Automatic material-supplying system

Using this system, roller materials were adjusted so that the ratio of the weight of BF and PP could be set at 50 50. Roller materials were supplied to the TSE and BE-reinforced PP pellets were manufactured. The screw rotated at a speed of 180 rpm and the sleeve temperature was set as 180 °C. In order to check the effectivity of this system, the tensile and flexural strengths with and without the system were compared. The results obtained are shown in figure 5.17. Bamboo fiber reinforced thermo plastics-automatically (BFRTP-AT)shows the case where 

3 Optimal Screw Configuration and Influence of BF Fiber Diameter 

The BF was first classified by a sorter into three kinds according to the diameters of the fibers. The diameters were 88, 88-125, and 125-210 tm. As a result, six kinds of pellets were compared. Flere, the number of types of material at the entrance slot is two, and that of the BF diameter is three. However, aU fiber content was made into 60 wt96 in these cases. 

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The extrudable adhesives are supplied in the larger sized containers, 22-5 or 200 litres, which have been filled under controlled conditions to avoid the occlusion of air. The adhesive is distributed to the work locations from a centrally sited pump-house through a manifolded pipe network at moderate pressure. Care must be taken in the design of the pipework to ensure that there are no features which may lead to eventual partial or full blockages. A dual pumping system is normally used the adhesive is transferred from one container at a time and as the end is approached the system will automatically switch over to the other thereby providing a constant material supply. 

When considering the application of foam to hazardous material spills, key requirements include an adequate water supply, the foam concentrate, appropriate proportioning equipment, piping, foam makers, and discharge devices and protective equipment for the personnel involved. Activation may be automatic, but in most cases it is manual. There are four types of application systems. They include fixed, semifixed, mobile, and portable (NFPA 11, 1988). 

Locations where flammable liquids are loaded or unloaded should have adequate fire protection. A water spray system operated manually and automatically is the most economical and best for most materials. Where water supply is inadequate or unavailable, a dry chemical system can be engineered. Ultraviolet ray detectors are recommended for speed of operation and automatic discharge of the agent. 

In situations where it is not feasible to depend only on physical barriers, an isolation suite can be designed for working with these materials. Air locks and rooms that have negative differential pressure to the main hall ways are required, as well as HEPA-filtered inlet air and double-HEPA-filtered exhaust air. An uninterrupted power supply should be connected to the exhaust air handler to maintain a negative differential pressure if the suite is in operation during a power outage. If the exhaust air handler fails, all plant air handlers should be programmed to automatically turn off to minimize the potential for a positive differential pressure to develop. Each isolation suite may require a dedicated HVAC system.P l... 

These are usually used as part of an automatic system whereby a supply of a liquid colourant is metered into the plastic. As a let down material, substances such as liquid paraffin may be employed. It is essential to ask what the diluent is. 

Vacuum band dryers are suitable for all types of pastelike materials. Wet material is dried as it is transported on a moving band. Fleat is supplied by infrared low-temperature radiators or by contact with heated bands. A multiband vacuum dryer is shown in Figure 33.15. To allow continuous production, such dryers are equipped with an automatic discharge system that prevents dehermetization of the dryer chamber. Drying chambers that provide drying surface areas up to 120 m are available commercially. 

For manufacturers, RFID is able to support quality control by querying components and subassemblies as they enter the facility. For example, it can ensure that the correct components are included in an assembled item by automatically checking that all items from the Bill of Material are in place. Moreover, if used with appropriate modeling tools, it can help to predict the demand and supply for the products, which in turn determines the manufacturing plan, which is an essential input for the modem ERP and MRP systems. 

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