Hot pressing

In this study, the factors related to the veneer material and adhesive properties were fixed; however, working conditions and process parameters (impregnation, pre-drying, curing, gluing, hot press) could affect the performance of plywood. Therefore, the objective of this work is to investigate the influence of two different processes (with and without curing before gluing) on bonding quality of the treated beech plywood.

8p vilarry 01-04-2024 9 1   Download

"Standard Specification for Zinc (Hot-Dip Galvanized) Coatings on Iron and Steel Products" covers the requirements for zinc coating (galvanizing) by the hot-dip process on iron and steel products made from rolled pressed and forged shapes, castings, plates, bars, and strips. This specification covers both unfabricated products and fabricated products, for example, assembled steel products, structural steel fabrications, large tubes already bent or welded before galvanizing, and wire work fabricated from uncoated steel wire.

8p hth_hn_vn 10-12-2023 6 4   Download

"Standard Practice for Locating the Thinnest Spot in a Zinc (Galvanized) Coating on Iron or Steel Articles" covers the procedure for locating, by the use of a solution of copper sulfate, the thinnest spot in a zinc coating (hot dipped, electroplated, or sprayed) on iron or steel articles that are coated after the shape is produced by casting, drawing, pressing, or other forming methods.

4p hth_hn_vn 10-12-2023 9 3   Download

In this work, glycerol and hot-pressing treatment were utilized to enhance the waterresistant and mechanical properties of microfibrillated cellulose (MFC) film. Recently, MFC films have been suggested as promising materials for various applications such as flexible electronics, micro-optical devices, and biosensors.

10p viengels 25-08-2023 4 2   Download

This study aimed to elucidate how the glass transition temperature and water interactions in cellulose esters are affected by the structures of their side chains. Cellulose acetate, cellulose acetate propionate and cellulose acetate butyrate with three fractions of butyrates, all having the same total degree of substitution, were selected, and hot-melt pressed.

11p viginny 30-12-2022 8 2   Download

In this work, two series of composite materials based on unsaturated polyester (UPE) resin and coffee husk powder were fabricated by a hot pressing method using methyl ethyl ketone peroxide (MEKP) as an initiator. The gel time of UPE resin is 32  2 min with 0.5 wt % of MEKP was determined according to ASTM D2471. The differential scanning calorimetry (DSC) reveals that the curing process should be post-cured.

9p visherylsandber 28-06-2022 27 5   Download

Samples were molded under a hot press and for each sample 50 test samples obtained by cutting them with a water jet. The obtained samples were characterized by TG, FTIR, and SEM. The effect of water absorption was evaluated by measuring percentage water absorption and flexural strength of samples over 9 months. The results revealed that filler addition lowers the damage created by distilled water a considerable amount and addition of hydrophobic fillers to epoxy matrix composites can be especially beneficial for applications where long-term water exposure is desired.

11p langthannam 29-12-2021 17 1   Download

This paper addresses the kinematic and dynamic modelling of a novel serial-parallel robot arm which has been designed and implemented for hot press forging industry in Vietnam. The robot is capable of replacing workers for transferring hot and heavy billets between a heating furnace and a hydraulic press machine of a forging station.

9p viwendy2711 05-10-2021 16 5   Download

In this work, a model is delivered, which highlights a simple mathematic relationship between the refractive index of an optical material and its transmittance spectrum measured by Fourier Transform Infrared Spectroscopy. Such model allows determining the refractive index of ceramics fabricated by hot-pressing of MgF2 nanoparticles. The reliability of this method has been verified on a silicon wafer taken as a reference (< 0.5%, discrepancy with data from literature on Si). Our approach can be applied to a variety of promising novel optical materials being developed.

9p cothumenhmong11 05-05-2021 25 1   Download

A new electromechanical press for fuel pellet manufacturing was built last year in partnership between CEA-Marcoule and ChampalleAlcen. This press was developed to shape pellets in a hot cell via remote handling. It has been qualified to show its robustness and to optimize the compaction cycle, thus obtaining a better sintered pellet profile and limiting damage.

