锁模力计算（Clamping force calculation）.docVIP

锁模力计算（Clamping force calculation） ............... Clamping force is often calculated in four ways: Methods: 1 Formula 1 clamping force (T) = clamping force constant Kp* product S (CM*CM) Kp projection area experience value: PS/PE/PP - 0.32 - PA - ABS; 0.30~0.48; 0.64~0.72; POM - 0.64~0.72 - 0.64~0.72; glass fiber; other engineering plastics - 0.64~0.8; for example: a product projection area 410CM^2, the material is PE, clamping force calculation. The calculated by the formula: P=Kp*S=0.32*410=131.2 (T), or 150T machine. Method 2: empirical formula 2350bar*S (cm^2) /1000., as above question, 350*410/1000=143.5T, select 150T machine tools. The above two methods for calculating method of coarse adjustment, the accurate method for calculation of 3: Calculation of clamping force are two important factors: the pressure of 2. cavity 1. projection area 1, projection area (S) is the largest area of mould watch get along. 2, determine the cavity pressure (P) cavity pressure influenced by the following factors (1) the number and location of the gate (2) gate size (3) product wall thickness (4) using plastic viscosity (5) injection speed packet flow characteristics of thermoplastic plastic 3.1 first group GPPS HIPS TPS PE-LD PE-LLD PE-MD PE-HD PP-H PP-CO PP-EPDM PA6 PA66PA11/12 PBT second group PETP third group CA CAB CAP CP EVA PEEL PUR/TPU PPVC ABS AAS/ASA SAN MBS PPS fourth PPO-M BDS POM fifth PMMA PC/ABSPC/PBT sixth PC group group PES PSU PEI PEEK above UPVC3.2 viscosity grades in each group of plastic has a viscosity (mobility) grade. The relative viscosity of each grade plastics are as follows: the group multiplication constant (K) group 1 * 1 ~ 1.35 * 1.3 group second group third group fourth * 1.35 ~ 1.45 * 1.45 ~ 1.55 * 1.55 ~ 1.70 group fifth group sixth * 1.70 ~ 1.903.3 cavity pressure depends on the wall thickness and the ratio of wall thickness and flow table P0? P=P0? K (double constant) 3.4 clamping force of (F) F=P? S= P0? K? S parts such as: Polycarbonate (PC)