THIẾT TRÌNH THIẾT KẾ CHẾ TẠO KHUÔN MẪU ĐỦ 25 BÀI_16_EN

Propulsion system products  The taking product: robot arm, craft, propulsion system Handmade  - The worker will take the product, check the product and tails cut glue (if any) after each injection cycle Usually applied to the large, difficult layout propulsion system on site, or to check out the quality of injection products Using a robotic arm system applying advanced automation but high initial costs Use product-push system,  This is most often used Presenting tasks, technical requirements  After the product is cooled in the mold, the mold is opened, at which point the remaining adhesive on cavity due to the suction of a vacuum and the product tends to shrink after the cooling system should push to eject product out technical requirement   There are about push and thrust appropriate to push the product Can take the product out easily and does not affect the shape of the product, the product's aesthetics  Propulsion Propulsion system system must must reside reside on on the the mobile mobile site site (site (site 22 sheets) sheets) Hệ thống đẩy dùng chốt đẩy: Đây hệ thống đẩy dùng phổ biến The propulsion system used Cell Plates, Sheets push, push Fasteners, Fasteners recovery, Plates mobile site, Plates hold  Using closed late  Use the key in the latch and push  Use dungj springs to recover  Sometimes too many key push push in clusters, or clusters rather thin thrust, or thrust unbalanced, tilted key may push after if push b) push the tongue thrust system:? the more thin-walled and complex shapes Using the blade push Using thruster propulsion system: to push the more rounded swing Using thruster propulsion system d) System uses push-off plate: Used to push the detail is cylindrical or round shape chunhat box into thin thickness    Used to push the more rounded or rectangular thin-wall thickness Advantage: products always achieve aesthetic because no traces key push Cons: use larger thrust than other methods Pneumatic propulsion systems: Used for deep cavity products such as buckets, pots, Arrange the flows through two gas valves on both panels mold to obtain the product 4 Điều khiển hệ thống đẩya) Gia tốc thêm cho chốt đẩy: Dùng cấu rang bánh rang để gia tốc thêm cho chốt đẩy        hrust PROPERTIES    -α: coefficient which represents an increase (cm / oC) -FP = Thrust (N) E: elastic modulus (N / cm2) -A: Total surface area in contact with the cavity hoaccore (Cm 2) -μ: coefficient of friction of plastic -m: horizontal distortion coefficients -d: the diameter of the largest circle circumference by the circumference of the perpendicular projection of the direction molded sp -Δ�: The sp softening temperature (oC) -t: The average thickness of the sp (cm) When to use faint company, lighten tube, plate favorable (abdomen) and Pneumatic  Pneumatic propulsion system  For products with deep cavity such as buckets, pots, because when the cold, the vacuum in the mold cavity and core are so large, the product is difficult to escape the mold Therefore, it should provide a big boost and distributed evenly to push the drain pan My advice is to use compressed air to remove panels combine to get the product companies back   About push to ÷ 10 mm larger than the product height After the product is removed, the propulsion system must return its original position, avoiding damage Plunger cavity So to latch back on (companies in) Plunger  - Products with high surrounding walls, or deep veins, then the stick so firmly in the mold (core section), so must be arranged near the company pushing this position to be able to push the product out of the mold easily