DESC:FORM 2
THE PATENTS ACT 1970
[39 OF 1970]
&
THE PATENTS RULES, 2003

COMPLETE SPECIFICATION
[See Section 10 and Rule 13]

TITLE: “A MOULD ASSEMBLY FOR A LOST WAX CASTING”

Name and address of the Applicant:

TITAN COMPANY LIMITED, ‘Integrity' No.193, Veerasandra, Electronics City P.O., Off Hosur Main Road, Bangalore - 560100

Nationality: Indian

The following specification describes the nature of invention and the manner in which it is to be performed..
TECHNICAL FIELD
Present disclosure generally relates to a field of manufacturing engineering. Particularly, but not exclusively, the present disclosure relates to a mould assembly used for casting process. Further, embodiments of the disclosure disclose the mould assembly employed in lost wax casting process.

BACKGROUND OF THE DISCLOSURE

Lost wax casting process is a widely used technique in jewellery industry to manufacture ornaments and other intricate jewellery articles. Lost wax casting process facilitates in manufacturing ornaments in a precise and efficient manner. Usually, lost wax casting process involves a step of forming a wax die, which is a replica of the shape of the ornament or the article to be casted. Quality of the final product depends upon the quality of the wax die used.

Generally, to produce the wax die, an ornament model or a masterpiece which is replica of the blueprint drafted by a designer may be used. The ornament model or the masterpiece is positioned in a frame, into which molten rubber/silicone sheet is positioned on either side of the masterpiece. That is, the masterpiece may be sandwiched between the rubber sheets.. The rubber/silicone sheets are then vulcanized within the frame to form the mould assembly, with masterpiece embedded within the mould assembly. Once the mould assembly is formed, the mould is cut into two halves to extract the ornament model or the masterpiece, which is binded within the mould assembly. Upon removing the ornament model or the masterpiece from the mould assembly, the two halves of the mould assembly are reassembled so as to form the mould assembly as it was before cutting. Once, the two halves of the mould assembly are reassembled, molten wax may be injected through a sprue defined in the mould assembly. The wax injected into the mould assembly solidifies and attains the shape of the impression created by the ornament model or the masterpiece to form a wax die, which is then removed from the mould assembly. Further, the wax die may be positioned in a mould made of plaster of Paris (PoP) or any other suitable material. The PoP mould is then placed in a furnace, to heat the PoP such the wax die melts and drains out creating a cavity corresponding to shape of an ornament to be manufactured. Upon, draining of the wax die, PoP mould may be placed in a casting furnace. In the casting furnace, vacuum may be created within the cavity in the PoP, and then molten gold or other precious metal is injected into the PoP mould through the sprue defined in the PoP mould. The molten gold then solidifies attaining the shape of the cavity defined in the PoP mould . Considering gold is inserted, the gold is allowed to solidify, then, the PoP mould may be broken/scrapped off and the wax die with solidified gold is extracted. Further, the solidified gold with the wax die is subjected to predetermined temperature, where the wax drains out leaving out the ornament.

However, quality of the wax die depends on the effective sealing of the mould halves upon reassembling.

In order to reassemble the two half moulds, one among the two halves is carved to include a means for fastening or mating the two halves together. Several conventional forms of mating the mould halves include usage of pins or stems which are pre-casted into the mould. However, such fasteners have several limitations such as improper fitment, fractures due to high stress and temperatures. Other conventional forms of locking the two halves of the mould is to carve out a male-female fitting, wherein one mould half would include a male fitting, while the other mould half includes a female fitting. Moreover, the male-female fittings are formed at the corners of the mould halves, defining a triangular, a square or circular profiles. Further, this kind of fittings wear out and thus limits the service life of the mould assembly, which is undesirable. In addition, this configuration of the fittings may form improper sealing and thus inhibits from forming a vacuum tight fit between the two halves of the mould assembly, when reassembled. This improper sealing may lead to several casting defects such as non-fill, flashes, parting lines, cooling defects, burrs formation and the like. These defects may lead to formation of bubbles, cavities in the wax die, which will impact overall quality of the final product i.e. the ornament. In addition, conventional fittings occupy more surface area and thus, less surface area is available for forming the wax die.

The present disclosure is directed to overcome one or more limitations stated above and any other limitations associated with the prior arts.

SUMMARY OF THE DISCLOSURE

One or more shortcomings of conventional mould assemblies are overcome and additional advantages are provided through the provision of the mould assembly as claimed in the present disclosure. Additional features and advantages are realized through the techniques of the present disclosure. Other embodiments and aspects of the disclosure are described in detail herein and are considered a part of the claimed disclosure.

