FORM 2
The Patents Act 1970
(39 of 1970)
&
The Patent Rules 2003
COMPLETE SPECIFICATION
(See Section 10 and rule 13)
TITLE OF THE INVENTION: MOULD ASSEMBLY WITH AUTO DEGATING AND EJECTION
MECHANISM
APPLICANT: LARSEN & TOUBRO LIMITED
L&T House, Ballard Estate, P.O. Box No. 278,
Mumbai, 400 001, Maharashtra
INDIA.
PREAMBLE OF THE DESCRIPTION:
THE FOLLOWING SPECIFICATION PARTICULARLY DESCRIBES THE
INVENTION AND THE MANNER IN WHICH IT IS TO BE PERFORMED

A) TECHNICAL FIELD
[0001] The present invention generally relates to a moulding assembly for moulding one or more components and particularly relates to an injection moulding assembly with moving side cores. The invention more particularly relates to a feeding system through moving side cores / split cavities and ejection of feed system (runner and gate) from the moving slides/split cavities.
B) BACK GROUND OF THE INVENTION
[0002] Currently there are many components that need internal and external under cuts which need to be formed with side cores or cavities for use in commercial, technical applications, engineering and automobile components. The material of these components includes metal sheets, non ferrous metals, and plastic. The manufacturing process for metal sheet component is done by using press tools. Further the non-ferrous metals such as aluminum and magnesium are processed by pressure die casting dies. There are many techniques adopted to perform plastic processing, The type of process to be used depends on numerous factors like material property, shape and size of product, quantity required, finish, strength, cost and time schedule. Some commonly used plastic processing techniques includes injection moulding, compression moulding, transfer moulding, blow moulding, rotational moulding, extrusion, thermoforming, calendaring, casting, coating and foaming.
[0003] Injection moulding is one of the major processing techniques for converting thermoplastic materials into different shapes. In this process, the plastic raw material is heated until it melts and then forcirfg the melted plastic under pressure with the injection moulding machines into a cold mould where it cools and solidifies. After this, the mould is opened and the moulded component is ejected out.

[0004] The injection mould, mainly consist of two halves, namely a fixed half and a moving half. The fixed half or the cavity side of the mould is secured with the stationary platen of the moulding machine. The moving half or the core half of the mould is secured to the moving platen of the machine. The arrangement for ejection of the moulded components is also provided in this half. The die cavity, which forms the part being moulded, is machined into both halves of the die block. In operation, both these halves are closed each other under machine tonnage and collectively they form the impression, which has the shape of the component. After this, melted plastic is injected through feed system arrangement provided on the mould into the impression where it cools and solidifies.
[0005] The die is designed so that the moulding remains in the moving half / ejector half when he mould opens taking advantage of the shrinkage property of the plastic or by other means. In the existing technique, the moulding is pushed out with ejector pins provided on the mould. There are various stages involved namely mould closing, injection of the material, cooling of the component, mould opening and ejection of the component. Further as a consequence in processing shrinkage, the molded parts tend to be retained on mold cores. Various types of ejectors are used to release parts depending on the shape of the moulded part. Usually the mold core and thus ejector mechanisms are located at the moving platen of the injection moulding machine. For ejection of the component from core, there should be no portion of the steel remains in the undercut of the component, which obstructs the removal of the component. In other words, all the undercuts in the line of draw should be released before ejection of the component. To release undercuts other than in the mould opening direction, slides are generally needed.
[0006] Hence there is a need to provide a moulding assembly for moulding one or more components containing moving side cores. Further there is also a need for

