A kind of quantitative molding machine
This case is divisional application, the denomination of invention of original application are as follows: a kind of metal powder metallurgy automatic charging, molding machine,
The applying date of original application are as follows: 2016-09-07, original application application No. is: 201610805720.4.
Technical field
The present invention relates to technical field of metallurgical equipment, in particular to a kind of metal powder metallurgy automatic charging, molding machine
With quantitative molding machine.
Background technique
In powder metallurgy production, metal powder particle size is generally required at 0.5-20 microns, because theoretically
It says, particle is thinner, and specific surface area is also bigger, skin effect, such as surface-active, adsorption ability, catalytic capability are stronger.
More easy to form and sintering, traditional powder metallurgical technique then generally using the relatively corase meal for being greater than 40 microns, are not able to satisfy table
Face activity is good, the high metallurgical production requirement of adsorption capacity, Cuiization Capability Requirement.
In addition, the control of powder metallurgy feed precision also has very big influence, feed essence to powder metallurgy product quality
Degree affects the size and presentation quality of powder metallurgy product, while having to production efficiency, production cost and production environment
Very big influence.
Powder metallurgy forming is one of the basic working procedure in powder metallurgy production, it is therefore an objective to which loose powder, which is made, to be had
The semifinished or finished goods of prespecified geometric, size, density and intensity;Molding (punching block) molding is used in powder metallurgy production
Most wide forming method;Occur the thermoforming process such as hot-isostatic pressing, hot extrusion, hot forging again later;In powder metallurgy forming
It uses after mixing metal powder, is placed in extrusion die, plasticized powder is made to pass through certain geometrical shape under external force
Extrusion nozzle squeezes out, and becomes the semi-finished product of various tubing, bar and other abnormity, the forming process in powder metallurgy production is to precompressed
Pressure and extrusion speed requirement are stringenter, and current preload pressure is difficult to reach scheduled pressure in a short time, squeeze speed
Degree is slow, directly reduces metal powder shaping efficiency.
How accurate, quickly control powder metallurgy feed precision, and metal powder particle size can be made to reach and wanted
It asks, reaches scheduled pressure in a short time and extrusion speed is the project that the present invention is faced.
Summary of the invention
In order to solve the deficiency of above-mentioned prior art, the object of the present invention is to provide a kind of metal powder metallurgy it is automatic on
Material, molding machine.
Invention thought of the invention is: using for powder metallurgical technique in the production of current powder metallurgy and is greater than 40 microns
Compared with corase meal, it is not able to satisfy good surface activity, the high metallurgical production requirement of adsorption capacity, Cuiization Capability Requirement, powder metallurgy is given
Can not achieve for material precision is not achieved scheduled pressure and extrusion speed and influences metal powder in automatic control and short time
The problem of end molding, the present invention devise a kind of metal powder metallurgy automatic charging, molding machine, a kind of metal powder metallurgy from
Dynamic feeding, molding machine, wherein including rack, disintegrating mechanism, feeding mechanism, Weighing mechanism and limit material leakage mechanism;By metal
Powder pours into metal powder feeding bin from feeding port, and successively by the turntable A through-hole of grinding mechanism, feeding metal powder is leaked
Grinding into grinding track by mill, the metal powder after grinding are transported to the metal of feeding mechanism by material leakage pipe
In powder feeding storehouse, under feeding metal powder is transported in the middle part of the weighing backing plate of Weighing mechanism under the conveying of helical blade
In expects pipe, when determining that the amount of feeding metal powder reaches the weight of the standard setting of metal forming by retransmitting sensor, slow down electricity
Machine B is opened, and carrier wheel moves along clamping rings medial surface, while driving the limited block of driving tie rod end along shell to pedestal
Direction is mobile, and when feed opening is opposite with limit hole, the feeding metal powder in feeder pipe leaks down, the feeding metal powder in feeder pipe
It is last all to fall through into the hollow cylindrical syringe in fixed bin, under being acted on by the elastic-restoring force of reset spring,
By the metal powder in hollow cylindrical syringe by the way that metal powder material leakage channel injection is arranged at fixing mould upper section central
Into hollow cylinder, Driven by Hydraulic Cylinder piston rod is moved up at this time, and low bottom-disc and lower stamping die are detached from support frame, simultaneously
Piston rod drives crushing block to move upwards, and crushing block drives lower stamping die to move upwards together with resilient support members, until
Slot and hollow circuit cylinder mates are squeezed, realize crushing failure at high speed forming process, piston rod moves down, low bottom-disc and lower stamping die
Tool return to home position together, at this time piston rod move again up drive crushing block along mobile bar A, mobile bar B and mandril to
Metal module molding in hollow cylinder is ejected, hollow cylinder is disengaged it from, in the resilient force of pressure spring by upper movement
Under, make resilient support members return, i.e. crushing block is contacted with the rectangle groove bottom of lower stamping die, repeatedly feeding next time
The limit of metal powder, the forming process of accurate, quickly control metal feed precision and metal powder.
