A kind of woven bag cuts wrinkle resistant mechanismTechnical field
The invention belongs to knitting cutting apparatus field, relate to a kind of woven bag and cut wrinkle resistant mechanism.
Technical background
In woven bag production process, need, by the continuous print knitting section of cutting into, then to carry out the operation of bag tape edge.Woven bag cuts and generally adopts cutting knife, adopts conveying roller carried towards cutting knife direction by continuous print knitting and make knitting front end cross cutting knife, and the length of crossing cutting knife part when knitting reaches the requirement making bag, uses cutting knife to cut off.In the process of conveying knitting, cutting knife part is provided with the blowing mouth blown forward, and the knitting crossing cutting knife easily upwarps by blowing effect, especially delivery speed is faster, knitting end is also subject to larger advance windage, easily forms fold, affects the yield rate of woven bag.And delivery speed is faster, it is higher that knitting end upwarps by windage the probability forming fold, and the delivery speed of knitting is subject to the above restrictions, and greatly constrains the production efficiency of woven bag.
The CN202097998U patent document of Patent Office of the People's Republic of China's bulletin on January 4th, 2012, name is called the wrinkle resistant structure of woven bag bodies, side, front and back is determined with throughput direction, this device arranges in the front side of cutting knife and send bag wheels, conveying clamp wheels are set on rear side of cutting knife, conveying clamp wheels rotating speed is greater than and send a bag wheels rotating speed, conveying speed discrepancy fast after slow before utilizing, and makes knitting tensioning can not produce fold through cutting knife position.But, there is following defect in this device: 1, the upper and lower clip wheel of conveying clamp wheels sheathed belt respectively, knitting after adopting upper and lower two belt clamping conveyings to cut, the synchronism of two belts own is just difficult to guarantee, and be difficult to be consistent due to two belts tensile force separately, it is flexible that course of conveying can produce in various degree, and above-mentioned reason all can cause knitting can produce fold at belt clamping transport portion; 2, when knitting cuts the transfer of backward tape edge bench board, because knitting to be clamped between two belts and vertical strap throughput direction is pulled, easily fold is produced; 3, after knitting has once cut, how cutting surface is accurately sent between conveying clamp wheels and there is a difficult problem.
Summary of the invention
The object of the invention is to cross for current woven bag cutting machine structure the problem that cutting knife part knitting easily produces fold in course of conveying, a kind of woven bag cutting machine structure that can be anti-fold is provided.
The technical solution adopted for the present invention to solve the technical problems is: a kind of woven bag cuts wrinkle resistant mechanism, comprise and cut platform, cut platform and be provided with cutting knife, the front side of cutting knife is provided with the pair roller of conveying continuous weaving thing, pair roller comprises upper pressure roller and the lower compression roller of synchronous rolling, cutting on platform on rear side of cutting knife has the some wrinkle resistant belts arranged along knitting throughput direction by belt pulley erection, the downside of wrinkle resistant belt is move in the same way with throughput direction and the driving surface that can contact with knitting, the linear velocity of wrinkle resistant belt is more than or equal to the travel line speed of pair roller roll surface.In knitting course of conveying, the major cause forming fold is that end is not pulled tightly, and when causing carrying too fast, knitting end upwards hikes up, if confinement end does not hike up, is then easily formed and rewinds; And fixing depression bar is arranged to knitting end, after easily causing again knitting end to encounter depression bar, delivery speed is less than rear delivery speed, produces fold.On the platform of this programme on rear side of cutting knife, the wrinkle resistant belt constantly moved to throughput direction in bottom surface is set, the kinematic velocity of wrinkle resistant belt bottom surface is made to be more than or equal to the kinematic velocity of conveying rolls, when knitting end hikes up contact belt lower surface, belt can cause one to pull tight power to throughput direction to knitting, be equivalent to pull tight one-piece-woven thing in knitting end to throughput direction, avoid knitting to form fold.Relative to the form only arranging compression column with fixed on rear side of cutting knife, improving productivity more than one times, through actual verification, adopts the production efficiency of depression bar form per minute 30 woven bags, after using wrinkle resistant belt instead, per minute produces woven bag quantity can bring up to more than 60.And this programme it also avoid in background technology, two belt clamping conveyings are adopted to cause the problem of fold in conveying and transfer process; After it also avoid cutting device described in background technology, follow-up knitting is difficult to the problem of alignment two belt clip positions.
