FORM 2
THE PATENTS ACT-1970
(39 of 1970)
and
The Patent Rules, 2006
COMPLETE SPECIFICATION
(See Section 10 and Rule 13)
TITLE OF THE INVENTION
A CUP AND CONE DESIGN OF ENGINE MOUNTS FOR COMMERCIAL VEHICLES.
APPLICANT
a) Name VE Commercial Vehicles Ltd.
b) Nationality INDIAN
c) Address VE Commercial Vehicles Ltd.,
102, Industrial Area No. 1, Pithampur-454775 Dist. Dhar (Madhya Pradesh), India
PREAMBLE TO THE DESCRIPTION
The following specification particularly describes the invention and the manner in which it is to be performed.

FIELD OF INVENTION:
The present invention relates to an engine mount for a heavy commercial vehicle which reduces and absorbs vibrations generated by the operation of an engine. More particularly, the invention relates to a novel structure comprising a cup and cone arrangement of an engine mount wherein the shear load is limited in vertical direction and cross sectional area of rubber is increased to meet durability requirement. Still more particularly, the invention relates to an engine mount which dilutes vibrations of acceleration and deceleration of the vehicle as well as yaw movements during travelling on country roads without compromising on the transmissibility requirements.
BACKGROUND OF THE INVENTION
An automotive engine-body-chassis system is typically subjected to unbalanced engine forces, uneven firing forces especially at idling speeds, dynamic excitations from gear boxes and accessories and road excitation (rough rides, speed breakers etc.). Recent research and development efforts have been focused on improving engine mounting technology to achieve better vibration isolation, smooth vehicle movement and noise reduction.
Besides securing the engine to the frame or cradle, the engine mount must also isolate vibrations emanating from the engine and prevent or reduce its transmission to the chassis. Similarly, the engine mounts must also reduce/prevent the transmission of vibrations from chassis to the engine when the vehicle hits rough patches on the ride. The engine mount also compensates for drive-line axial stresses which are exerted onto the engine. An engine mount which includes a uniform elastomeric material that inherently provides different rates of elasticity in different horizontal directions is desirable for the purposes of isolating vibrations and lowering costs.
In order to reduce the transmission of vibration from a vibrating system to its support base, it is advisable to interpose a resilient mounting between the vibrating system and its base. The resilient mounting is alternatively compressed

and expanded as the system vibrates and some of the motion of the system is thus absorbed. However, if the resilient mounting has low elastic resistance, its deflection by the vibrating system requires a force which in turn causes vibratory motion of the base.
A plurality of engine mounts has been conventionally installed between automobile vehicle bodies and their power units to allow the power units to be supported in a vibration-damping fashion relative to the vehicle bodies. Such engine mounts are generally composed of an upper mounting fixture and a lower mounting fixture which are disposed apart from each other and joined by a rubber elastic body.
The spring properties of the engine mounts should be relaxed enough to achieve good vibration damping when such engine mounts are used for the vibration-damping support mechanisms for power units in relation to vehicle bodies. However, it is necessary to control significant displacement of the power unit relative to the vehicle body in instances of substantial vibration load. A stopper mechanism for cushioning relative displacement has been provided in the existing product configuration but giving a low life and high wear and tear. This is due to a bolted connection which needs to be checked at closed intervals for its proper functioning. To overcome these problems present invention has been designed , in this on the upper and lower mounting fixtures attached to either the vehicle body or power unit in conventional engine mounts.
Conventionally, an engine mount comprises of an elastomer, such as rubber, which is disposed between two retaining plates, to which it is bonded or vulcanized. However, it has been revealed that the engine mount of the above-mentioned type is particularly poor in absorbing or blocking the vibration which is transmitted from the engine unit to the vehicle body
Usually, automotive engines are mounted to the vehicle bodies through rubber insulators which are arranged and constructed to absorb or block the vibration transmission from the engine unit to the vehicle body or vice versa. However,

