Optimization On Dry Hot-molding Of Plant-fiber Tableware Production And Study On The Molding Equipment

With the accelerating pace of urban life, fast-food industry grew in demand for quick dishes. In view of the traditional non-environmentally friendly plastic foam containers serious damage to the environment and human health, degradable tableware was attracted much attention because of biodegradable and environmental. Plant Fiber Tableware was processed with the production of low cost, abundant sources of raw materials, low energy consumption, applications to overcome the traditional dishes negative effects. The main contents of this paper were:1. Molding mechanism of plant fiber tableware dry method press forming was analyzed and researched. The plant fiber tableware dry pressing adhesive mechanism of each component, the role of the main components of straw, straw particle size of powder, dry forming potential properties, melting, material changes in chemical composition, mechanical properties were analyzed. The plant fiber tableware dry hot forming process was discussed.2. The plant fiber tableware dry hot forming processe was optimized. The molding pressure, molding temperature, molding time, these three key parameters were as independent variables, the quadratic regression orthogonal rotation experiments were designed to establish the appearance of forming tableware quality, compression mechanical properties of the regression model. Response surface analysis combined with analysis of the various independent variables and the interaction of forming the appearance of quality tablewar. Comprehensive evaluation method of dry pressing plant fiber appearance quality tableware, compression mechanical properties of the overall optimization were optimized, the establishment of comprehensive quality regression model.3. Plant fiber dry molding machine was developed. The plant dry pressing equipment, fiber main technical parameters was determined, the structure, dosing integrated molded parts and products automatically check the layout of the platform components were optimized, focus on the precise dosing technology, the heat balance technique, combination of tank technology, integrated hydraulic systems and automatic control system.4. Plant fiber products dry mechanical properties of hot pressing was analyzed. Finite element modeling method to simulate the molding tableware and theoretical analysis were adopted, the stress distribution molding utensils was got, without changing the material properties of the situation, change the appearance of forming tableware tableware products to improve the mechanical properties of a very big role, the shape of the mold design and predict the mechanical properties of tableware had an important supporting roleThe conclusion is:1. SAS software was used for variance analysis of regression equation and the t test, integrated performance index regressed pressing pressure, pressing time, temperature and compaction regression model was analyzed. The optimum parameters were as follows:mold temperature is 179℃, the first pressurized pressure 178bar, the first pressure time 9s.2. The KCJ-160 type of plant fiber molding machine was designed. the modular assembly machine designed, machine controls automatic, mechanical, hydraulic, pneumatic in integrated technology as one, integrated control by PLC, A/D analog-digital conversion digital automatic contro.3. The straw materials and utensils and the overall parameters of the mechanical properties of compression was determined; the optimal model of the two groups forming utensils was analyzed. the finite element analysis showed that the involvement of known material properties for the case of external design better predict the overall performance has played a very important supporting role.