First, semi-trailer classification
a) general purpose truck semi-trailer general purpose goo DS Semi-trailer A general truck semi-trailer is a semi-trailer that carries goods within an open (planar) or enclosed (ber) cargo space.
b) Dedicated semi-trailer sPEciALSemi?trailer Dedicated semi-trailer is semi-trailer, designed and technically used as follows: special arrangements are required to carry personnel and/or cargo; only certain prescribed transportation tasks are performed. (For example, log semitrailer, fire semitrailer, low floor semitrailer, air compressor semitrailer, etc.).
c) Caravansemi?trailer semi-trailer semi-trailer is a semi-trailer capable of providing active sleepers.
d) Central axle trailer centralaxletrailer The central axle trailer is a trailer that cannot move vertically (relative to the trailer) and the axle is located close to the center of gravity of the trailer (when the load is uniform). This vehicle has only a small vertical static load. For tractors, no more than 10% of the maximum mass of the trailer or a load of 1000N (whichever is less). One or more axes can be driven by a tractor.
v) The in-car trailer for caravan is a mid-axle trailer that can provide active sleepers. 6. Bus semi-trailer Bus semi-trailer is a semi-trailer designed to carry passengers and their carry-on baggage on their design and technical features.
Second, what is a semi-trailer
The semi-trailer is a trailer that is positioned behind the center of gravity of the vehicle (when the vehicle is uniformly loaded) and is equipped with a coupling device that can transmit horizontal or vertical forces to the tractor. In the standard GB/T 3730.1-2001, the semi-trailer is defined as: “An unpowered road vehicle that can be used normally for the purpose of vehicle traction for its design and technical characteristics. It is used for carrying people and goodsâ€. From this definition, it is not difficult to see that “flight-hanging transportation†is a feature of semi-trailer transportation. The greatest advantage of this mode of transportation is convenience, speed, and economy, which is why the semitrailer occupies the largest proportion of the total number of special vehicles. There are many types of semi-trailers, including van semi-trailers, tank semi-trailers, flat semi-trailers, container semi-trailers, vehicle semi-trailers and so on.
Classification of tablet press: Models can be divided into single punch tablet press, rotary tablet press, sub-high speed rotary tablet press, automatic high speed tablet press and rotary core tablet press.
The sheet shape pressed by the tablet press is initially flat circular, and later developed into shallow circular arc and deep circular arc on both sides, which is for the need of coating. With the development of special-shaped tablet press, oval, triangle, oblong, square, diamond, circular ring tablets followed. In addition, with the continuous development of preparations, due to the requirements of compound preparations and timed release preparations, special tablets such as double layer, triple layer and core coating are made, which need to be completed on special tablet press.
Rotary tablet press is a machine which is made of several pairs of die distributed on the turntable to make a circular lifting movement according to a certain track and press the granular material into tablet through the press wheel. And the stamping rod with the rotary table rotating speed ≥60m/min line press is called high-speed rotary tablet press, this high-speed rotary tablet press has a forced feeding mechanism, the machine is controlled by PLC, has the automatic adjustment of pressure, control the weight of the piece, eliminate the waste piece, print data, display fault shutdown and other functions, in addition to the control of the weight difference within a certain range, Quality problems such as missing Angle and loose lobe can be automatically identified and eliminated.
With the development of market demand, the scope of application of tablet press is more and more wide, no longer simply limited to the suppression of Chinese and Western medicine tablets, more widely suppressed health food, veterinary medicine tablets, chemical tablets: such as mothballs, washing blocks, smurf blocks, art powder, pesticide tablets, food tablets: chicken essence block, isatis root block, divine Qu tea block, compressed biscuits.
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