CN209334949U - For being cut by laser the device of continuous band - Google Patents

Abstract

The utility model discloses a kind of for being cut by laser the device of continuous band, including roller, and continuous band advances on roller along scheduled direction of feed；The roller includes first chamber and circular cowling, and the first chamber keeps vacuum；It is provided with laser cutter above the roller, for cutting continuous band, the laser cutter faces the first chamber of the roller, be provided on the circular cowling multiple through-holes or reticular structure.

Description

For being cut by laser the device of continuous band

Technical field

The utility model relates to the devices for being cut by laser continuous band.

The utility model is commonly used to manufacture personal hygiene products, such as baby' diaper/diaper, sanitary napkin etc..

Background technique

Well known personal hygiene products include being clipped in permeable internal layer nonwoven fabric and impermeable outer layer of polyethene Between absorption pad.

The manufacture of this product include formed include above-mentioned layer continuous band, then by profiling thereof and be finally divided into standard The single item of standby packaging.

Forming step mainly includes cutting leg profile, is generally used for that article is made to have the profile for being suitable for special-purpose.

Prior-art devices for this type operations include roller, and when band advances along predetermined direction, band encloses Around the barrel sections cyclization and laser cutter operate on band during it is by drum.Laser cutter is special The technique that personal hygiene products Shi Yongyu not manufactured because their maintenance requirement it is low and easily controllable and adjustment, especially with When the diced system of the rotating blade used in same technical field is compared, need commonly using more allowing blade replacement or cutting edge Frequent regeneration.

Disadvantageously, the notch made of laser beam generates smog due to the high temperature caused by cutting region part, this Kind effect is mainly due to the distillation of strip material.The smog released tends to the regelation in cutting profile immediately, edge Edge form pearl, the result is that scrambling and visually inaesthetic appearance is presented in cutting profile.This means that smog needs Will before condensation more or less moment remove, so as not to will form the pearl.

Therefore, it is necessary to which smog extraction mouth is arranged to be located in above band, close to laser cutter.

Disadvantageously, by adding this extraction port in the above described manner, the significant increase of the overall dimensions of device, and can Space for installing laser head is also restrained.

It, cannot be from since the part is located at the position farthest away from draught effect in addition, for such construction Smog is removed with the strip material portion of cap contacts to obtain effect good enough.

Utility model content

In view of the foregoing, the main purpose of the utility model is to provide a kind of for being cut by laser continuous band material Device is not influenced by disadvantages mentioned above.

One importance of above-mentioned purpose is to provide a kind of device of compact overall dimensions, continuous for being cut by laser Strip material.

Another purpose of the utility model is to provide a kind of for being cut by laser the device of continuous band, such as allows to exist Smog extraction movement is uniformly and efficiently generated on the entire part of continuous band as far as possible.

Finally, another free-revving engine of the utility model be to provide it is a kind of for being cut by laser the device of continuous band, The device is realized in this way, i.e., the variation of air may be implemented along the whole region of laser cutting.

According to the utility model, the purpose is substantially realized in the device for being cut by laser continuous band.This reality With novel a kind of for being cut by laser the device of continuous band, including roller, continuous band on roller along it is scheduled into Advance to direction；The roller includes first chamber and circular cowling, and the first chamber keeps vacuum；It is set above the roller It is equipped with laser cutter, for cutting continuous band, the laser cutter faces the first chamber of the roller, described Be provided on circular cowling multiple through-holes or reticular structure.

Detailed description of the invention

The utility model will be described in detail in an illustrative manner by means of attached drawing now in Detailed description of the invention, in which:

Fig. 1 is the schematic diagram for showing a part of the system for manufacturing personal hygiene products, and the system is equipped with this reality With in novel for being cut by laser the device of continuous material band.

Fig. 2 is the detailed schematic of the device of Fig. 1.

With reference to Fig. 1, the device of the utility model integrally with Fig. 1 shows.

