Automatic processing equipment and processing technology for PE core paper interlayer of aluminum-plastic panel
Technical Field
The invention relates to the field of aluminum-plastic panel production processes, in particular to automatic processing equipment and a processing process for a PE core paper interlayer of an aluminum-plastic panel.
Background
The aluminum-plastic panel is a new building decoration material developed in recent years, and has the characteristics of light weight, high strength, beautiful appearance, water resistance, fire resistance, strong weather resistance, easy processing and the like, and the aluminum-plastic panel mainly comprises three main production lines of formation, coating and compounding, trimming and packaging to form a complete production system, wherein, a PE core paper interlayer is required to be subjected to honeycomb punching treatment when the aluminum-plastic panel is compounded, the honeycomb core paper not only ensures that a plate block is more stable, is anti-bending and anti-compression, but also is divided into a plurality of closed cells in the honeycomb PE core paper, thereby preventing air flow, greatly blocking heat and sound waves and playing the effects of heat insulation, heat preservation and sound insulation, however, the existing PE core paper is required to be subjected to honeycomb punching before being bonded with two coated aluminum plates, and the requirements on hole spacing and punching specification are different when the holes are punched, personnel need to change corresponding mould and punch to PE core paper, are difficult for punching a hole to PE completely during the mould punching press, probably remain the junction between waste material and the periphery of punching a hole, and the process is loaded down with trivial details complicacy, and the time spent is long, intensity of labour is big and inefficiency.
Disclosure of Invention
In order to solve the problems, the invention provides automatic processing equipment and a processing technology of an aluminum-plastic panel PE core paper interlayer, which can solve the problems that the prior PE core paper needs to be subjected to honeycomb punching before being bonded with two coated aluminum plates, and when punching is carried out, personnel need to replace a corresponding die to punch holes on the PE core paper due to different requirements on hole spacing and punching specifications, the PE is not easy to be completely punched when the die is used for punching, a joint possibly remains between punching waste and the periphery, the process is complicated, the consumed time is long, the labor intensity is high, the efficiency is low and the like.
In order to achieve the purpose, the invention adopts the following technical scheme: the utility model provides an aluminium-plastic panel PE core paper intermediate layer automatic processing equipment, includes equidistant adjustment mechanism, screens mechanism and six shutdown mechanism, equidistant adjustment mechanism's lower extreme install screens mechanism, six shutdown mechanism are evenly installed to screens mechanism's lower extreme.
The equidistant adjusting mechanism comprises a connecting frame, two top frames, a connecting plate, a connecting electric slider, a sliding frame, a telescopic plate, clamping stable branched chains, a stable frame, an adjusting cylinder, a straight plate, a matching chute, a matching slider, a spacing plate, a connecting spring, a telescopic rod, two limiting frames and rollers, wherein the two top frames are arranged at the left end and the right end of the connecting frame, the connecting plate is arranged between the two top frames, the connecting plate is provided with the connecting electric slider, the sliding frame is arranged on the connecting electric slider, the clamping mechanism is arranged at the lower end of the sliding frame, the telescopic rods are symmetrically arranged on the sliding frame, the top ends of the telescopic rods are arranged on the limiting frames, the rollers are arranged between the inner walls of the limiting frames through bearings, the rear end of the connecting frame is provided with an inlet-outlet groove, the clamping stable branched chains are uniformly arranged on the side wall of the front end of the connecting frame, the middle parts of, the rear end of the connecting frame is symmetrically provided with a stable frame, the stable frame is provided with an adjusting cylinder, the adjusting cylinder is positioned in the inlet and outlet groove, the top end of the adjusting cylinder is arranged on a straight plate, the front end of the straight plate is provided with a matching sliding groove, the matching sliding groove is connected with a matching sliding block in a sliding matching mode, the matching sliding block is arranged at the rear end of a spacing plate, the spacing plate is positioned between two adjacent clamping stable branched chains, the spacing plate is positioned above a telescopic plate, when the device works, the adjusting cylinder drives the spacing plate to extend and retract according to working requirements, the two adjacent clamping stable branched chains are subjected to spacing adjustment through position adjustment of the spacing plate, the spacing plate is subjected to transverse movement under the assistance of the matching sliding groove and the matching sliding block in the spacing adjustment process, after the spacing adjustment is completed, the electric sliding block drives the sliding frame to perform transverse movement until the two limiting frames are clamped into the clamping stable branched chains, and the spacing adjustment, the operation is simple, the consumption is short, the labor intensity is reduced, and the working efficiency is improved.
