Giáo trình NX Mold Wizard Design Process

Phần 1. Tổng quan về khuôn & Quy trình thiết kế khuôn ép nhựa. - Kết cấu khuôn - Quy trình khuôn ép nhựa - Giao diện & Công cụ thiết kế khuôn Phần 2. Kiểm tra sản phẩm trước khi phân khuôn - Kiểm tra góc Draft của sản phẩm so với hướng phân khuôn - Kiểm tra độ dày của chi tiết Phần 3: Phân khuôn (Từng bước cho 1 sản phẩm thực tế điển hình) - Bước 1. Cài đặt các thông số ban đầu cho chi tiết - Bước 2. Cài đặt gốc tọa độ cho tất cả các thành phần của khuôn - Bước 3. Xác định hệ số co ngót - Bước 4. Tạo phôi cho quá trình tạo Cavity và Core (Workpiecs) - Bước 5. Bịt kín các lỗ hở để tạo mặt phân khuôn phụ - Bước 6. Xác định các khối nằm trong Cavity, Core và Slide - Bước 7. Tạo mặt phân khuôn chính - Bước 8. Tiến hành tách thành 2 mảnh khuôn Cavity và Core - Bước 9. Sắp xếp 2 sản phẩm trên một lòng khuôn Phần 4: Mô phỏng dòng chảy nhựa bằng Advance Eassy Fill (MOLDEX 3D) - Tạo cổng phun nhựa - Gate wizard - Thiết kế kênh dẫn nhựa - Runner wizard Phần 5: Thiết kế khuôn hoàn chỉnh - Chọn áo khuôn - Mold Base Library - Thiết kế vòng định vị - Thiết kế bạc cuống phun - Sque Bushing - Thiết kế cổng phun - Gate - Thiết kế kênh dẫn nhựa - Runner - Thiết kế Slide - Cơ cấu kéo ngang - Thiết kế Lifter: Lưỡi đẩy, chốt đẩy - Thiết kế hệ thống làm mát - Cooling Systerm Phần 6: Mô phỏng khuôn ép nhựa Phần 7: Xuất bản vẽ Drawing trong Mold wizard

Mold Wizard Design Process 1.Initializing a mold design project Setting project defaults Design Intent In this activity you use specific part naming rules to replace the default rules The naming rules specified are to familiarize you with using name rules, and apply only to a series of activities in this course that are based on the mouse project Activity Launch the activity Setting project defaults Create a mouse project Choose Start All Applications Mold Wizard On the Mold Wizard toolbar, click Initialize Project 4CTECH.COM.VN t ng h p In the Open dialog box, navigate to your parts \ initialize folder, select mouse_case_upper, and click OK Design IntentThe original parts of the mouse are designed in inches The design intent is to create a metric tooling assembly In the Initialize Project dialog box, in the Project Settings group, in the Name box, clear the default text, type mouse, and press Enter From the Material list, select ABS From the Configuration list, if necessary, select Mold.V1 In the Settings group, from the Project Units list, select Millimeter Select the Rename Components check box Click Edit Material Data Base NoteThe material database is a list of materials and shrink factors You can add materials you use to the list, and set any shrink factor to match your experience Choosing a material is a convenient method to set a shrink factor The name of the material is not stored When you have examined the spreadsheet data, close the spreadsheet without saving it In the Initialize Project dialog box, click OK In the Part Name Management dialog box, in the Part Names group, verify whether the first part listed is mouse_top_000 Only if the numeric suffix for the top part mouse_top is not 000, the following: o In the Name Rules group, in the Next Part Name Number box, type and press Enter o In the Part Names group, click Set All Names Click OK 4CTECH.COM.VN t ng h p 2 Examine the project structure that was just created On the Resource bar, click the Assembly Navigator tab TipYou can keep the navigator open by clicking the push pin button corner of the Assembly Navigator title bar in the left The appearance of the button changes to indicate that the window is pinned in the open position Expand nodes mouse_layout_021, mouse_prod_003, and mouse_parting-set_020 and observe the names used NoteThe original product part is never renamed The numeric suffixes are assigned in sequence during your NX session, beginning with in each new session During this course, you are asked to reset the starting number to for each new assembly you initialize This is to make the numbers you see in NX match the examples in this student guide Choose Information Assemblies List Components What part is represented by its Empty reference set? The original product model, mouse_case_upper What part has different Units? The original product model, mouse_case_upper Close the Information window Examine the relationship between components of the product subassembly In the Assembly Navigator, select the original product component, mouse_case_upper 4CTECH.COM.VN t ng h p In the Dependencies group, click Expand Next Level dependent parts is revealed until the entire sequence of Observe the order of dependency The tree structure reflects the order in which the component bodies are