A kind of metal powder metallurgy automatic charging, molding machine, wherein including rack, disintegrating mechanism, feeding mechanism claims
Heavy-duty machine structure and limit material leakage mechanism;
The disintegrating mechanism includes the metal powder feeding bin of top setting feeding port, is arranged in the metal powder feeding
Grinding mechanism in storehouse, the grinding mechanism includes drive shaft, is arranged on turntable A, the turntable A on the driving shaft and uniformly sets
Several through-holes are set, upright bar A and upright bar B are set in the bottom surface turntable A of crossing, if equidistantly having respectively on the upright bar A and upright bar B
Dry grinding disk, the grinding track matched with the mill is arranged in the metal powder feeding bin inner wall, on the drive shaft top
It holds coaxial with the motor output shaft above the metal powder feeding bin;
The feeding mechanism includes the material leakage pipe that one end is connected with metal powder feeding bin bottom, the material leakage pipe
The other end connect metal powder feeding storehouse, the shaft that periphery is connected with helical blade is equipped in the metal powder feeding storehouse,
It is arranged in the metal powder feeding storehouse feeding end, the decelerating motor A being connect with described shaft one end, in the metal powder
Passage is arranged in feeding storehouse discharge outlet;
The Weighing mechanism includes the weighing backing plate that middle part offers drain spout, the pad positioned at the weighing backing plate bottom surface
Block, the weighing sensor being fixed on the cushion block are located on the outside of the drain spout, are equipped in the weighing backing plate bottom surface
Lifting cylinder;
The limit material leakage mechanism includes that top is connect with the cylinder base of the lifting cylinder, and blanking is arranged in above and below
The shell of mouth is arranged in and is equipped with the limited block that middle part offers limit hole in the shell, one end and the limited block one end
The return spring of connection, one end are connected to the driving pull rod of described limited block the other end, and it is another to be connected to the driving pull rod
The top of the vertical bar A of one end, the bottom of the vertical bar A are fixedly connected with one end of rocking handle A, and the other end of the rocking handle A passes through
The top surface of vertical bar B connection carrier wheel, the rotary shaft lower end at the carrier wheel center are fixedly connected with one end of rocking handle B, institute
The other end for stating rocking handle B is connected to the output shaft of decelerating motor B, and the decelerating motor B is fixed on the base, on the base
Equipped with clamping rings, the clamping rings medial surface is continuously equipped with the tooth socket being meshed with the carrier wheel;
The shaping mechanism includes support frame, is fixed on hydraulic cylinder on support frame as described above, is connected to the work of the hydraulic cylinder
The fixation on support frame as described above, above the lower stamping die mechanism is arranged in the lower stamping die mechanism on stopper rod top
Mold, and it is placed in the metal powder injection mechanism of the fixing mould or more;
Guide pad is set on the base, notch is offered on the guide pad, accommodates the driving in the notch
Pull rod.
The output shaft of the decelerating motor B is located at the clamping rings center.
The cylinder A and cylinder B of setting conveying metal powder on the material leakage pipe.
The other end of the return spring is connected to the shell one end medial surface.
The lower stamping die mechanism includes that middle part offers the low bottom-disc for accommodating the piston rod, is arranged in the bottom
The lower stamping die of disk upper surface offers the rectangular channel for accommodating resilient support members in the lower section of the lower stamping die;Institute
Stating resilient support members includes the crushing block with the piston rod top end, and the mandril in the middle part of the crushing block is arranged in, and is located at institute
Mandril two sides are stated, the mobile bar A and mobile bar B being connected on the crushing block are circumferentially set in the mobile bar A and mobile bar B
There is pressure spring, hollow cylinder is set at the end face center of the lower stamping die, the mandril is placed in the hollow cylinder
In, the through-hole A for extending through the mobile bar A and mobile bar B is additionally provided in the lower stamping die.The fixing mould top
Face is connected to the top bottom-disc being arranged on support frame as described above, and setting metal powder material leakage is logical at the fixing mould upper section central
Road, lower section setting are connected with metal powder material leakage channel, the extruding slot with the hollow circuit cylinder mates.
