13. October 2014 05:43
Elscint recently completed an assignment wherein the requirement was to feed 40 types of components of various dimensions. The parts being carbide inserts, which, though small were very heavy. They required orientation and additionally, some inserts were having diameter more than length, some having diameter equal to length and some length more than diameter. Hence, Elscint provided a total of 4 bowls with changeover tooling for each of these. In most cases, the lot sizes were small and hence, a small bowl feeder (Model 250 with bowl diameter of around 400 mm) was used. This made bowl as well as tooling replacement very easy. The lot sizes in most cases too were less and this made the small bowl convenient. For higher lot sizes, Elscint provided a 50 ltr. Hopper feeder which could accommodate the larger quantity. Further, having a hopper feeder ensured that the bowl feeder was always having only a certain number of components, so that the load on the vibrator was constant in all cases, providing a constant feed. Elscint also provided a linear vibrator with tubes to accommodate different sizes of components for further feeding to the centreless grinding machine. This provided a constant pressure and push to the parts when they entered the grinding machine. The bowl was coated with Elscinthane PU coating, ensuring that the noise level was less by eliminating the metal to metal contact between the stainless steel bowl and the carbide inserts.
3. October 2014 11:26
Elscint recently manufactured a vibratory bowl feeder where very small rivets were required in two rows in head up orientation. The usual tendency of such rivets is to come in head down orientation. None of them come in the required orientation of head up. Hence, Elscint first ensured head down orientation and then used a sector type track to turn them upside down, ensuring that the final orientation of head up was achieved. Further, as there were two outlets, proper overflow was needed to be ensured on each of the outlets. The bowl was a double start bowl which was completely machined. The sector and linear track too was machined with high accuracy and a polycarbonate see through cover was provided for the linear track. Speed of 100 rivets per minute per row was achieved which was more than the requirement of the customer
24. September 2014 03:49
Elscint recently manufactured a vibratory bowl feeding system for feeding grading and blow feeding of hex bolts of the size M8 x 39 mm having a flange. The diameter of the flange was to be checked. In case of oversize or undersize flange, the bolt had to be rejected and only the correct size of bolts had to be blow fed through two separate tubes to two separate stations 5 meters away. Elscint used Model 400 vibratory bowl feeder with a cast aluminium bowl with Elscinthane coating which has a loading capacity of 30 kgs for feeding of the bolts. Thereafter, segregation of the bolts with respect to the undersize and oversize flange was done by using two counter rotating rollers. These rollers ensured that the undersized and oversize bolts fell into separate bins earmarked for the same. The correct size of bolts were then singulated and blow fed through proper flexible tubes to the required stations (two numbers). For this pneumatic cylinders were used with a fixture which ensured that each of the stations was fed on receipt of the required signal from the end of the customer. The whole equipment was mounted on a table as per the requirement of the customer. The complete electrical and pneumatic system was manufactured by Elscint and supplied to the customer. Even commissioning of the equipment was undertaken at the customer’s end.
13. September 2014 09:40
Elscint recently manufactured three bowl feeders for feeding of valve seats and valve guides. There were two valve seats, both having a diameter of dia 44 mm with the thickness of one being 5 mm and another 6 mm. Both required orientation with respect to one face. The difference was that the internal diameter had an inside 0.5 mm chamfer. Elscint could orient them as per the customer’s requirement. Elscint also made a poka yoke provision in each of the bowls which ensure that in case of loading of the valve seats in the wrong bowl, the same were rejected and taken out from the bowl itself. Thereafter, the valve seats were checked with the help of a pneumatic tool which checked not only whether the orientation was correct but also in case the other valve seat came forward. The rejection was done with the help of a three stage Festo make pneumatic cylinder. Thereafter, the valve seats were pneumatically pushed up four metres in height and then rolled down four metres in one direction to take them to the loading position. This ensured that the feeding system could be kept 4 metres away from the loading station. Thereafter, eight valve seats were kept ready for dispensing in the moving magazine of the customers handling system. The third component to be fed in this system was valve guide. Twenty four of these were required. The size of the valve guide was dia 8 mm x 47.5 mm length. These did not have any particular orientation so they were fed axially from the bowl feeder, pneumatically pushed up 6 metres with a Festo make cylinder and then taken forward 5 metres. At the end of the tube, a fixture was manufactured to ensure that the axially oriented valve guides were converted into rolling orientation and then a single valve guide was singulated and released into the moving magazine of the handler. The total equipment used 3 numbers of Model 400 bowl feeders with cast aluminium bowls with Elscinthane PU coating. Elscint proved the working of this equipment at its factory and then installed and commissioned the equipment at the customer’s site.
