A few years ago TAD expanded its product range, based mainly on vibration, with other electromechanical elements such as step feeders, which complement its wide range of possibilities for the supply of parts in any production process.
The step feeders, also called “ cascade feeders” or “oscillating strips”, are a necessary complement to traditional electromagnetic feeding for an entire typology of parts, due to their volume, surface finishes, aggressiveness, etc. they go beyond the acceptable limits in their handling using vibratory feeders.
They are especially suited for: pipes, rods, bushings, shafts, ball joints, pins, nuts and bolts, among others.
The feeder is usually comprised of 4 oscillating steps made of treated steel and an incorporated hopper, and it is powered by a geared motor.
The design of the steps, in each case complies with the pre-selection and dosage function of the parts in their transport (elevation) before their final orientation (using mechanical, pneumatic or other devices) and delivery to the corresponding production unit (by means of Link Units such as: gravity track, conveyor belt or linear vibrator).
The feeder is normally accompanied by an autonomy unit, also known as “hopper” or “bunker”, which is designed based on the requested capacity, contemplating width of 200 to 500 mm and lengths from 600 to 1500 mm. The conveyor belt is resistant to blows and tears and the sides of the hopper are coated with plastic material.
In the event of requiring ejection or evacuation of the parts from the autonomy unit, a folding rear flap is contemplated, which along with inversion of the conveyor’s motor direction, facilitates rapid emptying of the same.
A cabinet centralises the entire electric and pneumatic manoeuvre of the unit to enable its autonomous operation.
The parts to be fed define the step feeder model and the needs or constraints in its implementation are not an obstacle for its realisation (height load, capacity, speed, special regulations, etc.).
For adapting to our customers’ requirements we have several models ranging from a useful width of 250 mm to 1,000 mm, in standard formats, with the possibility of designing special custom formats if required.
The steps are operated using a 0.55 Kw three-phase geared motor and, in the version with electric cabinet, a speed adjuster is included.
Similarly, the level of the parts in the reception hopper is controlled by a photoelectric sensor or barrier that activates, or not, the hopper or parts storage (Autonomy Unit). The standard height for delivery of the parts is 1,050 +/- 25 mm. Other greater heights are not a problem.
These systems, widely accepted throughout Europe provide, as main defining features: versatility, excellent handling to the parts that are fed, reduction of the noise level, robustness, durability and ability to feed semi-heavy, bulky and abrasive parts.
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