In a non-limiting embodiment of the present disclosure, a mould assembly for a lost wax casting is disclosed. The mould assembly includes a first mould portion defined with a first portion of cavity on an inner major surface. Further, the first mould portion comprises a protrusion extending along a substantial portion on a perimeter of the first mould portion, in the inner major surface. Further, the mould assembly includes a second mould portion defined with a second portion of cavity on the inner major surface. The second mould portion is further defined with a groove corresponding to the protrusion of the first mould portion. The protrusion is receivable by the groove to sealingly connect the first mould portion and the second mould portion to form a vacuum seal around the cavity, defined by the first portion of the cavity and the second portion of the cavity.

In an embodiment of the present disclosure, the protrusion and the groove extend along the substantial portion of the perimeter, at a distance from edges of the first mould portion and the second mould portion.

In an embodiment of the present disclosure, the protrusion extends along three sides of the first mould portion.

In an embodiment of the present disclosure, the groove extends along three sides of the second mould portion.

In an embodiment of the present disclosure, wherein the protrusion extends integrally from the first mould portion.

In an embodiment of the present disclosure, the protrusion and the groove is defined with at least one of an U-shape profile, an inverted C-shape profile and a omega shaped profile.

In an embodiment of the present disclosure, the first mould portion and the second mould portion comprises a sprue and runner arrangement, defining a die flow path into the first portion of the cavity of the first mould portion and the second portion of the cavity second mould portion.

In an embodiment of the present disclosure, the protrusion and the groove extend curvedly on either sides of the sprue and runner arrangement.

In an embodiment of the present disclosure, the first mould portion and the second mould portion are made of polymeric material.

It is to be understood that the aspects and embodiments of the disclosure described above may be used in any combination with each other. Several of the aspects and embodiments may be combined together to form a further embodiment of the disclosure.

The foregoing summary is illustrative only and is not intended to be in any way limiting. In addition to the illustrative aspects, embodiments, and features described above, further aspects, embodiments, and features will become apparent by reference to the drawings and the following detailed description.

BRIEF DESCRIPTION OF ACCOMPANYING DRAWINGS

The novel features and characteristic of the disclosure are set forth in the appended claims. The disclosure itself, however, as well as a preferred mode of use, further objectives and advantages thereof, will best be understood by reference to the following detailed description of an illustrative embodiment when read in conjunction with the accompanying drawings. One or more embodiments are now described, by way of example only, with reference to the accompanying drawings wherein like reference numerals represent like elements and in which:

Figure. 1 illustrates a perspective view of a first mould portion of a mould assembly, in accordance with an embodiment of the present disclosure;

Figure. 2 illustrates a perspective view of a second mould portion of the mould assembly, in accordance with an embodiment of the present disclosure;

Figure. 3 illustrates sectional view of the mould assembly, with the first mould portion and the second mould portion in reassembled condition, in accordance with an embodiment of the present disclosure.

The figures depict embodiments of the disclosure for purposes of illustration only. One skilled in the art will readily recognize from the following description that alternative embodiments of the structures and methods illustrated herein may be employed without departing from the principles of the disclosure described herein.

DETAILED DESCRIPTION

While the embodiments in the disclosure are subject to various modifications and alternative forms, specific embodiment thereof has been shown by way of example in the figures and will be described below. It should be understood, however, that it is not intended to limit the disclosure to the particular forms disclosed, but on the contrary, the disclosure is to cover all modifications, equivalents, and alternative falling within the scope of the disclosure.

It is to be noted that a person skilled in the art would be motivated from the present disclosure and modify various constructions of the mould assembly. However, such modifications should be construed within the scope of the disclosure. Accordingly, the drawings show only those specific details that are pertinent to understand the embodiments of the present disclosure, so as not to obscure the disclosure with details that will be readily apparent to those of ordinary skill in the art having benefit of the description herein.

The terms “comprises”, “comprising”, or any other variations thereof used in the disclosure, are intended to cover a non-exclusive inclusion, such that a device, system, assembly that comprises a list of components does not include only those components but may include other components not expressly listed or inherent to such system, or assembly, or device. In other words, one or more elements in a system or device proceeded by “comprises… a” does not, without more constraints, preclude the existence of other elements or additional elements in the system or device.