Specific embodiment

The equipment 1 includes including two feeding rods 4 shown schematically in a uncoiler 2, for corresponding continuous feed first Layer permeable material 3a and second layer impermeable material 3b, makes 3a and 3b synthesize continuous band 3.

Hereafter, by means of multiple tensioning apparatus 5, band 3 advances along predetermined direction " A ", and is directed to the transmission of roller 6 Band, at least part of continuous band 3 around roller 6.Band 3 passes through the tensioning apparatus 5 that is arranged in the downstream of roller 6, court It is transmitted to the direction further handled.

In one embodiment, roller 6 includes the circular cowling 6c of a fixed part 6b and a rotation, installation To fixed part 6b.In this case, continuous band 3 along with its by it is described cover 6c rotation and along direction of feed " A " is mobile, makes to keep fricton-tight contact between band 3 and circular cowling 6c in this way.

In the example in the figures, circular cowling 6c has multiple through hole 6d or reticular structure.

The laser cutter 7 that device 1 includes is located at the side opposite with transmission roller 6 of continuous band 3.Laser is cut Cutter 7 is specifically exactly that manufacture article selection is configured to by cutting away 3 own partial of band for modifying leg profile At least part of peripheral profile.Therefore, laser cutter 7 can also be used in the entire peripheral profile of molded article.

The cutter 7 along two cutting paths " P " cutting of web shown in Fig. 2, relative to direction of feed symmetrically It generates, then band 3 is turned over along direction of advance " A " with the rotation of roller 6.For this purpose, cutter 7 will include extremely as shown in Figure 2 A few mirror scanner 100 is realized in continuous band 3 and is cut along above-mentioned path " P " using the mirror scanner 100. Preferably, cutter 7 will include two mirror scanning means 100, and each expansion of mirror scanner 100 is along two paths One in " P " is cut.Each scanner 100 draws the corresponding laser beam " F " generated by one or more laser sources 101 It leads on cutting region.Each of two laser beams " F " are generated by corresponding source 101, and two light beams " F " are having the same Rated output.Moreover, the section of laser beam " F " is preferably circular.

Each mirror scanner 100 includes focusing device 102, and focusing device 102 is designed to make corresponding laser beam " F " It is properly directed on cutting region, so that it is guaranteed that effectively cutting and guaranteeing quality level on band 3.

In further detail, which includes two accurate galvanometers 103, can each be rotated around relative axis, also There are two the reflecting mirrors 104 of high reflectance to be mounted on the axis of each galvanometer 103, is positioned to receive laser beam " F " and be allowed to It turns to, by reflecting cutting region.Preferably, the rotary shaft of two galvanometers 103 is mutually perpendicular to.Therefore, it is flowed by two inspections Meter 103 can be rotated around their own axis and be operated in combination with each other, and opposite laser beam " F " can be with very accurate Mode be directed on any set point of cutting region.

Focusing device 102 further includes the optics standard that 103 upstream of galvanometer is mounted on relative to the direction of laser beam " F " projection Straight device 105.Collimator 105 preferably includes multiple lens 106 and is combined to provide two major functions.First of lens 106 Function is the lateral dimension of expanded beam " F ", increases its diameter by four times or left and right.Hereafter, focusing device 102 will Light beam " F " focuses on the focal spot of several a few tenths of millimeters.

It is correct on entire cutting region that light beam is to maintain by second function that the lens 106 of collimator 105 execute It focuses, existing different optical distance, i.e. cutting region are not between focusing device 102 and the different cut points of cutting region Flat.Therefore, one in lens 106 can be mobile relative to other lenses, and particularly, can be shown in the arrow It is translated on the direction " X " toward and away from other lenses 106.

In all cases, the targeted region of laser beam is shielded by the cover 8 between band 3 and laser cutter 7, For protecting neighbouring any operator from directly contacting laser beam " F ".

