Optimization Design Of The Double Bend Elbow Of Injection Molding Machine

Mechanical parts of the injection molding machine consists of mold clamping mechanism and injection mechanism,the clamping mechanism is one of the important parts in the injection molding machine,mold clamping mechanism is the main function of accurate completion of mold closing and opening mould process,provide adequate clamping force and ejection products.The rigidity of the mold closing mechanism system has a great influence on the force of the mold closing and thus affects the quality of products.Speed transmission ratio is one of the important motion characteristics of the injection molding machine mold closing mechanism.The force amplification ratio has the greatest influence on the total energy consumption of the injection molding machine.At the beginning of the design,it is necessary to consider that a small cylinder thrust can generate a large mold closing force,so as to reduce the power consumptionPapers in the familiar with the present situation of clamping mechanism,on the basis of focus on the most widely used domestic hyperbolic elbow five connecting rod the work principle of inclined line type clamping mechanism,studies systematically the convolution model agency,in order to make the mould clamping mould clamping mechanism to optimize performance for the purpose,main content is as follows:(1)Theoretical analysis is carried out for the two-bend elbow and five-bar linkage.In existing optimization design theory and method on the basis of the analysis of dynamic template in the clamping mechanism,clamping speed and acceleration,force magnification ratio and clamping force and toggle the relationship between the parameters,such as to establish its mathematical expression.(2)In pursuit of larger clamping mechanism force magnification than M and stroke than W as objective function,but because the two incompatible,so the by product of the two largest as the optimization goal,get the ideal power ratio and speed of moving mold clamping mechanism.By programming in MATLAB,the optimization design of all parameters of the closing mechanism can effectively improve the mold closing performance.(3)Establish a template three-dimensional entity model of clamping mechanism,imported to ANSYS Workbench,the clamping mechanism status template of finite element analysis,get the template deformation,stress distribution,in order to check the strength of the clamping mechanism,using the Shape Optimization module to topology Optimization of a template,complete the template in meet the design requirements of lightweight design.(4)To create a simplified model of the hyperbolic elbow clamping mechanism,and then imported into ADAMS,the clamping mechanism in the ADAMS to add motion pair constraint and exert a speed driver,finally using ADAMS virtual prototype for dynamic simulation analysis,it is concluded that the cross of thrust block and dynamic template speed,acceleration and displacement curve,thus verified the hyperbolic elbow five connecting rod clamping mechanism of dynamic template in the process of closing speed satisfies the requirement of "slow-fast-slow" design.