23. March 2013 08:35
Parts where the diameter is less than the length, those where the diameter is equal to the length and those where the diameter is more than the length as said to be belonging to different families of components when the requirement is feeding these through a vibratory bowl feeder. Hence, it is very difficult to accommodate all these families in a single vibratory bowl feeder. Hence, many bowl toolers, advice a single vibrator with multiple bowls to feed all these various bowls. However, an intelligent bowl tooler can design a bowl where one can feed all these components in the same bowl with very easy changeover tooling. In fact, Elscint recently manufactured a bowl feeder for feeding of steel tubes of various sizes. There were a total of 6 tubes. In case of some, the diameter was more than the length while in some cases the diameter was less than the length (length being more) and in the rest, the diameter was equal to the length. The orientation required was “standing” for one machine while for another it was “rolling”. A linear vibratory track was provided in case of the “standing” orientation while in case of rolling, gravity chute was provided. Elscint vibratory bowl feeder model 400 with a cast aluminum bowl was used for this purpose. The bowls were coated with Elscinthane PU coatings and the tooling was manufactured in stainless steel.
1. January 2013 09:41
Feeding of parts having no exact geometry or dimensions is difficult, especially while making a gravity chute or linear track. Such a component can be raw cashews. However, Elscint has developed a special vibratory bowl feeder for feeding of raw cashews. The cashews being raw and fresh have a lot of variation in their sizes. The sizes vary from 20 mm length to 40 mm length, width from 15 mm to 25 mm and height from 8 mm to 14 mm. Due to this huge variation, there is always a possibility of jamming. The orientation provided is lengthwise and a speed or feed rate of 100 parts per minute could be achieved. Elscint has designed a special type of tooling which ensures that all these sizes can be accommodated in a single bowl feeder and a speed of 100 parts per minute was possible. A cast aluminium bowl is used with Elscinthane PU coating. This increases not only the life of the bowl but also improves the performance drastically. A gravity chute with a sensor in the same was is provided as an optional accessory for conveying the cashews from the bowl feeder to the next operation. Once, the chute gets full of cashews, the vibrator is automatically switched off and switched on again once the chute becomes part empty. The tooling as well as the chute is made in stainless steel.
4. May 2012 12:51
While designing a bowl feeder, deciding upon the track width of the bowl is very important for the proper orientation and speed of the components. If the track is too wide with respect to the component size, then all the components would come up widthwise while in case the track width is too less, most of the components would fall off the track, back into the bowl. Hence, the track width is most important in cases where the orientation is critical and secondly where the speed or feed rate required is high. Further, in case the track width is too large, the bowl (especially in case of step or cascade bowls), would become too big and won’t function properly. While in case of cylindrical bowls, in case of large track width, the loading space for the parts reduces, increasing the jamming of components, which is the hall mark of cylindrical bowls. Hence, a proper balance has to be stuck between the two, depending upon the component size. Quite a lot of small and new bowl feeder manufacturers do not understand the importance of having the correct track width and this does result in a lot of problems in their bowl feeders like wrong orientation or reduced feed rates. Further many small bowl feeder manufacturers have standard bowls with standard track widths which they use for all applications, irrespective of the component dimensions. This reduces their cost and time, but results in the customer suffering with lower feed rates. Hence, it is always better to purchase bowl feeders from established and reputed companies, which have the correct technology and skills to plan and design a bowl having the correct pitch for a particular component.
22. April 2012 08:54
Feeding of sintered parts presents a very tricky challenge in the case of vibratory feeders. The reason being that these are fragile and even a very small fall from the from the top of the bowl can break them. Due to this reason, a special type of lining / coating is required if these require to be fed in a bowl feeder. The Elscinthane PU coating is most suitable and requires extra thickness. Further the Bowl too is required to be designed in such a manner that the possibility of a fall is reduced if not eliminated. If the components do fall during orientation, the fall is contained by specially designed flaps.
2. April 2012 10:27
Feeding of Conical Washers is not easy in a vibratory bowl feeder due to its very less thickness. In most cases, the thickness is just 0.6 mm to 0.8 mm. Due to its conical curvature, the washers have a tendency of coming in a bunch and it is difficult to remove one out of the bunch. Orientation too is very critical as these washer need to be assembled in the correct orientation. This makes it pertinent to have a bowl feeder that not only feeds correctly oriented parts consistently but also feeds them in a single row, thereby eliminating the chances of double feeding of the washers. A properly designed bowl feeder can feed such conical washers and also eliminate the possibility of their bunching together. Further adding a linear track can result in easy movement of the conical washers and allows them to be picked up easily by a pick and place device by isolating the last washer.