Embodiments of the present disclosure discloses a mould assembly for a lost wax casting. Usually, quality of the wax die depends on the effective sealing of the mould portions upon reassembling, to form a mould assembly. To reassemble the two mould portions, one among the two mould portions is carved to include a means for fastening or mating the two mould portions, together. Several conventional forms of mating the mould portions include usage of pins or stems which are pre-casted into the mould. However, such fasteners have several limitations such as improper fitment, fractures due to high stress and temperatures etc. Other conventional forms of locking the two mould portions of the mould assembly is to carve out a male-female fitting, wherein one mould half would include a male fitting, while the other mould half includes a female fitting. Moreover, the male-female fittings are formed at the corners of the mould halves, defining a triangular, a square or circular profiles. Such carvings required highly skilled workmanship as each male and female fitting had to match with one another for effective joining. Further, this kind of fittings wear out and thus limits the service life of the mould assembly, which is undesirable. In addition, this configuration of the fittings may form improper sealing and thus inhibits from forming a vacuum tight seal between the two portions of the mould assembly, when reassembled. This improper sealing may lead to several casting defects such as non-fill, flashes, parting lines, cooling defects, burrs formation and the like. These defects may lead to formation of bubbles, cavities in the wax die, which will impact overall quality of the final product i.e. the ornament.

Accordingly, the present disclosure discloses a mould assembly for lost wax casting. The mould assembly may include a first mould portion and a second mould portion, which may be removably, sealingly reassembled to form a mould assembly for carrying out lost wax casting. The first mould portion may be defined with a first portion of cavity in an inner major surface. Further, the first mould portion may include a protrusion, which extends along a substantial portion of a perimeter of the first mould portion in the inner major surface. The second mould portion may be defined with a second portion of cavity in the inner major surface. Further, the second mould portion may be defined with a groove, which corresponds to the protrusion of the first mould portion.

In an embodiment, the protrusion of the first mould portion may be receivable by the groove defined in the second mould portion to sealingly connect the first mould portion and the second mould portion. The configuration of the protrusion in the first mould portion and the groove defined in the second mould portion, aids in forming a vacuum tight seal around the cavity defined by the first and second portion of the cavity in the first mould portion and the second mould portion respectively, to carry out lost wax casting, in an effective and efficient manner.