WAVE linked Select the Advanced with full menus role On the Resource bar, click the Roles In the System Defaults group, select the tab Advanced with full menus role In the Load Role dialog box, click OK NoteThis course is designed for the Advanced with full menus role Save and close all parts Related information For more information:  Use the Command Finder to search for Initialize Project 2.Mold CSYS 4CTECH.COM.VN t ng h p Choosing and setting mold coordinate systems Design Intent The mouse project parts are modeled with a common coordinate system relative to the mouse assembly, regardless of how the individual parts are molded You must establish a suitable mold CSYS for each component Activity Launch the activity Choosing and setting mold coordinate systems Verify that the Mold Wizard application is running From your mold_csys folder, open mold_csys_top_010 Reposition the product so that a section of planar face is on the XY-plane (parting plane) of the mold tooling assembly On the Mold Wizard toolbar, click Mold CSYS CautionIt is important to click Mold CSYS before you adjust the working coordinate system When the Mold CSYS dialog box is open, the Mold Wizard software compensates for the origin of the shrinkage scale feature Right click the view background and choose Orient View Front The orientation of the WCS is suitable for the upper case, but the origin Z level (the XC-YC plane) is not convenient for molding The XC-YC plane should be at the principal parting plane 4CTECH.COM.VN t ng h p Design Intent You are going to position the WCS in the same plane as the flat section at the right side of the part in the preceding figure From the graphics area, double-click the WCS If necessary, select the origin handle of the dynamic CSYS On the Selection bar, if necessary, select Point on Face to turn the option on Click to indicate a point on the lip near the mid center of the flat region as shown in the following figure TipRotate the part to make it easy to select the point 4CTECH.COM.VN t ng h p The WCS is relocated to the end plane of the case: Click the middle mouse button to end WCS dynamics In the Mold CSYS dialog box, in the Change Product Position group, select Product Body Center In the Lock XYZ Position group, if necessary, select the Lock Z Position check box Click OK NoteThe mouse_csys_parting-set subassembly is repositioned in the mouse_csys_prod structure The WCS is now at the mold center, with ZC 0.0 at the main parting level Verify the shrinkage factor On the Mold Wizard toolbar, click Shrinkage NoteIn the Scale Body dialog box, in the Type group, you can see that you have a Uniform type scale feature In the Scale Factor group, you can see that the scale in the Uniform box is 1.006 The shrinkage for this mold has already been applied by specifying a Material from the Initialize Project dialog box Click Cancel 4CTECH.COM.VN t ng h p Save and close all parts Related information For more information:  Use the Command Finder to search for Mold CSYS 3.Workpiece Edit the workpiece sketch Design IntentIn this activity you are going to design a cylindrical user-defined insert Activity Launch the activity Edit the workpiece sketch Initialize the hub project using the information provided below: o First Part = /hub / hub o Project Name = hub (default) o Material = PC+ABS o Configuration = Mold.V1 o Project Units = default (Inch) o Name Rule = __??? o Next Number = 01 o Mold CSYS = Specify later 4CTECH.COM.VN t ng h p Specify the mold coordinate system for the hub On the Mold Wizard toolbar, click Mold CSYS Double-click the WCS Select the YC-ZC rotation handle on the plane at the base of the X-axis handle and rotate the WCS 90 degrees clockwise, so the Z-axis points along the cylinder axis in the direction shown 4CTECH.COM.VN t ng h p NoteNotice the two posts that create small holes for screws Find the configuration for the first sub-insert and specify the parameters Choose Information Object On the Selection bar, from the Type Filter list, select Edge Select the two circular edges at the bottom of the post with the smaller pin and click OK Design Intent The pin portion of the insert must be larger than the small pin shape and smaller than the hole that creates a post This leaves enough material to trim the sub-insert to match the cavity Design Intent The Information window shows the diameters to be 1.006 mm and 2.515 mm You are going to specify a diameter of 1.75 Close the Information window Create a self-cleaning sub-insert On the Mold Wizard toolbar, click Sub-insert Library In the Sub-insert design dialog box, from the Member View group, select CORE SUB INSERT From the Placement group, verify that Position