Download GTU (Gujarat Technological University) BE/BTech (Bachelor of Engineering / Bachelor of Technology) 2018 Winter 7th Sem New 2172302 Plastics Mold And Die Design Previous Question Paper
Seat No.: ________ Enrolment No.___________
GUJARAT TECHNOLOGICAL UNIVERSITY
BE - SEMESTER ?VII (NEW) EXAMINATION ? WINTER 2018
Subject Code: 2172302 Date: 15/11/2018
Subject Name: Plastics Mold & Die Design
Time: 10:30 AM TO 01:30 PM Total Marks: 70
Instructions:
1. Attempt all questions.
2. Make suitable assumptions wherever necessary.
3. Figures to the right indicate full marks.
MARKS
Q.1 (a) Define : Mould ; Insert ; Guide pin 03
(b) Fill in the blanks:
1. Material of guide pin is ____________
2. Rectangular edge gate cannot be used for _____
3. Minimum diameter of a runner is ___________
4. Ring gate is used for ____________________
04
(c) For the product shown in fig[a], design a hand injection mould . Show
all calculations
07
Q.2 (a) Discuss the importance of Lathe machine in a plastics mould making
shop.
03
(b) For the product shown in fig[b], write down step by step machining 04
(c) For the mould designed above, draw both plan and elevation in graph
paper.
07
OR
(c) Discuss Pin Ejection in detail 07
Q.3 (a) For the product shown in fig[c],suggest and design suitable gate 03
(b) Calculate the efficiency of full round, half round, trapezoidal and
hexagonal runners.
04
(c) The shot capacity of an Injection moulding machine is 300 gms. It is
desired to mould the product shown in fig.[a] on this machine. Work
out the no.of impressions that can be moulded on this machine.
Bulk factor of PS = 1.4
Bulk factor of PP = 1.9
Specific gravity of PS= 1.04
Specific gravity of PP = 0.9
07
OR
Q.3 (a) Classify Extrusion Dies 03
(b) Discuss the requirements of Runner and Gate 04
(c) Discuss advantages, disadvantages and applications of Pin Gate;
Submarine Gate ; Overlap gate ; rectangular edge gate; tab gate ; ring
gate and diaphragm gate.
07
Q.4 (a) Discuss the functions of grinding machine in Mould making shops 03
(b) Discuss difference between integer and insert bolster type of moulds. 04
(c) Calculate the shot capacity of the injection moulding machine if a
product of weight 25 gms is to be moulded in ABS and a 10
impression mould is desired. Assume:
Bulk factor of PS = 1.9
Bulk factor of ABS = 1.8
Specific gravity of PS = 1.04
Specific gravity of ABS= 1.0
07
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1
Seat No.: ________ Enrolment No.___________
GUJARAT TECHNOLOGICAL UNIVERSITY
BE - SEMESTER ?VII (NEW) EXAMINATION ? WINTER 2018
Subject Code: 2172302 Date: 15/11/2018
Subject Name: Plastics Mold & Die Design
Time: 10:30 AM TO 01:30 PM Total Marks: 70
Instructions:
1. Attempt all questions.
2. Make suitable assumptions wherever necessary.
3. Figures to the right indicate full marks.
MARKS
Q.1 (a) Define : Mould ; Insert ; Guide pin 03
(b) Fill in the blanks:
1. Material of guide pin is ____________
2. Rectangular edge gate cannot be used for _____
3. Minimum diameter of a runner is ___________
4. Ring gate is used for ____________________
04
(c) For the product shown in fig[a], design a hand injection mould . Show
all calculations
07
Q.2 (a) Discuss the importance of Lathe machine in a plastics mould making
shop.
03
(b) For the product shown in fig[b], write down step by step machining 04
(c) For the mould designed above, draw both plan and elevation in graph
paper.
07
OR
(c) Discuss Pin Ejection in detail 07
Q.3 (a) For the product shown in fig[c],suggest and design suitable gate 03
(b) Calculate the efficiency of full round, half round, trapezoidal and
hexagonal runners.
04
(c) The shot capacity of an Injection moulding machine is 300 gms. It is
desired to mould the product shown in fig.[a] on this machine. Work
out the no.of impressions that can be moulded on this machine.
Bulk factor of PS = 1.4
Bulk factor of PP = 1.9
Specific gravity of PS= 1.04
Specific gravity of PP = 0.9
07
OR
Q.3 (a) Classify Extrusion Dies 03
(b) Discuss the requirements of Runner and Gate 04
(c) Discuss advantages, disadvantages and applications of Pin Gate;
Submarine Gate ; Overlap gate ; rectangular edge gate; tab gate ; ring
gate and diaphragm gate.
