DESC:TECHNICAL FIELD OF THE INVENTION
This invention relates generally to a system and a method of moulding. More particularly, the present invention relates to a system and a method for removing undercuts in moulds. It can be used for both injection mould and compression mould.

BACKGROUND AND THE PRIOR ART
Conventionally, undercuts can be formed only by a side core movement in injection mould. This side core movement in turn requires an angle pin or dog leg cam, wear plate construction etc. All this construction will make the tool very complicated (from design and manufacturing point of view).
In injection moulds, side cores are a common phenomenon for removal of undercuts from the component. This side core movement is provided by the opening movement of the mould. The vertical movement of the mould is converted into horizontal movement of mould with the help of either angle pin or dog leg cam. This angle pin construction/ dog leg cam construction makes the tool complicated by design and for manufacturing also. This increases the cost of the injection mould.
This invention relates to the side core in injection mould which swivels after every shot for easy removal of component. In the present invention, there is provided a swiveling type of side core used in an injection mould for removal of undercut from the component. The final plastic component has an undercut to be formed.
In the present invention, the moving side core and all parts related to this has been avoided. This component is formed using a fixed side core with hinging movement. The fixed side core in held in the die with one pin with sliding fit so that the side core can hinge about that pin. With the help of hinging/swiveling action of the pin, the undercut is removed and the component is pushed outside the mould.

OBJECTS OF THE INVENTION
A basic object of the present invention is to overcome the disadvantages/drawbacks of the known art.
Another object of the present invention is to provide a system for removing undercuts in mould.
Another object of the present invention is to provide a method of removing undercuts in mould.
Another object of the present invention is to provide a method for removing undercut that can be used for both injection mould and compression mould.
Another object of the present invention is to provide a system for removing undercut that can be used for both injection mould and compression mould.
These and other advantages of the present invention will become readily apparent from the following detailed description read in conjunction with the accompanying drawings.

SUMMARY OF THE INVENTION
The following presents a simplified summary of the invention in order to provide a basic understanding of some aspects of the invention. This summary is not an extensive overview of the present invention. It is not intended to identify the key/critical elements of the invention or to delineate the scope of the invention. Its sole purpose is to present some concept of the invention in a simplified form as a prelude to a more detailed description of the invention presented later.
According to one embodiment of the present invention, there is provided a swiveling/ hinging type of fixed side core. It is a kind of fixed side core but with swiveling movement so that the component can be relieved to eject from the mould.
In an aspect of the present invention, there is provided a system for removing undercuts from a component in mould(s), said system comprising;
a punch;
a die for making said component(s); and
an ejector plate comprising an ejector pin for ejecting said component(s) from said die;
wherein a swivel side core assembly connected to said die using a connecting means for removing undercuts from said component(s), thereby ejecting said component(s) from said mould(s).
In another aspect of the present invention, there is provided a method for removing undercuts from a component in moulds, said method comprising the steps of:
forming a component(s) with undercuts in a die of said mould;
removing the undercuts from said component(s) using a swivel side core assembly, wherein a side core swivels about a hinge pin and rotates during successive movement of an ejector pin for relieving the undercuts; and
ejecting said component after relieving the undercuts from said component using an ejector plate.
Other aspects, advantages, and salient features of the invention will become apparent to those skilled in the art from the following detailed description, which, taken in conjunction with the annexed drawings, discloses exemplary embodiments of the invention.

BRIEF DESCRIPTION OF THE ACCOMPANYING DRAWINGS
The following drawings are illustrative of particular examples for enabling methods of the present invention, are descriptive of some of the methods, and are not intended to limit the scope of the invention. The drawings are not to scale (unless so stated) and are intended for use in conjunction with the explanations in the following detailed description.
Figure 1 illustrates the undercut in the component.
Figure 2 illustrates the side core that swings during the ejection thereby relieving the undercut.
Figure 3 illustrates the swivel side core, punch, pin, component and die.
Figure 4 illustrates the different parts of the present disclosed system.
Figure 5(a) & (b) illustrates the mould in open condition
Figure 6 (PRIOR ART) illustrates the Existing method of removing undercut.
Persons skilled in the art will appreciate that elements in the figures are illustrated for simplicity and clarity and may have not been drawn to scale. For example, the dimensions of some of the elements in the figure may be exaggerated relative to other elements to help to improve understanding of various exemplary embodiments of the present disclosure.
Throughout the drawings, it should be noted that like reference numbers are used to depict the same or similar elements, features, and structures.

