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Aim/Objectives: Create the Core and cavity blocks for the switch bezel designed in the earlier challenge. Steps Followed: Tooling Axis creation Checking Draft analysis for created tooling Axis Creating parting Surface Creating Core Side Creating cavity side. 1). Tooling Axis: Tooling axis is the axis in which core…
Mukesh Kanna S
updated on 24 Sep 2022
Aim/Objectives: Create the Core and cavity blocks for the switch bezel designed in the earlier challenge.
Steps Followed:
1). Tooling Axis:
Tooling axis is the axis in which core cavity open during completion of injection molding. To create the tooling axis, we need the proper orientation or view that gives the correct features and draft available in the component.
Component view from the Z direction gives the proper view for the tool to see the features present in the geometry. To create the tooling axis from the Z direction we need the tooling axis from the X direction since it gives the draft available at the slanted part.
The tooling axis created from the X Direction By the following Steps:
Using the intersect in ZY plane to get the boundary lines.
Then the lines are created along the slant surfaces.
Then these two lines are bisected to get the tooling axis for the X direction.
Below line represent the tooling axis for surface.
2). Draft Analysis:
Draft analysis enables you to detect the part we drafted will be easily removed. This type of analysis performed on the base of color ranges identifying the zones on the analyzed element where the deviation from the draft direction at any points, corresponds to specified values.
3). Parting Surface:
Generally, injection mold has two major components: the movable halves and fixed halve. During injection molding process these halves are pressed tightly from a sealed hollow to avoid the melt flow leakage and maintain certain holding pressure, the pressed surface called as parting surface, usually parting surface is the biggest projection outline surface of the part.
Parting surface design directly affects the product quality, ease of construction and operation of the injection mold
4). Parting Line:
Parting line are where the two halves of the mold meet. This generally create a physical line on a part that is both visible and noticeable to the touch. These lines however can be hidden or minimized when placed along edges of the part. It is represented by dotted line in the below picture
CORE AND CAVITY design for switch bezel:
core and cavity:
A core is the one part of the mould.and it is respponsible for half of the molded part. actually core is the projection of the bodyand cavity is the depression of the body. these core and cavity combines to form a mould. then the plastic material injected into these mould to get a plastic part.
5). Core design:
6). Cavity Design:
The cavity is the part where the injector and filling of the molten plastic happens. The cavity block is prepared by trimming extrapolated B surface and same profile used in core for rectangular block to extrude along the tooling direction.
The achieved surface is filled and joined to create closed surface as shown picture
Core and Cavity Design:
The mold core and cavity are shaped sections in either half of the mold tool which give the plastic product its final shape. The hot molten material is injected into the core and cavity and then sets hard into shape. The design of the core and cavity is essential in the correct formation of the product. The sequence of events during the injection mold of a plastic part is called the injection molding cycle. The cycle begins when the mold closes, followed by the injection of the polymer into the mold cavity. A core is usually made of the best quality sand and is placed into the desired position in the mold cavity. Core prints are added to both sides of the pattern to create impressions that allow the core to be supported and held at both ends
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