The limit hole is equal with the feed opening diameter.
The shell is the cuboid of hollow form, and the limited block is the rectangular block matched with the shell.
The motor is arranged at the top of the metal powder feeding bin.
The other end of the rocking handle A is connected to carrier wheel top surface by vertical bar B, is located on the outside of the rotary shaft.
The drain spout is connected to the passage, is connected under being connected to the feed opening below the drain spout
Expects pipe.
The metal powder injection mechanism includes the hollow cylindrical syringe that top is connected to the feeder pipe, and setting exists
The reset spring of the hollow cylindrical syringe periphery, the fixed bin that the hollow cylindrical syringe is accommodated are described solid
Determine the opening A that the setting of orlop portion is connected to metal powder material leakage channel, the outer diameter of the reset spring is greater than the fixation
The diameter of the opening B of the top of the warehouse.
The present invention use when the course of work are as follows: open motor, motor drive drive shaft quick rotation, by metal powder from
It feeds intake and pours into metal powder feeding bin, successively feeding metal powder, is drained to grinding by the through-hole of the turntable A by grinding mechanism
By the grinding of mill in track, the metal powder after grinding is sent by the metal powder that material leakage pipe is transported to feeding mechanism
In feed bin, cylinder A and cylinder B convey gas into material leakage pipe, start decelerating motor A, quickly will leakage under gas pressure effect
In expects pipe grind after metal powder be transported in metal powder feeding storehouse, by under the conveying of helical blade by feeding metal powder
End is transported in the feeder pipe in the middle part of the weighing backing plate of Weighing mechanism by passage, determines feeding metal powder by retransmitting sensor
When the weight for the standard setting that the weight at end reaches metal forming, decelerating motor B is opened, and carrier wheel is along clamping rings medial surface
It is mobile, while the limited block of driving tie rod end being driven to move along shell to pedestal direction, when feed opening is opposite with limit hole, under
Feeding metal powder in expects pipe leaks down, and the feeding metal powder in feeder pipe all falls through into the hollow circle in fixed bin
In column syringe, by the way that under the elastic-restoring force effect of reset spring, the metal powder in hollow cylindrical syringe is led to
It crosses at fixing mould upper section central and metal powder material leakage channel injection is set into hollow cylinder, open the switch of hydraulic cylinder,
Driven by Hydraulic Cylinder piston rod moves up at this time, and low bottom-disc and lower stamping die are detached from support frame, while piston rod drives and squeezes
Block moves upwards, and crushing block drives lower stamping die to move upwards together with resilient support members, until squeezing slot and hollow circle
Cylinder matches, and realizes crushing failure at high speed forming process, and piston rod moves down, and low bottom-disc returns to original together with lower stamping die
Position, piston rod moves driving crushing block along mobile bar A again up at this time, and mobile bar B and mandril move upwards, by hollow circle
Molding metal module ejection, disengages it from hollow cylinder in cylinder, under the resilient force of pressure spring, makes resilient support member
Part return, i.e. crushing block are contacted with the rectangle groove bottom of lower stamping die, repeatedly the limit of feeding metal powder next time,
Accurately, the feed precision of metal and the forming process of metal powder are quickly controlled.