The distance plate is of a triangular structure, the distance plate can be conveniently inserted between the two clamping and stabilizing branched chains, and the special structure of the distance plate has the effect of adjusting the distance between the two adjacent clamping and stabilizing branched chains.
The clamping and stabilizing branch chain comprises a side sliding groove, a sliding rod, a U-shaped inserting frame, two auxiliary frames, two inserting cylinders and two inserting plates, wherein the side sliding groove is arranged on the side wall of the connecting frame and is connected with the sliding rod in a sliding fit manner, the sliding rod is arranged at the upper end of the U-shaped inserting frame, two inserting grooves are formed in the left end and the right end of the U-shaped inserting frame, the two auxiliary frames are arranged on the U-shaped inserting frame, the inserting cylinders are arranged on the auxiliary frames, the top ends of the inserting cylinders are arranged on the inserting plates and correspond to the inserting grooves, in the specific working process, an electric slider on an equal-interval adjusting mechanism drives a sliding frame to move transversely until two limiting frames are clamped into the two inserting grooves, a clamping mechanism is matched with six cutting mechanisms to punch the current position of the PE core paper, after punching is finished, the two inserting cylinders drive the two inserting plates to eject the idler wheels out of the two inserting grooves, the electric slider drives the clamping, the clamping and stabilizing branched chain has a clamping effect on the two limiting frames, so that the clamping mechanism can work stably at the current position.
As a preferred technical scheme of the invention, the clamping mechanism comprises a main motor, an auxiliary plate, a cutting cylinder, a connecting plate, an operating cylinder and an operating plate, wherein the main motor is arranged on a sliding frame, the auxiliary plate is arranged on an output shaft of the main motor, the cutting cylinder is symmetrically arranged at the lower end of the auxiliary plate, the top end of the cutting cylinder is arranged on the connecting plate, the operating cylinder is arranged in the middle of the connecting plate, the top end of the operating cylinder is arranged on the operating plate through a flange, when the clamping mechanism works specifically, the main motor drives six cutting mechanisms to rotate to a proper angle, the operating cylinder and the six cutting mechanisms are adjusted into hexagons with corresponding specifications according to working requirements, the cutting cylinder drives the six cutting mechanisms to punch PE core paper, the specifications of the clamping mechanism and the six cutting mechanisms are adjusted to ensure that punched holes meet the working requirements, the clamping mechanism is simple to operate, consumes short, reduces labor intensity, the working efficiency is improved.
As a preferred technical scheme of the invention, the connecting plate is of a regular hexagon structure, so that the working efficiency is improved.
As a preferred technical scheme of the invention, the cutting mechanism comprises a connecting frame, a reset spring, an adjusting plate, an auxiliary sliding block, an auxiliary sliding groove, a top plate, an inserting motor, a gear, two racks, two opposite inserting blocks, two inserting sliding grooves, a push rod, a push wheel and a cutting branch chain, wherein the connecting frame is arranged on the connecting plate, the left end and the right end of the connecting frame are uniformly provided with inserting holes, the side wall of the connecting frame is provided with the auxiliary sliding groove, the auxiliary sliding groove is connected with the auxiliary sliding block in a sliding fit manner, the auxiliary sliding block is arranged on the adjusting plate, the reset spring is connected between the adjusting plate and the connecting frame, the back side of the upper end of the adjusting plate is provided with the top plate, the middle part of the upper end of the adjusting plate is provided with the inserting motor, the output shaft of the inserting motor is provided with the gear, the gear is engaged with the two racks, the, the plug-in block corresponds with the jack in opposite directions, the front end of regulating plate is installed and is cut off the branch chain, there is the push rod through hinged joint on the lateral wall of operation panel, the lower extreme of push rod installs the push wheel through the bearing, when concrete work, according to the operating requirement, the last operation cylinder of screens mechanism drives the push rod and descends, the push rod drives the regulating plate and outwards stretches out corresponding position, the plug-in motor drives gear revolve, the gear drives two plug-in blocks in opposite directions and inserts in the jack, two plug-in blocks in opposite directions carry on spacingly to the regulating plate, six shutdown mechanism drive descend, six shut off the branch chain and cut off the hole to PE core paper, screens mechanism and six shutdown mechanism cooperate and carry out to the hole specification of hole to the regulation and ensure that the hole of beating accords with the operating requirement, and is easy to operate, consume.
