Pankaj Dogra completed an industrial internship at TrellebrogVibracoustic (India) Private Limited in Mohali where he gained valuable experience in various departments. The internship objectives included understanding marketing strategies, product comparisons, and corporate culture. During the internship, Pankaj identified molding defects, undertook a project analyzing injection molding defects, and learned about safety practices and customer satisfaction. The internship provided an excellent opportunity to develop managerial skills within a corporate environment.

1. Industrial Internship
Presentation
TrellebrogVibracoustic (India) Private
Limited, Mohali.
Submitted By:
Pankaj Dogra

2. Introduction
Training is defined as the systematic development of the knowledge, skills and
attitudes required by an individual to perform a given task or job successfully.
Training aims at improving the organization’s performance through the
enhanced performance of the employees.The major purposes of training are
preparing an individual to work as per the corporate world updating skills,
managerial succession and satisfying personal growth needs.

3. Objectives
• To develop the qualities required for a manager and provide an excellent learning opportunity.
• To understand the import and export Market with due Focus on Marketing strategies.
• To compare products and range of products produced byTrelleborgVibracoustic with other NVH
producers.
• The SIP provides the students to know the actual working situation and understand the
corporate culture.
• To make understand how to undertake assignments/job along with the day-today functions of
the company.
• To provide a platform to take up On-the–job training and develop a network which will be useful
in enhancing career prospects.

4. Company Profile
TrelleborgVibracoustic is the global market
leader in the field of automotive vibration
control technology. TrellebrogVibracoustic
manufacture automobile products such as
bearings, mounts, springs, isolators, and
mass dampers reduce the noise and
vibrations caused not only by power trains,
but also by adverse road conditions. In this
industry, rubber is main raw material which is
further used for insulating the parts. This
process is done, so that unwanted vibration &
noise can b minimized in an auto mobile
vehicle.

6. ActiveVibration Control Detecting and
Neutralizing DisruptiveVibrations
Downsizing and cylinder deactivation help to
reduce fuel consumption and CO2emissions.
Nevertheless, engines with fewer cylinders
generate more vibrations, as the time intervals
between the ignitions are longer.Activating and
deactivating cylinders also produces vibrations.
Because conventional dampers work passively,
they are not always able to eliminate these types
of disturbances. ActiveVibration Control (AVC)
fromTrelleborgVibracoustic detects and tackles
these types of vibrations on an individual and
specific basis.

7. Work Area
We believe that the key to successful production
while maintaining high quality lies in the design
and concentration of the faculty.TBVC is built
with high bias infrastructure across all NVH
product manufacturing facilities.

8. Customer Base:
AtVibracoustic total customer satisfaction is our
primary concern and we value strong customer
relationship.We are committed to anticipating,
understanding and meeting our customer’s needs
and expectations.

9. Various Departments
• Security Wing
• Personnel Department
• Incoming Inspection
• Material store
• Finance Department
• Time office
• Lab (Quality)
• Quality Assurance

10. Product Range
Vibrations in the automobile are excited by the
engine and the road. Understanding and
mastering vibration control requires sound know-
how about the application areas drive train,
power train, chassis and suspension.

11. Products Manufacturing
Power train:
• Engine mount
• Hydro mount
• Gearbox mount
• Torque strut
• Transmission
Mount

12. Products Manufacturing
Chassis
• Control arm bush
• Shackle bush
• Body mount
• Leaf spring bush
• Tie rod bush

13. Products Manufacturing
Drive train
• Drive shaft damper
• Propeller shaft damper

14. Products Manufacturing
Suspension
• Air bellows
• Jounce bumper

15. Process Flow Chart

16. Safety First

17. Project Undertaken
Identification of moulding
defects
Various Defects in Injection Moulding
• Short Rubber
• Deep Injection Point
• Air Blisters
• Rubber Crack
• Loose Bond
• Dirty Mold
• Metal Defects
• Metal Damage
• Old Rubber
• Primer Failure

18. SHORT RUBBER
Possible Reasons:
• Mould is not closed.
• Usage of old rubber.
• Incorrect positioning of injection nozzle on the
mould.
• Improper clamping/injection pressure.
• Possible blockage in injection hole.
• Usage of under/over size metal.
• Unbalanced rubber volume/ Viscosity/ scorch
High.
• Low mould temperature
Effects ofThis Failure:
• Undesirable stiffness of the part.
• Inferior aesthetic appearance.
• Occurrence of noise and vibrations in the
car.
• Failure due to loss of function.
• Dissatisfaction of the customer