In order to protect laser cutter 7, device 1 further includes pressurization shell 7a, and cutter 7 is contained in the interior of pressurization shell 7 Portion, and under the holding at a pressure exceeding the atmospheric pressure of its enclosure space, to prevent the infiltration from outside air.Therefore sky is avoided Gas dust granules possibly into and be deposited on any possibility on laser cutter 7.

Advantageously, laser cutter 7 is associated with control device 9, controls same cutter 7 by means of the control device 9 Initial position.Control device 9 can guide cross and/or the length travel of cutter 7, allow to by causing cutter 7 Relative motion between band 3 generates selected cutting profile.

Control device 9 also controls the displacement for the linear velocity that cutter 7 advances relative to band 3, allows in continuous band Selected profile is correctly cut on material 3, even if there may be variations for the feed rate of band.

Specifically, control device 9 executes control and set-up function, and equipped with special-purpose software, once it draws and saves Specific cutting path " P ", the special-purpose software guide the signal of the movement of cutter 7 by generating in this way.

In a preferred embodiment, cutter 7 include position sensor, for continuously monitor galvanometric position and with control Device 9 is connected to, to determine the corresponding displacement of cutter 7.

In addition, in order to ensure the quiet run of device 1, it preferably will not between scanning means 100 and cutting region There is any barrier, so that laser beam " F " can reach cutting region without unexpectedly deflecting.

The inside of transmission device 6 has first chamber 10a, fixes and relative to the cutter of the laser cutting device 7 Opposite side, inner vacuum pass through negative pressure device (not shown) connected to it create.The function of the negative pressure first chamber 10a It is to attract the continuous band 3 to circular cowling 6c, it is made to keep the state for tensing and spreading；This is in above-mentioned through hole or net It is completed with the help of shape structure 6d, the major function for establishing the partial vacuum in first chamber 10a is extracted by laser The cigarette generated is cut, via through hole or reticular structure 6d, so that preventing cigarette from condensing and forming pearl in trimming.For this purpose, logical Hole 6d or reticular structure can take up the entire development annular surface 6c of circular cowling, thus described to rotate the phase in the circular cowling 6c Between, first chamber 10a will face the part through-hole 6d of circular cowling 6c always.

In order to ensure the laser cutting region of band is effectively exposed to negative pressure on first chamber 10a, simultaneously Prevent air from penetrating into the chamber 10 from the outside, this will significantly reduce vacuum power.The circular cowling 6c's of fixed part 6b and roller 6 What interface was fluid-tight is connected, and 11 limit first chamber 10a preferably by way of baffle plate, and are furnished with sealing element 12. For the same reason, the side of the roller 6 equally seals.Particularly, the side of roller includes two circles relative to each other Shape wall is being not shown in the figure.

In an alternate embodiment of the device, first chamber 10a may be just rather than negative pressure, such as air blast Machine can be not used in extraction operation.

And in a similar way, in arrangement described above, roller 6 one further include that second chamber indicates 10b, the Two chamber 10b are located in downstream of the first chamber 10a relative to 3 direction of feed of continuous band " A ".In shown example In, first chamber 10a mono- and second chamber 10b be it is adjacent to each other and different, to operate at various pressures, this depends on In performed different functions.More accurately, the function 10b of second chamber can be similar negative pressure, attracts and removal is cut Cut the waste material of the generation of band 3.Therefore, by through hole above-mentioned or reticular structure 6d, to prevent waste material, to work as circular cowling 6c When rotation, retain and transmit band 3 from laser cutter 7 is lower.

The device 1 further includes that a gathering station 13 is located at the lower section for conveying the roller 6.The gathering station 13 is for collecting Waste material segment is freely fallen from circular cowling 6c beyond the region of 10b in second chamber, i.e., no longer by pull of vacuum.

In addition, in a preferred embodiment, waste material will be similarly pumped into gathering station 13 by suction force.

In one embodiment of the utility model, two chambers 10a and 10b can be fluid communication, so as to Single negative pressure source creates partial vacuum.