07
Q.4 (a) Discuss the functions of grinding machine in Mould making shops 03
(b) Discuss difference between integer and insert bolster type of moulds. 04
(c) Calculate the shot capacity of the injection moulding machine if a
product of weight 25 gms is to be moulded in ABS and a 10
impression mould is desired. Assume:
Bulk factor of PS = 1.9
Bulk factor of ABS = 1.8
Specific gravity of PS = 1.04
Specific gravity of ABS= 1.0
07
2
OR
Q.4 (a) Write about functions of Milling machine 03
(b) Differentiate between shaping and planning. 04
(c) A rectangular box molded in LDPE has dimensions of
185x125x40mm. Top open, this box has wall thickness of 2mm
throughout. If a 2 impression mould is desired , do the feed system
calculations
07
Q.5 (a) Discuss applications of ring gate 03
(b) Discuss about submarine gates. 04
(c) Tick the correct answer:
1. Material of bolster is [a] EN-8 [b] M.S. [c] OHNS
2. Material of guide pin is [a] M.S. [b] EN-24 [ c] EN-8 [d]
OHNS
3. For PVC , Gate preferred in multi impression moulds is [ a]
Ring gate [b] Rectangular edge gate [c] Round Edge gate [d]
Fan Gate
4. 4. Function of Shaping machine is [a] make holes in plate [b]
make concave shapes [c] level the plate from all sides [d]
facing
5. Pin gate is used for [a] multi impression moulds [ b] PVC
materials [c] tall hollow products [d] none of these
6. Sleeve ejection is used for [a] solid products [b] hollow
products [c] long products [d] products with intricate shapes
7. For polishing of big holes process used is [a] reaming [b]
honing[c]grinding[d]none of these
07
OR
Q.5 (a) Write about EDM 03
(b) Discuss stripper plate ejection 04
(c) A product in HDPE weighing 5 gms is to be molded on an injection
moulding machine having shot capacity of 150 gms. Work out how
many impressions can be moulded on this machine .Assume bulk
factor of HDPE = 1.8 ; Specific gravity of HDPE = 0.96. Bulk factor
of PS= 1,4; sp.gr.of PS=1.04
07
FirstRanker.com - FirstRanker's Choice
1
Seat No.: ________ Enrolment No.___________
GUJARAT TECHNOLOGICAL UNIVERSITY
BE - SEMESTER ?VII (NEW) EXAMINATION ? WINTER 2018
Subject Code: 2172302 Date: 15/11/2018
Subject Name: Plastics Mold & Die Design
Time: 10:30 AM TO 01:30 PM Total Marks: 70
Instructions:
1. Attempt all questions.
2. Make suitable assumptions wherever necessary.
3. Figures to the right indicate full marks.
MARKS
Q.1 (a) Define : Mould ; Insert ; Guide pin 03
(b) Fill in the blanks:
1. Material of guide pin is ____________
2. Rectangular edge gate cannot be used for _____
3. Minimum diameter of a runner is ___________
4. Ring gate is used for ____________________
04
(c) For the product shown in fig[a], design a hand injection mould . Show
all calculations
07
Q.2 (a) Discuss the importance of Lathe machine in a plastics mould making
shop.
03
(b) For the product shown in fig[b], write down step by step machining 04
(c) For the mould designed above, draw both plan and elevation in graph
paper.
07
OR
(c) Discuss Pin Ejection in detail 07
Q.3 (a) For the product shown in fig[c],suggest and design suitable gate 03
(b) Calculate the efficiency of full round, half round, trapezoidal and
hexagonal runners.
04
(c) The shot capacity of an Injection moulding machine is 300 gms. It is
desired to mould the product shown in fig.[a] on this machine. Work
out the no.of impressions that can be moulded on this machine.
Bulk factor of PS = 1.4
Bulk factor of PP = 1.9
Specific gravity of PS= 1.04
Specific gravity of PP = 0.9
07
OR
Q.3 (a) Classify Extrusion Dies 03
(b) Discuss the requirements of Runner and Gate 04
(c) Discuss advantages, disadvantages and applications of Pin Gate;
Submarine Gate ; Overlap gate ; rectangular edge gate; tab gate ; ring
gate and diaphragm gate.
07
Q.4 (a) Discuss the functions of grinding machine in Mould making shops 03
(b) Discuss difference between integer and insert bolster type of moulds. 04
(c) Calculate the shot capacity of the injection moulding machine if a
product of weight 25 gms is to be moulded in ABS and a 10
impression mould is desired. Assume:
Bulk factor of PS = 1.9
Bulk factor of ABS = 1.8
Specific gravity of PS = 1.04
Specific gravity of ABS= 1.0
07
2
OR
Q.4 (a) Write about functions of Milling machine 03
(b) Differentiate between shaping and planning. 04
(c) A rectangular box molded in LDPE has dimensions of
185x125x40mm. Top open, this box has wall thickness of 2mm
throughout. If a 2 impression mould is desired , do the feed system
calculations
07
Q.5 (a) Discuss applications of ring gate 03
(b) Discuss about submarine gates. 04
(c) Tick the correct answer:
1. Material of bolster is [a] EN-8 [b] M.S. [c] OHNS
2. Material of guide pin is [a] M.S. [b] EN-24 [ c] EN-8 [d]
OHNS
3. For PVC , Gate preferred in multi impression moulds is [ a]
Ring gate [b] Rectangular edge gate [c] Round Edge gate [d]
Fan Gate
4. 4. Function of Shaping machine is [a] make holes in plate [b]
make concave shapes [c] level the plate from all sides [d]
facing
5. Pin gate is used for [a] multi impression moulds [ b] PVC
materials [c] tall hollow products [d] none of these
6. Sleeve ejection is used for [a] solid products [b] hollow
products [c] long products [d] products with intricate shapes
7. For polishing of big holes process used is [a] reaming [b]
honing[c]grinding[d]none of these
07
OR
Q.5 (a) Write about EDM 03
(b) Discuss stripper plate ejection 04
(c) A product in HDPE weighing 5 gms is to be molded on an injection
moulding machine having shot capacity of 150 gms. Work out how
many impressions can be moulded on this machine .Assume bulk
factor of HDPE = 1.8 ; Specific gravity of HDPE = 0.96. Bulk factor
of PS= 1,4; sp.gr.of PS=1.04
07
3
FirstRanker.com - FirstRanker's Choice
1
Seat No.: ________ Enrolment No.___________
GUJARAT TECHNOLOGICAL UNIVERSITY
BE - SEMESTER ?VII (NEW) EXAMINATION ? WINTER 2018
Subject Code: 2172302 Date: 15/11/2018
Subject Name: Plastics Mold & Die Design
Time: 10:30 AM TO 01:30 PM Total Marks: 70
Instructions:
1. Attempt all questions.
2. Make suitable assumptions wherever necessary.
3. Figures to the right indicate full marks.
MARKS
Q.1 (a) Define : Mould ; Insert ; Guide pin 03
(b) Fill in the blanks:
1. Material of guide pin is ____________
2. Rectangular edge gate cannot be used for _____
3. Minimum diameter of a runner is ___________
4. Ring gate is used for ____________________
04
(c) For the product shown in fig[a], design a hand injection mould . Show
all calculations
07
Q.2 (a) Discuss the importance of Lathe machine in a plastics mould making
shop.
03
(b) For the product shown in fig[b], write down step by step machining 04
(c) For the mould designed above, draw both plan and elevation in graph
paper.
07
OR
(c) Discuss Pin Ejection in detail 07
Q.3 (a) For the product shown in fig[c],suggest and design suitable gate 03
(b) Calculate the efficiency of full round, half round, trapezoidal and
hexagonal runners.
04
(c) The shot capacity of an Injection moulding machine is 300 gms. It is
desired to mould the product shown in fig.[a] on this machine. Work
out the no.of impressions that can be moulded on this machine.
Bulk factor of PS = 1.4
Bulk factor of PP = 1.9
Specific gravity of PS= 1.04
Specific gravity of PP = 0.9
07
OR
Q.3 (a) Classify Extrusion Dies 03
(b) Discuss the requirements of Runner and Gate 04
(c) Discuss advantages, disadvantages and applications of Pin Gate;
Submarine Gate ; Overlap gate ; rectangular edge gate; tab gate ; ring
gate and diaphragm gate.
07
Q.4 (a) Discuss the functions of grinding machine in Mould making shops 03
(b) Discuss difference between integer and insert bolster type of moulds. 04
(c) Calculate the shot capacity of the injection moulding machine if a
product of weight 25 gms is to be moulded in ABS and a 10
impression mould is desired. Assume:
Bulk factor of PS = 1.9
Bulk factor of ABS = 1.8
Specific gravity of PS = 1.04
Specific gravity of ABS= 1.0
07
2
OR
Q.4 (a) Write about functions of Milling machine 03
(b) Differentiate between shaping and planning. 04
(c) A rectangular box molded in LDPE has dimensions of
185x125x40mm. Top open, this box has wall thickness of 2mm
throughout. If a 2 impression mould is desired , do the feed system
calculations
07
Q.5 (a) Discuss applications of ring gate 03
(b) Discuss about submarine gates. 04
(c) Tick the correct answer:
1. Material of bolster is [a] EN-8 [b] M.S. [c] OHNS
2. Material of guide pin is [a] M.S. [b] EN-24 [ c] EN-8 [d]
OHNS
3. For PVC , Gate preferred in multi impression moulds is [ a]
Ring gate [b] Rectangular edge gate [c] Round Edge gate [d]
Fan Gate
4. 4. Function of Shaping machine is [a] make holes in plate [b]
make concave shapes [c] level the plate from all sides [d]
facing
5. Pin gate is used for [a] multi impression moulds [ b] PVC
materials [c] tall hollow products [d] none of these
6. Sleeve ejection is used for [a] solid products [b] hollow
products [c] long products [d] products with intricate shapes
7. For polishing of big holes process used is [a] reaming [b]
honing[c]grinding[d]none of these
07
OR
Q.5 (a) Write about EDM 03
(b) Discuss stripper plate ejection 04
(c) A product in HDPE weighing 5 gms is to be molded on an injection
moulding machine having shot capacity of 150 gms. Work out how
many impressions can be moulded on this machine .Assume bulk
factor of HDPE = 1.8 ; Specific gravity of HDPE = 0.96. Bulk factor
of PS= 1,4; sp.gr.of PS=1.04
07
3 4
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This post was last modified on 20 February 2020