is set to POINT From the Details group, set the following parameter Values: o SHAPE = ROUND 4CTECH.COM.VN t ng h p 141 o FOOT = ON o MATERIAL = P20 o X_Length = 1.75 o Z_LENGTH = 25 o FOOT_OFFSET_1 = o FOOT_HT = 20 NoteThe FOOT_HT distance in this case from the bottom face of the workpiece to the circular edge which will must match the part geometry exactly to create the self-cleaning shelf Locate the insert in the core In the Sub-insert Design dialog box, click OK In the Point dialog box, in the Type group, from the list, select Arc/Ellipse/Sphere Center Select any arc on the boss, as shown in the following figure and click OK In the Point Constructor dialog box, click Cancel CautionIf you specify another position, you are creating another instance of the same insert Orient the view according to your preference Examine the sub-insert Zoom in on the sub-insert 4CTECH.COM.VN t ng h p 142 Design Intent The diameter and length of the actual insert portion of the sub-insert is slightly longer and larger than the current pin shape in the core You are going to trim the sub-insert using the Trim Mold Components command Trim the sub-insert to the core surface Using the Window pull-down menu, make subinsert_top_010 the displayed part On the Mold Wizard toolbar, click Trim Mold Components As the target body, select the sub-insert Verify that the Trim Surface is set to CORE_TRIM_SHEET Click OK 10 Examine the results 4CTECH.COM.VN t ng h p 143 Using the Window pull-down menu, make subinsert_core_006 the displayed part Right-click the view background and choose Rendering Style Partially Shaded The core tip geometry may not display shaded due to the Partially Shaded status of newly trimmed faces 11 Display the false body Using the Window pull-down menu, make subinsert_top_010 the displayed part On the Mold Wizard toolbar, click Sub-insert Library Select the sub-insert you just created From the Placement group, from the Reference Set list, select False NoteThe false body is later subtracted from the core solid body to make a pocket for the sub-insert 4CTECH.COM.VN t ng h p 144 Change the display back to True NoteThe true body represents the actual sub-insert Click OK 12 Create a round core insert for the phone speaker geometry On the Mold Wizard toolbar, click Sub-insert Library In the Sub-insert design dialog box, from the Member View group, select CORE SUB INSERT From the Placement group, verify that Position is set to POINT From the Details group, set the following parameter Values: o SHAPE = ROUND o FOOT = ON o MATERIAL = S7 o X_Length = 11.0 o Z_LENGTH = 35 o FOOT_OFFSET_1 = 1.5 o FOOT_HT = In the Sub-insert Design dialog box, click OK In the Point dialog box, in the Type group, from the list, select Arc/Ellipse/Sphere Center Select any arc on the boss, as shown in the following figure and click OK In the Point Constructor dialog box, click Cancel 4CTECH.COM.VN t ng h p 145 13 Trim the speaker sub-insert to the core surface On the Mold Wizard toolbar, click Trim Mold Components As the target body, select the sub-insert Verify that the Trim Surface is set to CORE_TRIM_SHEET Click OK Your trimmed sub-insert should look like the illustration below 14 Save and close all parts Related information For more information: 4CTECH.COM.VN t ng h p 146  Use the Command Finder to search for Sub-insert Library  Use the Command Finder to search for Trim Mold Components 12 Gates and runners Placing gates The desk tray design specifies a submarine gate, centered approximately on the outer boss of the part Activity Launch the activity Placing gates Verify that the Mold Wizard application is active From your submarine_gate folder, open desk_tray_top_010 Prepare to configure the gate for the desk mount On the Mold Wizard toolbar, click Gate Library In the Gate Design dialog box, from the Balance group, select Yes From the Position group, select Cavity From the Type list, select tunnel Define the initial gate parameters Set the following parameters: 4CTECH.COM.VN t ng h p 147 TipRemember to press Enter after every change in the edit window d 1.5 A 15 HD 14 Define the gate location Click Apply In the Point dialog box, from the Type list, select Point on Face From the graphics area, verify which product assembly instance is the Work instance From the Work instance, select the outer conical face on the cavity side as shown in the following figure In the Location on Face group, in the U Parameter box, type a value of 0.75 and press Enter In the V Parameter box, type a value of 0.8 and press Enter in the Coordinates group, you should have approximately the same values as shown below: o X = 87.5 o Y = –25.621 o Z = 10.035 From the Point dialog box, click