The following paragraphs describe the present disclosure with reference to Figures. 1 to 3. In the Figures, the same element or elements which have similar functions are indicated by the same reference signs.
Figure. 1 illustrates a perspective view of a first mould portion (101) and a second mould portion (102) of a mould assembly (100) for a lost wax casting. The first mould portion (101) and the second mould portion (102) may be obtained by cutting the mould assembly (100) in to two portions, typically into two halves, using suitable cutting tools. In an illustrated embodiment, the mould assembly (100) (thus, the first mould portion (101) and the second mould portion (102)) includes a substantially rectangular configuration. However, the same cannot be construed as a limitation since the mould assembly (100) may include any geometrical shape such as but not limiting to square, circular and the like depending on the size and requirement of the article to be casted. In an embodiment, the first mould portion (101) and the second mould portion (102) may be sealingly reassembled to form the mould assembly (100), to carry out lost wax casting.
As seen in Figure. 1, the first mould portion (101) may be defined with a first portion of cavity (103a) in an inner major surface. In an illustrated embodiment, the first portion of the cavity (103a) may be defined at a substantially central location on the inner major surface of the first mould portion (101). However, the same cannot be construed as a limitation, since the first portion of the cavity (103a) may be defined at any location in the inner major surface of the first mould portion (101). Further, the first mould portion (101) comprises a protrusion (105), which may extend along a substantial portion of a perimeter of the first mould portion (101), in the inner major surface. In an embodiment, the protrusion (105) may extend linearly along three sides of the first mould portion (101) and may extend integrally from the first mould portion (101). That is, the protrusion (105) may form a unitary structure with the first mould portion (101). As apparent from Figure. 1, the protrusion (105) may extend along substantial portion of the perimeter, at a distance from edges of the first mould portion (101). In an embodiment, the protrusion (105) may be defined with at least one of a U-shaped profile, an inverted C-shape profile and omega profile. As an example, if the protrusion (105) includes a U-shaped profile, the groove (104) includes an inverted U-shaped profile for sealingly connecting the first mould portion (101) and the second mould portion (102)
Further referring to Figure. 1, the first mould portion (101) may include a sprue (106) and a runner (107) arrangements. The sprue (106) and the runner (107) arrangements may be defined at one side [i.e. the side other than the three sides in which the protrusion (105) extends] of the first mould portion (101). The sprue (106) and the runner (107) arrangements may include a semi-circular cavity and a semi-cylindrical cavity, extending to a certain length from the semi-cylindrical cavity. In an embodiment, the sprue (106) and the runner (107) arrangements may define a die flow path into the first portion of the cavity (103a) defined in the inner major surface of the first mould portion (101), during lost wax casting. As apparent from Figure. 1, the protrusion (105) may further extend in a curved profile on either sides of the sprue (106) and runner (107) arrangements.
Now turning to Figure. 2, the second mould portion (102) may be defined with a second portion of cavity (103b) in the inner major surface. Further, the second mould portion (102) may be defined with a groove (104), which may correspond to the shape and configuration of the protrusion (105) of the first mould portion (101). That is, the groove (104) may extend along a substantial portion of the perimeter of the second mould portion (102). In an embodiment, the groove (104) may extend linearly along three sides of the second mould portion (102), and at a distance from the edges of the second mould portion (102). Further referring to Figure. 2, the second mould portion (102) may include the sprue (106) and the runner (107) arrangements. The sprue (106) and the runner (107) arrangements may be defined at one side (i.e. the side other than the three sides in which the protrusion (105) extends) of the first mould portion (101). The sprue (106) and runner (107) arrangements may include a semi-circular cavity and a semi-cylindrical cavity, extending to a certain length from the semi-cylindrical cavity. In an embodiment, the sprue (106) and the runner (107) arrangements may define a die flow path into the second portion of the cavity (103b) defined in the inner major surface of the first mould portion (101), during lost wax casting. As apparent from Figure. 2, the protrusion (105) may further extend in a curved profile on either sides of the sprue (106) and the runner (107) arrangements.
In an embodiment, the protrusion (105) in the first mould portion (101) and the groove (104) defined in the second mould portion (102) may be configured as a male fitting and a female fitting, respectively to sealingly connect the first mould portion (101) and the second mould portion (102).
In an embodiment, in order to carry out lost wax casting the first mould portion (101) and the second mould portion (102) may be reassembled to form a mould assembly (100) [as seen in Figure. 3]. In an embodiment, the protrusion (105) of the first mould portion (101) may be received by the groove (104) defined in the second mould portion (102), such that the first mould portion (101) and the second mould portion (102) may be sealingly connected to form a vacuum seal joint around the cavity defined by the first portion of the cavity (103a) and the second portion of the cavity (103b) of the first mould portion (101) and the second mould portion (102), respectively [as seen in Figure. 3]. As the first mould portion (101) and the second mould portion (102) are placed in alignment, gentle force may be applied in order to fit the protrusion (105) into the groove (104). This ensures that both the first mould portion (101) and second mould portion (102) are fitted sealingly. Further, the reassembling of the first mould portion (101) and the second mould portion (102), the sprue (106) and runner (107) arrangement in each of the first mould portion (101) and the second mould portion (102) corresponds to each other and, thus may define a die flow path, which extends into the cavity defined by the first portion of the cavity (103a) and the second portion of the cavity (103b).
In an embodiment, upon reassembling the first mould portion (101) and the second mould portion (102), suitable die such as wax may be introduced into the cavity defined by the first portion of cavity (103a) and the second portion of cavity (103b), through the sprue (106) and runner (107) arrangements, to form a wax mould resembling shape of the ornament to be casted.
In an embodiment, the protrusion (105) and the groove (104) may be defined in a U-shaped or Inverted C-shaped or omega shaped configuration and this may not be construed as a limitation, as the profile of the fittings may include triangular, square, rectangular or any other geometrical shape that serves the purpose.
In an embodiment, the profile and configuration of the protrusion (105) in the first mould portion (101) and the groove (104) defined in the second mould portion (102) facilitates in perfect mating of the mould portions and forming the vacuum tight seal around the cavity defined as result of reassembling the first mould portion (101) and the second mould portion (102).
In an embodiment, the configuration of the protrusion (105) and the groove (104) may occupy minimum surface area on the mould portions and thus, facilitate in utilizing more surface area for wax die formation.
In an embodiment, the profile and configuration of the protrusion (105) and the groove (104) enables the fittings to be wear resistance and thus, improves shelf life and durability of the mould assembly (100).
In an embodiment, the first and second mould portions may be made of polymeric material such as but not limiting to rubber.
In an embodiment, the a special polymeric material may be introduced onto the first portion of cavity (103a) and the second portion of cavity (103b), to obtain high finished wax die.
In an embodiment, the protrusion (105) and the groove (104) defined in the first mould portion (101) and the second mould portion (102) may be defined in a simpler way, unlike conventional methods of creating fittings, which is tedious and yet susceptible to wear and tear.