The beneficial effects of the present invention are: the present invention be used for when powder metallurgy metal powder feeding quickly, whole-course automation control
System, grinds the setting of mechanism, regrinds to the metal powder on first, is transported to Weighing mechanism by feeding mechanism and is counted
Whether amount, control feed precision, limit material leakage mechanism reach the weight of standard setting according to Weighing mechanism to metal powder weight
Value is limited, and metal powder is avoided to lose, can high-efficient homework, reduce cost of labor, it is accurate to reach metal powder feeding
Requirement;Both feeding, weighing are mutually independent device, in this way the vibration that feeding and feeding mechanism generate will not shadow
Ring the weighing accuracy of Weighing mechanism;Limit material leakage mechanism of the invention is engaged by carrier wheel and tooth socket, it is ensured that driving is drawn
The mobile stability of bar is high, and return spring realizes that limited block moves back and forth, high degree of automation, so that the gold that weight is qualified
Belong to powder automatic blanking so that metal powder as needed reach metering, time requirement drains to automatically and needs to inject blanking
In hollow cylindrical syringe, fixing mould and the lower stamping die mutual extrusion of lower stamping die mechanism make metal powder fast
Rapid-result type, the setting of resilient support members is realized to rush by molding metal block ejection hollow cylinder, hydraulic cylinder
Compression mould reaches scheduled pressure and extrusion speed in a short time, facilitates the metal powder by metering qualification continuously shaped,
It is suitable for mass production.
Detailed description of the invention
Fig. 1 is the structural schematic diagram of the embodiment of the present invention.
Fig. 2 is the structural schematic diagram of the embodiment of the present invention.
Fig. 3 is the structural schematic diagram that mechanism is ground in the embodiment of the present invention.
Fig. 4 is the structural schematic diagram of Weighing mechanism in the embodiment of the present invention.
Fig. 5 is the structural schematic diagram that material leakage mechanism is limited in the embodiment of the present invention.
Fig. 6 is the structural schematic diagram that shell is sloughed by limit material leakage mechanism in the embodiment of the present invention.
Fig. 7 is the positional relationship structural representation that carrier wheel and driving pull rod in material leakage mechanism are limited in the embodiment of the present invention
Figure.
Fig. 8 is the structural schematic diagram of shaping mechanism in the embodiment of the present invention.
Fig. 9 is that the positional relationship structure of lower stamping die mechanism and fixing mould is shown in shaping mechanism in the embodiment of the present invention
It is intended to.
Figure 10 is the structural schematic diagram of fixing mould in shaping mechanism in the embodiment of the present invention.
Figure 11 is the positional relationship structure of lower stamping die mechanism and fixing mould in shaping mechanism in the embodiment of the present invention
Schematic diagram.
Figure 12 is the position of hollow cylindrical syringe and reset spring in metal powder injection mechanism in the embodiment of the present invention
Set relational structure schematic diagram.
Wherein, appended drawing reference are as follows: 1, rack;2, disintegrating mechanism;211, feeding port;21, metal powder feeding bin;22, it drives
Moving axis;23, turntable A;25, upright bar A;26, upright bar B;27, mill;28, track is ground;29, motor;3, feeding mechanism;31, it leaks
Expects pipe;32, metal powder feeding storehouse;33, helical blade;34, shaft;35, decelerating motor A;36, passage;311, cylinder A;
312, cylinder B;4, Weighing mechanism;41, drain spout;42, weighing backing plate;43, cushion block;44, weighing sensor;45, lifting cylinder;
5, material leakage mechanism is limited;511, feed opening;51, shell;521, limit hole;52, limited block;53, return spring;54, driving is drawn
Bar;55, vertical bar A;56, rocking handle A;57, vertical bar B;58, carrier wheel;59, rotary shaft;60, rocking handle B;61, decelerating motor B;62,
Pedestal;63, clamping rings;64, tooth socket;65, guide pad;66, notch;67, feeder pipe;6, shaping mechanism;68, support frame;6-
1, hydraulic cylinder;69, fixing mould;70, piston rod;71, metal powder injection mechanism;72, low bottom-disc;73, lower stamping die;
74, resilient support members;75, rectangular channel;741, crushing block;7411, mandril;742, mobile bar A;743, mobile bar B;76, it presses
Spring;77, hollow cylinder;78, through-hole A;79, top bottom-disc;80, metal powder material leakage channel;81, slot is squeezed;82, hollow circuit cylinder
Shape syringe;83, reset spring;84, fixed bin.
Specific embodiment
In order to clearly illustrate the technical characterstic of this programme, below by specific embodiment, this programme is illustrated.
