A gyratory crusher has two crushing shells (4 5) defining between
them a crushing gap (6). In operation, the crushing gap is adjusted
as a function of the determined crushing-shell wear calculated on
the basis of reference data on the established rate of wear of the
crushing shells (4 5) in previous crushing operations involving
the same or a similar raw material. To adjust the particle size
distribution of the crushed goods and obtain the desired particle
size distribution curve, the crusher is operated with brief periods
of alternatingly different settings of the width of the crushing
gap (6) and/or with alternating crushing power or crushing force.
As each tube is fed into the feed chute of a fluorescent lamp tube
crusher, and regardless of the size of the tube, a sensor switch
in the chute immediately sends a count signal to an associated tube
counter, and also produces an inhibit signal which prevents a second
count signal from being applied to the counter for a predetermined
interval of time that is greater than the time it takes to grind
up a tube of a first size and that is less than the time it takes
to crush a tube of larger size. If at the end of the interval a
tube of larger size is still being crushed, a second count signal
is applied to the counter.
The invention is a crusher having a fixed crusher member and a
vertically reciprocating crusher member. Reciprocation of the crusher
member is achieved by a pivoting arm located beneath the crusher
member which is preferably driven by a toggle mechanism located
to one side of the crusher.
A portable recycle crusher system has a hopper with inward and
downward sloping sides, and fold-out hopper extensions. A belt feeder
beneath the hopper slides on a slide deck made of a low friction,
wear-resistant plastic bolted to a steel plate to prevent tearing
of the belt when sharp pointed objects are dumped into the hopper.
Stopping and starting and speed of the belt are controlled by remote
radio control. Materials fall off the end of the belt feeder onto
a scalper, which allows fine materials to bypass a crusher. The
materials then enter a large rectangular opening of the crusher,
and approach rotating hammers at a proper angle and speed. The hammers
strike and break the materials and throw them against abrasion-resistant
plates. The broken materials fall between the spinning hammers and
through sizing screen steel grates, which provide positive product
size control. The materials fall onto a discharge conveyor, which
carries the materials away from the recycle crusher and scalper.
The hopper, conveyors, crusher and scalper are mounted on a rectangular
beam frame, which is supplied with an axle and wheels and a connector
for towing the crusher system on roads. An engine mounted on the
frame drives a hydraulic pump to operate the feeder and conveyor,
and mechanically drives the crusher.