As a preferred technical scheme of the invention, the cutting branched chain comprises a cutter, two auxiliary cylinders and two sliding knives, wherein the cutter is arranged at the front end of an adjusting plate, the two auxiliary cylinders are arranged on the inner wall of the cutter, the top ends of the auxiliary cylinders are arranged on the sliding knives through flanges, the two sliding knives are symmetrically arranged, when the cutting device works specifically, the cutter cuts the current PE core paper, the two auxiliary cylinders drive the two sliding knives to move oppositely, the two sliding knives cut the PE core paper, the six cutting branched chains work simultaneously to ensure that the sliding knives between the adjacent cutting branched chains are in mutual contact, the cutting branched chains are cut according to the working requirement, and the six cutting branched chains work simultaneously to ensure that a completely cut honeycomb hole can be punched.
In addition, the invention also provides a processing technology of the automatic processing equipment for the PE core paper interlayer of the aluminum-plastic panel, which is characterized by comprising the following steps:
firstly, adjusting the transverse spacing of hole sites: according to the work requirement, adjusting cylinder drives the space plate to stretch out and draw back, the position adjustment of two adjacent card steady branch chains through the space plate carries out the interval regulation, in the interval regulation process, the space plate carries out lateral motion under the assistance of cooperation spout and cooperation slider, after the interval regulation is accomplished, even electronic slider drives the balladeur train and carries out lateral motion until two spacing card blocks into the card steady branch chain, afterwards, card steady branch chain begins work, even electronic slider on the equidistant adjustment mechanism drives the balladeur train and carries out lateral motion until two spacing card blocks into two slots.
Secondly, punching the PE core paper: the main motor drives the six cutting mechanisms to rotate to a proper angle, the operation cylinder and the six cutting mechanisms are adjusted into hexagons with corresponding specifications according to working requirements, the cutting cylinder drives the six cutting mechanisms to punch holes on the PE core paper, and then the cutting mechanisms start to work, according to the working requirement, an operating cylinder on the clamping mechanism drives a push rod to descend, the push rod drives an adjusting plate to extend outwards to a corresponding position, an inserting motor drives a gear to rotate, the gear drives two opposite inserting blocks to be inserted into the inserting hole, the two opposite inserting blocks limit the adjusting plate, the clamping mechanism drives six cutting mechanisms to descend, the six cutting branch chains cut and punch the PE core paper, and then, the cutting branched chains start to work, the cutter cuts off the current PE core paper, the two auxiliary cylinders drive the two sliding knives to move oppositely, the two sliding knives cut off the PE core paper, and the six cutting branched chains work simultaneously to ensure that the sliding knives between the adjacent cutting branched chains are in mutual contact.
And thirdly, moving to the next vacant position: after the punching is finished, the two inserting cylinders drive the two inserting plates to eject the idler wheels out of the two inserting slots, and the electric slide block drives the clamping mechanism and the six cutting mechanisms to move to the next punching position.
The invention has the beneficial effects that:
1. the invention can solve the problems that the prior PE core paper needs to be subjected to honeycomb punching before being bonded with two coated aluminum plates, when punching is carried out, because the requirements on the hole spacing and the punching specification are different, personnel need to replace a corresponding die to punch the PE core paper, the PE is not easy to be completely punched when the die is punched, a joint possibly remains between punching waste and the periphery, the process is complicated, the consumed time is long, the labor intensity is high, the efficiency is low and the like, the function of automatically punching the PE core paper can be realized, automatic punching and complete punching are realized, no joint is left, the hole spacing and the punching specification are adjusted according to the working requirements, the consumed time is short, and the invention has the advantages of simple operation, low labor intensity, high working efficiency and the like;
2. the invention is provided with the equal-spacing adjusting mechanism, the equal-spacing adjusting mechanism adjusts the spacing between the adjacent holes according to the working requirement, the operation is simple, the consumption is short, the labor intensity is reduced, and the working efficiency is improved;
3. the hole drilling machine is provided with the clamping mechanism, the clamping mechanism is matched with the six cutting mechanisms to adjust the specifications of the holes, so that the drilled holes are ensured to meet the working requirements, the operation is simple, the consumption is short, the labor intensity is reduced, and the working efficiency is improved;
4. the cutting mechanism is arranged, the clamping mechanism is matched with the six cutting mechanisms to adjust the specification of the hole, the punched hole is ensured to meet the working requirement, the six cutting mechanisms completely cut the PE core paper without leaving a connecting part, the operation is simple, the consumption is short, the labor intensity is reduced, and the working efficiency is improved.