Equivalents:

With respect to the use of substantially any plural and/or singular terms herein, those having skill in the art can translate from the plural to the singular and/or from the singular to the plural as is appropriate to the context and/or application. The various singular/plural permutations may be expressly set forth herein for sake of clarity.
It will be understood by those within the art that, in general, terms used herein, and especially in the appended claims (e.g., bodies of the appended claims) are generally intended as "open" terms (e.g., the term "including" should be interpreted as "including but not limited to," the term "having" should be interpreted as "having at least," the term "includes" should be interpreted as "includes but is not limited to," etc.). It will be further understood by those within the art that if a specific number of an introduced claim recitation is intended, such an intent will be explicitly recited in the claim, and in the absence of such recitation no such intent is present. For example, as an aid to understanding, the following appended claims may contain usage of the introductory phrases "at least one" and "one or more" to introduce claim recitations. However, the use of such phrases should not be construed to imply that the introduction of a claim recitation by the indefinite articles "a" or "an" limits any particular claim containing such introduced claim recitation to inventions containing only one such recitation, even when the same claim includes the introductory phrases "one or more" or "at least one" and indefinite articles such as "a" or "an" (e.g., "a" and/or "an" should typically be interpreted to mean "at least one" or "one or more"); the same holds true for the use of definite articles used to introduce claim recitations. In addition, even if a specific number of an introduced claim recitation is explicitly recited, those skilled in the art will recognize that such recitation should typically be interpreted to mean at least the recited number (e.g., the bare recitation of "two recitations," without other modifiers, typically means at least two recitations, or two or more recitations). Furthermore, in those instances where a convention analogous to "at least one of A, B, and C, etc." is used, in general such a construction is intended in the sense one having skill in the art would understand the convention (e.g., "a system having at least one of A, B, and C" would include but not be limited to systems that have A alone, B alone, C alone, A and B together, A and C together, B and C together, and/or A, B, and C together, etc.). In those instances, where a convention analogous to "at least one of A, B, or C, etc." is used, in general such a construction is intended in the sense one having skill in the art would understand the convention (e.g., "a system having at least one of A, B, or C" would include but not be limited to systems that have A alone, B alone, C alone, A and B together, A and C together, B and C together, and/or A, B, and C together, etc.). It will be further understood by those within the art that virtually any disjunctive word and/or phrase presenting two or more alternative terms, whether in the description, claims, or drawings, should be understood to contemplate the possibilities of including one of the terms, either of the terms, or both terms. For example, the phrase "A or B" will be understood to include the possibilities of "A" or "B" or "A and B."

While various aspects and embodiments have been disclosed herein, other aspects and embodiments will be apparent to those skilled in the art. The various aspects and embodiments disclosed herein are for purposes of illustration and are not intended to be limiting, with the true scope and spirit being indicated by the following claims.

Referral Numerals:
Referral numeral Description
100 Mould assembly
101 First mould portion
102 Second mould portion
103a First portion of a cavity
103b Second portion of a cavity
104 Groove
105 Protrusion
106 Sprue
107 Runner

We Claim:

1. A mould assembly (100) for a lost wax casting, comprising:
a first mould portion (101) defined with a first portion of a cavity (103a) in an inner major surface, wherein the first mould portion (101) comprises a protrusion (105) extending along a substantial portion of a perimeter of the inner major surface of the first mould portion (101); and
a second mould portion (102) defined with a second portion of a cavity (103b) in the inner major surface, wherein the second mould portion (102) is defined with a groove (104) in the inner major surface of the second mould portion (102) corresponding to the protrusion (105) of the first mould portion (101);
wherein, the protrusion (105) is receivable by the groove (104) to sealingly connect the first mould portion (101) and the second mould portion (102) to form a vacuum seal around the cavity defined by the first portion of the cavity (103a) and the second portion of the cavity (103b).

2. The mould assembly (100) as claimed in claim 1, wherein the protrusion (105) and the groove (104) extend along the substantial portion of the perimeter, at a distance from edges of the first mould portion (101) and the second mould portion (102), respectively.

3. The mould assembly (100) as claimed in claim 1, wherein the protrusion (105) extends along at least three sides of the first mould portion (101).

