Comparison Experimental Study on Apparent Porosity of Brake Linings for Car Based on Water Granulating Technology

2013 ◽  
Vol 773 ◽  
pp. 259-262
Author(s):  
Zhen Yu Wang ◽  
Tie Shan Wang ◽  
Li Song
Keyword(s):  
Experimental Study ◽  
Natural Frequency ◽  
Hot Pressing ◽  
Production Efficiency ◽  
Apparent Porosity ◽  
Cavity Volume ◽  
Pressing Time ◽  
Pressing Process

In this paper, the contrast test has been done on the brake linings that have been made by water granulating technology. As a result, by contrast with the brake linings that have been done at the same material and producing technology, it was preliminary demonstrated that the apparent porosity of the brake linings that have been made by the granulating technology could be enhanced greatly, so on the hot-pressing process, products exhausting has been easy, the die cavity volume could be decreased, the hot-pressing time could been shorten, the production efficiency could be enhanced, the natural frequency of the braking lining could be reduced, the possibility of the braking noise could be decreased.

Study on the Optimum Hot-Pressing Process and Surface Decoration of Waste Tetra Pak/Sawdust Composite Board

2013 ◽  
Vol 710 ◽  
pp. 147-151 ◽  
Author(s):  
Xiao Sun ◽  
Qiu Hui Zhang
Keyword(s):  
Hot Pressing ◽  
Resin Content ◽  
National Standard ◽  
Mass Ratio ◽  
Pressing Temperature ◽  
Composite Board ◽  
Pressing Time ◽  
Pressing Process ◽  
Surface Decoration ◽  
Tetra Pak

To improve the way of efficient recycling of waste Tetra Pak package, save wood materials and develope new packaging materials, this article studied on the optimum hot-pressing process and surface decoration of waste Tetra Pak/sawdust composite board. Using the orthogonal experimental method, we studied the effect of that four factors, such as resin content, hot-pressing temperature, hot-pressing time and Tetra Pak/sawdust mass ratio, on MOR, MOE, TS for 2h of waste Tetra Pak/sawdust composite board. And according to the measurement and analysis of these three test indicators of the board, we obtained the optimum hot-pressing process of waste Tetra Pak/sawdust composite board. The results showed the optimization of process parameters for the board was that: resin content for 14%, hot-pressing temperature for 150°C, hot-pressing time for 420s and Tetra Pak/sawdust mass ratio for 4:6 were suitable to product this board. At this point, the maximum MOR of the board was up to 23.1MPa, the maximum MOE of the board was up to 2917MPa, the minimum TS for 2h of the board was down to 6.1%. In the processing of PVC surface decoration, by using comparison tests, the results figured out that hot-pressing temperature for 50°C-60°C, hot-pressing time for 10s-20s, hot-pressing pressure beyond 0.02MPa were good for PVC to decorate this kind of board. The formaldehyde emission of this veneer composite board was 0.3mg/L, the surface abrasion resistance of it could reach 900r, besides, its performance of surface pollution resistance has reached the national standard.

The Pattern Simulation of New Woodiness Restructuring Decoration

2012 ◽  
Vol 184-185 ◽  
pp. 1328-1332
Author(s):  
Yi Liu ◽  
Guan Liu ◽  
Zhan Fu ◽  
Yi Ping Li ◽  
Hong Wu Guo
Keyword(s):  
Hot Pressing ◽  
Unit Area ◽  
Compression Molding ◽  
Mold Design ◽  
Technological Parameters ◽  
Pattern Design ◽  
Pressing Time ◽  
Pressing Process ◽  
Mould Design ◽  
Pattern Simulation

This paper used pattern design, colour design and mold design comprehensively, using compression molding and simulated carving technology, studying a way to realize the pattern simulation of woodiness restructuring decoration. The result showed that it’s feasible to simulate pattern of new woodiness restructuring decoration, and the adornment effect was good. The line of the simulated pattern needed to be smooth. it’s better for the color in per unit area to be less. During the compression molding of board, the key point of decorative pattern simulation was the mould design. As adornment material instead of structural one, the technological parameters such as impregnation, pressure of hot pressing, time of hot pressing process during the process of preparation had a small effect on the adornment of board.