OK Define the gate direction In the Vector dialog box, in the Type group, from the list, select –YC Axis Click OK Orient to the Right side view and review your gates 4CTECH.COM.VN t ng h p 148 TipYou can see the gate body through the translucent workpiece You can also verify that the gate does not extend through the part surface far enough In the next step, you will refine the gate by editing parameters to see the effect of each change Refine the gate design In the Gate Design dialog box, from the parameter list, select OFFSET In the OFFSET edit box, type and press Enter Click Apply NoteThis is the typical process to refine a design by examining the results and iterating to a solution Zoom out and note that since you selected a Balance gate design, you have a same submarine gate at each cavity location In the Gate Design dialog box, click Cancel NoteFor this activity, consider the design to be complete 4CTECH.COM.VN t ng h p 149 You can use the Insert Design command to create inserts in tunnel gate areas Show all components In the Assembly Navigator, right-click the desk_tray_top_010 node and choose Show and Hide Show Save and close all parts Related information For more information:  Use the Command Finder to search for Gate Library Adding runners Design IntentYou are going to design a runner system to connect four gates Activity Launch the activity Adding runners Verify that the Mold Wizard application is active From your desk_runner folder, open desk_tray_top_010 4CTECH.COM.VN t ng h p 150 Simplify the display On the Mold Wizard toolbar, click View Manager Locate the Injection node Right-click the Runner / Gate node and choose Isolate Locate the Core / Cavity / Region node Click the gray check box for the Cavity node to show the component Close the View Manager Browser Create sketch to define the runner path Make desk_tray_fill_014 the work part On the Mold Wizard toolbar, click Runner In the Runner dialog box, in the Guide group, click Sketch Section In the Create Sketch dialog box, from the Plane Method list, select Create Datum CSYS 4CTECH.COM.VN t ng h p 151 From the Sketch Plane group, click Create Datum CSYS Click OK to accept the default Datum CSYS location Click OK to create the sketch using the default sketch plane Zoom in to the gates at the left side cavities Create a vertical line connecting the arc center of the large end of both gates as shown below: Zoom in to the gates at the right side cavities Create another vertical line connecting the end of both gates for the other two cavities 4CTECH.COM.VN t ng h p 152 Create a horizontal line connecting the midpoints on the vertical lines you just completed Verify that you now have three lines connecting the gates as shown below Click Finish Sketch Rotate the part as needed and review the runner preview 4CTECH.COM.VN t ng h p 153 Create the runner channels In the Runner dialog box, in the Section group, from the Section Type list, select Circular In the Parameters list, in the D row, double-click the Value In the Value box, type and press Enter NoteThe circular section runner is symmetric in the core and cavity so the runner vector setting is irrelevant Click Apply Edit the size of the main runner channel Design Intent You are going to edit the runner that connects the two channels You are going to specify a larger diameter In the Runner dialog box, in the Runner group, select Select Runner Body Select the runner that runs parallel to the X-axis 4CTECH.COM.VN t ng h p 154 In the Parameters list, in the D row, double-click the Value In the Value box, type and press Enter Click OK Change to a Shaded rendering style and review the completed runner and gates In a production environment, the next step would be to use the Pocket command to subtract the runner and gates from the core and cavity inserts In the Assembly Navigator, if necessary, double-click the node for the top level assembly to make it the work part Right-click the desk_tray_top_010 node and choose Show and Hide Show Save and close all parts Related information For more information:  Use the Command Finder to search for Runner 4CTECH.COM.VN t ng h p 155 .. .Mold Wizard Design Process 1.Initializing a mold design project Setting project defaults Design Intent In this activity you use specific part... With the Mold Wizard application running, from your workpiece folder, open user_body_top_010 Display the parting part On the Mold Wizard toolbar, click Mold Parting Tools On the Mold Wizard toolbar,... plane) of the mold tooling assembly On the Mold Wizard toolbar, click Mold CSYS CautionIt is important to click Mold CSYS before you adjust the working coordinate system When the Mold CSYS dialog