DETAILED DESCRIPTION OF THE INVENTION
The following description with reference to the accompanying drawings is provided to assist in a comprehensive understanding of exemplary embodiments of the invention as defined by the claims and their equivalents. It includes various specific details to assist in that understanding but these are to be regarded as merely exemplary. Accordingly, those of ordinary skill in the art will recognize that various changes and modifications of the embodiments described herein can be made without departing from the scope and spirit of the invention. In addition, descriptions of well-known functions and constructions are omitted for clarity and conciseness.
The terms and words used in the following description and claims are not limited to the bibliographical meanings, but, are merely used by the inventor to enable a clear and consistent understanding of the invention. Accordingly, it should be apparent to those skilled in the art that the following description of exemplary embodiments of the present invention are provided for illustration purpose only and not for the purpose of limiting the invention as defined by the appended claims and their equivalents.
It is to be understood that the singular forms “a,” “an,” and “the” include plural referents unless the context clearly dictates otherwise.
By the term “substantially” it is meant that the recited characteristic, parameter, or value need not be achieved exactly, but that deviations or variations, including for example, tolerances, measurement error, measurement accuracy limitations and other factors known to those of skill in the art, may occur in amounts that do not preclude the effect the characteristic was intended to provide.
Accordingly, present invention provides a system and method for removing the undercuts from a component in moulds
Any plastic component with undercuts requires a moving side core in the mould to release the undercut. In this invention we have avoided this movement of side core and still released the undercut.
In this invention, the movement of the side core is completely avoided. A fixed side core has been used instead of a moving side core. But the undercut in the component cannot be released with the fixed side core. The present invention provides for a swiveling/ hinging type of fixed side core. It is a kind of fixed side core but with swiveling movement so that the component can be relieved to eject from the mould as shown in figure 4, this invention consists of a swivel side core(3), a hinge pin(5) and a hinge block(4). These three together form a swivel core assembly which is fixed to the die (2) with the help of screws (6). This swivel side core assembly lies in the horizontal plane. As the mold opens, ejector pin (7) is pushed up by the ejector plate at the bottom of the mould. This in turn will push the component (8) (as shown in fig.5 (a) & (b)). Since the component (8) and the swivel side core (3) forms an undercut, the side core (3) is also pushed by the ejector pin (7). As shown in fig.4, swivel side core (3) is held in the hinge block (4) with a hinge pin (5). So the side core (3) can only swivel around the hinge pin (5). Hence as the ejector pin (7) pushes the component (8), the side core (3) swivels about the hinge pin (5) and gets rotated as shown in fig 5(a) & 5(b). During subsequent movement of ejector pin (7), the side core (3) rotates further and relieves the undercut as shown in fig 5(b). This rotation is also restricted by the sharp edge of the swivel side core (3) thereby allowing the side core (3) to swivel to about 18 degrees wrt horizontal. This rotation is enough to relieve the undercut so that the component (8) can be ejected. During closure of the mould the upper half of the mould ie the punch (1) will push the swivel side core (3) and bring it back to its original position.