feeding and degating through the moving side cores and ejection of feed system from the moving slides.
|0007] The above mentioned shortcomings, disadvantages and problems are addressed herein and which will be understood by reading and studying the following specification.
C) OBJECT OF THE PRESENT INVENTION
[0008] The primary object of the present invention is to provide a moulding assembly containing moving side cores with feeding system thru side cores and auto degating and ejection mechanism of feed system (runner and gate) from laterally moving side cores.
[0009] Another object of the present invention is to provide a moulding assembly in which the components are fed through the runner system and the gate which is machined on the laterally moving side cores.
[0010] Yet another object of the present invention is to provide a method and an arrangement for detaching the gate which is connected to the component for the purpose of feeding thru the slot / hole machined in the moving side cores by means of mould opening movement.
[0011] Yet another object of the present invention is to provide a method and an arrangement for ejection of gate and the runner system from the slider in which the path for the same is machined into.
[0012] Yet another object of the present invention is to provide a method and an arrangement for enabling the mould to run in automated cycles.

[0013] Yet another object of the present invention is to provide a moulding assembly that requires no manual operation for degating / detaching the gates from the components even as a post moulded operation.
[0014] Yet another object of the present invention is to provide a moulding assembly with cycle time reduced and achieving the feeding of component at desired location.
D) SUMMARY OF THE INVENTION
[0015] The various embodiments of the present invention provide a mould assembly comprising a plurality of side cores, a component mounted on the plurality of side cores, a slider, a runner ejector mounted on the slider, a spring loaded in the runner ejector, a feed system attached to the component and the spring, a gate, and an ejector pin. The actuation of the plurality of side cores causes the movement of the ejector pin and the spring along with the side cores so as to feed the component through the slider and to detach the gate after moulding and facilitates ejection of feed system from the slider will happen by the operation of a mould in at least one of an open condition and a close condition,
|0016] According to one embodiment of the present invention, the cam actuates the plurality of side cores.
[0017] According to one embodiment of the present invention, the cavity / impression is filled with a material when the mould is operated in the closed condition.
[0018] According to one embodiment of the present invention, the material is injected through the runner ejector and the gate to fill the component.

[0019] According to one embodiment of the present invention, the material is at least one of a plastic.
[0020] According to one embodiment of the present invention, the gate is detached from the component as the gate and the runner ejector are moved apart of the moulded component along with the side cores during the operation of the mould in the opening condition.
[0021] According to one embodiment of the present invention, the runner ejector pin provided in the slider / side core aligns along with the main ejector pin on the mould frame during the operation of the mould in the open condition.
[0022] According to one embodiment of the present invention, the main ejector pin pushes the runner ejector pin which in turn pushes the feed system out of the plurality of side cores.
[0023] According to one embodiment of the present invention, the gate and the
runner is ejected from the slider during the operation of the mould ejection mechanism while the mould is in open condition.
[0024] These and other objects and advantages of the present invention will become readily apparent from the following detailed description taken in conjunction with the accompanying drawings.
E) BRIEF DESCRIPTION OF THE DRAWINGS
[0025] The other objects, features and advantages will occur to those skilled in the art from the following description of the preferred embodiment and the accompanying drawings in which:

[0026] FIG. 1 illustrates a cross sectional view of a mould assembly, according to one embodiment of the present invention.
|0027] FIG. 2 illustrates a perspective view of a gate and a runner system along the moulded component in a moulding, according to one embodiment of the present invention.
|0028] FIG.3 illustrates a cross sectional view of a mould assembly indicating a feeding process of a component through the side core pocket (gate machined thru side core), according to one embodiment of the present invention.
|0029] FIG.4 is a sectional view of a mould assembly in a closed condition, according to one embodiment of the present invention.
|0030] FIG.5 is a plan view of the mould assembly in a closed condition. according to one embodiment of the present invention.
[0031] FIG.6 is a sectional view of a mould assembly in an open condition, according to one embodiment of the present invention.
[0032] FIG.7 is a plan view of mould assembly in open condition, according to one embodiment of the present invention.
[0033] FIG.8 is a sectional view of a mould assembly with an ejection stroke took place, according to one embodiment of the present invention.
J0034J FIG.9 is a plan view of a mould assembly in an ejection stroke took place. according to one embodiment of the present invention.