Hot-Pressing Process of the the API Adhesivepressed Veneer Straw Composite Panels

2013 ◽  
Vol 779-780 ◽  
pp. 348-351
Author(s):  
Shi Cheng Zhang ◽  
Jiu Yin Pang ◽  
Zhen Guo Gao
Keyword(s):  
Hot Pressing ◽  
Raw Materials ◽  
Crosslinking Agent ◽  
Economic Benefits ◽  
National Standard ◽  
Optimum Process ◽  
Composite Panels ◽  
Pressing Time ◽  
Pressing Process ◽  
Straw Composite

Using veneer and Straw shavings two kinds of raw materials to manufacture composite way veneer straw composite panels, Discussion the straw coverings density, hot-pressing process and other factors on the performance of the board, and a simple analysis of the economic benefits of such a plate. The results show that: The production veneer straw composite panels optimum process is pressing temperature 160°C, hot pressing time 1min/ mm, straw sizing quantity is 12%, API adhesive formulations：API adhesive formulations: Ratio of main agent PVA: SBR for 7:3, Crosslinking agent amount (P - MDI) 30% , density of not less than0.85g/cm³. The board each performance index of the optimal, fully able to meet the requirements of national standard, adopt the process sheet belongs to no aldehyde board.

scholarly journals Optimization of the Hot Pressing Process for Preparing Flax Fiber/PE Thermoplastic Composite

2019 ◽  
Vol 1 (1) ◽  
Author(s):  
Yiqi Wang ◽  
Guangpeng Cui ◽  
Zhujian Shao ◽  
Yongjie Bao ◽  
Hang Gao
Keyword(s):  
Tensile Strength ◽  
Taguchi Method ◽  
Process Parameters ◽  
Hot Pressing ◽  
Signal To Noise Ratio ◽  
Flax Fiber ◽  
Thermoplastic Composite ◽  
Pressing Time ◽  
Pressing Process ◽  
Design Experiments

The hot pressing process parameters were optimized to prepare flax fiber reinforced polyethylene (PE) thermoplastic composite by the Taguchi method. The optimal hot pressing process parameters were determined to increase the tensile strength of the composite. The optimal parameters of the design include the following sections: hot pressing temperature, pressure, hot pressing time and coupling agent modification time. An L9 (3*4) orthogonal matrix based on the Taguchi method was created. By means of analysis of signal-to-noise ratio and analysis of variance, the optimal hot pressing process parameters combination was found, compared to the average tensile strength in the nine design experiments, and the tensile strength was improved nearly 10%.

Study on Hot-Pressing Process of Low-Cost Straw Particle Board

2012 ◽  
Vol 204-208 ◽  
pp. 3624-3628
Author(s):  
Qi Fei Ling ◽  
Xin Gong Li ◽  
Yong Lin Yan
Keyword(s):  
Hot Pressing ◽  
Low Cost ◽  
Urea Formaldehyde ◽  
Particle Board ◽  
Pressing Temperature ◽  
Adhesive Resin ◽  
Board Density ◽  
Pressing Time ◽  
Pressing Process ◽  
Physics Performance

The mixture of isocyanate and urea-formaldehyde adhesive resin was used to manufacture low-cost straw particle board by hot-pressing process. Influence of the hot-pressing temperature, hot-pressing time, board density and the amount of isocyanate adhesive on straw particle board mechanical properties were studied. The resulted showed that, within a certain range, the straw particle board physics performance was improved with the increase of hot-pressing temperature, hot-pressing time, board density and the amount of isocyanate adhesive. The proper hot-pressing process of cost-straw particleboard is hot-pressing time for 40s/mm, MDI applied amount of 3%,a density of 0.7 g/cm3, hot-pressing temperature of 180 °C

Preparation of Superhydrophobic Fabric Based on the SiO 2 @PDFMA Nanocomposites by an Emulsion Graft Polymerization and a Hot‐Pressing Process