4. The mould assembly (100) as claimed in claim 1, wherein the groove (104) extends along at least three sides of the second mould portion (102).

5. The mould assembly (100) as claimed in claim 1, wherein the protrusion (105) extends integrally from the first mould portion (101).

6. The mould assembly (100) as claimed in claim 1, wherein the protrusion (105) and the groove (104) is defined with at least one of U-shape profile, an inverted C-shaped profile and omega shaped profile.

7. The mould assembly (100) as claimed in claim 1, wherein the first mould portion (101) and the second mould portion (102) comprises a sprue (106) and runner (107) arrangement, defining a die flow path into the first portion of the cavity (103a) and the second portion of the cavity (103b) defined in the first mould portion (101) and the second mould portion (102).

8. The mould assembly (100) as claimed in claim 7, wherein the protrusion (105) and the groove (104) extend curvedly on either side of the sprue (106) and runner (107) arrangement.

9. The mould assembly (100) as claimed in claim 1, wherein the first mould portion (101) and the second mould portion (102) are made of polymeric material.

Dated 04th day of September 2020

GOPINATH A S
IN/PA 1852
OF K&S PARTNERS
AGENT FOR THE APPLICANT

TITLE: “A MOULD ASSEMBLY FOR A LOST WAX CASTING”

ABSTRACT

Present disclosure discloses a mould assembly for a lost wax casting. The mould assembly includes a first mould portion defined with a first portion of cavity. The first mould portion includes a protrusion, extending along a substantial perimeter of the first mould portion. Further, the mould assembly includes a second mould portion, defined with a second portion of cavity. The second portion is defined with a groove, corresponding to the protrusion of the first mould portion. The protrusion is configured to be receivable by the groove to sealingly connect the first mould portion and the second mould portion to form vacuum tight seal around the cavity defined by the first portion of the cavity and the second portion of the cavity. The configuration of the protrusion and the groove aids in increasing in life of the mould assembly, as the same are less susceptible to wear and tear and, also aids in forming vacuum tight seal.

Figure. 1 and 12 are representative figure.

,CLAIMS:We Claim:

1. A mould assembly (100) for a lost wax casting, comprising:
a first mould portion (101) defined with a first portion of a cavity (103a) in an inner major surface, wherein the first mould portion (101) comprises a protrusion (105) extending along a substantial portion of a perimeter of the inner major surface of the first mould portion (101); and
a second mould portion (102) defined with a second portion of a cavity (103b) in the inner major surface, wherein the second mould portion (102) is defined with a groove (104) in the inner major surface of the second mould portion (102) corresponding to the protrusion (105) of the first mould portion (101);
wherein, the protrusion (105) is receivable by the groove (104) to sealingly connect the first mould portion (101) and the second mould portion (102) to form a vacuum seal around the cavity defined by the first portion of the cavity (103a) and the second portion of the cavity (103b).

2. The mould assembly (100) as claimed in claim 1, wherein the protrusion (105) and the groove (104) extend along the substantial portion of the perimeter, at a distance from edges of the first mould portion (101) and the second mould portion (102), respectively.

3. The mould assembly (100) as claimed in claim 1, wherein the protrusion (105) extends along at least three sides of the first mould portion (101).

4. The mould assembly (100) as claimed in claim 1, wherein the groove (104) extends along at least three sides of the second mould portion (102).

5. The mould assembly (100) as claimed in claim 1, wherein the protrusion (105) extends integrally from the first mould portion (101).

6. The mould assembly (100) as claimed in claim 1, wherein the protrusion (105) and the groove (104) is defined with at least one of U-shape profile, an inverted C-shaped profile and omega shaped profile.

7. The mould assembly (100) as claimed in claim 1, wherein the first mould portion (101) and the second mould portion (102) comprises a sprue (106) and runner (107) arrangement, defining a die flow path into the first portion of the cavity (103a) and the second portion of the cavity (103b) defined in the first mould portion (101) and the second mould portion (102).

8. The mould assembly (100) as claimed in claim 7, wherein the protrusion (105) and the groove (104) extend curvedly on either side of the sprue (106) and runner (107) arrangement.

9. The mould assembly (100) as claimed in claim 1, wherein the first mould portion (101) and the second mould portion (102) are made of polymeric material.

Dated 04th day of September 2020

GOPINATH A S
IN/PA 1852
OF K&S PARTNERS
AGENT FOR THE APPLICANT