UG injection mold design process sharing, suggest collection
The injection mold design process, let’s analyze with you my design experience and ideas below:
The first step: product analysis and modification, determine the mold structure, and the shrink diagram:
1. Product analysis:
Mold opening direction, parting line and parting surface, shape size, thickness, draft angle, undercut and corresponding core pulling method, glue feeding point and glue feeding method, mold cavity number, etc.
2. Transfer engineering drawings:
Use three-dimensional software to produce pictures, and generally create three views: the first main view (projection on the back mold surface), the second and the third three-dimensional diagram (outer surface and inner surface). Other views are placed according to the third angle method or the first angle method, and the section view (X and Y, the cutting position line passes through the important position center, undercut, column position, hole position, pillow position, etc.), save the file in DXF format, to CAD opens the label processing.
3. Shrunk drawing:
Mirror the drawing of the previous step and enlarge it by a multiple of the shrinkage rate. (Indicated: MI, shrinkage rate)
Step 2: Product ranking: How to arrange in the mold. Considerations: mold length and width, product cavity number, glue feeding position, interval (strength, what parts can be placed). The first view is the back mold. The side plan view grasps the front view, the second view is the front mold side plan view, first mirror the center line of the first view to the front right, then grasp the rear view, and then place the third X-direction sectional view on the front mold side plan view. Below, the Y-direction cross-sectional view of the fourth view is on the right side of the top view of the front mold side.
Step 5: Assemble the mold core into the mold base
The sixth step: mold core and mold base installation and positioning design
Step 7: Parting line, pillow position, insert design
Step 8: If the customer's product has an undercut, design a core-pulling mechanism such as a row or inclined top design
Step 9: Design the gating system (direct gate, side gate, submerged gate, horn type, point gate, fan gate, tap gate, etc.)
Step 10: If it is a fine nozzle mold, then design the shutter and plug screw
The eleventh step: exhaust system design (exhaust slot position and product overflow value)
The twelfth step: ejection system design (thimble, inclined ejector, cylinder, ejector block, push plate, gas cap, etc.)
The thirteenth step: cooling system design (waterway style such as straight-through, stepped, partition, spiral, etc.)
Step 14: Opening of auxiliary parts (spring, trash nails, struts, center support, lock template, buckle machine, side lock, balance block, limit block, die hole, mold prying hole, etc.)
Step 15: Check and modify, view supplement and position adjustment
Step 16: 2D to 3D split mode or full 3D
Step 17: Dismantling the parts map (3D+2D)
The eighteenth step: drawing review, change the drawing
Step 19: Print and archive the drawings after they are qualified
Step 20: Send the drawings to the mold manufacturing workshop for processing
The above mold design starts from the customer's 3D drawing to the design of the mold drawing to the entire process of processing. I hope it will be helpful to you! The drawings provided by customers generally have the following situations:
1. The customer gives the approved plastic drawing (two-dimensional electronic drawing file) and technical specification requirements (in this case, three-dimensional software is required to build a 3D drawing).
2. Given 3D drawing file, process it into 2D drawing (out engineering drawing).
3. Given a template (prototype), 2D and 3D maps need to be surveyed and drawn at this time.
There are generally three of the above. The second case is the most common, that is, the customer product designer has designed a 3D product to open the mold for you. Mold design engineers need to draw drawings: finished engineering drawings, shrink drawings, mold assembly drawings, parts drawings, mold ejection schematics, modified mold drawings, etc., and what I wrote is in order.