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Truck of the Day : May 9, 2013; Welly Peterbuilt Cement Mixer
Topic Started: May 8 2013, 11:35 PM (950 Views)
craftymore
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Support your local demo derby.

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The truck for today is the Welly Peterbuilt Cement Mixer.

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Wikipedia.com
 
A concrete mixer (also commonly called a cement mixer) is a device that homogeneously combines cement, aggregate such as sand or gravel, and water to form concrete. A typical concrete mixer uses a revolving drum to mix the components. For smaller volume works portable concrete mixers are often used so that the concrete can be made at the construction site, giving the workers ample time to use the concrete before it hardens. An alternative to a machine is mixing concrete or cement by hand. This is usually done in a wheelbarrow; however, several companies have recently begun to sell modified tarps for this purpose.


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Wikipedia.com
 
Special concrete transport trucks (in–transit mixers) are made to transport and mix concrete up to the construction site. They can be charged with dry materials and water, with the mixing occurring during transport. With this process, the material has already been mixing. The concrete mixing transport truck maintains the material's liquid state through agitation, or turning of the drum, until delivery. The interior of the drum on a concrete mixing truck is fitted with a spiral blade. In one rotational direction, the concrete is pushed deeper into the drum. This is the direction the drum is rotated while the concrete is being transported to the building site. This is known as "charging" the mixer. When the drum rotates in the other direction, the Archimedes' screw-type arrangement "discharges", or forces the concrete out of the drum. From there it may go onto chutes to guide the viscous concrete directly to the job site. If the truck cannot get close enough to the site to use the chutes, the concrete may be discharged into a concrete pump, connected to a flexible hose, or onto a conveyor belt which can be extended some distance (typically ten or more meters). A pump provides the means to move the material to precise locations, multi-floor buildings, and other distance prohibitive locations. The drum is traditionally made of steel but on some newer trucks as a weight reduction measure, fiberglass has been used.
"Rear discharge" trucks require both a driver and a "chuteman" to guide the truck and chute back and forth to place concrete in the manner suitable to the contractor. Newer "front discharge" trucks have controls inside the cab of the truck to allow the driver to move the chute in all directions. The first front discharge mixer was designed and built by Royal W. Sims of Holladay, Utah.

Concrete mixers are equipped with anywhere from two axles and up. Four, five and six axle trucks are the most common with the number being determined by the load and local legislation governing allowable loads on the road. These are necessary to distribute the load evenly and allow operation on weight restricted roads and to reduce wear and tear on normal roads. A two or three axle truck during the winter when road weight limits are reduced has no usable payload in many jurisdictions. Other areas may require expensive permits to operate. Additional axles other than those used for steering ("steers") or drivetrain ("drives") may be installed between the steers and drives or behind the drives. Mixers commonly will have multiple steering axles as well, which generally result in very large turning radii. To facilitate maneuvering the additional axles may be "lift axles" which allows them to be raised off the ground so that they do not scrub (get dragged sideways across the ground) on tight turns, or increase the vehicle's turning radius. Axles installed behind the drives are known as "tag axles" or "booster axles", and are often equipped to turn opposite to the steering axle to reduce scrubbing and automatically lift when the truck is put into a reverse gear.


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In the 1980s, Welly copied countless Tomica models from the Pocket Cars line. Among them was a Peterbuilt truck. Tomica and thus Welly offered this in multiple configurations. Among them was a tow truck with dual booms, a dump truck, silo truck and the cement mixer truck as shown. This is a childhood survivor from my collection.

It's always been thought that this was a Welly model though I have seen Real Toy deemed the maker by some reports.

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Edited by craftymore, May 8 2013, 11:36 PM.
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juantoo3
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~~~~~~~~~~~~~~

I spent the better part of ten years in another life working in the construction trades, so I have a big soft spot for construction equipment in diecast.

I love it.
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Dean-o-mite
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Muscle Car
Definitely a Welly and not a Realtoy. At the time this was new, Realtoy wasn't even around yet. This is in great condition for a childhood survivor. I like this one. A lot!
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Stampede
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Team Canada
Looks really nice! Very realistic!
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ivantt
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New casting? Quick! Take it apart!
The cab is pretty good, but the plastic drum area looks toyish.....BUT!!! The more I look at it, with some detail painting, this could really look first class and very realistic.
I see a lot of potential here to make a really nice model. :thumbup:
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pjedsel
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Muscle Car
A typical Welly model - basic detail and great play value as a construction related vehicle.
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