some of the conventional rubber insulators, viz., engine mounts fail to exhibit satisfied performance particularly against the vibration which is transmitted from the engine unit to the vehicle body.
The related art teaches a variety of features and functions related to mounting systems:
One way of mounting the engine to isolate many vibrations is using an elastomeric material interposed between an upper and lower bracket of an engine mount. Such engine mounts, as disclosed in the patent document US4151822 have elastomeric material bonded between an upper and lower bracket. The drawback of such an assembly is that it is complex and expensive to manufacture and use.
It has been proposed in the patent document US4154206 to interpose a hollow resilient mounting between an engine and its base and to connect the hollow interior of the mounting to a hydraulic system. A cam driven at engine speed, acts on a master cylinder to control the hydraulic pressure in the hollow mounting which in effect acts as a slave cylinder. By appropriate control of the hydraulic pressure, the transmission of vibrations through the mounting can be eliminated. The drawback of this system is that, as the slave cylinder is in the main load path between the engine and the base any shocks applied to the base are transmitted directly into the hydraulic system. The specification proposes certain measures to overcome these problems but these measures increase the complexity of the system to an undesirable extent.
The need was felt to develop an engine mount which is less complex and more versatile in absorbing and reducing the vibrational energy both from the engine and from the chassis.
Also disclosed in prior art, are brackets which incorporate elastomeric materials with different resiliency rates in different horizontal directions. Extra amounts of rubber or harder rubber are placed into strategic locations in the bracket mount or cavities are formed therein to provide differing amounts of resiliency in different

horizontal directions. One such elastic mount is disclosed in the patent document US2958526.
The patent document US6547207 teaches a motorcycle engine mount with an elastomeric member with a central cavity. The elastomeric member is sandwiched between metal plates. The elastomeric member is generally cylindrical, not frustoconical (having the shape of frustum of a cone). Further, the ends of the elastomeric member are not free, as one of the metal plate rests flush against one end of the elastomeric member, while the other end of the elastomeric member is fitted to an interior surface of the other metal plate. Additionally, the sides of the elastomeric member are not covered by a metal housing.
US20030107163 patent application teaches a vibration isolation bushing with an elastomeric body positioned between an inner cylinder and an outer cylinder. The inner cylinder defines the central bore. However, this document does not teach the use of a solid elastomeric body, as several axial bores are formed in the elastomeric body in addition to the central bore. These axial bores give the elastic body a frustoconical shape in cross-section. The frustoconical shapes described in the document, are orthogonal to the central bore through the mount. Further, the small ends of the frustoconical shapes are constrained by the metal housing of the mount.
The patent document US3836100 teaches placing a front mount of a helicopter engine and a rear upper mount on the horizontal line of restraint passing through the centre of gravity. The rear upper mount has significant lateral stiffness, but near zero vertical stiffness. A rear lower mount has significant vertical stiffness, but near zero lateral stiffness. This arrangement decouples the engine roll response from frame lateral input motion.
The patent document DE4009995 describes using two static mounts to define a roll axis having low stiffness in the roll direction. A lateral mount provides significant stiffness orthogonal to the roll axis, but also includes a decoupled

dampener to provide soft, dynamic response to isolate engine vibrations about the roll axis during idling.
One type of engine mount known to date is furnished with a metallic upper fitting and a metallic lower fitting of plate shape, and a pair of integrally vulcanized bonded rubber mount elements of block shape, sandwiched above and below by the upper fitting and a lower fitting. However, in the case of an engine mount of this design, there is the problem that when a constant spring constant in the vertical direction is established for the purpose of properly supporting the engine load or properly exhibiting vibration damping characteristics, the spring constant in the vehicle front-back direction or left-right direction is insufficient. To solve this problem, JP20013987, a vibration damping bushing to a mount body comprising the pair of block shaped rubber mount elements was integrally attached.
While the preceding discussion pertains to increasing spring constant in the front-back direction by means of the bushing rubber, there are also instances in which it is necessary to have a high spring constant in the left-right direction of the vehicle, for the purpose of limiting displacement in the left-right direction of a heavy motor vehicle or the like; when a bushing rubber is subjected to compressive elastic deformation in the left-right direction, the problem of diminished durability of the bushing rubber in the same direction will occur.
As disclosed in JP789356, for example, they are set up at the bottom on either side of the torque roll axis of the power unit to support the power unit from below on both sides in the lateral direction.
In all the existing prior art, various solutions are provided to improve existing engine mount design and transmissibility. While one problem has been greatly worked out, another problem of lack of durability arises due to higher deflection in shear mode because of inclined mounting.
In the present invention, to overcome the problem related to durability a central