9p christabelhuynh 30-05-2020 12 0   Download

This study focuses on 316L stainless steel fabricated by selective laser melting (SLM) in the context of nuclear application, and compares with a cold-rolled solution annealed 316L sample. The effect of heat treatment (HT) and hot isostatic pressing (HIP) on the microstructure and mechanical properties is discussed.

10p christabelhuynh 29-05-2020 14 2   Download

This paper different parameters of hot press curing were applied on the impregnated veneers for testing of chemical fixation and water related properties.

10p 12120609 18-03-2020 15 1   Download

In this study wheat straw was taken from Ankara province. In order to produce dry process MDF, urea formaldehyde resin was used at the ratio of 8 %, 10 % and 12 %, 1 % ammonium chloride was used as hardening agent on the basis of dry fiber weight. On the other hand, 5, 6 and 7 min. pressing times were applied. Alcohol benzene, cold water, hot water and 1 % NaOH solubility of wheat straw were 5.15 %, 7.31 %, 9.84 % and 40.79 % respectively. In addition, holocellulose, cellulose, lignin and ash contents were found as 74.79 %, 52.67 %, 20.17% and 4.21 % respectively.

7p thanhtoyz 17-10-2015 50 2   Download

A series of commercially manufactured medium density fiberboard (MDF) panels were exposed to a post-manufacture heat-treatment at various temperatures and durations using a hot press and just enough pressure to ensure firm contact between the panel and the press platens. Postmanufacture heat-treatment improved surface roughness of the exterior MDF panels. Panels treated at 225
C for 30 min had the smoothest surface while the roughest surface was found for the control panels.

7p thanhtoyz 17-10-2015 49 2   Download

A mathemalical model is presented that describes heat and moisture transfer during the holpressing of MDF. The model includes conduction of heat between the press platens and the central layer of the mattress, phase change of water from the adsorbed to the vapor state and the convective heat and mass transfer through the edges of the mattress. This approach results in a three-dimensional unsleady-state problem in which the properties of the wood fibers, water and the wood-water system are dependent on temperature, mattress moisture content and steam pressure.

22p thanhtoyz 17-10-2015 70 2   Download

Effect of wollastonite nanofibers on the improvement of thermal conductivity coefficient of Medium-Density Fiberboard (MDF) was studied here to find a possible solution to decrease hot-press time as a bottle-neck during composite production. Nanowollastonite was applied at 10%, based on the dry weight of wood fibers. Density of the control MDF boards was 0.66 g/cm3. Thermal conductivity coefficient was measured using an apparatus based on Fourier’s Law for heat conduction.

5p thanhtoyz 17-10-2015 49 2   Download

Car PC Hacks is the first book available to introduce and entrench you into the hot new car PC market. Expect innovation, tools, and fun experiments for creating a mobile multimedia center. This Hacks Series addition packs a punch in this comprehensive and easy-to-read guide. Whether you're venturing into car PC for the first time or an experienced hobbyist, hop in for a joy ride.

411p trac2_123 16-04-2013 46 7   Download

ON that summer day the sky over New York was unflecked by clouds, and the air hung motionless, the waves of heat undisturbed. The city was a vast oven where even the sounds of the coiling traffic in its streets seemed heavy and weary under the press of heat that poured down from above. In Washington Square, the urchins of the neighborhood splashed in the fountain, and the usual midday assortment of mothers, tramps and out-of-works lounged listlessly on the hot park benches. As a bowl, the Square was filled by the torrid sun, and the trees and grass drooped...

15p transang7 30-01-2013 38 2   Download

• This chapter aims to provide additional information on several techniques of metal forming processes other than those conventional process already mentioned in previous chapters. • The requirements for the process selection will be added, which are based on advantages and disadvantages of each type of non-conventional metal forming processes.

12p tieulac 27-11-2010 64 6   Download

News outlets today are abuzz with stories about blogs. In January 2005, Fortune magazine featured a story called “Why There’s No Escaping the Blog.” In May of the same year, “Blogs Will Change Your Business” screamed from the cover of Business- Week. Blogs have become so hot that some mainstream TV news reporters are quoting from the more popular blogs on the air. Un- fortunately, despite all the press coverage, little is being published about how blogs can benefit you and your business....

337p thanhdat 22-10-2009 309 115   Download