Pulp Model Molding Process And Mold Structure Optimization Design

Pulp molding products are mainly used in cushioning packaging products.Its raw material is paper fiber,with the advantages of low cost,easy degradation,good air permeability and so on.Pulp molding products is an environmentally friendly packaging materials,during the production and useing don’t cause pollution to the environment.But the domestic pulp molding products production technology is relatively backward,especiallly products of high production costs,low qualified and other issues limiting the development of pulp molding industrial products.In this paper,the production process of the existing pulp molding machine is optimized.To achieve its process optimization,focusing on the suction filter mold of midge pore structure,mold back cavity structure,the heating plate pore structure of the pressing mold and the mold holder suction filtration structures were optimization design,in order to improve the production efficiency and quality of products,reduce the cost of production.Firstly,the suction process stage,for shortening the time of mold suction pulp,improve the efficiency of suction molding and vacuum plasma uniformity,suction pulp of paper pulp molding suction molding hole parameters optimization.The article first through the theoretical analysis obtains pulp mold suction hole aperture size and the mutation of exit section are the factors affecting the pressure loss of suction slurry process,and using ANSYS/FLOTRAN simulation software separately for different aperture,different taper,different rounding radius mold grout hole model simulation analysis,comparative analysis of the optimal grout pore structure parameters.Secondly,in order to make the product release pressure more uniform,the mold release process of the suction filter is studied.First,the back mold cavity flow field of CFD three-dimensional numerical model was established,and on airflow distribution in the different opening rate,different layout position of numerical was simulated and analyzed.through the comparison and analysis of the air distribution plate of the best porosity and installation position;On the basis of determining the air distribution plate structure and the location,optimization of the back cavity structure,which airflow local energy loss can be reduced,after optimization to improve the average speed of the airflow outlet section,to further improve the efficiency of the product release.At the same time,in the thermoforming stage of the process,in order to improve the heating plate heat transfer efficiency and product quality,shorten product time thermoforming,using the thermal analysis module of ANSYS software of pulp molding press forming mold heating plate were studied,to optimize the pore structure of the original heating plate and got the optimization scheme of heating plate working surface temperature distribution is more uniform.Once again,the lightweight design of grout mold bracket for forming equipment of pulp molding product by using ANSYS design opt module.The space layout of the original suction pulp mould support is not compact,which limits the depth and strength of the suction filtering mould to be immersed in the slurry,and the strength is rich,and the optimization space exists.The optimized design method of the light weight of the structure of the pulp mould suction mould support structure was optimized,the volume and the total mass of the frame were reduced,and the production cost was saved.Finally,the optimized mold ceiling pulp optimum pore structure parameters and hot die pressing plate is improved and is verified by the experiment.The test results show that molding efficiency and quality are improved,and the optimization effect is obvious.