bolt that limits the torque is replaced by novel metallic cup and cone arrangement. This metallic cup and cone arrangement provides necessary stiffness for longitudinal loads. Also in spite of placing the mounts in an inclined position, mounts are placed in horizontal position to overcome shear load in vertical direction.
The capacity of reducing.the vibration transmission to and from the engine, it was desirable to make the rubber softer. However, this solution would lead to the problem of loss of durability. A soft engine mount fails quickly due to shear and is incapable of handling braking and lateral loads. For better durability, the compression of the mounts needs to be limited by increasing the hardness of the rubber, which in turn deteriorates its capacity to reduce vibration transmission. The design of the engine mounts needs to be optimized to meet the contradictory requirements of durability and vibration isolation.
The present invention thus offers several advantages over prior art by controlling vibrations from torsional torque in the engine assembly, as well as by reducing the effect of tensile as well as compressive load that the assembly suffers when the vehicle accelerates or decelerates. This load is directly borne by the proposed engine mounts, thus reducing the impact on the frame of the engine. The internal stopper in the engine mount also acts as a hinge (centre point) to control and reduce the vibrational impact by see-saw movement.
The thickness and the height of the elastomer (such as rubber) disclosed in the prior art is good for combatting compressive load but not suitable for tensile load. The present invention proposes increased height, thickness and area of the elastomer to increase its tensile load bearing capacity and overall engine vibration damping capacity.

OBJECT OF THE INVENTION
• The primary object of the invention is to provide an engine mount wherein, by means of placing mounts in horizontal direction, shear of the elastomer in engine mounts is reduced to sufficient extent and its durability is enhanced.
• Another object of the present invention is to provide an engine mount which is applicable in both high torque (heavy load bearing) as well as high speed (passenger) vehicles.
• Still another object of the present invention is to provide an engine mount which can reduce vibrations as well as structure-born noise arising from torsional, compressive as well as tensile load on the engine.
• Yet another object of the invention is to provide in-built metallic cup and cone arrangement to control undue engine movement in braking and fore-aft movement.
STATEMENT OF THE INVENTION
Accordingly, the present invention provides an engine mount which is applicable to high torque (heavy load bearing) as well as high speed (passenger) vehicles, wherein the area and height of the elastomer is increased and the assembly is mounted horizontally to enhance the durability and reducing the shear on the engine mount. The engine mount reduces vibrations as well as structure-born noise arising from torsional, compressive as well as tensile load on the engine.
SUMMARY OF THE INVENTION
The present invention relates to vibration controlling engine mounts in the form of novel cup and cone arrangement.
First aspect of the present invention is directed to an engine mount for a heavy commercial vehicle intended to be interposed between two rigid elements (engine and its frame) to damp vibrations between these two elements essentially on a

central axis, this mount comprising: an elastomer body substantially centred on the central axis, a rigid bottom assembly fixed to the elastomer body and a periphery surrounding said elastomer body, this periphery extending substantially in a plane perpendicular to the central axis, a rigid top assembly fixed to the elastomer body and offset from the base along the central axis.
In another aspect, the top assembly has bracket, bolts, steel plate and a limiter embedded inside steel plate.
In another aspect, bolts are meant to mount with the engine and limiter provides sufficient support to prevent front to rear movement of the engine/transmission assembly movement during launch and braking conditions. Limiter forms the cup part of metallic cup and cone arrangement and thus reduces torsional vibrations by absorbing the energy.
In another aspect, the elastomer body comprises a rubber material is open from both the cross sections such that it shields cup from top assembly and cone from bottom assembly at the normal condition. Elastomer body absorbs vibrations generated during compression and expansion of engine mounts and absorbs shock of impact applied from an engine to the engine mount during a power stroke of the engine.
In another aspect, the bottom assembly has bracket, bolts, steel plate and an aligner embedded inside steel plate.
In another aspect, bolts provided at the surface of bottom assembly are meant to mount with the vehicle frame and an aligner. Aligner is a cone part of cup and cone arrangement. Cone protrudes from the bottom assembly acts as an adjustment point to keep mount components in proper alignment.
In this respect, before explaining at least one embodiment of the invention in detail, it is to be understood that the invention is not limited in its application to the details of the construction and arrangement of the components set forth in the following description or illustrated in the drawings. The invention is capable of