3. September 2014 06:58
Elscint recently manufactured a bowl feeder for feeding of cellphone charging pins. The requirement was not only to feed the pins through a vibratory bowl feeder but also to singulate them and keep them ready for pickup by a robot at a centre distance of 60 mm in lengthwise manner. Elscint used a Model 250 EV vibratory bowl feeder with a cast aluminium bowl with Elscinthane coating. The tooling was made in stainless steel. The bowl had a capacity of storing approximate 2500 pins and a linear vibrator with 400 mm long track. Thereafter, two pneumatic slides were used to ensure that the gap between two parts was exactly 60 mm. Proper sensors and reed switches were used to ensure this. The cycle time achieved was 15 x 2 parts per lift, which was more than the requirement of the customer. SMC make pneumatics were used as specified by the customer. The complete system was given on a stand which had an adjustment of (+/-) 100 mm as per the requirement of the customer. Additionally a level control with a tower lamp indicator was provided to ensure that the operator gets to know once the bowl is getting empty. Additionally Frequency Controllers were provided for both the bowl feeder as well as the linear vibrator as the customer’s factory is situated in a place where the power situation is bad and hence regular use of diesel genset is a must. Elscint Frequency Controllers, EFQC3 & EFQC1.5 respectively for the bowl feeder and the linear vibrator ensured that such disruptions do not affect the output and efficiency of the equipment.
29. August 2014 06:33
Elscint recently manufactured a bowl feeder for feeding of brass inserts. In fact, two bowl feeder were manufactured, one for feeding of brass inserts having dia 10.50 x 12.50 mm length and dia 13 x 12 mm length. The brass inserts were conical in shape, making the orientation difficult, especially for the dia 13 x 12 mm one as the length and the minor diameter were the same. However, the innovative tooling designed by Elscint ensured that the orientation was correct and possibility of wrongly oriented components was totally eliminated. Additionally, a linear vibrator was provided to ensure the components were taken ahead with a slot in the track for easy pickup of the components at the end of the track. The customer requested for frequency controllers for the bowl feeder and the linear vibrator as well as feedback control for the vibratory bowl feeder. This too was supplied. There were a total of 3 sets, which were delivered within 4 weeks of receipt of the order. Elscint used its Model 250 bowl feeder with Elscinthane PU coating. The brass inserts being metallic, with the Elscinthane PU coating, the metal to metal contact between the bowl surface and the inserts was avoided, thus reducing the noise considerably. You can watch the video of this bowl feeder for feeding of the small inserts and for the bigger size brass inserts
11. August 2014 03:38
Elscint recently supplied a vibratory bowl feeder for feeding of small plastic tubes having size diameter 20.5 mm x 21 mm length in “rolling” orientation to a customer in Russia. Elscint vibratory bowl feeder Model 400 with a cast aluminium bowl, duly coated with Elscinthane PU coating was used for this application. As the difference between the diameter and the length was marginal, extra care had to be taken to ensure proper orientation. This was especially necessary as the tubes had a lot of “flash” present. However, the robustness of the tooling ensured that the orientation was correct with not a single wrongly oriented plastic tube went forward. Further, a total of two outlets were provided with two gravity track, machined out of stainless steel. Two escapements were mounted at the end of these tracks which could be operated independently. Standard Elscint pneumatic escapements (which are patented) were used. The robust design and excellent build quality of the Elscint escapement assembly coupled with Festo make cylinder ensured that the escapement operates without any stoppage and jamming. You can watch the video of this bowl feeder for feeding of the plastic tubes
2. August 2014 08:10