22. March 2012 07:22
Small pressure springs are a tiny but vital part in numerous modern products. In fact, one of the most time consuming techniques is the handling of small components such as springs. Not only are they usually supplied in a tangled mass, from which they need to be freed, but they are also difficult to pick up and fix into position. It is very important that the feeding and location of the springs is extremely accurate during assembly. Vibratory bowl feeders can be used for feeding such springs. However, in case of severe entanglement of the springs, one requires a spring disentangler in addition to a bowl feeder for proper feeding of the springs. The spring disentangle disentangles the springs and loads them into the vibratory bowl feeder. The entangled springs are then recirculated to the spring disentangle. Depending upon the size of the springs, the correct size of the spring disentangle and bowl feeder can be planned. Further, depending upon the requirement, the springs can be fed in 1 or even more outlets (even 4 to 5).
13. March 2012 04:06
A very important usage of vibratory part feeders is for accurately counting of small parts like plastic caps, spouts, screws, rivets, capsules and electrical connectors, bearings, as well as heavy parts such as anchor bolts, bearing races and metal sockets. The standard equipment consists of a suitable vibratory bowl feeder, a sensing device and an electronic reset able counter. The counter can be even upto 10 digits and even more in case of special requirements. Counting speeds can be very high, depending upon the component which requires counting and the accuracy required. Once a preset number is reached, the counting can be made to stop automatically. Restart can be either manually or again automatically on receiving of a Signal. This equipment finds use in various industries, namely, cosmetic, electrical, mechanical, pharmaceutical, optical, bearing and many other industries. Accuracy of counting can be 100%. This is very low cost highly accurate equipment compared to counting by way of weighing.
3. March 2012 08:15
Feeding of half bearings or similar semi-circular parts is not easy and as these parts are very large in size, using a bowl feeder does not make since nor is it economical. Hence, Elscint has developed a unique feeding system for feeding of Half Bearings of various sizes. Half Bearings of upto dia 90 mm or even more can be fed through this system. This equipment consists of an Elscint Vibratory Hopper Feeder, two Elscint Linear Vibratory Feeders and an Elscint Small Parts (Conveyor) Feeder. The speed of operation or the feed rate can be upto 60 pieces per minute in an oriented manner. This Speed can be varied through a potentiometer. Electronic Controls are provided to synchronize the speed of the various components listed above. The Elscint Small Parts (Conveyor) Feeder is used for recirculation of unused parts. A special orientation device is used for orientation of the Half Bearings. Upto 150 Kgs of material can be loaded in the Vibratory Hopper. This makes the system totally manless and the operator can be utilized to do some other work. This system has been found beneficial to various Half Bearing Manufacturers all over the world. It has helped improve productivity by almost 100%.
28. February 2012 03:04
One innovative use of vibratory bowl feeders is to use them for automating riveting machines. Here the rivets are fed through a vibratory bowl feeder to the riveting station. The other part (spring, strip etc.) can either be placed manually or automatically from another vibratory bowl feeder. Alternatively, the strip can be fed through a de-reeler and cut as per the requirement and fed automatically. At the riveting point, the riveting takes place and the completed riveted assembly is blow out or removed manually as the case might be. For this a riveting machine has to be mounted on a specially designed platform. Other options which are possible are checking of the spring / strip etc. before riveting, counting of the number of pieces riveted, automatic stoppage of machine when a wrong rivet / spring is fed etc. This type of automation can be used in various industries like switchgear and contactor manufacturing industry. Productivity increases tremendously with the usage of this type of automation. Not only does it eliminate / reduce labour but also the production as well as consistency of the component is increased tremendously.
11. February 2012 08:39
Elscint Automation has developed a innovative Rotary Feeder for feeding of coins. Various Coins having different thickness and diameters can be fed through the same Rotary Feeder with slight changeover tooling. The Rotary Feeder has a rugged design and is made in cast iron and lined with suitable material for better rigidity. An AC geared motor of Elscint make having variable speed is used. This helps adjust the feeding speed according to the actual requirement of the user. The advantage in case of a rotary feeder as against a vibratory parts feeder is that rotary feeders work at much higher speeds and thus a better feed rate can be achieved. Other parts that can be fed through a rotary feeder are bottle caps, cylindrical rollers, needle rollers etc.