Drawings
The invention is further illustrated with reference to the following figures and examples.
FIG. 1 is a schematic structural view of the present invention;
FIG. 2 is a schematic view of a first construction of the equidistant adjustment mechanism of the present invention;
FIG. 3 is a second schematic view of the equidistant adjustment mechanism of the present invention;
FIG. 4 is a schematic structural view of the locking mechanism and the cutting mechanism of the present invention;
fig. 5 is an enlarged view of the invention in fig. 4 taken along line X.
Detailed Description
In order to make the technical means, the creation characteristics, the achievement purposes and the effects of the invention easy to understand, the invention is further explained below by combining the specific drawings. It should be noted that the embodiments and features of the embodiments in the present application may be combined with each other without conflict.
As shown in fig. 1 to 5, an automatic processing device for a PE core paper interlayer of an aluminum-plastic panel comprises an equal-distance adjusting mechanism 41, a blocking mechanism 43 and six cutting mechanisms 44, wherein the blocking mechanism 43 is installed at the lower end of the equal-distance adjusting mechanism 41, and the six cutting mechanisms 44 are evenly installed at the lower end of the blocking mechanism 43.
The equal-spacing adjusting mechanism 41 comprises a connecting frame 411, two top frames 412, a connecting plate 413, an electric sliding block 414, a sliding frame 415, a telescopic plate 427, a clamping stable branched chain 416, a stable frame 417, an adjusting cylinder 418, a straight plate 419, a matching sliding chute 420, a matching sliding block 421, a spacing plate 422, a connecting spring 423, a telescopic rod 424, two limiting frames 425 and a roller 426, wherein the two top frames 412 are installed at the left end and the right end of the connecting frame 411, the connecting plate 413 is installed between the two top frames 412, the electric sliding block 414 is installed on the connecting plate 413, the sliding frame 415 is arranged on the electric sliding block 414, the clamping mechanism 43 is installed at the lower end of the sliding frame 415, the telescopic rods 424 are symmetrically installed on the sliding frame 415, the top end of the telescopic rod 424 is installed on the limiting frames 425, the roller 426 is installed between the inner walls of the limiting frames 425 through a bearing, the rear end of the connecting frame 411 is provided with an inlet-, the middle parts of two adjacent clamping stable branched chains 416 are connected with a connecting spring 423, the front end and the rear end of the two adjacent clamping stable branched chains 416 are connected with a telescopic plate 427, the rear end of the connecting frame 411 is symmetrically provided with a stable frame 417, the stable frame 417 is provided with an adjusting cylinder 418, the adjusting cylinder 418 is positioned in the inlet and outlet groove, the top end of the adjusting cylinder 418 is arranged on a straight plate 419, the front end of the straight plate 419 is provided with a matching sliding groove 420, the matching sliding groove 420 is connected with a matching sliding block 421 in a sliding matching way, the matching sliding block 421 is arranged at the rear end of a spacing plate 422, the spacing plate 422 is positioned between the two adjacent clamping stable branched chains 416, the spacing plate 422 is positioned above the telescopic plate 427, during specific work, the adjusting cylinder 418 drives the spacing plate 422 to stretch and retract according to the work requirement, the two adjacent clamping stable branched chains 416 perform spacing adjustment through the position adjustment of the spacing plate 422, during the spacing adjustment, the spacing plate 422 performs transverse movement, after the distance adjustment is completed, the electric sliding block 414 drives the sliding frame 415 to move transversely until the two limiting frames 425 are clamped into the clamping stable branched chain 416, and the equal distance adjusting mechanism 41 adjusts the distance between the adjacent holes according to the working requirement, so that the operation is simple, the consumption is short, the labor intensity is reduced, and the working efficiency is improved.
The distance plate 422 is of a triangular structure, so that the distance plate 422 can be conveniently inserted between the two clamping and stabilizing branch chains 416, and the special structure of the distance plate 422 has the effect of adjusting the distance between the two adjacent clamping and stabilizing branch chains 416.