Embodiment 1
Referring to Fig. 1, Fig. 2, Fig. 3, Fig. 4, Fig. 5, Fig. 6, Fig. 7, Fig. 8, Fig. 9, Figure 10, Figure 11 and Figure 12, the present invention is: a kind of
Metal powder metallurgy automatic charging, molding machine, wherein including rack 1, disintegrating mechanism 2, feeding mechanism 3,4 He of Weighing mechanism
Limit material leakage mechanism 5;
Disintegrating mechanism 2 includes the metal powder feeding bin 21 of top setting feeding port 211, is arranged in metal powder feeding bin
Grinding mechanism in 21, grinding mechanism includes drive shaft 22, and the turntable A23 in drive shaft 22 is arranged in, uniformly sets on turntable A23
Several through-holes are set, upright bar A25 and upright bar B26 is set crossing the bottom surface turntable A23, is equidistantly had respectively on upright bar A25 and upright bar B26
The grinding track 28 matched with mill 27 is arranged in 21 inner wall of metal powder feeding bin for several mills 27, pushes up in drive shaft 22
It holds coaxial with 29 output shaft of motor positioned at 21 top of metal powder feeding bin;
Feeding mechanism 3 includes the material leakage pipe 31 that is connected with 21 bottom of metal powder feeding bin of one end, material leakage pipe 31 it is another
One end connects metal powder feeding storehouse 32, and the shaft 34 that periphery is connected with helical blade 33 is equipped in metal powder feeding storehouse 32,
It is arranged in 32 feeding end of metal powder feeding storehouse, the decelerating motor A35 being connect with 34 one end of shaft, in metal powder feeding storehouse
Passage 36 is arranged in 32 discharge outlets;
Weighing mechanism 4 includes the weighing backing plate 42 that middle part offers drain spout 41, the cushion block positioned at weighing 42 bottom surface of backing plate
43, the weighing sensor 44 being fixed on cushion block 43 is located at 41 outside of drain spout, is equipped with lifting in weighing 42 bottom surface of backing plate
Cylinder 45;
Limit material leakage mechanism 5 includes that top is connect with the cylinder base of lifting cylinder 45, and feed opening 511 is arranged in above and below
Shell 51, be arranged in shell 51 and be equipped with middle part and offer the limited block 52 of limit hole 521, one end and 52 one end of limited block
The return spring 53 of connection, one end are connected to the driving pull rod 54 of 52 the other end of limited block, and it is another to be connected to driving pull rod 54
The top of the vertical bar A55 of one end, the bottom of vertical bar A55 are fixedly connected with one end of rocking handle A56, and the other end of rocking handle A56 passes through
The top surface of vertical bar B57 connection carrier wheel 58,59 lower end of rotary shaft at 58 center of carrier wheel are fixedly connected with the one of rocking handle B60
End, the other end of rocking handle B60 are connected to the output shaft of decelerating motor B61, and decelerating motor B61 is fixed on pedestal 62, in pedestal
62 are equipped with clamping rings 63, and 63 medial surface of clamping rings is continuously equipped with the tooth socket 64 being meshed with carrier wheel 58;
Shaping mechanism 6 includes support frame 68, is fixed on hydraulic cylinder 6-1 on support frame 68, is connected to the piston of hydraulic cylinder 6-1
The lower stamping die mechanism on 70 top of bar, is arranged on support frame 68, the fixing mould 69 above lower stamping die mechanism,
And it is placed in the metal powder injection mechanism 71 of 69 or more fixing mould.
Guide pad 65 is set on pedestal 62, notch 66 is offered on guide pad 65, driving pull rod 54 is accommodated in notch 66.
The output shaft of decelerating motor B61 is located at 63 center of clamping rings.
The cylinder A311 and cylinder B312 of setting conveying metal powder on material leakage pipe 31.
The other end of return spring 53 is connected to 51 one end medial surface of shell.
Lower stamping die mechanism includes that middle part offers the low bottom-disc 72 for accommodating piston rod 70, and table is arranged on low bottom-disc 72
The lower stamping die 73 in face offers the rectangular channel 75 for accommodating resilient support members 74 in the lower section of lower stamping die 73;Elasticity
Support component 74 includes the crushing block 741 with 70 top of piston rod, and the mandril 7411 at 741 middle part of crushing block is arranged in, is located at top
7411 two sides of bar, the mobile bar A742 and mobile bar B743 being connected on crushing block 741, in mobile bar A742 and mobile bar B743
It is circumferentially with pressure spring 76, hollow cylinder 77 is set at the end face center of lower stamping die 73, mandril 7411 is placed in hollow circle
In cylinder 77, the through-hole A78 for extending through mobile bar A742 and mobile bar B743 is additionally provided in lower stamping die 73.
