Week 8 - Challenge 5 - Core & Cavity Design
Core & Cavity Design
Objective: To create the core and cavity for the switch bezel considering all design rules.
Tooling Axis:
it is the axis in which the direction core and cavity open. this is very important for the production of plastic components, most of the defects will be done improper tooling axis creation by the plastic designer. there are so many methods for the creation of a tooling axis intersect is one of the methods for creating the tooling axis
Bisect method: To do that rotate the part and see all directions and choose which direction will be comfortable then create the point on the base mostly create the point where the hole or pockets are given. and after that insert the tooling axis at that point. then first see in x-direction it ill clear the all faces of parts if not create a plane and intersect to each other. the following window will have appeared. the create the mean line and go to the y-direction and do the same process we are done in the x-direction. then bisect these all to get the main tooling axis. this tooling axis can be cleared all faces of the part
Draft Analysis:
The purpose of the draft analysis is to detect the part should be easily withdrawn from the core and cavity by using diffrent colour ranges. this analysis will be done by draft analysis command. for this command go to insert analysis feature draft analysis these are the following steps to do the draft analysis on the switch bezel first click the draft analysis command the following window will have appeared, and then change into the material mode. then click the compass and drag on the tooling axis. and then click on the part then the colour will change of the part and you can change the value using the scale option and also a running pint command used to find out the angle of part from the tooling axis. so you can modify the tooling axis by using the compass to get proper results.
Draft Analysis report for solid body core and cavity design for switch bezel DRAFT ANALYSIS REPORT FOR SOLID BODY CORE AND CAVITY design for a switch bezel, first of all, you have full knowledge about what is, cavity, parting surface, parting line etc.
core and cavity:
care is the one part of the mould and it is responsible for half of the moulded part. actually core is the projection of
the body and cavity are the depression of the body, these core and cavity combine to form a mould, then the plastic material injected into these moulds to get a plastic part.. parting surface: injection mould has two major components one is core and another is cavity during the injection moulding process.
these two halves are pressed tightly from a sealed hollow to avoid the melt flow leakage and maintain certainly
holding pressure, the pressed surface is called the parting surface, usually, the parting surface is the biggest projection
outline of the part
Parting line:
it is the area in which the parting surface and component meet Or it is a junction between core and cavity and the parting surface has some set of rules because the product quality mostly depends on the parting surface
DESIGN PARTING SURFACE SHOULD FOLLOW THE FOLLOWING PRINCIPLES:
Design the injection mould simply as possible Avoid or reduce side parting as much as possible to reduce the complexity of the mold making mold
- Ease of de-moulding as far as possible, for instance, the plastic parts should stay in a fixed half of injection and should be ejected by the ejection system to avoid, side de-moulding action.
- Ensure the dimension accuracy of the moulded parts Try to make the parts similar to dimension accuracy requirements in the same mould to reduce manufacturing and assembly errors.
- Ensure appearance requirement of moulded parts, finish or mismatch usually occurs on the parting surface, so the parting surfaces should not be designed on high-quality requirement surfaces.
- Ensure adequate venting if possible parting surface should be placed at the end of the mould flow.
- This is going to be the advantage of filing and venting.