The clamping stable branch chain 416 comprises a side sliding groove 4161, a sliding rod 4162, a U-shaped inserting frame 4163, two auxiliary frames 4164, two inserting cylinders 4165 and two inserting plates 4166, the side sliding groove 4161 is arranged on the side wall of the connecting frame 411, the side sliding groove 4161 is connected with the sliding rod 4162 in a sliding fit mode, the sliding rod 4162 is arranged at the upper end of the U-shaped inserting frame 4163, two inserting grooves are formed in the left end and the right end of the U-shaped inserting frame 4163, the U-shaped inserting frame 4163 is provided with the two auxiliary frames 4164, the auxiliary frames 4164 are provided with the inserting cylinders 4165, the top ends of the inserting cylinders 4165 are arranged on the inserting plates 4166, the inserting plates 4166 correspond to the inserting grooves, in the specific work, the electric sliding block 414 on the equal-interval adjusting mechanism 41 drives the sliding frame 415 to move transversely until the two limiting frames 425 are clamped into the two inserting grooves, the clamping mechanism 43 is matched with the six cutting mechanisms 44 to punch holes in the current positions of the PE core paper, after the holes are punched, the two inserting, the electric slider 414 drives the blocking mechanism 43 and the six cutting mechanisms 44 to move to the next punching position, and the blocking stabilizing branch chain 416 has a buckling effect on the two limiting frames 425 to ensure that the blocking mechanism 43 can work stably at the current position.
The clamping mechanism 43 comprises a main motor 431, an auxiliary plate 432, a cutting cylinder 433, a connecting plate 434, an operating cylinder 435 and an operating plate 436, wherein the main motor 431 is arranged on the carriage 415, the auxiliary plate 432 is arranged on an output shaft of the main motor 431, the cutting cylinder 433 is symmetrically arranged at the lower end of the auxiliary plate 432, the top end of the cutting cylinder 433 is arranged on the connecting plate 434, the operating cylinder 435 is arranged in the middle of the connecting plate 434, the top end of the operating cylinder 435 is arranged on the operating plate 436 through a flange, during specific work, the main motor 431 drives six cutting mechanisms 44 to rotate to proper angles, the operating cylinder 435 and the six cutting mechanisms 44 are adjusted to be hexagons with corresponding specifications according to work requirements, the cutting cylinder 433 drives the six cutting mechanisms 44 to punch holes on PE core paper, the specifications of the clamping mechanism 43 and the six cutting mechanisms 44 which are matched with each other are adjusted to ensure that the punched holes meet the work requirements, the consumption is short, the labor intensity is reduced, and the working efficiency is improved.
The connecting plate 434 is of a regular hexagon structure, so that the working efficiency is improved.
The cutting mechanism 44 comprises a connecting frame 441, a return spring 442, an adjusting plate 443, an auxiliary sliding block 444, an auxiliary sliding groove 445, a top plate 446, a plug-in motor 447, a gear 448, two racks 449, two opposite plug-in blocks 450, two plug-in sliding grooves 451, a push rod 452, a push wheel 453 and a cutting branched chain 454, wherein the connecting frame 441 is installed on the connecting plate 434, the left end and the right end of the connecting frame 441 are uniformly provided with inserting holes, the side wall of the connecting frame 441 is provided with the auxiliary sliding groove 445, the auxiliary sliding groove 445 is connected with the auxiliary sliding block 444 in a sliding fit manner, the auxiliary sliding block 444 is installed on the adjusting plate 443, the return spring 442 is connected between the adjusting plate 443 and the connecting frame 441, the top plate 446 is installed at the rear side of the upper end of the adjusting plate 443, the plug-in motor 447 is installed at the middle of the upper end of the adjusting plate 443, the gear 448 is installed on the output shaft of the plug-in motor 447, the two, the inserting chute 451 is arranged on the adjusting plate 443, the opposite inserting blocks 450 correspond to the inserting holes, the front end of the adjusting plate 443 is provided with a cutting branch chain 454, the side wall of the operating plate 436 is provided with a push rod 452 through a hinge, the lower end of the push rod 452 is provided with a push wheel 453 through a bearing, when the cutting device works specifically, the operating cylinder 435 on the clamping mechanism 43 drives the push rod 452 to descend, the push rod 452 drives the adjusting plate 443 to extend outwards to a corresponding position, the inserting motor 447 drives the gear 448 to rotate, the gear 448 drives the two opposite inserting blocks 450 to be inserted into the inserting holes, the two opposite inserting blocks 450 limit the adjusting plate 443, the clamping mechanism 43 drives the six cutting mechanisms 44 to descend, the six cutting branch chains 454 cut and punch the PE core paper, the specifications of the clamping mechanism 43 and the six cutting mechanisms 44 are adjusted to ensure that the punched holes meet the working requirements, the operation is simple, the consumption is short, the labor intensity is reduced, and the working efficiency is improved.