embodiments in addition to those described and of being practised and carried out in various ways. Also, it is to be understood that the phraseology and terminology herein as well as the abstract are for the purpose of description and should not be regarded as limiting.
BRIEF DESCRIPTION OF THE INVENTION
The innovative cup and cone arrangement of engine mounts for commercial vehicles comprises of three sub-assemblies namely the top assembly made up of top plate, bolts and limiter (cup), the bottom assembly made up of bottom plate, aligner, bolts and angular bottom plate, and the elastomer (preferably rubber) which is filled into the assembly in liquid form from the holes in the top plate (rubber moulding process). The said assembly is designed for dampening or reducing the vibrations arising from the engine and prevent them from transmitting to the chassis, as well as for preventing the transmission of vibrations from chassis to the engine. The innovative cup and cone engine mounts reduces the vibrations/structural noise from torsional, tensile and compressive loads and also reduce engine fore-aft movement during grade climbing and during braking. By increasing the height and the area of the elastomer in the mount, its durability was enhanced and shear was reduced.
BRIEF DESCRIPTION OF THE DRAWINGS
The foregoing and/or other objects, features and advantages, of the invention will become more apparent from the following description of the preferred embodiment with reference to the accompanying drawings in which reference numerals designate the elements of the invention and wherein -
Fig. 1 shows the perspective view of two engine mounts when mounted on to the frame of the engine assembly
Fig. 2 shows the perspective view of the engine mount assembly according to the preferred embodiment of the invention

Fig. 3 shows a perspective view of a part of the frame of the engine assembly with an engine mount mounted on to one side
Fig. 4 shows a side view of the engine mount assembly showing all its components
Fig. 5 shows the perspective view of the top sub-assembly of the engine mount
Fig. 6 shows the perspective view of the bottom sub-assembly of the engine mount
Fig. 7 shows the perspective view of the cushion rubber mounting which is the middle part of the engine mount assembly
Fig. 8 shows the front view of four different positions of the engine mount assembly when compressive load was applied to it, namely A) When the vehicle is accelerating B) When the vehicle is braking C) Front tilting condition of the engine mount D) Rear tilting condition of the engine mount
Fig. 9 shows the front view of four different positions of the engine mount assembly when elongating (tensile) load was applied to it, namely A) When the vehicle is accelerating B) When the vehicle is braking C) Front tilting condition of the engine mount D) Rear tilting condition of the engine mount
Fig. 10 shows the perspective view of different positions of the engine mount during the vehicle movement, namely A) Normal position B) Expansion (elongated) condition D) Compressive condition C) LH Movement (when the vehicle accelerates) E) RH Movement (when the vehicle brakes)

DETAILED DESCRIPTION OF THE DRAWINGS
The innovative cup and cone arrangement design of the engine mounts will now be described with reference to the accompanying drawings. The description below does not limit the scope and ambit of the disclosure.
Referring to Fig. 1, two engine mounts mounted on the frame of the engine assembly are illustrated. The illustrated arrangement of two engine mounts is intended to prevent the transmission of vibrations from the engine to the chassis and from the chassis on to the engine. The engine mount comprises of a cushion rubber engine mounting (1) to absorb the vibrations from the engine and the vehicle, LH rear bracket (2) and RH rear bracket (3) to angularly fasten the engine mounts on to the engine wall, bolts (4) with the help of which the engine mounts are fastened on to the engine wall, nut lock (5) to fasten the top and the bottom of the engine mount to the brackets (2) and (3), and a spring washer (6).
Referring to Fig. 2, all the parts of the innovative cup and cone arrangement of the engine mount are clearly shown. The engine mount comprises of a limiter or cup (7), an aligner or cone (8), a top plate (9), a bottom plate (10), an angular bottom bracket (11), studs (12), and elastomer (rubber) mounting (13). The limiter (7) and the aligner (8) are metallic and preferably made using mild steel (MS) of grade Fe 410. The said metallic cup and cone assembly comes in contact after a defined translation during braking and gives the necessary stiffness for longitudinal loads. This increase in stiffness does not create any negative impact during normal running as the magnitude of stiffness is low. The top plate (9) and bottom plate (10) are also preferably made of MS of grade Fe 410. The elastomer (13), preferably rubber is made of both natural rubber and styrene- butadiene rubber (NR + SBR). The capacity of reducing the vibration transmission to and from the engine, it was desirable to make the rubber softer. However, this solution would lead to the problem of loss of durability. A soft engine mount fails quickly due to shear and is incapable of handling braking and lateral loads. For better durability, the compression of the mounts needs to be limited by increasing the hardness of

