Keep length of synchronization mechanism as short as possible

 

There is a large gap between gate and insert

 

 

 

 

Material handle is too thick, which affects mold molding cycle. Generally, thickness is designed to be 3mm.

 

 

 

Adjust width of contour plate to increase area of contour plate

 

Drill more connecting water pipes and eliminate inclined water pipe design

 

Top, side and bottom corners need to be designed with appropriate process R angles to ensure that CNC machining can be directly processed in place; reduce workload of electrical machining; and avoid stress cracking.

 

For straight top, side and bottom corners, it is necessary to design appropriate process R angles to ensure that CNC machining can be directly processed in place; reduce workload of electrical machining and avoid stress cracking.

 

 

Picture above shows inspection of demoulding slope of lifter in length direction of mold. There is no need to design a descending slope for lifter on the left and right sides, and there is no need to design a 15-degree descending slope for lifter in the middle, which can significantly reduce slope. Otherwise three sets of lifters need to design auxiliary guide rods.

 

Oil pipe holes in B plate, adjust screw hole position, rearrange oil pipe holes, and cancel inclined oil pipe holes

 

Step of guide rod should be in contact with push plate to bear ejection force, and clamp block should bear reset tension. During the entire ejection and reset process, screw is not subjected to force.

 

End of guide rod is fixed with screws, and cooling water is led to push plate through O-ring. Sealing and fastening of guide rod should be designed on one plate as much as possible. If thickness of one plate is not enough, structure of fixing it on two plates can be adopted as shown in right figure.

 

 

CHW1005109\1005110 Design of lifting ring holes of push plate and ejector fixing plate is unreasonable. Push plate cannot be lifted after mold foot is installed.

 

 

 

  

 

 

 

 

 

Audi C7 design of dome bar at cross position of ribs needs to be approved by customers

 

Aud C7 For inserts that are too deep from back and inconvenient to remove, and there is no space on the front to design a larger insert, you can consider this solution: use a hexagonal socket wrench to tighten thread. But it needs to be approved by customer

 

Audi C7 grille uses 7-point feed inlets, 4 of which are through latent gates designed at the bottom of ribs.

 

1. Above picture is rear bumper of Polo. During mold trial, it was found that parting line position was wrong (blue line). Correct parting line should be green line. Generally, parting line is located on maximum contour line of product demolding direction. When parting line is in the middle of product, reasonable design solution is to design a boss, groove or step in parting line area, which can effectively avoid dislocation of parting surface caused by processing errors and affect product appearance.
2. Existing mold design uses a side gate, and gate is opened on die side. Since parting line is close to appearance surface, very high requirements are placed on trimming gate. Whether it is cut more or less, it will affect product appearance. On the other hand, if gate is close to appearance surface, there will be a defect of shrinkage in gate area. Reasonable design solution is to modify parting line in this area (as shown by purple dotted line) and design gate at edge of product, away from product appearance surface.
3. Add parting line inspection items (including sliders, lifters, inserts, etc.) involving product appearance to design checklist. This item must be checked and confirmed by design project person.

 

Straight top block shown in the figure has a spring core puller inside. Considering that tail of slider is worn during mass production and causes flash in hole, customer requires a wear-resistant plate to be installed at tail of slider. In fact, after wear-resistant plate is installed, locking area is sharply reduced (minus area of fixed outer ring and fastening screw), which is more susceptible to wear. It is recommended that locking area of tail of spring core puller slider be as large as possible; if a wear-resistant plate is to be installed, it must be installed on another component corresponding to tail of slider, and contact area cannot be less than area of tail of spring core puller slider.

 

Picture shows spring core puller on bumper die side. Customer took into account wear of slider tail during mass production, which caused flash on hole, and required slider tail to be inlaid with a wear-resistant plate. In fact, after wear-resistant plate is inlaid, locking area is sharply reduced (minus area of fixed outer ring and fastening screw), which is more susceptible to wear. It is recommended that locking area of spring core puller tail should be as large as possible; if a wear-resistant plate is to be inlaid, it must be inlaid on another component corresponding to slider tail, and contact area cannot be less than area of slider tail.

 

Picture shows spring core puller at trunk lid position on bumper punch side. Customer took into account wear of slider tail during mass production, which caused flash on hole, and required slider tail to be inlaid with a wear-resistant plate. In fact, after wear-resistant plate is inlaid, locking area is sharply reduced (minus area of fixed outer ring and fastening screw), which is more susceptible to wear. It is recommended that locking area of tail of spring core puller slider be as large as possible; if a wear-resistant plate is to be inlaid, it must be inlaid on another component corresponding to slider tail, and contact area cannot be less than area of slider tail.

 

 

In general, molds that use sequential valve injection molding are strictly prohibited from having cold slug handles, which can effectively avoid phenomenon of air entrapment. However, in special cases, requirement of not having a cold slug handle cannot be met. In order to prevent defect of air entrapment, a relatively long and large diameter cold slug hole is designed directly under hot nozzle (verified by Mercedes-Benz front bumper CHW080720)

 

CHW1005014 punch is 30mm, while width of guide rail installation fixing part is only 25mm, and there is a 5mm gap after installation

 

Inclined hole water channel processing technology
1. Bench marking
2. Boring machine sinking platform
3. Adjust angle of three-axis deep hole drill
4. Add a guide sleeve in front of deep hole drill head for guidance and sealing
5. Drill holes