The cutting branched chain 454 comprises a cutting knife 4541, two auxiliary air cylinders 4542 and two sliding knives 4543, wherein the cutting knife 4541 is installed at the front end of an adjusting plate 443, the inner wall of the cutting knife 4541 is provided with the two auxiliary air cylinders 4542, the top ends of the auxiliary air cylinders 4542 are installed on the sliding knives 4543 through flanges, and the two sliding knives 4543 are symmetrically arranged.
In addition, the invention also provides a processing technology of the automatic processing equipment for the PE core paper interlayer of the aluminum-plastic panel, which is characterized by comprising the following steps:
firstly, adjusting the transverse spacing of hole sites: according to the working requirement, the adjusting cylinder 418 drives the spacing plate 422 to extend and retract, the distance between two adjacent card stabilizing branched chains 416 is adjusted by adjusting the position of the spacing plate 422, in the process of adjusting the distance, the spacing plate 422 performs transverse movement with the assistance of the matching sliding chute 420 and the matching sliding block 421, after the distance adjustment is completed, the electric sliding block 414 drives the sliding frame 415 to perform transverse movement until the two limiting frames 425 are clamped into the card stabilizing branched chains 416, then, the card stabilizing branched chains 416 start to work, and the electric sliding block 414 on the equal-distance adjusting mechanism 41 drives the sliding frame 415 to perform transverse movement until the two limiting frames 425 are clamped into the two slots.
Secondly, punching the PE core paper: the main motor 431 drives the six cutting mechanisms 44 to rotate to a proper angle, the operation cylinder 435 and the six cutting mechanisms 44 are adjusted to be hexagons with corresponding specifications according to working requirements, the cutting cylinder 433 drives the six cutting mechanisms 44 to punch holes on PE core paper, then, the cutting mechanisms 44 start working, according to the working requirements, the operation cylinder 435 on the clamping mechanism 43 drives the push rod 452 to descend, the push rod 452 drives the adjusting plate 443 to extend outwards to a corresponding position, the inserting motor 447 drives the gear 448 to rotate, the gear 448 drives the two opposite inserting blocks 450 to be inserted into the inserting holes, the two opposite inserting blocks 450 limit the adjusting plate 443, the clamping mechanism 43 drives the six cutting mechanisms 44 to descend, the six cutting branch chains 454 cut and punch the PE core paper, then, the cutting branch chains 454 start working, the cutter 4541 cuts the current PE core paper, the two auxiliary cylinders 4542 drive the two sliding knives 4543 to move oppositely, two sliding knives 4543 cut the PE core paper, and the six cutting branches 454 operate simultaneously to ensure that the sliding knives 4543 between adjacent cutting branches 454 contact each other.
And thirdly, moving to the next vacant position: after the punching is finished, the two inserting cylinders 4165 drive the two inserting plates 4166 to eject the roller 426 out of the two slots, and the electric slide block 414 drives the clamping mechanism 43 and the six cutting mechanisms 44 to move to the next punching position.
The invention realizes the function of automatically punching the PE core paper, solves the problems that the prior PE core paper needs to be subjected to honeycomb punching before being bonded with two coated aluminum plates, and when punching, because the requirements on hole spacing and punching specification are different, personnel need to replace a corresponding die to punch the PE core paper, the PE is not easy to be completely punched when the die is punched, a joint possibly remains between punching waste and the periphery, the process is complicated, the consumed time is long, the labor intensity is high, the efficiency is low and the like, and achieves the aim.
The foregoing illustrates and describes the principles, general features, and advantages of the present invention. It will be understood by those skilled in the art that the present invention is not limited to the embodiments described above, which are given by way of illustration of the principles of the present invention, and that various changes and modifications may be made without departing from the spirit and scope of the invention as defined by the appended claims. The scope of the invention is defined by the appended claims and equivalents thereof.