[0035] Although the specific features of the present invention are shown in some drawings and not in others. This is done for convenience only as each feature may be combined with any or ail of the other features in accordance with the present invention.
F) DETAILED DESCRIPTION OF THE INVENTION
[0036| In the following detailed description, a reference is made to the
accompanying drawings that form a part hereof, and in which the specific embodiments that may be practiced is shown by way of illustration. These embodiments are described in sufficient detail to enable those skilled in the art to practice the embodiments and it is to be understood that the logical, mechanical and other changes may be made without departing from the scope of the embodiments. The following detailed description is therefore not to be taken in a limiting sense.
[0037] The various embodiments of the present invention provide a mould assembly comprising a plurality of side cores, a component moulded with the plurality of side cores, a slider, a runner ejector mounted on the slider, a spring loaded in the runner ejector, a feed system attached to the component through a gate, and an ejector pin. The actuation of the plurality of side cores causes the movement of the spring loaded runner ejector pin mounted on the side core along with the side cores so as to feed the component through the slider when mould is in closed condition and detaches the gate from moulded part when mould starts opening.
|0038] According to one embodiment of the present invention, the cam actuates the plurality of side cores.
[0039] According to one embodiment of the present invention, the component is filled with a material when the mould operates in the close condition.

[0040] According to one embodiment of the present invention, the material is injected through the runner ejector and the gate to fill the component.
[0041] According to one embodiment of the present invention, the material is at least one of a plastic.
[0042] According to one embodiment of the present invention, the gate detaches from the component as the gate and the runner ejector moves along with the side cores during the operation of the mould while opening.
[0043] According to one embodiment of the present invention, the runner ejector aligns along with the main ejector pin provided on the mould frame during the operation of the mould to open condition.
[0044] According to one embodiment of the present invention, the ejector pin pushes the runner ejector which in turn pushes the feed system out of the plurality of side cores.
[0045] According to one embodiment of the present invention, the gate and the
runner is ejected from the slider during the operation of the mould ejection mechanism while the mould is in open condition.
[0046] FIG. 1 illustrates a cross sectional view of a mould assembly, according to one embodiment of the present invention. With respect to FIG.I, the mould assembly includes a component 102 and outer profile of the component 102 is formed by two side cores. The two side cores are a first side core 106 and a second side core 104. The two side cores are actuated transversely to relieve the part surfaces. Further the two side cores are actuated through the cams before the ejection while the mould opens.

[0047] FIG. 2 illustrates a perspective view of a gate and a runner system along with the component moulded, according to one embodiment of the present invention. With respect to FIG.2, the component 102 is fed through a gate 202 and a runner system 204. The component 102 is filled with a material when the mould is in a closed condition. The material is injected through a runner system 204 and the gate 202 to fill the component 102. The material is at least one of a plastic. The component is fed into the runner system 204 and the gate 206 which is machined in a slider.
[0048] FIG.3 illustrates a cross sectional view of a moulding assembly indicating a feeding process of a component through the pocket (gate) machined in side core, according to one embodiment of the present invention. With respect to FIG. 3, the mounting assembly includes the component 102, the first side core 106, the second side core 104, the runner system 204, a main ejector pin 302, a runner ejector 304 and a compression spring 306. The runner ejector 304 is loaded with the spring 306 and the assembly is encapsulated in a pocket machined in side core. Further while the side cores actuates, the ejector pin 302 and the spring 306 moves together with the side cores.
[0049] The runner system 204 is machined on the fix half side insert of the mould and it rests over the top surface of the slider on the parting line. The gate 206 construction leads to machining of pocket in a particular angle. Further the plastic fills and solidifies to form an undercut and remains in the pocket itself.
[0050] When the mould opens, the cam actuates the side core 206 in a transverse direction to relieve the part surfaces. During this time, the gate 206 and the runner system 204 also move with the side core as it is located in the pocket and get separated or degated from the part. Further some forced ejection is required for the runner system 204 and the gate 206 to get it flex and ejected out from the side cores.