the rubber, which in turn deteriorates its capacity to reduce vibration transmission. The design of the engine mounts needs to be optimized to meet the contradictory requirements of durability and vibration isolation. Therefore, the rubber mounting (13) is made thicker (height increased) and has a larger surface area compared to the existing design, to make it capable of bearing tensile load. The increased height of the rubber mounting (13) increases overall vibration damping-capacity of the engine mount. Also, the engine mounts are horizontally placed to prevent the rubber from shearing.
The illustration in Fig. 3 shows one of the engine mounts when mounted on to the frame of the engine. The metallic cup and cone assembly i.e. the limiter (7) and the aligner (8) rest over top (9) and bottom (10) plates respectively. The rubber in molten state is poured into the assembly through holes in the top plate (9) and is allowed to set. The said engine mount assembly is farther anchored to the engine wall with the help of angular top brackets (2, 3) and bottom brackets (11) which in turn are fastened on to the engine wall with the help of nut-locks (5), bolts (4), spring washers (6) and studs (12). Unlike, the existing engine mount design, the present invention proposed horizontal mounting of the engine mount, to reduce the shear and increase the durability of the engine mount.
A side-view of the engine mount assembly is illustrated in Fig. 4. The innovative cup and cone arrangement of the engine mount can be further broken up into three sub-assemblies, namely the top sub-assembly (Fig. 5), the bottom sub-assembly (Fig. 6) and the cushion rubber mount in the middle (Fig. 7).
Referring to Fig. 5, the top sub-assembly of the engine mount comprises of the limiter (7), the top plate (9) and the studs (12). The top sub-assembly forms the upper part of the engine mount assembly. The angular top bracket (2) rests over the top assembly to anchor it to the engine wall.
Similarly, referring to Fig. 6, the bottom sub-assembly of the engine mount comprises of the aligner (8), the bottom plate (10), the angular bottom bracket (11), and studs (12). The said bottom sub-assembly also comprises of ribs (14)

between the angular bottom bracket (11) and bottom plate (10), which reinforce the strength of the bottom plate (10). Cushioned between the top sub-assembly (Fig. 5) and the bottom sub-assembly (Fig. 6), is the rubber mounting (13) which absorbs or dampens the vehicle vibrations.
The different movements of the engine mount assembly have been illustrated in Fig. 8, Fig. 9 and Fig. 10. Referring to Fig. 8. the schematic representation of the engine mount is shown when compressive load is applied to it. The aligner moves towards the left direction when the vehicle accelerates (A) and towards the right when the vehicle brakes (B). The cup and cone arrangement ensures good vibration damping capacity by see-saw movements between the cup (limiter) and the cone (aligner) as shown in (C) and (D), wherein the tip or the centre point of the cone acts as a hinge over which the top plate tilts either towards the front (C) or towards the rear (D). This angular movement of the cup and cone assembly is allowed up to safe limits as decided by the manufacturer.
Similarly, the schematic representation in Fig. 9 illustrates the different movements of the engine mount when tensile load is applied to it i.e. the engine mount assembly elongates or expands.
Referring to Fig. 10, the entire engine mount assembly is shown under different vehicular conditions. The engine mount assembly is in normal or resting condition in (A), in elongated or expanded position in (B) when tensile load is applied on it and in compressed condition in (D). The said assembly also dampens vibration as the vehicle moves as demonstrated in (E) and (C) positions. The figure (C) shows the position of the engine mount assembly when the vehicle accelerates and the figure (E) shows its position when the vehicle brakes.
For manufacturing the innovative cup and cone design of engine mount assembly, the following steps need to be followed -
Step 1 - The top and bottom sub-assemblies are prepared by screwing together their child parts. The bolts are affixed using the standard tag-welding process.

