【正文】 3. Using the principle of injection molding for molding plastic parts of mobile phones. 4. And injection mold design and drawing and assembly drawing die cavity, core and some other parts diagram. 5. Using Mastercam software to the mold cavity, core threedimensional surface modeling and NC machining simulation, and production CNC machining process. 6. The design process can be processed using puter simulation test. MasterCAM is today widely used CAD / CAM software. Rational use of CAD / CAM software can significantly improve the mechanical design and processing quality and efficiency. This mobile phone model and shell mold process, for example, flexible use of MasterCAM on how to carry out mechanical design and process were discussed. 5. Tooling design parts Rectangle using the Rectangle mand MasterCAM, Arc mand draws Top surface contour, and to do with the Fillet mand to fillet processing, drawing out the Top side. Through entity Solids / Extrude mand to get physical contours of tensile 12mm. In the Front view, use Spline Curves, Arc mand draws the arc curve surface of the phone curves. Similarly, the use of physical tension Extrude mand, select the Extrude Chain Cut Body Options window to make it to the front surface of the Top physical entities drawn shear, that is, the Boolean operation squeezed entities, resulting in cell phone curved surface. Select Solids → Fillet fillet on the entity made to plete the design of the mold parts. In the drawing process, the application layer functionality Level design is very helpful. The curve can be different, separate entities, each of the layers in place, and its name be distinguished. Nothing needed shielding layer, so that simplified view, clear, easy to modify, reduce operational errors. 6. Tooling design entity 1. Airframe design Set the position plane, the view plane are the Top plane, the (0,0) the lower left corner point positioning in the mobile phone, according to The prototype design is pleted parts. Mobile phone keypad and the body is not the same as a whole, in body manufacturing, should be key part of the hole, so the performance of the mold protrusion. 2. Button design Level Open in a new layer, set the position plane, the view plane are the Top plane, set the piece depth Z is 12, choose Create → Next Menu → Ellipse drawing two intersecting ellipses, select Modify → Trim trim two ellipses, plane contour lines are key. Symmetric keys for left and right, the election Xform → Mirror mirror in front of the mand to draw the button, and then draw in the middle of an ovalshaped button. Translate mand selected, select the three buttons in front to draw graphs and determine Translate Direction mand dialog box appears, select the type between two points in the translation dialog box, set the Operation option to Copy, Number Of Steps 3 to determine, through the Enter the coordinate location to get 12 basic phone keys. And then draw the top of the basic keys to a different function key. Surface design Side view into the view, with the Translate mand to move the location of keys, so that they are in the phone surface. Open Level, set up a new layer. Extrude mand to pull out of key with the entity. Although each key is not connected, but also can select stretch. Select Chain, and then select all the buttons at the same time stretch. In the choice of direction is not uniform when the problem occurs, you can use to modify Reverse It needs to change direction, to meet the requirements. Is set up click Done, Extrude Chain dialog box appears, select the Extrusion Operation, in accordance with the default Create Body, in the stretch from the input 2, press Ok to plete stretch. Chamfer on the keys, select Main Menu → Solids → Fillet mand, the main menu displays the menu pick entities pixels, set the Faces to Y, Edges, Solids for the N, and then pick up keys on the surface, select DoneDone and set the Radius to 1 generate fillets entity. This key design has been pleted. 3. Display screen design Physical layer hidden keys, reopen a layer, set the position plane, the view plane are the Top plane, the working depth is still 12. Click Create → Rectangle Draw a rectangle. The rectangle menu, select 1 Point input width 30, height 20, and select Create Center Point, type the rectangle in the center of the screen to determine the location of the rectangle to plete the r