[0051] FIG.4 is a sectional view of a mould assembly in a closed condition. according to one embodiment of the present invention, while FIG.5 is a plan view of the mould assembly in a closed condition, according to one embodiment of the present invention. With respect to FIG.4, and FIG.5, when the mould is in the closed condition, the material is injected through the runner system 204 and the gate 206 to fill the component 102. Further after cooling and when the mould opens, the cam moves the side core. At this time, the gate 206 gets detached from the component 102 as the gate 206 and the runner system moves along with the side cores.
(0052] FIG.6 is a sectional view of a mould assembly in an open condition, according to one embodiment of the present invention, while FIG.7 is a plan view of open condition, according to one embodiment of the present invention. With respect to FIG. 6 and FIG.7. the position of a runner ejector 304 aligns with the position of the main ejector pin 302 when the mould is fully opened. The ejection stroke is actuated and the ejector pin 302 pushes the runner ejector 304 which in turn pushes the runner system 204 out of the side cores. When the ejector pin 302 returns, the runner ejector 304 also comes back to a retarded position with the help of loaded spring 306. The mould then closes and the cycle continues.
[0053] FIG.8 is a sectional view of a mould assembly in an ejection stroke took place condition, according to one embodiment of the present invention, while FIG.9 is a plan view of a mould assembly in an ejection stroke took place condition. according to one embodiment of the present invention. With respect to FIG.8. and FIG.9, the position of a runner ejector 304 aligns with the position of the main ejector pin 302. The ejection stroke is actuated and the ejector pin 302 pushes the runner ejector 304 which in turn pushes the runner system 204 out of the side cores. When the ejector pin 302 returns, the runner ejector 304 also comes back to a retarded position with the help of loaded spring 306.

G) ADVANTAGES OF THE INVENTION
[0054] The advantage of the present inventions is that the part feeding through moving external side core / cavities and auto degating while side moves and ejection of feed system from moving slides enables the mould to run in automated cycles. Further there is no manual operation for degating the components. Further the cycle time is reduced and the feeding of component at desired location is achieved.
|0055] Although the invention is described with various specific embodiments, it will be obvious for a person skilled in the art to practice the invention with modifications. However, ail such modifications are deemed to be within the scope of the claims.
[0056] It is also to be understood that the following claims are intended to cover aJJ of the generic and specific features of the present invention described herein and all the statements of the scope of the invention which as a matter of language might be said to fall there between.

CLAIMS
What is claimed is:
1. A mould assembly with feeding through side cores, auto degating and ejection mechanism of feed system from moving slides comprising: a plurality of side cores; a slider;
a runner ejector mounted on the slider; a spring loaded in the runner ejector;
a feed system machined in moving slides to feed the component attached with runner ejector and the spring;
wherein the runner ejector loaded with the spring is encapsulated in a pocket of the side core so that the runner ejector and the spring are also moved together with the side core and the runner ejector aligns with main ejector when the mould is in opened condition and the slides are moved apart so as to facilitate ejection of feed system from the slides.
2. The mould assembly according to claim 1, wherein the gate is detached from the component to be moulded as the runner and the gate is moved along with the side cores, when the side core is moved by the cam during the opening of the mould after a moulding operation.
3. The mould assembly according to claim 1. wherein the runner ejector is aligned with the ejector pin to push a feed system out of the side core during an ejection stroke when the side core is moved to a final position after the opening of the mould and the runner ejector is moved to a retarded position by the spring during a return movement of the main ejector pin to enable a user to close the mould to continue a mould cycle process.
4. The mould assembly according to claim 1, wherein the component to be moulded is filled with a material through pocket / gate machined in moving side cores when the mould operates in the close condition.

5- The mould assembly according to claim 4. wherein the material is injected through the gate located in moving side cores to fill the component to be moulded.
6. The mould assembly according to ciaim4, wherein the material is selected from a group comprising of a plastic material.
7. The mould assembly according to claiml, wherein the gate and the runner is ejected from the slider during the operation of the ejection system when the mould is in the open condition.