN-01 Ø6.0 X 170.0 Misumi STD 5 EPS6 – 200
17 EJECTOR PIN-02 ( SIDE CORE PINS) Ø4.0 X 100.0 VIAYDEEP STD 6 VATH - 4 X 100 = 6 NOS
18 O RING IN COOLING OD 11.80 X ID 10.0 Misumi STD 6 ORS – 10
19 TAPER INTER LOCK Ø 25.0 X L ( 48+2) Misumi STD 2 ADDED ON TEMPLTES MOULD BOM
VIAYDEEP STD ( COVERT AS
20 BLADE_EJECTOR_ PINS_03 1.50 X 9.5 6 FHS : 10 X 160/80 ( 1.5 X 9.5 )
PER 2D)
SPRING (VG 013-064 C 40% MAX
21 Ø12.50 X 64.0 VIAYDEEP STD 4 12.5 ( VG 013-051) C 40%
COMP-GREEN)
SPRING (VG 032-127 C 40% MAX MODIFIED :- DIA 32.0( VLG 032-89) C
22 Ø32.0 X 89 VIAYDEEP STD 4
COMP-GREEN) 50 % MAX
MOLD CHILD PARTS
1 CORE SLIDER 190.0 X 58.0 X 45.0 EN-31 2 ( 46-52 HRC )
2 WEAGE BLOCK 178.0 X 89.0 X 62.0 EN-31 2 ( 46-52 HRC )
3 WEAR PLATE 188.0 X 90.0 X 11.0 EN-31 2 ( 46-52 HRC )
4 GUIDE RAIL 88.0 X 20.0 X 20.0 EN-31 4 ( 46-52 HRC )
5 STOPPER 42.0 X 36.0 X 30.0 MILD STEEL 2 -
6 PRESS PAD (CORE & CAVITY) 80.0 X 36.0 X 15.0 EN-31 4 ( 46-52 HRC )
7 SLIDER PIN STOPPER 26.0X 26.0 X 8.0 EN-31 4 ( 46-52 HRC )
8 PLATE STOPPER 20 X 60.0 X 12.0 MILD STEEL 2 -
BOLTING & BSP
1 TOP PLT TO CAVITY PLT SOCKET HEAD - M16 X 55.0 STD 6 -
2 CAVITY & CORE INSERT SOCKET HEAD - M8.0 X 40.0 STD 10 -
3 WEAGE BLOCK SOCKET HEAD - M10.0 X 50.0 STD 5
PRESS PAD,THRUST BUTTON,GUIDE
4 SOCKET HEAD - M6.0 X 25.0 STD 32
RAIL
5 WEAR PLATE, REST BUTTON CSK - M6.0 X 15.0 STD 25
SUPPORT PILLAR & E GUIDE PILLAR
6 SOCKET HEAD - M10.0 X 50.0 STD 8
7 SPACER BLCOK SOCKET HEAD - M20 X 150.0 STD 4
8 EECTORE PLATE SOCKET HEAD - M8 X 30.0 STD 8
9 TIE BAR SOCKET HEAD - M16 X 45 STD 2
10 COOLING PLUG 1/4" (DIA 11.80 X 15.0) STD 25
11 COOLING HOSE NIPPLE 1/4" (DIA 11.80 X 15.0) STD 6
12 SAFETY HOIST RING FOR LIFTING AS PER HENKSA - M16 STD 1
NOTE-ALL GIVEN SIZES ARE IN FINISH IN MM
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© 2021 JETIR June 2021, Volume 8, Issue 6 www.jetir.org (ISSN-2349-5162)
4. Meshing of the safety Goggles
Figure 2. 3D (TetraHydron Mesh)
Figure 2. 2D (shell mesh)
5. Input Provided
Weight of goggle:- 370gm
Velocity:- sq. rt.(2*g*h)
sq. rt.(2*9810*1500)
5424.94 mm/s
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6. Results:
Maximum Stress: 50.828< Yield Limit (58 Mpa)
The static minimum value we found is 0.071 and static maximum value we found is 50.828.
Stress Plot- VonMises Stress
The maximum plastic strain we got is 0.028 ie 2.8%
But the standard value for strain is 7-8%
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Diplacement Plot:-
The maximum displacement value we found in the displacement plot is 24.394 mm
3. CONCLUSION
This project helps in designing a safety goggle which is able to use in many industrial and healthcare sectors, these goggles can be
wore on spectacles. The static minimum value we found is 0.071 and static maximum value we found is 50.828. The maximum
plastic strain we got is 0.028 ie 2.8%. Velocity is provided to the safety goggles, as per the stress plot, the stresses induced in the
goggle is: 50.828 MPa which is below the standard yield limit (58 MPa) of the material. And as per the result, structure is safe
ACKNOWLEDGMENTS
We remain immensely obliged to Prof. S.P. Dhamone for providing us moral and technical support and guiding us. Also we
would like to take this opportunity to thank and express our gratitude towards the Principal, H.O.D. & Teaching staff for their
motivation and technical support for carrying out this work.
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