69 top surface of fixing mould is connected to the top bottom-disc 79 being arranged on support frame 68, is arranged at fixing mould upper section central
Metal powder material leakage channel 80, lower section setting are connected with metal powder material leakage channel 80, match with hollow cylinder 77
Extruding slot 81.
Limit hole 521 is equal with 511 diameter of feed opening.
Shell 51 is the cuboid of hollow form, and limited block 52 is the rectangular block matched with shell 51.
21 top of metal powder feeding bin is arranged in motor 29.
The other end of rocking handle A56 is connected to 58 top surface of carrier wheel by vertical bar B57, is located at 59 outside of rotary shaft.
Drain spout 41 is connected to passage 36, and the feeder pipe 67 being connected to feed opening 511 is connected with below drain spout 41.
Metal powder injection mechanism 71 includes the hollow cylindrical syringe 82 that top is connected to feeder pipe 67, is arranged in
The reset spring 83 of 82 periphery of hollow round column shape syringe, the fixed bin 84 that hollow cylindrical syringe 82 is accommodated, fixed bin 84
The opening A for being connected to metal powder material leakage channel 80 is arranged in bottom, and the outer diameter of reset spring 83 is greater than opening for 84 top of fixed bin
The diameter of mouth B.
The present invention is in use, open motor 29, and motor 29 drives 22 quick rotation of drive shaft, by metal powder from feeding intake
211 pour into metal powder feeding bin 21, and successively the through-hole of the turntable A23 by grinding mechanism, drains to feeding metal powder
The grinding in track 28 by mill 27 is ground, the metal powder after grinding is transported to feeding mechanism 3 by material leakage pipe 31
Metal powder feeding storehouse 32 in, cylinder A311 and cylinder B312 convey gas into material leakage pipe 31, start decelerating motor A35,
Quickly the metal powder after grinding in material leakage pipe 31 is transported in metal powder feeding storehouse 32 under gas pressure effect, is passed through
Feeding metal powder is transported in the middle part of the weighing backing plate 42 of Weighing mechanism 4 by passage 36 under the conveying of helical blade 33
In feeder pipe 67, determine that the weight of feeding metal powder reaches the weight of the standard setting of metal forming by retransmitting sensor 44
When, decelerating motor B61 is opened, and carrier wheel 58 is moved along 63 medial surface of clamping rings, while driving driving 54 end of pull rod
Limited block 52 is moved along shell 51 to 62 direction of pedestal, when feed opening 511 and limit hole 521 are opposite, the feeding in feeder pipe 67
Metal powder leaks down, and the feeding metal powder in feeder pipe 67 all falls through into the injection of the hollow cylindrical in fixed bin 84
In device 82, by the way that under the elastic-restoring force effect of reset spring 83, the metal powder in hollow cylindrical syringe 82 is passed through
Metal powder material leakage channel 80 is arranged at 69 upper section central of fixing mould to be injected into hollow cylinder 77, opens hydraulic cylinder 6-1
Switch, hydraulic cylinder 6-1 drives piston rod 70 to move up at this time, and low bottom-disc 72 and lower stamping die 73 are detached from support frame 68,
Piston rod 70 drives crushing block 741 to move upwards simultaneously, and crushing block 741 drives lower stamping die with resilient support members 74 together
73 move upwards, and match until squeezing slot 81 with hollow cylinder 77, realize crushing failure at high speed forming process, and piston rod 70 is downward
Mobile, low bottom-disc 72 returns to home position with lower stamping die 73 together, and piston rod 70 moves driving again up and squeezes at this time
Block 741 is moved upwards along mobile bar A742, mobile bar B743 and mandril 7411, by metal module molding in hollow cylinder 77
Ejection, disengages it from hollow cylinder 77, under the resilient force of pressure spring 76, makes 74 return of resilient support members, that is, squeeze
Block 741 is contacted with 75 bottom surface of rectangular channel of lower stamping die 73, repeatedly the limit of feeding metal powder next time, accurate,
Quickly the feed precision of control metal and the forming process of metal powder.
Technical characteristic of the present invention without description can realize that details are not described herein by or using the prior art, certainly,
The above description is not a limitation of the present invention, and the present invention is also not limited to the example above, the ordinary skill of the art
The variations, modifications, additions or substitutions that personnel are made within the essential scope of the present invention, also should belong to the present invention.