THIẾT TRÌNH THIẾT KẾ CHẾ TẠO KHUÔN MẪU ĐỦ 25 BÀI_14_EN

Cooling system Mission,?  If the cooling system for a specific cause has not taken the heat out mold effectively, making the temperature in the mold constantly increasing, which increases the production cycle technical requirement    Keep the temperature stable mold for plastic materials can heat evenly 91 - Cooled Fast, avoid the not heat up, causing a distortion products caused defects - Reduce the cycle time, increase production capacity The components of the cooling system in plastic injection mold Arrange the cooling tube Laws designed to cool channel Làm nguội Lưu ý  Channel should cool to near surface cavity to better cooling Design waterline so that input and output  -The Split cooling channels into the cooling loop Channel Cooling  - Cooling channels must be drilled to create roughness turbulence helps better heat exchanger 3-5 times laminar flow -The cooling a surface water b / c -Members metal mold plastic components d index Design of cooling channels              The thickness of the product (mm) Cooling channel diameter (mm) Distance plate cooling channels to the product The distance between the two plates of cold channel ÷ (0:08 ÷ 0:16) 10 ÷ 12 (0:40 ÷ 0:47) ÷ 2.5D ÷ 3d ÷ (0:16 ÷ 0:24) 12 ÷ 14 (0:47 ÷ 0:55) d) Cooling System hole gradually form e) cooling system spiral Details used in the cooling system a) Các nút chỉnh dòng (pressure plugs) Buttons and sticks deflecting line (diverting plug and rod) A sort button and stick to deflect the line Vách tròn (bubbler tube) Là loại ống dùng để làm nguội lõi nhỏ cấy vào khuôn Vách phẳng vách xoắn (baffle or spiral baffle) Ống dẫn nhiệt (thermal pin)  Implants used to cool the core or cores slipped over the side Đầu nối chuyển tiếp (elbow) Đầu nối (connector) Coolant distribution pipes Calculate the cooling water flow Calculated cooling time    Tc = Smax x (1 + 2xSmax) Example: Tc = 2.5x (1 + 2x2.5) = 15 (s), 2.5 m thick products Where simple, timed cooling with wall thickness from ÷ products mm, a mold temperature below 60ºC m  Where the mold temperature is higher than 60ºC plus cooling time by 30%: Cooling time of several types of details [...]... (pressure plugs) Buttons and sticks deflecting line (diverting plug and rod) A sort button and stick to deflect the line Vách tròn (bubbler tube) Là loại ống dùng để làm nguội những lõi nhỏ được cấy vào khuôn Vách phẳng hoặc vách xoắn (baffle or spiral baffle) Ống dẫn nhiệt (thermal pin)  Implants used to cool the core or cores slipped over the side Đầu nối chuyển tiếp (elbow) Đầu nối (connector) Coolant