2021 ◽  
Vol 6 (22) ◽  
pp. 5646-5654
Author(s):  
Xiaoli Liu ◽  
Youcai Gu ◽  
Tengfei Mi ◽  
Yuehua Zhao ◽  
Xiaomei Wang ◽  
...  
Keyword(s):  
Hot Pressing ◽  
Graft Polymerization ◽  
Pressing Process

Modeling and Simulation of Optimal Blank Design and Hot Pressing Process for Manufacturing Large Francis Turbines Blades From Very Thick Plates

2013 ◽  
Author(s):  
Zhengkun Feng ◽  
Henri Champliaud ◽  
Louis Mathieu ◽  
Michel Sabourin
Keyword(s):  
Hot Pressing ◽  
Three Dimensional ◽  
High Strength ◽  
Production Costs ◽  
Francis Turbine ◽  
Thick Plates ◽  
Pressing Process ◽  
Blank Design ◽  
Cost Of Energy ◽  
Applied Forces

Hot pressing process is widely used in automotive, shipbuilding, energy production and civil engineering. However, the trial and error technique that is intensive time and energy consuming is still used. Particularly, the design of Francis turbines of hydropower plants is not standard, but variable from site to site due to hydraulic conditions and cost of energy. As a result, the blade hydraulic profile of each Francis turbine is different. The blades, one of the key components of Francis turbine runners, are produced in small batches and the setup of the dedicated punch and die increases significantly the unit production costs. In this paper, the blade unfolding process for optimal blank design will be firstly presented, and then a hot pressing process for very thick plates is proposed. The pressing process of high strength steel at hot temperature is characterized by thermo-mechanical behaviors, three-dimensional unsteady deformation, high nonlinearity, continuous local forming. The analyses of residual stress distribution and applied forces are carried out.

Comparison of resident performance in interpreting mammography results using a probabilistic or a natural frequency presentation: A multi-institutional randomized experimental study

2015 ◽  
Vol 28 (1) ◽  
pp. 29
Author(s):  
Pavlos Msaouel ◽  
Theocharis Kappos ◽  
Athanasios Tasoulis ◽  
AlexandrosP Apostolopoulos ◽  
Ioannis Lekkas ◽  
...  
Keyword(s):  
Experimental Study ◽  
Natural Frequency ◽  
Resident Performance

scholarly journals Environmentally-Friendly High-Density Polyethylene-Bonded Plywood Panels

Polymers ◽  
2019 ◽  
Vol 11 (7) ◽  
pp. 1166 ◽  
Author(s):  
Pavlo Bekhta ◽  
Ján Sedliačik
Keyword(s):  
Mechanical Properties ◽  
Hot Pressing ◽  
High Density Polyethylene ◽  
Phenol Formaldehyde ◽  
Urea Formaldehyde ◽  
Physical And Mechanical Properties ◽  
Core Layer ◽  
High Density ◽  
Pressing Pressure ◽  
Pressing Time

Thermoplastic films exhibit good potential to be used as adhesives for the production of veneer-based composites. This work presents the first effort to develop and evaluate composites based on alder veneers and high-density polyethylene (HDPE) film. The effects of hot-pressing temperature (140, 160, and 180 °C), hot-pressing pressure (0.8, 1.2, and 1.6 MPa), hot-pressing time (1, 2, 3, and 5 min), and type of adhesives on the physical and mechanical properties of alder plywood panels were investigated. The effects of these variables on the core-layer temperature during the hot pressing of multiplywood panels using various adhesives were also studied. Three types of adhesives were used: urea–formaldehyde (UF), phenol–formaldehyde (PF), and HDPE film. UF and PF adhesives were used for the comparison. The findings of this work indicate that formaldehyde-free HDPE film adhesive gave values of mechanical properties of alder plywood panels that are comparable to those obtained with traditional UF and PF adhesives, even though the adhesive dosage and pressing pressure were lower than when UF and PF adhesives were used. The obtained bonding strength values of HDPE-bonded alder plywood panels ranged from 0.74 to 2.38 MPa and met the European Standard EN 314-2 for Class 1 plywood. The optimum conditions for the bonding of HDPE plywood were 160 °C, 0.8 MPa, and 3 min.

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