As preferably, described wrinkle resistant belt and corresponding belt pulley are arranged in the pressure rack of frame-shaped, the passive rotating shaft that pressure rack front end is provided with and is with the active rotating shaft of some driving pulleys, rear end is provided with the corresponding negative pulley wheel of band, the two ends of each wrinkle resistant belt are set on corresponding driving pulley and negative pulley wheel respectively.
As preferably, the front end of pressure rack is hinged on higher than cutting on the mount pad of platform upper surface, and the rear end of pressure rack is set up and cut the upper surface of platform.Pressure rack can be rotated around hinge-point, digs pressure rack rear end to keep in repair or Job Operations.
As preferably, described active rotating shaft is coaxial with the hinge-point of pressure rack.When pressure rack is rotated, do not affect the position of active rotating shaft.
As preferably, belt-driving is passed through in the described end of upper pressure roller and the end of active rotating shaft.Adopt cog belt to ensure stable transmitting ratio in transmission process, and keep upper pressure roller to have the transmitting ratio being greater than 1 to active rotating shaft, when driving pulley is consistent with the upper pressure roller radius of gyration, wrinkle resistant belt can have the linear velocity being greater than pressure roller conveyor surface.Certainly, as other scheme, also by the coordinate design of transmitting ratio and radius of gyration ratio, the object that wrinkle resistant belt can have the linear velocity being greater than pressure roller conveyor surface can be reached.
As preferably, between the end of described upper pressure roller and the end of active rotating shaft, be also provided with transfer belt pulley set.Transfer belt pulley set comprises two coaxial belt wheels, and the end of one of them belt wheel and upper pressure roller completes transmission, and another belt wheel and active rotating shaft complete transmission.
As preferably, the end of described upper pressure roller and lower compression roller is by the synchronous gear wheels synchrodrive of engagement.Power inputs from the end of lower compression roller, then drives upper pressure roller to rotate by synchronous gear wheels, and realize knitting conveying, wrinkle resistant belt power is obtained from upper pressure roller by belt-driving.
As preferably, described pair roller and wrinkle resistant belt have same propulsion source, and described propulsion source is motor.
As preferably, the platform side that cuts on rear side of described cutting knife is connected with tape edge platform, and tape edge platform throughput direction is vertical with cutting platform throughput direction.
As preferably, described driving surface is downward-sloping from front to back.The number of times that knitting end upwards hikes up can be reduced like this, make the knitting cut lengths of cutting more accurate, improve the quality of product.
The present invention adopts linear velocity to be greater than the wrinkle resistant belt of pair roller delivery speed, effectively prevents knitting from crossing the phenomenon of part at course of conveying fold of cutting knife, improves product design and production efficiency.
Accompanying drawing explanation
Fig. 1 is a kind of structural representation of the present invention.
Fig. 2 is the schematic enlarged-scale view at A place in Fig. 1 of the present invention.
Fig. 3 is the side direction interior views that the present invention cuts platform back segment.
In figure: 1. cut platform, 2. tape edge platform, 3. pressure rack, 4. wrinkle resistant belt, 5. driving pulley, 6. active rotating shaft, 7. cutting knife, 8. pair roller, 9. erecting frame, 10. the first belt pulley, 11. second belt pulleys, 12. the 3rd belt pulleys, 13. transfer belt pulley set, 14. the 4th belt pulleys, 15. negative pulley wheels, 16. synchronous gear wheels.
Detailed description of the invention
Below by specific embodiment, also the present invention is further described by reference to the accompanying drawings.