During formation of the component, this core acts as a fixed core so that the plastic component is formed with required undercut. During the opening of mould, the side core (3) swivels and moves with component (8) thereby relieving the undercut. Once the undercut is relieved, the component is ejected without any obstruction with the help of ejector pins (7).
Thus without horizontal movement of the side core (3), the undercut in the component (8) is relieved. This has made our design simple, cost of manufacturing is less. Also the size of tool is reduced because of using a fixed side core.
Figure 6 shows one of the existing arrangements for removing undercut in a component. It consists of a moving core (01), an angle pin (03), a wear plate (02), and screws (04). The movement for the moving core (01) is provided by the angle pin (03). As the mould closes, the angle pin (03) causes the side core to move inside and then moulding takes place. Similarly during opening stroke, the angle pin (03) first moves the side core away so that the undercut in the component is relieved. Then the ejector plate is activated to eject the component. Because of these movements of the side cores, the tool becomes large and bulkier. Also assembly and working of the tools become complicated. So in our invention, instead of using this moving core arrangement we have relieved the undercut by using a swivel side core which doesn’t require any horizontal movement of the core thus avoiding the angle pin, wear plate and movement of the side core.
Although the embodiments herein are described with various specific embodiments, it will be obvious for a person skilled in the art to practice the embodiments herein with modifications. However, all such modifications are deemed to be within the scope of the claims.
It is also to be understood that the following claims are intended to cover all of the generic and specific features of the embodiments described herein and all the statements of the scope of the embodiments which as a matter of language might be said to fall there between. ,CLAIMS:1. A system for removing undercuts from a component in mould(s), said system comprising;
a punch;
a die for making said component(s); and
an ejector plate comprising an ejector pin for ejecting said component(s) from said die;
wherein a swivel side core assembly connected to said die using a connecting means for removing undercuts from said component(s), thereby ejecting said component(s) from said mould(s).
2. The system as claimed in claim 1, wherein said mould(s) is an injection mould or a compression mould.
3. The system as claimed in claim 1, wherein said swivel side core assembly comprises a swivel side core, a hinge pin and a hinge block.
4. The system as claimed in claim 1, wherein said ejector pin is pushed up by said ejector plate when said mould is opened, thereby pushing said component for ejection.
5. The system as claimed in claim 1, wherein said component and said swivel side core form an undercut, therefore said ejector pin further pushing said swivel side core.
6. The system as claimed in claim 1 and claim 3, wherein said side core swivels about said hinge pin and rotates during successive movement of said ejector pin for relieving the undercuts.
7. The system as claimed in claim 6, wherein rotation of said side core is restricted by the edge of said swivel side core thereby allowing said side core to swivel about 18 degrees with respect to horizontal, therefore ejecting said component after relieving the undercuts from said component.
8. The system as claimed in claim 1, wherein said punch pushes said side core towards said die during closing of said mould.
9. The system as claimed in claim 1, wherein said component is selected from the group comprising plastic component, metallic component and the like.
10. The system as claimed in claim 1, wherein said connecting means is selected from the group comprising a screw, pin and the like.
11. A method for removing undercuts from a component in mould(s), said method comprising steps of:
forming a component (s) with undercuts in a die of said mould;
removing the undercuts from said component(s) using a swivel side core assembly connected to said die using a connecting means, wherein a side core swivels about a hinge pin and rotates during successive movement of an ejector pin for relieving the undercuts; and
ejecting said component after relieving the undercuts from said component using an ejector plate.
12. The method as claimed in claim 11, wherein said mould(s) is an injection mould or a compression mould.
13. The method as claimed in claim 11, wherein said swivel side core assembly comprises said swivel side core, said hinge pin and a hinge block.
14. The method as claimed in claim 11, wherein said ejector pin is pushed up by said ejector plate, when said mould is opened, thereby pushing said component for ejection.
15. The method as claimed in claim 14, wherein said component and said swivel side core form an undercut thereby further pushing said swivel side core by the ejector pin.
16. The method as claimed in claim 11, wherein rotation of said side core is restricted by the edge of said swivel side core thereby allowing said side core to swivel about 18 degrees with respect to horizontal, therefore ejecting said component after relieving the undercuts from said component.
17. The method as claimed in claim 11, wherein a punch pushes said side core towards said die during closing of said mould.
18. The method as claimed in claim 11, wherein said component is selected from the group comprising plastic component, metallic component and the like.
19. The method as claimed in claim 11, wherein said connecting means are selected from the group comprising a screw, pin and the like.