Elscint manufactures an Auto Loading System for feeding of long length shafts for centreless grinding machines. Shafts having length from 90 mm upto 600 metre. These Shafts being of longer length, they cannot be fed from a vibratory bowl feeder. Feeding such a variety of shafts of various lengths and diameters in a vibratory bowl feeder also requires a lot of changeover tooling which increases the changeover time, making it unfeasible. Hence, keeping view of these problems, Elscint has developed the long length shaft Auto Loading System. The equipment consists of a pneumatic lifter unit and a belt conveyor for further feeding of the shafts to the grinding machine. The shafts have to be aligned and kept on an inclined table, from where a pneumatic cylinder singles out and feeds the shafts to a belt conveyor which further feeds the shafts to the centreless grinding machine. Proper synchronizing sensors ensure that the equipment works without any manual intervention. Options available include, firstly an X-Y adjustment of (+/-) 50 mm on either side, which is especially useful for wheel dressing. Height adjustmen too can be provided to ensure that the feeding system is compatible for shafts of various diameters. Another option which can be opted for is the variable speed for the belt conveyor. You can watch the video of the Auto-Loading System for longer length shafts for Centreless Grinding Machines.
28. July 2014 04:22
Elscint has developed a special type of bowl for feeding of “O” Rings of various sizes with very less changeover. “O” Rings having diameter from dia 5 mm to 60 mm and thickness from 0.8 mm to 5 mm can be fed in bowl. A special type of conical bowl is used for this wherein the “O” Rings are fed in bulk. The special design of the bowl ensures that even though the “O” Rings travel in bulk, they are segregated and singled out at the top of the bowl. This ensures that at the outlet position, only a single row of “O” Rings comes out. A special window makes “overflow” of the “O” Rings possible. This eliminates the possibility of any jamming of the “O” Rings while they flow from the bowl to the gravity or the linear track ahead. In a recently supplied bowl feeder for similar “O” Rings, which was supplied o Switzerland, Elscint additionally provided a gravity track with an pneumatic escapement mechanism to singulate and dispense a single “O” Ring at a time. The track was made of tool steel, hardened and ground and then nickel plated. In another bowl feeder for “O” Rings, also supplied recently, where the end customer was in Italy, a small horizontal linear track was provided with a non-vibrating portion at the end of the track for the part pick up by a pick and place unit. You can watch the video of this bowl feeder for feeding of the small "O" Rings and for the bigger size "O" Rings.
12. July 2014 06:49
Elscint recently supplied a special vibratory bowl feeder for stacking of metal parts having dimensions 25 mm x 27 mm x 4 mm thickness. There was a chamfer on one side which needed to be always on one side, making the orientation complicated. Elscint used a Model 400 double start conical bowl for this purpose. The parts were oriented and fed into a gravity chute and thereafter, they were stacked by pushing them onto a 500 mm long track with a pneumatic cylinder. Elscint provided sensors at various positions to ensure proper synchronization. The equipment was meant to work on 110 V/ 60 Hz input supply as it was exported to the USA. The speed required was high and hence Elscint fabricated a double start bowl and then converged both the tracks into a single one giving a single output with high speed. The position of the final stack was also different from the way the parts were oriented in the bowl and hence the part orientation was changed in the bowl before they moved onto the gravity track. The bowl was coated with Elscinthane PU coating for two reasons, firstly to reduce the noise level by eliminating the metal to metal contact between the bowl and the components and secondly, to ensure that the plating on the parts does not get damaged due to constant movement on the surface of the bowl. Elscint used Model 400 HD vibratory drive with a stainless steel conical design double start bowl for this application. Further a Frequency Controller was provided to ensure that any change in input frequency or voltage does not affect the output. You can watch the video of this bowl feeder for stacking of the metal parts