Embodiment: a kind of woven bag cuts wrinkle resistant mechanism, as shown in Figure 1 and Figure 2.In woven bag production process, the continuous weaving thing of wound into rolls is transported to and cuts platform 1, by cutting knife 7, knitting is cut into scale segment, then enters tape edge platform 2 tape edge.Tape edge platform 2 is connected to the side cutting platform 1 back segment, and tape edge platform 2 is vertical with cutting platform 1 throughput direction.Be provided with pressure rack 3 on rear side of cutting knife 7, pressure rack 3 is framed structure.Pressure rack 3 is provided with three parallel wrinkle resistant belts 4 along throughput direction.
Structure before and after cutting knife 7 as shown in Figure 2 and Figure 3, cutting knife 7 is arranged on the back segment cutting platform 1, the front side of cutting knife is provided with the pair roller 8 of conveying knitting, and pair roller comprises the upper pressure roller and lower compression roller that relatively roll up and down, and knitting is clamped between upper pressure roller and lower compression roller to be carried.Be provided with the stand of support with left and right sides above cutting knife 7, stand is the part cutting platform 1, stand on rear side of cutting knife 7 is provided with two can the erecting frame 9 of height up and down, the left and right sides, front end of pressure rack 3 is hinged on two erecting frames respectively, the rear end of pressure rack 3 is set up on the table top cutting platform 1, and whole pressure rack is downward-sloping from front to back.The front end of pressure rack 3 and hinge-point are coaxially arranged with active rotating shaft 6, and active rotating shaft 6 is provided with the driving pulley 5 that three are installed wrinkle resistant belt 4.The rear end of pressure rack is provided with the passive rotating shaft parallel with active rotating shaft, passive rotating shaft be provided with three with the negative pulley wheel 15 of driving pulley 5 corresponding matching.Wrinkle resistant belt 4 front and back end is set on corresponding driving pulley 5 and negative pulley wheel 15 respectively.The lower surface of wrinkle resistant belt is downward-sloping from front to back.
Cut bottom platform 1 and be provided with drive motor, drive motor output shaft is provided with the first belt pulley 10, the lower compression roller end of pair roller 8 is provided with the second belt pulley 11, the upper pressure roller end of pair roller 8 is provided with the 3rd belt pulley 12, upper pressure roller and lower compression roller are also provided with in the inner side of the second belt pulley and the 3rd belt pulley the synchronous gear wheels 16 engaging each other transmission, stand is provided with transfer belt pulley set 13, and active rotating shaft 6 end of pressure rack 3 is provided with the 4th belt pulley 14.Power transmission line is as follows: drive motor drives the first belt pulley 10, the second belt pulley 11 is driven to rotate by belt-driving, second belt pulley 11 drives lower compression roller to rotate, lower compression roller drives upper pressure roller to rotate by synchronous gear wheels 16,3rd belt pulley 12 of upper pressure roller end drives transfer belt pulley set 13 to rotate by belt-driving, transfer belt pulley set 13 comprises a synchronous large belt wheel and a small pulley, small pulley and the 3rd belt pulley 1:1 transmission, large belt wheel and the 4th belt 14 take turns that to carry out revolution ratio be driving up of 2:3.Above-mentioned belt-driving all adopts cog belt transmission.By above-mentioned transmission, by a propulsion source, pair roller and active rotating shaft is driven to rotate.Active rotating shaft 6 rotating speed is 1.5 times of upper pressure roller rotating speed, and driving pulley 5 is identical with upper pressure roller diameter design, makes the linear velocity of wrinkle resistant belt be 1.5 times of pair roller travel line speed.
During the work of this device, knitting is carried by pair roller, after knitting end exceedes cutting knife, enter on the downside of wrinkle resistant belt and cut between platform upper surface, when delivery speed comparatively fast causes knitting end to hike up encountering wrinkle resistant belt, because wrinkle resistant belt movement speed exceedes knitting delivery speed, one can be produced to throughput direction to knitting end and downward pull tight power, knitting end is pullled to throughput direction, realizes wrinkle resistant.
Above-described embodiment is several preferred version of the present invention, not does any pro forma restriction to the present invention, also has other variant and remodeling under the prerequisite not exceeding the technical scheme described in claim.
The content be not described in detail in this specification sheets, belongs to the known prior art of those skilled in the art.