Straw bale press
保安职责A baler is a piece of farm machinery ud to compress a cut and raked crop (such as hay, straw, or silage) into compact bales that are easy to handle, transport and store. Several different types of balers are commonly ud, each producing a different type of bales – rectangular or cylindrical, of various sizes, bound with twine, netting, or wire. Industrial balers are also ud in material recycling facilities, primarily for baling metal, plastic, or paper for transport.
Round baler
怎样炖牛肉最好吃>世界品牌五百强The most frequently ud type of baler in industrialized countries is the large round baler. It produces cylinder-shaped "round" or "rolled" bales. Grass is rolled up inside the baler using rubberized belts, fixed rollers, or a combination of the two. When the bale reaches a predetermined size, either netting or twine is wrapped around it to hold its shape. The back of the baler swings open, and the bale is discharged. The bales are complete at this stage, but they may also be wrapped in plastic sheeting by a bale wrapper, either to keep hay dry
when stored outside or convert damp grass into silage. Variable-chamber balers typically produce bales from 48 to 72 inches (120 to 180 cm) in diameter and up to 60 inches (150 cm) in width. The bales can weigh anywhere from 1,100 to 2,200 pounds (500 to 1,000 kg), depending upon size, material, and moisture content.
Originally conceived by Ummo Luebbens circa 1910, the first round baler did not e production until 1947, when Allis-Chalmers introduced the Roto-Baler. Marketed for the water-shedding and light weight properties of its hay bales, AC had sold nearly 70,000 units by the end of production in 1960.
The next major innovation came in 1972, when the Vermeer Company began lling its model 605 - the first modern round baler. Previously, round hay bales had been little more than lumps of grass tied together, but the Vermeer design ud belts to compact hay into a cylindrical shape as is en today.
Large rectangular baler
镜子里的自己Another type of baler in common u produces large rectangular bales, each bound with a half dozen or so strings of twine which are then knotted. Such bales are highly compacted and generally weigh somewhat more than round bales. In the prairies of Canada they are called prairie raptors.
Small rectangular baler
A type of baler which is less common today in some places but which is still prevalent in many countries such as New Zealand and Australia to the exclusion of large bales produces small rectangular (often called "square") bales. Each bale is about 15 in x 18 in x 40 in (40 x 45 x 100 cm). The bales are wrapped with two, three, or sometimes four strands of knotted twine. The bales are light enough for one person to handle, about 45 to 60 inches (1.1 to 1.5 m).
To form the bale, the material to be baled, (which is often hay or straw) in the windrow is lifted by tines in the baler's pickup. This material is then dragged or augered into a chamber that runs the length of one side of the baler. A combination plunger and knife mo我是哪种人
ves back and forth in the front end of this chamber. The knife, positioned just ahead of the plunger, cuts off the material at the spot where it enters the chamber from the pickup. The plunger rams the material rearwards, compressing it into the bales. A measuring device measures the amount of material that is being compresd and, at the appropriate length it triggers the mechanism (the knotter) that wraps the twine around the bale and ties it off. As the next bale is formed the tied one is driven out of the rear of the baling chamber onto the ground or onto a special wagon hooked to the rear of the baler. This process continues as long as there is material to be baled, and twine to tie it with. 幼儿园家访
This form of bale is not much ud in large-scale commercial agriculture, becau of the costs involved in handling many small bales. However, it enjoys some popularity in small-scale, low-mechanization agriculture and hor-keeping. Besides using simpler machinery and being easy to handle, the small bales can also be ud for insulation and building materials in straw-bale construction. Square bales will also generally weather better than round bales becau a more much den stack can be put up.
Convenience is also a major factor in farmers deciding to continue putting up square bales, as they make feeding and bedding in confined areas (stables, barns, etc.) much easier.
Many of the older balers are still to be found on farms today, particularly in dry areas, where bales can be left outside for long periods.
The automatic-baler for small square bales took on most of its prent form in 1940. It was first manufactured by the New Holland Ag and it ud a small petrol engine to provide operating power. It is bad on a 1937 invention for a twine-tie baler with automatic pick up.
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Wire balers
Bales prior to 1937 were manually wire-tied with two baling wires. Even earlier, the baler was a stationary implement, driven by power take-off (PTO) and belt, with the hay being brought to the baler and fed in by hand. The biggest change to this type of baler since 19
战国策翻译40 is being powered by the tractor through its PTO, instead of by a built-in internal combustion engine.
In prent day production, small square balers can be ordered with twine knotters or wire tie knotters.
Pickup and handling methods
In the 1940s most farmers would bale hay in the field with a small tractor with 20 or less horpower, and the tied bales would be dropped onto the ground as the baler moved through the field. Another team of workers with hors and a flatbed wagon with would come by and u a sharp metal hook to grab the bale and throw it up onto the wagon while an assistant stacks the bale, for transport to the barn.