Shown device 1 further includes blower element 14, and blower element 14 is in continuous band 3 relative on conveyer 6 Side and the region influenced towards stimulated light cutting, function is to 3 input air flow of continuous band.Especially draw to cutting region Flow guide, preferably nitrogen or normal air stream.In a preferred embodiment, blower element 14 is set to and band 3 Area coincidence, towards the first chamber 10a.By this arrangement, cut edge will not be because of the smog of laser cutting generation Condensation and harden.

Preferably, as shown, blower element 14 in shield 14a, shield 14a by having concave side towards continuous band 3 Lid.Blower element 14 and multiple nozzle 14b are arranged along the length direction of shield 14.

At least some multiple nozzle 14b are directed to the region of stimulated light cutting, or towards in the region in cutting area downstream, with Just provide one timely cooling effect and removal by the cigarette that generates.Particularly, stimulated light cuts the region influenced and by air blast The cooling region setting of element 14 is in distance as small as possible, so that any smoke particle is all condensed without the time, and then these Grain can be removed by blowing movement.

Therefore, the partial vacuum of first chamber 10a and air blower shield 14a, which are combined, is more advantageous to remove and pass through The smog for being cut by laser the continuous band and generating.

It is unshowned in the further embodiment of the device, may not there is no first chamber 10a only with blower cover 14a Or second chamber 10b or selectively no second chamber 10b or does not have first chamber 10a.

Disadvantage associated with the prior art is overcome in device according to the present utility model, the arrangement achieves the mesh And provide key advantage.

Firstly, using extraction system associated with first chamber, the part especially generated inside first chamber is true Sky can remove the smog generated by laser cutting operation, the overall dimensions without increasing first chamber.

In addition, the use of air blower shield is advantageous, because air jet may be directed to stimulated light, cutting influences Band region.Meanwhile the smog that laser cutting generates can fast and effeciently be removed by air blower, and can be safe Ground is far from cutting region.

Finally, the combination in first chamber partial vacuum and air blower provides important advantage, it can from stimulated light The region that cutting influences completely removes each smog.Particularly, blower element generates air-flow, and the air-flow is from continuous band face Smog is removed to the part of laser head, while the vacuum of first chamber removes the smog being retained on continuous band.

Claims (8)

1. a kind of for being cut by laser the device of continuous band, it is characterised in that including roller, continuous band on roller along Scheduled direction of feed is advanced；The roller includes first chamber and circular cowling, and the first chamber keeps vacuum；In the roller Cylinder top is provided with laser cutter, and for cutting continuous band, the laser cutter faces described the first of the roller Chamber, be provided on the circular cowling multiple through-holes or reticular structure.

2. according to claim 1 for being cut by laser the device of continuous band, it is characterised in that further comprise one useless Gathering station is expected, along the direction of feed of the band, positioned at the downstream of roller.

3. according to claim 1 for being cut by laser the device of continuous band, it is characterised in that it further include second chamber, Its along the band direction of feed, it is adjacent with the first chamber positioned at the downstream of the first chamber, described first and Two chambers are fluid communication or disconnected.

4. according to claim 1 for being cut by laser the device of continuous band, it is characterised in that the wherein cutter Including at least one scanning means, for laser beam to be directed to the band region of stimulated light cutting, wherein scanning means is One or two.

5. according to claim 4 for being cut by laser the device of continuous band, it is characterised in that wherein each scanning dress It sets including focusing device；The focusing device includes two accurate galvanometers, each precision galvanometer and high reflectance Corresponding mirror is associated, which receives laser beam and by reflecting towards cutting region.

6. according to claim 5 for being cut by laser the device of continuous band, it is characterised in that wherein each galvanometer It can be rotated around corresponding axis, and galvanometric rotary shaft is mutually perpendicular to.

7. according to claim 5 for being cut by laser the device of continuous band, it is characterised in that wherein focusing device is also Optics collimator including being located at galvanometer upstream.

8. according to claim 7 for being cut by laser the device of continuous band, it is characterised in that wherein collimator includes Multiple lens combinations；One of lens can be towards or away from other Lens shifts.