19. DEEP INJECTION POINT
Possible Reasons:
• High/low top mould temperature.
• Excessive dwell pressure.
• Excessive dwell time.
• Improper design of Gating system.
Effects ofThis Failure:
• Results in weak area.
• Development of cracks in the part.
• Early malfunction of the part

20. AIR BLISTER/ BUMPING
Possible Reasons:
• Improper bumping stroke/time.
• Dirty mould.
• High mould temperature.
• Vacuum not functioning.
• Metal treatment problem.
• Rubber viscosity too Low.
• Moisture in rubber compound
Effects ofThis Failure:
• Loss of function during application.
• Early breakdown of part.

21. RUBBER CRACKS
Possible Reasons:
• Excessive flash due to high rubber volume.
• Use of unfit metal parts.
• Possible cavity damage.
• Excessive mould opening speed.
• Excessive application of mould release agent.
• Operator fault during mould re-opening.
• Rubber compound too fast
Effects ofThis Failure:
• Enlargement of crack during application may
result in part failure.
• Undesirable stiffness of the part.
• Failure due to loss of function.
• Occurrence of noise and vibrations in the car.

22. BONDING FAILURE
Possible Reasons:
• MouldTemperature too high/low.
• Bonding agent too old/new.
• TooThin/Too thick bonding agent film on the
metal.
• Usage of unclean mould.
• Low injection speed/ pressure.
Effects ofThis Failure:
• Failure due to loss of function.
• Occurrence of noise and vibrations in the car.
• Discomfort to the driver.

23. DIRTY MOULD
Possible Reasons:
• Improper mould cleaning.
• Carelessness of new operator.
• Less temperature in the mould .
• Improper spray of the release agent.
• Improper mould cleaning.
Effects ofThis Failure:
• Poor aesthetic appearance.
• Dirty mould at functional area may result in
part failure.
• Results in customer dissatisfaction

24. METAL DEFECTS
Possible Reasons:
• Supplier fault.
Effects ofThis Failure:
• Poor aesthetic appearance.
• Customer dissatisfaction.
• Area of porosity might become weak and can
lead to failure of part.
• Metal defect at functional area can lead to
fitment problem (0 Km failure).

25. METAL DAMAGE
Possible Reasons:
• Use of unfit metal.
• Damage of the cavity.
• Incorrect placement of metal.
• Excessive mould opening speed.
• Mould setting problem.
• Assembly tool problem.
• Excessive mould/ injection pressure
Effects ofThis Failure:
• Poor aesthetic appearance.
• Customer dissatisfaction.
• Area of porosity might become weak and can
lead to failure of part.
• Metal damage at functional area can lead to
fitment problem (0 Km failure).

26. OLD RUBBER/ CURED RUBBER
Possible Reasons:
• Incorrect injection unit temperature.
• Flash in the cavity.
• Leakage of rubber at nozzle/plunger
Effects ofThis Failure:
• No bonding between old and good quality.
• Might come off during application.
• Might result in failure of part.
• Occurrence of noise and vibrations in the car

27. FLOWMARKS
Possible Reasons:
• Injection speed too fast/slow.
• Usage of old rubber.
• Bonding agent too fresh/thick.
• Temperature from injection aggregate too
high/low.
• High/low mould temperature.
Effects ofThis Failure:
• Heavy flow marks lead to rubber crack during
application.
• Heavy flow marks indicate improper joining of
rubber layers.
• Heavy flow marks affect stiffness and hence,
performance of the part.
• Light flow marks lead to poor aesthetic
appearance as they are on the surface only.

28. Learning’s
It improved my skill to interpret the process engineering drawings and gives
me the experience, to convert the design into product.
This activity polish me, how to work in a team to meet the production
target following all quality norms.
Excellent opportunity was given by Plant Management by giving the
practical shape to my innovative ideas.
This training gives me the learning that customer satisfaction is prime
motive in any industry; it can be achieved only by providing the product
(value for money) at right time and right place with minimum cost.
Last but not least, the importance of Safety measures in working
environment and personal life.

29. References:
• www.tbvc.Com
• Supervisor
• Shift In-Charge
• Daily Diary
• Operators
• Single & Multi-cavity development Head
• H.O.D of Plant-I and MetalTreatment Plant

30. ThankYou
o Keep Learning & Keep Growing
Pankaj Dogra
Branch: Mechanical