Step 2 - Once the top and bottom sub-assemblies are put together, they are arranged in a mould of the required size to form a compartment for filling the elastomer.
Step 3 - The elastomer, preferably rubber is injected into the holes of the top plate (9), using the standard Injection Moulding Process, wherein a nozzle is lowered into the mold and the injecting machine fires a pre-indicated quantity of rubber into the mold. Due to its repeatability and consistency of the product, the process of injection molding is preferred over other rubber molding processes.
Step 4 - The mould is removed after the elastomer sets in place and the engine mount assembly is ready to be used.
TESTS FOR VALIDATION
Both Hard & Soft Validation of the invention were performed for the engine mounts by using CAE tools to evaluate vibration-isolation characteristics and strength of the mounts. Table 1 gives the summary of the result of the evaluation by Soft Validation. The results indicate that the transmissibility level of these engine mounts were within the target band. Factor of safety (FOS) on the brackets was also found to be in the acceptable range for road loads, braking loads, etc.
Table 1

Evaluation Criteria Target Invention design
Roll Natural Frequency 7-15 Hz 13
Vibration Transmissibility >0.4 0.3
FOS on Brackets under Road Loads >3 4.3
Soft validation was followed by hard validation on the rig and trials of field endurance. The service load data acquisition was done and excitation data was applied on the rig actuators, following which the responses on engine mounts and

the durability of the mounts was observed.
ADVANTAGES:
1. The new concept of the cup and cone assembly addresses the issues of vibration as well as deformation during braking.
2. The innovative cup and cone engine mounts are instrumental in reducing structure born noise, vibrations from engine to chassis and chassis to engine, and engine fore-aft movement during grade climbing and braking.
3. The technical advantage of the present invention includes the use of the engine mounts interchangeably in all categories of heavy commercial vehicles (HCVs) including high torque (heavy load bearing) as well as high speed (passenger) vehicles.
4. The innovative cup and cone engine mounts counter the tensile and compressive loads as well as torsional loads, thus preventing the assembly from shearing up when vehicle hits a rough patch/speed barker.
5. The proposed cup and cone arrangement has easy assembly procedures and its use does not call for any user level intervention.
6. The present invention can be used in all E683 ENG model from BS2 to BS4.
7. The present invention has been found highly reliable for driving in challenging conditions such as driving in hilly areas or driving at an angle at the edge of the road.
8. To implement the proposed arrangement, it is not required to bring change in existing cylinder block and frame design.
9. The innovative cup and cone engine mounts is adaptable with technological changes like shift from 6-gear model to 11-gear model in heavy vehicles. The assembly is amenable to be used along with complicated frames and high power engines.

10. The present invention meets CAE (Computer-Aided Engineering) criteria required to deploy commercial vehicle on road.
11. The present invention has better serviceability due to replacement of central bolt concept by novel cup and cone arrangement.
12. The present invention is easy to manufacture as it require less welding and less no of parts.

CLAIMS We claim:
1) An engine mount assembly for a heavy commercial vehicle intended to be
interposed between the engine and its frame to dampen the vibrations
between them essentially on a central axis, the said assembly comprising:
an elastomer body substantially centred on the central axis,
a rigid bottom sub-assembly fixed to the elastomer body and a periphery surrounding said elastomer body,
a rigid top sub-assembly fixed to the elastomer body and offset from the base along the central axis,
2) An engine mount assembly for a heavy commercial vehicle as claimed in Claim 1, wherein the top sub-assembly comprises of a top plate, a stud and a limiter (cup).
3) An engine mount assembly for a heavy commercial vehicle as claimed in Claim 1, wherein the bottom sub-assembly comprises of a bottom plate, aligner (cone), bolts and angular bottom plate.
4) An engine mount assembly for a heavy commercial vehicle as claimed in Claim 1, wherein the elastomer is preferably a rubber elastic body disposed between and elastically connecting the upper and lower mounting plate fixtures.
5) An engine mount assembly for a heavy commercial vehicle as claimed in Claim 1, wherein the said assembly is horizontally mounted to reduce shear and enhance the durability of the mount.
6) A method of manufacturing the innovative cup and cone arrangement of the engine mount by following the steps as mentioned below -

Step 1 - Screwing together the child parts of the top and bottom subassemblies and fixing the bolts using the standard tag-welding process
Step 2 - Putting together the top and bottom sub-assemblies and arranging them in a mould of desired size to form a compartment for filling the elastomer.
Step 3 - Injecting the elastomer, preferably rubber into the holes of the top plate, using the standard Injection Moulding, wherein a nozzle is lowered into the mould and the injecting machine fires a pre-indicated quantity of rubber into the mould.
Step 4 - Removing the mould after the elastomer sets in place to make the engine mount assembly ready for use.